debug tidying
[exim.git] / src / src / exim.c
CommitLineData
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1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
f9ba5e22 5/* Copyright (c) University of Cambridge 1995 - 2018 */
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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__)
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16# include <gnu/libc-version.h>
17#endif
18
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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
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26#ifndef _TIME_H
27# include <time.h>
28#endif
29
6545de78
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30extern void init_lookup_list(void);
31
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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{
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49/* For now, regard all RE results as potentially tainted. We might need
50more intelligence on this point. */
51return store_get((int)size, TRUE);
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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
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78
79
80
81
82/*************************************************
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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)
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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);
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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)
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145{
146int ovector[3*(EXPAND_MAXN+1)];
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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));
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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];
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158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
159 }
160 expand_nmax--;
161 }
162return yield;
163}
164
165
166
167
168/*************************************************
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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{
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182gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
183gstring * g;
184int len;
921b12ca 185va_list ap;
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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))
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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;
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198DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
199va_end(ap);
200}
201
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202/***********************************************
203* Handler for SIGTERM *
204***********************************************/
921b12ca 205
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206static void
207term_handler(int sig)
208{
01446a56 209exit(1);
830832c9 210}
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211
212
213/*************************************************
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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
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222This function takes care to be signal-safe.
223
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224Argument: the signal number (SIGUSR1)
225Returns: nothing
226*/
227
228static void
229usr1_handler(int sig)
230{
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231int fd;
232
233os_restarting_signal(sig, usr1_handler);
234
cab0c277 235if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
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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);
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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
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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
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300require revisiting as hardware advances. This avoids the issue of
301a zero-valued timer setting meaning "never fire".
302
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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;
3a2adc82 312int save_errno = errno;
0f8ba377 313
6906c131 314if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
0f8ba377 315 return;
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316(void)sigemptyset(&sigmask); /* Empty mask */
317(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 319if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
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320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
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322(void)sigfillset(&sigmask); /* All signals */
323(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324(void)sigsuspend(&sigmask); /* Until SIGALRM */
325(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
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326errno = save_errno;
327sigalrm_seen = FALSE;
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328}
329
330
331
332
333/*************************************************
334* Millisecond sleep function *
335*************************************************/
336
337/* The basic sleep() function has a granularity of 1 second, which is too rough
338in some cases - for example, when using an increasing delay to slow down
339spammers.
340
341Argument: number of millseconds
342Returns: nothing
343*/
344
345void
346millisleep(int msec)
347{
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348struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
059ec3d9
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351milliwait(&itval);
352}
353
354
355
356/*************************************************
357* Compare microsecond times *
358*************************************************/
359
360/*
361Arguments:
362 tv1 the first time
363 tv2 the second time
364
365Returns: -1, 0, or +1
366*/
367
32dfdf8b 368static int
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369exim_tvcmp(struct timeval *t1, struct timeval *t2)
370{
371if (t1->tv_sec > t2->tv_sec) return +1;
372if (t1->tv_sec < t2->tv_sec) return -1;
373if (t1->tv_usec > t2->tv_usec) return +1;
374if (t1->tv_usec < t2->tv_usec) return -1;
375return 0;
376}
377
378
379
380
381/*************************************************
382* Clock tick wait function *
383*************************************************/
384
6906c131
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385#ifdef _POSIX_MONOTONIC_CLOCK
386/* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
387static struct timespec offset_ts;
388
389static void
390exim_clock_init(void)
391{
392struct timeval tv;
393if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
394(void)gettimeofday(&tv, NULL);
395offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
396offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
397if (offset_ts.tv_nsec >= 0) return;
398offset_ts.tv_sec--;
399offset_ts.tv_nsec += 1000*1000*1000;
400}
401#endif
402
403
059ec3d9
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404/* Exim uses a time + a pid to generate a unique identifier in two places: its
405message IDs, and in file names for maildir deliveries. Because some OS now
406re-use pids within the same second, sub-second times are now being used.
4c04137d 407However, for absolute certainty, we must ensure the clock has ticked before
059ec3d9
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408allowing the relevant process to complete. At the time of implementation of
409this code (February 2003), the speed of processors is such that the clock will
410invariably have ticked already by the time a process has done its job. This
411function prepares for the time when things are faster - and it also copes with
412clocks that go backwards.
413
414Arguments:
6906c131 415 tgt_tv A timeval which was used to create uniqueness; its usec field
059ec3d9
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416 has been rounded down to the value of the resolution.
417 We want to be sure the current time is greater than this.
418 resolution The resolution that was used to divide the microseconds
419 (1 for maildir, larger for message ids)
420
421Returns: nothing
422*/
423
424void
6906c131 425exim_wait_tick(struct timeval * tgt_tv, int resolution)
059ec3d9
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426{
427struct timeval now_tv;
428long int now_true_usec;
429
6906c131
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430#ifdef _POSIX_MONOTONIC_CLOCK
431struct timespec now_ts;
432
433if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
434 {
435 now_ts.tv_sec += offset_ts.tv_sec;
436 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
437 {
438 now_ts.tv_sec++;
439 now_ts.tv_nsec -= 1000*1000*1000;
440 }
441 now_tv.tv_sec = now_ts.tv_sec;
442 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
443 now_tv.tv_usec = now_true_usec;
444 }
445else
446#endif
447 {
448 (void)gettimeofday(&now_tv, NULL);
449 now_true_usec = now_tv.tv_usec;
450 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
451 }
059ec3d9 452
6906c131 453while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
059ec3d9
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454 {
455 struct itimerval itval;
456 itval.it_interval.tv_sec = 0;
457 itval.it_interval.tv_usec = 0;
6906c131
JH
458 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
459 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
059ec3d9
PH
460
461 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
462 negative value for the microseconds is possible only in the case when "now"
6906c131 463 is more than a second less than "tgt". That means that itval.it_value.tv_sec
059ec3d9
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464 is greater than zero. The following correction is therefore safe. */
465
466 if (itval.it_value.tv_usec < 0)
467 {
468 itval.it_value.tv_usec += 1000000;
469 itval.it_value.tv_sec -= 1;
470 }
471
472 DEBUG(D_transport|D_receive)
473 {
8768d548 474 if (!f.running_in_test_harness)
059ec3d9 475 {
d0291a0a 476 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
6906c131 477 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
7437665e 478 now_tv.tv_sec, (long) now_tv.tv_usec);
6906c131 479 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
d0291a0a 480 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
059ec3d9
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481 }
482 }
483
484 milliwait(&itval);
fce5c23c
ST
485
486 /* Be prapared to go around if the kernel does not implement subtick
487 granularity (GNU Hurd) */
488
489 (void)gettimeofday(&now_tv, NULL);
490 now_true_usec = now_tv.tv_usec;
491 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
059ec3d9
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492 }
493}
494
495
496
497
498/*************************************************
2632889e
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499* Call fopen() with umask 777 and adjust mode *
500*************************************************/
501
502/* Exim runs with umask(0) so that files created with open() have the mode that
503is specified in the open() call. However, there are some files, typically in
504the spool directory, that are created with fopen(). They end up world-writeable
505if no precautions are taken. Although the spool directory is not accessible to
506the world, this is an untidiness. So this is a wrapper function for fopen()
507that sorts out the mode of the created file.
508
509Arguments:
510 filename the file name
511 options the fopen() options
512 mode the required mode
513
514Returns: the fopened FILE or NULL
515*/
516
517FILE *
1ba28e2b 518modefopen(const uschar *filename, const char *options, mode_t mode)
2632889e 519{
67d175de
PH
520mode_t saved_umask = umask(0777);
521FILE *f = Ufopen(filename, options);
522(void)umask(saved_umask);
2632889e
PH
523if (f != NULL) (void)fchmod(fileno(f), mode);
524return f;
525}
526
527
2632889e 528/*************************************************
059ec3d9
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529* Ensure stdin, stdout, and stderr exist *
530*************************************************/
531
532/* Some operating systems grumble if an exec() happens without a standard
533input, output, and error (fds 0, 1, 2) being defined. The worry is that some
534file will be opened and will use these fd values, and then some other bit of
535code will assume, for example, that it can write error messages to stderr.
536This function ensures that fds 0, 1, and 2 are open if they do not already
537exist, by connecting them to /dev/null.
538
539This function is also used to ensure that std{in,out,err} exist at all times,
540so that if any library that Exim calls tries to use them, it doesn't crash.
541
542Arguments: None
543Returns: Nothing
544*/
545
546void
547exim_nullstd(void)
548{
059ec3d9
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549int devnull = -1;
550struct stat statbuf;
d7978c0f 551for (int i = 0; i <= 2; i++)
059ec3d9
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552 {
553 if (fstat(i, &statbuf) < 0 && errno == EBADF)
554 {
555 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
556 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
f3ebb786 557 string_open_failed(errno, "/dev/null", NULL));
1fe64dcc 558 if (devnull != i) (void)dup2(devnull, i);
059ec3d9
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559 }
560 }
1fe64dcc 561if (devnull > 2) (void)close(devnull);
059ec3d9
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562}
563
564
565
566
567/*************************************************
568* Close unwanted file descriptors for delivery *
569*************************************************/
570
571/* This function is called from a new process that has been forked to deliver
572an incoming message, either directly, or using exec.
573
574We want any smtp input streams to be closed in this new process. However, it
575has been observed that using fclose() here causes trouble. When reading in -bS
576input, duplicate copies of messages have been seen. The files will be sharing a
577file pointer with the parent process, and it seems that fclose() (at least on
578some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
579least sometimes. Hence we go for closing the underlying file descriptors.
580
581If TLS is active, we want to shut down the TLS library, but without molesting
582the parent's SSL connection.
583
584For delivery of a non-SMTP message, we want to close stdin and stdout (and
585stderr unless debugging) because the calling process might have set them up as
586pipes and be waiting for them to close before it waits for the submission
587process to terminate. If they aren't closed, they hold up the calling process
588until the initial delivery process finishes, which is not what we want.
589
590Exception: We do want it for synchronous delivery!
591
592And notwithstanding all the above, if D_resolver is set, implying resolver
593debugging, leave stdout open, because that's where the resolver writes its
594debugging output.
595
596When we close stderr (which implies we've also closed stdout), we also get rid
597of any controlling terminal.
598
599Arguments: None
600Returns: Nothing
601*/
602
603static void
604close_unwanted(void)
605{
606if (smtp_input)
607 {
01603eec 608#ifndef DISABLE_TLS
74f1a423
JH
609 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
610#endif
1fe64dcc
PH
611 (void)close(fileno(smtp_in));
612 (void)close(fileno(smtp_out));
059ec3d9
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613 smtp_in = NULL;
614 }
615else
616 {
1fe64dcc
PH
617 (void)close(0); /* stdin */
618 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
619 if (debug_selector == 0) /* stderr */
059ec3d9 620 {
8768d548 621 if (!f.synchronous_delivery)
059ec3d9 622 {
1fe64dcc 623 (void)close(2);
059ec3d9
PH
624 log_stderr = NULL;
625 }
626 (void)setsid();
627 }
628 }
629}
630
631
632
633
634/*************************************************
635* Set uid and gid *
636*************************************************/
637
638/* This function sets a new uid and gid permanently, optionally calling
639initgroups() to set auxiliary groups. There are some special cases when running
640Exim in unprivileged modes. In these situations the effective uid will not be
641root; if we already have the right effective uid/gid, and don't need to
642initialize any groups, leave things as they are.
643
644Arguments:
645 uid the uid
646 gid the gid
647 igflag TRUE if initgroups() wanted
648 msg text to use in debugging output and failure log
649
650Returns: nothing; bombs out on failure
651*/
652
653void
654exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
655{
656uid_t euid = geteuid();
657gid_t egid = getegid();
658
659if (euid == root_uid || euid != uid || egid != gid || igflag)
660 {
661 /* At least one OS returns +1 for initgroups failure, so just check for
662 non-zero. */
663
664 if (igflag)
665 {
666 struct passwd *pw = getpwuid(uid);
9af3c549
JH
667 if (!pw)
668 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
669 "no passwd entry for uid=%ld", (long int)uid);
670
671 if (initgroups(pw->pw_name, gid) != 0)
672 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
673 (long int)uid, strerror(errno));
059ec3d9
PH
674 }
675
676 if (setgid(gid) < 0 || setuid(uid) < 0)
059ec3d9
PH
677 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
678 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
059ec3d9
PH
679 }
680
681/* Debugging output included uid/gid and all groups */
682
683DEBUG(D_uid)
684 {
cd59ab18 685 int group_count, save_errno;
157d73b5 686 gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9
PH
687 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
688 (long int)geteuid(), (long int)getegid(), (long int)getpid());
157d73b5 689 group_count = getgroups(nelem(group_list), group_list);
cd59ab18 690 save_errno = errno;
059ec3d9
PH
691 debug_printf(" auxiliary group list:");
692 if (group_count > 0)
d7978c0f 693 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
cd59ab18
PP
694 else if (group_count < 0)
695 debug_printf(" <error: %s>", strerror(save_errno));
059ec3d9
PH
696 else debug_printf(" <none>");
697 debug_printf("\n");
698 }
699}
700
701
702
703
704/*************************************************
705* Exit point *
706*************************************************/
707
708/* Exim exits via this function so that it always clears up any open
709databases.
710
711Arguments:
712 rc return code
713
714Returns: does not return
715*/
716
717void
9bfb7e1b 718exim_exit(int rc, const uschar * process)
059ec3d9
PH
719{
720search_tidyup();
f3ebb786 721store_exit();
059ec3d9 722DEBUG(D_any)
9bfb7e1b
JH
723 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
724 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
725 process ? "(" : "", process, process ? ") " : "", rc);
059ec3d9
PH
726exit(rc);
727}
728
729
f3ebb786 730void
afd5e75f 731exim_underbar_exit(int rc, const uschar * process)
f3ebb786
JH
732{
733store_exit();
afd5e75f
JH
734DEBUG(D_any)
735 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
736 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
737 process ? "(" : "", process, process ? ") " : "", rc);
f3ebb786
JH
738_exit(rc);
739}
740
741
059ec3d9 742
9af3c549
JH
743/* Print error string, then die */
744static void
745exim_fail(const char * fmt, ...)
746{
747va_list ap;
748va_start(ap, fmt);
749vfprintf(stderr, fmt, ap);
750exit(EXIT_FAILURE);
751}
752
b66fecb4
HSHR
753/* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
754of chown()/fchown(). See src/functions.h for more explanation */
755int
756exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
757{
ecf14f2a 758int saved_errno = errno; /* from the preceeding chown call */
b66fecb4
HSHR
759#if 1
760log_write(0, LOG_MAIN|LOG_PANIC,
761 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
762 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
763 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
764#else
765/* I leave this here, commented, in case the "bug"(?) comes up again.
766 It is not an Exim bug, but we can provide a workaround.
767 See Bug 2391
768 HS 2019-04-18 */
769
b66fecb4
HSHR
770struct stat buf;
771
772if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
773{
774 if (buf.st_uid == owner && buf.st_gid == group) return 0;
775 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
776}
777else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
778
ecf14f2a 779#endif
b66fecb4
HSHR
780errno = saved_errno;
781return -1;
b66fecb4 782}
9af3c549 783
059ec3d9
PH
784
785/*************************************************
786* Extract port from host address *
787*************************************************/
788
789/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
PH
790It also checks the syntax of the address, and terminates it before the
791port data when a port is extracted.
059ec3d9
PH
792
793Argument:
794 address the address, with possible port on the end
795
796Returns: the port, or zero if there isn't one
797 bombs out on a syntax error
798*/
799
800static int
801check_port(uschar *address)
802{
7cd1141b 803int port = host_address_extract_port(address);
8e669ac1 804if (string_is_ip_address(address, NULL) == 0)
9af3c549 805 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
059ec3d9
PH
806return port;
807}
808
809
810
811/*************************************************
812* Test/verify an address *
813*************************************************/
814
815/* This function is called by the -bv and -bt code. It extracts a working
816address from a full RFC 822 address. This isn't really necessary per se, but it
817has the effect of collapsing source routes.
818
819Arguments:
820 s the address string
821 flags flag bits for verify_address()
822 exit_value to be set for failures
823
a5a28604 824Returns: nothing
059ec3d9
PH
825*/
826
827static void
828test_address(uschar *s, int flags, int *exit_value)
829{
830int start, end, domain;
831uschar *parse_error = NULL;
832uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
833 FALSE);
834if (address == NULL)
835 {
836 fprintf(stdout, "syntax error: %s\n", parse_error);
837 *exit_value = 2;
838 }
839else
840 {
841 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 842 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
843 if (rc == FAIL) *exit_value = 2;
844 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
845 }
846}
847
848
849
850/*************************************************
059ec3d9
PH
851* Show supported features *
852*************************************************/
853
059ec3d9 854static void
96508de1 855show_db_version(FILE * f)
059ec3d9
PH
856{
857#ifdef DB_VERSION_STRING
96508de1
JH
858DEBUG(D_any)
859 {
860 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
861 fprintf(f, " Runtime: %s\n",
862 db_version(NULL, NULL, NULL));
863 }
864else
865 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
866
059ec3d9
PH
867#elif defined(BTREEVERSION) && defined(HASHVERSION)
868 #ifdef USE_DB
869 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
870 #else
871 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
872 #endif
96508de1 873
059ec3d9
PH
874#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
875fprintf(f, "Probably ndbm\n");
876#elif defined(USE_TDB)
877fprintf(f, "Using tdb\n");
878#else
879 #ifdef USE_GDBM
880 fprintf(f, "Probably GDBM (native mode)\n");
881 #else
882 fprintf(f, "Probably GDBM (compatibility mode)\n");
883 #endif
884#endif
96508de1
JH
885}
886
887
888/* This function is called for -bV/--version and for -d to output the optional
889features of the current Exim binary.
890
891Arguments: a FILE for printing
892Returns: nothing
893*/
894
895static void
8768d548 896show_whats_supported(FILE * fp)
96508de1 897{
8768d548 898DEBUG(D_any) {} else show_db_version(fp);
059ec3d9 899
8768d548 900fprintf(fp, "Support for:");
9cec981f 901#ifdef SUPPORT_CRYPTEQ
8768d548 902 fprintf(fp, " crypteq");
9cec981f 903#endif
059ec3d9 904#if HAVE_ICONV
8768d548 905 fprintf(fp, " iconv()");
059ec3d9
PH
906#endif
907#if HAVE_IPV6
8768d548 908 fprintf(fp, " IPv6");
059ec3d9 909#endif
79378e0f 910#ifdef HAVE_SETCLASSRESOURCES
8768d548 911 fprintf(fp, " use_setclassresources");
929ba01c 912#endif
059ec3d9 913#ifdef SUPPORT_PAM
8768d548 914 fprintf(fp, " PAM");
059ec3d9
PH
915#endif
916#ifdef EXIM_PERL
8768d548 917 fprintf(fp, " Perl");
059ec3d9 918#endif
1a46a8c5 919#ifdef EXPAND_DLFUNC
8768d548 920 fprintf(fp, " Expand_dlfunc");
1a46a8c5 921#endif
059ec3d9 922#ifdef USE_TCP_WRAPPERS
8768d548 923 fprintf(fp, " TCPwrappers");
059ec3d9 924#endif
de517fd3 925#ifdef USE_GNUTLS
8768d548 926 fprintf(fp, " GnuTLS");
de517fd3
JH
927#endif
928#ifdef USE_OPENSSL
8768d548 929 fprintf(fp, " OpenSSL");
059ec3d9 930#endif
b2f5a032 931#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
8768d548 932 fprintf(fp, " translate_ip_address");
b2f5a032 933#endif
f174f16e 934#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8768d548 935 fprintf(fp, " move_frozen_messages");
f174f16e 936#endif
8523533c 937#ifdef WITH_CONTENT_SCAN
8768d548 938 fprintf(fp, " Content_Scanning");
8523533c 939#endif
c0635b6d 940#ifdef SUPPORT_DANE
8768d548 941 fprintf(fp, " DANE");
c0635b6d 942#endif
74f150bf 943#ifndef DISABLE_DKIM
8768d548 944 fprintf(fp, " DKIM");
74f150bf 945#endif
ef1bbb27 946#ifndef DISABLE_DNSSEC
8768d548 947 fprintf(fp, " DNSSEC");
ef1bbb27 948#endif
0cbf2b82 949#ifndef DISABLE_EVENT
8768d548 950 fprintf(fp, " Event");
0cbf2b82 951#endif
8c5d388a 952#ifdef SUPPORT_I18N
8768d548 953 fprintf(fp, " I18N");
8c5d388a 954#endif
74f150bf 955#ifndef DISABLE_OCSP
8768d548 956 fprintf(fp, " OCSP");
74f150bf 957#endif
81344b40 958#ifndef DISABLE_PIPE_CONNECT
4e48d56c
JH
959 fprintf(fp, " PIPE_CONNECT");
960#endif
4d832da1 961#ifndef DISABLE_PRDR
8768d548 962 fprintf(fp, " PRDR");
4d832da1 963#endif
cee5f132 964#ifdef SUPPORT_PROXY
8768d548 965 fprintf(fp, " PROXY");
cee5f132 966#endif
f0989ec0 967#ifdef SUPPORT_SOCKS
8768d548 968 fprintf(fp, " SOCKS");
f2de3a33 969#endif
7952eef9 970#ifdef SUPPORT_SPF
8768d548 971 fprintf(fp, " SPF");
7952eef9 972#endif
1a2e76e1
JH
973#ifdef SUPPORT_DMARC
974 fprintf(fp, " DMARC");
975#endif
1a2dfad5 976#ifdef TCP_FASTOPEN
d85cdeb5 977 tcp_init();
8768d548 978 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
1a2dfad5 979#endif
617d3932 980#ifdef EXPERIMENTAL_ARC
8768d548 981 fprintf(fp, " Experimental_ARC");
617d3932 982#endif
8523533c 983#ifdef EXPERIMENTAL_BRIGHTMAIL
8768d548 984 fprintf(fp, " Experimental_Brightmail");
8523533c 985#endif
6a8f9482 986#ifdef EXPERIMENTAL_DCC
8768d548 987 fprintf(fp, " Experimental_DCC");
6a8f9482 988#endif
895fbaf2 989#ifdef EXPERIMENTAL_DSN_INFO
8768d548 990 fprintf(fp, " Experimental_DSN_info");
895fbaf2 991#endif
ff966302
JH
992#ifdef EXPERIMENTAL_LMDB
993 fprintf(fp, " Experimental_LMDB");
994#endif
995#ifdef EXPERIMENTAL_QUEUE_RAMP
996 fprintf(fp, " Experimental_Queue_Ramp");
997#endif
998#ifdef EXPERIMENTAL_QUEUEFILE
999 fprintf(fp, " Experimental_QUEUEFILE");
1000#endif
1001#if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1002 fprintf(fp, " Experimental_SRS");
1003#endif
b10c87b3
JH
1004#ifdef EXPERIMENTAL_TLS_RESUME
1005 fprintf(fp, " Experimental_TLS_resume");
1006#endif
8768d548 1007fprintf(fp, "\n");
059ec3d9 1008
8768d548 1009fprintf(fp, "Lookups (built-in):");
e6d225ae 1010#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
8768d548 1011 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
059ec3d9 1012#endif
e6d225ae 1013#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
8768d548 1014 fprintf(fp, " cdb");
059ec3d9 1015#endif
e6d225ae 1016#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
8768d548 1017 fprintf(fp, " dbm dbmjz dbmnz");
059ec3d9 1018#endif
e6d225ae 1019#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
8768d548 1020 fprintf(fp, " dnsdb");
059ec3d9 1021#endif
e6d225ae 1022#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
8768d548 1023 fprintf(fp, " dsearch");
059ec3d9 1024#endif
e6d225ae 1025#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
8768d548 1026 fprintf(fp, " ibase");
059ec3d9 1027#endif
ffc92d69
JH
1028#if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1029 fprintf(fp, " json");
1030#endif
e6d225ae 1031#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
8768d548 1032 fprintf(fp, " ldap ldapdn ldapm");
059ec3d9 1033#endif
5bde3efa 1034#ifdef EXPERIMENTAL_LMDB
8768d548 1035 fprintf(fp, " lmdb");
5bde3efa 1036#endif
e6d225ae 1037#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
8768d548 1038 fprintf(fp, " mysql");
059ec3d9 1039#endif
e6d225ae 1040#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
8768d548 1041 fprintf(fp, " nis nis0");
059ec3d9 1042#endif
e6d225ae 1043#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
8768d548 1044 fprintf(fp, " nisplus");
059ec3d9 1045#endif
e6d225ae 1046#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
8768d548 1047 fprintf(fp, " oracle");
059ec3d9 1048#endif
e6d225ae 1049#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
8768d548 1050 fprintf(fp, " passwd");
059ec3d9 1051#endif
e6d225ae 1052#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
8768d548 1053 fprintf(fp, " pgsql");
059ec3d9 1054#endif
de78e2d5 1055#if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
8768d548 1056 fprintf(fp, " redis");
de78e2d5 1057#endif
e6d225ae 1058#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
8768d548 1059 fprintf(fp, " sqlite");
13b685f9 1060#endif
e6d225ae 1061#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
8768d548 1062 fprintf(fp, " testdb");
059ec3d9 1063#endif
e6d225ae 1064#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
8768d548 1065 fprintf(fp, " whoson");
059ec3d9 1066#endif
8768d548 1067fprintf(fp, "\n");
059ec3d9 1068
8768d548
JH
1069auth_show_supported(fp);
1070route_show_supported(fp);
1071transport_show_supported(fp);
059ec3d9 1072
c11d665d 1073#ifdef WITH_CONTENT_SCAN
8768d548 1074malware_show_supported(fp);
c11d665d
JH
1075#endif
1076
059ec3d9
PH
1077if (fixed_never_users[0] > 0)
1078 {
1079 int i;
8768d548 1080 fprintf(fp, "Fixed never_users: ");
059ec3d9 1081 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
8768d548
JH
1082 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1083 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
059ec3d9 1084 }
21c28500 1085
8768d548 1086fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
19bfe9e7 1087
8768d548 1088fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 1089
6545de78
PP
1090/* Everything else is details which are only worth reporting when debugging.
1091Perhaps the tls_version_report should move into this too. */
1092DEBUG(D_any) do {
1093
b3c261f7
PP
1094/* clang defines __GNUC__ (at least, for me) so test for it first */
1095#if defined(__clang__)
8768d548 1096 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
b3c261f7 1097#elif defined(__GNUC__)
8768d548 1098 fprintf(fp, "Compiler: GCC [%s]\n",
b3c261f7
PP
1099# ifdef __VERSION__
1100 __VERSION__
1101# else
1102 "? unknown version ?"
1103# endif
1104 );
1105#else
8768d548 1106 fprintf(fp, "Compiler: <unknown>\n");
b3c261f7
PP
1107#endif
1108
98913c8e 1109#if defined(__GLIBC__) && !defined(__UCLIBC__)
8768d548 1110 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
01f3091a
JH
1111 __GLIBC__, __GLIBC_MINOR__);
1112 if (__GLIBC_PREREQ(2, 1))
8768d548 1113 fprintf(fp, " Runtime: %s\n",
01f3091a
JH
1114 gnu_get_libc_version());
1115#endif
1116
8768d548 1117show_db_version(fp);
96508de1 1118
01603eec 1119#ifndef DISABLE_TLS
8768d548 1120 tls_version_report(fp);
754a0503 1121#endif
8c5d388a 1122#ifdef SUPPORT_I18N
8768d548 1123 utf8_version_report(fp);
b04be5e7 1124#endif
85e453f6
JH
1125#ifdef SUPPORT_SPF
1126 spf_lib_version_report(fp);
1127#endif
754a0503 1128
d7978c0f 1129 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
fc362fc5 1130 if (authi->version_report)
8768d548 1131 (*authi->version_report)(fp);
6545de78 1132
decd95cb 1133 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1134 characters; unless it's an ancient version of PCRE in which case it
1135 is not defined. */
1136#ifndef PCRE_PRERELEASE
01f3091a 1137# define PCRE_PRERELEASE
6475bd82
PP
1138#endif
1139#define QUOTE(X) #X
1140#define EXPAND_AND_QUOTE(X) QUOTE(X)
8768d548 1141 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
6545de78
PP
1142 " Runtime: %s\n",
1143 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1144 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1145 pcre_version());
6475bd82
PP
1146#undef QUOTE
1147#undef EXPAND_AND_QUOTE
6545de78
PP
1148
1149 init_lookup_list();
d7978c0f 1150 for (int i = 0; i < lookup_list_count; i++)
6545de78 1151 if (lookup_list[i]->version_report)
8768d548 1152 lookup_list[i]->version_report(fp);
6545de78 1153
b70d2586 1154#ifdef WHITELIST_D_MACROS
8768d548 1155 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
b70d2586 1156#else
8768d548 1157 fprintf(fp, "WHITELIST_D_MACROS unset\n");
b70d2586
PP
1158#endif
1159#ifdef TRUSTED_CONFIG_LIST
8768d548 1160 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
b70d2586 1161#else
8768d548 1162 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
b70d2586
PP
1163#endif
1164
6545de78 1165} while (0);
059ec3d9
PH
1166}
1167
1168
98a90c36
PP
1169/*************************************************
1170* Show auxiliary information about Exim *
1171*************************************************/
1172
1173static void
1174show_exim_information(enum commandline_info request, FILE *stream)
1175{
98a90c36
PP
1176switch(request)
1177 {
1178 case CMDINFO_NONE:
1179 fprintf(stream, "Oops, something went wrong.\n");
1180 return;
1181 case CMDINFO_HELP:
1182 fprintf(stream,
1183"The -bI: flag takes a string indicating which information to provide.\n"
1184"If the string is not recognised, you'll get this help (on stderr).\n"
1185"\n"
1186" exim -bI:help this information\n"
030caf2a
JS
1187" exim -bI:dscp list of known dscp value keywords\n"
1188" exim -bI:sieve list of supported sieve extensions\n"
98a90c36
PP
1189);
1190 return;
1191 case CMDINFO_SIEVE:
d7978c0f 1192 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
98a90c36
PP
1193 fprintf(stream, "%s\n", *pp);
1194 return;
36a3ae5f
PP
1195 case CMDINFO_DSCP:
1196 dscp_list_to_stream(stream);
1197 return;
98a90c36
PP
1198 }
1199}
059ec3d9
PH
1200
1201
1202/*************************************************
1203* Quote a local part *
1204*************************************************/
1205
1206/* This function is used when a sender address or a From: or Sender: header
1207line is being created from the caller's login, or from an authenticated_id. It
1208applies appropriate quoting rules for a local part.
1209
1210Argument: the local part
1211Returns: the local part, quoted if necessary
1212*/
1213
1214uschar *
1215local_part_quote(uschar *lpart)
1216{
1217BOOL needs_quote = FALSE;
acec9514 1218gstring * g;
059ec3d9 1219
d7978c0f 1220for (uschar * t = lpart; !needs_quote && *t != 0; t++)
059ec3d9
PH
1221 {
1222 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1223 (*t != '.' || t == lpart || t[1] == 0);
1224 }
1225
1226if (!needs_quote) return lpart;
1227
acec9514 1228g = string_catn(NULL, US"\"", 1);
059ec3d9
PH
1229
1230for (;;)
1231 {
1232 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1233 if (nq == NULL)
1234 {
acec9514 1235 g = string_cat(g, lpart);
059ec3d9
PH
1236 break;
1237 }
acec9514
JH
1238 g = string_catn(g, lpart, nq - lpart);
1239 g = string_catn(g, US"\\", 1);
1240 g = string_catn(g, nq, 1);
059ec3d9
PH
1241 lpart = nq + 1;
1242 }
1243
acec9514
JH
1244g = string_catn(g, US"\"", 1);
1245return string_from_gstring(g);
059ec3d9
PH
1246}
1247
1248
1249
1250#ifdef USE_READLINE
1251/*************************************************
1252* Load readline() functions *
1253*************************************************/
1254
1255/* This function is called from testing executions that read data from stdin,
1256but only when running as the calling user. Currently, only -be does this. The
1257function loads the readline() function library and passes back the functions.
1258On some systems, it needs the curses library, so load that too, but try without
1259it if loading fails. All this functionality has to be requested at build time.
1260
1261Arguments:
1262 fn_readline_ptr pointer to where to put the readline pointer
1263 fn_addhist_ptr pointer to where to put the addhistory function
1264
1265Returns: the dlopen handle or NULL on failure
1266*/
1267
1268static void *
1ba28e2b
PP
1269set_readline(char * (**fn_readline_ptr)(const char *),
1270 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1271{
1272void *dlhandle;
e12f8c32 1273void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1274
e12f8c32 1275dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
b1c673dd 1276if (dlhandle_curses) dlclose(dlhandle_curses);
059ec3d9 1277
b1c673dd 1278if (dlhandle)
059ec3d9 1279 {
1ba28e2b
PP
1280 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1281 * char * readline (const char *prompt);
1282 * void add_history (const char *string);
1283 */
1284 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1285 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1286 }
1287else
059ec3d9 1288 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
059ec3d9
PH
1289
1290return dlhandle;
1291}
1292#endif
1293
1294
1295
1296/*************************************************
1297* Get a line from stdin for testing things *
1298*************************************************/
1299
1300/* This function is called when running tests that can take a number of lines
1301of input (for example, -be and -bt). It handles continuations and trailing
1302spaces. And prompting and a blank line output on eof. If readline() is in use,
1303the arguments are non-NULL and provide the relevant functions.
1304
1305Arguments:
1306 fn_readline readline function or NULL
1307 fn_addhist addhist function or NULL
1308
1309Returns: pointer to dynamic memory, or NULL at end of file
1310*/
1311
1312static uschar *
1ba28e2b 1313get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9 1314{
acec9514 1315gstring * g = NULL;
059ec3d9 1316
acec9514 1317if (!fn_readline) { printf("> "); fflush(stdout); }
059ec3d9 1318
d7978c0f 1319for (int i = 0;; i++)
059ec3d9
PH
1320 {
1321 uschar buffer[1024];
1322 uschar *p, *ss;
1323
1324 #ifdef USE_READLINE
1325 char *readline_line = NULL;
f3ebb786 1326 if (fn_readline)
059ec3d9 1327 {
f3ebb786
JH
1328 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1329 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
059ec3d9
PH
1330 p = US readline_line;
1331 }
1332 else
1333 #endif
1334
1335 /* readline() not in use */
1336
1337 {
1338 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1339 p = buffer;
1340 }
1341
1342 /* Handle the line */
1343
1344 ss = p + (int)Ustrlen(p);
1345 while (ss > p && isspace(ss[-1])) ss--;
1346
1347 if (i > 0)
059ec3d9 1348 while (p < ss && isspace(*p)) p++; /* leading space after cont */
059ec3d9 1349
acec9514 1350 g = string_catn(g, p, ss - p);
059ec3d9
PH
1351
1352 #ifdef USE_READLINE
acec9514 1353 if (fn_readline) free(readline_line);
059ec3d9
PH
1354 #endif
1355
acec9514
JH
1356 /* g can only be NULL if ss==p */
1357 if (ss == p || g->s[g->ptr-1] != '\\')
059ec3d9 1358 break;
acec9514
JH
1359
1360 --g->ptr;
1361 (void) string_from_gstring(g);
059ec3d9
PH
1362 }
1363
acec9514
JH
1364if (!g) printf("\n");
1365return string_from_gstring(g);
059ec3d9
PH
1366}
1367
1368
1369
1370/*************************************************
81ea09ca
NM
1371* Output usage information for the program *
1372*************************************************/
1373
1374/* This function is called when there are no recipients
1375 or a specific --help argument was added.
1376
1377Arguments:
1378 progname information on what name we were called by
1379
1380Returns: DOES NOT RETURN
1381*/
1382
1383static void
1384exim_usage(uschar *progname)
1385{
1386
4c04137d 1387/* Handle specific program invocation variants */
81ea09ca 1388if (Ustrcmp(progname, US"-mailq") == 0)
9af3c549 1389 exim_fail(
e765a0f1 1390 "mailq - list the contents of the mail queue\n\n"
81ea09ca 1391 "For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1392
1393/* Generic usage - we output this whatever happens */
9af3c549 1394exim_fail(
81ea09ca
NM
1395 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1396 "not directly from a shell command line. Options and/or arguments control\n"
1397 "what it does when called. For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1398}
1399
1400
1401
1402/*************************************************
a7cbbf50
PP
1403* Validate that the macros given are okay *
1404*************************************************/
1405
1406/* Typically, Exim will drop privileges if macros are supplied. In some
1407cases, we want to not do so.
1408
a4034eb8 1409Arguments: opt_D_used - true if the commandline had a "-D" option
a7cbbf50
PP
1410Returns: true if trusted, false otherwise
1411*/
1412
1413static BOOL
a4034eb8 1414macros_trusted(BOOL opt_D_used)
a7cbbf50
PP
1415{
1416#ifdef WHITELIST_D_MACROS
d7978c0f 1417uschar *whitelisted, *end, *p, **whites;
a7cbbf50
PP
1418int white_count, i, n;
1419size_t len;
1420BOOL prev_char_item, found;
1421#endif
1422
a4034eb8 1423if (!opt_D_used)
a7cbbf50
PP
1424 return TRUE;
1425#ifndef WHITELIST_D_MACROS
1426return FALSE;
1427#else
1428
66581d1e
PP
1429/* We only trust -D overrides for some invoking users:
1430root, the exim run-time user, the optional config owner user.
1431I don't know why config-owner would be needed, but since they can own the
1432config files anyway, there's no security risk to letting them override -D. */
1433if ( ! ((real_uid == root_uid)
1434 || (real_uid == exim_uid)
1435#ifdef CONFIGURE_OWNER
1436 || (real_uid == config_uid)
1437#endif
1438 ))
1439 {
1440 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1441 return FALSE;
1442 }
1443
a7cbbf50 1444/* Get a list of macros which are whitelisted */
f3ebb786 1445whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
a7cbbf50
PP
1446prev_char_item = FALSE;
1447white_count = 0;
1448for (p = whitelisted; *p != '\0'; ++p)
1449 {
1450 if (*p == ':' || isspace(*p))
1451 {
1452 *p = '\0';
1453 if (prev_char_item)
1454 ++white_count;
1455 prev_char_item = FALSE;
1456 continue;
1457 }
1458 if (!prev_char_item)
1459 prev_char_item = TRUE;
1460 }
1461end = p;
1462if (prev_char_item)
1463 ++white_count;
1464if (!white_count)
1465 return FALSE;
1466whites = store_malloc(sizeof(uschar *) * (white_count+1));
1467for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1468 {
1469 if (*p != '\0')
1470 {
1471 whites[i++] = p;
1472 if (i == white_count)
1473 break;
1474 while (*p != '\0' && p < end)
1475 ++p;
1476 }
1477 }
1478whites[i] = NULL;
1479
1a7c9a48
JH
1480/* The list of commandline macros should be very short.
1481Accept the N*M complexity. */
d7978c0f 1482for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1a7c9a48
JH
1483 {
1484 found = FALSE;
d7978c0f 1485 for (uschar ** w = whites; *w; ++w)
1a7c9a48
JH
1486 if (Ustrcmp(*w, m->name) == 0)
1487 {
1488 found = TRUE;
1489 break;
1490 }
1491 if (!found)
1492 return FALSE;
1493 if (!m->replacement)
1494 continue;
1495 if ((len = m->replen) == 0)
1496 continue;
1497 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1498 0, PCRE_EOPT, NULL, 0);
1499 if (n < 0)
1500 {
1501 if (n != PCRE_ERROR_NOMATCH)
1502 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1503 return FALSE;
1504 }
1505 }
43236f35 1506DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1507return TRUE;
1508#endif
1509}
1510
1511
1512/*************************************************
9650d98a
JH
1513* Expansion testing *
1514*************************************************/
1515
1516/* Expand and print one item, doing macro-processing.
1517
1518Arguments:
1519 item line for expansion
1520*/
1521
1522static void
1523expansion_test_line(uschar * line)
1524{
1525int len;
1526BOOL dummy_macexp;
1527
1528Ustrncpy(big_buffer, line, big_buffer_size);
1529big_buffer[big_buffer_size-1] = '\0';
1530len = Ustrlen(big_buffer);
1531
1532(void) macros_expand(0, &len, &dummy_macexp);
1533
1534if (isupper(big_buffer[0]))
1535 {
1536 if (macro_read_assignment(big_buffer))
1a7c9a48 1537 printf("Defined macro '%s'\n", mlast->name);
9650d98a
JH
1538 }
1539else
1540 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1541 else printf("Failed: %s\n", expand_string_message);
1542}
1543
1544
9af3c549 1545
9650d98a 1546/*************************************************
059ec3d9
PH
1547* Entry point and high-level code *
1548*************************************************/
1549
1550/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1551the appropriate action. All the necessary functions are present in the one
1552binary. I originally thought one should split it up, but it turns out that so
1553much of the apparatus is needed in each chunk that one might as well just have
1554it all available all the time, which then makes the coding easier as well.
1555
1556Arguments:
1557 argc count of entries in argv
1558 argv argument strings, with argv[0] being the program name
1559
1560Returns: EXIT_SUCCESS if terminated successfully
1561 EXIT_FAILURE otherwise, except when a message has been sent
1562 to the sender, and -oee was given
1563*/
1564
1565int
1566main(int argc, char **cargv)
1567{
1568uschar **argv = USS cargv;
1569int arg_receive_timeout = -1;
1570int arg_smtp_receive_timeout = -1;
1571int arg_error_handling = error_handling;
f05da2e8
PH
1572int filter_sfd = -1;
1573int filter_ufd = -1;
059ec3d9 1574int group_count;
1670ef10 1575int i, rv;
059ec3d9
PH
1576int list_queue_option = 0;
1577int msg_action = 0;
1578int msg_action_arg = -1;
1579int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1580int queue_only_reason = 0;
1581#ifdef EXIM_PERL
1582int perl_start_option = 0;
1583#endif
1584int recipients_arg = argc;
1585int sender_address_domain = 0;
1586int test_retry_arg = -1;
1587int test_rewrite_arg = -1;
3b7ac02c 1588gid_t original_egid;
059ec3d9
PH
1589BOOL arg_queue_only = FALSE;
1590BOOL bi_option = FALSE;
1591BOOL checking = FALSE;
1592BOOL count_queue = FALSE;
1593BOOL expansion_test = FALSE;
1594BOOL extract_recipients = FALSE;
f4ee74ac 1595BOOL flag_G = FALSE;
12f69989 1596BOOL flag_n = FALSE;
059ec3d9
PH
1597BOOL forced_delivery = FALSE;
1598BOOL f_end_dot = FALSE;
1599BOOL deliver_give_up = FALSE;
1600BOOL list_queue = FALSE;
1601BOOL list_options = FALSE;
bf3c2c6b 1602BOOL list_config = FALSE;
059ec3d9
PH
1603BOOL local_queue_only;
1604BOOL more = TRUE;
1605BOOL one_msg_action = FALSE;
4ab69ec7 1606BOOL opt_D_used = FALSE;
059ec3d9
PH
1607BOOL queue_only_set = FALSE;
1608BOOL receiving_message = TRUE;
33d73e3b 1609BOOL sender_ident_set = FALSE;
8669f003 1610BOOL session_local_queue_only;
059ec3d9
PH
1611BOOL unprivileged;
1612BOOL removed_privilege = FALSE;
81ea09ca 1613BOOL usage_wanted = FALSE;
059ec3d9
PH
1614BOOL verify_address_mode = FALSE;
1615BOOL verify_as_sender = FALSE;
1616BOOL version_printed = FALSE;
1617uschar *alias_arg = NULL;
1618uschar *called_as = US"";
a3fb9793 1619uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1620uschar *start_queue_run_id = NULL;
1621uschar *stop_queue_run_id = NULL;
328895cc 1622uschar *expansion_test_message = NULL;
059ec3d9
PH
1623uschar *ftest_domain = NULL;
1624uschar *ftest_localpart = NULL;
1625uschar *ftest_prefix = NULL;
1626uschar *ftest_suffix = NULL;
0ad2e0fc 1627uschar *log_oneline = NULL;
8544e77a 1628uschar *malware_test_file = NULL;
059ec3d9
PH
1629uschar *real_sender_address;
1630uschar *originator_home = US"/";
a3fb9793 1631size_t sz;
f3ebb786 1632rmark reset_point;
059ec3d9
PH
1633
1634struct passwd *pw;
1635struct stat statbuf;
1636pid_t passed_qr_pid = (pid_t)0;
1637int passed_qr_pipe = -1;
157d73b5 1638gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9 1639
98a90c36
PP
1640/* For the -bI: flag */
1641enum commandline_info info_flag = CMDINFO_NONE;
1642BOOL info_stdout = FALSE;
1643
059ec3d9
PH
1644/* Possible options for -R and -S */
1645
1646static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1647
1648/* Need to define this in case we need to change the environment in order
1649to get rid of a bogus time zone. We have to make it char rather than uschar
1650because some OS define it in /usr/include/unistd.h. */
1651
1652extern char **environ;
1653
9f01e50d
JH
1654#ifdef MEASURE_TIMING
1655(void)gettimeofday(&timestamp_startup, NULL);
1656#endif
1657
35edf2ff 1658/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1659defined by ref:name at build time, we must now find the actual uid/gid values.
1660This is a feature to make the lives of binary distributors easier. */
1661
1662#ifdef EXIM_USERNAME
1663if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1664 {
10385c15 1665 if (exim_uid == 0)
9af3c549
JH
1666 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1667
084c1d8c
PP
1668 /* If ref:name uses a number as the name, route_finduser() returns
1669 TRUE with exim_uid set and pw coerced to NULL. */
1670 if (pw)
1671 exim_gid = pw->pw_gid;
1672#ifndef EXIM_GROUPNAME
1673 else
9af3c549 1674 exim_fail(
084c1d8c
PP
1675 "exim: ref:name should specify a usercode, not a group.\n"
1676 "exim: can't let you get away with it unless you also specify a group.\n");
084c1d8c 1677#endif
059ec3d9
PH
1678 }
1679else
9af3c549 1680 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
059ec3d9
PH
1681#endif
1682
1683#ifdef EXIM_GROUPNAME
1684if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
9af3c549 1685 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
059ec3d9
PH
1686#endif
1687
1688#ifdef CONFIGURE_OWNERNAME
1689if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
9af3c549 1690 exim_fail("exim: failed to find uid for user name \"%s\"\n",
059ec3d9 1691 CONFIGURE_OWNERNAME);
059ec3d9
PH
1692#endif
1693
79d4bc3d
PP
1694/* We default the system_filter_user to be the Exim run-time user, as a
1695sane non-root value. */
1696system_filter_uid = exim_uid;
1697
35edf2ff
PH
1698#ifdef CONFIGURE_GROUPNAME
1699if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
9af3c549 1700 exim_fail("exim: failed to find gid for group name \"%s\"\n",
35edf2ff 1701 CONFIGURE_GROUPNAME);
35edf2ff
PH
1702#endif
1703
92e6a3d9
JH
1704/* In the Cygwin environment, some initialization used to need doing.
1705It was fudged in by means of this macro; now no longer but we'll leave
1706it in case of others. */
059ec3d9
PH
1707
1708#ifdef OS_INIT
1709OS_INIT
1710#endif
1711
1712/* Check a field which is patched when we are running Exim within its
1713testing harness; do a fast initial check, and then the whole thing. */
1714
8768d548 1715f.running_in_test_harness =
059ec3d9 1716 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
8768d548 1717if (f.running_in_test_harness)
65a32f85 1718 debug_store = TRUE;
059ec3d9
PH
1719
1720/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1721at the start of a program; however, it seems that some environments do not
1722follow this. A "strange" locale can affect the formatting of timestamps, so we
1723make quite sure. */
1724
1725setlocale(LC_ALL, "C");
1726
6906c131
JH
1727/* Get the offset between CLOCK_MONOTONIC and wallclock */
1728
1729#ifdef _POSIX_MONOTONIC_CLOCK
1730exim_clock_init();
1731#endif
1732
059ec3d9
PH
1733/* Set up the default handler for timing using alarm(). */
1734
1735os_non_restarting_signal(SIGALRM, sigalrm_handler);
1736
1737/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1738because store_malloc writes a log entry on failure. */
1739
40c90bca 1740if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
9af3c549 1741 exim_fail("exim: failed to get store for log buffer\n");
059ec3d9 1742
6c6d6e48
TF
1743/* Initialize the default log options. */
1744
1745bits_set(log_selector, log_selector_size, log_default);
1746
059ec3d9
PH
1747/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1748NULL when the daemon is run and the file is closed. We have to use this
1749indirection, because some systems don't allow writing to the variable "stderr".
1750*/
1751
1752if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1753
1754/* Arrange for the PCRE regex library to use our store functions. Note that
1755the normal calls are actually macros that add additional arguments for
1756debugging purposes so we have to assign specially constructed functions here.
1757The default is to use store in the stacking pool, but this is overridden in the
1758regex_must_compile() function. */
1759
1760pcre_malloc = function_store_get;
1761pcre_free = function_dummy_free;
1762
1763/* Ensure there is a big buffer for temporary use in several places. It is put
1764in malloc store so that it can be freed for enlargement if necessary. */
1765
1766big_buffer = store_malloc(big_buffer_size);
1767
1768/* Set up the handler for the data request signal, and set the initial
1769descriptive text. */
1770
f3ebb786 1771process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
059ec3d9
PH
1772set_process_info("initializing");
1773os_restarting_signal(SIGUSR1, usr1_handler);
1774
830832c9
HSHR
1775/* If running in a dockerized environment, the TERM signal is only
1776delegated to the PID 1 if we request it by setting an signal handler */
1777if (getpid() == 1) signal(SIGTERM, term_handler);
1778
059ec3d9
PH
1779/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1780in the daemon code. For the rest of Exim's uses, we ignore it. */
1781
1782signal(SIGHUP, SIG_IGN);
1783
1784/* We don't want to die on pipe errors as the code is written to handle
1785the write error instead. */
1786
1787signal(SIGPIPE, SIG_IGN);
1788
1789/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1790set to SIG_IGN. This causes subprocesses that complete before the parent
1791process waits for them not to hang around, so when Exim calls wait(), nothing
1792is there. The wait() code has been made robust against this, but let's ensure
1793that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1794ending status. We use sigaction rather than plain signal() on those OS where
1795SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1796problem on AIX with this.) */
1797
1798#ifdef SA_NOCLDWAIT
1799 {
1800 struct sigaction act;
1801 act.sa_handler = SIG_DFL;
1802 sigemptyset(&(act.sa_mask));
1803 act.sa_flags = 0;
1804 sigaction(SIGCHLD, &act, NULL);
1805 }
1806#else
1807signal(SIGCHLD, SIG_DFL);
1808#endif
1809
1810/* Save the arguments for use if we re-exec exim as a daemon after receiving
1811SIGHUP. */
1812
1813sighup_argv = argv;
1814
1815/* Set up the version number. Set up the leading 'E' for the external form of
1816message ids, set the pointer to the internal form, and initialize it to
1817indicate no message being processed. */
1818
1819version_init();
1820message_id_option[0] = '-';
1821message_id_external = message_id_option + 1;
1822message_id_external[0] = 'E';
1823message_id = message_id_external + 1;
1824message_id[0] = 0;
1825
67d175de 1826/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1827created with the modes that it specifies. NOTE: Files created with fopen() have
1828a problem, which was not recognized till rather late (February 2006). With this
1829umask, such files will be world writeable. (They are all content scanning files
1830in the spool directory, which isn't world-accessible, so this is not a
1831disaster, but it's untidy.) I don't want to change this overall setting,
1832however, because it will interact badly with the open() calls. Instead, there's
1833now a function called modefopen() that fiddles with the umask while calling
1834fopen(). */
059ec3d9 1835
67d175de 1836(void)umask(0);
059ec3d9
PH
1837
1838/* Precompile the regular expression for matching a message id. Keep this in
1839step with the code that generates ids in the accept.c module. We need to do
1840this here, because the -M options check their arguments for syntactic validity
1841using mac_ismsgid, which uses this. */
1842
1843regex_ismsgid =
1844 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1845
a5bd321b 1846/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1847code, possibly extended, at the start of an error message. Note that the
1848terminating whitespace character is included. */
a5bd321b
PH
1849
1850regex_smtp_code =
1851 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1852 FALSE, TRUE);
1853
a7cbbf50
PP
1854#ifdef WHITELIST_D_MACROS
1855/* Precompile the regular expression used to filter the content of macros
1856given to -D for permissibility. */
1857
1858regex_whitelisted_macro =
1859 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1860#endif
1861
f38917cc
JH
1862for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1863
059ec3d9
PH
1864/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1865this seems to be a generally accepted convention, since one finds symbolic
1866links called "mailq" in standard OS configurations. */
1867
1868if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1869 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1870 {
1871 list_queue = TRUE;
1872 receiving_message = FALSE;
1873 called_as = US"-mailq";
1874 }
1875
1876/* If the program is called as "rmail" treat it as equivalent to
1877"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1878i.e. preventing a single dot on a line from terminating the message, and
1879returning with zero return code, even in cases of error (provided an error
1880message has been sent). */
1881
1882if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1883 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1884 {
8768d548 1885 f.dot_ends = FALSE;
059ec3d9
PH
1886 called_as = US"-rmail";
1887 errors_sender_rc = EXIT_SUCCESS;
1888 }
1889
1890/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1891this is a smail convention. */
1892
1893if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1894 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1895 {
1896 smtp_input = smtp_batched_input = TRUE;
1897 called_as = US"-rsmtp";
1898 }
1899
1900/* If the program is called as "runq" treat it as equivalent to "exim -q";
1901this is a smail convention. */
1902
1903if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1904 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1905 {
1906 queue_interval = 0;
1907 receiving_message = FALSE;
1908 called_as = US"-runq";
1909 }
1910
1911/* If the program is called as "newaliases" treat it as equivalent to
1912"exim -bi"; this is a sendmail convention. */
1913
1914if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1915 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1916 {
1917 bi_option = TRUE;
1918 receiving_message = FALSE;
1919 called_as = US"-newaliases";
1920 }
1921
1922/* Save the original effective uid for a couple of uses later. It should
1923normally be root, but in some esoteric environments it may not be. */
1924
1925original_euid = geteuid();
3b7ac02c 1926original_egid = getegid();
059ec3d9
PH
1927
1928/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1929to be the same as the real ones. This makes a difference only if Exim is setuid
1930(or setgid) to something other than root, which could be the case in some
1931special configurations. */
1932
1933real_uid = getuid();
1934real_gid = getgid();
1935
1936if (real_uid == root_uid)
1937 {
9af3c549
JH
1938 if ((rv = setgid(real_gid)))
1939 exim_fail("exim: setgid(%ld) failed: %s\n",
1670ef10 1940 (long int)real_gid, strerror(errno));
9af3c549
JH
1941 if ((rv = setuid(real_uid)))
1942 exim_fail("exim: setuid(%ld) failed: %s\n",
1670ef10 1943 (long int)real_uid, strerror(errno));
059ec3d9
PH
1944 }
1945
1946/* If neither the original real uid nor the original euid was root, Exim is
1947running in an unprivileged state. */
1948
1949unprivileged = (real_uid != root_uid && original_euid != root_uid);
1950
059ec3d9
PH
1951/* Scan the program's arguments. Some can be dealt with right away; others are
1952simply recorded for checking and handling afterwards. Do a high-level switch
1953on the second character (the one after '-'), to save some effort. */
1954
1955for (i = 1; i < argc; i++)
1956 {
1957 BOOL badarg = FALSE;
1958 uschar *arg = argv[i];
1959 uschar *argrest;
1960 int switchchar;
1961
1962 /* An argument not starting with '-' is the start of a recipients list;
1963 break out of the options-scanning loop. */
1964
1965 if (arg[0] != '-')
1966 {
1967 recipients_arg = i;
1968 break;
1969 }
1970
4c04137d 1971 /* An option consisting of -- terminates the options */
059ec3d9
PH
1972
1973 if (Ustrcmp(arg, "--") == 0)
1974 {
1975 recipients_arg = i + 1;
1976 break;
1977 }
1978
1979 /* Handle flagged options */
1980
1981 switchchar = arg[1];
1982 argrest = arg+2;
1983
1984 /* Make all -ex options synonymous with -oex arguments, since that
1985 is assumed by various callers. Also make -qR options synonymous with -R
1986 options, as that seems to be required as well. Allow for -qqR too, and
1987 the same for -S options. */
1988
1989 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1990 Ustrncmp(arg+1, "qR", 2) == 0 ||
1991 Ustrncmp(arg+1, "qS", 2) == 0)
1992 {
1993 switchchar = arg[2];
1994 argrest++;
1995 }
1996 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1997 {
1998 switchchar = arg[3];
1999 argrest += 2;
8768d548 2000 f.queue_2stage = TRUE;
059ec3d9
PH
2001 }
2002
2003 /* Make -r synonymous with -f, since it is a documented alias */
2004
2005 else if (arg[1] == 'r') switchchar = 'f';
2006
2007 /* Make -ov synonymous with -v */
2008
2009 else if (Ustrcmp(arg, "-ov") == 0)
2010 {
2011 switchchar = 'v';
2012 argrest++;
2013 }
2014
4b2241d2
PP
2015 /* deal with --option_aliases */
2016 else if (switchchar == '-')
2017 {
2018 if (Ustrcmp(argrest, "help") == 0)
2019 {
2020 usage_wanted = TRUE;
2021 break;
2022 }
2023 else if (Ustrcmp(argrest, "version") == 0)
2024 {
2025 switchchar = 'b';
73a46702 2026 argrest = US"V";
4b2241d2
PP
2027 }
2028 }
2029
059ec3d9
PH
2030 /* High-level switch on active initial letter */
2031
2032 switch(switchchar)
2033 {
a3fb9793
PP
2034
2035 /* sendmail uses -Ac and -Am to control which .cf file is used;
2036 we ignore them. */
2037 case 'A':
2038 if (*argrest == '\0') { badarg = TRUE; break; }
2039 else
2040 {
2041 BOOL ignore = FALSE;
2042 switch (*argrest)
2043 {
2044 case 'c':
2045 case 'm':
2046 if (*(argrest + 1) == '\0')
2047 ignore = TRUE;
2048 break;
2049 }
bdcc6f2b 2050 if (!ignore) badarg = TRUE;
a3fb9793
PP
2051 }
2052 break;
2053
059ec3d9
PH
2054 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2055 so has no need of it. */
2056
2057 case 'B':
bdcc6f2b 2058 if (!*argrest) i++; /* Skip over the type */
059ec3d9
PH
2059 break;
2060
2061
2062 case 'b':
059ec3d9 2063 {
bdcc6f2b
JH
2064 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2065
2066 switch (*argrest++)
2067 {
2068 /* -bd: Run in daemon mode, awaiting SMTP connections.
2069 -bdf: Ditto, but in the foreground.
2070 */
2071 case 'd':
2072 f.daemon_listen = TRUE;
2073 if (*argrest == 'f') f.background_daemon = FALSE;
2074 else if (*argrest) badarg = TRUE;
2075 break;
2076
2077 /* -be: Run in expansion test mode
2078 -bem: Ditto, but read a message from a file first
2079 */
2080 case 'e':
2081 expansion_test = checking = TRUE;
2082 if (*argrest == 'm')
2083 {
2084 if (++i >= argc) { badarg = TRUE; break; }
2085 expansion_test_message = argv[i];
2086 argrest++;
2087 }
2088 if (*argrest) badarg = TRUE;
2089 break;
2090
2091 /* -bF: Run system filter test */
2092 case 'F':
2093 filter_test |= checking = FTEST_SYSTEM;
2094 if (*argrest) { badarg = TRUE; break; }
2095 if (++i < argc) filter_test_sfile = argv[i]; else
2096 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2097 break;
2098
2099 /* -bf: Run user filter test
2100 -bfd: Set domain for filter testing
2101 -bfl: Set local part for filter testing
2102 -bfp: Set prefix for filter testing
2103 -bfs: Set suffix for filter testing
2104 */
2105 case 'f':
2106 if (!*argrest)
2107 {
2108 filter_test |= checking = FTEST_USER;
2109 if (++i < argc) filter_test_ufile = argv[i];
2110 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2111 }
2112 else
2113 {
2114 if (++i >= argc)
2115 exim_fail("exim: string expected after %s\n", arg);
2116 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2117 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2118 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2119 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2120 else badarg = TRUE;
2121 }
2122 break;
2123
2124 /* -bh: Host checking - an IP address must follow. */
2125 case 'h':
2126 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2127 {
2128 if (++i >= argc) { badarg = TRUE; break; }
2129 sender_host_address = argv[i];
2130 host_checking = checking = f.log_testing_mode = TRUE;
2131 f.host_checking_callout = *argrest == 'c';
2132 message_logs = FALSE;
2133 }
2134 else badarg = TRUE;
2135 break;
2136
2137 /* -bi: This option is used by sendmail to initialize *the* alias file,
2138 though it has the -oA option to specify a different file. Exim has no
2139 concept of *the* alias file, but since Sun's YP make script calls
2140 sendmail this way, some support must be provided. */
2141 case 'i':
2142 if (!*++argrest) bi_option = TRUE;
2143 else badarg = TRUE;
2144 break;
2145
2146 /* -bI: provide information, of the type to follow after a colon.
2147 This is an Exim flag. */
2148 case 'I':
2149 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2150 {
2151 uschar *p = argrest+1;
2152 info_flag = CMDINFO_HELP;
2153 if (Ustrlen(p))
2154 if (strcmpic(p, CUS"sieve") == 0)
2155 {
2156 info_flag = CMDINFO_SIEVE;
2157 info_stdout = TRUE;
2158 }
2159 else if (strcmpic(p, CUS"dscp") == 0)
2160 {
2161 info_flag = CMDINFO_DSCP;
2162 info_stdout = TRUE;
2163 }
2164 else if (strcmpic(p, CUS"help") == 0)
2165 info_stdout = TRUE;
2166 }
2167 else badarg = TRUE;
2168 break;
2169
2170 /* -bm: Accept and deliver message - the default option. Reinstate
2171 receiving_message, which got turned off for all -b options.
2172 -bmalware: test the filename given for malware */
2173 case 'm':
2174 if (!*argrest) receiving_message = TRUE;
2175 else if (Ustrcmp(argrest, "alware") == 0)
2176 {
2177 if (++i >= argc) { badarg = TRUE; break; }
2178 checking = TRUE;
2179 malware_test_file = argv[i];
2180 }
2181 else badarg = TRUE;
2182 break;
2183
2184 /* -bnq: For locally originating messages, do not qualify unqualified
2185 addresses. In the envelope, this causes errors; in header lines they
2186 just get left. */
2187 case 'n':
2188 if (Ustrcmp(argrest, "q") == 0)
2189 {
2190 f.allow_unqualified_sender = FALSE;
2191 f.allow_unqualified_recipient = FALSE;
2192 }
2193 else badarg = TRUE;
2194 break;
2195
2196 /* -bpxx: List the contents of the mail queue, in various forms. If
2197 the option is -bpc, just a queue count is needed. Otherwise, if the
2198 first letter after p is r, then order is random. */
2199 case 'p':
2200 if (*argrest == 'c')
2201 {
2202 count_queue = TRUE;
2203 if (*++argrest) badarg = TRUE;
2204 break;
2205 }
2206
2207 if (*argrest == 'r')
2208 {
2209 list_queue_option = 8;
2210 argrest++;
2211 }
2212 else list_queue_option = 0;
2213
2214 list_queue = TRUE;
2215
2216 /* -bp: List the contents of the mail queue, top-level only */
2217
2218 if (!*argrest) {}
2219
2220 /* -bpu: List the contents of the mail queue, top-level undelivered */
2221
2222 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2223
2224 /* -bpa: List the contents of the mail queue, including all delivered */
2225
2226 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2227
2228 /* Unknown after -bp[r] */
2229
2230 else badarg = TRUE;
2231 break;
2232
2233
2234 /* -bP: List the configuration variables given as the address list.
2235 Force -v, so configuration errors get displayed. */
2236 case 'P':
2237
2238 /* -bP config: we need to setup here, because later,
2239 * when list_options is checked, the config is read already */
2240 if (*argrest)
2241 badarg = TRUE;
2242 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2243 {
2244 list_config = TRUE;
2245 readconf_save_config(version_string);
2246 }
2247 else
2248 {
2249 list_options = TRUE;
2250 debug_selector |= D_v;
2251 debug_file = stderr;
2252 }
2253 break;
2254
2255 /* -brt: Test retry configuration lookup */
2256 case 'r':
2257 if (Ustrcmp(argrest, "t") == 0)
2258 {
2259 checking = TRUE;
2260 test_retry_arg = i + 1;
2261 goto END_ARG;
2262 }
2263
2264 /* -brw: Test rewrite configuration */
2265
2266 else if (Ustrcmp(argrest, "w") == 0)
2267 {
2268 checking = TRUE;
2269 test_rewrite_arg = i + 1;
2270 goto END_ARG;
2271 }
2272 else badarg = TRUE;
2273 break;
2274
2275 /* -bS: Read SMTP commands on standard input, but produce no replies -
2276 all errors are reported by sending messages. */
2277 case 'S':
2278 if (!*argrest)
2279 smtp_input = smtp_batched_input = receiving_message = TRUE;
2280 else badarg = TRUE;
2281 break;
2282
2283 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2284 on standard output. */
2285 case 's':
2286 if (!*argrest) smtp_input = receiving_message = TRUE;
2287 else badarg = TRUE;
2288 break;
2289
2290 /* -bt: address testing mode */
2291 case 't':
2292 if (!*argrest)
2293 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2294 else badarg = TRUE;
2295 break;
2296
2297 /* -bv: verify addresses */
2298 case 'v':
2299 if (!*argrest)
2300 verify_address_mode = checking = f.log_testing_mode = TRUE;
2301
2302 /* -bvs: verify sender addresses */
2303
2304 else if (Ustrcmp(argrest, "s") == 0)
2305 {
2306 verify_address_mode = checking = f.log_testing_mode = TRUE;
2307 verify_as_sender = TRUE;
2308 }
2309 else badarg = TRUE;
2310 break;
2311
2312 /* -bV: Print version string and support details */
2313 case 'V':
2314 if (!*argrest)
2315 {
2316 printf("Exim version %s #%s built %s\n", version_string,
2317 version_cnumber, version_date);
2318 printf("%s\n", CS version_copyright);
2319 version_printed = TRUE;
2320 show_whats_supported(stdout);
2321 f.log_testing_mode = TRUE;
2322 }
2323 else badarg = TRUE;
2324 break;
2325
2326 /* -bw: inetd wait mode, accept a listening socket as stdin */
2327 case 'w':
2328 f.inetd_wait_mode = TRUE;
2329 f.background_daemon = FALSE;
2330 f.daemon_listen = TRUE;
2331 if (*argrest)
2332 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2333 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2334 break;
2335
2336 default:
2337 badarg = TRUE;
2338 break;
2339 }
2340 break;
9ee44efb
PP
2341 }
2342
059ec3d9
PH
2343
2344 /* -C: change configuration file list; ignore if it isn't really
2345 a change! Enforce a prefix check if required. */
2346
2347 case 'C':
2348 if (*argrest == 0)
2349 {
2350 if(++i < argc) argrest = argv[i]; else
2351 { badarg = TRUE; break; }
2352 }
2353 if (Ustrcmp(config_main_filelist, argrest) != 0)
2354 {
2355 #ifdef ALT_CONFIG_PREFIX
2356 int sep = 0;
2357 int len = Ustrlen(ALT_CONFIG_PREFIX);
863bd541 2358 const uschar *list = argrest;
059ec3d9
PH
2359 uschar *filename;
2360 while((filename = string_nextinlist(&list, &sep, big_buffer,
2361 big_buffer_size)) != NULL)
2362 {
2363 if ((Ustrlen(filename) < len ||
2364 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2365 Ustrstr(filename, "/../") != NULL) &&
2366 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
9af3c549 2367 exim_fail("-C Permission denied\n");
059ec3d9
PH
2368 }
2369 #endif
261dc43e
DW
2370 if (real_uid != root_uid)
2371 {
90b6341f 2372 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2373
90b6341f
DW
2374 if (real_uid != exim_uid
2375 #ifdef CONFIGURE_OWNER
2376 && real_uid != config_uid
2377 #endif
2378 )
8768d548 2379 f.trusted_config = FALSE;
261dc43e
DW
2380 else
2381 {
90b6341f 2382 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2383 if (trust_list)
2384 {
2385 struct stat statbuf;
2386
2387 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2388 (statbuf.st_uid != root_uid /* owner not root */
2389 #ifdef CONFIGURE_OWNER
2390 && statbuf.st_uid != config_uid /* owner not the special one */
2391 #endif
2392 ) || /* or */
2393 (statbuf.st_gid != root_gid /* group not root */
2394 #ifdef CONFIGURE_GROUP
2395 && statbuf.st_gid != config_gid /* group not the special one */
2396 #endif
2397 && (statbuf.st_mode & 020) != 0 /* group writeable */
2398 ) || /* or */
2399 (statbuf.st_mode & 2) != 0) /* world writeable */
2400 {
8768d548 2401 f.trusted_config = FALSE;
261dc43e
DW
2402 fclose(trust_list);
2403 }
2404 else
2405 {
2406 /* Well, the trust list at least is up to scratch... */
f3ebb786 2407 rmark reset_point = store_mark();
90b6341f
DW
2408 uschar *trusted_configs[32];
2409 int nr_configs = 0;
261dc43e
DW
2410 int i = 0;
2411
2412 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2413 {
2414 uschar *start = big_buffer, *nl;
2415 while (*start && isspace(*start))
2416 start++;
1e83d68b 2417 if (*start != '/')
261dc43e
DW
2418 continue;
2419 nl = Ustrchr(start, '\n');
2420 if (nl)
2421 *nl = 0;
90b6341f
DW
2422 trusted_configs[nr_configs++] = string_copy(start);
2423 if (nr_configs == 32)
261dc43e
DW
2424 break;
2425 }
2426 fclose(trust_list);
2427
90b6341f 2428 if (nr_configs)
261dc43e
DW
2429 {
2430 int sep = 0;
55414b25 2431 const uschar *list = argrest;
261dc43e 2432 uschar *filename;
8768d548 2433 while (f.trusted_config && (filename = string_nextinlist(&list,
261dc43e
DW
2434 &sep, big_buffer, big_buffer_size)) != NULL)
2435 {
90b6341f 2436 for (i=0; i < nr_configs; i++)
90b6341f 2437 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e 2438 break;
90b6341f 2439 if (i == nr_configs)
261dc43e 2440 {
8768d548 2441 f.trusted_config = FALSE;
261dc43e
DW
2442 break;
2443 }
2444 }
2445 }
f3ebb786 2446 else /* No valid prefixes found in trust_list file. */
8768d548 2447 f.trusted_config = FALSE;
f3ebb786 2448 store_reset(reset_point);
261dc43e
DW
2449 }
2450 }
f3ebb786 2451 else /* Could not open trust_list file. */
8768d548 2452 f.trusted_config = FALSE;
261dc43e
DW
2453 }
2454 #else
2455 /* Not root; don't trust config */
8768d548 2456 f.trusted_config = FALSE;
261dc43e
DW
2457 #endif
2458 }
059ec3d9
PH
2459
2460 config_main_filelist = argrest;
8768d548 2461 f.config_changed = TRUE;
059ec3d9
PH
2462 }
2463 break;
2464
2465
2466 /* -D: set up a macro definition */
2467
2468 case 'D':
9af3c549
JH
2469#ifdef DISABLE_D_OPTION
2470 exim_fail("exim: -D is not available in this Exim binary\n");
2471#else
059ec3d9
PH
2472 {
2473 int ptr = 0;
059ec3d9
PH
2474 macro_item *m;
2475 uschar name[24];
2476 uschar *s = argrest;
2477
4ab69ec7 2478 opt_D_used = TRUE;
059ec3d9
PH
2479 while (isspace(*s)) s++;
2480
2481 if (*s < 'A' || *s > 'Z')
9af3c549 2482 exim_fail("exim: macro name set by -D must start with "
059ec3d9 2483 "an upper case letter\n");
059ec3d9
PH
2484
2485 while (isalnum(*s) || *s == '_')
2486 {
2487 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2488 s++;
2489 }
2490 name[ptr] = 0;
2491 if (ptr == 0) { badarg = TRUE; break; }
2492 while (isspace(*s)) s++;
2493 if (*s != 0)
2494 {
2495 if (*s++ != '=') { badarg = TRUE; break; }
2496 while (isspace(*s)) s++;
2497 }
2498
85e03244 2499 for (m = macros_user; m; m = m->next)
1a7c9a48 2500 if (Ustrcmp(m->name, name) == 0)
9af3c549 2501 exim_fail("exim: duplicated -D in command line\n");
059ec3d9 2502
85e03244 2503 m = macro_create(name, s, TRUE);
059ec3d9
PH
2504
2505 if (clmacro_count >= MAX_CLMACROS)
9af3c549 2506 exim_fail("exim: too many -D options on command line\n");
f3ebb786
JH
2507 clmacros[clmacro_count++] =
2508 string_sprintf("-D%s=%s", m->name, m->replacement);
059ec3d9
PH
2509 }
2510 #endif
2511 break;
2512
2513 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2514 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2515 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2516
2517 case 'd':
2518 if (Ustrcmp(argrest, "ropcr") == 0)
2519 {
2520 /* drop_cr = TRUE; */
2521 }
2522
2523 /* Use an intermediate variable so that we don't set debugging while
2524 decoding the debugging bits. */
2525
2526 else
2527 {
2528 unsigned int selector = D_default;
2529 debug_selector = 0;
2530 debug_file = NULL;
3d235903
PH
2531 if (*argrest == 'd')
2532 {
8768d548 2533 f.debug_daemon = TRUE;
3d235903
PH
2534 argrest++;
2535 }
059ec3d9 2536 if (*argrest != 0)
6c6d6e48
TF
2537 decode_bits(&selector, 1, debug_notall, argrest,
2538 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2539 debug_selector = selector;
2540 }
2541 break;
2542
2543
2544 /* -E: This is a local error message. This option is not intended for
2545 external use at all, but is not restricted to trusted callers because it
2546 does no harm (just suppresses certain error messages) and if Exim is run
2547 not setuid root it won't always be trusted when it generates error
2548 messages using this option. If there is a message id following -E, point
2549 message_reference at it, for logging. */
2550
2551 case 'E':
8768d548 2552 f.local_error_message = TRUE;
059ec3d9
PH
2553 if (mac_ismsgid(argrest)) message_reference = argrest;
2554 break;
2555
2556
2557 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2558 option, so it looks as if historically the -oex options are also callable
2559 without the leading -o. So we have to accept them. Before the switch,
2560 anything starting -oe has been converted to -e. Exim does not support all
2561 of the sendmail error options. */
2562
2563 case 'e':
2564 if (Ustrcmp(argrest, "e") == 0)
2565 {
2566 arg_error_handling = ERRORS_SENDER;
2567 errors_sender_rc = EXIT_SUCCESS;
2568 }
2569 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2570 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2571 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2572 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2573 else badarg = TRUE;
2574 break;
2575
2576
2577 /* -F: Set sender's full name, used instead of the gecos entry from
2578 the password file. Since users can usually alter their gecos entries,
2579 there's no security involved in using this instead. The data can follow
2580 the -F or be in the next argument. */
2581
2582 case 'F':
2583 if (*argrest == 0)
2584 {
2585 if(++i < argc) argrest = argv[i]; else
2586 { badarg = TRUE; break; }
2587 }
2588 originator_name = argrest;
8768d548 2589 f.sender_name_forced = TRUE;
059ec3d9
PH
2590 break;
2591
2592
2593 /* -f: Set sender's address - this value is only actually used if Exim is
2594 run by a trusted user, or if untrusted_set_sender is set and matches the
2595 address, except that the null address can always be set by any user. The
2596 test for this happens later, when the value given here is ignored when not
2597 permitted. For an untrusted user, the actual sender is still put in Sender:
2598 if it doesn't match the From: header (unless no_local_from_check is set).
2599 The data can follow the -f or be in the next argument. The -r switch is an
2600 obsolete form of -f but since there appear to be programs out there that
2601 use anything that sendmail has ever supported, better accept it - the
2602 synonymizing is done before the switch above.
2603
2604 At this stage, we must allow domain literal addresses, because we don't
2605 know what the setting of allow_domain_literals is yet. Ditto for trailing
2606 dots and strip_trailing_dot. */
2607
2608 case 'f':
2609 {
250b6871 2610 int dummy_start, dummy_end;
059ec3d9
PH
2611 uschar *errmess;
2612 if (*argrest == 0)
2613 {
2614 if (i+1 < argc) argrest = argv[++i]; else
2615 { badarg = TRUE; break; }
2616 }
2617 if (*argrest == 0)
f3ebb786 2618 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
059ec3d9
PH
2619 else
2620 {
2621 uschar *temp = argrest + Ustrlen(argrest) - 1;
2622 while (temp >= argrest && isspace(*temp)) temp--;
2623 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2624 allow_domain_literals = TRUE;
2625 strip_trailing_dot = TRUE;
8c5d388a 2626#ifdef SUPPORT_I18N
250b6871
JH
2627 allow_utf8_domains = TRUE;
2628#endif
2629 sender_address = parse_extract_address(argrest, &errmess,
2630 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
f3ebb786 2631 sender_address = string_copy_taint(sender_address, TRUE);
8c5d388a 2632#ifdef SUPPORT_I18N
250b6871
JH
2633 message_smtputf8 = string_is_utf8(sender_address);
2634 allow_utf8_domains = FALSE;
2635#endif
059ec3d9
PH
2636 allow_domain_literals = FALSE;
2637 strip_trailing_dot = FALSE;
9af3c549
JH
2638 if (!sender_address)
2639 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
059ec3d9 2640 }
8768d548 2641 f.sender_address_forced = TRUE;
059ec3d9
PH
2642 }
2643 break;
2644
a3fb9793 2645 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2646 sendmail may complain about problems instead of fixing them.
2647 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2648 not at this time complain about problems. */
059ec3d9
PH
2649
2650 case 'G':
f4ee74ac 2651 flag_G = TRUE;
059ec3d9
PH
2652 break;
2653
2654 /* -h: Set the hop count for an incoming message. Exim does not currently
2655 support this; it always computes it by counting the Received: headers.
2656 To put it in will require a change to the spool header file format. */
2657
2658 case 'h':
2659 if (*argrest == 0)
2660 {
2661 if(++i < argc) argrest = argv[i]; else
2662 { badarg = TRUE; break; }
2663 }
2664 if (!isdigit(*argrest)) badarg = TRUE;
2665 break;
2666
2667
2668 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2669 not to be documented for sendmail but mailx (at least) uses it) */
2670
2671 case 'i':
8768d548 2672 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
059ec3d9
PH
2673 break;
2674
2675
a3fb9793
PP
2676 /* -L: set the identifier used for syslog; equivalent to setting
2677 syslog_processname in the config file, but needs to be an admin option. */
2678
2679 case 'L':
2680 if (*argrest == '\0')
2681 {
2682 if(++i < argc) argrest = argv[i]; else
2683 { badarg = TRUE; break; }
2684 }
9af3c549
JH
2685 if ((sz = Ustrlen(argrest)) > 32)
2686 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
a3fb9793 2687 if (sz < 1)
9af3c549 2688 exim_fail("exim: the -L syslog name is too short\n");
a3fb9793
PP
2689 cmdline_syslog_name = argrest;
2690 break;
2691
059ec3d9
PH
2692 case 'M':
2693 receiving_message = FALSE;
2694
2695 /* -MC: continue delivery of another message via an existing open
2696 file descriptor. This option is used for an internal call by the
2697 smtp transport when there is a pending message waiting to go to an
2698 address to which it has got a connection. Five subsequent arguments are
2699 required: transport name, host name, IP address, sequence number, and
2700 message_id. Transports may decline to create new processes if the sequence
2701 number gets too big. The channel is stdin. This (-MC) must be the last
2702 argument. There's a subsequent check that the real-uid is privileged.
2703
2704 If we are running in the test harness. delay for a bit, to let the process
2705 that set this one up complete. This makes for repeatability of the logging,
2706 etc. output. */
2707
2708 if (Ustrcmp(argrest, "C") == 0)
2709 {
41c7c167
PH
2710 union sockaddr_46 interface_sock;
2711 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2712
059ec3d9 2713 if (argc != i + 6)
9af3c549 2714 exim_fail("exim: too many or too few arguments after -MC\n");
059ec3d9
PH
2715
2716 if (msg_action_arg >= 0)
9af3c549 2717 exim_fail("exim: incompatible arguments\n");
059ec3d9
PH
2718
2719 continue_transport = argv[++i];
2720 continue_hostname = argv[++i];
2721 continue_host_address = argv[++i];
2722 continue_sequence = Uatoi(argv[++i]);
2723 msg_action = MSG_DELIVER;
2724 msg_action_arg = ++i;
2725 forced_delivery = TRUE;
2726 queue_run_pid = passed_qr_pid;
2727 queue_run_pipe = passed_qr_pipe;
2728
2729 if (!mac_ismsgid(argv[i]))
9af3c549 2730 exim_fail("exim: malformed message id %s after -MC option\n",
059ec3d9 2731 argv[i]);
059ec3d9 2732
875512a3
JH
2733 /* Set up $sending_ip_address and $sending_port, unless proxied */
2734
5013d912 2735 if (!continue_proxy_cipher)
875512a3
JH
2736 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2737 &size) == 0)
2738 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2739 &sending_port);
2740 else
9af3c549 2741 exim_fail("exim: getsockname() failed after -MC option: %s\n",
875512a3 2742 strerror(errno));
41c7c167 2743
9f01e50d 2744 testharness_pause_ms(500);
059ec3d9
PH
2745 break;
2746 }
2747
2d14f397
JH
2748 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2749 {
875512a3 2750 switch(argrest[1])
2d14f397 2751 {
059ec3d9
PH
2752 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2753 precedes -MC (see above). The flag indicates that the host to which
2754 Exim is connected has accepted an AUTH sequence. */
2755
8768d548 2756 case 'A': f.smtp_authenticated = TRUE; break;
059ec3d9 2757
6c1c3d1d
WB
2758 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2759 that exim is connected to supports the esmtp extension DSN */
28b3821f 2760
14de8063 2761 case 'D': smtp_peer_options |= OPTION_DSN; break;
6c1c3d1d 2762
32393657
JH
2763 /* -MCd: for debug, set a process-purpose string */
2764
4b01271f
JH
2765 case 'd': if (++i < argc)
2766 process_purpose = string_copy_taint(argv[i], TRUE);
32393657
JH
2767 else badarg = TRUE;
2768 break;
2769
e37f8a84 2770 /* -MCG: set the queue name, to a non-default value */
28b3821f 2771
2d14f397
JH
2772 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2773 else badarg = TRUE;
2774 break;
2775
2776 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2777
14de8063 2778 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
28b3821f 2779
059ec3d9
PH
2780 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2781 it preceded -MC (see above) */
2782
14de8063 2783 case 'P': smtp_peer_options |= OPTION_PIPE; break;
059ec3d9
PH
2784
2785 /* -MCQ: pass on the pid of the queue-running process that started
2786 this chain of deliveries and the fd of its synchronizing pipe; this
2787 is useful only when it precedes -MC (see above) */
2788
2d14f397
JH
2789 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2790 else badarg = TRUE;
2791 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2792 else badarg = TRUE;
2793 break;
059ec3d9
PH
2794
2795 /* -MCS: set the smtp_use_size flag; this is useful only when it
2796 precedes -MC (see above) */
2797
14de8063 2798 case 'S': smtp_peer_options |= OPTION_SIZE; break;
059ec3d9 2799
01603eec 2800#ifndef DISABLE_TLS
875512a3 2801 /* -MCt: similar to -MCT below but the connection is still open
aded2255 2802 via a proxy process which handles the TLS context and coding.
5013d912
JH
2803 Require three arguments for the proxied local address and port,
2804 and the TLS cipher. */
875512a3 2805
5013d912 2806 case 't': if (++i < argc) sending_ip_address = argv[i];
875512a3
JH
2807 else badarg = TRUE;
2808 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2809 else badarg = TRUE;
5013d912
JH
2810 if (++i < argc) continue_proxy_cipher = argv[i];
2811 else badarg = TRUE;
875512a3
JH
2812 /*FALLTHROUGH*/
2813
059ec3d9
PH
2814 /* -MCT: set the tls_offered flag; this is useful only when it
2815 precedes -MC (see above). The flag indicates that the host to which
2816 Exim is connected has offered TLS support. */
2817
14de8063 2818 case 'T': smtp_peer_options |= OPTION_TLS; break;
2d14f397
JH
2819#endif
2820
2821 default: badarg = TRUE; break;
2822 }
8ac90765
JH
2823 break;
2824 }
2825
059ec3d9
PH
2826 /* -M[x]: various operations on the following list of message ids:
2827 -M deliver the messages, ignoring next retry times and thawing
2828 -Mc deliver the messages, checking next retry times, no thawing
2829 -Mf freeze the messages
2830 -Mg give up on the messages
2831 -Mt thaw the messages
2832 -Mrm remove the messages
2833 In the above cases, this must be the last option. There are also the
2834 following options which are followed by a single message id, and which
2835 act on that message. Some of them use the "recipient" addresses as well.
2836 -Mar add recipient(s)
2837 -Mmad mark all recipients delivered
2838 -Mmd mark recipients(s) delivered
2839 -Mes edit sender
0ef732d9 2840 -Mset load a message for use with -be
059ec3d9 2841 -Mvb show body
a96603a0 2842 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2843 -Mvh show header
2844 -Mvl show log
2845 */
2846
2847 else if (*argrest == 0)
2848 {
2849 msg_action = MSG_DELIVER;
8768d548 2850 forced_delivery = f.deliver_force_thaw = TRUE;
059ec3d9
PH
2851 }
2852 else if (Ustrcmp(argrest, "ar") == 0)
2853 {
2854 msg_action = MSG_ADD_RECIPIENT;
2855 one_msg_action = TRUE;
2856 }
2857 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2858 else if (Ustrcmp(argrest, "es") == 0)
2859 {
2860 msg_action = MSG_EDIT_SENDER;
2861 one_msg_action = TRUE;
2862 }
2863 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2864 else if (Ustrcmp(argrest, "g") == 0)
2865 {
2866 msg_action = MSG_DELIVER;
2867 deliver_give_up = TRUE;
2868 }
fc7bae7f
JH
2869 else if (Ustrcmp(argrest, "G") == 0)
2870 {
2871 msg_action = MSG_SETQUEUE;
2872 queue_name_dest = argv[++i];
2873 }
059ec3d9
PH
2874 else if (Ustrcmp(argrest, "mad") == 0)
2875 {
2876 msg_action = MSG_MARK_ALL_DELIVERED;
2877 }
2878 else if (Ustrcmp(argrest, "md") == 0)
2879 {
2880 msg_action = MSG_MARK_DELIVERED;
2881 one_msg_action = TRUE;
2882 }
2883 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2884 else if (Ustrcmp(argrest, "set") == 0)
2885 {
2886 msg_action = MSG_LOAD;
2887 one_msg_action = TRUE;
2888 }
059ec3d9
PH
2889 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2890 else if (Ustrcmp(argrest, "vb") == 0)
2891 {
2892 msg_action = MSG_SHOW_BODY;
2893 one_msg_action = TRUE;
2894 }
a96603a0
PH
2895 else if (Ustrcmp(argrest, "vc") == 0)
2896 {
2897 msg_action = MSG_SHOW_COPY;
2898 one_msg_action = TRUE;
2899 }
059ec3d9
PH
2900 else if (Ustrcmp(argrest, "vh") == 0)
2901 {
2902 msg_action = MSG_SHOW_HEADER;
2903 one_msg_action = TRUE;
2904 }
2905 else if (Ustrcmp(argrest, "vl") == 0)
2906 {
2907 msg_action = MSG_SHOW_LOG;
2908 one_msg_action = TRUE;
2909 }
2910 else { badarg = TRUE; break; }
2911
2912 /* All the -Mxx options require at least one message id. */
2913
2914 msg_action_arg = i + 1;
2915 if (msg_action_arg >= argc)
9af3c549 2916 exim_fail("exim: no message ids given after %s option\n", arg);
059ec3d9
PH
2917
2918 /* Some require only message ids to follow */
2919
2920 if (!one_msg_action)
2921 {
d7978c0f 2922 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
9af3c549 2923 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2924 argv[j], arg);
059ec3d9
PH
2925 goto END_ARG; /* Remaining args are ids */
2926 }
2927
2928 /* Others require only one message id, possibly followed by addresses,
2929 which will be handled as normal arguments. */
2930
2931 else
2932 {
2933 if (!mac_ismsgid(argv[msg_action_arg]))
9af3c549 2934 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2935 argv[msg_action_arg], arg);
059ec3d9
PH
2936 i++;
2937 }
2938 break;
2939
2940
2941 /* Some programs seem to call the -om option without the leading o;
2942 for sendmail it askes for "me too". Exim always does this. */
2943
2944 case 'm':
2945 if (*argrest != 0) badarg = TRUE;
2946 break;
2947
2948
2949 /* -N: don't do delivery - a debugging option that stops transports doing
2950 their thing. It implies debugging at the D_v level. */
2951
2952 case 'N':
2953 if (*argrest == 0)
2954 {
8768d548 2955 f.dont_deliver = TRUE;
059ec3d9
PH
2956 debug_selector |= D_v;
2957 debug_file = stderr;
2958 }
2959 else badarg = TRUE;
2960 break;
2961
2962
12f69989
PP
2963 /* -n: This means "don't alias" in sendmail, apparently.
2964 For normal invocations, it has no effect.
2965 It may affect some other options. */
059ec3d9
PH
2966
2967 case 'n':
12f69989 2968 flag_n = TRUE;
059ec3d9
PH
2969 break;
2970
2971 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2972 option to the specified value. This form uses long names. We need to handle
2973 -O option=value and -Ooption=value. */
2974
2975 case 'O':
2976 if (*argrest == 0)
059ec3d9 2977 if (++i >= argc)
9af3c549 2978 exim_fail("exim: string expected after -O\n");
059ec3d9
PH
2979 break;
2980
2981 case 'o':
777cc748 2982 switch (*argrest++)
059ec3d9 2983 {
777cc748
JH
2984 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2985 file" option). */
2986 case 'A':
2987 if (!*(alias_arg = argrest))
2988 if (i+1 < argc) alias_arg = argv[++i];
2989 else exim_fail("exim: string expected after -oA\n");
2990 break;
2991
2992 /* -oB: Set a connection message max value for remote deliveries */
2993 case 'B':
2994 {
2995 uschar * p = argrest;
2996 if (!*p)
2997 if (i+1 < argc && isdigit((argv[i+1][0])))
2998 p = argv[++i];
2999 else
3000 {
3001 connection_max_messages = 1;
3002 p = NULL;
3003 }
059ec3d9 3004
777cc748
JH
3005 if (p)
3006 {
3007 if (!isdigit(*p))
3008 exim_fail("exim: number expected after -oB\n");
3009 connection_max_messages = Uatoi(p);
3010 }
3011 }
3012 break;
3013
3014 /* -odb: background delivery */
3015
3016 case 'd':
3017 if (Ustrcmp(argrest, "b") == 0)
3018 {
3019 f.synchronous_delivery = FALSE;
3020 arg_queue_only = FALSE;
3021 queue_only_set = TRUE;
3022 }
3023
ff966302
JH
3024 /* -odd: testsuite-only: add no inter-process delays */
3025
3026 else if (Ustrcmp(argrest, "d") == 0)
3027 f.testsuite_delays = FALSE;
3028
777cc748
JH
3029 /* -odf: foreground delivery (smail-compatible option); same effect as
3030 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3031 */
3032
3033 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3034 {
3035 f.synchronous_delivery = TRUE;
3036 arg_queue_only = FALSE;
3037 queue_only_set = TRUE;
3038 }
3039
3040 /* -odq: queue only */
3041
3042 else if (Ustrcmp(argrest, "q") == 0)
3043 {
3044 f.synchronous_delivery = FALSE;
3045 arg_queue_only = TRUE;
3046 queue_only_set = TRUE;
3047 }
3048
3049 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3050 but no remote delivery */
3051
3052 else if (Ustrcmp(argrest, "qs") == 0)
3053 {
3054 f.queue_smtp = TRUE;
3055 arg_queue_only = FALSE;
3056 queue_only_set = TRUE;
3057 }
3058 else badarg = TRUE;
3059 break;
3060
3061 /* -oex: Sendmail error flags. As these are also accepted without the
3062 leading -o prefix, for compatibility with vacation and other callers,
3063 they are handled with -e above. */
3064
3065 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3066 -oitrue: Another sendmail syntax for the same */
3067
3068 case 'i':
3069 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3070 f.dot_ends = FALSE;
3071 else badarg = TRUE;
3072 break;
059ec3d9
PH
3073
3074 /* -oM*: Set various characteristics for an incoming message; actually
3075 acted on for trusted callers only. */
3076
777cc748
JH
3077 case 'M':
3078 {
3079 if (i+1 >= argc)
3080 exim_fail("exim: data expected after -oM%s\n", argrest);
059ec3d9 3081
777cc748 3082 /* -oMa: Set sender host address */
059ec3d9 3083
777cc748 3084 if (Ustrcmp(argrest, "a") == 0) sender_host_address = argv[++i];
059ec3d9 3085
777cc748 3086 /* -oMaa: Set authenticator name */
059ec3d9 3087
777cc748
JH
3088 else if (Ustrcmp(argrest, "aa") == 0)
3089 sender_host_authenticated = argv[++i];
059ec3d9 3090
777cc748 3091 /* -oMas: setting authenticated sender */
059ec3d9 3092
777cc748
JH
3093 else if (Ustrcmp(argrest, "as") == 0)
3094 authenticated_sender = string_copy_taint(argv[++i], TRUE);
059ec3d9 3095
777cc748 3096 /* -oMai: setting authenticated id */
059ec3d9 3097
777cc748
JH
3098 else if (Ustrcmp(argrest, "ai") == 0)
3099 authenticated_id = string_copy_taint(argv[++i], TRUE);
059ec3d9 3100
777cc748 3101 /* -oMi: Set incoming interface address */
d2af03f4 3102
777cc748 3103 else if (Ustrcmp(argrest, "i") == 0) interface_address = argv[++i];
d2af03f4 3104
777cc748 3105 /* -oMm: Message reference */
059ec3d9 3106
777cc748
JH
3107 else if (Ustrcmp(argrest, "m") == 0)
3108 {
3109 if (!mac_ismsgid(argv[i+1]))
3110 exim_fail("-oMm must be a valid message ID\n");
3111 if (!f.trusted_config)
3112 exim_fail("-oMm must be called by a trusted user/config\n");
3113 message_reference = argv[++i];
3114 }
059ec3d9 3115
777cc748 3116 /* -oMr: Received protocol */
059ec3d9 3117
777cc748 3118 else if (Ustrcmp(argrest, "r") == 0)
059ec3d9 3119
777cc748
JH
3120 if (received_protocol)
3121 exim_fail("received_protocol is set already\n");
3122 else
3123 received_protocol = argv[++i];
059ec3d9 3124
777cc748 3125 /* -oMs: Set sender host name */
059ec3d9 3126
777cc748
JH
3127 else if (Ustrcmp(argrest, "s") == 0)
3128 sender_host_name = string_copy_taint(argv[++i], TRUE);
059ec3d9 3129
777cc748 3130 /* -oMt: Set sender ident */
059ec3d9 3131
777cc748
JH
3132 else if (Ustrcmp(argrest, "t") == 0)
3133 {
3134 sender_ident_set = TRUE;
3135 sender_ident = argv[++i];
3136 }
059ec3d9 3137
777cc748 3138 /* Else a bad argument */
059ec3d9 3139
777cc748
JH
3140 else
3141 badarg = TRUE;
3142 }
3143 break;
3144
3145 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3146 seem to call this as -m (undocumented), so that is also accepted (see
3147 above). */
3148 /* -oo: An ancient flag for old-style addresses which still seems to
3149 crop up in some calls (see in SCO). */
3150
3151 case 'm':
3152 case 'o':
305e4fae 3153 if (*argrest) badarg = TRUE;
777cc748
JH
3154 break;
3155
3156 /* -oP <name>: set pid file path for daemon
3157 -oPX: delete pid file of daemon */
3158
3159 case 'P':
3160 if (!*argrest) override_pid_file_path = argv[++i];
3161 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3162 else badarg = TRUE;
3163 break;
3164
3165
3166 /* -or <n>: set timeout for non-SMTP acceptance
3167 -os <n>: set timeout for SMTP acceptance */
3168
3169 case 'r':
3170 case 's':
305e4fae
HSHR
3171 {
3172 int * tp = argrest[-1] == 'r'
3173 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3174 if (*argrest)
3175 *tp = readconf_readtime(argrest, 0, FALSE);
3176 else if (i+1 < argc)
3177 *tp = readconf_readtime(argv[++i], 0, FALSE);
3178
3179 if (*tp < 0)
3180 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3181 }
777cc748 3182 break;
059ec3d9 3183
777cc748 3184 /* -oX <list>: Override local_interfaces and/or default daemon ports */
059ec3d9 3185
777cc748 3186 case 'X':
305e4fae
HSHR
3187 if (*argrest) badarg = TRUE;
3188 else override_local_interfaces = argv[++i];
777cc748 3189 break;
01446a56 3190
777cc748 3191 /* Unknown -o argument */
059ec3d9 3192
777cc748
JH
3193 default:
3194 badarg = TRUE;
059ec3d9 3195 }
059ec3d9
PH
3196 break;
3197
3198
3199 /* -ps: force Perl startup; -pd force delayed Perl startup */
3200
3201 case 'p':
3202 #ifdef EXIM_PERL
3203 if (*argrest == 's' && argrest[1] == 0)
3204 {
3205 perl_start_option = 1;
3206 break;
3207 }
3208 if (*argrest == 'd' && argrest[1] == 0)
3209 {
3210 perl_start_option = -1;
3211 break;
3212 }
3213 #endif
3214
3215 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3216 which sets the host protocol and host name */
3217
3218 if (*argrest == 0)
5bfe3b35
JH
3219 if (i+1 < argc)
3220 argrest = argv[++i];
3221 else
059ec3d9 3222 { badarg = TRUE; break; }
059ec3d9
PH
3223
3224 if (*argrest != 0)
3225 {
65e061b7
HSHR
3226 uschar *hn;
3227
3228 if (received_protocol)
9af3c549 3229 exim_fail("received_protocol is set already\n");
65e061b7
HSHR
3230
3231 hn = Ustrchr(argrest, ':');
059ec3d9 3232 if (hn == NULL)
059ec3d9 3233 received_protocol = argrest;
059ec3d9
PH
3234 else
3235 {
90341c71
JH
3236 int old_pool = store_pool;
3237 store_pool = POOL_PERM;
059ec3d9 3238 received_protocol = string_copyn(argrest, hn - argrest);
90341c71 3239 store_pool = old_pool;
059ec3d9
PH
3240 sender_host_name = hn + 1;
3241 }
3242 }
3243 break;
3244
3245
3246 case 'q':
3247 receiving_message = FALSE;
3cc66b45 3248 if (queue_interval >= 0)
9af3c549 3249 exim_fail("exim: -q specified more than once\n");
059ec3d9
PH
3250
3251 /* -qq...: Do queue runs in a 2-stage manner */
3252
3253 if (*argrest == 'q')
3254 {
8768d548 3255 f.queue_2stage = TRUE;
059ec3d9
PH
3256 argrest++;
3257 }
3258
3259 /* -qi...: Do only first (initial) deliveries */
3260
3261 if (*argrest == 'i')
3262 {
8768d548 3263 f.queue_run_first_delivery = TRUE;
059ec3d9
PH
3264 argrest++;
3265 }
3266
3267 /* -qf...: Run the queue, forcing deliveries
3268 -qff..: Ditto, forcing thawing as well */
3269
3270 if (*argrest == 'f')
3271 {
8768d548 3272 f.queue_run_force = TRUE;
55e70e76 3273 if (*++argrest == 'f')
059ec3d9 3274 {
8768d548 3275 f.deliver_force_thaw = TRUE;
059ec3d9
PH
3276 argrest++;
3277 }
3278 }
3279
3280 /* -q[f][f]l...: Run the queue only on local deliveries */
3281
3282 if (*argrest == 'l')
3283 {
8768d548 3284 f.queue_run_local = TRUE;
059ec3d9
PH
3285 argrest++;
3286 }
3287
55e70e76 3288 /* -q[f][f][l][G<name>]... Work on the named queue */
28b3821f
JH
3289
3290 if (*argrest == 'G')
3291 {
fa665e0b
JH
3292 int i;
3293 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3294 queue_name = string_copyn(argrest, i);
3295 argrest += i;
3296 if (*argrest == '/') argrest++;
28b3821f
JH
3297 }
3298
3299 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3300 only, optionally named, optionally starting from a given message id. */
059ec3d9 3301
e5903596
JH
3302 if (!(list_queue || count_queue))
3303 if (*argrest == 0
3304 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3305 {
3306 queue_interval = 0;
3307 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3308 start_queue_run_id = argv[++i];
3309 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3310 stop_queue_run_id = argv[++i];
3311 }
059ec3d9 3312
fa665e0b
JH
3313 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3314 forced, optionally local only, optionally named. */
059ec3d9 3315
e5903596
JH
3316 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3317 0, FALSE)) <= 0)
3318 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
059ec3d9
PH
3319 break;
3320
3321
3322 case 'R': /* Synonymous with -qR... */
3323 receiving_message = FALSE;
3324
3325 /* -Rf: As -R (below) but force all deliveries,
3326 -Rff: Ditto, but also thaw all frozen messages,
3327 -Rr: String is regex
3328 -Rrf: Regex and force
3329 -Rrff: Regex and force and thaw
3330
3331 in all cases provided there are no further characters in this
3332 argument. */
3333
3334 if (*argrest != 0)
d7978c0f 3335 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3336 if (Ustrcmp(argrest, rsopts[i]) == 0)
3337 {
8768d548
JH
3338 if (i != 2) f.queue_run_force = TRUE;
3339 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3340 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3341 argrest += Ustrlen(rsopts[i]);
3342 }
059ec3d9
PH
3343
3344 /* -R: Set string to match in addresses for forced queue run to
3345 pick out particular messages. */
3346
55e70e76
JH
3347 if (*argrest)
3348 deliver_selectstring = argrest;
3349 else if (i+1 < argc)
3350 deliver_selectstring = argv[++i];
3351 else
9af3c549 3352 exim_fail("exim: string expected after -R\n");
059ec3d9
PH
3353 break;
3354
3355
3356 /* -r: an obsolete synonym for -f (see above) */
3357
3358
3359 /* -S: Like -R but works on sender. */
3360
3361 case 'S': /* Synonymous with -qS... */
3362 receiving_message = FALSE;
3363
3364 /* -Sf: As -S (below) but force all deliveries,
3365 -Sff: Ditto, but also thaw all frozen messages,
3366 -Sr: String is regex
3367 -Srf: Regex and force
3368 -Srff: Regex and force and thaw
3369
3370 in all cases provided there are no further characters in this
3371 argument. */
3372
55e70e76 3373 if (*argrest)
d7978c0f 3374 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3375 if (Ustrcmp(argrest, rsopts[i]) == 0)
3376 {
8768d548
JH
3377 if (i != 2) f.queue_run_force = TRUE;
3378 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3379 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3380 argrest += Ustrlen(rsopts[i]);
3381 }
059ec3d9
PH
3382
3383 /* -S: Set string to match in addresses for forced queue run to
3384 pick out particular messages. */
3385
55e70e76
JH
3386 if (*argrest)
3387 deliver_selectstring_sender = argrest;
3388 else if (i+1 < argc)
3389 deliver_selectstring_sender = argv[++i];
3390 else
9af3c549 3391 exim_fail("exim: string expected after -S\n");
059ec3d9
PH
3392 break;
3393
3394 /* -Tqt is an option that is exclusively for use by the testing suite.
3395 It is not recognized in other circumstances. It allows for the setting up
3396 of explicit "queue times" so that various warning/retry things can be
3397 tested. Otherwise variability of clock ticks etc. cause problems. */
3398
3399 case 'T':
8768d548 3400 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
059ec3d9
PH
3401 fudged_queue_times = argv[++i];
3402 else badarg = TRUE;
3403 break;
3404
3405
3406 /* -t: Set flag to extract recipients from body of message. */
3407
3408 case 't':
3409 if (*argrest == 0) extract_recipients = TRUE;
3410
3411 /* -ti: Set flag to extract recipients from body of message, and also
3412 specify that dot does not end the message. */
3413
3414 else if (Ustrcmp(argrest, "i") == 0)
3415 {
3416 extract_recipients = TRUE;
8768d548 3417 f.dot_ends = FALSE;
059ec3d9
PH
3418 }
3419
3420 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3421
01603eec 3422 #ifndef DISABLE_TLS
817d9f57 3423 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3424 #endif
3425
3426 else badarg = TRUE;
3427 break;
3428
3429
3430 /* -U: This means "initial user submission" in sendmail, apparently. The
3431 doc claims that in future sendmail may refuse syntactically invalid
3432 messages instead of fixing them. For the moment, we just ignore it. */
3433
3434 case 'U':
3435 break;
3436
3437
3438 /* -v: verify things - this is a very low-level debugging */
3439
3440 case 'v':
3441 if (*argrest == 0)
3442 {
3443 debug_selector |= D_v;
3444 debug_file = stderr;
3445 }
3446 else badarg = TRUE;
3447 break;
3448
3449
3450 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3451
3452 The -x flag tells the sendmail command that mail from a local
3453 mail program has National Language Support (NLS) extended characters
3454 in the body of the mail item. The sendmail command can send mail with
3455 extended NLS characters across networks that normally corrupts these
3456 8-bit characters.
3457
3458 As Exim is 8-bit clean, it just ignores this flag. */
3459
3460 case 'x':
3461 if (*argrest != 0) badarg = TRUE;
3462 break;
3463
a3fb9793
PP
3464 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3465 logs to that file. We swallow the parameter and otherwise ignore it. */
3466
3467 case 'X':
3468 if (*argrest == '\0')
a3fb9793 3469 if (++i >= argc)
9af3c549 3470 exim_fail("exim: string expected after -X\n");
0ad2e0fc
JH
3471 break;
3472
3473 case 'z':
3474 if (*argrest == '\0')
9af3c549
JH
3475 if (++i < argc)
3476 log_oneline = argv[i];
3477 else
3478 exim_fail("exim: file name expected after %s\n", argv[i-1]);
a3fb9793
PP
3479 break;
3480
059ec3d9
PH
3481 /* All other initial characters are errors */
3482
3483 default:
3484 badarg = TRUE;
3485 break;
3486 } /* End of high-level switch statement */
3487
3488 /* Failed to recognize the option, or syntax error */
3489
3490 if (badarg)
9af3c549 3491 exim_fail("exim abandoned: unknown, malformed, or incomplete "
059ec3d9 3492 "option %s\n", arg);
059ec3d9
PH
3493 }
3494
3495
3cc66b45
PH
3496/* If -R or -S have been specified without -q, assume a single queue run. */
3497
55e70e76
JH
3498if ( (deliver_selectstring || deliver_selectstring_sender)
3499 && queue_interval < 0)
3500 queue_interval = 0;
3cc66b45
PH
3501
3502
059ec3d9 3503END_ARG:
81ea09ca
NM
3504/* If usage_wanted is set we call the usage function - which never returns */
3505if (usage_wanted) exim_usage(called_as);
3506
3507/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3508if ((
3509 (smtp_input || extract_recipients || recipients_arg < argc) &&
8768d548 3510 (f.daemon_listen || queue_interval >= 0 || bi_option ||
059ec3d9 3511 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3512 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3513 ) ||
3514 (
3515 msg_action_arg > 0 &&
8768d548 3516 (f.daemon_listen || queue_interval > 0 || list_options ||
0ef732d9
PH
3517 (checking && msg_action != MSG_LOAD) ||
3518 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3519 ) ||
3520 (
8768d548 3521 (f.daemon_listen || queue_interval > 0) &&
059ec3d9 3522 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3523 bi_option)
059ec3d9
PH
3524 ) ||
3525 (
8768d548 3526 f.daemon_listen && queue_interval == 0
059ec3d9
PH
3527 ) ||
3528 (
8768d548 3529 f.inetd_wait_mode && queue_interval >= 0
9ee44efb
PP
3530 ) ||
3531 (
059ec3d9
PH
3532 list_options &&
3533 (checking || smtp_input || extract_recipients ||
f05da2e8 3534 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3535 ) ||
3536 (
3537 verify_address_mode &&
8768d548 3538 (f.address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3539 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3540 ) ||
3541 (
8768d548 3542 f.address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3543 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3544 ) ||
3545 (
f05da2e8 3546 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3547 extract_recipients)
3548 ) ||
3549 (
3550 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3551 ) ||
3552 (
3553 msg_action == MSG_LOAD &&
3554 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3555 )
3556 )
9af3c549 3557 exim_fail("exim: incompatible command-line options or arguments\n");
059ec3d9
PH
3558
3559/* If debugging is set up, set the file and the file descriptor to pass on to
3560child processes. It should, of course, be 2 for stderr. Also, force the daemon
3561to run in the foreground. */
3562
3563if (debug_selector != 0)
3564 {
3565 debug_file = stderr;
3566 debug_fd = fileno(debug_file);
8768d548 3567 f.background_daemon = FALSE;
9f01e50d 3568 testharness_pause_ms(100); /* lets caller finish */
059ec3d9
PH
3569 if (debug_selector != D_v) /* -v only doesn't show this */
3570 {
3571 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3572 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3573 debug_selector);
6545de78
PP
3574 if (!version_printed)
3575 show_whats_supported(stderr);
059ec3d9
PH
3576 }
3577 }
3578
3579/* When started with root privilege, ensure that the limits on the number of
3580open files and the number of processes (where that is accessible) are
3581sufficiently large, or are unset, in case Exim has been called from an
3582environment where the limits are screwed down. Not all OS have the ability to
3583change some of these limits. */
3584
3585if (unprivileged)
3586 {
3587 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3588 }
3589else
3590 {
3591 struct rlimit rlp;
3592
3593 #ifdef RLIMIT_NOFILE
3594 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3595 {
3596 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3597 strerror(errno));
3598 rlp.rlim_cur = rlp.rlim_max = 0;
3599 }
eb2c0248
PH
3600
3601 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3602 be exceeded. It turns out that some older OS have a fixed upper limit of
3603 256. */
eb2c0248 3604
059ec3d9
PH
3605 if (rlp.rlim_cur < 1000)
3606 {
3607 rlp.rlim_cur = rlp.rlim_max = 1000;
3608 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3609 {
a494b1e1
PH
3610 rlp.rlim_cur = rlp.rlim_max = 256;
3611 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3612 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3613 strerror(errno));
eb2c0248 3614 }
059ec3d9
PH
3615 }
3616 #endif
3617
3618 #ifdef RLIMIT_NPROC
3619 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3620 {
3621 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3622 strerror(errno));
3623 rlp.rlim_cur = rlp.rlim_max = 0;
3624 }
3625
3626 #ifdef RLIM_INFINITY
3627 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3628 {
3629 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3630 #else
3631 if (rlp.rlim_cur < 1000)
3632 {
3633 rlp.rlim_cur = rlp.rlim_max = 1000;
3634 #endif
3635 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3636 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3637 strerror(errno));
3638 }
3639 #endif
3640 }
3641
3642/* Exim is normally entered as root (but some special configurations are
3643possible that don't do this). However, it always spins off sub-processes that
3644set their uid and gid as required for local delivery. We don't want to pass on
3645any extra groups that root may belong to, so we want to get rid of them all at
3646this point.
3647
3648We need to obey setgroups() at this stage, before possibly giving up root
3649privilege for a changed configuration file, but later on we might need to
3650check on the additional groups for the admin user privilege - can't do that
3651till after reading the config, which might specify the exim gid. Therefore,
3652save the gr