1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653
|
/* $OpenBSD: send.c,v 1.23 2014/01/17 18:42:30 okan Exp $ */
/* $NetBSD: send.c,v 1.6 1996/06/08 19:48:39 christos Exp $ */
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <time.h>
#include "rcv.h"
#include "extern.h"
static volatile sig_atomic_t sendsignal; /* Interrupted by a signal? */
/*
* Mail -- a mail program
*
* Mail to others.
*/
/*
* Send message described by the passed pointer to the
* passed output buffer. Return -1 on error.
* Adjust the status: field if need be.
* If doign is given, suppress ignored header fields.
* prefix is a string to prepend to each output line.
*/
int
sendmessage(struct message *mp, FILE *obuf, struct ignoretab *doign,
char *prefix)
{
int count;
FILE *ibuf;
char line[LINESIZE];
char visline[4 * LINESIZE - 3];
int ishead, infld, ignoring = 0, dostat, firstline;
char *cp, *cp2;
int c = 0;
int length;
int prefixlen = 0;
int rval;
int dovis;
struct sigaction act, saveint;
sigset_t oset;
sendsignal = 0;
rval = -1;
dovis = isatty(fileno(obuf));
sigemptyset(&act.sa_mask);
act.sa_flags = SA_RESTART;
act.sa_handler = sendint;
(void)sigaction(SIGINT, &act, &saveint);
(void)sigprocmask(SIG_UNBLOCK, &intset, &oset);
/*
* Compute the prefix string, without trailing whitespace
*/
if (prefix != NULL) {
cp2 = 0;
for (cp = prefix; *cp; cp++)
if (*cp != ' ' && *cp != '\t')
cp2 = cp;
prefixlen = cp2 == 0 ? 0 : cp2 - prefix + 1;
}
ibuf = setinput(mp);
count = mp->m_size;
ishead = 1;
dostat = doign == 0 || !isign("status", doign);
infld = 0;
firstline = 1;
/*
* Process headers first
*/
while (count > 0 && ishead) {
if (fgets(line, sizeof(line), ibuf) == NULL)
break;
count -= length = strlen(line);
if (firstline) {
/*
* First line is the From line, so no headers
* there to worry about
*/
firstline = 0;
ignoring = doign == ignoreall;
} else if (line[0] == '\n') {
/*
* If line is blank, we've reached end of
* headers, so force out status: field
* and note that we are no longer in header
* fields
*/
if (dostat) {
if (statusput(mp, obuf, prefix) == -1)
goto out;
dostat = 0;
}
ishead = 0;
ignoring = doign == ignoreall;
} else if (infld && (line[0] == ' ' || line[0] == '\t')) {
/*
* If this line is a continuation (via space or tab)
* of a previous header field, just echo it
* (unless the field should be ignored).
* In other words, nothing to do.
*/
} else {
/*
* Pick up the header field if we have one.
*/
for (cp = line;
(c = (unsigned char)*cp++) && c != ':' && !isspace(c); )
;
cp2 = --cp;
while (isspace((unsigned char)*cp++))
;
if (cp[-1] != ':') {
/*
* Not a header line, force out status:
* This happens in uucp style mail where
* there are no headers at all.
*/
if (dostat) {
if (statusput(mp, obuf, prefix) == -1)
goto out;
dostat = 0;
}
if (doign != ignoreall)
/* add blank line */
(void)putc('\n', obuf);
ishead = 0;
ignoring = 0;
} else {
/*
* If it is an ignored field and
* we care about such things, skip it.
*/
*cp2 = 0; /* temporarily null terminate */
if (doign && isign(line, doign))
ignoring = 1;
else if (strcasecmp(line, "status") == 0) {
/*
* If the field is "status," go compute
* and print the real Status: field
*/
if (dostat) {
if (statusput(mp, obuf, prefix) == -1)
goto out;
dostat = 0;
}
ignoring = 1;
} else {
ignoring = 0;
*cp2 = c; /* restore */
}
infld = 1;
}
}
if (!ignoring) {
/*
* Strip trailing whitespace from prefix
* if line is blank.
*/
if (prefix != NULL) {
if (length > 1)
fputs(prefix, obuf);
else
(void)fwrite(prefix, sizeof(*prefix),
prefixlen, obuf);
}
if (dovis) {
length = strvis(visline, line, VIS_SAFE|VIS_NOSLASH);
(void)fwrite(visline, sizeof(*visline), length, obuf);
} else
(void)fwrite(line, sizeof(*line), length, obuf);
if (ferror(obuf))
goto out;
}
if (sendsignal == SIGINT)
goto out;
}
/*
* Copy out message body
*/
if (doign == ignoreall)
count--; /* skip final blank line */
while (count > 0) {
if (fgets(line, sizeof(line), ibuf) == NULL) {
c = 0;
break;
}
count -= c = strlen(line);
if (prefix != NULL) {
/*
* Strip trailing whitespace from prefix
* if line is blank.
*/
if (c > 1)
fputs(prefix, obuf);
else
(void)fwrite(prefix, sizeof(*prefix),
prefixlen, obuf);
}
/*
* We can't read the record file (or inbox for recipient)
* properly with 'From ' lines in the message body (from
* forwarded messages or sentences starting with "From "),
* so we will prepend those lines with a '>'.
*/
if (strncmp(line, "From ", 5) == 0)
(void)fwrite(">", 1, 1, obuf); /* '>' before 'From ' */
if (dovis) {
length = strvis(visline, line, VIS_SAFE|VIS_NOSLASH);
(void)fwrite(visline, sizeof(*visline), length, obuf);
} else
(void)fwrite(line, sizeof(*line), c, obuf);
if (ferror(obuf) || sendsignal == SIGINT)
goto out;
}
if (doign == ignoreall && c > 0 && line[c - 1] != '\n')
/* no final blank line */
if ((c = getc(ibuf)) != EOF && putc(c, obuf) == EOF)
goto out;
rval = 0;
out:
sendsignal = 0;
(void)sigprocmask(SIG_SETMASK, &oset, NULL);
(void)sigaction(SIGINT, &saveint, NULL);
return(rval);
}
/*
* Output a reasonable looking status field.
*/
int
statusput(struct message *mp, FILE *obuf, char *prefix)
{
char statout[3];
char *cp = statout;
if (mp->m_flag & MREAD)
*cp++ = 'R';
if ((mp->m_flag & MNEW) == 0)
*cp++ = 'O';
*cp = 0;
if (statout[0]) {
fprintf(obuf, "%sStatus: %s\n",
prefix == NULL ? "" : prefix, statout);
return(ferror(obuf) ? -1 : 0);
}
return(0);
}
/*
* Interface between the argument list and the mail1 routine
* which does all the dirty work.
*/
int
mail(struct name *to, struct name *cc, struct name *bcc, struct name *smopts,
char *subject, char *header, char *replyto)
{
struct header head;
head.h_to = to;
head.h_subject = subject;
head.h_header = header;
head.h_cc = cc;
head.h_bcc = bcc;
head.h_replyto = replyto;
head.h_inreplyto = NULL;
head.h_smopts = smopts;
mail1(&head, 0);
return(0);
}
/*
* Send mail to a bunch of user names. The interface is through
* the mail routine below.
*/
int
sendmail(void *v)
{
char *str = v;
struct header head;
head.h_to = extract(str, GTO);
head.h_subject = NULL;
head.h_header = NULL;
head.h_cc = NULL;
head.h_bcc = NULL;
head.h_replyto = value("REPLYTO");
head.h_inreplyto = NULL;
head.h_smopts = NULL;
mail1(&head, 0);
return(0);
}
/*
* Mail a message on standard input to the people indicated
* in the passed header. (Internal interface).
*/
void
mail1(struct header *hp, int printheaders)
{
char *cp;
pid_t pid;
char **namelist;
struct name *to;
FILE *mtf;
int w;
sigset_t parent_nset, parent_oset;
/*
* Collect user's mail from standard input.
* Get the result as mtf.
*/
if ((mtf = collect(hp, printheaders)) == NULL)
return;
if (fsize(mtf) == 0) {
if (value("skipempty") != NULL)
goto out;
if (hp->h_subject == NULL || *hp->h_subject == '\0')
puts("No message, no subject; hope that's ok");
else
puts("Null message body; hope that's ok");
}
/*
* Now, take the user names from the combined
* to and cc lists and do all the alias
* processing.
*/
senderr = 0;
to = usermap(cat(hp->h_bcc, cat(hp->h_to, hp->h_cc)));
if (to == NULL) {
puts("No recipients specified");
senderr++;
}
/*
* Look through the recipient list for names with /'s
* in them which we write to as files directly.
*/
to = outof(to, mtf, hp);
if (senderr)
savedeadletter(mtf);
to = elide(to);
if (count(to) == 0)
goto out;
fixhead(hp, to);
if ((mtf = infix(hp, mtf)) == NULL) {
fputs(". . . message lost, sorry.\n", stderr);
return;
}
namelist = unpack(hp->h_smopts, to);
if (debug) {
char **t;
fputs("Sendmail arguments:", stdout);
for (t = namelist; *t != NULL; t++)
printf(" \"%s\"", *t);
putchar('\n');
goto out;
}
if ((cp = value("record")) != NULL)
(void)savemail(expand(cp), mtf);
/*
* Block the SIGCHLD signal temporarily, until we fork() a child and add its PID to the struct child "child" list.
* See: Bug#550116
*/
sigemptyset(&parent_nset);
sigaddset(&parent_nset, SIGCHLD);
sigprocmask(SIG_BLOCK, &parent_nset, &parent_oset);
/*
* Fork, set up the temporary mail file as standard
* input for "mail", and exec with the user list we generated
* far above.
*/
pid = fork();
if (pid == -1) {
warn("fork");
savedeadletter(mtf);
goto out;
}
if (pid == 0) {
sigset_t nset;
/*
* Restore the original signal mask which we altered in the parent, just in case.
* See: Bug#550116
*/
sigprocmask(SIG_SETMASK, &parent_oset, NULL);
sigemptyset(&nset);
sigaddset(&nset, SIGHUP);
sigaddset(&nset, SIGINT);
sigaddset(&nset, SIGQUIT);
sigaddset(&nset, SIGTSTP);
sigaddset(&nset, SIGTTIN);
sigaddset(&nset, SIGTTOU);
prepare_child(&nset, fileno(mtf), -1);
if ((cp = value("sendmail")) != NULL)
cp = expand(cp);
else
cp = _PATH_SENDMAIL;
execv(cp, namelist);
warn("%s", cp);
_exit(1);
}
/*
* Add the PID to the struct child "child" list or else the sigchild() handler may reap the child
* before we manage to reap it in wait_child().
* Then restore the original signal mask.
* See: Bug#550116
*/
if (add_child(pid)) {
fprintf(stderr, "findchild() failed"); // this should never happen
}
sigprocmask(SIG_SETMASK, &parent_oset, NULL);
#ifndef DEBIAN
if (value("verbose") != NULL)
(void)wait_child(pid);
else
free_child(pid);
#else
/*
* Always wait for sendmail and check its error code.
* See: Bug#145379
*/
if ((w = wait_child(pid))) {
fprintf(stderr, "Can't send mail: sendmail process failed");
if (w > 0)
fprintf(stderr, " with error code %d", w);
fprintf(stderr, "\n");
savedeadletter(mtf);
}
#endif
out:
(void)Fclose(mtf);
}
/*
* Fix the header by glopping all of the expanded names from
* the distribution list into the appropriate fields.
*/
void
fixhead(struct header *hp, struct name *tolist)
{
struct name *np;
hp->h_to = NULL;
hp->h_cc = NULL;
hp->h_bcc = NULL;
for (np = tolist; np != NULL; np = np->n_flink)
if ((np->n_type & GMASK) == GTO)
hp->h_to =
cat(hp->h_to, nalloc(np->n_name, np->n_type));
else if ((np->n_type & GMASK) == GCC)
hp->h_cc =
cat(hp->h_cc, nalloc(np->n_name, np->n_type));
else if ((np->n_type & GMASK) == GBCC)
hp->h_bcc =
cat(hp->h_bcc, nalloc(np->n_name, np->n_type));
}
/*
* Prepend a header in front of the collected stuff
* and return the new file.
*/
FILE *
infix(struct header *hp, FILE *fi)
{
FILE *nfo, *nfi;
int c, fd;
char tempname[PATHSIZE];
(void)snprintf(tempname, sizeof(tempname),
"%s/mail.RsXXXXXXXXXX", tmpdir);
if ((fd = mkstemp(tempname)) == -1 ||
(nfo = Fdopen(fd, "w")) == NULL) {
warn("%s", tempname);
return(fi);
}
if ((nfi = Fopen(tempname, "r")) == NULL) {
warn("%s", tempname);
(void)Fclose(nfo);
(void)rm(tempname);
return(fi);
}
(void)rm(tempname);
(void)puthead(hp, nfo,
GTO|GSUBJECT|GCC|GBCC|GREPLYTO|GINREPLYTO|GNL|GCOMMA);
c = getc(fi);
while (c != EOF) {
(void)putc(c, nfo);
c = getc(fi);
}
if (ferror(fi)) {
warn("read");
rewind(fi);
return(fi);
}
(void)fflush(nfo);
if (ferror(nfo)) {
warn("%s", tempname);
(void)Fclose(nfo);
(void)Fclose(nfi);
rewind(fi);
return(fi);
}
(void)Fclose(nfo);
(void)Fclose(fi);
rewind(nfi);
return(nfi);
}
/*
* Dump the to, subject, cc header on the
* passed file buffer.
*/
int
puthead(struct header *hp, FILE *fo, int w)
{
int gotcha;
gotcha = 0;
if (hp->h_to != NULL && w & GTO)
fmt("To:", hp->h_to, fo, w&GCOMMA), gotcha++;
if (hp->h_subject != NULL && w & GSUBJECT)
fprintf(fo, "Subject: %s\n", hp->h_subject), gotcha++;
if (hp->h_cc != NULL && w & GCC)
fmt("Cc:", hp->h_cc, fo, w&GCOMMA), gotcha++;
/* Should not put bcc into mails (Closes: Bug#75232)
if (hp->h_bcc != NULL && w & GBCC)
fmt("Bcc:", hp->h_bcc, fo, w&GCOMMA), gotcha++;
*/
if (hp->h_header != NULL && w)
fprintf(fo, "%s\n", hp->h_header), gotcha++;
if (hp->h_replyto != NULL && w & GREPLYTO)
fprintf(fo, "Reply-To: %s\n", hp->h_replyto), gotcha++;
if (hp->h_inreplyto != NULL && w & GINREPLYTO)
fprintf(fo, "In-Reply-To: <%s>\n", hp->h_inreplyto), gotcha++;
if (gotcha && w & GNL)
(void)putc('\n', fo);
return(0);
}
/*
* Format the given header line to not exceed 72 characters.
*/
void
fmt(char *str, struct name *np, FILE *fo, int comma)
{
int col, len;
comma = comma ? 1 : 0;
col = strlen(str);
if (col)
fputs(str, fo);
for (; np != NULL; np = np->n_flink) {
if (np->n_flink == NULL)
comma = 0;
len = strlen(np->n_name);
col++; /* for the space */
if (col + len + comma > 72 && col > 4) {
fputs("\n ", fo);
col = 4;
} else
putc(' ', fo);
fputs(np->n_name, fo);
if (comma)
putc(',', fo);
col += len + comma;
}
putc('\n', fo);
}
/*
* Save the outgoing mail on the passed file.
*/
/*ARGSUSED*/
int
savemail(char *name, FILE *fi)
{
FILE *fo;
char buf[BUFSIZ];
time_t now;
mode_t m;
m = umask(077);
fo = Fopen(name, "a");
(void)umask(m);
if (fo == NULL) {
warn("%s", name);
return(-1);
}
(void)time(&now);
fprintf(fo, "From %s %s", myname, ctime(&now));
while (fgets(buf, sizeof(buf), fi) == buf) {
/*
* We can't read the record file (or inbox for recipient)
* in the message body (from forwarded messages or sentences
* starting with "From "), so we will prepend those lines with
* a '>'.
*/
if (strncmp(buf, "From ", 5) == 0)
(void)fwrite(">", 1, 1, fo); /* '>' before 'From ' */
(void)fwrite(buf, 1, strlen(buf), fo);
}
(void)putc('\n', fo);
(void)fflush(fo);
if (ferror(fo))
warn("%s", name);
(void)Fclose(fo);
rewind(fi);
return(0);
}
/*ARGSUSED*/
void
sendint(int s)
{
sendsignal = s;
}
|