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[exim.git] / src / src / exim.c
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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
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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/*************************************************
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73* Enums for cmdline interface *
74*************************************************/
75
76enum commandline_info { CMDINFO_NONE=0,
36a3ae5f 77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
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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
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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;
0f8ba377 312
6906c131 313if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
0f8ba377 314 return;
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315(void)sigemptyset(&sigmask); /* Empty mask */
316(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
317(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 318if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
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319 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
320 "setitimer() failed: %s", strerror(errno));
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321(void)sigfillset(&sigmask); /* All signals */
322(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
323(void)sigsuspend(&sigmask); /* Until SIGALRM */
324(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
325}
326
327
328
329
330/*************************************************
331* Millisecond sleep function *
332*************************************************/
333
334/* The basic sleep() function has a granularity of 1 second, which is too rough
335in some cases - for example, when using an increasing delay to slow down
336spammers.
337
338Argument: number of millseconds
339Returns: nothing
340*/
341
342void
343millisleep(int msec)
344{
345struct itimerval itval;
346itval.it_interval.tv_sec = 0;
347itval.it_interval.tv_usec = 0;
348itval.it_value.tv_sec = msec/1000;
349itval.it_value.tv_usec = (msec % 1000) * 1000;
350milliwait(&itval);
351}
352
353
354
355/*************************************************
356* Compare microsecond times *
357*************************************************/
358
359/*
360Arguments:
361 tv1 the first time
362 tv2 the second time
363
364Returns: -1, 0, or +1
365*/
366
32dfdf8b 367static int
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368exim_tvcmp(struct timeval *t1, struct timeval *t2)
369{
370if (t1->tv_sec > t2->tv_sec) return +1;
371if (t1->tv_sec < t2->tv_sec) return -1;
372if (t1->tv_usec > t2->tv_usec) return +1;
373if (t1->tv_usec < t2->tv_usec) return -1;
374return 0;
375}
376
377
378
379
380/*************************************************
381* Clock tick wait function *
382*************************************************/
383
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384#ifdef _POSIX_MONOTONIC_CLOCK
385/* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
386static struct timespec offset_ts;
387
388static void
389exim_clock_init(void)
390{
391struct timeval tv;
392if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
393(void)gettimeofday(&tv, NULL);
394offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
395offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
396if (offset_ts.tv_nsec >= 0) return;
397offset_ts.tv_sec--;
398offset_ts.tv_nsec += 1000*1000*1000;
399}
400#endif
401
402
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403/* Exim uses a time + a pid to generate a unique identifier in two places: its
404message IDs, and in file names for maildir deliveries. Because some OS now
405re-use pids within the same second, sub-second times are now being used.
4c04137d 406However, for absolute certainty, we must ensure the clock has ticked before
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407allowing the relevant process to complete. At the time of implementation of
408this code (February 2003), the speed of processors is such that the clock will
409invariably have ticked already by the time a process has done its job. This
410function prepares for the time when things are faster - and it also copes with
411clocks that go backwards.
412
413Arguments:
6906c131 414 tgt_tv A timeval which was used to create uniqueness; its usec field
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415 has been rounded down to the value of the resolution.
416 We want to be sure the current time is greater than this.
417 resolution The resolution that was used to divide the microseconds
418 (1 for maildir, larger for message ids)
419
420Returns: nothing
421*/
422
423void
6906c131 424exim_wait_tick(struct timeval * tgt_tv, int resolution)
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425{
426struct timeval now_tv;
427long int now_true_usec;
428
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429#ifdef _POSIX_MONOTONIC_CLOCK
430struct timespec now_ts;
431
432if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
433 {
434 now_ts.tv_sec += offset_ts.tv_sec;
435 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
436 {
437 now_ts.tv_sec++;
438 now_ts.tv_nsec -= 1000*1000*1000;
439 }
440 now_tv.tv_sec = now_ts.tv_sec;
441 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
442 now_tv.tv_usec = now_true_usec;
443 }
444else
445#endif
446 {
447 (void)gettimeofday(&now_tv, NULL);
448 now_true_usec = now_tv.tv_usec;
449 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
450 }
059ec3d9 451
6906c131 452while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
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453 {
454 struct itimerval itval;
455 itval.it_interval.tv_sec = 0;
456 itval.it_interval.tv_usec = 0;
6906c131
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457 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
458 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
059ec3d9
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459
460 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
461 negative value for the microseconds is possible only in the case when "now"
6906c131 462 is more than a second less than "tgt". That means that itval.it_value.tv_sec
059ec3d9
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463 is greater than zero. The following correction is therefore safe. */
464
465 if (itval.it_value.tv_usec < 0)
466 {
467 itval.it_value.tv_usec += 1000000;
468 itval.it_value.tv_sec -= 1;
469 }
470
471 DEBUG(D_transport|D_receive)
472 {
8768d548 473 if (!f.running_in_test_harness)
059ec3d9 474 {
d0291a0a 475 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
6906c131 476 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
7437665e 477 now_tv.tv_sec, (long) now_tv.tv_usec);
6906c131 478 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
d0291a0a 479 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
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480 }
481 }
482
483 milliwait(&itval);
fce5c23c
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484
485 /* Be prapared to go around if the kernel does not implement subtick
486 granularity (GNU Hurd) */
487
488 (void)gettimeofday(&now_tv, NULL);
489 now_true_usec = now_tv.tv_usec;
490 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
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491 }
492}
493
494
495
496
497/*************************************************
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498* Call fopen() with umask 777 and adjust mode *
499*************************************************/
500
501/* Exim runs with umask(0) so that files created with open() have the mode that
502is specified in the open() call. However, there are some files, typically in
503the spool directory, that are created with fopen(). They end up world-writeable
504if no precautions are taken. Although the spool directory is not accessible to
505the world, this is an untidiness. So this is a wrapper function for fopen()
506that sorts out the mode of the created file.
507
508Arguments:
509 filename the file name
510 options the fopen() options
511 mode the required mode
512
513Returns: the fopened FILE or NULL
514*/
515
516FILE *
1ba28e2b 517modefopen(const uschar *filename, const char *options, mode_t mode)
2632889e 518{
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519mode_t saved_umask = umask(0777);
520FILE *f = Ufopen(filename, options);
521(void)umask(saved_umask);
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522if (f != NULL) (void)fchmod(fileno(f), mode);
523return f;
524}
525
526
2632889e 527/*************************************************
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528* Ensure stdin, stdout, and stderr exist *
529*************************************************/
530
531/* Some operating systems grumble if an exec() happens without a standard
532input, output, and error (fds 0, 1, 2) being defined. The worry is that some
533file will be opened and will use these fd values, and then some other bit of
534code will assume, for example, that it can write error messages to stderr.
535This function ensures that fds 0, 1, and 2 are open if they do not already
536exist, by connecting them to /dev/null.
537
538This function is also used to ensure that std{in,out,err} exist at all times,
539so that if any library that Exim calls tries to use them, it doesn't crash.
540
541Arguments: None
542Returns: Nothing
543*/
544
545void
546exim_nullstd(void)
547{
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548int devnull = -1;
549struct stat statbuf;
d7978c0f 550for (int i = 0; i <= 2; i++)
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551 {
552 if (fstat(i, &statbuf) < 0 && errno == EBADF)
553 {
554 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
555 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
f3ebb786 556 string_open_failed(errno, "/dev/null", NULL));
1fe64dcc 557 if (devnull != i) (void)dup2(devnull, i);
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558 }
559 }
1fe64dcc 560if (devnull > 2) (void)close(devnull);
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561}
562
563
564
565
566/*************************************************
567* Close unwanted file descriptors for delivery *
568*************************************************/
569
570/* This function is called from a new process that has been forked to deliver
571an incoming message, either directly, or using exec.
572
573We want any smtp input streams to be closed in this new process. However, it
574has been observed that using fclose() here causes trouble. When reading in -bS
575input, duplicate copies of messages have been seen. The files will be sharing a
576file pointer with the parent process, and it seems that fclose() (at least on
577some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
578least sometimes. Hence we go for closing the underlying file descriptors.
579
580If TLS is active, we want to shut down the TLS library, but without molesting
581the parent's SSL connection.
582
583For delivery of a non-SMTP message, we want to close stdin and stdout (and
584stderr unless debugging) because the calling process might have set them up as
585pipes and be waiting for them to close before it waits for the submission
586process to terminate. If they aren't closed, they hold up the calling process
587until the initial delivery process finishes, which is not what we want.
588
589Exception: We do want it for synchronous delivery!
590
591And notwithstanding all the above, if D_resolver is set, implying resolver
592debugging, leave stdout open, because that's where the resolver writes its
593debugging output.
594
595When we close stderr (which implies we've also closed stdout), we also get rid
596of any controlling terminal.
597
598Arguments: None
599Returns: Nothing
600*/
601
602static void
603close_unwanted(void)
604{
605if (smtp_input)
606 {
01603eec 607#ifndef DISABLE_TLS
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608 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
609#endif
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610 (void)close(fileno(smtp_in));
611 (void)close(fileno(smtp_out));
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612 smtp_in = NULL;
613 }
614else
615 {
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616 (void)close(0); /* stdin */
617 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
618 if (debug_selector == 0) /* stderr */
059ec3d9 619 {
8768d548 620 if (!f.synchronous_delivery)
059ec3d9 621 {
1fe64dcc 622 (void)close(2);
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623 log_stderr = NULL;
624 }
625 (void)setsid();
626 }
627 }
628}
629
630
631
632
633/*************************************************
634* Set uid and gid *
635*************************************************/
636
637/* This function sets a new uid and gid permanently, optionally calling
638initgroups() to set auxiliary groups. There are some special cases when running
639Exim in unprivileged modes. In these situations the effective uid will not be
640root; if we already have the right effective uid/gid, and don't need to
641initialize any groups, leave things as they are.
642
643Arguments:
644 uid the uid
645 gid the gid
646 igflag TRUE if initgroups() wanted
647 msg text to use in debugging output and failure log
648
649Returns: nothing; bombs out on failure
650*/
651
652void
653exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
654{
655uid_t euid = geteuid();
656gid_t egid = getegid();
657
658if (euid == root_uid || euid != uid || egid != gid || igflag)
659 {
660 /* At least one OS returns +1 for initgroups failure, so just check for
661 non-zero. */
662
663 if (igflag)
664 {
665 struct passwd *pw = getpwuid(uid);
9af3c549
JH
666 if (!pw)
667 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
668 "no passwd entry for uid=%ld", (long int)uid);
669
670 if (initgroups(pw->pw_name, gid) != 0)
671 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
672 (long int)uid, strerror(errno));
059ec3d9
PH
673 }
674
675 if (setgid(gid) < 0 || setuid(uid) < 0)
059ec3d9
PH
676 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
677 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
059ec3d9
PH
678 }
679
680/* Debugging output included uid/gid and all groups */
681
682DEBUG(D_uid)
683 {
cd59ab18 684 int group_count, save_errno;
157d73b5 685 gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9
PH
686 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
687 (long int)geteuid(), (long int)getegid(), (long int)getpid());
157d73b5 688 group_count = getgroups(nelem(group_list), group_list);
cd59ab18 689 save_errno = errno;
059ec3d9
PH
690 debug_printf(" auxiliary group list:");
691 if (group_count > 0)
d7978c0f 692 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
cd59ab18
PP
693 else if (group_count < 0)
694 debug_printf(" <error: %s>", strerror(save_errno));
059ec3d9
PH
695 else debug_printf(" <none>");
696 debug_printf("\n");
697 }
698}
699
700
701
702
703/*************************************************
704* Exit point *
705*************************************************/
706
707/* Exim exits via this function so that it always clears up any open
708databases.
709
710Arguments:
711 rc return code
712
713Returns: does not return
714*/
715
716void
9bfb7e1b 717exim_exit(int rc, const uschar * process)
059ec3d9
PH
718{
719search_tidyup();
f3ebb786 720store_exit();
059ec3d9 721DEBUG(D_any)
9bfb7e1b
JH
722 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
723 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
724 process ? "(" : "", process, process ? ") " : "", rc);
059ec3d9
PH
725exit(rc);
726}
727
728
f3ebb786
JH
729void
730exim_underbar_exit(int rc)
731{
732store_exit();
733_exit(rc);
734}
735
736
059ec3d9 737
9af3c549
JH
738/* Print error string, then die */
739static void
740exim_fail(const char * fmt, ...)
741{
742va_list ap;
743va_start(ap, fmt);
744vfprintf(stderr, fmt, ap);
745exit(EXIT_FAILURE);
746}
747
b66fecb4
HSHR
748/* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
749of chown()/fchown(). See src/functions.h for more explanation */
750int
751exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
752{
ecf14f2a 753int saved_errno = errno; /* from the preceeding chown call */
b66fecb4
HSHR
754#if 1
755log_write(0, LOG_MAIN|LOG_PANIC,
756 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
757 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
758 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
759#else
760/* I leave this here, commented, in case the "bug"(?) comes up again.
761 It is not an Exim bug, but we can provide a workaround.
762 See Bug 2391
763 HS 2019-04-18 */
764
b66fecb4
HSHR
765struct stat buf;
766
767if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
768{
769 if (buf.st_uid == owner && buf.st_gid == group) return 0;
770 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
771}
772else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
773
ecf14f2a 774#endif
b66fecb4
HSHR
775errno = saved_errno;
776return -1;
b66fecb4 777}
9af3c549 778
059ec3d9
PH
779
780/*************************************************
781* Extract port from host address *
782*************************************************/
783
784/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
PH
785It also checks the syntax of the address, and terminates it before the
786port data when a port is extracted.
059ec3d9
PH
787
788Argument:
789 address the address, with possible port on the end
790
791Returns: the port, or zero if there isn't one
792 bombs out on a syntax error
793*/
794
795static int
796check_port(uschar *address)
797{
7cd1141b 798int port = host_address_extract_port(address);
8e669ac1 799if (string_is_ip_address(address, NULL) == 0)
9af3c549 800 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
059ec3d9
PH
801return port;
802}
803
804
805
806/*************************************************
807* Test/verify an address *
808*************************************************/
809
810/* This function is called by the -bv and -bt code. It extracts a working
811address from a full RFC 822 address. This isn't really necessary per se, but it
812has the effect of collapsing source routes.
813
814Arguments:
815 s the address string
816 flags flag bits for verify_address()
817 exit_value to be set for failures
818
a5a28604 819Returns: nothing
059ec3d9
PH
820*/
821
822static void
823test_address(uschar *s, int flags, int *exit_value)
824{
825int start, end, domain;
826uschar *parse_error = NULL;
827uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
828 FALSE);
829if (address == NULL)
830 {
831 fprintf(stdout, "syntax error: %s\n", parse_error);
832 *exit_value = 2;
833 }
834else
835 {
836 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 837 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
838 if (rc == FAIL) *exit_value = 2;
839 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
840 }
841}
842
843
844
845/*************************************************
059ec3d9
PH
846* Show supported features *
847*************************************************/
848
059ec3d9 849static void
96508de1 850show_db_version(FILE * f)
059ec3d9
PH
851{
852#ifdef DB_VERSION_STRING
96508de1
JH
853DEBUG(D_any)
854 {
855 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
856 fprintf(f, " Runtime: %s\n",
857 db_version(NULL, NULL, NULL));
858 }
859else
860 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
861
059ec3d9
PH
862#elif defined(BTREEVERSION) && defined(HASHVERSION)
863 #ifdef USE_DB
864 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
865 #else
866 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
867 #endif
96508de1 868
059ec3d9
PH
869#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
870fprintf(f, "Probably ndbm\n");
871#elif defined(USE_TDB)
872fprintf(f, "Using tdb\n");
873#else
874 #ifdef USE_GDBM
875 fprintf(f, "Probably GDBM (native mode)\n");
876 #else
877 fprintf(f, "Probably GDBM (compatibility mode)\n");
878 #endif
879#endif
96508de1
JH
880}
881
882
883/* This function is called for -bV/--version and for -d to output the optional
884features of the current Exim binary.
885
886Arguments: a FILE for printing
887Returns: nothing
888*/
889
890static void
8768d548 891show_whats_supported(FILE * fp)
96508de1 892{
8768d548 893DEBUG(D_any) {} else show_db_version(fp);
059ec3d9 894
8768d548 895fprintf(fp, "Support for:");
9cec981f 896#ifdef SUPPORT_CRYPTEQ
8768d548 897 fprintf(fp, " crypteq");
9cec981f 898#endif
059ec3d9 899#if HAVE_ICONV
8768d548 900 fprintf(fp, " iconv()");
059ec3d9
PH
901#endif
902#if HAVE_IPV6
8768d548 903 fprintf(fp, " IPv6");
059ec3d9 904#endif
79378e0f 905#ifdef HAVE_SETCLASSRESOURCES
8768d548 906 fprintf(fp, " use_setclassresources");
929ba01c 907#endif
059ec3d9 908#ifdef SUPPORT_PAM
8768d548 909 fprintf(fp, " PAM");
059ec3d9
PH
910#endif
911#ifdef EXIM_PERL
8768d548 912 fprintf(fp, " Perl");
059ec3d9 913#endif
1a46a8c5 914#ifdef EXPAND_DLFUNC
8768d548 915 fprintf(fp, " Expand_dlfunc");
1a46a8c5 916#endif
059ec3d9 917#ifdef USE_TCP_WRAPPERS
8768d548 918 fprintf(fp, " TCPwrappers");
059ec3d9 919#endif
de517fd3 920#ifdef USE_GNUTLS
8768d548 921 fprintf(fp, " GnuTLS");
de517fd3
JH
922#endif
923#ifdef USE_OPENSSL
8768d548 924 fprintf(fp, " OpenSSL");
059ec3d9 925#endif
b2f5a032 926#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
8768d548 927 fprintf(fp, " translate_ip_address");
b2f5a032 928#endif
f174f16e 929#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
8768d548 930 fprintf(fp, " move_frozen_messages");
f174f16e 931#endif
8523533c 932#ifdef WITH_CONTENT_SCAN
8768d548 933 fprintf(fp, " Content_Scanning");
8523533c 934#endif
c0635b6d 935#ifdef SUPPORT_DANE
8768d548 936 fprintf(fp, " DANE");
c0635b6d 937#endif
74f150bf 938#ifndef DISABLE_DKIM
8768d548 939 fprintf(fp, " DKIM");
74f150bf 940#endif
ef1bbb27 941#ifndef DISABLE_DNSSEC
8768d548 942 fprintf(fp, " DNSSEC");
ef1bbb27 943#endif
0cbf2b82 944#ifndef DISABLE_EVENT
8768d548 945 fprintf(fp, " Event");
0cbf2b82 946#endif
8c5d388a 947#ifdef SUPPORT_I18N
8768d548 948 fprintf(fp, " I18N");
8c5d388a 949#endif
74f150bf 950#ifndef DISABLE_OCSP
8768d548 951 fprintf(fp, " OCSP");
74f150bf 952#endif
81344b40 953#ifndef DISABLE_PIPE_CONNECT
4e48d56c
JH
954 fprintf(fp, " PIPE_CONNECT");
955#endif
4d832da1 956#ifndef DISABLE_PRDR
8768d548 957 fprintf(fp, " PRDR");
4d832da1 958#endif
cee5f132 959#ifdef SUPPORT_PROXY
8768d548 960 fprintf(fp, " PROXY");
cee5f132 961#endif
f0989ec0 962#ifdef SUPPORT_SOCKS
8768d548 963 fprintf(fp, " SOCKS");
f2de3a33 964#endif
7952eef9 965#ifdef SUPPORT_SPF
8768d548 966 fprintf(fp, " SPF");
7952eef9 967#endif
1a2e76e1
JH
968#ifdef SUPPORT_DMARC
969 fprintf(fp, " DMARC");
970#endif
1a2dfad5 971#ifdef TCP_FASTOPEN
d85cdeb5 972 tcp_init();
8768d548 973 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
1a2dfad5 974#endif
5bde3efa 975#ifdef EXPERIMENTAL_LMDB
8768d548 976 fprintf(fp, " Experimental_LMDB");
5bde3efa 977#endif
3369a853 978#ifdef EXPERIMENTAL_QUEUEFILE
8768d548 979 fprintf(fp, " Experimental_QUEUEFILE");
3369a853 980#endif
7ef88aa0 981#if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
8768d548 982 fprintf(fp, " Experimental_SRS");
8523533c 983#endif
617d3932 984#ifdef EXPERIMENTAL_ARC
8768d548 985 fprintf(fp, " Experimental_ARC");
617d3932 986#endif
8523533c 987#ifdef EXPERIMENTAL_BRIGHTMAIL
8768d548 988 fprintf(fp, " Experimental_Brightmail");
8523533c 989#endif
6a8f9482 990#ifdef EXPERIMENTAL_DCC
8768d548 991 fprintf(fp, " Experimental_DCC");
6a8f9482 992#endif
895fbaf2 993#ifdef EXPERIMENTAL_DSN_INFO
8768d548 994 fprintf(fp, " Experimental_DSN_info");
895fbaf2 995#endif
b10c87b3
JH
996#ifdef EXPERIMENTAL_TLS_RESUME
997 fprintf(fp, " Experimental_TLS_resume");
998#endif
8768d548 999fprintf(fp, "\n");
059ec3d9 1000
8768d548 1001fprintf(fp, "Lookups (built-in):");
e6d225ae 1002#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
8768d548 1003 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
059ec3d9 1004#endif
e6d225ae 1005#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
8768d548 1006 fprintf(fp, " cdb");
059ec3d9 1007#endif
e6d225ae 1008#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
8768d548 1009 fprintf(fp, " dbm dbmjz dbmnz");
059ec3d9 1010#endif
e6d225ae 1011#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
8768d548 1012 fprintf(fp, " dnsdb");
059ec3d9 1013#endif
e6d225ae 1014#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
8768d548 1015 fprintf(fp, " dsearch");
059ec3d9 1016#endif
e6d225ae 1017#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
8768d548 1018 fprintf(fp, " ibase");
059ec3d9 1019#endif
ffc92d69
JH
1020#if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1021 fprintf(fp, " json");
1022#endif
e6d225ae 1023#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
8768d548 1024 fprintf(fp, " ldap ldapdn ldapm");
059ec3d9 1025#endif
5bde3efa 1026#ifdef EXPERIMENTAL_LMDB
8768d548 1027 fprintf(fp, " lmdb");
5bde3efa 1028#endif
e6d225ae 1029#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
8768d548 1030 fprintf(fp, " mysql");
059ec3d9 1031#endif
e6d225ae 1032#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
8768d548 1033 fprintf(fp, " nis nis0");
059ec3d9 1034#endif
e6d225ae 1035#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
8768d548 1036 fprintf(fp, " nisplus");
059ec3d9 1037#endif
e6d225ae 1038#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
8768d548 1039 fprintf(fp, " oracle");
059ec3d9 1040#endif
e6d225ae 1041#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
8768d548 1042 fprintf(fp, " passwd");
059ec3d9 1043#endif
e6d225ae 1044#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
8768d548 1045 fprintf(fp, " pgsql");
059ec3d9 1046#endif
de78e2d5 1047#if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
8768d548 1048 fprintf(fp, " redis");
de78e2d5 1049#endif
e6d225ae 1050#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
8768d548 1051 fprintf(fp, " sqlite");
13b685f9 1052#endif
e6d225ae 1053#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
8768d548 1054 fprintf(fp, " testdb");
059ec3d9 1055#endif
e6d225ae 1056#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
8768d548 1057 fprintf(fp, " whoson");
059ec3d9 1058#endif
8768d548 1059fprintf(fp, "\n");
059ec3d9 1060
8768d548
JH
1061auth_show_supported(fp);
1062route_show_supported(fp);
1063transport_show_supported(fp);
059ec3d9 1064
c11d665d 1065#ifdef WITH_CONTENT_SCAN
8768d548 1066malware_show_supported(fp);
c11d665d
JH
1067#endif
1068
059ec3d9
PH
1069if (fixed_never_users[0] > 0)
1070 {
1071 int i;
8768d548 1072 fprintf(fp, "Fixed never_users: ");
059ec3d9 1073 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
8768d548
JH
1074 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1075 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
059ec3d9 1076 }
21c28500 1077
8768d548 1078fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
19bfe9e7 1079
8768d548 1080fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 1081
6545de78
PP
1082/* Everything else is details which are only worth reporting when debugging.
1083Perhaps the tls_version_report should move into this too. */
1084DEBUG(D_any) do {
1085
b3c261f7
PP
1086/* clang defines __GNUC__ (at least, for me) so test for it first */
1087#if defined(__clang__)
8768d548 1088 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
b3c261f7 1089#elif defined(__GNUC__)
8768d548 1090 fprintf(fp, "Compiler: GCC [%s]\n",
b3c261f7
PP
1091# ifdef __VERSION__
1092 __VERSION__
1093# else
1094 "? unknown version ?"
1095# endif
1096 );
1097#else
8768d548 1098 fprintf(fp, "Compiler: <unknown>\n");
b3c261f7
PP
1099#endif
1100
98913c8e 1101#if defined(__GLIBC__) && !defined(__UCLIBC__)
8768d548 1102 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
01f3091a
JH
1103 __GLIBC__, __GLIBC_MINOR__);
1104 if (__GLIBC_PREREQ(2, 1))
8768d548 1105 fprintf(fp, " Runtime: %s\n",
01f3091a
JH
1106 gnu_get_libc_version());
1107#endif
1108
8768d548 1109show_db_version(fp);
96508de1 1110
01603eec 1111#ifndef DISABLE_TLS
8768d548 1112 tls_version_report(fp);
754a0503 1113#endif
8c5d388a 1114#ifdef SUPPORT_I18N
8768d548 1115 utf8_version_report(fp);
b04be5e7 1116#endif
85e453f6
JH
1117#ifdef SUPPORT_SPF
1118 spf_lib_version_report(fp);
1119#endif
754a0503 1120
d7978c0f 1121 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
fc362fc5 1122 if (authi->version_report)
8768d548 1123 (*authi->version_report)(fp);
6545de78 1124
decd95cb 1125 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1126 characters; unless it's an ancient version of PCRE in which case it
1127 is not defined. */
1128#ifndef PCRE_PRERELEASE
01f3091a 1129# define PCRE_PRERELEASE
6475bd82
PP
1130#endif
1131#define QUOTE(X) #X
1132#define EXPAND_AND_QUOTE(X) QUOTE(X)
8768d548 1133 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
6545de78
PP
1134 " Runtime: %s\n",
1135 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1136 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1137 pcre_version());
6475bd82
PP
1138#undef QUOTE
1139#undef EXPAND_AND_QUOTE
6545de78
PP
1140
1141 init_lookup_list();
d7978c0f 1142 for (int i = 0; i < lookup_list_count; i++)
6545de78 1143 if (lookup_list[i]->version_report)
8768d548 1144 lookup_list[i]->version_report(fp);
6545de78 1145
b70d2586 1146#ifdef WHITELIST_D_MACROS
8768d548 1147 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
b70d2586 1148#else
8768d548 1149 fprintf(fp, "WHITELIST_D_MACROS unset\n");
b70d2586
PP
1150#endif
1151#ifdef TRUSTED_CONFIG_LIST
8768d548 1152 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
b70d2586 1153#else
8768d548 1154 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
b70d2586
PP
1155#endif
1156
6545de78 1157} while (0);
059ec3d9
PH
1158}
1159
1160
98a90c36
PP
1161/*************************************************
1162* Show auxiliary information about Exim *
1163*************************************************/
1164
1165static void
1166show_exim_information(enum commandline_info request, FILE *stream)
1167{
98a90c36
PP
1168switch(request)
1169 {
1170 case CMDINFO_NONE:
1171 fprintf(stream, "Oops, something went wrong.\n");
1172 return;
1173 case CMDINFO_HELP:
1174 fprintf(stream,
1175"The -bI: flag takes a string indicating which information to provide.\n"
1176"If the string is not recognised, you'll get this help (on stderr).\n"
1177"\n"
1178" exim -bI:help this information\n"
030caf2a
JS
1179" exim -bI:dscp list of known dscp value keywords\n"
1180" exim -bI:sieve list of supported sieve extensions\n"
98a90c36
PP
1181);
1182 return;
1183 case CMDINFO_SIEVE:
d7978c0f 1184 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
98a90c36
PP
1185 fprintf(stream, "%s\n", *pp);
1186 return;
36a3ae5f
PP
1187 case CMDINFO_DSCP:
1188 dscp_list_to_stream(stream);
1189 return;
98a90c36
PP
1190 }
1191}
059ec3d9
PH
1192
1193
1194/*************************************************
1195* Quote a local part *
1196*************************************************/
1197
1198/* This function is used when a sender address or a From: or Sender: header
1199line is being created from the caller's login, or from an authenticated_id. It
1200applies appropriate quoting rules for a local part.
1201
1202Argument: the local part
1203Returns: the local part, quoted if necessary
1204*/
1205
1206uschar *
1207local_part_quote(uschar *lpart)
1208{
1209BOOL needs_quote = FALSE;
acec9514 1210gstring * g;
059ec3d9 1211
d7978c0f 1212for (uschar * t = lpart; !needs_quote && *t != 0; t++)
059ec3d9
PH
1213 {
1214 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1215 (*t != '.' || t == lpart || t[1] == 0);
1216 }
1217
1218if (!needs_quote) return lpart;
1219
acec9514 1220g = string_catn(NULL, US"\"", 1);
059ec3d9
PH
1221
1222for (;;)
1223 {
1224 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1225 if (nq == NULL)
1226 {
acec9514 1227 g = string_cat(g, lpart);
059ec3d9
PH
1228 break;
1229 }
acec9514
JH
1230 g = string_catn(g, lpart, nq - lpart);
1231 g = string_catn(g, US"\\", 1);
1232 g = string_catn(g, nq, 1);
059ec3d9
PH
1233 lpart = nq + 1;
1234 }
1235
acec9514
JH
1236g = string_catn(g, US"\"", 1);
1237return string_from_gstring(g);
059ec3d9
PH
1238}
1239
1240
1241
1242#ifdef USE_READLINE
1243/*************************************************
1244* Load readline() functions *
1245*************************************************/
1246
1247/* This function is called from testing executions that read data from stdin,
1248but only when running as the calling user. Currently, only -be does this. The
1249function loads the readline() function library and passes back the functions.
1250On some systems, it needs the curses library, so load that too, but try without
1251it if loading fails. All this functionality has to be requested at build time.
1252
1253Arguments:
1254 fn_readline_ptr pointer to where to put the readline pointer
1255 fn_addhist_ptr pointer to where to put the addhistory function
1256
1257Returns: the dlopen handle or NULL on failure
1258*/
1259
1260static void *
1ba28e2b
PP
1261set_readline(char * (**fn_readline_ptr)(const char *),
1262 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1263{
1264void *dlhandle;
e12f8c32 1265void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1266
e12f8c32 1267dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
b1c673dd 1268if (dlhandle_curses) dlclose(dlhandle_curses);
059ec3d9 1269
b1c673dd 1270if (dlhandle)
059ec3d9 1271 {
1ba28e2b
PP
1272 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1273 * char * readline (const char *prompt);
1274 * void add_history (const char *string);
1275 */
1276 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1277 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1278 }
1279else
059ec3d9 1280 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
059ec3d9
PH
1281
1282return dlhandle;
1283}
1284#endif
1285
1286
1287
1288/*************************************************
1289* Get a line from stdin for testing things *
1290*************************************************/
1291
1292/* This function is called when running tests that can take a number of lines
1293of input (for example, -be and -bt). It handles continuations and trailing
1294spaces. And prompting and a blank line output on eof. If readline() is in use,
1295the arguments are non-NULL and provide the relevant functions.
1296
1297Arguments:
1298 fn_readline readline function or NULL
1299 fn_addhist addhist function or NULL
1300
1301Returns: pointer to dynamic memory, or NULL at end of file
1302*/
1303
1304static uschar *
1ba28e2b 1305get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9 1306{
acec9514 1307gstring * g = NULL;
059ec3d9 1308
acec9514 1309if (!fn_readline) { printf("> "); fflush(stdout); }
059ec3d9 1310
d7978c0f 1311for (int i = 0;; i++)
059ec3d9
PH
1312 {
1313 uschar buffer[1024];
1314 uschar *p, *ss;
1315
1316 #ifdef USE_READLINE
1317 char *readline_line = NULL;
f3ebb786 1318 if (fn_readline)
059ec3d9 1319 {
f3ebb786
JH
1320 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1321 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
059ec3d9
PH
1322 p = US readline_line;
1323 }
1324 else
1325 #endif
1326
1327 /* readline() not in use */
1328
1329 {
1330 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1331 p = buffer;
1332 }
1333
1334 /* Handle the line */
1335
1336 ss = p + (int)Ustrlen(p);
1337 while (ss > p && isspace(ss[-1])) ss--;
1338
1339 if (i > 0)
059ec3d9 1340 while (p < ss && isspace(*p)) p++; /* leading space after cont */
059ec3d9 1341
acec9514 1342 g = string_catn(g, p, ss - p);
059ec3d9
PH
1343
1344 #ifdef USE_READLINE
acec9514 1345 if (fn_readline) free(readline_line);
059ec3d9
PH
1346 #endif
1347
acec9514
JH
1348 /* g can only be NULL if ss==p */
1349 if (ss == p || g->s[g->ptr-1] != '\\')
059ec3d9 1350 break;
acec9514
JH
1351
1352 --g->ptr;
1353 (void) string_from_gstring(g);
059ec3d9
PH
1354 }
1355
acec9514
JH
1356if (!g) printf("\n");
1357return string_from_gstring(g);
059ec3d9
PH
1358}
1359
1360
1361
1362/*************************************************
81ea09ca
NM
1363* Output usage information for the program *
1364*************************************************/
1365
1366/* This function is called when there are no recipients
1367 or a specific --help argument was added.
1368
1369Arguments:
1370 progname information on what name we were called by
1371
1372Returns: DOES NOT RETURN
1373*/
1374
1375static void
1376exim_usage(uschar *progname)
1377{
1378
4c04137d 1379/* Handle specific program invocation variants */
81ea09ca 1380if (Ustrcmp(progname, US"-mailq") == 0)
9af3c549 1381 exim_fail(
e765a0f1 1382 "mailq - list the contents of the mail queue\n\n"
81ea09ca 1383 "For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1384
1385/* Generic usage - we output this whatever happens */
9af3c549 1386exim_fail(
81ea09ca
NM
1387 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1388 "not directly from a shell command line. Options and/or arguments control\n"
1389 "what it does when called. For a list of options, see the Exim documentation.\n");
81ea09ca
NM
1390}
1391
1392
1393
1394/*************************************************
a7cbbf50
PP
1395* Validate that the macros given are okay *
1396*************************************************/
1397
1398/* Typically, Exim will drop privileges if macros are supplied. In some
1399cases, we want to not do so.
1400
a4034eb8 1401Arguments: opt_D_used - true if the commandline had a "-D" option
a7cbbf50
PP
1402Returns: true if trusted, false otherwise
1403*/
1404
1405static BOOL
a4034eb8 1406macros_trusted(BOOL opt_D_used)
a7cbbf50
PP
1407{
1408#ifdef WHITELIST_D_MACROS
d7978c0f 1409uschar *whitelisted, *end, *p, **whites;
a7cbbf50
PP
1410int white_count, i, n;
1411size_t len;
1412BOOL prev_char_item, found;
1413#endif
1414
a4034eb8 1415if (!opt_D_used)
a7cbbf50
PP
1416 return TRUE;
1417#ifndef WHITELIST_D_MACROS
1418return FALSE;
1419#else
1420
66581d1e
PP
1421/* We only trust -D overrides for some invoking users:
1422root, the exim run-time user, the optional config owner user.
1423I don't know why config-owner would be needed, but since they can own the
1424config files anyway, there's no security risk to letting them override -D. */
1425if ( ! ((real_uid == root_uid)
1426 || (real_uid == exim_uid)
1427#ifdef CONFIGURE_OWNER
1428 || (real_uid == config_uid)
1429#endif
1430 ))
1431 {
1432 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1433 return FALSE;
1434 }
1435
a7cbbf50 1436/* Get a list of macros which are whitelisted */
f3ebb786 1437whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
a7cbbf50
PP
1438prev_char_item = FALSE;
1439white_count = 0;
1440for (p = whitelisted; *p != '\0'; ++p)
1441 {
1442 if (*p == ':' || isspace(*p))
1443 {
1444 *p = '\0';
1445 if (prev_char_item)
1446 ++white_count;
1447 prev_char_item = FALSE;
1448 continue;
1449 }
1450 if (!prev_char_item)
1451 prev_char_item = TRUE;
1452 }
1453end = p;
1454if (prev_char_item)
1455 ++white_count;
1456if (!white_count)
1457 return FALSE;
1458whites = store_malloc(sizeof(uschar *) * (white_count+1));
1459for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1460 {
1461 if (*p != '\0')
1462 {
1463 whites[i++] = p;
1464 if (i == white_count)
1465 break;
1466 while (*p != '\0' && p < end)
1467 ++p;
1468 }
1469 }
1470whites[i] = NULL;
1471
1a7c9a48
JH
1472/* The list of commandline macros should be very short.
1473Accept the N*M complexity. */
d7978c0f 1474for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1a7c9a48
JH
1475 {
1476 found = FALSE;
d7978c0f 1477 for (uschar ** w = whites; *w; ++w)
1a7c9a48
JH
1478 if (Ustrcmp(*w, m->name) == 0)
1479 {
1480 found = TRUE;
1481 break;
1482 }
1483 if (!found)
1484 return FALSE;
1485 if (!m->replacement)
1486 continue;
1487 if ((len = m->replen) == 0)
1488 continue;
1489 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1490 0, PCRE_EOPT, NULL, 0);
1491 if (n < 0)
1492 {
1493 if (n != PCRE_ERROR_NOMATCH)
1494 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1495 return FALSE;
1496 }
1497 }
43236f35 1498DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1499return TRUE;
1500#endif
1501}
1502
1503
1504/*************************************************
9650d98a
JH
1505* Expansion testing *
1506*************************************************/
1507
1508/* Expand and print one item, doing macro-processing.
1509
1510Arguments:
1511 item line for expansion
1512*/
1513
1514static void
1515expansion_test_line(uschar * line)
1516{
1517int len;
1518BOOL dummy_macexp;
1519
1520Ustrncpy(big_buffer, line, big_buffer_size);
1521big_buffer[big_buffer_size-1] = '\0';
1522len = Ustrlen(big_buffer);
1523
1524(void) macros_expand(0, &len, &dummy_macexp);
1525
1526if (isupper(big_buffer[0]))
1527 {
1528 if (macro_read_assignment(big_buffer))
1a7c9a48 1529 printf("Defined macro '%s'\n", mlast->name);
9650d98a
JH
1530 }
1531else
1532 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1533 else printf("Failed: %s\n", expand_string_message);
1534}
1535
1536
9af3c549 1537
9650d98a 1538/*************************************************
059ec3d9
PH
1539* Entry point and high-level code *
1540*************************************************/
1541
1542/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1543the appropriate action. All the necessary functions are present in the one
1544binary. I originally thought one should split it up, but it turns out that so
1545much of the apparatus is needed in each chunk that one might as well just have
1546it all available all the time, which then makes the coding easier as well.
1547
1548Arguments:
1549 argc count of entries in argv
1550 argv argument strings, with argv[0] being the program name
1551
1552Returns: EXIT_SUCCESS if terminated successfully
1553 EXIT_FAILURE otherwise, except when a message has been sent
1554 to the sender, and -oee was given
1555*/
1556
1557int
1558main(int argc, char **cargv)
1559{
1560uschar **argv = USS cargv;
1561int arg_receive_timeout = -1;
1562int arg_smtp_receive_timeout = -1;
1563int arg_error_handling = error_handling;
f05da2e8
PH
1564int filter_sfd = -1;
1565int filter_ufd = -1;
059ec3d9 1566int group_count;
1670ef10 1567int i, rv;
059ec3d9
PH
1568int list_queue_option = 0;
1569int msg_action = 0;
1570int msg_action_arg = -1;
1571int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1572int queue_only_reason = 0;
1573#ifdef EXIM_PERL
1574int perl_start_option = 0;
1575#endif
1576int recipients_arg = argc;
1577int sender_address_domain = 0;
1578int test_retry_arg = -1;
1579int test_rewrite_arg = -1;
3b7ac02c 1580gid_t original_egid;
059ec3d9
PH
1581BOOL arg_queue_only = FALSE;
1582BOOL bi_option = FALSE;
1583BOOL checking = FALSE;
1584BOOL count_queue = FALSE;
1585BOOL expansion_test = FALSE;
1586BOOL extract_recipients = FALSE;
f4ee74ac 1587BOOL flag_G = FALSE;
12f69989 1588BOOL flag_n = FALSE;
059ec3d9
PH
1589BOOL forced_delivery = FALSE;
1590BOOL f_end_dot = FALSE;
1591BOOL deliver_give_up = FALSE;
1592BOOL list_queue = FALSE;
1593BOOL list_options = FALSE;
bf3c2c6b 1594BOOL list_config = FALSE;
059ec3d9
PH
1595BOOL local_queue_only;
1596BOOL more = TRUE;
1597BOOL one_msg_action = FALSE;
4ab69ec7 1598BOOL opt_D_used = FALSE;
059ec3d9
PH
1599BOOL queue_only_set = FALSE;
1600BOOL receiving_message = TRUE;
33d73e3b 1601BOOL sender_ident_set = FALSE;
8669f003 1602BOOL session_local_queue_only;
059ec3d9
PH
1603BOOL unprivileged;
1604BOOL removed_privilege = FALSE;
81ea09ca 1605BOOL usage_wanted = FALSE;
059ec3d9
PH
1606BOOL verify_address_mode = FALSE;
1607BOOL verify_as_sender = FALSE;
1608BOOL version_printed = FALSE;
1609uschar *alias_arg = NULL;
1610uschar *called_as = US"";
a3fb9793 1611uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1612uschar *start_queue_run_id = NULL;
1613uschar *stop_queue_run_id = NULL;
328895cc 1614uschar *expansion_test_message = NULL;
059ec3d9
PH
1615uschar *ftest_domain = NULL;
1616uschar *ftest_localpart = NULL;
1617uschar *ftest_prefix = NULL;
1618uschar *ftest_suffix = NULL;
0ad2e0fc 1619uschar *log_oneline = NULL;
8544e77a 1620uschar *malware_test_file = NULL;
059ec3d9
PH
1621uschar *real_sender_address;
1622uschar *originator_home = US"/";
a3fb9793 1623size_t sz;
f3ebb786 1624rmark reset_point;
059ec3d9
PH
1625
1626struct passwd *pw;
1627struct stat statbuf;
1628pid_t passed_qr_pid = (pid_t)0;
1629int passed_qr_pipe = -1;
157d73b5 1630gid_t group_list[EXIM_GROUPLIST_SIZE];
059ec3d9 1631
98a90c36
PP
1632/* For the -bI: flag */
1633enum commandline_info info_flag = CMDINFO_NONE;
1634BOOL info_stdout = FALSE;
1635
059ec3d9
PH
1636/* Possible options for -R and -S */
1637
1638static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1639
1640/* Need to define this in case we need to change the environment in order
1641to get rid of a bogus time zone. We have to make it char rather than uschar
1642because some OS define it in /usr/include/unistd.h. */
1643
1644extern char **environ;
1645
9f01e50d
JH
1646#ifdef MEASURE_TIMING
1647(void)gettimeofday(&timestamp_startup, NULL);
1648#endif
1649
35edf2ff 1650/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1651defined by ref:name at build time, we must now find the actual uid/gid values.
1652This is a feature to make the lives of binary distributors easier. */
1653
1654#ifdef EXIM_USERNAME
1655if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1656 {
10385c15 1657 if (exim_uid == 0)
9af3c549
JH
1658 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1659
084c1d8c
PP
1660 /* If ref:name uses a number as the name, route_finduser() returns
1661 TRUE with exim_uid set and pw coerced to NULL. */
1662 if (pw)
1663 exim_gid = pw->pw_gid;
1664#ifndef EXIM_GROUPNAME
1665 else
9af3c549 1666 exim_fail(
084c1d8c
PP
1667 "exim: ref:name should specify a usercode, not a group.\n"
1668 "exim: can't let you get away with it unless you also specify a group.\n");
084c1d8c 1669#endif
059ec3d9
PH
1670 }
1671else
9af3c549 1672 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
059ec3d9
PH
1673#endif
1674
1675#ifdef EXIM_GROUPNAME
1676if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
9af3c549 1677 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
059ec3d9
PH
1678#endif
1679
1680#ifdef CONFIGURE_OWNERNAME
1681if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
9af3c549 1682 exim_fail("exim: failed to find uid for user name \"%s\"\n",
059ec3d9 1683 CONFIGURE_OWNERNAME);
059ec3d9
PH
1684#endif
1685
79d4bc3d
PP
1686/* We default the system_filter_user to be the Exim run-time user, as a
1687sane non-root value. */
1688system_filter_uid = exim_uid;
1689
35edf2ff
PH
1690#ifdef CONFIGURE_GROUPNAME
1691if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
9af3c549 1692 exim_fail("exim: failed to find gid for group name \"%s\"\n",
35edf2ff 1693 CONFIGURE_GROUPNAME);
35edf2ff
PH
1694#endif
1695
92e6a3d9
JH
1696/* In the Cygwin environment, some initialization used to need doing.
1697It was fudged in by means of this macro; now no longer but we'll leave
1698it in case of others. */
059ec3d9
PH
1699
1700#ifdef OS_INIT
1701OS_INIT
1702#endif
1703
1704/* Check a field which is patched when we are running Exim within its
1705testing harness; do a fast initial check, and then the whole thing. */
1706
8768d548 1707f.running_in_test_harness =
059ec3d9 1708 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
8768d548 1709if (f.running_in_test_harness)
65a32f85 1710 debug_store = TRUE;
059ec3d9
PH
1711
1712/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1713at the start of a program; however, it seems that some environments do not
1714follow this. A "strange" locale can affect the formatting of timestamps, so we
1715make quite sure. */
1716
1717setlocale(LC_ALL, "C");
1718
6906c131
JH
1719/* Get the offset between CLOCK_MONOTONIC and wallclock */
1720
1721#ifdef _POSIX_MONOTONIC_CLOCK
1722exim_clock_init();
1723#endif
1724
059ec3d9
PH
1725/* Set up the default handler for timing using alarm(). */
1726
1727os_non_restarting_signal(SIGALRM, sigalrm_handler);
1728
1729/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1730because store_malloc writes a log entry on failure. */
1731
40c90bca 1732if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
9af3c549 1733 exim_fail("exim: failed to get store for log buffer\n");
059ec3d9 1734
6c6d6e48
TF
1735/* Initialize the default log options. */
1736
1737bits_set(log_selector, log_selector_size, log_default);
1738
059ec3d9
PH
1739/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1740NULL when the daemon is run and the file is closed. We have to use this
1741indirection, because some systems don't allow writing to the variable "stderr".
1742*/
1743
1744if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1745
1746/* Arrange for the PCRE regex library to use our store functions. Note that
1747the normal calls are actually macros that add additional arguments for
1748debugging purposes so we have to assign specially constructed functions here.
1749The default is to use store in the stacking pool, but this is overridden in the
1750regex_must_compile() function. */
1751
1752pcre_malloc = function_store_get;
1753pcre_free = function_dummy_free;
1754
1755/* Ensure there is a big buffer for temporary use in several places. It is put
1756in malloc store so that it can be freed for enlargement if necessary. */
1757
1758big_buffer = store_malloc(big_buffer_size);
1759
1760/* Set up the handler for the data request signal, and set the initial
1761descriptive text. */
1762
f3ebb786 1763process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
059ec3d9
PH
1764set_process_info("initializing");
1765os_restarting_signal(SIGUSR1, usr1_handler);
1766
830832c9
HSHR
1767/* If running in a dockerized environment, the TERM signal is only
1768delegated to the PID 1 if we request it by setting an signal handler */
1769if (getpid() == 1) signal(SIGTERM, term_handler);
1770
059ec3d9
PH
1771/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1772in the daemon code. For the rest of Exim's uses, we ignore it. */
1773
1774signal(SIGHUP, SIG_IGN);
1775
1776/* We don't want to die on pipe errors as the code is written to handle
1777the write error instead. */
1778
1779signal(SIGPIPE, SIG_IGN);
1780
1781/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1782set to SIG_IGN. This causes subprocesses that complete before the parent
1783process waits for them not to hang around, so when Exim calls wait(), nothing
1784is there. The wait() code has been made robust against this, but let's ensure
1785that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1786ending status. We use sigaction rather than plain signal() on those OS where
1787SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1788problem on AIX with this.) */
1789
1790#ifdef SA_NOCLDWAIT
1791 {
1792 struct sigaction act;
1793 act.sa_handler = SIG_DFL;
1794 sigemptyset(&(act.sa_mask));
1795 act.sa_flags = 0;
1796 sigaction(SIGCHLD, &act, NULL);
1797 }
1798#else
1799signal(SIGCHLD, SIG_DFL);
1800#endif
1801
1802/* Save the arguments for use if we re-exec exim as a daemon after receiving
1803SIGHUP. */
1804
1805sighup_argv = argv;
1806
1807/* Set up the version number. Set up the leading 'E' for the external form of
1808message ids, set the pointer to the internal form, and initialize it to
1809indicate no message being processed. */
1810
1811version_init();
1812message_id_option[0] = '-';
1813message_id_external = message_id_option + 1;
1814message_id_external[0] = 'E';
1815message_id = message_id_external + 1;
1816message_id[0] = 0;
1817
67d175de 1818/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1819created with the modes that it specifies. NOTE: Files created with fopen() have
1820a problem, which was not recognized till rather late (February 2006). With this
1821umask, such files will be world writeable. (They are all content scanning files
1822in the spool directory, which isn't world-accessible, so this is not a
1823disaster, but it's untidy.) I don't want to change this overall setting,
1824however, because it will interact badly with the open() calls. Instead, there's
1825now a function called modefopen() that fiddles with the umask while calling
1826fopen(). */
059ec3d9 1827
67d175de 1828(void)umask(0);
059ec3d9
PH
1829
1830/* Precompile the regular expression for matching a message id. Keep this in
1831step with the code that generates ids in the accept.c module. We need to do
1832this here, because the -M options check their arguments for syntactic validity
1833using mac_ismsgid, which uses this. */
1834
1835regex_ismsgid =
1836 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1837
a5bd321b 1838/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1839code, possibly extended, at the start of an error message. Note that the
1840terminating whitespace character is included. */
a5bd321b
PH
1841
1842regex_smtp_code =
1843 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1844 FALSE, TRUE);
1845
a7cbbf50
PP
1846#ifdef WHITELIST_D_MACROS
1847/* Precompile the regular expression used to filter the content of macros
1848given to -D for permissibility. */
1849
1850regex_whitelisted_macro =
1851 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1852#endif
1853
f38917cc
JH
1854for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1855
059ec3d9
PH
1856/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1857this seems to be a generally accepted convention, since one finds symbolic
1858links called "mailq" in standard OS configurations. */
1859
1860if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1861 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1862 {
1863 list_queue = TRUE;
1864 receiving_message = FALSE;
1865 called_as = US"-mailq";
1866 }
1867
1868/* If the program is called as "rmail" treat it as equivalent to
1869"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1870i.e. preventing a single dot on a line from terminating the message, and
1871returning with zero return code, even in cases of error (provided an error
1872message has been sent). */
1873
1874if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1875 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1876 {
8768d548 1877 f.dot_ends = FALSE;
059ec3d9
PH
1878 called_as = US"-rmail";
1879 errors_sender_rc = EXIT_SUCCESS;
1880 }
1881
1882/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1883this is a smail convention. */
1884
1885if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1886 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1887 {
1888 smtp_input = smtp_batched_input = TRUE;
1889 called_as = US"-rsmtp";
1890 }
1891
1892/* If the program is called as "runq" treat it as equivalent to "exim -q";
1893this is a smail convention. */
1894
1895if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1896 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1897 {
1898 queue_interval = 0;
1899 receiving_message = FALSE;
1900 called_as = US"-runq";
1901 }
1902
1903/* If the program is called as "newaliases" treat it as equivalent to
1904"exim -bi"; this is a sendmail convention. */
1905
1906if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1907 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1908 {
1909 bi_option = TRUE;
1910 receiving_message = FALSE;
1911 called_as = US"-newaliases";
1912 }
1913
1914/* Save the original effective uid for a couple of uses later. It should
1915normally be root, but in some esoteric environments it may not be. */
1916
1917original_euid = geteuid();
3b7ac02c 1918original_egid = getegid();
059ec3d9
PH
1919
1920/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1921to be the same as the real ones. This makes a difference only if Exim is setuid
1922(or setgid) to something other than root, which could be the case in some
1923special configurations. */
1924
1925real_uid = getuid();
1926real_gid = getgid();
1927
1928if (real_uid == root_uid)
1929 {
9af3c549
JH
1930 if ((rv = setgid(real_gid)))
1931 exim_fail("exim: setgid(%ld) failed: %s\n",
1670ef10 1932 (long int)real_gid, strerror(errno));
9af3c549
JH
1933 if ((rv = setuid(real_uid)))
1934 exim_fail("exim: setuid(%ld) failed: %s\n",
1670ef10 1935 (long int)real_uid, strerror(errno));
059ec3d9
PH
1936 }
1937
1938/* If neither the original real uid nor the original euid was root, Exim is
1939running in an unprivileged state. */
1940
1941unprivileged = (real_uid != root_uid && original_euid != root_uid);
1942
059ec3d9
PH
1943/* Scan the program's arguments. Some can be dealt with right away; others are
1944simply recorded for checking and handling afterwards. Do a high-level switch
1945on the second character (the one after '-'), to save some effort. */
1946
1947for (i = 1; i < argc; i++)
1948 {
1949 BOOL badarg = FALSE;
1950 uschar *arg = argv[i];
1951 uschar *argrest;
1952 int switchchar;
1953
1954 /* An argument not starting with '-' is the start of a recipients list;
1955 break out of the options-scanning loop. */
1956
1957 if (arg[0] != '-')
1958 {
1959 recipients_arg = i;
1960 break;
1961 }
1962
4c04137d 1963 /* An option consisting of -- terminates the options */
059ec3d9
PH
1964
1965 if (Ustrcmp(arg, "--") == 0)
1966 {
1967 recipients_arg = i + 1;
1968 break;
1969 }
1970
1971 /* Handle flagged options */
1972
1973 switchchar = arg[1];
1974 argrest = arg+2;
1975
1976 /* Make all -ex options synonymous with -oex arguments, since that
1977 is assumed by various callers. Also make -qR options synonymous with -R
1978 options, as that seems to be required as well. Allow for -qqR too, and
1979 the same for -S options. */
1980
1981 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1982 Ustrncmp(arg+1, "qR", 2) == 0 ||
1983 Ustrncmp(arg+1, "qS", 2) == 0)
1984 {
1985 switchchar = arg[2];
1986 argrest++;
1987 }
1988 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1989 {
1990 switchchar = arg[3];
1991 argrest += 2;
8768d548 1992 f.queue_2stage = TRUE;
059ec3d9
PH
1993 }
1994
1995 /* Make -r synonymous with -f, since it is a documented alias */
1996
1997 else if (arg[1] == 'r') switchchar = 'f';
1998
1999 /* Make -ov synonymous with -v */
2000
2001 else if (Ustrcmp(arg, "-ov") == 0)
2002 {
2003 switchchar = 'v';
2004 argrest++;
2005 }
2006
4b2241d2
PP
2007 /* deal with --option_aliases */
2008 else if (switchchar == '-')
2009 {
2010 if (Ustrcmp(argrest, "help") == 0)
2011 {
2012 usage_wanted = TRUE;
2013 break;
2014 }
2015 else if (Ustrcmp(argrest, "version") == 0)
2016 {
2017 switchchar = 'b';
73a46702 2018 argrest = US"V";
4b2241d2
PP
2019 }
2020 }
2021
059ec3d9
PH
2022 /* High-level switch on active initial letter */
2023
2024 switch(switchchar)
2025 {
a3fb9793
PP
2026
2027 /* sendmail uses -Ac and -Am to control which .cf file is used;
2028 we ignore them. */
2029 case 'A':
2030 if (*argrest == '\0') { badarg = TRUE; break; }
2031 else
2032 {
2033 BOOL ignore = FALSE;
2034 switch (*argrest)
2035 {
2036 case 'c':
2037 case 'm':
2038 if (*(argrest + 1) == '\0')
2039 ignore = TRUE;
2040 break;
2041 }
bdcc6f2b 2042 if (!ignore) badarg = TRUE;
a3fb9793
PP
2043 }
2044 break;
2045
059ec3d9
PH
2046 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2047 so has no need of it. */
2048
2049 case 'B':
bdcc6f2b 2050 if (!*argrest) i++; /* Skip over the type */
059ec3d9
PH
2051 break;
2052
2053
2054 case 'b':
059ec3d9 2055 {
bdcc6f2b
JH
2056 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2057
2058 switch (*argrest++)
2059 {
2060 /* -bd: Run in daemon mode, awaiting SMTP connections.
2061 -bdf: Ditto, but in the foreground.
2062 */
2063 case 'd':
2064 f.daemon_listen = TRUE;
2065 if (*argrest == 'f') f.background_daemon = FALSE;
2066 else if (*argrest) badarg = TRUE;
2067 break;
2068
2069 /* -be: Run in expansion test mode
2070 -bem: Ditto, but read a message from a file first
2071 */
2072 case 'e':
2073 expansion_test = checking = TRUE;
2074 if (*argrest == 'm')
2075 {
2076 if (++i >= argc) { badarg = TRUE; break; }
2077 expansion_test_message = argv[i];
2078 argrest++;
2079 }
2080 if (*argrest) badarg = TRUE;
2081 break;
2082
2083 /* -bF: Run system filter test */
2084 case 'F':
2085 filter_test |= checking = FTEST_SYSTEM;
2086 if (*argrest) { badarg = TRUE; break; }
2087 if (++i < argc) filter_test_sfile = argv[i]; else
2088 exim_fail("exim: file name expected after %s\n", argv[i-1]);
2089 break;
2090
2091 /* -bf: Run user filter test
2092 -bfd: Set domain for filter testing
2093 -bfl: Set local part for filter testing
2094 -bfp: Set prefix for filter testing
2095 -bfs: Set suffix for filter testing
2096 */
2097 case 'f':
2098 if (!*argrest)
2099 {
2100 filter_test |= checking = FTEST_USER;
2101 if (++i < argc) filter_test_ufile = argv[i];
2102 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2103 }
2104 else
2105 {
2106 if (++i >= argc)
2107 exim_fail("exim: string expected after %s\n", arg);
2108 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2109 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2110 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2111 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2112 else badarg = TRUE;
2113 }
2114 break;
2115
2116 /* -bh: Host checking - an IP address must follow. */
2117 case 'h':
2118 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2119 {
2120 if (++i >= argc) { badarg = TRUE; break; }
2121 sender_host_address = argv[i];
2122 host_checking = checking = f.log_testing_mode = TRUE;
2123 f.host_checking_callout = *argrest == 'c';
2124 message_logs = FALSE;
2125 }
2126 else badarg = TRUE;
2127 break;
2128
2129 /* -bi: This option is used by sendmail to initialize *the* alias file,
2130 though it has the -oA option to specify a different file. Exim has no
2131 concept of *the* alias file, but since Sun's YP make script calls
2132 sendmail this way, some support must be provided. */
2133 case 'i':
2134 if (!*++argrest) bi_option = TRUE;
2135 else badarg = TRUE;
2136 break;
2137
2138 /* -bI: provide information, of the type to follow after a colon.
2139 This is an Exim flag. */
2140 case 'I':
2141 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2142 {
2143 uschar *p = argrest+1;
2144 info_flag = CMDINFO_HELP;
2145 if (Ustrlen(p))
2146 if (strcmpic(p, CUS"sieve") == 0)
2147 {
2148 info_flag = CMDINFO_SIEVE;
2149 info_stdout = TRUE;
2150 }
2151 else if (strcmpic(p, CUS"dscp") == 0)
2152 {
2153 info_flag = CMDINFO_DSCP;
2154 info_stdout = TRUE;
2155 }
2156 else if (strcmpic(p, CUS"help") == 0)
2157 info_stdout = TRUE;
2158 }
2159 else badarg = TRUE;
2160 break;
2161
2162 /* -bm: Accept and deliver message - the default option. Reinstate
2163 receiving_message, which got turned off for all -b options.
2164 -bmalware: test the filename given for malware */
2165 case 'm':
2166 if (!*argrest) receiving_message = TRUE;
2167 else if (Ustrcmp(argrest, "alware") == 0)
2168 {
2169 if (++i >= argc) { badarg = TRUE; break; }
2170 checking = TRUE;
2171 malware_test_file = argv[i];
2172 }
2173 else badarg = TRUE;
2174 break;
2175
2176 /* -bnq: For locally originating messages, do not qualify unqualified
2177 addresses. In the envelope, this causes errors; in header lines they
2178 just get left. */
2179 case 'n':
2180 if (Ustrcmp(argrest, "q") == 0)
2181 {
2182 f.allow_unqualified_sender = FALSE;
2183 f.allow_unqualified_recipient = FALSE;
2184 }
2185 else badarg = TRUE;
2186 break;
2187
2188 /* -bpxx: List the contents of the mail queue, in various forms. If
2189 the option is -bpc, just a queue count is needed. Otherwise, if the
2190 first letter after p is r, then order is random. */
2191 case 'p':
2192 if (*argrest == 'c')
2193 {
2194 count_queue = TRUE;
2195 if (*++argrest) badarg = TRUE;
2196 break;
2197 }
2198
2199 if (*argrest == 'r')
2200 {
2201 list_queue_option = 8;
2202 argrest++;
2203 }
2204 else list_queue_option = 0;
2205
2206 list_queue = TRUE;
2207
2208 /* -bp: List the contents of the mail queue, top-level only */
2209
2210 if (!*argrest) {}
2211
2212 /* -bpu: List the contents of the mail queue, top-level undelivered */
2213
2214 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2215
2216 /* -bpa: List the contents of the mail queue, including all delivered */
2217
2218 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2219
2220 /* Unknown after -bp[r] */
2221
2222 else badarg = TRUE;
2223 break;
2224
2225
2226 /* -bP: List the configuration variables given as the address list.
2227 Force -v, so configuration errors get displayed. */
2228 case 'P':
2229
2230 /* -bP config: we need to setup here, because later,
2231 * when list_options is checked, the config is read already */
2232 if (*argrest)
2233 badarg = TRUE;
2234 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2235 {
2236 list_config = TRUE;
2237 readconf_save_config(version_string);
2238 }
2239 else
2240 {
2241 list_options = TRUE;
2242 debug_selector |= D_v;
2243 debug_file = stderr;
2244 }
2245 break;
2246
2247 /* -brt: Test retry configuration lookup */
2248 case 'r':
2249 if (Ustrcmp(argrest, "t") == 0)
2250 {
2251 checking = TRUE;
2252 test_retry_arg = i + 1;
2253 goto END_ARG;
2254 }
2255
2256 /* -brw: Test rewrite configuration */
2257
2258 else if (Ustrcmp(argrest, "w") == 0)
2259 {
2260 checking = TRUE;
2261 test_rewrite_arg = i + 1;
2262 goto END_ARG;
2263 }
2264 else badarg = TRUE;
2265 break;
2266
2267 /* -bS: Read SMTP commands on standard input, but produce no replies -
2268 all errors are reported by sending messages. */
2269 case 'S':
2270 if (!*argrest)
2271 smtp_input = smtp_batched_input = receiving_message = TRUE;
2272 else badarg = TRUE;
2273 break;
2274
2275 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2276 on standard output. */
2277 case 's':
2278 if (!*argrest) smtp_input = receiving_message = TRUE;
2279 else badarg = TRUE;
2280 break;
2281
2282 /* -bt: address testing mode */
2283 case 't':
2284 if (!*argrest)
2285 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2286 else badarg = TRUE;
2287 break;
2288
2289 /* -bv: verify addresses */
2290 case 'v':
2291 if (!*argrest)
2292 verify_address_mode = checking = f.log_testing_mode = TRUE;
2293
2294 /* -bvs: verify sender addresses */
2295
2296 else if (Ustrcmp(argrest, "s") == 0)
2297 {
2298 verify_address_mode = checking = f.log_testing_mode = TRUE;
2299 verify_as_sender = TRUE;
2300 }
2301 else badarg = TRUE;
2302 break;
2303
2304 /* -bV: Print version string and support details */
2305 case 'V':
2306 if (!*argrest)
2307 {
2308 printf("Exim version %s #%s built %s\n", version_string,
2309 version_cnumber, version_date);
2310 printf("%s\n", CS version_copyright);
2311 version_printed = TRUE;
2312 show_whats_supported(stdout);
2313 f.log_testing_mode = TRUE;
2314 }
2315 else badarg = TRUE;
2316 break;
2317
2318 /* -bw: inetd wait mode, accept a listening socket as stdin */
2319 case 'w':
2320 f.inetd_wait_mode = TRUE;
2321 f.background_daemon = FALSE;
2322 f.daemon_listen = TRUE;
2323 if (*argrest)
2324 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2325 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2326 break;
2327
2328 default:
2329 badarg = TRUE;
2330 break;
2331 }
2332 break;
9ee44efb
PP
2333 }
2334
059ec3d9
PH
2335
2336 /* -C: change configuration file list; ignore if it isn't really
2337 a change! Enforce a prefix check if required. */
2338
2339 case 'C':
2340 if (*argrest == 0)
2341 {
2342 if(++i < argc) argrest = argv[i]; else
2343 { badarg = TRUE; break; }
2344 }
2345 if (Ustrcmp(config_main_filelist, argrest) != 0)
2346 {
2347 #ifdef ALT_CONFIG_PREFIX
2348 int sep = 0;
2349 int len = Ustrlen(ALT_CONFIG_PREFIX);
863bd541 2350 const uschar *list = argrest;
059ec3d9
PH
2351 uschar *filename;
2352 while((filename = string_nextinlist(&list, &sep, big_buffer,
2353 big_buffer_size)) != NULL)
2354 {
2355 if ((Ustrlen(filename) < len ||
2356 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2357 Ustrstr(filename, "/../") != NULL) &&
2358 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
9af3c549 2359 exim_fail("-C Permission denied\n");
059ec3d9
PH
2360 }
2361 #endif
261dc43e
DW
2362 if (real_uid != root_uid)
2363 {
90b6341f 2364 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2365
90b6341f
DW
2366 if (real_uid != exim_uid
2367 #ifdef CONFIGURE_OWNER
2368 && real_uid != config_uid
2369 #endif
2370 )
8768d548 2371 f.trusted_config = FALSE;
261dc43e
DW
2372 else
2373 {
90b6341f 2374 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2375 if (trust_list)
2376 {
2377 struct stat statbuf;
2378
2379 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2380 (statbuf.st_uid != root_uid /* owner not root */
2381 #ifdef CONFIGURE_OWNER
2382 && statbuf.st_uid != config_uid /* owner not the special one */
2383 #endif
2384 ) || /* or */
2385 (statbuf.st_gid != root_gid /* group not root */
2386 #ifdef CONFIGURE_GROUP
2387 && statbuf.st_gid != config_gid /* group not the special one */
2388 #endif
2389 && (statbuf.st_mode & 020) != 0 /* group writeable */
2390 ) || /* or */
2391 (statbuf.st_mode & 2) != 0) /* world writeable */
2392 {
8768d548 2393 f.trusted_config = FALSE;
261dc43e
DW
2394 fclose(trust_list);
2395 }
2396 else
2397 {
2398 /* Well, the trust list at least is up to scratch... */
f3ebb786 2399 rmark reset_point = store_mark();
90b6341f
DW
2400 uschar *trusted_configs[32];
2401 int nr_configs = 0;
261dc43e
DW
2402 int i = 0;
2403
2404 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2405 {
2406 uschar *start = big_buffer, *nl;
2407 while (*start && isspace(*start))
2408 start++;
1e83d68b 2409 if (*start != '/')
261dc43e
DW
2410 continue;
2411 nl = Ustrchr(start, '\n');
2412 if (nl)
2413 *nl = 0;
90b6341f
DW
2414 trusted_configs[nr_configs++] = string_copy(start);
2415 if (nr_configs == 32)
261dc43e
DW
2416 break;
2417 }
2418 fclose(trust_list);
2419
90b6341f 2420 if (nr_configs)
261dc43e
DW
2421 {
2422 int sep = 0;
55414b25 2423 const uschar *list = argrest;
261dc43e 2424 uschar *filename;
8768d548 2425 while (f.trusted_config && (filename = string_nextinlist(&list,
261dc43e
DW
2426 &sep, big_buffer, big_buffer_size)) != NULL)
2427 {
90b6341f 2428 for (i=0; i < nr_configs; i++)
90b6341f 2429 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e 2430 break;
90b6341f 2431 if (i == nr_configs)
261dc43e 2432 {
8768d548 2433 f.trusted_config = FALSE;
261dc43e
DW
2434 break;
2435 }
2436 }
2437 }
f3ebb786 2438 else /* No valid prefixes found in trust_list file. */
8768d548 2439 f.trusted_config = FALSE;
f3ebb786 2440 store_reset(reset_point);
261dc43e
DW
2441 }
2442 }
f3ebb786 2443 else /* Could not open trust_list file. */
8768d548 2444 f.trusted_config = FALSE;
261dc43e
DW
2445 }
2446 #else
2447 /* Not root; don't trust config */
8768d548 2448 f.trusted_config = FALSE;
261dc43e
DW
2449 #endif
2450 }
059ec3d9
PH
2451
2452 config_main_filelist = argrest;
8768d548 2453 f.config_changed = TRUE;
059ec3d9
PH
2454 }
2455 break;
2456
2457
2458 /* -D: set up a macro definition */
2459
2460 case 'D':
9af3c549
JH
2461#ifdef DISABLE_D_OPTION
2462 exim_fail("exim: -D is not available in this Exim binary\n");
2463#else
059ec3d9
PH
2464 {
2465 int ptr = 0;
059ec3d9
PH
2466 macro_item *m;
2467 uschar name[24];
2468 uschar *s = argrest;
2469
4ab69ec7 2470 opt_D_used = TRUE;
059ec3d9
PH
2471 while (isspace(*s)) s++;
2472
2473 if (*s < 'A' || *s > 'Z')
9af3c549 2474 exim_fail("exim: macro name set by -D must start with "
059ec3d9 2475 "an upper case letter\n");
059ec3d9
PH
2476
2477 while (isalnum(*s) || *s == '_')
2478 {
2479 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2480 s++;
2481 }
2482 name[ptr] = 0;
2483 if (ptr == 0) { badarg = TRUE; break; }
2484 while (isspace(*s)) s++;
2485 if (*s != 0)
2486 {
2487 if (*s++ != '=') { badarg = TRUE; break; }
2488 while (isspace(*s)) s++;
2489 }
2490
85e03244 2491 for (m = macros_user; m; m = m->next)
1a7c9a48 2492 if (Ustrcmp(m->name, name) == 0)
9af3c549 2493 exim_fail("exim: duplicated -D in command line\n");
059ec3d9 2494
85e03244 2495 m = macro_create(name, s, TRUE);
059ec3d9
PH
2496
2497 if (clmacro_count >= MAX_CLMACROS)
9af3c549 2498 exim_fail("exim: too many -D options on command line\n");
f3ebb786
JH
2499 clmacros[clmacro_count++] =
2500 string_sprintf("-D%s=%s", m->name, m->replacement);
059ec3d9
PH
2501 }
2502 #endif
2503 break;
2504
2505 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2506 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2507 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2508
2509 case 'd':
2510 if (Ustrcmp(argrest, "ropcr") == 0)
2511 {
2512 /* drop_cr = TRUE; */
2513 }
2514
2515 /* Use an intermediate variable so that we don't set debugging while
2516 decoding the debugging bits. */
2517
2518 else
2519 {
2520 unsigned int selector = D_default;
2521 debug_selector = 0;
2522 debug_file = NULL;
3d235903
PH
2523 if (*argrest == 'd')
2524 {
8768d548 2525 f.debug_daemon = TRUE;
3d235903
PH
2526 argrest++;
2527 }
059ec3d9 2528 if (*argrest != 0)
6c6d6e48
TF
2529 decode_bits(&selector, 1, debug_notall, argrest,
2530 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2531 debug_selector = selector;
2532 }
2533 break;
2534
2535
2536 /* -E: This is a local error message. This option is not intended for
2537 external use at all, but is not restricted to trusted callers because it
2538 does no harm (just suppresses certain error messages) and if Exim is run
2539 not setuid root it won't always be trusted when it generates error
2540 messages using this option. If there is a message id following -E, point
2541 message_reference at it, for logging. */
2542
2543 case 'E':
8768d548 2544 f.local_error_message = TRUE;
059ec3d9
PH
2545 if (mac_ismsgid(argrest)) message_reference = argrest;
2546 break;
2547
2548
2549 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2550 option, so it looks as if historically the -oex options are also callable
2551 without the leading -o. So we have to accept them. Before the switch,
2552 anything starting -oe has been converted to -e. Exim does not support all
2553 of the sendmail error options. */
2554
2555 case 'e':
2556 if (Ustrcmp(argrest, "e") == 0)
2557 {
2558 arg_error_handling = ERRORS_SENDER;
2559 errors_sender_rc = EXIT_SUCCESS;
2560 }
2561 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2562 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2563 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2564 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2565 else badarg = TRUE;
2566 break;
2567
2568
2569 /* -F: Set sender's full name, used instead of the gecos entry from
2570 the password file. Since users can usually alter their gecos entries,
2571 there's no security involved in using this instead. The data can follow
2572 the -F or be in the next argument. */
2573
2574 case 'F':
2575 if (*argrest == 0)
2576 {
2577 if(++i < argc) argrest = argv[i]; else
2578 { badarg = TRUE; break; }
2579 }
2580 originator_name = argrest;
8768d548 2581 f.sender_name_forced = TRUE;
059ec3d9
PH
2582 break;
2583
2584
2585 /* -f: Set sender's address - this value is only actually used if Exim is
2586 run by a trusted user, or if untrusted_set_sender is set and matches the
2587 address, except that the null address can always be set by any user. The
2588 test for this happens later, when the value given here is ignored when not
2589 permitted. For an untrusted user, the actual sender is still put in Sender:
2590 if it doesn't match the From: header (unless no_local_from_check is set).
2591 The data can follow the -f or be in the next argument. The -r switch is an
2592 obsolete form of -f but since there appear to be programs out there that
2593 use anything that sendmail has ever supported, better accept it - the
2594 synonymizing is done before the switch above.
2595
2596 At this stage, we must allow domain literal addresses, because we don't
2597 know what the setting of allow_domain_literals is yet. Ditto for trailing
2598 dots and strip_trailing_dot. */
2599
2600 case 'f':
2601 {
250b6871 2602 int dummy_start, dummy_end;
059ec3d9
PH
2603 uschar *errmess;
2604 if (*argrest == 0)
2605 {
2606 if (i+1 < argc) argrest = argv[++i]; else
2607 { badarg = TRUE; break; }
2608 }
2609 if (*argrest == 0)
f3ebb786 2610 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
059ec3d9
PH
2611 else
2612 {
2613 uschar *temp = argrest + Ustrlen(argrest) - 1;
2614 while (temp >= argrest && isspace(*temp)) temp--;
2615 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2616 allow_domain_literals = TRUE;
2617 strip_trailing_dot = TRUE;
8c5d388a 2618#ifdef SUPPORT_I18N
250b6871
JH
2619 allow_utf8_domains = TRUE;
2620#endif
2621 sender_address = parse_extract_address(argrest, &errmess,
2622 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
f3ebb786 2623 sender_address = string_copy_taint(sender_address, TRUE);
8c5d388a 2624#ifdef SUPPORT_I18N
250b6871
JH
2625 message_smtputf8 = string_is_utf8(sender_address);
2626 allow_utf8_domains = FALSE;
2627#endif
059ec3d9
PH
2628 allow_domain_literals = FALSE;
2629 strip_trailing_dot = FALSE;
9af3c549
JH
2630 if (!sender_address)
2631 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
059ec3d9 2632 }
8768d548 2633 f.sender_address_forced = TRUE;
059ec3d9
PH
2634 }
2635 break;
2636
a3fb9793 2637 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2638 sendmail may complain about problems instead of fixing them.
2639 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2640 not at this time complain about problems. */
059ec3d9
PH
2641
2642 case 'G':
f4ee74ac 2643 flag_G = TRUE;
059ec3d9
PH
2644 break;
2645
2646 /* -h: Set the hop count for an incoming message. Exim does not currently
2647 support this; it always computes it by counting the Received: headers.
2648 To put it in will require a change to the spool header file format. */
2649
2650 case 'h':
2651 if (*argrest == 0)
2652 {
2653 if(++i < argc) argrest = argv[i]; else
2654 { badarg = TRUE; break; }
2655 }
2656 if (!isdigit(*argrest)) badarg = TRUE;
2657 break;
2658
2659
2660 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2661 not to be documented for sendmail but mailx (at least) uses it) */
2662
2663 case 'i':
8768d548 2664 if (*argrest == 0) f.dot_ends = FALSE; else badarg = TRUE;
059ec3d9
PH
2665 break;
2666
2667
a3fb9793
PP
2668 /* -L: set the identifier used for syslog; equivalent to setting
2669 syslog_processname in the config file, but needs to be an admin option. */
2670
2671 case 'L':
2672 if (*argrest == '\0')
2673 {
2674 if(++i < argc) argrest = argv[i]; else
2675 { badarg = TRUE; break; }
2676 }
9af3c549
JH
2677 if ((sz = Ustrlen(argrest)) > 32)
2678 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
a3fb9793 2679 if (sz < 1)
9af3c549 2680 exim_fail("exim: the -L syslog name is too short\n");
a3fb9793
PP
2681 cmdline_syslog_name = argrest;
2682 break;
2683
059ec3d9
PH
2684 case 'M':
2685 receiving_message = FALSE;
2686
2687 /* -MC: continue delivery of another message via an existing open
2688 file descriptor. This option is used for an internal call by the
2689 smtp transport when there is a pending message waiting to go to an
2690 address to which it has got a connection. Five subsequent arguments are
2691 required: transport name, host name, IP address, sequence number, and
2692 message_id. Transports may decline to create new processes if the sequence
2693 number gets too big. The channel is stdin. This (-MC) must be the last
2694 argument. There's a subsequent check that the real-uid is privileged.
2695
2696 If we are running in the test harness. delay for a bit, to let the process
2697 that set this one up complete. This makes for repeatability of the logging,
2698 etc. output. */
2699
2700 if (Ustrcmp(argrest, "C") == 0)
2701 {
41c7c167
PH
2702 union sockaddr_46 interface_sock;
2703 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2704
059ec3d9 2705 if (argc != i + 6)
9af3c549 2706 exim_fail("exim: too many or too few arguments after -MC\n");
059ec3d9
PH
2707
2708 if (msg_action_arg >= 0)
9af3c549 2709 exim_fail("exim: incompatible arguments\n");
059ec3d9
PH
2710
2711 continue_transport = argv[++i];
2712 continue_hostname = argv[++i];
2713 continue_host_address = argv[++i];
2714 continue_sequence = Uatoi(argv[++i]);
2715 msg_action = MSG_DELIVER;
2716 msg_action_arg = ++i;
2717 forced_delivery = TRUE;
2718 queue_run_pid = passed_qr_pid;
2719 queue_run_pipe = passed_qr_pipe;
2720
2721 if (!mac_ismsgid(argv[i]))
9af3c549 2722 exim_fail("exim: malformed message id %s after -MC option\n",
059ec3d9 2723 argv[i]);
059ec3d9 2724
875512a3
JH
2725 /* Set up $sending_ip_address and $sending_port, unless proxied */
2726
5013d912 2727 if (!continue_proxy_cipher)
875512a3
JH
2728 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2729 &size) == 0)
2730 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2731 &sending_port);
2732 else
9af3c549 2733 exim_fail("exim: getsockname() failed after -MC option: %s\n",
875512a3 2734 strerror(errno));
41c7c167 2735
9f01e50d 2736 testharness_pause_ms(500);
059ec3d9
PH
2737 break;
2738 }
2739
2d14f397
JH
2740 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2741 {
875512a3 2742 switch(argrest[1])
2d14f397 2743 {
059ec3d9
PH
2744 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2745 precedes -MC (see above). The flag indicates that the host to which
2746 Exim is connected has accepted an AUTH sequence. */
2747
8768d548 2748 case 'A': f.smtp_authenticated = TRUE; break;
059ec3d9 2749
6c1c3d1d
WB
2750 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2751 that exim is connected to supports the esmtp extension DSN */
28b3821f 2752
14de8063 2753 case 'D': smtp_peer_options |= OPTION_DSN; break;
6c1c3d1d 2754
e37f8a84 2755 /* -MCG: set the queue name, to a non-default value */
28b3821f 2756
2d14f397
JH
2757 case 'G': if (++i < argc) queue_name = string_copy(argv[i]);
2758 else badarg = TRUE;
2759 break;
2760
2761 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2762
14de8063 2763 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
28b3821f 2764
059ec3d9
PH
2765 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2766 it preceded -MC (see above) */
2767
14de8063 2768 case 'P': smtp_peer_options |= OPTION_PIPE; break;
059ec3d9
PH
2769
2770 /* -MCQ: pass on the pid of the queue-running process that started
2771 this chain of deliveries and the fd of its synchronizing pipe; this
2772 is useful only when it precedes -MC (see above) */
2773
2d14f397
JH
2774 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2775 else badarg = TRUE;
2776 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2777 else badarg = TRUE;
2778 break;
059ec3d9
PH
2779
2780 /* -MCS: set the smtp_use_size flag; this is useful only when it
2781 precedes -MC (see above) */
2782
14de8063 2783 case 'S': smtp_peer_options |= OPTION_SIZE; break;
059ec3d9 2784
01603eec 2785#ifndef DISABLE_TLS
875512a3 2786 /* -MCt: similar to -MCT below but the connection is still open
aded2255 2787 via a proxy process which handles the TLS context and coding.
5013d912
JH
2788 Require three arguments for the proxied local address and port,
2789 and the TLS cipher. */
875512a3 2790
5013d912 2791 case 't': if (++i < argc) sending_ip_address = argv[i];
875512a3
JH
2792 else badarg = TRUE;
2793 if (++i < argc) sending_port = (int)(Uatol(argv[i]));
2794 else badarg = TRUE;
5013d912
JH
2795 if (++i < argc) continue_proxy_cipher = argv[i];
2796 else badarg = TRUE;
875512a3
JH
2797 /*FALLTHROUGH*/
2798
059ec3d9
PH
2799 /* -MCT: set the tls_offered flag; this is useful only when it
2800 precedes -MC (see above). The flag indicates that the host to which
2801 Exim is connected has offered TLS support. */
2802
14de8063 2803 case 'T': smtp_peer_options |= OPTION_TLS; break;
2d14f397
JH
2804#endif
2805
2806 default: badarg = TRUE; break;
2807 }
8ac90765
JH
2808 break;
2809 }
2810
059ec3d9
PH
2811 /* -M[x]: various operations on the following list of message ids:
2812 -M deliver the messages, ignoring next retry times and thawing
2813 -Mc deliver the messages, checking next retry times, no thawing
2814 -Mf freeze the messages
2815 -Mg give up on the messages
2816 -Mt thaw the messages
2817 -Mrm remove the messages
2818 In the above cases, this must be the last option. There are also the
2819 following options which are followed by a single message id, and which
2820 act on that message. Some of them use the "recipient" addresses as well.
2821 -Mar add recipient(s)
2822 -Mmad mark all recipients delivered
2823 -Mmd mark recipients(s) delivered
2824 -Mes edit sender
0ef732d9 2825 -Mset load a message for use with -be
059ec3d9 2826 -Mvb show body
a96603a0 2827 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2828 -Mvh show header
2829 -Mvl show log
2830 */
2831
2832 else if (*argrest == 0)
2833 {
2834 msg_action = MSG_DELIVER;
8768d548 2835 forced_delivery = f.deliver_force_thaw = TRUE;
059ec3d9
PH
2836 }
2837 else if (Ustrcmp(argrest, "ar") == 0)
2838 {
2839 msg_action = MSG_ADD_RECIPIENT;
2840 one_msg_action = TRUE;
2841 }
2842 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2843 else if (Ustrcmp(argrest, "es") == 0)
2844 {
2845 msg_action = MSG_EDIT_SENDER;
2846 one_msg_action = TRUE;
2847 }
2848 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2849 else if (Ustrcmp(argrest, "g") == 0)
2850 {
2851 msg_action = MSG_DELIVER;
2852 deliver_give_up = TRUE;
2853 }
fc7bae7f
JH
2854 else if (Ustrcmp(argrest, "G") == 0)
2855 {
2856 msg_action = MSG_SETQUEUE;
2857 queue_name_dest = argv[++i];
2858 }
059ec3d9
PH
2859 else if (Ustrcmp(argrest, "mad") == 0)
2860 {
2861 msg_action = MSG_MARK_ALL_DELIVERED;
2862 }
2863 else if (Ustrcmp(argrest, "md") == 0)
2864 {
2865 msg_action = MSG_MARK_DELIVERED;
2866 one_msg_action = TRUE;
2867 }
2868 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2869 else if (Ustrcmp(argrest, "set") == 0)
2870 {
2871 msg_action = MSG_LOAD;
2872 one_msg_action = TRUE;
2873 }
059ec3d9
PH
2874 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2875 else if (Ustrcmp(argrest, "vb") == 0)
2876 {
2877 msg_action = MSG_SHOW_BODY;
2878 one_msg_action = TRUE;
2879 }
a96603a0
PH
2880 else if (Ustrcmp(argrest, "vc") == 0)
2881 {
2882 msg_action = MSG_SHOW_COPY;
2883 one_msg_action = TRUE;
2884 }
059ec3d9
PH
2885 else if (Ustrcmp(argrest, "vh") == 0)
2886 {
2887 msg_action = MSG_SHOW_HEADER;
2888 one_msg_action = TRUE;
2889 }
2890 else if (Ustrcmp(argrest, "vl") == 0)
2891 {
2892 msg_action = MSG_SHOW_LOG;
2893 one_msg_action = TRUE;
2894 }
2895 else { badarg = TRUE; break; }
2896
2897 /* All the -Mxx options require at least one message id. */
2898
2899 msg_action_arg = i + 1;
2900 if (msg_action_arg >= argc)
9af3c549 2901 exim_fail("exim: no message ids given after %s option\n", arg);
059ec3d9
PH
2902
2903 /* Some require only message ids to follow */
2904
2905 if (!one_msg_action)
2906 {
d7978c0f 2907 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
9af3c549 2908 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2909 argv[j], arg);
059ec3d9
PH
2910 goto END_ARG; /* Remaining args are ids */
2911 }
2912
2913 /* Others require only one message id, possibly followed by addresses,
2914 which will be handled as normal arguments. */
2915
2916 else
2917 {
2918 if (!mac_ismsgid(argv[msg_action_arg]))
9af3c549 2919 exim_fail("exim: malformed message id %s after %s option\n",
059ec3d9 2920 argv[msg_action_arg], arg);
059ec3d9
PH
2921 i++;
2922 }
2923 break;
2924
2925
2926 /* Some programs seem to call the -om option without the leading o;
2927 for sendmail it askes for "me too". Exim always does this. */
2928
2929 case 'm':
2930 if (*argrest != 0) badarg = TRUE;
2931 break;
2932
2933
2934 /* -N: don't do delivery - a debugging option that stops transports doing
2935 their thing. It implies debugging at the D_v level. */
2936
2937 case 'N':
2938 if (*argrest == 0)
2939 {
8768d548 2940 f.dont_deliver = TRUE;
059ec3d9
PH
2941 debug_selector |= D_v;
2942 debug_file = stderr;
2943 }
2944 else badarg = TRUE;
2945 break;
2946
2947
12f69989
PP
2948 /* -n: This means "don't alias" in sendmail, apparently.
2949 For normal invocations, it has no effect.
2950 It may affect some other options. */
059ec3d9
PH
2951
2952 case 'n':
12f69989 2953 flag_n = TRUE;
059ec3d9
PH
2954 break;
2955
2956 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2957 option to the specified value. This form uses long names. We need to handle
2958 -O option=value and -Ooption=value. */
2959
2960 case 'O':
2961 if (*argrest == 0)
2962 {
2963 if (++i >= argc)
9af3c549 2964 exim_fail("exim: string expected after -O\n");
059ec3d9
PH
2965 }
2966 break;
2967
2968 case 'o':
2969
2970 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2971 file" option). */
2972
2973 if (*argrest == 'A')
2974 {
2975 alias_arg = argrest + 1;
2976 if (alias_arg[0] == 0)
2977 {
2978 if (i+1 < argc) alias_arg = argv[++i]; else
9af3c549 2979 exim_fail("exim: string expected after -oA\n");
059ec3d9
PH
2980 }
2981 }
2982
2983 /* -oB: Set a connection message max value for remote deliveries */
2984
2985 else if (*argrest == 'B')
2986 {
2987 uschar *p = argrest + 1;
2988 if (p[0] == 0)
2989 {
2990 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2991 {
2992 connection_max_messages = 1;
2993 p = NULL;
2994 }
2995 }
2996
2997 if (p != NULL)
2998 {
2999 if (!isdigit(*p))
9af3c549 3000 exim_fail("exim: number expected after -oB\n");
059ec3d9
PH
3001 connection_max_messages = Uatoi(p);
3002 }
3003 }
3004
3005 /* -odb: background delivery */
3006
3007 else if (Ustrcmp(argrest, "db") == 0)
3008 {
8768d548 3009 f.synchronous_delivery = FALSE;
059ec3d9
PH
3010 arg_queue_only = FALSE;
3011 queue_only_set = TRUE;
3012 }
3013
3014 /* -odf: foreground delivery (smail-compatible option); same effect as
3015 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3016 */
3017
3018 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
3019 {
8768d548 3020 f.synchronous_delivery = TRUE;
059ec3d9
PH
3021 arg_queue_only = FALSE;
3022 queue_only_set = TRUE;
3023 }
3024
3025 /* -odq: queue only */
3026
3027 else if (Ustrcmp(argrest, "dq") == 0)
3028 {
8768d548 3029 f.synchronous_delivery = FALSE;
059ec3d9
PH
3030 arg_queue_only = TRUE;
3031 queue_only_set = TRUE;
3032 }
3033
3034 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3035 but no remote delivery */
3036
3037 else if (Ustrcmp(argrest, "dqs") == 0)
3038 {
8768d548 3039 f.queue_smtp = TRUE;
059ec3d9
PH
3040 arg_queue_only = FALSE;
3041 queue_only_set = TRUE;
3042 }
3043
3044 /* -oex: Sendmail error flags. As these are also accepted without the
3045 leading -o prefix, for compatibility with vacation and other callers,
3046 they are handled with -e above. */
3047
3048 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3049 -oitrue: Another sendmail syntax for the same */
3050
3051 else if (Ustrcmp(argrest, "i") == 0 ||
3052 Ustrcmp(argrest, "itrue") == 0)
8768d548 3053 f.dot_ends = FALSE;
059ec3d9
PH
3054
3055 /* -oM*: Set various characteristics for an incoming message; actually
3056 acted on for trusted callers only. */
3057
3058 else if (*argrest == 'M')
3059 {
3060 if (i+1 >= argc)
9af3c549 3061 exim_fail("exim: data expected after -o%s\n", argrest);
059ec3d9
PH
3062
3063 /* -oMa: Set sender host address */
3064
3065 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3066
3067 /* -oMaa: Set authenticator name */
3068
3069 else if (Ustrcmp(argrest, "Maa") == 0)
3070 sender_host_authenticated = argv[++i];
3071
3072 /* -oMas: setting authenticated sender */
3073
f3ebb786
JH
3074 else if (Ustrcmp(argrest, "Mas") == 0)
3075 authenticated_sender = string_copy_taint(argv[++i], TRUE);
059ec3d9
PH
3076
3077 /* -oMai: setting authenticated id */
3078
f3ebb786
JH
3079 else if (Ustrcmp(argrest, "Mai") == 0)
3080 authenticated_id = string_copy_taint(argv[++i], TRUE);
059ec3d9
PH
3081
3082 /* -oMi: Set incoming interface address */
3083
3084 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3085
d2af03f4
HS
3086 /* -oMm: Message reference */
3087
3088 else if (Ustrcmp(argrest, "Mm") == 0)
3089 {
3090 if (!mac_ismsgid(argv[i+1]))
9af3c549 3091 exim_fail("-oMm must be a valid message ID\n");
8768d548 3092 if (!f.trusted_config)
9af3c549 3093 exim_fail("-oMm must be called by a trusted user/config\n");
d2af03f4
HS
3094 message_reference = argv[++i];
3095 }
3096
059ec3d9
PH
3097 /* -oMr: Received protocol */
3098
65e061b7
HSHR
3099 else if (Ustrcmp(argrest, "Mr") == 0)
3100
3101 if (received_protocol)
9af3c549
JH
3102 exim_fail("received_protocol is set already\n");
3103 else
3104 received_protocol = argv[++i];
059ec3d9
PH
3105
3106 /* -oMs: Set sender host name */
3107
f3ebb786
JH
3108 else if (Ustrcmp(argrest, "Ms") == 0)
3109 sender_host_name = string_copy_taint(argv[++i], TRUE);
059ec3d9
PH
3110
3111 /* -oMt: Set sender ident */
3112
33d73e3b
PH
3113 else if (Ustrcmp(argrest, "Mt") == 0)
3114 {
3115 sender_ident_set = TRUE;
3116 sender_ident = argv[++i];
3117 }
059ec3d9
PH
3118
3119 /* Else a bad argument */
3120
3121 else
3122 {
3123 badarg = TRUE;
3124 break;
3125 }
3126 }
3127
3128 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3129 seem to call this as -m (undocumented), so that is also accepted (see
3130 above). */
3131
3132 else if (Ustrcmp(argrest, "m") == 0) {}
3133
3134 /* -oo: An ancient flag for old-style addresses which still seems to
3135 crop up in some calls (see in SCO). */
3136
3137 else if (Ustrcmp(argrest, "o") == 0) {}
3138
01446a56
JH
3139 /* -oP <name>: set pid file path for daemon
3140 -oPX: delete pid file of daemon */
059ec3d9
PH
3141
3142 else if (Ustrcmp(argrest, "P") == 0)
3143 override_pid_file_path = argv[++i];
3144
01446a56
JH
3145 else if (Ustrcmp(argrest, "PX") == 0)
3146 delete_pid_file();
3147
059ec3d9
PH
3148 /* -or <n>: set timeout for non-SMTP acceptance
3149 -os <n>: set timeout for SMTP acceptance */
3150
3151 else if (*argrest == 'r' || *argrest == 's')
3152 {
3153 int *tp = (*argrest == 'r')?
3154 &arg_receive_timeout : &arg_smtp_receive_timeout;
3155 if (argrest[1] == 0)
3156 {
3157 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3158 }
3159 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3160 if (*tp < 0)
9af3c549 3161 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
059ec3d9
PH
3162 }
3163
3164 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3165
3166 else if (Ustrcmp(argrest, "X") == 0)
3167 override_local_interfaces = argv[++i];
3168
3169 /* Unknown -o argument */
3170
3171 else badarg = TRUE;
3172 break;
3173
3174
3175 /* -ps: force Perl startup; -pd force delayed Perl startup */
3176
3177 case 'p':
3178 #ifdef EXIM_PERL
3179 if (*argrest == 's' && argrest[1] == 0)
3180 {
3181 perl_start_option = 1;
3182 break;
3183 }
3184 if (*argrest == 'd' && argrest[1] == 0)
3185 {
3186 perl_start_option = -1;
3187 break;
3188 }
3189 #endif
3190
3191 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3192 which sets the host protocol and host name */
3193
3194 if (*argrest == 0)
5bfe3b35
JH
3195 if (i+1 < argc)
3196 argrest = argv[++i];
3197 else
059ec3d9 3198 { badarg = TRUE; break; }
059ec3d9
PH
3199
3200 if (*argrest != 0)
3201 {
65e061b7
HSHR
3202 uschar *hn;
3203
3204 if (received_protocol)
9af3c549 3205 exim_fail("received_protocol is set already\n");
65e061b7
HSHR
3206
3207 hn = Ustrchr(argrest, ':');
059ec3d9 3208 if (hn == NULL)
059ec3d9 3209 received_protocol = argrest;
059ec3d9
PH
3210 else
3211 {
90341c71
JH
3212 int old_pool = store_pool;
3213 store_pool = POOL_PERM;
059ec3d9 3214 received_protocol = string_copyn(argrest, hn - argrest);
90341c71 3215 store_pool = old_pool;
059ec3d9
PH
3216 sender_host_name = hn + 1;
3217 }
3218 }
3219 break;
3220
3221
3222 case 'q':
3223 receiving_message = FALSE;
3cc66b45 3224 if (queue_interval >= 0)
9af3c549 3225 exim_fail("exim: -q specified more than once\n");
059ec3d9
PH
3226
3227 /* -qq...: Do queue runs in a 2-stage manner */
3228
3229 if (*argrest == 'q')
3230 {
8768d548 3231 f.queue_2stage = TRUE;
059ec3d9
PH
3232 argrest++;
3233 }
3234
3235 /* -qi...: Do only first (initial) deliveries */
3236
3237 if (*argrest == 'i')
3238 {
8768d548 3239 f.queue_run_first_delivery = TRUE;
059ec3d9
PH
3240 argrest++;
3241 }
3242
3243 /* -qf...: Run the queue, forcing deliveries
3244 -qff..: Ditto, forcing thawing as well */
3245
3246 if (*argrest == 'f')
3247 {
8768d548 3248 f.queue_run_force = TRUE;
55e70e76 3249 if (*++argrest == 'f')
059ec3d9 3250 {
8768d548 3251 f.deliver_force_thaw = TRUE;
059ec3d9
PH
3252 argrest++;
3253 }
3254 }
3255
3256 /* -q[f][f]l...: Run the queue only on local deliveries */
3257
3258 if (*argrest == 'l')
3259 {
8768d548 3260 f.queue_run_local = TRUE;
059ec3d9
PH
3261 argrest++;
3262 }
3263
55e70e76 3264 /* -q[f][f][l][G<name>]... Work on the named queue */
28b3821f
JH
3265
3266 if (*argrest == 'G')
3267 {
fa665e0b
JH
3268 int i;
3269 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3270 queue_name = string_copyn(argrest, i);
3271 argrest += i;
3272 if (*argrest == '/') argrest++;
28b3821f
JH
3273 }
3274
3275 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3276 only, optionally named, optionally starting from a given message id. */
059ec3d9 3277
e5903596
JH
3278 if (!(list_queue || count_queue))
3279 if (*argrest == 0
3280 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3281 {
3282 queue_interval = 0;
3283 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3284 start_queue_run_id = argv[++i];
3285 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3286 stop_queue_run_id = argv[++i];
3287 }
059ec3d9 3288
fa665e0b
JH
3289 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3290 forced, optionally local only, optionally named. */
059ec3d9 3291
e5903596
JH
3292 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3293 0, FALSE)) <= 0)
3294 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
059ec3d9
PH
3295 break;
3296
3297
3298 case 'R': /* Synonymous with -qR... */
3299 receiving_message = FALSE;
3300
3301 /* -Rf: As -R (below) but force all deliveries,
3302 -Rff: Ditto, but also thaw all frozen messages,
3303 -Rr: String is regex
3304 -Rrf: Regex and force
3305 -Rrff: Regex and force and thaw
3306
3307 in all cases provided there are no further characters in this
3308 argument. */
3309
3310 if (*argrest != 0)
d7978c0f 3311 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3312 if (Ustrcmp(argrest, rsopts[i]) == 0)
3313 {
8768d548
JH
3314 if (i != 2) f.queue_run_force = TRUE;
3315 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3316 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3317 argrest += Ustrlen(rsopts[i]);
3318 }
059ec3d9
PH
3319
3320 /* -R: Set string to match in addresses for forced queue run to
3321 pick out particular messages. */
3322
55e70e76
JH
3323 if (*argrest)
3324 deliver_selectstring = argrest;
3325 else if (i+1 < argc)
3326 deliver_selectstring = argv[++i];
3327 else
9af3c549 3328 exim_fail("exim: string expected after -R\n");
059ec3d9
PH
3329 break;
3330
3331
3332 /* -r: an obsolete synonym for -f (see above) */
3333
3334
3335 /* -S: Like -R but works on sender. */
3336
3337 case 'S': /* Synonymous with -qS... */
3338 receiving_message = FALSE;
3339
3340 /* -Sf: As -S (below) but force all deliveries,
3341 -Sff: Ditto, but also thaw all frozen messages,
3342 -Sr: String is regex
3343 -Srf: Regex and force
3344 -Srff: Regex and force and thaw
3345
3346 in all cases provided there are no further characters in this
3347 argument. */
3348
55e70e76 3349 if (*argrest)
d7978c0f 3350 for (int i = 0; i < nelem(rsopts); i++)
059ec3d9
PH
3351 if (Ustrcmp(argrest, rsopts[i]) == 0)
3352 {
8768d548
JH
3353 if (i != 2) f.queue_run_force = TRUE;
3354 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3355 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
059ec3d9
PH
3356 argrest += Ustrlen(rsopts[i]);
3357 }
059ec3d9
PH
3358
3359 /* -S: Set string to match in addresses for forced queue run to
3360 pick out particular messages. */
3361
55e70e76
JH
3362 if (*argrest)
3363 deliver_selectstring_sender = argrest;
3364 else if (i+1 < argc)
3365 deliver_selectstring_sender = argv[++i];
3366 else
9af3c549 3367 exim_fail("exim: string expected after -S\n");
059ec3d9
PH
3368 break;
3369
3370 /* -Tqt is an option that is exclusively for use by the testing suite.
3371 It is not recognized in other circumstances. It allows for the setting up
3372 of explicit "queue times" so that various warning/retry things can be
3373 tested. Otherwise variability of clock ticks etc. cause problems. */
3374
3375 case 'T':
8768d548 3376 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
059ec3d9
PH
3377 fudged_queue_times = argv[++i];
3378 else badarg = TRUE;
3379 break;
3380
3381
3382 /* -t: Set flag to extract recipients from body of message. */
3383
3384 case 't':
3385 if (*argrest == 0) extract_recipients = TRUE;
3386
3387 /* -ti: Set flag to extract recipients from body of message, and also
3388 specify that dot does not end the message. */
3389
3390 else if (Ustrcmp(argrest, "i") == 0)
3391 {
3392 extract_recipients = TRUE;
8768d548 3393 f.dot_ends = FALSE;
059ec3d9
PH
3394 }
3395
3396 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3397
01603eec 3398 #ifndef DISABLE_TLS
817d9f57 3399 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3400 #endif
3401
3402 else badarg = TRUE;
3403 break;
3404
3405
3406 /* -U: This means "initial user submission" in sendmail, apparently. The
3407 doc claims that in future sendmail may refuse syntactically invalid
3408 messages instead of fixing them. For the moment, we just ignore it. */
3409
3410 case 'U':
3411 break;
3412
3413
3414 /* -v: verify things - this is a very low-level debugging */
3415
3416 case 'v':
3417 if (*argrest == 0)
3418 {
3419 debug_selector |= D_v;
3420 debug_file = stderr;
3421 }
3422 else badarg = TRUE;
3423 break;
3424
3425
3426 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3427
3428 The -x flag tells the sendmail command that mail from a local
3429 mail program has National Language Support (NLS) extended characters
3430 in the body of the mail item. The sendmail command can send mail with
3431 extended NLS characters across networks that normally corrupts these
3432 8-bit characters.
3433
3434 As Exim is 8-bit clean, it just ignores this flag. */
3435
3436 case 'x':
3437 if (*argrest != 0) badarg = TRUE;
3438 break;
3439
a3fb9793
PP
3440 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3441 logs to that file. We swallow the parameter and otherwise ignore it. */
3442
3443 case 'X':
3444 if (*argrest == '\0')
a3fb9793 3445 if (++i >= argc)
9af3c549 3446 exim_fail("exim: string expected after -X\n");
0ad2e0fc
JH
3447 break;
3448
3449 case 'z':
3450 if (*argrest == '\0')
9af3c549
JH
3451 if (++i < argc)
3452 log_oneline = argv[i];
3453 else
3454 exim_fail("exim: file name expected after %s\n", argv[i-1]);
a3fb9793
PP
3455 break;
3456
059ec3d9
PH
3457 /* All other initial characters are errors */
3458
3459 default:
3460 badarg = TRUE;
3461 break;
3462 } /* End of high-level switch statement */
3463
3464 /* Failed to recognize the option, or syntax error */
3465
3466 if (badarg)
9af3c549 3467 exim_fail("exim abandoned: unknown, malformed, or incomplete "
059ec3d9 3468 "option %s\n", arg);
059ec3d9
PH
3469 }
3470
3471
3cc66b45
PH
3472/* If -R or -S have been specified without -q, assume a single queue run. */
3473
55e70e76
JH
3474if ( (deliver_selectstring || deliver_selectstring_sender)
3475 && queue_interval < 0)
3476 queue_interval = 0;
3cc66b45
PH
3477
3478
059ec3d9 3479END_ARG:
81ea09ca
NM
3480/* If usage_wanted is set we call the usage function - which never returns */
3481if (usage_wanted) exim_usage(called_as);
3482
3483/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3484if ((
3485 (smtp_input || extract_recipients || recipients_arg < argc) &&
8768d548 3486 (f.daemon_listen || queue_interval >= 0 || bi_option ||
059ec3d9 3487 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3488 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3489 ) ||
3490 (
3491 msg_action_arg > 0 &&
8768d548 3492 (f.daemon_listen || queue_interval > 0 || list_options ||
0ef732d9
PH
3493 (checking && msg_action != MSG_LOAD) ||
3494 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3495 ) ||
3496 (
8768d548 3497 (f.daemon_listen || queue_interval > 0) &&
059ec3d9 3498 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3499 bi_option)
059ec3d9
PH
3500 ) ||
3501 (
8768d548 3502 f.daemon_listen && queue_interval == 0
059ec3d9
PH
3503 ) ||
3504 (
8768d548 3505 f.inetd_wait_mode && queue_interval >= 0
9ee44efb
PP
3506 ) ||
3507 (
059ec3d9
PH
3508 list_options &&
3509 (checking || smtp_input || extract_recipients ||
f05da2e8 3510 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3511 ) ||
3512 (
3513 verify_address_mode &&
8768d548 3514 (f.address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3515 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3516 ) ||
3517 (
8768d548 3518 f.address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3519 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3520 ) ||
3521 (
f05da2e8 3522 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3523 extract_recipients)
3524 ) ||
3525 (
3526 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3527 ) ||
3528 (
3529 msg_action == MSG_LOAD &&
3530 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3531 )
3532 )
9af3c549 3533 exim_fail("exim: incompatible command-line options or arguments\n");
059ec3d9
PH
3534
3535/* If debugging is set up, set the file and the file descriptor to pass on to
3536child processes. It should, of course, be 2 for stderr. Also, force the daemon
3537to run in the foreground. */
3538
3539if (debug_selector != 0)
3540 {
3541 debug_file = stderr;
3542 debug_fd = fileno(debug_file);
8768d548 3543 f.background_daemon = FALSE;
9f01e50d 3544 testharness_pause_ms(100); /* lets caller finish */
059ec3d9
PH
3545 if (debug_selector != D_v) /* -v only doesn't show this */
3546 {
3547 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3548 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3549 debug_selector);
6545de78
PP
3550 if (!version_printed)
3551 show_whats_supported(stderr);
059ec3d9
PH
3552 }
3553 }
3554
3555/* When started with root privilege, ensure that the limits on the number of
3556open files and the number of processes (where that is accessible) are
3557sufficiently large, or are unset, in case Exim has been called from an
3558environment where the limits are screwed down. Not all OS have the ability to
3559change some of these limits. */
3560
3561if (unprivileged)
3562 {
3563 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3564 }
3565else
3566 {
3567 struct rlimit rlp;
3568
3569 #ifdef RLIMIT_NOFILE
3570 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3571 {
3572 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3573 strerror(errno));
3574 rlp.rlim_cur = rlp.rlim_max = 0;
3575 }
eb2c0248
PH
3576
3577 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3578 be exceeded. It turns out that some older OS have a fixed upper limit of
3579 256. */
eb2c0248 3580
059ec3d9
PH
3581 if (rlp.rlim_cur < 1000)
3582 {
3583 rlp.rlim_cur = rlp.rlim_max = 1000;
3584 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3585 {
a494b1e1
PH
3586 rlp.rlim_cur = rlp.rlim_max = 256;
3587 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3588 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3589 strerror(errno));
eb2c0248 3590 }
059ec3d9
PH
3591 }
3592 #endif
3593
3594 #ifdef RLIMIT_NPROC
3595 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3596 {
3597 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3598 strerror(errno));
3599 rlp.rlim_cur = rlp.rlim_max = 0;
3600 }
3601
3602 #ifdef RLIM_INFINITY
3603 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3604 {
3605 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3606 #else
3607 if (rlp.rlim_cur < 1000)
3608 {
3609 rlp.rlim_cur = rlp.rlim_max = 1000;
3610 #endif
3611 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3612 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3613 strerror(errno));
3614 }
3615 #endif
3616 }
3617
3618/* Exim is normally entered as root (but some special configurations are
3619possible that don't do this). However, it always spins off sub-processes that
3620set their uid and gid as required for local delivery. We don't want to pass on
3621any extra groups that root may belong to, so we want to get rid of them all at
3622this point.
3623
3624We need to obey setgroups() at this stage, before possibly giving up root
3625privilege for a changed configuration file, but later on we might need to
3626check on the additional groups for the admin user privilege - can't do that
3627till after reading the config, which might specify the exim gid. Therefore,
3628save the group list here first. */
3629
157d73b5 3630if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
9af3c549 3631 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
059ec3d9
PH
3632
3633/* There is a fundamental difference in some BSD systems in the matter of
3634groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3635known not to be different. On the "different" systems there is a single group
3636list, and the first entry in it is the current group. On all other versions of
3637Unix there is a supplementary group list, which is in *addition* to the current
3638group. Consequently, to get rid of all extraneous groups on a "standard" system
3639you pass over 0 groups to setgroups(), while on a "different" system you pass
3640over a single group - the current group, which is always the first group in the
3641list. Calling setgroups() with zero groups on a "different" system results in
3642an error return. The following code should cope with both types of system.
3643
3b7ac02c
JH
3644 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3645 the "setgroups() with zero groups" - and changes the egid.
3646 Thanks to that we had to stash the original_egid above, for use below
3647 in the call to exim_setugid().
3648
059ec3d9 3649However, if this process isn't running as root, setgroups() can't be used
ccbb15c9
ST
3650since you have to be root to run it, even if throwing away groups.
3651Except, sigh, for Hurd - where you can.
3652Not being root here happens only in some unusual configurations. */
059ec3d9 3653
ccbb15c9 3654if ( !unprivileged
25ef0f44 3655#ifndef OS_SETGROUPS_ZERO_DROPS_ALL