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_DMARC
820 fprintf(f, " Experimental_DMARC");
822 #ifdef EXPERIMENTAL_OCSP
823 fprintf(f, " Experimental_OCSP");
825 #ifdef EXPERIMENTAL_PRDR
826 fprintf(f, " Experimental_PRDR");
830 fprintf(f, "Lookups (built-in):");
831 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
832 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
834 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
837 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
838 fprintf(f, " dbm dbmjz dbmnz");
840 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
841 fprintf(f, " dnsdb");
843 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
844 fprintf(f, " dsearch");
846 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
847 fprintf(f, " ibase");
849 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
850 fprintf(f, " ldap ldapdn ldapm");
852 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
853 fprintf(f, " mysql");
855 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
856 fprintf(f, " nis nis0");
858 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
859 fprintf(f, " nisplus");
861 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
862 fprintf(f, " oracle");
864 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
865 fprintf(f, " passwd");
867 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
868 fprintf(f, " pgsql");
870 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
871 fprintf(f, " sqlite");
873 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
874 fprintf(f, " testdb");
876 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
877 fprintf(f, " whoson");
881 fprintf(f, "Authenticators:");
883 fprintf(f, " cram_md5");
885 #ifdef AUTH_CYRUS_SASL
886 fprintf(f, " cyrus_sasl");
889 fprintf(f, " dovecot");
892 fprintf(f, " gsasl");
894 #ifdef AUTH_HEIMDAL_GSSAPI
895 fprintf(f, " heimdal_gssapi");
897 #ifdef AUTH_PLAINTEXT
898 fprintf(f, " plaintext");
905 fprintf(f, "Routers:");
907 fprintf(f, " accept");
909 #ifdef ROUTER_DNSLOOKUP
910 fprintf(f, " dnslookup");
912 #ifdef ROUTER_IPLITERAL
913 fprintf(f, " ipliteral");
915 #ifdef ROUTER_IPLOOKUP
916 fprintf(f, " iplookup");
918 #ifdef ROUTER_MANUALROUTE
919 fprintf(f, " manualroute");
921 #ifdef ROUTER_QUERYPROGRAM
922 fprintf(f, " queryprogram");
924 #ifdef ROUTER_REDIRECT
925 fprintf(f, " redirect");
929 fprintf(f, "Transports:");
930 #ifdef TRANSPORT_APPENDFILE
931 fprintf(f, " appendfile");
932 #ifdef SUPPORT_MAILDIR
933 fprintf(f, "/maildir");
935 #ifdef SUPPORT_MAILSTORE
936 fprintf(f, "/mailstore");
942 #ifdef TRANSPORT_AUTOREPLY
943 fprintf(f, " autoreply");
945 #ifdef TRANSPORT_LMTP
948 #ifdef TRANSPORT_PIPE
951 #ifdef TRANSPORT_SMTP
956 if (fixed_never_users[0] > 0)
959 fprintf(f, "Fixed never_users: ");
960 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
961 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
962 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
965 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
967 /* Everything else is details which are only worth reporting when debugging.
968 Perhaps the tls_version_report should move into this too. */
973 /* clang defines __GNUC__ (at least, for me) so test for it first */
974 #if defined(__clang__)
975 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
976 #elif defined(__GNUC__)
977 fprintf(f, "Compiler: GCC [%s]\n",
981 "? unknown version ?"
985 fprintf(f, "Compiler: <unknown>\n");
989 tls_version_report(f);
992 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
993 if (authi->version_report) {
994 (*authi->version_report)(f);
998 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
999 characters; unless it's an ancient version of PCRE in which case it
1001 #ifndef PCRE_PRERELEASE
1002 #define PCRE_PRERELEASE
1005 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1006 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1008 PCRE_MAJOR, PCRE_MINOR,
1009 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1012 #undef EXPAND_AND_QUOTE
1015 for (i = 0; i < lookup_list_count; i++)
1017 if (lookup_list[i]->version_report)
1018 lookup_list[i]->version_report(f);
1021 #ifdef WHITELIST_D_MACROS
1022 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1024 fprintf(f, "WHITELIST_D_MACROS unset\n");
1026 #ifdef TRUSTED_CONFIG_LIST
1027 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1029 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1036 /*************************************************
1037 * Show auxiliary information about Exim *
1038 *************************************************/
1041 show_exim_information(enum commandline_info request, FILE *stream)
1048 fprintf(stream, "Oops, something went wrong.\n");
1052 "The -bI: flag takes a string indicating which information to provide.\n"
1053 "If the string is not recognised, you'll get this help (on stderr).\n"
1055 " exim -bI:help this information\n"
1056 " exim -bI:dscp dscp value keywords known\n"
1057 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1061 for (pp = exim_sieve_extension_list; *pp; ++pp)
1062 fprintf(stream, "%s\n", *pp);
1065 dscp_list_to_stream(stream);
1071 /*************************************************
1072 * Quote a local part *
1073 *************************************************/
1075 /* This function is used when a sender address or a From: or Sender: header
1076 line is being created from the caller's login, or from an authenticated_id. It
1077 applies appropriate quoting rules for a local part.
1079 Argument: the local part
1080 Returns: the local part, quoted if necessary
1084 local_part_quote(uschar *lpart)
1086 BOOL needs_quote = FALSE;
1091 for (t = lpart; !needs_quote && *t != 0; t++)
1093 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1094 (*t != '.' || t == lpart || t[1] == 0);
1097 if (!needs_quote) return lpart;
1100 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1104 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1107 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1110 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1111 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1112 yield = string_cat(yield, &size, &ptr, nq, 1);
1116 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1124 /*************************************************
1125 * Load readline() functions *
1126 *************************************************/
1128 /* This function is called from testing executions that read data from stdin,
1129 but only when running as the calling user. Currently, only -be does this. The
1130 function loads the readline() function library and passes back the functions.
1131 On some systems, it needs the curses library, so load that too, but try without
1132 it if loading fails. All this functionality has to be requested at build time.
1135 fn_readline_ptr pointer to where to put the readline pointer
1136 fn_addhist_ptr pointer to where to put the addhistory function
1138 Returns: the dlopen handle or NULL on failure
1142 set_readline(char * (**fn_readline_ptr)(const char *),
1143 void (**fn_addhist_ptr)(const char *))
1146 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1148 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1149 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1151 if (dlhandle != NULL)
1153 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1154 * char * readline (const char *prompt);
1155 * void add_history (const char *string);
1157 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1158 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1162 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1171 /*************************************************
1172 * Get a line from stdin for testing things *
1173 *************************************************/
1175 /* This function is called when running tests that can take a number of lines
1176 of input (for example, -be and -bt). It handles continuations and trailing
1177 spaces. And prompting and a blank line output on eof. If readline() is in use,
1178 the arguments are non-NULL and provide the relevant functions.
1181 fn_readline readline function or NULL
1182 fn_addhist addhist function or NULL
1184 Returns: pointer to dynamic memory, or NULL at end of file
1188 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1193 uschar *yield = NULL;
1195 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1199 uschar buffer[1024];
1203 char *readline_line = NULL;
1204 if (fn_readline != NULL)
1206 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1207 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1208 p = US readline_line;
1213 /* readline() not in use */
1216 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1220 /* Handle the line */
1222 ss = p + (int)Ustrlen(p);
1223 while (ss > p && isspace(ss[-1])) ss--;
1227 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1230 yield = string_cat(yield, &size, &ptr, p, ss - p);
1233 if (fn_readline != NULL) free(readline_line);
1236 if (ss == p || yield[ptr-1] != '\\')
1244 if (yield == NULL) printf("\n");
1250 /*************************************************
1251 * Output usage information for the program *
1252 *************************************************/
1254 /* This function is called when there are no recipients
1255 or a specific --help argument was added.
1258 progname information on what name we were called by
1260 Returns: DOES NOT RETURN
1264 exim_usage(uschar *progname)
1267 /* Handle specific program invocation varients */
1268 if (Ustrcmp(progname, US"-mailq") == 0)
1271 "mailq - list the contents of the mail queue\n\n"
1272 "For a list of options, see the Exim documentation.\n");
1276 /* Generic usage - we output this whatever happens */
1278 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1279 "not directly from a shell command line. Options and/or arguments control\n"
1280 "what it does when called. For a list of options, see the Exim documentation.\n");
1287 /*************************************************
1288 * Validate that the macros given are okay *
1289 *************************************************/
1291 /* Typically, Exim will drop privileges if macros are supplied. In some
1292 cases, we want to not do so.
1294 Arguments: none (macros is a global)
1295 Returns: true if trusted, false otherwise
1299 macros_trusted(void)
1301 #ifdef WHITELIST_D_MACROS
1303 uschar *whitelisted, *end, *p, **whites, **w;
1304 int white_count, i, n;
1306 BOOL prev_char_item, found;
1311 #ifndef WHITELIST_D_MACROS
1315 /* We only trust -D overrides for some invoking users:
1316 root, the exim run-time user, the optional config owner user.
1317 I don't know why config-owner would be needed, but since they can own the
1318 config files anyway, there's no security risk to letting them override -D. */
1319 if ( ! ((real_uid == root_uid)
1320 || (real_uid == exim_uid)
1321 #ifdef CONFIGURE_OWNER
1322 || (real_uid == config_uid)
1326 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1330 /* Get a list of macros which are whitelisted */
1331 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1332 prev_char_item = FALSE;
1334 for (p = whitelisted; *p != '\0'; ++p)
1336 if (*p == ':' || isspace(*p))
1341 prev_char_item = FALSE;
1344 if (!prev_char_item)
1345 prev_char_item = TRUE;
1352 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1353 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1358 if (i == white_count)
1360 while (*p != '\0' && p < end)
1366 /* The list of macros should be very short. Accept the N*M complexity. */
1367 for (m = macros; m != NULL; m = m->next)
1370 for (w = whites; *w; ++w)
1371 if (Ustrcmp(*w, m->name) == 0)
1378 if (m->replacement == NULL)
1380 len = Ustrlen(m->replacement);
1383 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1384 0, PCRE_EOPT, NULL, 0);
1387 if (n != PCRE_ERROR_NOMATCH)
1388 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1392 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1398 /*************************************************
1399 * Entry point and high-level code *
1400 *************************************************/
1402 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1403 the appropriate action. All the necessary functions are present in the one
1404 binary. I originally thought one should split it up, but it turns out that so
1405 much of the apparatus is needed in each chunk that one might as well just have
1406 it all available all the time, which then makes the coding easier as well.
1409 argc count of entries in argv
1410 argv argument strings, with argv[0] being the program name
1412 Returns: EXIT_SUCCESS if terminated successfully
1413 EXIT_FAILURE otherwise, except when a message has been sent
1414 to the sender, and -oee was given
1418 main(int argc, char **cargv)
1420 uschar **argv = USS cargv;
1421 int arg_receive_timeout = -1;
1422 int arg_smtp_receive_timeout = -1;
1423 int arg_error_handling = error_handling;
1424 int filter_sfd = -1;
1425 int filter_ufd = -1;
1428 int list_queue_option = 0;
1430 int msg_action_arg = -1;
1431 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1432 int queue_only_reason = 0;
1434 int perl_start_option = 0;
1436 int recipients_arg = argc;
1437 int sender_address_domain = 0;
1438 int test_retry_arg = -1;
1439 int test_rewrite_arg = -1;
1440 BOOL arg_queue_only = FALSE;
1441 BOOL bi_option = FALSE;
1442 BOOL checking = FALSE;
1443 BOOL count_queue = FALSE;
1444 BOOL expansion_test = FALSE;
1445 BOOL extract_recipients = FALSE;
1446 BOOL flag_G = FALSE;
1447 BOOL flag_n = FALSE;
1448 BOOL forced_delivery = FALSE;
1449 BOOL f_end_dot = FALSE;
1450 BOOL deliver_give_up = FALSE;
1451 BOOL list_queue = FALSE;
1452 BOOL list_options = FALSE;
1453 BOOL local_queue_only;
1455 BOOL one_msg_action = FALSE;
1456 BOOL queue_only_set = FALSE;
1457 BOOL receiving_message = TRUE;
1458 BOOL sender_ident_set = FALSE;
1459 BOOL session_local_queue_only;
1461 BOOL removed_privilege = FALSE;
1462 BOOL usage_wanted = FALSE;
1463 BOOL verify_address_mode = FALSE;
1464 BOOL verify_as_sender = FALSE;
1465 BOOL version_printed = FALSE;
1466 uschar *alias_arg = NULL;
1467 uschar *called_as = US"";
1468 uschar *cmdline_syslog_name = NULL;
1469 uschar *start_queue_run_id = NULL;
1470 uschar *stop_queue_run_id = NULL;
1471 uschar *expansion_test_message = NULL;
1472 uschar *ftest_domain = NULL;
1473 uschar *ftest_localpart = NULL;
1474 uschar *ftest_prefix = NULL;
1475 uschar *ftest_suffix = NULL;
1476 uschar *malware_test_file = NULL;
1477 uschar *real_sender_address;
1478 uschar *originator_home = US"/";
1483 struct stat statbuf;
1484 pid_t passed_qr_pid = (pid_t)0;
1485 int passed_qr_pipe = -1;
1486 gid_t group_list[NGROUPS_MAX];
1488 /* For the -bI: flag */
1489 enum commandline_info info_flag = CMDINFO_NONE;
1490 BOOL info_stdout = FALSE;
1492 /* Possible options for -R and -S */
1494 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1496 /* Need to define this in case we need to change the environment in order
1497 to get rid of a bogus time zone. We have to make it char rather than uschar
1498 because some OS define it in /usr/include/unistd.h. */
1500 extern char **environ;
1502 /* If the Exim user and/or group and/or the configuration file owner/group were
1503 defined by ref:name at build time, we must now find the actual uid/gid values.
1504 This is a feature to make the lives of binary distributors easier. */
1506 #ifdef EXIM_USERNAME
1507 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1511 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1515 /* If ref:name uses a number as the name, route_finduser() returns
1516 TRUE with exim_uid set and pw coerced to NULL. */
1518 exim_gid = pw->pw_gid;
1519 #ifndef EXIM_GROUPNAME
1523 "exim: ref:name should specify a usercode, not a group.\n"
1524 "exim: can't let you get away with it unless you also specify a group.\n");
1531 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1537 #ifdef EXIM_GROUPNAME
1538 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1540 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1546 #ifdef CONFIGURE_OWNERNAME
1547 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1549 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1550 CONFIGURE_OWNERNAME);
1555 /* We default the system_filter_user to be the Exim run-time user, as a
1556 sane non-root value. */
1557 system_filter_uid = exim_uid;
1559 #ifdef CONFIGURE_GROUPNAME
1560 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1562 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1563 CONFIGURE_GROUPNAME);
1568 /* In the Cygwin environment, some initialization needs doing. It is fudged
1569 in by means of this macro. */
1575 /* Check a field which is patched when we are running Exim within its
1576 testing harness; do a fast initial check, and then the whole thing. */
1578 running_in_test_harness =
1579 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1581 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1582 at the start of a program; however, it seems that some environments do not
1583 follow this. A "strange" locale can affect the formatting of timestamps, so we
1586 setlocale(LC_ALL, "C");
1588 /* Set up the default handler for timing using alarm(). */
1590 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1592 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1593 because store_malloc writes a log entry on failure. */
1595 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1596 if (log_buffer == NULL)
1598 fprintf(stderr, "exim: failed to get store for log buffer\n");
1602 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1603 NULL when the daemon is run and the file is closed. We have to use this
1604 indirection, because some systems don't allow writing to the variable "stderr".
1607 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1609 /* Arrange for the PCRE regex library to use our store functions. Note that
1610 the normal calls are actually macros that add additional arguments for
1611 debugging purposes so we have to assign specially constructed functions here.
1612 The default is to use store in the stacking pool, but this is overridden in the
1613 regex_must_compile() function. */
1615 pcre_malloc = function_store_get;
1616 pcre_free = function_dummy_free;
1618 /* Ensure there is a big buffer for temporary use in several places. It is put
1619 in malloc store so that it can be freed for enlargement if necessary. */
1621 big_buffer = store_malloc(big_buffer_size);
1623 /* Set up the handler for the data request signal, and set the initial
1624 descriptive text. */
1626 set_process_info("initializing");
1627 os_restarting_signal(SIGUSR1, usr1_handler);
1629 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1630 in the daemon code. For the rest of Exim's uses, we ignore it. */
1632 signal(SIGHUP, SIG_IGN);
1634 /* We don't want to die on pipe errors as the code is written to handle
1635 the write error instead. */
1637 signal(SIGPIPE, SIG_IGN);
1639 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1640 set to SIG_IGN. This causes subprocesses that complete before the parent
1641 process waits for them not to hang around, so when Exim calls wait(), nothing
1642 is there. The wait() code has been made robust against this, but let's ensure
1643 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1644 ending status. We use sigaction rather than plain signal() on those OS where
1645 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1646 problem on AIX with this.) */
1650 struct sigaction act;
1651 act.sa_handler = SIG_DFL;
1652 sigemptyset(&(act.sa_mask));
1654 sigaction(SIGCHLD, &act, NULL);
1657 signal(SIGCHLD, SIG_DFL);
1660 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1665 /* Set up the version number. Set up the leading 'E' for the external form of
1666 message ids, set the pointer to the internal form, and initialize it to
1667 indicate no message being processed. */
1670 message_id_option[0] = '-';
1671 message_id_external = message_id_option + 1;
1672 message_id_external[0] = 'E';
1673 message_id = message_id_external + 1;
1676 /* Set the umask to zero so that any files Exim creates using open() are
1677 created with the modes that it specifies. NOTE: Files created with fopen() have
1678 a problem, which was not recognized till rather late (February 2006). With this
1679 umask, such files will be world writeable. (They are all content scanning files
1680 in the spool directory, which isn't world-accessible, so this is not a
1681 disaster, but it's untidy.) I don't want to change this overall setting,
1682 however, because it will interact badly with the open() calls. Instead, there's
1683 now a function called modefopen() that fiddles with the umask while calling
1688 /* Precompile the regular expression for matching a message id. Keep this in
1689 step with the code that generates ids in the accept.c module. We need to do
1690 this here, because the -M options check their arguments for syntactic validity
1691 using mac_ismsgid, which uses this. */
1694 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1696 /* Precompile the regular expression that is used for matching an SMTP error
1697 code, possibly extended, at the start of an error message. Note that the
1698 terminating whitespace character is included. */
1701 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1704 #ifdef WHITELIST_D_MACROS
1705 /* Precompile the regular expression used to filter the content of macros
1706 given to -D for permissibility. */
1708 regex_whitelisted_macro =
1709 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1713 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1714 this seems to be a generally accepted convention, since one finds symbolic
1715 links called "mailq" in standard OS configurations. */
1717 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1718 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1721 receiving_message = FALSE;
1722 called_as = US"-mailq";
1725 /* If the program is called as "rmail" treat it as equivalent to
1726 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1727 i.e. preventing a single dot on a line from terminating the message, and
1728 returning with zero return code, even in cases of error (provided an error
1729 message has been sent). */
1731 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1732 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1735 called_as = US"-rmail";
1736 errors_sender_rc = EXIT_SUCCESS;
1739 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1740 this is a smail convention. */
1742 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1743 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1745 smtp_input = smtp_batched_input = TRUE;
1746 called_as = US"-rsmtp";
1749 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1750 this is a smail convention. */
1752 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1753 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1756 receiving_message = FALSE;
1757 called_as = US"-runq";
1760 /* If the program is called as "newaliases" treat it as equivalent to
1761 "exim -bi"; this is a sendmail convention. */
1763 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1764 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1767 receiving_message = FALSE;
1768 called_as = US"-newaliases";
1771 /* Save the original effective uid for a couple of uses later. It should
1772 normally be root, but in some esoteric environments it may not be. */
1774 original_euid = geteuid();
1776 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1777 to be the same as the real ones. This makes a difference only if Exim is setuid
1778 (or setgid) to something other than root, which could be the case in some
1779 special configurations. */
1781 real_uid = getuid();
1782 real_gid = getgid();
1784 if (real_uid == root_uid)
1786 rv = setgid(real_gid);
1789 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1790 (long int)real_gid, strerror(errno));
1793 rv = setuid(real_uid);
1796 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1797 (long int)real_uid, strerror(errno));
1802 /* If neither the original real uid nor the original euid was root, Exim is
1803 running in an unprivileged state. */
1805 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1807 /* Scan the program's arguments. Some can be dealt with right away; others are
1808 simply recorded for checking and handling afterwards. Do a high-level switch
1809 on the second character (the one after '-'), to save some effort. */
1811 for (i = 1; i < argc; i++)
1813 BOOL badarg = FALSE;
1814 uschar *arg = argv[i];
1818 /* An argument not starting with '-' is the start of a recipients list;
1819 break out of the options-scanning loop. */
1827 /* An option consistion of -- terminates the options */
1829 if (Ustrcmp(arg, "--") == 0)
1831 recipients_arg = i + 1;
1835 /* Handle flagged options */
1837 switchchar = arg[1];
1840 /* Make all -ex options synonymous with -oex arguments, since that
1841 is assumed by various callers. Also make -qR options synonymous with -R
1842 options, as that seems to be required as well. Allow for -qqR too, and
1843 the same for -S options. */
1845 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1846 Ustrncmp(arg+1, "qR", 2) == 0 ||
1847 Ustrncmp(arg+1, "qS", 2) == 0)
1849 switchchar = arg[2];
1852 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1854 switchchar = arg[3];
1856 queue_2stage = TRUE;
1859 /* Make -r synonymous with -f, since it is a documented alias */
1861 else if (arg[1] == 'r') switchchar = 'f';
1863 /* Make -ov synonymous with -v */
1865 else if (Ustrcmp(arg, "-ov") == 0)
1871 /* deal with --option_aliases */
1872 else if (switchchar == '-')
1874 if (Ustrcmp(argrest, "help") == 0)
1876 usage_wanted = TRUE;
1879 else if (Ustrcmp(argrest, "version") == 0)
1886 /* High-level switch on active initial letter */
1891 /* sendmail uses -Ac and -Am to control which .cf file is used;
1894 if (*argrest == '\0') { badarg = TRUE; break; }
1897 BOOL ignore = FALSE;
1902 if (*(argrest + 1) == '\0')
1906 if (!ignore) { badarg = TRUE; break; }
1910 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1911 so has no need of it. */
1914 if (*argrest == 0) i++; /* Skip over the type */
1919 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1921 /* -bd: Run in daemon mode, awaiting SMTP connections.
1922 -bdf: Ditto, but in the foreground.
1925 if (*argrest == 'd')
1927 daemon_listen = TRUE;
1928 if (*(++argrest) == 'f') background_daemon = FALSE;
1929 else if (*argrest != 0) { badarg = TRUE; break; }
1932 /* -be: Run in expansion test mode
1933 -bem: Ditto, but read a message from a file first
1936 else if (*argrest == 'e')
1938 expansion_test = checking = TRUE;
1939 if (argrest[1] == 'm')
1941 if (++i >= argc) { badarg = TRUE; break; }
1942 expansion_test_message = argv[i];
1945 if (argrest[1] != 0) { badarg = TRUE; break; }
1948 /* -bF: Run system filter test */
1950 else if (*argrest == 'F')
1952 filter_test |= FTEST_SYSTEM;
1953 if (*(++argrest) != 0) { badarg = TRUE; break; }
1954 if (++i < argc) filter_test_sfile = argv[i]; else
1956 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1961 /* -bf: Run user filter test
1962 -bfd: Set domain for filter testing
1963 -bfl: Set local part for filter testing
1964 -bfp: Set prefix for filter testing
1965 -bfs: Set suffix for filter testing
1968 else if (*argrest == 'f')
1970 if (*(++argrest) == 0)
1972 filter_test |= FTEST_USER;
1973 if (++i < argc) filter_test_ufile = argv[i]; else
1975 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1983 fprintf(stderr, "exim: string expected after %s\n", arg);
1986 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1987 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1988 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1989 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1990 else { badarg = TRUE; break; }
1994 /* -bh: Host checking - an IP address must follow. */
1996 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1998 if (++i >= argc) { badarg = TRUE; break; }
1999 sender_host_address = argv[i];
2000 host_checking = checking = log_testing_mode = TRUE;
2001 host_checking_callout = argrest[1] == 'c';
2004 /* -bi: This option is used by sendmail to initialize *the* alias file,
2005 though it has the -oA option to specify a different file. Exim has no
2006 concept of *the* alias file, but since Sun's YP make script calls
2007 sendmail this way, some support must be provided. */
2009 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2011 /* -bI: provide information, of the type to follow after a colon.
2012 This is an Exim flag. */
2014 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2016 uschar *p = &argrest[2];
2017 info_flag = CMDINFO_HELP;
2020 if (strcmpic(p, CUS"sieve") == 0)
2022 info_flag = CMDINFO_SIEVE;
2025 else if (strcmpic(p, CUS"dscp") == 0)
2027 info_flag = CMDINFO_DSCP;
2030 else if (strcmpic(p, CUS"help") == 0)
2037 /* -bm: Accept and deliver message - the default option. Reinstate
2038 receiving_message, which got turned off for all -b options. */
2040 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2042 /* -bmalware: test the filename given for malware */
2044 else if (Ustrcmp(argrest, "malware") == 0)
2046 if (++i >= argc) { badarg = TRUE; break; }
2047 malware_test_file = argv[i];
2050 /* -bnq: For locally originating messages, do not qualify unqualified
2051 addresses. In the envelope, this causes errors; in header lines they
2054 else if (Ustrcmp(argrest, "nq") == 0)
2056 allow_unqualified_sender = FALSE;
2057 allow_unqualified_recipient = FALSE;
2060 /* -bpxx: List the contents of the mail queue, in various forms. If
2061 the option is -bpc, just a queue count is needed. Otherwise, if the
2062 first letter after p is r, then order is random. */
2064 else if (*argrest == 'p')
2066 if (*(++argrest) == 'c')
2069 if (*(++argrest) != 0) badarg = TRUE;
2073 if (*argrest == 'r')
2075 list_queue_option = 8;
2078 else list_queue_option = 0;
2082 /* -bp: List the contents of the mail queue, top-level only */
2084 if (*argrest == 0) {}
2086 /* -bpu: List the contents of the mail queue, top-level undelivered */
2088 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2090 /* -bpa: List the contents of the mail queue, including all delivered */
2092 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2094 /* Unknown after -bp[r] */
2104 /* -bP: List the configuration variables given as the address list.
2105 Force -v, so configuration errors get displayed. */
2107 else if (Ustrcmp(argrest, "P") == 0)
2109 list_options = TRUE;
2110 debug_selector |= D_v;
2111 debug_file = stderr;
2114 /* -brt: Test retry configuration lookup */
2116 else if (Ustrcmp(argrest, "rt") == 0)
2118 test_retry_arg = i + 1;
2122 /* -brw: Test rewrite configuration */
2124 else if (Ustrcmp(argrest, "rw") == 0)
2126 test_rewrite_arg = i + 1;
2130 /* -bS: Read SMTP commands on standard input, but produce no replies -
2131 all errors are reported by sending messages. */
2133 else if (Ustrcmp(argrest, "S") == 0)
2134 smtp_input = smtp_batched_input = receiving_message = TRUE;
2136 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2137 on standard output. */
2139 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2141 /* -bt: address testing mode */
2143 else if (Ustrcmp(argrest, "t") == 0)
2144 address_test_mode = checking = log_testing_mode = TRUE;
2146 /* -bv: verify addresses */
2148 else if (Ustrcmp(argrest, "v") == 0)
2149 verify_address_mode = checking = log_testing_mode = TRUE;
2151 /* -bvs: verify sender addresses */
2153 else if (Ustrcmp(argrest, "vs") == 0)
2155 verify_address_mode = checking = log_testing_mode = TRUE;
2156 verify_as_sender = TRUE;
2159 /* -bV: Print version string and support details */
2161 else if (Ustrcmp(argrest, "V") == 0)
2163 printf("Exim version %s #%s built %s\n", version_string,
2164 version_cnumber, version_date);
2165 printf("%s\n", CS version_copyright);
2166 version_printed = TRUE;
2167 show_whats_supported(stdout);
2170 /* -bw: inetd wait mode, accept a listening socket as stdin */
2172 else if (*argrest == 'w')
2174 inetd_wait_mode = TRUE;
2175 background_daemon = FALSE;
2176 daemon_listen = TRUE;
2177 if (*(++argrest) != '\0')
2179 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2180 if (inetd_wait_timeout <= 0)
2182 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2192 /* -C: change configuration file list; ignore if it isn't really
2193 a change! Enforce a prefix check if required. */
2198 if(++i < argc) argrest = argv[i]; else
2199 { badarg = TRUE; break; }
2201 if (Ustrcmp(config_main_filelist, argrest) != 0)
2203 #ifdef ALT_CONFIG_PREFIX
2205 int len = Ustrlen(ALT_CONFIG_PREFIX);
2206 uschar *list = argrest;
2208 while((filename = string_nextinlist(&list, &sep, big_buffer,
2209 big_buffer_size)) != NULL)
2211 if ((Ustrlen(filename) < len ||
2212 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2213 Ustrstr(filename, "/../") != NULL) &&
2214 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2216 fprintf(stderr, "-C Permission denied\n");
2221 if (real_uid != root_uid)
2223 #ifdef TRUSTED_CONFIG_LIST
2225 if (real_uid != exim_uid
2226 #ifdef CONFIGURE_OWNER
2227 && real_uid != config_uid
2230 trusted_config = FALSE;
2233 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2236 struct stat statbuf;
2238 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2239 (statbuf.st_uid != root_uid /* owner not root */
2240 #ifdef CONFIGURE_OWNER
2241 && statbuf.st_uid != config_uid /* owner not the special one */
2244 (statbuf.st_gid != root_gid /* group not root */
2245 #ifdef CONFIGURE_GROUP
2246 && statbuf.st_gid != config_gid /* group not the special one */
2248 && (statbuf.st_mode & 020) != 0 /* group writeable */
2250 (statbuf.st_mode & 2) != 0) /* world writeable */
2252 trusted_config = FALSE;
2257 /* Well, the trust list at least is up to scratch... */
2258 void *reset_point = store_get(0);
2259 uschar *trusted_configs[32];
2263 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2265 uschar *start = big_buffer, *nl;
2266 while (*start && isspace(*start))
2270 nl = Ustrchr(start, '\n');
2273 trusted_configs[nr_configs++] = string_copy(start);
2274 if (nr_configs == 32)
2282 uschar *list = argrest;
2284 while (trusted_config && (filename = string_nextinlist(&list,
2285 &sep, big_buffer, big_buffer_size)) != NULL)
2287 for (i=0; i < nr_configs; i++)
2289 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2292 if (i == nr_configs)
2294 trusted_config = FALSE;
2298 store_reset(reset_point);
2302 /* No valid prefixes found in trust_list file. */
2303 trusted_config = FALSE;
2309 /* Could not open trust_list file. */
2310 trusted_config = FALSE;
2314 /* Not root; don't trust config */
2315 trusted_config = FALSE;
2319 config_main_filelist = argrest;
2320 config_changed = TRUE;
2325 /* -D: set up a macro definition */
2328 #ifdef DISABLE_D_OPTION
2329 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2334 macro_item *mlast = NULL;
2337 uschar *s = argrest;
2339 while (isspace(*s)) s++;
2341 if (*s < 'A' || *s > 'Z')
2343 fprintf(stderr, "exim: macro name set by -D must start with "
2344 "an upper case letter\n");
2348 while (isalnum(*s) || *s == '_')
2350 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2354 if (ptr == 0) { badarg = TRUE; break; }
2355 while (isspace(*s)) s++;
2358 if (*s++ != '=') { badarg = TRUE; break; }
2359 while (isspace(*s)) s++;
2362 for (m = macros; m != NULL; m = m->next)
2364 if (Ustrcmp(m->name, name) == 0)
2366 fprintf(stderr, "exim: duplicated -D in command line\n");
2372 m = store_get(sizeof(macro_item) + Ustrlen(name));
2374 m->command_line = TRUE;
2375 if (mlast == NULL) macros = m; else mlast->next = m;
2376 Ustrcpy(m->name, name);
2377 m->replacement = string_copy(s);
2379 if (clmacro_count >= MAX_CLMACROS)
2381 fprintf(stderr, "exim: too many -D options on command line\n");
2384 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2390 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2391 The latter is now a no-op, retained for compatibility only. If -dd is used,
2392 debugging subprocesses of the daemon is disabled. */
2395 if (Ustrcmp(argrest, "ropcr") == 0)
2397 /* drop_cr = TRUE; */
2400 /* Use an intermediate variable so that we don't set debugging while
2401 decoding the debugging bits. */
2405 unsigned int selector = D_default;
2408 if (*argrest == 'd')
2410 debug_daemon = TRUE;
2414 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2415 debug_options_count, US"debug", 0);
2416 debug_selector = selector;
2421 /* -E: This is a local error message. This option is not intended for
2422 external use at all, but is not restricted to trusted callers because it
2423 does no harm (just suppresses certain error messages) and if Exim is run
2424 not setuid root it won't always be trusted when it generates error
2425 messages using this option. If there is a message id following -E, point
2426 message_reference at it, for logging. */
2429 local_error_message = TRUE;
2430 if (mac_ismsgid(argrest)) message_reference = argrest;
2434 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2435 option, so it looks as if historically the -oex options are also callable
2436 without the leading -o. So we have to accept them. Before the switch,
2437 anything starting -oe has been converted to -e. Exim does not support all
2438 of the sendmail error options. */
2441 if (Ustrcmp(argrest, "e") == 0)
2443 arg_error_handling = ERRORS_SENDER;
2444 errors_sender_rc = EXIT_SUCCESS;
2446 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2447 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2448 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2449 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2454 /* -F: Set sender's full name, used instead of the gecos entry from
2455 the password file. Since users can usually alter their gecos entries,
2456 there's no security involved in using this instead. The data can follow
2457 the -F or be in the next argument. */
2462 if(++i < argc) argrest = argv[i]; else
2463 { badarg = TRUE; break; }
2465 originator_name = argrest;
2466 sender_name_forced = TRUE;
2470 /* -f: Set sender's address - this value is only actually used if Exim is
2471 run by a trusted user, or if untrusted_set_sender is set and matches the
2472 address, except that the null address can always be set by any user. The
2473 test for this happens later, when the value given here is ignored when not
2474 permitted. For an untrusted user, the actual sender is still put in Sender:
2475 if it doesn't match the From: header (unless no_local_from_check is set).
2476 The data can follow the -f or be in the next argument. The -r switch is an
2477 obsolete form of -f but since there appear to be programs out there that
2478 use anything that sendmail has ever supported, better accept it - the
2479 synonymizing is done before the switch above.
2481 At this stage, we must allow domain literal addresses, because we don't
2482 know what the setting of allow_domain_literals is yet. Ditto for trailing
2483 dots and strip_trailing_dot. */
2491 if (i+1 < argc) argrest = argv[++i]; else
2492 { badarg = TRUE; break; }
2496 sender_address = string_sprintf(""); /* Ensure writeable memory */
2500 uschar *temp = argrest + Ustrlen(argrest) - 1;
2501 while (temp >= argrest && isspace(*temp)) temp--;
2502 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2503 allow_domain_literals = TRUE;
2504 strip_trailing_dot = TRUE;
2505 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2506 &sender_address_domain, TRUE);
2507 allow_domain_literals = FALSE;
2508 strip_trailing_dot = FALSE;
2509 if (sender_address == NULL)
2511 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2512 return EXIT_FAILURE;
2515 sender_address_forced = TRUE;
2519 /* -G: sendmail invocation to specify that it's a gateway submission and
2520 sendmail may complain about problems instead of fixing them.
2521 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2522 not at this time complain about problems. */
2528 /* -h: Set the hop count for an incoming message. Exim does not currently
2529 support this; it always computes it by counting the Received: headers.
2530 To put it in will require a change to the spool header file format. */
2535 if(++i < argc) argrest = argv[i]; else
2536 { badarg = TRUE; break; }
2538 if (!isdigit(*argrest)) badarg = TRUE;
2542 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2543 not to be documented for sendmail but mailx (at least) uses it) */
2546 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2550 /* -L: set the identifier used for syslog; equivalent to setting
2551 syslog_processname in the config file, but needs to be an admin option. */
2554 if (*argrest == '\0')
2556 if(++i < argc) argrest = argv[i]; else
2557 { badarg = TRUE; break; }
2559 sz = Ustrlen(argrest);
2562 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2563 return EXIT_FAILURE;
2567 fprintf(stderr, "exim: the -L syslog name is too short\n");
2568 return EXIT_FAILURE;
2570 cmdline_syslog_name = argrest;
2574 receiving_message = FALSE;
2576 /* -MC: continue delivery of another message via an existing open
2577 file descriptor. This option is used for an internal call by the
2578 smtp transport when there is a pending message waiting to go to an
2579 address to which it has got a connection. Five subsequent arguments are
2580 required: transport name, host name, IP address, sequence number, and
2581 message_id. Transports may decline to create new processes if the sequence
2582 number gets too big. The channel is stdin. This (-MC) must be the last
2583 argument. There's a subsequent check that the real-uid is privileged.
2585 If we are running in the test harness. delay for a bit, to let the process
2586 that set this one up complete. This makes for repeatability of the logging,
2589 if (Ustrcmp(argrest, "C") == 0)
2591 union sockaddr_46 interface_sock;
2592 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2596 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2597 return EXIT_FAILURE;
2600 if (msg_action_arg >= 0)
2602 fprintf(stderr, "exim: incompatible arguments\n");
2603 return EXIT_FAILURE;
2606 continue_transport = argv[++i];
2607 continue_hostname = argv[++i];
2608 continue_host_address = argv[++i];
2609 continue_sequence = Uatoi(argv[++i]);
2610 msg_action = MSG_DELIVER;
2611 msg_action_arg = ++i;
2612 forced_delivery = TRUE;
2613 queue_run_pid = passed_qr_pid;
2614 queue_run_pipe = passed_qr_pipe;
2616 if (!mac_ismsgid(argv[i]))
2618 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2620 return EXIT_FAILURE;
2623 /* Set up $sending_ip_address and $sending_port */
2625 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2627 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2631 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2633 return EXIT_FAILURE;
2636 if (running_in_test_harness) millisleep(500);
2640 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2641 precedes -MC (see above). The flag indicates that the host to which
2642 Exim is connected has accepted an AUTH sequence. */
2644 else if (Ustrcmp(argrest, "CA") == 0)
2646 smtp_authenticated = TRUE;
2650 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2651 it preceded -MC (see above) */
2653 else if (Ustrcmp(argrest, "CP") == 0)
2655 smtp_use_pipelining = TRUE;
2659 /* -MCQ: pass on the pid of the queue-running process that started
2660 this chain of deliveries and the fd of its synchronizing pipe; this
2661 is useful only when it precedes -MC (see above) */
2663 else if (Ustrcmp(argrest, "CQ") == 0)
2665 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2667 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2672 /* -MCS: set the smtp_use_size flag; this is useful only when it
2673 precedes -MC (see above) */
2675 else if (Ustrcmp(argrest, "CS") == 0)
2677 smtp_use_size = TRUE;
2681 /* -MCT: set the tls_offered flag; this is useful only when it
2682 precedes -MC (see above). The flag indicates that the host to which
2683 Exim is connected has offered TLS support. */
2686 else if (Ustrcmp(argrest, "CT") == 0)
2693 /* -M[x]: various operations on the following list of message ids:
2694 -M deliver the messages, ignoring next retry times and thawing
2695 -Mc deliver the messages, checking next retry times, no thawing
2696 -Mf freeze the messages
2697 -Mg give up on the messages
2698 -Mt thaw the messages
2699 -Mrm remove the messages
2700 In the above cases, this must be the last option. There are also the
2701 following options which are followed by a single message id, and which
2702 act on that message. Some of them use the "recipient" addresses as well.
2703 -Mar add recipient(s)
2704 -Mmad mark all recipients delivered
2705 -Mmd mark recipients(s) delivered
2707 -Mset load a message for use with -be
2709 -Mvc show copy (of whole message, in RFC 2822 format)
2714 else if (*argrest == 0)
2716 msg_action = MSG_DELIVER;
2717 forced_delivery = deliver_force_thaw = TRUE;
2719 else if (Ustrcmp(argrest, "ar") == 0)
2721 msg_action = MSG_ADD_RECIPIENT;
2722 one_msg_action = TRUE;
2724 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2725 else if (Ustrcmp(argrest, "es") == 0)
2727 msg_action = MSG_EDIT_SENDER;
2728 one_msg_action = TRUE;
2730 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2731 else if (Ustrcmp(argrest, "g") == 0)
2733 msg_action = MSG_DELIVER;
2734 deliver_give_up = TRUE;
2736 else if (Ustrcmp(argrest, "mad") == 0)
2738 msg_action = MSG_MARK_ALL_DELIVERED;
2740 else if (Ustrcmp(argrest, "md") == 0)
2742 msg_action = MSG_MARK_DELIVERED;
2743 one_msg_action = TRUE;
2745 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2746 else if (Ustrcmp(argrest, "set") == 0)
2748 msg_action = MSG_LOAD;
2749 one_msg_action = TRUE;
2751 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2752 else if (Ustrcmp(argrest, "vb") == 0)
2754 msg_action = MSG_SHOW_BODY;
2755 one_msg_action = TRUE;
2757 else if (Ustrcmp(argrest, "vc") == 0)
2759 msg_action = MSG_SHOW_COPY;
2760 one_msg_action = TRUE;
2762 else if (Ustrcmp(argrest, "vh") == 0)
2764 msg_action = MSG_SHOW_HEADER;
2765 one_msg_action = TRUE;
2767 else if (Ustrcmp(argrest, "vl") == 0)
2769 msg_action = MSG_SHOW_LOG;
2770 one_msg_action = TRUE;
2772 else { badarg = TRUE; break; }
2774 /* All the -Mxx options require at least one message id. */
2776 msg_action_arg = i + 1;
2777 if (msg_action_arg >= argc)
2779 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2780 return EXIT_FAILURE;
2783 /* Some require only message ids to follow */
2785 if (!one_msg_action)
2788 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2790 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2792 return EXIT_FAILURE;
2794 goto END_ARG; /* Remaining args are ids */
2797 /* Others require only one message id, possibly followed by addresses,
2798 which will be handled as normal arguments. */
2802 if (!mac_ismsgid(argv[msg_action_arg]))
2804 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2805 argv[msg_action_arg], arg);
2806 return EXIT_FAILURE;
2813 /* Some programs seem to call the -om option without the leading o;
2814 for sendmail it askes for "me too". Exim always does this. */
2817 if (*argrest != 0) badarg = TRUE;
2821 /* -N: don't do delivery - a debugging option that stops transports doing
2822 their thing. It implies debugging at the D_v level. */
2827 dont_deliver = TRUE;
2828 debug_selector |= D_v;
2829 debug_file = stderr;
2835 /* -n: This means "don't alias" in sendmail, apparently.
2836 For normal invocations, it has no effect.
2837 It may affect some other options. */
2843 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2844 option to the specified value. This form uses long names. We need to handle
2845 -O option=value and -Ooption=value. */
2852 fprintf(stderr, "exim: string expected after -O\n");
2860 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2863 if (*argrest == 'A')
2865 alias_arg = argrest + 1;
2866 if (alias_arg[0] == 0)
2868 if (i+1 < argc) alias_arg = argv[++i]; else
2870 fprintf(stderr, "exim: string expected after -oA\n");
2876 /* -oB: Set a connection message max value for remote deliveries */
2878 else if (*argrest == 'B')
2880 uschar *p = argrest + 1;
2883 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2885 connection_max_messages = 1;
2894 fprintf(stderr, "exim: number expected after -oB\n");
2897 connection_max_messages = Uatoi(p);
2901 /* -odb: background delivery */
2903 else if (Ustrcmp(argrest, "db") == 0)
2905 synchronous_delivery = FALSE;
2906 arg_queue_only = FALSE;
2907 queue_only_set = TRUE;
2910 /* -odf: foreground delivery (smail-compatible option); same effect as
2911 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2914 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2916 synchronous_delivery = TRUE;
2917 arg_queue_only = FALSE;
2918 queue_only_set = TRUE;
2921 /* -odq: queue only */
2923 else if (Ustrcmp(argrest, "dq") == 0)
2925 synchronous_delivery = FALSE;
2926 arg_queue_only = TRUE;
2927 queue_only_set = TRUE;
2930 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2931 but no remote delivery */
2933 else if (Ustrcmp(argrest, "dqs") == 0)
2936 arg_queue_only = FALSE;
2937 queue_only_set = TRUE;
2940 /* -oex: Sendmail error flags. As these are also accepted without the
2941 leading -o prefix, for compatibility with vacation and other callers,
2942 they are handled with -e above. */
2944 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2945 -oitrue: Another sendmail syntax for the same */
2947 else if (Ustrcmp(argrest, "i") == 0 ||
2948 Ustrcmp(argrest, "itrue") == 0)
2951 /* -oM*: Set various characteristics for an incoming message; actually
2952 acted on for trusted callers only. */
2954 else if (*argrest == 'M')
2958 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2962 /* -oMa: Set sender host address */
2964 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2966 /* -oMaa: Set authenticator name */
2968 else if (Ustrcmp(argrest, "Maa") == 0)
2969 sender_host_authenticated = argv[++i];
2971 /* -oMas: setting authenticated sender */
2973 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2975 /* -oMai: setting authenticated id */
2977 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2979 /* -oMi: Set incoming interface address */
2981 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2983 /* -oMr: Received protocol */
2985 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2987 /* -oMs: Set sender host name */
2989 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2991 /* -oMt: Set sender ident */
2993 else if (Ustrcmp(argrest, "Mt") == 0)
2995 sender_ident_set = TRUE;
2996 sender_ident = argv[++i];
2999 /* Else a bad argument */
3008 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3009 seem to call this as -m (undocumented), so that is also accepted (see
3012 else if (Ustrcmp(argrest, "m") == 0) {}
3014 /* -oo: An ancient flag for old-style addresses which still seems to
3015 crop up in some calls (see in SCO). */
3017 else if (Ustrcmp(argrest, "o") == 0) {}
3019 /* -oP <name>: set pid file path for daemon */
3021 else if (Ustrcmp(argrest, "P") == 0)
3022 override_pid_file_path = argv[++i];
3024 /* -or <n>: set timeout for non-SMTP acceptance
3025 -os <n>: set timeout for SMTP acceptance */
3027 else if (*argrest == 'r' || *argrest == 's')
3029 int *tp = (*argrest == 'r')?
3030 &arg_receive_timeout : &arg_smtp_receive_timeout;
3031 if (argrest[1] == 0)
3033 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3035 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3038 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3043 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3045 else if (Ustrcmp(argrest, "X") == 0)
3046 override_local_interfaces = argv[++i];
3048 /* Unknown -o argument */
3054 /* -ps: force Perl startup; -pd force delayed Perl startup */
3058 if (*argrest == 's' && argrest[1] == 0)
3060 perl_start_option = 1;
3063 if (*argrest == 'd' && argrest[1] == 0)
3065 perl_start_option = -1;
3070 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3071 which sets the host protocol and host name */
3075 if (i+1 < argc) argrest = argv[++i]; else
3076 { badarg = TRUE; break; }
3081 uschar *hn = Ustrchr(argrest, ':');
3084 received_protocol = argrest;
3088 received_protocol = string_copyn(argrest, hn - argrest);
3089 sender_host_name = hn + 1;
3096 receiving_message = FALSE;
3097 if (queue_interval >= 0)
3099 fprintf(stderr, "exim: -q specified more than once\n");
3103 /* -qq...: Do queue runs in a 2-stage manner */
3105 if (*argrest == 'q')
3107 queue_2stage = TRUE;
3111 /* -qi...: Do only first (initial) deliveries */
3113 if (*argrest == 'i')
3115 queue_run_first_delivery = TRUE;
3119 /* -qf...: Run the queue, forcing deliveries
3120 -qff..: Ditto, forcing thawing as well */
3122 if (*argrest == 'f')
3124 queue_run_force = TRUE;
3125 if (*(++argrest) == 'f')
3127 deliver_force_thaw = TRUE;
3132 /* -q[f][f]l...: Run the queue only on local deliveries */
3134 if (*argrest == 'l')
3136 queue_run_local = TRUE;
3140 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3141 optionally starting from a given message id. */
3143 if (*argrest == 0 &&
3144 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3147 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3148 start_queue_run_id = argv[++i];
3149 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3150 stop_queue_run_id = argv[++i];
3153 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3154 optionally local only. */
3159 queue_interval = readconf_readtime(argrest, 0, FALSE);
3161 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3162 if (queue_interval <= 0)
3164 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3171 case 'R': /* Synonymous with -qR... */
3172 receiving_message = FALSE;
3174 /* -Rf: As -R (below) but force all deliveries,
3175 -Rff: Ditto, but also thaw all frozen messages,
3176 -Rr: String is regex
3177 -Rrf: Regex and force
3178 -Rrff: Regex and force and thaw
3180 in all cases provided there are no further characters in this
3186 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3188 if (Ustrcmp(argrest, rsopts[i]) == 0)
3190 if (i != 2) queue_run_force = TRUE;
3191 if (i >= 2) deliver_selectstring_regex = TRUE;
3192 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3193 argrest += Ustrlen(rsopts[i]);
3198 /* -R: Set string to match in addresses for forced queue run to
3199 pick out particular messages. */
3203 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3205 fprintf(stderr, "exim: string expected after -R\n");
3209 else deliver_selectstring = argrest;
3213 /* -r: an obsolete synonym for -f (see above) */
3216 /* -S: Like -R but works on sender. */
3218 case 'S': /* Synonymous with -qS... */
3219 receiving_message = FALSE;
3221 /* -Sf: As -S (below) but force all deliveries,
3222 -Sff: Ditto, but also thaw all frozen messages,
3223 -Sr: String is regex
3224 -Srf: Regex and force
3225 -Srff: Regex and force and thaw
3227 in all cases provided there are no further characters in this
3233 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3235 if (Ustrcmp(argrest, rsopts[i]) == 0)
3237 if (i != 2) queue_run_force = TRUE;
3238 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3239 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3240 argrest += Ustrlen(rsopts[i]);
3245 /* -S: Set string to match in addresses for forced queue run to
3246 pick out particular messages. */
3250 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3252 fprintf(stderr, "exim: string expected after -S\n");
3256 else deliver_selectstring_sender = argrest;
3259 /* -Tqt is an option that is exclusively for use by the testing suite.
3260 It is not recognized in other circumstances. It allows for the setting up
3261 of explicit "queue times" so that various warning/retry things can be
3262 tested. Otherwise variability of clock ticks etc. cause problems. */
3265 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3266 fudged_queue_times = argv[++i];
3271 /* -t: Set flag to extract recipients from body of message. */
3274 if (*argrest == 0) extract_recipients = TRUE;
3276 /* -ti: Set flag to extract recipients from body of message, and also
3277 specify that dot does not end the message. */
3279 else if (Ustrcmp(argrest, "i") == 0)
3281 extract_recipients = TRUE;
3285 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3288 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3295 /* -U: This means "initial user submission" in sendmail, apparently. The
3296 doc claims that in future sendmail may refuse syntactically invalid
3297 messages instead of fixing them. For the moment, we just ignore it. */
3303 /* -v: verify things - this is a very low-level debugging */
3308 debug_selector |= D_v;
3309 debug_file = stderr;
3315 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3317 The -x flag tells the sendmail command that mail from a local
3318 mail program has National Language Support (NLS) extended characters
3319 in the body of the mail item. The sendmail command can send mail with
3320 extended NLS characters across networks that normally corrupts these
3323 As Exim is 8-bit clean, it just ignores this flag. */
3326 if (*argrest != 0) badarg = TRUE;
3329 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3330 logs to that file. We swallow the parameter and otherwise ignore it. */
3333 if (*argrest == '\0')
3337 fprintf(stderr, "exim: string expected after -X\n");
3343 /* All other initial characters are errors */
3348 } /* End of high-level switch statement */
3350 /* Failed to recognize the option, or syntax error */
3354 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3355 "option %s\n", arg);
3361 /* If -R or -S have been specified without -q, assume a single queue run. */
3363 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3364 queue_interval < 0) queue_interval = 0;
3368 /* If usage_wanted is set we call the usage function - which never returns */
3369 if (usage_wanted) exim_usage(called_as);
3371 /* Arguments have been processed. Check for incompatibilities. */
3373 (smtp_input || extract_recipients || recipients_arg < argc) &&
3374 (daemon_listen || queue_interval >= 0 || bi_option ||
3375 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3376 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3379 msg_action_arg > 0 &&
3380 (daemon_listen || queue_interval >= 0 || list_options ||
3381 (checking && msg_action != MSG_LOAD) ||
3382 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3385 (daemon_listen || queue_interval >= 0) &&
3386 (sender_address != NULL || list_options || list_queue || checking ||
3390 daemon_listen && queue_interval == 0
3393 inetd_wait_mode && queue_interval >= 0
3397 (checking || smtp_input || extract_recipients ||
3398 filter_test != FTEST_NONE || bi_option)
3401 verify_address_mode &&
3402 (address_test_mode || smtp_input || extract_recipients ||
3403 filter_test != FTEST_NONE || bi_option)
3406 address_test_mode && (smtp_input || extract_recipients ||
3407 filter_test != FTEST_NONE || bi_option)
3410 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3414 deliver_selectstring != NULL && queue_interval < 0
3417 msg_action == MSG_LOAD &&
3418 (!expansion_test || expansion_test_message != NULL)
3422 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3426 /* If debugging is set up, set the file and the file descriptor to pass on to
3427 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3428 to run in the foreground. */
3430 if (debug_selector != 0)
3432 debug_file = stderr;
3433 debug_fd = fileno(debug_file);
3434 background_daemon = FALSE;
3435 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3436 if (debug_selector != D_v) /* -v only doesn't show this */
3438 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3439 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3441 if (!version_printed)
3442 show_whats_supported(stderr);
3446 /* When started with root privilege, ensure that the limits on the number of
3447 open files and the number of processes (where that is accessible) are
3448 sufficiently large, or are unset, in case Exim has been called from an
3449 environment where the limits are screwed down. Not all OS have the ability to
3450 change some of these limits. */
3454 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3460 #ifdef RLIMIT_NOFILE
3461 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3463 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3465 rlp.rlim_cur = rlp.rlim_max = 0;
3468 /* I originally chose 1000 as a nice big number that was unlikely to
3469 be exceeded. It turns out that some older OS have a fixed upper limit of
3472 if (rlp.rlim_cur < 1000)
3474 rlp.rlim_cur = rlp.rlim_max = 1000;
3475 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3477 rlp.rlim_cur = rlp.rlim_max = 256;
3478 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3479 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3486 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3488 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3490 rlp.rlim_cur = rlp.rlim_max = 0;
3493 #ifdef RLIM_INFINITY
3494 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3496 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3498 if (rlp.rlim_cur < 1000)
3500 rlp.rlim_cur = rlp.rlim_max = 1000;
3502 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3503 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3509 /* Exim is normally entered as root (but some special configurations are
3510 possible that don't do this). However, it always spins off sub-processes that
3511 set their uid and gid as required for local delivery. We don't want to pass on
3512 any extra groups that root may belong to, so we want to get rid of them all at
3515 We need to obey setgroups() at this stage, before possibly giving up root
3516 privilege for a changed configuration file, but later on we might need to
3517 check on the additional groups for the admin user privilege - can't do that
3518 till after reading the config, which might specify the exim gid. Therefore,
3519 save the group list here first. */
3521 group_count = getgroups(NGROUPS_MAX, group_list);
3522 if (group_count < 0)
3524 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3528 /* There is a fundamental difference in some BSD systems in the matter of
3529 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3530 known not to be different. On the "different" systems there is a single group
3531 list, and the first entry in it is the current group. On all other versions of
3532 Unix there is a supplementary group list, which is in *addition* to the current
3533 group. Consequently, to get rid of all extraneous groups on a "standard" system
3534 you pass over 0 groups to setgroups(), while on a "different" system you pass
3535 over a single group - the current group, which is always the first group in the
3536 list. Calling setgroups() with zero groups on a "different" system results in
3537 an error return. The following code should cope with both types of system.
3539 However, if this process isn't running as root, setgroups() can't be used
3540 since you have to be root to run it, even if throwing away groups. Not being
3541 root here happens only in some unusual configurations. We just ignore the
3544 if (setgroups(0, NULL) != 0)
3546 if (setgroups(1, group_list) != 0 && !unprivileged)
3548 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3553 /* If the configuration file name has been altered by an argument on the
3554 command line (either a new file name or a macro definition) and the caller is
3555 not root, or if this is a filter testing run, remove any setuid privilege the
3556 program has and run as the underlying user.
3558 The exim user is locked out of this, which severely restricts the use of -C
3561 Otherwise, set the real ids to the effective values (should be root unless run
3562 from inetd, which it can either be root or the exim uid, if one is configured).
3564 There is a private mechanism for bypassing some of this, in order to make it
3565 possible to test lots of configurations automatically, without having either to
3566 recompile each time, or to patch in an actual configuration file name and other
3567 values (such as the path name). If running in the test harness, pretend that
3568 configuration file changes and macro definitions haven't happened. */
3571 (!trusted_config || /* Config changed, or */
3572 !macros_trusted()) && /* impermissible macros and */
3573 real_uid != root_uid && /* Not root, and */
3574 !running_in_test_harness /* Not fudged */
3576 expansion_test /* expansion testing */
3578 filter_test != FTEST_NONE) /* Filter testing */
3580 setgroups(group_count, group_list);
3581 exim_setugid(real_uid, real_gid, FALSE,
3582 US"-C, -D, -be or -bf forces real uid");
3583 removed_privilege = TRUE;
3585 /* In the normal case when Exim is called like this, stderr is available
3586 and should be used for any logging information because attempts to write
3587 to the log will usually fail. To arrange this, we unset really_exim. However,
3588 if no stderr is available there is no point - we might as well have a go
3589 at the log (if it fails, syslog will be written).
3591 Note that if the invoker is Exim, the logs remain available. Messing with
3592 this causes unlogged successful deliveries. */
3594 if ((log_stderr != NULL) && (real_uid != exim_uid))
3595 really_exim = FALSE;
3598 /* Privilege is to be retained for the moment. It may be dropped later,
3599 depending on the job that this Exim process has been asked to do. For now, set
3600 the real uid to the effective so that subsequent re-execs of Exim are done by a
3603 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3605 /* If testing a filter, open the file(s) now, before wasting time doing other
3606 setups and reading the message. */
3608 if ((filter_test & FTEST_SYSTEM) != 0)
3610 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3613 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3615 return EXIT_FAILURE;
3619 if ((filter_test & FTEST_USER) != 0)
3621 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3624 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3626 return EXIT_FAILURE;
3630 /* Initialise lookup_list
3631 If debugging, already called above via version reporting.
3632 In either case, we initialise the list of available lookups while running
3633 as root. All dynamically modules are loaded from a directory which is
3634 hard-coded into the binary and is code which, if not a module, would be
3635 part of Exim already. Ability to modify the content of the directory
3636 is equivalent to the ability to modify a setuid binary!
3638 This needs to happen before we read the main configuration. */
3641 /* Read the main runtime configuration data; this gives up if there
3642 is a failure. It leaves the configuration file open so that the subsequent
3643 configuration data for delivery can be read if needed. */
3647 /* If an action on specific messages is requested, or if a daemon or queue
3648 runner is being started, we need to know if Exim was called by an admin user.
3649 This is the case if the real user is root or exim, or if the real group is
3650 exim, or if one of the supplementary groups is exim or a group listed in
3651 admin_groups. We don't fail all message actions immediately if not admin_user,
3652 since some actions can be performed by non-admin users. Instead, set admin_user
3653 for later interrogation. */
3655 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3660 for (i = 0; i < group_count; i++)
3662 if (group_list[i] == exim_gid) admin_user = TRUE;
3663 else if (admin_groups != NULL)
3665 for (j = 1; j <= (int)(admin_groups[0]); j++)
3666 if (admin_groups[j] == group_list[i])
3667 { admin_user = TRUE; break; }
3669 if (admin_user) break;
3673 /* Another group of privileged users are the trusted users. These are root,
3674 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3675 are permitted to specify sender_addresses with -f on the command line, and
3676 other message parameters as well. */
3678 if (real_uid == root_uid || real_uid == exim_uid)
3679 trusted_caller = TRUE;
3684 if (trusted_users != NULL)
3686 for (i = 1; i <= (int)(trusted_users[0]); i++)
3687 if (trusted_users[i] == real_uid)
3688 { trusted_caller = TRUE; break; }
3691 if (!trusted_caller && trusted_groups != NULL)
3693 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3695 if (trusted_groups[i] == real_gid)
3696 trusted_caller = TRUE;
3697 else for (j = 0; j < group_count; j++)
3699 if (trusted_groups[i] == group_list[j])
3700 { trusted_caller = TRUE; break; }
3702 if (trusted_caller) break;
3707 /* Handle the decoding of logging options. */
3709 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3710 log_selector_string, log_options, log_options_count, US"log", 0);
3714 debug_printf("configuration file is %s\n", config_main_filename);
3715 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3716 log_extra_selector);
3719 /* If domain literals are not allowed, check the sender address that was
3720 supplied with -f. Ditto for a stripped trailing dot. */
3722 if (sender_address != NULL)
3724 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3726 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3727 "allowed\n", sender_address);
3728 return EXIT_FAILURE;
3730 if (f_end_dot && !strip_trailing_dot)
3732 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3733 "(trailing dot not allowed)\n", sender_address);
3734 return EXIT_FAILURE;
3738 /* See if an admin user overrode our logging. */
3740 if (cmdline_syslog_name != NULL)
3744 syslog_processname = cmdline_syslog_name;
3745 log_file_path = string_copy(CUS"syslog");
3749 /* not a panic, non-privileged users should not be able to spam paniclog */
3751 "exim: you lack sufficient privilege to specify syslog process name\n");
3752 return EXIT_FAILURE;
3756 /* Paranoia check of maximum lengths of certain strings. There is a check
3757 on the length of the log file path in log.c, which will come into effect
3758 if there are any calls to write the log earlier than this. However, if we
3759 get this far but the string is very long, it is better to stop now than to
3760 carry on and (e.g.) receive a message and then have to collapse. The call to
3761 log_write() from here will cause the ultimate panic collapse if the complete
3762 file name exceeds the buffer length. */
3764 if (Ustrlen(log_file_path) > 200)
3765 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3766 "log_file_path is longer than 200 chars: aborting");
3768 if (Ustrlen(pid_file_path) > 200)
3769 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3770 "pid_file_path is longer than 200 chars: aborting");
3772 if (Ustrlen(spool_directory) > 200)
3773 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3774 "spool_directory is longer than 200 chars: aborting");
3776 /* Length check on the process name given to syslog for its TAG field,
3777 which is only permitted to be 32 characters or less. See RFC 3164. */
3779 if (Ustrlen(syslog_processname) > 32)
3780 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3781 "syslog_processname is longer than 32 chars: aborting");
3783 /* In some operating systems, the environment variable TMPDIR controls where
3784 temporary files are created; Exim doesn't use these (apart from when delivering
3785 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3786 If TMPDIR is found in the environment, reset it to the value defined in the
3787 TMPDIR macro, if this macro is defined. */
3792 for (p = USS environ; *p != NULL; p++)
3794 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3795 Ustrcmp(*p+7, TMPDIR) != 0)
3797 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3798 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3800 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3806 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3807 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3808 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3809 called by a user who has set the TZ variable. This then affects the timestamps
3810 in log files and in Received: headers, and any created Date: header lines. The
3811 required timezone is settable in the configuration file, so nothing can be done
3812 about this earlier - but hopefully nothing will normally be logged earlier than
3813 this. We have to make a new environment if TZ is wrong, but don't bother if
3814 timestamps_utc is set, because then all times are in UTC anyway. */
3816 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3818 timestamps_utc = TRUE;
3822 uschar *envtz = US getenv("TZ");
3823 if ((envtz == NULL && timezone_string != NULL) ||
3825 (timezone_string == NULL ||
3826 Ustrcmp(timezone_string, envtz) != 0)))
3828 uschar **p = USS environ;
3832 while (*p++ != NULL) count++;
3833 if (envtz == NULL) count++;
3834 newp = new = malloc(sizeof(uschar *) * (count + 1));
3835 for (p = USS environ; *p != NULL; p++)
3837 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3840 if (timezone_string != NULL)
3842 *newp = malloc(Ustrlen(timezone_string) + 4);
3843 sprintf(CS *newp++, "TZ=%s", timezone_string);
3848 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3849 tod_stamp(tod_log));
3853 /* Handle the case when we have removed the setuid privilege because of -C or
3854 -D. This means that the caller of Exim was not root.
3856 There is a problem if we were running as the Exim user. The sysadmin may
3857 expect this case to retain privilege because "the binary was called by the
3858 Exim user", but it hasn't, because either the -D option set macros, or the
3859 -C option set a non-trusted configuration file. There are two possibilities:
3861 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3862 to do message deliveries. Thus, the fact that it is running as a
3863 non-privileged user is plausible, and might be wanted in some special
3864 configurations. However, really_exim will have been set false when
3865 privilege was dropped, to stop Exim trying to write to its normal log
3866 files. Therefore, re-enable normal log processing, assuming the sysadmin
3867 has set up the log directory correctly.
3869 (2) If deliver_drop_privilege is not set, the configuration won't work as
3870 apparently intended, and so we log a panic message. In order to retain
3871 root for -C or -D, the caller must either be root or be invoking a
3872 trusted configuration file (when deliver_drop_privilege is false). */
3874 if (removed_privilege && (!trusted_config || macros != NULL) &&
3875 real_uid == exim_uid)
3877 if (deliver_drop_privilege)
3878 really_exim = TRUE; /* let logging work normally */
3880 log_write(0, LOG_MAIN|LOG_PANIC,
3881 "exim user lost privilege for using %s option",
3882 trusted_config? "-D" : "-C");
3885 /* Start up Perl interpreter if Perl support is configured and there is a
3886 perl_startup option, and the configuration or the command line specifies
3887 initializing starting. Note that the global variables are actually called
3888 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3891 if (perl_start_option != 0)
3892 opt_perl_at_start = (perl_start_option > 0);
3893 if (opt_perl_at_start && opt_perl_startup != NULL)
3896 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3897 errstr = init_perl(opt_perl_startup);
3900 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3901 return EXIT_FAILURE;
3903 opt_perl_started = TRUE;
3905 #endif /* EXIM_PERL */
3907 /* Log the arguments of the call if the configuration file said so. This is
3908 a debugging feature for finding out what arguments certain MUAs actually use.
3909 Don't attempt it if logging is disabled, or if listing variables or if
3910 verifying/testing addresses or expansions. */
3912 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3913 && really_exim && !list_options && !checking)
3916 uschar *p = big_buffer;
3918 Ustrcpy(p, "cwd= (failed)");
3919 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
3921 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3923 for (i = 0; i < argc; i++)
3925 int len = Ustrlen(argv[i]);
3928 if (p + len + 8 >= big_buffer + big_buffer_size)
3931 log_write(0, LOG_MAIN, "%s", big_buffer);
3932 Ustrcpy(big_buffer, "...");
3935 printing = string_printing(argv[i]);
3936 if (printing[0] == 0) quote = US"\""; else
3938 uschar *pp = printing;
3940 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3942 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3943 (p - big_buffer) - 4), printing, quote);
3947 if ((log_extra_selector & LX_arguments) != 0)
3948 log_write(0, LOG_MAIN, "%s", big_buffer);
3950 debug_printf("%s\n", big_buffer);
3953 /* Set the working directory to be the top-level spool directory. We don't rely
3954 on this in the code, which always uses fully qualified names, but it's useful
3955 for core dumps etc. Don't complain if it fails - the spool directory might not
3956 be generally accessible and calls with the -C option (and others) have lost
3957 privilege by now. Before the chdir, we try to ensure that the directory exists.
3960 if (Uchdir(spool_directory) != 0)
3963 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3964 dummy = /* quieten compiler */ Uchdir(spool_directory);
3967 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3968 alias file. Exim doesn't have such a concept, but this call is screwed into
3969 Sun's YP makefiles. Handle this by calling a configured script, as the real
3970 user who called Exim. The -oA option can be used to pass an argument to the
3975 (void)fclose(config_file);
3976 if (bi_command != NULL)
3980 argv[i++] = bi_command;
3981 if (alias_arg != NULL) argv[i++] = alias_arg;
3984 setgroups(group_count, group_list);
3985 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3987 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3988 (argv[1] == NULL)? US"" : argv[1]);
3990 execv(CS argv[0], (char *const *)argv);
3991 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3996 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4001 /* We moved the admin/trusted check to be immediately after reading the
4002 configuration file. We leave these prints here to ensure that syslog setup,
4003 logfile setup, and so on has already happened. */
4005 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4006 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4008 /* Only an admin user may start the daemon or force a queue run in the default
4009 configuration, but the queue run restriction can be relaxed. Only an admin
4010 user may request that a message be returned to its sender forthwith. Only an
4011 admin user may specify a debug level greater than D_v (because it might show
4012 passwords, etc. in lookup queries). Only an admin user may request a queue
4013 count. Only an admin user can use the test interface to scan for email
4014 (because Exim will be in the spool dir and able to look at mails). */
4018 BOOL debugset = (debug_selector & ~D_v) != 0;
4019 if (deliver_give_up || daemon_listen || malware_test_file ||
4020 (count_queue && queue_list_requires_admin) ||
4021 (list_queue && queue_list_requires_admin) ||
4022 (queue_interval >= 0 && prod_requires_admin) ||
4023 (debugset && !running_in_test_harness))
4025 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4030 /* If the real user is not root or the exim uid, the argument for passing
4031 in an open TCP/IP connection for another message is not permitted, nor is
4032 running with the -N option for any delivery action, unless this call to exim is
4033 one that supplied an input message, or we are using a patched exim for
4034 regression testing. */
4036 if (real_uid != root_uid && real_uid != exim_uid &&
4037 (continue_hostname != NULL ||
4039 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4040 )) && !running_in_test_harness)
4042 fprintf(stderr, "exim: Permission denied\n");
4043 return EXIT_FAILURE;
4046 /* If the caller is not trusted, certain arguments are ignored when running for
4047 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4048 Note that authority for performing certain actions on messages is tested in the
4049 queue_action() function. */
4051 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4053 sender_host_name = sender_host_address = interface_address =
4054 sender_ident = received_protocol = NULL;
4055 sender_host_port = interface_port = 0;
4056 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4059 /* If a sender host address is set, extract the optional port number off the
4060 end of it and check its syntax. Do the same thing for the interface address.
4061 Exim exits if the syntax is bad. */
4065 if (sender_host_address != NULL)
4066 sender_host_port = check_port(sender_host_address);
4067 if (interface_address != NULL)
4068 interface_port = check_port(interface_address);
4071 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4076 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4077 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4081 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4082 return EXIT_FAILURE;
4086 /* If an SMTP message is being received check to see if the standard input is a
4087 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4088 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4093 union sockaddr_46 inetd_sock;
4094 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4095 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4097 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4098 if (family == AF_INET || family == AF_INET6)
4100 union sockaddr_46 interface_sock;
4101 size = sizeof(interface_sock);
4103 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4104 interface_address = host_ntoa(-1, &interface_sock, NULL,
4107 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4109 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4112 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4113 NULL, &sender_host_port);
4114 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4115 "inetd is not supported when mua_wrapper is set");
4120 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4121 return EXIT_FAILURE;
4127 /* If the load average is going to be needed while receiving a message, get it
4128 now for those OS that require the first call to os_getloadavg() to be done as
4129 root. There will be further calls later for each message received. */
4131 #ifdef LOAD_AVG_NEEDS_ROOT
4132 if (receiving_message &&
4133 (queue_only_load >= 0 ||
4134 (is_inetd && smtp_load_reserve >= 0)
4137 load_average = OS_GETLOADAVG();
4141 /* The queue_only configuration option can be overridden by -odx on the command
4142 line, except that if queue_only_override is false, queue_only cannot be unset
4143 from the command line. */
4145 if (queue_only_set && (queue_only_override || arg_queue_only))
4146 queue_only = arg_queue_only;
4148 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4151 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4152 if (arg_smtp_receive_timeout >= 0)
4153 smtp_receive_timeout = arg_smtp_receive_timeout;
4155 /* If Exim was started with root privilege, unless we have already removed the
4156 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4157 except when starting the daemon or doing some kind of delivery or address
4158 testing (-bt). These are the only cases when root need to be retained. We run
4159 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4160 retained only for starting the daemon. We always do the initgroups() in this
4161 situation (controlled by the TRUE below), in order to be as close as possible
4162 to the state Exim usually runs in. */
4164 if (!unprivileged && /* originally had root AND */
4165 !removed_privilege && /* still got root AND */
4166 !daemon_listen && /* not starting the daemon */
4167 queue_interval <= 0 && /* (either kind of daemon) */
4169 deliver_drop_privilege || /* requested unprivileged */
4171 queue_interval < 0 && /* not running the queue */
4172 (msg_action_arg < 0 || /* and */
4173 msg_action != MSG_DELIVER) && /* not delivering and */
4174 (!checking || !address_test_mode) /* not address checking */
4178 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4181 /* When we are retaining a privileged uid, we still change to the exim gid. */
4186 rv = setgid(exim_gid);
4187 /* Impact of failure is that some stuff might end up with an incorrect group.
4188 We track this for failures from root, since any attempt to change privilege
4189 by root should succeed and failures should be examined. For non-root,
4190 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4191 no need to complain then. */
4194 if (!(unprivileged || removed_privilege))
4197 "exim: changing group failed: %s\n", strerror(errno));
4201 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4202 (long int)exim_gid, strerror(errno));
4206 /* Handle a request to scan a file for malware */
4207 if (malware_test_file)
4209 #ifdef WITH_CONTENT_SCAN
4211 set_process_info("scanning file for malware");
4212 result = malware_in_file(malware_test_file);
4215 printf("No malware found.\n");
4220 printf("Malware lookup returned non-okay/fail: %d\n", result);
4224 printf("Malware found: %s\n", malware_name);
4226 printf("Malware scan detected malware of unknown name.\n");
4228 printf("Malware scanning not enabled at compile time.\n");
4233 /* Handle a request to list the delivery queue */
4237 set_process_info("listing the queue");
4238 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4242 /* Handle a request to count the delivery queue */
4246 set_process_info("counting the queue");
4251 /* Handle actions on specific messages, except for the force delivery and
4252 message load actions, which are done below. Some actions take a whole list of
4253 message ids, which are known to continue up to the end of the arguments. Others
4254 take a single message id and then operate on the recipients list. */
4256 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4258 int yield = EXIT_SUCCESS;
4259 set_process_info("acting on specified messages");
4261 if (!one_msg_action)
4263 for (i = msg_action_arg; i < argc; i++)
4264 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4265 yield = EXIT_FAILURE;
4268 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4269 recipients_arg)) yield = EXIT_FAILURE;
4273 /* We used to set up here to skip reading the ACL section, on
4274 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4275 Now, since the intro of the ${acl } expansion, ACL definitions may be
4276 needed in transports so we lost the optimisation. */
4280 /* The configuration data will have been read into POOL_PERM because we won't
4281 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4282 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4283 configuration were read into POOL_MAIN, because we don't do any resets till
4284 later on. However, it seems right, and it does ensure that both pools get used.
4287 store_pool = POOL_MAIN;
4289 /* Handle the -brt option. This is for checking out retry configurations.
4290 The next three arguments are a domain name or a complete address, and
4291 optionally two error numbers. All it does is to call the function that
4292 scans the retry configuration data. */
4294 if (test_retry_arg >= 0)
4296 retry_config *yield;
4297 int basic_errno = 0;
4301 if (test_retry_arg >= argc)
4303 printf("-brt needs a domain or address argument\n");
4304 exim_exit(EXIT_FAILURE);
4306 s1 = argv[test_retry_arg++];
4309 /* If the first argument contains no @ and no . it might be a local user
4310 or it might be a single-component name. Treat as a domain. */
4312 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4314 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4315 "being \ntreated as a one-component domain, not as a local part.\n\n",
4319 /* There may be an optional second domain arg. */
4321 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4322 s2 = argv[test_retry_arg++];
4324 /* The final arg is an error name */
4326 if (test_retry_arg < argc)
4328 uschar *ss = argv[test_retry_arg];
4330 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4333 printf("%s\n", CS error);
4334 return EXIT_FAILURE;
4337 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4338 code > 100 as an error is for matching codes to the decade. Turn them into
4339 a real error code, off the decade. */
4341 if (basic_errno == ERRNO_MAIL4XX ||
4342 basic_errno == ERRNO_RCPT4XX ||
4343 basic_errno == ERRNO_DATA4XX)
4345 int code = (more_errno >> 8) & 255;
4347 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4348 else if (code > 100)
4349 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4353 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4354 if (yield == NULL) printf("No retry information found\n"); else
4357 more_errno = yield->more_errno;
4358 printf("Retry rule: %s ", yield->pattern);
4360 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4362 printf("quota%s%s ",
4363 (more_errno > 0)? "_" : "",
4364 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4366 else if (yield->basic_errno == ECONNREFUSED)
4368 printf("refused%s%s ",
4369 (more_errno > 0)? "_" : "",
4370 (more_errno == 'M')? "MX" :
4371 (more_errno == 'A')? "A" : "");
4373 else if (yield->basic_errno == ETIMEDOUT)
4376 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4378 if (more_errno != 0) printf("_%s",
4379 (more_errno == 'M')? "MX" : "A");
4382 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4383 printf("auth_failed ");
4386 for (r = yield->rules; r != NULL; r = r->next)
4388 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4389 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4395 printf(",%d.", x/1000);
4409 exim_exit(EXIT_SUCCESS);
4412 /* Handle a request to list one or more configuration options */
4413 /* If -n was set, we suppress some information */
4417 set_process_info("listing variables");
4418 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4419 else for (i = recipients_arg; i < argc; i++)
4422 (Ustrcmp(argv[i], "router") == 0 ||
4423 Ustrcmp(argv[i], "transport") == 0 ||
4424 Ustrcmp(argv[i], "authenticator") == 0 ||
4425 Ustrcmp(argv[i], "macro") == 0))
4427 readconf_print(argv[i+1], argv[i], flag_n);
4430 else readconf_print(argv[i], NULL, flag_n);
4432 exim_exit(EXIT_SUCCESS);
4436 /* Handle a request to deliver one or more messages that are already on the
4437 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4438 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4440 Delivery of specific messages is typically used for a small number when
4441 prodding by hand (when the option forced_delivery will be set) or when
4442 re-execing to regain root privilege. Each message delivery must happen in a
4443 separate process, so we fork a process for each one, and run them sequentially
4444 so that debugging output doesn't get intertwined, and to avoid spawning too
4445 many processes if a long list is given. However, don't fork for the last one;
4446 this saves a process in the common case when Exim is called to deliver just one
4449 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4451 if (prod_requires_admin && !admin_user)
4453 fprintf(stderr, "exim: Permission denied\n");
4454 exim_exit(EXIT_FAILURE);
4456 set_process_info("delivering specified messages");
4457 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4458 for (i = msg_action_arg; i < argc; i++)
4463 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4464 else if ((pid = fork()) == 0)
4466 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4467 _exit(EXIT_SUCCESS);
4471 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4473 exim_exit(EXIT_FAILURE);
4477 exim_exit(EXIT_SUCCESS);
4481 /* If only a single queue run is requested, without SMTP listening, we can just
4482 turn into a queue runner, with an optional starting message id. */
4484 if (queue_interval == 0 && !daemon_listen)
4486 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4487 (start_queue_run_id == NULL)? US"" : US" starting at ",
4488 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4489 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4490 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4491 set_process_info("running the queue (single queue run)");
4492 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4493 exim_exit(EXIT_SUCCESS);
4497 /* Find the login name of the real user running this process. This is always
4498 needed when receiving a message, because it is written into the spool file. It
4499 may also be used to construct a from: or a sender: header, and in this case we
4500 need the user's full name as well, so save a copy of it, checked for RFC822
4501 syntax and munged if necessary, if it hasn't previously been set by the -F
4502 argument. We may try to get the passwd entry more than once, in case NIS or
4503 other delays are in evidence. Save the home directory for use in filter testing
4508 if ((pw = getpwuid(real_uid)) != NULL)
4510 originator_login = string_copy(US pw->pw_name);
4511 originator_home = string_copy(US pw->pw_dir);
4513 /* If user name has not been set by -F, set it from the passwd entry
4514 unless -f has been used to set the sender address by a trusted user. */
4516 if (originator_name == NULL)
4518 if (sender_address == NULL ||
4519 (!trusted_caller && filter_test == FTEST_NONE))
4521 uschar *name = US pw->pw_gecos;
4522 uschar *amp = Ustrchr(name, '&');
4525 /* Most Unix specify that a '&' character in the gecos field is
4526 replaced by a copy of the login name, and some even specify that
4527 the first character should be upper cased, so that's what we do. */
4532 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4533 amp - name, name, &loffset, originator_login, amp + 1);
4534 buffer[loffset] = toupper(buffer[loffset]);
4538 /* If a pattern for matching the gecos field was supplied, apply
4539 it and then expand the name string. */
4541 if (gecos_pattern != NULL && gecos_name != NULL)
4544 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4546 if (regex_match_and_setup(re, name, 0, -1))
4548 uschar *new_name = expand_string(gecos_name);
4550 if (new_name != NULL)
4552 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4553 "gecos field \"%s\"\n", new_name, name);
4556 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4557 "\"%s\": %s\n", gecos_name, expand_string_message);
4559 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4560 "gecos field \"%s\"\n", gecos_pattern, name);
4561 store_free((void *)re);
4563 originator_name = string_copy(name);
4566 /* A trusted caller has used -f but not -F */
4568 else originator_name = US"";
4571 /* Break the retry loop */
4576 if (++i > finduser_retries) break;
4580 /* If we cannot get a user login, log the incident and give up, unless the
4581 configuration specifies something to use. When running in the test harness,
4582 any setting of unknown_login overrides the actual name. */
4584 if (originator_login == NULL || running_in_test_harness)
4586 if (unknown_login != NULL)
4588 originator_login = expand_string(unknown_login);
4589 if (originator_name == NULL && unknown_username != NULL)
4590 originator_name = expand_string(unknown_username);
4591 if (originator_name == NULL) originator_name = US"";
4593 if (originator_login == NULL)
4594 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4598 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4601 originator_name = string_copy(parse_fix_phrase(originator_name,
4602 Ustrlen(originator_name), big_buffer, big_buffer_size));
4604 /* If a message is created by this call of Exim, the uid/gid of its originator
4605 are those of the caller. These values are overridden if an existing message is
4606 read in from the spool. */
4608 originator_uid = real_uid;
4609 originator_gid = real_gid;
4611 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4612 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4614 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4615 returns. We leave this till here so that the originator_ fields are available
4616 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4619 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4623 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4624 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4625 "mua_wrapper is set");
4630 /* If the sender ident has not been set (by a trusted caller) set it to
4631 the caller. This will get overwritten below for an inetd call. If a trusted
4632 caller has set it empty, unset it. */
4634 if (sender_ident == NULL) sender_ident = originator_login;
4635 else if (sender_ident[0] == 0) sender_ident = NULL;
4637 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4638 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4639 originator_* variables set. */
4641 if (test_rewrite_arg >= 0)
4643 really_exim = FALSE;
4644 if (test_rewrite_arg >= argc)
4646 printf("-brw needs an address argument\n");
4647 exim_exit(EXIT_FAILURE);
4649 rewrite_test(argv[test_rewrite_arg]);
4650 exim_exit(EXIT_SUCCESS);
4653 /* A locally-supplied message is considered to be coming from a local user
4654 unless a trusted caller supplies a sender address with -f, or is passing in the
4655 message via SMTP (inetd invocation or otherwise). */
4657 if ((sender_address == NULL && !smtp_input) ||
4658 (!trusted_caller && filter_test == FTEST_NONE))
4660 sender_local = TRUE;
4662 /* A trusted caller can supply authenticated_sender and authenticated_id
4663 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4664 defaults except when host checking. */
4666 if (authenticated_sender == NULL && !host_checking)
4667 authenticated_sender = string_sprintf("%s@%s", originator_login,
4668 qualify_domain_sender);
4669 if (authenticated_id == NULL && !host_checking)
4670 authenticated_id = originator_login;
4673 /* Trusted callers are always permitted to specify the sender address.
4674 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4675 is specified is the empty address. However, if a trusted caller does not
4676 specify a sender address for SMTP input, we leave sender_address unset. This
4677 causes the MAIL commands to be honoured. */
4679 if ((!smtp_input && sender_address == NULL) ||
4680 !receive_check_set_sender(sender_address))
4682 /* Either the caller is not permitted to set a general sender, or this is
4683 non-SMTP input and the trusted caller has not set a sender. If there is no
4684 sender, or if a sender other than <> is set, override with the originator's
4685 login (which will get qualified below), except when checking things. */
4687 if (sender_address == NULL /* No sender_address set */
4689 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4690 !checking && /* Not running tests, AND */
4691 filter_test == FTEST_NONE)) /* Not testing a filter */
4693 sender_address = originator_login;
4694 sender_address_forced = FALSE;
4695 sender_address_domain = 0;
4699 /* Remember whether an untrusted caller set the sender address */
4701 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4703 /* Ensure that the sender address is fully qualified unless it is the empty
4704 address, which indicates an error message, or doesn't exist (root caller, smtp
4705 interface, no -f argument). */
4707 if (sender_address != NULL && sender_address[0] != 0 &&
4708 sender_address_domain == 0)
4709 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4710 qualify_domain_sender);
4712 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4714 /* Handle a request to verify a list of addresses, or test them for delivery.
4715 This must follow the setting of the sender address, since routers can be
4716 predicated upon the sender. If no arguments are given, read addresses from
4717 stdin. Set debug_level to at least D_v to get full output for address testing.
4720 if (verify_address_mode || address_test_mode)
4723 int flags = vopt_qualify;
4725 if (verify_address_mode)
4727 if (!verify_as_sender) flags |= vopt_is_recipient;
4728 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4733 flags |= vopt_is_recipient;
4734 debug_selector |= D_v;
4735 debug_file = stderr;
4736 debug_fd = fileno(debug_file);
4737 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4740 if (recipients_arg < argc)
4742 while (recipients_arg < argc)
4744 uschar *s = argv[recipients_arg++];
4747 BOOL finished = FALSE;
4748 uschar *ss = parse_find_address_end(s, FALSE);
4749 if (*ss == ',') *ss = 0; else finished = TRUE;
4750 test_address(s, flags, &exit_value);
4753 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4760 uschar *s = get_stdinput(NULL, NULL);
4761 if (s == NULL) break;
4762 test_address(s, flags, &exit_value);
4766 exim_exit(exit_value);
4769 /* Handle expansion checking. Either expand items on the command line, or read
4770 from stdin if there aren't any. If -Mset was specified, load the message so
4771 that its variables can be used, but restrict this facility to admin users.
4772 Otherwise, if -bem was used, read a message from stdin. */
4776 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4778 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4781 fprintf(stderr, "exim: permission denied\n");
4784 message_id = argv[msg_action_arg];
4785 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4786 if (!spool_open_datafile(message_id))
4787 printf ("Failed to load message datafile %s\n", message_id);
4788 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4789 printf ("Failed to load message %s\n", message_id);
4792 /* Read a test message from a file. We fudge it up to be on stdin, saving
4793 stdin itself for later reading of expansion strings. */
4795 else if (expansion_test_message != NULL)
4797 int save_stdin = dup(0);
4798 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4801 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4803 return EXIT_FAILURE;
4806 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4807 message_ended = END_NOTENDED;
4808 read_message_body(receive_msg(extract_recipients));
4809 message_linecount += body_linecount;
4810 (void)dup2(save_stdin, 0);
4811 (void)close(save_stdin);
4812 clearerr(stdin); /* Required by Darwin */
4815 /* Allow $recipients for this testing */
4817 enable_dollar_recipients = TRUE;
4819 /* Expand command line items */
4821 if (recipients_arg < argc)
4823 while (recipients_arg < argc)
4825 uschar *s = argv[recipients_arg++];
4826 uschar *ss = expand_string(s);
4827 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4828 else printf("%s\n", CS ss);
4836 char *(*fn_readline)(const char *) = NULL;
4837 void (*fn_addhist)(const char *) = NULL;
4840 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4846 uschar *source = get_stdinput(fn_readline, fn_addhist);
4847 if (source == NULL) break;
4848 ss = expand_string(source);
4850 printf ("Failed: %s\n", expand_string_message);
4851 else printf("%s\n", CS ss);
4855 if (dlhandle != NULL) dlclose(dlhandle);
4859 /* The data file will be open after -Mset */
4861 if (deliver_datafile >= 0)
4863 (void)close(deliver_datafile);
4864 deliver_datafile = -1;
4867 exim_exit(EXIT_SUCCESS);
4871 /* The active host name is normally the primary host name, but it can be varied
4872 for hosts that want to play several parts at once. We need to ensure that it is
4873 set for host checking, and for receiving messages. */
4875 smtp_active_hostname = primary_hostname;
4876 if (raw_active_hostname != NULL)
4878 uschar *nah = expand_string(raw_active_hostname);
4881 if (!expand_string_forcedfail)
4882 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4883 "(smtp_active_hostname): %s", raw_active_hostname,
4884 expand_string_message);
4886 else if (nah[0] != 0) smtp_active_hostname = nah;
4889 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4890 given IP address so that the blocking and relay configuration can be tested.
4891 Unless a sender_ident was set by -oMt, we discard it (the default is the
4892 caller's login name). An RFC 1413 call is made only if we are running in the
4893 test harness and an incoming interface and both ports are specified, because
4894 there is no TCP/IP call to find the ident for. */
4901 if (!sender_ident_set)
4903 sender_ident = NULL;
4904 if (running_in_test_harness && sender_host_port != 0 &&
4905 interface_address != NULL && interface_port != 0)
4906 verify_get_ident(1413);
4909 /* In case the given address is a non-canonical IPv6 address, canonicize
4910 it. The code works for both IPv4 and IPv6, as it happens. */
4912 size = host_aton(sender_host_address, x);
4913 sender_host_address = store_get(48); /* large enough for full IPv6 */
4914 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4916 /* Now set up for testing */
4918 host_build_sender_fullhost();
4922 sender_local = FALSE;
4923 sender_host_notsocket = TRUE;
4924 debug_file = stderr;
4925 debug_fd = fileno(debug_file);
4926 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4927 "**** but without any ident (RFC 1413) callback.\n"
4928 "**** This is not for real!\n\n",
4929 sender_host_address);
4931 if (verify_check_host(&hosts_connection_nolog) == OK)
4932 log_write_selector &= ~L_smtp_connection;
4933 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4935 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4936 because a log line has already been written for all its failure exists
4937 (usually "connection refused: <reason>") and writing another one is
4938 unnecessary clutter. */
4940 if (smtp_start_session())
4942 reset_point = store_get(0);
4945 store_reset(reset_point);
4946 if (smtp_setup_msg() <= 0) break;
4947 if (!receive_msg(FALSE)) break;
4951 exim_exit(EXIT_SUCCESS);
4955 /* Arrange for message reception if recipients or SMTP were specified;
4956 otherwise complain unless a version print (-bV) happened or this is a filter
4957 verification test or info dump.
4958 In the former case, show the configuration file name. */
4960 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4962 if (version_printed)
4964 printf("Configuration file is %s\n", config_main_filename);
4965 return EXIT_SUCCESS;
4968 if (info_flag != CMDINFO_NONE)
4970 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4971 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4974 if (filter_test == FTEST_NONE)
4975 exim_usage(called_as);
4979 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4980 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4981 that we are not called from inetd, because that is rejected above. The
4982 following configuration settings are forced here:
4984 (1) Synchronous delivery (-odi)
4985 (2) Errors to stderr (-oep == -oeq)
4986 (3) No parallel remote delivery
4987 (4) Unprivileged delivery
4989 We don't force overall queueing options because there are several of them;
4990 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4991 to override any SMTP queueing. */
4995 synchronous_delivery = TRUE;
4996 arg_error_handling = ERRORS_STDERR;
4997 remote_max_parallel = 1;
4998 deliver_drop_privilege = TRUE;
5000 queue_smtp_domains = NULL;
5004 /* Prepare to accept one or more new messages on the standard input. When a
5005 message has been read, its id is returned in message_id[]. If doing immediate
5006 delivery, we fork a delivery process for each received message, except for the
5007 last one, where we can save a process switch.
5009 It is only in non-smtp mode that error_handling is allowed to be changed from
5010 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5011 sendmail error modes other than -oem ever actually used? Later: yes.) */
5013 if (!smtp_input) error_handling = arg_error_handling;
5015 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5016 logging being sent down the socket and make an identd call to get the
5021 (void)fclose(stderr);
5022 exim_nullstd(); /* Re-open to /dev/null */
5023 verify_get_ident(IDENT_PORT);
5024 host_build_sender_fullhost();
5025 set_process_info("handling incoming connection from %s via inetd",
5029 /* If the sender host address has been set, build sender_fullhost if it hasn't
5030 already been done (which it will have been for inetd). This caters for the
5031 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5032 so that the test for IP options is skipped for -bs input. */
5034 if (sender_host_address != NULL && sender_fullhost == NULL)
5036 host_build_sender_fullhost();
5037 set_process_info("handling incoming connection from %s via -oMa",
5039 sender_host_notsocket = TRUE;
5042 /* Otherwise, set the sender host as unknown except for inetd calls. This
5043 prevents host checking in the case of -bs not from inetd and also for -bS. */
5045 else if (!is_inetd) sender_host_unknown = TRUE;
5047 /* If stdout does not exist, then dup stdin to stdout. This can happen
5048 if exim is started from inetd. In this case fd 0 will be set to the socket,
5049 but fd 1 will not be set. This also happens for passed SMTP channels. */
5051 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5053 /* Set up the incoming protocol name and the state of the program. Root is
5054 allowed to force received protocol via the -oMr option above. If we have come
5055 via inetd, the process info has already been set up. We don't set
5056 received_protocol here for smtp input, as it varies according to
5057 batch/HELO/EHLO/AUTH/TLS. */
5061 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5062 smtp_batched_input? "batched " : "",
5063 (sender_address!= NULL)? sender_address : originator_login);
5067 if (received_protocol == NULL)
5068 received_protocol = string_sprintf("local%s", called_as);
5069 set_process_info("accepting a local non-SMTP message from <%s>",
5073 /* Initialize the session_local_queue-only flag (this will be ignored if
5074 mua_wrapper is set) */
5077 session_local_queue_only = queue_only;
5079 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5080 the spool if so configured. On failure, we must not attempt to send an error
5081 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5082 error code is given.) */
5084 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5086 fprintf(stderr, "exim: insufficient disk space\n");
5087 return EXIT_FAILURE;
5090 /* If this is smtp input of any kind, real or batched, handle the start of the
5093 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5094 because a log line has already been written for all its failure exists
5095 (usually "connection refused: <reason>") and writing another one is
5096 unnecessary clutter. */
5102 if (verify_check_host(&hosts_connection_nolog) == OK)
5103 log_write_selector &= ~L_smtp_connection;
5104 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5105 if (!smtp_start_session())
5108 exim_exit(EXIT_SUCCESS);
5112 /* Otherwise, set up the input size limit here. */
5116 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5117 if (expand_string_message != NULL)
5119 if (thismessage_size_limit == -1)
5120 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5121 "message_size_limit: %s", expand_string_message);
5123 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5124 "message_size_limit: %s", expand_string_message);
5128 /* Loop for several messages when reading SMTP input. If we fork any child
5129 processes, we don't want to wait for them unless synchronous delivery is
5130 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5131 same as SIG_DFL, despite the fact that documentation often lists the default as
5132 "ignore". This is a confusing area. This is what I know:
5134 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5135 processes that complete simply to go away without ever becoming defunct. You
5136 can't then wait for them - but we don't want to wait for them in the
5137 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5138 happen for all OS (e.g. *BSD is different).
5140 But that's not the end of the story. Some (many? all?) systems have the
5141 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5142 has by default, so it seems that the difference is merely one of default
5143 (compare restarting vs non-restarting signals).
5145 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5146 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5147 of the loop below. Paranoia rules.
5149 February 2003: That's *still* not the end of the story. There are now versions
5150 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5151 process then calls waitpid(), a grumble is written to the system log, because
5152 this is logically inconsistent. In other words, it doesn't like the paranoia.
5153 As a consequenc of this, the waitpid() below is now excluded if we are sure
5154 that SIG_IGN works. */
5156 if (!synchronous_delivery)
5159 struct sigaction act;
5160 act.sa_handler = SIG_IGN;
5161 sigemptyset(&(act.sa_mask));
5162 act.sa_flags = SA_NOCLDWAIT;
5163 sigaction(SIGCHLD, &act, NULL);
5165 signal(SIGCHLD, SIG_IGN);
5169 /* Save the current store pool point, for resetting at the start of
5170 each message, and save the real sender address, if any. */
5172 reset_point = store_get(0);
5173 real_sender_address = sender_address;
5175 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5176 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5181 store_reset(reset_point);
5184 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5185 input and build the recipients list, before calling receive_msg() to read the
5186 message proper. Whatever sender address is given in the SMTP transaction is
5187 often ignored for local senders - we use the actual sender, which is normally
5188 either the underlying user running this process or a -f argument provided by
5189 a trusted caller. It is saved in real_sender_address. The test for whether to
5190 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5195 if ((rc = smtp_setup_msg()) > 0)
5197 if (real_sender_address != NULL &&
5198 !receive_check_set_sender(sender_address))
5200 sender_address = raw_sender = real_sender_address;
5201 sender_address_unrewritten = NULL;
5204 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5205 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5206 the very end. The result of the ACL is ignored (as for other non-SMTP
5207 messages). It is run for its potential side effects. */
5209 if (smtp_batched_input && acl_not_smtp_start != NULL)
5211 uschar *user_msg, *log_msg;
5212 enable_dollar_recipients = TRUE;
5213 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5214 &user_msg, &log_msg);
5215 enable_dollar_recipients = FALSE;
5218 /* Now get the data for the message */
5220 more = receive_msg(extract_recipients);
5221 if (message_id[0] == 0)
5224 smtp_log_no_mail(); /* Log no mail if configured */
5225 exim_exit(EXIT_FAILURE);
5230 smtp_log_no_mail(); /* Log no mail if configured */
5231 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5235 /* In the non-SMTP case, we have all the information from the command
5236 line, but must process it in case it is in the more general RFC822
5237 format, and in any case, to detect syntax errors. Also, it appears that
5238 the use of comma-separated lists as single arguments is common, so we
5239 had better support them. */
5245 int count = argc - recipients_arg;
5246 uschar **list = argv + recipients_arg;
5248 /* These options cannot be changed dynamically for non-SMTP messages */
5250 active_local_sender_retain = local_sender_retain;
5251 active_local_from_check = local_from_check;
5253 /* Save before any rewriting */
5255 raw_sender = string_copy(sender_address);
5257 /* Loop for each argument */
5259 for (i = 0; i < count; i++)
5261 int start, end, domain;
5263 uschar *s = list[i];
5265 /* Loop for each comma-separated address */
5269 BOOL finished = FALSE;
5271 uschar *ss = parse_find_address_end(s, FALSE);
5273 if (*ss == ',') *ss = 0; else finished = TRUE;
5275 /* Check max recipients - if -t was used, these aren't recipients */
5277 if (recipients_max > 0 && ++rcount > recipients_max &&
5278 !extract_recipients)
5280 if (error_handling == ERRORS_STDERR)
5282 fprintf(stderr, "exim: too many recipients\n");
5283 exim_exit(EXIT_FAILURE);
5288 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5289 errors_sender_rc : EXIT_FAILURE;
5294 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5296 if (domain == 0 && !allow_unqualified_recipient)
5299 errmess = US"unqualified recipient address not allowed";
5302 if (recipient == NULL)
5304 if (error_handling == ERRORS_STDERR)
5306 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5307 string_printing(list[i]), errmess);
5308 exim_exit(EXIT_FAILURE);
5314 eblock.text1 = string_printing(list[i]);
5315 eblock.text2 = errmess;
5317 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5318 errors_sender_rc : EXIT_FAILURE;
5322 receive_add_recipient(recipient, -1);
5325 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5329 /* Show the recipients when debugging */
5334 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5335 if (recipients_list != NULL)
5337 debug_printf("Recipients:\n");
5338 for (i = 0; i < recipients_count; i++)
5339 debug_printf(" %s\n", recipients_list[i].address);
5343 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5344 ignored; rejecting here would just add complication, and it can just as
5345 well be done later. Allow $recipients to be visible in the ACL. */
5347 if (acl_not_smtp_start != NULL)
5349 uschar *user_msg, *log_msg;
5350 enable_dollar_recipients = TRUE;
5351 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5352 &user_msg, &log_msg);
5353 enable_dollar_recipients = FALSE;
5356 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5357 will just read the headers for the message, and not write anything onto the
5360 message_ended = END_NOTENDED;
5361 more = receive_msg(extract_recipients);
5363 /* more is always FALSE here (not SMTP message) when reading a message
5364 for real; when reading the headers of a message for filter testing,
5365 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5367 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5368 } /* Non-SMTP message reception */
5370 /* If this is a filter testing run, there are headers in store, but
5371 no message on the spool. Run the filtering code in testing mode, setting
5372 the domain to the qualify domain and the local part to the current user,
5373 unless they have been set by options. The prefix and suffix are left unset
5374 unless specified. The the return path is set to to the sender unless it has
5375 already been set from a return-path header in the message. */
5377 if (filter_test != FTEST_NONE)
5379 deliver_domain = (ftest_domain != NULL)?
5380 ftest_domain : qualify_domain_recipient;
5381 deliver_domain_orig = deliver_domain;
5382 deliver_localpart = (ftest_localpart != NULL)?
5383 ftest_localpart : originator_login;
5384 deliver_localpart_orig = deliver_localpart;
5385 deliver_localpart_prefix = ftest_prefix;
5386 deliver_localpart_suffix = ftest_suffix;
5387 deliver_home = originator_home;
5389 if (return_path == NULL)
5391 printf("Return-path copied from sender\n");
5392 return_path = string_copy(sender_address);
5396 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5398 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5400 receive_add_recipient(
5401 string_sprintf("%s%s%s@%s",
5402 (ftest_prefix == NULL)? US"" : ftest_prefix,
5404 (ftest_suffix == NULL)? US"" : ftest_suffix,
5405 deliver_domain), -1);
5407 printf("Recipient = %s\n", recipients_list[0].address);
5408 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5409 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5411 if (chdir("/")) /* Get away from wherever the user is running this from */
5413 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5414 exim_exit(EXIT_FAILURE);
5417 /* Now we run either a system filter test, or a user filter test, or both.
5418 In the latter case, headers added by the system filter will persist and be
5419 available to the user filter. We need to copy the filter variables
5422 if ((filter_test & FTEST_SYSTEM) != 0)
5424 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5425 exim_exit(EXIT_FAILURE);
5428 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5430 if ((filter_test & FTEST_USER) != 0)
5432 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5433 exim_exit(EXIT_FAILURE);
5436 exim_exit(EXIT_SUCCESS);
5439 /* Else act on the result of message reception. We should not get here unless
5440 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5441 will be TRUE. If it is not, check on the number of messages received in this
5444 if (!session_local_queue_only &&
5445 smtp_accept_queue_per_connection > 0 &&
5446 receive_messagecount > smtp_accept_queue_per_connection)
5448 session_local_queue_only = TRUE;
5449 queue_only_reason = 2;
5452 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5453 and queue_only_load is set, check that the load average is below it. If it is
5454 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5455 default), we put the whole session into queue_only mode. It then remains this
5456 way for any subsequent messages on the same SMTP connection. This is a
5457 deliberate choice; even though the load average may fall, it doesn't seem
5458 right to deliver later messages on the same call when not delivering earlier
5459 ones. However, there are odd cases where this is not wanted, so this can be
5460 changed by setting queue_only_load_latch false. */
5462 local_queue_only = session_local_queue_only;
5463 if (!local_queue_only && queue_only_load >= 0)
5465 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5466 if (local_queue_only)
5468 queue_only_reason = 3;
5469 if (queue_only_load_latch) session_local_queue_only = TRUE;
5473 /* If running as an MUA wrapper, all queueing options and freezing options
5477 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5479 /* Log the queueing here, when it will get a message id attached, but
5480 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5483 if (local_queue_only) switch(queue_only_reason)
5486 log_write(L_delay_delivery,
5487 LOG_MAIN, "no immediate delivery: more than %d messages "
5488 "received in one connection", smtp_accept_queue_per_connection);
5492 log_write(L_delay_delivery,
5493 LOG_MAIN, "no immediate delivery: load average %.2f",
5494 (double)load_average/1000.0);
5498 /* Else do the delivery unless the ACL or local_scan() called for queue only
5499 or froze the message. Always deliver in a separate process. A fork failure is
5500 not a disaster, as the delivery will eventually happen on a subsequent queue
5501 run. The search cache must be tidied before the fork, as the parent will
5502 do it before exiting. The child will trigger a lookup failure and
5503 thereby defer the delivery if it tries to use (for example) a cached ldap
5504 connection that the parent has called unbind on. */
5506 else if (!queue_only_policy && !deliver_freeze)
5511 if ((pid = fork()) == 0)
5514 close_unwanted(); /* Close unwanted file descriptors and TLS */
5515 exim_nullstd(); /* Ensure std{in,out,err} exist */
5517 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5518 mode, deliver_drop_privilege is forced TRUE). */
5520 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5522 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5524 /* Control does not return here. */
5527 /* No need to re-exec */
5529 rc = deliver_message(message_id, FALSE, FALSE);
5531 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5532 EXIT_SUCCESS : EXIT_FAILURE);
5537 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5538 "process: %s", strerror(errno));
5541 /* In the parent, wait if synchronous delivery is required. This will
5542 always be the case in MUA wrapper mode. */
5544 else if (synchronous_delivery)
5547 while (wait(&status) != pid);
5548 if ((status & 0x00ff) != 0)
5549 log_write(0, LOG_MAIN|LOG_PANIC,
5550 "process %d crashed with signal %d while delivering %s",
5551 (int)pid, status & 0x00ff, message_id);
5552 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5556 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5557 automatically reaps children (see comments above the loop), clear away any
5558 finished subprocesses here, in case there are lots of messages coming in
5559 from the same source. */
5561 #ifndef SIG_IGN_WORKS
5562 while (waitpid(-1, NULL, WNOHANG) > 0);
5566 exim_exit(EXIT_SUCCESS); /* Never returns */
5567 return 0; /* To stop compiler warning */