Add cmdline option to append a log message. Bug 418
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2014 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 #ifdef USE_GNUTLS
16 # include <gnutls/gnutls.h>
17 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
18 # define DISABLE_OCSP
19 # endif
20 #endif
21
22 extern void init_lookup_list(void);
23
24
25
26 /*************************************************
27 * Function interface to store functions *
28 *************************************************/
29
30 /* We need some real functions to pass to the PCRE regular expression library
31 for store allocation via Exim's store manager. The normal calls are actually
32 macros that pass over location information to make tracing easier. These
33 functions just interface to the standard macro calls. A good compiler will
34 optimize out the tail recursion and so not make them too expensive. There
35 are two sets of functions; one for use when we want to retain the compiled
36 regular expression for a long time; the other for short-term use. */
37
38 static void *
39 function_store_get(size_t size)
40 {
41 return store_get((int)size);
42 }
43
44 static void
45 function_dummy_free(void *block) { block = block; }
46
47 static void *
48 function_store_malloc(size_t size)
49 {
50 return store_malloc((int)size);
51 }
52
53 static void
54 function_store_free(void *block)
55 {
56 store_free(block);
57 }
58
59
60
61
62 /*************************************************
63 * Enums for cmdline interface *
64 *************************************************/
65
66 enum commandline_info { CMDINFO_NONE=0,
67 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
68
69
70
71
72 /*************************************************
73 * Compile regular expression and panic on fail *
74 *************************************************/
75
76 /* This function is called when failure to compile a regular expression leads
77 to a panic exit. In other cases, pcre_compile() is called directly. In many
78 cases where this function is used, the results of the compilation are to be
79 placed in long-lived store, so we temporarily reset the store management
80 functions that PCRE uses if the use_malloc flag is set.
81
82 Argument:
83 pattern the pattern to compile
84 caseless TRUE if caseless matching is required
85 use_malloc TRUE if compile into malloc store
86
87 Returns: pointer to the compiled pattern
88 */
89
90 const pcre *
91 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
92 {
93 int offset;
94 int options = PCRE_COPT;
95 const pcre *yield;
96 const uschar *error;
97 if (use_malloc)
98 {
99 pcre_malloc = function_store_malloc;
100 pcre_free = function_store_free;
101 }
102 if (caseless) options |= PCRE_CASELESS;
103 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
104 pcre_malloc = function_store_get;
105 pcre_free = function_dummy_free;
106 if (yield == NULL)
107 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
108 "%s at offset %d while compiling %s", error, offset, pattern);
109 return yield;
110 }
111
112
113
114
115 /*************************************************
116 * Execute regular expression and set strings *
117 *************************************************/
118
119 /* This function runs a regular expression match, and sets up the pointers to
120 the matched substrings.
121
122 Arguments:
123 re the compiled expression
124 subject the subject string
125 options additional PCRE options
126 setup if < 0 do full setup
127 if >= 0 setup from setup+1 onwards,
128 excluding the full matched string
129
130 Returns: TRUE or FALSE
131 */
132
133 BOOL
134 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
135 {
136 int ovector[3*(EXPAND_MAXN+1)];
137 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
138 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
139 BOOL yield = n >= 0;
140 if (n == 0) n = EXPAND_MAXN + 1;
141 if (yield)
142 {
143 int nn;
144 expand_nmax = (setup < 0)? 0 : setup + 1;
145 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
146 {
147 expand_nstring[expand_nmax] = subject + ovector[nn];
148 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
149 }
150 expand_nmax--;
151 }
152 return yield;
153 }
154
155
156
157
158 /*************************************************
159 * Set up processing details *
160 *************************************************/
161
162 /* Save a text string for dumping when SIGUSR1 is received.
163 Do checks for overruns.
164
165 Arguments: format and arguments, as for printf()
166 Returns: nothing
167 */
168
169 void
170 set_process_info(const char *format, ...)
171 {
172 int len;
173 va_list ap;
174 sprintf(CS process_info, "%5d ", (int)getpid());
175 len = Ustrlen(process_info);
176 va_start(ap, format);
177 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
178 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
179 len = Ustrlen(process_info);
180 process_info[len+0] = '\n';
181 process_info[len+1] = '\0';
182 process_info_len = len + 1;
183 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
184 va_end(ap);
185 }
186
187
188
189
190 /*************************************************
191 * Handler for SIGUSR1 *
192 *************************************************/
193
194 /* SIGUSR1 causes any exim process to write to the process log details of
195 what it is currently doing. It will only be used if the OS is capable of
196 setting up a handler that causes automatic restarting of any system call
197 that is in progress at the time.
198
199 This function takes care to be signal-safe.
200
201 Argument: the signal number (SIGUSR1)
202 Returns: nothing
203 */
204
205 static void
206 usr1_handler(int sig)
207 {
208 int fd;
209
210 os_restarting_signal(sig, usr1_handler);
211
212 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
213 if (fd < 0)
214 {
215 /* If we are already running as the Exim user, try to create it in the
216 current process (assuming spool_directory exists). Otherwise, if we are
217 root, do the creation in an exim:exim subprocess. */
218
219 int euid = geteuid();
220 if (euid == exim_uid)
221 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
222 else if (euid == root_uid)
223 fd = log_create_as_exim(process_log_path);
224 }
225
226 /* If we are neither exim nor root, or if we failed to create the log file,
227 give up. There is not much useful we can do with errors, since we don't want
228 to disrupt whatever is going on outside the signal handler. */
229
230 if (fd < 0) return;
231
232 {int dummy = write(fd, process_info, process_info_len); dummy = dummy; }
233 (void)close(fd);
234 }
235
236
237
238 /*************************************************
239 * Timeout handler *
240 *************************************************/
241
242 /* This handler is enabled most of the time that Exim is running. The handler
243 doesn't actually get used unless alarm() has been called to set a timer, to
244 place a time limit on a system call of some kind. When the handler is run, it
245 re-enables itself.
246
247 There are some other SIGALRM handlers that are used in special cases when more
248 than just a flag setting is required; for example, when reading a message's
249 input. These are normally set up in the code module that uses them, and the
250 SIGALRM handler is reset to this one afterwards.
251
252 Argument: the signal value (SIGALRM)
253 Returns: nothing
254 */
255
256 void
257 sigalrm_handler(int sig)
258 {
259 sig = sig; /* Keep picky compilers happy */
260 sigalrm_seen = TRUE;
261 os_non_restarting_signal(SIGALRM, sigalrm_handler);
262 }
263
264
265
266 /*************************************************
267 * Sleep for a fractional time interval *
268 *************************************************/
269
270 /* This function is called by millisleep() and exim_wait_tick() to wait for a
271 period of time that may include a fraction of a second. The coding is somewhat
272 tedious. We do not expect setitimer() ever to fail, but if it does, the process
273 will wait for ever, so we panic in this instance. (There was a case of this
274 when a bug in a function that calls milliwait() caused it to pass invalid data.
275 That's when I added the check. :-)
276
277 We assume it to be not worth sleeping for under 100us; this value will
278 require revisiting as hardware advances. This avoids the issue of
279 a zero-valued timer setting meaning "never fire".
280
281 Argument: an itimerval structure containing the interval
282 Returns: nothing
283 */
284
285 static void
286 milliwait(struct itimerval *itval)
287 {
288 sigset_t sigmask;
289 sigset_t old_sigmask;
290
291 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
292 return;
293 (void)sigemptyset(&sigmask); /* Empty mask */
294 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
295 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
296 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
297 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
298 "setitimer() failed: %s", strerror(errno));
299 (void)sigfillset(&sigmask); /* All signals */
300 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
301 (void)sigsuspend(&sigmask); /* Until SIGALRM */
302 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
303 }
304
305
306
307
308 /*************************************************
309 * Millisecond sleep function *
310 *************************************************/
311
312 /* The basic sleep() function has a granularity of 1 second, which is too rough
313 in some cases - for example, when using an increasing delay to slow down
314 spammers.
315
316 Argument: number of millseconds
317 Returns: nothing
318 */
319
320 void
321 millisleep(int msec)
322 {
323 struct itimerval itval;
324 itval.it_interval.tv_sec = 0;
325 itval.it_interval.tv_usec = 0;
326 itval.it_value.tv_sec = msec/1000;
327 itval.it_value.tv_usec = (msec % 1000) * 1000;
328 milliwait(&itval);
329 }
330
331
332
333 /*************************************************
334 * Compare microsecond times *
335 *************************************************/
336
337 /*
338 Arguments:
339 tv1 the first time
340 tv2 the second time
341
342 Returns: -1, 0, or +1
343 */
344
345 int
346 exim_tvcmp(struct timeval *t1, struct timeval *t2)
347 {
348 if (t1->tv_sec > t2->tv_sec) return +1;
349 if (t1->tv_sec < t2->tv_sec) return -1;
350 if (t1->tv_usec > t2->tv_usec) return +1;
351 if (t1->tv_usec < t2->tv_usec) return -1;
352 return 0;
353 }
354
355
356
357
358 /*************************************************
359 * Clock tick wait function *
360 *************************************************/
361
362 /* Exim uses a time + a pid to generate a unique identifier in two places: its
363 message IDs, and in file names for maildir deliveries. Because some OS now
364 re-use pids within the same second, sub-second times are now being used.
365 However, for absolute certaintly, we must ensure the clock has ticked before
366 allowing the relevant process to complete. At the time of implementation of
367 this code (February 2003), the speed of processors is such that the clock will
368 invariably have ticked already by the time a process has done its job. This
369 function prepares for the time when things are faster - and it also copes with
370 clocks that go backwards.
371
372 Arguments:
373 then_tv A timeval which was used to create uniqueness; its usec field
374 has been rounded down to the value of the resolution.
375 We want to be sure the current time is greater than this.
376 resolution The resolution that was used to divide the microseconds
377 (1 for maildir, larger for message ids)
378
379 Returns: nothing
380 */
381
382 void
383 exim_wait_tick(struct timeval *then_tv, int resolution)
384 {
385 struct timeval now_tv;
386 long int now_true_usec;
387
388 (void)gettimeofday(&now_tv, NULL);
389 now_true_usec = now_tv.tv_usec;
390 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
391
392 if (exim_tvcmp(&now_tv, then_tv) <= 0)
393 {
394 struct itimerval itval;
395 itval.it_interval.tv_sec = 0;
396 itval.it_interval.tv_usec = 0;
397 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
398 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
399
400 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
401 negative value for the microseconds is possible only in the case when "now"
402 is more than a second less than "then". That means that itval.it_value.tv_sec
403 is greater than zero. The following correction is therefore safe. */
404
405 if (itval.it_value.tv_usec < 0)
406 {
407 itval.it_value.tv_usec += 1000000;
408 itval.it_value.tv_sec -= 1;
409 }
410
411 DEBUG(D_transport|D_receive)
412 {
413 if (!running_in_test_harness)
414 {
415 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
416 then_tv->tv_sec, (long) then_tv->tv_usec,
417 now_tv.tv_sec, (long) now_tv.tv_usec);
418 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
419 (long) itval.it_value.tv_usec);
420 }
421 }
422
423 milliwait(&itval);
424 }
425 }
426
427
428
429
430 /*************************************************
431 * Call fopen() with umask 777 and adjust mode *
432 *************************************************/
433
434 /* Exim runs with umask(0) so that files created with open() have the mode that
435 is specified in the open() call. However, there are some files, typically in
436 the spool directory, that are created with fopen(). They end up world-writeable
437 if no precautions are taken. Although the spool directory is not accessible to
438 the world, this is an untidiness. So this is a wrapper function for fopen()
439 that sorts out the mode of the created file.
440
441 Arguments:
442 filename the file name
443 options the fopen() options
444 mode the required mode
445
446 Returns: the fopened FILE or NULL
447 */
448
449 FILE *
450 modefopen(const uschar *filename, const char *options, mode_t mode)
451 {
452 mode_t saved_umask = umask(0777);
453 FILE *f = Ufopen(filename, options);
454 (void)umask(saved_umask);
455 if (f != NULL) (void)fchmod(fileno(f), mode);
456 return f;
457 }
458
459
460
461
462 /*************************************************
463 * Ensure stdin, stdout, and stderr exist *
464 *************************************************/
465
466 /* Some operating systems grumble if an exec() happens without a standard
467 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
468 file will be opened and will use these fd values, and then some other bit of
469 code will assume, for example, that it can write error messages to stderr.
470 This function ensures that fds 0, 1, and 2 are open if they do not already
471 exist, by connecting them to /dev/null.
472
473 This function is also used to ensure that std{in,out,err} exist at all times,
474 so that if any library that Exim calls tries to use them, it doesn't crash.
475
476 Arguments: None
477 Returns: Nothing
478 */
479
480 void
481 exim_nullstd(void)
482 {
483 int i;
484 int devnull = -1;
485 struct stat statbuf;
486 for (i = 0; i <= 2; i++)
487 {
488 if (fstat(i, &statbuf) < 0 && errno == EBADF)
489 {
490 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
491 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
492 string_open_failed(errno, "/dev/null"));
493 if (devnull != i) (void)dup2(devnull, i);
494 }
495 }
496 if (devnull > 2) (void)close(devnull);
497 }
498
499
500
501
502 /*************************************************
503 * Close unwanted file descriptors for delivery *
504 *************************************************/
505
506 /* This function is called from a new process that has been forked to deliver
507 an incoming message, either directly, or using exec.
508
509 We want any smtp input streams to be closed in this new process. However, it
510 has been observed that using fclose() here causes trouble. When reading in -bS
511 input, duplicate copies of messages have been seen. The files will be sharing a
512 file pointer with the parent process, and it seems that fclose() (at least on
513 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
514 least sometimes. Hence we go for closing the underlying file descriptors.
515
516 If TLS is active, we want to shut down the TLS library, but without molesting
517 the parent's SSL connection.
518
519 For delivery of a non-SMTP message, we want to close stdin and stdout (and
520 stderr unless debugging) because the calling process might have set them up as
521 pipes and be waiting for them to close before it waits for the submission
522 process to terminate. If they aren't closed, they hold up the calling process
523 until the initial delivery process finishes, which is not what we want.
524
525 Exception: We do want it for synchronous delivery!
526
527 And notwithstanding all the above, if D_resolver is set, implying resolver
528 debugging, leave stdout open, because that's where the resolver writes its
529 debugging output.
530
531 When we close stderr (which implies we've also closed stdout), we also get rid
532 of any controlling terminal.
533
534 Arguments: None
535 Returns: Nothing
536 */
537
538 static void
539 close_unwanted(void)
540 {
541 if (smtp_input)
542 {
543 #ifdef SUPPORT_TLS
544 tls_close(TRUE, FALSE); /* Shut down the TLS library */
545 #endif
546 (void)close(fileno(smtp_in));
547 (void)close(fileno(smtp_out));
548 smtp_in = NULL;
549 }
550 else
551 {
552 (void)close(0); /* stdin */
553 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
554 if (debug_selector == 0) /* stderr */
555 {
556 if (!synchronous_delivery)
557 {
558 (void)close(2);
559 log_stderr = NULL;
560 }
561 (void)setsid();
562 }
563 }
564 }
565
566
567
568
569 /*************************************************
570 * Set uid and gid *
571 *************************************************/
572
573 /* This function sets a new uid and gid permanently, optionally calling
574 initgroups() to set auxiliary groups. There are some special cases when running
575 Exim in unprivileged modes. In these situations the effective uid will not be
576 root; if we already have the right effective uid/gid, and don't need to
577 initialize any groups, leave things as they are.
578
579 Arguments:
580 uid the uid
581 gid the gid
582 igflag TRUE if initgroups() wanted
583 msg text to use in debugging output and failure log
584
585 Returns: nothing; bombs out on failure
586 */
587
588 void
589 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
590 {
591 uid_t euid = geteuid();
592 gid_t egid = getegid();
593
594 if (euid == root_uid || euid != uid || egid != gid || igflag)
595 {
596 /* At least one OS returns +1 for initgroups failure, so just check for
597 non-zero. */
598
599 if (igflag)
600 {
601 struct passwd *pw = getpwuid(uid);
602 if (pw != NULL)
603 {
604 if (initgroups(pw->pw_name, gid) != 0)
605 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
606 (long int)uid, strerror(errno));
607 }
608 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
609 "no passwd entry for uid=%ld", (long int)uid);
610 }
611
612 if (setgid(gid) < 0 || setuid(uid) < 0)
613 {
614 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
615 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
616 }
617 }
618
619 /* Debugging output included uid/gid and all groups */
620
621 DEBUG(D_uid)
622 {
623 int group_count, save_errno;
624 gid_t group_list[NGROUPS_MAX];
625 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
626 (long int)geteuid(), (long int)getegid(), (long int)getpid());
627 group_count = getgroups(NGROUPS_MAX, group_list);
628 save_errno = errno;
629 debug_printf(" auxiliary group list:");
630 if (group_count > 0)
631 {
632 int i;
633 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
634 }
635 else if (group_count < 0)
636 debug_printf(" <error: %s>", strerror(save_errno));
637 else debug_printf(" <none>");
638 debug_printf("\n");
639 }
640 }
641
642
643
644
645 /*************************************************
646 * Exit point *
647 *************************************************/
648
649 /* Exim exits via this function so that it always clears up any open
650 databases.
651
652 Arguments:
653 rc return code
654
655 Returns: does not return
656 */
657
658 void
659 exim_exit(int rc)
660 {
661 search_tidyup();
662 DEBUG(D_any)
663 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
664 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
665 exit(rc);
666 }
667
668
669
670
671 /*************************************************
672 * Extract port from host address *
673 *************************************************/
674
675 /* Called to extract the port from the values given to -oMa and -oMi.
676 It also checks the syntax of the address, and terminates it before the
677 port data when a port is extracted.
678
679 Argument:
680 address the address, with possible port on the end
681
682 Returns: the port, or zero if there isn't one
683 bombs out on a syntax error
684 */
685
686 static int
687 check_port(uschar *address)
688 {
689 int port = host_address_extract_port(address);
690 if (string_is_ip_address(address, NULL) == 0)
691 {
692 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
693 exit(EXIT_FAILURE);
694 }
695 return port;
696 }
697
698
699
700 /*************************************************
701 * Test/verify an address *
702 *************************************************/
703
704 /* This function is called by the -bv and -bt code. It extracts a working
705 address from a full RFC 822 address. This isn't really necessary per se, but it
706 has the effect of collapsing source routes.
707
708 Arguments:
709 s the address string
710 flags flag bits for verify_address()
711 exit_value to be set for failures
712
713 Returns: nothing
714 */
715
716 static void
717 test_address(uschar *s, int flags, int *exit_value)
718 {
719 int start, end, domain;
720 uschar *parse_error = NULL;
721 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
722 FALSE);
723 if (address == NULL)
724 {
725 fprintf(stdout, "syntax error: %s\n", parse_error);
726 *exit_value = 2;
727 }
728 else
729 {
730 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
731 -1, -1, NULL, NULL, NULL);
732 if (rc == FAIL) *exit_value = 2;
733 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
734 }
735 }
736
737
738
739 /*************************************************
740 * Show supported features *
741 *************************************************/
742
743 /* This function is called for -bV/--version and for -d to output the optional
744 features of the current Exim binary.
745
746 Arguments: a FILE for printing
747 Returns: nothing
748 */
749
750 static void
751 show_whats_supported(FILE *f)
752 {
753 auth_info *authi;
754
755 #ifdef DB_VERSION_STRING
756 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
757 #elif defined(BTREEVERSION) && defined(HASHVERSION)
758 #ifdef USE_DB
759 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
760 #else
761 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
762 #endif
763 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
764 fprintf(f, "Probably ndbm\n");
765 #elif defined(USE_TDB)
766 fprintf(f, "Using tdb\n");
767 #else
768 #ifdef USE_GDBM
769 fprintf(f, "Probably GDBM (native mode)\n");
770 #else
771 fprintf(f, "Probably GDBM (compatibility mode)\n");
772 #endif
773 #endif
774
775 fprintf(f, "Support for:");
776 #ifdef SUPPORT_CRYPTEQ
777 fprintf(f, " crypteq");
778 #endif
779 #if HAVE_ICONV
780 fprintf(f, " iconv()");
781 #endif
782 #if HAVE_IPV6
783 fprintf(f, " IPv6");
784 #endif
785 #ifdef HAVE_SETCLASSRESOURCES
786 fprintf(f, " use_setclassresources");
787 #endif
788 #ifdef SUPPORT_PAM
789 fprintf(f, " PAM");
790 #endif
791 #ifdef EXIM_PERL
792 fprintf(f, " Perl");
793 #endif
794 #ifdef EXPAND_DLFUNC
795 fprintf(f, " Expand_dlfunc");
796 #endif
797 #ifdef USE_TCP_WRAPPERS
798 fprintf(f, " TCPwrappers");
799 #endif
800 #ifdef SUPPORT_TLS
801 #ifdef USE_GNUTLS
802 fprintf(f, " GnuTLS");
803 #else
804 fprintf(f, " OpenSSL");
805 #endif
806 #endif
807 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
808 fprintf(f, " translate_ip_address");
809 #endif
810 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
811 fprintf(f, " move_frozen_messages");
812 #endif
813 #ifdef WITH_CONTENT_SCAN
814 fprintf(f, " Content_Scanning");
815 #endif
816 #ifndef DISABLE_DKIM
817 fprintf(f, " DKIM");
818 #endif
819 #ifdef WITH_OLD_DEMIME
820 fprintf(f, " Old_Demime");
821 #endif
822 #ifndef DISABLE_PRDR
823 fprintf(f, " PRDR");
824 #endif
825 #ifndef DISABLE_OCSP
826 fprintf(f, " OCSP");
827 #endif
828 #ifdef EXPERIMENTAL_SPF
829 fprintf(f, " Experimental_SPF");
830 #endif
831 #ifdef EXPERIMENTAL_SRS
832 fprintf(f, " Experimental_SRS");
833 #endif
834 #ifdef EXPERIMENTAL_BRIGHTMAIL
835 fprintf(f, " Experimental_Brightmail");
836 #endif
837 #ifdef EXPERIMENTAL_DANE
838 fprintf(f, " Experimental_DANE");
839 #endif
840 #ifdef EXPERIMENTAL_DCC
841 fprintf(f, " Experimental_DCC");
842 #endif
843 #ifdef EXPERIMENTAL_DMARC
844 fprintf(f, " Experimental_DMARC");
845 #endif
846 #ifdef EXPERIMENTAL_PROXY
847 fprintf(f, " Experimental_Proxy");
848 #endif
849 #ifdef EXPERIMENTAL_EVENT
850 fprintf(f, " Experimental_Event");
851 #endif
852 #ifdef EXPERIMENTAL_REDIS
853 fprintf(f, " Experimental_Redis");
854 #endif
855 fprintf(f, "\n");
856
857 fprintf(f, "Lookups (built-in):");
858 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
859 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
860 #endif
861 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
862 fprintf(f, " cdb");
863 #endif
864 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
865 fprintf(f, " dbm dbmjz dbmnz");
866 #endif
867 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
868 fprintf(f, " dnsdb");
869 #endif
870 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
871 fprintf(f, " dsearch");
872 #endif
873 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
874 fprintf(f, " ibase");
875 #endif
876 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
877 fprintf(f, " ldap ldapdn ldapm");
878 #endif
879 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
880 fprintf(f, " mysql");
881 #endif
882 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
883 fprintf(f, " nis nis0");
884 #endif
885 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
886 fprintf(f, " nisplus");
887 #endif
888 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
889 fprintf(f, " oracle");
890 #endif
891 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
892 fprintf(f, " passwd");
893 #endif
894 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
895 fprintf(f, " pgsql");
896 #endif
897 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
898 fprintf(f, " sqlite");
899 #endif
900 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
901 fprintf(f, " testdb");
902 #endif
903 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
904 fprintf(f, " whoson");
905 #endif
906 fprintf(f, "\n");
907
908 fprintf(f, "Authenticators:");
909 #ifdef AUTH_CRAM_MD5
910 fprintf(f, " cram_md5");
911 #endif
912 #ifdef AUTH_CYRUS_SASL
913 fprintf(f, " cyrus_sasl");
914 #endif
915 #ifdef AUTH_DOVECOT
916 fprintf(f, " dovecot");
917 #endif
918 #ifdef AUTH_GSASL
919 fprintf(f, " gsasl");
920 #endif
921 #ifdef AUTH_HEIMDAL_GSSAPI
922 fprintf(f, " heimdal_gssapi");
923 #endif
924 #ifdef AUTH_PLAINTEXT
925 fprintf(f, " plaintext");
926 #endif
927 #ifdef AUTH_SPA
928 fprintf(f, " spa");
929 #endif
930 fprintf(f, "\n");
931
932 fprintf(f, "Routers:");
933 #ifdef ROUTER_ACCEPT
934 fprintf(f, " accept");
935 #endif
936 #ifdef ROUTER_DNSLOOKUP
937 fprintf(f, " dnslookup");
938 #endif
939 #ifdef ROUTER_IPLITERAL
940 fprintf(f, " ipliteral");
941 #endif
942 #ifdef ROUTER_IPLOOKUP
943 fprintf(f, " iplookup");
944 #endif
945 #ifdef ROUTER_MANUALROUTE
946 fprintf(f, " manualroute");
947 #endif
948 #ifdef ROUTER_QUERYPROGRAM
949 fprintf(f, " queryprogram");
950 #endif
951 #ifdef ROUTER_REDIRECT
952 fprintf(f, " redirect");
953 #endif
954 fprintf(f, "\n");
955
956 fprintf(f, "Transports:");
957 #ifdef TRANSPORT_APPENDFILE
958 fprintf(f, " appendfile");
959 #ifdef SUPPORT_MAILDIR
960 fprintf(f, "/maildir");
961 #endif
962 #ifdef SUPPORT_MAILSTORE
963 fprintf(f, "/mailstore");
964 #endif
965 #ifdef SUPPORT_MBX
966 fprintf(f, "/mbx");
967 #endif
968 #endif
969 #ifdef TRANSPORT_AUTOREPLY
970 fprintf(f, " autoreply");
971 #endif
972 #ifdef TRANSPORT_LMTP
973 fprintf(f, " lmtp");
974 #endif
975 #ifdef TRANSPORT_PIPE
976 fprintf(f, " pipe");
977 #endif
978 #ifdef TRANSPORT_SMTP
979 fprintf(f, " smtp");
980 #endif
981 fprintf(f, "\n");
982
983 if (fixed_never_users[0] > 0)
984 {
985 int i;
986 fprintf(f, "Fixed never_users: ");
987 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
988 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
989 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
990 }
991
992 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
993
994 /* Everything else is details which are only worth reporting when debugging.
995 Perhaps the tls_version_report should move into this too. */
996 DEBUG(D_any) do {
997
998 int i;
999
1000 /* clang defines __GNUC__ (at least, for me) so test for it first */
1001 #if defined(__clang__)
1002 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1003 #elif defined(__GNUC__)
1004 fprintf(f, "Compiler: GCC [%s]\n",
1005 # ifdef __VERSION__
1006 __VERSION__
1007 # else
1008 "? unknown version ?"
1009 # endif
1010 );
1011 #else
1012 fprintf(f, "Compiler: <unknown>\n");
1013 #endif
1014
1015 #ifdef SUPPORT_TLS
1016 tls_version_report(f);
1017 #endif
1018
1019 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
1020 if (authi->version_report) {
1021 (*authi->version_report)(f);
1022 }
1023 }
1024
1025 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1026 characters; unless it's an ancient version of PCRE in which case it
1027 is not defined. */
1028 #ifndef PCRE_PRERELEASE
1029 #define PCRE_PRERELEASE
1030 #endif
1031 #define QUOTE(X) #X
1032 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1033 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1034 " Runtime: %s\n",
1035 PCRE_MAJOR, PCRE_MINOR,
1036 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1037 pcre_version());
1038 #undef QUOTE
1039 #undef EXPAND_AND_QUOTE
1040
1041 init_lookup_list();
1042 for (i = 0; i < lookup_list_count; i++)
1043 {
1044 if (lookup_list[i]->version_report)
1045 lookup_list[i]->version_report(f);
1046 }
1047
1048 #ifdef WHITELIST_D_MACROS
1049 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1050 #else
1051 fprintf(f, "WHITELIST_D_MACROS unset\n");
1052 #endif
1053 #ifdef TRUSTED_CONFIG_LIST
1054 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1055 #else
1056 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1057 #endif
1058
1059 } while (0);
1060 }
1061
1062
1063 /*************************************************
1064 * Show auxiliary information about Exim *
1065 *************************************************/
1066
1067 static void
1068 show_exim_information(enum commandline_info request, FILE *stream)
1069 {
1070 const uschar **pp;
1071
1072 switch(request)
1073 {
1074 case CMDINFO_NONE:
1075 fprintf(stream, "Oops, something went wrong.\n");
1076 return;
1077 case CMDINFO_HELP:
1078 fprintf(stream,
1079 "The -bI: flag takes a string indicating which information to provide.\n"
1080 "If the string is not recognised, you'll get this help (on stderr).\n"
1081 "\n"
1082 " exim -bI:help this information\n"
1083 " exim -bI:dscp dscp value keywords known\n"
1084 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1085 );
1086 return;
1087 case CMDINFO_SIEVE:
1088 for (pp = exim_sieve_extension_list; *pp; ++pp)
1089 fprintf(stream, "%s\n", *pp);
1090 return;
1091 case CMDINFO_DSCP:
1092 dscp_list_to_stream(stream);
1093 return;
1094 }
1095 }
1096
1097
1098 /*************************************************
1099 * Quote a local part *
1100 *************************************************/
1101
1102 /* This function is used when a sender address or a From: or Sender: header
1103 line is being created from the caller's login, or from an authenticated_id. It
1104 applies appropriate quoting rules for a local part.
1105
1106 Argument: the local part
1107 Returns: the local part, quoted if necessary
1108 */
1109
1110 uschar *
1111 local_part_quote(uschar *lpart)
1112 {
1113 BOOL needs_quote = FALSE;
1114 int size, ptr;
1115 uschar *yield;
1116 uschar *t;
1117
1118 for (t = lpart; !needs_quote && *t != 0; t++)
1119 {
1120 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1121 (*t != '.' || t == lpart || t[1] == 0);
1122 }
1123
1124 if (!needs_quote) return lpart;
1125
1126 size = ptr = 0;
1127 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1128
1129 for (;;)
1130 {
1131 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1132 if (nq == NULL)
1133 {
1134 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1135 break;
1136 }
1137 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1138 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1139 yield = string_cat(yield, &size, &ptr, nq, 1);
1140 lpart = nq + 1;
1141 }
1142
1143 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1144 yield[ptr] = 0;
1145 return yield;
1146 }
1147
1148
1149
1150 #ifdef USE_READLINE
1151 /*************************************************
1152 * Load readline() functions *
1153 *************************************************/
1154
1155 /* This function is called from testing executions that read data from stdin,
1156 but only when running as the calling user. Currently, only -be does this. The
1157 function loads the readline() function library and passes back the functions.
1158 On some systems, it needs the curses library, so load that too, but try without
1159 it if loading fails. All this functionality has to be requested at build time.
1160
1161 Arguments:
1162 fn_readline_ptr pointer to where to put the readline pointer
1163 fn_addhist_ptr pointer to where to put the addhistory function
1164
1165 Returns: the dlopen handle or NULL on failure
1166 */
1167
1168 static void *
1169 set_readline(char * (**fn_readline_ptr)(const char *),
1170 void (**fn_addhist_ptr)(const char *))
1171 {
1172 void *dlhandle;
1173 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1174
1175 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1176 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1177
1178 if (dlhandle != NULL)
1179 {
1180 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1181 * char * readline (const char *prompt);
1182 * void add_history (const char *string);
1183 */
1184 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1185 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1186 }
1187 else
1188 {
1189 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1190 }
1191
1192 return dlhandle;
1193 }
1194 #endif
1195
1196
1197
1198 /*************************************************
1199 * Get a line from stdin for testing things *
1200 *************************************************/
1201
1202 /* This function is called when running tests that can take a number of lines
1203 of input (for example, -be and -bt). It handles continuations and trailing
1204 spaces. And prompting and a blank line output on eof. If readline() is in use,
1205 the arguments are non-NULL and provide the relevant functions.
1206
1207 Arguments:
1208 fn_readline readline function or NULL
1209 fn_addhist addhist function or NULL
1210
1211 Returns: pointer to dynamic memory, or NULL at end of file
1212 */
1213
1214 static uschar *
1215 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1216 {
1217 int i;
1218 int size = 0;
1219 int ptr = 0;
1220 uschar *yield = NULL;
1221
1222 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1223
1224 for (i = 0;; i++)
1225 {
1226 uschar buffer[1024];
1227 uschar *p, *ss;
1228
1229 #ifdef USE_READLINE
1230 char *readline_line = NULL;
1231 if (fn_readline != NULL)
1232 {
1233 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1234 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1235 p = US readline_line;
1236 }
1237 else
1238 #endif
1239
1240 /* readline() not in use */
1241
1242 {
1243 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1244 p = buffer;
1245 }
1246
1247 /* Handle the line */
1248
1249 ss = p + (int)Ustrlen(p);
1250 while (ss > p && isspace(ss[-1])) ss--;
1251
1252 if (i > 0)
1253 {
1254 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1255 }
1256
1257 yield = string_cat(yield, &size, &ptr, p, ss - p);
1258
1259 #ifdef USE_READLINE
1260 if (fn_readline != NULL) free(readline_line);
1261 #endif
1262
1263 if (ss == p || yield[ptr-1] != '\\')
1264 {
1265 yield[ptr] = 0;
1266 break;
1267 }
1268 yield[--ptr] = 0;
1269 }
1270
1271 if (yield == NULL) printf("\n");
1272 return yield;
1273 }
1274
1275
1276
1277 /*************************************************
1278 * Output usage information for the program *
1279 *************************************************/
1280
1281 /* This function is called when there are no recipients
1282 or a specific --help argument was added.
1283
1284 Arguments:
1285 progname information on what name we were called by
1286
1287 Returns: DOES NOT RETURN
1288 */
1289
1290 static void
1291 exim_usage(uschar *progname)
1292 {
1293
1294 /* Handle specific program invocation varients */
1295 if (Ustrcmp(progname, US"-mailq") == 0)
1296 {
1297 fprintf(stderr,
1298 "mailq - list the contents of the mail queue\n\n"
1299 "For a list of options, see the Exim documentation.\n");
1300 exit(EXIT_FAILURE);
1301 }
1302
1303 /* Generic usage - we output this whatever happens */
1304 fprintf(stderr,
1305 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1306 "not directly from a shell command line. Options and/or arguments control\n"
1307 "what it does when called. For a list of options, see the Exim documentation.\n");
1308
1309 exit(EXIT_FAILURE);
1310 }
1311
1312
1313
1314 /*************************************************
1315 * Validate that the macros given are okay *
1316 *************************************************/
1317
1318 /* Typically, Exim will drop privileges if macros are supplied. In some
1319 cases, we want to not do so.
1320
1321 Arguments: none (macros is a global)
1322 Returns: true if trusted, false otherwise
1323 */
1324
1325 static BOOL
1326 macros_trusted(void)
1327 {
1328 #ifdef WHITELIST_D_MACROS
1329 macro_item *m;
1330 uschar *whitelisted, *end, *p, **whites, **w;
1331 int white_count, i, n;
1332 size_t len;
1333 BOOL prev_char_item, found;
1334 #endif
1335
1336 if (macros == NULL)
1337 return TRUE;
1338 #ifndef WHITELIST_D_MACROS
1339 return FALSE;
1340 #else
1341
1342 /* We only trust -D overrides for some invoking users:
1343 root, the exim run-time user, the optional config owner user.
1344 I don't know why config-owner would be needed, but since they can own the
1345 config files anyway, there's no security risk to letting them override -D. */
1346 if ( ! ((real_uid == root_uid)
1347 || (real_uid == exim_uid)
1348 #ifdef CONFIGURE_OWNER
1349 || (real_uid == config_uid)
1350 #endif
1351 ))
1352 {
1353 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1354 return FALSE;
1355 }
1356
1357 /* Get a list of macros which are whitelisted */
1358 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1359 prev_char_item = FALSE;
1360 white_count = 0;
1361 for (p = whitelisted; *p != '\0'; ++p)
1362 {
1363 if (*p == ':' || isspace(*p))
1364 {
1365 *p = '\0';
1366 if (prev_char_item)
1367 ++white_count;
1368 prev_char_item = FALSE;
1369 continue;
1370 }
1371 if (!prev_char_item)
1372 prev_char_item = TRUE;
1373 }
1374 end = p;
1375 if (prev_char_item)
1376 ++white_count;
1377 if (!white_count)
1378 return FALSE;
1379 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1380 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1381 {
1382 if (*p != '\0')
1383 {
1384 whites[i++] = p;
1385 if (i == white_count)
1386 break;
1387 while (*p != '\0' && p < end)
1388 ++p;
1389 }
1390 }
1391 whites[i] = NULL;
1392
1393 /* The list of macros should be very short. Accept the N*M complexity. */
1394 for (m = macros; m != NULL; m = m->next)
1395 {
1396 found = FALSE;
1397 for (w = whites; *w; ++w)
1398 if (Ustrcmp(*w, m->name) == 0)
1399 {
1400 found = TRUE;
1401 break;
1402 }
1403 if (!found)
1404 return FALSE;
1405 if (m->replacement == NULL)
1406 continue;
1407 len = Ustrlen(m->replacement);
1408 if (len == 0)
1409 continue;
1410 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1411 0, PCRE_EOPT, NULL, 0);
1412 if (n < 0)
1413 {
1414 if (n != PCRE_ERROR_NOMATCH)
1415 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1416 return FALSE;
1417 }
1418 }
1419 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1420 return TRUE;
1421 #endif
1422 }
1423
1424
1425 /*************************************************
1426 * Entry point and high-level code *
1427 *************************************************/
1428
1429 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1430 the appropriate action. All the necessary functions are present in the one
1431 binary. I originally thought one should split it up, but it turns out that so
1432 much of the apparatus is needed in each chunk that one might as well just have
1433 it all available all the time, which then makes the coding easier as well.
1434
1435 Arguments:
1436 argc count of entries in argv
1437 argv argument strings, with argv[0] being the program name
1438
1439 Returns: EXIT_SUCCESS if terminated successfully
1440 EXIT_FAILURE otherwise, except when a message has been sent
1441 to the sender, and -oee was given
1442 */
1443
1444 int
1445 main(int argc, char **cargv)
1446 {
1447 uschar **argv = USS cargv;
1448 int arg_receive_timeout = -1;
1449 int arg_smtp_receive_timeout = -1;
1450 int arg_error_handling = error_handling;
1451 int filter_sfd = -1;
1452 int filter_ufd = -1;
1453 int group_count;
1454 int i, rv;
1455 int list_queue_option = 0;
1456 int msg_action = 0;
1457 int msg_action_arg = -1;
1458 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1459 int queue_only_reason = 0;
1460 #ifdef EXIM_PERL
1461 int perl_start_option = 0;
1462 #endif
1463 int recipients_arg = argc;
1464 int sender_address_domain = 0;
1465 int test_retry_arg = -1;
1466 int test_rewrite_arg = -1;
1467 BOOL arg_queue_only = FALSE;
1468 BOOL bi_option = FALSE;
1469 BOOL checking = FALSE;
1470 BOOL count_queue = FALSE;
1471 BOOL expansion_test = FALSE;
1472 BOOL extract_recipients = FALSE;
1473 BOOL flag_G = FALSE;
1474 BOOL flag_n = FALSE;
1475 BOOL forced_delivery = FALSE;
1476 BOOL f_end_dot = FALSE;
1477 BOOL deliver_give_up = FALSE;
1478 BOOL list_queue = FALSE;
1479 BOOL list_options = FALSE;
1480 BOOL local_queue_only;
1481 BOOL more = TRUE;
1482 BOOL one_msg_action = FALSE;
1483 BOOL queue_only_set = FALSE;
1484 BOOL receiving_message = TRUE;
1485 BOOL sender_ident_set = FALSE;
1486 BOOL session_local_queue_only;
1487 BOOL unprivileged;
1488 BOOL removed_privilege = FALSE;
1489 BOOL usage_wanted = FALSE;
1490 BOOL verify_address_mode = FALSE;
1491 BOOL verify_as_sender = FALSE;
1492 BOOL version_printed = FALSE;
1493 uschar *alias_arg = NULL;
1494 uschar *called_as = US"";
1495 uschar *cmdline_syslog_name = NULL;
1496 uschar *start_queue_run_id = NULL;
1497 uschar *stop_queue_run_id = NULL;
1498 uschar *expansion_test_message = NULL;
1499 uschar *ftest_domain = NULL;
1500 uschar *ftest_localpart = NULL;
1501 uschar *ftest_prefix = NULL;
1502 uschar *ftest_suffix = NULL;
1503 uschar *log_oneline = NULL;
1504 uschar *malware_test_file = NULL;
1505 uschar *real_sender_address;
1506 uschar *originator_home = US"/";
1507 size_t sz;
1508 void *reset_point;
1509
1510 struct passwd *pw;
1511 struct stat statbuf;
1512 pid_t passed_qr_pid = (pid_t)0;
1513 int passed_qr_pipe = -1;
1514 gid_t group_list[NGROUPS_MAX];
1515
1516 /* For the -bI: flag */
1517 enum commandline_info info_flag = CMDINFO_NONE;
1518 BOOL info_stdout = FALSE;
1519
1520 /* Possible options for -R and -S */
1521
1522 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1523
1524 /* Need to define this in case we need to change the environment in order
1525 to get rid of a bogus time zone. We have to make it char rather than uschar
1526 because some OS define it in /usr/include/unistd.h. */
1527
1528 extern char **environ;
1529
1530 /* If the Exim user and/or group and/or the configuration file owner/group were
1531 defined by ref:name at build time, we must now find the actual uid/gid values.
1532 This is a feature to make the lives of binary distributors easier. */
1533
1534 #ifdef EXIM_USERNAME
1535 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1536 {
1537 if (exim_uid == 0)
1538 {
1539 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1540 EXIM_USERNAME);
1541 exit(EXIT_FAILURE);
1542 }
1543 /* If ref:name uses a number as the name, route_finduser() returns
1544 TRUE with exim_uid set and pw coerced to NULL. */
1545 if (pw)
1546 exim_gid = pw->pw_gid;
1547 #ifndef EXIM_GROUPNAME
1548 else
1549 {
1550 fprintf(stderr,
1551 "exim: ref:name should specify a usercode, not a group.\n"
1552 "exim: can't let you get away with it unless you also specify a group.\n");
1553 exit(EXIT_FAILURE);
1554 }
1555 #endif
1556 }
1557 else
1558 {
1559 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1560 EXIM_USERNAME);
1561 exit(EXIT_FAILURE);
1562 }
1563 #endif
1564
1565 #ifdef EXIM_GROUPNAME
1566 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1567 {
1568 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1569 EXIM_GROUPNAME);
1570 exit(EXIT_FAILURE);
1571 }
1572 #endif
1573
1574 #ifdef CONFIGURE_OWNERNAME
1575 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1576 {
1577 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1578 CONFIGURE_OWNERNAME);
1579 exit(EXIT_FAILURE);
1580 }
1581 #endif
1582
1583 /* We default the system_filter_user to be the Exim run-time user, as a
1584 sane non-root value. */
1585 system_filter_uid = exim_uid;
1586
1587 #ifdef CONFIGURE_GROUPNAME
1588 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1589 {
1590 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1591 CONFIGURE_GROUPNAME);
1592 exit(EXIT_FAILURE);
1593 }
1594 #endif
1595
1596 /* In the Cygwin environment, some initialization needs doing. It is fudged
1597 in by means of this macro. */
1598
1599 #ifdef OS_INIT
1600 OS_INIT
1601 #endif
1602
1603 /* Check a field which is patched when we are running Exim within its
1604 testing harness; do a fast initial check, and then the whole thing. */
1605
1606 running_in_test_harness =
1607 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1608
1609 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1610 at the start of a program; however, it seems that some environments do not
1611 follow this. A "strange" locale can affect the formatting of timestamps, so we
1612 make quite sure. */
1613
1614 setlocale(LC_ALL, "C");
1615
1616 /* Set up the default handler for timing using alarm(). */
1617
1618 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1619
1620 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1621 because store_malloc writes a log entry on failure. */
1622
1623 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1624 if (log_buffer == NULL)
1625 {
1626 fprintf(stderr, "exim: failed to get store for log buffer\n");
1627 exit(EXIT_FAILURE);
1628 }
1629
1630 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1631 NULL when the daemon is run and the file is closed. We have to use this
1632 indirection, because some systems don't allow writing to the variable "stderr".
1633 */
1634
1635 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1636
1637 /* Arrange for the PCRE regex library to use our store functions. Note that
1638 the normal calls are actually macros that add additional arguments for
1639 debugging purposes so we have to assign specially constructed functions here.
1640 The default is to use store in the stacking pool, but this is overridden in the
1641 regex_must_compile() function. */
1642
1643 pcre_malloc = function_store_get;
1644 pcre_free = function_dummy_free;
1645
1646 /* Ensure there is a big buffer for temporary use in several places. It is put
1647 in malloc store so that it can be freed for enlargement if necessary. */
1648
1649 big_buffer = store_malloc(big_buffer_size);
1650
1651 /* Set up the handler for the data request signal, and set the initial
1652 descriptive text. */
1653
1654 set_process_info("initializing");
1655 os_restarting_signal(SIGUSR1, usr1_handler);
1656
1657 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1658 in the daemon code. For the rest of Exim's uses, we ignore it. */
1659
1660 signal(SIGHUP, SIG_IGN);
1661
1662 /* We don't want to die on pipe errors as the code is written to handle
1663 the write error instead. */
1664
1665 signal(SIGPIPE, SIG_IGN);
1666
1667 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1668 set to SIG_IGN. This causes subprocesses that complete before the parent
1669 process waits for them not to hang around, so when Exim calls wait(), nothing
1670 is there. The wait() code has been made robust against this, but let's ensure
1671 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1672 ending status. We use sigaction rather than plain signal() on those OS where
1673 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1674 problem on AIX with this.) */
1675
1676 #ifdef SA_NOCLDWAIT
1677 {
1678 struct sigaction act;
1679 act.sa_handler = SIG_DFL;
1680 sigemptyset(&(act.sa_mask));
1681 act.sa_flags = 0;
1682 sigaction(SIGCHLD, &act, NULL);
1683 }
1684 #else
1685 signal(SIGCHLD, SIG_DFL);
1686 #endif
1687
1688 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1689 SIGHUP. */
1690
1691 sighup_argv = argv;
1692
1693 /* Set up the version number. Set up the leading 'E' for the external form of
1694 message ids, set the pointer to the internal form, and initialize it to
1695 indicate no message being processed. */
1696
1697 version_init();
1698 message_id_option[0] = '-';
1699 message_id_external = message_id_option + 1;
1700 message_id_external[0] = 'E';
1701 message_id = message_id_external + 1;
1702 message_id[0] = 0;
1703
1704 /* Set the umask to zero so that any files Exim creates using open() are
1705 created with the modes that it specifies. NOTE: Files created with fopen() have
1706 a problem, which was not recognized till rather late (February 2006). With this
1707 umask, such files will be world writeable. (They are all content scanning files
1708 in the spool directory, which isn't world-accessible, so this is not a
1709 disaster, but it's untidy.) I don't want to change this overall setting,
1710 however, because it will interact badly with the open() calls. Instead, there's
1711 now a function called modefopen() that fiddles with the umask while calling
1712 fopen(). */
1713
1714 (void)umask(0);
1715
1716 /* Precompile the regular expression for matching a message id. Keep this in
1717 step with the code that generates ids in the accept.c module. We need to do
1718 this here, because the -M options check their arguments for syntactic validity
1719 using mac_ismsgid, which uses this. */
1720
1721 regex_ismsgid =
1722 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1723
1724 /* Precompile the regular expression that is used for matching an SMTP error
1725 code, possibly extended, at the start of an error message. Note that the
1726 terminating whitespace character is included. */
1727
1728 regex_smtp_code =
1729 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1730 FALSE, TRUE);
1731
1732 #ifdef WHITELIST_D_MACROS
1733 /* Precompile the regular expression used to filter the content of macros
1734 given to -D for permissibility. */
1735
1736 regex_whitelisted_macro =
1737 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1738 #endif
1739
1740
1741 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1742 this seems to be a generally accepted convention, since one finds symbolic
1743 links called "mailq" in standard OS configurations. */
1744
1745 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1746 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1747 {
1748 list_queue = TRUE;
1749 receiving_message = FALSE;
1750 called_as = US"-mailq";
1751 }
1752
1753 /* If the program is called as "rmail" treat it as equivalent to
1754 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1755 i.e. preventing a single dot on a line from terminating the message, and
1756 returning with zero return code, even in cases of error (provided an error
1757 message has been sent). */
1758
1759 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1760 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1761 {
1762 dot_ends = FALSE;
1763 called_as = US"-rmail";
1764 errors_sender_rc = EXIT_SUCCESS;
1765 }
1766
1767 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1768 this is a smail convention. */
1769
1770 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1771 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1772 {
1773 smtp_input = smtp_batched_input = TRUE;
1774 called_as = US"-rsmtp";
1775 }
1776
1777 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1778 this is a smail convention. */
1779
1780 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1781 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1782 {
1783 queue_interval = 0;
1784 receiving_message = FALSE;
1785 called_as = US"-runq";
1786 }
1787
1788 /* If the program is called as "newaliases" treat it as equivalent to
1789 "exim -bi"; this is a sendmail convention. */
1790
1791 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1792 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1793 {
1794 bi_option = TRUE;
1795 receiving_message = FALSE;
1796 called_as = US"-newaliases";
1797 }
1798
1799 /* Save the original effective uid for a couple of uses later. It should
1800 normally be root, but in some esoteric environments it may not be. */
1801
1802 original_euid = geteuid();
1803
1804 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1805 to be the same as the real ones. This makes a difference only if Exim is setuid
1806 (or setgid) to something other than root, which could be the case in some
1807 special configurations. */
1808
1809 real_uid = getuid();
1810 real_gid = getgid();
1811
1812 if (real_uid == root_uid)
1813 {
1814 rv = setgid(real_gid);
1815 if (rv)
1816 {
1817 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1818 (long int)real_gid, strerror(errno));
1819 exit(EXIT_FAILURE);
1820 }
1821 rv = setuid(real_uid);
1822 if (rv)
1823 {
1824 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1825 (long int)real_uid, strerror(errno));
1826 exit(EXIT_FAILURE);
1827 }
1828 }
1829
1830 /* If neither the original real uid nor the original euid was root, Exim is
1831 running in an unprivileged state. */
1832
1833 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1834
1835 /* Scan the program's arguments. Some can be dealt with right away; others are
1836 simply recorded for checking and handling afterwards. Do a high-level switch
1837 on the second character (the one after '-'), to save some effort. */
1838
1839 for (i = 1; i < argc; i++)
1840 {
1841 BOOL badarg = FALSE;
1842 uschar *arg = argv[i];
1843 uschar *argrest;
1844 int switchchar;
1845
1846 /* An argument not starting with '-' is the start of a recipients list;
1847 break out of the options-scanning loop. */
1848
1849 if (arg[0] != '-')
1850 {
1851 recipients_arg = i;
1852 break;
1853 }
1854
1855 /* An option consistion of -- terminates the options */
1856
1857 if (Ustrcmp(arg, "--") == 0)
1858 {
1859 recipients_arg = i + 1;
1860 break;
1861 }
1862
1863 /* Handle flagged options */
1864
1865 switchchar = arg[1];
1866 argrest = arg+2;
1867
1868 /* Make all -ex options synonymous with -oex arguments, since that
1869 is assumed by various callers. Also make -qR options synonymous with -R
1870 options, as that seems to be required as well. Allow for -qqR too, and
1871 the same for -S options. */
1872
1873 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1874 Ustrncmp(arg+1, "qR", 2) == 0 ||
1875 Ustrncmp(arg+1, "qS", 2) == 0)
1876 {
1877 switchchar = arg[2];
1878 argrest++;
1879 }
1880 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1881 {
1882 switchchar = arg[3];
1883 argrest += 2;
1884 queue_2stage = TRUE;
1885 }
1886
1887 /* Make -r synonymous with -f, since it is a documented alias */
1888
1889 else if (arg[1] == 'r') switchchar = 'f';
1890
1891 /* Make -ov synonymous with -v */
1892
1893 else if (Ustrcmp(arg, "-ov") == 0)
1894 {
1895 switchchar = 'v';
1896 argrest++;
1897 }
1898
1899 /* deal with --option_aliases */
1900 else if (switchchar == '-')
1901 {
1902 if (Ustrcmp(argrest, "help") == 0)
1903 {
1904 usage_wanted = TRUE;
1905 break;
1906 }
1907 else if (Ustrcmp(argrest, "version") == 0)
1908 {
1909 switchchar = 'b';
1910 argrest = US"V";
1911 }
1912 }
1913
1914 /* High-level switch on active initial letter */
1915
1916 switch(switchchar)
1917 {
1918
1919 /* sendmail uses -Ac and -Am to control which .cf file is used;
1920 we ignore them. */
1921 case 'A':
1922 if (*argrest == '\0') { badarg = TRUE; break; }
1923 else
1924 {
1925 BOOL ignore = FALSE;
1926 switch (*argrest)
1927 {
1928 case 'c':
1929 case 'm':
1930 if (*(argrest + 1) == '\0')
1931 ignore = TRUE;
1932 break;
1933 }
1934 if (!ignore) { badarg = TRUE; break; }
1935 }
1936 break;
1937
1938 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1939 so has no need of it. */
1940
1941 case 'B':
1942 if (*argrest == 0) i++; /* Skip over the type */
1943 break;
1944
1945
1946 case 'b':
1947 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1948
1949 /* -bd: Run in daemon mode, awaiting SMTP connections.
1950 -bdf: Ditto, but in the foreground.
1951 */
1952
1953 if (*argrest == 'd')
1954 {
1955 daemon_listen = TRUE;
1956 if (*(++argrest) == 'f') background_daemon = FALSE;
1957 else if (*argrest != 0) { badarg = TRUE; break; }
1958 }
1959
1960 /* -be: Run in expansion test mode
1961 -bem: Ditto, but read a message from a file first
1962 */
1963
1964 else if (*argrest == 'e')
1965 {
1966 expansion_test = checking = TRUE;
1967 if (argrest[1] == 'm')
1968 {
1969 if (++i >= argc) { badarg = TRUE; break; }
1970 expansion_test_message = argv[i];
1971 argrest++;
1972 }
1973 if (argrest[1] != 0) { badarg = TRUE; break; }
1974 }
1975
1976 /* -bF: Run system filter test */
1977
1978 else if (*argrest == 'F')
1979 {
1980 filter_test |= FTEST_SYSTEM;
1981 if (*(++argrest) != 0) { badarg = TRUE; break; }
1982 if (++i < argc) filter_test_sfile = argv[i]; else
1983 {
1984 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1985 exit(EXIT_FAILURE);
1986 }
1987 }
1988
1989 /* -bf: Run user filter test
1990 -bfd: Set domain for filter testing
1991 -bfl: Set local part for filter testing
1992 -bfp: Set prefix for filter testing
1993 -bfs: Set suffix for filter testing
1994 */
1995
1996 else if (*argrest == 'f')
1997 {
1998 if (*(++argrest) == 0)
1999 {
2000 filter_test |= FTEST_USER;
2001 if (++i < argc) filter_test_ufile = argv[i]; else
2002 {
2003 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2004 exit(EXIT_FAILURE);
2005 }
2006 }
2007 else
2008 {
2009 if (++i >= argc)
2010 {
2011 fprintf(stderr, "exim: string expected after %s\n", arg);
2012 exit(EXIT_FAILURE);
2013 }
2014 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2015 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2016 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2017 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2018 else { badarg = TRUE; break; }
2019 }
2020 }
2021
2022 /* -bh: Host checking - an IP address must follow. */
2023
2024 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2025 {
2026 if (++i >= argc) { badarg = TRUE; break; }
2027 sender_host_address = argv[i];
2028 host_checking = checking = log_testing_mode = TRUE;
2029 host_checking_callout = argrest[1] == 'c';
2030 }
2031
2032 /* -bi: This option is used by sendmail to initialize *the* alias file,
2033 though it has the -oA option to specify a different file. Exim has no
2034 concept of *the* alias file, but since Sun's YP make script calls
2035 sendmail this way, some support must be provided. */
2036
2037 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2038
2039 /* -bI: provide information, of the type to follow after a colon.
2040 This is an Exim flag. */
2041
2042 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2043 {
2044 uschar *p = &argrest[2];
2045 info_flag = CMDINFO_HELP;
2046 if (Ustrlen(p))
2047 {
2048 if (strcmpic(p, CUS"sieve") == 0)
2049 {
2050 info_flag = CMDINFO_SIEVE;
2051 info_stdout = TRUE;
2052 }
2053 else if (strcmpic(p, CUS"dscp") == 0)
2054 {
2055 info_flag = CMDINFO_DSCP;
2056 info_stdout = TRUE;
2057 }
2058 else if (strcmpic(p, CUS"help") == 0)
2059 {
2060 info_stdout = TRUE;
2061 }
2062 }
2063 }
2064
2065 /* -bm: Accept and deliver message - the default option. Reinstate
2066 receiving_message, which got turned off for all -b options. */
2067
2068 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2069
2070 /* -bmalware: test the filename given for malware */
2071
2072 else if (Ustrcmp(argrest, "malware") == 0)
2073 {
2074 if (++i >= argc) { badarg = TRUE; break; }
2075 malware_test_file = argv[i];
2076 }
2077
2078 /* -bnq: For locally originating messages, do not qualify unqualified
2079 addresses. In the envelope, this causes errors; in header lines they
2080 just get left. */
2081
2082 else if (Ustrcmp(argrest, "nq") == 0)
2083 {
2084 allow_unqualified_sender = FALSE;
2085 allow_unqualified_recipient = FALSE;
2086 }
2087
2088 /* -bpxx: List the contents of the mail queue, in various forms. If
2089 the option is -bpc, just a queue count is needed. Otherwise, if the
2090 first letter after p is r, then order is random. */
2091
2092 else if (*argrest == 'p')
2093 {
2094 if (*(++argrest) == 'c')
2095 {
2096 count_queue = TRUE;
2097 if (*(++argrest) != 0) badarg = TRUE;
2098 break;
2099 }
2100
2101 if (*argrest == 'r')
2102 {
2103 list_queue_option = 8;
2104 argrest++;
2105 }
2106 else list_queue_option = 0;
2107
2108 list_queue = TRUE;
2109
2110 /* -bp: List the contents of the mail queue, top-level only */
2111
2112 if (*argrest == 0) {}
2113
2114 /* -bpu: List the contents of the mail queue, top-level undelivered */
2115
2116 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2117
2118 /* -bpa: List the contents of the mail queue, including all delivered */
2119
2120 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2121
2122 /* Unknown after -bp[r] */
2123
2124 else
2125 {
2126 badarg = TRUE;
2127 break;
2128 }
2129 }
2130
2131
2132 /* -bP: List the configuration variables given as the address list.
2133 Force -v, so configuration errors get displayed. */
2134
2135 else if (Ustrcmp(argrest, "P") == 0)
2136 {
2137 list_options = TRUE;
2138 debug_selector |= D_v;
2139 debug_file = stderr;
2140 }
2141
2142 /* -brt: Test retry configuration lookup */
2143
2144 else if (Ustrcmp(argrest, "rt") == 0)
2145 {
2146 test_retry_arg = i + 1;
2147 goto END_ARG;
2148 }
2149
2150 /* -brw: Test rewrite configuration */
2151
2152 else if (Ustrcmp(argrest, "rw") == 0)
2153 {
2154 test_rewrite_arg = i + 1;
2155 goto END_ARG;
2156 }
2157
2158 /* -bS: Read SMTP commands on standard input, but produce no replies -
2159 all errors are reported by sending messages. */
2160
2161 else if (Ustrcmp(argrest, "S") == 0)
2162 smtp_input = smtp_batched_input = receiving_message = TRUE;
2163
2164 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2165 on standard output. */
2166
2167 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2168
2169 /* -bt: address testing mode */
2170
2171 else if (Ustrcmp(argrest, "t") == 0)
2172 address_test_mode = checking = log_testing_mode = TRUE;
2173
2174 /* -bv: verify addresses */
2175
2176 else if (Ustrcmp(argrest, "v") == 0)
2177 verify_address_mode = checking = log_testing_mode = TRUE;
2178
2179 /* -bvs: verify sender addresses */
2180
2181 else if (Ustrcmp(argrest, "vs") == 0)
2182 {
2183 verify_address_mode = checking = log_testing_mode = TRUE;
2184 verify_as_sender = TRUE;
2185 }
2186
2187 /* -bV: Print version string and support details */
2188
2189 else if (Ustrcmp(argrest, "V") == 0)
2190 {
2191 printf("Exim version %s #%s built %s\n", version_string,
2192 version_cnumber, version_date);
2193 printf("%s\n", CS version_copyright);
2194 version_printed = TRUE;
2195 show_whats_supported(stdout);
2196 }
2197
2198 /* -bw: inetd wait mode, accept a listening socket as stdin */
2199
2200 else if (*argrest == 'w')
2201 {
2202 inetd_wait_mode = TRUE;
2203 background_daemon = FALSE;
2204 daemon_listen = TRUE;
2205 if (*(++argrest) != '\0')
2206 {
2207 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2208 if (inetd_wait_timeout <= 0)
2209 {
2210 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2211 exit(EXIT_FAILURE);
2212 }
2213 }
2214 }
2215
2216 else badarg = TRUE;
2217 break;
2218
2219
2220 /* -C: change configuration file list; ignore if it isn't really
2221 a change! Enforce a prefix check if required. */
2222
2223 case 'C':
2224 if (*argrest == 0)
2225 {
2226 if(++i < argc) argrest = argv[i]; else
2227 { badarg = TRUE; break; }
2228 }
2229 if (Ustrcmp(config_main_filelist, argrest) != 0)
2230 {
2231 #ifdef ALT_CONFIG_PREFIX
2232 int sep = 0;
2233 int len = Ustrlen(ALT_CONFIG_PREFIX);
2234 uschar *list = argrest;
2235 uschar *filename;
2236 while((filename = string_nextinlist(&list, &sep, big_buffer,
2237 big_buffer_size)) != NULL)
2238 {
2239 if ((Ustrlen(filename) < len ||
2240 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2241 Ustrstr(filename, "/../") != NULL) &&
2242 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2243 {
2244 fprintf(stderr, "-C Permission denied\n");
2245 exit(EXIT_FAILURE);
2246 }
2247 }
2248 #endif
2249 if (real_uid != root_uid)
2250 {
2251 #ifdef TRUSTED_CONFIG_LIST
2252
2253 if (real_uid != exim_uid
2254 #ifdef CONFIGURE_OWNER
2255 && real_uid != config_uid
2256 #endif
2257 )
2258 trusted_config = FALSE;
2259 else
2260 {
2261 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2262 if (trust_list)
2263 {
2264 struct stat statbuf;
2265
2266 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2267 (statbuf.st_uid != root_uid /* owner not root */
2268 #ifdef CONFIGURE_OWNER
2269 && statbuf.st_uid != config_uid /* owner not the special one */
2270 #endif
2271 ) || /* or */
2272 (statbuf.st_gid != root_gid /* group not root */
2273 #ifdef CONFIGURE_GROUP
2274 && statbuf.st_gid != config_gid /* group not the special one */
2275 #endif
2276 && (statbuf.st_mode & 020) != 0 /* group writeable */
2277 ) || /* or */
2278 (statbuf.st_mode & 2) != 0) /* world writeable */
2279 {
2280 trusted_config = FALSE;
2281 fclose(trust_list);
2282 }
2283 else
2284 {
2285 /* Well, the trust list at least is up to scratch... */
2286 void *reset_point = store_get(0);
2287 uschar *trusted_configs[32];
2288 int nr_configs = 0;
2289 int i = 0;
2290
2291 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2292 {
2293 uschar *start = big_buffer, *nl;
2294 while (*start && isspace(*start))
2295 start++;
2296 if (*start != '/')
2297 continue;
2298 nl = Ustrchr(start, '\n');
2299 if (nl)
2300 *nl = 0;
2301 trusted_configs[nr_configs++] = string_copy(start);
2302 if (nr_configs == 32)
2303 break;
2304 }
2305 fclose(trust_list);
2306
2307 if (nr_configs)
2308 {
2309 int sep = 0;
2310 uschar *list = argrest;
2311 uschar *filename;
2312 while (trusted_config && (filename = string_nextinlist(&list,
2313 &sep, big_buffer, big_buffer_size)) != NULL)
2314 {
2315 for (i=0; i < nr_configs; i++)
2316 {
2317 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2318 break;
2319 }
2320 if (i == nr_configs)
2321 {
2322 trusted_config = FALSE;
2323 break;
2324 }
2325 }
2326 store_reset(reset_point);
2327 }
2328 else
2329 {
2330 /* No valid prefixes found in trust_list file. */
2331 trusted_config = FALSE;
2332 }
2333 }
2334 }
2335 else
2336 {
2337 /* Could not open trust_list file. */
2338 trusted_config = FALSE;
2339 }
2340 }
2341 #else
2342 /* Not root; don't trust config */
2343 trusted_config = FALSE;
2344 #endif
2345 }
2346
2347 config_main_filelist = argrest;
2348 config_changed = TRUE;
2349 }
2350 break;
2351
2352
2353 /* -D: set up a macro definition */
2354
2355 case 'D':
2356 #ifdef DISABLE_D_OPTION
2357 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2358 exit(EXIT_FAILURE);
2359 #else
2360 {
2361 int ptr = 0;
2362 macro_item *mlast = NULL;
2363 macro_item *m;
2364 uschar name[24];
2365 uschar *s = argrest;
2366
2367 while (isspace(*s)) s++;
2368
2369 if (*s < 'A' || *s > 'Z')
2370 {
2371 fprintf(stderr, "exim: macro name set by -D must start with "
2372 "an upper case letter\n");
2373 exit(EXIT_FAILURE);
2374 }
2375
2376 while (isalnum(*s) || *s == '_')
2377 {
2378 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2379 s++;
2380 }
2381 name[ptr] = 0;
2382 if (ptr == 0) { badarg = TRUE; break; }
2383 while (isspace(*s)) s++;
2384 if (*s != 0)
2385 {
2386 if (*s++ != '=') { badarg = TRUE; break; }
2387 while (isspace(*s)) s++;
2388 }
2389
2390 for (m = macros; m != NULL; m = m->next)
2391 {
2392 if (Ustrcmp(m->name, name) == 0)
2393 {
2394 fprintf(stderr, "exim: duplicated -D in command line\n");
2395 exit(EXIT_FAILURE);
2396 }
2397 mlast = m;
2398 }
2399
2400 m = store_get(sizeof(macro_item) + Ustrlen(name));
2401 m->next = NULL;
2402 m->command_line = TRUE;
2403 if (mlast == NULL) macros = m; else mlast->next = m;
2404 Ustrcpy(m->name, name);
2405 m->replacement = string_copy(s);
2406
2407 if (clmacro_count >= MAX_CLMACROS)
2408 {
2409 fprintf(stderr, "exim: too many -D options on command line\n");
2410 exit(EXIT_FAILURE);
2411 }
2412 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2413 m->replacement);
2414 }
2415 #endif
2416 break;
2417
2418 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2419 The latter is now a no-op, retained for compatibility only. If -dd is used,
2420 debugging subprocesses of the daemon is disabled. */
2421
2422 case 'd':
2423 if (Ustrcmp(argrest, "ropcr") == 0)
2424 {
2425 /* drop_cr = TRUE; */
2426 }
2427
2428 /* Use an intermediate variable so that we don't set debugging while
2429 decoding the debugging bits. */
2430
2431 else
2432 {
2433 unsigned int selector = D_default;
2434 debug_selector = 0;
2435 debug_file = NULL;
2436 if (*argrest == 'd')
2437 {
2438 debug_daemon = TRUE;
2439 argrest++;
2440 }
2441 if (*argrest != 0)
2442 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2443 debug_options_count, US"debug", 0);
2444 debug_selector = selector;
2445 }
2446 break;
2447
2448
2449 /* -E: This is a local error message. This option is not intended for
2450 external use at all, but is not restricted to trusted callers because it
2451 does no harm (just suppresses certain error messages) and if Exim is run
2452 not setuid root it won't always be trusted when it generates error
2453 messages using this option. If there is a message id following -E, point
2454 message_reference at it, for logging. */
2455
2456 case 'E':
2457 local_error_message = TRUE;
2458 if (mac_ismsgid(argrest)) message_reference = argrest;
2459 break;
2460
2461
2462 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2463 option, so it looks as if historically the -oex options are also callable
2464 without the leading -o. So we have to accept them. Before the switch,
2465 anything starting -oe has been converted to -e. Exim does not support all
2466 of the sendmail error options. */
2467
2468 case 'e':
2469 if (Ustrcmp(argrest, "e") == 0)
2470 {
2471 arg_error_handling = ERRORS_SENDER;
2472 errors_sender_rc = EXIT_SUCCESS;
2473 }
2474 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2475 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2476 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2477 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2478 else badarg = TRUE;
2479 break;
2480
2481
2482 /* -F: Set sender's full name, used instead of the gecos entry from
2483 the password file. Since users can usually alter their gecos entries,
2484 there's no security involved in using this instead. The data can follow
2485 the -F or be in the next argument. */
2486
2487 case 'F':
2488 if (*argrest == 0)
2489 {
2490 if(++i < argc) argrest = argv[i]; else
2491 { badarg = TRUE; break; }
2492 }
2493 originator_name = argrest;
2494 sender_name_forced = TRUE;
2495 break;
2496
2497
2498 /* -f: Set sender's address - this value is only actually used if Exim is
2499 run by a trusted user, or if untrusted_set_sender is set and matches the
2500 address, except that the null address can always be set by any user. The
2501 test for this happens later, when the value given here is ignored when not
2502 permitted. For an untrusted user, the actual sender is still put in Sender:
2503 if it doesn't match the From: header (unless no_local_from_check is set).
2504 The data can follow the -f or be in the next argument. The -r switch is an
2505 obsolete form of -f but since there appear to be programs out there that
2506 use anything that sendmail has ever supported, better accept it - the
2507 synonymizing is done before the switch above.
2508
2509 At this stage, we must allow domain literal addresses, because we don't
2510 know what the setting of allow_domain_literals is yet. Ditto for trailing
2511 dots and strip_trailing_dot. */
2512
2513 case 'f':
2514 {
2515 int start, end;
2516 uschar *errmess;
2517 if (*argrest == 0)
2518 {
2519 if (i+1 < argc) argrest = argv[++i]; else
2520 { badarg = TRUE; break; }
2521 }
2522 if (*argrest == 0)
2523 {
2524 sender_address = string_sprintf(""); /* Ensure writeable memory */
2525 }
2526 else
2527 {
2528 uschar *temp = argrest + Ustrlen(argrest) - 1;
2529 while (temp >= argrest && isspace(*temp)) temp--;
2530 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2531 allow_domain_literals = TRUE;
2532 strip_trailing_dot = TRUE;
2533 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2534 &sender_address_domain, TRUE);
2535 allow_domain_literals = FALSE;
2536 strip_trailing_dot = FALSE;
2537 if (sender_address == NULL)
2538 {
2539 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2540 return EXIT_FAILURE;
2541 }
2542 }
2543 sender_address_forced = TRUE;
2544 }
2545 break;
2546
2547 /* -G: sendmail invocation to specify that it's a gateway submission and
2548 sendmail may complain about problems instead of fixing them.
2549 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2550 not at this time complain about problems. */
2551
2552 case 'G':
2553 flag_G = TRUE;
2554 break;
2555
2556 /* -h: Set the hop count for an incoming message. Exim does not currently
2557 support this; it always computes it by counting the Received: headers.
2558 To put it in will require a change to the spool header file format. */
2559
2560 case 'h':
2561 if (*argrest == 0)
2562 {
2563 if(++i < argc) argrest = argv[i]; else
2564 { badarg = TRUE; break; }
2565 }
2566 if (!isdigit(*argrest)) badarg = TRUE;
2567 break;
2568
2569
2570 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2571 not to be documented for sendmail but mailx (at least) uses it) */
2572
2573 case 'i':
2574 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2575 break;
2576
2577
2578 /* -L: set the identifier used for syslog; equivalent to setting
2579 syslog_processname in the config file, but needs to be an admin option. */
2580
2581 case 'L':
2582 if (*argrest == '\0')
2583 {
2584 if(++i < argc) argrest = argv[i]; else
2585 { badarg = TRUE; break; }
2586 }
2587 sz = Ustrlen(argrest);
2588 if (sz > 32)
2589 {
2590 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2591 return EXIT_FAILURE;
2592 }
2593 if (sz < 1)
2594 {
2595 fprintf(stderr, "exim: the -L syslog name is too short\n");
2596 return EXIT_FAILURE;
2597 }
2598 cmdline_syslog_name = argrest;
2599 break;
2600
2601 case 'M':
2602 receiving_message = FALSE;
2603
2604 /* -MC: continue delivery of another message via an existing open
2605 file descriptor. This option is used for an internal call by the
2606 smtp transport when there is a pending message waiting to go to an
2607 address to which it has got a connection. Five subsequent arguments are
2608 required: transport name, host name, IP address, sequence number, and
2609 message_id. Transports may decline to create new processes if the sequence
2610 number gets too big. The channel is stdin. This (-MC) must be the last
2611 argument. There's a subsequent check that the real-uid is privileged.
2612
2613 If we are running in the test harness. delay for a bit, to let the process
2614 that set this one up complete. This makes for repeatability of the logging,
2615 etc. output. */
2616
2617 if (Ustrcmp(argrest, "C") == 0)
2618 {
2619 union sockaddr_46 interface_sock;
2620 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2621
2622 if (argc != i + 6)
2623 {
2624 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2625 return EXIT_FAILURE;
2626 }
2627
2628 if (msg_action_arg >= 0)
2629 {
2630 fprintf(stderr, "exim: incompatible arguments\n");
2631 return EXIT_FAILURE;
2632 }
2633
2634 continue_transport = argv[++i];
2635 continue_hostname = argv[++i];
2636 continue_host_address = argv[++i];
2637 continue_sequence = Uatoi(argv[++i]);
2638 msg_action = MSG_DELIVER;
2639 msg_action_arg = ++i;
2640 forced_delivery = TRUE;
2641 queue_run_pid = passed_qr_pid;
2642 queue_run_pipe = passed_qr_pipe;
2643
2644 if (!mac_ismsgid(argv[i]))
2645 {
2646 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2647 argv[i]);
2648 return EXIT_FAILURE;
2649 }
2650
2651 /* Set up $sending_ip_address and $sending_port */
2652
2653 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2654 &size) == 0)
2655 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2656 &sending_port);
2657 else
2658 {
2659 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2660 strerror(errno));
2661 return EXIT_FAILURE;
2662 }
2663
2664 if (running_in_test_harness) millisleep(500);
2665 break;
2666 }
2667
2668 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2669 precedes -MC (see above). The flag indicates that the host to which
2670 Exim is connected has accepted an AUTH sequence. */
2671
2672 else if (Ustrcmp(argrest, "CA") == 0)
2673 {
2674 smtp_authenticated = TRUE;
2675 break;
2676 }
2677
2678 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2679 that exim is connected to supports the esmtp extension DSN */
2680 else if (Ustrcmp(argrest, "CD") == 0)
2681 {
2682 smtp_use_dsn = TRUE;
2683 break;
2684 }
2685
2686 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2687 it preceded -MC (see above) */
2688
2689 else if (Ustrcmp(argrest, "CP") == 0)
2690 {
2691 smtp_use_pipelining = TRUE;
2692 break;
2693 }
2694
2695 /* -MCQ: pass on the pid of the queue-running process that started
2696 this chain of deliveries and the fd of its synchronizing pipe; this
2697 is useful only when it precedes -MC (see above) */
2698
2699 else if (Ustrcmp(argrest, "CQ") == 0)
2700 {
2701 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2702 else badarg = TRUE;
2703 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2704 else badarg = TRUE;
2705 break;
2706 }
2707
2708 /* -MCS: set the smtp_use_size flag; this is useful only when it
2709 precedes -MC (see above) */
2710
2711 else if (Ustrcmp(argrest, "CS") == 0)
2712 {
2713 smtp_use_size = TRUE;
2714 break;
2715 }
2716
2717 /* -MCT: set the tls_offered flag; this is useful only when it
2718 precedes -MC (see above). The flag indicates that the host to which
2719 Exim is connected has offered TLS support. */
2720
2721 #ifdef SUPPORT_TLS
2722 else if (Ustrcmp(argrest, "CT") == 0)
2723 {
2724 tls_offered = TRUE;
2725 break;
2726 }
2727 #endif
2728
2729 /* -M[x]: various operations on the following list of message ids:
2730 -M deliver the messages, ignoring next retry times and thawing
2731 -Mc deliver the messages, checking next retry times, no thawing
2732 -Mf freeze the messages
2733 -Mg give up on the messages
2734 -Mt thaw the messages
2735 -Mrm remove the messages
2736 In the above cases, this must be the last option. There are also the
2737 following options which are followed by a single message id, and which
2738 act on that message. Some of them use the "recipient" addresses as well.
2739 -Mar add recipient(s)
2740 -Mmad mark all recipients delivered
2741 -Mmd mark recipients(s) delivered
2742 -Mes edit sender
2743 -Mset load a message for use with -be
2744 -Mvb show body
2745 -Mvc show copy (of whole message, in RFC 2822 format)
2746 -Mvh show header
2747 -Mvl show log
2748 */
2749
2750 else if (*argrest == 0)
2751 {
2752 msg_action = MSG_DELIVER;
2753 forced_delivery = deliver_force_thaw = TRUE;
2754 }
2755 else if (Ustrcmp(argrest, "ar") == 0)
2756 {
2757 msg_action = MSG_ADD_RECIPIENT;
2758 one_msg_action = TRUE;
2759 }
2760 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2761 else if (Ustrcmp(argrest, "es") == 0)
2762 {
2763 msg_action = MSG_EDIT_SENDER;
2764 one_msg_action = TRUE;
2765 }
2766 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2767 else if (Ustrcmp(argrest, "g") == 0)
2768 {
2769 msg_action = MSG_DELIVER;
2770 deliver_give_up = TRUE;
2771 }
2772 else if (Ustrcmp(argrest, "mad") == 0)
2773 {
2774 msg_action = MSG_MARK_ALL_DELIVERED;
2775 }
2776 else if (Ustrcmp(argrest, "md") == 0)
2777 {
2778 msg_action = MSG_MARK_DELIVERED;
2779 one_msg_action = TRUE;
2780 }
2781 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2782 else if (Ustrcmp(argrest, "set") == 0)
2783 {
2784 msg_action = MSG_LOAD;
2785 one_msg_action = TRUE;
2786 }
2787 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2788 else if (Ustrcmp(argrest, "vb") == 0)
2789 {
2790 msg_action = MSG_SHOW_BODY;
2791 one_msg_action = TRUE;
2792 }
2793 else if (Ustrcmp(argrest, "vc") == 0)
2794 {
2795 msg_action = MSG_SHOW_COPY;
2796 one_msg_action = TRUE;
2797 }
2798 else if (Ustrcmp(argrest, "vh") == 0)
2799 {
2800 msg_action = MSG_SHOW_HEADER;
2801 one_msg_action = TRUE;
2802 }
2803 else if (Ustrcmp(argrest, "vl") == 0)
2804 {
2805 msg_action = MSG_SHOW_LOG;
2806 one_msg_action = TRUE;
2807 }
2808 else { badarg = TRUE; break; }
2809
2810 /* All the -Mxx options require at least one message id. */
2811
2812 msg_action_arg = i + 1;
2813 if (msg_action_arg >= argc)
2814 {
2815 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2816 return EXIT_FAILURE;
2817 }
2818
2819 /* Some require only message ids to follow */
2820
2821 if (!one_msg_action)
2822 {
2823 int j;
2824 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2825 {
2826 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2827 argv[j], arg);
2828 return EXIT_FAILURE;
2829 }
2830 goto END_ARG; /* Remaining args are ids */
2831 }
2832
2833 /* Others require only one message id, possibly followed by addresses,
2834 which will be handled as normal arguments. */
2835
2836 else
2837 {
2838 if (!mac_ismsgid(argv[msg_action_arg]))
2839 {
2840 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2841 argv[msg_action_arg], arg);
2842 return EXIT_FAILURE;
2843 }
2844 i++;
2845 }
2846 break;
2847
2848
2849 /* Some programs seem to call the -om option without the leading o;
2850 for sendmail it askes for "me too". Exim always does this. */
2851
2852 case 'm':
2853 if (*argrest != 0) badarg = TRUE;
2854 break;
2855
2856
2857 /* -N: don't do delivery - a debugging option that stops transports doing
2858 their thing. It implies debugging at the D_v level. */
2859
2860 case 'N':
2861 if (*argrest == 0)
2862 {
2863 dont_deliver = TRUE;
2864 debug_selector |= D_v;
2865 debug_file = stderr;
2866 }
2867 else badarg = TRUE;
2868 break;
2869
2870
2871 /* -n: This means "don't alias" in sendmail, apparently.
2872 For normal invocations, it has no effect.
2873 It may affect some other options. */
2874
2875 case 'n':
2876 flag_n = TRUE;
2877 break;
2878
2879 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2880 option to the specified value. This form uses long names. We need to handle
2881 -O option=value and -Ooption=value. */
2882
2883 case 'O':
2884 if (*argrest == 0)
2885 {
2886 if (++i >= argc)
2887 {
2888 fprintf(stderr, "exim: string expected after -O\n");
2889 exit(EXIT_FAILURE);
2890 }
2891 }
2892 break;
2893
2894 case 'o':
2895
2896 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2897 file" option). */
2898
2899 if (*argrest == 'A')
2900 {
2901 alias_arg = argrest + 1;
2902 if (alias_arg[0] == 0)
2903 {
2904 if (i+1 < argc) alias_arg = argv[++i]; else
2905 {
2906 fprintf(stderr, "exim: string expected after -oA\n");
2907 exit(EXIT_FAILURE);
2908 }
2909 }
2910 }
2911
2912 /* -oB: Set a connection message max value for remote deliveries */
2913
2914 else if (*argrest == 'B')
2915 {
2916 uschar *p = argrest + 1;
2917 if (p[0] == 0)
2918 {
2919 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2920 {
2921 connection_max_messages = 1;
2922 p = NULL;
2923 }
2924 }
2925
2926 if (p != NULL)
2927 {
2928 if (!isdigit(*p))
2929 {
2930 fprintf(stderr, "exim: number expected after -oB\n");
2931 exit(EXIT_FAILURE);
2932 }
2933 connection_max_messages = Uatoi(p);
2934 }
2935 }
2936
2937 /* -odb: background delivery */
2938
2939 else if (Ustrcmp(argrest, "db") == 0)
2940 {
2941 synchronous_delivery = FALSE;
2942 arg_queue_only = FALSE;
2943 queue_only_set = TRUE;
2944 }
2945
2946 /* -odf: foreground delivery (smail-compatible option); same effect as
2947 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2948 */
2949
2950 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2951 {
2952 synchronous_delivery = TRUE;
2953 arg_queue_only = FALSE;
2954 queue_only_set = TRUE;
2955 }
2956
2957 /* -odq: queue only */
2958
2959 else if (Ustrcmp(argrest, "dq") == 0)
2960 {
2961 synchronous_delivery = FALSE;
2962 arg_queue_only = TRUE;
2963 queue_only_set = TRUE;
2964 }
2965
2966 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2967 but no remote delivery */
2968
2969 else if (Ustrcmp(argrest, "dqs") == 0)
2970 {
2971 queue_smtp = TRUE;
2972 arg_queue_only = FALSE;
2973 queue_only_set = TRUE;
2974 }
2975
2976 /* -oex: Sendmail error flags. As these are also accepted without the
2977 leading -o prefix, for compatibility with vacation and other callers,
2978 they are handled with -e above. */
2979
2980 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2981 -oitrue: Another sendmail syntax for the same */
2982
2983 else if (Ustrcmp(argrest, "i") == 0 ||
2984 Ustrcmp(argrest, "itrue") == 0)
2985 dot_ends = FALSE;
2986
2987 /* -oM*: Set various characteristics for an incoming message; actually
2988 acted on for trusted callers only. */
2989
2990 else if (*argrest == 'M')
2991 {
2992 if (i+1 >= argc)
2993 {
2994 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2995 exit(EXIT_FAILURE);
2996 }
2997
2998 /* -oMa: Set sender host address */
2999
3000 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3001
3002 /* -oMaa: Set authenticator name */
3003
3004 else if (Ustrcmp(argrest, "Maa") == 0)
3005 sender_host_authenticated = argv[++i];
3006
3007 /* -oMas: setting authenticated sender */
3008
3009 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3010
3011 /* -oMai: setting authenticated id */
3012
3013 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3014
3015 /* -oMi: Set incoming interface address */
3016
3017 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3018
3019 /* -oMm: Message reference */
3020
3021 else if (Ustrcmp(argrest, "Mm") == 0)
3022 {
3023 if (!mac_ismsgid(argv[i+1]))
3024 {
3025 fprintf(stderr,"-oMm must be a valid message ID\n");
3026 exit(EXIT_FAILURE);
3027 }
3028 if (!trusted_config)
3029 {
3030 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3031 exit(EXIT_FAILURE);
3032 }
3033 message_reference = argv[++i];
3034 }
3035
3036 /* -oMr: Received protocol */
3037
3038 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3039
3040 /* -oMs: Set sender host name */
3041
3042 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3043
3044 /* -oMt: Set sender ident */
3045
3046 else if (Ustrcmp(argrest, "Mt") == 0)
3047 {
3048 sender_ident_set = TRUE;
3049 sender_ident = argv[++i];
3050 }
3051
3052 /* Else a bad argument */
3053
3054 else
3055 {
3056 badarg = TRUE;
3057 break;
3058 }
3059 }
3060
3061 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3062 seem to call this as -m (undocumented), so that is also accepted (see
3063 above). */
3064
3065 else if (Ustrcmp(argrest, "m") == 0) {}
3066
3067 /* -oo: An ancient flag for old-style addresses which still seems to
3068 crop up in some calls (see in SCO). */
3069
3070 else if (Ustrcmp(argrest, "o") == 0) {}
3071
3072 /* -oP <name>: set pid file path for daemon */
3073
3074 else if (Ustrcmp(argrest, "P") == 0)
3075 override_pid_file_path = argv[++i];
3076
3077 /* -or <n>: set timeout for non-SMTP acceptance
3078 -os <n>: set timeout for SMTP acceptance */
3079
3080 else if (*argrest == 'r' || *argrest == 's')
3081 {
3082 int *tp = (*argrest == 'r')?
3083 &arg_receive_timeout : &arg_smtp_receive_timeout;
3084 if (argrest[1] == 0)
3085 {
3086 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3087 }
3088 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3089 if (*tp < 0)
3090 {
3091 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3092 exit(EXIT_FAILURE);
3093 }
3094 }
3095
3096 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3097
3098 else if (Ustrcmp(argrest, "X") == 0)
3099 override_local_interfaces = argv[++i];
3100
3101 /* Unknown -o argument */
3102
3103 else badarg = TRUE;
3104 break;
3105
3106
3107 /* -ps: force Perl startup; -pd force delayed Perl startup */
3108
3109 case 'p':
3110 #ifdef EXIM_PERL
3111 if (*argrest == 's' && argrest[1] == 0)
3112 {
3113 perl_start_option = 1;
3114 break;
3115 }
3116 if (*argrest == 'd' && argrest[1] == 0)
3117 {
3118 perl_start_option = -1;
3119 break;
3120 }
3121 #endif
3122
3123 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3124 which sets the host protocol and host name */
3125
3126 if (*argrest == 0)
3127 {
3128 if (i+1 < argc) argrest = argv[++i]; else
3129 { badarg = TRUE; break; }
3130 }
3131
3132 if (*argrest != 0)
3133 {
3134 uschar *hn = Ustrchr(argrest, ':');
3135 if (hn == NULL)
3136 {
3137 received_protocol = argrest;
3138 }
3139 else
3140 {
3141 received_protocol = string_copyn(argrest, hn - argrest);
3142 sender_host_name = hn + 1;
3143 }
3144 }
3145 break;
3146
3147
3148 case 'q':
3149 receiving_message = FALSE;
3150 if (queue_interval >= 0)
3151 {
3152 fprintf(stderr, "exim: -q specified more than once\n");
3153 exit(EXIT_FAILURE);
3154 }
3155
3156 /* -qq...: Do queue runs in a 2-stage manner */
3157
3158 if (*argrest == 'q')
3159 {
3160 queue_2stage = TRUE;
3161 argrest++;
3162 }
3163
3164 /* -qi...: Do only first (initial) deliveries */
3165
3166 if (*argrest == 'i')
3167 {
3168 queue_run_first_delivery = TRUE;
3169 argrest++;
3170 }
3171
3172 /* -qf...: Run the queue, forcing deliveries
3173 -qff..: Ditto, forcing thawing as well */
3174
3175 if (*argrest == 'f')
3176 {
3177 queue_run_force = TRUE;
3178 if (*(++argrest) == 'f')
3179 {
3180 deliver_force_thaw = TRUE;
3181 argrest++;
3182 }
3183 }
3184
3185 /* -q[f][f]l...: Run the queue only on local deliveries */
3186
3187 if (*argrest == 'l')
3188 {
3189 queue_run_local = TRUE;
3190 argrest++;
3191 }
3192
3193 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3194 optionally starting from a given message id. */
3195
3196 if (*argrest == 0 &&
3197 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3198 {
3199 queue_interval = 0;
3200 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3201 start_queue_run_id = argv[++i];
3202 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3203 stop_queue_run_id = argv[++i];
3204 }
3205
3206 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3207 optionally local only. */
3208
3209 else
3210 {
3211 if (*argrest != 0)
3212 queue_interval = readconf_readtime(argrest, 0, FALSE);
3213 else
3214 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3215 if (queue_interval <= 0)
3216 {
3217 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3218 exit(EXIT_FAILURE);
3219 }
3220 }
3221 break;
3222
3223
3224 case 'R': /* Synonymous with -qR... */
3225 receiving_message = FALSE;
3226
3227 /* -Rf: As -R (below) but force all deliveries,
3228 -Rff: Ditto, but also thaw all frozen messages,
3229 -Rr: String is regex
3230 -Rrf: Regex and force
3231 -Rrff: Regex and force and thaw
3232
3233 in all cases provided there are no further characters in this
3234 argument. */
3235
3236 if (*argrest != 0)
3237 {
3238 int i;
3239 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3240 {
3241 if (Ustrcmp(argrest, rsopts[i]) == 0)
3242 {
3243 if (i != 2) queue_run_force = TRUE;
3244 if (i >= 2) deliver_selectstring_regex = TRUE;
3245 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3246 argrest += Ustrlen(rsopts[i]);
3247 }
3248 }
3249 }
3250
3251 /* -R: Set string to match in addresses for forced queue run to
3252 pick out particular messages. */
3253
3254 if (*argrest == 0)
3255 {
3256 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3257 {
3258 fprintf(stderr, "exim: string expected after -R\n");
3259 exit(EXIT_FAILURE);
3260 }
3261 }
3262 else deliver_selectstring = argrest;
3263 break;
3264
3265
3266 /* -r: an obsolete synonym for -f (see above) */
3267
3268
3269 /* -S: Like -R but works on sender. */
3270
3271 case 'S': /* Synonymous with -qS... */
3272 receiving_message = FALSE;
3273
3274 /* -Sf: As -S (below) but force all deliveries,
3275 -Sff: Ditto, but also thaw all frozen messages,
3276 -Sr: String is regex
3277 -Srf: Regex and force
3278 -Srff: Regex and force and thaw
3279
3280 in all cases provided there are no further characters in this
3281 argument. */
3282
3283 if (*argrest != 0)
3284 {
3285 int i;
3286 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3287 {
3288 if (Ustrcmp(argrest, rsopts[i]) == 0)
3289 {
3290 if (i != 2) queue_run_force = TRUE;
3291 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3292 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3293 argrest += Ustrlen(rsopts[i]);
3294 }
3295 }
3296 }
3297
3298 /* -S: Set string to match in addresses for forced queue run to
3299 pick out particular messages. */
3300
3301 if (*argrest == 0)
3302 {
3303 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3304 {
3305 fprintf(stderr, "exim: string expected after -S\n");
3306 exit(EXIT_FAILURE);
3307 }
3308 }
3309 else deliver_selectstring_sender = argrest;
3310 break;
3311
3312 /* -Tqt is an option that is exclusively for use by the testing suite.
3313 It is not recognized in other circumstances. It allows for the setting up
3314 of explicit "queue times" so that various warning/retry things can be
3315 tested. Otherwise variability of clock ticks etc. cause problems. */
3316
3317 case 'T':
3318 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3319 fudged_queue_times = argv[++i];
3320 else badarg = TRUE;
3321 break;
3322
3323
3324 /* -t: Set flag to extract recipients from body of message. */
3325
3326 case 't':
3327 if (*argrest == 0) extract_recipients = TRUE;
3328
3329 /* -ti: Set flag to extract recipients from body of message, and also
3330 specify that dot does not end the message. */
3331
3332 else if (Ustrcmp(argrest, "i") == 0)
3333 {
3334 extract_recipients = TRUE;
3335 dot_ends = FALSE;
3336 }
3337
3338 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3339
3340 #ifdef SUPPORT_TLS
3341 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3342 #endif
3343
3344 else badarg = TRUE;
3345 break;
3346
3347
3348 /* -U: This means "initial user submission" in sendmail, apparently. The
3349 doc claims that in future sendmail may refuse syntactically invalid
3350 messages instead of fixing them. For the moment, we just ignore it. */
3351
3352 case 'U':
3353 break;
3354
3355
3356 /* -v: verify things - this is a very low-level debugging */
3357
3358 case 'v':
3359 if (*argrest == 0)
3360 {
3361 debug_selector |= D_v;
3362 debug_file = stderr;
3363 }
3364 else badarg = TRUE;
3365 break;
3366
3367
3368 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3369
3370 The -x flag tells the sendmail command that mail from a local
3371 mail program has National Language Support (NLS) extended characters
3372 in the body of the mail item. The sendmail command can send mail with
3373 extended NLS characters across networks that normally corrupts these
3374 8-bit characters.
3375
3376 As Exim is 8-bit clean, it just ignores this flag. */
3377
3378 case 'x':
3379 if (*argrest != 0) badarg = TRUE;
3380 break;
3381
3382 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3383 logs to that file. We swallow the parameter and otherwise ignore it. */
3384
3385 case 'X':
3386 if (*argrest == '\0')
3387 if (++i >= argc)
3388 {
3389 fprintf(stderr, "exim: string expected after -X\n");
3390 exit(EXIT_FAILURE);
3391 }
3392 break;
3393
3394 case 'z':
3395 if (*argrest == '\0')
3396 if (++i < argc) log_oneline = argv[i]; else
3397 {
3398 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3399 exit(EXIT_FAILURE);
3400 }
3401 break;
3402
3403 /* All other initial characters are errors */
3404
3405 default:
3406 badarg = TRUE;
3407 break;
3408 } /* End of high-level switch statement */
3409
3410 /* Failed to recognize the option, or syntax error */
3411
3412 if (badarg)
3413 {
3414 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3415 "option %s\n", arg);
3416 exit(EXIT_FAILURE);
3417 }
3418 }
3419
3420
3421 /* If -R or -S have been specified without -q, assume a single queue run. */
3422
3423 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3424 queue_interval < 0) queue_interval = 0;
3425
3426
3427 END_ARG:
3428 /* If usage_wanted is set we call the usage function - which never returns */
3429 if (usage_wanted) exim_usage(called_as);
3430
3431 /* Arguments have been processed. Check for incompatibilities. */
3432 if ((
3433 (smtp_input || extract_recipients || recipients_arg < argc) &&
3434 (daemon_listen || queue_interval >= 0 || bi_option ||
3435 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3436 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3437 ) ||
3438 (
3439 msg_action_arg > 0 &&
3440 (daemon_listen || queue_interval >= 0 || list_options ||
3441 (checking && msg_action != MSG_LOAD) ||
3442 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3443 ) ||
3444 (
3445 (daemon_listen || queue_interval >= 0) &&
3446 (sender_address != NULL || list_options || list_queue || checking ||
3447 bi_option)
3448 ) ||
3449 (
3450 daemon_listen && queue_interval == 0
3451 ) ||
3452 (
3453 inetd_wait_mode && queue_interval >= 0
3454 ) ||
3455 (
3456 list_options &&
3457 (checking || smtp_input || extract_recipients ||
3458 filter_test != FTEST_NONE || bi_option)
3459 ) ||
3460 (
3461 verify_address_mode &&
3462 (address_test_mode || smtp_input || extract_recipients ||
3463 filter_test != FTEST_NONE || bi_option)
3464 ) ||
3465 (
3466 address_test_mode && (smtp_input || extract_recipients ||
3467 filter_test != FTEST_NONE || bi_option)
3468 ) ||
3469 (
3470 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3471 extract_recipients)
3472 ) ||
3473 (
3474 deliver_selectstring != NULL && queue_interval < 0
3475 ) ||
3476 (
3477 msg_action == MSG_LOAD &&
3478 (!expansion_test || expansion_test_message != NULL)
3479 )
3480 )
3481 {
3482 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3483 exit(EXIT_FAILURE);
3484 }
3485
3486 /* If debugging is set up, set the file and the file descriptor to pass on to
3487 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3488 to run in the foreground. */
3489
3490 if (debug_selector != 0)
3491 {
3492 debug_file = stderr;
3493 debug_fd = fileno(debug_file);
3494 background_daemon = FALSE;
3495 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3496 if (debug_selector != D_v) /* -v only doesn't show this */
3497 {
3498 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3499 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3500 debug_selector);
3501 if (!version_printed)
3502 show_whats_supported(stderr);
3503 }
3504 }
3505
3506 /* When started with root privilege, ensure that the limits on the number of
3507 open files and the number of processes (where that is accessible) are
3508 sufficiently large, or are unset, in case Exim has been called from an
3509 environment where the limits are screwed down. Not all OS have the ability to
3510 change some of these limits. */
3511
3512 if (unprivileged)
3513 {
3514 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3515 }
3516 else
3517 {
3518 struct rlimit rlp;
3519
3520 #ifdef RLIMIT_NOFILE
3521 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3522 {
3523 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3524 strerror(errno));
3525 rlp.rlim_cur = rlp.rlim_max = 0;
3526 }
3527
3528 /* I originally chose 1000 as a nice big number that was unlikely to
3529 be exceeded. It turns out that some older OS have a fixed upper limit of
3530 256. */
3531
3532 if (rlp.rlim_cur < 1000)
3533 {
3534 rlp.rlim_cur = rlp.rlim_max = 1000;
3535 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3536 {
3537 rlp.rlim_cur = rlp.rlim_max = 256;
3538 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3539 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3540 strerror(errno));
3541 }
3542 }
3543 #endif
3544
3545 #ifdef RLIMIT_NPROC
3546 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3547 {
3548 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3549 strerror(errno));
3550 rlp.rlim_cur = rlp.rlim_max = 0;
3551 }
3552
3553 #ifdef RLIM_INFINITY
3554 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3555 {
3556 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3557 #else
3558 if (rlp.rlim_cur < 1000)
3559 {
3560 rlp.rlim_cur = rlp.rlim_max = 1000;
3561 #endif
3562 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3563 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3564 strerror(errno));
3565 }
3566 #endif
3567 }
3568
3569 /* Exim is normally entered as root (but some special configurations are
3570 possible that don't do this). However, it always spins off sub-processes that
3571 set their uid and gid as required for local delivery. We don't want to pass on
3572 any extra groups that root may belong to, so we want to get rid of them all at
3573 this point.
3574
3575 We need to obey setgroups() at this stage, before possibly giving up root
3576 privilege for a changed configuration file, but later on we might need to
3577 check on the additional groups for the admin user privilege - can't do that
3578 till after reading the config, which might specify the exim gid. Therefore,
3579 save the group list here first. */
3580
3581 group_count = getgroups(NGROUPS_MAX, group_list);
3582 if (group_count < 0)
3583 {
3584 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3585 exit(EXIT_FAILURE);
3586 }
3587
3588 /* There is a fundamental difference in some BSD systems in the matter of
3589 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3590 known not to be different. On the "different" systems there is a single group
3591 list, and the first entry in it is the current group. On all other versions of
3592 Unix there is a supplementary group list, which is in *addition* to the current
3593 group. Consequently, to get rid of all extraneous groups on a "standard" system
3594 you pass over 0 groups to setgroups(), while on a "different" system you pass
3595 over a single group - the current group, which is always the first group in the
3596 list. Calling setgroups() with zero groups on a "different" system results in
3597 an error return. The following code should cope with both types of system.
3598
3599 However, if this process isn't running as root, setgroups() can't be used
3600 since you have to be root to run it, even if throwing away groups. Not being
3601 root here happens only in some unusual configurations. We just ignore the
3602 error. */
3603
3604 if (setgroups(0, NULL) != 0)
3605 {
3606 if (setgroups(1, group_list) != 0 && !unprivileged)
3607 {
3608 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3609 exit(EXIT_FAILURE);
3610 }
3611 }
3612
3613 /* If the configuration file name has been altered by an argument on the
3614 command line (either a new file name or a macro definition) and the caller is
3615 not root, or if this is a filter testing run, remove any setuid privilege the
3616 program has and run as the underlying user.
3617
3618 The exim user is locked out of this, which severely restricts the use of -C
3619 for some purposes.
3620
3621 Otherwise, set the real ids to the effective values (should be root unless run
3622 from inetd, which it can either be root or the exim uid, if one is configured).
3623
3624 There is a private mechanism for bypassing some of this, in order to make it
3625 possible to test lots of configurations automatically, without having either to
3626 recompile each time, or to patch in an actual configuration file name and other
3627 values (such as the path name). If running in the test harness, pretend that
3628 configuration file changes and macro definitions haven't happened. */
3629
3630 if (( /* EITHER */
3631 (!trusted_config || /* Config changed, or */
3632 !macros_trusted()) && /* impermissible macros and */
3633 real_uid != root_uid && /* Not root, and */
3634 !running_in_test_harness /* Not fudged */
3635 ) || /* OR */
3636 expansion_test /* expansion testing */
3637 || /* OR */
3638 filter_test != FTEST_NONE) /* Filter testing */
3639 {
3640 setgroups(group_count, group_list);
3641 exim_setugid(real_uid, real_gid, FALSE,
3642 US"-C, -D, -be or -bf forces real uid");
3643 removed_privilege = TRUE;
3644
3645 /* In the normal case when Exim is called like this, stderr is available
3646 and should be used for any logging information because attempts to write
3647 to the log will usually fail. To arrange this, we unset really_exim. However,
3648 if no stderr is available there is no point - we might as well have a go
3649 at the log (if it fails, syslog will be written).
3650
3651 Note that if the invoker is Exim, the logs remain available. Messing with
3652 this causes unlogged successful deliveries. */
3653
3654 if ((log_stderr != NULL) && (real_uid != exim_uid))
3655 really_exim = FALSE;
3656 }
3657
3658 /* Privilege is to be retained for the moment. It may be dropped later,
3659 depending on the job that this Exim process has been asked to do. For now, set
3660 the real uid to the effective so that subsequent re-execs of Exim are done by a
3661 privileged user. */
3662
3663 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3664
3665 /* If testing a filter, open the file(s) now, before wasting time doing other
3666 setups and reading the message. */
3667
3668 if ((filter_test & FTEST_SYSTEM) != 0)
3669 {
3670 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3671 if (filter_sfd < 0)
3672 {
3673 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3674 strerror(errno));
3675 return EXIT_FAILURE;
3676 }
3677 }
3678
3679 if ((filter_test & FTEST_USER) != 0)
3680 {
3681 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3682 if (filter_ufd < 0)
3683 {
3684 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3685 strerror(errno));
3686 return EXIT_FAILURE;
3687 }
3688 }
3689
3690 /* Initialise lookup_list
3691 If debugging, already called above via version reporting.
3692 In either case, we initialise the list of available lookups while running
3693 as root. All dynamically modules are loaded from a directory which is
3694 hard-coded into the binary and is code which, if not a module, would be
3695 part of Exim already. Ability to modify the content of the directory
3696 is equivalent to the ability to modify a setuid binary!
3697
3698 This needs to happen before we read the main configuration. */
3699 init_lookup_list();
3700
3701 /* Read the main runtime configuration data; this gives up if there
3702 is a failure. It leaves the configuration file open so that the subsequent
3703 configuration data for delivery can be read if needed. */
3704
3705 readconf_main();
3706
3707 /* If an action on specific messages is requested, or if a daemon or queue
3708 runner is being started, we need to know if Exim was called by an admin user.
3709 This is the case if the real user is root or exim, or if the real group is
3710 exim, or if one of the supplementary groups is exim or a group listed in
3711 admin_groups. We don't fail all message actions immediately if not admin_user,
3712 since some actions can be performed by non-admin users. Instead, set admin_user
3713 for later interrogation. */
3714
3715 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3716 admin_user = TRUE;
3717 else
3718 {
3719 int i, j;
3720 for (i = 0; i < group_count; i++)
3721 {
3722 if (group_list[i] == exim_gid) admin_user = TRUE;
3723 else if (admin_groups != NULL)
3724 {
3725 for (j = 1; j <= (int)(admin_groups[0]); j++)
3726 if (admin_groups[j] == group_list[i])
3727 { admin_user = TRUE; break; }
3728 }
3729 if (admin_user) break;
3730 }
3731 }
3732
3733 /* Another group of privileged users are the trusted users. These are root,
3734 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3735 are permitted to specify sender_addresses with -f on the command line, and
3736 other message parameters as well. */
3737
3738 if (real_uid == root_uid || real_uid == exim_uid)
3739 trusted_caller = TRUE;
3740 else
3741 {
3742 int i, j;
3743
3744 if (trusted_users != NULL)
3745 {
3746 for (i = 1; i <= (int)(trusted_users[0]); i++)
3747 if (trusted_users[i] == real_uid)
3748 { trusted_caller = TRUE; break; }
3749 }
3750
3751 if (!trusted_caller && trusted_groups != NULL)
3752 {
3753 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3754 {
3755 if (trusted_groups[i] == real_gid)
3756 trusted_caller = TRUE;
3757 else for (j = 0; j < group_count; j++)
3758 {
3759 if (trusted_groups[i] == group_list[j])
3760 { trusted_caller = TRUE; break; }
3761 }
3762 if (trusted_caller) break;
3763 }
3764 }
3765 }
3766
3767 /* Handle the decoding of logging options. */
3768
3769 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3770 log_selector_string, log_options, log_options_count, US"log", 0);
3771
3772 DEBUG(D_any)
3773 {
3774 debug_printf("configuration file is %s\n", config_main_filename);
3775 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3776 log_extra_selector);
3777 }
3778
3779 /* If domain literals are not allowed, check the sender address that was
3780 supplied with -f. Ditto for a stripped trailing dot. */
3781
3782 if (sender_address != NULL)
3783 {
3784 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3785 {
3786 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3787 "allowed\n", sender_address);
3788 return EXIT_FAILURE;
3789 }
3790 if (f_end_dot && !strip_trailing_dot)
3791 {
3792 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3793 "(trailing dot not allowed)\n", sender_address);
3794 return EXIT_FAILURE;
3795 }
3796 }
3797
3798 /* See if an admin user overrode our logging. */
3799
3800 if (cmdline_syslog_name != NULL)
3801 {
3802 if (admin_user)
3803 {
3804 syslog_processname = cmdline_syslog_name;
3805 log_file_path = string_copy(CUS"syslog");
3806 }
3807 else
3808 {
3809 /* not a panic, non-privileged users should not be able to spam paniclog */
3810 fprintf(stderr,
3811 "exim: you lack sufficient privilege to specify syslog process name\n");
3812 return EXIT_FAILURE;
3813 }
3814 }
3815
3816 /* Paranoia check of maximum lengths of certain strings. There is a check
3817 on the length of the log file path in log.c, which will come into effect
3818 if there are any calls to write the log earlier than this. However, if we
3819 get this far but the string is very long, it is better to stop now than to
3820 carry on and (e.g.) receive a message and then have to collapse. The call to
3821 log_write() from here will cause the ultimate panic collapse if the complete
3822 file name exceeds the buffer length. */
3823
3824 if (Ustrlen(log_file_path) > 200)
3825 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3826 "log_file_path is longer than 200 chars: aborting");
3827
3828 if (Ustrlen(pid_file_path) > 200)
3829 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3830 "pid_file_path is longer than 200 chars: aborting");
3831
3832 if (Ustrlen(spool_directory) > 200)
3833 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3834 "spool_directory is longer than 200 chars: aborting");
3835
3836 /* Length check on the process name given to syslog for its TAG field,
3837 which is only permitted to be 32 characters or less. See RFC 3164. */
3838
3839 if (Ustrlen(syslog_processname) > 32)
3840 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3841 "syslog_processname is longer than 32 chars: aborting");
3842
3843 if (log_oneline)
3844 {
3845 if (admin_user)
3846 {
3847 log_write(0, LOG_MAIN, "%s", log_oneline);
3848 return EXIT_SUCCESS;
3849 }
3850 else
3851 return EXIT_FAILURE;
3852 }
3853
3854 /* In some operating systems, the environment variable TMPDIR controls where
3855 temporary files are created; Exim doesn't use these (apart from when delivering
3856 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3857 If TMPDIR is found in the environment, reset it to the value defined in the
3858 TMPDIR macro, if this macro is defined. */
3859
3860 #ifdef TMPDIR
3861 {
3862 uschar **p;
3863 for (p = USS environ; *p != NULL; p++)
3864 {
3865 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3866 Ustrcmp(*p+7, TMPDIR) != 0)
3867 {
3868 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3869 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3870 *p = newp;
3871 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3872 }
3873 }
3874 }
3875 #endif
3876
3877 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3878 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3879 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3880 called by a user who has set the TZ variable. This then affects the timestamps
3881 in log files and in Received: headers, and any created Date: header lines. The
3882 required timezone is settable in the configuration file, so nothing can be done
3883 about this earlier - but hopefully nothing will normally be logged earlier than
3884 this. We have to make a new environment if TZ is wrong, but don't bother if
3885 timestamps_utc is set, because then all times are in UTC anyway. */
3886
3887 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3888 {
3889 timestamps_utc = TRUE;
3890 }
3891 else
3892 {
3893 uschar *envtz = US getenv("TZ");
3894 if ((envtz == NULL && timezone_string != NULL) ||
3895 (envtz != NULL &&
3896 (timezone_string == NULL ||
3897 Ustrcmp(timezone_string, envtz) != 0)))
3898 {
3899 uschar **p = USS environ;
3900 uschar **new;
3901 uschar **newp;
3902 int count = 0;
3903 while (*p++ != NULL) count++;
3904 if (envtz == NULL) count++;
3905 newp = new = malloc(sizeof(uschar *) * (count + 1));
3906 for (p = USS environ; *p != NULL; p++)
3907 {
3908 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3909 *newp++ = *p;
3910 }
3911 if (timezone_string != NULL)
3912 {
3913 *newp = malloc(Ustrlen(timezone_string) + 4);
3914 sprintf(CS *newp++, "TZ=%s", timezone_string);
3915 }
3916 *newp = NULL;
3917 environ = CSS new;
3918 tzset();
3919 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3920 tod_stamp(tod_log));
3921 }
3922 }
3923
3924 /* Handle the case when we have removed the setuid privilege because of -C or
3925 -D. This means that the caller of Exim was not root.
3926
3927 There is a problem if we were running as the Exim user. The sysadmin may
3928 expect this case to retain privilege because "the binary was called by the
3929 Exim user", but it hasn't, because either the -D option set macros, or the
3930 -C option set a non-trusted configuration file. There are two possibilities:
3931
3932 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3933 to do message deliveries. Thus, the fact that it is running as a
3934 non-privileged user is plausible, and might be wanted in some special
3935 configurations. However, really_exim will have been set false when
3936 privilege was dropped, to stop Exim trying to write to its normal log
3937 files. Therefore, re-enable normal log processing, assuming the sysadmin
3938 has set up the log directory correctly.
3939
3940 (2) If deliver_drop_privilege is not set, the configuration won't work as
3941 apparently intended, and so we log a panic message. In order to retain
3942 root for -C or -D, the caller must either be root or be invoking a
3943 trusted configuration file (when deliver_drop_privilege is false). */
3944
3945 if (removed_privilege && (!trusted_config || macros != NULL) &&
3946 real_uid == exim_uid)
3947 {
3948 if (deliver_drop_privilege)
3949 really_exim = TRUE; /* let logging work normally */
3950 else
3951 log_write(0, LOG_MAIN|LOG_PANIC,
3952 "exim user lost privilege for using %s option",
3953 trusted_config? "-D" : "-C");
3954 }
3955
3956 /* Start up Perl interpreter if Perl support is configured and there is a
3957 perl_startup option, and the configuration or the command line specifies
3958 initializing starting. Note that the global variables are actually called
3959 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3960
3961 #ifdef EXIM_PERL
3962 if (perl_start_option != 0)
3963 opt_perl_at_start = (perl_start_option > 0);
3964 if (opt_perl_at_start && opt_perl_startup != NULL)
3965 {
3966 uschar *errstr;
3967 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3968 errstr = init_perl(opt_perl_startup);
3969 if (errstr != NULL)
3970 {
3971 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3972 return EXIT_FAILURE;
3973 }
3974 opt_perl_started = TRUE;
3975 }
3976 #endif /* EXIM_PERL */
3977
3978 /* Log the arguments of the call if the configuration file said so. This is
3979 a debugging feature for finding out what arguments certain MUAs actually use.
3980 Don't attempt it if logging is disabled, or if listing variables or if
3981 verifying/testing addresses or expansions. */
3982
3983 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3984 && really_exim && !list_options && !checking)
3985 {
3986 int i;
3987 uschar *p = big_buffer;
3988 char * dummy;
3989 Ustrcpy(p, "cwd= (failed)");
3990 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3991 while (*p) p++;
3992 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3993 while (*p) p++;
3994 for (i = 0; i < argc; i++)
3995 {
3996 int len = Ustrlen(argv[i]);
3997 uschar *printing;
3998 uschar *quote;
3999 if (p + len + 8 >= big_buffer + big_buffer_size)
4000 {
4001 Ustrcpy(p, " ...");
4002 log_write(0, LOG_MAIN, "%s", big_buffer);
4003 Ustrcpy(big_buffer, "...");
4004 p = big_buffer + 3;
4005 }
4006 printing = string_printing(argv[i]);
4007 if (printing[0] == 0) quote = US"\""; else
4008 {
4009 uschar *pp = printing;
4010 quote = US"";
4011 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4012 }
4013 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4014 (p - big_buffer) - 4), printing, quote);
4015 while (*p) p++;
4016 }
4017
4018 if ((log_extra_selector & LX_arguments) != 0)
4019 log_write(0, LOG_MAIN, "%s", big_buffer);
4020 else
4021 debug_printf("%s\n", big_buffer);
4022 }
4023
4024 /* Set the working directory to be the top-level spool directory. We don't rely
4025 on this in the code, which always uses fully qualified names, but it's useful
4026 for core dumps etc. Don't complain if it fails - the spool directory might not
4027 be generally accessible and calls with the -C option (and others) have lost
4028 privilege by now. Before the chdir, we try to ensure that the directory exists.
4029 */
4030
4031 if (Uchdir(spool_directory) != 0)
4032 {
4033 int dummy;
4034 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4035 dummy = /* quieten compiler */ Uchdir(spool_directory);
4036 }
4037
4038 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4039 alias file. Exim doesn't have such a concept, but this call is screwed into
4040 Sun's YP makefiles. Handle this by calling a configured script, as the real
4041 user who called Exim. The -oA option can be used to pass an argument to the
4042 script. */
4043
4044 if (bi_option)
4045 {
4046 (void)fclose(config_file);
4047 if (bi_command != NULL)
4048 {
4049 int i = 0;
4050 uschar *argv[3];
4051 argv[i++] = bi_command;
4052 if (alias_arg != NULL) argv[i++] = alias_arg;
4053 argv[i++] = NULL;
4054
4055 setgroups(group_count, group_list);
4056 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4057
4058 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4059 (argv[1] == NULL)? US"" : argv[1]);
4060
4061 execv(CS argv[0], (char *const *)argv);
4062 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
4063 exit(EXIT_FAILURE);
4064 }
4065 else
4066 {
4067 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4068 exit(EXIT_SUCCESS);
4069 }
4070 }
4071
4072 /* We moved the admin/trusted check to be immediately after reading the
4073 configuration file. We leave these prints here to ensure that syslog setup,
4074 logfile setup, and so on has already happened. */
4075
4076 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4077 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4078
4079 /* Only an admin user may start the daemon or force a queue run in the default
4080 configuration, but the queue run restriction can be relaxed. Only an admin
4081 user may request that a message be returned to its sender forthwith. Only an
4082 admin user may specify a debug level greater than D_v (because it might show
4083 passwords, etc. in lookup queries). Only an admin user may request a queue
4084 count. Only an admin user can use the test interface to scan for email
4085 (because Exim will be in the spool dir and able to look at mails). */
4086
4087 if (!admin_user)
4088 {
4089 BOOL debugset = (debug_selector & ~D_v) != 0;
4090 if (deliver_give_up || daemon_listen || malware_test_file ||
4091 (count_queue && queue_list_requires_admin) ||
4092 (list_queue && queue_list_requires_admin) ||
4093 (queue_interval >= 0 && prod_requires_admin) ||
4094 (debugset && !running_in_test_harness))
4095 {
4096 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4097 exit(EXIT_FAILURE);
4098 }
4099 }
4100
4101 /* If the real user is not root or the exim uid, the argument for passing
4102 in an open TCP/IP connection for another message is not permitted, nor is
4103 running with the -N option for any delivery action, unless this call to exim is
4104 one that supplied an input message, or we are using a patched exim for
4105 regression testing. */
4106
4107 if (real_uid != root_uid && real_uid != exim_uid &&
4108 (continue_hostname != NULL ||
4109 (dont_deliver &&
4110 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4111 )) && !running_in_test_harness)
4112 {
4113 fprintf(stderr, "exim: Permission denied\n");
4114 return EXIT_FAILURE;
4115 }
4116
4117 /* If the caller is not trusted, certain arguments are ignored when running for
4118 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4119 Note that authority for performing certain actions on messages is tested in the
4120 queue_action() function. */
4121
4122 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4123 {
4124 sender_host_name = sender_host_address = interface_address =
4125 sender_ident = received_protocol = NULL;
4126 sender_host_port = interface_port = 0;
4127 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4128 }
4129
4130 /* If a sender host address is set, extract the optional port number off the
4131 end of it and check its syntax. Do the same thing for the interface address.
4132 Exim exits if the syntax is bad. */
4133
4134 else
4135 {
4136 if (sender_host_address != NULL)
4137 sender_host_port = check_port(sender_host_address);
4138 if (interface_address != NULL)
4139 interface_port = check_port(interface_address);
4140 }
4141
4142 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4143 if (flag_G)
4144 {
4145 if (trusted_caller)
4146 {
4147 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4148 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4149 }
4150 else
4151 {
4152 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4153 return EXIT_FAILURE;
4154 }
4155 }
4156
4157 /* If an SMTP message is being received check to see if the standard input is a
4158 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4159 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4160 barf. */
4161
4162 if (smtp_input)
4163 {
4164 union sockaddr_46 inetd_sock;
4165 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4166 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4167 {
4168 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4169 if (family == AF_INET || family == AF_INET6)
4170 {
4171 union sockaddr_46 interface_sock;
4172 size = sizeof(interface_sock);
4173
4174 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4175 interface_address = host_ntoa(-1, &interface_sock, NULL,
4176 &interface_port);
4177
4178 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4179
4180 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4181 {
4182 is_inetd = TRUE;
4183 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4184 NULL, &sender_host_port);
4185 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4186 "inetd is not supported when mua_wrapper is set");
4187 }
4188 else
4189 {
4190 fprintf(stderr,
4191 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4192 return EXIT_FAILURE;
4193 }
4194 }
4195 }
4196 }
4197
4198 /* If the load average is going to be needed while receiving a message, get it
4199 now for those OS that require the first call to os_getloadavg() to be done as
4200 root. There will be further calls later for each message received. */
4201
4202 #ifdef LOAD_AVG_NEEDS_ROOT
4203 if (receiving_message &&
4204 (queue_only_load >= 0 ||
4205 (is_inetd && smtp_load_reserve >= 0)
4206 ))
4207 {
4208 load_average = OS_GETLOADAVG();
4209 }
4210 #endif
4211
4212 /* The queue_only configuration option can be overridden by -odx on the command
4213 line, except that if queue_only_override is false, queue_only cannot be unset
4214 from the command line. */
4215
4216 if (queue_only_set && (queue_only_override || arg_queue_only))
4217 queue_only = arg_queue_only;
4218
4219 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4220 -or and -os. */
4221
4222 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4223 if (arg_smtp_receive_timeout >= 0)
4224 smtp_receive_timeout = arg_smtp_receive_timeout;
4225
4226 /* If Exim was started with root privilege, unless we have already removed the
4227 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4228 except when starting the daemon or doing some kind of delivery or address
4229 testing (-bt). These are the only cases when root need to be retained. We run
4230 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4231 retained only for starting the daemon. We always do the initgroups() in this
4232 situation (controlled by the TRUE below), in order to be as close as possible
4233 to the state Exim usually runs in. */
4234
4235 if (!unprivileged && /* originally had root AND */
4236 !removed_privilege && /* still got root AND */
4237 !daemon_listen && /* not starting the daemon */
4238 queue_interval <= 0 && /* (either kind of daemon) */
4239 ( /* AND EITHER */
4240 deliver_drop_privilege || /* requested unprivileged */
4241 ( /* OR */
4242 queue_interval < 0 && /* not running the queue */
4243 (msg_action_arg < 0 || /* and */
4244 msg_action != MSG_DELIVER) && /* not delivering and */
4245 (!checking || !address_test_mode) /* not address checking */
4246 )
4247 ))
4248 {
4249 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4250 }
4251
4252 /* When we are retaining a privileged uid, we still change to the exim gid. */
4253
4254 else
4255 {
4256 int rv;
4257 rv = setgid(exim_gid);
4258 /* Impact of failure is that some stuff might end up with an incorrect group.
4259 We track this for failures from root, since any attempt to change privilege
4260 by root should succeed and failures should be examined. For non-root,
4261 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4262 no need to complain then. */
4263 if (rv == -1)
4264 {
4265 if (!(unprivileged || removed_privilege))
4266 {
4267 fprintf(stderr,
4268 "exim: changing group failed: %s\n", strerror(errno));
4269 exit(EXIT_FAILURE);
4270 }
4271 else
4272 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4273 (long int)exim_gid, strerror(errno));
4274 }
4275 }
4276
4277 /* Handle a request to scan a file for malware */
4278 if (malware_test_file)
4279 {
4280 #ifdef WITH_CONTENT_SCAN
4281 int result;
4282 set_process_info("scanning file for malware");
4283 result = malware_in_file(malware_test_file);
4284 if (result == FAIL)
4285 {
4286 printf("No malware found.\n");
4287 exit(EXIT_SUCCESS);
4288 }
4289 if (result != OK)
4290 {
4291 printf("Malware lookup returned non-okay/fail: %d\n", result);
4292 exit(EXIT_FAILURE);
4293 }
4294 if (malware_name)
4295 printf("Malware found: %s\n", malware_name);
4296 else
4297 printf("Malware scan detected malware of unknown name.\n");
4298 #else
4299 printf("Malware scanning not enabled at compile time.\n");
4300 #endif
4301 exit(EXIT_FAILURE);
4302 }
4303
4304 /* Handle a request to list the delivery queue */
4305
4306 if (list_queue)
4307 {
4308 set_process_info("listing the queue");
4309 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4310 exit(EXIT_SUCCESS);
4311 }
4312
4313 /* Handle a request to count the delivery queue */
4314
4315 if (count_queue)
4316 {
4317 set_process_info("counting the queue");
4318 queue_count();
4319 exit(EXIT_SUCCESS);
4320 }
4321
4322 /* Handle actions on specific messages, except for the force delivery and
4323 message load actions, which are done below. Some actions take a whole list of
4324 message ids, which are known to continue up to the end of the arguments. Others
4325 take a single message id and then operate on the recipients list. */
4326
4327 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4328 {
4329 int yield = EXIT_SUCCESS;
4330 set_process_info("acting on specified messages");
4331
4332 if (!one_msg_action)
4333 {
4334 for (i = msg_action_arg; i < argc; i++)
4335 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4336 yield = EXIT_FAILURE;
4337 }
4338
4339 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4340 recipients_arg)) yield = EXIT_FAILURE;
4341 exit(yield);
4342 }
4343
4344 /* We used to set up here to skip reading the ACL section, on
4345 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4346 Now, since the intro of the ${acl } expansion, ACL definitions may be
4347 needed in transports so we lost the optimisation. */
4348
4349 readconf_rest();
4350
4351 /* The configuration data will have been read into POOL_PERM because we won't
4352 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4353 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4354 configuration were read into POOL_MAIN, because we don't do any resets till
4355 later on. However, it seems right, and it does ensure that both pools get used.
4356 */
4357
4358 store_pool = POOL_MAIN;
4359
4360 /* Handle the -brt option. This is for checking out retry configurations.
4361 The next three arguments are a domain name or a complete address, and
4362 optionally two error numbers. All it does is to call the function that
4363 scans the retry configuration data. */
4364
4365 if (test_retry_arg >= 0)
4366 {
4367 retry_config *yield;
4368 int basic_errno = 0;
4369 int more_errno = 0;
4370 uschar *s1, *s2;
4371
4372 if (test_retry_arg >= argc)
4373 {
4374 printf("-brt needs a domain or address argument\n");
4375 exim_exit(EXIT_FAILURE);
4376 }
4377 s1 = argv[test_retry_arg++];
4378 s2 = NULL;
4379
4380 /* If the first argument contains no @ and no . it might be a local user
4381 or it might be a single-component name. Treat as a domain. */
4382
4383 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4384 {
4385 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4386 "being \ntreated as a one-component domain, not as a local part.\n\n",
4387 s1);
4388 }
4389
4390 /* There may be an optional second domain arg. */
4391
4392 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4393 s2 = argv[test_retry_arg++];
4394
4395 /* The final arg is an error name */
4396
4397 if (test_retry_arg < argc)
4398 {
4399 uschar *ss = argv[test_retry_arg];
4400 uschar *error =
4401 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4402 if (error != NULL)
4403 {
4404 printf("%s\n", CS error);
4405 return EXIT_FAILURE;
4406 }
4407
4408 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4409 code > 100 as an error is for matching codes to the decade. Turn them into
4410 a real error code, off the decade. */
4411
4412 if (basic_errno == ERRNO_MAIL4XX ||
4413 basic_errno == ERRNO_RCPT4XX ||
4414 basic_errno == ERRNO_DATA4XX)
4415 {
4416 int code = (more_errno >> 8) & 255;
4417 if (code == 255)
4418 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4419 else if (code > 100)
4420 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4421 }
4422 }
4423
4424 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4425 if (yield == NULL) printf("No retry information found\n"); else
4426 {
4427 retry_rule *r;
4428 more_errno = yield->more_errno;
4429 printf("Retry rule: %s ", yield->pattern);
4430
4431 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4432 {
4433 printf("quota%s%s ",
4434 (more_errno > 0)? "_" : "",
4435 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4436 }
4437 else if (yield->basic_errno == ECONNREFUSED)
4438 {
4439 printf("refused%s%s ",
4440 (more_errno > 0)? "_" : "",
4441 (more_errno == 'M')? "MX" :
4442 (more_errno == 'A')? "A" : "");
4443 }
4444 else if (yield->basic_errno == ETIMEDOUT)
4445 {
4446 printf("timeout");
4447 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4448 more_errno &= 255;
4449 if (more_errno != 0) printf("_%s",
4450 (more_errno == 'M')? "MX" : "A");
4451 printf(" ");
4452 }
4453 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4454 printf("auth_failed ");
4455 else printf("* ");
4456
4457 for (r = yield->rules; r != NULL; r = r->next)
4458 {
4459 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4460 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4461 if (r->rule == 'G')
4462 {
4463 int x = r->p2;
4464 int f = x % 1000;
4465 int d = 100;
4466 printf(",%d.", x/1000);
4467 do
4468 {
4469 printf("%d", f/d);
4470 f %= d;
4471 d /= 10;
4472 }
4473 while (f != 0);
4474 }
4475 printf("; ");
4476 }
4477
4478 printf("\n");
4479 }
4480 exim_exit(EXIT_SUCCESS);
4481 }
4482
4483 /* Handle a request to list one or more configuration options */
4484 /* If -n was set, we suppress some information */
4485
4486 if (list_options)
4487 {
4488 set_process_info("listing variables");
4489 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4490 else for (i = recipients_arg; i < argc; i++)
4491 {
4492 if (i < argc - 1 &&
4493 (Ustrcmp(argv[i], "router") == 0 ||
4494 Ustrcmp(argv[i], "transport") == 0 ||
4495 Ustrcmp(argv[i], "authenticator") == 0 ||
4496 Ustrcmp(argv[i], "macro") == 0))
4497 {
4498 readconf_print(argv[i+1], argv[i], flag_n);
4499 i++;
4500 }
4501 else readconf_print(argv[i], NULL, flag_n);
4502 }
4503 exim_exit(EXIT_SUCCESS);
4504 }
4505
4506
4507 /* Handle a request to deliver one or more messages that are already on the
4508 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4509 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4510
4511 Delivery of specific messages is typically used for a small number when
4512 prodding by hand (when the option forced_delivery will be set) or when
4513 re-execing to regain root privilege. Each message delivery must happen in a
4514 separate process, so we fork a process for each one, and run them sequentially
4515 so that debugging output doesn't get intertwined, and to avoid spawning too
4516 many processes if a long list is given. However, don't fork for the last one;
4517 this saves a process in the common case when Exim is called to deliver just one
4518 message. */
4519
4520 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4521 {
4522 if (prod_requires_admin && !admin_user)
4523 {
4524 fprintf(stderr, "exim: Permission denied\n");
4525 exim_exit(EXIT_FAILURE);
4526 }
4527 set_process_info("delivering specified messages");
4528 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4529 for (i = msg_action_arg; i < argc; i++)
4530 {
4531 int status;
4532 pid_t pid;
4533 if (i == argc - 1)
4534 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4535 else if ((pid = fork()) == 0)
4536 {
4537 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4538 _exit(EXIT_SUCCESS);
4539 }
4540 else if (pid < 0)
4541 {
4542 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4543 strerror(errno));
4544 exim_exit(EXIT_FAILURE);
4545 }
4546 else wait(&status);
4547 }
4548 exim_exit(EXIT_SUCCESS);
4549 }
4550
4551
4552 /* If only a single queue run is requested, without SMTP listening, we can just
4553 turn into a queue runner, with an optional starting message id. */
4554
4555 if (queue_interval == 0 && !daemon_listen)
4556 {
4557 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4558 (start_queue_run_id == NULL)? US"" : US" starting at ",
4559 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4560 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4561 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4562 set_process_info("running the queue (single queue run)");
4563 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4564 exim_exit(EXIT_SUCCESS);
4565 }
4566
4567
4568 /* Find the login name of the real user running this process. This is always
4569 needed when receiving a message, because it is written into the spool file. It
4570 may also be used to construct a from: or a sender: header, and in this case we
4571 need the user's full name as well, so save a copy of it, checked for RFC822
4572 syntax and munged if necessary, if it hasn't previously been set by the -F
4573 argument. We may try to get the passwd entry more than once, in case NIS or
4574 other delays are in evidence. Save the home directory for use in filter testing
4575 (only). */
4576
4577 for (i = 0;;)
4578 {
4579 if ((pw = getpwuid(real_uid)) != NULL)
4580 {
4581 originator_login = string_copy(US pw->pw_name);
4582 originator_home = string_copy(US pw->pw_dir);
4583
4584 /* If user name has not been set by -F, set it from the passwd entry
4585 unless -f has been used to set the sender address by a trusted user. */
4586
4587 if (originator_name == NULL)
4588 {
4589 if (sender_address == NULL ||
4590 (!trusted_caller && filter_test == FTEST_NONE))
4591 {
4592 uschar *name = US pw->pw_gecos;
4593 uschar *amp = Ustrchr(name, '&');
4594 uschar buffer[256];
4595
4596 /* Most Unix specify that a '&' character in the gecos field is
4597 replaced by a copy of the login name, and some even specify that
4598 the first character should be upper cased, so that's what we do. */
4599
4600 if (amp != NULL)
4601 {
4602 int loffset;
4603 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4604 amp - name, name, &loffset, originator_login, amp + 1);
4605 buffer[loffset] = toupper(buffer[loffset]);
4606 name = buffer;
4607 }
4608
4609 /* If a pattern for matching the gecos field was supplied, apply
4610 it and then expand the name string. */
4611
4612 if (gecos_pattern != NULL && gecos_name != NULL)
4613 {
4614 const pcre *re;
4615 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4616
4617 if (regex_match_and_setup(re, name, 0, -1))
4618 {
4619 uschar *new_name = expand_string(gecos_name);
4620 expand_nmax = -1;
4621 if (new_name != NULL)
4622 {
4623 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4624 "gecos field \"%s\"\n", new_name, name);
4625 name = new_name;
4626 }
4627 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4628 "\"%s\": %s\n", gecos_name, expand_string_message);
4629 }
4630 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4631 "gecos field \"%s\"\n", gecos_pattern, name);
4632 store_free((void *)re);
4633 }
4634 originator_name = string_copy(name);
4635 }
4636
4637 /* A trusted caller has used -f but not -F */
4638
4639 else originator_name = US"";
4640 }
4641
4642 /* Break the retry loop */
4643
4644 break;
4645 }
4646
4647 if (++i > finduser_retries) break;
4648 sleep(1);
4649 }
4650
4651 /* If we cannot get a user login, log the incident and give up, unless the
4652 configuration specifies something to use. When running in the test harness,
4653 any setting of unknown_login overrides the actual name. */
4654
4655 if (originator_login == NULL || running_in_test_harness)
4656 {
4657 if (unknown_login != NULL)
4658 {
4659 originator_login = expand_string(unknown_login);
4660 if (originator_name == NULL && unknown_username != NULL)
4661 originator_name = expand_string(unknown_username);
4662 if (originator_name == NULL) originator_name = US"";
4663 }
4664 if (originator_login == NULL)
4665 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4666 (int)real_uid);
4667 }
4668
4669 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4670 RFC822 address.*/
4671
4672 originator_name = string_copy(parse_fix_phrase(originator_name,
4673 Ustrlen(originator_name), big_buffer, big_buffer_size));
4674
4675 /* If a message is created by this call of Exim, the uid/gid of its originator
4676 are those of the caller. These values are overridden if an existing message is
4677 read in from the spool. */
4678
4679 originator_uid = real_uid;
4680 originator_gid = real_gid;
4681
4682 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4683 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4684
4685 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4686 returns. We leave this till here so that the originator_ fields are available
4687 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4688 mode. */
4689
4690 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4691 {
4692 if (mua_wrapper)
4693 {
4694 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4695 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4696 "mua_wrapper is set");
4697 }
4698 daemon_go();
4699 }
4700
4701 /* If the sender ident has not been set (by a trusted caller) set it to
4702 the caller. This will get overwritten below for an inetd call. If a trusted
4703 caller has set it empty, unset it. */
4704
4705 if (sender_ident == NULL) sender_ident = originator_login;
4706 else if (sender_ident[0] == 0) sender_ident = NULL;
4707
4708 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4709 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4710 originator_* variables set. */
4711
4712 if (test_rewrite_arg >= 0)
4713 {
4714 really_exim = FALSE;
4715 if (test_rewrite_arg >= argc)
4716 {
4717 printf("-brw needs an address argument\n");
4718 exim_exit(EXIT_FAILURE);
4719 }
4720 rewrite_test(argv[test_rewrite_arg]);
4721 exim_exit(EXIT_SUCCESS);
4722 }
4723
4724 /* A locally-supplied message is considered to be coming from a local user
4725 unless a trusted caller supplies a sender address with -f, or is passing in the
4726 message via SMTP (inetd invocation or otherwise). */
4727
4728 if ((sender_address == NULL && !smtp_input) ||
4729 (!trusted_caller && filter_test == FTEST_NONE))
4730 {
4731 sender_local = TRUE;
4732
4733 /* A trusted caller can supply authenticated_sender and authenticated_id
4734 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4735 defaults except when host checking. */
4736
4737 if (authenticated_sender == NULL && !host_checking)
4738 authenticated_sender = string_sprintf("%s@%s", originator_login,
4739 qualify_domain_sender);
4740 if (authenticated_id == NULL && !host_checking)
4741 authenticated_id = originator_login;
4742 }
4743
4744 /* Trusted callers are always permitted to specify the sender address.
4745 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4746 is specified is the empty address. However, if a trusted caller does not
4747 specify a sender address for SMTP input, we leave sender_address unset. This
4748 causes the MAIL commands to be honoured. */
4749
4750 if ((!smtp_input && sender_address == NULL) ||
4751 !receive_check_set_sender(sender_address))
4752 {
4753 /* Either the caller is not permitted to set a general sender, or this is
4754 non-SMTP input and the trusted caller has not set a sender. If there is no
4755 sender, or if a sender other than <> is set, override with the originator's
4756 login (which will get qualified below), except when checking things. */
4757
4758 if (sender_address == NULL /* No sender_address set */
4759 || /* OR */
4760 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4761 !checking && /* Not running tests, AND */
4762 filter_test == FTEST_NONE)) /* Not testing a filter */
4763 {
4764 sender_address = originator_login;
4765 sender_address_forced = FALSE;
4766 sender_address_domain = 0;
4767 }
4768 }
4769
4770 /* Remember whether an untrusted caller set the sender address */
4771
4772 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4773
4774 /* Ensure that the sender address is fully qualified unless it is the empty
4775 address, which indicates an error message, or doesn't exist (root caller, smtp
4776 interface, no -f argument). */
4777
4778 if (sender_address != NULL && sender_address[0] != 0 &&
4779 sender_address_domain == 0)
4780 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4781 qualify_domain_sender);
4782
4783 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4784
4785 /* Handle a request to verify a list of addresses, or test them for delivery.
4786 This must follow the setting of the sender address, since routers can be
4787 predicated upon the sender. If no arguments are given, read addresses from
4788 stdin. Set debug_level to at least D_v to get full output for address testing.
4789 */
4790
4791 if (verify_address_mode || address_test_mode)
4792 {
4793 int exit_value = 0;
4794 int flags = vopt_qualify;
4795
4796 if (verify_address_mode)
4797 {
4798 if (!verify_as_sender) flags |= vopt_is_recipient;
4799 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4800 }
4801
4802 else
4803 {
4804 flags |= vopt_is_recipient;
4805 debug_selector |= D_v;
4806 debug_file = stderr;
4807 debug_fd = fileno(debug_file);
4808 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4809 }
4810
4811 if (recipients_arg < argc)
4812 {
4813 while (recipients_arg < argc)
4814 {
4815 uschar *s = argv[recipients_arg++];
4816 while (*s != 0)
4817 {
4818 BOOL finished = FALSE;
4819 uschar *ss = parse_find_address_end(s, FALSE);
4820 if (*ss == ',') *ss = 0; else finished = TRUE;
4821 test_address(s, flags, &exit_value);
4822 s = ss;
4823 if (!finished)
4824 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4825 }
4826 }
4827 }
4828
4829 else for (;;)
4830 {
4831 uschar *s = get_stdinput(NULL, NULL);
4832 if (s == NULL) break;
4833 test_address(s, flags, &exit_value);
4834 }
4835
4836 route_tidyup();
4837 exim_exit(exit_value);
4838 }
4839
4840 /* Handle expansion checking. Either expand items on the command line, or read
4841 from stdin if there aren't any. If -Mset was specified, load the message so
4842 that its variables can be used, but restrict this facility to admin users.
4843 Otherwise, if -bem was used, read a message from stdin. */
4844
4845 if (expansion_test)
4846 {
4847 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4848 {
4849 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4850 if (!admin_user)
4851 {
4852 fprintf(stderr, "exim: permission denied\n");
4853 exit(EXIT_FAILURE);
4854 }
4855 message_id = argv[msg_action_arg];
4856 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4857 if (!spool_open_datafile(message_id))
4858 printf ("Failed to load message datafile %s\n", message_id);
4859 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4860 printf ("Failed to load message %s\n", message_id);
4861 }
4862
4863 /* Read a test message from a file. We fudge it up to be on stdin, saving
4864 stdin itself for later reading of expansion strings. */
4865
4866 else if (expansion_test_message != NULL)
4867 {
4868 int save_stdin = dup(0);
4869 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4870 if (fd < 0)
4871 {
4872 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4873 strerror(errno));
4874 return EXIT_FAILURE;
4875 }
4876 (void) dup2(fd, 0);
4877 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4878 message_ended = END_NOTENDED;
4879 read_message_body(receive_msg(extract_recipients));
4880 message_linecount += body_linecount;
4881 (void)dup2(save_stdin, 0);
4882 (void)close(save_stdin);
4883 clearerr(stdin); /* Required by Darwin */
4884 }
4885
4886 /* Allow $recipients for this testing */
4887
4888 enable_dollar_recipients = TRUE;
4889
4890 /* Expand command line items */
4891
4892 if (recipients_arg < argc)
4893 {
4894 while (recipients_arg < argc)
4895 {
4896 uschar *s = argv[recipients_arg++];
4897 uschar *ss = expand_string(s);
4898 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4899 else printf("%s\n", CS ss);
4900 }
4901 }
4902
4903 /* Read stdin */
4904
4905 else
4906 {
4907 char *(*fn_readline)(const char *) = NULL;
4908 void (*fn_addhist)(const char *) = NULL;
4909
4910 #ifdef USE_READLINE
4911 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4912 #endif
4913
4914 for (;;)
4915 {
4916 uschar *ss;
4917 uschar *source = get_stdinput(fn_readline, fn_addhist);
4918 if (source == NULL) break;
4919 ss = expand_string(source);
4920 if (ss == NULL)
4921 printf ("Failed: %s\n", expand_string_message);
4922 else printf("%s\n", CS ss);
4923 }
4924
4925 #ifdef USE_READLINE
4926 if (dlhandle != NULL) dlclose(dlhandle);
4927 #endif
4928 }
4929
4930 /* The data file will be open after -Mset */
4931
4932 if (deliver_datafile >= 0)
4933 {
4934 (void)close(deliver_datafile);
4935 deliver_datafile = -1;
4936 }
4937
4938 exim_exit(EXIT_SUCCESS);
4939 }
4940
4941
4942 /* The active host name is normally the primary host name, but it can be varied
4943 for hosts that want to play several parts at once. We need to ensure that it is
4944 set for host checking, and for receiving messages. */
4945
4946 smtp_active_hostname = primary_hostname;
4947 if (raw_active_hostname != NULL)
4948 {
4949 uschar *nah = expand_string(raw_active_hostname);
4950 if (nah == NULL)
4951 {
4952 if (!expand_string_forcedfail)
4953 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4954 "(smtp_active_hostname): %s", raw_active_hostname,
4955 expand_string_message);
4956 }
4957 else if (nah[0] != 0) smtp_active_hostname = nah;
4958 }
4959
4960 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4961 given IP address so that the blocking and relay configuration can be tested.
4962 Unless a sender_ident was set by -oMt, we discard it (the default is the
4963 caller's login name). An RFC 1413 call is made only if we are running in the
4964 test harness and an incoming interface and both ports are specified, because
4965 there is no TCP/IP call to find the ident for. */
4966
4967 if (host_checking)
4968 {
4969 int x[4];
4970 int size;
4971
4972 if (!sender_ident_set)
4973 {
4974 sender_ident = NULL;
4975 if (running_in_test_harness && sender_host_port != 0 &&
4976 interface_address != NULL && interface_port != 0)
4977 verify_get_ident(1413);
4978 }
4979
4980 /* In case the given address is a non-canonical IPv6 address, canonicize
4981 it. The code works for both IPv4 and IPv6, as it happens. */
4982
4983 size = host_aton(sender_host_address, x);
4984 sender_host_address = store_get(48); /* large enough for full IPv6 */
4985 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4986
4987 /* Now set up for testing */
4988
4989 host_build_sender_fullhost();
4990 smtp_input = TRUE;
4991 smtp_in = stdin;
4992 smtp_out = stdout;
4993 sender_local = FALSE;
4994 sender_host_notsocket = TRUE;
4995 debug_file = stderr;
4996 debug_fd = fileno(debug_file);
4997 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4998 "**** but without any ident (RFC 1413) callback.\n"
4999 "**** This is not for real!\n\n",
5000 sender_host_address);
5001
5002 if (verify_check_host(&hosts_connection_nolog) == OK)
5003 log_write_selector &= ~L_smtp_connection;
5004 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5005
5006 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5007 because a log line has already been written for all its failure exists
5008 (usually "connection refused: <reason>") and writing another one is
5009 unnecessary clutter. */
5010
5011 if (smtp_start_session())
5012 {
5013 reset_point = store_get(0);
5014 for (;;)
5015 {
5016 store_reset(reset_point);
5017 if (smtp_setup_msg() <= 0) break;
5018 if (!receive_msg(FALSE)) break;
5019 }
5020 smtp_log_no_mail();
5021 }
5022 exim_exit(EXIT_SUCCESS);
5023 }
5024
5025
5026 /* Arrange for message reception if recipients or SMTP were specified;
5027 otherwise complain unless a version print (-bV) happened or this is a filter
5028 verification test or info dump.
5029 In the former case, show the configuration file name. */
5030
5031 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5032 {
5033 if (version_printed)
5034 {
5035 printf("Configuration file is %s\n", config_main_filename);
5036 return EXIT_SUCCESS;
5037 }
5038
5039 if (info_flag != CMDINFO_NONE)
5040 {
5041 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5042 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5043 }
5044
5045 if (filter_test == FTEST_NONE)
5046 exim_usage(called_as);
5047 }
5048
5049
5050 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5051 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5052 that we are not called from inetd, because that is rejected above. The
5053 following configuration settings are forced here:
5054
5055 (1) Synchronous delivery (-odi)
5056 (2) Errors to stderr (-oep == -oeq)
5057 (3) No parallel remote delivery
5058 (4) Unprivileged delivery
5059
5060 We don't force overall queueing options because there are several of them;
5061 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5062 to override any SMTP queueing. */
5063
5064 if (mua_wrapper)
5065 {
5066 synchronous_delivery = TRUE;
5067 arg_error_handling = ERRORS_STDERR;
5068 remote_max_parallel = 1;
5069 deliver_drop_privilege = TRUE;
5070 queue_smtp = FALSE;
5071 queue_smtp_domains = NULL;
5072 }
5073
5074
5075 /* Prepare to accept one or more new messages on the standard input. When a
5076 message has been read, its id is returned in message_id[]. If doing immediate
5077 delivery, we fork a delivery process for each received message, except for the
5078 last one, where we can save a process switch.
5079
5080 It is only in non-smtp mode that error_handling is allowed to be changed from
5081 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5082 sendmail error modes other than -oem ever actually used? Later: yes.) */
5083
5084 if (!smtp_input) error_handling = arg_error_handling;
5085
5086 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5087 logging being sent down the socket and make an identd call to get the
5088 sender_ident. */
5089
5090 else if (is_inetd)
5091 {
5092 (void)fclose(stderr);
5093 exim_nullstd(); /* Re-open to /dev/null */
5094 verify_get_ident(IDENT_PORT);
5095 host_build_sender_fullhost();
5096 set_process_info("handling incoming connection from %s via inetd",
5097 sender_fullhost);
5098 }
5099
5100 /* If the sender host address has been set, build sender_fullhost if it hasn't
5101 already been done (which it will have been for inetd). This caters for the
5102 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5103 so that the test for IP options is skipped for -bs input. */
5104
5105 if (sender_host_address != NULL && sender_fullhost == NULL)
5106 {
5107 host_build_sender_fullhost();
5108 set_process_info("handling incoming connection from %s via -oMa",
5109 sender_fullhost);
5110 sender_host_notsocket = TRUE;
5111 }
5112
5113 /* Otherwise, set the sender host as unknown except for inetd calls. This
5114 prevents host checking in the case of -bs not from inetd and also for -bS. */
5115
5116 else if (!is_inetd) sender_host_unknown = TRUE;
5117
5118 /* If stdout does not exist, then dup stdin to stdout. This can happen
5119 if exim is started from inetd. In this case fd 0 will be set to the socket,
5120 but fd 1 will not be set. This also happens for passed SMTP channels. */
5121
5122 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5123
5124 /* Set up the incoming protocol name and the state of the program. Root is
5125 allowed to force received protocol via the -oMr option above. If we have come
5126 via inetd, the process info has already been set up. We don't set
5127 received_protocol here for smtp input, as it varies according to
5128 batch/HELO/EHLO/AUTH/TLS. */
5129
5130 if (smtp_input)
5131 {
5132 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5133 smtp_batched_input? "batched " : "",
5134 (sender_address!= NULL)? sender_address : originator_login);
5135 }
5136 else
5137 {
5138 if (received_protocol == NULL)
5139 received_protocol = string_sprintf("local%s", called_as);
5140 set_process_info("accepting a local non-SMTP message from <%s>",
5141 sender_address);
5142 }
5143
5144 /* Initialize the session_local_queue-only flag (this will be ignored if
5145 mua_wrapper is set) */
5146
5147 queue_check_only();
5148 session_local_queue_only = queue_only;
5149
5150 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5151 the spool if so configured. On failure, we must not attempt to send an error
5152 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5153 error code is given.) */
5154
5155 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5156 {
5157 fprintf(stderr, "exim: insufficient disk space\n");
5158 return EXIT_FAILURE;
5159 }
5160
5161 /* If this is smtp input of any kind, real or batched, handle the start of the
5162 SMTP session.
5163
5164 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5165 because a log line has already been written for all its failure exists
5166 (usually "connection refused: <reason>") and writing another one is
5167 unnecessary clutter. */
5168
5169 if (smtp_input)
5170 {
5171 smtp_in = stdin;
5172 smtp_out = stdout;
5173 if (verify_check_host(&hosts_connection_nolog) == OK)
5174 log_write_selector &= ~L_smtp_connection;
5175 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5176 if (!smtp_start_session())
5177 {
5178 mac_smtp_fflush();
5179 exim_exit(EXIT_SUCCESS);
5180 }
5181 }
5182
5183 /* Otherwise, set up the input size limit here. */
5184
5185 else
5186 {
5187 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5188 if (expand_string_message != NULL)
5189 {
5190 if (thismessage_size_limit == -1)
5191 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5192 "message_size_limit: %s", expand_string_message);
5193 else
5194 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5195 "message_size_limit: %s", expand_string_message);
5196 }
5197 }
5198
5199 /* Loop for several messages when reading SMTP input. If we fork any child
5200 processes, we don't want to wait for them unless synchronous delivery is
5201 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5202 same as SIG_DFL, despite the fact that documentation often lists the default as
5203 "ignore". This is a confusing area. This is what I know:
5204
5205 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5206 processes that complete simply to go away without ever becoming defunct. You
5207 can't then wait for them - but we don't want to wait for them in the
5208 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5209 happen for all OS (e.g. *BSD is different).
5210
5211 But that's not the end of the story. Some (many? all?) systems have the
5212 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5213 has by default, so it seems that the difference is merely one of default
5214 (compare restarting vs non-restarting signals).
5215
5216 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5217 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5218 of the loop below. Paranoia rules.
5219
5220 February 2003: That's *still* not the end of the story. There are now versions
5221 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5222 process then calls waitpid(), a grumble is written to the system log, because
5223 this is logically inconsistent. In other words, it doesn't like the paranoia.
5224 As a consequenc of this, the waitpid() below is now excluded if we are sure
5225 that SIG_IGN works. */
5226
5227 if (!synchronous_delivery)
5228 {
5229 #ifdef SA_NOCLDWAIT
5230 struct sigaction act;
5231 act.sa_handler = SIG_IGN;
5232 sigemptyset(&(act.sa_mask));
5233 act.sa_flags = SA_NOCLDWAIT;
5234 sigaction(SIGCHLD, &act, NULL);
5235 #else
5236 signal(SIGCHLD, SIG_IGN);
5237 #endif
5238 }
5239
5240 /* Save the current store pool point, for resetting at the start of
5241 each message, and save the real sender address, if any. */
5242
5243 reset_point = store_get(0);
5244 real_sender_address = sender_address;
5245
5246 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5247 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5248 collapsed). */
5249
5250 while (more)
5251 {
5252 store_reset(reset_point);
5253 message_id[0] = 0;
5254
5255 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5256 input and build the recipients list, before calling receive_msg() to read the
5257 message proper. Whatever sender address is given in the SMTP transaction is
5258 often ignored for local senders - we use the actual sender, which is normally
5259 either the underlying user running this process or a -f argument provided by
5260 a trusted caller. It is saved in real_sender_address. The test for whether to
5261 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5262
5263 if (smtp_input)
5264 {
5265 int rc;
5266 if ((rc = smtp_setup_msg()) > 0)
5267 {
5268 if (real_sender_address != NULL &&
5269 !receive_check_set_sender(sender_address))
5270 {
5271 sender_address = raw_sender = real_sender_address;
5272 sender_address_unrewritten = NULL;
5273 }
5274
5275 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5276 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5277 the very end. The result of the ACL is ignored (as for other non-SMTP
5278 messages). It is run for its potential side effects. */
5279
5280 if (smtp_batched_input && acl_not_smtp_start != NULL)
5281 {
5282 uschar *user_msg, *log_msg;
5283 enable_dollar_recipients = TRUE;
5284 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5285 &user_msg, &log_msg);
5286 enable_dollar_recipients = FALSE;
5287 }
5288
5289 /* Now get the data for the message */
5290
5291 more = receive_msg(extract_recipients);
5292 if (message_id[0] == 0)
5293 {
5294 if (more) continue;
5295 smtp_log_no_mail(); /* Log no mail if configured */
5296 exim_exit(EXIT_FAILURE);
5297 }
5298 }
5299 else
5300 {
5301 smtp_log_no_mail(); /* Log no mail if configured */
5302 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5303 }
5304 }
5305
5306 /* In the non-SMTP case, we have all the information from the command
5307 line, but must process it in case it is in the more general RFC822
5308 format, and in any case, to detect syntax errors. Also, it appears that
5309 the use of comma-separated lists as single arguments is common, so we
5310 had better support them. */
5311
5312 else
5313 {
5314 int i;
5315 int rcount = 0;
5316 int count = argc - recipients_arg;
5317 uschar **list = argv + recipients_arg;
5318
5319 /* These options cannot be changed dynamically for non-SMTP messages */
5320
5321 active_local_sender_retain = local_sender_retain;
5322 active_local_from_check = local_from_check;
5323
5324 /* Save before any rewriting */
5325
5326 raw_sender = string_copy(sender_address);
5327
5328 /* Loop for each argument */
5329
5330 for (i = 0; i < count; i++)
5331 {
5332 int start, end, domain;
5333 uschar *errmess;
5334 uschar *s = list[i];
5335
5336 /* Loop for each comma-separated address */
5337
5338 while (*s != 0)
5339 {
5340 BOOL finished = FALSE;
5341 uschar *recipient;
5342 uschar *ss = parse_find_address_end(s, FALSE);
5343
5344 if (*ss == ',') *ss = 0; else finished = TRUE;
5345
5346 /* Check max recipients - if -t was used, these aren't recipients */
5347
5348 if (recipients_max > 0 && ++rcount > recipients_max &&
5349 !extract_recipients)
5350 {
5351 if (error_handling == ERRORS_STDERR)
5352 {
5353 fprintf(stderr, "exim: too many recipients\n");
5354 exim_exit(EXIT_FAILURE);
5355 }
5356 else
5357 {
5358 return
5359 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5360 errors_sender_rc : EXIT_FAILURE;
5361 }
5362 }
5363
5364 recipient =
5365 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5366
5367 if (domain == 0 && !allow_unqualified_recipient)
5368 {
5369 recipient = NULL;
5370 errmess = US"unqualified recipient address not allowed";
5371 }
5372
5373 if (recipient == NULL)
5374 {
5375 if (error_handling == ERRORS_STDERR)
5376 {
5377 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5378 string_printing(list[i]), errmess);
5379 exim_exit(EXIT_FAILURE);
5380 }
5381 else
5382 {
5383 error_block eblock;
5384 eblock.next = NULL;
5385 eblock.text1 = string_printing(list[i]);
5386 eblock.text2 = errmess;
5387 return
5388 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5389 errors_sender_rc : EXIT_FAILURE;
5390 }
5391 }
5392
5393 receive_add_recipient(recipient, -1);
5394 s = ss;
5395 if (!finished)
5396 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5397 }
5398 }
5399
5400 /* Show the recipients when debugging */
5401
5402 DEBUG(D_receive)
5403 {
5404 int i;
5405 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5406 if (recipients_list != NULL)
5407 {
5408 debug_printf("Recipients:\n");
5409 for (i = 0; i < recipients_count; i++)
5410 debug_printf(" %s\n", recipients_list[i].address);
5411 }
5412 }
5413
5414 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5415 ignored; rejecting here would just add complication, and it can just as
5416 well be done later. Allow $recipients to be visible in the ACL. */
5417
5418 if (acl_not_smtp_start != NULL)
5419 {
5420 uschar *user_msg, *log_msg;
5421 enable_dollar_recipients = TRUE;
5422 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5423 &user_msg, &log_msg);
5424 enable_dollar_recipients = FALSE;
5425 }
5426
5427 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5428 will just read the headers for the message, and not write anything onto the
5429 spool. */
5430
5431 message_ended = END_NOTENDED;
5432 more = receive_msg(extract_recipients);
5433
5434 /* more is always FALSE here (not SMTP message) when reading a message
5435 for real; when reading the headers of a message for filter testing,
5436 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5437
5438 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5439 } /* Non-SMTP message reception */
5440
5441 /* If this is a filter testing run, there are headers in store, but
5442 no message on the spool. Run the filtering code in testing mode, setting
5443 the domain to the qualify domain and the local part to the current user,
5444 unless they have been set by options. The prefix and suffix are left unset
5445 unless specified. The the return path is set to to the sender unless it has
5446 already been set from a return-path header in the message. */
5447
5448 if (filter_test != FTEST_NONE)
5449 {
5450 deliver_domain = (ftest_domain != NULL)?
5451 ftest_domain : qualify_domain_recipient;
5452 deliver_domain_orig = deliver_domain;
5453 deliver_localpart = (ftest_localpart != NULL)?
5454 ftest_localpart : originator_login;
5455 deliver_localpart_orig = deliver_localpart;
5456 deliver_localpart_prefix = ftest_prefix;
5457 deliver_localpart_suffix = ftest_suffix;
5458 deliver_home = originator_home;
5459
5460 if (return_path == NULL)
5461 {
5462 printf("Return-path copied from sender\n");
5463 return_path = string_copy(sender_address);
5464 }
5465 else
5466 {
5467 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5468 }
5469 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5470
5471 receive_add_recipient(
5472 string_sprintf("%s%s%s@%s",
5473 (ftest_prefix == NULL)? US"" : ftest_prefix,
5474 deliver_localpart,
5475 (ftest_suffix == NULL)? US"" : ftest_suffix,
5476 deliver_domain), -1);
5477
5478 printf("Recipient = %s\n", recipients_list[0].address);
5479 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5480 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5481
5482 if (chdir("/")) /* Get away from wherever the user is running this from */
5483 {
5484 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5485 exim_exit(EXIT_FAILURE);
5486 }
5487
5488 /* Now we run either a system filter test, or a user filter test, or both.
5489 In the latter case, headers added by the system filter will persist and be
5490 available to the user filter. We need to copy the filter variables
5491 explicitly. */
5492
5493 if ((filter_test & FTEST_SYSTEM) != 0)
5494 {
5495 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5496 exim_exit(EXIT_FAILURE);
5497 }
5498
5499 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5500
5501 if ((filter_test & FTEST_USER) != 0)
5502 {
5503 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5504 exim_exit(EXIT_FAILURE);
5505 }
5506
5507 exim_exit(EXIT_SUCCESS);
5508 }
5509
5510 /* Else act on the result of message reception. We should not get here unless
5511 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5512 will be TRUE. If it is not, check on the number of messages received in this
5513 connection. */
5514
5515 if (!session_local_queue_only &&
5516 smtp_accept_queue_per_connection > 0 &&
5517 receive_messagecount > smtp_accept_queue_per_connection)
5518 {
5519 session_local_queue_only = TRUE;
5520 queue_only_reason = 2;
5521 }
5522
5523 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5524 and queue_only_load is set, check that the load average is below it. If it is
5525 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5526 default), we put the whole session into queue_only mode. It then remains this
5527 way for any subsequent messages on the same SMTP connection. This is a
5528 deliberate choice; even though the load average may fall, it doesn't seem
5529 right to deliver later messages on the same call when not delivering earlier
5530 ones. However, there are odd cases where this is not wanted, so this can be
5531 changed by setting queue_only_load_latch false. */
5532
5533 local_queue_only = session_local_queue_only;
5534 if (!local_queue_only && queue_only_load >= 0)
5535 {
5536 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5537 if (local_queue_only)
5538 {
5539 queue_only_reason = 3;
5540 if (queue_only_load_latch) session_local_queue_only = TRUE;
5541 }
5542 }
5543
5544 /* If running as an MUA wrapper, all queueing options and freezing options
5545 are ignored. */
5546
5547 if (mua_wrapper)
5548 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5549
5550 /* Log the queueing here, when it will get a message id attached, but
5551 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5552 connections). */
5553
5554 if (local_queue_only) switch(queue_only_reason)
5555 {
5556 case 2:
5557 log_write(L_delay_delivery,
5558 LOG_MAIN, "no immediate delivery: more than %d messages "
5559 "received in one connection", smtp_accept_queue_per_connection);
5560 break;
5561
5562 case 3:
5563 log_write(L_delay_delivery,
5564 LOG_MAIN, "no immediate delivery: load average %.2f",
5565 (double)load_average/1000.0);
5566 break;
5567 }
5568
5569 /* Else do the delivery unless the ACL or local_scan() called for queue only
5570 or froze the message. Always deliver in a separate process. A fork failure is
5571 not a disaster, as the delivery will eventually happen on a subsequent queue
5572 run. The search cache must be tidied before the fork, as the parent will
5573 do it before exiting. The child will trigger a lookup failure and
5574 thereby defer the delivery if it tries to use (for example) a cached ldap
5575 connection that the parent has called unbind on. */
5576
5577 else if (!queue_only_policy && !deliver_freeze)
5578 {
5579 pid_t pid;
5580 search_tidyup();
5581
5582 if ((pid = fork()) == 0)
5583 {
5584 int rc;
5585 close_unwanted(); /* Close unwanted file descriptors and TLS */
5586 exim_nullstd(); /* Ensure std{in,out,err} exist */
5587
5588 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5589 mode, deliver_drop_privilege is forced TRUE). */
5590
5591 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5592 {
5593 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5594 message_id);
5595 /* Control does not return here. */
5596 }
5597
5598 /* No need to re-exec */
5599
5600 rc = deliver_message(message_id, FALSE, FALSE);
5601 search_tidyup();
5602 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5603 EXIT_SUCCESS : EXIT_FAILURE);
5604 }
5605
5606 if (pid < 0)
5607 {
5608 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5609 "process: %s", strerror(errno));
5610 }
5611
5612 /* In the parent, wait if synchronous delivery is required. This will
5613 always be the case in MUA wrapper mode. */
5614
5615 else if (synchronous_delivery)
5616 {
5617 int status;
5618 while (wait(&status) != pid);
5619 if ((status & 0x00ff) != 0)
5620 log_write(0, LOG_MAIN|LOG_PANIC,
5621 "process %d crashed with signal %d while delivering %s",
5622 (int)pid, status & 0x00ff, message_id);
5623 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5624 }
5625 }
5626
5627 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5628 automatically reaps children (see comments above the loop), clear away any
5629 finished subprocesses here, in case there are lots of messages coming in
5630 from the same source. */
5631
5632 #ifndef SIG_IGN_WORKS
5633 while (waitpid(-1, NULL, WNOHANG) > 0);
5634 #endif
5635 }
5636
5637 exim_exit(EXIT_SUCCESS); /* Never returns */
5638 return 0; /* To stop compiler warning */
5639 }
5640
5641 /* End of exim.c */