Add support for setclassresources() in the pipe transport on FreeBSD,
[exim.git] / src / src / exim.c
CommitLineData
929ba01c 1/* $Cambridge: exim/src/src/exim.c,v 1.34 2006/02/21 16:24:19 ph10 Exp $ */
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2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
d7d7b7b9 7/* Copyright (c) University of Cambridge 1995 - 2006 */
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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/*************************************************
379* Ensure stdin, stdout, and stderr exist *
380*************************************************/
381
382/* Some operating systems grumble if an exec() happens without a standard
383input, output, and error (fds 0, 1, 2) being defined. The worry is that some
384file will be opened and will use these fd values, and then some other bit of
385code will assume, for example, that it can write error messages to stderr.
386This function ensures that fds 0, 1, and 2 are open if they do not already
387exist, by connecting them to /dev/null.
388
389This function is also used to ensure that std{in,out,err} exist at all times,
390so that if any library that Exim calls tries to use them, it doesn't crash.
391
392Arguments: None
393Returns: Nothing
394*/
395
396void
397exim_nullstd(void)
398{
399int i;
400int devnull = -1;
401struct stat statbuf;
402for (i = 0; i <= 2; i++)
403 {
404 if (fstat(i, &statbuf) < 0 && errno == EBADF)
405 {
406 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
407 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
408 string_open_failed(errno, "/dev/null"));
1fe64dcc 409 if (devnull != i) (void)dup2(devnull, i);
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410 }
411 }
1fe64dcc 412if (devnull > 2) (void)close(devnull);
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413}
414
415
416
417
418/*************************************************
419* Close unwanted file descriptors for delivery *
420*************************************************/
421
422/* This function is called from a new process that has been forked to deliver
423an incoming message, either directly, or using exec.
424
425We want any smtp input streams to be closed in this new process. However, it
426has been observed that using fclose() here causes trouble. When reading in -bS
427input, duplicate copies of messages have been seen. The files will be sharing a
428file pointer with the parent process, and it seems that fclose() (at least on
429some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
430least sometimes. Hence we go for closing the underlying file descriptors.
431
432If TLS is active, we want to shut down the TLS library, but without molesting
433the parent's SSL connection.
434
435For delivery of a non-SMTP message, we want to close stdin and stdout (and
436stderr unless debugging) because the calling process might have set them up as
437pipes and be waiting for them to close before it waits for the submission
438process to terminate. If they aren't closed, they hold up the calling process
439until the initial delivery process finishes, which is not what we want.
440
441Exception: We do want it for synchronous delivery!
442
443And notwithstanding all the above, if D_resolver is set, implying resolver
444debugging, leave stdout open, because that's where the resolver writes its
445debugging output.
446
447When we close stderr (which implies we've also closed stdout), we also get rid
448of any controlling terminal.
449
450Arguments: None
451Returns: Nothing
452*/
453
454static void
455close_unwanted(void)
456{
457if (smtp_input)
458 {
459 #ifdef SUPPORT_TLS
460 tls_close(FALSE); /* Shut down the TLS library */
461 #endif
1fe64dcc
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462 (void)close(fileno(smtp_in));
463 (void)close(fileno(smtp_out));
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464 smtp_in = NULL;
465 }
466else
467 {
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468 (void)close(0); /* stdin */
469 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
470 if (debug_selector == 0) /* stderr */
059ec3d9
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471 {
472 if (!synchronous_delivery)
473 {
1fe64dcc 474 (void)close(2);
059ec3d9
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475 log_stderr = NULL;
476 }
477 (void)setsid();
478 }
479 }
480}
481
482
483
484
485/*************************************************
486* Set uid and gid *
487*************************************************/
488
489/* This function sets a new uid and gid permanently, optionally calling
490initgroups() to set auxiliary groups. There are some special cases when running
491Exim in unprivileged modes. In these situations the effective uid will not be
492root; if we already have the right effective uid/gid, and don't need to
493initialize any groups, leave things as they are.
494
495Arguments:
496 uid the uid
497 gid the gid
498 igflag TRUE if initgroups() wanted
499 msg text to use in debugging output and failure log
500
501Returns: nothing; bombs out on failure
502*/
503
504void
505exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
506{
507uid_t euid = geteuid();
508gid_t egid = getegid();
509
510if (euid == root_uid || euid != uid || egid != gid || igflag)
511 {
512 /* At least one OS returns +1 for initgroups failure, so just check for
513 non-zero. */
514
515 if (igflag)
516 {
517 struct passwd *pw = getpwuid(uid);
518 if (pw != NULL)
519 {
520 if (initgroups(pw->pw_name, gid) != 0)
521 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
522 (long int)uid, strerror(errno));
523 }
524 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
525 "no passwd entry for uid=%ld", (long int)uid);
526 }
527
528 if (setgid(gid) < 0 || setuid(uid) < 0)
529 {
530 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
531 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
532 }
533 }
534
535/* Debugging output included uid/gid and all groups */
536
537DEBUG(D_uid)
538 {
539 int group_count;
540 gid_t group_list[NGROUPS_MAX];
541 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
542 (long int)geteuid(), (long int)getegid(), (long int)getpid());
543 group_count = getgroups(NGROUPS_MAX, group_list);
544 debug_printf(" auxiliary group list:");
545 if (group_count > 0)
546 {
547 int i;
548 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
549 }
550 else debug_printf(" <none>");
551 debug_printf("\n");
552 }
553}
554
555
556
557
558/*************************************************
559* Exit point *
560*************************************************/
561
562/* Exim exits via this function so that it always clears up any open
563databases.
564
565Arguments:
566 rc return code
567
568Returns: does not return
569*/
570
571void
572exim_exit(int rc)
573{
574search_tidyup();
575DEBUG(D_any)
576 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
577 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
578exit(rc);
579}
580
581
582
583
584/*************************************************
585* Extract port from host address *
586*************************************************/
587
588/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
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589It also checks the syntax of the address, and terminates it before the
590port data when a port is extracted.
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591
592Argument:
593 address the address, with possible port on the end
594
595Returns: the port, or zero if there isn't one
596 bombs out on a syntax error
597*/
598
599static int
600check_port(uschar *address)
601{
7cd1141b 602int port = host_address_extract_port(address);
8e669ac1 603if (string_is_ip_address(address, NULL) == 0)
059ec3d9
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604 {
605 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
606 exit(EXIT_FAILURE);
607 }
608return port;
609}
610
611
612
613/*************************************************
614* Test/verify an address *
615*************************************************/
616
617/* This function is called by the -bv and -bt code. It extracts a working
618address from a full RFC 822 address. This isn't really necessary per se, but it
619has the effect of collapsing source routes.
620
621Arguments:
622 s the address string
623 flags flag bits for verify_address()
624 exit_value to be set for failures
625
a5a28604 626Returns: nothing
059ec3d9
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627*/
628
629static void
630test_address(uschar *s, int flags, int *exit_value)
631{
632int start, end, domain;
633uschar *parse_error = NULL;
634uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
635 FALSE);
636if (address == NULL)
637 {
638 fprintf(stdout, "syntax error: %s\n", parse_error);
639 *exit_value = 2;
640 }
641else
642 {
643 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 644 -1, -1, NULL, NULL, NULL);
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645 if (rc == FAIL) *exit_value = 2;
646 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
647 }
648}
649
650
651
652/*************************************************
653* Decode bit settings for log/debug *
654*************************************************/
655
656/* This function decodes a string containing bit settings in the form of +name
657and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
658also recognizes a numeric setting of the form =<number>, but this is not
659intended for user use. It's an easy way for Exim to pass the debug settings
660when it is re-exec'ed.
661
662The log options are held in two unsigned ints (because there became too many
663for one). The top bit in the table means "put in 2nd selector". This does not
664yet apply to debug options, so the "=" facility sets only the first selector.
665
1fe64dcc
PH
666The "all" selector, which must be equal to 0xffffffff, is recognized specially.
667It sets all the bits in both selectors. However, there is a facility for then
668unsetting certain bits, because we want to turn off "memory" in the debug case.
669
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670A bad value for a debug setting is treated as an unknown option - error message
671to stderr and die. For log settings, which come from the configuration file,
672we write to the log on the way out...
673
674Arguments:
675 selector1 address of the first bit string
676 selector2 address of the second bit string, or NULL
1fe64dcc
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677 notall1 bits to exclude from "all" for selector1
678 notall2 bits to exclude from "all" for selector2
059ec3d9
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679 string the configured string
680 options the table of option names
681 count size of table
682 which "log" or "debug"
683
684Returns: nothing on success - bomb out on failure
685*/
686
687static void
1fe64dcc
PH
688decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
689 int notall2, uschar *string, bit_table *options, int count, uschar *which)
059ec3d9
PH
690{
691uschar *errmsg;
692if (string == NULL) return;
693
694if (*string == '=')
695 {
696 char *end; /* Not uschar */
697 *selector1 = strtoul(CS string+1, &end, 0);
698 if (*end == 0) return;
699 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
700 string);
701 goto ERROR_RETURN;
702 }
703
704/* Handle symbolic setting */
705
706else for(;;)
707 {
708 BOOL adding;
709 uschar *s;
710 int len;
711 bit_table *start, *end;
712
713 while (isspace(*string)) string++;
714 if (*string == 0) return;
715
716 if (*string != '+' && *string != '-')
717 {
718 errmsg = string_sprintf("malformed %s_selector setting: "
719 "+ or - expected but found \"%s\"", which, string);
720 goto ERROR_RETURN;
721 }
722
723 adding = *string++ == '+';
724 s = string;
725 while (isalnum(*string) || *string == '_') string++;
726 len = string - s;
727
728 start = options;
729 end = options + count;
730
731 while (start < end)
732 {
733 bit_table *middle = start + (end - start)/2;
734 int c = Ustrncmp(s, middle->name, len);
735 if (c == 0)
736 {
737 if (middle->name[len] != 0) c = -1; else
738 {
739 unsigned int bit = middle->bit;
740 unsigned int *selector;
741
1fe64dcc 742 /* The value with all bits set means "force all bits in both selectors"
059ec3d9 743 in the case where two are being handled. However, the top bit in the
1fe64dcc
PH
744 second selector is never set. When setting, some bits can be excluded.
745 */
059ec3d9
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746
747 if (bit == 0xffffffff)
748 {
1fe64dcc
PH
749 if (adding)
750 {
751 *selector1 = 0xffffffff ^ notall1;
752 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
753 }
754 else
755 {
756 *selector1 = 0;
757 if (selector2 != NULL) *selector2 = 0;
758 }
059ec3d9
PH
759 }
760
761 /* Otherwise, the 0x80000000 bit means "this value, without the top
762 bit, belongs in the second selector". */
763
764 else
765 {
766 if ((bit & 0x80000000) != 0)
767 {
768 selector = selector2;
769 bit &= 0x7fffffff;
770 }
771 else selector = selector1;
772 if (adding) *selector |= bit; else *selector &= ~bit;
773 }
774 break; /* Out of loop to match selector name */
775 }
776 }
777 if (c < 0) end = middle; else start = middle + 1;
778 } /* Loop to match selector name */
779
780 if (start >= end)
781 {
782 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
783 adding? '+' : '-', len, s);
784 goto ERROR_RETURN;
785 }
786 } /* Loop for selector names */
787
788/* Handle disasters */
789
790ERROR_RETURN:
791if (Ustrcmp(which, "debug") == 0)
792 {
793 fprintf(stderr, "exim: %s\n", errmsg);
794 exit(EXIT_FAILURE);
795 }
796else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
797}
798
799
800
801/*************************************************
802* Show supported features *
803*************************************************/
804
805/* This function is called for -bV and for -d to output the optional features
806of the current Exim binary.
807
808Arguments: a FILE for printing
809Returns: nothing
810*/
811
812static void
813show_whats_supported(FILE *f)
814{
815#ifdef DB_VERSION_STRING
816fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
817#elif defined(BTREEVERSION) && defined(HASHVERSION)
818 #ifdef USE_DB
819 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
820 #else
821 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
822 #endif
823#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
824fprintf(f, "Probably ndbm\n");
825#elif defined(USE_TDB)
826fprintf(f, "Using tdb\n");
827#else
828 #ifdef USE_GDBM
829 fprintf(f, "Probably GDBM (native mode)\n");
830 #else
831 fprintf(f, "Probably GDBM (compatibility mode)\n");
832 #endif
833#endif
834
835fprintf(f, "Support for:");
9cec981f
PH
836#ifdef SUPPORT_CRYPTEQ
837 fprintf(f, " crypteq");
838#endif
059ec3d9
PH
839#if HAVE_ICONV
840 fprintf(f, " iconv()");
841#endif
842#if HAVE_IPV6
843 fprintf(f, " IPv6");
844#endif
929ba01c
PH
845#ifdef HAVE_LOGIN_CAP
846 fprintf(f, " use_classresources");
847#endif
059ec3d9
PH
848#ifdef SUPPORT_PAM
849 fprintf(f, " PAM");
850#endif
851#ifdef EXIM_PERL
852 fprintf(f, " Perl");
853#endif
1a46a8c5
PH
854#ifdef EXPAND_DLFUNC
855 fprintf(f, " Expand_dlfunc");
856#endif
059ec3d9
PH
857#ifdef USE_TCP_WRAPPERS
858 fprintf(f, " TCPwrappers");
859#endif
860#ifdef SUPPORT_TLS
861 #ifdef USE_GNUTLS
862 fprintf(f, " GnuTLS");
863 #else
864 fprintf(f, " OpenSSL");
865 #endif
866#endif
b2f5a032
PH
867#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
868 fprintf(f, " translate_ip_address");
869#endif
f174f16e
PH
870#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
871 fprintf(f, " move_frozen_messages");
872#endif
8523533c
TK
873#ifdef WITH_CONTENT_SCAN
874 fprintf(f, " Content_Scanning");
875#endif
876#ifdef WITH_OLD_DEMIME
877 fprintf(f, " Old_Demime");
878#endif
879#ifdef EXPERIMENTAL_SPF
880 fprintf(f, " Experimental_SPF");
881#endif
882#ifdef EXPERIMENTAL_SRS
883 fprintf(f, " Experimental_SRS");
884#endif
885#ifdef EXPERIMENTAL_BRIGHTMAIL
886 fprintf(f, " Experimental_Brightmail");
887#endif
fb2274d4
TK
888#ifdef EXPERIMENTAL_DOMAINKEYS
889 fprintf(f, " Experimental_DomainKeys");
890#endif
059ec3d9
PH
891fprintf(f, "\n");
892
893fprintf(f, "Lookups:");
894#ifdef LOOKUP_LSEARCH
895 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
896#endif
897#ifdef LOOKUP_CDB
898 fprintf(f, " cdb");
899#endif
900#ifdef LOOKUP_DBM
901 fprintf(f, " dbm dbmnz");
902#endif
903#ifdef LOOKUP_DNSDB
904 fprintf(f, " dnsdb");
905#endif
906#ifdef LOOKUP_DSEARCH
907 fprintf(f, " dsearch");
908#endif
909#ifdef LOOKUP_IBASE
910 fprintf(f, " ibase");
911#endif
912#ifdef LOOKUP_LDAP
913 fprintf(f, " ldap ldapdn ldapm");
914#endif
915#ifdef LOOKUP_MYSQL
916 fprintf(f, " mysql");
917#endif
918#ifdef LOOKUP_NIS
919 fprintf(f, " nis nis0");
920#endif
921#ifdef LOOKUP_NISPLUS
922 fprintf(f, " nisplus");
923#endif
924#ifdef LOOKUP_ORACLE
925 fprintf(f, " oracle");
926#endif
927#ifdef LOOKUP_PASSWD
928 fprintf(f, " passwd");
929#endif
930#ifdef LOOKUP_PGSQL
931 fprintf(f, " pgsql");
932#endif
13b685f9
PH
933#ifdef LOOKUP_SQLITE
934 fprintf(f, " sqlite");
935#endif
059ec3d9
PH
936#ifdef LOOKUP_TESTDB
937 fprintf(f, " testdb");
938#endif
939#ifdef LOOKUP_WHOSON
940 fprintf(f, " whoson");
941#endif
942fprintf(f, "\n");
943
944fprintf(f, "Authenticators:");
945#ifdef AUTH_CRAM_MD5
946 fprintf(f, " cram_md5");
947#endif
948#ifdef AUTH_CYRUS_SASL
949 fprintf(f, " cyrus_sasl");
950#endif
951#ifdef AUTH_PLAINTEXT
952 fprintf(f, " plaintext");
953#endif
954#ifdef AUTH_SPA
955 fprintf(f, " spa");
956#endif
957fprintf(f, "\n");
958
959fprintf(f, "Routers:");
960#ifdef ROUTER_ACCEPT
961 fprintf(f, " accept");
962#endif
963#ifdef ROUTER_DNSLOOKUP
964 fprintf(f, " dnslookup");
965#endif
966#ifdef ROUTER_IPLITERAL
967 fprintf(f, " ipliteral");
968#endif
969#ifdef ROUTER_IPLOOKUP
970 fprintf(f, " iplookup");
971#endif
972#ifdef ROUTER_MANUALROUTE
973 fprintf(f, " manualroute");
974#endif
975#ifdef ROUTER_QUERYPROGRAM
976 fprintf(f, " queryprogram");
977#endif
978#ifdef ROUTER_REDIRECT
979 fprintf(f, " redirect");
980#endif
981fprintf(f, "\n");
982
983fprintf(f, "Transports:");
984#ifdef TRANSPORT_APPENDFILE
985 fprintf(f, " appendfile");
986 #ifdef SUPPORT_MAILDIR
987 fprintf(f, "/maildir");
988 #endif
989 #ifdef SUPPORT_MAILSTORE
990 fprintf(f, "/mailstore");
991 #endif
992 #ifdef SUPPORT_MBX
993 fprintf(f, "/mbx");
994 #endif
995#endif
996#ifdef TRANSPORT_AUTOREPLY
997 fprintf(f, " autoreply");
998#endif
999#ifdef TRANSPORT_LMTP
1000 fprintf(f, " lmtp");
1001#endif
1002#ifdef TRANSPORT_PIPE
1003 fprintf(f, " pipe");
1004#endif
1005#ifdef TRANSPORT_SMTP
1006 fprintf(f, " smtp");
1007#endif
1008fprintf(f, "\n");
1009
1010if (fixed_never_users[0] > 0)
1011 {
1012 int i;
1013 fprintf(f, "Fixed never_users: ");
1014 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1015 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1016 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1017 }
21c28500
PH
1018
1019fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
059ec3d9
PH
1020}
1021
1022
1023
1024
1025/*************************************************
1026* Quote a local part *
1027*************************************************/
1028
1029/* This function is used when a sender address or a From: or Sender: header
1030line is being created from the caller's login, or from an authenticated_id. It
1031applies appropriate quoting rules for a local part.
1032
1033Argument: the local part
1034Returns: the local part, quoted if necessary
1035*/
1036
1037uschar *
1038local_part_quote(uschar *lpart)
1039{
1040BOOL needs_quote = FALSE;
1041int size, ptr;
1042uschar *yield;
1043uschar *t;
1044
1045for (t = lpart; !needs_quote && *t != 0; t++)
1046 {
1047 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1048 (*t != '.' || t == lpart || t[1] == 0);
1049 }
1050
1051if (!needs_quote) return lpart;
1052
1053size = ptr = 0;
1054yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1055
1056for (;;)
1057 {
1058 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1059 if (nq == NULL)
1060 {
1061 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1062 break;
1063 }
1064 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1065 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1066 yield = string_cat(yield, &size, &ptr, nq, 1);
1067 lpart = nq + 1;
1068 }
1069
1070yield = string_cat(yield, &size, &ptr, US"\"", 1);
1071yield[ptr] = 0;
1072return yield;
1073}
1074
1075
1076
1077#ifdef USE_READLINE
1078/*************************************************
1079* Load readline() functions *
1080*************************************************/
1081
1082/* This function is called from testing executions that read data from stdin,
1083but only when running as the calling user. Currently, only -be does this. The
1084function loads the readline() function library and passes back the functions.
1085On some systems, it needs the curses library, so load that too, but try without
1086it if loading fails. All this functionality has to be requested at build time.
1087
1088Arguments:
1089 fn_readline_ptr pointer to where to put the readline pointer
1090 fn_addhist_ptr pointer to where to put the addhistory function
1091
1092Returns: the dlopen handle or NULL on failure
1093*/
1094
1095static void *
1096set_readline(char * (**fn_readline_ptr)(char *),
1097 char * (**fn_addhist_ptr)(char *))
1098{
1099void *dlhandle;
1100void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1101
1102dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1103if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1104
1105if (dlhandle != NULL)
1106 {
1107 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1108 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1109 }
1110else
1111 {
1112 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1113 }
1114
1115return dlhandle;
1116}
1117#endif
1118
1119
1120
1121/*************************************************
1122* Get a line from stdin for testing things *
1123*************************************************/
1124
1125/* This function is called when running tests that can take a number of lines
1126of input (for example, -be and -bt). It handles continuations and trailing
1127spaces. And prompting and a blank line output on eof. If readline() is in use,
1128the arguments are non-NULL and provide the relevant functions.
1129
1130Arguments:
1131 fn_readline readline function or NULL
1132 fn_addhist addhist function or NULL
1133
1134Returns: pointer to dynamic memory, or NULL at end of file
1135*/
1136
1137static uschar *
1138get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1139{
1140int i;
1141int size = 0;
1142int ptr = 0;
1143uschar *yield = NULL;
1144
1145if (fn_readline == NULL) printf("> ");
1146
1147for (i = 0;; i++)
1148 {
1149 uschar buffer[1024];
1150 uschar *p, *ss;
1151
1152 #ifdef USE_READLINE
1153 char *readline_line = NULL;
1154 if (fn_readline != NULL)
1155 {
1156 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1157 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1158 p = US readline_line;
1159 }
1160 else
1161 #endif
1162
1163 /* readline() not in use */
1164
1165 {
1166 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1167 p = buffer;
1168 }
1169
1170 /* Handle the line */
1171
1172 ss = p + (int)Ustrlen(p);
1173 while (ss > p && isspace(ss[-1])) ss--;
1174
1175 if (i > 0)
1176 {
1177 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1178 }
1179
1180 yield = string_cat(yield, &size, &ptr, p, ss - p);
1181
1182 #ifdef USE_READLINE
1183 if (fn_readline != NULL) free(readline_line);
1184 #endif
1185
1186 if (ss == p || yield[ptr-1] != '\\')
1187 {
1188 yield[ptr] = 0;
1189 break;
1190 }
1191 yield[--ptr] = 0;
1192 }
1193
1194if (yield == NULL) printf("\n");
1195return yield;
1196}
1197
1198
1199
1200/*************************************************
1201* Entry point and high-level code *
1202*************************************************/
1203
1204/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1205the appropriate action. All the necessary functions are present in the one
1206binary. I originally thought one should split it up, but it turns out that so
1207much of the apparatus is needed in each chunk that one might as well just have
1208it all available all the time, which then makes the coding easier as well.
1209
1210Arguments:
1211 argc count of entries in argv
1212 argv argument strings, with argv[0] being the program name
1213
1214Returns: EXIT_SUCCESS if terminated successfully
1215 EXIT_FAILURE otherwise, except when a message has been sent
1216 to the sender, and -oee was given
1217*/
1218
1219int
1220main(int argc, char **cargv)
1221{
1222uschar **argv = USS cargv;
1223int arg_receive_timeout = -1;
1224int arg_smtp_receive_timeout = -1;
1225int arg_error_handling = error_handling;
f05da2e8
PH
1226int filter_sfd = -1;
1227int filter_ufd = -1;
059ec3d9
PH
1228int group_count;
1229int i;
1230int list_queue_option = 0;
1231int msg_action = 0;
1232int msg_action_arg = -1;
1233int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1234int queue_only_reason = 0;
1235#ifdef EXIM_PERL
1236int perl_start_option = 0;
1237#endif
1238int recipients_arg = argc;
1239int sender_address_domain = 0;
1240int test_retry_arg = -1;
1241int test_rewrite_arg = -1;
1242BOOL arg_queue_only = FALSE;
1243BOOL bi_option = FALSE;
1244BOOL checking = FALSE;
1245BOOL count_queue = FALSE;
1246BOOL expansion_test = FALSE;
1247BOOL extract_recipients = FALSE;
1248BOOL forced_delivery = FALSE;
1249BOOL f_end_dot = FALSE;
1250BOOL deliver_give_up = FALSE;
1251BOOL list_queue = FALSE;
1252BOOL list_options = FALSE;
1253BOOL local_queue_only;
1254BOOL more = TRUE;
1255BOOL one_msg_action = FALSE;
1256BOOL queue_only_set = FALSE;
1257BOOL receiving_message = TRUE;
1258BOOL unprivileged;
1259BOOL removed_privilege = FALSE;
1260BOOL verify_address_mode = FALSE;
1261BOOL verify_as_sender = FALSE;
1262BOOL version_printed = FALSE;
1263uschar *alias_arg = NULL;
1264uschar *called_as = US"";
1265uschar *start_queue_run_id = NULL;
1266uschar *stop_queue_run_id = NULL;
1267uschar *ftest_domain = NULL;
1268uschar *ftest_localpart = NULL;
1269uschar *ftest_prefix = NULL;
1270uschar *ftest_suffix = NULL;
1271uschar *real_sender_address;
1272uschar *originator_home = US"/";
059ec3d9
PH
1273void *reset_point;
1274
1275struct passwd *pw;
1276struct stat statbuf;
1277pid_t passed_qr_pid = (pid_t)0;
1278int passed_qr_pipe = -1;
1279gid_t group_list[NGROUPS_MAX];
1280
1281/* Possible options for -R and -S */
1282
1283static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1284
1285/* Need to define this in case we need to change the environment in order
1286to get rid of a bogus time zone. We have to make it char rather than uschar
1287because some OS define it in /usr/include/unistd.h. */
1288
1289extern char **environ;
1290
35edf2ff 1291/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1292defined by ref:name at build time, we must now find the actual uid/gid values.
1293This is a feature to make the lives of binary distributors easier. */
1294
1295#ifdef EXIM_USERNAME
1296if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1297 {
1298 exim_gid = pw->pw_gid;
1299 }
1300else
1301 {
1302 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1303 EXIM_USERNAME);
1304 exit(EXIT_FAILURE);
1305 }
1306#endif
1307
1308#ifdef EXIM_GROUPNAME
1309if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1310 {
1311 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1312 EXIM_GROUPNAME);
1313 exit(EXIT_FAILURE);
1314 }
1315#endif
1316
1317#ifdef CONFIGURE_OWNERNAME
1318if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1319 {
1320 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1321 CONFIGURE_OWNERNAME);
1322 exit(EXIT_FAILURE);
1323 }
1324#endif
1325
35edf2ff
PH
1326#ifdef CONFIGURE_GROUPNAME
1327if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1328 {
1329 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1330 CONFIGURE_GROUPNAME);
1331 exit(EXIT_FAILURE);
1332 }
1333#endif
1334
059ec3d9
PH
1335/* In the Cygwin environment, some initialization needs doing. It is fudged
1336in by means of this macro. */
1337
1338#ifdef OS_INIT
1339OS_INIT
1340#endif
1341
1342/* Check a field which is patched when we are running Exim within its
1343testing harness; do a fast initial check, and then the whole thing. */
1344
1345running_in_test_harness =
1346 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1347
1348/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1349at the start of a program; however, it seems that some environments do not
1350follow this. A "strange" locale can affect the formatting of timestamps, so we
1351make quite sure. */
1352
1353setlocale(LC_ALL, "C");
1354
1355/* Set up the default handler for timing using alarm(). */
1356
1357os_non_restarting_signal(SIGALRM, sigalrm_handler);
1358
1359/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1360because store_malloc writes a log entry on failure. */
1361
1362log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1363if (log_buffer == NULL)
1364 {
1365 fprintf(stderr, "exim: failed to get store for log buffer\n");
1366 exit(EXIT_FAILURE);
1367 }
1368
1369/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1370NULL when the daemon is run and the file is closed. We have to use this
1371indirection, because some systems don't allow writing to the variable "stderr".
1372*/
1373
1374if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1375
1376/* Arrange for the PCRE regex library to use our store functions. Note that
1377the normal calls are actually macros that add additional arguments for
1378debugging purposes so we have to assign specially constructed functions here.
1379The default is to use store in the stacking pool, but this is overridden in the
1380regex_must_compile() function. */
1381
1382pcre_malloc = function_store_get;
1383pcre_free = function_dummy_free;
1384
1385/* Ensure there is a big buffer for temporary use in several places. It is put
1386in malloc store so that it can be freed for enlargement if necessary. */
1387
1388big_buffer = store_malloc(big_buffer_size);
1389
1390/* Set up the handler for the data request signal, and set the initial
1391descriptive text. */
1392
1393set_process_info("initializing");
1394os_restarting_signal(SIGUSR1, usr1_handler);
1395
1396/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1397in the daemon code. For the rest of Exim's uses, we ignore it. */
1398
1399signal(SIGHUP, SIG_IGN);
1400
1401/* We don't want to die on pipe errors as the code is written to handle
1402the write error instead. */
1403
1404signal(SIGPIPE, SIG_IGN);
1405
1406/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1407set to SIG_IGN. This causes subprocesses that complete before the parent
1408process waits for them not to hang around, so when Exim calls wait(), nothing
1409is there. The wait() code has been made robust against this, but let's ensure
1410that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1411ending status. We use sigaction rather than plain signal() on those OS where
1412SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1413problem on AIX with this.) */
1414
1415#ifdef SA_NOCLDWAIT
1416 {
1417 struct sigaction act;
1418 act.sa_handler = SIG_DFL;
1419 sigemptyset(&(act.sa_mask));
1420 act.sa_flags = 0;
1421 sigaction(SIGCHLD, &act, NULL);
1422 }
1423#else
1424signal(SIGCHLD, SIG_DFL);
1425#endif
1426
1427/* Save the arguments for use if we re-exec exim as a daemon after receiving
1428SIGHUP. */
1429
1430sighup_argv = argv;
1431
1432/* Set up the version number. Set up the leading 'E' for the external form of
1433message ids, set the pointer to the internal form, and initialize it to
1434indicate no message being processed. */
1435
1436version_init();
1437message_id_option[0] = '-';
1438message_id_external = message_id_option + 1;
1439message_id_external[0] = 'E';
1440message_id = message_id_external + 1;
1441message_id[0] = 0;
1442
1443/* Set the umask to zero so that any files that Exim creates are created
1444with the modes that it specifies. */
1445
1446umask(0);
1447
1448/* Precompile the regular expression for matching a message id. Keep this in
1449step with the code that generates ids in the accept.c module. We need to do
1450this here, because the -M options check their arguments for syntactic validity
1451using mac_ismsgid, which uses this. */
1452
1453regex_ismsgid =
1454 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1455
1456/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1457this seems to be a generally accepted convention, since one finds symbolic
1458links called "mailq" in standard OS configurations. */
1459
1460if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1461 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1462 {
1463 list_queue = TRUE;
1464 receiving_message = FALSE;
1465 called_as = US"-mailq";
1466 }
1467
1468/* If the program is called as "rmail" treat it as equivalent to
1469"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1470i.e. preventing a single dot on a line from terminating the message, and
1471returning with zero return code, even in cases of error (provided an error
1472message has been sent). */
1473
1474if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1475 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1476 {
1477 dot_ends = FALSE;
1478 called_as = US"-rmail";
1479 errors_sender_rc = EXIT_SUCCESS;
1480 }
1481
1482/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1483this is a smail convention. */
1484
1485if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1486 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1487 {
1488 smtp_input = smtp_batched_input = TRUE;
1489 called_as = US"-rsmtp";
1490 }
1491
1492/* If the program is called as "runq" treat it as equivalent to "exim -q";
1493this is a smail convention. */
1494
1495if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1496 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1497 {
1498 queue_interval = 0;
1499 receiving_message = FALSE;
1500 called_as = US"-runq";
1501 }
1502
1503/* If the program is called as "newaliases" treat it as equivalent to
1504"exim -bi"; this is a sendmail convention. */
1505
1506if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1507 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1508 {
1509 bi_option = TRUE;
1510 receiving_message = FALSE;
1511 called_as = US"-newaliases";
1512 }
1513
1514/* Save the original effective uid for a couple of uses later. It should
1515normally be root, but in some esoteric environments it may not be. */
1516
1517original_euid = geteuid();
1518
1519/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1520to be the same as the real ones. This makes a difference only if Exim is setuid
1521(or setgid) to something other than root, which could be the case in some
1522special configurations. */
1523
1524real_uid = getuid();
1525real_gid = getgid();
1526
1527if (real_uid == root_uid)
1528 {
1529 setgid(real_gid);
1530 setuid(real_uid);
1531 }
1532
1533/* If neither the original real uid nor the original euid was root, Exim is
1534running in an unprivileged state. */
1535
1536unprivileged = (real_uid != root_uid && original_euid != root_uid);
1537
1538/* If the first argument is --help, pretend there are no arguments. This will
1539cause a brief message to be given. */
1540
1541if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1542
1543/* Scan the program's arguments. Some can be dealt with right away; others are
1544simply recorded for checking and handling afterwards. Do a high-level switch
1545on the second character (the one after '-'), to save some effort. */
1546
1547for (i = 1; i < argc; i++)
1548 {
1549 BOOL badarg = FALSE;
1550 uschar *arg = argv[i];
1551 uschar *argrest;
1552 int switchchar;
1553
1554 /* An argument not starting with '-' is the start of a recipients list;
1555 break out of the options-scanning loop. */
1556
1557 if (arg[0] != '-')
1558 {
1559 recipients_arg = i;
1560 break;
1561 }
1562
1563 /* An option consistion of -- terminates the options */
1564
1565 if (Ustrcmp(arg, "--") == 0)
1566 {
1567 recipients_arg = i + 1;
1568 break;
1569 }
1570
1571 /* Handle flagged options */
1572
1573 switchchar = arg[1];
1574 argrest = arg+2;
1575
1576 /* Make all -ex options synonymous with -oex arguments, since that
1577 is assumed by various callers. Also make -qR options synonymous with -R
1578 options, as that seems to be required as well. Allow for -qqR too, and
1579 the same for -S options. */
1580
1581 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1582 Ustrncmp(arg+1, "qR", 2) == 0 ||
1583 Ustrncmp(arg+1, "qS", 2) == 0)
1584 {
1585 switchchar = arg[2];
1586 argrest++;
1587 }
1588 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1589 {
1590 switchchar = arg[3];
1591 argrest += 2;
1592 queue_2stage = TRUE;
1593 }
1594
1595 /* Make -r synonymous with -f, since it is a documented alias */
1596
1597 else if (arg[1] == 'r') switchchar = 'f';
1598
1599 /* Make -ov synonymous with -v */
1600
1601 else if (Ustrcmp(arg, "-ov") == 0)
1602 {
1603 switchchar = 'v';
1604 argrest++;
1605 }
1606
1607 /* High-level switch on active initial letter */
1608
1609 switch(switchchar)
1610 {
1611 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1612 so has no need of it. */
1613
1614 case 'B':
1615 if (*argrest == 0) i++; /* Skip over the type */
1616 break;
1617
1618
1619 case 'b':
1620 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1621
1622 /* -bd: Run in daemon mode, awaiting SMTP connections.
1623 -bdf: Ditto, but in the foreground.
1624 */
1625
1626 if (*argrest == 'd')
1627 {
1628 daemon_listen = TRUE;
1629 if (*(++argrest) == 'f') background_daemon = FALSE;
1630 else if (*argrest != 0) { badarg = TRUE; break; }
1631 }
1632
1633 /* -be: Run in expansion test mode */
1634
1635 else if (*argrest == 'e')
1636 expansion_test = checking = TRUE;
1637
f05da2e8
PH
1638 /* -bF: Run system filter test */
1639
1640 else if (*argrest == 'F')
1641 {
1642 filter_test |= FTEST_SYSTEM;
1643 if (*(++argrest) != 0) { badarg = TRUE; break; }
1644 if (++i < argc) filter_test_sfile = argv[i]; else
1645 {
1646 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1647 exit(EXIT_FAILURE);
1648 }
1649 }
1650
1651 /* -bf: Run user filter test
059ec3d9
PH
1652 -bfd: Set domain for filter testing
1653 -bfl: Set local part for filter testing
1654 -bfp: Set prefix for filter testing
1655 -bfs: Set suffix for filter testing
1656 */
1657
f05da2e8 1658 else if (*argrest == 'f')
059ec3d9 1659 {
f05da2e8 1660 if (*(++argrest) == 0)
059ec3d9 1661 {
f05da2e8
PH
1662 filter_test |= FTEST_USER;
1663 if (++i < argc) filter_test_ufile = argv[i]; else
059ec3d9
PH
1664 {
1665 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1666 exit(EXIT_FAILURE);
1667 }
1668 }
1669 else
1670 {
1671 if (++i >= argc)
1672 {
1673 fprintf(stderr, "exim: string expected after %s\n", arg);
1674 exit(EXIT_FAILURE);
1675 }
1676 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1677 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1678 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1679 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1680 else { badarg = TRUE; break; }
1681 }
1682 }
1683
1684 /* -bh: Host checking - an IP address must follow. */
1685
1686 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1687 {
1688 if (++i >= argc) { badarg = TRUE; break; }
1689 sender_host_address = argv[i];
1690 host_checking = checking = log_testing_mode = TRUE;
1691 host_checking_callout = argrest[1] == 'c';
1692 }
1693
1694 /* -bi: This option is used by sendmail to initialize *the* alias file,
1695 though it has the -oA option to specify a different file. Exim has no
1696 concept of *the* alias file, but since Sun's YP make script calls
1697 sendmail this way, some support must be provided. */
1698
1699 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1700
1701 /* -bm: Accept and deliver message - the default option. Reinstate
1702 receiving_message, which got turned off for all -b options. */
1703
1704 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1705
1706 /* -bnq: For locally originating messages, do not qualify unqualified
1707 addresses. In the envelope, this causes errors; in header lines they
1708 just get left. */
1709
1710 else if (Ustrcmp(argrest, "nq") == 0)
1711 {
1712 allow_unqualified_sender = FALSE;
1713 allow_unqualified_recipient = FALSE;
1714 }
1715
1716 /* -bpxx: List the contents of the mail queue, in various forms. If
1717 the option is -bpc, just a queue count is needed. Otherwise, if the
1718 first letter after p is r, then order is random. */
1719
1720 else if (*argrest == 'p')
1721 {
1722 if (*(++argrest) == 'c')
1723 {
1724 count_queue = TRUE;
1725 if (*(++argrest) != 0) badarg = TRUE;
1726 break;
1727 }
1728
1729 if (*argrest == 'r')
1730 {
1731 list_queue_option = 8;
1732 argrest++;
1733 }
1734 else list_queue_option = 0;
1735
1736 list_queue = TRUE;
1737
1738 /* -bp: List the contents of the mail queue, top-level only */
1739
1740 if (*argrest == 0) {}
1741
1742 /* -bpu: List the contents of the mail queue, top-level undelivered */
1743
1744 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1745
1746 /* -bpa: List the contents of the mail queue, including all delivered */
1747
1748 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1749
1750 /* Unknown after -bp[r] */
1751
1752 else
1753 {
1754 badarg = TRUE;
1755 break;
1756 }
1757 }
1758
1759
1760 /* -bP: List the configuration variables given as the address list.
1761 Force -v, so configuration errors get displayed. */
1762
1763 else if (Ustrcmp(argrest, "P") == 0)
1764 {
1765 list_options = TRUE;
1766 debug_selector |= D_v;
1767 debug_file = stderr;
1768 }
1769
1770 /* -brt: Test retry configuration lookup */
1771
1772 else if (Ustrcmp(argrest, "rt") == 0)
1773 {
1774 test_retry_arg = i + 1;
1775 goto END_ARG;
1776 }
1777
1778 /* -brw: Test rewrite configuration */
1779
1780 else if (Ustrcmp(argrest, "rw") == 0)
1781 {
1782 test_rewrite_arg = i + 1;
1783 goto END_ARG;
1784 }
1785
1786 /* -bS: Read SMTP commands on standard input, but produce no replies -
1787 all errors are reported by sending messages. */
1788
1789 else if (Ustrcmp(argrest, "S") == 0)
1790 smtp_input = smtp_batched_input = receiving_message = TRUE;
1791
1792 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1793 on standard output. */
1794
1795 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1796
1797 /* -bt: address testing mode */
1798
1799 else if (Ustrcmp(argrest, "t") == 0)
1800 address_test_mode = checking = log_testing_mode = TRUE;
1801
1802 /* -bv: verify addresses */
1803
1804 else if (Ustrcmp(argrest, "v") == 0)
1805 verify_address_mode = checking = log_testing_mode = TRUE;
1806
1807 /* -bvs: verify sender addresses */
1808
1809 else if (Ustrcmp(argrest, "vs") == 0)
1810 {
1811 verify_address_mode = checking = log_testing_mode = TRUE;
1812 verify_as_sender = TRUE;
1813 }
1814
1815 /* -bV: Print version string and support details */
1816
1817 else if (Ustrcmp(argrest, "V") == 0)
1818 {
1819 printf("Exim version %s #%s built %s\n", version_string,
1820 version_cnumber, version_date);
1821 printf("%s\n", CS version_copyright);
1822 version_printed = TRUE;
1823 show_whats_supported(stdout);
1824 }
1825
1826 else badarg = TRUE;
1827 break;
1828
1829
1830 /* -C: change configuration file list; ignore if it isn't really
1831 a change! Enforce a prefix check if required. */
1832
1833 case 'C':
1834 if (*argrest == 0)
1835 {
1836 if(++i < argc) argrest = argv[i]; else
1837 { badarg = TRUE; break; }
1838 }
1839 if (Ustrcmp(config_main_filelist, argrest) != 0)
1840 {
1841 #ifdef ALT_CONFIG_PREFIX
1842 int sep = 0;
1843 int len = Ustrlen(ALT_CONFIG_PREFIX);
1844 uschar *list = argrest;
1845 uschar *filename;
1846 while((filename = string_nextinlist(&list, &sep, big_buffer,
1847 big_buffer_size)) != NULL)
1848 {
1849 if ((Ustrlen(filename) < len ||
1850 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1851 Ustrstr(filename, "/../") != NULL) &&
1852 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1853 {
1854 fprintf(stderr, "-C Permission denied\n");
1855 exit(EXIT_FAILURE);
1856 }
1857 }
1858 #endif
1859
1860 config_main_filelist = argrest;
1861 config_changed = TRUE;
1862 }
1863 break;
1864
1865
1866 /* -D: set up a macro definition */
1867
1868 case 'D':
1869 #ifdef DISABLE_D_OPTION
1870 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1871 exit(EXIT_FAILURE);
1872 #else
1873 {
1874 int ptr = 0;
1875 macro_item *mlast = NULL;
1876 macro_item *m;
1877 uschar name[24];
1878 uschar *s = argrest;
1879
1880 while (isspace(*s)) s++;
1881
1882 if (*s < 'A' || *s > 'Z')
1883 {
1884 fprintf(stderr, "exim: macro name set by -D must start with "
1885 "an upper case letter\n");
1886 exit(EXIT_FAILURE);
1887 }
1888
1889 while (isalnum(*s) || *s == '_')
1890 {
1891 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1892 s++;
1893 }
1894 name[ptr] = 0;
1895 if (ptr == 0) { badarg = TRUE; break; }
1896 while (isspace(*s)) s++;
1897 if (*s != 0)
1898 {
1899 if (*s++ != '=') { badarg = TRUE; break; }
1900 while (isspace(*s)) s++;
1901 }
1902
1903 for (m = macros; m != NULL; m = m->next)
1904 {
1905 if (Ustrcmp(m->name, name) == 0)
1906 {
1907 fprintf(stderr, "exim: duplicated -D in command line\n");
1908 exit(EXIT_FAILURE);
1909 }
1910 mlast = m;
1911 }
1912
1913 m = store_get(sizeof(macro_item) + Ustrlen(name));
1914 m->next = NULL;
1915 m->command_line = TRUE;
1916 if (mlast == NULL) macros = m; else mlast->next = m;
1917 Ustrcpy(m->name, name);
1918 m->replacement = string_copy(s);
1919
1920 if (clmacro_count >= MAX_CLMACROS)
1921 {
1922 fprintf(stderr, "exim: too many -D options on command line\n");
1923 exit(EXIT_FAILURE);
1924 }
1925 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1926 m->replacement);
1927 }
1928 #endif
1929 break;
1930
1931 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 1932 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 1933 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
1934
1935 case 'd':
1936 if (Ustrcmp(argrest, "ropcr") == 0)
1937 {
1938 /* drop_cr = TRUE; */
1939 }
1940
1941 /* Use an intermediate variable so that we don't set debugging while
1942 decoding the debugging bits. */
1943
1944 else
1945 {
1946 unsigned int selector = D_default;
1947 debug_selector = 0;
1948 debug_file = NULL;
3d235903
PH
1949 if (*argrest == 'd')
1950 {
1951 debug_daemon = TRUE;
1952 argrest++;
1953 }
059ec3d9 1954 if (*argrest != 0)
1fe64dcc 1955 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
059ec3d9
PH
1956 debug_options_count, US"debug");
1957 debug_selector = selector;
1958 }
1959 break;
1960
1961
1962 /* -E: This is a local error message. This option is not intended for
1963 external use at all, but is not restricted to trusted callers because it
1964 does no harm (just suppresses certain error messages) and if Exim is run
1965 not setuid root it won't always be trusted when it generates error
1966 messages using this option. If there is a message id following -E, point
1967 message_reference at it, for logging. */
1968
1969 case 'E':
1970 local_error_message = TRUE;
1971 if (mac_ismsgid(argrest)) message_reference = argrest;
1972 break;
1973
1974
1975 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1976 option, so it looks as if historically the -oex options are also callable
1977 without the leading -o. So we have to accept them. Before the switch,
1978 anything starting -oe has been converted to -e. Exim does not support all
1979 of the sendmail error options. */
1980
1981 case 'e':
1982 if (Ustrcmp(argrest, "e") == 0)
1983 {
1984 arg_error_handling = ERRORS_SENDER;
1985 errors_sender_rc = EXIT_SUCCESS;
1986 }
1987 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1988 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1989 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1990 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1991 else badarg = TRUE;
1992 break;
1993
1994
1995 /* -F: Set sender's full name, used instead of the gecos entry from
1996 the password file. Since users can usually alter their gecos entries,
1997 there's no security involved in using this instead. The data can follow
1998 the -F or be in the next argument. */
1999
2000 case 'F':
2001 if (*argrest == 0)
2002 {
2003 if(++i < argc) argrest = argv[i]; else
2004 { badarg = TRUE; break; }
2005 }
2006 originator_name = argrest;
2fe1a124 2007 sender_name_forced = TRUE;
059ec3d9
PH
2008 break;
2009
2010
2011 /* -f: Set sender's address - this value is only actually used if Exim is
2012 run by a trusted user, or if untrusted_set_sender is set and matches the
2013 address, except that the null address can always be set by any user. The
2014 test for this happens later, when the value given here is ignored when not
2015 permitted. For an untrusted user, the actual sender is still put in Sender:
2016 if it doesn't match the From: header (unless no_local_from_check is set).
2017 The data can follow the -f or be in the next argument. The -r switch is an
2018 obsolete form of -f but since there appear to be programs out there that
2019 use anything that sendmail has ever supported, better accept it - the
2020 synonymizing is done before the switch above.
2021
2022 At this stage, we must allow domain literal addresses, because we don't
2023 know what the setting of allow_domain_literals is yet. Ditto for trailing
2024 dots and strip_trailing_dot. */
2025
2026 case 'f':
2027 {
2028 int start, end;
2029 uschar *errmess;
2030 if (*argrest == 0)
2031 {
2032 if (i+1 < argc) argrest = argv[++i]; else
2033 { badarg = TRUE; break; }
2034 }
2035 if (*argrest == 0)
2036 {
2037 sender_address = string_sprintf(""); /* Ensure writeable memory */
2038 }
2039 else
2040 {
2041 uschar *temp = argrest + Ustrlen(argrest) - 1;
2042 while (temp >= argrest && isspace(*temp)) temp--;
2043 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2044 allow_domain_literals = TRUE;
2045 strip_trailing_dot = TRUE;
2046 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2047 &sender_address_domain, TRUE);
2048 allow_domain_literals = FALSE;
2049 strip_trailing_dot = FALSE;
2050 if (sender_address == NULL)
2051 {
2052 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2053 return EXIT_FAILURE;
2054 }
2055 }
2056 sender_address_forced = TRUE;
2057 }
2058 break;
2059
2060 /* This is some Sendmail thing which can be ignored */
2061
2062 case 'G':
2063 break;
2064
2065 /* -h: Set the hop count for an incoming message. Exim does not currently
2066 support this; it always computes it by counting the Received: headers.
2067 To put it in will require a change to the spool header file format. */
2068
2069 case 'h':
2070 if (*argrest == 0)
2071 {
2072 if(++i < argc) argrest = argv[i]; else
2073 { badarg = TRUE; break; }
2074 }
2075 if (!isdigit(*argrest)) badarg = TRUE;
2076 break;
2077
2078
2079 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2080 not to be documented for sendmail but mailx (at least) uses it) */
2081
2082 case 'i':
2083 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2084 break;
2085
2086
2087 case 'M':
2088 receiving_message = FALSE;
2089
2090 /* -MC: continue delivery of another message via an existing open
2091 file descriptor. This option is used for an internal call by the
2092 smtp transport when there is a pending message waiting to go to an
2093 address to which it has got a connection. Five subsequent arguments are
2094 required: transport name, host name, IP address, sequence number, and
2095 message_id. Transports may decline to create new processes if the sequence
2096 number gets too big. The channel is stdin. This (-MC) must be the last
2097 argument. There's a subsequent check that the real-uid is privileged.
2098
2099 If we are running in the test harness. delay for a bit, to let the process
2100 that set this one up complete. This makes for repeatability of the logging,
2101 etc. output. */
2102
2103 if (Ustrcmp(argrest, "C") == 0)
2104 {
2105 if (argc != i + 6)
2106 {
2107 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2108 return EXIT_FAILURE;
2109 }
2110
2111 if (msg_action_arg >= 0)
2112 {
2113 fprintf(stderr, "exim: incompatible arguments\n");
2114 return EXIT_FAILURE;
2115 }
2116
2117 continue_transport = argv[++i];
2118 continue_hostname = argv[++i];
2119 continue_host_address = argv[++i];
2120 continue_sequence = Uatoi(argv[++i]);
2121 msg_action = MSG_DELIVER;
2122 msg_action_arg = ++i;
2123 forced_delivery = TRUE;
2124 queue_run_pid = passed_qr_pid;
2125 queue_run_pipe = passed_qr_pipe;
2126
2127 if (!mac_ismsgid(argv[i]))
2128 {
2129 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2130 argv[i]);
2131 return EXIT_FAILURE;
2132 }
2133
2134 if (running_in_test_harness) millisleep(500);
2135 break;
2136 }
2137
2138 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2139 precedes -MC (see above). The flag indicates that the host to which
2140 Exim is connected has accepted an AUTH sequence. */
2141
2142 else if (Ustrcmp(argrest, "CA") == 0)
2143 {
2144 smtp_authenticated = TRUE;
2145 break;
2146 }
2147
2148 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2149 it preceded -MC (see above) */
2150
2151 else if (Ustrcmp(argrest, "CP") == 0)
2152 {
2153 smtp_use_pipelining = TRUE;
2154 break;
2155 }
2156
2157 /* -MCQ: pass on the pid of the queue-running process that started
2158 this chain of deliveries and the fd of its synchronizing pipe; this
2159 is useful only when it precedes -MC (see above) */
2160
2161 else if (Ustrcmp(argrest, "CQ") == 0)
2162 {
2163 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2164 else badarg = TRUE;
2165 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2166 else badarg = TRUE;
2167 break;
2168 }
2169
2170 /* -MCS: set the smtp_use_size flag; this is useful only when it
2171 precedes -MC (see above) */
2172
2173 else if (Ustrcmp(argrest, "CS") == 0)
2174 {
2175 smtp_use_size = TRUE;
2176 break;
2177 }
2178
2179 /* -MCT: set the tls_offered flag; this is useful only when it
2180 precedes -MC (see above). The flag indicates that the host to which
2181 Exim is connected has offered TLS support. */
2182
2183 #ifdef SUPPORT_TLS
2184 else if (Ustrcmp(argrest, "CT") == 0)
2185 {
2186 tls_offered = TRUE;
2187 break;
2188 }
2189 #endif
2190
2191 /* -M[x]: various operations on the following list of message ids:
2192 -M deliver the messages, ignoring next retry times and thawing
2193 -Mc deliver the messages, checking next retry times, no thawing
2194 -Mf freeze the messages
2195 -Mg give up on the messages
2196 -Mt thaw the messages
2197 -Mrm remove the messages
2198 In the above cases, this must be the last option. There are also the
2199 following options which are followed by a single message id, and which
2200 act on that message. Some of them use the "recipient" addresses as well.
2201 -Mar add recipient(s)
2202 -Mmad mark all recipients delivered
2203 -Mmd mark recipients(s) delivered
2204 -Mes edit sender
2205 -Mvb show body
2206 -Mvh show header
2207 -Mvl show log
2208 */
2209
2210 else if (*argrest == 0)
2211 {
2212 msg_action = MSG_DELIVER;
2213 forced_delivery = deliver_force_thaw = TRUE;
2214 }
2215 else if (Ustrcmp(argrest, "ar") == 0)
2216 {
2217 msg_action = MSG_ADD_RECIPIENT;
2218 one_msg_action = TRUE;
2219 }
2220 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2221 else if (Ustrcmp(argrest, "es") == 0)
2222 {
2223 msg_action = MSG_EDIT_SENDER;
2224 one_msg_action = TRUE;
2225 }
2226 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2227 else if (Ustrcmp(argrest, "g") == 0)
2228 {
2229 msg_action = MSG_DELIVER;
2230 deliver_give_up = TRUE;
2231 }
2232 else if (Ustrcmp(argrest, "mad") == 0)
2233 {
2234 msg_action = MSG_MARK_ALL_DELIVERED;
2235 }
2236 else if (Ustrcmp(argrest, "md") == 0)
2237 {
2238 msg_action = MSG_MARK_DELIVERED;
2239 one_msg_action = TRUE;
2240 }
2241 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2242 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2243 else if (Ustrcmp(argrest, "vb") == 0)
2244 {
2245 msg_action = MSG_SHOW_BODY;
2246 one_msg_action = TRUE;
2247 }
2248 else if (Ustrcmp(argrest, "vh") == 0)
2249 {
2250 msg_action = MSG_SHOW_HEADER;
2251 one_msg_action = TRUE;
2252 }
2253 else if (Ustrcmp(argrest, "vl") == 0)
2254 {
2255 msg_action = MSG_SHOW_LOG;
2256 one_msg_action = TRUE;
2257 }
2258 else { badarg = TRUE; break; }
2259
2260 /* All the -Mxx options require at least one message id. */
2261
2262 msg_action_arg = i + 1;
2263 if (msg_action_arg >= argc)
2264 {
2265 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2266 return EXIT_FAILURE;
2267 }
2268
2269 /* Some require only message ids to follow */
2270
2271 if (!one_msg_action)
2272 {
2273 int j;
2274 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2275 {
2276 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2277 argv[j], arg);
2278 return EXIT_FAILURE;
2279 }
2280 goto END_ARG; /* Remaining args are ids */
2281 }
2282
2283 /* Others require only one message id, possibly followed by addresses,
2284 which will be handled as normal arguments. */
2285
2286 else
2287 {
2288 if (!mac_ismsgid(argv[msg_action_arg]))
2289 {
2290 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2291 argv[msg_action_arg], arg);
2292 return EXIT_FAILURE;
2293 }
2294 i++;
2295 }
2296 break;
2297
2298
2299 /* Some programs seem to call the -om option without the leading o;
2300 for sendmail it askes for "me too". Exim always does this. */
2301
2302 case 'm':
2303 if (*argrest != 0) badarg = TRUE;
2304 break;
2305
2306
2307 /* -N: don't do delivery - a debugging option that stops transports doing
2308 their thing. It implies debugging at the D_v level. */
2309
2310 case 'N':
2311 if (*argrest == 0)
2312 {
2313 dont_deliver = TRUE;
2314 debug_selector |= D_v;
2315 debug_file = stderr;
2316 }
2317 else badarg = TRUE;
2318 break;
2319
2320
2321 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2322 it. */
2323
2324 case 'n':
2325 break;
2326
2327 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2328 option to the specified value. This form uses long names. We need to handle
2329 -O option=value and -Ooption=value. */
2330
2331 case 'O':
2332 if (*argrest == 0)
2333 {
2334 if (++i >= argc)
2335 {
2336 fprintf(stderr, "exim: string expected after -O\n");
2337 exit(EXIT_FAILURE);
2338 }
2339 }
2340 break;
2341
2342 case 'o':
2343
2344 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2345 file" option). */
2346
2347 if (*argrest == 'A')
2348 {
2349 alias_arg = argrest + 1;
2350 if (alias_arg[0] == 0)
2351 {
2352 if (i+1 < argc) alias_arg = argv[++i]; else
2353 {
2354 fprintf(stderr, "exim: string expected after -oA\n");
2355 exit(EXIT_FAILURE);
2356 }
2357 }
2358 }
2359
2360 /* -oB: Set a connection message max value for remote deliveries */
2361
2362 else if (*argrest == 'B')
2363 {
2364 uschar *p = argrest + 1;
2365 if (p[0] == 0)
2366 {
2367 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2368 {
2369 connection_max_messages = 1;
2370 p = NULL;
2371 }
2372 }
2373
2374 if (p != NULL)
2375 {
2376 if (!isdigit(*p))
2377 {
2378 fprintf(stderr, "exim: number expected after -oB\n");
2379 exit(EXIT_FAILURE);
2380 }
2381 connection_max_messages = Uatoi(p);
2382 }
2383 }
2384
2385 /* -odb: background delivery */
2386
2387 else if (Ustrcmp(argrest, "db") == 0)
2388 {
2389 synchronous_delivery = FALSE;
2390 arg_queue_only = FALSE;
2391 queue_only_set = TRUE;
2392 }
2393
2394 /* -odf: foreground delivery (smail-compatible option); same effect as
2395 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2396 */
2397
2398 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2399 {
2400 synchronous_delivery = TRUE;
2401 arg_queue_only = FALSE;
2402 queue_only_set = TRUE;
2403 }
2404
2405 /* -odq: queue only */
2406
2407 else if (Ustrcmp(argrest, "dq") == 0)
2408 {
2409 synchronous_delivery = FALSE;
2410 arg_queue_only = TRUE;
2411 queue_only_set = TRUE;
2412 }
2413
2414 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2415 but no remote delivery */
2416
2417 else if (Ustrcmp(argrest, "dqs") == 0)
2418 {
2419 queue_smtp = TRUE;
2420 arg_queue_only = FALSE;
2421 queue_only_set = TRUE;
2422 }
2423
2424 /* -oex: Sendmail error flags. As these are also accepted without the
2425 leading -o prefix, for compatibility with vacation and other callers,
2426 they are handled with -e above. */
2427
2428 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2429 -oitrue: Another sendmail syntax for the same */
2430
2431 else if (Ustrcmp(argrest, "i") == 0 ||
2432 Ustrcmp(argrest, "itrue") == 0)
2433 dot_ends = FALSE;
2434
2435 /* -oM*: Set various characteristics for an incoming message; actually
2436 acted on for trusted callers only. */
2437
2438 else if (*argrest == 'M')
2439 {
2440 if (i+1 >= argc)
2441 {
2442 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2443 exit(EXIT_FAILURE);
2444 }
2445
2446 /* -oMa: Set sender host address */
2447
2448 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2449
2450 /* -oMaa: Set authenticator name */
2451
2452 else if (Ustrcmp(argrest, "Maa") == 0)
2453 sender_host_authenticated = argv[++i];
2454
2455 /* -oMas: setting authenticated sender */
2456
2457 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2458
2459 /* -oMai: setting authenticated id */
2460
2461 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2462
2463 /* -oMi: Set incoming interface address */
2464
2465 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2466
2467 /* -oMr: Received protocol */
2468
2469 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2470
2471 /* -oMs: Set sender host name */
2472
2473 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2474
2475 /* -oMt: Set sender ident */
2476
2477 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2478
2479 /* Else a bad argument */
2480
2481 else
2482 {
2483 badarg = TRUE;
2484 break;
2485 }
2486 }
2487
2488 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2489 seem to call this as -m (undocumented), so that is also accepted (see
2490 above). */
2491
2492 else if (Ustrcmp(argrest, "m") == 0) {}
2493
2494 /* -oo: An ancient flag for old-style addresses which still seems to
2495 crop up in some calls (see in SCO). */
2496
2497 else if (Ustrcmp(argrest, "o") == 0) {}
2498
2499 /* -oP <name>: set pid file path for daemon */
2500
2501 else if (Ustrcmp(argrest, "P") == 0)
2502 override_pid_file_path = argv[++i];
2503
2504 /* -or <n>: set timeout for non-SMTP acceptance
2505 -os <n>: set timeout for SMTP acceptance */
2506
2507 else if (*argrest == 'r' || *argrest == 's')
2508 {
2509 int *tp = (*argrest == 'r')?
2510 &arg_receive_timeout : &arg_smtp_receive_timeout;
2511 if (argrest[1] == 0)
2512 {
2513 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2514 }
2515 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2516 if (*tp < 0)
2517 {
2518 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2519 exit(EXIT_FAILURE);
2520 }
2521 }
2522
2523 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2524
2525 else if (Ustrcmp(argrest, "X") == 0)
2526 override_local_interfaces = argv[++i];
2527
2528 /* Unknown -o argument */
2529
2530 else badarg = TRUE;
2531 break;
2532
2533
2534 /* -ps: force Perl startup; -pd force delayed Perl startup */
2535
2536 case 'p':
2537 #ifdef EXIM_PERL
2538 if (*argrest == 's' && argrest[1] == 0)
2539 {
2540 perl_start_option = 1;
2541 break;
2542 }
2543 if (*argrest == 'd' && argrest[1] == 0)
2544 {
2545 perl_start_option = -1;
2546 break;
2547 }
2548 #endif
2549
2550 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2551 which sets the host protocol and host name */
2552
2553 if (*argrest == 0)
2554 {
2555 if (i+1 < argc) argrest = argv[++i]; else
2556 { badarg = TRUE; break; }
2557 }
2558
2559 if (*argrest != 0)
2560 {
2561 uschar *hn = Ustrchr(argrest, ':');
2562 if (hn == NULL)
2563 {
2564 received_protocol = argrest;
2565 }
2566 else
2567 {
2568 received_protocol = string_copyn(argrest, hn - argrest);
2569 sender_host_name = hn + 1;
2570 }
2571 }
2572 break;
2573
2574
2575 case 'q':
2576 receiving_message = FALSE;
2577
2578 /* -qq...: Do queue runs in a 2-stage manner */
2579
2580 if (*argrest == 'q')
2581 {
2582 queue_2stage = TRUE;
2583 argrest++;
2584 }
2585
2586 /* -qi...: Do only first (initial) deliveries */
2587
2588 if (*argrest == 'i')
2589 {
2590 queue_run_first_delivery = TRUE;
2591 argrest++;
2592 }
2593
2594 /* -qf...: Run the queue, forcing deliveries
2595 -qff..: Ditto, forcing thawing as well */
2596
2597 if (*argrest == 'f')
2598 {
2599 queue_run_force = TRUE;
2600 if (*(++argrest) == 'f')
2601 {
2602 deliver_force_thaw = TRUE;
2603 argrest++;
2604 }
2605 }
2606
2607 /* -q[f][f]l...: Run the queue only on local deliveries */
2608
2609 if (*argrest == 'l')
2610 {
2611 queue_run_local = TRUE;
2612 argrest++;
2613 }
2614
2615 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2616 optionally starting from a given message id. */
2617
2618 if (*argrest == 0 &&
2619 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2620 {
2621 queue_interval = 0;
2622 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2623 start_queue_run_id = argv[++i];
2624 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2625 stop_queue_run_id = argv[++i];
2626 }
2627
2628 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2629 optionally local only. */
2630
2631 else
2632 {
2633 if (*argrest != 0)
2634 queue_interval = readconf_readtime(argrest, 0, FALSE);
2635 else
2636 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2637 if (queue_interval <= 0)
2638 {
2639 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2640 exit(EXIT_FAILURE);
2641 }
2642 }
2643 break;
2644
2645
2646 case 'R': /* Synonymous with -qR... */
2647 receiving_message = FALSE;
2648
2649 /* -Rf: As -R (below) but force all deliveries,
2650 -Rff: Ditto, but also thaw all frozen messages,
2651 -Rr: String is regex
2652 -Rrf: Regex and force
2653 -Rrff: Regex and force and thaw
2654
2655 in all cases provided there are no further characters in this
2656 argument. */
2657
2658 if (*argrest != 0)
2659 {
2660 int i;
2661 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2662 {
2663 if (Ustrcmp(argrest, rsopts[i]) == 0)
2664 {
2665 if (i != 2) queue_run_force = TRUE;
2666 if (i >= 2) deliver_selectstring_regex = TRUE;
2667 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2668 argrest += Ustrlen(rsopts[i]);
2669 }
2670 }
2671 }
2672
2673 /* -R: Set string to match in addresses for forced queue run to
2674 pick out particular messages. */
2675
2676 if (*argrest == 0)
2677 {
2678 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2679 {
2680 fprintf(stderr, "exim: string expected after -R\n");
2681 exit(EXIT_FAILURE);
2682 }
2683 }
2684 else deliver_selectstring = argrest;
2685 if (queue_interval < 0) queue_interval = 0;
2686 break;
2687
2688
2689 /* -r: an obsolete synonym for -f (see above) */
2690
2691
2692 /* -S: Like -R but works on sender. */
2693
2694 case 'S': /* Synonymous with -qS... */
2695 receiving_message = FALSE;
2696
2697 /* -Sf: As -S (below) but force all deliveries,
2698 -Sff: Ditto, but also thaw all frozen messages,
2699 -Sr: String is regex
2700 -Srf: Regex and force
2701 -Srff: Regex and force and thaw
2702
2703 in all cases provided there are no further characters in this
2704 argument. */
2705
2706 if (*argrest != 0)
2707 {
2708 int i;
2709 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2710 {
2711 if (Ustrcmp(argrest, rsopts[i]) == 0)
2712 {
2713 if (i != 2) queue_run_force = TRUE;
2714 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2715 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2716 argrest += Ustrlen(rsopts[i]);
2717 }
2718 }
2719 }
2720
2721 /* -S: Set string to match in addresses for forced queue run to
2722 pick out particular messages. */
2723
2724 if (*argrest == 0)
2725 {
2726 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2727 {
2728 fprintf(stderr, "exim: string expected after -S\n");
2729 exit(EXIT_FAILURE);
2730 }
2731 }
2732 else deliver_selectstring_sender = argrest;
2733 if (queue_interval < 0) queue_interval = 0;
2734 break;
2735
2736 /* -Tqt is an option that is exclusively for use by the testing suite.
2737 It is not recognized in other circumstances. It allows for the setting up
2738 of explicit "queue times" so that various warning/retry things can be
2739 tested. Otherwise variability of clock ticks etc. cause problems. */
2740
2741 case 'T':
2742 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2743 fudged_queue_times = argv[++i];
2744 else badarg = TRUE;
2745 break;
2746
2747
2748 /* -t: Set flag to extract recipients from body of message. */
2749
2750 case 't':
2751 if (*argrest == 0) extract_recipients = TRUE;
2752
2753 /* -ti: Set flag to extract recipients from body of message, and also
2754 specify that dot does not end the message. */
2755
2756 else if (Ustrcmp(argrest, "i") == 0)
2757 {
2758 extract_recipients = TRUE;
2759 dot_ends = FALSE;
2760 }
2761
2762 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2763
2764 #ifdef SUPPORT_TLS
2765 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2766 #endif
2767
2768 else badarg = TRUE;
2769 break;
2770
2771
2772 /* -U: This means "initial user submission" in sendmail, apparently. The
2773 doc claims that in future sendmail may refuse syntactically invalid
2774 messages instead of fixing them. For the moment, we just ignore it. */
2775
2776 case 'U':
2777 break;
2778
2779
2780 /* -v: verify things - this is a very low-level debugging */
2781
2782 case 'v':
2783 if (*argrest == 0)
2784 {
2785 debug_selector |= D_v;
2786 debug_file = stderr;
2787 }
2788 else badarg = TRUE;
2789 break;
2790
2791
2792 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2793
2794 The -x flag tells the sendmail command that mail from a local
2795 mail program has National Language Support (NLS) extended characters
2796 in the body of the mail item. The sendmail command can send mail with
2797 extended NLS characters across networks that normally corrupts these
2798 8-bit characters.
2799
2800 As Exim is 8-bit clean, it just ignores this flag. */
2801
2802 case 'x':
2803 if (*argrest != 0) badarg = TRUE;
2804 break;
2805
2806 /* All other initial characters are errors */
2807
2808 default:
2809 badarg = TRUE;
2810 break;
2811 } /* End of high-level switch statement */
2812
2813 /* Failed to recognize the option, or syntax error */
2814
2815 if (badarg)
2816 {
2817 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2818 "option %s\n", arg);
2819 exit(EXIT_FAILURE);
2820 }
2821 }
2822
2823
2824/* Arguments have been processed. Check for incompatibilities. */
2825
2826END_ARG:
2827if ((
2828 (smtp_input || extract_recipients || recipients_arg < argc) &&
2829 (daemon_listen || queue_interval >= 0 || bi_option ||
2830 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 2831 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
2832 ) ||
2833 (
2834 msg_action_arg > 0 &&
2835 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2836 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2837 ) ||
2838 (
2839 (daemon_listen || queue_interval >= 0) &&
2840 (sender_address != NULL || list_options || list_queue || checking ||
2841 bi_option)
2842 ) ||
2843 (
2844 daemon_listen && queue_interval == 0
2845 ) ||
2846 (
2847 list_options &&
2848 (checking || smtp_input || extract_recipients ||
f05da2e8 2849 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2850 ) ||
2851 (
2852 verify_address_mode &&
2853 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 2854 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2855 ) ||
2856 (
2857 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 2858 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
2859 ) ||
2860 (
f05da2e8 2861 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
2862 extract_recipients)
2863 ) ||
2864 (
2865 deliver_selectstring != NULL && queue_interval < 0
2866 )
2867 )
2868 {
2869 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2870 exit(EXIT_FAILURE);
2871 }
2872
2873/* If debugging is set up, set the file and the file descriptor to pass on to
2874child processes. It should, of course, be 2 for stderr. Also, force the daemon
2875to run in the foreground. */
2876
2877if (debug_selector != 0)
2878 {
2879 debug_file = stderr;
2880 debug_fd = fileno(debug_file);
2881 background_daemon = FALSE;
2882 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2883 if (debug_selector != D_v) /* -v only doesn't show this */
2884 {
2885 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2886 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2887 debug_selector);
2888 show_whats_supported(stderr);
2889 }
2890 }
2891
2892/* When started with root privilege, ensure that the limits on the number of
2893open files and the number of processes (where that is accessible) are
2894sufficiently large, or are unset, in case Exim has been called from an
2895environment where the limits are screwed down. Not all OS have the ability to
2896change some of these limits. */
2897
2898if (unprivileged)
2899 {
2900 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2901 }
2902else
2903 {
2904 struct rlimit rlp;
2905
2906 #ifdef RLIMIT_NOFILE
2907 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2908 {
2909 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2910 strerror(errno));
2911 rlp.rlim_cur = rlp.rlim_max = 0;
2912 }
eb2c0248
PH
2913
2914 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
2915 be exceeded. It turns out that some older OS have a fixed upper limit of
2916 256. */
eb2c0248 2917
059ec3d9
PH
2918 if (rlp.rlim_cur < 1000)
2919 {
2920 rlp.rlim_cur = rlp.rlim_max = 1000;
2921 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 2922 {
a494b1e1
PH
2923 rlp.rlim_cur = rlp.rlim_max = 256;
2924 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2925 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2926 strerror(errno));
eb2c0248 2927 }
059ec3d9
PH
2928 }
2929 #endif
2930
2931 #ifdef RLIMIT_NPROC
2932 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2933 {
2934 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2935 strerror(errno));
2936 rlp.rlim_cur = rlp.rlim_max = 0;
2937 }
2938
2939 #ifdef RLIM_INFINITY
2940 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2941 {
2942 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2943 #else
2944 if (rlp.rlim_cur < 1000)
2945 {
2946 rlp.rlim_cur = rlp.rlim_max = 1000;
2947 #endif
2948 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2949 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2950 strerror(errno));
2951 }
2952 #endif
2953 }
2954
2955/* Exim is normally entered as root (but some special configurations are
2956possible that don't do this). However, it always spins off sub-processes that
2957set their uid and gid as required for local delivery. We don't want to pass on
2958any extra groups that root may belong to, so we want to get rid of them all at
2959this point.
2960
2961We need to obey setgroups() at this stage, before possibly giving up root
2962privilege for a changed configuration file, but later on we might need to
2963check on the additional groups for the admin user privilege - can't do that
2964till after reading the config, which might specify the exim gid. Therefore,
2965save the group list here first. */
2966
2967group_count = getgroups(NGROUPS_MAX, group_list);
2968
2969/* There is a fundamental difference in some BSD systems in the matter of
2970groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2971known not to be different. On the "different" systems there is a single group
2972list, and the first entry in it is the current group. On all other versions of
2973Unix there is a supplementary group list, which is in *addition* to the current
2974group. Consequently, to get rid of all extraneous groups on a "standard" system
2975you pass over 0 groups to setgroups(), while on a "different" system you pass
2976over a single group - the current group, which is always the first group in the
2977list. Calling setgroups() with zero groups on a "different" system results in
2978an error return. The following code should cope with both types of system.
2979
2980However, if this process isn't running as root, setgroups() can't be used
2981since you have to be root to run it, even if throwing away groups. Not being
2982root here happens only in some unusual configurations. We just ignore the
2983error. */
2984
2985if (setgroups(0, NULL) != 0)
2986 {
2987 if (setgroups(1, group_list) != 0 && !unprivileged)
2988 {
2989 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
2990 exit(EXIT_FAILURE);
2991 }
2992 }
2993
2994/* If the configuration file name has been altered by an argument on the
2995command line (either a new file name or a macro definition) and the caller is
2996not root or the exim user, or if this is a filter testing run, remove any
2997setuid privilege the program has, and run as the underlying user.
2998
2999If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3000severely restricts the use of -C for some purposes.
3001
3002Otherwise, set the real ids to the effective values (should be root unless run
3003from inetd, which it can either be root or the exim uid, if one is configured).
3004
3005There is a private mechanism for bypassing some of this, in order to make it
3006possible to test lots of configurations automatically, without having either to
3007recompile each time, or to patch in an actual configuration file name and other
3008values (such as the path name). If running in the test harness, pretend that
3009configuration file changes and macro definitions haven't happened. */
3010
3011if (( /* EITHER */
3012 (config_changed || macros != NULL) && /* Config changed, and */
3013 real_uid != root_uid && /* Not root, and */
3014 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3015 real_uid != exim_uid && /* Not exim, and */
3016 #endif
3017 !running_in_test_harness /* Not fudged */
3018 ) || /* OR */
3019 expansion_test /* expansion testing */
3020 || /* OR */
f05da2e8 3021 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3022 {
3023 setgroups(group_count, group_list);
3024 exim_setugid(real_uid, real_gid, FALSE,
3025 US"-C, -D, -be or -bf forces real uid");
3026 removed_privilege = TRUE;
3027
3028 /* In the normal case when Exim is called like this, stderr is available
3029 and should be used for any logging information because attempts to write
3030 to the log will usually fail. To arrange this, we unset really_exim. However,
3031 if no stderr is available there is no point - we might as well have a go
3032 at the log (if it fails, syslog will be written). */
3033
3034 if (log_stderr != NULL) really_exim = FALSE;
3035 }
3036
3037/* Privilege is to be retained for the moment. It may be dropped later,
3038depending on the job that this Exim process has been asked to do. For now, set
3039the real uid to the effective so that subsequent re-execs of Exim are done by a
3040privileged user. */
3041
3042else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3043
f05da2e8 3044/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3045setups and reading the message. */
3046
f05da2e8
PH
3047if ((filter_test & FTEST_SYSTEM) != 0)
3048 {
3049 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3050 if (filter_sfd < 0)
3051 {
3052 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3053 strerror(errno));
3054 return EXIT_FAILURE;
3055 }
3056 }
3057
3058if ((filter_test & FTEST_USER) != 0)
059ec3d9 3059 {
f05da2e8
PH
3060 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3061 if (filter_ufd < 0)
059ec3d9 3062 {
f05da2e8 3063 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3064 strerror(errno));
3065 return EXIT_FAILURE;
3066 }
3067 }
3068
3069/* Read the main runtime configuration data; this gives up if there
3070is a failure. It leaves the configuration file open so that the subsequent
3071configuration data for delivery can be read if needed. */
3072
3073readconf_main();
3074
3075/* Handle the decoding of logging options. */
3076
1fe64dcc 3077decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
059ec3d9
PH
3078 log_options, log_options_count, US"log");
3079
3080DEBUG(D_any)
3081 {
3082 debug_printf("configuration file is %s\n", config_main_filename);
3083 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3084 log_extra_selector);
3085 }
3086
3087/* If domain literals are not allowed, check the sender address that was
3088supplied with -f. Ditto for a stripped trailing dot. */
3089
3090if (sender_address != NULL)
3091 {
3092 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3093 {
3094 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3095 "allowed\n", sender_address);
3096 return EXIT_FAILURE;
3097 }
3098 if (f_end_dot && !strip_trailing_dot)
3099 {
3100 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3101 "(trailing dot not allowed)\n", sender_address);
3102 return EXIT_FAILURE;
3103 }
3104 }
3105
3106/* Paranoia check of maximum lengths of certain strings. There is a check
3107on the length of the log file path in log.c, which will come into effect
3108if there are any calls to write the log earlier than this. However, if we
3109get this far but the string is very long, it is better to stop now than to
3110carry on and (e.g.) receive a message and then have to collapse. The call to
3111log_write() from here will cause the ultimate panic collapse if the complete
3112file name exceeds the buffer length. */
3113
3114if (Ustrlen(log_file_path) > 200)
3115 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3116 "log_file_path is longer than 200 chars: aborting");
3117
3118if (Ustrlen(pid_file_path) > 200)
3119 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3120 "pid_file_path is longer than 200 chars: aborting");
3121
3122if (Ustrlen(spool_directory) > 200)
3123 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3124 "spool_directory is longer than 200 chars: aborting");
3125
3126/* Length check on the process name given to syslog for its TAG field,
3127which is only permitted to be 32 characters or less. See RFC 3164. */
3128
3129if (Ustrlen(syslog_processname) > 32)
3130 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3131 "syslog_processname is longer than 32 chars: aborting");
3132
3133/* In some operating systems, the environment variable TMPDIR controls where
3134temporary files are created; Exim doesn't use these (apart from when delivering
3135to MBX mailboxes), but called libraries such as DBM libraries may require them.
3136If TMPDIR is found in the environment, reset it to the value defined in the
3137TMPDIR macro, if this macro is defined. */
3138
3139#ifdef TMPDIR
3140 {
3141 uschar **p;
3142 for (p = USS environ; *p != NULL; p++)
3143 {
3144 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3145 Ustrcmp(*p+7, TMPDIR) != 0)
3146 {
3147 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3148 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3149 *p = newp;
3150 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3151 }
3152 }
3153 }
3154#endif
3155
3156/* Timezone handling. If timezone_string is "utc", set a flag to cause all
3157timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3158we may need to get rid of a bogus timezone setting. This can arise when Exim is
3159called by a user who has set the TZ variable. This then affects the timestamps
3160in log files and in Received: headers, and any created Date: header lines. The
3161required timezone is settable in the configuration file, so nothing can be done
3162about this earlier - but hopefully nothing will normally be logged earlier than
3163this. We have to make a new environment if TZ is wrong, but don't bother if
3164timestamps_utc is set, because then all times are in UTC anyway. */
3165
3166if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3167 {
3168 timestamps_utc = TRUE;
3169 }
3170else
3171 {
3172 uschar *envtz = US getenv("TZ");
3173 if ((envtz == NULL && timezone_string != NULL) ||
3174 (envtz != NULL &&
3175 (timezone_string == NULL ||
3176 Ustrcmp(timezone_string, envtz) != 0)))
3177 {
3178 uschar **p = USS environ;
3179 uschar **new;
3180 uschar **newp;
3181 int count = 0;
3182 while (*p++ != NULL) count++;
3183 if (envtz == NULL) count++;
3184 newp = new = malloc(sizeof(uschar *) * (count + 1));
3185 for (p = USS environ; *p != NULL; p++)
3186 {
3187 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3188 *newp++ = *p;
3189 }
3190 if (timezone_string != NULL)
3191 {
3192 *newp = malloc(Ustrlen(timezone_string) + 4);
3193 sprintf(CS *newp++, "TZ=%s", timezone_string);
3194 }
3195 *newp = NULL;
3196 environ = CSS new;
3197 tzset();
3198 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3199 tod_stamp(tod_log));
3200 }
3201 }
3202
3203/* Handle the case when we have removed the setuid privilege because of -C or
3204-D. This means that the caller of Exim was not root, and, provided that
3205ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3206the binary.
3207
3208If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3209were running as the exim user defined in the configuration file (different to
3210the one in the binary). The sysadmin may expect this case to retain privilege
3211because "the binary was called by the Exim user", but it hasn't, because of the
3212order in which it handles this stuff. There are two possibilities:
3213
3214 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3215 to do message deliveries. Thus, the fact that it is running as a
3216 non-privileged user is plausible, and might be wanted in some special
3217 configurations. However, really_exim will have been set false when
3218 privilege was dropped, to stop Exim trying to write to its normal log
3219 files. Therefore, re-enable normal log processing, assuming the sysadmin
3220 has set up the log directory correctly.
3221
3222 (2) If deliver_drop_privilege is not set, the configuration won't work as
3223 apparently intended, and so we log a panic message. In order to retain
3224 root for -C or -D, the caller must either be root or the Exim user
3225 defined in the binary (when deliver_drop_ privilege is false).
3226
3227If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3228built-in exim user or one defined in the configuration. In either event,
3229re-enable log processing, assuming the sysadmin knows what they are doing. */
3230
3231if (removed_privilege && (config_changed || macros != NULL) &&
3232 real_uid == exim_uid)
3233 {
3234 #ifdef ALT_CONFIG_ROOT_ONLY
3235 really_exim = TRUE; /* let logging work normally */
3236 #else
3237
3238 if (deliver_drop_privilege)
3239 really_exim = TRUE; /* let logging work normally */
3240 else
3241 log_write(0, LOG_MAIN|LOG_PANIC,
3242 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3243 (int)exim_uid, config_changed? "-C" : "-D");
3244 #endif
3245 }
3246
3247/* Start up Perl interpreter if Perl support is configured and there is a
3248perl_startup option, and the configuration or the command line specifies
3249initializing starting. Note that the global variables are actually called
3250opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3251
3252#ifdef EXIM_PERL
3253if (perl_start_option != 0)
3254 opt_perl_at_start = (perl_start_option > 0);
3255if (opt_perl_at_start && opt_perl_startup != NULL)
3256 {
3257 uschar *errstr;
3258 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3259 errstr = init_perl(opt_perl_startup);
3260 if (errstr != NULL)
3261 {
3262 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3263 return EXIT_FAILURE;
3264 }
3265 opt_perl_started = TRUE;
3266 }
3267#endif /* EXIM_PERL */
3268
3269/* Log the arguments of the call if the configuration file said so. This is
3270a debugging feature for finding out what arguments certain MUAs actually use.
3271Don't attempt it if logging is disabled, or if listing variables or if
3272verifying/testing addresses or expansions. */
3273
31619da6
PH
3274if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3275 && really_exim && !list_options && !checking)
059ec3d9
PH
3276 {
3277 int i;
3278 uschar *p = big_buffer;
3279 Ustrcpy(p, "cwd=");
3280 (void)getcwd(CS p+4, big_buffer_size - 4);
3281 while (*p) p++;
3282 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3283 while (*p) p++;
3284 for (i = 0; i < argc; i++)
3285 {
3286 int len = Ustrlen(argv[i]);
3287 uschar *printing;
3288 uschar *quote;
3289 if (p + len + 8 >= big_buffer + big_buffer_size)
3290 {
3291 Ustrcpy(p, " ...");
3292 log_write(0, LOG_MAIN, "%s", big_buffer);
3293 Ustrcpy(big_buffer, "...");
3294 p = big_buffer + 3;
3295 }
3296 printing = string_printing(argv[i]);
3297 if (printing[0] == 0) quote = US"\""; else
3298 {
3299 uschar *pp = printing;
3300 quote = US"";
3301 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3302 }
3303 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3304 (p - big_buffer) - 4), printing, quote);
3305 while (*p) p++;
3306 }
31619da6
PH
3307
3308 if ((log_extra_selector & LX_arguments) != 0)
3309 log_write(0, LOG_MAIN, "%s", big_buffer);
3310 else
3311 debug_printf("%s\n", big_buffer);
059ec3d9
PH
3312 }
3313
3314/* Set the working directory to be the top-level spool directory. We don't rely
3315on this in the code, which always uses fully qualified names, but it's useful
3316for core dumps etc. Don't complain if it fails - the spool directory might not
3317be generally accessible and calls with the -C option (and others) have lost
ba18e66a
PH
3318privilege by now. Before the chdir, we try to ensure that the directory exists.
3319*/
059ec3d9
PH
3320
3321if (Uchdir(spool_directory) != 0)
3322 {
ba18e66a 3323 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
059ec3d9
PH
3324 (void)Uchdir(spool_directory);
3325 }
3326
3327/* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3328alias file. Exim doesn't have such a concept, but this call is screwed into
3329Sun's YP makefiles. Handle this by calling a configured script, as the real
3330user who called Exim. The -oA option can be used to pass an argument to the
3331script. */
3332
3333if (bi_option)
3334 {
1fe64dcc 3335 (void)fclose(config_file);
059ec3d9
PH
3336 if (bi_command != NULL)
3337 {
3338 int i = 0;
3339 uschar *argv[3];
3340 argv[i++] = bi_command;
3341 if (alias_arg != NULL) argv[i++] = alias_arg;
3342 argv[i++] = NULL;
3343
3344 setgroups(group_count, group_list);
3345 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3346
3347 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3348 (argv[1] == NULL)? US"" : argv[1]);
3349
3350 execv(CS argv[0], (char *const *)argv);
3351 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3352 exit(EXIT_FAILURE);
3353 }
3354 else
3355 {
3356 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3357 exit(EXIT_SUCCESS);
3358 }
3359 }
3360
3361/* If an action on specific messages is requested, or if a daemon or queue
3362runner is being started, we need to know if Exim was called by an admin user.
3363This is the case if the real user is root or exim, or if the real group is
3364exim, or if one of the supplementary groups is exim or a group listed in
3365admin_groups. We don't fail all message actions immediately if not admin_user,
3366since some actions can be performed by non-admin users. Instead, set admin_user
3367for later interrogation. */
3368
3369if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3370 admin_user = TRUE;
3371else
3372 {
3373 int i, j;
3374
3375 for (i = 0; i < group_count; i++)
3376 {
3377 if (group_list[i] == exim_gid) admin_user = TRUE;
3378 else if (admin_groups != NULL)
3379 {
3380 for (j = 1; j <= (int)(admin_groups[0]); j++)
3381 if (admin_groups[j] == group_list[i])
3382 { admin_user = TRUE; break; }
3383 }
3384 if (admin_user) break;
3385 }
3386 }
3387
3388/* Another group of privileged users are the trusted users. These are root,
3389exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3390are permitted to specify sender_addresses with -f on the command line, and
3391other message parameters as well. */
3392
3393if (real_uid == root_uid || real_uid == exim_uid)
3394 trusted_caller = TRUE;
3395else
3396 {
3397 int i, j;
3398
3399 if (trusted_users != NULL)
3400 {
3401 for (i = 1; i <= (int)(trusted_users[0]); i++)
3402 if (trusted_users[i] == real_uid)
3403 { trusted_caller = TRUE; break; }
3404 }
3405
3406 if (!trusted_caller && trusted_groups != NULL)
3407 {
3408 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3409 {
3410 if (trusted_groups[i] == real_gid)
3411 trusted_caller = TRUE;
3412 else for (j = 0; j < group_count; j++)
3413 {
3414 if (trusted_groups[i] == group_list[j])
3415 { trusted_caller = TRUE; break; }
3416 }
3417 if (trusted_caller) break;
3418 }
3419 }
3420 }
3421
3422if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3423if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3424
3425/* Only an admin user may start the daemon or force a queue run in the default
3426configuration, but the queue run restriction can be relaxed. Only an admin
3427user may request that a message be returned to its sender forthwith. Only an
3428admin user may specify a debug level greater than D_v (because it might show
3429passwords, etc. in lookup queries). Only an admin user may request a queue
3430count. */
3431
3432if (!admin_user)
3433 {
3434 BOOL debugset = (debug_selector & ~D_v) != 0;
3435 if (deliver_give_up || daemon_listen ||
3436 (count_queue && queue_list_requires_admin) ||
3437 (list_queue && queue_list_requires_admin) ||
3438 (queue_interval >= 0 && prod_requires_admin) ||
3439 (debugset && !running_in_test_harness))
3440 {
3441 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3442 exit(EXIT_FAILURE);
3443 }
3444 }
3445
3446/* If the real user is not root or the exim uid, the argument for passing
3447in an open TCP/IP connection for another message is not permitted, nor is
3448running with the -N option for any delivery action, unless this call to exim is
3449one that supplied an input message, or we are using a patched exim for
3450regression testing. */
3451
3452if (real_uid != root_uid && real_uid != exim_uid &&
3453 (continue_hostname != NULL ||
3454 (dont_deliver &&
3455 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3456 )) && !running_in_test_harness)
3457 {
3458 fprintf(stderr, "exim: Permission denied\n");
3459 return EXIT_FAILURE;
3460 }
3461
3462/* If the caller is not trusted, certain arguments are ignored when running for
f05da2e8
PH
3463real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3464Note that authority for performing certain actions on messages is tested in the
059ec3d9
PH
3465queue_action() function. */
3466
f05da2e8 3467if (!trusted_caller && !checking && filter_test == FTEST_NONE)
059ec3d9
PH
3468 {
3469 sender_host_name = sender_host_address = interface_address =
3470 sender_ident = received_protocol = NULL;
3471 sender_host_port = interface_port = 0;
3472 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3473 }
3474
3475/* If a sender host address is set, extract the optional port number off the
3476end of it and check its syntax. Do the same thing for the interface address.
3477Exim exits if the syntax is bad. */
3478
3479else
3480 {
3481 if (sender_host_address != NULL)
3482 sender_host_port = check_port(sender_host_address);
3483 if (interface_address != NULL)
3484 interface_port = check_port(interface_address);
3485 }
3486
3487/* If an SMTP message is being received check to see if the standard input is a
3488TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3489caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3490barf. */
3491
3492if (smtp_input)
3493 {
3494 union sockaddr_46 inetd_sock;
36a3b041 3495 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
059ec3d9
PH
3496 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3497 {
3498 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3499 if (family == AF_INET || family == AF_INET6)
3500 {
3501 union sockaddr_46 interface_sock;
3502 size = sizeof(interface_sock);
3503
3504 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3505 interface_address = host_ntoa(-1, &interface_sock, NULL,
3506 &interface_port);
3507
3508 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3509
3510 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3511 {
3512 is_inetd = TRUE;
3513 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3514 NULL, &sender_host_port);
3515 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3516 "inetd is not supported when mua_wrapper is set");
3517 }
3518 else
3519 {
3520 fprintf(stderr,
3521 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3522 return EXIT_FAILURE;
3523 }
3524 }
3525 }
3526 }
3527
3528/* If the load average is going to be needed while receiving a message, get it
3529now for those OS that require the first call to os_getloadavg() to be done as
3530root. There will be further calls later for each message received. */
3531
3532#ifdef LOAD_AVG_NEEDS_ROOT
3533if (receiving_message &&
3534 (queue_only_load >= 0 ||
3535 (is_inetd && smtp_load_reserve >= 0)
3536 ))
3537 {
3538 load_average = os_getloadavg();
3539 }
3540#endif
3541
3542/* The queue_only configuration option can be overridden by -odx on the command
3543line, except that if queue_only_override is false, queue_only cannot be unset
3544from the command line. */
3545
3546if (queue_only_set && (queue_only_override || arg_queue_only))
3547 queue_only = arg_queue_only;
3548
3549/* The receive_timeout and smtp_receive_timeout options can be overridden by
3550-or and -os. */
3551
3552if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3553if (arg_smtp_receive_timeout >= 0)
3554 smtp_receive_timeout = arg_smtp_receive_timeout;
3555
3556/* If Exim was started with root privilege, unless we have already removed the
3557root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3558except when starting the daemon or doing some kind of delivery or address
3559testing (-bt). These are the only cases when root need to be retained. We run
3560as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3561retained only for starting the daemon. */
3562
3563if (!unprivileged && /* originally had root AND */
3564 !removed_privilege && /* still got root AND */
3565 !daemon_listen && /* not starting the daemon */
3566 queue_interval <= 0 && /* (either kind of daemon) */
3567 ( /* AND EITHER */
3568 deliver_drop_privilege || /* requested unprivileged */
3569 ( /* OR */
3570 queue_interval < 0 && /* not running the queue */
3571 (msg_action_arg < 0 || /* and */
3572 msg_action != MSG_DELIVER) && /* not delivering and */
3573 (!checking || !address_test_mode) /* not address checking */
3574 )
3575 ))
3576 {
3577 exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed");
3578 }
3579
3580/* When we are retaining a privileged uid, we still change to the exim gid. */
3581
3582else setgid(exim_gid);
3583
3584/* Handle a request to list the delivery queue */
3585
3586if (list_queue)
3587 {
3588 set_process_info("listing the queue");
3589 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3590 exit(EXIT_SUCCESS);
3591 }
3592
3593/* Handle a request to count the delivery queue */
3594
3595if (count_queue)
3596 {
3597 set_process_info("counting the queue");
3598 queue_count();
3599 exit(EXIT_SUCCESS);
3600 }
3601
3602/* Handle actions on specific messages, except for the force delivery action,
3603which is done below. Some actions take a whole list of message ids, which
3604are known to continue up to the end of the arguments. Others take a single
3605message id and then operate on the recipients list. */
3606
3607if (msg_action_arg > 0 && msg_action != MSG_DELIVER)
3608 {
3609 int yield = EXIT_SUCCESS;
3610 set_process_info("acting on specified messages");
3611
3612 if (!one_msg_action)
3613 {
3614 for (i = msg_action_arg; i < argc; i++)
3615 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3616 yield = EXIT_FAILURE;
3617 }
3618
3619 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3620 recipients_arg)) yield = EXIT_FAILURE;
3621 exit(yield);
3622 }
3623
3624/* All the modes below here require the remaining configuration sections
3625to be read, except that we can skip over the ACL setting when delivering
3626specific messages, or doing a queue run. (For various testing cases we could
3627skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3628for skipping. */
3629
3630readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3631
3632/* The configuration data will have been read into POOL_PERM because we won't
3633ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3634this is just a bit of pedantic tidiness. It wouldn't really matter if the
3635configuration were read into POOL_MAIN, because we don't do any resets till
3636later on. However, it seems right, and it does ensure that both pools get used.
3637*/
3638
3639store_pool = POOL_MAIN;
3640
3641/* Handle the -brt option. This is for checking out retry configurations.
3642The next three arguments are a domain name or a complete address, and
3643optionally two error numbers. All it does is to call the function that
3644scans the retry configuration data. */
3645
3646if (test_retry_arg >= 0)
3647 {
3648 retry_config *yield;
3649 int basic_errno = 0;
3650 int more_errno = 0;
3651 uschar *s1, *s2;
3652
3653 if (test_retry_arg >= argc)
3654 {
3655 printf("-brt needs a domain or address argument\n");
3656 exim_exit(EXIT_FAILURE);
3657 }
3658 s1 = argv[test_retry_arg++];
3659 s2 = NULL;
3660
3661 /* If the first argument contains no @ and no . it might be a local user
3662 or it might be a single-component name. Treat as a domain. */
3663
3664 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3665 {
3666 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3667 "being \ntreated as a one-component domain, not as a local part.\n\n",
3668 s1);
3669 }
3670
3671 /* There may be an optional second domain arg. */
3672
3673 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3674 s2 = argv[test_retry_arg++];
3675
3676 /* The final arg is an error name */
3677
3678 if (test_retry_arg < argc)
3679 {
3680 uschar *ss = argv[test_retry_arg];
3681 uschar *error =
3682 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3683 if (error != NULL)
3684 {
3685 printf("%s\n", CS error);
3686 return EXIT_FAILURE;
3687 }
3688
3689 /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as
3690 an error is for matching codes to the decade. Turn them into a real error
3691 code, off the decade. */
3692
3693 if (basic_errno == ERRNO_RCPT4XX)
3694 {
3695 int code = (more_errno >> 8) & 255;
3696 if (code == 255)
3697 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3698 else if (code > 100)
3699 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3700 }
3701 }
3702
3703 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3704 if (yield == NULL) printf("No retry information found\n"); else
3705 {
3706 retry_rule *r;
3707 more_errno = yield->more_errno;
3708 printf("Retry rule: %s ", yield->pattern);
3709
3710 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3711 {
3712 printf("quota%s%s ",
3713 (more_errno > 0)? "_" : "",
3714 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3715 }
3716 else if (yield->basic_errno == ECONNREFUSED)
3717 {
3718 printf("refused%s%s ",
3719 (more_errno > 0)? "_" : "",
3720 (more_errno == 'M')? "MX" :
3721 (more_errno == 'A')? "A" : "");
3722 }
3723 else if (yield->basic_errno == ETIMEDOUT)
3724 {
3725 printf("timeout");
3726 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3727 more_errno &= 255;
3728 if (more_errno != 0) printf("_%s",
3729 (more_errno == 'M')? "MX" : "A");
3730 printf(" ");
3731 }
3732 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3733 printf("auth_failed ");
3734 else printf("* ");
3735
3736 for (r = yield->rules; r != NULL; r = r->next)
3737 {
3738 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3739 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3740 if (r->rule == 'G')
3741 {
3742 int x = r->p2;
3743 int f = x % 1000;
3744 int d = 100;
3745 printf(",%d.", x/1000);
3746 do
3747 {
3748 printf("%d", f/d);
3749 f %= d;
3750 d /= 10;
3751 }
3752 while (f != 0);
3753 }
3754 printf("; ");
3755 }
3756
3757 printf("\n");
3758 }
3759 exim_exit(EXIT_SUCCESS);
3760 }
3761
3762/* Handle a request to list one or more configuration options */
3763
3764if (list_options)
3765 {
3766 set_process_info("listing variables");
3767 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3768 else for (i = recipients_arg; i < argc; i++)
3769 {
3770 if (i < argc - 1 &&
3771 (Ustrcmp(argv[i], "router") == 0 ||
3772 Ustrcmp(argv[i], "transport") == 0 ||
3773 Ustrcmp(argv[i], "authenticator") == 0))
3774 {
3775 readconf_print(argv[i+1], argv[i]);
3776 i++;
3777 }
3778 else readconf_print(argv[i], NULL);
3779 }
3780 exim_exit(EXIT_SUCCESS);
3781 }
3782
3783
3784/* Handle a request to deliver one or more messages that are already on the
3785queue. Values of msg_action other than MSG_DELIVER are dealt with above. This
3786is typically used for a small number when prodding by hand (when the option
3787forced_delivery will be set) or when re-execing to regain root privilege.
3788Each message delivery must happen in a separate process, so we fork a process
3789for each one, and run them sequentially so that debugging output doesn't get
3790intertwined, and to avoid spawning too many processes if a long list is given.
3791However, don't fork for the last one; this saves a process in the common case
3792when Exim is called to deliver just one message. */
3793
3794if (msg_action_arg > 0)
3795 {
3796 if (prod_requires_admin && !admin_user)
3797 {
3798 fprintf(stderr, "exim: Permission denied\n");
3799 exim_exit(EXIT_FAILURE);
3800 }
3801 set_process_info("delivering specified messages");
3802 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3803 for (i = msg_action_arg; i < argc; i++)
3804 {
3805 int status;
3806 pid_t pid;
3807 if (i == argc - 1)
3808 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3809 else if ((pid = fork()) == 0)
3810 {
3811 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3812 _exit(EXIT_SUCCESS);
3813 }
3814 else if (pid < 0)
3815 {
3816 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3817 strerror(errno));
3818 exim_exit(EXIT_FAILURE);
3819 }
3820 else wait(&status);
3821 }
3822 exim_exit(EXIT_SUCCESS);
3823 }
3824
3825
3826/* If only a single queue run is requested, without SMTP listening, we can just
3827turn into a queue runner, with an optional starting message id. */
3828
3829if (queue_interval == 0 && !daemon_listen)
3830 {
3831 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3832 (start_queue_run_id == NULL)? US"" : US" starting at ",
3833 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3834 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3835 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3836 set_process_info("running the queue (single queue run)");
3837 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3838 exim_exit(EXIT_SUCCESS);
3839 }
3840
3841
3842/* Find the login name of the real user running this process. This is always
3843needed when receiving a message, because it is written into the spool file. It
3844may also be used to construct a from: or a sender: header, and in this case we
3845need the user's full name as well, so save a copy of it, checked for RFC822
3846syntax and munged if necessary, if it hasn't previously been set by the -F
3847argument. We may try to get the passwd entry more than once, in case NIS or
3848other delays are in evidence. Save the home directory for use in filter testing
3849(only). */
3850
3851for (i = 0;;)
3852 {
3853 if ((pw = getpwuid(real_uid)) != NULL)
3854 {
3855 originator_login = string_copy(US pw->pw_name);
3856 originator_home = string_copy(US pw->pw_dir);
3857
3858 /* If user name has not been set by -F, set it from the passwd entry
3859 unless -f has been used to set the sender address by a trusted user. */
3860
3861 if (originator_name == NULL)
3862 {
3863 if (sender_address == NULL ||
f05da2e8 3864 (!trusted_caller && filter_test == FTEST_NONE))
059ec3d9
PH
3865 {
3866 uschar *name = US pw->pw_gecos;
3867 uschar *amp = Ustrchr(name, '&');
3868 uschar buffer[256];
3869
3870 /* Most Unix specify that a '&' character in the gecos field is
3871 replaced by a copy of the login name, and some even specify that
3872 the first character should be upper cased, so that's what we do. */
3873
3874 if (amp != NULL)
3875 {
3876 int loffset;
3877 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3878 amp - name, name, &loffset, originator_login, amp + 1);
3879 buffer[loffset] = toupper(buffer[loffset]);
3880 name = buffer;
3881 }
3882
3883 /* If a pattern for matching the gecos field was supplied, apply
3884 it and then expand the name string. */
3885
3886 if (gecos_pattern != NULL && gecos_name != NULL)
3887 {
3888 const pcre *re;
3889 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
3890
3891 if (regex_match_and_setup(re, name, 0, -1))
3892 {
3893 uschar *new_name = expand_string(gecos_name);
3894 expand_nmax = -1;
3895 if (new_name != NULL)
3896 {
3897 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
3898 "gecos field \"%s\"\n", new_name, name);
3899 name = new_name;
3900 }
3901 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
3902 "\"%s\": %s\n", gecos_name, expand_string_message);
3903 }
3904 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
3905 "gecos field \"%s\"\n", gecos_pattern, name);
3906 store_free((void *)re);
3907 }
3908 originator_name = string_copy(name);
3909 }
3910
3911 /* A trusted caller has used -f but not -F */
3912
3913 else originator_name = US"";
3914 }
3915
3916 /* Break the retry loop */
3917
3918 break;
3919 }
3920
3921 if (++i > finduser_retries) break;
3922 sleep(1);
3923 }
3924
3925/* If we cannot get a user login, log the incident and give up, unless the
3926configuration specifies something to use. When running in the test harness,
8800895a 3927any setting of unknown_login overrides the actual name. */
059ec3d9
PH
3928
3929if (originator_login == NULL || running_in_test_harness)
3930 {
3931 if (unknown_login != NULL)
3932 {
3933 originator_login = expand_string(unknown_login);
3934 if (originator_name == NULL && unknown_username != NULL)
3935 originator_name = expand_string(unknown_username);
3936 if (originator_name == NULL) originator_name = US"";
3937 }
3938 if (originator_login == NULL)
3939 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
3940 (int)real_uid);
3941 }
3942
3943/* Ensure that the user name is in a suitable form for use as a "phrase" in an
3944RFC822 address.*/
3945
3946originator_name = string_copy(parse_fix_phrase(originator_name,
3947 Ustrlen(originator_name), big_buffer, big_buffer_size));
3948
3949/* If a message is created by this call of Exim, the uid/gid of its originator
3950are those of the caller. These values are overridden if an existing message is
3951read in from the spool. */
3952
3953originator_uid = real_uid;
3954originator_gid = real_gid;
3955
3956DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
3957 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
3958
3959/* Run in daemon and/or queue-running mode. The function daemon_go() never
3960returns. We leave this till here so that the originator_ fields are available
47c7a64a
PH
3961for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
3962mode. */
059ec3d9
PH
3963
3964if (daemon_listen || queue_interval > 0)
3965 {
47c7a64a
PH
3966 if (mua_wrapper)
3967 {
3968 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
3969 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
3970 "mua_wrapper is set");
3971 }
059ec3d9
PH
3972 daemon_go();
3973 }
3974
3975/* If the sender ident has not been set (by a trusted caller) set it to
3976the caller. This will get overwritten below for an inetd call. If a trusted
3977caller has set it empty, unset it. */
3978
3979if (sender_ident == NULL) sender_ident = originator_login;
3980 else if (sender_ident[0] == 0) sender_ident = NULL;
3981
3982/* Handle the -brw option, which is for checking out rewriting rules. Cause log
3983writes (on errors) to go to stderr instead. Can't do this earlier, as want the
3984originator_* variables set. */
3985
3986if (test_rewrite_arg >= 0)
3987 {
3988 really_exim = FALSE;
3989 if (test_rewrite_arg >= argc)
3990 {
3991 printf("-brw needs an address argument\n");
3992 exim_exit(EXIT_FAILURE);
3993 }
3994 rewrite_test(argv[test_rewrite_arg]);
3995 exim_exit(EXIT_SUCCESS);
3996 }
3997
3998/* A locally-supplied message is considered to be coming from a local user
3999unless a trusted caller supplies a sender address with -f, or is passing in the
4000message via SMTP (inetd invocation or otherwise). */
4001
4002if ((sender_address == NULL && !smtp_input) ||
f05da2e8 4003 (!trusted_caller && filter_test == FTEST_NONE))
059ec3d9
PH
4004 {
4005 sender_local = TRUE;
4006
4007 /* A trusted caller can supply authenticated_sender and authenticated_id
4008 via -oMas and -oMai and if so, they will already be set. */
4009
4010 if (authenticated_sender == NULL)
4011 authenticated_sender = string_sprintf("%s@%s", originator_login,
4012 qualify_domain_sender);
4013 if (authenticated_id == NULL) authenticated_id = originator_login;
4014 }
4015
4016/* Trusted callers are always permitted to specify the sender address.
4017Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4018is specified is the empty address. However, if a trusted caller does not
4019specify a sender address for SMTP input, we leave sender_address unset. This
4020causes the MAIL commands to be honoured. */
4021
4022if ((!smtp_input && sender_address == NULL) ||
4023 !receive_check_set_sender(sender_address))
4024 {
4025 /* Either the caller is not permitted to set a general sender, or this is
4026 non-SMTP input and the trusted caller has not set a sender. If there is no
4027 sender, or if a sender other than <> is set, override with the originator's
4028 login (which will get qualified below), except when checking things. */
4029
4030 if (sender_address == NULL /* No sender_address set */
4031 || /* OR */
4032 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4033 !checking && /* Not running tests, AND */
f05da2e8 4034 filter_test == FTEST_NONE)) /* Not testing a filter */
059ec3d9
PH
4035 {
4036 sender_address = originator_login;
4037 sender_address_forced = FALSE;
4038 sender_address_domain = 0;
4039 }
4040 }
4041
4042/* Remember whether an untrusted caller set the sender address */
4043
4044sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4045
4046/* Ensure that the sender address is fully qualified unless it is the empty
4047address, which indicates an error message, or doesn't exist (root caller, smtp
4048interface, no -f argument). */
4049
4050if (sender_address != NULL && sender_address[0] != 0 &&
4051 sender_address_domain == 0)
4052 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4053 qualify_domain_sender);
4054
4055DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4056
4057/* Handle a request to verify a list of addresses, or test them for delivery.
4058This must follow the setting of the sender address, since routers can be
4059predicated upon the sender. If no arguments are given, read addresses from
4060stdin. Set debug_level to at least D_v to get full output for address testing.
4061*/
4062
4063if (verify_address_mode || address_test_mode)
4064 {
4065 int exit_value = 0;
4066 int flags = vopt_qualify;
4067
4068 if (verify_address_mode)
4069 {
4070 if (!verify_as_sender) flags |= vopt_is_recipient;
4071 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4072 }
4073
4074 else
4075 {
4076 flags |= vopt_is_recipient;
4077 debug_selector |= D_v;
4078 debug_file = stderr;
4079 debug_fd = fileno(debug_file);
4080 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4081 }
4082
4083 if (recipients_arg < argc)
4084 {
4085 while (recipients_arg < argc)
4086 {
4087 uschar *s = argv[recipients_arg++];
4088 while (*s != 0)
4089 {
4090 BOOL finished = FALSE;
4091 uschar *ss = parse_find_address_end(s, FALSE);
4092 if (*ss == ',') *ss = 0; else finished = TRUE;
4093 test_address(s, flags, &exit_value);
4094 s = ss;
4095 if (!finished)
4096 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4097 }
4098 }
4099 }
4100
4101 else for (;;)
4102 {
4103 uschar *s = get_stdinput(NULL, NULL);
4104 if (s == NULL) break;
4105 test_address(s, flags, &exit_value);
4106 }
4107
4108 route_tidyup();
4109 exim_exit(exit_value);
4110 }
4111
4112/* Handle expansion checking */
4113
4114if (expansion_test)
4115 {
4116 if (recipients_arg < argc)
4117 {
4118 while (recipients_arg < argc)
4119 {
4120 uschar *s = argv[recipients_arg++];
4121 uschar *ss = expand_string(s);
4122 if (ss == NULL)
4123 printf ("Failed: %s\n", expand_string_message);
4124 else printf("%s\n", CS ss);
4125 }
4126 }
4127
4128 /* Read stdin */
4129
4130 else
4131 {
4132 char *(*fn_readline)(char *) = NULL;
4133 char *(*fn_addhist)(char *) = NULL;
4134
4135 #ifdef USE_READLINE
4136 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4137 #endif
4138
4139 for (;;)
4140 {
4141 uschar *ss;
4142 uschar *source = get_stdinput(fn_readline, fn_addhist);
4143 if (source == NULL) break;
4144 ss = expand_string(source);
4145 if (ss == NULL)
4146 printf ("Failed: %s\n", expand_string_message);
4147 else printf("%s\n", CS ss);
4148 }
4149
4150 #ifdef USE_READLINE
4151 if (dlhandle != NULL) dlclose(dlhandle);
4152 #endif
4153 }
4154
4155 exim_exit(EXIT_SUCCESS);
4156 }
4157
4158
4159/* The active host name is normally the primary host name, but it can be varied
4160for hosts that want to play several parts at once. We need to ensure that it is
4161set for host checking, and for receiving messages. */
4162
4163smtp_active_hostname = primary_hostname;
4164if (raw_active_hostname != NULL)
4165 {
4166 uschar *nah = expand_string(raw_active_hostname);
4167 if (nah == NULL)
4168 {
4169 if (!expand_string_forcedfail)
4170 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "