Remove ALT_CONFIG_ROOT_ONLY build option, effectively making it always true.
[exim.git] / src / src / exim.c
CommitLineData
73a46702 1/* $Cambridge: exim/src/src/exim.c,v 1.71 2010/06/07 00:12:42 pdp Exp $ */
059ec3d9
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2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
0a49a7a4 7/* Copyright (c) University of Cambridge 1995 - 2009 */
059ec3d9
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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
eb2c0248
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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
1fe64dcc
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494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
059ec3d9
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496 smtp_in = NULL;
497 }
498else
499 {
1fe64dcc
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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 */
059ec3d9
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503 {
504 if (!synchronous_delivery)
505 {
1fe64dcc 506 (void)close(2);
059ec3d9
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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/*************************************************
059ec3d9
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685* Show supported features *
686*************************************************/
687
4b2241d2
PP
688/* This function is called for -bV/--version and for -d to output the optional
689features of the current Exim binary.
059ec3d9
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690
691Arguments: a FILE for printing
692Returns: nothing
693*/
694
695static void
696show_whats_supported(FILE *f)
697{
698#ifdef DB_VERSION_STRING
699fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
700#elif defined(BTREEVERSION) && defined(HASHVERSION)
701 #ifdef USE_DB
702 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
703 #else
704 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
705 #endif
706#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
707fprintf(f, "Probably ndbm\n");
708#elif defined(USE_TDB)
709fprintf(f, "Using tdb\n");
710#else
711 #ifdef USE_GDBM
712 fprintf(f, "Probably GDBM (native mode)\n");
713 #else
714 fprintf(f, "Probably GDBM (compatibility mode)\n");
715 #endif
716#endif
717
718fprintf(f, "Support for:");
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719#ifdef SUPPORT_CRYPTEQ
720 fprintf(f, " crypteq");
721#endif
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722#if HAVE_ICONV
723 fprintf(f, " iconv()");
724#endif
725#if HAVE_IPV6
726 fprintf(f, " IPv6");
727#endif
79378e0f
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728#ifdef HAVE_SETCLASSRESOURCES
729 fprintf(f, " use_setclassresources");
929ba01c 730#endif
059ec3d9
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731#ifdef SUPPORT_PAM
732 fprintf(f, " PAM");
733#endif
734#ifdef EXIM_PERL
735 fprintf(f, " Perl");
736#endif
1a46a8c5
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737#ifdef EXPAND_DLFUNC
738 fprintf(f, " Expand_dlfunc");
739#endif
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740#ifdef USE_TCP_WRAPPERS
741 fprintf(f, " TCPwrappers");
742#endif
743#ifdef SUPPORT_TLS
744 #ifdef USE_GNUTLS
745 fprintf(f, " GnuTLS");
746 #else
747 fprintf(f, " OpenSSL");
748 #endif
749#endif
b2f5a032
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750#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
751 fprintf(f, " translate_ip_address");
752#endif
f174f16e
PH
753#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
754 fprintf(f, " move_frozen_messages");
755#endif
8523533c
TK
756#ifdef WITH_CONTENT_SCAN
757 fprintf(f, " Content_Scanning");
758#endif
80a47a2c
TK
759#ifndef DISABLE_DKIM
760 fprintf(f, " DKIM");
761#endif
8523533c
TK
762#ifdef WITH_OLD_DEMIME
763 fprintf(f, " Old_Demime");
764#endif
765#ifdef EXPERIMENTAL_SPF
766 fprintf(f, " Experimental_SPF");
767#endif
768#ifdef EXPERIMENTAL_SRS
769 fprintf(f, " Experimental_SRS");
770#endif
771#ifdef EXPERIMENTAL_BRIGHTMAIL
772 fprintf(f, " Experimental_Brightmail");
773#endif
6a8f9482
TK
774#ifdef EXPERIMENTAL_DCC
775 fprintf(f, " Experimental_DCC");
776#endif
059ec3d9
PH
777fprintf(f, "\n");
778
779fprintf(f, "Lookups:");
780#ifdef LOOKUP_LSEARCH
781 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
782#endif
783#ifdef LOOKUP_CDB
784 fprintf(f, " cdb");
785#endif
786#ifdef LOOKUP_DBM
787 fprintf(f, " dbm dbmnz");
788#endif
789#ifdef LOOKUP_DNSDB
790 fprintf(f, " dnsdb");
791#endif
792#ifdef LOOKUP_DSEARCH
793 fprintf(f, " dsearch");
794#endif
795#ifdef LOOKUP_IBASE
796 fprintf(f, " ibase");
797#endif
798#ifdef LOOKUP_LDAP
799 fprintf(f, " ldap ldapdn ldapm");
800#endif
801#ifdef LOOKUP_MYSQL
802 fprintf(f, " mysql");
803#endif
804#ifdef LOOKUP_NIS
805 fprintf(f, " nis nis0");
806#endif
807#ifdef LOOKUP_NISPLUS
808 fprintf(f, " nisplus");
809#endif
810#ifdef LOOKUP_ORACLE
811 fprintf(f, " oracle");
812#endif
813#ifdef LOOKUP_PASSWD
814 fprintf(f, " passwd");
815#endif
816#ifdef LOOKUP_PGSQL
817 fprintf(f, " pgsql");
818#endif
13b685f9
PH
819#ifdef LOOKUP_SQLITE
820 fprintf(f, " sqlite");
821#endif
059ec3d9
PH
822#ifdef LOOKUP_TESTDB
823 fprintf(f, " testdb");
824#endif
825#ifdef LOOKUP_WHOSON
826 fprintf(f, " whoson");
827#endif
828fprintf(f, "\n");
829
830fprintf(f, "Authenticators:");
831#ifdef AUTH_CRAM_MD5
832 fprintf(f, " cram_md5");
833#endif
834#ifdef AUTH_CYRUS_SASL
835 fprintf(f, " cyrus_sasl");
836#endif
14aa5a05
PH
837#ifdef AUTH_DOVECOT
838 fprintf(f, " dovecot");
839#endif
059ec3d9
PH
840#ifdef AUTH_PLAINTEXT
841 fprintf(f, " plaintext");
842#endif
843#ifdef AUTH_SPA
844 fprintf(f, " spa");
845#endif
846fprintf(f, "\n");
847
848fprintf(f, "Routers:");
849#ifdef ROUTER_ACCEPT
850 fprintf(f, " accept");
851#endif
852#ifdef ROUTER_DNSLOOKUP
853 fprintf(f, " dnslookup");
854#endif
855#ifdef ROUTER_IPLITERAL
856 fprintf(f, " ipliteral");
857#endif
858#ifdef ROUTER_IPLOOKUP
859 fprintf(f, " iplookup");
860#endif
861#ifdef ROUTER_MANUALROUTE
862 fprintf(f, " manualroute");
863#endif
864#ifdef ROUTER_QUERYPROGRAM
865 fprintf(f, " queryprogram");
866#endif
867#ifdef ROUTER_REDIRECT
868 fprintf(f, " redirect");
869#endif
870fprintf(f, "\n");
871
872fprintf(f, "Transports:");
873#ifdef TRANSPORT_APPENDFILE
874 fprintf(f, " appendfile");
875 #ifdef SUPPORT_MAILDIR
876 fprintf(f, "/maildir");
877 #endif
878 #ifdef SUPPORT_MAILSTORE
879 fprintf(f, "/mailstore");
880 #endif
881 #ifdef SUPPORT_MBX
882 fprintf(f, "/mbx");
883 #endif
884#endif
885#ifdef TRANSPORT_AUTOREPLY
886 fprintf(f, " autoreply");
887#endif
888#ifdef TRANSPORT_LMTP
889 fprintf(f, " lmtp");
890#endif
891#ifdef TRANSPORT_PIPE
892 fprintf(f, " pipe");
893#endif
894#ifdef TRANSPORT_SMTP
895 fprintf(f, " smtp");
896#endif
897fprintf(f, "\n");
898
899if (fixed_never_users[0] > 0)
900 {
901 int i;
902 fprintf(f, "Fixed never_users: ");
903 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
904 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
905 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
906 }
21c28500 907
73a46702 908fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725
NM
909
910/* This runtime check is to help diagnose library linkage mismatches which
911result in segfaults and the like; as such, it's left until the end,
912just in case. There will still be a "Configuration file is" line still to
913come. */
914#ifdef SUPPORT_TLS
915tls_version_report(f);
916#endif
059ec3d9
PH
917}
918
919
920
921
922/*************************************************
923* Quote a local part *
924*************************************************/
925
926/* This function is used when a sender address or a From: or Sender: header
927line is being created from the caller's login, or from an authenticated_id. It
928applies appropriate quoting rules for a local part.
929
930Argument: the local part
931Returns: the local part, quoted if necessary
932*/
933
934uschar *
935local_part_quote(uschar *lpart)
936{
937BOOL needs_quote = FALSE;
938int size, ptr;
939uschar *yield;
940uschar *t;
941
942for (t = lpart; !needs_quote && *t != 0; t++)
943 {
944 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
945 (*t != '.' || t == lpart || t[1] == 0);
946 }
947
948if (!needs_quote) return lpart;
949
950size = ptr = 0;
951yield = string_cat(NULL, &size, &ptr, US"\"", 1);
952
953for (;;)
954 {
955 uschar *nq = US Ustrpbrk(lpart, "\\\"");
956 if (nq == NULL)
957 {
958 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
959 break;
960 }
961 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
962 yield = string_cat(yield, &size, &ptr, US"\\", 1);
963 yield = string_cat(yield, &size, &ptr, nq, 1);
964 lpart = nq + 1;
965 }
966
967yield = string_cat(yield, &size, &ptr, US"\"", 1);
968yield[ptr] = 0;
969return yield;
970}
971
972
973
974#ifdef USE_READLINE
975/*************************************************
976* Load readline() functions *
977*************************************************/
978
979/* This function is called from testing executions that read data from stdin,
980but only when running as the calling user. Currently, only -be does this. The
981function loads the readline() function library and passes back the functions.
982On some systems, it needs the curses library, so load that too, but try without
983it if loading fails. All this functionality has to be requested at build time.
984
985Arguments:
986 fn_readline_ptr pointer to where to put the readline pointer
987 fn_addhist_ptr pointer to where to put the addhistory function
988
989Returns: the dlopen handle or NULL on failure
990*/
991
992static void *
993set_readline(char * (**fn_readline_ptr)(char *),
994 char * (**fn_addhist_ptr)(char *))
995{
996void *dlhandle;
997void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
998
999dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1000if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1001
1002if (dlhandle != NULL)
1003 {
1004 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1005 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1006 }
1007else
1008 {
1009 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1010 }
1011
1012return dlhandle;
1013}
1014#endif
1015
1016
1017
1018/*************************************************
1019* Get a line from stdin for testing things *
1020*************************************************/
1021
1022/* This function is called when running tests that can take a number of lines
1023of input (for example, -be and -bt). It handles continuations and trailing
1024spaces. And prompting and a blank line output on eof. If readline() is in use,
1025the arguments are non-NULL and provide the relevant functions.
1026
1027Arguments:
1028 fn_readline readline function or NULL
1029 fn_addhist addhist function or NULL
1030
1031Returns: pointer to dynamic memory, or NULL at end of file
1032*/
1033
1034static uschar *
1035get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1036{
1037int i;
1038int size = 0;
1039int ptr = 0;
1040uschar *yield = NULL;
1041
328895cc 1042if (fn_readline == NULL) { printf("> "); fflush(stdout); }
059ec3d9
PH
1043
1044for (i = 0;; i++)
1045 {
1046 uschar buffer[1024];
1047 uschar *p, *ss;
1048
1049 #ifdef USE_READLINE
1050 char *readline_line = NULL;
1051 if (fn_readline != NULL)
1052 {
1053 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1054 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1055 p = US readline_line;
1056 }
1057 else
1058 #endif
1059
1060 /* readline() not in use */
1061
1062 {
1063 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1064 p = buffer;
1065 }
1066
1067 /* Handle the line */
1068
1069 ss = p + (int)Ustrlen(p);
1070 while (ss > p && isspace(ss[-1])) ss--;
1071
1072 if (i > 0)
1073 {
1074 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1075 }
1076
1077 yield = string_cat(yield, &size, &ptr, p, ss - p);
1078
1079 #ifdef USE_READLINE
1080 if (fn_readline != NULL) free(readline_line);
1081 #endif
1082
1083 if (ss == p || yield[ptr-1] != '\\')
1084 {
1085 yield[ptr] = 0;
1086 break;
1087 }
1088 yield[--ptr] = 0;
1089 }
1090
1091if (yield == NULL) printf("\n");
1092return yield;
1093}
1094
1095
1096
1097/*************************************************
81ea09ca
NM
1098* Output usage information for the program *
1099*************************************************/
1100
1101/* This function is called when there are no recipients
1102 or a specific --help argument was added.
1103
1104Arguments:
1105 progname information on what name we were called by
1106
1107Returns: DOES NOT RETURN
1108*/
1109
1110static void
1111exim_usage(uschar *progname)
1112{
1113
1114/* Handle specific program invocation varients */
1115if (Ustrcmp(progname, US"-mailq") == 0)
1116 {
1117 fprintf(stderr,
e765a0f1 1118 "mailq - list the contents of the mail queue\n\n"
81ea09ca
NM
1119 "For a list of options, see the Exim documentation.\n");
1120 exit(EXIT_FAILURE);
1121 }
1122
1123/* Generic usage - we output this whatever happens */
1124fprintf(stderr,
1125 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1126 "not directly from a shell command line. Options and/or arguments control\n"
1127 "what it does when called. For a list of options, see the Exim documentation.\n");
1128
1129exit(EXIT_FAILURE);
1130}
1131
1132
1133
1134/*************************************************
059ec3d9
PH
1135* Entry point and high-level code *
1136*************************************************/
1137
1138/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1139the appropriate action. All the necessary functions are present in the one
1140binary. I originally thought one should split it up, but it turns out that so
1141much of the apparatus is needed in each chunk that one might as well just have
1142it all available all the time, which then makes the coding easier as well.
1143
1144Arguments:
1145 argc count of entries in argv
1146 argv argument strings, with argv[0] being the program name
1147
1148Returns: EXIT_SUCCESS if terminated successfully
1149 EXIT_FAILURE otherwise, except when a message has been sent
1150 to the sender, and -oee was given
1151*/
1152
1153int
1154main(int argc, char **cargv)
1155{
1156uschar **argv = USS cargv;
1157int arg_receive_timeout = -1;
1158int arg_smtp_receive_timeout = -1;
1159int arg_error_handling = error_handling;
f05da2e8
PH
1160int filter_sfd = -1;
1161int filter_ufd = -1;
059ec3d9
PH
1162int group_count;
1163int i;
1164int list_queue_option = 0;
1165int msg_action = 0;
1166int msg_action_arg = -1;
1167int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1168int queue_only_reason = 0;
1169#ifdef EXIM_PERL
1170int perl_start_option = 0;
1171#endif
1172int recipients_arg = argc;
1173int sender_address_domain = 0;
1174int test_retry_arg = -1;
1175int test_rewrite_arg = -1;
1176BOOL arg_queue_only = FALSE;
1177BOOL bi_option = FALSE;
1178BOOL checking = FALSE;
1179BOOL count_queue = FALSE;
1180BOOL expansion_test = FALSE;
1181BOOL extract_recipients = FALSE;
1182BOOL forced_delivery = FALSE;
1183BOOL f_end_dot = FALSE;
1184BOOL deliver_give_up = FALSE;
1185BOOL list_queue = FALSE;
1186BOOL list_options = FALSE;
1187BOOL local_queue_only;
1188BOOL more = TRUE;
1189BOOL one_msg_action = FALSE;
1190BOOL queue_only_set = FALSE;
1191BOOL receiving_message = TRUE;
33d73e3b 1192BOOL sender_ident_set = FALSE;
8669f003 1193BOOL session_local_queue_only;
059ec3d9
PH
1194BOOL unprivileged;
1195BOOL removed_privilege = FALSE;
81ea09ca 1196BOOL usage_wanted = FALSE;
059ec3d9
PH
1197BOOL verify_address_mode = FALSE;
1198BOOL verify_as_sender = FALSE;
1199BOOL version_printed = FALSE;
1200uschar *alias_arg = NULL;
1201uschar *called_as = US"";
1202uschar *start_queue_run_id = NULL;
1203uschar *stop_queue_run_id = NULL;
328895cc 1204uschar *expansion_test_message = NULL;
059ec3d9
PH
1205uschar *ftest_domain = NULL;
1206uschar *ftest_localpart = NULL;
1207uschar *ftest_prefix = NULL;
1208uschar *ftest_suffix = NULL;
8544e77a 1209uschar *malware_test_file = NULL;
059ec3d9
PH
1210uschar *real_sender_address;
1211uschar *originator_home = US"/";
059ec3d9
PH
1212void *reset_point;
1213
1214struct passwd *pw;
1215struct stat statbuf;
1216pid_t passed_qr_pid = (pid_t)0;
1217int passed_qr_pipe = -1;
1218gid_t group_list[NGROUPS_MAX];
1219
1220/* Possible options for -R and -S */
1221
1222static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1223
1224/* Need to define this in case we need to change the environment in order
1225to get rid of a bogus time zone. We have to make it char rather than uschar
1226because some OS define it in /usr/include/unistd.h. */
1227
1228extern char **environ;
1229
35edf2ff 1230/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1231defined by ref:name at build time, we must now find the actual uid/gid values.
1232This is a feature to make the lives of binary distributors easier. */
1233
1234#ifdef EXIM_USERNAME
1235if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1236 {
10385c15
PP
1237 if (exim_uid == 0)
1238 {
1239 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1240 EXIM_USERNAME);
1241 exit(EXIT_FAILURE);
1242 }
059ec3d9
PH
1243 exim_gid = pw->pw_gid;
1244 }
1245else
1246 {
1247 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1248 EXIM_USERNAME);
1249 exit(EXIT_FAILURE);
1250 }
1251#endif
1252
1253#ifdef EXIM_GROUPNAME
1254if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1255 {
1256 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1257 EXIM_GROUPNAME);
1258 exit(EXIT_FAILURE);
1259 }
1260#endif
1261
1262#ifdef CONFIGURE_OWNERNAME
1263if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1264 {
1265 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1266 CONFIGURE_OWNERNAME);
1267 exit(EXIT_FAILURE);
1268 }
1269#endif
1270
35edf2ff
PH
1271#ifdef CONFIGURE_GROUPNAME
1272if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1273 {
1274 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1275 CONFIGURE_GROUPNAME);
1276 exit(EXIT_FAILURE);
1277 }
1278#endif
1279
059ec3d9
PH
1280/* In the Cygwin environment, some initialization needs doing. It is fudged
1281in by means of this macro. */
1282
1283#ifdef OS_INIT
1284OS_INIT
1285#endif
1286
1287/* Check a field which is patched when we are running Exim within its
1288testing harness; do a fast initial check, and then the whole thing. */
1289
1290running_in_test_harness =
1291 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1292
1293/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1294at the start of a program; however, it seems that some environments do not
1295follow this. A "strange" locale can affect the formatting of timestamps, so we
1296make quite sure. */
1297
1298setlocale(LC_ALL, "C");
1299
1300/* Set up the default handler for timing using alarm(). */
1301
1302os_non_restarting_signal(SIGALRM, sigalrm_handler);
1303
1304/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1305because store_malloc writes a log entry on failure. */
1306
1307log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1308if (log_buffer == NULL)
1309 {
1310 fprintf(stderr, "exim: failed to get store for log buffer\n");
1311 exit(EXIT_FAILURE);
1312 }
1313
1314/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1315NULL when the daemon is run and the file is closed. We have to use this
1316indirection, because some systems don't allow writing to the variable "stderr".
1317*/
1318
1319if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1320
1321/* Arrange for the PCRE regex library to use our store functions. Note that
1322the normal calls are actually macros that add additional arguments for
1323debugging purposes so we have to assign specially constructed functions here.
1324The default is to use store in the stacking pool, but this is overridden in the
1325regex_must_compile() function. */
1326
1327pcre_malloc = function_store_get;
1328pcre_free = function_dummy_free;
1329
1330/* Ensure there is a big buffer for temporary use in several places. It is put
1331in malloc store so that it can be freed for enlargement if necessary. */
1332
1333big_buffer = store_malloc(big_buffer_size);
1334
1335/* Set up the handler for the data request signal, and set the initial
1336descriptive text. */
1337
1338set_process_info("initializing");
1339os_restarting_signal(SIGUSR1, usr1_handler);
1340
1341/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1342in the daemon code. For the rest of Exim's uses, we ignore it. */
1343
1344signal(SIGHUP, SIG_IGN);
1345
1346/* We don't want to die on pipe errors as the code is written to handle
1347the write error instead. */
1348
1349signal(SIGPIPE, SIG_IGN);
1350
1351/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1352set to SIG_IGN. This causes subprocesses that complete before the parent
1353process waits for them not to hang around, so when Exim calls wait(), nothing
1354is there. The wait() code has been made robust against this, but let's ensure
1355that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1356ending status. We use sigaction rather than plain signal() on those OS where
1357SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1358problem on AIX with this.) */
1359
1360#ifdef SA_NOCLDWAIT
1361 {
1362 struct sigaction act;
1363 act.sa_handler = SIG_DFL;
1364 sigemptyset(&(act.sa_mask));
1365 act.sa_flags = 0;
1366 sigaction(SIGCHLD, &act, NULL);
1367 }
1368#else
1369signal(SIGCHLD, SIG_DFL);
1370#endif
1371
1372/* Save the arguments for use if we re-exec exim as a daemon after receiving
1373SIGHUP. */
1374
1375sighup_argv = argv;
1376
1377/* Set up the version number. Set up the leading 'E' for the external form of
1378message ids, set the pointer to the internal form, and initialize it to
1379indicate no message being processed. */
1380
1381version_init();
1382message_id_option[0] = '-';
1383message_id_external = message_id_option + 1;
1384message_id_external[0] = 'E';
1385message_id = message_id_external + 1;
1386message_id[0] = 0;
1387
67d175de 1388/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1389created with the modes that it specifies. NOTE: Files created with fopen() have
1390a problem, which was not recognized till rather late (February 2006). With this
1391umask, such files will be world writeable. (They are all content scanning files
1392in the spool directory, which isn't world-accessible, so this is not a
1393disaster, but it's untidy.) I don't want to change this overall setting,
1394however, because it will interact badly with the open() calls. Instead, there's
1395now a function called modefopen() that fiddles with the umask while calling
1396fopen(). */
059ec3d9 1397
67d175de 1398(void)umask(0);
059ec3d9
PH
1399
1400/* Precompile the regular expression for matching a message id. Keep this in
1401step with the code that generates ids in the accept.c module. We need to do
1402this here, because the -M options check their arguments for syntactic validity
1403using mac_ismsgid, which uses this. */
1404
1405regex_ismsgid =
1406 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1407
a5bd321b 1408/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1409code, possibly extended, at the start of an error message. Note that the
1410terminating whitespace character is included. */
a5bd321b
PH
1411
1412regex_smtp_code =
1413 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1414 FALSE, TRUE);
1415
059ec3d9
PH
1416/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1417this seems to be a generally accepted convention, since one finds symbolic
1418links called "mailq" in standard OS configurations. */
1419
1420if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1421 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1422 {
1423 list_queue = TRUE;
1424 receiving_message = FALSE;
1425 called_as = US"-mailq";
1426 }
1427
1428/* If the program is called as "rmail" treat it as equivalent to
1429"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1430i.e. preventing a single dot on a line from terminating the message, and
1431returning with zero return code, even in cases of error (provided an error
1432message has been sent). */
1433
1434if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1435 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1436 {
1437 dot_ends = FALSE;
1438 called_as = US"-rmail";
1439 errors_sender_rc = EXIT_SUCCESS;
1440 }
1441
1442/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1443this is a smail convention. */
1444
1445if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1446 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1447 {
1448 smtp_input = smtp_batched_input = TRUE;
1449 called_as = US"-rsmtp";
1450 }
1451
1452/* If the program is called as "runq" treat it as equivalent to "exim -q";
1453this is a smail convention. */
1454
1455if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1456 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1457 {
1458 queue_interval = 0;
1459 receiving_message = FALSE;
1460 called_as = US"-runq";
1461 }
1462
1463/* If the program is called as "newaliases" treat it as equivalent to
1464"exim -bi"; this is a sendmail convention. */
1465
1466if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1467 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1468 {
1469 bi_option = TRUE;
1470 receiving_message = FALSE;
1471 called_as = US"-newaliases";
1472 }
1473
1474/* Save the original effective uid for a couple of uses later. It should
1475normally be root, but in some esoteric environments it may not be. */
1476
1477original_euid = geteuid();
1478
1479/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1480to be the same as the real ones. This makes a difference only if Exim is setuid
1481(or setgid) to something other than root, which could be the case in some
1482special configurations. */
1483
1484real_uid = getuid();
1485real_gid = getgid();
1486
1487if (real_uid == root_uid)
1488 {
1489 setgid(real_gid);
1490 setuid(real_uid);
1491 }
1492
1493/* If neither the original real uid nor the original euid was root, Exim is
1494running in an unprivileged state. */
1495
1496unprivileged = (real_uid != root_uid && original_euid != root_uid);
1497
059ec3d9
PH
1498/* Scan the program's arguments. Some can be dealt with right away; others are
1499simply recorded for checking and handling afterwards. Do a high-level switch
1500on the second character (the one after '-'), to save some effort. */
1501
1502for (i = 1; i < argc; i++)
1503 {
1504 BOOL badarg = FALSE;
1505 uschar *arg = argv[i];
1506 uschar *argrest;
1507 int switchchar;
1508
1509 /* An argument not starting with '-' is the start of a recipients list;
1510 break out of the options-scanning loop. */
1511
1512 if (arg[0] != '-')
1513 {
1514 recipients_arg = i;
1515 break;
1516 }
1517
1518 /* An option consistion of -- terminates the options */
1519
1520 if (Ustrcmp(arg, "--") == 0)
1521 {
1522 recipients_arg = i + 1;
1523 break;
1524 }
1525
1526 /* Handle flagged options */
1527
1528 switchchar = arg[1];
1529 argrest = arg+2;
1530
1531 /* Make all -ex options synonymous with -oex arguments, since that
1532 is assumed by various callers. Also make -qR options synonymous with -R
1533 options, as that seems to be required as well. Allow for -qqR too, and
1534 the same for -S options. */
1535
1536 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1537 Ustrncmp(arg+1, "qR", 2) == 0 ||
1538 Ustrncmp(arg+1, "qS", 2) == 0)
1539 {
1540 switchchar = arg[2];
1541 argrest++;
1542 }
1543 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1544 {
1545 switchchar = arg[3];
1546 argrest += 2;
1547 queue_2stage = TRUE;
1548 }
1549
1550 /* Make -r synonymous with -f, since it is a documented alias */
1551
1552 else if (arg[1] == 'r') switchchar = 'f';
1553
1554 /* Make -ov synonymous with -v */
1555
1556 else if (Ustrcmp(arg, "-ov") == 0)
1557 {
1558 switchchar = 'v';
1559 argrest++;
1560 }
1561
4b2241d2
PP
1562 /* deal with --option_aliases */
1563 else if (switchchar == '-')
1564 {
1565 if (Ustrcmp(argrest, "help") == 0)
1566 {
1567 usage_wanted = TRUE;
1568 break;
1569 }
1570 else if (Ustrcmp(argrest, "version") == 0)
1571 {
1572 switchchar = 'b';
73a46702 1573 argrest = US"V";
4b2241d2
PP
1574 }
1575 }
1576
059ec3d9
PH
1577 /* High-level switch on active initial letter */
1578
1579 switch(switchchar)
1580 {
1581 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1582 so has no need of it. */
1583
1584 case 'B':
1585 if (*argrest == 0) i++; /* Skip over the type */
1586 break;
1587
1588
1589 case 'b':
1590 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1591
1592 /* -bd: Run in daemon mode, awaiting SMTP connections.
1593 -bdf: Ditto, but in the foreground.
1594 */
1595
1596 if (*argrest == 'd')
1597 {
1598 daemon_listen = TRUE;
1599 if (*(++argrest) == 'f') background_daemon = FALSE;
1600 else if (*argrest != 0) { badarg = TRUE; break; }
1601 }
1602
328895cc
PH
1603 /* -be: Run in expansion test mode
1604 -bem: Ditto, but read a message from a file first
1605 */
059ec3d9
PH
1606
1607 else if (*argrest == 'e')
328895cc 1608 {
059ec3d9 1609 expansion_test = checking = TRUE;
328895cc
PH
1610 if (argrest[1] == 'm')
1611 {
1612 if (++i >= argc) { badarg = TRUE; break; }
1613 expansion_test_message = argv[i];
1614 argrest++;
1615 }
1616 if (argrest[1] != 0) { badarg = TRUE; break; }
1617 }
059ec3d9 1618
f05da2e8
PH
1619 /* -bF: Run system filter test */
1620
1621 else if (*argrest == 'F')
1622 {
1623 filter_test |= FTEST_SYSTEM;
1624 if (*(++argrest) != 0) { badarg = TRUE; break; }
1625 if (++i < argc) filter_test_sfile = argv[i]; else
1626 {
1627 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1628 exit(EXIT_FAILURE);
1629 }
1630 }
1631
1632 /* -bf: Run user filter test
059ec3d9
PH
1633 -bfd: Set domain for filter testing
1634 -bfl: Set local part for filter testing
1635 -bfp: Set prefix for filter testing
1636 -bfs: Set suffix for filter testing
1637 */
1638
f05da2e8 1639 else if (*argrest == 'f')
059ec3d9 1640 {
f05da2e8 1641 if (*(++argrest) == 0)
059ec3d9 1642 {
f05da2e8
PH
1643 filter_test |= FTEST_USER;
1644 if (++i < argc) filter_test_ufile = argv[i]; else
059ec3d9
PH
1645 {
1646 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1647 exit(EXIT_FAILURE);
1648 }
1649 }
1650 else
1651 {
1652 if (++i >= argc)
1653 {
1654 fprintf(stderr, "exim: string expected after %s\n", arg);
1655 exit(EXIT_FAILURE);
1656 }
1657 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1658 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1659 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1660 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1661 else { badarg = TRUE; break; }
1662 }
1663 }
1664
1665 /* -bh: Host checking - an IP address must follow. */
1666
1667 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1668 {
1669 if (++i >= argc) { badarg = TRUE; break; }
1670 sender_host_address = argv[i];
1671 host_checking = checking = log_testing_mode = TRUE;
1672 host_checking_callout = argrest[1] == 'c';
1673 }
1674
1675 /* -bi: This option is used by sendmail to initialize *the* alias file,
1676 though it has the -oA option to specify a different file. Exim has no
1677 concept of *the* alias file, but since Sun's YP make script calls
1678 sendmail this way, some support must be provided. */
1679
1680 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1681
1682 /* -bm: Accept and deliver message - the default option. Reinstate
1683 receiving_message, which got turned off for all -b options. */
1684
1685 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1686
8544e77a
PP
1687 /* -bmalware: test the filename given for malware */
1688
1689 else if (Ustrcmp(argrest, "malware") == 0)
1690 {
1691 if (++i >= argc) { badarg = TRUE; break; }
1692 malware_test_file = argv[i];
1693 }
1694
059ec3d9
PH
1695 /* -bnq: For locally originating messages, do not qualify unqualified
1696 addresses. In the envelope, this causes errors; in header lines they
1697 just get left. */
1698
1699 else if (Ustrcmp(argrest, "nq") == 0)
1700 {
1701 allow_unqualified_sender = FALSE;
1702 allow_unqualified_recipient = FALSE;
1703 }
1704
1705 /* -bpxx: List the contents of the mail queue, in various forms. If
1706 the option is -bpc, just a queue count is needed. Otherwise, if the
1707 first letter after p is r, then order is random. */
1708
1709 else if (*argrest == 'p')
1710 {
1711 if (*(++argrest) == 'c')
1712 {
1713 count_queue = TRUE;
1714 if (*(++argrest) != 0) badarg = TRUE;
1715 break;
1716 }
1717
1718 if (*argrest == 'r')
1719 {
1720 list_queue_option = 8;
1721 argrest++;
1722 }
1723 else list_queue_option = 0;
1724
1725 list_queue = TRUE;
1726
1727 /* -bp: List the contents of the mail queue, top-level only */
1728
1729 if (*argrest == 0) {}
1730
1731 /* -bpu: List the contents of the mail queue, top-level undelivered */
1732
1733 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1734
1735 /* -bpa: List the contents of the mail queue, including all delivered */
1736
1737 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1738
1739 /* Unknown after -bp[r] */
1740
1741 else
1742 {
1743 badarg = TRUE;
1744 break;
1745 }
1746 }
1747
1748
1749 /* -bP: List the configuration variables given as the address list.
1750 Force -v, so configuration errors get displayed. */
1751
1752 else if (Ustrcmp(argrest, "P") == 0)
1753 {
1754 list_options = TRUE;
1755 debug_selector |= D_v;
1756 debug_file = stderr;
1757 }
1758
1759 /* -brt: Test retry configuration lookup */
1760
1761 else if (Ustrcmp(argrest, "rt") == 0)
1762 {
1763 test_retry_arg = i + 1;
1764 goto END_ARG;
1765 }
1766
1767 /* -brw: Test rewrite configuration */
1768
1769 else if (Ustrcmp(argrest, "rw") == 0)
1770 {
1771 test_rewrite_arg = i + 1;
1772 goto END_ARG;
1773 }
1774
1775 /* -bS: Read SMTP commands on standard input, but produce no replies -
1776 all errors are reported by sending messages. */
1777
1778 else if (Ustrcmp(argrest, "S") == 0)
1779 smtp_input = smtp_batched_input = receiving_message = TRUE;
1780
1781 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1782 on standard output. */
1783
1784 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1785
1786 /* -bt: address testing mode */
1787
1788 else if (Ustrcmp(argrest, "t") == 0)
1789 address_test_mode = checking = log_testing_mode = TRUE;
1790
1791 /* -bv: verify addresses */
1792
1793 else if (Ustrcmp(argrest, "v") == 0)
1794 verify_address_mode = checking = log_testing_mode = TRUE;
1795
1796 /* -bvs: verify sender addresses */
1797
1798 else if (Ustrcmp(argrest, "vs") == 0)
1799 {
1800 verify_address_mode = checking = log_testing_mode = TRUE;
1801 verify_as_sender = TRUE;
1802 }
1803
1804 /* -bV: Print version string and support details */
1805
1806 else if (Ustrcmp(argrest, "V") == 0)
1807 {
1808 printf("Exim version %s #%s built %s\n", version_string,
1809 version_cnumber, version_date);
1810 printf("%s\n", CS version_copyright);
1811 version_printed = TRUE;
1812 show_whats_supported(stdout);
1813 }
1814
1815 else badarg = TRUE;
1816 break;
1817
1818
1819 /* -C: change configuration file list; ignore if it isn't really
1820 a change! Enforce a prefix check if required. */
1821
1822 case 'C':
1823 if (*argrest == 0)
1824 {
1825 if(++i < argc) argrest = argv[i]; else
1826 { badarg = TRUE; break; }
1827 }
1828 if (Ustrcmp(config_main_filelist, argrest) != 0)
1829 {
1830 #ifdef ALT_CONFIG_PREFIX
1831 int sep = 0;
1832 int len = Ustrlen(ALT_CONFIG_PREFIX);
1833 uschar *list = argrest;
1834 uschar *filename;
1835 while((filename = string_nextinlist(&list, &sep, big_buffer,
1836 big_buffer_size)) != NULL)
1837 {
1838 if ((Ustrlen(filename) < len ||
1839 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1840 Ustrstr(filename, "/../") != NULL) &&
1841 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1842 {
1843 fprintf(stderr, "-C Permission denied\n");
1844 exit(EXIT_FAILURE);
1845 }
1846 }
1847 #endif
1848
1849 config_main_filelist = argrest;
1850 config_changed = TRUE;
e2f5dc15 1851 trusted_config = FALSE;
059ec3d9
PH
1852 }
1853 break;
1854
1855
1856 /* -D: set up a macro definition */
1857
1858 case 'D':
1859 #ifdef DISABLE_D_OPTION
1860 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1861 exit(EXIT_FAILURE);
1862 #else
1863 {
1864 int ptr = 0;
1865 macro_item *mlast = NULL;
1866 macro_item *m;
1867 uschar name[24];
1868 uschar *s = argrest;
1869
1870 while (isspace(*s)) s++;
1871
1872 if (*s < 'A' || *s > 'Z')
1873 {
1874 fprintf(stderr, "exim: macro name set by -D must start with "
1875 "an upper case letter\n");
1876 exit(EXIT_FAILURE);
1877 }
1878
1879 while (isalnum(*s) || *s == '_')
1880 {
1881 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1882 s++;
1883 }
1884 name[ptr] = 0;
1885 if (ptr == 0) { badarg = TRUE; break; }
1886 while (isspace(*s)) s++;
1887 if (*s != 0)
1888 {
1889 if (*s++ != '=') { badarg = TRUE; break; }
1890 while (isspace(*s)) s++;
1891 }
1892
1893 for (m = macros; m != NULL; m = m->next)
1894 {
1895 if (Ustrcmp(m->name, name) == 0)
1896 {
1897 fprintf(stderr, "exim: duplicated -D in command line\n");
1898 exit(EXIT_FAILURE);
1899 }
1900 mlast = m;
1901 }
1902
1903 m = store_get(sizeof(macro_item) + Ustrlen(name));
1904 m->next = NULL;
1905 m->command_line = TRUE;
1906 if (mlast == NULL) macros = m; else mlast->next = m;
1907 Ustrcpy(m->name, name);
1908 m->replacement = string_copy(s);
1909
1910 if (clmacro_count >= MAX_CLMACROS)
1911 {
1912 fprintf(stderr, "exim: too many -D options on command line\n");
1913 exit(EXIT_FAILURE);
1914 }
1915 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1916 m->replacement);
1917 }
1918 #endif
1919 break;
1920
1921 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 1922 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 1923 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
1924
1925 case 'd':
1926 if (Ustrcmp(argrest, "ropcr") == 0)
1927 {
1928 /* drop_cr = TRUE; */
1929 }
1930
1931 /* Use an intermediate variable so that we don't set debugging while
1932 decoding the debugging bits. */
1933
1934 else
1935 {
1936 unsigned int selector = D_default;
1937 debug_selector = 0;
1938 debug_file = NULL;
3d235903
PH
1939 if (*argrest == 'd')
1940 {
1941 debug_daemon = TRUE;
1942 argrest++;
1943 }
059ec3d9 1944 if (*argrest != 0)
1fe64dcc 1945 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
ed7f7860 1946 debug_options_count, US"debug", 0);
059ec3d9
PH
1947 debug_selector = selector;
1948 }
1949 break;
1950
1951
1952 /* -E: This is a local error message. This option is not intended for
1953 external use at all, but is not restricted to trusted callers because it
1954 does no harm (just suppresses certain error messages) and if Exim is run
1955 not setuid root it won't always be trusted when it generates error
1956 messages using this option. If there is a message id following -E, point
1957 message_reference at it, for logging. */
1958
1959 case 'E':
1960 local_error_message = TRUE;
1961 if (mac_ismsgid(argrest)) message_reference = argrest;
1962 break;
1963
1964
1965 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1966 option, so it looks as if historically the -oex options are also callable
1967 without the leading -o. So we have to accept them. Before the switch,
1968 anything starting -oe has been converted to -e. Exim does not support all
1969 of the sendmail error options. */
1970
1971 case 'e':
1972 if (Ustrcmp(argrest, "e") == 0)
1973 {
1974 arg_error_handling = ERRORS_SENDER;
1975 errors_sender_rc = EXIT_SUCCESS;
1976 }
1977 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1978 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1979 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1980 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1981 else badarg = TRUE;
1982 break;
1983
1984
1985 /* -F: Set sender's full name, used instead of the gecos entry from
1986 the password file. Since users can usually alter their gecos entries,
1987 there's no security involved in using this instead. The data can follow
1988 the -F or be in the next argument. */
1989
1990 case 'F':
1991 if (*argrest == 0)
1992 {
1993 if(++i < argc) argrest = argv[i]; else
1994 { badarg = TRUE; break; }
1995 }
1996 originator_name = argrest;
2fe1a124 1997 sender_name_forced = TRUE;
059ec3d9
PH
1998 break;
1999
2000
2001 /* -f: Set sender's address - this value is only actually used if Exim is
2002 run by a trusted user, or if untrusted_set_sender is set and matches the
2003 address, except that the null address can always be set by any user. The
2004 test for this happens later, when the value given here is ignored when not
2005 permitted. For an untrusted user, the actual sender is still put in Sender:
2006 if it doesn't match the From: header (unless no_local_from_check is set).
2007 The data can follow the -f or be in the next argument. The -r switch is an
2008 obsolete form of -f but since there appear to be programs out there that
2009 use anything that sendmail has ever supported, better accept it - the
2010 synonymizing is done before the switch above.
2011
2012 At this stage, we must allow domain literal addresses, because we don't
2013 know what the setting of allow_domain_literals is yet. Ditto for trailing
2014 dots and strip_trailing_dot. */
2015
2016 case 'f':
2017 {
2018 int start, end;
2019 uschar *errmess;
2020 if (*argrest == 0)
2021 {
2022 if (i+1 < argc) argrest = argv[++i]; else
2023 { badarg = TRUE; break; }
2024 }
2025 if (*argrest == 0)
2026 {
2027 sender_address = string_sprintf(""); /* Ensure writeable memory */
2028 }
2029 else
2030 {
2031 uschar *temp = argrest + Ustrlen(argrest) - 1;
2032 while (temp >= argrest && isspace(*temp)) temp--;
2033 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2034 allow_domain_literals = TRUE;
2035 strip_trailing_dot = TRUE;
2036 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2037 &sender_address_domain, TRUE);
2038 allow_domain_literals = FALSE;
2039 strip_trailing_dot = FALSE;
2040 if (sender_address == NULL)
2041 {
2042 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2043 return EXIT_FAILURE;
2044 }
2045 }
2046 sender_address_forced = TRUE;
2047 }
2048 break;
2049
2050 /* This is some Sendmail thing which can be ignored */
2051
2052 case 'G':
2053 break;
2054
2055 /* -h: Set the hop count for an incoming message. Exim does not currently
2056 support this; it always computes it by counting the Received: headers.
2057 To put it in will require a change to the spool header file format. */
2058
2059 case 'h':
2060 if (*argrest == 0)
2061 {
2062 if(++i < argc) argrest = argv[i]; else
2063 { badarg = TRUE; break; }
2064 }
2065 if (!isdigit(*argrest)) badarg = TRUE;
2066 break;
2067
2068
2069 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2070 not to be documented for sendmail but mailx (at least) uses it) */
2071
2072 case 'i':
2073 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2074 break;
2075
2076
2077 case 'M':
2078 receiving_message = FALSE;
2079
2080 /* -MC: continue delivery of another message via an existing open
2081 file descriptor. This option is used for an internal call by the
2082 smtp transport when there is a pending message waiting to go to an
2083 address to which it has got a connection. Five subsequent arguments are
2084 required: transport name, host name, IP address, sequence number, and
2085 message_id. Transports may decline to create new processes if the sequence
2086 number gets too big. The channel is stdin. This (-MC) must be the last
2087 argument. There's a subsequent check that the real-uid is privileged.
2088
2089 If we are running in the test harness. delay for a bit, to let the process
2090 that set this one up complete. This makes for repeatability of the logging,
2091 etc. output. */
2092
2093 if (Ustrcmp(argrest, "C") == 0)
2094 {
41c7c167
PH
2095 union sockaddr_46 interface_sock;
2096 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2097
059ec3d9
PH
2098 if (argc != i + 6)
2099 {
2100 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2101 return EXIT_FAILURE;
2102 }
2103
2104 if (msg_action_arg >= 0)
2105 {
2106 fprintf(stderr, "exim: incompatible arguments\n");
2107 return EXIT_FAILURE;
2108 }
2109
2110 continue_transport = argv[++i];
2111 continue_hostname = argv[++i];
2112 continue_host_address = argv[++i];
2113 continue_sequence = Uatoi(argv[++i]);
2114 msg_action = MSG_DELIVER;
2115 msg_action_arg = ++i;
2116 forced_delivery = TRUE;
2117 queue_run_pid = passed_qr_pid;
2118 queue_run_pipe = passed_qr_pipe;
2119
2120 if (!mac_ismsgid(argv[i]))
2121 {
2122 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2123 argv[i]);
2124 return EXIT_FAILURE;
2125 }
2126
41c7c167
PH
2127 /* Set up $sending_ip_address and $sending_port */
2128
2129 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2130 &size) == 0)
2131 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2132 &sending_port);
2133 else
2134 {
2135 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2136 strerror(errno));
2137 return EXIT_FAILURE;
2138 }
2139
059ec3d9
PH
2140 if (running_in_test_harness) millisleep(500);
2141 break;
2142 }
2143
2144 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2145 precedes -MC (see above). The flag indicates that the host to which
2146 Exim is connected has accepted an AUTH sequence. */
2147
2148 else if (Ustrcmp(argrest, "CA") == 0)
2149 {
2150 smtp_authenticated = TRUE;
2151 break;
2152 }
2153
2154 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2155 it preceded -MC (see above) */
2156
2157 else if (Ustrcmp(argrest, "CP") == 0)
2158 {
2159 smtp_use_pipelining = TRUE;
2160 break;
2161 }
2162
2163 /* -MCQ: pass on the pid of the queue-running process that started
2164 this chain of deliveries and the fd of its synchronizing pipe; this
2165 is useful only when it precedes -MC (see above) */
2166
2167 else if (Ustrcmp(argrest, "CQ") == 0)
2168 {
2169 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2170 else badarg = TRUE;
2171 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2172 else badarg = TRUE;
2173 break;
2174 }
2175
2176 /* -MCS: set the smtp_use_size flag; this is useful only when it
2177 precedes -MC (see above) */
2178
2179 else if (Ustrcmp(argrest, "CS") == 0)
2180 {
2181 smtp_use_size = TRUE;
2182 break;
2183 }
2184
2185 /* -MCT: set the tls_offered flag; this is useful only when it
2186 precedes -MC (see above). The flag indicates that the host to which
2187 Exim is connected has offered TLS support. */
2188
2189 #ifdef SUPPORT_TLS
2190 else if (Ustrcmp(argrest, "CT") == 0)
2191 {
2192 tls_offered = TRUE;
2193 break;
2194 }
2195 #endif
2196
2197 /* -M[x]: various operations on the following list of message ids:
2198 -M deliver the messages, ignoring next retry times and thawing
2199 -Mc deliver the messages, checking next retry times, no thawing
2200 -Mf freeze the messages
2201 -Mg give up on the messages
2202 -Mt thaw the messages
2203 -Mrm remove the messages
2204 In the above cases, this must be the last option. There are also the
2205 following options which are followed by a single message id, and which
2206 act on that message. Some of them use the "recipient" addresses as well.
2207 -Mar add recipient(s)
2208 -Mmad mark all recipients delivered
2209 -Mmd mark recipients(s) delivered
2210 -Mes edit sender
0ef732d9 2211 -Mset load a message for use with -be
059ec3d9 2212 -Mvb show body
a96603a0 2213 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2214 -Mvh show header
2215 -Mvl show log
2216 */
2217
2218 else if (*argrest == 0)
2219 {
2220 msg_action = MSG_DELIVER;
2221 forced_delivery = deliver_force_thaw = TRUE;
2222 }
2223 else if (Ustrcmp(argrest, "ar") == 0)
2224 {
2225 msg_action = MSG_ADD_RECIPIENT;
2226 one_msg_action = TRUE;
2227 }
2228 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2229 else if (Ustrcmp(argrest, "es") == 0)
2230 {
2231 msg_action = MSG_EDIT_SENDER;
2232 one_msg_action = TRUE;
2233 }
2234 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2235 else if (Ustrcmp(argrest, "g") == 0)
2236 {
2237 msg_action = MSG_DELIVER;
2238 deliver_give_up = TRUE;
2239 }
2240 else if (Ustrcmp(argrest, "mad") == 0)
2241 {
2242 msg_action = MSG_MARK_ALL_DELIVERED;
2243 }
2244 else if (Ustrcmp(argrest, "md") == 0)
2245 {
2246 msg_action = MSG_MARK_DELIVERED;
2247 one_msg_action = TRUE;
2248 }
2249 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2250 else if (Ustrcmp(argrest, "set") == 0)
2251 {
2252 msg_action = MSG_LOAD;
2253 one_msg_action = TRUE;
2254 }
059ec3d9
PH
2255 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2256 else if (Ustrcmp(argrest, "vb") == 0)
2257 {
2258 msg_action = MSG_SHOW_BODY;
2259 one_msg_action = TRUE;
2260 }
a96603a0
PH
2261 else if (Ustrcmp(argrest, "vc") == 0)
2262 {
2263 msg_action = MSG_SHOW_COPY;
2264 one_msg_action = TRUE;
2265 }
059ec3d9
PH
2266 else if (Ustrcmp(argrest, "vh") == 0)
2267 {
2268 msg_action = MSG_SHOW_HEADER;
2269 one_msg_action = TRUE;
2270 }
2271 else if (Ustrcmp(argrest, "vl") == 0)
2272 {
2273 msg_action = MSG_SHOW_LOG;
2274 one_msg_action = TRUE;
2275 }
2276 else { badarg = TRUE; break; }
2277
2278 /* All the -Mxx options require at least one message id. */
2279
2280 msg_action_arg = i + 1;
2281 if (msg_action_arg >= argc)
2282 {
2283 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2284 return EXIT_FAILURE;
2285 }
2286
2287 /* Some require only message ids to follow */
2288
2289 if (!one_msg_action)
2290 {
2291 int j;
2292 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2293 {
2294 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2295 argv[j], arg);
2296 return EXIT_FAILURE;
2297 }
2298 goto END_ARG; /* Remaining args are ids */
2299 }
2300
2301 /* Others require only one message id, possibly followed by addresses,
2302 which will be handled as normal arguments. */
2303
2304 else
2305 {
2306 if (!mac_ismsgid(argv[msg_action_arg]))
2307 {
2308 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2309 argv[msg_action_arg], arg);
2310 return EXIT_FAILURE;
2311 }
2312 i++;
2313 }
2314 break;
2315
2316
2317 /* Some programs seem to call the -om option without the leading o;
2318 for sendmail it askes for "me too". Exim always does this. */
2319
2320 case 'm':
2321 if (*argrest != 0) badarg = TRUE;
2322 break;
2323
2324
2325 /* -N: don't do delivery - a debugging option that stops transports doing
2326 their thing. It implies debugging at the D_v level. */
2327
2328 case 'N':
2329 if (*argrest == 0)
2330 {
2331 dont_deliver = TRUE;
2332 debug_selector |= D_v;
2333 debug_file = stderr;
2334 }
2335 else badarg = TRUE;
2336 break;
2337
2338
2339 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2340 it. */
2341
2342 case 'n':
2343 break;
2344
2345 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2346 option to the specified value. This form uses long names. We need to handle
2347 -O option=value and -Ooption=value. */
2348
2349 case 'O':
2350 if (*argrest == 0)
2351 {
2352 if (++i >= argc)
2353 {
2354 fprintf(stderr, "exim: string expected after -O\n");
2355 exit(EXIT_FAILURE);
2356 }
2357 }
2358 break;
2359
2360 case 'o':
2361
2362 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2363 file" option). */
2364
2365 if (*argrest == 'A')
2366 {
2367 alias_arg = argrest + 1;
2368 if (alias_arg[0] == 0)
2369 {
2370 if (i+1 < argc) alias_arg = argv[++i]; else
2371 {
2372 fprintf(stderr, "exim: string expected after -oA\n");
2373 exit(EXIT_FAILURE);
2374 }
2375 }
2376 }
2377
2378 /* -oB: Set a connection message max value for remote deliveries */
2379
2380 else if (*argrest == 'B')
2381 {
2382 uschar *p = argrest + 1;
2383 if (p[0] == 0)
2384 {
2385 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2386 {
2387 connection_max_messages = 1;
2388 p = NULL;
2389 }
2390 }
2391
2392 if (p != NULL)
2393 {
2394 if (!isdigit(*p))
2395 {
2396 fprintf(stderr, "exim: number expected after -oB\n");
2397 exit(EXIT_FAILURE);
2398 }
2399 connection_max_messages = Uatoi(p);
2400 }
2401 }
2402
2403 /* -odb: background delivery */
2404
2405 else if (Ustrcmp(argrest, "db") == 0)
2406 {
2407 synchronous_delivery = FALSE;
2408 arg_queue_only = FALSE;
2409 queue_only_set = TRUE;
2410 }
2411
2412 /* -odf: foreground delivery (smail-compatible option); same effect as
2413 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2414 */
2415
2416 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2417 {
2418 synchronous_delivery = TRUE;
2419 arg_queue_only = FALSE;
2420 queue_only_set = TRUE;
2421 }
2422
2423 /* -odq: queue only */
2424
2425 else if (Ustrcmp(argrest, "dq") == 0)
2426 {
2427 synchronous_delivery = FALSE;
2428 arg_queue_only = TRUE;
2429 queue_only_set = TRUE;
2430 }
2431
2432 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2433 but no remote delivery */
2434
2435 else if (Ustrcmp(argrest, "dqs") == 0)
2436 {
2437 queue_smtp = TRUE;
2438 arg_queue_only = FALSE;
2439 queue_only_set = TRUE;
2440 }
2441
2442 /* -oex: Sendmail error flags. As these are also accepted without the
2443 leading -o prefix, for compatibility with vacation and other callers,
2444 they are handled with -e above. */
2445
2446 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2447 -oitrue: Another sendmail syntax for the same */
2448
2449 else if (Ustrcmp(argrest, "i") == 0 ||
2450 Ustrcmp(argrest, "itrue") == 0)
2451 dot_ends = FALSE;
2452
2453 /* -oM*: Set various characteristics for an incoming message; actually
2454 acted on for trusted callers only. */
2455
2456 else if (*argrest == 'M')
2457 {
2458 if (i+1 >= argc)
2459 {
2460 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2461 exit(EXIT_FAILURE);
2462 }
2463
2464 /* -oMa: Set sender host address */
2465
2466 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2467
2468 /* -oMaa: Set authenticator name */
2469
2470 else if (Ustrcmp(argrest, "Maa") == 0)
2471 sender_host_authenticated = argv[++i];
2472
2473 /* -oMas: setting authenticated sender */
2474
2475 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2476
2477 /* -oMai: setting authenticated id */
2478
2479 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2480
2481 /* -oMi: Set incoming interface address */
2482
2483 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2484
2485 /* -oMr: Received protocol */
2486
2487 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2488
2489 /* -oMs: Set sender host name */
2490
2491 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2492
2493 /* -oMt: Set sender ident */
2494
33d73e3b
PH
2495 else if (Ustrcmp(argrest, "Mt") == 0)
2496 {
2497 sender_ident_set = TRUE;
2498 sender_ident = argv[++i];
2499 }
059ec3d9
PH
2500
2501 /* Else a bad argument */
2502
2503 else
2504 {
2505 badarg = TRUE;
2506 break;
2507 }
2508 }
2509
2510 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2511 seem to call this as -m (undocumented), so that is also accepted (see
2512 above). */
2513
2514 else if (Ustrcmp(argrest, "m") == 0) {}
2515
2516 /* -oo: An ancient flag for old-style addresses which still seems to
2517 crop up in some calls (see in SCO). */
2518
2519 else if (Ustrcmp(argrest, "o") == 0) {}
2520
2521 /* -oP <name>: set pid file path for daemon */
2522
2523 else if (Ustrcmp(argrest, "P") == 0)
2524 override_pid_file_path = argv[++i];
2525
2526 /* -or <n>: set timeout for non-SMTP acceptance
2527 -os <n>: set timeout for SMTP acceptance */
2528
2529 else if (*argrest == 'r' || *argrest == 's')
2530 {
2531 int *tp = (*argrest == 'r')?
2532 &arg_receive_timeout : &arg_smtp_receive_timeout;
2533 if (argrest[1] == 0)
2534 {
2535 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2536 }
2537 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2538 if (*tp < 0)
2539 {
2540 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2541 exit(EXIT_FAILURE);
2542 }
2543 }
2544
2545 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2546
2547 else if (Ustrcmp(argrest, "X") == 0)
2548 override_local_interfaces = argv[++i];
2549
2550 /* Unknown -o argument */
2551
2552 else badarg = TRUE;
2553 break;
2554
2555
2556 /* -ps: force Perl startup; -pd force delayed Perl startup */
2557
2558 case 'p':
2559 #ifdef EXIM_PERL
2560 if (*argrest == 's' && argrest[1] == 0)
2561 {
2562 perl_start_option = 1;
2563 break;
2564 }
2565 if (*argrest == 'd' && argrest[1] == 0)
2566 {
2567 perl_start_option = -1;
2568 break;
2569 }
2570 #endif
2571
2572 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2573 which sets the host protocol and host name */
2574
2575 if (*argrest == 0)
2576 {
2577 if (i+1 < argc) argrest = argv[++i]; else
2578 { badarg = TRUE; break; }
2579 }
2580
2581 if (*argrest != 0)
2582 {
2583 uschar *hn = Ustrchr(argrest, ':');
2584 if (hn == NULL)
2585 {
2586 received_protocol = argrest;
2587 }
2588 else
2589 {
2590 received_protocol = string_copyn(argrest, hn - argrest);
2591 sender_host_name = hn + 1;
2592 }
2593 }
2594 break;
2595
2596
2597 case 'q':
2598 receiving_message = FALSE;
3cc66b45
PH
2599 if (queue_interval >= 0)
2600 {
2601 fprintf(stderr, "exim: -q specified more than once\n");
2602 exit(EXIT_FAILURE);
2603 }
059ec3d9
PH
2604
2605 /* -qq...: Do queue runs in a 2-stage manner */
2606
2607 if (*argrest == 'q')
2608 {
2609 queue_2stage = TRUE;
2610 argrest++;
2611 }
2612
2613 /* -qi...: Do only first (initial) deliveries */
2614
2615 if (*argrest == 'i')
2616 {
2617 queue_run_first_delivery = TRUE;
2618 argrest++;
2619 }
2620
2621 /* -qf...: Run the queue, forcing deliveries
2622 -qff..: Ditto, forcing thawing as well */
2623
2624 if (*argrest == 'f')
2625 {
2626 queue_run_force = TRUE;
2627 if (*(++argrest) == 'f')
2628 {
2629 deliver_force_thaw = TRUE;
2630 argrest++;
2631 }
2632 }
2633
2634 /* -q[f][f]l...: Run the queue only on local deliveries */
2635
2636 if (*argrest == 'l')
2637 {
2638 queue_run_local = TRUE;
2639 argrest++;
2640 }
2641
2642 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2643 optionally starting from a given message id. */
2644
2645 if (*argrest == 0 &&
2646 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2647 {
2648 queue_interval = 0;
2649 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2650 start_queue_run_id = argv[++i];
2651 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2652 stop_queue_run_id = argv[++i];
2653 }
2654
2655 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2656 optionally local only. */
2657
2658 else
2659 {
2660 if (*argrest != 0)
2661 queue_interval = readconf_readtime(argrest, 0, FALSE);
2662 else
2663 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2664 if (queue_interval <= 0)
2665 {
2666 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2667 exit(EXIT_FAILURE);
2668 }
2669 }
2670 break;
2671
2672
2673 case 'R': /* Synonymous with -qR... */
2674 receiving_message = FALSE;
2675
2676 /* -Rf: As -R (below) but force all deliveries,
2677 -Rff: Ditto, but also thaw all frozen messages,
2678 -Rr: String is regex
2679 -Rrf: Regex and force
2680 -Rrff: Regex and force and thaw
2681
2682 in all cases provided there are no further characters in this
2683 argument. */
2684
2685 if (*argrest != 0)
2686 {
2687 int i;
2688 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2689 {
2690 if (Ustrcmp(argrest, rsopts[i]) == 0)
2691 {
2692 if (i != 2) queue_run_force = TRUE;
2693 if (i >= 2) deliver_selectstring_regex = TRUE;
2694 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2695 argrest += Ustrlen(rsopts[i]);
2696 }
2697 }
2698 }
2699
2700 /* -R: Set string to match in addresses for forced queue run to
2701 pick out particular messages. */
2702
2703 if (*argrest == 0)
2704 {
2705 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2706 {
2707 fprintf(stderr, "exim: string expected after -R\n");
2708 exit(EXIT_FAILURE);
2709 }
2710 }
2711 else deliver_selectstring = argrest;
059ec3d9
PH
2712 break;
2713
2714
2715 /* -r: an obsolete synonym for -f (see above) */
2716
2717
2718 /* -S: Like -R but works on sender. */
2719
2720 case 'S': /* Synonymous with -qS... */
2721 receiving_message = FALSE;
2722
2723 /* -Sf: As -S (below) but force all deliveries,
2724 -Sff: Ditto, but also thaw all frozen messages,
2725 -Sr: String is regex
2726 -Srf: Regex and force
2727 -Srff: Regex and force and thaw
2728
2729 in all cases provided there are no further characters in this
2730 argument. */
2731
2732 if (*argrest != 0)
2733 {
2734 int i;
2735 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2736 {
2737 if (Ustrcmp(argrest, rsopts[i]) == 0)
2738 {
2739 if (i != 2) queue_run_force = TRUE;
2740 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2741 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2742 argrest += Ustrlen(rsopts[i]);
2743 }
2744 }
2745 }
2746
2747 /* -S: Set string to match in addresses for forced queue run to
2748 pick out particular messages. */
2749
2750 if (*argrest == 0)
2751 {
2752 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2753 {
2754 fprintf(stderr, "exim: string expected after -S\n");
2755 exit(EXIT_FAILURE);
2756 }
2757 }
2758 else deliver_selectstring_sender = argrest;
059ec3d9
PH
2759 break;
2760
2761 /* -Tqt is an option that is exclusively for use by the testing suite.
2762 It is not recognized in other circumstances. It allows for the setting up
2763 of explicit "queue times" so that various warning/retry things can be
2764 tested. Otherwise variability of clock ticks etc. cause problems. */
2765
2766 case 'T':
2767 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2768 fudged_queue_times = argv[++i];
2769 else badarg = TRUE;
2770 break;
2771
2772
2773 /* -t: Set flag to extract recipients from body of message. */
2774
2775 case 't':
2776 if (*argrest == 0) extract_recipients = TRUE;
2777
2778 /* -ti: Set flag to extract recipients from body of message, and also
2779 specify that dot does not end the message. */
2780
2781 else if (Ustrcmp(argrest, "i") == 0)
2782 {
2783 extract_recipients = TRUE;
2784 dot_ends = FALSE;
2785 }
2786
2787 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2788
2789 #ifdef SUPPORT_TLS
2790 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2791 #endif
2792
2793 else badarg = TRUE;
2794 break;
2795
2796
2797 /* -U: This means "initial user submission" in sendmail, apparently. The
2798 doc claims that in future sendmail may refuse syntactically invalid
2799 messages instead of fixing them. For the moment, we just ignore it. */
2800
2801 case 'U':
2802 break;
2803
2804
2805 /* -v: verify things - this is a very low-level debugging */
2806
2807 case 'v':
2808 if (*argrest == 0)
2809 {
2810 debug_selector |= D_v;
2811 debug_file = stderr;
2812 }
2813 else badarg = TRUE;
2814 break;
2815
2816
2817 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2818
2819 The -x flag tells the sendmail command that mail from a local
2820 mail program has National Language Support (NLS) extended characters
2821 in the body of the mail item. The sendmail command can send mail with
2822 extended NLS characters across networks that normally corrupts these
2823 8-bit characters.
2824
2825 As Exim is 8-bit clean, it just ignores this flag. */
2826
2827 case 'x':
2828 if (*argrest != 0) badarg = TRUE;
2829 break;
2830
2831 /* All other initial characters are errors */
2832
2833 default:
2834 badarg = TRUE;
2835 break;
2836 } /* End of high-level switch statement */
2837
2838 /* Failed to recognize the option, or syntax error */
2839
2840 if (badarg)
2841 {
2842 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2843 "option %s\n", arg);
2844 exit(EXIT_FAILURE);
2845 }
2846 }
2847
2848
3cc66b45
PH
2849/* If -R or -S have been specified without -q, assume a single queue run. */
2850
2851if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2852 queue_interval < 0) queue_interval = 0;
2853
2854
059ec3d9 2855END_ARG:
81ea09ca
NM
2856/* If usage_wanted is set we call the usage function - which never returns */
2857if (usage_wanted) exim_usage(called_as);
2858
2859/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
2860if ((
2861 (smtp_input || extract_recipients || recipients_arg < argc) &&
2862 (daemon_listen || queue_interval >= 0 || bi_option ||
2863 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 2864 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
2865 ) ||
2866 (
2867 msg_action_arg > 0 &&
0ef732d9
PH
2868 (daemon_listen || queue_interval >= 0 || list_options ||
2869 (checking && msg_action != MSG_LOAD) ||
2870 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
2871 ) ||
2872 (
2873 (daemon_listen || queue_interval >= 0) &&
2874 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 2875 bi_option)
059ec3d9
PH
2876 ) ||
2877 (
2878 daemon_listen && queue_interval == 0
2879 ) ||
2880 (
2881 list_options &&
2882 (checking || smtp_input || extract_recipients ||
f05da2e8 2883 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2884 ) ||
2885 (
2886 verify_address_mode &&
2887 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 2888 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2889 ) ||
2890 (
2891 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 2892 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2893 ) ||
2894 (
f05da2e8 2895 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
2896 extract_recipients)
2897 ) ||
2898 (
2899 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
2900 ) ||
2901 (
2902 msg_action == MSG_LOAD &&
2903 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
2904 )
2905 )
2906 {
2907 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2908 exit(EXIT_FAILURE);
2909 }
2910
2911/* If debugging is set up, set the file and the file descriptor to pass on to
2912child processes. It should, of course, be 2 for stderr. Also, force the daemon
2913to run in the foreground. */
2914
2915if (debug_selector != 0)
2916 {
2917 debug_file = stderr;
2918 debug_fd = fileno(debug_file);
2919 background_daemon = FALSE;
2920 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2921 if (debug_selector != D_v) /* -v only doesn't show this */
2922 {
2923 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2924 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2925 debug_selector);
2926 show_whats_supported(stderr);
2927 }
2928 }
2929
2930/* When started with root privilege, ensure that the limits on the number of
2931open files and the number of processes (where that is accessible) are
2932sufficiently large, or are unset, in case Exim has been called from an
2933environment where the limits are screwed down. Not all OS have the ability to
2934change some of these limits. */
2935
2936if (unprivileged)
2937 {
2938 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2939 }
2940else
2941 {
2942 struct rlimit rlp;
2943
2944 #ifdef RLIMIT_NOFILE
2945 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2946 {
2947 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2948 strerror(errno));
2949 rlp.rlim_cur = rlp.rlim_max = 0;
2950 }
eb2c0248
PH
2951
2952 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
2953 be exceeded. It turns out that some older OS have a fixed upper limit of
2954 256. */
eb2c0248 2955
059ec3d9
PH
2956 if (rlp.rlim_cur < 1000)
2957 {
2958 rlp.rlim_cur = rlp.rlim_max = 1000;
2959 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 2960 {
a494b1e1
PH
2961 rlp.rlim_cur = rlp.rlim_max = 256;
2962 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2963 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2964 strerror(errno));
eb2c0248 2965 }
059ec3d9
PH
2966 }
2967 #endif
2968
2969 #ifdef RLIMIT_NPROC
2970 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2971 {
2972 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2973 strerror(errno));
2974 rlp.rlim_cur = rlp.rlim_max = 0;
2975 }
2976
2977 #ifdef RLIM_INFINITY
2978 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2979 {
2980 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2981 #else
2982 if (rlp.rlim_cur < 1000)
2983 {
2984 rlp.rlim_cur = rlp.rlim_max = 1000;
2985 #endif
2986 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2987 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2988 strerror(errno));
2989 }
2990 #endif
2991 }
2992
2993/* Exim is normally entered as root (but some special configurations are
2994possible that don't do this). However, it always spins off sub-processes that
2995set their uid and gid as required for local delivery. We don't want to pass on
2996any extra groups that root may belong to, so we want to get rid of them all at
2997this point.
2998
2999We need to obey setgroups() at this stage, before possibly giving up root
3000privilege for a changed configuration file, but later on we might need to
3001check on the additional groups for the admin user privilege - can't do that
3002till after reading the config, which might specify the exim gid. Therefore,
3003save the group list here first. */
3004
3005group_count = getgroups(NGROUPS_MAX, group_list);
3006
3007/* There is a fundamental difference in some BSD systems in the matter of
3008groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3009known not to be different. On the "different" systems there is a single group
3010list, and the first entry in it is the current group. On all other versions of
3011Unix there is a supplementary group list, which is in *addition* to the current
3012group. Consequently, to get rid of all extraneous groups on a "standard" system
3013you pass over 0 groups to setgroups(), while on a "different" system you pass
3014over a single group - the current group, which is always the first group in the
3015list. Calling setgroups() with zero groups on a "different" system results in
3016an error return. The following code should cope with both types of system.
3017
3018However, if this process isn't running as root, setgroups() can't be used
3019since you have to be root to run it, even if throwing away groups. Not being
3020root here happens only in some unusual configurations. We just ignore the
3021error. */
3022
3023if (setgroups(0, NULL) != 0)
3024 {
3025 if (setgroups(1, group_list) != 0 && !unprivileged)
3026 {
3027 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3028 exit(EXIT_FAILURE);
3029 }
3030 }
3031
3032/* If the configuration file name has been altered by an argument on the
3033command line (either a new file name or a macro definition) and the caller is
cd25e41d
DW
3034not root, or if this is a filter testing run, remove any setuid privilege the
3035program has and run as the underlying user.
059ec3d9 3036
cd25e41d
DW
3037The exim user is locked out of this, which severely restricts the use of -C
3038for some purposes.
059ec3d9
PH
3039
3040Otherwise, set the real ids to the effective values (should be root unless run
3041from inetd, which it can either be root or the exim uid, if one is configured).
3042
3043There is a private mechanism for bypassing some of this, in order to make it
3044possible to test lots of configurations automatically, without having either to
3045recompile each time, or to patch in an actual configuration file name and other
3046values (such as the path name). If running in the test harness, pretend that
3047configuration file changes and macro definitions haven't happened. */
3048
3049if (( /* EITHER */
e2f5dc15 3050 (!trusted_config || macros != NULL) && /* Config changed, and */
059ec3d9 3051 real_uid != root_uid && /* Not root, and */
059ec3d9
PH
3052 !running_in_test_harness /* Not fudged */
3053 ) || /* OR */
3054 expansion_test /* expansion testing */
3055 || /* OR */
f05da2e8 3056 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3057 {
3058 setgroups(group_count, group_list);
3059 exim_setugid(real_uid, real_gid, FALSE,
3060 US"-C, -D, -be or -bf forces real uid");
3061 removed_privilege = TRUE;
3062
3063 /* In the normal case when Exim is called like this, stderr is available
3064 and should be used for any logging information because attempts to write
3065 to the log will usually fail. To arrange this, we unset really_exim. However,
3066 if no stderr is available there is no point - we might as well have a go
3067 at the log (if it fails, syslog will be written). */
3068
3069 if (log_stderr != NULL) really_exim = FALSE;
3070 }
3071
3072/* Privilege is to be retained for the moment. It may be dropped later,
3073depending on the job that this Exim process has been asked to do. For now, set
3074the real uid to the effective so that subsequent re-execs of Exim are done by a
3075privileged user. */
3076
3077else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3078
f05da2e8 3079/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3080setups and reading the message. */
3081
f05da2e8
PH
3082if ((filter_test & FTEST_SYSTEM) != 0)
3083 {
3084 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3085 if (filter_sfd < 0)
3086 {
3087 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3088 strerror(errno));
3089 return EXIT_FAILURE;
3090 }
3091 }
3092
3093if ((filter_test & FTEST_USER) != 0)
059ec3d9 3094 {
f05da2e8
PH
3095 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3096 if (filter_ufd < 0)
059ec3d9 3097 {
f05da2e8 3098 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3099 strerror(errno));
3100 return EXIT_FAILURE;
3101 }
3102 }
3103
3104/* Read the main runtime configuration data; this gives up if there
3105is a failure. It leaves the configuration file open so that the subsequent
3106configuration data for delivery can be read if needed. */
3107
3108readconf_main();
3109
3110/* Handle the decoding of logging options. */
3111
ed7f7860
PP
3112decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3113 log_selector_string, log_options, log_options_count, US"log", 0);
059ec3d9
PH
3114
3115DEBUG(D_any)
3116 {
3117 debug_printf("configuration file is %s\n", config_main_filename);
3118 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3119 log_extra_selector);
3120 }
3121
3122/* If domain literals are not allowed, check the sender address that was
3123supplied with -f. Ditto for a stripped trailing dot. */
3124
3125if (sender_address != NULL)
3126 {
3127 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3128 {
3129 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3130 "allowed\n", sender_address);
3131 return EXIT_FAILURE;
3132 }
3133 if (f_end_dot && !strip_trailing_dot)
3134 {
3135 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3136 "(trailing dot not allowed)\n", sender_address);
3137 return EXIT_FAILURE;
3138 }
3139 }
3140
3141/* Paranoia check of maximum lengths of certain strings. There is a check
3142on the length of the log file path in log.c, which will come into effect
3143if there are any calls to write the log earlier than this. However, if we
3144get this far but the string is very long, it is better to stop now than to
3145carry on and (e.g.) receive a message and then have to collapse. The call to
3146log_write() from here will cause the ultimate panic collapse if the complete
3147file name exceeds the buffer length. */
3148
3149if (Ustrlen(log_file_path) > 200)
3150 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3151 "log_file_path is longer than 200 chars: aborting");
3152
3153if (Ustrlen(pid_file_path) > 200)
3154 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3155 "pid_file_path is longer than 200 chars: aborting");
3156
3157if (Ustrlen(spool_directory) > 200)
3158 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3159 "spool_directory is longer than 200 chars: aborting");
3160
3161/* Length check on the process name given to syslog for its TAG field,
3162which is only permitted to be 32 characters or less. See RFC 3164. */
3163
3164if (Ustrlen(syslog_processname) > 32)
3165 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3166 "syslog_processname is longer than 32 chars: aborting");
3167
3168/* In some operating systems, the environment variable TMPDIR controls where
3169temporary files are created; Exim doesn't use these (apart from when delivering
3170to MBX mailboxes), but called libraries such as DBM libraries may require them.
3171If TMPDIR is found in the environment, reset it to the value defined in the
3172TMPDIR macro, if this macro is defined. */
3173
3174#ifdef TMPDIR
3175 {
3176 uschar **p;
3177 for (p = USS environ; *p != NULL; p++)
3178 {
3179 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3180 Ustrcmp(*p+7, TMPDIR) != 0)
3181 {
3182 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3183 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3184 *p = newp;
3185 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3186 }
3187 }
3188 }
3189#endif
3190
3191/* Timezone handling. If timezone_string is "utc", set a flag to cause all
3192timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3193we may need to get rid of a bogus timezone setting. This can arise when Exim is
3194called by a user who has set the TZ variable. This then affects the timestamps
3195in log files and in Received: headers, and any created Date: header lines. The
3196required timezone is settable in the configuration file, so nothing can be done
3197about this earlier - but hopefully nothing will normally be logged earlier than
3198this. We have to make a new environment if TZ is wrong, but don't bother if
3199timestamps_utc is set, because then all times are in UTC anyway. */
3200
3201if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3202 {
3203 timestamps_utc = TRUE;
3204 }
3205else
3206 {
3207 uschar *envtz = US getenv("TZ");
3208 if ((envtz == NULL && timezone_string != NULL) ||
3209 (envtz != NULL &&
3210 (timezone_string == NULL ||
3211 Ustrcmp(timezone_string, envtz) != 0)))
3212 {
3213 uschar **p = USS environ;
3214 uschar **new;
3215 uschar **newp;
3216 int count = 0;
3217 while (*p++ != NULL) count++;
3218 if (envtz == NULL) count++;
3219 newp = new = malloc(sizeof(uschar *) * (count + 1));
3220 for (p = USS environ; *p != NULL; p++)
3221 {
3222 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3223 *newp++ = *p;
3224 }
3225 if (timezone_string != NULL)
3226 {
3227 *newp = malloc(Ustrlen(timezone_string) + 4);
3228 sprintf(CS *newp++, "TZ=%s", timezone_string);
3229 }
3230 *newp = NULL;
3231 environ = CSS new;
3232 tzset();
3233 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3234 tod_stamp(tod_log));
3235 }
3236 }
3237
3238/* Handle the case when we have removed the setuid privilege because of -C or
cd25e41d 3239-D. This means that the caller of Exim was not root.
059ec3d9 3240
cd25e41d
DW
3241There is a problem if we were running as the Exim user. The sysadmin may
3242expect this case to retain privilege because "the binary was called by the
3243Exim user", but it hasn't, because either the -D option set macros, or the
3244-C option set a non-default configuration file. There are two possibilities:
059ec3d9
PH
3245
3246 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3247 to do message deliveries. Thus, the fact that it is running as a
3248 non-privileged user is plausible, and might be wanted in some special
3249 configurations. However, really_exim will have been set false when
3250 privilege was dropped, to stop Exim trying to write to its normal log
3251 files. Therefore, re-enable normal log processing, assuming the sysadmin
3252 has set up the log directory correctly.
3253
3254 (2) If deliver_drop_privilege is not set, the configuration won't work as
3255 apparently intended, and so we log a panic message. In order to retain
cd25e41d
DW
3256 root for -C or -D, the caller must be root (when deliver_drop_privilege
3257 is false). */
059ec3d9 3258
e2f5dc15 3259if (removed_privilege && (!trusted_config || macros != NULL) &&
059ec3d9
PH
3260 real_uid == exim_uid)
3261 {
059ec3d9
PH
3262 if (deliver_drop_privilege)
3263 really_exim = TRUE; /* let logging work normally */
3264 else
3265 log_write(0, LOG_MAIN|LOG_PANIC,
cd25e41d 3266 "exim user lost privilege for using %s option",
e2f5dc15 3267 (int)exim_uid, trusted_config? "-D" : "-C");
059ec3d9
PH
3268 }
3269
3270/* Start up Perl interpreter if Perl support is configured and there is a
3271perl_startup option, and the configuration or the command line specifies
3272initializing starting. Note that the global variables are actually called
3273opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3274
3275#ifdef EXIM_PERL
3276if (perl_start_option != 0)
3277 opt_perl_at_start = (perl_start_option > 0);
3278if (opt_perl_at_start && opt_perl_startup != NULL)
3279 {
3280 uschar *errstr;
3281 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3282 errstr = init_perl(opt_perl_startup);
3283 if (errstr != NULL)
3284 {
3285 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3286 return EXIT_FAILURE;
3287 }
3288 opt_perl_started = TRUE;
3289 }
3290#endif /* EXIM_PERL */
3291
3292/* Log the arguments of the call if the configuration file said so. This is
3293a debugging feature for finding out what arguments certain MUAs actually use.
3294Don't attempt it if logging is disabled, or if listing variables or if
3295verifying/testing addresses or expansions. */
3296
31619da6
PH
3297if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3298 && really_exim && !list_options && !checking)
059ec3d9
PH
3299 {
3300 int i;
3301 uschar *p = big_buffer;
3302 Ustrcpy(p, "cwd=");
3303 (void)getcwd(CS p+4, big_buffer_size - 4);
3304 while (*p) p++;
3305 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3306 while (*p) p++;
3307 for (i = 0; i < argc; i++)
3308 {
3309 int len = Ustrlen(argv[i]);
3310 uschar *printing;
3311 uschar *quote;
3312 if (p + len + 8 >= big_buffer + big_buffer_size)
3313 {
3314 Ustrcpy(p, " ...");
3315 log_write(0, LOG_MAIN, "%s", big_buffer);
3316 Ustrcpy(big_buffer, "...");
3317 p = big_buffer + 3;
3318 }
3319 printing = string_printing(argv[i]);
3320 if (printing[0] == 0) quote = US"\""; else
3321 {
3322 uschar *pp = printing;
3323 quote = US"";
3324 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3325 }
3326 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3327 (p - big_buffer) - 4), printing, quote);
3328 while (*p) p++;
3329 }
31619da6
PH
3330
3331 if ((log_extra_selector & LX_arguments) != 0)
3332 log_write(0, LOG_MAIN, "%s", big_buffer);
3333 else
3334 debug_printf("%s\n", big_buffer);
059ec3d9
PH
3335 }
3336
3337/* Set the working directory to be the top-level spool directory. We don't rely
3338on this in the code, which always uses fully qualified names, but it's useful
3339for core dumps etc. Don't complain if it fails - the spool directory might not
3340be generally accessible and calls with the -C option (and others) have lost
ba18e66a
PH
3341privilege by now. Before the chdir, we try to ensure that the directory exists.
3342*/
059ec3d9
PH
3343
3344if (Uchdir(spool_directory) != 0)
3345 {
ba18e66a 3346 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
059ec3d9
PH
3347 (void)Uchdir(spool_directory);
3348 }
3349
3350/* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3351alias file. Exim doesn't have such a concept, but this call is screwed into
3352Sun's YP makefiles. Handle this by calling a configured script, as the real
3353user who called Exim. The -oA option can be used to pass an argument to the
3354script. */
3355
3356if (bi_option)
3357 {
1fe64dcc 3358 (void)fclose(config_file);
059ec3d9
PH
3359 if (bi_command != NULL)
3360 {
3361 int i = 0;
3362 uschar *argv[3];
3363 argv[i++] = bi_command;
3364 if (alias_arg != NULL) argv[i++] = alias_arg;
3365 argv[i++] = NULL;
3366
3367 setgroups(group_count, group_list);
3368 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3369
3370 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3371 (argv[1] == NULL)? US"" : argv[1]);
3372
3373 execv(CS argv[0], (char *const *)argv);
3374 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3375 exit(EXIT_FAILURE);
3376 }
3377 else
3378 {
3379 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3380 exit(EXIT_SUCCESS);
3381 }
3382 }
3383
3384/* If an action on specific messages is requested, or if a daemon or queue
3385runner is being started, we need to know if Exim was called by an admin user.
3386This is the case if the real user is root or exim, or if the real group is
3387exim, or if one of the supplementary groups is exim or a group listed in
3388admin_groups. We don't fail all message actions immediately if not admin_user,
3389since some actions can be performed by non-admin users. Instead, set admin_user
3390for later interrogation. */
3391
3392if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3393 admin_user = TRUE;
3394else
3395 {
3396 int i, j;
059ec3d9
PH
3397 for (i = 0; i < group_count; i++)
3398 {
3399 if (group_list[i] == exim_gid) admin_user = TRUE;
3400 else if (admin_groups != NULL)
3401 {
3402 for (j = 1; j <= (int)(admin_groups[0]); j++)
3403 if (admin_groups[j] == group_list[i])
3404 { admin_user = TRUE; break; }
3405 }
3406 if (admin_user) break;
3407 }
3408 }
3409
3410/* Another group of privileged users are the trusted users. These are root,
3411exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3412are permitted to specify sender_addresses with -f on the command line, and
3413other message parameters as well. */
3414
3415if (real_uid == root_uid || real_uid == exim_uid)
3416 trusted_caller = TRUE;
3417else
3418 {
3419 int i, j;
3420
3421 if (trusted_users != NULL)
3422 {
3423 for (i = 1; i <= (int)(trusted_users[0]); i++)
3424 if (trusted_users[i] == real_uid)
3425 { trusted_caller = TRUE; break; }
3426 }
3427
3428 if (!trusted_caller && trusted_groups != NULL)
3429 {
3430 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3431 {
3432 if (trusted_groups[i] == real_gid)
3433 trusted_caller = TRUE;
3434 else for (j = 0; j < group_count; j++)
3435 {
3436 if (trusted_groups[i] == group_list[j])
3437 { trusted_caller = TRUE; break; }
3438 }
3439 if (trusted_caller) break;
3440 }
3441 }
3442 }
3443
3444if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3445if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3446
3447/* Only an admin user may start the daemon or force a queue run in the default
3448configuration, but the queue run restriction can be relaxed. Only an admin
3449user may request that a message be returned to its sender forthwith. Only an
3450admin user may specify a debug level greater than D_v (because it might show
3451passwords, etc. in lookup queries). Only an admin user may request a queue
8544e77a
PP
3452count. Only an admin user can use the test interface to scan for email
3453(because Exim will be in the spool dir and able to look at mails). */
059ec3d9
PH
3454
3455if (!admin_user)
3456 {
3457 BOOL debugset = (debug_selector & ~D_v) != 0;
8544e77a 3458 if (deliver_give_up || daemon_listen || malware_test_file ||
059ec3d9
PH
3459 (count_queue && queue_list_requires_admin) ||
3460 (list_queue && queue_list_requires_admin) ||
3461 (queue_interval >= 0 && prod_requires_admin) ||
3462 (debugset && !running_in_test_harness))
3463 {
3464 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3465 exit(EXIT_FAILURE);
3466 }
3467 }
3468
3469/* If the real user is not root or the exim uid, the argument for passing
3470in an open TCP/IP connection for another message is not permitted, nor is
3471running with the -N option for any delivery action, unless this call to exim is
3472one that supplied an input message, or we are using a patched exim for
3473regression testing. */
3474
3475if (real_uid != root_uid && real_uid != exim_uid &&
3476 (continue_hostname != NULL ||
3477 (dont_deliver &&
3478 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3479 )) && !running_in_test_harness)
3480 {
3481 fprintf(stderr, "exim: Permission denied\n");
3482 return EXIT_FAILURE;
3483 }
3484
3485/* If the caller is not trusted, certain arguments are ignored when running for
f05da2e8
PH
3486real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3487Note that authority for performing certain actions on messages is tested in the
059ec3d9
PH
3488queue_action() function. */
3489
f05da2e8 3490if (!trusted_caller && !checking && filter_test == FTEST_NONE)
059ec3d9
PH
3491 {
3492 sender_host_name = sender_host_address = interface_address =
3493 sender_ident = received_protocol = NULL;
3494 sender_host_port = interface_port = 0;
3495 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3496 }
3497
3498/* If a sender host address is set, extract the optional port number off the
3499end of it and check its syntax. Do the same thing for the interface address.
3500Exim exits if the syntax is bad. */
3501
3502else
3503 {
3504 if (sender_host_address != NULL)
3505 sender_host_port = check_port(sender_host_address);
3506 if (interface_address != NULL)
3507 interface_port = check_port(interface_address);
3508 }
3509
3510/* If an SMTP message is being received check to see if the standard input is a
3511TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3512caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3513barf. */
3514
3515if (smtp_input)
3516 {
3517 union sockaddr_46 inetd_sock;
36a3b041 3518 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
059ec3d9
PH
3519 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3520 {
3521 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3522 if (family == AF_INET || family == AF_INET6)
3523 {
3524 union sockaddr_46 interface_sock;
3525 size = sizeof(interface_sock);
3526
3527 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3528 interface_address = host_ntoa(-1, &interface_sock, NULL,
3529 &interface_port);
3530
3531 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3532
3533 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3534 {
3535 is_inetd = TRUE;
3536 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3537 NULL, &sender_host_port);
3538 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3539 "inetd is not supported when mua_wrapper is set");
3540 }
3541 else
3542 {
3543 fprintf(stderr,
3544 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3545 return EXIT_FAILURE;
3546 }
3547 }
3548 }
3549 }
3550
3551/* If the load average is going to be needed while receiving a message, get it
3552now for those OS that require the first call to os_getloadavg() to be done as
3553root. There will be further calls later for each message received. */
3554
3555#ifdef LOAD_AVG_NEEDS_ROOT
3556if (receiving_message &&
3557 (queue_only_load >= 0 ||
3558 (is_inetd && smtp_load_reserve >= 0)
3559 ))
3560 {
8669f003 3561 load_average = OS_GETLOADAVG();
059ec3d9
PH
3562 }
3563#endif
3564
3565/* The queue_only configuration option can be overridden by -odx on the command
3566line, except that if queue_only_override is false, queue_only cannot be unset
3567from the command line. */
3568
3569if (queue_only_set && (queue_only_override || arg_queue_only))
3570 queue_only = arg_queue_only;
3571
3572/* The receive_timeout and smtp_receive_timeout options can be overridden by
3573-or and -os. */
3574
3575if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3576if (arg_smtp_receive_timeout >= 0)
3577 smtp_receive_timeout = arg_smtp_receive_timeout;
3578
3579/* If Exim was started with root privilege, unless we have already removed the
3580root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3581except when starting the daemon or doing some kind of delivery or address
3582testing (-bt). These are the only cases when root need to be retained. We run
3583as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
805e5aab
TF
3584retained only for starting the daemon. We always do the initgroups() in this
3585situation (controlled by the TRUE below), in order to be as close as possible
3586to the state Exim usually runs in. */
059ec3d9
PH
3587
3588if (!unprivileged && /* originally had root AND */
3589 !removed_privilege && /* still got root AND */
3590 !daemon_listen && /* not starting the daemon */
3591 queue_interval <= 0 && /* (either kind of daemon) */
3592 ( /* AND EITHER */
3593 deliver_drop_privilege || /* requested unprivileged */
3594 ( /* OR */
3595 queue_interval < 0 && /* not running the queue */
3596 (msg_action_arg < 0 || /* and */
3597 msg_action != MSG_DELIVER) && /* not delivering and */
3598 (!checking || !address_test_mode) /* not address checking */
3599 )
3600 ))
3601 {
805e5aab 3602 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
059ec3d9
PH
3603 }
3604
3605/* When we are retaining a privileged uid, we still change to the exim gid. */
3606
3607else setgid(exim_gid);
3608
8544e77a
PP
3609/* Handle a request to scan a file for malware */
3610if (malware_test_file)
3611 {
dbc4b90d 3612#ifdef WITH_CONTENT_SCAN
8544e77a
PP
3613 int result;
3614 set_process_info("scanning file for malware");
3615 result = malware_in_file(malware_test_file);
3616 if (result == FAIL)
3617 {
3618 printf("No malware found.\n");
3619 exit(EXIT_SUCCESS);
3620 }
3621 if (result != OK)
3622 {
3623 printf("Malware lookup returned non-okay/fail: %d\n", result);
3624 exit(EXIT_FAILURE);
3625 }
3626 if (malware_name)
3627 printf("Malware found: %s\n", malware_name);
3628 else
3629 printf("Malware scan detected malware of unknown name.\n");
dbc4b90d
PP
3630#else
3631 printf("Malware scanning not enabled at compile time.\n");
3632#endif
8544e77a
PP
3633 exit(EXIT_FAILURE);
3634 }
3635
059ec3d9
PH
3636/* Handle a request to list the delivery queue */
3637
3638if (list_queue)
3639 {
3640 set_process_info("listing the queue");
3641 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3642 exit(EXIT_SUCCESS);
3643 }
3644
3645/* Handle a request to count the delivery queue */
3646
3647if (count_queue)
3648 {
3649 set_process_info("counting the queue");
3650 queue_count();
3651 exit(EXIT_SUCCESS);
3652 }
3653
0ef732d9
PH
3654/* Handle actions on specific messages, except for the force delivery and
3655message load actions, which are done below. Some actions take a whole list of
3656message ids, which are known to continue up to the end of the arguments. Others
3657take a single message id and then operate on the recipients list. */
059ec3d9 3658
0ef732d9 3659if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
059ec3d9
PH
3660 {
3661 int yield = EXIT_SUCCESS;
3662 set_process_info("acting on specified messages");
3663
3664 if (!one_msg_action)
3665 {
3666 for (i = msg_action_arg; i < argc; i++)
3667 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3668 yield = EXIT_FAILURE;
3669 }
3670
3671 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3672 recipients_arg)) yield = EXIT_FAILURE;
3673 exit(yield);
3674 }
3675
3676/* All the modes below here require the remaining configuration sections
3677to be read, except that we can skip over the ACL setting when delivering
3678specific messages, or doing a queue run. (For various testing cases we could
3679skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3680for skipping. */
3681
3682readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3683
3684/* The configuration data will have been read into POOL_PERM because we won't
3685ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3686this is just a bit of pedantic tidiness. It wouldn't really matter if the
3687configuration were read into POOL_MAIN, because we don't do any resets till
3688later on. However, it seems right, and it does ensure that both pools get used.
3689*/
3690
3691store_pool = POOL_MAIN;
3692
3693/* Handle the -brt option. This is for checking out retry configurations.
3694The next three arguments are a domain name or a complete address, and
3695optionally two error numbers. All it does is to call the function that
3696scans the retry configuration data. */
3697
3698if (test_retry_arg >= 0)
3699 {
3700 retry_config *yield;
3701 int basic_errno = 0;
3702 int more_errno = 0;
3703 uschar *s1, *s2;
3704
3705 if (test_retry_arg >= argc)
3706 {
3707 printf("-brt needs a domain or address argument\n");
3708 exim_exit(EXIT_FAILURE);
3709 }
3710 s1 = argv[test_retry_arg++];
3711 s2 = NULL;
3712
3713 /* If the first argument contains no @ and no . it might be a local user
3714 or it might be a single-component name. Treat as a domain. */
3715
3716 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3717 {
3718 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3719 "being \ntreated as a one-component domain, not as a local part.\n\n",
3720 s1);
3721 }
3722
3723 /* There may be an optional second domain arg. */
3724
3725 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3726 s2 = argv[test_retry_arg++];
3727
3728 /* The final arg is an error name */
3729
3730 if (test_retry_arg < argc)
3731 {
3732 uschar *ss = argv[test_retry_arg];
3733 uschar *error =
3734 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3735 if (error != NULL)
3736 {
3737 printf("%s\n", CS error);
3738 return EXIT_FAILURE;
3739 }
3740
e97957bc
PH
3741 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3742 code > 100 as an error is for matching codes to the decade. Turn them into
3743 a real error code, off the decade. */
059ec3d9 3744
e97957bc
PH
3745 if (basic_errno == ERRNO_MAIL4XX ||
3746 basic_errno == ERRNO_RCPT4XX ||
3747 basic_errno == ERRNO_DATA4XX)
059ec3d9
PH
3748 {
3749 int code = (more_errno >> 8) & 255;
3750 if (code == 255)
3751 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3752 else if (code > 100)
3753 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3754 }
3755 }
3756
3757 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3758 if (yield == NULL) printf("No retry information found\n"); else
3759 {
3760 retry_rule *r;
3761 more_errno = yield->more_errno;
3762 printf("Retry rule: %s ", yield->pattern);
3763
3764 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3765 {
3766 printf("quota%s%s ",
3767 (more_errno > 0)? "_" : "",
3768 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3769 }
3770 else if (yield->basic_errno == ECONNREFUSED)
3771 {
3772 printf("refused%s%s ",
3773 (more_errno > 0)? "_" : "",
3774 (more_errno == 'M')? "MX" :
3775 (more_errno == 'A')? "A" : "");
3776 }
3777 else if (yield->basic_errno == ETIMEDOUT)
3778 {
3779 printf("timeout");
3780 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3781 more_errno &= 255;
3782 if (more_errno != 0) printf("_%s",
3783 (more_errno == 'M')? "MX" : "A");
3784 printf(" ");
3785 }
3786 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3787 printf("auth_failed ");
3788 else printf("* ");
3789
3790 for (r = yield->rules; r != NULL; r = r->next)
3791 {
3792 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3793 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3794 if (r->rule == 'G')
3795 {
3796 int x = r->p2;
3797 int f = x % 1000;
3798 int d = 100;
3799 printf(",%d.", x/1000);
3800 do
3801 {
3802 printf("%d", f/d);
3803 f %= d;
3804 d /= 10;
3805 }
3806 while (f != 0);
3807 }
3808 printf("; ");
3809 }
3810
3811 printf("\n");
3812 }
3813 exim_exit(EXIT_SUCCESS);
3814 }
3815
3816/* Handle a request to list one or more configuration options */
3817
3818if (list_options)
3819 {
3820 set_process_info("listing variables");
3821 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3822 else for (i = recipients_arg; i < argc; i++)
3823 {
3824 if (i < argc - 1 &&
3825 (Ustrcmp(argv[i], "router") == 0 ||
3826 Ustrcmp(argv[i], "transport") == 0 ||
5d9c27ec
TK
3827 Ustrcmp(argv[i], "authenticator") == 0 ||
3828 Ustrcmp(argv[i], "macro") == 0))
059ec3d9
PH
3829 {
3830 readconf_print(argv[i+1], argv[i]);
3831 i++;
3832 }
3833 else readconf_print(argv[i], NULL);
3834 }
3835 exim_exit(EXIT_SUCCESS);
3836 }
3837
3838
3839/* Handle a request to deliver one or more messages that are already on the
0ef732d9
PH
3840queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3841above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3842
3843Delivery of specific messages is typically used for a small number when
3844prodding by hand (when the option forced_delivery will be set) or when
3845re-execing to regain root privilege. Each message delivery must happen in a
3846separate process, so we fork a process for each one, and run them sequentially
3847so that debugging output doesn't get intertwined, and to avoid spawning too
3848many processes if a long list is given. However, don't fork for the last one;
3849this saves a process in the common case when Exim is called to deliver just one
3850message. */
3851
3852if (msg_action_arg > 0 && msg_action != MSG_LOAD)
059ec3d9
PH
3853 {
3854 if (prod_requires_admin && !admin_user)
3855 {
3856 fprintf(stderr, "exim: Permission denied\n");
3857 exim_exit(EXIT_FAILURE);
3858 }
3859 set_process_info("delivering specified messages");
3860 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3861 for (i = msg_action_arg; i < argc; i++)
3862 {
3863 int status;
3864 pid_t pid;
3865 if (i == argc - 1)
3866 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3867 else if ((pid = fork()) == 0)
3868 {
3869 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3870 _exit(EXIT_SUCCESS);
3871 }
3872 else if (pid < 0)
3873 {
3874 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3875 strerror(errno));
3876 exim_exit(EXIT_FAILURE);
3877 }
3878 else wait(&status);
3879 }
3880 exim_exit(EXIT_SUCCESS);
3881 }
3882
3883
3884/* If only a single queue run is requested, without SMTP listening, we can just
3885turn into a queue runner, with an optional starting message id. */
3886
3887if (queue_interval == 0 && !daemon_listen)
3888 {
3889 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3890 (start_queue_run_id == NULL)? US"" : US" starting at ",
3891 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3892 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3893 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3894 set_process_info("running the queue (single queue run)");
3895 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3896 exim_exit(EXIT_SUCCESS);
3897 }
3898
3899
3900/* Find the login name of the real user running this process. This is always
3901needed when receiving a message, because it is written into the spool file. It
3902may also be used to construct a from: or a sender: header, and in this case we
3903need the user's full name as well, so save a copy of it, checked for RFC822
3904syntax and munged if necessary, if it hasn't previously been set by the -F
3905argument. We may try to get the passwd entry more than once, in case NIS or
3906other delays are in evidence. Save the home directory for use in filter testing
3907(only). */
3908
3909for (i = 0;;)
3910 {
3911 if ((pw = getpwuid(real_uid)) != NULL)
3912 {
3913 originator_login = string_copy(US pw->pw_name);
3914 originator_home = string_copy(US pw->pw_dir);
3915
3916 /* If user name has not been set by -F, set it from the passwd entry
3917 unless -f has been used to set the sender address by a trusted user. */
3918
3919 if (originator_name == NULL)
3920 {
3921 if (sender_address == NULL ||
f05da2e8 3922 (!trusted_caller && filter_test == FTEST_NONE))
059ec3d9
PH
3923 {
3924 uschar *name = US pw->pw_gecos;
3925 uschar *amp = Ustrchr(name, '&');
3926 uschar buffer[256];
3927
3928 /* Most Unix specify that a '&' character in the gecos field is
3929 replaced by a copy of the login name, and some even specify that
3930 the first character should be upper cased, so that's what we do. */
3931
3932 if (amp != NULL)
3933 {
3934 int loffset;
3935 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3936 amp - name, name, &loffset, originator_login, amp + 1);
3937 buffer[loffset] = toupper(buffer[loffset]);
3938 name = buffer;
3939 }
3940
3941 /* If a pattern for matching the gecos field was supplied, apply
3942 it and then expand the name string. */
3943
3944 if (gecos_pattern != NULL && gecos_name != NULL)
3945 {
3946 const pcre *re;
3947 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
3948
3949 if (regex_match_and_setup(re, name, 0, -1))
3950 {
3951 uschar *new_name = expand_string(gecos_name);
3952 expand_nmax = -1;
3953 if (new_name != NULL)
3954 {
3955 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
3956 "gecos field \"%s\"\n", new_name, name);
3957 name = new_name;
3958 }
3959 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
3960 "\"%s\": %s\n", gecos_name, expand_string_message);
3961 }
3962 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
3963 "gecos field \"%s\"\n", gecos_pattern, name);
3964 store_free((void *)re);
3965 }
3966 originator_name = string_copy(name);
3967 }
3968
3969 /* A trusted caller has used -f but not -F */
3970
3971 else originator_name = US"";
3972 }
3973
3974 /* Break the retry loop */
3975
3976 break;
3977 }
3978
3979 if (++i > finduser_retries) break;
3980 sleep(1);
3981 }
3982
3983/* If we cannot get a user login, log the incident and give up, unless the
3984configuration specifies something to use. When running in the test harness,
8800895a 3985any setting of unknown_login overrides the actual name. */
059ec3d9
PH
3986
3987if (originator_login == NULL || running_in_test_harness)
3988 {
3989 if (unknown_login != NULL)
3990 {
3991 originator_login = expand_string(unknown_login);
3992 if (originator_name == NULL && unknown_username != NULL)
3993 originator_name = expand_string(unknown_username);
3994 if (originator_name == NULL) originator_name = US"";
3995 }
3996 if (originator_login == NULL)
3997 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
3998 (int)real_uid);
3999 }
4000
4001/* Ensure that the user name is in a suitable form for use as a "phrase" in an
4002RFC822 address.*/
4003
4004originator_name = string_copy(parse_fix_phrase(originator_name,
4005 Ustrlen(originator_name), big_buffer, big_buffer_size));
4006
4007/* If a message is created by this call of Exim, the uid/gid of its originator
4008are those of the caller. These values are overridden if an existing message is
4009read in from the spool. */
4010
4011originator_uid = real_uid;
4012originator_gid = real_gid;
4013
4014DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4015 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4016
4017/* Run in daemon and/or queue-running mode. The function daemon_go() never
4018returns. We leave this till here so that the originator_ fields are available
47c7a64a
PH
4019for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4020mode. */
059ec3d9
PH
4021
4022if (daemon_listen || queue_interval > 0)
4023 {
47c7a64a
PH
4024 if (mua_wrapper)
4025 {
4026 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4027 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4028 "mua_wrapper is set");
4029 }
059ec3d9
PH
4030 daemon_go();
4031 }
4032
4033/* If the sender ident has not been set (by a trusted caller) set it to
4034the caller. This will get overwritten below for an inetd call. If a trusted
4035caller has set it empty, unset it. */
4036
4037if (sender_ident == NULL) sender_ident = originator_login;
4038 else if (sender_ident[0] == 0) sender_ident = NULL;
4039
4040/* Handle the -brw option, which is for checking out rewriting rules. Cause log
4041writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4042originator_* variables set. */
4043
4044if (test_rewrite_arg >= 0)
4045 {
4046 really_exim = FALSE;
4047 if (test_rewrite_arg >= argc)
4048 {
4049 printf("-brw needs an address argument\n");
4050 exim_exit(EXIT_FAILURE);
4051 }
4052 rewrite_test(argv[test_rewrite_arg]);
4053 exim_exit(EXIT_SUCCESS);
4054 }
4055
4056/* A locally-supplied message is considered to be coming from a local user
4057unless a trusted caller supplies a sender address with -f, or is passing in the
4058message via SMTP (inetd invocation or otherwise). */
4059
4060if ((sender_address == NULL && !smtp_input) ||
f05da2e8 4061 (!trusted_caller && filter_test == FTEST_NONE))
059ec3d9
PH
4062 {
4063 sender_local = TRUE;
4064
4065 /* A trusted caller can supply authenticated_sender and authenticated_id
33d73e3b
PH
4066 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4067 defaults except when host checking. */
059ec3d9 4068
33d73e3b 4069 if (authenticated_sender == NULL && !host_checking)
059ec3d9
PH
4070 authenticated_sender = string_sprintf("%s@%s", originator_login,
4071 qualify_domain_sender);
33d73e3b
PH
4072 if (authenticated_id == NULL && !host_checking)
4073 authenticated_id = originator_login;
059ec3d9
PH
4074 }
4075
4076/* Trusted callers are always permitted to specify the sender address.
4077Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4078is specified is the empty address. However, if a trusted caller does not
4079specify a sender address for SMTP input, we leave sender_address unset. This
4080causes the MAIL commands to be honoured. */
4081
4082if ((!smtp_input && sender_address == NULL) ||
4083 !receive_check_set_sender(sender_address))
4084 {
4085 /* Either the caller is not permitted to set a general sender, or this is
4086 non-SMTP input and the trusted caller h