Fix parsing of cmdline -os & -pr options. Bug 2538
[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, CCSS &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_ARC
976 fprintf(fp, " Experimental_ARC");
977 #endif
978 #ifdef EXPERIMENTAL_BRIGHTMAIL
979 fprintf(fp, " Experimental_Brightmail");
980 #endif
981 #ifdef EXPERIMENTAL_DCC
982 fprintf(fp, " Experimental_DCC");
983 #endif
984 #ifdef EXPERIMENTAL_DSN_INFO
985 fprintf(fp, " Experimental_DSN_info");
986 #endif
987 #ifdef EXPERIMENTAL_LMDB
988 fprintf(fp, " Experimental_LMDB");
989 #endif
990 #ifdef EXPERIMENTAL_QUEUE_RAMP
991 fprintf(fp, " Experimental_Queue_Ramp");
992 #endif
993 #ifdef EXPERIMENTAL_QUEUEFILE
994 fprintf(fp, " Experimental_QUEUEFILE");
995 #endif
996 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
997 fprintf(fp, " Experimental_SRS");
998 #endif
999 #ifdef EXPERIMENTAL_TLS_RESUME
1000 fprintf(fp, " Experimental_TLS_resume");
1001 #endif
1002 fprintf(fp, "\n");
1003
1004 fprintf(fp, "Lookups (built-in):");
1005 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1006 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1007 #endif
1008 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1009 fprintf(fp, " cdb");
1010 #endif
1011 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1012 fprintf(fp, " dbm dbmjz dbmnz");
1013 #endif
1014 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1015 fprintf(fp, " dnsdb");
1016 #endif
1017 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1018 fprintf(fp, " dsearch");
1019 #endif
1020 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1021 fprintf(fp, " ibase");
1022 #endif
1023 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1024 fprintf(fp, " json");
1025 #endif
1026 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1027 fprintf(fp, " ldap ldapdn ldapm");
1028 #endif
1029 #ifdef EXPERIMENTAL_LMDB
1030 fprintf(fp, " lmdb");
1031 #endif
1032 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1033 fprintf(fp, " mysql");
1034 #endif
1035 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1036 fprintf(fp, " nis nis0");
1037 #endif
1038 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1039 fprintf(fp, " nisplus");
1040 #endif
1041 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1042 fprintf(fp, " oracle");
1043 #endif
1044 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1045 fprintf(fp, " passwd");
1046 #endif
1047 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1048 fprintf(fp, " pgsql");
1049 #endif
1050 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1051 fprintf(fp, " redis");
1052 #endif
1053 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1054 fprintf(fp, " sqlite");
1055 #endif
1056 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1057 fprintf(fp, " testdb");
1058 #endif
1059 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1060 fprintf(fp, " whoson");
1061 #endif
1062 fprintf(fp, "\n");
1063
1064 auth_show_supported(fp);
1065 route_show_supported(fp);
1066 transport_show_supported(fp);
1067
1068 #ifdef WITH_CONTENT_SCAN
1069 malware_show_supported(fp);
1070 #endif
1071
1072 if (fixed_never_users[0] > 0)
1073 {
1074 int i;
1075 fprintf(fp, "Fixed never_users: ");
1076 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1077 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1078 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1079 }
1080
1081 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1082
1083 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1084
1085 /* Everything else is details which are only worth reporting when debugging.
1086 Perhaps the tls_version_report should move into this too. */
1087 DEBUG(D_any) do {
1088
1089 /* clang defines __GNUC__ (at least, for me) so test for it first */
1090 #if defined(__clang__)
1091 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1092 #elif defined(__GNUC__)
1093 fprintf(fp, "Compiler: GCC [%s]\n",
1094 # ifdef __VERSION__
1095 __VERSION__
1096 # else
1097 "? unknown version ?"
1098 # endif
1099 );
1100 #else
1101 fprintf(fp, "Compiler: <unknown>\n");
1102 #endif
1103
1104 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1105 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1106 __GLIBC__, __GLIBC_MINOR__);
1107 if (__GLIBC_PREREQ(2, 1))
1108 fprintf(fp, " Runtime: %s\n",
1109 gnu_get_libc_version());
1110 #endif
1111
1112 show_db_version(fp);
1113
1114 #ifndef DISABLE_TLS
1115 tls_version_report(fp);
1116 #endif
1117 #ifdef SUPPORT_I18N
1118 utf8_version_report(fp);
1119 #endif
1120 #ifdef SUPPORT_SPF
1121 spf_lib_version_report(fp);
1122 #endif
1123
1124 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1125 if (authi->version_report)
1126 (*authi->version_report)(fp);
1127
1128 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1129 characters; unless it's an ancient version of PCRE in which case it
1130 is not defined. */
1131 #ifndef PCRE_PRERELEASE
1132 # define PCRE_PRERELEASE
1133 #endif
1134 #define QUOTE(X) #X
1135 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1136 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1137 " Runtime: %s\n",
1138 PCRE_MAJOR, PCRE_MINOR,
1139 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1140 pcre_version());
1141 #undef QUOTE
1142 #undef EXPAND_AND_QUOTE
1143
1144 init_lookup_list();
1145 for (int i = 0; i < lookup_list_count; i++)
1146 if (lookup_list[i]->version_report)
1147 lookup_list[i]->version_report(fp);
1148
1149 #ifdef WHITELIST_D_MACROS
1150 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1151 #else
1152 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1153 #endif
1154 #ifdef TRUSTED_CONFIG_LIST
1155 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1156 #else
1157 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1158 #endif
1159
1160 } while (0);
1161 }
1162
1163
1164 /*************************************************
1165 * Show auxiliary information about Exim *
1166 *************************************************/
1167
1168 static void
1169 show_exim_information(enum commandline_info request, FILE *stream)
1170 {
1171 switch(request)
1172 {
1173 case CMDINFO_NONE:
1174 fprintf(stream, "Oops, something went wrong.\n");
1175 return;
1176 case CMDINFO_HELP:
1177 fprintf(stream,
1178 "The -bI: flag takes a string indicating which information to provide.\n"
1179 "If the string is not recognised, you'll get this help (on stderr).\n"
1180 "\n"
1181 " exim -bI:help this information\n"
1182 " exim -bI:dscp list of known dscp value keywords\n"
1183 " exim -bI:sieve list of supported sieve extensions\n"
1184 );
1185 return;
1186 case CMDINFO_SIEVE:
1187 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1188 fprintf(stream, "%s\n", *pp);
1189 return;
1190 case CMDINFO_DSCP:
1191 dscp_list_to_stream(stream);
1192 return;
1193 }
1194 }
1195
1196
1197 /*************************************************
1198 * Quote a local part *
1199 *************************************************/
1200
1201 /* This function is used when a sender address or a From: or Sender: header
1202 line is being created from the caller's login, or from an authenticated_id. It
1203 applies appropriate quoting rules for a local part.
1204
1205 Argument: the local part
1206 Returns: the local part, quoted if necessary
1207 */
1208
1209 uschar *
1210 local_part_quote(uschar *lpart)
1211 {
1212 BOOL needs_quote = FALSE;
1213 gstring * g;
1214
1215 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1216 {
1217 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1218 (*t != '.' || t == lpart || t[1] == 0);
1219 }
1220
1221 if (!needs_quote) return lpart;
1222
1223 g = string_catn(NULL, US"\"", 1);
1224
1225 for (;;)
1226 {
1227 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1228 if (nq == NULL)
1229 {
1230 g = string_cat(g, lpart);
1231 break;
1232 }
1233 g = string_catn(g, lpart, nq - lpart);
1234 g = string_catn(g, US"\\", 1);
1235 g = string_catn(g, nq, 1);
1236 lpart = nq + 1;
1237 }
1238
1239 g = string_catn(g, US"\"", 1);
1240 return string_from_gstring(g);
1241 }
1242
1243
1244
1245 #ifdef USE_READLINE
1246 /*************************************************
1247 * Load readline() functions *
1248 *************************************************/
1249
1250 /* This function is called from testing executions that read data from stdin,
1251 but only when running as the calling user. Currently, only -be does this. The
1252 function loads the readline() function library and passes back the functions.
1253 On some systems, it needs the curses library, so load that too, but try without
1254 it if loading fails. All this functionality has to be requested at build time.
1255
1256 Arguments:
1257 fn_readline_ptr pointer to where to put the readline pointer
1258 fn_addhist_ptr pointer to where to put the addhistory function
1259
1260 Returns: the dlopen handle or NULL on failure
1261 */
1262
1263 static void *
1264 set_readline(char * (**fn_readline_ptr)(const char *),
1265 void (**fn_addhist_ptr)(const char *))
1266 {
1267 void *dlhandle;
1268 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1269
1270 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1271 if (dlhandle_curses) dlclose(dlhandle_curses);
1272
1273 if (dlhandle)
1274 {
1275 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1276 * char * readline (const char *prompt);
1277 * void add_history (const char *string);
1278 */
1279 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1280 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1281 }
1282 else
1283 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1284
1285 return dlhandle;
1286 }
1287 #endif
1288
1289
1290
1291 /*************************************************
1292 * Get a line from stdin for testing things *
1293 *************************************************/
1294
1295 /* This function is called when running tests that can take a number of lines
1296 of input (for example, -be and -bt). It handles continuations and trailing
1297 spaces. And prompting and a blank line output on eof. If readline() is in use,
1298 the arguments are non-NULL and provide the relevant functions.
1299
1300 Arguments:
1301 fn_readline readline function or NULL
1302 fn_addhist addhist function or NULL
1303
1304 Returns: pointer to dynamic memory, or NULL at end of file
1305 */
1306
1307 static uschar *
1308 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1309 {
1310 gstring * g = NULL;
1311
1312 if (!fn_readline) { printf("> "); fflush(stdout); }
1313
1314 for (int i = 0;; i++)
1315 {
1316 uschar buffer[1024];
1317 uschar *p, *ss;
1318
1319 #ifdef USE_READLINE
1320 char *readline_line = NULL;
1321 if (fn_readline)
1322 {
1323 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1324 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1325 p = US readline_line;
1326 }
1327 else
1328 #endif
1329
1330 /* readline() not in use */
1331
1332 {
1333 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1334 p = buffer;
1335 }
1336
1337 /* Handle the line */
1338
1339 ss = p + (int)Ustrlen(p);
1340 while (ss > p && isspace(ss[-1])) ss--;
1341
1342 if (i > 0)
1343 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1344
1345 g = string_catn(g, p, ss - p);
1346
1347 #ifdef USE_READLINE
1348 if (fn_readline) free(readline_line);
1349 #endif
1350
1351 /* g can only be NULL if ss==p */
1352 if (ss == p || g->s[g->ptr-1] != '\\')
1353 break;
1354
1355 --g->ptr;
1356 (void) string_from_gstring(g);
1357 }
1358
1359 if (!g) printf("\n");
1360 return string_from_gstring(g);
1361 }
1362
1363
1364
1365 /*************************************************
1366 * Output usage information for the program *
1367 *************************************************/
1368
1369 /* This function is called when there are no recipients
1370 or a specific --help argument was added.
1371
1372 Arguments:
1373 progname information on what name we were called by
1374
1375 Returns: DOES NOT RETURN
1376 */
1377
1378 static void
1379 exim_usage(uschar *progname)
1380 {
1381
1382 /* Handle specific program invocation variants */
1383 if (Ustrcmp(progname, US"-mailq") == 0)
1384 exim_fail(
1385 "mailq - list the contents of the mail queue\n\n"
1386 "For a list of options, see the Exim documentation.\n");
1387
1388 /* Generic usage - we output this whatever happens */
1389 exim_fail(
1390 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1391 "not directly from a shell command line. Options and/or arguments control\n"
1392 "what it does when called. For a list of options, see the Exim documentation.\n");
1393 }
1394
1395
1396
1397 /*************************************************
1398 * Validate that the macros given are okay *
1399 *************************************************/
1400
1401 /* Typically, Exim will drop privileges if macros are supplied. In some
1402 cases, we want to not do so.
1403
1404 Arguments: opt_D_used - true if the commandline had a "-D" option
1405 Returns: true if trusted, false otherwise
1406 */
1407
1408 static BOOL
1409 macros_trusted(BOOL opt_D_used)
1410 {
1411 #ifdef WHITELIST_D_MACROS
1412 uschar *whitelisted, *end, *p, **whites;
1413 int white_count, i, n;
1414 size_t len;
1415 BOOL prev_char_item, found;
1416 #endif
1417
1418 if (!opt_D_used)
1419 return TRUE;
1420 #ifndef WHITELIST_D_MACROS
1421 return FALSE;
1422 #else
1423
1424 /* We only trust -D overrides for some invoking users:
1425 root, the exim run-time user, the optional config owner user.
1426 I don't know why config-owner would be needed, but since they can own the
1427 config files anyway, there's no security risk to letting them override -D. */
1428 if ( ! ((real_uid == root_uid)
1429 || (real_uid == exim_uid)
1430 #ifdef CONFIGURE_OWNER
1431 || (real_uid == config_uid)
1432 #endif
1433 ))
1434 {
1435 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1436 return FALSE;
1437 }
1438
1439 /* Get a list of macros which are whitelisted */
1440 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1441 prev_char_item = FALSE;
1442 white_count = 0;
1443 for (p = whitelisted; *p != '\0'; ++p)
1444 {
1445 if (*p == ':' || isspace(*p))
1446 {
1447 *p = '\0';
1448 if (prev_char_item)
1449 ++white_count;
1450 prev_char_item = FALSE;
1451 continue;
1452 }
1453 if (!prev_char_item)
1454 prev_char_item = TRUE;
1455 }
1456 end = p;
1457 if (prev_char_item)
1458 ++white_count;
1459 if (!white_count)
1460 return FALSE;
1461 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1462 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1463 {
1464 if (*p != '\0')
1465 {
1466 whites[i++] = p;
1467 if (i == white_count)
1468 break;
1469 while (*p != '\0' && p < end)
1470 ++p;
1471 }
1472 }
1473 whites[i] = NULL;
1474
1475 /* The list of commandline macros should be very short.
1476 Accept the N*M complexity. */
1477 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1478 {
1479 found = FALSE;
1480 for (uschar ** w = whites; *w; ++w)
1481 if (Ustrcmp(*w, m->name) == 0)
1482 {
1483 found = TRUE;
1484 break;
1485 }
1486 if (!found)
1487 return FALSE;
1488 if (!m->replacement)
1489 continue;
1490 if ((len = m->replen) == 0)
1491 continue;
1492 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1493 0, PCRE_EOPT, NULL, 0);
1494 if (n < 0)
1495 {
1496 if (n != PCRE_ERROR_NOMATCH)
1497 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1498 return FALSE;
1499 }
1500 }
1501 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1502 return TRUE;
1503 #endif
1504 }
1505
1506
1507 /*************************************************
1508 * Expansion testing *
1509 *************************************************/
1510
1511 /* Expand and print one item, doing macro-processing.
1512
1513 Arguments:
1514 item line for expansion
1515 */
1516
1517 static void
1518 expansion_test_line(uschar * line)
1519 {
1520 int len;
1521 BOOL dummy_macexp;
1522
1523 Ustrncpy(big_buffer, line, big_buffer_size);
1524 big_buffer[big_buffer_size-1] = '\0';
1525 len = Ustrlen(big_buffer);
1526
1527 (void) macros_expand(0, &len, &dummy_macexp);
1528
1529 if (isupper(big_buffer[0]))
1530 {
1531 if (macro_read_assignment(big_buffer))
1532 printf("Defined macro '%s'\n", mlast->name);
1533 }
1534 else
1535 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1536 else printf("Failed: %s\n", expand_string_message);
1537 }
1538
1539
1540
1541 /*************************************************
1542 * Entry point and high-level code *
1543 *************************************************/
1544
1545 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1546 the appropriate action. All the necessary functions are present in the one
1547 binary. I originally thought one should split it up, but it turns out that so
1548 much of the apparatus is needed in each chunk that one might as well just have
1549 it all available all the time, which then makes the coding easier as well.
1550
1551 Arguments:
1552 argc count of entries in argv
1553 argv argument strings, with argv[0] being the program name
1554
1555 Returns: EXIT_SUCCESS if terminated successfully
1556 EXIT_FAILURE otherwise, except when a message has been sent
1557 to the sender, and -oee was given
1558 */
1559
1560 int
1561 main(int argc, char **cargv)
1562 {
1563 uschar **argv = USS cargv;
1564 int arg_receive_timeout = -1;
1565 int arg_smtp_receive_timeout = -1;
1566 int arg_error_handling = error_handling;
1567 int filter_sfd = -1;
1568 int filter_ufd = -1;
1569 int group_count;
1570 int i, rv;
1571 int list_queue_option = 0;
1572 int msg_action = 0;
1573 int msg_action_arg = -1;
1574 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1575 int queue_only_reason = 0;
1576 #ifdef EXIM_PERL
1577 int perl_start_option = 0;
1578 #endif
1579 int recipients_arg = argc;
1580 int sender_address_domain = 0;
1581 int test_retry_arg = -1;
1582 int test_rewrite_arg = -1;
1583 gid_t original_egid;
1584 BOOL arg_queue_only = FALSE;
1585 BOOL bi_option = FALSE;
1586 BOOL checking = FALSE;
1587 BOOL count_queue = FALSE;
1588 BOOL expansion_test = FALSE;
1589 BOOL extract_recipients = FALSE;
1590 BOOL flag_G = FALSE;
1591 BOOL flag_n = FALSE;
1592 BOOL forced_delivery = FALSE;
1593 BOOL f_end_dot = FALSE;
1594 BOOL deliver_give_up = FALSE;
1595 BOOL list_queue = FALSE;
1596 BOOL list_options = FALSE;
1597 BOOL list_config = FALSE;
1598 BOOL local_queue_only;
1599 BOOL more = TRUE;
1600 BOOL one_msg_action = FALSE;
1601 BOOL opt_D_used = FALSE;
1602 BOOL queue_only_set = FALSE;
1603 BOOL receiving_message = TRUE;
1604 BOOL sender_ident_set = FALSE;
1605 BOOL session_local_queue_only;
1606 BOOL unprivileged;
1607 BOOL removed_privilege = FALSE;
1608 BOOL usage_wanted = FALSE;
1609 BOOL verify_address_mode = FALSE;
1610 BOOL verify_as_sender = FALSE;
1611 BOOL version_printed = FALSE;
1612 uschar *alias_arg = NULL;
1613 uschar *called_as = US"";
1614 uschar *cmdline_syslog_name = NULL;
1615 uschar *start_queue_run_id = NULL;
1616 uschar *stop_queue_run_id = NULL;
1617 uschar *expansion_test_message = NULL;
1618 uschar *ftest_domain = NULL;
1619 uschar *ftest_localpart = NULL;
1620 uschar *ftest_prefix = NULL;
1621 uschar *ftest_suffix = NULL;
1622 uschar *log_oneline = NULL;
1623 uschar *malware_test_file = NULL;
1624 uschar *real_sender_address;
1625 uschar *originator_home = US"/";
1626 size_t sz;
1627 rmark reset_point;
1628
1629 struct passwd *pw;
1630 struct stat statbuf;
1631 pid_t passed_qr_pid = (pid_t)0;
1632 int passed_qr_pipe = -1;
1633 gid_t group_list[EXIM_GROUPLIST_SIZE];
1634
1635 /* For the -bI: flag */
1636 enum commandline_info info_flag = CMDINFO_NONE;
1637 BOOL info_stdout = FALSE;
1638
1639 /* Possible options for -R and -S */
1640
1641 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1642
1643 /* Need to define this in case we need to change the environment in order
1644 to get rid of a bogus time zone. We have to make it char rather than uschar
1645 because some OS define it in /usr/include/unistd.h. */
1646
1647 extern char **environ;
1648
1649 #ifdef MEASURE_TIMING
1650 (void)gettimeofday(&timestamp_startup, NULL);
1651 #endif
1652
1653 /* If the Exim user and/or group and/or the configuration file owner/group were
1654 defined by ref:name at build time, we must now find the actual uid/gid values.
1655 This is a feature to make the lives of binary distributors easier. */
1656
1657 #ifdef EXIM_USERNAME
1658 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1659 {
1660 if (exim_uid == 0)
1661 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1662
1663 /* If ref:name uses a number as the name, route_finduser() returns
1664 TRUE with exim_uid set and pw coerced to NULL. */
1665 if (pw)
1666 exim_gid = pw->pw_gid;
1667 #ifndef EXIM_GROUPNAME
1668 else
1669 exim_fail(
1670 "exim: ref:name should specify a usercode, not a group.\n"
1671 "exim: can't let you get away with it unless you also specify a group.\n");
1672 #endif
1673 }
1674 else
1675 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1676 #endif
1677
1678 #ifdef EXIM_GROUPNAME
1679 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1680 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1681 #endif
1682
1683 #ifdef CONFIGURE_OWNERNAME
1684 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1685 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1686 CONFIGURE_OWNERNAME);
1687 #endif
1688
1689 /* We default the system_filter_user to be the Exim run-time user, as a
1690 sane non-root value. */
1691 system_filter_uid = exim_uid;
1692
1693 #ifdef CONFIGURE_GROUPNAME
1694 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1695 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1696 CONFIGURE_GROUPNAME);
1697 #endif
1698
1699 /* In the Cygwin environment, some initialization used to need doing.
1700 It was fudged in by means of this macro; now no longer but we'll leave
1701 it in case of others. */
1702
1703 #ifdef OS_INIT
1704 OS_INIT
1705 #endif
1706
1707 /* Check a field which is patched when we are running Exim within its
1708 testing harness; do a fast initial check, and then the whole thing. */
1709
1710 f.running_in_test_harness =
1711 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1712 if (f.running_in_test_harness)
1713 debug_store = TRUE;
1714
1715 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1716 at the start of a program; however, it seems that some environments do not
1717 follow this. A "strange" locale can affect the formatting of timestamps, so we
1718 make quite sure. */
1719
1720 setlocale(LC_ALL, "C");
1721
1722 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1723
1724 #ifdef _POSIX_MONOTONIC_CLOCK
1725 exim_clock_init();
1726 #endif
1727
1728 /* Set up the default handler for timing using alarm(). */
1729
1730 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1731
1732 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1733 because store_malloc writes a log entry on failure. */
1734
1735 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1736 exim_fail("exim: failed to get store for log buffer\n");
1737
1738 /* Initialize the default log options. */
1739
1740 bits_set(log_selector, log_selector_size, log_default);
1741
1742 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1743 NULL when the daemon is run and the file is closed. We have to use this
1744 indirection, because some systems don't allow writing to the variable "stderr".
1745 */
1746
1747 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1748
1749 /* Arrange for the PCRE regex library to use our store functions. Note that
1750 the normal calls are actually macros that add additional arguments for
1751 debugging purposes so we have to assign specially constructed functions here.
1752 The default is to use store in the stacking pool, but this is overridden in the
1753 regex_must_compile() function. */
1754
1755 pcre_malloc = function_store_get;
1756 pcre_free = function_dummy_free;
1757
1758 /* Ensure there is a big buffer for temporary use in several places. It is put
1759 in malloc store so that it can be freed for enlargement if necessary. */
1760
1761 big_buffer = store_malloc(big_buffer_size);
1762
1763 /* Set up the handler for the data request signal, and set the initial
1764 descriptive text. */
1765
1766 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1767 set_process_info("initializing");
1768 os_restarting_signal(SIGUSR1, usr1_handler);
1769
1770 /* If running in a dockerized environment, the TERM signal is only
1771 delegated to the PID 1 if we request it by setting an signal handler */
1772 if (getpid() == 1) signal(SIGTERM, term_handler);
1773
1774 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1775 in the daemon code. For the rest of Exim's uses, we ignore it. */
1776
1777 signal(SIGHUP, SIG_IGN);
1778
1779 /* We don't want to die on pipe errors as the code is written to handle
1780 the write error instead. */
1781
1782 signal(SIGPIPE, SIG_IGN);
1783
1784 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1785 set to SIG_IGN. This causes subprocesses that complete before the parent
1786 process waits for them not to hang around, so when Exim calls wait(), nothing
1787 is there. The wait() code has been made robust against this, but let's ensure
1788 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1789 ending status. We use sigaction rather than plain signal() on those OS where
1790 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1791 problem on AIX with this.) */
1792
1793 #ifdef SA_NOCLDWAIT
1794 {
1795 struct sigaction act;
1796 act.sa_handler = SIG_DFL;
1797 sigemptyset(&(act.sa_mask));
1798 act.sa_flags = 0;
1799 sigaction(SIGCHLD, &act, NULL);
1800 }
1801 #else
1802 signal(SIGCHLD, SIG_DFL);
1803 #endif
1804
1805 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1806 SIGHUP. */
1807
1808 sighup_argv = argv;
1809
1810 /* Set up the version number. Set up the leading 'E' for the external form of
1811 message ids, set the pointer to the internal form, and initialize it to
1812 indicate no message being processed. */
1813
1814 version_init();
1815 message_id_option[0] = '-';
1816 message_id_external = message_id_option + 1;
1817 message_id_external[0] = 'E';
1818 message_id = message_id_external + 1;
1819 message_id[0] = 0;
1820
1821 /* Set the umask to zero so that any files Exim creates using open() are
1822 created with the modes that it specifies. NOTE: Files created with fopen() have
1823 a problem, which was not recognized till rather late (February 2006). With this
1824 umask, such files will be world writeable. (They are all content scanning files
1825 in the spool directory, which isn't world-accessible, so this is not a
1826 disaster, but it's untidy.) I don't want to change this overall setting,
1827 however, because it will interact badly with the open() calls. Instead, there's
1828 now a function called modefopen() that fiddles with the umask while calling
1829 fopen(). */
1830
1831 (void)umask(0);
1832
1833 /* Precompile the regular expression for matching a message id. Keep this in
1834 step with the code that generates ids in the accept.c module. We need to do
1835 this here, because the -M options check their arguments for syntactic validity
1836 using mac_ismsgid, which uses this. */
1837
1838 regex_ismsgid =
1839 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1840
1841 /* Precompile the regular expression that is used for matching an SMTP error
1842 code, possibly extended, at the start of an error message. Note that the
1843 terminating whitespace character is included. */
1844
1845 regex_smtp_code =
1846 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1847 FALSE, TRUE);
1848
1849 #ifdef WHITELIST_D_MACROS
1850 /* Precompile the regular expression used to filter the content of macros
1851 given to -D for permissibility. */
1852
1853 regex_whitelisted_macro =
1854 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1855 #endif
1856
1857 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1858
1859 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1860 this seems to be a generally accepted convention, since one finds symbolic
1861 links called "mailq" in standard OS configurations. */
1862
1863 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1864 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1865 {
1866 list_queue = TRUE;
1867 receiving_message = FALSE;
1868 called_as = US"-mailq";
1869 }
1870
1871 /* If the program is called as "rmail" treat it as equivalent to
1872 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1873 i.e. preventing a single dot on a line from terminating the message, and
1874 returning with zero return code, even in cases of error (provided an error
1875 message has been sent). */
1876
1877 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1878 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1879 {
1880 f.dot_ends = FALSE;
1881 called_as = US"-rmail";
1882 errors_sender_rc = EXIT_SUCCESS;
1883 }
1884
1885 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1886 this is a smail convention. */
1887
1888 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1889 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1890 {
1891 smtp_input = smtp_batched_input = TRUE;
1892 called_as = US"-rsmtp";
1893 }
1894
1895 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1896 this is a smail convention. */
1897
1898 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1899 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1900 {
1901 queue_interval = 0;
1902 receiving_message = FALSE;
1903 called_as = US"-runq";
1904 }
1905
1906 /* If the program is called as "newaliases" treat it as equivalent to
1907 "exim -bi"; this is a sendmail convention. */
1908
1909 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1910 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1911 {
1912 bi_option = TRUE;
1913 receiving_message = FALSE;
1914 called_as = US"-newaliases";
1915 }
1916
1917 /* Save the original effective uid for a couple of uses later. It should
1918 normally be root, but in some esoteric environments it may not be. */
1919
1920 original_euid = geteuid();
1921 original_egid = getegid();
1922
1923 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1924 to be the same as the real ones. This makes a difference only if Exim is setuid
1925 (or setgid) to something other than root, which could be the case in some
1926 special configurations. */
1927
1928 real_uid = getuid();
1929 real_gid = getgid();
1930
1931 if (real_uid == root_uid)
1932 {
1933 if ((rv = setgid(real_gid)))
1934 exim_fail("exim: setgid(%ld) failed: %s\n",
1935 (long int)real_gid, strerror(errno));
1936 if ((rv = setuid(real_uid)))
1937 exim_fail("exim: setuid(%ld) failed: %s\n",
1938 (long int)real_uid, strerror(errno));
1939 }
1940
1941 /* If neither the original real uid nor the original euid was root, Exim is
1942 running in an unprivileged state. */
1943
1944 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1945
1946 /* Scan the program's arguments. Some can be dealt with right away; others are
1947 simply recorded for checking and handling afterwards. Do a high-level switch
1948 on the second character (the one after '-'), to save some effort. */
1949
1950 for (i = 1; i < argc; i++)
1951 {
1952 BOOL badarg = FALSE;
1953 uschar *arg = argv[i];
1954 uschar *argrest;
1955 int switchchar;
1956
1957 /* An argument not starting with '-' is the start of a recipients list;
1958 break out of the options-scanning loop. */
1959
1960 if (arg[0] != '-')
1961 {
1962 recipients_arg = i;
1963 break;
1964 }
1965
1966 /* An option consisting of -- terminates the options */
1967
1968 if (Ustrcmp(arg, "--") == 0)
1969 {
1970 recipients_arg = i + 1;
1971 break;
1972 }
1973
1974 /* Handle flagged options */
1975
1976 switchchar = arg[1];
1977 argrest = arg+2;
1978
1979 /* Make all -ex options synonymous with -oex arguments, since that
1980 is assumed by various callers. Also make -qR options synonymous with -R
1981 options, as that seems to be required as well. Allow for -qqR too, and
1982 the same for -S options. */
1983
1984 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1985 Ustrncmp(arg+1, "qR", 2) == 0 ||
1986 Ustrncmp(arg+1, "qS", 2) == 0)
1987 {
1988 switchchar = arg[2];
1989 argrest++;
1990 }
1991 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1992 {
1993 switchchar = arg[3];
1994 argrest += 2;
1995 f.queue_2stage = TRUE;
1996 }
1997
1998 /* Make -r synonymous with -f, since it is a documented alias */
1999
2000 else if (arg[1] == 'r') switchchar = 'f';
2001
2002 /* Make -ov synonymous with -v */
2003
2004 else if (Ustrcmp(arg, "-ov") == 0)
2005 {
2006 switchchar = 'v';
2007 argrest++;
2008 }
2009
2010 /* deal with --option_aliases */
2011 else if (switchchar == '-')
2012 {
2013 if (Ustrcmp(argrest, "help") == 0)
2014 {
2015 usage_wanted = TRUE;
2016 break;
2017 }
2018 else if (Ustrcmp(argrest, "version") == 0)
2019 {
2020 switchchar = 'b';
2021 argrest = US"V";
2022 }
2023 }
2024
2025 /* High-level switch on active initial letter */
2026
2027 switch(switchchar)
2028 {
2029
2030 /* sendmail uses -Ac and -Am to control which .cf file is used;
2031 we ignore them. */
2032 case 'A':
2033 if (*argrest == '\0') { badarg = TRUE; break; }
2034 else
2035 {
2036 BOOL ignore = FALSE;
2037 switch (*argrest)
2038 {
2039 case 'c':
2040 case 'm':
2041 if (*(argrest + 1) == '\0')
2042 ignore = TRUE;
2043 break;
2044 }
2045 if (!ignore) badarg = TRUE;
2046 }
2047 break;
2048
2049 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2050 so has no need of it. */
2051
2052 case 'B':
2053 if (!*argrest) i++; /* Skip over the type */
2054 break;
2055
2056
2057 case 'b':
2058 {
2059 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2060
2061 switch (*argrest++)
2062 {
2063 /* -bd: Run in daemon mode, awaiting SMTP connections.
2064 -bdf: Ditto, but in the foreground.
2065 */
2066 case 'd':
2067 f.daemon_listen = TRUE;
2068 if (*argrest == 'f') f.background_daemon = FALSE;
2069 else if (*argrest) badarg = TRUE;
2070 break;
2071
2072 /* -be: Run in expansion test mode
2073 -bem: Ditto, but read a message from a file first
2074 */
2075 case 'e':
2076 expansion_test = checking = TRUE;
2077 if (*argrest == 'm')
2078 {
2079 if (++i >= argc) { badarg = TRUE; break; }
2080 expansion_test_message = argv[i];
2081 argrest++;
2082 }
2083 if (*argrest) badarg = TRUE;
2084 break;
2085
2086 /* -bF: Run system filter test */
2087 case 'F':
2088 filter_test |= checking = FTEST_SYSTEM;
2089 if (*argrest) { 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 break;
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 case 'f':
2101 if (!*argrest)
2102 {
2103 filter_test |= checking = FTEST_USER;
2104 if (++i < argc) filter_test_ufile = argv[i];
2105 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2106 }
2107 else
2108 {
2109 if (++i >= argc)
2110 exim_fail("exim: string expected after %s\n", arg);
2111 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2112 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2113 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2114 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2115 else badarg = TRUE;
2116 }
2117 break;
2118
2119 /* -bh: Host checking - an IP address must follow. */
2120 case 'h':
2121 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2122 {
2123 if (++i >= argc) { badarg = TRUE; break; }
2124 sender_host_address = argv[i];
2125 host_checking = checking = f.log_testing_mode = TRUE;
2126 f.host_checking_callout = *argrest == 'c';
2127 message_logs = FALSE;
2128 }
2129 else badarg = TRUE;
2130 break;
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 case 'i':
2137 if (!*++argrest) bi_option = TRUE;
2138 else badarg = TRUE;
2139 break;
2140
2141 /* -bI: provide information, of the type to follow after a colon.
2142 This is an Exim flag. */
2143 case 'I':
2144 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2145 {
2146 uschar *p = argrest+1;
2147 info_flag = CMDINFO_HELP;
2148 if (Ustrlen(p))
2149 if (strcmpic(p, CUS"sieve") == 0)
2150 {
2151 info_flag = CMDINFO_SIEVE;
2152 info_stdout = TRUE;
2153 }
2154 else if (strcmpic(p, CUS"dscp") == 0)
2155 {
2156 info_flag = CMDINFO_DSCP;
2157 info_stdout = TRUE;
2158 }
2159 else if (strcmpic(p, CUS"help") == 0)
2160 info_stdout = TRUE;
2161 }
2162 else badarg = TRUE;
2163 break;
2164
2165 /* -bm: Accept and deliver message - the default option. Reinstate
2166 receiving_message, which got turned off for all -b options.
2167 -bmalware: test the filename given for malware */
2168 case 'm':
2169 if (!*argrest) receiving_message = TRUE;
2170 else if (Ustrcmp(argrest, "alware") == 0)
2171 {
2172 if (++i >= argc) { badarg = TRUE; break; }
2173 checking = TRUE;
2174 malware_test_file = argv[i];
2175 }
2176 else badarg = TRUE;
2177 break;
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 case 'n':
2183 if (Ustrcmp(argrest, "q") == 0)
2184 {
2185 f.allow_unqualified_sender = FALSE;
2186 f.allow_unqualified_recipient = FALSE;
2187 }
2188 else badarg = TRUE;
2189 break;
2190
2191 /* -bpxx: List the contents of the mail queue, in various forms. If
2192 the option is -bpc, just a queue count is needed. Otherwise, if the
2193 first letter after p is r, then order is random. */
2194 case 'p':
2195 if (*argrest == 'c')
2196 {
2197 count_queue = TRUE;
2198 if (*++argrest) 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) {}
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 badarg = TRUE;
2226 break;
2227
2228
2229 /* -bP: List the configuration variables given as the address list.
2230 Force -v, so configuration errors get displayed. */
2231 case 'P':
2232
2233 /* -bP config: we need to setup here, because later,
2234 * when list_options is checked, the config is read already */
2235 if (*argrest)
2236 badarg = TRUE;
2237 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2238 {
2239 list_config = TRUE;
2240 readconf_save_config(version_string);
2241 }
2242 else
2243 {
2244 list_options = TRUE;
2245 debug_selector |= D_v;
2246 debug_file = stderr;
2247 }
2248 break;
2249
2250 /* -brt: Test retry configuration lookup */
2251 case 'r':
2252 if (Ustrcmp(argrest, "t") == 0)
2253 {
2254 checking = TRUE;
2255 test_retry_arg = i + 1;
2256 goto END_ARG;
2257 }
2258
2259 /* -brw: Test rewrite configuration */
2260
2261 else if (Ustrcmp(argrest, "w") == 0)
2262 {
2263 checking = TRUE;
2264 test_rewrite_arg = i + 1;
2265 goto END_ARG;
2266 }
2267 else badarg = TRUE;
2268 break;
2269
2270 /* -bS: Read SMTP commands on standard input, but produce no replies -
2271 all errors are reported by sending messages. */
2272 case 'S':
2273 if (!*argrest)
2274 smtp_input = smtp_batched_input = receiving_message = TRUE;
2275 else badarg = TRUE;
2276 break;
2277
2278 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2279 on standard output. */
2280 case 's':
2281 if (!*argrest) smtp_input = receiving_message = TRUE;
2282 else badarg = TRUE;
2283 break;
2284
2285 /* -bt: address testing mode */
2286 case 't':
2287 if (!*argrest)
2288 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2289 else badarg = TRUE;
2290 break;
2291
2292 /* -bv: verify addresses */
2293 case 'v':
2294 if (!*argrest)
2295 verify_address_mode = checking = f.log_testing_mode = TRUE;
2296
2297 /* -bvs: verify sender addresses */
2298
2299 else if (Ustrcmp(argrest, "s") == 0)
2300 {
2301 verify_address_mode = checking = f.log_testing_mode = TRUE;
2302 verify_as_sender = TRUE;
2303 }
2304 else badarg = TRUE;
2305 break;
2306
2307 /* -bV: Print version string and support details */
2308 case 'V':
2309 if (!*argrest)
2310 {
2311 printf("Exim version %s #%s built %s\n", version_string,
2312 version_cnumber, version_date);
2313 printf("%s\n", CS version_copyright);
2314 version_printed = TRUE;
2315 show_whats_supported(stdout);
2316 f.log_testing_mode = TRUE;
2317 }
2318 else badarg = TRUE;
2319 break;
2320
2321 /* -bw: inetd wait mode, accept a listening socket as stdin */
2322 case 'w':
2323 f.inetd_wait_mode = TRUE;
2324 f.background_daemon = FALSE;
2325 f.daemon_listen = TRUE;
2326 if (*argrest)
2327 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2328 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2329 break;
2330
2331 default:
2332 badarg = TRUE;
2333 break;
2334 }
2335 break;
2336 }
2337
2338
2339 /* -C: change configuration file list; ignore if it isn't really
2340 a change! Enforce a prefix check if required. */
2341
2342 case 'C':
2343 if (*argrest == 0)
2344 {
2345 if(++i < argc) argrest = argv[i]; else
2346 { badarg = TRUE; break; }
2347 }
2348 if (Ustrcmp(config_main_filelist, argrest) != 0)
2349 {
2350 #ifdef ALT_CONFIG_PREFIX
2351 int sep = 0;
2352 int len = Ustrlen(ALT_CONFIG_PREFIX);
2353 const uschar *list = argrest;
2354 uschar *filename;
2355 while((filename = string_nextinlist(&list, &sep, big_buffer,
2356 big_buffer_size)) != NULL)
2357 {
2358 if ((Ustrlen(filename) < len ||
2359 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2360 Ustrstr(filename, "/../") != NULL) &&
2361 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2362 exim_fail("-C Permission denied\n");
2363 }
2364 #endif
2365 if (real_uid != root_uid)
2366 {
2367 #ifdef TRUSTED_CONFIG_LIST
2368
2369 if (real_uid != exim_uid
2370 #ifdef CONFIGURE_OWNER
2371 && real_uid != config_uid
2372 #endif
2373 )
2374 f.trusted_config = FALSE;
2375 else
2376 {
2377 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2378 if (trust_list)
2379 {
2380 struct stat statbuf;
2381
2382 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2383 (statbuf.st_uid != root_uid /* owner not root */
2384 #ifdef CONFIGURE_OWNER
2385 && statbuf.st_uid != config_uid /* owner not the special one */
2386 #endif
2387 ) || /* or */
2388 (statbuf.st_gid != root_gid /* group not root */
2389 #ifdef CONFIGURE_GROUP
2390 && statbuf.st_gid != config_gid /* group not the special one */
2391 #endif
2392 && (statbuf.st_mode & 020) != 0 /* group writeable */
2393 ) || /* or */
2394 (statbuf.st_mode & 2) != 0) /* world writeable */
2395 {
2396 f.trusted_config = FALSE;
2397 fclose(trust_list);
2398 }
2399 else
2400 {
2401 /* Well, the trust list at least is up to scratch... */
2402 rmark reset_point = store_mark();
2403 uschar *trusted_configs[32];
2404 int nr_configs = 0;
2405 int i = 0;
2406
2407 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2408 {
2409 uschar *start = big_buffer, *nl;
2410 while (*start && isspace(*start))
2411 start++;
2412 if (*start != '/')
2413 continue;
2414 nl = Ustrchr(start, '\n');
2415 if (nl)
2416 *nl = 0;
2417 trusted_configs[nr_configs++] = string_copy(start);
2418 if (nr_configs == 32)
2419 break;
2420 }
2421 fclose(trust_list);
2422
2423 if (nr_configs)
2424 {
2425 int sep = 0;
2426 const uschar *list = argrest;
2427 uschar *filename;
2428 while (f.trusted_config && (filename = string_nextinlist(&list,
2429 &sep, big_buffer, big_buffer_size)) != NULL)
2430 {
2431 for (i=0; i < nr_configs; i++)
2432 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2433 break;
2434 if (i == nr_configs)
2435 {
2436 f.trusted_config = FALSE;
2437 break;
2438 }
2439 }
2440 }
2441 else /* No valid prefixes found in trust_list file. */
2442 f.trusted_config = FALSE;
2443 store_reset(reset_point);
2444 }
2445 }
2446 else /* Could not open trust_list file. */
2447 f.trusted_config = FALSE;
2448 }
2449 #else
2450 /* Not root; don't trust config */
2451 f.trusted_config = FALSE;
2452 #endif
2453 }
2454
2455 config_main_filelist = argrest;
2456 f.config_changed = TRUE;
2457 }
2458 break;
2459
2460
2461 /* -D: set up a macro definition */
2462
2463 case 'D':
2464 #ifdef DISABLE_D_OPTION
2465 exim_fail("exim: -D is not available in this Exim binary\n");
2466 #else
2467 {
2468 int ptr = 0;
2469 macro_item *m;
2470 uschar name[24];
2471 uschar *s = argrest;
2472
2473 opt_D_used = TRUE;
2474 while (isspace(*s)) s++;
2475
2476 if (*s < 'A' || *s > 'Z')
2477 exim_fail("exim: macro name set by -D must start with "
2478 "an upper case letter\n");
2479
2480 while (isalnum(*s) || *s == '_')
2481 {
2482 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2483 s++;
2484 }
2485 name[ptr] = 0;
2486 if (ptr == 0) { badarg = TRUE; break; }
2487 while (isspace(*s)) s++;
2488 if (*s != 0)
2489 {
2490 if (*s++ != '=') { badarg = TRUE; break; }
2491 while (isspace(*s)) s++;
2492 }
2493
2494 for (m = macros_user; m; m = m->next)
2495 if (Ustrcmp(m->name, name) == 0)
2496 exim_fail("exim: duplicated -D in command line\n");
2497
2498 m = macro_create(name, s, TRUE);
2499
2500 if (clmacro_count >= MAX_CLMACROS)
2501 exim_fail("exim: too many -D options on command line\n");
2502 clmacros[clmacro_count++] =
2503 string_sprintf("-D%s=%s", m->name, m->replacement);
2504 }
2505 #endif
2506 break;
2507
2508 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2509 The latter is now a no-op, retained for compatibility only. If -dd is used,
2510 debugging subprocesses of the daemon is disabled. */
2511
2512 case 'd':
2513 if (Ustrcmp(argrest, "ropcr") == 0)
2514 {
2515 /* drop_cr = TRUE; */
2516 }
2517
2518 /* Use an intermediate variable so that we don't set debugging while
2519 decoding the debugging bits. */
2520
2521 else
2522 {
2523 unsigned int selector = D_default;
2524 debug_selector = 0;
2525 debug_file = NULL;
2526 if (*argrest == 'd')
2527 {
2528 f.debug_daemon = TRUE;
2529 argrest++;
2530 }
2531 if (*argrest != 0)
2532 decode_bits(&selector, 1, debug_notall, argrest,
2533 debug_options, debug_options_count, US"debug", 0);
2534 debug_selector = selector;
2535 }
2536 break;
2537
2538
2539 /* -E: This is a local error message. This option is not intended for
2540 external use at all, but is not restricted to trusted callers because it
2541 does no harm (just suppresses certain error messages) and if Exim is run
2542 not setuid root it won't always be trusted when it generates error
2543 messages using this option. If there is a message id following -E, point
2544 message_reference at it, for logging. */
2545
2546 case 'E':
2547 f.local_error_message = TRUE;
2548 if (mac_ismsgid(argrest)) message_reference = argrest;
2549 break;
2550
2551
2552 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2553 option, so it looks as if historically the -oex options are also callable
2554 without the leading -o. So we have to accept them. Before the switch,
2555 anything starting -oe has been converted to -e. Exim does not support all
2556 of the sendmail error options. */
2557
2558 case 'e':
2559 if (Ustrcmp(argrest, "e") == 0)
2560 {
2561 arg_error_handling = ERRORS_SENDER;
2562 errors_sender_rc = EXIT_SUCCESS;
2563 }
2564 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2565 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2566 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2567 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2568 else badarg = TRUE;
2569 break;
2570
2571
2572 /* -F: Set sender's full name, used instead of the gecos entry from
2573 the password file. Since users can usually alter their gecos entries,
2574 there's no security involved in using this instead. The data can follow
2575 the -F or be in the next argument. */
2576
2577 case 'F':
2578 if (*argrest == 0)
2579 {
2580 if(++i < argc) argrest = argv[i]; else
2581 { badarg = TRUE; break; }
2582 }
2583 originator_name = argrest;
2584 f.sender_name_forced = TRUE;
2585 break;
2586
2587
2588 /* -f: Set sender's address - this value is only actually used if Exim is
2589 run by a trusted user, or if untrusted_set_sender is set and matches the
2590 address, except that the null address can always be set by any user. The
2591 test for this happens later, when the value given here is ignored when not
2592 permitted. For an untrusted user, the actual sender is still put in Sender:
2593 if it doesn't match the From: header (unless no_local_from_check is set).
2594 The data can follow the -f or be in the next argument. The -r switch is an
2595 obsolete form of -f but since there appear to be programs out there that
2596 use anything that sendmail has ever supported, better accept it - the
2597 synonymizing is done before the switch above.
2598
2599 At this stage, we must allow domain literal addresses, because we don't
2600 know what the setting of allow_domain_literals is yet. Ditto for trailing
2601 dots and strip_trailing_dot. */
2602
2603 case 'f':
2604 {
2605 int dummy_start, dummy_end;
2606 uschar *errmess;
2607 if (*argrest == 0)
2608 {
2609 if (i+1 < argc) argrest = argv[++i]; else
2610 { badarg = TRUE; break; }
2611 }
2612 if (*argrest == 0)
2613 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2614 else
2615 {
2616 uschar *temp = argrest + Ustrlen(argrest) - 1;
2617 while (temp >= argrest && isspace(*temp)) temp--;
2618 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2619 allow_domain_literals = TRUE;
2620 strip_trailing_dot = TRUE;
2621 #ifdef SUPPORT_I18N
2622 allow_utf8_domains = TRUE;
2623 #endif
2624 sender_address = parse_extract_address(argrest, &errmess,
2625 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2626 sender_address = string_copy_taint(sender_address, TRUE);
2627 #ifdef SUPPORT_I18N
2628 message_smtputf8 = string_is_utf8(sender_address);
2629 allow_utf8_domains = FALSE;
2630 #endif
2631 allow_domain_literals = FALSE;
2632 strip_trailing_dot = FALSE;
2633 if (!sender_address)
2634 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2635 }
2636 f.sender_address_forced = TRUE;
2637 }
2638 break;
2639
2640 /* -G: sendmail invocation to specify that it's a gateway submission and
2641 sendmail may complain about problems instead of fixing them.
2642 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2643 not at this time complain about problems. */
2644
2645 case 'G':
2646 flag_G = TRUE;
2647 break;
2648
2649 /* -h: Set the hop count for an incoming message. Exim does not currently
2650 support this; it always computes it by counting the Received: headers.
2651 To put it in will require a change to the spool header file format. */
2652
2653 case 'h':
2654 if (*argrest == 0)
2655 {
2656 if(++i < argc) argrest = argv[i]; else
2657 { badarg = TRUE; break; }
2658 }
2659 if (!isdigit(*argrest)) badarg = TRUE;
2660 break;
2661
2662
2663 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2664 not to be documented for sendmail but mailx (at least) uses it) */
2665
2666 case 'i':
2667 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2668 break;
2669
2670
2671 /* -L: set the identifier used for syslog; equivalent to setting
2672 syslog_processname in the config file, but needs to be an admin option. */
2673
2674 case 'L':
2675 if (*argrest == '\0')
2676 {
2677 if(++i < argc) argrest = argv[i]; else
2678 { badarg = TRUE; break; }
2679 }
2680 if ((sz = Ustrlen(argrest)) > 32)
2681 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2682 if (sz < 1)
2683 exim_fail("exim: the -L syslog name is too short\n");
2684 cmdline_syslog_name = argrest;
2685 break;
2686
2687 case 'M':
2688 receiving_message = FALSE;
2689
2690 /* -MC: continue delivery of another message via an existing open
2691 file descriptor. This option is used for an internal call by the
2692 smtp transport when there is a pending message waiting to go to an
2693 address to which it has got a connection. Five subsequent arguments are
2694 required: transport name, host name, IP address, sequence number, and
2695 message_id. Transports may decline to create new processes if the sequence
2696 number gets too big. The channel is stdin. This (-MC) must be the last
2697 argument. There's a subsequent check that the real-uid is privileged.
2698
2699 If we are running in the test harness. delay for a bit, to let the process
2700 that set this one up complete. This makes for repeatability of the logging,
2701 etc. output. */
2702
2703 if (Ustrcmp(argrest, "C") == 0)
2704 {
2705 union sockaddr_46 interface_sock;
2706 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2707
2708 if (argc != i + 6)
2709 exim_fail("exim: too many or too few arguments after -MC\n");
2710
2711 if (msg_action_arg >= 0)
2712 exim_fail("exim: incompatible arguments\n");
2713
2714 continue_transport = argv[++i];
2715 continue_hostname = argv[++i];
2716 continue_host_address = argv[++i];
2717 continue_sequence = Uatoi(argv[++i]);
2718 msg_action = MSG_DELIVER;
2719 msg_action_arg = ++i;
2720 forced_delivery = TRUE;
2721 queue_run_pid = passed_qr_pid;
2722 queue_run_pipe = passed_qr_pipe;
2723
2724 if (!mac_ismsgid(argv[i]))
2725 exim_fail("exim: malformed message id %s after -MC option\n",
2726 argv[i]);
2727
2728 /* Set up $sending_ip_address and $sending_port, unless proxied */
2729
2730 if (!continue_proxy_cipher)
2731 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2732 &size) == 0)
2733 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2734 &sending_port);
2735 else
2736 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2737 strerror(errno));
2738
2739 testharness_pause_ms(500);
2740 break;
2741 }
2742
2743 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2744 {
2745 switch(argrest[1])
2746 {
2747 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2748 precedes -MC (see above). The flag indicates that the host to which
2749 Exim is connected has accepted an AUTH sequence. */
2750
2751 case 'A': f.smtp_authenticated = TRUE; break;
2752
2753 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2754 that exim is connected to supports the esmtp extension DSN */
2755
2756 case 'D': smtp_peer_options |= OPTION_DSN; break;
2757
2758 /* -MCG: set the queue name, to a non-default value */
2759
2760 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2761 else badarg = TRUE;
2762 break;
2763
2764 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2765
2766 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2767
2768 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2769 it preceded -MC (see above) */
2770
2771 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2772
2773 /* -MCQ: pass on the pid of the queue-running process that started
2774 this chain of deliveries and the fd of its synchronizing pipe; this
2775 is useful only when it precedes -MC (see above) */
2776
2777 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2778 else badarg = TRUE;
2779 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2780 else badarg = TRUE;
2781 break;
2782
2783 /* -MCS: set the smtp_use_size flag; this is useful only when it
2784 precedes -MC (see above) */
2785
2786 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2787
2788 #ifndef DISABLE_TLS
2789 /* -MCt: similar to -MCT below but the connection is still open
2790 via a proxy process which handles the TLS context and coding.
2791 Require three arguments for the proxied local address and port,
2792 and the TLS cipher. */
2793
2794 case 't': if (++i < argc) sending_ip_address = argv[i];
2795 else badarg = TRUE;
2796 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2797 else badarg = TRUE;
2798 if (++i < argc) continue_proxy_cipher = argv[i];
2799 else badarg = TRUE;
2800 /*FALLTHROUGH*/
2801
2802 /* -MCT: set the tls_offered flag; this is useful only when it
2803 precedes -MC (see above). The flag indicates that the host to which
2804 Exim is connected has offered TLS support. */
2805
2806 case 'T': smtp_peer_options |= OPTION_TLS; break;
2807 #endif
2808
2809 default: badarg = TRUE; break;
2810 }
2811 break;
2812 }
2813
2814 /* -M[x]: various operations on the following list of message ids:
2815 -M deliver the messages, ignoring next retry times and thawing
2816 -Mc deliver the messages, checking next retry times, no thawing
2817 -Mf freeze the messages
2818 -Mg give up on the messages
2819 -Mt thaw the messages
2820 -Mrm remove the messages
2821 In the above cases, this must be the last option. There are also the
2822 following options which are followed by a single message id, and which
2823 act on that message. Some of them use the "recipient" addresses as well.
2824 -Mar add recipient(s)
2825 -Mmad mark all recipients delivered
2826 -Mmd mark recipients(s) delivered
2827 -Mes edit sender
2828 -Mset load a message for use with -be
2829 -Mvb show body
2830 -Mvc show copy (of whole message, in RFC 2822 format)
2831 -Mvh show header
2832 -Mvl show log
2833 */
2834
2835 else if (*argrest == 0)
2836 {
2837 msg_action = MSG_DELIVER;
2838 forced_delivery = f.deliver_force_thaw = TRUE;
2839 }
2840 else if (Ustrcmp(argrest, "ar") == 0)
2841 {
2842 msg_action = MSG_ADD_RECIPIENT;
2843 one_msg_action = TRUE;
2844 }
2845 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2846 else if (Ustrcmp(argrest, "es") == 0)
2847 {
2848 msg_action = MSG_EDIT_SENDER;
2849 one_msg_action = TRUE;
2850 }
2851 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2852 else if (Ustrcmp(argrest, "g") == 0)
2853 {
2854 msg_action = MSG_DELIVER;
2855 deliver_give_up = TRUE;
2856 }
2857 else if (Ustrcmp(argrest, "G") == 0)
2858 {
2859 msg_action = MSG_SETQUEUE;
2860 queue_name_dest = argv[++i];
2861 }
2862 else if (Ustrcmp(argrest, "mad") == 0)
2863 {
2864 msg_action = MSG_MARK_ALL_DELIVERED;
2865 }
2866 else if (Ustrcmp(argrest, "md") == 0)
2867 {
2868 msg_action = MSG_MARK_DELIVERED;
2869 one_msg_action = TRUE;
2870 }
2871 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2872 else if (Ustrcmp(argrest, "set") == 0)
2873 {
2874 msg_action = MSG_LOAD;
2875 one_msg_action = TRUE;
2876 }
2877 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2878 else if (Ustrcmp(argrest, "vb") == 0)
2879 {
2880 msg_action = MSG_SHOW_BODY;
2881 one_msg_action = TRUE;
2882 }
2883 else if (Ustrcmp(argrest, "vc") == 0)
2884 {
2885 msg_action = MSG_SHOW_COPY;
2886 one_msg_action = TRUE;
2887 }
2888 else if (Ustrcmp(argrest, "vh") == 0)
2889 {
2890 msg_action = MSG_SHOW_HEADER;
2891 one_msg_action = TRUE;
2892 }
2893 else if (Ustrcmp(argrest, "vl") == 0)
2894 {
2895 msg_action = MSG_SHOW_LOG;
2896 one_msg_action = TRUE;
2897 }
2898 else { badarg = TRUE; break; }
2899
2900 /* All the -Mxx options require at least one message id. */
2901
2902 msg_action_arg = i + 1;
2903 if (msg_action_arg >= argc)
2904 exim_fail("exim: no message ids given after %s option\n", arg);
2905
2906 /* Some require only message ids to follow */
2907
2908 if (!one_msg_action)
2909 {
2910 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2911 exim_fail("exim: malformed message id %s after %s option\n",
2912 argv[j], arg);
2913 goto END_ARG; /* Remaining args are ids */
2914 }
2915
2916 /* Others require only one message id, possibly followed by addresses,
2917 which will be handled as normal arguments. */
2918
2919 else
2920 {
2921 if (!mac_ismsgid(argv[msg_action_arg]))
2922 exim_fail("exim: malformed message id %s after %s option\n",
2923 argv[msg_action_arg], arg);
2924 i++;
2925 }
2926 break;
2927
2928
2929 /* Some programs seem to call the -om option without the leading o;
2930 for sendmail it askes for "me too". Exim always does this. */
2931
2932 case 'm':
2933 if (*argrest != 0) badarg = TRUE;
2934 break;
2935
2936
2937 /* -N: don't do delivery - a debugging option that stops transports doing
2938 their thing. It implies debugging at the D_v level. */
2939
2940 case 'N':
2941 if (*argrest == 0)
2942 {
2943 f.dont_deliver = TRUE;
2944 debug_selector |= D_v;
2945 debug_file = stderr;
2946 }
2947 else badarg = TRUE;
2948 break;
2949
2950
2951 /* -n: This means "don't alias" in sendmail, apparently.
2952 For normal invocations, it has no effect.
2953 It may affect some other options. */
2954
2955 case 'n':
2956 flag_n = TRUE;
2957 break;
2958
2959 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2960 option to the specified value. This form uses long names. We need to handle
2961 -O option=value and -Ooption=value. */
2962
2963 case 'O':
2964 if (*argrest == 0)
2965 if (++i >= argc)
2966 exim_fail("exim: string expected after -O\n");
2967 break;
2968
2969 case 'o':
2970 switch (*argrest++)
2971 {
2972 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2973 file" option). */
2974 case 'A':
2975 if (!*(alias_arg = argrest))
2976 if (i+1 < argc) alias_arg = argv[++i];
2977 else exim_fail("exim: string expected after -oA\n");
2978 break;
2979
2980 /* -oB: Set a connection message max value for remote deliveries */
2981 case 'B':
2982 {
2983 uschar * p = argrest;
2984 if (!*p)
2985 if (i+1 < argc && isdigit((argv[i+1][0])))
2986 p = argv[++i];
2987 else
2988 {
2989 connection_max_messages = 1;
2990 p = NULL;
2991 }
2992
2993 if (p)
2994 {
2995 if (!isdigit(*p))
2996 exim_fail("exim: number expected after -oB\n");
2997 connection_max_messages = Uatoi(p);
2998 }
2999 }
3000 break;
3001
3002 /* -odb: background delivery */
3003
3004 case 'd':
3005 if (Ustrcmp(argrest, "b") == 0)
3006 {
3007 f.synchronous_delivery = FALSE;
3008 arg_queue_only = FALSE;
3009 queue_only_set = TRUE;
3010 }
3011
3012 /* -odd: testsuite-only: add no inter-process delays */
3013
3014 else if (Ustrcmp(argrest, "d") == 0)
3015 f.testsuite_delays = FALSE;
3016
3017 /* -odf: foreground delivery (smail-compatible option); same effect as
3018 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3019 */
3020
3021 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3022 {
3023 f.synchronous_delivery = TRUE;
3024 arg_queue_only = FALSE;
3025 queue_only_set = TRUE;
3026 }
3027
3028 /* -odq: queue only */
3029
3030 else if (Ustrcmp(argrest, "q") == 0)
3031 {
3032 f.synchronous_delivery = FALSE;
3033 arg_queue_only = TRUE;
3034 queue_only_set = TRUE;
3035 }
3036
3037 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3038 but no remote delivery */
3039
3040 else if (Ustrcmp(argrest, "qs") == 0)
3041 {
3042 f.queue_smtp = TRUE;
3043 arg_queue_only = FALSE;
3044 queue_only_set = TRUE;
3045 }
3046 else badarg = TRUE;
3047 break;
3048
3049 /* -oex: Sendmail error flags. As these are also accepted without the
3050 leading -o prefix, for compatibility with vacation and other callers,
3051 they are handled with -e above. */
3052
3053 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3054 -oitrue: Another sendmail syntax for the same */
3055
3056 case 'i':
3057 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3058 f.dot_ends = FALSE;
3059 else badarg = TRUE;
3060 break;
3061
3062 /* -oM*: Set various characteristics for an incoming message; actually
3063 acted on for trusted callers only. */
3064
3065 case 'M':
3066 {
3067 if (i+1 >= argc)
3068 exim_fail("exim: data expected after -oM%s\n", argrest);
3069
3070 /* -oMa: Set sender host address */
3071
3072 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3073
3074 /* -oMaa: Set authenticator name */
3075
3076 else if (Ustrcmp(argrest, "aa") == 0)
3077 sender_host_authenticated = argv[++i];
3078
3079 /* -oMas: setting authenticated sender */
3080
3081 else if (Ustrcmp(argrest, "as") == 0)
3082 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3083
3084 /* -oMai: setting authenticated id */
3085
3086 else if (Ustrcmp(argrest, "ai") == 0)
3087 authenticated_id = string_copy_taint(argv[++i], TRUE);
3088
3089 /* -oMi: Set incoming interface address */
3090
3091 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3092
3093 /* -oMm: Message reference */
3094
3095 else if (Ustrcmp(argrest, "m") == 0)
3096 {
3097 if (!mac_ismsgid(argv[i+1]))
3098 exim_fail("-oMm must be a valid message ID\n");
3099 if (!f.trusted_config)
3100 exim_fail("-oMm must be called by a trusted user/config\n");
3101 message_reference = argv[++i];
3102 }
3103
3104 /* -oMr: Received protocol */
3105
3106 else if (Ustrcmp(argrest, "r") == 0)
3107
3108 if (received_protocol)
3109 exim_fail("received_protocol is set already\n");
3110 else
3111 received_protocol = argv[++i];
3112
3113 /* -oMs: Set sender host name */
3114
3115 else if (Ustrcmp(argrest, "s") == 0)
3116 sender_host_name = string_copy_taint(argv[++i], TRUE);
3117
3118 /* -oMt: Set sender ident */
3119
3120 else if (Ustrcmp(argrest, "t") == 0)
3121 {
3122 sender_ident_set = TRUE;
3123 sender_ident = argv[++i];
3124 }
3125
3126 /* Else a bad argument */
3127
3128 else
3129 badarg = TRUE;
3130 }
3131 break;
3132
3133 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3134 seem to call this as -m (undocumented), so that is also accepted (see
3135 above). */
3136 /* -oo: An ancient flag for old-style addresses which still seems to
3137 crop up in some calls (see in SCO). */
3138
3139 case 'm':
3140 case 'o':
3141 if (*argrest) badarg = TRUE;
3142 break;
3143
3144 /* -oP <name>: set pid file path for daemon
3145 -oPX: delete pid file of daemon */
3146
3147 case 'P':
3148 if (!*argrest) override_pid_file_path = argv[++i];
3149 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3150 else badarg = TRUE;
3151 break;
3152
3153
3154 /* -or <n>: set timeout for non-SMTP acceptance
3155 -os <n>: set timeout for SMTP acceptance */
3156
3157 case 'r':
3158 case 's':
3159 {
3160 int * tp = argrest[-1] == 'r'
3161 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3162 if (*argrest)
3163 *tp = readconf_readtime(argrest, 0, FALSE);
3164 else if (i+1 < argc)
3165 *tp = readconf_readtime(argv[++i], 0, FALSE);
3166
3167 if (*tp < 0)
3168 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3169 }
3170 break;
3171
3172 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3173
3174 case 'X':
3175 if (*argrest) badarg = TRUE;
3176 else override_local_interfaces = argv[++i];
3177 break;
3178
3179 /* Unknown -o argument */
3180
3181 default:
3182 badarg = TRUE;
3183 }
3184 break;
3185
3186
3187 /* -ps: force Perl startup; -pd force delayed Perl startup */
3188
3189 case 'p':
3190 #ifdef EXIM_PERL
3191 if (*argrest == 's' && argrest[1] == 0)
3192 {
3193 perl_start_option = 1;
3194 break;
3195 }
3196 if (*argrest == 'd' && argrest[1] == 0)
3197 {
3198 perl_start_option = -1;
3199 break;
3200 }
3201 #endif
3202
3203 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3204 which sets the host protocol and host name */
3205
3206 if (*argrest == 0)
3207 if (i+1 < argc)
3208 argrest = argv[++i];
3209 else
3210 { badarg = TRUE; break; }
3211
3212 if (*argrest != 0)
3213 {
3214 uschar *hn;
3215
3216 if (received_protocol)
3217 exim_fail("received_protocol is set already\n");
3218
3219 hn = Ustrchr(argrest, ':');
3220 if (hn == NULL)
3221 received_protocol = argrest;
3222 else
3223 {
3224 int old_pool = store_pool;
3225 store_pool = POOL_PERM;
3226 received_protocol = string_copyn(argrest, hn - argrest);
3227 store_pool = old_pool;
3228 sender_host_name = hn + 1;
3229 }
3230 }
3231 break;
3232
3233
3234 case 'q':
3235 receiving_message = FALSE;
3236 if (queue_interval >= 0)
3237 exim_fail("exim: -q specified more than once\n");
3238
3239 /* -qq...: Do queue runs in a 2-stage manner */
3240
3241 if (*argrest == 'q')
3242 {
3243 f.queue_2stage = TRUE;
3244 argrest++;
3245 }
3246
3247 /* -qi...: Do only first (initial) deliveries */
3248
3249 if (*argrest == 'i')
3250 {
3251 f.queue_run_first_delivery = TRUE;
3252 argrest++;
3253 }
3254
3255 /* -qf...: Run the queue, forcing deliveries
3256 -qff..: Ditto, forcing thawing as well */
3257
3258 if (*argrest == 'f')
3259 {
3260 f.queue_run_force = TRUE;
3261 if (*++argrest == 'f')
3262 {
3263 f.deliver_force_thaw = TRUE;
3264 argrest++;
3265 }
3266 }
3267
3268 /* -q[f][f]l...: Run the queue only on local deliveries */
3269
3270 if (*argrest == 'l')
3271 {
3272 f.queue_run_local = TRUE;
3273 argrest++;
3274 }
3275
3276 /* -q[f][f][l][G<name>]... Work on the named queue */
3277
3278 if (*argrest == 'G')
3279 {
3280 int i;
3281 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3282 queue_name = string_copyn(argrest, i);
3283 argrest += i;
3284 if (*argrest == '/') argrest++;
3285 }
3286
3287 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3288 only, optionally named, optionally starting from a given message id. */
3289
3290 if (!(list_queue || count_queue))
3291 if (*argrest == 0
3292 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3293 {
3294 queue_interval = 0;
3295 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3296 start_queue_run_id = argv[++i];
3297 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3298 stop_queue_run_id = argv[++i];
3299 }
3300
3301 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3302 forced, optionally local only, optionally named. */
3303
3304 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3305 0, FALSE)) <= 0)
3306 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3307 break;
3308
3309
3310 case 'R': /* Synonymous with -qR... */
3311 receiving_message = FALSE;
3312
3313 /* -Rf: As -R (below) but force all deliveries,
3314 -Rff: Ditto, but also thaw all frozen messages,
3315 -Rr: String is regex
3316 -Rrf: Regex and force
3317 -Rrff: Regex and force and thaw
3318
3319 in all cases provided there are no further characters in this
3320 argument. */
3321
3322 if (*argrest != 0)
3323 for (int i = 0; i < nelem(rsopts); i++)
3324 if (Ustrcmp(argrest, rsopts[i]) == 0)
3325 {
3326 if (i != 2) f.queue_run_force = TRUE;
3327 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3328 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3329 argrest += Ustrlen(rsopts[i]);
3330 }
3331
3332 /* -R: Set string to match in addresses for forced queue run to
3333 pick out particular messages. */
3334
3335 if (*argrest)
3336 deliver_selectstring = argrest;
3337 else if (i+1 < argc)
3338 deliver_selectstring = argv[++i];
3339 else
3340 exim_fail("exim: string expected after -R\n");
3341 break;
3342
3343
3344 /* -r: an obsolete synonym for -f (see above) */
3345
3346
3347 /* -S: Like -R but works on sender. */
3348
3349 case 'S': /* Synonymous with -qS... */
3350 receiving_message = FALSE;
3351
3352 /* -Sf: As -S (below) but force all deliveries,
3353 -Sff: Ditto, but also thaw all frozen messages,
3354 -Sr: String is regex
3355 -Srf: Regex and force
3356 -Srff: Regex and force and thaw
3357
3358 in all cases provided there are no further characters in this
3359 argument. */
3360
3361 if (*argrest)
3362 for (int i = 0; i < nelem(rsopts); i++)
3363 if (Ustrcmp(argrest, rsopts[i]) == 0)
3364 {
3365 if (i != 2) f.queue_run_force = TRUE;
3366 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3367 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3368 argrest += Ustrlen(rsopts[i]);
3369 }
3370
3371 /* -S: Set string to match in addresses for forced queue run to
3372 pick out particular messages. */
3373
3374 if (*argrest)
3375 deliver_selectstring_sender = argrest;
3376 else if (i+1 < argc)
3377 deliver_selectstring_sender = argv[++i];
3378 else
3379 exim_fail("exim: string expected after -S\n");
3380 break;
3381
3382 /* -Tqt is an option that is exclusively for use by the testing suite.
3383 It is not recognized in other circumstances. It allows for the setting up
3384 of explicit "queue times" so that various warning/retry things can be
3385 tested. Otherwise variability of clock ticks etc. cause problems. */
3386
3387 case 'T':
3388 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3389 fudged_queue_times = argv[++i];
3390 else badarg = TRUE;
3391 break;
3392
3393
3394 /* -t: Set flag to extract recipients from body of message. */
3395
3396 case 't':
3397 if (*argrest == 0) extract_recipients = TRUE;
3398
3399 /* -ti: Set flag to extract recipients from body of message, and also
3400 specify that dot does not end the message. */
3401
3402 else if (Ustrcmp(argrest, "i") == 0)
3403 {
3404 extract_recipients = TRUE;
3405 f.dot_ends = FALSE;
3406 }
3407
3408 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3409
3410 #ifndef DISABLE_TLS
3411 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3412 #endif
3413
3414 else badarg = TRUE;
3415 break;
3416
3417
3418 /* -U: This means "initial user submission" in sendmail, apparently. The
3419 doc claims that in future sendmail may refuse syntactically invalid
3420 messages instead of fixing them. For the moment, we just ignore it. */
3421
3422 case 'U':
3423 break;
3424
3425
3426 /* -v: verify things - this is a very low-level debugging */
3427
3428 case 'v':
3429 if (*argrest == 0)
3430 {
3431 debug_selector |= D_v;
3432 debug_file = stderr;
3433 }
3434 else badarg = TRUE;
3435 break;
3436
3437
3438 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3439
3440 The -x flag tells the sendmail command that mail from a local
3441 mail program has National Language Support (NLS) extended characters
3442 in the body of the mail item. The sendmail command can send mail with
3443 extended NLS characters across networks that normally corrupts these
3444 8-bit characters.
3445
3446 As Exim is 8-bit clean, it just ignores this flag. */
3447
3448 case 'x':
3449 if (*argrest != 0) badarg = TRUE;
3450 break;
3451
3452 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3453 logs to that file. We swallow the parameter and otherwise ignore it. */
3454
3455 case 'X':
3456 if (*argrest == '\0')
3457 if (++i >= argc)
3458 exim_fail("exim: string expected after -X\n");
3459 break;
3460
3461 case 'z':
3462 if (*argrest == '\0')
3463 if (++i < argc)
3464 log_oneline = argv[i];
3465 else
3466 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3467 break;
3468
3469 /* All other initial characters are errors */
3470
3471 default:
3472 badarg = TRUE;
3473 break;
3474 } /* End of high-level switch statement */
3475
3476 /* Failed to recognize the option, or syntax error */
3477
3478 if (badarg)
3479 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3480 "option %s\n", arg);
3481 }
3482
3483
3484 /* If -R or -S have been specified without -q, assume a single queue run. */
3485
3486 if ( (deliver_selectstring || deliver_selectstring_sender)
3487 && queue_interval < 0)
3488 queue_interval = 0;
3489
3490
3491 END_ARG:
3492 /* If usage_wanted is set we call the usage function - which never returns */
3493 if (usage_wanted) exim_usage(called_as);
3494
3495 /* Arguments have been processed. Check for incompatibilities. */
3496 if ((
3497 (smtp_input || extract_recipients || recipients_arg < argc) &&
3498 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3499 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3500 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3501 ) ||
3502 (
3503 msg_action_arg > 0 &&
3504 (f.daemon_listen || queue_interval > 0 || list_options ||
3505 (checking && msg_action != MSG_LOAD) ||
3506 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3507 ) ||
3508 (
3509 (f.daemon_listen || queue_interval > 0) &&
3510 (sender_address != NULL || list_options || list_queue || checking ||
3511 bi_option)
3512 ) ||
3513 (
3514 f.daemon_listen && queue_interval == 0
3515 ) ||
3516 (
3517 f.inetd_wait_mode && queue_interval >= 0
3518 ) ||
3519 (
3520 list_options &&
3521 (checking || smtp_input || extract_recipients ||
3522 filter_test != FTEST_NONE || bi_option)
3523 ) ||
3524 (
3525 verify_address_mode &&
3526 (f.address_test_mode || smtp_input || extract_recipients ||
3527 filter_test != FTEST_NONE || bi_option)
3528 ) ||
3529 (
3530 f.address_test_mode && (smtp_input || extract_recipients ||
3531 filter_test != FTEST_NONE || bi_option)
3532 ) ||
3533 (
3534 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3535 extract_recipients)
3536 ) ||
3537 (
3538 deliver_selectstring != NULL && queue_interval < 0
3539 ) ||
3540 (
3541 msg_action == MSG_LOAD &&
3542 (!expansion_test || expansion_test_message != NULL)
3543 )
3544 )
3545 exim_fail("exim: incompatible command-line options or arguments\n");
3546
3547 /* If debugging is set up, set the file and the file descriptor to pass on to
3548 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3549 to run in the foreground. */
3550
3551 if (debug_selector != 0)
3552 {
3553 debug_file = stderr;
3554 debug_fd = fileno(debug_file);
3555 f.background_daemon = FALSE;
3556 testharness_pause_ms(100); /* lets caller finish */
3557 if (debug_selector != D_v) /* -v only doesn't show this */
3558 {
3559 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3560 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3561 debug_selector);
3562 if (!version_printed)
3563 show_whats_supported(stderr);
3564 }
3565 }
3566
3567 /* When started with root privilege, ensure that the limits on the number of
3568 open files and the number of processes (where that is accessible) are
3569 sufficiently large, or are unset, in case Exim has been called from an
3570 environment where the limits are screwed down. Not all OS have the ability to
3571 change some of these limits. */
3572
3573 if (unprivileged)
3574 {
3575 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3576 }
3577 else
3578 {
3579 struct rlimit rlp;
3580
3581 #ifdef RLIMIT_NOFILE
3582 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3583 {
3584 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3585 strerror(errno));
3586 rlp.rlim_cur = rlp.rlim_max = 0;
3587 }
3588
3589 /* I originally chose 1000 as a nice big number that was unlikely to
3590 be exceeded. It turns out that some older OS have a fixed upper limit of
3591 256. */
3592
3593 if (rlp.rlim_cur < 1000)
3594 {
3595 rlp.rlim_cur = rlp.rlim_max = 1000;
3596 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3597 {
3598 rlp.rlim_cur = rlp.rlim_max = 256;
3599 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3600 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3601 strerror(errno));
3602 }
3603 }
3604 #endif
3605
3606 #ifdef RLIMIT_NPROC
3607 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3608 {
3609 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3610 strerror(errno));
3611 rlp.rlim_cur = rlp.rlim_max = 0;
3612 }
3613
3614 #ifdef RLIM_INFINITY
3615 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3616 {
3617 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3618 #else
3619 if (rlp.rlim_cur < 1000)
3620 {
3621 rlp.rlim_cur = rlp.rlim_max = 1000;
3622 #endif
3623 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3624 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3625 strerror(errno));
3626 }
3627 #endif
3628 }
3629
3630 /* Exim is normally entered as root (but some special configurations are
3631 possible that don't do this). However, it always spins off sub-processes that
3632 set their uid and gid as required for local delivery. We don't want to pass on
3633 any extra groups that root may belong to, so we want to get rid of them all at
3634 this point.
3635
3636 We need to obey setgroups() at this stage, before possibly giving up root
3637 privilege for a changed configuration file, but later on we might need to
3638 check on the additional groups for the admin user privilege - can't do that
3639 till after reading the config, which might specify the exim gid. Therefore,
3640 save the group list here first. */
3641
3642 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3643 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3644
3645 /* There is a fundamental difference in some BSD systems in the matter of
3646 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3647 known not to be different. On the "different" systems there is a single group
3648 list, and the first entry in it is the current group. On all other versions of
3649 Unix there is a supplementary group list, which is in *addition* to the current
3650 group. Consequently, to get rid of all extraneous groups on a "standard" system
3651 you pass over 0 groups to setgroups(), while on a "different" system you pass
3652 over a single group - the current group, which is always the first group in the
3653 list. Calling setgroups() with zero groups on a "different" system results in
3654 an error return. The following code should cope with both types of system.
3655
3656 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3657 the "setgroups() with zero groups" - and changes the egid.
3658 Thanks to that we had to stash the original_egid above, for use below
3659 in the call to exim_setugid().
3660
3661 However, if this process isn't running as root, setgroups() can't be used
3662 since you have to be root to run it, even if throwing away groups.
3663 Except, sigh, for Hurd - where you can.
3664 Not being root here happens only in some unusual configurations. */
3665
3666 if ( !unprivileged
3667 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3668 && setgroups(0, NULL) != 0
3669 #endif
3670 && setgroups(1, group_list) != 0)
3671 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3672
3673 /* If the configuration file name has been altered by an argument on the
3674 command line (either a new file name or a macro definition) and the caller is
3675 not root, or if this is a filter testing run, remove any setuid privilege the
3676 program has and run as the underlying user.
3677
3678 The exim user is locked out of this, which severely restricts the use of -C
3679 for some purposes.
3680
3681 Otherwise, set the real ids to the effective values (should be root unless run
3682 from inetd, which it can either be root or the exim uid, if one is configured).
3683
3684 There is a private mechanism for bypassing some of this, in order to make it
3685 possible to test lots of configurations automatically, without having either to
3686 recompile each time, or to patch in an actual configuration file name and other
3687 values (such as the path name). If running in the test harness, pretend that
3688 configuration file changes and macro definitions haven't happened. */
3689
3690 if (( /* EITHER */
3691 (!f.trusted_config || /* Config changed, or */
3692 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3693 real_uid != root_uid && /* Not root, and */
3694 !f.running_in_test_harness /* Not fudged */
3695 ) || /* OR */
3696 expansion_test /* expansion testing */
3697 || /* OR */
3698 filter_test != FTEST_NONE) /* Filter testing */
3699 {
3700 setgroups(group_count, group_list);
3701 exim_setugid(real_uid, real_gid, FALSE,
3702 US"-C, -D, -be or -bf forces real uid");
3703 removed_privilege = TRUE;
3704
3705 /* In the normal case when Exim is called like this, stderr is available
3706 and should be used for any logging information because attempts to write
3707 to the log will usually fail. To arrange this, we unset really_exim. However,
3708 if no stderr is available there is no point - we might as well have a go
3709 at the log (if it fails, syslog will be written).
3710
3711 Note that if the invoker is Exim, the logs remain available. Messing with
3712 this causes unlogged successful deliveries. */
3713
3714 if (log_stderr && real_uid != exim_uid)
3715 f.really_exim = FALSE;
3716 }
3717
3718 /* Privilege is to be retained for the moment. It may be dropped later,
3719 depending on the job that this Exim process has been asked to do. For now, set
3720 the real uid to the effective so that subsequent re-execs of Exim are done by a
3721 privileged user. */
3722
3723 else
3724 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3725
3726 /* If testing a filter, open the file(s) now, before wasting time doing other
3727 setups and reading the message. */
3728
3729 if (filter_test & FTEST_SYSTEM)
3730 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3731 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3732 strerror(errno));
3733
3734 if (filter_test & FTEST_USER)
3735 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3736 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3737 strerror(errno));
3738
3739 /* Initialise lookup_list
3740 If debugging, already called above via version reporting.
3741 In either case, we initialise the list of available lookups while running
3742 as root. All dynamically modules are loaded from a directory which is
3743 hard-coded into the binary and is code which, if not a module, would be
3744 part of Exim already. Ability to modify the content of the directory
3745 is equivalent to the ability to modify a setuid binary!
3746
3747 This needs to happen before we read the main configuration. */
3748 init_lookup_list();
3749
3750 #ifdef SUPPORT_I18N
3751 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3752 #endif
3753
3754 /* Read the main runtime configuration data; this gives up if there
3755 is a failure. It leaves the configuration file open so that the subsequent
3756 configuration data for delivery can be read if needed.
3757
3758 NOTE: immediately after opening the configuration file we change the working
3759 directory to "/"! Later we change to $spool_directory. We do it there, because
3760 during readconf_main() some expansion takes place already. */
3761
3762 /* Store the initial cwd before we change directories. Can be NULL if the
3763 dir has already been unlinked. */
3764 initial_cwd = os_getcwd(NULL, 0);
3765
3766 /* checking:
3767 -be[m] expansion test -
3768 -b[fF] filter test new
3769 -bh[c] host test -
3770 -bmalware malware_test_file new
3771 -brt retry test new
3772 -brw rewrite test new
3773 -bt address test -
3774 -bv[s] address verify -
3775 list_options:
3776 -bP <option> (except -bP config, which sets list_config)
3777
3778 If any of these options is set, we suppress warnings about configuration
3779 issues (currently about tls_advertise_hosts and keep_environment not being
3780 defined) */
3781
3782 {
3783 #ifdef MEASURE_TIMING
3784 struct timeval t0, diff;
3785 (void)gettimeofday(&t0, NULL);
3786 #endif
3787
3788 readconf_main(checking || list_options);
3789
3790 #ifdef MEASURE_TIMING
3791 report_time_since(&t0, US"readconf_main (delta)");
3792 #endif
3793 }
3794
3795
3796 /* Now in directory "/" */
3797
3798 if (cleanup_environment() == FALSE)
3799 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3800
3801
3802 /* If an action on specific messages is requested, or if a daemon or queue
3803 runner is being started, we need to know if Exim was called by an admin user.
3804 This is the case if the real user is root or exim, or if the real group is
3805 exim, or if one of the supplementary groups is exim or a group listed in
3806 admin_groups. We don't fail all message actions immediately if not admin_user,
3807 since some actions can be performed by non-admin users. Instead, set admin_user
3808 for later interrogation. */
3809
3810 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3811 f.admin_user = TRUE;
3812 else
3813 for (int i = 0; i < group_count && !f.admin_user; i++)
3814 if (group_list[i] == exim_gid)
3815 f.admin_user = TRUE;
3816 else if (admin_groups)
3817 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3818 if (admin_groups[j] == group_list[i])
3819 f.admin_user = TRUE;
3820
3821 /* Another group of privileged users are the trusted users. These are root,
3822 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3823 are permitted to specify sender_addresses with -f on the command line, and
3824 other message parameters as well. */
3825
3826 if (real_uid == root_uid || real_uid == exim_uid)
3827 f.trusted_caller = TRUE;
3828 else
3829 {
3830 if (trusted_users)
3831 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3832 if (trusted_users[i] == real_uid)
3833 f.trusted_caller = TRUE;
3834
3835 if (trusted_groups)
3836 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3837 if (trusted_groups[i] == real_gid)
3838 f.trusted_caller = TRUE;
3839 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3840 if (trusted_groups[i] == group_list[j])
3841 f.trusted_caller = TRUE;
3842 }
3843
3844 /* At this point, we know if the user is privileged and some command-line
3845 options become possibly impermissible, depending upon the configuration file. */
3846
3847 if (checking && commandline_checks_require_admin && !f.admin_user)
3848 exim_fail("exim: those command-line flags are set to require admin\n");
3849
3850 /* Handle the decoding of logging options. */
3851
3852 decode_bits(log_selector, log_selector_size, log_notall,
3853 log_selector_string, log_options, log_options_count, US"log", 0);
3854
3855 DEBUG(D_any)
3856 {
3857 debug_printf("configuration file is %s\n", config_main_filename);
3858 debug_printf("log selectors =");
3859 for (int i = 0; i < log_selector_size; i++)
3860 debug_printf(" %08x", log_selector[i]);
3861 debug_printf("\n");
3862 }
3863
3864 /* If domain literals are not allowed, check the sender address that was
3865 supplied with -f. Ditto for a stripped trailing dot. */
3866
3867 if (sender_address)
3868 {
3869 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3870 exim_fail("exim: bad -f address \"%s\": domain literals not "
3871 "allowed\n", sender_address);
3872 if (f_end_dot && !strip_trailing_dot)
3873 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3874 "(trailing dot not allowed)\n", sender_address);
3875 }
3876
3877 /* See if an admin user overrode our logging. */
3878
3879 if (cmdline_syslog_name)
3880 if (f.admin_user)
3881 {
3882 syslog_processname = cmdline_syslog_name;
3883 log_file_path = string_copy(CUS"syslog");
3884 }
3885 else
3886 /* not a panic, non-privileged users should not be able to spam paniclog */
3887 exim_fail(
3888 "exim: you lack sufficient privilege to specify syslog process name\n");
3889
3890 /* Paranoia check of maximum lengths of certain strings. There is a check
3891 on the length of the log file path in log.c, which will come into effect
3892 if there are any calls to write the log earlier than this. However, if we
3893 get this far but the string is very long, it is better to stop now than to
3894 carry on and (e.g.) receive a message and then have to collapse. The call to
3895 log_write() from here will cause the ultimate panic collapse if the complete
3896 file name exceeds the buffer length. */
3897
3898 if (Ustrlen(log_file_path) > 200)
3899 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3900 "log_file_path