usr.bin/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  * @(#)send.c   8.1 (Berkeley) 6/6/93
  34  * $FreeBSD: src/usr.bin/mail/send.c,v 1.5.6.5 2003/01/06 05:46:03 mikeh Exp $
  35  * $DragonFly: src/usr.bin/mail/send.c,v 1.5 2004/09/08 03:01:11 joerg Exp $
  36  */
  37
  38 #include "rcv.h"
  39 #include "extern.h"
  40
  41 /*
  42  * Mail -- a mail program
  43  *
  44  * Mail to others.
  45  */
  46
  47 /*
  48  * Send message described by the passed pointer to the
  49  * passed output buffer.  Return -1 on error.
  50  * Adjust the status: field if need be.
  51  * If doign is given, suppress ignored header fields.
  52  * prefix is a string to prepend to each output line.
  53  */
  54 int
  55 sendmessage(struct message *mp, FILE *obuf, struct ignoretab *doign,
  56             char *prefix)
  57 {
  58         long count;
  59         FILE *ibuf;
  60         char *cp, *cp2, line[LINESIZE];
  61         int ishead, infld, ignoring, dostat, firstline;
  62         int c, length, prefixlen;
  63
  64         /*
  65          * Compute the prefix string, without trailing whitespace
  66          */
  67         if (prefix != NULL) {
  68                 cp2 = 0;
  69                 for (cp = prefix; *cp != '\0'; cp++)
  70                         if (*cp != ' ' && *cp != '\t')
  71                                 cp2 = cp;
  72                 prefixlen = cp2 == NULL ? 0 : cp2 - prefix + 1;
  73         }
  74         ibuf = setinput(mp);
  75         count = mp->m_size;
  76         ishead = 1;
  77         dostat = doign == 0 || !isign("status", doign);
  78         infld = 0;
  79         firstline = 1;
  80         /*
  81          * Process headers first
  82          */
  83         while (count > 0 && ishead) {
  84                 if (fgets(line, sizeof(line), ibuf) == NULL)
  85                         break;
  86                 count -= length = strlen(line);
  87                 if (firstline) {
  88                         /*
  89                          * First line is the From line, so no headers
  90                          * there to worry about
  91                          */
  92                         firstline = 0;
  93                         ignoring = doign == ignoreall;
  94                 } else if (line[0] == '\n') {
  95                         /*
  96                          * If line is blank, we've reached end of
  97                          * headers, so force out status: field
  98                          * and note that we are no longer in header
  99                          * fields
 100                          */
 101                         if (dostat) {
 102                                 statusput(mp, obuf, prefix);
 103                                 dostat = 0;
 104                         }
 105                         ishead = 0;
 106                         ignoring = doign == ignoreall;
 107                 } else if (infld && (line[0] == ' ' || line[0] == '\t')) {
 108                         /*
 109                          * If this line is a continuation (via space or tab)
 110                          * of a previous header field, just echo it
 111                          * (unless the field should be ignored).
 112                          * In other words, nothing to do.
 113                          */
 114                 } else {
 115                         /*
 116                          * Pick up the header field if we have one.
 117                          */
 118                         for (cp = line; (c = *cp++) != '\0' && c != ':' &&
 119                             !isspace((unsigned char)c);)
 120                                 ;
 121                         cp2 = --cp;
 122                         while (isspace((unsigned char)*cp++))
 123                                 ;
 124                         if (cp[-1] != ':') {
 125                                 /*
 126                                  * Not a header line, force out status:
 127                                  * This happens in uucp style mail where
 128                                  * there are no headers at all.
 129                                  */
 130                                 if (dostat) {
 131                                         statusput(mp, obuf, prefix);
 132                                         dostat = 0;
 133                                 }
 134                                 if (doign != ignoreall)
 135                                         /* add blank line */
 136                                         putc('\n', obuf);
 137                                 ishead = 0;
 138                                 ignoring = 0;
 139                         } else {
 140                                 /*
 141                                  * If it is an ignored field and
 142                                  * we care about such things, skip it.
 143                                  */
 144                                 *cp2 = '\0';    /* temporarily null terminate */
 145                                 if (doign && isign(line, doign))
 146                                         ignoring = 1;
 147                                 else if ((line[0] == 's' || line[0] == 'S') &&
 148                                          strcasecmp(line, "status") == 0) {
 149                                         /*
 150                                          * If the field is "status," go compute
 151                                          * and print the real Status: field
 152                                          */
 153                                         if (dostat) {
 154                                                 statusput(mp, obuf, prefix);
 155                                                 dostat = 0;
 156                                         }
 157                                         ignoring = 1;
 158                                 } else {
 159                                         ignoring = 0;
 160                                         *cp2 = c;       /* restore */
 161                                 }
 162                                 infld = 1;
 163                         }
 164                 }
 165                 if (!ignoring) {
 166                         /*
 167                          * Strip trailing whitespace from prefix
 168                          * if line is blank.
 169                          */
 170                         if (prefix != NULL) {
 171                                 if (length > 1)
 172                                         fputs(prefix, obuf);
 173                                 else
 174                                         fwrite(prefix, sizeof(*prefix),
 175                                             prefixlen, obuf);
 176                         }
 177                         fwrite(line, sizeof(*line), length, obuf);
 178                         if (ferror(obuf))
 179                                 return (-1);
 180                 }
 181         }
 182         /*
 183          * Copy out message body
 184          */
 185         if (doign == ignoreall)
 186                 count--;                /* skip final blank line */
 187         if (prefix != NULL)
 188                 while (count > 0) {
 189                         if (fgets(line, sizeof(line), ibuf) == NULL) {
 190                                 c = 0;
 191                                 break;
 192                         }
 193                         count -= c = strlen(line);
 194                         /*
 195                          * Strip trailing whitespace from prefix
 196                          * if line is blank.
 197                          */
 198                         if (c > 1)
 199                                 fputs(prefix, obuf);
 200                         else
 201                                 fwrite(prefix, sizeof(*prefix),
 202                                     prefixlen, obuf);
 203                         fwrite(line, sizeof(*line), c, obuf);
 204                         if (ferror(obuf))
 205                                 return (-1);
 206                 }
 207         else
 208                 while (count > 0) {
 209                         c = count < LINESIZE ? count : LINESIZE;
 210                         if ((c = fread(line, sizeof(*line), c, ibuf)) <= 0)
 211                                 break;
 212                         count -= c;
 213                         if (fwrite(line, sizeof(*line), c, obuf) != c)
 214                                 return (-1);
 215                 }
 216         if (doign == ignoreall && c > 0 && line[c - 1] != '\n')
 217                 /* no final blank line */
 218                 if ((c = getc(ibuf)) != EOF && putc(c, obuf) == EOF)
 219                         return (-1);
 220         return (0);
 221 }
 222
 223 /*
 224  * Output a reasonable looking status field.
 225  */
 226 void
 227 statusput(struct message *mp, FILE *obuf, char *prefix)
 228 {
 229         char statout[3];
 230         char *cp = statout;
 231
 232         if (mp->m_flag & MREAD)
 233                 *cp++ = 'R';
 234         if ((mp->m_flag & MNEW) == 0)
 235                 *cp++ = 'O';
 236         *cp = '\0';
 237         if (statout[0] != '\0')
 238                 fprintf(obuf, "%sStatus: %s\n",
 239                         prefix == NULL ? "" : prefix, statout);
 240 }
 241
 242 /*
 243  * Interface between the argument list and the mail1 routine
 244  * which does all the dirty work.
 245  */
 246 int
 247 mail(struct name *to, struct name *cc, struct name *bcc, struct name *smopts,
 248      char *subject, char *replyto)
 249 {
 250         struct header head;
 251
 252         head.h_to = to;
 253         head.h_subject = subject;
 254         head.h_cc = cc;
 255         head.h_bcc = bcc;
 256         head.h_smopts = smopts;
 257         head.h_replyto = replyto;
 258         head.h_inreplyto = NULL;
 259         mail1(&head, 0);
 260         return (0);
 261 }
 262
 263
 264 /*
 265  * Send mail to a bunch of user names.  The interface is through
 266  * the mail routine below.
 267  */
 268 int
 269 sendmail(char *str)
 270 {
 271         struct header head;
 272
 273         head.h_to = extract(str, GTO);
 274         head.h_subject = NULL;
 275         head.h_cc = NULL;
 276         head.h_bcc = NULL;
 277         head.h_smopts = NULL;
 278         head.h_replyto = value("REPLYTO");
 279         head.h_inreplyto = NULL;
 280         mail1(&head, 0);
 281         return (0);
 282 }
 283
 284 /*
 285  * Mail a message on standard input to the people indicated
 286  * in the passed header.  (Internal interface).
 287  */
 288 void
 289 mail1(struct header *hp, int printheaders)
 290 {
 291         char *cp;
 292         char *nbuf;
 293         int pid;
 294         char **namelist;
 295         struct name *to, *nsto;
 296         FILE *mtf;
 297
 298         /*
 299          * Collect user's mail from standard input.
 300          * Get the result as mtf.
 301          */
 302         if ((mtf = collect(hp, printheaders)) == NULL)
 303                 return;
 304         if (value("interactive") != NULL) {
 305                 if (value("askcc") != NULL || value("askbcc") != NULL) {
 306                         if (value("askcc") != NULL)
 307                                 grabh(hp, GCC);
 308                         if (value("askbcc") != NULL)
 309                                 grabh(hp, GBCC);
 310                 } else {
 311                         printf("EOT\n");
 312                         fflush(stdout);
 313                 }
 314         }
 315         if (fsize(mtf) == 0) {
 316                 if (value("dontsendempty") != NULL)
 317                         goto out;
 318                 if (hp->h_subject == NULL)
 319                         printf("No message, no subject; hope that's ok\n");
 320                 else
 321                         printf("Null message body; hope that's ok\n");
 322         }
 323         /*
 324          * Now, take the user names from the combined
 325          * to and cc lists and do all the alias
 326          * processing.
 327          */
 328         senderr = 0;
 329         to = usermap(cat(hp->h_bcc, cat(hp->h_to, hp->h_cc)));
 330         if (to == NULL) {
 331                 printf("No recipients specified\n");
 332                 senderr++;
 333         }
 334         /*
 335          * Look through the recipient list for names with /'s
 336          * in them which we write to as files directly.
 337          */
 338         to = outof(to, mtf, hp);
 339         if (senderr)
 340                 savedeadletter(mtf);
 341         to = elide(to);
 342         if (count(to) == 0)
 343                 goto out;
 344         if (value("recordrecip") != NULL) {
 345                 /*
 346                  * Before fixing the header, save old To:.
 347                  * We do this because elide above has sorted To: list,
 348                  * and we would like to save the message in a file named by
 349                  * the first recipient the user has entered, not the one being
 350                  * the first after sorting happened.
 351                  */
 352                  if ((nsto = malloc(sizeof(struct name))) == NULL)
 353                         err(1, "Out of memory");
 354                 bcopy(hp->h_to, nsto, sizeof(struct name));
 355         }
 356         fixhead(hp, to);
 357         if ((mtf = infix(hp, mtf)) == NULL) {
 358                 fprintf(stderr, ". . . message lost, sorry.\n");
 359                 return;
 360         }
 361         namelist = unpack(cat(hp->h_smopts, to));
 362         if (debug) {
 363                 char **t;
 364
 365                 printf("Sendmail arguments:");
 366                 for (t = namelist; *t != NULL; t++)
 367                         printf(" \"%s\"", *t);
 368                 printf("\n");
 369                 goto out;
 370         }
 371         if (value("recordrecip") != NULL) {
 372                 /*
 373                  * Extract first recipient username from save To: and use it
 374                  * as a filename.
 375                  */
 376                  if ((nbuf = malloc(strlen(detract(nsto, 0)) + 1)) == NULL)
 377                         err(1, "Out of memory");
 378                 if ((cp = yanklogin(detract(nsto, 0), nbuf)) != NULL)
 379                         savemail(expand(nbuf), mtf);
 380                 free(nbuf);
 381                 free(nsto);
 382         } else if ((cp = value("record")) != NULL)
 383                 savemail(expand(cp), mtf);
 384         /*
 385          * Fork, set up the temporary mail file as standard
 386          * input for "mail", and exec with the user list we generated
 387          * far above.
 388          */
 389         pid = fork();
 390         if (pid == -1) {
 391                 warn("fork");
 392                 savedeadletter(mtf);
 393                 goto out;
 394         }
 395         if (pid == 0) {
 396                 sigset_t nset;
 397                 sigemptyset(&nset);
 398                 sigaddset(&nset, SIGHUP);
 399                 sigaddset(&nset, SIGINT);
 400                 sigaddset(&nset, SIGQUIT);
 401                 sigaddset(&nset, SIGTSTP);
 402                 sigaddset(&nset, SIGTTIN);
 403                 sigaddset(&nset, SIGTTOU);
 404                 prepare_child(&nset, fileno(mtf), -1);
 405                 if ((cp = value("sendmail")) != NULL)
 406                         cp = expand(cp);
 407                 else
 408                         cp = _PATH_SENDMAIL;
 409                 execv(cp, namelist);
 410                 warn("%s", cp);
 411                 _exit(1);
 412         }
 413         if (value("verbose") != NULL)
 414                 wait_child(pid);
 415         else
 416                 free_child(pid);
 417 out:
 418         Fclose(mtf);
 419 }
 420
 421 /*
 422  * Fix the header by glopping all of the expanded names from
 423  * the distribution list into the appropriate fields.
 424  */
 425 void
 426 fixhead(struct header *hp, struct name *tolist)
 427 {
 428         struct name *np;
 429
 430         hp->h_to = NULL;
 431         hp->h_cc = NULL;
 432         hp->h_bcc = NULL;
 433         for (np = tolist; np != NULL; np = np->n_flink) {
 434                 /* Don't copy deleted addresses to the header */
 435                 if (np->n_type & GDEL)
 436                         continue;
 437                 if ((np->n_type & GMASK) == GTO)
 438                         hp->h_to =
 439                             cat(hp->h_to, nalloc(np->n_name, np->n_type));
 440                 else if ((np->n_type & GMASK) == GCC)
 441                         hp->h_cc =
 442                             cat(hp->h_cc, nalloc(np->n_name, np->n_type));
 443                 else if ((np->n_type & GMASK) == GBCC)
 444                         hp->h_bcc =
 445                             cat(hp->h_bcc, nalloc(np->n_name, np->n_type));
 446         }
 447 }
 448
 449 /*
 450  * Prepend a header in front of the collected stuff
 451  * and return the new file.
 452  */
 453 FILE *
 454 infix(struct header *hp, FILE *fi)
 455 {
 456         FILE *nfo, *nfi;
 457         int c, fd;
 458         char tempname[PATHSIZE];
 459
 460         snprintf(tempname, sizeof(tempname), "%s/mail.RsXXXXXXXXXX", tmpdir);
 461         if ((fd = mkstemp(tempname)) == -1 ||
 462             (nfo = Fdopen(fd, "w")) == NULL) {
 463                 warn("%s", tempname);
 464                 return (fi);
 465         }
 466         if ((nfi = Fopen(tempname, "r")) == NULL) {
 467                 warn("%s", tempname);
 468                 Fclose(nfo);
 469                 rm(tempname);
 470                 return (fi);
 471         }
 472         rm(tempname);
 473         puthead(hp, nfo, GTO|GSUBJECT|GCC|GBCC|GREPLYTO|GINREPLYTO|GNL|GCOMMA);
 474         c = getc(fi);
 475         while (c != EOF) {
 476                 putc(c, nfo);
 477                 c = getc(fi);
 478         }
 479         if (ferror(fi)) {
 480                 warnx("read");
 481                 rewind(fi);
 482                 return (fi);
 483         }
 484         fflush(nfo);
 485         if (ferror(nfo)) {
 486                 warn("%s", tempname);
 487                 Fclose(nfo);
 488                 Fclose(nfi);
 489                 rewind(fi);
 490                 return (fi);
 491         }
 492         Fclose(nfo);
 493         Fclose(fi);
 494         rewind(nfi);
 495         return (nfi);
 496 }
 497
 498 /*
 499  * Dump the to, subject, cc header on the
 500  * passed file buffer.
 501  */
 502 int
 503 puthead(struct header *hp, FILE *fo, int w)
 504 {
 505         int gotcha;
 506
 507         gotcha = 0;
 508         if (hp->h_to != NULL && w & GTO)
 509                 fmt("To:", hp->h_to, fo, w&GCOMMA), gotcha++;
 510         if (hp->h_subject != NULL && w & GSUBJECT)
 511                 fprintf(fo, "Subject: %s\n", hp->h_subject), gotcha++;
 512         if (hp->h_cc != NULL && w & GCC)
 513                 fmt("Cc:", hp->h_cc, fo, w&GCOMMA), gotcha++;
 514         if (hp->h_bcc != NULL && w & GBCC)
 515                 fmt("Bcc:", hp->h_bcc, fo, w&GCOMMA), gotcha++;
 516         if (hp->h_replyto != NULL && w & GREPLYTO)
 517                 fprintf(fo, "Reply-To: %s\n", hp->h_replyto), gotcha++;
 518         if (hp->h_inreplyto != NULL && w & GINREPLYTO)
 519                 fprintf(fo, "In-Reply-To: <%s>\n", hp->h_inreplyto), gotcha++;
 520         if (gotcha && w & GNL)
 521                 putc('\n', fo);
 522         return (0);
 523 }
 524
 525 /*
 526  * Format the given header line to not exceed 72 characters.
 527  */
 528 void
 529 fmt(const char *str, struct name *np, FILE *fo, int comma)
 530 {
 531         int col, len;
 532
 533         comma = comma ? 1 : 0;
 534         col = strlen(str);
 535         if (col)
 536                 fputs(str, fo);
 537         for (; np != NULL; np = np->n_flink) {
 538                 if (np->n_flink == NULL)
 539                         comma = 0;
 540                 len = strlen(np->n_name);
 541                 col++;          /* for the space */
 542                 if (col + len + comma > 72 && col > 4) {
 543                         fprintf(fo, "\n    ");
 544                         col = 4;
 545                 } else
 546                         fprintf(fo, " ");
 547                 fputs(np->n_name, fo);
 548                 if (comma)
 549                         fprintf(fo, ",");
 550                 col += len + comma;
 551         }
 552         fprintf(fo, "\n");
 553 }
 554
 555 /*
 556  * Save the outgoing mail on the passed file.
 557  */
 558
 559 /*ARGSUSED*/
 560 int
 561 savemail(char *name, FILE *fi)
 562 {
 563         FILE *fo;
 564         char buf[BUFSIZ];
 565         int i;
 566         time_t now;
 567
 568         if ((fo = Fopen(name, "a")) == NULL) {
 569                 warn("%s", name);
 570                 return (-1);
 571         }
 572         time(&now);
 573         fprintf(fo, "From %s %s", myname, ctime(&now));
 574         while ((i = fread(buf, 1, sizeof(buf), fi)) > 0)
 575                 fwrite(buf, 1, i, fo);
 576         fprintf(fo, "\n");
 577         fflush(fo);
 578         if (ferror(fo))
 579                 warn("%s", name);
 580         Fclose(fo);
 581         rewind(fi);
 582         return (0);
 583 }