388743f8dc8a58b31e09ab0aa59ffccb0bf81696
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
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 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
17 #endif
18
19 #ifdef USE_GNUTLS
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22 # define DISABLE_OCSP
23 # endif
24 #endif
25
26 extern void init_lookup_list(void);
27
28
29
30 /*************************************************
31 * Function interface to store functions *
32 *************************************************/
33
34 /* We need some real functions to pass to the PCRE regular expression library
35 for store allocation via Exim's store manager. The normal calls are actually
36 macros that pass over location information to make tracing easier. These
37 functions just interface to the standard macro calls. A good compiler will
38 optimize out the tail recursion and so not make them too expensive. There
39 are two sets of functions; one for use when we want to retain the compiled
40 regular expression for a long time; the other for short-term use. */
41
42 static void *
43 function_store_get(size_t size)
44 {
45 /* For now, regard all RE results as potentially tainted. We might need
46 more intelligence on this point. */
47 return store_get((int)size, TRUE);
48 }
49
50 static void
51 function_dummy_free(void *block) { block = block; }
52
53 static void *
54 function_store_malloc(size_t size)
55 {
56 return store_malloc((int)size);
57 }
58
59 static void
60 function_store_free(void *block)
61 {
62 store_free(block);
63 }
64
65
66
67
68 /*************************************************
69 * Enums for cmdline interface *
70 *************************************************/
71
72 enum commandline_info { CMDINFO_NONE=0,
73 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
74
75
76
77
78 /*************************************************
79 * Compile regular expression and panic on fail *
80 *************************************************/
81
82 /* This function is called when failure to compile a regular expression leads
83 to a panic exit. In other cases, pcre_compile() is called directly. In many
84 cases where this function is used, the results of the compilation are to be
85 placed in long-lived store, so we temporarily reset the store management
86 functions that PCRE uses if the use_malloc flag is set.
87
88 Argument:
89 pattern the pattern to compile
90 caseless TRUE if caseless matching is required
91 use_malloc TRUE if compile into malloc store
92
93 Returns: pointer to the compiled pattern
94 */
95
96 const pcre *
97 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
98 {
99 int offset;
100 int options = PCRE_COPT;
101 const pcre *yield;
102 const uschar *error;
103 if (use_malloc)
104 {
105 pcre_malloc = function_store_malloc;
106 pcre_free = function_store_free;
107 }
108 if (caseless) options |= PCRE_CASELESS;
109 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
110 pcre_malloc = function_store_get;
111 pcre_free = function_dummy_free;
112 if (yield == NULL)
113 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
114 "%s at offset %d while compiling %s", error, offset, pattern);
115 return yield;
116 }
117
118
119
120
121 /*************************************************
122 * Execute regular expression and set strings *
123 *************************************************/
124
125 /* This function runs a regular expression match, and sets up the pointers to
126 the matched substrings.
127
128 Arguments:
129 re the compiled expression
130 subject the subject string
131 options additional PCRE options
132 setup if < 0 do full setup
133 if >= 0 setup from setup+1 onwards,
134 excluding the full matched string
135
136 Returns: TRUE or FALSE
137 */
138
139 BOOL
140 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
141 {
142 int ovector[3*(EXPAND_MAXN+1)];
143 uschar * s = string_copy(subject); /* de-constifying */
144 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
145 PCRE_EOPT | options, ovector, nelem(ovector));
146 BOOL yield = n >= 0;
147 if (n == 0) n = EXPAND_MAXN + 1;
148 if (yield)
149 {
150 expand_nmax = setup < 0 ? 0 : setup + 1;
151 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
152 {
153 expand_nstring[expand_nmax] = s + ovector[nn];
154 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
155 }
156 expand_nmax--;
157 }
158 return yield;
159 }
160
161
162
163
164 /*************************************************
165 * Set up processing details *
166 *************************************************/
167
168 /* Save a text string for dumping when SIGUSR1 is received.
169 Do checks for overruns.
170
171 Arguments: format and arguments, as for printf()
172 Returns: nothing
173 */
174
175 void
176 set_process_info(const char *format, ...)
177 {
178 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
179 gstring * g;
180 int len;
181 va_list ap;
182
183 g = string_fmt_append(&gs, "%5d ", (int)getpid());
184 len = g->ptr;
185 va_start(ap, format);
186 if (!string_vformat(g, 0, format, ap))
187 {
188 gs.ptr = len;
189 g = string_cat(&gs, US"**** string overflowed buffer ****");
190 }
191 g = string_catn(g, US"\n", 1);
192 string_from_gstring(g);
193 process_info_len = g->ptr;
194 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
195 va_end(ap);
196 }
197
198 /***********************************************
199 * Handler for SIGTERM *
200 ***********************************************/
201
202 static void
203 term_handler(int sig)
204 {
205 exit(1);
206 }
207
208
209 /*************************************************
210 * Handler for SIGUSR1 *
211 *************************************************/
212
213 /* SIGUSR1 causes any exim process to write to the process log details of
214 what it is currently doing. It will only be used if the OS is capable of
215 setting up a handler that causes automatic restarting of any system call
216 that is in progress at the time.
217
218 This function takes care to be signal-safe.
219
220 Argument: the signal number (SIGUSR1)
221 Returns: nothing
222 */
223
224 static void
225 usr1_handler(int sig)
226 {
227 int fd;
228
229 os_restarting_signal(sig, usr1_handler);
230
231 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
232 {
233 /* If we are already running as the Exim user, try to create it in the
234 current process (assuming spool_directory exists). Otherwise, if we are
235 root, do the creation in an exim:exim subprocess. */
236
237 int euid = geteuid();
238 if (euid == exim_uid)
239 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
240 else if (euid == root_uid)
241 fd = log_create_as_exim(process_log_path);
242 }
243
244 /* If we are neither exim nor root, or if we failed to create the log file,
245 give up. There is not much useful we can do with errors, since we don't want
246 to disrupt whatever is going on outside the signal handler. */
247
248 if (fd < 0) return;
249
250 (void)write(fd, process_info, process_info_len);
251 (void)close(fd);
252 }
253
254
255
256 /*************************************************
257 * Timeout handler *
258 *************************************************/
259
260 /* This handler is enabled most of the time that Exim is running. The handler
261 doesn't actually get used unless alarm() has been called to set a timer, to
262 place a time limit on a system call of some kind. When the handler is run, it
263 re-enables itself.
264
265 There are some other SIGALRM handlers that are used in special cases when more
266 than just a flag setting is required; for example, when reading a message's
267 input. These are normally set up in the code module that uses them, and the
268 SIGALRM handler is reset to this one afterwards.
269
270 Argument: the signal value (SIGALRM)
271 Returns: nothing
272 */
273
274 void
275 sigalrm_handler(int sig)
276 {
277 sig = sig; /* Keep picky compilers happy */
278 sigalrm_seen = TRUE;
279 os_non_restarting_signal(SIGALRM, sigalrm_handler);
280 }
281
282
283
284 /*************************************************
285 * Sleep for a fractional time interval *
286 *************************************************/
287
288 /* This function is called by millisleep() and exim_wait_tick() to wait for a
289 period of time that may include a fraction of a second. The coding is somewhat
290 tedious. We do not expect setitimer() ever to fail, but if it does, the process
291 will wait for ever, so we panic in this instance. (There was a case of this
292 when a bug in a function that calls milliwait() caused it to pass invalid data.
293 That's when I added the check. :-)
294
295 We assume it to be not worth sleeping for under 100us; this value will
296 require revisiting as hardware advances. This avoids the issue of
297 a zero-valued timer setting meaning "never fire".
298
299 Argument: an itimerval structure containing the interval
300 Returns: nothing
301 */
302
303 static void
304 milliwait(struct itimerval *itval)
305 {
306 sigset_t sigmask;
307 sigset_t old_sigmask;
308
309 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
310 return;
311 (void)sigemptyset(&sigmask); /* Empty mask */
312 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
313 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
314 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
315 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
316 "setitimer() failed: %s", strerror(errno));
317 (void)sigfillset(&sigmask); /* All signals */
318 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
319 (void)sigsuspend(&sigmask); /* Until SIGALRM */
320 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
321 }
322
323
324
325
326 /*************************************************
327 * Millisecond sleep function *
328 *************************************************/
329
330 /* The basic sleep() function has a granularity of 1 second, which is too rough
331 in some cases - for example, when using an increasing delay to slow down
332 spammers.
333
334 Argument: number of millseconds
335 Returns: nothing
336 */
337
338 void
339 millisleep(int msec)
340 {
341 struct itimerval itval;
342 itval.it_interval.tv_sec = 0;
343 itval.it_interval.tv_usec = 0;
344 itval.it_value.tv_sec = msec/1000;
345 itval.it_value.tv_usec = (msec % 1000) * 1000;
346 milliwait(&itval);
347 }
348
349
350
351 /*************************************************
352 * Compare microsecond times *
353 *************************************************/
354
355 /*
356 Arguments:
357 tv1 the first time
358 tv2 the second time
359
360 Returns: -1, 0, or +1
361 */
362
363 static int
364 exim_tvcmp(struct timeval *t1, struct timeval *t2)
365 {
366 if (t1->tv_sec > t2->tv_sec) return +1;
367 if (t1->tv_sec < t2->tv_sec) return -1;
368 if (t1->tv_usec > t2->tv_usec) return +1;
369 if (t1->tv_usec < t2->tv_usec) return -1;
370 return 0;
371 }
372
373
374
375
376 /*************************************************
377 * Clock tick wait function *
378 *************************************************/
379
380 /* Exim uses a time + a pid to generate a unique identifier in two places: its
381 message IDs, and in file names for maildir deliveries. Because some OS now
382 re-use pids within the same second, sub-second times are now being used.
383 However, for absolute certainty, we must ensure the clock has ticked before
384 allowing the relevant process to complete. At the time of implementation of
385 this code (February 2003), the speed of processors is such that the clock will
386 invariably have ticked already by the time a process has done its job. This
387 function prepares for the time when things are faster - and it also copes with
388 clocks that go backwards.
389
390 Arguments:
391 then_tv A timeval which was used to create uniqueness; its usec field
392 has been rounded down to the value of the resolution.
393 We want to be sure the current time is greater than this.
394 resolution The resolution that was used to divide the microseconds
395 (1 for maildir, larger for message ids)
396
397 Returns: nothing
398 */
399
400 void
401 exim_wait_tick(struct timeval *then_tv, int resolution)
402 {
403 struct timeval now_tv;
404 long int now_true_usec;
405
406 (void)gettimeofday(&now_tv, NULL);
407 now_true_usec = now_tv.tv_usec;
408 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
409
410 if (exim_tvcmp(&now_tv, then_tv) <= 0)
411 {
412 struct itimerval itval;
413 itval.it_interval.tv_sec = 0;
414 itval.it_interval.tv_usec = 0;
415 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
416 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
417
418 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
419 negative value for the microseconds is possible only in the case when "now"
420 is more than a second less than "then". That means that itval.it_value.tv_sec
421 is greater than zero. The following correction is therefore safe. */
422
423 if (itval.it_value.tv_usec < 0)
424 {
425 itval.it_value.tv_usec += 1000000;
426 itval.it_value.tv_sec -= 1;
427 }
428
429 DEBUG(D_transport|D_receive)
430 {
431 if (!f.running_in_test_harness)
432 {
433 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
434 then_tv->tv_sec, (long) then_tv->tv_usec,
435 now_tv.tv_sec, (long) now_tv.tv_usec);
436 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
437 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
438 }
439 }
440
441 milliwait(&itval);
442 }
443 }
444
445
446
447
448 /*************************************************
449 * Call fopen() with umask 777 and adjust mode *
450 *************************************************/
451
452 /* Exim runs with umask(0) so that files created with open() have the mode that
453 is specified in the open() call. However, there are some files, typically in
454 the spool directory, that are created with fopen(). They end up world-writeable
455 if no precautions are taken. Although the spool directory is not accessible to
456 the world, this is an untidiness. So this is a wrapper function for fopen()
457 that sorts out the mode of the created file.
458
459 Arguments:
460 filename the file name
461 options the fopen() options
462 mode the required mode
463
464 Returns: the fopened FILE or NULL
465 */
466
467 FILE *
468 modefopen(const uschar *filename, const char *options, mode_t mode)
469 {
470 mode_t saved_umask = umask(0777);
471 FILE *f = Ufopen(filename, options);
472 (void)umask(saved_umask);
473 if (f != NULL) (void)fchmod(fileno(f), mode);
474 return f;
475 }
476
477
478 /*************************************************
479 * Ensure stdin, stdout, and stderr exist *
480 *************************************************/
481
482 /* Some operating systems grumble if an exec() happens without a standard
483 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
484 file will be opened and will use these fd values, and then some other bit of
485 code will assume, for example, that it can write error messages to stderr.
486 This function ensures that fds 0, 1, and 2 are open if they do not already
487 exist, by connecting them to /dev/null.
488
489 This function is also used to ensure that std{in,out,err} exist at all times,
490 so that if any library that Exim calls tries to use them, it doesn't crash.
491
492 Arguments: None
493 Returns: Nothing
494 */
495
496 void
497 exim_nullstd(void)
498 {
499 int devnull = -1;
500 struct stat statbuf;
501 for (int i = 0; i <= 2; i++)
502 {
503 if (fstat(i, &statbuf) < 0 && errno == EBADF)
504 {
505 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
506 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
507 string_open_failed(errno, "/dev/null", NULL));
508 if (devnull != i) (void)dup2(devnull, i);
509 }
510 }
511 if (devnull > 2) (void)close(devnull);
512 }
513
514
515
516
517 /*************************************************
518 * Close unwanted file descriptors for delivery *
519 *************************************************/
520
521 /* This function is called from a new process that has been forked to deliver
522 an incoming message, either directly, or using exec.
523
524 We want any smtp input streams to be closed in this new process. However, it
525 has been observed that using fclose() here causes trouble. When reading in -bS
526 input, duplicate copies of messages have been seen. The files will be sharing a
527 file pointer with the parent process, and it seems that fclose() (at least on
528 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
529 least sometimes. Hence we go for closing the underlying file descriptors.
530
531 If TLS is active, we want to shut down the TLS library, but without molesting
532 the parent's SSL connection.
533
534 For delivery of a non-SMTP message, we want to close stdin and stdout (and
535 stderr unless debugging) because the calling process might have set them up as
536 pipes and be waiting for them to close before it waits for the submission
537 process to terminate. If they aren't closed, they hold up the calling process
538 until the initial delivery process finishes, which is not what we want.
539
540 Exception: We do want it for synchronous delivery!
541
542 And notwithstanding all the above, if D_resolver is set, implying resolver
543 debugging, leave stdout open, because that's where the resolver writes its
544 debugging output.
545
546 When we close stderr (which implies we've also closed stdout), we also get rid
547 of any controlling terminal.
548
549 Arguments: None
550 Returns: Nothing
551 */
552
553 static void
554 close_unwanted(void)
555 {
556 if (smtp_input)
557 {
558 #ifndef DISABLE_TLS
559 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
560 #endif
561 (void)close(fileno(smtp_in));
562 (void)close(fileno(smtp_out));
563 smtp_in = NULL;
564 }
565 else
566 {
567 (void)close(0); /* stdin */
568 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
569 if (debug_selector == 0) /* stderr */
570 {
571 if (!f.synchronous_delivery)
572 {
573 (void)close(2);
574 log_stderr = NULL;
575 }
576 (void)setsid();
577 }
578 }
579 }
580
581
582
583
584 /*************************************************
585 * Set uid and gid *
586 *************************************************/
587
588 /* This function sets a new uid and gid permanently, optionally calling
589 initgroups() to set auxiliary groups. There are some special cases when running
590 Exim in unprivileged modes. In these situations the effective uid will not be
591 root; if we already have the right effective uid/gid, and don't need to
592 initialize any groups, leave things as they are.
593
594 Arguments:
595 uid the uid
596 gid the gid
597 igflag TRUE if initgroups() wanted
598 msg text to use in debugging output and failure log
599
600 Returns: nothing; bombs out on failure
601 */
602
603 void
604 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
605 {
606 uid_t euid = geteuid();
607 gid_t egid = getegid();
608
609 if (euid == root_uid || euid != uid || egid != gid || igflag)
610 {
611 /* At least one OS returns +1 for initgroups failure, so just check for
612 non-zero. */
613
614 if (igflag)
615 {
616 struct passwd *pw = getpwuid(uid);
617 if (!pw)
618 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
619 "no passwd entry for uid=%ld", (long int)uid);
620
621 if (initgroups(pw->pw_name, gid) != 0)
622 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
623 (long int)uid, strerror(errno));
624 }
625
626 if (setgid(gid) < 0 || setuid(uid) < 0)
627 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
628 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
629 }
630
631 /* Debugging output included uid/gid and all groups */
632
633 DEBUG(D_uid)
634 {
635 int group_count, save_errno;
636 gid_t group_list[EXIM_GROUPLIST_SIZE];
637 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
638 (long int)geteuid(), (long int)getegid(), (long int)getpid());
639 group_count = getgroups(nelem(group_list), group_list);
640 save_errno = errno;
641 debug_printf(" auxiliary group list:");
642 if (group_count > 0)
643 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
644 else if (group_count < 0)
645 debug_printf(" <error: %s>", strerror(save_errno));
646 else debug_printf(" <none>");
647 debug_printf("\n");
648 }
649 }
650
651
652
653
654 /*************************************************
655 * Exit point *
656 *************************************************/
657
658 /* Exim exits via this function so that it always clears up any open
659 databases.
660
661 Arguments:
662 rc return code
663
664 Returns: does not return
665 */
666
667 void
668 exim_exit(int rc, const uschar * process)
669 {
670 search_tidyup();
671 store_exit();
672 DEBUG(D_any)
673 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
674 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
675 process ? "(" : "", process, process ? ") " : "", rc);
676 exit(rc);
677 }
678
679
680 void
681 exim_underbar_exit(int rc)
682 {
683 store_exit();
684 _exit(rc);
685 }
686
687
688
689 /* Print error string, then die */
690 static void
691 exim_fail(const char * fmt, ...)
692 {
693 va_list ap;
694 va_start(ap, fmt);
695 vfprintf(stderr, fmt, ap);
696 exit(EXIT_FAILURE);
697 }
698
699 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
700 of chown()/fchown(). See src/functions.h for more explanation */
701 int
702 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
703 {
704 int saved_errno = errno; /* from the preceeding chown call */
705 #if 1
706 log_write(0, LOG_MAIN|LOG_PANIC,
707 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
708 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
709 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
710 #else
711 /* I leave this here, commented, in case the "bug"(?) comes up again.
712 It is not an Exim bug, but we can provide a workaround.
713 See Bug 2391
714 HS 2019-04-18 */
715
716 struct stat buf;
717
718 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
719 {
720 if (buf.st_uid == owner && buf.st_gid == group) return 0;
721 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
722 }
723 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
724
725 #endif
726 errno = saved_errno;
727 return -1;
728 }
729
730
731 /*************************************************
732 * Extract port from host address *
733 *************************************************/
734
735 /* Called to extract the port from the values given to -oMa and -oMi.
736 It also checks the syntax of the address, and terminates it before the
737 port data when a port is extracted.
738
739 Argument:
740 address the address, with possible port on the end
741
742 Returns: the port, or zero if there isn't one
743 bombs out on a syntax error
744 */
745
746 static int
747 check_port(uschar *address)
748 {
749 int port = host_address_extract_port(address);
750 if (string_is_ip_address(address, NULL) == 0)
751 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
752 return port;
753 }
754
755
756
757 /*************************************************
758 * Test/verify an address *
759 *************************************************/
760
761 /* This function is called by the -bv and -bt code. It extracts a working
762 address from a full RFC 822 address. This isn't really necessary per se, but it
763 has the effect of collapsing source routes.
764
765 Arguments:
766 s the address string
767 flags flag bits for verify_address()
768 exit_value to be set for failures
769
770 Returns: nothing
771 */
772
773 static void
774 test_address(uschar *s, int flags, int *exit_value)
775 {
776 int start, end, domain;
777 uschar *parse_error = NULL;
778 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
779 FALSE);
780 if (address == NULL)
781 {
782 fprintf(stdout, "syntax error: %s\n", parse_error);
783 *exit_value = 2;
784 }
785 else
786 {
787 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
788 -1, -1, NULL, NULL, NULL);
789 if (rc == FAIL) *exit_value = 2;
790 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
791 }
792 }
793
794
795
796 /*************************************************
797 * Show supported features *
798 *************************************************/
799
800 static void
801 show_db_version(FILE * f)
802 {
803 #ifdef DB_VERSION_STRING
804 DEBUG(D_any)
805 {
806 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
807 fprintf(f, " Runtime: %s\n",
808 db_version(NULL, NULL, NULL));
809 }
810 else
811 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
812
813 #elif defined(BTREEVERSION) && defined(HASHVERSION)
814 #ifdef USE_DB
815 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
816 #else
817 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
818 #endif
819
820 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
821 fprintf(f, "Probably ndbm\n");
822 #elif defined(USE_TDB)
823 fprintf(f, "Using tdb\n");
824 #else
825 #ifdef USE_GDBM
826 fprintf(f, "Probably GDBM (native mode)\n");
827 #else
828 fprintf(f, "Probably GDBM (compatibility mode)\n");
829 #endif
830 #endif
831 }
832
833
834 /* This function is called for -bV/--version and for -d to output the optional
835 features of the current Exim binary.
836
837 Arguments: a FILE for printing
838 Returns: nothing
839 */
840
841 static void
842 show_whats_supported(FILE * fp)
843 {
844 DEBUG(D_any) {} else show_db_version(fp);
845
846 fprintf(fp, "Support for:");
847 #ifdef SUPPORT_CRYPTEQ
848 fprintf(fp, " crypteq");
849 #endif
850 #if HAVE_ICONV
851 fprintf(fp, " iconv()");
852 #endif
853 #if HAVE_IPV6
854 fprintf(fp, " IPv6");
855 #endif
856 #ifdef HAVE_SETCLASSRESOURCES
857 fprintf(fp, " use_setclassresources");
858 #endif
859 #ifdef SUPPORT_PAM
860 fprintf(fp, " PAM");
861 #endif
862 #ifdef EXIM_PERL
863 fprintf(fp, " Perl");
864 #endif
865 #ifdef EXPAND_DLFUNC
866 fprintf(fp, " Expand_dlfunc");
867 #endif
868 #ifdef USE_TCP_WRAPPERS
869 fprintf(fp, " TCPwrappers");
870 #endif
871 #ifdef USE_GNUTLS
872 fprintf(fp, " GnuTLS");
873 #endif
874 #ifdef USE_OPENSSL
875 fprintf(fp, " OpenSSL");
876 #endif
877 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
878 fprintf(fp, " translate_ip_address");
879 #endif
880 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
881 fprintf(fp, " move_frozen_messages");
882 #endif
883 #ifdef WITH_CONTENT_SCAN
884 fprintf(fp, " Content_Scanning");
885 #endif
886 #ifdef SUPPORT_DANE
887 fprintf(fp, " DANE");
888 #endif
889 #ifndef DISABLE_DKIM
890 fprintf(fp, " DKIM");
891 #endif
892 #ifndef DISABLE_DNSSEC
893 fprintf(fp, " DNSSEC");
894 #endif
895 #ifndef DISABLE_EVENT
896 fprintf(fp, " Event");
897 #endif
898 #ifdef SUPPORT_I18N
899 fprintf(fp, " I18N");
900 #endif
901 #ifndef DISABLE_OCSP
902 fprintf(fp, " OCSP");
903 #endif
904 #ifdef SUPPORT_PIPE_CONNECT
905 fprintf(fp, " PIPE_CONNECT");
906 #endif
907 #ifndef DISABLE_PRDR
908 fprintf(fp, " PRDR");
909 #endif
910 #ifdef SUPPORT_PROXY
911 fprintf(fp, " PROXY");
912 #endif
913 #ifdef SUPPORT_SOCKS
914 fprintf(fp, " SOCKS");
915 #endif
916 #ifdef SUPPORT_SPF
917 fprintf(fp, " SPF");
918 #endif
919 #ifdef SUPPORT_DMARC
920 fprintf(fp, " DMARC");
921 #endif
922 #ifdef TCP_FASTOPEN
923 deliver_init();
924 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
925 #endif
926 #ifdef EXPERIMENTAL_LMDB
927 fprintf(fp, " Experimental_LMDB");
928 #endif
929 #ifdef EXPERIMENTAL_QUEUEFILE
930 fprintf(fp, " Experimental_QUEUEFILE");
931 #endif
932 #ifdef EXPERIMENTAL_SRS
933 fprintf(fp, " Experimental_SRS");
934 #endif
935 #ifdef EXPERIMENTAL_ARC
936 fprintf(fp, " Experimental_ARC");
937 #endif
938 #ifdef EXPERIMENTAL_BRIGHTMAIL
939 fprintf(fp, " Experimental_Brightmail");
940 #endif
941 #ifdef EXPERIMENTAL_DCC
942 fprintf(fp, " Experimental_DCC");
943 #endif
944 #ifdef EXPERIMENTAL_DSN_INFO
945 fprintf(fp, " Experimental_DSN_info");
946 #endif
947 #ifdef EXPERIMENTAL_TLS_RESUME
948 fprintf(fp, " Experimental_TLS_resume");
949 #endif
950 fprintf(fp, "\n");
951
952 fprintf(fp, "Lookups (built-in):");
953 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
954 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
955 #endif
956 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
957 fprintf(fp, " cdb");
958 #endif
959 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
960 fprintf(fp, " dbm dbmjz dbmnz");
961 #endif
962 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
963 fprintf(fp, " dnsdb");
964 #endif
965 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
966 fprintf(fp, " dsearch");
967 #endif
968 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
969 fprintf(fp, " ibase");
970 #endif
971 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
972 fprintf(fp, " json");
973 #endif
974 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
975 fprintf(fp, " ldap ldapdn ldapm");
976 #endif
977 #ifdef EXPERIMENTAL_LMDB
978 fprintf(fp, " lmdb");
979 #endif
980 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
981 fprintf(fp, " mysql");
982 #endif
983 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
984 fprintf(fp, " nis nis0");
985 #endif
986 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
987 fprintf(fp, " nisplus");
988 #endif
989 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
990 fprintf(fp, " oracle");
991 #endif
992 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
993 fprintf(fp, " passwd");
994 #endif
995 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
996 fprintf(fp, " pgsql");
997 #endif
998 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
999 fprintf(fp, " redis");
1000 #endif
1001 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1002 fprintf(fp, " sqlite");
1003 #endif
1004 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1005 fprintf(fp, " testdb");
1006 #endif
1007 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1008 fprintf(fp, " whoson");
1009 #endif
1010 fprintf(fp, "\n");
1011
1012 auth_show_supported(fp);
1013 route_show_supported(fp);
1014 transport_show_supported(fp);
1015
1016 #ifdef WITH_CONTENT_SCAN
1017 malware_show_supported(fp);
1018 #endif
1019
1020 if (fixed_never_users[0] > 0)
1021 {
1022 int i;
1023 fprintf(fp, "Fixed never_users: ");
1024 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1025 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1026 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1027 }
1028
1029 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1030
1031 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1032
1033 /* Everything else is details which are only worth reporting when debugging.
1034 Perhaps the tls_version_report should move into this too. */
1035 DEBUG(D_any) do {
1036
1037 /* clang defines __GNUC__ (at least, for me) so test for it first */
1038 #if defined(__clang__)
1039 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1040 #elif defined(__GNUC__)
1041 fprintf(fp, "Compiler: GCC [%s]\n",
1042 # ifdef __VERSION__
1043 __VERSION__
1044 # else
1045 "? unknown version ?"
1046 # endif
1047 );
1048 #else
1049 fprintf(fp, "Compiler: <unknown>\n");
1050 #endif
1051
1052 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1053 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1054 __GLIBC__, __GLIBC_MINOR__);
1055 if (__GLIBC_PREREQ(2, 1))
1056 fprintf(fp, " Runtime: %s\n",
1057 gnu_get_libc_version());
1058 #endif
1059
1060 show_db_version(fp);
1061
1062 #ifndef DISABLE_TLS
1063 tls_version_report(fp);
1064 #endif
1065 #ifdef SUPPORT_I18N
1066 utf8_version_report(fp);
1067 #endif
1068
1069 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1070 if (authi->version_report)
1071 (*authi->version_report)(fp);
1072
1073 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1074 characters; unless it's an ancient version of PCRE in which case it
1075 is not defined. */
1076 #ifndef PCRE_PRERELEASE
1077 # define PCRE_PRERELEASE
1078 #endif
1079 #define QUOTE(X) #X
1080 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1081 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1082 " Runtime: %s\n",
1083 PCRE_MAJOR, PCRE_MINOR,
1084 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1085 pcre_version());
1086 #undef QUOTE
1087 #undef EXPAND_AND_QUOTE
1088
1089 init_lookup_list();
1090 for (int i = 0; i < lookup_list_count; i++)
1091 if (lookup_list[i]->version_report)
1092 lookup_list[i]->version_report(fp);
1093
1094 #ifdef WHITELIST_D_MACROS
1095 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1096 #else
1097 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1098 #endif
1099 #ifdef TRUSTED_CONFIG_LIST
1100 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1101 #else
1102 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1103 #endif
1104
1105 } while (0);
1106 }
1107
1108
1109 /*************************************************
1110 * Show auxiliary information about Exim *
1111 *************************************************/
1112
1113 static void
1114 show_exim_information(enum commandline_info request, FILE *stream)
1115 {
1116 switch(request)
1117 {
1118 case CMDINFO_NONE:
1119 fprintf(stream, "Oops, something went wrong.\n");
1120 return;
1121 case CMDINFO_HELP:
1122 fprintf(stream,
1123 "The -bI: flag takes a string indicating which information to provide.\n"
1124 "If the string is not recognised, you'll get this help (on stderr).\n"
1125 "\n"
1126 " exim -bI:help this information\n"
1127 " exim -bI:dscp list of known dscp value keywords\n"
1128 " exim -bI:sieve list of supported sieve extensions\n"
1129 );
1130 return;
1131 case CMDINFO_SIEVE:
1132 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1133 fprintf(stream, "%s\n", *pp);
1134 return;
1135 case CMDINFO_DSCP:
1136 dscp_list_to_stream(stream);
1137 return;
1138 }
1139 }
1140
1141
1142 /*************************************************
1143 * Quote a local part *
1144 *************************************************/
1145
1146 /* This function is used when a sender address or a From: or Sender: header
1147 line is being created from the caller's login, or from an authenticated_id. It
1148 applies appropriate quoting rules for a local part.
1149
1150 Argument: the local part
1151 Returns: the local part, quoted if necessary
1152 */
1153
1154 uschar *
1155 local_part_quote(uschar *lpart)
1156 {
1157 BOOL needs_quote = FALSE;
1158 gstring * g;
1159
1160 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1161 {
1162 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1163 (*t != '.' || t == lpart || t[1] == 0);
1164 }
1165
1166 if (!needs_quote) return lpart;
1167
1168 g = string_catn(NULL, US"\"", 1);
1169
1170 for (;;)
1171 {
1172 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1173 if (nq == NULL)
1174 {
1175 g = string_cat(g, lpart);
1176 break;
1177 }
1178 g = string_catn(g, lpart, nq - lpart);
1179 g = string_catn(g, US"\\", 1);
1180 g = string_catn(g, nq, 1);
1181 lpart = nq + 1;
1182 }
1183
1184 g = string_catn(g, US"\"", 1);
1185 return string_from_gstring(g);
1186 }
1187
1188
1189
1190 #ifdef USE_READLINE
1191 /*************************************************
1192 * Load readline() functions *
1193 *************************************************/
1194
1195 /* This function is called from testing executions that read data from stdin,
1196 but only when running as the calling user. Currently, only -be does this. The
1197 function loads the readline() function library and passes back the functions.
1198 On some systems, it needs the curses library, so load that too, but try without
1199 it if loading fails. All this functionality has to be requested at build time.
1200
1201 Arguments:
1202 fn_readline_ptr pointer to where to put the readline pointer
1203 fn_addhist_ptr pointer to where to put the addhistory function
1204
1205 Returns: the dlopen handle or NULL on failure
1206 */
1207
1208 static void *
1209 set_readline(char * (**fn_readline_ptr)(const char *),
1210 void (**fn_addhist_ptr)(const char *))
1211 {
1212 void *dlhandle;
1213 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1214
1215 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1216 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1217
1218 if (dlhandle != NULL)
1219 {
1220 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1221 * char * readline (const char *prompt);
1222 * void add_history (const char *string);
1223 */
1224 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1225 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1226 }
1227 else
1228 {
1229 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1230 }
1231
1232 return dlhandle;
1233 }
1234 #endif
1235
1236
1237
1238 /*************************************************
1239 * Get a line from stdin for testing things *
1240 *************************************************/
1241
1242 /* This function is called when running tests that can take a number of lines
1243 of input (for example, -be and -bt). It handles continuations and trailing
1244 spaces. And prompting and a blank line output on eof. If readline() is in use,
1245 the arguments are non-NULL and provide the relevant functions.
1246
1247 Arguments:
1248 fn_readline readline function or NULL
1249 fn_addhist addhist function or NULL
1250
1251 Returns: pointer to dynamic memory, or NULL at end of file
1252 */
1253
1254 static uschar *
1255 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1256 {
1257 gstring * g = NULL;
1258
1259 if (!fn_readline) { printf("> "); fflush(stdout); }
1260
1261 for (int i = 0;; i++)
1262 {
1263 uschar buffer[1024];
1264 uschar *p, *ss;
1265
1266 #ifdef USE_READLINE
1267 char *readline_line = NULL;
1268 if (fn_readline)
1269 {
1270 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1271 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1272 p = US readline_line;
1273 }
1274 else
1275 #endif
1276
1277 /* readline() not in use */
1278
1279 {
1280 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1281 p = buffer;
1282 }
1283
1284 /* Handle the line */
1285
1286 ss = p + (int)Ustrlen(p);
1287 while (ss > p && isspace(ss[-1])) ss--;
1288
1289 if (i > 0)
1290 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1291
1292 g = string_catn(g, p, ss - p);
1293
1294 #ifdef USE_READLINE
1295 if (fn_readline) free(readline_line);
1296 #endif
1297
1298 /* g can only be NULL if ss==p */
1299 if (ss == p || g->s[g->ptr-1] != '\\')
1300 break;
1301
1302 --g->ptr;
1303 (void) string_from_gstring(g);
1304 }
1305
1306 if (!g) printf("\n");
1307 return string_from_gstring(g);
1308 }
1309
1310
1311
1312 /*************************************************
1313 * Output usage information for the program *
1314 *************************************************/
1315
1316 /* This function is called when there are no recipients
1317 or a specific --help argument was added.
1318
1319 Arguments:
1320 progname information on what name we were called by
1321
1322 Returns: DOES NOT RETURN
1323 */
1324
1325 static void
1326 exim_usage(uschar *progname)
1327 {
1328
1329 /* Handle specific program invocation variants */
1330 if (Ustrcmp(progname, US"-mailq") == 0)
1331 exim_fail(
1332 "mailq - list the contents of the mail queue\n\n"
1333 "For a list of options, see the Exim documentation.\n");
1334
1335 /* Generic usage - we output this whatever happens */
1336 exim_fail(
1337 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1338 "not directly from a shell command line. Options and/or arguments control\n"
1339 "what it does when called. For a list of options, see the Exim documentation.\n");
1340 }
1341
1342
1343
1344 /*************************************************
1345 * Validate that the macros given are okay *
1346 *************************************************/
1347
1348 /* Typically, Exim will drop privileges if macros are supplied. In some
1349 cases, we want to not do so.
1350
1351 Arguments: opt_D_used - true if the commandline had a "-D" option
1352 Returns: true if trusted, false otherwise
1353 */
1354
1355 static BOOL
1356 macros_trusted(BOOL opt_D_used)
1357 {
1358 #ifdef WHITELIST_D_MACROS
1359 uschar *whitelisted, *end, *p, **whites;
1360 int white_count, i, n;
1361 size_t len;
1362 BOOL prev_char_item, found;
1363 #endif
1364
1365 if (!opt_D_used)
1366 return TRUE;
1367 #ifndef WHITELIST_D_MACROS
1368 return FALSE;
1369 #else
1370
1371 /* We only trust -D overrides for some invoking users:
1372 root, the exim run-time user, the optional config owner user.
1373 I don't know why config-owner would be needed, but since they can own the
1374 config files anyway, there's no security risk to letting them override -D. */
1375 if ( ! ((real_uid == root_uid)
1376 || (real_uid == exim_uid)
1377 #ifdef CONFIGURE_OWNER
1378 || (real_uid == config_uid)
1379 #endif
1380 ))
1381 {
1382 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1383 return FALSE;
1384 }
1385
1386 /* Get a list of macros which are whitelisted */
1387 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1388 prev_char_item = FALSE;
1389 white_count = 0;
1390 for (p = whitelisted; *p != '\0'; ++p)
1391 {
1392 if (*p == ':' || isspace(*p))
1393 {
1394 *p = '\0';
1395 if (prev_char_item)
1396 ++white_count;
1397 prev_char_item = FALSE;
1398 continue;
1399 }
1400 if (!prev_char_item)
1401 prev_char_item = TRUE;
1402 }
1403 end = p;
1404 if (prev_char_item)
1405 ++white_count;
1406 if (!white_count)
1407 return FALSE;
1408 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1409 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1410 {
1411 if (*p != '\0')
1412 {
1413 whites[i++] = p;
1414 if (i == white_count)
1415 break;
1416 while (*p != '\0' && p < end)
1417 ++p;
1418 }
1419 }
1420 whites[i] = NULL;
1421
1422 /* The list of commandline macros should be very short.
1423 Accept the N*M complexity. */
1424 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1425 {
1426 found = FALSE;
1427 for (uschar ** w = whites; *w; ++w)
1428 if (Ustrcmp(*w, m->name) == 0)
1429 {
1430 found = TRUE;
1431 break;
1432 }
1433 if (!found)
1434 return FALSE;
1435 if (!m->replacement)
1436 continue;
1437 if ((len = m->replen) == 0)
1438 continue;
1439 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1440 0, PCRE_EOPT, NULL, 0);
1441 if (n < 0)
1442 {
1443 if (n != PCRE_ERROR_NOMATCH)
1444 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1445 return FALSE;
1446 }
1447 }
1448 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1449 return TRUE;
1450 #endif
1451 }
1452
1453
1454 /*************************************************
1455 * Expansion testing *
1456 *************************************************/
1457
1458 /* Expand and print one item, doing macro-processing.
1459
1460 Arguments:
1461 item line for expansion
1462 */
1463
1464 static void
1465 expansion_test_line(uschar * line)
1466 {
1467 int len;
1468 BOOL dummy_macexp;
1469
1470 Ustrncpy(big_buffer, line, big_buffer_size);
1471 big_buffer[big_buffer_size-1] = '\0';
1472 len = Ustrlen(big_buffer);
1473
1474 (void) macros_expand(0, &len, &dummy_macexp);
1475
1476 if (isupper(big_buffer[0]))
1477 {
1478 if (macro_read_assignment(big_buffer))
1479 printf("Defined macro '%s'\n", mlast->name);
1480 }
1481 else
1482 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1483 else printf("Failed: %s\n", expand_string_message);
1484 }
1485
1486
1487
1488 /*************************************************
1489 * Entry point and high-level code *
1490 *************************************************/
1491
1492 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1493 the appropriate action. All the necessary functions are present in the one
1494 binary. I originally thought one should split it up, but it turns out that so
1495 much of the apparatus is needed in each chunk that one might as well just have
1496 it all available all the time, which then makes the coding easier as well.
1497
1498 Arguments:
1499 argc count of entries in argv
1500 argv argument strings, with argv[0] being the program name
1501
1502 Returns: EXIT_SUCCESS if terminated successfully
1503 EXIT_FAILURE otherwise, except when a message has been sent
1504 to the sender, and -oee was given
1505 */
1506
1507 int
1508 main(int argc, char **cargv)
1509 {
1510 uschar **argv = USS cargv;
1511 int arg_receive_timeout = -1;
1512 int arg_smtp_receive_timeout = -1;
1513 int arg_error_handling = error_handling;
1514 int filter_sfd = -1;
1515 int filter_ufd = -1;
1516 int group_count;
1517 int i, rv;
1518 int list_queue_option = 0;
1519 int msg_action = 0;
1520 int msg_action_arg = -1;
1521 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1522 int queue_only_reason = 0;
1523 #ifdef EXIM_PERL
1524 int perl_start_option = 0;
1525 #endif
1526 int recipients_arg = argc;
1527 int sender_address_domain = 0;
1528 int test_retry_arg = -1;
1529 int test_rewrite_arg = -1;
1530 gid_t original_egid;
1531 BOOL arg_queue_only = FALSE;
1532 BOOL bi_option = FALSE;
1533 BOOL checking = FALSE;
1534 BOOL count_queue = FALSE;
1535 BOOL expansion_test = FALSE;
1536 BOOL extract_recipients = FALSE;
1537 BOOL flag_G = FALSE;
1538 BOOL flag_n = FALSE;
1539 BOOL forced_delivery = FALSE;
1540 BOOL f_end_dot = FALSE;
1541 BOOL deliver_give_up = FALSE;
1542 BOOL list_queue = FALSE;
1543 BOOL list_options = FALSE;
1544 BOOL list_config = FALSE;
1545 BOOL local_queue_only;
1546 BOOL more = TRUE;
1547 BOOL one_msg_action = FALSE;
1548 BOOL opt_D_used = FALSE;
1549 BOOL queue_only_set = FALSE;
1550 BOOL receiving_message = TRUE;
1551 BOOL sender_ident_set = FALSE;
1552 BOOL session_local_queue_only;
1553 BOOL unprivileged;
1554 BOOL removed_privilege = FALSE;
1555 BOOL usage_wanted = FALSE;
1556 BOOL verify_address_mode = FALSE;
1557 BOOL verify_as_sender = FALSE;
1558 BOOL version_printed = FALSE;
1559 uschar *alias_arg = NULL;
1560 uschar *called_as = US"";
1561 uschar *cmdline_syslog_name = NULL;
1562 uschar *start_queue_run_id = NULL;
1563 uschar *stop_queue_run_id = NULL;
1564 uschar *expansion_test_message = NULL;
1565 uschar *ftest_domain = NULL;
1566 uschar *ftest_localpart = NULL;
1567 uschar *ftest_prefix = NULL;
1568 uschar *ftest_suffix = NULL;
1569 uschar *log_oneline = NULL;
1570 uschar *malware_test_file = NULL;
1571 uschar *real_sender_address;
1572 uschar *originator_home = US"/";
1573 size_t sz;
1574 rmark reset_point;
1575
1576 struct passwd *pw;
1577 struct stat statbuf;
1578 pid_t passed_qr_pid = (pid_t)0;
1579 int passed_qr_pipe = -1;
1580 gid_t group_list[EXIM_GROUPLIST_SIZE];
1581
1582 /* For the -bI: flag */
1583 enum commandline_info info_flag = CMDINFO_NONE;
1584 BOOL info_stdout = FALSE;
1585
1586 /* Possible options for -R and -S */
1587
1588 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1589
1590 /* Need to define this in case we need to change the environment in order
1591 to get rid of a bogus time zone. We have to make it char rather than uschar
1592 because some OS define it in /usr/include/unistd.h. */
1593
1594 extern char **environ;
1595
1596 /* If the Exim user and/or group and/or the configuration file owner/group were
1597 defined by ref:name at build time, we must now find the actual uid/gid values.
1598 This is a feature to make the lives of binary distributors easier. */
1599
1600 #ifdef EXIM_USERNAME
1601 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1602 {
1603 if (exim_uid == 0)
1604 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1605
1606 /* If ref:name uses a number as the name, route_finduser() returns
1607 TRUE with exim_uid set and pw coerced to NULL. */
1608 if (pw)
1609 exim_gid = pw->pw_gid;
1610 #ifndef EXIM_GROUPNAME
1611 else
1612 exim_fail(
1613 "exim: ref:name should specify a usercode, not a group.\n"
1614 "exim: can't let you get away with it unless you also specify a group.\n");
1615 #endif
1616 }
1617 else
1618 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1619 #endif
1620
1621 #ifdef EXIM_GROUPNAME
1622 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1623 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1624 #endif
1625
1626 #ifdef CONFIGURE_OWNERNAME
1627 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1628 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1629 CONFIGURE_OWNERNAME);
1630 #endif
1631
1632 /* We default the system_filter_user to be the Exim run-time user, as a
1633 sane non-root value. */
1634 system_filter_uid = exim_uid;
1635
1636 #ifdef CONFIGURE_GROUPNAME
1637 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1638 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1639 CONFIGURE_GROUPNAME);
1640 #endif
1641
1642 /* In the Cygwin environment, some initialization used to need doing.
1643 It was fudged in by means of this macro; now no longer but we'll leave
1644 it in case of others. */
1645
1646 #ifdef OS_INIT
1647 OS_INIT
1648 #endif
1649
1650 /* Check a field which is patched when we are running Exim within its
1651 testing harness; do a fast initial check, and then the whole thing. */
1652
1653 f.running_in_test_harness =
1654 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1655 if (f.running_in_test_harness)
1656 debug_store = TRUE;
1657
1658 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1659 at the start of a program; however, it seems that some environments do not
1660 follow this. A "strange" locale can affect the formatting of timestamps, so we
1661 make quite sure. */
1662
1663 setlocale(LC_ALL, "C");
1664
1665 /* Set up the default handler for timing using alarm(). */
1666
1667 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1668
1669 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1670 because store_malloc writes a log entry on failure. */
1671
1672 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1673 exim_fail("exim: failed to get store for log buffer\n");
1674
1675 /* Initialize the default log options. */
1676
1677 bits_set(log_selector, log_selector_size, log_default);
1678
1679 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1680 NULL when the daemon is run and the file is closed. We have to use this
1681 indirection, because some systems don't allow writing to the variable "stderr".
1682 */
1683
1684 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1685
1686 /* Arrange for the PCRE regex library to use our store functions. Note that
1687 the normal calls are actually macros that add additional arguments for
1688 debugging purposes so we have to assign specially constructed functions here.
1689 The default is to use store in the stacking pool, but this is overridden in the
1690 regex_must_compile() function. */
1691
1692 pcre_malloc = function_store_get;
1693 pcre_free = function_dummy_free;
1694
1695 /* Ensure there is a big buffer for temporary use in several places. It is put
1696 in malloc store so that it can be freed for enlargement if necessary. */
1697
1698 big_buffer = store_malloc(big_buffer_size);
1699
1700 /* Set up the handler for the data request signal, and set the initial
1701 descriptive text. */
1702
1703 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1704 set_process_info("initializing");
1705 os_restarting_signal(SIGUSR1, usr1_handler);
1706
1707 /* If running in a dockerized environment, the TERM signal is only
1708 delegated to the PID 1 if we request it by setting an signal handler */
1709 if (getpid() == 1) signal(SIGTERM, term_handler);
1710
1711 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1712 in the daemon code. For the rest of Exim's uses, we ignore it. */
1713
1714 signal(SIGHUP, SIG_IGN);
1715
1716 /* We don't want to die on pipe errors as the code is written to handle
1717 the write error instead. */
1718
1719 signal(SIGPIPE, SIG_IGN);
1720
1721 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1722 set to SIG_IGN. This causes subprocesses that complete before the parent
1723 process waits for them not to hang around, so when Exim calls wait(), nothing
1724 is there. The wait() code has been made robust against this, but let's ensure
1725 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1726 ending status. We use sigaction rather than plain signal() on those OS where
1727 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1728 problem on AIX with this.) */
1729
1730 #ifdef SA_NOCLDWAIT
1731 {
1732 struct sigaction act;
1733 act.sa_handler = SIG_DFL;
1734 sigemptyset(&(act.sa_mask));
1735 act.sa_flags = 0;
1736 sigaction(SIGCHLD, &act, NULL);
1737 }
1738 #else
1739 signal(SIGCHLD, SIG_DFL);
1740 #endif
1741
1742 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1743 SIGHUP. */
1744
1745 sighup_argv = argv;
1746
1747 /* Set up the version number. Set up the leading 'E' for the external form of
1748 message ids, set the pointer to the internal form, and initialize it to
1749 indicate no message being processed. */
1750
1751 version_init();
1752 message_id_option[0] = '-';
1753 message_id_external = message_id_option + 1;
1754 message_id_external[0] = 'E';
1755 message_id = message_id_external + 1;
1756 message_id[0] = 0;
1757
1758 /* Set the umask to zero so that any files Exim creates using open() are
1759 created with the modes that it specifies. NOTE: Files created with fopen() have
1760 a problem, which was not recognized till rather late (February 2006). With this
1761 umask, such files will be world writeable. (They are all content scanning files
1762 in the spool directory, which isn't world-accessible, so this is not a
1763 disaster, but it's untidy.) I don't want to change this overall setting,
1764 however, because it will interact badly with the open() calls. Instead, there's
1765 now a function called modefopen() that fiddles with the umask while calling
1766 fopen(). */
1767
1768 (void)umask(0);
1769
1770 /* Precompile the regular expression for matching a message id. Keep this in
1771 step with the code that generates ids in the accept.c module. We need to do
1772 this here, because the -M options check their arguments for syntactic validity
1773 using mac_ismsgid, which uses this. */
1774
1775 regex_ismsgid =
1776 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1777
1778 /* Precompile the regular expression that is used for matching an SMTP error
1779 code, possibly extended, at the start of an error message. Note that the
1780 terminating whitespace character is included. */
1781
1782 regex_smtp_code =
1783 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1784 FALSE, TRUE);
1785
1786 #ifdef WHITELIST_D_MACROS
1787 /* Precompile the regular expression used to filter the content of macros
1788 given to -D for permissibility. */
1789
1790 regex_whitelisted_macro =
1791 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1792 #endif
1793
1794 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1795
1796 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1797 this seems to be a generally accepted convention, since one finds symbolic
1798 links called "mailq" in standard OS configurations. */
1799
1800 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1801 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1802 {
1803 list_queue = TRUE;
1804 receiving_message = FALSE;
1805 called_as = US"-mailq";
1806 }
1807
1808 /* If the program is called as "rmail" treat it as equivalent to
1809 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1810 i.e. preventing a single dot on a line from terminating the message, and
1811 returning with zero return code, even in cases of error (provided an error
1812 message has been sent). */
1813
1814 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1815 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1816 {
1817 f.dot_ends = FALSE;
1818 called_as = US"-rmail";
1819 errors_sender_rc = EXIT_SUCCESS;
1820 }
1821
1822 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1823 this is a smail convention. */
1824
1825 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1826 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1827 {
1828 smtp_input = smtp_batched_input = TRUE;
1829 called_as = US"-rsmtp";
1830 }
1831
1832 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1833 this is a smail convention. */
1834
1835 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1836 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1837 {
1838 queue_interval = 0;
1839 receiving_message = FALSE;
1840 called_as = US"-runq";
1841 }
1842
1843 /* If the program is called as "newaliases" treat it as equivalent to
1844 "exim -bi"; this is a sendmail convention. */
1845
1846 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1847 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1848 {
1849 bi_option = TRUE;
1850 receiving_message = FALSE;
1851 called_as = US"-newaliases";
1852 }
1853
1854 /* Save the original effective uid for a couple of uses later. It should
1855 normally be root, but in some esoteric environments it may not be. */
1856
1857 original_euid = geteuid();
1858 original_egid = getegid();
1859
1860 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1861 to be the same as the real ones. This makes a difference only if Exim is setuid
1862 (or setgid) to something other than root, which could be the case in some
1863 special configurations. */
1864
1865 real_uid = getuid();
1866 real_gid = getgid();
1867
1868 if (real_uid == root_uid)
1869 {
1870 if ((rv = setgid(real_gid)))
1871 exim_fail("exim: setgid(%ld) failed: %s\n",
1872 (long int)real_gid, strerror(errno));
1873 if ((rv = setuid(real_uid)))
1874 exim_fail("exim: setuid(%ld) failed: %s\n",
1875 (long int)real_uid, strerror(errno));
1876 }
1877
1878 /* If neither the original real uid nor the original euid was root, Exim is
1879 running in an unprivileged state. */
1880
1881 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1882
1883 /* Scan the program's arguments. Some can be dealt with right away; others are
1884 simply recorded for checking and handling afterwards. Do a high-level switch
1885 on the second character (the one after '-'), to save some effort. */
1886
1887 for (i = 1; i < argc; i++)
1888 {
1889 BOOL badarg = FALSE;
1890 uschar *arg = argv[i];
1891 uschar *argrest;
1892 int switchchar;
1893
1894 /* An argument not starting with '-' is the start of a recipients list;
1895 break out of the options-scanning loop. */
1896
1897 if (arg[0] != '-')
1898 {
1899 recipients_arg = i;
1900 break;
1901 }
1902
1903 /* An option consisting of -- terminates the options */
1904
1905 if (Ustrcmp(arg, "--") == 0)
1906 {
1907 recipients_arg = i + 1;
1908 break;
1909 }
1910
1911 /* Handle flagged options */
1912
1913 switchchar = arg[1];
1914 argrest = arg+2;
1915
1916 /* Make all -ex options synonymous with -oex arguments, since that
1917 is assumed by various callers. Also make -qR options synonymous with -R
1918 options, as that seems to be required as well. Allow for -qqR too, and
1919 the same for -S options. */
1920
1921 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1922 Ustrncmp(arg+1, "qR", 2) == 0 ||
1923 Ustrncmp(arg+1, "qS", 2) == 0)
1924 {
1925 switchchar = arg[2];
1926 argrest++;
1927 }
1928 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1929 {
1930 switchchar = arg[3];
1931 argrest += 2;
1932 f.queue_2stage = TRUE;
1933 }
1934
1935 /* Make -r synonymous with -f, since it is a documented alias */
1936
1937 else if (arg[1] == 'r') switchchar = 'f';
1938
1939 /* Make -ov synonymous with -v */
1940
1941 else if (Ustrcmp(arg, "-ov") == 0)
1942 {
1943 switchchar = 'v';
1944 argrest++;
1945 }
1946
1947 /* deal with --option_aliases */
1948 else if (switchchar == '-')
1949 {
1950 if (Ustrcmp(argrest, "help") == 0)
1951 {
1952 usage_wanted = TRUE;
1953 break;
1954 }
1955 else if (Ustrcmp(argrest, "version") == 0)
1956 {
1957 switchchar = 'b';
1958 argrest = US"V";
1959 }
1960 }
1961
1962 /* High-level switch on active initial letter */
1963
1964 switch(switchchar)
1965 {
1966
1967 /* sendmail uses -Ac and -Am to control which .cf file is used;
1968 we ignore them. */
1969 case 'A':
1970 if (*argrest == '\0') { badarg = TRUE; break; }
1971 else
1972 {
1973 BOOL ignore = FALSE;
1974 switch (*argrest)
1975 {
1976 case 'c':
1977 case 'm':
1978 if (*(argrest + 1) == '\0')
1979 ignore = TRUE;
1980 break;
1981 }
1982 if (!ignore) { badarg = TRUE; break; }
1983 }
1984 break;
1985
1986 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1987 so has no need of it. */
1988
1989 case 'B':
1990 if (*argrest == 0) i++; /* Skip over the type */
1991 break;
1992
1993
1994 case 'b':
1995 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1996
1997 /* -bd: Run in daemon mode, awaiting SMTP connections.
1998 -bdf: Ditto, but in the foreground.
1999 */
2000
2001 if (*argrest == 'd')
2002 {
2003 f.daemon_listen = TRUE;
2004 if (*(++argrest) == 'f') f.background_daemon = FALSE;
2005 else if (*argrest != 0) { badarg = TRUE; break; }
2006 }
2007
2008 /* -be: Run in expansion test mode
2009 -bem: Ditto, but read a message from a file first
2010 */
2011
2012 else if (*argrest == 'e')
2013 {
2014 expansion_test = checking = TRUE;
2015 if (argrest[1] == 'm')
2016 {
2017 if (++i >= argc) { badarg = TRUE; break; }
2018 expansion_test_message = argv[i];
2019 argrest++;
2020 }
2021 if (argrest[1] != 0) { badarg = TRUE; break; }
2022 }
2023
2024 /* -bF: Run system filter test */
2025
2026 else if (*argrest == 'F')
2027 {
2028 filter_test |= checking = FTEST_SYSTEM;
2029 if (*(++argrest) != 0) { badarg = TRUE; break; }
2030 if (++i < argc) filter_test_sfile = argv[i]; else
2031 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2032 }
2033
2034 /* -bf: Run user filter test
2035 -bfd: Set domain for filter testing
2036 -bfl: Set local part for filter testing
2037 -bfp: Set prefix for filter testing
2038 -bfs: Set suffix for filter testing
2039 */
2040
2041 else if (*argrest == 'f')
2042 {
2043 if (*(++argrest) == 0)
2044 {
2045 filter_test |= checking = FTEST_USER;
2046 if (++i < argc) filter_test_ufile = argv[i]; else
2047 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2048 }
2049 else
2050 {
2051 if (++i >= argc)
2052 exim_fail("exim: string expected after %s\n", arg);
2053 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2054 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2055 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2056 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2057 else { badarg = TRUE; break; }
2058 }
2059 }
2060
2061 /* -bh: Host checking - an IP address must follow. */
2062
2063 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2064 {
2065 if (++i >= argc) { badarg = TRUE; break; }
2066 sender_host_address = argv[i];
2067 host_checking = checking = f.log_testing_mode = TRUE;
2068 f.host_checking_callout = argrest[1] == 'c';
2069 message_logs = FALSE;
2070 }
2071
2072 /* -bi: This option is used by sendmail to initialize *the* alias file,
2073 though it has the -oA option to specify a different file. Exim has no
2074 concept of *the* alias file, but since Sun's YP make script calls
2075 sendmail this way, some support must be provided. */
2076
2077 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2078
2079 /* -bI: provide information, of the type to follow after a colon.
2080 This is an Exim flag. */
2081
2082 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2083 {
2084 uschar *p = &argrest[2];
2085 info_flag = CMDINFO_HELP;
2086 if (Ustrlen(p))
2087 {
2088 if (strcmpic(p, CUS"sieve") == 0)
2089 {
2090 info_flag = CMDINFO_SIEVE;
2091 info_stdout = TRUE;
2092 }
2093 else if (strcmpic(p, CUS"dscp") == 0)
2094 {
2095 info_flag = CMDINFO_DSCP;
2096 info_stdout = TRUE;
2097 }
2098 else if (strcmpic(p, CUS"help") == 0)
2099 {
2100 info_stdout = TRUE;
2101 }
2102 }
2103 }
2104
2105 /* -bm: Accept and deliver message - the default option. Reinstate
2106 receiving_message, which got turned off for all -b options. */
2107
2108 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2109
2110 /* -bmalware: test the filename given for malware */
2111
2112 else if (Ustrcmp(argrest, "malware") == 0)
2113 {
2114 if (++i >= argc) { badarg = TRUE; break; }
2115 checking = TRUE;
2116 malware_test_file = argv[i];
2117 }
2118
2119 /* -bnq: For locally originating messages, do not qualify unqualified
2120 addresses. In the envelope, this causes errors; in header lines they
2121 just get left. */
2122
2123 else if (Ustrcmp(argrest, "nq") == 0)
2124 {
2125 f.allow_unqualified_sender = FALSE;
2126 f.allow_unqualified_recipient = FALSE;
2127 }
2128
2129 /* -bpxx: List the contents of the mail queue, in various forms. If
2130 the option is -bpc, just a queue count is needed. Otherwise, if the
2131 first letter after p is r, then order is random. */
2132
2133 else if (*argrest == 'p')
2134 {
2135 if (*(++argrest) == 'c')
2136 {
2137 count_queue = TRUE;
2138 if (*(++argrest) != 0) badarg = TRUE;
2139 break;
2140 }
2141
2142 if (*argrest == 'r')
2143 {
2144 list_queue_option = 8;
2145 argrest++;
2146 }
2147 else list_queue_option = 0;
2148
2149 list_queue = TRUE;
2150
2151 /* -bp: List the contents of the mail queue, top-level only */
2152
2153 if (*argrest == 0) {}
2154
2155 /* -bpu: List the contents of the mail queue, top-level undelivered */
2156
2157 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2158
2159 /* -bpa: List the contents of the mail queue, including all delivered */
2160
2161 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2162
2163 /* Unknown after -bp[r] */
2164
2165 else
2166 {
2167 badarg = TRUE;
2168 break;
2169 }
2170 }
2171
2172
2173 /* -bP: List the configuration variables given as the address list.
2174 Force -v, so configuration errors get displayed. */
2175
2176 else if (Ustrcmp(argrest, "P") == 0)
2177 {
2178 /* -bP config: we need to setup here, because later,
2179 * when list_options is checked, the config is read already */
2180 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2181 {
2182 list_config = TRUE;
2183 readconf_save_config(version_string);
2184 }
2185 else
2186 {
2187 list_options = TRUE;
2188 debug_selector |= D_v;
2189 debug_file = stderr;
2190 }
2191 }
2192
2193 /* -brt: Test retry configuration lookup */
2194
2195 else if (Ustrcmp(argrest, "rt") == 0)
2196 {
2197 checking = TRUE;
2198 test_retry_arg = i + 1;
2199 goto END_ARG;
2200 }
2201
2202 /* -brw: Test rewrite configuration */
2203
2204 else if (Ustrcmp(argrest, "rw") == 0)
2205 {
2206 checking = TRUE;
2207 test_rewrite_arg = i + 1;
2208 goto END_ARG;
2209 }
2210
2211 /* -bS: Read SMTP commands on standard input, but produce no replies -
2212 all errors are reported by sending messages. */
2213
2214 else if (Ustrcmp(argrest, "S") == 0)
2215 smtp_input = smtp_batched_input = receiving_message = TRUE;
2216
2217 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2218 on standard output. */
2219
2220 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2221
2222 /* -bt: address testing mode */
2223
2224 else if (Ustrcmp(argrest, "t") == 0)
2225 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2226
2227 /* -bv: verify addresses */
2228
2229 else if (Ustrcmp(argrest, "v") == 0)
2230 verify_address_mode = checking = f.log_testing_mode = TRUE;
2231
2232 /* -bvs: verify sender addresses */
2233
2234 else if (Ustrcmp(argrest, "vs") == 0)
2235 {
2236 verify_address_mode = checking = f.log_testing_mode = TRUE;
2237 verify_as_sender = TRUE;
2238 }
2239
2240 /* -bV: Print version string and support details */
2241
2242 else if (Ustrcmp(argrest, "V") == 0)
2243 {
2244 printf("Exim version %s #%s built %s\n", version_string,
2245 version_cnumber, version_date);
2246 printf("%s\n", CS version_copyright);
2247 version_printed = TRUE;
2248 show_whats_supported(stdout);
2249 f.log_testing_mode = TRUE;
2250 }
2251
2252 /* -bw: inetd wait mode, accept a listening socket as stdin */
2253
2254 else if (*argrest == 'w')
2255 {
2256 f.inetd_wait_mode = TRUE;
2257 f.background_daemon = FALSE;
2258 f.daemon_listen = TRUE;
2259 if (*(++argrest) != '\0')
2260 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2261 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2262 }
2263
2264 else badarg = TRUE;
2265 break;
2266
2267
2268 /* -C: change configuration file list; ignore if it isn't really
2269 a change! Enforce a prefix check if required. */
2270
2271 case 'C':
2272 if (*argrest == 0)
2273 {
2274 if(++i < argc) argrest = argv[i]; else
2275 { badarg = TRUE; break; }
2276 }
2277 if (Ustrcmp(config_main_filelist, argrest) != 0)
2278 {
2279 #ifdef ALT_CONFIG_PREFIX
2280 int sep = 0;
2281 int len = Ustrlen(ALT_CONFIG_PREFIX);
2282 const uschar *list = argrest;
2283 uschar *filename;
2284 while((filename = string_nextinlist(&list, &sep, big_buffer,
2285 big_buffer_size)) != NULL)
2286 {
2287 if ((Ustrlen(filename) < len ||
2288 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2289 Ustrstr(filename, "/../") != NULL) &&
2290 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2291 exim_fail("-C Permission denied\n");
2292 }
2293 #endif
2294 if (real_uid != root_uid)
2295 {
2296 #ifdef TRUSTED_CONFIG_LIST
2297
2298 if (real_uid != exim_uid
2299 #ifdef CONFIGURE_OWNER
2300 && real_uid != config_uid
2301 #endif
2302 )
2303 f.trusted_config = FALSE;
2304 else
2305 {
2306 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2307 if (trust_list)
2308 {
2309 struct stat statbuf;
2310
2311 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2312 (statbuf.st_uid != root_uid /* owner not root */
2313 #ifdef CONFIGURE_OWNER
2314 && statbuf.st_uid != config_uid /* owner not the special one */
2315 #endif
2316 ) || /* or */
2317 (statbuf.st_gid != root_gid /* group not root */
2318 #ifdef CONFIGURE_GROUP
2319 && statbuf.st_gid != config_gid /* group not the special one */
2320 #endif
2321 && (statbuf.st_mode & 020) != 0 /* group writeable */
2322 ) || /* or */
2323 (statbuf.st_mode & 2) != 0) /* world writeable */
2324 {
2325 f.trusted_config = FALSE;
2326 fclose(trust_list);
2327 }
2328 else
2329 {
2330 /* Well, the trust list at least is up to scratch... */
2331 rmark reset_point = store_mark();
2332 uschar *trusted_configs[32];
2333 int nr_configs = 0;
2334 int i = 0;
2335
2336 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2337 {
2338 uschar *start = big_buffer, *nl;
2339 while (*start && isspace(*start))
2340 start++;
2341 if (*start != '/')
2342 continue;
2343 nl = Ustrchr(start, '\n');
2344 if (nl)
2345 *nl = 0;
2346 trusted_configs[nr_configs++] = string_copy(start);
2347 if (nr_configs == 32)
2348 break;
2349 }
2350 fclose(trust_list);
2351
2352 if (nr_configs)
2353 {
2354 int sep = 0;
2355 const uschar *list = argrest;
2356 uschar *filename;
2357 while (f.trusted_config && (filename = string_nextinlist(&list,
2358 &sep, big_buffer, big_buffer_size)) != NULL)
2359 {
2360 for (i=0; i < nr_configs; i++)
2361 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2362 break;
2363 if (i == nr_configs)
2364 {
2365 f.trusted_config = FALSE;
2366 break;
2367 }
2368 }
2369 }
2370 else /* No valid prefixes found in trust_list file. */
2371 f.trusted_config = FALSE;
2372 store_reset(reset_point);
2373 }
2374 }
2375 else /* Could not open trust_list file. */
2376 f.trusted_config = FALSE;
2377 }
2378 #else
2379 /* Not root; don't trust config */
2380 f.trusted_config = FALSE;
2381 #endif
2382 }
2383
2384 config_main_filelist = argrest;
2385 f.config_changed = TRUE;
2386 }
2387 break;
2388
2389
2390 /* -D: set up a macro definition */
2391
2392 case 'D':
2393 #ifdef DISABLE_D_OPTION
2394 exim_fail("exim: -D is not available in this Exim binary\n");
2395 #else
2396 {
2397 int ptr = 0;
2398 macro_item *m;
2399 uschar name[24];
2400 uschar *s = argrest;
2401
2402 opt_D_used = TRUE;
2403 while (isspace(*s)) s++;
2404
2405 if (*s < 'A' || *s > 'Z')
2406 exim_fail("exim: macro name set by -D must start with "
2407 "an upper case letter\n");
2408
2409 while (isalnum(*s) || *s == '_')
2410 {
2411 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2412 s++;
2413 }
2414 name[ptr] = 0;
2415 if (ptr == 0) { badarg = TRUE; break; }
2416 while (isspace(*s)) s++;
2417 if (*s != 0)
2418 {
2419 if (*s++ != '=') { badarg = TRUE; break; }
2420 while (isspace(*s)) s++;
2421 }
2422
2423 for (m = macros_user; m; m = m->next)
2424 if (Ustrcmp(m->name, name) == 0)
2425 exim_fail("exim: duplicated -D in command line\n");
2426
2427 m = macro_create(name, s, TRUE);
2428
2429 if (clmacro_count >= MAX_CLMACROS)
2430 exim_fail("exim: too many -D options on command line\n");
2431 clmacros[clmacro_count++] =
2432 string_sprintf("-D%s=%s", m->name, m->replacement);
2433 }
2434 #endif
2435 break;
2436
2437 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2438 The latter is now a no-op, retained for compatibility only. If -dd is used,
2439 debugging subprocesses of the daemon is disabled. */
2440
2441 case 'd':
2442 if (Ustrcmp(argrest, "ropcr") == 0)
2443 {
2444 /* drop_cr = TRUE; */
2445 }
2446
2447 /* Use an intermediate variable so that we don't set debugging while
2448 decoding the debugging bits. */
2449
2450 else
2451 {
2452 unsigned int selector = D_default;
2453 debug_selector = 0;
2454 debug_file = NULL;
2455 if (*argrest == 'd')
2456 {
2457 f.debug_daemon = TRUE;
2458 argrest++;
2459 }
2460 if (*argrest != 0)
2461 decode_bits(&selector, 1, debug_notall, argrest,
2462 debug_options, debug_options_count, US"debug", 0);
2463 debug_selector = selector;
2464 }
2465 break;
2466
2467
2468 /* -E: This is a local error message. This option is not intended for
2469 external use at all, but is not restricted to trusted callers because it
2470 does no harm (just suppresses certain error messages) and if Exim is run
2471 not setuid root it won't always be trusted when it generates error
2472 messages using this option. If there is a message id following -E, point
2473 message_reference at it, for logging. */
2474
2475 case 'E':
2476 f.local_error_message = TRUE;
2477 if (mac_ismsgid(argrest)) message_reference = argrest;
2478 break;
2479
2480
2481 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2482 option, so it looks as if historically the -oex options are also callable
2483 without the leading -o. So we have to accept them. Before the switch,
2484 anything starting -oe has been converted to -e. Exim does not support all
2485 of the sendmail error options. */
2486
2487 case 'e':
2488 if (Ustrcmp(argrest, "e") == 0)
2489 {
2490 arg_error_handling = ERRORS_SENDER;
2491 errors_sender_rc = EXIT_SUCCESS;
2492 }
2493 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2494 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2495 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2496 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2497 else badarg = TRUE;
2498 break;
2499
2500
2501 /* -F: Set sender's full name, used instead of the gecos entry from
2502 the password file. Since users can usually alter their gecos entries,
2503 there's no security involved in using this instead. The data can follow
2504 the -F or be in the next argument. */
2505
2506 case 'F':
2507 if (*argrest == 0)
2508 {
2509 if(++i < argc) argrest = argv[i]; else
2510 { badarg = TRUE; break; }
2511 }
2512 originator_name = argrest;
2513 f.sender_name_forced = TRUE;
2514 break;
2515
2516
2517 /* -f: Set sender's address - this value is only actually used if Exim is
2518 run by a trusted user, or if untrusted_set_sender is set and matches the
2519 address, except that the null address can always be set by any user. The
2520 test for this happens later, when the value given here is ignored when not
2521 permitted. For an untrusted user, the actual sender is still put in Sender:
2522 if it doesn't match the From: header (unless no_local_from_check is set).
2523 The data can follow the -f or be in the next argument. The -r switch is an
2524 obsolete form of -f but since there appear to be programs out there that
2525 use anything that sendmail has ever supported, better accept it - the
2526 synonymizing is done before the switch above.
2527
2528 At this stage, we must allow domain literal addresses, because we don't
2529 know what the setting of allow_domain_literals is yet. Ditto for trailing
2530 dots and strip_trailing_dot. */
2531
2532 case 'f':
2533 {
2534 int dummy_start, dummy_end;
2535 uschar *errmess;
2536 if (*argrest == 0)
2537 {
2538 if (i+1 < argc) argrest = argv[++i]; else
2539 { badarg = TRUE; break; }
2540 }
2541 if (*argrest == 0)
2542 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2543 else
2544 {
2545 uschar *temp = argrest + Ustrlen(argrest) - 1;
2546 while (temp >= argrest && isspace(*temp)) temp--;
2547 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2548 allow_domain_literals = TRUE;
2549 strip_trailing_dot = TRUE;
2550 #ifdef SUPPORT_I18N
2551 allow_utf8_domains = TRUE;
2552 #endif
2553 sender_address = parse_extract_address(argrest, &errmess,
2554 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2555 sender_address = string_copy_taint(sender_address, TRUE);
2556 #ifdef SUPPORT_I18N
2557 message_smtputf8 = string_is_utf8(sender_address);
2558 allow_utf8_domains = FALSE;
2559 #endif
2560 allow_domain_literals = FALSE;
2561 strip_trailing_dot = FALSE;
2562 if (!sender_address)
2563 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2564 }
2565 f.sender_address_forced = TRUE;
2566 }
2567 break;
2568
2569 /* -G: sendmail invocation to specify that it's a gateway submission and
2570 sendmail may complain about problems instead of fixing them.
2571 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2572 not at this time complain about problems. */
2573
2574 case 'G':
2575 flag_G = TRUE;
2576 break;
2577
2578 /* -h: Set the hop count for an incoming message. Exim does not currently
2579 support this; it always computes it by counting the Received: headers.
2580 To put it in will require a change to the spool header file format. */
2581
2582 case 'h':
2583 if (*argrest == 0)
2584 {
2585 if(++i < argc) argrest = argv[i]; else
2586 { badarg = TRUE; break; }
2587 }
2588 if (!isdigit(*argrest)) badarg = TRUE;
2589 break;
2590
2591
2592 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2593 not to be documented for sendmail but mailx (at least) uses it) */
2594
2595 case 'i':
2596 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2597 break;
2598
2599
2600 /* -L: set the identifier used for syslog; equivalent to setting
2601 syslog_processname in the config file, but needs to be an admin option. */
2602
2603 case 'L':
2604 if (*argrest == '\0')
2605 {
2606 if(++i < argc) argrest = argv[i]; else
2607 { badarg = TRUE; break; }
2608 }
2609 if ((sz = Ustrlen(argrest)) > 32)
2610 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2611 if (sz < 1)
2612 exim_fail("exim: the -L syslog name is too short\n");
2613 cmdline_syslog_name = argrest;
2614 break;
2615
2616 case 'M':
2617 receiving_message = FALSE;
2618
2619 /* -MC: continue delivery of another message via an existing open
2620 file descriptor. This option is used for an internal call by the
2621 smtp transport when there is a pending message waiting to go to an
2622 address to which it has got a connection. Five subsequent arguments are
2623 required: transport name, host name, IP address, sequence number, and
2624 message_id. Transports may decline to create new processes if the sequence
2625 number gets too big. The channel is stdin. This (-MC) must be the last
2626 argument. There's a subsequent check that the real-uid is privileged.
2627
2628 If we are running in the test harness. delay for a bit, to let the process
2629 that set this one up complete. This makes for repeatability of the logging,
2630 etc. output. */
2631
2632 if (Ustrcmp(argrest, "C") == 0)
2633 {
2634 union sockaddr_46 interface_sock;
2635 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2636
2637 if (argc != i + 6)
2638 exim_fail("exim: too many or too few arguments after -MC\n");
2639
2640 if (msg_action_arg >= 0)
2641 exim_fail("exim: incompatible arguments\n");
2642
2643 continue_transport = argv[++i];
2644 continue_hostname = argv[++i];
2645 continue_host_address = argv[++i];
2646 continue_sequence = Uatoi(argv[++i]);
2647 msg_action = MSG_DELIVER;
2648 msg_action_arg = ++i;
2649 forced_delivery = TRUE;
2650 queue_run_pid = passed_qr_pid;
2651 queue_run_pipe = passed_qr_pipe;
2652
2653 if (!mac_ismsgid(argv[i]))
2654 exim_fail("exim: malformed message id %s after -MC option\n",
2655 argv[i]);
2656
2657 /* Set up $sending_ip_address and $sending_port, unless proxied */
2658
2659 if (!continue_proxy_cipher)
2660 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2661 &size) == 0)
2662 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2663 &sending_port);
2664 else
2665 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2666 strerror(errno));
2667
2668 if (f.running_in_test_harness) millisleep(500);
2669 break;
2670 }
2671
2672 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2673 {
2674 switch(argrest[1])
2675 {
2676 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2677 precedes -MC (see above). The flag indicates that the host to which
2678 Exim is connected has accepted an AUTH sequence. */
2679
2680 case 'A': f.smtp_authenticated = TRUE; break;
2681
2682 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2683 that exim is connected to supports the esmtp extension DSN */
2684
2685 case 'D': smtp_peer_options |= OPTION_DSN; break;
2686
2687 /* -MCG: set the queue name, to a non-default value */
2688
2689 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2690 else badarg = TRUE;
2691 break;
2692
2693 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2694
2695 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2696
2697 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2698 it preceded -MC (see above) */
2699
2700 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2701
2702 /* -MCQ: pass on the pid of the queue-running process that started
2703 this chain of deliveries and the fd of its synchronizing pipe; this
2704 is useful only when it precedes -MC (see above) */
2705
2706 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2707 else badarg = TRUE;
2708 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2709 else badarg = TRUE;
2710 break;
2711
2712 /* -MCS: set the smtp_use_size flag; this is useful only when it
2713 precedes -MC (see above) */
2714
2715 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2716
2717 #ifndef DISABLE_TLS
2718 /* -MCt: similar to -MCT below but the connection is still open
2719 via a proxy process which handles the TLS context and coding.
2720 Require three arguments for the proxied local address and port,
2721 and the TLS cipher. */
2722
2723 case 't': if (++i < argc) sending_ip_address = argv[i];
2724 else badarg = TRUE;
2725 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2726 else badarg = TRUE;
2727 if (++i < argc) continue_proxy_cipher = argv[i];
2728 else badarg = TRUE;
2729 /*FALLTHROUGH*/
2730
2731 /* -MCT: set the tls_offered flag; this is useful only when it
2732 precedes -MC (see above). The flag indicates that the host to which
2733 Exim is connected has offered TLS support. */
2734
2735 case 'T': smtp_peer_options |= OPTION_TLS; break;
2736 #endif
2737
2738 default: badarg = TRUE; break;
2739 }
2740 break;
2741 }
2742
2743 /* -M[x]: various operations on the following list of message ids:
2744 -M deliver the messages, ignoring next retry times and thawing
2745 -Mc deliver the messages, checking next retry times, no thawing
2746 -Mf freeze the messages
2747 -Mg give up on the messages
2748 -Mt thaw the messages
2749 -Mrm remove the messages
2750 In the above cases, this must be the last option. There are also the
2751 following options which are followed by a single message id, and which
2752 act on that message. Some of them use the "recipient" addresses as well.
2753 -Mar add recipient(s)
2754 -Mmad mark all recipients delivered
2755 -Mmd mark recipients(s) delivered
2756 -Mes edit sender
2757 -Mset load a message for use with -be
2758 -Mvb show body
2759 -Mvc show copy (of whole message, in RFC 2822 format)
2760 -Mvh show header
2761 -Mvl show log
2762 */
2763
2764 else if (*argrest == 0)
2765 {
2766 msg_action = MSG_DELIVER;
2767 forced_delivery = f.deliver_force_thaw = TRUE;
2768 }
2769 else if (Ustrcmp(argrest, "ar") == 0)
2770 {
2771 msg_action = MSG_ADD_RECIPIENT;
2772 one_msg_action = TRUE;
2773 }
2774 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2775 else if (Ustrcmp(argrest, "es") == 0)
2776 {
2777 msg_action = MSG_EDIT_SENDER;
2778 one_msg_action = TRUE;
2779 }
2780 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2781 else if (Ustrcmp(argrest, "g") == 0)
2782 {
2783 msg_action = MSG_DELIVER;
2784 deliver_give_up = TRUE;
2785 }
2786 else if (Ustrcmp(argrest, "mad") == 0)
2787 {
2788 msg_action = MSG_MARK_ALL_DELIVERED;
2789 }
2790 else if (Ustrcmp(argrest, "md") == 0)
2791 {
2792 msg_action = MSG_MARK_DELIVERED;
2793 one_msg_action = TRUE;
2794 }
2795 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2796 else if (Ustrcmp(argrest, "set") == 0)
2797 {
2798 msg_action = MSG_LOAD;
2799 one_msg_action = TRUE;
2800 }
2801 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2802 else if (Ustrcmp(argrest, "vb") == 0)
2803 {
2804 msg_action = MSG_SHOW_BODY;
2805 one_msg_action = TRUE;
2806 }
2807 else if (Ustrcmp(argrest, "vc") == 0)
2808 {
2809 msg_action = MSG_SHOW_COPY;
2810 one_msg_action = TRUE;
2811 }
2812 else if (Ustrcmp(argrest, "vh") == 0)
2813 {
2814 msg_action = MSG_SHOW_HEADER;
2815 one_msg_action = TRUE;
2816 }
2817 else if (Ustrcmp(argrest, "vl") == 0)
2818 {
2819 msg_action = MSG_SHOW_LOG;
2820 one_msg_action = TRUE;
2821 }
2822 else { badarg = TRUE; break; }
2823
2824 /* All the -Mxx options require at least one message id. */
2825
2826 msg_action_arg = i + 1;
2827 if (msg_action_arg >= argc)
2828 exim_fail("exim: no message ids given after %s option\n", arg);
2829
2830 /* Some require only message ids to follow */
2831
2832 if (!one_msg_action)
2833 {
2834 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2835 exim_fail("exim: malformed message id %s after %s option\n",
2836 argv[j], arg);
2837 goto END_ARG; /* Remaining args are ids */
2838 }
2839
2840 /* Others require only one message id, possibly followed by addresses,
2841 which will be handled as normal arguments. */
2842
2843 else
2844 {
2845 if (!mac_ismsgid(argv[msg_action_arg]))
2846 exim_fail("exim: malformed message id %s after %s option\n",
2847 argv[msg_action_arg], arg);
2848 i++;
2849 }
2850 break;
2851
2852
2853 /* Some programs seem to call the -om option without the leading o;
2854 for sendmail it askes for "me too". Exim always does this. */
2855
2856 case 'm':
2857 if (*argrest != 0) badarg = TRUE;
2858 break;
2859
2860
2861 /* -N: don't do delivery - a debugging option that stops transports doing
2862 their thing. It implies debugging at the D_v level. */
2863
2864 case 'N':
2865 if (*argrest == 0)
2866 {
2867 f.dont_deliver = TRUE;
2868 debug_selector |= D_v;
2869 debug_file = stderr;
2870 }
2871 else badarg = TRUE;
2872 break;
2873
2874
2875 /* -n: This means "don't alias" in sendmail, apparently.
2876 For normal invocations, it has no effect.
2877 It may affect some other options. */
2878
2879 case 'n':
2880 flag_n = TRUE;
2881 break;
2882
2883 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2884 option to the specified value. This form uses long names. We need to handle
2885 -O option=value and -Ooption=value. */
2886
2887 case 'O':
2888 if (*argrest == 0)
2889 {
2890 if (++i >= argc)
2891 exim_fail("exim: string expected after -O\n");
2892 }
2893 break;
2894
2895 case 'o':
2896
2897 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2898 file" option). */
2899
2900 if (*argrest == 'A')
2901 {
2902 alias_arg = argrest + 1;
2903 if (alias_arg[0] == 0)
2904 {
2905 if (i+1 < argc) alias_arg = argv[++i]; else
2906 exim_fail("exim: string expected after -oA\n");
2907 }
2908 }
2909
2910 /* -oB: Set a connection message max value for remote deliveries */
2911
2912 else if (*argrest == 'B')
2913 {
2914 uschar *p = argrest + 1;
2915 if (p[0] == 0)
2916 {
2917 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2918 {
2919 connection_max_messages = 1;
2920 p = NULL;
2921 }
2922 }
2923
2924 if (p != NULL)
2925 {
2926 if (!isdigit(*p))
2927 exim_fail("exim: number expected after -oB\n");
2928 connection_max_messages = Uatoi(p);
2929 }
2930 }
2931
2932 /* -odb: background delivery */
2933
2934 else if (Ustrcmp(argrest, "db") == 0)
2935 {
2936 f.synchronous_delivery = FALSE;
2937 arg_queue_only = FALSE;
2938 queue_only_set = TRUE;
2939 }
2940
2941 /* -odf: foreground delivery (smail-compatible option); same effect as
2942 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2943 */
2944
2945 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2946 {
2947 f.synchronous_delivery = TRUE;
2948 arg_queue_only = FALSE;
2949 queue_only_set = TRUE;
2950 }
2951
2952 /* -odq: queue only */
2953
2954 else if (Ustrcmp(argrest, "dq") == 0)
2955 {
2956 f.synchronous_delivery = FALSE;
2957 arg_queue_only = TRUE;
2958 queue_only_set = TRUE;
2959 }
2960
2961 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2962 but no remote delivery */
2963
2964 else if (Ustrcmp(argrest, "dqs") == 0)
2965 {
2966 f.queue_smtp = TRUE;
2967 arg_queue_only = FALSE;
2968 queue_only_set = TRUE;
2969 }
2970
2971 /* -oex: Sendmail error flags. As these are also accepted without the
2972 leading -o prefix, for compatibility with vacation and other callers,
2973 they are handled with -e above. */
2974
2975 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2976 -oitrue: Another sendmail syntax for the same */
2977
2978 else if (Ustrcmp(argrest, "i") == 0 ||
2979 Ustrcmp(argrest, "itrue") == 0)
2980 f.dot_ends = FALSE;
2981
2982 /* -oM*: Set various characteristics for an incoming message; actually
2983 acted on for trusted callers only. */
2984
2985 else if (*argrest == 'M')
2986 {
2987 if (i+1 >= argc)
2988 exim_fail("exim: data expected after -o%s\n", argrest);
2989
2990 /* -oMa: Set sender host address */
2991
2992 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2993
2994 /* -oMaa: Set authenticator name */
2995
2996 else if (Ustrcmp(argrest, "Maa") == 0)
2997 sender_host_authenticated = argv[++i];
2998
2999 /* -oMas: setting authenticated sender */
3000
3001 else if (Ustrcmp(argrest, "Mas") == 0)
3002 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3003
3004 /* -oMai: setting authenticated id */
3005
3006 else if (Ustrcmp(argrest, "Mai") == 0)
3007 authenticated_id = string_copy_taint(argv[++i], TRUE);
3008
3009 /* -oMi: Set incoming interface address */
3010
3011 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3012
3013 /* -oMm: Message reference */
3014
3015 else if (Ustrcmp(argrest, "Mm") == 0)
3016 {
3017 if (!mac_ismsgid(argv[i+1]))
3018 exim_fail("-oMm must be a valid message ID\n");
3019 if (!f.trusted_config)
3020 exim_fail("-oMm must be called by a trusted user/config\n");
3021 message_reference = argv[++i];
3022 }
3023
3024 /* -oMr: Received protocol */
3025
3026 else if (Ustrcmp(argrest, "Mr") == 0)
3027
3028 if (received_protocol)
3029 exim_fail("received_protocol is set already\n");
3030 else
3031 received_protocol = argv[++i];
3032
3033 /* -oMs: Set sender host name */
3034
3035 else if (Ustrcmp(argrest, "Ms") == 0)
3036 sender_host_name = string_copy_taint(argv[++i], TRUE);
3037
3038 /* -oMt: Set sender ident */
3039
3040 else if (Ustrcmp(argrest, "Mt") == 0)
3041 {
3042 sender_ident_set = TRUE;
3043 sender_ident = argv[++i];
3044 }
3045
3046 /* Else a bad argument */
3047
3048 else
3049 {
3050 badarg = TRUE;
3051 break;
3052 }
3053 }
3054
3055 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3056 seem to call this as -m (undocumented), so that is also accepted (see
3057 above). */
3058
3059 else if (Ustrcmp(argrest, "m") == 0) {}
3060
3061 /* -oo: An ancient flag for old-style addresses which still seems to
3062 crop up in some calls (see in SCO). */
3063
3064 else if (Ustrcmp(argrest, "o") == 0) {}
3065
3066 /* -oP <name>: set pid file path for daemon */
3067
3068 else if (Ustrcmp(argrest, "P") == 0)
3069 override_pid_file_path = argv[++i];
3070
3071 /* -or <n>: set timeout for non-SMTP acceptance
3072 -os <n>: set timeout for SMTP acceptance */
3073
3074 else if (*argrest == 'r' || *argrest == 's')
3075 {
3076 int *tp = (*argrest == 'r')?
3077 &arg_receive_timeout : &arg_smtp_receive_timeout;
3078 if (argrest[1] == 0)
3079 {
3080 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3081 }
3082 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3083 if (*tp < 0)
3084 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3085 }
3086
3087 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3088
3089 else if (Ustrcmp(argrest, "X") == 0)
3090 override_local_interfaces = argv[++i];
3091
3092 /* Unknown -o argument */
3093
3094 else badarg = TRUE;
3095 break;
3096
3097
3098 /* -ps: force Perl startup; -pd force delayed Perl startup */
3099
3100 case 'p':
3101 #ifdef EXIM_PERL
3102 if (*argrest == 's' && argrest[1] == 0)
3103 {
3104 perl_start_option = 1;
3105 break;
3106 }
3107 if (*argrest == 'd' && argrest[1] == 0)
3108 {
3109 perl_start_option = -1;
3110 break;
3111 }
3112 #endif
3113
3114 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3115 which sets the host protocol and host name */
3116
3117 if (*argrest == 0)
3118 if (i+1 < argc)
3119 argrest = argv[++i];
3120 else
3121 { badarg = TRUE; break; }
3122
3123 if (*argrest != 0)
3124 {
3125 uschar *hn;
3126
3127 if (received_protocol)
3128 exim_fail("received_protocol is set already\n");
3129
3130 hn = Ustrchr(argrest, ':');
3131 if (hn == NULL)
3132 received_protocol = argrest;
3133 else
3134 {
3135 int old_pool = store_pool;
3136 store_pool = POOL_PERM;
3137 received_protocol = string_copyn(argrest, hn - argrest);
3138 store_pool = old_pool;
3139 sender_host_name = hn + 1;
3140 }
3141 }
3142 break;
3143
3144
3145 case 'q':
3146 receiving_message = FALSE;
3147 if (queue_interval >= 0)
3148 exim_fail("exim: -q specified more than once\n");
3149
3150 /* -qq...: Do queue runs in a 2-stage manner */
3151
3152 if (*argrest == 'q')
3153 {
3154 f.queue_2stage = TRUE;
3155 argrest++;
3156 }
3157
3158 /* -qi...: Do only first (initial) deliveries */
3159
3160 if (*argrest == 'i')
3161 {
3162 f.queue_run_first_delivery = TRUE;
3163 argrest++;
3164 }
3165
3166 /* -qf...: Run the queue, forcing deliveries
3167 -qff..: Ditto, forcing thawing as well */
3168
3169 if (*argrest == 'f')
3170 {
3171 f.queue_run_force = TRUE;
3172 if (*++argrest == 'f')
3173 {
3174 f.deliver_force_thaw = TRUE;
3175 argrest++;
3176 }
3177 }
3178
3179 /* -q[f][f]l...: Run the queue only on local deliveries */
3180
3181 if (*argrest == 'l')
3182 {
3183 f.queue_run_local = TRUE;
3184 argrest++;
3185 }
3186
3187 /* -q[f][f][l][G<name>]... Work on the named queue */
3188
3189 if (*argrest == 'G')
3190 {
3191 int i;
3192 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3193 queue_name = string_copyn(argrest, i);
3194 argrest += i;
3195 if (*argrest == '/') argrest++;
3196 }
3197
3198 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3199 only, optionally named, optionally starting from a given message id. */
3200
3201 if (!(list_queue || count_queue))
3202 if (*argrest == 0
3203 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3204 {
3205 queue_interval = 0;
3206 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3207 start_queue_run_id = argv[++i];
3208 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3209 stop_queue_run_id = argv[++i];
3210 }
3211
3212 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3213 forced, optionally local only, optionally named. */
3214
3215 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3216 0, FALSE)) <= 0)
3217 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3218 break;
3219
3220
3221 case 'R': /* Synonymous with -qR... */
3222 receiving_message = FALSE;
3223
3224 /* -Rf: As -R (below) but force all deliveries,
3225 -Rff: Ditto, but also thaw all frozen messages,
3226 -Rr: String is regex
3227 -Rrf: Regex and force
3228 -Rrff: Regex and force and thaw
3229
3230 in all cases provided there are no further characters in this
3231 argument. */
3232
3233 if (*argrest != 0)
3234 for (int i = 0; i < nelem(rsopts); i++)
3235 if (Ustrcmp(argrest, rsopts[i]) == 0)
3236 {
3237 if (i != 2) f.queue_run_force = TRUE;
3238 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3239 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3240 argrest += Ustrlen(rsopts[i]);
3241 }
3242
3243 /* -R: Set string to match in addresses for forced queue run to
3244 pick out particular messages. */
3245
3246 if (*argrest)
3247 deliver_selectstring = argrest;
3248 else if (i+1 < argc)
3249 deliver_selectstring = argv[++i];
3250 else
3251 exim_fail("exim: string expected after -R\n");
3252 break;
3253
3254
3255 /* -r: an obsolete synonym for -f (see above) */
3256
3257
3258 /* -S: Like -R but works on sender. */
3259
3260 case 'S': /* Synonymous with -qS... */
3261 receiving_message = FALSE;
3262
3263 /* -Sf: As -S (below) but force all deliveries,
3264 -Sff: Ditto, but also thaw all frozen messages,
3265 -Sr: String is regex
3266 -Srf: Regex and force
3267 -Srff: Regex and force and thaw
3268
3269 in all cases provided there are no further characters in this
3270 argument. */
3271
3272 if (*argrest)
3273 for (int i = 0; i < nelem(rsopts); i++)
3274 if (Ustrcmp(argrest, rsopts[i]) == 0)
3275 {
3276 if (i != 2) f.queue_run_force = TRUE;
3277 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3278 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3279 argrest += Ustrlen(rsopts[i]);
3280 }
3281
3282 /* -S: Set string to match in addresses for forced queue run to
3283 pick out particular messages. */
3284
3285 if (*argrest)
3286 deliver_selectstring_sender = argrest;
3287 else if (i+1 < argc)
3288 deliver_selectstring_sender = argv[++i];
3289 else
3290 exim_fail("exim: string expected after -S\n");
3291 break;
3292
3293 /* -Tqt is an option that is exclusively for use by the testing suite.
3294 It is not recognized in other circumstances. It allows for the setting up
3295 of explicit "queue times" so that various warning/retry things can be
3296 tested. Otherwise variability of clock ticks etc. cause problems. */
3297
3298 case 'T':
3299 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3300 fudged_queue_times = argv[++i];
3301 else badarg = TRUE;
3302 break;
3303
3304
3305 /* -t: Set flag to extract recipients from body of message. */
3306
3307 case 't':
3308 if (*argrest == 0) extract_recipients = TRUE;
3309
3310 /* -ti: Set flag to extract recipients from body of message, and also
3311 specify that dot does not end the message. */
3312
3313 else if (Ustrcmp(argrest, "i") == 0)
3314 {
3315 extract_recipients = TRUE;
3316 f.dot_ends = FALSE;
3317 }
3318
3319 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3320
3321 #ifndef DISABLE_TLS
3322 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3323 #endif
3324
3325 else badarg = TRUE;
3326 break;
3327
3328
3329 /* -U: This means "initial user submission" in sendmail, apparently. The
3330 doc claims that in future sendmail may refuse syntactically invalid
3331 messages instead of fixing them. For the moment, we just ignore it. */
3332
3333 case 'U':
3334 break;
3335
3336
3337 /* -v: verify things - this is a very low-level debugging */
3338
3339 case 'v':
3340 if (*argrest == 0)
3341 {
3342 debug_selector |= D_v;
3343 debug_file = stderr;
3344 }
3345 else badarg = TRUE;
3346 break;
3347
3348
3349 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3350
3351 The -x flag tells the sendmail command that mail from a local
3352 mail program has National Language Support (NLS) extended characters
3353 in the body of the mail item. The sendmail command can send mail with
3354 extended NLS characters across networks that normally corrupts these
3355 8-bit characters.
3356
3357 As Exim is 8-bit clean, it just ignores this flag. */
3358
3359 case 'x':
3360 if (*argrest != 0) badarg = TRUE;
3361 break;
3362
3363 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3364 logs to that file. We swallow the parameter and otherwise ignore it. */
3365
3366 case 'X':
3367 if (*argrest == '\0')
3368 if (++i >= argc)
3369 exim_fail("exim: string expected after -X\n");
3370 break;
3371
3372 case 'z':
3373 if (*argrest == '\0')
3374 if (++i < argc)
3375 log_oneline = argv[i];
3376 else
3377 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3378 break;
3379
3380 /* All other initial characters are errors */
3381
3382 default:
3383 badarg = TRUE;
3384 break;
3385 } /* End of high-level switch statement */
3386
3387 /* Failed to recognize the option, or syntax error */
3388
3389 if (badarg)
3390 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3391 "option %s\n", arg);
3392 }
3393
3394
3395 /* If -R or -S have been specified without -q, assume a single queue run. */
3396
3397 if ( (deliver_selectstring || deliver_selectstring_sender)
3398 && queue_interval < 0)
3399 queue_interval = 0;
3400
3401
3402 END_ARG:
3403 /* If usage_wanted is set we call the usage function - which never returns */
3404 if (usage_wanted) exim_usage(called_as);
3405
3406 /* Arguments have been processed. Check for incompatibilities. */
3407 if ((
3408 (smtp_input || extract_recipients || recipients_arg < argc) &&
3409 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3410 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3411 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3412 ) ||
3413 (
3414 msg_action_arg > 0 &&
3415 (f.daemon_listen || queue_interval > 0 || list_options ||
3416 (checking && msg_action != MSG_LOAD) ||
3417 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3418 ) ||
3419 (
3420 (f.daemon_listen || queue_interval > 0) &&
3421 (sender_address != NULL || list_options || list_queue || checking ||
3422 bi_option)
3423 ) ||
3424 (
3425 f.daemon_listen && queue_interval == 0
3426 ) ||
3427 (
3428 f.inetd_wait_mode && queue_interval >= 0
3429 ) ||
3430 (
3431 list_options &&
3432 (checking || smtp_input || extract_recipients ||
3433 filter_test != FTEST_NONE || bi_option)
3434 ) ||
3435 (
3436 verify_address_mode &&
3437 (f.address_test_mode || smtp_input || extract_recipients ||
3438 filter_test != FTEST_NONE || bi_option)
3439 ) ||
3440 (
3441 f.address_test_mode && (smtp_input || extract_recipients ||
3442 filter_test != FTEST_NONE || bi_option)
3443 ) ||
3444 (
3445 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3446 extract_recipients)
3447 ) ||
3448 (
3449 deliver_selectstring != NULL && queue_interval < 0
3450 ) ||
3451 (
3452 msg_action == MSG_LOAD &&
3453 (!expansion_test || expansion_test_message != NULL)
3454 )
3455 )
3456 exim_fail("exim: incompatible command-line options or arguments\n");
3457
3458 /* If debugging is set up, set the file and the file descriptor to pass on to
3459 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3460 to run in the foreground. */
3461
3462 if (debug_selector != 0)
3463 {
3464 debug_file = stderr;
3465 debug_fd = fileno(debug_file);
3466 f.background_daemon = FALSE;
3467 if (f.running_in_test_harness) millisleep(100); /* lets caller finish */
3468 if (debug_selector != D_v) /* -v only doesn't show this */
3469 {
3470 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3471 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3472 debug_selector);
3473 if (!version_printed)
3474 show_whats_supported(stderr);
3475 }
3476 }
3477
3478 /* When started with root privilege, ensure that the limits on the number of
3479 open files and the number of processes (where that is accessible) are
3480 sufficiently large, or are unset, in case Exim has been called from an
3481 environment where the limits are screwed down. Not all OS have the ability to
3482 change some of these limits. */
3483
3484 if (unprivileged)
3485 {
3486 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3487 }
3488 else
3489 {
3490 struct rlimit rlp;
3491
3492 #ifdef RLIMIT_NOFILE
3493 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3494 {
3495 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3496 strerror(errno));
3497 rlp.rlim_cur = rlp.rlim_max = 0;
3498 }
3499
3500 /* I originally chose 1000 as a nice big number that was unlikely to
3501 be exceeded. It turns out that some older OS have a fixed upper limit of
3502 256. */
3503
3504 if (rlp.rlim_cur < 1000)
3505 {
3506 rlp.rlim_cur = rlp.rlim_max = 1000;
3507 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3508 {
3509 rlp.rlim_cur = rlp.rlim_max = 256;
3510 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3511 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3512 strerror(errno));
3513 }
3514 }
3515 #endif
3516
3517 #ifdef RLIMIT_NPROC
3518 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3519 {
3520 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3521 strerror(errno));
3522 rlp.rlim_cur = rlp.rlim_max = 0;
3523 }
3524
3525 #ifdef RLIM_INFINITY
3526 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3527 {
3528 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3529 #else
3530 if (rlp.rlim_cur < 1000)
3531 {
3532 rlp.rlim_cur = rlp.rlim_max = 1000;
3533 #endif
3534 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3535 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3536 strerror(errno));
3537 }
3538 #endif
3539 }
3540
3541 /* Exim is normally entered as root (but some special configurations are
3542 possible that don't do this). However, it always spins off sub-processes that
3543 set their uid and gid as required for local delivery. We don't want to pass on
3544 any extra groups that root may belong to, so we want to get rid of them all at
3545 this point.
3546
3547 We need to obey setgroups() at this stage, before possibly giving up root
3548 privilege for a changed configuration file, but later on we might need to
3549 check on the additional groups for the admin user privilege - can't do that
3550 till after reading the config, which might specify the exim gid. Therefore,
3551 save the group list here first. */
3552
3553 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3554 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3555
3556 /* There is a fundamental difference in some BSD systems in the matter of
3557 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3558 known not to be different. On the "different" systems there is a single group
3559 list, and the first entry in it is the current group. On all other versions of
3560 Unix there is a supplementary group list, which is in *addition* to the current
3561 group. Consequently, to get rid of all extraneous groups on a "standard" system
3562 you pass over 0 groups to setgroups(), while on a "different" system you pass
3563 over a single group - the current group, which is always the first group in the
3564 list. Calling setgroups() with zero groups on a "different" system results in
3565 an error return. The following code should cope with both types of system.
3566
3567 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3568 the "setgroups() with zero groups" - and changes the egid.
3569 Thanks to that we had to stash the original_egid above, for use below
3570 in the call to exim_setugid().
3571
3572 However, if this process isn't running as root, setgroups() can't be used
3573 since you have to be root to run it, even if throwing away groups. Not being
3574 root here happens only in some unusual configurations. We just ignore the
3575 error. */
3576
3577 if (setgroups(0, NULL) != 0 && setgroups(1, group_list) != 0 && !unprivileged)
3578 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3579
3580 /* If the configuration file name has been altered by an argument on the
3581 command line (either a new file name or a macro definition) and the caller is
3582 not root, or if this is a filter testing run, remove any setuid privilege the
3583 program has and run as the underlying user.
3584
3585 The exim user is locked out of this, which severely restricts the use of -C
3586 for some purposes.
3587
3588 Otherwise, set the real ids to the effective values (should be root unless run
3589 from inetd, which it can either be root or the exim uid, if one is configured).
3590
3591 There is a private mechanism for bypassing some of this, in order to make it
3592 possible to test lots of configurations automatically, without having either to
3593 recompile each time, or to patch in an actual configuration file name and other
3594 values (such as the path name). If running in the test harness, pretend that
3595 configuration file changes and macro definitions haven't happened. */
3596
3597 if (( /* EITHER */
3598 (!f.trusted_config || /* Config changed, or */
3599 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3600 real_uid != root_uid && /* Not root, and */
3601 !f.running_in_test_harness /* Not fudged */
3602 ) || /* OR */
3603 expansion_test /* expansion testing */
3604 || /* OR */
3605 filter_test != FTEST_NONE) /* Filter testing */
3606 {
3607 setgroups(group_count, group_list);
3608 exim_setugid(real_uid, real_gid, FALSE,
3609 US"-C, -D, -be or -bf forces real uid");
3610 removed_privilege = TRUE;
3611
3612 /* In the normal case when Exim is called like this, stderr is available
3613 and should be used for any logging information because attempts to write
3614 to the log will usually fail. To arrange this, we unset really_exim. However,
3615 if no stderr is available there is no point - we might as well have a go
3616 at the log (if it fails, syslog will be written).
3617
3618 Note that if the invoker is Exim, the logs remain available. Messing with
3619 this causes unlogged successful deliveries. */
3620
3621 if (log_stderr && real_uid != exim_uid)
3622 f.really_exim = FALSE;
3623 }
3624
3625 /* Privilege is to be retained for the moment. It may be dropped later,
3626 depending on the job that this Exim process has been asked to do. For now, set
3627 the real uid to the effective so that subsequent re-execs of Exim are done by a
3628 privileged user. */
3629
3630 else
3631 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3632
3633 /* If testing a filter, open the file(s) now, before wasting time doing other
3634 setups and reading the message. */
3635
3636 if (filter_test & FTEST_SYSTEM)
3637 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3638 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3639 strerror(errno));
3640
3641 if (filter_test & FTEST_USER)
3642 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3643 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3644 strerror(errno));
3645
3646 /* Initialise lookup_list
3647 If debugging, already called above via version reporting.
3648 In either case, we initialise the list of available lookups while running
3649 as root. All dynamically modules are loaded from a directory which is
3650 hard-coded into the binary and is code which, if not a module, would be
3651 part of Exim already. Ability to modify the content of the directory
3652 is equivalent to the ability to modify a setuid binary!
3653
3654 This needs to happen before we read the main configuration. */
3655 init_lookup_list();
3656
3657 #ifdef SUPPORT_I18N
3658 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3659 #endif
3660
3661 /* Read the main runtime configuration data; this gives up if there
3662 is a failure. It leaves the configuration file open so that the subsequent
3663 configuration data for delivery can be read if needed.
3664
3665 NOTE: immediately after opening the configuration file we change the working
3666 directory to "/"! Later we change to $spool_directory. We do it there, because
3667 during readconf_main() some expansion takes place already. */
3668
3669 /* Store the initial cwd before we change directories. Can be NULL if the
3670 dir has already been unlinked. */
3671 initial_cwd = os_getcwd(NULL, 0);
3672
3673 /* checking:
3674 -be[m] expansion test -
3675 -b[fF] filter test new
3676 -bh[c] host test -
3677 -bmalware malware_test_file new
3678 -brt retry test new
3679 -brw rewrite test new
3680 -bt address test -
3681 -bv[s] address verify -
3682 list_options:
3683 -bP <option> (except -bP config, which sets list_config)
3684
3685 If any of these options is set, we suppress warnings about configuration
3686 issues (currently about tls_advertise_hosts and keep_environment not being
3687 defined) */
3688
3689 readconf_main(checking || list_options);
3690
3691
3692 /* Now in directory "/" */
3693
3694 if (cleanup_environment() == FALSE)
3695 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3696
3697
3698 /* If an action on specific messages is requested, or if a daemon or queue
3699 runner is being started, we need to know if Exim was called by an admin user.
3700 This is the case if the real user is root or exim, or if the real group is
3701 exim, or if one of the supplementary groups is exim or a group listed in
3702 admin_groups. We don't fail all message actions immediately if not admin_user,
3703 since some actions can be performed by non-admin users. Instead, set admin_user
3704 for later interrogation. */
3705
3706 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3707 f.admin_user = TRUE;
3708 else
3709 for (int i = 0; i < group_count && !f.admin_user; i++)
3710 if (group_list[i] == exim_gid)
3711 f.admin_user = TRUE;
3712 else if (admin_groups)
3713 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3714 if (admin_groups[j] == group_list[i])
3715 f.admin_user = TRUE;
3716
3717 /* Another group of privileged users are the trusted users. These are root,
3718 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3719 are permitted to specify sender_addresses with -f on the command line, and
3720 other message parameters as well. */
3721
3722 if (real_uid == root_uid || real_uid == exim_uid)
3723 f.trusted_caller = TRUE;
3724 else
3725 {
3726 if (trusted_users)
3727 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3728 if (trusted_users[i] == real_uid)
3729 f.trusted_caller = TRUE;
3730
3731 if (trusted_groups)
3732 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3733 if (trusted_groups[i] == real_gid)
3734 f.trusted_caller = TRUE;
3735 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3736 if (trusted_groups[i] == group_list[j])
3737 f.trusted_caller = TRUE;
3738 }
3739
3740 /* At this point, we know if the user is privileged and some command-line
3741 options become possibly impermissible, depending upon the configuration file. */
3742
3743 if (checking && commandline_checks_require_admin && !f.admin_user)
3744 exim_fail("exim: those command-line flags are set to require admin\n");
3745
3746 /* Handle the decoding of logging options. */
3747
3748 decode_bits(log_selector, log_selector_size, log_notall,
3749 log_selector_string, log_options, log_options_count, US"log", 0);
3750
3751 DEBUG(D_any)
3752 {
3753 debug_printf("configuration file is %s\n", config_main_filename);
3754 debug_printf("log selectors =");
3755 for (int i = 0; i < log_selector_size; i++)
3756 debug_printf(" %08x", log_selector[i]);
3757 debug_printf("\n");
3758 }
3759
3760 /* If domain literals are not allowed, check the sender address that was
3761 supplied with -f. Ditto for a stripped trailing dot. */
3762
3763 if (sender_address)
3764 {
3765 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3766 exim_fail("exim: bad -f address \"%s\": domain literals not "
3767 "allowed\n", sender_address);
3768 if (f_end_dot && !strip_trailing_dot)
3769 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3770 "(trailing dot not allowed)\n", sender_address);
3771 }
3772
3773 /* See if an admin user overrode our logging. */
3774
3775 if (cmdline_syslog_name)
3776 if (f.admin_user)
3777 {
3778 syslog_processname = cmdline_syslog_name;
3779 log_file_path = string_copy(CUS"syslog");
3780 }
3781 else
3782 /* not a panic, non-privileged users should not be able to spam paniclog */
3783 exim_fail(
3784 "exim: you lack sufficient privilege to specify syslog process name\n");
3785
3786 /* Paranoia check of maximum lengths of certain strings. There is a check
3787 on the length of the log file path in log.c, which will come into effect
3788 if there are any calls to write the log earlier than this. However, if we
3789 get this far but the string is very long, it is better to stop now than to
3790 carry on and (e.g.) receive a message and then have to collapse. The call to
3791 log_write() from here will cause the ultimate panic collapse if the complete
3792 file name exceeds the buffer length. */
3793
3794 if (Ustrlen(log_file_path) > 200)
3795 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3796 "log_file_path is longer than 200 chars: aborting");
3797
3798 if (Ustrlen(pid_file_path) > 200)
3799 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3800 "pid_file_path is longer than 200 chars: aborting");
3801
3802 if (Ustrlen(spool_directory) > 200)
3803 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3804 "spool_directory is longer than 200 chars: aborting");
3805
3806 /* Length check on the process name given to syslog for its TAG field,
3807 which is only permitted to be 32 characters or less. See RFC 3164. */
3808
3809 if (Ustrlen(syslog_processname) > 32)
3810 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3811 "syslog_processname is longer than 32 chars: aborting");
3812
3813 if (log_oneline)
3814 if (f.admin_user)
3815 {
3816 log_write(0, LOG_MAIN, "%s", log_oneline);
3817 return EXIT_SUCCESS;
3818 }
3819 else
3820 return EXIT_FAILURE;
3821
3822 /* In some operating systems, the environment variable TMPDIR controls where
3823 temporary files are created; Exim doesn't use these (apart from when delivering
3824 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3825 If TMPDIR is found in the environment, reset it to the value defined in the
3826 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3827 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3828 EXIM_TMPDIR by the build scripts.
3829 */
3830
3831 #ifdef EXIM_TMPDIR
3832 if (environ) for (uschar ** p = USS environ; *p; p++)
3833 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3834 {
3835 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3836 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3837 *p = newp;
3838 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3839 }
3840 #endif
3841
3842 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3843 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3844 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3845 called by a user who has set the TZ variable. This then affects the timestamps
3846 in log files and in Received: headers, and any created Date: header lines. The
3847 required timezone is settable in the configuration file, so nothing can be done
3848 about this earlier - but hopefully nothing will normally be logged earlier than
3849 this. We have to make a new environment if TZ is wrong, but don't bother if
3850 timestamps_utc is set, because then all times are in UTC anyway. */
3851
3852 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3853 f.timestamps_utc = TRUE;
3854 else
3855 {
3856 uschar *envtz = US getenv("TZ");
3857 if (envtz
3858 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3859 : timezone_string != NULL
3860 )
3861 {
3862 uschar **p = USS environ;
3863 uschar **new;
3864 uschar **newp;
3865 int count = 0;
3866 if (environ) while (*p++) count++;
3867 if (!envtz) count++;
3868 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3869 if (environ) for (p = USS environ; *p; p++)
3870 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3871 if (timezone_string)
3872 {
3873 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3874 sprintf(CS *newp++, "TZ=%s", timezone_string);
3875 }
3876 *newp = NULL;
3877 environ = CSS new;
3878 tzset();
3879 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3880 tod_stamp(tod_log));
3881 }
3882 }
3883
3884 /* Handle the case when we have removed the setuid privilege because of -C or
3885 -D. This means that the caller of Exim was not root.
3886
3887 There is a problem if we were running as the Exim user. The sysadmin may
3888 expect this case to retain privilege because "the binary was called by the
3889 Exim user", but it hasn't, because either the -D option set macros, or the
3890 -C option set a non-trusted configuration file. There are two possibilities:
3891
3892 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3893 to do message deliveries. Thus, the fact that it is running as a
3894 non-privileged user is plausible, and might be wanted in some special
3895 configurations. However, really_exim will have been set false when
3896 privilege was dropped, to stop Exim trying to write to its normal log
3897 files. Therefore, re-enable normal log processing, assuming the sysadmin
3898 has set up the log directory correctly.
3899
3900 (2) If deliver_drop_privilege is not set, the configuration won't work as
3901 apparently intended, and so we log a panic message. In order to retain
3902 root for -C or -D, the caller must either be root or be invoking a
3903 trusted configuration file (when deliver_drop_privilege is false). */
3904
3905 if ( removed_privilege
3906 && (!f.trusted_config || opt_D_used)
3907 && real_uid == exim_uid)
3908 if (deliver_drop_privilege)
3909 f.really_exim = TRUE; /* let logging work normally */
3910 else
3911 log_write(0, LOG_MAIN|LOG_PANIC,
3912 "exim user lost privilege for using %s option",
3913 f.trusted_config? "-D" : "-C");
3914
3915 /* Start up Perl interpreter if Perl support is configured and there is a
3916 perl_startup option, and the configuration or the command line specifies
3917 initializing starting. Note that the global variables are actually called
3918 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3919
3920 #ifdef EXIM_PERL
3921 if (perl_start_option != 0)
3922 opt_perl_at_start = (perl_start_option > 0);
3923 if (opt_perl_at_start && opt_perl_startup != NULL)
3924 {
3925 uschar *errstr;
3926 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3927 if ((errstr = init_perl(opt_perl_startup)))
3928 exim_fail("exim: error in perl_startup code: %s\n", errstr);
3929 opt_perl_started = TRUE;
3930 }
3931 #endif /* EXIM_PERL */
3932
3933 /* Log the arguments of the call if the configuration file said so. This is
3934 a debugging feature for finding out what arguments certain MUAs actually use.
3935 Don't attempt it if logging is disabled, or if listing variables or if
3936 verifying/testing addresses or expansions. */
3937
3938 if ( (debug_selector & D_any || LOGGING(arguments))
3939 && f.really_exim && !list_options && !checking)
3940 {
3941 uschar *p = big_buffer;
3942 Ustrcpy(p, US"cwd= (failed)");
3943
3944 if (!initial_cwd)
3945 p += 13;
3946 else
3947 {
3948 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
3949 p += 4 + Ustrlen(initial_cwd);
3950 /* in case p is near the end and we don't provide enough space for
3951 * string_format to be willing to write. */
3952 *p = '\0';
3953 }
3954
3955 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3956 while (*p) p++;
3957 for (int i = 0; i < argc; i++)
3958 {
3959 int len = Ustrlen(argv[i]);
3960 const uschar *printing;
3961 uschar *quote;
3962 if (p + len + 8 >= big_buffer + big_buffer_size)
3963 {
3964 Ustrcpy(p, US" ...");
3965 log_write(0, LOG_MAIN, "%s", big_buffer);
3966 Ustrcpy(big_buffer, US"...");
3967 p = big_buffer + 3;
3968 }
3969 printing = string_printing(argv[i]);
3970 if (printing[0] == 0) quote = US"\""; else
3971 {
3972 const uschar *pp = printing;
3973 quote = US"";
3974 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3975 }
3976 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3977 (p - big_buffer) - 4), printing, quote);
3978 }
3979
3980 if (LOGGING(arguments))
3981 log_write(0, LOG_MAIN, "%s", big_buffer);
3982 else
3983 debug_printf("%s\n", big_buffer);
3984 }
3985
3986 /* Set the working directory to be the top-level spool directory. We don't rely
3987 on this in the code, which always uses fully qualified names, but it's useful
3988 for core dumps etc. Don't complain if it fails - the spool directory might not
3989 be generally accessible and calls with the -C option (and others) have lost
3990 privilege by now. Before the chdir, we try to ensure that the directory exists.
3991 */
3992
3993 if (Uchdir(spool_directory) != 0)
3994 {
3995 int dummy;
3996 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3997 dummy = /* quieten compiler */ Uchdir(spool_directory);
3998 dummy = dummy; /* yet more compiler quietening, sigh */
3999 }
4000
4001 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4002 alias file. Exim doesn't have such a concept, but this call is screwed into
4003 Sun's YP makefiles. Handle this by calling a configured script, as the real
4004 user who called Exim. The -oA option can be used to pass an argument to the
4005 script. */
4006
4007 if (bi_option)
4008 {
4009 (void)fclose(config_file);
4010 if (bi_command != NULL)
4011 {
4012 int i = 0;
4013 uschar *argv[3];
4014 argv[i++] = bi_command;
4015 if (alias_arg != NULL) argv[i++] = alias_arg;
4016 argv[i++] = NULL;
4017
4018 setgroups(group_count, group_list);
4019 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4020
4021 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4022 (argv[1] == NULL)? US"" : argv[1]);
4023
4024 execv(CS argv[0], (char *const *)argv);
4025 exim_fail("exim: exec failed: %s\n", strerror(errno));
4026 }
4027 else
4028 {
4029 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4030 exit(EXIT_SUCCESS);
4031 }
4032 }
4033
4034 /* We moved the admin/trusted check to be immediately after reading the
4035 configuration file. We leave these prints here to ensure that syslog setup,
4036 logfile setup, and so on has already happened. */
4037
4038 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4039 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4040
4041 /* Only an admin user may start the daemon or force a queue run in the default
4042 configuration, but the queue run restriction can be relaxed. Only an admin
4043 user may request that a message be returned to its sender forthwith. Only an
4044 admin user may specify a debug level greater than D_v (because it might show
4045 passwords, etc. in lookup queries). Only an admin user may request a queue
4046 count. Only an admin user can use the test interface to scan for email
4047 (because Exim will be in the spool dir and able to look at mails). */
4048
4049 if (!f.admin_user)
4050 {
4051 BOOL debugset = (debug_selector & ~D_v) != 0;
4052 if (deliver_give_up || f.daemon_listen || malware_test_file ||
4053 (count_queue && queue_list_requires_admin) ||
4054 (list_queue && queue_list_requires_admin) ||
4055 (queue_interval >= 0 && prod_requires_admin) ||
4056 (debugset && !f.running_in_test_harness))
4057 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4058 }
4059
4060 /* If the real user is not root or the exim uid, the argument for passing
4061 in an open TCP/IP connection for another message is not permitted, nor is
4062 running with the -N option for any delivery action, unless this call to exim is
4063 one that supplied an input message, or we are using a patched exim for
4064 regression testing. */
4065
4066 if (real_uid != root_uid && real_uid != exim_uid &&
4067 (continue_hostname != NULL ||
4068 (f.dont_deliver &&
4069 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4070 )) && !f.running_in_test_harness)
4071 exim_fail("exim: Permission denied\n");
4072
4073 /* If the caller is not trusted, certain arguments are ignored when running for
4074 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4075 Note that authority for performing certain actions on messages is tested in the
4076 queue_action() function. */
4077
4078 if (!f.trusted_caller && !checking)
4079 {
4080 sender_host_name = sender_host_address = interface_address =
4081 sender_ident = received_protocol = NULL;
4082 sender_host_port = interface_port = 0;
4083 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4084