92f5623d23af304dbd3ee9c4de7c59fc7f7a1c70
[exim.git] / src / src / exim.c
1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
4
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
7
8
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
11
12
13 #include "exim.h"
14
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
17 #endif
18
19 #ifdef USE_GNUTLS
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22 # define DISABLE_OCSP
23 # endif
24 #endif
25
26 #ifndef _TIME_H
27 # include <time.h>
28 #endif
29
30 extern void init_lookup_list(void);
31
32
33
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
37
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
45
46 static void *
47 function_store_get(size_t size)
48 {
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
52 }
53
54 static void
55 function_dummy_free(void *block) { block = block; }
56
57 static void *
58 function_store_malloc(size_t size)
59 {
60 return store_malloc((int)size);
61 }
62
63 static void
64 function_store_free(void *block)
65 {
66 store_free(block);
67 }
68
69
70
71
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
75
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
78
79
80
81
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
85
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
91
92 Argument:
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
96
97 Returns: pointer to the compiled pattern
98 */
99
100 const pcre *
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
102 {
103 int offset;
104 int options = PCRE_COPT;
105 const pcre *yield;
106 const uschar *error;
107 if (use_malloc)
108 {
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
111 }
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
116 if (yield == NULL)
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
119 return yield;
120 }
121
122
123
124
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
128
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
131
132 Arguments:
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
139
140 Returns: TRUE or FALSE
141 */
142
143 BOOL
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
145 {
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
150 BOOL yield = n >= 0;
151 if (n == 0) n = EXPAND_MAXN + 1;
152 if (yield)
153 {
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
156 {
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
159 }
160 expand_nmax--;
161 }
162 return yield;
163 }
164
165
166
167
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
171
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
174
175 Arguments: format and arguments, as for printf()
176 Returns: nothing
177 */
178
179 void
180 set_process_info(const char *format, ...)
181 {
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
183 gstring * g;
184 int len;
185 va_list ap;
186
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
188 len = g->ptr;
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
191 {
192 gs.ptr = len;
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
194 }
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
199 va_end(ap);
200 }
201
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
205
206 static void
207 term_handler(int sig)
208 {
209 exit(1);
210 }
211
212
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
216
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
221
222 This function takes care to be signal-safe.
223
224 Argument: the signal number (SIGUSR1)
225 Returns: nothing
226 */
227
228 static void
229 usr1_handler(int sig)
230 {
231 int fd;
232
233 os_restarting_signal(sig, usr1_handler);
234
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
236 {
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
240
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
246 }
247
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
251
252 if (fd < 0) return;
253
254 (void)write(fd, process_info, process_info_len);
255 (void)close(fd);
256 }
257
258
259
260 /*************************************************
261 * Timeout handler *
262 *************************************************/
263
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
267 re-enables itself.
268
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
273
274 Argument: the signal value (SIGALRM)
275 Returns: nothing
276 */
277
278 void
279 sigalrm_handler(int sig)
280 {
281 sig = sig; /* Keep picky compilers happy */
282 sigalrm_seen = TRUE;
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
284 }
285
286
287
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
291
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
298
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
302
303 Argument: an itimerval structure containing the interval
304 Returns: nothing
305 */
306
307 static void
308 milliwait(struct itimerval *itval)
309 {
310 sigset_t sigmask;
311 sigset_t old_sigmask;
312
313 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
314 return;
315 (void)sigemptyset(&sigmask); /* Empty mask */
316 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
318 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
321 (void)sigfillset(&sigmask); /* All signals */
322 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
323 (void)sigsuspend(&sigmask); /* Until SIGALRM */
324 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
325 }
326
327
328
329
330 /*************************************************
331 * Millisecond sleep function *
332 *************************************************/
333
334 /* The basic sleep() function has a granularity of 1 second, which is too rough
335 in some cases - for example, when using an increasing delay to slow down
336 spammers.
337
338 Argument: number of millseconds
339 Returns: nothing
340 */
341
342 void
343 millisleep(int msec)
344 {
345 struct itimerval itval;
346 itval.it_interval.tv_sec = 0;
347 itval.it_interval.tv_usec = 0;
348 itval.it_value.tv_sec = msec/1000;
349 itval.it_value.tv_usec = (msec % 1000) * 1000;
350 milliwait(&itval);
351 }
352
353
354
355 /*************************************************
356 * Compare microsecond times *
357 *************************************************/
358
359 /*
360 Arguments:
361 tv1 the first time
362 tv2 the second time
363
364 Returns: -1, 0, or +1
365 */
366
367 static int
368 exim_tvcmp(struct timeval *t1, struct timeval *t2)
369 {
370 if (t1->tv_sec > t2->tv_sec) return +1;
371 if (t1->tv_sec < t2->tv_sec) return -1;
372 if (t1->tv_usec > t2->tv_usec) return +1;
373 if (t1->tv_usec < t2->tv_usec) return -1;
374 return 0;
375 }
376
377
378
379
380 /*************************************************
381 * Clock tick wait function *
382 *************************************************/
383
384 #ifdef _POSIX_MONOTONIC_CLOCK
385 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
386 static struct timespec offset_ts;
387
388 static void
389 exim_clock_init(void)
390 {
391 struct timeval tv;
392 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
393 (void)gettimeofday(&tv, NULL);
394 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
395 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
396 if (offset_ts.tv_nsec >= 0) return;
397 offset_ts.tv_sec--;
398 offset_ts.tv_nsec += 1000*1000*1000;
399 }
400 #endif
401
402
403 /* Exim uses a time + a pid to generate a unique identifier in two places: its
404 message IDs, and in file names for maildir deliveries. Because some OS now
405 re-use pids within the same second, sub-second times are now being used.
406 However, for absolute certainty, we must ensure the clock has ticked before
407 allowing the relevant process to complete. At the time of implementation of
408 this code (February 2003), the speed of processors is such that the clock will
409 invariably have ticked already by the time a process has done its job. This
410 function prepares for the time when things are faster - and it also copes with
411 clocks that go backwards.
412
413 Arguments:
414 tgt_tv A timeval which was used to create uniqueness; its usec field
415 has been rounded down to the value of the resolution.
416 We want to be sure the current time is greater than this.
417 resolution The resolution that was used to divide the microseconds
418 (1 for maildir, larger for message ids)
419
420 Returns: nothing
421 */
422
423 void
424 exim_wait_tick(struct timeval * tgt_tv, int resolution)
425 {
426 struct timeval now_tv;
427 long int now_true_usec;
428
429 #ifdef _POSIX_MONOTONIC_CLOCK
430 struct timespec now_ts;
431
432 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
433 {
434 now_ts.tv_sec += offset_ts.tv_sec;
435 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
436 {
437 now_ts.tv_sec++;
438 now_ts.tv_nsec -= 1000*1000*1000;
439 }
440 now_tv.tv_sec = now_ts.tv_sec;
441 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
442 now_tv.tv_usec = now_true_usec;
443 }
444 else
445 #endif
446 {
447 (void)gettimeofday(&now_tv, NULL);
448 now_true_usec = now_tv.tv_usec;
449 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
450 }
451
452 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
453 {
454 struct itimerval itval;
455 itval.it_interval.tv_sec = 0;
456 itval.it_interval.tv_usec = 0;
457 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
458 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
459
460 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
461 negative value for the microseconds is possible only in the case when "now"
462 is more than a second less than "tgt". That means that itval.it_value.tv_sec
463 is greater than zero. The following correction is therefore safe. */
464
465 if (itval.it_value.tv_usec < 0)
466 {
467 itval.it_value.tv_usec += 1000000;
468 itval.it_value.tv_sec -= 1;
469 }
470
471 DEBUG(D_transport|D_receive)
472 {
473 if (!f.running_in_test_harness)
474 {
475 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
476 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
477 now_tv.tv_sec, (long) now_tv.tv_usec);
478 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
479 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
480 }
481 }
482
483 milliwait(&itval);
484
485 /* Be prapared to go around if the kernel does not implement subtick
486 granularity (GNU Hurd) */
487
488 (void)gettimeofday(&now_tv, NULL);
489 now_true_usec = now_tv.tv_usec;
490 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
491 }
492 }
493
494
495
496
497 /*************************************************
498 * Call fopen() with umask 777 and adjust mode *
499 *************************************************/
500
501 /* Exim runs with umask(0) so that files created with open() have the mode that
502 is specified in the open() call. However, there are some files, typically in
503 the spool directory, that are created with fopen(). They end up world-writeable
504 if no precautions are taken. Although the spool directory is not accessible to
505 the world, this is an untidiness. So this is a wrapper function for fopen()
506 that sorts out the mode of the created file.
507
508 Arguments:
509 filename the file name
510 options the fopen() options
511 mode the required mode
512
513 Returns: the fopened FILE or NULL
514 */
515
516 FILE *
517 modefopen(const uschar *filename, const char *options, mode_t mode)
518 {
519 mode_t saved_umask = umask(0777);
520 FILE *f = Ufopen(filename, options);
521 (void)umask(saved_umask);
522 if (f != NULL) (void)fchmod(fileno(f), mode);
523 return f;
524 }
525
526
527 /*************************************************
528 * Ensure stdin, stdout, and stderr exist *
529 *************************************************/
530
531 /* Some operating systems grumble if an exec() happens without a standard
532 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
533 file will be opened and will use these fd values, and then some other bit of
534 code will assume, for example, that it can write error messages to stderr.
535 This function ensures that fds 0, 1, and 2 are open if they do not already
536 exist, by connecting them to /dev/null.
537
538 This function is also used to ensure that std{in,out,err} exist at all times,
539 so that if any library that Exim calls tries to use them, it doesn't crash.
540
541 Arguments: None
542 Returns: Nothing
543 */
544
545 void
546 exim_nullstd(void)
547 {
548 int devnull = -1;
549 struct stat statbuf;
550 for (int i = 0; i <= 2; i++)
551 {
552 if (fstat(i, &statbuf) < 0 && errno == EBADF)
553 {
554 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
555 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
556 string_open_failed(errno, "/dev/null", NULL));
557 if (devnull != i) (void)dup2(devnull, i);
558 }
559 }
560 if (devnull > 2) (void)close(devnull);
561 }
562
563
564
565
566 /*************************************************
567 * Close unwanted file descriptors for delivery *
568 *************************************************/
569
570 /* This function is called from a new process that has been forked to deliver
571 an incoming message, either directly, or using exec.
572
573 We want any smtp input streams to be closed in this new process. However, it
574 has been observed that using fclose() here causes trouble. When reading in -bS
575 input, duplicate copies of messages have been seen. The files will be sharing a
576 file pointer with the parent process, and it seems that fclose() (at least on
577 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
578 least sometimes. Hence we go for closing the underlying file descriptors.
579
580 If TLS is active, we want to shut down the TLS library, but without molesting
581 the parent's SSL connection.
582
583 For delivery of a non-SMTP message, we want to close stdin and stdout (and
584 stderr unless debugging) because the calling process might have set them up as
585 pipes and be waiting for them to close before it waits for the submission
586 process to terminate. If they aren't closed, they hold up the calling process
587 until the initial delivery process finishes, which is not what we want.
588
589 Exception: We do want it for synchronous delivery!
590
591 And notwithstanding all the above, if D_resolver is set, implying resolver
592 debugging, leave stdout open, because that's where the resolver writes its
593 debugging output.
594
595 When we close stderr (which implies we've also closed stdout), we also get rid
596 of any controlling terminal.
597
598 Arguments: None
599 Returns: Nothing
600 */
601
602 static void
603 close_unwanted(void)
604 {
605 if (smtp_input)
606 {
607 #ifndef DISABLE_TLS
608 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
609 #endif
610 (void)close(fileno(smtp_in));
611 (void)close(fileno(smtp_out));
612 smtp_in = NULL;
613 }
614 else
615 {
616 (void)close(0); /* stdin */
617 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
618 if (debug_selector == 0) /* stderr */
619 {
620 if (!f.synchronous_delivery)
621 {
622 (void)close(2);
623 log_stderr = NULL;
624 }
625 (void)setsid();
626 }
627 }
628 }
629
630
631
632
633 /*************************************************
634 * Set uid and gid *
635 *************************************************/
636
637 /* This function sets a new uid and gid permanently, optionally calling
638 initgroups() to set auxiliary groups. There are some special cases when running
639 Exim in unprivileged modes. In these situations the effective uid will not be
640 root; if we already have the right effective uid/gid, and don't need to
641 initialize any groups, leave things as they are.
642
643 Arguments:
644 uid the uid
645 gid the gid
646 igflag TRUE if initgroups() wanted
647 msg text to use in debugging output and failure log
648
649 Returns: nothing; bombs out on failure
650 */
651
652 void
653 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
654 {
655 uid_t euid = geteuid();
656 gid_t egid = getegid();
657
658 if (euid == root_uid || euid != uid || egid != gid || igflag)
659 {
660 /* At least one OS returns +1 for initgroups failure, so just check for
661 non-zero. */
662
663 if (igflag)
664 {
665 struct passwd *pw = getpwuid(uid);
666 if (!pw)
667 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
668 "no passwd entry for uid=%ld", (long int)uid);
669
670 if (initgroups(pw->pw_name, gid) != 0)
671 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
672 (long int)uid, strerror(errno));
673 }
674
675 if (setgid(gid) < 0 || setuid(uid) < 0)
676 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
677 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
678 }
679
680 /* Debugging output included uid/gid and all groups */
681
682 DEBUG(D_uid)
683 {
684 int group_count, save_errno;
685 gid_t group_list[EXIM_GROUPLIST_SIZE];
686 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
687 (long int)geteuid(), (long int)getegid(), (long int)getpid());
688 group_count = getgroups(nelem(group_list), group_list);
689 save_errno = errno;
690 debug_printf(" auxiliary group list:");
691 if (group_count > 0)
692 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
693 else if (group_count < 0)
694 debug_printf(" <error: %s>", strerror(save_errno));
695 else debug_printf(" <none>");
696 debug_printf("\n");
697 }
698 }
699
700
701
702
703 /*************************************************
704 * Exit point *
705 *************************************************/
706
707 /* Exim exits via this function so that it always clears up any open
708 databases.
709
710 Arguments:
711 rc return code
712
713 Returns: does not return
714 */
715
716 void
717 exim_exit(int rc, const uschar * process)
718 {
719 search_tidyup();
720 store_exit();
721 DEBUG(D_any)
722 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
723 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
724 process ? "(" : "", process, process ? ") " : "", rc);
725 exit(rc);
726 }
727
728
729 void
730 exim_underbar_exit(int rc)
731 {
732 store_exit();
733 _exit(rc);
734 }
735
736
737
738 /* Print error string, then die */
739 static void
740 exim_fail(const char * fmt, ...)
741 {
742 va_list ap;
743 va_start(ap, fmt);
744 vfprintf(stderr, fmt, ap);
745 exit(EXIT_FAILURE);
746 }
747
748 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
749 of chown()/fchown(). See src/functions.h for more explanation */
750 int
751 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
752 {
753 int saved_errno = errno; /* from the preceeding chown call */
754 #if 1
755 log_write(0, LOG_MAIN|LOG_PANIC,
756 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
757 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
758 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
759 #else
760 /* I leave this here, commented, in case the "bug"(?) comes up again.
761 It is not an Exim bug, but we can provide a workaround.
762 See Bug 2391
763 HS 2019-04-18 */
764
765 struct stat buf;
766
767 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
768 {
769 if (buf.st_uid == owner && buf.st_gid == group) return 0;
770 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
771 }
772 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
773
774 #endif
775 errno = saved_errno;
776 return -1;
777 }
778
779
780 /*************************************************
781 * Extract port from host address *
782 *************************************************/
783
784 /* Called to extract the port from the values given to -oMa and -oMi.
785 It also checks the syntax of the address, and terminates it before the
786 port data when a port is extracted.
787
788 Argument:
789 address the address, with possible port on the end
790
791 Returns: the port, or zero if there isn't one
792 bombs out on a syntax error
793 */
794
795 static int
796 check_port(uschar *address)
797 {
798 int port = host_address_extract_port(address);
799 if (string_is_ip_address(address, NULL) == 0)
800 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
801 return port;
802 }
803
804
805
806 /*************************************************
807 * Test/verify an address *
808 *************************************************/
809
810 /* This function is called by the -bv and -bt code. It extracts a working
811 address from a full RFC 822 address. This isn't really necessary per se, but it
812 has the effect of collapsing source routes.
813
814 Arguments:
815 s the address string
816 flags flag bits for verify_address()
817 exit_value to be set for failures
818
819 Returns: nothing
820 */
821
822 static void
823 test_address(uschar *s, int flags, int *exit_value)
824 {
825 int start, end, domain;
826 uschar *parse_error = NULL;
827 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
828 FALSE);
829 if (address == NULL)
830 {
831 fprintf(stdout, "syntax error: %s\n", parse_error);
832 *exit_value = 2;
833 }
834 else
835 {
836 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
837 -1, -1, NULL, NULL, NULL);
838 if (rc == FAIL) *exit_value = 2;
839 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
840 }
841 }
842
843
844
845 /*************************************************
846 * Show supported features *
847 *************************************************/
848
849 static void
850 show_db_version(FILE * f)
851 {
852 #ifdef DB_VERSION_STRING
853 DEBUG(D_any)
854 {
855 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
856 fprintf(f, " Runtime: %s\n",
857 db_version(NULL, NULL, NULL));
858 }
859 else
860 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
861
862 #elif defined(BTREEVERSION) && defined(HASHVERSION)
863 #ifdef USE_DB
864 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
865 #else
866 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
867 #endif
868
869 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
870 fprintf(f, "Probably ndbm\n");
871 #elif defined(USE_TDB)
872 fprintf(f, "Using tdb\n");
873 #else
874 #ifdef USE_GDBM
875 fprintf(f, "Probably GDBM (native mode)\n");
876 #else
877 fprintf(f, "Probably GDBM (compatibility mode)\n");
878 #endif
879 #endif
880 }
881
882
883 /* This function is called for -bV/--version and for -d to output the optional
884 features of the current Exim binary.
885
886 Arguments: a FILE for printing
887 Returns: nothing
888 */
889
890 static void
891 show_whats_supported(FILE * fp)
892 {
893 DEBUG(D_any) {} else show_db_version(fp);
894
895 fprintf(fp, "Support for:");
896 #ifdef SUPPORT_CRYPTEQ
897 fprintf(fp, " crypteq");
898 #endif
899 #if HAVE_ICONV
900 fprintf(fp, " iconv()");
901 #endif
902 #if HAVE_IPV6
903 fprintf(fp, " IPv6");
904 #endif
905 #ifdef HAVE_SETCLASSRESOURCES
906 fprintf(fp, " use_setclassresources");
907 #endif
908 #ifdef SUPPORT_PAM
909 fprintf(fp, " PAM");
910 #endif
911 #ifdef EXIM_PERL
912 fprintf(fp, " Perl");
913 #endif
914 #ifdef EXPAND_DLFUNC
915 fprintf(fp, " Expand_dlfunc");
916 #endif
917 #ifdef USE_TCP_WRAPPERS
918 fprintf(fp, " TCPwrappers");
919 #endif
920 #ifdef USE_GNUTLS
921 fprintf(fp, " GnuTLS");
922 #endif
923 #ifdef USE_OPENSSL
924 fprintf(fp, " OpenSSL");
925 #endif
926 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
927 fprintf(fp, " translate_ip_address");
928 #endif
929 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
930 fprintf(fp, " move_frozen_messages");
931 #endif
932 #ifdef WITH_CONTENT_SCAN
933 fprintf(fp, " Content_Scanning");
934 #endif
935 #ifdef SUPPORT_DANE
936 fprintf(fp, " DANE");
937 #endif
938 #ifndef DISABLE_DKIM
939 fprintf(fp, " DKIM");
940 #endif
941 #ifndef DISABLE_DNSSEC
942 fprintf(fp, " DNSSEC");
943 #endif
944 #ifndef DISABLE_EVENT
945 fprintf(fp, " Event");
946 #endif
947 #ifdef SUPPORT_I18N
948 fprintf(fp, " I18N");
949 #endif
950 #ifndef DISABLE_OCSP
951 fprintf(fp, " OCSP");
952 #endif
953 #ifndef DISABLE_PIPE_CONNECT
954 fprintf(fp, " PIPE_CONNECT");
955 #endif
956 #ifndef DISABLE_PRDR
957 fprintf(fp, " PRDR");
958 #endif
959 #ifdef SUPPORT_PROXY
960 fprintf(fp, " PROXY");
961 #endif
962 #ifdef SUPPORT_SOCKS
963 fprintf(fp, " SOCKS");
964 #endif
965 #ifdef SUPPORT_SPF
966 fprintf(fp, " SPF");
967 #endif
968 #ifdef SUPPORT_DMARC
969 fprintf(fp, " DMARC");
970 #endif
971 #ifdef TCP_FASTOPEN
972 tcp_init();
973 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
974 #endif
975 #ifdef EXPERIMENTAL_LMDB
976 fprintf(fp, " Experimental_LMDB");
977 #endif
978 #ifdef EXPERIMENTAL_QUEUEFILE
979 fprintf(fp, " Experimental_QUEUEFILE");
980 #endif
981 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
982 fprintf(fp, " Experimental_SRS");
983 #endif
984 #ifdef EXPERIMENTAL_ARC
985 fprintf(fp, " Experimental_ARC");
986 #endif
987 #ifdef EXPERIMENTAL_BRIGHTMAIL
988 fprintf(fp, " Experimental_Brightmail");
989 #endif
990 #ifdef EXPERIMENTAL_DCC
991 fprintf(fp, " Experimental_DCC");
992 #endif
993 #ifdef EXPERIMENTAL_DSN_INFO
994 fprintf(fp, " Experimental_DSN_info");
995 #endif
996 #ifdef EXPERIMENTAL_TLS_RESUME
997 fprintf(fp, " Experimental_TLS_resume");
998 #endif
999 fprintf(fp, "\n");
1000
1001 fprintf(fp, "Lookups (built-in):");
1002 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1003 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1004 #endif
1005 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1006 fprintf(fp, " cdb");
1007 #endif
1008 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1009 fprintf(fp, " dbm dbmjz dbmnz");
1010 #endif
1011 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1012 fprintf(fp, " dnsdb");
1013 #endif
1014 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1015 fprintf(fp, " dsearch");
1016 #endif
1017 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1018 fprintf(fp, " ibase");
1019 #endif
1020 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1021 fprintf(fp, " json");
1022 #endif
1023 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1024 fprintf(fp, " ldap ldapdn ldapm");
1025 #endif
1026 #ifdef EXPERIMENTAL_LMDB
1027 fprintf(fp, " lmdb");
1028 #endif
1029 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1030 fprintf(fp, " mysql");
1031 #endif
1032 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1033 fprintf(fp, " nis nis0");
1034 #endif
1035 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1036 fprintf(fp, " nisplus");
1037 #endif
1038 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1039 fprintf(fp, " oracle");
1040 #endif
1041 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1042 fprintf(fp, " passwd");
1043 #endif
1044 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1045 fprintf(fp, " pgsql");
1046 #endif
1047 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1048 fprintf(fp, " redis");
1049 #endif
1050 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1051 fprintf(fp, " sqlite");
1052 #endif
1053 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1054 fprintf(fp, " testdb");
1055 #endif
1056 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1057 fprintf(fp, " whoson");
1058 #endif
1059 fprintf(fp, "\n");
1060
1061 auth_show_supported(fp);
1062 route_show_supported(fp);
1063 transport_show_supported(fp);
1064
1065 #ifdef WITH_CONTENT_SCAN
1066 malware_show_supported(fp);
1067 #endif
1068
1069 if (fixed_never_users[0] > 0)
1070 {
1071 int i;
1072 fprintf(fp, "Fixed never_users: ");
1073 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1074 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1075 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1076 }
1077
1078 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1079
1080 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1081
1082 /* Everything else is details which are only worth reporting when debugging.
1083 Perhaps the tls_version_report should move into this too. */
1084 DEBUG(D_any) do {
1085
1086 /* clang defines __GNUC__ (at least, for me) so test for it first */
1087 #if defined(__clang__)
1088 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1089 #elif defined(__GNUC__)
1090 fprintf(fp, "Compiler: GCC [%s]\n",
1091 # ifdef __VERSION__
1092 __VERSION__
1093 # else
1094 "? unknown version ?"
1095 # endif
1096 );
1097 #else
1098 fprintf(fp, "Compiler: <unknown>\n");
1099 #endif
1100
1101 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1102 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1103 __GLIBC__, __GLIBC_MINOR__);
1104 if (__GLIBC_PREREQ(2, 1))
1105 fprintf(fp, " Runtime: %s\n",
1106 gnu_get_libc_version());
1107 #endif
1108
1109 show_db_version(fp);
1110
1111 #ifndef DISABLE_TLS
1112 tls_version_report(fp);
1113 #endif
1114 #ifdef SUPPORT_I18N
1115 utf8_version_report(fp);
1116 #endif
1117 #ifdef SUPPORT_SPF
1118 spf_lib_version_report(fp);
1119 #endif
1120
1121 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1122 if (authi->version_report)
1123 (*authi->version_report)(fp);
1124
1125 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1126 characters; unless it's an ancient version of PCRE in which case it
1127 is not defined. */
1128 #ifndef PCRE_PRERELEASE
1129 # define PCRE_PRERELEASE
1130 #endif
1131 #define QUOTE(X) #X
1132 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1133 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1134 " Runtime: %s\n",
1135 PCRE_MAJOR, PCRE_MINOR,
1136 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1137 pcre_version());
1138 #undef QUOTE
1139 #undef EXPAND_AND_QUOTE
1140
1141 init_lookup_list();
1142 for (int i = 0; i < lookup_list_count; i++)
1143 if (lookup_list[i]->version_report)
1144 lookup_list[i]->version_report(fp);
1145
1146 #ifdef WHITELIST_D_MACROS
1147 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1148 #else
1149 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1150 #endif
1151 #ifdef TRUSTED_CONFIG_LIST
1152 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1153 #else
1154 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1155 #endif
1156
1157 } while (0);
1158 }
1159
1160
1161 /*************************************************
1162 * Show auxiliary information about Exim *
1163 *************************************************/
1164
1165 static void
1166 show_exim_information(enum commandline_info request, FILE *stream)
1167 {
1168 switch(request)
1169 {
1170 case CMDINFO_NONE:
1171 fprintf(stream, "Oops, something went wrong.\n");
1172 return;
1173 case CMDINFO_HELP:
1174 fprintf(stream,
1175 "The -bI: flag takes a string indicating which information to provide.\n"
1176 "If the string is not recognised, you'll get this help (on stderr).\n"
1177 "\n"
1178 " exim -bI:help this information\n"
1179 " exim -bI:dscp list of known dscp value keywords\n"
1180 " exim -bI:sieve list of supported sieve extensions\n"
1181 );
1182 return;
1183 case CMDINFO_SIEVE:
1184 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1185 fprintf(stream, "%s\n", *pp);
1186 return;
1187 case CMDINFO_DSCP:
1188 dscp_list_to_stream(stream);
1189 return;
1190 }
1191 }
1192
1193
1194 /*************************************************
1195 * Quote a local part *
1196 *************************************************/
1197
1198 /* This function is used when a sender address or a From: or Sender: header
1199 line is being created from the caller's login, or from an authenticated_id. It
1200 applies appropriate quoting rules for a local part.
1201
1202 Argument: the local part
1203 Returns: the local part, quoted if necessary
1204 */
1205
1206 uschar *
1207 local_part_quote(uschar *lpart)
1208 {
1209 BOOL needs_quote = FALSE;
1210 gstring * g;
1211
1212 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1213 {
1214 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1215 (*t != '.' || t == lpart || t[1] == 0);
1216 }
1217
1218 if (!needs_quote) return lpart;
1219
1220 g = string_catn(NULL, US"\"", 1);
1221
1222 for (;;)
1223 {
1224 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1225 if (nq == NULL)
1226 {
1227 g = string_cat(g, lpart);
1228 break;
1229 }
1230 g = string_catn(g, lpart, nq - lpart);
1231 g = string_catn(g, US"\\", 1);
1232 g = string_catn(g, nq, 1);
1233 lpart = nq + 1;
1234 }
1235
1236 g = string_catn(g, US"\"", 1);
1237 return string_from_gstring(g);
1238 }
1239
1240
1241
1242 #ifdef USE_READLINE
1243 /*************************************************
1244 * Load readline() functions *
1245 *************************************************/
1246
1247 /* This function is called from testing executions that read data from stdin,
1248 but only when running as the calling user. Currently, only -be does this. The
1249 function loads the readline() function library and passes back the functions.
1250 On some systems, it needs the curses library, so load that too, but try without
1251 it if loading fails. All this functionality has to be requested at build time.
1252
1253 Arguments:
1254 fn_readline_ptr pointer to where to put the readline pointer
1255 fn_addhist_ptr pointer to where to put the addhistory function
1256
1257 Returns: the dlopen handle or NULL on failure
1258 */
1259
1260 static void *
1261 set_readline(char * (**fn_readline_ptr)(const char *),
1262 void (**fn_addhist_ptr)(const char *))
1263 {
1264 void *dlhandle;
1265 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1266
1267 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1268 if (dlhandle_curses) dlclose(dlhandle_curses);
1269
1270 if (dlhandle)
1271 {
1272 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1273 * char * readline (const char *prompt);
1274 * void add_history (const char *string);
1275 */
1276 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1277 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1278 }
1279 else
1280 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1281
1282 return dlhandle;
1283 }
1284 #endif
1285
1286
1287
1288 /*************************************************
1289 * Get a line from stdin for testing things *
1290 *************************************************/
1291
1292 /* This function is called when running tests that can take a number of lines
1293 of input (for example, -be and -bt). It handles continuations and trailing
1294 spaces. And prompting and a blank line output on eof. If readline() is in use,
1295 the arguments are non-NULL and provide the relevant functions.
1296
1297 Arguments:
1298 fn_readline readline function or NULL
1299 fn_addhist addhist function or NULL
1300
1301 Returns: pointer to dynamic memory, or NULL at end of file
1302 */
1303
1304 static uschar *
1305 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1306 {
1307 gstring * g = NULL;
1308
1309 if (!fn_readline) { printf("> "); fflush(stdout); }
1310
1311 for (int i = 0;; i++)
1312 {
1313 uschar buffer[1024];
1314 uschar *p, *ss;
1315
1316 #ifdef USE_READLINE
1317 char *readline_line = NULL;
1318 if (fn_readline)
1319 {
1320 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1321 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1322 p = US readline_line;
1323 }
1324 else
1325 #endif
1326
1327 /* readline() not in use */
1328
1329 {
1330 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1331 p = buffer;
1332 }
1333
1334 /* Handle the line */
1335
1336 ss = p + (int)Ustrlen(p);
1337 while (ss > p && isspace(ss[-1])) ss--;
1338
1339 if (i > 0)
1340 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1341
1342 g = string_catn(g, p, ss - p);
1343
1344 #ifdef USE_READLINE
1345 if (fn_readline) free(readline_line);
1346 #endif
1347
1348 /* g can only be NULL if ss==p */
1349 if (ss == p || g->s[g->ptr-1] != '\\')
1350 break;
1351
1352 --g->ptr;
1353 (void) string_from_gstring(g);
1354 }
1355
1356 if (!g) printf("\n");
1357 return string_from_gstring(g);
1358 }
1359
1360
1361
1362 /*************************************************
1363 * Output usage information for the program *
1364 *************************************************/
1365
1366 /* This function is called when there are no recipients
1367 or a specific --help argument was added.
1368
1369 Arguments:
1370 progname information on what name we were called by
1371
1372 Returns: DOES NOT RETURN
1373 */
1374
1375 static void
1376 exim_usage(uschar *progname)
1377 {
1378
1379 /* Handle specific program invocation variants */
1380 if (Ustrcmp(progname, US"-mailq") == 0)
1381 exim_fail(
1382 "mailq - list the contents of the mail queue\n\n"
1383 "For a list of options, see the Exim documentation.\n");
1384
1385 /* Generic usage - we output this whatever happens */
1386 exim_fail(
1387 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1388 "not directly from a shell command line. Options and/or arguments control\n"
1389 "what it does when called. For a list of options, see the Exim documentation.\n");
1390 }
1391
1392
1393
1394 /*************************************************
1395 * Validate that the macros given are okay *
1396 *************************************************/
1397
1398 /* Typically, Exim will drop privileges if macros are supplied. In some
1399 cases, we want to not do so.
1400
1401 Arguments: opt_D_used - true if the commandline had a "-D" option
1402 Returns: true if trusted, false otherwise
1403 */
1404
1405 static BOOL
1406 macros_trusted(BOOL opt_D_used)
1407 {
1408 #ifdef WHITELIST_D_MACROS
1409 uschar *whitelisted, *end, *p, **whites;
1410 int white_count, i, n;
1411 size_t len;
1412 BOOL prev_char_item, found;
1413 #endif
1414
1415 if (!opt_D_used)
1416 return TRUE;
1417 #ifndef WHITELIST_D_MACROS
1418 return FALSE;
1419 #else
1420
1421 /* We only trust -D overrides for some invoking users:
1422 root, the exim run-time user, the optional config owner user.
1423 I don't know why config-owner would be needed, but since they can own the
1424 config files anyway, there's no security risk to letting them override -D. */
1425 if ( ! ((real_uid == root_uid)
1426 || (real_uid == exim_uid)
1427 #ifdef CONFIGURE_OWNER
1428 || (real_uid == config_uid)
1429 #endif
1430 ))
1431 {
1432 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1433 return FALSE;
1434 }
1435
1436 /* Get a list of macros which are whitelisted */
1437 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1438 prev_char_item = FALSE;
1439 white_count = 0;
1440 for (p = whitelisted; *p != '\0'; ++p)
1441 {
1442 if (*p == ':' || isspace(*p))
1443 {
1444 *p = '\0';
1445 if (prev_char_item)
1446 ++white_count;
1447 prev_char_item = FALSE;
1448 continue;
1449 }
1450 if (!prev_char_item)
1451 prev_char_item = TRUE;
1452 }
1453 end = p;
1454 if (prev_char_item)
1455 ++white_count;
1456 if (!white_count)
1457 return FALSE;
1458 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1459 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1460 {
1461 if (*p != '\0')
1462 {
1463 whites[i++] = p;
1464 if (i == white_count)
1465 break;
1466 while (*p != '\0' && p < end)
1467 ++p;
1468 }
1469 }
1470 whites[i] = NULL;
1471
1472 /* The list of commandline macros should be very short.
1473 Accept the N*M complexity. */
1474 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1475 {
1476 found = FALSE;
1477 for (uschar ** w = whites; *w; ++w)
1478 if (Ustrcmp(*w, m->name) == 0)
1479 {
1480 found = TRUE;
1481 break;
1482 }
1483 if (!found)
1484 return FALSE;
1485 if (!m->replacement)
1486 continue;
1487 if ((len = m->replen) == 0)
1488 continue;
1489 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1490 0, PCRE_EOPT, NULL, 0);
1491 if (n < 0)
1492 {
1493 if (n != PCRE_ERROR_NOMATCH)
1494 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1495 return FALSE;
1496 }
1497 }
1498 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1499 return TRUE;
1500 #endif
1501 }
1502
1503
1504 /*************************************************
1505 * Expansion testing *
1506 *************************************************/
1507
1508 /* Expand and print one item, doing macro-processing.
1509
1510 Arguments:
1511 item line for expansion
1512 */
1513
1514 static void
1515 expansion_test_line(uschar * line)
1516 {
1517 int len;
1518 BOOL dummy_macexp;
1519
1520 Ustrncpy(big_buffer, line, big_buffer_size);
1521 big_buffer[big_buffer_size-1] = '\0';
1522 len = Ustrlen(big_buffer);
1523
1524 (void) macros_expand(0, &len, &dummy_macexp);
1525
1526 if (isupper(big_buffer[0]))
1527 {
1528 if (macro_read_assignment(big_buffer))
1529 printf("Defined macro '%s'\n", mlast->name);
1530 }
1531 else
1532 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1533 else printf("Failed: %s\n", expand_string_message);
1534 }
1535
1536
1537
1538 /*************************************************
1539 * Entry point and high-level code *
1540 *************************************************/
1541
1542 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1543 the appropriate action. All the necessary functions are present in the one
1544 binary. I originally thought one should split it up, but it turns out that so
1545 much of the apparatus is needed in each chunk that one might as well just have
1546 it all available all the time, which then makes the coding easier as well.
1547
1548 Arguments:
1549 argc count of entries in argv
1550 argv argument strings, with argv[0] being the program name
1551
1552 Returns: EXIT_SUCCESS if terminated successfully
1553 EXIT_FAILURE otherwise, except when a message has been sent
1554 to the sender, and -oee was given
1555 */
1556
1557 int
1558 main(int argc, char **cargv)
1559 {
1560 uschar **argv = USS cargv;
1561 int arg_receive_timeout = -1;
1562 int arg_smtp_receive_timeout = -1;
1563 int arg_error_handling = error_handling;
1564 int filter_sfd = -1;
1565 int filter_ufd = -1;
1566 int group_count;
1567 int i, rv;
1568 int list_queue_option = 0;
1569 int msg_action = 0;
1570 int msg_action_arg = -1;
1571 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1572 int queue_only_reason = 0;
1573 #ifdef EXIM_PERL
1574 int perl_start_option = 0;
1575 #endif
1576 int recipients_arg = argc;
1577 int sender_address_domain = 0;
1578 int test_retry_arg = -1;
1579 int test_rewrite_arg = -1;
1580 gid_t original_egid;
1581 BOOL arg_queue_only = FALSE;
1582 BOOL bi_option = FALSE;
1583 BOOL checking = FALSE;
1584 BOOL count_queue = FALSE;
1585 BOOL expansion_test = FALSE;
1586 BOOL extract_recipients = FALSE;
1587 BOOL flag_G = FALSE;
1588 BOOL flag_n = FALSE;
1589 BOOL forced_delivery = FALSE;
1590 BOOL f_end_dot = FALSE;
1591 BOOL deliver_give_up = FALSE;
1592 BOOL list_queue = FALSE;
1593 BOOL list_options = FALSE;
1594 BOOL list_config = FALSE;
1595 BOOL local_queue_only;
1596 BOOL more = TRUE;
1597 BOOL one_msg_action = FALSE;
1598 BOOL opt_D_used = FALSE;
1599 BOOL queue_only_set = FALSE;
1600 BOOL receiving_message = TRUE;
1601 BOOL sender_ident_set = FALSE;
1602 BOOL session_local_queue_only;
1603 BOOL unprivileged;
1604 BOOL removed_privilege = FALSE;
1605 BOOL usage_wanted = FALSE;
1606 BOOL verify_address_mode = FALSE;
1607 BOOL verify_as_sender = FALSE;
1608 BOOL version_printed = FALSE;
1609 uschar *alias_arg = NULL;
1610 uschar *called_as = US"";
1611 uschar *cmdline_syslog_name = NULL;
1612 uschar *start_queue_run_id = NULL;
1613 uschar *stop_queue_run_id = NULL;
1614 uschar *expansion_test_message = NULL;
1615 uschar *ftest_domain = NULL;
1616 uschar *ftest_localpart = NULL;
1617 uschar *ftest_prefix = NULL;
1618 uschar *ftest_suffix = NULL;
1619 uschar *log_oneline = NULL;
1620 uschar *malware_test_file = NULL;
1621 uschar *real_sender_address;
1622 uschar *originator_home = US"/";
1623 size_t sz;
1624 rmark reset_point;
1625
1626 struct passwd *pw;
1627 struct stat statbuf;
1628 pid_t passed_qr_pid = (pid_t)0;
1629 int passed_qr_pipe = -1;
1630 gid_t group_list[EXIM_GROUPLIST_SIZE];
1631
1632 /* For the -bI: flag */
1633 enum commandline_info info_flag = CMDINFO_NONE;
1634 BOOL info_stdout = FALSE;
1635
1636 /* Possible options for -R and -S */
1637
1638 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1639
1640 /* Need to define this in case we need to change the environment in order
1641 to get rid of a bogus time zone. We have to make it char rather than uschar
1642 because some OS define it in /usr/include/unistd.h. */
1643
1644 extern char **environ;
1645
1646 #ifdef MEASURE_TIMING
1647 (void)gettimeofday(&timestamp_startup, NULL);
1648 #endif
1649
1650 /* If the Exim user and/or group and/or the configuration file owner/group were
1651 defined by ref:name at build time, we must now find the actual uid/gid values.
1652 This is a feature to make the lives of binary distributors easier. */
1653
1654 #ifdef EXIM_USERNAME
1655 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1656 {
1657 if (exim_uid == 0)
1658 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1659
1660 /* If ref:name uses a number as the name, route_finduser() returns
1661 TRUE with exim_uid set and pw coerced to NULL. */
1662 if (pw)
1663 exim_gid = pw->pw_gid;
1664 #ifndef EXIM_GROUPNAME
1665 else
1666 exim_fail(
1667 "exim: ref:name should specify a usercode, not a group.\n"
1668 "exim: can't let you get away with it unless you also specify a group.\n");
1669 #endif
1670 }
1671 else
1672 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1673 #endif
1674
1675 #ifdef EXIM_GROUPNAME
1676 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1677 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1678 #endif
1679
1680 #ifdef CONFIGURE_OWNERNAME
1681 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1682 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1683 CONFIGURE_OWNERNAME);
1684 #endif
1685
1686 /* We default the system_filter_user to be the Exim run-time user, as a
1687 sane non-root value. */
1688 system_filter_uid = exim_uid;
1689
1690 #ifdef CONFIGURE_GROUPNAME
1691 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1692 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1693 CONFIGURE_GROUPNAME);
1694 #endif
1695
1696 /* In the Cygwin environment, some initialization used to need doing.
1697 It was fudged in by means of this macro; now no longer but we'll leave
1698 it in case of others. */
1699
1700 #ifdef OS_INIT
1701 OS_INIT
1702 #endif
1703
1704 /* Check a field which is patched when we are running Exim within its
1705 testing harness; do a fast initial check, and then the whole thing. */
1706
1707 f.running_in_test_harness =
1708 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1709 if (f.running_in_test_harness)
1710 debug_store = TRUE;
1711
1712 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1713 at the start of a program; however, it seems that some environments do not
1714 follow this. A "strange" locale can affect the formatting of timestamps, so we
1715 make quite sure. */
1716
1717 setlocale(LC_ALL, "C");
1718
1719 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1720
1721 #ifdef _POSIX_MONOTONIC_CLOCK
1722 exim_clock_init();
1723 #endif
1724
1725 /* Set up the default handler for timing using alarm(). */
1726
1727 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1728
1729 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1730 because store_malloc writes a log entry on failure. */
1731
1732 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1733 exim_fail("exim: failed to get store for log buffer\n");
1734
1735 /* Initialize the default log options. */
1736
1737 bits_set(log_selector, log_selector_size, log_default);
1738
1739 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1740 NULL when the daemon is run and the file is closed. We have to use this
1741 indirection, because some systems don't allow writing to the variable "stderr".
1742 */
1743
1744 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1745
1746 /* Arrange for the PCRE regex library to use our store functions. Note that
1747 the normal calls are actually macros that add additional arguments for
1748 debugging purposes so we have to assign specially constructed functions here.
1749 The default is to use store in the stacking pool, but this is overridden in the
1750 regex_must_compile() function. */
1751
1752 pcre_malloc = function_store_get;
1753 pcre_free = function_dummy_free;
1754
1755 /* Ensure there is a big buffer for temporary use in several places. It is put
1756 in malloc store so that it can be freed for enlargement if necessary. */
1757
1758 big_buffer = store_malloc(big_buffer_size);
1759
1760 /* Set up the handler for the data request signal, and set the initial
1761 descriptive text. */
1762
1763 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1764 set_process_info("initializing");
1765 os_restarting_signal(SIGUSR1, usr1_handler);
1766
1767 /* If running in a dockerized environment, the TERM signal is only
1768 delegated to the PID 1 if we request it by setting an signal handler */
1769 if (getpid() == 1) signal(SIGTERM, term_handler);
1770
1771 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1772 in the daemon code. For the rest of Exim's uses, we ignore it. */
1773
1774 signal(SIGHUP, SIG_IGN);
1775
1776 /* We don't want to die on pipe errors as the code is written to handle
1777 the write error instead. */
1778
1779 signal(SIGPIPE, SIG_IGN);
1780
1781 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1782 set to SIG_IGN. This causes subprocesses that complete before the parent
1783 process waits for them not to hang around, so when Exim calls wait(), nothing
1784 is there. The wait() code has been made robust against this, but let's ensure
1785 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1786 ending status. We use sigaction rather than plain signal() on those OS where
1787 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1788 problem on AIX with this.) */
1789
1790 #ifdef SA_NOCLDWAIT
1791 {
1792 struct sigaction act;
1793 act.sa_handler = SIG_DFL;
1794 sigemptyset(&(act.sa_mask));
1795 act.sa_flags = 0;
1796 sigaction(SIGCHLD, &act, NULL);
1797 }
1798 #else
1799 signal(SIGCHLD, SIG_DFL);
1800 #endif
1801
1802 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1803 SIGHUP. */
1804
1805 sighup_argv = argv;
1806
1807 /* Set up the version number. Set up the leading 'E' for the external form of
1808 message ids, set the pointer to the internal form, and initialize it to
1809 indicate no message being processed. */
1810
1811 version_init();
1812 message_id_option[0] = '-';
1813 message_id_external = message_id_option + 1;
1814 message_id_external[0] = 'E';
1815 message_id = message_id_external + 1;
1816 message_id[0] = 0;
1817
1818 /* Set the umask to zero so that any files Exim creates using open() are
1819 created with the modes that it specifies. NOTE: Files created with fopen() have
1820 a problem, which was not recognized till rather late (February 2006). With this
1821 umask, such files will be world writeable. (They are all content scanning files
1822 in the spool directory, which isn't world-accessible, so this is not a
1823 disaster, but it's untidy.) I don't want to change this overall setting,
1824 however, because it will interact badly with the open() calls. Instead, there's
1825 now a function called modefopen() that fiddles with the umask while calling
1826 fopen(). */
1827
1828 (void)umask(0);
1829
1830 /* Precompile the regular expression for matching a message id. Keep this in
1831 step with the code that generates ids in the accept.c module. We need to do
1832 this here, because the -M options check their arguments for syntactic validity
1833 using mac_ismsgid, which uses this. */
1834
1835 regex_ismsgid =
1836 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1837
1838 /* Precompile the regular expression that is used for matching an SMTP error
1839 code, possibly extended, at the start of an error message. Note that the
1840 terminating whitespace character is included. */
1841
1842 regex_smtp_code =
1843 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1844 FALSE, TRUE);
1845
1846 #ifdef WHITELIST_D_MACROS
1847 /* Precompile the regular expression used to filter the content of macros
1848 given to -D for permissibility. */
1849
1850 regex_whitelisted_macro =
1851 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1852 #endif
1853
1854 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1855
1856 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1857 this seems to be a generally accepted convention, since one finds symbolic
1858 links called "mailq" in standard OS configurations. */
1859
1860 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1861 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1862 {
1863 list_queue = TRUE;
1864 receiving_message = FALSE;
1865 called_as = US"-mailq";
1866 }
1867
1868 /* If the program is called as "rmail" treat it as equivalent to
1869 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1870 i.e. preventing a single dot on a line from terminating the message, and
1871 returning with zero return code, even in cases of error (provided an error
1872 message has been sent). */
1873
1874 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1875 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1876 {
1877 f.dot_ends = FALSE;
1878 called_as = US"-rmail";
1879 errors_sender_rc = EXIT_SUCCESS;
1880 }
1881
1882 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1883 this is a smail convention. */
1884
1885 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1886 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1887 {
1888 smtp_input = smtp_batched_input = TRUE;
1889 called_as = US"-rsmtp";
1890 }
1891
1892 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1893 this is a smail convention. */
1894
1895 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1896 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1897 {
1898 queue_interval = 0;
1899 receiving_message = FALSE;
1900 called_as = US"-runq";
1901 }
1902
1903 /* If the program is called as "newaliases" treat it as equivalent to
1904 "exim -bi"; this is a sendmail convention. */
1905
1906 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1907 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1908 {
1909 bi_option = TRUE;
1910 receiving_message = FALSE;
1911 called_as = US"-newaliases";
1912 }
1913
1914 /* Save the original effective uid for a couple of uses later. It should
1915 normally be root, but in some esoteric environments it may not be. */
1916
1917 original_euid = geteuid();
1918 original_egid = getegid();
1919
1920 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1921 to be the same as the real ones. This makes a difference only if Exim is setuid
1922 (or setgid) to something other than root, which could be the case in some
1923 special configurations. */
1924
1925 real_uid = getuid();
1926 real_gid = getgid();
1927
1928 if (real_uid == root_uid)
1929 {
1930 if ((rv = setgid(real_gid)))
1931 exim_fail("exim: setgid(%ld) failed: %s\n",
1932 (long int)real_gid, strerror(errno));
1933 if ((rv = setuid(real_uid)))
1934 exim_fail("exim: setuid(%ld) failed: %s\n",
1935 (long int)real_uid, strerror(errno));
1936 }
1937
1938 /* If neither the original real uid nor the original euid was root, Exim is
1939 running in an unprivileged state. */
1940
1941 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1942
1943 /* Scan the program's arguments. Some can be dealt with right away; others are
1944 simply recorded for checking and handling afterwards. Do a high-level switch
1945 on the second character (the one after '-'), to save some effort. */
1946
1947 for (i = 1; i < argc; i++)
1948 {
1949 BOOL badarg = FALSE;
1950 uschar *arg = argv[i];
1951 uschar *argrest;
1952 int switchchar;
1953
1954 /* An argument not starting with '-' is the start of a recipients list;
1955 break out of the options-scanning loop. */
1956
1957 if (arg[0] != '-')
1958 {
1959 recipients_arg = i;
1960 break;
1961 }
1962
1963 /* An option consisting of -- terminates the options */
1964
1965 if (Ustrcmp(arg, "--") == 0)
1966 {
1967 recipients_arg = i + 1;
1968 break;
1969 }
1970
1971 /* Handle flagged options */
1972
1973 switchchar = arg[1];
1974 argrest = arg+2;
1975
1976 /* Make all -ex options synonymous with -oex arguments, since that
1977 is assumed by various callers. Also make -qR options synonymous with -R
1978 options, as that seems to be required as well. Allow for -qqR too, and
1979 the same for -S options. */
1980
1981 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1982 Ustrncmp(arg+1, "qR", 2) == 0 ||
1983 Ustrncmp(arg+1, "qS", 2) == 0)
1984 {
1985 switchchar = arg[2];
1986 argrest++;
1987 }
1988 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1989 {
1990 switchchar = arg[3];
1991 argrest += 2;
1992 f.queue_2stage = TRUE;
1993 }
1994
1995 /* Make -r synonymous with -f, since it is a documented alias */
1996
1997 else if (arg[1] == 'r') switchchar = 'f';
1998
1999 /* Make -ov synonymous with -v */
2000
2001 else if (Ustrcmp(arg, "-ov") == 0)
2002 {
2003 switchchar = 'v';
2004 argrest++;
2005 }
2006
2007 /* deal with --option_aliases */
2008 else if (switchchar == '-')
2009 {
2010 if (Ustrcmp(argrest, "help") == 0)
2011 {
2012 usage_wanted = TRUE;
2013 break;
2014 }
2015 else if (Ustrcmp(argrest, "version") == 0)
2016 {
2017 switchchar = 'b';
2018 argrest = US"V";
2019 }
2020 }
2021
2022 /* High-level switch on active initial letter */
2023
2024 switch(switchchar)
2025 {
2026
2027 /* sendmail uses -Ac and -Am to control which .cf file is used;
2028 we ignore them. */
2029 case 'A':
2030 if (*argrest == '\0') { badarg = TRUE; break; }
2031 else
2032 {
2033 BOOL ignore = FALSE;
2034 switch (*argrest)
2035 {
2036 case 'c':
2037 case 'm':
2038 if (*(argrest + 1) == '\0')
2039 ignore = TRUE;
2040 break;
2041 }
2042 if (!ignore) { badarg = TRUE; break; }
2043 }
2044 break;
2045
2046 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2047 so has no need of it. */
2048
2049 case 'B':
2050 if (*argrest == 0) i++; /* Skip over the type */
2051 break;
2052
2053
2054 case 'b':
2055 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2056
2057 /* -bd: Run in daemon mode, awaiting SMTP connections.
2058 -bdf: Ditto, but in the foreground.
2059 */
2060
2061 if (*argrest == 'd')
2062 {
2063 f.daemon_listen = TRUE;
2064 if (*(++argrest) == 'f') f.background_daemon = FALSE;
2065 else if (*argrest != 0) { badarg = TRUE; break; }
2066 }
2067
2068 /* -be: Run in expansion test mode
2069 -bem: Ditto, but read a message from a file first
2070 */
2071
2072 else if (*argrest == 'e')
2073 {
2074 expansion_test = checking = TRUE;
2075 if (argrest[1] == 'm')
2076 {
2077 if (++i >= argc) { badarg = TRUE; break; }
2078 expansion_test_message = argv[i];
2079 argrest++;
2080 }
2081 if (argrest[1] != 0) { badarg = TRUE; break; }
2082 }
2083
2084 /* -bF: Run system filter test */
2085
2086 else if (*argrest == 'F')
2087 {
2088 filter_test |= checking = FTEST_SYSTEM;
2089 if (*(++argrest) != 0) { badarg = TRUE; break; }
2090 if (++i < argc) filter_test_sfile = argv[i]; else
2091 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2092 }
2093
2094 /* -bf: Run user filter test
2095 -bfd: Set domain for filter testing
2096 -bfl: Set local part for filter testing
2097 -bfp: Set prefix for filter testing
2098 -bfs: Set suffix for filter testing
2099 */
2100
2101 else if (*argrest == 'f')
2102 {
2103 if (*(++argrest) == 0)
2104 {
2105 filter_test |= checking = FTEST_USER;
2106 if (++i < argc) filter_test_ufile = argv[i]; else
2107 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2108 }
2109 else
2110 {
2111 if (++i >= argc)
2112 exim_fail("exim: string expected after %s\n", arg);
2113 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2114 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2115 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2116 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2117 else { badarg = TRUE; break; }
2118 }
2119 }
2120
2121 /* -bh: Host checking - an IP address must follow. */
2122
2123 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2124 {
2125 if (++i >= argc) { badarg = TRUE; break; }
2126 sender_host_address = argv[i];
2127 host_checking = checking = f.log_testing_mode = TRUE;
2128 f.host_checking_callout = argrest[1] == 'c';
2129 message_logs = FALSE;
2130 }
2131
2132 /* -bi: This option is used by sendmail to initialize *the* alias file,
2133 though it has the -oA option to specify a different file. Exim has no
2134 concept of *the* alias file, but since Sun's YP make script calls
2135 sendmail this way, some support must be provided. */
2136
2137 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2138
2139 /* -bI: provide information, of the type to follow after a colon.
2140 This is an Exim flag. */
2141
2142 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2143 {
2144 uschar *p = &argrest[2];
2145 info_flag = CMDINFO_HELP;
2146 if (Ustrlen(p))
2147 {
2148 if (strcmpic(p, CUS"sieve") == 0)
2149 {
2150 info_flag = CMDINFO_SIEVE;
2151 info_stdout = TRUE;
2152 }
2153 else if (strcmpic(p, CUS"dscp") == 0)
2154 {
2155 info_flag = CMDINFO_DSCP;
2156 info_stdout = TRUE;
2157 }
2158 else if (strcmpic(p, CUS"help") == 0)
2159 {
2160 info_stdout = TRUE;
2161 }
2162 }
2163 }
2164
2165 /* -bm: Accept and deliver message - the default option. Reinstate
2166 receiving_message, which got turned off for all -b options. */
2167
2168 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2169
2170 /* -bmalware: test the filename given for malware */
2171
2172 else if (Ustrcmp(argrest, "malware") == 0)
2173 {
2174 if (++i >= argc) { badarg = TRUE; break; }
2175 checking = TRUE;
2176 malware_test_file = argv[i];
2177 }
2178
2179 /* -bnq: For locally originating messages, do not qualify unqualified
2180 addresses. In the envelope, this causes errors; in header lines they
2181 just get left. */
2182
2183 else if (Ustrcmp(argrest, "nq") == 0)
2184 {
2185 f.allow_unqualified_sender = FALSE;
2186 f.allow_unqualified_recipient = FALSE;
2187 }
2188
2189 /* -bpxx: List the contents of the mail queue, in various forms. If
2190 the option is -bpc, just a queue count is needed. Otherwise, if the
2191 first letter after p is r, then order is random. */
2192
2193 else if (*argrest == 'p')
2194 {
2195 if (*(++argrest) == 'c')
2196 {
2197 count_queue = TRUE;
2198 if (*(++argrest) != 0) badarg = TRUE;
2199 break;
2200 }
2201
2202 if (*argrest == 'r')
2203 {
2204 list_queue_option = 8;
2205 argrest++;
2206 }
2207 else list_queue_option = 0;
2208
2209 list_queue = TRUE;
2210
2211 /* -bp: List the contents of the mail queue, top-level only */
2212
2213 if (*argrest == 0) {}
2214
2215 /* -bpu: List the contents of the mail queue, top-level undelivered */
2216
2217 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2218
2219 /* -bpa: List the contents of the mail queue, including all delivered */
2220
2221 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2222
2223 /* Unknown after -bp[r] */
2224
2225 else
2226 {
2227 badarg = TRUE;
2228 break;
2229 }
2230 }
2231
2232
2233 /* -bP: List the configuration variables given as the address list.
2234 Force -v, so configuration errors get displayed. */
2235
2236 else if (Ustrcmp(argrest, "P") == 0)
2237 {
2238 /* -bP config: we need to setup here, because later,
2239 * when list_options is checked, the config is read already */
2240 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2241 {
2242 list_config = TRUE;
2243 readconf_save_config(version_string);
2244 }
2245 else
2246 {
2247 list_options = TRUE;
2248 debug_selector |= D_v;
2249 debug_file = stderr;
2250 }
2251 }
2252
2253 /* -brt: Test retry configuration lookup */
2254
2255 else if (Ustrcmp(argrest, "rt") == 0)
2256 {
2257 checking = TRUE;
2258 test_retry_arg = i + 1;
2259 goto END_ARG;
2260 }
2261
2262 /* -brw: Test rewrite configuration */
2263
2264 else if (Ustrcmp(argrest, "rw") == 0)
2265 {
2266 checking = TRUE;
2267 test_rewrite_arg = i + 1;
2268 goto END_ARG;
2269 }
2270
2271 /* -bS: Read SMTP commands on standard input, but produce no replies -
2272 all errors are reported by sending messages. */
2273
2274 else if (Ustrcmp(argrest, "S") == 0)
2275 smtp_input = smtp_batched_input = receiving_message = TRUE;
2276
2277 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2278 on standard output. */
2279
2280 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2281
2282 /* -bt: address testing mode */
2283
2284 else if (Ustrcmp(argrest, "t") == 0)
2285 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2286
2287 /* -bv: verify addresses */
2288
2289 else if (Ustrcmp(argrest, "v") == 0)
2290 verify_address_mode = checking = f.log_testing_mode = TRUE;
2291
2292 /* -bvs: verify sender addresses */
2293
2294 else if (Ustrcmp(argrest, "vs") == 0)
2295 {
2296 verify_address_mode = checking = f.log_testing_mode = TRUE;
2297 verify_as_sender = TRUE;
2298 }
2299
2300 /* -bV: Print version string and support details */
2301
2302 else if (Ustrcmp(argrest, "V") == 0)
2303 {
2304 printf("Exim version %s #%s built %s\n", version_string,
2305 version_cnumber, version_date);
2306 printf("%s\n", CS version_copyright);
2307 version_printed = TRUE;
2308 show_whats_supported(stdout);
2309 f.log_testing_mode = TRUE;
2310 }
2311
2312 /* -bw: inetd wait mode, accept a listening socket as stdin */
2313
2314 else if (*argrest == 'w')
2315 {
2316 f.inetd_wait_mode = TRUE;
2317 f.background_daemon = FALSE;
2318 f.daemon_listen = TRUE;
2319 if (*(++argrest) != '\0')
2320 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2321 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2322 }
2323
2324 else badarg = TRUE;
2325 break;
2326
2327
2328 /* -C: change configuration file list; ignore if it isn't really
2329 a change! Enforce a prefix check if required. */
2330
2331 case 'C':
2332 if (*argrest == 0)
2333 {
2334 if(++i < argc) argrest = argv[i]; else
2335 { badarg = TRUE; break; }
2336 }
2337 if (Ustrcmp(config_main_filelist, argrest) != 0)
2338 {
2339 #ifdef ALT_CONFIG_PREFIX
2340 int sep = 0;
2341 int len = Ustrlen(ALT_CONFIG_PREFIX);
2342 const uschar *list = argrest;
2343 uschar *filename;
2344 while((filename = string_nextinlist(&list, &sep, big_buffer,
2345 big_buffer_size)) != NULL)
2346 {
2347 if ((Ustrlen(filename) < len ||
2348 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2349 Ustrstr(filename, "/../") != NULL) &&
2350 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2351 exim_fail("-C Permission denied\n");
2352 }
2353 #endif
2354 if (real_uid != root_uid)
2355 {
2356 #ifdef TRUSTED_CONFIG_LIST
2357
2358 if (real_uid != exim_uid
2359 #ifdef CONFIGURE_OWNER
2360 && real_uid != config_uid
2361 #endif
2362 )
2363 f.trusted_config = FALSE;
2364 else
2365 {
2366 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2367 if (trust_list)
2368 {
2369 struct stat statbuf;
2370
2371 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2372 (statbuf.st_uid != root_uid /* owner not root */
2373 #ifdef CONFIGURE_OWNER
2374 && statbuf.st_uid != config_uid /* owner not the special one */
2375 #endif
2376 ) || /* or */
2377 (statbuf.st_gid != root_gid /* group not root */
2378 #ifdef CONFIGURE_GROUP
2379 && statbuf.st_gid != config_gid /* group not the special one */
2380 #endif
2381 && (statbuf.st_mode & 020) != 0 /* group writeable */
2382 ) || /* or */
2383 (statbuf.st_mode & 2) != 0) /* world writeable */
2384 {
2385 f.trusted_config = FALSE;
2386 fclose(trust_list);
2387 }
2388 else
2389 {
2390 /* Well, the trust list at least is up to scratch... */
2391 rmark reset_point = store_mark();
2392 uschar *trusted_configs[32];
2393 int nr_configs = 0;
2394 int i = 0;
2395
2396 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2397 {
2398 uschar *start = big_buffer, *nl;
2399 while (*start && isspace(*start))
2400 start++;
2401 if (*start != '/')
2402 continue;
2403 nl = Ustrchr(start, '\n');
2404 if (nl)
2405 *nl = 0;
2406 trusted_configs[nr_configs++] = string_copy(start);
2407 if (nr_configs == 32)
2408 break;
2409 }
2410 fclose(trust_list);
2411
2412 if (nr_configs)
2413 {
2414 int sep = 0;
2415 const uschar *list = argrest;
2416 uschar *filename;
2417 while (f.trusted_config && (filename = string_nextinlist(&list,
2418 &sep, big_buffer, big_buffer_size)) != NULL)
2419 {
2420 for (i=0; i < nr_configs; i++)
2421 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2422 break;
2423 if (i == nr_configs)
2424 {
2425 f.trusted_config = FALSE;
2426 break;
2427 }
2428 }
2429 }
2430 else /* No valid prefixes found in trust_list file. */
2431 f.trusted_config = FALSE;
2432 store_reset(reset_point);
2433 }
2434 }
2435 else /* Could not open trust_list file. */
2436 f.trusted_config = FALSE;
2437 }
2438 #else
2439 /* Not root; don't trust config */
2440 f.trusted_config = FALSE;
2441 #endif
2442 }
2443
2444 config_main_filelist = argrest;
2445 f.config_changed = TRUE;
2446 }
2447 break;
2448
2449
2450 /* -D: set up a macro definition */
2451
2452 case 'D':
2453 #ifdef DISABLE_D_OPTION
2454 exim_fail("exim: -D is not available in this Exim binary\n");
2455 #else
2456 {
2457 int ptr = 0;
2458 macro_item *m;
2459 uschar name[24];
2460 uschar *s = argrest;
2461
2462 opt_D_used = TRUE;
2463 while (isspace(*s)) s++;
2464
2465 if (*s < 'A' || *s > 'Z')
2466 exim_fail("exim: macro name set by -D must start with "
2467 "an upper case letter\n");
2468
2469 while (isalnum(*s) || *s == '_')
2470 {
2471 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2472 s++;
2473 }
2474 name[ptr] = 0;
2475 if (ptr == 0) { badarg = TRUE; break; }
2476 while (isspace(*s)) s++;
2477 if (*s != 0)
2478 {
2479 if (*s++ != '=') { badarg = TRUE; break; }
2480 while (isspace(*s)) s++;
2481 }
2482
2483 for (m = macros_user; m; m = m->next)
2484 if (Ustrcmp(m->name, name) == 0)
2485 exim_fail("exim: duplicated -D in command line\n");
2486
2487 m = macro_create(name, s, TRUE);
2488
2489 if (clmacro_count >= MAX_CLMACROS)
2490 exim_fail("exim: too many -D options on command line\n");
2491 clmacros[clmacro_count++] =
2492 string_sprintf("-D%s=%s", m->name, m->replacement);
2493 }
2494 #endif
2495 break;
2496
2497 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2498 The latter is now a no-op, retained for compatibility only. If -dd is used,
2499 debugging subprocesses of the daemon is disabled. */
2500
2501 case 'd':
2502 if (Ustrcmp(argrest, "ropcr") == 0)
2503 {
2504 /* drop_cr = TRUE; */
2505 }
2506
2507 /* Use an intermediate variable so that we don't set debugging while
2508 decoding the debugging bits. */
2509
2510 else
2511 {
2512 unsigned int selector = D_default;
2513 debug_selector = 0;
2514 debug_file = NULL;
2515 if (*argrest == 'd')
2516 {
2517 f.debug_daemon = TRUE;
2518 argrest++;
2519 }
2520 if (*argrest != 0)
2521 decode_bits(&selector, 1, debug_notall, argrest,
2522 debug_options, debug_options_count, US"debug", 0);
2523 debug_selector = selector;
2524 }
2525 break;
2526
2527
2528 /* -E: This is a local error message. This option is not intended for
2529 external use at all, but is not restricted to trusted callers because it
2530 does no harm (just suppresses certain error messages) and if Exim is run
2531 not setuid root it won't always be trusted when it generates error
2532 messages using this option. If there is a message id following -E, point
2533 message_reference at it, for logging. */
2534
2535 case 'E':
2536 f.local_error_message = TRUE;
2537 if (mac_ismsgid(argrest)) message_reference = argrest;
2538 break;
2539
2540
2541 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2542 option, so it looks as if historically the -oex options are also callable
2543 without the leading -o. So we have to accept them. Before the switch,
2544 anything starting -oe has been converted to -e. Exim does not support all
2545 of the sendmail error options. */
2546
2547 case 'e':
2548 if (Ustrcmp(argrest, "e") == 0)
2549 {
2550 arg_error_handling = ERRORS_SENDER;
2551 errors_sender_rc = EXIT_SUCCESS;
2552 }
2553 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2554 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2555 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2556 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2557 else badarg = TRUE;
2558 break;
2559
2560
2561 /* -F: Set sender's full name, used instead of the gecos entry from
2562 the password file. Since users can usually alter their gecos entries,
2563 there's no security involved in using this instead. The data can follow
2564 the -F or be in the next argument. */
2565
2566 case 'F':
2567 if (*argrest == 0)
2568 {
2569 if(++i < argc) argrest = argv[i]; else
2570 { badarg = TRUE; break; }
2571 }
2572 originator_name = argrest;
2573 f.sender_name_forced = TRUE;
2574 break;
2575
2576
2577 /* -f: Set sender's address - this value is only actually used if Exim is
2578 run by a trusted user, or if untrusted_set_sender is set and matches the
2579 address, except that the null address can always be set by any user. The
2580 test for this happens later, when the value given here is ignored when not
2581 permitted. For an untrusted user, the actual sender is still put in Sender:
2582 if it doesn't match the From: header (unless no_local_from_check is set).
2583 The data can follow the -f or be in the next argument. The -r switch is an
2584 obsolete form of -f but since there appear to be programs out there that
2585 use anything that sendmail has ever supported, better accept it - the
2586 synonymizing is done before the switch above.
2587
2588 At this stage, we must allow domain literal addresses, because we don't
2589 know what the setting of allow_domain_literals is yet. Ditto for trailing
2590 dots and strip_trailing_dot. */
2591
2592 case 'f':
2593 {
2594 int dummy_start, dummy_end;
2595 uschar *errmess;
2596 if (*argrest == 0)
2597 {
2598 if (i+1 < argc) argrest = argv[++i]; else
2599 { badarg = TRUE; break; }
2600 }
2601 if (*argrest == 0)
2602 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2603 else
2604 {
2605 uschar *temp = argrest + Ustrlen(argrest) - 1;
2606 while (temp >= argrest && isspace(*temp)) temp--;
2607 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2608 allow_domain_literals = TRUE;
2609 strip_trailing_dot = TRUE;
2610 #ifdef SUPPORT_I18N
2611 allow_utf8_domains = TRUE;
2612 #endif
2613 sender_address = parse_extract_address(argrest, &errmess,
2614 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2615 sender_address = string_copy_taint(sender_address, TRUE);
2616 #ifdef SUPPORT_I18N
2617 message_smtputf8 = string_is_utf8(sender_address);
2618 allow_utf8_domains = FALSE;
2619 #endif
2620 allow_domain_literals = FALSE;
2621 strip_trailing_dot = FALSE;
2622 if (!sender_address)
2623 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2624 }
2625 f.sender_address_forced = TRUE;
2626 }
2627 break;
2628
2629 /* -G: sendmail invocation to specify that it's a gateway submission and
2630 sendmail may complain about problems instead of fixing them.
2631 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2632 not at this time complain about problems. */
2633
2634 case 'G':
2635 flag_G = TRUE;
2636 break;
2637
2638 /* -h: Set the hop count for an incoming message. Exim does not currently
2639 support this; it always computes it by counting the Received: headers.
2640 To put it in will require a change to the spool header file format. */
2641
2642 case 'h':
2643 if (*argrest == 0)
2644 {
2645 if(++i < argc) argrest = argv[i]; else
2646 { badarg = TRUE; break; }
2647 }
2648 if (!isdigit(*argrest)) badarg = TRUE;
2649 break;
2650
2651
2652 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2653 not to be documented for sendmail but mailx (at least) uses it) */
2654
2655 case 'i':
2656 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2657 break;
2658
2659
2660 /* -L: set the identifier used for syslog; equivalent to setting
2661 syslog_processname in the config file, but needs to be an admin option. */
2662
2663 case 'L':
2664 if (*argrest == '\0')
2665 {
2666 if(++i < argc) argrest = argv[i]; else
2667 { badarg = TRUE; break; }
2668 }
2669 if ((sz = Ustrlen(argrest)) > 32)
2670 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2671 if (sz < 1)
2672 exim_fail("exim: the -L syslog name is too short\n");
2673 cmdline_syslog_name = argrest;
2674 break;
2675
2676 case 'M':
2677 receiving_message = FALSE;
2678
2679 /* -MC: continue delivery of another message via an existing open
2680 file descriptor. This option is used for an internal call by the
2681 smtp transport when there is a pending message waiting to go to an
2682 address to which it has got a connection. Five subsequent arguments are
2683 required: transport name, host name, IP address, sequence number, and
2684 message_id. Transports may decline to create new processes if the sequence
2685 number gets too big. The channel is stdin. This (-MC) must be the last
2686 argument. There's a subsequent check that the real-uid is privileged.
2687
2688 If we are running in the test harness. delay for a bit, to let the process
2689 that set this one up complete. This makes for repeatability of the logging,
2690 etc. output. */
2691
2692 if (Ustrcmp(argrest, "C") == 0)
2693 {
2694 union sockaddr_46 interface_sock;
2695 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2696
2697 if (argc != i + 6)
2698 exim_fail("exim: too many or too few arguments after -MC\n");
2699
2700 if (msg_action_arg >= 0)
2701 exim_fail("exim: incompatible arguments\n");
2702
2703 continue_transport = argv[++i];
2704 continue_hostname = argv[++i];
2705 continue_host_address = argv[++i];
2706 continue_sequence = Uatoi(argv[++i]);
2707 msg_action = MSG_DELIVER;
2708 msg_action_arg = ++i;
2709 forced_delivery = TRUE;
2710 queue_run_pid = passed_qr_pid;
2711 queue_run_pipe = passed_qr_pipe;
2712
2713 if (!mac_ismsgid(argv[i]))
2714 exim_fail("exim: malformed message id %s after -MC option\n",
2715 argv[i]);
2716
2717 /* Set up $sending_ip_address and $sending_port, unless proxied */
2718
2719 if (!continue_proxy_cipher)
2720 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2721 &size) == 0)
2722 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2723 &sending_port);
2724 else
2725 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2726 strerror(errno));
2727
2728 testharness_pause_ms(500);
2729 break;
2730 }
2731
2732 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2733 {
2734 switch(argrest[1])
2735 {
2736 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2737 precedes -MC (see above). The flag indicates that the host to which
2738 Exim is connected has accepted an AUTH sequence. */
2739
2740 case 'A': f.smtp_authenticated = TRUE; break;
2741
2742 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2743 that exim is connected to supports the esmtp extension DSN */
2744
2745 case 'D': smtp_peer_options |= OPTION_DSN; break;
2746
2747 /* -MCG: set the queue name, to a non-default value */
2748
2749 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2750 else badarg = TRUE;
2751 break;
2752
2753 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2754
2755 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2756
2757 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2758 it preceded -MC (see above) */
2759
2760 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2761
2762 /* -MCQ: pass on the pid of the queue-running process that started
2763 this chain of deliveries and the fd of its synchronizing pipe; this
2764 is useful only when it precedes -MC (see above) */
2765
2766 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2767 else badarg = TRUE;
2768 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2769 else badarg = TRUE;
2770 break;
2771
2772 /* -MCS: set the smtp_use_size flag; this is useful only when it
2773 precedes -MC (see above) */
2774
2775 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2776
2777 #ifndef DISABLE_TLS
2778 /* -MCt: similar to -MCT below but the connection is still open
2779 via a proxy process which handles the TLS context and coding.
2780 Require three arguments for the proxied local address and port,
2781 and the TLS cipher. */
2782
2783 case 't': if (++i < argc) sending_ip_address = argv[i];
2784 else badarg = TRUE;
2785 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2786 else badarg = TRUE;
2787 if (++i < argc) continue_proxy_cipher = argv[i];
2788 else badarg = TRUE;
2789 /*FALLTHROUGH*/
2790
2791 /* -MCT: set the tls_offered flag; this is useful only when it
2792 precedes -MC (see above). The flag indicates that the host to which
2793 Exim is connected has offered TLS support. */
2794
2795 case 'T': smtp_peer_options |= OPTION_TLS; break;
2796 #endif
2797
2798 default: badarg = TRUE; break;
2799 }
2800 break;
2801 }
2802
2803 /* -M[x]: various operations on the following list of message ids:
2804 -M deliver the messages, ignoring next retry times and thawing
2805 -Mc deliver the messages, checking next retry times, no thawing
2806 -Mf freeze the messages
2807 -Mg give up on the messages
2808 -Mt thaw the messages
2809 -Mrm remove the messages
2810 In the above cases, this must be the last option. There are also the
2811 following options which are followed by a single message id, and which
2812 act on that message. Some of them use the "recipient" addresses as well.
2813 -Mar add recipient(s)
2814 -Mmad mark all recipients delivered
2815 -Mmd mark recipients(s) delivered
2816 -Mes edit sender
2817 -Mset load a message for use with -be
2818 -Mvb show body
2819 -Mvc show copy (of whole message, in RFC 2822 format)
2820 -Mvh show header
2821 -Mvl show log
2822 */
2823
2824 else if (*argrest == 0)
2825 {
2826 msg_action = MSG_DELIVER;
2827 forced_delivery = f.deliver_force_thaw = TRUE;
2828 }
2829 else if (Ustrcmp(argrest, "ar") == 0)
2830 {
2831 msg_action = MSG_ADD_RECIPIENT;
2832 one_msg_action = TRUE;
2833 }
2834 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2835 else if (Ustrcmp(argrest, "es") == 0)
2836 {
2837 msg_action = MSG_EDIT_SENDER;
2838 one_msg_action = TRUE;
2839 }
2840 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2841 else if (Ustrcmp(argrest, "g") == 0)
2842 {
2843 msg_action = MSG_DELIVER;
2844 deliver_give_up = TRUE;
2845 }
2846 else if (Ustrcmp(argrest, "G") == 0)
2847 {
2848 msg_action = MSG_SETQUEUE;
2849 queue_name_dest = argv[++i];
2850 }
2851 else if (Ustrcmp(argrest, "mad") == 0)
2852 {
2853 msg_action = MSG_MARK_ALL_DELIVERED;
2854 }
2855 else if (Ustrcmp(argrest, "md") == 0)
2856 {
2857 msg_action = MSG_MARK_DELIVERED;
2858 one_msg_action = TRUE;
2859 }
2860 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2861 else if (Ustrcmp(argrest, "set") == 0)
2862 {
2863 msg_action = MSG_LOAD;
2864 one_msg_action = TRUE;
2865 }
2866 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2867 else if (Ustrcmp(argrest, "vb") == 0)
2868 {
2869 msg_action = MSG_SHOW_BODY;
2870 one_msg_action = TRUE;
2871 }
2872 else if (Ustrcmp(argrest, "vc") == 0)
2873 {
2874 msg_action = MSG_SHOW_COPY;
2875 one_msg_action = TRUE;
2876 }
2877 else if (Ustrcmp(argrest, "vh") == 0)
2878 {
2879 msg_action = MSG_SHOW_HEADER;
2880 one_msg_action = TRUE;
2881 }
2882 else if (Ustrcmp(argrest, "vl") == 0)
2883 {
2884 msg_action = MSG_SHOW_LOG;
2885 one_msg_action = TRUE;
2886 }
2887 else { badarg = TRUE; break; }
2888
2889 /* All the -Mxx options require at least one message id. */
2890
2891 msg_action_arg = i + 1;
2892 if (msg_action_arg >= argc)
2893 exim_fail("exim: no message ids given after %s option\n", arg);
2894
2895 /* Some require only message ids to follow */
2896
2897 if (!one_msg_action)
2898 {
2899 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2900 exim_fail("exim: malformed message id %s after %s option\n",
2901 argv[j], arg);
2902 goto END_ARG; /* Remaining args are ids */
2903 }
2904
2905 /* Others require only one message id, possibly followed by addresses,
2906 which will be handled as normal arguments. */
2907
2908 else
2909 {
2910 if (!mac_ismsgid(argv[msg_action_arg]))
2911 exim_fail("exim: malformed message id %s after %s option\n",
2912 argv[msg_action_arg], arg);
2913 i++;
2914 }
2915 break;
2916
2917
2918 /* Some programs seem to call the -om option without the leading o;
2919 for sendmail it askes for "me too". Exim always does this. */
2920
2921 case 'm':
2922 if (*argrest != 0) badarg = TRUE;
2923 break;
2924
2925
2926 /* -N: don't do delivery - a debugging option that stops transports doing
2927 their thing. It implies debugging at the D_v level. */
2928
2929 case 'N':
2930 if (*argrest == 0)
2931 {
2932 f.dont_deliver = TRUE;
2933 debug_selector |= D_v;
2934 debug_file = stderr;
2935 }
2936 else badarg = TRUE;
2937 break;
2938
2939
2940 /* -n: This means "don't alias" in sendmail, apparently.
2941 For normal invocations, it has no effect.
2942 It may affect some other options. */
2943
2944 case 'n':
2945 flag_n = TRUE;
2946 break;
2947
2948 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2949 option to the specified value. This form uses long names. We need to handle
2950 -O option=value and -Ooption=value. */
2951
2952 case 'O':
2953 if (*argrest == 0)
2954 {
2955 if (++i >= argc)
2956 exim_fail("exim: string expected after -O\n");
2957 }
2958 break;
2959
2960 case 'o':
2961
2962 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2963 file" option). */
2964
2965 if (*argrest == 'A')
2966 {
2967 alias_arg = argrest + 1;
2968 if (alias_arg[0] == 0)
2969 {
2970 if (i+1 < argc) alias_arg = argv[++i]; else
2971 exim_fail("exim: string expected after -oA\n");
2972 }
2973 }
2974
2975 /* -oB: Set a connection message max value for remote deliveries */
2976
2977 else if (*argrest == 'B')
2978 {
2979 uschar *p = argrest + 1;
2980 if (p[0] == 0)
2981 {
2982 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2983 {
2984 connection_max_messages = 1;
2985 p = NULL;
2986 }
2987 }
2988
2989 if (p != NULL)
2990 {
2991 if (!isdigit(*p))
2992 exim_fail("exim: number expected after -oB\n");
2993 connection_max_messages = Uatoi(p);
2994 }
2995 }
2996
2997 /* -odb: background delivery */
2998
2999 else if (Ustrcmp(argrest, "db") == 0)
3000 {
3001 f.synchronous_delivery = FALSE;
3002 arg_queue_only = FALSE;
3003 queue_only_set = TRUE;
3004 }
3005
3006 /* -odf: foreground delivery (smail-compatible option); same effect as
3007 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3008 */
3009
3010 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
3011 {
3012 f.synchronous_delivery = TRUE;
3013 arg_queue_only = FALSE;
3014 queue_only_set = TRUE;
3015 }
3016
3017 /* -odq: queue only */
3018
3019 else if (Ustrcmp(argrest, "dq") == 0)
3020 {
3021 f.synchronous_delivery = FALSE;
3022 arg_queue_only = TRUE;
3023 queue_only_set = TRUE;
3024 }
3025
3026 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3027 but no remote delivery */
3028
3029 else if (Ustrcmp(argrest, "dqs") == 0)
3030 {
3031 f.queue_smtp = TRUE;
3032 arg_queue_only = FALSE;
3033 queue_only_set = TRUE;
3034 }
3035
3036 /* -oex: Sendmail error flags. As these are also accepted without the
3037 leading -o prefix, for compatibility with vacation and other callers,
3038 they are handled with -e above. */
3039
3040 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3041 -oitrue: Another sendmail syntax for the same */
3042
3043 else if (Ustrcmp(argrest, "i") == 0 ||
3044 Ustrcmp(argrest, "itrue") == 0)
3045 f.dot_ends = FALSE;
3046
3047 /* -oM*: Set various characteristics for an incoming message; actually
3048 acted on for trusted callers only. */
3049
3050 else if (*argrest == 'M')
3051 {
3052 if (i+1 >= argc)
3053 exim_fail("exim: data expected after -o%s\n", argrest);
3054
3055 /* -oMa: Set sender host address */
3056
3057 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3058
3059 /* -oMaa: Set authenticator name */
3060
3061 else if (Ustrcmp(argrest, "Maa") == 0)
3062 sender_host_authenticated = argv[++i];
3063
3064 /* -oMas: setting authenticated sender */
3065
3066 else if (Ustrcmp(argrest, "Mas") == 0)
3067 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3068
3069 /* -oMai: setting authenticated id */
3070
3071 else if (Ustrcmp(argrest, "Mai") == 0)
3072 authenticated_id = string_copy_taint(argv[++i], TRUE);
3073
3074 /* -oMi: Set incoming interface address */
3075
3076 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3077
3078 /* -oMm: Message reference */
3079
3080 else if (Ustrcmp(argrest, "Mm") == 0)
3081 {
3082 if (!mac_ismsgid(argv[i+1]))
3083 exim_fail("-oMm must be a valid message ID\n");
3084 if (!f.trusted_config)
3085 exim_fail("-oMm must be called by a trusted user/config\n");
3086 message_reference = argv[++i];
3087 }
3088
3089 /* -oMr: Received protocol */
3090
3091 else if (Ustrcmp(argrest, "Mr") == 0)
3092
3093 if (received_protocol)
3094 exim_fail("received_protocol is set already\n");
3095 else
3096 received_protocol = argv[++i];
3097
3098 /* -oMs: Set sender host name */
3099
3100 else if (Ustrcmp(argrest, "Ms") == 0)
3101 sender_host_name = string_copy_taint(argv[++i], TRUE);
3102
3103 /* -oMt: Set sender ident */
3104
3105 else if (Ustrcmp(argrest, "Mt") == 0)
3106 {
3107 sender_ident_set = TRUE;
3108 sender_ident = argv[++i];
3109 }
3110
3111 /* Else a bad argument */
3112
3113 else
3114 {
3115 badarg = TRUE;
3116 break;
3117 }
3118 }
3119
3120 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3121 seem to call this as -m (undocumented), so that is also accepted (see
3122 above). */
3123
3124 else if (Ustrcmp(argrest, "m") == 0) {}
3125
3126 /* -oo: An ancient flag for old-style addresses which still seems to
3127 crop up in some calls (see in SCO). */
3128
3129 else if (Ustrcmp(argrest, "o") == 0) {}
3130
3131 /* -oP <name>: set pid file path for daemon
3132 -oPX: delete pid file of daemon */
3133
3134 else if (Ustrcmp(argrest, "P") == 0)
3135 override_pid_file_path = argv[++i];
3136
3137 else if (Ustrcmp(argrest, "PX") == 0)
3138 delete_pid_file();
3139
3140 /* -or <n>: set timeout for non-SMTP acceptance
3141 -os <n>: set timeout for SMTP acceptance */
3142
3143 else if (*argrest == 'r' || *argrest == 's')
3144 {
3145 int *tp = (*argrest == 'r')?
3146 &arg_receive_timeout : &arg_smtp_receive_timeout;
3147 if (argrest[1] == 0)
3148 {
3149 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3150 }
3151 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3152 if (*tp < 0)
3153 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3154 }
3155
3156 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3157
3158 else if (Ustrcmp(argrest, "X") == 0)
3159 override_local_interfaces = argv[++i];
3160
3161 /* Unknown -o argument */
3162
3163 else badarg = TRUE;
3164 break;
3165
3166
3167 /* -ps: force Perl startup; -pd force delayed Perl startup */
3168
3169 case 'p':
3170 #ifdef EXIM_PERL
3171 if (*argrest == 's' && argrest[1] == 0)
3172 {
3173 perl_start_option = 1;
3174 break;
3175 }
3176 if (*argrest == 'd' && argrest[1] == 0)
3177 {
3178 perl_start_option = -1;
3179 break;
3180 }
3181 #endif
3182
3183 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3184 which sets the host protocol and host name */
3185
3186 if (*argrest == 0)
3187 if (i+1 < argc)
3188 argrest = argv[++i];
3189 else
3190 { badarg = TRUE; break; }
3191
3192 if (*argrest != 0)
3193 {
3194 uschar *hn;
3195
3196 if (received_protocol)
3197 exim_fail("received_protocol is set already\n");
3198
3199 hn = Ustrchr(argrest, ':');
3200 if (hn == NULL)
3201 received_protocol = argrest;
3202 else
3203 {
3204 int old_pool = store_pool;
3205 store_pool = POOL_PERM;
3206 received_protocol = string_copyn(argrest, hn - argrest);
3207 store_pool = old_pool;
3208 sender_host_name = hn + 1;
3209 }
3210 }
3211 break;
3212
3213
3214 case 'q':
3215 receiving_message = FALSE;
3216 if (queue_interval >= 0)
3217 exim_fail("exim: -q specified more than once\n");
3218
3219 /* -qq...: Do queue runs in a 2-stage manner */
3220
3221 if (*argrest == 'q')
3222 {
3223 f.queue_2stage = TRUE;
3224 argrest++;
3225 }
3226
3227 /* -qi...: Do only first (initial) deliveries */
3228
3229 if (*argrest == 'i')
3230 {
3231 f.queue_run_first_delivery = TRUE;
3232 argrest++;
3233 }
3234
3235 /* -qf...: Run the queue, forcing deliveries
3236 -qff..: Ditto, forcing thawing as well */
3237
3238 if (*argrest == 'f')
3239 {
3240 f.queue_run_force = TRUE;
3241 if (*++argrest == 'f')
3242 {
3243 f.deliver_force_thaw = TRUE;
3244 argrest++;
3245 }
3246 }
3247
3248 /* -q[f][f]l...: Run the queue only on local deliveries */
3249
3250 if (*argrest == 'l')
3251 {
3252 f.queue_run_local = TRUE;
3253 argrest++;
3254 }
3255
3256 /* -q[f][f][l][G<name>]... Work on the named queue */
3257
3258 if (*argrest == 'G')
3259 {
3260 int i;
3261 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3262 queue_name = string_copyn(argrest, i);
3263 argrest += i;
3264 if (*argrest == '/') argrest++;
3265 }
3266
3267 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3268 only, optionally named, optionally starting from a given message id. */
3269
3270 if (!(list_queue || count_queue))
3271 if (*argrest == 0
3272 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3273 {
3274 queue_interval = 0;
3275 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3276 start_queue_run_id = argv[++i];
3277 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3278 stop_queue_run_id = argv[++i];
3279 }
3280
3281 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3282 forced, optionally local only, optionally named. */
3283
3284 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3285 0, FALSE)) <= 0)
3286 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3287 break;
3288
3289
3290 case 'R': /* Synonymous with -qR... */
3291 receiving_message = FALSE;
3292
3293 /* -Rf: As -R (below) but force all deliveries,
3294 -Rff: Ditto, but also thaw all frozen messages,
3295 -Rr: String is regex
3296 -Rrf: Regex and force
3297 -Rrff: Regex and force and thaw
3298
3299 in all cases provided there are no further characters in this
3300 argument. */
3301
3302 if (*argrest != 0)
3303 for (int i = 0; i < nelem(rsopts); i++)
3304 if (Ustrcmp(argrest, rsopts[i]) == 0)
3305 {
3306 if (i != 2) f.queue_run_force = TRUE;
3307 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3308 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3309 argrest += Ustrlen(rsopts[i]);
3310 }
3311
3312 /* -R: Set string to match in addresses for forced queue run to
3313 pick out particular messages. */
3314
3315 if (*argrest)
3316 deliver_selectstring = argrest;
3317 else if (i+1 < argc)
3318 deliver_selectstring = argv[++i];
3319 else
3320 exim_fail("exim: string expected after -R\n");
3321 break;
3322
3323
3324 /* -r: an obsolete synonym for -f (see above) */
3325
3326
3327 /* -S: Like -R but works on sender. */
3328
3329 case 'S': /* Synonymous with -qS... */
3330 receiving_message = FALSE;
3331
3332 /* -Sf: As -S (below) but force all deliveries,
3333 -Sff: Ditto, but also thaw all frozen messages,
3334 -Sr: String is regex
3335 -Srf: Regex and force
3336 -Srff: Regex and force and thaw
3337
3338 in all cases provided there are no further characters in this
3339 argument. */
3340
3341 if (*argrest)
3342 for (int i = 0; i < nelem(rsopts); i++)
3343 if (Ustrcmp(argrest, rsopts[i]) == 0)
3344 {
3345 if (i != 2) f.queue_run_force = TRUE;
3346 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3347 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3348 argrest += Ustrlen(rsopts[i]);
3349 }
3350
3351 /* -S: Set string to match in addresses for forced queue run to
3352 pick out particular messages. */
3353
3354 if (*argrest)
3355 deliver_selectstring_sender = argrest;
3356 else if (i+1 < argc)
3357 deliver_selectstring_sender = argv[++i];
3358 else
3359 exim_fail("exim: string expected after -S\n");
3360 break;
3361
3362 /* -Tqt is an option that is exclusively for use by the testing suite.
3363 It is not recognized in other circumstances. It allows for the setting up
3364 of explicit "queue times" so that various warning/retry things can be
3365 tested. Otherwise variability of clock ticks etc. cause problems. */
3366
3367 case 'T':
3368 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3369 fudged_queue_times = argv[++i];
3370 else badarg = TRUE;
3371 break;
3372
3373
3374 /* -t: Set flag to extract recipients from body of message. */
3375
3376 case 't':
3377 if (*argrest == 0) extract_recipients = TRUE;
3378
3379 /* -ti: Set flag to extract recipients from body of message, and also
3380 specify that dot does not end the message. */
3381
3382 else if (Ustrcmp(argrest, "i") == 0)
3383 {
3384 extract_recipients = TRUE;
3385 f.dot_ends = FALSE;
3386 }
3387
3388 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3389
3390 #ifndef DISABLE_TLS
3391 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3392 #endif
3393
3394 else badarg = TRUE;
3395 break;
3396
3397
3398 /* -U: This means "initial user submission" in sendmail, apparently. The
3399 doc claims that in future sendmail may refuse syntactically invalid
3400 messages instead of fixing them. For the moment, we just ignore it. */
3401
3402 case 'U':
3403 break;
3404
3405
3406 /* -v: verify things - this is a very low-level debugging */
3407
3408 case 'v':
3409 if (*argrest == 0)
3410 {
3411 debug_selector |= D_v;
3412 debug_file = stderr;
3413 }
3414 else badarg = TRUE;
3415 break;
3416
3417
3418 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3419
3420 The -x flag tells the sendmail command that mail from a local
3421 mail program has National Language Support (NLS) extended characters
3422 in the body of the mail item. The sendmail command can send mail with
3423 extended NLS characters across networks that normally corrupts these
3424 8-bit characters.
3425
3426 As Exim is 8-bit clean, it just ignores this flag. */
3427
3428 case 'x':
3429 if (*argrest != 0) badarg = TRUE;
3430 break;
3431
3432 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3433 logs to that file. We swallow the parameter and otherwise ignore it. */
3434
3435 case 'X':
3436 if (*argrest == '\0')
3437 if (++i >= argc)
3438 exim_fail("exim: string expected after -X\n");
3439 break;
3440
3441 case 'z':
3442 if (*argrest == '\0')
3443 if (++i < argc)
3444 log_oneline = argv[i];
3445 else
3446 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3447 break;
3448
3449 /* All other initial characters are errors */
3450
3451 default:
3452 badarg = TRUE;
3453 break;
3454 } /* End of high-level switch statement */
3455
3456 /* Failed to recognize the option, or syntax error */
3457
3458 if (badarg)
3459 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3460 "option %s\n", arg);
3461 }
3462
3463
3464 /* If -R or -S have been specified without -q, assume a single queue run. */
3465
3466 if ( (deliver_selectstring || deliver_selectstring_sender)
3467 && queue_interval < 0)
3468 queue_interval = 0;
3469
3470
3471 END_ARG:
3472 /* If usage_wanted is set we call the usage function - which never returns */
3473 if (usage_wanted) exim_usage(called_as);
3474
3475 /* Arguments have been processed. Check for incompatibilities. */
3476 if ((
3477 (smtp_input || extract_recipients || recipients_arg < argc) &&
3478 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3479 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3480 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3481 ) ||
3482 (
3483 msg_action_arg > 0 &&
3484 (f.daemon_listen || queue_interval > 0 || list_options ||
3485 (checking && msg_action != MSG_LOAD) ||
3486 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3487 ) ||
3488 (
3489 (f.daemon_listen || queue_interval > 0) &&
3490 (sender_address != NULL || list_options || list_queue || checking ||
3491 bi_option)
3492 ) ||
3493 (
3494 f.daemon_listen && queue_interval == 0
3495 ) ||
3496 (
3497 f.inetd_wait_mode && queue_interval >= 0
3498 ) ||
3499 (
3500 list_options &&
3501 (checking || smtp_input || extract_recipients ||
3502 filter_test != FTEST_NONE || bi_option)
3503 ) ||
3504 (
3505 verify_address_mode &&
3506 (f.address_test_mode || smtp_input || extract_recipients ||
3507 filter_test != FTEST_NONE || bi_option)
3508 ) ||
3509 (
3510 f.address_test_mode && (smtp_input || extract_recipients ||
3511 filter_test != FTEST_NONE || bi_option)
3512 ) ||
3513 (
3514 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3515 extract_recipients)
3516 ) ||
3517 (
3518 deliver_selectstring != NULL && queue_interval < 0
3519 ) ||
3520 (
3521 msg_action == MSG_LOAD &&
3522 (!expansion_test || expansion_test_message != NULL)
3523 )
3524 )
3525 exim_fail("exim: incompatible command-line options or arguments\n");
3526
3527 /* If debugging is set up, set the file and the file descriptor to pass on to
3528 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3529 to run in the foreground. */
3530
3531 if (debug_selector != 0)
3532 {
3533 debug_file = stderr;
3534 debug_fd = fileno(debug_file);
3535 f.background_daemon = FALSE;
3536 testharness_pause_ms(100); /* lets caller finish */
3537 if (debug_selector != D_v) /* -v only doesn't show this */
3538 {
3539 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3540 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3541 debug_selector);
3542 if (!version_printed)
3543 show_whats_supported(stderr);
3544 }
3545 }
3546
3547 /* When started with root privilege, ensure that the limits on the number of
3548 open files and the number of processes (where that is accessible) are
3549 sufficiently large, or are unset, in case Exim has been called from an
3550 environment where the limits are screwed down. Not all OS have the ability to
3551 change some of these limits. */
3552
3553 if (unprivileged)
3554 {
3555 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3556 }
3557 else
3558 {
3559 struct rlimit rlp;
3560
3561 #ifdef RLIMIT_NOFILE
3562 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3563 {
3564 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3565 strerror(errno));
3566 rlp.rlim_cur = rlp.rlim_max = 0;
3567 }
3568
3569 /* I originally chose 1000 as a nice big number that was unlikely to
3570 be exceeded. It turns out that some older OS have a fixed upper limit of
3571 256. */
3572
3573 if (rlp.rlim_cur < 1000)
3574 {
3575 rlp.rlim_cur = rlp.rlim_max = 1000;
3576 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3577 {
3578 rlp.rlim_cur = rlp.rlim_max = 256;
3579 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3580 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3581 strerror(errno));
3582 }
3583 }
3584 #endif
3585
3586 #ifdef RLIMIT_NPROC
3587 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3588 {
3589 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3590 strerror(errno));
3591 rlp.rlim_cur = rlp.rlim_max = 0;
3592 }
3593
3594 #ifdef RLIM_INFINITY
3595 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3596 {
3597 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3598 #else
3599 if (rlp.rlim_cur < 1000)
3600 {
3601 rlp.rlim_cur = rlp.rlim_max = 1000;
3602 #endif
3603 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3604 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3605 strerror(errno));
3606 }
3607 #endif
3608 }
3609
3610 /* Exim is normally entered as root (but some special configurations are
3611 possible that don't do this). However, it always spins off sub-processes that
3612 set their uid and gid as required for local delivery. We don't want to pass on
3613 any extra groups that root may belong to, so we want to get rid of them all at
3614 this point.
3615
3616 We need to obey setgroups() at this stage, before possibly giving up root
3617 privilege for a changed configuration file, but later on we might need to
3618 check on the additional groups for the admin user privilege - can't do that
3619 till after reading the config, which might specify the exim gid. Therefore,
3620 save the group list here first. */
3621
3622 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3623 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3624
3625 /* There is a fundamental difference in some BSD systems in the matter of
3626 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3627 known not to be different. On the "different" systems there is a single group
3628 list, and the first entry in it is the current group. On all other versions of
3629 Unix there is a supplementary group list, which is in *addition* to the current
3630 group. Consequently, to get rid of all extraneous groups on a "standard" system
3631 you pass over 0 groups to setgroups(), while on a "different" system you pass
3632 over a single group - the current group, which is always the first group in the
3633 list. Calling setgroups() with zero groups on a "different" system results in
3634 an error return. The following code should cope with both types of system.
3635
3636 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3637 the "setgroups() with zero groups" - and changes the egid.
3638 Thanks to that we had to stash the original_egid above, for use below
3639 in the call to exim_setugid().
3640
3641 However, if this process isn't running as root, setgroups() can't be used
3642 since you have to be root to run it, even if throwing away groups.
3643 Except, sigh, for Hurd - where you can.
3644 Not being root here happens only in some unusual configurations. */
3645
3646 if ( !unprivileged
3647 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3648 && setgroups(0, NULL) != 0
3649 #endif
3650 && setgroups(1, group_list) != 0)
3651 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3652
3653 /* If the configuration file name has been altered by an argument on the
3654 command line (either a new file name or a macro definition) and the caller is
3655 not root, or if this is a filter testing run, remove any setuid privilege the
3656 program has and run as the underlying user.
3657
3658 The exim user is locked out of this, which severely restricts the use of -C
3659 for some purposes.
3660
3661 Otherwise, set the real ids to the effective values (should be root unless run
3662 from inetd, which it can either be root or the exim uid, if one is configured).
3663
3664 There is a private mechanism for bypassing some of this, in order to make it
3665 possible to test lots of configurations automatically, without having either to
3666 recompile each time, or to patch in an actual configuration file name and other
3667 values (such as the path name). If running in the test harness, pretend that
3668 configuration file changes and macro definitions haven't happened. */
3669
3670 if (( /* EITHER */
3671 (!f.trusted_config || /* Config changed, or */
3672 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3673 real_uid != root_uid && /* Not root, and */
3674 !f.running_in_test_harness /* Not fudged */
3675 ) || /* OR */
3676 expansion_test /* expansion testing */
3677 || /* OR */
3678 filter_test != FTEST_NONE) /* Filter testing */
3679 {
3680 setgroups(group_count, group_list);
3681 exim_setugid(real_uid, real_gid, FALSE,
3682 US"-C, -D, -be or -bf forces real uid");
3683 removed_privilege = TRUE;
3684
3685 /* In the normal case when Exim is called like this, stderr is available
3686 and should be used for any logging information because attempts to write
3687 to the log will usually fail. To arrange this, we unset really_exim. However,
3688 if no stderr is available there is no point - we might as well have a go
3689 at the log (if it fails, syslog will be written).
3690
3691 Note that if the invoker is Exim, the logs remain available. Messing with
3692 this causes unlogged successful deliveries. */
3693
3694 if (log_stderr && real_uid != exim_uid)
3695 f.really_exim = FALSE;
3696 }
3697
3698 /* Privilege is to be retained for the moment. It may be dropped later,
3699 depending on the job that this Exim process has been asked to do. For now, set
3700 the real uid to the effective so that subsequent re-execs of Exim are done by a
3701 privileged user. */
3702
3703 else
3704 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3705
3706 /* If testing a filter, open the file(s) now, before wasting time doing other
3707 setups and reading the message. */
3708
3709 if (filter_test & FTEST_SYSTEM)
3710 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3711 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3712 strerror(errno));
3713
3714 if (filter_test & FTEST_USER)
3715 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3716 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3717 strerror(errno));
3718
3719 /* Initialise lookup_list
3720 If debugging, already called above via version reporting.
3721 In either case, we initialise the list of available lookups while running
3722 as root. All dynamically modules are loaded from a directory which is
3723 hard-coded into the binary and is code which, if not a module, would be
3724 part of Exim already. Ability to modify the content of the directory
3725 is equivalent to the ability to modify a setuid binary!
3726
3727 This needs to happen before we read the main configuration. */
3728 init_lookup_list();
3729
3730 #ifdef SUPPORT_I18N
3731 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3732 #endif
3733
3734 /* Read the main runtime configuration data; this gives up if there
3735 is a failure. It leaves the configuration file open so that the subsequent
3736 configuration data for delivery can be read if needed.
3737
3738 NOTE: immediately after opening the configuration file we change the working
3739 directory to "/"! Later we change to $spool_directory. We do it there, because
3740 during readconf_main() some expansion takes place already. */
3741
3742 /* Store the initial cwd before we change directories. Can be NULL if the
3743 dir has already been unlinked. */
3744 initial_cwd = os_getcwd(NULL, 0);
3745
3746 /* checking:
3747 -be[m] expansion test -
3748 -b[fF] filter test new
3749 -bh[c] host test -
3750 -bmalware malware_test_file new
3751 -brt retry test new
3752 -brw rewrite test new
3753 -bt address test -
3754 -bv[s] address verify -
3755 list_options:
3756 -bP <option> (except -bP config, which sets list_config)
3757
3758 If any of these options is set, we suppress warnings about configuration
3759 issues (currently about tls_advertise_hosts and keep_environment not being
3760 defined) */
3761
3762 {
3763 #ifdef MEASURE_TIMING
3764 struct timeval t0, diff;
3765 (void)gettimeofday(&t0, NULL);
3766 #endif
3767
3768 readconf_main(checking || list_options);
3769
3770 #ifdef MEASURE_TIMING
3771 report_time_since(&t0, US"readconf_main (delta)");
3772 #endif
3773 }
3774
3775
3776 /* Now in directory "/" */
3777
3778 if (cleanup_environment() == FALSE)
3779 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3780
3781
3782 /* If an action on specific messages is requested, or if a daemon or queue
3783 runner is being started, we need to know if Exim was called by an admin user.
3784 This is the case if the real user is root or exim, or if the real group is
3785 exim, or if one of the supplementary groups is exim or a group listed in
3786 admin_groups. We don't fail all message actions immediately if not admin_user,
3787 since some actions can be performed by non-admin users. Instead, set admin_user
3788 for later interrogation. */
3789
3790 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3791 f.admin_user = TRUE;
3792 else
3793 for (int i = 0; i < group_count && !f.admin_user; i++)
3794 if (group_list[i] == exim_gid)
3795 f.admin_user = TRUE;
3796 else if (admin_groups)
3797 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3798 if (admin_groups[j] == group_list[i])
3799 f.admin_user = TRUE;
3800
3801 /* Another group of privileged users are the trusted users. These are root,
3802 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3803 are permitted to specify sender_addresses with -f on the command line, and
3804 other message parameters as well. */
3805
3806 if (real_uid == root_uid || real_uid == exim_uid)
3807 f.trusted_caller = TRUE;
3808 else
3809 {
3810 if (trusted_users)
3811 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3812 if (trusted_users[i] == real_uid)
3813 f.trusted_caller = TRUE;
3814
3815 if (trusted_groups)
3816 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3817 if (trusted_groups[i] == real_gid)
3818 f.trusted_caller = TRUE;
3819 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3820 if (trusted_groups[i] == group_list[j])
3821 f.trusted_caller = TRUE;
3822 }
3823
3824 /* At this point, we know if the user is privileged and some command-line
3825 options become possibly impermissible, depending upon the configuration file. */
3826
3827 if (checking && commandline_checks_require_admin && !f.admin_user)
3828 exim_fail("exim: those command-line flags are set to require admin\n");
3829
3830 /* Handle the decoding of logging options. */
3831
3832 decode_bits(log_selector, log_selector_size, log_notall,
3833 log_selector_string, log_options, log_options_count, US"log", 0);
3834
3835 DEBUG(D_any)
3836 {
3837 debug_printf("configuration file is %s\n", config_main_filename);
3838 debug_printf("log selectors =");
3839 for (int i = 0; i < log_selector_size; i++)
3840 debug_printf(" %08x", log_selector[i]);
3841 debug_printf("\n");
3842 }
3843
3844 /* If domain literals are not allowed, check the sender address that was
3845 supplied with -f. Ditto for a stripped trailing dot. */
3846
3847 if (sender_address)
3848 {
3849 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3850 exim_fail("exim: bad -f address \"%s\": domain literals not "
3851 "allowed\n", sender_address);
3852 if (f_end_dot && !strip_trailing_dot)
3853 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3854 "(trailing dot not allowed)\n", sender_address);
3855 }
3856
3857 /* See if an admin user overrode our logging. */
3858
3859 if (cmdline_syslog_name)
3860 if (f.admin_user)
3861 {
3862 syslog_processname = cmdline_syslog_name;
3863 log_file_path = string_copy(CUS"syslog");
3864 }
3865 else
3866 /* not a panic, non-privileged users should not be able to spam paniclog */
3867 exim_fail(
3868 "exim: you lack sufficient privilege to specify syslog process name\n");
3869
3870 /* Paranoia check of maximum lengths of certain strings. There is a check
3871 on the length of the log file path in log.c, which will come into effect
3872 if there are any calls to write the log earlier than this. However, if we
3873 get this far but the string is very long, it is better to stop now than to
3874 carry on and (e.g.) receive a message and then have to collapse. The call to
3875 log_write() from here will cause the ultimate panic collapse if the complete
3876 file name exceeds the buffer length. */
3877
3878 if (Ustrlen(log_file_path) > 200)
3879 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3880 "log_file_path is longer than 200 chars: aborting");
3881
3882 if (Ustrlen(pid_file_path) > 200)
3883 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3884 "pid_file_path is longer than 200 chars: aborting");
3885
3886 if (Ustrlen(spool_directory) > 200)
3887 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3888 "spool_directory is longer than 200 chars: aborting");
3889
3890 /* Length check on the process name given to syslog for its TAG field,
3891 which is only permitted to be 32 characters or less. See RFC 3164. */
3892
3893 if (Ustrlen(syslog_processname) > 32)
3894 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3895 "syslog_processname is longer than 32 chars: aborting");
3896
3897 if (log_oneline)
3898 if (f.admin_user)
3899 {
3900 log_write(0, LOG_MAIN, "%s", log_oneline);
3901 return EXIT_SUCCESS;
3902 }
3903 else
3904 return EXIT_FAILURE;
3905
3906 /* In some operating systems, the environment variable TMPDIR controls where
3907 temporary files are created; Exim doesn't use these (apart from when delivering
3908 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3909 If TMPDIR is found in the environment, reset it to the value defined in the
3910 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3911 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3912 EXIM_TMPDIR by the build scripts.
3913 */
3914
3915 #ifdef EXIM_TMPDIR
3916 if (environ) for (uschar ** p = USS environ; *p; p++)
3917 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3918 {
3919 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3920 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3921 *p = newp;
3922 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3923 }
3924 #endif
3925
3926 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3927 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3928 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3929 called by a user who has set the TZ variable. This then affects the timestamps
3930 in log files and in Received: headers, and any created Date: header lines. The
3931 required timezone is settable in the configuration file, so nothing can be done
3932 about this earlier - but hopefully nothing will normally be logged earlier than
3933 this. We have to make a new environment if TZ is wrong, but don't bother if
3934 timestamps_utc is set, because then all times are in UTC anyway. */
3935
3936 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3937 f.timestamps_utc = TRUE;
3938 else
3939 {
3940 uschar *envtz = US getenv("TZ");
3941 if (envtz
3942 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3943 : timezone_string != NULL
3944 )
3945 {
3946 uschar **p = USS environ;
3947 uschar **new;
3948 uschar **newp;
3949 int count = 0;
3950 if (environ) while (*p++) count++;
3951 if (!envtz) count++;
3952 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3953 if (environ) for (p = USS environ; *p; p++)
3954 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3955 if (timezone_string)
3956 {
3957 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3958 sprintf(CS *newp++, "TZ=%s", timezone_string);
3959 }
3960 *newp = NULL;
3961 environ = CSS new;
3962 tzset();
3963 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3964 tod_stamp(tod_log));
3965 }
3966 }
3967
3968 /* Handle the case when we have removed the setuid privilege because of -C or
3969 -D. This means that the caller of Exim was not root.
3970
3971 There is a problem if we were running as the Exim user. The sysadmin may
3972 expect this case to retain privilege because "the binary was called by the
3973 Exim user", but it hasn't, because either the -D option set macros, or the
3974 -C option set a non-trusted configuration file. There are two possibilities:
3975
3976 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3977 to do message deliveries. Thus, the fact that it is running as a
3978 non-privileged user is plausible, and might be wanted in some special
3979 configurations. However, really_exim will have been set false when
3980 privilege was dropped, to stop Exim trying to write to its normal log
3981 files. Therefore, re-enable normal log processing, assuming the sysadmin
3982 has set up the log directory correctly.
3983
3984 (2) If deliver_drop_privilege is not set, the configuration won't work as
3985 apparently intended, and so we log a panic message. In order to retain
3986 root for -C or -D, the caller must either be root or be invoking a
3987 trusted configuration file (when deliver_drop_privilege is false). */
3988
3989 if ( removed_privilege
3990 && (!f.trusted_config || opt_D_used)
3991 && real_uid == exim_uid)
3992 if (deliver_drop_privilege)
3993 f.really_exim = TRUE; /* let logging work normally */
3994 else
3995 log_write(0, LOG_MAIN|LOG_PANIC,
3996 "exim user lost privilege for using %s option",
3997 f.trusted_config? "-D" : "-C");
3998
3999 /* Start up Perl interpreter if Perl support is configured and there is a
4000 perl_startup option, and the configuration or the command line specifies
4001 initializing starting. Note that the global variables are actually called
4002 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4003
4004 #ifdef EXIM_PERL
4005 if (perl_start_option != 0)
4006 opt_perl_at_start = (perl_start_option > 0);
4007 if (opt_perl_at_start && opt_perl_startup != NULL)
4008 {
4009 uschar *errstr;
4010 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4011 if ((errstr = init_perl(opt_perl_startup)))
4012 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4013 opt_perl_started = TRUE;
4014 }
4015 #endif /* EXIM_PERL */
4016
4017 /* Log the arguments of the call if the configuration file said so. This is
4018 a debugging feature for finding out what arguments certain MUAs actually use.
4019 Don't attempt it if logging is disabled, or if listing variables or if
4020 verifying/testing addresses or expansions. */
4021
4022 if ( (debug_selector & D_any || LOGGING(arguments))
4023 && f.really_exim && !list_options && !checking)
4024 {
4025 uschar *p = big_buffer;
4026 Ustrcpy(p, US"cwd= (failed)");
4027
4028 if (!initial_cwd)
4029 p += 13;
4030 else
4031 {
4032 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4033 p += 4 + Ustrlen(initial_cwd);
4034 /* in case p is near the end and we don't provide enough space for
4035 * string_format to be willing to write. */
4036 *p = '\0';
4037 }
4038
4039 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4040 while (*p) p++;
4041 for (int i = 0; i < argc; i++)
4042 {
4043 int len = Ustrlen(argv[i]);
4044 const uschar *printing;
4045 uschar *quote;
4046 if (p + len + 8 >= big_buffer + big_buffer_size)
4047 {
4048 Ustrcpy(p, US" ...");
4049 log_write(0, LOG_MAIN, "%s", big_buffer);
4050 Ustrcpy(big_buffer, US"...");
4051 p = big_buffer + 3;
4052 }
4053 printing = string_printing(argv[i]);
4054 if (printing[0] == 0) quote = US"\""; else
4055 {
4056 const uschar *pp = printing;
4057 quote = US"";
4058 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4059 }
4060 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4061 (p - big_buffer) - 4), printing, quote);
4062 }
4063
4064 if (LOGGING(arguments))
4065 log_write(0, LOG_MAIN, "%s", big_buffer);
4066 else
4067 debug_printf("%s\n", big_buffer);
4068 }
4069
4070 /* Set the working directory to be the top-level spool directory. We don't rely
4071 on this in the code, which always uses fully qualified names, but it's useful
4072 for core dumps etc. Don't complain if it fails - the spool directory might not
4073 be generally accessible and calls with the -C option (and others) have lost
4074 privilege by now. Before the chdir, we try to ensure that the directory exists.
4075 */
4076
4077 if (Uchdir(spool_directory) != 0)
4078 {
4079 int dummy;
4080 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4081 dummy = /* quieten compiler */ Uchdir(spool_directory);
4082 dummy = dummy; /* yet more compiler quietening, sigh */
4083 }
4084
4085 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4086 alias file. Exim doesn't have such a concept, but this call is screwed into
4087 Sun's YP makefiles. Handle this by calling a configured script, as the real
4088 user who called Exim. The -oA option can be used to pass an argument to the
4089 script. */
4090
4091 if (bi_option)
4092 {
4093 (void)fclose(config_file);
4094 if (bi_command != NULL)
4095 {
4096 int i = 0;</