Update description of how the documentation is created.
[exim.git] / src / src / exim.c
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8669f003 1/* $Cambridge: exim/src/src/exim.c,v 1.57 2007/06/27 11:01:51 ph10 Exp $ */
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2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
184e8823 7/* Copyright (c) University of Cambridge 1995 - 2007 */
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8/* See the file NOTICE for conditions of use and distribution. */
9
10
11/* The main function: entry point, initialization, and high-level control.
12Also a few functions that don't naturally fit elsewhere. */
13
14
15#include "exim.h"
16
17
18
19/*************************************************
20* Function interface to store functions *
21*************************************************/
22
23/* We need some real functions to pass to the PCRE regular expression library
24for store allocation via Exim's store manager. The normal calls are actually
25macros that pass over location information to make tracing easier. These
26functions just interface to the standard macro calls. A good compiler will
27optimize out the tail recursion and so not make them too expensive. There
28are two sets of functions; one for use when we want to retain the compiled
29regular expression for a long time; the other for short-term use. */
30
31static void *
32function_store_get(size_t size)
33{
34return store_get((int)size);
35}
36
37static void
38function_dummy_free(void *block) { block = block; }
39
40static void *
41function_store_malloc(size_t size)
42{
43return store_malloc((int)size);
44}
45
46static void
47function_store_free(void *block)
48{
49store_free(block);
50}
51
52
53
54
55/*************************************************
56* Compile regular expression and panic on fail *
57*************************************************/
58
59/* This function is called when failure to compile a regular expression leads
60to a panic exit. In other cases, pcre_compile() is called directly. In many
61cases where this function is used, the results of the compilation are to be
62placed in long-lived store, so we temporarily reset the store management
63functions that PCRE uses if the use_malloc flag is set.
64
65Argument:
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
69
70Returns: pointer to the compiled pattern
71*/
72
73const pcre *
74regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
75{
76int offset;
77int options = PCRE_COPT;
78const pcre *yield;
79const uschar *error;
80if (use_malloc)
81 {
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
84 }
85if (caseless) options |= PCRE_CASELESS;
86yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87pcre_malloc = function_store_get;
88pcre_free = function_dummy_free;
89if (yield == NULL)
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
92return yield;
93}
94
95
96
97
98/*************************************************
99* Execute regular expression and set strings *
100*************************************************/
101
102/* This function runs a regular expression match, and sets up the pointers to
103the matched substrings.
104
105Arguments:
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
112
113Returns: TRUE or FALSE
114*/
115
116BOOL
117regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
118{
119int ovector[3*(EXPAND_MAXN+1)];
120int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
122BOOL yield = n >= 0;
123if (n == 0) n = EXPAND_MAXN + 1;
124if (yield)
125 {
126 int nn;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
129 {
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
132 }
133 expand_nmax--;
134 }
135return yield;
136}
137
138
139
140
141/*************************************************
142* Handler for SIGUSR1 *
143*************************************************/
144
145/* SIGUSR1 causes any exim process to write to the process log details of
146what it is currently doing. It will only be used if the OS is capable of
147setting up a handler that causes automatic restarting of any system call
148that is in progress at the time.
149
150Argument: the signal number (SIGUSR1)
151Returns: nothing
152*/
153
154static void
155usr1_handler(int sig)
156{
157sig = sig; /* Keep picky compilers happy */
158log_write(0, LOG_PROCESS, "%s", process_info);
159log_close_all();
160os_restarting_signal(SIGUSR1, usr1_handler);
161}
162
163
164
165/*************************************************
166* Timeout handler *
167*************************************************/
168
169/* This handler is enabled most of the time that Exim is running. The handler
170doesn't actually get used unless alarm() has been called to set a timer, to
171place a time limit on a system call of some kind. When the handler is run, it
172re-enables itself.
173
174There are some other SIGALRM handlers that are used in special cases when more
175than just a flag setting is required; for example, when reading a message's
176input. These are normally set up in the code module that uses them, and the
177SIGALRM handler is reset to this one afterwards.
178
179Argument: the signal value (SIGALRM)
180Returns: nothing
181*/
182
183void
184sigalrm_handler(int sig)
185{
186sig = sig; /* Keep picky compilers happy */
187sigalrm_seen = TRUE;
188os_non_restarting_signal(SIGALRM, sigalrm_handler);
189}
190
191
192
193/*************************************************
194* Sleep for a fractional time interval *
195*************************************************/
196
197/* This function is called by millisleep() and exim_wait_tick() to wait for a
198period of time that may include a fraction of a second. The coding is somewhat
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199tedious. We do not expect setitimer() ever to fail, but if it does, the process
200will wait for ever, so we panic in this instance. (There was a case of this
201when a bug in a function that calls milliwait() caused it to pass invalid data.
7086e875 202That's when I added the check. :-)
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203
204Argument: an itimerval structure containing the interval
205Returns: nothing
206*/
207
208static void
209milliwait(struct itimerval *itval)
210{
211sigset_t sigmask;
212sigset_t old_sigmask;
213(void)sigemptyset(&sigmask); /* Empty mask */
214(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 216if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
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217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
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219(void)sigfillset(&sigmask); /* All signals */
220(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221(void)sigsuspend(&sigmask); /* Until SIGALRM */
222(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
223}
224
225
226
227
228/*************************************************
229* Millisecond sleep function *
230*************************************************/
231
232/* The basic sleep() function has a granularity of 1 second, which is too rough
233in some cases - for example, when using an increasing delay to slow down
234spammers.
235
236Argument: number of millseconds
237Returns: nothing
238*/
239
240void
241millisleep(int msec)
242{
243struct itimerval itval;
244itval.it_interval.tv_sec = 0;
245itval.it_interval.tv_usec = 0;
246itval.it_value.tv_sec = msec/1000;
247itval.it_value.tv_usec = (msec % 1000) * 1000;
248milliwait(&itval);
249}
250
251
252
253/*************************************************
254* Compare microsecond times *
255*************************************************/
256
257/*
258Arguments:
259 tv1 the first time
260 tv2 the second time
261
262Returns: -1, 0, or +1
263*/
264
265int
266exim_tvcmp(struct timeval *t1, struct timeval *t2)
267{
268if (t1->tv_sec > t2->tv_sec) return +1;
269if (t1->tv_sec < t2->tv_sec) return -1;
270if (t1->tv_usec > t2->tv_usec) return +1;
271if (t1->tv_usec < t2->tv_usec) return -1;
272return 0;
273}
274
275
276
277
278/*************************************************
279* Clock tick wait function *
280*************************************************/
281
282/* Exim uses a time + a pid to generate a unique identifier in two places: its
283message IDs, and in file names for maildir deliveries. Because some OS now
284re-use pids within the same second, sub-second times are now being used.
285However, for absolute certaintly, we must ensure the clock has ticked before
286allowing the relevant process to complete. At the time of implementation of
287this code (February 2003), the speed of processors is such that the clock will
288invariably have ticked already by the time a process has done its job. This
289function prepares for the time when things are faster - and it also copes with
290clocks that go backwards.
291
292Arguments:
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
298
299Returns: nothing
300*/
301
302void
303exim_wait_tick(struct timeval *then_tv, int resolution)
304{
305struct timeval now_tv;
306long int now_true_usec;
307
308(void)gettimeofday(&now_tv, NULL);
309now_true_usec = now_tv.tv_usec;
310now_tv.tv_usec = (now_true_usec/resolution) * resolution;
311
312if (exim_tvcmp(&now_tv, then_tv) <= 0)
313 {
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
319
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
324
325 if (itval.it_value.tv_usec < 0)
326 {
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
329 }
330
331 DEBUG(D_transport|D_receive)
332 {
333 if (!running_in_test_harness)
334 {
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
339 }
340 }
341
342 milliwait(&itval);
343 }
344}
345
346
347
348
349/*************************************************
350* Set up processing details *
351*************************************************/
352
353/* Save a text string for dumping when SIGUSR1 is received.
354Do checks for overruns.
355
356Arguments: format and arguments, as for printf()
357Returns: nothing
358*/
359
360void
361set_process_info(char *format, ...)
362{
363int len;
364va_list ap;
365sprintf(CS process_info, "%5d ", (int)getpid());
366len = Ustrlen(process_info);
367va_start(ap, format);
368if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
371va_end(ap);
372}
373
374
375
376
377
378/*************************************************
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379* Call fopen() with umask 777 and adjust mode *
380*************************************************/
381
382/* Exim runs with umask(0) so that files created with open() have the mode that
383is specified in the open() call. However, there are some files, typically in
384the spool directory, that are created with fopen(). They end up world-writeable
385if no precautions are taken. Although the spool directory is not accessible to
386the world, this is an untidiness. So this is a wrapper function for fopen()
387that sorts out the mode of the created file.
388
389Arguments:
390 filename the file name
391 options the fopen() options
392 mode the required mode
393
394Returns: the fopened FILE or NULL
395*/
396
397FILE *
398modefopen(uschar *filename, char *options, mode_t mode)
399{
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400mode_t saved_umask = umask(0777);
401FILE *f = Ufopen(filename, options);
402(void)umask(saved_umask);
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403if (f != NULL) (void)fchmod(fileno(f), mode);
404return f;
405}
406
407
408
409
410/*************************************************
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411* Ensure stdin, stdout, and stderr exist *
412*************************************************/
413
414/* Some operating systems grumble if an exec() happens without a standard
415input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416file will be opened and will use these fd values, and then some other bit of
417code will assume, for example, that it can write error messages to stderr.
418This function ensures that fds 0, 1, and 2 are open if they do not already
419exist, by connecting them to /dev/null.
420
421This function is also used to ensure that std{in,out,err} exist at all times,
422so that if any library that Exim calls tries to use them, it doesn't crash.
423
424Arguments: None
425Returns: Nothing
426*/
427
428void
429exim_nullstd(void)
430{
431int i;
432int devnull = -1;
433struct stat statbuf;
434for (i = 0; i <= 2; i++)
435 {
436 if (fstat(i, &statbuf) < 0 && errno == EBADF)
437 {
438 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
439 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
440 string_open_failed(errno, "/dev/null"));
1fe64dcc 441 if (devnull != i) (void)dup2(devnull, i);
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442 }
443 }
1fe64dcc 444if (devnull > 2) (void)close(devnull);
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445}
446
447
448
449
450/*************************************************
451* Close unwanted file descriptors for delivery *
452*************************************************/
453
454/* This function is called from a new process that has been forked to deliver
455an incoming message, either directly, or using exec.
456
457We want any smtp input streams to be closed in this new process. However, it
458has been observed that using fclose() here causes trouble. When reading in -bS
459input, duplicate copies of messages have been seen. The files will be sharing a
460file pointer with the parent process, and it seems that fclose() (at least on
461some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462least sometimes. Hence we go for closing the underlying file descriptors.
463
464If TLS is active, we want to shut down the TLS library, but without molesting
465the parent's SSL connection.
466
467For delivery of a non-SMTP message, we want to close stdin and stdout (and
468stderr unless debugging) because the calling process might have set them up as
469pipes and be waiting for them to close before it waits for the submission
470process to terminate. If they aren't closed, they hold up the calling process
471until the initial delivery process finishes, which is not what we want.
472
473Exception: We do want it for synchronous delivery!
474
475And notwithstanding all the above, if D_resolver is set, implying resolver
476debugging, leave stdout open, because that's where the resolver writes its
477debugging output.
478
479When we close stderr (which implies we've also closed stdout), we also get rid
480of any controlling terminal.
481
482Arguments: None
483Returns: Nothing
484*/
485
486static void
487close_unwanted(void)
488{
489if (smtp_input)
490 {
491 #ifdef SUPPORT_TLS
492 tls_close(FALSE); /* Shut down the TLS library */
493 #endif
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494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
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496 smtp_in = NULL;
497 }
498else
499 {
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500 (void)close(0); /* stdin */
501 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
502 if (debug_selector == 0) /* stderr */
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503 {
504 if (!synchronous_delivery)
505 {
1fe64dcc 506 (void)close(2);
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507 log_stderr = NULL;
508 }
509 (void)setsid();
510 }
511 }
512}
513
514
515
516
517/*************************************************
518* Set uid and gid *
519*************************************************/
520
521/* This function sets a new uid and gid permanently, optionally calling
522initgroups() to set auxiliary groups. There are some special cases when running
523Exim in unprivileged modes. In these situations the effective uid will not be
524root; if we already have the right effective uid/gid, and don't need to
525initialize any groups, leave things as they are.
526
527Arguments:
528 uid the uid
529 gid the gid
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
532
533Returns: nothing; bombs out on failure
534*/
535
536void
537exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
538{
539uid_t euid = geteuid();
540gid_t egid = getegid();
541
542if (euid == root_uid || euid != uid || egid != gid || igflag)
543 {
544 /* At least one OS returns +1 for initgroups failure, so just check for
545 non-zero. */
546
547 if (igflag)
548 {
549 struct passwd *pw = getpwuid(uid);
550 if (pw != NULL)
551 {
552 if (initgroups(pw->pw_name, gid) != 0)
553 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
554 (long int)uid, strerror(errno));
555 }
556 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid);
558 }
559
560 if (setgid(gid) < 0 || setuid(uid) < 0)
561 {
562 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
564 }
565 }
566
567/* Debugging output included uid/gid and all groups */
568
569DEBUG(D_uid)
570 {
571 int group_count;
572 gid_t group_list[NGROUPS_MAX];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count = getgroups(NGROUPS_MAX, group_list);
576 debug_printf(" auxiliary group list:");
577 if (group_count > 0)
578 {
579 int i;
580 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
581 }
582 else debug_printf(" <none>");
583 debug_printf("\n");
584 }
585}
586
587
588
589
590/*************************************************
591* Exit point *
592*************************************************/
593
594/* Exim exits via this function so that it always clears up any open
595databases.
596
597Arguments:
598 rc return code
599
600Returns: does not return
601*/
602
603void
604exim_exit(int rc)
605{
606search_tidyup();
607DEBUG(D_any)
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
610exit(rc);
611}
612
613
614
615
616/*************************************************
617* Extract port from host address *
618*************************************************/
619
620/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
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621It also checks the syntax of the address, and terminates it before the
622port data when a port is extracted.
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623
624Argument:
625 address the address, with possible port on the end
626
627Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
629*/
630
631static int
632check_port(uschar *address)
633{
7cd1141b 634int port = host_address_extract_port(address);
8e669ac1 635if (string_is_ip_address(address, NULL) == 0)
059ec3d9
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636 {
637 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
638 exit(EXIT_FAILURE);
639 }
640return port;
641}
642
643
644
645/*************************************************
646* Test/verify an address *
647*************************************************/
648
649/* This function is called by the -bv and -bt code. It extracts a working
650address from a full RFC 822 address. This isn't really necessary per se, but it
651has the effect of collapsing source routes.
652
653Arguments:
654 s the address string
655 flags flag bits for verify_address()
656 exit_value to be set for failures
657
a5a28604 658Returns: nothing
059ec3d9
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659*/
660
661static void
662test_address(uschar *s, int flags, int *exit_value)
663{
664int start, end, domain;
665uschar *parse_error = NULL;
666uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
667 FALSE);
668if (address == NULL)
669 {
670 fprintf(stdout, "syntax error: %s\n", parse_error);
671 *exit_value = 2;
672 }
673else
674 {
675 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 676 -1, -1, NULL, NULL, NULL);
059ec3d9
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677 if (rc == FAIL) *exit_value = 2;
678 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
679 }
680}
681
682
683
684/*************************************************
685* Decode bit settings for log/debug *
686*************************************************/
687
688/* This function decodes a string containing bit settings in the form of +name
689and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
690also recognizes a numeric setting of the form =<number>, but this is not
691intended for user use. It's an easy way for Exim to pass the debug settings
692when it is re-exec'ed.
693
694The log options are held in two unsigned ints (because there became too many
695for one). The top bit in the table means "put in 2nd selector". This does not
696yet apply to debug options, so the "=" facility sets only the first selector.
697
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698The "all" selector, which must be equal to 0xffffffff, is recognized specially.
699It sets all the bits in both selectors. However, there is a facility for then
700unsetting certain bits, because we want to turn off "memory" in the debug case.
701
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702A bad value for a debug setting is treated as an unknown option - error message
703to stderr and die. For log settings, which come from the configuration file,
704we write to the log on the way out...
705
706Arguments:
707 selector1 address of the first bit string
708 selector2 address of the second bit string, or NULL
1fe64dcc
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709 notall1 bits to exclude from "all" for selector1
710 notall2 bits to exclude from "all" for selector2
059ec3d9
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711 string the configured string
712 options the table of option names
713 count size of table
714 which "log" or "debug"
715
716Returns: nothing on success - bomb out on failure
717*/
718
719static void
1fe64dcc
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720decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
721 int notall2, uschar *string, bit_table *options, int count, uschar *which)
059ec3d9
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722{
723uschar *errmsg;
724if (string == NULL) return;
725
726if (*string == '=')
727 {
728 char *end; /* Not uschar */
729 *selector1 = strtoul(CS string+1, &end, 0);
730 if (*end == 0) return;
731 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
732 string);
733 goto ERROR_RETURN;
734 }
735
736/* Handle symbolic setting */
737
738else for(;;)
739 {
740 BOOL adding;
741 uschar *s;
742 int len;
743 bit_table *start, *end;
744
745 while (isspace(*string)) string++;
746 if (*string == 0) return;
747
748 if (*string != '+' && *string != '-')
749 {
750 errmsg = string_sprintf("malformed %s_selector setting: "
751 "+ or - expected but found \"%s\"", which, string);
752 goto ERROR_RETURN;
753 }
754
755 adding = *string++ == '+';
756 s = string;
757 while (isalnum(*string) || *string == '_') string++;
758 len = string - s;
759
760 start = options;
761 end = options + count;
762
763 while (start < end)
764 {
765 bit_table *middle = start + (end - start)/2;
766 int c = Ustrncmp(s, middle->name, len);
767 if (c == 0)
768 {
769 if (middle->name[len] != 0) c = -1; else
770 {
771 unsigned int bit = middle->bit;
772 unsigned int *selector;
773
1fe64dcc 774 /* The value with all bits set means "force all bits in both selectors"
059ec3d9 775 in the case where two are being handled. However, the top bit in the
1fe64dcc
PH
776 second selector is never set. When setting, some bits can be excluded.
777 */
059ec3d9
PH
778
779 if (bit == 0xffffffff)
780 {
1fe64dcc
PH
781 if (adding)
782 {
783 *selector1 = 0xffffffff ^ notall1;
784 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
785 }
786 else
787 {
788 *selector1 = 0;
789 if (selector2 != NULL) *selector2 = 0;
790 }
059ec3d9
PH
791 }
792
793 /* Otherwise, the 0x80000000 bit means "this value, without the top
794 bit, belongs in the second selector". */
795
796 else
797 {
798 if ((bit & 0x80000000) != 0)
799 {
800 selector = selector2;
801 bit &= 0x7fffffff;
802 }
803 else selector = selector1;
804 if (adding) *selector |= bit; else *selector &= ~bit;
805 }
806 break; /* Out of loop to match selector name */
807 }
808 }
809 if (c < 0) end = middle; else start = middle + 1;
810 } /* Loop to match selector name */
811
812 if (start >= end)
813 {
814 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
815 adding? '+' : '-', len, s);
816 goto ERROR_RETURN;
817 }
818 } /* Loop for selector names */
819
820/* Handle disasters */
821
822ERROR_RETURN:
823if (Ustrcmp(which, "debug") == 0)
824 {
825 fprintf(stderr, "exim: %s\n", errmsg);
826 exit(EXIT_FAILURE);
827 }
828else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
829}
830
831
832
833/*************************************************
834* Show supported features *
835*************************************************/
836
837/* This function is called for -bV and for -d to output the optional features
838of the current Exim binary.
839
840Arguments: a FILE for printing
841Returns: nothing
842*/
843
844static void
845show_whats_supported(FILE *f)
846{
847#ifdef DB_VERSION_STRING
848fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
849#elif defined(BTREEVERSION) && defined(HASHVERSION)
850 #ifdef USE_DB
851 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
852 #else
853 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
854 #endif
855#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
856fprintf(f, "Probably ndbm\n");
857#elif defined(USE_TDB)
858fprintf(f, "Using tdb\n");
859#else
860 #ifdef USE_GDBM
861 fprintf(f, "Probably GDBM (native mode)\n");
862 #else
863 fprintf(f, "Probably GDBM (compatibility mode)\n");
864 #endif
865#endif
866
867fprintf(f, "Support for:");
9cec981f
PH
868#ifdef SUPPORT_CRYPTEQ
869 fprintf(f, " crypteq");
870#endif
059ec3d9
PH
871#if HAVE_ICONV
872 fprintf(f, " iconv()");
873#endif
874#if HAVE_IPV6
875 fprintf(f, " IPv6");
876#endif
79378e0f
PH
877#ifdef HAVE_SETCLASSRESOURCES
878 fprintf(f, " use_setclassresources");
929ba01c 879#endif
059ec3d9
PH
880#ifdef SUPPORT_PAM
881 fprintf(f, " PAM");
882#endif
883#ifdef EXIM_PERL
884 fprintf(f, " Perl");
885#endif
1a46a8c5
PH
886#ifdef EXPAND_DLFUNC
887 fprintf(f, " Expand_dlfunc");
888#endif
059ec3d9
PH
889#ifdef USE_TCP_WRAPPERS
890 fprintf(f, " TCPwrappers");
891#endif
892#ifdef SUPPORT_TLS
893 #ifdef USE_GNUTLS
894 fprintf(f, " GnuTLS");
895 #else
896 fprintf(f, " OpenSSL");
897 #endif
898#endif
b2f5a032
PH
899#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
900 fprintf(f, " translate_ip_address");
901#endif
f174f16e
PH
902#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
903 fprintf(f, " move_frozen_messages");
904#endif
8523533c
TK
905#ifdef WITH_CONTENT_SCAN
906 fprintf(f, " Content_Scanning");
907#endif
908#ifdef WITH_OLD_DEMIME
909 fprintf(f, " Old_Demime");
910#endif
911#ifdef EXPERIMENTAL_SPF
912 fprintf(f, " Experimental_SPF");
913#endif
914#ifdef EXPERIMENTAL_SRS
915 fprintf(f, " Experimental_SRS");
916#endif
917#ifdef EXPERIMENTAL_BRIGHTMAIL
918 fprintf(f, " Experimental_Brightmail");
919#endif
fb2274d4
TK
920#ifdef EXPERIMENTAL_DOMAINKEYS
921 fprintf(f, " Experimental_DomainKeys");
922#endif
059ec3d9
PH
923fprintf(f, "\n");
924
925fprintf(f, "Lookups:");
926#ifdef LOOKUP_LSEARCH
927 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
928#endif
929#ifdef LOOKUP_CDB
930 fprintf(f, " cdb");
931#endif
932#ifdef LOOKUP_DBM
933 fprintf(f, " dbm dbmnz");
934#endif
935#ifdef LOOKUP_DNSDB
936 fprintf(f, " dnsdb");
937#endif
938#ifdef LOOKUP_DSEARCH
939 fprintf(f, " dsearch");
940#endif
941#ifdef LOOKUP_IBASE
942 fprintf(f, " ibase");
943#endif
944#ifdef LOOKUP_LDAP
945 fprintf(f, " ldap ldapdn ldapm");
946#endif
947#ifdef LOOKUP_MYSQL
948 fprintf(f, " mysql");
949#endif
950#ifdef LOOKUP_NIS
951 fprintf(f, " nis nis0");
952#endif
953#ifdef LOOKUP_NISPLUS
954 fprintf(f, " nisplus");
955#endif
956#ifdef LOOKUP_ORACLE
957 fprintf(f, " oracle");
958#endif
959#ifdef LOOKUP_PASSWD
960 fprintf(f, " passwd");
961#endif
962#ifdef LOOKUP_PGSQL
963 fprintf(f, " pgsql");
964#endif
13b685f9
PH
965#ifdef LOOKUP_SQLITE
966 fprintf(f, " sqlite");
967#endif
059ec3d9
PH
968#ifdef LOOKUP_TESTDB
969 fprintf(f, " testdb");
970#endif
971#ifdef LOOKUP_WHOSON
972 fprintf(f, " whoson");
973#endif
974fprintf(f, "\n");
975
976fprintf(f, "Authenticators:");
977#ifdef AUTH_CRAM_MD5
978 fprintf(f, " cram_md5");
979#endif
980#ifdef AUTH_CYRUS_SASL
981 fprintf(f, " cyrus_sasl");
982#endif
14aa5a05
PH
983#ifdef AUTH_DOVECOT
984 fprintf(f, " dovecot");
985#endif
059ec3d9
PH
986#ifdef AUTH_PLAINTEXT
987 fprintf(f, " plaintext");
988#endif
989#ifdef AUTH_SPA
990 fprintf(f, " spa");
991#endif
992fprintf(f, "\n");
993
994fprintf(f, "Routers:");
995#ifdef ROUTER_ACCEPT
996 fprintf(f, " accept");
997#endif
998#ifdef ROUTER_DNSLOOKUP
999 fprintf(f, " dnslookup");
1000#endif
1001#ifdef ROUTER_IPLITERAL
1002 fprintf(f, " ipliteral");
1003#endif
1004#ifdef ROUTER_IPLOOKUP
1005 fprintf(f, " iplookup");
1006#endif
1007#ifdef ROUTER_MANUALROUTE
1008 fprintf(f, " manualroute");
1009#endif
1010#ifdef ROUTER_QUERYPROGRAM
1011 fprintf(f, " queryprogram");
1012#endif
1013#ifdef ROUTER_REDIRECT
1014 fprintf(f, " redirect");
1015#endif
1016fprintf(f, "\n");
1017
1018fprintf(f, "Transports:");
1019#ifdef TRANSPORT_APPENDFILE
1020 fprintf(f, " appendfile");
1021 #ifdef SUPPORT_MAILDIR
1022 fprintf(f, "/maildir");
1023 #endif
1024 #ifdef SUPPORT_MAILSTORE
1025 fprintf(f, "/mailstore");
1026 #endif
1027 #ifdef SUPPORT_MBX
1028 fprintf(f, "/mbx");
1029 #endif
1030#endif
1031#ifdef TRANSPORT_AUTOREPLY
1032 fprintf(f, " autoreply");
1033#endif
1034#ifdef TRANSPORT_LMTP
1035 fprintf(f, " lmtp");
1036#endif
1037#ifdef TRANSPORT_PIPE
1038 fprintf(f, " pipe");
1039#endif
1040#ifdef TRANSPORT_SMTP
1041 fprintf(f, " smtp");
1042#endif
1043fprintf(f, "\n");
1044
1045if (fixed_never_users[0] > 0)
1046 {
1047 int i;
1048 fprintf(f, "Fixed never_users: ");
1049 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1050 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1051 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1052 }
21c28500
PH
1053
1054fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
059ec3d9
PH
1055}
1056
1057
1058
1059
1060/*************************************************
1061* Quote a local part *
1062*************************************************/
1063
1064/* This function is used when a sender address or a From: or Sender: header
1065line is being created from the caller's login, or from an authenticated_id. It
1066applies appropriate quoting rules for a local part.
1067
1068Argument: the local part
1069Returns: the local part, quoted if necessary
1070*/
1071
1072uschar *
1073local_part_quote(uschar *lpart)
1074{
1075BOOL needs_quote = FALSE;
1076int size, ptr;
1077uschar *yield;
1078uschar *t;
1079
1080for (t = lpart; !needs_quote && *t != 0; t++)
1081 {
1082 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1083 (*t != '.' || t == lpart || t[1] == 0);
1084 }
1085
1086if (!needs_quote) return lpart;
1087
1088size = ptr = 0;
1089yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1090
1091for (;;)
1092 {
1093 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1094 if (nq == NULL)
1095 {
1096 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1097 break;
1098 }
1099 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1100 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1101 yield = string_cat(yield, &size, &ptr, nq, 1);
1102 lpart = nq + 1;
1103 }
1104
1105yield = string_cat(yield, &size, &ptr, US"\"", 1);
1106yield[ptr] = 0;
1107return yield;
1108}
1109
1110
1111
1112#ifdef USE_READLINE
1113/*************************************************
1114* Load readline() functions *
1115*************************************************/
1116
1117/* This function is called from testing executions that read data from stdin,
1118but only when running as the calling user. Currently, only -be does this. The
1119function loads the readline() function library and passes back the functions.
1120On some systems, it needs the curses library, so load that too, but try without
1121it if loading fails. All this functionality has to be requested at build time.
1122
1123Arguments:
1124 fn_readline_ptr pointer to where to put the readline pointer
1125 fn_addhist_ptr pointer to where to put the addhistory function
1126
1127Returns: the dlopen handle or NULL on failure
1128*/
1129
1130static void *
1131set_readline(char * (**fn_readline_ptr)(char *),
1132 char * (**fn_addhist_ptr)(char *))
1133{
1134void *dlhandle;
1135void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1136
1137dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1138if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1139
1140if (dlhandle != NULL)
1141 {
1142 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1143 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1144 }
1145else
1146 {
1147 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1148 }
1149
1150return dlhandle;
1151}
1152#endif
1153
1154
1155
1156/*************************************************
1157* Get a line from stdin for testing things *
1158*************************************************/
1159
1160/* This function is called when running tests that can take a number of lines
1161of input (for example, -be and -bt). It handles continuations and trailing
1162spaces. And prompting and a blank line output on eof. If readline() is in use,
1163the arguments are non-NULL and provide the relevant functions.
1164
1165Arguments:
1166 fn_readline readline function or NULL
1167 fn_addhist addhist function or NULL
1168
1169Returns: pointer to dynamic memory, or NULL at end of file
1170*/
1171
1172static uschar *
1173get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1174{
1175int i;
1176int size = 0;
1177int ptr = 0;
1178uschar *yield = NULL;
1179
328895cc 1180if (fn_readline == NULL) { printf("> "); fflush(stdout); }
059ec3d9
PH
1181
1182for (i = 0;; i++)
1183 {
1184 uschar buffer[1024];
1185 uschar *p, *ss;
1186
1187 #ifdef USE_READLINE
1188 char *readline_line = NULL;
1189 if (fn_readline != NULL)
1190 {
1191 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1192 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1193 p = US readline_line;
1194 }
1195 else
1196 #endif
1197
1198 /* readline() not in use */
1199
1200 {
1201 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1202 p = buffer;
1203 }
1204
1205 /* Handle the line */
1206
1207 ss = p + (int)Ustrlen(p);
1208 while (ss > p && isspace(ss[-1])) ss--;
1209
1210 if (i > 0)
1211 {
1212 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1213 }
1214
1215 yield = string_cat(yield, &size, &ptr, p, ss - p);
1216
1217 #ifdef USE_READLINE
1218 if (fn_readline != NULL) free(readline_line);
1219 #endif
1220
1221 if (ss == p || yield[ptr-1] != '\\')
1222 {
1223 yield[ptr] = 0;
1224 break;
1225 }
1226 yield[--ptr] = 0;
1227 }
1228
1229if (yield == NULL) printf("\n");
1230return yield;
1231}
1232
1233
1234
1235/*************************************************
1236* Entry point and high-level code *
1237*************************************************/
1238
1239/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1240the appropriate action. All the necessary functions are present in the one
1241binary. I originally thought one should split it up, but it turns out that so
1242much of the apparatus is needed in each chunk that one might as well just have
1243it all available all the time, which then makes the coding easier as well.
1244
1245Arguments:
1246 argc count of entries in argv
1247 argv argument strings, with argv[0] being the program name
1248
1249Returns: EXIT_SUCCESS if terminated successfully
1250 EXIT_FAILURE otherwise, except when a message has been sent
1251 to the sender, and -oee was given
1252*/
1253
1254int
1255main(int argc, char **cargv)
1256{
1257uschar **argv = USS cargv;
1258int arg_receive_timeout = -1;
1259int arg_smtp_receive_timeout = -1;
1260int arg_error_handling = error_handling;
f05da2e8
PH
1261int filter_sfd = -1;
1262int filter_ufd = -1;
059ec3d9
PH
1263int group_count;
1264int i;
1265int list_queue_option = 0;
1266int msg_action = 0;
1267int msg_action_arg = -1;
1268int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1269int queue_only_reason = 0;
1270#ifdef EXIM_PERL
1271int perl_start_option = 0;
1272#endif
1273int recipients_arg = argc;
1274int sender_address_domain = 0;
1275int test_retry_arg = -1;
1276int test_rewrite_arg = -1;
1277BOOL arg_queue_only = FALSE;
1278BOOL bi_option = FALSE;
1279BOOL checking = FALSE;
1280BOOL count_queue = FALSE;
1281BOOL expansion_test = FALSE;
1282BOOL extract_recipients = FALSE;
1283BOOL forced_delivery = FALSE;
1284BOOL f_end_dot = FALSE;
1285BOOL deliver_give_up = FALSE;
1286BOOL list_queue = FALSE;
1287BOOL list_options = FALSE;
1288BOOL local_queue_only;
1289BOOL more = TRUE;
1290BOOL one_msg_action = FALSE;
1291BOOL queue_only_set = FALSE;
1292BOOL receiving_message = TRUE;
33d73e3b 1293BOOL sender_ident_set = FALSE;
8669f003 1294BOOL session_local_queue_only;
059ec3d9
PH
1295BOOL unprivileged;
1296BOOL removed_privilege = FALSE;
1297BOOL verify_address_mode = FALSE;
1298BOOL verify_as_sender = FALSE;
1299BOOL version_printed = FALSE;
1300uschar *alias_arg = NULL;
1301uschar *called_as = US"";
1302uschar *start_queue_run_id = NULL;
1303uschar *stop_queue_run_id = NULL;
328895cc 1304uschar *expansion_test_message = NULL;
059ec3d9
PH
1305uschar *ftest_domain = NULL;
1306uschar *ftest_localpart = NULL;
1307uschar *ftest_prefix = NULL;
1308uschar *ftest_suffix = NULL;
1309uschar *real_sender_address;
1310uschar *originator_home = US"/";
059ec3d9
PH
1311void *reset_point;
1312
1313struct passwd *pw;
1314struct stat statbuf;
1315pid_t passed_qr_pid = (pid_t)0;
1316int passed_qr_pipe = -1;
1317gid_t group_list[NGROUPS_MAX];
1318
1319/* Possible options for -R and -S */
1320
1321static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1322
1323/* Need to define this in case we need to change the environment in order
1324to get rid of a bogus time zone. We have to make it char rather than uschar
1325because some OS define it in /usr/include/unistd.h. */
1326
1327extern char **environ;
1328
35edf2ff 1329/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1330defined by ref:name at build time, we must now find the actual uid/gid values.
1331This is a feature to make the lives of binary distributors easier. */
1332
1333#ifdef EXIM_USERNAME
1334if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1335 {
1336 exim_gid = pw->pw_gid;
1337 }
1338else
1339 {
1340 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1341 EXIM_USERNAME);
1342 exit(EXIT_FAILURE);
1343 }
1344#endif
1345
1346#ifdef EXIM_GROUPNAME
1347if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1348 {
1349 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1350 EXIM_GROUPNAME);
1351 exit(EXIT_FAILURE);
1352 }
1353#endif
1354
1355#ifdef CONFIGURE_OWNERNAME
1356if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1357 {
1358 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1359 CONFIGURE_OWNERNAME);
1360 exit(EXIT_FAILURE);
1361 }
1362#endif
1363
35edf2ff
PH
1364#ifdef CONFIGURE_GROUPNAME
1365if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1366 {
1367 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1368 CONFIGURE_GROUPNAME);
1369 exit(EXIT_FAILURE);
1370 }
1371#endif
1372
059ec3d9
PH
1373/* In the Cygwin environment, some initialization needs doing. It is fudged
1374in by means of this macro. */
1375
1376#ifdef OS_INIT
1377OS_INIT
1378#endif
1379
1380/* Check a field which is patched when we are running Exim within its
1381testing harness; do a fast initial check, and then the whole thing. */
1382
1383running_in_test_harness =
1384 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1385
1386/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1387at the start of a program; however, it seems that some environments do not
1388follow this. A "strange" locale can affect the formatting of timestamps, so we
1389make quite sure. */
1390
1391setlocale(LC_ALL, "C");
1392
1393/* Set up the default handler for timing using alarm(). */
1394
1395os_non_restarting_signal(SIGALRM, sigalrm_handler);
1396
1397/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1398because store_malloc writes a log entry on failure. */
1399
1400log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1401if (log_buffer == NULL)
1402 {
1403 fprintf(stderr, "exim: failed to get store for log buffer\n");
1404 exit(EXIT_FAILURE);
1405 }
1406
1407/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1408NULL when the daemon is run and the file is closed. We have to use this
1409indirection, because some systems don't allow writing to the variable "stderr".
1410*/
1411
1412if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1413
1414/* Arrange for the PCRE regex library to use our store functions. Note that
1415the normal calls are actually macros that add additional arguments for
1416debugging purposes so we have to assign specially constructed functions here.
1417The default is to use store in the stacking pool, but this is overridden in the
1418regex_must_compile() function. */
1419
1420pcre_malloc = function_store_get;
1421pcre_free = function_dummy_free;
1422
1423/* Ensure there is a big buffer for temporary use in several places. It is put
1424in malloc store so that it can be freed for enlargement if necessary. */
1425
1426big_buffer = store_malloc(big_buffer_size);
1427
1428/* Set up the handler for the data request signal, and set the initial
1429descriptive text. */
1430
1431set_process_info("initializing");
1432os_restarting_signal(SIGUSR1, usr1_handler);
1433
1434/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1435in the daemon code. For the rest of Exim's uses, we ignore it. */
1436
1437signal(SIGHUP, SIG_IGN);
1438
1439/* We don't want to die on pipe errors as the code is written to handle
1440the write error instead. */
1441
1442signal(SIGPIPE, SIG_IGN);
1443
1444/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1445set to SIG_IGN. This causes subprocesses that complete before the parent
1446process waits for them not to hang around, so when Exim calls wait(), nothing
1447is there. The wait() code has been made robust against this, but let's ensure
1448that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1449ending status. We use sigaction rather than plain signal() on those OS where
1450SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1451problem on AIX with this.) */
1452
1453#ifdef SA_NOCLDWAIT
1454 {
1455 struct sigaction act;
1456 act.sa_handler = SIG_DFL;
1457 sigemptyset(&(act.sa_mask));
1458 act.sa_flags = 0;
1459 sigaction(SIGCHLD, &act, NULL);
1460 }
1461#else
1462signal(SIGCHLD, SIG_DFL);
1463#endif
1464
1465/* Save the arguments for use if we re-exec exim as a daemon after receiving
1466SIGHUP. */
1467
1468sighup_argv = argv;
1469
1470/* Set up the version number. Set up the leading 'E' for the external form of
1471message ids, set the pointer to the internal form, and initialize it to
1472indicate no message being processed. */
1473
1474version_init();
1475message_id_option[0] = '-';
1476message_id_external = message_id_option + 1;
1477message_id_external[0] = 'E';
1478message_id = message_id_external + 1;
1479message_id[0] = 0;
1480
67d175de 1481/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1482created with the modes that it specifies. NOTE: Files created with fopen() have
1483a problem, which was not recognized till rather late (February 2006). With this
1484umask, such files will be world writeable. (They are all content scanning files
1485in the spool directory, which isn't world-accessible, so this is not a
1486disaster, but it's untidy.) I don't want to change this overall setting,
1487however, because it will interact badly with the open() calls. Instead, there's
1488now a function called modefopen() that fiddles with the umask while calling
1489fopen(). */
059ec3d9 1490
67d175de 1491(void)umask(0);
059ec3d9
PH
1492
1493/* Precompile the regular expression for matching a message id. Keep this in
1494step with the code that generates ids in the accept.c module. We need to do
1495this here, because the -M options check their arguments for syntactic validity
1496using mac_ismsgid, which uses this. */
1497
1498regex_ismsgid =
1499 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1500
a5bd321b 1501/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1502code, possibly extended, at the start of an error message. Note that the
1503terminating whitespace character is included. */
a5bd321b
PH
1504
1505regex_smtp_code =
1506 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1507 FALSE, TRUE);
1508
059ec3d9
PH
1509/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1510this seems to be a generally accepted convention, since one finds symbolic
1511links called "mailq" in standard OS configurations. */
1512
1513if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1514 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1515 {
1516 list_queue = TRUE;
1517 receiving_message = FALSE;
1518 called_as = US"-mailq";
1519 }
1520
1521/* If the program is called as "rmail" treat it as equivalent to
1522"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1523i.e. preventing a single dot on a line from terminating the message, and
1524returning with zero return code, even in cases of error (provided an error
1525message has been sent). */
1526
1527if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1528 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1529 {
1530 dot_ends = FALSE;
1531 called_as = US"-rmail";
1532 errors_sender_rc = EXIT_SUCCESS;
1533 }
1534
1535/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1536this is a smail convention. */
1537
1538if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1539 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1540 {
1541 smtp_input = smtp_batched_input = TRUE;
1542 called_as = US"-rsmtp";
1543 }
1544
1545/* If the program is called as "runq" treat it as equivalent to "exim -q";
1546this is a smail convention. */
1547
1548if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1549 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1550 {
1551 queue_interval = 0;
1552 receiving_message = FALSE;
1553 called_as = US"-runq";
1554 }
1555
1556/* If the program is called as "newaliases" treat it as equivalent to
1557"exim -bi"; this is a sendmail convention. */
1558
1559if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1560 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1561 {
1562 bi_option = TRUE;
1563 receiving_message = FALSE;
1564 called_as = US"-newaliases";
1565 }
1566
1567/* Save the original effective uid for a couple of uses later. It should
1568normally be root, but in some esoteric environments it may not be. */
1569
1570original_euid = geteuid();
1571
1572/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1573to be the same as the real ones. This makes a difference only if Exim is setuid
1574(or setgid) to something other than root, which could be the case in some
1575special configurations. */
1576
1577real_uid = getuid();
1578real_gid = getgid();
1579
1580if (real_uid == root_uid)
1581 {
1582 setgid(real_gid);
1583 setuid(real_uid);
1584 }
1585
1586/* If neither the original real uid nor the original euid was root, Exim is
1587running in an unprivileged state. */
1588
1589unprivileged = (real_uid != root_uid && original_euid != root_uid);
1590
1591/* If the first argument is --help, pretend there are no arguments. This will
1592cause a brief message to be given. */
1593
1594if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1595
1596/* Scan the program's arguments. Some can be dealt with right away; others are
1597simply recorded for checking and handling afterwards. Do a high-level switch
1598on the second character (the one after '-'), to save some effort. */
1599
1600for (i = 1; i < argc; i++)
1601 {
1602 BOOL badarg = FALSE;
1603 uschar *arg = argv[i];
1604 uschar *argrest;
1605 int switchchar;
1606
1607 /* An argument not starting with '-' is the start of a recipients list;
1608 break out of the options-scanning loop. */
1609
1610 if (arg[0] != '-')
1611 {
1612 recipients_arg = i;
1613 break;
1614 }
1615
1616 /* An option consistion of -- terminates the options */
1617
1618 if (Ustrcmp(arg, "--") == 0)
1619 {
1620 recipients_arg = i + 1;
1621 break;
1622 }
1623
1624 /* Handle flagged options */
1625
1626 switchchar = arg[1];
1627 argrest = arg+2;
1628
1629 /* Make all -ex options synonymous with -oex arguments, since that
1630 is assumed by various callers. Also make -qR options synonymous with -R
1631 options, as that seems to be required as well. Allow for -qqR too, and
1632 the same for -S options. */
1633
1634 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1635 Ustrncmp(arg+1, "qR", 2) == 0 ||
1636 Ustrncmp(arg+1, "qS", 2) == 0)
1637 {
1638 switchchar = arg[2];
1639 argrest++;
1640 }
1641 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1642 {
1643 switchchar = arg[3];
1644 argrest += 2;
1645 queue_2stage = TRUE;
1646 }
1647
1648 /* Make -r synonymous with -f, since it is a documented alias */
1649
1650 else if (arg[1] == 'r') switchchar = 'f';
1651
1652 /* Make -ov synonymous with -v */
1653
1654 else if (Ustrcmp(arg, "-ov") == 0)
1655 {
1656 switchchar = 'v';
1657 argrest++;
1658 }
1659
1660 /* High-level switch on active initial letter */
1661
1662 switch(switchchar)
1663 {
1664 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1665 so has no need of it. */
1666
1667 case 'B':
1668 if (*argrest == 0) i++; /* Skip over the type */
1669 break;
1670
1671
1672 case 'b':
1673 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1674
1675 /* -bd: Run in daemon mode, awaiting SMTP connections.
1676 -bdf: Ditto, but in the foreground.
1677 */
1678
1679 if (*argrest == 'd')
1680 {
1681 daemon_listen = TRUE;
1682 if (*(++argrest) == 'f') background_daemon = FALSE;
1683 else if (*argrest != 0) { badarg = TRUE; break; }
1684 }
1685
328895cc
PH
1686 /* -be: Run in expansion test mode
1687 -bem: Ditto, but read a message from a file first
1688 */
059ec3d9
PH
1689
1690 else if (*argrest == 'e')
328895cc 1691 {
059ec3d9 1692 expansion_test = checking = TRUE;
328895cc
PH
1693 if (argrest[1] == 'm')
1694 {
1695 if (++i >= argc) { badarg = TRUE; break; }
1696 expansion_test_message = argv[i];
1697 argrest++;
1698 }
1699 if (argrest[1] != 0) { badarg = TRUE; break; }
1700 }
059ec3d9 1701
f05da2e8
PH
1702 /* -bF: Run system filter test */
1703
1704 else if (*argrest == 'F')
1705 {
1706 filter_test |= FTEST_SYSTEM;
1707 if (*(++argrest) != 0) { badarg = TRUE; break; }
1708 if (++i < argc) filter_test_sfile = argv[i]; else
1709 {
1710 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1711 exit(EXIT_FAILURE);
1712 }
1713 }
1714
1715 /* -bf: Run user filter test
059ec3d9
PH
1716 -bfd: Set domain for filter testing
1717 -bfl: Set local part for filter testing
1718 -bfp: Set prefix for filter testing
1719 -bfs: Set suffix for filter testing
1720 */
1721
f05da2e8 1722 else if (*argrest == 'f')
059ec3d9 1723 {
f05da2e8 1724 if (*(++argrest) == 0)
059ec3d9 1725 {
f05da2e8
PH
1726 filter_test |= FTEST_USER;
1727 if (++i < argc) filter_test_ufile = argv[i]; else
059ec3d9
PH
1728 {
1729 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1730 exit(EXIT_FAILURE);
1731 }
1732 }
1733 else
1734 {
1735 if (++i >= argc)
1736 {
1737 fprintf(stderr, "exim: string expected after %s\n", arg);
1738 exit(EXIT_FAILURE);
1739 }
1740 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1741 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1742 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1743 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1744 else { badarg = TRUE; break; }
1745 }
1746 }
1747
1748 /* -bh: Host checking - an IP address must follow. */
1749
1750 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1751 {
1752 if (++i >= argc) { badarg = TRUE; break; }
1753 sender_host_address = argv[i];
1754 host_checking = checking = log_testing_mode = TRUE;
1755 host_checking_callout = argrest[1] == 'c';
1756 }
1757
1758 /* -bi: This option is used by sendmail to initialize *the* alias file,
1759 though it has the -oA option to specify a different file. Exim has no
1760 concept of *the* alias file, but since Sun's YP make script calls
1761 sendmail this way, some support must be provided. */
1762
1763 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1764
1765 /* -bm: Accept and deliver message - the default option. Reinstate
1766 receiving_message, which got turned off for all -b options. */
1767
1768 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1769
1770 /* -bnq: For locally originating messages, do not qualify unqualified
1771 addresses. In the envelope, this causes errors; in header lines they
1772 just get left. */
1773
1774 else if (Ustrcmp(argrest, "nq") == 0)
1775 {
1776 allow_unqualified_sender = FALSE;
1777 allow_unqualified_recipient = FALSE;
1778 }
1779
1780 /* -bpxx: List the contents of the mail queue, in various forms. If
1781 the option is -bpc, just a queue count is needed. Otherwise, if the
1782 first letter after p is r, then order is random. */
1783
1784 else if (*argrest == 'p')
1785 {
1786 if (*(++argrest) == 'c')
1787 {
1788 count_queue = TRUE;
1789 if (*(++argrest) != 0) badarg = TRUE;
1790 break;
1791 }
1792
1793 if (*argrest == 'r')
1794 {
1795 list_queue_option = 8;
1796 argrest++;
1797 }
1798 else list_queue_option = 0;
1799
1800 list_queue = TRUE;
1801
1802 /* -bp: List the contents of the mail queue, top-level only */
1803
1804 if (*argrest == 0) {}
1805
1806 /* -bpu: List the contents of the mail queue, top-level undelivered */
1807
1808 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1809
1810 /* -bpa: List the contents of the mail queue, including all delivered */
1811
1812 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1813
1814 /* Unknown after -bp[r] */
1815
1816 else
1817 {
1818 badarg = TRUE;
1819 break;
1820 }
1821 }
1822
1823
1824 /* -bP: List the configuration variables given as the address list.
1825 Force -v, so configuration errors get displayed. */
1826
1827 else if (Ustrcmp(argrest, "P") == 0)
1828 {
1829 list_options = TRUE;
1830 debug_selector |= D_v;
1831 debug_file = stderr;
1832 }
1833
1834 /* -brt: Test retry configuration lookup */
1835
1836 else if (Ustrcmp(argrest, "rt") == 0)
1837 {
1838 test_retry_arg = i + 1;
1839 goto END_ARG;
1840 }
1841
1842 /* -brw: Test rewrite configuration */
1843
1844 else if (Ustrcmp(argrest, "rw") == 0)
1845 {
1846 test_rewrite_arg = i + 1;
1847 goto END_ARG;
1848 }
1849
1850 /* -bS: Read SMTP commands on standard input, but produce no replies -
1851 all errors are reported by sending messages. */
1852
1853 else if (Ustrcmp(argrest, "S") == 0)
1854 smtp_input = smtp_batched_input = receiving_message = TRUE;
1855
1856 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1857 on standard output. */
1858
1859 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1860
1861 /* -bt: address testing mode */
1862
1863 else if (Ustrcmp(argrest, "t") == 0)
1864 address_test_mode = checking = log_testing_mode = TRUE;
1865
1866 /* -bv: verify addresses */
1867
1868 else if (Ustrcmp(argrest, "v") == 0)
1869 verify_address_mode = checking = log_testing_mode = TRUE;
1870
1871 /* -bvs: verify sender addresses */
1872
1873 else if (Ustrcmp(argrest, "vs") == 0)
1874 {
1875 verify_address_mode = checking = log_testing_mode = TRUE;
1876 verify_as_sender = TRUE;
1877 }
1878
1879 /* -bV: Print version string and support details */
1880
1881 else if (Ustrcmp(argrest, "V") == 0)
1882 {
1883 printf("Exim version %s #%s built %s\n", version_string,
1884 version_cnumber, version_date);
1885 printf("%s\n", CS version_copyright);
1886 version_printed = TRUE;
1887 show_whats_supported(stdout);
1888 }
1889
1890 else badarg = TRUE;
1891 break;
1892
1893
1894 /* -C: change configuration file list; ignore if it isn't really
1895 a change! Enforce a prefix check if required. */
1896
1897 case 'C':
1898 if (*argrest == 0)
1899 {
1900 if(++i < argc) argrest = argv[i]; else
1901 { badarg = TRUE; break; }
1902 }
1903 if (Ustrcmp(config_main_filelist, argrest) != 0)
1904 {
1905 #ifdef ALT_CONFIG_PREFIX
1906 int sep = 0;
1907 int len = Ustrlen(ALT_CONFIG_PREFIX);
1908 uschar *list = argrest;
1909 uschar *filename;
1910 while((filename = string_nextinlist(&list, &sep, big_buffer,
1911 big_buffer_size)) != NULL)
1912 {
1913 if ((Ustrlen(filename) < len ||
1914 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1915 Ustrstr(filename, "/../") != NULL) &&
1916 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1917 {
1918 fprintf(stderr, "-C Permission denied\n");
1919 exit(EXIT_FAILURE);
1920 }
1921 }
1922 #endif
1923
1924 config_main_filelist = argrest;
1925 config_changed = TRUE;
1926 }
1927 break;
1928
1929
1930 /* -D: set up a macro definition */
1931
1932 case 'D':
1933 #ifdef DISABLE_D_OPTION
1934 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1935 exit(EXIT_FAILURE);
1936 #else
1937 {
1938 int ptr = 0;
1939 macro_item *mlast = NULL;
1940 macro_item *m;
1941 uschar name[24];
1942 uschar *s = argrest;
1943
1944 while (isspace(*s)) s++;
1945
1946 if (*s < 'A' || *s > 'Z')
1947 {
1948 fprintf(stderr, "exim: macro name set by -D must start with "
1949 "an upper case letter\n");
1950 exit(EXIT_FAILURE);
1951 }
1952
1953 while (isalnum(*s) || *s == '_')
1954 {
1955 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1956 s++;
1957 }
1958 name[ptr] = 0;
1959 if (ptr == 0) { badarg = TRUE; break; }
1960 while (isspace(*s)) s++;
1961 if (*s != 0)
1962 {
1963 if (*s++ != '=') { badarg = TRUE; break; }
1964 while (isspace(*s)) s++;
1965 }
1966
1967 for (m = macros; m != NULL; m = m->next)
1968 {
1969 if (Ustrcmp(m->name, name) == 0)
1970 {
1971 fprintf(stderr, "exim: duplicated -D in command line\n");
1972 exit(EXIT_FAILURE);
1973 }
1974 mlast = m;
1975 }
1976
1977 m = store_get(sizeof(macro_item) + Ustrlen(name));
1978 m->next = NULL;
1979 m->command_line = TRUE;
1980 if (mlast == NULL) macros = m; else mlast->next = m;
1981 Ustrcpy(m->name, name);
1982 m->replacement = string_copy(s);
1983
1984 if (clmacro_count >= MAX_CLMACROS)
1985 {
1986 fprintf(stderr, "exim: too many -D options on command line\n");
1987 exit(EXIT_FAILURE);
1988 }
1989 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1990 m->replacement);
1991 }
1992 #endif
1993 break;
1994
1995 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 1996 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 1997 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
1998
1999 case 'd':
2000 if (Ustrcmp(argrest, "ropcr") == 0)
2001 {
2002 /* drop_cr = TRUE; */
2003 }
2004
2005 /* Use an intermediate variable so that we don't set debugging while
2006 decoding the debugging bits. */
2007
2008 else
2009 {
2010 unsigned int selector = D_default;
2011 debug_selector = 0;
2012 debug_file = NULL;
3d235903
PH
2013 if (*argrest == 'd')
2014 {
2015 debug_daemon = TRUE;
2016 argrest++;
2017 }
059ec3d9 2018 if (*argrest != 0)
1fe64dcc 2019 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
059ec3d9
PH
2020 debug_options_count, US"debug");
2021 debug_selector = selector;
2022 }
2023 break;
2024
2025
2026 /* -E: This is a local error message. This option is not intended for
2027 external use at all, but is not restricted to trusted callers because it
2028 does no harm (just suppresses certain error messages) and if Exim is run
2029 not setuid root it won't always be trusted when it generates error
2030 messages using this option. If there is a message id following -E, point
2031 message_reference at it, for logging. */
2032
2033 case 'E':
2034 local_error_message = TRUE;
2035 if (mac_ismsgid(argrest)) message_reference = argrest;
2036 break;
2037
2038
2039 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2040 option, so it looks as if historically the -oex options are also callable
2041 without the leading -o. So we have to accept them. Before the switch,
2042 anything starting -oe has been converted to -e. Exim does not support all
2043 of the sendmail error options. */
2044
2045 case 'e':
2046 if (Ustrcmp(argrest, "e") == 0)
2047 {
2048 arg_error_handling = ERRORS_SENDER;
2049 errors_sender_rc = EXIT_SUCCESS;
2050 }
2051 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2052 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2053 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2054 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2055 else badarg = TRUE;
2056 break;
2057
2058
2059 /* -F: Set sender's full name, used instead of the gecos entry from
2060 the password file. Since users can usually alter their gecos entries,
2061 there's no security involved in using this instead. The data can follow
2062 the -F or be in the next argument. */
2063
2064 case 'F':
2065 if (*argrest == 0)
2066 {
2067 if(++i < argc) argrest = argv[i]; else
2068 { badarg = TRUE; break; }
2069 }
2070 originator_name = argrest;
2fe1a124 2071 sender_name_forced = TRUE;
059ec3d9
PH
2072 break;
2073
2074
2075 /* -f: Set sender's address - this value is only actually used if Exim is
2076 run by a trusted user, or if untrusted_set_sender is set and matches the
2077 address, except that the null address can always be set by any user. The
2078 test for this happens later, when the value given here is ignored when not
2079 permitted. For an untrusted user, the actual sender is still put in Sender:
2080 if it doesn't match the From: header (unless no_local_from_check is set).
2081 The data can follow the -f or be in the next argument. The -r switch is an
2082 obsolete form of -f but since there appear to be programs out there that
2083 use anything that sendmail has ever supported, better accept it - the
2084 synonymizing is done before the switch above.
2085
2086 At this stage, we must allow domain literal addresses, because we don't
2087 know what the setting of allow_domain_literals is yet. Ditto for trailing
2088 dots and strip_trailing_dot. */
2089
2090 case 'f':
2091 {
2092 int start, end;
2093 uschar *errmess;
2094 if (*argrest == 0)
2095 {
2096 if (i+1 < argc) argrest = argv[++i]; else
2097 { badarg = TRUE; break; }
2098 }
2099 if (*argrest == 0)
2100 {
2101 sender_address = string_sprintf(""); /* Ensure writeable memory */
2102 }
2103 else
2104 {
2105 uschar *temp = argrest + Ustrlen(argrest) - 1;
2106 while (temp >= argrest && isspace(*temp)) temp--;
2107 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2108 allow_domain_literals = TRUE;
2109 strip_trailing_dot = TRUE;
2110 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2111 &sender_address_domain, TRUE);
2112 allow_domain_literals = FALSE;
2113 strip_trailing_dot = FALSE;
2114 if (sender_address == NULL)
2115 {
2116 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2117 return EXIT_FAILURE;
2118 }
2119 }
2120 sender_address_forced = TRUE;
2121 }
2122 break;
2123
2124 /* This is some Sendmail thing which can be ignored */
2125
2126 case 'G':
2127 break;
2128
2129 /* -h: Set the hop count for an incoming message. Exim does not currently
2130 support this; it always computes it by counting the Received: headers.
2131 To put it in will require a change to the spool header file format. */
2132
2133 case 'h':
2134 if (*argrest == 0)
2135 {
2136 if(++i < argc) argrest = argv[i]; else
2137 { badarg = TRUE; break; }
2138 }
2139 if (!isdigit(*argrest)) badarg = TRUE;
2140 break;
2141
2142
2143 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2144 not to be documented for sendmail but mailx (at least) uses it) */
2145
2146 case 'i':
2147 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2148 break;
2149
2150
2151 case 'M':
2152 receiving_message = FALSE;
2153
2154 /* -MC: continue delivery of another message via an existing open
2155 file descriptor. This option is used for an internal call by the
2156 smtp transport when there is a pending message waiting to go to an
2157 address to which it has got a connection. Five subsequent arguments are
2158 required: transport name, host name, IP address, sequence number, and
2159 message_id. Transports may decline to create new processes if the sequence
2160 number gets too big. The channel is stdin. This (-MC) must be the last
2161 argument. There's a subsequent check that the real-uid is privileged.
2162
2163 If we are running in the test harness. delay for a bit, to let the process
2164 that set this one up complete. This makes for repeatability of the logging,
2165 etc. output. */
2166
2167 if (Ustrcmp(argrest, "C") == 0)
2168 {
41c7c167
PH
2169 union sockaddr_46 interface_sock;
2170 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2171
059ec3d9
PH
2172 if (argc != i + 6)
2173 {
2174 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2175 return EXIT_FAILURE;
2176 }
2177
2178 if (msg_action_arg >= 0)
2179 {
2180 fprintf(stderr, "exim: incompatible arguments\n");
2181 return EXIT_FAILURE;
2182 }
2183
2184 continue_transport = argv[++i];
2185 continue_hostname = argv[++i];
2186 continue_host_address = argv[++i];
2187 continue_sequence = Uatoi(argv[++i]);
2188 msg_action = MSG_DELIVER;
2189 msg_action_arg = ++i;
2190 forced_delivery = TRUE;
2191 queue_run_pid = passed_qr_pid;
2192 queue_run_pipe = passed_qr_pipe;
2193
2194 if (!mac_ismsgid(argv[i]))
2195 {
2196 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2197 argv[i]);
2198 return EXIT_FAILURE;
2199 }
2200
41c7c167
PH
2201 /* Set up $sending_ip_address and $sending_port */
2202
2203 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2204 &size) == 0)
2205 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2206 &sending_port);
2207 else
2208 {
2209 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2210 strerror(errno));
2211 return EXIT_FAILURE;
2212 }
2213
059ec3d9
PH
2214 if (running_in_test_harness) millisleep(500);
2215 break;
2216 }
2217
2218 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2219 precedes -MC (see above). The flag indicates that the host to which
2220 Exim is connected has accepted an AUTH sequence. */
2221
2222 else if (Ustrcmp(argrest, "CA") == 0)
2223 {
2224 smtp_authenticated = TRUE;
2225 break;
2226 }
2227
2228 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2229 it preceded -MC (see above) */
2230
2231 else if (Ustrcmp(argrest, "CP") == 0)
2232 {
2233 smtp_use_pipelining = TRUE;
2234 break;
2235 }
2236
2237 /* -MCQ: pass on the pid of the queue-running process that started
2238 this chain of deliveries and the fd of its synchronizing pipe; this
2239 is useful only when it precedes -MC (see above) */
2240
2241 else if (Ustrcmp(argrest, "CQ") == 0)
2242 {
2243 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2244 else badarg = TRUE;
2245 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2246 else badarg = TRUE;
2247 break;
2248 }
2249
2250 /* -MCS: set the smtp_use_size flag; this is useful only when it
2251 precedes -MC (see above) */
2252
2253 else if (Ustrcmp(argrest, "CS") == 0)
2254 {
2255 smtp_use_size = TRUE;
2256 break;
2257 }
2258
2259 /* -MCT: set the tls_offered flag; this is useful only when it
2260 precedes -MC (see above). The flag indicates that the host to which
2261 Exim is connected has offered TLS support. */
2262
2263 #ifdef SUPPORT_TLS
2264 else if (Ustrcmp(argrest, "CT") == 0)
2265 {
2266 tls_offered = TRUE;
2267 break;
2268 }
2269 #endif
2270
2271 /* -M[x]: various operations on the following list of message ids:
2272 -M deliver the messages, ignoring next retry times and thawing
2273 -Mc deliver the messages, checking next retry times, no thawing
2274 -Mf freeze the messages
2275 -Mg give up on the messages
2276 -Mt thaw the messages
2277 -Mrm remove the messages
2278 In the above cases, this must be the last option. There are also the
2279 following options which are followed by a single message id, and which
2280 act on that message. Some of them use the "recipient" addresses as well.
2281 -Mar add recipient(s)
2282 -Mmad mark all recipients delivered
2283 -Mmd mark recipients(s) delivered
2284 -Mes edit sender
0ef732d9 2285 -Mset load a message for use with -be
059ec3d9 2286 -Mvb show body
a96603a0 2287 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2288 -Mvh show header
2289 -Mvl show log
2290 */
2291
2292 else if (*argrest == 0)
2293 {
2294 msg_action = MSG_DELIVER;
2295 forced_delivery = deliver_force_thaw = TRUE;
2296 }
2297 else if (Ustrcmp(argrest, "ar") == 0)
2298 {
2299 msg_action = MSG_ADD_RECIPIENT;
2300 one_msg_action = TRUE;
2301 }
2302 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2303 else if (Ustrcmp(argrest, "es") == 0)
2304 {
2305 msg_action = MSG_EDIT_SENDER;
2306 one_msg_action = TRUE;
2307 }
2308 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2309 else if (Ustrcmp(argrest, "g") == 0)
2310 {
2311 msg_action = MSG_DELIVER;
2312 deliver_give_up = TRUE;
2313 }
2314 else if (Ustrcmp(argrest, "mad") == 0)
2315 {
2316 msg_action = MSG_MARK_ALL_DELIVERED;
2317 }
2318 else if (Ustrcmp(argrest, "md") == 0)
2319 {
2320 msg_action = MSG_MARK_DELIVERED;
2321 one_msg_action = TRUE;
2322 }
2323 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2324 else if (Ustrcmp(argrest, "set") == 0)
2325 {
2326 msg_action = MSG_LOAD;
2327 one_msg_action = TRUE;
2328 }
059ec3d9
PH
2329 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2330 else if (Ustrcmp(argrest, "vb") == 0)
2331 {
2332 msg_action = MSG_SHOW_BODY;
2333 one_msg_action = TRUE;
2334 }
a96603a0
PH
2335 else if (Ustrcmp(argrest, "vc") == 0)
2336 {
2337 msg_action = MSG_SHOW_COPY;
2338 one_msg_action = TRUE;
2339 }
059ec3d9
PH
2340 else if (Ustrcmp(argrest, "vh") == 0)
2341 {
2342 msg_action = MSG_SHOW_HEADER;
2343 one_msg_action = TRUE;
2344 }
2345 else if (Ustrcmp(argrest, "vl") == 0)
2346 {
2347 msg_action = MSG_SHOW_LOG;
2348 one_msg_action = TRUE;
2349 }
2350 else { badarg = TRUE; break; }
2351
2352 /* All the -Mxx options require at least one message id. */
2353
2354 msg_action_arg = i + 1;
2355 if (msg_action_arg >= argc)
2356 {
2357 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2358 return EXIT_FAILURE;
2359 }
2360
2361 /* Some require only message ids to follow */
2362
2363 if (!one_msg_action)
2364 {
2365 int j;
2366 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2367 {
2368 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2369 argv[j], arg);
2370 return EXIT_FAILURE;
2371 }
2372 goto END_ARG; /* Remaining args are ids */
2373 }
2374
2375 /* Others require only one message id, possibly followed by addresses,
2376 which will be handled as normal arguments. */
2377
2378 else
2379 {
2380 if (!mac_ismsgid(argv[msg_action_arg]))
2381 {
2382 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2383 argv[msg_action_arg], arg);
2384 return EXIT_FAILURE;
2385 }
2386 i++;
2387 }
2388 break;
2389
2390
2391 /* Some programs seem to call the -om option without the leading o;
2392 for sendmail it askes for "me too". Exim always does this. */
2393
2394 case 'm':
2395 if (*argrest != 0) badarg = TRUE;
2396 break;
2397
2398
2399 /* -N: don't do delivery - a debugging option that stops transports doing
2400 their thing. It implies debugging at the D_v level. */
2401
2402 case 'N':
2403 if (*argrest == 0)
2404 {
2405 dont_deliver = TRUE;
2406 debug_selector |= D_v;
2407 debug_file = stderr;
2408 }
2409 else badarg = TRUE;
2410 break;
2411
2412
2413 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2414 it. */
2415
2416 case 'n':
2417 break;
2418
2419 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2420 option to the specified value. This form uses long names. We need to handle
2421 -O option=value and -Ooption=value. */
2422
2423 case 'O':
2424 if (*argrest == 0)
2425 {
2426 if (++i >= argc)
2427 {
2428 fprintf(stderr, "exim: string expected after -O\n");
2429 exit(EXIT_FAILURE);
2430 }
2431 }
2432 break;
2433
2434 case 'o':
2435
2436 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2437 file" option). */
2438
2439 if (*argrest == 'A')
2440 {
2441 alias_arg = argrest + 1;
2442 if (alias_arg[0] == 0)
2443 {
2444 if (i+1 < argc) alias_arg = argv[++i]; else
2445 {
2446 fprintf(stderr, "exim: string expected after -oA\n");
2447 exit(EXIT_FAILURE);
2448 }
2449 }
2450 }
2451
2452 /* -oB: Set a connection message max value for remote deliveries */
2453
2454 else if (*argrest == 'B')
2455 {
2456 uschar *p = argrest + 1;
2457 if (p[0] == 0)
2458 {
2459 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2460 {
2461 connection_max_messages = 1;
2462 p = NULL;
2463 }
2464 }
2465
2466 if (p != NULL)
2467 {
2468 if (!isdigit(*p))
2469 {
2470 fprintf(stderr, "exim: number expected after -oB\n");
2471 exit(EXIT_FAILURE);
2472 }
2473 connection_max_messages = Uatoi(p);
2474 }
2475 }
2476
2477 /* -odb: background delivery */
2478
2479 else if (Ustrcmp(argrest, "db") == 0)
2480 {
2481 synchronous_delivery = FALSE;
2482 arg_queue_only = FALSE;
2483 queue_only_set = TRUE;
2484 }
2485
2486 /* -odf: foreground delivery (smail-compatible option); same effect as
2487 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2488 */
2489
2490 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2491 {
2492 synchronous_delivery = TRUE;
2493 arg_queue_only = FALSE;
2494 queue_only_set = TRUE;
2495 }
2496
2497 /* -odq: queue only */
2498
2499 else if (Ustrcmp(argrest, "dq") == 0)
2500 {
2501 synchronous_delivery = FALSE;
2502 arg_queue_only = TRUE;
2503 queue_only_set = TRUE;
2504 }
2505
2506 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2507 but no remote delivery */
2508
2509 else if (Ustrcmp(argrest, "dqs") == 0)
2510 {
2511 queue_smtp = TRUE;
2512 arg_queue_only = FALSE;
2513 queue_only_set = TRUE;
2514 }
2515
2516 /* -oex: Sendmail error flags. As these are also accepted without the
2517 leading -o prefix, for compatibility with vacation and other callers,
2518 they are handled with -e above. */
2519
2520 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2521 -oitrue: Another sendmail syntax for the same */
2522
2523 else if (Ustrcmp(argrest, "i") == 0 ||
2524 Ustrcmp(argrest, "itrue") == 0)
2525 dot_ends = FALSE;
2526
2527 /* -oM*: Set various characteristics for an incoming message; actually
2528 acted on for trusted callers only. */
2529
2530 else if (*argrest == 'M')
2531 {
2532 if (i+1 >= argc)
2533 {
2534 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2535 exit(EXIT_FAILURE);
2536 }
2537
2538 /* -oMa: Set sender host address */
2539
2540 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2541
2542 /* -oMaa: Set authenticator name */
2543
2544 else if (Ustrcmp(argrest, "Maa") == 0)
2545 sender_host_authenticated = argv[++i];
2546
2547 /* -oMas: setting authenticated sender */
2548
2549 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2550
2551 /* -oMai: setting authenticated id */
2552
2553 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2554
2555 /* -oMi: Set incoming interface address */
2556
2557 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2558
2559 /* -oMr: Received protocol */
2560
2561 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2562
2563 /* -oMs: Set sender host name */
2564
2565 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2566
2567 /* -oMt: Set sender ident */
2568
33d73e3b
PH
2569 else if (Ustrcmp(argrest, "Mt") == 0)
2570 {
2571 sender_ident_set = TRUE;
2572 sender_ident = argv[++i];
2573 }
059ec3d9
PH
2574
2575 /* Else a bad argument */
2576
2577 else
2578 {
2579 badarg = TRUE;
2580 break;
2581 }
2582 }
2583
2584 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2585 seem to call this as -m (undocumented), so that is also accepted (see
2586 above). */
2587
2588 else if (Ustrcmp(argrest, "m") == 0) {}
2589
2590 /* -oo: An ancient flag for old-style addresses which still seems to
2591 crop up in some calls (see in SCO). */
2592
2593 else if (Ustrcmp(argrest, "o") == 0) {}
2594
2595 /* -oP <name>: set pid file path for daemon */
2596
2597 else if (Ustrcmp(argrest, "P") == 0)
2598 override_pid_file_path = argv[++i];
2599
2600 /* -or <n>: set timeout for non-SMTP acceptance
2601 -os <n>: set timeout for SMTP acceptance */
2602
2603 else if (*argrest == 'r' || *argrest == 's')
2604 {
2605 int *tp = (*argrest == 'r')?
2606 &arg_receive_timeout : &arg_smtp_receive_timeout;
2607 if (argrest[1] == 0)
2608 {
2609 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2610 }
2611 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2612 if (*tp < 0)
2613 {
2614 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2615 exit(EXIT_FAILURE);
2616 }
2617 }
2618
2619 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2620
2621 else if (Ustrcmp(argrest, "X") == 0)
2622 override_local_interfaces = argv[++i];
2623
2624 /* Unknown -o argument */
2625
2626 else badarg = TRUE;
2627 break;
2628
2629
2630 /* -ps: force Perl startup; -pd force delayed Perl startup */
2631
2632 case 'p':
2633 #ifdef EXIM_PERL
2634 if (*argrest == 's' && argrest[1] == 0)
2635 {
2636 perl_start_option = 1;
2637 break;
2638 }
2639 if (*argrest == 'd' && argrest[1] == 0)
2640 {
2641 perl_start_option = -1;
2642 break;
2643 }
2644 #endif
2645
2646 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2647 which sets the host protocol and host name */
2648
2649 if (*argrest == 0)
2650 {
2651 if (i+1 < argc) argrest = argv[++i]; else
2652 { badarg = TRUE; break; }
2653 }
2654
2655 if (*argrest != 0)
2656 {
2657 uschar *hn = Ustrchr(argrest, ':');
2658 if (hn == NULL)
2659 {
2660 received_protocol = argrest;
2661 }
2662 else
2663 {
2664 received_protocol = string_copyn(argrest, hn - argrest);
2665 sender_host_name = hn + 1;
2666 }
2667 }
2668 break;
2669
2670
2671 case 'q':
2672 receiving_message = FALSE;
3cc66b45
PH
2673 if (queue_interval >= 0)
2674 {
2675 fprintf(stderr, "exim: -q specified more than once\n");
2676 exit(EXIT_FAILURE);
2677 }
059ec3d9
PH
2678
2679 /* -qq...: Do queue runs in a 2-stage manner */
2680
2681 if (*argrest == 'q')
2682 {
2683 queue_2stage = TRUE;
2684 argrest++;
2685 }
2686
2687 /* -qi...: Do only first (initial) deliveries */
2688
2689 if (*argrest == 'i')
2690 {
2691 queue_run_first_delivery = TRUE;
2692 argrest++;
2693 }
2694
2695 /* -qf...: Run the queue, forcing deliveries
2696 -qff..: Ditto, forcing thawing as well */
2697
2698 if (*argrest == 'f')
2699 {
2700 queue_run_force = TRUE;
2701 if (*(++argrest) == 'f')
2702 {
2703 deliver_force_thaw = TRUE;
2704 argrest++;
2705 }
2706 }
2707
2708 /* -q[f][f]l...: Run the queue only on local deliveries */
2709
2710 if (*argrest == 'l')
2711 {
2712 queue_run_local = TRUE;
2713 argrest++;
2714 }
2715
2716 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2717 optionally starting from a given message id. */
2718
2719 if (*argrest == 0 &&
2720 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2721 {
2722 queue_interval = 0;
2723 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2724 start_queue_run_id = argv[++i];
2725 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2726 stop_queue_run_id = argv[++i];
2727 }
2728
2729 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2730 optionally local only. */
2731
2732 else
2733 {
2734 if (*argrest != 0)
2735 queue_interval = readconf_readtime(argrest, 0, FALSE);
2736 else
2737 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2738 if (queue_interval <= 0)
2739 {
2740 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2741 exit(EXIT_FAILURE);
2742 }
2743 }
2744 break;
2745
2746
2747 case 'R': /* Synonymous with -qR... */
2748 receiving_message = FALSE;
2749
2750 /* -Rf: As -R (below) but force all deliveries,
2751 -Rff: Ditto, but also thaw all frozen messages,
2752 -Rr: String is regex
2753 -Rrf: Regex and force
2754 -Rrff: Regex and force and thaw
2755
2756 in all cases provided there are no further characters in this
2757 argument. */
2758
2759 if (*argrest != 0)
2760 {
2761 int i;
2762 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2763 {
2764 if (Ustrcmp(argrest, rsopts[i]) == 0)
2765 {
2766 if (i != 2) queue_run_force = TRUE;
2767 if (i >= 2) deliver_selectstring_regex = TRUE;
2768 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2769 argrest += Ustrlen(rsopts[i]);
2770 }
2771 }
2772 }
2773
2774 /* -R: Set string to match in addresses for forced queue run to
2775 pick out particular messages. */
2776
2777 if (*argrest == 0)
2778 {
2779 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2780 {
2781 fprintf(stderr, "exim: string expected after -R\n");
2782 exit(EXIT_FAILURE);
2783 }
2784 }
2785 else deliver_selectstring = argrest;
059ec3d9
PH
2786 break;
2787
2788
2789 /* -r: an obsolete synonym for -f (see above) */
2790
2791
2792 /* -S: Like -R but works on sender. */
2793
2794 case 'S': /* Synonymous with -qS... */
2795 receiving_message = FALSE;
2796
2797 /* -Sf: As -S (below) but force all deliveries,
2798 -Sff: Ditto, but also thaw all frozen messages,
2799 -Sr: String is regex
2800 -Srf: Regex and force
2801 -Srff: Regex and force and thaw
2802
2803 in all cases provided there are no further characters in this
2804 argument. */
2805
2806 if (*argrest != 0)
2807 {
2808 int i;
2809 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2810 {
2811 if (Ustrcmp(argrest, rsopts[i]) == 0)
2812 {
2813 if (i != 2) queue_run_force = TRUE;
2814 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2815 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2816 argrest += Ustrlen(rsopts[i]);
2817 }
2818 }
2819 }
2820
2821 /* -S: Set string to match in addresses for forced queue run to
2822 pick out particular messages. */
2823
2824 if (*argrest == 0)
2825 {
2826 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2827 {
2828 fprintf(stderr, "exim: string expected after -S\n");
2829 exit(EXIT_FAILURE);
2830 }
2831 }
2832 else deliver_selectstring_sender = argrest;
059ec3d9
PH
2833 break;
2834
2835 /* -Tqt is an option that is exclusively for use by the testing suite.
2836 It is not recognized in other circumstances. It allows for the setting up
2837 of explicit "queue times" so that various warning/retry things can be
2838 tested. Otherwise variability of clock ticks etc. cause problems. */
2839
2840 case 'T':
2841 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2842 fudged_queue_times = argv[++i];
2843 else badarg = TRUE;
2844 break;
2845
2846
2847 /* -t: Set flag to extract recipients from body of message. */
2848
2849 case 't':
2850 if (*argrest == 0) extract_recipients = TRUE;
2851
2852 /* -ti: Set flag to extract recipients from body of message, and also
2853 specify that dot does not end the message. */
2854
2855 else if (Ustrcmp(argrest, "i") == 0)
2856 {
2857 extract_recipients = TRUE;
2858 dot_ends = FALSE;
2859 }
2860
2861 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2862
2863 #ifdef SUPPORT_TLS
2864 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2865 #endif
2866
2867 else badarg = TRUE;
2868 break;
2869
2870
2871 /* -U: This means "initial user submission" in sendmail, apparently. The
2872 doc claims that in future sendmail may refuse syntactically invalid
2873 messages instead of fixing them. For the moment, we just ignore it. */
2874
2875 case 'U':
2876 break;
2877
2878
2879 /* -v: verify things - this is a very low-level debugging */
2880
2881 case 'v':
2882 if (*argrest == 0)
2883 {
2884 debug_selector |= D_v;
2885 debug_file = stderr;
2886 }
2887 else badarg = TRUE;
2888 break;
2889
2890
2891 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2892
2893 The -x flag tells the sendmail command that mail from a local
2894 mail program has National Language Support (NLS) extended characters
2895 in the body of the mail item. The sendmail command can send mail with
2896 extended NLS characters across networks that normally corrupts these
2897 8-bit characters.
2898
2899 As Exim is 8-bit clean, it just ignores this flag. */
2900
2901 case 'x':
2902 if (*argrest != 0) badarg = TRUE;
2903 break;
2904
2905 /* All other initial characters are errors */
2906
2907 default:
2908 badarg = TRUE;
2909 break;
2910 } /* End of high-level switch statement */
2911
2912 /* Failed to recognize the option, or syntax error */
2913
2914 if (badarg)
2915 {
2916 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2917 "option %s\n", arg);
2918 exit(EXIT_FAILURE);
2919 }
2920 }
2921
2922
3cc66b45
PH
2923/* If -R or -S have been specified without -q, assume a single queue run. */
2924
2925if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2926 queue_interval < 0) queue_interval = 0;
2927
2928
059ec3d9
PH
2929/* Arguments have been processed. Check for incompatibilities. */
2930
2931END_ARG:
2932if ((
2933 (smtp_input || extract_recipients || recipients_arg < argc) &&
2934 (daemon_listen || queue_interval >= 0 || bi_option ||
2935 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 2936 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
2937 ) ||
2938 (
2939 msg_action_arg > 0 &&
0ef732d9
PH
2940 (daemon_listen || queue_interval >= 0 || list_options ||
2941 (checking && msg_action != MSG_LOAD) ||
2942 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
2943 ) ||
2944 (
2945 (daemon_listen || queue_interval >= 0) &&
2946 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 2947 bi_option)
059ec3d9
PH
2948 ) ||
2949 (
2950 daemon_listen && queue_interval == 0
2951 ) ||
2952 (
2953 list_options &&
2954 (checking || smtp_input || extract_recipients ||
f05da2e8 2955 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2956 ) ||
2957 (
2958 verify_address_mode &&
2959 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 2960 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2961 ) ||
2962 (
2963 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 2964 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2965 ) ||
2966 (
f05da2e8 2967 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
2968 extract_recipients)
2969 ) ||
2970 (
2971 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
2972 ) ||
2973 (
2974 msg_action == MSG_LOAD &&
2975 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
2976 )
2977 )
2978 {
2979 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2980 exit(EXIT_FAILURE);
2981 }
2982
2983/* If debugging is set up, set the file and the file descriptor to pass on to
2984child processes. It should, of course, be 2 for stderr. Also, force the daemon
2985to run in the foreground. */
2986
2987if (debug_selector != 0)
2988 {
2989 debug_file = stderr;
2990 debug_fd = fileno(debug_file);
2991 background_daemon = FALSE;
2992 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2993 if (debug_selector != D_v) /* -v only doesn't show this */
2994 {
2995 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2996 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2997 debug_selector);
2998 show_whats_supported(stderr);
2999 }
3000 }
3001
3002/* When started with root privilege, ensure that the limits on the number of
3003open files and the number of processes (where that is accessible) are
3004sufficiently large, or are unset, in case Exim has been called from an
3005environment where the limits are screwed down. Not all OS have the ability to
3006change some of these limits. */
3007
3008if (unprivileged)
3009 {
3010 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3011 }
3012else
3013 {
3014 struct rlimit rlp;
3015
3016 #ifdef RLIMIT_NOFILE
3017 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3018 {
3019 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3020 strerror(errno));
3021 rlp.rlim_cur = rlp.rlim_max = 0;
3022 }
eb2c0248
PH
3023
3024 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3025 be exceeded. It turns out that some older OS have a fixed upper limit of
3026 256. */
eb2c0248 3027
059ec3d9
PH
3028 if (rlp.rlim_cur < 1000)
3029 {
3030 rlp.rlim_cur = rlp.rlim_max = 1000;
3031 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3032 {
a494b1e1
PH
3033 rlp.rlim_cur = rlp.rlim_max = 256;
3034 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3035 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3036 strerror(errno));
eb2c0248 3037 }
059ec3d9
PH
3038 }
3039 #endif
3040
3041 #ifdef RLIMIT_NPROC
3042 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3043 {
3044 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3045 strerror(errno));
3046 rlp.rlim_cur = rlp.rlim_max = 0;
3047 }
3048
3049 #ifdef RLIM_INFINITY
3050 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3051 {
3052 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3053 #else
3054 if (rlp.rlim_cur < 1000)
3055 {
3056 rlp.rlim_cur = rlp.rlim_max = 1000;
3057 #endif
3058 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3059 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3060 strerror(errno));
3061 }
3062 #endif
3063 }
3064
3065/* Exim is normally entered as root (but some special configurations are
3066possible that don't do this). However, it always spins off sub-processes that
3067set their uid and gid as required for local delivery. We don't want to pass on
3068any extra groups that root may belong to, so we want to get rid of them all at
3069this point.
3070
3071We need to obey setgroups() at this stage, before possibly giving up root
3072privilege for a changed configuration file, but later on we might need to
3073check on the additional groups for the admin user privilege - can't do that
3074till after reading the config, which might specify the exim gid. Therefore,
3075save the group list here first. */
3076
3077group_count = getgroups(NGROUPS_MAX, group_list);
3078
3079/* There is a fundamental difference in some BSD systems in the matter of
3080groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3081known not to be different. On the "different" systems there is a single group
3082list, and the first entry in it is the current group. On all other versions of
3083Unix there is a supplementary group list, which is in *addition* to the current
3084group. Consequently, to get rid of all extraneous groups on a "standard" system
3085you pass over 0 groups to setgroups(), while on a "different" system you pass
3086over a single group - the current group, which is always the first group in the
3087list. Calling setgroups() with zero groups on a "different" system results in
3088an error return. The following code should cope with both types of system.
3089
3090However, if this process isn't running as root, setgroups() can't be used
3091since you have to be root to run it, even if throwing away groups. Not being
3092root here happens only in some unusual configurations. We just ignore the
3093error. */
3094
3095if (setgroups(0, NULL) != 0)
3096 {
3097 if (setgroups(1, group_list) != 0 && !unprivileged)
3098 {
3099 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3100 exit(EXIT_FAILURE);
3101 }
3102 }
3103
3104/* If the configuration file name has been altered by an argument on the
3105command line (either a new file name or a macro definition) and the caller is
3106not root or the exim user, or if this is a filter testing run, remove any
3107setuid privilege the program has, and run as the underlying user.
3108
3109If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3110severely restricts the use of -C for some purposes.
3111
3112Otherwise, set the real ids to the effective values (should be root unless run
3113from inetd, which it can either be root or the exim uid, if one is configured).
3114
3115There is a private mechanism for bypassing some of this, in order to make it
3116possible to test lots of configurations automatically, without having either to
3117recompile each time, or to patch in an actual configuration file name and other
3118values (such as the path name). If running in the test harness, pretend that
3119configuration file changes and macro definitions haven't happened. */
3120
3121if (( /* EITHER */
3122 (config_changed || macros != NULL) && /* Config changed, and */
3123 real_uid != root_uid && /* Not root, and */
3124 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3125 real_uid != exim_uid && /* Not exim, and */
3126 #endif
3127 !running_in_test_harness /* Not fudged */
3128 ) || /* OR */
3129 expansion_test /* expansion testing */
3130 || /* OR */
f05da2e8 3131 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3132 {
3133 setgroups(group_count, group_list);
3134 exim_setugid(real_uid, real_gid, FALSE,
3135 US"-C, -D, -be or -bf forces real uid");
3136 removed_privilege = TRUE;
3137
3138 /* In the normal case when Exim is called like this, stderr is available
3139 and should be used for any logging information because attempts to write
3140 to the log will usually fail. To arrange this, we unset really_exim. However,
3141 if no stderr is available there is no point - we might as well have a go
3142 at the log (if it fails, syslog will be written). */
3143
3144 if (log_stderr != NULL) really_exim = FALSE;
3145 }
3146
3147/* Privilege is to be retained for the moment. It may be dropped later,
3148depending on the job that this Exim process has been asked to do. For now, set
3149the real uid to the effective so that subsequent re-execs of Exim are done by a
3150privileged user. */
3151
3152else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3153
f05da2e8 3154/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3155setups and reading the message. */
3156
f05da2e8
PH
3157if ((filter_test & FTEST_SYSTEM) != 0)
3158 {
3159 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3160 if (filter_sfd < 0)
3161 {
3162 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3163 strerror(errno));
3164 return EXIT_FAILURE;
3165 }
3166 }
3167
3168if ((filter_test & FTEST_USER) != 0)
059ec3d9 3169 {
f05da2e8
PH
3170 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3171 if (filter_ufd < 0)
059ec3d9 3172 {
f05da2e8 3173 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3174 strerror(errno));
3175 return EXIT_FAILURE;
3176 }
3177 }
3178
3179/* Read the main runtime configuration data; this gives up if there
3180is a failure. It leaves the configuration file open so that the subsequent
3181configuration data for delivery can be read if needed. */
3182
3183readconf_main();
3184
3185/* Handle the decoding of logging options. */
3186
1fe64dcc 3187decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
059ec3d9
PH
3188 log_options, log_options_count, US"log");
3189
3190DEBUG(D_any)
3191 {
3192 debug_printf("configuration file is %s\n", config_main_filename);
3193 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3194 log_extra_selector);
3195 }
3196
3197/* If domain literals are not allowed, check the sender address that was
3198supplied with -f. Ditto for a stripped trailing dot. */
3199
3200if (sender_address != NULL)
3201 {
3202 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3203 {
3204 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3205 "allowed\n", sender_address);
3206 return EXIT_FAILURE;
3207 }
3208 if (f_end_dot && !strip_trailing_dot)
3209 {
3210 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3211 "(trailing dot not allowed)\n", sender_address);
3212 return EXIT_FAILURE;
3213 }
3214 }
3215
3216/* Paranoia check of maximum lengths of certain strings. There is a check
3217on the length of the log file path in log.c, which will come into effect
3218if there are any calls to write the log earlier than this. However, if we
3219get this far but the string is very long, it is better to stop now than to
3220carry on and (e.g.) receive a message and then have to collapse. The call to
3221log_write() from here will cause the ultimate panic collapse if the complete
3222file name exceeds the buffer length. */
3223
3224if (Ustrlen(log_file_path) > 200)
3225 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3226 "log_file_path is longer than 200 chars: aborting");
3227
3228if (Ustrlen(pid_file_path) > 200)
3229 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3230 "pid_file_path is longer than 200 chars: aborting");
3231
3232if (Ustrlen(spool_directory) > 200)
3233 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3234 "spool_directory is longer than 200 chars: aborting");
3235
3236/* Length check on the process name given to syslog for its TAG field,
3237which is only permitted to be 32 characters or less. See RFC 3164. */
3238
3239if (Ustrlen(syslog_processname) > 32)
3240 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3241 "syslog_processname is longer than 32 chars: aborting");
3242
3243/* In some operating systems, the environment variable TMPDIR controls where
3244temporary files are created; Exim doesn't use these (apart from when delivering
3245to MBX mailboxes), but called libraries such as DBM libraries may require them.
3246If TMPDIR is found in the environment, reset it to the value defined in the
3247TMPDIR macro, if this macro is defined. */
3248
3249#ifdef TMPDIR
3250 {
3251 uschar **p;
3252 for (p = USS environ; *p != NULL; p++)
3253 {
3254 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3255 Ustrcmp(*p+7, TMPDIR) != 0)
3256 {
3257 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3258 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3259 *p = newp;
3260 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3261 }
3262 }
3263 }
3264#endif
3265
3266/* Timezone handling. If timezone_string is "utc", set a flag to cause all
3267timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3268we may need to get rid of a bogus timezone setting. This can arise when Exim is
3269called by a user who has set the TZ variable. This then affects the timestamps
3270in log files and in Received: headers, and any created Date: header lines. The
3271required timezone is settable in the configuration file, so nothing can be done
3272about this earlier - but hopefully nothing will normally be logged earlier than
3273this. We have to make a new environment if TZ is wrong, but don't bother if
3274timestamps_utc is set, because then all times are in UTC anyway. */
3275
3276if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3277 {
3278 timestamps_utc = TRUE;
3279 }
3280else
3281 {
3282 uschar *envtz = US getenv("TZ");
3283 if ((envtz == NULL && timezone_string != NULL) ||
3284 (envtz != NULL &&
3285 (timezone_string == NULL ||
3286 Ustrcmp(timezone_string, envtz) != 0)))
3287 {
3288 uschar **p = USS environ;
3289 uschar **new;
3290 uschar **newp;
3291 int count = 0;
3292 while (*p++ != NULL) count++;
3293 if (envtz == NULL) count++;
3294 newp = new = malloc(sizeof(uschar *) * (count + 1));
3295 for (p = USS environ; *p != NULL; p++)
3296 {
3297 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3298 *newp++ = *p;
3299 }
3300 if (timezone_string != NULL)
3301 {
3302 *newp = malloc(Ustrlen(timezone_string) + 4);
3303 sprintf(CS *newp++, "TZ=%s", timezone_string);
3304 }
3305 *newp = NULL;
3306 environ = CSS new;
3307 tzset();
3308 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3309 tod_stamp(tod_log));
3310 }
3311 }
3312
3313/* Handle the case when we have removed the setuid privilege because of -C or
3314-D. This means that the caller of Exim was not root, and, provided that
3315ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3316the binary.
3317
3318If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3319were running as the exim user defined in the configuration file (different to
3320the one in the binary). The sysadmin may expect this case to retain privilege
3321because "the binary was called by the Exim user", but it hasn't, because of the
3322order in which it handles this stuff. There are two possibilities:
3323
3324 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3325 to do message deliveries. Thus, the fact that it is running as a
3326 non-privileged user is plausible, and might be wanted in some special
3327 configurations. However, really_exim will have been set false when
3328 privilege was dropped, to stop Exim trying to write to its normal log
3329 files. Therefore, re-enable normal log processing, assuming the sysadmin
3330 has set up the log directory correctly.
3331
3332 (2) If deliver_drop_privilege is not set, the configuration won't work as
3333 apparently intended, and so we log a panic message. In order to retain
3334 root for -C or -D, the caller must either be root or the Exim user
3335 defined in the binary (when deliver_drop_ privilege is false).
3336
3337If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3338built-in exim user or one defined in the configuration. In either event,
3339re-enable log processing, assuming the sysadmin knows what they are doing. */
3340
3341if (removed_privilege && (config_changed || macros != NULL) &&
3342 real_uid == exim_uid)
3343 {
3344 #ifdef ALT_CONFIG_ROOT_ONLY
3345 really_exim = TRUE; /* let logging work normally */
3346 #else
3347
3348 if (deliver_drop_privilege)
3349 really_exim = TRUE; /* let logging work normally */
3350 else
3351 log_write(0, LOG_MAIN|LOG_PANIC,
3352 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3353 (int)exim_uid, config_changed? "-C" : "-D");
3354 #endif
3355 }
3356
3357/* Start up Perl interpreter if Perl support is configured and there is a
3358perl_startup option, and the configuration or the command line specifies
3359initializing starting. Note that the global variables are actually called
3360opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3361
3362#ifdef EXIM_PERL
3363if (perl_start_option != 0)
3364 opt_perl_at_start = (perl_start_option > 0);
3365if (opt_perl_at_start && opt_perl_startup != NULL)
3366 {
3367 uschar *errstr;
3368 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3369 errstr = init_perl(opt_perl_startup);
3370 if (errstr != NULL)
3371 {
3372 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3373 return EXIT_FAILURE;
3374 }
3375 opt_perl_started = TRUE;
3376 }
3377#endif /* EXIM_PERL */
3378
3379/* Log the arguments of the call if the configuration file said so. This is
3380a debugging feature for finding out what arguments certain MUAs actually use.
3381Don't attempt it if logging is disabled, or if listing variables or if
3382verifying/testing addresses or expansions. */
3383
31619da6
PH
3384if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3385 && really_exim && !list_options && !checking)
059ec3d9
PH
3386 {
3387 int i;
3388 uschar *p = big_buffer;
3389 Ustrcpy(p, "cwd=");
3390 (void)getcwd(CS p+4, big_buffer_size - 4);
3391 while (*p) p++;
3392 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3393 while (*p) p++;
3394 for (i = 0; i < argc; i++)
3395 {
3396 int len = Ustrlen(argv[i]);
3397 uschar *printing;
3398 uschar *quote;
3399 if (p + len + 8 >= big_buffer + big_buffer_size)
3400 {
3401 Ustrcpy(p, " ...");
3402 log_write(0, LOG_MAIN, "%s", big_buffer);
3403 Ustrcpy(big_buffer, "...");
3404 p = big_buffer + 3;
3405 }
3406 printing = string_printing(argv[i]);
3407 if (printing[0] == 0) quote = US"\""; else
3408 {
3409 uschar *pp = printing;
3410 quote = US"";
3411 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3412 }
3413 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3414 (p - big_buffer) - 4), printing, quote);
3415 while (*p) p++;
3416 }
31619da6
PH
3417
3418 if ((log_extra_selector & LX_arguments) != 0)
3419 log_write(0, LOG_MAIN, "%s", big_buffer);
3420 else
3421 debug_printf("%s\n", big_buffer);
059ec3d9
PH
3422 }
3423
3424/* Set the working directory to be the top-level spool directory. We don't rely
3425on this in the code, which always uses fully qualified names, but it's useful
3426for core dumps etc. Don't complain if it fails - the spool directory might not
3427be generally accessible and calls with the -C option (and others) have lost
ba18e66a
PH
3428privilege by now. Before the chdir, we try to ensure that the directory exists.
3429*/
059ec3d9
PH
3430
3431if (Uchdir(spool_directory) != 0)
3432 {
ba18e66a 3433 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
059ec3d9
PH
3434 (void)Uchdir(spool_directory);
3435 }
3436
3437/* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3438alias file. Exim doesn't have such a concept, but this call is screwed into
3439Sun's YP makefiles. Handle this by calling a configured script, as the real
3440user who called Exim. The -oA option can be used to pass an argument to the
3441script. */
3442
3443if (bi_option)
3444 {
1fe64dcc 3445 (void)fclose(config_file);
059ec3d9
PH
3446 if (bi_command != NULL)
3447 {
3448 int i = 0;
3449 uschar *argv[3];
3450 argv[i++] = bi_command;
3451 if (alias_arg != NULL) argv[i++] = alias_arg;
3452 argv[i++] = NULL;
3453
3454 setgroups(group_count, group_list);
3455 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3456
3457 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3458 (argv[1] == NULL)? US"" : argv[1]);
3459
3460 execv(CS argv[0], (char *const *)argv);
3461 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3462 exit(EXIT_FAILURE);
3463 }
3464 else
3465 {
3466 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3467 exit(EXIT_SUCCESS);
3468 }
3469 }
3470
3471/* If an action on specific messages is requested, or if a daemon or queue
3472runner is being started, we need to know if Exim was called by an admin user.
3473This is the case if the real user is root or exim, or if the real group is
3474exim, or if one of the supplementary groups is exim or a group listed in
3475admin_groups. We don't fail all message actions immediately if not admin_user,
3476since some actions can be performed by non-admin users. Instead, set admin_user
3477for later interrogation. */
3478
3479if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3480 admin_user = TRUE;
3481else
3482 {
3483 int i, j;
059ec3d9
PH
3484 for (i = 0; i < group_count; i++)
3485 {
3486 if (group_list[i] == exim_gid) admin_user = TRUE;
3487 else if (admin_groups != NULL)
3488 {
3489 for (j = 1; j <= (int)(admin_groups[0]); j++)
3490 if (admin_groups[j] == group_list[i])
3491 { admin_user = TRUE; break; }
3492 }
3493 if (admin_user) break;
3494 }
3495 }
3496
3497/* Another group of privileged users are the trusted users. These are root,
3498exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3499are permitted to specify sender_addresses with -f on the command line, and
3500other message parameters as well. */
3501
3502if (real_uid == root_uid || real_uid == exim_uid)
3503 trusted_caller = TRUE;
3504else
3505 {
3506 int i, j;
3507
3508 if (trusted_users != NULL)
3509 {
3510 for (i = 1; i <= (int)(trusted_users[0]); i++)
3511 if (trusted_users[i] == real_uid)
3512 { trusted_caller = TRUE; break; }
3513 }
3514
3515 if (!trusted_caller && trusted_groups != NULL)
3516 {
3517 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3518 {
3519 if (trusted_groups[i] == real_gid)
3520 trusted_caller = TRUE;
3521 else for (j = 0; j < group_count; j++)
3522 {
3523 if (trusted_groups[i] == group_list[j])
3524 { trusted_caller = TRUE; break; }
3525 }
3526 if (trusted_caller) break;
3527 }
3528 }
3529 }
3530
3531if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3532if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3533
3534/* Only an admin user may start the daemon or force a queue run in the default
3535configuration, but the queue run restriction can be relaxed. Only an admin
3536user may request that a message be returned to its sender forthwith. Only an
3537admin user may specify a debug level greater than D_v (because it might show
3538passwords, etc. in lookup queries). Only an admin user may request a queue
3539count. */
3540
3541if (!admin_user)
3542 {
3543 BOOL debugset = (debug_selector & ~D_v) != 0;
3544 if (deliver_give_up || daemon_listen ||
3545 (count_queue && queue_list_requires_admin) ||
3546 (list_queue && queue_list_requires_admin) ||
3547 (queue_interval >= 0 && prod_requires_admin) ||
3548 (debugset && !running_in_test_harness))
3549 {
3550 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3551 exit(EXIT_FAILURE);
3552 }
3553 }
3554
3555/* If the real user is not root or the exim uid, the argument for passing
3556in an open TCP/IP connection for another message is not permitted, nor is
3557running with the -N option for any delivery action, unless this call to exim is
3558one that supplied an input message, or we are using a patched exim for
3559regression testing. */
3560
3561if (real_uid != root_uid && real_uid != exim_uid &&
3562 (continue_hostname != NULL ||
3563 (dont_deliver &&
3564 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3565 )) && !running_in_test_harness)
3566 {
3567 fprintf(stderr, "exim: Permission denied\n");
3568 return EXIT_FAILURE;
3569 }
3570
3571/* If the caller is not trusted, certain arguments are ignored when running for
f05da2e8
PH
3572real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3573Note that authority for performing certain actions on messages is tested in the
059ec3d9
PH
3574queue_action() function. */
3575
f05da2e8 3576if (!trusted_caller && !checking && filter_test == FTEST_NONE)
059ec3d9
PH
3577 {
3578 sender_host_name = sender_host_address = interface_address =
3579 sender_ident = received_protocol = NULL;
3580 sender_host_port = interface_port = 0;
3581 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3582 }
3583
3584/* If a sender host address is set, extract the optional port number off the
3585end of it and check its syntax. Do the same thing for the interface address.
3586Exim exits if the syntax is bad. */
3587
3588else
3589 {
3590 if (sender_host_address != NULL)
3591 sender_host_port = check_port(sender_host_address);
3592 if (interface_address != NULL)
3593 interface_port = check_port(interface_address);
3594 }
3595
3596/* If an SMTP message is being received check to see if the standard input is a
3597TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3598caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3599barf. */
3600
3601if (smtp_input)
3602 {
3603 union sockaddr_46 inetd_sock;
36a3b041 3604 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
059ec3d9
PH
3605 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3606 {
3607 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3608 if (family == AF_INET || family == AF_INET6)
3609 {
3610 union sockaddr_46 interface_sock;
3611 size = sizeof(interface_sock);
3612
3613 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3614 interface_address = host_ntoa(-1, &interface_sock, NULL,
3615 &interface_port);
3616
3617 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3618
3619 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3620 {
3621 is_inetd = TRUE;
3622 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3623 NULL, &sender_host_port);
3624 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3625 "inetd is not supported when mua_wrapper is set");
3626 }
3627 else
3628 {
3629 fprintf(stderr,
3630 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3631 return EXIT_FAILURE;
3632 }
3633 }
3634 }
3635 }
3636
3637/* If the load average is going to be needed while receiving a message, get it
3638now for those OS that require the first call to os_getloadavg() to be done as
3639root. There will be further calls later for each message received. */
3640
3641#ifdef LOAD_AVG_NEEDS_ROOT
3642if (receiving_message &&
3643 (queue_only_load >= 0 ||
3644 (is_inetd && smtp_load_reserve >= 0)
3645 ))
3646 {
8669f003 3647 load_average = OS_GETLOADAVG();
059ec3d9
PH
3648 }
3649#endif
3650
3651/* The queue_only configuration option can be overridden by -odx on the command
3652line, except that if queue_only_override is false, queue_only cannot be unset
3653from the command line. */
3654
3655if (queue_only_set && (queue_only_override || arg_queue_only))
3656 queue_only = arg_queue_only;
3657
3658/* The receive_timeout and smtp_receive_timeout options can be overridden by
3659-or and -os. */
3660
3661if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3662if (arg_smtp_receive_timeout >= 0)
3663 smtp_receive_timeout = arg_smtp_receive_timeout;
3664
3665/* If Exim was started with root privilege, unless we have already removed the
3666root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3667except when starting the daemon or doing some kind of delivery or address
3668testing (-bt). These are the only cases when root need to be retained. We run
3669as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
805e5aab
TF
3670retained only for starting the daemon. We always do the initgroups() in this
3671situation (controlled by the TRUE below), in order to be as close as possible
3672to the state Exim usually runs in. */
059ec3d9
PH
3673
3674if (!unprivileged && /* originally had root AND */
3675 !removed_privilege && /* still got root AND */
3676 !daemon_listen && /* not starting the daemon */
3677 queue_interval <= 0 && /* (either kind of daemon) */
3678 ( /* AND EITHER */
3679 deliver_drop_privilege || /* requested unprivileged */
3680 ( /* OR */
3681 queue_interval < 0 && /* not running the queue */
3682 (msg_action_arg < 0 || /* and */
3683 msg_action != MSG_DELIVER) && /* not delivering and */
3684 (!checking || !address_test_mode) /* not address checking */
3685 )
3686 ))
3687 {
805e5aab 3688 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
059ec3d9
PH
3689 }
3690
3691/* When we are retaining a privileged uid, we still change to the exim gid. */
3692
3693else setgid(exim_gid);
3694
3695/* Handle a request to list the delivery queue */
3696
3697if (list_queue)
3698 {
3699 set_process_info("listing the queue");
3700 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3701 exit(EXIT_SUCCESS);
3702 }
3703
3704/* Handle a request to count the delivery queue */
3705
3706if (count_queue)
3707 {
3708 set_process_info("counting the queue");
3709 queue_count();
3710 exit(EXIT_SUCCESS);
3711 }
3712
0ef732d9
PH
3713/* Handle actions on specific messages, except for the force delivery and
3714message load actions, which are done below. Some actions take a whole list of
3715message ids, which are known to continue up to the end of the arguments. Others
3716take a single message id and then operate on the recipients list. */
059ec3d9 3717
0ef732d9 3718if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
059ec3d9
PH
3719 {
3720 int yield = EXIT_SUCCESS;
3721 set_process_info("acting on specified messages");
3722
3723 if (!one_msg_action)
3724 {
3725 for (i = msg_action_arg; i < argc; i++)
3726 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3727 yield = EXIT_FAILURE;
3728 }
3729
3730 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3731 recipients_arg)) yield = EXIT_FAILURE;
3732 exit(yield);
3733 }
3734
3735/* All the modes below here require the remaining configuration sections
3736to be read, except that we can skip over the ACL setting when delivering
3737specific messages, or doing a queue run. (For various testing cases we could
3738skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3739for skipping. */
3740
3741readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3742
3743/* The configuration data will have been read into POOL_PERM because we won't
3744ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3745this is just a bit of pedantic tidiness. It wouldn't really matter if the
3746configuration were read into POOL_MAIN, because we don't do any resets till
3747later on. However, it seems right, and it does ensure that both pools get used.
3748*/
3749
3750store_pool = POOL_MAIN;
3751
3752/* Handle the -brt option. This is for checking out retry configurations.
3753The next three arguments are a domain name or a complete address, and
3754optionally two error numbers. All it does is to call the function that
3755scans the retry configuration data. */
3756
3757if (test_retry_arg >= 0)
3758 {
3759 retry_config *yield;
3760 int basic_errno = 0;
3761 int more_errno = 0;
3762 uschar *s1, *s2;
3763
3764 if (test_retry_arg >= argc)
3765 {
3766 printf("-brt needs a domain or address argument\n");
3767 exim_exit(EXIT_FAILURE);
3768 }
3769 s1 = argv[test_retry_arg++];
3770 s2 = NULL;
3771
3772 /* If the first argument contains no @ and no . it might be a local user
3773 or it might be a single-component name. Treat as a domain. */
3774
3775 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3776 {
3777 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3778 "being \ntreated as a one-component domain, not as a local part.\n\n",
3779 s1);
3780 }
3781
3782 /* There may be an optional second domain arg. */
3783
3784 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3785 s2 = argv[test_retry_arg++];
3786
3787 /* The final arg is an error name */
3788
3789 if (test_retry_arg < argc)
3790 {
3791 uschar *ss = argv[test_retry_arg];
3792 uschar *error =
3793 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3794 if (error != NULL)
3795 {
3796 printf("%s\n", CS error);
3797 return EXIT_FAILURE;
3798 }
3799
e97957bc
PH
3800 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3801 code > 100 as an error is for matching codes to the decade. Turn them into
3802 a real error code, off the decade. */
059ec3d9 3803
e97957bc
PH
3804 if (basic_errno == ERRNO_MAIL4XX ||
3805 basic_errno == ERRNO_RCPT4XX ||
3806 basic_errno == ERRNO_DATA4XX)
059ec3d9
PH
3807 {
3808 int code = (more_errno >> 8) & 255;
3809 if (code == 255)
3810 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3811 else if (code > 100)
3812 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3813 }
3814 }
3815
3816 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3817 if (yield == NULL) printf("No retry information found\n"); else
3818 {
3819 retry_rule *r;
3820 more_errno = yield->more_errno;
3821 printf("Retry rule: %s ", yield->pattern);
3822
3823 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3824 {
3825 printf("quota%s%s ",
3826 (more_errno > 0)? "_" : "",
3827 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3828 }
3829 else if (yield->basic_errno == ECONNREFUSED)
3830 {
3831 printf("refused%s%s ",
3832 (more_errno > 0)? "_" : "",
3833 (more_errno == 'M')? "MX" :
3834 (more_errno == 'A')? "A" : "");
3835 }
3836 else if (yield->basic_errno == ETIMEDOUT)
3837 {
3838 printf("timeout");
3839 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3840 more_errno &= 255;
3841 if (more_errno != 0) printf("_%s",
3842 (more_errno == 'M')? "MX" : "A");
3843 printf(" ");
3844 }
3845 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3846 printf("auth_failed ");
3847 else printf("* ");
3848
3849 for (r = yield->rules; r != NULL; r = r->next)
3850 {
3851 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3852 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3853 if (r->rule == 'G')
3854 {
3855 int x = r->p2;
3856 int f = x % 1000;
3857 int d = 100;
3858 printf(",%d.", x/1000);
3859 do
3860 {
3861 printf("%d", f/d);
3862 f %= d;
3863 d /= 10;
3864 }
3865 while (f != 0);
3866 }
3867 printf("; ");
3868 }
3869
3870 printf("\n");
3871 }
3872 exim_exit(EXIT_SUCCESS);
3873 }
3874
3875/* Handle a request to list one or more configuration options */
3876
3877if (list_options)
3878 {
3879 set_process_info("listing variables");
3880 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3881 else for (i = recipients_arg; i < argc; i++)
3882 {
3883 if (i < argc - 1 &&
3884 (Ustrcmp(argv[i], "router") == 0 ||
3885 Ustrcmp(argv[i], "transport") == 0 ||
3886 Ustrcmp(argv[i], "authenticator") == 0))
3887 {
3888 readconf_print(argv[i+1], argv[i]);
3889 i++;
3890 }
3891 else readconf_print(argv[i], NULL);
3892 }
3893 exim_exit(EXIT_SUCCESS);
3894 }
3895
3896
3897/* Handle a request to deliver one or more messages that are already on the
0ef732d9
PH
3898queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3899above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3900
3901Delivery of specific messages is typically used for a small number when
3902prodding by hand (when the option forced_delivery will be set) or when
3903re-execing to regain root privilege. Each message delivery must happen in a
3904separate process, so we fork a process for each one, and run them sequentially
3905so that debugging output doesn't get intertwined, and to avoid spawning too
3906many processes if a long list is given. However, don't fork for the last one;
3907this saves a process in the common case when Exim is called to deliver just one
3908message. */
3909
3910if (msg_action_arg > 0 && msg_action != MSG_LOAD)
059ec3d9
PH
3911 {
3912 if (prod_requires_admin && !admin_user)
3913 {
3914 fprintf(stderr, "exim: Permission denied\n");
3915 exim_exit(EXIT_FAILURE);
3916 }
3917 set_process_info("delivering specified messages");
3918 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3919 for (i = msg_action_arg; i < argc; i++)
3920 {
3921 int status;
3922 pid_t pid;
3923 if (i == argc - 1)
3924 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3925 else if ((pid = fork()) == 0)
3926 {
3927 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3928 _exit(EXIT_SUCCESS);
3929 }
3930 else if (pid < 0)
3931 {
3932 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3933 strerror(errno));
3934 exim_exit(EXIT_FAILURE);
3935 }
3936 else wait(&status);
3937 }
3938 exim_exit(EXIT_SUCCESS);
3939 }
3940
3941
3942/* If only a single queue run is requested, without SMTP listening, we can just
3943turn into a queue runner, with an optional starting message id. */
3944
3945if (queue_interval == 0 && !daemon_listen)
3946 {
3947 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3948 (start_queue_run_id == NULL)? US"" : US" starting at ",
3949 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3950 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3951 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3952 set_process_info("running the queue (single queue run)");
3953 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3954 exim_exit(EXIT_SUCCESS);
3955 }
3956
3957
3958/* Find the login name of the real user running this process. This is always
3959needed when receiving a message, because it is written into the spool file. It
3960may also be used to construct a from: or a sender: header, and in this case we
3961need the user's full name as well, so save a copy of it, checked for RFC822
3962syntax and munged if necessary, if it hasn't previously been set by the -F
3963argument. We may try to get the passwd entry more than once, in case NIS or
3964other delays are in evidence. Save the home directory for use in filter testing
3965(only). */
3966
3967for (i = 0;;)
3968 {
3969 if ((pw = getpwuid(real_uid)) != NULL)
3970 {
3971 originator_login = string_copy(US pw->pw_name);
3972 originator_home = string_copy(US pw->pw_dir);
3973
3974 /* If user name has not been set by -F, set it from the passwd entry
3975 unless -f has been used to set the sender address by a trusted user. */
3976
3977 if (originator_name == NULL)
3978 {
3979 if (sender_address == NULL ||
f05da2e8 3980 (!trusted_caller && filter_test == FTEST_NONE))
059ec3d9
PH
3981 {
3982 uschar *name = US pw->pw_gecos;
3983 uschar *amp = Ustrchr(name, '&');
3984 uschar buffer[256];
3985
3986 /* Most Unix specify that a '&' character in the gecos field is
3987 replaced by a copy of the login name, and some even specify that
3988 the first character should be upper cased, so that's what we do. */
3989
3990 if (amp != NULL)
3991 {
3992 int loffset;
3993 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3994 amp - name, name, &loffset, originator_login, amp + 1);
3995 buffer[loffset] = toupper(buffer[loffset]);
3996 name = buffer;
3997 }
3998
3999 /* If a pattern for matching the gecos field was supplied, apply
4000 it and then expand the name string. */
4001
4002 if (gecos_pattern != NULL && gecos_name != NULL)
4003 {
4004 const pcre *re;
4005 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4006
4007 if (regex_match_and_setup(re, name, 0, -1))
4008 {
4009 uschar *new_name = expand_string(gecos_name);
4010 expand_nmax = -1;
4011 if (new_name != NULL)
4012 {
4013 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4014 "gecos field \"%s\"\n", new_name, name);
4015 name = new_name;
4016 }
4017 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4018 "\"%s\": %s\n", gecos_name, expand_string_message);
4019 }
4020 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4021 "gecos field \"%s\"\n", gecos_pattern, name);
4022 store_free((void *)re);
4023 }
4024 originator_name = string_copy(name);
4025 }
4026
4027 /* A trusted caller has used -f but not -F */
4028
4029 else originator_name = US"";
4030 }
4031
4032 /* Break the retry loop */
4033
4034 break;
4035 }
4036
4037 if (++i > finduser_retries) break;
4038 sleep(1);
4039 }
4040
4041/* If we cannot get a user login, log the incident and give up, unless the
4042configuration specifies something to use. When running in the test harness,
8800895a 4043any setting of unknown_login overrides the actual name. */
059ec3d9
PH
4044
4045if (originator_login == NULL || running_in_test_harness)
4046 {
4047 if (unknown_login != NULL)
4048 {
4049 originator_login = expand_string(unknown_login);
4050 if (originator_name == NULL && unknown_username != NULL)
4051 originator_name = expand_string(unknown_username);
4052 if (originator_name == NULL) originator_name = US"";
4053 }
4054 if (originator_login == NULL)
4055 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4056 (int)real_uid);
4057 }
4058
4059/* Ensure that the user name is in a suitable form for use as a "phrase" in an
4060RFC822 address.*/
4061
4062originator_name = string_copy(parse_fix_phrase(originator_name,
4063 Ustrlen(originator_name), big_buffer, big_buffer_size));
4064
4065/* If a message is created by this call of Exim, the uid/gid of its originator
4066are those of the caller. These values are overridden if an existing message is
4067read in from the spool. */
4068
4069originator_uid = real_uid;
4070originator_gid = real_gid;
4071
4072DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4073 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4074
4075/* Run in daemon and/or queue-running mode. The function daemon_go() never
4076returns. We leave this till here so that the originator_ fields are available
47c7a64a
PH
4077for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4078mode. */
059ec3d9
PH
4079
4080if (daemon_listen || queue_interval > 0)
4081 {
47c7a64a
PH
4082 if (mua_wrapper)
4083 {
4084 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4085 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4086 "mua_wrapper is set");
4087 }
059ec3d9
PH
4088 daemon_go();
4089 }
4090
4091/* If the sender ident has not been set (by a trusted caller) set it to
4092the caller. This will get overwritten below for an inetd call. If a trusted
4093caller has set it empty, unset it. */
4094
4095if (sender_ident == NULL) sender_ident = originator_login;
4096 else if (sender_ident[0] == 0) sender_ident = NULL;
4097
4098/* Handle the -brw option, which is for checking out rewriting rules. Cause log
4099writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4100originator_* variables set. */
4101
4102if (test_rewrite_arg >= 0)
4103 {
4104 really_exim = FALSE;
4105 if (test_rewrite_arg >= argc)
4106 {
4107 printf("-brw needs an address argument\n");
4108 exim_exit(EXIT_FAILURE);
4109 }
4110 rewrite_test(argv[test_rewrite_arg]);
4111 exim_exit(EXIT_SUCCESS);
4112 }
4113
4114/* A locally-supplied message is considered to be coming from a local user
4115unless a trusted caller supplies a sender address with -f, or is passing in the
4116message via SMTP (inetd invocation or otherwise). */
4117
4118if ((sender_address == NULL && !smtp_input) ||
f05da2e8 4119 (!trusted_caller && filter_test == FTEST_NONE))
059ec3d9
PH
4120 {
4121 sender_local = TRUE;
4122
4123 /* A trusted caller can supply authenticated_sender and authenticated_id
33d73e3b
PH
4124 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4125 defaults except when host checking. */
059ec3d9