Fix parsing of cmdline -os & -pr options. Bug 2538
[exim.git] / src / src / exim.c
CommitLineData
059ec3d9
PH
1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
f9ba5e22 5/* Copyright (c) University of Cambridge 1995 - 2018 */
059ec3d9
PH
6/* See the file NOTICE for conditions of use and distribution. */
7
8
9/* The main function: entry point, initialization, and high-level control.
10Also a few functions that don't naturally fit elsewhere. */
11
12
13#include "exim.h"
14
98913c8e 15#if defined(__GLIBC__) && !defined(__UCLIBC__)
01f3091a
JH
16# include <gnu/libc-version.h>
17#endif
18
f797c123
JH
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
12815ef0
JH
26#ifndef _TIME_H
27# include <time.h>
28#endif
29
6545de78
PP
30extern void init_lookup_list(void);
31
059ec3d9
PH
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
39for store allocation via Exim's store manager. The normal calls are actually
40macros that pass over location information to make tracing easier. These
41functions just interface to the standard macro calls. A good compiler will
42optimize out the tail recursion and so not make them too expensive. There
43are two sets of functions; one for use when we want to retain the compiled
44regular expression for a long time; the other for short-term use. */
45
46static void *
47function_store_get(size_t size)
48{
f3ebb786
JH
49/* For now, regard all RE results as potentially tainted. We might need
50more intelligence on this point. */
51return store_get((int)size, TRUE);
059ec3d9
PH
52}
53
54static void
55function_dummy_free(void *block) { block = block; }
56
57static void *
58function_store_malloc(size_t size)
59{
60return store_malloc((int)size);
61}
62
63static void
64function_store_free(void *block)
65{
66store_free(block);
67}
68
69
70
71
72/*************************************************
98a90c36
PP
73* Enums for cmdline interface *
74*************************************************/
75
76enum commandline_info { CMDINFO_NONE=0,
36a3ae5f 77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
98a90c36
PP
78
79
80
81
82/*************************************************
059ec3d9
PH
83* Compile regular expression and panic on fail *
84*************************************************/
85
86/* This function is called when failure to compile a regular expression leads
87to a panic exit. In other cases, pcre_compile() is called directly. In many
88cases where this function is used, the results of the compilation are to be
89placed in long-lived store, so we temporarily reset the store management
90functions that PCRE uses if the use_malloc flag is set.
91
92Argument:
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
96
97Returns: pointer to the compiled pattern
98*/
99
100const pcre *
476be7e2 101regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
059ec3d9
PH
102{
103int offset;
104int options = PCRE_COPT;
105const pcre *yield;
106const uschar *error;
107if (use_malloc)
108 {
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
111 }
112if (caseless) options |= PCRE_CASELESS;
3d2e82c5 113yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
059ec3d9
PH
114pcre_malloc = function_store_get;
115pcre_free = function_dummy_free;
116if (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);
119return 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
130the matched substrings.
131
132Arguments:
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
140Returns: TRUE or FALSE
141*/
142
143BOOL
1dc92d5a 144regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
059ec3d9
PH
145{
146int ovector[3*(EXPAND_MAXN+1)];
1dc92d5a
JH
147uschar * s = string_copy(subject); /* de-constifying */
148int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
ee8b8090 149 PCRE_EOPT | options, ovector, nelem(ovector));
059ec3d9
PH
150BOOL yield = n >= 0;
151if (n == 0) n = EXPAND_MAXN + 1;
152if (yield)
153 {
ee8b8090 154 expand_nmax = setup < 0 ? 0 : setup + 1;
d7978c0f 155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
059ec3d9 156 {
1dc92d5a 157 expand_nstring[expand_nmax] = s + ovector[nn];
059ec3d9
PH
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
159 }
160 expand_nmax--;
161 }
162return yield;
163}
164
165
166
167
168/*************************************************
921b12ca
TF
169* Set up processing details *
170*************************************************/
171
172/* Save a text string for dumping when SIGUSR1 is received.
173Do checks for overruns.
174
175Arguments: format and arguments, as for printf()
176Returns: nothing
177*/
178
179void
180set_process_info(const char *format, ...)
181{
d12746bc
JH
182gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
183gstring * g;
184int len;
921b12ca 185va_list ap;
d12746bc
JH
186
187g = string_fmt_append(&gs, "%5d ", (int)getpid());
188len = g->ptr;
921b12ca 189va_start(ap, format);
f3ebb786 190if (!string_vformat(g, 0, format, ap))
d12746bc
JH
191 {
192 gs.ptr = len;
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
194 }
195g = string_catn(g, US"\n", 1);
196string_from_gstring(g);
197process_info_len = g->ptr;
921b12ca
TF
198DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
199va_end(ap);
200}
201
830832c9
HSHR
202/***********************************************
203* Handler for SIGTERM *
204***********************************************/
921b12ca 205
830832c9
HSHR
206static void
207term_handler(int sig)
208{
01446a56 209exit(1);
830832c9 210}
921b12ca
TF
211
212
213/*************************************************
059ec3d9
PH
214* Handler for SIGUSR1 *
215*************************************************/
216
217/* SIGUSR1 causes any exim process to write to the process log details of
218what it is currently doing. It will only be used if the OS is capable of
219setting up a handler that causes automatic restarting of any system call
220that is in progress at the time.
221
921b12ca
TF
222This function takes care to be signal-safe.
223
059ec3d9
PH
224Argument: the signal number (SIGUSR1)
225Returns: nothing
226*/
227
228static void
229usr1_handler(int sig)
230{
921b12ca
TF
231int fd;
232
233os_restarting_signal(sig, usr1_handler);
234
cab0c277 235if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
921b12ca
TF
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,
249give up. There is not much useful we can do with errors, since we don't want
250to disrupt whatever is going on outside the signal handler. */
251
252if (fd < 0) return;
253
2f21487f 254(void)write(fd, process_info, process_info_len);
921b12ca 255(void)close(fd);
059ec3d9
PH
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
265doesn't actually get used unless alarm() has been called to set a timer, to
266place a time limit on a system call of some kind. When the handler is run, it
267re-enables itself.
268
269There are some other SIGALRM handlers that are used in special cases when more
270than just a flag setting is required; for example, when reading a message's
271input. These are normally set up in the code module that uses them, and the
272SIGALRM handler is reset to this one afterwards.
273
274Argument: the signal value (SIGALRM)
275Returns: nothing
276*/
277
278void
279sigalrm_handler(int sig)
280{
281sig = sig; /* Keep picky compilers happy */
282sigalrm_seen = TRUE;
283os_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
293period of time that may include a fraction of a second. The coding is somewhat
eb2c0248
PH
294tedious. We do not expect setitimer() ever to fail, but if it does, the process
295will wait for ever, so we panic in this instance. (There was a case of this
296when a bug in a function that calls milliwait() caused it to pass invalid data.
7086e875 297That's when I added the check. :-)
059ec3d9 298
6906c131 299We assume it to be not worth sleeping for under 50us; this value will
0f8ba377
JH
300require revisiting as hardware advances. This avoids the issue of
301a zero-valued timer setting meaning "never fire".
302
059ec3d9
PH
303Argument: an itimerval structure containing the interval
304Returns: nothing
305*/
306
307static void
308milliwait(struct itimerval *itval)
309{
310sigset_t sigmask;
311sigset_t old_sigmask;
0f8ba377 312
6906c131 313if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
0f8ba377 314 return;
059ec3d9
PH
315(void)sigemptyset(&sigmask); /* Empty mask */
316(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 318if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
eb2c0248
PH
319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
059ec3d9
PH
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
335in some cases - for example, when using an increasing delay to slow down
336spammers.
337
338Argument: number of millseconds
339Returns: nothing
340*/
341
342void
343millisleep(int msec)
344{
345struct itimerval itval;
346itval.it_interval.tv_sec = 0;
347itval.it_interval.tv_usec = 0;
348itval.it_value.tv_sec = msec/1000;
349itval.it_value.tv_usec = (msec % 1000) * 1000;
350milliwait(&itval);
351}
352
353
354
355/*************************************************
356* Compare microsecond times *
357*************************************************/
358
359/*
360Arguments:
361 tv1 the first time
362 tv2 the second time
363
364Returns: -1, 0, or +1
365*/
366
32dfdf8b 367static int
059ec3d9
PH
368exim_tvcmp(struct timeval *t1, struct timeval *t2)
369{
370if (t1->tv_sec > t2->tv_sec) return +1;
371if (t1->tv_sec < t2->tv_sec) return -1;
372if (t1->tv_usec > t2->tv_usec) return +1;
373if (t1->tv_usec < t2->tv_usec) return -1;
374return 0;
375}
376
377
378
379
380/*************************************************
381* Clock tick wait function *
382*************************************************/
383
6906c131
JH
384#ifdef _POSIX_MONOTONIC_CLOCK
385/* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
386static struct timespec offset_ts;
387
388static void
389exim_clock_init(void)
390{
391struct timeval tv;
392if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
393(void)gettimeofday(&tv, NULL);
394offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
395offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
396if (offset_ts.tv_nsec >= 0) return;
397offset_ts.tv_sec--;
398offset_ts.tv_nsec += 1000*1000*1000;
399}
400#endif
401
402
059ec3d9
PH
403/* Exim uses a time + a pid to generate a unique identifier in two places: its
404message IDs, and in file names for maildir deliveries. Because some OS now
405re-use pids within the same second, sub-second times are now being used.
4c04137d 406However, for absolute certainty, we must ensure the clock has ticked before
059ec3d9
PH
407allowing the relevant process to complete. At the time of implementation of
408this code (February 2003), the speed of processors is such that the clock will
409invariably have ticked already by the time a process has done its job. This
410function prepares for the time when things are faster - and it also copes with
411clocks that go backwards.
412
413Arguments:
6906c131 414 tgt_tv A timeval which was used to create uniqueness; its usec field
059ec3d9
PH
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
420Returns: nothing
421*/
422
423void
6906c131 424exim_wait_tick(struct timeval * tgt_tv, int resolution)
059ec3d9
PH
425{
426struct timeval now_tv;
427long int now_true_usec;
428
6906c131
JH
429#ifdef _POSIX_MONOTONIC_CLOCK
430struct timespec now_ts;
431
432if (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 }
444else
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 }
059ec3d9 451
6906c131 452while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
059ec3d9
PH
453 {
454 struct itimerval itval;
455 itval.it_interval.tv_sec = 0;
456 itval.it_interval.tv_usec = 0;
6906c131
JH
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;
059ec3d9
PH
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"
6906c131 462 is more than a second less than "tgt". That means that itval.it_value.tv_sec
059ec3d9
PH
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 {
8768d548 473 if (!f.running_in_test_harness)
059ec3d9 474 {
d0291a0a 475 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
6906c131 476 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
7437665e 477 now_tv.tv_sec, (long) now_tv.tv_usec);
6906c131 478 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
d0291a0a 479 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
059ec3d9
PH
480 }
481 }
482
483 milliwait(&itval);
fce5c23c
ST
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;
059ec3d9
PH
491 }
492}
493
494
495
496
497/*************************************************
2632889e
PH
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
502is specified in the open() call. However, there are some files, typically in
503the spool directory, that are created with fopen(). They end up world-writeable
504if no precautions are taken. Although the spool directory is not accessible to
505the world, this is an untidiness. So this is a wrapper function for fopen()
506that sorts out the mode of the created file.
507
508Arguments:
509 filename the file name
510 options the fopen() options
511 mode the required mode
512
513Returns: the fopened FILE or NULL
514*/
515
516FILE *
1ba28e2b 517modefopen(const uschar *filename, const char *options, mode_t mode)
2632889e 518{
67d175de
PH
519mode_t saved_umask = umask(0777);
520FILE *f = Ufopen(filename, options);
521(void)umask(saved_umask);
2632889e
PH
522if (f != NULL) (void)fchmod(fileno(f), mode);
523return f;
524}
525
526
2632889e 527/*************************************************
059ec3d9
PH
528* Ensure stdin, stdout, and stderr exist *
529*************************************************/
530
531/* Some operating systems grumble if an exec() happens without a standard
532input, output, and error (fds 0, 1, 2) being defined. The worry is that some
533file will be opened and will use these fd values, and then some other bit of
534code will assume, for example, that it can write error messages to stderr.
535This function ensures that fds 0, 1, and 2 are open if they do not already
536exist, by connecting them to /dev/null.
537
538This function is also used to ensure that std{in,out,err} exist at all times,
539so that if any library that Exim calls tries to use them, it doesn't crash.
540
541Arguments: None
542Returns: Nothing
543*/
544
545void
546exim_nullstd(void)
547{
059ec3d9
PH
548int devnull = -1;
549struct stat statbuf;
d7978c0f 550for (int i = 0; i <= 2; i++)
059ec3d9
PH
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",
f3ebb786 556 string_open_failed(errno, "/dev/null", NULL));
1fe64dcc 557 if (devnull != i) (void)dup2(devnull, i);
059ec3d9
PH
558 }
559 }
1fe64dcc 560if (devnull > 2) (void)close(devnull);
059ec3d9
PH
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
571an incoming message, either directly, or using exec.
572
573We want any smtp input streams to be closed in this new process. However, it
574has been observed that using fclose() here causes trouble. When reading in -bS
575input, duplicate copies of messages have been seen. The files will be sharing a
576file pointer with the parent process, and it seems that fclose() (at least on
577some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
578least sometimes. Hence we go for closing the underlying file descriptors.
579
580If TLS is active, we want to shut down the TLS library, but without molesting
581the parent's SSL connection.
582
583For delivery of a non-SMTP message, we want to close stdin and stdout (and
584stderr unless debugging) because the calling process might have set them up as
585pipes and be waiting for them to close before it waits for the submission
586process to terminate. If they aren't closed, they hold up the calling process
587until the initial delivery process finishes, which is not what we want.
588
589Exception: We do want it for synchronous delivery!
590
591And notwithstanding all the above, if D_resolver is set, implying resolver
592debugging, leave stdout open, because that's where the resolver writes its
593debugging output.
594
595When we close stderr (which implies we've also closed stdout), we also get rid
596of any controlling terminal.
597
598Arguments: None
599Returns: Nothing
600*/
601
602static void
603close_unwanted(void)
604{
605if (smtp_input)
606 {
01603eec 607#ifndef DISABLE_TLS
74f1a423
JH
608 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
609#endif
1fe64dcc
PH
610 (void)close(fileno(smtp_in));
611 (void)close(fileno(smtp_out));
059ec3d9
PH
612 smtp_in = NULL;
613 }
614else
615 {
1fe64dcc
PH
616 (void)close(0); /* stdin */
617 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
618 if (debug_selector == 0) /* stderr */
059ec3d9 619 {
8768d548 620 if (!f.synchronous_delivery)
059ec3d9 621 {
1fe64dcc 622 (void)close(2);
059ec3d9
PH
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
638initgroups() to set auxiliary groups. There are some special cases when running
639Exim in unprivileged modes. In these situations the effective uid will not be
640root; if we already have the right effective uid/gid, and don't need to
641initialize any groups, leave things as they are.
642
643Arguments:
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
649Returns: nothing; bombs out on failure
650*/
651
652void
653exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
654{
655uid_t euid = geteuid();
656gid_t egid = getegid();
657
658if (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);
9af3c549
JH
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));
059ec3d9
PH
673 }
674
675 if (setgid(gid) < 0 || setuid(uid) < 0)
059ec3d9
PH
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);
059ec3d9
PH
678 }
679
680/* Debugging output included uid/gid and all groups */
681
682DEBUG(D_uid)
683 {
cd59ab18 684 int group_count, save_errno;
157d73b5 685 gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9
PH
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());
157d73b5 688 group_count = getgroups(nelem(group_list), group_list);
cd59ab18 689 save_errno = errno;
059ec3d9
PH
690 debug_printf(" auxiliary group list:");
691 if (group_count > 0)
d7978c0f 692 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
cd59ab18
PP
693 else if (group_count < 0)
694 debug_printf(" <error: %s>", strerror(save_errno));
059ec3d9
PH
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
708databases.
709
710Arguments:
711 rc return code
712
713Returns: does not return
714*/
715
716void
9bfb7e1b 717exim_exit(int rc, const uschar * process)
059ec3d9
PH
718{
719search_tidyup();
f3ebb786 720store_exit();
059ec3d9 721DEBUG(D_any)
9bfb7e1b
JH
722 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
723 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
724 process ? "(" : "", process, process ? ") " : "", rc);
059ec3d9
PH
725exit(rc);
726}
727
728
f3ebb786
JH
729void
730exim_underbar_exit(int rc)
731{
732store_exit();
733_exit(rc);
734}
735
736
059ec3d9 737
9af3c549
JH
738/* Print error string, then die */
739static void
740exim_fail(const char * fmt, ...)
741{
742va_list ap;
743va_start(ap, fmt);
744vfprintf(stderr, fmt, ap);
745exit(EXIT_FAILURE);
746}
747
b66fecb4
HSHR
748/* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
749of chown()/fchown(). See src/functions.h for more explanation */
750int
751exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
752{
ecf14f2a 753int saved_errno = errno; /* from the preceeding chown call */
b66fecb4
HSHR
754#if 1
755log_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
b66fecb4
HSHR
765struct stat buf;
766
767if (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}
772else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
773
ecf14f2a 774#endif
b66fecb4
HSHR
775errno = saved_errno;
776return -1;
b66fecb4 777}
9af3c549 778
059ec3d9
PH
779
780/*************************************************
781* Extract port from host address *
782*************************************************/
783
784/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
PH
785It also checks the syntax of the address, and terminates it before the
786port data when a port is extracted.
059ec3d9
PH
787
788Argument:
789 address the address, with possible port on the end
790
791Returns: the port, or zero if there isn't one
792 bombs out on a syntax error
793*/
794
795static int
796check_port(uschar *address)
797{
7cd1141b 798int port = host_address_extract_port(address);
8e669ac1 799if (string_is_ip_address(address, NULL) == 0)
9af3c549 800 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
059ec3d9
PH
801return 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
811address from a full RFC 822 address. This isn't really necessary per se, but it
812has the effect of collapsing source routes.
813
814Arguments:
815 s the address string
816 flags flag bits for verify_address()
817 exit_value to be set for failures
818
a5a28604 819Returns: nothing
059ec3d9
PH
820*/
821
822static void
823test_address(uschar *s, int flags, int *exit_value)
824{
825int start, end, domain;
826uschar *parse_error = NULL;
827uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
828 FALSE);
829if (address == NULL)
830 {
831 fprintf(stdout, "syntax error: %s\n", parse_error);
832 *exit_value = 2;
833 }
834else
835 {
836 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 837 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
838 if (rc == FAIL) *exit_value = 2;
839 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
840 }
841}
842
843
844
845/*************************************************
059ec3d9
PH
846* Show supported features *
847*************************************************/
848
059ec3d9 849static void
96508de1 850show_db_version(FILE * f)
059ec3d9
PH
851{
852#ifdef DB_VERSION_STRING
96508de1
JH
853DEBUG(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 }
859else
860 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
861
059ec3d9
PH
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
96508de1 868
059ec3d9
PH
869#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
870fprintf(f, "Probably ndbm\n");
871#elif defined(USE_TDB)
872fprintf(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
96508de1
JH
880}
881
882
883/* This function is called for -bV/--version and for -d to output the optional
884features of the current Exim binary.
885
886Arguments: a FILE for printing
887Returns: nothing
888*/
889
890static void
8768d548 891show_whats_supported(FILE * fp)
96508de1 892{
8768d548 893DEBUG(D_any) {} else show_db_version(fp);
059ec3d9 894
8768d548 895fprintf(fp, "Support for:");
9cec981f 896#ifdef SUPPORT_CRYPTEQ
8768d548 897 fprintf(fp, " crypteq");
9cec981f 898#endif
059ec3d9 899#if HAVE_ICONV
8768d548 900 fprintf(fp, " iconv()");
059ec3d9
PH
901#endif
902#if HAVE_IPV6
8768d548 903 fprintf(fp, " IPv6");
059ec3d9 904#endif
79378e0f 905#ifdef HAVE_SETCLASSRESOURCES
8768d548 906 fprintf(fp, " use_setclassresources");
929ba01c 907#endif
059ec3d9 908#ifdef SUPPORT_PAM
8768d548 909 fprintf(fp, " PAM");
059ec3d9
PH
910#endif
911#ifdef EXIM_PERL
8768d548 912 fprintf(fp, " Perl");
059ec3d9 913#endif
1a46a8c5 914#ifdef EXPAND_DLFUNC
8768d548 915 fprintf(fp, " Expand_dlfunc");
1a46a8c5 916#endif
059ec3d9 917#ifdef USE_TCP_WRAPPERS
8768d548 918 fprintf(fp, " TCPwrappers");
059ec3d9 919#endif
de517fd3 920#ifdef USE_GNUTLS
8768d548 921 fprintf(fp, " GnuTLS");
de517fd3
JH
922#endif
923#ifdef USE_OPENSSL
8768d548 924 fprintf(fp, " OpenSSL");
059ec3d9 925#endif
b2f5a032 926#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
8768d548 927 fprintf(fp, " translate_ip_address");
b2f5a032 928#endif
f174f16e 929#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8768d548 930 fprintf(fp, " move_frozen_messages");
f174f16e 931#endif
8523533c 932#ifdef WITH_CONTENT_SCAN
8768d548 933 fprintf(fp, " Content_Scanning");
8523533c 934#endif
c0635b6d 935#ifdef SUPPORT_DANE
8768d548 936 fprintf(fp, " DANE");
c0635b6d 937#endif
74f150bf 938#ifndef DISABLE_DKIM
8768d548 939 fprintf(fp, " DKIM");
74f150bf 940#endif
ef1bbb27 941#ifndef DISABLE_DNSSEC
8768d548 942 fprintf(fp, " DNSSEC");
ef1bbb27 943#endif
0cbf2b82 944#ifndef DISABLE_EVENT
8768d548 945 fprintf(fp, " Event");
0cbf2b82 946#endif
8c5d388a 947#ifdef SUPPORT_I18N
8768d548 948 fprintf(fp, " I18N");
8c5d388a 949#endif
74f150bf 950#ifndef DISABLE_OCSP
8768d548 951 fprintf(fp, " OCSP");
74f150bf 952#endif
81344b40 953#ifndef DISABLE_PIPE_CONNECT
4e48d56c
JH
954 fprintf(fp, " PIPE_CONNECT");
955#endif
4d832da1 956#ifndef DISABLE_PRDR
8768d548 957 fprintf(fp, " PRDR");
4d832da1 958#endif
cee5f132 959#ifdef SUPPORT_PROXY
8768d548 960 fprintf(fp, " PROXY");
cee5f132 961#endif
f0989ec0 962#ifdef SUPPORT_SOCKS
8768d548 963 fprintf(fp, " SOCKS");
f2de3a33 964#endif
7952eef9 965#ifdef SUPPORT_SPF
8768d548 966 fprintf(fp, " SPF");
7952eef9 967#endif
1a2e76e1
JH
968#ifdef SUPPORT_DMARC
969 fprintf(fp, " DMARC");
970#endif
1a2dfad5 971#ifdef TCP_FASTOPEN
d85cdeb5 972 tcp_init();
8768d548 973 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
1a2dfad5 974#endif
617d3932 975#ifdef EXPERIMENTAL_ARC
8768d548 976 fprintf(fp, " Experimental_ARC");
617d3932 977#endif
8523533c 978#ifdef EXPERIMENTAL_BRIGHTMAIL
8768d548 979 fprintf(fp, " Experimental_Brightmail");
8523533c 980#endif
6a8f9482 981#ifdef EXPERIMENTAL_DCC
8768d548 982 fprintf(fp, " Experimental_DCC");
6a8f9482 983#endif
895fbaf2 984#ifdef EXPERIMENTAL_DSN_INFO
8768d548 985 fprintf(fp, " Experimental_DSN_info");
895fbaf2 986#endif
ff966302
JH
987#ifdef EXPERIMENTAL_LMDB
988 fprintf(fp, " Experimental_LMDB");
989#endif
990#ifdef EXPERIMENTAL_QUEUE_RAMP
991 fprintf(fp, " Experimental_Queue_Ramp");
992#endif
993#ifdef EXPERIMENTAL_QUEUEFILE
994 fprintf(fp, " Experimental_QUEUEFILE");
995#endif
996#if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
997 fprintf(fp, " Experimental_SRS");
998#endif
b10c87b3
JH
999#ifdef EXPERIMENTAL_TLS_RESUME
1000 fprintf(fp, " Experimental_TLS_resume");
1001#endif
8768d548 1002fprintf(fp, "\n");
059ec3d9 1003
8768d548 1004fprintf(fp, "Lookups (built-in):");
e6d225ae 1005#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
8768d548 1006 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
059ec3d9 1007#endif
e6d225ae 1008#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
8768d548 1009 fprintf(fp, " cdb");
059ec3d9 1010#endif
e6d225ae 1011#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
8768d548 1012 fprintf(fp, " dbm dbmjz dbmnz");
059ec3d9 1013#endif
e6d225ae 1014#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
8768d548 1015 fprintf(fp, " dnsdb");
059ec3d9 1016#endif
e6d225ae 1017#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
8768d548 1018 fprintf(fp, " dsearch");
059ec3d9 1019#endif
e6d225ae 1020#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
8768d548 1021 fprintf(fp, " ibase");
059ec3d9 1022#endif
ffc92d69
JH
1023#if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1024 fprintf(fp, " json");
1025#endif
e6d225ae 1026#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
8768d548 1027 fprintf(fp, " ldap ldapdn ldapm");
059ec3d9 1028#endif
5bde3efa 1029#ifdef EXPERIMENTAL_LMDB
8768d548 1030 fprintf(fp, " lmdb");
5bde3efa 1031#endif
e6d225ae 1032#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
8768d548 1033 fprintf(fp, " mysql");
059ec3d9 1034#endif
e6d225ae 1035#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
8768d548 1036 fprintf(fp, " nis nis0");
059ec3d9 1037#endif
e6d225ae 1038#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
8768d548 1039 fprintf(fp, " nisplus");
059ec3d9 1040#endif
e6d225ae 1041#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
8768d548 1042 fprintf(fp, " oracle");
059ec3d9 1043#endif
e6d225ae 1044#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
8768d548 1045 fprintf(fp, " passwd");
059ec3d9 1046#endif
e6d225ae 1047#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
8768d548 1048 fprintf(fp, " pgsql");
059ec3d9 1049#endif
de78e2d5 1050#if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
8768d548 1051 fprintf(fp, " redis");
de78e2d5 1052#endif
e6d225ae 1053#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
8768d548 1054 fprintf(fp, " sqlite");
13b685f9 1055#endif
e6d225ae 1056#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
8768d548 1057 fprintf(fp, " testdb");
059ec3d9 1058#endif
e6d225ae 1059#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
8768d548 1060 fprintf(fp, " whoson");
059ec3d9 1061#endif
8768d548 1062fprintf(fp, "\n");
059ec3d9 1063
8768d548
JH
1064auth_show_supported(fp);
1065route_show_supported(fp);
1066transport_show_supported(fp);
059ec3d9 1067
c11d665d 1068#ifdef WITH_CONTENT_SCAN
8768d548 1069malware_show_supported(fp);
c11d665d
JH
1070#endif
1071
059ec3d9
PH
1072if (fixed_never_users[0] > 0)
1073 {
1074 int i;
8768d548 1075 fprintf(fp, "Fixed never_users: ");
059ec3d9 1076 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
8768d548
JH
1077 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1078 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
059ec3d9 1079 }
21c28500 1080
8768d548 1081fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
19bfe9e7 1082
8768d548 1083fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 1084
6545de78
PP
1085/* Everything else is details which are only worth reporting when debugging.
1086Perhaps the tls_version_report should move into this too. */
1087DEBUG(D_any) do {
1088
b3c261f7
PP
1089/* clang defines __GNUC__ (at least, for me) so test for it first */
1090#if defined(__clang__)
8768d548 1091 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
b3c261f7 1092#elif defined(__GNUC__)
8768d548 1093 fprintf(fp, "Compiler: GCC [%s]\n",
b3c261f7
PP
1094# ifdef __VERSION__
1095 __VERSION__
1096# else
1097 "? unknown version ?"
1098# endif
1099 );
1100#else
8768d548 1101 fprintf(fp, "Compiler: <unknown>\n");
b3c261f7
PP
1102#endif
1103
98913c8e 1104#if defined(__GLIBC__) && !defined(__UCLIBC__)
8768d548 1105 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
01f3091a
JH
1106 __GLIBC__, __GLIBC_MINOR__);
1107 if (__GLIBC_PREREQ(2, 1))
8768d548 1108 fprintf(fp, " Runtime: %s\n",
01f3091a
JH
1109 gnu_get_libc_version());
1110#endif
1111
8768d548 1112show_db_version(fp);
96508de1 1113
01603eec 1114#ifndef DISABLE_TLS
8768d548 1115 tls_version_report(fp);
754a0503 1116#endif
8c5d388a 1117#ifdef SUPPORT_I18N
8768d548 1118 utf8_version_report(fp);
b04be5e7 1119#endif
85e453f6
JH
1120#ifdef SUPPORT_SPF
1121 spf_lib_version_report(fp);
1122#endif
754a0503 1123
d7978c0f 1124 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
fc362fc5 1125 if (authi->version_report)
8768d548 1126 (*authi->version_report)(fp);
6545de78 1127
decd95cb 1128 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1129 characters; unless it's an ancient version of PCRE in which case it
1130 is not defined. */
1131#ifndef PCRE_PRERELEASE
01f3091a 1132# define PCRE_PRERELEASE
6475bd82
PP
1133#endif
1134#define QUOTE(X) #X
1135#define EXPAND_AND_QUOTE(X) QUOTE(X)
8768d548 1136 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
6545de78
PP
1137 " Runtime: %s\n",
1138 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1139 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1140 pcre_version());
6475bd82
PP
1141#undef QUOTE
1142#undef EXPAND_AND_QUOTE
6545de78
PP
1143
1144 init_lookup_list();
d7978c0f 1145 for (int i = 0; i < lookup_list_count; i++)
6545de78 1146 if (lookup_list[i]->version_report)
8768d548 1147 lookup_list[i]->version_report(fp);
6545de78 1148
b70d2586 1149#ifdef WHITELIST_D_MACROS
8768d548 1150 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
b70d2586 1151#else
8768d548 1152 fprintf(fp, "WHITELIST_D_MACROS unset\n");
b70d2586
PP
1153#endif
1154#ifdef TRUSTED_CONFIG_LIST
8768d548 1155 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
b70d2586 1156#else
8768d548 1157 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
b70d2586
PP
1158#endif
1159
6545de78 1160} while (0);
059ec3d9
PH
1161}
1162
1163
98a90c36
PP
1164/*************************************************
1165* Show auxiliary information about Exim *
1166*************************************************/
1167
1168static void
1169show_exim_information(enum commandline_info request, FILE *stream)
1170{
98a90c36
PP
1171switch(request)
1172 {
1173 case CMDINFO_NONE:
1174 fprintf(stream, "Oops, something went wrong.\n");
1175 return;
1176 case CMDINFO_HELP:
1177 fprintf(stream,
1178"The -bI: flag takes a string indicating which information to provide.\n"
1179"If the string is not recognised, you'll get this help (on stderr).\n"
1180"\n"
1181" exim -bI:help this information\n"
030caf2a
JS
1182" exim -bI:dscp list of known dscp value keywords\n"
1183" exim -bI:sieve list of supported sieve extensions\n"
98a90c36
PP
1184);
1185 return;
1186 case CMDINFO_SIEVE:
d7978c0f 1187 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
98a90c36
PP
1188 fprintf(stream, "%s\n", *pp);
1189 return;
36a3ae5f
PP
1190 case CMDINFO_DSCP:
1191 dscp_list_to_stream(stream);
1192 return;
98a90c36
PP
1193 }
1194}
059ec3d9
PH
1195
1196
1197/*************************************************
1198* Quote a local part *
1199*************************************************/
1200
1201/* This function is used when a sender address or a From: or Sender: header
1202line is being created from the caller's login, or from an authenticated_id. It
1203applies appropriate quoting rules for a local part.
1204
1205Argument: the local part
1206Returns: the local part, quoted if necessary
1207*/
1208
1209uschar *
1210local_part_quote(uschar *lpart)
1211{
1212BOOL needs_quote = FALSE;
acec9514 1213gstring * g;
059ec3d9 1214
d7978c0f 1215for (uschar * t = lpart; !needs_quote && *t != 0; t++)
059ec3d9
PH
1216 {
1217 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1218 (*t != '.' || t == lpart || t[1] == 0);
1219 }
1220
1221if (!needs_quote) return lpart;
1222
acec9514 1223g = string_catn(NULL, US"\"", 1);
059ec3d9
PH
1224
1225for (;;)
1226 {
1227 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1228 if (nq == NULL)
1229 {
acec9514 1230 g = string_cat(g, lpart);
059ec3d9
PH
1231 break;
1232 }
acec9514
JH
1233 g = string_catn(g, lpart, nq - lpart);
1234 g = string_catn(g, US"\\", 1);
1235 g = string_catn(g, nq, 1);
059ec3d9
PH
1236 lpart = nq + 1;
1237 }
1238
acec9514
JH
1239g = string_catn(g, US"\"", 1);
1240return string_from_gstring(g);
059ec3d9
PH
1241}
1242
1243
1244
1245#ifdef USE_READLINE
1246/*************************************************
1247* Load readline() functions *
1248*************************************************/
1249
1250/* This function is called from testing executions that read data from stdin,
1251but only when running as the calling user. Currently, only -be does this. The
1252function loads the readline() function library and passes back the functions.
1253On some systems, it needs the curses library, so load that too, but try without
1254it if loading fails. All this functionality has to be requested at build time.
1255
1256Arguments:
1257 fn_readline_ptr pointer to where to put the readline pointer
1258 fn_addhist_ptr pointer to where to put the addhistory function
1259
1260Returns: the dlopen handle or NULL on failure
1261*/
1262
1263static void *
1ba28e2b
PP
1264set_readline(char * (**fn_readline_ptr)(const char *),
1265 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1266{
1267void *dlhandle;
e12f8c32 1268void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1269
e12f8c32 1270dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
b1c673dd 1271if (dlhandle_curses) dlclose(dlhandle_curses);
059ec3d9 1272
b1c673dd 1273if (dlhandle)
059ec3d9 1274 {
1ba28e2b
PP
1275 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1276 * char * readline (const char *prompt);
1277 * void add_history (const char *string);
1278 */
1279 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1280 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1281 }
1282else
059ec3d9 1283 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
059ec3d9
PH
1284
1285return dlhandle;
1286}
1287#endif
1288
1289
1290
1291/*************************************************
1292* Get a line from stdin for testing things *
1293*************************************************/
1294
1295/* This function is called when running tests that can take a number of lines
1296of input (for example, -be and -bt). It handles continuations and trailing
1297spaces. And prompting and a blank line output on eof. If readline() is in use,
1298the arguments are non-NULL and provide the relevant functions.
1299
1300Arguments:
1301 fn_readline readline function or NULL
1302 fn_addhist addhist function or NULL
1303
1304Returns: pointer to dynamic memory, or NULL at end of file
1305*/
1306
1307static uschar *
1ba28e2b 1308get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9 1309{
acec9514 1310gstring * g = NULL;
059ec3d9 1311
acec9514 1312if (!fn_readline) { printf("> "); fflush(stdout); }
059ec3d9 1313
d7978c0f 1314for (int i = 0;; i++)
059ec3d9
PH
1315 {
1316 uschar buffer[1024];
1317 uschar *p, *ss;
1318
1319 #ifdef USE_READLINE
1320 char *readline_line = NULL;
f3ebb786 1321 if (fn_readline)
059ec3d9 1322 {
f3ebb786
JH
1323 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1324 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
059ec3d9
PH
1325 p = US readline_line;
1326 }
1327 else
1328 #endif
1329
1330 /* readline() not in use */
1331
1332 {
1333 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1334 p = buffer;
1335 }
1336
1337 /* Handle the line */
1338
1339 ss = p + (int)Ustrlen(p);
1340 while (ss > p && isspace(ss[-1])) ss--;
1341
1342 if (i > 0)
059ec3d9 1343 while (p < ss && isspace(*p)) p++; /* leading space after cont */
059ec3d9 1344
acec9514 1345 g = string_catn(g, p, ss - p);
059ec3d9
PH
1346
1347 #ifdef USE_READLINE
acec9514 1348 if (fn_readline) free(readline_line);
059ec3d9
PH
1349 #endif
1350
acec9514
JH
1351 /* g can only be NULL if ss==p */
1352 if (ss == p || g->s[g->ptr-1] != '\\')
059ec3d9 1353 break;
acec9514
JH
1354
1355 --g->ptr;
1356 (void) string_from_gstring(g);
059ec3d9
PH
1357 }
1358
acec9514
JH
1359if (!g) printf("\n");
1360return string_from_gstring(g);
059ec3d9
PH
1361}
1362
1363
1364
1365/*************************************************
81ea09ca
NM
1366* Output usage information for the program *
1367*************************************************/
1368
1369/* This function is called when there are no recipients
1370 or a specific --help argument was added.
1371
1372Arguments:
1373 progname information on what name we were called by
1374
1375Returns: DOES NOT RETURN
1376*/
1377
1378static void
1379exim_usage(uschar *progname)
1380{
1381
4c04137d 1382/* Handle specific program invocation variants */
81ea09ca 1383if (Ustrcmp(progname, US"-mailq") == 0)
9af3c549 1384 exim_fail(
e765a0f1 1385 "mailq - list the contents of the mail queue\n\n"
81ea09ca 1386 "For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1387
1388/* Generic usage - we output this whatever happens */
9af3c549 1389exim_fail(
81ea09ca
NM
1390 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1391 "not directly from a shell command line. Options and/or arguments control\n"
1392 "what it does when called. For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1393}
1394
1395
1396
1397/*************************************************
a7cbbf50
PP
1398* Validate that the macros given are okay *
1399*************************************************/
1400
1401/* Typically, Exim will drop privileges if macros are supplied. In some
1402cases, we want to not do so.
1403
a4034eb8 1404Arguments: opt_D_used - true if the commandline had a "-D" option
a7cbbf50
PP
1405Returns: true if trusted, false otherwise
1406*/
1407
1408static BOOL
a4034eb8 1409macros_trusted(BOOL opt_D_used)
a7cbbf50
PP
1410{
1411#ifdef WHITELIST_D_MACROS
d7978c0f 1412uschar *whitelisted, *end, *p, **whites;
a7cbbf50
PP
1413int white_count, i, n;
1414size_t len;
1415BOOL prev_char_item, found;
1416#endif
1417
a4034eb8 1418if (!opt_D_used)
a7cbbf50
PP
1419 return TRUE;
1420#ifndef WHITELIST_D_MACROS
1421return FALSE;
1422#else
1423
66581d1e
PP
1424/* We only trust -D overrides for some invoking users:
1425root, the exim run-time user, the optional config owner user.
1426I don't know why config-owner would be needed, but since they can own the
1427config files anyway, there's no security risk to letting them override -D. */
1428if ( ! ((real_uid == root_uid)
1429 || (real_uid == exim_uid)
1430#ifdef CONFIGURE_OWNER
1431 || (real_uid == config_uid)
1432#endif
1433 ))
1434 {
1435 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1436 return FALSE;
1437 }
1438
a7cbbf50 1439/* Get a list of macros which are whitelisted */
f3ebb786 1440whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
a7cbbf50
PP
1441prev_char_item = FALSE;
1442white_count = 0;
1443for (p = whitelisted; *p != '\0'; ++p)
1444 {
1445 if (*p == ':' || isspace(*p))
1446 {
1447 *p = '\0';
1448 if (prev_char_item)
1449 ++white_count;
1450 prev_char_item = FALSE;
1451 continue;
1452 }
1453 if (!prev_char_item)
1454 prev_char_item = TRUE;
1455 }
1456end = p;
1457if (prev_char_item)
1458 ++white_count;
1459if (!white_count)
1460 return FALSE;
1461whites = store_malloc(sizeof(uschar *) * (white_count+1));
1462for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1463 {
1464 if (*p != '\0')
1465 {
1466 whites[i++] = p;
1467 if (i == white_count)
1468 break;
1469 while (*p != '\0' && p < end)
1470 ++p;
1471 }
1472 }
1473whites[i] = NULL;
1474
1a7c9a48
JH
1475/* The list of commandline macros should be very short.
1476Accept the N*M complexity. */
d7978c0f 1477for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1a7c9a48
JH
1478 {
1479 found = FALSE;
d7978c0f 1480 for (uschar ** w = whites; *w; ++w)
1a7c9a48
JH
1481 if (Ustrcmp(*w, m->name) == 0)
1482 {
1483 found = TRUE;
1484 break;
1485 }
1486 if (!found)
1487 return FALSE;
1488 if (!m->replacement)
1489 continue;
1490 if ((len = m->replen) == 0)
1491 continue;
1492 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1493 0, PCRE_EOPT, NULL, 0);
1494 if (n < 0)
1495 {
1496 if (n != PCRE_ERROR_NOMATCH)
1497 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1498 return FALSE;
1499 }
1500 }
43236f35 1501DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1502return TRUE;
1503#endif
1504}
1505
1506
1507/*************************************************
9650d98a
JH
1508* Expansion testing *
1509*************************************************/
1510
1511/* Expand and print one item, doing macro-processing.
1512
1513Arguments:
1514 item line for expansion
1515*/
1516
1517static void
1518expansion_test_line(uschar * line)
1519{
1520int len;
1521BOOL dummy_macexp;
1522
1523Ustrncpy(big_buffer, line, big_buffer_size);
1524big_buffer[big_buffer_size-1] = '\0';
1525len = Ustrlen(big_buffer);
1526
1527(void) macros_expand(0, &len, &dummy_macexp);
1528
1529if (isupper(big_buffer[0]))
1530 {
1531 if (macro_read_assignment(big_buffer))
1a7c9a48 1532 printf("Defined macro '%s'\n", mlast->name);
9650d98a
JH
1533 }
1534else
1535 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1536 else printf("Failed: %s\n", expand_string_message);
1537}
1538
1539
9af3c549 1540
9650d98a 1541/*************************************************
059ec3d9
PH
1542* Entry point and high-level code *
1543*************************************************/
1544
1545/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1546the appropriate action. All the necessary functions are present in the one
1547binary. I originally thought one should split it up, but it turns out that so
1548much of the apparatus is needed in each chunk that one might as well just have
1549it all available all the time, which then makes the coding easier as well.
1550
1551Arguments:
1552 argc count of entries in argv
1553 argv argument strings, with argv[0] being the program name
1554
1555Returns: EXIT_SUCCESS if terminated successfully
1556 EXIT_FAILURE otherwise, except when a message has been sent
1557 to the sender, and -oee was given
1558*/
1559
1560int
1561main(int argc, char **cargv)
1562{
1563uschar **argv = USS cargv;
1564int arg_receive_timeout = -1;
1565int arg_smtp_receive_timeout = -1;
1566int arg_error_handling = error_handling;
f05da2e8
PH
1567int filter_sfd = -1;
1568int filter_ufd = -1;
059ec3d9 1569int group_count;
1670ef10 1570int i, rv;
059ec3d9
PH
1571int list_queue_option = 0;
1572int msg_action = 0;
1573int msg_action_arg = -1;
1574int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1575int queue_only_reason = 0;
1576#ifdef EXIM_PERL
1577int perl_start_option = 0;
1578#endif
1579int recipients_arg = argc;
1580int sender_address_domain = 0;
1581int test_retry_arg = -1;
1582int test_rewrite_arg = -1;
3b7ac02c 1583gid_t original_egid;
059ec3d9
PH
1584BOOL arg_queue_only = FALSE;
1585BOOL bi_option = FALSE;
1586BOOL checking = FALSE;
1587BOOL count_queue = FALSE;
1588BOOL expansion_test = FALSE;
1589BOOL extract_recipients = FALSE;
f4ee74ac 1590BOOL flag_G = FALSE;
12f69989 1591BOOL flag_n = FALSE;
059ec3d9
PH
1592BOOL forced_delivery = FALSE;
1593BOOL f_end_dot = FALSE;
1594BOOL deliver_give_up = FALSE;
1595BOOL list_queue = FALSE;
1596BOOL list_options = FALSE;
bf3c2c6b 1597BOOL list_config = FALSE;
059ec3d9
PH
1598BOOL local_queue_only;
1599BOOL more = TRUE;
1600BOOL one_msg_action = FALSE;
4ab69ec7 1601BOOL opt_D_used = FALSE;
059ec3d9
PH
1602BOOL queue_only_set = FALSE;
1603BOOL receiving_message = TRUE;
33d73e3b 1604BOOL sender_ident_set = FALSE;
8669f003 1605BOOL session_local_queue_only;
059ec3d9
PH
1606BOOL unprivileged;
1607BOOL removed_privilege = FALSE;
81ea09ca 1608BOOL usage_wanted = FALSE;
059ec3d9
PH
1609BOOL verify_address_mode = FALSE;
1610BOOL verify_as_sender = FALSE;
1611BOOL version_printed = FALSE;
1612uschar *alias_arg = NULL;
1613uschar *called_as = US"";
a3fb9793 1614uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1615uschar *start_queue_run_id = NULL;
1616uschar *stop_queue_run_id = NULL;
328895cc 1617uschar *expansion_test_message = NULL;
059ec3d9
PH
1618uschar *ftest_domain = NULL;
1619uschar *ftest_localpart = NULL;
1620uschar *ftest_prefix = NULL;
1621uschar *ftest_suffix = NULL;
0ad2e0fc 1622uschar *log_oneline = NULL;
8544e77a 1623uschar *malware_test_file = NULL;
059ec3d9
PH
1624uschar *real_sender_address;
1625uschar *originator_home = US"/";
a3fb9793 1626size_t sz;
f3ebb786 1627rmark reset_point;
059ec3d9
PH
1628
1629struct passwd *pw;
1630struct stat statbuf;
1631pid_t passed_qr_pid = (pid_t)0;
1632int passed_qr_pipe = -1;
157d73b5 1633gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9 1634
98a90c36
PP
1635/* For the -bI: flag */
1636enum commandline_info info_flag = CMDINFO_NONE;
1637BOOL info_stdout = FALSE;
1638
059ec3d9
PH
1639/* Possible options for -R and -S */
1640
1641static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1642
1643/* Need to define this in case we need to change the environment in order
1644to get rid of a bogus time zone. We have to make it char rather than uschar
1645because some OS define it in /usr/include/unistd.h. */
1646
1647extern char **environ;
1648
9f01e50d
JH
1649#ifdef MEASURE_TIMING
1650(void)gettimeofday(&timestamp_startup, NULL);
1651#endif
1652
35edf2ff 1653/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1654defined by ref:name at build time, we must now find the actual uid/gid values.
1655This is a feature to make the lives of binary distributors easier. */
1656
1657#ifdef EXIM_USERNAME
1658if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1659 {
10385c15 1660 if (exim_uid == 0)
9af3c549
JH
1661 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1662
084c1d8c
PP
1663 /* If ref:name uses a number as the name, route_finduser() returns
1664 TRUE with exim_uid set and pw coerced to NULL. */
1665 if (pw)
1666 exim_gid = pw->pw_gid;
1667#ifndef EXIM_GROUPNAME
1668 else
9af3c549 1669 exim_fail(
084c1d8c
PP
1670 "exim: ref:name should specify a usercode, not a group.\n"
1671 "exim: can't let you get away with it unless you also specify a group.\n");
084c1d8c 1672#endif
059ec3d9
PH
1673 }
1674else
9af3c549 1675 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
059ec3d9
PH
1676#endif
1677
1678#ifdef EXIM_GROUPNAME
1679if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
9af3c549 1680 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
059ec3d9
PH
1681#endif
1682
1683#ifdef CONFIGURE_OWNERNAME
1684if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
9af3c549 1685 exim_fail("exim: failed to find uid for user name \"%s\"\n",
059ec3d9 1686 CONFIGURE_OWNERNAME);
059ec3d9
PH
1687#endif
1688
79d4bc3d
PP
1689/* We default the system_filter_user to be the Exim run-time user, as a
1690sane non-root value. */
1691system_filter_uid = exim_uid;
1692
35edf2ff
PH
1693#ifdef CONFIGURE_GROUPNAME
1694if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
9af3c549 1695 exim_fail("exim: failed to find gid for group name \"%s\"\n",
35edf2ff 1696 CONFIGURE_GROUPNAME);
35edf2ff
PH
1697#endif
1698
92e6a3d9
JH
1699/* In the Cygwin environment, some initialization used to need doing.
1700It was fudged in by means of this macro; now no longer but we'll leave
1701it in case of others. */
059ec3d9
PH
1702
1703#ifdef OS_INIT
1704OS_INIT
1705#endif
1706
1707/* Check a field which is patched when we are running Exim within its
1708testing harness; do a fast initial check, and then the whole thing. */
1709
8768d548 1710f.running_in_test_harness =
059ec3d9 1711 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
8768d548 1712if (f.running_in_test_harness)
65a32f85 1713 debug_store = TRUE;
059ec3d9
PH
1714
1715/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1716at the start of a program; however, it seems that some environments do not
1717follow this. A "strange" locale can affect the formatting of timestamps, so we
1718make quite sure. */
1719
1720setlocale(LC_ALL, "C");
1721
6906c131
JH
1722/* Get the offset between CLOCK_MONOTONIC and wallclock */
1723
1724#ifdef _POSIX_MONOTONIC_CLOCK
1725exim_clock_init();
1726#endif
1727
059ec3d9
PH
1728/* Set up the default handler for timing using alarm(). */
1729
1730os_non_restarting_signal(SIGALRM, sigalrm_handler);
1731
1732/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1733because store_malloc writes a log entry on failure. */
1734
40c90bca 1735if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
9af3c549 1736 exim_fail("exim: failed to get store for log buffer\n");
059ec3d9 1737
6c6d6e48
TF
1738/* Initialize the default log options. */
1739
1740bits_set(log_selector, log_selector_size, log_default);
1741
059ec3d9
PH
1742/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1743NULL when the daemon is run and the file is closed. We have to use this
1744indirection, because some systems don't allow writing to the variable "stderr".
1745*/
1746
1747if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1748
1749/* Arrange for the PCRE regex library to use our store functions. Note that
1750the normal calls are actually macros that add additional arguments for
1751debugging purposes so we have to assign specially constructed functions here.
1752The default is to use store in the stacking pool, but this is overridden in the
1753regex_must_compile() function. */
1754
1755pcre_malloc = function_store_get;
1756pcre_free = function_dummy_free;
1757
1758/* Ensure there is a big buffer for temporary use in several places. It is put
1759in malloc store so that it can be freed for enlargement if necessary. */
1760
1761big_buffer = store_malloc(big_buffer_size);
1762
1763/* Set up the handler for the data request signal, and set the initial
1764descriptive text. */
1765
f3ebb786 1766process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
059ec3d9
PH
1767set_process_info("initializing");
1768os_restarting_signal(SIGUSR1, usr1_handler);
1769
830832c9
HSHR
1770/* If running in a dockerized environment, the TERM signal is only
1771delegated to the PID 1 if we request it by setting an signal handler */
1772if (getpid() == 1) signal(SIGTERM, term_handler);
1773
059ec3d9
PH
1774/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1775in the daemon code. For the rest of Exim's uses, we ignore it. */
1776
1777signal(SIGHUP, SIG_IGN);
1778
1779/* We don't want to die on pipe errors as the code is written to handle
1780the write error instead. */
1781
1782signal(SIGPIPE, SIG_IGN);
1783
1784/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1785set to SIG_IGN. This causes subprocesses that complete before the parent
1786process waits for them not to hang around, so when Exim calls wait(), nothing
1787is there. The wait() code has been made robust against this, but let's ensure
1788that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1789ending status. We use sigaction rather than plain signal() on those OS where
1790SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1791problem on AIX with this.) */
1792
1793#ifdef SA_NOCLDWAIT
1794 {
1795 struct sigaction act;
1796 act.sa_handler = SIG_DFL;
1797 sigemptyset(&(act.sa_mask));
1798 act.sa_flags = 0;
1799 sigaction(SIGCHLD, &act, NULL);
1800 }
1801#else
1802signal(SIGCHLD, SIG_DFL);
1803#endif
1804
1805/* Save the arguments for use if we re-exec exim as a daemon after receiving
1806SIGHUP. */
1807
1808sighup_argv = argv;
1809
1810/* Set up the version number. Set up the leading 'E' for the external form of
1811message ids, set the pointer to the internal form, and initialize it to
1812indicate no message being processed. */
1813
1814version_init();
1815message_id_option[0] = '-';
1816message_id_external = message_id_option + 1;
1817message_id_external[0] = 'E';
1818message_id = message_id_external + 1;
1819message_id[0] = 0;
1820
67d175de 1821/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1822created with the modes that it specifies. NOTE: Files created with fopen() have
1823a problem, which was not recognized till rather late (February 2006). With this
1824umask, such files will be world writeable. (They are all content scanning files
1825in the spool directory, which isn't world-accessible, so this is not a
1826disaster, but it's untidy.) I don't want to change this overall setting,
1827however, because it will interact badly with the open() calls. Instead, there's
1828now a function called modefopen() that fiddles with the umask while calling
1829fopen(). */
059ec3d9 1830
67d175de 1831(void)umask(0);
059ec3d9
PH
1832
1833/* Precompile the regular expression for matching a message id. Keep this in
1834step with the code that generates ids in the accept.c module. We need to do
1835this here, because the -M options check their arguments for syntactic validity
1836using mac_ismsgid, which uses this. */
1837
1838regex_ismsgid =
1839 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1840
a5bd321b 1841/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1842code, possibly extended, at the start of an error message. Note that the
1843terminating whitespace character is included. */
a5bd321b
PH
1844
1845regex_smtp_code =
1846 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1847 FALSE, TRUE);
1848
a7cbbf50
PP
1849#ifdef WHITELIST_D_MACROS
1850/* Precompile the regular expression used to filter the content of macros
1851given to -D for permissibility. */
1852
1853regex_whitelisted_macro =
1854 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1855#endif
1856
f38917cc
JH
1857for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1858
059ec3d9
PH
1859/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1860this seems to be a generally accepted convention, since one finds symbolic
1861links called "mailq" in standard OS configurations. */
1862
1863if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1864 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1865 {
1866 list_queue = TRUE;
1867 receiving_message = FALSE;
1868 called_as = US"-mailq";
1869 }
1870
1871/* If the program is called as "rmail" treat it as equivalent to
1872"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1873i.e. preventing a single dot on a line from terminating the message, and
1874returning with zero return code, even in cases of error (provided an error
1875message has been sent). */
1876
1877if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1878 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1879 {
8768d548 1880 f.dot_ends = FALSE;
059ec3d9
PH
1881 called_as = US"-rmail";
1882 errors_sender_rc = EXIT_SUCCESS;
1883 }
1884
1885/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1886this is a smail convention. */
1887
1888if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1889 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1890 {
1891 smtp_input = smtp_batched_input = TRUE;
1892 called_as = US"-rsmtp";
1893 }
1894
1895/* If the program is called as "runq" treat it as equivalent to "exim -q";
1896this is a smail convention. */
1897
1898if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1899 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1900 {
1901 queue_interval = 0;
1902 receiving_message = FALSE;
1903 called_as = US"-runq";
1904 }
1905
1906/* If the program is called as "newaliases" treat it as equivalent to
1907"exim -bi"; this is a sendmail convention. */
1908
1909if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1910 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1911 {
1912 bi_option = TRUE;
1913 receiving_message = FALSE;
1914 called_as = US"-newaliases";
1915 }
1916
1917/* Save the original effective uid for a couple of uses later. It should
1918normally be root, but in some esoteric environments it may not be. */
1919
1920original_euid = geteuid();
3b7ac02c 1921original_egid = getegid();
059ec3d9
PH
1922
1923/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1924to be the same as the real ones. This makes a difference only if Exim is setuid
1925(or setgid) to something other than root, which could be the case in some
1926special configurations. */
1927
1928real_uid = getuid();
1929real_gid = getgid();
1930
1931if (real_uid == root_uid)
1932 {
9af3c549
JH
1933 if ((rv = setgid(real_gid)))
1934 exim_fail("exim: setgid(%ld) failed: %s\n",
1670ef10 1935 (long int)real_gid, strerror(errno));
9af3c549
JH
1936 if ((rv = setuid(real_uid)))
1937 exim_fail("exim: setuid(%ld) failed: %s\n",
1670ef10 1938 (long int)real_uid, strerror(errno));
059ec3d9
PH
1939 }
1940
1941/* If neither the original real uid nor the original euid was root, Exim is
1942running in an unprivileged state. */
1943
1944unprivileged = (real_uid != root_uid && original_euid != root_uid);
1945
059ec3d9
PH
1946/* Scan the program's arguments. Some can be dealt with right away; others are
1947simply recorded for checking and handling afterwards. Do a high-level switch
1948on the second character (the one after '-'), to save some effort. */
1949
1950for (i = 1; i < argc; i++)
1951 {
1952 BOOL badarg = FALSE;
1953 uschar *arg = argv[i];
1954 uschar *argrest;
1955 int switchchar;
1956
1957 /* An argument not starting with '-' is the start of a recipients list;
1958 break out of the options-scanning loop. */
1959
1960 if (arg[0] != '-')
1961 {
1962 recipients_arg = i;
1963 break;
1964 }
1965
4c04137d 1966 /* An option consisting of -- terminates the options */
059ec3d9
PH
1967
1968 if (Ustrcmp(arg, "--") == 0)
1969 {
1970 recipients_arg = i + 1;
1971 break;
1972 }
1973
1974 /* Handle flagged options */
1975
1976 switchchar = arg[1];
1977 argrest = arg+2;
1978
1979 /* Make all -ex options synonymous with -oex arguments, since that
1980 is assumed by various callers. Also make -qR options synonymous with -R
1981 options, as that seems to be required as well. Allow for -qqR too, and
1982 the same for -S options. */
1983
1984 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1985 Ustrncmp(arg+1, "qR", 2) == 0 ||
1986 Ustrncmp(arg+1, "qS", 2) == 0)
1987 {
1988 switchchar = arg[2];
1989 argrest++;
1990 }
1991 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1992 {
1993 switchchar = arg[3];
1994 argrest += 2;
8768d548 1995 f.queue_2stage = TRUE;
059ec3d9
PH
1996 }
1997
1998 /* Make -r synonymous with -f, since it is a documented alias */
1999
2000 else if (arg[1] == 'r') switchchar = 'f';
2001
2002 /* Make -ov synonymous with -v */
2003
2004 else if (Ustrcmp(arg, "-ov") == 0)
2005 {
2006 switchchar = 'v';
2007 argrest++;
2008 }
2009
4b2241d2
PP
2010 /* deal with --option_aliases */
2011 else if (switchchar == '-')
2012 {
2013 if (Ustrcmp(argrest, "help") == 0)
2014 {
2015 usage_wanted = TRUE;
2016 break;
2017 }
2018 else if (Ustrcmp(argrest, "version") == 0)
2019 {
2020 switchchar = 'b';
73a46702 2021 argrest = US"V";
4b2241d2
PP
2022 }
2023 }
2024
059ec3d9
PH
2025 /* High-level switch on active initial letter */
2026
2027 switch(switchchar)
2028 {
a3fb9793
PP
2029
2030 /* sendmail uses -Ac and -Am to control which .cf file is used;
2031 we ignore them. */
2032 case 'A':
2033 if (*argrest == '\0') { badarg = TRUE; break; }
2034 else
2035 {
2036 BOOL ignore = FALSE;
2037 switch (*argrest)
2038 {
2039 case 'c':
2040 case 'm':
2041 if (*(argrest + 1) == '\0')
2042 ignore = TRUE;
2043 break;
2044 }
bdcc6f2b 2045 if (!ignore) badarg = TRUE;
a3fb9793
PP
2046 }
2047 break;
2048
059ec3d9
PH
2049 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2050 so has no need of it. */
2051
2052 case 'B':
bdcc6f2b 2053 if (!*argrest) i++; /* Skip over the type */
059ec3d9
PH
2054 break;
2055
2056
2057 case 'b':
059ec3d9 2058 {
bdcc6f2b
JH
2059 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2060
2061 switch (*argrest++)
2062 {
2063 /* -bd: Run in daemon mode, awaiting SMTP connections.
2064 -bdf: Ditto, but in the foreground.
2065 */
2066 case 'd':
2067 f.daemon_listen = TRUE;
2068 if (*argrest == 'f') f.background_daemon = FALSE;
2069 else if (*argrest) badarg = TRUE;
2070 break;
2071
2072 /* -be: Run in expansion test mode
2073 -bem: Ditto, but read a message from a file first
2074 */
2075 case 'e':
2076 expansion_test = checking = TRUE;
2077 if (*argrest == 'm')
2078 {
2079 if (++i >= argc) { badarg = TRUE; break; }
2080 expansion_test_message = argv[i];
2081 argrest++;
2082 }
2083 if (*argrest) badarg = TRUE;
2084 break;
2085
2086 /* -bF: Run system filter test */
2087 case 'F':
2088 filter_test |= checking = FTEST_SYSTEM;
2089 if (*argrest) { badarg = TRUE; break; }
2090 if (++i < argc) filter_test_sfile = argv[i]; else
2091 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2092 break;
2093
2094 /* -bf: Run user filter test
2095 -bfd: Set domain for filter testing
2096 -bfl: Set local part for filter testing
2097 -bfp: Set prefix for filter testing
2098 -bfs: Set suffix for filter testing
2099 */
2100 case 'f':
2101 if (!*argrest)
2102 {
2103 filter_test |= checking = FTEST_USER;
2104 if (++i < argc) filter_test_ufile = argv[i];
2105 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2106 }
2107 else
2108 {
2109 if (++i >= argc)
2110 exim_fail("exim: string expected after %s\n", arg);
2111 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2112 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2113 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2114 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2115 else badarg = TRUE;
2116 }
2117 break;
2118
2119 /* -bh: Host checking - an IP address must follow. */
2120 case 'h':
2121 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2122 {
2123 if (++i >= argc) { badarg = TRUE; break; }
2124 sender_host_address = argv[i];
2125 host_checking = checking = f.log_testing_mode = TRUE;
2126 f.host_checking_callout = *argrest == 'c';
2127 message_logs = FALSE;
2128 }
2129 else badarg = TRUE;
2130 break;
2131
2132 /* -bi: This option is used by sendmail to initialize *the* alias file,
2133 though it has the -oA option to specify a different file. Exim has no
2134 concept of *the* alias file, but since Sun's YP make script calls
2135 sendmail this way, some support must be provided. */
2136 case 'i':
2137 if (!*++argrest) bi_option = TRUE;
2138 else badarg = TRUE;
2139 break;
2140
2141 /* -bI: provide information, of the type to follow after a colon.
2142 This is an Exim flag. */
2143 case 'I':
2144 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2145 {
2146 uschar *p = argrest+1;
2147 info_flag = CMDINFO_HELP;
2148 if (Ustrlen(p))
2149 if (strcmpic(p, CUS"sieve") == 0)
2150 {
2151 info_flag = CMDINFO_SIEVE;
2152 info_stdout = TRUE;
2153 }
2154 else if (strcmpic(p, CUS"dscp") == 0)
2155 {
2156 info_flag = CMDINFO_DSCP;
2157 info_stdout = TRUE;
2158 }
2159 else if (strcmpic(p, CUS"help") == 0)
2160 info_stdout = TRUE;
2161 }
2162 else badarg = TRUE;
2163 break;
2164
2165 /* -bm: Accept and deliver message - the default option. Reinstate
2166 receiving_message, which got turned off for all -b options.
2167 -bmalware: test the filename given for malware */
2168 case 'm':
2169 if (!*argrest) receiving_message = TRUE;
2170 else if (Ustrcmp(argrest, "alware") == 0)
2171 {
2172 if (++i >= argc) { badarg = TRUE; break; }
2173 checking = TRUE;
2174 malware_test_file = argv[i];
2175 }
2176 else badarg = TRUE;
2177 break;
2178
2179 /* -bnq: For locally originating messages, do not qualify unqualified
2180 addresses. In the envelope, this causes errors; in header lines they
2181 just get left. */
2182 case 'n':
2183 if (Ustrcmp(argrest, "q") == 0)
2184 {
2185 f.allow_unqualified_sender = FALSE;
2186 f.allow_unqualified_recipient = FALSE;
2187 }
2188 else badarg = TRUE;
2189 break;
2190
2191 /* -bpxx: List the contents of the mail queue, in various forms. If
2192 the option is -bpc, just a queue count is needed. Otherwise, if the
2193 first letter after p is r, then order is random. */
2194 case 'p':
2195 if (*argrest == 'c')
2196 {
2197 count_queue = TRUE;
2198 if (*++argrest) badarg = TRUE;
2199 break;
2200 }
2201
2202 if (*argrest == 'r')
2203 {
2204 list_queue_option = 8;
2205 argrest++;
2206 }
2207 else list_queue_option = 0;
2208
2209 list_queue = TRUE;
2210
2211 /* -bp: List the contents of the mail queue, top-level only */
2212
2213 if (!*argrest) {}
2214
2215 /* -bpu: List the contents of the mail queue, top-level undelivered */
2216
2217 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2218
2219 /* -bpa: List the contents of the mail queue, including all delivered */
2220
2221 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2222
2223 /* Unknown after -bp[r] */
2224
2225 else badarg = TRUE;
2226 break;
2227
2228
2229 /* -bP: List the configuration variables given as the address list.
2230 Force -v, so configuration errors get displayed. */
2231 case 'P':
2232
2233 /* -bP config: we need to setup here, because later,
2234 * when list_options is checked, the config is read already */
2235 if (*argrest)
2236 badarg = TRUE;
2237 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2238 {
2239 list_config = TRUE;
2240 readconf_save_config(version_string);
2241 }
2242 else
2243 {
2244 list_options = TRUE;
2245 debug_selector |= D_v;
2246 debug_file = stderr;
2247 }
2248 break;
2249
2250 /* -brt: Test retry configuration lookup */
2251 case 'r':
2252 if (Ustrcmp(argrest, "t") == 0)
2253 {
2254 checking = TRUE;
2255 test_retry_arg = i + 1;
2256 goto END_ARG;
2257 }
2258
2259 /* -brw: Test rewrite configuration */
2260
2261 else if (Ustrcmp(argrest, "w") == 0)
2262 {
2263 checking = TRUE;
2264 test_rewrite_arg = i + 1;
2265 goto END_ARG;
2266 }
2267 else badarg = TRUE;
2268 break;
2269
2270 /* -bS: Read SMTP commands on standard input, but produce no replies -
2271 all errors are reported by sending messages. */
2272 case 'S':
2273 if (!*argrest)
2274 smtp_input = smtp_batched_input = receiving_message = TRUE;
2275 else badarg = TRUE;
2276 break;
2277
2278 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2279 on standard output. */
2280 case 's':
2281 if (!*argrest) smtp_input = receiving_message = TRUE;
2282 else badarg = TRUE;
2283 break;
2284
2285 /* -bt: address testing mode */
2286 case 't':
2287 if (!*argrest)
2288 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2289 else badarg = TRUE;
2290 break;
2291
2292 /* -bv: verify addresses */
2293 case 'v':
2294 if (!*argrest)
2295 verify_address_mode = checking = f.log_testing_mode = TRUE;
2296
2297 /* -bvs: verify sender addresses */
2298
2299 else if (Ustrcmp(argrest, "s") == 0)
2300 {
2301 verify_address_mode = checking = f.log_testing_mode = TRUE;
2302 verify_as_sender = TRUE;
2303 }
2304 else badarg = TRUE;
2305 break;
2306
2307 /* -bV: Print version string and support details */
2308 case 'V':
2309 if (!*argrest)
2310 {
2311 printf("Exim version %s #%s built %s\n", version_string,
2312 version_cnumber, version_date);
2313 printf("%s\n", CS version_copyright);
2314 version_printed = TRUE;
2315 show_whats_supported(stdout);
2316 f.log_testing_mode = TRUE;
2317 }
2318 else badarg = TRUE;
2319 break;
2320
2321 /* -bw: inetd wait mode, accept a listening socket as stdin */
2322 case 'w':
2323 f.inetd_wait_mode = TRUE;
2324 f.background_daemon = FALSE;
2325 f.daemon_listen = TRUE;
2326 if (*argrest)
2327 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2328 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2329 break;
2330
2331 default:
2332 badarg = TRUE;
2333 break;
2334 }
2335 break;
9ee44efb
PP
2336 }
2337
059ec3d9
PH
2338
2339 /* -C: change configuration file list; ignore if it isn't really
2340 a change! Enforce a prefix check if required. */
2341
2342 case 'C':
2343 if (*argrest == 0)
2344 {
2345 if(++i < argc) argrest = argv[i]; else
2346 { badarg = TRUE; break; }
2347 }
2348 if (Ustrcmp(config_main_filelist, argrest) != 0)
2349 {
2350 #ifdef ALT_CONFIG_PREFIX
2351 int sep = 0;
2352 int len = Ustrlen(ALT_CONFIG_PREFIX);
863bd541 2353 const uschar *list = argrest;
059ec3d9
PH
2354 uschar *filename;
2355 while((filename = string_nextinlist(&list, &sep, big_buffer,
2356 big_buffer_size)) != NULL)
2357 {
2358 if ((Ustrlen(filename) < len ||
2359 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2360 Ustrstr(filename, "/../") != NULL) &&
2361 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
9af3c549 2362 exim_fail("-C Permission denied\n");
059ec3d9
PH
2363 }
2364 #endif
261dc43e
DW
2365 if (real_uid != root_uid)
2366 {
90b6341f 2367 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2368
90b6341f
DW
2369 if (real_uid != exim_uid
2370 #ifdef CONFIGURE_OWNER
2371 && real_uid != config_uid
2372 #endif
2373 )
8768d548 2374 f.trusted_config = FALSE;
261dc43e
DW
2375 else
2376 {
90b6341f 2377 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2378 if (trust_list)
2379 {
2380 struct stat statbuf;
2381
2382 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2383 (statbuf.st_uid != root_uid /* owner not root */
2384 #ifdef CONFIGURE_OWNER
2385 && statbuf.st_uid != config_uid /* owner not the special one */
2386 #endif
2387 ) || /* or */
2388 (statbuf.st_gid != root_gid /* group not root */
2389 #ifdef CONFIGURE_GROUP
2390 && statbuf.st_gid != config_gid /* group not the special one */
2391 #endif
2392 && (statbuf.st_mode & 020) != 0 /* group writeable */
2393 ) || /* or */
2394 (statbuf.st_mode & 2) != 0) /* world writeable */
2395 {
8768d548 2396 f.trusted_config = FALSE;
261dc43e
DW
2397 fclose(trust_list);
2398 }
2399 else
2400 {
2401 /* Well, the trust list at least is up to scratch... */
f3ebb786 2402 rmark reset_point = store_mark();
90b6341f
DW
2403 uschar *trusted_configs[32];
2404 int nr_configs = 0;
261dc43e
DW
2405 int i = 0;
2406
2407 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2408 {
2409 uschar *start = big_buffer, *nl;
2410 while (*start && isspace(*start))
2411 start++;
1e83d68b 2412 if (*start != '/')
261dc43e
DW
2413 continue;
2414 nl = Ustrchr(start, '\n');
2415 if (nl)
2416 *nl = 0;
90b6341f
DW
2417 trusted_configs[nr_configs++] = string_copy(start);
2418 if (nr_configs == 32)
261dc43e
DW
2419 break;
2420 }
2421 fclose(trust_list);
2422
90b6341f 2423 if (nr_configs)
261dc43e
DW
2424 {
2425 int sep = 0;
55414b25 2426 const uschar *list = argrest;
261dc43e 2427 uschar *filename;
8768d548 2428 while (f.trusted_config && (filename = string_nextinlist(&list,
261dc43e
DW
2429 &sep, big_buffer, big_buffer_size)) != NULL)
2430 {
90b6341f 2431 for (i=0; i < nr_configs; i++)
90b6341f 2432 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e 2433 break;
90b6341f 2434 if (i == nr_configs)
261dc43e 2435 {
8768d548 2436 f.trusted_config = FALSE;
261dc43e
DW
2437 break;
2438 }
2439 }
2440 }
f3ebb786 2441 else /* No valid prefixes found in trust_list file. */
8768d548 2442 f.trusted_config = FALSE;
f3ebb786 2443 store_reset(reset_point);
261dc43e
DW
2444 }
2445 }
f3ebb786 2446 else /* Could not open trust_list file. */
8768d548 2447 f.trusted_config = FALSE;
261dc43e
DW
2448 }
2449 #else
2450 /* Not root; don't trust config */
8768d548 2451 f.trusted_config = FALSE;
261dc43e
DW
2452 #endif
2453 }
059ec3d9
PH
2454
2455 config_main_filelist = argrest;
8768d548 2456 f.config_changed = TRUE;
059ec3d9
PH
2457 }
2458 break;
2459
2460
2461 /* -D: set up a macro definition */
2462
2463 case 'D':
9af3c549
JH
2464#ifdef DISABLE_D_OPTION
2465 exim_fail("exim: -D is not available in this Exim binary\n");
2466#else
059ec3d9
PH
2467 {
2468 int ptr = 0;
059ec3d9
PH
2469 macro_item *m;
2470 uschar name[24];
2471 uschar *s = argrest;
2472
4ab69ec7 2473 opt_D_used = TRUE;
059ec3d9
PH
2474 while (isspace(*s)) s++;
2475
2476 if (*s < 'A' || *s > 'Z')
9af3c549 2477 exim_fail("exim: macro name set by -D must start with "
059ec3d9 2478 "an upper case letter\n");
059ec3d9
PH
2479
2480 while (isalnum(*s) || *s == '_')
2481 {
2482 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2483 s++;
2484 }
2485 name[ptr] = 0;
2486 if (ptr == 0) { badarg = TRUE; break; }
2487 while (isspace(*s)) s++;
2488 if (*s != 0)
2489 {
2490 if (*s++ != '=') { badarg = TRUE; break; }
2491 while (isspace(*s)) s++;
2492 }
2493
85e03244 2494 for (m = macros_user; m; m = m->next)
1a7c9a48 2495 if (Ustrcmp(m->name, name) == 0)
9af3c549 2496 exim_fail("exim: duplicated -D in command line\n");
059ec3d9 2497
85e03244 2498 m = macro_create(name, s, TRUE);
059ec3d9
PH
2499
2500 if (clmacro_count >= MAX_CLMACROS)
9af3c549 2501 exim_fail("exim: too many -D options on command line\n");
f3ebb786
JH
2502 clmacros[clmacro_count++] =
2503 string_sprintf("-D%s=%s", m->name, m->replacement);
059ec3d9
PH
2504 }
2505 #endif
2506 break;
2507
2508 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2509 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2510 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2511
2512 case 'd':
2513 if (Ustrcmp(argrest, "ropcr") == 0)
2514 {
2515 /* drop_cr = TRUE; */
2516 }
2517
2518 /* Use an intermediate variable so that we don't set debugging while
2519 decoding the debugging bits. */
2520
2521 else
2522 {
2523 unsigned int selector = D_default;
2524 debug_selector = 0;
2525 debug_file = NULL;
3d235903
PH
2526 if (*argrest == 'd')
2527 {
8768d548 2528 f.debug_daemon = TRUE;
3d235903
PH
2529 argrest++;
2530 }
059ec3d9 2531 if (*argrest != 0)
6c6d6e48
TF
2532 decode_bits(&selector, 1, debug_notall, argrest,
2533 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2534 debug_selector = selector;
2535 }
2536 break;
2537
2538
2539 /* -E: This is a local error message. This option is not intended for
2540 external use at all, but is not restricted to trusted callers because it
2541 does no harm (just suppresses certain error messages) and if Exim is run
2542 not setuid root it won't always be trusted when it generates error
2543 messages using this option. If there is a message id following -E, point
2544 message_reference at it, for logging. */
2545
2546 case 'E':
8768d548 2547 f.local_error_message = TRUE;
059ec3d9
PH
2548 if (mac_ismsgid(argrest)) message_reference = argrest;
2549 break;
2550
2551
2552 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2553 option, so it looks as if historically the -oex options are also callable
2554 without the leading -o. So we have to accept them. Before the switch,
2555 anything starting -oe has been converted to -e. Exim does not support all
2556 of the sendmail error options. */
2557
2558 case 'e':
2559 if (Ustrcmp(argrest, "e") == 0)
2560 {
2561 arg_error_handling = ERRORS_SENDER;
2562 errors_sender_rc = EXIT_SUCCESS;
2563 }
2564 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2565 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2566 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2567 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2568 else badarg = TRUE;
2569 break;
2570
2571
2572 /* -F: Set sender's full name, used instead of the gecos entry from
2573 the password file. Since users can usually alter their gecos entries,
2574 there's no security involved in using this instead. The data can follow
2575 the -F or be in the next argument. */
2576
2577 case 'F':
2578 if (*argrest == 0)
2579 {
2580 if(++i < argc) argrest = argv[i]; else
2581 { badarg = TRUE; break; }
2582 }
2583 originator_name = argrest;
8768d548 2584 f.sender_name_forced = TRUE;
059ec3d9
PH
2585 break;
2586
2587
2588 /* -f: Set sender's address - this value is only actually used if Exim is
2589 run by a trusted user, or if untrusted_set_sender is set and matches the
2590 address, except that the null address can always be set by any user. The
2591 test for this happens later, when the value given here is ignored when not
2592 permitted. For an untrusted user, the actual sender is still put in Sender:
2593 if it doesn't match the From: header (unless no_local_from_check is set).
2594 The data can follow the -f or be in the next argument. The -r switch is an
2595 obsolete form of -f but since there appear to be programs out there that
2596 use anything that sendmail has ever supported, better accept it - the
2597 synonymizing is done before the switch above.
2598
2599 At this stage, we must allow domain literal addresses, because we don't
2600 know what the setting of allow_domain_literals is yet. Ditto for trailing
2601 dots and strip_trailing_dot. */
2602
2603 case 'f':
2604 {
250b6871 2605 int dummy_start, dummy_end;
059ec3d9
PH
2606 uschar *errmess;
2607 if (*argrest == 0)
2608 {
2609 if (i+1 < argc) argrest = argv[++i]; else
2610 { badarg = TRUE; break; }
2611 }
2612 if (*argrest == 0)
f3ebb786 2613 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
059ec3d9
PH
2614 else
2615 {
2616 uschar *temp = argrest + Ustrlen(argrest) - 1;
2617 while (temp >= argrest && isspace(*temp)) temp--;
2618 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2619 allow_domain_literals = TRUE;
2620 strip_trailing_dot = TRUE;
8c5d388a 2621#ifdef SUPPORT_I18N
250b6871
JH
2622 allow_utf8_domains = TRUE;
2623#endif
2624 sender_address = parse_extract_address(argrest, &errmess,
2625 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
f3ebb786 2626 sender_address = string_copy_taint(sender_address, TRUE);
8c5d388a 2627#ifdef SUPPORT_I18N
250b6871
JH
2628 message_smtputf8 = string_is_utf8(sender_address);
2629 allow_utf8_domains = FALSE;
2630#endif
059ec3d9
PH
2631 allow_domain_literals = FALSE;
2632 strip_trailing_dot = FALSE;
9af3c549
JH
2633 if (!sender_address)
2634 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
059ec3d9 2635 }
8768d548 2636 f.sender_address_forced = TRUE;
059ec3d9
PH
2637 }
2638 break;
2639
a3fb9793 2640 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2641 sendmail may complain about problems instead of fixing them.
2642 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2643 not at this time complain about problems. */
059ec3d9
PH
2644
2645 case 'G':
f4ee74ac 2646 flag_G = TRUE;
059ec3d9
PH
2647 break;
2648
2649 /* -h: Set the hop count for an incoming message. Exim does not currently
2650 support this; it always computes it by counting the Received: headers.
2651 To put it in will require a change to the spool header file format. */
2652
2653 case 'h':
2654 if (*argrest == 0)
2655 {
2656 if(++i < argc) argrest = argv[i]; else
2657 { badarg = TRUE; break; }
2658 }
2659 if (!isdigit(*argrest)) badarg = TRUE;
2660 break;
2661
2662
2663 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2664 not to be documented for sendmail but mailx (at least) uses it) */
2665
2666 case 'i':
8768d548 2667 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
059ec3d9
PH
2668 break;
2669
2670
a3fb9793
PP
2671 /* -L: set the identifier used for syslog; equivalent to setting
2672 syslog_processname in the config file, but needs to be an admin option. */
2673
2674 case 'L':
2675 if (*argrest == '\0')
2676 {
2677 if(++i < argc) argrest = argv[i]; else
2678 { badarg = TRUE; break; }
2679 }
9af3c549
JH
2680 if ((sz = Ustrlen(argrest)) > 32)
2681 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
a3fb9793 2682 if (sz < 1)
9af3c549 2683 exim_fail("exim: the -L syslog name is too short\n");
a3fb9793
PP
2684 cmdline_syslog_name = argrest;
2685 break;
2686
059ec3d9
PH
2687 case 'M':
2688 receiving_message = FALSE;
2689
2690 /* -MC: continue delivery of another message via an existing open
2691 file descriptor. This option is used for an internal call by the
2692 smtp transport when there is a pending message waiting to go to an
2693 address to which it has got a connection. Five subsequent arguments are
2694 required: transport name, host name, IP address, sequence number, and
2695 message_id. Transports may decline to create new processes if the sequence
2696 number gets too big. The channel is stdin. This (-MC) must be the last
2697 argument. There's a subsequent check that the real-uid is privileged.
2698
2699 If we are running in the test harness. delay for a bit, to let the process
2700 that set this one up complete. This makes for repeatability of the logging,
2701 etc. output. */
2702
2703 if (Ustrcmp(argrest, "C") == 0)
2704 {
41c7c167
PH
2705 union sockaddr_46 interface_sock;
2706 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2707
059ec3d9 2708 if (argc != i + 6)
9af3c549 2709 exim_fail("exim: too many or too few arguments after -MC\n");
059ec3d9
PH
2710
2711 if (msg_action_arg >= 0)
9af3c549 2712 exim_fail("exim: incompatible arguments\n");
059ec3d9
PH
2713
2714 continue_transport = argv[++i];
2715 continue_hostname = argv[++i];
2716 continue_host_address = argv[++i];
2717 continue_sequence = Uatoi(argv[++i]);
2718 msg_action = MSG_DELIVER;
2719 msg_action_arg = ++i;
2720 forced_delivery = TRUE;
2721 queue_run_pid = passed_qr_pid;
2722 queue_run_pipe = passed_qr_pipe;
2723
2724 if (!mac_ismsgid(argv[i]))
9af3c549 2725 exim_fail("exim: malformed message id %s after -MC option\n",
059ec3d9 2726 argv[i]);
059ec3d9 2727
875512a3
JH
2728 /* Set up $sending_ip_address and $sending_port, unless proxied */
2729
5013d912 2730 if (!continue_proxy_cipher)
875512a3
JH
2731 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2732 &size) == 0)
2733 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2734 &sending_port);
2735 else
9af3c549 2736 exim_fail("exim: getsockname() failed after -MC option: %s\n",
875512a3 2737 strerror(errno));
41c7c167 2738
9f01e50d 2739 testharness_pause_ms(500);
059ec3d9
PH
2740 break;
2741 }
2742
2d14f397
JH
2743 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2744 {
875512a3 2745 switch(argrest[1])
2d14f397 2746 {
059ec3d9
PH
2747 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2748 precedes -MC (see above). The flag indicates that the host to which
2749 Exim is connected has accepted an AUTH sequence. */
2750
8768d548 2751 case 'A': f.smtp_authenticated = TRUE; break;
059ec3d9 2752
6c1c3d1d
WB
2753 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2754 that exim is connected to supports the esmtp extension DSN */
28b3821f 2755
14de8063 2756 case 'D': smtp_peer_options |= OPTION_DSN; break;
6c1c3d1d 2757
e37f8a84 2758 /* -MCG: set the queue name, to a non-default value */
28b3821f 2759
2d14f397
JH
2760 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2761 else badarg = TRUE;
2762 break;
2763
2764 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2765
14de8063 2766 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
28b3821f 2767
059ec3d9
PH
2768 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2769 it preceded -MC (see above) */
2770
14de8063 2771 case 'P': smtp_peer_options |= OPTION_PIPE; break;
059ec3d9
PH
2772
2773 /* -MCQ: pass on the pid of the queue-running process that started
2774 this chain of deliveries and the fd of its synchronizing pipe; this
2775 is useful only when it precedes -MC (see above) */
2776
2d14f397
JH
2777 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2778 else badarg = TRUE;
2779 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2780 else badarg = TRUE;
2781 break;
059ec3d9
PH
2782
2783 /* -MCS: set the smtp_use_size flag; this is useful only when it
2784 precedes -MC (see above) */
2785
14de8063 2786 case 'S': smtp_peer_options |= OPTION_SIZE; break;
059ec3d9 2787
01603eec 2788#ifndef DISABLE_TLS
875512a3 2789 /* -MCt: similar to -MCT below but the connection is still open
aded2255 2790 via a proxy process which handles the TLS context and coding.
5013d912
JH
2791 Require three arguments for the proxied local address and port,
2792 and the TLS cipher. */
875512a3 2793
5013d912 2794 case 't': if (++i < argc) sending_ip_address = argv[i];
875512a3
JH
2795 else badarg = TRUE;
2796 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2797 else badarg = TRUE;
5013d912
JH
2798 if (++i < argc) continue_proxy_cipher = argv[i];
2799 else badarg = TRUE;
875512a3
JH
2800 /*FALLTHROUGH*/
2801
059ec3d9
PH
2802 /* -MCT: set the tls_offered flag; this is useful only when it
2803 precedes -MC (see above). The flag indicates that the host to which
2804 Exim is connected has offered TLS support. */
2805
14de8063 2806 case 'T': smtp_peer_options |= OPTION_TLS; break;
2d14f397
JH
2807#endif
2808
2809 default: badarg = TRUE; break;
2810 }
8ac90765
JH
2811 break;
2812 }
2813
059ec3d9
PH
2814 /* -M[x]: various operations on the following list of message ids:
2815 -M deliver the messages, ignoring next retry times and thawing
2816 -Mc deliver the messages, checking next retry times, no thawing
2817 -Mf freeze the messages
2818 -Mg give up on the messages
2819 -Mt thaw the messages
2820 -Mrm remove the messages
2821 In the above cases, this must be the last option. There are also the
2822 following options which are followed by a single message id, and which
2823 act on that message. Some of them use the "recipient" addresses as well.
2824 -Mar add recipient(s)
2825 -Mmad mark all recipients delivered
2826 -Mmd mark recipients(s) delivered
2827 -Mes edit sender
0ef732d9 2828 -Mset load a message for use with -be
059ec3d9 2829 -Mvb show body
a96603a0 2830 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2831 -Mvh show header
2832 -Mvl show log
2833 */
2834
2835 else if (*argrest == 0)
2836 {
2837 msg_action = MSG_DELIVER;
8768d548 2838 forced_delivery = f.deliver_force_thaw = TRUE;
059ec3d9
PH
2839 }
2840 else if (Ustrcmp(argrest, "ar") == 0)
2841 {
2842 msg_action = MSG_ADD_RECIPIENT;
2843 one_msg_action = TRUE;
2844 }
2845 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2846 else if (Ustrcmp(argrest, "es") == 0)
2847 {
2848 msg_action = MSG_EDIT_SENDER;
2849 one_msg_action = TRUE;
2850 }
2851 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2852 else if (Ustrcmp(argrest, "g") == 0)
2853 {
2854 msg_action = MSG_DELIVER;
2855 deliver_give_up = TRUE;
2856 }
fc7bae7f
JH
2857 else if (Ustrcmp(argrest, "G") == 0)
2858 {
2859 msg_action = MSG_SETQUEUE;
2860 queue_name_dest = argv[++i];
2861 }
059ec3d9
PH
2862 else if (Ustrcmp(argrest, "mad") == 0)
2863 {
2864 msg_action = MSG_MARK_ALL_DELIVERED;
2865 }
2866 else if (Ustrcmp(argrest, "md") == 0)
2867 {
2868 msg_action = MSG_MARK_DELIVERED;
2869 one_msg_action = TRUE;
2870 }
2871 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2872 else if (Ustrcmp(argrest, "set") == 0)
2873 {
2874 msg_action = MSG_LOAD;
2875 one_msg_action = TRUE;
2876 }
059ec3d9
PH
2877 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2878 else if (Ustrcmp(argrest, "vb") == 0)
2879 {
2880 msg_action = MSG_SHOW_BODY;
2881 one_msg_action = TRUE;
2882 }
a96603a0
PH
2883 else if (Ustrcmp(argrest, "vc") == 0)
2884 {
2885 msg_action = MSG_SHOW_COPY;
2886 one_msg_action = TRUE;
2887 }
059ec3d9
PH
2888 else if (Ustrcmp(argrest, "vh") == 0)
2889 {
2890 msg_action = MSG_SHOW_HEADER;
2891 one_msg_action = TRUE;
2892 }
2893 else if (Ustrcmp(argrest, "vl") == 0)
2894 {
2895 msg_action = MSG_SHOW_LOG;
2896 one_msg_action = TRUE;
2897 }
2898 else { badarg = TRUE; break; }
2899
2900 /* All the -Mxx options require at least one message id. */
2901
2902 msg_action_arg = i + 1;
2903 if (msg_action_arg >= argc)
9af3c549 2904 exim_fail("exim: no message ids given after %s option\n", arg);
059ec3d9
PH
2905
2906 /* Some require only message ids to follow */
2907
2908 if (!one_msg_action)
2909 {
d7978c0f 2910 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
9af3c549 2911 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2912 argv[j], arg);
059ec3d9
PH
2913 goto END_ARG; /* Remaining args are ids */
2914 }
2915
2916 /* Others require only one message id, possibly followed by addresses,
2917 which will be handled as normal arguments. */
2918
2919 else
2920 {
2921 if (!mac_ismsgid(argv[msg_action_arg]))
9af3c549 2922 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2923 argv[msg_action_arg], arg);
059ec3d9
PH
2924 i++;
2925 }
2926 break;
2927
2928
2929 /* Some programs seem to call the -om option without the leading o;
2930 for sendmail it askes for "me too". Exim always does this. */
2931
2932 case 'm':
2933 if (*argrest != 0) badarg = TRUE;
2934 break;
2935
2936
2937 /* -N: don't do delivery - a debugging option that stops transports doing
2938 their thing. It implies debugging at the D_v level. */
2939
2940 case 'N':
2941 if (*argrest == 0)
2942 {
8768d548 2943 f.dont_deliver = TRUE;
059ec3d9
PH
2944 debug_selector |= D_v;
2945 debug_file = stderr;
2946 }
2947 else badarg = TRUE;
2948 break;
2949
2950
12f69989
PP
2951 /* -n: This means "don't alias" in sendmail, apparently.
2952 For normal invocations, it has no effect.
2953 It may affect some other options. */
059ec3d9
PH
2954
2955 case 'n':
12f69989 2956 flag_n = TRUE;
059ec3d9
PH
2957 break;
2958
2959 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2960 option to the specified value. This form uses long names. We need to handle
2961 -O option=value and -Ooption=value. */
2962
2963 case 'O':
2964 if (*argrest == 0)
059ec3d9 2965 if (++i >= argc)
9af3c549 2966 exim_fail("exim: string expected after -O\n");
059ec3d9
PH
2967 break;
2968
2969 case 'o':
777cc748 2970 switch (*argrest++)
059ec3d9 2971 {
777cc748
JH
2972 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2973 file" option). */
2974 case 'A':
2975 if (!*(alias_arg = argrest))
2976 if (i+1 < argc) alias_arg = argv[++i];
2977 else exim_fail("exim: string expected after -oA\n");
2978 break;
2979
2980 /* -oB: Set a connection message max value for remote deliveries */
2981 case 'B':
2982 {
2983 uschar * p = argrest;
2984 if (!*p)
2985 if (i+1 < argc && isdigit((argv[i+1][0])))
2986 p = argv[++i];
2987 else
2988 {
2989 connection_max_messages = 1;
2990 p = NULL;
2991 }
059ec3d9 2992
777cc748
JH
2993 if (p)
2994 {
2995 if (!isdigit(*p))
2996 exim_fail("exim: number expected after -oB\n");
2997 connection_max_messages = Uatoi(p);
2998 }
2999 }
3000 break;
3001
3002 /* -odb: background delivery */
3003
3004 case 'd':
3005 if (Ustrcmp(argrest, "b") == 0)
3006 {
3007 f.synchronous_delivery = FALSE;
3008 arg_queue_only = FALSE;
3009 queue_only_set = TRUE;
3010 }
3011
ff966302
JH
3012 /* -odd: testsuite-only: add no inter-process delays */
3013
3014 else if (Ustrcmp(argrest, "d") == 0)
3015 f.testsuite_delays = FALSE;
3016
777cc748
JH
3017 /* -odf: foreground delivery (smail-compatible option); same effect as
3018 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3019 */
3020
3021 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3022 {
3023 f.synchronous_delivery = TRUE;
3024 arg_queue_only = FALSE;
3025 queue_only_set = TRUE;
3026 }
3027
3028 /* -odq: queue only */
3029
3030 else if (Ustrcmp(argrest, "q") == 0)
3031 {
3032 f.synchronous_delivery = FALSE;
3033 arg_queue_only = TRUE;
3034 queue_only_set = TRUE;
3035 }
3036
3037 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3038 but no remote delivery */
3039
3040 else if (Ustrcmp(argrest, "qs") == 0)
3041 {
3042 f.queue_smtp = TRUE;
3043 arg_queue_only = FALSE;
3044 queue_only_set = TRUE;
3045 }
3046 else badarg = TRUE;
3047 break;
3048
3049 /* -oex: Sendmail error flags. As these are also accepted without the
3050 leading -o prefix, for compatibility with vacation and other callers,
3051 they are handled with -e above. */
3052
3053 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3054 -oitrue: Another sendmail syntax for the same */
3055
3056 case 'i':
3057 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3058 f.dot_ends = FALSE;
3059 else badarg = TRUE;
3060 break;
059ec3d9
PH
3061
3062 /* -oM*: Set various characteristics for an incoming message; actually
3063 acted on for trusted callers only. */
3064
777cc748
JH
3065 case 'M':
3066 {
3067 if (i+1 >= argc)
3068 exim_fail("exim: data expected after -oM%s\n", argrest);
059ec3d9 3069
777cc748 3070 /* -oMa: Set sender host address */
059ec3d9 3071
777cc748 3072 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
059ec3d9 3073
777cc748 3074 /* -oMaa: Set authenticator name */
059ec3d9 3075
777cc748
JH
3076 else if (Ustrcmp(argrest, "aa") == 0)
3077 sender_host_authenticated = argv[++i];
059ec3d9 3078
777cc748 3079 /* -oMas: setting authenticated sender */
059ec3d9 3080
777cc748
JH
3081 else if (Ustrcmp(argrest, "as") == 0)
3082 authenticated_sender = string_copy_taint(argv[++i], TRUE);
059ec3d9 3083
777cc748 3084 /* -oMai: setting authenticated id */
059ec3d9 3085
777cc748
JH
3086 else if (Ustrcmp(argrest, "ai") == 0)
3087 authenticated_id = string_copy_taint(argv[++i], TRUE);
059ec3d9 3088
777cc748 3089 /* -oMi: Set incoming interface address */
d2af03f4 3090
777cc748 3091 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
d2af03f4 3092
777cc748 3093 /* -oMm: Message reference */
059ec3d9 3094
777cc748
JH
3095 else if (Ustrcmp(argrest, "m") == 0)
3096 {
3097 if (!mac_ismsgid(argv[i+1]))
3098 exim_fail("-oMm must be a valid message ID\n");
3099 if (!f.trusted_config)
3100 exim_fail("-oMm must be called by a trusted user/config\n");
3101 message_reference = argv[++i];
3102 }
059ec3d9 3103
777cc748 3104 /* -oMr: Received protocol */
059ec3d9 3105
777cc748 3106 else if (Ustrcmp(argrest, "r") == 0)
059ec3d9 3107
777cc748
JH
3108 if (received_protocol)
3109 exim_fail("received_protocol is set already\n");
3110 else
3111 received_protocol = argv[++i];
059ec3d9 3112
777cc748 3113 /* -oMs: Set sender host name */
059ec3d9 3114
777cc748
JH
3115 else if (Ustrcmp(argrest, "s") == 0)
3116 sender_host_name = string_copy_taint(argv[++i], TRUE);
059ec3d9 3117
777cc748 3118 /* -oMt: Set sender ident */
059ec3d9 3119
777cc748
JH
3120 else if (Ustrcmp(argrest, "t") == 0)
3121 {
3122 sender_ident_set = TRUE;
3123 sender_ident = argv[++i];
3124 }
059ec3d9 3125
777cc748 3126 /* Else a bad argument */
059ec3d9 3127
777cc748
JH
3128 else
3129 badarg = TRUE;
3130 }
3131 break;
3132
3133 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3134 seem to call this as -m (undocumented), so that is also accepted (see
3135 above). */
3136 /* -oo: An ancient flag for old-style addresses which still seems to
3137 crop up in some calls (see in SCO). */
3138
3139 case 'm':
3140 case 'o':
305e4fae 3141 if (*argrest) badarg = TRUE;
777cc748
JH
3142 break;
3143
3144 /* -oP <name>: set pid file path for daemon
3145 -oPX: delete pid file of daemon */
3146
3147 case 'P':
3148 if (!*argrest) override_pid_file_path = argv[++i];
3149 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3150 else badarg = TRUE;
3151 break;
3152
3153
3154 /* -or <n>: set timeout for non-SMTP acceptance
3155 -os <n>: set timeout for SMTP acceptance */
3156
3157 case 'r':
3158 case 's':
305e4fae
HSHR
3159 {
3160 int * tp = argrest[-1] == 'r'
3161 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3162 if (*argrest)
3163 *tp = readconf_readtime(argrest, 0, FALSE);
3164 else if (i+1 < argc)
3165 *tp = readconf_readtime(argv[++i], 0, FALSE);
3166
3167 if (*tp < 0)
3168 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3169 }
777cc748 3170 break;
059ec3d9 3171
777cc748 3172 /* -oX <list>: Override local_interfaces and/or default daemon ports */
059ec3d9 3173
777cc748 3174 case 'X':
305e4fae
HSHR
3175 if (*argrest) badarg = TRUE;
3176 else override_local_interfaces = argv[++i];
777cc748 3177 break;
01446a56 3178
777cc748 3179 /* Unknown -o argument */
059ec3d9 3180
777cc748
JH
3181 default:
3182 badarg = TRUE;
059ec3d9 3183 }
059ec3d9
PH
3184 break;
3185
3186
3187 /* -ps: force Perl startup; -pd force delayed Perl startup */
3188
3189 case 'p':
3190 #ifdef EXIM_PERL
3191 if (*argrest == 's' && argrest[1] == 0)
3192 {
3193 perl_start_option = 1;
3194 break;
3195 }
3196 if (*argrest == 'd' && argrest[1] == 0)
3197 {
3198 perl_start_option = -1;
3199 break;
3200 }
3201 #endif
3202
3203 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3204 which sets the host protocol and host name */
3205
3206 if (*argrest == 0)
5bfe3b35
JH
3207 if (i+1 < argc)
3208 argrest = argv[++i];
3209 else
059ec3d9 3210 { badarg = TRUE; break; }
059ec3d9
PH
3211
3212 if (*argrest != 0)
3213 {
65e061b7
HSHR
3214 uschar *hn;
3215
3216 if (received_protocol)
9af3c549 3217 exim_fail("received_protocol is set already\n");
65e061b7
HSHR
3218
3219 hn = Ustrchr(argrest, ':');
059ec3d9 3220 if (hn == NULL)
059ec3d9 3221 received_protocol = argrest;
059ec3d9
PH
3222 else
3223 {
90341c71
JH
3224 int old_pool = store_pool;
3225 store_pool = POOL_PERM;
059ec3d9 3226 received_protocol = string_copyn(argrest, hn - argrest);
90341c71 3227 store_pool = old_pool;
059ec3d9
PH
3228 sender_host_name = hn + 1;
3229 }
3230 }
3231 break;
3232
3233
3234 case 'q':
3235 receiving_message = FALSE;
3cc66b45 3236 if (queue_interval >= 0)
9af3c549 3237 exim_fail("exim: -q specified more than once\n");
059ec3d9
PH
3238
3239 /* -qq...: Do queue runs in a 2-stage manner */
3240
3241 if (*argrest == 'q')
3242 {
8768d548 3243 f.queue_2stage = TRUE;
059ec3d9
PH
3244 argrest++;
3245 }
3246
3247 /* -qi...: Do only first (initial) deliveries */
3248
3249 if (*argrest == 'i')
3250 {
8768d548 3251 f.queue_run_first_delivery = TRUE;
059ec3d9
PH
3252 argrest++;
3253 }
3254
3255 /* -qf...: Run the queue, forcing deliveries
3256 -qff..: Ditto, forcing thawing as well */
3257
3258 if (*argrest == 'f')
3259 {
8768d548 3260 f.queue_run_force = TRUE;
55e70e76 3261 if (*++argrest == 'f')
059ec3d9 3262 {
8768d548 3263 f.deliver_force_thaw = TRUE;
059ec3d9
PH
3264 argrest++;
3265 }
3266 }
3267
3268 /* -q[f][f]l...: Run the queue only on local deliveries */
3269
3270 if (*argrest == 'l')
3271 {
8768d548 3272 f.queue_run_local = TRUE;
059ec3d9
PH
3273 argrest++;
3274 }
3275
55e70e76 3276 /* -q[f][f][l][G<name>]... Work on the named queue */
28b3821f
JH
3277
3278 if (*argrest == 'G')
3279 {
fa665e0b
JH
3280 int i;
3281 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3282 queue_name = string_copyn(argrest, i);
3283 argrest += i;
3284 if (*argrest == '/') argrest++;
28b3821f
JH
3285 }
3286
3287 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3288 only, optionally named, optionally starting from a given message id. */
059ec3d9 3289
e5903596
JH
3290 if (!(list_queue || count_queue))
3291 if (*argrest == 0
3292 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3293 {
3294 queue_interval = 0;
3295 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3296 start_queue_run_id = argv[++i];
3297 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3298 stop_queue_run_id = argv[++i];
3299 }
059ec3d9 3300
fa665e0b
JH
3301 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3302 forced, optionally local only, optionally named. */
059ec3d9 3303
e5903596
JH
3304 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3305 0, FALSE)) <= 0)
3306 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
059ec3d9
PH
3307 break;
3308
3309
3310 case 'R': /* Synonymous with -qR... */
3311 receiving_message = FALSE;
3312
3313 /* -Rf: As -R (below) but force all deliveries,
3314 -Rff: Ditto, but also thaw all frozen messages,
3315 -Rr: String is regex
3316 -Rrf: Regex and force
3317 -Rrff: Regex and force and thaw
3318
3319 in all cases provided there are no further characters in this
3320 argument. */
3321
3322 if (*argrest != 0)
d7978c0f 3323 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3324 if (Ustrcmp(argrest, rsopts[i]) == 0)
3325 {
8768d548
JH
3326 if (i != 2) f.queue_run_force = TRUE;
3327 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3328 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3329 argrest += Ustrlen(rsopts[i]);
3330 }
059ec3d9
PH
3331
3332 /* -R: Set string to match in addresses for forced queue run to
3333 pick out particular messages. */
3334
55e70e76
JH
3335 if (*argrest)
3336 deliver_selectstring = argrest;
3337 else if (i+1 < argc)
3338 deliver_selectstring = argv[++i];
3339 else
9af3c549 3340 exim_fail("exim: string expected after -R\n");
059ec3d9
PH
3341 break;
3342
3343
3344 /* -r: an obsolete synonym for -f (see above) */
3345
3346
3347 /* -S: Like -R but works on sender. */
3348
3349 case 'S': /* Synonymous with -qS... */
3350 receiving_message = FALSE;
3351
3352 /* -Sf: As -S (below) but force all deliveries,
3353 -Sff: Ditto, but also thaw all frozen messages,
3354 -Sr: String is regex
3355 -Srf: Regex and force
3356 -Srff: Regex and force and thaw
3357
3358 in all cases provided there are no further characters in this
3359 argument. */
3360
55e70e76 3361 if (*argrest)
d7978c0f 3362 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3363 if (Ustrcmp(argrest, rsopts[i]) == 0)
3364 {
8768d548
JH
3365 if (i != 2) f.queue_run_force = TRUE;
3366 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3367 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3368 argrest += Ustrlen(rsopts[i]);
3369 }
059ec3d9
PH
3370
3371 /* -S: Set string to match in addresses for forced queue run to
3372 pick out particular messages. */
3373
55e70e76
JH
3374 if (*argrest)
3375 deliver_selectstring_sender = argrest;
3376 else if (i+1 < argc)
3377 deliver_selectstring_sender = argv[++i];
3378 else
9af3c549 3379 exim_fail("exim: string expected after -S\n");
059ec3d9
PH
3380 break;
3381
3382 /* -Tqt is an option that is exclusively for use by the testing suite.
3383 It is not recognized in other circumstances. It allows for the setting up
3384 of explicit "queue times" so that various warning/retry things can be
3385 tested. Otherwise variability of clock ticks etc. cause problems. */
3386
3387 case 'T':
8768d548 3388 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
059ec3d9
PH
3389 fudged_queue_times = argv[++i];
3390 else badarg = TRUE;
3391 break;
3392
3393
3394 /* -t: Set flag to extract recipients from body of message. */
3395
3396 case 't':
3397 if (*argrest == 0) extract_recipients = TRUE;
3398
3399 /* -ti: Set flag to extract recipients from body of message, and also
3400 specify that dot does not end the message. */
3401
3402 else if (Ustrcmp(argrest, "i") == 0)
3403 {
3404 extract_recipients = TRUE;
8768d548 3405 f.dot_ends = FALSE;
059ec3d9
PH
3406 }
3407
3408 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3409
01603eec 3410 #ifndef DISABLE_TLS
817d9f57 3411 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3412 #endif
3413
3414 else badarg = TRUE;
3415 break;
3416
3417
3418 /* -U: This means "initial user submission" in sendmail, apparently. The
3419 doc claims that in future sendmail may refuse syntactically invalid
3420 messages instead of fixing them. For the moment, we just ignore it. */
3421
3422 case 'U':
3423 break;
3424
3425
3426 /* -v: verify things - this is a very low-level debugging */
3427
3428 case 'v':
3429 if (*argrest == 0)
3430 {
3431 debug_selector |= D_v;
3432 debug_file = stderr;
3433 }
3434 else badarg = TRUE;
3435 break;
3436
3437
3438 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3439
3440 The -x flag tells the sendmail command that mail from a local
3441 mail program has National Language Support (NLS) extended characters
3442 in the body of the mail item. The sendmail command can send mail with
3443 extended NLS characters across networks that normally corrupts these
3444 8-bit characters.
3445
3446 As Exim is 8-bit clean, it just ignores this flag. */
3447
3448 case 'x':
3449 if (*argrest != 0) badarg = TRUE;
3450 break;
3451
a3fb9793
PP
3452 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3453 logs to that file. We swallow the parameter and otherwise ignore it. */
3454
3455 case 'X':
3456 if (*argrest == '\0')
a3fb9793 3457 if (++i >= argc)
9af3c549 3458 exim_fail("exim: string expected after -X\n");
0ad2e0fc
JH
3459 break;
3460
3461 case 'z':
3462 if (*argrest == '\0')
9af3c549
JH
3463 if (++i < argc)
3464 log_oneline = argv[i];
3465 else
3466 exim_fail("exim: file name expected after %s\n", argv[i-1]);
a3fb9793
PP
3467 break;
3468
059ec3d9
PH
3469 /* All other initial characters are errors */
3470
3471 default:
3472 badarg = TRUE;
3473 break;
3474 } /* End of high-level switch statement */
3475
3476 /* Failed to recognize the option, or syntax error */
3477
3478 if (badarg)
9af3c549 3479 exim_fail("exim abandoned: unknown, malformed, or incomplete "
059ec3d9 3480 "option %s\n", arg);
059ec3d9
PH
3481 }
3482
3483
3cc66b45
PH
3484/* If -R or -S have been specified without -q, assume a single queue run. */
3485
55e70e76
JH
3486if ( (deliver_selectstring || deliver_selectstring_sender)
3487 && queue_interval < 0)
3488 queue_interval = 0;
3cc66b45
PH
3489
3490
059ec3d9 3491END_ARG:
81ea09ca
NM
3492/* If usage_wanted is set we call the usage function - which never returns */
3493if (usage_wanted) exim_usage(called_as);
3494
3495/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3496if ((
3497 (smtp_input || extract_recipients || recipients_arg < argc) &&
8768d548 3498 (f.daemon_listen || queue_interval >= 0 || bi_option ||
059ec3d9 3499 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3500 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3501 ) ||
3502 (
3503 msg_action_arg > 0 &&
8768d548 3504 (f.daemon_listen || queue_interval > 0 || list_options ||
0ef732d9
PH
3505 (checking && msg_action != MSG_LOAD) ||
3506 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3507 ) ||
3508 (
8768d548 3509 (f.daemon_listen || queue_interval > 0) &&
059ec3d9 3510 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3511 bi_option)
059ec3d9
PH
3512 ) ||
3513 (
8768d548 3514 f.daemon_listen && queue_interval == 0
059ec3d9
PH
3515 ) ||
3516 (
8768d548 3517 f.inetd_wait_mode && queue_interval >= 0
9ee44efb
PP
3518 ) ||
3519 (
059ec3d9
PH
3520 list_options &&
3521 (checking || smtp_input || extract_recipients ||
f05da2e8 3522 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3523 ) ||
3524 (
3525 verify_address_mode &&
8768d548 3526 (f.address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3527 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3528 ) ||
3529 (
8768d548 3530 f.address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3531 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3532 ) ||
3533 (
f05da2e8 3534 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3535 extract_recipients)
3536 ) ||
3537 (
3538 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3539 ) ||
3540 (
3541 msg_action == MSG_LOAD &&
3542 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3543 )
3544 )
9af3c549 3545 exim_fail("exim: incompatible command-line options or arguments\n");
059ec3d9
PH
3546
3547/* If debugging is set up, set the file and the file descriptor to pass on to
3548child processes. It should, of course, be 2 for stderr. Also, force the daemon
3549to run in the foreground. */
3550
3551if (debug_selector != 0)
3552 {
3553 debug_file = stderr;
3554 debug_fd = fileno(debug_file);
8768d548 3555 f.background_daemon = FALSE;
9f01e50d 3556 testharness_pause_ms(100); /* lets caller finish */
059ec3d9
PH
3557 if (debug_selector != D_v) /* -v only doesn't show this */
3558 {
3559 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3560 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3561 debug_selector);
6545de78
PP
3562 if (!version_printed)
3563 show_whats_supported(stderr);
059ec3d9
PH
3564 }
3565 }
3566
3567/* When started with root privilege, ensure that the limits on the number of
3568open files and the number of processes (where that is accessible) are
3569sufficiently large, or are unset, in case Exim has been called from an
3570environment where the limits are screwed down. Not all OS have the ability to
3571change some of these limits. */
3572
3573if (unprivileged)
3574 {
3575 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3576 }
3577else
3578 {
3579 struct rlimit rlp;
3580
3581 #ifdef RLIMIT_NOFILE
3582 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3583 {
3584 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3585 strerror(errno));
3586 rlp.rlim_cur = rlp.rlim_max = 0;
3587 }
eb2c0248
PH
3588
3589 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3590 be exceeded. It turns out that some older OS have a fixed upper limit of
3591 256. */
eb2c0248 3592
059ec3d9
PH
3593 if (rlp.rlim_cur < 1000)
3594 {
3595 rlp.rlim_cur = rlp.rlim_max = 1000;
3596 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3597 {
a494b1e1
PH
3598 rlp.rlim_cur = rlp.rlim_max = 256;
3599 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3600 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3601 strerror(errno));
eb2c0248 3602 }
059ec3d9
PH
3603 }
3604 #endif
3605
3606 #ifdef RLIMIT_NPROC
3607 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3608 {
3609 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3610 strerror(errno));
3611 rlp.rlim_cur = rlp.rlim_max = 0;
3612 }
3613
3614 #ifdef RLIM_INFINITY
3615 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3616 {
3617 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3618 #else
3619 if (rlp.rlim_cur < 1000)
3620 {
3621 rlp.rlim_cur = rlp.rlim_max = 1000;
3622 #endif
3623 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3624 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3625 strerror(errno));
3626 }
3627 #endif
3628 }
3629
3630/* Exim is normally entered as root (but some special configurations are
3631possible that don't do this). However, it always spins off sub-processes that
3632set their uid and gid as required for local delivery. We don't want to pass on
3633any extra groups that root may belong to, so we want to get rid of them all at
3634this point.
3635
3636We need to obey setgroups() at this stage, before possibly giving up root
3637privilege for a changed configuration file, but later on we might need to
3638check on the additional groups for the admin user privilege - can't do that
3639till after reading the config, which might specify the exim gid. Therefore,
3640save the group list here first. */
3641
157d73b5 3642if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
9af3c549 3643 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
059ec3d9
PH
3644
3645/* There is a fundamental difference in some BSD systems in the matter of
3646groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3647known not to be different. On the "different" systems there is a single group
3648list, and the first entry in it is the current group. On all other versions of
3649Unix there is a supplementary group list, which is in *addition* to the current
3650group. Consequently, to get rid of all extraneous groups on a "standard" system
3651you pass over 0 groups to setgroups(), while on a "different" system you pass
3652over a single group - the current group, which is always the first group in the
3653list. Calling setgroups() with zero groups on a "different" system results in
3654an error return. The following code should cope with both types of system.
3655
3b7ac02c
JH
3656 Unfortunately, recent MacOS, which shoul