1 /* $Cambridge: exim/src/src/exim.c,v 1.64 2009/10/16 08:51:34 tom Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 int options = PCRE_COPT;
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
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
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
123 if (n == 0) n = EXPAND_MAXN + 1;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
150 Argument: the signal number (SIGUSR1)
155 usr1_handler(int sig)
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
160 os_restarting_signal(SIGUSR1, usr1_handler);
165 /*************************************************
167 *************************************************/
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
179 Argument: the signal value (SIGALRM)
184 sigalrm_handler(int sig)
186 sig = sig; /* Keep picky compilers happy */
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
204 Argument: an itimerval structure containing the interval
209 milliwait(struct itimerval *itval)
212 sigset_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 */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
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 */
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
236 Argument: number of millseconds
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
262 Returns: -1, 0, or +1
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
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)
303 exim_wait_tick(struct timeval *then_tv, int resolution)
305 struct timeval now_tv;
306 long int now_true_usec;
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
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;
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. */
325 if (itval.it_value.tv_usec < 0)
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
331 DEBUG(D_transport|D_receive)
333 if (!running_in_test_harness)
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);
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
356 Arguments: format and arguments, as for printf()
361 set_process_info(char *format, ...)
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
378 /*************************************************
379 * Call fopen() with umask 777 and adjust mode *
380 *************************************************/
382 /* Exim runs with umask(0) so that files created with open() have the mode that
383 is specified in the open() call. However, there are some files, typically in
384 the spool directory, that are created with fopen(). They end up world-writeable
385 if no precautions are taken. Although the spool directory is not accessible to
386 the world, this is an untidiness. So this is a wrapper function for fopen()
387 that sorts out the mode of the created file.
390 filename the file name
391 options the fopen() options
392 mode the required mode
394 Returns: the fopened FILE or NULL
398 modefopen(uschar *filename, char *options, mode_t mode)
400 mode_t saved_umask = umask(0777);
401 FILE *f = Ufopen(filename, options);
402 (void)umask(saved_umask);
403 if (f != NULL) (void)fchmod(fileno(f), mode);
410 /*************************************************
411 * Ensure stdin, stdout, and stderr exist *
412 *************************************************/
414 /* Some operating systems grumble if an exec() happens without a standard
415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416 file will be opened and will use these fd values, and then some other bit of
417 code will assume, for example, that it can write error messages to stderr.
418 This function ensures that fds 0, 1, and 2 are open if they do not already
419 exist, by connecting them to /dev/null.
421 This function is also used to ensure that std{in,out,err} exist at all times,
422 so that if any library that Exim calls tries to use them, it doesn't crash.
434 for (i = 0; i <= 2; i++)
436 if (fstat(i, &statbuf) < 0 && errno == EBADF)
438 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
439 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
440 string_open_failed(errno, "/dev/null"));
441 if (devnull != i) (void)dup2(devnull, i);
444 if (devnull > 2) (void)close(devnull);
450 /*************************************************
451 * Close unwanted file descriptors for delivery *
452 *************************************************/
454 /* This function is called from a new process that has been forked to deliver
455 an incoming message, either directly, or using exec.
457 We want any smtp input streams to be closed in this new process. However, it
458 has been observed that using fclose() here causes trouble. When reading in -bS
459 input, duplicate copies of messages have been seen. The files will be sharing a
460 file pointer with the parent process, and it seems that fclose() (at least on
461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462 least sometimes. Hence we go for closing the underlying file descriptors.
464 If TLS is active, we want to shut down the TLS library, but without molesting
465 the parent's SSL connection.
467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
468 stderr unless debugging) because the calling process might have set them up as
469 pipes and be waiting for them to close before it waits for the submission
470 process to terminate. If they aren't closed, they hold up the calling process
471 until the initial delivery process finishes, which is not what we want.
473 Exception: We do want it for synchronous delivery!
475 And notwithstanding all the above, if D_resolver is set, implying resolver
476 debugging, leave stdout open, because that's where the resolver writes its
479 When we close stderr (which implies we've also closed stdout), we also get rid
480 of any controlling terminal.
492 tls_close(FALSE); /* Shut down the TLS library */
494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
500 (void)close(0); /* stdin */
501 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
502 if (debug_selector == 0) /* stderr */
504 if (!synchronous_delivery)
517 /*************************************************
519 *************************************************/
521 /* This function sets a new uid and gid permanently, optionally calling
522 initgroups() to set auxiliary groups. There are some special cases when running
523 Exim in unprivileged modes. In these situations the effective uid will not be
524 root; if we already have the right effective uid/gid, and don't need to
525 initialize any groups, leave things as they are.
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
533 Returns: nothing; bombs out on failure
537 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
539 uid_t euid = geteuid();
540 gid_t egid = getegid();
542 if (euid == root_uid || euid != uid || egid != gid || igflag)
544 /* At least one OS returns +1 for initgroups failure, so just check for
549 struct passwd *pw = getpwuid(uid);
552 if (initgroups(pw->pw_name, gid) != 0)
553 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
554 (long int)uid, strerror(errno));
556 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid);
560 if (setgid(gid) < 0 || setuid(uid) < 0)
562 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
567 /* Debugging output included uid/gid and all groups */
572 gid_t group_list[NGROUPS_MAX];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count = getgroups(NGROUPS_MAX, group_list);
576 debug_printf(" auxiliary group list:");
580 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
582 else debug_printf(" <none>");
590 /*************************************************
592 *************************************************/
594 /* Exim exits via this function so that it always clears up any open
600 Returns: does not return
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
616 /*************************************************
617 * Extract port from host address *
618 *************************************************/
620 /* Called to extract the port from the values given to -oMa and -oMi.
621 It also checks the syntax of the address, and terminates it before the
622 port data when a port is extracted.
625 address the address, with possible port on the end
627 Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
632 check_port(uschar *address)
634 int port = host_address_extract_port(address);
635 if (string_is_ip_address(address, NULL) == 0)
637 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
645 /*************************************************
646 * Test/verify an address *
647 *************************************************/
649 /* This function is called by the -bv and -bt code. It extracts a working
650 address from a full RFC 822 address. This isn't really necessary per se, but it
651 has the effect of collapsing source routes.
655 flags flag bits for verify_address()
656 exit_value to be set for failures
662 test_address(uschar *s, int flags, int *exit_value)
664 int start, end, domain;
665 uschar *parse_error = NULL;
666 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
670 fprintf(stdout, "syntax error: %s\n", parse_error);
675 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
676 -1, -1, NULL, NULL, NULL);
677 if (rc == FAIL) *exit_value = 2;
678 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
684 /*************************************************
685 * Decode bit settings for log/debug *
686 *************************************************/
688 /* This function decodes a string containing bit settings in the form of +name
689 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
690 also recognizes a numeric setting of the form =<number>, but this is not
691 intended for user use. It's an easy way for Exim to pass the debug settings
692 when it is re-exec'ed.
694 The log options are held in two unsigned ints (because there became too many
695 for one). The top bit in the table means "put in 2nd selector". This does not
696 yet apply to debug options, so the "=" facility sets only the first selector.
698 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
699 It sets all the bits in both selectors. However, there is a facility for then
700 unsetting certain bits, because we want to turn off "memory" in the debug case.
702 A bad value for a debug setting is treated as an unknown option - error message
703 to stderr and die. For log settings, which come from the configuration file,
704 we write to the log on the way out...
707 selector1 address of the first bit string
708 selector2 address of the second bit string, or NULL
709 notall1 bits to exclude from "all" for selector1
710 notall2 bits to exclude from "all" for selector2
711 string the configured string
712 options the table of option names
714 which "log" or "debug"
716 Returns: nothing on success - bomb out on failure
720 decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
721 int notall2, uschar *string, bit_table *options, int count, uschar *which)
724 if (string == NULL) return;
728 char *end; /* Not uschar */
729 *selector1 = strtoul(CS string+1, &end, 0);
730 if (*end == 0) return;
731 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
736 /* Handle symbolic setting */
743 bit_table *start, *end;
745 while (isspace(*string)) string++;
746 if (*string == 0) return;
748 if (*string != '+' && *string != '-')
750 errmsg = string_sprintf("malformed %s_selector setting: "
751 "+ or - expected but found \"%s\"", which, string);
755 adding = *string++ == '+';
757 while (isalnum(*string) || *string == '_') string++;
761 end = options + count;
765 bit_table *middle = start + (end - start)/2;
766 int c = Ustrncmp(s, middle->name, len);
769 if (middle->name[len] != 0) c = -1; else
771 unsigned int bit = middle->bit;
772 unsigned int *selector;
774 /* The value with all bits set means "force all bits in both selectors"
775 in the case where two are being handled. However, the top bit in the
776 second selector is never set. When setting, some bits can be excluded.
779 if (bit == 0xffffffff)
783 *selector1 = 0xffffffff ^ notall1;
784 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
789 if (selector2 != NULL) *selector2 = 0;
793 /* Otherwise, the 0x80000000 bit means "this value, without the top
794 bit, belongs in the second selector". */
798 if ((bit & 0x80000000) != 0)
800 selector = selector2;
803 else selector = selector1;
804 if (adding) *selector |= bit; else *selector &= ~bit;
806 break; /* Out of loop to match selector name */
809 if (c < 0) end = middle; else start = middle + 1;
810 } /* Loop to match selector name */
814 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
815 adding? '+' : '-', len, s);
818 } /* Loop for selector names */
820 /* Handle disasters */
823 if (Ustrcmp(which, "debug") == 0)
825 fprintf(stderr, "exim: %s\n", errmsg);
828 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
833 /*************************************************
834 * Show supported features *
835 *************************************************/
837 /* This function is called for -bV and for -d to output the optional features
838 of the current Exim binary.
840 Arguments: a FILE for printing
845 show_whats_supported(FILE *f)
847 #ifdef DB_VERSION_STRING
848 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
849 #elif defined(BTREEVERSION) && defined(HASHVERSION)
851 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
853 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
855 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
856 fprintf(f, "Probably ndbm\n");
857 #elif defined(USE_TDB)
858 fprintf(f, "Using tdb\n");
861 fprintf(f, "Probably GDBM (native mode)\n");
863 fprintf(f, "Probably GDBM (compatibility mode)\n");
867 fprintf(f, "Support for:");
868 #ifdef SUPPORT_CRYPTEQ
869 fprintf(f, " crypteq");
872 fprintf(f, " iconv()");
877 #ifdef HAVE_SETCLASSRESOURCES
878 fprintf(f, " use_setclassresources");
887 fprintf(f, " Expand_dlfunc");
889 #ifdef USE_TCP_WRAPPERS
890 fprintf(f, " TCPwrappers");
894 fprintf(f, " GnuTLS");
896 fprintf(f, " OpenSSL");
899 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
900 fprintf(f, " translate_ip_address");
902 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
903 fprintf(f, " move_frozen_messages");
905 #ifdef WITH_CONTENT_SCAN
906 fprintf(f, " Content_Scanning");
911 #ifdef WITH_OLD_DEMIME
912 fprintf(f, " Old_Demime");
914 #ifdef EXPERIMENTAL_SPF
915 fprintf(f, " Experimental_SPF");
917 #ifdef EXPERIMENTAL_SRS
918 fprintf(f, " Experimental_SRS");
920 #ifdef EXPERIMENTAL_BRIGHTMAIL
921 fprintf(f, " Experimental_Brightmail");
923 #ifdef EXPERIMENTAL_DCC
924 fprintf(f, " Experimental_DCC");
928 fprintf(f, "Lookups:");
929 #ifdef LOOKUP_LSEARCH
930 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
936 fprintf(f, " dbm dbmnz");
939 fprintf(f, " dnsdb");
941 #ifdef LOOKUP_DSEARCH
942 fprintf(f, " dsearch");
945 fprintf(f, " ibase");
948 fprintf(f, " ldap ldapdn ldapm");
951 fprintf(f, " mysql");
954 fprintf(f, " nis nis0");
956 #ifdef LOOKUP_NISPLUS
957 fprintf(f, " nisplus");
960 fprintf(f, " oracle");
963 fprintf(f, " passwd");
966 fprintf(f, " pgsql");
969 fprintf(f, " sqlite");
972 fprintf(f, " testdb");
975 fprintf(f, " whoson");
979 fprintf(f, "Authenticators:");
981 fprintf(f, " cram_md5");
983 #ifdef AUTH_CYRUS_SASL
984 fprintf(f, " cyrus_sasl");
987 fprintf(f, " dovecot");
989 #ifdef AUTH_PLAINTEXT
990 fprintf(f, " plaintext");
997 fprintf(f, "Routers:");
999 fprintf(f, " accept");
1001 #ifdef ROUTER_DNSLOOKUP
1002 fprintf(f, " dnslookup");
1004 #ifdef ROUTER_IPLITERAL
1005 fprintf(f, " ipliteral");
1007 #ifdef ROUTER_IPLOOKUP
1008 fprintf(f, " iplookup");
1010 #ifdef ROUTER_MANUALROUTE
1011 fprintf(f, " manualroute");
1013 #ifdef ROUTER_QUERYPROGRAM
1014 fprintf(f, " queryprogram");
1016 #ifdef ROUTER_REDIRECT
1017 fprintf(f, " redirect");
1021 fprintf(f, "Transports:");
1022 #ifdef TRANSPORT_APPENDFILE
1023 fprintf(f, " appendfile");
1024 #ifdef SUPPORT_MAILDIR
1025 fprintf(f, "/maildir");
1027 #ifdef SUPPORT_MAILSTORE
1028 fprintf(f, "/mailstore");
1034 #ifdef TRANSPORT_AUTOREPLY
1035 fprintf(f, " autoreply");
1037 #ifdef TRANSPORT_LMTP
1038 fprintf(f, " lmtp");
1040 #ifdef TRANSPORT_PIPE
1041 fprintf(f, " pipe");
1043 #ifdef TRANSPORT_SMTP
1044 fprintf(f, " smtp");
1048 if (fixed_never_users[0] > 0)
1051 fprintf(f, "Fixed never_users: ");
1052 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1053 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1054 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1057 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1059 /* This runtime check is to help diagnose library linkage mismatches which
1060 result in segfaults and the like; as such, it's left until the end,
1061 just in case. There will still be a "Configuration file is" line still to
1064 tls_version_report(f);
1071 /*************************************************
1072 * Quote a local part *
1073 *************************************************/
1075 /* This function is used when a sender address or a From: or Sender: header
1076 line is being created from the caller's login, or from an authenticated_id. It
1077 applies appropriate quoting rules for a local part.
1079 Argument: the local part
1080 Returns: the local part, quoted if necessary
1084 local_part_quote(uschar *lpart)
1086 BOOL needs_quote = FALSE;
1091 for (t = lpart; !needs_quote && *t != 0; t++)
1093 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1094 (*t != '.' || t == lpart || t[1] == 0);
1097 if (!needs_quote) return lpart;
1100 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1104 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1107 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1110 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1111 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1112 yield = string_cat(yield, &size, &ptr, nq, 1);
1116 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1124 /*************************************************
1125 * Load readline() functions *
1126 *************************************************/
1128 /* This function is called from testing executions that read data from stdin,
1129 but only when running as the calling user. Currently, only -be does this. The
1130 function loads the readline() function library and passes back the functions.
1131 On some systems, it needs the curses library, so load that too, but try without
1132 it if loading fails. All this functionality has to be requested at build time.
1135 fn_readline_ptr pointer to where to put the readline pointer
1136 fn_addhist_ptr pointer to where to put the addhistory function
1138 Returns: the dlopen handle or NULL on failure
1142 set_readline(char * (**fn_readline_ptr)(char *),
1143 char * (**fn_addhist_ptr)(char *))
1146 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1148 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1149 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1151 if (dlhandle != NULL)
1153 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1154 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1158 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1167 /*************************************************
1168 * Get a line from stdin for testing things *
1169 *************************************************/
1171 /* This function is called when running tests that can take a number of lines
1172 of input (for example, -be and -bt). It handles continuations and trailing
1173 spaces. And prompting and a blank line output on eof. If readline() is in use,
1174 the arguments are non-NULL and provide the relevant functions.
1177 fn_readline readline function or NULL
1178 fn_addhist addhist function or NULL
1180 Returns: pointer to dynamic memory, or NULL at end of file
1184 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1189 uschar *yield = NULL;
1191 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1195 uschar buffer[1024];
1199 char *readline_line = NULL;
1200 if (fn_readline != NULL)
1202 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1203 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1204 p = US readline_line;
1209 /* readline() not in use */
1212 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1216 /* Handle the line */
1218 ss = p + (int)Ustrlen(p);
1219 while (ss > p && isspace(ss[-1])) ss--;
1223 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1226 yield = string_cat(yield, &size, &ptr, p, ss - p);
1229 if (fn_readline != NULL) free(readline_line);
1232 if (ss == p || yield[ptr-1] != '\\')
1240 if (yield == NULL) printf("\n");
1246 /*************************************************
1247 * Output usage information for the program *
1248 *************************************************/
1250 /* This function is called when there are no recipients
1251 or a specific --help argument was added.
1254 progname information on what name we were called by
1256 Returns: DOES NOT RETURN
1260 exim_usage(uschar *progname)
1263 /* Handle specific program invocation varients */
1264 if (Ustrcmp(progname, US"-mailq") == 0)
1267 "mailq - list the contents of the mail queue\n\n"
1268 "For a list of options, see the Exim documentation.\n");
1272 /* Generic usage - we output this whatever happens */
1274 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1275 "not directly from a shell command line. Options and/or arguments control\n"
1276 "what it does when called. For a list of options, see the Exim documentation.\n");
1283 /*************************************************
1284 * Entry point and high-level code *
1285 *************************************************/
1287 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1288 the appropriate action. All the necessary functions are present in the one
1289 binary. I originally thought one should split it up, but it turns out that so
1290 much of the apparatus is needed in each chunk that one might as well just have
1291 it all available all the time, which then makes the coding easier as well.
1294 argc count of entries in argv
1295 argv argument strings, with argv[0] being the program name
1297 Returns: EXIT_SUCCESS if terminated successfully
1298 EXIT_FAILURE otherwise, except when a message has been sent
1299 to the sender, and -oee was given
1303 main(int argc, char **cargv)
1305 uschar **argv = USS cargv;
1306 int arg_receive_timeout = -1;
1307 int arg_smtp_receive_timeout = -1;
1308 int arg_error_handling = error_handling;
1309 int filter_sfd = -1;
1310 int filter_ufd = -1;
1313 int list_queue_option = 0;
1315 int msg_action_arg = -1;
1316 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1317 int queue_only_reason = 0;
1319 int perl_start_option = 0;
1321 int recipients_arg = argc;
1322 int sender_address_domain = 0;
1323 int test_retry_arg = -1;
1324 int test_rewrite_arg = -1;
1325 BOOL arg_queue_only = FALSE;
1326 BOOL bi_option = FALSE;
1327 BOOL checking = FALSE;
1328 BOOL count_queue = FALSE;
1329 BOOL expansion_test = FALSE;
1330 BOOL extract_recipients = FALSE;
1331 BOOL forced_delivery = FALSE;
1332 BOOL f_end_dot = FALSE;
1333 BOOL deliver_give_up = FALSE;
1334 BOOL list_queue = FALSE;
1335 BOOL list_options = FALSE;
1336 BOOL local_queue_only;
1338 BOOL one_msg_action = FALSE;
1339 BOOL queue_only_set = FALSE;
1340 BOOL receiving_message = TRUE;
1341 BOOL sender_ident_set = FALSE;
1342 BOOL session_local_queue_only;
1344 BOOL removed_privilege = FALSE;
1345 BOOL usage_wanted = FALSE;
1346 BOOL verify_address_mode = FALSE;
1347 BOOL verify_as_sender = FALSE;
1348 BOOL version_printed = FALSE;
1349 uschar *alias_arg = NULL;
1350 uschar *called_as = US"";
1351 uschar *start_queue_run_id = NULL;
1352 uschar *stop_queue_run_id = NULL;
1353 uschar *expansion_test_message = NULL;
1354 uschar *ftest_domain = NULL;
1355 uschar *ftest_localpart = NULL;
1356 uschar *ftest_prefix = NULL;
1357 uschar *ftest_suffix = NULL;
1358 uschar *real_sender_address;
1359 uschar *originator_home = US"/";
1363 struct stat statbuf;
1364 pid_t passed_qr_pid = (pid_t)0;
1365 int passed_qr_pipe = -1;
1366 gid_t group_list[NGROUPS_MAX];
1368 /* Possible options for -R and -S */
1370 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1372 /* Need to define this in case we need to change the environment in order
1373 to get rid of a bogus time zone. We have to make it char rather than uschar
1374 because some OS define it in /usr/include/unistd.h. */
1376 extern char **environ;
1378 /* If the Exim user and/or group and/or the configuration file owner/group were
1379 defined by ref:name at build time, we must now find the actual uid/gid values.
1380 This is a feature to make the lives of binary distributors easier. */
1382 #ifdef EXIM_USERNAME
1383 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1385 exim_gid = pw->pw_gid;
1389 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1395 #ifdef EXIM_GROUPNAME
1396 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1398 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1404 #ifdef CONFIGURE_OWNERNAME
1405 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1407 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1408 CONFIGURE_OWNERNAME);
1413 #ifdef CONFIGURE_GROUPNAME
1414 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1416 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1417 CONFIGURE_GROUPNAME);
1422 /* In the Cygwin environment, some initialization needs doing. It is fudged
1423 in by means of this macro. */
1429 /* Check a field which is patched when we are running Exim within its
1430 testing harness; do a fast initial check, and then the whole thing. */
1432 running_in_test_harness =
1433 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1435 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1436 at the start of a program; however, it seems that some environments do not
1437 follow this. A "strange" locale can affect the formatting of timestamps, so we
1440 setlocale(LC_ALL, "C");
1442 /* Set up the default handler for timing using alarm(). */
1444 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1446 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1447 because store_malloc writes a log entry on failure. */
1449 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1450 if (log_buffer == NULL)
1452 fprintf(stderr, "exim: failed to get store for log buffer\n");
1456 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1457 NULL when the daemon is run and the file is closed. We have to use this
1458 indirection, because some systems don't allow writing to the variable "stderr".
1461 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1463 /* Arrange for the PCRE regex library to use our store functions. Note that
1464 the normal calls are actually macros that add additional arguments for
1465 debugging purposes so we have to assign specially constructed functions here.
1466 The default is to use store in the stacking pool, but this is overridden in the
1467 regex_must_compile() function. */
1469 pcre_malloc = function_store_get;
1470 pcre_free = function_dummy_free;
1472 /* Ensure there is a big buffer for temporary use in several places. It is put
1473 in malloc store so that it can be freed for enlargement if necessary. */
1475 big_buffer = store_malloc(big_buffer_size);
1477 /* Set up the handler for the data request signal, and set the initial
1478 descriptive text. */
1480 set_process_info("initializing");
1481 os_restarting_signal(SIGUSR1, usr1_handler);
1483 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1484 in the daemon code. For the rest of Exim's uses, we ignore it. */
1486 signal(SIGHUP, SIG_IGN);
1488 /* We don't want to die on pipe errors as the code is written to handle
1489 the write error instead. */
1491 signal(SIGPIPE, SIG_IGN);
1493 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1494 set to SIG_IGN. This causes subprocesses that complete before the parent
1495 process waits for them not to hang around, so when Exim calls wait(), nothing
1496 is there. The wait() code has been made robust against this, but let's ensure
1497 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1498 ending status. We use sigaction rather than plain signal() on those OS where
1499 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1500 problem on AIX with this.) */
1504 struct sigaction act;
1505 act.sa_handler = SIG_DFL;
1506 sigemptyset(&(act.sa_mask));
1508 sigaction(SIGCHLD, &act, NULL);
1511 signal(SIGCHLD, SIG_DFL);
1514 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1519 /* Set up the version number. Set up the leading 'E' for the external form of
1520 message ids, set the pointer to the internal form, and initialize it to
1521 indicate no message being processed. */
1524 message_id_option[0] = '-';
1525 message_id_external = message_id_option + 1;
1526 message_id_external[0] = 'E';
1527 message_id = message_id_external + 1;
1530 /* Set the umask to zero so that any files Exim creates using open() are
1531 created with the modes that it specifies. NOTE: Files created with fopen() have
1532 a problem, which was not recognized till rather late (February 2006). With this
1533 umask, such files will be world writeable. (They are all content scanning files
1534 in the spool directory, which isn't world-accessible, so this is not a
1535 disaster, but it's untidy.) I don't want to change this overall setting,
1536 however, because it will interact badly with the open() calls. Instead, there's
1537 now a function called modefopen() that fiddles with the umask while calling
1542 /* Precompile the regular expression for matching a message id. Keep this in
1543 step with the code that generates ids in the accept.c module. We need to do
1544 this here, because the -M options check their arguments for syntactic validity
1545 using mac_ismsgid, which uses this. */
1548 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1550 /* Precompile the regular expression that is used for matching an SMTP error
1551 code, possibly extended, at the start of an error message. Note that the
1552 terminating whitespace character is included. */
1555 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1558 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1559 this seems to be a generally accepted convention, since one finds symbolic
1560 links called "mailq" in standard OS configurations. */
1562 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1563 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1566 receiving_message = FALSE;
1567 called_as = US"-mailq";
1570 /* If the program is called as "rmail" treat it as equivalent to
1571 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1572 i.e. preventing a single dot on a line from terminating the message, and
1573 returning with zero return code, even in cases of error (provided an error
1574 message has been sent). */
1576 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1577 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1580 called_as = US"-rmail";
1581 errors_sender_rc = EXIT_SUCCESS;
1584 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1585 this is a smail convention. */
1587 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1588 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1590 smtp_input = smtp_batched_input = TRUE;
1591 called_as = US"-rsmtp";
1594 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1595 this is a smail convention. */
1597 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1598 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1601 receiving_message = FALSE;
1602 called_as = US"-runq";
1605 /* If the program is called as "newaliases" treat it as equivalent to
1606 "exim -bi"; this is a sendmail convention. */
1608 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1609 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1612 receiving_message = FALSE;
1613 called_as = US"-newaliases";
1616 /* Save the original effective uid for a couple of uses later. It should
1617 normally be root, but in some esoteric environments it may not be. */
1619 original_euid = geteuid();
1621 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1622 to be the same as the real ones. This makes a difference only if Exim is setuid
1623 (or setgid) to something other than root, which could be the case in some
1624 special configurations. */
1626 real_uid = getuid();
1627 real_gid = getgid();
1629 if (real_uid == root_uid)
1635 /* If neither the original real uid nor the original euid was root, Exim is
1636 running in an unprivileged state. */
1638 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1640 /* If the first argument is --help, set usage_wanted and pretend there
1641 are no arguments. This will cause a brief message to be given. We do
1642 the message generation downstream so we can pick up how we were invoked */
1644 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0)
1647 usage_wanted = TRUE;
1650 /* Scan the program's arguments. Some can be dealt with right away; others are
1651 simply recorded for checking and handling afterwards. Do a high-level switch
1652 on the second character (the one after '-'), to save some effort. */
1654 for (i = 1; i < argc; i++)
1656 BOOL badarg = FALSE;
1657 uschar *arg = argv[i];
1661 /* An argument not starting with '-' is the start of a recipients list;
1662 break out of the options-scanning loop. */
1670 /* An option consistion of -- terminates the options */
1672 if (Ustrcmp(arg, "--") == 0)
1674 recipients_arg = i + 1;
1678 /* Handle flagged options */
1680 switchchar = arg[1];
1683 /* Make all -ex options synonymous with -oex arguments, since that
1684 is assumed by various callers. Also make -qR options synonymous with -R
1685 options, as that seems to be required as well. Allow for -qqR too, and
1686 the same for -S options. */
1688 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1689 Ustrncmp(arg+1, "qR", 2) == 0 ||
1690 Ustrncmp(arg+1, "qS", 2) == 0)
1692 switchchar = arg[2];
1695 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1697 switchchar = arg[3];
1699 queue_2stage = TRUE;
1702 /* Make -r synonymous with -f, since it is a documented alias */
1704 else if (arg[1] == 'r') switchchar = 'f';
1706 /* Make -ov synonymous with -v */
1708 else if (Ustrcmp(arg, "-ov") == 0)
1714 /* High-level switch on active initial letter */
1718 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1719 so has no need of it. */
1722 if (*argrest == 0) i++; /* Skip over the type */
1727 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1729 /* -bd: Run in daemon mode, awaiting SMTP connections.
1730 -bdf: Ditto, but in the foreground.
1733 if (*argrest == 'd')
1735 daemon_listen = TRUE;
1736 if (*(++argrest) == 'f') background_daemon = FALSE;
1737 else if (*argrest != 0) { badarg = TRUE; break; }
1740 /* -be: Run in expansion test mode
1741 -bem: Ditto, but read a message from a file first
1744 else if (*argrest == 'e')
1746 expansion_test = checking = TRUE;
1747 if (argrest[1] == 'm')
1749 if (++i >= argc) { badarg = TRUE; break; }
1750 expansion_test_message = argv[i];
1753 if (argrest[1] != 0) { badarg = TRUE; break; }
1756 /* -bF: Run system filter test */
1758 else if (*argrest == 'F')
1760 filter_test |= FTEST_SYSTEM;
1761 if (*(++argrest) != 0) { badarg = TRUE; break; }
1762 if (++i < argc) filter_test_sfile = argv[i]; else
1764 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1769 /* -bf: Run user filter test
1770 -bfd: Set domain for filter testing
1771 -bfl: Set local part for filter testing
1772 -bfp: Set prefix for filter testing
1773 -bfs: Set suffix for filter testing
1776 else if (*argrest == 'f')
1778 if (*(++argrest) == 0)
1780 filter_test |= FTEST_USER;
1781 if (++i < argc) filter_test_ufile = argv[i]; else
1783 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1791 fprintf(stderr, "exim: string expected after %s\n", arg);
1794 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1795 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1796 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1797 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1798 else { badarg = TRUE; break; }
1802 /* -bh: Host checking - an IP address must follow. */
1804 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1806 if (++i >= argc) { badarg = TRUE; break; }
1807 sender_host_address = argv[i];
1808 host_checking = checking = log_testing_mode = TRUE;
1809 host_checking_callout = argrest[1] == 'c';
1812 /* -bi: This option is used by sendmail to initialize *the* alias file,
1813 though it has the -oA option to specify a different file. Exim has no
1814 concept of *the* alias file, but since Sun's YP make script calls
1815 sendmail this way, some support must be provided. */
1817 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1819 /* -bm: Accept and deliver message - the default option. Reinstate
1820 receiving_message, which got turned off for all -b options. */
1822 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1824 /* -bnq: For locally originating messages, do not qualify unqualified
1825 addresses. In the envelope, this causes errors; in header lines they
1828 else if (Ustrcmp(argrest, "nq") == 0)
1830 allow_unqualified_sender = FALSE;
1831 allow_unqualified_recipient = FALSE;
1834 /* -bpxx: List the contents of the mail queue, in various forms. If
1835 the option is -bpc, just a queue count is needed. Otherwise, if the
1836 first letter after p is r, then order is random. */
1838 else if (*argrest == 'p')
1840 if (*(++argrest) == 'c')
1843 if (*(++argrest) != 0) badarg = TRUE;
1847 if (*argrest == 'r')
1849 list_queue_option = 8;
1852 else list_queue_option = 0;
1856 /* -bp: List the contents of the mail queue, top-level only */
1858 if (*argrest == 0) {}
1860 /* -bpu: List the contents of the mail queue, top-level undelivered */
1862 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1864 /* -bpa: List the contents of the mail queue, including all delivered */
1866 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1868 /* Unknown after -bp[r] */
1878 /* -bP: List the configuration variables given as the address list.
1879 Force -v, so configuration errors get displayed. */
1881 else if (Ustrcmp(argrest, "P") == 0)
1883 list_options = TRUE;
1884 debug_selector |= D_v;
1885 debug_file = stderr;
1888 /* -brt: Test retry configuration lookup */
1890 else if (Ustrcmp(argrest, "rt") == 0)
1892 test_retry_arg = i + 1;
1896 /* -brw: Test rewrite configuration */
1898 else if (Ustrcmp(argrest, "rw") == 0)
1900 test_rewrite_arg = i + 1;
1904 /* -bS: Read SMTP commands on standard input, but produce no replies -
1905 all errors are reported by sending messages. */
1907 else if (Ustrcmp(argrest, "S") == 0)
1908 smtp_input = smtp_batched_input = receiving_message = TRUE;
1910 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1911 on standard output. */
1913 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1915 /* -bt: address testing mode */
1917 else if (Ustrcmp(argrest, "t") == 0)
1918 address_test_mode = checking = log_testing_mode = TRUE;
1920 /* -bv: verify addresses */
1922 else if (Ustrcmp(argrest, "v") == 0)
1923 verify_address_mode = checking = log_testing_mode = TRUE;
1925 /* -bvs: verify sender addresses */
1927 else if (Ustrcmp(argrest, "vs") == 0)
1929 verify_address_mode = checking = log_testing_mode = TRUE;
1930 verify_as_sender = TRUE;
1933 /* -bV: Print version string and support details */
1935 else if (Ustrcmp(argrest, "V") == 0)
1937 printf("Exim version %s #%s built %s\n", version_string,
1938 version_cnumber, version_date);
1939 printf("%s\n", CS version_copyright);
1940 version_printed = TRUE;
1941 show_whats_supported(stdout);
1948 /* -C: change configuration file list; ignore if it isn't really
1949 a change! Enforce a prefix check if required. */
1954 if(++i < argc) argrest = argv[i]; else
1955 { badarg = TRUE; break; }
1957 if (Ustrcmp(config_main_filelist, argrest) != 0)
1959 #ifdef ALT_CONFIG_PREFIX
1961 int len = Ustrlen(ALT_CONFIG_PREFIX);
1962 uschar *list = argrest;
1964 while((filename = string_nextinlist(&list, &sep, big_buffer,
1965 big_buffer_size)) != NULL)
1967 if ((Ustrlen(filename) < len ||
1968 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1969 Ustrstr(filename, "/../") != NULL) &&
1970 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1972 fprintf(stderr, "-C Permission denied\n");
1978 config_main_filelist = argrest;
1979 config_changed = TRUE;
1984 /* -D: set up a macro definition */
1987 #ifdef DISABLE_D_OPTION
1988 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1993 macro_item *mlast = NULL;
1996 uschar *s = argrest;
1998 while (isspace(*s)) s++;
2000 if (*s < 'A' || *s > 'Z')
2002 fprintf(stderr, "exim: macro name set by -D must start with "
2003 "an upper case letter\n");
2007 while (isalnum(*s) || *s == '_')
2009 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2013 if (ptr == 0) { badarg = TRUE; break; }
2014 while (isspace(*s)) s++;
2017 if (*s++ != '=') { badarg = TRUE; break; }
2018 while (isspace(*s)) s++;
2021 for (m = macros; m != NULL; m = m->next)
2023 if (Ustrcmp(m->name, name) == 0)
2025 fprintf(stderr, "exim: duplicated -D in command line\n");
2031 m = store_get(sizeof(macro_item) + Ustrlen(name));
2033 m->command_line = TRUE;
2034 if (mlast == NULL) macros = m; else mlast->next = m;
2035 Ustrcpy(m->name, name);
2036 m->replacement = string_copy(s);
2038 if (clmacro_count >= MAX_CLMACROS)
2040 fprintf(stderr, "exim: too many -D options on command line\n");
2043 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2049 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2050 The latter is now a no-op, retained for compatibility only. If -dd is used,
2051 debugging subprocesses of the daemon is disabled. */
2054 if (Ustrcmp(argrest, "ropcr") == 0)
2056 /* drop_cr = TRUE; */
2059 /* Use an intermediate variable so that we don't set debugging while
2060 decoding the debugging bits. */
2064 unsigned int selector = D_default;
2067 if (*argrest == 'd')
2069 debug_daemon = TRUE;
2073 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2074 debug_options_count, US"debug");
2075 debug_selector = selector;
2080 /* -E: This is a local error message. This option is not intended for
2081 external use at all, but is not restricted to trusted callers because it
2082 does no harm (just suppresses certain error messages) and if Exim is run
2083 not setuid root it won't always be trusted when it generates error
2084 messages using this option. If there is a message id following -E, point
2085 message_reference at it, for logging. */
2088 local_error_message = TRUE;
2089 if (mac_ismsgid(argrest)) message_reference = argrest;
2093 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2094 option, so it looks as if historically the -oex options are also callable
2095 without the leading -o. So we have to accept them. Before the switch,
2096 anything starting -oe has been converted to -e. Exim does not support all
2097 of the sendmail error options. */
2100 if (Ustrcmp(argrest, "e") == 0)
2102 arg_error_handling = ERRORS_SENDER;
2103 errors_sender_rc = EXIT_SUCCESS;
2105 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2106 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2107 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2108 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2113 /* -F: Set sender's full name, used instead of the gecos entry from
2114 the password file. Since users can usually alter their gecos entries,
2115 there's no security involved in using this instead. The data can follow
2116 the -F or be in the next argument. */
2121 if(++i < argc) argrest = argv[i]; else
2122 { badarg = TRUE; break; }
2124 originator_name = argrest;
2125 sender_name_forced = TRUE;
2129 /* -f: Set sender's address - this value is only actually used if Exim is
2130 run by a trusted user, or if untrusted_set_sender is set and matches the
2131 address, except that the null address can always be set by any user. The
2132 test for this happens later, when the value given here is ignored when not
2133 permitted. For an untrusted user, the actual sender is still put in Sender:
2134 if it doesn't match the From: header (unless no_local_from_check is set).
2135 The data can follow the -f or be in the next argument. The -r switch is an
2136 obsolete form of -f but since there appear to be programs out there that
2137 use anything that sendmail has ever supported, better accept it - the
2138 synonymizing is done before the switch above.
2140 At this stage, we must allow domain literal addresses, because we don't
2141 know what the setting of allow_domain_literals is yet. Ditto for trailing
2142 dots and strip_trailing_dot. */
2150 if (i+1 < argc) argrest = argv[++i]; else
2151 { badarg = TRUE; break; }
2155 sender_address = string_sprintf(""); /* Ensure writeable memory */
2159 uschar *temp = argrest + Ustrlen(argrest) - 1;
2160 while (temp >= argrest && isspace(*temp)) temp--;
2161 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2162 allow_domain_literals = TRUE;
2163 strip_trailing_dot = TRUE;
2164 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2165 &sender_address_domain, TRUE);
2166 allow_domain_literals = FALSE;
2167 strip_trailing_dot = FALSE;
2168 if (sender_address == NULL)
2170 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2171 return EXIT_FAILURE;
2174 sender_address_forced = TRUE;
2178 /* This is some Sendmail thing which can be ignored */
2183 /* -h: Set the hop count for an incoming message. Exim does not currently
2184 support this; it always computes it by counting the Received: headers.
2185 To put it in will require a change to the spool header file format. */
2190 if(++i < argc) argrest = argv[i]; else
2191 { badarg = TRUE; break; }
2193 if (!isdigit(*argrest)) badarg = TRUE;
2197 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2198 not to be documented for sendmail but mailx (at least) uses it) */
2201 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2206 receiving_message = FALSE;
2208 /* -MC: continue delivery of another message via an existing open
2209 file descriptor. This option is used for an internal call by the
2210 smtp transport when there is a pending message waiting to go to an
2211 address to which it has got a connection. Five subsequent arguments are
2212 required: transport name, host name, IP address, sequence number, and
2213 message_id. Transports may decline to create new processes if the sequence
2214 number gets too big. The channel is stdin. This (-MC) must be the last
2215 argument. There's a subsequent check that the real-uid is privileged.
2217 If we are running in the test harness. delay for a bit, to let the process
2218 that set this one up complete. This makes for repeatability of the logging,
2221 if (Ustrcmp(argrest, "C") == 0)
2223 union sockaddr_46 interface_sock;
2224 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2228 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2229 return EXIT_FAILURE;
2232 if (msg_action_arg >= 0)
2234 fprintf(stderr, "exim: incompatible arguments\n");
2235 return EXIT_FAILURE;
2238 continue_transport = argv[++i];
2239 continue_hostname = argv[++i];
2240 continue_host_address = argv[++i];
2241 continue_sequence = Uatoi(argv[++i]);
2242 msg_action = MSG_DELIVER;
2243 msg_action_arg = ++i;
2244 forced_delivery = TRUE;
2245 queue_run_pid = passed_qr_pid;
2246 queue_run_pipe = passed_qr_pipe;
2248 if (!mac_ismsgid(argv[i]))
2250 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2252 return EXIT_FAILURE;
2255 /* Set up $sending_ip_address and $sending_port */
2257 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2259 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2263 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2265 return EXIT_FAILURE;
2268 if (running_in_test_harness) millisleep(500);
2272 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2273 precedes -MC (see above). The flag indicates that the host to which
2274 Exim is connected has accepted an AUTH sequence. */
2276 else if (Ustrcmp(argrest, "CA") == 0)
2278 smtp_authenticated = TRUE;
2282 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2283 it preceded -MC (see above) */
2285 else if (Ustrcmp(argrest, "CP") == 0)
2287 smtp_use_pipelining = TRUE;
2291 /* -MCQ: pass on the pid of the queue-running process that started
2292 this chain of deliveries and the fd of its synchronizing pipe; this
2293 is useful only when it precedes -MC (see above) */
2295 else if (Ustrcmp(argrest, "CQ") == 0)
2297 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2299 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2304 /* -MCS: set the smtp_use_size flag; this is useful only when it
2305 precedes -MC (see above) */
2307 else if (Ustrcmp(argrest, "CS") == 0)
2309 smtp_use_size = TRUE;
2313 /* -MCT: set the tls_offered flag; this is useful only when it
2314 precedes -MC (see above). The flag indicates that the host to which
2315 Exim is connected has offered TLS support. */
2318 else if (Ustrcmp(argrest, "CT") == 0)
2325 /* -M[x]: various operations on the following list of message ids:
2326 -M deliver the messages, ignoring next retry times and thawing
2327 -Mc deliver the messages, checking next retry times, no thawing
2328 -Mf freeze the messages
2329 -Mg give up on the messages
2330 -Mt thaw the messages
2331 -Mrm remove the messages
2332 In the above cases, this must be the last option. There are also the
2333 following options which are followed by a single message id, and which
2334 act on that message. Some of them use the "recipient" addresses as well.
2335 -Mar add recipient(s)
2336 -Mmad mark all recipients delivered
2337 -Mmd mark recipients(s) delivered
2339 -Mset load a message for use with -be
2341 -Mvc show copy (of whole message, in RFC 2822 format)
2346 else if (*argrest == 0)
2348 msg_action = MSG_DELIVER;
2349 forced_delivery = deliver_force_thaw = TRUE;
2351 else if (Ustrcmp(argrest, "ar") == 0)
2353 msg_action = MSG_ADD_RECIPIENT;
2354 one_msg_action = TRUE;
2356 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2357 else if (Ustrcmp(argrest, "es") == 0)
2359 msg_action = MSG_EDIT_SENDER;
2360 one_msg_action = TRUE;
2362 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2363 else if (Ustrcmp(argrest, "g") == 0)
2365 msg_action = MSG_DELIVER;
2366 deliver_give_up = TRUE;
2368 else if (Ustrcmp(argrest, "mad") == 0)
2370 msg_action = MSG_MARK_ALL_DELIVERED;
2372 else if (Ustrcmp(argrest, "md") == 0)
2374 msg_action = MSG_MARK_DELIVERED;
2375 one_msg_action = TRUE;
2377 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2378 else if (Ustrcmp(argrest, "set") == 0)
2380 msg_action = MSG_LOAD;
2381 one_msg_action = TRUE;
2383 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2384 else if (Ustrcmp(argrest, "vb") == 0)
2386 msg_action = MSG_SHOW_BODY;
2387 one_msg_action = TRUE;
2389 else if (Ustrcmp(argrest, "vc") == 0)
2391 msg_action = MSG_SHOW_COPY;
2392 one_msg_action = TRUE;
2394 else if (Ustrcmp(argrest, "vh") == 0)
2396 msg_action = MSG_SHOW_HEADER;
2397 one_msg_action = TRUE;
2399 else if (Ustrcmp(argrest, "vl") == 0)
2401 msg_action = MSG_SHOW_LOG;
2402 one_msg_action = TRUE;
2404 else { badarg = TRUE; break; }
2406 /* All the -Mxx options require at least one message id. */
2408 msg_action_arg = i + 1;
2409 if (msg_action_arg >= argc)
2411 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2412 return EXIT_FAILURE;
2415 /* Some require only message ids to follow */
2417 if (!one_msg_action)
2420 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2422 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2424 return EXIT_FAILURE;
2426 goto END_ARG; /* Remaining args are ids */
2429 /* Others require only one message id, possibly followed by addresses,
2430 which will be handled as normal arguments. */
2434 if (!mac_ismsgid(argv[msg_action_arg]))
2436 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2437 argv[msg_action_arg], arg);
2438 return EXIT_FAILURE;
2445 /* Some programs seem to call the -om option without the leading o;
2446 for sendmail it askes for "me too". Exim always does this. */
2449 if (*argrest != 0) badarg = TRUE;
2453 /* -N: don't do delivery - a debugging option that stops transports doing
2454 their thing. It implies debugging at the D_v level. */
2459 dont_deliver = TRUE;
2460 debug_selector |= D_v;
2461 debug_file = stderr;
2467 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2473 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2474 option to the specified value. This form uses long names. We need to handle
2475 -O option=value and -Ooption=value. */
2482 fprintf(stderr, "exim: string expected after -O\n");
2490 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2493 if (*argrest == 'A')
2495 alias_arg = argrest + 1;
2496 if (alias_arg[0] == 0)
2498 if (i+1 < argc) alias_arg = argv[++i]; else
2500 fprintf(stderr, "exim: string expected after -oA\n");
2506 /* -oB: Set a connection message max value for remote deliveries */
2508 else if (*argrest == 'B')
2510 uschar *p = argrest + 1;
2513 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2515 connection_max_messages = 1;
2524 fprintf(stderr, "exim: number expected after -oB\n");
2527 connection_max_messages = Uatoi(p);
2531 /* -odb: background delivery */
2533 else if (Ustrcmp(argrest, "db") == 0)
2535 synchronous_delivery = FALSE;
2536 arg_queue_only = FALSE;
2537 queue_only_set = TRUE;
2540 /* -odf: foreground delivery (smail-compatible option); same effect as
2541 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2544 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2546 synchronous_delivery = TRUE;
2547 arg_queue_only = FALSE;
2548 queue_only_set = TRUE;
2551 /* -odq: queue only */
2553 else if (Ustrcmp(argrest, "dq") == 0)
2555 synchronous_delivery = FALSE;
2556 arg_queue_only = TRUE;
2557 queue_only_set = TRUE;
2560 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2561 but no remote delivery */
2563 else if (Ustrcmp(argrest, "dqs") == 0)
2566 arg_queue_only = FALSE;
2567 queue_only_set = TRUE;
2570 /* -oex: Sendmail error flags. As these are also accepted without the
2571 leading -o prefix, for compatibility with vacation and other callers,
2572 they are handled with -e above. */
2574 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2575 -oitrue: Another sendmail syntax for the same */
2577 else if (Ustrcmp(argrest, "i") == 0 ||
2578 Ustrcmp(argrest, "itrue") == 0)
2581 /* -oM*: Set various characteristics for an incoming message; actually
2582 acted on for trusted callers only. */
2584 else if (*argrest == 'M')
2588 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2592 /* -oMa: Set sender host address */
2594 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2596 /* -oMaa: Set authenticator name */
2598 else if (Ustrcmp(argrest, "Maa") == 0)
2599 sender_host_authenticated = argv[++i];
2601 /* -oMas: setting authenticated sender */
2603 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2605 /* -oMai: setting authenticated id */
2607 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2609 /* -oMi: Set incoming interface address */
2611 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2613 /* -oMr: Received protocol */
2615 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2617 /* -oMs: Set sender host name */
2619 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2621 /* -oMt: Set sender ident */
2623 else if (Ustrcmp(argrest, "Mt") == 0)
2625 sender_ident_set = TRUE;
2626 sender_ident = argv[++i];
2629 /* Else a bad argument */
2638 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2639 seem to call this as -m (undocumented), so that is also accepted (see
2642 else if (Ustrcmp(argrest, "m") == 0) {}
2644 /* -oo: An ancient flag for old-style addresses which still seems to
2645 crop up in some calls (see in SCO). */
2647 else if (Ustrcmp(argrest, "o") == 0) {}
2649 /* -oP <name>: set pid file path for daemon */
2651 else if (Ustrcmp(argrest, "P") == 0)
2652 override_pid_file_path = argv[++i];
2654 /* -or <n>: set timeout for non-SMTP acceptance
2655 -os <n>: set timeout for SMTP acceptance */
2657 else if (*argrest == 'r' || *argrest == 's')
2659 int *tp = (*argrest == 'r')?
2660 &arg_receive_timeout : &arg_smtp_receive_timeout;
2661 if (argrest[1] == 0)
2663 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2665 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2668 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2673 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2675 else if (Ustrcmp(argrest, "X") == 0)
2676 override_local_interfaces = argv[++i];
2678 /* Unknown -o argument */
2684 /* -ps: force Perl startup; -pd force delayed Perl startup */
2688 if (*argrest == 's' && argrest[1] == 0)
2690 perl_start_option = 1;
2693 if (*argrest == 'd' && argrest[1] == 0)
2695 perl_start_option = -1;
2700 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2701 which sets the host protocol and host name */
2705 if (i+1 < argc) argrest = argv[++i]; else
2706 { badarg = TRUE; break; }
2711 uschar *hn = Ustrchr(argrest, ':');
2714 received_protocol = argrest;
2718 received_protocol = string_copyn(argrest, hn - argrest);
2719 sender_host_name = hn + 1;
2726 receiving_message = FALSE;
2727 if (queue_interval >= 0)
2729 fprintf(stderr, "exim: -q specified more than once\n");
2733 /* -qq...: Do queue runs in a 2-stage manner */
2735 if (*argrest == 'q')
2737 queue_2stage = TRUE;
2741 /* -qi...: Do only first (initial) deliveries */
2743 if (*argrest == 'i')
2745 queue_run_first_delivery = TRUE;
2749 /* -qf...: Run the queue, forcing deliveries
2750 -qff..: Ditto, forcing thawing as well */
2752 if (*argrest == 'f')
2754 queue_run_force = TRUE;
2755 if (*(++argrest) == 'f')
2757 deliver_force_thaw = TRUE;
2762 /* -q[f][f]l...: Run the queue only on local deliveries */
2764 if (*argrest == 'l')
2766 queue_run_local = TRUE;
2770 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2771 optionally starting from a given message id. */
2773 if (*argrest == 0 &&
2774 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2777 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2778 start_queue_run_id = argv[++i];
2779 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2780 stop_queue_run_id = argv[++i];
2783 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2784 optionally local only. */
2789 queue_interval = readconf_readtime(argrest, 0, FALSE);
2791 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2792 if (queue_interval <= 0)
2794 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2801 case 'R': /* Synonymous with -qR... */
2802 receiving_message = FALSE;
2804 /* -Rf: As -R (below) but force all deliveries,
2805 -Rff: Ditto, but also thaw all frozen messages,
2806 -Rr: String is regex
2807 -Rrf: Regex and force
2808 -Rrff: Regex and force and thaw
2810 in all cases provided there are no further characters in this
2816 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2818 if (Ustrcmp(argrest, rsopts[i]) == 0)
2820 if (i != 2) queue_run_force = TRUE;
2821 if (i >= 2) deliver_selectstring_regex = TRUE;
2822 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2823 argrest += Ustrlen(rsopts[i]);
2828 /* -R: Set string to match in addresses for forced queue run to
2829 pick out particular messages. */
2833 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2835 fprintf(stderr, "exim: string expected after -R\n");
2839 else deliver_selectstring = argrest;
2843 /* -r: an obsolete synonym for -f (see above) */
2846 /* -S: Like -R but works on sender. */
2848 case 'S': /* Synonymous with -qS... */
2849 receiving_message = FALSE;
2851 /* -Sf: As -S (below) but force all deliveries,
2852 -Sff: Ditto, but also thaw all frozen messages,
2853 -Sr: String is regex
2854 -Srf: Regex and force
2855 -Srff: Regex and force and thaw
2857 in all cases provided there are no further characters in this
2863 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2865 if (Ustrcmp(argrest, rsopts[i]) == 0)
2867 if (i != 2) queue_run_force = TRUE;
2868 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2869 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2870 argrest += Ustrlen(rsopts[i]);
2875 /* -S: Set string to match in addresses for forced queue run to
2876 pick out particular messages. */
2880 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2882 fprintf(stderr, "exim: string expected after -S\n");
2886 else deliver_selectstring_sender = argrest;
2889 /* -Tqt is an option that is exclusively for use by the testing suite.
2890 It is not recognized in other circumstances. It allows for the setting up
2891 of explicit "queue times" so that various warning/retry things can be
2892 tested. Otherwise variability of clock ticks etc. cause problems. */
2895 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2896 fudged_queue_times = argv[++i];
2901 /* -t: Set flag to extract recipients from body of message. */
2904 if (*argrest == 0) extract_recipients = TRUE;
2906 /* -ti: Set flag to extract recipients from body of message, and also
2907 specify that dot does not end the message. */
2909 else if (Ustrcmp(argrest, "i") == 0)
2911 extract_recipients = TRUE;
2915 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2918 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2925 /* -U: This means "initial user submission" in sendmail, apparently. The
2926 doc claims that in future sendmail may refuse syntactically invalid
2927 messages instead of fixing them. For the moment, we just ignore it. */
2933 /* -v: verify things - this is a very low-level debugging */
2938 debug_selector |= D_v;
2939 debug_file = stderr;
2945 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2947 The -x flag tells the sendmail command that mail from a local
2948 mail program has National Language Support (NLS) extended characters
2949 in the body of the mail item. The sendmail command can send mail with
2950 extended NLS characters across networks that normally corrupts these
2953 As Exim is 8-bit clean, it just ignores this flag. */
2956 if (*argrest != 0) badarg = TRUE;
2959 /* All other initial characters are errors */
2964 } /* End of high-level switch statement */
2966 /* Failed to recognize the option, or syntax error */
2970 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2971 "option %s\n", arg);
2977 /* If -R or -S have been specified without -q, assume a single queue run. */
2979 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2980 queue_interval < 0) queue_interval = 0;
2984 /* If usage_wanted is set we call the usage function - which never returns */
2985 if (usage_wanted) exim_usage(called_as);
2987 /* Arguments have been processed. Check for incompatibilities. */
2989 (smtp_input || extract_recipients || recipients_arg < argc) &&
2990 (daemon_listen || queue_interval >= 0 || bi_option ||
2991 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2992 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2995 msg_action_arg > 0 &&
2996 (daemon_listen || queue_interval >= 0 || list_options ||
2997 (checking && msg_action != MSG_LOAD) ||
2998 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3001 (daemon_listen || queue_interval >= 0) &&
3002 (sender_address != NULL || list_options || list_queue || checking ||
3006 daemon_listen && queue_interval == 0
3010 (checking || smtp_input || extract_recipients ||
3011 filter_test != FTEST_NONE || bi_option)
3014 verify_address_mode &&
3015 (address_test_mode || smtp_input || extract_recipients ||
3016 filter_test != FTEST_NONE || bi_option)
3019 address_test_mode && (smtp_input || extract_recipients ||
3020 filter_test != FTEST_NONE || bi_option)
3023 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3027 deliver_selectstring != NULL && queue_interval < 0
3030 msg_action == MSG_LOAD &&
3031 (!expansion_test || expansion_test_message != NULL)
3035 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3039 /* If debugging is set up, set the file and the file descriptor to pass on to
3040 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3041 to run in the foreground. */
3043 if (debug_selector != 0)
3045 debug_file = stderr;
3046 debug_fd = fileno(debug_file);
3047 background_daemon = FALSE;
3048 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3049 if (debug_selector != D_v) /* -v only doesn't show this */
3051 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3052 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3054 show_whats_supported(stderr);
3058 /* When started with root privilege, ensure that the limits on the number of
3059 open files and the number of processes (where that is accessible) are
3060 sufficiently large, or are unset, in case Exim has been called from an
3061 environment where the limits are screwed down. Not all OS have the ability to
3062 change some of these limits. */
3066 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3072 #ifdef RLIMIT_NOFILE
3073 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3075 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3077 rlp.rlim_cur = rlp.rlim_max = 0;
3080 /* I originally chose 1000 as a nice big number that was unlikely to
3081 be exceeded. It turns out that some older OS have a fixed upper limit of
3084 if (rlp.rlim_cur < 1000)
3086 rlp.rlim_cur = rlp.rlim_max = 1000;
3087 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3089 rlp.rlim_cur = rlp.rlim_max = 256;
3090 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3091 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3098 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3100 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3102 rlp.rlim_cur = rlp.rlim_max = 0;
3105 #ifdef RLIM_INFINITY
3106 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3108 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3110 if (rlp.rlim_cur < 1000)
3112 rlp.rlim_cur = rlp.rlim_max = 1000;
3114 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3115 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3121 /* Exim is normally entered as root (but some special configurations are
3122 possible that don't do this). However, it always spins off sub-processes that
3123 set their uid and gid as required for local delivery. We don't want to pass on
3124 any extra groups that root may belong to, so we want to get rid of them all at
3127 We need to obey setgroups() at this stage, before possibly giving up root
3128 privilege for a changed configuration file, but later on we might need to
3129 check on the additional groups for the admin user privilege - can't do that
3130 till after reading the config, which might specify the exim gid. Therefore,
3131 save the group list here first. */
3133 group_count = getgroups(NGROUPS_MAX, group_list);
3135 /* There is a fundamental difference in some BSD systems in the matter of
3136 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3137 known not to be different. On the "different" systems there is a single group
3138 list, and the first entry in it is the current group. On all other versions of
3139 Unix there is a supplementary group list, which is in *addition* to the current
3140 group. Consequently, to get rid of all extraneous groups on a "standard" system
3141 you pass over 0 groups to setgroups(), while on a "different" system you pass
3142 over a single group - the current group, which is always the first group in the
3143 list. Calling setgroups() with zero groups on a "different" system results in
3144 an error return. The following code should cope with both types of system.
3146 However, if this process isn't running as root, setgroups() can't be used
3147 since you have to be root to run it, even if throwing away groups. Not being
3148 root here happens only in some unusual configurations. We just ignore the
3151 if (setgroups(0, NULL) != 0)
3153 if (setgroups(1, group_list) != 0 && !unprivileged)
3155 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3160 /* If the configuration file name has been altered by an argument on the
3161 command line (either a new file name or a macro definition) and the caller is
3162 not root or the exim user, or if this is a filter testing run, remove any
3163 setuid privilege the program has, and run as the underlying user.
3165 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3166 severely restricts the use of -C for some purposes.
3168 Otherwise, set the real ids to the effective values (should be root unless run
3169 from inetd, which it can either be root or the exim uid, if one is configured).
3171 There is a private mechanism for bypassing some of this, in order to make it
3172 possible to test lots of configurations automatically, without having either to
3173 recompile each time, or to patch in an actual configuration file name and other
3174 values (such as the path name). If running in the test harness, pretend that
3175 configuration file changes and macro definitions haven't happened. */
3178 (config_changed || macros != NULL) && /* Config changed, and */
3179 real_uid != root_uid && /* Not root, and */
3180 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3181 real_uid != exim_uid && /* Not exim, and */
3183 !running_in_test_harness /* Not fudged */
3185 expansion_test /* expansion testing */
3187 filter_test != FTEST_NONE) /* Filter testing */
3189 setgroups(group_count, group_list);
3190 exim_setugid(real_uid, real_gid, FALSE,
3191 US"-C, -D, -be or -bf forces real uid");
3192 removed_privilege = TRUE;
3194 /* In the normal case when Exim is called like this, stderr is available
3195 and should be used for any logging information because attempts to write
3196 to the log will usually fail. To arrange this, we unset really_exim. However,
3197 if no stderr is available there is no point - we might as well have a go
3198 at the log (if it fails, syslog will be written). */
3200 if (log_stderr != NULL) really_exim = FALSE;
3203 /* Privilege is to be retained for the moment. It may be dropped later,
3204 depending on the job that this Exim process has been asked to do. For now, set
3205 the real uid to the effective so that subsequent re-execs of Exim are done by a
3208 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3210 /* If testing a filter, open the file(s) now, before wasting time doing other
3211 setups and reading the message. */
3213 if ((filter_test & FTEST_SYSTEM) != 0)
3215 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3218 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3220 return EXIT_FAILURE;
3224 if ((filter_test & FTEST_USER) != 0)
3226 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3229 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3231 return EXIT_FAILURE;
3235 /* Read the main runtime configuration data; this gives up if there
3236 is a failure. It leaves the configuration file open so that the subsequent
3237 configuration data for delivery can be read if needed. */
3241 /* Handle the decoding of logging options. */
3243 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3244 log_options, log_options_count, US"log");
3248 debug_printf("configuration file is %s\n", config_main_filename);
3249 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3250 log_extra_selector);
3253 /* If domain literals are not allowed, check the sender address that was
3254 supplied with -f. Ditto for a stripped trailing dot. */
3256 if (sender_address != NULL)
3258 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3260 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3261 "allowed\n", sender_address);
3262 return EXIT_FAILURE;
3264 if (f_end_dot && !strip_trailing_dot)
3266 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3267 "(trailing dot not allowed)\n", sender_address);
3268 return EXIT_FAILURE;
3272 /* Paranoia check of maximum lengths of certain strings. There is a check
3273 on the length of the log file path in log.c, which will come into effect
3274 if there are any calls to write the log earlier than this. However, if we
3275 get this far but the string is very long, it is better to stop now than to
3276 carry on and (e.g.) receive a message and then have to collapse. The call to
3277 log_write() from here will cause the ultimate panic collapse if the complete
3278 file name exceeds the buffer length. */
3280 if (Ustrlen(log_file_path) > 200)
3281 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3282 "log_file_path is longer than 200 chars: aborting");
3284 if (Ustrlen(pid_file_path) > 200)
3285 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3286 "pid_file_path is longer than 200 chars: aborting");
3288 if (Ustrlen(spool_directory) > 200)
3289 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3290 "spool_directory is longer than 200 chars: aborting");
3292 /* Length check on the process name given to syslog for its TAG field,
3293 which is only permitted to be 32 characters or less. See RFC 3164. */
3295 if (Ustrlen(syslog_processname) > 32)
3296 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3297 "syslog_processname is longer than 32 chars: aborting");
3299 /* In some operating systems, the environment variable TMPDIR controls where
3300 temporary files are created; Exim doesn't use these (apart from when delivering
3301 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3302 If TMPDIR is found in the environment, reset it to the value defined in the
3303 TMPDIR macro, if this macro is defined. */
3308 for (p = USS environ; *p != NULL; p++)
3310 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3311 Ustrcmp(*p+7, TMPDIR) != 0)
3313 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3314 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3316 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3322 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3323 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3324 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3325 called by a user who has set the TZ variable. This then affects the timestamps
3326 in log files and in Received: headers, and any created Date: header lines. The
3327 required timezone is settable in the configuration file, so nothing can be done
3328 about this earlier - but hopefully nothing will normally be logged earlier than
3329 this. We have to make a new environment if TZ is wrong, but don't bother if
3330 timestamps_utc is set, because then all times are in UTC anyway. */
3332 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3334 timestamps_utc = TRUE;
3338 uschar *envtz = US getenv("TZ");
3339 if ((envtz == NULL && timezone_string != NULL) ||
3341 (timezone_string == NULL ||
3342 Ustrcmp(timezone_string, envtz) != 0)))
3344 uschar **p = USS environ;
3348 while (*p++ != NULL) count++;
3349 if (envtz == NULL) count++;
3350 newp = new = malloc(sizeof(uschar *) * (count + 1));
3351 for (p = USS environ; *p != NULL; p++)
3353 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3356 if (timezone_string != NULL)
3358 *newp = malloc(Ustrlen(timezone_string) + 4);
3359 sprintf(CS *newp++, "TZ=%s", timezone_string);
3364 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3365 tod_stamp(tod_log));
3369 /* Handle the case when we have removed the setuid privilege because of -C or
3370 -D. This means that the caller of Exim was not root, and, provided that
3371 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3374 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3375 were running as the exim user defined in the configuration file (different to
3376 the one in the binary). The sysadmin may expect this case to retain privilege
3377 because "the binary was called by the Exim user", but it hasn't, because of the
3378 order in which it handles this stuff. There are two possibilities:
3380 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3381 to do message deliveries. Thus, the fact that it is running as a
3382 non-privileged user is plausible, and might be wanted in some special
3383 configurations. However, really_exim will have been set false when
3384 privilege was dropped, to stop Exim trying to write to its normal log
3385 files. Therefore, re-enable normal log processing, assuming the sysadmin
3386 has set up the log directory correctly.
3388 (2) If deliver_drop_privilege is not set, the configuration won't work as
3389 apparently intended, and so we log a panic message. In order to retain
3390 root for -C or -D, the caller must either be root or the Exim user
3391 defined in the binary (when deliver_drop_ privilege is false).
3393 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3394 built-in exim user or one defined in the configuration. In either event,
3395 re-enable log processing, assuming the sysadmin knows what they are doing. */
3397 if (removed_privilege && (config_changed || macros != NULL) &&
3398 real_uid == exim_uid)
3400 #ifdef ALT_CONFIG_ROOT_ONLY
3401 really_exim = TRUE; /* let logging work normally */
3404 if (deliver_drop_privilege)
3405 really_exim = TRUE; /* let logging work normally */
3407 log_write(0, LOG_MAIN|LOG_PANIC,
3408 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3409 (int)exim_uid, config_changed? "-C" : "-D");
3413 /* Start up Perl interpreter if Perl support is configured and there is a
3414 perl_startup option, and the configuration or the command line specifies
3415 initializing starting. Note that the global variables are actually called
3416 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3419 if (perl_start_option != 0)
3420 opt_perl_at_start = (perl_start_option > 0);
3421 if (opt_perl_at_start && opt_perl_startup != NULL)
3424 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3425 errstr = init_perl(opt_perl_startup);
3428 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3429 return EXIT_FAILURE;
3431 opt_perl_started = TRUE;
3433 #endif /* EXIM_PERL */
3435 /* Log the arguments of the call if the configuration file said so. This is
3436 a debugging feature for finding out what arguments certain MUAs actually use.
3437 Don't attempt it if logging is disabled, or if listing variables or if
3438 verifying/testing addresses or expansions. */
3440 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3441 && really_exim && !list_options && !checking)
3444 uschar *p = big_buffer;
3446 (void)getcwd(CS p+4, big_buffer_size - 4);
3448 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3450 for (i = 0; i < argc; i++)
3452 int len = Ustrlen(argv[i]);
3455 if (p + len + 8 >= big_buffer + big_buffer_size)
3458 log_write(0, LOG_MAIN, "%s", big_buffer);
3459 Ustrcpy(big_buffer, "...");
3462 printing = string_printing(argv[i]);
3463 if (printing[0] == 0) quote = US"\""; else
3465 uschar *pp = printing;
3467 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3469 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3470 (p - big_buffer) - 4), printing, quote);
3474 if ((log_extra_selector & LX_arguments) != 0)
3475 log_write(0, LOG_MAIN, "%s", big_buffer);
3477 debug_printf("%s\n", big_buffer);
3480 /* Set the working directory to be the top-level spool directory. We don't rely
3481 on this in the code, which always uses fully qualified names, but it's useful
3482 for core dumps etc. Don't complain if it fails - the spool directory might not
3483 be generally accessible and calls with the -C option (and others) have lost
3484 privilege by now. Before the chdir, we try to ensure that the directory exists.
3487 if (Uchdir(spool_directory) != 0)
3489 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3490 (void)Uchdir(spool_directory);
3493 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3494 alias file. Exim doesn't have such a concept, but this call is screwed into
3495 Sun's YP makefiles. Handle this by calling a configured script, as the real
3496 user who called Exim. The -oA option can be used to pass an argument to the
3501 (void)fclose(config_file);
3502 if (bi_command != NULL)
3506 argv[i++] = bi_command;
3507 if (alias_arg != NULL) argv[i++] = alias_arg;
3510 setgroups(group_count, group_list);
3511 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3513 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3514 (argv[1] == NULL)? US"" : argv[1]);
3516 execv(CS argv[0], (char *const *)argv);
3517 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3522 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3527 /* If an action on specific messages is requested, or if a daemon or queue
3528 runner is being started, we need to know if Exim was called by an admin user.
3529 This is the case if the real user is root or exim, or if the real group is
3530 exim, or if one of the supplementary groups is exim or a group listed in
3531 admin_groups. We don't fail all message actions immediately if not admin_user,
3532 since some actions can be performed by non-admin users. Instead, set admin_user
3533 for later interrogation. */
3535 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3540 for (i = 0; i < group_count; i++)
3542 if (group_list[i] == exim_gid) admin_user = TRUE;
3543 else if (admin_groups != NULL)
3545 for (j = 1; j <= (int)(admin_groups[0]); j++)
3546 if (admin_groups[j] == group_list[i])
3547 { admin_user = TRUE; break; }
3549 if (admin_user) break;
3553 /* Another group of privileged users are the trusted users. These are root,
3554 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3555 are permitted to specify sender_addresses with -f on the command line, and
3556 other message parameters as well. */
3558 if (real_uid == root_uid || real_uid == exim_uid)
3559 trusted_caller = TRUE;
3564 if (trusted_users != NULL)
3566 for (i = 1; i <= (int)(trusted_users[0]); i++)
3567 if (trusted_users[i] == real_uid)
3568 { trusted_caller = TRUE; break; }
3571 if (!trusted_caller && trusted_groups != NULL)
3573 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3575 if (trusted_groups[i] == real_gid)
3576 trusted_caller = TRUE;
3577 else for (j = 0; j < group_count; j++)
3579 if (trusted_groups[i] == group_list[j])
3580 { trusted_caller = TRUE; break; }
3582 if (trusted_caller) break;
3587 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3588 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3590 /* Only an admin user may start the daemon or force a queue run in the default
3591 configuration, but the queue run restriction can be relaxed. Only an admin
3592 user may request that a message be returned to its sender forthwith. Only an
3593 admin user may specify a debug level greater than D_v (because it might show
3594 passwords, etc. in lookup queries). Only an admin user may request a queue
3599 BOOL debugset = (debug_selector & ~D_v) != 0;
3600 if (deliver_give_up || daemon_listen ||
3601 (count_queue && queue_list_requires_admin) ||
3602 (list_queue && queue_list_requires_admin) ||
3603 (queue_interval >= 0 && prod_requires_admin) ||
3604 (debugset && !running_in_test_harness))
3606 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3611 /* If the real user is not root or the exim uid, the argument for passing
3612 in an open TCP/IP connection for another message is not permitted, nor is
3613 running with the -N option for any delivery action, unless this call to exim is
3614 one that supplied an input message, or we are using a patched exim for
3615 regression testing. */
3617 if (real_uid != root_uid && real_uid != exim_uid &&
3618 (continue_hostname != NULL ||
3620 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3621 )) && !running_in_test_harness)
3623 fprintf(stderr, "exim: Permission denied\n");
3624 return EXIT_FAILURE;
3627 /* If the caller is not trusted, certain arguments are ignored when running for
3628 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3629 Note that authority for performing certain actions on messages is tested in the
3630 queue_action() function. */
3632 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3634 sender_host_name = sender_host_address = interface_address =
3635 sender_ident = received_protocol = NULL;
3636 sender_host_port = interface_port = 0;
3637 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3640 /* If a sender host address is set, extract the optional port number off the
3641 end of it and check its syntax. Do the same thing for the interface address.
3642 Exim exits if the syntax is bad. */
3646 if (sender_host_address != NULL)
3647 sender_host_port = check_port(sender_host_address);
3648 if (interface_address != NULL)
3649 interface_port = check_port(interface_address);
3652 /* If an SMTP message is being received check to see if the standard input is a
3653 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3654 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3659 union sockaddr_46 inetd_sock;
3660 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3661 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3663 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3664 if (family == AF_INET || family == AF_INET6)
3666 union sockaddr_46 interface_sock;
3667 size = sizeof(interface_sock);
3669 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3670 interface_address = host_ntoa(-1, &interface_sock, NULL,
3673 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3675 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3678 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3679 NULL, &sender_host_port);
3680 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3681 "inetd is not supported when mua_wrapper is set");
3686 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3687 return EXIT_FAILURE;
3693 /* If the load average is going to be needed while receiving a message, get it
3694 now for those OS that require the first call to os_getloadavg() to be done as
3695 root. There will be further calls later for each message received. */
3697 #ifdef LOAD_AVG_NEEDS_ROOT
3698 if (receiving_message &&
3699 (queue_only_load >= 0 ||
3700 (is_inetd && smtp_load_reserve >= 0)
3703 load_average = OS_GETLOADAVG();
3707 /* The queue_only configuration option can be overridden by -odx on the command
3708 line, except that if queue_only_override is false, queue_only cannot be unset
3709 from the command line. */
3711 if (queue_only_set && (queue_only_override || arg_queue_only))
3712 queue_only = arg_queue_only;
3714 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3717 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3718 if (arg_smtp_receive_timeout >= 0)
3719 smtp_receive_timeout = arg_smtp_receive_timeout;
3721 /* If Exim was started with root privilege, unless we have already removed the
3722 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3723 except when starting the daemon or doing some kind of delivery or address
3724 testing (-bt). These are the only cases when root need to be retained. We run
3725 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3726 retained only for starting the daemon. We always do the initgroups() in this
3727 situation (controlled by the TRUE below), in order to be as close as possible
3728 to the state Exim usually runs in. */
3730 if (!unprivileged && /* originally had root AND */
3731 !removed_privilege && /* still got root AND */
3732 !daemon_listen && /* not starting the daemon */
3733 queue_interval <= 0 && /* (either kind of daemon) */
3735 deliver_drop_privilege || /* requested unprivileged */
3737 queue_interval < 0 && /* not running the queue */
3738 (msg_action_arg < 0 || /* and */
3739 msg_action != MSG_DELIVER) && /* not delivering and */
3740 (!checking || !address_test_mode) /* not address checking */
3744 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3747 /* When we are retaining a privileged uid, we still change to the exim gid. */
3749 else setgid(exim_gid);
3751 /* Handle a request to list the delivery queue */
3755 set_process_info("listing the queue");
3756 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3760 /* Handle a request to count the delivery queue */
3764 set_process_info("counting the queue");
3769 /* Handle actions on specific messages, except for the force delivery and
3770 message load actions, which are done below. Some actions take a whole list of
3771 message ids, which are known to continue up to the end of the arguments. Others
3772 take a single message id and then operate on the recipients list. */
3774 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3776 int yield = EXIT_SUCCESS;
3777 set_process_info("acting on specified messages");
3779 if (!one_msg_action)
3781 for (i = msg_action_arg; i < argc; i++)
3782 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3783 yield = EXIT_FAILURE;
3786 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3787 recipients_arg)) yield = EXIT_FAILURE;
3791 /* All the modes below here require the remaining configuration sections
3792 to be read, except that we can skip over the ACL setting when delivering
3793 specific messages, or doing a queue run. (For various testing cases we could
3794 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3797 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3799 /* The configuration data will have been read into POOL_PERM because we won't
3800 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3801 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3802 configuration were read into POOL_MAIN, because we don't do any resets till
3803 later on. However, it seems right, and it does ensure that both pools get used.
3806 store_pool = POOL_MAIN;
3808 /* Handle the -brt option. This is for checking out retry configurations.
3809 The next three arguments are a domain name or a complete address, and
3810 optionally two error numbers. All it does is to call the function that
3811 scans the retry configuration data. */
3813 if (test_retry_arg >= 0)
3815 retry_config *yield;
3816 int basic_errno = 0;
3820 if (test_retry_arg >= argc)
3822 printf("-brt needs a domain or address argument\n");
3823 exim_exit(EXIT_FAILURE);
3825 s1 = argv[test_retry_arg++];
3828 /* If the first argument contains no @ and no . it might be a local user
3829 or it might be a single-component name. Treat as a domain. */
3831 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3833 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3834 "being \ntreated as a one-component domain, not as a local part.\n\n",
3838 /* There may be an optional second domain arg. */
3840 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3841 s2 = argv[test_retry_arg++];
3843 /* The final arg is an error name */
3845 if (test_retry_arg < argc)
3847 uschar *ss = argv[test_retry_arg];
3849 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3852 printf("%s\n", CS error);
3853 return EXIT_FAILURE;
3856 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3857 code > 100 as an error is for matching codes to the decade. Turn them into
3858 a real error code, off the decade. */
3860 if (basic_errno == ERRNO_MAIL4XX ||
3861 basic_errno == ERRNO_RCPT4XX ||
3862 basic_errno == ERRNO_DATA4XX)
3864 int code = (more_errno >> 8) & 255;
3866 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3867 else if (code > 100)
3868 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3872 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3873 if (yield == NULL) printf("No retry information found\n"); else
3876 more_errno = yield->more_errno;
3877 printf("Retry rule: %s ", yield->pattern);
3879 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3881 printf("quota%s%s ",
3882 (more_errno > 0)? "_" : "",
3883 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3885 else if (yield->basic_errno == ECONNREFUSED)
3887 printf("refused%s%s ",
3888 (more_errno > 0)? "_" : "",
3889 (more_errno == 'M')? "MX" :
3890 (more_errno == 'A')? "A" : "");
3892 else if (yield->basic_errno == ETIMEDOUT)
3895 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3897 if (more_errno != 0) printf("_%s",
3898 (more_errno == 'M')? "MX" : "A");
3901 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3902 printf("auth_failed ");
3905 for (r = yield->rules; r != NULL; r = r->next)
3907 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3908 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3914 printf(",%d.", x/1000);
3928 exim_exit(EXIT_SUCCESS);
3931 /* Handle a request to list one or more configuration options */
3935 set_process_info("listing variables");
3936 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3937 else for (i = recipients_arg; i < argc; i++)
3940 (Ustrcmp(argv[i], "router") == 0 ||
3941 Ustrcmp(argv[i], "transport") == 0 ||
3942 Ustrcmp(argv[i], "authenticator") == 0 ||
3943 Ustrcmp(argv[i], "macro") == 0))
3945 readconf_print(argv[i+1], argv[i]);
3948 else readconf_print(argv[i], NULL);
3950 exim_exit(EXIT_SUCCESS);
3954 /* Handle a request to deliver one or more messages that are already on the
3955 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3956 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3958 Delivery of specific messages is typically used for a small number when
3959 prodding by hand (when the option forced_delivery will be set) or when
3960 re-execing to regain root privilege. Each message delivery must happen in a
3961 separate process, so we fork a process for each one, and run them sequentially
3962 so that debugging output doesn't get intertwined, and to avoid spawning too
3963 many processes if a long list is given. However, don't fork for the last one;
3964 this saves a process in the common case when Exim is called to deliver just one
3967 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
3969 if (prod_requires_admin && !admin_user)
3971 fprintf(stderr, "exim: Permission denied\n");
3972 exim_exit(EXIT_FAILURE);
3974 set_process_info("delivering specified messages");
3975 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3976 for (i = msg_action_arg; i < argc; i++)
3981 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3982 else if ((pid = fork()) == 0)
3984 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3985 _exit(EXIT_SUCCESS);
3989 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3991 exim_exit(EXIT_FAILURE);
3995 exim_exit(EXIT_SUCCESS);
3999 /* If only a single queue run is requested, without SMTP listening, we can just
4000 turn into a queue runner, with an optional starting message id. */
4002 if (queue_interval == 0 && !daemon_listen)
4004 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4005 (start_queue_run_id == NULL)? US"" : US" starting at ",
4006 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4007 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4008 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4009 set_process_info("running the queue (single queue run)");
4010 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4011 exim_exit(EXIT_SUCCESS);
4015 /* Find the login name of the real user running this process. This is always
4016 needed when receiving a message, because it is written into the spool file. It
4017 may also be used to construct a from: or a sender: header, and in this case we
4018 need the user's full name as well, so save a copy of it, checked for RFC822
4019 syntax and munged if necessary, if it hasn't previously been set by the -F
4020 argument. We may try to get the passwd entry more than once, in case NIS or
4021 other delays are in evidence. Save the home directory for use in filter testing
4026 if ((pw = getpwuid(real_uid)) != NULL)
4028 originator_login = string_copy(US pw->pw_name);
4029 originator_home = string_copy(US pw->pw_dir);
4031 /* If user name has not been set by -F, set it from the passwd entry
4032 unless -f has been used to set the sender address by a trusted user. */
4034 if (originator_name == NULL)
4036 if (sender_address == NULL ||
4037 (!trusted_caller && filter_test == FTEST_NONE))
4039 uschar *name = US pw->pw_gecos;
4040 uschar *amp = Ustrchr(name, '&');
4043 /* Most Unix specify that a '&' character in the gecos field is
4044 replaced by a copy of the login name, and some even specify that
4045 the first character should be upper cased, so that's what we do. */
4050 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4051 amp - name, name, &loffset, originator_login, amp + 1);
4052 buffer[loffset] = toupper(buffer[loffset]);
4056 /* If a pattern for matching the gecos field was supplied, apply
4057 it and then expand the name string. */
4059 if (gecos_pattern != NULL && gecos_name != NULL)
4062 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4064 if (regex_match_and_setup(re, name, 0, -1))
4066 uschar *new_name = expand_string(gecos_name);
4068 if (new_name != NULL)
4070 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4071 "gecos field \"%s\"\n", new_name, name);
4074 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4075 "\"%s\": %s\n", gecos_name, expand_string_message);
4077 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4078 "gecos field \"%s\"\n", gecos_pattern, name);
4079 store_free((void *)re);
4081 originator_name = string_copy(name);
4084 /* A trusted caller has used -f but not -F */
4086 else originator_name = US"";
4089 /* Break the retry loop */
4094 if (++i > finduser_retries) break;
4098 /* If we cannot get a user login, log the incident and give up, unless the
4099 configuration specifies something to use. When running in the test harness,
4100 any setting of unknown_login overrides the actual name. */
4102 if (originator_login == NULL || running_in_test_harness)
4104 if (unknown_login != NULL)
4106 originator_login = expand_string(unknown_login);
4107 if (originator_name == NULL && unknown_username != NULL)
4108 originator_name = expand_string(unknown_username);
4109 if (originator_name == NULL) originator_name = US"";
4111 if (originator_login == NULL)
4112 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4116 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4119 originator_name = string_copy(parse_fix_phrase(originator_name,
4120 Ustrlen(originator_name), big_buffer, big_buffer_size));
4122 /* If a message is created by this call of Exim, the uid/gid of its originator
4123 are those of the caller. These values are overridden if an existing message is
4124 read in from the spool. */
4126 originator_uid = real_uid;
4127 originator_gid = real_gid;
4129 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4130 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4132 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4133 returns. We leave this till here so that the originator_ fields are available
4134 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4137 if (daemon_listen || queue_interval > 0)
4141 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4142 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4143 "mua_wrapper is set");
4148 /* If the sender ident has not been set (by a trusted caller) set it to
4149 the caller. This will get overwritten below for an inetd call. If a trusted
4150 caller has set it empty, unset it. */
4152 if (sender_ident == NULL) sender_ident = originator_login;
4153 else if (sender_ident[0] == 0) sender_ident = NULL;
4155 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4156 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4157 originator_* variables set. */
4159 if (test_rewrite_arg >= 0)
4161 really_exim = FALSE;
4162 if (test_rewrite_arg >= argc)
4164 printf("-brw needs an address argument\n");
4165 exim_exit(EXIT_FAILURE);
4167 rewrite_test(argv[test_rewrite_arg]);
4168 exim_exit(EXIT_SUCCESS);
4171 /* A locally-supplied message is considered to be coming from a local user
4172 unless a trusted caller supplies a sender address with -f, or is passing in the
4173 message via SMTP (inetd invocation or otherwise). */
4175 if ((sender_address == NULL && !smtp_input) ||
4176 (!trusted_caller && filter_test == FTEST_NONE))
4178 sender_local = TRUE;
4180 /* A trusted caller can supply authenticated_sender and authenticated_id
4181 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4182 defaults except when host checking. */
4184 if (authenticated_sender == NULL && !host_checking)
4185 authenticated_sender = string_sprintf("%s@%s", originator_login,
4186 qualify_domain_sender);
4187 if (authenticated_id == NULL && !host_checking)
4188 authenticated_id = originator_login;
4191 /* Trusted callers are always permitted to specify the sender address.
4192 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4193 is specified is the empty address. However, if a trusted caller does not
4194 specify a sender address for SMTP input, we leave sender_address unset. This
4195 causes the MAIL commands to be honoured. */
4197 if ((!smtp_input && sender_address == NULL) ||
4198 !receive_check_set_sender(sender_address))
4200 /* Either the caller is not permitted to set a general sender, or this is
4201 non-SMTP input and the trusted caller has not set a sender. If there is no
4202 sender, or if a sender other than <> is set, override with the originator's
4203 login (which will get qualified below), except when checking things. */
4205 if (sender_address == NULL /* No sender_address set */
4207 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4208 !checking && /* Not running tests, AND */
4209 filter_test == FTEST_NONE)) /* Not testing a filter */
4211 sender_address = originator_login;
4212 sender_address_forced = FALSE;
4213 sender_address_domain = 0;
4217 /* Remember whether an untrusted caller set the sender address */
4219 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4221 /* Ensure that the sender address is fully qualified unless it is the empty
4222 address, which indicates an error message, or doesn't exist (root caller, smtp
4223 interface, no -f argument). */
4225 if (sender_address != NULL && sender_address[0] != 0 &&
4226 sender_address_domain == 0)
4227 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4228 qualify_domain_sender);
4230 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4232 /* Handle a request to verify a list of addresses, or test them for delivery.
4233 This must follow the setting of the sender address, since routers can be
4234 predicated upon the sender. If no arguments are given, read addresses from
4235 stdin. Set debug_level to at least D_v to get full output for address testing.
4238 if (verify_address_mode || address_test_mode)
4241 int flags = vopt_qualify;
4243 if (verify_address_mode)
4245 if (!verify_as_sender) flags |= vopt_is_recipient;
4246 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4251 flags |= vopt_is_recipient;
4252 debug_selector |= D_v;
4253 debug_file = stderr;
4254 debug_fd = fileno(debug_file);
4255 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4258 if (recipients_arg < argc)
4260 while (recipients_arg < argc)
4262 uschar *s = argv[recipients_arg++];
4265 BOOL finished = FALSE;
4266 uschar *ss = parse_find_address_end(s, FALSE);
4267 if (*ss == ',') *ss = 0; else finished = TRUE;
4268 test_address(s, flags, &exit_value);
4271 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4278 uschar *s = get_stdinput(NULL, NULL);
4279 if (s == NULL) break;
4280 test_address(s, flags, &exit_value);
4284 exim_exit(exit_value);
4287 /* Handle expansion checking. Either expand items on the command line, or read
4288 from stdin if there aren't any. If -Mset was specified, load the message so
4289 that its variables can be used, but restrict this facility to admin users.
4290 Otherwise, if -bem was used, read a message from stdin. */
4294 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4296 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4299 fprintf(stderr, "exim: permission denied\n");
4302 message_id = argv[msg_action_arg];
4303 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4304 if (!spool_open_datafile(message_id))
4305 printf ("Failed to load message datafile %s\n", message_id);
4306 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4307 printf ("Failed to load message %s\n", message_id);
4310 /* Read a test message from a file. We fudge it up to be on stdin, saving
4311 stdin itself for later reading of expansion strings. */
4313 else if (expansion_test_message != NULL)
4315 int save_stdin = dup(0);
4316 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4319 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4321 return EXIT_FAILURE;
4324 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4325 message_ended = END_NOTENDED;
4326 read_message_body(receive_msg(extract_recipients));
4327 message_linecount += body_linecount;
4328 (void)dup2(save_stdin, 0);
4329 (void)close(save_stdin);
4330 clearerr(stdin); /* Required by Darwin */
4333 /* Allow $recipients for this testing */
4335 enable_dollar_recipients = TRUE;
4337 /* Expand command line items */
4339 if (recipients_arg < argc)
4341 while (recipients_arg < argc)
4343 uschar *s = argv[recipients_arg++];
4344 uschar *ss = expand_string(s);
4345 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4346 else printf("%s\n", CS ss);
4354 char *(*fn_readline)(char *) = NULL;
4355 char *(*fn_addhist)(char *) = NULL;
4358 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4364 uschar *source = get_stdinput(fn_readline, fn_addhist);
4365 if (source == NULL) break;
4366 ss = expand_string(source);
4368 printf ("Failed: %s\n", expand_string_message);
4369 else printf("%s\n", CS ss);
4373 if (dlhandle != NULL) dlclose(dlhandle);
4377 /* The data file will be open after -Mset */
4379 if (deliver_datafile >= 0)
4381 (void)close(deliver_datafile);
4382 deliver_datafile = -1;
4385 exim_exit(EXIT_SUCCESS);
4389 /* The active host name is normally the primary host name, but it can be varied
4390 for hosts that want to play several parts at once. We need to ensure that it is
4391 set for host checking, and for receiving messages. */
4393 smtp_active_hostname = primary_hostname;
4394 if (raw_active_hostname != NULL)
4396 uschar *nah = expand_string(raw_active_hostname);
4399 if (!expand_string_forcedfail)
4400 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4401 "(smtp_active_hostname): %s", raw_active_hostname,
4402 expand_string_message);
4404 else if (nah[0] != 0) smtp_active_hostname = nah;
4407 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4408 given IP address so that the blocking and relay configuration can be tested.
4409 Unless a sender_ident was set by -oMt, we discard it (the default is the
4410 caller's login name). An RFC 1413 call is made only if we are running in the
4411 test harness and an incoming interface and both ports are specified, because
4412 there is no TCP/IP call to find the ident for. */
4419 if (!sender_ident_set)
4421 sender_ident = NULL;
4422 if (running_in_test_harness && sender_host_port != 0 &&
4423 interface_address != NULL && interface_port != 0)
4424 verify_get_ident(1413);
4427 /* In case the given address is a non-canonical IPv6 address, canonicize
4428 it. The code works for both IPv4 and IPv6, as it happens. */
4430 size = host_aton(sender_host_address, x);
4431 sender_host_address = store_get(48); /* large enough for full IPv6 */
4432 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4434 /* Now set up for testing */
4436 host_build_sender_fullhost();
4440 sender_local = FALSE;
4441 sender_host_notsocket = TRUE;
4442 debug_file = stderr;
4443 debug_fd = fileno(debug_file);
4444 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4445 "**** but without any ident (RFC 1413) callback.\n"
4446 "**** This is not for real!\n\n",
4447 sender_host_address);
4449 if (verify_check_host(&hosts_connection_nolog) == OK)
4450 log_write_selector &= ~L_smtp_connection;
4451 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4453 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4454 because a log line has already been written for all its failure exists
4455 (usually "connection refused: <reason>") and writing another one is
4456 unnecessary clutter. */
4458 if (smtp_start_session())
4460 reset_point = store_get(0);
4463 store_reset(reset_point);
4464 if (smtp_setup_msg() <= 0) break;
4465 if (!receive_msg(FALSE)) break;
4469 exim_exit(EXIT_SUCCESS);
4473 /* Arrange for message reception if recipients or SMTP were specified;
4474 otherwise complain unless a version print (-bV) happened or this is a filter
4475 verification test. In the former case, show the configuration file name. */
4477 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4479 if (version_printed)
4481 printf("Configuration file is %s\n", config_main_filename);
4482 return EXIT_SUCCESS;
4485 if (filter_test == FTEST_NONE)
4486 exim_usage(called_as);
4490 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4491 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4492 that we are not called from inetd, because that is rejected above. The
4493 following configuration settings are forced here:
4495 (1) Synchronous delivery (-odi)
4496 (2) Errors to stderr (-oep == -oeq)
4497 (3) No parallel remote delivery
4498 (4) Unprivileged delivery
4500 We don't force overall queueing options because there are several of them;
4501 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4502 to override any SMTP queueing. */
4506 synchronous_delivery = TRUE;
4507 arg_error_handling = ERRORS_STDERR;
4508 remote_max_parallel = 1;
4509 deliver_drop_privilege = TRUE;
4511 queue_smtp_domains = NULL;
4515 /* Prepare to accept one or more new messages on the standard input. When a
4516 message has been read, its id is returned in message_id[]. If doing immediate
4517 delivery, we fork a delivery process for each received message, except for the
4518 last one, where we can save a process switch.
4520 It is only in non-smtp mode that error_handling is allowed to be changed from
4521 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4522 sendmail error modes other than -oem ever actually used? Later: yes.) */
4524 if (!smtp_input) error_handling = arg_error_handling;
4526 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4527 logging being sent down the socket and make an identd call to get the
4532 (void)fclose(stderr);
4533 exim_nullstd(); /* Re-open to /dev/null */
4534 verify_get_ident(IDENT_PORT);
4535 host_build_sender_fullhost();
4536 set_process_info("handling incoming connection from %s via inetd",
4540 /* If the sender host address has been set, build sender_fullhost if it hasn't
4541 already been done (which it will have been for inetd). This caters for the
4542 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4543 so that the test for IP options is skipped for -bs input. */
4545 if (sender_host_address != NULL && sender_fullhost == NULL)
4547 host_build_sender_fullhost();
4548 set_process_info("handling incoming connection from %s via -oMa",
4550 sender_host_notsocket = TRUE;
4553 /* Otherwise, set the sender host as unknown except for inetd calls. This
4554 prevents host checking in the case of -bs not from inetd and also for -bS. */
4556 else if (!is_inetd) sender_host_unknown = TRUE;
4558 /* If stdout does not exist, then dup stdin to stdout. This can happen
4559 if exim is started from inetd. In this case fd 0 will be set to the socket,
4560 but fd 1 will not be set. This also happens for passed SMTP channels. */
4562 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4564 /* Set up the incoming protocol name and the state of the program. Root is
4565 allowed to force received protocol via the -oMr option above. If we have come
4566 via inetd, the process info has already been set up. We don't set
4567 received_protocol here for smtp input, as it varies according to
4568 batch/HELO/EHLO/AUTH/TLS. */
4572 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4573 smtp_batched_input? "batched " : "",
4574 (sender_address!= NULL)? sender_address : originator_login);
4578 if (received_protocol == NULL)
4579 received_protocol = string_sprintf("local%s", called_as);
4580 set_process_info("accepting a local non-SMTP message from <%s>",
4584 /* Initialize the session_local_queue-only flag (this will be ignored if
4585 mua_wrapper is set) */
4588 session_local_queue_only = queue_only;
4590 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4591 the spool if so configured. On failure, we must not attempt to send an error
4592 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4593 error code is given.) */
4595 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4597 fprintf(stderr, "exim: insufficient disk space\n");
4598 return EXIT_FAILURE;
4601 /* If this is smtp input of any kind, real or batched, handle the start of the
4604 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4605 because a log line has already been written for all its failure exists
4606 (usually "connection refused: <reason>") and writing another one is
4607 unnecessary clutter. */
4613 if (verify_check_host(&hosts_connection_nolog) == OK)
4614 log_write_selector &= ~L_smtp_connection;
4615 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4616 if (!smtp_start_session())
4619 exim_exit(EXIT_SUCCESS);
4623 /* Otherwise, set up the input size limit here. */
4627 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4628 if (expand_string_message != NULL)
4630 if (thismessage_size_limit == -1)
4631 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4632 "message_size_limit: %s", expand_string_message);
4634 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4635 "message_size_limit: %s", expand_string_message);
4639 /* Loop for several messages when reading SMTP input. If we fork any child
4640 processes, we don't want to wait for them unless synchronous delivery is
4641 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4642 same as SIG_DFL, despite the fact that documentation often lists the default as
4643 "ignore". This is a confusing area. This is what I know:
4645 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4646 processes that complete simply to go away without ever becoming defunct. You
4647 can't then wait for them - but we don't want to wait for them in the
4648 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4649 happen for all OS (e.g. *BSD is different).
4651 But that's not the end of the story. Some (many? all?) systems have the
4652 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4653 has by default, so it seems that the difference is merely one of default
4654 (compare restarting vs non-restarting signals).
4656 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4657 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4658 of the loop below. Paranoia rules.
4660 February 2003: That's *still* not the end of the story. There are now versions
4661 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4662 process then calls waitpid(), a grumble is written to the system log, because
4663 this is logically inconsistent. In other words, it doesn't like the paranoia.
4664 As a consequenc of this, the waitpid() below is now excluded if we are sure
4665 that SIG_IGN works. */
4667 if (!synchronous_delivery)
4670 struct sigaction act;
4671 act.sa_handler = SIG_IGN;
4672 sigemptyset(&(act.sa_mask));
4673 act.sa_flags = SA_NOCLDWAIT;
4674 sigaction(SIGCHLD, &act, NULL);
4676 signal(SIGCHLD, SIG_IGN);
4680 /* Save the current store pool point, for resetting at the start of
4681 each message, and save the real sender address, if any. */
4683 reset_point = store_get(0);
4684 real_sender_address = sender_address;
4686 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4687 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4692 store_reset(reset_point);
4695 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4696 input and build the recipients list, before calling receive_msg() to read the
4697 message proper. Whatever sender address is given in the SMTP transaction is
4698 often ignored for local senders - we use the actual sender, which is normally
4699 either the underlying user running this process or a -f argument provided by
4700 a trusted caller. It is saved in real_sender_address. The test for whether to
4701 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4706 if ((rc = smtp_setup_msg()) > 0)
4708 if (real_sender_address != NULL &&
4709 !receive_check_set_sender(sender_address))
4711 sender_address = raw_sender = real_sender_address;
4712 sender_address_unrewritten = NULL;
4715 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4716 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4717 the very end. The result of the ACL is ignored (as for other non-SMTP
4718 messages). It is run for its potential side effects. */
4720 if (smtp_batched_input && acl_not_smtp_start != NULL)
4722 uschar *user_msg, *log_msg;
4723 enable_dollar_recipients = TRUE;
4724 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4725 &user_msg, &log_msg);
4726 enable_dollar_recipients = FALSE;
4729 /* Now get the data for the message */
4731 more = receive_msg(extract_recipients);
4732 if (message_id[0] == 0)
4735 smtp_log_no_mail(); /* Log no mail if configured */
4736 exim_exit(EXIT_FAILURE);
4741 smtp_log_no_mail(); /* Log no mail if configured */
4742 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4746 /* In the non-SMTP case, we have all the information from the command
4747 line, but must process it in case it is in the more general RFC822
4748 format, and in any case, to detect syntax errors. Also, it appears that
4749 the use of comma-separated lists as single arguments is common, so we
4750 had better support them. */
4756 int count = argc - recipients_arg;
4757 uschar **list = argv + recipients_arg;
4759 /* These options cannot be changed dynamically for non-SMTP messages */
4761 active_local_sender_retain = local_sender_retain;
4762 active_local_from_check = local_from_check;
4764 /* Save before any rewriting */
4766 raw_sender = string_copy(sender_address);
4768 /* Loop for each argument */
4770 for (i = 0; i < count; i++)
4772 int start, end, domain;
4774 uschar *s = list[i];
4776 /* Loop for each comma-separated address */
4780 BOOL finished = FALSE;
4782 uschar *ss = parse_find_address_end(s, FALSE);
4784 if (*ss == ',') *ss = 0; else finished = TRUE;
4786 /* Check max recipients - if -t was used, these aren't recipients */
4788 if (recipients_max > 0 && ++rcount > recipients_max &&
4789 !extract_recipients)
4791 if (error_handling == ERRORS_STDERR)
4793 fprintf(stderr, "exim: too many recipients\n");
4794 exim_exit(EXIT_FAILURE);
4799 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4800 errors_sender_rc : EXIT_FAILURE;
4805 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4807 if (domain == 0 && !allow_unqualified_recipient)
4810 errmess = US"unqualified recipient address not allowed";
4813 if (recipient == NULL)
4815 if (error_handling == ERRORS_STDERR)
4817 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4818 string_printing(list[i]), errmess);
4819 exim_exit(EXIT_FAILURE);
4825 eblock.text1 = string_printing(list[i]);
4826 eblock.text2 = errmess;
4828 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4829 errors_sender_rc : EXIT_FAILURE;
4833 receive_add_recipient(recipient, -1);
4836 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4840 /* Show the recipients when debugging */
4845 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4846 if (recipients_list != NULL)
4848 debug_printf("Recipients:\n");
4849 for (i = 0; i < recipients_count; i++)
4850 debug_printf(" %s\n", recipients_list[i].address);
4854 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4855 ignored; rejecting here would just add complication, and it can just as
4856 well be done later. Allow $recipients to be visible in the ACL. */
4858 if (acl_not_smtp_start != NULL)
4860 uschar *user_msg, *log_msg;
4861 enable_dollar_recipients = TRUE;
4862 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4863 &user_msg, &log_msg);
4864 enable_dollar_recipients = FALSE;
4867 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4868 will just read the headers for the message, and not write anything onto the
4871 message_ended = END_NOTENDED;
4872 more = receive_msg(extract_recipients);
4874 /* more is always FALSE here (not SMTP message) when reading a message
4875 for real; when reading the headers of a message for filter testing,
4876 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4878 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4879 } /* Non-SMTP message reception */
4881 /* If this is a filter testing run, there are headers in store, but
4882 no message on the spool. Run the filtering code in testing mode, setting
4883 the domain to the qualify domain and the local part to the current user,
4884 unless they have been set by options. The prefix and suffix are left unset
4885 unless specified. The the return path is set to to the sender unless it has
4886 already been set from a return-path header in the message. */
4888 if (filter_test != FTEST_NONE)
4890 deliver_domain = (ftest_domain != NULL)?
4891 ftest_domain : qualify_domain_recipient;
4892 deliver_domain_orig = deliver_domain;
4893 deliver_localpart = (ftest_localpart != NULL)?
4894 ftest_localpart : originator_login;
4895 deliver_localpart_orig = deliver_localpart;
4896 deliver_localpart_prefix = ftest_prefix;
4897 deliver_localpart_suffix = ftest_suffix;
4898 deliver_home = originator_home;
4900 if (return_path == NULL)
4902 printf("Return-path copied from sender\n");
4903 return_path = string_copy(sender_address);
4907 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4909 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4911 receive_add_recipient(
4912 string_sprintf("%s%s%s@%s",
4913 (ftest_prefix == NULL)? US"" : ftest_prefix,
4915 (ftest_suffix == NULL)? US"" : ftest_suffix,
4916 deliver_domain), -1);
4918 printf("Recipient = %s\n", recipients_list[0].address);
4919 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4920 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4922 (void)chdir("/"); /* Get away from wherever the user is running this from */
4924 /* Now we run either a system filter test, or a user filter test, or both.
4925 In the latter case, headers added by the system filter will persist and be
4926 available to the user filter. We need to copy the filter variables
4929 if ((filter_test & FTEST_SYSTEM) != 0)
4931 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4932 exim_exit(EXIT_FAILURE);
4935 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4937 if ((filter_test & FTEST_USER) != 0)
4939 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4940 exim_exit(EXIT_FAILURE);
4943 exim_exit(EXIT_SUCCESS);
4946 /* Else act on the result of message reception. We should not get here unless
4947 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
4948 will be TRUE. If it is not, check on the number of messages received in this
4951 if (!session_local_queue_only &&
4952 smtp_accept_queue_per_connection > 0 &&
4953 receive_messagecount > smtp_accept_queue_per_connection)
4955 session_local_queue_only = TRUE;
4956 queue_only_reason = 2;
4959 /* Initialize local_queue_only from session_local_queue_only. If it is false,
4960 and queue_only_load is set, check that the load average is below it. If it is
4961 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
4962 default), we put the whole session into queue_only mode. It then remains this
4963 way for any subsequent messages on the same SMTP connection. This is a
4964 deliberate choice; even though the load average may fall, it doesn't seem
4965 right to deliver later messages on the same call when not delivering earlier
4966 ones. However, there are odd cases where this is not wanted, so this can be
4967 changed by setting queue_only_load_latch false. */
4969 local_queue_only = session_local_queue_only;
4970 if (!local_queue_only && queue_only_load >= 0)
4972 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
4973 if (local_queue_only)
4975 queue_only_reason = 3;
4976 if (queue_only_load_latch) session_local_queue_only = TRUE;
4980 /* If running as an MUA wrapper, all queueing options and freezing options
4984 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4986 /* Log the queueing here, when it will get a message id attached, but
4987 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4990 if (local_queue_only) switch(queue_only_reason)
4993 log_write(L_delay_delivery,
4994 LOG_MAIN, "no immediate delivery: more than %d messages "
4995 "received in one connection", smtp_accept_queue_per_connection);
4999 log_write(L_delay_delivery,
5000 LOG_MAIN, "no immediate delivery: load average %.2f",
5001 (double)load_average/1000.0);
5005 /* Else do the delivery unless the ACL or local_scan() called for queue only
5006 or froze the message. Always deliver in a separate process. A fork failure is
5007 not a disaster, as the delivery will eventually happen on a subsequent queue
5008 run. The search cache must be tidied before the fork, as the parent will
5009 do it before exiting. The child will trigger a lookup failure and
5010 thereby defer the delivery if it tries to use (for example) a cached ldap
5011 connection that the parent has called unbind on. */
5013 else if (!queue_only_policy && !deliver_freeze)
5018 if ((pid = fork()) == 0)
5021 close_unwanted(); /* Close unwanted file descriptors and TLS */
5022 exim_nullstd(); /* Ensure std{in,out,err} exist */
5024 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5025 mode, deliver_drop_privilege is forced TRUE). */
5027 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5029 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5031 /* Control does not return here. */
5034 /* No need to re-exec */
5036 rc = deliver_message(message_id, FALSE, FALSE);
5038 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5039 EXIT_SUCCESS : EXIT_FAILURE);
5044 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5045 "process: %s", strerror(errno));
5048 /* In the parent, wait if synchronous delivery is required. This will
5049 always be the case in MUA wrapper mode. */
5051 else if (synchronous_delivery)
5054 while (wait(&status) != pid);
5055 if ((status & 0x00ff) != 0)
5056 log_write(0, LOG_MAIN|LOG_PANIC,
5057 "process %d crashed with signal %d while delivering %s",
5058 (int)pid, status & 0x00ff, message_id);
5059 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5063 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5064 automatically reaps children (see comments above the loop), clear away any
5065 finished subprocesses here, in case there are lots of messages coming in
5066 from the same source. */
5068 #ifndef SIG_IGN_WORKS
5069 while (waitpid(-1, NULL, WNOHANG) > 0);
5073 exim_exit(EXIT_SUCCESS); /* Never returns */
5074 return 0; /* To stop compiler warning */