c134bf5e6e441bb95c46bc4d8a2c6f8203489c52
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 #ifdef USE_GNUTLS
16 # include <gnutls/gnutls.h>
17 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
18 # define DISABLE_OCSP
19 # endif
20 #endif
21
22 extern void init_lookup_list(void);
23
24
25
26 /*************************************************
27 * Function interface to store functions *
28 *************************************************/
29
30 /* We need some real functions to pass to the PCRE regular expression library
31 for store allocation via Exim's store manager. The normal calls are actually
32 macros that pass over location information to make tracing easier. These
33 functions just interface to the standard macro calls. A good compiler will
34 optimize out the tail recursion and so not make them too expensive. There
35 are two sets of functions; one for use when we want to retain the compiled
36 regular expression for a long time; the other for short-term use. */
37
38 static void *
39 function_store_get(size_t size)
40 {
41 return store_get((int)size);
42 }
43
44 static void
45 function_dummy_free(void *block) { block = block; }
46
47 static void *
48 function_store_malloc(size_t size)
49 {
50 return store_malloc((int)size);
51 }
52
53 static void
54 function_store_free(void *block)
55 {
56 store_free(block);
57 }
58
59
60
61
62 /*************************************************
63 * Enums for cmdline interface *
64 *************************************************/
65
66 enum commandline_info { CMDINFO_NONE=0,
67 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
68
69
70
71
72 /*************************************************
73 * Compile regular expression and panic on fail *
74 *************************************************/
75
76 /* This function is called when failure to compile a regular expression leads
77 to a panic exit. In other cases, pcre_compile() is called directly. In many
78 cases where this function is used, the results of the compilation are to be
79 placed in long-lived store, so we temporarily reset the store management
80 functions that PCRE uses if the use_malloc flag is set.
81
82 Argument:
83 pattern the pattern to compile
84 caseless TRUE if caseless matching is required
85 use_malloc TRUE if compile into malloc store
86
87 Returns: pointer to the compiled pattern
88 */
89
90 const pcre *
91 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
92 {
93 int offset;
94 int options = PCRE_COPT;
95 const pcre *yield;
96 const uschar *error;
97 if (use_malloc)
98 {
99 pcre_malloc = function_store_malloc;
100 pcre_free = function_store_free;
101 }
102 if (caseless) options |= PCRE_CASELESS;
103 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
104 pcre_malloc = function_store_get;
105 pcre_free = function_dummy_free;
106 if (yield == NULL)
107 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
108 "%s at offset %d while compiling %s", error, offset, pattern);
109 return yield;
110 }
111
112
113
114
115 /*************************************************
116 * Execute regular expression and set strings *
117 *************************************************/
118
119 /* This function runs a regular expression match, and sets up the pointers to
120 the matched substrings.
121
122 Arguments:
123 re the compiled expression
124 subject the subject string
125 options additional PCRE options
126 setup if < 0 do full setup
127 if >= 0 setup from setup+1 onwards,
128 excluding the full matched string
129
130 Returns: TRUE or FALSE
131 */
132
133 BOOL
134 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
135 {
136 int ovector[3*(EXPAND_MAXN+1)];
137 uschar * s = string_copy(subject); /* de-constifying */
138 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
139 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
140 BOOL yield = n >= 0;
141 if (n == 0) n = EXPAND_MAXN + 1;
142 if (yield)
143 {
144 int nn;
145 expand_nmax = (setup < 0)? 0 : setup + 1;
146 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
147 {
148 expand_nstring[expand_nmax] = s + ovector[nn];
149 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
150 }
151 expand_nmax--;
152 }
153 return yield;
154 }
155
156
157
158
159 /*************************************************
160 * Set up processing details *
161 *************************************************/
162
163 /* Save a text string for dumping when SIGUSR1 is received.
164 Do checks for overruns.
165
166 Arguments: format and arguments, as for printf()
167 Returns: nothing
168 */
169
170 void
171 set_process_info(const char *format, ...)
172 {
173 int len;
174 va_list ap;
175 sprintf(CS process_info, "%5d ", (int)getpid());
176 len = Ustrlen(process_info);
177 va_start(ap, format);
178 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
179 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
180 len = Ustrlen(process_info);
181 process_info[len+0] = '\n';
182 process_info[len+1] = '\0';
183 process_info_len = len + 1;
184 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
185 va_end(ap);
186 }
187
188
189
190
191 /*************************************************
192 * Handler for SIGUSR1 *
193 *************************************************/
194
195 /* SIGUSR1 causes any exim process to write to the process log details of
196 what it is currently doing. It will only be used if the OS is capable of
197 setting up a handler that causes automatic restarting of any system call
198 that is in progress at the time.
199
200 This function takes care to be signal-safe.
201
202 Argument: the signal number (SIGUSR1)
203 Returns: nothing
204 */
205
206 static void
207 usr1_handler(int sig)
208 {
209 int fd;
210
211 os_restarting_signal(sig, usr1_handler);
212
213 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
214 if (fd < 0)
215 {
216 /* If we are already running as the Exim user, try to create it in the
217 current process (assuming spool_directory exists). Otherwise, if we are
218 root, do the creation in an exim:exim subprocess. */
219
220 int euid = geteuid();
221 if (euid == exim_uid)
222 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
223 else if (euid == root_uid)
224 fd = log_create_as_exim(process_log_path);
225 }
226
227 /* If we are neither exim nor root, or if we failed to create the log file,
228 give up. There is not much useful we can do with errors, since we don't want
229 to disrupt whatever is going on outside the signal handler. */
230
231 if (fd < 0) return;
232
233 (void)write(fd, process_info, process_info_len);
234 (void)close(fd);
235 }
236
237
238
239 /*************************************************
240 * Timeout handler *
241 *************************************************/
242
243 /* This handler is enabled most of the time that Exim is running. The handler
244 doesn't actually get used unless alarm() has been called to set a timer, to
245 place a time limit on a system call of some kind. When the handler is run, it
246 re-enables itself.
247
248 There are some other SIGALRM handlers that are used in special cases when more
249 than just a flag setting is required; for example, when reading a message's
250 input. These are normally set up in the code module that uses them, and the
251 SIGALRM handler is reset to this one afterwards.
252
253 Argument: the signal value (SIGALRM)
254 Returns: nothing
255 */
256
257 void
258 sigalrm_handler(int sig)
259 {
260 sig = sig; /* Keep picky compilers happy */
261 sigalrm_seen = TRUE;
262 os_non_restarting_signal(SIGALRM, sigalrm_handler);
263 }
264
265
266
267 /*************************************************
268 * Sleep for a fractional time interval *
269 *************************************************/
270
271 /* This function is called by millisleep() and exim_wait_tick() to wait for a
272 period of time that may include a fraction of a second. The coding is somewhat
273 tedious. We do not expect setitimer() ever to fail, but if it does, the process
274 will wait for ever, so we panic in this instance. (There was a case of this
275 when a bug in a function that calls milliwait() caused it to pass invalid data.
276 That's when I added the check. :-)
277
278 We assume it to be not worth sleeping for under 100us; this value will
279 require revisiting as hardware advances. This avoids the issue of
280 a zero-valued timer setting meaning "never fire".
281
282 Argument: an itimerval structure containing the interval
283 Returns: nothing
284 */
285
286 static void
287 milliwait(struct itimerval *itval)
288 {
289 sigset_t sigmask;
290 sigset_t old_sigmask;
291
292 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
293 return;
294 (void)sigemptyset(&sigmask); /* Empty mask */
295 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
296 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
297 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
298 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
299 "setitimer() failed: %s", strerror(errno));
300 (void)sigfillset(&sigmask); /* All signals */
301 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
302 (void)sigsuspend(&sigmask); /* Until SIGALRM */
303 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
304 }
305
306
307
308
309 /*************************************************
310 * Millisecond sleep function *
311 *************************************************/
312
313 /* The basic sleep() function has a granularity of 1 second, which is too rough
314 in some cases - for example, when using an increasing delay to slow down
315 spammers.
316
317 Argument: number of millseconds
318 Returns: nothing
319 */
320
321 void
322 millisleep(int msec)
323 {
324 struct itimerval itval;
325 itval.it_interval.tv_sec = 0;
326 itval.it_interval.tv_usec = 0;
327 itval.it_value.tv_sec = msec/1000;
328 itval.it_value.tv_usec = (msec % 1000) * 1000;
329 milliwait(&itval);
330 }
331
332
333
334 /*************************************************
335 * Compare microsecond times *
336 *************************************************/
337
338 /*
339 Arguments:
340 tv1 the first time
341 tv2 the second time
342
343 Returns: -1, 0, or +1
344 */
345
346 int
347 exim_tvcmp(struct timeval *t1, struct timeval *t2)
348 {
349 if (t1->tv_sec > t2->tv_sec) return +1;
350 if (t1->tv_sec < t2->tv_sec) return -1;
351 if (t1->tv_usec > t2->tv_usec) return +1;
352 if (t1->tv_usec < t2->tv_usec) return -1;
353 return 0;
354 }
355
356
357
358
359 /*************************************************
360 * Clock tick wait function *
361 *************************************************/
362
363 /* Exim uses a time + a pid to generate a unique identifier in two places: its
364 message IDs, and in file names for maildir deliveries. Because some OS now
365 re-use pids within the same second, sub-second times are now being used.
366 However, for absolute certaintly, we must ensure the clock has ticked before
367 allowing the relevant process to complete. At the time of implementation of
368 this code (February 2003), the speed of processors is such that the clock will
369 invariably have ticked already by the time a process has done its job. This
370 function prepares for the time when things are faster - and it also copes with
371 clocks that go backwards.
372
373 Arguments:
374 then_tv A timeval which was used to create uniqueness; its usec field
375 has been rounded down to the value of the resolution.
376 We want to be sure the current time is greater than this.
377 resolution The resolution that was used to divide the microseconds
378 (1 for maildir, larger for message ids)
379
380 Returns: nothing
381 */
382
383 void
384 exim_wait_tick(struct timeval *then_tv, int resolution)
385 {
386 struct timeval now_tv;
387 long int now_true_usec;
388
389 (void)gettimeofday(&now_tv, NULL);
390 now_true_usec = now_tv.tv_usec;
391 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
392
393 if (exim_tvcmp(&now_tv, then_tv) <= 0)
394 {
395 struct itimerval itval;
396 itval.it_interval.tv_sec = 0;
397 itval.it_interval.tv_usec = 0;
398 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
399 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
400
401 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
402 negative value for the microseconds is possible only in the case when "now"
403 is more than a second less than "then". That means that itval.it_value.tv_sec
404 is greater than zero. The following correction is therefore safe. */
405
406 if (itval.it_value.tv_usec < 0)
407 {
408 itval.it_value.tv_usec += 1000000;
409 itval.it_value.tv_sec -= 1;
410 }
411
412 DEBUG(D_transport|D_receive)
413 {
414 if (!running_in_test_harness)
415 {
416 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
417 then_tv->tv_sec, (long) then_tv->tv_usec,
418 now_tv.tv_sec, (long) now_tv.tv_usec);
419 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
420 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
421 }
422 }
423
424 milliwait(&itval);
425 }
426 }
427
428
429
430
431 /*************************************************
432 * Call fopen() with umask 777 and adjust mode *
433 *************************************************/
434
435 /* Exim runs with umask(0) so that files created with open() have the mode that
436 is specified in the open() call. However, there are some files, typically in
437 the spool directory, that are created with fopen(). They end up world-writeable
438 if no precautions are taken. Although the spool directory is not accessible to
439 the world, this is an untidiness. So this is a wrapper function for fopen()
440 that sorts out the mode of the created file.
441
442 Arguments:
443 filename the file name
444 options the fopen() options
445 mode the required mode
446
447 Returns: the fopened FILE or NULL
448 */
449
450 FILE *
451 modefopen(const uschar *filename, const char *options, mode_t mode)
452 {
453 mode_t saved_umask = umask(0777);
454 FILE *f = Ufopen(filename, options);
455 (void)umask(saved_umask);
456 if (f != NULL) (void)fchmod(fileno(f), mode);
457 return f;
458 }
459
460
461
462
463 /*************************************************
464 * Ensure stdin, stdout, and stderr exist *
465 *************************************************/
466
467 /* Some operating systems grumble if an exec() happens without a standard
468 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
469 file will be opened and will use these fd values, and then some other bit of
470 code will assume, for example, that it can write error messages to stderr.
471 This function ensures that fds 0, 1, and 2 are open if they do not already
472 exist, by connecting them to /dev/null.
473
474 This function is also used to ensure that std{in,out,err} exist at all times,
475 so that if any library that Exim calls tries to use them, it doesn't crash.
476
477 Arguments: None
478 Returns: Nothing
479 */
480
481 void
482 exim_nullstd(void)
483 {
484 int i;
485 int devnull = -1;
486 struct stat statbuf;
487 for (i = 0; i <= 2; i++)
488 {
489 if (fstat(i, &statbuf) < 0 && errno == EBADF)
490 {
491 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
492 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
493 string_open_failed(errno, "/dev/null"));
494 if (devnull != i) (void)dup2(devnull, i);
495 }
496 }
497 if (devnull > 2) (void)close(devnull);
498 }
499
500
501
502
503 /*************************************************
504 * Close unwanted file descriptors for delivery *
505 *************************************************/
506
507 /* This function is called from a new process that has been forked to deliver
508 an incoming message, either directly, or using exec.
509
510 We want any smtp input streams to be closed in this new process. However, it
511 has been observed that using fclose() here causes trouble. When reading in -bS
512 input, duplicate copies of messages have been seen. The files will be sharing a
513 file pointer with the parent process, and it seems that fclose() (at least on
514 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
515 least sometimes. Hence we go for closing the underlying file descriptors.
516
517 If TLS is active, we want to shut down the TLS library, but without molesting
518 the parent's SSL connection.
519
520 For delivery of a non-SMTP message, we want to close stdin and stdout (and
521 stderr unless debugging) because the calling process might have set them up as
522 pipes and be waiting for them to close before it waits for the submission
523 process to terminate. If they aren't closed, they hold up the calling process
524 until the initial delivery process finishes, which is not what we want.
525
526 Exception: We do want it for synchronous delivery!
527
528 And notwithstanding all the above, if D_resolver is set, implying resolver
529 debugging, leave stdout open, because that's where the resolver writes its
530 debugging output.
531
532 When we close stderr (which implies we've also closed stdout), we also get rid
533 of any controlling terminal.
534
535 Arguments: None
536 Returns: Nothing
537 */
538
539 static void
540 close_unwanted(void)
541 {
542 if (smtp_input)
543 {
544 #ifdef SUPPORT_TLS
545 tls_close(TRUE, FALSE); /* Shut down the TLS library */
546 #endif
547 (void)close(fileno(smtp_in));
548 (void)close(fileno(smtp_out));
549 smtp_in = NULL;
550 }
551 else
552 {
553 (void)close(0); /* stdin */
554 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
555 if (debug_selector == 0) /* stderr */
556 {
557 if (!synchronous_delivery)
558 {
559 (void)close(2);
560 log_stderr = NULL;
561 }
562 (void)setsid();
563 }
564 }
565 }
566
567
568
569
570 /*************************************************
571 * Set uid and gid *
572 *************************************************/
573
574 /* This function sets a new uid and gid permanently, optionally calling
575 initgroups() to set auxiliary groups. There are some special cases when running
576 Exim in unprivileged modes. In these situations the effective uid will not be
577 root; if we already have the right effective uid/gid, and don't need to
578 initialize any groups, leave things as they are.
579
580 Arguments:
581 uid the uid
582 gid the gid
583 igflag TRUE if initgroups() wanted
584 msg text to use in debugging output and failure log
585
586 Returns: nothing; bombs out on failure
587 */
588
589 void
590 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
591 {
592 uid_t euid = geteuid();
593 gid_t egid = getegid();
594
595 if (euid == root_uid || euid != uid || egid != gid || igflag)
596 {
597 /* At least one OS returns +1 for initgroups failure, so just check for
598 non-zero. */
599
600 if (igflag)
601 {
602 struct passwd *pw = getpwuid(uid);
603 if (pw != NULL)
604 {
605 if (initgroups(pw->pw_name, gid) != 0)
606 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
607 (long int)uid, strerror(errno));
608 }
609 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
610 "no passwd entry for uid=%ld", (long int)uid);
611 }
612
613 if (setgid(gid) < 0 || setuid(uid) < 0)
614 {
615 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
616 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
617 }
618 }
619
620 /* Debugging output included uid/gid and all groups */
621
622 DEBUG(D_uid)
623 {
624 int group_count, save_errno;
625 gid_t group_list[NGROUPS_MAX];
626 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
627 (long int)geteuid(), (long int)getegid(), (long int)getpid());
628 group_count = getgroups(NGROUPS_MAX, group_list);
629 save_errno = errno;
630 debug_printf(" auxiliary group list:");
631 if (group_count > 0)
632 {
633 int i;
634 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
635 }
636 else if (group_count < 0)
637 debug_printf(" <error: %s>", strerror(save_errno));
638 else debug_printf(" <none>");
639 debug_printf("\n");
640 }
641 }
642
643
644
645
646 /*************************************************
647 * Exit point *
648 *************************************************/
649
650 /* Exim exits via this function so that it always clears up any open
651 databases.
652
653 Arguments:
654 rc return code
655
656 Returns: does not return
657 */
658
659 void
660 exim_exit(int rc)
661 {
662 search_tidyup();
663 DEBUG(D_any)
664 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
665 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
666 exit(rc);
667 }
668
669
670
671
672 /*************************************************
673 * Extract port from host address *
674 *************************************************/
675
676 /* Called to extract the port from the values given to -oMa and -oMi.
677 It also checks the syntax of the address, and terminates it before the
678 port data when a port is extracted.
679
680 Argument:
681 address the address, with possible port on the end
682
683 Returns: the port, or zero if there isn't one
684 bombs out on a syntax error
685 */
686
687 static int
688 check_port(uschar *address)
689 {
690 int port = host_address_extract_port(address);
691 if (string_is_ip_address(address, NULL) == 0)
692 {
693 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
694 exit(EXIT_FAILURE);
695 }
696 return port;
697 }
698
699
700
701 /*************************************************
702 * Test/verify an address *
703 *************************************************/
704
705 /* This function is called by the -bv and -bt code. It extracts a working
706 address from a full RFC 822 address. This isn't really necessary per se, but it
707 has the effect of collapsing source routes.
708
709 Arguments:
710 s the address string
711 flags flag bits for verify_address()
712 exit_value to be set for failures
713
714 Returns: nothing
715 */
716
717 static void
718 test_address(uschar *s, int flags, int *exit_value)
719 {
720 int start, end, domain;
721 uschar *parse_error = NULL;
722 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
723 FALSE);
724 if (address == NULL)
725 {
726 fprintf(stdout, "syntax error: %s\n", parse_error);
727 *exit_value = 2;
728 }
729 else
730 {
731 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
732 -1, -1, NULL, NULL, NULL);
733 if (rc == FAIL) *exit_value = 2;
734 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
735 }
736 }
737
738
739
740 /*************************************************
741 * Show supported features *
742 *************************************************/
743
744 /* This function is called for -bV/--version and for -d to output the optional
745 features of the current Exim binary.
746
747 Arguments: a FILE for printing
748 Returns: nothing
749 */
750
751 static void
752 show_whats_supported(FILE *f)
753 {
754 auth_info *authi;
755
756 #ifdef DB_VERSION_STRING
757 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
758 #elif defined(BTREEVERSION) && defined(HASHVERSION)
759 #ifdef USE_DB
760 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
761 #else
762 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
763 #endif
764 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
765 fprintf(f, "Probably ndbm\n");
766 #elif defined(USE_TDB)
767 fprintf(f, "Using tdb\n");
768 #else
769 #ifdef USE_GDBM
770 fprintf(f, "Probably GDBM (native mode)\n");
771 #else
772 fprintf(f, "Probably GDBM (compatibility mode)\n");
773 #endif
774 #endif
775
776 fprintf(f, "Support for:");
777 #ifdef SUPPORT_CRYPTEQ
778 fprintf(f, " crypteq");
779 #endif
780 #if HAVE_ICONV
781 fprintf(f, " iconv()");
782 #endif
783 #if HAVE_IPV6
784 fprintf(f, " IPv6");
785 #endif
786 #ifdef HAVE_SETCLASSRESOURCES
787 fprintf(f, " use_setclassresources");
788 #endif
789 #ifdef SUPPORT_PAM
790 fprintf(f, " PAM");
791 #endif
792 #ifdef EXIM_PERL
793 fprintf(f, " Perl");
794 #endif
795 #ifdef EXPAND_DLFUNC
796 fprintf(f, " Expand_dlfunc");
797 #endif
798 #ifdef USE_TCP_WRAPPERS
799 fprintf(f, " TCPwrappers");
800 #endif
801 #ifdef SUPPORT_TLS
802 #ifdef USE_GNUTLS
803 fprintf(f, " GnuTLS");
804 #else
805 fprintf(f, " OpenSSL");
806 #endif
807 #endif
808 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
809 fprintf(f, " translate_ip_address");
810 #endif
811 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
812 fprintf(f, " move_frozen_messages");
813 #endif
814 #ifdef WITH_CONTENT_SCAN
815 fprintf(f, " Content_Scanning");
816 #endif
817 #ifdef WITH_OLD_DEMIME
818 fprintf(f, " Old_Demime");
819 #endif
820 #ifndef DISABLE_DKIM
821 fprintf(f, " DKIM");
822 #endif
823 #ifndef DISABLE_DNSSEC
824 fprintf(f, " DNSSEC");
825 #endif
826 #ifndef DISABLE_EVENT
827 fprintf(f, " Event");
828 #endif
829 #ifdef SUPPORT_I18N
830 fprintf(f, " I18N");
831 #endif
832 #ifndef DISABLE_OCSP
833 fprintf(f, " OCSP");
834 #endif
835 #ifndef DISABLE_PRDR
836 fprintf(f, " PRDR");
837 #endif
838 #ifdef SUPPORT_PROXY
839 fprintf(f, " PROXY");
840 #endif
841 #ifdef SUPPORT_SOCKS
842 fprintf(f, " SOCKS");
843 #endif
844 #ifdef EXPERIMENTAL_SPF
845 fprintf(f, " Experimental_SPF");
846 #endif
847 #ifdef EXPERIMENTAL_SRS
848 fprintf(f, " Experimental_SRS");
849 #endif
850 #ifdef EXPERIMENTAL_BRIGHTMAIL
851 fprintf(f, " Experimental_Brightmail");
852 #endif
853 #ifdef EXPERIMENTAL_DANE
854 fprintf(f, " Experimental_DANE");
855 #endif
856 #ifdef EXPERIMENTAL_DCC
857 fprintf(f, " Experimental_DCC");
858 #endif
859 #ifdef EXPERIMENTAL_DMARC
860 fprintf(f, " Experimental_DMARC");
861 #endif
862 #ifdef EXPERIMENTAL_DSN_INFO
863 fprintf(f, " Experimental_DSN_info");
864 #endif
865 fprintf(f, "\n");
866
867 fprintf(f, "Lookups (built-in):");
868 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
869 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
870 #endif
871 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
872 fprintf(f, " cdb");
873 #endif
874 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
875 fprintf(f, " dbm dbmjz dbmnz");
876 #endif
877 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
878 fprintf(f, " dnsdb");
879 #endif
880 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
881 fprintf(f, " dsearch");
882 #endif
883 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
884 fprintf(f, " ibase");
885 #endif
886 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
887 fprintf(f, " ldap ldapdn ldapm");
888 #endif
889 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
890 fprintf(f, " mysql");
891 #endif
892 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
893 fprintf(f, " nis nis0");
894 #endif
895 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
896 fprintf(f, " nisplus");
897 #endif
898 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
899 fprintf(f, " oracle");
900 #endif
901 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
902 fprintf(f, " passwd");
903 #endif
904 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
905 fprintf(f, " pgsql");
906 #endif
907 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
908 fprintf(f, " redis");
909 #endif
910 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
911 fprintf(f, " sqlite");
912 #endif
913 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
914 fprintf(f, " testdb");
915 #endif
916 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
917 fprintf(f, " whoson");
918 #endif
919 fprintf(f, "\n");
920
921 fprintf(f, "Authenticators:");
922 #ifdef AUTH_CRAM_MD5
923 fprintf(f, " cram_md5");
924 #endif
925 #ifdef AUTH_CYRUS_SASL
926 fprintf(f, " cyrus_sasl");
927 #endif
928 #ifdef AUTH_DOVECOT
929 fprintf(f, " dovecot");
930 #endif
931 #ifdef AUTH_GSASL
932 fprintf(f, " gsasl");
933 #endif
934 #ifdef AUTH_HEIMDAL_GSSAPI
935 fprintf(f, " heimdal_gssapi");
936 #endif
937 #ifdef AUTH_PLAINTEXT
938 fprintf(f, " plaintext");
939 #endif
940 #ifdef AUTH_SPA
941 fprintf(f, " spa");
942 #endif
943 #ifdef AUTH_TLS
944 fprintf(f, " tls");
945 #endif
946 fprintf(f, "\n");
947
948 fprintf(f, "Routers:");
949 #ifdef ROUTER_ACCEPT
950 fprintf(f, " accept");
951 #endif
952 #ifdef ROUTER_DNSLOOKUP
953 fprintf(f, " dnslookup");
954 #endif
955 #ifdef ROUTER_IPLITERAL
956 fprintf(f, " ipliteral");
957 #endif
958 #ifdef ROUTER_IPLOOKUP
959 fprintf(f, " iplookup");
960 #endif
961 #ifdef ROUTER_MANUALROUTE
962 fprintf(f, " manualroute");
963 #endif
964 #ifdef ROUTER_QUERYPROGRAM
965 fprintf(f, " queryprogram");
966 #endif
967 #ifdef ROUTER_REDIRECT
968 fprintf(f, " redirect");
969 #endif
970 fprintf(f, "\n");
971
972 fprintf(f, "Transports:");
973 #ifdef TRANSPORT_APPENDFILE
974 fprintf(f, " appendfile");
975 #ifdef SUPPORT_MAILDIR
976 fprintf(f, "/maildir");
977 #endif
978 #ifdef SUPPORT_MAILSTORE
979 fprintf(f, "/mailstore");
980 #endif
981 #ifdef SUPPORT_MBX
982 fprintf(f, "/mbx");
983 #endif
984 #endif
985 #ifdef TRANSPORT_AUTOREPLY
986 fprintf(f, " autoreply");
987 #endif
988 #ifdef TRANSPORT_LMTP
989 fprintf(f, " lmtp");
990 #endif
991 #ifdef TRANSPORT_PIPE
992 fprintf(f, " pipe");
993 #endif
994 #ifdef TRANSPORT_SMTP
995 fprintf(f, " smtp");
996 #endif
997 fprintf(f, "\n");
998
999 if (fixed_never_users[0] > 0)
1000 {
1001 int i;
1002 fprintf(f, "Fixed never_users: ");
1003 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1004 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1005 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1006 }
1007
1008 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1009
1010 /* Everything else is details which are only worth reporting when debugging.
1011 Perhaps the tls_version_report should move into this too. */
1012 DEBUG(D_any) do {
1013
1014 int i;
1015
1016 /* clang defines __GNUC__ (at least, for me) so test for it first */
1017 #if defined(__clang__)
1018 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1019 #elif defined(__GNUC__)
1020 fprintf(f, "Compiler: GCC [%s]\n",
1021 # ifdef __VERSION__
1022 __VERSION__
1023 # else
1024 "? unknown version ?"
1025 # endif
1026 );
1027 #else
1028 fprintf(f, "Compiler: <unknown>\n");
1029 #endif
1030
1031 #ifdef SUPPORT_TLS
1032 tls_version_report(f);
1033 #endif
1034 #ifdef SUPPORT_I18N
1035 utf8_version_report(f);
1036 #endif
1037
1038 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1039 if (authi->version_report)
1040 (*authi->version_report)(f);
1041
1042 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1043 characters; unless it's an ancient version of PCRE in which case it
1044 is not defined. */
1045 #ifndef PCRE_PRERELEASE
1046 #define PCRE_PRERELEASE
1047 #endif
1048 #define QUOTE(X) #X
1049 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1050 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1051 " Runtime: %s\n",
1052 PCRE_MAJOR, PCRE_MINOR,
1053 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1054 pcre_version());
1055 #undef QUOTE
1056 #undef EXPAND_AND_QUOTE
1057
1058 init_lookup_list();
1059 for (i = 0; i < lookup_list_count; i++)
1060 if (lookup_list[i]->version_report)
1061 lookup_list[i]->version_report(f);
1062
1063 #ifdef WHITELIST_D_MACROS
1064 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1065 #else
1066 fprintf(f, "WHITELIST_D_MACROS unset\n");
1067 #endif
1068 #ifdef TRUSTED_CONFIG_LIST
1069 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1070 #else
1071 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1072 #endif
1073
1074 } while (0);
1075 }
1076
1077
1078 /*************************************************
1079 * Show auxiliary information about Exim *
1080 *************************************************/
1081
1082 static void
1083 show_exim_information(enum commandline_info request, FILE *stream)
1084 {
1085 const uschar **pp;
1086
1087 switch(request)
1088 {
1089 case CMDINFO_NONE:
1090 fprintf(stream, "Oops, something went wrong.\n");
1091 return;
1092 case CMDINFO_HELP:
1093 fprintf(stream,
1094 "The -bI: flag takes a string indicating which information to provide.\n"
1095 "If the string is not recognised, you'll get this help (on stderr).\n"
1096 "\n"
1097 " exim -bI:help this information\n"
1098 " exim -bI:dscp dscp value keywords known\n"
1099 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1100 );
1101 return;
1102 case CMDINFO_SIEVE:
1103 for (pp = exim_sieve_extension_list; *pp; ++pp)
1104 fprintf(stream, "%s\n", *pp);
1105 return;
1106 case CMDINFO_DSCP:
1107 dscp_list_to_stream(stream);
1108 return;
1109 }
1110 }
1111
1112
1113 /*************************************************
1114 * Quote a local part *
1115 *************************************************/
1116
1117 /* This function is used when a sender address or a From: or Sender: header
1118 line is being created from the caller's login, or from an authenticated_id. It
1119 applies appropriate quoting rules for a local part.
1120
1121 Argument: the local part
1122 Returns: the local part, quoted if necessary
1123 */
1124
1125 uschar *
1126 local_part_quote(uschar *lpart)
1127 {
1128 BOOL needs_quote = FALSE;
1129 int size, ptr;
1130 uschar *yield;
1131 uschar *t;
1132
1133 for (t = lpart; !needs_quote && *t != 0; t++)
1134 {
1135 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1136 (*t != '.' || t == lpart || t[1] == 0);
1137 }
1138
1139 if (!needs_quote) return lpart;
1140
1141 size = ptr = 0;
1142 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1143
1144 for (;;)
1145 {
1146 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1147 if (nq == NULL)
1148 {
1149 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1150 break;
1151 }
1152 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1153 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1154 yield = string_cat(yield, &size, &ptr, nq, 1);
1155 lpart = nq + 1;
1156 }
1157
1158 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1159 yield[ptr] = 0;
1160 return yield;
1161 }
1162
1163
1164
1165 #ifdef USE_READLINE
1166 /*************************************************
1167 * Load readline() functions *
1168 *************************************************/
1169
1170 /* This function is called from testing executions that read data from stdin,
1171 but only when running as the calling user. Currently, only -be does this. The
1172 function loads the readline() function library and passes back the functions.
1173 On some systems, it needs the curses library, so load that too, but try without
1174 it if loading fails. All this functionality has to be requested at build time.
1175
1176 Arguments:
1177 fn_readline_ptr pointer to where to put the readline pointer
1178 fn_addhist_ptr pointer to where to put the addhistory function
1179
1180 Returns: the dlopen handle or NULL on failure
1181 */
1182
1183 static void *
1184 set_readline(char * (**fn_readline_ptr)(const char *),
1185 void (**fn_addhist_ptr)(const char *))
1186 {
1187 void *dlhandle;
1188 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1189
1190 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1191 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1192
1193 if (dlhandle != NULL)
1194 {
1195 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1196 * char * readline (const char *prompt);
1197 * void add_history (const char *string);
1198 */
1199 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1200 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1201 }
1202 else
1203 {
1204 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1205 }
1206
1207 return dlhandle;
1208 }
1209 #endif
1210
1211
1212
1213 /*************************************************
1214 * Get a line from stdin for testing things *
1215 *************************************************/
1216
1217 /* This function is called when running tests that can take a number of lines
1218 of input (for example, -be and -bt). It handles continuations and trailing
1219 spaces. And prompting and a blank line output on eof. If readline() is in use,
1220 the arguments are non-NULL and provide the relevant functions.
1221
1222 Arguments:
1223 fn_readline readline function or NULL
1224 fn_addhist addhist function or NULL
1225
1226 Returns: pointer to dynamic memory, or NULL at end of file
1227 */
1228
1229 static uschar *
1230 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1231 {
1232 int i;
1233 int size = 0;
1234 int ptr = 0;
1235 uschar *yield = NULL;
1236
1237 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1238
1239 for (i = 0;; i++)
1240 {
1241 uschar buffer[1024];
1242 uschar *p, *ss;
1243
1244 #ifdef USE_READLINE
1245 char *readline_line = NULL;
1246 if (fn_readline != NULL)
1247 {
1248 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1249 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1250 p = US readline_line;
1251 }
1252 else
1253 #endif
1254
1255 /* readline() not in use */
1256
1257 {
1258 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1259 p = buffer;
1260 }
1261
1262 /* Handle the line */
1263
1264 ss = p + (int)Ustrlen(p);
1265 while (ss > p && isspace(ss[-1])) ss--;
1266
1267 if (i > 0)
1268 {
1269 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1270 }
1271
1272 yield = string_cat(yield, &size, &ptr, p, ss - p);
1273
1274 #ifdef USE_READLINE
1275 if (fn_readline != NULL) free(readline_line);
1276 #endif
1277
1278 if (ss == p || yield[ptr-1] != '\\')
1279 {
1280 yield[ptr] = 0;
1281 break;
1282 }
1283 yield[--ptr] = 0;
1284 }
1285
1286 if (yield == NULL) printf("\n");
1287 return yield;
1288 }
1289
1290
1291
1292 /*************************************************
1293 * Output usage information for the program *
1294 *************************************************/
1295
1296 /* This function is called when there are no recipients
1297 or a specific --help argument was added.
1298
1299 Arguments:
1300 progname information on what name we were called by
1301
1302 Returns: DOES NOT RETURN
1303 */
1304
1305 static void
1306 exim_usage(uschar *progname)
1307 {
1308
1309 /* Handle specific program invocation varients */
1310 if (Ustrcmp(progname, US"-mailq") == 0)
1311 {
1312 fprintf(stderr,
1313 "mailq - list the contents of the mail queue\n\n"
1314 "For a list of options, see the Exim documentation.\n");
1315 exit(EXIT_FAILURE);
1316 }
1317
1318 /* Generic usage - we output this whatever happens */
1319 fprintf(stderr,
1320 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1321 "not directly from a shell command line. Options and/or arguments control\n"
1322 "what it does when called. For a list of options, see the Exim documentation.\n");
1323
1324 exit(EXIT_FAILURE);
1325 }
1326
1327
1328
1329 /*************************************************
1330 * Validate that the macros given are okay *
1331 *************************************************/
1332
1333 /* Typically, Exim will drop privileges if macros are supplied. In some
1334 cases, we want to not do so.
1335
1336 Arguments: none (macros is a global)
1337 Returns: true if trusted, false otherwise
1338 */
1339
1340 static BOOL
1341 macros_trusted(void)
1342 {
1343 #ifdef WHITELIST_D_MACROS
1344 macro_item *m;
1345 uschar *whitelisted, *end, *p, **whites, **w;
1346 int white_count, i, n;
1347 size_t len;
1348 BOOL prev_char_item, found;
1349 #endif
1350
1351 if (macros == NULL)
1352 return TRUE;
1353 #ifndef WHITELIST_D_MACROS
1354 return FALSE;
1355 #else
1356
1357 /* We only trust -D overrides for some invoking users:
1358 root, the exim run-time user, the optional config owner user.
1359 I don't know why config-owner would be needed, but since they can own the
1360 config files anyway, there's no security risk to letting them override -D. */
1361 if ( ! ((real_uid == root_uid)
1362 || (real_uid == exim_uid)
1363 #ifdef CONFIGURE_OWNER
1364 || (real_uid == config_uid)
1365 #endif
1366 ))
1367 {
1368 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1369 return FALSE;
1370 }
1371
1372 /* Get a list of macros which are whitelisted */
1373 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1374 prev_char_item = FALSE;
1375 white_count = 0;
1376 for (p = whitelisted; *p != '\0'; ++p)
1377 {
1378 if (*p == ':' || isspace(*p))
1379 {
1380 *p = '\0';
1381 if (prev_char_item)
1382 ++white_count;
1383 prev_char_item = FALSE;
1384 continue;
1385 }
1386 if (!prev_char_item)
1387 prev_char_item = TRUE;
1388 }
1389 end = p;
1390 if (prev_char_item)
1391 ++white_count;
1392 if (!white_count)
1393 return FALSE;
1394 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1395 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1396 {
1397 if (*p != '\0')
1398 {
1399 whites[i++] = p;
1400 if (i == white_count)
1401 break;
1402 while (*p != '\0' && p < end)
1403 ++p;
1404 }
1405 }
1406 whites[i] = NULL;
1407
1408 /* The list of macros should be very short. Accept the N*M complexity. */
1409 for (m = macros; m != NULL; m = m->next)
1410 {
1411 found = FALSE;
1412 for (w = whites; *w; ++w)
1413 if (Ustrcmp(*w, m->name) == 0)
1414 {
1415 found = TRUE;
1416 break;
1417 }
1418 if (!found)
1419 return FALSE;
1420 if (m->replacement == NULL)
1421 continue;
1422 len = Ustrlen(m->replacement);
1423 if (len == 0)
1424 continue;
1425 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1426 0, PCRE_EOPT, NULL, 0);
1427 if (n < 0)
1428 {
1429 if (n != PCRE_ERROR_NOMATCH)
1430 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1431 return FALSE;
1432 }
1433 }
1434 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1435 return TRUE;
1436 #endif
1437 }
1438
1439
1440 /*************************************************
1441 * Entry point and high-level code *
1442 *************************************************/
1443
1444 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1445 the appropriate action. All the necessary functions are present in the one
1446 binary. I originally thought one should split it up, but it turns out that so
1447 much of the apparatus is needed in each chunk that one might as well just have
1448 it all available all the time, which then makes the coding easier as well.
1449
1450 Arguments:
1451 argc count of entries in argv
1452 argv argument strings, with argv[0] being the program name
1453
1454 Returns: EXIT_SUCCESS if terminated successfully
1455 EXIT_FAILURE otherwise, except when a message has been sent
1456 to the sender, and -oee was given
1457 */
1458
1459 int
1460 main(int argc, char **cargv)
1461 {
1462 uschar **argv = USS cargv;
1463 int arg_receive_timeout = -1;
1464 int arg_smtp_receive_timeout = -1;
1465 int arg_error_handling = error_handling;
1466 int filter_sfd = -1;
1467 int filter_ufd = -1;
1468 int group_count;
1469 int i, rv;
1470 int list_queue_option = 0;
1471 int msg_action = 0;
1472 int msg_action_arg = -1;
1473 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1474 int queue_only_reason = 0;
1475 #ifdef EXIM_PERL
1476 int perl_start_option = 0;
1477 #endif
1478 int recipients_arg = argc;
1479 int sender_address_domain = 0;
1480 int test_retry_arg = -1;
1481 int test_rewrite_arg = -1;
1482 BOOL arg_queue_only = FALSE;
1483 BOOL bi_option = FALSE;
1484 BOOL checking = FALSE;
1485 BOOL count_queue = FALSE;
1486 BOOL expansion_test = FALSE;
1487 BOOL extract_recipients = FALSE;
1488 BOOL flag_G = FALSE;
1489 BOOL flag_n = FALSE;
1490 BOOL forced_delivery = FALSE;
1491 BOOL f_end_dot = FALSE;
1492 BOOL deliver_give_up = FALSE;
1493 BOOL list_queue = FALSE;
1494 BOOL list_options = FALSE;
1495 BOOL list_config = FALSE;
1496 BOOL local_queue_only;
1497 BOOL more = TRUE;
1498 BOOL one_msg_action = FALSE;
1499 BOOL queue_only_set = FALSE;
1500 BOOL receiving_message = TRUE;
1501 BOOL sender_ident_set = FALSE;
1502 BOOL session_local_queue_only;
1503 BOOL unprivileged;
1504 BOOL removed_privilege = FALSE;
1505 BOOL usage_wanted = FALSE;
1506 BOOL verify_address_mode = FALSE;
1507 BOOL verify_as_sender = FALSE;
1508 BOOL version_printed = FALSE;
1509 uschar *alias_arg = NULL;
1510 uschar *called_as = US"";
1511 uschar *cmdline_syslog_name = NULL;
1512 uschar *start_queue_run_id = NULL;
1513 uschar *stop_queue_run_id = NULL;
1514 uschar *expansion_test_message = NULL;
1515 uschar *ftest_domain = NULL;
1516 uschar *ftest_localpart = NULL;
1517 uschar *ftest_prefix = NULL;
1518 uschar *ftest_suffix = NULL;
1519 uschar *log_oneline = NULL;
1520 uschar *malware_test_file = NULL;
1521 uschar *real_sender_address;
1522 uschar *originator_home = US"/";
1523 size_t sz;
1524 void *reset_point;
1525
1526 struct passwd *pw;
1527 struct stat statbuf;
1528 pid_t passed_qr_pid = (pid_t)0;
1529 int passed_qr_pipe = -1;
1530 gid_t group_list[NGROUPS_MAX];
1531
1532 /* For the -bI: flag */
1533 enum commandline_info info_flag = CMDINFO_NONE;
1534 BOOL info_stdout = FALSE;
1535
1536 /* Possible options for -R and -S */
1537
1538 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1539
1540 /* Need to define this in case we need to change the environment in order
1541 to get rid of a bogus time zone. We have to make it char rather than uschar
1542 because some OS define it in /usr/include/unistd.h. */
1543
1544 extern char **environ;
1545
1546 /* If the Exim user and/or group and/or the configuration file owner/group were
1547 defined by ref:name at build time, we must now find the actual uid/gid values.
1548 This is a feature to make the lives of binary distributors easier. */
1549
1550 #ifdef EXIM_USERNAME
1551 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1552 {
1553 if (exim_uid == 0)
1554 {
1555 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1556 EXIM_USERNAME);
1557 exit(EXIT_FAILURE);
1558 }
1559 /* If ref:name uses a number as the name, route_finduser() returns
1560 TRUE with exim_uid set and pw coerced to NULL. */
1561 if (pw)
1562 exim_gid = pw->pw_gid;
1563 #ifndef EXIM_GROUPNAME
1564 else
1565 {
1566 fprintf(stderr,
1567 "exim: ref:name should specify a usercode, not a group.\n"
1568 "exim: can't let you get away with it unless you also specify a group.\n");
1569 exit(EXIT_FAILURE);
1570 }
1571 #endif
1572 }
1573 else
1574 {
1575 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1576 EXIM_USERNAME);
1577 exit(EXIT_FAILURE);
1578 }
1579 #endif
1580
1581 #ifdef EXIM_GROUPNAME
1582 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1583 {
1584 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1585 EXIM_GROUPNAME);
1586 exit(EXIT_FAILURE);
1587 }
1588 #endif
1589
1590 #ifdef CONFIGURE_OWNERNAME
1591 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1592 {
1593 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1594 CONFIGURE_OWNERNAME);
1595 exit(EXIT_FAILURE);
1596 }
1597 #endif
1598
1599 /* We default the system_filter_user to be the Exim run-time user, as a
1600 sane non-root value. */
1601 system_filter_uid = exim_uid;
1602
1603 #ifdef CONFIGURE_GROUPNAME
1604 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1605 {
1606 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1607 CONFIGURE_GROUPNAME);
1608 exit(EXIT_FAILURE);
1609 }
1610 #endif
1611
1612 /* In the Cygwin environment, some initialization used to need doing.
1613 It was fudged in by means of this macro; now no longer but we'll leave
1614 it in case of others. */
1615
1616 #ifdef OS_INIT
1617 OS_INIT
1618 #endif
1619
1620 /* Check a field which is patched when we are running Exim within its
1621 testing harness; do a fast initial check, and then the whole thing. */
1622
1623 running_in_test_harness =
1624 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1625
1626 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1627 at the start of a program; however, it seems that some environments do not
1628 follow this. A "strange" locale can affect the formatting of timestamps, so we
1629 make quite sure. */
1630
1631 setlocale(LC_ALL, "C");
1632
1633 /* Set up the default handler for timing using alarm(). */
1634
1635 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1636
1637 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1638 because store_malloc writes a log entry on failure. */
1639
1640 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1641 if (log_buffer == NULL)
1642 {
1643 fprintf(stderr, "exim: failed to get store for log buffer\n");
1644 exit(EXIT_FAILURE);
1645 }
1646
1647 /* Initialize the default log options. */
1648
1649 bits_set(log_selector, log_selector_size, log_default);
1650
1651 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1652 NULL when the daemon is run and the file is closed. We have to use this
1653 indirection, because some systems don't allow writing to the variable "stderr".
1654 */
1655
1656 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1657
1658 /* Arrange for the PCRE regex library to use our store functions. Note that
1659 the normal calls are actually macros that add additional arguments for
1660 debugging purposes so we have to assign specially constructed functions here.
1661 The default is to use store in the stacking pool, but this is overridden in the
1662 regex_must_compile() function. */
1663
1664 pcre_malloc = function_store_get;
1665 pcre_free = function_dummy_free;
1666
1667 /* Ensure there is a big buffer for temporary use in several places. It is put
1668 in malloc store so that it can be freed for enlargement if necessary. */
1669
1670 big_buffer = store_malloc(big_buffer_size);
1671
1672 /* Set up the handler for the data request signal, and set the initial
1673 descriptive text. */
1674
1675 set_process_info("initializing");
1676 os_restarting_signal(SIGUSR1, usr1_handler);
1677
1678 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1679 in the daemon code. For the rest of Exim's uses, we ignore it. */
1680
1681 signal(SIGHUP, SIG_IGN);
1682
1683 /* We don't want to die on pipe errors as the code is written to handle
1684 the write error instead. */
1685
1686 signal(SIGPIPE, SIG_IGN);
1687
1688 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1689 set to SIG_IGN. This causes subprocesses that complete before the parent
1690 process waits for them not to hang around, so when Exim calls wait(), nothing
1691 is there. The wait() code has been made robust against this, but let's ensure
1692 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1693 ending status. We use sigaction rather than plain signal() on those OS where
1694 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1695 problem on AIX with this.) */
1696
1697 #ifdef SA_NOCLDWAIT
1698 {
1699 struct sigaction act;
1700 act.sa_handler = SIG_DFL;
1701 sigemptyset(&(act.sa_mask));
1702 act.sa_flags = 0;
1703 sigaction(SIGCHLD, &act, NULL);
1704 }
1705 #else
1706 signal(SIGCHLD, SIG_DFL);
1707 #endif
1708
1709 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1710 SIGHUP. */
1711
1712 sighup_argv = argv;
1713
1714 /* Set up the version number. Set up the leading 'E' for the external form of
1715 message ids, set the pointer to the internal form, and initialize it to
1716 indicate no message being processed. */
1717
1718 version_init();
1719 message_id_option[0] = '-';
1720 message_id_external = message_id_option + 1;
1721 message_id_external[0] = 'E';
1722 message_id = message_id_external + 1;
1723 message_id[0] = 0;
1724
1725 /* Set the umask to zero so that any files Exim creates using open() are
1726 created with the modes that it specifies. NOTE: Files created with fopen() have
1727 a problem, which was not recognized till rather late (February 2006). With this
1728 umask, such files will be world writeable. (They are all content scanning files
1729 in the spool directory, which isn't world-accessible, so this is not a
1730 disaster, but it's untidy.) I don't want to change this overall setting,
1731 however, because it will interact badly with the open() calls. Instead, there's
1732 now a function called modefopen() that fiddles with the umask while calling
1733 fopen(). */
1734
1735 (void)umask(0);
1736
1737 /* Precompile the regular expression for matching a message id. Keep this in
1738 step with the code that generates ids in the accept.c module. We need to do
1739 this here, because the -M options check their arguments for syntactic validity
1740 using mac_ismsgid, which uses this. */
1741
1742 regex_ismsgid =
1743 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1744
1745 /* Precompile the regular expression that is used for matching an SMTP error
1746 code, possibly extended, at the start of an error message. Note that the
1747 terminating whitespace character is included. */
1748
1749 regex_smtp_code =
1750 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1751 FALSE, TRUE);
1752
1753 #ifdef WHITELIST_D_MACROS
1754 /* Precompile the regular expression used to filter the content of macros
1755 given to -D for permissibility. */
1756
1757 regex_whitelisted_macro =
1758 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1759 #endif
1760
1761 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1762
1763 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1764 this seems to be a generally accepted convention, since one finds symbolic
1765 links called "mailq" in standard OS configurations. */
1766
1767 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1768 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1769 {
1770 list_queue = TRUE;
1771 receiving_message = FALSE;
1772 called_as = US"-mailq";
1773 }
1774
1775 /* If the program is called as "rmail" treat it as equivalent to
1776 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1777 i.e. preventing a single dot on a line from terminating the message, and
1778 returning with zero return code, even in cases of error (provided an error
1779 message has been sent). */
1780
1781 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1782 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1783 {
1784 dot_ends = FALSE;
1785 called_as = US"-rmail";
1786 errors_sender_rc = EXIT_SUCCESS;
1787 }
1788
1789 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1790 this is a smail convention. */
1791
1792 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1793 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1794 {
1795 smtp_input = smtp_batched_input = TRUE;
1796 called_as = US"-rsmtp";
1797 }
1798
1799 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1800 this is a smail convention. */
1801
1802 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1803 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1804 {
1805 queue_interval = 0;
1806 receiving_message = FALSE;
1807 called_as = US"-runq";
1808 }
1809
1810 /* If the program is called as "newaliases" treat it as equivalent to
1811 "exim -bi"; this is a sendmail convention. */
1812
1813 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1814 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1815 {
1816 bi_option = TRUE;
1817 receiving_message = FALSE;
1818 called_as = US"-newaliases";
1819 }
1820
1821 /* Save the original effective uid for a couple of uses later. It should
1822 normally be root, but in some esoteric environments it may not be. */
1823
1824 original_euid = geteuid();
1825
1826 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1827 to be the same as the real ones. This makes a difference only if Exim is setuid
1828 (or setgid) to something other than root, which could be the case in some
1829 special configurations. */
1830
1831 real_uid = getuid();
1832 real_gid = getgid();
1833
1834 if (real_uid == root_uid)
1835 {
1836 rv = setgid(real_gid);
1837 if (rv)
1838 {
1839 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1840 (long int)real_gid, strerror(errno));
1841 exit(EXIT_FAILURE);
1842 }
1843 rv = setuid(real_uid);
1844 if (rv)
1845 {
1846 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1847 (long int)real_uid, strerror(errno));
1848 exit(EXIT_FAILURE);
1849 }
1850 }
1851
1852 /* If neither the original real uid nor the original euid was root, Exim is
1853 running in an unprivileged state. */
1854
1855 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1856
1857 /* Scan the program's arguments. Some can be dealt with right away; others are
1858 simply recorded for checking and handling afterwards. Do a high-level switch
1859 on the second character (the one after '-'), to save some effort. */
1860
1861 for (i = 1; i < argc; i++)
1862 {
1863 BOOL badarg = FALSE;
1864 uschar *arg = argv[i];
1865 uschar *argrest;
1866 int switchchar;
1867
1868 /* An argument not starting with '-' is the start of a recipients list;
1869 break out of the options-scanning loop. */
1870
1871 if (arg[0] != '-')
1872 {
1873 recipients_arg = i;
1874 break;
1875 }
1876
1877 /* An option consistion of -- terminates the options */
1878
1879 if (Ustrcmp(arg, "--") == 0)
1880 {
1881 recipients_arg = i + 1;
1882 break;
1883 }
1884
1885 /* Handle flagged options */
1886
1887 switchchar = arg[1];
1888 argrest = arg+2;
1889
1890 /* Make all -ex options synonymous with -oex arguments, since that
1891 is assumed by various callers. Also make -qR options synonymous with -R
1892 options, as that seems to be required as well. Allow for -qqR too, and
1893 the same for -S options. */
1894
1895 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1896 Ustrncmp(arg+1, "qR", 2) == 0 ||
1897 Ustrncmp(arg+1, "qS", 2) == 0)
1898 {
1899 switchchar = arg[2];
1900 argrest++;
1901 }
1902 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1903 {
1904 switchchar = arg[3];
1905 argrest += 2;
1906 queue_2stage = TRUE;
1907 }
1908
1909 /* Make -r synonymous with -f, since it is a documented alias */
1910
1911 else if (arg[1] == 'r') switchchar = 'f';
1912
1913 /* Make -ov synonymous with -v */
1914
1915 else if (Ustrcmp(arg, "-ov") == 0)
1916 {
1917 switchchar = 'v';
1918 argrest++;
1919 }
1920
1921 /* deal with --option_aliases */
1922 else if (switchchar == '-')
1923 {
1924 if (Ustrcmp(argrest, "help") == 0)
1925 {
1926 usage_wanted = TRUE;
1927 break;
1928 }
1929 else if (Ustrcmp(argrest, "version") == 0)
1930 {
1931 switchchar = 'b';
1932 argrest = US"V";
1933 }
1934 }
1935
1936 /* High-level switch on active initial letter */
1937
1938 switch(switchchar)
1939 {
1940
1941 /* sendmail uses -Ac and -Am to control which .cf file is used;
1942 we ignore them. */
1943 case 'A':
1944 if (*argrest == '\0') { badarg = TRUE; break; }
1945 else
1946 {
1947 BOOL ignore = FALSE;
1948 switch (*argrest)
1949 {
1950 case 'c':
1951 case 'm':
1952 if (*(argrest + 1) == '\0')
1953 ignore = TRUE;
1954 break;
1955 }
1956 if (!ignore) { badarg = TRUE; break; }
1957 }
1958 break;
1959
1960 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1961 so has no need of it. */
1962
1963 case 'B':
1964 if (*argrest == 0) i++; /* Skip over the type */
1965 break;
1966
1967
1968 case 'b':
1969 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1970
1971 /* -bd: Run in daemon mode, awaiting SMTP connections.
1972 -bdf: Ditto, but in the foreground.
1973 */
1974
1975 if (*argrest == 'd')
1976 {
1977 daemon_listen = TRUE;
1978 if (*(++argrest) == 'f') background_daemon = FALSE;
1979 else if (*argrest != 0) { badarg = TRUE; break; }
1980 }
1981
1982 /* -be: Run in expansion test mode
1983 -bem: Ditto, but read a message from a file first
1984 */
1985
1986 else if (*argrest == 'e')
1987 {
1988 expansion_test = checking = TRUE;
1989 if (argrest[1] == 'm')
1990 {
1991 if (++i >= argc) { badarg = TRUE; break; }
1992 expansion_test_message = argv[i];
1993 argrest++;
1994 }
1995 if (argrest[1] != 0) { badarg = TRUE; break; }
1996 }
1997
1998 /* -bF: Run system filter test */
1999
2000 else if (*argrest == 'F')
2001 {
2002 filter_test |= FTEST_SYSTEM;
2003 if (*(++argrest) != 0) { badarg = TRUE; break; }
2004 if (++i < argc) filter_test_sfile = argv[i]; else
2005 {
2006 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2007 exit(EXIT_FAILURE);
2008 }
2009 }
2010
2011 /* -bf: Run user filter test
2012 -bfd: Set domain for filter testing
2013 -bfl: Set local part for filter testing
2014 -bfp: Set prefix for filter testing
2015 -bfs: Set suffix for filter testing
2016 */
2017
2018 else if (*argrest == 'f')
2019 {
2020 if (*(++argrest) == 0)
2021 {
2022 filter_test |= FTEST_USER;
2023 if (++i < argc) filter_test_ufile = argv[i]; else
2024 {
2025 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2026 exit(EXIT_FAILURE);
2027 }
2028 }
2029 else
2030 {
2031 if (++i >= argc)
2032 {
2033 fprintf(stderr, "exim: string expected after %s\n", arg);
2034 exit(EXIT_FAILURE);
2035 }
2036 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2037 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2038 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2039 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2040 else { badarg = TRUE; break; }
2041 }
2042 }
2043
2044 /* -bh: Host checking - an IP address must follow. */
2045
2046 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2047 {
2048 if (++i >= argc) { badarg = TRUE; break; }
2049 sender_host_address = argv[i];
2050 host_checking = checking = log_testing_mode = TRUE;
2051 host_checking_callout = argrest[1] == 'c';
2052 }
2053
2054 /* -bi: This option is used by sendmail to initialize *the* alias file,
2055 though it has the -oA option to specify a different file. Exim has no
2056 concept of *the* alias file, but since Sun's YP make script calls
2057 sendmail this way, some support must be provided. */
2058
2059 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2060
2061 /* -bI: provide information, of the type to follow after a colon.
2062 This is an Exim flag. */
2063
2064 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2065 {
2066 uschar *p = &argrest[2];
2067 info_flag = CMDINFO_HELP;
2068 if (Ustrlen(p))
2069 {
2070 if (strcmpic(p, CUS"sieve") == 0)
2071 {
2072 info_flag = CMDINFO_SIEVE;
2073 info_stdout = TRUE;
2074 }
2075 else if (strcmpic(p, CUS"dscp") == 0)
2076 {
2077 info_flag = CMDINFO_DSCP;
2078 info_stdout = TRUE;
2079 }
2080 else if (strcmpic(p, CUS"help") == 0)
2081 {
2082 info_stdout = TRUE;
2083 }
2084 }
2085 }
2086
2087 /* -bm: Accept and deliver message - the default option. Reinstate
2088 receiving_message, which got turned off for all -b options. */
2089
2090 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2091
2092 /* -bmalware: test the filename given for malware */
2093
2094 else if (Ustrcmp(argrest, "malware") == 0)
2095 {
2096 if (++i >= argc) { badarg = TRUE; break; }
2097 malware_test_file = argv[i];
2098 }
2099
2100 /* -bnq: For locally originating messages, do not qualify unqualified
2101 addresses. In the envelope, this causes errors; in header lines they
2102 just get left. */
2103
2104 else if (Ustrcmp(argrest, "nq") == 0)
2105 {
2106 allow_unqualified_sender = FALSE;
2107 allow_unqualified_recipient = FALSE;
2108 }
2109
2110 /* -bpxx: List the contents of the mail queue, in various forms. If
2111 the option is -bpc, just a queue count is needed. Otherwise, if the
2112 first letter after p is r, then order is random. */
2113
2114 else if (*argrest == 'p')
2115 {
2116 if (*(++argrest) == 'c')
2117 {
2118 count_queue = TRUE;
2119 if (*(++argrest) != 0) badarg = TRUE;
2120 break;
2121 }
2122
2123 if (*argrest == 'r')
2124 {
2125 list_queue_option = 8;
2126 argrest++;
2127 }
2128 else list_queue_option = 0;
2129
2130 list_queue = TRUE;
2131
2132 /* -bp: List the contents of the mail queue, top-level only */
2133
2134 if (*argrest == 0) {}
2135
2136 /* -bpu: List the contents of the mail queue, top-level undelivered */
2137
2138 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2139
2140 /* -bpa: List the contents of the mail queue, including all delivered */
2141
2142 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2143
2144 /* Unknown after -bp[r] */
2145
2146 else
2147 {
2148 badarg = TRUE;
2149 break;
2150 }
2151 }
2152
2153
2154 /* -bP: List the configuration variables given as the address list.
2155 Force -v, so configuration errors get displayed. */
2156
2157 else if (Ustrcmp(argrest, "P") == 0)
2158 {
2159 /* -bP config: we need to setup here, because later,
2160 * when list_options is checked, the config is read already */
2161 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2162 {
2163 list_config = TRUE;
2164 readconf_save_config(version_string);
2165 }
2166 else
2167 {
2168 list_options = TRUE;
2169 debug_selector |= D_v;
2170 debug_file = stderr;
2171 }
2172 }
2173
2174 /* -brt: Test retry configuration lookup */
2175
2176 else if (Ustrcmp(argrest, "rt") == 0)
2177 {
2178 test_retry_arg = i + 1;
2179 goto END_ARG;
2180 }
2181
2182 /* -brw: Test rewrite configuration */
2183
2184 else if (Ustrcmp(argrest, "rw") == 0)
2185 {
2186 test_rewrite_arg = i + 1;
2187 goto END_ARG;
2188 }
2189
2190 /* -bS: Read SMTP commands on standard input, but produce no replies -
2191 all errors are reported by sending messages. */
2192
2193 else if (Ustrcmp(argrest, "S") == 0)
2194 smtp_input = smtp_batched_input = receiving_message = TRUE;
2195
2196 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2197 on standard output. */
2198
2199 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2200
2201 /* -bt: address testing mode */
2202
2203 else if (Ustrcmp(argrest, "t") == 0)
2204 address_test_mode = checking = log_testing_mode = TRUE;
2205
2206 /* -bv: verify addresses */
2207
2208 else if (Ustrcmp(argrest, "v") == 0)
2209 verify_address_mode = checking = log_testing_mode = TRUE;
2210
2211 /* -bvs: verify sender addresses */
2212
2213 else if (Ustrcmp(argrest, "vs") == 0)
2214 {
2215 verify_address_mode = checking = log_testing_mode = TRUE;
2216 verify_as_sender = TRUE;
2217 }
2218
2219 /* -bV: Print version string and support details */
2220
2221 else if (Ustrcmp(argrest, "V") == 0)
2222 {
2223 printf("Exim version %s #%s built %s\n", version_string,
2224 version_cnumber, version_date);
2225 printf("%s\n", CS version_copyright);
2226 version_printed = TRUE;
2227 show_whats_supported(stdout);
2228 }
2229
2230 /* -bw: inetd wait mode, accept a listening socket as stdin */
2231
2232 else if (*argrest == 'w')
2233 {
2234 inetd_wait_mode = TRUE;
2235 background_daemon = FALSE;
2236 daemon_listen = TRUE;
2237 if (*(++argrest) != '\0')
2238 {
2239 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2240 if (inetd_wait_timeout <= 0)
2241 {
2242 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2243 exit(EXIT_FAILURE);
2244 }
2245 }
2246 }
2247
2248 else badarg = TRUE;
2249 break;
2250
2251
2252 /* -C: change configuration file list; ignore if it isn't really
2253 a change! Enforce a prefix check if required. */
2254
2255 case 'C':
2256 if (*argrest == 0)
2257 {
2258 if(++i < argc) argrest = argv[i]; else
2259 { badarg = TRUE; break; }
2260 }
2261 if (Ustrcmp(config_main_filelist, argrest) != 0)
2262 {
2263 #ifdef ALT_CONFIG_PREFIX
2264 int sep = 0;
2265 int len = Ustrlen(ALT_CONFIG_PREFIX);
2266 uschar *list = argrest;
2267 uschar *filename;
2268 while((filename = string_nextinlist(&list, &sep, big_buffer,
2269 big_buffer_size)) != NULL)
2270 {
2271 if ((Ustrlen(filename) < len ||
2272 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2273 Ustrstr(filename, "/../") != NULL) &&
2274 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2275 {
2276 fprintf(stderr, "-C Permission denied\n");
2277 exit(EXIT_FAILURE);
2278 }
2279 }
2280 #endif
2281 if (real_uid != root_uid)
2282 {
2283 #ifdef TRUSTED_CONFIG_LIST
2284
2285 if (real_uid != exim_uid
2286 #ifdef CONFIGURE_OWNER
2287 && real_uid != config_uid
2288 #endif
2289 )
2290 trusted_config = FALSE;
2291 else
2292 {
2293 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2294 if (trust_list)
2295 {
2296 struct stat statbuf;
2297
2298 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2299 (statbuf.st_uid != root_uid /* owner not root */
2300 #ifdef CONFIGURE_OWNER
2301 && statbuf.st_uid != config_uid /* owner not the special one */
2302 #endif
2303 ) || /* or */
2304 (statbuf.st_gid != root_gid /* group not root */
2305 #ifdef CONFIGURE_GROUP
2306 && statbuf.st_gid != config_gid /* group not the special one */
2307 #endif
2308 && (statbuf.st_mode & 020) != 0 /* group writeable */
2309 ) || /* or */
2310 (statbuf.st_mode & 2) != 0) /* world writeable */
2311 {
2312 trusted_config = FALSE;
2313 fclose(trust_list);
2314 }
2315 else
2316 {
2317 /* Well, the trust list at least is up to scratch... */
2318 void *reset_point = store_get(0);
2319 uschar *trusted_configs[32];
2320 int nr_configs = 0;
2321 int i = 0;
2322
2323 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2324 {
2325 uschar *start = big_buffer, *nl;
2326 while (*start && isspace(*start))
2327 start++;
2328 if (*start != '/')
2329 continue;
2330 nl = Ustrchr(start, '\n');
2331 if (nl)
2332 *nl = 0;
2333 trusted_configs[nr_configs++] = string_copy(start);
2334 if (nr_configs == 32)
2335 break;
2336 }
2337 fclose(trust_list);
2338
2339 if (nr_configs)
2340 {
2341 int sep = 0;
2342 const uschar *list = argrest;
2343 uschar *filename;
2344 while (trusted_config && (filename = string_nextinlist(&list,
2345 &sep, big_buffer, big_buffer_size)) != NULL)
2346 {
2347 for (i=0; i < nr_configs; i++)
2348 {
2349 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2350 break;
2351 }
2352 if (i == nr_configs)
2353 {
2354 trusted_config = FALSE;
2355 break;
2356 }
2357 }
2358 store_reset(reset_point);
2359 }
2360 else
2361 {
2362 /* No valid prefixes found in trust_list file. */
2363 trusted_config = FALSE;
2364 }
2365 }
2366 }
2367 else
2368 {
2369 /* Could not open trust_list file. */
2370 trusted_config = FALSE;
2371 }
2372 }
2373 #else
2374 /* Not root; don't trust config */
2375 trusted_config = FALSE;
2376 #endif
2377 }
2378
2379 config_main_filelist = argrest;
2380 config_changed = TRUE;
2381 }
2382 break;
2383
2384
2385 /* -D: set up a macro definition */
2386
2387 case 'D':
2388 #ifdef DISABLE_D_OPTION
2389 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2390 exit(EXIT_FAILURE);
2391 #else
2392 {
2393 int ptr = 0;
2394 macro_item *mlast = NULL;
2395 macro_item *m;
2396 uschar name[24];
2397 uschar *s = argrest;
2398
2399 while (isspace(*s)) s++;
2400
2401 if (*s < 'A' || *s > 'Z')
2402 {
2403 fprintf(stderr, "exim: macro name set by -D must start with "
2404 "an upper case letter\n");
2405 exit(EXIT_FAILURE);
2406 }
2407
2408 while (isalnum(*s) || *s == '_')
2409 {
2410 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2411 s++;
2412 }
2413 name[ptr] = 0;
2414 if (ptr == 0) { badarg = TRUE; break; }
2415 while (isspace(*s)) s++;
2416 if (*s != 0)
2417 {
2418 if (*s++ != '=') { badarg = TRUE; break; }
2419 while (isspace(*s)) s++;
2420 }
2421
2422 for (m = macros; m != NULL; m = m->next)
2423 {
2424 if (Ustrcmp(m->name, name) == 0)
2425 {
2426 fprintf(stderr, "exim: duplicated -D in command line\n");
2427 exit(EXIT_FAILURE);
2428 }
2429 mlast = m;
2430 }
2431
2432 m = store_get(sizeof(macro_item) + Ustrlen(name));
2433 m->next = NULL;
2434 m->command_line = TRUE;
2435 if (mlast == NULL) macros = m; else mlast->next = m;
2436 Ustrcpy(m->name, name);
2437 m->replacement = string_copy(s);
2438
2439 if (clmacro_count >= MAX_CLMACROS)
2440 {
2441 fprintf(stderr, "exim: too many -D options on command line\n");
2442 exit(EXIT_FAILURE);
2443 }
2444 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2445 m->replacement);
2446 }
2447 #endif
2448 break;
2449
2450 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2451 The latter is now a no-op, retained for compatibility only. If -dd is used,
2452 debugging subprocesses of the daemon is disabled. */
2453
2454 case 'd':
2455 if (Ustrcmp(argrest, "ropcr") == 0)
2456 {
2457 /* drop_cr = TRUE; */
2458 }
2459
2460 /* Use an intermediate variable so that we don't set debugging while
2461 decoding the debugging bits. */
2462
2463 else
2464 {
2465 unsigned int selector = D_default;
2466 debug_selector = 0;
2467 debug_file = NULL;
2468 if (*argrest == 'd')
2469 {
2470 debug_daemon = TRUE;
2471 argrest++;
2472 }
2473 if (*argrest != 0)
2474 decode_bits(&selector, 1, debug_notall, argrest,
2475 debug_options, debug_options_count, US"debug", 0);
2476 debug_selector = selector;
2477 }
2478 break;
2479
2480
2481 /* -E: This is a local error message. This option is not intended for
2482 external use at all, but is not restricted to trusted callers because it
2483 does no harm (just suppresses certain error messages) and if Exim is run
2484 not setuid root it won't always be trusted when it generates error
2485 messages using this option. If there is a message id following -E, point
2486 message_reference at it, for logging. */
2487
2488 case 'E':
2489 local_error_message = TRUE;
2490 if (mac_ismsgid(argrest)) message_reference = argrest;
2491 break;
2492
2493
2494 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2495 option, so it looks as if historically the -oex options are also callable
2496 without the leading -o. So we have to accept them. Before the switch,
2497 anything starting -oe has been converted to -e. Exim does not support all
2498 of the sendmail error options. */
2499
2500 case 'e':
2501 if (Ustrcmp(argrest, "e") == 0)
2502 {
2503 arg_error_handling = ERRORS_SENDER;
2504 errors_sender_rc = EXIT_SUCCESS;
2505 }
2506 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2507 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2508 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2509 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2510 else badarg = TRUE;
2511 break;
2512
2513
2514 /* -F: Set sender's full name, used instead of the gecos entry from
2515 the password file. Since users can usually alter their gecos entries,
2516 there's no security involved in using this instead. The data can follow
2517 the -F or be in the next argument. */
2518
2519 case 'F':
2520 if (*argrest == 0)
2521 {
2522 if(++i < argc) argrest = argv[i]; else
2523 { badarg = TRUE; break; }
2524 }
2525 originator_name = argrest;
2526 sender_name_forced = TRUE;
2527 break;
2528
2529
2530 /* -f: Set sender's address - this value is only actually used if Exim is
2531 run by a trusted user, or if untrusted_set_sender is set and matches the
2532 address, except that the null address can always be set by any user. The
2533 test for this happens later, when the value given here is ignored when not
2534 permitted. For an untrusted user, the actual sender is still put in Sender:
2535 if it doesn't match the From: header (unless no_local_from_check is set).
2536 The data can follow the -f or be in the next argument. The -r switch is an
2537 obsolete form of -f but since there appear to be programs out there that
2538 use anything that sendmail has ever supported, better accept it - the
2539 synonymizing is done before the switch above.
2540
2541 At this stage, we must allow domain literal addresses, because we don't
2542 know what the setting of allow_domain_literals is yet. Ditto for trailing
2543 dots and strip_trailing_dot. */
2544
2545 case 'f':
2546 {
2547 int dummy_start, dummy_end;
2548 uschar *errmess;
2549 if (*argrest == 0)
2550 {
2551 if (i+1 < argc) argrest = argv[++i]; else
2552 { badarg = TRUE; break; }
2553 }
2554 if (*argrest == 0)
2555 sender_address = string_sprintf(""); /* Ensure writeable memory */
2556 else
2557 {
2558 uschar *temp = argrest + Ustrlen(argrest) - 1;
2559 while (temp >= argrest && isspace(*temp)) temp--;
2560 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2561 allow_domain_literals = TRUE;
2562 strip_trailing_dot = TRUE;
2563 #ifdef SUPPORT_I18N
2564 allow_utf8_domains = TRUE;
2565 #endif
2566 sender_address = parse_extract_address(argrest, &errmess,
2567 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2568 #ifdef SUPPORT_I18N
2569 message_smtputf8 = string_is_utf8(sender_address);
2570 allow_utf8_domains = FALSE;
2571 #endif
2572 allow_domain_literals = FALSE;
2573 strip_trailing_dot = FALSE;
2574 if (sender_address == NULL)
2575 {
2576 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2577 return EXIT_FAILURE;
2578 }
2579 }
2580 sender_address_forced = TRUE;
2581 }
2582 break;
2583
2584 /* -G: sendmail invocation to specify that it's a gateway submission and
2585 sendmail may complain about problems instead of fixing them.
2586 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2587 not at this time complain about problems. */
2588
2589 case 'G':
2590 flag_G = TRUE;
2591 break;
2592
2593 /* -h: Set the hop count for an incoming message. Exim does not currently
2594 support this; it always computes it by counting the Received: headers.
2595 To put it in will require a change to the spool header file format. */
2596
2597 case 'h':
2598 if (*argrest == 0)
2599 {
2600 if(++i < argc) argrest = argv[i]; else
2601 { badarg = TRUE; break; }
2602 }
2603 if (!isdigit(*argrest)) badarg = TRUE;
2604 break;
2605
2606
2607 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2608 not to be documented for sendmail but mailx (at least) uses it) */
2609
2610 case 'i':
2611 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2612 break;
2613
2614
2615 /* -L: set the identifier used for syslog; equivalent to setting
2616 syslog_processname in the config file, but needs to be an admin option. */
2617
2618 case 'L':
2619 if (*argrest == '\0')
2620 {
2621 if(++i < argc) argrest = argv[i]; else
2622 { badarg = TRUE; break; }
2623 }
2624 sz = Ustrlen(argrest);
2625 if (sz > 32)
2626 {
2627 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2628 return EXIT_FAILURE;
2629 }
2630 if (sz < 1)
2631 {
2632 fprintf(stderr, "exim: the -L syslog name is too short\n");
2633 return EXIT_FAILURE;
2634 }
2635 cmdline_syslog_name = argrest;
2636 break;
2637
2638 case 'M':
2639 receiving_message = FALSE;
2640
2641 /* -MC: continue delivery of another message via an existing open
2642 file descriptor. This option is used for an internal call by the
2643 smtp transport when there is a pending message waiting to go to an
2644 address to which it has got a connection. Five subsequent arguments are
2645 required: transport name, host name, IP address, sequence number, and
2646 message_id. Transports may decline to create new processes if the sequence
2647 number gets too big. The channel is stdin. This (-MC) must be the last
2648 argument. There's a subsequent check that the real-uid is privileged.
2649
2650 If we are running in the test harness. delay for a bit, to let the process
2651 that set this one up complete. This makes for repeatability of the logging,
2652 etc. output. */
2653
2654 if (Ustrcmp(argrest, "C") == 0)
2655 {
2656 union sockaddr_46 interface_sock;
2657 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2658
2659 if (argc != i + 6)
2660 {
2661 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2662 return EXIT_FAILURE;
2663 }
2664
2665 if (msg_action_arg >= 0)
2666 {
2667 fprintf(stderr, "exim: incompatible arguments\n");
2668 return EXIT_FAILURE;
2669 }
2670
2671 continue_transport = argv[++i];
2672 continue_hostname = argv[++i];
2673 continue_host_address = argv[++i];
2674 continue_sequence = Uatoi(argv[++i]);
2675 msg_action = MSG_DELIVER;
2676 msg_action_arg = ++i;
2677 forced_delivery = TRUE;
2678 queue_run_pid = passed_qr_pid;
2679 queue_run_pipe = passed_qr_pipe;
2680
2681 if (!mac_ismsgid(argv[i]))
2682 {
2683 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2684 argv[i]);
2685 return EXIT_FAILURE;
2686 }
2687
2688 /* Set up $sending_ip_address and $sending_port */
2689
2690 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2691 &size) == 0)
2692 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2693 &sending_port);
2694 else
2695 {
2696 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2697 strerror(errno));
2698 return EXIT_FAILURE;
2699 }
2700
2701 if (running_in_test_harness) millisleep(500);
2702 break;
2703 }
2704
2705 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2706 precedes -MC (see above). The flag indicates that the host to which
2707 Exim is connected has accepted an AUTH sequence. */
2708
2709 else if (Ustrcmp(argrest, "CA") == 0)
2710 {
2711 smtp_authenticated = TRUE;
2712 break;
2713 }
2714
2715 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2716 that exim is connected to supports the esmtp extension DSN */
2717 else if (Ustrcmp(argrest, "CD") == 0)
2718 {
2719 smtp_use_dsn = TRUE;
2720 break;
2721 }
2722
2723 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2724 it preceded -MC (see above) */
2725
2726 else if (Ustrcmp(argrest, "CP") == 0)
2727 {
2728 smtp_use_pipelining = TRUE;
2729 break;
2730 }
2731
2732 /* -MCQ: pass on the pid of the queue-running process that started
2733 this chain of deliveries and the fd of its synchronizing pipe; this
2734 is useful only when it precedes -MC (see above) */
2735
2736 else if (Ustrcmp(argrest, "CQ") == 0)
2737 {
2738 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2739 else badarg = TRUE;
2740 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2741 else badarg = TRUE;
2742 break;
2743 }
2744
2745 /* -MCS: set the smtp_use_size flag; this is useful only when it
2746 precedes -MC (see above) */
2747
2748 else if (Ustrcmp(argrest, "CS") == 0)
2749 {
2750 smtp_use_size = TRUE;
2751 break;
2752 }
2753
2754 /* -MCT: set the tls_offered flag; this is useful only when it
2755 precedes -MC (see above). The flag indicates that the host to which
2756 Exim is connected has offered TLS support. */
2757
2758 #ifdef SUPPORT_TLS
2759 else if (Ustrcmp(argrest, "CT") == 0)
2760 {
2761 tls_offered = TRUE;
2762 break;
2763 }
2764 #endif
2765
2766 /* -M[x]: various operations on the following list of message ids:
2767 -M deliver the messages, ignoring next retry times and thawing
2768 -Mc deliver the messages, checking next retry times, no thawing
2769 -Mf freeze the messages
2770 -Mg give up on the messages
2771 -Mt thaw the messages
2772 -Mrm remove the messages
2773 In the above cases, this must be the last option. There are also the
2774 following options which are followed by a single message id, and which
2775 act on that message. Some of them use the "recipient" addresses as well.
2776 -Mar add recipient(s)
2777 -Mmad mark all recipients delivered
2778 -Mmd mark recipients(s) delivered
2779 -Mes edit sender
2780 -Mset load a message for use with -be
2781 -Mvb show body
2782 -Mvc show copy (of whole message, in RFC 2822 format)
2783 -Mvh show header
2784 -Mvl show log
2785 */
2786
2787 else if (*argrest == 0)
2788 {
2789 msg_action = MSG_DELIVER;
2790 forced_delivery = deliver_force_thaw = TRUE;
2791 }
2792 else if (Ustrcmp(argrest, "ar") == 0)
2793 {
2794 msg_action = MSG_ADD_RECIPIENT;
2795 one_msg_action = TRUE;
2796 }
2797 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2798 else if (Ustrcmp(argrest, "es") == 0)
2799 {
2800 msg_action = MSG_EDIT_SENDER;
2801 one_msg_action = TRUE;
2802 }
2803 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2804 else if (Ustrcmp(argrest, "g") == 0)
2805 {
2806 msg_action = MSG_DELIVER;
2807 deliver_give_up = TRUE;
2808 }
2809 else if (Ustrcmp(argrest, "mad") == 0)
2810 {
2811 msg_action = MSG_MARK_ALL_DELIVERED;
2812 }
2813 else if (Ustrcmp(argrest, "md") == 0)
2814 {
2815 msg_action = MSG_MARK_DELIVERED;
2816 one_msg_action = TRUE;
2817 }
2818 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2819 else if (Ustrcmp(argrest, "set") == 0)
2820 {
2821 msg_action = MSG_LOAD;
2822 one_msg_action = TRUE;
2823 }
2824 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2825 else if (Ustrcmp(argrest, "vb") == 0)
2826 {
2827 msg_action = MSG_SHOW_BODY;
2828 one_msg_action = TRUE;
2829 }
2830 else if (Ustrcmp(argrest, "vc") == 0)
2831 {
2832 msg_action = MSG_SHOW_COPY;
2833 one_msg_action = TRUE;
2834 }
2835 else if (Ustrcmp(argrest, "vh") == 0)
2836 {
2837 msg_action = MSG_SHOW_HEADER;
2838 one_msg_action = TRUE;
2839 }
2840 else if (Ustrcmp(argrest, "vl") == 0)
2841 {
2842 msg_action = MSG_SHOW_LOG;
2843 one_msg_action = TRUE;
2844 }
2845 else { badarg = TRUE; break; }
2846
2847 /* All the -Mxx options require at least one message id. */
2848
2849 msg_action_arg = i + 1;
2850 if (msg_action_arg >= argc)
2851 {
2852 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2853 return EXIT_FAILURE;
2854 }
2855
2856 /* Some require only message ids to follow */
2857
2858 if (!one_msg_action)
2859 {
2860 int j;
2861 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2862 {
2863 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2864 argv[j], arg);
2865 return EXIT_FAILURE;
2866 }
2867 goto END_ARG; /* Remaining args are ids */
2868 }
2869
2870 /* Others require only one message id, possibly followed by addresses,
2871 which will be handled as normal arguments. */
2872
2873 else
2874 {
2875 if (!mac_ismsgid(argv[msg_action_arg]))
2876 {
2877 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2878 argv[msg_action_arg], arg);
2879 return EXIT_FAILURE;
2880 }
2881 i++;
2882 }
2883 break;
2884
2885
2886 /* Some programs seem to call the -om option without the leading o;
2887 for sendmail it askes for "me too". Exim always does this. */
2888
2889 case 'm':
2890 if (*argrest != 0) badarg = TRUE;
2891 break;
2892
2893
2894 /* -N: don't do delivery - a debugging option that stops transports doing
2895 their thing. It implies debugging at the D_v level. */
2896
2897 case 'N':
2898 if (*argrest == 0)
2899 {
2900 dont_deliver = TRUE;
2901 debug_selector |= D_v;
2902 debug_file = stderr;
2903 }
2904 else badarg = TRUE;
2905 break;
2906
2907
2908 /* -n: This means "don't alias" in sendmail, apparently.
2909 For normal invocations, it has no effect.
2910 It may affect some other options. */
2911
2912 case 'n':
2913 flag_n = TRUE;
2914 break;
2915
2916 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2917 option to the specified value. This form uses long names. We need to handle
2918 -O option=value and -Ooption=value. */
2919
2920 case 'O':
2921 if (*argrest == 0)
2922 {
2923 if (++i >= argc)
2924 {
2925 fprintf(stderr, "exim: string expected after -O\n");
2926 exit(EXIT_FAILURE);
2927 }
2928 }
2929 break;
2930
2931 case 'o':
2932
2933 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2934 file" option). */
2935
2936 if (*argrest == 'A')
2937 {
2938 alias_arg = argrest + 1;
2939 if (alias_arg[0] == 0)
2940 {
2941 if (i+1 < argc) alias_arg = argv[++i]; else
2942 {
2943 fprintf(stderr, "exim: string expected after -oA\n");
2944 exit(EXIT_FAILURE);
2945 }
2946 }
2947 }
2948
2949 /* -oB: Set a connection message max value for remote deliveries */
2950
2951 else if (*argrest == 'B')
2952 {
2953 uschar *p = argrest + 1;
2954 if (p[0] == 0)
2955 {
2956 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2957 {
2958 connection_max_messages = 1;
2959 p = NULL;
2960 }
2961 }
2962
2963 if (p != NULL)
2964 {
2965 if (!isdigit(*p))
2966 {
2967 fprintf(stderr, "exim: number expected after -oB\n");
2968 exit(EXIT_FAILURE);
2969 }
2970 connection_max_messages = Uatoi(p);
2971 }
2972 }
2973
2974 /* -odb: background delivery */
2975
2976 else if (Ustrcmp(argrest, "db") == 0)
2977 {
2978 synchronous_delivery = FALSE;
2979 arg_queue_only = FALSE;
2980 queue_only_set = TRUE;
2981 }
2982
2983 /* -odf: foreground delivery (smail-compatible option); same effect as
2984 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2985 */
2986
2987 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2988 {
2989 synchronous_delivery = TRUE;
2990 arg_queue_only = FALSE;
2991 queue_only_set = TRUE;
2992 }
2993
2994 /* -odq: queue only */
2995
2996 else if (Ustrcmp(argrest, "dq") == 0)
2997 {
2998 synchronous_delivery = FALSE;
2999 arg_queue_only = TRUE;
3000 queue_only_set = TRUE;
3001 }
3002
3003 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3004 but no remote delivery */
3005
3006 else if (Ustrcmp(argrest, "dqs") == 0)
3007 {
3008 queue_smtp = TRUE;
3009 arg_queue_only = FALSE;
3010 queue_only_set = TRUE;
3011 }
3012
3013 /* -oex: Sendmail error flags. As these are also accepted without the
3014 leading -o prefix, for compatibility with vacation and other callers,
3015 they are handled with -e above. */
3016
3017 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3018 -oitrue: Another sendmail syntax for the same */
3019
3020 else if (Ustrcmp(argrest, "i") == 0 ||
3021 Ustrcmp(argrest, "itrue") == 0)
3022 dot_ends = FALSE;
3023
3024 /* -oM*: Set various characteristics for an incoming message; actually
3025 acted on for trusted callers only. */
3026
3027 else if (*argrest == 'M')
3028 {
3029 if (i+1 >= argc)
3030 {
3031 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3032 exit(EXIT_FAILURE);
3033 }
3034
3035 /* -oMa: Set sender host address */
3036
3037 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3038
3039 /* -oMaa: Set authenticator name */
3040
3041 else if (Ustrcmp(argrest, "Maa") == 0)
3042 sender_host_authenticated = argv[++i];
3043
3044 /* -oMas: setting authenticated sender */
3045
3046 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3047
3048 /* -oMai: setting authenticated id */
3049
3050 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3051
3052 /* -oMi: Set incoming interface address */
3053
3054 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3055
3056 /* -oMm: Message reference */
3057
3058 else if (Ustrcmp(argrest, "Mm") == 0)
3059 {
3060 if (!mac_ismsgid(argv[i+1]))
3061 {
3062 fprintf(stderr,"-oMm must be a valid message ID\n");
3063 exit(EXIT_FAILURE);
3064 }
3065 if (!trusted_config)
3066 {
3067 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3068 exit(EXIT_FAILURE);
3069 }
3070 message_reference = argv[++i];
3071 }
3072
3073 /* -oMr: Received protocol */
3074
3075 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3076
3077 /* -oMs: Set sender host name */
3078
3079 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3080
3081 /* -oMt: Set sender ident */
3082
3083 else if (Ustrcmp(argrest, "Mt") == 0)
3084 {
3085 sender_ident_set = TRUE;
3086 sender_ident = argv[++i];
3087 }
3088
3089 /* Else a bad argument */
3090
3091 else
3092 {
3093 badarg = TRUE;
3094 break;
3095 }
3096 }
3097
3098 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3099 seem to call this as -m (undocumented), so that is also accepted (see
3100 above). */
3101
3102 else if (Ustrcmp(argrest, "m") == 0) {}
3103
3104 /* -oo: An ancient flag for old-style addresses which still seems to
3105 crop up in some calls (see in SCO). */
3106
3107 else if (Ustrcmp(argrest, "o") == 0) {}
3108
3109 /* -oP <name>: set pid file path for daemon */
3110
3111 else if (Ustrcmp(argrest, "P") == 0)
3112 override_pid_file_path = argv[++i];
3113
3114 /* -or <n>: set timeout for non-SMTP acceptance
3115 -os <n>: set timeout for SMTP acceptance */
3116
3117 else if (*argrest == 'r' || *argrest == 's')
3118 {
3119 int *tp = (*argrest == 'r')?
3120 &arg_receive_timeout : &arg_smtp_receive_timeout;
3121 if (argrest[1] == 0)
3122 {
3123 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3124 }
3125 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3126 if (*tp < 0)
3127 {
3128 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3129 exit(EXIT_FAILURE);
3130 }
3131 }
3132
3133 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3134
3135 else if (Ustrcmp(argrest, "X") == 0)
3136 override_local_interfaces = argv[++i];
3137
3138 /* Unknown -o argument */
3139
3140 else badarg = TRUE;
3141 break;
3142
3143
3144 /* -ps: force Perl startup; -pd force delayed Perl startup */
3145
3146 case 'p':
3147 #ifdef EXIM_PERL
3148 if (*argrest == 's' && argrest[1] == 0)
3149 {
3150 perl_start_option = 1;
3151 break;
3152 }
3153 if (*argrest == 'd' && argrest[1] == 0)
3154 {
3155 perl_start_option = -1;
3156 break;
3157 }
3158 #endif
3159
3160 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3161 which sets the host protocol and host name */
3162
3163 if (*argrest == 0)
3164 {
3165 if (i+1 < argc) argrest = argv[++i]; else
3166 { badarg = TRUE; break; }
3167 }
3168
3169 if (*argrest != 0)
3170 {
3171 uschar *hn = Ustrchr(argrest, ':');
3172 if (hn == NULL)
3173 {
3174 received_protocol = argrest;
3175 }
3176 else
3177 {
3178 received_protocol = string_copyn(argrest, hn - argrest);
3179 sender_host_name = hn + 1;
3180 }
3181 }
3182 break;
3183
3184
3185 case 'q':
3186 receiving_message = FALSE;
3187 if (queue_interval >= 0)
3188 {
3189 fprintf(stderr, "exim: -q specified more than once\n");
3190 exit(EXIT_FAILURE);
3191 }
3192
3193 /* -qq...: Do queue runs in a 2-stage manner */
3194
3195 if (*argrest == 'q')
3196 {
3197 queue_2stage = TRUE;
3198 argrest++;
3199 }
3200
3201 /* -qi...: Do only first (initial) deliveries */
3202
3203 if (*argrest == 'i')
3204 {
3205 queue_run_first_delivery = TRUE;
3206 argrest++;
3207 }
3208
3209 /* -qf...: Run the queue, forcing deliveries
3210 -qff..: Ditto, forcing thawing as well */
3211
3212 if (*argrest == 'f')
3213 {
3214 queue_run_force = TRUE;
3215 if (*(++argrest) == 'f')
3216 {
3217 deliver_force_thaw = TRUE;
3218 argrest++;
3219 }
3220 }
3221
3222 /* -q[f][f]l...: Run the queue only on local deliveries */
3223
3224 if (*argrest == 'l')
3225 {
3226 queue_run_local = TRUE;
3227 argrest++;
3228 }
3229
3230 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3231 optionally starting from a given message id. */
3232
3233 if (*argrest == 0 &&
3234 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3235 {
3236 queue_interval = 0;
3237 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3238 start_queue_run_id = argv[++i];
3239 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3240 stop_queue_run_id = argv[++i];
3241 }
3242
3243 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3244 optionally local only. */
3245
3246 else
3247 {
3248 if (*argrest != 0)
3249 queue_interval = readconf_readtime(argrest, 0, FALSE);
3250 else
3251 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3252 if (queue_interval <= 0)
3253 {
3254 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3255 exit(EXIT_FAILURE);
3256 }
3257 }
3258 break;
3259
3260
3261 case 'R': /* Synonymous with -qR... */
3262 receiving_message = FALSE;
3263
3264 /* -Rf: As -R (below) but force all deliveries,
3265 -Rff: Ditto, but also thaw all frozen messages,
3266 -Rr: String is regex
3267 -Rrf: Regex and force
3268 -Rrff: Regex and force and thaw
3269
3270 in all cases provided there are no further characters in this
3271 argument. */
3272
3273 if (*argrest != 0)
3274 {
3275 int i;
3276 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3277 {
3278 if (Ustrcmp(argrest, rsopts[i]) == 0)
3279 {
3280 if (i != 2) queue_run_force = TRUE;
3281 if (i >= 2) deliver_selectstring_regex = TRUE;
3282 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3283 argrest += Ustrlen(rsopts[i]);
3284 }
3285 }
3286 }
3287
3288 /* -R: Set string to match in addresses for forced queue run to
3289 pick out particular messages. */
3290
3291 if (*argrest == 0)
3292 {
3293 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3294 {
3295 fprintf(stderr, "exim: string expected after -R\n");
3296 exit(EXIT_FAILURE);
3297 }
3298 }
3299 else deliver_selectstring = argrest;
3300 break;
3301
3302
3303 /* -r: an obsolete synonym for -f (see above) */
3304
3305
3306 /* -S: Like -R but works on sender. */
3307
3308 case 'S': /* Synonymous with -qS... */
3309 receiving_message = FALSE;
3310
3311 /* -Sf: As -S (below) but force all deliveries,
3312 -Sff: Ditto, but also thaw all frozen messages,
3313 -Sr: String is regex
3314 -Srf: Regex and force
3315 -Srff: Regex and force and thaw
3316
3317 in all cases provided there are no further characters in this
3318 argument. */
3319
3320 if (*argrest != 0)
3321 {
3322 int i;
3323 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3324 {
3325 if (Ustrcmp(argrest, rsopts[i]) == 0)
3326 {
3327 if (i != 2) queue_run_force = TRUE;
3328 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3329 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3330 argrest += Ustrlen(rsopts[i]);
3331 }
3332 }
3333 }
3334
3335 /* -S: Set string to match in addresses for forced queue run to
3336 pick out particular messages. */
3337
3338 if (*argrest == 0)
3339 {
3340 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3341 {
3342 fprintf(stderr, "exim: string expected after -S\n");
3343 exit(EXIT_FAILURE);
3344 }
3345 }
3346 else deliver_selectstring_sender = argrest;
3347 break;
3348
3349 /* -Tqt is an option that is exclusively for use by the testing suite.
3350 It is not recognized in other circumstances. It allows for the setting up
3351 of explicit "queue times" so that various warning/retry things can be
3352 tested. Otherwise variability of clock ticks etc. cause problems. */
3353
3354 case 'T':
3355 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3356 fudged_queue_times = argv[++i];
3357 else badarg = TRUE;
3358 break;
3359
3360
3361 /* -t: Set flag to extract recipients from body of message. */
3362
3363 case 't':
3364 if (*argrest == 0) extract_recipients = TRUE;
3365
3366 /* -ti: Set flag to extract recipients from body of message, and also
3367 specify that dot does not end the message. */
3368
3369 else if (Ustrcmp(argrest, "i") == 0)
3370 {
3371 extract_recipients = TRUE;
3372 dot_ends = FALSE;
3373 }
3374
3375 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3376
3377 #ifdef SUPPORT_TLS
3378 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3379 #endif
3380
3381 else badarg = TRUE;
3382 break;
3383
3384
3385 /* -U: This means "initial user submission" in sendmail, apparently. The
3386 doc claims that in future sendmail may refuse syntactically invalid
3387 messages instead of fixing them. For the moment, we just ignore it. */
3388
3389 case 'U':
3390 break;
3391
3392
3393 /* -v: verify things - this is a very low-level debugging */
3394
3395 case 'v':
3396 if (*argrest == 0)
3397 {
3398 debug_selector |= D_v;
3399 debug_file = stderr;
3400 }
3401 else badarg = TRUE;
3402 break;
3403
3404
3405 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3406
3407 The -x flag tells the sendmail command that mail from a local
3408 mail program has National Language Support (NLS) extended characters
3409 in the body of the mail item. The sendmail command can send mail with
3410 extended NLS characters across networks that normally corrupts these
3411 8-bit characters.
3412
3413 As Exim is 8-bit clean, it just ignores this flag. */
3414
3415 case 'x':
3416 if (*argrest != 0) badarg = TRUE;
3417 break;
3418
3419 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3420 logs to that file. We swallow the parameter and otherwise ignore it. */
3421
3422 case 'X':
3423 if (*argrest == '\0')
3424 if (++i >= argc)
3425 {
3426 fprintf(stderr, "exim: string expected after -X\n");
3427 exit(EXIT_FAILURE);
3428 }
3429 break;
3430
3431 case 'z':
3432 if (*argrest == '\0')
3433 if (++i < argc) log_oneline = argv[i]; else
3434 {
3435 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3436 exit(EXIT_FAILURE);
3437 }
3438 break;
3439
3440 /* All other initial characters are errors */
3441
3442 default:
3443 badarg = TRUE;
3444 break;
3445 } /* End of high-level switch statement */
3446
3447 /* Failed to recognize the option, or syntax error */
3448
3449 if (badarg)
3450 {
3451 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3452 "option %s\n", arg);
3453 exit(EXIT_FAILURE);
3454 }
3455 }
3456
3457
3458 /* If -R or -S have been specified without -q, assume a single queue run. */
3459
3460 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3461 queue_interval < 0) queue_interval = 0;
3462
3463
3464 END_ARG:
3465 /* If usage_wanted is set we call the usage function - which never returns */
3466 if (usage_wanted) exim_usage(called_as);
3467
3468 /* Arguments have been processed. Check for incompatibilities. */
3469 if ((
3470 (smtp_input || extract_recipients || recipients_arg < argc) &&
3471 (daemon_listen || queue_interval >= 0 || bi_option ||
3472 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3473 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3474 ) ||
3475 (
3476 msg_action_arg > 0 &&
3477 (daemon_listen || queue_interval >= 0 || list_options ||
3478 (checking && msg_action != MSG_LOAD) ||
3479 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3480 ) ||
3481 (
3482 (daemon_listen || queue_interval >= 0) &&
3483 (sender_address != NULL || list_options || list_queue || checking ||
3484 bi_option)
3485 ) ||
3486 (
3487 daemon_listen && queue_interval == 0
3488 ) ||
3489 (
3490 inetd_wait_mode && queue_interval >= 0
3491 ) ||
3492 (
3493 list_options &&
3494 (checking || smtp_input || extract_recipients ||
3495 filter_test != FTEST_NONE || bi_option)
3496 ) ||
3497 (
3498 verify_address_mode &&
3499 (address_test_mode || smtp_input || extract_recipients ||
3500 filter_test != FTEST_NONE || bi_option)
3501 ) ||
3502 (
3503 address_test_mode && (smtp_input || extract_recipients ||
3504 filter_test != FTEST_NONE || bi_option)
3505 ) ||
3506 (
3507 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3508 extract_recipients)
3509 ) ||
3510 (
3511 deliver_selectstring != NULL && queue_interval < 0
3512 ) ||
3513 (
3514 msg_action == MSG_LOAD &&
3515 (!expansion_test || expansion_test_message != NULL)
3516 )
3517 )
3518 {
3519 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3520 exit(EXIT_FAILURE);
3521 }
3522
3523 /* If debugging is set up, set the file and the file descriptor to pass on to
3524 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3525 to run in the foreground. */
3526
3527 if (debug_selector != 0)
3528 {
3529 debug_file = stderr;
3530 debug_fd = fileno(debug_file);
3531 background_daemon = FALSE;
3532 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3533 if (debug_selector != D_v) /* -v only doesn't show this */
3534 {
3535 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3536 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3537 debug_selector);
3538 if (!version_printed)
3539 show_whats_supported(stderr);
3540 }
3541 }
3542
3543 /* When started with root privilege, ensure that the limits on the number of
3544 open files and the number of processes (where that is accessible) are
3545 sufficiently large, or are unset, in case Exim has been called from an
3546 environment where the limits are screwed down. Not all OS have the ability to
3547 change some of these limits. */
3548
3549 if (unprivileged)
3550 {
3551 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3552 }
3553 else
3554 {
3555 struct rlimit rlp;
3556
3557 #ifdef RLIMIT_NOFILE
3558 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3559 {
3560 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3561 strerror(errno));
3562 rlp.rlim_cur = rlp.rlim_max = 0;
3563 }
3564
3565 /* I originally chose 1000 as a nice big number that was unlikely to
3566 be exceeded. It turns out that some older OS have a fixed upper limit of
3567 256. */
3568
3569 if (rlp.rlim_cur < 1000)
3570 {
3571 rlp.rlim_cur = rlp.rlim_max = 1000;
3572 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3573 {
3574 rlp.rlim_cur = rlp.rlim_max = 256;
3575 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3576 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3577 strerror(errno));
3578 }
3579 }
3580 #endif
3581
3582 #ifdef RLIMIT_NPROC
3583 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3584 {
3585 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3586 strerror(errno));
3587 rlp.rlim_cur = rlp.rlim_max = 0;
3588 }
3589
3590 #ifdef RLIM_INFINITY
3591 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3592 {
3593 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3594 #else
3595 if (rlp.rlim_cur < 1000)
3596 {
3597 rlp.rlim_cur = rlp.rlim_max = 1000;
3598 #endif
3599 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3600 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3601 strerror(errno));
3602 }
3603 #endif
3604 }
3605
3606 /* Exim is normally entered as root (but some special configurations are
3607 possible that don't do this). However, it always spins off sub-processes that
3608 set their uid and gid as required for local delivery. We don't want to pass on
3609 any extra groups that root may belong to, so we want to get rid of them all at
3610 this point.
3611
3612 We need to obey setgroups() at this stage, before possibly giving up root
3613 privilege for a changed configuration file, but later on we might need to
3614 check on the additional groups for the admin user privilege - can't do that
3615 till after reading the config, which might specify the exim gid. Therefore,
3616 save the group list here first. */
3617
3618 group_count = getgroups(NGROUPS_MAX, group_list);
3619 if (group_count < 0)
3620 {
3621 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3622 exit(EXIT_FAILURE);
3623 }
3624
3625 /* There is a fundamental difference in some BSD systems in the matter of
3626 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3627 known not to be different. On the "different" systems there is a single group
3628 list, and the first entry in it is the current group. On all other versions of
3629 Unix there is a supplementary group list, which is in *addition* to the current
3630 group. Consequently, to get rid of all extraneous groups on a "standard" system
3631 you pass over 0 groups to setgroups(), while on a "different" system you pass
3632 over a single group - the current group, which is always the first group in the
3633 list. Calling setgroups() with zero groups on a "different" system results in
3634 an error return. The following code should cope with both types of system.
3635
3636 However, if this process isn't running as root, setgroups() can't be used
3637 since you have to be root to run it, even if throwing away groups. Not being
3638 root here happens only in some unusual configurations. We just ignore the
3639 error. */
3640
3641 if (setgroups(0, NULL) != 0)
3642 {
3643 if (setgroups(1, group_list) != 0 && !unprivileged)
3644 {
3645 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3646 exit(EXIT_FAILURE);
3647 }
3648 }
3649
3650 /* If the configuration file name has been altered by an argument on the
3651 command line (either a new file name or a macro definition) and the caller is
3652 not root, or if this is a filter testing run, remove any setuid privilege the
3653 program has and run as the underlying user.
3654
3655 The exim user is locked out of this, which severely restricts the use of -C
3656 for some purposes.
3657
3658 Otherwise, set the real ids to the effective values (should be root unless run
3659 from inetd, which it can either be root or the exim uid, if one is configured).
3660
3661 There is a private mechanism for bypassing some of this, in order to make it
3662 possible to test lots of configurations automatically, without having either to
3663 recompile each time, or to patch in an actual configuration file name and other
3664 values (such as the path name). If running in the test harness, pretend that
3665 configuration file changes and macro definitions haven't happened. */
3666
3667 if (( /* EITHER */
3668 (!trusted_config || /* Config changed, or */
3669 !macros_trusted()) && /* impermissible macros and */
3670 real_uid != root_uid && /* Not root, and */
3671 !running_in_test_harness /* Not fudged */
3672 ) || /* OR */
3673 expansion_test /* expansion testing */
3674 || /* OR */
3675 filter_test != FTEST_NONE) /* Filter testing */
3676 {
3677 setgroups(group_count, group_list);
3678 exim_setugid(real_uid, real_gid, FALSE,
3679 US"-C, -D, -be or -bf forces real uid");
3680 removed_privilege = TRUE;
3681
3682 /* In the normal case when Exim is called like this, stderr is available
3683 and should be used for any logging information because attempts to write
3684 to the log will usually fail. To arrange this, we unset really_exim. However,
3685 if no stderr is available there is no point - we might as well have a go
3686 at the log (if it fails, syslog will be written).
3687
3688 Note that if the invoker is Exim, the logs remain available. Messing with
3689 this causes unlogged successful deliveries. */
3690
3691 if ((log_stderr != NULL) && (real_uid != exim_uid))
3692 really_exim = FALSE;
3693 }
3694
3695 /* Privilege is to be retained for the moment. It may be dropped later,
3696 depending on the job that this Exim process has been asked to do. For now, set
3697 the real uid to the effective so that subsequent re-execs of Exim are done by a
3698 privileged user. */
3699
3700 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3701
3702 /* If testing a filter, open the file(s) now, before wasting time doing other
3703 setups and reading the message. */
3704
3705 if ((filter_test & FTEST_SYSTEM) != 0)
3706 {
3707 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3708 if (filter_sfd < 0)
3709 {
3710 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3711 strerror(errno));
3712 return EXIT_FAILURE;
3713 }
3714 }
3715
3716 if ((filter_test & FTEST_USER) != 0)
3717 {
3718 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3719 if (filter_ufd < 0)
3720 {
3721 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3722 strerror(errno));
3723 return EXIT_FAILURE;
3724 }
3725 }
3726
3727 /* Initialise lookup_list
3728 If debugging, already called above via version reporting.
3729 In either case, we initialise the list of available lookups while running
3730 as root. All dynamically modules are loaded from a directory which is
3731 hard-coded into the binary and is code which, if not a module, would be
3732 part of Exim already. Ability to modify the content of the directory
3733 is equivalent to the ability to modify a setuid binary!
3734
3735 This needs to happen before we read the main configuration. */
3736 init_lookup_list();
3737
3738 #ifdef SUPPORT_I18N
3739 if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3740 #endif
3741
3742 /* Read the main runtime configuration data; this gives up if there
3743 is a failure. It leaves the configuration file open so that the subsequent
3744 configuration data for delivery can be read if needed. */
3745
3746 readconf_main();
3747
3748 /* If an action on specific messages is requested, or if a daemon or queue
3749 runner is being started, we need to know if Exim was called by an admin user.
3750 This is the case if the real user is root or exim, or if the real group is
3751 exim, or if one of the supplementary groups is exim or a group listed in
3752 admin_groups. We don't fail all message actions immediately if not admin_user,
3753 since some actions can be performed by non-admin users. Instead, set admin_user
3754 for later interrogation. */
3755
3756 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3757 admin_user = TRUE;
3758 else
3759 {
3760 int i, j;
3761 for (i = 0; i < group_count; i++)
3762 {
3763 if (group_list[i] == exim_gid) admin_user = TRUE;
3764 else if (admin_groups != NULL)
3765 {
3766 for (j = 1; j <= (int)(admin_groups[0]); j++)
3767 if (admin_groups[j] == group_list[i])
3768 { admin_user = TRUE; break; }
3769 }
3770 if (admin_user) break;
3771 }
3772 }
3773
3774 /* Another group of privileged users are the trusted users. These are root,
3775 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3776 are permitted to specify sender_addresses with -f on the command line, and
3777 other message parameters as well. */
3778
3779 if (real_uid == root_uid || real_uid == exim_uid)
3780 trusted_caller = TRUE;
3781 else
3782 {
3783 int i, j;
3784
3785 if (trusted_users != NULL)
3786 {
3787 for (i = 1; i <= (int)(trusted_users[0]); i++)
3788 if (trusted_users[i] == real_uid)
3789 { trusted_caller = TRUE; break; }
3790 }
3791
3792 if (!trusted_caller && trusted_groups != NULL)
3793 {
3794 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3795 {
3796 if (trusted_groups[i] == real_gid)
3797 trusted_caller = TRUE;
3798 else for (j = 0; j < group_count; j++)
3799 {
3800 if (trusted_groups[i] == group_list[j])
3801 { trusted_caller = TRUE; break; }
3802 }
3803 if (trusted_caller) break;
3804 }
3805 }
3806 }
3807
3808 /* Handle the decoding of logging options. */
3809
3810 decode_bits(log_selector, log_selector_size, log_notall,
3811 log_selector_string, log_options, log_options_count, US"log", 0);
3812
3813 DEBUG(D_any)
3814 {
3815 int i;
3816 debug_printf("configuration file is %s\n", config_main_filename);
3817 debug_printf("log selectors =");
3818 for (i = 0; i < log_selector_size; i++)
3819 debug_printf(" %08x", log_selector[i]);
3820 debug_printf("\n");
3821 }
3822
3823 /* If domain literals are not allowed, check the sender address that was
3824 supplied with -f. Ditto for a stripped trailing dot. */
3825
3826 if (sender_address != NULL)
3827 {
3828 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3829 {
3830 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3831 "allowed\n", sender_address);
3832 return EXIT_FAILURE;
3833 }
3834 if (f_end_dot && !strip_trailing_dot)
3835 {
3836 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3837 "(trailing dot not allowed)\n", sender_address);
3838 return EXIT_FAILURE;
3839 }
3840 }
3841
3842 /* See if an admin user overrode our logging. */
3843
3844 if (cmdline_syslog_name != NULL)
3845 {
3846 if (admin_user)
3847 {
3848 syslog_processname = cmdline_syslog_name;
3849 log_file_path = string_copy(CUS"syslog");
3850 }
3851 else
3852 {
3853 /* not a panic, non-privileged users should not be able to spam paniclog */
3854 fprintf(stderr,
3855 "exim: you lack sufficient privilege to specify syslog process name\n");
3856 return EXIT_FAILURE;
3857 }
3858 }
3859
3860 /* Paranoia check of maximum lengths of certain strings. There is a check
3861 on the length of the log file path in log.c, which will come into effect
3862 if there are any calls to write the log earlier than this. However, if we
3863 get this far but the string is very long, it is better to stop now than to
3864 carry on and (e.g.) receive a message and then have to collapse. The call to
3865 log_write() from here will cause the ultimate panic collapse if the complete
3866 file name exceeds the buffer length. */
3867
3868 if (Ustrlen(log_file_path) > 200)
3869 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3870 "log_file_path is longer than 200 chars: aborting");
3871
3872 if (Ustrlen(pid_file_path) > 200)
3873 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3874 "pid_file_path is longer than 200 chars: aborting");
3875
3876 if (Ustrlen(spool_directory) > 200)
3877 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3878 "spool_directory is longer than 200 chars: aborting");
3879
3880 /* Length check on the process name given to syslog for its TAG field,
3881 which is only permitted to be 32 characters or less. See RFC 3164. */
3882
3883 if (Ustrlen(syslog_processname) > 32)
3884 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3885 "syslog_processname is longer than 32 chars: aborting");
3886
3887 if (log_oneline)
3888 {
3889 if (admin_user)
3890 {
3891 log_write(0, LOG_MAIN, "%s", log_oneline);
3892 return EXIT_SUCCESS;
3893 }
3894 else
3895 return EXIT_FAILURE;
3896 }
3897
3898 /* In some operating systems, the environment variable TMPDIR controls where
3899 temporary files are created; Exim doesn't use these (apart from when delivering
3900 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3901 If TMPDIR is found in the environment, reset it to the value defined in the
3902 EXIM_TMPDIR macro, if this macro is defined. */
3903
3904 #ifdef EXIM_TMPDIR
3905 {
3906 uschar **p;
3907 for (p = USS environ; *p != NULL; p++)
3908 {
3909 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3910 Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3911 {
3912 uschar *newp = malloc(Ustrlen(EXIM_TMPDIR) + 8);
3913 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3914 *p = newp;
3915 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3916 }
3917 }
3918 }
3919 #endif
3920
3921 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3922 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3923 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3924 called by a user who has set the TZ variable. This then affects the timestamps
3925 in log files and in Received: headers, and any created Date: header lines. The
3926 required timezone is settable in the configuration file, so nothing can be done
3927 about this earlier - but hopefully nothing will normally be logged earlier than
3928 this. We have to make a new environment if TZ is wrong, but don't bother if
3929 timestamps_utc is set, because then all times are in UTC anyway. */
3930
3931 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3932 {
3933 timestamps_utc = TRUE;
3934 }
3935 else
3936 {
3937 uschar *envtz = US getenv("TZ");
3938 if ((envtz == NULL && timezone_string != NULL) ||
3939 (envtz != NULL &&
3940 (timezone_string == NULL ||
3941 Ustrcmp(timezone_string, envtz) != 0)))
3942 {
3943 uschar **p = USS environ;
3944 uschar **new;
3945 uschar **newp;
3946 int count = 0;
3947 while (*p++ != NULL) count++;
3948 if (envtz == NULL) count++;
3949 newp = new = malloc(sizeof(uschar *) * (count + 1));
3950 for (p = USS environ; *p != NULL; p++)
3951 {
3952 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3953 *newp++ = *p;
3954 }
3955 if (timezone_string != NULL)
3956 {
3957 *newp = malloc(Ustrlen(timezone_string) + 4);
3958 sprintf(CS *newp++, "TZ=%s", timezone_string);
3959 }
3960 *newp = NULL;
3961 environ = CSS new;
3962 tzset();
3963 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3964 tod_stamp(tod_log));
3965 }
3966 }
3967
3968 /* Handle the case when we have removed the setuid privilege because of -C or
3969 -D. This means that the caller of Exim was not root.
3970
3971 There is a problem if we were running as the Exim user. The sysadmin may
3972 expect this case to retain privilege because "the binary was called by the
3973 Exim user", but it hasn't, because either the -D option set macros, or the
3974 -C option set a non-trusted configuration file. There are two possibilities:
3975
3976 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3977 to do message deliveries. Thus, the fact that it is running as a
3978 non-privileged user is plausible, and might be wanted in some special
3979 configurations. However, really_exim will have been set false when
3980 privilege was dropped, to stop Exim trying to write to its normal log
3981 files. Therefore, re-enable normal log processing, assuming the sysadmin
3982 has set up the log directory correctly.
3983
3984 (2) If deliver_drop_privilege is not set, the configuration won't work as
3985 apparently intended, and so we log a panic message. In order to retain
3986 root for -C or -D, the caller must either be root or be invoking a
3987 trusted configuration file (when deliver_drop_privilege is false). */
3988
3989 if (removed_privilege && (!trusted_config || macros != NULL) &&
3990 real_uid == exim_uid)
3991 {
3992 if (deliver_drop_privilege)
3993 really_exim = TRUE; /* let logging work normally */
3994 else
3995 log_write(0, LOG_MAIN|LOG_PANIC,
3996 "exim user lost privilege for using %s option",
3997 trusted_config? "-D" : "-C");
3998 }
3999
4000 /* Start up Perl interpreter if Perl support is configured and there is a
4001 perl_startup option, and the configuration or the command line specifies
4002 initializing starting. Note that the global variables are actually called
4003 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4004
4005 #ifdef EXIM_PERL
4006 if (perl_start_option != 0)
4007 opt_perl_at_start = (perl_start_option > 0);
4008 if (opt_perl_at_start && opt_perl_startup != NULL)
4009 {
4010 uschar *errstr;
4011 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4012 errstr = init_perl(opt_perl_startup);
4013 if (errstr != NULL)
4014 {
4015 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
4016 return EXIT_FAILURE;
4017 }
4018 opt_perl_started = TRUE;
4019 }
4020 #endif /* EXIM_PERL */
4021
4022 /* Log the arguments of the call if the configuration file said so. This is
4023 a debugging feature for finding out what arguments certain MUAs actually use.
4024 Don't attempt it if logging is disabled, or if listing variables or if
4025 verifying/testing addresses or expansions. */
4026
4027 if (((debug_selector & D_any) != 0 || LOGGING(arguments))
4028 && really_exim && !list_options && !checking)
4029 {
4030 int i;
4031 uschar *p = big_buffer;
4032 char * dummy;
4033 Ustrcpy(p, "cwd= (failed)");
4034 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
4035 while (*p) p++;
4036 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4037 while (*p) p++;
4038 for (i = 0; i < argc; i++)
4039 {
4040 int len = Ustrlen(argv[i]);
4041 const uschar *printing;
4042 uschar *quote;
4043 if (p + len + 8 >= big_buffer + big_buffer_size)
4044 {
4045 Ustrcpy(p, " ...");
4046 log_write(0, LOG_MAIN, "%s", big_buffer);
4047 Ustrcpy(big_buffer, "...");
4048 p = big_buffer + 3;
4049 }
4050 printing = string_printing(argv[i]);
4051 if (printing[0] == 0) quote = US"\""; else
4052 {
4053 const uschar *pp = printing;
4054 quote = US"";
4055 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4056 }
4057 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4058 (p - big_buffer) - 4), printing, quote);
4059 while (*p) p++;
4060 }
4061
4062 if (LOGGING(arguments))
4063 log_write(0, LOG_MAIN, "%s", big_buffer);
4064 else
4065 debug_printf("%s\n", big_buffer);
4066 }
4067
4068 /* Set the working directory to be the top-level spool directory. We don't rely
4069 on this in the code, which always uses fully qualified names, but it's useful
4070 for core dumps etc. Don't complain if it fails - the spool directory might not
4071 be generally accessible and calls with the -C option (and others) have lost
4072 privilege by now. Before the chdir, we try to ensure that the directory exists.
4073 */
4074
4075 if (Uchdir(spool_directory) != 0)
4076 {
4077 int dummy;
4078 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4079 dummy = /* quieten compiler */ Uchdir(spool_directory);
4080 }
4081
4082 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4083 alias file. Exim doesn't have such a concept, but this call is screwed into
4084 Sun's YP makefiles. Handle this by calling a configured script, as the real
4085 user who called Exim. The -oA option can be used to pass an argument to the
4086 script. */
4087
4088 if (bi_option)
4089 {
4090 (void)fclose(config_file);
4091 if (bi_command != NULL)
4092 {
4093 int i = 0;
4094 uschar *argv[3];
4095 argv[i++] = bi_command;
4096 if (alias_arg != NULL) argv[i++] = alias_arg;
4097 argv[i++] = NULL;
4098
4099 setgroups(group_count, group_list);
4100 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4101
4102 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4103 (argv[1] == NULL)? US"" : argv[1]);
4104
4105 execv(CS argv[0], (char *const *)argv);
4106 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
4107 exit(EXIT_FAILURE);
4108 }
4109 else
4110 {
4111 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4112 exit(EXIT_SUCCESS);
4113 }
4114 }
4115
4116 /* We moved the admin/trusted check to be immediately after reading the
4117 configuration file. We leave these prints here to ensure that syslog setup,
4118 logfile setup, and so on has already happened. */
4119
4120 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4121 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4122
4123 /* Only an admin user may start the daemon or force a queue run in the default
4124 configuration, but the queue run restriction can be relaxed. Only an admin
4125 user may request that a message be returned to its sender forthwith. Only an
4126 admin user may specify a debug level greater than D_v (because it might show
4127 passwords, etc. in lookup queries). Only an admin user may request a queue
4128 count. Only an admin user can use the test interface to scan for email
4129 (because Exim will be in the spool dir and able to look at mails). */
4130
4131 if (!admin_user)
4132 {
4133 BOOL debugset