usr.bin/mail/collect.c

   1 /*
   2  * Copyright (c) 1980, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 #if 0
  36 static char sccsid[] = "@(#)collect.c   8.2 (Berkeley) 4/19/94";
  37 #endif
  38 #endif /* not lint */
  39 #include <sys/cdefs.h>
  40 __FBSDID("$FreeBSD: src/usr.bin/mail/collect.c,v 1.4.6.3 2003/01/06 05:46:03 mikeh Exp $");
  41
  42 /*
  43  * Mail -- a mail program
  44  *
  45  * Collect input from standard input, handling
  46  * ~ escapes.
  47  */
  48
  49 #include "rcv.h"
  50 #include <fcntl.h>
  51 #include "extern.h"
  52
  53 /*
  54  * Read a message from standard output and return a read file to it
  55  * or NULL on error.
  56  */
  57
  58 /*
  59  * The following hokiness with global variables is so that on
  60  * receipt of an interrupt signal, the partial message can be salted
  61  * away on dead.letter.
  62  */
  63
  64 static  sig_t   saveint;                /* Previous SIGINT value */
  65 static  sig_t   savehup;                /* Previous SIGHUP value */
  66 static  sig_t   savetstp;               /* Previous SIGTSTP value */
  67 static  sig_t   savettou;               /* Previous SIGTTOU value */
  68 static  sig_t   savettin;               /* Previous SIGTTIN value */
  69 static  FILE    *collf;                 /* File for saving away */
  70 static  int     hadintr;                /* Have seen one SIGINT so far */
  71
  72 static  jmp_buf colljmp;                /* To get back to work */
  73 static  int     colljmp_p;              /* whether to long jump */
  74 static  jmp_buf collabort;              /* To end collection with error */
  75
  76 FILE *
  77 collect(hp, printheaders)
  78         struct header *hp;
  79         int printheaders;
  80 {
  81         FILE *fbuf;
  82         int lc, cc, escape, eofcount, fd, c, t;
  83         char linebuf[LINESIZE], tempname[PATHSIZE], *cp, getsub;
  84         sigset_t nset;
  85         int longline, lastlong, rc;     /* So we don't make 2 or more lines
  86                                            out of a long input line. */
  87
  88         collf = NULL;
  89         /*
  90          * Start catching signals from here, but we're still die on interrupts
  91          * until we're in the main loop.
  92          */
  93         (void)sigemptyset(&nset);
  94         (void)sigaddset(&nset, SIGINT);
  95         (void)sigaddset(&nset, SIGHUP);
  96         (void)sigprocmask(SIG_BLOCK, &nset, NULL);
  97         if ((saveint = signal(SIGINT, SIG_IGN)) != SIG_IGN)
  98                 (void)signal(SIGINT, collint);
  99         if ((savehup = signal(SIGHUP, SIG_IGN)) != SIG_IGN)
 100                 (void)signal(SIGHUP, collhup);
 101         savetstp = signal(SIGTSTP, collstop);
 102         savettou = signal(SIGTTOU, collstop);
 103         savettin = signal(SIGTTIN, collstop);
 104         if (setjmp(collabort) || setjmp(colljmp)) {
 105                 (void)rm(tempname);
 106                 goto err;
 107         }
 108         (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
 109
 110         noreset++;
 111         (void)snprintf(tempname, sizeof(tempname),
 112             "%s/mail.RsXXXXXXXXXX", tmpdir);
 113         if ((fd = mkstemp(tempname)) == -1 ||
 114             (collf = Fdopen(fd, "w+")) == NULL) {
 115                 warn("%s", tempname);
 116                 goto err;
 117         }
 118         (void)rm(tempname);
 119
 120         /*
 121          * If we are going to prompt for a subject,
 122          * refrain from printing a newline after
 123          * the headers (since some people mind).
 124          */
 125         t = GTO|GSUBJECT|GCC|GNL;
 126         getsub = 0;
 127         if (hp->h_subject == NULL && value("interactive") != NULL &&
 128             (value("ask") != NULL || value("asksub") != NULL))
 129                 t &= ~GNL, getsub++;
 130         if (printheaders) {
 131                 puthead(hp, stdout, t);
 132                 (void)fflush(stdout);
 133         }
 134         if ((cp = value("escape")) != NULL)
 135                 escape = *cp;
 136         else
 137                 escape = ESCAPE;
 138         eofcount = 0;
 139         hadintr = 0;
 140         lastlong = 0;
 141         longline = 0;
 142
 143         if (!setjmp(colljmp)) {
 144                 if (getsub)
 145                         grabh(hp, GSUBJECT);
 146         } else {
 147                 /*
 148                  * Come here for printing the after-signal message.
 149                  * Duplicate messages won't be printed because
 150                  * the write is aborted if we get a SIGTTOU.
 151                  */
 152 cont:
 153                 if (hadintr) {
 154                         (void)fflush(stdout);
 155                         fprintf(stderr,
 156                         "\n(Interrupt -- one more to kill letter)\n");
 157                 } else {
 158                         printf("(continue)\n");
 159                         (void)fflush(stdout);
 160                 }
 161         }
 162         for (;;) {
 163                 colljmp_p = 1;
 164                 c = readline(stdin, linebuf, LINESIZE);
 165                 colljmp_p = 0;
 166                 if (c < 0) {
 167                         if (value("interactive") != NULL &&
 168                             value("ignoreeof") != NULL && ++eofcount < 25) {
 169                                 printf("Use \".\" to terminate letter\n");
 170                                 continue;
 171                         }
 172                         break;
 173                 }
 174                 lastlong = longline;
 175                 longline = c == LINESIZE - 1;
 176                 eofcount = 0;
 177                 hadintr = 0;
 178                 if (linebuf[0] == '.' && linebuf[1] == '\0' &&
 179                     value("interactive") != NULL && !lastlong &&
 180                     (value("dot") != NULL || value("ignoreeof") != NULL))
 181                         break;
 182                 if (linebuf[0] != escape || value("interactive") == NULL ||
 183                     lastlong) {
 184                         if (putline(collf, linebuf, !longline) < 0)
 185                                 goto err;
 186                         continue;
 187                 }
 188                 c = linebuf[1];
 189                 switch (c) {
 190                 default:
 191                         /*
 192                          * On double escape, just send the single one.
 193                          * Otherwise, it's an error.
 194                          */
 195                         if (c == escape) {
 196                                 if (putline(collf, &linebuf[1], !longline) < 0)
 197                                         goto err;
 198                                 else
 199                                         break;
 200                         }
 201                         printf("Unknown tilde escape.\n");
 202                         break;
 203                 case 'C':
 204                         /*
 205                          * Dump core.
 206                          */
 207                         core();
 208                         break;
 209                 case '!':
 210                         /*
 211                          * Shell escape, send the balance of the
 212                          * line to sh -c.
 213                          */
 214                         shell(&linebuf[2]);
 215                         break;
 216                 case ':':
 217                 case '_':
 218                         /*
 219                          * Escape to command mode, but be nice!
 220                          */
 221                         execute(&linebuf[2], 1);
 222                         goto cont;
 223                 case '.':
 224                         /*
 225                          * Simulate end of file on input.
 226                          */
 227                         goto out;
 228                 case 'q':
 229                         /*
 230                          * Force a quit of sending mail.
 231                          * Act like an interrupt happened.
 232                          */
 233                         hadintr++;
 234                         collint(SIGINT);
 235                         exit(1);
 236                 case 'x':
 237                         /*
 238                          * Exit, do not save in dead.letter.
 239                          */
 240                         goto err;
 241                 case 'h':
 242                         /*
 243                          * Grab a bunch of headers.
 244                          */
 245                         grabh(hp, GTO|GSUBJECT|GCC|GBCC);
 246                         goto cont;
 247                 case 't':
 248                         /*
 249                          * Add to the To list.
 250                          */
 251                         hp->h_to = cat(hp->h_to, extract(&linebuf[2], GTO));
 252                         break;
 253                 case 's':
 254                         /*
 255                          * Set the Subject line.
 256                          */
 257                         cp = &linebuf[2];
 258                         while (isspace((unsigned char)*cp))
 259                                 cp++;
 260                         hp->h_subject = savestr(cp);
 261                         break;
 262                 case 'R':
 263                         /*
 264                          * Set the Reply-To line.
 265                          */
 266                         cp = &linebuf[2];
 267                         while (isspace((unsigned char)*cp))
 268                                 cp++;
 269                         hp->h_replyto = savestr(cp);
 270                         break;
 271                 case 'c':
 272                         /*
 273                          * Add to the CC list.
 274                          */
 275                         hp->h_cc = cat(hp->h_cc, extract(&linebuf[2], GCC));
 276                         break;
 277                 case 'b':
 278                         /*
 279                          * Add to the BCC list.
 280                          */
 281                         hp->h_bcc = cat(hp->h_bcc, extract(&linebuf[2], GBCC));
 282                         break;
 283                 case 'i':
 284                 case 'A':
 285                 case 'a':
 286                         /*
 287                          * Insert named variable in message.
 288                          */
 289                         switch(c) {
 290                                 case 'i':
 291                                         cp = &linebuf[2];
 292                                         while(isspace((unsigned char)*cp))
 293                                                 cp++;
 294                                         break;
 295                                 case 'a':
 296                                         cp = "sign";
 297                                         break;
 298                                 case 'A':
 299                                         cp = "Sign";
 300                                         break;
 301                                 default:
 302                                         goto err;
 303                         }
 304
 305                         if(*cp != '\0' && (cp = value(cp)) != NULL) {
 306                                 printf("%s\n", cp);
 307                                 if(putline(collf, cp, 1) < 0)
 308                                         goto err;
 309                         }
 310
 311                         break;
 312                 case 'd':
 313                         /*
 314                          * Read in the dead letter file.
 315                          */
 316                         if (strlcpy(linebuf + 2, getdeadletter(),
 317                                 sizeof(linebuf) - 2)
 318                             >= sizeof(linebuf) - 2) {
 319                                 printf("Line buffer overflow\n");
 320                                 break;
 321                         }
 322                         /* FALLTHROUGH */
 323                 case 'r':
 324                 case '<':
 325                         /*
 326                          * Invoke a file:
 327                          * Search for the file name,
 328                          * then open it and copy the contents to collf.
 329                          */
 330                         cp = &linebuf[2];
 331                         while (isspace((unsigned char)*cp))
 332                                 cp++;
 333                         if (*cp == '\0') {
 334                                 printf("Interpolate what file?\n");
 335                                 break;
 336                         }
 337                         cp = expand(cp);
 338                         if (cp == NULL)
 339                                 break;
 340                         if (*cp == '!') {
 341                                 /*
 342                                  * Insert stdout of command.
 343                                  */
 344                                 char *sh;
 345                                 int nullfd, tempfd, rc;
 346                                 char tempname2[PATHSIZE];
 347
 348                                 if ((nullfd = open("/dev/null", O_RDONLY, 0))
 349                                     == -1) {
 350                                         warn("/dev/null");
 351                                         break;
 352                                 }
 353
 354                                 (void)snprintf(tempname2, sizeof(tempname2),
 355                                     "%s/mail.ReXXXXXXXXXX", tmpdir);
 356                                 if ((tempfd = mkstemp(tempname2)) == -1 ||
 357                                     (fbuf = Fdopen(tempfd, "w+")) == NULL) {
 358                                         warn("%s", tempname2);
 359                                         break;
 360                                 }
 361                                 (void)unlink(tempname2);
 362
 363                                 if ((sh = value("SHELL")) == NULL)
 364                                         sh = _PATH_CSHELL;
 365
 366                                 rc = run_command(sh, 0, nullfd, fileno(fbuf),
 367                                     "-c", cp+1, NULL);
 368
 369                                 close(nullfd);
 370
 371                                 if (rc < 0) {
 372                                         (void)Fclose(fbuf);
 373                                         break;
 374                                 }
 375
 376                                 if (fsize(fbuf) == 0) {
 377                                         fprintf(stderr,
 378                                             "No bytes from command \"%s\"\n",
 379                                             cp+1);
 380                                         (void)Fclose(fbuf);
 381                                         break;
 382                                 }
 383
 384                                 rewind(fbuf);
 385                         } else if (isdir(cp)) {
 386                                 printf("%s: Directory\n", cp);
 387                                 break;
 388                         } else if ((fbuf = Fopen(cp, "r")) == NULL) {
 389                                 warn("%s", cp);
 390                                 break;
 391                         }
 392                         printf("\"%s\" ", cp);
 393                         (void)fflush(stdout);
 394                         lc = 0;
 395                         cc = 0;
 396                         while ((rc = readline(fbuf, linebuf, LINESIZE)) >= 0) {
 397                                 if (rc != LINESIZE - 1)
 398                                         lc++;
 399                                 if ((t = putline(collf, linebuf,
 400                                          rc != LINESIZE - 1)) < 0) {
 401                                         (void)Fclose(fbuf);
 402                                         goto err;
 403                                 }
 404                                 cc += t;
 405                         }
 406                         (void)Fclose(fbuf);
 407                         printf("%d/%d\n", lc, cc);
 408                         break;
 409                 case 'w':
 410                         /*
 411                          * Write the message on a file.
 412                          */
 413                         cp = &linebuf[2];
 414                         while (*cp == ' ' || *cp == '\t')
 415                                 cp++;
 416                         if (*cp == '\0') {
 417                                 fprintf(stderr, "Write what file!?\n");
 418                                 break;
 419                         }
 420                         if ((cp = expand(cp)) == NULL)
 421                                 break;
 422                         rewind(collf);
 423                         exwrite(cp, collf, 1);
 424                         break;
 425                 case 'm':
 426                 case 'M':
 427                 case 'f':
 428                 case 'F':
 429                         /*
 430                          * Interpolate the named messages, if we
 431                          * are in receiving mail mode.  Does the
 432                          * standard list processing garbage.
 433                          * If ~f is given, we don't shift over.
 434                          */
 435                         if (forward(linebuf + 2, collf, tempname, c) < 0)
 436                                 goto err;
 437                         goto cont;
 438                 case '?':
 439                         if ((fbuf = Fopen(_PATH_TILDE, "r")) == NULL) {
 440                                 warn("%s", _PATH_TILDE);
 441                                 break;
 442                         }
 443                         while ((t = getc(fbuf)) != EOF)
 444                                 (void)putchar(t);
 445                         (void)Fclose(fbuf);
 446                         break;
 447                 case 'p':
 448                         /*
 449                          * Print out the current state of the
 450                          * message without altering anything.
 451                          */
 452                         rewind(collf);
 453                         printf("-------\nMessage contains:\n");
 454                         puthead(hp, stdout, GTO|GSUBJECT|GCC|GBCC|GNL);
 455                         while ((t = getc(collf)) != EOF)
 456                                 (void)putchar(t);
 457                         goto cont;
 458                 case '|':
 459                         /*
 460                          * Pipe message through command.
 461                          * Collect output as new message.
 462                          */
 463                         rewind(collf);
 464                         mespipe(collf, &linebuf[2]);
 465                         goto cont;
 466                 case 'v':
 467                 case 'e':
 468                         /*
 469                          * Edit the current message.
 470                          * 'e' means to use EDITOR
 471                          * 'v' means to use VISUAL
 472                          */
 473                         rewind(collf);
 474                         mesedit(collf, c);
 475                         goto cont;
 476                 }
 477         }
 478         goto out;
 479 err:
 480         if (collf != NULL) {
 481                 (void)Fclose(collf);
 482                 collf = NULL;
 483         }
 484 out:
 485         if (collf != NULL)
 486                 rewind(collf);
 487         noreset--;
 488         (void)sigprocmask(SIG_BLOCK, &nset, NULL);
 489         (void)signal(SIGINT, saveint);
 490         (void)signal(SIGHUP, savehup);
 491         (void)signal(SIGTSTP, savetstp);
 492         (void)signal(SIGTTOU, savettou);
 493         (void)signal(SIGTTIN, savettin);
 494         (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
 495         return (collf);
 496 }
 497
 498 /*
 499  * Write a file, ex-like if f set.
 500  */
 501 int
 502 exwrite(name, fp, f)
 503         char name[];
 504         FILE *fp;
 505         int f;
 506 {
 507         FILE *of;
 508         int c, lc;
 509         long cc;
 510         struct stat junk;
 511
 512         if (f) {
 513                 printf("\"%s\" ", name);
 514                 (void)fflush(stdout);
 515         }
 516         if (stat(name, &junk) >= 0 && S_ISREG(junk.st_mode)) {
 517                 if (!f)
 518                         fprintf(stderr, "%s: ", name);
 519                 fprintf(stderr, "File exists\n");
 520                 return (-1);
 521         }
 522         if ((of = Fopen(name, "w")) == NULL) {
 523                 warn((char *)NULL);
 524                 return (-1);
 525         }
 526         lc = 0;
 527         cc = 0;
 528         while ((c = getc(fp)) != EOF) {
 529                 cc++;
 530                 if (c == '\n')
 531                         lc++;
 532                 (void)putc(c, of);
 533                 if (ferror(of)) {
 534                         warnx("%s", name);
 535                         (void)Fclose(of);
 536                         return (-1);
 537                 }
 538         }
 539         (void)Fclose(of);
 540         printf("%d/%ld\n", lc, cc);
 541         (void)fflush(stdout);
 542         return (0);
 543 }
 544
 545 /*
 546  * Edit the message being collected on fp.
 547  * On return, make the edit file the new temp file.
 548  */
 549 void
 550 mesedit(fp, c)
 551         FILE *fp;
 552         int c;
 553 {
 554         sig_t sigint = signal(SIGINT, SIG_IGN);
 555         FILE *nf = run_editor(fp, (off_t)-1, c, 0);
 556
 557         if (nf != NULL) {
 558                 (void)fseeko(nf, (off_t)0, SEEK_END);
 559                 collf = nf;
 560                 (void)Fclose(fp);
 561         }
 562         (void)signal(SIGINT, sigint);
 563 }
 564
 565 /*
 566  * Pipe the message through the command.
 567  * Old message is on stdin of command;
 568  * New message collected from stdout.
 569  * Sh -c must return 0 to accept the new message.
 570  */
 571 void
 572 mespipe(fp, cmd)
 573         FILE *fp;
 574         char cmd[];
 575 {
 576         FILE *nf;
 577         int fd;
 578         sig_t sigint = signal(SIGINT, SIG_IGN);
 579         char *sh, tempname[PATHSIZE];
 580
 581         (void)snprintf(tempname, sizeof(tempname),
 582             "%s/mail.ReXXXXXXXXXX", tmpdir);
 583         if ((fd = mkstemp(tempname)) == -1 ||
 584             (nf = Fdopen(fd, "w+")) == NULL) {
 585                 warn("%s", tempname);
 586                 goto out;
 587         }
 588         (void)rm(tempname);
 589         /*
 590          * stdin = current message.
 591          * stdout = new message.
 592          */
 593         if ((sh = value("SHELL")) == NULL)
 594                 sh = _PATH_CSHELL;
 595         if (run_command(sh,
 596             0, fileno(fp), fileno(nf), "-c", cmd, NULL) < 0) {
 597                 (void)Fclose(nf);
 598                 goto out;
 599         }
 600         if (fsize(nf) == 0) {
 601                 fprintf(stderr, "No bytes from \"%s\" !?\n", cmd);
 602                 (void)Fclose(nf);
 603                 goto out;
 604         }
 605         /*
 606          * Take new files.
 607          */
 608         (void)fseeko(nf, (off_t)0, SEEK_END);
 609         collf = nf;
 610         (void)Fclose(fp);
 611 out:
 612         (void)signal(SIGINT, sigint);
 613 }
 614
 615 /*
 616  * Interpolate the named messages into the current
 617  * message, preceding each line with a tab.
 618  * Return a count of the number of characters now in
 619  * the message, or -1 if an error is encountered writing
 620  * the message temporary.  The flag argument is 'm' if we
 621  * should shift over and 'f' if not.
 622  */
 623 int
 624 forward(ms, fp, fn, f)
 625         char ms[];
 626         FILE *fp;
 627         char *fn;
 628         int f;
 629 {
 630         int *msgvec;
 631         struct ignoretab *ig;
 632         char *tabst;
 633
 634         msgvec = (int *)salloc((msgCount+1) * sizeof(*msgvec));
 635         if (msgvec == NULL)
 636                 return (0);
 637         if (getmsglist(ms, msgvec, 0) < 0)
 638                 return (0);
 639         if (*msgvec == 0) {
 640                 *msgvec = first(0, MMNORM);
 641                 if (*msgvec == 0) {
 642                         printf("No appropriate messages\n");
 643                         return (0);
 644                 }
 645                 msgvec[1] = 0;
 646         }
 647         if (f == 'f' || f == 'F')
 648                 tabst = NULL;
 649         else if ((tabst = value("indentprefix")) == NULL)
 650                 tabst = "\t";
 651         ig = isupper((unsigned char)f) ? NULL : ignore;
 652         printf("Interpolating:");
 653         for (; *msgvec != 0; msgvec++) {
 654                 struct message *mp = message + *msgvec - 1;
 655
 656                 touch(mp);
 657                 printf(" %d", *msgvec);
 658                 if (sendmessage(mp, fp, ig, tabst) < 0) {
 659                         warnx("%s", fn);
 660                         return (-1);
 661                 }
 662         }
 663         printf("\n");
 664         return (0);
 665 }
 666
 667 /*
 668  * Print (continue) when continued after ^Z.
 669  */
 670 /*ARGSUSED*/
 671 void
 672 collstop(s)
 673         int s;
 674 {
 675         sig_t old_action = signal(s, SIG_DFL);
 676         sigset_t nset;
 677
 678         (void)sigemptyset(&nset);
 679         (void)sigaddset(&nset, s);
 680         (void)sigprocmask(SIG_UNBLOCK, &nset, NULL);
 681         (void)kill(0, s);
 682         (void)sigprocmask(SIG_BLOCK, &nset, NULL);
 683         (void)signal(s, old_action);
 684         if (colljmp_p) {
 685                 colljmp_p = 0;
 686                 hadintr = 0;
 687                 longjmp(colljmp, 1);
 688         }
 689 }
 690
 691 /*
 692  * On interrupt, come here to save the partial message in ~/dead.letter.
 693  * Then jump out of the collection loop.
 694  */
 695 /*ARGSUSED*/
 696 void
 697 collint(s)
 698         int s;
 699 {
 700         /*
 701          * the control flow is subtle, because we can be called from ~q.
 702          */
 703         if (!hadintr) {
 704                 if (value("ignore") != NULL) {
 705                         printf("@");
 706                         (void)fflush(stdout);
 707                         clearerr(stdin);
 708                         return;
 709                 }
 710                 hadintr = 1;
 711                 longjmp(colljmp, 1);
 712         }
 713         rewind(collf);
 714         if (value("nosave") == NULL)
 715                 savedeadletter(collf);
 716         longjmp(collabort, 1);
 717 }
 718
 719 /*ARGSUSED*/
 720 void
 721 collhup(s)
 722         int s;
 723 {
 724         rewind(collf);
 725         savedeadletter(collf);
 726         /*
 727          * Let's pretend nobody else wants to clean up,
 728          * a true statement at this time.
 729          */
 730         exit(1);
 731 }
 732
 733 void
 734 savedeadletter(fp)
 735         FILE *fp;
 736 {
 737         FILE *dbuf;
 738         int c;
 739         char *cp;
 740
 741         if (fsize(fp) == 0)
 742                 return;
 743         cp = getdeadletter();
 744         c = umask(077);
 745         dbuf = Fopen(cp, "a");
 746         (void)umask(c);
 747         if (dbuf == NULL)
 748                 return;
 749         while ((c = getc(fp)) != EOF)
 750                 (void)putc(c, dbuf);
 751         (void)Fclose(dbuf);
 752         rewind(fp);
 753 }