1 /*
2 * Copyright (c) 1998-2003 Proofpoint, Inc. and its suppliers.
3 * All rights reserved.
4 * Copyright (c) 1983, 1995-1997 Eric P. Allman. All rights reserved.
5 * Copyright (c) 1988, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * By using this file, you agree to the terms and conditions set
9 * forth in the LICENSE file which can be found at the top level of
10 * the sendmail distribution.
11 *
12 */
13
14 #include <sendmail.h>
15
16 SM_RCSID("@(#)$Id: alias.c,v 8.221 2013-11-22 20:51:54 ca Exp $")
17
18 #include <sm/sendmail.h>
19
20 #define SEPARATOR ':'
21 # define ALIAS_SPEC_SEPARATORS " ,/:"
22
23 static MAP *AliasFileMap = NULL; /* the actual aliases.files map */
24 static int NAliasFileMaps; /* the number of entries in AliasFileMap */
25
26 static char *aliaslookup __P((char *, int *, char *));
27
28 /*
29 ** ALIAS -- Compute aliases.
30 **
31 ** Scans the alias file for an alias for the given address.
32 ** If found, it arranges to deliver to the alias list instead.
33 ** Uses libdbm database if -DDBM.
34 **
35 ** Parameters:
36 ** a -- address to alias.
37 ** sendq -- a pointer to the head of the send queue
38 ** to put the aliases in.
39 ** aliaslevel -- the current alias nesting depth.
40 ** e -- the current envelope.
41 **
42 ** Returns:
43 ** none
44 **
45 ** Side Effects:
46 ** Aliases found are expanded.
47 **
48 ** Deficiencies:
49 ** It should complain about names that are aliased to
50 ** nothing.
51 */
52
53 void
alias(a,sendq,aliaslevel,e)54 alias(a, sendq, aliaslevel, e)
55 register ADDRESS *a;
56 ADDRESS **sendq;
57 int aliaslevel;
58 register ENVELOPE *e;
59 {
60 register char *p;
61 char *owner;
62 auto int status = EX_OK;
63 char obuf[MAXNAME_I + 7];
64
65 if (tTd(27, 1))
66 sm_dprintf("alias(%s)\n", a->q_user);
67
68 /* don't realias already aliased names */
69 if (!QS_IS_OK(a->q_state))
70 return;
71
72 if (NoAlias)
73 return;
74
75 e->e_to = a->q_paddr;
76
77 /*
78 ** Look up this name.
79 **
80 ** If the map was unavailable, we will queue this message
81 ** until the map becomes available; otherwise, we could
82 ** bounce messages inappropriately.
83 */
84
85 #if _FFR_REDIRECTEMPTY
86 /*
87 ** envelope <> can't be sent to mailing lists, only owner-
88 ** send spam of this type to owner- of the list
89 ** ---- to stop spam from going to mailing lists!
90 */
91
92 if (e->e_sender != NULL && *e->e_sender == '\0')
93 {
94 /* Look for owner of alias */
95 (void) sm_strlcpyn(obuf, sizeof(obuf), 2, "owner-", a->q_user);
96 if (aliaslookup(obuf, &status, a->q_host) != NULL)
97 {
98 if (LogLevel > 8)
99 sm_syslog(LOG_WARNING, e->e_id,
100 "possible spam from <> to list: %s, redirected to %s\n",
101 a->q_user, obuf);
102 a->q_user = sm_rpool_strdup_x(e->e_rpool, obuf);
103 }
104 }
105 #endif /* _FFR_REDIRECTEMPTY */
106
107 p = aliaslookup(a->q_user, &status, a->q_host);
108 if (status == EX_TEMPFAIL || status == EX_UNAVAILABLE)
109 {
110 a->q_state = QS_QUEUEUP;
111 if (e->e_message == NULL)
112 e->e_message = sm_rpool_strdup_x(e->e_rpool,
113 "alias database unavailable");
114
115 /* XXX msg only per recipient? */
116 if (a->q_message == NULL)
117 a->q_message = "alias database unavailable";
118 return;
119 }
120 if (p == NULL)
121 return;
122
123 /*
124 ** Match on Alias.
125 ** Deliver to the target list.
126 */
127
128 if (tTd(27, 1))
129 sm_dprintf("%s (%s, %s) aliased to %s\n",
130 a->q_paddr, a->q_host, a->q_user, p);
131 if (bitset(EF_VRFYONLY, e->e_flags))
132 {
133 a->q_state = QS_VERIFIED;
134 return;
135 }
136 message("aliased to %s", shortenstring(p, MAXSHORTSTR));
137 if (LogLevel > 10)
138 sm_syslog(LOG_INFO, e->e_id,
139 "alias %.100s => %s",
140 a->q_paddr, shortenstring(p, MAXSHORTSTR));
141 a->q_flags &= ~QSELFREF;
142 if (tTd(27, 5))
143 {
144 sm_dprintf("alias: QS_EXPANDED ");
145 printaddr(sm_debug_file(), a, false);
146 }
147 a->q_state = QS_EXPANDED;
148
149 /*
150 ** Always deliver aliased items as the default user.
151 ** Setting q_gid to 0 forces deliver() to use DefUser
152 ** instead of the alias name for the call to initgroups().
153 */
154
155 a->q_uid = DefUid;
156 a->q_gid = 0;
157 a->q_fullname = NULL;
158 a->q_flags |= QGOODUID|QALIAS;
159
160 (void) sendtolist(p, a, sendq, aliaslevel + 1, e);
161
162 if (bitset(QSELFREF, a->q_flags) && QS_IS_EXPANDED(a->q_state))
163 a->q_state = QS_OK;
164
165 /*
166 ** Look for owner of alias
167 */
168
169 if (strncmp(a->q_user, "owner-", 6) == 0 ||
170 strlen(a->q_user) > sizeof(obuf) - 7)
171 (void) sm_strlcpy(obuf, "owner-owner", sizeof(obuf));
172 else
173 (void) sm_strlcpyn(obuf, sizeof(obuf), 2, "owner-", a->q_user);
174 owner = aliaslookup(obuf, &status, a->q_host);
175 if (owner == NULL)
176 return;
177
178 /* reflect owner into envelope sender */
179 if (strpbrk(owner, ",:/|\"") != NULL)
180 owner = obuf;
181 a->q_owner = sm_rpool_strdup_x(e->e_rpool, owner);
182
183 /* announce delivery to this alias; NORECEIPT bit set later */
184 if (e->e_xfp != NULL)
185 (void) sm_io_fprintf(e->e_xfp, SM_TIME_DEFAULT,
186 "Message delivered to mailing list %s\n",
187 a->q_paddr);
188 e->e_flags |= EF_SENDRECEIPT;
189 a->q_flags |= QDELIVERED|QEXPANDED;
190 }
191
192 /*
193 ** ALIASLOOKUP -- look up a name in the alias file.
194 **
195 ** Parameters:
196 ** name -- the name to look up [i]
197 ** pstat -- a pointer to a place to put the status.
198 ** av -- argument for %1 expansion.
199 **
200 ** Returns:
201 ** the value of name.
202 ** NULL if unknown.
203 **
204 ** Warnings:
205 ** The return value will be trashed across calls.
206 */
207
208 static char *
aliaslookup(name,pstat,av)209 aliaslookup(name, pstat, av)
210 char *name;
211 int *pstat;
212 char *av;
213 {
214 static MAP *map = NULL;
215 char *res;
216 #if _FFR_ALIAS_DETAIL
217 int i;
218 char *argv[4];
219 #else
220 # define argv NULL
221 #endif
222 #if _FFR_8BITENVADDR
223 char buf[MAXNAME]; /* EAI:ok */
224 #endif
225
226 if (map == NULL)
227 {
228 STAB *s = stab("aliases", ST_MAP, ST_FIND);
229
230 if (s == NULL)
231 return NULL;
232 map = &s->s_map;
233 }
234 DYNOPENMAP(map);
235
236 /* special case POstMastER -- always use lower case */
237 if (SM_STRCASEEQ(name, "postmaster"))
238 name = "postmaster";
239 #if _FFR_8BITENVADDR
240 (void) dequote_internal_chars(name, buf, sizeof(buf));
241 /* check length? */
242 name = buf;
243 #endif /* _FFR_8BITENVADDR */
244
245 #if _FFR_ALIAS_DETAIL
246 i = 0;
247 argv[i++] = name;
248 argv[i++] = av;
249
250 /* XXX '+' is hardwired here as delimiter! */
251 if (av != NULL && *av == '+')
252 argv[i++] = av + 1;
253 argv[i++] = NULL;
254 #endif /* _FFR_ALIAS_DETAIL */
255 res = (*map->map_class->map_lookup)(map, name, argv, pstat);
256 #if _FFR_8BITENVADDR
257 /* map_lookup() does a map_rewrite(), so no quoting here */
258 #endif
259 return res;
260 }
261
262 /*
263 ** SETALIAS -- set up an alias map
264 **
265 ** Called when reading configuration file.
266 **
267 ** Parameters:
268 ** spec -- the alias specification
269 **
270 ** Returns:
271 ** none.
272 */
273
274 void
setalias(spec)275 setalias(spec)
276 char *spec;
277 {
278 register char *p;
279 register MAP *map;
280 char *class;
281 STAB *s;
282
283 if (tTd(27, 8))
284 sm_dprintf("setalias(%s)\n", spec);
285
286 for (p = spec; p != NULL; )
287 {
288 char buf[50];
289
290 while (SM_ISSPACE(*p))
291 p++;
292 if (*p == '\0')
293 break;
294 spec = p;
295
296 if (NAliasFileMaps >= MAXMAPSTACK)
297 {
298 syserr("Too many alias databases defined, %d max",
299 MAXMAPSTACK);
300 return;
301 }
302 if (AliasFileMap == NULL)
303 {
304 (void) sm_strlcpy(buf, "aliases.files sequence",
305 sizeof(buf));
306 AliasFileMap = makemapentry(buf);
307 if (AliasFileMap == NULL)
308 {
309 syserr("setalias: cannot create aliases.files map");
310 return;
311 }
312 }
313 (void) sm_snprintf(buf, sizeof(buf), "Alias%d", NAliasFileMaps);
314 s = stab(buf, ST_MAP, ST_ENTER);
315 map = &s->s_map;
316 memset(map, '\0', sizeof(*map));
317 map->map_mname = s->s_name;
318 p = strpbrk(p, ALIAS_SPEC_SEPARATORS);
319 if (p != NULL && *p == SEPARATOR)
320 {
321 /* map name */
322 *p++ = '\0';
323 class = spec;
324 spec = p;
325 }
326 else
327 {
328 class = "implicit";
329 map->map_mflags = MF_INCLNULL;
330 }
331
332 /* find end of spec */
333 if (p != NULL)
334 {
335 bool quoted = false;
336
337 for (; *p != '\0'; p++)
338 {
339 /*
340 ** Don't break into a quoted string.
341 ** Needed for ldap maps which use
342 ** commas in their specifications.
343 */
344
345 if (*p == '"')
346 quoted = !quoted;
347 else if (*p == ',' && !quoted)
348 break;
349 }
350
351 /* No more alias specifications follow */
352 if (*p == '\0')
353 p = NULL;
354 }
355 if (p != NULL)
356 *p++ = '\0';
357
358 if (tTd(27, 20))
359 sm_dprintf(" map %s:%s %s\n", class, s->s_name, spec);
360
361 /* look up class */
362 s = stab(class, ST_MAPCLASS, ST_FIND);
363 if (s == NULL)
364 {
365 syserr("setalias: unknown alias class %s", class);
366 }
367 else if (!bitset(MCF_ALIASOK, s->s_mapclass.map_cflags))
368 {
369 syserr("setalias: map class %s can't handle aliases",
370 class);
371 }
372 else
373 {
374 map->map_class = &s->s_mapclass;
375 map->map_mflags |= MF_ALIAS;
376 if (map->map_class->map_parse(map, spec))
377 {
378 map->map_mflags |= MF_VALID;
379 AliasFileMap->map_stack[NAliasFileMaps++] = map;
380 }
381 }
382 }
383 }
384
385 /*
386 ** ALIASWAIT -- wait for distinguished @:@ token to appear.
387 **
388 ** This can decide to reopen the alias file
389 **
390 ** Parameters:
391 ** map -- a pointer to the map descriptor for this alias file.
392 ** ext -- the filename extension (e.g., ".db") for the
393 ** database file.
394 ** isopen -- if set, the database is already open, and we
395 ** should check for validity; otherwise, we are
396 ** just checking to see if it should be created.
397 **
398 ** Returns:
399 ** true -- if the database is open when we return.
400 ** false -- if the database is closed when we return.
401 */
402
403 bool
aliaswait(map,ext,isopen)404 aliaswait(map, ext, isopen)
405 MAP *map;
406 const char *ext;
407 bool isopen;
408 {
409 bool attimeout = false;
410 time_t mtime;
411 struct stat stb;
412 char buf[MAXPATHLEN];
413
414 if (tTd(27, 3))
415 sm_dprintf("aliaswait(%s:%s), open=%d, wait=%d\n",
416 map->map_class->map_cname, map->map_file,
417 isopen, bitset(MF_ALIASWAIT, map->map_mflags));
418 if (bitset(MF_ALIASWAIT, map->map_mflags))
419 return isopen;
420 map->map_mflags |= MF_ALIASWAIT;
421
422 if (isopen && SafeAlias > 0)
423 {
424 auto int st;
425 unsigned int sleeptime = 2;
426 unsigned int loopcount = 0; /* only used for debugging */
427 time_t toolong = curtime() + SafeAlias;
428
429 while (isopen &&
430 map->map_class->map_lookup(map, "@", NULL, &st) == NULL)
431 {
432 if (curtime() > toolong)
433 {
434 /* we timed out */
435 attimeout = true;
436 break;
437 }
438
439 /*
440 ** Close and re-open the alias database in case
441 ** the one is mv'ed instead of cp'ed in.
442 */
443
444 if (tTd(27, 2))
445 {
446 loopcount++;
447 sm_dprintf("aliaswait: sleeping for %u seconds (loopcount = %u)\n",
448 sleeptime, loopcount);
449 }
450
451 map->map_mflags |= MF_CLOSING;
452 map->map_class->map_close(map);
453 map->map_mflags &= ~(MF_OPEN|MF_WRITABLE|MF_CLOSING|MF_CHKED_CHGD);
454 (void) sleep(sleeptime);
455 sleeptime *= 2;
456 if (sleeptime > 60)
457 sleeptime = 60;
458 isopen = map->map_class->map_open(map, O_RDONLY);
459 }
460 }
461 map->map_mflags &= ~MF_CHKED_CHGD;
462
463 /* see if we need to go into auto-rebuild mode */
464 if (!bitset(MCF_REBUILDABLE, map->map_class->map_cflags))
465 {
466 if (tTd(27, 3))
467 sm_dprintf("aliaswait: not rebuildable\n");
468 map->map_mflags &= ~MF_ALIASWAIT;
469 return isopen;
470 }
471 if (stat(map->map_file, &stb) < 0)
472 {
473 if (tTd(27, 3))
474 sm_dprintf("aliaswait: no source file\n");
475 map->map_mflags &= ~MF_ALIASWAIT;
476 return isopen;
477 }
478 mtime = stb.st_mtime;
479 if (sm_strlcpyn(buf, sizeof(buf), 2,
480 map->map_file, ext == NULL ? "" : ext) >= sizeof(buf))
481 {
482 if (LogLevel > 3)
483 sm_syslog(LOG_INFO, NOQID,
484 "alias database %s%s name too long",
485 map->map_file, ext == NULL ? "" : ext);
486 message("alias database %s%s name too long",
487 map->map_file, ext == NULL ? "" : ext);
488 }
489
490 if (stat(buf, &stb) < 0 || stb.st_mtime < mtime || attimeout)
491 {
492 if (LogLevel > 3)
493 sm_syslog(LOG_INFO, NOQID,
494 "alias database %s out of date", buf);
495 message("Warning: alias database %s out of date", buf);
496 }
497 map->map_mflags &= ~MF_ALIASWAIT;
498 return isopen;
499 }
500 /*
501 ** REBUILDALIASES -- rebuild the alias database.
502 **
503 ** Parameters:
504 ** map -- the database to rebuild.
505 **
506 ** Returns:
507 ** true if successful; false otherwise.
508 **
509 ** Side Effects:
510 ** Reads the text version of the database, builds the map.
511 */
512
513 bool
rebuildaliases(map)514 rebuildaliases(map)
515 register MAP *map;
516 {
517 SM_FILE_T *af;
518 bool nolock = false;
519 bool success = false;
520 long sff = SFF_OPENASROOT|SFF_REGONLY|SFF_NOLOCK;
521 sigfunc_t oldsigint, oldsigquit;
522 #ifdef SIGTSTP
523 sigfunc_t oldsigtstp;
524 #endif
525
526 if (!bitset(MCF_REBUILDABLE, map->map_class->map_cflags))
527 return false;
528
529 if (!bitnset(DBS_LINKEDALIASFILEINWRITABLEDIR, DontBlameSendmail))
530 sff |= SFF_NOWLINK;
531 if (!bitnset(DBS_GROUPWRITABLEALIASFILE, DontBlameSendmail))
532 sff |= SFF_NOGWFILES;
533 if (!bitnset(DBS_WORLDWRITABLEALIASFILE, DontBlameSendmail))
534 sff |= SFF_NOWWFILES;
535
536 /* try to lock the source file */
537 if ((af = safefopen(map->map_file, O_RDWR, 0, sff)) == NULL)
538 {
539 struct stat stb;
540
541 if ((errno != EACCES && errno != EROFS) ||
542 (af = safefopen(map->map_file, O_RDONLY, 0, sff)) == NULL)
543 {
544 int saveerr = errno;
545
546 if (tTd(27, 1))
547 sm_dprintf("Can't open %s: %s\n",
548 map->map_file, sm_errstring(saveerr));
549 if (!bitset(MF_OPTIONAL, map->map_mflags))
550 message("newaliases: cannot open %s: %s",
551 map->map_file, sm_errstring(saveerr));
552 errno = 0;
553 return false;
554 }
555 nolock = true;
556 if (tTd(27, 1) ||
557 fstat(sm_io_getinfo(af, SM_IO_WHAT_FD, NULL), &stb) < 0 ||
558 bitset(S_IWUSR|S_IWGRP|S_IWOTH, stb.st_mode))
559 message("warning: cannot lock %s: %s",
560 map->map_file, sm_errstring(errno));
561 }
562
563 /* see if someone else is rebuilding the alias file */
564 if (!nolock &&
565 !lockfile(sm_io_getinfo(af, SM_IO_WHAT_FD, NULL), map->map_file,
566 NULL, LOCK_EX|LOCK_NB))
567 {
568 /* yes, they are -- wait until done */
569 message("Alias file %s is locked (maybe being rebuilt)",
570 map->map_file);
571 if (OpMode != MD_INITALIAS)
572 {
573 /* wait for other rebuild to complete */
574 (void) lockfile(sm_io_getinfo(af, SM_IO_WHAT_FD, NULL),
575 map->map_file, NULL, LOCK_EX);
576 }
577 (void) sm_io_close(af, SM_TIME_DEFAULT);
578 errno = 0;
579 return false;
580 }
581
582 oldsigint = sm_signal(SIGINT, SIG_IGN);
583 oldsigquit = sm_signal(SIGQUIT, SIG_IGN);
584 #ifdef SIGTSTP
585 oldsigtstp = sm_signal(SIGTSTP, SIG_IGN);
586 #endif
587
588 if (map->map_class->map_open(map, O_RDWR))
589 {
590 if (LogLevel > 7)
591 {
592 sm_syslog(LOG_NOTICE, NOQID,
593 "alias database %s rebuilt by %s",
594 map->map_file, username());
595 }
596 map->map_mflags |= MF_OPEN|MF_WRITABLE;
597 map->map_pid = CurrentPid;
598 readaliases(map, af, true, true);
599 success = true;
600 }
601 else
602 {
603 if (tTd(27, 1))
604 sm_dprintf("Can't create database for %s: %s\n",
605 map->map_file, sm_errstring(errno));
606 syserr("Cannot create database for alias file %s",
607 map->map_file);
608 }
609
610 /* close the file, thus releasing locks */
611 (void) sm_io_close(af, SM_TIME_DEFAULT);
612
613 /* add distinguished entries and close the database */
614 if (bitset(MF_OPEN, map->map_mflags))
615 {
616 #if _FFR_TESTS
617 if (tTd(78, 101))
618 {
619 int sl;
620
621 sl = tTdlevel(78) - 100;
622 sm_dprintf("rebuildaliases: sleep=%d, file=%s\n",
623 sl, map->map_file);
624 sleep(sl);
625 sm_dprintf("rebuildaliases: done\n");
626 }
627 #endif
628 map->map_mflags |= MF_CLOSING;
629 map->map_class->map_close(map);
630 map->map_mflags &= ~(MF_OPEN|MF_WRITABLE|MF_CLOSING);
631 }
632
633 /* restore the old signals */
634 (void) sm_signal(SIGINT, oldsigint);
635 (void) sm_signal(SIGQUIT, oldsigquit);
636 #ifdef SIGTSTP
637 (void) sm_signal(SIGTSTP, oldsigtstp);
638 #endif
639 return success;
640 }
641
642 /*
643 ** CONTLINE -- handle potential continuation line
644 **
645 ** Parameters:
646 ** fp -- file to read
647 ** line -- current line
648 **
649 ** Returns:
650 ** pointer to end of current line if there is a continuation line
651 ** NULL otherwise
652 **
653 ** Side Effects:
654 ** Modifies line if it is a continuation line
655 */
656
657 static char *contline __P((SM_FILE_T *, char *));
658 static char *
contline(fp,line)659 contline(fp, line)
660 SM_FILE_T *fp;
661 char *line;
662 {
663 char *p;
664 int c;
665
666 if ((p = strchr(line, '\n')) != NULL && p > line && p[-1] == '\\')
667 {
668 *p = '\0';
669 *--p = '\0';
670 return p;
671 }
672
673 c = sm_io_getc(fp, SM_TIME_DEFAULT);
674 if (!sm_io_eof(fp))
675 (void) sm_io_ungetc(fp, SM_TIME_DEFAULT, c);
676 if (c == ' ' || c == '\t')
677 {
678 char *nlp;
679
680 p = line;
681 nlp = &p[strlen(p)];
682 if (nlp > p && nlp[-1] == '\n')
683 *--nlp = '\0';
684 return nlp;
685 }
686 return NULL;
687 }
688
689 /*
690 ** READALIASES -- read and process the alias file.
691 **
692 ** This routine implements the part of initaliases that occurs
693 ** when we are not going to use the DBM stuff.
694 **
695 ** Parameters:
696 ** map -- the alias database descriptor.
697 ** af -- file to read the aliases from.
698 ** announcestats -- announce statistics regarding number of
699 ** aliases, longest alias, etc.
700 ** logstats -- lot the same info.
701 **
702 ** Returns:
703 ** none.
704 **
705 ** Side Effects:
706 ** Reads aliasfile into the symbol table.
707 ** Optionally, builds the .dir & .pag files.
708 */
709
710 void
readaliases(map,af,announcestats,logstats)711 readaliases(map, af, announcestats, logstats)
712 register MAP *map;
713 SM_FILE_T *af;
714 bool announcestats;
715 bool logstats;
716 {
717 register char *p;
718 char *rhs;
719 bool skipping;
720 long naliases, bytes, longest;
721 ADDRESS al, bl;
722 char lbuf[BUFSIZ];
723 char *line;
724 #if _FFR_8BITENVADDR
725 char lhsbuf[MAXNAME]; /* EAI:ok */
726 char rhsbuf[BUFSIZ];
727 int len;
728 #endif
729
730 /*
731 ** Read and interpret lines
732 */
733
734 FileName = map->map_file;
735 LineNumber = 0;
736 naliases = bytes = longest = 0;
737 skipping = false;
738 line = NULL;
739
740 while (sm_io_fgets(af, SM_TIME_DEFAULT, lbuf, sizeof(lbuf)) >= 0)
741 {
742 int lhssize, rhssize;
743 int c;
744 char *newp;
745
746 LineNumber++;
747
748 /* XXX what if line="a\\" ? */
749 line = lbuf;
750 p = line;
751 while ((newp = contline(af, line)) != NULL)
752 {
753 p = newp;
754 if ((c = sm_io_fgets(af, SM_TIME_DEFAULT, p,
755 SPACELEFT(lbuf, p))) < 0)
756 {
757 break;
758 }
759 LineNumber++;
760 }
761 #if _FFR_8BITENVADDR
762 if (SMTP_UTF8 || EightBitAddrOK)
763 {
764 if (line != lbuf)
765 SM_FREE(line);
766 line = quote_internal_chars(lbuf, NULL, &len, NULL);
767 }
768 else
769 #endif
770 /* "else" in #if code above */
771 line = lbuf;
772
773 p = strchr(line, '\n');
774 if (p != NULL)
775 *p = '\0';
776 else if (!sm_io_eof(af))
777 {
778 int prev;
779 bool cl;
780
781 errno = 0;
782 syserr("554 5.3.0 alias line too long");
783
784 prev = '\0';
785 cl = false;
786
787 do {
788 /* flush to end of "virtual" line */
789 while ((c = sm_io_getc(af, SM_TIME_DEFAULT)) !=
790 SM_IO_EOF && c != '\n')
791 {
792 prev = c;
793 }
794 cl = ('\\' == prev && '\n' == c);
795 if (!cl)
796 {
797 c = sm_io_getc(af, SM_TIME_DEFAULT);
798 if (!sm_io_eof(af))
799 (void) sm_io_ungetc(af, SM_TIME_DEFAULT, c);
800 cl = (c == ' ' || c == '\t');
801 }
802 } while (cl);
803
804 continue;
805 }
806
807 switch (line[0])
808 {
809 case '#':
810 case '\0':
811 skipping = false;
812 continue;
813
814 case ' ':
815 case '\t':
816 if (!skipping)
817 syserr("554 5.3.5 Non-continuation line starts with space");
818 skipping = true;
819 continue;
820 }
821 skipping = false;
822
823 /*
824 ** Process the LHS
825 ** Find the colon separator, and parse the address.
826 ** It should resolve to a local name -- this will
827 ** be checked later (we want to optionally do
828 ** parsing of the RHS first to maximize error
829 ** detection).
830 */
831
832 for (p = line; *p != '\0' && *p != ':' && *p != '\n'; p++)
833 continue;
834 if (*p++ != ':')
835 {
836 syserr("554 5.3.5 missing colon");
837 continue;
838 }
839 /* XXX line must be [i] */
840 if (parseaddr(line, &al, RF_COPYALL, ':', NULL, CurEnv, true)
841 == NULL)
842 {
843 syserr("554 5.3.5 %.40s... illegal alias name", line);
844 continue;
845 }
846
847 /*
848 ** Process the RHS.
849 ** 'al' is the internal form of the LHS address.
850 ** 'p' points to the text of the RHS.
851 */
852
853 while (SM_ISSPACE(*p))
854 p++;
855 rhs = p;
856 {
857 register char *nlp;
858
859 nlp = &p[strlen(p)];
860 if (nlp > p && nlp[-1] == '\n')
861 *--nlp = '\0';
862
863 if (CheckAliases)
864 {
865 /* do parsing & compression of addresses */
866 while (*p != '\0')
867 {
868 auto char *delimptr;
869
870 while ((SM_ISSPACE(*p)) || *p == ',')
871 p++;
872 if (*p == '\0')
873 break;
874 /* XXX p must be [i] */
875 if (parseaddr(p, &bl, RF_COPYNONE, ',',
876 &delimptr, CurEnv, true)
877 == NULL)
878 usrerr("553 5.3.5 %s... bad address", p);
879 p = delimptr;
880 }
881 }
882 else
883 {
884 p = nlp;
885 }
886 } while (0);
887
888 if (skipping)
889 continue;
890
891 if (!bitnset(M_ALIASABLE, al.q_mailer->m_flags))
892 {
893 syserr("554 5.3.5 %s... cannot alias non-local names",
894 al.q_paddr);
895 continue;
896 }
897
898 /*
899 ** Insert alias into symbol table or database file.
900 **
901 ** Special case pOStmaStER -- always make it lower case.
902 */
903
904 if (SM_STRCASEEQ(al.q_user, "postmaster"))
905 makelower_a(&al.q_user, CurEnv->e_rpool);
906
907 lhssize = strlen(al.q_user);
908 rhssize = strlen(rhs);
909 if (rhssize > 0)
910 {
911 /* is RHS empty (just spaces)? */
912 p = rhs;
913 while (SM_ISSPACE(*p))
914 p++;
915 }
916 if (rhssize == 0 || *p == '\0')
917 {
918 syserr("554 5.3.5 %.40s... missing value for alias",
919 line);
920 }
921 else
922 {
923 #if _FFR_8BITENVADDR
924 if (SMTP_UTF8 || EightBitAddrOK)
925 {
926 dequote_internal_chars(al.q_user, lhsbuf, sizeof(lhsbuf));
927 dequote_internal_chars(rhs, rhsbuf, sizeof(rhsbuf));
928 map->map_class->map_store(map, lhsbuf, rhsbuf);
929 }
930 else
931 #endif
932 /* "else" in #if code above */
933 map->map_class->map_store(map, al.q_user, rhs);
934
935 /* statistics */
936 naliases++;
937 bytes += lhssize + rhssize;
938 if (rhssize > longest)
939 longest = rhssize;
940 }
941 }
942
943 CurEnv->e_to = NULL;
944 FileName = NULL;
945 if (Verbose || announcestats)
946 message("%s: %ld aliases, longest %ld bytes, %ld bytes total",
947 map->map_file, naliases, longest, bytes);
948 if (LogLevel > 7 && logstats)
949 sm_syslog(LOG_INFO, NOQID,
950 "%s: %ld aliases, longest %ld bytes, %ld bytes total",
951 map->map_file, naliases, longest, bytes);
952 }
953 /*
954 ** FORWARD -- Try to forward mail
955 **
956 ** This is similar but not identical to aliasing.
957 **
958 ** Parameters:
959 ** user -- the name of the user who's mail we would like
960 ** to forward to. It must have been verified --
961 ** i.e., the q_home field must have been filled in.
962 ** sendq -- a pointer to the head of the send queue to
963 ** put this user's aliases in.
964 ** aliaslevel -- the current alias nesting depth.
965 ** e -- the current envelope.
966 **
967 ** Returns:
968 ** none.
969 **
970 ** Side Effects:
971 ** New names are added to send queues.
972 */
973
974 void
forward(user,sendq,aliaslevel,e)975 forward(user, sendq, aliaslevel, e)
976 ADDRESS *user;
977 ADDRESS **sendq;
978 int aliaslevel;
979 register ENVELOPE *e;
980 {
981 char *pp;
982 char *ep;
983 bool got_transient;
984
985 if (tTd(27, 1))
986 sm_dprintf("forward(%s)\n", user->q_paddr);
987
988 if (!bitnset(M_HASPWENT, user->q_mailer->m_flags) ||
989 !QS_IS_OK(user->q_state))
990 return;
991 if (ForwardPath != NULL && *ForwardPath == '\0')
992 return;
993 if (user->q_home == NULL)
994 {
995 syserr("554 5.3.0 forward: no home");
996 user->q_home = "/no/such/directory";
997 }
998
999 /* good address -- look for .forward file in home */
1000 macdefine(&e->e_macro, A_PERM, 'z', user->q_home);
1001 macdefine(&e->e_macro, A_PERM, 'u', user->q_user);
1002 pp = user->q_host;
1003 #if _FFR_8BITENVADDR
1004 if (NULL != pp)
1005 {
1006 int len;
1007
1008 pp = quote_internal_chars(pp, NULL, &len, NULL);
1009 }
1010 #endif
1011 macdefine(&e->e_macro, A_PERM, 'h', pp);
1012 if (ForwardPath == NULL)
1013 ForwardPath = newstr("\201z/.forward");
1014
1015 got_transient = false;
1016 for (pp = ForwardPath; pp != NULL; pp = ep)
1017 {
1018 int err;
1019 char buf[MAXPATHLEN];
1020 struct stat st;
1021
1022 ep = strchr(pp, SEPARATOR);
1023 if (ep != NULL)
1024 *ep = '\0';
1025 expand(pp, buf, sizeof(buf), e);
1026 if (ep != NULL)
1027 *ep++ = SEPARATOR;
1028 if (buf[0] == '\0')
1029 continue;
1030 if (tTd(27, 3))
1031 sm_dprintf("forward: trying %s\n", buf);
1032
1033 err = include(buf, true, user, sendq, aliaslevel, e);
1034 if (err == 0)
1035 break;
1036 else if (transienterror(err))
1037 {
1038 /* we may have to suspend this message */
1039 got_transient = true;
1040 if (tTd(27, 2))
1041 sm_dprintf("forward: transient error on %s\n",
1042 buf);
1043 if (LogLevel > 2)
1044 {
1045 char *curhost = CurHostName;
1046
1047 CurHostName = NULL;
1048 sm_syslog(LOG_ERR, e->e_id,
1049 "forward %s: transient error: %s",
1050 buf, sm_errstring(err));
1051 CurHostName = curhost;
1052 }
1053
1054 }
1055 else
1056 {
1057 switch (err)
1058 {
1059 case ENOENT:
1060 break;
1061
1062 case E_SM_WWDIR:
1063 case E_SM_GWDIR:
1064 /* check if it even exists */
1065 if (stat(buf, &st) < 0 && errno == ENOENT)
1066 {
1067 if (bitnset(DBS_DONTWARNFORWARDFILEINUNSAFEDIRPATH,
1068 DontBlameSendmail))
1069 break;
1070 }
1071 /* FALLTHROUGH */
1072
1073 #if _FFR_FORWARD_SYSERR
1074 case E_SM_NOSLINK:
1075 case E_SM_NOHLINK:
1076 case E_SM_REGONLY:
1077 case E_SM_ISEXEC:
1078 case E_SM_WWFILE:
1079 case E_SM_GWFILE:
1080 syserr("forward: %s: %s", buf, sm_errstring(err));
1081 break;
1082 #endif /* _FFR_FORWARD_SYSERR */
1083
1084 default:
1085 if (LogLevel > (RunAsUid == 0 ? 2 : 10))
1086 sm_syslog(LOG_WARNING, e->e_id,
1087 "forward %s: %s", buf,
1088 sm_errstring(err));
1089 if (Verbose)
1090 message("forward: %s: %s",
1091 buf, sm_errstring(err));
1092 break;
1093 }
1094 }
1095 }
1096 if (pp == NULL && got_transient)
1097 {
1098 /*
1099 ** There was no successful .forward open and at least one
1100 ** transient open. We have to defer this address for
1101 ** further delivery.
1102 */
1103
1104 message("transient .forward open error: message queued");
1105 user->q_state = QS_QUEUEUP;
1106 return;
1107 }
1108 }
1109