tidying
[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_LMDB
976 fprintf(fp, " Experimental_LMDB");
977 #endif
978 #ifdef EXPERIMENTAL_QUEUEFILE
979 fprintf(fp, " Experimental_QUEUEFILE");
980 #endif
981 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
982 fprintf(fp, " Experimental_SRS");
983 #endif
984 #ifdef EXPERIMENTAL_ARC
985 fprintf(fp, " Experimental_ARC");
986 #endif
987 #ifdef EXPERIMENTAL_BRIGHTMAIL
988 fprintf(fp, " Experimental_Brightmail");
989 #endif
990 #ifdef EXPERIMENTAL_DCC
991 fprintf(fp, " Experimental_DCC");
992 #endif
993 #ifdef EXPERIMENTAL_DSN_INFO
994 fprintf(fp, " Experimental_DSN_info");
995 #endif
996 #ifdef EXPERIMENTAL_TLS_RESUME
997 fprintf(fp, " Experimental_TLS_resume");
998 #endif
999 fprintf(fp, "\n");
1000
1001 fprintf(fp, "Lookups (built-in):");
1002 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1003 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1004 #endif
1005 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1006 fprintf(fp, " cdb");
1007 #endif
1008 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1009 fprintf(fp, " dbm dbmjz dbmnz");
1010 #endif
1011 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1012 fprintf(fp, " dnsdb");
1013 #endif
1014 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1015 fprintf(fp, " dsearch");
1016 #endif
1017 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1018 fprintf(fp, " ibase");
1019 #endif
1020 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1021 fprintf(fp, " json");
1022 #endif
1023 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1024 fprintf(fp, " ldap ldapdn ldapm");
1025 #endif
1026 #ifdef EXPERIMENTAL_LMDB
1027 fprintf(fp, " lmdb");
1028 #endif
1029 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1030 fprintf(fp, " mysql");
1031 #endif
1032 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1033 fprintf(fp, " nis nis0");
1034 #endif
1035 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1036 fprintf(fp, " nisplus");
1037 #endif
1038 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1039 fprintf(fp, " oracle");
1040 #endif
1041 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1042 fprintf(fp, " passwd");
1043 #endif
1044 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1045 fprintf(fp, " pgsql");
1046 #endif
1047 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1048 fprintf(fp, " redis");
1049 #endif
1050 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1051 fprintf(fp, " sqlite");
1052 #endif
1053 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1054 fprintf(fp, " testdb");
1055 #endif
1056 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1057 fprintf(fp, " whoson");
1058 #endif
1059 fprintf(fp, "\n");
1060
1061 auth_show_supported(fp);
1062 route_show_supported(fp);
1063 transport_show_supported(fp);
1064
1065 #ifdef WITH_CONTENT_SCAN
1066 malware_show_supported(fp);
1067 #endif
1068
1069 if (fixed_never_users[0] > 0)
1070 {
1071 int i;
1072 fprintf(fp, "Fixed never_users: ");
1073 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1074 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1075 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1076 }
1077
1078 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1079
1080 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1081
1082 /* Everything else is details which are only worth reporting when debugging.
1083 Perhaps the tls_version_report should move into this too. */
1084 DEBUG(D_any) do {
1085
1086 /* clang defines __GNUC__ (at least, for me) so test for it first */
1087 #if defined(__clang__)
1088 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1089 #elif defined(__GNUC__)
1090 fprintf(fp, "Compiler: GCC [%s]\n",
1091 # ifdef __VERSION__
1092 __VERSION__
1093 # else
1094 "? unknown version ?"
1095 # endif
1096 );
1097 #else
1098 fprintf(fp, "Compiler: <unknown>\n");
1099 #endif
1100
1101 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1102 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1103 __GLIBC__, __GLIBC_MINOR__);
1104 if (__GLIBC_PREREQ(2, 1))
1105 fprintf(fp, " Runtime: %s\n",
1106 gnu_get_libc_version());
1107 #endif
1108
1109 show_db_version(fp);
1110
1111 #ifndef DISABLE_TLS
1112 tls_version_report(fp);
1113 #endif
1114 #ifdef SUPPORT_I18N
1115 utf8_version_report(fp);
1116 #endif
1117 #ifdef SUPPORT_SPF
1118 spf_lib_version_report(fp);
1119 #endif
1120
1121 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1122 if (authi->version_report)
1123 (*authi->version_report)(fp);
1124
1125 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1126 characters; unless it's an ancient version of PCRE in which case it
1127 is not defined. */
1128 #ifndef PCRE_PRERELEASE
1129 # define PCRE_PRERELEASE
1130 #endif
1131 #define QUOTE(X) #X
1132 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1133 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1134 " Runtime: %s\n",
1135 PCRE_MAJOR, PCRE_MINOR,
1136 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1137 pcre_version());
1138 #undef QUOTE
1139 #undef EXPAND_AND_QUOTE
1140
1141 init_lookup_list();
1142 for (int i = 0; i < lookup_list_count; i++)
1143 if (lookup_list[i]->version_report)
1144 lookup_list[i]->version_report(fp);
1145
1146 #ifdef WHITELIST_D_MACROS
1147 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1148 #else
1149 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1150 #endif
1151 #ifdef TRUSTED_CONFIG_LIST
1152 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1153 #else
1154 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1155 #endif
1156
1157 } while (0);
1158 }
1159
1160
1161 /*************************************************
1162 * Show auxiliary information about Exim *
1163 *************************************************/
1164
1165 static void
1166 show_exim_information(enum commandline_info request, FILE *stream)
1167 {
1168 switch(request)
1169 {
1170 case CMDINFO_NONE:
1171 fprintf(stream, "Oops, something went wrong.\n");
1172 return;
1173 case CMDINFO_HELP:
1174 fprintf(stream,
1175 "The -bI: flag takes a string indicating which information to provide.\n"
1176 "If the string is not recognised, you'll get this help (on stderr).\n"
1177 "\n"
1178 " exim -bI:help this information\n"
1179 " exim -bI:dscp list of known dscp value keywords\n"
1180 " exim -bI:sieve list of supported sieve extensions\n"
1181 );
1182 return;
1183 case CMDINFO_SIEVE:
1184 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1185 fprintf(stream, "%s\n", *pp);
1186 return;
1187 case CMDINFO_DSCP:
1188 dscp_list_to_stream(stream);
1189 return;
1190 }
1191 }
1192
1193
1194 /*************************************************
1195 * Quote a local part *
1196 *************************************************/
1197
1198 /* This function is used when a sender address or a From: or Sender: header
1199 line is being created from the caller's login, or from an authenticated_id. It
1200 applies appropriate quoting rules for a local part.
1201
1202 Argument: the local part
1203 Returns: the local part, quoted if necessary
1204 */
1205
1206 uschar *
1207 local_part_quote(uschar *lpart)
1208 {
1209 BOOL needs_quote = FALSE;
1210 gstring * g;
1211
1212 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1213 {
1214 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1215 (*t != '.' || t == lpart || t[1] == 0);
1216 }
1217
1218 if (!needs_quote) return lpart;
1219
1220 g = string_catn(NULL, US"\"", 1);
1221
1222 for (;;)
1223 {
1224 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1225 if (nq == NULL)
1226 {
1227 g = string_cat(g, lpart);
1228 break;
1229 }
1230 g = string_catn(g, lpart, nq - lpart);
1231 g = string_catn(g, US"\\", 1);
1232 g = string_catn(g, nq, 1);
1233 lpart = nq + 1;
1234 }
1235
1236 g = string_catn(g, US"\"", 1);
1237 return string_from_gstring(g);
1238 }
1239
1240
1241
1242 #ifdef USE_READLINE
1243 /*************************************************
1244 * Load readline() functions *
1245 *************************************************/
1246
1247 /* This function is called from testing executions that read data from stdin,
1248 but only when running as the calling user. Currently, only -be does this. The
1249 function loads the readline() function library and passes back the functions.
1250 On some systems, it needs the curses library, so load that too, but try without
1251 it if loading fails. All this functionality has to be requested at build time.
1252
1253 Arguments:
1254 fn_readline_ptr pointer to where to put the readline pointer
1255 fn_addhist_ptr pointer to where to put the addhistory function
1256
1257 Returns: the dlopen handle or NULL on failure
1258 */
1259
1260 static void *
1261 set_readline(char * (**fn_readline_ptr)(const char *),
1262 void (**fn_addhist_ptr)(const char *))
1263 {
1264 void *dlhandle;
1265 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1266
1267 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1268 if (dlhandle_curses) dlclose(dlhandle_curses);
1269
1270 if (dlhandle)
1271 {
1272 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1273 * char * readline (const char *prompt);
1274 * void add_history (const char *string);
1275 */
1276 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1277 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1278 }
1279 else
1280 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1281
1282 return dlhandle;
1283 }
1284 #endif
1285
1286
1287
1288 /*************************************************
1289 * Get a line from stdin for testing things *
1290 *************************************************/
1291
1292 /* This function is called when running tests that can take a number of lines
1293 of input (for example, -be and -bt). It handles continuations and trailing
1294 spaces. And prompting and a blank line output on eof. If readline() is in use,
1295 the arguments are non-NULL and provide the relevant functions.
1296
1297 Arguments:
1298 fn_readline readline function or NULL
1299 fn_addhist addhist function or NULL
1300
1301 Returns: pointer to dynamic memory, or NULL at end of file
1302 */
1303
1304 static uschar *
1305 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1306 {
1307 gstring * g = NULL;
1308
1309 if (!fn_readline) { printf("> "); fflush(stdout); }
1310
1311 for (int i = 0;; i++)
1312 {
1313 uschar buffer[1024];
1314 uschar *p, *ss;
1315
1316 #ifdef USE_READLINE
1317 char *readline_line = NULL;
1318 if (fn_readline)
1319 {
1320 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1321 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1322 p = US readline_line;
1323 }
1324 else
1325 #endif
1326
1327 /* readline() not in use */
1328
1329 {
1330 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1331 p = buffer;
1332 }
1333
1334 /* Handle the line */
1335
1336 ss = p + (int)Ustrlen(p);
1337 while (ss > p && isspace(ss[-1])) ss--;
1338
1339 if (i > 0)
1340 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1341
1342 g = string_catn(g, p, ss - p);
1343
1344 #ifdef USE_READLINE
1345 if (fn_readline) free(readline_line);
1346 #endif
1347
1348 /* g can only be NULL if ss==p */
1349 if (ss == p || g->s[g->ptr-1] != '\\')
1350 break;
1351
1352 --g->ptr;
1353 (void) string_from_gstring(g);
1354 }
1355
1356 if (!g) printf("\n");
1357 return string_from_gstring(g);
1358 }
1359
1360
1361
1362 /*************************************************
1363 * Output usage information for the program *
1364 *************************************************/
1365
1366 /* This function is called when there are no recipients
1367 or a specific --help argument was added.
1368
1369 Arguments:
1370 progname information on what name we were called by
1371
1372 Returns: DOES NOT RETURN
1373 */
1374
1375 static void
1376 exim_usage(uschar *progname)
1377 {
1378
1379 /* Handle specific program invocation variants */
1380 if (Ustrcmp(progname, US"-mailq") == 0)
1381 exim_fail(
1382 "mailq - list the contents of the mail queue\n\n"
1383 "For a list of options, see the Exim documentation.\n");
1384
1385 /* Generic usage - we output this whatever happens */
1386 exim_fail(
1387 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1388 "not directly from a shell command line. Options and/or arguments control\n"
1389 "what it does when called. For a list of options, see the Exim documentation.\n");
1390 }
1391
1392
1393
1394 /*************************************************
1395 * Validate that the macros given are okay *
1396 *************************************************/
1397
1398 /* Typically, Exim will drop privileges if macros are supplied. In some
1399 cases, we want to not do so.
1400
1401 Arguments: opt_D_used - true if the commandline had a "-D" option
1402 Returns: true if trusted, false otherwise
1403 */
1404
1405 static BOOL
1406 macros_trusted(BOOL opt_D_used)
1407 {
1408 #ifdef WHITELIST_D_MACROS
1409 uschar *whitelisted, *end, *p, **whites;
1410 int white_count, i, n;
1411 size_t len;
1412 BOOL prev_char_item, found;
1413 #endif
1414
1415 if (!opt_D_used)
1416 return TRUE;
1417 #ifndef WHITELIST_D_MACROS
1418 return FALSE;
1419 #else
1420
1421 /* We only trust -D overrides for some invoking users:
1422 root, the exim run-time user, the optional config owner user.
1423 I don't know why config-owner would be needed, but since they can own the
1424 config files anyway, there's no security risk to letting them override -D. */
1425 if ( ! ((real_uid == root_uid)
1426 || (real_uid == exim_uid)
1427 #ifdef CONFIGURE_OWNER
1428 || (real_uid == config_uid)
1429 #endif
1430 ))
1431 {
1432 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1433 return FALSE;
1434 }
1435
1436 /* Get a list of macros which are whitelisted */
1437 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1438 prev_char_item = FALSE;
1439 white_count = 0;
1440 for (p = whitelisted; *p != '\0'; ++p)
1441 {
1442 if (*p == ':' || isspace(*p))
1443 {
1444 *p = '\0';
1445 if (prev_char_item)
1446 ++white_count;
1447 prev_char_item = FALSE;
1448 continue;
1449 }
1450 if (!prev_char_item)
1451 prev_char_item = TRUE;
1452 }
1453 end = p;
1454 if (prev_char_item)
1455 ++white_count;
1456 if (!white_count)
1457 return FALSE;
1458 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1459 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1460 {
1461 if (*p != '\0')
1462 {
1463 whites[i++] = p;
1464 if (i == white_count)
1465 break;
1466 while (*p != '\0' && p < end)
1467 ++p;
1468 }
1469 }
1470 whites[i] = NULL;
1471
1472 /* The list of commandline macros should be very short.
1473 Accept the N*M complexity. */
1474 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1475 {
1476 found = FALSE;
1477 for (uschar ** w = whites; *w; ++w)
1478 if (Ustrcmp(*w, m->name) == 0)
1479 {
1480 found = TRUE;
1481 break;
1482 }
1483 if (!found)
1484 return FALSE;
1485 if (!m->replacement)
1486 continue;
1487 if ((len = m->replen) == 0)
1488 continue;
1489 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1490 0, PCRE_EOPT, NULL, 0);
1491 if (n < 0)
1492 {
1493 if (n != PCRE_ERROR_NOMATCH)
1494 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1495 return FALSE;
1496 }
1497 }
1498 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1499 return TRUE;
1500 #endif
1501 }
1502
1503
1504 /*************************************************
1505 * Expansion testing *
1506 *************************************************/
1507
1508 /* Expand and print one item, doing macro-processing.
1509
1510 Arguments:
1511 item line for expansion
1512 */
1513
1514 static void
1515 expansion_test_line(uschar * line)
1516 {
1517 int len;
1518 BOOL dummy_macexp;
1519
1520 Ustrncpy(big_buffer, line, big_buffer_size);
1521 big_buffer[big_buffer_size-1] = '\0';
1522 len = Ustrlen(big_buffer);
1523
1524 (void) macros_expand(0, &len, &dummy_macexp);
1525
1526 if (isupper(big_buffer[0]))
1527 {
1528 if (macro_read_assignment(big_buffer))
1529 printf("Defined macro '%s'\n", mlast->name);
1530 }
1531 else
1532 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1533 else printf("Failed: %s\n", expand_string_message);
1534 }
1535
1536
1537
1538 /*************************************************
1539 * Entry point and high-level code *
1540 *************************************************/
1541
1542 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1543 the appropriate action. All the necessary functions are present in the one
1544 binary. I originally thought one should split it up, but it turns out that so
1545 much of the apparatus is needed in each chunk that one might as well just have
1546 it all available all the time, which then makes the coding easier as well.
1547
1548 Arguments:
1549 argc count of entries in argv
1550 argv argument strings, with argv[0] being the program name
1551
1552 Returns: EXIT_SUCCESS if terminated successfully
1553 EXIT_FAILURE otherwise, except when a message has been sent
1554 to the sender, and -oee was given
1555 */
1556
1557 int
1558 main(int argc, char **cargv)
1559 {
1560 uschar **argv = USS cargv;
1561 int arg_receive_timeout = -1;
1562 int arg_smtp_receive_timeout = -1;
1563 int arg_error_handling = error_handling;
1564 int filter_sfd = -1;
1565 int filter_ufd = -1;
1566 int group_count;
1567 int i, rv;
1568 int list_queue_option = 0;
1569 int msg_action = 0;
1570 int msg_action_arg = -1;
1571 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1572 int queue_only_reason = 0;
1573 #ifdef EXIM_PERL
1574 int perl_start_option = 0;
1575 #endif
1576 int recipients_arg = argc;
1577 int sender_address_domain = 0;
1578 int test_retry_arg = -1;
1579 int test_rewrite_arg = -1;
1580 gid_t original_egid;
1581 BOOL arg_queue_only = FALSE;
1582 BOOL bi_option = FALSE;
1583 BOOL checking = FALSE;
1584 BOOL count_queue = FALSE;
1585 BOOL expansion_test = FALSE;
1586 BOOL extract_recipients = FALSE;
1587 BOOL flag_G = FALSE;
1588 BOOL flag_n = FALSE;
1589 BOOL forced_delivery = FALSE;
1590 BOOL f_end_dot = FALSE;
1591 BOOL deliver_give_up = FALSE;
1592 BOOL list_queue = FALSE;
1593 BOOL list_options = FALSE;
1594 BOOL list_config = FALSE;
1595 BOOL local_queue_only;
1596 BOOL more = TRUE;
1597 BOOL one_msg_action = FALSE;
1598 BOOL opt_D_used = FALSE;
1599 BOOL queue_only_set = FALSE;
1600 BOOL receiving_message = TRUE;
1601 BOOL sender_ident_set = FALSE;
1602 BOOL session_local_queue_only;
1603 BOOL unprivileged;
1604 BOOL removed_privilege = FALSE;
1605 BOOL usage_wanted = FALSE;
1606 BOOL verify_address_mode = FALSE;
1607 BOOL verify_as_sender = FALSE;
1608 BOOL version_printed = FALSE;
1609 uschar *alias_arg = NULL;
1610 uschar *called_as = US"";
1611 uschar *cmdline_syslog_name = NULL;
1612 uschar *start_queue_run_id = NULL;
1613 uschar *stop_queue_run_id = NULL;
1614 uschar *expansion_test_message = NULL;
1615 uschar *ftest_domain = NULL;
1616 uschar *ftest_localpart = NULL;
1617 uschar *ftest_prefix = NULL;
1618 uschar *ftest_suffix = NULL;
1619 uschar *log_oneline = NULL;
1620 uschar *malware_test_file = NULL;
1621 uschar *real_sender_address;
1622 uschar *originator_home = US"/";
1623 size_t sz;
1624 rmark reset_point;
1625
1626 struct passwd *pw;
1627 struct stat statbuf;
1628 pid_t passed_qr_pid = (pid_t)0;
1629 int passed_qr_pipe = -1;
1630 gid_t group_list[EXIM_GROUPLIST_SIZE];
1631
1632 /* For the -bI: flag */
1633 enum commandline_info info_flag = CMDINFO_NONE;
1634 BOOL info_stdout = FALSE;
1635
1636 /* Possible options for -R and -S */
1637
1638 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1639
1640 /* Need to define this in case we need to change the environment in order
1641 to get rid of a bogus time zone. We have to make it char rather than uschar
1642 because some OS define it in /usr/include/unistd.h. */
1643
1644 extern char **environ;
1645
1646 #ifdef MEASURE_TIMING
1647 (void)gettimeofday(&timestamp_startup, NULL);
1648 #endif
1649
1650 /* If the Exim user and/or group and/or the configuration file owner/group were
1651 defined by ref:name at build time, we must now find the actual uid/gid values.
1652 This is a feature to make the lives of binary distributors easier. */
1653
1654 #ifdef EXIM_USERNAME
1655 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1656 {
1657 if (exim_uid == 0)
1658 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1659
1660 /* If ref:name uses a number as the name, route_finduser() returns
1661 TRUE with exim_uid set and pw coerced to NULL. */
1662 if (pw)
1663 exim_gid = pw->pw_gid;
1664 #ifndef EXIM_GROUPNAME
1665 else
1666 exim_fail(
1667 "exim: ref:name should specify a usercode, not a group.\n"
1668 "exim: can't let you get away with it unless you also specify a group.\n");
1669 #endif
1670 }
1671 else
1672 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1673 #endif
1674
1675 #ifdef EXIM_GROUPNAME
1676 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1677 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1678 #endif
1679
1680 #ifdef CONFIGURE_OWNERNAME
1681 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1682 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1683 CONFIGURE_OWNERNAME);
1684 #endif
1685
1686 /* We default the system_filter_user to be the Exim run-time user, as a
1687 sane non-root value. */
1688 system_filter_uid = exim_uid;
1689
1690 #ifdef CONFIGURE_GROUPNAME
1691 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1692 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1693 CONFIGURE_GROUPNAME);
1694 #endif
1695
1696 /* In the Cygwin environment, some initialization used to need doing.
1697 It was fudged in by means of this macro; now no longer but we'll leave
1698 it in case of others. */
1699
1700 #ifdef OS_INIT
1701 OS_INIT
1702 #endif
1703
1704 /* Check a field which is patched when we are running Exim within its
1705 testing harness; do a fast initial check, and then the whole thing. */
1706
1707 f.running_in_test_harness =
1708 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1709 if (f.running_in_test_harness)
1710 debug_store = TRUE;
1711
1712 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1713 at the start of a program; however, it seems that some environments do not
1714 follow this. A "strange" locale can affect the formatting of timestamps, so we
1715 make quite sure. */
1716
1717 setlocale(LC_ALL, "C");
1718
1719 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1720
1721 #ifdef _POSIX_MONOTONIC_CLOCK
1722 exim_clock_init();
1723 #endif
1724
1725 /* Set up the default handler for timing using alarm(). */
1726
1727 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1728
1729 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1730 because store_malloc writes a log entry on failure. */
1731
1732 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1733 exim_fail("exim: failed to get store for log buffer\n");
1734
1735 /* Initialize the default log options. */
1736
1737 bits_set(log_selector, log_selector_size, log_default);
1738
1739 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1740 NULL when the daemon is run and the file is closed. We have to use this
1741 indirection, because some systems don't allow writing to the variable "stderr".
1742 */
1743
1744 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1745
1746 /* Arrange for the PCRE regex library to use our store functions. Note that
1747 the normal calls are actually macros that add additional arguments for
1748 debugging purposes so we have to assign specially constructed functions here.
1749 The default is to use store in the stacking pool, but this is overridden in the
1750 regex_must_compile() function. */
1751
1752 pcre_malloc = function_store_get;
1753 pcre_free = function_dummy_free;
1754
1755 /* Ensure there is a big buffer for temporary use in several places. It is put
1756 in malloc store so that it can be freed for enlargement if necessary. */
1757
1758 big_buffer = store_malloc(big_buffer_size);
1759
1760 /* Set up the handler for the data request signal, and set the initial
1761 descriptive text. */
1762
1763 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1764 set_process_info("initializing");
1765 os_restarting_signal(SIGUSR1, usr1_handler);
1766
1767 /* If running in a dockerized environment, the TERM signal is only
1768 delegated to the PID 1 if we request it by setting an signal handler */
1769 if (getpid() == 1) signal(SIGTERM, term_handler);
1770
1771 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1772 in the daemon code. For the rest of Exim's uses, we ignore it. */
1773
1774 signal(SIGHUP, SIG_IGN);
1775
1776 /* We don't want to die on pipe errors as the code is written to handle
1777 the write error instead. */
1778
1779 signal(SIGPIPE, SIG_IGN);
1780
1781 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1782 set to SIG_IGN. This causes subprocesses that complete before the parent
1783 process waits for them not to hang around, so when Exim calls wait(), nothing
1784 is there. The wait() code has been made robust against this, but let's ensure
1785 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1786 ending status. We use sigaction rather than plain signal() on those OS where
1787 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1788 problem on AIX with this.) */
1789
1790 #ifdef SA_NOCLDWAIT
1791 {
1792 struct sigaction act;
1793 act.sa_handler = SIG_DFL;
1794 sigemptyset(&(act.sa_mask));
1795 act.sa_flags = 0;
1796 sigaction(SIGCHLD, &act, NULL);
1797 }
1798 #else
1799 signal(SIGCHLD, SIG_DFL);
1800 #endif
1801
1802 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1803 SIGHUP. */
1804
1805 sighup_argv = argv;
1806
1807 /* Set up the version number. Set up the leading 'E' for the external form of
1808 message ids, set the pointer to the internal form, and initialize it to
1809 indicate no message being processed. */
1810
1811 version_init();
1812 message_id_option[0] = '-';
1813 message_id_external = message_id_option + 1;
1814 message_id_external[0] = 'E';
1815 message_id = message_id_external + 1;
1816 message_id[0] = 0;
1817
1818 /* Set the umask to zero so that any files Exim creates using open() are
1819 created with the modes that it specifies. NOTE: Files created with fopen() have
1820 a problem, which was not recognized till rather late (February 2006). With this
1821 umask, such files will be world writeable. (They are all content scanning files
1822 in the spool directory, which isn't world-accessible, so this is not a
1823 disaster, but it's untidy.) I don't want to change this overall setting,
1824 however, because it will interact badly with the open() calls. Instead, there's
1825 now a function called modefopen() that fiddles with the umask while calling
1826 fopen(). */
1827
1828 (void)umask(0);
1829
1830 /* Precompile the regular expression for matching a message id. Keep this in
1831 step with the code that generates ids in the accept.c module. We need to do
1832 this here, because the -M options check their arguments for syntactic validity
1833 using mac_ismsgid, which uses this. */
1834
1835 regex_ismsgid =
1836 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1837
1838 /* Precompile the regular expression that is used for matching an SMTP error
1839 code, possibly extended, at the start of an error message. Note that the
1840 terminating whitespace character is included. */
1841
1842 regex_smtp_code =
1843 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1844 FALSE, TRUE);
1845
1846 #ifdef WHITELIST_D_MACROS
1847 /* Precompile the regular expression used to filter the content of macros
1848 given to -D for permissibility. */
1849
1850 regex_whitelisted_macro =
1851 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1852 #endif
1853
1854 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1855
1856 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1857 this seems to be a generally accepted convention, since one finds symbolic
1858 links called "mailq" in standard OS configurations. */
1859
1860 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1861 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1862 {
1863 list_queue = TRUE;
1864 receiving_message = FALSE;
1865 called_as = US"-mailq";
1866 }
1867
1868 /* If the program is called as "rmail" treat it as equivalent to
1869 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1870 i.e. preventing a single dot on a line from terminating the message, and
1871 returning with zero return code, even in cases of error (provided an error
1872 message has been sent). */
1873
1874 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1875 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1876 {
1877 f.dot_ends = FALSE;
1878 called_as = US"-rmail";
1879 errors_sender_rc = EXIT_SUCCESS;
1880 }
1881
1882 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1883 this is a smail convention. */
1884
1885 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1886 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1887 {
1888 smtp_input = smtp_batched_input = TRUE;
1889 called_as = US"-rsmtp";
1890 }
1891
1892 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1893 this is a smail convention. */
1894
1895 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1896 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1897 {
1898 queue_interval = 0;
1899 receiving_message = FALSE;
1900 called_as = US"-runq";
1901 }
1902
1903 /* If the program is called as "newaliases" treat it as equivalent to
1904 "exim -bi"; this is a sendmail convention. */
1905
1906 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1907 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1908 {
1909 bi_option = TRUE;
1910 receiving_message = FALSE;
1911 called_as = US"-newaliases";
1912 }
1913
1914 /* Save the original effective uid for a couple of uses later. It should
1915 normally be root, but in some esoteric environments it may not be. */
1916
1917 original_euid = geteuid();
1918 original_egid = getegid();
1919
1920 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1921 to be the same as the real ones. This makes a difference only if Exim is setuid
1922 (or setgid) to something other than root, which could be the case in some
1923 special configurations. */
1924
1925 real_uid = getuid();
1926 real_gid = getgid();
1927
1928 if (real_uid == root_uid)
1929 {
1930 if ((rv = setgid(real_gid)))
1931 exim_fail("exim: setgid(%ld) failed: %s\n",
1932 (long int)real_gid, strerror(errno));
1933 if ((rv = setuid(real_uid)))
1934 exim_fail("exim: setuid(%ld) failed: %s\n",
1935 (long int)real_uid, strerror(errno));
1936 }
1937
1938 /* If neither the original real uid nor the original euid was root, Exim is
1939 running in an unprivileged state. */
1940
1941 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1942
1943 /* Scan the program's arguments. Some can be dealt with right away; others are
1944 simply recorded for checking and handling afterwards. Do a high-level switch
1945 on the second character (the one after '-'), to save some effort. */
1946
1947 for (i = 1; i < argc; i++)
1948 {
1949 BOOL badarg = FALSE;
1950 uschar *arg = argv[i];
1951 uschar *argrest;
1952 int switchchar;
1953
1954 /* An argument not starting with '-' is the start of a recipients list;
1955 break out of the options-scanning loop. */
1956
1957 if (arg[0] != '-')
1958 {
1959 recipients_arg = i;
1960 break;
1961 }
1962
1963 /* An option consisting of -- terminates the options */
1964
1965 if (Ustrcmp(arg, "--") == 0)
1966 {
1967 recipients_arg = i + 1;
1968 break;
1969 }
1970
1971 /* Handle flagged options */
1972
1973 switchchar = arg[1];
1974 argrest = arg+2;
1975
1976 /* Make all -ex options synonymous with -oex arguments, since that
1977 is assumed by various callers. Also make -qR options synonymous with -R
1978 options, as that seems to be required as well. Allow for -qqR too, and
1979 the same for -S options. */
1980
1981 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1982 Ustrncmp(arg+1, "qR", 2) == 0 ||
1983 Ustrncmp(arg+1, "qS", 2) == 0)
1984 {
1985 switchchar = arg[2];
1986 argrest++;
1987 }
1988 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1989 {
1990 switchchar = arg[3];
1991 argrest += 2;
1992 f.queue_2stage = TRUE;
1993 }
1994
1995 /* Make -r synonymous with -f, since it is a documented alias */
1996
1997 else if (arg[1] == 'r') switchchar = 'f';
1998
1999 /* Make -ov synonymous with -v */
2000
2001 else if (Ustrcmp(arg, "-ov") == 0)
2002 {
2003 switchchar = 'v';
2004 argrest++;
2005 }
2006
2007 /* deal with --option_aliases */
2008 else if (switchchar == '-')
2009 {
2010 if (Ustrcmp(argrest, "help") == 0)
2011 {
2012 usage_wanted = TRUE;
2013 break;
2014 }
2015 else if (Ustrcmp(argrest, "version") == 0)
2016 {
2017 switchchar = 'b';
2018 argrest = US"V";
2019 }
2020 }
2021
2022 /* High-level switch on active initial letter */
2023
2024 switch(switchchar)
2025 {
2026
2027 /* sendmail uses -Ac and -Am to control which .cf file is used;
2028 we ignore them. */
2029 case 'A':
2030 if (*argrest == '\0') { badarg = TRUE; break; }
2031 else
2032 {
2033 BOOL ignore = FALSE;
2034 switch (*argrest)
2035 {
2036 case 'c':
2037 case 'm':
2038 if (*(argrest + 1) == '\0')
2039 ignore = TRUE;
2040 break;
2041 }
2042 if (!ignore) badarg = TRUE;
2043 }
2044 break;
2045
2046 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2047 so has no need of it. */
2048
2049 case 'B':
2050 if (!*argrest) i++; /* Skip over the type */
2051 break;
2052
2053
2054 case 'b':
2055 {
2056 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2057
2058 switch (*argrest++)
2059 {
2060 /* -bd: Run in daemon mode, awaiting SMTP connections.
2061 -bdf: Ditto, but in the foreground.
2062 */
2063 case 'd':
2064 f.daemon_listen = TRUE;
2065 if (*argrest == 'f') f.background_daemon = FALSE;
2066 else if (*argrest) badarg = TRUE;
2067 break;
2068
2069 /* -be: Run in expansion test mode
2070 -bem: Ditto, but read a message from a file first
2071 */
2072 case 'e':
2073 expansion_test = checking = TRUE;
2074 if (*argrest == 'm')
2075 {
2076 if (++i >= argc) { badarg = TRUE; break; }
2077 expansion_test_message = argv[i];
2078 argrest++;
2079 }
2080 if (*argrest) badarg = TRUE;
2081 break;
2082
2083 /* -bF: Run system filter test */
2084 case 'F':
2085 filter_test |= checking = FTEST_SYSTEM;
2086 if (*argrest) { badarg = TRUE; break; }
2087 if (++i < argc) filter_test_sfile = argv[i]; else
2088 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2089 break;
2090
2091 /* -bf: Run user filter test
2092 -bfd: Set domain for filter testing
2093 -bfl: Set local part for filter testing
2094 -bfp: Set prefix for filter testing
2095 -bfs: Set suffix for filter testing
2096 */
2097 case 'f':
2098 if (!*argrest)
2099 {
2100 filter_test |= checking = FTEST_USER;
2101 if (++i < argc) filter_test_ufile = argv[i];
2102 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2103 }
2104 else
2105 {
2106 if (++i >= argc)
2107 exim_fail("exim: string expected after %s\n", arg);
2108 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2109 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2110 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2111 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2112 else badarg = TRUE;
2113 }
2114 break;
2115
2116 /* -bh: Host checking - an IP address must follow. */
2117 case 'h':
2118 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2119 {
2120 if (++i >= argc) { badarg = TRUE; break; }
2121 sender_host_address = argv[i];
2122 host_checking = checking = f.log_testing_mode = TRUE;
2123 f.host_checking_callout = *argrest == 'c';
2124 message_logs = FALSE;
2125 }
2126 else badarg = TRUE;
2127 break;
2128
2129 /* -bi: This option is used by sendmail to initialize *the* alias file,
2130 though it has the -oA option to specify a different file. Exim has no
2131 concept of *the* alias file, but since Sun's YP make script calls
2132 sendmail this way, some support must be provided. */
2133 case 'i':
2134 if (!*++argrest) bi_option = TRUE;
2135 else badarg = TRUE;
2136 break;
2137
2138 /* -bI: provide information, of the type to follow after a colon.
2139 This is an Exim flag. */
2140 case 'I':
2141 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2142 {
2143 uschar *p = argrest+1;
2144 info_flag = CMDINFO_HELP;
2145 if (Ustrlen(p))
2146 if (strcmpic(p, CUS"sieve") == 0)
2147 {
2148 info_flag = CMDINFO_SIEVE;
2149 info_stdout = TRUE;
2150 }
2151 else if (strcmpic(p, CUS"dscp") == 0)
2152 {
2153 info_flag = CMDINFO_DSCP;
2154 info_stdout = TRUE;
2155 }
2156 else if (strcmpic(p, CUS"help") == 0)
2157 info_stdout = TRUE;
2158 }
2159 else badarg = TRUE;
2160 break;
2161
2162 /* -bm: Accept and deliver message - the default option. Reinstate
2163 receiving_message, which got turned off for all -b options.
2164 -bmalware: test the filename given for malware */
2165 case 'm':
2166 if (!*argrest) receiving_message = TRUE;
2167 else if (Ustrcmp(argrest, "alware") == 0)
2168 {
2169 if (++i >= argc) { badarg = TRUE; break; }
2170 checking = TRUE;
2171 malware_test_file = argv[i];
2172 }
2173 else badarg = TRUE;
2174 break;
2175
2176 /* -bnq: For locally originating messages, do not qualify unqualified
2177 addresses. In the envelope, this causes errors; in header lines they
2178 just get left. */
2179 case 'n':
2180 if (Ustrcmp(argrest, "q") == 0)
2181 {
2182 f.allow_unqualified_sender = FALSE;
2183 f.allow_unqualified_recipient = FALSE;
2184 }
2185 else badarg = TRUE;
2186 break;
2187
2188 /* -bpxx: List the contents of the mail queue, in various forms. If
2189 the option is -bpc, just a queue count is needed. Otherwise, if the
2190 first letter after p is r, then order is random. */
2191 case 'p':
2192 if (*argrest == 'c')
2193 {
2194 count_queue = TRUE;
2195 if (*++argrest) badarg = TRUE;
2196 break;
2197 }
2198
2199 if (*argrest == 'r')
2200 {
2201 list_queue_option = 8;
2202 argrest++;
2203 }
2204 else list_queue_option = 0;
2205
2206 list_queue = TRUE;
2207
2208 /* -bp: List the contents of the mail queue, top-level only */
2209
2210 if (!*argrest) {}
2211
2212 /* -bpu: List the contents of the mail queue, top-level undelivered */
2213
2214 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2215
2216 /* -bpa: List the contents of the mail queue, including all delivered */
2217
2218 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2219
2220 /* Unknown after -bp[r] */
2221
2222 else badarg = TRUE;
2223 break;
2224
2225
2226 /* -bP: List the configuration variables given as the address list.
2227 Force -v, so configuration errors get displayed. */
2228 case 'P':
2229
2230 /* -bP config: we need to setup here, because later,
2231 * when list_options is checked, the config is read already */
2232 if (*argrest)
2233 badarg = TRUE;
2234 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2235 {
2236 list_config = TRUE;
2237 readconf_save_config(version_string);
2238 }
2239 else
2240 {
2241 list_options = TRUE;
2242 debug_selector |= D_v;
2243 debug_file = stderr;
2244 }
2245 break;
2246
2247 /* -brt: Test retry configuration lookup */
2248 case 'r':
2249 if (Ustrcmp(argrest, "t") == 0)
2250 {
2251 checking = TRUE;
2252 test_retry_arg = i + 1;
2253 goto END_ARG;
2254 }
2255
2256 /* -brw: Test rewrite configuration */
2257
2258 else if (Ustrcmp(argrest, "w") == 0)
2259 {
2260 checking = TRUE;
2261 test_rewrite_arg = i + 1;
2262 goto END_ARG;
2263 }
2264 else badarg = TRUE;
2265 break;
2266
2267 /* -bS: Read SMTP commands on standard input, but produce no replies -
2268 all errors are reported by sending messages. */
2269 case 'S':
2270 if (!*argrest)
2271 smtp_input = smtp_batched_input = receiving_message = TRUE;
2272 else badarg = TRUE;
2273 break;
2274
2275 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2276 on standard output. */
2277 case 's':
2278 if (!*argrest) smtp_input = receiving_message = TRUE;
2279 else badarg = TRUE;
2280 break;
2281
2282 /* -bt: address testing mode */
2283 case 't':
2284 if (!*argrest)
2285 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2286 else badarg = TRUE;
2287 break;
2288
2289 /* -bv: verify addresses */
2290 case 'v':
2291 if (!*argrest)
2292 verify_address_mode = checking = f.log_testing_mode = TRUE;
2293
2294 /* -bvs: verify sender addresses */
2295
2296 else if (Ustrcmp(argrest, "s") == 0)
2297 {
2298 verify_address_mode = checking = f.log_testing_mode = TRUE;
2299 verify_as_sender = TRUE;
2300 }
2301 else badarg = TRUE;
2302 break;
2303
2304 /* -bV: Print version string and support details */
2305 case 'V':
2306 if (!*argrest)
2307 {
2308 printf("Exim version %s #%s built %s\n", version_string,
2309 version_cnumber, version_date);
2310 printf("%s\n", CS version_copyright);
2311 version_printed = TRUE;
2312 show_whats_supported(stdout);
2313 f.log_testing_mode = TRUE;
2314 }
2315 else badarg = TRUE;
2316 break;
2317
2318 /* -bw: inetd wait mode, accept a listening socket as stdin */
2319 case 'w':
2320 f.inetd_wait_mode = TRUE;
2321 f.background_daemon = FALSE;
2322 f.daemon_listen = TRUE;
2323 if (*argrest)
2324 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2325 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2326 break;
2327
2328 default:
2329 badarg = TRUE;
2330 break;
2331 }
2332 break;
2333 }
2334
2335
2336 /* -C: change configuration file list; ignore if it isn't really
2337 a change! Enforce a prefix check if required. */
2338
2339 case 'C':
2340 if (*argrest == 0)
2341 {
2342 if(++i < argc) argrest = argv[i]; else
2343 { badarg = TRUE; break; }
2344 }
2345 if (Ustrcmp(config_main_filelist, argrest) != 0)
2346 {
2347 #ifdef ALT_CONFIG_PREFIX
2348 int sep = 0;
2349 int len = Ustrlen(ALT_CONFIG_PREFIX);
2350 const uschar *list = argrest;
2351 uschar *filename;
2352 while((filename = string_nextinlist(&list, &sep, big_buffer,
2353 big_buffer_size)) != NULL)
2354 {
2355 if ((Ustrlen(filename) < len ||
2356 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2357 Ustrstr(filename, "/../") != NULL) &&
2358 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2359 exim_fail("-C Permission denied\n");
2360 }
2361 #endif
2362 if (real_uid != root_uid)
2363 {
2364 #ifdef TRUSTED_CONFIG_LIST
2365
2366 if (real_uid != exim_uid
2367 #ifdef CONFIGURE_OWNER
2368 && real_uid != config_uid
2369 #endif
2370 )
2371 f.trusted_config = FALSE;
2372 else
2373 {
2374 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2375 if (trust_list)
2376 {
2377 struct stat statbuf;
2378
2379 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2380 (statbuf.st_uid != root_uid /* owner not root */
2381 #ifdef CONFIGURE_OWNER
2382 && statbuf.st_uid != config_uid /* owner not the special one */
2383 #endif
2384 ) || /* or */
2385 (statbuf.st_gid != root_gid /* group not root */
2386 #ifdef CONFIGURE_GROUP
2387 && statbuf.st_gid != config_gid /* group not the special one */
2388 #endif
2389 && (statbuf.st_mode & 020) != 0 /* group writeable */
2390 ) || /* or */
2391 (statbuf.st_mode & 2) != 0) /* world writeable */
2392 {
2393 f.trusted_config = FALSE;
2394 fclose(trust_list);
2395 }
2396 else
2397 {
2398 /* Well, the trust list at least is up to scratch... */
2399 rmark reset_point = store_mark();
2400 uschar *trusted_configs[32];
2401 int nr_configs = 0;
2402 int i = 0;
2403
2404 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2405 {
2406 uschar *start = big_buffer, *nl;
2407 while (*start && isspace(*start))
2408 start++;
2409 if (*start != '/')
2410 continue;
2411 nl = Ustrchr(start, '\n');
2412 if (nl)
2413 *nl = 0;
2414 trusted_configs[nr_configs++] = string_copy(start);
2415 if (nr_configs == 32)
2416 break;
2417 }
2418 fclose(trust_list);
2419
2420 if (nr_configs)
2421 {
2422 int sep = 0;
2423 const uschar *list = argrest;
2424 uschar *filename;
2425 while (f.trusted_config && (filename = string_nextinlist(&list,
2426 &sep, big_buffer, big_buffer_size)) != NULL)
2427 {
2428 for (i=0; i < nr_configs; i++)
2429 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2430 break;
2431 if (i == nr_configs)
2432 {
2433 f.trusted_config = FALSE;
2434 break;
2435 }
2436 }
2437 }
2438 else /* No valid prefixes found in trust_list file. */
2439 f.trusted_config = FALSE;
2440 store_reset(reset_point);
2441 }
2442 }
2443 else /* Could not open trust_list file. */
2444 f.trusted_config = FALSE;
2445 }
2446 #else
2447 /* Not root; don't trust config */
2448 f.trusted_config = FALSE;
2449 #endif
2450 }
2451
2452 config_main_filelist = argrest;
2453 f.config_changed = TRUE;
2454 }
2455 break;
2456
2457
2458 /* -D: set up a macro definition */
2459
2460 case 'D':
2461 #ifdef DISABLE_D_OPTION
2462 exim_fail("exim: -D is not available in this Exim binary\n");
2463 #else
2464 {
2465 int ptr = 0;
2466 macro_item *m;
2467 uschar name[24];
2468 uschar *s = argrest;
2469
2470 opt_D_used = TRUE;
2471 while (isspace(*s)) s++;
2472
2473 if (*s < 'A' || *s > 'Z')
2474 exim_fail("exim: macro name set by -D must start with "
2475 "an upper case letter\n");
2476
2477 while (isalnum(*s) || *s == '_')
2478 {
2479 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2480 s++;
2481 }
2482 name[ptr] = 0;
2483 if (ptr == 0) { badarg = TRUE; break; }
2484 while (isspace(*s)) s++;
2485 if (*s != 0)
2486 {
2487 if (*s++ != '=') { badarg = TRUE; break; }
2488 while (isspace(*s)) s++;
2489 }
2490
2491 for (m = macros_user; m; m = m->next)
2492 if (Ustrcmp(m->name, name) == 0)
2493 exim_fail("exim: duplicated -D in command line\n");
2494
2495 m = macro_create(name, s, TRUE);
2496
2497 if (clmacro_count >= MAX_CLMACROS)
2498 exim_fail("exim: too many -D options on command line\n");
2499 clmacros[clmacro_count++] =
2500 string_sprintf("-D%s=%s", m->name, m->replacement);
2501 }
2502 #endif
2503 break;
2504
2505 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2506 The latter is now a no-op, retained for compatibility only. If -dd is used,
2507 debugging subprocesses of the daemon is disabled. */
2508
2509 case 'd':
2510 if (Ustrcmp(argrest, "ropcr") == 0)
2511 {
2512 /* drop_cr = TRUE; */
2513 }
2514
2515 /* Use an intermediate variable so that we don't set debugging while
2516 decoding the debugging bits. */
2517
2518 else
2519 {
2520 unsigned int selector = D_default;
2521 debug_selector = 0;
2522 debug_file = NULL;
2523 if (*argrest == 'd')
2524 {
2525 f.debug_daemon = TRUE;
2526 argrest++;
2527 }
2528 if (*argrest != 0)
2529 decode_bits(&selector, 1, debug_notall, argrest,
2530 debug_options, debug_options_count, US"debug", 0);
2531 debug_selector = selector;
2532 }
2533 break;
2534
2535
2536 /* -E: This is a local error message. This option is not intended for
2537 external use at all, but is not restricted to trusted callers because it
2538 does no harm (just suppresses certain error messages) and if Exim is run
2539 not setuid root it won't always be trusted when it generates error
2540 messages using this option. If there is a message id following -E, point
2541 message_reference at it, for logging. */
2542
2543 case 'E':
2544 f.local_error_message = TRUE;
2545 if (mac_ismsgid(argrest)) message_reference = argrest;
2546 break;
2547
2548
2549 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2550 option, so it looks as if historically the -oex options are also callable
2551 without the leading -o. So we have to accept them. Before the switch,
2552 anything starting -oe has been converted to -e. Exim does not support all
2553 of the sendmail error options. */
2554
2555 case 'e':
2556 if (Ustrcmp(argrest, "e") == 0)
2557 {
2558 arg_error_handling = ERRORS_SENDER;
2559 errors_sender_rc = EXIT_SUCCESS;
2560 }
2561 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2562 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2563 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2564 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2565 else badarg = TRUE;
2566 break;
2567
2568
2569 /* -F: Set sender's full name, used instead of the gecos entry from
2570 the password file. Since users can usually alter their gecos entries,
2571 there's no security involved in using this instead. The data can follow
2572 the -F or be in the next argument. */
2573
2574 case 'F':
2575 if (*argrest == 0)
2576 {
2577 if(++i < argc) argrest = argv[i]; else
2578 { badarg = TRUE; break; }
2579 }
2580 originator_name = argrest;
2581 f.sender_name_forced = TRUE;
2582 break;
2583
2584
2585 /* -f: Set sender's address - this value is only actually used if Exim is
2586 run by a trusted user, or if untrusted_set_sender is set and matches the
2587 address, except that the null address can always be set by any user. The
2588 test for this happens later, when the value given here is ignored when not
2589 permitted. For an untrusted user, the actual sender is still put in Sender:
2590 if it doesn't match the From: header (unless no_local_from_check is set).
2591 The data can follow the -f or be in the next argument. The -r switch is an
2592 obsolete form of -f but since there appear to be programs out there that
2593 use anything that sendmail has ever supported, better accept it - the
2594 synonymizing is done before the switch above.
2595
2596 At this stage, we must allow domain literal addresses, because we don't
2597 know what the setting of allow_domain_literals is yet. Ditto for trailing
2598 dots and strip_trailing_dot. */
2599
2600 case 'f':
2601 {
2602 int dummy_start, dummy_end;
2603 uschar *errmess;
2604 if (*argrest == 0)
2605 {
2606 if (i+1 < argc) argrest = argv[++i]; else
2607 { badarg = TRUE; break; }
2608 }
2609 if (*argrest == 0)
2610 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2611 else
2612 {
2613 uschar *temp = argrest + Ustrlen(argrest) - 1;
2614 while (temp >= argrest && isspace(*temp)) temp--;
2615 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2616 allow_domain_literals = TRUE;
2617 strip_trailing_dot = TRUE;
2618 #ifdef SUPPORT_I18N
2619 allow_utf8_domains = TRUE;
2620 #endif
2621 sender_address = parse_extract_address(argrest, &errmess,
2622 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2623 sender_address = string_copy_taint(sender_address, TRUE);
2624 #ifdef SUPPORT_I18N
2625 message_smtputf8 = string_is_utf8(sender_address);
2626 allow_utf8_domains = FALSE;
2627 #endif
2628 allow_domain_literals = FALSE;
2629 strip_trailing_dot = FALSE;
2630 if (!sender_address)
2631 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2632 }
2633 f.sender_address_forced = TRUE;
2634 }
2635 break;
2636
2637 /* -G: sendmail invocation to specify that it's a gateway submission and
2638 sendmail may complain about problems instead of fixing them.
2639 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2640 not at this time complain about problems. */
2641
2642 case 'G':
2643 flag_G = TRUE;
2644 break;
2645
2646 /* -h: Set the hop count for an incoming message. Exim does not currently
2647 support this; it always computes it by counting the Received: headers.
2648 To put it in will require a change to the spool header file format. */
2649
2650 case 'h':
2651 if (*argrest == 0)
2652 {
2653 if(++i < argc) argrest = argv[i]; else
2654 { badarg = TRUE; break; }
2655 }
2656 if (!isdigit(*argrest)) badarg = TRUE;
2657 break;
2658
2659
2660 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2661 not to be documented for sendmail but mailx (at least) uses it) */
2662
2663 case 'i':
2664 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
2665 break;
2666
2667
2668 /* -L: set the identifier used for syslog; equivalent to setting
2669 syslog_processname in the config file, but needs to be an admin option. */
2670
2671 case 'L':
2672 if (*argrest == '\0')
2673 {
2674 if(++i < argc) argrest = argv[i]; else
2675 { badarg = TRUE; break; }
2676 }
2677 if ((sz = Ustrlen(argrest)) > 32)
2678 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2679 if (sz < 1)
2680 exim_fail("exim: the -L syslog name is too short\n");
2681 cmdline_syslog_name = argrest;
2682 break;
2683
2684 case 'M':
2685 receiving_message = FALSE;
2686
2687 /* -MC: continue delivery of another message via an existing open
2688 file descriptor. This option is used for an internal call by the
2689 smtp transport when there is a pending message waiting to go to an
2690 address to which it has got a connection. Five subsequent arguments are
2691 required: transport name, host name, IP address, sequence number, and
2692 message_id. Transports may decline to create new processes if the sequence
2693 number gets too big. The channel is stdin. This (-MC) must be the last
2694 argument. There's a subsequent check that the real-uid is privileged.
2695
2696 If we are running in the test harness. delay for a bit, to let the process
2697 that set this one up complete. This makes for repeatability of the logging,
2698 etc. output. */
2699
2700 if (Ustrcmp(argrest, "C") == 0)
2701 {
2702 union sockaddr_46 interface_sock;
2703 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2704
2705 if (argc != i + 6)
2706 exim_fail("exim: too many or too few arguments after -MC\n");
2707
2708 if (msg_action_arg >= 0)
2709 exim_fail("exim: incompatible arguments\n");
2710
2711 continue_transport = argv[++i];
2712 continue_hostname = argv[++i];
2713 continue_host_address = argv[++i];
2714 continue_sequence = Uatoi(argv[++i]);
2715 msg_action = MSG_DELIVER;
2716 msg_action_arg = ++i;
2717 forced_delivery = TRUE;
2718 queue_run_pid = passed_qr_pid;
2719 queue_run_pipe = passed_qr_pipe;
2720
2721 if (!mac_ismsgid(argv[i]))
2722 exim_fail("exim: malformed message id %s after -MC option\n",
2723 argv[i]);
2724
2725 /* Set up $sending_ip_address and $sending_port, unless proxied */
2726
2727 if (!continue_proxy_cipher)
2728 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2729 &size) == 0)
2730 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2731 &sending_port);
2732 else
2733 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2734 strerror(errno));
2735
2736 testharness_pause_ms(500);
2737 break;
2738 }
2739
2740 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2741 {
2742 switch(argrest[1])
2743 {
2744 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2745 precedes -MC (see above). The flag indicates that the host to which
2746 Exim is connected has accepted an AUTH sequence. */
2747
2748 case 'A': f.smtp_authenticated = TRUE; break;
2749
2750 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2751 that exim is connected to supports the esmtp extension DSN */
2752
2753 case 'D': smtp_peer_options |= OPTION_DSN; break;
2754
2755 /* -MCG: set the queue name, to a non-default value */
2756
2757 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2758 else badarg = TRUE;
2759 break;
2760
2761 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2762
2763 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2764
2765 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2766 it preceded -MC (see above) */
2767
2768 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2769
2770 /* -MCQ: pass on the pid of the queue-running process that started
2771 this chain of deliveries and the fd of its synchronizing pipe; this
2772 is useful only when it precedes -MC (see above) */
2773
2774 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2775 else badarg = TRUE;
2776 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2777 else badarg = TRUE;
2778 break;
2779
2780 /* -MCS: set the smtp_use_size flag; this is useful only when it
2781 precedes -MC (see above) */
2782
2783 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2784
2785 #ifndef DISABLE_TLS
2786 /* -MCt: similar to -MCT below but the connection is still open
2787 via a proxy process which handles the TLS context and coding.
2788 Require three arguments for the proxied local address and port,
2789 and the TLS cipher. */
2790
2791 case 't': if (++i < argc) sending_ip_address = argv[i];
2792 else badarg = TRUE;
2793 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2794 else badarg = TRUE;
2795 if (++i < argc) continue_proxy_cipher = argv[i];
2796 else badarg = TRUE;
2797 /*FALLTHROUGH*/
2798
2799 /* -MCT: set the tls_offered flag; this is useful only when it
2800 precedes -MC (see above). The flag indicates that the host to which
2801 Exim is connected has offered TLS support. */
2802
2803 case 'T': smtp_peer_options |= OPTION_TLS; break;
2804 #endif
2805
2806 default: badarg = TRUE; break;
2807 }
2808 break;
2809 }
2810
2811 /* -M[x]: various operations on the following list of message ids:
2812 -M deliver the messages, ignoring next retry times and thawing
2813 -Mc deliver the messages, checking next retry times, no thawing
2814 -Mf freeze the messages
2815 -Mg give up on the messages
2816 -Mt thaw the messages
2817 -Mrm remove the messages
2818 In the above cases, this must be the last option. There are also the
2819 following options which are followed by a single message id, and which
2820 act on that message. Some of them use the "recipient" addresses as well.
2821 -Mar add recipient(s)
2822 -Mmad mark all recipients delivered
2823 -Mmd mark recipients(s) delivered
2824 -Mes edit sender
2825 -Mset load a message for use with -be
2826 -Mvb show body
2827 -Mvc show copy (of whole message, in RFC 2822 format)
2828 -Mvh show header
2829 -Mvl show log
2830 */
2831
2832 else if (*argrest == 0)
2833 {
2834 msg_action = MSG_DELIVER;
2835 forced_delivery = f.deliver_force_thaw = TRUE;
2836 }
2837 else if (Ustrcmp(argrest, "ar") == 0)
2838 {
2839 msg_action = MSG_ADD_RECIPIENT;
2840 one_msg_action = TRUE;
2841 }
2842 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2843 else if (Ustrcmp(argrest, "es") == 0)
2844 {
2845 msg_action = MSG_EDIT_SENDER;
2846 one_msg_action = TRUE;
2847 }
2848 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2849 else if (Ustrcmp(argrest, "g") == 0)
2850 {
2851 msg_action = MSG_DELIVER;
2852 deliver_give_up = TRUE;
2853 }
2854 else if (Ustrcmp(argrest, "G") == 0)
2855 {
2856 msg_action = MSG_SETQUEUE;
2857 queue_name_dest = argv[++i];
2858 }
2859 else if (Ustrcmp(argrest, "mad") == 0)
2860 {
2861 msg_action = MSG_MARK_ALL_DELIVERED;
2862 }
2863 else if (Ustrcmp(argrest, "md") == 0)
2864 {
2865 msg_action = MSG_MARK_DELIVERED;
2866 one_msg_action = TRUE;
2867 }
2868 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2869 else if (Ustrcmp(argrest, "set") == 0)
2870 {
2871 msg_action = MSG_LOAD;
2872 one_msg_action = TRUE;
2873 }
2874 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2875 else if (Ustrcmp(argrest, "vb") == 0)
2876 {
2877 msg_action = MSG_SHOW_BODY;
2878 one_msg_action = TRUE;
2879 }
2880 else if (Ustrcmp(argrest, "vc") == 0)
2881 {
2882 msg_action = MSG_SHOW_COPY;
2883 one_msg_action = TRUE;
2884 }
2885 else if (Ustrcmp(argrest, "vh") == 0)
2886 {
2887 msg_action = MSG_SHOW_HEADER;
2888 one_msg_action = TRUE;
2889 }
2890 else if (Ustrcmp(argrest, "vl") == 0)
2891 {
2892 msg_action = MSG_SHOW_LOG;
2893 one_msg_action = TRUE;
2894 }
2895 else { badarg = TRUE; break; }
2896
2897 /* All the -Mxx options require at least one message id. */
2898
2899 msg_action_arg = i + 1;
2900 if (msg_action_arg >= argc)
2901 exim_fail("exim: no message ids given after %s option\n", arg);
2902
2903 /* Some require only message ids to follow */
2904
2905 if (!one_msg_action)
2906 {
2907 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2908 exim_fail("exim: malformed message id %s after %s option\n",
2909 argv[j], arg);
2910 goto END_ARG; /* Remaining args are ids */
2911 }
2912
2913 /* Others require only one message id, possibly followed by addresses,
2914 which will be handled as normal arguments. */
2915
2916 else
2917 {
2918 if (!mac_ismsgid(argv[msg_action_arg]))
2919 exim_fail("exim: malformed message id %s after %s option\n",
2920 argv[msg_action_arg], arg);
2921 i++;
2922 }
2923 break;
2924
2925
2926 /* Some programs seem to call the -om option without the leading o;
2927 for sendmail it askes for "me too". Exim always does this. */
2928
2929 case 'm':
2930 if (*argrest != 0) badarg = TRUE;
2931 break;
2932
2933
2934 /* -N: don't do delivery - a debugging option that stops transports doing
2935 their thing. It implies debugging at the D_v level. */
2936
2937 case 'N':
2938 if (*argrest == 0)
2939 {
2940 f.dont_deliver = TRUE;
2941 debug_selector |= D_v;
2942 debug_file = stderr;
2943 }
2944 else badarg = TRUE;
2945 break;
2946
2947
2948 /* -n: This means "don't alias" in sendmail, apparently.
2949 For normal invocations, it has no effect.
2950 It may affect some other options. */
2951
2952 case 'n':
2953 flag_n = TRUE;
2954 break;
2955
2956 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2957 option to the specified value. This form uses long names. We need to handle
2958 -O option=value and -Ooption=value. */
2959
2960 case 'O':
2961 if (*argrest == 0)
2962 if (++i >= argc)
2963 exim_fail("exim: string expected after -O\n");
2964 break;
2965
2966 case 'o':
2967 switch (*argrest++)
2968 {
2969 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2970 file" option). */
2971 case 'A':
2972 if (!*(alias_arg = argrest))
2973 if (i+1 < argc) alias_arg = argv[++i];
2974 else exim_fail("exim: string expected after -oA\n");
2975 break;
2976
2977 /* -oB: Set a connection message max value for remote deliveries */
2978 case 'B':
2979 {
2980 uschar * p = argrest;
2981 if (!*p)
2982 if (i+1 < argc && isdigit((argv[i+1][0])))
2983 p = argv[++i];
2984 else
2985 {
2986 connection_max_messages = 1;
2987 p = NULL;
2988 }
2989
2990 if (p)
2991 {
2992 if (!isdigit(*p))
2993 exim_fail("exim: number expected after -oB\n");
2994 connection_max_messages = Uatoi(p);
2995 }
2996 }
2997 break;
2998
2999 /* -odb: background delivery */
3000
3001 case 'd':
3002 if (Ustrcmp(argrest, "b") == 0)
3003 {
3004 f.synchronous_delivery = FALSE;
3005 arg_queue_only = FALSE;
3006 queue_only_set = TRUE;
3007 }
3008
3009 /* -odf: foreground delivery (smail-compatible option); same effect as
3010 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3011 */
3012
3013 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3014 {
3015 f.synchronous_delivery = TRUE;
3016 arg_queue_only = FALSE;
3017 queue_only_set = TRUE;
3018 }
3019
3020 /* -odq: queue only */
3021
3022 else if (Ustrcmp(argrest, "q") == 0)
3023 {
3024 f.synchronous_delivery = FALSE;
3025 arg_queue_only = TRUE;
3026 queue_only_set = TRUE;
3027 }
3028
3029 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3030 but no remote delivery */
3031
3032 else if (Ustrcmp(argrest, "qs") == 0)
3033 {
3034 f.queue_smtp = TRUE;
3035 arg_queue_only = FALSE;
3036 queue_only_set = TRUE;
3037 }
3038 else badarg = TRUE;
3039 break;
3040
3041 /* -oex: Sendmail error flags. As these are also accepted without the
3042 leading -o prefix, for compatibility with vacation and other callers,
3043 they are handled with -e above. */
3044
3045 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3046 -oitrue: Another sendmail syntax for the same */
3047
3048 case 'i':
3049 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3050 f.dot_ends = FALSE;
3051 else badarg = TRUE;
3052 break;
3053
3054 /* -oM*: Set various characteristics for an incoming message; actually
3055 acted on for trusted callers only. */
3056
3057 case 'M':
3058 {
3059 if (i+1 >= argc)
3060 exim_fail("exim: data expected after -oM%s\n", argrest);
3061
3062 /* -oMa: Set sender host address */
3063
3064 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
3065
3066 /* -oMaa: Set authenticator name */
3067
3068 else if (Ustrcmp(argrest, "aa") == 0)
3069 sender_host_authenticated = argv[++i];
3070
3071 /* -oMas: setting authenticated sender */
3072
3073 else if (Ustrcmp(argrest, "as") == 0)
3074 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3075
3076 /* -oMai: setting authenticated id */
3077
3078 else if (Ustrcmp(argrest, "ai") == 0)
3079 authenticated_id = string_copy_taint(argv[++i], TRUE);
3080
3081 /* -oMi: Set incoming interface address */
3082
3083 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
3084
3085 /* -oMm: Message reference */
3086
3087 else if (Ustrcmp(argrest, "m") == 0)
3088 {
3089 if (!mac_ismsgid(argv[i+1]))
3090 exim_fail("-oMm must be a valid message ID\n");
3091 if (!f.trusted_config)
3092 exim_fail("-oMm must be called by a trusted user/config\n");
3093 message_reference = argv[++i];
3094 }
3095
3096 /* -oMr: Received protocol */
3097
3098 else if (Ustrcmp(argrest, "r") == 0)
3099
3100 if (received_protocol)
3101 exim_fail("received_protocol is set already\n");
3102 else
3103 received_protocol = argv[++i];
3104
3105 /* -oMs: Set sender host name */
3106
3107 else if (Ustrcmp(argrest, "s") == 0)
3108 sender_host_name = string_copy_taint(argv[++i], TRUE);
3109
3110 /* -oMt: Set sender ident */
3111
3112 else if (Ustrcmp(argrest, "t") == 0)
3113 {
3114 sender_ident_set = TRUE;
3115 sender_ident = argv[++i];
3116 }
3117
3118 /* Else a bad argument */
3119
3120 else
3121 badarg = TRUE;
3122 }
3123 break;
3124
3125 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3126 seem to call this as -m (undocumented), so that is also accepted (see
3127 above). */
3128 /* -oo: An ancient flag for old-style addresses which still seems to
3129 crop up in some calls (see in SCO). */
3130
3131 case 'm':
3132 case 'o':
3133 if (!*argrest) {}
3134 else badarg = TRUE;
3135 break;
3136
3137 /* -oP <name>: set pid file path for daemon
3138 -oPX: delete pid file of daemon */
3139
3140 case 'P':
3141 if (!*argrest) override_pid_file_path = argv[++i];
3142 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3143 else badarg = TRUE;
3144 break;
3145
3146
3147 /* -or <n>: set timeout for non-SMTP acceptance
3148 -os <n>: set timeout for SMTP acceptance */
3149
3150 case 'r':
3151 case 's':
3152 if (!*argrest)
3153 {
3154 int *tp = (*argrest == 'r')?
3155 &arg_receive_timeout : &arg_smtp_receive_timeout;
3156 if (argrest[1] == 0)
3157 {
3158 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3159 }
3160 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3161 if (*tp < 0)
3162 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3163 }
3164 else badarg = TRUE;
3165 break;
3166
3167 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3168
3169 case 'X':
3170 if (!*argrest)
3171 override_local_interfaces = argv[++i];
3172 else badarg = TRUE;
3173 break;
3174
3175 /* Unknown -o argument */
3176
3177 default:
3178 badarg = TRUE;
3179 }
3180 break;
3181
3182
3183 /* -ps: force Perl startup; -pd force delayed Perl startup */
3184
3185 case 'p':
3186 #ifdef EXIM_PERL
3187 if (*argrest == 's' && argrest[1] == 0)
3188 {
3189 perl_start_option = 1;
3190 break;
3191 }
3192 if (*argrest == 'd' && argrest[1] == 0)
3193 {
3194 perl_start_option = -1;
3195 break;
3196 }
3197 #endif
3198
3199 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3200 which sets the host protocol and host name */
3201
3202 if (*argrest == 0)
3203 if (i+1 < argc)
3204 argrest = argv[++i];
3205 else
3206 { badarg = TRUE; break; }
3207
3208 if (*argrest != 0)
3209 {
3210 uschar *hn;
3211
3212 if (received_protocol)
3213 exim_fail("received_protocol is set already\n");
3214
3215 hn = Ustrchr(argrest, ':');
3216 if (hn == NULL)
3217 received_protocol = argrest;
3218 else
3219 {
3220 int old_pool = store_pool;
3221 store_pool = POOL_PERM;
3222 received_protocol = string_copyn(argrest, hn - argrest);
3223 store_pool = old_pool;
3224 sender_host_name = hn + 1;
3225 }
3226 }
3227 break;
3228
3229
3230 case 'q':
3231 receiving_message = FALSE;
3232 if (queue_interval >= 0)
3233 exim_fail("exim: -q specified more than once\n");
3234
3235 /* -qq...: Do queue runs in a 2-stage manner */
3236
3237 if (*argrest == 'q')
3238 {
3239 f.queue_2stage = TRUE;
3240 argrest++;
3241 }
3242
3243 /* -qi...: Do only first (initial) deliveries */
3244
3245 if (*argrest == 'i')
3246 {
3247 f.queue_run_first_delivery = TRUE;
3248 argrest++;
3249 }
3250
3251 /* -qf...: Run the queue, forcing deliveries
3252 -qff..: Ditto, forcing thawing as well */
3253
3254 if (*argrest == 'f')
3255 {
3256 f.queue_run_force = TRUE;
3257 if (*++argrest == 'f')
3258 {
3259 f.deliver_force_thaw = TRUE;
3260 argrest++;
3261 }
3262 }
3263
3264 /* -q[f][f]l...: Run the queue only on local deliveries */
3265
3266 if (*argrest == 'l')
3267 {
3268 f.queue_run_local = TRUE;
3269 argrest++;
3270 }
3271
3272 /* -q[f][f][l][G<name>]... Work on the named queue */
3273
3274 if (*argrest == 'G')
3275 {
3276 int i;
3277 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3278 queue_name = string_copyn(argrest, i);
3279 argrest += i;
3280 if (*argrest == '/') argrest++;
3281 }
3282
3283 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3284 only, optionally named, optionally starting from a given message id. */
3285
3286 if (!(list_queue || count_queue))
3287 if (*argrest == 0
3288 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3289 {
3290 queue_interval = 0;
3291 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3292 start_queue_run_id = argv[++i];
3293 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3294 stop_queue_run_id = argv[++i];
3295 }
3296
3297 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3298 forced, optionally local only, optionally named. */
3299
3300 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3301 0, FALSE)) <= 0)
3302 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3303 break;
3304
3305
3306 case 'R': /* Synonymous with -qR... */
3307 receiving_message = FALSE;
3308
3309 /* -Rf: As -R (below) but force all deliveries,
3310 -Rff: Ditto, but also thaw all frozen messages,
3311 -Rr: String is regex
3312 -Rrf: Regex and force
3313 -Rrff: Regex and force and thaw
3314
3315 in all cases provided there are no further characters in this
3316 argument. */
3317
3318 if (*argrest != 0)
3319 for (int i = 0; i < nelem(rsopts); i++)
3320 if (Ustrcmp(argrest, rsopts[i]) == 0)
3321 {
3322 if (i != 2) f.queue_run_force = TRUE;
3323 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3324 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3325 argrest += Ustrlen(rsopts[i]);
3326 }
3327
3328 /* -R: Set string to match in addresses for forced queue run to
3329 pick out particular messages. */
3330
3331 if (*argrest)
3332 deliver_selectstring = argrest;
3333 else if (i+1 < argc)
3334 deliver_selectstring = argv[++i];
3335 else
3336 exim_fail("exim: string expected after -R\n");
3337 break;
3338
3339
3340 /* -r: an obsolete synonym for -f (see above) */
3341
3342
3343 /* -S: Like -R but works on sender. */
3344
3345 case 'S': /* Synonymous with -qS... */
3346 receiving_message = FALSE;
3347
3348 /* -Sf: As -S (below) but force all deliveries,
3349 -Sff: Ditto, but also thaw all frozen messages,
3350 -Sr: String is regex
3351 -Srf: Regex and force
3352 -Srff: Regex and force and thaw
3353
3354 in all cases provided there are no further characters in this
3355 argument. */
3356
3357 if (*argrest)
3358 for (int i = 0; i < nelem(rsopts); i++)
3359 if (Ustrcmp(argrest, rsopts[i]) == 0)
3360 {
3361 if (i != 2) f.queue_run_force = TRUE;
3362 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3363 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3364 argrest += Ustrlen(rsopts[i]);
3365 }
3366
3367 /* -S: Set string to match in addresses for forced queue run to
3368 pick out particular messages. */
3369
3370 if (*argrest)
3371 deliver_selectstring_sender = argrest;
3372 else if (i+1 < argc)
3373 deliver_selectstring_sender = argv[++i];
3374 else
3375 exim_fail("exim: string expected after -S\n");
3376 break;
3377
3378 /* -Tqt is an option that is exclusively for use by the testing suite.
3379 It is not recognized in other circumstances. It allows for the setting up
3380 of explicit "queue times" so that various warning/retry things can be
3381 tested. Otherwise variability of clock ticks etc. cause problems. */
3382
3383 case 'T':
3384 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3385 fudged_queue_times = argv[++i];
3386 else badarg = TRUE;
3387 break;
3388
3389
3390 /* -t: Set flag to extract recipients from body of message. */
3391
3392 case 't':
3393 if (*argrest == 0) extract_recipients = TRUE;
3394
3395 /* -ti: Set flag to extract recipients from body of message, and also
3396 specify that dot does not end the message. */
3397
3398 else if (Ustrcmp(argrest, "i") == 0)
3399 {
3400 extract_recipients = TRUE;
3401 f.dot_ends = FALSE;
3402 }
3403
3404 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3405
3406 #ifndef DISABLE_TLS
3407 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3408 #endif
3409
3410 else badarg = TRUE;
3411 break;
3412
3413
3414 /* -U: This means "initial user submission" in sendmail, apparently. The
3415 doc claims that in future sendmail may refuse syntactically invalid
3416 messages instead of fixing them. For the moment, we just ignore it. */
3417
3418 case 'U':
3419 break;
3420
3421
3422 /* -v: verify things - this is a very low-level debugging */
3423
3424 case 'v':
3425 if (*argrest == 0)
3426 {
3427 debug_selector |= D_v;
3428 debug_file = stderr;
3429 }
3430 else badarg = TRUE;
3431 break;
3432
3433
3434 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3435
3436 The -x flag tells the sendmail command that mail from a local
3437 mail program has National Language Support (NLS) extended characters
3438 in the body of the mail item. The sendmail command can send mail with
3439 extended NLS characters across networks that normally corrupts these
3440 8-bit characters.
3441
3442 As Exim is 8-bit clean, it just ignores this flag. */
3443
3444 case 'x':
3445 if (*argrest != 0) badarg = TRUE;
3446 break;
3447
3448 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3449 logs to that file. We swallow the parameter and otherwise ignore it. */
3450
3451 case 'X':
3452 if (*argrest == '\0')
3453 if (++i >= argc)
3454 exim_fail("exim: string expected after -X\n");
3455 break;
3456
3457 case 'z':
3458 if (*argrest == '\0')
3459 if (++i < argc)
3460 log_oneline = argv[i];
3461 else
3462 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3463 break;
3464
3465 /* All other initial characters are errors */
3466
3467 default:
3468 badarg = TRUE;
3469 break;
3470 } /* End of high-level switch statement */
3471
3472 /* Failed to recognize the option, or syntax error */
3473
3474 if (badarg)
3475 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3476 "option %s\n", arg);
3477 }
3478
3479
3480 /* If -R or -S have been specified without -q, assume a single queue run. */
3481
3482 if ( (deliver_selectstring || deliver_selectstring_sender)
3483 && queue_interval < 0)
3484 queue_interval = 0;
3485
3486
3487 END_ARG:
3488 /* If usage_wanted is set we call the usage function - which never returns */
3489 if (usage_wanted) exim_usage(called_as);
3490
3491 /* Arguments have been processed. Check for incompatibilities. */
3492 if ((
3493 (smtp_input || extract_recipients || recipients_arg < argc) &&
3494 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3495 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3496 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3497 ) ||
3498 (
3499 msg_action_arg > 0 &&
3500 (f.daemon_listen || queue_interval > 0 || list_options ||
3501 (checking && msg_action != MSG_LOAD) ||
3502 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3503 ) ||
3504 (
3505 (f.daemon_listen || queue_interval > 0) &&
3506 (sender_address != NULL || list_options || list_queue || checking ||
3507 bi_option)
3508 ) ||
3509 (
3510 f.daemon_listen && queue_interval == 0
3511 ) ||
3512 (
3513 f.inetd_wait_mode && queue_interval >= 0