Add comments as to why smtp_log_no_mail() is not called when
[exim.git] / src / src / exim.c
1 /* $Cambridge: exim/src/src/exim.c,v 1.53 2007/01/17 11:29:39 ph10 Exp $ */
2
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
6
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
8 /* See the file NOTICE for conditions of use and distribution. */
9
10
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
13
14
15 #include "exim.h"
16
17
18
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
22
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
30
31 static void *
32 function_store_get(size_t size)
33 {
34 return store_get((int)size);
35 }
36
37 static void
38 function_dummy_free(void *block) { block = block; }
39
40 static void *
41 function_store_malloc(size_t size)
42 {
43 return store_malloc((int)size);
44 }
45
46 static void
47 function_store_free(void *block)
48 {
49 store_free(block);
50 }
51
52
53
54
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
58
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
64
65 Argument:
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
69
70 Returns: pointer to the compiled pattern
71 */
72
73 const pcre *
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
75 {
76 int offset;
77 int options = PCRE_COPT;
78 const pcre *yield;
79 const uschar *error;
80 if (use_malloc)
81 {
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
84 }
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
89 if (yield == NULL)
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
92 return yield;
93 }
94
95
96
97
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
101
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
104
105 Arguments:
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
112
113 Returns: TRUE or FALSE
114 */
115
116 BOOL
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
118 {
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
122 BOOL yield = n >= 0;
123 if (n == 0) n = EXPAND_MAXN + 1;
124 if (yield)
125 {
126 int nn;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
129 {
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
132 }
133 expand_nmax--;
134 }
135 return yield;
136 }
137
138
139
140
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
144
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
149
150 Argument: the signal number (SIGUSR1)
151 Returns: nothing
152 */
153
154 static void
155 usr1_handler(int sig)
156 {
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
159 log_close_all();
160 os_restarting_signal(SIGUSR1, usr1_handler);
161 }
162
163
164
165 /*************************************************
166 * Timeout handler *
167 *************************************************/
168
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
172 re-enables itself.
173
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
178
179 Argument: the signal value (SIGALRM)
180 Returns: nothing
181 */
182
183 void
184 sigalrm_handler(int sig)
185 {
186 sig = sig; /* Keep picky compilers happy */
187 sigalrm_seen = TRUE;
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
189 }
190
191
192
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
196
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
203
204 Argument: an itimerval structure containing the interval
205 Returns: nothing
206 */
207
208 static void
209 milliwait(struct itimerval *itval)
210 {
211 sigset_t sigmask;
212 sigset_t old_sigmask;
213 (void)sigemptyset(&sigmask); /* Empty mask */
214 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
219 (void)sigfillset(&sigmask); /* All signals */
220 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
223 }
224
225
226
227
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
231
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
234 spammers.
235
236 Argument: number of millseconds
237 Returns: nothing
238 */
239
240 void
241 millisleep(int msec)
242 {
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
248 milliwait(&itval);
249 }
250
251
252
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
256
257 /*
258 Arguments:
259 tv1 the first time
260 tv2 the second time
261
262 Returns: -1, 0, or +1
263 */
264
265 int
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
267 {
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
272 return 0;
273 }
274
275
276
277
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
281
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
291
292 Arguments:
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
298
299 Returns: nothing
300 */
301
302 void
303 exim_wait_tick(struct timeval *then_tv, int resolution)
304 {
305 struct timeval now_tv;
306 long int now_true_usec;
307
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
311
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
313 {
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
319
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
324
325 if (itval.it_value.tv_usec < 0)
326 {
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
329 }
330
331 DEBUG(D_transport|D_receive)
332 {
333 if (!running_in_test_harness)
334 {
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
339 }
340 }
341
342 milliwait(&itval);
343 }
344 }
345
346
347
348
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
352
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
355
356 Arguments: format and arguments, as for printf()
357 Returns: nothing
358 */
359
360 void
361 set_process_info(char *format, ...)
362 {
363 int len;
364 va_list ap;
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
371 va_end(ap);
372 }
373
374
375
376
377
378 /*************************************************
379 * Call fopen() with umask 777 and adjust mode *
380 *************************************************/
381
382 /* Exim runs with umask(0) so that files created with open() have the mode that
383 is specified in the open() call. However, there are some files, typically in
384 the spool directory, that are created with fopen(). They end up world-writeable
385 if no precautions are taken. Although the spool directory is not accessible to
386 the world, this is an untidiness. So this is a wrapper function for fopen()
387 that sorts out the mode of the created file.
388
389 Arguments:
390 filename the file name
391 options the fopen() options
392 mode the required mode
393
394 Returns: the fopened FILE or NULL
395 */
396
397 FILE *
398 modefopen(uschar *filename, char *options, mode_t mode)
399 {
400 mode_t saved_umask = umask(0777);
401 FILE *f = Ufopen(filename, options);
402 (void)umask(saved_umask);
403 if (f != NULL) (void)fchmod(fileno(f), mode);
404 return f;
405 }
406
407
408
409
410 /*************************************************
411 * Ensure stdin, stdout, and stderr exist *
412 *************************************************/
413
414 /* Some operating systems grumble if an exec() happens without a standard
415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416 file will be opened and will use these fd values, and then some other bit of
417 code will assume, for example, that it can write error messages to stderr.
418 This function ensures that fds 0, 1, and 2 are open if they do not already
419 exist, by connecting them to /dev/null.
420
421 This function is also used to ensure that std{in,out,err} exist at all times,
422 so that if any library that Exim calls tries to use them, it doesn't crash.
423
424 Arguments: None
425 Returns: Nothing
426 */
427
428 void
429 exim_nullstd(void)
430 {
431 int i;
432 int devnull = -1;
433 struct stat statbuf;
434 for (i = 0; i <= 2; i++)
435 {
436 if (fstat(i, &statbuf) < 0 && errno == EBADF)
437 {
438 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
439 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
440 string_open_failed(errno, "/dev/null"));
441 if (devnull != i) (void)dup2(devnull, i);
442 }
443 }
444 if (devnull > 2) (void)close(devnull);
445 }
446
447
448
449
450 /*************************************************
451 * Close unwanted file descriptors for delivery *
452 *************************************************/
453
454 /* This function is called from a new process that has been forked to deliver
455 an incoming message, either directly, or using exec.
456
457 We want any smtp input streams to be closed in this new process. However, it
458 has been observed that using fclose() here causes trouble. When reading in -bS
459 input, duplicate copies of messages have been seen. The files will be sharing a
460 file pointer with the parent process, and it seems that fclose() (at least on
461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462 least sometimes. Hence we go for closing the underlying file descriptors.
463
464 If TLS is active, we want to shut down the TLS library, but without molesting
465 the parent's SSL connection.
466
467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
468 stderr unless debugging) because the calling process might have set them up as
469 pipes and be waiting for them to close before it waits for the submission
470 process to terminate. If they aren't closed, they hold up the calling process
471 until the initial delivery process finishes, which is not what we want.
472
473 Exception: We do want it for synchronous delivery!
474
475 And notwithstanding all the above, if D_resolver is set, implying resolver
476 debugging, leave stdout open, because that's where the resolver writes its
477 debugging output.
478
479 When we close stderr (which implies we've also closed stdout), we also get rid
480 of any controlling terminal.
481
482 Arguments: None
483 Returns: Nothing
484 */
485
486 static void
487 close_unwanted(void)
488 {
489 if (smtp_input)
490 {
491 #ifdef SUPPORT_TLS
492 tls_close(FALSE); /* Shut down the TLS library */
493 #endif
494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
496 smtp_in = NULL;
497 }
498 else
499 {
500 (void)close(0); /* stdin */
501 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
502 if (debug_selector == 0) /* stderr */
503 {
504 if (!synchronous_delivery)
505 {
506 (void)close(2);
507 log_stderr = NULL;
508 }
509 (void)setsid();
510 }
511 }
512 }
513
514
515
516
517 /*************************************************
518 * Set uid and gid *
519 *************************************************/
520
521 /* This function sets a new uid and gid permanently, optionally calling
522 initgroups() to set auxiliary groups. There are some special cases when running
523 Exim in unprivileged modes. In these situations the effective uid will not be
524 root; if we already have the right effective uid/gid, and don't need to
525 initialize any groups, leave things as they are.
526
527 Arguments:
528 uid the uid
529 gid the gid
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
532
533 Returns: nothing; bombs out on failure
534 */
535
536 void
537 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
538 {
539 uid_t euid = geteuid();
540 gid_t egid = getegid();
541
542 if (euid == root_uid || euid != uid || egid != gid || igflag)
543 {
544 /* At least one OS returns +1 for initgroups failure, so just check for
545 non-zero. */
546
547 if (igflag)
548 {
549 struct passwd *pw = getpwuid(uid);
550 if (pw != NULL)
551 {
552 if (initgroups(pw->pw_name, gid) != 0)
553 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
554 (long int)uid, strerror(errno));
555 }
556 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid);
558 }
559
560 if (setgid(gid) < 0 || setuid(uid) < 0)
561 {
562 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
564 }
565 }
566
567 /* Debugging output included uid/gid and all groups */
568
569 DEBUG(D_uid)
570 {
571 int group_count;
572 gid_t group_list[NGROUPS_MAX];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count = getgroups(NGROUPS_MAX, group_list);
576 debug_printf(" auxiliary group list:");
577 if (group_count > 0)
578 {
579 int i;
580 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
581 }
582 else debug_printf(" <none>");
583 debug_printf("\n");
584 }
585 }
586
587
588
589
590 /*************************************************
591 * Exit point *
592 *************************************************/
593
594 /* Exim exits via this function so that it always clears up any open
595 databases.
596
597 Arguments:
598 rc return code
599
600 Returns: does not return
601 */
602
603 void
604 exim_exit(int rc)
605 {
606 search_tidyup();
607 DEBUG(D_any)
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
610 exit(rc);
611 }
612
613
614
615
616 /*************************************************
617 * Extract port from host address *
618 *************************************************/
619
620 /* Called to extract the port from the values given to -oMa and -oMi.
621 It also checks the syntax of the address, and terminates it before the
622 port data when a port is extracted.
623
624 Argument:
625 address the address, with possible port on the end
626
627 Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
629 */
630
631 static int
632 check_port(uschar *address)
633 {
634 int port = host_address_extract_port(address);
635 if (string_is_ip_address(address, NULL) == 0)
636 {
637 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
638 exit(EXIT_FAILURE);
639 }
640 return port;
641 }
642
643
644
645 /*************************************************
646 * Test/verify an address *
647 *************************************************/
648
649 /* This function is called by the -bv and -bt code. It extracts a working
650 address from a full RFC 822 address. This isn't really necessary per se, but it
651 has the effect of collapsing source routes.
652
653 Arguments:
654 s the address string
655 flags flag bits for verify_address()
656 exit_value to be set for failures
657
658 Returns: nothing
659 */
660
661 static void
662 test_address(uschar *s, int flags, int *exit_value)
663 {
664 int start, end, domain;
665 uschar *parse_error = NULL;
666 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
667 FALSE);
668 if (address == NULL)
669 {
670 fprintf(stdout, "syntax error: %s\n", parse_error);
671 *exit_value = 2;
672 }
673 else
674 {
675 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
676 -1, -1, NULL, NULL, NULL);
677 if (rc == FAIL) *exit_value = 2;
678 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
679 }
680 }
681
682
683
684 /*************************************************
685 * Decode bit settings for log/debug *
686 *************************************************/
687
688 /* This function decodes a string containing bit settings in the form of +name
689 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
690 also recognizes a numeric setting of the form =<number>, but this is not
691 intended for user use. It's an easy way for Exim to pass the debug settings
692 when it is re-exec'ed.
693
694 The log options are held in two unsigned ints (because there became too many
695 for one). The top bit in the table means "put in 2nd selector". This does not
696 yet apply to debug options, so the "=" facility sets only the first selector.
697
698 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
699 It sets all the bits in both selectors. However, there is a facility for then
700 unsetting certain bits, because we want to turn off "memory" in the debug case.
701
702 A bad value for a debug setting is treated as an unknown option - error message
703 to stderr and die. For log settings, which come from the configuration file,
704 we write to the log on the way out...
705
706 Arguments:
707 selector1 address of the first bit string
708 selector2 address of the second bit string, or NULL
709 notall1 bits to exclude from "all" for selector1
710 notall2 bits to exclude from "all" for selector2
711 string the configured string
712 options the table of option names
713 count size of table
714 which "log" or "debug"
715
716 Returns: nothing on success - bomb out on failure
717 */
718
719 static void
720 decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
721 int notall2, uschar *string, bit_table *options, int count, uschar *which)
722 {
723 uschar *errmsg;
724 if (string == NULL) return;
725
726 if (*string == '=')
727 {
728 char *end; /* Not uschar */
729 *selector1 = strtoul(CS string+1, &end, 0);
730 if (*end == 0) return;
731 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
732 string);
733 goto ERROR_RETURN;
734 }
735
736 /* Handle symbolic setting */
737
738 else for(;;)
739 {
740 BOOL adding;
741 uschar *s;
742 int len;
743 bit_table *start, *end;
744
745 while (isspace(*string)) string++;
746 if (*string == 0) return;
747
748 if (*string != '+' && *string != '-')
749 {
750 errmsg = string_sprintf("malformed %s_selector setting: "
751 "+ or - expected but found \"%s\"", which, string);
752 goto ERROR_RETURN;
753 }
754
755 adding = *string++ == '+';
756 s = string;
757 while (isalnum(*string) || *string == '_') string++;
758 len = string - s;
759
760 start = options;
761 end = options + count;
762
763 while (start < end)
764 {
765 bit_table *middle = start + (end - start)/2;
766 int c = Ustrncmp(s, middle->name, len);
767 if (c == 0)
768 {
769 if (middle->name[len] != 0) c = -1; else
770 {
771 unsigned int bit = middle->bit;
772 unsigned int *selector;
773
774 /* The value with all bits set means "force all bits in both selectors"
775 in the case where two are being handled. However, the top bit in the
776 second selector is never set. When setting, some bits can be excluded.
777 */
778
779 if (bit == 0xffffffff)
780 {
781 if (adding)
782 {
783 *selector1 = 0xffffffff ^ notall1;
784 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
785 }
786 else
787 {
788 *selector1 = 0;
789 if (selector2 != NULL) *selector2 = 0;
790 }
791 }
792
793 /* Otherwise, the 0x80000000 bit means "this value, without the top
794 bit, belongs in the second selector". */
795
796 else
797 {
798 if ((bit & 0x80000000) != 0)
799 {
800 selector = selector2;
801 bit &= 0x7fffffff;
802 }
803 else selector = selector1;
804 if (adding) *selector |= bit; else *selector &= ~bit;
805 }
806 break; /* Out of loop to match selector name */
807 }
808 }
809 if (c < 0) end = middle; else start = middle + 1;
810 } /* Loop to match selector name */
811
812 if (start >= end)
813 {
814 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
815 adding? '+' : '-', len, s);
816 goto ERROR_RETURN;
817 }
818 } /* Loop for selector names */
819
820 /* Handle disasters */
821
822 ERROR_RETURN:
823 if (Ustrcmp(which, "debug") == 0)
824 {
825 fprintf(stderr, "exim: %s\n", errmsg);
826 exit(EXIT_FAILURE);
827 }
828 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
829 }
830
831
832
833 /*************************************************
834 * Show supported features *
835 *************************************************/
836
837 /* This function is called for -bV and for -d to output the optional features
838 of the current Exim binary.
839
840 Arguments: a FILE for printing
841 Returns: nothing
842 */
843
844 static void
845 show_whats_supported(FILE *f)
846 {
847 #ifdef DB_VERSION_STRING
848 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
849 #elif defined(BTREEVERSION) && defined(HASHVERSION)
850 #ifdef USE_DB
851 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
852 #else
853 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
854 #endif
855 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
856 fprintf(f, "Probably ndbm\n");
857 #elif defined(USE_TDB)
858 fprintf(f, "Using tdb\n");
859 #else
860 #ifdef USE_GDBM
861 fprintf(f, "Probably GDBM (native mode)\n");
862 #else
863 fprintf(f, "Probably GDBM (compatibility mode)\n");
864 #endif
865 #endif
866
867 fprintf(f, "Support for:");
868 #ifdef SUPPORT_CRYPTEQ
869 fprintf(f, " crypteq");
870 #endif
871 #if HAVE_ICONV
872 fprintf(f, " iconv()");
873 #endif
874 #if HAVE_IPV6
875 fprintf(f, " IPv6");
876 #endif
877 #ifdef HAVE_SETCLASSRESOURCES
878 fprintf(f, " use_setclassresources");
879 #endif
880 #ifdef SUPPORT_PAM
881 fprintf(f, " PAM");
882 #endif
883 #ifdef EXIM_PERL
884 fprintf(f, " Perl");
885 #endif
886 #ifdef EXPAND_DLFUNC
887 fprintf(f, " Expand_dlfunc");
888 #endif
889 #ifdef USE_TCP_WRAPPERS
890 fprintf(f, " TCPwrappers");
891 #endif
892 #ifdef SUPPORT_TLS
893 #ifdef USE_GNUTLS
894 fprintf(f, " GnuTLS");
895 #else
896 fprintf(f, " OpenSSL");
897 #endif
898 #endif
899 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
900 fprintf(f, " translate_ip_address");
901 #endif
902 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
903 fprintf(f, " move_frozen_messages");
904 #endif
905 #ifdef WITH_CONTENT_SCAN
906 fprintf(f, " Content_Scanning");
907 #endif
908 #ifdef WITH_OLD_DEMIME
909 fprintf(f, " Old_Demime");
910 #endif
911 #ifdef EXPERIMENTAL_SPF
912 fprintf(f, " Experimental_SPF");
913 #endif
914 #ifdef EXPERIMENTAL_SRS
915 fprintf(f, " Experimental_SRS");
916 #endif
917 #ifdef EXPERIMENTAL_BRIGHTMAIL
918 fprintf(f, " Experimental_Brightmail");
919 #endif
920 #ifdef EXPERIMENTAL_DOMAINKEYS
921 fprintf(f, " Experimental_DomainKeys");
922 #endif
923 fprintf(f, "\n");
924
925 fprintf(f, "Lookups:");
926 #ifdef LOOKUP_LSEARCH
927 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
928 #endif
929 #ifdef LOOKUP_CDB
930 fprintf(f, " cdb");
931 #endif
932 #ifdef LOOKUP_DBM
933 fprintf(f, " dbm dbmnz");
934 #endif
935 #ifdef LOOKUP_DNSDB
936 fprintf(f, " dnsdb");
937 #endif
938 #ifdef LOOKUP_DSEARCH
939 fprintf(f, " dsearch");
940 #endif
941 #ifdef LOOKUP_IBASE
942 fprintf(f, " ibase");
943 #endif
944 #ifdef LOOKUP_LDAP
945 fprintf(f, " ldap ldapdn ldapm");
946 #endif
947 #ifdef LOOKUP_MYSQL
948 fprintf(f, " mysql");
949 #endif
950 #ifdef LOOKUP_NIS
951 fprintf(f, " nis nis0");
952 #endif
953 #ifdef LOOKUP_NISPLUS
954 fprintf(f, " nisplus");
955 #endif
956 #ifdef LOOKUP_ORACLE
957 fprintf(f, " oracle");
958 #endif
959 #ifdef LOOKUP_PASSWD
960 fprintf(f, " passwd");
961 #endif
962 #ifdef LOOKUP_PGSQL
963 fprintf(f, " pgsql");
964 #endif
965 #ifdef LOOKUP_SQLITE
966 fprintf(f, " sqlite");
967 #endif
968 #ifdef LOOKUP_TESTDB
969 fprintf(f, " testdb");
970 #endif
971 #ifdef LOOKUP_WHOSON
972 fprintf(f, " whoson");
973 #endif
974 fprintf(f, "\n");
975
976 fprintf(f, "Authenticators:");
977 #ifdef AUTH_CRAM_MD5
978 fprintf(f, " cram_md5");
979 #endif
980 #ifdef AUTH_CYRUS_SASL
981 fprintf(f, " cyrus_sasl");
982 #endif
983 #ifdef AUTH_DOVECOT
984 fprintf(f, " dovecot");
985 #endif
986 #ifdef AUTH_PLAINTEXT
987 fprintf(f, " plaintext");
988 #endif
989 #ifdef AUTH_SPA
990 fprintf(f, " spa");
991 #endif
992 fprintf(f, "\n");
993
994 fprintf(f, "Routers:");
995 #ifdef ROUTER_ACCEPT
996 fprintf(f, " accept");
997 #endif
998 #ifdef ROUTER_DNSLOOKUP
999 fprintf(f, " dnslookup");
1000 #endif
1001 #ifdef ROUTER_IPLITERAL
1002 fprintf(f, " ipliteral");
1003 #endif
1004 #ifdef ROUTER_IPLOOKUP
1005 fprintf(f, " iplookup");
1006 #endif
1007 #ifdef ROUTER_MANUALROUTE
1008 fprintf(f, " manualroute");
1009 #endif
1010 #ifdef ROUTER_QUERYPROGRAM
1011 fprintf(f, " queryprogram");
1012 #endif
1013 #ifdef ROUTER_REDIRECT
1014 fprintf(f, " redirect");
1015 #endif
1016 fprintf(f, "\n");
1017
1018 fprintf(f, "Transports:");
1019 #ifdef TRANSPORT_APPENDFILE
1020 fprintf(f, " appendfile");
1021 #ifdef SUPPORT_MAILDIR
1022 fprintf(f, "/maildir");
1023 #endif
1024 #ifdef SUPPORT_MAILSTORE
1025 fprintf(f, "/mailstore");
1026 #endif
1027 #ifdef SUPPORT_MBX
1028 fprintf(f, "/mbx");
1029 #endif
1030 #endif
1031 #ifdef TRANSPORT_AUTOREPLY
1032 fprintf(f, " autoreply");
1033 #endif
1034 #ifdef TRANSPORT_LMTP
1035 fprintf(f, " lmtp");
1036 #endif
1037 #ifdef TRANSPORT_PIPE
1038 fprintf(f, " pipe");
1039 #endif
1040 #ifdef TRANSPORT_SMTP
1041 fprintf(f, " smtp");
1042 #endif
1043 fprintf(f, "\n");
1044
1045 if (fixed_never_users[0] > 0)
1046 {
1047 int i;
1048 fprintf(f, "Fixed never_users: ");
1049 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1050 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1051 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1052 }
1053
1054 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1055 }
1056
1057
1058
1059
1060 /*************************************************
1061 * Quote a local part *
1062 *************************************************/
1063
1064 /* This function is used when a sender address or a From: or Sender: header
1065 line is being created from the caller's login, or from an authenticated_id. It
1066 applies appropriate quoting rules for a local part.
1067
1068 Argument: the local part
1069 Returns: the local part, quoted if necessary
1070 */
1071
1072 uschar *
1073 local_part_quote(uschar *lpart)
1074 {
1075 BOOL needs_quote = FALSE;
1076 int size, ptr;
1077 uschar *yield;
1078 uschar *t;
1079
1080 for (t = lpart; !needs_quote && *t != 0; t++)
1081 {
1082 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1083 (*t != '.' || t == lpart || t[1] == 0);
1084 }
1085
1086 if (!needs_quote) return lpart;
1087
1088 size = ptr = 0;
1089 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1090
1091 for (;;)
1092 {
1093 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1094 if (nq == NULL)
1095 {
1096 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1097 break;
1098 }
1099 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1100 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1101 yield = string_cat(yield, &size, &ptr, nq, 1);
1102 lpart = nq + 1;
1103 }
1104
1105 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1106 yield[ptr] = 0;
1107 return yield;
1108 }
1109
1110
1111
1112 #ifdef USE_READLINE
1113 /*************************************************
1114 * Load readline() functions *
1115 *************************************************/
1116
1117 /* This function is called from testing executions that read data from stdin,
1118 but only when running as the calling user. Currently, only -be does this. The
1119 function loads the readline() function library and passes back the functions.
1120 On some systems, it needs the curses library, so load that too, but try without
1121 it if loading fails. All this functionality has to be requested at build time.
1122
1123 Arguments:
1124 fn_readline_ptr pointer to where to put the readline pointer
1125 fn_addhist_ptr pointer to where to put the addhistory function
1126
1127 Returns: the dlopen handle or NULL on failure
1128 */
1129
1130 static void *
1131 set_readline(char * (**fn_readline_ptr)(char *),
1132 char * (**fn_addhist_ptr)(char *))
1133 {
1134 void *dlhandle;
1135 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1136
1137 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1138 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1139
1140 if (dlhandle != NULL)
1141 {
1142 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1143 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1144 }
1145 else
1146 {
1147 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1148 }
1149
1150 return dlhandle;
1151 }
1152 #endif
1153
1154
1155
1156 /*************************************************
1157 * Get a line from stdin for testing things *
1158 *************************************************/
1159
1160 /* This function is called when running tests that can take a number of lines
1161 of input (for example, -be and -bt). It handles continuations and trailing
1162 spaces. And prompting and a blank line output on eof. If readline() is in use,
1163 the arguments are non-NULL and provide the relevant functions.
1164
1165 Arguments:
1166 fn_readline readline function or NULL
1167 fn_addhist addhist function or NULL
1168
1169 Returns: pointer to dynamic memory, or NULL at end of file
1170 */
1171
1172 static uschar *
1173 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1174 {
1175 int i;
1176 int size = 0;
1177 int ptr = 0;
1178 uschar *yield = NULL;
1179
1180 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1181
1182 for (i = 0;; i++)
1183 {
1184 uschar buffer[1024];
1185 uschar *p, *ss;
1186
1187 #ifdef USE_READLINE
1188 char *readline_line = NULL;
1189 if (fn_readline != NULL)
1190 {
1191 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1192 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1193 p = US readline_line;
1194 }
1195 else
1196 #endif
1197
1198 /* readline() not in use */
1199
1200 {
1201 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1202 p = buffer;
1203 }
1204
1205 /* Handle the line */
1206
1207 ss = p + (int)Ustrlen(p);
1208 while (ss > p && isspace(ss[-1])) ss--;
1209
1210 if (i > 0)
1211 {
1212 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1213 }
1214
1215 yield = string_cat(yield, &size, &ptr, p, ss - p);
1216
1217 #ifdef USE_READLINE
1218 if (fn_readline != NULL) free(readline_line);
1219 #endif
1220
1221 if (ss == p || yield[ptr-1] != '\\')
1222 {
1223 yield[ptr] = 0;
1224 break;
1225 }
1226 yield[--ptr] = 0;
1227 }
1228
1229 if (yield == NULL) printf("\n");
1230 return yield;
1231 }
1232
1233
1234
1235 /*************************************************
1236 * Entry point and high-level code *
1237 *************************************************/
1238
1239 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1240 the appropriate action. All the necessary functions are present in the one
1241 binary. I originally thought one should split it up, but it turns out that so
1242 much of the apparatus is needed in each chunk that one might as well just have
1243 it all available all the time, which then makes the coding easier as well.
1244
1245 Arguments:
1246 argc count of entries in argv
1247 argv argument strings, with argv[0] being the program name
1248
1249 Returns: EXIT_SUCCESS if terminated successfully
1250 EXIT_FAILURE otherwise, except when a message has been sent
1251 to the sender, and -oee was given
1252 */
1253
1254 int
1255 main(int argc, char **cargv)
1256 {
1257 uschar **argv = USS cargv;
1258 int arg_receive_timeout = -1;
1259 int arg_smtp_receive_timeout = -1;
1260 int arg_error_handling = error_handling;
1261 int filter_sfd = -1;
1262 int filter_ufd = -1;
1263 int group_count;
1264 int i;
1265 int list_queue_option = 0;
1266 int msg_action = 0;
1267 int msg_action_arg = -1;
1268 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1269 int queue_only_reason = 0;
1270 #ifdef EXIM_PERL
1271 int perl_start_option = 0;
1272 #endif
1273 int recipients_arg = argc;
1274 int sender_address_domain = 0;
1275 int test_retry_arg = -1;
1276 int test_rewrite_arg = -1;
1277 BOOL arg_queue_only = FALSE;
1278 BOOL bi_option = FALSE;
1279 BOOL checking = FALSE;
1280 BOOL count_queue = FALSE;
1281 BOOL expansion_test = FALSE;
1282 BOOL extract_recipients = FALSE;
1283 BOOL forced_delivery = FALSE;
1284 BOOL f_end_dot = FALSE;
1285 BOOL deliver_give_up = FALSE;
1286 BOOL list_queue = FALSE;
1287 BOOL list_options = FALSE;
1288 BOOL local_queue_only;
1289 BOOL more = TRUE;
1290 BOOL one_msg_action = FALSE;
1291 BOOL queue_only_set = FALSE;
1292 BOOL receiving_message = TRUE;
1293 BOOL sender_ident_set = FALSE;
1294 BOOL unprivileged;
1295 BOOL removed_privilege = FALSE;
1296 BOOL verify_address_mode = FALSE;
1297 BOOL verify_as_sender = FALSE;
1298 BOOL version_printed = FALSE;
1299 uschar *alias_arg = NULL;
1300 uschar *called_as = US"";
1301 uschar *start_queue_run_id = NULL;
1302 uschar *stop_queue_run_id = NULL;
1303 uschar *expansion_test_message = NULL;
1304 uschar *ftest_domain = NULL;
1305 uschar *ftest_localpart = NULL;
1306 uschar *ftest_prefix = NULL;
1307 uschar *ftest_suffix = NULL;
1308 uschar *real_sender_address;
1309 uschar *originator_home = US"/";
1310 void *reset_point;
1311
1312 struct passwd *pw;
1313 struct stat statbuf;
1314 pid_t passed_qr_pid = (pid_t)0;
1315 int passed_qr_pipe = -1;
1316 gid_t group_list[NGROUPS_MAX];
1317
1318 /* Possible options for -R and -S */
1319
1320 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1321
1322 /* Need to define this in case we need to change the environment in order
1323 to get rid of a bogus time zone. We have to make it char rather than uschar
1324 because some OS define it in /usr/include/unistd.h. */
1325
1326 extern char **environ;
1327
1328 /* If the Exim user and/or group and/or the configuration file owner/group were
1329 defined by ref:name at build time, we must now find the actual uid/gid values.
1330 This is a feature to make the lives of binary distributors easier. */
1331
1332 #ifdef EXIM_USERNAME
1333 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1334 {
1335 exim_gid = pw->pw_gid;
1336 }
1337 else
1338 {
1339 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1340 EXIM_USERNAME);
1341 exit(EXIT_FAILURE);
1342 }
1343 #endif
1344
1345 #ifdef EXIM_GROUPNAME
1346 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1347 {
1348 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1349 EXIM_GROUPNAME);
1350 exit(EXIT_FAILURE);
1351 }
1352 #endif
1353
1354 #ifdef CONFIGURE_OWNERNAME
1355 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1356 {
1357 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1358 CONFIGURE_OWNERNAME);
1359 exit(EXIT_FAILURE);
1360 }
1361 #endif
1362
1363 #ifdef CONFIGURE_GROUPNAME
1364 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1365 {
1366 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1367 CONFIGURE_GROUPNAME);
1368 exit(EXIT_FAILURE);
1369 }
1370 #endif
1371
1372 /* In the Cygwin environment, some initialization needs doing. It is fudged
1373 in by means of this macro. */
1374
1375 #ifdef OS_INIT
1376 OS_INIT
1377 #endif
1378
1379 /* Check a field which is patched when we are running Exim within its
1380 testing harness; do a fast initial check, and then the whole thing. */
1381
1382 running_in_test_harness =
1383 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1384
1385 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1386 at the start of a program; however, it seems that some environments do not
1387 follow this. A "strange" locale can affect the formatting of timestamps, so we
1388 make quite sure. */
1389
1390 setlocale(LC_ALL, "C");
1391
1392 /* Set up the default handler for timing using alarm(). */
1393
1394 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1395
1396 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1397 because store_malloc writes a log entry on failure. */
1398
1399 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1400 if (log_buffer == NULL)
1401 {
1402 fprintf(stderr, "exim: failed to get store for log buffer\n");
1403 exit(EXIT_FAILURE);
1404 }
1405
1406 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1407 NULL when the daemon is run and the file is closed. We have to use this
1408 indirection, because some systems don't allow writing to the variable "stderr".
1409 */
1410
1411 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1412
1413 /* Arrange for the PCRE regex library to use our store functions. Note that
1414 the normal calls are actually macros that add additional arguments for
1415 debugging purposes so we have to assign specially constructed functions here.
1416 The default is to use store in the stacking pool, but this is overridden in the
1417 regex_must_compile() function. */
1418
1419 pcre_malloc = function_store_get;
1420 pcre_free = function_dummy_free;
1421
1422 /* Ensure there is a big buffer for temporary use in several places. It is put
1423 in malloc store so that it can be freed for enlargement if necessary. */
1424
1425 big_buffer = store_malloc(big_buffer_size);
1426
1427 /* Set up the handler for the data request signal, and set the initial
1428 descriptive text. */
1429
1430 set_process_info("initializing");
1431 os_restarting_signal(SIGUSR1, usr1_handler);
1432
1433 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1434 in the daemon code. For the rest of Exim's uses, we ignore it. */
1435
1436 signal(SIGHUP, SIG_IGN);
1437
1438 /* We don't want to die on pipe errors as the code is written to handle
1439 the write error instead. */
1440
1441 signal(SIGPIPE, SIG_IGN);
1442
1443 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1444 set to SIG_IGN. This causes subprocesses that complete before the parent
1445 process waits for them not to hang around, so when Exim calls wait(), nothing
1446 is there. The wait() code has been made robust against this, but let's ensure
1447 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1448 ending status. We use sigaction rather than plain signal() on those OS where
1449 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1450 problem on AIX with this.) */
1451
1452 #ifdef SA_NOCLDWAIT
1453 {
1454 struct sigaction act;
1455 act.sa_handler = SIG_DFL;
1456 sigemptyset(&(act.sa_mask));
1457 act.sa_flags = 0;
1458 sigaction(SIGCHLD, &act, NULL);
1459 }
1460 #else
1461 signal(SIGCHLD, SIG_DFL);
1462 #endif
1463
1464 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1465 SIGHUP. */
1466
1467 sighup_argv = argv;
1468
1469 /* Set up the version number. Set up the leading 'E' for the external form of
1470 message ids, set the pointer to the internal form, and initialize it to
1471 indicate no message being processed. */
1472
1473 version_init();
1474 message_id_option[0] = '-';
1475 message_id_external = message_id_option + 1;
1476 message_id_external[0] = 'E';
1477 message_id = message_id_external + 1;
1478 message_id[0] = 0;
1479
1480 /* Set the umask to zero so that any files Exim creates using open() are
1481 created with the modes that it specifies. NOTE: Files created with fopen() have
1482 a problem, which was not recognized till rather late (February 2006). With this
1483 umask, such files will be world writeable. (They are all content scanning files
1484 in the spool directory, which isn't world-accessible, so this is not a
1485 disaster, but it's untidy.) I don't want to change this overall setting,
1486 however, because it will interact badly with the open() calls. Instead, there's
1487 now a function called modefopen() that fiddles with the umask while calling
1488 fopen(). */
1489
1490 (void)umask(0);
1491
1492 /* Precompile the regular expression for matching a message id. Keep this in
1493 step with the code that generates ids in the accept.c module. We need to do
1494 this here, because the -M options check their arguments for syntactic validity
1495 using mac_ismsgid, which uses this. */
1496
1497 regex_ismsgid =
1498 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1499
1500 /* Precompile the regular expression that is used for matching an SMTP error
1501 code, possibly extended, at the start of an error message. Note that the
1502 terminating whitespace character is included. */
1503
1504 regex_smtp_code =
1505 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1506 FALSE, TRUE);
1507
1508 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1509 this seems to be a generally accepted convention, since one finds symbolic
1510 links called "mailq" in standard OS configurations. */
1511
1512 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1513 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1514 {
1515 list_queue = TRUE;
1516 receiving_message = FALSE;
1517 called_as = US"-mailq";
1518 }
1519
1520 /* If the program is called as "rmail" treat it as equivalent to
1521 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1522 i.e. preventing a single dot on a line from terminating the message, and
1523 returning with zero return code, even in cases of error (provided an error
1524 message has been sent). */
1525
1526 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1527 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1528 {
1529 dot_ends = FALSE;
1530 called_as = US"-rmail";
1531 errors_sender_rc = EXIT_SUCCESS;
1532 }
1533
1534 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1535 this is a smail convention. */
1536
1537 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1538 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1539 {
1540 smtp_input = smtp_batched_input = TRUE;
1541 called_as = US"-rsmtp";
1542 }
1543
1544 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1545 this is a smail convention. */
1546
1547 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1548 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1549 {
1550 queue_interval = 0;
1551 receiving_message = FALSE;
1552 called_as = US"-runq";
1553 }
1554
1555 /* If the program is called as "newaliases" treat it as equivalent to
1556 "exim -bi"; this is a sendmail convention. */
1557
1558 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1559 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1560 {
1561 bi_option = TRUE;
1562 receiving_message = FALSE;
1563 called_as = US"-newaliases";
1564 }
1565
1566 /* Save the original effective uid for a couple of uses later. It should
1567 normally be root, but in some esoteric environments it may not be. */
1568
1569 original_euid = geteuid();
1570
1571 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1572 to be the same as the real ones. This makes a difference only if Exim is setuid
1573 (or setgid) to something other than root, which could be the case in some
1574 special configurations. */
1575
1576 real_uid = getuid();
1577 real_gid = getgid();
1578
1579 if (real_uid == root_uid)
1580 {
1581 setgid(real_gid);
1582 setuid(real_uid);
1583 }
1584
1585 /* If neither the original real uid nor the original euid was root, Exim is
1586 running in an unprivileged state. */
1587
1588 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1589
1590 /* If the first argument is --help, pretend there are no arguments. This will
1591 cause a brief message to be given. */
1592
1593 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1594
1595 /* Scan the program's arguments. Some can be dealt with right away; others are
1596 simply recorded for checking and handling afterwards. Do a high-level switch
1597 on the second character (the one after '-'), to save some effort. */
1598
1599 for (i = 1; i < argc; i++)
1600 {
1601 BOOL badarg = FALSE;
1602 uschar *arg = argv[i];
1603 uschar *argrest;
1604 int switchchar;
1605
1606 /* An argument not starting with '-' is the start of a recipients list;
1607 break out of the options-scanning loop. */
1608
1609 if (arg[0] != '-')
1610 {
1611 recipients_arg = i;
1612 break;
1613 }
1614
1615 /* An option consistion of -- terminates the options */
1616
1617 if (Ustrcmp(arg, "--") == 0)
1618 {
1619 recipients_arg = i + 1;
1620 break;
1621 }
1622
1623 /* Handle flagged options */
1624
1625 switchchar = arg[1];
1626 argrest = arg+2;
1627
1628 /* Make all -ex options synonymous with -oex arguments, since that
1629 is assumed by various callers. Also make -qR options synonymous with -R
1630 options, as that seems to be required as well. Allow for -qqR too, and
1631 the same for -S options. */
1632
1633 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1634 Ustrncmp(arg+1, "qR", 2) == 0 ||
1635 Ustrncmp(arg+1, "qS", 2) == 0)
1636 {
1637 switchchar = arg[2];
1638 argrest++;
1639 }
1640 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1641 {
1642 switchchar = arg[3];
1643 argrest += 2;
1644 queue_2stage = TRUE;
1645 }
1646
1647 /* Make -r synonymous with -f, since it is a documented alias */
1648
1649 else if (arg[1] == 'r') switchchar = 'f';
1650
1651 /* Make -ov synonymous with -v */
1652
1653 else if (Ustrcmp(arg, "-ov") == 0)
1654 {
1655 switchchar = 'v';
1656 argrest++;
1657 }
1658
1659 /* High-level switch on active initial letter */
1660
1661 switch(switchchar)
1662 {
1663 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1664 so has no need of it. */
1665
1666 case 'B':
1667 if (*argrest == 0) i++; /* Skip over the type */
1668 break;
1669
1670
1671 case 'b':
1672 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1673
1674 /* -bd: Run in daemon mode, awaiting SMTP connections.
1675 -bdf: Ditto, but in the foreground.
1676 */
1677
1678 if (*argrest == 'd')
1679 {
1680 daemon_listen = TRUE;
1681 if (*(++argrest) == 'f') background_daemon = FALSE;
1682 else if (*argrest != 0) { badarg = TRUE; break; }
1683 }
1684
1685 /* -be: Run in expansion test mode
1686 -bem: Ditto, but read a message from a file first
1687 */
1688
1689 else if (*argrest == 'e')
1690 {
1691 expansion_test = checking = TRUE;
1692 if (argrest[1] == 'm')
1693 {
1694 if (++i >= argc) { badarg = TRUE; break; }
1695 expansion_test_message = argv[i];
1696 argrest++;
1697 }
1698 if (argrest[1] != 0) { badarg = TRUE; break; }
1699 }
1700
1701 /* -bF: Run system filter test */
1702
1703 else if (*argrest == 'F')
1704 {
1705 filter_test |= FTEST_SYSTEM;
1706 if (*(++argrest) != 0) { badarg = TRUE; break; }
1707 if (++i < argc) filter_test_sfile = argv[i]; else
1708 {
1709 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1710 exit(EXIT_FAILURE);
1711 }
1712 }
1713
1714 /* -bf: Run user filter test
1715 -bfd: Set domain for filter testing
1716 -bfl: Set local part for filter testing
1717 -bfp: Set prefix for filter testing
1718 -bfs: Set suffix for filter testing
1719 */
1720
1721 else if (*argrest == 'f')
1722 {
1723 if (*(++argrest) == 0)
1724 {
1725 filter_test |= FTEST_USER;
1726 if (++i < argc) filter_test_ufile = argv[i]; else
1727 {
1728 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1729 exit(EXIT_FAILURE);
1730 }
1731 }
1732 else
1733 {
1734 if (++i >= argc)
1735 {
1736 fprintf(stderr, "exim: string expected after %s\n", arg);
1737 exit(EXIT_FAILURE);
1738 }
1739 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1740 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1741 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1742 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1743 else { badarg = TRUE; break; }
1744 }
1745 }
1746
1747 /* -bh: Host checking - an IP address must follow. */
1748
1749 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1750 {
1751 if (++i >= argc) { badarg = TRUE; break; }
1752 sender_host_address = argv[i];
1753 host_checking = checking = log_testing_mode = TRUE;
1754 host_checking_callout = argrest[1] == 'c';
1755 }
1756
1757 /* -bi: This option is used by sendmail to initialize *the* alias file,
1758 though it has the -oA option to specify a different file. Exim has no
1759 concept of *the* alias file, but since Sun's YP make script calls
1760 sendmail this way, some support must be provided. */
1761
1762 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1763
1764 /* -bm: Accept and deliver message - the default option. Reinstate
1765 receiving_message, which got turned off for all -b options. */
1766
1767 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1768
1769 /* -bnq: For locally originating messages, do not qualify unqualified
1770 addresses. In the envelope, this causes errors; in header lines they
1771 just get left. */
1772
1773 else if (Ustrcmp(argrest, "nq") == 0)
1774 {
1775 allow_unqualified_sender = FALSE;
1776 allow_unqualified_recipient = FALSE;
1777 }
1778
1779 /* -bpxx: List the contents of the mail queue, in various forms. If
1780 the option is -bpc, just a queue count is needed. Otherwise, if the
1781 first letter after p is r, then order is random. */
1782
1783 else if (*argrest == 'p')
1784 {
1785 if (*(++argrest) == 'c')
1786 {
1787 count_queue = TRUE;
1788 if (*(++argrest) != 0) badarg = TRUE;
1789 break;
1790 }
1791
1792 if (*argrest == 'r')
1793 {
1794 list_queue_option = 8;
1795 argrest++;
1796 }
1797 else list_queue_option = 0;
1798
1799 list_queue = TRUE;
1800
1801 /* -bp: List the contents of the mail queue, top-level only */
1802
1803 if (*argrest == 0) {}
1804
1805 /* -bpu: List the contents of the mail queue, top-level undelivered */
1806
1807 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1808
1809 /* -bpa: List the contents of the mail queue, including all delivered */
1810
1811 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1812
1813 /* Unknown after -bp[r] */
1814
1815 else
1816 {
1817 badarg = TRUE;
1818 break;
1819 }
1820 }
1821
1822
1823 /* -bP: List the configuration variables given as the address list.
1824 Force -v, so configuration errors get displayed. */
1825
1826 else if (Ustrcmp(argrest, "P") == 0)
1827 {
1828 list_options = TRUE;
1829 debug_selector |= D_v;
1830 debug_file = stderr;
1831 }
1832
1833 /* -brt: Test retry configuration lookup */
1834
1835 else if (Ustrcmp(argrest, "rt") == 0)
1836 {
1837 test_retry_arg = i + 1;
1838 goto END_ARG;
1839 }
1840
1841 /* -brw: Test rewrite configuration */
1842
1843 else if (Ustrcmp(argrest, "rw") == 0)
1844 {
1845 test_rewrite_arg = i + 1;
1846 goto END_ARG;
1847 }
1848
1849 /* -bS: Read SMTP commands on standard input, but produce no replies -
1850 all errors are reported by sending messages. */
1851
1852 else if (Ustrcmp(argrest, "S") == 0)
1853 smtp_input = smtp_batched_input = receiving_message = TRUE;
1854
1855 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1856 on standard output. */
1857
1858 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1859
1860 /* -bt: address testing mode */
1861
1862 else if (Ustrcmp(argrest, "t") == 0)
1863 address_test_mode = checking = log_testing_mode = TRUE;
1864
1865 /* -bv: verify addresses */
1866
1867 else if (Ustrcmp(argrest, "v") == 0)
1868 verify_address_mode = checking = log_testing_mode = TRUE;
1869
1870 /* -bvs: verify sender addresses */
1871
1872 else if (Ustrcmp(argrest, "vs") == 0)
1873 {
1874 verify_address_mode = checking = log_testing_mode = TRUE;
1875 verify_as_sender = TRUE;
1876 }
1877
1878 /* -bV: Print version string and support details */
1879
1880 else if (Ustrcmp(argrest, "V") == 0)
1881 {
1882 printf("Exim version %s #%s built %s\n", version_string,
1883 version_cnumber, version_date);
1884 printf("%s\n", CS version_copyright);
1885 version_printed = TRUE;
1886 show_whats_supported(stdout);
1887 }
1888
1889 else badarg = TRUE;
1890 break;
1891
1892
1893 /* -C: change configuration file list; ignore if it isn't really
1894 a change! Enforce a prefix check if required. */
1895
1896 case 'C':
1897 if (*argrest == 0)
1898 {
1899 if(++i < argc) argrest = argv[i]; else
1900 { badarg = TRUE; break; }
1901 }
1902 if (Ustrcmp(config_main_filelist, argrest) != 0)
1903 {
1904 #ifdef ALT_CONFIG_PREFIX
1905 int sep = 0;
1906 int len = Ustrlen(ALT_CONFIG_PREFIX);
1907 uschar *list = argrest;
1908 uschar *filename;
1909 while((filename = string_nextinlist(&list, &sep, big_buffer,
1910 big_buffer_size)) != NULL)
1911 {
1912 if ((Ustrlen(filename) < len ||
1913 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1914 Ustrstr(filename, "/../") != NULL) &&
1915 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1916 {
1917 fprintf(stderr, "-C Permission denied\n");
1918 exit(EXIT_FAILURE);
1919 }
1920 }
1921 #endif
1922
1923 config_main_filelist = argrest;
1924 config_changed = TRUE;
1925 }
1926 break;
1927
1928
1929 /* -D: set up a macro definition */
1930
1931 case 'D':
1932 #ifdef DISABLE_D_OPTION
1933 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1934 exit(EXIT_FAILURE);
1935 #else
1936 {
1937 int ptr = 0;
1938 macro_item *mlast = NULL;
1939 macro_item *m;
1940 uschar name[24];
1941 uschar *s = argrest;
1942
1943 while (isspace(*s)) s++;
1944
1945 if (*s < 'A' || *s > 'Z')
1946 {
1947 fprintf(stderr, "exim: macro name set by -D must start with "
1948 "an upper case letter\n");
1949 exit(EXIT_FAILURE);
1950 }
1951
1952 while (isalnum(*s) || *s == '_')
1953 {
1954 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1955 s++;
1956 }
1957 name[ptr] = 0;
1958 if (ptr == 0) { badarg = TRUE; break; }
1959 while (isspace(*s)) s++;
1960 if (*s != 0)
1961 {
1962 if (*s++ != '=') { badarg = TRUE; break; }
1963 while (isspace(*s)) s++;
1964 }
1965
1966 for (m = macros; m != NULL; m = m->next)
1967 {
1968 if (Ustrcmp(m->name, name) == 0)
1969 {
1970 fprintf(stderr, "exim: duplicated -D in command line\n");
1971 exit(EXIT_FAILURE);
1972 }
1973 mlast = m;
1974 }
1975
1976 m = store_get(sizeof(macro_item) + Ustrlen(name));
1977 m->next = NULL;
1978 m->command_line = TRUE;
1979 if (mlast == NULL) macros = m; else mlast->next = m;
1980 Ustrcpy(m->name, name);
1981 m->replacement = string_copy(s);
1982
1983 if (clmacro_count >= MAX_CLMACROS)
1984 {
1985 fprintf(stderr, "exim: too many -D options on command line\n");
1986 exit(EXIT_FAILURE);
1987 }
1988 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1989 m->replacement);
1990 }
1991 #endif
1992 break;
1993
1994 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1995 The latter is now a no-op, retained for compatibility only. If -dd is used,
1996 debugging subprocesses of the daemon is disabled. */
1997
1998 case 'd':
1999 if (Ustrcmp(argrest, "ropcr") == 0)
2000 {
2001 /* drop_cr = TRUE; */
2002 }
2003
2004 /* Use an intermediate variable so that we don't set debugging while
2005 decoding the debugging bits. */
2006
2007 else
2008 {
2009 unsigned int selector = D_default;
2010 debug_selector = 0;
2011 debug_file = NULL;
2012 if (*argrest == 'd')
2013 {
2014 debug_daemon = TRUE;
2015 argrest++;
2016 }
2017 if (*argrest != 0)
2018 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2019 debug_options_count, US"debug");
2020 debug_selector = selector;
2021 }
2022 break;
2023
2024
2025 /* -E: This is a local error message. This option is not intended for
2026 external use at all, but is not restricted to trusted callers because it
2027 does no harm (just suppresses certain error messages) and if Exim is run
2028 not setuid root it won't always be trusted when it generates error
2029 messages using this option. If there is a message id following -E, point
2030 message_reference at it, for logging. */
2031
2032 case 'E':
2033 local_error_message = TRUE;
2034 if (mac_ismsgid(argrest)) message_reference = argrest;
2035 break;
2036
2037
2038 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2039 option, so it looks as if historically the -oex options are also callable
2040 without the leading -o. So we have to accept them. Before the switch,
2041 anything starting -oe has been converted to -e. Exim does not support all
2042 of the sendmail error options. */
2043
2044 case 'e':
2045 if (Ustrcmp(argrest, "e") == 0)
2046 {
2047 arg_error_handling = ERRORS_SENDER;
2048 errors_sender_rc = EXIT_SUCCESS;
2049 }
2050 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2051 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2052 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2053 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2054 else badarg = TRUE;
2055 break;
2056
2057
2058 /* -F: Set sender's full name, used instead of the gecos entry from
2059 the password file. Since users can usually alter their gecos entries,
2060 there's no security involved in using this instead. The data can follow
2061 the -F or be in the next argument. */
2062
2063 case 'F':
2064 if (*argrest == 0)
2065 {
2066 if(++i < argc) argrest = argv[i]; else
2067 { badarg = TRUE; break; }
2068 }
2069 originator_name = argrest;
2070 sender_name_forced = TRUE;
2071 break;
2072
2073
2074 /* -f: Set sender's address - this value is only actually used if Exim is
2075 run by a trusted user, or if untrusted_set_sender is set and matches the
2076 address, except that the null address can always be set by any user. The
2077 test for this happens later, when the value given here is ignored when not
2078 permitted. For an untrusted user, the actual sender is still put in Sender:
2079 if it doesn't match the From: header (unless no_local_from_check is set).
2080 The data can follow the -f or be in the next argument. The -r switch is an
2081 obsolete form of -f but since there appear to be programs out there that
2082 use anything that sendmail has ever supported, better accept it - the
2083 synonymizing is done before the switch above.
2084
2085 At this stage, we must allow domain literal addresses, because we don't
2086 know what the setting of allow_domain_literals is yet. Ditto for trailing
2087 dots and strip_trailing_dot. */
2088
2089 case 'f':
2090 {
2091 int start, end;
2092 uschar *errmess;
2093 if (*argrest == 0)
2094 {
2095 if (i+1 < argc) argrest = argv[++i]; else
2096 { badarg = TRUE; break; }
2097 }
2098 if (*argrest == 0)
2099 {
2100 sender_address = string_sprintf(""); /* Ensure writeable memory */
2101 }
2102 else
2103 {
2104 uschar *temp = argrest + Ustrlen(argrest) - 1;
2105 while (temp >= argrest && isspace(*temp)) temp--;
2106 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2107 allow_domain_literals = TRUE;
2108 strip_trailing_dot = TRUE;
2109 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2110 &sender_address_domain, TRUE);
2111 allow_domain_literals = FALSE;
2112 strip_trailing_dot = FALSE;
2113 if (sender_address == NULL)
2114 {
2115 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2116 return EXIT_FAILURE;
2117 }
2118 }
2119 sender_address_forced = TRUE;
2120 }
2121 break;
2122
2123 /* This is some Sendmail thing which can be ignored */
2124
2125 case 'G':
2126 break;
2127
2128 /* -h: Set the hop count for an incoming message. Exim does not currently
2129 support this; it always computes it by counting the Received: headers.
2130 To put it in will require a change to the spool header file format. */
2131
2132 case 'h':
2133 if (*argrest == 0)
2134 {
2135 if(++i < argc) argrest = argv[i]; else
2136 { badarg = TRUE; break; }
2137 }
2138 if (!isdigit(*argrest)) badarg = TRUE;
2139 break;
2140
2141
2142 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2143 not to be documented for sendmail but mailx (at least) uses it) */
2144
2145 case 'i':
2146 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2147 break;
2148
2149
2150 case 'M':
2151 receiving_message = FALSE;
2152
2153 /* -MC: continue delivery of another message via an existing open
2154 file descriptor. This option is used for an internal call by the
2155 smtp transport when there is a pending message waiting to go to an
2156 address to which it has got a connection. Five subsequent arguments are
2157 required: transport name, host name, IP address, sequence number, and
2158 message_id. Transports may decline to create new processes if the sequence
2159 number gets too big. The channel is stdin. This (-MC) must be the last
2160 argument. There's a subsequent check that the real-uid is privileged.
2161
2162 If we are running in the test harness. delay for a bit, to let the process
2163 that set this one up complete. This makes for repeatability of the logging,
2164 etc. output. */
2165
2166 if (Ustrcmp(argrest, "C") == 0)
2167 {
2168 if (argc != i + 6)
2169 {
2170 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2171 return EXIT_FAILURE;
2172 }
2173
2174 if (msg_action_arg >= 0)
2175 {
2176 fprintf(stderr, "exim: incompatible arguments\n");
2177 return EXIT_FAILURE;
2178 }
2179
2180 continue_transport = argv[++i];
2181 continue_hostname = argv[++i];
2182 continue_host_address = argv[++i];
2183 continue_sequence = Uatoi(argv[++i]);
2184 msg_action = MSG_DELIVER;
2185 msg_action_arg = ++i;
2186 forced_delivery = TRUE;
2187 queue_run_pid = passed_qr_pid;
2188 queue_run_pipe = passed_qr_pipe;
2189
2190 if (!mac_ismsgid(argv[i]))
2191 {
2192 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2193 argv[i]);
2194 return EXIT_FAILURE;
2195 }
2196
2197 if (running_in_test_harness) millisleep(500);
2198 break;
2199 }
2200
2201 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2202 precedes -MC (see above). The flag indicates that the host to which
2203 Exim is connected has accepted an AUTH sequence. */
2204
2205 else if (Ustrcmp(argrest, "CA") == 0)
2206 {
2207 smtp_authenticated = TRUE;
2208 break;
2209 }
2210
2211 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2212 it preceded -MC (see above) */
2213
2214 else if (Ustrcmp(argrest, "CP") == 0)
2215 {
2216 smtp_use_pipelining = TRUE;
2217 break;
2218 }
2219
2220 /* -MCQ: pass on the pid of the queue-running process that started
2221 this chain of deliveries and the fd of its synchronizing pipe; this
2222 is useful only when it precedes -MC (see above) */
2223
2224 else if (Ustrcmp(argrest, "CQ") == 0)
2225 {
2226 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2227 else badarg = TRUE;
2228 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2229 else badarg = TRUE;
2230 break;
2231 }
2232
2233 /* -MCS: set the smtp_use_size flag; this is useful only when it
2234 precedes -MC (see above) */
2235
2236 else if (Ustrcmp(argrest, "CS") == 0)
2237 {
2238 smtp_use_size = TRUE;
2239 break;
2240 }
2241
2242 /* -MCT: set the tls_offered flag; this is useful only when it
2243 precedes -MC (see above). The flag indicates that the host to which
2244 Exim is connected has offered TLS support. */
2245
2246 #ifdef SUPPORT_TLS
2247 else if (Ustrcmp(argrest, "CT") == 0)
2248 {
2249 tls_offered = TRUE;
2250 break;
2251 }
2252 #endif
2253
2254 /* -M[x]: various operations on the following list of message ids:
2255 -M deliver the messages, ignoring next retry times and thawing
2256 -Mc deliver the messages, checking next retry times, no thawing
2257 -Mf freeze the messages
2258 -Mg give up on the messages
2259 -Mt thaw the messages
2260 -Mrm remove the messages
2261 In the above cases, this must be the last option. There are also the
2262 following options which are followed by a single message id, and which
2263 act on that message. Some of them use the "recipient" addresses as well.
2264 -Mar add recipient(s)
2265 -Mmad mark all recipients delivered
2266 -Mmd mark recipients(s) delivered
2267 -Mes edit sender
2268 -Mset load a message for use with -be
2269 -Mvb show body
2270 -Mvh show header
2271 -Mvl show log
2272 */
2273
2274 else if (*argrest == 0)
2275 {
2276 msg_action = MSG_DELIVER;
2277 forced_delivery = deliver_force_thaw = TRUE;
2278 }
2279 else if (Ustrcmp(argrest, "ar") == 0)
2280 {
2281 msg_action = MSG_ADD_RECIPIENT;
2282 one_msg_action = TRUE;
2283 }
2284 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2285 else if (Ustrcmp(argrest, "es") == 0)
2286 {
2287 msg_action = MSG_EDIT_SENDER;
2288 one_msg_action = TRUE;
2289 }
2290 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2291 else if (Ustrcmp(argrest, "g") == 0)
2292 {
2293 msg_action = MSG_DELIVER;
2294 deliver_give_up = TRUE;
2295 }
2296 else if (Ustrcmp(argrest, "mad") == 0)
2297 {
2298 msg_action = MSG_MARK_ALL_DELIVERED;
2299 }
2300 else if (Ustrcmp(argrest, "md") == 0)
2301 {
2302 msg_action = MSG_MARK_DELIVERED;
2303 one_msg_action = TRUE;
2304 }
2305 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2306 else if (Ustrcmp(argrest, "set") == 0)
2307 {
2308 msg_action = MSG_LOAD;
2309 one_msg_action = TRUE;
2310 }
2311 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2312 else if (Ustrcmp(argrest, "vb") == 0)
2313 {
2314 msg_action = MSG_SHOW_BODY;
2315 one_msg_action = TRUE;
2316 }
2317 else if (Ustrcmp(argrest, "vh") == 0)
2318 {
2319 msg_action = MSG_SHOW_HEADER;
2320 one_msg_action = TRUE;
2321 }
2322 else if (Ustrcmp(argrest, "vl") == 0)
2323 {
2324 msg_action = MSG_SHOW_LOG;
2325 one_msg_action = TRUE;
2326 }
2327 else { badarg = TRUE; break; }
2328
2329 /* All the -Mxx options require at least one message id. */
2330
2331 msg_action_arg = i + 1;
2332 if (msg_action_arg >= argc)
2333 {
2334 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2335 return EXIT_FAILURE;
2336 }
2337
2338 /* Some require only message ids to follow */
2339
2340 if (!one_msg_action)
2341 {
2342 int j;
2343 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2344 {
2345 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2346 argv[j], arg);
2347 return EXIT_FAILURE;
2348 }
2349 goto END_ARG; /* Remaining args are ids */
2350 }
2351
2352 /* Others require only one message id, possibly followed by addresses,
2353 which will be handled as normal arguments. */
2354
2355 else
2356 {
2357 if (!mac_ismsgid(argv[msg_action_arg]))
2358 {
2359 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2360 argv[msg_action_arg], arg);
2361 return EXIT_FAILURE;
2362 }
2363 i++;
2364 }
2365 break;
2366
2367
2368 /* Some programs seem to call the -om option without the leading o;
2369 for sendmail it askes for "me too". Exim always does this. */
2370
2371 case 'm':
2372 if (*argrest != 0) badarg = TRUE;
2373 break;
2374
2375
2376 /* -N: don't do delivery - a debugging option that stops transports doing
2377 their thing. It implies debugging at the D_v level. */
2378
2379 case 'N':
2380 if (*argrest == 0)
2381 {
2382 dont_deliver = TRUE;
2383 debug_selector |= D_v;
2384 debug_file = stderr;
2385 }
2386 else badarg = TRUE;
2387 break;
2388
2389
2390 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2391 it. */
2392
2393 case 'n':
2394 break;
2395
2396 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2397 option to the specified value. This form uses long names. We need to handle
2398 -O option=value and -Ooption=value. */
2399
2400 case 'O':
2401 if (*argrest == 0)
2402 {
2403 if (++i >= argc)
2404 {
2405 fprintf(stderr, "exim: string expected after -O\n");
2406 exit(EXIT_FAILURE);
2407 }
2408 }
2409 break;
2410
2411 case 'o':
2412
2413 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2414 file" option). */
2415
2416 if (*argrest == 'A')
2417 {
2418 alias_arg = argrest + 1;
2419 if (alias_arg[0] == 0)
2420 {
2421 if (i+1 < argc) alias_arg = argv[++i]; else
2422 {
2423 fprintf(stderr, "exim: string expected after -oA\n");
2424 exit(EXIT_FAILURE);
2425 }
2426 }
2427 }
2428
2429 /* -oB: Set a connection message max value for remote deliveries */
2430
2431 else if (*argrest == 'B')
2432 {
2433 uschar *p = argrest + 1;
2434 if (p[0] == 0)
2435 {
2436 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2437 {
2438 connection_max_messages = 1;
2439 p = NULL;
2440 }
2441 }
2442
2443 if (p != NULL)
2444 {
2445 if (!isdigit(*p))
2446 {
2447 fprintf(stderr, "exim: number expected after -oB\n");
2448 exit(EXIT_FAILURE);
2449 }
2450 connection_max_messages = Uatoi(p);
2451 }
2452 }
2453
2454 /* -odb: background delivery */
2455
2456 else if (Ustrcmp(argrest, "db") == 0)
2457 {
2458 synchronous_delivery = FALSE;
2459 arg_queue_only = FALSE;
2460 queue_only_set = TRUE;
2461 }
2462
2463 /* -odf: foreground delivery (smail-compatible option); same effect as
2464 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2465 */
2466
2467 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2468 {
2469 synchronous_delivery = TRUE;
2470 arg_queue_only = FALSE;
2471 queue_only_set = TRUE;
2472 }
2473
2474 /* -odq: queue only */
2475
2476 else if (Ustrcmp(argrest, "dq") == 0)
2477 {
2478 synchronous_delivery = FALSE;
2479 arg_queue_only = TRUE;
2480 queue_only_set = TRUE;
2481 }
2482
2483 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2484 but no remote delivery */
2485
2486 else if (Ustrcmp(argrest, "dqs") == 0)
2487 {
2488 queue_smtp = TRUE;
2489 arg_queue_only = FALSE;
2490 queue_only_set = TRUE;
2491 }
2492
2493 /* -oex: Sendmail error flags. As these are also accepted without the
2494 leading -o prefix, for compatibility with vacation and other callers,
2495 they are handled with -e above. */
2496
2497 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2498 -oitrue: Another sendmail syntax for the same */
2499
2500 else if (Ustrcmp(argrest, "i") == 0 ||
2501 Ustrcmp(argrest, "itrue") == 0)
2502 dot_ends = FALSE;
2503
2504 /* -oM*: Set various characteristics for an incoming message; actually
2505 acted on for trusted callers only. */
2506
2507 else if (*argrest == 'M')
2508 {
2509 if (i+1 >= argc)
2510 {
2511 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2512 exit(EXIT_FAILURE);
2513 }
2514
2515 /* -oMa: Set sender host address */
2516
2517 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2518
2519 /* -oMaa: Set authenticator name */
2520
2521 else if (Ustrcmp(argrest, "Maa") == 0)
2522 sender_host_authenticated = argv[++i];
2523
2524 /* -oMas: setting authenticated sender */
2525
2526 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2527
2528 /* -oMai: setting authenticated id */
2529
2530 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2531
2532 /* -oMi: Set incoming interface address */
2533
2534 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2535
2536 /* -oMr: Received protocol */
2537
2538 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2539
2540 /* -oMs: Set sender host name */
2541
2542 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2543
2544 /* -oMt: Set sender ident */
2545
2546 else if (Ustrcmp(argrest, "Mt") == 0)
2547 {
2548 sender_ident_set = TRUE;
2549 sender_ident = argv[++i];
2550 }
2551
2552 /* Else a bad argument */
2553
2554 else
2555 {
2556 badarg = TRUE;
2557 break;
2558 }
2559 }
2560
2561 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2562 seem to call this as -m (undocumented), so that is also accepted (see
2563 above). */
2564
2565 else if (Ustrcmp(argrest, "m") == 0) {}
2566
2567 /* -oo: An ancient flag for old-style addresses which still seems to
2568 crop up in some calls (see in SCO). */
2569
2570 else if (Ustrcmp(argrest, "o") == 0) {}
2571
2572 /* -oP <name>: set pid file path for daemon */
2573
2574 else if (Ustrcmp(argrest, "P") == 0)
2575 override_pid_file_path = argv[++i];
2576
2577 /* -or <n>: set timeout for non-SMTP acceptance
2578 -os <n>: set timeout for SMTP acceptance */
2579
2580 else if (*argrest == 'r' || *argrest == 's')
2581 {
2582 int *tp = (*argrest == 'r')?
2583 &arg_receive_timeout : &arg_smtp_receive_timeout;
2584 if (argrest[1] == 0)
2585 {
2586 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2587 }
2588 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2589 if (*tp < 0)
2590 {
2591 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2592 exit(EXIT_FAILURE);
2593 }
2594 }
2595
2596 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2597
2598 else if (Ustrcmp(argrest, "X") == 0)
2599 override_local_interfaces = argv[++i];
2600
2601 /* Unknown -o argument */
2602
2603 else badarg = TRUE;
2604 break;
2605
2606
2607 /* -ps: force Perl startup; -pd force delayed Perl startup */
2608
2609 case 'p':
2610 #ifdef EXIM_PERL
2611 if (*argrest == 's' && argrest[1] == 0)
2612 {
2613 perl_start_option = 1;
2614 break;
2615 }
2616 if (*argrest == 'd' && argrest[1] == 0)
2617 {
2618 perl_start_option = -1;
2619 break;
2620 }
2621 #endif
2622
2623 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2624 which sets the host protocol and host name */
2625
2626 if (*argrest == 0)
2627 {
2628 if (i+1 < argc) argrest = argv[++i]; else
2629 { badarg = TRUE; break; }
2630 }
2631
2632 if (*argrest != 0)
2633 {
2634 uschar *hn = Ustrchr(argrest, ':');
2635 if (hn == NULL)
2636 {
2637 received_protocol = argrest;
2638 }
2639 else
2640 {
2641 received_protocol = string_copyn(argrest, hn - argrest);
2642 sender_host_name = hn + 1;
2643 }
2644 }
2645 break;
2646
2647
2648 case 'q':
2649 receiving_message = FALSE;
2650 if (queue_interval >= 0)
2651 {
2652 fprintf(stderr, "exim: -q specified more than once\n");
2653 exit(EXIT_FAILURE);
2654 }
2655
2656 /* -qq...: Do queue runs in a 2-stage manner */
2657
2658 if (*argrest == 'q')
2659 {
2660 queue_2stage = TRUE;
2661 argrest++;
2662 }
2663
2664 /* -qi...: Do only first (initial) deliveries */
2665
2666 if (*argrest == 'i')
2667 {
2668 queue_run_first_delivery = TRUE;
2669 argrest++;
2670 }
2671
2672 /* -qf...: Run the queue, forcing deliveries
2673 -qff..: Ditto, forcing thawing as well */
2674
2675 if (*argrest == 'f')
2676 {
2677 queue_run_force = TRUE;
2678 if (*(++argrest) == 'f')
2679 {
2680 deliver_force_thaw = TRUE;
2681 argrest++;
2682 }
2683 }
2684
2685 /* -q[f][f]l...: Run the queue only on local deliveries */
2686
2687 if (*argrest == 'l')
2688 {
2689 queue_run_local = TRUE;
2690 argrest++;
2691 }
2692
2693 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2694 optionally starting from a given message id. */
2695
2696 if (*argrest == 0 &&
2697 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2698 {
2699 queue_interval = 0;
2700 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2701 start_queue_run_id = argv[++i];
2702 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2703 stop_queue_run_id = argv[++i];
2704 }
2705
2706 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2707 optionally local only. */
2708
2709 else
2710 {
2711 if (*argrest != 0)
2712 queue_interval = readconf_readtime(argrest, 0, FALSE);
2713 else
2714 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2715 if (queue_interval <= 0)
2716 {
2717 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2718 exit(EXIT_FAILURE);
2719 }
2720 }
2721 break;
2722
2723
2724 case 'R': /* Synonymous with -qR... */
2725 receiving_message = FALSE;
2726
2727 /* -Rf: As -R (below) but force all deliveries,
2728 -Rff: Ditto, but also thaw all frozen messages,
2729 -Rr: String is regex
2730 -Rrf: Regex and force
2731 -Rrff: Regex and force and thaw
2732
2733 in all cases provided there are no further characters in this
2734 argument. */
2735
2736 if (*argrest != 0)
2737 {
2738 int i;
2739 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2740 {
2741 if (Ustrcmp(argrest, rsopts[i]) == 0)
2742 {
2743 if (i != 2) queue_run_force = TRUE;
2744 if (i >= 2) deliver_selectstring_regex = TRUE;
2745 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2746 argrest += Ustrlen(rsopts[i]);
2747 }
2748 }
2749 }
2750
2751 /* -R: Set string to match in addresses for forced queue run to
2752 pick out particular messages. */
2753
2754 if (*argrest == 0)
2755 {
2756 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2757 {
2758 fprintf(stderr, "exim: string expected after -R\n");
2759 exit(EXIT_FAILURE);
2760 }
2761 }
2762 else deliver_selectstring = argrest;
2763 break;
2764
2765
2766 /* -r: an obsolete synonym for -f (see above) */
2767
2768
2769 /* -S: Like -R but works on sender. */
2770
2771 case 'S': /* Synonymous with -qS... */
2772 receiving_message = FALSE;
2773
2774 /* -Sf: As -S (below) but force all deliveries,
2775 -Sff: Ditto, but also thaw all frozen messages,
2776 -Sr: String is regex
2777 -Srf: Regex and force
2778 -Srff: Regex and force and thaw
2779
2780 in all cases provided there are no further characters in this
2781 argument. */
2782
2783 if (*argrest != 0)
2784 {
2785 int i;
2786 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2787 {
2788 if (Ustrcmp(argrest, rsopts[i]) == 0)
2789 {
2790 if (i != 2) queue_run_force = TRUE;
2791 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2792 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2793 argrest += Ustrlen(rsopts[i]);
2794 }
2795 }
2796 }
2797
2798 /* -S: Set string to match in addresses for forced queue run to
2799 pick out particular messages. */
2800
2801 if (*argrest == 0)
2802 {
2803 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2804 {
2805 fprintf(stderr, "exim: string expected after -S\n");
2806 exit(EXIT_FAILURE);
2807 }
2808 }
2809 else deliver_selectstring_sender = argrest;
2810 break;
2811
2812 /* -Tqt is an option that is exclusively for use by the testing suite.
2813 It is not recognized in other circumstances. It allows for the setting up
2814 of explicit "queue times" so that various warning/retry things can be
2815 tested. Otherwise variability of clock ticks etc. cause problems. */
2816
2817 case 'T':
2818 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2819 fudged_queue_times = argv[++i];
2820 else badarg = TRUE;
2821 break;
2822
2823
2824 /* -t: Set flag to extract recipients from body of message. */
2825
2826 case 't':
2827 if (*argrest == 0) extract_recipients = TRUE;
2828
2829 /* -ti: Set flag to extract recipients from body of message, and also
2830 specify that dot does not end the message. */
2831
2832 else if (Ustrcmp(argrest, "i") == 0)
2833 {
2834 extract_recipients = TRUE;
2835 dot_ends = FALSE;
2836 }
2837
2838 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2839
2840 #ifdef SUPPORT_TLS
2841 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2842 #endif
2843
2844 else badarg = TRUE;
2845 break;
2846
2847
2848 /* -U: This means "initial user submission" in sendmail, apparently. The
2849 doc claims that in future sendmail may refuse syntactically invalid
2850 messages instead of fixing them. For the moment, we just ignore it. */
2851
2852 case 'U':
2853 break;
2854
2855
2856 /* -v: verify things - this is a very low-level debugging */
2857
2858 case 'v':
2859 if (*argrest == 0)
2860 {
2861 debug_selector |= D_v;
2862 debug_file = stderr;
2863 }
2864 else badarg = TRUE;
2865 break;
2866
2867
2868 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2869
2870 The -x flag tells the sendmail command that mail from a local
2871 mail program has National Language Support (NLS) extended characters
2872 in the body of the mail item. The sendmail command can send mail with
2873 extended NLS characters across networks that normally corrupts these
2874 8-bit characters.
2875
2876 As Exim is 8-bit clean, it just ignores this flag. */
2877
2878 case 'x':
2879 if (*argrest != 0) badarg = TRUE;
2880 break;
2881
2882 /* All other initial characters are errors */
2883
2884 default:
2885 badarg = TRUE;
2886 break;
2887 } /* End of high-level switch statement */
2888
2889 /* Failed to recognize the option, or syntax error */
2890
2891 if (badarg)
2892 {
2893 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2894 "option %s\n", arg);
2895 exit(EXIT_FAILURE);
2896 }
2897 }
2898
2899
2900 /* If -R or -S have been specified without -q, assume a single queue run. */
2901
2902 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2903 queue_interval < 0) queue_interval = 0;
2904
2905
2906 /* Arguments have been processed. Check for incompatibilities. */
2907
2908 END_ARG:
2909 if ((
2910 (smtp_input || extract_recipients || recipients_arg < argc) &&
2911 (daemon_listen || queue_interval >= 0 || bi_option ||
2912 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2913 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2914 ) ||
2915 (
2916 msg_action_arg > 0 &&
2917 (daemon_listen || queue_interval >= 0 || list_options ||
2918 (checking && msg_action != MSG_LOAD) ||
2919 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2920 ) ||
2921 (
2922 (daemon_listen || queue_interval >= 0) &&
2923 (sender_address != NULL || list_options || list_queue || checking ||
2924 bi_option)
2925 ) ||
2926 (
2927 daemon_listen && queue_interval == 0
2928 ) ||
2929 (
2930 list_options &&
2931 (checking || smtp_input || extract_recipients ||
2932 filter_test != FTEST_NONE || bi_option)
2933 ) ||
2934 (
2935 verify_address_mode &&
2936 (address_test_mode || smtp_input || extract_recipients ||
2937 filter_test != FTEST_NONE || bi_option)
2938 ) ||
2939 (
2940 address_test_mode && (smtp_input || extract_recipients ||
2941 filter_test != FTEST_NONE || bi_option)
2942 ) ||
2943 (
2944 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
2945 extract_recipients)
2946 ) ||
2947 (
2948 deliver_selectstring != NULL && queue_interval < 0
2949 ) ||
2950 (
2951 msg_action == MSG_LOAD &&
2952 (!expansion_test || expansion_test_message != NULL)
2953 )
2954 )
2955 {
2956 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2957 exit(EXIT_FAILURE);
2958 }
2959
2960 /* If debugging is set up, set the file and the file descriptor to pass on to
2961 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2962 to run in the foreground. */
2963
2964 if (debug_selector != 0)
2965 {
2966 debug_file = stderr;
2967 debug_fd = fileno(debug_file);
2968 background_daemon = FALSE;
2969 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2970 if (debug_selector != D_v) /* -v only doesn't show this */
2971 {
2972 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2973 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2974 debug_selector);
2975 show_whats_supported(stderr);
2976 }
2977 }
2978
2979 /* When started with root privilege, ensure that the limits on the number of
2980 open files and the number of processes (where that is accessible) are
2981 sufficiently large, or are unset, in case Exim has been called from an
2982 environment where the limits are screwed down. Not all OS have the ability to
2983 change some of these limits. */
2984
2985 if (unprivileged)
2986 {
2987 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2988 }
2989 else
2990 {
2991 struct rlimit rlp;
2992
2993 #ifdef RLIMIT_NOFILE
2994 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2995 {
2996 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2997 strerror(errno));
2998 rlp.rlim_cur = rlp.rlim_max = 0;
2999 }
3000
3001 /* I originally chose 1000 as a nice big number that was unlikely to
3002 be exceeded. It turns out that some older OS have a fixed upper limit of
3003 256. */
3004
3005 if (rlp.rlim_cur < 1000)
3006 {
3007 rlp.rlim_cur = rlp.rlim_max = 1000;
3008 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3009 {
3010 rlp.rlim_cur = rlp.rlim_max = 256;
3011 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3012 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3013 strerror(errno));
3014 }
3015 }
3016 #endif
3017
3018 #ifdef RLIMIT_NPROC
3019 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3020 {
3021 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3022 strerror(errno));
3023 rlp.rlim_cur = rlp.rlim_max = 0;
3024 }
3025
3026 #ifdef RLIM_INFINITY
3027 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3028 {
3029 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3030 #else
3031 if (rlp.rlim_cur < 1000)
3032 {
3033 rlp.rlim_cur = rlp.rlim_max = 1000;
3034 #endif
3035 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3036 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3037 strerror(errno));
3038 }
3039 #endif
3040 }
3041
3042 /* Exim is normally entered as root (but some special configurations are
3043 possible that don't do this). However, it always spins off sub-processes that
3044 set their uid and gid as required for local delivery. We don't want to pass on
3045 any extra groups that root may belong to, so we want to get rid of them all at
3046 this point.
3047
3048 We need to obey setgroups() at this stage, before possibly giving up root
3049 privilege for a changed configuration file, but later on we might need to
3050 check on the additional groups for the admin user privilege - can't do that
3051 till after reading the config, which might specify the exim gid. Therefore,
3052 save the group list here first. */
3053
3054 group_count = getgroups(NGROUPS_MAX, group_list);
3055
3056 /* There is a fundamental difference in some BSD systems in the matter of
3057 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3058 known not to be different. On the "different" systems there is a single group
3059 list, and the first entry in it is the current group. On all other versions of
3060 Unix there is a supplementary group list, which is in *addition* to the current
3061 group. Consequently, to get rid of all extraneous groups on a "standard" system
3062 you pass over 0 groups to setgroups(), while on a "different" system you pass
3063 over a single group - the current group, which is always the first group in the
3064 list. Calling setgroups() with zero groups on a "different" system results in
3065 an error return. The following code should cope with both types of system.
3066
3067 However, if this process isn't running as root, setgroups() can't be used
3068 since you have to be root to run it, even if throwing away groups. Not being
3069 root here happens only in some unusual configurations. We just ignore the
3070 error. */
3071
3072 if (setgroups(0, NULL) != 0)
3073 {
3074 if (setgroups(1, group_list) != 0 && !unprivileged)
3075 {
3076 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3077 exit(EXIT_FAILURE);
3078 }
3079 }
3080
3081 /* If the configuration file name has been altered by an argument on the
3082 command line (either a new file name or a macro definition) and the caller is
3083 not root or the exim user, or if this is a filter testing run, remove any
3084 setuid privilege the program has, and run as the underlying user.
3085
3086 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3087 severely restricts the use of -C for some purposes.
3088
3089 Otherwise, set the real ids to the effective values (should be root unless run
3090 from inetd, which it can either be root or the exim uid, if one is configured).
3091
3092 There is a private mechanism for bypassing some of this, in order to make it
3093 possible to test lots of configurations automatically, without having either to
3094 recompile each time, or to patch in an actual configuration file name and other
3095 values (such as the path name). If running in the test harness, pretend that
3096 configuration file changes and macro definitions haven't happened. */
3097
3098 if (( /* EITHER */
3099 (config_changed || macros != NULL) && /* Config changed, and */
3100 real_uid != root_uid && /* Not root, and */
3101 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3102 real_uid != exim_uid && /* Not exim, and */
3103 #endif
3104 !running_in_test_harness /* Not fudged */
3105 ) || /* OR */
3106 expansion_test /* expansion testing */
3107 || /* OR */
3108 filter_test != FTEST_NONE) /* Filter testing */
3109 {
3110 setgroups(group_count, group_list);
3111 exim_setugid(real_uid, real_gid, FALSE,
3112 US"-C, -D, -be or -bf forces real uid");
3113 removed_privilege = TRUE;
3114
3115 /* In the normal case when Exim is called like this, stderr is available
3116 and should be used for any logging information because attempts to write
3117 to the log will usually fail. To arrange this, we unset really_exim. However,
3118 if no stderr is available there is no point - we might as well have a go
3119 at the log (if it fails, syslog will be written). */
3120
3121 if (log_stderr != NULL) really_exim = FALSE;
3122 }
3123
3124 /* Privilege is to be retained for the moment. It may be dropped later,
3125 depending on the job that this Exim process has been asked to do. For now, set
3126 the real uid to the effective so that subsequent re-execs of Exim are done by a
3127 privileged user. */
3128
3129 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3130
3131 /* If testing a filter, open the file(s) now, before wasting time doing other
3132 setups and reading the message. */
3133
3134 if ((filter_test & FTEST_SYSTEM) != 0)
3135 {
3136 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3137 if (filter_sfd < 0)
3138 {
3139 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3140 strerror(errno));
3141 return EXIT_FAILURE;
3142 }
3143 }
3144
3145 if ((filter_test & FTEST_USER) != 0)
3146 {
3147 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3148 if (filter_ufd < 0)
3149 {
3150 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3151 strerror(errno));
3152 return EXIT_FAILURE;
3153 }
3154 }
3155
3156 /* Read the main runtime configuration data; this gives up if there
3157 is a failure. It leaves the configuration file open so that the subsequent
3158 configuration data for delivery can be read if needed. */
3159
3160 readconf_main();
3161
3162 /* Handle the decoding of logging options. */
3163
3164 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3165 log_options, log_options_count, US"log");
3166
3167 DEBUG(D_any)
3168 {
3169 debug_printf("configuration file is %s\n", config_main_filename);
3170 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3171 log_extra_selector);
3172 }
3173
3174 /* If domain literals are not allowed, check the sender address that was
3175 supplied with -f. Ditto for a stripped trailing dot. */
3176
3177 if (sender_address != NULL)
3178 {
3179 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3180 {
3181 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3182 "allowed\n", sender_address);
3183 return EXIT_FAILURE;
3184 }
3185 if (f_end_dot && !strip_trailing_dot)
3186 {
3187 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3188 "(trailing dot not allowed)\n", sender_address);
3189 return EXIT_FAILURE;
3190 }
3191 }
3192
3193 /* Paranoia check of maximum lengths of certain strings. There is a check
3194 on the length of the log file path in log.c, which will come into effect
3195 if there are any calls to write the log earlier than this. However, if we
3196 get this far but the string is very long, it is better to stop now than to
3197 carry on and (e.g.) receive a message and then have to collapse. The call to
3198 log_write() from here will cause the ultimate panic collapse if the complete
3199 file name exceeds the buffer length. */
3200
3201 if (Ustrlen(log_file_path) > 200)
3202 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3203 "log_file_path is longer than 200 chars: aborting");
3204
3205 if (Ustrlen(pid_file_path) > 200)
3206 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3207 "pid_file_path is longer than 200 chars: aborting");
3208
3209 if (Ustrlen(spool_directory) > 200)
3210 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3211 "spool_directory is longer than 200 chars: aborting");
3212
3213 /* Length check on the process name given to syslog for its TAG field,
3214 which is only permitted to be 32 characters or less. See RFC 3164. */
3215
3216 if (Ustrlen(syslog_processname) > 32)
3217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3218 "syslog_processname is longer than 32 chars: aborting");
3219
3220 /* In some operating systems, the environment variable TMPDIR controls where
3221 temporary files are created; Exim doesn't use these (apart from when delivering
3222 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3223 If TMPDIR is found in the environment, reset it to the value defined in the
3224 TMPDIR macro, if this macro is defined. */
3225
3226 #ifdef TMPDIR
3227 {
3228 uschar **p;
3229 for (p = USS environ; *p != NULL; p++)
3230 {
3231 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3232 Ustrcmp(*p+7, TMPDIR) != 0)
3233 {
3234 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3235 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3236 *p = newp;
3237 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3238 }
3239 }
3240 }
3241 #endif
3242
3243 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3244 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3245 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3246 called by a user who has set the TZ variable. This then affects the timestamps
3247 in log files and in Received: headers, and any created Date: header lines. The
3248 required timezone is settable in the configuration file, so nothing can be done
3249 about this earlier - but hopefully nothing will normally be logged earlier than
3250 this. We have to make a new environment if TZ is wrong, but don't bother if
3251 timestamps_utc is set, because then all times are in UTC anyway. */
3252
3253 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3254 {
3255 timestamps_utc = TRUE;
3256 }
3257 else
3258 {
3259 uschar *envtz = US getenv("TZ");
3260 if ((envtz == NULL && timezone_string != NULL) ||
3261 (envtz != NULL &&
3262 (timezone_string == NULL ||
3263 Ustrcmp(timezone_string, envtz) != 0)))
3264 {
3265 uschar **p = USS environ;
3266 uschar **new;
3267 uschar **newp;
3268 int count = 0;
3269 while (*p++ != NULL) count++;
3270 if (envtz == NULL) count++;
3271 newp = new = malloc(sizeof(uschar *) * (count + 1));
3272 for (p = USS environ; *p != NULL; p++)
3273 {
3274 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3275 *newp++ = *p;
3276 }
3277 if (timezone_string != NULL)
3278 {
3279 *newp = malloc(Ustrlen(timezone_string) + 4);
3280 sprintf(CS *newp++, "TZ=%s", timezone_string);
3281 }
3282 *newp = NULL;
3283 environ = CSS new;
3284 tzset();
3285 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3286 tod_stamp(tod_log));
3287 }
3288 }
3289
3290 /* Handle the case when we have removed the setuid privilege because of -C or
3291 -D. This means that the caller of Exim was not root, and, provided that
3292 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3293 the binary.
3294
3295 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3296 were running as the exim user defined in the configuration file (different to
3297 the one in the binary). The sysadmin may expect this case to retain privilege
3298 because "the binary was called by the Exim user", but it hasn't, because of the
3299 order in which it handles this stuff. There are two possibilities:
3300
3301 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3302 to do message deliveries. Thus, the fact that it is running as a
3303 non-privileged user is plausible, and might be wanted in some special
3304 configurations. However, really_exim will have been set false when
3305 privilege was dropped, to stop Exim trying to write to its normal log
3306 files. Therefore, re-enable normal log processing, assuming the sysadmin
3307 has set up the log directory correctly.
3308
3309 (2) If deliver_drop_privilege is not set, the configuration won't work as
3310 apparently intended, and so we log a panic message. In order to retain
3311 root for -C or -D, the caller must either be root or the Exim user
3312 defined in the binary (when deliver_drop_ privilege is false).
3313
3314 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3315 built-in exim user or one defined in the configuration. In either event,
3316 re-enable log processing, assuming the sysadmin knows what they are doing. */
3317
3318 if (removed_privilege && (config_changed || macros != NULL) &&
3319 real_uid == exim_uid)
3320 {
3321 #ifdef ALT_CONFIG_ROOT_ONLY
3322 really_exim = TRUE; /* let logging work normally */
3323 #else
3324
3325 if (deliver_drop_privilege)
3326 really_exim = TRUE; /* let logging work normally */
3327 else
3328 log_write(0, LOG_MAIN|LOG_PANIC,
3329 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3330 (int)exim_uid, config_changed? "-C" : "-D");
3331 #endif
3332 }
3333
3334 /* Start up Perl interpreter if Perl support is configured and there is a
3335 perl_startup option, and the configuration or the command line specifies
3336 initializing starting. Note that the global variables are actually called
3337 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3338
3339 #ifdef EXIM_PERL
3340 if (perl_start_option != 0)
3341 opt_perl_at_start = (perl_start_option > 0);
3342 if (opt_perl_at_start && opt_perl_startup != NULL)
3343 {
3344 uschar *errstr;
3345 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3346 errstr = init_perl(opt_perl_startup);
3347 if (errstr != NULL)
3348 {
3349 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3350 return EXIT_FAILURE;
3351 }
3352 opt_perl_started = TRUE;
3353 }
3354 #endif /* EXIM_PERL */
3355
3356 /* Log the arguments of the call if the configuration file said so. This is
3357 a debugging feature for finding out what arguments certain MUAs actually use.
3358 Don't attempt it if logging is disabled, or if listing variables or if
3359 verifying/testing addresses or expansions. */
3360
3361 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3362 && really_exim && !list_options && !checking)
3363 {
3364 int i;
3365 uschar *p = big_buffer;
3366 Ustrcpy(p, "cwd=");
3367 (void)getcwd(CS p+4, big_buffer_size - 4);
3368 while (*p) p++;
3369 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3370 while (*p) p++;
3371 for (i = 0; i < argc; i++)
3372 {
3373 int len = Ustrlen(argv[i]);
3374 uschar *printing;
3375 uschar *quote;
3376 if (p + len + 8 >= big_buffer + big_buffer_size)
3377 {
3378 Ustrcpy(p, " ...");
3379 log_write(0, LOG_MAIN, "%s", big_buffer);
3380 Ustrcpy(big_buffer, "...");
3381 p = big_buffer + 3;
3382 }
3383 printing = string_printing(argv[i]);
3384 if (printing[0] == 0) quote = US"\""; else
3385 {
3386 uschar *pp = printing;
3387 quote = US"";
3388 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3389 }
3390 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3391 (p - big_buffer) - 4), printing, quote);
3392 while (*p) p++;
3393 }
3394
3395 if ((log_extra_selector & LX_arguments) != 0)
3396 log_write(0, LOG_MAIN, "%s", big_buffer);
3397 else
3398 debug_printf("%s\n", big_buffer);
3399 }
3400
3401 /* Set the working directory to be the top-level spool directory. We don't rely
3402 on this in the code, which always uses fully qualified names, but it's useful
3403 for core dumps etc. Don't complain if it fails - the spool directory might not
3404 be generally accessible and calls with the -C option (and others) have lost
3405 privilege by now. Before the chdir, we try to ensure that the directory exists.
3406 */
3407
3408 if (Uchdir(spool_directory) != 0)
3409 {
3410 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3411 (void)Uchdir(spool_directory);
3412 }
3413
3414 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3415 alias file. Exim doesn't have such a concept, but this call is screwed into
3416 Sun's YP makefiles. Handle this by calling a configured script, as the real
3417 user who called Exim. The -oA option can be used to pass an argument to the
3418 script. */
3419
3420 if (bi_option)
3421 {
3422 (void)fclose(config_file);
3423 if (bi_command != NULL)
3424 {
3425 int i = 0;
3426 uschar *argv[3];
3427 argv[i++] = bi_command;
3428 if (alias_arg != NULL) argv[i++] = alias_arg;
3429 argv[i++] = NULL;
3430
3431 setgroups(group_count, group_list);
3432 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3433
3434 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3435 (argv[1] == NULL)? US"" : argv[1]);
3436
3437 execv(CS argv[0], (char *const *)argv);
3438 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3439 exit(EXIT_FAILURE);
3440 }
3441 else
3442 {
3443 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3444 exit(EXIT_SUCCESS);
3445 }
3446 }
3447
3448 /* If an action on specific messages is requested, or if a daemon or queue
3449 runner is being started, we need to know if Exim was called by an admin user.
3450 This is the case if the real user is root or exim, or if the real group is
3451 exim, or if one of the supplementary groups is exim or a group listed in
3452 admin_groups. We don't fail all message actions immediately if not admin_user,
3453 since some actions can be performed by non-admin users. Instead, set admin_user
3454 for later interrogation. */
3455
3456 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3457 admin_user = TRUE;
3458 else
3459 {
3460 int i, j;
3461
3462 for (i = 0; i < group_count; i++)
3463 {
3464 if (group_list[i] == exim_gid) admin_user = TRUE;
3465 else if (admin_groups != NULL)
3466 {
3467 for (j = 1; j <= (int)(admin_groups[0]); j++)
3468 if (admin_groups[j] == group_list[i])
3469 { admin_user = TRUE; break; }
3470 }
3471 if (admin_user) break;
3472 }
3473 }
3474
3475 /* Another group of privileged users are the trusted users. These are root,
3476 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3477 are permitted to specify sender_addresses with -f on the command line, and
3478 other message parameters as well. */
3479
3480 if (real_uid == root_uid || real_uid == exim_uid)
3481 trusted_caller = TRUE;
3482 else
3483 {
3484 int i, j;
3485
3486 if (trusted_users != NULL)
3487 {
3488 for (i = 1; i <= (int)(trusted_users[0]); i++)
3489 if (trusted_users[i] == real_uid)
3490 { trusted_caller = TRUE; break; }
3491 }
3492
3493 if (!trusted_caller && trusted_groups != NULL)
3494 {
3495 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3496 {
3497 if (trusted_groups[i] == real_gid)
3498 trusted_caller = TRUE;
3499 else for (j = 0; j < group_count; j++)
3500 {
3501 if (trusted_groups[i] == group_list[j])
3502 { trusted_caller = TRUE; break; }
3503 }
3504 if (trusted_caller) break;
3505 }
3506 }
3507 }
3508
3509 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3510 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3511
3512 /* Only an admin user may start the daemon or force a queue run in the default
3513 configuration, but the queue run restriction can be relaxed. Only an admin
3514 user may request that a message be returned to its sender forthwith. Only an
3515 admin user may specify a debug level greater than D_v (because it might show
3516 passwords, etc. in lookup queries). Only an admin user may request a queue