libexec/dma/dma.c

   1 /*
   2  * Copyright (c) 2008 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de>.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/libexec/dma/dma.c,v 1.5 2008/09/30 17:47:21 swildner Exp $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/queue.h>
  39 #include <sys/stat.h>
  40 #include <sys/types.h>
  41 #include <sys/wait.h>
  42
  43 #include <dirent.h>
  44 #include <err.h>
  45 #include <errno.h>
  46 #include <fcntl.h>
  47 #include <inttypes.h>
  48 #include <netdb.h>
  49 #include <paths.h>
  50 #include <pwd.h>
  51 #include <signal.h>
  52 #include <stdarg.h>
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56 #include <syslog.h>
  57 #include <unistd.h>
  58
  59 #include "dma.h"
  60
  61
  62
  63 static void deliver(struct qitem *);
  64
  65 struct aliases aliases = LIST_HEAD_INITIALIZER(aliases);
  66 struct strlist tmpfs = SLIST_HEAD_INITIALIZER(tmpfs);
  67 struct virtusers virtusers = LIST_HEAD_INITIALIZER(virtusers);
  68 struct authusers authusers = LIST_HEAD_INITIALIZER(authusers);
  69 struct config *config;
  70 const char *username;
  71
  72 static int daemonize = 1;
  73 static const char *logident_base;
  74
  75 const char *
  76 hostname(void)
  77 {
  78         static char name[MAXHOSTNAMELEN+1];
  79         int initialized = 0;
  80         FILE *fp;
  81         size_t len;
  82
  83         if (initialized)
  84                 return (name);
  85
  86         if (config->mailname != NULL && config->mailname[0] != '\0') {
  87                 snprintf(name, sizeof(name), "%s", config->mailname);
  88                 initialized = 1;
  89                 return (name);
  90         }
  91         if (config->mailnamefile != NULL && config->mailnamefile[0] != '\0') {
  92                 fp = fopen(config->mailnamefile, "r");
  93                 if (fp != NULL) {
  94                         if (fgets(name, sizeof(name), fp) != NULL) {
  95                                 len = strlen(name);
  96                                 while (len > 0 &&
  97                                     (name[len - 1] == '\r' ||
  98                                      name[len - 1] == '\n'))
  99                                         name[--len] = '\0';
 100                                 if (name[0] != '\0') {
 101                                         initialized = 1;
 102                                         return (name);
 103                                 }
 104                         }
 105                         fclose(fp);
 106                 }
 107         }
 108         if (gethostname(name, sizeof(name)) != 0)
 109                 strcpy(name, "(unknown hostname)");
 110         initialized = 1;
 111         return name;
 112 }
 113
 114 static void
 115 setlogident(const char *fmt, ...)
 116 {
 117         char *tag = NULL;
 118
 119         if (fmt != NULL) {
 120                 va_list ap;
 121                 char *sufx;
 122
 123                 va_start(ap, fmt);
 124                 vasprintf(&sufx, fmt, ap);
 125                 if (sufx != NULL) {
 126                         asprintf(&tag, "%s[%s]", logident_base, sufx);
 127                         free(sufx);
 128                 }
 129                 va_end(ap);
 130         }
 131         closelog();
 132         openlog(tag != NULL ? tag : logident_base, 0, LOG_MAIL);
 133 }
 134
 135 static const char *
 136 check_username(const char *name, uid_t ckuid)
 137 {
 138         struct passwd *pwd;
 139
 140         if (name == NULL)
 141                 return (NULL);
 142         pwd = getpwnam(name);
 143         if (pwd == NULL || pwd->pw_uid != ckuid)
 144                 return (NULL);
 145         return (name);
 146 }
 147
 148 static void
 149 set_username(void)
 150 {
 151         struct passwd *pwd;
 152         char *u = NULL;
 153         uid_t uid;
 154
 155         uid = getuid();
 156         username = check_username(getlogin(), uid);
 157         if (username != NULL)
 158                 return;
 159         username = check_username(getenv("LOGNAME"), uid);
 160         if (username != NULL)
 161                 return;
 162         username = check_username(getenv("USER"), uid);
 163         if (username != NULL)
 164                 return;
 165         pwd = getpwuid(uid);
 166         if (pwd != NULL && pwd->pw_name != NULL && pwd->pw_name[0] != '\0' &&
 167             (u = strdup(pwd->pw_name)) != NULL) {
 168                 username = check_username(u, uid);
 169                 if (username != NULL)
 170                         return;
 171                 else
 172                         free(u);
 173         }
 174         asprintf(__DECONST(void *, &username), "%ld", (long)uid);
 175         if (username != NULL)
 176                 return;
 177         username = "unknown-or-invalid-username";
 178 }
 179
 180 static char *
 181 set_from(const char *osender)
 182 {
 183         struct virtuser *v;
 184         char *sender;
 185
 186         if ((config->features & VIRTUAL) != 0) {
 187                 SLIST_FOREACH(v, &virtusers, next) {
 188                         if (strcmp(v->login, username) == 0) {
 189                                 sender = strdup(v->address);
 190                                 if (sender == NULL)
 191                                         return(NULL);
 192                                 goto out;
 193                         }
 194                 }
 195         }
 196
 197         if (osender) {
 198                 sender = strdup(osender);
 199                 if (sender == NULL)
 200                         return (NULL);
 201         } else {
 202                 if (asprintf(&sender, "%s@%s", username, hostname()) <= 0)
 203                         return (NULL);
 204         }
 205
 206         if (strchr(sender, '\n') != NULL) {
 207                 errno = EINVAL;
 208                 return (NULL);
 209         }
 210
 211 out:
 212         return (sender);
 213 }
 214
 215 static int
 216 read_aliases(void)
 217 {
 218         yyin = fopen(config->aliases, "r");
 219         if (yyin == NULL)
 220                 return (0);     /* not fatal */
 221         if (yyparse())
 222                 return (-1);    /* fatal error, probably malloc() */
 223         fclose(yyin);
 224         return (0);
 225 }
 226
 227 int
 228 add_recp(struct queue *queue, const char *str, const char *sender, int expand)
 229 {
 230         struct qitem *it, *tit;
 231         struct stritem *sit;
 232         struct alias *al;
 233         struct passwd *pw;
 234         char *host;
 235         int aliased = 0;
 236
 237         it = calloc(1, sizeof(*it));
 238         if (it == NULL)
 239                 return (-1);
 240         it->addr = strdup(str);
 241         if (it->addr == NULL)
 242                 return (-1);
 243
 244         it->sender = sender;
 245         host = strrchr(it->addr, '@');
 246         if (host != NULL &&
 247             (strcmp(host + 1, hostname()) == 0 ||
 248              strcmp(host + 1, "localhost") == 0)) {
 249                 *host = 0;
 250         }
 251         LIST_FOREACH(tit, &queue->queue, next) {
 252                 /* weed out duplicate dests */
 253                 if (strcmp(tit->addr, it->addr) == 0) {
 254                         free(it->addr);
 255                         free(it);
 256                         return (0);
 257                 }
 258         }
 259         LIST_INSERT_HEAD(&queue->queue, it, next);
 260         if (strrchr(it->addr, '@') == NULL) {
 261                 it->remote = 0;
 262                 if (expand) {
 263                         LIST_FOREACH(al, &aliases, next) {
 264                                 if (strcmp(al->alias, it->addr) != 0)
 265                                         continue;
 266                                 SLIST_FOREACH(sit, &al->dests, next) {
 267                                         if (add_recp(queue, sit->str, sender, 1) != 0)
 268                                                 return (-1);
 269                                 }
 270                                 aliased = 1;
 271                         }
 272                         if (aliased) {
 273                                 LIST_REMOVE(it, next);
 274                         } else {
 275                                 /* Local destination, check */
 276                                 pw = getpwnam(it->addr);
 277                                 if (pw == NULL)
 278                                         goto out;
 279                                 /* XXX read .forward */
 280                                 endpwent();
 281                         }
 282                 }
 283         } else {
 284                 it->remote = 1;
 285         }
 286
 287         return (0);
 288
 289 out:
 290         free(it->addr);
 291         free(it);
 292         return (-1);
 293 }
 294
 295 static void
 296 deltmp(void)
 297 {
 298         struct stritem *t;
 299
 300         SLIST_FOREACH(t, &tmpfs, next) {
 301                 unlink(t->str);
 302         }
 303 }
 304
 305 int
 306 open_locked(const char *fname, int flags, ...)
 307 {
 308         int mode = 0;
 309
 310         if (flags & O_CREAT) {
 311                 va_list ap;
 312                 va_start(ap, flags);
 313                 mode = va_arg(ap, int);
 314                 va_end(ap);
 315         }
 316
 317 #ifndef O_EXLOCK
 318         int fd, save_errno;
 319
 320         fd = open(fname, flags, mode);
 321         if (fd < 0)
 322                 return(fd);
 323         if (flock(fd, LOCK_EX|((flags & O_NONBLOCK)? LOCK_NB: 0)) < 0) {
 324                 save_errno = errno;
 325                 close(fd);
 326                 errno = save_errno;
 327                 return(-1);
 328         }
 329         return(fd);
 330 #else
 331         return(open(fname, flags|O_EXLOCK, mode));
 332 #endif
 333 }
 334
 335 static char *
 336 rfc822date(void)
 337 {
 338         static char str[50];
 339         size_t error;
 340         time_t now;
 341
 342         now = time(NULL);
 343         error = strftime(str, sizeof(str), "%a, %d %b %Y %T %z",
 344                        localtime(&now));
 345         if (error == 0)
 346                 strcpy(str, "(date fail)");
 347         return (str);
 348 }
 349
 350 static int
 351 strprefixcmp(const char *str, const char *prefix)
 352 {
 353         return (strncasecmp(str, prefix, strlen(prefix)));
 354 }
 355
 356 static int
 357 readmail(struct queue *queue, const char *sender, int nodot)
 358 {
 359         char line[1000];        /* by RFC2822 */
 360         size_t linelen;
 361         size_t error;
 362         int had_headers = 0;
 363         int had_from = 0;
 364         int had_messagid = 0;
 365         int had_date = 0;
 366
 367         error = fprintf(queue->mailf,
 368                 "Received: from %s (uid %d)\n"
 369                 "\t(envelope-from %s)\n"
 370                 "\tid %s\n"
 371                 "\tby %s (%s)\n"
 372                 "\t%s\n",
 373                 username, getuid(),
 374                 sender,
 375                 queue->id,
 376                 hostname(), VERSION,
 377                 rfc822date());
 378         if ((ssize_t)error < 0)
 379                 return (-1);
 380
 381         while (!feof(stdin)) {
 382                 if (fgets(line, sizeof(line), stdin) == NULL)
 383                         break;
 384                 linelen = strlen(line);
 385                 if (linelen == 0 || line[linelen - 1] != '\n') {
 386                         errno = EINVAL;         /* XXX mark permanent errors */
 387                         return (-1);
 388                 }
 389                 if (!had_headers) {
 390                         if (strprefixcmp(line, "Date:") == 0)
 391                                 had_date = 1;
 392                         else if (strprefixcmp(line, "Message-Id:") == 0)
 393                                 had_messagid = 1;
 394                         else if (strprefixcmp(line, "From:") == 0)
 395                                 had_from = 1;
 396                 }
 397                 if (strcmp(line, "\n") == 0 && !had_headers) {
 398                         had_headers = 1;
 399                         while (!had_date || !had_messagid || !had_from) {
 400                                 if (!had_date) {
 401                                         had_date = 1;
 402                                         snprintf(line, sizeof(line), "Date: %s\n", rfc822date());
 403                                 } else if (!had_messagid) {
 404                                         /* XXX better msgid, assign earlier and log? */
 405                                         had_messagid = 1;
 406                                         snprintf(line, sizeof(line), "Message-Id: <%s@%s>\n",
 407                                                  queue->id, hostname());
 408                                 } else if (!had_from) {
 409                                         had_from = 1;
 410                                         snprintf(line, sizeof(line), "From: <%s>\n", sender);
 411                                 }
 412                                 if (fwrite(line, strlen(line), 1, queue->mailf) != 1)
 413                                         return (-1);
 414                         }
 415                         strcpy(line, "\n");
 416                 }
 417                 if (!nodot && linelen == 2 && line[0] == '.')
 418                         break;
 419                 if (fwrite(line, strlen(line), 1, queue->mailf) != 1)
 420                         return (-1);
 421         }
 422
 423         return (0);
 424 }
 425
 426 static struct qitem *
 427 go_background(struct queue *queue)
 428 {
 429         struct sigaction sa;
 430         struct qitem *it;
 431         pid_t pid;
 432
 433         if (daemonize && daemon(0, 0) != 0) {
 434                 syslog(LOG_ERR, "can not daemonize: %m");
 435                 exit(1);
 436         }
 437         daemonize = 0;
 438
 439         bzero(&sa, sizeof(sa));
 440         sa.sa_flags = SA_NOCLDWAIT;
 441         sa.sa_handler = SIG_IGN;
 442         sigaction(SIGCHLD, &sa, NULL);
 443
 444         LIST_FOREACH(it, &queue->queue, next) {
 445                 /* No need to fork for the last dest */
 446                 if (LIST_NEXT(it, next) == NULL)
 447                         goto retit;
 448
 449                 pid = fork();
 450                 switch (pid) {
 451                 case -1:
 452                         syslog(LOG_ERR, "can not fork: %m");
 453                         exit(1);
 454                         break;
 455
 456                 case 0:
 457                         /*
 458                          * Child:
 459                          *
 460                          * return and deliver mail
 461                          */
 462 retit:
 463                         /*
 464                          * If necessary, aquire the queue and * mail files.
 465                          * If this fails, we probably were raced by another
 466                          * process.
 467                          */
 468                         setlogident("%s", it->queueid);
 469                         if (aquirespool(it) < 0)
 470                                 exit(1);
 471                         dropspool(queue, it);
 472                         return (it);
 473
 474                 default:
 475                         /*
 476                          * Parent:
 477                          *
 478                          * fork next child
 479                          */
 480                         break;
 481                 }
 482         }
 483
 484         syslog(LOG_CRIT, "reached dead code");
 485         exit(1);
 486 }
 487
 488 static void
 489 bounce(struct qitem *it, const char *reason)
 490 {
 491         struct queue bounceq;
 492         struct qitem *bit;
 493         char line[1000];
 494         size_t pos;
 495         int error;
 496
 497         /* Don't bounce bounced mails */
 498         if (it->sender[0] == 0) {
 499                 syslog(LOG_INFO, "can not bounce a bounce message, discarding");
 500                 exit(1);
 501         }
 502
 503         LIST_INIT(&bounceq.queue);
 504         if (newspoolf(&bounceq, "") != 0)
 505                 goto fail;
 506
 507         syslog(LOG_ERR, "delivery failed, bouncing as %s", bounceq.id);
 508         setlogident("%s", bounceq.id);
 509
 510         error = fprintf(bounceq.mailf,
 511                 "Received: from MAILER-DAEMON\n"
 512                 "\tid %s\n"
 513                 "\tby %s (%s)\n"
 514                 "\t%s\n"
 515                 "X-Original-To: <%s>\n"
 516                 "From: MAILER-DAEMON <>\n"
 517                 "To: %s\n"
 518                 "Subject: Mail delivery failed\n"
 519                 "Message-Id: <%s@%s>\n"
 520                 "Date: %s\n"
 521                 "\n"
 522                 "This is the %s at %s.\n"
 523                 "\n"
 524                 "There was an error delivering your mail to <%s>.\n"
 525                 "\n"
 526                 "%s\n"
 527                 "\n"
 528                 "%s\n"
 529                 "\n",
 530                 bounceq.id,
 531                 hostname(), VERSION,
 532                 rfc822date(),
 533                 it->addr,
 534                 it->sender,
 535                 bounceq.id, hostname(),
 536                 rfc822date(),
 537                 VERSION, hostname(),
 538                 it->addr,
 539                 reason,
 540                 config->features & FULLBOUNCE ?
 541                     "Original message follows." :
 542                     "Message headers follow.");
 543         if (error < 0)
 544                 goto fail;
 545
 546         if (add_recp(&bounceq, it->sender, "", 1) != 0)
 547                 goto fail;
 548
 549         if (fseek(it->mailf, it->hdrlen, SEEK_SET) != 0)
 550                 goto fail;
 551         if (config->features & FULLBOUNCE) {
 552                 while ((pos = fread(line, 1, sizeof(line), it->mailf)) > 0) {
 553                         if (fwrite(line, 1, pos, bounceq.mailf) != pos)
 554                                 goto fail;
 555                 }
 556         } else {
 557                 while (!feof(it->mailf)) {
 558                         if (fgets(line, sizeof(line), it->mailf) == NULL)
 559                                 break;
 560                         if (line[0] == '\n')
 561                                 break;
 562                         if (fwrite(line, strlen(line), 1, bounceq.mailf) != 1)
 563                                 goto fail;
 564                 }
 565         }
 566
 567         if (linkspool(&bounceq, "MAILER-DAEMON") != 0)
 568                 goto fail;
 569         /* bounce is safe */
 570
 571         delqueue(it);
 572
 573         bit = go_background(&bounceq);
 574         deliver(bit);
 575         /* NOTREACHED */
 576
 577 fail:
 578         syslog(LOG_CRIT, "error creating bounce: %m");
 579         delqueue(it);
 580         exit(1);
 581 }
 582
 583 static void
 584 deliver(struct qitem *it)
 585 {
 586         int error;
 587         unsigned int backoff = MIN_RETRY;
 588         const char *errmsg = "unknown bounce reason";
 589         struct timeval now;
 590         struct stat st;
 591
 592 retry:
 593         syslog(LOG_INFO, "trying delivery");
 594
 595         if (it->remote)
 596                 error = deliver_remote(it, &errmsg);
 597         else
 598                 error = deliver_local(it, &errmsg);
 599
 600         switch (error) {
 601         case 0:
 602                 delqueue(it);
 603                 syslog(LOG_INFO, "delivery successful");
 604                 exit(0);
 605
 606         case 1:
 607                 if (stat(it->queuefn, &st) != 0) {
 608                         syslog(LOG_ERR, "lost queue file `%s'", it->queuefn);
 609                         exit(1);
 610                 }
 611                 if (gettimeofday(&now, NULL) == 0 &&
 612                     (now.tv_sec - st.st_mtimespec.tv_sec > MAX_TIMEOUT)) {
 613                         asprintf(__DECONST(void *, &errmsg),
 614                                  "Could not deliver for the last %d seconds. Giving up.",
 615                                  MAX_TIMEOUT);
 616                         goto bounce;
 617                 }
 618                 sleep(backoff);
 619                 backoff *= 2;
 620                 if (backoff > MAX_RETRY)
 621                         backoff = MAX_RETRY;
 622                 goto retry;
 623
 624         case -1:
 625         default:
 626                 break;
 627         }
 628
 629 bounce:
 630         bounce(it, errmsg);
 631         /* NOTREACHED */
 632 }
 633
 634 static void
 635 run_queue(struct queue *queue)
 636 {
 637         struct qitem *it;
 638
 639         if (LIST_EMPTY(&queue->queue))
 640                 return;
 641
 642         it = go_background(queue);
 643         deliver(it);
 644         /* NOTREACHED */
 645 }
 646
 647 static void
 648 show_queue(struct queue *queue)
 649 {
 650         struct qitem *it;
 651         int locked = 0; /* XXX */
 652
 653         if (LIST_EMPTY(&queue->queue)) {
 654                 printf("Mail queue is empty\n");
 655                 return;
 656         }
 657
 658         LIST_FOREACH(it, &queue->queue, next) {
 659                 printf("ID\t: %s%s\n"
 660                        "From\t: %s\n"
 661                        "To\t: %s\n"
 662                        "--\n",
 663                        it->queueid,
 664                        locked ? "*" : "",
 665                        it->sender, it->addr);
 666         }
 667 }
 668
 669 /*
 670  * TODO:
 671  *
 672  * - alias processing
 673  * - use group permissions
 674  * - proper sysexit codes
 675  */
 676
 677 int
 678 main(int argc, char **argv)
 679 {
 680         char *sender = NULL;
 681         struct qitem *it;
 682         struct queue queue;
 683         struct queue lqueue;
 684         int i, ch;
 685         int nodot = 0, doqueue = 0, showq = 0;
 686
 687         atexit(deltmp);
 688         LIST_INIT(&queue.queue);
 689
 690         if (strcmp(argv[0], "mailq") == 0) {
 691                 argv++; argc--;
 692                 showq = 1;
 693                 if (argc != 0)
 694                         errx(1, "invalid arguments");
 695                 goto skipopts;
 696         }
 697
 698         opterr = 0;
 699         while ((ch = getopt(argc, argv, "A:b:B:C:d:Df:F:h:iL:N:no:O:q:r:R:UV:vX:")) != -1) {
 700                 switch (ch) {
 701                 case 'A':
 702                         /* -AX is being ignored, except for -A{c,m} */
 703                         if (optarg[0] == 'c' || optarg[0] == 'm') {
 704                                 break;
 705                         }
 706                         /* else FALLTRHOUGH */
 707                 case 'b':
 708                         /* -bX is being ignored, except for -bp */
 709                         if (optarg[0] == 'p') {
 710                                 showq = 1;
 711                                 break;
 712                         }
 713                         /* else FALLTRHOUGH */
 714                 case 'D':
 715                         daemonize = 0;
 716                         break;
 717                 case 'L':
 718                         logident_base = optarg;
 719                         break;
 720                 case 'f':
 721                 case 'r':
 722                         sender = optarg;
 723                         break;
 724
 725                 case 'o':
 726                         /* -oX is being ignored, except for -oi */
 727                         if (optarg[0] != 'i')
 728                                 break;
 729                         /* else FALLTRHOUGH */
 730                 case 'O':
 731                         break;
 732                 case 'i':
 733                         nodot = 1;
 734                         break;
 735
 736                 case 'q':
 737                         doqueue = 1;
 738                         break;
 739
 740                 /* Ignored options */
 741                 case 'B':
 742                 case 'C':
 743                 case 'd':
 744                 case 'F':
 745                 case 'h':
 746                 case 'N':
 747                 case 'n':
 748                 case 'R':
 749                 case 'U':
 750                 case 'V':
 751                 case 'v':
 752                 case 'X':
 753                         break;
 754
 755                 default:
 756                         exit(1);
 757                 }
 758         }
 759         argc -= optind;
 760         argv += optind;
 761         opterr = 1;
 762
 763         if (argc != 0 && (showq || doqueue))
 764                 errx(1, "sending mail and queue operations are mutually exclusive");
 765
 766         if (showq + doqueue > 1)
 767                 errx(1, "conflicting queue operations");
 768
 769 skipopts:
 770         if (logident_base == NULL)
 771                 logident_base = "dma";
 772         setlogident(NULL);
 773         set_username();
 774
 775         /* XXX fork root here */
 776
 777         config = calloc(1, sizeof(*config));
 778         if (config == NULL)
 779                 err(1, NULL);
 780
 781         if (parse_conf(CONF_PATH) < 0) {
 782                 free(config);
 783                 err(1, "can not read config file");
 784         }
 785
 786         if (config->features & VIRTUAL)
 787                 if (parse_virtuser(config->virtualpath) < 0)
 788                         err(1, "can not read virtual user file `%s'",
 789                                 config->virtualpath);
 790
 791         if (parse_authfile(config->authpath) < 0)
 792                 err(1, "can not read SMTP authentication file");
 793
 794         if (showq) {
 795                 load_queue(&lqueue);
 796                 show_queue(&lqueue);
 797                 return (0);
 798         }
 799
 800         if (doqueue) {
 801                 load_queue(&lqueue);
 802                 run_queue(&lqueue);
 803                 return (0);
 804         }
 805
 806         if (read_aliases() != 0)
 807                 err(1, "can not read aliases file `%s'", config->aliases);
 808
 809         if ((sender = set_from(sender)) == NULL)
 810                 err(1, NULL);
 811
 812         for (i = 0; i < argc; i++) {
 813                 if (add_recp(&queue, argv[i], sender, 1) != 0)
 814                         errx(1, "invalid recipient `%s'", argv[i]);
 815         }
 816
 817         if (LIST_EMPTY(&queue.queue))
 818                 errx(1, "no recipients");
 819
 820         if (newspoolf(&queue, sender) != 0)
 821                 err(1, "can not create temp file");
 822
 823         setlogident("%s", queue.id);
 824
 825         if (readmail(&queue, sender, nodot) != 0)
 826                 err(1, "can not read mail");
 827
 828         if (linkspool(&queue, sender) != 0)
 829                 err(1, "can not create spools");
 830
 831         /* From here on the mail is safe. */
 832
 833         if (config->features & DEFER)
 834                 return (0);
 835
 836         it = go_background(&queue);
 837         deliver(it);
 838
 839         /* NOTREACHED */
 840         return (0);
 841 }