usr.bin/mail/collect.c

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