Added -dd for daemon debugging.
[exim.git] / src / src / exim.c
CommitLineData
3d235903 1/* $Cambridge: exim/src/src/exim.c,v 1.8 2004/11/10 10:29:56 ph10 Exp $ */
059ec3d9
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2
3/*************************************************
4* Exim - an Internet mail transport agent *
5*************************************************/
6
7/* Copyright (c) University of Cambridge 1995 - 2004 */
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
PH
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. :-)
059ec3d9
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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 */
eb2c0248
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217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
059ec3d9
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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"));
409 if (devnull != i) dup2(devnull, i);
410 }
411 }
412if (devnull > 2) close(devnull);
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
462 close(fileno(smtp_in));
463 close(fileno(smtp_out));
464 smtp_in = NULL;
465 }
466else
467 {
468 close(0); /* stdin */
469 if ((debug_selector & D_resolver) == 0) close(1); /* stdout */
470 if (debug_selector == 0) /* stderr */
471 {
472 if (!synchronous_delivery)
473 {
474 close(2);
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.
589It also checks the syntax of the address.
590
591Argument:
592 address the address, with possible port on the end
593
594Returns: the port, or zero if there isn't one
595 bombs out on a syntax error
596*/
597
598static int
599check_port(uschar *address)
600{
601int port = host_extract_port(address);
602if (!string_is_ip_address(address, NULL))
603 {
604 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
605 exit(EXIT_FAILURE);
606 }
607return port;
608}
609
610
611
612/*************************************************
613* Test/verify an address *
614*************************************************/
615
616/* This function is called by the -bv and -bt code. It extracts a working
617address from a full RFC 822 address. This isn't really necessary per se, but it
618has the effect of collapsing source routes.
619
620Arguments:
621 s the address string
622 flags flag bits for verify_address()
623 exit_value to be set for failures
624
625Returns: nothint
626*/
627
628static void
629test_address(uschar *s, int flags, int *exit_value)
630{
631int start, end, domain;
632uschar *parse_error = NULL;
633uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
634 FALSE);
635if (address == NULL)
636 {
637 fprintf(stdout, "syntax error: %s\n", parse_error);
638 *exit_value = 2;
639 }
640else
641 {
642 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 643 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
644 if (rc == FAIL) *exit_value = 2;
645 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
646 }
647}
648
649
650
651/*************************************************
652* Decode bit settings for log/debug *
653*************************************************/
654
655/* This function decodes a string containing bit settings in the form of +name
656and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
657also recognizes a numeric setting of the form =<number>, but this is not
658intended for user use. It's an easy way for Exim to pass the debug settings
659when it is re-exec'ed.
660
661The log options are held in two unsigned ints (because there became too many
662for one). The top bit in the table means "put in 2nd selector". This does not
663yet apply to debug options, so the "=" facility sets only the first selector.
664
665A bad value for a debug setting is treated as an unknown option - error message
666to stderr and die. For log settings, which come from the configuration file,
667we write to the log on the way out...
668
669Arguments:
670 selector1 address of the first bit string
671 selector2 address of the second bit string, or NULL
672 string the configured string
673 options the table of option names
674 count size of table
675 which "log" or "debug"
676
677Returns: nothing on success - bomb out on failure
678*/
679
680static void
681decode_bits(unsigned int *selector1, unsigned int *selector2, uschar *string,
682 bit_table *options, int count, uschar *which)
683{
684uschar *errmsg;
685if (string == NULL) return;
686
687if (*string == '=')
688 {
689 char *end; /* Not uschar */
690 *selector1 = strtoul(CS string+1, &end, 0);
691 if (*end == 0) return;
692 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
693 string);
694 goto ERROR_RETURN;
695 }
696
697/* Handle symbolic setting */
698
699else for(;;)
700 {
701 BOOL adding;
702 uschar *s;
703 int len;
704 bit_table *start, *end;
705
706 while (isspace(*string)) string++;
707 if (*string == 0) return;
708
709 if (*string != '+' && *string != '-')
710 {
711 errmsg = string_sprintf("malformed %s_selector setting: "
712 "+ or - expected but found \"%s\"", which, string);
713 goto ERROR_RETURN;
714 }
715
716 adding = *string++ == '+';
717 s = string;
718 while (isalnum(*string) || *string == '_') string++;
719 len = string - s;
720
721 start = options;
722 end = options + count;
723
724 while (start < end)
725 {
726 bit_table *middle = start + (end - start)/2;
727 int c = Ustrncmp(s, middle->name, len);
728 if (c == 0)
729 {
730 if (middle->name[len] != 0) c = -1; else
731 {
732 unsigned int bit = middle->bit;
733 unsigned int *selector;
734
735 /* The value with all bits set means "set all bits in both selectors"
736 in the case where two are being handled. However, the top bit in the
737 second selector is never set. */
738
739 if (bit == 0xffffffff)
740 {
741 *selector1 = adding? bit : 0;
742 if (selector2 != NULL) *selector2 = adding? 0x7fffffff : 0;
743 }
744
745 /* Otherwise, the 0x80000000 bit means "this value, without the top
746 bit, belongs in the second selector". */
747
748 else
749 {
750 if ((bit & 0x80000000) != 0)
751 {
752 selector = selector2;
753 bit &= 0x7fffffff;
754 }
755 else selector = selector1;
756 if (adding) *selector |= bit; else *selector &= ~bit;
757 }
758 break; /* Out of loop to match selector name */
759 }
760 }
761 if (c < 0) end = middle; else start = middle + 1;
762 } /* Loop to match selector name */
763
764 if (start >= end)
765 {
766 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
767 adding? '+' : '-', len, s);
768 goto ERROR_RETURN;
769 }
770 } /* Loop for selector names */
771
772/* Handle disasters */
773
774ERROR_RETURN:
775if (Ustrcmp(which, "debug") == 0)
776 {
777 fprintf(stderr, "exim: %s\n", errmsg);
778 exit(EXIT_FAILURE);
779 }
780else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
781}
782
783
784
785/*************************************************
786* Show supported features *
787*************************************************/
788
789/* This function is called for -bV and for -d to output the optional features
790of the current Exim binary.
791
792Arguments: a FILE for printing
793Returns: nothing
794*/
795
796static void
797show_whats_supported(FILE *f)
798{
799#ifdef DB_VERSION_STRING
800fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
801#elif defined(BTREEVERSION) && defined(HASHVERSION)
802 #ifdef USE_DB
803 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
804 #else
805 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
806 #endif
807#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
808fprintf(f, "Probably ndbm\n");
809#elif defined(USE_TDB)
810fprintf(f, "Using tdb\n");
811#else
812 #ifdef USE_GDBM
813 fprintf(f, "Probably GDBM (native mode)\n");
814 #else
815 fprintf(f, "Probably GDBM (compatibility mode)\n");
816 #endif
817#endif
818
819fprintf(f, "Support for:");
820#if HAVE_ICONV
821 fprintf(f, " iconv()");
822#endif
823#if HAVE_IPV6
824 fprintf(f, " IPv6");
825#endif
826#ifdef SUPPORT_PAM
827 fprintf(f, " PAM");
828#endif
829#ifdef EXIM_PERL
830 fprintf(f, " Perl");
831#endif
832#ifdef USE_TCP_WRAPPERS
833 fprintf(f, " TCPwrappers");
834#endif
835#ifdef SUPPORT_TLS
836 #ifdef USE_GNUTLS
837 fprintf(f, " GnuTLS");
838 #else
839 fprintf(f, " OpenSSL");
840 #endif
841#endif
842fprintf(f, "\n");
843
844fprintf(f, "Lookups:");
845#ifdef LOOKUP_LSEARCH
846 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
847#endif
848#ifdef LOOKUP_CDB
849 fprintf(f, " cdb");
850#endif
851#ifdef LOOKUP_DBM
852 fprintf(f, " dbm dbmnz");
853#endif
854#ifdef LOOKUP_DNSDB
855 fprintf(f, " dnsdb");
856#endif
857#ifdef LOOKUP_DSEARCH
858 fprintf(f, " dsearch");
859#endif
860#ifdef LOOKUP_IBASE
861 fprintf(f, " ibase");
862#endif
863#ifdef LOOKUP_LDAP
864 fprintf(f, " ldap ldapdn ldapm");
865#endif
866#ifdef LOOKUP_MYSQL
867 fprintf(f, " mysql");
868#endif
869#ifdef LOOKUP_NIS
870 fprintf(f, " nis nis0");
871#endif
872#ifdef LOOKUP_NISPLUS
873 fprintf(f, " nisplus");
874#endif
875#ifdef LOOKUP_ORACLE
876 fprintf(f, " oracle");
877#endif
878#ifdef LOOKUP_PASSWD
879 fprintf(f, " passwd");
880#endif
881#ifdef LOOKUP_PGSQL
882 fprintf(f, " pgsql");
883#endif
884#ifdef LOOKUP_TESTDB
885 fprintf(f, " testdb");
886#endif
887#ifdef LOOKUP_WHOSON
888 fprintf(f, " whoson");
889#endif
890fprintf(f, "\n");
891
892fprintf(f, "Authenticators:");
893#ifdef AUTH_CRAM_MD5
894 fprintf(f, " cram_md5");
895#endif
896#ifdef AUTH_CYRUS_SASL
897 fprintf(f, " cyrus_sasl");
898#endif
899#ifdef AUTH_PLAINTEXT
900 fprintf(f, " plaintext");
901#endif
902#ifdef AUTH_SPA
903 fprintf(f, " spa");
904#endif
905fprintf(f, "\n");
906
907fprintf(f, "Routers:");
908#ifdef ROUTER_ACCEPT
909 fprintf(f, " accept");
910#endif
911#ifdef ROUTER_DNSLOOKUP
912 fprintf(f, " dnslookup");
913#endif
914#ifdef ROUTER_IPLITERAL
915 fprintf(f, " ipliteral");
916#endif
917#ifdef ROUTER_IPLOOKUP
918 fprintf(f, " iplookup");
919#endif
920#ifdef ROUTER_MANUALROUTE
921 fprintf(f, " manualroute");
922#endif
923#ifdef ROUTER_QUERYPROGRAM
924 fprintf(f, " queryprogram");
925#endif
926#ifdef ROUTER_REDIRECT
927 fprintf(f, " redirect");
928#endif
929fprintf(f, "\n");
930
931fprintf(f, "Transports:");
932#ifdef TRANSPORT_APPENDFILE
933 fprintf(f, " appendfile");
934 #ifdef SUPPORT_MAILDIR
935 fprintf(f, "/maildir");
936 #endif
937 #ifdef SUPPORT_MAILSTORE
938 fprintf(f, "/mailstore");
939 #endif
940 #ifdef SUPPORT_MBX
941 fprintf(f, "/mbx");
942 #endif
943#endif
944#ifdef TRANSPORT_AUTOREPLY
945 fprintf(f, " autoreply");
946#endif
947#ifdef TRANSPORT_LMTP
948 fprintf(f, " lmtp");
949#endif
950#ifdef TRANSPORT_PIPE
951 fprintf(f, " pipe");
952#endif
953#ifdef TRANSPORT_SMTP
954 fprintf(f, " smtp");
955#endif
956fprintf(f, "\n");
957
958if (fixed_never_users[0] > 0)
959 {
960 int i;
961 fprintf(f, "Fixed never_users: ");
962 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
963 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
964 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
965 }
966}
967
968
969
970
971/*************************************************
972* Quote a local part *
973*************************************************/
974
975/* This function is used when a sender address or a From: or Sender: header
976line is being created from the caller's login, or from an authenticated_id. It
977applies appropriate quoting rules for a local part.
978
979Argument: the local part
980Returns: the local part, quoted if necessary
981*/
982
983uschar *
984local_part_quote(uschar *lpart)
985{
986BOOL needs_quote = FALSE;
987int size, ptr;
988uschar *yield;
989uschar *t;
990
991for (t = lpart; !needs_quote && *t != 0; t++)
992 {
993 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
994 (*t != '.' || t == lpart || t[1] == 0);
995 }
996
997if (!needs_quote) return lpart;
998
999size = ptr = 0;
1000yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1001
1002for (;;)
1003 {
1004 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1005 if (nq == NULL)
1006 {
1007 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1008 break;
1009 }
1010 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1011 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1012 yield = string_cat(yield, &size, &ptr, nq, 1);
1013 lpart = nq + 1;
1014 }
1015
1016yield = string_cat(yield, &size, &ptr, US"\"", 1);
1017yield[ptr] = 0;
1018return yield;
1019}
1020
1021
1022
1023#ifdef USE_READLINE
1024/*************************************************
1025* Load readline() functions *
1026*************************************************/
1027
1028/* This function is called from testing executions that read data from stdin,
1029but only when running as the calling user. Currently, only -be does this. The
1030function loads the readline() function library and passes back the functions.
1031On some systems, it needs the curses library, so load that too, but try without
1032it if loading fails. All this functionality has to be requested at build time.
1033
1034Arguments:
1035 fn_readline_ptr pointer to where to put the readline pointer
1036 fn_addhist_ptr pointer to where to put the addhistory function
1037
1038Returns: the dlopen handle or NULL on failure
1039*/
1040
1041static void *
1042set_readline(char * (**fn_readline_ptr)(char *),
1043 char * (**fn_addhist_ptr)(char *))
1044{
1045void *dlhandle;
1046void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1047
1048dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1049if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1050
1051if (dlhandle != NULL)
1052 {
1053 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1054 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1055 }
1056else
1057 {
1058 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1059 }
1060
1061return dlhandle;
1062}
1063#endif
1064
1065
1066
1067/*************************************************
1068* Get a line from stdin for testing things *
1069*************************************************/
1070
1071/* This function is called when running tests that can take a number of lines
1072of input (for example, -be and -bt). It handles continuations and trailing
1073spaces. And prompting and a blank line output on eof. If readline() is in use,
1074the arguments are non-NULL and provide the relevant functions.
1075
1076Arguments:
1077 fn_readline readline function or NULL
1078 fn_addhist addhist function or NULL
1079
1080Returns: pointer to dynamic memory, or NULL at end of file
1081*/
1082
1083static uschar *
1084get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1085{
1086int i;
1087int size = 0;
1088int ptr = 0;
1089uschar *yield = NULL;
1090
1091if (fn_readline == NULL) printf("> ");
1092
1093for (i = 0;; i++)
1094 {
1095 uschar buffer[1024];
1096 uschar *p, *ss;
1097
1098 #ifdef USE_READLINE
1099 char *readline_line = NULL;
1100 if (fn_readline != NULL)
1101 {
1102 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1103 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1104 p = US readline_line;
1105 }
1106 else
1107 #endif
1108
1109 /* readline() not in use */
1110
1111 {
1112 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1113 p = buffer;
1114 }
1115
1116 /* Handle the line */
1117
1118 ss = p + (int)Ustrlen(p);
1119 while (ss > p && isspace(ss[-1])) ss--;
1120
1121 if (i > 0)
1122 {
1123 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1124 }
1125
1126 yield = string_cat(yield, &size, &ptr, p, ss - p);
1127
1128 #ifdef USE_READLINE
1129 if (fn_readline != NULL) free(readline_line);
1130 #endif
1131
1132 if (ss == p || yield[ptr-1] != '\\')
1133 {
1134 yield[ptr] = 0;
1135 break;
1136 }
1137 yield[--ptr] = 0;
1138 }
1139
1140if (yield == NULL) printf("\n");
1141return yield;
1142}
1143
1144
1145
1146/*************************************************
1147* Entry point and high-level code *
1148*************************************************/
1149
1150/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1151the appropriate action. All the necessary functions are present in the one
1152binary. I originally thought one should split it up, but it turns out that so
1153much of the apparatus is needed in each chunk that one might as well just have
1154it all available all the time, which then makes the coding easier as well.
1155
1156Arguments:
1157 argc count of entries in argv
1158 argv argument strings, with argv[0] being the program name
1159
1160Returns: EXIT_SUCCESS if terminated successfully
1161 EXIT_FAILURE otherwise, except when a message has been sent
1162 to the sender, and -oee was given
1163*/
1164
1165int
1166main(int argc, char **cargv)
1167{
1168uschar **argv = USS cargv;
1169int arg_receive_timeout = -1;
1170int arg_smtp_receive_timeout = -1;
1171int arg_error_handling = error_handling;
1172int filter_fd = -1;
1173int group_count;
1174int i;
1175int list_queue_option = 0;
1176int msg_action = 0;
1177int msg_action_arg = -1;
1178int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1179int queue_only_reason = 0;
1180#ifdef EXIM_PERL
1181int perl_start_option = 0;
1182#endif
1183int recipients_arg = argc;
1184int sender_address_domain = 0;
1185int test_retry_arg = -1;
1186int test_rewrite_arg = -1;
1187BOOL arg_queue_only = FALSE;
1188BOOL bi_option = FALSE;
1189BOOL checking = FALSE;
1190BOOL count_queue = FALSE;
1191BOOL expansion_test = FALSE;
1192BOOL extract_recipients = FALSE;
1193BOOL forced_delivery = FALSE;
1194BOOL f_end_dot = FALSE;
1195BOOL deliver_give_up = FALSE;
1196BOOL list_queue = FALSE;
1197BOOL list_options = FALSE;
1198BOOL local_queue_only;
1199BOOL more = TRUE;
1200BOOL one_msg_action = FALSE;
1201BOOL queue_only_set = FALSE;
1202BOOL receiving_message = TRUE;
1203BOOL unprivileged;
1204BOOL removed_privilege = FALSE;
1205BOOL verify_address_mode = FALSE;
1206BOOL verify_as_sender = FALSE;
1207BOOL version_printed = FALSE;
1208uschar *alias_arg = NULL;
1209uschar *called_as = US"";
1210uschar *start_queue_run_id = NULL;
1211uschar *stop_queue_run_id = NULL;
1212uschar *ftest_domain = NULL;
1213uschar *ftest_localpart = NULL;
1214uschar *ftest_prefix = NULL;
1215uschar *ftest_suffix = NULL;
1216uschar *real_sender_address;
1217uschar *originator_home = US"/";
1218BOOL ftest_system = FALSE;
1219void *reset_point;
1220
1221struct passwd *pw;
1222struct stat statbuf;
1223pid_t passed_qr_pid = (pid_t)0;
1224int passed_qr_pipe = -1;
1225gid_t group_list[NGROUPS_MAX];
1226
1227/* Possible options for -R and -S */
1228
1229static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1230
1231/* Need to define this in case we need to change the environment in order
1232to get rid of a bogus time zone. We have to make it char rather than uschar
1233because some OS define it in /usr/include/unistd.h. */
1234
1235extern char **environ;
1236
35edf2ff 1237/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1238defined by ref:name at build time, we must now find the actual uid/gid values.
1239This is a feature to make the lives of binary distributors easier. */
1240
1241#ifdef EXIM_USERNAME
1242if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1243 {
1244 exim_gid = pw->pw_gid;
1245 }
1246else
1247 {
1248 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1249 EXIM_USERNAME);
1250 exit(EXIT_FAILURE);
1251 }
1252#endif
1253
1254#ifdef EXIM_GROUPNAME
1255if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1256 {
1257 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1258 EXIM_GROUPNAME);
1259 exit(EXIT_FAILURE);
1260 }
1261#endif
1262
1263#ifdef CONFIGURE_OWNERNAME
1264if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1265 {
1266 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1267 CONFIGURE_OWNERNAME);
1268 exit(EXIT_FAILURE);
1269 }
1270#endif
1271
35edf2ff
PH
1272#ifdef CONFIGURE_GROUPNAME
1273if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1274 {
1275 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1276 CONFIGURE_GROUPNAME);
1277 exit(EXIT_FAILURE);
1278 }
1279#endif
1280
059ec3d9
PH
1281/* In the Cygwin environment, some initialization needs doing. It is fudged
1282in by means of this macro. */
1283
1284#ifdef OS_INIT
1285OS_INIT
1286#endif
1287
1288/* Check a field which is patched when we are running Exim within its
1289testing harness; do a fast initial check, and then the whole thing. */
1290
1291running_in_test_harness =
1292 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1293
1294/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1295at the start of a program; however, it seems that some environments do not
1296follow this. A "strange" locale can affect the formatting of timestamps, so we
1297make quite sure. */
1298
1299setlocale(LC_ALL, "C");
1300
1301/* Set up the default handler for timing using alarm(). */
1302
1303os_non_restarting_signal(SIGALRM, sigalrm_handler);
1304
1305/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1306because store_malloc writes a log entry on failure. */
1307
1308log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1309if (log_buffer == NULL)
1310 {
1311 fprintf(stderr, "exim: failed to get store for log buffer\n");
1312 exit(EXIT_FAILURE);
1313 }
1314
1315/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1316NULL when the daemon is run and the file is closed. We have to use this
1317indirection, because some systems don't allow writing to the variable "stderr".
1318*/
1319
1320if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1321
1322/* Arrange for the PCRE regex library to use our store functions. Note that
1323the normal calls are actually macros that add additional arguments for
1324debugging purposes so we have to assign specially constructed functions here.
1325The default is to use store in the stacking pool, but this is overridden in the
1326regex_must_compile() function. */
1327
1328pcre_malloc = function_store_get;
1329pcre_free = function_dummy_free;
1330
1331/* Ensure there is a big buffer for temporary use in several places. It is put
1332in malloc store so that it can be freed for enlargement if necessary. */
1333
1334big_buffer = store_malloc(big_buffer_size);
1335
1336/* Set up the handler for the data request signal, and set the initial
1337descriptive text. */
1338
1339set_process_info("initializing");
1340os_restarting_signal(SIGUSR1, usr1_handler);
1341
1342/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1343in the daemon code. For the rest of Exim's uses, we ignore it. */
1344
1345signal(SIGHUP, SIG_IGN);
1346
1347/* We don't want to die on pipe errors as the code is written to handle
1348the write error instead. */
1349
1350signal(SIGPIPE, SIG_IGN);
1351
1352/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1353set to SIG_IGN. This causes subprocesses that complete before the parent
1354process waits for them not to hang around, so when Exim calls wait(), nothing
1355is there. The wait() code has been made robust against this, but let's ensure
1356that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1357ending status. We use sigaction rather than plain signal() on those OS where
1358SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1359problem on AIX with this.) */
1360
1361#ifdef SA_NOCLDWAIT
1362 {
1363 struct sigaction act;
1364 act.sa_handler = SIG_DFL;
1365 sigemptyset(&(act.sa_mask));
1366 act.sa_flags = 0;
1367 sigaction(SIGCHLD, &act, NULL);
1368 }
1369#else
1370signal(SIGCHLD, SIG_DFL);
1371#endif
1372
1373/* Save the arguments for use if we re-exec exim as a daemon after receiving
1374SIGHUP. */
1375
1376sighup_argv = argv;
1377
1378/* Set up the version number. Set up the leading 'E' for the external form of
1379message ids, set the pointer to the internal form, and initialize it to
1380indicate no message being processed. */
1381
1382version_init();
1383message_id_option[0] = '-';
1384message_id_external = message_id_option + 1;
1385message_id_external[0] = 'E';
1386message_id = message_id_external + 1;
1387message_id[0] = 0;
1388
1389/* Set the umask to zero so that any files that Exim creates are created
1390with the modes that it specifies. */
1391
1392umask(0);
1393
1394/* Precompile the regular expression for matching a message id. Keep this in
1395step with the code that generates ids in the accept.c module. We need to do
1396this here, because the -M options check their arguments for syntactic validity
1397using mac_ismsgid, which uses this. */
1398
1399regex_ismsgid =
1400 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1401
1402/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1403this seems to be a generally accepted convention, since one finds symbolic
1404links called "mailq" in standard OS configurations. */
1405
1406if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1407 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1408 {
1409 list_queue = TRUE;
1410 receiving_message = FALSE;
1411 called_as = US"-mailq";
1412 }
1413
1414/* If the program is called as "rmail" treat it as equivalent to
1415"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1416i.e. preventing a single dot on a line from terminating the message, and
1417returning with zero return code, even in cases of error (provided an error
1418message has been sent). */
1419
1420if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1421 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1422 {
1423 dot_ends = FALSE;
1424 called_as = US"-rmail";
1425 errors_sender_rc = EXIT_SUCCESS;
1426 }
1427
1428/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1429this is a smail convention. */
1430
1431if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1432 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1433 {
1434 smtp_input = smtp_batched_input = TRUE;
1435 called_as = US"-rsmtp";
1436 }
1437
1438/* If the program is called as "runq" treat it as equivalent to "exim -q";
1439this is a smail convention. */
1440
1441if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1442 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1443 {
1444 queue_interval = 0;
1445 receiving_message = FALSE;
1446 called_as = US"-runq";
1447 }
1448
1449/* If the program is called as "newaliases" treat it as equivalent to
1450"exim -bi"; this is a sendmail convention. */
1451
1452if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1453 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1454 {
1455 bi_option = TRUE;
1456 receiving_message = FALSE;
1457 called_as = US"-newaliases";
1458 }
1459
1460/* Save the original effective uid for a couple of uses later. It should
1461normally be root, but in some esoteric environments it may not be. */
1462
1463original_euid = geteuid();
1464
1465/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1466to be the same as the real ones. This makes a difference only if Exim is setuid
1467(or setgid) to something other than root, which could be the case in some
1468special configurations. */
1469
1470real_uid = getuid();
1471real_gid = getgid();
1472
1473if (real_uid == root_uid)
1474 {
1475 setgid(real_gid);
1476 setuid(real_uid);
1477 }
1478
1479/* If neither the original real uid nor the original euid was root, Exim is
1480running in an unprivileged state. */
1481
1482unprivileged = (real_uid != root_uid && original_euid != root_uid);
1483
1484/* If the first argument is --help, pretend there are no arguments. This will
1485cause a brief message to be given. */
1486
1487if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1488
1489/* Scan the program's arguments. Some can be dealt with right away; others are
1490simply recorded for checking and handling afterwards. Do a high-level switch
1491on the second character (the one after '-'), to save some effort. */
1492
1493for (i = 1; i < argc; i++)
1494 {
1495 BOOL badarg = FALSE;
1496 uschar *arg = argv[i];
1497 uschar *argrest;
1498 int switchchar;
1499
1500 /* An argument not starting with '-' is the start of a recipients list;
1501 break out of the options-scanning loop. */
1502
1503 if (arg[0] != '-')
1504 {
1505 recipients_arg = i;
1506 break;
1507 }
1508
1509 /* An option consistion of -- terminates the options */
1510
1511 if (Ustrcmp(arg, "--") == 0)
1512 {
1513 recipients_arg = i + 1;
1514 break;
1515 }
1516
1517 /* Handle flagged options */
1518
1519 switchchar = arg[1];
1520 argrest = arg+2;
1521
1522 /* Make all -ex options synonymous with -oex arguments, since that
1523 is assumed by various callers. Also make -qR options synonymous with -R
1524 options, as that seems to be required as well. Allow for -qqR too, and
1525 the same for -S options. */
1526
1527 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1528 Ustrncmp(arg+1, "qR", 2) == 0 ||
1529 Ustrncmp(arg+1, "qS", 2) == 0)
1530 {
1531 switchchar = arg[2];
1532 argrest++;
1533 }
1534 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1535 {
1536 switchchar = arg[3];
1537 argrest += 2;
1538 queue_2stage = TRUE;
1539 }
1540
1541 /* Make -r synonymous with -f, since it is a documented alias */
1542
1543 else if (arg[1] == 'r') switchchar = 'f';
1544
1545 /* Make -ov synonymous with -v */
1546
1547 else if (Ustrcmp(arg, "-ov") == 0)
1548 {
1549 switchchar = 'v';
1550 argrest++;
1551 }
1552
1553 /* High-level switch on active initial letter */
1554
1555 switch(switchchar)
1556 {
1557 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1558 so has no need of it. */
1559
1560 case 'B':
1561 if (*argrest == 0) i++; /* Skip over the type */
1562 break;
1563
1564
1565 case 'b':
1566 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1567
1568 /* -bd: Run in daemon mode, awaiting SMTP connections.
1569 -bdf: Ditto, but in the foreground.
1570 */
1571
1572 if (*argrest == 'd')
1573 {
1574 daemon_listen = TRUE;
1575 if (*(++argrest) == 'f') background_daemon = FALSE;
1576 else if (*argrest != 0) { badarg = TRUE; break; }
1577 }
1578
1579 /* -be: Run in expansion test mode */
1580
1581 else if (*argrest == 'e')
1582 expansion_test = checking = TRUE;
1583
1584 /* -bf: Run in mail filter testing mode
1585 -bF: Ditto, but for system filters
1586 -bfd: Set domain for filter testing
1587 -bfl: Set local part for filter testing
1588 -bfp: Set prefix for filter testing
1589 -bfs: Set suffix for filter testing
1590 */
1591
1592 else if (*argrest == 'f' || *argrest == 'F')
1593 {
1594 ftest_system = *argrest++ == 'F';
1595 if (*argrest == 0)
1596 {
1597 if(++i < argc) filter_test = argv[i]; else
1598 {
1599 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1600 exit(EXIT_FAILURE);
1601 }
1602 }
1603 else
1604 {
1605 if (++i >= argc)
1606 {
1607 fprintf(stderr, "exim: string expected after %s\n", arg);
1608 exit(EXIT_FAILURE);
1609 }
1610 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1611 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1612 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1613 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1614 else { badarg = TRUE; break; }
1615 }
1616 }
1617
1618 /* -bh: Host checking - an IP address must follow. */
1619
1620 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1621 {
1622 if (++i >= argc) { badarg = TRUE; break; }
1623 sender_host_address = argv[i];
1624 host_checking = checking = log_testing_mode = TRUE;
1625 host_checking_callout = argrest[1] == 'c';
1626 }
1627
1628 /* -bi: This option is used by sendmail to initialize *the* alias file,
1629 though it has the -oA option to specify a different file. Exim has no
1630 concept of *the* alias file, but since Sun's YP make script calls
1631 sendmail this way, some support must be provided. */
1632
1633 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1634
1635 /* -bm: Accept and deliver message - the default option. Reinstate
1636 receiving_message, which got turned off for all -b options. */
1637
1638 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1639
1640 /* -bnq: For locally originating messages, do not qualify unqualified
1641 addresses. In the envelope, this causes errors; in header lines they
1642 just get left. */
1643
1644 else if (Ustrcmp(argrest, "nq") == 0)
1645 {
1646 allow_unqualified_sender = FALSE;
1647 allow_unqualified_recipient = FALSE;
1648 }
1649
1650 /* -bpxx: List the contents of the mail queue, in various forms. If
1651 the option is -bpc, just a queue count is needed. Otherwise, if the
1652 first letter after p is r, then order is random. */
1653
1654 else if (*argrest == 'p')
1655 {
1656 if (*(++argrest) == 'c')
1657 {
1658 count_queue = TRUE;
1659 if (*(++argrest) != 0) badarg = TRUE;
1660 break;
1661 }
1662
1663 if (*argrest == 'r')
1664 {
1665 list_queue_option = 8;
1666 argrest++;
1667 }
1668 else list_queue_option = 0;
1669
1670 list_queue = TRUE;
1671
1672 /* -bp: List the contents of the mail queue, top-level only */
1673
1674 if (*argrest == 0) {}
1675
1676 /* -bpu: List the contents of the mail queue, top-level undelivered */
1677
1678 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1679
1680 /* -bpa: List the contents of the mail queue, including all delivered */
1681
1682 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1683
1684 /* Unknown after -bp[r] */
1685
1686 else
1687 {
1688 badarg = TRUE;
1689 break;
1690 }
1691 }
1692
1693
1694 /* -bP: List the configuration variables given as the address list.
1695 Force -v, so configuration errors get displayed. */
1696
1697 else if (Ustrcmp(argrest, "P") == 0)
1698 {
1699 list_options = TRUE;
1700 debug_selector |= D_v;
1701 debug_file = stderr;
1702 }
1703
1704 /* -brt: Test retry configuration lookup */
1705
1706 else if (Ustrcmp(argrest, "rt") == 0)
1707 {
1708 test_retry_arg = i + 1;
1709 goto END_ARG;
1710 }
1711
1712 /* -brw: Test rewrite configuration */
1713
1714 else if (Ustrcmp(argrest, "rw") == 0)
1715 {
1716 test_rewrite_arg = i + 1;
1717 goto END_ARG;
1718 }
1719
1720 /* -bS: Read SMTP commands on standard input, but produce no replies -
1721 all errors are reported by sending messages. */
1722
1723 else if (Ustrcmp(argrest, "S") == 0)
1724 smtp_input = smtp_batched_input = receiving_message = TRUE;
1725
1726 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1727 on standard output. */
1728
1729 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1730
1731 /* -bt: address testing mode */
1732
1733 else if (Ustrcmp(argrest, "t") == 0)
1734 address_test_mode = checking = log_testing_mode = TRUE;
1735
1736 /* -bv: verify addresses */
1737
1738 else if (Ustrcmp(argrest, "v") == 0)
1739 verify_address_mode = checking = log_testing_mode = TRUE;
1740
1741 /* -bvs: verify sender addresses */
1742
1743 else if (Ustrcmp(argrest, "vs") == 0)
1744 {
1745 verify_address_mode = checking = log_testing_mode = TRUE;
1746 verify_as_sender = TRUE;
1747 }
1748
1749 /* -bV: Print version string and support details */
1750
1751 else if (Ustrcmp(argrest, "V") == 0)
1752 {
1753 printf("Exim version %s #%s built %s\n", version_string,
1754 version_cnumber, version_date);
1755 printf("%s\n", CS version_copyright);
1756 version_printed = TRUE;
1757 show_whats_supported(stdout);
1758 }
1759
1760 else badarg = TRUE;
1761 break;
1762
1763
1764 /* -C: change configuration file list; ignore if it isn't really
1765 a change! Enforce a prefix check if required. */
1766
1767 case 'C':
1768 if (*argrest == 0)
1769 {
1770 if(++i < argc) argrest = argv[i]; else
1771 { badarg = TRUE; break; }
1772 }
1773 if (Ustrcmp(config_main_filelist, argrest) != 0)
1774 {
1775 #ifdef ALT_CONFIG_PREFIX
1776 int sep = 0;
1777 int len = Ustrlen(ALT_CONFIG_PREFIX);
1778 uschar *list = argrest;
1779 uschar *filename;
1780 while((filename = string_nextinlist(&list, &sep, big_buffer,
1781 big_buffer_size)) != NULL)
1782 {
1783 if ((Ustrlen(filename) < len ||
1784 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1785 Ustrstr(filename, "/../") != NULL) &&
1786 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1787 {
1788 fprintf(stderr, "-C Permission denied\n");
1789 exit(EXIT_FAILURE);
1790 }
1791 }
1792 #endif
1793
1794 config_main_filelist = argrest;
1795 config_changed = TRUE;
1796 }
1797 break;
1798
1799
1800 /* -D: set up a macro definition */
1801
1802 case 'D':
1803 #ifdef DISABLE_D_OPTION
1804 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1805 exit(EXIT_FAILURE);
1806 #else
1807 {
1808 int ptr = 0;
1809 macro_item *mlast = NULL;
1810 macro_item *m;
1811 uschar name[24];
1812 uschar *s = argrest;
1813
1814 while (isspace(*s)) s++;
1815
1816 if (*s < 'A' || *s > 'Z')
1817 {
1818 fprintf(stderr, "exim: macro name set by -D must start with "
1819 "an upper case letter\n");
1820 exit(EXIT_FAILURE);
1821 }
1822
1823 while (isalnum(*s) || *s == '_')
1824 {
1825 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1826 s++;
1827 }
1828 name[ptr] = 0;
1829 if (ptr == 0) { badarg = TRUE; break; }
1830 while (isspace(*s)) s++;
1831 if (*s != 0)
1832 {
1833 if (*s++ != '=') { badarg = TRUE; break; }
1834 while (isspace(*s)) s++;
1835 }
1836
1837 for (m = macros; m != NULL; m = m->next)
1838 {
1839 if (Ustrcmp(m->name, name) == 0)
1840 {
1841 fprintf(stderr, "exim: duplicated -D in command line\n");
1842 exit(EXIT_FAILURE);
1843 }
1844 mlast = m;
1845 }
1846
1847 m = store_get(sizeof(macro_item) + Ustrlen(name));
1848 m->next = NULL;
1849 m->command_line = TRUE;
1850 if (mlast == NULL) macros = m; else mlast->next = m;
1851 Ustrcpy(m->name, name);
1852 m->replacement = string_copy(s);
1853
1854 if (clmacro_count >= MAX_CLMACROS)
1855 {
1856 fprintf(stderr, "exim: too many -D options on command line\n");
1857 exit(EXIT_FAILURE);
1858 }
1859 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1860 m->replacement);
1861 }
1862 #endif
1863 break;
1864
1865 /* -d: Set debug level (see also -v below) or set the drop_cr option.
3d235903
PH
1866 The latter is now a no-op, retained for compatibility only. If -dd is used,
1867 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
1868
1869 case 'd':
1870 if (Ustrcmp(argrest, "ropcr") == 0)
1871 {
1872 /* drop_cr = TRUE; */
1873 }
1874
1875 /* Use an intermediate variable so that we don't set debugging while
1876 decoding the debugging bits. */
1877
1878 else
1879 {
1880 unsigned int selector = D_default;
1881 debug_selector = 0;
1882 debug_file = NULL;
3d235903
PH
1883 if (*argrest == 'd')
1884 {
1885 debug_daemon = TRUE;
1886 argrest++;
1887 }
059ec3d9
PH
1888 if (*argrest != 0)
1889 decode_bits(&selector, NULL, argrest, debug_options,
1890 debug_options_count, US"debug");
1891 debug_selector = selector;
1892 }
1893 break;
1894
1895
1896 /* -E: This is a local error message. This option is not intended for
1897 external use at all, but is not restricted to trusted callers because it
1898 does no harm (just suppresses certain error messages) and if Exim is run
1899 not setuid root it won't always be trusted when it generates error
1900 messages using this option. If there is a message id following -E, point
1901 message_reference at it, for logging. */
1902
1903 case 'E':
1904 local_error_message = TRUE;
1905 if (mac_ismsgid(argrest)) message_reference = argrest;
1906 break;
1907
1908
1909 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1910 option, so it looks as if historically the -oex options are also callable
1911 without the leading -o. So we have to accept them. Before the switch,
1912 anything starting -oe has been converted to -e. Exim does not support all
1913 of the sendmail error options. */
1914
1915 case 'e':
1916 if (Ustrcmp(argrest, "e") == 0)
1917 {
1918 arg_error_handling = ERRORS_SENDER;
1919 errors_sender_rc = EXIT_SUCCESS;
1920 }
1921 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1922 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1923 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1924 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1925 else badarg = TRUE;
1926 break;
1927
1928
1929 /* -F: Set sender's full name, used instead of the gecos entry from
1930 the password file. Since users can usually alter their gecos entries,
1931 there's no security involved in using this instead. The data can follow
1932 the -F or be in the next argument. */
1933
1934 case 'F':
1935 if (*argrest == 0)
1936 {
1937 if(++i < argc) argrest = argv[i]; else
1938 { badarg = TRUE; break; }
1939 }
1940 originator_name = argrest;
1941 break;
1942
1943
1944 /* -f: Set sender's address - this value is only actually used if Exim is
1945 run by a trusted user, or if untrusted_set_sender is set and matches the
1946 address, except that the null address can always be set by any user. The
1947 test for this happens later, when the value given here is ignored when not
1948 permitted. For an untrusted user, the actual sender is still put in Sender:
1949 if it doesn't match the From: header (unless no_local_from_check is set).
1950 The data can follow the -f or be in the next argument. The -r switch is an
1951 obsolete form of -f but since there appear to be programs out there that
1952 use anything that sendmail has ever supported, better accept it - the
1953 synonymizing is done before the switch above.
1954
1955 At this stage, we must allow domain literal addresses, because we don't
1956 know what the setting of allow_domain_literals is yet. Ditto for trailing
1957 dots and strip_trailing_dot. */
1958
1959 case 'f':
1960 {
1961 int start, end;
1962 uschar *errmess;
1963 if (*argrest == 0)
1964 {
1965 if (i+1 < argc) argrest = argv[++i]; else
1966 { badarg = TRUE; break; }
1967 }
1968 if (*argrest == 0)
1969 {
1970 sender_address = string_sprintf(""); /* Ensure writeable memory */
1971 }
1972 else
1973 {
1974 uschar *temp = argrest + Ustrlen(argrest) - 1;
1975 while (temp >= argrest && isspace(*temp)) temp--;
1976 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
1977 allow_domain_literals = TRUE;
1978 strip_trailing_dot = TRUE;
1979 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
1980 &sender_address_domain, TRUE);
1981 allow_domain_literals = FALSE;
1982 strip_trailing_dot = FALSE;
1983 if (sender_address == NULL)
1984 {
1985 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
1986 return EXIT_FAILURE;
1987 }
1988 }
1989 sender_address_forced = TRUE;
1990 }
1991 break;
1992
1993 /* This is some Sendmail thing which can be ignored */
1994
1995 case 'G':
1996 break;
1997
1998 /* -h: Set the hop count for an incoming message. Exim does not currently
1999 support this; it always computes it by counting the Received: headers.
2000 To put it in will require a change to the spool header file format. */
2001
2002 case 'h':
2003 if (*argrest == 0)
2004 {
2005 if(++i < argc) argrest = argv[i]; else
2006 { badarg = TRUE; break; }
2007 }
2008 if (!isdigit(*argrest)) badarg = TRUE;
2009 break;
2010
2011
2012 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2013 not to be documented for sendmail but mailx (at least) uses it) */
2014
2015 case 'i':
2016 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2017 break;
2018
2019
2020 case 'M':
2021 receiving_message = FALSE;
2022
2023 /* -MC: continue delivery of another message via an existing open
2024 file descriptor. This option is used for an internal call by the
2025 smtp transport when there is a pending message waiting to go to an
2026 address to which it has got a connection. Five subsequent arguments are
2027 required: transport name, host name, IP address, sequence number, and
2028 message_id. Transports may decline to create new processes if the sequence
2029 number gets too big. The channel is stdin. This (-MC) must be the last
2030 argument. There's a subsequent check that the real-uid is privileged.
2031
2032 If we are running in the test harness. delay for a bit, to let the process
2033 that set this one up complete. This makes for repeatability of the logging,
2034 etc. output. */
2035
2036 if (Ustrcmp(argrest, "C") == 0)
2037 {
2038 if (argc != i + 6)
2039 {
2040 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2041 return EXIT_FAILURE;
2042 }
2043
2044 if (msg_action_arg >= 0)
2045 {
2046 fprintf(stderr, "exim: incompatible arguments\n");
2047 return EXIT_FAILURE;
2048 }
2049
2050 continue_transport = argv[++i];
2051 continue_hostname = argv[++i];
2052 continue_host_address = argv[++i];
2053 continue_sequence = Uatoi(argv[++i]);
2054 msg_action = MSG_DELIVER;
2055 msg_action_arg = ++i;
2056 forced_delivery = TRUE;
2057 queue_run_pid = passed_qr_pid;
2058 queue_run_pipe = passed_qr_pipe;
2059
2060 if (!mac_ismsgid(argv[i]))
2061 {
2062 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2063 argv[i]);
2064 return EXIT_FAILURE;
2065 }
2066
2067 if (running_in_test_harness) millisleep(500);
2068 break;
2069 }
2070
2071 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2072 precedes -MC (see above). The flag indicates that the host to which
2073 Exim is connected has accepted an AUTH sequence. */
2074
2075 else if (Ustrcmp(argrest, "CA") == 0)
2076 {
2077 smtp_authenticated = TRUE;
2078 break;
2079 }
2080
2081 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2082 it preceded -MC (see above) */
2083
2084 else if (Ustrcmp(argrest, "CP") == 0)
2085 {
2086 smtp_use_pipelining = TRUE;
2087 break;
2088 }
2089
2090 /* -MCQ: pass on the pid of the queue-running process that started
2091 this chain of deliveries and the fd of its synchronizing pipe; this
2092 is useful only when it precedes -MC (see above) */
2093
2094 else if (Ustrcmp(argrest, "CQ") == 0)
2095 {
2096 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2097 else badarg = TRUE;
2098 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2099 else badarg = TRUE;
2100 break;
2101 }
2102
2103 /* -MCS: set the smtp_use_size flag; this is useful only when it
2104 precedes -MC (see above) */
2105
2106 else if (Ustrcmp(argrest, "CS") == 0)
2107 {
2108 smtp_use_size = TRUE;
2109 break;
2110 }
2111
2112 /* -MCT: set the tls_offered flag; this is useful only when it
2113 precedes -MC (see above). The flag indicates that the host to which
2114 Exim is connected has offered TLS support. */
2115
2116 #ifdef SUPPORT_TLS
2117 else if (Ustrcmp(argrest, "CT") == 0)
2118 {
2119 tls_offered = TRUE;
2120 break;
2121 }
2122 #endif
2123
2124 /* -M[x]: various operations on the following list of message ids:
2125 -M deliver the messages, ignoring next retry times and thawing
2126 -Mc deliver the messages, checking next retry times, no thawing
2127 -Mf freeze the messages
2128 -Mg give up on the messages
2129 -Mt thaw the messages
2130 -Mrm remove the messages
2131 In the above cases, this must be the last option. There are also the
2132 following options which are followed by a single message id, and which
2133 act on that message. Some of them use the "recipient" addresses as well.
2134 -Mar add recipient(s)
2135 -Mmad mark all recipients delivered
2136 -Mmd mark recipients(s) delivered
2137 -Mes edit sender
2138 -Mvb show body
2139 -Mvh show header
2140 -Mvl show log
2141 */
2142
2143 else if (*argrest == 0)
2144 {
2145 msg_action = MSG_DELIVER;
2146 forced_delivery = deliver_force_thaw = TRUE;
2147 }
2148 else if (Ustrcmp(argrest, "ar") == 0)
2149 {
2150 msg_action = MSG_ADD_RECIPIENT;
2151 one_msg_action = TRUE;
2152 }
2153 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2154 else if (Ustrcmp(argrest, "es") == 0)
2155 {
2156 msg_action = MSG_EDIT_SENDER;
2157 one_msg_action = TRUE;
2158 }
2159 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2160 else if (Ustrcmp(argrest, "g") == 0)
2161 {
2162 msg_action = MSG_DELIVER;
2163 deliver_give_up = TRUE;
2164 }
2165 else if (Ustrcmp(argrest, "mad") == 0)
2166 {
2167 msg_action = MSG_MARK_ALL_DELIVERED;
2168 }
2169 else if (Ustrcmp(argrest, "md") == 0)
2170 {
2171 msg_action = MSG_MARK_DELIVERED;
2172 one_msg_action = TRUE;
2173 }
2174 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2175 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2176 else if (Ustrcmp(argrest, "vb") == 0)
2177 {
2178 msg_action = MSG_SHOW_BODY;
2179 one_msg_action = TRUE;
2180 }
2181 else if (Ustrcmp(argrest, "vh") == 0)
2182 {
2183 msg_action = MSG_SHOW_HEADER;
2184 one_msg_action = TRUE;
2185 }
2186 else if (Ustrcmp(argrest, "vl") == 0)
2187 {
2188 msg_action = MSG_SHOW_LOG;
2189 one_msg_action = TRUE;
2190 }
2191 else { badarg = TRUE; break; }
2192
2193 /* All the -Mxx options require at least one message id. */
2194
2195 msg_action_arg = i + 1;
2196 if (msg_action_arg >= argc)
2197 {
2198 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2199 return EXIT_FAILURE;
2200 }
2201
2202 /* Some require only message ids to follow */
2203
2204 if (!one_msg_action)
2205 {
2206 int j;
2207 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2208 {
2209 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2210 argv[j], arg);
2211 return EXIT_FAILURE;
2212 }
2213 goto END_ARG; /* Remaining args are ids */
2214 }
2215
2216 /* Others require only one message id, possibly followed by addresses,
2217 which will be handled as normal arguments. */
2218
2219 else
2220 {
2221 if (!mac_ismsgid(argv[msg_action_arg]))
2222 {
2223 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2224 argv[msg_action_arg], arg);
2225 return EXIT_FAILURE;
2226 }
2227 i++;
2228 }
2229 break;
2230
2231
2232 /* Some programs seem to call the -om option without the leading o;
2233 for sendmail it askes for "me too". Exim always does this. */
2234
2235 case 'm':
2236 if (*argrest != 0) badarg = TRUE;
2237 break;
2238
2239
2240 /* -N: don't do delivery - a debugging option that stops transports doing
2241 their thing. It implies debugging at the D_v level. */
2242
2243 case 'N':
2244 if (*argrest == 0)
2245 {
2246 dont_deliver = TRUE;
2247 debug_selector |= D_v;
2248 debug_file = stderr;
2249 }
2250 else badarg = TRUE;
2251 break;
2252
2253
2254 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2255 it. */
2256
2257 case 'n':
2258 break;
2259
2260 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2261 option to the specified value. This form uses long names. We need to handle
2262 -O option=value and -Ooption=value. */
2263
2264 case 'O':
2265 if (*argrest == 0)
2266 {
2267 if (++i >= argc)
2268 {
2269 fprintf(stderr, "exim: string expected after -O\n");
2270 exit(EXIT_FAILURE);
2271 }
2272 }
2273 break;
2274
2275 case 'o':
2276
2277 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2278 file" option). */
2279
2280 if (*argrest == 'A')
2281 {
2282 alias_arg = argrest + 1;
2283 if (alias_arg[0] == 0)
2284 {
2285 if (i+1 < argc) alias_arg = argv[++i]; else
2286 {
2287 fprintf(stderr, "exim: string expected after -oA\n");
2288 exit(EXIT_FAILURE);
2289 }
2290 }
2291 }
2292
2293 /* -oB: Set a connection message max value for remote deliveries */
2294
2295 else if (*argrest == 'B')
2296 {
2297 uschar *p = argrest + 1;
2298 if (p[0] == 0)
2299 {
2300 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2301 {
2302 connection_max_messages = 1;
2303 p = NULL;
2304 }
2305 }
2306
2307 if (p != NULL)
2308 {
2309 if (!isdigit(*p))
2310 {
2311 fprintf(stderr, "exim: number expected after -oB\n");
2312 exit(EXIT_FAILURE);
2313 }
2314 connection_max_messages = Uatoi(p);
2315 }
2316 }
2317
2318 /* -odb: background delivery */
2319
2320 else if (Ustrcmp(argrest, "db") == 0)
2321 {
2322 synchronous_delivery = FALSE;
2323 arg_queue_only = FALSE;
2324 queue_only_set = TRUE;
2325 }
2326
2327 /* -odf: foreground delivery (smail-compatible option); same effect as
2328 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2329 */
2330
2331 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2332 {
2333 synchronous_delivery = TRUE;
2334 arg_queue_only = FALSE;
2335 queue_only_set = TRUE;
2336 }
2337
2338 /* -odq: queue only */
2339
2340 else if (Ustrcmp(argrest, "dq") == 0)
2341 {
2342 synchronous_delivery = FALSE;
2343 arg_queue_only = TRUE;
2344 queue_only_set = TRUE;
2345 }
2346
2347 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2348 but no remote delivery */
2349
2350 else if (Ustrcmp(argrest, "dqs") == 0)
2351 {
2352 queue_smtp = TRUE;
2353 arg_queue_only = FALSE;
2354 queue_only_set = TRUE;
2355 }
2356
2357 /* -oex: Sendmail error flags. As these are also accepted without the
2358 leading -o prefix, for compatibility with vacation and other callers,
2359 they are handled with -e above. */
2360
2361 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2362 -oitrue: Another sendmail syntax for the same */
2363
2364 else if (Ustrcmp(argrest, "i") == 0 ||
2365 Ustrcmp(argrest, "itrue") == 0)
2366 dot_ends = FALSE;
2367
2368 /* -oM*: Set various characteristics for an incoming message; actually
2369 acted on for trusted callers only. */
2370
2371 else if (*argrest == 'M')
2372 {
2373 if (i+1 >= argc)
2374 {
2375 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2376 exit(EXIT_FAILURE);
2377 }
2378
2379 /* -oMa: Set sender host address */
2380
2381 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2382
2383 /* -oMaa: Set authenticator name */
2384
2385 else if (Ustrcmp(argrest, "Maa") == 0)
2386 sender_host_authenticated = argv[++i];
2387
2388 /* -oMas: setting authenticated sender */
2389
2390 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2391
2392 /* -oMai: setting authenticated id */
2393
2394 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2395
2396 /* -oMi: Set incoming interface address */
2397
2398 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2399
2400 /* -oMr: Received protocol */
2401
2402 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2403
2404 /* -oMs: Set sender host name */
2405
2406 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2407
2408 /* -oMt: Set sender ident */
2409
2410 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2411
2412 /* Else a bad argument */
2413
2414 else
2415 {
2416 badarg = TRUE;
2417 break;
2418 }
2419 }
2420
2421 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2422 seem to call this as -m (undocumented), so that is also accepted (see
2423 above). */
2424
2425 else if (Ustrcmp(argrest, "m") == 0) {}
2426
2427 /* -oo: An ancient flag for old-style addresses which still seems to
2428 crop up in some calls (see in SCO). */
2429
2430 else if (Ustrcmp(argrest, "o") == 0) {}
2431
2432 /* -oP <name>: set pid file path for daemon */
2433
2434 else if (Ustrcmp(argrest, "P") == 0)
2435 override_pid_file_path = argv[++i];
2436
2437 /* -or <n>: set timeout for non-SMTP acceptance
2438 -os <n>: set timeout for SMTP acceptance */
2439
2440 else if (*argrest == 'r' || *argrest == 's')
2441 {
2442 int *tp = (*argrest == 'r')?
2443 &arg_receive_timeout : &arg_smtp_receive_timeout;
2444 if (argrest[1] == 0)
2445 {
2446 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2447 }
2448 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2449 if (*tp < 0)
2450 {
2451 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2452 exit(EXIT_FAILURE);
2453 }
2454 }
2455
2456 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2457
2458 else if (Ustrcmp(argrest, "X") == 0)
2459 override_local_interfaces = argv[++i];
2460
2461 /* Unknown -o argument */
2462
2463 else badarg = TRUE;
2464 break;
2465
2466
2467 /* -ps: force Perl startup; -pd force delayed Perl startup */
2468
2469 case 'p':
2470 #ifdef EXIM_PERL
2471 if (*argrest == 's' && argrest[1] == 0)
2472 {
2473 perl_start_option = 1;
2474 break;
2475 }
2476 if (*argrest == 'd' && argrest[1] == 0)
2477 {
2478 perl_start_option = -1;
2479 break;
2480 }
2481 #endif
2482
2483 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2484 which sets the host protocol and host name */
2485
2486 if (*argrest == 0)
2487 {
2488 if (i+1 < argc) argrest = argv[++i]; else
2489 { badarg = TRUE; break; }
2490 }
2491
2492 if (*argrest != 0)
2493 {
2494 uschar *hn = Ustrchr(argrest, ':');
2495 if (hn == NULL)
2496 {
2497 received_protocol = argrest;
2498 }
2499 else
2500 {
2501 received_protocol = string_copyn(argrest, hn - argrest);
2502 sender_host_name = hn + 1;
2503 }
2504 }
2505 break;
2506
2507
2508 case 'q':
2509 receiving_message = FALSE;
2510
2511 /* -qq...: Do queue runs in a 2-stage manner */
2512
2513 if (*argrest == 'q')
2514 {
2515 queue_2stage = TRUE;
2516 argrest++;
2517 }
2518
2519 /* -qi...: Do only first (initial) deliveries */
2520
2521 if (*argrest == 'i')
2522 {
2523 queue_run_first_delivery = TRUE;
2524 argrest++;
2525 }
2526
2527 /* -qf...: Run the queue, forcing deliveries
2528 -qff..: Ditto, forcing thawing as well */
2529
2530 if (*argrest == 'f')
2531 {
2532 queue_run_force = TRUE;
2533 if (*(++argrest) == 'f')
2534 {
2535 deliver_force_thaw = TRUE;
2536 argrest++;
2537 }
2538 }
2539
2540 /* -q[f][f]l...: Run the queue only on local deliveries */
2541
2542 if (*argrest == 'l')
2543 {
2544 queue_run_local = TRUE;
2545 argrest++;
2546 }
2547
2548 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2549 optionally starting from a given message id. */
2550
2551 if (*argrest == 0 &&
2552 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2553 {
2554 queue_interval = 0;
2555 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2556 start_queue_run_id = argv[++i];
2557 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2558 stop_queue_run_id = argv[++i];
2559 }
2560
2561 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2562 optionally local only. */
2563
2564 else
2565 {
2566 if (*argrest != 0)
2567 queue_interval = readconf_readtime(argrest, 0, FALSE);
2568 else
2569 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2570 if (queue_interval <= 0)
2571 {
2572 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2573 exit(EXIT_FAILURE);
2574 }
2575 }
2576 break;
2577
2578
2579 case 'R': /* Synonymous with -qR... */
2580 receiving_message = FALSE;
2581
2582 /* -Rf: As -R (below) but force all deliveries,
2583 -Rff: Ditto, but also thaw all frozen messages,
2584 -Rr: String is regex
2585 -Rrf: Regex and force
2586 -Rrff: Regex and force and thaw
2587
2588 in all cases provided there are no further characters in this
2589 argument. */
2590
2591 if (*argrest != 0)
2592 {
2593 int i;
2594 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2595 {
2596 if (Ustrcmp(argrest, rsopts[i]) == 0)
2597 {
2598 if (i != 2) queue_run_force = TRUE;
2599 if (i >= 2) deliver_selectstring_regex = TRUE;
2600 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2601 argrest += Ustrlen(rsopts[i]);
2602 }
2603 }
2604 }
2605
2606 /* -R: Set string to match in addresses for forced queue run to
2607 pick out particular messages. */
2608
2609 if (*argrest == 0)
2610 {
2611 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2612 {
2613 fprintf(stderr, "exim: string expected after -R\n");
2614 exit(EXIT_FAILURE);
2615 }
2616 }
2617 else deliver_selectstring = argrest;
2618 if (queue_interval < 0) queue_interval = 0;
2619 break;
2620
2621
2622 /* -r: an obsolete synonym for -f (see above) */
2623
2624
2625 /* -S: Like -R but works on sender. */
2626
2627 case 'S': /* Synonymous with -qS... */
2628 receiving_message = FALSE;
2629
2630 /* -Sf: As -S (below) but force all deliveries,
2631 -Sff: Ditto, but also thaw all frozen messages,
2632 -Sr: String is regex
2633 -Srf: Regex and force
2634 -Srff: Regex and force and thaw
2635
2636 in all cases provided there are no further characters in this
2637 argument. */
2638
2639 if (*argrest != 0)
2640 {
2641 int i;
2642 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2643 {
2644 if (Ustrcmp(argrest, rsopts[i]) == 0)
2645 {
2646 if (i != 2) queue_run_force = TRUE;
2647 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2648 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2649 argrest += Ustrlen(rsopts[i]);
2650 }
2651 }
2652 }
2653
2654 /* -S: Set string to match in addresses for forced queue run to
2655 pick out particular messages. */
2656
2657 if (*argrest == 0)
2658 {
2659 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2660 {
2661 fprintf(stderr, "exim: string expected after -S\n");
2662 exit(EXIT_FAILURE);
2663 }
2664 }
2665 else deliver_selectstring_sender = argrest;
2666 if (queue_interval < 0) queue_interval = 0;
2667 break;
2668
2669 /* -Tqt is an option that is exclusively for use by the testing suite.
2670 It is not recognized in other circumstances. It allows for the setting up
2671 of explicit "queue times" so that various warning/retry things can be
2672 tested. Otherwise variability of clock ticks etc. cause problems. */
2673
2674 case 'T':
2675 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2676 fudged_queue_times = argv[++i];
2677 else badarg = TRUE;
2678 break;
2679
2680
2681 /* -t: Set flag to extract recipients from body of message. */
2682
2683 case 't':
2684 if (*argrest == 0) extract_recipients = TRUE;
2685
2686 /* -ti: Set flag to extract recipients from body of message, and also
2687 specify that dot does not end the message. */
2688
2689 else if (Ustrcmp(argrest, "i") == 0)
2690 {
2691 extract_recipients = TRUE;
2692 dot_ends = FALSE;
2693 }
2694
2695 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2696
2697 #ifdef SUPPORT_TLS
2698 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2699 #endif
2700
2701 else badarg = TRUE;
2702 break;
2703
2704
2705 /* -U: This means "initial user submission" in sendmail, apparently. The
2706 doc claims that in future sendmail may refuse syntactically invalid
2707 messages instead of fixing them. For the moment, we just ignore it. */
2708
2709 case 'U':
2710 break;
2711
2712
2713 /* -v: verify things - this is a very low-level debugging */
2714
2715 case 'v':
2716 if (*argrest == 0)
2717 {
2718 debug_selector |= D_v;
2719 debug_file = stderr;
2720 }
2721 else badarg = TRUE;
2722 break;
2723
2724
2725 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2726
2727 The -x flag tells the sendmail command that mail from a local
2728 mail program has National Language Support (NLS) extended characters
2729 in the body of the mail item. The sendmail command can send mail with
2730 extended NLS characters across networks that normally corrupts these
2731 8-bit characters.
2732
2733 As Exim is 8-bit clean, it just ignores this flag. */
2734
2735 case 'x':
2736 if (*argrest != 0) badarg = TRUE;
2737 break;
2738
2739 /* All other initial characters are errors */
2740
2741 default:
2742 badarg = TRUE;
2743 break;
2744 } /* End of high-level switch statement */
2745
2746 /* Failed to recognize the option, or syntax error */
2747
2748 if (badarg)
2749 {
2750 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2751 "option %s\n", arg);
2752 exit(EXIT_FAILURE);
2753 }
2754 }
2755
2756
2757/* Arguments have been processed. Check for incompatibilities. */
2758
2759END_ARG:
2760if ((
2761 (smtp_input || extract_recipients || recipients_arg < argc) &&
2762 (daemon_listen || queue_interval >= 0 || bi_option ||
2763 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2764 filter_test != NULL || (msg_action_arg > 0 && !one_msg_action))
2765 ) ||
2766 (
2767 msg_action_arg > 0 &&
2768 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2769 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2770 ) ||
2771 (
2772 (daemon_listen || queue_interval >= 0) &&
2773 (sender_address != NULL || list_options || list_queue || checking ||
2774 bi_option)
2775 ) ||
2776 (
2777 daemon_listen && queue_interval == 0
2778 ) ||
2779 (
2780 list_options &&
2781 (checking || smtp_input || extract_recipients ||
2782 filter_test != NULL || bi_option)
2783 ) ||
2784 (
2785 verify_address_mode &&
2786 (address_test_mode || smtp_input || extract_recipients ||
2787 filter_test != NULL || bi_option)
2788 ) ||
2789 (
2790 address_test_mode && (smtp_input || extract_recipients ||
2791 filter_test != NULL || bi_option)
2792 ) ||
2793 (
2794 smtp_input && (sender_address != NULL || filter_test != NULL ||
2795 extract_recipients)
2796 ) ||
2797 (
2798 deliver_selectstring != NULL && queue_interval < 0
2799 )
2800 )
2801 {
2802 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2803 exit(EXIT_FAILURE);
2804 }
2805
2806/* If debugging is set up, set the file and the file descriptor to pass on to
2807child processes. It should, of course, be 2 for stderr. Also, force the daemon
2808to run in the foreground. */
2809
2810if (debug_selector != 0)
2811 {
2812 debug_file = stderr;
2813 debug_fd = fileno(debug_file);
2814 background_daemon = FALSE;
2815 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2816 if (debug_selector != D_v) /* -v only doesn't show this */
2817 {
2818 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2819 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2820 debug_selector);
2821 show_whats_supported(stderr);
2822 }
2823 }
2824
2825/* When started with root privilege, ensure that the limits on the number of
2826open files and the number of processes (where that is accessible) are
2827sufficiently large, or are unset, in case Exim has been called from an
2828environment where the limits are screwed down. Not all OS have the ability to
2829change some of these limits. */
2830
2831if (unprivileged)
2832 {
2833 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2834 }
2835else
2836 {
2837 struct rlimit rlp;
2838
2839 #ifdef RLIMIT_NOFILE
2840 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2841 {
2842 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2843 strerror(errno));
2844 rlp.rlim_cur = rlp.rlim_max = 0;
2845 }
eb2c0248
PH
2846
2847 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
2848 be exceeded. It turns out that some older OS have a fixed upper limit of
2849 256. */
eb2c0248 2850
059ec3d9
PH
2851 if (rlp.rlim_cur < 1000)
2852 {
2853 rlp.rlim_cur = rlp.rlim_max = 1000;
2854 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 2855 {
a494b1e1
PH
2856 rlp.rlim_cur = rlp.rlim_max = 256;
2857 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2858 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2859 strerror(errno));
eb2c0248 2860 }
059ec3d9
PH
2861 }
2862 #endif
2863
2864 #ifdef RLIMIT_NPROC
2865 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2866 {
2867 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2868 strerror(errno));
2869 rlp.rlim_cur = rlp.rlim_max = 0;
2870 }
2871
2872 #ifdef RLIM_INFINITY
2873 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2874 {
2875 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2876 #else
2877 if (rlp.rlim_cur < 1000)
2878 {
2879 rlp.rlim_cur = rlp.rlim_max = 1000;
2880 #endif
2881 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2882 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2883 strerror(errno));
2884 }
2885 #endif
2886 }
2887
2888/* Exim is normally entered as root (but some special configurations are
2889possible that don't do this). However, it always spins off sub-processes that
2890set their uid and gid as required for local delivery. We don't want to pass on
2891any extra groups that root may belong to, so we want to get rid of them all at
2892this point.
2893
2894We need to obey setgroups() at this stage, before possibly giving up root
2895privilege for a changed configuration file, but later on we might need to
2896check on the additional groups for the admin user privilege - can't do that
2897till after reading the config, which might specify the exim gid. Therefore,
2898save the group list here first. */
2899
2900group_count = getgroups(NGROUPS_MAX, group_list);
2901
2902/* There is a fundamental difference in some BSD systems in the matter of
2903groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2904known not to be different. On the "different" systems there is a single group
2905list, and the first entry in it is the current group. On all other versions of
2906Unix there is a supplementary group list, which is in *addition* to the current
2907group. Consequently, to get rid of all extraneous groups on a "standard" system
2908you pass over 0 groups to setgroups(), while on a "different" system you pass
2909over a single group - the current group, which is always the first group in the
2910list. Calling setgroups() with zero groups on a "different" system results in
2911an error return. The following code should cope with both types of system.
2912
2913However, if this process isn't running as root, setgroups() can't be used
2914since you have to be root to run it, even if throwing away groups. Not being
2915root here happens only in some unusual configurations. We just ignore the
2916error. */
2917
2918if (setgroups(0, NULL) != 0)
2919 {
2920 if (setgroups(1, group_list) != 0 && !unprivileged)
2921 {
2922 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
2923 exit(EXIT_FAILURE);
2924 }
2925 }
2926
2927/* If the configuration file name has been altered by an argument on the
2928command line (either a new file name or a macro definition) and the caller is
2929not root or the exim user, or if this is a filter testing run, remove any
2930setuid privilege the program has, and run as the underlying user.
2931
2932If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
2933severely restricts the use of -C for some purposes.
2934
2935Otherwise, set the real ids to the effective values (should be root unless run
2936from inetd, which it can either be root or the exim uid, if one is configured).
2937
2938There is a private mechanism for bypassing some of this, in order to make it
2939possible to test lots of configurations automatically, without having either to
2940recompile each time, or to patch in an actual configuration file name and other
2941values (such as the path name). If running in the test harness, pretend that
2942configuration file changes and macro definitions haven't happened. */
2943
2944if (( /* EITHER */
2945 (config_changed || macros != NULL) && /* Config changed, and */
2946 real_uid != root_uid && /* Not root, and */
2947 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
2948 real_uid != exim_uid && /* Not exim, and */
2949 #endif
2950 !running_in_test_harness /* Not fudged */
2951 ) || /* OR */
2952 expansion_test /* expansion testing */
2953 || /* OR */
2954 filter_test != NULL) /* Filter testing */
2955 {
2956 setgroups(group_count, group_list);
2957 exim_setugid(real_uid, real_gid, FALSE,
2958 US"-C, -D, -be or -bf forces real uid");
2959 removed_privilege = TRUE;
2960
2961 /* In the normal case when Exim is called like this, stderr is available
2962 and should be used for any logging information because attempts to write
2963 to the log will usually fail. To arrange this, we unset really_exim. However,
2964 if no stderr is available there is no point - we might as well have a go
2965 at the log (if it fails, syslog will be written). */
2966
2967 if (log_stderr != NULL) really_exim = FALSE;
2968 }
2969
2970/* Privilege is to be retained for the moment. It may be dropped later,
2971depending on the job that this Exim process has been asked to do. For now, set
2972the real uid to the effective so that subsequent re-execs of Exim are done by a
2973privileged user. */
2974
2975else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
2976
2977/* If testing a filter, open the file now, before wasting time doing other
2978setups and reading the message. */
2979
2980if (filter_test != NULL)
2981 {
2982 filter_fd = Uopen(filter_test, O_RDONLY,0);
2983 if (filter_fd < 0)
2984 {
2985 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test,
2986 strerror(errno));
2987 return EXIT_FAILURE;
2988 }
2989 }
2990
2991/* Read the main runtime configuration data; this gives up if there
2992is a failure. It leaves the configuration file open so that the subsequent
2993configuration data for delivery can be read if needed. */
2994
2995readconf_main();
2996
2997/* Handle the decoding of logging options. */
2998
2999decode_bits(&log_write_selector, &log_extra_selector, log_selector_string,
3000 log_options, log_options_count, US"log");
3001
3002DEBUG(D_any)
3003 {
3004 debug_printf("configuration file is %s\n", config_main_filename);
3005 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3006 log_extra_selector);
3007 }
3008
3009/* If domain literals are not allowed, check the sender address that was
3010supplied with -f. Ditto for a stripped trailing dot. */
3011
3012if (sender_address != NULL)
3013 {
3014 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3015 {
3016 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3017 "allowed\n", sender_address);
3018 return EXIT_FAILURE;
3019 }
3020 if (f_end_dot && !strip_trailing_dot)
3021 {
3022 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3023 "(trailing dot not allowed)\n", sender_address);
3024 return EXIT_FAILURE;
3025 }
3026 }
3027
3028/* Paranoia check of maximum lengths of certain strings. There is a check
3029on the length of the log file path in log.c, which will come into effect
3030if there are any calls to write the log earlier than this. However, if we
3031get this far but the string is very long, it is better to stop now than to
3032carry on and (e.g.) receive a message and then have to collapse. The call to
3033log_write() from here will cause the ultimate panic collapse if the complete
3034file name exceeds the buffer length. */
3035
3036if (Ustrlen(log_file_path) > 200)
3037 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3038 "log_file_path is longer than 200 chars: aborting");
3039
3040if (Ustrlen(pid_file_path) > 200)
3041 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3042 "pid_file_path is longer than 200 chars: aborting");
3043
3044if (Ustrlen(spool_directory) > 200)
3045 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3046 "spool_directory is longer than 200 chars: aborting");
3047
3048/* Length check on the process name given to syslog for its TAG field,
3049which is only permitted to be 32 characters or less. See RFC 3164. */
3050
3051if (Ustrlen(syslog_processname) > 32)
3052 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3053 "syslog_processname is longer than 32 chars: aborting");
3054
3055/* In some operating systems, the environment variable TMPDIR controls where
3056temporary files are created; Exim doesn't use these (apart from when delivering
3057to MBX mailboxes), but called libraries such as DBM libraries may require them.
3058If TMPDIR is found in the environment, reset it to the value defined in the
3059TMPDIR macro, if this macro is defined. */
3060
3061#ifdef TMPDIR
3062 {
3063 uschar **p;
3064 for (p = USS environ; *p != NULL; p++)
3065 {
3066 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3067 Ustrcmp(*p+7, TMPDIR) != 0)
3068 {
3069 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3070 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3071 *p = newp;
3072 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3073 }
3074 }
3075 }
3076#endif
3077
3078/* Timezone handling. If timezone_string is "utc", set a flag to cause all
3079timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3080we may need to get rid of a bogus timezone setting. This can arise when Exim is
3081called by a user who has set the TZ variable. This then affects the timestamps
3082in log files and in Received: headers, and any created Date: header lines. The
3083required timezone is settable in the configuration file, so nothing can be done
3084about this earlier - but hopefully nothing will normally be logged earlier than
3085this. We have to make a new environment if TZ is wrong, but don't bother if
3086timestamps_utc is set, because then all times are in UTC anyway. */
3087
3088if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3089 {
3090 timestamps_utc = TRUE;
3091 }
3092else
3093 {
3094 uschar *envtz = US getenv("TZ");
3095 if ((envtz == NULL && timezone_string != NULL) ||
3096 (envtz != NULL &&
3097 (timezone_string == NULL ||
3098 Ustrcmp(timezone_string, envtz) != 0)))
3099 {
3100 uschar **p = USS environ;
3101 uschar **new;
3102 uschar **newp;
3103 int count = 0;
3104 while (*p++ != NULL) count++;
3105 if (envtz == NULL) count++;
3106 newp = new = malloc(sizeof(uschar *) * (count + 1));
3107 for (p = USS environ; *p != NULL; p++)
3108 {
3109 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3110 *newp++ = *p;
3111 }
3112 if (timezone_string != NULL)
3113 {
3114 *newp = malloc(Ustrlen(timezone_string) + 4);
3115 sprintf(CS *newp++, "TZ=%s", timezone_string);
3116 }
3117 *newp = NULL;
3118 environ = CSS new;
3119 tzset();
3120 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3121 tod_stamp(tod_log));
3122 }
3123 }
3124
3125/* Handle the case when we have removed the setuid privilege because of -C or
3126-D. This means that the caller of Exim was not root, and, provided that
3127ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3128the binary.
3129
3130If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3131were running as the exim user defined in the configuration file (different to
3132the one in the binary). The sysadmin may expect this case to retain privilege
3133because "the binary was called by the Exim user", but it hasn't, because of the
3134order in which it handles this stuff. There are two possibilities:
3135
3136 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3137 to do message deliveries. Thus, the fact that it is running as a
3138 non-privileged user is plausible, and might be wanted in some special
3139 configurations. However, really_exim will have been set false when
3140 privilege was dropped, to stop Exim trying to write to its normal log
3141 files. Therefore, re-enable normal log processing, assuming the sysadmin
3142 has set up the log directory correctly.
3143
3144 (2) If deliver_drop_privilege is not set, the configuration won't work as
3145 apparently intended, and so we log a panic message. In order to retain
3146 root for -C or -D, the caller must either be root or the Exim user
3147 defined in the binary (when deliver_drop_ privilege is false).
3148
3149If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3150built-in exim user or one defined in the configuration. In either event,
3151re-enable log processing, assuming the sysadmin knows what they are doing. */
3152
3153if (removed_privilege && (config_changed || macros != NULL) &&
3154 real_uid == exim_uid)
3155 {
3156 #ifdef ALT_CONFIG_ROOT_ONLY
3157 really_exim = TRUE; /* let logging work normally */
3158 #else
3159
3160 if (deliver_drop_privilege)
3161 really_exim = TRUE; /* let logging work normally */
3162 else
3163 log_write(0, LOG_MAIN|LOG_PANIC,
3164 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3165 (int)exim_uid, config_changed? "-C" : "-D");
3166 #endif
3167 }
3168
3169/* Start up Perl interpreter if Perl support is configured and there is a
3170perl_startup option, and the configuration or the command line specifies
3171initializing starting. Note that the global variables are actually called
3172opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3173
3174#ifdef EXIM_PERL
3175if (perl_start_option != 0)
3176 opt_perl_at_start = (perl_start_option > 0);
3177if (opt_perl_at_start && opt_perl_startup != NULL)
3178 {
3179 uschar *errstr;
3180 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3181 errstr = init_perl(opt_perl_startup);
3182 if (errstr != NULL)
3183 {
3184 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3185 return EXIT_FAILURE;
3186 }
3187 opt_perl_started = TRUE;
3188 }
3189#endif /* EXIM_PERL */
3190
3191/* Log the arguments of the call if the configuration file said so. This is
3192a debugging feature for finding out what arguments certain MUAs actually use.
3193Don't attempt it if logging is disabled, or if listing variables or if
3194verifying/testing addresses or expansions. */
3195
3196if ((log_extra_selector & LX_arguments) != 0 && really_exim
3197 && !list_options && !checking)
3198 {
3199 int i;
3200 uschar *p = big_buffer;
3201 Ustrcpy(p, "cwd=");
3202 (void)getcwd(CS p+4, big_buffer_size - 4);
3203 while (*p) p++;
3204 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3205 while (*p) p++;
3206 for (i = 0; i < argc; i++)
3207 {
3208 int len = Ustrlen(argv[i]);
3209 uschar *printing;
3210 uschar *quote;
3211 if (p + len + 8 >= big_buffer + big_buffer_size)
3212 {
3213 Ustrcpy(p, " ...");
3214 log_write(0, LOG_MAIN, "%s", big_buffer);
3215 Ustrcpy(big_buffer, "...");
3216 p = big_buffer + 3;
3217 }
3218 printing = string_printing(argv[i]);
3219 if (printing[0] == 0) quote = US"\""; else
3220 {
3221 uschar *pp = printing;
3222 quote = US"";
3223 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3224 }
3225 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3226 (p - big_buffer) - 4), printing, quote);
3227 while (*p) p++;
3228 }
3229 log_write(0, LOG_MAIN, "%s", big_buffer);
3230 }
3231
3232/* Set the working directory to be the top-level spool directory. We don't rely
3233on this in the code, which always uses fully qualified names, but it's useful
3234for core dumps etc. Don't complain if it fails - the spool directory might not
3235be generally accessible and calls with the -C option (and others) have lost
3236privilege by now. */
3237
3238if (Uchdir(spool_directory) != 0)
3239 {
3240 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, TRUE);
3241 (void)Uchdir(spool_directory);
3242 }
3243
3244/* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3245alias file. Exim doesn't have such a concept, but this call is screwed into
3246Sun's YP makefiles. Handle this by calling a configured script, as the real
3247user who called Exim. The -oA option can be used to pass an argument to the
3248script. */
3249
3250if (bi_option)
3251 {
3252 fclose(config_file);
3253 if (bi_command != NULL)
3254 {
3255 int i = 0;
3256 uschar *argv[3];
3257 argv[i++] = bi_command;
3258 if (alias_arg != NULL) argv[i++] = alias_arg;
3259 argv[i++] = NULL;
3260
3261 setgroups(group_count, group_list);
3262 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3263
3264 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3265 (argv[1] == NULL)? US"" : argv[1]);
3266
3267 execv(CS argv[0], (char *const *)argv);
3268 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3269 exit(EXIT_FAILURE);
3270 }
3271 else
3272 {
3273 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3274 exit(EXIT_SUCCESS);
3275 }
3276 }
3277
3278/* If an action on specific messages is requested, or if a daemon or queue
3279runner is being started, we need to know if Exim was called by an admin user.
3280This is the case if the real user is root or exim, or if the real group is
3281exim, or if one of the supplementary groups is exim or a group listed in
3282admin_groups. We don't fail all message actions immediately if not admin_user,
3283since some actions can be performed by non-admin users. Instead, set admin_user
3284for later interrogation. */
3285
3286if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3287 admin_user = TRUE;
3288else
3289 {
3290 int i, j;
3291
3292 for (i = 0; i < group_count; i++)
3293 {
3294 if (group_list[i] == exim_gid) admin_user = TRUE;
3295 else if (admin_groups != NULL)
3296 {
3297 for (j = 1; j <= (int)(admin_groups[0]); j++)
3298 if (admin_groups[j] == group_list[i])
3299 { admin_user = TRUE; break; }
3300 }
3301 if (admin_user) break;
3302 }
3303 }
3304
3305/* Another group of privileged users are the trusted users. These are root,
3306exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3307are permitted to specify sender_addresses with -f on the command line, and
3308other message parameters as well. */
3309
3310if (real_uid == root_uid || real_uid == exim_uid)
3311 trusted_caller = TRUE;
3312else
3313 {
3314 int i, j;
3315
3316 if (trusted_users != NULL)
3317 {
3318 for (i = 1; i <= (int)(trusted_users[0]); i++)
3319 if (trusted_users[i] == real_uid)
3320 { trusted_caller = TRUE; break; }
3321 }
3322
3323 if (!trusted_caller && trusted_groups != NULL)
3324 {
3325 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3326 {
3327 if (trusted_groups[i] == real_gid)
3328 trusted_caller = TRUE;
3329 else for (j = 0; j < group_count; j++)
3330 {
3331 if (trusted_groups[i] == group_list[j])
3332 { trusted_caller = TRUE; break; }
3333 }
3334 if (trusted_caller) break;
3335 }
3336 }
3337 }
3338
3339if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3340if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3341
3342/* Only an admin user may start the daemon or force a queue run in the default
3343configuration, but the queue run restriction can be relaxed. Only an admin
3344user may request that a message be returned to its sender forthwith. Only an
3345admin user may specify a debug level greater than D_v (because it might show
3346passwords, etc. in lookup queries). Only an admin user may request a queue
3347count. */
3348
3349if (!admin_user)
3350 {
3351 BOOL debugset = (debug_selector & ~D_v) != 0;
3352 if (deliver_give_up || daemon_listen ||
3353 (count_queue && queue_list_requires_admin) ||
3354 (list_queue && queue_list_requires_admin) ||
3355 (queue_interval >= 0 && prod_requires_admin) ||
3356 (debugset && !running_in_test_harness))
3357 {
3358 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3359 exit(EXIT_FAILURE);
3360 }
3361 }
3362
3363/* If the real user is not root or the exim uid, the argument for passing
3364in an open TCP/IP connection for another message is not permitted, nor is
3365running with the -N option for any delivery action, unless this call to exim is
3366one that supplied an input message, or we are using a patched exim for
3367regression testing. */
3368
3369if (real_uid != root_uid && real_uid != exim_uid &&
3370 (continue_hostname != NULL ||
3371 (dont_deliver &&
3372 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3373 )) && !running_in_test_harness)
3374 {
3375 fprintf(stderr, "exim: Permission denied\n");
3376 return EXIT_FAILURE;
3377 }
3378
3379/* If the caller is not trusted, certain arguments are ignored when running for
3380real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf). Note
3381that authority for performing certain actions on messages is tested in the
3382queue_action() function. */
3383
3384if (!trusted_caller && !checking && filter_test == NULL)
3385 {
3386 sender_host_name = sender_host_address = interface_address =
3387 sender_ident = received_protocol = NULL;
3388 sender_host_port = interface_port = 0;
3389 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3390 }
3391
3392/* If a sender host address is set, extract the optional port number off the
3393end of it and check its syntax. Do the same thing for the interface address.
3394Exim exits if the syntax is bad. */
3395
3396else
3397 {
3398 if (sender_host_address != NULL)
3399 sender_host_port = check_port(sender_host_address);
3400 if (interface_address != NULL)
3401 interface_port = check_port(interface_address);
3402 }
3403
3404/* If an SMTP message is being received check to see if the standard input is a
3405TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3406caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3407barf. */
3408
3409if (smtp_input)
3410 {
3411 union sockaddr_46 inetd_sock;
3412 SOCKLEN_T size = sizeof(inetd_sock);
3413 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3414 {
3415 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3416 if (family == AF_INET || family == AF_INET6)
3417 {
3418 union sockaddr_46 interface_sock;
3419 size = sizeof(interface_sock);
3420
3421 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3422 interface_address = host_ntoa(-1, &interface_sock, NULL,
3423 &interface_port);
3424
3425 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3426
3427 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3428 {
3429 is_inetd = TRUE;
3430 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3431 NULL, &sender_host_port);
3432 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3433 "inetd is not supported when mua_wrapper is set");
3434 }
3435 else
3436 {
3437 fprintf(stderr,
3438 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3439 return EXIT_FAILURE;
3440 }
3441 }
3442 }
3443 }
3444
3445/* If the load average is going to be needed while receiving a message, get it
3446now for those OS that require the first call to os_getloadavg() to be done as
3447root. There will be further calls later for each message received. */
3448
3449#ifdef LOAD_AVG_NEEDS_ROOT
3450if (receiving_message &&
3451 (queue_only_load >= 0 ||
3452 (is_inetd && smtp_load_reserve >= 0)
3453 ))
3454 {
3455 load_average = os_getloadavg();
3456 }
3457#endif
3458
3459/* The queue_only configuration option can be overridden by -odx on the command
3460line, except that if queue_only_override is false, queue_only cannot be unset
3461from the command line. */
3462
3463if (queue_only_set && (queue_only_override || arg_queue_only))
3464 queue_only = arg_queue_only;
3465
3466/* The receive_timeout and smtp_receive_timeout options can be overridden by
3467-or and -os. */
3468
3469if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3470if (arg_smtp_receive_timeout >= 0)
3471 smtp_receive_timeout = arg_smtp_receive_timeout;
3472
3473/* If Exim was started with root privilege, unless we have already removed the
3474root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3475except when starting the daemon or doing some kind of delivery or address
3476testing (-bt). These are the only cases when root need to be retained. We run
3477as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3478retained only for starting the daemon. */
3479
3480if (!unprivileged && /* originally had root AND */
3481 !removed_privilege && /* still got root AND */
3482 !daemon_listen && /* not starting the daemon */
3483 queue_interval <= 0 && /* (either kind of daemon) */
3484 ( /* AND EITHER */
3485 deliver_drop_privilege || /* requested unprivileged */
3486 ( /* OR */
3487 queue_interval < 0 && /* not running the queue */
3488 (msg_action_arg < 0 || /* and */
3489 msg_action != MSG_DELIVER) && /* not delivering and */
3490 (!checking || !address_test_mode) /* not address checking */
3491 )
3492 ))
3493 {
3494 exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed");
3495 }
3496
3497/* When we are retaining a privileged uid, we still change to the exim gid. */
3498
3499else setgid(exim_gid);
3500
3501/* Handle a request to list the delivery queue */
3502
3503if (list_queue)
3504 {
3505 set_process_info("listing the queue");
3506 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3507 exit(EXIT_SUCCESS);
3508 }
3509
3510/* Handle a request to count the delivery queue */
3511
3512if (count_queue)
3513 {
3514 set_process_info("counting the queue");
3515 queue_count();
3516 exit(EXIT_SUCCESS);
3517 }
3518
3519/* Handle actions on specific messages, except for the force delivery action,
3520which is done below. Some actions take a whole list of message ids, which
3521are known to continue up to the end of the arguments. Others take a single
3522message id and then operate on the recipients list. */
3523
3524if (msg_action_arg > 0 && msg_action != MSG_DELIVER)
3525 {
3526 int yield = EXIT_SUCCESS;
3527 set_process_info("acting on specified messages");
3528
3529 if (!one_msg_action)
3530 {
3531 for (i = msg_action_arg; i < argc; i++)
3532 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3533 yield = EXIT_FAILURE;
3534 }
3535
3536 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3537 recipients_arg)) yield = EXIT_FAILURE;
3538 exit(yield);
3539 }
3540
3541/* All the modes below here require the remaining configuration sections
3542to be read, except that we can skip over the ACL setting when delivering
3543specific messages, or doing a queue run. (For various testing cases we could
3544skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3545for skipping. */
3546
3547readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3548
3549/* The configuration data will have been read into POOL_PERM because we won't
3550ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3551this is just a bit of pedantic tidiness. It wouldn't really matter if the
3552configuration were read into POOL_MAIN, because we don't do any resets till
3553later on. However, it seems right, and it does ensure that both pools get used.
3554*/
3555
3556store_pool = POOL_MAIN;
3557
3558/* Handle the -brt option. This is for checking out retry configurations.
3559The next three arguments are a domain name or a complete address, and
3560optionally two error numbers. All it does is to call the function that
3561scans the retry configuration data. */
3562
3563if (test_retry_arg >= 0)
3564 {
3565 retry_config *yield;
3566 int basic_errno = 0;
3567 int more_errno = 0;
3568 uschar *s1, *s2;
3569
3570 if (test_retry_arg >= argc)
3571 {
3572 printf("-brt needs a domain or address argument\n");
3573 exim_exit(EXIT_FAILURE);
3574 }
3575 s1 = argv[test_retry_arg++];
3576 s2 = NULL;
3577
3578 /* If the first argument contains no @ and no . it might be a local user
3579 or it might be a single-component name. Treat as a domain. */
3580
3581 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3582 {
3583 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3584 "being \ntreated as a one-component domain, not as a local part.\n\n",
3585 s1);
3586 }
3587
3588 /* There may be an optional second domain arg. */
3589
3590 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3591 s2 = argv[test_retry_arg++];
3592
3593 /* The final arg is an error name */
3594
3595 if (test_retry_arg < argc)
3596 {
3597 uschar *ss = argv[test_retry_arg];
3598 uschar *error =
3599 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3600 if (error != NULL)
3601 {
3602 printf("%s\n", CS error);
3603 return EXIT_FAILURE;
3604 }
3605
3606 /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as
3607 an error is for matching codes to the decade. Turn them into a real error
3608 code, off the decade. */
3609
3610 if (basic_errno == ERRNO_RCPT4XX)
3611 {
3612 int code = (more_errno >> 8) & 255;
3613 if (code == 255)
3614 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3615 else if (code > 100)
3616 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3617 }
3618 }
3619
3620 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3621 if (yield == NULL) printf("No retry information found\n"); else
3622 {
3623 retry_rule *r;
3624 more_errno = yield->more_errno;
3625 printf("Retry rule: %s ", yield->pattern);
3626
3627 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3628 {
3629 printf("quota%s%s ",
3630 (more_errno > 0)? "_" : "",
3631 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3632 }
3633 else if (yield->basic_errno == ECONNREFUSED)
3634 {
3635 printf("refused%s%s ",
3636 (more_errno > 0)? "_" : "",
3637 (more_errno == 'M')? "MX" :
3638 (more_errno == 'A')? "A" : "");
3639 }
3640 else if (yield->basic_errno == ETIMEDOUT)
3641 {
3642 printf("timeout");
3643 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3644 more_errno &= 255;
3645 if (more_errno != 0) printf("_%s",
3646 (more_errno == 'M')? "MX" : "A");
3647 printf(" ");
3648 }
3649 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3650 printf("auth_failed ");
3651 else printf("* ");
3652
3653 for (r = yield->rules; r != NULL; r = r->next)
3654 {
3655 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3656 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3657 if (r->rule == 'G')
3658 {
3659 int x = r->p2;
3660 int f = x % 1000;
3661 int d = 100;
3662 printf(",%d.", x/1000);
3663 do
3664 {
3665 printf("%d", f/d);
3666 f %= d;
3667 d /= 10;
3668 }
3669 while (f != 0);
3670 }
3671 printf("; ");
3672 }
3673
3674 printf("\n");
3675 }
3676 exim_exit(EXIT_SUCCESS);
3677 }
3678
3679/* Handle a request to list one or more configuration options */
3680
3681if (list_options)
3682 {
3683 set_process_info("listing variables");
3684 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3685 else for (i = recipients_arg; i < argc; i++)
3686 {
3687 if (i < argc - 1 &&
3688 (Ustrcmp(argv[i], "router") == 0 ||
3689 Ustrcmp(argv[i], "transport") == 0 ||
3690 Ustrcmp(argv[i], "authenticator") == 0))
3691 {
3692 readconf_print(argv[i+1], argv[i]);
3693 i++;
3694 }
3695 else readconf_print(argv[i], NULL);
3696 }
3697 exim_exit(EXIT_SUCCESS);
3698 }
3699
3700
3701/* Handle a request to deliver one or more messages that are already on the
3702queue. Values of msg_action other than MSG_DELIVER are dealt with above. This
3703is typically used for a small number when prodding by hand (when the option
3704forced_delivery will be set) or when re-execing to regain root privilege.
3705Each message delivery must happen in a separate process, so we fork a process
3706for each one, and run them sequentially so that debugging output doesn't get
3707intertwined, and to avoid spawning too many processes if a long list is given.
3708However, don't fork for the last one; this saves a process in the common case
3709when Exim is called to deliver just one message. */
3710
3711if (msg_action_arg > 0)
3712 {
3713 if (prod_requires_admin && !admin_user)
3714 {
3715 fprintf(stderr, "exim: Permission denied\n");
3716 exim_exit(EXIT_FAILURE);
3717 }
3718 set_process_info("delivering specified messages");
3719 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3720 for (i = msg_action_arg; i < argc; i++)
3721 {
3722 int status;
3723 pid_t pid;
3724 if (i == argc - 1)
3725 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3726 else if ((pid = fork()) == 0)
3727 {
3728 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3729 _exit(EXIT_SUCCESS);
3730 }
3731 else if (pid < 0)
3732 {
3733 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3734 strerror(errno));
3735 exim_exit(EXIT_FAILURE);
3736 }
3737 else wait(&status);
3738 }
3739 exim_exit(EXIT_SUCCESS);
3740 }
3741
3742
3743/* If only a single queue run is requested, without SMTP listening, we can just
3744turn into a queue runner, with an optional starting message id. */
3745
3746if (queue_interval == 0 && !daemon_listen)
3747 {
3748 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3749 (start_queue_run_id == NULL)? US"" : US" starting at ",
3750 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3751 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3752 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3753 set_process_info("running the queue (single queue run)");
3754 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3755 exim_exit(EXIT_SUCCESS);
3756 }
3757
3758
3759/* Find the login name of the real user running this process. This is always
3760needed when receiving a message, because it is written into the spool file. It
3761may also be used to construct a from: or a sender: header, and in this case we
3762need the user's full name as well, so save a copy of it, checked for RFC822
3763syntax and munged if necessary, if it hasn't previously been set by the -F
3764argument. We may try to get the passwd entry more than once, in case NIS or
3765other delays are in evidence. Save the home directory for use in filter testing
3766(only). */
3767
3768for (i = 0;;)
3769 {
3770 if ((pw = getpwuid(real_uid)) != NULL)
3771 {
3772 originator_login = string_copy(US pw->pw_name);
3773 originator_home = string_copy(US pw->pw_dir);
3774
3775 /* If user name has not been set by -F, set it from the passwd entry
3776 unless -f has been used to set the sender address by a trusted user. */
3777
3778 if (originator_name == NULL)
3779 {
3780 if (sender_address == NULL ||
3781 (!trusted_caller && filter_test == NULL))
3782 {
3783 uschar *name = US pw->pw_gecos;
3784 uschar *amp = Ustrchr(name, '&');
3785 uschar buffer[256];
3786
3787 /* Most Unix specify that a '&' character in the gecos field is
3788 replaced by a copy of the login name, and some even specify that
3789 the first character should be upper cased, so that's what we do. */
3790
3791 if (amp != NULL)
3792 {
3793 int loffset;
3794 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3795 amp - name, name, &loffset, originator_login, amp + 1);
3796 buffer[loffset] = toupper(buffer[loffset]);
3797 name = buffer;
3798 }
3799
3800 /* If a pattern for matching the gecos field was supplied, apply
3801 it and then expand the name string. */
3802
3803 if (gecos_pattern != NULL && gecos_name != NULL)
3804 {
3805 const pcre *re;
3806 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
3807
3808 if (regex_match_and_setup(re, name, 0, -1))
3809 {
3810 uschar *new_name = expand_string(gecos_name);
3811 expand_nmax = -1;
3812 if (new_name != NULL)
3813 {
3814 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
3815 "gecos field \"%s\"\n", new_name, name);
3816 name = new_name;
3817 }
3818 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
3819 "\"%s\": %s\n", gecos_name, expand_string_message);
3820 }
3821 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
3822 "gecos field \"%s\"\n", gecos_pattern, name);
3823 store_free((void *)re);
3824 }
3825 originator_name = string_copy(name);
3826 }
3827
3828 /* A trusted caller has used -f but not -F */
3829
3830 else originator_name = US"";
3831 }
3832
3833 /* Break the retry loop */
3834
3835 break;
3836 }
3837
3838 if (++i > finduser_retries) break;
3839 sleep(1);
3840 }
3841
3842/* If we cannot get a user login, log the incident and give up, unless the
3843configuration specifies something to use. When running in the test harness,
3844any setting of unknown_login overrides the actual login name. */
3845
3846if (originator_login == NULL || running_in_test_harness)
3847 {
3848 if (unknown_login != NULL)
3849 {
3850 originator_login = expand_string(unknown_login);
3851 if (originator_name == NULL && unknown_username != NULL)
3852 originator_name = expand_string(unknown_username);
3853 if (originator_name == NULL) originator_name = US"";
3854 }
3855 if (originator_login == NULL)
3856 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
3857 (int)real_uid);
3858 }
3859
3860/* Ensure that the user name is in a suitable form for use as a "phrase" in an
3861RFC822 address.*/
3862
3863originator_name = string_copy(parse_fix_phrase(originator_name,
3864 Ustrlen(originator_name), big_buffer, big_buffer_size));
3865
3866/* If a message is created by this call of Exim, the uid/gid of its originator
3867are those of the caller. These values are overridden if an existing message is
3868read in from the spool. */
3869
3870originator_uid = real_uid;
3871originator_gid = real_gid;
3872
3873DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
3874 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
3875
3876/* Run in daemon and/or queue-running mode. The function daemon_go() never
3877returns. We leave this till here so that the originator_ fields are available
3878for incoming messages via the daemon. */
3879
3880if (daemon_listen || queue_interval > 0)
3881 {
3882 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be "
3883 "run when mua_wrapper is set");
3884 daemon_go();
3885 }
3886
3887/* If the sender ident has not been set (by a trusted caller) set it to
3888the caller. This will get overwritten below for an inetd call. If a trusted
3889caller has set it empty, unset it. */
3890
3891if (sender_ident == NULL) sender_ident = originator_login;
3892 else if (sender_ident[0] == 0) sender_ident = NULL;
3893
3894/* Handle the -brw option, which is for checking out rewriting rules. Cause log
3895writes (on errors) to go to stderr instead. Can't do this earlier, as want the
3896originator_* variables set. */
3897
3898if (test_rewrite_arg >= 0)
3899 {
3900 really_exim = FALSE;
3901 if (test_rewrite_arg >= argc)
3902 {
3903 printf("-brw needs an address argument\n");
3904 exim_exit(EXIT_FAILURE);
3905 }
3906 rewrite_test(argv[test_rewrite_arg]);
3907 exim_exit(EXIT_SUCCESS);
3908 }
3909
3910/* A locally-supplied message is considered to be coming from a local user
3911unless a trusted caller supplies a sender address with -f, or is passing in the
3912message via SMTP (inetd invocation or otherwise). */
3913
3914if ((sender_address == NULL && !smtp_input) ||
3915 (!trusted_caller && filter_test == NULL))
3916 {
3917 sender_local = TRUE;
3918
3919 /* A trusted caller can supply authenticated_sender and authenticated_id
3920 via -oMas and -oMai and if so, they will already be set. */
3921
3922 if (authenticated_sender == NULL)
3923 authenticated_sender = string_sprintf("%s@%s", originator_login,
3924 qualify_domain_sender);
3925 if (authenticated_id == NULL) authenticated_id = originator_login;
3926 }
3927
3928/* Trusted callers are always permitted to specify the sender address.
3929Untrusted callers may specify it if it matches untrusted_set_sender, or if what
3930is specified is the empty address. However, if a trusted caller does not
3931specify a sender address for SMTP input, we leave sender_address unset. This
3932causes the MAIL commands to be honoured. */
3933
3934if ((!smtp_input && sender_address == NULL) ||
3935 !receive_check_set_sender(sender_address))
3936 {
3937 /* Either the caller is not permitted to set a general sender, or this is
3938 non-SMTP input and the trusted caller has not set a sender. If there is no
3939 sender, or if a sender other than <> is set, override with the originator's
3940 login (which will get qualified below), except when checking things. */
3941
3942 if (sender_address == NULL /* No sender_address set */
3943 || /* OR */
3944 (sender_address[0] != 0 && /* Non-empty sender address, AND */
3945 !checking && /* Not running tests, AND */
3946 filter_test == NULL)) /* Not testing a filter */
3947 {
3948 sender_address = originator_login;
3949 sender_address_forced = FALSE;
3950 sender_address_domain = 0;
3951 }
3952 }
3953
3954/* Remember whether an untrusted caller set the sender address */
3955
3956sender_set_untrusted = sender_address != originator_login && !trusted_caller;
3957
3958/* Ensure that the sender address is fully qualified unless it is the empty
3959address, which indicates an error message, or doesn't exist (root caller, smtp
3960interface, no -f argument). */
3961
3962if (sender_address != NULL && sender_address[0] != 0 &&
3963 sender_address_domain == 0)
3964 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
3965 qualify_domain_sender);
3966
3967DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
3968
3969/* Handle a request to verify a list of addresses, or test them for delivery.
3970This must follow the setting of the sender address, since routers can be
3971predicated upon the sender. If no arguments are given, read addresses from
3972stdin. Set debug_level to at least D_v to get full output for address testing.
3973*/
3974
3975if (verify_address_mode || address_test_mode)
3976 {
3977 int exit_value = 0;
3978 int flags = vopt_qualify;
3979
3980 if (verify_address_mode)
3981 {
3982 if (!verify_as_sender) flags |= vopt_is_recipient;
3983 DEBUG(D_verify) debug_print_ids(US"Verifying:");
3984 }
3985
3986 else
3987 {
3988 flags |= vopt_is_recipient;
3989 debug_selector |= D_v;
3990 debug_file = stderr;
3991 debug_fd = fileno(debug_file);
3992 DEBUG(D_verify) debug_print_ids(US"Address testing:");
3993 }
3994
3995 if (recipients_arg < argc)
3996 {
3997 while (recipients_arg < argc)
3998 {
3999 uschar *s = argv[recipients_arg++];
4000 while (*s != 0)
4001 {
4002 BOOL finished = FALSE;
4003 uschar *ss = parse_find_address_end(s, FALSE);
4004 if (*ss == ',') *ss = 0; else finished = TRUE;
4005 test_address(s, flags, &exit_value);
4006 s = ss;
4007 if (!finished)
4008 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4009 }
4010 }
4011 }
4012
4013 else for (;;)
4014 {
4015 uschar *s = get_stdinput(NULL, NULL);
4016 if (s == NULL) break;
4017 test_address(s, flags, &exit_value);
4018 }
4019
4020 route_tidyup();
4021 exim_exit(exit_value);
4022 }
4023
4024/* Handle expansion checking */
4025
4026if (expansion_test)
4027 {
4028 if (recipients_arg < argc)
4029 {
4030 while (recipients_arg < argc)
4031 {
4032 uschar *s = argv[recipients_arg++];
4033 uschar *ss = expand_string(s);
4034 if (ss == NULL)
4035 printf ("Failed: %s\n", expand_string_message);
4036 else printf("%s\n", CS ss);
4037 }
4038 }
4039
4040 /* Read stdin */
4041
4042 else
4043 {
4044 char *(*fn_readline)(char *) = NULL;
4045 char *(*fn_addhist)(char *) = NULL;
4046
4047 #ifdef USE_READLINE
4048 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4049 #endif
4050
4051 for (;;)
4052 {
4053 uschar *ss;
4054 uschar *source = get_stdinput(fn_readline, fn_addhist);
4055 if (source == NULL) break;
4056 ss = expand_string(source);
4057 if (ss == NULL)
4058 printf ("Failed: %s\n", expand_string_message);
4059 else printf("%s\n", CS ss);
4060 }
4061
4062 #ifdef USE_READLINE
4063 if (dlhandle != NULL) dlclose(dlhandle);
4064 #endif
4065 }
4066
4067 exim_exit(EXIT_SUCCESS);
4068 }
4069
4070
4071/* The active host name is normally the primary host name, but it can be varied
4072for hosts that want to play several parts at once. We need to ensure that it is
4073set for host checking, and for receiving messages. */
4074
4075smtp_active_hostname = primary_hostname;
4076if (raw_active_hostname != NULL)
4077 {
4078 uschar *nah = expand_string(raw_active_hostname);
4079 if (nah == NULL)
4080 {
4081 if (!expand_string_forcedfail)
4082 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4083 "(smtp_active_hostname): %s", raw_active_hostname,
4084 expand_string_message);
4085 }
4086 else if (nah[0] != 0) smtp_active_hostname = nah;
4087 }
4088
4089/* Handle host checking: this facility mocks up an incoming SMTP call from a
4090given IP address so that the blocking and relay configuration can be tested. An
4091RFC 1413 call is made only if we are running in the test harness and an
4092incoming interface and both ports are specified, because there is no TCP/IP
4093call to find the ident for. */
4094
4095if (host_checking)
4096 {
4097 sender_ident = NULL;
4098 if (running_in_test_harness && sender_host_port != 0 &&
4099 interface_address != NULL && interface_port != 0)
4100 verify_get_ident(1413);
4101
4102 host_build_sender_fullhost();
4103 smtp_input = TRUE;
4104 smtp_in = stdin;
4105 smtp_out = stdout;
4106 sender_local = FALSE;
4107 sender_host_notsocket = TRUE;
4108 debug_file = stderr;
4109 debug_fd = fileno(debug_file);
4110 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4111 "**** but without any ident (RFC 1413) callback.\n"
4112 "**** This is not for real!\n\n",
4113 sender_host_address);
4114
4115 if (verify_check_host(&hosts_connection_nolog) == OK)
4116 log_write_selector &= ~L_smtp_connection;
4117 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4118
4119 if (smtp_start_session())
4120 {
4121 reset_point = store_get(0);
4122 for (;;)
4123 {
4124 store_reset(reset_point);
4125 if (smtp_setup_msg() <= 0) break;
4126 if (!receive_msg(FALSE)) break;
4127 }
4128 }
4129 exim_exit(EXIT_SUCCESS);
4130 }
4131
4132
4133/* Arrange for message reception if recipients or SMTP were specified;
4134otherwise complain unless a version print (-bV) happened or this is a filter
4135verification test. In the former case, show the configuration file name. */
4136
4137if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4138 {
4139 if (version_printed)
4140 {
4141 printf("Configuration file is %s\n", config_main_filename);
4142 return EXIT_SUCCESS;
4143 }
4144 if (filter_test == NULL)
4145 {
4146 fprintf(stderr,
4147"Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4148"not directly from a shell command line. Options and/or arguments control\n"
4149"what it does when called. For a list of options, see the Exim documentation.\n");
4150 return EXIT_FAILURE;
4151 }
4152 }
4153
4154
4155/* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4156standard input into an MUA that submits to a smarthost over TCP/IP. We know
4157that we are not called from inetd, because that is rejected above. The
4158following configuration settings are forced here:
4159
4160 (1) Synchronous delivery (-odi)
4161 (2) Errors to stderr (-oep == -oeq)
4162 (3) No parallel remote delivery
4163 (4) Unprivileged delivery
4164
4165We don't force overall queueing options because there are several of them;
4166instead, queueing is avoided below when mua_wrapper is set. However, we do need
4167to override any SMTP queueing. */
4168
4169if (mua_wrapper)
4170 {
4171 synchronous_delivery = TRUE;
4172 arg_error_handling = ERRORS_STDERR;
4173 remote_max_parallel = 1;
4174 deliver_drop_privilege = TRUE;
4175 queue_smtp = FALSE;
4176 queue_smtp_domains = NULL;
4177 }
4178
4179
4180/* Prepare to accept one or more new messages on the standard input. When a
4181message has been read, its id is returned in message_id[]. If doing immediate
4182delivery, we fork a delivery process for each received message, except for the
4183last one, where we can save a process switch.
4184
4185It is only in non-smtp mode that error_handling is allowed to be changed from
4186its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4187sendmail error modes other than -oem ever actually used? Later: yes.) */
4188
4189if (!smtp_input) error_handling = arg_error_handling;
4190
4191/* If this is an inetd call, ensure that stderr is closed to prevent panic
4192logging being sent down the socket and make an identd call to get the
4193sender_ident. */
4194
4195else if (is_inetd)
4196 {
4197 fclose(stderr);
4198 exim_nullstd(); /* Re-open to /dev/null */
4199 verify_get_ident(IDENT_PORT);
4200 host_build_sender_fullhost();
4201 set_process_info("handling incoming connection from %s via inetd",
4202 sender_fullhost);
4203 }
4204
4205/* If the sender host address has been set, build sender_fullhost if it hasn't
4206already been done (which it will have been for inetd). This caters for the
4207case when it is forced by -oMa. However, we must flag that it isn't a socket,
4208so that the test for IP options is skipped for -bs input. */
4209
4210if (sender_host_address != NULL && sender_fullhost == NULL)
4211 {
4212 host_build_sender_fullhost();
4213 set_process_info("handling incoming connection from %s via -oMa",
4214 sender_fullhost);
4215 sender_host_notsocket = TRUE;
4216 }
4217
4218/* Otherwise, set the sender host as unknown except for inetd calls. This
4219prevents host checking in the case of -bs not from inetd and also for -bS. */
4220
4221else if (!is_inetd) sender_host_unknown = TRUE;
4222
4223/* If stdout does not exist, then dup stdin to stdout. This can happen
4224if exim is started from inetd. In this case fd 0 will be set to the socket,
4225but fd 1 will not be set. This also happens for passed SMTP channels. */
4226
4227if (fstat(1, &statbuf) < 0) dup2(0, 1);
4228
4229/* Set up the incoming protocol name and the state of the program. Root
4230is allowed to force received protocol via the -oMr option above, and if we are
4231in a non-local SMTP state it means we have come via inetd and the process info
4232has already been set up. We don't set received_protocol here for smtp input,
4233as it varies according to batch/HELO/EHLO/AUTH/TLS. */
4234
4235if (smtp_input)
4236 {
4237 if (sender_local) set_process_info("accepting a local SMTP message from <%s>",
4238 sender_address);
4239 }
4240else
4241 {
4242 if (received_protocol == NULL)
42