5fca4352aa9bc775014d867ce12442abc587e19b
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2016 */
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 __GLIBC__
16 # include <gnu/libc-version.h>
17 #endif
18
19 #ifdef USE_GNUTLS
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22 # define DISABLE_OCSP
23 # endif
24 #endif
25
26 extern void init_lookup_list(void);
27
28
29
30 /*************************************************
31 * Function interface to store functions *
32 *************************************************/
33
34 /* We need some real functions to pass to the PCRE regular expression library
35 for store allocation via Exim's store manager. The normal calls are actually
36 macros that pass over location information to make tracing easier. These
37 functions just interface to the standard macro calls. A good compiler will
38 optimize out the tail recursion and so not make them too expensive. There
39 are two sets of functions; one for use when we want to retain the compiled
40 regular expression for a long time; the other for short-term use. */
41
42 static void *
43 function_store_get(size_t size)
44 {
45 return store_get((int)size);
46 }
47
48 static void
49 function_dummy_free(void *block) { block = block; }
50
51 static void *
52 function_store_malloc(size_t size)
53 {
54 return store_malloc((int)size);
55 }
56
57 static void
58 function_store_free(void *block)
59 {
60 store_free(block);
61 }
62
63
64
65
66 /*************************************************
67 * Enums for cmdline interface *
68 *************************************************/
69
70 enum commandline_info { CMDINFO_NONE=0,
71 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
72
73
74
75
76 /*************************************************
77 * Compile regular expression and panic on fail *
78 *************************************************/
79
80 /* This function is called when failure to compile a regular expression leads
81 to a panic exit. In other cases, pcre_compile() is called directly. In many
82 cases where this function is used, the results of the compilation are to be
83 placed in long-lived store, so we temporarily reset the store management
84 functions that PCRE uses if the use_malloc flag is set.
85
86 Argument:
87 pattern the pattern to compile
88 caseless TRUE if caseless matching is required
89 use_malloc TRUE if compile into malloc store
90
91 Returns: pointer to the compiled pattern
92 */
93
94 const pcre *
95 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
96 {
97 int offset;
98 int options = PCRE_COPT;
99 const pcre *yield;
100 const uschar *error;
101 if (use_malloc)
102 {
103 pcre_malloc = function_store_malloc;
104 pcre_free = function_store_free;
105 }
106 if (caseless) options |= PCRE_CASELESS;
107 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
108 pcre_malloc = function_store_get;
109 pcre_free = function_dummy_free;
110 if (yield == NULL)
111 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
112 "%s at offset %d while compiling %s", error, offset, pattern);
113 return yield;
114 }
115
116
117
118
119 /*************************************************
120 * Execute regular expression and set strings *
121 *************************************************/
122
123 /* This function runs a regular expression match, and sets up the pointers to
124 the matched substrings.
125
126 Arguments:
127 re the compiled expression
128 subject the subject string
129 options additional PCRE options
130 setup if < 0 do full setup
131 if >= 0 setup from setup+1 onwards,
132 excluding the full matched string
133
134 Returns: TRUE or FALSE
135 */
136
137 BOOL
138 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
139 {
140 int ovector[3*(EXPAND_MAXN+1)];
141 uschar * s = string_copy(subject); /* de-constifying */
142 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
143 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
144 BOOL yield = n >= 0;
145 if (n == 0) n = EXPAND_MAXN + 1;
146 if (yield)
147 {
148 int nn;
149 expand_nmax = (setup < 0)? 0 : setup + 1;
150 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
151 {
152 expand_nstring[expand_nmax] = s + ovector[nn];
153 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
154 }
155 expand_nmax--;
156 }
157 return yield;
158 }
159
160
161
162
163 /*************************************************
164 * Set up processing details *
165 *************************************************/
166
167 /* Save a text string for dumping when SIGUSR1 is received.
168 Do checks for overruns.
169
170 Arguments: format and arguments, as for printf()
171 Returns: nothing
172 */
173
174 void
175 set_process_info(const char *format, ...)
176 {
177 int len = sprintf(CS process_info, "%5d ", (int)getpid());
178 va_list ap;
179 va_start(ap, format);
180 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
181 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
182 len = Ustrlen(process_info);
183 process_info[len+0] = '\n';
184 process_info[len+1] = '\0';
185 process_info_len = len + 1;
186 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
187 va_end(ap);
188 }
189
190
191
192
193 /*************************************************
194 * Handler for SIGUSR1 *
195 *************************************************/
196
197 /* SIGUSR1 causes any exim process to write to the process log details of
198 what it is currently doing. It will only be used if the OS is capable of
199 setting up a handler that causes automatic restarting of any system call
200 that is in progress at the time.
201
202 This function takes care to be signal-safe.
203
204 Argument: the signal number (SIGUSR1)
205 Returns: nothing
206 */
207
208 static void
209 usr1_handler(int sig)
210 {
211 int fd;
212
213 os_restarting_signal(sig, usr1_handler);
214
215 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
216 if (fd < 0)
217 {
218 /* If we are already running as the Exim user, try to create it in the
219 current process (assuming spool_directory exists). Otherwise, if we are
220 root, do the creation in an exim:exim subprocess. */
221
222 int euid = geteuid();
223 if (euid == exim_uid)
224 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
225 else if (euid == root_uid)
226 fd = log_create_as_exim(process_log_path);
227 }
228
229 /* If we are neither exim nor root, or if we failed to create the log file,
230 give up. There is not much useful we can do with errors, since we don't want
231 to disrupt whatever is going on outside the signal handler. */
232
233 if (fd < 0) return;
234
235 (void)write(fd, process_info, process_info_len);
236 (void)close(fd);
237 }
238
239
240
241 /*************************************************
242 * Timeout handler *
243 *************************************************/
244
245 /* This handler is enabled most of the time that Exim is running. The handler
246 doesn't actually get used unless alarm() has been called to set a timer, to
247 place a time limit on a system call of some kind. When the handler is run, it
248 re-enables itself.
249
250 There are some other SIGALRM handlers that are used in special cases when more
251 than just a flag setting is required; for example, when reading a message's
252 input. These are normally set up in the code module that uses them, and the
253 SIGALRM handler is reset to this one afterwards.
254
255 Argument: the signal value (SIGALRM)
256 Returns: nothing
257 */
258
259 void
260 sigalrm_handler(int sig)
261 {
262 sig = sig; /* Keep picky compilers happy */
263 sigalrm_seen = TRUE;
264 os_non_restarting_signal(SIGALRM, sigalrm_handler);
265 }
266
267
268
269 /*************************************************
270 * Sleep for a fractional time interval *
271 *************************************************/
272
273 /* This function is called by millisleep() and exim_wait_tick() to wait for a
274 period of time that may include a fraction of a second. The coding is somewhat
275 tedious. We do not expect setitimer() ever to fail, but if it does, the process
276 will wait for ever, so we panic in this instance. (There was a case of this
277 when a bug in a function that calls milliwait() caused it to pass invalid data.
278 That's when I added the check. :-)
279
280 We assume it to be not worth sleeping for under 100us; this value will
281 require revisiting as hardware advances. This avoids the issue of
282 a zero-valued timer setting meaning "never fire".
283
284 Argument: an itimerval structure containing the interval
285 Returns: nothing
286 */
287
288 static void
289 milliwait(struct itimerval *itval)
290 {
291 sigset_t sigmask;
292 sigset_t old_sigmask;
293
294 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
295 return;
296 (void)sigemptyset(&sigmask); /* Empty mask */
297 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
298 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
299 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
300 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
301 "setitimer() failed: %s", strerror(errno));
302 (void)sigfillset(&sigmask); /* All signals */
303 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
304 (void)sigsuspend(&sigmask); /* Until SIGALRM */
305 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
306 }
307
308
309
310
311 /*************************************************
312 * Millisecond sleep function *
313 *************************************************/
314
315 /* The basic sleep() function has a granularity of 1 second, which is too rough
316 in some cases - for example, when using an increasing delay to slow down
317 spammers.
318
319 Argument: number of millseconds
320 Returns: nothing
321 */
322
323 void
324 millisleep(int msec)
325 {
326 struct itimerval itval;
327 itval.it_interval.tv_sec = 0;
328 itval.it_interval.tv_usec = 0;
329 itval.it_value.tv_sec = msec/1000;
330 itval.it_value.tv_usec = (msec % 1000) * 1000;
331 milliwait(&itval);
332 }
333
334
335
336 /*************************************************
337 * Compare microsecond times *
338 *************************************************/
339
340 /*
341 Arguments:
342 tv1 the first time
343 tv2 the second time
344
345 Returns: -1, 0, or +1
346 */
347
348 int
349 exim_tvcmp(struct timeval *t1, struct timeval *t2)
350 {
351 if (t1->tv_sec > t2->tv_sec) return +1;
352 if (t1->tv_sec < t2->tv_sec) return -1;
353 if (t1->tv_usec > t2->tv_usec) return +1;
354 if (t1->tv_usec < t2->tv_usec) return -1;
355 return 0;
356 }
357
358
359
360
361 /*************************************************
362 * Clock tick wait function *
363 *************************************************/
364
365 /* Exim uses a time + a pid to generate a unique identifier in two places: its
366 message IDs, and in file names for maildir deliveries. Because some OS now
367 re-use pids within the same second, sub-second times are now being used.
368 However, for absolute certaintly, we must ensure the clock has ticked before
369 allowing the relevant process to complete. At the time of implementation of
370 this code (February 2003), the speed of processors is such that the clock will
371 invariably have ticked already by the time a process has done its job. This
372 function prepares for the time when things are faster - and it also copes with
373 clocks that go backwards.
374
375 Arguments:
376 then_tv A timeval which was used to create uniqueness; its usec field
377 has been rounded down to the value of the resolution.
378 We want to be sure the current time is greater than this.
379 resolution The resolution that was used to divide the microseconds
380 (1 for maildir, larger for message ids)
381
382 Returns: nothing
383 */
384
385 void
386 exim_wait_tick(struct timeval *then_tv, int resolution)
387 {
388 struct timeval now_tv;
389 long int now_true_usec;
390
391 (void)gettimeofday(&now_tv, NULL);
392 now_true_usec = now_tv.tv_usec;
393 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
394
395 if (exim_tvcmp(&now_tv, then_tv) <= 0)
396 {
397 struct itimerval itval;
398 itval.it_interval.tv_sec = 0;
399 itval.it_interval.tv_usec = 0;
400 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
401 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
402
403 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
404 negative value for the microseconds is possible only in the case when "now"
405 is more than a second less than "then". That means that itval.it_value.tv_sec
406 is greater than zero. The following correction is therefore safe. */
407
408 if (itval.it_value.tv_usec < 0)
409 {
410 itval.it_value.tv_usec += 1000000;
411 itval.it_value.tv_sec -= 1;
412 }
413
414 DEBUG(D_transport|D_receive)
415 {
416 if (!running_in_test_harness)
417 {
418 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
419 then_tv->tv_sec, (long) then_tv->tv_usec,
420 now_tv.tv_sec, (long) now_tv.tv_usec);
421 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
422 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
423 }
424 }
425
426 milliwait(&itval);
427 }
428 }
429
430
431
432
433 /*************************************************
434 * Call fopen() with umask 777 and adjust mode *
435 *************************************************/
436
437 /* Exim runs with umask(0) so that files created with open() have the mode that
438 is specified in the open() call. However, there are some files, typically in
439 the spool directory, that are created with fopen(). They end up world-writeable
440 if no precautions are taken. Although the spool directory is not accessible to
441 the world, this is an untidiness. So this is a wrapper function for fopen()
442 that sorts out the mode of the created file.
443
444 Arguments:
445 filename the file name
446 options the fopen() options
447 mode the required mode
448
449 Returns: the fopened FILE or NULL
450 */
451
452 FILE *
453 modefopen(const uschar *filename, const char *options, mode_t mode)
454 {
455 mode_t saved_umask = umask(0777);
456 FILE *f = Ufopen(filename, options);
457 (void)umask(saved_umask);
458 if (f != NULL) (void)fchmod(fileno(f), mode);
459 return f;
460 }
461
462
463
464
465 /*************************************************
466 * Ensure stdin, stdout, and stderr exist *
467 *************************************************/
468
469 /* Some operating systems grumble if an exec() happens without a standard
470 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
471 file will be opened and will use these fd values, and then some other bit of
472 code will assume, for example, that it can write error messages to stderr.
473 This function ensures that fds 0, 1, and 2 are open if they do not already
474 exist, by connecting them to /dev/null.
475
476 This function is also used to ensure that std{in,out,err} exist at all times,
477 so that if any library that Exim calls tries to use them, it doesn't crash.
478
479 Arguments: None
480 Returns: Nothing
481 */
482
483 void
484 exim_nullstd(void)
485 {
486 int i;
487 int devnull = -1;
488 struct stat statbuf;
489 for (i = 0; i <= 2; i++)
490 {
491 if (fstat(i, &statbuf) < 0 && errno == EBADF)
492 {
493 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
494 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
495 string_open_failed(errno, "/dev/null"));
496 if (devnull != i) (void)dup2(devnull, i);
497 }
498 }
499 if (devnull > 2) (void)close(devnull);
500 }
501
502
503
504
505 /*************************************************
506 * Close unwanted file descriptors for delivery *
507 *************************************************/
508
509 /* This function is called from a new process that has been forked to deliver
510 an incoming message, either directly, or using exec.
511
512 We want any smtp input streams to be closed in this new process. However, it
513 has been observed that using fclose() here causes trouble. When reading in -bS
514 input, duplicate copies of messages have been seen. The files will be sharing a
515 file pointer with the parent process, and it seems that fclose() (at least on
516 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
517 least sometimes. Hence we go for closing the underlying file descriptors.
518
519 If TLS is active, we want to shut down the TLS library, but without molesting
520 the parent's SSL connection.
521
522 For delivery of a non-SMTP message, we want to close stdin and stdout (and
523 stderr unless debugging) because the calling process might have set them up as
524 pipes and be waiting for them to close before it waits for the submission
525 process to terminate. If they aren't closed, they hold up the calling process
526 until the initial delivery process finishes, which is not what we want.
527
528 Exception: We do want it for synchronous delivery!
529
530 And notwithstanding all the above, if D_resolver is set, implying resolver
531 debugging, leave stdout open, because that's where the resolver writes its
532 debugging output.
533
534 When we close stderr (which implies we've also closed stdout), we also get rid
535 of any controlling terminal.
536
537 Arguments: None
538 Returns: Nothing
539 */
540
541 static void
542 close_unwanted(void)
543 {
544 if (smtp_input)
545 {
546 #ifdef SUPPORT_TLS
547 tls_close(TRUE, FALSE); /* Shut down the TLS library */
548 #endif
549 (void)close(fileno(smtp_in));
550 (void)close(fileno(smtp_out));
551 smtp_in = NULL;
552 }
553 else
554 {
555 (void)close(0); /* stdin */
556 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
557 if (debug_selector == 0) /* stderr */
558 {
559 if (!synchronous_delivery)
560 {
561 (void)close(2);
562 log_stderr = NULL;
563 }
564 (void)setsid();
565 }
566 }
567 }
568
569
570
571
572 /*************************************************
573 * Set uid and gid *
574 *************************************************/
575
576 /* This function sets a new uid and gid permanently, optionally calling
577 initgroups() to set auxiliary groups. There are some special cases when running
578 Exim in unprivileged modes. In these situations the effective uid will not be
579 root; if we already have the right effective uid/gid, and don't need to
580 initialize any groups, leave things as they are.
581
582 Arguments:
583 uid the uid
584 gid the gid
585 igflag TRUE if initgroups() wanted
586 msg text to use in debugging output and failure log
587
588 Returns: nothing; bombs out on failure
589 */
590
591 void
592 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
593 {
594 uid_t euid = geteuid();
595 gid_t egid = getegid();
596
597 if (euid == root_uid || euid != uid || egid != gid || igflag)
598 {
599 /* At least one OS returns +1 for initgroups failure, so just check for
600 non-zero. */
601
602 if (igflag)
603 {
604 struct passwd *pw = getpwuid(uid);
605 if (pw != NULL)
606 {
607 if (initgroups(pw->pw_name, gid) != 0)
608 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
609 (long int)uid, strerror(errno));
610 }
611 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
612 "no passwd entry for uid=%ld", (long int)uid);
613 }
614
615 if (setgid(gid) < 0 || setuid(uid) < 0)
616 {
617 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
618 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
619 }
620 }
621
622 /* Debugging output included uid/gid and all groups */
623
624 DEBUG(D_uid)
625 {
626 int group_count, save_errno;
627 gid_t group_list[NGROUPS_MAX];
628 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
629 (long int)geteuid(), (long int)getegid(), (long int)getpid());
630 group_count = getgroups(NGROUPS_MAX, group_list);
631 save_errno = errno;
632 debug_printf(" auxiliary group list:");
633 if (group_count > 0)
634 {
635 int i;
636 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
637 }
638 else if (group_count < 0)
639 debug_printf(" <error: %s>", strerror(save_errno));
640 else debug_printf(" <none>");
641 debug_printf("\n");
642 }
643 }
644
645
646
647
648 /*************************************************
649 * Exit point *
650 *************************************************/
651
652 /* Exim exits via this function so that it always clears up any open
653 databases.
654
655 Arguments:
656 rc return code
657
658 Returns: does not return
659 */
660
661 void
662 exim_exit(int rc)
663 {
664 search_tidyup();
665 DEBUG(D_any)
666 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
667 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
668 exit(rc);
669 }
670
671
672
673
674 /*************************************************
675 * Extract port from host address *
676 *************************************************/
677
678 /* Called to extract the port from the values given to -oMa and -oMi.
679 It also checks the syntax of the address, and terminates it before the
680 port data when a port is extracted.
681
682 Argument:
683 address the address, with possible port on the end
684
685 Returns: the port, or zero if there isn't one
686 bombs out on a syntax error
687 */
688
689 static int
690 check_port(uschar *address)
691 {
692 int port = host_address_extract_port(address);
693 if (string_is_ip_address(address, NULL) == 0)
694 {
695 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
696 exit(EXIT_FAILURE);
697 }
698 return port;
699 }
700
701
702
703 /*************************************************
704 * Test/verify an address *
705 *************************************************/
706
707 /* This function is called by the -bv and -bt code. It extracts a working
708 address from a full RFC 822 address. This isn't really necessary per se, but it
709 has the effect of collapsing source routes.
710
711 Arguments:
712 s the address string
713 flags flag bits for verify_address()
714 exit_value to be set for failures
715
716 Returns: nothing
717 */
718
719 static void
720 test_address(uschar *s, int flags, int *exit_value)
721 {
722 int start, end, domain;
723 uschar *parse_error = NULL;
724 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
725 FALSE);
726 if (address == NULL)
727 {
728 fprintf(stdout, "syntax error: %s\n", parse_error);
729 *exit_value = 2;
730 }
731 else
732 {
733 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
734 -1, -1, NULL, NULL, NULL);
735 if (rc == FAIL) *exit_value = 2;
736 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
737 }
738 }
739
740
741
742 /*************************************************
743 * Show supported features *
744 *************************************************/
745
746 /* This function is called for -bV/--version and for -d to output the optional
747 features of the current Exim binary.
748
749 Arguments: a FILE for printing
750 Returns: nothing
751 */
752
753 static void
754 show_whats_supported(FILE *f)
755 {
756 auth_info *authi;
757
758 #ifdef DB_VERSION_STRING
759 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
760 #elif defined(BTREEVERSION) && defined(HASHVERSION)
761 #ifdef USE_DB
762 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
763 #else
764 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
765 #endif
766 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
767 fprintf(f, "Probably ndbm\n");
768 #elif defined(USE_TDB)
769 fprintf(f, "Using tdb\n");
770 #else
771 #ifdef USE_GDBM
772 fprintf(f, "Probably GDBM (native mode)\n");
773 #else
774 fprintf(f, "Probably GDBM (compatibility mode)\n");
775 #endif
776 #endif
777
778 fprintf(f, "Support for:");
779 #ifdef SUPPORT_CRYPTEQ
780 fprintf(f, " crypteq");
781 #endif
782 #if HAVE_ICONV
783 fprintf(f, " iconv()");
784 #endif
785 #if HAVE_IPV6
786 fprintf(f, " IPv6");
787 #endif
788 #ifdef HAVE_SETCLASSRESOURCES
789 fprintf(f, " use_setclassresources");
790 #endif
791 #ifdef SUPPORT_PAM
792 fprintf(f, " PAM");
793 #endif
794 #ifdef EXIM_PERL
795 fprintf(f, " Perl");
796 #endif
797 #ifdef EXPAND_DLFUNC
798 fprintf(f, " Expand_dlfunc");
799 #endif
800 #ifdef USE_TCP_WRAPPERS
801 fprintf(f, " TCPwrappers");
802 #endif
803 #ifdef SUPPORT_TLS
804 #ifdef USE_GNUTLS
805 fprintf(f, " GnuTLS");
806 #else
807 fprintf(f, " OpenSSL");
808 #endif
809 #endif
810 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
811 fprintf(f, " translate_ip_address");
812 #endif
813 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
814 fprintf(f, " move_frozen_messages");
815 #endif
816 #ifdef WITH_CONTENT_SCAN
817 fprintf(f, " Content_Scanning");
818 #endif
819 #ifndef DISABLE_DKIM
820 fprintf(f, " DKIM");
821 #endif
822 #ifndef DISABLE_DNSSEC
823 fprintf(f, " DNSSEC");
824 #endif
825 #ifndef DISABLE_EVENT
826 fprintf(f, " Event");
827 #endif
828 #ifdef SUPPORT_I18N
829 fprintf(f, " I18N");
830 #endif
831 #ifndef DISABLE_OCSP
832 fprintf(f, " OCSP");
833 #endif
834 #ifndef DISABLE_PRDR
835 fprintf(f, " PRDR");
836 #endif
837 #ifdef SUPPORT_PROXY
838 fprintf(f, " PROXY");
839 #endif
840 #ifdef SUPPORT_SOCKS
841 fprintf(f, " SOCKS");
842 #endif
843 #ifdef EXPERIMENTAL_LMDB
844 fprintf(f, " Experimental_LMDB");
845 #endif
846 #ifdef EXPERIMENTAL_SPF
847 fprintf(f, " Experimental_SPF");
848 #endif
849 #ifdef EXPERIMENTAL_SRS
850 fprintf(f, " Experimental_SRS");
851 #endif
852 #ifdef EXPERIMENTAL_BRIGHTMAIL
853 fprintf(f, " Experimental_Brightmail");
854 #endif
855 #ifdef EXPERIMENTAL_DANE
856 fprintf(f, " Experimental_DANE");
857 #endif
858 #ifdef EXPERIMENTAL_DCC
859 fprintf(f, " Experimental_DCC");
860 #endif
861 #ifdef EXPERIMENTAL_DMARC
862 fprintf(f, " Experimental_DMARC");
863 #endif
864 #ifdef EXPERIMENTAL_DSN_INFO
865 fprintf(f, " Experimental_DSN_info");
866 #endif
867 fprintf(f, "\n");
868
869 fprintf(f, "Lookups (built-in):");
870 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
871 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
872 #endif
873 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
874 fprintf(f, " cdb");
875 #endif
876 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
877 fprintf(f, " dbm dbmjz dbmnz");
878 #endif
879 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
880 fprintf(f, " dnsdb");
881 #endif
882 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
883 fprintf(f, " dsearch");
884 #endif
885 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
886 fprintf(f, " ibase");
887 #endif
888 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
889 fprintf(f, " ldap ldapdn ldapm");
890 #endif
891 #ifdef EXPERIMENTAL_LMDB
892 fprintf(f, " lmdb");
893 #endif
894 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
895 fprintf(f, " mysql");
896 #endif
897 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
898 fprintf(f, " nis nis0");
899 #endif
900 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
901 fprintf(f, " nisplus");
902 #endif
903 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
904 fprintf(f, " oracle");
905 #endif
906 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
907 fprintf(f, " passwd");
908 #endif
909 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
910 fprintf(f, " pgsql");
911 #endif
912 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
913 fprintf(f, " redis");
914 #endif
915 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
916 fprintf(f, " sqlite");
917 #endif
918 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
919 fprintf(f, " testdb");
920 #endif
921 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
922 fprintf(f, " whoson");
923 #endif
924 fprintf(f, "\n");
925
926 fprintf(f, "Authenticators:");
927 #ifdef AUTH_CRAM_MD5
928 fprintf(f, " cram_md5");
929 #endif
930 #ifdef AUTH_CYRUS_SASL
931 fprintf(f, " cyrus_sasl");
932 #endif
933 #ifdef AUTH_DOVECOT
934 fprintf(f, " dovecot");
935 #endif
936 #ifdef AUTH_GSASL
937 fprintf(f, " gsasl");
938 #endif
939 #ifdef AUTH_HEIMDAL_GSSAPI
940 fprintf(f, " heimdal_gssapi");
941 #endif
942 #ifdef AUTH_PLAINTEXT
943 fprintf(f, " plaintext");
944 #endif
945 #ifdef AUTH_SPA
946 fprintf(f, " spa");
947 #endif
948 #ifdef AUTH_TLS
949 fprintf(f, " tls");
950 #endif
951 fprintf(f, "\n");
952
953 fprintf(f, "Routers:");
954 #ifdef ROUTER_ACCEPT
955 fprintf(f, " accept");
956 #endif
957 #ifdef ROUTER_DNSLOOKUP
958 fprintf(f, " dnslookup");
959 #endif
960 #ifdef ROUTER_IPLITERAL
961 fprintf(f, " ipliteral");
962 #endif
963 #ifdef ROUTER_IPLOOKUP
964 fprintf(f, " iplookup");
965 #endif
966 #ifdef ROUTER_MANUALROUTE
967 fprintf(f, " manualroute");
968 #endif
969 #ifdef ROUTER_QUERYPROGRAM
970 fprintf(f, " queryprogram");
971 #endif
972 #ifdef ROUTER_REDIRECT
973 fprintf(f, " redirect");
974 #endif
975 fprintf(f, "\n");
976
977 fprintf(f, "Transports:");
978 #ifdef TRANSPORT_APPENDFILE
979 fprintf(f, " appendfile");
980 #ifdef SUPPORT_MAILDIR
981 fprintf(f, "/maildir");
982 #endif
983 #ifdef SUPPORT_MAILSTORE
984 fprintf(f, "/mailstore");
985 #endif
986 #ifdef SUPPORT_MBX
987 fprintf(f, "/mbx");
988 #endif
989 #endif
990 #ifdef TRANSPORT_AUTOREPLY
991 fprintf(f, " autoreply");
992 #endif
993 #ifdef TRANSPORT_LMTP
994 fprintf(f, " lmtp");
995 #endif
996 #ifdef TRANSPORT_PIPE
997 fprintf(f, " pipe");
998 #endif
999 #ifdef TRANSPORT_SMTP
1000 fprintf(f, " smtp");
1001 #endif
1002 fprintf(f, "\n");
1003
1004 if (fixed_never_users[0] > 0)
1005 {
1006 int i;
1007 fprintf(f, "Fixed never_users: ");
1008 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1009 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1010 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1011 }
1012
1013 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1014
1015 /* Everything else is details which are only worth reporting when debugging.
1016 Perhaps the tls_version_report should move into this too. */
1017 DEBUG(D_any) do {
1018
1019 int i;
1020
1021 /* clang defines __GNUC__ (at least, for me) so test for it first */
1022 #if defined(__clang__)
1023 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1024 #elif defined(__GNUC__)
1025 fprintf(f, "Compiler: GCC [%s]\n",
1026 # ifdef __VERSION__
1027 __VERSION__
1028 # else
1029 "? unknown version ?"
1030 # endif
1031 );
1032 #else
1033 fprintf(f, "Compiler: <unknown>\n");
1034 #endif
1035
1036 #ifdef __GLIBC__
1037 fprintf(f, "Library version: Glibc: Compile: %d.%d\n",
1038 __GLIBC__, __GLIBC_MINOR__);
1039 if (__GLIBC_PREREQ(2, 1))
1040 fprintf(f, " Runtime: %s\n",
1041 gnu_get_libc_version());
1042 #endif
1043
1044 #ifdef SUPPORT_TLS
1045 tls_version_report(f);
1046 #endif
1047 #ifdef SUPPORT_I18N
1048 utf8_version_report(f);
1049 #endif
1050
1051 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1052 if (authi->version_report)
1053 (*authi->version_report)(f);
1054
1055 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1056 characters; unless it's an ancient version of PCRE in which case it
1057 is not defined. */
1058 #ifndef PCRE_PRERELEASE
1059 # define PCRE_PRERELEASE
1060 #endif
1061 #define QUOTE(X) #X
1062 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1063 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1064 " Runtime: %s\n",
1065 PCRE_MAJOR, PCRE_MINOR,
1066 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1067 pcre_version());
1068 #undef QUOTE
1069 #undef EXPAND_AND_QUOTE
1070
1071 init_lookup_list();
1072 for (i = 0; i < lookup_list_count; i++)
1073 if (lookup_list[i]->version_report)
1074 lookup_list[i]->version_report(f);
1075
1076 #ifdef WHITELIST_D_MACROS
1077 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1078 #else
1079 fprintf(f, "WHITELIST_D_MACROS unset\n");
1080 #endif
1081 #ifdef TRUSTED_CONFIG_LIST
1082 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1083 #else
1084 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1085 #endif
1086
1087 } while (0);
1088 }
1089
1090
1091 /*************************************************
1092 * Show auxiliary information about Exim *
1093 *************************************************/
1094
1095 static void
1096 show_exim_information(enum commandline_info request, FILE *stream)
1097 {
1098 const uschar **pp;
1099
1100 switch(request)
1101 {
1102 case CMDINFO_NONE:
1103 fprintf(stream, "Oops, something went wrong.\n");
1104 return;
1105 case CMDINFO_HELP:
1106 fprintf(stream,
1107 "The -bI: flag takes a string indicating which information to provide.\n"
1108 "If the string is not recognised, you'll get this help (on stderr).\n"
1109 "\n"
1110 " exim -bI:help this information\n"
1111 " exim -bI:dscp dscp value keywords known\n"
1112 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1113 );
1114 return;
1115 case CMDINFO_SIEVE:
1116 for (pp = exim_sieve_extension_list; *pp; ++pp)
1117 fprintf(stream, "%s\n", *pp);
1118 return;
1119 case CMDINFO_DSCP:
1120 dscp_list_to_stream(stream);
1121 return;
1122 }
1123 }
1124
1125
1126 /*************************************************
1127 * Quote a local part *
1128 *************************************************/
1129
1130 /* This function is used when a sender address or a From: or Sender: header
1131 line is being created from the caller's login, or from an authenticated_id. It
1132 applies appropriate quoting rules for a local part.
1133
1134 Argument: the local part
1135 Returns: the local part, quoted if necessary
1136 */
1137
1138 uschar *
1139 local_part_quote(uschar *lpart)
1140 {
1141 BOOL needs_quote = FALSE;
1142 int size, ptr;
1143 uschar *yield;
1144 uschar *t;
1145
1146 for (t = lpart; !needs_quote && *t != 0; t++)
1147 {
1148 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1149 (*t != '.' || t == lpart || t[1] == 0);
1150 }
1151
1152 if (!needs_quote) return lpart;
1153
1154 size = ptr = 0;
1155 yield = string_catn(NULL, &size, &ptr, US"\"", 1);
1156
1157 for (;;)
1158 {
1159 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1160 if (nq == NULL)
1161 {
1162 yield = string_cat(yield, &size, &ptr, lpart);
1163 break;
1164 }
1165 yield = string_catn(yield, &size, &ptr, lpart, nq - lpart);
1166 yield = string_catn(yield, &size, &ptr, US"\\", 1);
1167 yield = string_catn(yield, &size, &ptr, nq, 1);
1168 lpart = nq + 1;
1169 }
1170
1171 yield = string_catn(yield, &size, &ptr, US"\"", 1);
1172 yield[ptr] = 0;
1173 return yield;
1174 }
1175
1176
1177
1178 #ifdef USE_READLINE
1179 /*************************************************
1180 * Load readline() functions *
1181 *************************************************/
1182
1183 /* This function is called from testing executions that read data from stdin,
1184 but only when running as the calling user. Currently, only -be does this. The
1185 function loads the readline() function library and passes back the functions.
1186 On some systems, it needs the curses library, so load that too, but try without
1187 it if loading fails. All this functionality has to be requested at build time.
1188
1189 Arguments:
1190 fn_readline_ptr pointer to where to put the readline pointer
1191 fn_addhist_ptr pointer to where to put the addhistory function
1192
1193 Returns: the dlopen handle or NULL on failure
1194 */
1195
1196 static void *
1197 set_readline(char * (**fn_readline_ptr)(const char *),
1198 void (**fn_addhist_ptr)(const char *))
1199 {
1200 void *dlhandle;
1201 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1202
1203 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1204 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1205
1206 if (dlhandle != NULL)
1207 {
1208 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1209 * char * readline (const char *prompt);
1210 * void add_history (const char *string);
1211 */
1212 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1213 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1214 }
1215 else
1216 {
1217 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1218 }
1219
1220 return dlhandle;
1221 }
1222 #endif
1223
1224
1225
1226 /*************************************************
1227 * Get a line from stdin for testing things *
1228 *************************************************/
1229
1230 /* This function is called when running tests that can take a number of lines
1231 of input (for example, -be and -bt). It handles continuations and trailing
1232 spaces. And prompting and a blank line output on eof. If readline() is in use,
1233 the arguments are non-NULL and provide the relevant functions.
1234
1235 Arguments:
1236 fn_readline readline function or NULL
1237 fn_addhist addhist function or NULL
1238
1239 Returns: pointer to dynamic memory, or NULL at end of file
1240 */
1241
1242 static uschar *
1243 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1244 {
1245 int i;
1246 int size = 0;
1247 int ptr = 0;
1248 uschar *yield = NULL;
1249
1250 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1251
1252 for (i = 0;; i++)
1253 {
1254 uschar buffer[1024];
1255 uschar *p, *ss;
1256
1257 #ifdef USE_READLINE
1258 char *readline_line = NULL;
1259 if (fn_readline != NULL)
1260 {
1261 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1262 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1263 p = US readline_line;
1264 }
1265 else
1266 #endif
1267
1268 /* readline() not in use */
1269
1270 {
1271 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1272 p = buffer;
1273 }
1274
1275 /* Handle the line */
1276
1277 ss = p + (int)Ustrlen(p);
1278 while (ss > p && isspace(ss[-1])) ss--;
1279
1280 if (i > 0)
1281 {
1282 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1283 }
1284
1285 yield = string_catn(yield, &size, &ptr, p, ss - p);
1286
1287 #ifdef USE_READLINE
1288 if (fn_readline != NULL) free(readline_line);
1289 #endif
1290
1291 /* yield can only be NULL if ss==p */
1292 if (ss == p || yield[ptr-1] != '\\')
1293 {
1294 if (yield) yield[ptr] = 0;
1295 break;
1296 }
1297 yield[--ptr] = 0;
1298 }
1299
1300 if (yield == NULL) printf("\n");
1301 return yield;
1302 }
1303
1304
1305
1306 /*************************************************
1307 * Output usage information for the program *
1308 *************************************************/
1309
1310 /* This function is called when there are no recipients
1311 or a specific --help argument was added.
1312
1313 Arguments:
1314 progname information on what name we were called by
1315
1316 Returns: DOES NOT RETURN
1317 */
1318
1319 static void
1320 exim_usage(uschar *progname)
1321 {
1322
1323 /* Handle specific program invocation varients */
1324 if (Ustrcmp(progname, US"-mailq") == 0)
1325 {
1326 fprintf(stderr,
1327 "mailq - list the contents of the mail queue\n\n"
1328 "For a list of options, see the Exim documentation.\n");
1329 exit(EXIT_FAILURE);
1330 }
1331
1332 /* Generic usage - we output this whatever happens */
1333 fprintf(stderr,
1334 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1335 "not directly from a shell command line. Options and/or arguments control\n"
1336 "what it does when called. For a list of options, see the Exim documentation.\n");
1337
1338 exit(EXIT_FAILURE);
1339 }
1340
1341
1342
1343 /*************************************************
1344 * Validate that the macros given are okay *
1345 *************************************************/
1346
1347 /* Typically, Exim will drop privileges if macros are supplied. In some
1348 cases, we want to not do so.
1349
1350 Arguments: none (macros is a global)
1351 Returns: true if trusted, false otherwise
1352 */
1353
1354 static BOOL
1355 macros_trusted(void)
1356 {
1357 #ifdef WHITELIST_D_MACROS
1358 macro_item *m;
1359 uschar *whitelisted, *end, *p, **whites, **w;
1360 int white_count, i, n;
1361 size_t len;
1362 BOOL prev_char_item, found;
1363 #endif
1364
1365 if (macros == NULL)
1366 return TRUE;
1367 #ifndef WHITELIST_D_MACROS
1368 return FALSE;
1369 #else
1370
1371 /* We only trust -D overrides for some invoking users:
1372 root, the exim run-time user, the optional config owner user.
1373 I don't know why config-owner would be needed, but since they can own the
1374 config files anyway, there's no security risk to letting them override -D. */
1375 if ( ! ((real_uid == root_uid)
1376 || (real_uid == exim_uid)
1377 #ifdef CONFIGURE_OWNER
1378 || (real_uid == config_uid)
1379 #endif
1380 ))
1381 {
1382 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1383 return FALSE;
1384 }
1385
1386 /* Get a list of macros which are whitelisted */
1387 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1388 prev_char_item = FALSE;
1389 white_count = 0;
1390 for (p = whitelisted; *p != '\0'; ++p)
1391 {
1392 if (*p == ':' || isspace(*p))
1393 {
1394 *p = '\0';
1395 if (prev_char_item)
1396 ++white_count;
1397 prev_char_item = FALSE;
1398 continue;
1399 }
1400 if (!prev_char_item)
1401 prev_char_item = TRUE;
1402 }
1403 end = p;
1404 if (prev_char_item)
1405 ++white_count;
1406 if (!white_count)
1407 return FALSE;
1408 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1409 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1410 {
1411 if (*p != '\0')
1412 {
1413 whites[i++] = p;
1414 if (i == white_count)
1415 break;
1416 while (*p != '\0' && p < end)
1417 ++p;
1418 }
1419 }
1420 whites[i] = NULL;
1421
1422 /* The list of macros should be very short. Accept the N*M complexity. */
1423 for (m = macros; m != NULL; m = m->next)
1424 {
1425 found = FALSE;
1426 for (w = whites; *w; ++w)
1427 if (Ustrcmp(*w, m->name) == 0)
1428 {
1429 found = TRUE;
1430 break;
1431 }
1432 if (!found)
1433 return FALSE;
1434 if (m->replacement == NULL)
1435 continue;
1436 len = Ustrlen(m->replacement);
1437 if (len == 0)
1438 continue;
1439 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1440 0, PCRE_EOPT, NULL, 0);
1441 if (n < 0)
1442 {
1443 if (n != PCRE_ERROR_NOMATCH)
1444 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1445 return FALSE;
1446 }
1447 }
1448 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1449 return TRUE;
1450 #endif
1451 }
1452
1453
1454 /*************************************************
1455 * Entry point and high-level code *
1456 *************************************************/
1457
1458 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1459 the appropriate action. All the necessary functions are present in the one
1460 binary. I originally thought one should split it up, but it turns out that so
1461 much of the apparatus is needed in each chunk that one might as well just have
1462 it all available all the time, which then makes the coding easier as well.
1463
1464 Arguments:
1465 argc count of entries in argv
1466 argv argument strings, with argv[0] being the program name
1467
1468 Returns: EXIT_SUCCESS if terminated successfully
1469 EXIT_FAILURE otherwise, except when a message has been sent
1470 to the sender, and -oee was given
1471 */
1472
1473 int
1474 main(int argc, char **cargv)
1475 {
1476 uschar **argv = USS cargv;
1477 int arg_receive_timeout = -1;
1478 int arg_smtp_receive_timeout = -1;
1479 int arg_error_handling = error_handling;
1480 int filter_sfd = -1;
1481 int filter_ufd = -1;
1482 int group_count;
1483 int i, rv;
1484 int list_queue_option = 0;
1485 int msg_action = 0;
1486 int msg_action_arg = -1;
1487 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1488 int queue_only_reason = 0;
1489 #ifdef EXIM_PERL
1490 int perl_start_option = 0;
1491 #endif
1492 int recipients_arg = argc;
1493 int sender_address_domain = 0;
1494 int test_retry_arg = -1;
1495 int test_rewrite_arg = -1;
1496 BOOL arg_queue_only = FALSE;
1497 BOOL bi_option = FALSE;
1498 BOOL checking = FALSE;
1499 BOOL count_queue = FALSE;
1500 BOOL expansion_test = FALSE;
1501 BOOL extract_recipients = FALSE;
1502 BOOL flag_G = FALSE;
1503 BOOL flag_n = FALSE;
1504 BOOL forced_delivery = FALSE;
1505 BOOL f_end_dot = FALSE;
1506 BOOL deliver_give_up = FALSE;
1507 BOOL list_queue = FALSE;
1508 BOOL list_options = FALSE;
1509 BOOL list_config = FALSE;
1510 BOOL local_queue_only;
1511 BOOL more = TRUE;
1512 BOOL one_msg_action = FALSE;
1513 BOOL opt_D_used = FALSE;
1514 BOOL queue_only_set = FALSE;
1515 BOOL receiving_message = TRUE;
1516 BOOL sender_ident_set = FALSE;
1517 BOOL session_local_queue_only;
1518 BOOL unprivileged;
1519 BOOL removed_privilege = FALSE;
1520 BOOL usage_wanted = FALSE;
1521 BOOL verify_address_mode = FALSE;
1522 BOOL verify_as_sender = FALSE;
1523 BOOL version_printed = FALSE;
1524 uschar *alias_arg = NULL;
1525 uschar *called_as = US"";
1526 uschar *cmdline_syslog_name = NULL;
1527 uschar *start_queue_run_id = NULL;
1528 uschar *stop_queue_run_id = NULL;
1529 uschar *expansion_test_message = NULL;
1530 uschar *ftest_domain = NULL;
1531 uschar *ftest_localpart = NULL;
1532 uschar *ftest_prefix = NULL;
1533 uschar *ftest_suffix = NULL;
1534 uschar *log_oneline = NULL;
1535 uschar *malware_test_file = NULL;
1536 uschar *real_sender_address;
1537 uschar *originator_home = US"/";
1538 size_t sz;
1539 void *reset_point;
1540
1541 struct passwd *pw;
1542 struct stat statbuf;
1543 pid_t passed_qr_pid = (pid_t)0;
1544 int passed_qr_pipe = -1;
1545 gid_t group_list[NGROUPS_MAX];
1546
1547 /* For the -bI: flag */
1548 enum commandline_info info_flag = CMDINFO_NONE;
1549 BOOL info_stdout = FALSE;
1550
1551 /* Possible options for -R and -S */
1552
1553 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1554
1555 /* Need to define this in case we need to change the environment in order
1556 to get rid of a bogus time zone. We have to make it char rather than uschar
1557 because some OS define it in /usr/include/unistd.h. */
1558
1559 extern char **environ;
1560
1561 /* If the Exim user and/or group and/or the configuration file owner/group were
1562 defined by ref:name at build time, we must now find the actual uid/gid values.
1563 This is a feature to make the lives of binary distributors easier. */
1564
1565 #ifdef EXIM_USERNAME
1566 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1567 {
1568 if (exim_uid == 0)
1569 {
1570 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1571 EXIM_USERNAME);
1572 exit(EXIT_FAILURE);
1573 }
1574 /* If ref:name uses a number as the name, route_finduser() returns
1575 TRUE with exim_uid set and pw coerced to NULL. */
1576 if (pw)
1577 exim_gid = pw->pw_gid;
1578 #ifndef EXIM_GROUPNAME
1579 else
1580 {
1581 fprintf(stderr,
1582 "exim: ref:name should specify a usercode, not a group.\n"
1583 "exim: can't let you get away with it unless you also specify a group.\n");
1584 exit(EXIT_FAILURE);
1585 }
1586 #endif
1587 }
1588 else
1589 {
1590 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1591 EXIM_USERNAME);
1592 exit(EXIT_FAILURE);
1593 }
1594 #endif
1595
1596 #ifdef EXIM_GROUPNAME
1597 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1598 {
1599 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1600 EXIM_GROUPNAME);
1601 exit(EXIT_FAILURE);
1602 }
1603 #endif
1604
1605 #ifdef CONFIGURE_OWNERNAME
1606 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1607 {
1608 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1609 CONFIGURE_OWNERNAME);
1610 exit(EXIT_FAILURE);
1611 }
1612 #endif
1613
1614 /* We default the system_filter_user to be the Exim run-time user, as a
1615 sane non-root value. */
1616 system_filter_uid = exim_uid;
1617
1618 #ifdef CONFIGURE_GROUPNAME
1619 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1620 {
1621 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1622 CONFIGURE_GROUPNAME);
1623 exit(EXIT_FAILURE);
1624 }
1625 #endif
1626
1627 /* In the Cygwin environment, some initialization used to need doing.
1628 It was fudged in by means of this macro; now no longer but we'll leave
1629 it in case of others. */
1630
1631 #ifdef OS_INIT
1632 OS_INIT
1633 #endif
1634
1635 /* Check a field which is patched when we are running Exim within its
1636 testing harness; do a fast initial check, and then the whole thing. */
1637
1638 running_in_test_harness =
1639 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1640
1641 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1642 at the start of a program; however, it seems that some environments do not
1643 follow this. A "strange" locale can affect the formatting of timestamps, so we
1644 make quite sure. */
1645
1646 setlocale(LC_ALL, "C");
1647
1648 /* Set up the default handler for timing using alarm(). */
1649
1650 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1651
1652 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1653 because store_malloc writes a log entry on failure. */
1654
1655 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1656 {
1657 fprintf(stderr, "exim: failed to get store for log buffer\n");
1658 exit(EXIT_FAILURE);
1659 }
1660
1661 /* Initialize the default log options. */
1662
1663 bits_set(log_selector, log_selector_size, log_default);
1664
1665 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1666 NULL when the daemon is run and the file is closed. We have to use this
1667 indirection, because some systems don't allow writing to the variable "stderr".
1668 */
1669
1670 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1671
1672 /* Arrange for the PCRE regex library to use our store functions. Note that
1673 the normal calls are actually macros that add additional arguments for
1674 debugging purposes so we have to assign specially constructed functions here.
1675 The default is to use store in the stacking pool, but this is overridden in the
1676 regex_must_compile() function. */
1677
1678 pcre_malloc = function_store_get;
1679 pcre_free = function_dummy_free;
1680
1681 /* Ensure there is a big buffer for temporary use in several places. It is put
1682 in malloc store so that it can be freed for enlargement if necessary. */
1683
1684 big_buffer = store_malloc(big_buffer_size);
1685
1686 /* Set up the handler for the data request signal, and set the initial
1687 descriptive text. */
1688
1689 set_process_info("initializing");
1690 readconf_features();
1691 readconf_options();
1692 os_restarting_signal(SIGUSR1, usr1_handler);
1693
1694 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1695 in the daemon code. For the rest of Exim's uses, we ignore it. */
1696
1697 signal(SIGHUP, SIG_IGN);
1698
1699 /* We don't want to die on pipe errors as the code is written to handle
1700 the write error instead. */
1701
1702 signal(SIGPIPE, SIG_IGN);
1703
1704 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1705 set to SIG_IGN. This causes subprocesses that complete before the parent
1706 process waits for them not to hang around, so when Exim calls wait(), nothing
1707 is there. The wait() code has been made robust against this, but let's ensure
1708 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1709 ending status. We use sigaction rather than plain signal() on those OS where
1710 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1711 problem on AIX with this.) */
1712
1713 #ifdef SA_NOCLDWAIT
1714 {
1715 struct sigaction act;
1716 act.sa_handler = SIG_DFL;
1717 sigemptyset(&(act.sa_mask));
1718 act.sa_flags = 0;
1719 sigaction(SIGCHLD, &act, NULL);
1720 }
1721 #else
1722 signal(SIGCHLD, SIG_DFL);
1723 #endif
1724
1725 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1726 SIGHUP. */
1727
1728 sighup_argv = argv;
1729
1730 /* Set up the version number. Set up the leading 'E' for the external form of
1731 message ids, set the pointer to the internal form, and initialize it to
1732 indicate no message being processed. */
1733
1734 version_init();
1735 message_id_option[0] = '-';
1736 message_id_external = message_id_option + 1;
1737 message_id_external[0] = 'E';
1738 message_id = message_id_external + 1;
1739 message_id[0] = 0;
1740
1741 /* Set the umask to zero so that any files Exim creates using open() are
1742 created with the modes that it specifies. NOTE: Files created with fopen() have
1743 a problem, which was not recognized till rather late (February 2006). With this
1744 umask, such files will be world writeable. (They are all content scanning files
1745 in the spool directory, which isn't world-accessible, so this is not a
1746 disaster, but it's untidy.) I don't want to change this overall setting,
1747 however, because it will interact badly with the open() calls. Instead, there's
1748 now a function called modefopen() that fiddles with the umask while calling
1749 fopen(). */
1750
1751 (void)umask(0);
1752
1753 /* Precompile the regular expression for matching a message id. Keep this in
1754 step with the code that generates ids in the accept.c module. We need to do
1755 this here, because the -M options check their arguments for syntactic validity
1756 using mac_ismsgid, which uses this. */
1757
1758 regex_ismsgid =
1759 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1760
1761 /* Precompile the regular expression that is used for matching an SMTP error
1762 code, possibly extended, at the start of an error message. Note that the
1763 terminating whitespace character is included. */
1764
1765 regex_smtp_code =
1766 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1767 FALSE, TRUE);
1768
1769 #ifdef WHITELIST_D_MACROS
1770 /* Precompile the regular expression used to filter the content of macros
1771 given to -D for permissibility. */
1772
1773 regex_whitelisted_macro =
1774 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1775 #endif
1776
1777 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1778
1779 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1780 this seems to be a generally accepted convention, since one finds symbolic
1781 links called "mailq" in standard OS configurations. */
1782
1783 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1784 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1785 {
1786 list_queue = TRUE;
1787 receiving_message = FALSE;
1788 called_as = US"-mailq";
1789 }
1790
1791 /* If the program is called as "rmail" treat it as equivalent to
1792 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1793 i.e. preventing a single dot on a line from terminating the message, and
1794 returning with zero return code, even in cases of error (provided an error
1795 message has been sent). */
1796
1797 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1798 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1799 {
1800 dot_ends = FALSE;
1801 called_as = US"-rmail";
1802 errors_sender_rc = EXIT_SUCCESS;
1803 }
1804
1805 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1806 this is a smail convention. */
1807
1808 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1809 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1810 {
1811 smtp_input = smtp_batched_input = TRUE;
1812 called_as = US"-rsmtp";
1813 }
1814
1815 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1816 this is a smail convention. */
1817
1818 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1819 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1820 {
1821 queue_interval = 0;
1822 receiving_message = FALSE;
1823 called_as = US"-runq";
1824 }
1825
1826 /* If the program is called as "newaliases" treat it as equivalent to
1827 "exim -bi"; this is a sendmail convention. */
1828
1829 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1830 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1831 {
1832 bi_option = TRUE;
1833 receiving_message = FALSE;
1834 called_as = US"-newaliases";
1835 }
1836
1837 /* Save the original effective uid for a couple of uses later. It should
1838 normally be root, but in some esoteric environments it may not be. */
1839
1840 original_euid = geteuid();
1841
1842 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1843 to be the same as the real ones. This makes a difference only if Exim is setuid
1844 (or setgid) to something other than root, which could be the case in some
1845 special configurations. */
1846
1847 real_uid = getuid();
1848 real_gid = getgid();
1849
1850 if (real_uid == root_uid)
1851 {
1852 rv = setgid(real_gid);
1853 if (rv)
1854 {
1855 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1856 (long int)real_gid, strerror(errno));
1857 exit(EXIT_FAILURE);
1858 }
1859 rv = setuid(real_uid);
1860 if (rv)
1861 {
1862 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1863 (long int)real_uid, strerror(errno));
1864 exit(EXIT_FAILURE);
1865 }
1866 }
1867
1868 /* If neither the original real uid nor the original euid was root, Exim is
1869 running in an unprivileged state. */
1870
1871 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1872
1873 /* Scan the program's arguments. Some can be dealt with right away; others are
1874 simply recorded for checking and handling afterwards. Do a high-level switch
1875 on the second character (the one after '-'), to save some effort. */
1876
1877 for (i = 1; i < argc; i++)
1878 {
1879 BOOL badarg = FALSE;
1880 uschar *arg = argv[i];
1881 uschar *argrest;
1882 int switchchar;
1883
1884 /* An argument not starting with '-' is the start of a recipients list;
1885 break out of the options-scanning loop. */
1886
1887 if (arg[0] != '-')
1888 {
1889 recipients_arg = i;
1890 break;
1891 }
1892
1893 /* An option consistion of -- terminates the options */
1894
1895 if (Ustrcmp(arg, "--") == 0)
1896 {
1897 recipients_arg = i + 1;
1898 break;
1899 }
1900
1901 /* Handle flagged options */
1902
1903 switchchar = arg[1];
1904 argrest = arg+2;
1905
1906 /* Make all -ex options synonymous with -oex arguments, since that
1907 is assumed by various callers. Also make -qR options synonymous with -R
1908 options, as that seems to be required as well. Allow for -qqR too, and
1909 the same for -S options. */
1910
1911 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1912 Ustrncmp(arg+1, "qR", 2) == 0 ||
1913 Ustrncmp(arg+1, "qS", 2) == 0)
1914 {
1915 switchchar = arg[2];
1916 argrest++;
1917 }
1918 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1919 {
1920 switchchar = arg[3];
1921 argrest += 2;
1922 queue_2stage = TRUE;
1923 }
1924
1925 /* Make -r synonymous with -f, since it is a documented alias */
1926
1927 else if (arg[1] == 'r') switchchar = 'f';
1928
1929 /* Make -ov synonymous with -v */
1930
1931 else if (Ustrcmp(arg, "-ov") == 0)
1932 {
1933 switchchar = 'v';
1934 argrest++;
1935 }
1936
1937 /* deal with --option_aliases */
1938 else if (switchchar == '-')
1939 {
1940 if (Ustrcmp(argrest, "help") == 0)
1941 {
1942 usage_wanted = TRUE;
1943 break;
1944 }
1945 else if (Ustrcmp(argrest, "version") == 0)
1946 {
1947 switchchar = 'b';
1948 argrest = US"V";
1949 }
1950 }
1951
1952 /* High-level switch on active initial letter */
1953
1954 switch(switchchar)
1955 {
1956
1957 /* sendmail uses -Ac and -Am to control which .cf file is used;
1958 we ignore them. */
1959 case 'A':
1960 if (*argrest == '\0') { badarg = TRUE; break; }
1961 else
1962 {
1963 BOOL ignore = FALSE;
1964 switch (*argrest)
1965 {
1966 case 'c':
1967 case 'm':
1968 if (*(argrest + 1) == '\0')
1969 ignore = TRUE;
1970 break;
1971 }
1972 if (!ignore) { badarg = TRUE; break; }
1973 }
1974 break;
1975
1976 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1977 so has no need of it. */
1978
1979 case 'B':
1980 if (*argrest == 0) i++; /* Skip over the type */
1981 break;
1982
1983
1984 case 'b':
1985 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1986
1987 /* -bd: Run in daemon mode, awaiting SMTP connections.
1988 -bdf: Ditto, but in the foreground.
1989 */
1990
1991 if (*argrest == 'd')
1992 {
1993 daemon_listen = TRUE;
1994 if (*(++argrest) == 'f') background_daemon = FALSE;
1995 else if (*argrest != 0) { badarg = TRUE; break; }
1996 }
1997
1998 /* -be: Run in expansion test mode
1999 -bem: Ditto, but read a message from a file first
2000 */
2001
2002 else if (*argrest == 'e')
2003 {
2004 expansion_test = checking = TRUE;
2005 if (argrest[1] == 'm')
2006 {
2007 if (++i >= argc) { badarg = TRUE; break; }
2008 expansion_test_message = argv[i];
2009 argrest++;
2010 }
2011 if (argrest[1] != 0) { badarg = TRUE; break; }
2012 }
2013
2014 /* -bF: Run system filter test */
2015
2016 else if (*argrest == 'F')
2017 {
2018 filter_test |= checking = FTEST_SYSTEM;
2019 if (*(++argrest) != 0) { badarg = TRUE; break; }
2020 if (++i < argc) filter_test_sfile = argv[i]; else
2021 {
2022 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2023 exit(EXIT_FAILURE);
2024 }
2025 }
2026
2027 /* -bf: Run user filter test
2028 -bfd: Set domain for filter testing
2029 -bfl: Set local part for filter testing
2030 -bfp: Set prefix for filter testing
2031 -bfs: Set suffix for filter testing
2032 */
2033
2034 else if (*argrest == 'f')
2035 {
2036 if (*(++argrest) == 0)
2037 {
2038 filter_test |= checking = FTEST_USER;
2039 if (++i < argc) filter_test_ufile = argv[i]; else
2040 {
2041 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2042 exit(EXIT_FAILURE);
2043 }
2044 }
2045 else
2046 {
2047 if (++i >= argc)
2048 {
2049 fprintf(stderr, "exim: string expected after %s\n", arg);
2050 exit(EXIT_FAILURE);
2051 }
2052 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2053 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2054 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2055 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2056 else { badarg = TRUE; break; }
2057 }
2058 }
2059
2060 /* -bh: Host checking - an IP address must follow. */
2061
2062 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2063 {
2064 if (++i >= argc) { badarg = TRUE; break; }
2065 sender_host_address = argv[i];
2066 host_checking = checking = log_testing_mode = TRUE;
2067 host_checking_callout = argrest[1] == 'c';
2068 message_logs = FALSE;
2069 }
2070
2071 /* -bi: This option is used by sendmail to initialize *the* alias file,
2072 though it has the -oA option to specify a different file. Exim has no
2073 concept of *the* alias file, but since Sun's YP make script calls
2074 sendmail this way, some support must be provided. */
2075
2076 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2077
2078 /* -bI: provide information, of the type to follow after a colon.
2079 This is an Exim flag. */
2080
2081 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2082 {
2083 uschar *p = &argrest[2];
2084 info_flag = CMDINFO_HELP;
2085 if (Ustrlen(p))
2086 {
2087 if (strcmpic(p, CUS"sieve") == 0)
2088 {
2089 info_flag = CMDINFO_SIEVE;
2090 info_stdout = TRUE;
2091 }
2092 else if (strcmpic(p, CUS"dscp") == 0)
2093 {
2094 info_flag = CMDINFO_DSCP;
2095 info_stdout = TRUE;
2096 }
2097 else if (strcmpic(p, CUS"help") == 0)
2098 {
2099 info_stdout = TRUE;
2100 }
2101 }
2102 }
2103
2104 /* -bm: Accept and deliver message - the default option. Reinstate
2105 receiving_message, which got turned off for all -b options. */
2106
2107 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2108
2109 /* -bmalware: test the filename given for malware */
2110
2111 else if (Ustrcmp(argrest, "malware") == 0)
2112 {
2113 if (++i >= argc) { badarg = TRUE; break; }
2114 checking = TRUE;
2115 malware_test_file = argv[i];
2116 }
2117
2118 /* -bnq: For locally originating messages, do not qualify unqualified
2119 addresses. In the envelope, this causes errors; in header lines they
2120 just get left. */
2121
2122 else if (Ustrcmp(argrest, "nq") == 0)
2123 {
2124 allow_unqualified_sender = FALSE;
2125 allow_unqualified_recipient = FALSE;
2126 }
2127
2128 /* -bpxx: List the contents of the mail queue, in various forms. If
2129 the option is -bpc, just a queue count is needed. Otherwise, if the
2130 first letter after p is r, then order is random. */
2131
2132 else if (*argrest == 'p')
2133 {
2134 if (*(++argrest) == 'c')
2135 {
2136 count_queue = TRUE;
2137 if (*(++argrest) != 0) badarg = TRUE;
2138 break;
2139 }
2140
2141 if (*argrest == 'r')
2142 {
2143 list_queue_option = 8;
2144 argrest++;
2145 }
2146 else list_queue_option = 0;
2147
2148 list_queue = TRUE;
2149
2150 /* -bp: List the contents of the mail queue, top-level only */
2151
2152 if (*argrest == 0) {}
2153
2154 /* -bpu: List the contents of the mail queue, top-level undelivered */
2155
2156 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2157
2158 /* -bpa: List the contents of the mail queue, including all delivered */
2159
2160 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2161
2162 /* Unknown after -bp[r] */
2163
2164 else
2165 {
2166 badarg = TRUE;
2167 break;
2168 }
2169 }
2170
2171
2172 /* -bP: List the configuration variables given as the address list.
2173 Force -v, so configuration errors get displayed. */
2174
2175 else if (Ustrcmp(argrest, "P") == 0)
2176 {
2177 /* -bP config: we need to setup here, because later,
2178 * when list_options is checked, the config is read already */
2179 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2180 {
2181 list_config = TRUE;
2182 readconf_save_config(version_string);
2183 }
2184 else
2185 {
2186 list_options = TRUE;
2187 debug_selector |= D_v;
2188 debug_file = stderr;
2189 }
2190 }
2191
2192 /* -brt: Test retry configuration lookup */
2193
2194 else if (Ustrcmp(argrest, "rt") == 0)
2195 {
2196 checking = TRUE;
2197 test_retry_arg = i + 1;
2198 goto END_ARG;
2199 }
2200
2201 /* -brw: Test rewrite configuration */
2202
2203 else if (Ustrcmp(argrest, "rw") == 0)
2204 {
2205 checking = TRUE;
2206 test_rewrite_arg = i + 1;
2207 goto END_ARG;
2208 }
2209
2210 /* -bS: Read SMTP commands on standard input, but produce no replies -
2211 all errors are reported by sending messages. */
2212
2213 else if (Ustrcmp(argrest, "S") == 0)
2214 smtp_input = smtp_batched_input = receiving_message = TRUE;
2215
2216 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2217 on standard output. */
2218
2219 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2220
2221 /* -bt: address testing mode */
2222
2223 else if (Ustrcmp(argrest, "t") == 0)
2224 address_test_mode = checking = log_testing_mode = TRUE;
2225
2226 /* -bv: verify addresses */
2227
2228 else if (Ustrcmp(argrest, "v") == 0)
2229 verify_address_mode = checking = log_testing_mode = TRUE;
2230
2231 /* -bvs: verify sender addresses */
2232
2233 else if (Ustrcmp(argrest, "vs") == 0)
2234 {
2235 verify_address_mode = checking = log_testing_mode = TRUE;
2236 verify_as_sender = TRUE;
2237 }
2238
2239 /* -bV: Print version string and support details */
2240
2241 else if (Ustrcmp(argrest, "V") == 0)
2242 {
2243 printf("Exim version %s #%s built %s\n", version_string,
2244 version_cnumber, version_date);
2245 printf("%s\n", CS version_copyright);
2246 version_printed = TRUE;
2247 show_whats_supported(stdout);
2248 log_testing_mode = TRUE;
2249 }
2250
2251 /* -bw: inetd wait mode, accept a listening socket as stdin */
2252
2253 else if (*argrest == 'w')
2254 {
2255 inetd_wait_mode = TRUE;
2256 background_daemon = FALSE;
2257 daemon_listen = TRUE;
2258 if (*(++argrest) != '\0')
2259 {
2260 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2261 if (inetd_wait_timeout <= 0)
2262 {
2263 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2264 exit(EXIT_FAILURE);
2265 }
2266 }
2267 }
2268
2269 else badarg = TRUE;
2270 break;
2271
2272
2273 /* -C: change configuration file list; ignore if it isn't really
2274 a change! Enforce a prefix check if required. */
2275
2276 case 'C':
2277 if (*argrest == 0)
2278 {
2279 if(++i < argc) argrest = argv[i]; else
2280 { badarg = TRUE; break; }
2281 }
2282 if (Ustrcmp(config_main_filelist, argrest) != 0)
2283 {
2284 #ifdef ALT_CONFIG_PREFIX
2285 int sep = 0;
2286 int len = Ustrlen(ALT_CONFIG_PREFIX);
2287 uschar *list = argrest;
2288 uschar *filename;
2289 while((filename = string_nextinlist(&list, &sep, big_buffer,
2290 big_buffer_size)) != NULL)
2291 {
2292 if ((Ustrlen(filename) < len ||
2293 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2294 Ustrstr(filename, "/../") != NULL) &&
2295 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2296 {
2297 fprintf(stderr, "-C Permission denied\n");
2298 exit(EXIT_FAILURE);
2299 }
2300 }
2301 #endif
2302 if (real_uid != root_uid)
2303 {
2304 #ifdef TRUSTED_CONFIG_LIST
2305
2306 if (real_uid != exim_uid
2307 #ifdef CONFIGURE_OWNER
2308 && real_uid != config_uid
2309 #endif
2310 )
2311 trusted_config = FALSE;
2312 else
2313 {
2314 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2315 if (trust_list)
2316 {
2317 struct stat statbuf;
2318
2319 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2320 (statbuf.st_uid != root_uid /* owner not root */
2321 #ifdef CONFIGURE_OWNER
2322 && statbuf.st_uid != config_uid /* owner not the special one */
2323 #endif
2324 ) || /* or */
2325 (statbuf.st_gid != root_gid /* group not root */
2326 #ifdef CONFIGURE_GROUP
2327 && statbuf.st_gid != config_gid /* group not the special one */
2328 #endif
2329 && (statbuf.st_mode & 020) != 0 /* group writeable */
2330 ) || /* or */
2331 (statbuf.st_mode & 2) != 0) /* world writeable */
2332 {
2333 trusted_config = FALSE;
2334 fclose(trust_list);
2335 }
2336 else
2337 {
2338 /* Well, the trust list at least is up to scratch... */
2339 void *reset_point = store_get(0);
2340 uschar *trusted_configs[32];
2341 int nr_configs = 0;
2342 int i = 0;
2343
2344 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2345 {
2346 uschar *start = big_buffer, *nl;
2347 while (*start && isspace(*start))
2348 start++;
2349 if (*start != '/')
2350 continue;
2351 nl = Ustrchr(start, '\n');
2352 if (nl)
2353 *nl = 0;
2354 trusted_configs[nr_configs++] = string_copy(start);
2355 if (nr_configs == 32)
2356 break;
2357 }
2358 fclose(trust_list);
2359
2360 if (nr_configs)
2361 {
2362 int sep = 0;
2363 const uschar *list = argrest;
2364 uschar *filename;
2365 while (trusted_config && (filename = string_nextinlist(&list,
2366 &sep, big_buffer, big_buffer_size)) != NULL)
2367 {
2368 for (i=0; i < nr_configs; i++)
2369 {
2370 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2371 break;
2372 }
2373 if (i == nr_configs)
2374 {
2375 trusted_config = FALSE;
2376 break;
2377 }
2378 }
2379 store_reset(reset_point);
2380 }
2381 else
2382 {
2383 /* No valid prefixes found in trust_list file. */
2384 trusted_config = FALSE;
2385 }
2386 }
2387 }
2388 else
2389 {
2390 /* Could not open trust_list file. */
2391 trusted_config = FALSE;
2392 }
2393 }
2394 #else
2395 /* Not root; don't trust config */
2396 trusted_config = FALSE;
2397 #endif
2398 }
2399
2400 config_main_filelist = argrest;
2401 config_changed = TRUE;
2402 }
2403 break;
2404
2405
2406 /* -D: set up a macro definition */
2407
2408 case 'D':
2409 #ifdef DISABLE_D_OPTION
2410 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2411 exit(EXIT_FAILURE);
2412 #else
2413 {
2414 int ptr = 0;
2415 macro_item *mlast = NULL;
2416 macro_item *m;
2417 uschar name[24];
2418 uschar *s = argrest;
2419
2420 opt_D_used = TRUE;
2421 while (isspace(*s)) s++;
2422
2423 if (*s < 'A' || *s > 'Z')
2424 {
2425 fprintf(stderr, "exim: macro name set by -D must start with "
2426 "an upper case letter\n");
2427 exit(EXIT_FAILURE);
2428 }
2429
2430 while (isalnum(*s) || *s == '_')
2431 {
2432 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2433 s++;
2434 }
2435 name[ptr] = 0;
2436 if (ptr == 0) { badarg = TRUE; break; }
2437 while (isspace(*s)) s++;
2438 if (*s != 0)
2439 {
2440 if (*s++ != '=') { badarg = TRUE; break; }
2441 while (isspace(*s)) s++;
2442 }
2443
2444 for (m = macros; m != NULL; m = m->next)
2445 {
2446 if (Ustrcmp(m->name, name) == 0)
2447 {
2448 fprintf(stderr, "exim: duplicated -D in command line\n");
2449 exit(EXIT_FAILURE);
2450 }
2451 mlast = m;
2452 }
2453
2454 m = store_get(sizeof(macro_item) + Ustrlen(name));
2455 m->next = NULL;
2456 m->command_line = TRUE;
2457 if (mlast == NULL) macros = m; else mlast->next = m;
2458 Ustrcpy(m->name, name);
2459 m->replacement = string_copy(s);
2460
2461 if (clmacro_count >= MAX_CLMACROS)
2462 {
2463 fprintf(stderr, "exim: too many -D options on command line\n");
2464 exit(EXIT_FAILURE);
2465 }
2466 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2467 m->replacement);
2468 }
2469 #endif
2470 break;
2471
2472 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2473 The latter is now a no-op, retained for compatibility only. If -dd is used,
2474 debugging subprocesses of the daemon is disabled. */
2475
2476 case 'd':
2477 if (Ustrcmp(argrest, "ropcr") == 0)
2478 {
2479 /* drop_cr = TRUE; */
2480 }
2481
2482 /* Use an intermediate variable so that we don't set debugging while
2483 decoding the debugging bits. */
2484
2485 else
2486 {
2487 unsigned int selector = D_default;
2488 debug_selector = 0;
2489 debug_file = NULL;
2490 if (*argrest == 'd')
2491 {
2492 debug_daemon = TRUE;
2493 argrest++;
2494 }
2495 if (*argrest != 0)
2496 decode_bits(&selector, 1, debug_notall, argrest,
2497 debug_options, debug_options_count, US"debug", 0);
2498 debug_selector = selector;
2499 }
2500 break;
2501
2502
2503 /* -E: This is a local error message. This option is not intended for
2504 external use at all, but is not restricted to trusted callers because it
2505 does no harm (just suppresses certain error messages) and if Exim is run
2506 not setuid root it won't always be trusted when it generates error
2507 messages using this option. If there is a message id following -E, point
2508 message_reference at it, for logging. */
2509
2510 case 'E':
2511 local_error_message = TRUE;
2512 if (mac_ismsgid(argrest)) message_reference = argrest;
2513 break;
2514
2515
2516 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2517 option, so it looks as if historically the -oex options are also callable
2518 without the leading -o. So we have to accept them. Before the switch,
2519 anything starting -oe has been converted to -e. Exim does not support all
2520 of the sendmail error options. */
2521
2522 case 'e':
2523 if (Ustrcmp(argrest, "e") == 0)
2524 {
2525 arg_error_handling = ERRORS_SENDER;
2526 errors_sender_rc = EXIT_SUCCESS;
2527 }
2528 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2529 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2530 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2531 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2532 else badarg = TRUE;
2533 break;
2534
2535
2536 /* -F: Set sender's full name, used instead of the gecos entry from
2537 the password file. Since users can usually alter their gecos entries,
2538 there's no security involved in using this instead. The data can follow
2539 the -F or be in the next argument. */
2540
2541 case 'F':
2542 if (*argrest == 0)
2543 {
2544 if(++i < argc) argrest = argv[i]; else
2545 { badarg = TRUE; break; }
2546 }
2547 originator_name = argrest;
2548 sender_name_forced = TRUE;
2549 break;
2550
2551
2552 /* -f: Set sender's address - this value is only actually used if Exim is
2553 run by a trusted user, or if untrusted_set_sender is set and matches the
2554 address, except that the null address can always be set by any user. The
2555 test for this happens later, when the value given here is ignored when not
2556 permitted. For an untrusted user, the actual sender is still put in Sender:
2557 if it doesn't match the From: header (unless no_local_from_check is set).
2558 The data can follow the -f or be in the next argument. The -r switch is an
2559 obsolete form of -f but since there appear to be programs out there that
2560 use anything that sendmail has ever supported, better accept it - the
2561 synonymizing is done before the switch above.
2562
2563 At this stage, we must allow domain literal addresses, because we don't
2564 know what the setting of allow_domain_literals is yet. Ditto for trailing
2565 dots and strip_trailing_dot. */
2566
2567 case 'f':
2568 {
2569 int dummy_start, dummy_end;
2570 uschar *errmess;
2571 if (*argrest == 0)
2572 {
2573 if (i+1 < argc) argrest = argv[++i]; else
2574 { badarg = TRUE; break; }
2575 }
2576 if (*argrest == 0)
2577 sender_address = string_sprintf(""); /* Ensure writeable memory */
2578 else
2579 {
2580 uschar *temp = argrest + Ustrlen(argrest) - 1;
2581 while (temp >= argrest && isspace(*temp)) temp--;
2582 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2583 allow_domain_literals = TRUE;
2584 strip_trailing_dot = TRUE;
2585 #ifdef SUPPORT_I18N
2586 allow_utf8_domains = TRUE;
2587 #endif
2588 sender_address = parse_extract_address(argrest, &errmess,
2589 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2590 #ifdef SUPPORT_I18N
2591 message_smtputf8 = string_is_utf8(sender_address);
2592 allow_utf8_domains = FALSE;
2593 #endif
2594 allow_domain_literals = FALSE;
2595 strip_trailing_dot = FALSE;
2596 if (sender_address == NULL)
2597 {
2598 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2599 return EXIT_FAILURE;
2600 }
2601 }
2602 sender_address_forced = TRUE;
2603 }
2604 break;
2605
2606 /* -G: sendmail invocation to specify that it's a gateway submission and
2607 sendmail may complain about problems instead of fixing them.
2608 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2609 not at this time complain about problems. */
2610
2611 case 'G':
2612 flag_G = TRUE;
2613 break;
2614
2615 /* -h: Set the hop count for an incoming message. Exim does not currently
2616 support this; it always computes it by counting the Received: headers.
2617 To put it in will require a change to the spool header file format. */
2618
2619 case 'h':
2620 if (*argrest == 0)
2621 {
2622 if(++i < argc) argrest = argv[i]; else
2623 { badarg = TRUE; break; }
2624 }
2625 if (!isdigit(*argrest)) badarg = TRUE;
2626 break;
2627
2628
2629 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2630 not to be documented for sendmail but mailx (at least) uses it) */
2631
2632 case 'i':
2633 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2634 break;
2635
2636
2637 /* -L: set the identifier used for syslog; equivalent to setting
2638 syslog_processname in the config file, but needs to be an admin option. */
2639
2640 case 'L':
2641 if (*argrest == '\0')
2642 {
2643 if(++i < argc) argrest = argv[i]; else
2644 { badarg = TRUE; break; }
2645 }
2646 sz = Ustrlen(argrest);
2647 if (sz > 32)
2648 {
2649 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2650 return EXIT_FAILURE;
2651 }
2652 if (sz < 1)
2653 {
2654 fprintf(stderr, "exim: the -L syslog name is too short\n");
2655 return EXIT_FAILURE;
2656 }
2657 cmdline_syslog_name = argrest;
2658 break;
2659
2660 case 'M':
2661 receiving_message = FALSE;
2662
2663 /* -MC: continue delivery of another message via an existing open
2664 file descriptor. This option is used for an internal call by the
2665 smtp transport when there is a pending message waiting to go to an
2666 address to which it has got a connection. Five subsequent arguments are
2667 required: transport name, host name, IP address, sequence number, and
2668 message_id. Transports may decline to create new processes if the sequence
2669 number gets too big. The channel is stdin. This (-MC) must be the last
2670 argument. There's a subsequent check that the real-uid is privileged.
2671
2672 If we are running in the test harness. delay for a bit, to let the process
2673 that set this one up complete. This makes for repeatability of the logging,
2674 etc. output. */
2675
2676 if (Ustrcmp(argrest, "C") == 0)
2677 {
2678 union sockaddr_46 interface_sock;
2679 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2680
2681 if (argc != i + 6)
2682 {
2683 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2684 return EXIT_FAILURE;
2685 }
2686
2687 if (msg_action_arg >= 0)
2688 {
2689 fprintf(stderr, "exim: incompatible arguments\n");
2690 return EXIT_FAILURE;
2691 }
2692
2693 continue_transport = argv[++i];
2694 continue_hostname = argv[++i];
2695 continue_host_address = argv[++i];
2696 continue_sequence = Uatoi(argv[++i]);
2697 msg_action = MSG_DELIVER;
2698 msg_action_arg = ++i;
2699 forced_delivery = TRUE;
2700 queue_run_pid = passed_qr_pid;
2701 queue_run_pipe = passed_qr_pipe;
2702
2703 if (!mac_ismsgid(argv[i]))
2704 {
2705 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2706 argv[i]);
2707 return EXIT_FAILURE;
2708 }
2709
2710 /* Set up $sending_ip_address and $sending_port */
2711
2712 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2713 &size) == 0)
2714 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2715 &sending_port);
2716 else
2717 {
2718 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2719 strerror(errno));
2720 return EXIT_FAILURE;
2721 }
2722
2723 if (running_in_test_harness) millisleep(500);
2724 break;
2725 }
2726
2727 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2728 {
2729 switch(argrest[1])
2730 {
2731 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2732 precedes -MC (see above). The flag indicates that the host to which
2733 Exim is connected has accepted an AUTH sequence. */
2734
2735 case 'A': smtp_authenticated = TRUE; break;
2736
2737 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2738 that exim is connected to supports the esmtp extension DSN */
2739
2740 case 'D': smtp_peer_options |= PEER_OFFERED_DSN; break;
2741
2742 /* -MCG: set the queue name, to a non-default value */
2743
2744 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2745 else badarg = TRUE;
2746 break;
2747
2748 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2749
2750 case 'K': smtp_peer_options |= PEER_OFFERED_CHUNKING; break;
2751
2752 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2753 it preceded -MC (see above) */
2754
2755 case 'P': smtp_peer_options |= PEER_OFFERED_PIPE; break;
2756
2757 /* -MCQ: pass on the pid of the queue-running process that started
2758 this chain of deliveries and the fd of its synchronizing pipe; this
2759 is useful only when it precedes -MC (see above) */
2760
2761 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2762 else badarg = TRUE;
2763 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2764 else badarg = TRUE;
2765 break;
2766
2767 /* -MCS: set the smtp_use_size flag; this is useful only when it
2768 precedes -MC (see above) */
2769
2770 case 'S': smtp_peer_options |= PEER_OFFERED_SIZE; break;
2771
2772 #ifdef SUPPORT_TLS
2773 /* -MCT: set the tls_offered flag; this is useful only when it
2774 precedes -MC (see above). The flag indicates that the host to which
2775 Exim is connected has offered TLS support. */
2776
2777 case 'T': smtp_peer_options |= PEER_OFFERED_TLS; break;
2778 #endif
2779
2780 default: badarg = TRUE; break;
2781 }
2782 break;
2783 }
2784
2785 /* -M[x]: various operations on the following list of message ids:
2786 -M deliver the messages, ignoring next retry times and thawing
2787 -Mc deliver the messages, checking next retry times, no thawing
2788 -Mf freeze the messages
2789 -Mg give up on the messages
2790 -Mt thaw the messages
2791 -Mrm remove the messages
2792 In the above cases, this must be the last option. There are also the
2793 following options which are followed by a single message id, and which
2794 act on that message. Some of them use the "recipient" addresses as well.
2795 -Mar add recipient(s)
2796 -Mmad mark all recipients delivered
2797 -Mmd mark recipients(s) delivered
2798 -Mes edit sender
2799 -Mset load a message for use with -be
2800 -Mvb show body
2801 -Mvc show copy (of whole message, in RFC 2822 format)
2802 -Mvh show header
2803 -Mvl show log
2804 */
2805
2806 else if (*argrest == 0)
2807 {
2808 msg_action = MSG_DELIVER;
2809 forced_delivery = deliver_force_thaw = TRUE;
2810 }
2811 else if (Ustrcmp(argrest, "ar") == 0)
2812 {
2813 msg_action = MSG_ADD_RECIPIENT;
2814 one_msg_action = TRUE;
2815 }
2816 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2817 else if (Ustrcmp(argrest, "es") == 0)
2818 {
2819 msg_action = MSG_EDIT_SENDER;
2820 one_msg_action = TRUE;
2821 }
2822 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2823 else if (Ustrcmp(argrest, "g") == 0)
2824 {
2825 msg_action = MSG_DELIVER;
2826 deliver_give_up = TRUE;
2827 }
2828 else if (Ustrcmp(argrest, "mad") == 0)
2829 {
2830 msg_action = MSG_MARK_ALL_DELIVERED;
2831 }
2832 else if (Ustrcmp(argrest, "md") == 0)
2833 {
2834 msg_action = MSG_MARK_DELIVERED;
2835 one_msg_action = TRUE;
2836 }
2837 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2838 else if (Ustrcmp(argrest, "set") == 0)
2839 {
2840 msg_action = MSG_LOAD;
2841 one_msg_action = TRUE;
2842 }
2843 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2844 else if (Ustrcmp(argrest, "vb") == 0)
2845 {
2846 msg_action = MSG_SHOW_BODY;
2847 one_msg_action = TRUE;
2848 }
2849 else if (Ustrcmp(argrest, "vc") == 0)
2850 {
2851 msg_action = MSG_SHOW_COPY;
2852 one_msg_action = TRUE;
2853 }
2854 else if (Ustrcmp(argrest, "vh") == 0)
2855 {
2856 msg_action = MSG_SHOW_HEADER;
2857 one_msg_action = TRUE;
2858 }
2859 else if (Ustrcmp(argrest, "vl") == 0)
2860 {
2861 msg_action = MSG_SHOW_LOG;
2862 one_msg_action = TRUE;
2863 }
2864 else { badarg = TRUE; break; }
2865
2866 /* All the -Mxx options require at least one message id. */
2867
2868 msg_action_arg = i + 1;
2869 if (msg_action_arg >= argc)
2870 {
2871 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2872 return EXIT_FAILURE;
2873 }
2874
2875 /* Some require only message ids to follow */
2876
2877 if (!one_msg_action)
2878 {
2879 int j;
2880 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2881 {
2882 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2883 argv[j], arg);
2884 return EXIT_FAILURE;
2885 }
2886 goto END_ARG; /* Remaining args are ids */
2887 }
2888
2889 /* Others require only one message id, possibly followed by addresses,
2890 which will be handled as normal arguments. */
2891
2892 else
2893 {
2894 if (!mac_ismsgid(argv[msg_action_arg]))
2895 {
2896 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2897 argv[msg_action_arg], arg);
2898 return EXIT_FAILURE;
2899 }
2900 i++;
2901 }
2902 break;
2903
2904
2905 /* Some programs seem to call the -om option without the leading o;
2906 for sendmail it askes for "me too". Exim always does this. */
2907
2908 case 'm':
2909 if (*argrest != 0) badarg = TRUE;
2910 break;
2911
2912
2913 /* -N: don't do delivery - a debugging option that stops transports doing
2914 their thing. It implies debugging at the D_v level. */
2915
2916 case 'N':
2917 if (*argrest == 0)
2918 {
2919 dont_deliver = TRUE;
2920 debug_selector |= D_v;
2921 debug_file = stderr;
2922 }
2923 else badarg = TRUE;
2924 break;
2925
2926
2927 /* -n: This means "don't alias" in sendmail, apparently.
2928 For normal invocations, it has no effect.
2929 It may affect some other options. */
2930
2931 case 'n':
2932 flag_n = TRUE;
2933 break;
2934
2935 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2936 option to the specified value. This form uses long names. We need to handle
2937 -O option=value and -Ooption=value. */
2938
2939 case 'O':
2940 if (*argrest == 0)
2941 {
2942 if (++i >= argc)
2943 {
2944 fprintf(stderr, "exim: string expected after -O\n");
2945 exit(EXIT_FAILURE);
2946 }
2947 }
2948 break;
2949
2950 case 'o':
2951
2952 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2953 file" option). */
2954
2955 if (*argrest == 'A')
2956 {
2957 alias_arg = argrest + 1;
2958 if (alias_arg[0] == 0)
2959 {
2960 if (i+1 < argc) alias_arg = argv[++i]; else
2961 {
2962 fprintf(stderr, "exim: string expected after -oA\n");
2963 exit(EXIT_FAILURE);
2964 }
2965 }
2966 }
2967
2968 /* -oB: Set a connection message max value for remote deliveries */
2969
2970 else if (*argrest == 'B')
2971 {
2972 uschar *p = argrest + 1;
2973 if (p[0] == 0)
2974 {
2975 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2976 {
2977 connection_max_messages = 1;
2978 p = NULL;
2979 }
2980 }
2981
2982 if (p != NULL)
2983 {
2984 if (!isdigit(*p))
2985 {
2986 fprintf(stderr, "exim: number expected after -oB\n");
2987 exit(EXIT_FAILURE);
2988 }
2989 connection_max_messages = Uatoi(p);
2990 }
2991 }
2992
2993 /* -odb: background delivery */
2994
2995 else if (Ustrcmp(argrest, "db") == 0)
2996 {
2997 synchronous_delivery = FALSE;
2998 arg_queue_only = FALSE;
2999 queue_only_set = TRUE;
3000 }
3001
3002 /* -odf: foreground delivery (smail-compatible option); same effect as
3003 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3004 */
3005
3006 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
3007 {
3008 synchronous_delivery = TRUE;
3009 arg_queue_only = FALSE;
3010 queue_only_set = TRUE;
3011 }
3012
3013 /* -odq: queue only */
3014
3015 else if (Ustrcmp(argrest, "dq") == 0)
3016 {
3017 synchronous_delivery = FALSE;
3018 arg_queue_only = TRUE;
3019 queue_only_set = TRUE;
3020 }
3021
3022 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3023 but no remote delivery */
3024
3025 else if (Ustrcmp(argrest, "dqs") == 0)
3026 {
3027 queue_smtp = TRUE;
3028 arg_queue_only = FALSE;
3029 queue_only_set = TRUE;
3030 }
3031
3032 /* -oex: Sendmail error flags. As these are also accepted without the
3033 leading -o prefix, for compatibility with vacation and other callers,
3034 they are handled with -e above. */
3035
3036 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3037 -oitrue: Another sendmail syntax for the same */
3038
3039 else if (Ustrcmp(argrest, "i") == 0 ||
3040 Ustrcmp(argrest, "itrue") == 0)
3041 dot_ends = FALSE;
3042
3043 /* -oM*: Set various characteristics for an incoming message; actually
3044 acted on for trusted callers only. */
3045
3046 else if (*argrest == 'M')
3047 {
3048 if (i+1 >= argc)
3049 {
3050 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3051 exit(EXIT_FAILURE);
3052 }
3053
3054 /* -oMa: Set sender host address */
3055
3056 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3057
3058 /* -oMaa: Set authenticator name */
3059
3060 else if (Ustrcmp(argrest, "Maa") == 0)
3061 sender_host_authenticated = argv[++i];
3062
3063 /* -oMas: setting authenticated sender */
3064
3065 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3066
3067 /* -oMai: setting authenticated id */
3068
3069 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3070
3071 /* -oMi: Set incoming interface address */
3072
3073 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3074
3075 /* -oMm: Message reference */
3076
3077 else if (Ustrcmp(argrest, "Mm") == 0)
3078 {
3079 if (!mac_ismsgid(argv[i+1]))
3080 {
3081 fprintf(stderr,"-oMm must be a valid message ID\n");
3082 exit(EXIT_FAILURE);
3083 }
3084 if (!trusted_config)
3085 {
3086 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3087 exit(EXIT_FAILURE);
3088 }
3089 message_reference = argv[++i];
3090 }
3091
3092 /* -oMr: Received protocol */
3093
3094 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3095
3096 /* -oMs: Set sender host name */
3097
3098 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3099
3100 /* -oMt: Set sender ident */
3101
3102 else if (Ustrcmp(argrest, "Mt") == 0)
3103 {
3104 sender_ident_set = TRUE;
3105 sender_ident = argv[++i];
3106 }
3107
3108 /* Else a bad argument */
3109
3110 else
3111 {
3112 badarg = TRUE;
3113 break;
3114 }
3115 }
3116
3117 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3118 seem to call this as -m (undocumented), so that is also accepted (see
3119 above). */
3120
3121 else if (Ustrcmp(argrest, "m") == 0) {}
3122
3123 /* -oo: An ancient flag for old-style addresses which still seems to
3124 crop up in some calls (see in SCO). */
3125
3126 else if (Ustrcmp(argrest, "o") == 0) {}
3127
3128 /* -oP <name>: set pid file path for daemon */
3129
3130 else if (Ustrcmp(argrest, "P") == 0)
3131 override_pid_file_path = argv[++i];
3132
3133 /* -or <n>: set timeout for non-SMTP acceptance
3134 -os <n>: set timeout for SMTP acceptance */
3135
3136 else if (*argrest == 'r' || *argrest == 's')
3137 {
3138 int *tp = (*argrest == 'r')?
3139 &arg_receive_timeout : &arg_smtp_receive_timeout;
3140 if (argrest[1] == 0)
3141 {
3142 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3143 }
3144 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3145 if (*tp < 0)
3146 {
3147 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3148 exit(EXIT_FAILURE);
3149 }
3150 }
3151
3152 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3153
3154 else if (Ustrcmp(argrest, "X") == 0)
3155 override_local_interfaces = argv[++i];
3156
3157 /* Unknown -o argument */
3158
3159 else badarg = TRUE;
3160 break;
3161
3162
3163 /* -ps: force Perl startup; -pd force delayed Perl startup */
3164
3165 case 'p':
3166 #ifdef EXIM_PERL
3167 if (*argrest == 's' && argrest[1] == 0)
3168 {
3169 perl_start_option = 1;
3170 break;
3171 }
3172 if (*argrest == 'd' && argrest[1] == 0)
3173 {
3174 perl_start_option = -1;
3175 break;
3176 }
3177 #endif
3178
3179 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3180 which sets the host protocol and host name */
3181
3182 if (*argrest == 0)
3183 {
3184 if (i+1 < argc) argrest = argv[++i]; else
3185 { badarg = TRUE; break; }
3186 }
3187
3188 if (*argrest != 0)
3189 {
3190 uschar *hn = Ustrchr(argrest, ':');
3191 if (hn == NULL)
3192 {
3193 received_protocol = argrest;
3194 }
3195 else
3196 {
3197 received_protocol = string_copyn(argrest, hn - argrest);
3198 sender_host_name = hn + 1;
3199 }
3200 }
3201 break;
3202
3203
3204 case 'q':
3205 receiving_message = FALSE;
3206 if (queue_interval >= 0)
3207 {
3208 fprintf(stderr, "exim: -q specified more than once\n");
3209 exit(EXIT_FAILURE);
3210 }
3211
3212 /* -qq...: Do queue runs in a 2-stage manner */
3213
3214 if (*argrest == 'q')
3215 {
3216 queue_2stage = TRUE;
3217 argrest++;
3218 }
3219
3220 /* -qi...: Do only first (initial) deliveries */
3221
3222 if (*argrest == 'i')
3223 {
3224 queue_run_first_delivery = TRUE;
3225 argrest++;
3226 }
3227
3228 /* -qf...: Run the queue, forcing deliveries
3229 -qff..: Ditto, forcing thawing as well */
3230
3231 if (*argrest == 'f')
3232 {
3233 queue_run_force = TRUE;
3234 if (*++argrest == 'f')
3235 {
3236 deliver_force_thaw = TRUE;
3237 argrest++;
3238 }
3239 }
3240
3241 /* -q[f][f]l...: Run the queue only on local deliveries */
3242
3243 if (*argrest == 'l')
3244 {
3245 queue_run_local = TRUE;
3246 argrest++;
3247 }
3248
3249 /* -q[f][f][l][G<name>]... Work on the named queue */
3250
3251 if (*argrest == 'G')
3252 {
3253 int i;
3254 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3255 queue_name = string_copyn(argrest, i);
3256 argrest += i;
3257 if (*argrest == '/') argrest++;
3258 }
3259
3260 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3261 only, optionally named, optionally starting from a given message id. */
3262
3263 if (*argrest == 0 &&
3264 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3265 {
3266 queue_interval = 0;
3267 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3268 start_queue_run_id = argv[++i];
3269 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3270 stop_queue_run_id = argv[++i];
3271 }
3272
3273 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3274 forced, optionally local only, optionally named. */
3275
3276 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3277 0, FALSE)) <= 0)
3278 {
3279 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3280 exit(EXIT_FAILURE);
3281 }
3282 break;
3283
3284
3285 case 'R': /* Synonymous with -qR... */
3286 receiving_message = FALSE;
3287
3288 /* -Rf: As -R (below) but force all deliveries,
3289 -Rff: Ditto, but also thaw all frozen messages,
3290 -Rr: String is regex
3291 -Rrf: Regex and force
3292 -Rrff: Regex and force and thaw
3293
3294 in all cases provided there are no further characters in this
3295 argument. */
3296
3297 if (*argrest != 0)
3298 {
3299 int i;
3300 for (i = 0; i < nelem(rsopts); i++)
3301 if (Ustrcmp(argrest, rsopts[i]) == 0)
3302 {
3303 if (i != 2) queue_run_force = TRUE;
3304 if (i >= 2) deliver_selectstring_regex = TRUE;
3305 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3306 argrest += Ustrlen(rsopts[i]);
3307 }
3308 }
3309
3310 /* -R: Set string to match in addresses for forced queue run to
3311 pick out particular messages. */
3312
3313 if (*argrest)
3314 deliver_selectstring = argrest;
3315 else if (i+1 < argc)
3316 deliver_selectstring = argv[++i];
3317 else
3318 {
3319 fprintf(stderr, "exim: string expected after -R\n");
3320 exit(EXIT_FAILURE);
3321 }
3322 break;
3323
3324
3325 /* -r: an obsolete synonym for -f (see above) */
3326
3327
3328 /* -S: Like -R but works on sender. */
3329
3330 case 'S': /* Synonymous with -qS... */
3331 receiving_message = FALSE;
3332
3333 /* -Sf: As -S (below) but force all deliveries,
3334 -Sff: Ditto, but also thaw all frozen messages,
3335 -Sr: String is regex
3336 -Srf: Regex and force
3337 -Srff: Regex and force and thaw
3338
3339 in all cases provided there are no further characters in this
3340 argument. */
3341
3342 if (*argrest)
3343 {
3344 int i;
3345 for (i = 0; i < nelem(rsopts); i++)
3346 if (Ustrcmp(argrest, rsopts[i]) == 0)
3347 {
3348 if (i != 2) queue_run_force = TRUE;
3349 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3350 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3351 argrest += Ustrlen(rsopts[i]);
3352 }
3353 }
3354
3355 /* -S: Set string to match in addresses for forced queue run to
3356 pick out particular messages. */
3357
3358 if (*argrest)
3359 deliver_selectstring_sender = argrest;
3360 else if (i+1 < argc)
3361 deliver_selectstring_sender = argv[++i];
3362 else
3363 {
3364 fprintf(stderr, "exim: string expected after -S\n");
3365 exit(EXIT_FAILURE);
3366 }
3367 break;
3368
3369 /* -Tqt is an option that is exclusively for use by the testing suite.
3370 It is not recognized in other circumstances. It allows for the setting up
3371 of explicit "queue times" so that various warning/retry things can be
3372 tested. Otherwise variability of clock ticks etc. cause problems. */
3373
3374 case 'T':
3375 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3376 fudged_queue_times = argv[++i];
3377 else badarg = TRUE;
3378 break;
3379
3380
3381 /* -t: Set flag to extract recipients from body of message. */
3382
3383 case 't':
3384 if (*argrest == 0) extract_recipients = TRUE;
3385
3386 /* -ti: Set flag to extract recipients from body of message, and also
3387 specify that dot does not end the message. */
3388
3389 else if (Ustrcmp(argrest, "i") == 0)
3390 {
3391 extract_recipients = TRUE;
3392 dot_ends = FALSE;
3393 }
3394
3395 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3396
3397 #ifdef SUPPORT_TLS
3398 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3399 #endif
3400
3401 else badarg = TRUE;
3402 break;
3403
3404
3405 /* -U: This means "initial user submission" in sendmail, apparently. The
3406 doc claims that in future sendmail may refuse syntactically invalid
3407 messages instead of fixing them. For the moment, we just ignore it. */
3408
3409 case 'U':
3410 break;
3411
3412
3413 /* -v: verify things - this is a very low-level debugging */
3414
3415 case 'v':
3416 if (*argrest == 0)
3417 {
3418 debug_selector |= D_v;
3419 debug_file = stderr;
3420 }
3421 else badarg = TRUE;
3422 break;
3423
3424
3425 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3426
3427 The -x flag tells the sendmail command that mail from a local
3428 mail program has National Language Support (NLS) extended characters
3429 in the body of the mail item. The sendmail command can send mail with
3430 extended NLS characters across networks that normally corrupts these
3431 8-bit characters.
3432
3433 As Exim is 8-bit clean, it just ignores this flag. */
3434
3435 case 'x':
3436 if (*argrest != 0) badarg = TRUE;
3437 break;
3438
3439 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3440 logs to that file. We swallow the parameter and otherwise ignore it. */
3441
3442 case 'X':
3443 if (*argrest == '\0')
3444 if (++i >= argc)
3445 {
3446 fprintf(stderr, "exim: string expected after -X\n");
3447 exit(EXIT_FAILURE);
3448 }
3449 break;
3450
3451 case 'z':
3452 if (*argrest == '\0')
3453 if (++i < argc) log_oneline = argv[i]; else
3454 {
3455 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3456 exit(EXIT_FAILURE);
3457 }
3458 break;
3459
3460 /* All other initial characters are errors */
3461
3462 default:
3463 badarg = TRUE;
3464 break;
3465 } /* End of high-level switch statement */
3466
3467 /* Failed to recognize the option, or syntax error */
3468
3469 if (badarg)
3470 {
3471 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3472 "option %s\n", arg);
3473 exit(EXIT_FAILURE);
3474 }
3475 }
3476
3477
3478 /* If -R or -S have been specified without -q, assume a single queue run. */
3479
3480 if ( (deliver_selectstring || deliver_selectstring_sender)
3481 && queue_interval < 0)
3482 queue_interval = 0;
3483
3484
3485 END_ARG:
3486 /* If usage_wanted is set we call the usage function - which never returns */
3487 if (usage_wanted) exim_usage(called_as);
3488
3489 /* Arguments have been processed. Check for incompatibilities. */
3490 if ((
3491 (smtp_input || extract_recipients || recipients_arg < argc) &&
3492 (daemon_listen || queue_interval >= 0 || bi_option ||
3493 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3494 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3495 ) ||
3496 (
3497 msg_action_arg > 0 &&
3498 (daemon_listen || queue_interval > 0 || list_options ||
3499 (checking && msg_action != MSG_LOAD) ||
3500 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3501 ) ||
3502 (
3503 (daemon_listen || queue_interval > 0) &&
3504 (sender_address != NULL || list_options || list_queue || checking ||
3505 bi_option)
3506 ) ||
3507 (
3508 daemon_listen && queue_interval == 0
3509 ) ||
3510 (
3511 inetd_wait_mode && queue_interval >= 0
3512 ) ||
3513 (
3514 list_options &&
3515 (checking || smtp_input || extract_recipients ||
3516 filter_test != FTEST_NONE || bi_option)
3517 ) ||
3518 (
3519 verify_address_mode &&
3520 (address_test_mode || smtp_input || extract_recipients ||
3521 filter_test != FTEST_NONE || bi_option)
3522 ) ||
3523 (
3524 address_test_mode && (smtp_input || extract_recipients ||
3525 filter_test != FTEST_NONE || bi_option)
3526 ) ||
3527 (
3528 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3529 extract_recipients)
3530 ) ||
3531 (
3532 deliver_selectstring != NULL && queue_interval < 0
3533 ) ||
3534 (
3535 msg_action == MSG_LOAD &&
3536 (!expansion_test || expansion_test_message != NULL)
3537 )
3538 )
3539 {
3540 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3541 exit(EXIT_FAILURE);
3542 }
3543
3544 /* If debugging is set up, set the file and the file descriptor to pass on to
3545 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3546 to run in the foreground. */
3547
3548 if (debug_selector != 0)
3549 {
3550 debug_file = stderr;
3551 debug_fd = fileno(debug_file);
3552 background_daemon = FALSE;
3553 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3554 if (debug_selector != D_v) /* -v only doesn't show this */
3555 {
3556 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3557 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3558 debug_selector);
3559 if (!version_printed)
3560 show_whats_supported(stderr);
3561 }
3562 }
3563
3564 /* When started with root privilege, ensure that the limits on the number of
3565 open files and the number of processes (where that is accessible) are
3566 sufficiently large, or are unset, in case Exim has been called from an
3567 environment where the limits are screwed down. Not all OS have the ability to
3568 change some of these limits. */
3569
3570 if (unprivileged)
3571 {
3572 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3573 }
3574 else
3575 {
3576 struct rlimit rlp;
3577
3578 #ifdef RLIMIT_NOFILE
3579 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3580 {
3581 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3582 strerror(errno));
3583 rlp.rlim_cur = rlp.rlim_max = 0;
3584 }
3585
3586 /* I originally chose 1000 as a nice big number that was unlikely to
3587 be exceeded. It turns out that some older OS have a fixed upper limit of
3588 256. */
3589
3590 if (rlp.rlim_cur < 1000)
3591 {
3592 rlp.rlim_cur = rlp.rlim_max = 1000;
3593 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3594 {
3595 rlp.rlim_cur = rlp.rlim_max = 256;
3596 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3597 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3598 strerror(errno));
3599 }
3600 }
3601 #endif
3602
3603 #ifdef RLIMIT_NPROC
3604 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3605 {
3606 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3607 strerror(errno));
3608 rlp.rlim_cur = rlp.rlim_max = 0;
3609 }
3610
3611 #ifdef RLIM_INFINITY
3612 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3613 {
3614 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3615 #else
3616 if (rlp.rlim_cur < 1000)
3617 {
3618 rlp.rlim_cur = rlp.rlim_max = 1000;
3619 #endif
3620 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3621 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3622 strerror(errno));
3623 }
3624 #endif
3625 }
3626
3627 /* Exim is normally entered as root (but some special configurations are
3628 possible that don't do this). However, it always spins off sub-processes that
3629 set their uid and gid as required for local delivery. We don't want to pass on
3630 any extra groups that root may belong to, so we want to get rid of them all at
3631 this point.
3632
3633 We need to obey setgroups() at this stage, before possibly giving up root
3634 privilege for a changed configuration file, but later on we might need to
3635 check on the additional groups for the admin user privilege - can't do that
3636 till after reading the config, which might specify the exim gid. Therefore,
3637 save the group list here first. */
3638
3639 group_count = getgroups(NGROUPS_MAX, group_list);
3640 if (group_count < 0)
3641 {
3642 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3643 exit(EXIT_FAILURE);
3644 }
3645
3646 /* There is a fundamental difference in some BSD systems in the matter of
3647 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3648 known not to be different. On the "different" systems there is a single group
3649 list, and the first entry in it is the current group. On all other versions of
3650 Unix there is a supplementary group list, which is in *addition* to the current
3651 group. Consequently, to get rid of all extraneous groups on a "standard" system
3652 you pass over 0 groups to setgroups(), while on a "different" system you pass
3653 over a single group - the current group, which is always the first group in the
3654 list. Calling setgroups() with zero groups on a "different" system results in
3655 an error return. The following code should cope with both types of system.
3656
3657 However, if this process isn't running as root, setgroups() can't be used
3658 since you have to be root to run it, even if throwing away groups. Not being
3659 root here happens only in some unusual configurations. We just ignore the
3660 error. */
3661
3662 if (setgroups(0, NULL) != 0)
3663 {
3664 if (setgroups(1, group_list) != 0 && !unprivileged)
3665 {
3666 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3667 exit(EXIT_FAILURE);
3668 }
3669 }
3670
3671 /* If the configuration file name has been altered by an argument on the
3672 command line (either a new file name or a macro definition) and the caller is
3673 not root, or if this is a filter testing run, remove any setuid privilege the
3674 program has and run as the underlying user.
3675
3676 The exim user is locked out of this, which severely restricts the use of -C
3677 for some purposes.
3678
3679 Otherwise, set the real ids to the effective values (should be root unless run
3680 from inetd, which it can either be root or the exim uid, if one is configured).
3681
3682 There is a private mechanism for bypassing some of this, in order to make it
3683 possible to test lots of configurations automatically, without having either to
3684 recompile each time, or to patch in an actual configuration file name and other
3685 values (such as the path name). If running in the test harness, pretend that
3686 configuration file changes and macro definitions haven't happened. */
3687
3688 if (( /* EITHER */
3689 (!trusted_config || /* Config changed, or */
3690 !macros_trusted()) && /* impermissible macros and */
3691 real_uid != root_uid && /* Not root, and */
3692 !running_in_test_harness /* Not fudged */
3693 ) || /* OR */
3694 expansion_test /* expansion testing */
3695 || /* OR */
3696 filter_test != FTEST_NONE) /* Filter testing */
3697 {
3698 setgroups(group_count, group_list);
3699 exim_setugid(real_uid, real_gid, FALSE,
3700 US"-C, -D, -be or -bf forces real uid");
3701 removed_privilege = TRUE;
3702
3703 /* In the normal case when Exim is called like this, stderr is available
3704 and should be used for any logging information because attempts to write
3705 to the log will usually fail. To arrange this, we unset really_exim. However,
3706 if no stderr is available there is no point - we might as well have a go
3707 at the log (if it fails, syslog will be written).
3708
3709 Note that if the invoker is Exim, the logs remain available. Messing with
3710 this causes unlogged successful deliveries. */
3711
3712 if ((log_stderr != NULL) && (real_uid != exim_uid))
3713 really_exim = FALSE;
3714 }
3715
3716 /* Privilege is to be retained for the moment. It may be dropped later,
3717 depending on the job that this Exim process has been asked to do. For now, set
3718 the real uid to the effective so that subsequent re-execs of Exim are done by a
3719 privileged user. */
3720
3721 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3722
3723 /* If testing a filter, open the file(s) now, before wasting time doing other
3724 setups and reading the message. */
3725
3726 if ((filter_test & FTEST_SYSTEM) != 0)
3727 {
3728 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3729 if (filter_sfd < 0)
3730 {
3731 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3732 strerror(errno));
3733 return EXIT_FAILURE;
3734 }
3735 }
3736
3737 if ((filter_test & FTEST_USER) != 0)
3738 {
3739 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3740 if (filter_ufd < 0)
3741 {
3742 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3743 strerror(errno));
3744 return EXIT_FAILURE;
3745 }
3746 }
3747
3748 /* Initialise lookup_list
3749 If debugging, already called above via version reporting.
3750 In either case, we initialise the list of available lookups while running
3751 as root. All dynamically modules are loaded from a directory which is
3752 hard-coded into the binary and is code which, if not a module, would be
3753 part of Exim already. Ability to modify the content of the directory
3754 is equivalent to the ability to modify a setuid binary!
3755
3756 This needs to happen before we read the main configuration. */
3757 init_lookup_list();
3758
3759 #ifdef SUPPORT_I18N
3760 if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3761 #endif
3762
3763 /* Read the main runtime configuration data; this gives up if there
3764 is a failure. It leaves the configuration file open so that the subsequent
3765 configuration data for delivery can be read if needed.
3766
3767 NOTE: immediatly after opening the configuration file we change the working
3768 directory to "/"! Later we change to $spool_directory. We do it there, because
3769 during readconf_main() some expansion takes place already. */
3770
3771 /* Store the initial cwd before we change directories */
3772 if ((initial_cwd = os_getcwd(NULL, 0)) == NULL)
3773 {
3774 perror("exim: can't get the current working directory");
3775 exit(EXIT_FAILURE);
3776 }
3777
3778 /* checking:
3779 -be[m] expansion test -
3780 -b[fF] filter test new
3781 -bh[c] host test -
3782 -bmalware malware_test_file new
3783 -brt retry test new
3784 -brw rewrite test new
3785 -bt address test -
3786 -bv[s] address verify -
3787 list_options:
3788 -bP <option> (except -bP config, which sets list_config)
3789
3790 If any of these options is set, we suppress warnings about configuration
3791 issues (currently about tls_advertise_hosts and keep_environment not being
3792 defined) */
3793
3794 readconf_main(checking || list_options);
3795
3796 /* Now in directory "/" */
3797
3798 if (cleanup_environment() == FALSE)
3799 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3800
3801
3802 /* If an action on specific messages is requested, or if a daemon or queue
3803 runner is being started, we need to know if Exim was called by an admin user.
3804 This is the case if the real user is root or exim, or if the real group is
3805 exim, or if one of the supplementary groups is exim or a group listed in
3806 admin_groups. We don't fail all message actions immediately if not admin_user,
3807 since some actions can be performed by non-admin users. Instead, set admin_user
3808 for later interrogation. */
3809
3810 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3811 admin_user = TRUE;
3812 else
3813 {
3814 int i, j;
3815 for (i = 0; i < group_count; i++)
3816 {
3817 if (group_list[i] == exim_gid) admin_user = TRUE;
3818 else if (admin_groups != NULL)
3819 {
3820 for (j = 1; j <= (int)(admin_groups[0]); j++)
3821 if (admin_groups[j] == group_list[i])
3822 { admin_user = TRUE; break; }
3823 }
3824 if (admin_user) break;
3825 }
3826 }
3827
3828 /* Another group of privileged users are the trusted users. These are root,
3829 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3830 are permitted to specify sender_addresses with -f on the command line, and
3831 other message parameters as well. */
3832
3833 if (real_uid == root_uid || real_uid == exim_uid)
3834 trusted_caller = TRUE;
3835 else
3836 {
3837 int i, j;
3838
3839 if (trusted_users != NULL)
3840 {
3841 for (i = 1; i <= (int)(trusted_users[0]); i++)
3842 if (trusted_users[i] == real_uid)
3843 { trusted_caller = TRUE; break; }
3844 }
3845
3846 if (!trusted_caller && trusted_groups != NULL)
3847 {
3848 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3849 {
3850 if (trusted_groups[i] == real_gid)
3851 trusted_caller = TRUE;
3852 else for (j = 0; j < group_count; j++)
3853 {
3854 if (trusted_groups[i] == group_list[j])
3855 { trusted_caller = TRUE; break; }
3856 }
3857 if (trusted_caller) break;
3858 }
3859 }
3860 }
3861
3862 /* Handle the decoding of logging options. */
3863
3864 decode_bits(log_selector, log_selector_size, log_notall,
3865 log_selector_string, log_options, log_options_count, US"log", 0);
3866
3867 DEBUG(D_any)
3868 {
3869 int i;
3870 debug_printf("configuration file is %s\n", config_main_filename);
3871 debug_printf("log selectors =");
3872 for (i = 0; i < log_selector_size; i++)
3873 debug_printf(" %08x", log_selector[i]);
3874 debug_printf("\n");
3875 }
3876
3877 /* If domain literals are not allowed, check the sender address that was
3878 supplied with -f. Ditto for a stripped trailing dot. */
3879
3880 if (sender_address != NULL)
3881 {
3882 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3883 {
3884 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3885 "allowed\n", sender_address);
3886 return EXIT_FAILURE;
3887 }
3888 if (f_end_dot && !strip_trailing_dot)
3889 {
3890 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3891 "(trailing dot not allowed)\n", sender_address);
3892 return EXIT_FAILURE;
3893 }
3894 }
3895
3896 /* See if an admin user overrode our logging. */
3897
3898 if (cmdline_syslog_name != NULL)
3899 {
3900 if (admin_user)
3901 {
3902 syslog_processname = cmdline_syslog_name;
3903 log_file_path = string_copy(CUS"syslog");
3904 }
3905 else
3906 {
3907 /* not a panic, non-privileged users should not be able to spam paniclog */
3908 fprintf(stderr,
3909 "exim: you lack sufficient privilege to specify syslog process name\n");
3910 return EXIT_FAILURE;
3911 }
3912 }
3913
3914 /* Paranoia check of maximum lengths of certain strings. There is a check
3915 on the length of the log file path in log.c, which will come into effect
3916 if there are any calls to write the log earlier than this. However, if we
3917 get this far but the string is very long, it is better to stop now than to
3918 carry on and (e.g.) receive a message and then have to collapse. The call to
3919 log_write() from here will cause the ultimate panic collapse if the complete
3920 file name exceeds the buffer length. */
3921
3922 if (Ustrlen(log_file_path) > 200)
3923 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3924 "log_file_path is longer than 200 chars: aborting");
3925
3926 if (Ustrlen(pid_file_path) > 200)
3927 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3928 "pid_file_path is longer than 200 chars: aborting");
3929
3930 if (Ustrlen(spool_directory) > 200)
3931 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3932 "spool_directory is longer than 200 chars: aborting");
3933
3934 /* Length check on the process name given to syslog for its TAG field,
3935 which is only permitted to be 32 characters or less. See RFC 3164. */
3936
3937 if (Ustrlen(syslog_processname) > 32)
3938 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3939 "syslog_processname is longer than 32 chars: aborting");
3940
3941 if (log_oneline)
3942 if (admin_user)
3943 {
3944 log_write(0, LOG_MAIN, "%s", log_oneline);
3945 return EXIT_SUCCESS;
3946 }
3947 else
3948 return EXIT_FAILURE;
3949
3950 /* In some operating systems, the environment variable TMPDIR controls where
3951 temporary files are created; Exim doesn't use these (apart from when delivering
3952 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3953 If TMPDIR is found in the environment, reset it to the value defined in the
3954 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3955 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3956 EXIM_TMPDIR by the build scripts.
3957 */
3958
3959 #ifdef EXIM_TMPDIR
3960 {
3961 uschar **p;
3962 if (environ) for (p = USS environ; *p; p++)
3963 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3964 {
3965 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3966 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3967 *p = newp;
3968 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3969 }
3970 }
3971 #endif
3972
3973 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3974 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3975 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3976 called by a user who has set the TZ variable. This then affects the timestamps
3977 in log files and in Received: headers, and any created Date: header lines. The
3978 required timezone is settable in the configuration file, so nothing can be done
3979 about this earlier - but hopefully nothing will normally be logged earlier than
3980 this. We have to make a new environment if TZ is wrong, but don't bother if
3981 timestamps_utc is set, because then all times are in UTC anyway. */
3982
3983 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3984 timestamps_utc = TRUE;
3985 else
3986 {
3987 uschar *envtz = US getenv("TZ");
3988 if (envtz
3989 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3990 : timezone_string != NULL
3991 )
3992 {
3993 uschar **p = USS environ;
3994 uschar **new;
3995 uschar **newp;
3996 int count = 0;
3997 if (environ) while (*p++) count++;
3998 if (!envtz) count++;
3999 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4000 if (environ) for (p = USS environ; *p; p++)
4001 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4002 if (timezone_string)
4003 {
4004 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4005 sprintf(CS *newp++, "TZ=%s", timezone_string);
4006 }
4007 *newp = NULL;
4008 environ = CSS new;
4009 tzset();
4010 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4011 tod_stamp(tod_log));
4012 }
4013 }
4014
4015 /* Handle the case when we have removed the setuid privilege because of -C or
4016 -D. This means that the caller of Exim was not root.
4017
4018 There is a problem if we were running as the Exim user. The sysadmin may
4019 expect this case to retain privilege because "the binary was called by the
4020 Exim user", but it hasn't, because either the -D option set macros, or the
4021 -C option set a non-trusted configuration file. There are two possibilities:
4022
4023 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4024 to do message deliveries. Thus, the fact that it is running as a
4025 non-privileged user is plausible, and might be wanted in some special
4026 configurations. However, really_exim will have been set false when
4027 privilege was dropped, to stop Exim trying to write to its normal log
4028 files. Therefore, re-enable normal log processing, assuming the sysadmin
4029 has set up the log directory correctly.
4030
4031 (2) If deliver_drop_privilege is not set, the configuration won't work as
4032 apparently intended, and so we log a panic message. In order to retain
4033 root for -C or -D, the caller must either be root or be invoking a
4034 trusted configuration file (when deliver_drop_privilege is false). */
4035
4036 if ( removed_privilege
4037 && (!trusted_config || opt_D_used)
4038 && real_uid == exim_uid)
4039 if (deliver_drop_privilege)
4040 really_exim = TRUE; /* let logging work normally */
4041 else
4042 log_write(0, LOG_MAIN|LOG_PANIC,
4043 "exim user lost privilege for using %s option",
4044 trusted_config? "-D" : "-C");
4045
4046 /* Start up Perl interpreter if Perl support is configured and there is a
4047 perl_startup option, and the configuration or the command line specifies
4048 initializing starting. Note that the global variables are actually called
4049 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4050
4051 #ifdef EXIM_PERL
4052 if (perl_start_option != 0)
4053 opt_perl_at_start = (perl_start_option > 0);
4054 if (opt_perl_at_start && opt_perl_startup != NULL)
4055 {
4056 uschar *errstr;
4057 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4058 errstr = init_perl(opt_perl_startup);
4059 if (errstr != NULL)
4060 {
4061 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
4062 return EXIT_FAILURE;
4063 }
4064 opt_perl_started = TRUE;
4065 }
4066 #endif /* EXIM_PERL */
4067
4068 /* Log the arguments of the call if the configuration file said so. This is
4069 a debugging feature for finding out what arguments certain MUAs actually use.
4070 Don't attempt it if logging is disabled, or if listing variables or if
4071 verifying/testing addresses or expansions. */
4072
4073 if (((debug_selector & D_any) != 0 || LOGGING(arguments))
4074 && really_exim && !list_options && !checking)
4075 {
4076 int i;
4077 uschar *p = big_buffer;
4078 Ustrcpy(p, "cwd= (failed)");
4079
4080 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4081
4082 while (*p) p++;
4083 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4084 while (*p) p++;
4085 for (i = 0; i < argc; i++)
4086 {
4087 int len = Ustrlen(argv[i]);
4088 const uschar *printing;
4089 uschar *quote;
4090 if (p + len + 8 >= big_buffer + big_buffer_size)
4091 {
4092 Ustrcpy(p, " ...");
4093 log_write(0, LOG_MAIN, "%s", big_buffer);
4094 Ustrcpy(big_buffer, "...");
4095 p = big_buffer + 3;
4096 }
4097 printing = string_printing(argv[i]);
4098 if (printing[0] == 0) quote = US"\""; else
4099 {
4100 const uschar *pp = printing;
4101 quote = US"";
4102 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4103 }
4104 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4105 (p - big_buffer) - 4), printing, quote);
4106 while (*p) p++;
4107 }
4108
4109 if (LOGGING(arguments))
4110 log_write(0, LOG_MAIN, "%s", big_buffer);
4111 else
4112 debug_printf("%s\n", big_buffer);
4113 }
4114
4115 /* Set the working directory to be the top-level spool directory. We don't rely
4116 on this in the code, which always uses fully qualified names, but it's useful
4117 for core dumps etc. Don't complain if it fails - the spool directory might not
4118 be generally accessible and calls with the -C option (and others) have lost
4119 privilege by now. Before the chdir, we try to ensure that the directory exists.
4120 */
4121
4122 if (Uchdir(spool_directory) != 0)
4123 {
4124 int dummy;
4125 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4126 dummy = /* quieten compiler */ Uchdir(spool_directory);
4127 }
4128
4129 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4130 alias file. Exim doesn't have such a concept, but this call is screwed into
4131 Sun's YP makefiles. Handle this by calling a configured script, as the real
4132 user who called Exim. The -oA option can be used to pass an argument to the
4133 script. */
4134
4135 if (bi_option)
4136 {
4137 (void)fclose(config_file);