contrib/sendmail-8.13.8/sendmail/deliver.c

   1 /*
   2  * Copyright (c) 1998-2006 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  * Copyright (c) 1983, 1995-1997 Eric P. Allman.  All rights reserved.
   5  * Copyright (c) 1988, 1993
   6  *      The Regents of the University of California.  All rights reserved.
   7  *
   8  * By using this file, you agree to the terms and conditions set
   9  * forth in the LICENSE file which can be found at the top level of
  10  * the sendmail distribution.
  11  *
  12  */
  13
  14 #include <sendmail.h>
  15 #include <sm/time.h>
  16
  17 SM_RCSID("@(#)$Id: deliver.c,v 8.1003.2.1 2006/05/23 01:32:08 ca Exp $")
  18
  19 #if HASSETUSERCONTEXT
  20 # include <login_cap.h>
  21 #endif /* HASSETUSERCONTEXT */
  22
  23 #if NETINET || NETINET6
  24 # include <arpa/inet.h>
  25 #endif /* NETINET || NETINET6 */
  26
  27 #if STARTTLS || SASL
  28 # include "sfsasl.h"
  29 #endif /* STARTTLS || SASL */
  30
  31 static int      deliver __P((ENVELOPE *, ADDRESS *));
  32 static void     dup_queue_file __P((ENVELOPE *, ENVELOPE *, int));
  33 static void     mailfiletimeout __P((int));
  34 static void     endwaittimeout __P((int));
  35 static int      parse_hostsignature __P((char *, char **, MAILER *));
  36 static void     sendenvelope __P((ENVELOPE *, int));
  37 extern MCI      *mci_new __P((SM_RPOOL_T *));
  38 static int      coloncmp __P((const char *, const char *));
  39
  40 #if STARTTLS
  41 static int      starttls __P((MAILER *, MCI *, ENVELOPE *));
  42 static int      endtlsclt __P((MCI *));
  43 #endif /* STARTTLS */
  44 # if STARTTLS || SASL
  45 static bool     iscltflgset __P((ENVELOPE *, int));
  46 # endif /* STARTTLS || SASL */
  47
  48 /*
  49 **  SENDALL -- actually send all the messages.
  50 **
  51 **      Parameters:
  52 **              e -- the envelope to send.
  53 **              mode -- the delivery mode to use.  If SM_DEFAULT, use
  54 **                      the current e->e_sendmode.
  55 **
  56 **      Returns:
  57 **              none.
  58 **
  59 **      Side Effects:
  60 **              Scans the send lists and sends everything it finds.
  61 **              Delivers any appropriate error messages.
  62 **              If we are running in a non-interactive mode, takes the
  63 **                      appropriate action.
  64 */
  65
  66 void
  67 sendall(e, mode)
  68         ENVELOPE *e;
  69         int mode;
  70 {
  71         register ADDRESS *q;
  72         char *owner;
  73         int otherowners;
  74         int save_errno;
  75         register ENVELOPE *ee;
  76         ENVELOPE *splitenv = NULL;
  77         int oldverbose = Verbose;
  78         bool somedeliveries = false, expensive = false;
  79         pid_t pid;
  80
  81         /*
  82         **  If this message is to be discarded, don't bother sending
  83         **  the message at all.
  84         */
  85
  86         if (bitset(EF_DISCARD, e->e_flags))
  87         {
  88                 if (tTd(13, 1))
  89                         sm_dprintf("sendall: discarding id %s\n", e->e_id);
  90                 e->e_flags |= EF_CLRQUEUE;
  91                 if (LogLevel > 9)
  92                         logundelrcpts(e, "discarded", 9, true);
  93                 else if (LogLevel > 4)
  94                         sm_syslog(LOG_INFO, e->e_id, "discarded");
  95                 markstats(e, NULL, STATS_REJECT);
  96                 return;
  97         }
  98
  99         /*
 100         **  If we have had global, fatal errors, don't bother sending
 101         **  the message at all if we are in SMTP mode.  Local errors
 102         **  (e.g., a single address failing) will still cause the other
 103         **  addresses to be sent.
 104         */
 105
 106         if (bitset(EF_FATALERRS, e->e_flags) &&
 107             (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 108         {
 109                 e->e_flags |= EF_CLRQUEUE;
 110                 return;
 111         }
 112
 113         /* determine actual delivery mode */
 114         if (mode == SM_DEFAULT)
 115         {
 116                 mode = e->e_sendmode;
 117                 if (mode != SM_VERIFY && mode != SM_DEFER &&
 118                     shouldqueue(e->e_msgpriority, e->e_ctime))
 119                         mode = SM_QUEUE;
 120         }
 121
 122         if (tTd(13, 1))
 123         {
 124                 sm_dprintf("\n===== SENDALL: mode %c, id %s, e_from ",
 125                         mode, e->e_id);
 126                 printaddr(sm_debug_file(), &e->e_from, false);
 127                 sm_dprintf("\te_flags = ");
 128                 printenvflags(e);
 129                 sm_dprintf("sendqueue:\n");
 130                 printaddr(sm_debug_file(), e->e_sendqueue, true);
 131         }
 132
 133         /*
 134         **  Do any preprocessing necessary for the mode we are running.
 135         **      Check to make sure the hop count is reasonable.
 136         **      Delete sends to the sender in mailing lists.
 137         */
 138
 139         CurEnv = e;
 140         if (tTd(62, 1))
 141                 checkfds(NULL);
 142
 143         if (e->e_hopcount > MaxHopCount)
 144         {
 145                 char *recip;
 146
 147                 if (e->e_sendqueue != NULL &&
 148                     e->e_sendqueue->q_paddr != NULL)
 149                         recip = e->e_sendqueue->q_paddr;
 150                 else
 151                         recip = "(nobody)";
 152
 153                 errno = 0;
 154                 queueup(e, WILL_BE_QUEUED(mode), false);
 155                 e->e_flags |= EF_FATALERRS|EF_PM_NOTIFY|EF_CLRQUEUE;
 156                 ExitStat = EX_UNAVAILABLE;
 157                 syserr("554 5.4.6 Too many hops %d (%d max): from %s via %s, to %s",
 158                        e->e_hopcount, MaxHopCount, e->e_from.q_paddr,
 159                        RealHostName == NULL ? "localhost" : RealHostName,
 160                        recip);
 161                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 162                 {
 163                         if (QS_IS_DEAD(q->q_state))
 164                                 continue;
 165                         q->q_state = QS_BADADDR;
 166                         q->q_status = "5.4.6";
 167                         q->q_rstatus = "554 5.4.6 Too many hops";
 168                 }
 169                 return;
 170         }
 171
 172         /*
 173         **  Do sender deletion.
 174         **
 175         **      If the sender should be queued up, skip this.
 176         **      This can happen if the name server is hosed when you
 177         **      are trying to send mail.  The result is that the sender
 178         **      is instantiated in the queue as a recipient.
 179         */
 180
 181         if (!bitset(EF_METOO, e->e_flags) &&
 182             !QS_IS_QUEUEUP(e->e_from.q_state))
 183         {
 184                 if (tTd(13, 5))
 185                 {
 186                         sm_dprintf("sendall: QS_SENDER ");
 187                         printaddr(sm_debug_file(), &e->e_from, false);
 188                 }
 189                 e->e_from.q_state = QS_SENDER;
 190                 (void) recipient(&e->e_from, &e->e_sendqueue, 0, e);
 191         }
 192
 193         /*
 194         **  Handle alias owners.
 195         **
 196         **      We scan up the q_alias chain looking for owners.
 197         **      We discard owners that are the same as the return path.
 198         */
 199
 200         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 201         {
 202                 register struct address *a;
 203
 204                 for (a = q; a != NULL && a->q_owner == NULL; a = a->q_alias)
 205                         continue;
 206                 if (a != NULL)
 207                         q->q_owner = a->q_owner;
 208
 209                 if (q->q_owner != NULL &&
 210                     !QS_IS_DEAD(q->q_state) &&
 211                     strcmp(q->q_owner, e->e_from.q_paddr) == 0)
 212                         q->q_owner = NULL;
 213         }
 214
 215         if (tTd(13, 25))
 216         {
 217                 sm_dprintf("\nAfter first owner pass, sendq =\n");
 218                 printaddr(sm_debug_file(), e->e_sendqueue, true);
 219         }
 220
 221         owner = "";
 222         otherowners = 1;
 223         while (owner != NULL && otherowners > 0)
 224         {
 225                 if (tTd(13, 28))
 226                         sm_dprintf("owner = \"%s\", otherowners = %d\n",
 227                                    owner, otherowners);
 228                 owner = NULL;
 229                 otherowners = bitset(EF_SENDRECEIPT, e->e_flags) ? 1 : 0;
 230
 231                 for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 232                 {
 233                         if (tTd(13, 30))
 234                         {
 235                                 sm_dprintf("Checking ");
 236                                 printaddr(sm_debug_file(), q, false);
 237                         }
 238                         if (QS_IS_DEAD(q->q_state))
 239                         {
 240                                 if (tTd(13, 30))
 241                                         sm_dprintf("    ... QS_IS_DEAD\n");
 242                                 continue;
 243                         }
 244                         if (tTd(13, 29) && !tTd(13, 30))
 245                         {
 246                                 sm_dprintf("Checking ");
 247                                 printaddr(sm_debug_file(), q, false);
 248                         }
 249
 250                         if (q->q_owner != NULL)
 251                         {
 252                                 if (owner == NULL)
 253                                 {
 254                                         if (tTd(13, 40))
 255                                                 sm_dprintf("    ... First owner = \"%s\"\n",
 256                                                            q->q_owner);
 257                                         owner = q->q_owner;
 258                                 }
 259                                 else if (owner != q->q_owner)
 260                                 {
 261                                         if (strcmp(owner, q->q_owner) == 0)
 262                                         {
 263                                                 if (tTd(13, 40))
 264                                                         sm_dprintf("    ... Same owner = \"%s\"\n",
 265                                                                    owner);
 266
 267                                                 /* make future comparisons cheap */
 268                                                 q->q_owner = owner;
 269                                         }
 270                                         else
 271                                         {
 272                                                 if (tTd(13, 40))
 273                                                         sm_dprintf("    ... Another owner \"%s\"\n",
 274                                                                    q->q_owner);
 275                                                 otherowners++;
 276                                         }
 277                                         owner = q->q_owner;
 278                                 }
 279                                 else if (tTd(13, 40))
 280                                         sm_dprintf("    ... Same owner = \"%s\"\n",
 281                                                    owner);
 282                         }
 283                         else
 284                         {
 285                                 if (tTd(13, 40))
 286                                         sm_dprintf("    ... Null owner\n");
 287                                 otherowners++;
 288                         }
 289
 290                         if (QS_IS_BADADDR(q->q_state))
 291                         {
 292                                 if (tTd(13, 30))
 293                                         sm_dprintf("    ... QS_IS_BADADDR\n");
 294                                 continue;
 295                         }
 296
 297                         if (QS_IS_QUEUEUP(q->q_state))
 298                         {
 299                                 MAILER *m = q->q_mailer;
 300
 301                                 /*
 302                                 **  If we have temporary address failures
 303                                 **  (e.g., dns failure) and a fallback MX is
 304                                 **  set, send directly to the fallback MX host.
 305                                 */
 306
 307                                 if (FallbackMX != NULL &&
 308                                     !wordinclass(FallbackMX, 'w') &&
 309                                     mode != SM_VERIFY &&
 310                                     !bitnset(M_NOMX, m->m_flags) &&
 311                                     strcmp(m->m_mailer, "[IPC]") == 0 &&
 312                                     m->m_argv[0] != NULL &&
 313                                     strcmp(m->m_argv[0], "TCP") == 0)
 314                                 {
 315                                         int len;
 316                                         char *p;
 317
 318                                         if (tTd(13, 30))
 319                                                 sm_dprintf("    ... FallbackMX\n");
 320
 321                                         len = strlen(FallbackMX) + 1;
 322                                         p = sm_rpool_malloc_x(e->e_rpool, len);
 323                                         (void) sm_strlcpy(p, FallbackMX, len);
 324                                         q->q_state = QS_OK;
 325                                         q->q_host = p;
 326                                 }
 327                                 else
 328                                 {
 329                                         if (tTd(13, 30))
 330                                                 sm_dprintf("    ... QS_IS_QUEUEUP\n");
 331                                         continue;
 332                                 }
 333                         }
 334
 335                         /*
 336                         **  If this mailer is expensive, and if we don't
 337                         **  want to make connections now, just mark these
 338                         **  addresses and return.  This is useful if we
 339                         **  want to batch connections to reduce load.  This
 340                         **  will cause the messages to be queued up, and a
 341                         **  daemon will come along to send the messages later.
 342                         */
 343
 344                         if (NoConnect && !Verbose &&
 345                             bitnset(M_EXPENSIVE, q->q_mailer->m_flags))
 346                         {
 347                                 if (tTd(13, 30))
 348                                         sm_dprintf("    ... expensive\n");
 349                                 q->q_state = QS_QUEUEUP;
 350                                 expensive = true;
 351                         }
 352                         else if (bitnset(M_HOLD, q->q_mailer->m_flags) &&
 353                                  QueueLimitId == NULL &&
 354                                  QueueLimitSender == NULL &&
 355                                  QueueLimitRecipient == NULL)
 356                         {
 357                                 if (tTd(13, 30))
 358                                         sm_dprintf("    ... hold\n");
 359                                 q->q_state = QS_QUEUEUP;
 360                                 expensive = true;
 361                         }
 362                         else if (QueueMode != QM_QUARANTINE &&
 363                                  e->e_quarmsg != NULL)
 364                         {
 365                                 if (tTd(13, 30))
 366                                         sm_dprintf("    ... quarantine: %s\n",
 367                                                    e->e_quarmsg);
 368                                 q->q_state = QS_QUEUEUP;
 369                                 expensive = true;
 370                         }
 371                         else
 372                         {
 373                                 if (tTd(13, 30))
 374                                         sm_dprintf("    ... deliverable\n");
 375                                 somedeliveries = true;
 376                         }
 377                 }
 378
 379                 if (owner != NULL && otherowners > 0)
 380                 {
 381                         /*
 382                         **  Split this envelope into two.
 383                         */
 384
 385                         ee = (ENVELOPE *) sm_rpool_malloc_x(e->e_rpool,
 386                                                             sizeof *ee);
 387                         STRUCTCOPY(*e, *ee);
 388                         ee->e_message = NULL;
 389                         ee->e_id = NULL;
 390                         assign_queueid(ee);
 391
 392                         if (tTd(13, 1))
 393                                 sm_dprintf("sendall: split %s into %s, owner = \"%s\", otherowners = %d\n",
 394                                            e->e_id, ee->e_id, owner,
 395                                            otherowners);
 396
 397                         ee->e_header = copyheader(e->e_header, ee->e_rpool);
 398                         ee->e_sendqueue = copyqueue(e->e_sendqueue,
 399                                                     ee->e_rpool);
 400                         ee->e_errorqueue = copyqueue(e->e_errorqueue,
 401                                                      ee->e_rpool);
 402                         ee->e_flags = e->e_flags & ~(EF_INQUEUE|EF_CLRQUEUE|EF_FATALERRS|EF_SENDRECEIPT|EF_RET_PARAM);
 403                         ee->e_flags |= EF_NORECEIPT;
 404                         setsender(owner, ee, NULL, '\0', true);
 405                         if (tTd(13, 5))
 406                         {
 407                                 sm_dprintf("sendall(split): QS_SENDER ");
 408                                 printaddr(sm_debug_file(), &ee->e_from, false);
 409                         }
 410                         ee->e_from.q_state = QS_SENDER;
 411                         ee->e_dfp = NULL;
 412                         ee->e_lockfp = NULL;
 413                         ee->e_xfp = NULL;
 414                         ee->e_qgrp = e->e_qgrp;
 415                         ee->e_qdir = e->e_qdir;
 416                         ee->e_errormode = EM_MAIL;
 417                         ee->e_sibling = splitenv;
 418                         ee->e_statmsg = NULL;
 419                         if (e->e_quarmsg != NULL)
 420                                 ee->e_quarmsg = sm_rpool_strdup_x(ee->e_rpool,
 421                                                                   e->e_quarmsg);
 422                         splitenv = ee;
 423
 424                         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 425                         {
 426                                 if (q->q_owner == owner)
 427                                 {
 428                                         q->q_state = QS_CLONED;
 429                                         if (tTd(13, 6))
 430                                                 sm_dprintf("\t... stripping %s from original envelope\n",
 431                                                            q->q_paddr);
 432                                 }
 433                         }
 434                         for (q = ee->e_sendqueue; q != NULL; q = q->q_next)
 435                         {
 436                                 if (q->q_owner != owner)
 437                                 {
 438                                         q->q_state = QS_CLONED;
 439                                         if (tTd(13, 6))
 440                                                 sm_dprintf("\t... dropping %s from cloned envelope\n",
 441                                                            q->q_paddr);
 442                                 }
 443                                 else
 444                                 {
 445                                         /* clear DSN parameters */
 446                                         q->q_flags &= ~(QHASNOTIFY|Q_PINGFLAGS);
 447                                         q->q_flags |= DefaultNotify & ~QPINGONSUCCESS;
 448                                         if (tTd(13, 6))
 449                                                 sm_dprintf("\t... moving %s to cloned envelope\n",
 450                                                            q->q_paddr);
 451                                 }
 452                         }
 453
 454                         if (mode != SM_VERIFY && bitset(EF_HAS_DF, e->e_flags))
 455                                 dup_queue_file(e, ee, DATAFL_LETTER);
 456
 457                         /*
 458                         **  Give the split envelope access to the parent
 459                         **  transcript file for errors obtained while
 460                         **  processing the recipients (done before the
 461                         **  envelope splitting).
 462                         */
 463
 464                         if (e->e_xfp != NULL)
 465                                 ee->e_xfp = sm_io_dup(e->e_xfp);
 466
 467                         /* failed to dup e->e_xfp, start a new transcript */
 468                         if (ee->e_xfp == NULL)
 469                                 openxscript(ee);
 470
 471                         if (mode != SM_VERIFY && LogLevel > 4)
 472                                 sm_syslog(LOG_INFO, e->e_id,
 473                                           "%s: clone: owner=%s",
 474                                           ee->e_id, owner);
 475                 }
 476         }
 477
 478         if (owner != NULL)
 479         {
 480                 setsender(owner, e, NULL, '\0', true);
 481                 if (tTd(13, 5))
 482                 {
 483                         sm_dprintf("sendall(owner): QS_SENDER ");
 484                         printaddr(sm_debug_file(), &e->e_from, false);
 485                 }
 486                 e->e_from.q_state = QS_SENDER;
 487                 e->e_errormode = EM_MAIL;
 488                 e->e_flags |= EF_NORECEIPT;
 489                 e->e_flags &= ~EF_FATALERRS;
 490         }
 491
 492         /* if nothing to be delivered, just queue up everything */
 493         if (!somedeliveries && !WILL_BE_QUEUED(mode) &&
 494             mode != SM_VERIFY)
 495         {
 496                 time_t now;
 497
 498                 if (tTd(13, 29))
 499                         sm_dprintf("No deliveries: auto-queuing\n");
 500                 mode = SM_QUEUE;
 501                 now = curtime();
 502
 503                 /* treat this as a delivery in terms of counting tries */
 504                 e->e_dtime = now;
 505                 if (!expensive)
 506                         e->e_ntries++;
 507                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 508                 {
 509                         ee->e_dtime = now;
 510                         if (!expensive)
 511                                 ee->e_ntries++;
 512                 }
 513         }
 514
 515         if ((WILL_BE_QUEUED(mode) || mode == SM_FORK ||
 516              (mode != SM_VERIFY &&
 517               (SuperSafe == SAFE_REALLY ||
 518                SuperSafe == SAFE_REALLY_POSTMILTER))) &&
 519             (!bitset(EF_INQUEUE, e->e_flags) || splitenv != NULL))
 520         {
 521                 bool msync;
 522
 523                 /*
 524                 **  Be sure everything is instantiated in the queue.
 525                 **  Split envelopes first in case the machine crashes.
 526                 **  If the original were done first, we may lose
 527                 **  recipients.
 528                 */
 529
 530 #if !HASFLOCK
 531                 msync = false;
 532 #else /* !HASFLOCK */
 533                 msync = mode == SM_FORK;
 534 #endif /* !HASFLOCK */
 535
 536                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 537                         queueup(ee, WILL_BE_QUEUED(mode), msync);
 538                 queueup(e, WILL_BE_QUEUED(mode), msync);
 539         }
 540
 541         if (tTd(62, 10))
 542                 checkfds("after envelope splitting");
 543
 544         /*
 545         **  If we belong in background, fork now.
 546         */
 547
 548         if (tTd(13, 20))
 549         {
 550                 sm_dprintf("sendall: final mode = %c\n", mode);
 551                 if (tTd(13, 21))
 552                 {
 553                         sm_dprintf("\n================ Final Send Queue(s) =====================\n");
 554                         sm_dprintf("\n  *** Envelope %s, e_from=%s ***\n",
 555                                    e->e_id, e->e_from.q_paddr);
 556                         printaddr(sm_debug_file(), e->e_sendqueue, true);
 557                         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 558                         {
 559                                 sm_dprintf("\n  *** Envelope %s, e_from=%s ***\n",
 560                                            ee->e_id, ee->e_from.q_paddr);
 561                                 printaddr(sm_debug_file(), ee->e_sendqueue, true);
 562                         }
 563                         sm_dprintf("==========================================================\n\n");
 564                 }
 565         }
 566         switch (mode)
 567         {
 568           case SM_VERIFY:
 569                 Verbose = 2;
 570                 break;
 571
 572           case SM_QUEUE:
 573           case SM_DEFER:
 574 #if HASFLOCK
 575   queueonly:
 576 #endif /* HASFLOCK */
 577                 if (e->e_nrcpts > 0)
 578                         e->e_flags |= EF_INQUEUE;
 579                 dropenvelope(e, splitenv != NULL, true);
 580                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 581                 {
 582                         if (ee->e_nrcpts > 0)
 583                                 ee->e_flags |= EF_INQUEUE;
 584                         dropenvelope(ee, false, true);
 585                 }
 586                 return;
 587
 588           case SM_FORK:
 589                 if (e->e_xfp != NULL)
 590                         (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
 591
 592 #if !HASFLOCK
 593                 /*
 594                 **  Since fcntl locking has the interesting semantic that
 595                 **  the lock is owned by a process, not by an open file
 596                 **  descriptor, we have to flush this to the queue, and
 597                 **  then restart from scratch in the child.
 598                 */
 599
 600                 {
 601                         /* save id for future use */
 602                         char *qid = e->e_id;
 603
 604                         /* now drop the envelope in the parent */
 605                         e->e_flags |= EF_INQUEUE;
 606                         dropenvelope(e, splitenv != NULL, false);
 607
 608                         /* arrange to reacquire lock after fork */
 609                         e->e_id = qid;
 610                 }
 611
 612                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 613                 {
 614                         /* save id for future use */
 615                         char *qid = ee->e_id;
 616
 617                         /* drop envelope in parent */
 618                         ee->e_flags |= EF_INQUEUE;
 619                         dropenvelope(ee, false, false);
 620
 621                         /* and save qid for reacquisition */
 622                         ee->e_id = qid;
 623                 }
 624
 625 #endif /* !HASFLOCK */
 626
 627                 /*
 628                 **  Since the delivery may happen in a child and the parent
 629                 **  does not wait, the parent may close the maps thereby
 630                 **  removing any shared memory used by the map.  Therefore,
 631                 **  close the maps now so the child will dynamically open
 632                 **  them if necessary.
 633                 */
 634
 635                 closemaps(false);
 636
 637                 pid = fork();
 638                 if (pid < 0)
 639                 {
 640                         syserr("deliver: fork 1");
 641 #if HASFLOCK
 642                         goto queueonly;
 643 #else /* HASFLOCK */
 644                         e->e_id = NULL;
 645                         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 646                                 ee->e_id = NULL;
 647                         return;
 648 #endif /* HASFLOCK */
 649                 }
 650                 else if (pid > 0)
 651                 {
 652 #if HASFLOCK
 653                         /* be sure we leave the temp files to our child */
 654                         /* close any random open files in the envelope */
 655                         closexscript(e);
 656                         if (e->e_dfp != NULL)
 657                                 (void) sm_io_close(e->e_dfp, SM_TIME_DEFAULT);
 658                         e->e_dfp = NULL;
 659                         e->e_flags &= ~EF_HAS_DF;
 660
 661                         /* can't call unlockqueue to avoid unlink of xfp */
 662                         if (e->e_lockfp != NULL)
 663                                 (void) sm_io_close(e->e_lockfp, SM_TIME_DEFAULT);
 664                         else
 665                                 syserr("%s: sendall: null lockfp", e->e_id);
 666                         e->e_lockfp = NULL;
 667 #endif /* HASFLOCK */
 668
 669                         /* make sure the parent doesn't own the envelope */
 670                         e->e_id = NULL;
 671
 672 #if USE_DOUBLE_FORK
 673                         /* catch intermediate zombie */
 674                         (void) waitfor(pid);
 675 #endif /* USE_DOUBLE_FORK */
 676                         return;
 677                 }
 678
 679                 /* Reset global flags */
 680                 RestartRequest = NULL;
 681                 RestartWorkGroup = false;
 682                 ShutdownRequest = NULL;
 683                 PendingSignal = 0;
 684
 685                 /*
 686                 **  Initialize exception stack and default exception
 687                 **  handler for child process.
 688                 */
 689
 690                 sm_exc_newthread(fatal_error);
 691
 692                 /*
 693                 **  Since we have accepted responsbility for the message,
 694                 **  change the SIGTERM handler.  intsig() (the old handler)
 695                 **  would remove the envelope if this was a command line
 696                 **  message submission.
 697                 */
 698
 699                 (void) sm_signal(SIGTERM, SIG_DFL);
 700
 701 #if USE_DOUBLE_FORK
 702                 /* double fork to avoid zombies */
 703                 pid = fork();
 704                 if (pid > 0)
 705                         exit(EX_OK);
 706                 save_errno = errno;
 707 #endif /* USE_DOUBLE_FORK */
 708
 709                 CurrentPid = getpid();
 710
 711                 /* be sure we are immune from the terminal */
 712                 disconnect(2, e);
 713                 clearstats();
 714
 715                 /* prevent parent from waiting if there was an error */
 716                 if (pid < 0)
 717                 {
 718                         errno = save_errno;
 719                         syserr("deliver: fork 2");
 720 #if HASFLOCK
 721                         e->e_flags |= EF_INQUEUE;
 722 #else /* HASFLOCK */
 723                         e->e_id = NULL;
 724 #endif /* HASFLOCK */
 725                         finis(true, true, ExitStat);
 726                 }
 727
 728                 /* be sure to give error messages in child */
 729                 QuickAbort = false;
 730
 731                 /*
 732                 **  Close any cached connections.
 733                 **
 734                 **      We don't send the QUIT protocol because the parent
 735                 **      still knows about the connection.
 736                 **
 737                 **      This should only happen when delivering an error
 738                 **      message.
 739                 */
 740
 741                 mci_flush(false, NULL);
 742
 743 #if HASFLOCK
 744                 break;
 745 #else /* HASFLOCK */
 746
 747                 /*
 748                 **  Now reacquire and run the various queue files.
 749                 */
 750
 751                 for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 752                 {
 753                         ENVELOPE *sibling = ee->e_sibling;
 754
 755                         (void) dowork(ee->e_qgrp, ee->e_qdir, ee->e_id,
 756                                       false, false, ee);
 757                         ee->e_sibling = sibling;
 758                 }
 759                 (void) dowork(e->e_qgrp, e->e_qdir, e->e_id,
 760                               false, false, e);
 761                 finis(true, true, ExitStat);
 762 #endif /* HASFLOCK */
 763         }
 764
 765         sendenvelope(e, mode);
 766         dropenvelope(e, true, true);
 767         for (ee = splitenv; ee != NULL; ee = ee->e_sibling)
 768         {
 769                 CurEnv = ee;
 770                 if (mode != SM_VERIFY)
 771                         openxscript(ee);
 772                 sendenvelope(ee, mode);
 773                 dropenvelope(ee, true, true);
 774         }
 775         CurEnv = e;
 776
 777         Verbose = oldverbose;
 778         if (mode == SM_FORK)
 779                 finis(true, true, ExitStat);
 780 }
 781
 782 static void
 783 sendenvelope(e, mode)
 784         register ENVELOPE *e;
 785         int mode;
 786 {
 787         register ADDRESS *q;
 788         bool didany;
 789
 790         if (tTd(13, 10))
 791                 sm_dprintf("sendenvelope(%s) e_flags=0x%lx\n",
 792                            e->e_id == NULL ? "[NOQUEUE]" : e->e_id,
 793                            e->e_flags);
 794         if (LogLevel > 80)
 795                 sm_syslog(LOG_DEBUG, e->e_id,
 796                           "sendenvelope, flags=0x%lx",
 797                           e->e_flags);
 798
 799         /*
 800         **  If we have had global, fatal errors, don't bother sending
 801         **  the message at all if we are in SMTP mode.  Local errors
 802         **  (e.g., a single address failing) will still cause the other
 803         **  addresses to be sent.
 804         */
 805
 806         if (bitset(EF_FATALERRS, e->e_flags) &&
 807             (OpMode == MD_SMTP || OpMode == MD_DAEMON))
 808         {
 809                 e->e_flags |= EF_CLRQUEUE;
 810                 return;
 811         }
 812
 813         /*
 814         **  Don't attempt deliveries if we want to bounce now
 815         **  or if deliver-by time is exceeded.
 816         */
 817
 818         if (!bitset(EF_RESPONSE, e->e_flags) &&
 819             (TimeOuts.to_q_return[e->e_timeoutclass] == NOW ||
 820              (IS_DLVR_RETURN(e) && e->e_deliver_by > 0 &&
 821               curtime() > e->e_ctime + e->e_deliver_by)))
 822                 return;
 823
 824         /*
 825         **  Run through the list and send everything.
 826         **
 827         **      Set EF_GLOBALERRS so that error messages during delivery
 828         **      result in returned mail.
 829         */
 830
 831         e->e_nsent = 0;
 832         e->e_flags |= EF_GLOBALERRS;
 833
 834         macdefine(&e->e_macro, A_PERM, macid("{envid}"), e->e_envid);
 835         macdefine(&e->e_macro, A_PERM, macid("{bodytype}"), e->e_bodytype);
 836         didany = false;
 837
 838         if (!bitset(EF_SPLIT, e->e_flags))
 839         {
 840                 ENVELOPE *oldsib;
 841                 ENVELOPE *ee;
 842
 843                 /*
 844                 **  Save old sibling and set it to NULL to avoid
 845                 **  queueing up the same envelopes again.
 846                 **  This requires that envelopes in that list have
 847                 **  been take care of before (or at some other place).
 848                 */
 849
 850                 oldsib = e->e_sibling;
 851                 e->e_sibling = NULL;
 852                 if (!split_by_recipient(e) &&
 853                     bitset(EF_FATALERRS, e->e_flags))
 854                 {
 855                         if (OpMode == MD_SMTP || OpMode == MD_DAEMON)
 856                                 e->e_flags |= EF_CLRQUEUE;
 857                         return;
 858                 }
 859                 for (ee = e->e_sibling; ee != NULL; ee = ee->e_sibling)
 860                         queueup(ee, false, true);
 861
 862                 /* clean up */
 863                 for (ee = e->e_sibling; ee != NULL; ee = ee->e_sibling)
 864                 {
 865                         /* now unlock the job */
 866                         closexscript(ee);
 867                         unlockqueue(ee);
 868
 869                         /* this envelope is marked unused */
 870                         if (ee->e_dfp != NULL)
 871                         {
 872                                 (void) sm_io_close(ee->e_dfp, SM_TIME_DEFAULT);
 873                                 ee->e_dfp = NULL;
 874                         }
 875                         ee->e_id = NULL;
 876                         ee->e_flags &= ~EF_HAS_DF;
 877                 }
 878                 e->e_sibling = oldsib;
 879         }
 880
 881         /* now run through the queue */
 882         for (q = e->e_sendqueue; q != NULL; q = q->q_next)
 883         {
 884 #if XDEBUG
 885                 char wbuf[MAXNAME + 20];
 886
 887                 (void) sm_snprintf(wbuf, sizeof wbuf, "sendall(%.*s)",
 888                                    MAXNAME, q->q_paddr);
 889                 checkfd012(wbuf);
 890 #endif /* XDEBUG */
 891                 if (mode == SM_VERIFY)
 892                 {
 893                         e->e_to = q->q_paddr;
 894                         if (QS_IS_SENDABLE(q->q_state))
 895                         {
 896                                 if (q->q_host != NULL && q->q_host[0] != '\0')
 897                                         message("deliverable: mailer %s, host %s, user %s",
 898                                                 q->q_mailer->m_name,
 899                                                 q->q_host,
 900                                                 q->q_user);
 901                                 else
 902                                         message("deliverable: mailer %s, user %s",
 903                                                 q->q_mailer->m_name,
 904                                                 q->q_user);
 905                         }
 906                 }
 907                 else if (QS_IS_OK(q->q_state))
 908                 {
 909                         /*
 910                         **  Checkpoint the send list every few addresses
 911                         */
 912
 913                         if (CheckpointInterval > 0 &&
 914                             e->e_nsent >= CheckpointInterval)
 915                         {
 916                                 queueup(e, false, false);
 917                                 e->e_nsent = 0;
 918                         }
 919                         (void) deliver(e, q);
 920                         didany = true;
 921                 }
 922         }
 923         if (didany)
 924         {
 925                 e->e_dtime = curtime();
 926                 e->e_ntries++;
 927         }
 928
 929 #if XDEBUG
 930         checkfd012("end of sendenvelope");
 931 #endif /* XDEBUG */
 932 }
 933
 934 #if REQUIRES_DIR_FSYNC
 935 /*
 936 **  SYNC_DIR -- fsync a directory based on a filename
 937 **
 938 **      Parameters:
 939 **              filename -- path of file
 940 **              panic -- panic?
 941 **
 942 **      Returns:
 943 **              none
 944 */
 945
 946 void
 947 sync_dir(filename, panic)
 948         char *filename;
 949         bool panic;
 950 {
 951         int dirfd;
 952         char *dirp;
 953         char dir[MAXPATHLEN];
 954
 955         if (!RequiresDirfsync)
 956                 return;
 957
 958         /* filesystems which require the directory be synced */
 959         dirp = strrchr(filename, '/');
 960         if (dirp != NULL)
 961         {
 962                 if (sm_strlcpy(dir, filename, sizeof dir) >= sizeof dir)
 963                         return;
 964                 dir[dirp - filename] = '\0';
 965                 dirp = dir;
 966         }
 967         else
 968                 dirp = ".";
 969         dirfd = open(dirp, O_RDONLY, 0700);
 970         if (tTd(40,32))
 971                 sm_syslog(LOG_INFO, NOQID, "sync_dir: %s: fsync(%d)",
 972                           dirp, dirfd);
 973         if (dirfd >= 0)
 974         {
 975                 if (fsync(dirfd) < 0)
 976                 {
 977                         if (panic)
 978                                 syserr("!sync_dir: cannot fsync directory %s",
 979                                        dirp);
 980                         else if (LogLevel > 1)
 981                                 sm_syslog(LOG_ERR, NOQID,
 982                                           "sync_dir: cannot fsync directory %s: %s",
 983                                           dirp, sm_errstring(errno));
 984                 }
 985                 (void) close(dirfd);
 986         }
 987 }
 988 #endif /* REQUIRES_DIR_FSYNC */
 989 /*
 990 **  DUP_QUEUE_FILE -- duplicate a queue file into a split queue
 991 **
 992 **      Parameters:
 993 **              e -- the existing envelope
 994 **              ee -- the new envelope
 995 **              type -- the queue file type (e.g., DATAFL_LETTER)
 996 **
 997 **      Returns:
 998 **              none
 999 */
1000
1001 static void
1002 dup_queue_file(e, ee, type)
1003         ENVELOPE *e, *ee;
1004         int type;
1005 {
1006         char f1buf[MAXPATHLEN], f2buf[MAXPATHLEN];
1007
1008         ee->e_dfp = NULL;
1009         ee->e_xfp = NULL;
1010
1011         /*
1012         **  Make sure both are in the same directory.
1013         */
1014
1015         (void) sm_strlcpy(f1buf, queuename(e, type), sizeof f1buf);
1016         (void) sm_strlcpy(f2buf, queuename(ee, type), sizeof f2buf);
1017
1018         /* Force the df to disk if it's not there yet */
1019         if (type == DATAFL_LETTER && e->e_dfp != NULL &&
1020             sm_io_setinfo(e->e_dfp, SM_BF_COMMIT, NULL) < 0 &&
1021             errno != EINVAL)
1022         {
1023                 syserr("!dup_queue_file: can't commit %s", f1buf);
1024                 /* NOTREACHED */
1025         }
1026
1027         if (link(f1buf, f2buf) < 0)
1028         {
1029                 int save_errno = errno;
1030
1031                 syserr("sendall: link(%s, %s)", f1buf, f2buf);
1032                 if (save_errno == EEXIST)
1033                 {
1034                         if (unlink(f2buf) < 0)
1035                         {
1036                                 syserr("!sendall: unlink(%s): permanent",
1037                                        f2buf);
1038                                 /* NOTREACHED */
1039                         }
1040                         if (link(f1buf, f2buf) < 0)
1041                         {
1042                                 syserr("!sendall: link(%s, %s): permanent",
1043                                        f1buf, f2buf);
1044                                 /* NOTREACHED */
1045                         }
1046                 }
1047         }
1048         SYNC_DIR(f2buf, true);
1049 }
1050 /*
1051 **  DOFORK -- do a fork, retrying a couple of times on failure.
1052 **
1053 **      This MUST be a macro, since after a vfork we are running
1054 **      two processes on the same stack!!!
1055 **
1056 **      Parameters:
1057 **              none.
1058 **
1059 **      Returns:
1060 **              From a macro???  You've got to be kidding!
1061 **
1062 **      Side Effects:
1063 **              Modifies the ==> LOCAL <== variable 'pid', leaving:
1064 **                      pid of child in parent, zero in child.
1065 **                      -1 on unrecoverable error.
1066 **
1067 **      Notes:
1068 **              I'm awfully sorry this looks so awful.  That's
1069 **              vfork for you.....
1070 */
1071
1072 #define NFORKTRIES      5
1073
1074 #ifndef FORK
1075 # define FORK   fork
1076 #endif /* ! FORK */
1077
1078 #define DOFORK(fORKfN) \
1079 {\
1080         register int i;\
1081 \
1082         for (i = NFORKTRIES; --i >= 0; )\
1083         {\
1084                 pid = fORKfN();\
1085                 if (pid >= 0)\
1086                         break;\
1087                 if (i > 0)\
1088                         (void) sleep((unsigned) NFORKTRIES - i);\
1089         }\
1090 }
1091 /*
1092 **  DOFORK -- simple fork interface to DOFORK.
1093 **
1094 **      Parameters:
1095 **              none.
1096 **
1097 **      Returns:
1098 **              pid of child in parent.
1099 **              zero in child.
1100 **              -1 on error.
1101 **
1102 **      Side Effects:
1103 **              returns twice, once in parent and once in child.
1104 */
1105
1106 pid_t
1107 dofork()
1108 {
1109         register pid_t pid = -1;
1110
1111         DOFORK(fork);
1112         return pid;
1113 }
1114
1115 /*
1116 **  COLONCMP -- compare host-signatures up to first ':' or EOS
1117 **
1118 **      This takes two strings which happen to be host-signatures and
1119 **      compares them. If the lowest preference portions of the MX-RR's
1120 **      match (up to ':' or EOS, whichever is first), then we have
1121 **      match. This is used for coattail-piggybacking messages during
1122 **      message delivery.
1123 **      If the signatures are the same up to the first ':' the remainder of
1124 **      the signatures are then compared with a normal strcmp(). This saves
1125 **      re-examining the first part of the signatures.
1126 **
1127 **      Parameters:
1128 **              a - first host-signature
1129 **              b - second host-signature
1130 **
1131 **      Returns:
1132 **              HS_MATCH_NO -- no "match".
1133 **              HS_MATCH_FIRST -- "match" for the first MX preference
1134 **                      (up to the first colon (':')).
1135 **              HS_MATCH_FULL -- match for the entire MX record.
1136 **
1137 **      Side Effects:
1138 **              none.
1139 */
1140
1141 #define HS_MATCH_NO     0
1142 #define HS_MATCH_FIRST  1
1143 #define HS_MATCH_FULL   2
1144
1145 static int
1146 coloncmp(a, b)
1147         register const char *a;
1148         register const char *b;
1149 {
1150         int ret = HS_MATCH_NO;
1151         int braclev = 0;
1152
1153         while (*a == *b++)
1154         {
1155                 /* Need to account for IPv6 bracketed addresses */
1156                 if (*a == '[')
1157                         braclev++;
1158                 else if (*a == ']' && braclev > 0)
1159                         braclev--;
1160                 else if (*a == ':' && braclev <= 0)
1161                 {
1162                         ret = HS_MATCH_FIRST;
1163                         a++;
1164                         break;
1165                 }
1166                 else if (*a == '\0')
1167                         return HS_MATCH_FULL; /* a full match */
1168                 a++;
1169         }
1170         if (ret == HS_MATCH_NO &&
1171             braclev <= 0 &&
1172             ((*a == '\0' && *(b - 1) == ':') ||
1173              (*a == ':' && *(b - 1) == '\0')))
1174                 return HS_MATCH_FIRST;
1175         if (ret == HS_MATCH_FIRST && strcmp(a, b) == 0)
1176                 return HS_MATCH_FULL;
1177
1178         return ret;
1179 }
1180
1181 /*
1182 **  SHOULD_TRY_FBSH -- Should try FallbackSmartHost?
1183 **
1184 **      Parameters:
1185 **              e -- envelope
1186 **              tried_fallbacksmarthost -- has been tried already? (in/out)
1187 **              hostbuf -- buffer for hostname (expand FallbackSmartHost) (out)
1188 **              hbsz -- size of hostbuf
1189 **              status -- current delivery status
1190 **
1191 **      Returns:
1192 **              true iff FallbackSmartHost should be tried.
1193 */
1194
1195 static bool
1196 should_try_fbsh(e, tried_fallbacksmarthost, hostbuf, hbsz, status)
1197         ENVELOPE *e;
1198         bool *tried_fallbacksmarthost;
1199         char *hostbuf;
1200         size_t hbsz;
1201         int status;
1202 {
1203         /*
1204         **  If the host was not found or a temporary failure occurred
1205         **  and a FallbackSmartHost is defined (and we have not yet
1206         **  tried it), then make one last try with it as the host.
1207         */
1208
1209         if ((status == EX_NOHOST || status == EX_TEMPFAIL) &&
1210             FallbackSmartHost != NULL && !*tried_fallbacksmarthost)
1211         {
1212                 *tried_fallbacksmarthost = true;
1213                 expand(FallbackSmartHost, hostbuf, hbsz, e);
1214                 if (!wordinclass(hostbuf, 'w'))
1215                 {
1216                         if (tTd(11, 1))
1217                                 sm_dprintf("one last try with FallbackSmartHost %s\n",
1218                                            hostbuf);
1219                         return true;
1220                 }
1221         }
1222         return false;
1223 }
1224 /*
1225 **  DELIVER -- Deliver a message to a list of addresses.
1226 **
1227 **      This routine delivers to everyone on the same host as the
1228 **      user on the head of the list.  It is clever about mailers
1229 **      that don't handle multiple users.  It is NOT guaranteed
1230 **      that it will deliver to all these addresses however -- so
1231 **      deliver should be called once for each address on the
1232 **      list.
1233 **      Deliver tries to be as opportunistic as possible about piggybacking
1234 **      messages. Some definitions to make understanding easier follow below.
1235 **      Piggybacking occurs when an existing connection to a mail host can
1236 **      be used to send the same message to more than one recipient at the
1237 **      same time. So "no piggybacking" means one message for one recipient
1238 **      per connection. "Intentional piggybacking" happens when the
1239 **      recipients' host address (not the mail host address) is used to
1240 **      attempt piggybacking. Recipients with the same host address
1241 **      have the same mail host. "Coincidental piggybacking" relies on
1242 **      piggybacking based on all the mail host addresses in the MX-RR. This
1243 **      is "coincidental" in the fact it could not be predicted until the
1244 **      MX Resource Records for the hosts were obtained and examined. For
1245 **      example (preference order and equivalence is important, not values):
1246 **              domain1 IN MX 10 mxhost-A
1247 **                      IN MX 20 mxhost-B
1248 **              domain2 IN MX  4 mxhost-A
1249 **                      IN MX  8 mxhost-B
1250 **      Domain1 and domain2 can piggyback the same message to mxhost-A or
1251 **      mxhost-B (if mxhost-A cannot be reached).
1252 **      "Coattail piggybacking" relaxes the strictness of "coincidental
1253 **      piggybacking" in the hope that most significant (lowest value)
1254 **      MX preference host(s) can create more piggybacking. For example
1255 **      (again, preference order and equivalence is important, not values):
1256 **              domain3 IN MX 100 mxhost-C
1257 **                      IN MX 100 mxhost-D
1258 **                      IN MX 200 mxhost-E
1259 **              domain4 IN MX  50 mxhost-C
1260 **                      IN MX  50 mxhost-D
1261 **                      IN MX  80 mxhost-F
1262 **      A message for domain3 and domain4 can piggyback to mxhost-C if mxhost-C
1263 **      is available. Same with mxhost-D because in both RR's the preference
1264 **      value is the same as mxhost-C, respectively.
1265 **      So deliver attempts coattail piggybacking when possible. If the
1266 **      first MX preference level hosts cannot be used then the piggybacking
1267 **      reverts to coincidental piggybacking. Using the above example you
1268 **      cannot deliver to mxhost-F for domain3 regardless of preference value.
1269 **      ("Coattail" from "riding on the coattails of your predecessor" meaning
1270 **      gaining benefit from a predecessor effort with no or little addition
1271 **      effort. The predecessor here being the preceding MX RR).
1272 **
1273 **      Parameters:
1274 **              e -- the envelope to deliver.
1275 **              firstto -- head of the address list to deliver to.
1276 **
1277 **      Returns:
1278 **              zero -- successfully delivered.
1279 **              else -- some failure, see ExitStat for more info.
1280 **
1281 **      Side Effects:
1282 **              The standard input is passed off to someone.
1283 */
1284
1285 static int
1286 deliver(e, firstto)
1287         register ENVELOPE *e;
1288         ADDRESS *firstto;
1289 {
1290         char *host;                     /* host being sent to */
1291         char *user;                     /* user being sent to */
1292         char **pvp;
1293         register char **mvp;
1294         register char *p;
1295         register MAILER *m;             /* mailer for this recipient */
1296         ADDRESS *volatile ctladdr;
1297 #if HASSETUSERCONTEXT
1298         ADDRESS *volatile contextaddr = NULL;
1299 #endif /* HASSETUSERCONTEXT */
1300         register MCI *volatile mci;
1301         register ADDRESS *SM_NONVOLATILE to = firstto;
1302         volatile bool clever = false;   /* running user smtp to this mailer */
1303         ADDRESS *volatile tochain = NULL; /* users chain in this mailer call */
1304         int rcode;                      /* response code */
1305         SM_NONVOLATILE int lmtp_rcode = EX_OK;
1306         SM_NONVOLATILE int nummxhosts = 0; /* number of MX hosts available */
1307         SM_NONVOLATILE int hostnum = 0; /* current MX host index */
1308         char *firstsig;                 /* signature of firstto */
1309         volatile pid_t pid = -1;
1310         char *volatile curhost;
1311         SM_NONVOLATILE unsigned short port = 0;
1312         SM_NONVOLATILE time_t enough = 0;
1313 #if NETUNIX
1314         char *SM_NONVOLATILE mux_path = NULL;   /* path to UNIX domain socket */
1315 #endif /* NETUNIX */
1316         time_t xstart;
1317         bool suidwarn;
1318         bool anyok;                     /* at least one address was OK */
1319         SM_NONVOLATILE bool goodmxfound = false; /* at least one MX was OK */
1320         bool ovr;
1321         bool quarantine;
1322         int strsize;
1323         int rcptcount;
1324         int ret;
1325         static int tobufsize = 0;
1326         static char *tobuf = NULL;
1327         char *rpath;    /* translated return path */
1328         int mpvect[2];
1329         int rpvect[2];
1330         char *mxhosts[MAXMXHOSTS + 1];
1331         char *pv[MAXPV + 1];
1332         char buf[MAXNAME + 1];
1333         char cbuf[MAXPATHLEN];
1334
1335         errno = 0;
1336         if (!QS_IS_OK(to->q_state))
1337                 return 0;
1338
1339         suidwarn = geteuid() == 0;
1340
1341         m = to->q_mailer;
1342         host = to->q_host;
1343         CurEnv = e;                     /* just in case */
1344         e->e_statmsg = NULL;
1345         SmtpError[0] = '\0';
1346         xstart = curtime();
1347
1348         if (tTd(10, 1))
1349                 sm_dprintf("\n--deliver, id=%s, mailer=%s, host=`%s', first user=`%s'\n",
1350                         e->e_id, m->m_name, host, to->q_user);
1351         if (tTd(10, 100))
1352                 printopenfds(false);
1353
1354         /*
1355         **  Clear {client_*} macros if this is a bounce message to
1356         **  prevent rejection by check_compat ruleset.
1357         */
1358
1359         if (bitset(EF_RESPONSE, e->e_flags))
1360         {
1361                 macdefine(&e->e_macro, A_PERM, macid("{client_name}"), "");
1362                 macdefine(&e->e_macro, A_PERM, macid("{client_ptr}"), "");
1363                 macdefine(&e->e_macro, A_PERM, macid("{client_addr}"), "");
1364                 macdefine(&e->e_macro, A_PERM, macid("{client_port}"), "");
1365                 macdefine(&e->e_macro, A_PERM, macid("{client_resolve}"), "");
1366         }
1367
1368         SM_TRY
1369         {
1370         ADDRESS *skip_back = NULL;
1371
1372         /*
1373         **  Do initial argv setup.
1374         **      Insert the mailer name.  Notice that $x expansion is
1375         **      NOT done on the mailer name.  Then, if the mailer has
1376         **      a picky -f flag, we insert it as appropriate.  This
1377         **      code does not check for 'pv' overflow; this places a
1378         **      manifest lower limit of 4 for MAXPV.
1379         **              The from address rewrite is expected to make
1380         **              the address relative to the other end.
1381         */
1382
1383         /* rewrite from address, using rewriting rules */
1384         rcode = EX_OK;
1385         if (bitnset(M_UDBENVELOPE, e->e_from.q_mailer->m_flags))
1386                 p = e->e_sender;
1387         else
1388                 p = e->e_from.q_paddr;
1389         rpath = remotename(p, m, RF_SENDERADDR|RF_CANONICAL, &rcode, e);
1390         if (strlen(rpath) > MAXSHORTSTR)
1391         {
1392                 rpath = shortenstring(rpath, MAXSHORTSTR);
1393
1394                 /* avoid bogus errno */
1395                 errno = 0;
1396                 syserr("remotename: huge return path %s", rpath);
1397         }
1398         rpath = sm_rpool_strdup_x(e->e_rpool, rpath);
1399         macdefine(&e->e_macro, A_PERM, 'g', rpath);
1400         macdefine(&e->e_macro, A_PERM, 'h', host);
1401         Errors = 0;
1402         pvp = pv;
1403         *pvp++ = m->m_argv[0];
1404
1405         /* ignore long term host status information if mailer flag W is set */
1406         if (bitnset(M_NOHOSTSTAT, m->m_flags))
1407                 IgnoreHostStatus = true;
1408
1409         /* insert -f or -r flag as appropriate */
1410         if (FromFlag &&
1411             (bitnset(M_FOPT, m->m_flags) ||
1412              bitnset(M_ROPT, m->m_flags)))
1413         {
1414                 if (bitnset(M_FOPT, m->m_flags))
1415                         *pvp++ = "-f";
1416                 else
1417                         *pvp++ = "-r";
1418                 *pvp++ = rpath;
1419         }
1420
1421         /*
1422         **  Append the other fixed parts of the argv.  These run
1423         **  up to the first entry containing "$u".  There can only
1424         **  be one of these, and there are only a few more slots
1425         **  in the pv after it.
1426         */
1427
1428         for (mvp = m->m_argv; (p = *++mvp) != NULL; )
1429         {
1430                 /* can't use strchr here because of sign extension problems */
1431                 while (*p != '\0')
1432                 {
1433                         if ((*p++ & 0377) == MACROEXPAND)
1434                         {
1435                                 if (*p == 'u')
1436                                         break;
1437                         }
1438                 }
1439
1440                 if (*p != '\0')
1441                         break;
1442
1443                 /* this entry is safe -- go ahead and process it */
1444                 expand(*mvp, buf, sizeof buf, e);
1445                 *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1446                 if (pvp >= &pv[MAXPV - 3])
1447                 {
1448                         syserr("554 5.3.5 Too many parameters to %s before $u",
1449                                pv[0]);
1450                         rcode = -1;
1451                         goto cleanup;
1452                 }
1453         }
1454
1455         /*
1456         **  If we have no substitution for the user name in the argument
1457         **  list, we know that we must supply the names otherwise -- and
1458         **  SMTP is the answer!!
1459         */
1460
1461         if (*mvp == NULL)
1462         {
1463                 /* running LMTP or SMTP */
1464                 clever = true;
1465                 *pvp = NULL;
1466         }
1467         else if (bitnset(M_LMTP, m->m_flags))
1468         {
1469                 /* not running LMTP */
1470                 sm_syslog(LOG_ERR, NULL,
1471                           "Warning: mailer %s: LMTP flag (F=z) turned off",
1472                           m->m_name);
1473                 clrbitn(M_LMTP, m->m_flags);
1474         }
1475
1476         /*
1477         **  At this point *mvp points to the argument with $u.  We
1478         **  run through our address list and append all the addresses
1479         **  we can.  If we run out of space, do not fret!  We can
1480         **  always send another copy later.
1481         */
1482
1483         e->e_to = NULL;
1484         strsize = 2;
1485         rcptcount = 0;
1486         ctladdr = NULL;
1487         if (firstto->q_signature == NULL)
1488                 firstto->q_signature = hostsignature(firstto->q_mailer,
1489                                                      firstto->q_host);
1490         firstsig = firstto->q_signature;
1491
1492         for (; to != NULL; to = to->q_next)
1493         {
1494                 /* avoid sending multiple recipients to dumb mailers */
1495                 if (tochain != NULL && !bitnset(M_MUSER, m->m_flags))
1496                         break;
1497
1498                 /* if already sent or not for this host, don't send */
1499                 if (!QS_IS_OK(to->q_state)) /* already sent; look at next */
1500                         continue;
1501
1502                 /*
1503                 **  Must be same mailer to keep grouping rcpts.
1504                 **  If mailers don't match: continue; sendqueue is not
1505                 **  sorted by mailers, so don't break;
1506                 */
1507
1508                 if (to->q_mailer != firstto->q_mailer)
1509                         continue;
1510
1511                 if (to->q_signature == NULL) /* for safety */
1512                         to->q_signature = hostsignature(to->q_mailer,
1513                                                         to->q_host);
1514
1515                 /*
1516                 **  This is for coincidental and tailcoat piggybacking messages
1517                 **  to the same mail host. While the signatures are identical
1518                 **  (that's the MX-RR's are identical) we can do coincidental
1519                 **  piggybacking. We try hard for coattail piggybacking
1520                 **  with the same mail host when the next recipient has the
1521                 **  same host at lowest preference. It may be that this
1522                 **  won't work out, so 'skip_back' is maintained if a backup
1523                 **  to coincidental piggybacking or full signature must happen.
1524                 */
1525
1526                 ret = firstto == to ? HS_MATCH_FULL :
1527                                       coloncmp(to->q_signature, firstsig);
1528                 if (ret == HS_MATCH_FULL)
1529                         skip_back = to;
1530                 else if (ret == HS_MATCH_NO)
1531                         break;
1532
1533                 if (!clever)
1534                 {
1535                         /* avoid overflowing tobuf */
1536                         strsize += strlen(to->q_paddr) + 1;
1537                         if (strsize > TOBUFSIZE)
1538                                 break;
1539                 }
1540
1541                 if (++rcptcount > to->q_mailer->m_maxrcpt)
1542                         break;
1543
1544                 if (tTd(10, 1))
1545                 {
1546                         sm_dprintf("\nsend to ");
1547                         printaddr(sm_debug_file(), to, false);
1548                 }
1549
1550                 /* compute effective uid/gid when sending */
1551                 if (bitnset(M_RUNASRCPT, to->q_mailer->m_flags))
1552 # if HASSETUSERCONTEXT
1553                         contextaddr = ctladdr = getctladdr(to);
1554 # else /* HASSETUSERCONTEXT */
1555                         ctladdr = getctladdr(to);
1556 # endif /* HASSETUSERCONTEXT */
1557
1558                 if (tTd(10, 2))
1559                 {
1560                         sm_dprintf("ctladdr=");
1561                         printaddr(sm_debug_file(), ctladdr, false);
1562                 }
1563
1564                 user = to->q_user;
1565                 e->e_to = to->q_paddr;
1566
1567                 /*
1568                 **  Check to see that these people are allowed to
1569                 **  talk to each other.
1570                 **  Check also for overflow of e_msgsize.
1571                 */
1572
1573                 if (m->m_maxsize != 0 &&
1574                     (e->e_msgsize > m->m_maxsize || e->e_msgsize < 0))
1575                 {
1576                         e->e_flags |= EF_NO_BODY_RETN;
1577                         if (bitnset(M_LOCALMAILER, to->q_mailer->m_flags))
1578                                 to->q_status = "5.2.3";
1579                         else
1580                                 to->q_status = "5.3.4";
1581
1582                         /* set to->q_rstatus = NULL; or to the following? */
1583                         usrerrenh(to->q_status,
1584                                   "552 Message is too large; %ld bytes max",
1585                                   m->m_maxsize);
1586                         markfailure(e, to, NULL, EX_UNAVAILABLE, false);
1587                         giveresponse(EX_UNAVAILABLE, to->q_status, m,
1588                                      NULL, ctladdr, xstart, e, to);
1589                         continue;
1590                 }
1591                 SM_SET_H_ERRNO(0);
1592                 ovr = true;
1593
1594                 /* do config file checking of compatibility */
1595                 quarantine = (e->e_quarmsg != NULL);
1596                 rcode = rscheck("check_compat", e->e_from.q_paddr, to->q_paddr,
1597                                 e, RSF_RMCOMM|RSF_COUNT, 3, NULL,
1598                                 e->e_id);
1599                 if (rcode == EX_OK)
1600                 {
1601                         /* do in-code checking if not discarding */
1602                         if (!bitset(EF_DISCARD, e->e_flags))
1603                         {
1604                                 rcode = checkcompat(to, e);
1605                                 ovr = false;
1606                         }
1607                 }
1608                 if (rcode != EX_OK)
1609                 {
1610                         markfailure(e, to, NULL, rcode, ovr);
1611                         giveresponse(rcode, to->q_status, m,
1612                                      NULL, ctladdr, xstart, e, to);
1613                         continue;
1614                 }
1615                 if (!quarantine && e->e_quarmsg != NULL)
1616                 {
1617                         /*
1618                         **  check_compat or checkcompat() has tried
1619                         **  to quarantine but that isn't supported.
1620                         **  Revert the attempt.
1621                         */
1622
1623                         e->e_quarmsg = NULL;
1624                         macdefine(&e->e_macro, A_PERM,
1625                                   macid("{quarantine}"), "");
1626                 }
1627                 if (bitset(EF_DISCARD, e->e_flags))
1628                 {
1629                         if (tTd(10, 5))
1630                         {
1631                                 sm_dprintf("deliver: discarding recipient ");
1632                                 printaddr(sm_debug_file(), to, false);
1633                         }
1634
1635                         /* pretend the message was sent */
1636                         /* XXX should we log something here? */
1637                         to->q_state = QS_DISCARDED;
1638
1639                         /*
1640                         **  Remove discard bit to prevent discard of
1641                         **  future recipients.  This is safe because the
1642                         **  true "global discard" has been handled before
1643                         **  we get here.
1644                         */
1645
1646                         e->e_flags &= ~EF_DISCARD;
1647                         continue;
1648                 }
1649
1650                 /*
1651                 **  Strip quote bits from names if the mailer is dumb
1652                 **      about them.
1653                 */
1654
1655                 if (bitnset(M_STRIPQ, m->m_flags))
1656                 {
1657                         stripquotes(user);
1658                         stripquotes(host);
1659                 }
1660
1661                 /*
1662                 **  Strip all leading backslashes if requested and the
1663                 **  next character is alphanumerical (the latter can
1664                 **  probably relaxed a bit, see RFC2821).
1665                 */
1666
1667                 if (bitnset(M_STRIPBACKSL, m->m_flags) && user[0] == '\\')
1668                         stripbackslash(user);
1669
1670                 /* hack attack -- delivermail compatibility */
1671                 if (m == ProgMailer && *user == '|')
1672                         user++;
1673
1674                 /*
1675                 **  If an error message has already been given, don't
1676                 **      bother to send to this address.
1677                 **
1678                 **      >>>>>>>>>> This clause assumes that the local mailer
1679                 **      >> NOTE >> cannot do any further aliasing; that
1680                 **      >>>>>>>>>> function is subsumed by sendmail.
1681                 */
1682
1683                 if (!QS_IS_OK(to->q_state))
1684                         continue;
1685
1686                 /*
1687                 **  See if this user name is "special".
1688                 **      If the user name has a slash in it, assume that this
1689                 **      is a file -- send it off without further ado.  Note
1690                 **      that this type of addresses is not processed along
1691                 **      with the others, so we fudge on the To person.
1692                 */
1693
1694                 if (strcmp(m->m_mailer, "[FILE]") == 0)
1695                 {
1696                         macdefine(&e->e_macro, A_PERM, 'u', user);
1697                         p = to->q_home;
1698                         if (p == NULL && ctladdr != NULL)
1699                                 p = ctladdr->q_home;
1700                         macdefine(&e->e_macro, A_PERM, 'z', p);
1701                         expand(m->m_argv[1], buf, sizeof buf, e);
1702                         if (strlen(buf) > 0)
1703                                 rcode = mailfile(buf, m, ctladdr, SFF_CREAT, e);
1704                         else
1705                         {
1706                                 syserr("empty filename specification for mailer %s",
1707                                        m->m_name);
1708                                 rcode = EX_CONFIG;
1709                         }
1710                         giveresponse(rcode, to->q_status, m, NULL,
1711                                      ctladdr, xstart, e, to);
1712                         markfailure(e, to, NULL, rcode, true);
1713                         e->e_nsent++;
1714                         if (rcode == EX_OK)
1715                         {
1716                                 to->q_state = QS_SENT;
1717                                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
1718                                     bitset(QPINGONSUCCESS, to->q_flags))
1719                                 {
1720                                         to->q_flags |= QDELIVERED;
1721                                         to->q_status = "2.1.5";
1722                                         (void) sm_io_fprintf(e->e_xfp,
1723                                                              SM_TIME_DEFAULT,
1724                                                              "%s... Successfully delivered\n",
1725                                                              to->q_paddr);
1726                                 }
1727                         }
1728                         to->q_statdate = curtime();
1729                         markstats(e, to, STATS_NORMAL);
1730                         continue;
1731                 }
1732
1733                 /*
1734                 **  Address is verified -- add this user to mailer
1735                 **  argv, and add it to the print list of recipients.
1736                 */
1737
1738                 /* link together the chain of recipients */
1739                 to->q_tchain = tochain;
1740                 tochain = to;
1741                 e->e_to = "[CHAIN]";
1742
1743                 macdefine(&e->e_macro, A_PERM, 'u', user);  /* to user */
1744                 p = to->q_home;
1745                 if (p == NULL && ctladdr != NULL)
1746                         p = ctladdr->q_home;
1747                 macdefine(&e->e_macro, A_PERM, 'z', p);  /* user's home */
1748
1749                 /* set the ${dsn_notify} macro if applicable */
1750                 if (bitset(QHASNOTIFY, to->q_flags))
1751                 {
1752                         char notify[MAXLINE];
1753
1754                         notify[0] = '\0';
1755                         if (bitset(QPINGONSUCCESS, to->q_flags))
1756                                 (void) sm_strlcat(notify, "SUCCESS,",
1757                                                   sizeof notify);
1758                         if (bitset(QPINGONFAILURE, to->q_flags))
1759                                 (void) sm_strlcat(notify, "FAILURE,",
1760                                                   sizeof notify);
1761                         if (bitset(QPINGONDELAY, to->q_flags))
1762                                 (void) sm_strlcat(notify, "DELAY,",
1763                                                   sizeof notify);
1764
1765                         /* Set to NEVER or drop trailing comma */
1766                         if (notify[0] == '\0')
1767                                 (void) sm_strlcat(notify, "NEVER",
1768                                                   sizeof notify);
1769                         else
1770                                 notify[strlen(notify) - 1] = '\0';
1771
1772                         macdefine(&e->e_macro, A_TEMP,
1773                                 macid("{dsn_notify}"), notify);
1774                 }
1775                 else
1776                         macdefine(&e->e_macro, A_PERM,
1777                                 macid("{dsn_notify}"), NULL);
1778
1779                 /*
1780                 **  Expand out this user into argument list.
1781                 */
1782
1783                 if (!clever)
1784                 {
1785                         expand(*mvp, buf, sizeof buf, e);
1786                         *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1787                         if (pvp >= &pv[MAXPV - 2])
1788                         {
1789                                 /* allow some space for trailing parms */
1790                                 break;
1791                         }
1792                 }
1793         }
1794
1795         /* see if any addresses still exist */
1796         if (tochain == NULL)
1797         {
1798                 rcode = 0;
1799                 goto cleanup;
1800         }
1801
1802         /* print out messages as full list */
1803         strsize = 1;
1804         for (to = tochain; to != NULL; to = to->q_tchain)
1805                 strsize += strlen(to->q_paddr) + 1;
1806         if (strsize < TOBUFSIZE)
1807                 strsize = TOBUFSIZE;
1808         if (strsize > tobufsize)
1809         {
1810                 SM_FREE_CLR(tobuf);
1811                 tobuf = sm_pmalloc_x(strsize);
1812                 tobufsize = strsize;
1813         }
1814         p = tobuf;
1815         *p = '\0';
1816         for (to = tochain; to != NULL; to = to->q_tchain)
1817         {
1818                 (void) sm_strlcpyn(p, tobufsize - (p - tobuf), 2,
1819                                    ",", to->q_paddr);
1820                 p += strlen(p);
1821         }
1822         e->e_to = tobuf + 1;
1823
1824         /*
1825         **  Fill out any parameters after the $u parameter.
1826         */
1827
1828         if (!clever)
1829         {
1830                 while (*++mvp != NULL)
1831                 {
1832                         expand(*mvp, buf, sizeof buf, e);
1833                         *pvp++ = sm_rpool_strdup_x(e->e_rpool, buf);
1834                         if (pvp >= &pv[MAXPV])
1835                                 syserr("554 5.3.0 deliver: pv overflow after $u for %s",
1836                                        pv[0]);
1837                 }
1838         }
1839         *pvp++ = NULL;
1840
1841         /*
1842         **  Call the mailer.
1843         **      The argument vector gets built, pipes
1844         **      are created as necessary, and we fork & exec as
1845         **      appropriate.
1846         **      If we are running SMTP, we just need to clean up.
1847         */
1848
1849         /* XXX this seems a bit wierd */
1850         if (ctladdr == NULL && m != ProgMailer && m != FileMailer &&
1851             bitset(QGOODUID, e->e_from.q_flags))
1852                 ctladdr = &e->e_from;
1853
1854 #if NAMED_BIND
1855         if (ConfigLevel < 2)
1856                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
1857 #endif /* NAMED_BIND */
1858
1859         if (tTd(11, 1))
1860         {
1861                 sm_dprintf("openmailer:");
1862                 printav(sm_debug_file(), pv);
1863         }
1864         errno = 0;
1865         SM_SET_H_ERRNO(0);
1866         CurHostName = NULL;
1867
1868         /*
1869         **  Deal with the special case of mail handled through an IPC
1870         **  connection.
1871         **      In this case we don't actually fork.  We must be
1872         **      running SMTP for this to work.  We will return a
1873         **      zero pid to indicate that we are running IPC.
1874         **  We also handle a debug version that just talks to stdin/out.
1875         */
1876
1877         curhost = NULL;
1878         SmtpPhase = NULL;
1879         mci = NULL;
1880
1881 #if XDEBUG
1882         {
1883                 char wbuf[MAXLINE];
1884
1885                 /* make absolutely certain 0, 1, and 2 are in use */
1886                 (void) sm_snprintf(wbuf, sizeof wbuf, "%s... openmailer(%s)",
1887                                    shortenstring(e->e_to, MAXSHORTSTR),
1888                                    m->m_name);
1889                 checkfd012(wbuf);
1890         }
1891 #endif /* XDEBUG */
1892
1893         /* check for 8-bit available */
1894         if (bitset(EF_HAS8BIT, e->e_flags) &&
1895             bitnset(M_7BITS, m->m_flags) &&
1896             (bitset(EF_DONT_MIME, e->e_flags) ||
1897              !(bitset(MM_MIME8BIT, MimeMode) ||
1898                (bitset(EF_IS_MIME, e->e_flags) &&
1899                 bitset(MM_CVTMIME, MimeMode)))))
1900         {
1901                 e->e_status = "5.6.3";
1902                 usrerrenh(e->e_status,
1903                           "554 Cannot send 8-bit data to 7-bit destination");
1904                 rcode = EX_DATAERR;
1905                 goto give_up;
1906         }
1907
1908         if (tTd(62, 8))
1909                 checkfds("before delivery");
1910
1911         /* check for Local Person Communication -- not for mortals!!! */
1912         if (strcmp(m->m_mailer, "[LPC]") == 0)
1913         {
1914                 if (clever)
1915                 {
1916                         /* flush any expired connections */
1917                         (void) mci_scan(NULL);
1918
1919                         /* try to get a cached connection or just a slot */
1920                         mci = mci_get(m->m_name, m);
1921                         if (mci->mci_host == NULL)
1922                                 mci->mci_host = m->m_name;
1923                         CurHostName = mci->mci_host;
1924                         if (mci->mci_state != MCIS_CLOSED)
1925                         {
1926                                 message("Using cached SMTP/LPC connection for %s...",
1927                                         m->m_name);
1928                                 mci->mci_deliveries++;
1929                                 goto do_transfer;
1930                         }
1931                 }
1932                 else
1933                 {
1934                         mci = mci_new(e->e_rpool);
1935                 }
1936                 mci->mci_in = smioin;
1937                 mci->mci_out = smioout;
1938                 mci->mci_mailer = m;
1939                 mci->mci_host = m->m_name;
1940                 if (clever)
1941                 {
1942                         mci->mci_state = MCIS_OPENING;
1943                         mci_cache(mci);
1944                 }
1945                 else
1946                         mci->mci_state = MCIS_OPEN;
1947         }
1948         else if (strcmp(m->m_mailer, "[IPC]") == 0)
1949         {
1950                 register int i;
1951
1952                 if (pv[0] == NULL || pv[1] == NULL || pv[1][0] == '\0')
1953                 {
1954                         syserr("null destination for %s mailer", m->m_mailer);
1955                         rcode = EX_CONFIG;
1956                         goto give_up;
1957                 }
1958
1959 # if NETUNIX
1960                 if (strcmp(pv[0], "FILE") == 0)
1961                 {
1962                         curhost = CurHostName = "localhost";
1963                         mux_path = pv[1];
1964                 }
1965                 else
1966 # endif /* NETUNIX */
1967                 {
1968                         CurHostName = pv[1];
1969                         curhost = hostsignature(m, pv[1]);
1970                 }
1971
1972                 if (curhost == NULL || curhost[0] == '\0')
1973                 {
1974                         syserr("null host signature for %s", pv[1]);
1975                         rcode = EX_CONFIG;
1976                         goto give_up;
1977                 }
1978
1979                 if (!clever)
1980                 {
1981                         syserr("554 5.3.5 non-clever IPC");
1982                         rcode = EX_CONFIG;
1983                         goto give_up;
1984                 }
1985                 if (pv[2] != NULL
1986 # if NETUNIX
1987                     && mux_path == NULL
1988 # endif /* NETUNIX */
1989                     )
1990                 {
1991                         port = htons((unsigned short) atoi(pv[2]));
1992                         if (port == 0)
1993                         {
1994 # ifdef NO_GETSERVBYNAME
1995                                 syserr("Invalid port number: %s", pv[2]);
1996 # else /* NO_GETSERVBYNAME */
1997                                 struct servent *sp = getservbyname(pv[2], "tcp");
1998
1999                                 if (sp == NULL)
2000                                         syserr("Service %s unknown", pv[2]);
2001                                 else
2002                                         port = sp->s_port;
2003 # endif /* NO_GETSERVBYNAME */
2004                         }
2005                 }
2006
2007                 nummxhosts = parse_hostsignature(curhost, mxhosts, m);
2008                 if (TimeOuts.to_aconnect > 0)
2009                         enough = curtime() + TimeOuts.to_aconnect;
2010 tryhost:
2011                 while (hostnum < nummxhosts)
2012                 {
2013                         char sep = ':';
2014                         char *endp;
2015                         static char hostbuf[MAXNAME + 1];
2016                         bool tried_fallbacksmarthost = false;
2017
2018 # if NETINET6
2019                         if (*mxhosts[hostnum] == '[')
2020                         {
2021                                 endp = strchr(mxhosts[hostnum] + 1, ']');
2022                                 if (endp != NULL)
2023                                         endp = strpbrk(endp + 1, ":,");
2024                         }
2025                         else
2026                                 endp = strpbrk(mxhosts[hostnum], ":,");
2027 # else /* NETINET6 */
2028                         endp = strpbrk(mxhosts[hostnum], ":,");
2029 # endif /* NETINET6 */
2030                         if (endp != NULL)
2031                         {
2032                                 sep = *endp;
2033                                 *endp = '\0';
2034                         }
2035
2036                         if (hostnum == 1 && skip_back != NULL)
2037                         {
2038                                 /*
2039                                 **  Coattail piggybacking is no longer an
2040                                 **  option with the mail host next to be tried
2041                                 **  no longer the lowest MX preference
2042                                 **  (hostnum == 1 meaning we're on the second
2043                                 **  preference). We do not try to coattail
2044                                 **  piggyback more than the first MX preference.
2045                                 **  Revert 'tochain' to last location for
2046                                 **  coincidental piggybacking. This works this
2047                                 **  easily because the q_tchain kept getting
2048                                 **  added to the top of the linked list.
2049                                 */
2050
2051                                 tochain = skip_back;
2052                         }
2053
2054                         if (*mxhosts[hostnum] == '\0')
2055                         {
2056                                 syserr("deliver: null host name in signature");
2057                                 hostnum++;
2058                                 if (endp != NULL)
2059                                         *endp = sep;
2060                                 continue;
2061                         }
2062                         (void) sm_strlcpy(hostbuf, mxhosts[hostnum],
2063                                           sizeof hostbuf);
2064                         hostnum++;
2065                         if (endp != NULL)
2066                                 *endp = sep;
2067
2068   one_last_try:
2069                         /* see if we already know that this host is fried */
2070                         CurHostName = hostbuf;
2071                         mci = mci_get(hostbuf, m);
2072                         if (mci->mci_state != MCIS_CLOSED)
2073                         {
2074                                 char *type;
2075
2076                                 if (tTd(11, 1))
2077                                 {
2078                                         sm_dprintf("openmailer: ");
2079                                         mci_dump(sm_debug_file(), mci, false);
2080                                 }
2081                                 CurHostName = mci->mci_host;
2082                                 if (bitnset(M_LMTP, m->m_flags))
2083                                         type = "L";
2084                                 else if (bitset(MCIF_ESMTP, mci->mci_flags))
2085                                         type = "ES";
2086                                 else
2087                                         type = "S";
2088                                 message("Using cached %sMTP connection to %s via %s...",
2089                                         type, hostbuf, m->m_name);
2090                                 mci->mci_deliveries++;
2091                                 break;
2092                         }
2093                         mci->mci_mailer = m;
2094                         if (mci->mci_exitstat != EX_OK)
2095                         {
2096                                 if (mci->mci_exitstat == EX_TEMPFAIL)
2097                                         goodmxfound = true;
2098
2099                                 /* Try FallbackSmartHost? */
2100                                 if (should_try_fbsh(e, &tried_fallbacksmarthost,
2101                                                     hostbuf, sizeof hostbuf,
2102                                                     mci->mci_exitstat))
2103                                         goto one_last_try;
2104
2105                                 continue;
2106                         }
2107
2108                         if (mci_lock_host(mci) != EX_OK)
2109                         {
2110                                 mci_setstat(mci, EX_TEMPFAIL, "4.4.5", NULL);
2111                                 goodmxfound = true;
2112                                 continue;
2113                         }
2114
2115                         /* try the connection */
2116                         sm_setproctitle(true, e, "%s %s: %s",
2117                                         qid_printname(e),
2118                                         hostbuf, "user open");
2119 # if NETUNIX
2120                         if (mux_path != NULL)
2121                         {
2122                                 message("Connecting to %s via %s...",
2123                                         mux_path, m->m_name);
2124                                 i = makeconnection_ds((char *) mux_path, mci);
2125                         }
2126                         else
2127 # endif /* NETUNIX */
2128                         {
2129                                 if (port == 0)
2130                                         message("Connecting to %s via %s...",
2131                                                 hostbuf, m->m_name);
2132                                 else
2133                                         message("Connecting to %s port %d via %s...",
2134                                                 hostbuf, ntohs(port),
2135                                                 m->m_name);
2136                                 i = makeconnection(hostbuf, port, mci, e,
2137                                                    enough);
2138                         }
2139                         mci->mci_errno = errno;
2140                         mci->mci_lastuse = curtime();
2141                         mci->mci_deliveries = 0;
2142                         mci->mci_exitstat = i;
2143 # if NAMED_BIND
2144                         mci->mci_herrno = h_errno;
2145 # endif /* NAMED_BIND */
2146
2147                         /*
2148                         **  Have we tried long enough to get a connection?
2149                         **      If yes, skip to the fallback MX hosts
2150                         **      (if existent).
2151                         */
2152
2153                         if (enough > 0 && mci->mci_lastuse >= enough)
2154                         {
2155                                 int h;
2156 # if NAMED_BIND
2157                                 extern int NumFallbackMXHosts;
2158 # else /* NAMED_BIND */
2159                                 const int NumFallbackMXHosts = 0;
2160 # endif /* NAMED_BIND */
2161
2162                                 if (hostnum < nummxhosts && LogLevel > 9)
2163                                         sm_syslog(LOG_INFO, e->e_id,
2164                                                   "Timeout.to_aconnect occurred before exhausting all addresses");
2165
2166                                 /* turn off timeout if fallback available */
2167                                 if (NumFallbackMXHosts > 0)
2168                                         enough = 0;
2169
2170                                 /* skip to a fallback MX host */
2171                                 h = nummxhosts - NumFallbackMXHosts;
2172                                 if (hostnum < h)
2173                                         hostnum = h;
2174                         }
2175                         if (i == EX_OK)
2176                         {
2177                                 goodmxfound = true;
2178                                 markstats(e, firstto, STATS_CONNECT);
2179                                 mci->mci_state = MCIS_OPENING;
2180                                 mci_cache(mci);
2181                                 if (TrafficLogFile != NULL)
2182                                         (void) sm_io_fprintf(TrafficLogFile,
2183                                                              SM_TIME_DEFAULT,
2184                                                              "%05d === CONNECT %s\n",
2185                                                              (int) CurrentPid,
2186                                                              hostbuf);
2187                                 break;
2188                         }
2189                         else
2190                         {
2191                                 /* Try FallbackSmartHost? */
2192                                 if (should_try_fbsh(e, &tried_fallbacksmarthost,
2193                                                     hostbuf, sizeof hostbuf, i))
2194                                         goto one_last_try;
2195
2196                                 if (tTd(11, 1))
2197                                         sm_dprintf("openmailer: makeconnection => stat=%d, errno=%d\n",
2198                                                    i, errno);
2199                                 if (i == EX_TEMPFAIL)
2200                                         goodmxfound = true;
2201                                 mci_unlock_host(mci);
2202                         }
2203
2204                         /* enter status of this host */
2205                         setstat(i);
2206
2207                         /* should print some message here for -v mode */
2208                 }
2209                 if (mci == NULL)
2210                 {
2211                         syserr("deliver: no host name");
2212                         rcode = EX_SOFTWARE;
2213                         goto give_up;
2214                 }
2215                 mci->mci_pid = 0;
2216         }
2217         else
2218         {
2219                 /* flush any expired connections */
2220                 (void) mci_scan(NULL);
2221                 mci = NULL;
2222
2223                 if (bitnset(M_LMTP, m->m_flags))
2224                 {
2225                         /* try to get a cached connection */
2226                         mci = mci_get(m->m_name, m);
2227                         if (mci->mci_host == NULL)
2228                                 mci->mci_host = m->m_name;
2229                         CurHostName = mci->mci_host;
2230                         if (mci->mci_state != MCIS_CLOSED)
2231                         {
2232                                 message("Using cached LMTP connection for %s...",
2233                                         m->m_name);
2234                                 mci->mci_deliveries++;
2235                                 goto do_transfer;
2236                         }
2237                 }
2238
2239                 /* announce the connection to verbose listeners */
2240                 if (host == NULL || host[0] == '\0')
2241                         message("Connecting to %s...", m->m_name);
2242                 else
2243                         message("Connecting to %s via %s...", host, m->m_name);
2244                 if (TrafficLogFile != NULL)
2245                 {
2246                         char **av;
2247
2248                         (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
2249                                              "%05d === EXEC", (int) CurrentPid);
2250                         for (av = pv; *av != NULL; av++)
2251                                 (void) sm_io_fprintf(TrafficLogFile,
2252                                                      SM_TIME_DEFAULT, " %s",
2253                                                      *av);
2254                         (void) sm_io_fprintf(TrafficLogFile, SM_TIME_DEFAULT,
2255                                              "\n");
2256                 }
2257
2258 #if XDEBUG
2259                 checkfd012("before creating mail pipe");
2260 #endif /* XDEBUG */
2261
2262                 /* create a pipe to shove the mail through */
2263                 if (pipe(mpvect) < 0)
2264                 {
2265                         syserr("%s... openmailer(%s): pipe (to mailer)",
2266                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name);
2267                         if (tTd(11, 1))
2268                                 sm_dprintf("openmailer: NULL\n");
2269                         rcode = EX_OSERR;
2270                         goto give_up;
2271                 }
2272
2273 #if XDEBUG
2274                 /* make sure we didn't get one of the standard I/O files */
2275                 if (mpvect[0] < 3 || mpvect[1] < 3)
2276                 {
2277                         syserr("%s... openmailer(%s): bogus mpvect %d %d",
2278                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name,
2279                                mpvect[0], mpvect[1]);
2280                         printopenfds(true);
2281                         if (tTd(11, 1))
2282                                 sm_dprintf("openmailer: NULL\n");
2283                         rcode = EX_OSERR;
2284                         goto give_up;
2285                 }
2286
2287                 /* make sure system call isn't dead meat */
2288                 checkfdopen(mpvect[0], "mpvect[0]");
2289                 checkfdopen(mpvect[1], "mpvect[1]");
2290                 if (mpvect[0] == mpvect[1] ||
2291                     (e->e_lockfp != NULL &&
2292                      (mpvect[0] == sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD,
2293                                                  NULL) ||
2294                       mpvect[1] == sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD,
2295                                                  NULL))))
2296                 {
2297                         if (e->e_lockfp == NULL)
2298                                 syserr("%s... openmailer(%s): overlapping mpvect %d %d",
2299                                        shortenstring(e->e_to, MAXSHORTSTR),
2300                                        m->m_name, mpvect[0], mpvect[1]);
2301                         else
2302                                 syserr("%s... openmailer(%s): overlapping mpvect %d %d, lockfp = %d",
2303                                        shortenstring(e->e_to, MAXSHORTSTR),
2304                                        m->m_name, mpvect[0], mpvect[1],
2305                                        sm_io_getinfo(e->e_lockfp,
2306                                                      SM_IO_WHAT_FD, NULL));
2307                 }
2308 #endif /* XDEBUG */
2309
2310                 /* create a return pipe */
2311                 if (pipe(rpvect) < 0)
2312                 {
2313                         syserr("%s... openmailer(%s): pipe (from mailer)",
2314                                shortenstring(e->e_to, MAXSHORTSTR),
2315                                m->m_name);
2316                         (void) close(mpvect[0]);
2317                         (void) close(mpvect[1]);
2318                         if (tTd(11, 1))
2319                                 sm_dprintf("openmailer: NULL\n");
2320                         rcode = EX_OSERR;
2321                         goto give_up;
2322                 }
2323 #if XDEBUG
2324                 checkfdopen(rpvect[0], "rpvect[0]");
2325                 checkfdopen(rpvect[1], "rpvect[1]");
2326 #endif /* XDEBUG */
2327
2328                 /*
2329                 **  Actually fork the mailer process.
2330                 **      DOFORK is clever about retrying.
2331                 **
2332                 **      Dispose of SIGCHLD signal catchers that may be laying
2333                 **      around so that endmailer will get it.
2334                 */
2335
2336                 if (e->e_xfp != NULL)   /* for debugging */
2337                         (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
2338                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
2339                 (void) sm_signal(SIGCHLD, SIG_DFL);
2340
2341
2342                 DOFORK(FORK);
2343                 /* pid is set by DOFORK */
2344
2345                 if (pid < 0)
2346                 {
2347                         /* failure */
2348                         syserr("%s... openmailer(%s): cannot fork",
2349                                shortenstring(e->e_to, MAXSHORTSTR), m->m_name);
2350                         (void) close(mpvect[0]);
2351                         (void) close(mpvect[1]);
2352                         (void) close(rpvect[0]);
2353                         (void) close(rpvect[1]);
2354                         if (tTd(11, 1))
2355                                 sm_dprintf("openmailer: NULL\n");
2356                         rcode = EX_OSERR;
2357                         goto give_up;
2358                 }
2359                 else if (pid == 0)
2360                 {
2361                         int save_errno;
2362                         int sff;
2363                         int new_euid = NO_UID;
2364                         int new_ruid = NO_UID;
2365                         int new_gid = NO_GID;
2366                         char *user = NULL;
2367                         struct stat stb;
2368                         extern int DtableSize;
2369
2370                         CurrentPid = getpid();
2371
2372                         /* clear the events to turn off SIGALRMs */
2373                         sm_clear_events();
2374
2375                         /* Reset global flags */
2376                         RestartRequest = NULL;
2377                         RestartWorkGroup = false;
2378                         ShutdownRequest = NULL;
2379                         PendingSignal = 0;
2380
2381                         if (e->e_lockfp != NULL)
2382                                 (void) close(sm_io_getinfo(e->e_lockfp,
2383                                                            SM_IO_WHAT_FD,
2384                                                            NULL));
2385
2386                         /* child -- set up input & exec mailer */
2387                         (void) sm_signal(SIGALRM, sm_signal_noop);
2388                         (void) sm_signal(SIGCHLD, SIG_DFL);
2389                         (void) sm_signal(SIGHUP, SIG_IGN);
2390                         (void) sm_signal(SIGINT, SIG_IGN);
2391                         (void) sm_signal(SIGTERM, SIG_DFL);
2392 # ifdef SIGUSR1
2393                         (void) sm_signal(SIGUSR1, sm_signal_noop);
2394 # endif /* SIGUSR1 */
2395
2396                         if (m != FileMailer || stat(tochain->q_user, &stb) < 0)
2397                                 stb.st_mode = 0;
2398
2399 # if HASSETUSERCONTEXT
2400                         /*
2401                         **  Set user resources.
2402                         */
2403
2404                         if (contextaddr != NULL)
2405                         {
2406                                 int sucflags;
2407                                 struct passwd *pwd;
2408
2409                                 if (contextaddr->q_ruser != NULL)
2410                                         pwd = sm_getpwnam(contextaddr->q_ruser);
2411                                 else
2412                                         pwd = sm_getpwnam(contextaddr->q_user);
2413                                 sucflags = LOGIN_SETRESOURCES|LOGIN_SETPRIORITY;
2414 #ifdef LOGIN_SETMAC
2415                                 sucflags |= LOGIN_SETMAC;
2416 #endif /* LOGIN_SETMAC */
2417                                 if (pwd != NULL &&
2418                                     setusercontext(NULL, pwd, pwd->pw_uid,
2419                                                    sucflags) == -1 &&
2420                                     suidwarn)
2421                                 {
2422                                         syserr("openmailer: setusercontext() failed");
2423                                         exit(EX_TEMPFAIL);
2424                                 }
2425                         }
2426 # endif /* HASSETUSERCONTEXT */
2427
2428 #if HASNICE
2429                         /* tweak niceness */
2430                         if (m->m_nice != 0)
2431                                 (void) nice(m->m_nice);
2432 #endif /* HASNICE */
2433
2434                         /* reset group id */
2435                         if (bitnset(M_SPECIFIC_UID, m->m_flags))
2436                         {
2437                                 if (m->m_gid == NO_GID)
2438                                         new_gid = RunAsGid;
2439                                 else
2440                                         new_gid = m->m_gid;
2441                         }
2442                         else if (bitset(S_ISGID, stb.st_mode))
2443                                 new_gid = stb.st_gid;
2444                         else if (ctladdr != NULL && ctladdr->q_gid != 0)
2445                         {
2446                                 if (!DontInitGroups)
2447                                 {
2448                                         user = ctladdr->q_ruser;
2449                                         if (user == NULL)
2450                                                 user = ctladdr->q_user;
2451
2452                                         if (initgroups(user,
2453                                                        ctladdr->q_gid) == -1
2454                                             && suidwarn)
2455                                         {
2456                                                 syserr("openmailer: initgroups(%s, %d) failed",
2457                                                         user, ctladdr->q_gid);
2458                                                 exit(EX_TEMPFAIL);
2459                                         }
2460                                 }
2461                                 else
2462                                 {
2463                                         GIDSET_T gidset[1];
2464
2465                                         gidset[0] = ctladdr->q_gid;
2466                                         if (setgroups(1, gidset) == -1
2467                                             && suidwarn)
2468                                         {
2469                                                 syserr("openmailer: setgroups() failed");
2470                                                 exit(EX_TEMPFAIL);
2471                                         }
2472                                 }
2473                                 new_gid = ctladdr->q_gid;
2474                         }
2475                         else
2476                         {
2477                                 if (!DontInitGroups)
2478                                 {
2479                                         user = DefUser;
2480                                         if (initgroups(DefUser, DefGid) == -1 &&
2481                                             suidwarn)
2482                                         {
2483                                                 syserr("openmailer: initgroups(%s, %d) failed",
2484                                                        DefUser, DefGid);
2485                                                 exit(EX_TEMPFAIL);
2486                                         }
2487                                 }
2488                                 else
2489                                 {
2490                                         GIDSET_T gidset[1];
2491
2492                                         gidset[0] = DefGid;
2493                                         if (setgroups(1, gidset) == -1
2494                                             && suidwarn)
2495                                         {
2496                                                 syserr("openmailer: setgroups() failed");
2497                                                 exit(EX_TEMPFAIL);
2498                                         }
2499                                 }
2500                                 if (m->m_gid == NO_GID)
2501                                         new_gid = DefGid;
2502                                 else
2503                                         new_gid = m->m_gid;
2504                         }
2505                         if (new_gid != NO_GID)
2506                         {
2507                                 if (RunAsUid != 0 &&
2508                                     bitnset(M_SPECIFIC_UID, m->m_flags) &&
2509                                     new_gid != getgid() &&
2510                                     new_gid != getegid())
2511                                 {
2512                                         /* Only root can change the gid */
2513                                         syserr("openmailer: insufficient privileges to change gid, RunAsUid=%d, new_gid=%d, gid=%d, egid=%d",
2514                                                (int) RunAsUid, (int) new_gid,
2515                                                (int) getgid(), (int) getegid());
2516                                         exit(EX_TEMPFAIL);
2517                                 }
2518
2519                                 if (setgid(new_gid) < 0 && suidwarn)
2520                                 {
2521                                         syserr("openmailer: setgid(%ld) failed",
2522                                                (long) new_gid);
2523                                         exit(EX_TEMPFAIL);
2524                                 }
2525                         }
2526
2527                         /* change root to some "safe" directory */
2528                         if (m->m_rootdir != NULL)
2529                         {
2530                                 expand(m->m_rootdir, cbuf, sizeof cbuf, e);
2531                                 if (tTd(11, 20))
2532                                         sm_dprintf("openmailer: chroot %s\n",
2533                                                    cbuf);
2534                                 if (chroot(cbuf) < 0)
2535                                 {
2536                                         syserr("openmailer: Cannot chroot(%s)",
2537                                                cbuf);
2538                                         exit(EX_TEMPFAIL);
2539                                 }
2540                                 if (chdir("/") < 0)
2541                                 {
2542                                         syserr("openmailer: cannot chdir(/)");
2543                                         exit(EX_TEMPFAIL);
2544                                 }
2545                         }
2546
2547                         /* reset user id */
2548                         endpwent();
2549                         sm_mbdb_terminate();
2550                         if (bitnset(M_SPECIFIC_UID, m->m_flags))
2551                         {
2552                                 if (m->m_uid == NO_UID)
2553                                         new_euid = RunAsUid;
2554                                 else
2555                                         new_euid = m->m_uid;
2556
2557                                 /*
2558                                 **  Undo the effects of the uid change in main
2559                                 **  for signal handling.  The real uid may
2560                                 **  be used by mailer in adding a "From "
2561                                 **  line.
2562                                 */
2563
2564                                 if (RealUid != 0 && RealUid != getuid())
2565                                 {
2566 # if MAILER_SETUID_METHOD == USE_SETEUID
2567 #  if HASSETREUID
2568                                         if (setreuid(RealUid, geteuid()) < 0)
2569                                         {
2570                                                 syserr("openmailer: setreuid(%d, %d) failed",
2571                                                        (int) RealUid, (int) geteuid());
2572                                                 exit(EX_OSERR);
2573                                         }
2574 #  endif /* HASSETREUID */
2575 # endif /* MAILER_SETUID_METHOD == USE_SETEUID */
2576 # if MAILER_SETUID_METHOD == USE_SETREUID
2577                                         new_ruid = RealUid;
2578 # endif /* MAILER_SETUID_METHOD == USE_SETREUID */
2579                                 }
2580                         }
2581                         else if (bitset(S_ISUID, stb.st_mode))
2582                                 new_ruid = stb.st_uid;
2583                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
2584                                 new_ruid = ctladdr->q_uid;
2585                         else if (m->m_uid != NO_UID)
2586                                 new_ruid = m->m_uid;
2587                         else
2588                                 new_ruid = DefUid;
2589
2590 # if _FFR_USE_SETLOGIN
2591                         /* run disconnected from terminal and set login name */
2592                         if (setsid() >= 0 &&
2593                             ctladdr != NULL && ctladdr->q_uid != 0 &&
2594                             new_euid == ctladdr->q_uid)
2595                         {
2596                                 struct passwd *pwd;
2597
2598                                 pwd = sm_getpwuid(ctladdr->q_uid);
2599                                 if (pwd != NULL && suidwarn)
2600                                         (void) setlogin(pwd->pw_name);
2601                                 endpwent();
2602                         }
2603 # endif /* _FFR_USE_SETLOGIN */
2604
2605                         if (new_euid != NO_UID)
2606                         {
2607                                 if (RunAsUid != 0 && new_euid != RunAsUid)
2608                                 {
2609                                         /* Only root can change the uid */
2610                                         syserr("openmailer: insufficient privileges to change uid, new_euid=%d, RunAsUid=%d",
2611                                                (int) new_euid, (int) RunAsUid);
2612                                         exit(EX_TEMPFAIL);
2613                                 }
2614
2615                                 vendor_set_uid(new_euid);
2616 # if MAILER_SETUID_METHOD == USE_SETEUID
2617                                 if (seteuid(new_euid) < 0 && suidwarn)
2618                                 {
2619                                         syserr("openmailer: seteuid(%ld) failed",
2620                                                (long) new_euid);
2621                                         exit(EX_TEMPFAIL);
2622                                 }
2623 # endif /* MAILER_SETUID_METHOD == USE_SETEUID */
2624 # if MAILER_SETUID_METHOD == USE_SETREUID
2625                                 if (setreuid(new_ruid, new_euid) < 0 && suidwarn)
2626                                 {
2627                                         syserr("openmailer: setreuid(%ld, %ld) failed",
2628                                                (long) new_ruid, (long) new_euid);
2629                                         exit(EX_TEMPFAIL);
2630                                 }
2631 # endif /* MAILER_SETUID_METHOD == USE_SETREUID */
2632 # if MAILER_SETUID_METHOD == USE_SETUID
2633                                 if (new_euid != geteuid() && setuid(new_euid) < 0 && suidwarn)
2634                                 {
2635                                         syserr("openmailer: setuid(%ld) failed",
2636                                                (long) new_euid);
2637                                         exit(EX_TEMPFAIL);
2638                                 }
2639 # endif /* MAILER_SETUID_METHOD == USE_SETUID */
2640                         }
2641                         else if (new_ruid != NO_UID)
2642                         {
2643                                 vendor_set_uid(new_ruid);
2644                                 if (setuid(new_ruid) < 0 && suidwarn)
2645                                 {
2646                                         syserr("openmailer: setuid(%ld) failed",
2647                                                (long) new_ruid);
2648                                         exit(EX_TEMPFAIL);
2649                                 }
2650                         }
2651
2652                         if (tTd(11, 2))
2653                                 sm_dprintf("openmailer: running as r/euid=%d/%d, r/egid=%d/%d\n",
2654                                            (int) getuid(), (int) geteuid(),
2655                                            (int) getgid(), (int) getegid());
2656
2657                         /* move into some "safe" directory */
2658                         if (m->m_execdir != NULL)
2659                         {
2660                                 char *q;
2661
2662                                 for (p = m->m_execdir; p != NULL; p = q)
2663                                 {
2664                                         q = strchr(p, ':');
2665                                         if (q != NULL)
2666                                                 *q = '\0';
2667                                         expand(p, cbuf, sizeof cbuf, e);
2668                                         if (q != NULL)
2669                                                 *q++ = ':';
2670                                         if (tTd(11, 20))
2671                                                 sm_dprintf("openmailer: trydir %s\n",
2672                                                            cbuf);
2673                                         if (cbuf[0] != '\0' &&
2674                                             chdir(cbuf) >= 0)
2675                                                 break;
2676                                 }
2677                         }
2678
2679                         /* Check safety of program to be run */
2680                         sff = SFF_ROOTOK|SFF_EXECOK;
2681                         if (!bitnset(DBS_RUNWRITABLEPROGRAM,
2682                                      DontBlameSendmail))
2683                                 sff |= SFF_NOGWFILES|SFF_NOWWFILES;
2684                         if (bitnset(DBS_RUNPROGRAMINUNSAFEDIRPATH,
2685                                     DontBlameSendmail))
2686                                 sff |= SFF_NOPATHCHECK;
2687                         else
2688                                 sff |= SFF_SAFEDIRPATH;
2689                         ret = safefile(m->m_mailer, getuid(), getgid(),
2690                                        user, sff, 0, NULL);
2691                         if (ret != 0)
2692                                 sm_syslog(LOG_INFO, e->e_id,
2693                                           "Warning: program %s unsafe: %s",
2694                                           m->m_mailer, sm_errstring(ret));
2695
2696                         /* arrange to filter std & diag output of command */
2697                         (void) close(rpvect[0]);
2698                         if (dup2(rpvect[1], STDOUT_FILENO) < 0)
2699                         {
2700                                 syserr("%s... openmailer(%s): cannot dup pipe %d for stdout",
2701                                        shortenstring(e->e_to, MAXSHORTSTR),
2702                                        m->m_name, rpvect[1]);
2703                                 _exit(EX_OSERR);
2704                         }
2705                         (void) close(rpvect[1]);
2706
2707                         if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0)
2708                         {
2709                                 syserr("%s... openmailer(%s): cannot dup stdout for stderr",
2710                                        shortenstring(e->e_to, MAXSHORTSTR),
2711                                        m->m_name);
2712                                 _exit(EX_OSERR);
2713                         }
2714
2715                         /* arrange to get standard input */
2716                         (void) close(mpvect[1]);
2717                         if (dup2(mpvect[0], STDIN_FILENO) < 0)
2718                         {
2719                                 syserr("%s... openmailer(%s): cannot dup pipe %d for stdin",
2720                                        shortenstring(e->e_to, MAXSHORTSTR),
2721                                        m->m_name, mpvect[0]);
2722                                 _exit(EX_OSERR);
2723                         }
2724                         (void) close(mpvect[0]);
2725
2726                         /* arrange for all the files to be closed */
2727                         sm_close_on_exec(STDERR_FILENO + 1, DtableSize);
2728
2729 # if !_FFR_USE_SETLOGIN
2730                         /* run disconnected from terminal */
2731                         (void) setsid();
2732 # endif /* !_FFR_USE_SETLOGIN */
2733
2734                         /* try to execute the mailer */
2735                         (void) execve(m->m_mailer, (ARGV_T) pv,
2736                                       (ARGV_T) UserEnviron);
2737                         save_errno = errno;
2738                         syserr("Cannot exec %s", m->m_mailer);
2739                         if (bitnset(M_LOCALMAILER, m->m_flags) ||
2740                             transienterror(save_errno))
2741                                 _exit(EX_OSERR);
2742                         _exit(EX_UNAVAILABLE);
2743                 }
2744
2745                 /*
2746                 **  Set up return value.
2747                 */
2748
2749                 if (mci == NULL)
2750                 {
2751                         if (clever)
2752                         {
2753                                 /*
2754                                 **  Allocate from general heap, not
2755                                 **  envelope rpool, because this mci
2756                                 **  is going to be cached.
2757                                 */
2758
2759                                 mci = mci_new(NULL);
2760                         }
2761                         else
2762                         {
2763                                 /*
2764                                 **  Prevent a storage leak by allocating
2765                                 **  this from the envelope rpool.
2766                                 */
2767
2768                                 mci = mci_new(e->e_rpool);
2769                         }
2770                 }
2771                 mci->mci_mailer = m;
2772                 if (clever)
2773                 {
2774                         mci->mci_state = MCIS_OPENING;
2775                         mci_cache(mci);
2776                 }
2777                 else
2778                 {
2779                         mci->mci_state = MCIS_OPEN;
2780                 }
2781                 mci->mci_pid = pid;
2782                 (void) close(mpvect[0]);
2783                 mci->mci_out = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT,
2784                                           (void *) &(mpvect[1]), SM_IO_WRONLY_B,
2785                                           NULL);
2786                 if (mci->mci_out == NULL)
2787                 {
2788                         syserr("deliver: cannot create mailer output channel, fd=%d",
2789                                mpvect[1]);
2790                         (void) close(mpvect[1]);
2791                         (void) close(rpvect[0]);
2792                         (void) close(rpvect[1]);
2793                         rcode = EX_OSERR;
2794                         goto give_up;
2795                 }
2796
2797                 (void) close(rpvect[1]);
2798                 mci->mci_in = sm_io_open(SmFtStdiofd, SM_TIME_DEFAULT,
2799                                          (void *) &(rpvect[0]), SM_IO_RDONLY_B,
2800                                          NULL);
2801                 if (mci->mci_in == NULL)
2802                 {
2803                         syserr("deliver: cannot create mailer input channel, fd=%d",
2804                                mpvect[1]);
2805                         (void) close(rpvect[0]);
2806                         (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
2807                         mci->mci_out = NULL;
2808                         rcode = EX_OSERR;
2809                         goto give_up;
2810                 }
2811         }
2812
2813         /*
2814         **  If we are in SMTP opening state, send initial protocol.
2815         */
2816
2817         if (bitnset(M_7BITS, m->m_flags) &&
2818             (!clever || mci->mci_state == MCIS_OPENING))
2819                 mci->mci_flags |= MCIF_7BIT;
2820         if (clever && mci->mci_state != MCIS_CLOSED)
2821         {
2822 # if STARTTLS || SASL
2823                 int dotpos;
2824                 char *srvname;
2825                 extern SOCKADDR CurHostAddr;
2826 # endif /* STARTTLS || SASL */
2827
2828 # if SASL
2829 #  define DONE_AUTH(f)          bitset(MCIF_AUTHACT, f)
2830 # endif /* SASL */
2831 # if STARTTLS
2832 #  define DONE_STARTTLS(f)      bitset(MCIF_TLSACT, f)
2833 # endif /* STARTTLS */
2834 # define ONLY_HELO(f)           bitset(MCIF_ONLY_EHLO, f)
2835 # define SET_HELO(f)            f |= MCIF_ONLY_EHLO
2836 # define CLR_HELO(f)            f &= ~MCIF_ONLY_EHLO
2837
2838 # if STARTTLS || SASL
2839                 /* don't use CurHostName, it is changed in many places */
2840                 if (mci->mci_host != NULL)
2841                 {
2842                         srvname = mci->mci_host;
2843                         dotpos = strlen(srvname) - 1;
2844                         if (dotpos >= 0)
2845                         {
2846                                 if (srvname[dotpos] == '.')
2847                                         srvname[dotpos] = '\0';
2848                                 else
2849                                         dotpos = -1;
2850                         }
2851                 }
2852                 else if (mci->mci_mailer != NULL)
2853                 {
2854                         srvname = mci->mci_mailer->m_name;
2855                         dotpos = -1;
2856                 }
2857                 else
2858                 {
2859                         srvname = "local";
2860                         dotpos = -1;
2861                 }
2862
2863                 /* don't set {server_name} to NULL or "": see getauth() */
2864                 macdefine(&mci->mci_macro, A_TEMP, macid("{server_name}"),
2865                           srvname);
2866
2867                 /* CurHostAddr is set by makeconnection() and mci_get() */
2868                 if (CurHostAddr.sa.sa_family != 0)
2869                 {
2870                         macdefine(&mci->mci_macro, A_TEMP,
2871                                   macid("{server_addr}"),
2872                                   anynet_ntoa(&CurHostAddr));
2873                 }
2874                 else if (mci->mci_mailer != NULL)
2875                 {
2876                         /* mailer name is unique, use it as address */
2877                         macdefine(&mci->mci_macro, A_PERM,
2878                                   macid("{server_addr}"),
2879                                   mci->mci_mailer->m_name);
2880                 }
2881                 else
2882                 {
2883                         /* don't set it to NULL or "": see getauth() */
2884                         macdefine(&mci->mci_macro, A_PERM,
2885                                   macid("{server_addr}"), "0");
2886                 }
2887
2888                 /* undo change of srvname (mci->mci_host) */
2889                 if (dotpos >= 0)
2890                         srvname[dotpos] = '.';
2891
2892 reconnect:      /* after switching to an encrypted connection */
2893 # endif /* STARTTLS || SASL */
2894
2895                 /* set the current connection information */
2896                 e->e_mci = mci;
2897 # if SASL
2898                 mci->mci_saslcap = NULL;
2899 # endif /* SASL */
2900                 smtpinit(m, mci, e, ONLY_HELO(mci->mci_flags));
2901                 CLR_HELO(mci->mci_flags);
2902
2903                 if (IS_DLVR_RETURN(e))
2904                 {
2905                         /*
2906                         **  Check whether other side can deliver e-mail
2907                         **  fast enough
2908                         */
2909
2910                         if (!bitset(MCIF_DLVR_BY, mci->mci_flags))
2911                         {
2912                                 e->e_status = "5.4.7";
2913                                 usrerrenh(e->e_status,
2914                                           "554 Server does not support Deliver By");
2915                                 rcode = EX_UNAVAILABLE;
2916                                 goto give_up;
2917                         }
2918                         if (e->e_deliver_by > 0 &&
2919                             e->e_deliver_by - (curtime() - e->e_ctime) <
2920                             mci->mci_min_by)
2921                         {
2922                                 e->e_status = "5.4.7";
2923                                 usrerrenh(e->e_status,
2924                                           "554 Message can't be delivered in time; %ld < %ld",
2925                                           e->e_deliver_by - (curtime() - e->e_ctime),
2926                                           mci->mci_min_by);
2927                                 rcode = EX_UNAVAILABLE;
2928                                 goto give_up;
2929                         }
2930                 }
2931
2932 # if STARTTLS
2933                 /* first TLS then AUTH to provide a security layer */
2934                 if (mci->mci_state != MCIS_CLOSED &&
2935                     !DONE_STARTTLS(mci->mci_flags))
2936                 {
2937                         int olderrors;
2938                         bool usetls;
2939                         bool saveQuickAbort = QuickAbort;
2940                         bool saveSuprErrs = SuprErrs;
2941                         char *host = NULL;
2942
2943                         rcode = EX_OK;
2944                         usetls = bitset(MCIF_TLS, mci->mci_flags);
2945                         if (usetls)
2946                                 usetls = !iscltflgset(e, D_NOTLS);
2947
2948                         if (usetls)
2949                         {
2950                                 host = macvalue(macid("{server_name}"), e);
2951                                 olderrors = Errors;
2952                                 QuickAbort = false;
2953                                 SuprErrs = true;
2954                                 if (rscheck("try_tls", host, NULL, e,
2955                                             RSF_RMCOMM, 7, host, NOQID) != EX_OK
2956                                     || Errors > olderrors)
2957                                         usetls = false;
2958                                 SuprErrs = saveSuprErrs;
2959                                 QuickAbort = saveQuickAbort;
2960                         }
2961
2962                         if (usetls)
2963                         {
2964                                 if ((rcode = starttls(m, mci, e)) == EX_OK)
2965                                 {
2966                                         /* start again without STARTTLS */
2967                                         mci->mci_flags |= MCIF_TLSACT;
2968                                 }
2969                                 else
2970                                 {
2971                                         char *s;
2972
2973                                         /*
2974                                         **  TLS negotation failed, what to do?
2975                                         **  fall back to unencrypted connection
2976                                         **  or abort? How to decide?
2977                                         **  set a macro and call a ruleset.
2978                                         */
2979
2980                                         mci->mci_flags &= ~MCIF_TLS;
2981                                         switch (rcode)
2982                                         {
2983                                           case EX_TEMPFAIL:
2984                                                 s = "TEMP";
2985                                                 break;
2986                                           case EX_USAGE:
2987                                                 s = "USAGE";
2988                                                 break;
2989                                           case EX_PROTOCOL:
2990                                                 s = "PROTOCOL";
2991                                                 break;
2992                                           case EX_SOFTWARE:
2993                                                 s = "SOFTWARE";
2994                                                 break;
2995                                           case EX_UNAVAILABLE:
2996                                                 s = "NONE";
2997                                                 break;
2998
2999                                           /* everything else is a failure */
3000                                           default:
3001                                                 s = "FAILURE";
3002                                                 rcode = EX_TEMPFAIL;
3003                                         }
3004                                         macdefine(&e->e_macro, A_PERM,
3005                                                   macid("{verify}"), s);
3006                                 }
3007                         }
3008                         else
3009                                 macdefine(&e->e_macro, A_PERM,
3010                                           macid("{verify}"), "NONE");
3011                         olderrors = Errors;
3012                         QuickAbort = false;
3013                         SuprErrs = true;
3014
3015                         /*
3016                         **  rcode == EX_SOFTWARE is special:
3017                         **  the TLS negotation failed
3018                         **  we have to drop the connection no matter what
3019                         **  However, we call tls_server to give it the chance
3020                         **  to log the problem and return an appropriate
3021                         **  error code.
3022                         */
3023
3024                         if (rscheck("tls_server",
3025                                     macvalue(macid("{verify}"), e),
3026                                     NULL, e, RSF_RMCOMM|RSF_COUNT, 5,
3027                                     host, NOQID) != EX_OK ||
3028                             Errors > olderrors ||
3029                             rcode == EX_SOFTWARE)
3030                         {
3031                                 char enhsc[ENHSCLEN];
3032                                 extern char MsgBuf[];
3033
3034                                 if (ISSMTPCODE(MsgBuf) &&
3035                                     extenhsc(MsgBuf + 4, ' ', enhsc) > 0)
3036                                 {
3037                                         p = sm_rpool_strdup_x(e->e_rpool,
3038                                                               MsgBuf);
3039                                 }
3040                                 else
3041                                 {
3042                                         p = "403 4.7.0 server not authenticated.";
3043                                         (void) sm_strlcpy(enhsc, "4.7.0",
3044                                                           sizeof enhsc);
3045                                 }
3046                                 SuprErrs = saveSuprErrs;
3047                                 QuickAbort = saveQuickAbort;
3048
3049                                 if (rcode == EX_SOFTWARE)
3050                                 {
3051                                         /* drop the connection */
3052                                         mci->mci_state = MCIS_QUITING;
3053                                         if (mci->mci_in != NULL)
3054                                         {
3055                                                 (void) sm_io_close(mci->mci_in,
3056                                                                    SM_TIME_DEFAULT);
3057                                                 mci->mci_in = NULL;
3058                                         }
3059                                         mci->mci_flags &= ~MCIF_TLSACT;
3060                                         (void) endmailer(mci, e, pv);
3061                                 }
3062                                 else
3063                                 {
3064                                         /* abort transfer */
3065                                         smtpquit(m, mci, e);
3066                                 }
3067
3068                                 /* avoid bogus error msg */
3069                                 mci->mci_errno = 0;
3070
3071                                 /* temp or permanent failure? */
3072                                 rcode = (*p == '4') ? EX_TEMPFAIL
3073                                                     : EX_UNAVAILABLE;
3074                                 mci_setstat(mci, rcode, enhsc, p);
3075
3076                                 /*
3077                                 **  hack to get the error message into
3078                                 **  the envelope (done in giveresponse())
3079                                 */
3080
3081                                 (void) sm_strlcpy(SmtpError, p,
3082                                                   sizeof SmtpError);
3083                         }
3084                         QuickAbort = saveQuickAbort;
3085                         SuprErrs = saveSuprErrs;
3086                         if (DONE_STARTTLS(mci->mci_flags) &&
3087                             mci->mci_state != MCIS_CLOSED)
3088                         {
3089                                 SET_HELO(mci->mci_flags);
3090                                 mci->mci_flags &= ~MCIF_EXTENS;
3091                                 goto reconnect;
3092                         }
3093                 }
3094 # endif /* STARTTLS */
3095 # if SASL
3096                 /* if other server supports authentication let's authenticate */
3097                 if (mci->mci_state != MCIS_CLOSED &&
3098                     mci->mci_saslcap != NULL &&
3099                     !DONE_AUTH(mci->mci_flags) && !iscltflgset(e, D_NOAUTH))
3100                 {
3101                         /* Should we require some minimum authentication? */
3102                         if ((ret = smtpauth(m, mci, e)) == EX_OK)
3103                         {
3104                                 int result;
3105                                 sasl_ssf_t *ssf = NULL;
3106
3107                                 /* Get security strength (features) */
3108                                 result = sasl_getprop(mci->mci_conn, SASL_SSF,
3109 # if SASL >= 20000
3110                                                       (const void **) &ssf);
3111 # else /* SASL >= 20000 */
3112                                                       (void **) &ssf);
3113 # endif /* SASL >= 20000 */
3114
3115                                 /* XXX authid? */
3116                                 if (LogLevel > 9)
3117                                         sm_syslog(LOG_INFO, NOQID,
3118                                                   "AUTH=client, relay=%.100s, mech=%.16s, bits=%d",
3119                                                   mci->mci_host,
3120                                                   macvalue(macid("{auth_type}"), e),
3121                                                   result == SASL_OK ? *ssf : 0);
3122
3123                                 /*
3124                                 **  Only switch to encrypted connection
3125                                 **  if a security layer has been negotiated
3126                                 */
3127
3128                                 if (result == SASL_OK && *ssf > 0)
3129                                 {
3130                                         int tmo;
3131
3132                                         /*
3133                                         **  Convert I/O layer to use SASL.
3134                                         **  If the call fails, the connection
3135                                         **  is aborted.
3136                                         */
3137
3138                                         tmo = DATA_PROGRESS_TIMEOUT * 1000;
3139                                         if (sfdcsasl(&mci->mci_in,
3140                                                      &mci->mci_out,
3141                                                      mci->mci_conn, tmo) == 0)
3142                                         {
3143                                                 mci->mci_flags &= ~MCIF_EXTENS;
3144                                                 mci->mci_flags |= MCIF_AUTHACT|
3145                                                                   MCIF_ONLY_EHLO;
3146                                                 goto reconnect;
3147                                         }
3148                                         syserr("AUTH TLS switch failed in client");
3149                                 }
3150                                 /* else? XXX */
3151                                 mci->mci_flags |= MCIF_AUTHACT;
3152
3153                         }
3154                         else if (ret == EX_TEMPFAIL)
3155                         {
3156                                 if (LogLevel > 8)
3157                                         sm_syslog(LOG_ERR, NOQID,
3158                                                   "AUTH=client, relay=%.100s, temporary failure, connection abort",
3159                                                   mci->mci_host);
3160                                 smtpquit(m, mci, e);
3161
3162                                 /* avoid bogus error msg */
3163                                 mci->mci_errno = 0;
3164                                 rcode = EX_TEMPFAIL;
3165                                 mci_setstat(mci, rcode, "4.3.0", p);
3166
3167                                 /*
3168                                 **  hack to get the error message into
3169                                 **  the envelope (done in giveresponse())
3170                                 */
3171
3172                                 (void) sm_strlcpy(SmtpError,
3173                                                   "Temporary AUTH failure",
3174                                                   sizeof SmtpError);
3175                         }
3176                 }
3177 # endif /* SASL */
3178         }
3179
3180
3181 do_transfer:
3182         /* clear out per-message flags from connection structure */
3183         mci->mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
3184
3185         if (bitset(EF_HAS8BIT, e->e_flags) &&
3186             !bitset(EF_DONT_MIME, e->e_flags) &&
3187             bitnset(M_7BITS, m->m_flags))
3188                 mci->mci_flags |= MCIF_CVT8TO7;
3189
3190 #if MIME7TO8
3191         if (bitnset(M_MAKE8BIT, m->m_flags) &&
3192             !bitset(MCIF_7BIT, mci->mci_flags) &&
3193             (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
3194              (sm_strcasecmp(p, "quoted-printable") == 0 ||
3195               sm_strcasecmp(p, "base64") == 0) &&
3196             (p = hvalue("Content-Type", e->e_header)) != NULL)
3197         {
3198                 /* may want to convert 7 -> 8 */
3199                 /* XXX should really parse it here -- and use a class XXX */
3200                 if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
3201                     (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
3202                         mci->mci_flags |= MCIF_CVT7TO8;
3203         }
3204 #endif /* MIME7TO8 */
3205
3206         if (tTd(11, 1))
3207         {
3208                 sm_dprintf("openmailer: ");
3209                 mci_dump(sm_debug_file(), mci, false);
3210         }
3211
3212 #if _FFR_CLIENT_SIZE
3213         /*
3214         **  See if we know the maximum size and
3215         **  abort if the message is too big.
3216         **
3217         **  NOTE: _FFR_CLIENT_SIZE is untested.
3218         */
3219
3220         if (bitset(MCIF_SIZE, mci->mci_flags) &&
3221             mci->mci_maxsize > 0 &&
3222             e->e_msgsize > mci->mci_maxsize)
3223         {
3224                 e->e_flags |= EF_NO_BODY_RETN;
3225                 if (bitnset(M_LOCALMAILER, m->m_flags))
3226                         e->e_status = "5.2.3";
3227                 else
3228                         e->e_status = "5.3.4";
3229
3230                 usrerrenh(e->e_status,
3231                           "552 Message is too large; %ld bytes max",
3232                           mci->mci_maxsize);
3233                 rcode = EX_DATAERR;
3234
3235                 /* Need an e_message for error */
3236                 (void) sm_snprintf(SmtpError, sizeof SmtpError,
3237                                    "Message is too large; %ld bytes max",
3238                                    mci->mci_maxsize);
3239                 goto give_up;
3240         }
3241 #endif /* _FFR_CLIENT_SIZE */
3242
3243         if (mci->mci_state != MCIS_OPEN)
3244         {
3245                 /* couldn't open the mailer */
3246                 rcode = mci->mci_exitstat;
3247                 errno = mci->mci_errno;
3248                 SM_SET_H_ERRNO(mci->mci_herrno);
3249                 if (rcode == EX_OK)
3250                 {
3251                         /* shouldn't happen */
3252                         syserr("554 5.3.5 deliver: mci=%lx rcode=%d errno=%d state=%d sig=%s",
3253                                (unsigned long) mci, rcode, errno,
3254                                mci->mci_state, firstsig);
3255                         mci_dump_all(smioout, true);
3256                         rcode = EX_SOFTWARE;
3257                 }
3258                 else if (nummxhosts > hostnum)
3259                 {
3260                         /* try next MX site */
3261                         goto tryhost;
3262                 }
3263         }
3264         else if (!clever)
3265         {
3266                 bool ok;
3267
3268                 /*
3269                 **  Format and send message.
3270                 */
3271
3272                 rcode = EX_OK;
3273                 errno = 0;
3274                 ok = putfromline(mci, e);
3275                 if (ok)
3276                         ok = (*e->e_puthdr)(mci, e->e_header, e, M87F_OUTER);
3277                 if (ok)
3278                         ok = (*e->e_putbody)(mci, e, NULL);
3279
3280                 /*
3281                 **  Ignore an I/O error that was caused by EPIPE.
3282                 **  Some broken mailers don't read the entire body
3283                 **  but just exit() thus causing an I/O error.
3284                 */
3285
3286                 if (!ok && (sm_io_error(mci->mci_out) && errno == EPIPE))
3287                         ok = true;
3288
3289                 /* (always) get the exit status */
3290                 rcode = endmailer(mci, e, pv);
3291                 if (!ok)
3292                         rcode = EX_TEMPFAIL;
3293                 if (rcode == EX_TEMPFAIL && SmtpError[0] == '\0')
3294                 {
3295                         /*
3296                         **  Need an e_message for mailq display.
3297                         **  We set SmtpError as
3298                         */
3299
3300                         (void) sm_snprintf(SmtpError, sizeof SmtpError,
3301                                            "%s mailer (%s) exited with EX_TEMPFAIL",
3302                                            m->m_name, m->m_mailer);
3303                 }
3304         }
3305         else
3306         {
3307                 /*
3308                 **  Send the MAIL FROM: protocol
3309                 */
3310
3311                 /* XXX this isn't pipelined... */
3312                 rcode = smtpmailfrom(m, mci, e);
3313                 if (rcode == EX_OK)
3314                 {
3315                         register int i;
3316 # if PIPELINING
3317                         ADDRESS *volatile pchain;
3318 # endif /* PIPELINING */
3319
3320                         /* send the recipient list */
3321                         tobuf[0] = '\0';
3322                         mci->mci_retryrcpt = false;
3323                         mci->mci_tolist = tobuf;
3324 # if PIPELINING
3325                         pchain = NULL;
3326                         mci->mci_nextaddr = NULL;
3327 # endif /* PIPELINING */
3328
3329                         for (to = tochain; to != NULL; to = to->q_tchain)
3330                         {
3331                                 if (!QS_IS_UNMARKED(to->q_state))
3332                                         continue;
3333
3334                                 /* mark recipient state as "ok so far" */
3335                                 to->q_state = QS_OK;
3336                                 e->e_to = to->q_paddr;
3337 # if STARTTLS
3338                                 i = rscheck("tls_rcpt", to->q_user, NULL, e,
3339                                             RSF_RMCOMM|RSF_COUNT, 3,
3340                                             mci->mci_host, e->e_id);
3341                                 if (i != EX_OK)
3342                                 {
3343                                         markfailure(e, to, mci, i, false);
3344                                         giveresponse(i, to->q_status,  m, mci,
3345                                                      ctladdr, xstart, e, to);
3346                                         if (i == EX_TEMPFAIL)
3347                                         {
3348                                                 mci->mci_retryrcpt = true;
3349                                                 to->q_state = QS_RETRY;
3350                                         }
3351                                         continue;
3352                                 }
3353 # endif /* STARTTLS */
3354
3355                                 i = smtprcpt(to, m, mci, e, ctladdr, xstart);
3356 # if PIPELINING
3357                                 if (i == EX_OK &&
3358                                     bitset(MCIF_PIPELINED, mci->mci_flags))
3359                                 {
3360                                         /*
3361                                         **  Add new element to list of
3362                                         **  recipients for pipelining.
3363                                         */
3364
3365                                         to->q_pchain = NULL;
3366                                         if (mci->mci_nextaddr == NULL)
3367                                                 mci->mci_nextaddr = to;
3368                                         if (pchain == NULL)
3369                                                 pchain = to;
3370                                         else
3371                                         {
3372                                                 pchain->q_pchain = to;
3373                                                 pchain = pchain->q_pchain;
3374                                         }
3375                                 }
3376 # endif /* PIPELINING */
3377                                 if (i != EX_OK)
3378                                 {
3379                                         markfailure(e, to, mci, i, false);
3380                                         giveresponse(i, to->q_status, m, mci,
3381                                                      ctladdr, xstart, e, to);
3382                                         if (i == EX_TEMPFAIL)
3383                                                 to->q_state = QS_RETRY;
3384                                 }
3385                         }
3386
3387                         /* No recipients in list and no missing responses? */
3388                         if (tobuf[0] == '\0'
3389 # if PIPELINING
3390                             && mci->mci_nextaddr == NULL
3391 # endif /* PIPELINING */
3392                            )
3393                         {
3394                                 rcode = EX_OK;
3395                                 e->e_to = NULL;
3396                                 if (bitset(MCIF_CACHED, mci->mci_flags))
3397                                         smtprset(m, mci, e);
3398                         }
3399                         else
3400                         {
3401                                 e->e_to = tobuf + 1;
3402                                 rcode = smtpdata(m, mci, e, ctladdr, xstart);
3403                         }
3404                 }
3405                 if (rcode == EX_TEMPFAIL && nummxhosts > hostnum)
3406                 {
3407                         /* try next MX site */
3408                         goto tryhost;
3409                 }
3410         }
3411 #if NAMED_BIND
3412         if (ConfigLevel < 2)
3413                 _res.options |= RES_DEFNAMES | RES_DNSRCH;      /* XXX */
3414 #endif /* NAMED_BIND */
3415
3416         if (tTd(62, 1))
3417                 checkfds("after delivery");
3418
3419         /*
3420         **  Do final status disposal.
3421         **      We check for something in tobuf for the SMTP case.
3422         **      If we got a temporary failure, arrange to queue the
3423         **              addressees.
3424         */
3425
3426   give_up:
3427         if (bitnset(M_LMTP, m->m_flags))
3428         {
3429                 lmtp_rcode = rcode;
3430                 tobuf[0] = '\0';
3431                 anyok = false;
3432                 strsize = 0;
3433         }
3434         else
3435                 anyok = rcode == EX_OK;
3436
3437         for (to = tochain; to != NULL; to = to->q_tchain)
3438         {
3439                 /* see if address already marked */
3440                 if (!QS_IS_OK(to->q_state))
3441                         continue;
3442
3443                 /* if running LMTP, get the status for each address */
3444                 if (bitnset(M_LMTP, m->m_flags))
3445                 {
3446                         if (lmtp_rcode == EX_OK)
3447                                 rcode = smtpgetstat(m, mci, e);
3448                         if (rcode == EX_OK)
3449                         {
3450                                 strsize += sm_strlcat2(tobuf + strsize, ",",
3451                                                 to->q_paddr,
3452                                                 tobufsize - strsize);
3453                                 SM_ASSERT(strsize < tobufsize);
3454                                 anyok = true;
3455                         }
3456                         else
3457                         {
3458                                 e->e_to = to->q_paddr;
3459                                 markfailure(e, to, mci, rcode, true);
3460                                 giveresponse(rcode, to->q_status, m, mci,
3461                                              ctladdr, xstart, e, to);
3462                                 e->e_to = tobuf + 1;
3463                                 continue;
3464                         }
3465                 }
3466                 else
3467                 {
3468                         /* mark bad addresses */
3469                         if (rcode != EX_OK)
3470                         {
3471                                 if (goodmxfound && rcode == EX_NOHOST)
3472                                         rcode = EX_TEMPFAIL;
3473                                 markfailure(e, to, mci, rcode, true);
3474                                 continue;
3475                         }
3476                 }
3477
3478                 /* successful delivery */
3479                 to->q_state = QS_SENT;
3480                 to->q_statdate = curtime();
3481                 e->e_nsent++;
3482
3483                 /*
3484                 **  Checkpoint the send list every few addresses
3485                 */
3486
3487                 if (CheckpointInterval > 0 && e->e_nsent >= CheckpointInterval)
3488                 {
3489                         queueup(e, false, false);
3490                         e->e_nsent = 0;
3491                 }
3492
3493                 if (bitnset(M_LOCALMAILER, m->m_flags) &&
3494                     bitset(QPINGONSUCCESS, to->q_flags))
3495                 {
3496                         to->q_flags |= QDELIVERED;
3497                         to->q_status = "2.1.5";
3498                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3499                                              "%s... Successfully delivered\n",
3500                                              to->q_paddr);
3501                 }
3502                 else if (bitset(QPINGONSUCCESS, to->q_flags) &&
3503                          bitset(QPRIMARY, to->q_flags) &&
3504                          !bitset(MCIF_DSN, mci->mci_flags))
3505                 {
3506                         to->q_flags |= QRELAYED;
3507                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3508                                              "%s... relayed; expect no further notifications\n",
3509                                              to->q_paddr);
3510                 }
3511                 else if (IS_DLVR_NOTIFY(e) &&
3512                          !bitset(MCIF_DLVR_BY, mci->mci_flags) &&
3513                          bitset(QPRIMARY, to->q_flags) &&
3514                          (!bitset(QHASNOTIFY, to->q_flags) ||
3515                           bitset(QPINGONSUCCESS, to->q_flags) ||
3516                           bitset(QPINGONFAILURE, to->q_flags) ||
3517                           bitset(QPINGONDELAY, to->q_flags)))
3518                 {
3519                         /* RFC 2852, 4.1.4.2: no NOTIFY, or not NEVER */
3520                         to->q_flags |= QBYNRELAY;
3521                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3522                                              "%s... Deliver-by notify: relayed\n",
3523                                              to->q_paddr);
3524                 }
3525                 else if (IS_DLVR_TRACE(e) &&
3526                          (!bitset(QHASNOTIFY, to->q_flags) ||
3527                           bitset(QPINGONSUCCESS, to->q_flags) ||
3528                           bitset(QPINGONFAILURE, to->q_flags) ||
3529                           bitset(QPINGONDELAY, to->q_flags)) &&
3530                          bitset(QPRIMARY, to->q_flags))
3531                 {
3532                         /* RFC 2852, 4.1.4: no NOTIFY, or not NEVER */
3533                         to->q_flags |= QBYTRACE;
3534                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
3535                                              "%s... Deliver-By trace: relayed\n",
3536                                              to->q_paddr);
3537                 }
3538         }
3539
3540         if (bitnset(M_LMTP, m->m_flags))
3541         {
3542                 /*
3543                 **  Global information applies to the last recipient only;
3544                 **  clear it out to avoid bogus errors.
3545                 */
3546
3547                 rcode = EX_OK;
3548                 e->e_statmsg = NULL;
3549
3550                 /* reset the mci state for the next transaction */
3551                 if (mci != NULL &&
3552                     (mci->mci_state == MCIS_MAIL ||
3553                      mci->mci_state == MCIS_RCPT ||
3554                      mci->mci_state == MCIS_DATA))
3555                 {
3556                         mci->mci_state = MCIS_OPEN;
3557                         SmtpPhase = mci->mci_phase = "idle";
3558                         sm_setproctitle(true, e, "%s: %s", CurHostName,
3559                                         mci->mci_phase);
3560                 }
3561         }
3562
3563         if (tobuf[0] != '\0')
3564         {
3565                 giveresponse(rcode, NULL, m, mci, ctladdr, xstart, e, tochain);
3566 #if 0
3567                 /*
3568                 **  This code is disabled for now because I am not
3569                 **  sure that copying status from the first recipient
3570                 **  to all non-status'ed recipients is a good idea.
3571                 */
3572
3573                 if (tochain->q_message != NULL &&
3574                     !bitnset(M_LMTP, m->m_flags) && rcode != EX_OK)
3575                 {
3576                         for (to = tochain->q_tchain; to != NULL;
3577                              to = to->q_tchain)
3578                         {
3579                                 /* see if address already marked */
3580                                 if (QS_IS_QUEUEUP(to->q_state) &&
3581                                     to->q_message == NULL)
3582                                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
3583                                                         tochain->q_message);
3584                         }
3585                 }
3586 #endif /* 0 */
3587         }
3588         if (anyok)
3589                 markstats(e, tochain, STATS_NORMAL);
3590         mci_store_persistent(mci);
3591
3592         /* Some recipients were tempfailed, try them on the next host */
3593         if (mci != NULL && mci->mci_retryrcpt && nummxhosts > hostnum)
3594         {
3595                 /* try next MX site */
3596                 goto tryhost;
3597         }
3598
3599         /* now close the connection */
3600         if (clever && mci != NULL && mci->mci_state != MCIS_CLOSED &&
3601             !bitset(MCIF_CACHED, mci->mci_flags))
3602                 smtpquit(m, mci, e);
3603
3604 cleanup: ;
3605         }
3606         SM_FINALLY
3607         {
3608                 /*
3609                 **  Restore state and return.
3610                 */
3611 #if XDEBUG
3612                 char wbuf[MAXLINE];
3613
3614                 /* make absolutely certain 0, 1, and 2 are in use */
3615                 (void) sm_snprintf(wbuf, sizeof wbuf,
3616                                    "%s... end of deliver(%s)",
3617                                    e->e_to == NULL ? "NO-TO-LIST"
3618                                                    : shortenstring(e->e_to,
3619                                                                    MAXSHORTSTR),
3620                                   m->m_name);
3621                 checkfd012(wbuf);
3622 #endif /* XDEBUG */
3623
3624                 errno = 0;
3625
3626                 /*
3627                 **  It was originally necessary to set macro 'g' to NULL
3628                 **  because it previously pointed to an auto buffer.
3629                 **  We don't do this any more, so this may be unnecessary.
3630                 */
3631
3632                 macdefine(&e->e_macro, A_PERM, 'g', (char *) NULL);
3633                 e->e_to = NULL;
3634         }
3635         SM_END_TRY
3636         return rcode;
3637 }
3638
3639 /*
3640 **  MARKFAILURE -- mark a failure on a specific address.
3641 **
3642 **      Parameters:
3643 **              e -- the envelope we are sending.
3644 **              q -- the address to mark.
3645 **              mci -- mailer connection information.
3646 **              rcode -- the code signifying the particular failure.
3647 **              ovr -- override an existing code?
3648 **
3649 **      Returns:
3650 **              none.
3651 **
3652 **      Side Effects:
3653 **              marks the address (and possibly the envelope) with the
3654 **                      failure so that an error will be returned or
3655 **                      the message will be queued, as appropriate.
3656 */
3657
3658 void
3659 markfailure(e, q, mci, rcode, ovr)
3660         register ENVELOPE *e;
3661         register ADDRESS *q;
3662         register MCI *mci;
3663         int rcode;
3664         bool ovr;
3665 {
3666         int save_errno = errno;
3667         char *status = NULL;
3668         char *rstatus = NULL;
3669
3670         switch (rcode)
3671         {
3672           case EX_OK:
3673                 break;
3674
3675           case EX_TEMPFAIL:
3676           case EX_IOERR:
3677           case EX_OSERR:
3678                 q->q_state = QS_QUEUEUP;
3679                 break;
3680
3681           default:
3682                 q->q_state = QS_BADADDR;
3683                 break;
3684         }
3685
3686         /* find most specific error code possible */
3687         if (mci != NULL && mci->mci_status != NULL)
3688         {
3689                 status = sm_rpool_strdup_x(e->e_rpool, mci->mci_status);
3690                 if (mci->mci_rstatus != NULL)
3691                         rstatus = sm_rpool_strdup_x(e->e_rpool,
3692                                                     mci->mci_rstatus);
3693                 else
3694                         rstatus = NULL;
3695         }
3696         else if (e->e_status != NULL)
3697         {
3698                 status = e->e_status;
3699                 rstatus = NULL;
3700         }
3701         else
3702         {
3703                 switch (rcode)
3704                 {
3705                   case EX_USAGE:
3706                         status = "5.5.4";
3707                         break;
3708
3709                   case EX_DATAERR:
3710                         status = "5.5.2";
3711                         break;
3712
3713                   case EX_NOUSER:
3714                         status = "5.1.1";
3715                         break;
3716
3717                   case EX_NOHOST:
3718                         status = "5.1.2";
3719                         break;
3720
3721                   case EX_NOINPUT:
3722                   case EX_CANTCREAT:
3723                   case EX_NOPERM:
3724                         status = "5.3.0";
3725                         break;
3726
3727                   case EX_UNAVAILABLE:
3728                   case EX_SOFTWARE:
3729                   case EX_OSFILE:
3730                   case EX_PROTOCOL:
3731                   case EX_CONFIG:
3732                         status = "5.5.0";
3733                         break;
3734
3735                   case EX_OSERR:
3736                   case EX_IOERR:
3737                         status = "4.5.0";
3738                         break;
3739
3740                   case EX_TEMPFAIL:
3741                         status = "4.2.0";
3742                         break;
3743                 }
3744         }
3745
3746         /* new status? */
3747         if (status != NULL && *status != '\0' && (ovr || q->q_status == NULL ||
3748             *q->q_status == '\0' || *q->q_status < *status))
3749         {
3750                 q->q_status = status;
3751                 q->q_rstatus = rstatus;
3752         }
3753         if (rcode != EX_OK && q->q_rstatus == NULL &&
3754             q->q_mailer != NULL && q->q_mailer->m_diagtype != NULL &&
3755             sm_strcasecmp(q->q_mailer->m_diagtype, "X-UNIX") == 0)
3756         {
3757                 char buf[16];
3758
3759                 (void) sm_snprintf(buf, sizeof buf, "%d", rcode);
3760                 q->q_rstatus = sm_rpool_strdup_x(e->e_rpool, buf);
3761         }
3762
3763         q->q_statdate = curtime();
3764         if (CurHostName != NULL && CurHostName[0] != '\0' &&
3765             mci != NULL && !bitset(M_LOCALMAILER, mci->mci_flags))
3766                 q->q_statmta = sm_rpool_strdup_x(e->e_rpool, CurHostName);
3767
3768         /* restore errno */
3769         errno = save_errno;
3770 }
3771 /*
3772 **  ENDMAILER -- Wait for mailer to terminate.
3773 **
3774 **      We should never get fatal errors (e.g., segmentation
3775 **      violation), so we report those specially.  For other
3776 **      errors, we choose a status message (into statmsg),
3777 **      and if it represents an error, we print it.
3778 **
3779 **      Parameters:
3780 **              mci -- the mailer connection info.
3781 **              e -- the current envelope.
3782 **              pv -- the parameter vector that invoked the mailer
3783 **                      (for error messages).
3784 **
3785 **      Returns:
3786 **              exit code of mailer.
3787 **
3788 **      Side Effects:
3789 **              none.
3790 */
3791
3792 static jmp_buf  EndWaitTimeout;
3793
3794 static void
3795 endwaittimeout(ignore)
3796         int ignore;
3797 {
3798         /*
3799         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
3800         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
3801         **      DOING.
3802         */
3803
3804         errno = ETIMEDOUT;
3805         longjmp(EndWaitTimeout, 1);
3806 }
3807
3808 int
3809 endmailer(mci, e, pv)
3810         register MCI *mci;
3811         register ENVELOPE *e;
3812         char **pv;
3813 {
3814         int st;
3815         int save_errno = errno;
3816         char buf[MAXLINE];
3817         SM_EVENT *ev = NULL;
3818
3819
3820         mci_unlock_host(mci);
3821
3822         /* close output to mailer */
3823         if (mci->mci_out != NULL)
3824         {
3825                 (void) sm_io_close(mci->mci_out, SM_TIME_DEFAULT);
3826                 mci->mci_out = NULL;
3827         }
3828
3829         /* copy any remaining input to transcript */
3830         if (mci->mci_in != NULL && mci->mci_state != MCIS_ERROR &&
3831             e->e_xfp != NULL)
3832         {
3833                 while (sfgets(buf, sizeof buf, mci->mci_in,
3834                               TimeOuts.to_quit, "Draining Input") != NULL)
3835                         (void) sm_io_fputs(e->e_xfp, SM_TIME_DEFAULT, buf);
3836         }
3837
3838 #if SASL
3839         /* close SASL connection */
3840         if (bitset(MCIF_AUTHACT, mci->mci_flags))
3841         {
3842                 sasl_dispose(&mci->mci_conn);
3843                 mci->mci_flags &= ~MCIF_AUTHACT;
3844         }
3845 #endif /* SASL */
3846
3847 #if STARTTLS
3848         /* shutdown TLS */
3849         (void) endtlsclt(mci);
3850 #endif /* STARTTLS */
3851
3852         /* now close the input */
3853         if (mci->mci_in != NULL)
3854         {
3855                 (void) sm_io_close(mci->mci_in, SM_TIME_DEFAULT);
3856                 mci->mci_in = NULL;
3857         }
3858         mci->mci_state = MCIS_CLOSED;
3859
3860         errno = save_errno;
3861
3862         /* in the IPC case there is nothing to wait for */
3863         if (mci->mci_pid == 0)
3864                 return EX_OK;
3865
3866         /* put a timeout around the wait */
3867         if (mci->mci_mailer->m_wait > 0)
3868         {
3869                 if (setjmp(EndWaitTimeout) == 0)
3870                         ev = sm_setevent(mci->mci_mailer->m_wait,
3871                                          endwaittimeout, 0);
3872                 else
3873                 {
3874                         syserr("endmailer %s: wait timeout (%ld)",
3875                                mci->mci_mailer->m_name,
3876                                (long) mci->mci_mailer->m_wait);
3877                         return EX_TEMPFAIL;
3878                 }
3879         }
3880
3881         /* wait for the mailer process, collect status */
3882         st = waitfor(mci->mci_pid);
3883         save_errno = errno;
3884         if (ev != NULL)
3885                 sm_clrevent(ev);
3886         errno = save_errno;
3887
3888         if (st == -1)
3889         {
3890                 syserr("endmailer %s: wait", mci->mci_mailer->m_name);
3891                 return EX_SOFTWARE;
3892         }
3893
3894         if (WIFEXITED(st))
3895         {
3896                 /* normal death -- return status */
3897                 return (WEXITSTATUS(st));
3898         }
3899
3900         /* it died a horrid death */
3901         syserr("451 4.3.0 mailer %s died with signal %d%s",
3902                 mci->mci_mailer->m_name, WTERMSIG(st),
3903                 WCOREDUMP(st) ? " (core dumped)" :
3904                 (WIFSTOPPED(st) ? " (stopped)" : ""));
3905
3906         /* log the arguments */
3907         if (pv != NULL && e->e_xfp != NULL)
3908         {
3909                 register char **av;
3910
3911                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "Arguments:");
3912                 for (av = pv; *av != NULL; av++)
3913                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, " %s",
3914                                              *av);
3915                 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "\n");
3916         }
3917
3918         ExitStat = EX_TEMPFAIL;
3919         return EX_TEMPFAIL;
3920 }
3921 /*
3922 **  GIVERESPONSE -- Interpret an error response from a mailer
3923 **
3924 **      Parameters:
3925 **              status -- the status code from the mailer (high byte
3926 **                      only; core dumps must have been taken care of
3927 **                      already).
3928 **              dsn -- the DSN associated with the address, if any.
3929 **              m -- the mailer info for this mailer.
3930 **              mci -- the mailer connection info -- can be NULL if the
3931 **                      response is given before the connection is made.
3932 **              ctladdr -- the controlling address for the recipient
3933 **                      address(es).
3934 **              xstart -- the transaction start time, for computing
3935 **                      transaction delays.
3936 **              e -- the current envelope.
3937 **              to -- the current recipient (NULL if none).
3938 **
3939 **      Returns:
3940 **              none.
3941 **
3942 **      Side Effects:
3943 **              Errors may be incremented.
3944 **              ExitStat may be set.
3945 */
3946
3947 void
3948 giveresponse(status, dsn, m, mci, ctladdr, xstart, e, to)
3949         int status;
3950         char *dsn;
3951         register MAILER *m;
3952         register MCI *mci;
3953         ADDRESS *ctladdr;
3954         time_t xstart;
3955         ENVELOPE *e;
3956         ADDRESS *to;
3957 {
3958         register const char *statmsg;
3959         int errnum = errno;
3960         int off = 4;
3961         bool usestat = false;
3962         char dsnbuf[ENHSCLEN];
3963         char buf[MAXLINE];
3964         char *exmsg;
3965
3966         if (e == NULL)
3967         {
3968                 syserr("giveresponse: null envelope");
3969                 /* NOTREACHED */
3970                 SM_ASSERT(0);
3971         }
3972
3973         /*
3974         **  Compute status message from code.
3975         */
3976
3977         exmsg = sm_sysexmsg(status);
3978         if (status == 0)
3979         {
3980                 statmsg = "250 2.0.0 Sent";
3981                 if (e->e_statmsg != NULL)
3982                 {
3983                         (void) sm_snprintf(buf, sizeof buf, "%s (%s)",
3984                                            statmsg,
3985                                            shortenstring(e->e_statmsg, 403));
3986                         statmsg = buf;
3987                 }
3988         }
3989         else if (exmsg == NULL)
3990         {
3991                 (void) sm_snprintf(buf, sizeof buf,
3992                                    "554 5.3.0 unknown mailer error %d",
3993                                    status);
3994                 status = EX_UNAVAILABLE;
3995                 statmsg = buf;
3996                 usestat = true;
3997         }
3998         else if (status == EX_TEMPFAIL)
3999         {
4000                 char *bp = buf;
4001
4002                 (void) sm_strlcpy(bp, exmsg + 1, SPACELEFT(buf, bp));
4003                 bp += strlen(bp);
4004 #if NAMED_BIND
4005                 if (h_errno == TRY_AGAIN)
4006                         statmsg = sm_errstring(h_errno + E_DNSBASE);
4007                 else
4008 #endif /* NAMED_BIND */
4009                 {
4010                         if (errnum != 0)
4011                                 statmsg = sm_errstring(errnum);
4012                         else
4013                                 statmsg = SmtpError;
4014                 }
4015                 if (statmsg != NULL && statmsg[0] != '\0')
4016                 {
4017                         switch (errnum)
4018                         {
4019 #ifdef ENETDOWN
4020                           case ENETDOWN:        /* Network is down */
4021 #endif /* ENETDOWN */
4022 #ifdef ENETUNREACH
4023                           case ENETUNREACH:     /* Network is unreachable */
4024 #endif /* ENETUNREACH */
4025 #ifdef ENETRESET
4026                           case ENETRESET:       /* Network dropped connection on reset */
4027 #endif /* ENETRESET */
4028 #ifdef ECONNABORTED
4029                           case ECONNABORTED:    /* Software caused connection abort */
4030 #endif /* ECONNABORTED */
4031 #ifdef EHOSTDOWN
4032                           case EHOSTDOWN:       /* Host is down */
4033 #endif /* EHOSTDOWN */
4034 #ifdef EHOSTUNREACH
4035                           case EHOSTUNREACH:    /* No route to host */
4036 #endif /* EHOSTUNREACH */
4037                                 if (mci != NULL && mci->mci_host != NULL)
4038                                 {
4039                                         (void) sm_strlcpyn(bp,
4040                                                            SPACELEFT(buf, bp),
4041                                                            2, ": ",
4042                                                            mci->mci_host);
4043                                         bp += strlen(bp);
4044                                 }
4045                                 break;
4046                         }
4047                         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ": ",
4048                                            statmsg);
4049                         usestat = true;
4050                 }
4051                 statmsg = buf;
4052         }
4053 #if NAMED_BIND
4054         else if (status == EX_NOHOST && h_errno != 0)
4055         {
4056                 statmsg = sm_errstring(h_errno + E_DNSBASE);
4057                 (void) sm_snprintf(buf, sizeof buf, "%s (%s)", exmsg + 1,
4058                                    statmsg);
4059                 statmsg = buf;
4060                 usestat = true;
4061         }
4062 #endif /* NAMED_BIND */
4063         else
4064         {
4065                 statmsg = exmsg;
4066                 if (*statmsg++ == ':' && errnum != 0)
4067                 {
4068                         (void) sm_snprintf(buf, sizeof buf, "%s: %s", statmsg,
4069                                            sm_errstring(errnum));
4070                         statmsg = buf;
4071                         usestat = true;
4072                 }
4073                 else if (bitnset(M_LMTP, m->m_flags) && e->e_statmsg != NULL)
4074                 {
4075                         (void) sm_snprintf(buf, sizeof buf, "%s (%s)", statmsg,
4076                                            shortenstring(e->e_statmsg, 403));
4077                         statmsg = buf;
4078                         usestat = true;
4079                 }
4080         }
4081
4082         /*
4083         **  Print the message as appropriate
4084         */
4085
4086         if (status == EX_OK || status == EX_TEMPFAIL)
4087         {
4088                 extern char MsgBuf[];
4089
4090                 if ((off = isenhsc(statmsg + 4, ' ')) > 0)
4091                 {
4092                         if (dsn == NULL)
4093                         {
4094                                 (void) sm_snprintf(dsnbuf, sizeof dsnbuf,
4095                                                    "%.*s", off, statmsg + 4);
4096                                 dsn = dsnbuf;
4097                         }
4098                         off += 5;
4099                 }
4100                 else
4101                 {
4102                         off = 4;
4103                 }
4104                 message("%s", statmsg + off);
4105                 if (status == EX_TEMPFAIL && e->e_xfp != NULL)
4106                         (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT, "%s\n",
4107                                              &MsgBuf[4]);
4108         }
4109         else
4110         {
4111                 char mbuf[ENHSCLEN + 4];
4112
4113                 Errors++;
4114                 if ((off = isenhsc(statmsg + 4, ' ')) > 0 &&
4115                     off < sizeof mbuf - 4)
4116                 {
4117                         if (dsn == NULL)
4118                         {
4119                                 (void) sm_snprintf(dsnbuf, sizeof dsnbuf,
4120                                                    "%.*s", off, statmsg + 4);
4121                                 dsn = dsnbuf;
4122                         }
4123                         off += 5;
4124
4125                         /* copy only part of statmsg to mbuf */
4126                         (void) sm_strlcpy(mbuf, statmsg, off);
4127                         (void) sm_strlcat(mbuf, " %s", sizeof mbuf);
4128                 }
4129                 else
4130                 {
4131                         dsnbuf[0] = '\0';
4132                         (void) sm_snprintf(mbuf, sizeof mbuf, "%.3s %%s",
4133                                            statmsg);
4134                         off = 4;
4135                 }
4136                 usrerr(mbuf, &statmsg[off]);
4137         }
4138
4139         /*
4140         **  Final cleanup.
4141         **      Log a record of the transaction.  Compute the new
4142         **      ExitStat -- if we already had an error, stick with
4143         **      that.
4144         */
4145
4146         if (OpMode != MD_VERIFY && !bitset(EF_VRFYONLY, e->e_flags) &&
4147             LogLevel > ((status == EX_TEMPFAIL) ? 8 : (status == EX_OK) ? 7 : 6))
4148                 logdelivery(m, mci, dsn, statmsg + off, ctladdr, xstart, e);
4149
4150         if (tTd(11, 2))
4151                 sm_dprintf("giveresponse: status=%d, dsn=%s, e->e_message=%s, errnum=%d\n",
4152                            status,
4153                            dsn == NULL ? "<NULL>" : dsn,
4154                            e->e_message == NULL ? "<NULL>" : e->e_message,
4155                            errnum);
4156
4157         if (status != EX_TEMPFAIL)
4158                 setstat(status);
4159         if (status != EX_OK && (status != EX_TEMPFAIL || e->e_message == NULL))
4160                 e->e_message = sm_rpool_strdup_x(e->e_rpool, statmsg + off);
4161         if (status != EX_OK && to != NULL && to->q_message == NULL)
4162         {
4163                 if (!usestat && e->e_message != NULL)
4164                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4165                                                           e->e_message);
4166                 else
4167                         to->q_message = sm_rpool_strdup_x(e->e_rpool,
4168                                                           statmsg + off);
4169         }
4170         errno = 0;
4171         SM_SET_H_ERRNO(0);
4172 }
4173 /*
4174 **  LOGDELIVERY -- log the delivery in the system log
4175 **
4176 **      Care is taken to avoid logging lines that are too long, because
4177 **      some versions of syslog have an unfortunate proclivity for core
4178 **      dumping.  This is a hack, to be sure, that is at best empirical.
4179 **
4180 **      Parameters:
4181 **              m -- the mailer info.  Can be NULL for initial queue.
4182 **              mci -- the mailer connection info -- can be NULL if the
4183 **                      log is occurring when no connection is active.
4184 **              dsn -- the DSN attached to the status.
4185 **              status -- the message to print for the status.
4186 **              ctladdr -- the controlling address for the to list.
4187 **              xstart -- the transaction start time, used for
4188 **                      computing transaction delay.
4189 **              e -- the current envelope.
4190 **
4191 **      Returns:
4192 **              none
4193 **
4194 **      Side Effects:
4195 **              none
4196 */
4197
4198 void
4199 logdelivery(m, mci, dsn, status, ctladdr, xstart, e)
4200         MAILER *m;
4201         register MCI *mci;
4202         char *dsn;
4203         const char *status;
4204         ADDRESS *ctladdr;
4205         time_t xstart;
4206         register ENVELOPE *e;
4207 {
4208         register char *bp;
4209         register char *p;
4210         int l;
4211         time_t now = curtime();
4212         char buf[1024];
4213
4214 #if (SYSLOG_BUFSIZE) >= 256
4215         /* ctladdr: max 106 bytes */
4216         bp = buf;
4217         if (ctladdr != NULL)
4218         {
4219                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", ctladdr=",
4220                                    shortenstring(ctladdr->q_paddr, 83));
4221                 bp += strlen(bp);
4222                 if (bitset(QGOODUID, ctladdr->q_flags))
4223                 {
4224                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4225                                            (int) ctladdr->q_uid,
4226                                            (int) ctladdr->q_gid);
4227                         bp += strlen(bp);
4228                 }
4229         }
4230
4231         /* delay & xdelay: max 41 bytes */
4232         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", delay=",
4233                            pintvl(now - e->e_ctime, true));
4234         bp += strlen(bp);
4235
4236         if (xstart != (time_t) 0)
4237         {
4238                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4239                                    pintvl(now - xstart, true));
4240                 bp += strlen(bp);
4241         }
4242
4243         /* mailer: assume about 19 bytes (max 10 byte mailer name) */
4244         if (m != NULL)
4245         {
4246                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4247                                    m->m_name);
4248                 bp += strlen(bp);
4249         }
4250
4251         /* pri: changes with each delivery attempt */
4252         (void) sm_snprintf(bp, SPACELEFT(buf, bp), ", pri=%ld",
4253                 e->e_msgpriority);
4254         bp += strlen(bp);
4255
4256         /* relay: max 66 bytes for IPv4 addresses */
4257         if (mci != NULL && mci->mci_host != NULL)
4258         {
4259                 extern SOCKADDR CurHostAddr;
4260
4261                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", relay=",
4262                                    shortenstring(mci->mci_host, 40));
4263                 bp += strlen(bp);
4264
4265                 if (CurHostAddr.sa.sa_family != 0)
4266                 {
4267                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " [%s]",
4268                                            anynet_ntoa(&CurHostAddr));
4269                 }
4270         }
4271         else if (strcmp(status, "quarantined") == 0)
4272         {
4273                 if (e->e_quarmsg != NULL)
4274                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4275                                            ", quarantine=%s",
4276                                            shortenstring(e->e_quarmsg, 40));
4277         }
4278         else if (strcmp(status, "queued") != 0)
4279         {
4280                 p = macvalue('h', e);
4281                 if (p != NULL && p[0] != '\0')
4282                 {
4283                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4284                                            ", relay=%s", shortenstring(p, 40));
4285                 }
4286         }
4287         bp += strlen(bp);
4288
4289         /* dsn */
4290         if (dsn != NULL && *dsn != '\0')
4291         {
4292                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", dsn=",
4293                                    shortenstring(dsn, ENHSCLEN));
4294                 bp += strlen(bp);
4295         }
4296
4297 #if _FFR_LOG_NTRIES
4298         /* ntries */
4299         if (e->e_ntries >= 0)
4300         {
4301                 (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4302                                    ", ntries=%d", e->e_ntries + 1);
4303                 bp += strlen(bp);
4304         }
4305 #endif /* _FFR_LOG_NTRIES */
4306
4307 # define STATLEN                (((SYSLOG_BUFSIZE) - 100) / 4)
4308 # if (STATLEN) < 63
4309 #  undef STATLEN
4310 #  define STATLEN       63
4311 # endif /* (STATLEN) < 63 */
4312 # if (STATLEN) > 203
4313 #  undef STATLEN
4314 #  define STATLEN       203
4315 # endif /* (STATLEN) > 203 */
4316
4317         /* stat: max 210 bytes */
4318         if ((bp - buf) > (sizeof buf - ((STATLEN) + 20)))
4319         {
4320                 /* desperation move -- truncate data */
4321                 bp = buf + sizeof buf - ((STATLEN) + 17);
4322                 (void) sm_strlcpy(bp, "...", SPACELEFT(buf, bp));
4323                 bp += 3;
4324         }
4325
4326         (void) sm_strlcpy(bp, ", stat=", SPACELEFT(buf, bp));
4327         bp += strlen(bp);
4328
4329         (void) sm_strlcpy(bp, shortenstring(status, STATLEN),
4330                           SPACELEFT(buf, bp));
4331
4332         /* id, to: max 13 + TOBUFSIZE bytes */
4333         l = SYSLOG_BUFSIZE - 100 - strlen(buf);
4334         if (l < 0)
4335                 l = 0;
4336         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4337         while (strlen(p) >= l)
4338         {
4339                 register char *q;
4340
4341                 for (q = p + l; q > p; q--)
4342                 {
4343                         if (*q == ',')
4344                                 break;
4345                 }
4346                 if (p == q)
4347                         break;
4348                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]%s",
4349                           (int) (++q - p), p, buf);
4350                 p = q;
4351         }
4352         sm_syslog(LOG_INFO, e->e_id, "to=%.*s%s", l, p, buf);
4353
4354 #else /* (SYSLOG_BUFSIZE) >= 256 */
4355
4356         l = SYSLOG_BUFSIZE - 85;
4357         if (l < 0)
4358                 l = 0;
4359         p = e->e_to == NULL ? "NO-TO-LIST" : e->e_to;
4360         while (strlen(p) >= l)
4361         {
4362                 register char *q;
4363
4364                 for (q = p + l; q > p; q--)
4365                 {
4366                         if (*q == ',')
4367                                 break;
4368                 }
4369                 if (p == q)
4370                         break;
4371
4372                 sm_syslog(LOG_INFO, e->e_id, "to=%.*s [more]",
4373                           (int) (++q - p), p);
4374                 p = q;
4375         }
4376         sm_syslog(LOG_INFO, e->e_id, "to=%.*s", l, p);
4377
4378         if (ctladdr != NULL)
4379         {
4380                 bp = buf;
4381                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "ctladdr=",
4382                                    shortenstring(ctladdr->q_paddr, 83));
4383                 bp += strlen(bp);
4384                 if (bitset(QGOODUID, ctladdr->q_flags))
4385                 {
4386                         (void) sm_snprintf(bp, SPACELEFT(buf, bp), " (%d/%d)",
4387                                            ctladdr->q_uid, ctladdr->q_gid);
4388                         bp += strlen(bp);
4389                 }
4390                 sm_syslog(LOG_INFO, e->e_id, "%s", buf);
4391         }
4392         bp = buf;
4393         (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, "delay=",
4394                            pintvl(now - e->e_ctime, true));
4395         bp += strlen(bp);
4396         if (xstart != (time_t) 0)
4397         {
4398                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", xdelay=",
4399                                    pintvl(now - xstart, true));
4400                 bp += strlen(bp);
4401         }
4402
4403         if (m != NULL)
4404         {
4405                 (void) sm_strlcpyn(bp, SPACELEFT(buf, bp), 2, ", mailer=",
4406                                    m->m_name);
4407                 bp += strlen(bp);
4408         }
4409         sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4410
4411         buf[0] = '\0';
4412         bp = buf;
4413         if (mci != NULL && mci->mci_host != NULL)
4414         {
4415                 extern SOCKADDR CurHostAddr;
4416
4417                 (void) sm_snprintf(bp, SPACELEFT(buf, bp), "relay=%.100s",
4418                                    mci->mci_host);
4419                 bp += strlen(bp);
4420
4421                 if (CurHostAddr.sa.sa_family != 0)
4422                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4423                                            " [%.100s]",
4424                                            anynet_ntoa(&CurHostAddr));
4425         }
4426         else if (strcmp(status, "quarantined") == 0)
4427         {
4428                 if (e->e_quarmsg != NULL)
4429                         (void) sm_snprintf(bp, SPACELEFT(buf, bp),
4430                                            ", quarantine=%.100s",
4431                                            e->e_quarmsg);
4432         }
4433         else if (strcmp(status, "queued") != 0)
4434         {
4435                 p = macvalue('h', e);
4436                 if (p != NULL && p[0] != '\0')
4437                         (void) sm_snprintf(buf, sizeof buf, "relay=%.100s", p);
4438         }
4439         if (buf[0] != '\0')
4440                 sm_syslog(LOG_INFO, e->e_id, "%.1000s", buf);
4441
4442         sm_syslog(LOG_INFO, e->e_id, "stat=%s", shortenstring(status, 63));
4443 #endif /* (SYSLOG_BUFSIZE) >= 256 */
4444 }
4445 /*
4446 **  PUTFROMLINE -- output a UNIX-style from line (or whatever)
4447 **
4448 **      This can be made an arbitrary message separator by changing $l
4449 **
4450 **      One of the ugliest hacks seen by human eyes is contained herein:
4451 **      UUCP wants those stupid "remote from <host>" lines.  Why oh why
4452 **      does a well-meaning programmer such as myself have to deal with
4453 **      this kind of antique garbage????
4454 **
4455 **      Parameters:
4456 **              mci -- the connection information.
4457 **              e -- the envelope.
4458 **
4459 **      Returns:
4460 **              true iff line was written successfully
4461 **
4462 **      Side Effects:
4463 **              outputs some text to fp.
4464 */
4465
4466 bool
4467 putfromline(mci, e)
4468         register MCI *mci;
4469         ENVELOPE *e;
4470 {
4471         char *template = UnixFromLine;
4472         char buf[MAXLINE];
4473         char xbuf[MAXLINE];
4474
4475         if (bitnset(M_NHDR, mci->mci_mailer->m_flags))
4476                 return true;
4477
4478         mci->mci_flags |= MCIF_INHEADER;
4479
4480         if (bitnset(M_UGLYUUCP, mci->mci_mailer->m_flags))
4481         {
4482                 char *bang;
4483
4484                 expand("\201g", buf, sizeof buf, e);
4485                 bang = strchr(buf, '!');
4486                 if (bang == NULL)
4487                 {
4488                         char *at;
4489                         char hname[MAXNAME];
4490
4491                         /*
4492                         **  If we can construct a UUCP path, do so
4493                         */
4494
4495                         at = strrchr(buf, '@');
4496                         if (at == NULL)
4497                         {
4498                                 expand("\201k", hname, sizeof hname, e);
4499                                 at = hname;
4500                         }
4501                         else
4502                                 *at++ = '\0';
4503                         (void) sm_snprintf(xbuf, sizeof xbuf,
4504                                            "From %.800s  \201d remote from %.100s\n",
4505                                            buf, at);
4506                 }
4507                 else
4508                 {
4509                         *bang++ = '\0';
4510                         (void) sm_snprintf(xbuf, sizeof xbuf,
4511                                            "From %.800s  \201d remote from %.100s\n",
4512                                            bang, buf);
4513                         template = xbuf;
4514                 }
4515         }
4516         expand(template, buf, sizeof buf, e);
4517         return putxline(buf, strlen(buf), mci, PXLF_HEADER);
4518 }
4519
4520 /*
4521 **  PUTBODY -- put the body of a message.
4522 **
4523 **      Parameters:
4524 **              mci -- the connection information.
4525 **              e -- the envelope to put out.
4526 **              separator -- if non-NULL, a message separator that must
4527 **                      not be permitted in the resulting message.
4528 **
4529 **      Returns:
4530 **              true iff message was written successfully
4531 **
4532 **      Side Effects:
4533 **              The message is written onto fp.
4534 */
4535
4536 /* values for output state variable */
4537 #define OSTATE_HEAD     0       /* at beginning of line */
4538 #define OSTATE_CR       1       /* read a carriage return */
4539 #define OSTATE_INLINE   2       /* putting rest of line */
4540
4541 bool
4542 putbody(mci, e, separator)
4543         register MCI *mci;
4544         register ENVELOPE *e;
4545         char *separator;
4546 {
4547         bool dead = false;
4548         bool ioerr = false;
4549         int save_errno;
4550         char buf[MAXLINE];
4551 #if MIME8TO7
4552         char *boundaries[MAXMIMENESTING + 1];
4553 #endif /* MIME8TO7 */
4554
4555         /*
4556         **  Output the body of the message
4557         */
4558
4559         if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
4560         {
4561                 char *df = queuename(e, DATAFL_LETTER);
4562
4563                 e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
4564                                       SM_IO_RDONLY_B, NULL);
4565                 if (e->e_dfp == NULL)
4566                 {
4567                         char *msg = "!putbody: Cannot open %s for %s from %s";
4568
4569                         if (errno == ENOENT)
4570                                 msg++;
4571                         syserr(msg, df, e->e_to, e->e_from.q_paddr);
4572                 }
4573
4574         }
4575         if (e->e_dfp == NULL)
4576         {
4577                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4578                 {
4579                         if (!putline("", mci))
4580                                 goto writeerr;
4581                         mci->mci_flags &= ~MCIF_INHEADER;
4582                 }
4583                 if (!putline("<<< No Message Collected >>>", mci))
4584                         goto writeerr;
4585                 goto endofmessage;
4586         }
4587
4588         if (e->e_dfino == (ino_t) 0)
4589         {
4590                 struct stat stbuf;
4591
4592                 if (fstat(sm_io_getinfo(e->e_dfp, SM_IO_WHAT_FD, NULL), &stbuf)
4593                     < 0)
4594                         e->e_dfino = -1;
4595                 else
4596                 {
4597                         e->e_dfdev = stbuf.st_dev;
4598                         e->e_dfino = stbuf.st_ino;
4599                 }
4600         }
4601
4602         /* paranoia: the data file should always be in a rewound state */
4603         (void) bfrewind(e->e_dfp);
4604
4605         /* simulate an I/O timeout when used as source */
4606         if (tTd(84, 101))
4607                 sleep(319);
4608
4609 #if MIME8TO7
4610         if (bitset(MCIF_CVT8TO7, mci->mci_flags))
4611         {
4612                 /*
4613                 **  Do 8 to 7 bit MIME conversion.
4614                 */
4615
4616                 /* make sure it looks like a MIME message */
4617                 if (hvalue("MIME-Version", e->e_header) == NULL &&
4618                     !putline("MIME-Version: 1.0", mci))
4619                         goto writeerr;
4620
4621                 if (hvalue("Content-Type", e->e_header) == NULL)
4622                 {
4623                         (void) sm_snprintf(buf, sizeof buf,
4624                                            "Content-Type: text/plain; charset=%s",
4625                                            defcharset(e));
4626                         if (!putline(buf, mci))
4627                                 goto writeerr;
4628                 }
4629
4630                 /* now do the hard work */
4631                 boundaries[0] = NULL;
4632                 mci->mci_flags |= MCIF_INHEADER;
4633                 if (mime8to7(mci, e->e_header, e, boundaries, M87F_OUTER, 0) ==
4634                                                                 SM_IO_EOF)
4635                         goto writeerr;
4636         }
4637 # if MIME7TO8
4638         else if (bitset(MCIF_CVT7TO8, mci->mci_flags))
4639         {
4640                 if (!mime7to8(mci, e->e_header, e))
4641                         goto writeerr;
4642         }
4643 # endif /* MIME7TO8 */
4644         else if (MaxMimeHeaderLength > 0 || MaxMimeFieldLength > 0)
4645         {
4646                 bool oldsuprerrs = SuprErrs;
4647
4648                 /* Use mime8to7 to check multipart for MIME header overflows */
4649                 boundaries[0] = NULL;
4650                 mci->mci_flags |= MCIF_INHEADER;
4651
4652                 /*
4653                 **  If EF_DONT_MIME is set, we have a broken MIME message
4654                 **  and don't want to generate a new bounce message whose
4655                 **  body propagates the broken MIME.  We can't just not call
4656                 **  mime8to7() as is done above since we need the security
4657                 **  checks.  The best we can do is suppress the errors.
4658                 */
4659
4660                 if (bitset(EF_DONT_MIME, e->e_flags))
4661                         SuprErrs = true;
4662
4663                 if (mime8to7(mci, e->e_header, e, boundaries,
4664                                 M87F_OUTER|M87F_NO8TO7, 0) == SM_IO_EOF)
4665                         goto writeerr;
4666
4667                 /* restore SuprErrs */
4668                 SuprErrs = oldsuprerrs;
4669         }
4670         else
4671 #endif /* MIME8TO7 */
4672         {
4673                 int ostate;
4674                 register char *bp;
4675                 register char *pbp;
4676                 register int c;
4677                 register char *xp;
4678                 int padc;
4679                 char *buflim;
4680                 int pos = 0;
4681                 char peekbuf[12];
4682
4683                 if (bitset(MCIF_INHEADER, mci->mci_flags))
4684                 {
4685                         if (!putline("", mci))
4686                                 goto writeerr;
4687                         mci->mci_flags &= ~MCIF_INHEADER;
4688                 }
4689
4690                 /* determine end of buffer; allow for short mailer lines */
4691                 buflim = &buf[sizeof buf - 1];
4692                 if (mci->mci_mailer->m_linelimit > 0 &&
4693                     mci->mci_mailer->m_linelimit < sizeof buf - 1)
4694                         buflim = &buf[mci->mci_mailer->m_linelimit - 1];
4695
4696                 /* copy temp file to output with mapping */
4697                 ostate = OSTATE_HEAD;
4698                 bp = buf;
4699                 pbp = peekbuf;
4700                 while (!sm_io_error(mci->mci_out) && !dead)
4701                 {
4702                         if (pbp > peekbuf)
4703                                 c = *--pbp;
4704                         else if ((c = sm_io_getc(e->e_dfp, SM_TIME_DEFAULT))
4705                                  == SM_IO_EOF)
4706                                 break;
4707                         if (bitset(MCIF_7BIT, mci->mci_flags))
4708                                 c &= 0x7f;
4709                         switch (ostate)
4710                         {
4711                           case OSTATE_HEAD:
4712                                 if (c == '\0' &&
4713                                     bitnset(M_NONULLS,
4714                                             mci->mci_mailer->m_flags))
4715                                         break;
4716                                 if (c != '\r' && c != '\n' && bp < buflim)
4717                                 {
4718                                         *bp++ = c;
4719                                         break;
4720                                 }
4721
4722                                 /* check beginning of line for special cases */
4723                                 *bp = '\0';
4724                                 pos = 0;
4725                                 padc = SM_IO_EOF;
4726                                 if (buf[0] == 'F' &&
4727                                     bitnset(M_ESCFROM, mci->mci_mailer->m_flags)
4728                                     && strncmp(buf, "From ", 5) == 0)
4729                                 {
4730                                         padc = '>';
4731                                 }
4732                                 if (buf[0] == '-' && buf[1] == '-' &&
4733                                     separator != NULL)
4734                                 {
4735                                         /* possible separator */
4736                                         int sl = strlen(separator);
4737
4738                                         if (strncmp(&buf[2], separator, sl)
4739                                             == 0)
4740                                                 padc = ' ';
4741                                 }
4742                                 if (buf[0] == '.' &&
4743                                     bitnset(M_XDOT, mci->mci_mailer->m_flags))
4744                                 {
4745                                         padc = '.';
4746                                 }
4747
4748                                 /* now copy out saved line */
4749                                 if (TrafficLogFile != NULL)
4750                                 {
4751                                         (void) sm_io_fprintf(TrafficLogFile,
4752                                                              SM_TIME_DEFAULT,
4753                                                              "%05d >>> ",
4754                                                              (int) CurrentPid);
4755                                         if (padc != SM_IO_EOF)
4756                                                 (void) sm_io_putc(TrafficLogFile,
4757                                                                   SM_TIME_DEFAULT,
4758                                                                   padc);
4759                                         for (xp = buf; xp < bp; xp++)
4760                                                 (void) sm_io_putc(TrafficLogFile,
4761                                                                   SM_TIME_DEFAULT,
4762                                                                   (unsigned char) *xp);
4763                                         if (c == '\n')
4764                                                 (void) sm_io_fputs(TrafficLogFile,
4765                                                                    SM_TIME_DEFAULT,
4766                                                                    mci->mci_mailer->m_eol);
4767                                 }
4768                                 if (padc != SM_IO_EOF)
4769                                 {
4770                                         if (sm_io_putc(mci->mci_out,
4771                                                        SM_TIME_DEFAULT, padc)
4772                                             == SM_IO_EOF)
4773                                         {
4774                                                 dead = true;
4775                                                 continue;
4776                                         }
4777                                         pos++;
4778                                 }
4779                                 for (xp = buf; xp < bp; xp++)
4780                                 {
4781                                         if (sm_io_putc(mci->mci_out,
4782                                                        SM_TIME_DEFAULT,
4783                                                        (unsigned char) *xp)
4784                                             == SM_IO_EOF)
4785                                         {
4786                                                 dead = true;
4787                                                 break;
4788                                         }
4789                                 }
4790                                 if (dead)
4791                                         continue;
4792                                 if (c == '\n')
4793                                 {
4794                                         if (sm_io_fputs(mci->mci_out,
4795                                                         SM_TIME_DEFAULT,
4796                                                         mci->mci_mailer->m_eol)
4797                                                         == SM_IO_EOF)
4798                                                 break;
4799                                         pos = 0;
4800                                 }
4801                                 else
4802                                 {
4803                                         pos += bp - buf;
4804                                         if (c != '\r')
4805                                         {
4806                                                 SM_ASSERT(pbp < peekbuf +
4807                                                                 sizeof(peekbuf));
4808                                                 *pbp++ = c;
4809                                         }
4810                                 }
4811
4812                                 bp = buf;
4813
4814                                 /* determine next state */
4815                                 if (c == '\n')
4816                                         ostate = OSTATE_HEAD;
4817                                 else if (c == '\r')
4818                                         ostate = OSTATE_CR;
4819                                 else
4820                                         ostate = OSTATE_INLINE;
4821                                 continue;
4822
4823                           case OSTATE_CR:
4824                                 if (c == '\n')
4825                                 {
4826                                         /* got CRLF */
4827                                         if (sm_io_fputs(mci->mci_out,
4828                                                         SM_TIME_DEFAULT,
4829                                                         mci->mci_mailer->m_eol)
4830                                                         == SM_IO_EOF)
4831                                                 continue;
4832
4833                                         if (TrafficLogFile != NULL)
4834                                         {
4835                                                 (void) sm_io_fputs(TrafficLogFile,
4836                                                                    SM_TIME_DEFAULT,
4837                                                                    mci->mci_mailer->m_eol);
4838                                         }
4839                                         ostate = OSTATE_HEAD;
4840                                         continue;
4841                                 }
4842
4843                                 /* had a naked carriage return */
4844                                 SM_ASSERT(pbp < peekbuf + sizeof(peekbuf));
4845                                 *pbp++ = c;
4846                                 c = '\r';
4847                                 ostate = OSTATE_INLINE;
4848                                 goto putch;
4849
4850                           case OSTATE_INLINE:
4851                                 if (c == '\r')
4852                                 {
4853                                         ostate = OSTATE_CR;
4854                                         continue;
4855                                 }
4856                                 if (c == '\0' &&
4857                                     bitnset(M_NONULLS,
4858                                             mci->mci_mailer->m_flags))
4859                                         break;
4860 putch:
4861                                 if (mci->mci_mailer->m_linelimit > 0 &&
4862                                     pos >= mci->mci_mailer->m_linelimit - 1 &&
4863                                     c != '\n')
4864                                 {
4865                                         int d;
4866
4867                                         /* check next character for EOL */
4868                                         if (pbp > peekbuf)
4869                                                 d = *(pbp - 1);
4870                                         else if ((d = sm_io_getc(e->e_dfp,
4871                                                                  SM_TIME_DEFAULT))
4872                                                  != SM_IO_EOF)
4873                                         {
4874                                                 SM_ASSERT(pbp < peekbuf +
4875                                                                 sizeof(peekbuf));
4876                                                 *pbp++ = d;
4877                                         }
4878
4879                                         if (d == '\n' || d == SM_IO_EOF)
4880                                         {
4881                                                 if (TrafficLogFile != NULL)
4882                                                         (void) sm_io_putc(TrafficLogFile,
4883                                                                           SM_TIME_DEFAULT,
4884                                                                           (unsigned char) c);
4885                                                 if (sm_io_putc(mci->mci_out,
4886                                                                SM_TIME_DEFAULT,
4887                                                                (unsigned char) c)
4888                                                                == SM_IO_EOF)
4889                                                 {
4890                                                         dead = true;
4891                                                         continue;
4892                                                 }
4893                                                 pos++;
4894                                                 continue;
4895                                         }
4896
4897                                         if (sm_io_putc(mci->mci_out,
4898                                                        SM_TIME_DEFAULT, '!')
4899                                             == SM_IO_EOF ||
4900                                             sm_io_fputs(mci->mci_out,
4901                                                         SM_TIME_DEFAULT,
4902                                                         mci->mci_mailer->m_eol)
4903                                             == SM_IO_EOF)
4904                                         {
4905                                                 dead = true;
4906                                                 continue;
4907                                         }
4908
4909                                         if (TrafficLogFile != NULL)
4910                                         {
4911                                                 (void) sm_io_fprintf(TrafficLogFile,
4912                                                                      SM_TIME_DEFAULT,
4913                                                                      "!%s",
4914                                                                      mci->mci_mailer->m_eol);
4915                                         }
4916                                         ostate = OSTATE_HEAD;
4917                                         SM_ASSERT(pbp < peekbuf +
4918                                                         sizeof(peekbuf));
4919                                         *pbp++ = c;
4920                                         continue;
4921                                 }
4922                                 if (c == '\n')
4923                                 {
4924                                         if (TrafficLogFile != NULL)
4925                                                 (void) sm_io_fputs(TrafficLogFile,
4926                                                                    SM_TIME_DEFAULT,
4927                                                                    mci->mci_mailer->m_eol);
4928                                         if (sm_io_fputs(mci->mci_out,
4929                                                         SM_TIME_DEFAULT,
4930                                                         mci->mci_mailer->m_eol)
4931                                                         == SM_IO_EOF)
4932                                                 continue;
4933                                         pos = 0;
4934                                         ostate = OSTATE_HEAD;
4935                                 }
4936                                 else
4937                                 {
4938                                         if (TrafficLogFile != NULL)
4939                                                 (void) sm_io_putc(TrafficLogFile,
4940                                                                   SM_TIME_DEFAULT,
4941                                                                   (unsigned char) c);
4942                                         if (sm_io_putc(mci->mci_out,
4943                                                        SM_TIME_DEFAULT,
4944                                                        (unsigned char) c)
4945                                             == SM_IO_EOF)
4946                                         {
4947                                                 dead = true;
4948                                                 continue;
4949                                         }
4950                                         pos++;
4951                                         ostate = OSTATE_INLINE;
4952                                 }
4953                                 break;
4954                         }
4955                 }
4956
4957                 /* make sure we are at the beginning of a line */
4958                 if (bp > buf)
4959                 {
4960                         if (TrafficLogFile != NULL)
4961                         {
4962                                 for (xp = buf; xp < bp; xp++)
4963                                         (void) sm_io_putc(TrafficLogFile,
4964                                                           SM_TIME_DEFAULT,
4965                                                           (unsigned char) *xp);
4966                         }
4967                         for (xp = buf; xp < bp; xp++)
4968                         {
4969                                 if (sm_io_putc(mci->mci_out, SM_TIME_DEFAULT,
4970                                                (unsigned char) *xp)
4971                                     == SM_IO_EOF)
4972                                 {
4973                                         dead = true;
4974                                         break;
4975                                 }
4976                         }
4977                         pos += bp - buf;
4978                 }
4979                 if (!dead && pos > 0)
4980                 {
4981                         if (TrafficLogFile != NULL)
4982                                 (void) sm_io_fputs(TrafficLogFile,
4983                                                    SM_TIME_DEFAULT,
4984                                                    mci->mci_mailer->m_eol);
4985                         if (sm_io_fputs(mci->mci_out, SM_TIME_DEFAULT,
4986                                            mci->mci_mailer->m_eol) == SM_IO_EOF)
4987                                 goto writeerr;
4988                 }
4989         }
4990
4991         if (sm_io_error(e->e_dfp))
4992         {
4993                 syserr("putbody: %s/%cf%s: read error",
4994                        qid_printqueue(e->e_dfqgrp, e->e_dfqdir),
4995                        DATAFL_LETTER, e->e_id);
4996                 ExitStat = EX_IOERR;
4997                 ioerr = true;
4998         }
4999
5000 endofmessage:
5001         /*
5002         **  Since mailfile() uses e_dfp in a child process,
5003         **  the file offset in the stdio library for the
5004         **  parent process will not agree with the in-kernel
5005         **  file offset since the file descriptor is shared
5006         **  between the processes.  Therefore, it is vital
5007         **  that the file always be rewound.  This forces the
5008         **  kernel offset (lseek) and stdio library (ftell)
5009         **  offset to match.
5010         */
5011
5012         save_errno = errno;
5013         if (e->e_dfp != NULL)
5014                 (void) bfrewind(e->e_dfp);
5015
5016         /* some mailers want extra blank line at end of message */
5017         if (!dead && bitnset(M_BLANKEND, mci->mci_mailer->m_flags) &&
5018             buf[0] != '\0' && buf[0] != '\n')
5019         {
5020                 if (!putline("", mci))
5021                         goto writeerr;
5022         }
5023
5024         if (!dead &&
5025             (sm_io_flush(mci->mci_out, SM_TIME_DEFAULT) == SM_IO_EOF ||
5026              (sm_io_error(mci->mci_out) && errno != EPIPE)))
5027         {
5028                 save_errno = errno;
5029                 syserr("putbody: write error");
5030                 ExitStat = EX_IOERR;
5031                 ioerr = true;
5032         }
5033
5034         errno = save_errno;
5035         return !dead && !ioerr;
5036
5037   writeerr:
5038         return false;
5039 }
5040
5041 /*
5042 **  MAILFILE -- Send a message to a file.
5043 **
5044 **      If the file has the set-user-ID/set-group-ID bits set, but NO
5045 **      execute bits, sendmail will try to become the owner of that file
5046 **      rather than the real user.  Obviously, this only works if
5047 **      sendmail runs as root.
5048 **
5049 **      This could be done as a subordinate mailer, except that it
5050 **      is used implicitly to save messages in ~/dead.letter.  We
5051 **      view this as being sufficiently important as to include it
5052 **      here.  For example, if the system is dying, we shouldn't have
5053 **      to create another process plus some pipes to save the message.
5054 **
5055 **      Parameters:
5056 **              filename -- the name of the file to send to.
5057 **              mailer -- mailer definition for recipient -- if NULL,
5058 **                      use FileMailer.
5059 **              ctladdr -- the controlling address header -- includes
5060 **                      the userid/groupid to be when sending.
5061 **              sfflags -- flags for opening.
5062 **              e -- the current envelope.
5063 **
5064 **      Returns:
5065 **              The exit code associated with the operation.
5066 **
5067 **      Side Effects:
5068 **              none.
5069 */
5070
5071 # define RETURN(st)                     exit(st);
5072
5073 static jmp_buf  CtxMailfileTimeout;
5074
5075 int
5076 mailfile(filename, mailer, ctladdr, sfflags, e)
5077         char *volatile filename;
5078         MAILER *volatile mailer;
5079         ADDRESS *ctladdr;
5080         volatile long sfflags;
5081         register ENVELOPE *e;
5082 {
5083         register SM_FILE_T *f;
5084         register pid_t pid = -1;
5085         volatile int mode;
5086         int len;
5087         off_t curoff;
5088         bool suidwarn = geteuid() == 0;
5089         char *p;
5090         char *volatile realfile;
5091         SM_EVENT *ev;
5092         char buf[MAXPATHLEN];
5093         char targetfile[MAXPATHLEN];
5094
5095         if (tTd(11, 1))
5096         {
5097                 sm_dprintf("mailfile %s\n  ctladdr=", filename);
5098                 printaddr(sm_debug_file(), ctladdr, false);
5099         }
5100
5101         if (mailer == NULL)
5102                 mailer = FileMailer;
5103
5104         if (e->e_xfp != NULL)
5105                 (void) sm_io_flush(e->e_xfp, SM_TIME_DEFAULT);
5106
5107         /*
5108         **  Special case /dev/null.  This allows us to restrict file
5109         **  delivery to regular files only.
5110         */
5111
5112         if (sm_path_isdevnull(filename))
5113                 return EX_OK;
5114
5115         /* check for 8-bit available */
5116         if (bitset(EF_HAS8BIT, e->e_flags) &&
5117             bitnset(M_7BITS, mailer->m_flags) &&
5118             (bitset(EF_DONT_MIME, e->e_flags) ||
5119              !(bitset(MM_MIME8BIT, MimeMode) ||
5120                (bitset(EF_IS_MIME, e->e_flags) &&
5121                 bitset(MM_CVTMIME, MimeMode)))))
5122         {
5123                 e->e_status = "5.6.3";
5124                 usrerrenh(e->e_status,
5125                           "554 Cannot send 8-bit data to 7-bit destination");
5126                 errno = 0;
5127                 return EX_DATAERR;
5128         }
5129
5130         /* Find the actual file */
5131         if (SafeFileEnv != NULL && SafeFileEnv[0] != '\0')
5132         {
5133                 len = strlen(SafeFileEnv);
5134
5135                 if (strncmp(SafeFileEnv, filename, len) == 0)
5136                         filename += len;
5137
5138                 if (len + strlen(filename) + 1 >= sizeof targetfile)
5139                 {
5140                         syserr("mailfile: filename too long (%s/%s)",
5141                                SafeFileEnv, filename);
5142                         return EX_CANTCREAT;
5143                 }
5144                 (void) sm_strlcpy(targetfile, SafeFileEnv, sizeof targetfile);
5145                 realfile = targetfile + len;
5146                 if (*filename == '/')
5147                         filename++;
5148                 if (*filename != '\0')
5149                 {
5150                         /* paranoia: trailing / should be removed in readcf */
5151                         if (targetfile[len - 1] != '/')
5152                                 (void) sm_strlcat(targetfile,
5153                                                   "/", sizeof targetfile);
5154                         (void) sm_strlcat(targetfile, filename,
5155                                           sizeof targetfile);
5156                 }
5157         }
5158         else if (mailer->m_rootdir != NULL)
5159         {
5160                 expand(mailer->m_rootdir, targetfile, sizeof targetfile, e);
5161                 len = strlen(targetfile);
5162
5163                 if (strncmp(targetfile, filename, len) == 0)
5164                         filename += len;
5165
5166                 if (len + strlen(filename) + 1 >= sizeof targetfile)
5167                 {
5168                         syserr("mailfile: filename too long (%s/%s)",
5169                                targetfile, filename);
5170                         return EX_CANTCREAT;
5171                 }
5172                 realfile = targetfile + len;
5173                 if (targetfile[len - 1] != '/')
5174                         (void) sm_strlcat(targetfile, "/", sizeof targetfile);
5175                 if (*filename == '/')
5176                         (void) sm_strlcat(targetfile, filename + 1,
5177                                           sizeof targetfile);
5178                 else
5179                         (void) sm_strlcat(targetfile, filename,
5180                                           sizeof targetfile);
5181         }
5182         else
5183         {
5184                 if (sm_strlcpy(targetfile, filename, sizeof targetfile) >=
5185                     sizeof targetfile)
5186                 {
5187                         syserr("mailfile: filename too long (%s)", filename);
5188                         return EX_CANTCREAT;
5189                 }
5190                 realfile = targetfile;
5191         }
5192
5193         /*
5194         **  Fork so we can change permissions here.
5195         **      Note that we MUST use fork, not vfork, because of
5196         **      the complications of calling subroutines, etc.
5197         */
5198
5199
5200         /*
5201         **  Dispose of SIGCHLD signal catchers that may be laying
5202         **  around so that the waitfor() below will get it.
5203         */
5204
5205         (void) sm_signal(SIGCHLD, SIG_DFL);
5206
5207         DOFORK(fork);
5208
5209         if (pid < 0)
5210                 return EX_OSERR;
5211         else if (pid == 0)
5212         {
5213                 /* child -- actually write to file */
5214                 struct stat stb;
5215                 MCI mcibuf;
5216                 int err;
5217                 volatile int oflags = O_WRONLY|O_APPEND;
5218
5219                 /* Reset global flags */
5220                 RestartRequest = NULL;
5221                 RestartWorkGroup = false;
5222                 ShutdownRequest = NULL;
5223                 PendingSignal = 0;
5224                 CurrentPid = getpid();
5225
5226                 if (e->e_lockfp != NULL)
5227                 {
5228                         int fd;
5229
5230                         fd = sm_io_getinfo(e->e_lockfp, SM_IO_WHAT_FD, NULL);
5231                         /* SM_ASSERT(fd >= 0); */
5232                         if (fd >= 0)
5233                                 (void) close(fd);
5234                 }
5235
5236                 (void) sm_signal(SIGINT, SIG_DFL);
5237                 (void) sm_signal(SIGHUP, SIG_DFL);
5238                 (void) sm_signal(SIGTERM, SIG_DFL);
5239                 (void) umask(OldUmask);
5240                 e->e_to = filename;
5241                 ExitStat = EX_OK;
5242
5243                 if (setjmp(CtxMailfileTimeout) != 0)
5244                 {
5245                         RETURN(EX_TEMPFAIL);
5246                 }
5247
5248                 if (TimeOuts.to_fileopen > 0)
5249                         ev = sm_setevent(TimeOuts.to_fileopen, mailfiletimeout,
5250                                          0);
5251                 else
5252                         ev = NULL;
5253
5254                 /* check file mode to see if set-user-ID */
5255                 if (stat(targetfile, &stb) < 0)
5256                         mode = FileMode;
5257                 else
5258                         mode = stb.st_mode;
5259
5260                 /* limit the errors to those actually caused in the child */
5261                 errno = 0;
5262                 ExitStat = EX_OK;
5263
5264                 /* Allow alias expansions to use the S_IS{U,G}ID bits */
5265                 if ((ctladdr != NULL && !bitset(QALIAS, ctladdr->q_flags)) ||
5266                     bitset(SFF_RUNASREALUID, sfflags))
5267                 {
5268                         /* ignore set-user-ID and set-group-ID bits */
5269                         mode &= ~(S_ISGID|S_ISUID);
5270                         if (tTd(11, 20))
5271                                 sm_dprintf("mailfile: ignoring set-user-ID/set-group-ID bits\n");
5272                 }
5273
5274                 /* we have to open the data file BEFORE setuid() */
5275                 if (e->e_dfp == NULL && bitset(EF_HAS_DF, e->e_flags))
5276                 {
5277                         char *df = queuename(e, DATAFL_LETTER);
5278
5279                         e->e_dfp = sm_io_open(SmFtStdio, SM_TIME_DEFAULT, df,
5280                                               SM_IO_RDONLY_B, NULL);
5281                         if (e->e_dfp == NULL)
5282                         {
5283                                 syserr("mailfile: Cannot open %s for %s from %s",
5284                                         df, e->e_to, e->e_from.q_paddr);
5285                         }
5286                 }
5287
5288                 /* select a new user to run as */
5289                 if (!bitset(SFF_RUNASREALUID, sfflags))
5290                 {
5291                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5292                         {
5293                                 RealUserName = NULL;
5294                                 if (mailer->m_uid == NO_UID)
5295                                         RealUid = RunAsUid;
5296                                 else
5297                                         RealUid = mailer->m_uid;
5298                                 if (RunAsUid != 0 && RealUid != RunAsUid)
5299                                 {
5300                                         /* Only root can change the uid */
5301                                         syserr("mailfile: insufficient privileges to change uid, RunAsUid=%d, RealUid=%d",
5302                                                 (int) RunAsUid, (int) RealUid);
5303                                         RETURN(EX_TEMPFAIL);
5304                                 }
5305                         }
5306                         else if (bitset(S_ISUID, mode))
5307                         {
5308                                 RealUserName = NULL;
5309                                 RealUid = stb.st_uid;
5310                         }
5311                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5312                         {
5313                                 if (ctladdr->q_ruser != NULL)
5314                                         RealUserName = ctladdr->q_ruser;
5315                                 else
5316                                         RealUserName = ctladdr->q_user;
5317                                 RealUid = ctladdr->q_uid;
5318                         }
5319                         else if (mailer != NULL && mailer->m_uid != NO_UID)
5320                         {
5321                                 RealUserName = DefUser;
5322                                 RealUid = mailer->m_uid;
5323                         }
5324                         else
5325                         {
5326                                 RealUserName = DefUser;
5327                                 RealUid = DefUid;
5328                         }
5329
5330                         /* select a new group to run as */
5331                         if (bitnset(M_SPECIFIC_UID, mailer->m_flags))
5332                         {
5333                                 if (mailer->m_gid == NO_GID)
5334                                         RealGid = RunAsGid;
5335                                 else
5336                                         RealGid = mailer->m_gid;
5337                                 if (RunAsUid != 0 &&
5338                                     (RealGid != getgid() ||
5339                                      RealGid != getegid()))
5340                                 {
5341                                         /* Only root can change the gid */
5342                                         syserr("mailfile: insufficient privileges to change gid, RealGid=%d, RunAsUid=%d, gid=%d, egid=%d",
5343                                                (int) RealGid, (int) RunAsUid,
5344                                                (int) getgid(), (int) getegid());
5345                                         RETURN(EX_TEMPFAIL);
5346                                 }
5347                         }
5348                         else if (bitset(S_ISGID, mode))
5349                                 RealGid = stb.st_gid;
5350                         else if (ctladdr != NULL &&
5351                                  ctladdr->q_uid == DefUid &&
5352                                  ctladdr->q_gid == 0)
5353                         {
5354                                 /*
5355                                 **  Special case:  This means it is an
5356                                 **  alias and we should act as DefaultUser.
5357                                 **  See alias()'s comments.
5358                                 */
5359
5360                                 RealGid = DefGid;
5361                                 RealUserName = DefUser;
5362                         }
5363                         else if (ctladdr != NULL && ctladdr->q_uid != 0)
5364                                 RealGid = ctladdr->q_gid;
5365                         else if (mailer != NULL && mailer->m_gid != NO_GID)
5366                                 RealGid = mailer->m_gid;
5367                         else
5368                                 RealGid = DefGid;
5369                 }
5370
5371                 /* last ditch */
5372                 if (!bitset(SFF_ROOTOK, sfflags))
5373                 {
5374                         if (RealUid == 0)
5375                                 RealUid = DefUid;
5376                         if (RealGid == 0)
5377                                 RealGid = DefGid;
5378                 }
5379
5380                 /* set group id list (needs /etc/group access) */
5381                 if (RealUserName != NULL && !DontInitGroups)
5382                 {
5383                         if (initgroups(RealUserName, RealGid) == -1 && suidwarn)
5384                         {
5385                                 syserr("mailfile: initgroups(%s, %d) failed",
5386                                         RealUserName, RealGid);
5387                                 RETURN(EX_TEMPFAIL);
5388                         }
5389                 }
5390                 else
5391                 {
5392                         GIDSET_T gidset[1];
5393
5394                         gidset[0] = RealGid;
5395                         if (setgroups(1, gidset) == -1 && suidwarn)
5396                         {
5397                                 syserr("mailfile: setgroups() failed");
5398                                 RETURN(EX_TEMPFAIL);
5399                         }
5400                 }
5401
5402                 /*
5403                 **  If you have a safe environment, go into it.
5404                 */
5405
5406                 if (realfile != targetfile)
5407                 {
5408                         char save;
5409
5410                         save = *realfile;
5411                         *realfile = '\0';
5412                         if (tTd(11, 20))
5413                                 sm_dprintf("mailfile: chroot %s\n", targetfile);
5414                         if (chroot(targetfile) < 0)
5415                         {
5416                                 syserr("mailfile: Cannot chroot(%s)",
5417                                        targetfile);
5418                                 RETURN(EX_CANTCREAT);
5419                         }
5420                         *realfile = save;
5421                 }
5422
5423                 if (tTd(11, 40))
5424                         sm_dprintf("mailfile: deliver to %s\n", realfile);
5425
5426                 if (chdir("/") < 0)
5427                 {
5428                         syserr("mailfile: cannot chdir(/)");
5429                         RETURN(EX_CANTCREAT);
5430                 }
5431
5432                 /* now reset the group and user ids */
5433                 endpwent();
5434                 sm_mbdb_terminate();
5435                 if (setgid(RealGid) < 0 && suidwarn)
5436                 {
5437                         syserr("mailfile: setgid(%ld) failed", (long) RealGid);
5438                         RETURN(EX_TEMPFAIL);
5439                 }
5440                 vendor_set_uid(RealUid);
5441                 if (setuid(RealUid) < 0 && suidwarn)
5442                 {
5443                         syserr("mailfile: setuid(%ld) failed", (long) RealUid);
5444                         RETURN(EX_TEMPFAIL);
5445                 }
5446
5447                 if (tTd(11, 2))
5448                         sm_dprintf("mailfile: running as r/euid=%d/%d, r/egid=%d/%d\n",
5449                                 (int) getuid(), (int) geteuid(),
5450                                 (int) getgid(), (int) getegid());
5451
5452
5453                 /* move into some "safe" directory */
5454                 if (mailer->m_execdir != NULL)
5455                 {
5456                         char *q;
5457
5458                         for (p = mailer->m_execdir; p != NULL; p = q)
5459                         {
5460                                 q = strchr(p, ':');
5461                                 if (q != NULL)
5462                                         *q = '\0';
5463                                 expand(p, buf, sizeof buf, e);
5464                                 if (q != NULL)
5465                                         *q++ = ':';
5466                                 if (tTd(11, 20))
5467                                         sm_dprintf("mailfile: trydir %s\n",
5468                                                    buf);
5469                                 if (buf[0] != '\0' && chdir(buf) >= 0)
5470                                         break;
5471                         }
5472                 }
5473
5474                 /*
5475                 **  Recheck the file after we have assumed the ID of the
5476                 **  delivery user to make sure we can deliver to it as
5477                 **  that user.  This is necessary if sendmail is running
5478                 **  as root and the file is on an NFS mount which treats
5479                 **  root as nobody.
5480                 */
5481
5482 #if HASLSTAT
5483                 if (bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5484                         err = stat(realfile, &stb);
5485                 else
5486                         err = lstat(realfile, &stb);
5487 #else /* HASLSTAT */
5488                 err = stat(realfile, &stb);
5489 #endif /* HASLSTAT */
5490
5491                 if (err < 0)
5492                 {
5493                         stb.st_mode = ST_MODE_NOFILE;
5494                         mode = FileMode;
5495                         oflags |= O_CREAT|O_EXCL;
5496                 }
5497                 else if (bitset(S_IXUSR|S_IXGRP|S_IXOTH, mode) ||
5498                          (!bitnset(DBS_FILEDELIVERYTOHARDLINK,
5499                                    DontBlameSendmail) &&
5500                           stb.st_nlink != 1) ||
5501                          (realfile != targetfile && !S_ISREG(mode)))
5502                         exit(EX_CANTCREAT);
5503                 else
5504                         mode = stb.st_mode;
5505
5506                 if (!bitnset(DBS_FILEDELIVERYTOSYMLINK, DontBlameSendmail))
5507                         sfflags |= SFF_NOSLINK;
5508                 if (!bitnset(DBS_FILEDELIVERYTOHARDLINK, DontBlameSendmail))
5509                         sfflags |= SFF_NOHLINK;
5510                 sfflags &= ~SFF_OPENASROOT;
5511                 f = safefopen(realfile, oflags, mode, sfflags);
5512                 if (f == NULL)
5513                 {
5514                         if (transienterror(errno))
5515                         {
5516                                 usrerr("454 4.3.0 cannot open %s: %s",
5517                                        shortenstring(realfile, MAXSHORTSTR),
5518                                        sm_errstring(errno));
5519                                 RETURN(EX_TEMPFAIL);
5520                         }
5521                         else
5522                         {
5523                                 usrerr("554 5.3.0 cannot open %s: %s",
5524                                        shortenstring(realfile, MAXSHORTSTR),
5525                                        sm_errstring(errno));
5526                                 RETURN(EX_CANTCREAT);
5527                         }
5528                 }
5529                 if (filechanged(realfile, sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5530                     &stb))
5531                 {
5532                         syserr("554 5.3.0 file changed after open");
5533                         RETURN(EX_CANTCREAT);
5534                 }
5535                 if (fstat(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL), &stb) < 0)
5536                 {
5537                         syserr("554 5.3.0 cannot fstat %s",
5538                                 sm_errstring(errno));
5539                         RETURN(EX_CANTCREAT);
5540                 }
5541
5542                 curoff = stb.st_size;
5543
5544                 if (ev != NULL)
5545                         sm_clrevent(ev);
5546
5547                 memset(&mcibuf, '\0', sizeof mcibuf);
5548                 mcibuf.mci_mailer = mailer;
5549                 mcibuf.mci_out = f;
5550                 if (bitnset(M_7BITS, mailer->m_flags))
5551                         mcibuf.mci_flags |= MCIF_7BIT;
5552
5553                 /* clear out per-message flags from connection structure */
5554                 mcibuf.mci_flags &= ~(MCIF_CVT7TO8|MCIF_CVT8TO7);
5555
5556                 if (bitset(EF_HAS8BIT, e->e_flags) &&
5557                     !bitset(EF_DONT_MIME, e->e_flags) &&
5558                     bitnset(M_7BITS, mailer->m_flags))
5559                         mcibuf.mci_flags |= MCIF_CVT8TO7;
5560
5561 #if MIME7TO8
5562                 if (bitnset(M_MAKE8BIT, mailer->m_flags) &&
5563                     !bitset(MCIF_7BIT, mcibuf.mci_flags) &&
5564                     (p = hvalue("Content-Transfer-Encoding", e->e_header)) != NULL &&
5565                     (sm_strcasecmp(p, "quoted-printable") == 0 ||
5566                      sm_strcasecmp(p, "base64") == 0) &&
5567                     (p = hvalue("Content-Type", e->e_header)) != NULL)
5568                 {
5569                         /* may want to convert 7 -> 8 */
5570                         /* XXX should really parse it here -- and use a class XXX */
5571                         if (sm_strncasecmp(p, "text/plain", 10) == 0 &&
5572                             (p[10] == '\0' || p[10] == ' ' || p[10] == ';'))
5573                                 mcibuf.mci_flags |= MCIF_CVT7TO8;
5574                 }
5575 #endif /* MIME7TO8 */
5576
5577                 if (!putfromline(&mcibuf, e) ||
5578                     !(*e->e_puthdr)(&mcibuf, e->e_header, e, M87F_OUTER) ||
5579                     !(*e->e_putbody)(&mcibuf, e, NULL) ||
5580                     !putline("\n", &mcibuf) ||
5581                     (sm_io_flush(f, SM_TIME_DEFAULT) != 0 ||
5582                     (SuperSafe != SAFE_NO &&
5583                      fsync(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL)) < 0) ||
5584                     sm_io_error(f)))
5585                 {
5586                         setstat(EX_IOERR);
5587 #if !NOFTRUNCATE
5588                         (void) ftruncate(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5589                                          curoff);
5590 #endif /* !NOFTRUNCATE */
5591                 }
5592
5593                 /* reset ISUID & ISGID bits for paranoid systems */
5594 #if HASFCHMOD
5595                 (void) fchmod(sm_io_getinfo(f, SM_IO_WHAT_FD, NULL),
5596                               (MODE_T) mode);
5597 #else /* HASFCHMOD */
5598                 (void) chmod(filename, (MODE_T) mode);
5599 #endif /* HASFCHMOD */
5600                 if (sm_io_close(f, SM_TIME_DEFAULT) < 0)
5601                         setstat(EX_IOERR);
5602                 (void) sm_io_flush(smioout, SM_TIME_DEFAULT);
5603                 (void) setuid(RealUid);
5604                 exit(ExitStat);
5605                 /* NOTREACHED */
5606         }
5607         else
5608         {
5609                 /* parent -- wait for exit status */
5610                 int st;
5611
5612                 st = waitfor(pid);
5613                 if (st == -1)
5614                 {
5615                         syserr("mailfile: %s: wait", mailer->m_name);
5616                         return EX_SOFTWARE;
5617                 }
5618                 if (WIFEXITED(st))
5619                 {
5620                         errno = 0;
5621                         return (WEXITSTATUS(st));
5622                 }
5623                 else
5624                 {
5625                         syserr("mailfile: %s: child died on signal %d",
5626                                mailer->m_name, st);
5627                         return EX_UNAVAILABLE;
5628                 }
5629                 /* NOTREACHED */
5630         }
5631         return EX_UNAVAILABLE;  /* avoid compiler warning on IRIX */
5632 }
5633
5634 static void
5635 mailfiletimeout(ignore)
5636         int ignore;
5637 {
5638         /*
5639         **  NOTE: THIS CAN BE CALLED FROM A SIGNAL HANDLER.  DO NOT ADD
5640         **      ANYTHING TO THIS ROUTINE UNLESS YOU KNOW WHAT YOU ARE
5641         **      DOING.
5642         */
5643
5644         errno = ETIMEDOUT;
5645         longjmp(CtxMailfileTimeout, 1);
5646 }
5647 /*
5648 **  HOSTSIGNATURE -- return the "signature" for a host.
5649 **
5650 **      The signature describes how we are going to send this -- it
5651 **      can be just the hostname (for non-Internet hosts) or can be
5652 **      an ordered list of MX hosts.
5653 **
5654 **      Parameters:
5655 **              m -- the mailer describing this host.
5656 **              host -- the host name.
5657 **
5658 **      Returns:
5659 **              The signature for this host.
5660 **
5661 **      Side Effects:
5662 **              Can tweak the symbol table.
5663 */
5664
5665 #define MAXHOSTSIGNATURE        8192    /* max len of hostsignature */
5666
5667 char *
5668 hostsignature(m, host)
5669         register MAILER *m;
5670         char *host;
5671 {
5672         register char *p;
5673         register STAB *s;
5674         time_t now;
5675 #if NAMED_BIND
5676         char sep = ':';
5677         char prevsep = ':';
5678         int i;
5679         int len;
5680         int nmx;
5681         int hl;
5682         char *hp;
5683         char *endp;
5684         int oldoptions = _res.options;
5685         char *mxhosts[MAXMXHOSTS + 1];
5686         unsigned short mxprefs[MAXMXHOSTS + 1];
5687 #endif /* NAMED_BIND */
5688
5689         if (tTd(17, 3))
5690                 sm_dprintf("hostsignature(%s)\n", host);
5691
5692         /*
5693         **  If local delivery (and not remote), just return a constant.
5694         */
5695
5696         if (bitnset(M_LOCALMAILER, m->m_flags) &&
5697             strcmp(m->m_mailer, "[IPC]") != 0 &&
5698             !(m->m_argv[0] != NULL && strcmp(m->m_argv[0], "TCP") == 0))
5699                 return "localhost";
5700
5701         /* an empty host does not have MX records */
5702         if (*host == '\0')
5703                 return "_empty_";
5704
5705         /*
5706         **  Check to see if this uses IPC -- if not, it can't have MX records.
5707         */
5708
5709         if (strcmp(m->m_mailer, "[IPC]") != 0 ||
5710             CurEnv->e_sendmode == SM_DEFER)
5711         {
5712                 /* just an ordinary mailer or deferred mode */
5713                 return host;
5714         }
5715 #if NETUNIX
5716         else if (m->m_argv[0] != NULL &&
5717                  strcmp(m->m_argv[0], "FILE") == 0)
5718         {
5719                 /* rendezvous in the file system, no MX records */
5720                 return host;
5721         }
5722 #endif /* NETUNIX */
5723
5724         /*
5725         **  Look it up in the symbol table.
5726         */
5727
5728         now = curtime();
5729         s = stab(host, ST_HOSTSIG, ST_ENTER);
5730         if (s->s_hostsig.hs_sig != NULL)
5731         {
5732                 if (s->s_hostsig.hs_exp >= now)
5733                 {
5734                         if (tTd(17, 3))
5735                                 sm_dprintf("hostsignature(): stab(%s) found %s\n", host,
5736                                            s->s_hostsig.hs_sig);
5737                         return s->s_hostsig.hs_sig;
5738                 }
5739
5740                 /* signature is expired: clear it */
5741                 sm_free(s->s_hostsig.hs_sig);
5742                 s->s_hostsig.hs_sig = NULL;
5743         }
5744
5745         /* set default TTL */
5746         s->s_hostsig.hs_exp = now + SM_DEFAULT_TTL;
5747
5748         /*
5749         **  Not already there or expired -- create a signature.
5750         */
5751
5752 #if NAMED_BIND
5753         if (ConfigLevel < 2)
5754                 _res.options &= ~(RES_DEFNAMES | RES_DNSRCH);   /* XXX */
5755
5756         for (hp = host; hp != NULL; hp = endp)
5757         {
5758 #if NETINET6
5759                 if (*hp == '[')
5760                 {
5761                         endp = strchr(hp + 1, ']');
5762                         if (endp != NULL)
5763                                 endp = strpbrk(endp + 1, ":,");
5764                 }
5765                 else
5766                         endp = strpbrk(hp, ":,");
5767 #else /* NETINET6 */
5768                 endp = strpbrk(hp, ":,");
5769 #endif /* NETINET6 */
5770                 if (endp != NULL)
5771                 {
5772                         sep = *endp;
5773                         *endp = '\0';
5774                 }
5775
5776                 if (bitnset(M_NOMX, m->m_flags))
5777                 {
5778                         /* skip MX lookups */
5779                         nmx = 1;
5780                         mxhosts[0] = hp;
5781                 }
5782                 else
5783                 {
5784                         auto int rcode;
5785                         int ttl;
5786
5787                         nmx = getmxrr(hp, mxhosts, mxprefs, true, &rcode, true,
5788                                       &ttl);
5789                         if (nmx <= 0)
5790                         {
5791                                 int save_errno;
5792                                 register MCI *mci;
5793
5794                                 /* update the connection info for this host */
5795                                 save_errno = errno;
5796                                 mci = mci_get(hp, m);
5797                                 mci->mci_errno = save_errno;
5798                                 mci->mci_herrno = h_errno;
5799                                 mci->mci_lastuse = now;
5800                                 if (rcode == EX_NOHOST)
5801                                         mci_setstat(mci, rcode, "5.1.2",
5802                                                     "550 Host unknown");
5803                                 else
5804                                         mci_setstat(mci, rcode, NULL, NULL);
5805
5806                                 /* use the original host name as signature */
5807                                 nmx = 1;
5808                                 mxhosts[0] = hp;
5809                         }
5810                         if (tTd(17, 3))
5811                                 sm_dprintf("hostsignature(): getmxrr() returned %d, mxhosts[0]=%s\n",
5812                                            nmx, mxhosts[0]);
5813
5814                         /*
5815                         **  Set new TTL: we use only one!
5816                         **      We could try to use the minimum instead.
5817                         */
5818
5819                         s->s_hostsig.hs_exp = now + SM_MIN(ttl, SM_DEFAULT_TTL);
5820                 }
5821
5822                 len = 0;
5823                 for (i = 0; i < nmx; i++)
5824                         len += strlen(mxhosts[i]) + 1;
5825                 if (s->s_hostsig.hs_sig != NULL)
5826                         len += strlen(s->s_hostsig.hs_sig) + 1;
5827                 if (len < 0 || len >= MAXHOSTSIGNATURE)
5828                 {
5829                         sm_syslog(LOG_WARNING, NOQID, "hostsignature for host '%s' exceeds maxlen (%d): %d",
5830                                   host, MAXHOSTSIGNATURE, len);
5831                         len = MAXHOSTSIGNATURE;
5832                 }
5833                 p = sm_pmalloc_x(len);
5834                 if (s->s_hostsig.hs_sig != NULL)
5835                 {
5836                         (void) sm_strlcpy(p, s->s_hostsig.hs_sig, len);
5837                         sm_free(s->s_hostsig.hs_sig); /* XXX */
5838                         s->s_hostsig.hs_sig = p;
5839                         hl = strlen(p);
5840                         p += hl;
5841                         *p++ = prevsep;
5842                         len -= hl + 1;
5843                 }
5844                 else
5845                         s->s_hostsig.hs_sig = p;
5846                 for (i = 0; i < nmx; i++)
5847                 {
5848                         hl = strlen(mxhosts[i]);
5849                         if (len - 1 < hl || len <= 1)
5850                         {
5851                                 /* force to drop out of outer loop */
5852                                 len = -1;
5853                                 break;
5854                         }
5855                         if (i != 0)
5856                         {
5857                                 if (mxprefs[i] == mxprefs[i - 1])
5858                                         *p++ = ',';
5859                                 else
5860                                         *p++ = ':';
5861                                 len--;
5862                         }
5863                         (void) sm_strlcpy(p, mxhosts[i], len);
5864                         p += hl;
5865                         len -= hl;
5866                 }
5867
5868                 /*
5869                 **  break out of loop if len exceeded MAXHOSTSIGNATURE
5870                 **  because we won't have more space for further hosts
5871                 **  anyway (separated by : in the .cf file).
5872                 */
5873
5874                 if (len < 0)
5875                         break;
5876                 if (endp != NULL)
5877                         *endp++ = sep;
5878                 prevsep = sep;
5879         }
5880         makelower(s->s_hostsig.hs_sig);
5881         if (ConfigLevel < 2)
5882                 _res.options = oldoptions;
5883 #else /* NAMED_BIND */
5884         /* not using BIND -- the signature is just the host name */
5885         /*
5886         **  'host' points to storage that will be freed after we are
5887         **  done processing the current envelope, so we copy it.
5888         */
5889         s->s_hostsig.hs_sig = sm_pstrdup_x(host);
5890 #endif /* NAMED_BIND */
5891         if (tTd(17, 1))
5892                 sm_dprintf("hostsignature(%s) = %s\n", host, s->s_hostsig.hs_sig);
5893         return s->s_hostsig.hs_sig;
5894 }
5895 /*
5896 **  PARSE_HOSTSIGNATURE -- parse the "signature" and return MX host array.
5897 **
5898 **      The signature describes how we are going to send this -- it
5899 **      can be just the hostname (for non-Internet hosts) or can be
5900 **      an ordered list of MX hosts which must be randomized for equal
5901 **      MX preference values.
5902 **
5903 **      Parameters:
5904 **              sig -- the host signature.
5905 **              mxhosts -- array to populate.
5906 **              mailer -- mailer.
5907 **
5908 **      Returns:
5909 **              The number of hosts inserted into mxhosts array.
5910 **
5911 **      Side Effects:
5912 **              Randomizes equal MX preference hosts in mxhosts.
5913 */
5914
5915 static int
5916 parse_hostsignature(sig, mxhosts, mailer)
5917         char *sig;
5918         char **mxhosts;
5919         MAILER *mailer;
5920 {
5921         unsigned short curpref = 0;
5922         int nmx = 0, i, j;      /* NOTE: i, j, and nmx must have same type */
5923         char *hp, *endp;
5924         unsigned short prefer[MAXMXHOSTS];
5925         long rndm[MAXMXHOSTS];
5926
5927         for (hp = sig; hp != NULL; hp = endp)
5928         {
5929                 char sep = ':';
5930
5931 #if NETINET6
5932                 if (*hp == '[')
5933                 {
5934                         endp = strchr(hp + 1, ']');
5935                         if (endp != NULL)
5936                                 endp = strpbrk(endp + 1, ":,");
5937                 }
5938                 else
5939                         endp = strpbrk(hp, ":,");
5940 #else /* NETINET6 */
5941                 endp = strpbrk(hp, ":,");
5942 #endif /* NETINET6 */
5943                 if (endp != NULL)
5944                 {
5945                         sep = *endp;
5946                         *endp = '\0';
5947                 }
5948
5949                 mxhosts[nmx] = hp;
5950                 prefer[nmx] = curpref;
5951                 if (mci_match(hp, mailer))
5952                         rndm[nmx] = 0;
5953                 else
5954                         rndm[nmx] = get_random();
5955
5956                 if (endp != NULL)
5957                 {
5958                         /*
5959                         **  Since we don't have the original MX prefs,
5960                         **  make our own.  If the separator is a ':', that
5961                         **  means the preference for the next host will be
5962                         **  higher than this one, so simply increment curpref.
5963                         */
5964
5965                         if (sep == ':')
5966                                 curpref++;
5967
5968                         *endp++ = sep;
5969                 }
5970                 if (++nmx >= MAXMXHOSTS)
5971                         break;
5972         }
5973
5974         /* sort the records using the random factor for equal preferences */
5975         for (i = 0; i < nmx; i++)
5976         {
5977                 for (j = i + 1; j < nmx; j++)
5978                 {
5979                         /*
5980                         **  List is already sorted by MX preference, only
5981                         **  need to look for equal preference MX records
5982                         */
5983
5984                         if (prefer[i] < prefer[j])
5985                                 break;
5986
5987                         if (prefer[i] > prefer[j] ||
5988                             (prefer[i] == prefer[j] && rndm[i] > rndm[j]))
5989                         {
5990                                 register unsigned short tempp;
5991                                 register long tempr;
5992                                 register char *temp1;
5993
5994                                 tempp = prefer[i];
5995                                 prefer[i] = prefer[j];
5996                                 prefer[j] = tempp;
5997                                 temp1 = mxhosts[i];
5998                                 mxhosts[i] = mxhosts[j];
5999                                 mxhosts[j] = temp1;
6000                                 tempr = rndm[i];
6001                                 rndm[i] = rndm[j];
6002                                 rndm[j] = tempr;
6003                         }
6004                 }
6005         }
6006         return nmx;
6007 }
6008
6009 # if STARTTLS
6010 static SSL_CTX  *clt_ctx = NULL;
6011 static bool     tls_ok_clt = true;
6012
6013 /*
6014 **  SETCLTTLS -- client side TLS: allow/disallow.
6015 **
6016 **      Parameters:
6017 **              tls_ok -- should tls be done?
6018 **
6019 **      Returns:
6020 **              none.
6021 **
6022 **      Side Effects:
6023 **              sets tls_ok_clt (static variable in this module)
6024 */
6025
6026 void
6027 setclttls(tls_ok)
6028         bool tls_ok;
6029 {
6030         tls_ok_clt = tls_ok;
6031         return;
6032 }
6033 /*
6034 **  INITCLTTLS -- initialize client side TLS
6035 **
6036 **      Parameters:
6037 **              tls_ok -- should tls initialization be done?
6038 **
6039 **      Returns:
6040 **              succeeded?
6041 **
6042 **      Side Effects:
6043 **              sets tls_ok_clt (static variable in this module)
6044 */
6045
6046 bool
6047 initclttls(tls_ok)
6048         bool tls_ok;
6049 {
6050         if (!tls_ok_clt)
6051                 return false;
6052         tls_ok_clt = tls_ok;
6053         if (!tls_ok_clt)
6054                 return false;
6055         if (clt_ctx != NULL)
6056                 return true;    /* already done */
6057         tls_ok_clt = inittls(&clt_ctx, TLS_I_CLT, false, CltCertFile,
6058                              CltKeyFile, CACertPath, CACertFile, DHParams);
6059         return tls_ok_clt;
6060 }
6061
6062 /*
6063 **  STARTTLS -- try to start secure connection (client side)
6064 **
6065 **      Parameters:
6066 **              m -- the mailer.
6067 **              mci -- the mailer connection info.
6068 **              e -- the envelope.
6069 **
6070 **      Returns:
6071 **              success?
6072 **              (maybe this should be some other code than EX_
6073 **              that denotes which stage failed.)
6074 */
6075
6076 static int
6077 starttls(m, mci, e)
6078         MAILER *m;
6079         MCI *mci;
6080         ENVELOPE *e;
6081 {
6082         int smtpresult;
6083         int result = 0;
6084         int rfd, wfd;
6085         SSL *clt_ssl = NULL;
6086         time_t tlsstart;
6087
6088         if (clt_ctx == NULL && !initclttls(true))
6089                 return EX_TEMPFAIL;
6090         smtpmessage("STARTTLS", m, mci);
6091
6092         /* get the reply */
6093         smtpresult = reply(m, mci, e, TimeOuts.to_starttls, NULL, NULL,
6094                         XS_STARTTLS);
6095
6096         /* check return code from server */
6097         if (REPLYTYPE(smtpresult) == 4)
6098                 return EX_TEMPFAIL;
6099         if (smtpresult == 501)
6100                 return EX_USAGE;
6101         if (smtpresult == -1)
6102                 return smtpresult;
6103
6104         /* not an expected reply but we have to deal with it */
6105         if (REPLYTYPE(smtpresult) == 5)
6106                 return EX_UNAVAILABLE;
6107         if (smtpresult != 220)
6108                 return EX_PROTOCOL;
6109
6110         if (LogLevel > 13)
6111                 sm_syslog(LOG_INFO, NOQID, "STARTTLS=client, start=ok");
6112
6113         /* start connection */
6114         if ((clt_ssl = SSL_new(clt_ctx)) == NULL)
6115         {
6116                 if (LogLevel > 5)
6117                 {
6118                         sm_syslog(LOG_ERR, NOQID,
6119                                   "STARTTLS=client, error: SSL_new failed");
6120                         if (LogLevel > 9)
6121                                 tlslogerr("client");
6122                 }
6123                 return EX_SOFTWARE;
6124         }
6125
6126         rfd = sm_io_getinfo(mci->mci_in, SM_IO_WHAT_FD, NULL);
6127         wfd = sm_io_getinfo(mci->mci_out, SM_IO_WHAT_FD, NULL);
6128
6129         /* SSL_clear(clt_ssl); ? */
6130         if (rfd < 0 || wfd < 0 ||
6131             (result = SSL_set_rfd(clt_ssl, rfd)) != 1 ||
6132             (result = SSL_set_wfd(clt_ssl, wfd)) != 1)
6133         {
6134                 if (LogLevel > 5)
6135                 {
6136                         sm_syslog(LOG_ERR, NOQID,
6137                                   "STARTTLS=client, error: SSL_set_xfd failed=%d",
6138                                   result);
6139                         if (LogLevel > 9)
6140                                 tlslogerr("client");
6141                 }
6142                 return EX_SOFTWARE;
6143         }
6144         SSL_set_connect_state(clt_ssl);
6145         tlsstart = curtime();
6146
6147 ssl_retry:
6148         if ((result = SSL_connect(clt_ssl)) <= 0)
6149         {
6150                 int i, ssl_err;
6151
6152                 ssl_err = SSL_get_error(clt_ssl, result);
6153                 i = tls_retry(clt_ssl, rfd, wfd, tlsstart,
6154                         TimeOuts.to_starttls, ssl_err, "client");
6155                 if (i > 0)
6156                         goto ssl_retry;
6157
6158                 if (LogLevel > 5)
6159                 {
6160                         sm_syslog(LOG_WARNING, NOQID,
6161                                   "STARTTLS=client, error: connect failed=%d, SSL_error=%d, errno=%d, retry=%d",
6162                                   result, ssl_err, errno, i);
6163                         if (LogLevel > 8)
6164                                 tlslogerr("client");
6165                 }
6166
6167                 SSL_free(clt_ssl);
6168                 clt_ssl = NULL;
6169                 return EX_SOFTWARE;
6170         }
6171         mci->mci_ssl = clt_ssl;
6172         result = tls_get_info(mci->mci_ssl, false, mci->mci_host,
6173                               &mci->mci_macro, true);
6174
6175         /* switch to use TLS... */
6176         if (sfdctls(&mci->mci_in, &mci->mci_out, mci->mci_ssl) == 0)
6177                 return EX_OK;
6178
6179         /* failure */
6180         SSL_free(clt_ssl);
6181         clt_ssl = NULL;
6182         return EX_SOFTWARE;
6183 }
6184 /*
6185 **  ENDTLSCLT -- shutdown secure connection (client side)
6186 **
6187 **      Parameters:
6188 **              mci -- the mailer connection info.
6189 **
6190 **      Returns:
6191 **              success?
6192 */
6193
6194 static int
6195 endtlsclt(mci)
6196         MCI *mci;
6197 {
6198         int r;
6199
6200         if (!bitset(MCIF_TLSACT, mci->mci_flags))
6201                 return EX_OK;
6202         r = endtls(mci->mci_ssl, "client");
6203         mci->mci_flags &= ~MCIF_TLSACT;
6204         return r;
6205 }
6206 # endif /* STARTTLS */
6207 # if STARTTLS || SASL
6208 /*
6209 **  ISCLTFLGSET -- check whether client flag is set.
6210 **
6211 **      Parameters:
6212 **              e -- envelope.
6213 **              flag -- flag to check in {client_flags}
6214 **
6215 **      Returns:
6216 **              true iff flag is set.
6217 */
6218
6219 static bool
6220 iscltflgset(e, flag)
6221         ENVELOPE *e;
6222         int flag;
6223 {
6224         char *p;
6225
6226         p = macvalue(macid("{client_flags}"), e);
6227         if (p == NULL)
6228                 return false;
6229         for (; *p != '\0'; p++)
6230         {
6231                 /* look for just this one flag */
6232                 if (*p == (char) flag)
6233                         return true;
6234         }
6235         return false;
6236 }
6237 # endif /* STARTTLS || SASL */