mail_cmds/mail/send.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[] = "@(#)send.c      8.1 (Berkeley) 6/6/93";
  37 #endif
  38 static const char rcsid[] =
  39   "$FreeBSD: src/usr.bin/mail/send.c,v 1.14 2004/02/29 20:44:44 mikeh Exp $";
  40 #endif /* not lint */
  41
  42 #include <sys/cdefs.h>
  43
  44 #include "rcv.h"
  45 #include "extern.h"
  46
  47 /*
  48  * Mail -- a mail program
  49  *
  50  * Mail to others.
  51  */
  52
  53 /*
  54  * Send message described by the passed pointer to the
  55  * passed output buffer.  Return -1 on error.
  56  * Adjust the status: field if need be.
  57  * If doign is given, suppress ignored header fields.
  58  * prefix is a string to prepend to each output line.
  59  */
  60 int
  61 sendmessage(mp, obuf, doign, prefix)
  62         struct message *mp;
  63         FILE *obuf;
  64         struct ignoretab *doign;
  65         char *prefix;
  66 {
  67         long count;
  68         FILE *ibuf;
  69         char *cp, *cp2, line[LINESIZE];
  70         int ishead, infld, ignoring = 0, dostat, firstline;
  71         int c = 0, length, prefixlen = 0;
  72
  73         /*
  74          * Compute the prefix string, without trailing whitespace
  75          */
  76         if (prefix != NULL) {
  77                 cp2 = 0;
  78                 for (cp = prefix; *cp != '\0'; cp++)
  79                         if (*cp != ' ' && *cp != '\t')
  80                                 cp2 = cp;
  81                 prefixlen = cp2 == NULL ? 0 : cp2 - prefix + 1;
  82         }
  83         ibuf = setinput(mp);
  84         count = mp->m_size;
  85         ishead = 1;
  86         dostat = doign == 0 || !isign("status", doign);
  87         infld = 0;
  88         firstline = 1;
  89         /*
  90          * Process headers first
  91          */
  92         while (count > 0 && ishead) {
  93                 if (fgets(line, sizeof(line), ibuf) == NULL)
  94                         break;
  95                 count -= length = strlen(line);
  96                 if (firstline) {
  97                         /*
  98                          * First line is the From line, so no headers
  99                          * there to worry about
 100                          */
 101                         firstline = 0;
 102                         ignoring = doign == ignoreall;
 103                 } else if (line[0] == '\n') {
 104                         /*
 105                          * If line is blank, we've reached end of
 106                          * headers, so force out status: field
 107                          * and note that we are no longer in header
 108                          * fields
 109                          */
 110                         if (dostat) {
 111                                 statusput(mp, obuf, prefix);
 112                                 dostat = 0;
 113                         }
 114                         ishead = 0;
 115                         ignoring = doign == ignoreall;
 116                 } else if (infld && (line[0] == ' ' || line[0] == '\t')) {
 117                         /*
 118                          * If this line is a continuation (via space or tab)
 119                          * of a previous header field, just echo it
 120                          * (unless the field should be ignored).
 121                          * In other words, nothing to do.
 122                          */
 123                 } else {
 124                         /*
 125                          * Pick up the header field if we have one.
 126                          */
 127                         for (cp = line; (c = *cp++) != '\0' && c != ':' &&
 128                             !isspace((unsigned char)c);)
 129                                 ;
 130                         cp2 = --cp;
 131                         while (isspace((unsigned char)*cp++))
 132                                 ;
 133                         if (cp[-1] != ':') {
 134                                 /*
 135                                  * Not a header line, force out status:
 136                                  * This happens in uucp style mail where
 137                                  * there are no headers at all.
 138                                  */
 139                                 if (dostat) {
 140                                         statusput(mp, obuf, prefix);
 141                                         dostat = 0;
 142                                 }
 143                                 if (doign != ignoreall)
 144                                         /* add blank line */
 145                                         (void)putc('\n', obuf);
 146                                 ishead = 0;
 147                                 ignoring = 0;
 148                         } else {
 149                                 /*
 150                                  * If it is an ignored field and
 151                                  * we care about such things, skip it.
 152                                  */
 153                                 *cp2 = '\0';    /* temporarily null terminate */
 154                                 if (doign && isign(line, doign))
 155                                         ignoring = 1;
 156                                 else if ((line[0] == 's' || line[0] == 'S') &&
 157                                          strcasecmp(line, "status") == 0) {
 158                                         /*
 159                                          * If the field is "status," go compute
 160                                          * and print the real Status: field
 161                                          */
 162                                         if (dostat) {
 163                                                 statusput(mp, obuf, prefix);
 164                                                 dostat = 0;
 165                                         }
 166                                         ignoring = 1;
 167                                 } else {
 168                                         ignoring = 0;
 169                                         *cp2 = c;       /* restore */
 170                                 }
 171                                 infld = 1;
 172                         }
 173                 }
 174                 if (!ignoring) {
 175                         /*
 176                          * Strip trailing whitespace from prefix
 177                          * if line is blank.
 178                          */
 179                         if (prefix != NULL) {
 180                                 if (length > 1)
 181                                         fputs(prefix, obuf);
 182                                 else
 183                                         (void)fwrite(prefix, sizeof(*prefix),
 184                                             prefixlen, obuf);
 185                         }
 186                         (void)fwrite(line, sizeof(*line), length, obuf);
 187                         if (ferror(obuf))
 188                                 return (-1);
 189                 }
 190         }
 191         /*
 192          * Copy out message body
 193          */
 194         if (doign == ignoreall)
 195                 count--;                /* skip final blank line */
 196         if (prefix != NULL)
 197                 while (count > 0) {
 198                         if (fgets(line, sizeof(line), ibuf) == NULL) {
 199                                 c = 0;
 200                                 break;
 201                         }
 202                         count -= c = strlen(line);
 203                         /*
 204                          * Strip trailing whitespace from prefix
 205                          * if line is blank.
 206                          */
 207                         if (c > 1)
 208                                 fputs(prefix, obuf);
 209                         else
 210                                 (void)fwrite(prefix, sizeof(*prefix),
 211                                     prefixlen, obuf);
 212                         (void)fwrite(line, sizeof(*line), c, obuf);
 213                         if (ferror(obuf))
 214                                 return (-1);
 215                 }
 216         else
 217                 while (count > 0) {
 218                         c = count < LINESIZE ? count : LINESIZE;
 219                         if ((c = fread(line, sizeof(*line), c, ibuf)) <= 0)
 220                                 break;
 221                         count -= c;
 222                         if (fwrite(line, sizeof(*line), c, obuf) != c)
 223                                 return (-1);
 224                 }
 225         if (doign == ignoreall && c > 0 && line[c - 1] != '\n')
 226                 /* no final blank line */
 227                 if ((c = getc(ibuf)) != EOF && putc(c, obuf) == EOF)
 228                         return (-1);
 229         return (0);
 230 }
 231
 232 /*
 233  * Output a reasonable looking status field.
 234  */
 235 void
 236 statusput(mp, obuf, prefix)
 237         struct message *mp;
 238         FILE *obuf;
 239         char *prefix;
 240 {
 241         char statout[3];
 242         char *cp = statout;
 243
 244         if (mp->m_flag & MREAD)
 245                 *cp++ = 'R';
 246         if ((mp->m_flag & MNEW) == 0)
 247                 *cp++ = 'O';
 248         *cp = '\0';
 249         if (statout[0] != '\0')
 250                 fprintf(obuf, "%sStatus: %s\n",
 251                         prefix == NULL ? "" : prefix, statout);
 252 }
 253
 254 /*
 255  * Interface between the argument list and the mail1 routine
 256  * which does all the dirty work.
 257  */
 258 int
 259 mail(to, cc, bcc, smopts, subject, replyto)
 260         struct name *to, *cc, *bcc, *smopts;
 261         char *subject, *replyto;
 262 {
 263         struct header head;
 264
 265         head.h_to = to;
 266         head.h_subject = subject;
 267         head.h_cc = cc;
 268         head.h_bcc = bcc;
 269         head.h_smopts = smopts;
 270         head.h_replyto = replyto;
 271         head.h_inreplyto = NULL;
 272         mail1(&head, 0);
 273         return (0);
 274 }
 275
 276
 277 /*
 278  * Send mail to a bunch of user names.  The interface is through
 279  * the mail routine below.
 280  */
 281 int
 282 sendmail(str)
 283         char *str;
 284 {
 285         struct header head;
 286
 287         head.h_to = extract(str, GTO);
 288         head.h_subject = NULL;
 289         head.h_cc = NULL;
 290         head.h_bcc = NULL;
 291         head.h_smopts = NULL;
 292         head.h_replyto = value("REPLYTO");
 293         head.h_inreplyto = NULL;
 294         mail1(&head, 0);
 295         return (0);
 296 }
 297
 298 /*
 299  * Mail a message on standard input to the people indicated
 300  * in the passed header.  (Internal interface).
 301  */
 302 void
 303 mail1(hp, printheaders)
 304         struct header *hp;
 305         int printheaders;
 306 {
 307         char *cp;
 308         char *nbuf;
 309         int pid;
 310         char **namelist;
 311         struct name *to, *nsto = NULL;
 312         FILE *mtf;
 313
 314         /*
 315          * Collect user's mail from standard input.
 316          * Get the result as mtf.
 317          */
 318         if ((mtf = collect(hp, printheaders)) == NULL)
 319                 return;
 320         if (value("interactive") != NULL) {
 321                 if (value("askcc") != NULL || value("askbcc") != NULL) {
 322                         if (value("askcc") != NULL)
 323                                 grabh(hp, GCC);
 324                         if (value("askbcc") != NULL)
 325                                 grabh(hp, GBCC);
 326                 } else {
 327                         printf("EOT\n");
 328                         (void)fflush(stdout);
 329                 }
 330         }
 331         if (fsize(mtf) == 0) {
 332                 if (value("dontsendempty") != NULL)
 333                         goto out;
 334                 if (hp->h_subject == NULL)
 335                         printf("No message, no subject; hope that's ok\n");
 336                 else
 337                         printf("Null message body; hope that's ok\n");
 338         }
 339         /*
 340          * Now, take the user names from the combined
 341          * to and cc lists and do all the alias
 342          * processing.
 343          */
 344         senderr = 0;
 345         to = usermap(cat(hp->h_bcc, cat(hp->h_to, hp->h_cc)));
 346         if (to == NULL) {
 347                 printf("No recipients specified\n");
 348                 senderr++;
 349         }
 350         /*
 351          * Look through the recipient list for names with /'s
 352          * in them which we write to as files directly.
 353          */
 354         to = outof(to, mtf, hp);
 355         if (senderr)
 356                 savedeadletter(mtf);
 357         to = elide(to);
 358         if (count(to) == 0)
 359                 goto out;
 360         if (value("recordrecip") != NULL) {
 361                 /*
 362                  * Before fixing the header, save old To:.
 363                  * We do this because elide above has sorted To: list, and
 364                  * we would like to save message in a file named by the first
 365                  * recipient the user has entered, not the one being the first
 366                  * after sorting happened.
 367                  */
 368                 if ((nsto = malloc(sizeof(struct name))) == NULL)
 369                         err(1, "Out of memory");
 370                 bcopy(hp->h_to, nsto, sizeof(struct name));
 371         }
 372         fixhead(hp, to);
 373         if ((mtf = infix(hp, mtf)) == NULL) {
 374                 fprintf(stderr, ". . . message lost, sorry.\n");
 375                 return;
 376         }
 377         namelist = unpack(cat(hp->h_smopts, to));
 378         if (debug) {
 379                 char **t;
 380
 381                 printf("Sendmail arguments:");
 382                 for (t = namelist; *t != NULL; t++)
 383                         printf(" \"%s\"", *t);
 384                 printf("\n");
 385                 goto out;
 386         }
 387         if (value("recordrecip") != NULL) {
 388                 /*
 389                  * Extract first recipient username from saved To: and use it
 390                  * as a filename.
 391                  */
 392                 if ((nbuf = malloc(strlen(detract(nsto, 0)) + 1)) == NULL)
 393                         err(1, "Out of memory");
 394                 if ((cp = yanklogin(detract(nsto, 0), nbuf)) != NULL)
 395                         (void)savemail(expand(nbuf), mtf);
 396                 free(nbuf);
 397                 free(nsto);
 398         } else if ((cp = value("record")) != NULL) {
 399                 char * expanded_record_name = expand(cp);
 400                 char * outfolder = value("outfolder");
 401                 if ((outfolder != NULL) && (*expanded_record_name != '/')) {
 402                         char xname[PATHSIZE];
 403                         if (getfold(xname, sizeof(xname)) >= 0) {
 404                                 if (xname[strlen(xname)-1] != '/')
 405                                         strlcat(xname, "/", sizeof(xname)); /* only when needed */
 406                                 strlcat(xname, expanded_record_name, sizeof(xname));
 407                                 (void)savemail(xname, mtf);
 408                         } else { /* folder problem? - just save using "record" */
 409                                 (void)savemail(expanded_record_name, mtf);
 410                         }
 411                 } else {
 412                         (void)savemail(expanded_record_name, mtf);
 413                 }
 414         }
 415         /*
 416          * Fork, set up the temporary mail file as standard
 417          * input for "mail", and exec with the user list we generated
 418          * far above.
 419          */
 420         pid = fork();
 421         if (pid == -1) {
 422                 warn("fork");
 423                 savedeadletter(mtf);
 424                 goto out;
 425         }
 426         if (pid == 0) {
 427                 sigset_t nset;
 428                 (void)sigemptyset(&nset);
 429                 (void)sigaddset(&nset, SIGHUP);
 430                 (void)sigaddset(&nset, SIGINT);
 431                 (void)sigaddset(&nset, SIGQUIT);
 432                 (void)sigaddset(&nset, SIGTSTP);
 433                 (void)sigaddset(&nset, SIGTTIN);
 434                 (void)sigaddset(&nset, SIGTTOU);
 435                 prepare_child(&nset, fileno(mtf), -1);
 436                 if ((cp = value("sendmail")) != NULL)
 437                         cp = expand(cp);
 438                 else
 439                         cp = _PATH_SENDMAIL;
 440                 execv(cp, namelist);
 441                 warn("%s", cp);
 442                 _exit(1);
 443         }
 444         if (value("verbose") != NULL)
 445                 (void)wait_child(pid);
 446         else
 447                 free_child(pid);
 448 out:
 449         (void)Fclose(mtf);
 450 }
 451
 452 /*
 453  * Fix the header by glopping all of the expanded names from
 454  * the distribution list into the appropriate fields.
 455  */
 456 void
 457 fixhead(hp, tolist)
 458         struct header *hp;
 459         struct name *tolist;
 460 {
 461         struct name *np;
 462
 463         hp->h_to = NULL;
 464         hp->h_cc = NULL;
 465         hp->h_bcc = NULL;
 466         for (np = tolist; np != NULL; np = np->n_flink) {
 467                 /* Don't copy deleted addresses to the header */
 468                 if (np->n_type & GDEL)
 469                         continue;
 470                 if ((np->n_type & GMASK) == GTO)
 471                         hp->h_to =
 472                             cat(hp->h_to, nalloc(np->n_name, np->n_type));
 473                 else if ((np->n_type & GMASK) == GCC)
 474                         hp->h_cc =
 475                             cat(hp->h_cc, nalloc(np->n_name, np->n_type));
 476                 else if ((np->n_type & GMASK) == GBCC)
 477                         hp->h_bcc =
 478                             cat(hp->h_bcc, nalloc(np->n_name, np->n_type));
 479         }
 480 }
 481
 482 /*
 483  * Prepend a header in front of the collected stuff
 484  * and return the new file.
 485  */
 486 FILE *
 487 infix(hp, fi)
 488         struct header *hp;
 489         FILE *fi;
 490 {
 491         FILE *nfo, *nfi;
 492         int c, fd;
 493         char tempname[PATHSIZE];
 494
 495         (void)snprintf(tempname, sizeof(tempname),
 496             "%s/mail.RsXXXXXXXXXX", tmpdir);
 497         if ((fd = mkstemp(tempname)) == -1 ||
 498             (nfo = Fdopen(fd, "w")) == NULL) {
 499                 warn("%s", tempname);
 500                 return (fi);
 501         }
 502         if ((nfi = Fopen(tempname, "r")) == NULL) {
 503                 warn("%s", tempname);
 504                 (void)Fclose(nfo);
 505                 (void)rm(tempname);
 506                 return (fi);
 507         }
 508         (void)rm(tempname);
 509         (void)puthead(hp, nfo,
 510             GTO|GSUBJECT|GCC|GBCC|GREPLYTO|GINREPLYTO|GNL|GCOMMA);
 511         c = getc(fi);
 512         while (c != EOF) {
 513                 (void)putc(c, nfo);
 514                 c = getc(fi);
 515         }
 516         if (ferror(fi)) {
 517                 warnx("read");
 518                 rewind(fi);
 519                 return (fi);
 520         }
 521         (void)fflush(nfo);
 522         if (ferror(nfo)) {
 523                 warn("%s", tempname);
 524                 (void)Fclose(nfo);
 525                 (void)Fclose(nfi);
 526                 rewind(fi);
 527                 return (fi);
 528         }
 529         (void)Fclose(nfo);
 530         (void)Fclose(fi);
 531         rewind(nfi);
 532         return (nfi);
 533 }
 534
 535 /*
 536  * Dump the to, subject, cc header on the
 537  * passed file buffer.
 538  */
 539 int
 540 puthead(hp, fo, w)
 541         struct header *hp;
 542         FILE *fo;
 543         int w;
 544 {
 545         int gotcha;
 546
 547         gotcha = 0;
 548         if (hp->h_to != NULL && w & GTO)
 549                 fmt("To:", hp->h_to, fo, w&GCOMMA), gotcha++;
 550         if (hp->h_subject != NULL && w & GSUBJECT)
 551                 fprintf(fo, "Subject: %s\n", hp->h_subject), gotcha++;
 552         if (hp->h_cc != NULL && w & GCC)
 553                 fmt("Cc:", hp->h_cc, fo, w&GCOMMA), gotcha++;
 554         if (hp->h_bcc != NULL && w & GBCC)
 555                 fmt("Bcc:", hp->h_bcc, fo, w&GCOMMA), gotcha++;
 556         if (hp->h_replyto != NULL && w & GREPLYTO)
 557                 fprintf(fo, "Reply-To: %s\n", hp->h_replyto), gotcha++;
 558         if (hp->h_inreplyto != NULL && w & GINREPLYTO)
 559                 fprintf(fo, "In-Reply-To: <%s>\n", hp->h_inreplyto), gotcha++;
 560         if (gotcha && w & GNL)
 561                 (void)putc('\n', fo);
 562         return (0);
 563 }
 564
 565 /*
 566  * Format the given header line to not exceed 72 characters.
 567  */
 568 void
 569 fmt(str, np, fo, comma)
 570         const char *str;
 571         struct name *np;
 572         FILE *fo;
 573         int comma;
 574 {
 575         int col, len;
 576
 577         comma = comma ? 1 : 0;
 578         col = strlen(str);
 579         if (col)
 580                 fputs(str, fo);
 581         for (; np != NULL; np = np->n_flink) {
 582                 if (np->n_flink == NULL)
 583                         comma = 0;
 584                 len = strlen(np->n_name);
 585                 col++;          /* for the space */
 586                 if (col + len + comma > 72 && col > 4) {
 587                         fprintf(fo, "\n    ");
 588                         col = 4;
 589                 } else
 590                         fprintf(fo, " ");
 591                 fputs(np->n_name, fo);
 592                 if (comma)
 593                         fprintf(fo, ",");
 594                 col += len + comma;
 595         }
 596         fprintf(fo, "\n");
 597 }
 598
 599 /*
 600  * Save the outgoing mail on the passed file.
 601  */
 602
 603 /*ARGSUSED*/
 604 int
 605 savemail(name, fi)
 606         char name[];
 607         FILE *fi;
 608 {
 609         FILE *fo;
 610         char buf[BUFSIZ];
 611         int i;
 612         time_t now;
 613
 614         if ((fo = Fopen(name, "a")) == NULL) {
 615                 warn("%s", name);
 616                 return (-1);
 617         }
 618         (void)time(&now);
 619         fprintf(fo, "From %s %s", myname, ctime(&now));
 620         while ((i = fread(buf, 1, sizeof(buf), fi)) > 0)
 621                 (void)fwrite(buf, 1, i, fo);
 622         fprintf(fo, "\n");
 623         (void)fflush(fo);
 624         if (ferror(fo))
 625                 warn("%s", name);
 626         (void)Fclose(fo);
 627         rewind(fi);
 628         return (0);
 629 }