1 /* $Cambridge: exim/src/src/exim.c,v 1.58 2007/09/04 08:18:12 nm4 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");
908 #ifdef WITH_OLD_DEMIME
909 fprintf(f, " Old_Demime");
911 #ifdef EXPERIMENTAL_SPF
912 fprintf(f, " Experimental_SPF");
914 #ifdef EXPERIMENTAL_SRS
915 fprintf(f, " Experimental_SRS");
917 #ifdef EXPERIMENTAL_BRIGHTMAIL
918 fprintf(f, " Experimental_Brightmail");
920 #ifdef EXPERIMENTAL_DOMAINKEYS
921 fprintf(f, " Experimental_DomainKeys");
925 fprintf(f, "Lookups:");
926 #ifdef LOOKUP_LSEARCH
927 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
933 fprintf(f, " dbm dbmnz");
936 fprintf(f, " dnsdb");
938 #ifdef LOOKUP_DSEARCH
939 fprintf(f, " dsearch");
942 fprintf(f, " ibase");
945 fprintf(f, " ldap ldapdn ldapm");
948 fprintf(f, " mysql");
951 fprintf(f, " nis nis0");
953 #ifdef LOOKUP_NISPLUS
954 fprintf(f, " nisplus");
957 fprintf(f, " oracle");
960 fprintf(f, " passwd");
963 fprintf(f, " pgsql");
966 fprintf(f, " sqlite");
969 fprintf(f, " testdb");
972 fprintf(f, " whoson");
976 fprintf(f, "Authenticators:");
978 fprintf(f, " cram_md5");
980 #ifdef AUTH_CYRUS_SASL
981 fprintf(f, " cyrus_sasl");
984 fprintf(f, " dovecot");
986 #ifdef AUTH_PLAINTEXT
987 fprintf(f, " plaintext");
994 fprintf(f, "Routers:");
996 fprintf(f, " accept");
998 #ifdef ROUTER_DNSLOOKUP
999 fprintf(f, " dnslookup");
1001 #ifdef ROUTER_IPLITERAL
1002 fprintf(f, " ipliteral");
1004 #ifdef ROUTER_IPLOOKUP
1005 fprintf(f, " iplookup");
1007 #ifdef ROUTER_MANUALROUTE
1008 fprintf(f, " manualroute");
1010 #ifdef ROUTER_QUERYPROGRAM
1011 fprintf(f, " queryprogram");
1013 #ifdef ROUTER_REDIRECT
1014 fprintf(f, " redirect");
1018 fprintf(f, "Transports:");
1019 #ifdef TRANSPORT_APPENDFILE
1020 fprintf(f, " appendfile");
1021 #ifdef SUPPORT_MAILDIR
1022 fprintf(f, "/maildir");
1024 #ifdef SUPPORT_MAILSTORE
1025 fprintf(f, "/mailstore");
1031 #ifdef TRANSPORT_AUTOREPLY
1032 fprintf(f, " autoreply");
1034 #ifdef TRANSPORT_LMTP
1035 fprintf(f, " lmtp");
1037 #ifdef TRANSPORT_PIPE
1038 fprintf(f, " pipe");
1040 #ifdef TRANSPORT_SMTP
1041 fprintf(f, " smtp");
1045 if (fixed_never_users[0] > 0)
1048 fprintf(f, "Fixed never_users: ");
1049 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1050 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1051 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1054 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1060 /*************************************************
1061 * Quote a local part *
1062 *************************************************/
1064 /* This function is used when a sender address or a From: or Sender: header
1065 line is being created from the caller's login, or from an authenticated_id. It
1066 applies appropriate quoting rules for a local part.
1068 Argument: the local part
1069 Returns: the local part, quoted if necessary
1073 local_part_quote(uschar *lpart)
1075 BOOL needs_quote = FALSE;
1080 for (t = lpart; !needs_quote && *t != 0; t++)
1082 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1083 (*t != '.' || t == lpart || t[1] == 0);
1086 if (!needs_quote) return lpart;
1089 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1093 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1096 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1099 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1100 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1101 yield = string_cat(yield, &size, &ptr, nq, 1);
1105 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1113 /*************************************************
1114 * Load readline() functions *
1115 *************************************************/
1117 /* This function is called from testing executions that read data from stdin,
1118 but only when running as the calling user. Currently, only -be does this. The
1119 function loads the readline() function library and passes back the functions.
1120 On some systems, it needs the curses library, so load that too, but try without
1121 it if loading fails. All this functionality has to be requested at build time.
1124 fn_readline_ptr pointer to where to put the readline pointer
1125 fn_addhist_ptr pointer to where to put the addhistory function
1127 Returns: the dlopen handle or NULL on failure
1131 set_readline(char * (**fn_readline_ptr)(char *),
1132 char * (**fn_addhist_ptr)(char *))
1135 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1137 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1138 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1140 if (dlhandle != NULL)
1142 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1143 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1147 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1156 /*************************************************
1157 * Get a line from stdin for testing things *
1158 *************************************************/
1160 /* This function is called when running tests that can take a number of lines
1161 of input (for example, -be and -bt). It handles continuations and trailing
1162 spaces. And prompting and a blank line output on eof. If readline() is in use,
1163 the arguments are non-NULL and provide the relevant functions.
1166 fn_readline readline function or NULL
1167 fn_addhist addhist function or NULL
1169 Returns: pointer to dynamic memory, or NULL at end of file
1173 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1178 uschar *yield = NULL;
1180 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1184 uschar buffer[1024];
1188 char *readline_line = NULL;
1189 if (fn_readline != NULL)
1191 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1192 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1193 p = US readline_line;
1198 /* readline() not in use */
1201 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1205 /* Handle the line */
1207 ss = p + (int)Ustrlen(p);
1208 while (ss > p && isspace(ss[-1])) ss--;
1212 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1215 yield = string_cat(yield, &size, &ptr, p, ss - p);
1218 if (fn_readline != NULL) free(readline_line);
1221 if (ss == p || yield[ptr-1] != '\\')
1229 if (yield == NULL) printf("\n");
1235 /*************************************************
1236 * Output usage information for the program *
1237 *************************************************/
1239 /* This function is called when there are no recipients
1240 or a specific --help argument was added.
1243 progname information on what name we were called by
1245 Returns: DOES NOT RETURN
1249 exim_usage(uschar *progname)
1252 /* Handle specific program invocation varients */
1253 if (Ustrcmp(progname, US"-mailq") == 0)
1256 "mailq - list the contents of the mail queue\n\n",
1257 "For a list of options, see the Exim documentation.\n");
1261 /* Generic usage - we output this whatever happens */
1263 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1264 "not directly from a shell command line. Options and/or arguments control\n"
1265 "what it does when called. For a list of options, see the Exim documentation.\n");
1272 /*************************************************
1273 * Entry point and high-level code *
1274 *************************************************/
1276 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1277 the appropriate action. All the necessary functions are present in the one
1278 binary. I originally thought one should split it up, but it turns out that so
1279 much of the apparatus is needed in each chunk that one might as well just have
1280 it all available all the time, which then makes the coding easier as well.
1283 argc count of entries in argv
1284 argv argument strings, with argv[0] being the program name
1286 Returns: EXIT_SUCCESS if terminated successfully
1287 EXIT_FAILURE otherwise, except when a message has been sent
1288 to the sender, and -oee was given
1292 main(int argc, char **cargv)
1294 uschar **argv = USS cargv;
1295 int arg_receive_timeout = -1;
1296 int arg_smtp_receive_timeout = -1;
1297 int arg_error_handling = error_handling;
1298 int filter_sfd = -1;
1299 int filter_ufd = -1;
1302 int list_queue_option = 0;
1304 int msg_action_arg = -1;
1305 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1306 int queue_only_reason = 0;
1308 int perl_start_option = 0;
1310 int recipients_arg = argc;
1311 int sender_address_domain = 0;
1312 int test_retry_arg = -1;
1313 int test_rewrite_arg = -1;
1314 BOOL arg_queue_only = FALSE;
1315 BOOL bi_option = FALSE;
1316 BOOL checking = FALSE;
1317 BOOL count_queue = FALSE;
1318 BOOL expansion_test = FALSE;
1319 BOOL extract_recipients = FALSE;
1320 BOOL forced_delivery = FALSE;
1321 BOOL f_end_dot = FALSE;
1322 BOOL deliver_give_up = FALSE;
1323 BOOL list_queue = FALSE;
1324 BOOL list_options = FALSE;
1325 BOOL local_queue_only;
1327 BOOL one_msg_action = FALSE;
1328 BOOL queue_only_set = FALSE;
1329 BOOL receiving_message = TRUE;
1330 BOOL sender_ident_set = FALSE;
1331 BOOL session_local_queue_only;
1333 BOOL removed_privilege = FALSE;
1334 BOOL usage_wanted = FALSE;
1335 BOOL verify_address_mode = FALSE;
1336 BOOL verify_as_sender = FALSE;
1337 BOOL version_printed = FALSE;
1338 uschar *alias_arg = NULL;
1339 uschar *called_as = US"";
1340 uschar *start_queue_run_id = NULL;
1341 uschar *stop_queue_run_id = NULL;
1342 uschar *expansion_test_message = NULL;
1343 uschar *ftest_domain = NULL;
1344 uschar *ftest_localpart = NULL;
1345 uschar *ftest_prefix = NULL;
1346 uschar *ftest_suffix = NULL;
1347 uschar *real_sender_address;
1348 uschar *originator_home = US"/";
1352 struct stat statbuf;
1353 pid_t passed_qr_pid = (pid_t)0;
1354 int passed_qr_pipe = -1;
1355 gid_t group_list[NGROUPS_MAX];
1357 /* Possible options for -R and -S */
1359 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1361 /* Need to define this in case we need to change the environment in order
1362 to get rid of a bogus time zone. We have to make it char rather than uschar
1363 because some OS define it in /usr/include/unistd.h. */
1365 extern char **environ;
1367 /* If the Exim user and/or group and/or the configuration file owner/group were
1368 defined by ref:name at build time, we must now find the actual uid/gid values.
1369 This is a feature to make the lives of binary distributors easier. */
1371 #ifdef EXIM_USERNAME
1372 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1374 exim_gid = pw->pw_gid;
1378 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1384 #ifdef EXIM_GROUPNAME
1385 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1387 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1393 #ifdef CONFIGURE_OWNERNAME
1394 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1396 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1397 CONFIGURE_OWNERNAME);
1402 #ifdef CONFIGURE_GROUPNAME
1403 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1405 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1406 CONFIGURE_GROUPNAME);
1411 /* In the Cygwin environment, some initialization needs doing. It is fudged
1412 in by means of this macro. */
1418 /* Check a field which is patched when we are running Exim within its
1419 testing harness; do a fast initial check, and then the whole thing. */
1421 running_in_test_harness =
1422 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1424 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1425 at the start of a program; however, it seems that some environments do not
1426 follow this. A "strange" locale can affect the formatting of timestamps, so we
1429 setlocale(LC_ALL, "C");
1431 /* Set up the default handler for timing using alarm(). */
1433 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1435 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1436 because store_malloc writes a log entry on failure. */
1438 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1439 if (log_buffer == NULL)
1441 fprintf(stderr, "exim: failed to get store for log buffer\n");
1445 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1446 NULL when the daemon is run and the file is closed. We have to use this
1447 indirection, because some systems don't allow writing to the variable "stderr".
1450 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1452 /* Arrange for the PCRE regex library to use our store functions. Note that
1453 the normal calls are actually macros that add additional arguments for
1454 debugging purposes so we have to assign specially constructed functions here.
1455 The default is to use store in the stacking pool, but this is overridden in the
1456 regex_must_compile() function. */
1458 pcre_malloc = function_store_get;
1459 pcre_free = function_dummy_free;
1461 /* Ensure there is a big buffer for temporary use in several places. It is put
1462 in malloc store so that it can be freed for enlargement if necessary. */
1464 big_buffer = store_malloc(big_buffer_size);
1466 /* Set up the handler for the data request signal, and set the initial
1467 descriptive text. */
1469 set_process_info("initializing");
1470 os_restarting_signal(SIGUSR1, usr1_handler);
1472 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1473 in the daemon code. For the rest of Exim's uses, we ignore it. */
1475 signal(SIGHUP, SIG_IGN);
1477 /* We don't want to die on pipe errors as the code is written to handle
1478 the write error instead. */
1480 signal(SIGPIPE, SIG_IGN);
1482 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1483 set to SIG_IGN. This causes subprocesses that complete before the parent
1484 process waits for them not to hang around, so when Exim calls wait(), nothing
1485 is there. The wait() code has been made robust against this, but let's ensure
1486 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1487 ending status. We use sigaction rather than plain signal() on those OS where
1488 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1489 problem on AIX with this.) */
1493 struct sigaction act;
1494 act.sa_handler = SIG_DFL;
1495 sigemptyset(&(act.sa_mask));
1497 sigaction(SIGCHLD, &act, NULL);
1500 signal(SIGCHLD, SIG_DFL);
1503 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1508 /* Set up the version number. Set up the leading 'E' for the external form of
1509 message ids, set the pointer to the internal form, and initialize it to
1510 indicate no message being processed. */
1513 message_id_option[0] = '-';
1514 message_id_external = message_id_option + 1;
1515 message_id_external[0] = 'E';
1516 message_id = message_id_external + 1;
1519 /* Set the umask to zero so that any files Exim creates using open() are
1520 created with the modes that it specifies. NOTE: Files created with fopen() have
1521 a problem, which was not recognized till rather late (February 2006). With this
1522 umask, such files will be world writeable. (They are all content scanning files
1523 in the spool directory, which isn't world-accessible, so this is not a
1524 disaster, but it's untidy.) I don't want to change this overall setting,
1525 however, because it will interact badly with the open() calls. Instead, there's
1526 now a function called modefopen() that fiddles with the umask while calling
1531 /* Precompile the regular expression for matching a message id. Keep this in
1532 step with the code that generates ids in the accept.c module. We need to do
1533 this here, because the -M options check their arguments for syntactic validity
1534 using mac_ismsgid, which uses this. */
1537 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1539 /* Precompile the regular expression that is used for matching an SMTP error
1540 code, possibly extended, at the start of an error message. Note that the
1541 terminating whitespace character is included. */
1544 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1547 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1548 this seems to be a generally accepted convention, since one finds symbolic
1549 links called "mailq" in standard OS configurations. */
1551 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1552 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1555 receiving_message = FALSE;
1556 called_as = US"-mailq";
1559 /* If the program is called as "rmail" treat it as equivalent to
1560 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1561 i.e. preventing a single dot on a line from terminating the message, and
1562 returning with zero return code, even in cases of error (provided an error
1563 message has been sent). */
1565 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1566 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1569 called_as = US"-rmail";
1570 errors_sender_rc = EXIT_SUCCESS;
1573 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1574 this is a smail convention. */
1576 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1577 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1579 smtp_input = smtp_batched_input = TRUE;
1580 called_as = US"-rsmtp";
1583 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1584 this is a smail convention. */
1586 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1587 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1590 receiving_message = FALSE;
1591 called_as = US"-runq";
1594 /* If the program is called as "newaliases" treat it as equivalent to
1595 "exim -bi"; this is a sendmail convention. */
1597 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1598 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1601 receiving_message = FALSE;
1602 called_as = US"-newaliases";
1605 /* Save the original effective uid for a couple of uses later. It should
1606 normally be root, but in some esoteric environments it may not be. */
1608 original_euid = geteuid();
1610 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1611 to be the same as the real ones. This makes a difference only if Exim is setuid
1612 (or setgid) to something other than root, which could be the case in some
1613 special configurations. */
1615 real_uid = getuid();
1616 real_gid = getgid();
1618 if (real_uid == root_uid)
1624 /* If neither the original real uid nor the original euid was root, Exim is
1625 running in an unprivileged state. */
1627 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1629 /* If the first argument is --help, set usage_wanted and pretend there
1630 are no arguments. This will cause a brief message to be given. We do
1631 the message generation downstream so we can pick up how we were invoked */
1633 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0)
1636 usage_wanted = TRUE;
1639 /* Scan the program's arguments. Some can be dealt with right away; others are
1640 simply recorded for checking and handling afterwards. Do a high-level switch
1641 on the second character (the one after '-'), to save some effort. */
1643 for (i = 1; i < argc; i++)
1645 BOOL badarg = FALSE;
1646 uschar *arg = argv[i];
1650 /* An argument not starting with '-' is the start of a recipients list;
1651 break out of the options-scanning loop. */
1659 /* An option consistion of -- terminates the options */
1661 if (Ustrcmp(arg, "--") == 0)
1663 recipients_arg = i + 1;
1667 /* Handle flagged options */
1669 switchchar = arg[1];
1672 /* Make all -ex options synonymous with -oex arguments, since that
1673 is assumed by various callers. Also make -qR options synonymous with -R
1674 options, as that seems to be required as well. Allow for -qqR too, and
1675 the same for -S options. */
1677 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1678 Ustrncmp(arg+1, "qR", 2) == 0 ||
1679 Ustrncmp(arg+1, "qS", 2) == 0)
1681 switchchar = arg[2];
1684 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1686 switchchar = arg[3];
1688 queue_2stage = TRUE;
1691 /* Make -r synonymous with -f, since it is a documented alias */
1693 else if (arg[1] == 'r') switchchar = 'f';
1695 /* Make -ov synonymous with -v */
1697 else if (Ustrcmp(arg, "-ov") == 0)
1703 /* High-level switch on active initial letter */
1707 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1708 so has no need of it. */
1711 if (*argrest == 0) i++; /* Skip over the type */
1716 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1718 /* -bd: Run in daemon mode, awaiting SMTP connections.
1719 -bdf: Ditto, but in the foreground.
1722 if (*argrest == 'd')
1724 daemon_listen = TRUE;
1725 if (*(++argrest) == 'f') background_daemon = FALSE;
1726 else if (*argrest != 0) { badarg = TRUE; break; }
1729 /* -be: Run in expansion test mode
1730 -bem: Ditto, but read a message from a file first
1733 else if (*argrest == 'e')
1735 expansion_test = checking = TRUE;
1736 if (argrest[1] == 'm')
1738 if (++i >= argc) { badarg = TRUE; break; }
1739 expansion_test_message = argv[i];
1742 if (argrest[1] != 0) { badarg = TRUE; break; }
1745 /* -bF: Run system filter test */
1747 else if (*argrest == 'F')
1749 filter_test |= FTEST_SYSTEM;
1750 if (*(++argrest) != 0) { badarg = TRUE; break; }
1751 if (++i < argc) filter_test_sfile = argv[i]; else
1753 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1758 /* -bf: Run user filter test
1759 -bfd: Set domain for filter testing
1760 -bfl: Set local part for filter testing
1761 -bfp: Set prefix for filter testing
1762 -bfs: Set suffix for filter testing
1765 else if (*argrest == 'f')
1767 if (*(++argrest) == 0)
1769 filter_test |= FTEST_USER;
1770 if (++i < argc) filter_test_ufile = argv[i]; else
1772 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1780 fprintf(stderr, "exim: string expected after %s\n", arg);
1783 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1784 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1785 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1786 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1787 else { badarg = TRUE; break; }
1791 /* -bh: Host checking - an IP address must follow. */
1793 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1795 if (++i >= argc) { badarg = TRUE; break; }
1796 sender_host_address = argv[i];
1797 host_checking = checking = log_testing_mode = TRUE;
1798 host_checking_callout = argrest[1] == 'c';
1801 /* -bi: This option is used by sendmail to initialize *the* alias file,
1802 though it has the -oA option to specify a different file. Exim has no
1803 concept of *the* alias file, but since Sun's YP make script calls
1804 sendmail this way, some support must be provided. */
1806 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1808 /* -bm: Accept and deliver message - the default option. Reinstate
1809 receiving_message, which got turned off for all -b options. */
1811 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1813 /* -bnq: For locally originating messages, do not qualify unqualified
1814 addresses. In the envelope, this causes errors; in header lines they
1817 else if (Ustrcmp(argrest, "nq") == 0)
1819 allow_unqualified_sender = FALSE;
1820 allow_unqualified_recipient = FALSE;
1823 /* -bpxx: List the contents of the mail queue, in various forms. If
1824 the option is -bpc, just a queue count is needed. Otherwise, if the
1825 first letter after p is r, then order is random. */
1827 else if (*argrest == 'p')
1829 if (*(++argrest) == 'c')
1832 if (*(++argrest) != 0) badarg = TRUE;
1836 if (*argrest == 'r')
1838 list_queue_option = 8;
1841 else list_queue_option = 0;
1845 /* -bp: List the contents of the mail queue, top-level only */
1847 if (*argrest == 0) {}
1849 /* -bpu: List the contents of the mail queue, top-level undelivered */
1851 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1853 /* -bpa: List the contents of the mail queue, including all delivered */
1855 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1857 /* Unknown after -bp[r] */
1867 /* -bP: List the configuration variables given as the address list.
1868 Force -v, so configuration errors get displayed. */
1870 else if (Ustrcmp(argrest, "P") == 0)
1872 list_options = TRUE;
1873 debug_selector |= D_v;
1874 debug_file = stderr;
1877 /* -brt: Test retry configuration lookup */
1879 else if (Ustrcmp(argrest, "rt") == 0)
1881 test_retry_arg = i + 1;
1885 /* -brw: Test rewrite configuration */
1887 else if (Ustrcmp(argrest, "rw") == 0)
1889 test_rewrite_arg = i + 1;
1893 /* -bS: Read SMTP commands on standard input, but produce no replies -
1894 all errors are reported by sending messages. */
1896 else if (Ustrcmp(argrest, "S") == 0)
1897 smtp_input = smtp_batched_input = receiving_message = TRUE;
1899 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1900 on standard output. */
1902 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1904 /* -bt: address testing mode */
1906 else if (Ustrcmp(argrest, "t") == 0)
1907 address_test_mode = checking = log_testing_mode = TRUE;
1909 /* -bv: verify addresses */
1911 else if (Ustrcmp(argrest, "v") == 0)
1912 verify_address_mode = checking = log_testing_mode = TRUE;
1914 /* -bvs: verify sender addresses */
1916 else if (Ustrcmp(argrest, "vs") == 0)
1918 verify_address_mode = checking = log_testing_mode = TRUE;
1919 verify_as_sender = TRUE;
1922 /* -bV: Print version string and support details */
1924 else if (Ustrcmp(argrest, "V") == 0)
1926 printf("Exim version %s #%s built %s\n", version_string,
1927 version_cnumber, version_date);
1928 printf("%s\n", CS version_copyright);
1929 version_printed = TRUE;
1930 show_whats_supported(stdout);
1937 /* -C: change configuration file list; ignore if it isn't really
1938 a change! Enforce a prefix check if required. */
1943 if(++i < argc) argrest = argv[i]; else
1944 { badarg = TRUE; break; }
1946 if (Ustrcmp(config_main_filelist, argrest) != 0)
1948 #ifdef ALT_CONFIG_PREFIX
1950 int len = Ustrlen(ALT_CONFIG_PREFIX);
1951 uschar *list = argrest;
1953 while((filename = string_nextinlist(&list, &sep, big_buffer,
1954 big_buffer_size)) != NULL)
1956 if ((Ustrlen(filename) < len ||
1957 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1958 Ustrstr(filename, "/../") != NULL) &&
1959 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1961 fprintf(stderr, "-C Permission denied\n");
1967 config_main_filelist = argrest;
1968 config_changed = TRUE;
1973 /* -D: set up a macro definition */
1976 #ifdef DISABLE_D_OPTION
1977 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1982 macro_item *mlast = NULL;
1985 uschar *s = argrest;
1987 while (isspace(*s)) s++;
1989 if (*s < 'A' || *s > 'Z')
1991 fprintf(stderr, "exim: macro name set by -D must start with "
1992 "an upper case letter\n");
1996 while (isalnum(*s) || *s == '_')
1998 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2002 if (ptr == 0) { badarg = TRUE; break; }
2003 while (isspace(*s)) s++;
2006 if (*s++ != '=') { badarg = TRUE; break; }
2007 while (isspace(*s)) s++;
2010 for (m = macros; m != NULL; m = m->next)
2012 if (Ustrcmp(m->name, name) == 0)
2014 fprintf(stderr, "exim: duplicated -D in command line\n");
2020 m = store_get(sizeof(macro_item) + Ustrlen(name));
2022 m->command_line = TRUE;
2023 if (mlast == NULL) macros = m; else mlast->next = m;
2024 Ustrcpy(m->name, name);
2025 m->replacement = string_copy(s);
2027 if (clmacro_count >= MAX_CLMACROS)
2029 fprintf(stderr, "exim: too many -D options on command line\n");
2032 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2038 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2039 The latter is now a no-op, retained for compatibility only. If -dd is used,
2040 debugging subprocesses of the daemon is disabled. */
2043 if (Ustrcmp(argrest, "ropcr") == 0)
2045 /* drop_cr = TRUE; */
2048 /* Use an intermediate variable so that we don't set debugging while
2049 decoding the debugging bits. */
2053 unsigned int selector = D_default;
2056 if (*argrest == 'd')
2058 debug_daemon = TRUE;
2062 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2063 debug_options_count, US"debug");
2064 debug_selector = selector;
2069 /* -E: This is a local error message. This option is not intended for
2070 external use at all, but is not restricted to trusted callers because it
2071 does no harm (just suppresses certain error messages) and if Exim is run
2072 not setuid root it won't always be trusted when it generates error
2073 messages using this option. If there is a message id following -E, point
2074 message_reference at it, for logging. */
2077 local_error_message = TRUE;
2078 if (mac_ismsgid(argrest)) message_reference = argrest;
2082 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2083 option, so it looks as if historically the -oex options are also callable
2084 without the leading -o. So we have to accept them. Before the switch,
2085 anything starting -oe has been converted to -e. Exim does not support all
2086 of the sendmail error options. */
2089 if (Ustrcmp(argrest, "e") == 0)
2091 arg_error_handling = ERRORS_SENDER;
2092 errors_sender_rc = EXIT_SUCCESS;
2094 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2095 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2096 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2097 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2102 /* -F: Set sender's full name, used instead of the gecos entry from
2103 the password file. Since users can usually alter their gecos entries,
2104 there's no security involved in using this instead. The data can follow
2105 the -F or be in the next argument. */
2110 if(++i < argc) argrest = argv[i]; else
2111 { badarg = TRUE; break; }
2113 originator_name = argrest;
2114 sender_name_forced = TRUE;
2118 /* -f: Set sender's address - this value is only actually used if Exim is
2119 run by a trusted user, or if untrusted_set_sender is set and matches the
2120 address, except that the null address can always be set by any user. The
2121 test for this happens later, when the value given here is ignored when not
2122 permitted. For an untrusted user, the actual sender is still put in Sender:
2123 if it doesn't match the From: header (unless no_local_from_check is set).
2124 The data can follow the -f or be in the next argument. The -r switch is an
2125 obsolete form of -f but since there appear to be programs out there that
2126 use anything that sendmail has ever supported, better accept it - the
2127 synonymizing is done before the switch above.
2129 At this stage, we must allow domain literal addresses, because we don't
2130 know what the setting of allow_domain_literals is yet. Ditto for trailing
2131 dots and strip_trailing_dot. */
2139 if (i+1 < argc) argrest = argv[++i]; else
2140 { badarg = TRUE; break; }
2144 sender_address = string_sprintf(""); /* Ensure writeable memory */
2148 uschar *temp = argrest + Ustrlen(argrest) - 1;
2149 while (temp >= argrest && isspace(*temp)) temp--;
2150 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2151 allow_domain_literals = TRUE;
2152 strip_trailing_dot = TRUE;
2153 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2154 &sender_address_domain, TRUE);
2155 allow_domain_literals = FALSE;
2156 strip_trailing_dot = FALSE;
2157 if (sender_address == NULL)
2159 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2160 return EXIT_FAILURE;
2163 sender_address_forced = TRUE;
2167 /* This is some Sendmail thing which can be ignored */
2172 /* -h: Set the hop count for an incoming message. Exim does not currently
2173 support this; it always computes it by counting the Received: headers.
2174 To put it in will require a change to the spool header file format. */
2179 if(++i < argc) argrest = argv[i]; else
2180 { badarg = TRUE; break; }
2182 if (!isdigit(*argrest)) badarg = TRUE;
2186 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2187 not to be documented for sendmail but mailx (at least) uses it) */
2190 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2195 receiving_message = FALSE;
2197 /* -MC: continue delivery of another message via an existing open
2198 file descriptor. This option is used for an internal call by the
2199 smtp transport when there is a pending message waiting to go to an
2200 address to which it has got a connection. Five subsequent arguments are
2201 required: transport name, host name, IP address, sequence number, and
2202 message_id. Transports may decline to create new processes if the sequence
2203 number gets too big. The channel is stdin. This (-MC) must be the last
2204 argument. There's a subsequent check that the real-uid is privileged.
2206 If we are running in the test harness. delay for a bit, to let the process
2207 that set this one up complete. This makes for repeatability of the logging,
2210 if (Ustrcmp(argrest, "C") == 0)
2212 union sockaddr_46 interface_sock;
2213 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2217 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2218 return EXIT_FAILURE;
2221 if (msg_action_arg >= 0)
2223 fprintf(stderr, "exim: incompatible arguments\n");
2224 return EXIT_FAILURE;
2227 continue_transport = argv[++i];
2228 continue_hostname = argv[++i];
2229 continue_host_address = argv[++i];
2230 continue_sequence = Uatoi(argv[++i]);
2231 msg_action = MSG_DELIVER;
2232 msg_action_arg = ++i;
2233 forced_delivery = TRUE;
2234 queue_run_pid = passed_qr_pid;
2235 queue_run_pipe = passed_qr_pipe;
2237 if (!mac_ismsgid(argv[i]))
2239 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2241 return EXIT_FAILURE;
2244 /* Set up $sending_ip_address and $sending_port */
2246 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2248 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2252 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2254 return EXIT_FAILURE;
2257 if (running_in_test_harness) millisleep(500);
2261 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2262 precedes -MC (see above). The flag indicates that the host to which
2263 Exim is connected has accepted an AUTH sequence. */
2265 else if (Ustrcmp(argrest, "CA") == 0)
2267 smtp_authenticated = TRUE;
2271 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2272 it preceded -MC (see above) */
2274 else if (Ustrcmp(argrest, "CP") == 0)
2276 smtp_use_pipelining = TRUE;
2280 /* -MCQ: pass on the pid of the queue-running process that started
2281 this chain of deliveries and the fd of its synchronizing pipe; this
2282 is useful only when it precedes -MC (see above) */
2284 else if (Ustrcmp(argrest, "CQ") == 0)
2286 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2288 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2293 /* -MCS: set the smtp_use_size flag; this is useful only when it
2294 precedes -MC (see above) */
2296 else if (Ustrcmp(argrest, "CS") == 0)
2298 smtp_use_size = TRUE;
2302 /* -MCT: set the tls_offered flag; this is useful only when it
2303 precedes -MC (see above). The flag indicates that the host to which
2304 Exim is connected has offered TLS support. */
2307 else if (Ustrcmp(argrest, "CT") == 0)
2314 /* -M[x]: various operations on the following list of message ids:
2315 -M deliver the messages, ignoring next retry times and thawing
2316 -Mc deliver the messages, checking next retry times, no thawing
2317 -Mf freeze the messages
2318 -Mg give up on the messages
2319 -Mt thaw the messages
2320 -Mrm remove the messages
2321 In the above cases, this must be the last option. There are also the
2322 following options which are followed by a single message id, and which
2323 act on that message. Some of them use the "recipient" addresses as well.
2324 -Mar add recipient(s)
2325 -Mmad mark all recipients delivered
2326 -Mmd mark recipients(s) delivered
2328 -Mset load a message for use with -be
2330 -Mvc show copy (of whole message, in RFC 2822 format)
2335 else if (*argrest == 0)
2337 msg_action = MSG_DELIVER;
2338 forced_delivery = deliver_force_thaw = TRUE;
2340 else if (Ustrcmp(argrest, "ar") == 0)
2342 msg_action = MSG_ADD_RECIPIENT;
2343 one_msg_action = TRUE;
2345 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2346 else if (Ustrcmp(argrest, "es") == 0)
2348 msg_action = MSG_EDIT_SENDER;
2349 one_msg_action = TRUE;
2351 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2352 else if (Ustrcmp(argrest, "g") == 0)
2354 msg_action = MSG_DELIVER;
2355 deliver_give_up = TRUE;
2357 else if (Ustrcmp(argrest, "mad") == 0)
2359 msg_action = MSG_MARK_ALL_DELIVERED;
2361 else if (Ustrcmp(argrest, "md") == 0)
2363 msg_action = MSG_MARK_DELIVERED;
2364 one_msg_action = TRUE;
2366 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2367 else if (Ustrcmp(argrest, "set") == 0)
2369 msg_action = MSG_LOAD;
2370 one_msg_action = TRUE;
2372 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2373 else if (Ustrcmp(argrest, "vb") == 0)
2375 msg_action = MSG_SHOW_BODY;
2376 one_msg_action = TRUE;
2378 else if (Ustrcmp(argrest, "vc") == 0)
2380 msg_action = MSG_SHOW_COPY;
2381 one_msg_action = TRUE;
2383 else if (Ustrcmp(argrest, "vh") == 0)
2385 msg_action = MSG_SHOW_HEADER;
2386 one_msg_action = TRUE;
2388 else if (Ustrcmp(argrest, "vl") == 0)
2390 msg_action = MSG_SHOW_LOG;
2391 one_msg_action = TRUE;
2393 else { badarg = TRUE; break; }
2395 /* All the -Mxx options require at least one message id. */
2397 msg_action_arg = i + 1;
2398 if (msg_action_arg >= argc)
2400 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2401 return EXIT_FAILURE;
2404 /* Some require only message ids to follow */
2406 if (!one_msg_action)
2409 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2411 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2413 return EXIT_FAILURE;
2415 goto END_ARG; /* Remaining args are ids */
2418 /* Others require only one message id, possibly followed by addresses,
2419 which will be handled as normal arguments. */
2423 if (!mac_ismsgid(argv[msg_action_arg]))
2425 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2426 argv[msg_action_arg], arg);
2427 return EXIT_FAILURE;
2434 /* Some programs seem to call the -om option without the leading o;
2435 for sendmail it askes for "me too". Exim always does this. */
2438 if (*argrest != 0) badarg = TRUE;
2442 /* -N: don't do delivery - a debugging option that stops transports doing
2443 their thing. It implies debugging at the D_v level. */
2448 dont_deliver = TRUE;
2449 debug_selector |= D_v;
2450 debug_file = stderr;
2456 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2462 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2463 option to the specified value. This form uses long names. We need to handle
2464 -O option=value and -Ooption=value. */
2471 fprintf(stderr, "exim: string expected after -O\n");
2479 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2482 if (*argrest == 'A')
2484 alias_arg = argrest + 1;
2485 if (alias_arg[0] == 0)
2487 if (i+1 < argc) alias_arg = argv[++i]; else
2489 fprintf(stderr, "exim: string expected after -oA\n");
2495 /* -oB: Set a connection message max value for remote deliveries */
2497 else if (*argrest == 'B')
2499 uschar *p = argrest + 1;
2502 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2504 connection_max_messages = 1;
2513 fprintf(stderr, "exim: number expected after -oB\n");
2516 connection_max_messages = Uatoi(p);
2520 /* -odb: background delivery */
2522 else if (Ustrcmp(argrest, "db") == 0)
2524 synchronous_delivery = FALSE;
2525 arg_queue_only = FALSE;
2526 queue_only_set = TRUE;
2529 /* -odf: foreground delivery (smail-compatible option); same effect as
2530 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2533 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2535 synchronous_delivery = TRUE;
2536 arg_queue_only = FALSE;
2537 queue_only_set = TRUE;
2540 /* -odq: queue only */
2542 else if (Ustrcmp(argrest, "dq") == 0)
2544 synchronous_delivery = FALSE;
2545 arg_queue_only = TRUE;
2546 queue_only_set = TRUE;
2549 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2550 but no remote delivery */
2552 else if (Ustrcmp(argrest, "dqs") == 0)
2555 arg_queue_only = FALSE;
2556 queue_only_set = TRUE;
2559 /* -oex: Sendmail error flags. As these are also accepted without the
2560 leading -o prefix, for compatibility with vacation and other callers,
2561 they are handled with -e above. */
2563 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2564 -oitrue: Another sendmail syntax for the same */
2566 else if (Ustrcmp(argrest, "i") == 0 ||
2567 Ustrcmp(argrest, "itrue") == 0)
2570 /* -oM*: Set various characteristics for an incoming message; actually
2571 acted on for trusted callers only. */
2573 else if (*argrest == 'M')
2577 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2581 /* -oMa: Set sender host address */
2583 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2585 /* -oMaa: Set authenticator name */
2587 else if (Ustrcmp(argrest, "Maa") == 0)
2588 sender_host_authenticated = argv[++i];
2590 /* -oMas: setting authenticated sender */
2592 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2594 /* -oMai: setting authenticated id */
2596 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2598 /* -oMi: Set incoming interface address */
2600 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2602 /* -oMr: Received protocol */
2604 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2606 /* -oMs: Set sender host name */
2608 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2610 /* -oMt: Set sender ident */
2612 else if (Ustrcmp(argrest, "Mt") == 0)
2614 sender_ident_set = TRUE;
2615 sender_ident = argv[++i];
2618 /* Else a bad argument */
2627 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2628 seem to call this as -m (undocumented), so that is also accepted (see
2631 else if (Ustrcmp(argrest, "m") == 0) {}
2633 /* -oo: An ancient flag for old-style addresses which still seems to
2634 crop up in some calls (see in SCO). */
2636 else if (Ustrcmp(argrest, "o") == 0) {}
2638 /* -oP <name>: set pid file path for daemon */
2640 else if (Ustrcmp(argrest, "P") == 0)
2641 override_pid_file_path = argv[++i];
2643 /* -or <n>: set timeout for non-SMTP acceptance
2644 -os <n>: set timeout for SMTP acceptance */
2646 else if (*argrest == 'r' || *argrest == 's')
2648 int *tp = (*argrest == 'r')?
2649 &arg_receive_timeout : &arg_smtp_receive_timeout;
2650 if (argrest[1] == 0)
2652 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2654 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2657 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2662 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2664 else if (Ustrcmp(argrest, "X") == 0)
2665 override_local_interfaces = argv[++i];
2667 /* Unknown -o argument */
2673 /* -ps: force Perl startup; -pd force delayed Perl startup */
2677 if (*argrest == 's' && argrest[1] == 0)
2679 perl_start_option = 1;
2682 if (*argrest == 'd' && argrest[1] == 0)
2684 perl_start_option = -1;
2689 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2690 which sets the host protocol and host name */
2694 if (i+1 < argc) argrest = argv[++i]; else
2695 { badarg = TRUE; break; }
2700 uschar *hn = Ustrchr(argrest, ':');
2703 received_protocol = argrest;
2707 received_protocol = string_copyn(argrest, hn - argrest);
2708 sender_host_name = hn + 1;
2715 receiving_message = FALSE;
2716 if (queue_interval >= 0)
2718 fprintf(stderr, "exim: -q specified more than once\n");
2722 /* -qq...: Do queue runs in a 2-stage manner */
2724 if (*argrest == 'q')
2726 queue_2stage = TRUE;
2730 /* -qi...: Do only first (initial) deliveries */
2732 if (*argrest == 'i')
2734 queue_run_first_delivery = TRUE;
2738 /* -qf...: Run the queue, forcing deliveries
2739 -qff..: Ditto, forcing thawing as well */
2741 if (*argrest == 'f')
2743 queue_run_force = TRUE;
2744 if (*(++argrest) == 'f')
2746 deliver_force_thaw = TRUE;
2751 /* -q[f][f]l...: Run the queue only on local deliveries */
2753 if (*argrest == 'l')
2755 queue_run_local = TRUE;
2759 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2760 optionally starting from a given message id. */
2762 if (*argrest == 0 &&
2763 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2766 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2767 start_queue_run_id = argv[++i];
2768 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2769 stop_queue_run_id = argv[++i];
2772 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2773 optionally local only. */
2778 queue_interval = readconf_readtime(argrest, 0, FALSE);
2780 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2781 if (queue_interval <= 0)
2783 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2790 case 'R': /* Synonymous with -qR... */
2791 receiving_message = FALSE;
2793 /* -Rf: As -R (below) but force all deliveries,
2794 -Rff: Ditto, but also thaw all frozen messages,
2795 -Rr: String is regex
2796 -Rrf: Regex and force
2797 -Rrff: Regex and force and thaw
2799 in all cases provided there are no further characters in this
2805 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2807 if (Ustrcmp(argrest, rsopts[i]) == 0)
2809 if (i != 2) queue_run_force = TRUE;
2810 if (i >= 2) deliver_selectstring_regex = TRUE;
2811 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2812 argrest += Ustrlen(rsopts[i]);
2817 /* -R: Set string to match in addresses for forced queue run to
2818 pick out particular messages. */
2822 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2824 fprintf(stderr, "exim: string expected after -R\n");
2828 else deliver_selectstring = argrest;
2832 /* -r: an obsolete synonym for -f (see above) */
2835 /* -S: Like -R but works on sender. */
2837 case 'S': /* Synonymous with -qS... */
2838 receiving_message = FALSE;
2840 /* -Sf: As -S (below) but force all deliveries,
2841 -Sff: Ditto, but also thaw all frozen messages,
2842 -Sr: String is regex
2843 -Srf: Regex and force
2844 -Srff: Regex and force and thaw
2846 in all cases provided there are no further characters in this
2852 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2854 if (Ustrcmp(argrest, rsopts[i]) == 0)
2856 if (i != 2) queue_run_force = TRUE;
2857 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2858 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2859 argrest += Ustrlen(rsopts[i]);
2864 /* -S: Set string to match in addresses for forced queue run to
2865 pick out particular messages. */
2869 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2871 fprintf(stderr, "exim: string expected after -S\n");
2875 else deliver_selectstring_sender = argrest;
2878 /* -Tqt is an option that is exclusively for use by the testing suite.
2879 It is not recognized in other circumstances. It allows for the setting up
2880 of explicit "queue times" so that various warning/retry things can be
2881 tested. Otherwise variability of clock ticks etc. cause problems. */
2884 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2885 fudged_queue_times = argv[++i];
2890 /* -t: Set flag to extract recipients from body of message. */
2893 if (*argrest == 0) extract_recipients = TRUE;
2895 /* -ti: Set flag to extract recipients from body of message, and also
2896 specify that dot does not end the message. */
2898 else if (Ustrcmp(argrest, "i") == 0)
2900 extract_recipients = TRUE;
2904 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2907 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2914 /* -U: This means "initial user submission" in sendmail, apparently. The
2915 doc claims that in future sendmail may refuse syntactically invalid
2916 messages instead of fixing them. For the moment, we just ignore it. */
2922 /* -v: verify things - this is a very low-level debugging */
2927 debug_selector |= D_v;
2928 debug_file = stderr;
2934 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2936 The -x flag tells the sendmail command that mail from a local
2937 mail program has National Language Support (NLS) extended characters
2938 in the body of the mail item. The sendmail command can send mail with
2939 extended NLS characters across networks that normally corrupts these
2942 As Exim is 8-bit clean, it just ignores this flag. */
2945 if (*argrest != 0) badarg = TRUE;
2948 /* All other initial characters are errors */
2953 } /* End of high-level switch statement */
2955 /* Failed to recognize the option, or syntax error */
2959 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2960 "option %s\n", arg);
2966 /* If -R or -S have been specified without -q, assume a single queue run. */
2968 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2969 queue_interval < 0) queue_interval = 0;
2973 /* If usage_wanted is set we call the usage function - which never returns */
2974 if (usage_wanted) exim_usage(called_as);
2976 /* Arguments have been processed. Check for incompatibilities. */
2978 (smtp_input || extract_recipients || recipients_arg < argc) &&
2979 (daemon_listen || queue_interval >= 0 || bi_option ||
2980 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2981 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2984 msg_action_arg > 0 &&
2985 (daemon_listen || queue_interval >= 0 || list_options ||
2986 (checking && msg_action != MSG_LOAD) ||
2987 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2990 (daemon_listen || queue_interval >= 0) &&
2991 (sender_address != NULL || list_options || list_queue || checking ||
2995 daemon_listen && queue_interval == 0
2999 (checking || smtp_input || extract_recipients ||
3000 filter_test != FTEST_NONE || bi_option)
3003 verify_address_mode &&
3004 (address_test_mode || smtp_input || extract_recipients ||
3005 filter_test != FTEST_NONE || bi_option)
3008 address_test_mode && (smtp_input || extract_recipients ||
3009 filter_test != FTEST_NONE || bi_option)
3012 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3016 deliver_selectstring != NULL && queue_interval < 0
3019 msg_action == MSG_LOAD &&
3020 (!expansion_test || expansion_test_message != NULL)
3024 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3028 /* If debugging is set up, set the file and the file descriptor to pass on to
3029 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3030 to run in the foreground. */
3032 if (debug_selector != 0)
3034 debug_file = stderr;
3035 debug_fd = fileno(debug_file);
3036 background_daemon = FALSE;
3037 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3038 if (debug_selector != D_v) /* -v only doesn't show this */
3040 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3041 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3043 show_whats_supported(stderr);
3047 /* When started with root privilege, ensure that the limits on the number of
3048 open files and the number of processes (where that is accessible) are
3049 sufficiently large, or are unset, in case Exim has been called from an
3050 environment where the limits are screwed down. Not all OS have the ability to
3051 change some of these limits. */
3055 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3061 #ifdef RLIMIT_NOFILE
3062 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3064 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3066 rlp.rlim_cur = rlp.rlim_max = 0;
3069 /* I originally chose 1000 as a nice big number that was unlikely to
3070 be exceeded. It turns out that some older OS have a fixed upper limit of
3073 if (rlp.rlim_cur < 1000)
3075 rlp.rlim_cur = rlp.rlim_max = 1000;
3076 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3078 rlp.rlim_cur = rlp.rlim_max = 256;
3079 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3080 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3087 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3089 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3091 rlp.rlim_cur = rlp.rlim_max = 0;
3094 #ifdef RLIM_INFINITY
3095 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3097 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3099 if (rlp.rlim_cur < 1000)
3101 rlp.rlim_cur = rlp.rlim_max = 1000;
3103 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3104 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3110 /* Exim is normally entered as root (but some special configurations are
3111 possible that don't do this). However, it always spins off sub-processes that
3112 set their uid and gid as required for local delivery. We don't want to pass on
3113 any extra groups that root may belong to, so we want to get rid of them all at
3116 We need to obey setgroups() at this stage, before possibly giving up root
3117 privilege for a changed configuration file, but later on we might need to
3118 check on the additional groups for the admin user privilege - can't do that
3119 till after reading the config, which might specify the exim gid. Therefore,
3120 save the group list here first. */
3122 group_count = getgroups(NGROUPS_MAX, group_list);
3124 /* There is a fundamental difference in some BSD systems in the matter of
3125 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3126 known not to be different. On the "different" systems there is a single group
3127 list, and the first entry in it is the current group. On all other versions of
3128 Unix there is a supplementary group list, which is in *addition* to the current
3129 group. Consequently, to get rid of all extraneous groups on a "standard" system
3130 you pass over 0 groups to setgroups(), while on a "different" system you pass
3131 over a single group - the current group, which is always the first group in the
3132 list. Calling setgroups() with zero groups on a "different" system results in
3133 an error return. The following code should cope with both types of system.
3135 However, if this process isn't running as root, setgroups() can't be used
3136 since you have to be root to run it, even if throwing away groups. Not being
3137 root here happens only in some unusual configurations. We just ignore the
3140 if (setgroups(0, NULL) != 0)
3142 if (setgroups(1, group_list) != 0 && !unprivileged)
3144 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3149 /* If the configuration file name has been altered by an argument on the
3150 command line (either a new file name or a macro definition) and the caller is
3151 not root or the exim user, or if this is a filter testing run, remove any
3152 setuid privilege the program has, and run as the underlying user.
3154 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3155 severely restricts the use of -C for some purposes.
3157 Otherwise, set the real ids to the effective values (should be root unless run
3158 from inetd, which it can either be root or the exim uid, if one is configured).
3160 There is a private mechanism for bypassing some of this, in order to make it
3161 possible to test lots of configurations automatically, without having either to
3162 recompile each time, or to patch in an actual configuration file name and other
3163 values (such as the path name). If running in the test harness, pretend that
3164 configuration file changes and macro definitions haven't happened. */
3167 (config_changed || macros != NULL) && /* Config changed, and */
3168 real_uid != root_uid && /* Not root, and */
3169 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3170 real_uid != exim_uid && /* Not exim, and */
3172 !running_in_test_harness /* Not fudged */
3174 expansion_test /* expansion testing */
3176 filter_test != FTEST_NONE) /* Filter testing */
3178 setgroups(group_count, group_list);
3179 exim_setugid(real_uid, real_gid, FALSE,
3180 US"-C, -D, -be or -bf forces real uid");
3181 removed_privilege = TRUE;
3183 /* In the normal case when Exim is called like this, stderr is available
3184 and should be used for any logging information because attempts to write
3185 to the log will usually fail. To arrange this, we unset really_exim. However,
3186 if no stderr is available there is no point - we might as well have a go
3187 at the log (if it fails, syslog will be written). */
3189 if (log_stderr != NULL) really_exim = FALSE;
3192 /* Privilege is to be retained for the moment. It may be dropped later,
3193 depending on the job that this Exim process has been asked to do. For now, set
3194 the real uid to the effective so that subsequent re-execs of Exim are done by a
3197 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3199 /* If testing a filter, open the file(s) now, before wasting time doing other
3200 setups and reading the message. */
3202 if ((filter_test & FTEST_SYSTEM) != 0)
3204 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3207 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3209 return EXIT_FAILURE;
3213 if ((filter_test & FTEST_USER) != 0)
3215 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3218 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3220 return EXIT_FAILURE;
3224 /* Read the main runtime configuration data; this gives up if there
3225 is a failure. It leaves the configuration file open so that the subsequent
3226 configuration data for delivery can be read if needed. */
3230 /* Handle the decoding of logging options. */
3232 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3233 log_options, log_options_count, US"log");
3237 debug_printf("configuration file is %s\n", config_main_filename);
3238 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3239 log_extra_selector);
3242 /* If domain literals are not allowed, check the sender address that was
3243 supplied with -f. Ditto for a stripped trailing dot. */
3245 if (sender_address != NULL)
3247 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3249 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3250 "allowed\n", sender_address);
3251 return EXIT_FAILURE;
3253 if (f_end_dot && !strip_trailing_dot)
3255 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3256 "(trailing dot not allowed)\n", sender_address);
3257 return EXIT_FAILURE;
3261 /* Paranoia check of maximum lengths of certain strings. There is a check
3262 on the length of the log file path in log.c, which will come into effect
3263 if there are any calls to write the log earlier than this. However, if we
3264 get this far but the string is very long, it is better to stop now than to
3265 carry on and (e.g.) receive a message and then have to collapse. The call to
3266 log_write() from here will cause the ultimate panic collapse if the complete
3267 file name exceeds the buffer length. */
3269 if (Ustrlen(log_file_path) > 200)
3270 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3271 "log_file_path is longer than 200 chars: aborting");
3273 if (Ustrlen(pid_file_path) > 200)
3274 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3275 "pid_file_path is longer than 200 chars: aborting");
3277 if (Ustrlen(spool_directory) > 200)
3278 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3279 "spool_directory is longer than 200 chars: aborting");
3281 /* Length check on the process name given to syslog for its TAG field,
3282 which is only permitted to be 32 characters or less. See RFC 3164. */
3284 if (Ustrlen(syslog_processname) > 32)
3285 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3286 "syslog_processname is longer than 32 chars: aborting");
3288 /* In some operating systems, the environment variable TMPDIR controls where
3289 temporary files are created; Exim doesn't use these (apart from when delivering
3290 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3291 If TMPDIR is found in the environment, reset it to the value defined in the
3292 TMPDIR macro, if this macro is defined. */
3297 for (p = USS environ; *p != NULL; p++)
3299 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3300 Ustrcmp(*p+7, TMPDIR) != 0)
3302 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3303 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3305 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3311 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3312 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3313 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3314 called by a user who has set the TZ variable. This then affects the timestamps
3315 in log files and in Received: headers, and any created Date: header lines. The
3316 required timezone is settable in the configuration file, so nothing can be done
3317 about this earlier - but hopefully nothing will normally be logged earlier than
3318 this. We have to make a new environment if TZ is wrong, but don't bother if
3319 timestamps_utc is set, because then all times are in UTC anyway. */
3321 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3323 timestamps_utc = TRUE;
3327 uschar *envtz = US getenv("TZ");
3328 if ((envtz == NULL && timezone_string != NULL) ||
3330 (timezone_string == NULL ||
3331 Ustrcmp(timezone_string, envtz) != 0)))
3333 uschar **p = USS environ;
3337 while (*p++ != NULL) count++;
3338 if (envtz == NULL) count++;
3339 newp = new = malloc(sizeof(uschar *) * (count + 1));
3340 for (p = USS environ; *p != NULL; p++)
3342 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3345 if (timezone_string != NULL)
3347 *newp = malloc(Ustrlen(timezone_string) + 4);
3348 sprintf(CS *newp++, "TZ=%s", timezone_string);
3353 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3354 tod_stamp(tod_log));
3358 /* Handle the case when we have removed the setuid privilege because of -C or
3359 -D. This means that the caller of Exim was not root, and, provided that
3360 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3363 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3364 were running as the exim user defined in the configuration file (different to
3365 the one in the binary). The sysadmin may expect this case to retain privilege
3366 because "the binary was called by the Exim user", but it hasn't, because of the
3367 order in which it handles this stuff. There are two possibilities:
3369 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3370 to do message deliveries. Thus, the fact that it is running as a
3371 non-privileged user is plausible, and might be wanted in some special
3372 configurations. However, really_exim will have been set false when
3373 privilege was dropped, to stop Exim trying to write to its normal log
3374 files. Therefore, re-enable normal log processing, assuming the sysadmin
3375 has set up the log directory correctly.
3377 (2) If deliver_drop_privilege is not set, the configuration won't work as
3378 apparently intended, and so we log a panic message. In order to retain
3379 root for -C or -D, the caller must either be root or the Exim user
3380 defined in the binary (when deliver_drop_ privilege is false).
3382 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3383 built-in exim user or one defined in the configuration. In either event,
3384 re-enable log processing, assuming the sysadmin knows what they are doing. */
3386 if (removed_privilege && (config_changed || macros != NULL) &&
3387 real_uid == exim_uid)
3389 #ifdef ALT_CONFIG_ROOT_ONLY
3390 really_exim = TRUE; /* let logging work normally */
3393 if (deliver_drop_privilege)
3394 really_exim = TRUE; /* let logging work normally */
3396 log_write(0, LOG_MAIN|LOG_PANIC,
3397 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3398 (int)exim_uid, config_changed? "-C" : "-D");
3402 /* Start up Perl interpreter if Perl support is configured and there is a
3403 perl_startup option, and the configuration or the command line specifies
3404 initializing starting. Note that the global variables are actually called
3405 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3408 if (perl_start_option != 0)
3409 opt_perl_at_start = (perl_start_option > 0);
3410 if (opt_perl_at_start && opt_perl_startup != NULL)
3413 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3414 errstr = init_perl(opt_perl_startup);
3417 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3418 return EXIT_FAILURE;
3420 opt_perl_started = TRUE;
3422 #endif /* EXIM_PERL */
3424 /* Log the arguments of the call if the configuration file said so. This is
3425 a debugging feature for finding out what arguments certain MUAs actually use.
3426 Don't attempt it if logging is disabled, or if listing variables or if
3427 verifying/testing addresses or expansions. */
3429 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3430 && really_exim && !list_options && !checking)
3433 uschar *p = big_buffer;
3435 (void)getcwd(CS p+4, big_buffer_size - 4);
3437 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3439 for (i = 0; i < argc; i++)
3441 int len = Ustrlen(argv[i]);
3444 if (p + len + 8 >= big_buffer + big_buffer_size)
3447 log_write(0, LOG_MAIN, "%s", big_buffer);
3448 Ustrcpy(big_buffer, "...");
3451 printing = string_printing(argv[i]);
3452 if (printing[0] == 0) quote = US"\""; else
3454 uschar *pp = printing;
3456 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3458 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3459 (p - big_buffer) - 4), printing, quote);
3463 if ((log_extra_selector & LX_arguments) != 0)
3464 log_write(0, LOG_MAIN, "%s", big_buffer);
3466 debug_printf("%s\n", big_buffer);
3469 /* Set the working directory to be the top-level spool directory. We don't rely
3470 on this in the code, which always uses fully qualified names, but it's useful
3471 for core dumps etc. Don't complain if it fails - the spool directory might not
3472 be generally accessible and calls with the -C option (and others) have lost
3473 privilege by now. Before the chdir, we try to ensure that the directory exists.
3476 if (Uchdir(spool_directory) != 0)
3478 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3479 (void)Uchdir(spool_directory);
3482 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3483 alias file. Exim doesn't have such a concept, but this call is screwed into
3484 Sun's YP makefiles. Handle this by calling a configured script, as the real
3485 user who called Exim. The -oA option can be used to pass an argument to the
3490 (void)fclose(config_file);
3491 if (bi_command != NULL)
3495 argv[i++] = bi_command;
3496 if (alias_arg != NULL) argv[i++] = alias_arg;
3499 setgroups(group_count, group_list);
3500 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3502 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3503 (argv[1] == NULL)? US"" : argv[1]);
3505 execv(CS argv[0], (char *const *)argv);
3506 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3511 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3516 /* If an action on specific messages is requested, or if a daemon or queue
3517 runner is being started, we need to know if Exim was called by an admin user.
3518 This is the case if the real user is root or exim, or if the real group is
3519 exim, or if one of the supplementary groups is exim or a group listed in
3520 admin_groups. We don't fail all message actions immediately if not admin_user,
3521 since some actions can be performed by non-admin users. Instead, set admin_user
3522 for later interrogation. */
3524 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3529 for (i = 0; i < group_count; i++)
3531 if (group_list[i] == exim_gid) admin_user = TRUE;
3532 else if (admin_groups != NULL)
3534 for (j = 1; j <= (int)(admin_groups[0]); j++)
3535 if (admin_groups[j] == group_list[i])
3536 { admin_user = TRUE; break; }
3538 if (admin_user) break;
3542 /* Another group of privileged users are the trusted users. These are root,
3543 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3544 are permitted to specify sender_addresses with -f on the command line, and
3545 other message parameters as well. */
3547 if (real_uid == root_uid || real_uid == exim_uid)
3548 trusted_caller = TRUE;
3553 if (trusted_users != NULL)
3555 for (i = 1; i <= (int)(trusted_users[0]); i++)
3556 if (trusted_users[i] == real_uid)
3557 { trusted_caller = TRUE; break; }
3560 if (!trusted_caller && trusted_groups != NULL)
3562 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3564 if (trusted_groups[i] == real_gid)
3565 trusted_caller = TRUE;
3566 else for (j = 0; j < group_count; j++)
3568 if (trusted_groups[i] == group_list[j])
3569 { trusted_caller = TRUE; break; }
3571 if (trusted_caller) break;
3576 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3577 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3579 /* Only an admin user may start the daemon or force a queue run in the default
3580 configuration, but the queue run restriction can be relaxed. Only an admin
3581 user may request that a message be returned to its sender forthwith. Only an
3582 admin user may specify a debug level greater than D_v (because it might show
3583 passwords, etc. in lookup queries). Only an admin user may request a queue
3588 BOOL debugset = (debug_selector & ~D_v) != 0;
3589 if (deliver_give_up || daemon_listen ||
3590 (count_queue && queue_list_requires_admin) ||
3591 (list_queue && queue_list_requires_admin) ||
3592 (queue_interval >= 0 && prod_requires_admin) ||
3593 (debugset && !running_in_test_harness))
3595 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3600 /* If the real user is not root or the exim uid, the argument for passing
3601 in an open TCP/IP connection for another message is not permitted, nor is
3602 running with the -N option for any delivery action, unless this call to exim is
3603 one that supplied an input message, or we are using a patched exim for
3604 regression testing. */
3606 if (real_uid != root_uid && real_uid != exim_uid &&
3607 (continue_hostname != NULL ||
3609 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3610 )) && !running_in_test_harness)
3612 fprintf(stderr, "exim: Permission denied\n");
3613 return EXIT_FAILURE;
3616 /* If the caller is not trusted, certain arguments are ignored when running for
3617 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3618 Note that authority for performing certain actions on messages is tested in the
3619 queue_action() function. */
3621 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3623 sender_host_name = sender_host_address = interface_address =
3624 sender_ident = received_protocol = NULL;
3625 sender_host_port = interface_port = 0;
3626 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3629 /* If a sender host address is set, extract the optional port number off the
3630 end of it and check its syntax. Do the same thing for the interface address.
3631 Exim exits if the syntax is bad. */
3635 if (sender_host_address != NULL)
3636 sender_host_port = check_port(sender_host_address);
3637 if (interface_address != NULL)
3638 interface_port = check_port(interface_address);
3641 /* If an SMTP message is being received check to see if the standard input is a
3642 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3643 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3648 union sockaddr_46 inetd_sock;
3649 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3650 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3652 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3653 if (family == AF_INET || family == AF_INET6)
3655 union sockaddr_46 interface_sock;
3656 size = sizeof(interface_sock);
3658 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3659 interface_address = host_ntoa(-1, &interface_sock, NULL,
3662 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3664 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3667 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3668 NULL, &sender_host_port);
3669 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3670 "inetd is not supported when mua_wrapper is set");
3675 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3676 return EXIT_FAILURE;
3682 /* If the load average is going to be needed while receiving a message, get it
3683 now for those OS that require the first call to os_getloadavg() to be done as
3684 root. There will be further calls later for each message received. */
3686 #ifdef LOAD_AVG_NEEDS_ROOT
3687 if (receiving_message &&
3688 (queue_only_load >= 0 ||
3689 (is_inetd && smtp_load_reserve >= 0)
3692 load_average = OS_GETLOADAVG();
3696 /* The queue_only configuration option can be overridden by -odx on the command
3697 line, except that if queue_only_override is false, queue_only cannot be unset
3698 from the command line. */
3700 if (queue_only_set && (queue_only_override || arg_queue_only))
3701 queue_only = arg_queue_only;
3703 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3706 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3707 if (arg_smtp_receive_timeout >= 0)
3708 smtp_receive_timeout = arg_smtp_receive_timeout;
3710 /* If Exim was started with root privilege, unless we have already removed the
3711 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3712 except when starting the daemon or doing some kind of delivery or address
3713 testing (-bt). These are the only cases when root need to be retained. We run
3714 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3715 retained only for starting the daemon. We always do the initgroups() in this
3716 situation (controlled by the TRUE below), in order to be as close as possible
3717 to the state Exim usually runs in. */
3719 if (!unprivileged && /* originally had root AND */
3720 !removed_privilege && /* still got root AND */
3721 !daemon_listen && /* not starting the daemon */
3722 queue_interval <= 0 && /* (either kind of daemon) */
3724 deliver_drop_privilege || /* requested unprivileged */
3726 queue_interval < 0 && /* not running the queue */
3727 (msg_action_arg < 0 || /* and */
3728 msg_action != MSG_DELIVER) && /* not delivering and */
3729 (!checking || !address_test_mode) /* not address checking */
3733 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3736 /* When we are retaining a privileged uid, we still change to the exim gid. */
3738 else setgid(exim_gid);
3740 /* Handle a request to list the delivery queue */
3744 set_process_info("listing the queue");
3745 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3749 /* Handle a request to count the delivery queue */
3753 set_process_info("counting the queue");
3758 /* Handle actions on specific messages, except for the force delivery and
3759 message load actions, which are done below. Some actions take a whole list of
3760 message ids, which are known to continue up to the end of the arguments. Others
3761 take a single message id and then operate on the recipients list. */
3763 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3765 int yield = EXIT_SUCCESS;
3766 set_process_info("acting on specified messages");
3768 if (!one_msg_action)
3770 for (i = msg_action_arg; i < argc; i++)
3771 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3772 yield = EXIT_FAILURE;
3775 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3776 recipients_arg)) yield = EXIT_FAILURE;
3780 /* All the modes below here require the remaining configuration sections
3781 to be read, except that we can skip over the ACL setting when delivering
3782 specific messages, or doing a queue run. (For various testing cases we could
3783 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3786 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3788 /* The configuration data will have been read into POOL_PERM because we won't
3789 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3790 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3791 configuration were read into POOL_MAIN, because we don't do any resets till
3792 later on. However, it seems right, and it does ensure that both pools get used.
3795 store_pool = POOL_MAIN;
3797 /* Handle the -brt option. This is for checking out retry configurations.
3798 The next three arguments are a domain name or a complete address, and
3799 optionally two error numbers. All it does is to call the function that
3800 scans the retry configuration data. */
3802 if (test_retry_arg >= 0)
3804 retry_config *yield;
3805 int basic_errno = 0;
3809 if (test_retry_arg >= argc)
3811 printf("-brt needs a domain or address argument\n");
3812 exim_exit(EXIT_FAILURE);
3814 s1 = argv[test_retry_arg++];
3817 /* If the first argument contains no @ and no . it might be a local user
3818 or it might be a single-component name. Treat as a domain. */
3820 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3822 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3823 "being \ntreated as a one-component domain, not as a local part.\n\n",
3827 /* There may be an optional second domain arg. */
3829 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3830 s2 = argv[test_retry_arg++];
3832 /* The final arg is an error name */
3834 if (test_retry_arg < argc)
3836 uschar *ss = argv[test_retry_arg];
3838 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3841 printf("%s\n", CS error);
3842 return EXIT_FAILURE;
3845 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3846 code > 100 as an error is for matching codes to the decade. Turn them into
3847 a real error code, off the decade. */
3849 if (basic_errno == ERRNO_MAIL4XX ||
3850 basic_errno == ERRNO_RCPT4XX ||
3851 basic_errno == ERRNO_DATA4XX)
3853 int code = (more_errno >> 8) & 255;
3855 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3856 else if (code > 100)
3857 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3861 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3862 if (yield == NULL) printf("No retry information found\n"); else
3865 more_errno = yield->more_errno;
3866 printf("Retry rule: %s ", yield->pattern);
3868 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3870 printf("quota%s%s ",
3871 (more_errno > 0)? "_" : "",
3872 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3874 else if (yield->basic_errno == ECONNREFUSED)
3876 printf("refused%s%s ",
3877 (more_errno > 0)? "_" : "",
3878 (more_errno == 'M')? "MX" :
3879 (more_errno == 'A')? "A" : "");
3881 else if (yield->basic_errno == ETIMEDOUT)
3884 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3886 if (more_errno != 0) printf("_%s",
3887 (more_errno == 'M')? "MX" : "A");
3890 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3891 printf("auth_failed ");
3894 for (r = yield->rules; r != NULL; r = r->next)
3896 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3897 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3903 printf(",%d.", x/1000);
3917 exim_exit(EXIT_SUCCESS);
3920 /* Handle a request to list one or more configuration options */
3924 set_process_info("listing variables");
3925 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3926 else for (i = recipients_arg; i < argc; i++)
3929 (Ustrcmp(argv[i], "router") == 0 ||
3930 Ustrcmp(argv[i], "transport") == 0 ||
3931 Ustrcmp(argv[i], "authenticator") == 0))
3933 readconf_print(argv[i+1], argv[i]);
3936 else readconf_print(argv[i], NULL);
3938 exim_exit(EXIT_SUCCESS);
3942 /* Handle a request to deliver one or more messages that are already on the
3943 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3944 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3946 Delivery of specific messages is typically used for a small number when
3947 prodding by hand (when the option forced_delivery will be set) or when
3948 re-execing to regain root privilege. Each message delivery must happen in a
3949 separate process, so we fork a process for each one, and run them sequentially
3950 so that debugging output doesn't get intertwined, and to avoid spawning too
3951 many processes if a long list is given. However, don't fork for the last one;
3952 this saves a process in the common case when Exim is called to deliver just one
3955 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
3957 if (prod_requires_admin && !admin_user)
3959 fprintf(stderr, "exim: Permission denied\n");
3960 exim_exit(EXIT_FAILURE);
3962 set_process_info("delivering specified messages");
3963 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3964 for (i = msg_action_arg; i < argc; i++)
3969 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3970 else if ((pid = fork()) == 0)
3972 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3973 _exit(EXIT_SUCCESS);
3977 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3979 exim_exit(EXIT_FAILURE);
3983 exim_exit(EXIT_SUCCESS);
3987 /* If only a single queue run is requested, without SMTP listening, we can just
3988 turn into a queue runner, with an optional starting message id. */
3990 if (queue_interval == 0 && !daemon_listen)
3992 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3993 (start_queue_run_id == NULL)? US"" : US" starting at ",
3994 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3995 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3996 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3997 set_process_info("running the queue (single queue run)");
3998 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3999 exim_exit(EXIT_SUCCESS);
4003 /* Find the login name of the real user running this process. This is always
4004 needed when receiving a message, because it is written into the spool file. It
4005 may also be used to construct a from: or a sender: header, and in this case we
4006 need the user's full name as well, so save a copy of it, checked for RFC822
4007 syntax and munged if necessary, if it hasn't previously been set by the -F
4008 argument. We may try to get the passwd entry more than once, in case NIS or
4009 other delays are in evidence. Save the home directory for use in filter testing
4014 if ((pw = getpwuid(real_uid)) != NULL)
4016 originator_login = string_copy(US pw->pw_name);
4017 originator_home = string_copy(US pw->pw_dir);
4019 /* If user name has not been set by -F, set it from the passwd entry
4020 unless -f has been used to set the sender address by a trusted user. */
4022 if (originator_name == NULL)
4024 if (sender_address == NULL ||
4025 (!trusted_caller && filter_test == FTEST_NONE))
4027 uschar *name = US pw->pw_gecos;
4028 uschar *amp = Ustrchr(name, '&');
4031 /* Most Unix specify that a '&' character in the gecos field is
4032 replaced by a copy of the login name, and some even specify that
4033 the first character should be upper cased, so that's what we do. */
4038 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4039 amp - name, name, &loffset, originator_login, amp + 1);
4040 buffer[loffset] = toupper(buffer[loffset]);
4044 /* If a pattern for matching the gecos field was supplied, apply
4045 it and then expand the name string. */
4047 if (gecos_pattern != NULL && gecos_name != NULL)
4050 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4052 if (regex_match_and_setup(re, name, 0, -1))
4054 uschar *new_name = expand_string(gecos_name);
4056 if (new_name != NULL)
4058 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4059 "gecos field \"%s\"\n", new_name, name);
4062 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4063 "\"%s\": %s\n", gecos_name, expand_string_message);
4065 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4066 "gecos field \"%s\"\n", gecos_pattern, name);
4067 store_free((void *)re);
4069 originator_name = string_copy(name);
4072 /* A trusted caller has used -f but not -F */
4074 else originator_name = US"";
4077 /* Break the retry loop */
4082 if (++i > finduser_retries) break;
4086 /* If we cannot get a user login, log the incident and give up, unless the
4087 configuration specifies something to use. When running in the test harness,
4088 any setting of unknown_login overrides the actual name. */
4090 if (originator_login == NULL || running_in_test_harness)
4092 if (unknown_login != NULL)
4094 originator_login = expand_string(unknown_login);
4095 if (originator_name == NULL && unknown_username != NULL)
4096 originator_name = expand_string(unknown_username);
4097 if (originator_name == NULL) originator_name = US"";
4099 if (originator_login == NULL)
4100 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4104 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4107 originator_name = string_copy(parse_fix_phrase(originator_name,
4108 Ustrlen(originator_name), big_buffer, big_buffer_size));
4110 /* If a message is created by this call of Exim, the uid/gid of its originator
4111 are those of the caller. These values are overridden if an existing message is
4112 read in from the spool. */
4114 originator_uid = real_uid;
4115 originator_gid = real_gid;
4117 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4118 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4120 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4121 returns. We leave this till here so that the originator_ fields are available
4122 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4125 if (daemon_listen || queue_interval > 0)
4129 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4130 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4131 "mua_wrapper is set");
4136 /* If the sender ident has not been set (by a trusted caller) set it to
4137 the caller. This will get overwritten below for an inetd call. If a trusted
4138 caller has set it empty, unset it. */
4140 if (sender_ident == NULL) sender_ident = originator_login;
4141 else if (sender_ident[0] == 0) sender_ident = NULL;
4143 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4144 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4145 originator_* variables set. */
4147 if (test_rewrite_arg >= 0)
4149 really_exim = FALSE;
4150 if (test_rewrite_arg >= argc)
4152 printf("-brw needs an address argument\n");
4153 exim_exit(EXIT_FAILURE);
4155 rewrite_test(argv[test_rewrite_arg]);
4156 exim_exit(EXIT_SUCCESS);
4159 /* A locally-supplied message is considered to be coming from a local user
4160 unless a trusted caller supplies a sender address with -f, or is passing in the
4161 message via SMTP (inetd invocation or otherwise). */
4163 if ((sender_address == NULL && !smtp_input) ||
4164 (!trusted_caller && filter_test == FTEST_NONE))
4166 sender_local = TRUE;
4168 /* A trusted caller can supply authenticated_sender and authenticated_id
4169 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4170 defaults except when host checking. */
4172 if (authenticated_sender == NULL && !host_checking)
4173 authenticated_sender = string_sprintf("%s@%s", originator_login,
4174 qualify_domain_sender);
4175 if (authenticated_id == NULL && !host_checking)
4176 authenticated_id = originator_login;
4179 /* Trusted callers are always permitted to specify the sender address.
4180 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4181 is specified is the empty address. However, if a trusted caller does not
4182 specify a sender address for SMTP input, we leave sender_address unset. This
4183 causes the MAIL commands to be honoured. */
4185 if ((!smtp_input && sender_address == NULL) ||
4186 !receive_check_set_sender(sender_address))
4188 /* Either the caller is not permitted to set a general sender, or this is
4189 non-SMTP input and the trusted caller has not set a sender. If there is no
4190 sender, or if a sender other than <> is set, override with the originator's
4191 login (which will get qualified below), except when checking things. */
4193 if (sender_address == NULL /* No sender_address set */
4195 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4196 !checking && /* Not running tests, AND */
4197 filter_test == FTEST_NONE)) /* Not testing a filter */
4199 sender_address = originator_login;
4200 sender_address_forced = FALSE;
4201 sender_address_domain = 0;
4205 /* Remember whether an untrusted caller set the sender address */
4207 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4209 /* Ensure that the sender address is fully qualified unless it is the empty
4210 address, which indicates an error message, or doesn't exist (root caller, smtp
4211 interface, no -f argument). */
4213 if (sender_address != NULL && sender_address[0] != 0 &&
4214 sender_address_domain == 0)
4215 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4216 qualify_domain_sender);
4218 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4220 /* Handle a request to verify a list of addresses, or test them for delivery.
4221 This must follow the setting of the sender address, since routers can be
4222 predicated upon the sender. If no arguments are given, read addresses from
4223 stdin. Set debug_level to at least D_v to get full output for address testing.
4226 if (verify_address_mode || address_test_mode)
4229 int flags = vopt_qualify;
4231 if (verify_address_mode)
4233 if (!verify_as_sender) flags |= vopt_is_recipient;
4234 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4239 flags |= vopt_is_recipient;
4240 debug_selector |= D_v;
4241 debug_file = stderr;
4242 debug_fd = fileno(debug_file);
4243 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4246 if (recipients_arg < argc)
4248 while (recipients_arg < argc)
4250 uschar *s = argv[recipients_arg++];
4253 BOOL finished = FALSE;
4254 uschar *ss = parse_find_address_end(s, FALSE);
4255 if (*ss == ',') *ss = 0; else finished = TRUE;
4256 test_address(s, flags, &exit_value);
4259 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4266 uschar *s = get_stdinput(NULL, NULL);
4267 if (s == NULL) break;
4268 test_address(s, flags, &exit_value);
4272 exim_exit(exit_value);
4275 /* Handle expansion checking. Either expand items on the command line, or read
4276 from stdin if there aren't any. If -Mset was specified, load the message so
4277 that its variables can be used, but restrict this facility to admin users.
4278 Otherwise, if -bem was used, read a message from stdin. */
4282 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4284 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4287 fprintf(stderr, "exim: permission denied\n");
4290 message_id = argv[msg_action_arg];
4291 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4292 if (!spool_open_datafile(message_id))
4293 printf ("Failed to load message datafile %s\n", message_id);
4294 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4295 printf ("Failed to load message %s\n", message_id);
4298 /* Read a test message from a file. We fudge it up to be on stdin, saving
4299 stdin itself for later reading of expansion strings. */
4301 else if (expansion_test_message != NULL)
4303 int save_stdin = dup(0);
4304 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4307 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4309 return EXIT_FAILURE;
4312 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4313 message_ended = END_NOTENDED;
4314 read_message_body(receive_msg(extract_recipients));
4315 message_linecount += body_linecount;
4316 (void)dup2(save_stdin, 0);
4317 (void)close(save_stdin);
4318 clearerr(stdin); /* Required by Darwin */
4321 /* Allow $recipients for this testing */
4323 enable_dollar_recipients = TRUE;
4325 /* Expand command line items */
4327 if (recipients_arg < argc)
4329 while (recipients_arg < argc)
4331 uschar *s = argv[recipients_arg++];
4332 uschar *ss = expand_string(s);
4333 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4334 else printf("%s\n", CS ss);
4342 char *(*fn_readline)(char *) = NULL;
4343 char *(*fn_addhist)(char *) = NULL;
4346 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4352 uschar *source = get_stdinput(fn_readline, fn_addhist);
4353 if (source == NULL) break;
4354 ss = expand_string(source);
4356 printf ("Failed: %s\n", expand_string_message);
4357 else printf("%s\n", CS ss);
4361 if (dlhandle != NULL) dlclose(dlhandle);
4365 /* The data file will be open after -Mset */
4367 if (deliver_datafile >= 0)
4369 (void)close(deliver_datafile);
4370 deliver_datafile = -1;
4373 exim_exit(EXIT_SUCCESS);
4377 /* The active host name is normally the primary host name, but it can be varied
4378 for hosts that want to play several parts at once. We need to ensure that it is
4379 set for host checking, and for receiving messages. */
4381 smtp_active_hostname = primary_hostname;
4382 if (raw_active_hostname != NULL)
4384 uschar *nah = expand_string(raw_active_hostname);
4387 if (!expand_string_forcedfail)
4388 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4389 "(smtp_active_hostname): %s", raw_active_hostname,
4390 expand_string_message);
4392 else if (nah[0] != 0) smtp_active_hostname = nah;
4395 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4396 given IP address so that the blocking and relay configuration can be tested.
4397 Unless a sender_ident was set by -oMt, we discard it (the default is the
4398 caller's login name). An RFC 1413 call is made only if we are running in the
4399 test harness and an incoming interface and both ports are specified, because
4400 there is no TCP/IP call to find the ident for. */
4407 if (!sender_ident_set)
4409 sender_ident = NULL;
4410 if (running_in_test_harness && sender_host_port != 0 &&
4411 interface_address != NULL && interface_port != 0)
4412 verify_get_ident(1413);
4415 /* In case the given address is a non-canonical IPv6 address, canonicize
4416 it. The code works for both IPv4 and IPv6, as it happens. */
4418 size = host_aton(sender_host_address, x);
4419 sender_host_address = store_get(48); /* large enough for full IPv6 */
4420 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4422 /* Now set up for testing */
4424 host_build_sender_fullhost();
4428 sender_local = FALSE;
4429 sender_host_notsocket = TRUE;
4430 debug_file = stderr;
4431 debug_fd = fileno(debug_file);
4432 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4433 "**** but without any ident (RFC 1413) callback.\n"
4434 "**** This is not for real!\n\n",
4435 sender_host_address);
4437 if (verify_check_host(&hosts_connection_nolog) == OK)
4438 log_write_selector &= ~L_smtp_connection;
4439 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4441 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4442 because a log line has already been written for all its failure exists
4443 (usually "connection refused: <reason>") and writing another one is
4444 unnecessary clutter. */
4446 if (smtp_start_session())
4448 reset_point = store_get(0);
4451 store_reset(reset_point);
4452 if (smtp_setup_msg() <= 0) break;
4453 if (!receive_msg(FALSE)) break;
4457 exim_exit(EXIT_SUCCESS);
4461 /* Arrange for message reception if recipients or SMTP were specified;
4462 otherwise complain unless a version print (-bV) happened or this is a filter
4463 verification test. In the former case, show the configuration file name. */
4465 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4467 if (version_printed)
4469 printf("Configuration file is %s\n", config_main_filename);
4470 return EXIT_SUCCESS;
4473 if (filter_test == FTEST_NONE)
4474 exim_usage(called_as);
4478 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4479 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4480 that we are not called from inetd, because that is rejected above. The
4481 following configuration settings are forced here:
4483 (1) Synchronous delivery (-odi)
4484 (2) Errors to stderr (-oep == -oeq)
4485 (3) No parallel remote delivery
4486 (4) Unprivileged delivery
4488 We don't force overall queueing options because there are several of them;
4489 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4490 to override any SMTP queueing. */
4494 synchronous_delivery = TRUE;
4495 arg_error_handling = ERRORS_STDERR;
4496 remote_max_parallel = 1;
4497 deliver_drop_privilege = TRUE;
4499 queue_smtp_domains = NULL;
4503 /* Prepare to accept one or more new messages on the standard input. When a
4504 message has been read, its id is returned in message_id[]. If doing immediate
4505 delivery, we fork a delivery process for each received message, except for the
4506 last one, where we can save a process switch.
4508 It is only in non-smtp mode that error_handling is allowed to be changed from
4509 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4510 sendmail error modes other than -oem ever actually used? Later: yes.) */
4512 if (!smtp_input) error_handling = arg_error_handling;
4514 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4515 logging being sent down the socket and make an identd call to get the
4520 (void)fclose(stderr);
4521 exim_nullstd(); /* Re-open to /dev/null */
4522 verify_get_ident(IDENT_PORT);
4523 host_build_sender_fullhost();
4524 set_process_info("handling incoming connection from %s via inetd",
4528 /* If the sender host address has been set, build sender_fullhost if it hasn't
4529 already been done (which it will have been for inetd). This caters for the
4530 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4531 so that the test for IP options is skipped for -bs input. */
4533 if (sender_host_address != NULL && sender_fullhost == NULL)
4535 host_build_sender_fullhost();
4536 set_process_info("handling incoming connection from %s via -oMa",
4538 sender_host_notsocket = TRUE;
4541 /* Otherwise, set the sender host as unknown except for inetd calls. This
4542 prevents host checking in the case of -bs not from inetd and also for -bS. */
4544 else if (!is_inetd) sender_host_unknown = TRUE;
4546 /* If stdout does not exist, then dup stdin to stdout. This can happen
4547 if exim is started from inetd. In this case fd 0 will be set to the socket,
4548 but fd 1 will not be set. This also happens for passed SMTP channels. */
4550 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4552 /* Set up the incoming protocol name and the state of the program. Root is
4553 allowed to force received protocol via the -oMr option above. If we have come
4554 via inetd, the process info has already been set up. We don't set
4555 received_protocol here for smtp input, as it varies according to
4556 batch/HELO/EHLO/AUTH/TLS. */
4560 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4561 smtp_batched_input? "batched " : "",
4562 (sender_address!= NULL)? sender_address : originator_login);
4566 if (received_protocol == NULL)
4567 received_protocol = string_sprintf("local%s", called_as);
4568 set_process_info("accepting a local non-SMTP message from <%s>",
4572 /* Initialize the session_local_queue-only flag (this will be ignored if
4573 mua_wrapper is set) */
4576 session_local_queue_only = queue_only;
4578 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4579 the spool if so configured. On failure, we must not attempt to send an error
4580 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4581 error code is given.) */
4583 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4585 fprintf(stderr, "exim: insufficient disk space\n");
4586 return EXIT_FAILURE;
4589 /* If this is smtp input of any kind, real or batched, handle the start of the
4592 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4593 because a log line has already been written for all its failure exists
4594 (usually "connection refused: <reason>") and writing another one is
4595 unnecessary clutter. */
4601 if (verify_check_host(&hosts_connection_nolog) == OK)
4602 log_write_selector &= ~L_smtp_connection;
4603 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4604 if (!smtp_start_session())
4607 exim_exit(EXIT_SUCCESS);
4611 /* Otherwise, set up the input size limit here. */
4615 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4616 if (expand_string_message != NULL)
4618 if (thismessage_size_limit == -1)
4619 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4620 "message_size_limit: %s", expand_string_message);
4622 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4623 "message_size_limit: %s", expand_string_message);
4627 /* Loop for several messages when reading SMTP input. If we fork any child
4628 processes, we don't want to wait for them unless synchronous delivery is
4629 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4630 same as SIG_DFL, despite the fact that documentation often lists the default as
4631 "ignore". This is a confusing area. This is what I know:
4633 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4634 processes that complete simply to go away without ever becoming defunct. You
4635 can't then wait for them - but we don't want to wait for them in the
4636 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4637 happen for all OS (e.g. *BSD is different).
4639 But that's not the end of the story. Some (many? all?) systems have the
4640 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4641 has by default, so it seems that the difference is merely one of default
4642 (compare restarting vs non-restarting signals).
4644 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4645 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4646 of the loop below. Paranoia rules.
4648 February 2003: That's *still* not the end of the story. There are now versions
4649 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4650 process then calls waitpid(), a grumble is written to the system log, because
4651 this is logically inconsistent. In other words, it doesn't like the paranoia.
4652 As a consequenc of this, the waitpid() below is now excluded if we are sure
4653 that SIG_IGN works. */
4655 if (!synchronous_delivery)
4658 struct sigaction act;
4659 act.sa_handler = SIG_IGN;
4660 sigemptyset(&(act.sa_mask));
4661 act.sa_flags = SA_NOCLDWAIT;
4662 sigaction(SIGCHLD, &act, NULL);
4664 signal(SIGCHLD, SIG_IGN);
4668 /* Save the current store pool point, for resetting at the start of
4669 each message, and save the real sender address, if any. */
4671 reset_point = store_get(0);
4672 real_sender_address = sender_address;
4674 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4675 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4680 store_reset(reset_point);
4683 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4684 input and build the recipients list, before calling receive_msg() to read the
4685 message proper. Whatever sender address is given in the SMTP transaction is
4686 often ignored for local senders - we use the actual sender, which is normally
4687 either the underlying user running this process or a -f argument provided by
4688 a trusted caller. It is saved in real_sender_address. The test for whether to
4689 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4694 if ((rc = smtp_setup_msg()) > 0)
4696 if (real_sender_address != NULL &&
4697 !receive_check_set_sender(sender_address))
4699 sender_address = raw_sender = real_sender_address;
4700 sender_address_unrewritten = NULL;
4703 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4704 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4705 the very end. The result of the ACL is ignored (as for other non-SMTP
4706 messages). It is run for its potential side effects. */
4708 if (smtp_batched_input && acl_not_smtp_start != NULL)
4710 uschar *user_msg, *log_msg;
4711 enable_dollar_recipients = TRUE;
4712 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4713 &user_msg, &log_msg);
4714 enable_dollar_recipients = FALSE;
4717 /* Now get the data for the message */
4719 more = receive_msg(extract_recipients);
4720 if (message_id[0] == 0)
4723 smtp_log_no_mail(); /* Log no mail if configured */
4724 exim_exit(EXIT_FAILURE);
4729 smtp_log_no_mail(); /* Log no mail if configured */
4730 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4734 /* In the non-SMTP case, we have all the information from the command
4735 line, but must process it in case it is in the more general RFC822
4736 format, and in any case, to detect syntax errors. Also, it appears that
4737 the use of comma-separated lists as single arguments is common, so we
4738 had better support them. */
4744 int count = argc - recipients_arg;
4745 uschar **list = argv + recipients_arg;
4747 /* These options cannot be changed dynamically for non-SMTP messages */
4749 active_local_sender_retain = local_sender_retain;
4750 active_local_from_check = local_from_check;
4752 /* Save before any rewriting */
4754 raw_sender = string_copy(sender_address);
4756 /* Loop for each argument */
4758 for (i = 0; i < count; i++)
4760 int start, end, domain;
4762 uschar *s = list[i];
4764 /* Loop for each comma-separated address */
4768 BOOL finished = FALSE;
4770 uschar *ss = parse_find_address_end(s, FALSE);
4772 if (*ss == ',') *ss = 0; else finished = TRUE;
4774 /* Check max recipients - if -t was used, these aren't recipients */
4776 if (recipients_max > 0 && ++rcount > recipients_max &&
4777 !extract_recipients)
4779 if (error_handling == ERRORS_STDERR)
4781 fprintf(stderr, "exim: too many recipients\n");
4782 exim_exit(EXIT_FAILURE);
4787 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4788 errors_sender_rc : EXIT_FAILURE;
4793 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4795 if (domain == 0 && !allow_unqualified_recipient)
4798 errmess = US"unqualified recipient address not allowed";
4801 if (recipient == NULL)
4803 if (error_handling == ERRORS_STDERR)
4805 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4806 string_printing(list[i]), errmess);
4807 exim_exit(EXIT_FAILURE);
4813 eblock.text1 = string_printing(list[i]);
4814 eblock.text2 = errmess;
4816 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4817 errors_sender_rc : EXIT_FAILURE;
4821 receive_add_recipient(recipient, -1);
4824 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4828 /* Show the recipients when debugging */
4833 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4834 if (recipients_list != NULL)
4836 debug_printf("Recipients:\n");
4837 for (i = 0; i < recipients_count; i++)
4838 debug_printf(" %s\n", recipients_list[i].address);
4842 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4843 ignored; rejecting here would just add complication, and it can just as
4844 well be done later. Allow $recipients to be visible in the ACL. */
4846 if (acl_not_smtp_start != NULL)
4848 uschar *user_msg, *log_msg;
4849 enable_dollar_recipients = TRUE;
4850 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4851 &user_msg, &log_msg);
4852 enable_dollar_recipients = FALSE;
4855 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4856 will just read the headers for the message, and not write anything onto the
4859 message_ended = END_NOTENDED;
4860 more = receive_msg(extract_recipients);
4862 /* more is always FALSE here (not SMTP message) when reading a message
4863 for real; when reading the headers of a message for filter testing,
4864 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4866 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4867 } /* Non-SMTP message reception */
4869 /* If this is a filter testing run, there are headers in store, but
4870 no message on the spool. Run the filtering code in testing mode, setting
4871 the domain to the qualify domain and the local part to the current user,
4872 unless they have been set by options. The prefix and suffix are left unset
4873 unless specified. The the return path is set to to the sender unless it has
4874 already been set from a return-path header in the message. */
4876 if (filter_test != FTEST_NONE)
4878 deliver_domain = (ftest_domain != NULL)?
4879 ftest_domain : qualify_domain_recipient;
4880 deliver_domain_orig = deliver_domain;
4881 deliver_localpart = (ftest_localpart != NULL)?
4882 ftest_localpart : originator_login;
4883 deliver_localpart_orig = deliver_localpart;
4884 deliver_localpart_prefix = ftest_prefix;
4885 deliver_localpart_suffix = ftest_suffix;
4886 deliver_home = originator_home;
4888 if (return_path == NULL)
4890 printf("Return-path copied from sender\n");
4891 return_path = string_copy(sender_address);
4895 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4897 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4899 receive_add_recipient(
4900 string_sprintf("%s%s%s@%s",
4901 (ftest_prefix == NULL)? US"" : ftest_prefix,
4903 (ftest_suffix == NULL)? US"" : ftest_suffix,
4904 deliver_domain), -1);
4906 printf("Recipient = %s\n", recipients_list[0].address);
4907 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4908 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4910 (void)chdir("/"); /* Get away from wherever the user is running this from */
4912 /* Now we run either a system filter test, or a user filter test, or both.
4913 In the latter case, headers added by the system filter will persist and be
4914 available to the user filter. We need to copy the filter variables
4917 if ((filter_test & FTEST_SYSTEM) != 0)
4919 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4920 exim_exit(EXIT_FAILURE);
4923 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4925 if ((filter_test & FTEST_USER) != 0)
4927 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4928 exim_exit(EXIT_FAILURE);
4931 exim_exit(EXIT_SUCCESS);
4934 /* Else act on the result of message reception. We should not get here unless
4935 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
4936 will be TRUE. If it is not, check on the number of messages received in this
4939 if (!session_local_queue_only &&
4940 smtp_accept_queue_per_connection > 0 &&
4941 receive_messagecount > smtp_accept_queue_per_connection)
4943 session_local_queue_only = TRUE;
4944 queue_only_reason = 2;
4947 /* Initialize local_queue_only from session_local_queue_only. If it is false,
4948 and queue_only_load is set, check that the load average is below it. If it is
4949 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
4950 default), we put the whole session into queue_only mode. It then remains this
4951 way for any subsequent messages on the same SMTP connection. This is a
4952 deliberate choice; even though the load average may fall, it doesn't seem
4953 right to deliver later messages on the same call when not delivering earlier
4954 ones. However, there are odd cases where this is not wanted, so this can be
4955 changed by setting queue_only_load_latch false. */
4957 local_queue_only = session_local_queue_only;
4958 if (!local_queue_only && queue_only_load >= 0)
4960 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
4961 if (local_queue_only)
4963 queue_only_reason = 3;
4964 if (queue_only_load_latch) session_local_queue_only = TRUE;
4968 /* If running as an MUA wrapper, all queueing options and freezing options
4972 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4974 /* Log the queueing here, when it will get a message id attached, but
4975 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4978 if (local_queue_only) switch(queue_only_reason)
4981 log_write(L_delay_delivery,
4982 LOG_MAIN, "no immediate delivery: more than %d messages "
4983 "received in one connection", smtp_accept_queue_per_connection);
4987 log_write(L_delay_delivery,
4988 LOG_MAIN, "no immediate delivery: load average %.2f",
4989 (double)load_average/1000.0);
4993 /* Else do the delivery unless the ACL or local_scan() called for queue only
4994 or froze the message. Always deliver in a separate process. A fork failure is
4995 not a disaster, as the delivery will eventually happen on a subsequent queue
4996 run. The search cache must be tidied before the fork, as the parent will
4997 do it before exiting. The child will trigger a lookup failure and
4998 thereby defer the delivery if it tries to use (for example) a cached ldap
4999 connection that the parent has called unbind on. */
5001 else if (!queue_only_policy && !deliver_freeze)
5006 if ((pid = fork()) == 0)
5009 close_unwanted(); /* Close unwanted file descriptors and TLS */
5010 exim_nullstd(); /* Ensure std{in,out,err} exist */
5012 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5013 mode, deliver_drop_privilege is forced TRUE). */
5015 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5017 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5019 /* Control does not return here. */
5022 /* No need to re-exec */
5024 rc = deliver_message(message_id, FALSE, FALSE);
5026 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5027 EXIT_SUCCESS : EXIT_FAILURE);
5032 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5033 "process: %s", strerror(errno));
5036 /* In the parent, wait if synchronous delivery is required. This will
5037 always be the case in MUA wrapper mode. */
5039 else if (synchronous_delivery)
5042 while (wait(&status) != pid);
5043 if ((status & 0x00ff) != 0)
5044 log_write(0, LOG_MAIN|LOG_PANIC,
5045 "process %d crashed with signal %d while delivering %s",
5046 (int)pid, status & 0x00ff, message_id);
5047 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5051 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5052 automatically reaps children (see comments above the loop), clear away any
5053 finished subprocesses here, in case there are lots of messages coming in
5054 from the same source. */
5056 #ifndef SIG_IGN_WORKS
5057 while (waitpid(-1, NULL, WNOHANG) > 0);
5061 exim_exit(EXIT_SUCCESS); /* Never returns */
5062 return 0; /* To stop compiler warning */