1 /* $OpenBSD: send.c,v 1.17 2003/06/03 02:56:11 millert Exp $ */ 2 /* $NetBSD: send.c,v 1.6 1996/06/08 19:48:39 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1980, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #ifndef lint 34 #if 0 35 static const char sccsid[] = "@(#)send.c 8.1 (Berkeley) 6/6/93"; 36 #else 37 static const char rcsid[] = "$OpenBSD: send.c,v 1.17 2003/06/03 02:56:11 millert Exp $"; 38 #endif 39 #endif /* not lint */ 40 41 #include "rcv.h" 42 #include "extern.h" 43 44 static volatile sig_atomic_t sendsignal; /* Interrupted by a signal? */ 45 46 /* 47 * Mail -- a mail program 48 * 49 * Mail to others. 50 */ 51 52 /* 53 * Send message described by the passed pointer to the 54 * passed output buffer. Return -1 on error. 55 * Adjust the status: field if need be. 56 * If doign is given, suppress ignored header fields. 57 * prefix is a string to prepend to each output line. 58 */ 59 int 60 sendmessage(struct message *mp, FILE *obuf, struct ignoretab *doign, 61 char *prefix) 62 { 63 int count; 64 FILE *ibuf; 65 char line[LINESIZE]; 66 char visline[4 * LINESIZE - 3]; 67 int ishead, infld, ignoring = 0, dostat, firstline; 68 char *cp, *cp2; 69 int c = 0; 70 int length; 71 int prefixlen = 0; 72 int rval; 73 int dovis; 74 struct sigaction act, saveint; 75 sigset_t oset; 76 77 sendsignal = 0; 78 rval = -1; 79 dovis = isatty(fileno(obuf)); 80 sigemptyset(&act.sa_mask); 81 act.sa_flags = SA_RESTART; 82 act.sa_handler = sendint; 83 (void)sigaction(SIGINT, &act, &saveint); 84 (void)sigprocmask(SIG_UNBLOCK, &intset, &oset); 85 86 /* 87 * Compute the prefix string, without trailing whitespace 88 */ 89 if (prefix != NULL) { 90 cp2 = 0; 91 for (cp = prefix; *cp; cp++) 92 if (*cp != ' ' && *cp != '\t') 93 cp2 = cp; 94 prefixlen = cp2 == 0 ? 0 : cp2 - prefix + 1; 95 } 96 ibuf = setinput(mp); 97 count = mp->m_size; 98 ishead = 1; 99 dostat = doign == 0 || !isign("status", doign); 100 infld = 0; 101 firstline = 1; 102 /* 103 * Process headers first 104 */ 105 while (count > 0 && ishead) { 106 if (fgets(line, sizeof(line), ibuf) == NULL) 107 break; 108 count -= length = strlen(line); 109 if (firstline) { 110 /* 111 * First line is the From line, so no headers 112 * there to worry about 113 */ 114 firstline = 0; 115 ignoring = doign == ignoreall; 116 } else if (line[0] == '\n') { 117 /* 118 * If line is blank, we've reached end of 119 * headers, so force out status: field 120 * and note that we are no longer in header 121 * fields 122 */ 123 if (dostat) { 124 if (statusput(mp, obuf, prefix) == -1) 125 goto out; 126 dostat = 0; 127 } 128 ishead = 0; 129 ignoring = doign == ignoreall; 130 } else if (infld && (line[0] == ' ' || line[0] == '\t')) { 131 /* 132 * If this line is a continuation (via space or tab) 133 * of a previous header field, just echo it 134 * (unless the field should be ignored). 135 * In other words, nothing to do. 136 */ 137 } else { 138 /* 139 * Pick up the header field if we have one. 140 */ 141 for (cp = line; (c = *cp++) && c != ':' && !isspace(c);) 142 ; 143 cp2 = --cp; 144 while (isspace(*cp++)) 145 ; 146 if (cp[-1] != ':') { 147 /* 148 * Not a header line, force out status: 149 * This happens in uucp style mail where 150 * there are no headers at all. 151 */ 152 if (dostat) { 153 if (statusput(mp, obuf, prefix) == -1) 154 goto out; 155 dostat = 0; 156 } 157 if (doign != ignoreall) 158 /* add blank line */ 159 (void)putc('\n', obuf); 160 ishead = 0; 161 ignoring = 0; 162 } else { 163 /* 164 * If it is an ignored field and 165 * we care about such things, skip it. 166 */ 167 *cp2 = 0; /* temporarily null terminate */ 168 if (doign && isign(line, doign)) 169 ignoring = 1; 170 else if ((line[0] == 's' || line[0] == 'S') && 171 strcasecmp(line, "status") == 0) { 172 /* 173 * If the field is "status," go compute 174 * and print the real Status: field 175 */ 176 if (dostat) { 177 if (statusput(mp, obuf, prefix) == -1) 178 goto out; 179 dostat = 0; 180 } 181 ignoring = 1; 182 } else { 183 ignoring = 0; 184 *cp2 = c; /* restore */ 185 } 186 infld = 1; 187 } 188 } 189 if (!ignoring) { 190 /* 191 * Strip trailing whitespace from prefix 192 * if line is blank. 193 */ 194 if (prefix != NULL) { 195 if (length > 1) 196 fputs(prefix, obuf); 197 else 198 (void)fwrite(prefix, sizeof(*prefix), 199 prefixlen, obuf); 200 } 201 if (dovis) { 202 length = strvis(visline, line, VIS_SAFE|VIS_NOSLASH); 203 (void)fwrite(visline, sizeof(*visline), length, obuf); 204 } else 205 (void)fwrite(line, sizeof(*line), length, obuf); 206 if (ferror(obuf)) 207 goto out; 208 } 209 if (sendsignal == SIGINT) 210 goto out; 211 } 212 /* 213 * Copy out message body 214 */ 215 if (doign == ignoreall) 216 count--; /* skip final blank line */ 217 while (count > 0) { 218 if (fgets(line, sizeof(line), ibuf) == NULL) { 219 c = 0; 220 break; 221 } 222 count -= c = strlen(line); 223 if (prefix != NULL) { 224 /* 225 * Strip trailing whitespace from prefix 226 * if line is blank. 227 */ 228 if (c > 1) 229 fputs(prefix, obuf); 230 else 231 (void)fwrite(prefix, sizeof(*prefix), 232 prefixlen, obuf); 233 } 234 /* 235 * We can't read the record file (or inbox for recipient) 236 * properly with 'From ' lines in the message body (from 237 * forwarded messages or sentences starting with "From "), 238 * so we will prepend those lines with a '>'. 239 */ 240 if (strncmp(line, "From ", 5) == 0) 241 (void)fwrite(">", 1, 1, obuf); /* '>' before 'From ' */ 242 if (dovis) { 243 length = strvis(visline, line, VIS_SAFE|VIS_NOSLASH); 244 (void)fwrite(visline, sizeof(*visline), length, obuf); 245 } else 246 (void)fwrite(line, sizeof(*line), c, obuf); 247 if (ferror(obuf) || sendsignal == SIGINT) 248 goto out; 249 } 250 if (doign == ignoreall && c > 0 && line[c - 1] != '\n') 251 /* no final blank line */ 252 if ((c = getc(ibuf)) != EOF && putc(c, obuf) == EOF) 253 goto out; 254 rval = 0; 255 out: 256 sendsignal = 0; 257 (void)sigprocmask(SIG_SETMASK, &oset, NULL); 258 (void)sigaction(SIGINT, &saveint, NULL); 259 return(rval); 260 } 261 262 /* 263 * Output a reasonable looking status field. 264 */ 265 int 266 statusput(struct message *mp, FILE *obuf, char *prefix) 267 { 268 char statout[3]; 269 char *cp = statout; 270 271 if (mp->m_flag & MREAD) 272 *cp++ = 'R'; 273 if ((mp->m_flag & MNEW) == 0) 274 *cp++ = 'O'; 275 *cp = 0; 276 if (statout[0]) { 277 fprintf(obuf, "%sStatus: %s\n", 278 prefix == NULL ? "" : prefix, statout); 279 return(ferror(obuf) ? -1 : 0); 280 } 281 return(0); 282 } 283 284 /* 285 * Interface between the argument list and the mail1 routine 286 * which does all the dirty work. 287 */ 288 int 289 mail(struct name *to, struct name *cc, struct name *bcc, struct name *smopts, 290 char *subject) 291 { 292 struct header head; 293 294 head.h_to = to; 295 head.h_subject = subject; 296 head.h_cc = cc; 297 head.h_bcc = bcc; 298 head.h_smopts = smopts; 299 mail1(&head, 0); 300 return(0); 301 } 302 303 304 /* 305 * Send mail to a bunch of user names. The interface is through 306 * the mail routine below. 307 */ 308 int 309 sendmail(void *v) 310 { 311 char *str = v; 312 struct header head; 313 314 head.h_to = extract(str, GTO); 315 head.h_subject = NULL; 316 head.h_cc = NULL; 317 head.h_bcc = NULL; 318 head.h_smopts = NULL; 319 mail1(&head, 0); 320 return(0); 321 } 322 323 /* 324 * Mail a message on standard input to the people indicated 325 * in the passed header. (Internal interface). 326 */ 327 void 328 mail1(struct header *hp, int printheaders) 329 { 330 char *cp; 331 pid_t pid; 332 char **namelist; 333 struct name *to; 334 FILE *mtf; 335 336 /* 337 * Collect user's mail from standard input. 338 * Get the result as mtf. 339 */ 340 if ((mtf = collect(hp, printheaders)) == NULL) 341 return; 342 if (fsize(mtf) == 0) { 343 if (hp->h_subject == NULL) 344 puts("No message, no subject; hope that's ok"); 345 else 346 puts("Null message body; hope that's ok"); 347 } 348 /* 349 * Now, take the user names from the combined 350 * to and cc lists and do all the alias 351 * processing. 352 */ 353 senderr = 0; 354 to = usermap(cat(hp->h_bcc, cat(hp->h_to, hp->h_cc))); 355 if (to == NULL) { 356 puts("No recipients specified"); 357 senderr++; 358 } 359 /* 360 * Look through the recipient list for names with /'s 361 * in them which we write to as files directly. 362 */ 363 to = outof(to, mtf, hp); 364 if (senderr) 365 savedeadletter(mtf); 366 to = elide(to); 367 if (count(to) == 0) 368 goto out; 369 fixhead(hp, to); 370 if ((mtf = infix(hp, mtf)) == NULL) { 371 fputs(". . . message lost, sorry.\n", stderr); 372 return; 373 } 374 namelist = unpack(hp->h_smopts, to); 375 if (debug) { 376 char **t; 377 378 fputs("Sendmail arguments:", stdout); 379 for (t = namelist; *t != NULL; t++) 380 printf(" \"%s\"", *t); 381 putchar('\n'); 382 goto out; 383 } 384 if ((cp = value("record")) != NULL) 385 (void)savemail(expand(cp), mtf); 386 /* 387 * Fork, set up the temporary mail file as standard 388 * input for "mail", and exec with the user list we generated 389 * far above. 390 */ 391 pid = fork(); 392 if (pid == -1) { 393 warn("fork"); 394 savedeadletter(mtf); 395 goto out; 396 } 397 if (pid == 0) { 398 sigset_t nset; 399 400 sigemptyset(&nset); 401 sigaddset(&nset, SIGHUP); 402 sigaddset(&nset, SIGINT); 403 sigaddset(&nset, SIGQUIT); 404 sigaddset(&nset, SIGTSTP); 405 sigaddset(&nset, SIGTTIN); 406 sigaddset(&nset, SIGTTOU); 407 prepare_child(&nset, fileno(mtf), -1); 408 if ((cp = value("sendmail")) != NULL) 409 cp = expand(cp); 410 else 411 cp = _PATH_SENDMAIL; 412 execv(cp, namelist); 413 warn("%s", cp); 414 _exit(1); 415 } 416 if (value("verbose") != NULL) 417 (void)wait_child(pid); 418 else 419 free_child(pid); 420 out: 421 (void)Fclose(mtf); 422 } 423 424 /* 425 * Fix the header by glopping all of the expanded names from 426 * the distribution list into the appropriate fields. 427 */ 428 void 429 fixhead(struct header *hp, struct name *tolist) 430 { 431 struct name *np; 432 433 hp->h_to = NULL; 434 hp->h_cc = NULL; 435 hp->h_bcc = NULL; 436 for (np = tolist; np != NULL; np = np->n_flink) 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 * Prepend a header in front of the collected stuff 450 * and return the new file. 451 */ 452 FILE * 453 infix(struct header *hp, FILE *fi) 454 { 455 FILE *nfo, *nfi; 456 int c, fd; 457 char tempname[PATHSIZE]; 458 459 (void)snprintf(tempname, sizeof(tempname), 460 "%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 (void)Fclose(nfo); 469 (void)rm(tempname); 470 return(fi); 471 } 472 (void)rm(tempname); 473 (void)puthead(hp, nfo, GTO|GSUBJECT|GCC|GBCC|GNL|GCOMMA); 474 c = getc(fi); 475 while (c != EOF) { 476 (void)putc(c, nfo); 477 c = getc(fi); 478 } 479 if (ferror(fi)) { 480 warn("read"); 481 rewind(fi); 482 return(fi); 483 } 484 (void)fflush(nfo); 485 if (ferror(nfo)) { 486 warn("%s", tempname); 487 (void)Fclose(nfo); 488 (void)Fclose(nfi); 489 rewind(fi); 490 return(fi); 491 } 492 (void)Fclose(nfo); 493 (void)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 (gotcha && w & GNL) 517 (void)putc('\n', fo); 518 return(0); 519 } 520 521 /* 522 * Format the given header line to not exceed 72 characters. 523 */ 524 void 525 fmt(char *str, struct name *np, FILE *fo, int comma) 526 { 527 int col, len; 528 529 comma = comma ? 1 : 0; 530 col = strlen(str); 531 if (col) 532 fputs(str, fo); 533 for (; np != NULL; np = np->n_flink) { 534 if (np->n_flink == NULL) 535 comma = 0; 536 len = strlen(np->n_name); 537 col++; /* for the space */ 538 if (col + len + comma > 72 && col > 4) { 539 fputs("\n ", fo); 540 col = 4; 541 } else 542 putc(' ', fo); 543 fputs(np->n_name, fo); 544 if (comma) 545 putc(',', fo); 546 col += len + comma; 547 } 548 putc('\n', fo); 549 } 550 551 /* 552 * Save the outgoing mail on the passed file. 553 */ 554 /*ARGSUSED*/ 555 int 556 savemail(char *name, FILE *fi) 557 { 558 FILE *fo; 559 char buf[BUFSIZ]; 560 time_t now; 561 562 if ((fo = Fopen(name, "a")) == NULL) { 563 warn("%s", name); 564 return(-1); 565 } 566 (void)time(&now); 567 fprintf(fo, "From %s %s", myname, ctime(&now)); 568 while (fgets(buf, sizeof(buf), fi) == buf) { 569 /* 570 * We can't read the record file (or inbox for recipient) 571 * in the message body (from forwarded messages or sentences 572 * starting with "From "), so we will prepend those lines with 573 * a '>'. 574 */ 575 if (strncmp(buf, "From ", 5) == 0) 576 (void)fwrite(">", 1, 1, fo); /* '>' before 'From ' */ 577 (void)fwrite(buf, 1, strlen(buf), fo); 578 } 579 (void)putc('\n', fo); 580 (void)fflush(fo); 581 if (ferror(fo)) 582 warn("%s", name); 583 (void)Fclose(fo); 584 rewind(fi); 585 return(0); 586 } 587 588 /*ARGSUSED*/ 589 void 590 sendint(int s) 591 { 592 593 sendsignal = s; 594 } 595