1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 extern void init_lookup_list(void);
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 * Enums for cmdline interface *
57 *************************************************/
59 enum commandline_info { CMDINFO_NONE=0,
60 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
65 /*************************************************
66 * Compile regular expression and panic on fail *
67 *************************************************/
69 /* This function is called when failure to compile a regular expression leads
70 to a panic exit. In other cases, pcre_compile() is called directly. In many
71 cases where this function is used, the results of the compilation are to be
72 placed in long-lived store, so we temporarily reset the store management
73 functions that PCRE uses if the use_malloc flag is set.
76 pattern the pattern to compile
77 caseless TRUE if caseless matching is required
78 use_malloc TRUE if compile into malloc store
80 Returns: pointer to the compiled pattern
84 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
87 int options = PCRE_COPT;
92 pcre_malloc = function_store_malloc;
93 pcre_free = function_store_free;
95 if (caseless) options |= PCRE_CASELESS;
96 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
97 pcre_malloc = function_store_get;
98 pcre_free = function_dummy_free;
100 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
101 "%s at offset %d while compiling %s", error, offset, pattern);
108 /*************************************************
109 * Execute regular expression and set strings *
110 *************************************************/
112 /* This function runs a regular expression match, and sets up the pointers to
113 the matched substrings.
116 re the compiled expression
117 subject the subject string
118 options additional PCRE options
119 setup if < 0 do full setup
120 if >= 0 setup from setup+1 onwards,
121 excluding the full matched string
123 Returns: TRUE or FALSE
127 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
129 int ovector[3*(EXPAND_MAXN+1)];
130 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
131 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
133 if (n == 0) n = EXPAND_MAXN + 1;
137 expand_nmax = (setup < 0)? 0 : setup + 1;
138 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
140 expand_nstring[expand_nmax] = subject + ovector[nn];
141 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
151 /*************************************************
152 * Set up processing details *
153 *************************************************/
155 /* Save a text string for dumping when SIGUSR1 is received.
156 Do checks for overruns.
158 Arguments: format and arguments, as for printf()
163 set_process_info(const char *format, ...)
167 sprintf(CS process_info, "%5d ", (int)getpid());
168 len = Ustrlen(process_info);
169 va_start(ap, format);
170 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
171 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
172 len = Ustrlen(process_info);
173 process_info[len+0] = '\n';
174 process_info[len+1] = '\0';
175 process_info_len = len + 1;
176 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
183 /*************************************************
184 * Handler for SIGUSR1 *
185 *************************************************/
187 /* SIGUSR1 causes any exim process to write to the process log details of
188 what it is currently doing. It will only be used if the OS is capable of
189 setting up a handler that causes automatic restarting of any system call
190 that is in progress at the time.
192 This function takes care to be signal-safe.
194 Argument: the signal number (SIGUSR1)
199 usr1_handler(int sig)
203 os_restarting_signal(sig, usr1_handler);
205 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
208 /* If we are already running as the Exim user, try to create it in the
209 current process (assuming spool_directory exists). Otherwise, if we are
210 root, do the creation in an exim:exim subprocess. */
212 int euid = geteuid();
213 if (euid == exim_uid)
214 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
215 else if (euid == root_uid)
216 fd = log_create_as_exim(process_log_path);
219 /* If we are neither exim nor root, or if we failed to create the log file,
220 give up. There is not much useful we can do with errors, since we don't want
221 to disrupt whatever is going on outside the signal handler. */
225 {int dummy = write(fd, process_info, process_info_len); dummy = dummy; }
231 /*************************************************
233 *************************************************/
235 /* This handler is enabled most of the time that Exim is running. The handler
236 doesn't actually get used unless alarm() has been called to set a timer, to
237 place a time limit on a system call of some kind. When the handler is run, it
240 There are some other SIGALRM handlers that are used in special cases when more
241 than just a flag setting is required; for example, when reading a message's
242 input. These are normally set up in the code module that uses them, and the
243 SIGALRM handler is reset to this one afterwards.
245 Argument: the signal value (SIGALRM)
250 sigalrm_handler(int sig)
252 sig = sig; /* Keep picky compilers happy */
254 os_non_restarting_signal(SIGALRM, sigalrm_handler);
259 /*************************************************
260 * Sleep for a fractional time interval *
261 *************************************************/
263 /* This function is called by millisleep() and exim_wait_tick() to wait for a
264 period of time that may include a fraction of a second. The coding is somewhat
265 tedious. We do not expect setitimer() ever to fail, but if it does, the process
266 will wait for ever, so we panic in this instance. (There was a case of this
267 when a bug in a function that calls milliwait() caused it to pass invalid data.
268 That's when I added the check. :-)
270 Argument: an itimerval structure containing the interval
275 milliwait(struct itimerval *itval)
278 sigset_t old_sigmask;
279 (void)sigemptyset(&sigmask); /* Empty mask */
280 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
281 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
282 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
283 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
284 "setitimer() failed: %s", strerror(errno));
285 (void)sigfillset(&sigmask); /* All signals */
286 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
287 (void)sigsuspend(&sigmask); /* Until SIGALRM */
288 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
294 /*************************************************
295 * Millisecond sleep function *
296 *************************************************/
298 /* The basic sleep() function has a granularity of 1 second, which is too rough
299 in some cases - for example, when using an increasing delay to slow down
302 Argument: number of millseconds
309 struct itimerval itval;
310 itval.it_interval.tv_sec = 0;
311 itval.it_interval.tv_usec = 0;
312 itval.it_value.tv_sec = msec/1000;
313 itval.it_value.tv_usec = (msec % 1000) * 1000;
319 /*************************************************
320 * Compare microsecond times *
321 *************************************************/
328 Returns: -1, 0, or +1
332 exim_tvcmp(struct timeval *t1, struct timeval *t2)
334 if (t1->tv_sec > t2->tv_sec) return +1;
335 if (t1->tv_sec < t2->tv_sec) return -1;
336 if (t1->tv_usec > t2->tv_usec) return +1;
337 if (t1->tv_usec < t2->tv_usec) return -1;
344 /*************************************************
345 * Clock tick wait function *
346 *************************************************/
348 /* Exim uses a time + a pid to generate a unique identifier in two places: its
349 message IDs, and in file names for maildir deliveries. Because some OS now
350 re-use pids within the same second, sub-second times are now being used.
351 However, for absolute certaintly, we must ensure the clock has ticked before
352 allowing the relevant process to complete. At the time of implementation of
353 this code (February 2003), the speed of processors is such that the clock will
354 invariably have ticked already by the time a process has done its job. This
355 function prepares for the time when things are faster - and it also copes with
356 clocks that go backwards.
359 then_tv A timeval which was used to create uniqueness; its usec field
360 has been rounded down to the value of the resolution.
361 We want to be sure the current time is greater than this.
362 resolution The resolution that was used to divide the microseconds
363 (1 for maildir, larger for message ids)
369 exim_wait_tick(struct timeval *then_tv, int resolution)
371 struct timeval now_tv;
372 long int now_true_usec;
374 (void)gettimeofday(&now_tv, NULL);
375 now_true_usec = now_tv.tv_usec;
376 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
378 if (exim_tvcmp(&now_tv, then_tv) <= 0)
380 struct itimerval itval;
381 itval.it_interval.tv_sec = 0;
382 itval.it_interval.tv_usec = 0;
383 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
384 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
386 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
387 negative value for the microseconds is possible only in the case when "now"
388 is more than a second less than "then". That means that itval.it_value.tv_sec
389 is greater than zero. The following correction is therefore safe. */
391 if (itval.it_value.tv_usec < 0)
393 itval.it_value.tv_usec += 1000000;
394 itval.it_value.tv_sec -= 1;
397 DEBUG(D_transport|D_receive)
399 if (!running_in_test_harness)
401 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
402 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
403 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
404 itval.it_value.tv_usec);
415 /*************************************************
416 * Call fopen() with umask 777 and adjust mode *
417 *************************************************/
419 /* Exim runs with umask(0) so that files created with open() have the mode that
420 is specified in the open() call. However, there are some files, typically in
421 the spool directory, that are created with fopen(). They end up world-writeable
422 if no precautions are taken. Although the spool directory is not accessible to
423 the world, this is an untidiness. So this is a wrapper function for fopen()
424 that sorts out the mode of the created file.
427 filename the file name
428 options the fopen() options
429 mode the required mode
431 Returns: the fopened FILE or NULL
435 modefopen(const uschar *filename, const char *options, mode_t mode)
437 mode_t saved_umask = umask(0777);
438 FILE *f = Ufopen(filename, options);
439 (void)umask(saved_umask);
440 if (f != NULL) (void)fchmod(fileno(f), mode);
447 /*************************************************
448 * Ensure stdin, stdout, and stderr exist *
449 *************************************************/
451 /* Some operating systems grumble if an exec() happens without a standard
452 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
453 file will be opened and will use these fd values, and then some other bit of
454 code will assume, for example, that it can write error messages to stderr.
455 This function ensures that fds 0, 1, and 2 are open if they do not already
456 exist, by connecting them to /dev/null.
458 This function is also used to ensure that std{in,out,err} exist at all times,
459 so that if any library that Exim calls tries to use them, it doesn't crash.
471 for (i = 0; i <= 2; i++)
473 if (fstat(i, &statbuf) < 0 && errno == EBADF)
475 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
476 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
477 string_open_failed(errno, "/dev/null"));
478 if (devnull != i) (void)dup2(devnull, i);
481 if (devnull > 2) (void)close(devnull);
487 /*************************************************
488 * Close unwanted file descriptors for delivery *
489 *************************************************/
491 /* This function is called from a new process that has been forked to deliver
492 an incoming message, either directly, or using exec.
494 We want any smtp input streams to be closed in this new process. However, it
495 has been observed that using fclose() here causes trouble. When reading in -bS
496 input, duplicate copies of messages have been seen. The files will be sharing a
497 file pointer with the parent process, and it seems that fclose() (at least on
498 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
499 least sometimes. Hence we go for closing the underlying file descriptors.
501 If TLS is active, we want to shut down the TLS library, but without molesting
502 the parent's SSL connection.
504 For delivery of a non-SMTP message, we want to close stdin and stdout (and
505 stderr unless debugging) because the calling process might have set them up as
506 pipes and be waiting for them to close before it waits for the submission
507 process to terminate. If they aren't closed, they hold up the calling process
508 until the initial delivery process finishes, which is not what we want.
510 Exception: We do want it for synchronous delivery!
512 And notwithstanding all the above, if D_resolver is set, implying resolver
513 debugging, leave stdout open, because that's where the resolver writes its
516 When we close stderr (which implies we've also closed stdout), we also get rid
517 of any controlling terminal.
529 tls_close(FALSE, FALSE); /* Shut down the TLS library */
531 (void)close(fileno(smtp_in));
532 (void)close(fileno(smtp_out));
537 (void)close(0); /* stdin */
538 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
539 if (debug_selector == 0) /* stderr */
541 if (!synchronous_delivery)
554 /*************************************************
556 *************************************************/
558 /* This function sets a new uid and gid permanently, optionally calling
559 initgroups() to set auxiliary groups. There are some special cases when running
560 Exim in unprivileged modes. In these situations the effective uid will not be
561 root; if we already have the right effective uid/gid, and don't need to
562 initialize any groups, leave things as they are.
567 igflag TRUE if initgroups() wanted
568 msg text to use in debugging output and failure log
570 Returns: nothing; bombs out on failure
574 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
576 uid_t euid = geteuid();
577 gid_t egid = getegid();
579 if (euid == root_uid || euid != uid || egid != gid || igflag)
581 /* At least one OS returns +1 for initgroups failure, so just check for
586 struct passwd *pw = getpwuid(uid);
589 if (initgroups(pw->pw_name, gid) != 0)
590 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
591 (long int)uid, strerror(errno));
593 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
594 "no passwd entry for uid=%ld", (long int)uid);
597 if (setgid(gid) < 0 || setuid(uid) < 0)
599 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
600 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
604 /* Debugging output included uid/gid and all groups */
608 int group_count, save_errno;
609 gid_t group_list[NGROUPS_MAX];
610 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
611 (long int)geteuid(), (long int)getegid(), (long int)getpid());
612 group_count = getgroups(NGROUPS_MAX, group_list);
614 debug_printf(" auxiliary group list:");
618 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
620 else if (group_count < 0)
621 debug_printf(" <error: %s>", strerror(save_errno));
622 else debug_printf(" <none>");
630 /*************************************************
632 *************************************************/
634 /* Exim exits via this function so that it always clears up any open
640 Returns: does not return
648 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
649 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
656 /*************************************************
657 * Extract port from host address *
658 *************************************************/
660 /* Called to extract the port from the values given to -oMa and -oMi.
661 It also checks the syntax of the address, and terminates it before the
662 port data when a port is extracted.
665 address the address, with possible port on the end
667 Returns: the port, or zero if there isn't one
668 bombs out on a syntax error
672 check_port(uschar *address)
674 int port = host_address_extract_port(address);
675 if (string_is_ip_address(address, NULL) == 0)
677 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
685 /*************************************************
686 * Test/verify an address *
687 *************************************************/
689 /* This function is called by the -bv and -bt code. It extracts a working
690 address from a full RFC 822 address. This isn't really necessary per se, but it
691 has the effect of collapsing source routes.
695 flags flag bits for verify_address()
696 exit_value to be set for failures
702 test_address(uschar *s, int flags, int *exit_value)
704 int start, end, domain;
705 uschar *parse_error = NULL;
706 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
710 fprintf(stdout, "syntax error: %s\n", parse_error);
715 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
716 -1, -1, NULL, NULL, NULL);
717 if (rc == FAIL) *exit_value = 2;
718 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
724 /*************************************************
725 * Show supported features *
726 *************************************************/
728 /* This function is called for -bV/--version and for -d to output the optional
729 features of the current Exim binary.
731 Arguments: a FILE for printing
736 show_whats_supported(FILE *f)
740 #ifdef DB_VERSION_STRING
741 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
742 #elif defined(BTREEVERSION) && defined(HASHVERSION)
744 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
746 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
748 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
749 fprintf(f, "Probably ndbm\n");
750 #elif defined(USE_TDB)
751 fprintf(f, "Using tdb\n");
754 fprintf(f, "Probably GDBM (native mode)\n");
756 fprintf(f, "Probably GDBM (compatibility mode)\n");
760 fprintf(f, "Support for:");
761 #ifdef SUPPORT_CRYPTEQ
762 fprintf(f, " crypteq");
765 fprintf(f, " iconv()");
770 #ifdef HAVE_SETCLASSRESOURCES
771 fprintf(f, " use_setclassresources");
780 fprintf(f, " Expand_dlfunc");
782 #ifdef USE_TCP_WRAPPERS
783 fprintf(f, " TCPwrappers");
787 fprintf(f, " GnuTLS");
789 fprintf(f, " OpenSSL");
792 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
793 fprintf(f, " translate_ip_address");
795 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
796 fprintf(f, " move_frozen_messages");
798 #ifdef WITH_CONTENT_SCAN
799 fprintf(f, " Content_Scanning");
804 #ifdef WITH_OLD_DEMIME
805 fprintf(f, " Old_Demime");
807 #ifdef EXPERIMENTAL_SPF
808 fprintf(f, " Experimental_SPF");
810 #ifdef EXPERIMENTAL_SRS
811 fprintf(f, " Experimental_SRS");
813 #ifdef EXPERIMENTAL_BRIGHTMAIL
814 fprintf(f, " Experimental_Brightmail");
816 #ifdef EXPERIMENTAL_DCC
817 fprintf(f, " Experimental_DCC");
819 #ifdef EXPERIMENTAL_OCSP
820 fprintf(f, " Experimental_OCSP");
824 fprintf(f, "Lookups (built-in):");
825 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
826 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
828 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
831 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
832 fprintf(f, " dbm dbmjz dbmnz");
834 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
835 fprintf(f, " dnsdb");
837 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
838 fprintf(f, " dsearch");
840 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
841 fprintf(f, " ibase");
843 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
844 fprintf(f, " ldap ldapdn ldapm");
846 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
847 fprintf(f, " mysql");
849 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
850 fprintf(f, " nis nis0");
852 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
853 fprintf(f, " nisplus");
855 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
856 fprintf(f, " oracle");
858 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
859 fprintf(f, " passwd");
861 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
862 fprintf(f, " pgsql");
864 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
865 fprintf(f, " sqlite");
867 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
868 fprintf(f, " testdb");
870 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
871 fprintf(f, " whoson");
875 fprintf(f, "Authenticators:");
877 fprintf(f, " cram_md5");
879 #ifdef AUTH_CYRUS_SASL
880 fprintf(f, " cyrus_sasl");
883 fprintf(f, " dovecot");
886 fprintf(f, " gsasl");
888 #ifdef AUTH_HEIMDAL_GSSAPI
889 fprintf(f, " heimdal_gssapi");
891 #ifdef AUTH_PLAINTEXT
892 fprintf(f, " plaintext");
899 fprintf(f, "Routers:");
901 fprintf(f, " accept");
903 #ifdef ROUTER_DNSLOOKUP
904 fprintf(f, " dnslookup");
906 #ifdef ROUTER_IPLITERAL
907 fprintf(f, " ipliteral");
909 #ifdef ROUTER_IPLOOKUP
910 fprintf(f, " iplookup");
912 #ifdef ROUTER_MANUALROUTE
913 fprintf(f, " manualroute");
915 #ifdef ROUTER_QUERYPROGRAM
916 fprintf(f, " queryprogram");
918 #ifdef ROUTER_REDIRECT
919 fprintf(f, " redirect");
923 fprintf(f, "Transports:");
924 #ifdef TRANSPORT_APPENDFILE
925 fprintf(f, " appendfile");
926 #ifdef SUPPORT_MAILDIR
927 fprintf(f, "/maildir");
929 #ifdef SUPPORT_MAILSTORE
930 fprintf(f, "/mailstore");
936 #ifdef TRANSPORT_AUTOREPLY
937 fprintf(f, " autoreply");
939 #ifdef TRANSPORT_LMTP
942 #ifdef TRANSPORT_PIPE
945 #ifdef TRANSPORT_SMTP
950 if (fixed_never_users[0] > 0)
953 fprintf(f, "Fixed never_users: ");
954 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
955 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
956 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
959 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
961 /* Everything else is details which are only worth reporting when debugging.
962 Perhaps the tls_version_report should move into this too. */
967 /* clang defines __GNUC__ (at least, for me) so test for it first */
968 #if defined(__clang__)
969 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
970 #elif defined(__GNUC__)
971 fprintf(f, "Compiler: GCC [%s]\n",
975 "? unknown version ?"
979 fprintf(f, "Compiler: <unknown>\n");
983 tls_version_report(f);
986 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
987 if (authi->version_report) {
988 (*authi->version_report)(f);
992 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
993 characters; unless it's an ancient version of PCRE in which case it
995 #ifndef PCRE_PRERELEASE
996 #define PCRE_PRERELEASE
999 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1000 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1002 PCRE_MAJOR, PCRE_MINOR,
1003 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1006 #undef EXPAND_AND_QUOTE
1009 for (i = 0; i < lookup_list_count; i++)
1011 if (lookup_list[i]->version_report)
1012 lookup_list[i]->version_report(f);
1015 #ifdef WHITELIST_D_MACROS
1016 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1018 fprintf(f, "WHITELIST_D_MACROS unset\n");
1020 #ifdef TRUSTED_CONFIG_LIST
1021 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1023 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1030 /*************************************************
1031 * Show auxiliary information about Exim *
1032 *************************************************/
1035 show_exim_information(enum commandline_info request, FILE *stream)
1042 fprintf(stream, "Oops, something went wrong.\n");
1046 "The -bI: flag takes a string indicating which information to provide.\n"
1047 "If the string is not recognised, you'll get this help (on stderr).\n"
1049 " exim -bI:help this information\n"
1050 " exim -bI:dscp dscp value keywords known\n"
1051 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1055 for (pp = exim_sieve_extension_list; *pp; ++pp)
1056 fprintf(stream, "%s\n", *pp);
1059 dscp_list_to_stream(stream);
1065 /*************************************************
1066 * Quote a local part *
1067 *************************************************/
1069 /* This function is used when a sender address or a From: or Sender: header
1070 line is being created from the caller's login, or from an authenticated_id. It
1071 applies appropriate quoting rules for a local part.
1073 Argument: the local part
1074 Returns: the local part, quoted if necessary
1078 local_part_quote(uschar *lpart)
1080 BOOL needs_quote = FALSE;
1085 for (t = lpart; !needs_quote && *t != 0; t++)
1087 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1088 (*t != '.' || t == lpart || t[1] == 0);
1091 if (!needs_quote) return lpart;
1094 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1098 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1101 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1104 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1105 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1106 yield = string_cat(yield, &size, &ptr, nq, 1);
1110 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1118 /*************************************************
1119 * Load readline() functions *
1120 *************************************************/
1122 /* This function is called from testing executions that read data from stdin,
1123 but only when running as the calling user. Currently, only -be does this. The
1124 function loads the readline() function library and passes back the functions.
1125 On some systems, it needs the curses library, so load that too, but try without
1126 it if loading fails. All this functionality has to be requested at build time.
1129 fn_readline_ptr pointer to where to put the readline pointer
1130 fn_addhist_ptr pointer to where to put the addhistory function
1132 Returns: the dlopen handle or NULL on failure
1136 set_readline(char * (**fn_readline_ptr)(const char *),
1137 void (**fn_addhist_ptr)(const char *))
1140 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1142 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1143 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1145 if (dlhandle != NULL)
1147 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1148 * char * readline (const char *prompt);
1149 * void add_history (const char *string);
1151 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1152 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1156 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1165 /*************************************************
1166 * Get a line from stdin for testing things *
1167 *************************************************/
1169 /* This function is called when running tests that can take a number of lines
1170 of input (for example, -be and -bt). It handles continuations and trailing
1171 spaces. And prompting and a blank line output on eof. If readline() is in use,
1172 the arguments are non-NULL and provide the relevant functions.
1175 fn_readline readline function or NULL
1176 fn_addhist addhist function or NULL
1178 Returns: pointer to dynamic memory, or NULL at end of file
1182 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1187 uschar *yield = NULL;
1189 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1193 uschar buffer[1024];
1197 char *readline_line = NULL;
1198 if (fn_readline != NULL)
1200 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1201 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1202 p = US readline_line;
1207 /* readline() not in use */
1210 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1214 /* Handle the line */
1216 ss = p + (int)Ustrlen(p);
1217 while (ss > p && isspace(ss[-1])) ss--;
1221 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1224 yield = string_cat(yield, &size, &ptr, p, ss - p);
1227 if (fn_readline != NULL) free(readline_line);
1230 if (ss == p || yield[ptr-1] != '\\')
1238 if (yield == NULL) printf("\n");
1244 /*************************************************
1245 * Output usage information for the program *
1246 *************************************************/
1248 /* This function is called when there are no recipients
1249 or a specific --help argument was added.
1252 progname information on what name we were called by
1254 Returns: DOES NOT RETURN
1258 exim_usage(uschar *progname)
1261 /* Handle specific program invocation varients */
1262 if (Ustrcmp(progname, US"-mailq") == 0)
1265 "mailq - list the contents of the mail queue\n\n"
1266 "For a list of options, see the Exim documentation.\n");
1270 /* Generic usage - we output this whatever happens */
1272 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1273 "not directly from a shell command line. Options and/or arguments control\n"
1274 "what it does when called. For a list of options, see the Exim documentation.\n");
1281 /*************************************************
1282 * Validate that the macros given are okay *
1283 *************************************************/
1285 /* Typically, Exim will drop privileges if macros are supplied. In some
1286 cases, we want to not do so.
1288 Arguments: none (macros is a global)
1289 Returns: true if trusted, false otherwise
1293 macros_trusted(void)
1295 #ifdef WHITELIST_D_MACROS
1297 uschar *whitelisted, *end, *p, **whites, **w;
1298 int white_count, i, n;
1300 BOOL prev_char_item, found;
1305 #ifndef WHITELIST_D_MACROS
1309 /* We only trust -D overrides for some invoking users:
1310 root, the exim run-time user, the optional config owner user.
1311 I don't know why config-owner would be needed, but since they can own the
1312 config files anyway, there's no security risk to letting them override -D. */
1313 if ( ! ((real_uid == root_uid)
1314 || (real_uid == exim_uid)
1315 #ifdef CONFIGURE_OWNER
1316 || (real_uid == config_uid)
1320 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1324 /* Get a list of macros which are whitelisted */
1325 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1326 prev_char_item = FALSE;
1328 for (p = whitelisted; *p != '\0'; ++p)
1330 if (*p == ':' || isspace(*p))
1335 prev_char_item = FALSE;
1338 if (!prev_char_item)
1339 prev_char_item = TRUE;
1346 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1347 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1352 if (i == white_count)
1354 while (*p != '\0' && p < end)
1360 /* The list of macros should be very short. Accept the N*M complexity. */
1361 for (m = macros; m != NULL; m = m->next)
1364 for (w = whites; *w; ++w)
1365 if (Ustrcmp(*w, m->name) == 0)
1372 if (m->replacement == NULL)
1374 len = Ustrlen(m->replacement);
1377 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1378 0, PCRE_EOPT, NULL, 0);
1381 if (n != PCRE_ERROR_NOMATCH)
1382 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1386 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1392 /*************************************************
1393 * Entry point and high-level code *
1394 *************************************************/
1396 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1397 the appropriate action. All the necessary functions are present in the one
1398 binary. I originally thought one should split it up, but it turns out that so
1399 much of the apparatus is needed in each chunk that one might as well just have
1400 it all available all the time, which then makes the coding easier as well.
1403 argc count of entries in argv
1404 argv argument strings, with argv[0] being the program name
1406 Returns: EXIT_SUCCESS if terminated successfully
1407 EXIT_FAILURE otherwise, except when a message has been sent
1408 to the sender, and -oee was given
1412 main(int argc, char **cargv)
1414 uschar **argv = USS cargv;
1415 int arg_receive_timeout = -1;
1416 int arg_smtp_receive_timeout = -1;
1417 int arg_error_handling = error_handling;
1418 int filter_sfd = -1;
1419 int filter_ufd = -1;
1422 int list_queue_option = 0;
1424 int msg_action_arg = -1;
1425 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1426 int queue_only_reason = 0;
1428 int perl_start_option = 0;
1430 int recipients_arg = argc;
1431 int sender_address_domain = 0;
1432 int test_retry_arg = -1;
1433 int test_rewrite_arg = -1;
1434 BOOL arg_queue_only = FALSE;
1435 BOOL bi_option = FALSE;
1436 BOOL checking = FALSE;
1437 BOOL count_queue = FALSE;
1438 BOOL expansion_test = FALSE;
1439 BOOL extract_recipients = FALSE;
1440 BOOL flag_G = FALSE;
1441 BOOL flag_n = FALSE;
1442 BOOL forced_delivery = FALSE;
1443 BOOL f_end_dot = FALSE;
1444 BOOL deliver_give_up = FALSE;
1445 BOOL list_queue = FALSE;
1446 BOOL list_options = FALSE;
1447 BOOL local_queue_only;
1449 BOOL one_msg_action = FALSE;
1450 BOOL queue_only_set = FALSE;
1451 BOOL receiving_message = TRUE;
1452 BOOL sender_ident_set = FALSE;
1453 BOOL session_local_queue_only;
1455 BOOL removed_privilege = FALSE;
1456 BOOL usage_wanted = FALSE;
1457 BOOL verify_address_mode = FALSE;
1458 BOOL verify_as_sender = FALSE;
1459 BOOL version_printed = FALSE;
1460 uschar *alias_arg = NULL;
1461 uschar *called_as = US"";
1462 uschar *cmdline_syslog_name = NULL;
1463 uschar *start_queue_run_id = NULL;
1464 uschar *stop_queue_run_id = NULL;
1465 uschar *expansion_test_message = NULL;
1466 uschar *ftest_domain = NULL;
1467 uschar *ftest_localpart = NULL;
1468 uschar *ftest_prefix = NULL;
1469 uschar *ftest_suffix = NULL;
1470 uschar *malware_test_file = NULL;
1471 uschar *real_sender_address;
1472 uschar *originator_home = US"/";
1477 struct stat statbuf;
1478 pid_t passed_qr_pid = (pid_t)0;
1479 int passed_qr_pipe = -1;
1480 gid_t group_list[NGROUPS_MAX];
1482 /* For the -bI: flag */
1483 enum commandline_info info_flag = CMDINFO_NONE;
1484 BOOL info_stdout = FALSE;
1486 /* Possible options for -R and -S */
1488 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1490 /* Need to define this in case we need to change the environment in order
1491 to get rid of a bogus time zone. We have to make it char rather than uschar
1492 because some OS define it in /usr/include/unistd.h. */
1494 extern char **environ;
1496 /* If the Exim user and/or group and/or the configuration file owner/group were
1497 defined by ref:name at build time, we must now find the actual uid/gid values.
1498 This is a feature to make the lives of binary distributors easier. */
1500 #ifdef EXIM_USERNAME
1501 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1505 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1509 /* If ref:name uses a number as the name, route_finduser() returns
1510 TRUE with exim_uid set and pw coerced to NULL. */
1512 exim_gid = pw->pw_gid;
1513 #ifndef EXIM_GROUPNAME
1517 "exim: ref:name should specify a usercode, not a group.\n"
1518 "exim: can't let you get away with it unless you also specify a group.\n");
1525 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1531 #ifdef EXIM_GROUPNAME
1532 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1534 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1540 #ifdef CONFIGURE_OWNERNAME
1541 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1543 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1544 CONFIGURE_OWNERNAME);
1549 /* We default the system_filter_user to be the Exim run-time user, as a
1550 sane non-root value. */
1551 system_filter_uid = exim_uid;
1553 #ifdef CONFIGURE_GROUPNAME
1554 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1556 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1557 CONFIGURE_GROUPNAME);
1562 /* In the Cygwin environment, some initialization needs doing. It is fudged
1563 in by means of this macro. */
1569 /* Check a field which is patched when we are running Exim within its
1570 testing harness; do a fast initial check, and then the whole thing. */
1572 running_in_test_harness =
1573 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1575 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1576 at the start of a program; however, it seems that some environments do not
1577 follow this. A "strange" locale can affect the formatting of timestamps, so we
1580 setlocale(LC_ALL, "C");
1582 /* Set up the default handler for timing using alarm(). */
1584 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1586 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1587 because store_malloc writes a log entry on failure. */
1589 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1590 if (log_buffer == NULL)
1592 fprintf(stderr, "exim: failed to get store for log buffer\n");
1596 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1597 NULL when the daemon is run and the file is closed. We have to use this
1598 indirection, because some systems don't allow writing to the variable "stderr".
1601 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1603 /* Arrange for the PCRE regex library to use our store functions. Note that
1604 the normal calls are actually macros that add additional arguments for
1605 debugging purposes so we have to assign specially constructed functions here.
1606 The default is to use store in the stacking pool, but this is overridden in the
1607 regex_must_compile() function. */
1609 pcre_malloc = function_store_get;
1610 pcre_free = function_dummy_free;
1612 /* Ensure there is a big buffer for temporary use in several places. It is put
1613 in malloc store so that it can be freed for enlargement if necessary. */
1615 big_buffer = store_malloc(big_buffer_size);
1617 /* Set up the handler for the data request signal, and set the initial
1618 descriptive text. */
1620 set_process_info("initializing");
1621 os_restarting_signal(SIGUSR1, usr1_handler);
1623 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1624 in the daemon code. For the rest of Exim's uses, we ignore it. */
1626 signal(SIGHUP, SIG_IGN);
1628 /* We don't want to die on pipe errors as the code is written to handle
1629 the write error instead. */
1631 signal(SIGPIPE, SIG_IGN);
1633 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1634 set to SIG_IGN. This causes subprocesses that complete before the parent
1635 process waits for them not to hang around, so when Exim calls wait(), nothing
1636 is there. The wait() code has been made robust against this, but let's ensure
1637 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1638 ending status. We use sigaction rather than plain signal() on those OS where
1639 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1640 problem on AIX with this.) */
1644 struct sigaction act;
1645 act.sa_handler = SIG_DFL;
1646 sigemptyset(&(act.sa_mask));
1648 sigaction(SIGCHLD, &act, NULL);
1651 signal(SIGCHLD, SIG_DFL);
1654 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1659 /* Set up the version number. Set up the leading 'E' for the external form of
1660 message ids, set the pointer to the internal form, and initialize it to
1661 indicate no message being processed. */
1664 message_id_option[0] = '-';
1665 message_id_external = message_id_option + 1;
1666 message_id_external[0] = 'E';
1667 message_id = message_id_external + 1;
1670 /* Set the umask to zero so that any files Exim creates using open() are
1671 created with the modes that it specifies. NOTE: Files created with fopen() have
1672 a problem, which was not recognized till rather late (February 2006). With this
1673 umask, such files will be world writeable. (They are all content scanning files
1674 in the spool directory, which isn't world-accessible, so this is not a
1675 disaster, but it's untidy.) I don't want to change this overall setting,
1676 however, because it will interact badly with the open() calls. Instead, there's
1677 now a function called modefopen() that fiddles with the umask while calling
1682 /* Precompile the regular expression for matching a message id. Keep this in
1683 step with the code that generates ids in the accept.c module. We need to do
1684 this here, because the -M options check their arguments for syntactic validity
1685 using mac_ismsgid, which uses this. */
1688 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1690 /* Precompile the regular expression that is used for matching an SMTP error
1691 code, possibly extended, at the start of an error message. Note that the
1692 terminating whitespace character is included. */
1695 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1698 #ifdef WHITELIST_D_MACROS
1699 /* Precompile the regular expression used to filter the content of macros
1700 given to -D for permissibility. */
1702 regex_whitelisted_macro =
1703 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1707 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1708 this seems to be a generally accepted convention, since one finds symbolic
1709 links called "mailq" in standard OS configurations. */
1711 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1712 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1715 receiving_message = FALSE;
1716 called_as = US"-mailq";
1719 /* If the program is called as "rmail" treat it as equivalent to
1720 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1721 i.e. preventing a single dot on a line from terminating the message, and
1722 returning with zero return code, even in cases of error (provided an error
1723 message has been sent). */
1725 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1726 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1729 called_as = US"-rmail";
1730 errors_sender_rc = EXIT_SUCCESS;
1733 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1734 this is a smail convention. */
1736 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1737 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1739 smtp_input = smtp_batched_input = TRUE;
1740 called_as = US"-rsmtp";
1743 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1744 this is a smail convention. */
1746 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1747 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1750 receiving_message = FALSE;
1751 called_as = US"-runq";
1754 /* If the program is called as "newaliases" treat it as equivalent to
1755 "exim -bi"; this is a sendmail convention. */
1757 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1758 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1761 receiving_message = FALSE;
1762 called_as = US"-newaliases";
1765 /* Save the original effective uid for a couple of uses later. It should
1766 normally be root, but in some esoteric environments it may not be. */
1768 original_euid = geteuid();
1770 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1771 to be the same as the real ones. This makes a difference only if Exim is setuid
1772 (or setgid) to something other than root, which could be the case in some
1773 special configurations. */
1775 real_uid = getuid();
1776 real_gid = getgid();
1778 if (real_uid == root_uid)
1780 rv = setgid(real_gid);
1783 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1784 (long int)real_gid, strerror(errno));
1787 rv = setuid(real_uid);
1790 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1791 (long int)real_uid, strerror(errno));
1796 /* If neither the original real uid nor the original euid was root, Exim is
1797 running in an unprivileged state. */
1799 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1801 /* Scan the program's arguments. Some can be dealt with right away; others are
1802 simply recorded for checking and handling afterwards. Do a high-level switch
1803 on the second character (the one after '-'), to save some effort. */
1805 for (i = 1; i < argc; i++)
1807 BOOL badarg = FALSE;
1808 uschar *arg = argv[i];
1812 /* An argument not starting with '-' is the start of a recipients list;
1813 break out of the options-scanning loop. */
1821 /* An option consistion of -- terminates the options */
1823 if (Ustrcmp(arg, "--") == 0)
1825 recipients_arg = i + 1;
1829 /* Handle flagged options */
1831 switchchar = arg[1];
1834 /* Make all -ex options synonymous with -oex arguments, since that
1835 is assumed by various callers. Also make -qR options synonymous with -R
1836 options, as that seems to be required as well. Allow for -qqR too, and
1837 the same for -S options. */
1839 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1840 Ustrncmp(arg+1, "qR", 2) == 0 ||
1841 Ustrncmp(arg+1, "qS", 2) == 0)
1843 switchchar = arg[2];
1846 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1848 switchchar = arg[3];
1850 queue_2stage = TRUE;
1853 /* Make -r synonymous with -f, since it is a documented alias */
1855 else if (arg[1] == 'r') switchchar = 'f';
1857 /* Make -ov synonymous with -v */
1859 else if (Ustrcmp(arg, "-ov") == 0)
1865 /* deal with --option_aliases */
1866 else if (switchchar == '-')
1868 if (Ustrcmp(argrest, "help") == 0)
1870 usage_wanted = TRUE;
1873 else if (Ustrcmp(argrest, "version") == 0)
1880 /* High-level switch on active initial letter */
1885 /* sendmail uses -Ac and -Am to control which .cf file is used;
1888 if (*argrest == '\0') { badarg = TRUE; break; }
1891 BOOL ignore = FALSE;
1896 if (*(argrest + 1) == '\0')
1900 if (!ignore) { badarg = TRUE; break; }
1904 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1905 so has no need of it. */
1908 if (*argrest == 0) i++; /* Skip over the type */
1913 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1915 /* -bd: Run in daemon mode, awaiting SMTP connections.
1916 -bdf: Ditto, but in the foreground.
1919 if (*argrest == 'd')
1921 daemon_listen = TRUE;
1922 if (*(++argrest) == 'f') background_daemon = FALSE;
1923 else if (*argrest != 0) { badarg = TRUE; break; }
1926 /* -be: Run in expansion test mode
1927 -bem: Ditto, but read a message from a file first
1930 else if (*argrest == 'e')
1932 expansion_test = checking = TRUE;
1933 if (argrest[1] == 'm')
1935 if (++i >= argc) { badarg = TRUE; break; }
1936 expansion_test_message = argv[i];
1939 if (argrest[1] != 0) { badarg = TRUE; break; }
1942 /* -bF: Run system filter test */
1944 else if (*argrest == 'F')
1946 filter_test |= FTEST_SYSTEM;
1947 if (*(++argrest) != 0) { badarg = TRUE; break; }
1948 if (++i < argc) filter_test_sfile = argv[i]; else
1950 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1955 /* -bf: Run user filter test
1956 -bfd: Set domain for filter testing
1957 -bfl: Set local part for filter testing
1958 -bfp: Set prefix for filter testing
1959 -bfs: Set suffix for filter testing
1962 else if (*argrest == 'f')
1964 if (*(++argrest) == 0)
1966 filter_test |= FTEST_USER;
1967 if (++i < argc) filter_test_ufile = argv[i]; else
1969 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1977 fprintf(stderr, "exim: string expected after %s\n", arg);
1980 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1981 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1982 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1983 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1984 else { badarg = TRUE; break; }
1988 /* -bh: Host checking - an IP address must follow. */
1990 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1992 if (++i >= argc) { badarg = TRUE; break; }
1993 sender_host_address = argv[i];
1994 host_checking = checking = log_testing_mode = TRUE;
1995 host_checking_callout = argrest[1] == 'c';
1998 /* -bi: This option is used by sendmail to initialize *the* alias file,
1999 though it has the -oA option to specify a different file. Exim has no
2000 concept of *the* alias file, but since Sun's YP make script calls
2001 sendmail this way, some support must be provided. */
2003 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2005 /* -bI: provide information, of the type to follow after a colon.
2006 This is an Exim flag. */
2008 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2010 uschar *p = &argrest[2];
2011 info_flag = CMDINFO_HELP;
2014 if (strcmpic(p, CUS"sieve") == 0)
2016 info_flag = CMDINFO_SIEVE;
2019 else if (strcmpic(p, CUS"dscp") == 0)
2021 info_flag = CMDINFO_DSCP;
2024 else if (strcmpic(p, CUS"help") == 0)
2031 /* -bm: Accept and deliver message - the default option. Reinstate
2032 receiving_message, which got turned off for all -b options. */
2034 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2036 /* -bmalware: test the filename given for malware */
2038 else if (Ustrcmp(argrest, "malware") == 0)
2040 if (++i >= argc) { badarg = TRUE; break; }
2041 malware_test_file = argv[i];
2044 /* -bnq: For locally originating messages, do not qualify unqualified
2045 addresses. In the envelope, this causes errors; in header lines they
2048 else if (Ustrcmp(argrest, "nq") == 0)
2050 allow_unqualified_sender = FALSE;
2051 allow_unqualified_recipient = FALSE;
2054 /* -bpxx: List the contents of the mail queue, in various forms. If
2055 the option is -bpc, just a queue count is needed. Otherwise, if the
2056 first letter after p is r, then order is random. */
2058 else if (*argrest == 'p')
2060 if (*(++argrest) == 'c')
2063 if (*(++argrest) != 0) badarg = TRUE;
2067 if (*argrest == 'r')
2069 list_queue_option = 8;
2072 else list_queue_option = 0;
2076 /* -bp: List the contents of the mail queue, top-level only */
2078 if (*argrest == 0) {}
2080 /* -bpu: List the contents of the mail queue, top-level undelivered */
2082 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2084 /* -bpa: List the contents of the mail queue, including all delivered */
2086 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2088 /* Unknown after -bp[r] */
2098 /* -bP: List the configuration variables given as the address list.
2099 Force -v, so configuration errors get displayed. */
2101 else if (Ustrcmp(argrest, "P") == 0)
2103 list_options = TRUE;
2104 debug_selector |= D_v;
2105 debug_file = stderr;
2108 /* -brt: Test retry configuration lookup */
2110 else if (Ustrcmp(argrest, "rt") == 0)
2112 test_retry_arg = i + 1;
2116 /* -brw: Test rewrite configuration */
2118 else if (Ustrcmp(argrest, "rw") == 0)
2120 test_rewrite_arg = i + 1;
2124 /* -bS: Read SMTP commands on standard input, but produce no replies -
2125 all errors are reported by sending messages. */
2127 else if (Ustrcmp(argrest, "S") == 0)
2128 smtp_input = smtp_batched_input = receiving_message = TRUE;
2130 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2131 on standard output. */
2133 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2135 /* -bt: address testing mode */
2137 else if (Ustrcmp(argrest, "t") == 0)
2138 address_test_mode = checking = log_testing_mode = TRUE;
2140 /* -bv: verify addresses */
2142 else if (Ustrcmp(argrest, "v") == 0)
2143 verify_address_mode = checking = log_testing_mode = TRUE;
2145 /* -bvs: verify sender addresses */
2147 else if (Ustrcmp(argrest, "vs") == 0)
2149 verify_address_mode = checking = log_testing_mode = TRUE;
2150 verify_as_sender = TRUE;
2153 /* -bV: Print version string and support details */
2155 else if (Ustrcmp(argrest, "V") == 0)
2157 printf("Exim version %s #%s built %s\n", version_string,
2158 version_cnumber, version_date);
2159 printf("%s\n", CS version_copyright);
2160 version_printed = TRUE;
2161 show_whats_supported(stdout);
2164 /* -bw: inetd wait mode, accept a listening socket as stdin */
2166 else if (*argrest == 'w')
2168 inetd_wait_mode = TRUE;
2169 background_daemon = FALSE;
2170 daemon_listen = TRUE;
2171 if (*(++argrest) != '\0')
2173 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2174 if (inetd_wait_timeout <= 0)
2176 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2186 /* -C: change configuration file list; ignore if it isn't really
2187 a change! Enforce a prefix check if required. */
2192 if(++i < argc) argrest = argv[i]; else
2193 { badarg = TRUE; break; }
2195 if (Ustrcmp(config_main_filelist, argrest) != 0)
2197 #ifdef ALT_CONFIG_PREFIX
2199 int len = Ustrlen(ALT_CONFIG_PREFIX);
2200 uschar *list = argrest;
2202 while((filename = string_nextinlist(&list, &sep, big_buffer,
2203 big_buffer_size)) != NULL)
2205 if ((Ustrlen(filename) < len ||
2206 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2207 Ustrstr(filename, "/../") != NULL) &&
2208 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2210 fprintf(stderr, "-C Permission denied\n");
2215 if (real_uid != root_uid)
2217 #ifdef TRUSTED_CONFIG_LIST
2219 if (real_uid != exim_uid
2220 #ifdef CONFIGURE_OWNER
2221 && real_uid != config_uid
2224 trusted_config = FALSE;
2227 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2230 struct stat statbuf;
2232 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2233 (statbuf.st_uid != root_uid /* owner not root */
2234 #ifdef CONFIGURE_OWNER
2235 && statbuf.st_uid != config_uid /* owner not the special one */
2238 (statbuf.st_gid != root_gid /* group not root */
2239 #ifdef CONFIGURE_GROUP
2240 && statbuf.st_gid != config_gid /* group not the special one */
2242 && (statbuf.st_mode & 020) != 0 /* group writeable */
2244 (statbuf.st_mode & 2) != 0) /* world writeable */
2246 trusted_config = FALSE;
2251 /* Well, the trust list at least is up to scratch... */
2252 void *reset_point = store_get(0);
2253 uschar *trusted_configs[32];
2257 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2259 uschar *start = big_buffer, *nl;
2260 while (*start && isspace(*start))
2264 nl = Ustrchr(start, '\n');
2267 trusted_configs[nr_configs++] = string_copy(start);
2268 if (nr_configs == 32)
2276 uschar *list = argrest;
2278 while (trusted_config && (filename = string_nextinlist(&list,
2279 &sep, big_buffer, big_buffer_size)) != NULL)
2281 for (i=0; i < nr_configs; i++)
2283 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2286 if (i == nr_configs)
2288 trusted_config = FALSE;
2292 store_reset(reset_point);
2296 /* No valid prefixes found in trust_list file. */
2297 trusted_config = FALSE;
2303 /* Could not open trust_list file. */
2304 trusted_config = FALSE;
2308 /* Not root; don't trust config */
2309 trusted_config = FALSE;
2313 config_main_filelist = argrest;
2314 config_changed = TRUE;
2319 /* -D: set up a macro definition */
2322 #ifdef DISABLE_D_OPTION
2323 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2328 macro_item *mlast = NULL;
2331 uschar *s = argrest;
2333 while (isspace(*s)) s++;
2335 if (*s < 'A' || *s > 'Z')
2337 fprintf(stderr, "exim: macro name set by -D must start with "
2338 "an upper case letter\n");
2342 while (isalnum(*s) || *s == '_')
2344 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2348 if (ptr == 0) { badarg = TRUE; break; }
2349 while (isspace(*s)) s++;
2352 if (*s++ != '=') { badarg = TRUE; break; }
2353 while (isspace(*s)) s++;
2356 for (m = macros; m != NULL; m = m->next)
2358 if (Ustrcmp(m->name, name) == 0)
2360 fprintf(stderr, "exim: duplicated -D in command line\n");
2366 m = store_get(sizeof(macro_item) + Ustrlen(name));
2368 m->command_line = TRUE;
2369 if (mlast == NULL) macros = m; else mlast->next = m;
2370 Ustrcpy(m->name, name);
2371 m->replacement = string_copy(s);
2373 if (clmacro_count >= MAX_CLMACROS)
2375 fprintf(stderr, "exim: too many -D options on command line\n");
2378 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2384 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2385 The latter is now a no-op, retained for compatibility only. If -dd is used,
2386 debugging subprocesses of the daemon is disabled. */
2389 if (Ustrcmp(argrest, "ropcr") == 0)
2391 /* drop_cr = TRUE; */
2394 /* Use an intermediate variable so that we don't set debugging while
2395 decoding the debugging bits. */
2399 unsigned int selector = D_default;
2402 if (*argrest == 'd')
2404 debug_daemon = TRUE;
2408 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2409 debug_options_count, US"debug", 0);
2410 debug_selector = selector;
2415 /* -E: This is a local error message. This option is not intended for
2416 external use at all, but is not restricted to trusted callers because it
2417 does no harm (just suppresses certain error messages) and if Exim is run
2418 not setuid root it won't always be trusted when it generates error
2419 messages using this option. If there is a message id following -E, point
2420 message_reference at it, for logging. */
2423 local_error_message = TRUE;
2424 if (mac_ismsgid(argrest)) message_reference = argrest;
2428 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2429 option, so it looks as if historically the -oex options are also callable
2430 without the leading -o. So we have to accept them. Before the switch,
2431 anything starting -oe has been converted to -e. Exim does not support all
2432 of the sendmail error options. */
2435 if (Ustrcmp(argrest, "e") == 0)
2437 arg_error_handling = ERRORS_SENDER;
2438 errors_sender_rc = EXIT_SUCCESS;
2440 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2441 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2442 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2443 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2448 /* -F: Set sender's full name, used instead of the gecos entry from
2449 the password file. Since users can usually alter their gecos entries,
2450 there's no security involved in using this instead. The data can follow
2451 the -F or be in the next argument. */
2456 if(++i < argc) argrest = argv[i]; else
2457 { badarg = TRUE; break; }
2459 originator_name = argrest;
2460 sender_name_forced = TRUE;
2464 /* -f: Set sender's address - this value is only actually used if Exim is
2465 run by a trusted user, or if untrusted_set_sender is set and matches the
2466 address, except that the null address can always be set by any user. The
2467 test for this happens later, when the value given here is ignored when not
2468 permitted. For an untrusted user, the actual sender is still put in Sender:
2469 if it doesn't match the From: header (unless no_local_from_check is set).
2470 The data can follow the -f or be in the next argument. The -r switch is an
2471 obsolete form of -f but since there appear to be programs out there that
2472 use anything that sendmail has ever supported, better accept it - the
2473 synonymizing is done before the switch above.
2475 At this stage, we must allow domain literal addresses, because we don't
2476 know what the setting of allow_domain_literals is yet. Ditto for trailing
2477 dots and strip_trailing_dot. */
2485 if (i+1 < argc) argrest = argv[++i]; else
2486 { badarg = TRUE; break; }
2490 sender_address = string_sprintf(""); /* Ensure writeable memory */
2494 uschar *temp = argrest + Ustrlen(argrest) - 1;
2495 while (temp >= argrest && isspace(*temp)) temp--;
2496 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2497 allow_domain_literals = TRUE;
2498 strip_trailing_dot = TRUE;
2499 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2500 &sender_address_domain, TRUE);
2501 allow_domain_literals = FALSE;
2502 strip_trailing_dot = FALSE;
2503 if (sender_address == NULL)
2505 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2506 return EXIT_FAILURE;
2509 sender_address_forced = TRUE;
2513 /* -G: sendmail invocation to specify that it's a gateway submission and
2514 sendmail may complain about problems instead of fixing them.
2515 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2516 not at this time complain about problems. */
2522 /* -h: Set the hop count for an incoming message. Exim does not currently
2523 support this; it always computes it by counting the Received: headers.
2524 To put it in will require a change to the spool header file format. */
2529 if(++i < argc) argrest = argv[i]; else
2530 { badarg = TRUE; break; }
2532 if (!isdigit(*argrest)) badarg = TRUE;
2536 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2537 not to be documented for sendmail but mailx (at least) uses it) */
2540 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2544 /* -L: set the identifier used for syslog; equivalent to setting
2545 syslog_processname in the config file, but needs to be an admin option. */
2548 if (*argrest == '\0')
2550 if(++i < argc) argrest = argv[i]; else
2551 { badarg = TRUE; break; }
2553 sz = Ustrlen(argrest);
2556 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2557 return EXIT_FAILURE;
2561 fprintf(stderr, "exim: the -L syslog name is too short\n");
2562 return EXIT_FAILURE;
2564 cmdline_syslog_name = argrest;
2568 receiving_message = FALSE;
2570 /* -MC: continue delivery of another message via an existing open
2571 file descriptor. This option is used for an internal call by the
2572 smtp transport when there is a pending message waiting to go to an
2573 address to which it has got a connection. Five subsequent arguments are
2574 required: transport name, host name, IP address, sequence number, and
2575 message_id. Transports may decline to create new processes if the sequence
2576 number gets too big. The channel is stdin. This (-MC) must be the last
2577 argument. There's a subsequent check that the real-uid is privileged.
2579 If we are running in the test harness. delay for a bit, to let the process
2580 that set this one up complete. This makes for repeatability of the logging,
2583 if (Ustrcmp(argrest, "C") == 0)
2585 union sockaddr_46 interface_sock;
2586 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2590 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2591 return EXIT_FAILURE;
2594 if (msg_action_arg >= 0)
2596 fprintf(stderr, "exim: incompatible arguments\n");
2597 return EXIT_FAILURE;
2600 continue_transport = argv[++i];
2601 continue_hostname = argv[++i];
2602 continue_host_address = argv[++i];
2603 continue_sequence = Uatoi(argv[++i]);
2604 msg_action = MSG_DELIVER;
2605 msg_action_arg = ++i;
2606 forced_delivery = TRUE;
2607 queue_run_pid = passed_qr_pid;
2608 queue_run_pipe = passed_qr_pipe;
2610 if (!mac_ismsgid(argv[i]))
2612 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2614 return EXIT_FAILURE;
2617 /* Set up $sending_ip_address and $sending_port */
2619 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2621 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2625 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2627 return EXIT_FAILURE;
2630 if (running_in_test_harness) millisleep(500);
2634 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2635 precedes -MC (see above). The flag indicates that the host to which
2636 Exim is connected has accepted an AUTH sequence. */
2638 else if (Ustrcmp(argrest, "CA") == 0)
2640 smtp_authenticated = TRUE;
2644 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2645 it preceded -MC (see above) */
2647 else if (Ustrcmp(argrest, "CP") == 0)
2649 smtp_use_pipelining = TRUE;
2653 /* -MCQ: pass on the pid of the queue-running process that started
2654 this chain of deliveries and the fd of its synchronizing pipe; this
2655 is useful only when it precedes -MC (see above) */
2657 else if (Ustrcmp(argrest, "CQ") == 0)
2659 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2661 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2666 /* -MCS: set the smtp_use_size flag; this is useful only when it
2667 precedes -MC (see above) */
2669 else if (Ustrcmp(argrest, "CS") == 0)
2671 smtp_use_size = TRUE;
2675 /* -MCT: set the tls_offered flag; this is useful only when it
2676 precedes -MC (see above). The flag indicates that the host to which
2677 Exim is connected has offered TLS support. */
2680 else if (Ustrcmp(argrest, "CT") == 0)
2687 /* -M[x]: various operations on the following list of message ids:
2688 -M deliver the messages, ignoring next retry times and thawing
2689 -Mc deliver the messages, checking next retry times, no thawing
2690 -Mf freeze the messages
2691 -Mg give up on the messages
2692 -Mt thaw the messages
2693 -Mrm remove the messages
2694 In the above cases, this must be the last option. There are also the
2695 following options which are followed by a single message id, and which
2696 act on that message. Some of them use the "recipient" addresses as well.
2697 -Mar add recipient(s)
2698 -Mmad mark all recipients delivered
2699 -Mmd mark recipients(s) delivered
2701 -Mset load a message for use with -be
2703 -Mvc show copy (of whole message, in RFC 2822 format)
2708 else if (*argrest == 0)
2710 msg_action = MSG_DELIVER;
2711 forced_delivery = deliver_force_thaw = TRUE;
2713 else if (Ustrcmp(argrest, "ar") == 0)
2715 msg_action = MSG_ADD_RECIPIENT;
2716 one_msg_action = TRUE;
2718 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2719 else if (Ustrcmp(argrest, "es") == 0)
2721 msg_action = MSG_EDIT_SENDER;
2722 one_msg_action = TRUE;
2724 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2725 else if (Ustrcmp(argrest, "g") == 0)
2727 msg_action = MSG_DELIVER;
2728 deliver_give_up = TRUE;
2730 else if (Ustrcmp(argrest, "mad") == 0)
2732 msg_action = MSG_MARK_ALL_DELIVERED;
2734 else if (Ustrcmp(argrest, "md") == 0)
2736 msg_action = MSG_MARK_DELIVERED;
2737 one_msg_action = TRUE;
2739 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2740 else if (Ustrcmp(argrest, "set") == 0)
2742 msg_action = MSG_LOAD;
2743 one_msg_action = TRUE;
2745 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2746 else if (Ustrcmp(argrest, "vb") == 0)
2748 msg_action = MSG_SHOW_BODY;
2749 one_msg_action = TRUE;
2751 else if (Ustrcmp(argrest, "vc") == 0)
2753 msg_action = MSG_SHOW_COPY;
2754 one_msg_action = TRUE;
2756 else if (Ustrcmp(argrest, "vh") == 0)
2758 msg_action = MSG_SHOW_HEADER;
2759 one_msg_action = TRUE;
2761 else if (Ustrcmp(argrest, "vl") == 0)
2763 msg_action = MSG_SHOW_LOG;
2764 one_msg_action = TRUE;
2766 else { badarg = TRUE; break; }
2768 /* All the -Mxx options require at least one message id. */
2770 msg_action_arg = i + 1;
2771 if (msg_action_arg >= argc)
2773 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2774 return EXIT_FAILURE;
2777 /* Some require only message ids to follow */
2779 if (!one_msg_action)
2782 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2784 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2786 return EXIT_FAILURE;
2788 goto END_ARG; /* Remaining args are ids */
2791 /* Others require only one message id, possibly followed by addresses,
2792 which will be handled as normal arguments. */
2796 if (!mac_ismsgid(argv[msg_action_arg]))
2798 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2799 argv[msg_action_arg], arg);
2800 return EXIT_FAILURE;
2807 /* Some programs seem to call the -om option without the leading o;
2808 for sendmail it askes for "me too". Exim always does this. */
2811 if (*argrest != 0) badarg = TRUE;
2815 /* -N: don't do delivery - a debugging option that stops transports doing
2816 their thing. It implies debugging at the D_v level. */
2821 dont_deliver = TRUE;
2822 debug_selector |= D_v;
2823 debug_file = stderr;
2829 /* -n: This means "don't alias" in sendmail, apparently.
2830 For normal invocations, it has no effect.
2831 It may affect some other options. */
2837 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2838 option to the specified value. This form uses long names. We need to handle
2839 -O option=value and -Ooption=value. */
2846 fprintf(stderr, "exim: string expected after -O\n");
2854 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2857 if (*argrest == 'A')
2859 alias_arg = argrest + 1;
2860 if (alias_arg[0] == 0)
2862 if (i+1 < argc) alias_arg = argv[++i]; else
2864 fprintf(stderr, "exim: string expected after -oA\n");
2870 /* -oB: Set a connection message max value for remote deliveries */
2872 else if (*argrest == 'B')
2874 uschar *p = argrest + 1;
2877 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2879 connection_max_messages = 1;
2888 fprintf(stderr, "exim: number expected after -oB\n");
2891 connection_max_messages = Uatoi(p);
2895 /* -odb: background delivery */
2897 else if (Ustrcmp(argrest, "db") == 0)
2899 synchronous_delivery = FALSE;
2900 arg_queue_only = FALSE;
2901 queue_only_set = TRUE;
2904 /* -odf: foreground delivery (smail-compatible option); same effect as
2905 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2908 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2910 synchronous_delivery = TRUE;
2911 arg_queue_only = FALSE;
2912 queue_only_set = TRUE;
2915 /* -odq: queue only */
2917 else if (Ustrcmp(argrest, "dq") == 0)
2919 synchronous_delivery = FALSE;
2920 arg_queue_only = TRUE;
2921 queue_only_set = TRUE;
2924 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2925 but no remote delivery */
2927 else if (Ustrcmp(argrest, "dqs") == 0)
2930 arg_queue_only = FALSE;
2931 queue_only_set = TRUE;
2934 /* -oex: Sendmail error flags. As these are also accepted without the
2935 leading -o prefix, for compatibility with vacation and other callers,
2936 they are handled with -e above. */
2938 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2939 -oitrue: Another sendmail syntax for the same */
2941 else if (Ustrcmp(argrest, "i") == 0 ||
2942 Ustrcmp(argrest, "itrue") == 0)
2945 /* -oM*: Set various characteristics for an incoming message; actually
2946 acted on for trusted callers only. */
2948 else if (*argrest == 'M')
2952 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2956 /* -oMa: Set sender host address */
2958 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2960 /* -oMaa: Set authenticator name */
2962 else if (Ustrcmp(argrest, "Maa") == 0)
2963 sender_host_authenticated = argv[++i];
2965 /* -oMas: setting authenticated sender */
2967 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2969 /* -oMai: setting authenticated id */
2971 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2973 /* -oMi: Set incoming interface address */
2975 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2977 /* -oMr: Received protocol */
2979 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2981 /* -oMs: Set sender host name */
2983 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2985 /* -oMt: Set sender ident */
2987 else if (Ustrcmp(argrest, "Mt") == 0)
2989 sender_ident_set = TRUE;
2990 sender_ident = argv[++i];
2993 /* Else a bad argument */
3002 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3003 seem to call this as -m (undocumented), so that is also accepted (see
3006 else if (Ustrcmp(argrest, "m") == 0) {}
3008 /* -oo: An ancient flag for old-style addresses which still seems to
3009 crop up in some calls (see in SCO). */
3011 else if (Ustrcmp(argrest, "o") == 0) {}
3013 /* -oP <name>: set pid file path for daemon */
3015 else if (Ustrcmp(argrest, "P") == 0)
3016 override_pid_file_path = argv[++i];
3018 /* -or <n>: set timeout for non-SMTP acceptance
3019 -os <n>: set timeout for SMTP acceptance */
3021 else if (*argrest == 'r' || *argrest == 's')
3023 int *tp = (*argrest == 'r')?
3024 &arg_receive_timeout : &arg_smtp_receive_timeout;
3025 if (argrest[1] == 0)
3027 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3029 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3032 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3037 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3039 else if (Ustrcmp(argrest, "X") == 0)
3040 override_local_interfaces = argv[++i];
3042 /* Unknown -o argument */
3048 /* -ps: force Perl startup; -pd force delayed Perl startup */
3052 if (*argrest == 's' && argrest[1] == 0)
3054 perl_start_option = 1;
3057 if (*argrest == 'd' && argrest[1] == 0)
3059 perl_start_option = -1;
3064 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3065 which sets the host protocol and host name */
3069 if (i+1 < argc) argrest = argv[++i]; else
3070 { badarg = TRUE; break; }
3075 uschar *hn = Ustrchr(argrest, ':');
3078 received_protocol = argrest;
3082 received_protocol = string_copyn(argrest, hn - argrest);
3083 sender_host_name = hn + 1;
3090 receiving_message = FALSE;
3091 if (queue_interval >= 0)
3093 fprintf(stderr, "exim: -q specified more than once\n");
3097 /* -qq...: Do queue runs in a 2-stage manner */
3099 if (*argrest == 'q')
3101 queue_2stage = TRUE;
3105 /* -qi...: Do only first (initial) deliveries */
3107 if (*argrest == 'i')
3109 queue_run_first_delivery = TRUE;
3113 /* -qf...: Run the queue, forcing deliveries
3114 -qff..: Ditto, forcing thawing as well */
3116 if (*argrest == 'f')
3118 queue_run_force = TRUE;
3119 if (*(++argrest) == 'f')
3121 deliver_force_thaw = TRUE;
3126 /* -q[f][f]l...: Run the queue only on local deliveries */
3128 if (*argrest == 'l')
3130 queue_run_local = TRUE;
3134 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3135 optionally starting from a given message id. */
3137 if (*argrest == 0 &&
3138 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3141 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3142 start_queue_run_id = argv[++i];
3143 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3144 stop_queue_run_id = argv[++i];
3147 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3148 optionally local only. */
3153 queue_interval = readconf_readtime(argrest, 0, FALSE);
3155 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3156 if (queue_interval <= 0)
3158 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3165 case 'R': /* Synonymous with -qR... */
3166 receiving_message = FALSE;
3168 /* -Rf: As -R (below) but force all deliveries,
3169 -Rff: Ditto, but also thaw all frozen messages,
3170 -Rr: String is regex
3171 -Rrf: Regex and force
3172 -Rrff: Regex and force and thaw
3174 in all cases provided there are no further characters in this
3180 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3182 if (Ustrcmp(argrest, rsopts[i]) == 0)
3184 if (i != 2) queue_run_force = TRUE;
3185 if (i >= 2) deliver_selectstring_regex = TRUE;
3186 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3187 argrest += Ustrlen(rsopts[i]);
3192 /* -R: Set string to match in addresses for forced queue run to
3193 pick out particular messages. */
3197 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3199 fprintf(stderr, "exim: string expected after -R\n");
3203 else deliver_selectstring = argrest;
3207 /* -r: an obsolete synonym for -f (see above) */
3210 /* -S: Like -R but works on sender. */
3212 case 'S': /* Synonymous with -qS... */
3213 receiving_message = FALSE;
3215 /* -Sf: As -S (below) but force all deliveries,
3216 -Sff: Ditto, but also thaw all frozen messages,
3217 -Sr: String is regex
3218 -Srf: Regex and force
3219 -Srff: Regex and force and thaw
3221 in all cases provided there are no further characters in this
3227 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3229 if (Ustrcmp(argrest, rsopts[i]) == 0)
3231 if (i != 2) queue_run_force = TRUE;
3232 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3233 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3234 argrest += Ustrlen(rsopts[i]);
3239 /* -S: Set string to match in addresses for forced queue run to
3240 pick out particular messages. */
3244 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3246 fprintf(stderr, "exim: string expected after -S\n");
3250 else deliver_selectstring_sender = argrest;
3253 /* -Tqt is an option that is exclusively for use by the testing suite.
3254 It is not recognized in other circumstances. It allows for the setting up
3255 of explicit "queue times" so that various warning/retry things can be
3256 tested. Otherwise variability of clock ticks etc. cause problems. */
3259 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3260 fudged_queue_times = argv[++i];
3265 /* -t: Set flag to extract recipients from body of message. */
3268 if (*argrest == 0) extract_recipients = TRUE;
3270 /* -ti: Set flag to extract recipients from body of message, and also
3271 specify that dot does not end the message. */
3273 else if (Ustrcmp(argrest, "i") == 0)
3275 extract_recipients = TRUE;
3279 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3282 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3289 /* -U: This means "initial user submission" in sendmail, apparently. The
3290 doc claims that in future sendmail may refuse syntactically invalid
3291 messages instead of fixing them. For the moment, we just ignore it. */
3297 /* -v: verify things - this is a very low-level debugging */
3302 debug_selector |= D_v;
3303 debug_file = stderr;
3309 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3311 The -x flag tells the sendmail command that mail from a local
3312 mail program has National Language Support (NLS) extended characters
3313 in the body of the mail item. The sendmail command can send mail with
3314 extended NLS characters across networks that normally corrupts these
3317 As Exim is 8-bit clean, it just ignores this flag. */
3320 if (*argrest != 0) badarg = TRUE;
3323 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3324 logs to that file. We swallow the parameter and otherwise ignore it. */
3327 if (*argrest == '\0')
3331 fprintf(stderr, "exim: string expected after -X\n");
3337 /* All other initial characters are errors */
3342 } /* End of high-level switch statement */
3344 /* Failed to recognize the option, or syntax error */
3348 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3349 "option %s\n", arg);
3355 /* If -R or -S have been specified without -q, assume a single queue run. */
3357 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3358 queue_interval < 0) queue_interval = 0;
3362 /* If usage_wanted is set we call the usage function - which never returns */
3363 if (usage_wanted) exim_usage(called_as);
3365 /* Arguments have been processed. Check for incompatibilities. */
3367 (smtp_input || extract_recipients || recipients_arg < argc) &&
3368 (daemon_listen || queue_interval >= 0 || bi_option ||
3369 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3370 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3373 msg_action_arg > 0 &&
3374 (daemon_listen || queue_interval >= 0 || list_options ||
3375 (checking && msg_action != MSG_LOAD) ||
3376 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3379 (daemon_listen || queue_interval >= 0) &&
3380 (sender_address != NULL || list_options || list_queue || checking ||
3384 daemon_listen && queue_interval == 0
3387 inetd_wait_mode && queue_interval >= 0
3391 (checking || smtp_input || extract_recipients ||
3392 filter_test != FTEST_NONE || bi_option)
3395 verify_address_mode &&
3396 (address_test_mode || smtp_input || extract_recipients ||
3397 filter_test != FTEST_NONE || bi_option)
3400 address_test_mode && (smtp_input || extract_recipients ||
3401 filter_test != FTEST_NONE || bi_option)
3404 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3408 deliver_selectstring != NULL && queue_interval < 0
3411 msg_action == MSG_LOAD &&
3412 (!expansion_test || expansion_test_message != NULL)
3416 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3420 /* If debugging is set up, set the file and the file descriptor to pass on to
3421 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3422 to run in the foreground. */
3424 if (debug_selector != 0)
3426 debug_file = stderr;
3427 debug_fd = fileno(debug_file);
3428 background_daemon = FALSE;
3429 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3430 if (debug_selector != D_v) /* -v only doesn't show this */
3432 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3433 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3435 if (!version_printed)
3436 show_whats_supported(stderr);
3440 /* When started with root privilege, ensure that the limits on the number of
3441 open files and the number of processes (where that is accessible) are
3442 sufficiently large, or are unset, in case Exim has been called from an
3443 environment where the limits are screwed down. Not all OS have the ability to
3444 change some of these limits. */
3448 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3454 #ifdef RLIMIT_NOFILE
3455 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3457 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3459 rlp.rlim_cur = rlp.rlim_max = 0;
3462 /* I originally chose 1000 as a nice big number that was unlikely to
3463 be exceeded. It turns out that some older OS have a fixed upper limit of
3466 if (rlp.rlim_cur < 1000)
3468 rlp.rlim_cur = rlp.rlim_max = 1000;
3469 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3471 rlp.rlim_cur = rlp.rlim_max = 256;
3472 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3473 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3480 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3482 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3484 rlp.rlim_cur = rlp.rlim_max = 0;
3487 #ifdef RLIM_INFINITY
3488 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3490 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3492 if (rlp.rlim_cur < 1000)
3494 rlp.rlim_cur = rlp.rlim_max = 1000;
3496 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3497 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3503 /* Exim is normally entered as root (but some special configurations are
3504 possible that don't do this). However, it always spins off sub-processes that
3505 set their uid and gid as required for local delivery. We don't want to pass on
3506 any extra groups that root may belong to, so we want to get rid of them all at
3509 We need to obey setgroups() at this stage, before possibly giving up root
3510 privilege for a changed configuration file, but later on we might need to
3511 check on the additional groups for the admin user privilege - can't do that
3512 till after reading the config, which might specify the exim gid. Therefore,
3513 save the group list here first. */
3515 group_count = getgroups(NGROUPS_MAX, group_list);
3516 if (group_count < 0)
3518 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3522 /* There is a fundamental difference in some BSD systems in the matter of
3523 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3524 known not to be different. On the "different" systems there is a single group
3525 list, and the first entry in it is the current group. On all other versions of
3526 Unix there is a supplementary group list, which is in *addition* to the current
3527 group. Consequently, to get rid of all extraneous groups on a "standard" system
3528 you pass over 0 groups to setgroups(), while on a "different" system you pass
3529 over a single group - the current group, which is always the first group in the
3530 list. Calling setgroups() with zero groups on a "different" system results in
3531 an error return. The following code should cope with both types of system.
3533 However, if this process isn't running as root, setgroups() can't be used
3534 since you have to be root to run it, even if throwing away groups. Not being
3535 root here happens only in some unusual configurations. We just ignore the
3538 if (setgroups(0, NULL) != 0)
3540 if (setgroups(1, group_list) != 0 && !unprivileged)
3542 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3547 /* If the configuration file name has been altered by an argument on the
3548 command line (either a new file name or a macro definition) and the caller is
3549 not root, or if this is a filter testing run, remove any setuid privilege the
3550 program has and run as the underlying user.
3552 The exim user is locked out of this, which severely restricts the use of -C
3555 Otherwise, set the real ids to the effective values (should be root unless run
3556 from inetd, which it can either be root or the exim uid, if one is configured).
3558 There is a private mechanism for bypassing some of this, in order to make it
3559 possible to test lots of configurations automatically, without having either to
3560 recompile each time, or to patch in an actual configuration file name and other
3561 values (such as the path name). If running in the test harness, pretend that
3562 configuration file changes and macro definitions haven't happened. */
3565 (!trusted_config || /* Config changed, or */
3566 !macros_trusted()) && /* impermissible macros and */
3567 real_uid != root_uid && /* Not root, and */
3568 !running_in_test_harness /* Not fudged */
3570 expansion_test /* expansion testing */
3572 filter_test != FTEST_NONE) /* Filter testing */
3574 setgroups(group_count, group_list);
3575 exim_setugid(real_uid, real_gid, FALSE,
3576 US"-C, -D, -be or -bf forces real uid");
3577 removed_privilege = TRUE;
3579 /* In the normal case when Exim is called like this, stderr is available
3580 and should be used for any logging information because attempts to write
3581 to the log will usually fail. To arrange this, we unset really_exim. However,
3582 if no stderr is available there is no point - we might as well have a go
3583 at the log (if it fails, syslog will be written).
3585 Note that if the invoker is Exim, the logs remain available. Messing with
3586 this causes unlogged successful deliveries. */
3588 if ((log_stderr != NULL) && (real_uid != exim_uid))
3589 really_exim = FALSE;
3592 /* Privilege is to be retained for the moment. It may be dropped later,
3593 depending on the job that this Exim process has been asked to do. For now, set
3594 the real uid to the effective so that subsequent re-execs of Exim are done by a
3597 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3599 /* If testing a filter, open the file(s) now, before wasting time doing other
3600 setups and reading the message. */
3602 if ((filter_test & FTEST_SYSTEM) != 0)
3604 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3607 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3609 return EXIT_FAILURE;
3613 if ((filter_test & FTEST_USER) != 0)
3615 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3618 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3620 return EXIT_FAILURE;
3624 /* Initialise lookup_list
3625 If debugging, already called above via version reporting.
3626 In either case, we initialise the list of available lookups while running
3627 as root. All dynamically modules are loaded from a directory which is
3628 hard-coded into the binary and is code which, if not a module, would be
3629 part of Exim already. Ability to modify the content of the directory
3630 is equivalent to the ability to modify a setuid binary!
3632 This needs to happen before we read the main configuration. */
3635 /* Read the main runtime configuration data; this gives up if there
3636 is a failure. It leaves the configuration file open so that the subsequent
3637 configuration data for delivery can be read if needed. */
3641 /* If an action on specific messages is requested, or if a daemon or queue
3642 runner is being started, we need to know if Exim was called by an admin user.
3643 This is the case if the real user is root or exim, or if the real group is
3644 exim, or if one of the supplementary groups is exim or a group listed in
3645 admin_groups. We don't fail all message actions immediately if not admin_user,
3646 since some actions can be performed by non-admin users. Instead, set admin_user
3647 for later interrogation. */
3649 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3654 for (i = 0; i < group_count; i++)
3656 if (group_list[i] == exim_gid) admin_user = TRUE;
3657 else if (admin_groups != NULL)
3659 for (j = 1; j <= (int)(admin_groups[0]); j++)
3660 if (admin_groups[j] == group_list[i])
3661 { admin_user = TRUE; break; }
3663 if (admin_user) break;
3667 /* Another group of privileged users are the trusted users. These are root,
3668 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3669 are permitted to specify sender_addresses with -f on the command line, and
3670 other message parameters as well. */
3672 if (real_uid == root_uid || real_uid == exim_uid)
3673 trusted_caller = TRUE;
3678 if (trusted_users != NULL)
3680 for (i = 1; i <= (int)(trusted_users[0]); i++)
3681 if (trusted_users[i] == real_uid)
3682 { trusted_caller = TRUE; break; }
3685 if (!trusted_caller && trusted_groups != NULL)
3687 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3689 if (trusted_groups[i] == real_gid)
3690 trusted_caller = TRUE;
3691 else for (j = 0; j < group_count; j++)
3693 if (trusted_groups[i] == group_list[j])
3694 { trusted_caller = TRUE; break; }
3696 if (trusted_caller) break;
3701 /* Handle the decoding of logging options. */
3703 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3704 log_selector_string, log_options, log_options_count, US"log", 0);
3708 debug_printf("configuration file is %s\n", config_main_filename);
3709 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3710 log_extra_selector);
3713 /* If domain literals are not allowed, check the sender address that was
3714 supplied with -f. Ditto for a stripped trailing dot. */
3716 if (sender_address != NULL)
3718 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3720 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3721 "allowed\n", sender_address);
3722 return EXIT_FAILURE;
3724 if (f_end_dot && !strip_trailing_dot)
3726 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3727 "(trailing dot not allowed)\n", sender_address);
3728 return EXIT_FAILURE;
3732 /* See if an admin user overrode our logging. */
3734 if (cmdline_syslog_name != NULL)
3738 syslog_processname = cmdline_syslog_name;
3739 log_file_path = string_copy(CUS"syslog");
3743 /* not a panic, non-privileged users should not be able to spam paniclog */
3745 "exim: you lack sufficient privilege to specify syslog process name\n");
3746 return EXIT_FAILURE;
3750 /* Paranoia check of maximum lengths of certain strings. There is a check
3751 on the length of the log file path in log.c, which will come into effect
3752 if there are any calls to write the log earlier than this. However, if we
3753 get this far but the string is very long, it is better to stop now than to
3754 carry on and (e.g.) receive a message and then have to collapse. The call to
3755 log_write() from here will cause the ultimate panic collapse if the complete
3756 file name exceeds the buffer length. */
3758 if (Ustrlen(log_file_path) > 200)
3759 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3760 "log_file_path is longer than 200 chars: aborting");
3762 if (Ustrlen(pid_file_path) > 200)
3763 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3764 "pid_file_path is longer than 200 chars: aborting");
3766 if (Ustrlen(spool_directory) > 200)
3767 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3768 "spool_directory is longer than 200 chars: aborting");
3770 /* Length check on the process name given to syslog for its TAG field,
3771 which is only permitted to be 32 characters or less. See RFC 3164. */
3773 if (Ustrlen(syslog_processname) > 32)
3774 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3775 "syslog_processname is longer than 32 chars: aborting");
3777 /* In some operating systems, the environment variable TMPDIR controls where
3778 temporary files are created; Exim doesn't use these (apart from when delivering
3779 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3780 If TMPDIR is found in the environment, reset it to the value defined in the
3781 TMPDIR macro, if this macro is defined. */
3786 for (p = USS environ; *p != NULL; p++)
3788 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3789 Ustrcmp(*p+7, TMPDIR) != 0)
3791 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3792 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3794 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3800 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3801 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3802 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3803 called by a user who has set the TZ variable. This then affects the timestamps
3804 in log files and in Received: headers, and any created Date: header lines. The
3805 required timezone is settable in the configuration file, so nothing can be done
3806 about this earlier - but hopefully nothing will normally be logged earlier than
3807 this. We have to make a new environment if TZ is wrong, but don't bother if
3808 timestamps_utc is set, because then all times are in UTC anyway. */
3810 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3812 timestamps_utc = TRUE;
3816 uschar *envtz = US getenv("TZ");
3817 if ((envtz == NULL && timezone_string != NULL) ||
3819 (timezone_string == NULL ||
3820 Ustrcmp(timezone_string, envtz) != 0)))
3822 uschar **p = USS environ;
3826 while (*p++ != NULL) count++;
3827 if (envtz == NULL) count++;
3828 newp = new = malloc(sizeof(uschar *) * (count + 1));
3829 for (p = USS environ; *p != NULL; p++)
3831 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3834 if (timezone_string != NULL)
3836 *newp = malloc(Ustrlen(timezone_string) + 4);
3837 sprintf(CS *newp++, "TZ=%s", timezone_string);
3842 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3843 tod_stamp(tod_log));
3847 /* Handle the case when we have removed the setuid privilege because of -C or
3848 -D. This means that the caller of Exim was not root.
3850 There is a problem if we were running as the Exim user. The sysadmin may
3851 expect this case to retain privilege because "the binary was called by the
3852 Exim user", but it hasn't, because either the -D option set macros, or the
3853 -C option set a non-trusted configuration file. There are two possibilities:
3855 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3856 to do message deliveries. Thus, the fact that it is running as a
3857 non-privileged user is plausible, and might be wanted in some special
3858 configurations. However, really_exim will have been set false when
3859 privilege was dropped, to stop Exim trying to write to its normal log
3860 files. Therefore, re-enable normal log processing, assuming the sysadmin
3861 has set up the log directory correctly.
3863 (2) If deliver_drop_privilege is not set, the configuration won't work as
3864 apparently intended, and so we log a panic message. In order to retain
3865 root for -C or -D, the caller must either be root or be invoking a
3866 trusted configuration file (when deliver_drop_privilege is false). */
3868 if (removed_privilege && (!trusted_config || macros != NULL) &&
3869 real_uid == exim_uid)
3871 if (deliver_drop_privilege)
3872 really_exim = TRUE; /* let logging work normally */
3874 log_write(0, LOG_MAIN|LOG_PANIC,
3875 "exim user lost privilege for using %s option",
3876 trusted_config? "-D" : "-C");
3879 /* Start up Perl interpreter if Perl support is configured and there is a
3880 perl_startup option, and the configuration or the command line specifies
3881 initializing starting. Note that the global variables are actually called
3882 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3885 if (perl_start_option != 0)
3886 opt_perl_at_start = (perl_start_option > 0);
3887 if (opt_perl_at_start && opt_perl_startup != NULL)
3890 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3891 errstr = init_perl(opt_perl_startup);
3894 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3895 return EXIT_FAILURE;
3897 opt_perl_started = TRUE;
3899 #endif /* EXIM_PERL */
3901 /* Log the arguments of the call if the configuration file said so. This is
3902 a debugging feature for finding out what arguments certain MUAs actually use.
3903 Don't attempt it if logging is disabled, or if listing variables or if
3904 verifying/testing addresses or expansions. */
3906 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3907 && really_exim && !list_options && !checking)
3910 uschar *p = big_buffer;
3912 Ustrcpy(p, "cwd= (failed)");
3913 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3915 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3917 for (i = 0; i < argc; i++)
3919 int len = Ustrlen(argv[i]);
3922 if (p + len + 8 >= big_buffer + big_buffer_size)
3925 log_write(0, LOG_MAIN, "%s", big_buffer);
3926 Ustrcpy(big_buffer, "...");
3929 printing = string_printing(argv[i]);
3930 if (printing[0] == 0) quote = US"\""; else
3932 uschar *pp = printing;
3934 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3936 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3937 (p - big_buffer) - 4), printing, quote);
3941 if ((log_extra_selector & LX_arguments) != 0)
3942 log_write(0, LOG_MAIN, "%s", big_buffer);
3944 debug_printf("%s\n", big_buffer);
3947 /* Set the working directory to be the top-level spool directory. We don't rely
3948 on this in the code, which always uses fully qualified names, but it's useful
3949 for core dumps etc. Don't complain if it fails - the spool directory might not
3950 be generally accessible and calls with the -C option (and others) have lost
3951 privilege by now. Before the chdir, we try to ensure that the directory exists.
3954 if (Uchdir(spool_directory) != 0)
3957 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3958 dummy = /* quieten compiler */ Uchdir(spool_directory);
3961 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3962 alias file. Exim doesn't have such a concept, but this call is screwed into
3963 Sun's YP makefiles. Handle this by calling a configured script, as the real
3964 user who called Exim. The -oA option can be used to pass an argument to the
3969 (void)fclose(config_file);
3970 if (bi_command != NULL)
3974 argv[i++] = bi_command;
3975 if (alias_arg != NULL) argv[i++] = alias_arg;
3978 setgroups(group_count, group_list);
3979 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3981 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3982 (argv[1] == NULL)? US"" : argv[1]);
3984 execv(CS argv[0], (char *const *)argv);
3985 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3990 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3995 /* We moved the admin/trusted check to be immediately after reading the
3996 configuration file. We leave these prints here to ensure that syslog setup,
3997 logfile setup, and so on has already happened. */
3999 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4000 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4002 /* Only an admin user may start the daemon or force a queue run in the default
4003 configuration, but the queue run restriction can be relaxed. Only an admin
4004 user may request that a message be returned to its sender forthwith. Only an
4005 admin user may specify a debug level greater than D_v (because it might show
4006 passwords, etc. in lookup queries). Only an admin user may request a queue
4007 count. Only an admin user can use the test interface to scan for email
4008 (because Exim will be in the spool dir and able to look at mails). */
4012 BOOL debugset = (debug_selector & ~D_v) != 0;
4013 if (deliver_give_up || daemon_listen || malware_test_file ||
4014 (count_queue && queue_list_requires_admin) ||
4015 (list_queue && queue_list_requires_admin) ||
4016 (queue_interval >= 0 && prod_requires_admin) ||
4017 (debugset && !running_in_test_harness))
4019 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4024 /* If the real user is not root or the exim uid, the argument for passing
4025 in an open TCP/IP connection for another message is not permitted, nor is
4026 running with the -N option for any delivery action, unless this call to exim is
4027 one that supplied an input message, or we are using a patched exim for
4028 regression testing. */
4030 if (real_uid != root_uid && real_uid != exim_uid &&
4031 (continue_hostname != NULL ||
4033 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4034 )) && !running_in_test_harness)
4036 fprintf(stderr, "exim: Permission denied\n");
4037 return EXIT_FAILURE;
4040 /* If the caller is not trusted, certain arguments are ignored when running for
4041 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4042 Note that authority for performing certain actions on messages is tested in the
4043 queue_action() function. */
4045 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4047 sender_host_name = sender_host_address = interface_address =
4048 sender_ident = received_protocol = NULL;
4049 sender_host_port = interface_port = 0;
4050 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4053 /* If a sender host address is set, extract the optional port number off the
4054 end of it and check its syntax. Do the same thing for the interface address.
4055 Exim exits if the syntax is bad. */
4059 if (sender_host_address != NULL)
4060 sender_host_port = check_port(sender_host_address);
4061 if (interface_address != NULL)
4062 interface_port = check_port(interface_address);
4065 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4070 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4071 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4075 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4076 return EXIT_FAILURE;
4080 /* If an SMTP message is being received check to see if the standard input is a
4081 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4082 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4087 union sockaddr_46 inetd_sock;
4088 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4089 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4091 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4092 if (family == AF_INET || family == AF_INET6)
4094 union sockaddr_46 interface_sock;
4095 size = sizeof(interface_sock);
4097 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4098 interface_address = host_ntoa(-1, &interface_sock, NULL,
4101 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4103 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4106 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4107 NULL, &sender_host_port);
4108 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4109 "inetd is not supported when mua_wrapper is set");
4114 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4115 return EXIT_FAILURE;
4121 /* If the load average is going to be needed while receiving a message, get it
4122 now for those OS that require the first call to os_getloadavg() to be done as
4123 root. There will be further calls later for each message received. */
4125 #ifdef LOAD_AVG_NEEDS_ROOT
4126 if (receiving_message &&
4127 (queue_only_load >= 0 ||
4128 (is_inetd && smtp_load_reserve >= 0)
4131 load_average = OS_GETLOADAVG();
4135 /* The queue_only configuration option can be overridden by -odx on the command
4136 line, except that if queue_only_override is false, queue_only cannot be unset
4137 from the command line. */
4139 if (queue_only_set && (queue_only_override || arg_queue_only))
4140 queue_only = arg_queue_only;
4142 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4145 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4146 if (arg_smtp_receive_timeout >= 0)
4147 smtp_receive_timeout = arg_smtp_receive_timeout;
4149 /* If Exim was started with root privilege, unless we have already removed the
4150 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4151 except when starting the daemon or doing some kind of delivery or address
4152 testing (-bt). These are the only cases when root need to be retained. We run
4153 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4154 retained only for starting the daemon. We always do the initgroups() in this
4155 situation (controlled by the TRUE below), in order to be as close as possible
4156 to the state Exim usually runs in. */
4158 if (!unprivileged && /* originally had root AND */
4159 !removed_privilege && /* still got root AND */
4160 !daemon_listen && /* not starting the daemon */
4161 queue_interval <= 0 && /* (either kind of daemon) */
4163 deliver_drop_privilege || /* requested unprivileged */
4165 queue_interval < 0 && /* not running the queue */
4166 (msg_action_arg < 0 || /* and */
4167 msg_action != MSG_DELIVER) && /* not delivering and */
4168 (!checking || !address_test_mode) /* not address checking */
4172 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4175 /* When we are retaining a privileged uid, we still change to the exim gid. */
4180 rv = setgid(exim_gid);
4181 /* Impact of failure is that some stuff might end up with an incorrect group.
4182 We track this for failures from root, since any attempt to change privilege
4183 by root should succeed and failures should be examined. For non-root,
4184 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4185 no need to complain then. */
4188 if (!(unprivileged || removed_privilege))
4191 "exim: changing group failed: %s\n", strerror(errno));
4195 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4196 (long int)exim_gid, strerror(errno));
4200 /* Handle a request to scan a file for malware */
4201 if (malware_test_file)
4203 #ifdef WITH_CONTENT_SCAN
4205 set_process_info("scanning file for malware");
4206 result = malware_in_file(malware_test_file);
4209 printf("No malware found.\n");
4214 printf("Malware lookup returned non-okay/fail: %d\n", result);
4218 printf("Malware found: %s\n", malware_name);
4220 printf("Malware scan detected malware of unknown name.\n");
4222 printf("Malware scanning not enabled at compile time.\n");
4227 /* Handle a request to list the delivery queue */
4231 set_process_info("listing the queue");
4232 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4236 /* Handle a request to count the delivery queue */
4240 set_process_info("counting the queue");
4245 /* Handle actions on specific messages, except for the force delivery and
4246 message load actions, which are done below. Some actions take a whole list of
4247 message ids, which are known to continue up to the end of the arguments. Others
4248 take a single message id and then operate on the recipients list. */
4250 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4252 int yield = EXIT_SUCCESS;
4253 set_process_info("acting on specified messages");
4255 if (!one_msg_action)
4257 for (i = msg_action_arg; i < argc; i++)
4258 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4259 yield = EXIT_FAILURE;
4262 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4263 recipients_arg)) yield = EXIT_FAILURE;
4267 /* All the modes below here require the remaining configuration sections
4268 to be read, except that we can skip over the ACL setting when delivering
4269 specific messages, or doing a queue run. (For various testing cases we could
4270 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4273 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4275 /* The configuration data will have been read into POOL_PERM because we won't
4276 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4277 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4278 configuration were read into POOL_MAIN, because we don't do any resets till
4279 later on. However, it seems right, and it does ensure that both pools get used.
4282 store_pool = POOL_MAIN;
4284 /* Handle the -brt option. This is for checking out retry configurations.
4285 The next three arguments are a domain name or a complete address, and
4286 optionally two error numbers. All it does is to call the function that
4287 scans the retry configuration data. */
4289 if (test_retry_arg >= 0)
4291 retry_config *yield;
4292 int basic_errno = 0;
4296 if (test_retry_arg >= argc)
4298 printf("-brt needs a domain or address argument\n");
4299 exim_exit(EXIT_FAILURE);
4301 s1 = argv[test_retry_arg++];
4304 /* If the first argument contains no @ and no . it might be a local user
4305 or it might be a single-component name. Treat as a domain. */
4307 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4309 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4310 "being \ntreated as a one-component domain, not as a local part.\n\n",
4314 /* There may be an optional second domain arg. */
4316 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4317 s2 = argv[test_retry_arg++];
4319 /* The final arg is an error name */
4321 if (test_retry_arg < argc)
4323 uschar *ss = argv[test_retry_arg];
4325 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4328 printf("%s\n", CS error);
4329 return EXIT_FAILURE;
4332 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4333 code > 100 as an error is for matching codes to the decade. Turn them into
4334 a real error code, off the decade. */
4336 if (basic_errno == ERRNO_MAIL4XX ||
4337 basic_errno == ERRNO_RCPT4XX ||
4338 basic_errno == ERRNO_DATA4XX)
4340 int code = (more_errno >> 8) & 255;
4342 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4343 else if (code > 100)
4344 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4348 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4349 if (yield == NULL) printf("No retry information found\n"); else
4352 more_errno = yield->more_errno;
4353 printf("Retry rule: %s ", yield->pattern);
4355 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4357 printf("quota%s%s ",
4358 (more_errno > 0)? "_" : "",
4359 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4361 else if (yield->basic_errno == ECONNREFUSED)
4363 printf("refused%s%s ",
4364 (more_errno > 0)? "_" : "",
4365 (more_errno == 'M')? "MX" :
4366 (more_errno == 'A')? "A" : "");
4368 else if (yield->basic_errno == ETIMEDOUT)
4371 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4373 if (more_errno != 0) printf("_%s",
4374 (more_errno == 'M')? "MX" : "A");
4377 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4378 printf("auth_failed ");
4381 for (r = yield->rules; r != NULL; r = r->next)
4383 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4384 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4390 printf(",%d.", x/1000);
4404 exim_exit(EXIT_SUCCESS);
4407 /* Handle a request to list one or more configuration options */
4408 /* If -n was set, we suppress some information */
4412 set_process_info("listing variables");
4413 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4414 else for (i = recipients_arg; i < argc; i++)
4417 (Ustrcmp(argv[i], "router") == 0 ||
4418 Ustrcmp(argv[i], "transport") == 0 ||
4419 Ustrcmp(argv[i], "authenticator") == 0 ||
4420 Ustrcmp(argv[i], "macro") == 0))
4422 readconf_print(argv[i+1], argv[i], flag_n);
4425 else readconf_print(argv[i], NULL, flag_n);
4427 exim_exit(EXIT_SUCCESS);
4431 /* Handle a request to deliver one or more messages that are already on the
4432 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4433 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4435 Delivery of specific messages is typically used for a small number when
4436 prodding by hand (when the option forced_delivery will be set) or when
4437 re-execing to regain root privilege. Each message delivery must happen in a
4438 separate process, so we fork a process for each one, and run them sequentially
4439 so that debugging output doesn't get intertwined, and to avoid spawning too
4440 many processes if a long list is given. However, don't fork for the last one;
4441 this saves a process in the common case when Exim is called to deliver just one
4444 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4446 if (prod_requires_admin && !admin_user)
4448 fprintf(stderr, "exim: Permission denied\n");
4449 exim_exit(EXIT_FAILURE);
4451 set_process_info("delivering specified messages");
4452 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4453 for (i = msg_action_arg; i < argc; i++)
4458 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4459 else if ((pid = fork()) == 0)
4461 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4462 _exit(EXIT_SUCCESS);
4466 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4468 exim_exit(EXIT_FAILURE);
4472 exim_exit(EXIT_SUCCESS);
4476 /* If only a single queue run is requested, without SMTP listening, we can just
4477 turn into a queue runner, with an optional starting message id. */
4479 if (queue_interval == 0 && !daemon_listen)
4481 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4482 (start_queue_run_id == NULL)? US"" : US" starting at ",
4483 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4484 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4485 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4486 set_process_info("running the queue (single queue run)");
4487 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4488 exim_exit(EXIT_SUCCESS);
4492 /* Find the login name of the real user running this process. This is always
4493 needed when receiving a message, because it is written into the spool file. It
4494 may also be used to construct a from: or a sender: header, and in this case we
4495 need the user's full name as well, so save a copy of it, checked for RFC822
4496 syntax and munged if necessary, if it hasn't previously been set by the -F
4497 argument. We may try to get the passwd entry more than once, in case NIS or
4498 other delays are in evidence. Save the home directory for use in filter testing
4503 if ((pw = getpwuid(real_uid)) != NULL)
4505 originator_login = string_copy(US pw->pw_name);
4506 originator_home = string_copy(US pw->pw_dir);
4508 /* If user name has not been set by -F, set it from the passwd entry
4509 unless -f has been used to set the sender address by a trusted user. */
4511 if (originator_name == NULL)
4513 if (sender_address == NULL ||
4514 (!trusted_caller && filter_test == FTEST_NONE))
4516 uschar *name = US pw->pw_gecos;
4517 uschar *amp = Ustrchr(name, '&');
4520 /* Most Unix specify that a '&' character in the gecos field is
4521 replaced by a copy of the login name, and some even specify that
4522 the first character should be upper cased, so that's what we do. */
4527 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4528 amp - name, name, &loffset, originator_login, amp + 1);
4529 buffer[loffset] = toupper(buffer[loffset]);
4533 /* If a pattern for matching the gecos field was supplied, apply
4534 it and then expand the name string. */
4536 if (gecos_pattern != NULL && gecos_name != NULL)
4539 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4541 if (regex_match_and_setup(re, name, 0, -1))
4543 uschar *new_name = expand_string(gecos_name);
4545 if (new_name != NULL)
4547 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4548 "gecos field \"%s\"\n", new_name, name);
4551 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4552 "\"%s\": %s\n", gecos_name, expand_string_message);
4554 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4555 "gecos field \"%s\"\n", gecos_pattern, name);
4556 store_free((void *)re);
4558 originator_name = string_copy(name);
4561 /* A trusted caller has used -f but not -F */
4563 else originator_name = US"";
4566 /* Break the retry loop */
4571 if (++i > finduser_retries) break;
4575 /* If we cannot get a user login, log the incident and give up, unless the
4576 configuration specifies something to use. When running in the test harness,
4577 any setting of unknown_login overrides the actual name. */
4579 if (originator_login == NULL || running_in_test_harness)
4581 if (unknown_login != NULL)
4583 originator_login = expand_string(unknown_login);
4584 if (originator_name == NULL && unknown_username != NULL)
4585 originator_name = expand_string(unknown_username);
4586 if (originator_name == NULL) originator_name = US"";
4588 if (originator_login == NULL)
4589 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4593 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4596 originator_name = string_copy(parse_fix_phrase(originator_name,
4597 Ustrlen(originator_name), big_buffer, big_buffer_size));
4599 /* If a message is created by this call of Exim, the uid/gid of its originator
4600 are those of the caller. These values are overridden if an existing message is
4601 read in from the spool. */
4603 originator_uid = real_uid;
4604 originator_gid = real_gid;
4606 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4607 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4609 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4610 returns. We leave this till here so that the originator_ fields are available
4611 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4614 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4618 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4619 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4620 "mua_wrapper is set");
4625 /* If the sender ident has not been set (by a trusted caller) set it to
4626 the caller. This will get overwritten below for an inetd call. If a trusted
4627 caller has set it empty, unset it. */
4629 if (sender_ident == NULL) sender_ident = originator_login;
4630 else if (sender_ident[0] == 0) sender_ident = NULL;
4632 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4633 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4634 originator_* variables set. */
4636 if (test_rewrite_arg >= 0)
4638 really_exim = FALSE;
4639 if (test_rewrite_arg >= argc)
4641 printf("-brw needs an address argument\n");
4642 exim_exit(EXIT_FAILURE);
4644 rewrite_test(argv[test_rewrite_arg]);
4645 exim_exit(EXIT_SUCCESS);
4648 /* A locally-supplied message is considered to be coming from a local user
4649 unless a trusted caller supplies a sender address with -f, or is passing in the
4650 message via SMTP (inetd invocation or otherwise). */
4652 if ((sender_address == NULL && !smtp_input) ||
4653 (!trusted_caller && filter_test == FTEST_NONE))
4655 sender_local = TRUE;
4657 /* A trusted caller can supply authenticated_sender and authenticated_id
4658 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4659 defaults except when host checking. */
4661 if (authenticated_sender == NULL && !host_checking)
4662 authenticated_sender = string_sprintf("%s@%s", originator_login,
4663 qualify_domain_sender);
4664 if (authenticated_id == NULL && !host_checking)
4665 authenticated_id = originator_login;
4668 /* Trusted callers are always permitted to specify the sender address.
4669 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4670 is specified is the empty address. However, if a trusted caller does not
4671 specify a sender address for SMTP input, we leave sender_address unset. This
4672 causes the MAIL commands to be honoured. */
4674 if ((!smtp_input && sender_address == NULL) ||
4675 !receive_check_set_sender(sender_address))
4677 /* Either the caller is not permitted to set a general sender, or this is
4678 non-SMTP input and the trusted caller has not set a sender. If there is no
4679 sender, or if a sender other than <> is set, override with the originator's
4680 login (which will get qualified below), except when checking things. */
4682 if (sender_address == NULL /* No sender_address set */
4684 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4685 !checking && /* Not running tests, AND */
4686 filter_test == FTEST_NONE)) /* Not testing a filter */
4688 sender_address = originator_login;
4689 sender_address_forced = FALSE;
4690 sender_address_domain = 0;
4694 /* Remember whether an untrusted caller set the sender address */
4696 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4698 /* Ensure that the sender address is fully qualified unless it is the empty
4699 address, which indicates an error message, or doesn't exist (root caller, smtp
4700 interface, no -f argument). */
4702 if (sender_address != NULL && sender_address[0] != 0 &&
4703 sender_address_domain == 0)
4704 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4705 qualify_domain_sender);
4707 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4709 /* Handle a request to verify a list of addresses, or test them for delivery.
4710 This must follow the setting of the sender address, since routers can be
4711 predicated upon the sender. If no arguments are given, read addresses from
4712 stdin. Set debug_level to at least D_v to get full output for address testing.
4715 if (verify_address_mode || address_test_mode)
4718 int flags = vopt_qualify;
4720 if (verify_address_mode)
4722 if (!verify_as_sender) flags |= vopt_is_recipient;
4723 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4728 flags |= vopt_is_recipient;
4729 debug_selector |= D_v;
4730 debug_file = stderr;
4731 debug_fd = fileno(debug_file);
4732 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4735 if (recipients_arg < argc)
4737 while (recipients_arg < argc)
4739 uschar *s = argv[recipients_arg++];
4742 BOOL finished = FALSE;
4743 uschar *ss = parse_find_address_end(s, FALSE);
4744 if (*ss == ',') *ss = 0; else finished = TRUE;
4745 test_address(s, flags, &exit_value);
4748 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4755 uschar *s = get_stdinput(NULL, NULL);
4756 if (s == NULL) break;
4757 test_address(s, flags, &exit_value);
4761 exim_exit(exit_value);
4764 /* Handle expansion checking. Either expand items on the command line, or read
4765 from stdin if there aren't any. If -Mset was specified, load the message so
4766 that its variables can be used, but restrict this facility to admin users.
4767 Otherwise, if -bem was used, read a message from stdin. */
4771 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4773 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4776 fprintf(stderr, "exim: permission denied\n");
4779 message_id = argv[msg_action_arg];
4780 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4781 if (!spool_open_datafile(message_id))
4782 printf ("Failed to load message datafile %s\n", message_id);
4783 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4784 printf ("Failed to load message %s\n", message_id);
4787 /* Read a test message from a file. We fudge it up to be on stdin, saving
4788 stdin itself for later reading of expansion strings. */
4790 else if (expansion_test_message != NULL)
4792 int save_stdin = dup(0);
4793 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4796 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4798 return EXIT_FAILURE;
4801 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4802 message_ended = END_NOTENDED;
4803 read_message_body(receive_msg(extract_recipients));
4804 message_linecount += body_linecount;
4805 (void)dup2(save_stdin, 0);
4806 (void)close(save_stdin);
4807 clearerr(stdin); /* Required by Darwin */
4810 /* Allow $recipients for this testing */
4812 enable_dollar_recipients = TRUE;
4814 /* Expand command line items */
4816 if (recipients_arg < argc)
4818 while (recipients_arg < argc)
4820 uschar *s = argv[recipients_arg++];
4821 uschar *ss = expand_string(s);
4822 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4823 else printf("%s\n", CS ss);
4831 char *(*fn_readline)(const char *) = NULL;
4832 void (*fn_addhist)(const char *) = NULL;
4835 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4841 uschar *source = get_stdinput(fn_readline, fn_addhist);
4842 if (source == NULL) break;
4843 ss = expand_string(source);
4845 printf ("Failed: %s\n", expand_string_message);
4846 else printf("%s\n", CS ss);
4850 if (dlhandle != NULL) dlclose(dlhandle);
4854 /* The data file will be open after -Mset */
4856 if (deliver_datafile >= 0)
4858 (void)close(deliver_datafile);
4859 deliver_datafile = -1;
4862 exim_exit(EXIT_SUCCESS);
4866 /* The active host name is normally the primary host name, but it can be varied
4867 for hosts that want to play several parts at once. We need to ensure that it is
4868 set for host checking, and for receiving messages. */
4870 smtp_active_hostname = primary_hostname;
4871 if (raw_active_hostname != NULL)
4873 uschar *nah = expand_string(raw_active_hostname);
4876 if (!expand_string_forcedfail)
4877 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4878 "(smtp_active_hostname): %s", raw_active_hostname,
4879 expand_string_message);
4881 else if (nah[0] != 0) smtp_active_hostname = nah;
4884 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4885 given IP address so that the blocking and relay configuration can be tested.
4886 Unless a sender_ident was set by -oMt, we discard it (the default is the
4887 caller's login name). An RFC 1413 call is made only if we are running in the
4888 test harness and an incoming interface and both ports are specified, because
4889 there is no TCP/IP call to find the ident for. */
4896 if (!sender_ident_set)
4898 sender_ident = NULL;
4899 if (running_in_test_harness && sender_host_port != 0 &&
4900 interface_address != NULL && interface_port != 0)
4901 verify_get_ident(1413);
4904 /* In case the given address is a non-canonical IPv6 address, canonicize
4905 it. The code works for both IPv4 and IPv6, as it happens. */
4907 size = host_aton(sender_host_address, x);
4908 sender_host_address = store_get(48); /* large enough for full IPv6 */
4909 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4911 /* Now set up for testing */
4913 host_build_sender_fullhost();
4917 sender_local = FALSE;
4918 sender_host_notsocket = TRUE;
4919 debug_file = stderr;
4920 debug_fd = fileno(debug_file);
4921 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4922 "**** but without any ident (RFC 1413) callback.\n"
4923 "**** This is not for real!\n\n",
4924 sender_host_address);
4926 if (verify_check_host(&hosts_connection_nolog) == OK)
4927 log_write_selector &= ~L_smtp_connection;
4928 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4930 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4931 because a log line has already been written for all its failure exists
4932 (usually "connection refused: <reason>") and writing another one is
4933 unnecessary clutter. */
4935 if (smtp_start_session())
4937 reset_point = store_get(0);
4940 store_reset(reset_point);
4941 if (smtp_setup_msg() <= 0) break;
4942 if (!receive_msg(FALSE)) break;
4946 exim_exit(EXIT_SUCCESS);
4950 /* Arrange for message reception if recipients or SMTP were specified;
4951 otherwise complain unless a version print (-bV) happened or this is a filter
4952 verification test or info dump.
4953 In the former case, show the configuration file name. */
4955 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4957 if (version_printed)
4959 printf("Configuration file is %s\n", config_main_filename);
4960 return EXIT_SUCCESS;
4963 if (info_flag != CMDINFO_NONE)
4965 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4966 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4969 if (filter_test == FTEST_NONE)
4970 exim_usage(called_as);
4974 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4975 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4976 that we are not called from inetd, because that is rejected above. The
4977 following configuration settings are forced here:
4979 (1) Synchronous delivery (-odi)
4980 (2) Errors to stderr (-oep == -oeq)
4981 (3) No parallel remote delivery
4982 (4) Unprivileged delivery
4984 We don't force overall queueing options because there are several of them;
4985 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4986 to override any SMTP queueing. */
4990 synchronous_delivery = TRUE;
4991 arg_error_handling = ERRORS_STDERR;
4992 remote_max_parallel = 1;
4993 deliver_drop_privilege = TRUE;
4995 queue_smtp_domains = NULL;
4999 /* Prepare to accept one or more new messages on the standard input. When a
5000 message has been read, its id is returned in message_id[]. If doing immediate
5001 delivery, we fork a delivery process for each received message, except for the
5002 last one, where we can save a process switch.
5004 It is only in non-smtp mode that error_handling is allowed to be changed from
5005 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5006 sendmail error modes other than -oem ever actually used? Later: yes.) */
5008 if (!smtp_input) error_handling = arg_error_handling;
5010 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5011 logging being sent down the socket and make an identd call to get the
5016 (void)fclose(stderr);
5017 exim_nullstd(); /* Re-open to /dev/null */
5018 verify_get_ident(IDENT_PORT);
5019 host_build_sender_fullhost();
5020 set_process_info("handling incoming connection from %s via inetd",
5024 /* If the sender host address has been set, build sender_fullhost if it hasn't
5025 already been done (which it will have been for inetd). This caters for the
5026 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5027 so that the test for IP options is skipped for -bs input. */
5029 if (sender_host_address != NULL && sender_fullhost == NULL)
5031 host_build_sender_fullhost();
5032 set_process_info("handling incoming connection from %s via -oMa",
5034 sender_host_notsocket = TRUE;
5037 /* Otherwise, set the sender host as unknown except for inetd calls. This
5038 prevents host checking in the case of -bs not from inetd and also for -bS. */
5040 else if (!is_inetd) sender_host_unknown = TRUE;
5042 /* If stdout does not exist, then dup stdin to stdout. This can happen
5043 if exim is started from inetd. In this case fd 0 will be set to the socket,
5044 but fd 1 will not be set. This also happens for passed SMTP channels. */
5046 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5048 /* Set up the incoming protocol name and the state of the program. Root is
5049 allowed to force received protocol via the -oMr option above. If we have come
5050 via inetd, the process info has already been set up. We don't set
5051 received_protocol here for smtp input, as it varies according to
5052 batch/HELO/EHLO/AUTH/TLS. */
5056 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5057 smtp_batched_input? "batched " : "",
5058 (sender_address!= NULL)? sender_address : originator_login);
5062 if (received_protocol == NULL)
5063 received_protocol = string_sprintf("local%s", called_as);
5064 set_process_info("accepting a local non-SMTP message from <%s>",
5068 /* Initialize the session_local_queue-only flag (this will be ignored if
5069 mua_wrapper is set) */
5072 session_local_queue_only = queue_only;
5074 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5075 the spool if so configured. On failure, we must not attempt to send an error
5076 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5077 error code is given.) */
5079 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5081 fprintf(stderr, "exim: insufficient disk space\n");
5082 return EXIT_FAILURE;
5085 /* If this is smtp input of any kind, real or batched, handle the start of the
5088 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5089 because a log line has already been written for all its failure exists
5090 (usually "connection refused: <reason>") and writing another one is
5091 unnecessary clutter. */
5097 if (verify_check_host(&hosts_connection_nolog) == OK)
5098 log_write_selector &= ~L_smtp_connection;
5099 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5100 if (!smtp_start_session())
5103 exim_exit(EXIT_SUCCESS);
5107 /* Otherwise, set up the input size limit here. */
5111 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5112 if (expand_string_message != NULL)
5114 if (thismessage_size_limit == -1)
5115 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5116 "message_size_limit: %s", expand_string_message);
5118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5119 "message_size_limit: %s", expand_string_message);
5123 /* Loop for several messages when reading SMTP input. If we fork any child
5124 processes, we don't want to wait for them unless synchronous delivery is
5125 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5126 same as SIG_DFL, despite the fact that documentation often lists the default as
5127 "ignore". This is a confusing area. This is what I know:
5129 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5130 processes that complete simply to go away without ever becoming defunct. You
5131 can't then wait for them - but we don't want to wait for them in the
5132 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5133 happen for all OS (e.g. *BSD is different).
5135 But that's not the end of the story. Some (many? all?) systems have the
5136 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5137 has by default, so it seems that the difference is merely one of default
5138 (compare restarting vs non-restarting signals).
5140 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5141 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5142 of the loop below. Paranoia rules.
5144 February 2003: That's *still* not the end of the story. There are now versions
5145 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5146 process then calls waitpid(), a grumble is written to the system log, because
5147 this is logically inconsistent. In other words, it doesn't like the paranoia.
5148 As a consequenc of this, the waitpid() below is now excluded if we are sure
5149 that SIG_IGN works. */
5151 if (!synchronous_delivery)
5154 struct sigaction act;
5155 act.sa_handler = SIG_IGN;
5156 sigemptyset(&(act.sa_mask));
5157 act.sa_flags = SA_NOCLDWAIT;
5158 sigaction(SIGCHLD, &act, NULL);
5160 signal(SIGCHLD, SIG_IGN);
5164 /* Save the current store pool point, for resetting at the start of
5165 each message, and save the real sender address, if any. */
5167 reset_point = store_get(0);
5168 real_sender_address = sender_address;
5170 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5171 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5176 store_reset(reset_point);
5179 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5180 input and build the recipients list, before calling receive_msg() to read the
5181 message proper. Whatever sender address is given in the SMTP transaction is
5182 often ignored for local senders - we use the actual sender, which is normally
5183 either the underlying user running this process or a -f argument provided by
5184 a trusted caller. It is saved in real_sender_address. The test for whether to
5185 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5190 if ((rc = smtp_setup_msg()) > 0)
5192 if (real_sender_address != NULL &&
5193 !receive_check_set_sender(sender_address))
5195 sender_address = raw_sender = real_sender_address;
5196 sender_address_unrewritten = NULL;
5199 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5200 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5201 the very end. The result of the ACL is ignored (as for other non-SMTP
5202 messages). It is run for its potential side effects. */
5204 if (smtp_batched_input && acl_not_smtp_start != NULL)
5206 uschar *user_msg, *log_msg;
5207 enable_dollar_recipients = TRUE;
5208 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5209 &user_msg, &log_msg);
5210 enable_dollar_recipients = FALSE;
5213 /* Now get the data for the message */
5215 more = receive_msg(extract_recipients);
5216 if (message_id[0] == 0)
5219 smtp_log_no_mail(); /* Log no mail if configured */
5220 exim_exit(EXIT_FAILURE);
5225 smtp_log_no_mail(); /* Log no mail if configured */
5226 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5230 /* In the non-SMTP case, we have all the information from the command
5231 line, but must process it in case it is in the more general RFC822
5232 format, and in any case, to detect syntax errors. Also, it appears that
5233 the use of comma-separated lists as single arguments is common, so we
5234 had better support them. */
5240 int count = argc - recipients_arg;
5241 uschar **list = argv + recipients_arg;
5243 /* These options cannot be changed dynamically for non-SMTP messages */
5245 active_local_sender_retain = local_sender_retain;
5246 active_local_from_check = local_from_check;
5248 /* Save before any rewriting */
5250 raw_sender = string_copy(sender_address);
5252 /* Loop for each argument */
5254 for (i = 0; i < count; i++)
5256 int start, end, domain;
5258 uschar *s = list[i];
5260 /* Loop for each comma-separated address */
5264 BOOL finished = FALSE;
5266 uschar *ss = parse_find_address_end(s, FALSE);
5268 if (*ss == ',') *ss = 0; else finished = TRUE;
5270 /* Check max recipients - if -t was used, these aren't recipients */
5272 if (recipients_max > 0 && ++rcount > recipients_max &&
5273 !extract_recipients)
5275 if (error_handling == ERRORS_STDERR)
5277 fprintf(stderr, "exim: too many recipients\n");
5278 exim_exit(EXIT_FAILURE);
5283 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5284 errors_sender_rc : EXIT_FAILURE;
5289 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5291 if (domain == 0 && !allow_unqualified_recipient)
5294 errmess = US"unqualified recipient address not allowed";
5297 if (recipient == NULL)
5299 if (error_handling == ERRORS_STDERR)
5301 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5302 string_printing(list[i]), errmess);
5303 exim_exit(EXIT_FAILURE);
5309 eblock.text1 = string_printing(list[i]);
5310 eblock.text2 = errmess;
5312 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5313 errors_sender_rc : EXIT_FAILURE;
5317 receive_add_recipient(recipient, -1);
5320 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5324 /* Show the recipients when debugging */
5329 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5330 if (recipients_list != NULL)
5332 debug_printf("Recipients:\n");
5333 for (i = 0; i < recipients_count; i++)
5334 debug_printf(" %s\n", recipients_list[i].address);
5338 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5339 ignored; rejecting here would just add complication, and it can just as
5340 well be done later. Allow $recipients to be visible in the ACL. */
5342 if (acl_not_smtp_start != NULL)
5344 uschar *user_msg, *log_msg;
5345 enable_dollar_recipients = TRUE;
5346 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5347 &user_msg, &log_msg);
5348 enable_dollar_recipients = FALSE;
5351 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5352 will just read the headers for the message, and not write anything onto the
5355 message_ended = END_NOTENDED;
5356 more = receive_msg(extract_recipients);
5358 /* more is always FALSE here (not SMTP message) when reading a message
5359 for real; when reading the headers of a message for filter testing,
5360 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5362 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5363 } /* Non-SMTP message reception */
5365 /* If this is a filter testing run, there are headers in store, but
5366 no message on the spool. Run the filtering code in testing mode, setting
5367 the domain to the qualify domain and the local part to the current user,
5368 unless they have been set by options. The prefix and suffix are left unset
5369 unless specified. The the return path is set to to the sender unless it has
5370 already been set from a return-path header in the message. */
5372 if (filter_test != FTEST_NONE)
5374 deliver_domain = (ftest_domain != NULL)?
5375 ftest_domain : qualify_domain_recipient;
5376 deliver_domain_orig = deliver_domain;
5377 deliver_localpart = (ftest_localpart != NULL)?
5378 ftest_localpart : originator_login;
5379 deliver_localpart_orig = deliver_localpart;
5380 deliver_localpart_prefix = ftest_prefix;
5381 deliver_localpart_suffix = ftest_suffix;
5382 deliver_home = originator_home;
5384 if (return_path == NULL)
5386 printf("Return-path copied from sender\n");
5387 return_path = string_copy(sender_address);
5391 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5393 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5395 receive_add_recipient(
5396 string_sprintf("%s%s%s@%s",
5397 (ftest_prefix == NULL)? US"" : ftest_prefix,
5399 (ftest_suffix == NULL)? US"" : ftest_suffix,
5400 deliver_domain), -1);
5402 printf("Recipient = %s\n", recipients_list[0].address);
5403 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5404 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5406 if (chdir("/")) /* Get away from wherever the user is running this from */
5408 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5409 exim_exit(EXIT_FAILURE);
5412 /* Now we run either a system filter test, or a user filter test, or both.
5413 In the latter case, headers added by the system filter will persist and be
5414 available to the user filter. We need to copy the filter variables
5417 if ((filter_test & FTEST_SYSTEM) != 0)
5419 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5420 exim_exit(EXIT_FAILURE);
5423 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5425 if ((filter_test & FTEST_USER) != 0)
5427 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5428 exim_exit(EXIT_FAILURE);
5431 exim_exit(EXIT_SUCCESS);
5434 /* Else act on the result of message reception. We should not get here unless
5435 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5436 will be TRUE. If it is not, check on the number of messages received in this
5439 if (!session_local_queue_only &&
5440 smtp_accept_queue_per_connection > 0 &&
5441 receive_messagecount > smtp_accept_queue_per_connection)
5443 session_local_queue_only = TRUE;
5444 queue_only_reason = 2;
5447 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5448 and queue_only_load is set, check that the load average is below it. If it is
5449 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5450 default), we put the whole session into queue_only mode. It then remains this
5451 way for any subsequent messages on the same SMTP connection. This is a
5452 deliberate choice; even though the load average may fall, it doesn't seem
5453 right to deliver later messages on the same call when not delivering earlier
5454 ones. However, there are odd cases where this is not wanted, so this can be
5455 changed by setting queue_only_load_latch false. */
5457 local_queue_only = session_local_queue_only;
5458 if (!local_queue_only && queue_only_load >= 0)
5460 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5461 if (local_queue_only)
5463 queue_only_reason = 3;
5464 if (queue_only_load_latch) session_local_queue_only = TRUE;
5468 /* If running as an MUA wrapper, all queueing options and freezing options
5472 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5474 /* Log the queueing here, when it will get a message id attached, but
5475 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5478 if (local_queue_only) switch(queue_only_reason)
5481 log_write(L_delay_delivery,
5482 LOG_MAIN, "no immediate delivery: more than %d messages "
5483 "received in one connection", smtp_accept_queue_per_connection);
5487 log_write(L_delay_delivery,
5488 LOG_MAIN, "no immediate delivery: load average %.2f",
5489 (double)load_average/1000.0);
5493 /* Else do the delivery unless the ACL or local_scan() called for queue only
5494 or froze the message. Always deliver in a separate process. A fork failure is
5495 not a disaster, as the delivery will eventually happen on a subsequent queue
5496 run. The search cache must be tidied before the fork, as the parent will
5497 do it before exiting. The child will trigger a lookup failure and
5498 thereby defer the delivery if it tries to use (for example) a cached ldap
5499 connection that the parent has called unbind on. */
5501 else if (!queue_only_policy && !deliver_freeze)
5506 if ((pid = fork()) == 0)
5509 close_unwanted(); /* Close unwanted file descriptors and TLS */
5510 exim_nullstd(); /* Ensure std{in,out,err} exist */
5512 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5513 mode, deliver_drop_privilege is forced TRUE). */
5515 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5517 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5519 /* Control does not return here. */
5522 /* No need to re-exec */
5524 rc = deliver_message(message_id, FALSE, FALSE);
5526 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5527 EXIT_SUCCESS : EXIT_FAILURE);
5532 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5533 "process: %s", strerror(errno));
5536 /* In the parent, wait if synchronous delivery is required. This will
5537 always be the case in MUA wrapper mode. */
5539 else if (synchronous_delivery)
5542 while (wait(&status) != pid);
5543 if ((status & 0x00ff) != 0)
5544 log_write(0, LOG_MAIN|LOG_PANIC,
5545 "process %d crashed with signal %d while delivering %s",
5546 (int)pid, status & 0x00ff, message_id);
5547 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5551 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5552 automatically reaps children (see comments above the loop), clear away any
5553 finished subprocesses here, in case there are lots of messages coming in
5554 from the same source. */
5556 #ifndef SIG_IGN_WORKS
5557 while (waitpid(-1, NULL, WNOHANG) > 0);
5561 exim_exit(EXIT_SUCCESS); /* Never returns */
5562 return 0; /* To stop compiler warning */