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 (void)write(fd, process_info, process_info_len);
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); /* 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");
821 fprintf(f, "Lookups (built-in):");
822 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
823 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
825 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
828 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
829 fprintf(f, " dbm dbmjz dbmnz");
831 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
832 fprintf(f, " dnsdb");
834 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
835 fprintf(f, " dsearch");
837 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
838 fprintf(f, " ibase");
840 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
841 fprintf(f, " ldap ldapdn ldapm");
843 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
844 fprintf(f, " mysql");
846 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
847 fprintf(f, " nis nis0");
849 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
850 fprintf(f, " nisplus");
852 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
853 fprintf(f, " oracle");
855 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
856 fprintf(f, " passwd");
858 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
859 fprintf(f, " pgsql");
861 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
862 fprintf(f, " sqlite");
864 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
865 fprintf(f, " testdb");
867 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
868 fprintf(f, " whoson");
872 fprintf(f, "Authenticators:");
874 fprintf(f, " cram_md5");
876 #ifdef AUTH_CYRUS_SASL
877 fprintf(f, " cyrus_sasl");
880 fprintf(f, " dovecot");
883 fprintf(f, " gsasl");
885 #ifdef AUTH_HEIMDAL_GSSAPI
886 fprintf(f, " heimdal_gssapi");
888 #ifdef AUTH_PLAINTEXT
889 fprintf(f, " plaintext");
896 fprintf(f, "Routers:");
898 fprintf(f, " accept");
900 #ifdef ROUTER_DNSLOOKUP
901 fprintf(f, " dnslookup");
903 #ifdef ROUTER_IPLITERAL
904 fprintf(f, " ipliteral");
906 #ifdef ROUTER_IPLOOKUP
907 fprintf(f, " iplookup");
909 #ifdef ROUTER_MANUALROUTE
910 fprintf(f, " manualroute");
912 #ifdef ROUTER_QUERYPROGRAM
913 fprintf(f, " queryprogram");
915 #ifdef ROUTER_REDIRECT
916 fprintf(f, " redirect");
920 fprintf(f, "Transports:");
921 #ifdef TRANSPORT_APPENDFILE
922 fprintf(f, " appendfile");
923 #ifdef SUPPORT_MAILDIR
924 fprintf(f, "/maildir");
926 #ifdef SUPPORT_MAILSTORE
927 fprintf(f, "/mailstore");
933 #ifdef TRANSPORT_AUTOREPLY
934 fprintf(f, " autoreply");
936 #ifdef TRANSPORT_LMTP
939 #ifdef TRANSPORT_PIPE
942 #ifdef TRANSPORT_SMTP
947 if (fixed_never_users[0] > 0)
950 fprintf(f, "Fixed never_users: ");
951 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
952 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
953 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
956 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
958 /* Everything else is details which are only worth reporting when debugging.
959 Perhaps the tls_version_report should move into this too. */
964 /* clang defines __GNUC__ (at least, for me) so test for it first */
965 #if defined(__clang__)
966 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
967 #elif defined(__GNUC__)
968 fprintf(f, "Compiler: GCC [%s]\n",
972 "? unknown version ?"
976 fprintf(f, "Compiler: <unknown>\n");
980 tls_version_report(f);
983 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
984 if (authi->version_report) {
985 (*authi->version_report)(f);
989 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
990 characters; unless it's an ancient version of PCRE in which case it
992 #ifndef PCRE_PRERELEASE
993 #define PCRE_PRERELEASE
996 #define EXPAND_AND_QUOTE(X) QUOTE(X)
997 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
999 PCRE_MAJOR, PCRE_MINOR,
1000 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1003 #undef EXPAND_AND_QUOTE
1006 for (i = 0; i < lookup_list_count; i++)
1008 if (lookup_list[i]->version_report)
1009 lookup_list[i]->version_report(f);
1012 #ifdef WHITELIST_D_MACROS
1013 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1015 fprintf(f, "WHITELIST_D_MACROS unset\n");
1017 #ifdef TRUSTED_CONFIG_LIST
1018 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1020 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1027 /*************************************************
1028 * Show auxiliary information about Exim *
1029 *************************************************/
1032 show_exim_information(enum commandline_info request, FILE *stream)
1039 fprintf(stream, "Oops, something went wrong.\n");
1043 "The -bI: flag takes a string indicating which information to provide.\n"
1044 "If the string is not recognised, you'll get this help (on stderr).\n"
1046 " exim -bI:help this information\n"
1047 " exim -bI:dscp dscp value keywords known\n"
1048 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1052 for (pp = exim_sieve_extension_list; *pp; ++pp)
1053 fprintf(stream, "%s\n", *pp);
1056 dscp_list_to_stream(stream);
1062 /*************************************************
1063 * Quote a local part *
1064 *************************************************/
1066 /* This function is used when a sender address or a From: or Sender: header
1067 line is being created from the caller's login, or from an authenticated_id. It
1068 applies appropriate quoting rules for a local part.
1070 Argument: the local part
1071 Returns: the local part, quoted if necessary
1075 local_part_quote(uschar *lpart)
1077 BOOL needs_quote = FALSE;
1082 for (t = lpart; !needs_quote && *t != 0; t++)
1084 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1085 (*t != '.' || t == lpart || t[1] == 0);
1088 if (!needs_quote) return lpart;
1091 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1095 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1098 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1101 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1102 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1103 yield = string_cat(yield, &size, &ptr, nq, 1);
1107 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1115 /*************************************************
1116 * Load readline() functions *
1117 *************************************************/
1119 /* This function is called from testing executions that read data from stdin,
1120 but only when running as the calling user. Currently, only -be does this. The
1121 function loads the readline() function library and passes back the functions.
1122 On some systems, it needs the curses library, so load that too, but try without
1123 it if loading fails. All this functionality has to be requested at build time.
1126 fn_readline_ptr pointer to where to put the readline pointer
1127 fn_addhist_ptr pointer to where to put the addhistory function
1129 Returns: the dlopen handle or NULL on failure
1133 set_readline(char * (**fn_readline_ptr)(const char *),
1134 void (**fn_addhist_ptr)(const char *))
1137 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1139 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1140 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1142 if (dlhandle != NULL)
1144 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1145 * char * readline (const char *prompt);
1146 * void add_history (const char *string);
1148 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1149 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1153 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1162 /*************************************************
1163 * Get a line from stdin for testing things *
1164 *************************************************/
1166 /* This function is called when running tests that can take a number of lines
1167 of input (for example, -be and -bt). It handles continuations and trailing
1168 spaces. And prompting and a blank line output on eof. If readline() is in use,
1169 the arguments are non-NULL and provide the relevant functions.
1172 fn_readline readline function or NULL
1173 fn_addhist addhist function or NULL
1175 Returns: pointer to dynamic memory, or NULL at end of file
1179 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1184 uschar *yield = NULL;
1186 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1190 uschar buffer[1024];
1194 char *readline_line = NULL;
1195 if (fn_readline != NULL)
1197 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1198 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1199 p = US readline_line;
1204 /* readline() not in use */
1207 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1211 /* Handle the line */
1213 ss = p + (int)Ustrlen(p);
1214 while (ss > p && isspace(ss[-1])) ss--;
1218 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1221 yield = string_cat(yield, &size, &ptr, p, ss - p);
1224 if (fn_readline != NULL) free(readline_line);
1227 if (ss == p || yield[ptr-1] != '\\')
1235 if (yield == NULL) printf("\n");
1241 /*************************************************
1242 * Output usage information for the program *
1243 *************************************************/
1245 /* This function is called when there are no recipients
1246 or a specific --help argument was added.
1249 progname information on what name we were called by
1251 Returns: DOES NOT RETURN
1255 exim_usage(uschar *progname)
1258 /* Handle specific program invocation varients */
1259 if (Ustrcmp(progname, US"-mailq") == 0)
1262 "mailq - list the contents of the mail queue\n\n"
1263 "For a list of options, see the Exim documentation.\n");
1267 /* Generic usage - we output this whatever happens */
1269 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1270 "not directly from a shell command line. Options and/or arguments control\n"
1271 "what it does when called. For a list of options, see the Exim documentation.\n");
1278 /*************************************************
1279 * Validate that the macros given are okay *
1280 *************************************************/
1282 /* Typically, Exim will drop privileges if macros are supplied. In some
1283 cases, we want to not do so.
1285 Arguments: none (macros is a global)
1286 Returns: true if trusted, false otherwise
1290 macros_trusted(void)
1292 #ifdef WHITELIST_D_MACROS
1294 uschar *whitelisted, *end, *p, **whites, **w;
1295 int white_count, i, n;
1297 BOOL prev_char_item, found;
1302 #ifndef WHITELIST_D_MACROS
1306 /* We only trust -D overrides for some invoking users:
1307 root, the exim run-time user, the optional config owner user.
1308 I don't know why config-owner would be needed, but since they can own the
1309 config files anyway, there's no security risk to letting them override -D. */
1310 if ( ! ((real_uid == root_uid)
1311 || (real_uid == exim_uid)
1312 #ifdef CONFIGURE_OWNER
1313 || (real_uid == config_uid)
1317 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1321 /* Get a list of macros which are whitelisted */
1322 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1323 prev_char_item = FALSE;
1325 for (p = whitelisted; *p != '\0'; ++p)
1327 if (*p == ':' || isspace(*p))
1332 prev_char_item = FALSE;
1335 if (!prev_char_item)
1336 prev_char_item = TRUE;
1343 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1344 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1349 if (i == white_count)
1351 while (*p != '\0' && p < end)
1357 /* The list of macros should be very short. Accept the N*M complexity. */
1358 for (m = macros; m != NULL; m = m->next)
1361 for (w = whites; *w; ++w)
1362 if (Ustrcmp(*w, m->name) == 0)
1369 if (m->replacement == NULL)
1371 len = Ustrlen(m->replacement);
1374 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1375 0, PCRE_EOPT, NULL, 0);
1378 if (n != PCRE_ERROR_NOMATCH)
1379 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1383 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1389 /*************************************************
1390 * Entry point and high-level code *
1391 *************************************************/
1393 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1394 the appropriate action. All the necessary functions are present in the one
1395 binary. I originally thought one should split it up, but it turns out that so
1396 much of the apparatus is needed in each chunk that one might as well just have
1397 it all available all the time, which then makes the coding easier as well.
1400 argc count of entries in argv
1401 argv argument strings, with argv[0] being the program name
1403 Returns: EXIT_SUCCESS if terminated successfully
1404 EXIT_FAILURE otherwise, except when a message has been sent
1405 to the sender, and -oee was given
1409 main(int argc, char **cargv)
1411 uschar **argv = USS cargv;
1412 int arg_receive_timeout = -1;
1413 int arg_smtp_receive_timeout = -1;
1414 int arg_error_handling = error_handling;
1415 int filter_sfd = -1;
1416 int filter_ufd = -1;
1419 int list_queue_option = 0;
1421 int msg_action_arg = -1;
1422 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1423 int queue_only_reason = 0;
1425 int perl_start_option = 0;
1427 int recipients_arg = argc;
1428 int sender_address_domain = 0;
1429 int test_retry_arg = -1;
1430 int test_rewrite_arg = -1;
1431 BOOL arg_queue_only = FALSE;
1432 BOOL bi_option = FALSE;
1433 BOOL checking = FALSE;
1434 BOOL count_queue = FALSE;
1435 BOOL expansion_test = FALSE;
1436 BOOL extract_recipients = FALSE;
1437 BOOL flag_n = FALSE;
1438 BOOL forced_delivery = FALSE;
1439 BOOL f_end_dot = FALSE;
1440 BOOL deliver_give_up = FALSE;
1441 BOOL list_queue = FALSE;
1442 BOOL list_options = FALSE;
1443 BOOL local_queue_only;
1445 BOOL one_msg_action = FALSE;
1446 BOOL queue_only_set = FALSE;
1447 BOOL receiving_message = TRUE;
1448 BOOL sender_ident_set = FALSE;
1449 BOOL session_local_queue_only;
1451 BOOL removed_privilege = FALSE;
1452 BOOL usage_wanted = FALSE;
1453 BOOL verify_address_mode = FALSE;
1454 BOOL verify_as_sender = FALSE;
1455 BOOL version_printed = FALSE;
1456 uschar *alias_arg = NULL;
1457 uschar *called_as = US"";
1458 uschar *cmdline_syslog_name = NULL;
1459 uschar *start_queue_run_id = NULL;
1460 uschar *stop_queue_run_id = NULL;
1461 uschar *expansion_test_message = NULL;
1462 uschar *ftest_domain = NULL;
1463 uschar *ftest_localpart = NULL;
1464 uschar *ftest_prefix = NULL;
1465 uschar *ftest_suffix = NULL;
1466 uschar *malware_test_file = NULL;
1467 uschar *real_sender_address;
1468 uschar *originator_home = US"/";
1473 struct stat statbuf;
1474 pid_t passed_qr_pid = (pid_t)0;
1475 int passed_qr_pipe = -1;
1476 gid_t group_list[NGROUPS_MAX];
1478 /* For the -bI: flag */
1479 enum commandline_info info_flag = CMDINFO_NONE;
1480 BOOL info_stdout = FALSE;
1482 /* Possible options for -R and -S */
1484 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1486 /* Need to define this in case we need to change the environment in order
1487 to get rid of a bogus time zone. We have to make it char rather than uschar
1488 because some OS define it in /usr/include/unistd.h. */
1490 extern char **environ;
1492 /* If the Exim user and/or group and/or the configuration file owner/group were
1493 defined by ref:name at build time, we must now find the actual uid/gid values.
1494 This is a feature to make the lives of binary distributors easier. */
1496 #ifdef EXIM_USERNAME
1497 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1501 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1505 /* If ref:name uses a number as the name, route_finduser() returns
1506 TRUE with exim_uid set and pw coerced to NULL. */
1508 exim_gid = pw->pw_gid;
1509 #ifndef EXIM_GROUPNAME
1513 "exim: ref:name should specify a usercode, not a group.\n"
1514 "exim: can't let you get away with it unless you also specify a group.\n");
1521 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1527 #ifdef EXIM_GROUPNAME
1528 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1530 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1536 #ifdef CONFIGURE_OWNERNAME
1537 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1539 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1540 CONFIGURE_OWNERNAME);
1545 /* We default the system_filter_user to be the Exim run-time user, as a
1546 sane non-root value. */
1547 system_filter_uid = exim_uid;
1549 #ifdef CONFIGURE_GROUPNAME
1550 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1552 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1553 CONFIGURE_GROUPNAME);
1558 /* In the Cygwin environment, some initialization needs doing. It is fudged
1559 in by means of this macro. */
1565 /* Check a field which is patched when we are running Exim within its
1566 testing harness; do a fast initial check, and then the whole thing. */
1568 running_in_test_harness =
1569 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1571 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1572 at the start of a program; however, it seems that some environments do not
1573 follow this. A "strange" locale can affect the formatting of timestamps, so we
1576 setlocale(LC_ALL, "C");
1578 /* Set up the default handler for timing using alarm(). */
1580 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1582 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1583 because store_malloc writes a log entry on failure. */
1585 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1586 if (log_buffer == NULL)
1588 fprintf(stderr, "exim: failed to get store for log buffer\n");
1592 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1593 NULL when the daemon is run and the file is closed. We have to use this
1594 indirection, because some systems don't allow writing to the variable "stderr".
1597 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1599 /* Arrange for the PCRE regex library to use our store functions. Note that
1600 the normal calls are actually macros that add additional arguments for
1601 debugging purposes so we have to assign specially constructed functions here.
1602 The default is to use store in the stacking pool, but this is overridden in the
1603 regex_must_compile() function. */
1605 pcre_malloc = function_store_get;
1606 pcre_free = function_dummy_free;
1608 /* Ensure there is a big buffer for temporary use in several places. It is put
1609 in malloc store so that it can be freed for enlargement if necessary. */
1611 big_buffer = store_malloc(big_buffer_size);
1613 /* Set up the handler for the data request signal, and set the initial
1614 descriptive text. */
1616 set_process_info("initializing");
1617 os_restarting_signal(SIGUSR1, usr1_handler);
1619 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1620 in the daemon code. For the rest of Exim's uses, we ignore it. */
1622 signal(SIGHUP, SIG_IGN);
1624 /* We don't want to die on pipe errors as the code is written to handle
1625 the write error instead. */
1627 signal(SIGPIPE, SIG_IGN);
1629 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1630 set to SIG_IGN. This causes subprocesses that complete before the parent
1631 process waits for them not to hang around, so when Exim calls wait(), nothing
1632 is there. The wait() code has been made robust against this, but let's ensure
1633 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1634 ending status. We use sigaction rather than plain signal() on those OS where
1635 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1636 problem on AIX with this.) */
1640 struct sigaction act;
1641 act.sa_handler = SIG_DFL;
1642 sigemptyset(&(act.sa_mask));
1644 sigaction(SIGCHLD, &act, NULL);
1647 signal(SIGCHLD, SIG_DFL);
1650 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1655 /* Set up the version number. Set up the leading 'E' for the external form of
1656 message ids, set the pointer to the internal form, and initialize it to
1657 indicate no message being processed. */
1660 message_id_option[0] = '-';
1661 message_id_external = message_id_option + 1;
1662 message_id_external[0] = 'E';
1663 message_id = message_id_external + 1;
1666 /* Set the umask to zero so that any files Exim creates using open() are
1667 created with the modes that it specifies. NOTE: Files created with fopen() have
1668 a problem, which was not recognized till rather late (February 2006). With this
1669 umask, such files will be world writeable. (They are all content scanning files
1670 in the spool directory, which isn't world-accessible, so this is not a
1671 disaster, but it's untidy.) I don't want to change this overall setting,
1672 however, because it will interact badly with the open() calls. Instead, there's
1673 now a function called modefopen() that fiddles with the umask while calling
1678 /* Precompile the regular expression for matching a message id. Keep this in
1679 step with the code that generates ids in the accept.c module. We need to do
1680 this here, because the -M options check their arguments for syntactic validity
1681 using mac_ismsgid, which uses this. */
1684 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1686 /* Precompile the regular expression that is used for matching an SMTP error
1687 code, possibly extended, at the start of an error message. Note that the
1688 terminating whitespace character is included. */
1691 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1694 #ifdef WHITELIST_D_MACROS
1695 /* Precompile the regular expression used to filter the content of macros
1696 given to -D for permissibility. */
1698 regex_whitelisted_macro =
1699 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1703 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1704 this seems to be a generally accepted convention, since one finds symbolic
1705 links called "mailq" in standard OS configurations. */
1707 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1708 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1711 receiving_message = FALSE;
1712 called_as = US"-mailq";
1715 /* If the program is called as "rmail" treat it as equivalent to
1716 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1717 i.e. preventing a single dot on a line from terminating the message, and
1718 returning with zero return code, even in cases of error (provided an error
1719 message has been sent). */
1721 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1722 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1725 called_as = US"-rmail";
1726 errors_sender_rc = EXIT_SUCCESS;
1729 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1730 this is a smail convention. */
1732 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1733 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1735 smtp_input = smtp_batched_input = TRUE;
1736 called_as = US"-rsmtp";
1739 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1740 this is a smail convention. */
1742 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1743 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1746 receiving_message = FALSE;
1747 called_as = US"-runq";
1750 /* If the program is called as "newaliases" treat it as equivalent to
1751 "exim -bi"; this is a sendmail convention. */
1753 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1754 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1757 receiving_message = FALSE;
1758 called_as = US"-newaliases";
1761 /* Save the original effective uid for a couple of uses later. It should
1762 normally be root, but in some esoteric environments it may not be. */
1764 original_euid = geteuid();
1766 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1767 to be the same as the real ones. This makes a difference only if Exim is setuid
1768 (or setgid) to something other than root, which could be the case in some
1769 special configurations. */
1771 real_uid = getuid();
1772 real_gid = getgid();
1774 if (real_uid == root_uid)
1776 rv = setgid(real_gid);
1779 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1780 (long int)real_gid, strerror(errno));
1783 rv = setuid(real_uid);
1786 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1787 (long int)real_uid, strerror(errno));
1792 /* If neither the original real uid nor the original euid was root, Exim is
1793 running in an unprivileged state. */
1795 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1797 /* Scan the program's arguments. Some can be dealt with right away; others are
1798 simply recorded for checking and handling afterwards. Do a high-level switch
1799 on the second character (the one after '-'), to save some effort. */
1801 for (i = 1; i < argc; i++)
1803 BOOL badarg = FALSE;
1804 uschar *arg = argv[i];
1808 /* An argument not starting with '-' is the start of a recipients list;
1809 break out of the options-scanning loop. */
1817 /* An option consistion of -- terminates the options */
1819 if (Ustrcmp(arg, "--") == 0)
1821 recipients_arg = i + 1;
1825 /* Handle flagged options */
1827 switchchar = arg[1];
1830 /* Make all -ex options synonymous with -oex arguments, since that
1831 is assumed by various callers. Also make -qR options synonymous with -R
1832 options, as that seems to be required as well. Allow for -qqR too, and
1833 the same for -S options. */
1835 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1836 Ustrncmp(arg+1, "qR", 2) == 0 ||
1837 Ustrncmp(arg+1, "qS", 2) == 0)
1839 switchchar = arg[2];
1842 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1844 switchchar = arg[3];
1846 queue_2stage = TRUE;
1849 /* Make -r synonymous with -f, since it is a documented alias */
1851 else if (arg[1] == 'r') switchchar = 'f';
1853 /* Make -ov synonymous with -v */
1855 else if (Ustrcmp(arg, "-ov") == 0)
1861 /* deal with --option_aliases */
1862 else if (switchchar == '-')
1864 if (Ustrcmp(argrest, "help") == 0)
1866 usage_wanted = TRUE;
1869 else if (Ustrcmp(argrest, "version") == 0)
1876 /* High-level switch on active initial letter */
1881 /* sendmail uses -Ac and -Am to control which .cf file is used;
1884 if (*argrest == '\0') { badarg = TRUE; break; }
1887 BOOL ignore = FALSE;
1892 if (*(argrest + 1) == '\0')
1896 if (!ignore) { badarg = TRUE; break; }
1900 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1901 so has no need of it. */
1904 if (*argrest == 0) i++; /* Skip over the type */
1909 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1911 /* -bd: Run in daemon mode, awaiting SMTP connections.
1912 -bdf: Ditto, but in the foreground.
1915 if (*argrest == 'd')
1917 daemon_listen = TRUE;
1918 if (*(++argrest) == 'f') background_daemon = FALSE;
1919 else if (*argrest != 0) { badarg = TRUE; break; }
1922 /* -be: Run in expansion test mode
1923 -bem: Ditto, but read a message from a file first
1926 else if (*argrest == 'e')
1928 expansion_test = checking = TRUE;
1929 if (argrest[1] == 'm')
1931 if (++i >= argc) { badarg = TRUE; break; }
1932 expansion_test_message = argv[i];
1935 if (argrest[1] != 0) { badarg = TRUE; break; }
1938 /* -bF: Run system filter test */
1940 else if (*argrest == 'F')
1942 filter_test |= FTEST_SYSTEM;
1943 if (*(++argrest) != 0) { badarg = TRUE; break; }
1944 if (++i < argc) filter_test_sfile = argv[i]; else
1946 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1951 /* -bf: Run user filter test
1952 -bfd: Set domain for filter testing
1953 -bfl: Set local part for filter testing
1954 -bfp: Set prefix for filter testing
1955 -bfs: Set suffix for filter testing
1958 else if (*argrest == 'f')
1960 if (*(++argrest) == 0)
1962 filter_test |= FTEST_USER;
1963 if (++i < argc) filter_test_ufile = argv[i]; else
1965 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1973 fprintf(stderr, "exim: string expected after %s\n", arg);
1976 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1977 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1978 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1979 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1980 else { badarg = TRUE; break; }
1984 /* -bh: Host checking - an IP address must follow. */
1986 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1988 if (++i >= argc) { badarg = TRUE; break; }
1989 sender_host_address = argv[i];
1990 host_checking = checking = log_testing_mode = TRUE;
1991 host_checking_callout = argrest[1] == 'c';
1994 /* -bi: This option is used by sendmail to initialize *the* alias file,
1995 though it has the -oA option to specify a different file. Exim has no
1996 concept of *the* alias file, but since Sun's YP make script calls
1997 sendmail this way, some support must be provided. */
1999 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2001 /* -bI: provide information, of the type to follow after a colon.
2002 This is an Exim flag. */
2004 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2006 uschar *p = &argrest[2];
2007 info_flag = CMDINFO_HELP;
2010 if (strcmpic(p, CUS"sieve") == 0)
2012 info_flag = CMDINFO_SIEVE;
2015 else if (strcmpic(p, CUS"dscp") == 0)
2017 info_flag = CMDINFO_DSCP;
2020 else if (strcmpic(p, CUS"help") == 0)
2027 /* -bm: Accept and deliver message - the default option. Reinstate
2028 receiving_message, which got turned off for all -b options. */
2030 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2032 /* -bmalware: test the filename given for malware */
2034 else if (Ustrcmp(argrest, "malware") == 0)
2036 if (++i >= argc) { badarg = TRUE; break; }
2037 malware_test_file = argv[i];
2040 /* -bnq: For locally originating messages, do not qualify unqualified
2041 addresses. In the envelope, this causes errors; in header lines they
2044 else if (Ustrcmp(argrest, "nq") == 0)
2046 allow_unqualified_sender = FALSE;
2047 allow_unqualified_recipient = FALSE;
2050 /* -bpxx: List the contents of the mail queue, in various forms. If
2051 the option is -bpc, just a queue count is needed. Otherwise, if the
2052 first letter after p is r, then order is random. */
2054 else if (*argrest == 'p')
2056 if (*(++argrest) == 'c')
2059 if (*(++argrest) != 0) badarg = TRUE;
2063 if (*argrest == 'r')
2065 list_queue_option = 8;
2068 else list_queue_option = 0;
2072 /* -bp: List the contents of the mail queue, top-level only */
2074 if (*argrest == 0) {}
2076 /* -bpu: List the contents of the mail queue, top-level undelivered */
2078 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2080 /* -bpa: List the contents of the mail queue, including all delivered */
2082 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2084 /* Unknown after -bp[r] */
2094 /* -bP: List the configuration variables given as the address list.
2095 Force -v, so configuration errors get displayed. */
2097 else if (Ustrcmp(argrest, "P") == 0)
2099 list_options = TRUE;
2100 debug_selector |= D_v;
2101 debug_file = stderr;
2104 /* -brt: Test retry configuration lookup */
2106 else if (Ustrcmp(argrest, "rt") == 0)
2108 test_retry_arg = i + 1;
2112 /* -brw: Test rewrite configuration */
2114 else if (Ustrcmp(argrest, "rw") == 0)
2116 test_rewrite_arg = i + 1;
2120 /* -bS: Read SMTP commands on standard input, but produce no replies -
2121 all errors are reported by sending messages. */
2123 else if (Ustrcmp(argrest, "S") == 0)
2124 smtp_input = smtp_batched_input = receiving_message = TRUE;
2126 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2127 on standard output. */
2129 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2131 /* -bt: address testing mode */
2133 else if (Ustrcmp(argrest, "t") == 0)
2134 address_test_mode = checking = log_testing_mode = TRUE;
2136 /* -bv: verify addresses */
2138 else if (Ustrcmp(argrest, "v") == 0)
2139 verify_address_mode = checking = log_testing_mode = TRUE;
2141 /* -bvs: verify sender addresses */
2143 else if (Ustrcmp(argrest, "vs") == 0)
2145 verify_address_mode = checking = log_testing_mode = TRUE;
2146 verify_as_sender = TRUE;
2149 /* -bV: Print version string and support details */
2151 else if (Ustrcmp(argrest, "V") == 0)
2153 printf("Exim version %s #%s built %s\n", version_string,
2154 version_cnumber, version_date);
2155 printf("%s\n", CS version_copyright);
2156 version_printed = TRUE;
2157 show_whats_supported(stdout);
2160 /* -bw: inetd wait mode, accept a listening socket as stdin */
2162 else if (*argrest == 'w')
2164 inetd_wait_mode = TRUE;
2165 background_daemon = FALSE;
2166 daemon_listen = TRUE;
2167 if (*(++argrest) != '\0')
2169 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2170 if (inetd_wait_timeout <= 0)
2172 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2182 /* -C: change configuration file list; ignore if it isn't really
2183 a change! Enforce a prefix check if required. */
2188 if(++i < argc) argrest = argv[i]; else
2189 { badarg = TRUE; break; }
2191 if (Ustrcmp(config_main_filelist, argrest) != 0)
2193 #ifdef ALT_CONFIG_PREFIX
2195 int len = Ustrlen(ALT_CONFIG_PREFIX);
2196 uschar *list = argrest;
2198 while((filename = string_nextinlist(&list, &sep, big_buffer,
2199 big_buffer_size)) != NULL)
2201 if ((Ustrlen(filename) < len ||
2202 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2203 Ustrstr(filename, "/../") != NULL) &&
2204 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2206 fprintf(stderr, "-C Permission denied\n");
2211 if (real_uid != root_uid)
2213 #ifdef TRUSTED_CONFIG_LIST
2215 if (real_uid != exim_uid
2216 #ifdef CONFIGURE_OWNER
2217 && real_uid != config_uid
2220 trusted_config = FALSE;
2223 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2226 struct stat statbuf;
2228 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2229 (statbuf.st_uid != root_uid /* owner not root */
2230 #ifdef CONFIGURE_OWNER
2231 && statbuf.st_uid != config_uid /* owner not the special one */
2234 (statbuf.st_gid != root_gid /* group not root */
2235 #ifdef CONFIGURE_GROUP
2236 && statbuf.st_gid != config_gid /* group not the special one */
2238 && (statbuf.st_mode & 020) != 0 /* group writeable */
2240 (statbuf.st_mode & 2) != 0) /* world writeable */
2242 trusted_config = FALSE;
2247 /* Well, the trust list at least is up to scratch... */
2248 void *reset_point = store_get(0);
2249 uschar *trusted_configs[32];
2253 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2255 uschar *start = big_buffer, *nl;
2256 while (*start && isspace(*start))
2260 nl = Ustrchr(start, '\n');
2263 trusted_configs[nr_configs++] = string_copy(start);
2264 if (nr_configs == 32)
2272 uschar *list = argrest;
2274 while (trusted_config && (filename = string_nextinlist(&list,
2275 &sep, big_buffer, big_buffer_size)) != NULL)
2277 for (i=0; i < nr_configs; i++)
2279 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2282 if (i == nr_configs)
2284 trusted_config = FALSE;
2288 store_reset(reset_point);
2292 /* No valid prefixes found in trust_list file. */
2293 trusted_config = FALSE;
2299 /* Could not open trust_list file. */
2300 trusted_config = FALSE;
2304 /* Not root; don't trust config */
2305 trusted_config = FALSE;
2309 config_main_filelist = argrest;
2310 config_changed = TRUE;
2315 /* -D: set up a macro definition */
2318 #ifdef DISABLE_D_OPTION
2319 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2324 macro_item *mlast = NULL;
2327 uschar *s = argrest;
2329 while (isspace(*s)) s++;
2331 if (*s < 'A' || *s > 'Z')
2333 fprintf(stderr, "exim: macro name set by -D must start with "
2334 "an upper case letter\n");
2338 while (isalnum(*s) || *s == '_')
2340 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2344 if (ptr == 0) { badarg = TRUE; break; }
2345 while (isspace(*s)) s++;
2348 if (*s++ != '=') { badarg = TRUE; break; }
2349 while (isspace(*s)) s++;
2352 for (m = macros; m != NULL; m = m->next)
2354 if (Ustrcmp(m->name, name) == 0)
2356 fprintf(stderr, "exim: duplicated -D in command line\n");
2362 m = store_get(sizeof(macro_item) + Ustrlen(name));
2364 m->command_line = TRUE;
2365 if (mlast == NULL) macros = m; else mlast->next = m;
2366 Ustrcpy(m->name, name);
2367 m->replacement = string_copy(s);
2369 if (clmacro_count >= MAX_CLMACROS)
2371 fprintf(stderr, "exim: too many -D options on command line\n");
2374 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2380 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2381 The latter is now a no-op, retained for compatibility only. If -dd is used,
2382 debugging subprocesses of the daemon is disabled. */
2385 if (Ustrcmp(argrest, "ropcr") == 0)
2387 /* drop_cr = TRUE; */
2390 /* Use an intermediate variable so that we don't set debugging while
2391 decoding the debugging bits. */
2395 unsigned int selector = D_default;
2398 if (*argrest == 'd')
2400 debug_daemon = TRUE;
2404 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2405 debug_options_count, US"debug", 0);
2406 debug_selector = selector;
2411 /* -E: This is a local error message. This option is not intended for
2412 external use at all, but is not restricted to trusted callers because it
2413 does no harm (just suppresses certain error messages) and if Exim is run
2414 not setuid root it won't always be trusted when it generates error
2415 messages using this option. If there is a message id following -E, point
2416 message_reference at it, for logging. */
2419 local_error_message = TRUE;
2420 if (mac_ismsgid(argrest)) message_reference = argrest;
2424 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2425 option, so it looks as if historically the -oex options are also callable
2426 without the leading -o. So we have to accept them. Before the switch,
2427 anything starting -oe has been converted to -e. Exim does not support all
2428 of the sendmail error options. */
2431 if (Ustrcmp(argrest, "e") == 0)
2433 arg_error_handling = ERRORS_SENDER;
2434 errors_sender_rc = EXIT_SUCCESS;
2436 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2437 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2438 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2439 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2444 /* -F: Set sender's full name, used instead of the gecos entry from
2445 the password file. Since users can usually alter their gecos entries,
2446 there's no security involved in using this instead. The data can follow
2447 the -F or be in the next argument. */
2452 if(++i < argc) argrest = argv[i]; else
2453 { badarg = TRUE; break; }
2455 originator_name = argrest;
2456 sender_name_forced = TRUE;
2460 /* -f: Set sender's address - this value is only actually used if Exim is
2461 run by a trusted user, or if untrusted_set_sender is set and matches the
2462 address, except that the null address can always be set by any user. The
2463 test for this happens later, when the value given here is ignored when not
2464 permitted. For an untrusted user, the actual sender is still put in Sender:
2465 if it doesn't match the From: header (unless no_local_from_check is set).
2466 The data can follow the -f or be in the next argument. The -r switch is an
2467 obsolete form of -f but since there appear to be programs out there that
2468 use anything that sendmail has ever supported, better accept it - the
2469 synonymizing is done before the switch above.
2471 At this stage, we must allow domain literal addresses, because we don't
2472 know what the setting of allow_domain_literals is yet. Ditto for trailing
2473 dots and strip_trailing_dot. */
2481 if (i+1 < argc) argrest = argv[++i]; else
2482 { badarg = TRUE; break; }
2486 sender_address = string_sprintf(""); /* Ensure writeable memory */
2490 uschar *temp = argrest + Ustrlen(argrest) - 1;
2491 while (temp >= argrest && isspace(*temp)) temp--;
2492 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2493 allow_domain_literals = TRUE;
2494 strip_trailing_dot = TRUE;
2495 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2496 &sender_address_domain, TRUE);
2497 allow_domain_literals = FALSE;
2498 strip_trailing_dot = FALSE;
2499 if (sender_address == NULL)
2501 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2502 return EXIT_FAILURE;
2505 sender_address_forced = TRUE;
2509 /* -G: sendmail invocation to specify that it's a gateway submission and
2510 sendmail may complain about problems instead of fixing them. We might use
2511 it to disable submission mode fixups for command-line? Currently we just
2517 /* -h: Set the hop count for an incoming message. Exim does not currently
2518 support this; it always computes it by counting the Received: headers.
2519 To put it in will require a change to the spool header file format. */
2524 if(++i < argc) argrest = argv[i]; else
2525 { badarg = TRUE; break; }
2527 if (!isdigit(*argrest)) badarg = TRUE;
2531 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2532 not to be documented for sendmail but mailx (at least) uses it) */
2535 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2539 /* -L: set the identifier used for syslog; equivalent to setting
2540 syslog_processname in the config file, but needs to be an admin option. */
2543 if (*argrest == '\0')
2545 if(++i < argc) argrest = argv[i]; else
2546 { badarg = TRUE; break; }
2548 sz = Ustrlen(argrest);
2551 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2552 return EXIT_FAILURE;
2556 fprintf(stderr, "exim: the -L syslog name is too short\n");
2557 return EXIT_FAILURE;
2559 cmdline_syslog_name = argrest;
2563 receiving_message = FALSE;
2565 /* -MC: continue delivery of another message via an existing open
2566 file descriptor. This option is used for an internal call by the
2567 smtp transport when there is a pending message waiting to go to an
2568 address to which it has got a connection. Five subsequent arguments are
2569 required: transport name, host name, IP address, sequence number, and
2570 message_id. Transports may decline to create new processes if the sequence
2571 number gets too big. The channel is stdin. This (-MC) must be the last
2572 argument. There's a subsequent check that the real-uid is privileged.
2574 If we are running in the test harness. delay for a bit, to let the process
2575 that set this one up complete. This makes for repeatability of the logging,
2578 if (Ustrcmp(argrest, "C") == 0)
2580 union sockaddr_46 interface_sock;
2581 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2585 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2586 return EXIT_FAILURE;
2589 if (msg_action_arg >= 0)
2591 fprintf(stderr, "exim: incompatible arguments\n");
2592 return EXIT_FAILURE;
2595 continue_transport = argv[++i];
2596 continue_hostname = argv[++i];
2597 continue_host_address = argv[++i];
2598 continue_sequence = Uatoi(argv[++i]);
2599 msg_action = MSG_DELIVER;
2600 msg_action_arg = ++i;
2601 forced_delivery = TRUE;
2602 queue_run_pid = passed_qr_pid;
2603 queue_run_pipe = passed_qr_pipe;
2605 if (!mac_ismsgid(argv[i]))
2607 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2609 return EXIT_FAILURE;
2612 /* Set up $sending_ip_address and $sending_port */
2614 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2616 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2620 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2622 return EXIT_FAILURE;
2625 if (running_in_test_harness) millisleep(500);
2629 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2630 precedes -MC (see above). The flag indicates that the host to which
2631 Exim is connected has accepted an AUTH sequence. */
2633 else if (Ustrcmp(argrest, "CA") == 0)
2635 smtp_authenticated = TRUE;
2639 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2640 it preceded -MC (see above) */
2642 else if (Ustrcmp(argrest, "CP") == 0)
2644 smtp_use_pipelining = TRUE;
2648 /* -MCQ: pass on the pid of the queue-running process that started
2649 this chain of deliveries and the fd of its synchronizing pipe; this
2650 is useful only when it precedes -MC (see above) */
2652 else if (Ustrcmp(argrest, "CQ") == 0)
2654 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2656 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2661 /* -MCS: set the smtp_use_size flag; this is useful only when it
2662 precedes -MC (see above) */
2664 else if (Ustrcmp(argrest, "CS") == 0)
2666 smtp_use_size = TRUE;
2670 /* -MCT: set the tls_offered flag; this is useful only when it
2671 precedes -MC (see above). The flag indicates that the host to which
2672 Exim is connected has offered TLS support. */
2675 else if (Ustrcmp(argrest, "CT") == 0)
2682 /* -M[x]: various operations on the following list of message ids:
2683 -M deliver the messages, ignoring next retry times and thawing
2684 -Mc deliver the messages, checking next retry times, no thawing
2685 -Mf freeze the messages
2686 -Mg give up on the messages
2687 -Mt thaw the messages
2688 -Mrm remove the messages
2689 In the above cases, this must be the last option. There are also the
2690 following options which are followed by a single message id, and which
2691 act on that message. Some of them use the "recipient" addresses as well.
2692 -Mar add recipient(s)
2693 -Mmad mark all recipients delivered
2694 -Mmd mark recipients(s) delivered
2696 -Mset load a message for use with -be
2698 -Mvc show copy (of whole message, in RFC 2822 format)
2703 else if (*argrest == 0)
2705 msg_action = MSG_DELIVER;
2706 forced_delivery = deliver_force_thaw = TRUE;
2708 else if (Ustrcmp(argrest, "ar") == 0)
2710 msg_action = MSG_ADD_RECIPIENT;
2711 one_msg_action = TRUE;
2713 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2714 else if (Ustrcmp(argrest, "es") == 0)
2716 msg_action = MSG_EDIT_SENDER;
2717 one_msg_action = TRUE;
2719 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2720 else if (Ustrcmp(argrest, "g") == 0)
2722 msg_action = MSG_DELIVER;
2723 deliver_give_up = TRUE;
2725 else if (Ustrcmp(argrest, "mad") == 0)
2727 msg_action = MSG_MARK_ALL_DELIVERED;
2729 else if (Ustrcmp(argrest, "md") == 0)
2731 msg_action = MSG_MARK_DELIVERED;
2732 one_msg_action = TRUE;
2734 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2735 else if (Ustrcmp(argrest, "set") == 0)
2737 msg_action = MSG_LOAD;
2738 one_msg_action = TRUE;
2740 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2741 else if (Ustrcmp(argrest, "vb") == 0)
2743 msg_action = MSG_SHOW_BODY;
2744 one_msg_action = TRUE;
2746 else if (Ustrcmp(argrest, "vc") == 0)
2748 msg_action = MSG_SHOW_COPY;
2749 one_msg_action = TRUE;
2751 else if (Ustrcmp(argrest, "vh") == 0)
2753 msg_action = MSG_SHOW_HEADER;
2754 one_msg_action = TRUE;
2756 else if (Ustrcmp(argrest, "vl") == 0)
2758 msg_action = MSG_SHOW_LOG;
2759 one_msg_action = TRUE;
2761 else { badarg = TRUE; break; }
2763 /* All the -Mxx options require at least one message id. */
2765 msg_action_arg = i + 1;
2766 if (msg_action_arg >= argc)
2768 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2769 return EXIT_FAILURE;
2772 /* Some require only message ids to follow */
2774 if (!one_msg_action)
2777 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2779 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2781 return EXIT_FAILURE;
2783 goto END_ARG; /* Remaining args are ids */
2786 /* Others require only one message id, possibly followed by addresses,
2787 which will be handled as normal arguments. */
2791 if (!mac_ismsgid(argv[msg_action_arg]))
2793 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2794 argv[msg_action_arg], arg);
2795 return EXIT_FAILURE;
2802 /* Some programs seem to call the -om option without the leading o;
2803 for sendmail it askes for "me too". Exim always does this. */
2806 if (*argrest != 0) badarg = TRUE;
2810 /* -N: don't do delivery - a debugging option that stops transports doing
2811 their thing. It implies debugging at the D_v level. */
2816 dont_deliver = TRUE;
2817 debug_selector |= D_v;
2818 debug_file = stderr;
2824 /* -n: This means "don't alias" in sendmail, apparently.
2825 For normal invocations, it has no effect.
2826 It may affect some other options. */
2832 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2833 option to the specified value. This form uses long names. We need to handle
2834 -O option=value and -Ooption=value. */
2841 fprintf(stderr, "exim: string expected after -O\n");
2849 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2852 if (*argrest == 'A')
2854 alias_arg = argrest + 1;
2855 if (alias_arg[0] == 0)
2857 if (i+1 < argc) alias_arg = argv[++i]; else
2859 fprintf(stderr, "exim: string expected after -oA\n");
2865 /* -oB: Set a connection message max value for remote deliveries */
2867 else if (*argrest == 'B')
2869 uschar *p = argrest + 1;
2872 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2874 connection_max_messages = 1;
2883 fprintf(stderr, "exim: number expected after -oB\n");
2886 connection_max_messages = Uatoi(p);
2890 /* -odb: background delivery */
2892 else if (Ustrcmp(argrest, "db") == 0)
2894 synchronous_delivery = FALSE;
2895 arg_queue_only = FALSE;
2896 queue_only_set = TRUE;
2899 /* -odf: foreground delivery (smail-compatible option); same effect as
2900 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2903 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2905 synchronous_delivery = TRUE;
2906 arg_queue_only = FALSE;
2907 queue_only_set = TRUE;
2910 /* -odq: queue only */
2912 else if (Ustrcmp(argrest, "dq") == 0)
2914 synchronous_delivery = FALSE;
2915 arg_queue_only = TRUE;
2916 queue_only_set = TRUE;
2919 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2920 but no remote delivery */
2922 else if (Ustrcmp(argrest, "dqs") == 0)
2925 arg_queue_only = FALSE;
2926 queue_only_set = TRUE;
2929 /* -oex: Sendmail error flags. As these are also accepted without the
2930 leading -o prefix, for compatibility with vacation and other callers,
2931 they are handled with -e above. */
2933 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2934 -oitrue: Another sendmail syntax for the same */
2936 else if (Ustrcmp(argrest, "i") == 0 ||
2937 Ustrcmp(argrest, "itrue") == 0)
2940 /* -oM*: Set various characteristics for an incoming message; actually
2941 acted on for trusted callers only. */
2943 else if (*argrest == 'M')
2947 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2951 /* -oMa: Set sender host address */
2953 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2955 /* -oMaa: Set authenticator name */
2957 else if (Ustrcmp(argrest, "Maa") == 0)
2958 sender_host_authenticated = argv[++i];
2960 /* -oMas: setting authenticated sender */
2962 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2964 /* -oMai: setting authenticated id */
2966 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2968 /* -oMi: Set incoming interface address */
2970 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2972 /* -oMr: Received protocol */
2974 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2976 /* -oMs: Set sender host name */
2978 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2980 /* -oMt: Set sender ident */
2982 else if (Ustrcmp(argrest, "Mt") == 0)
2984 sender_ident_set = TRUE;
2985 sender_ident = argv[++i];
2988 /* Else a bad argument */
2997 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2998 seem to call this as -m (undocumented), so that is also accepted (see
3001 else if (Ustrcmp(argrest, "m") == 0) {}
3003 /* -oo: An ancient flag for old-style addresses which still seems to
3004 crop up in some calls (see in SCO). */
3006 else if (Ustrcmp(argrest, "o") == 0) {}
3008 /* -oP <name>: set pid file path for daemon */
3010 else if (Ustrcmp(argrest, "P") == 0)
3011 override_pid_file_path = argv[++i];
3013 /* -or <n>: set timeout for non-SMTP acceptance
3014 -os <n>: set timeout for SMTP acceptance */
3016 else if (*argrest == 'r' || *argrest == 's')
3018 int *tp = (*argrest == 'r')?
3019 &arg_receive_timeout : &arg_smtp_receive_timeout;
3020 if (argrest[1] == 0)
3022 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3024 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3027 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3032 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3034 else if (Ustrcmp(argrest, "X") == 0)
3035 override_local_interfaces = argv[++i];
3037 /* Unknown -o argument */
3043 /* -ps: force Perl startup; -pd force delayed Perl startup */
3047 if (*argrest == 's' && argrest[1] == 0)
3049 perl_start_option = 1;
3052 if (*argrest == 'd' && argrest[1] == 0)
3054 perl_start_option = -1;
3059 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3060 which sets the host protocol and host name */
3064 if (i+1 < argc) argrest = argv[++i]; else
3065 { badarg = TRUE; break; }
3070 uschar *hn = Ustrchr(argrest, ':');
3073 received_protocol = argrest;
3077 received_protocol = string_copyn(argrest, hn - argrest);
3078 sender_host_name = hn + 1;
3085 receiving_message = FALSE;
3086 if (queue_interval >= 0)
3088 fprintf(stderr, "exim: -q specified more than once\n");
3092 /* -qq...: Do queue runs in a 2-stage manner */
3094 if (*argrest == 'q')
3096 queue_2stage = TRUE;
3100 /* -qi...: Do only first (initial) deliveries */
3102 if (*argrest == 'i')
3104 queue_run_first_delivery = TRUE;
3108 /* -qf...: Run the queue, forcing deliveries
3109 -qff..: Ditto, forcing thawing as well */
3111 if (*argrest == 'f')
3113 queue_run_force = TRUE;
3114 if (*(++argrest) == 'f')
3116 deliver_force_thaw = TRUE;
3121 /* -q[f][f]l...: Run the queue only on local deliveries */
3123 if (*argrest == 'l')
3125 queue_run_local = TRUE;
3129 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3130 optionally starting from a given message id. */
3132 if (*argrest == 0 &&
3133 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3136 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3137 start_queue_run_id = argv[++i];
3138 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3139 stop_queue_run_id = argv[++i];
3142 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3143 optionally local only. */
3148 queue_interval = readconf_readtime(argrest, 0, FALSE);
3150 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3151 if (queue_interval <= 0)
3153 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3160 case 'R': /* Synonymous with -qR... */
3161 receiving_message = FALSE;
3163 /* -Rf: As -R (below) but force all deliveries,
3164 -Rff: Ditto, but also thaw all frozen messages,
3165 -Rr: String is regex
3166 -Rrf: Regex and force
3167 -Rrff: Regex and force and thaw
3169 in all cases provided there are no further characters in this
3175 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3177 if (Ustrcmp(argrest, rsopts[i]) == 0)
3179 if (i != 2) queue_run_force = TRUE;
3180 if (i >= 2) deliver_selectstring_regex = TRUE;
3181 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3182 argrest += Ustrlen(rsopts[i]);
3187 /* -R: Set string to match in addresses for forced queue run to
3188 pick out particular messages. */
3192 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3194 fprintf(stderr, "exim: string expected after -R\n");
3198 else deliver_selectstring = argrest;
3202 /* -r: an obsolete synonym for -f (see above) */
3205 /* -S: Like -R but works on sender. */
3207 case 'S': /* Synonymous with -qS... */
3208 receiving_message = FALSE;
3210 /* -Sf: As -S (below) but force all deliveries,
3211 -Sff: Ditto, but also thaw all frozen messages,
3212 -Sr: String is regex
3213 -Srf: Regex and force
3214 -Srff: Regex and force and thaw
3216 in all cases provided there are no further characters in this
3222 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3224 if (Ustrcmp(argrest, rsopts[i]) == 0)
3226 if (i != 2) queue_run_force = TRUE;
3227 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3228 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3229 argrest += Ustrlen(rsopts[i]);
3234 /* -S: Set string to match in addresses for forced queue run to
3235 pick out particular messages. */
3239 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3241 fprintf(stderr, "exim: string expected after -S\n");
3245 else deliver_selectstring_sender = argrest;
3248 /* -Tqt is an option that is exclusively for use by the testing suite.
3249 It is not recognized in other circumstances. It allows for the setting up
3250 of explicit "queue times" so that various warning/retry things can be
3251 tested. Otherwise variability of clock ticks etc. cause problems. */
3254 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3255 fudged_queue_times = argv[++i];
3260 /* -t: Set flag to extract recipients from body of message. */
3263 if (*argrest == 0) extract_recipients = TRUE;
3265 /* -ti: Set flag to extract recipients from body of message, and also
3266 specify that dot does not end the message. */
3268 else if (Ustrcmp(argrest, "i") == 0)
3270 extract_recipients = TRUE;
3274 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3277 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3284 /* -U: This means "initial user submission" in sendmail, apparently. The
3285 doc claims that in future sendmail may refuse syntactically invalid
3286 messages instead of fixing them. For the moment, we just ignore it. */
3292 /* -v: verify things - this is a very low-level debugging */
3297 debug_selector |= D_v;
3298 debug_file = stderr;
3304 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3306 The -x flag tells the sendmail command that mail from a local
3307 mail program has National Language Support (NLS) extended characters
3308 in the body of the mail item. The sendmail command can send mail with
3309 extended NLS characters across networks that normally corrupts these
3312 As Exim is 8-bit clean, it just ignores this flag. */
3315 if (*argrest != 0) badarg = TRUE;
3318 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3319 logs to that file. We swallow the parameter and otherwise ignore it. */
3322 if (*argrest == '\0')
3326 fprintf(stderr, "exim: string expected after -X\n");
3332 /* All other initial characters are errors */
3337 } /* End of high-level switch statement */
3339 /* Failed to recognize the option, or syntax error */
3343 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3344 "option %s\n", arg);
3350 /* If -R or -S have been specified without -q, assume a single queue run. */
3352 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3353 queue_interval < 0) queue_interval = 0;
3357 /* If usage_wanted is set we call the usage function - which never returns */
3358 if (usage_wanted) exim_usage(called_as);
3360 /* Arguments have been processed. Check for incompatibilities. */
3362 (smtp_input || extract_recipients || recipients_arg < argc) &&
3363 (daemon_listen || queue_interval >= 0 || bi_option ||
3364 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3365 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3368 msg_action_arg > 0 &&
3369 (daemon_listen || queue_interval >= 0 || list_options ||
3370 (checking && msg_action != MSG_LOAD) ||
3371 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3374 (daemon_listen || queue_interval >= 0) &&
3375 (sender_address != NULL || list_options || list_queue || checking ||
3379 daemon_listen && queue_interval == 0
3382 inetd_wait_mode && queue_interval >= 0
3386 (checking || smtp_input || extract_recipients ||
3387 filter_test != FTEST_NONE || bi_option)
3390 verify_address_mode &&
3391 (address_test_mode || smtp_input || extract_recipients ||
3392 filter_test != FTEST_NONE || bi_option)
3395 address_test_mode && (smtp_input || extract_recipients ||
3396 filter_test != FTEST_NONE || bi_option)
3399 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3403 deliver_selectstring != NULL && queue_interval < 0
3406 msg_action == MSG_LOAD &&
3407 (!expansion_test || expansion_test_message != NULL)
3411 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3415 /* If debugging is set up, set the file and the file descriptor to pass on to
3416 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3417 to run in the foreground. */
3419 if (debug_selector != 0)
3421 debug_file = stderr;
3422 debug_fd = fileno(debug_file);
3423 background_daemon = FALSE;
3424 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3425 if (debug_selector != D_v) /* -v only doesn't show this */
3427 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3428 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3430 if (!version_printed)
3431 show_whats_supported(stderr);
3435 /* When started with root privilege, ensure that the limits on the number of
3436 open files and the number of processes (where that is accessible) are
3437 sufficiently large, or are unset, in case Exim has been called from an
3438 environment where the limits are screwed down. Not all OS have the ability to
3439 change some of these limits. */
3443 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3449 #ifdef RLIMIT_NOFILE
3450 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3452 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3454 rlp.rlim_cur = rlp.rlim_max = 0;
3457 /* I originally chose 1000 as a nice big number that was unlikely to
3458 be exceeded. It turns out that some older OS have a fixed upper limit of
3461 if (rlp.rlim_cur < 1000)
3463 rlp.rlim_cur = rlp.rlim_max = 1000;
3464 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3466 rlp.rlim_cur = rlp.rlim_max = 256;
3467 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3468 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3475 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3477 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3479 rlp.rlim_cur = rlp.rlim_max = 0;
3482 #ifdef RLIM_INFINITY
3483 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3485 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3487 if (rlp.rlim_cur < 1000)
3489 rlp.rlim_cur = rlp.rlim_max = 1000;
3491 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3492 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3498 /* Exim is normally entered as root (but some special configurations are
3499 possible that don't do this). However, it always spins off sub-processes that
3500 set their uid and gid as required for local delivery. We don't want to pass on
3501 any extra groups that root may belong to, so we want to get rid of them all at
3504 We need to obey setgroups() at this stage, before possibly giving up root
3505 privilege for a changed configuration file, but later on we might need to
3506 check on the additional groups for the admin user privilege - can't do that
3507 till after reading the config, which might specify the exim gid. Therefore,
3508 save the group list here first. */
3510 group_count = getgroups(NGROUPS_MAX, group_list);
3511 if (group_count < 0)
3513 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3517 /* There is a fundamental difference in some BSD systems in the matter of
3518 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3519 known not to be different. On the "different" systems there is a single group
3520 list, and the first entry in it is the current group. On all other versions of
3521 Unix there is a supplementary group list, which is in *addition* to the current
3522 group. Consequently, to get rid of all extraneous groups on a "standard" system
3523 you pass over 0 groups to setgroups(), while on a "different" system you pass
3524 over a single group - the current group, which is always the first group in the
3525 list. Calling setgroups() with zero groups on a "different" system results in
3526 an error return. The following code should cope with both types of system.
3528 However, if this process isn't running as root, setgroups() can't be used
3529 since you have to be root to run it, even if throwing away groups. Not being
3530 root here happens only in some unusual configurations. We just ignore the
3533 if (setgroups(0, NULL) != 0)
3535 if (setgroups(1, group_list) != 0 && !unprivileged)
3537 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3542 /* If the configuration file name has been altered by an argument on the
3543 command line (either a new file name or a macro definition) and the caller is
3544 not root, or if this is a filter testing run, remove any setuid privilege the
3545 program has and run as the underlying user.
3547 The exim user is locked out of this, which severely restricts the use of -C
3550 Otherwise, set the real ids to the effective values (should be root unless run
3551 from inetd, which it can either be root or the exim uid, if one is configured).
3553 There is a private mechanism for bypassing some of this, in order to make it
3554 possible to test lots of configurations automatically, without having either to
3555 recompile each time, or to patch in an actual configuration file name and other
3556 values (such as the path name). If running in the test harness, pretend that
3557 configuration file changes and macro definitions haven't happened. */
3560 (!trusted_config || /* Config changed, or */
3561 !macros_trusted()) && /* impermissible macros and */
3562 real_uid != root_uid && /* Not root, and */
3563 !running_in_test_harness /* Not fudged */
3565 expansion_test /* expansion testing */
3567 filter_test != FTEST_NONE) /* Filter testing */
3569 setgroups(group_count, group_list);
3570 exim_setugid(real_uid, real_gid, FALSE,
3571 US"-C, -D, -be or -bf forces real uid");
3572 removed_privilege = TRUE;
3574 /* In the normal case when Exim is called like this, stderr is available
3575 and should be used for any logging information because attempts to write
3576 to the log will usually fail. To arrange this, we unset really_exim. However,
3577 if no stderr is available there is no point - we might as well have a go
3578 at the log (if it fails, syslog will be written).
3580 Note that if the invoker is Exim, the logs remain available. Messing with
3581 this causes unlogged successful deliveries. */
3583 if ((log_stderr != NULL) && (real_uid != exim_uid))
3584 really_exim = FALSE;
3587 /* Privilege is to be retained for the moment. It may be dropped later,
3588 depending on the job that this Exim process has been asked to do. For now, set
3589 the real uid to the effective so that subsequent re-execs of Exim are done by a
3592 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3594 /* If testing a filter, open the file(s) now, before wasting time doing other
3595 setups and reading the message. */
3597 if ((filter_test & FTEST_SYSTEM) != 0)
3599 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3602 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3604 return EXIT_FAILURE;
3608 if ((filter_test & FTEST_USER) != 0)
3610 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3613 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3615 return EXIT_FAILURE;
3619 /* Initialise lookup_list
3620 If debugging, already called above via version reporting.
3621 In either case, we initialise the list of available lookups while running
3622 as root. All dynamically modules are loaded from a directory which is
3623 hard-coded into the binary and is code which, if not a module, would be
3624 part of Exim already. Ability to modify the content of the directory
3625 is equivalent to the ability to modify a setuid binary!
3627 This needs to happen before we read the main configuration. */
3630 /* Read the main runtime configuration data; this gives up if there
3631 is a failure. It leaves the configuration file open so that the subsequent
3632 configuration data for delivery can be read if needed. */
3636 /* If an action on specific messages is requested, or if a daemon or queue
3637 runner is being started, we need to know if Exim was called by an admin user.
3638 This is the case if the real user is root or exim, or if the real group is
3639 exim, or if one of the supplementary groups is exim or a group listed in
3640 admin_groups. We don't fail all message actions immediately if not admin_user,
3641 since some actions can be performed by non-admin users. Instead, set admin_user
3642 for later interrogation. */
3644 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3649 for (i = 0; i < group_count; i++)
3651 if (group_list[i] == exim_gid) admin_user = TRUE;
3652 else if (admin_groups != NULL)
3654 for (j = 1; j <= (int)(admin_groups[0]); j++)
3655 if (admin_groups[j] == group_list[i])
3656 { admin_user = TRUE; break; }
3658 if (admin_user) break;
3662 /* Another group of privileged users are the trusted users. These are root,
3663 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3664 are permitted to specify sender_addresses with -f on the command line, and
3665 other message parameters as well. */
3667 if (real_uid == root_uid || real_uid == exim_uid)
3668 trusted_caller = TRUE;
3673 if (trusted_users != NULL)
3675 for (i = 1; i <= (int)(trusted_users[0]); i++)
3676 if (trusted_users[i] == real_uid)
3677 { trusted_caller = TRUE; break; }
3680 if (!trusted_caller && trusted_groups != NULL)
3682 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3684 if (trusted_groups[i] == real_gid)
3685 trusted_caller = TRUE;
3686 else for (j = 0; j < group_count; j++)
3688 if (trusted_groups[i] == group_list[j])
3689 { trusted_caller = TRUE; break; }
3691 if (trusted_caller) break;
3696 /* Handle the decoding of logging options. */
3698 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3699 log_selector_string, log_options, log_options_count, US"log", 0);
3703 debug_printf("configuration file is %s\n", config_main_filename);
3704 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3705 log_extra_selector);
3708 /* If domain literals are not allowed, check the sender address that was
3709 supplied with -f. Ditto for a stripped trailing dot. */
3711 if (sender_address != NULL)
3713 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3715 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3716 "allowed\n", sender_address);
3717 return EXIT_FAILURE;
3719 if (f_end_dot && !strip_trailing_dot)
3721 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3722 "(trailing dot not allowed)\n", sender_address);
3723 return EXIT_FAILURE;
3727 /* See if an admin user overrode our logging. */
3729 if (cmdline_syslog_name != NULL)
3733 syslog_processname = cmdline_syslog_name;
3734 log_file_path = string_copy(CUS"syslog");
3738 /* not a panic, non-privileged users should not be able to spam paniclog */
3740 "exim: you lack sufficient privilege to specify syslog process name\n");
3741 return EXIT_FAILURE;
3745 /* Paranoia check of maximum lengths of certain strings. There is a check
3746 on the length of the log file path in log.c, which will come into effect
3747 if there are any calls to write the log earlier than this. However, if we
3748 get this far but the string is very long, it is better to stop now than to
3749 carry on and (e.g.) receive a message and then have to collapse. The call to
3750 log_write() from here will cause the ultimate panic collapse if the complete
3751 file name exceeds the buffer length. */
3753 if (Ustrlen(log_file_path) > 200)
3754 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3755 "log_file_path is longer than 200 chars: aborting");
3757 if (Ustrlen(pid_file_path) > 200)
3758 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3759 "pid_file_path is longer than 200 chars: aborting");
3761 if (Ustrlen(spool_directory) > 200)
3762 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3763 "spool_directory is longer than 200 chars: aborting");
3765 /* Length check on the process name given to syslog for its TAG field,
3766 which is only permitted to be 32 characters or less. See RFC 3164. */
3768 if (Ustrlen(syslog_processname) > 32)
3769 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3770 "syslog_processname is longer than 32 chars: aborting");
3772 /* In some operating systems, the environment variable TMPDIR controls where
3773 temporary files are created; Exim doesn't use these (apart from when delivering
3774 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3775 If TMPDIR is found in the environment, reset it to the value defined in the
3776 TMPDIR macro, if this macro is defined. */
3781 for (p = USS environ; *p != NULL; p++)
3783 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3784 Ustrcmp(*p+7, TMPDIR) != 0)
3786 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3787 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3789 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3795 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3796 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3797 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3798 called by a user who has set the TZ variable. This then affects the timestamps
3799 in log files and in Received: headers, and any created Date: header lines. The
3800 required timezone is settable in the configuration file, so nothing can be done
3801 about this earlier - but hopefully nothing will normally be logged earlier than
3802 this. We have to make a new environment if TZ is wrong, but don't bother if
3803 timestamps_utc is set, because then all times are in UTC anyway. */
3805 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3807 timestamps_utc = TRUE;
3811 uschar *envtz = US getenv("TZ");
3812 if ((envtz == NULL && timezone_string != NULL) ||
3814 (timezone_string == NULL ||
3815 Ustrcmp(timezone_string, envtz) != 0)))
3817 uschar **p = USS environ;
3821 while (*p++ != NULL) count++;
3822 if (envtz == NULL) count++;
3823 newp = new = malloc(sizeof(uschar *) * (count + 1));
3824 for (p = USS environ; *p != NULL; p++)
3826 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3829 if (timezone_string != NULL)
3831 *newp = malloc(Ustrlen(timezone_string) + 4);
3832 sprintf(CS *newp++, "TZ=%s", timezone_string);
3837 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3838 tod_stamp(tod_log));
3842 /* Handle the case when we have removed the setuid privilege because of -C or
3843 -D. This means that the caller of Exim was not root.
3845 There is a problem if we were running as the Exim user. The sysadmin may
3846 expect this case to retain privilege because "the binary was called by the
3847 Exim user", but it hasn't, because either the -D option set macros, or the
3848 -C option set a non-trusted configuration file. There are two possibilities:
3850 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3851 to do message deliveries. Thus, the fact that it is running as a
3852 non-privileged user is plausible, and might be wanted in some special
3853 configurations. However, really_exim will have been set false when
3854 privilege was dropped, to stop Exim trying to write to its normal log
3855 files. Therefore, re-enable normal log processing, assuming the sysadmin
3856 has set up the log directory correctly.
3858 (2) If deliver_drop_privilege is not set, the configuration won't work as
3859 apparently intended, and so we log a panic message. In order to retain
3860 root for -C or -D, the caller must either be root or be invoking a
3861 trusted configuration file (when deliver_drop_privilege is false). */
3863 if (removed_privilege && (!trusted_config || macros != NULL) &&
3864 real_uid == exim_uid)
3866 if (deliver_drop_privilege)
3867 really_exim = TRUE; /* let logging work normally */
3869 log_write(0, LOG_MAIN|LOG_PANIC,
3870 "exim user lost privilege for using %s option",
3871 trusted_config? "-D" : "-C");
3874 /* Start up Perl interpreter if Perl support is configured and there is a
3875 perl_startup option, and the configuration or the command line specifies
3876 initializing starting. Note that the global variables are actually called
3877 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3880 if (perl_start_option != 0)
3881 opt_perl_at_start = (perl_start_option > 0);
3882 if (opt_perl_at_start && opt_perl_startup != NULL)
3885 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3886 errstr = init_perl(opt_perl_startup);
3889 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3890 return EXIT_FAILURE;
3892 opt_perl_started = TRUE;
3894 #endif /* EXIM_PERL */
3896 /* Log the arguments of the call if the configuration file said so. This is
3897 a debugging feature for finding out what arguments certain MUAs actually use.
3898 Don't attempt it if logging is disabled, or if listing variables or if
3899 verifying/testing addresses or expansions. */
3901 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3902 && really_exim && !list_options && !checking)
3905 uschar *p = big_buffer;
3907 (void)getcwd(CS p+4, big_buffer_size - 4);
3909 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3911 for (i = 0; i < argc; i++)
3913 int len = Ustrlen(argv[i]);
3916 if (p + len + 8 >= big_buffer + big_buffer_size)
3919 log_write(0, LOG_MAIN, "%s", big_buffer);
3920 Ustrcpy(big_buffer, "...");
3923 printing = string_printing(argv[i]);
3924 if (printing[0] == 0) quote = US"\""; else
3926 uschar *pp = printing;
3928 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3930 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3931 (p - big_buffer) - 4), printing, quote);
3935 if ((log_extra_selector & LX_arguments) != 0)
3936 log_write(0, LOG_MAIN, "%s", big_buffer);
3938 debug_printf("%s\n", big_buffer);
3941 /* Set the working directory to be the top-level spool directory. We don't rely
3942 on this in the code, which always uses fully qualified names, but it's useful
3943 for core dumps etc. Don't complain if it fails - the spool directory might not
3944 be generally accessible and calls with the -C option (and others) have lost
3945 privilege by now. Before the chdir, we try to ensure that the directory exists.
3948 if (Uchdir(spool_directory) != 0)
3950 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3951 (void)Uchdir(spool_directory);
3954 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3955 alias file. Exim doesn't have such a concept, but this call is screwed into
3956 Sun's YP makefiles. Handle this by calling a configured script, as the real
3957 user who called Exim. The -oA option can be used to pass an argument to the
3962 (void)fclose(config_file);
3963 if (bi_command != NULL)
3967 argv[i++] = bi_command;
3968 if (alias_arg != NULL) argv[i++] = alias_arg;
3971 setgroups(group_count, group_list);
3972 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3974 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3975 (argv[1] == NULL)? US"" : argv[1]);
3977 execv(CS argv[0], (char *const *)argv);
3978 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3983 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3988 /* We moved the admin/trusted check to be immediately after reading the
3989 configuration file. We leave these prints here to ensure that syslog setup,
3990 logfile setup, and so on has already happened. */
3992 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3993 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3995 /* Only an admin user may start the daemon or force a queue run in the default
3996 configuration, but the queue run restriction can be relaxed. Only an admin
3997 user may request that a message be returned to its sender forthwith. Only an
3998 admin user may specify a debug level greater than D_v (because it might show
3999 passwords, etc. in lookup queries). Only an admin user may request a queue
4000 count. Only an admin user can use the test interface to scan for email
4001 (because Exim will be in the spool dir and able to look at mails). */
4005 BOOL debugset = (debug_selector & ~D_v) != 0;
4006 if (deliver_give_up || daemon_listen || malware_test_file ||
4007 (count_queue && queue_list_requires_admin) ||
4008 (list_queue && queue_list_requires_admin) ||
4009 (queue_interval >= 0 && prod_requires_admin) ||
4010 (debugset && !running_in_test_harness))
4012 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4017 /* If the real user is not root or the exim uid, the argument for passing
4018 in an open TCP/IP connection for another message is not permitted, nor is
4019 running with the -N option for any delivery action, unless this call to exim is
4020 one that supplied an input message, or we are using a patched exim for
4021 regression testing. */
4023 if (real_uid != root_uid && real_uid != exim_uid &&
4024 (continue_hostname != NULL ||
4026 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4027 )) && !running_in_test_harness)
4029 fprintf(stderr, "exim: Permission denied\n");
4030 return EXIT_FAILURE;
4033 /* If the caller is not trusted, certain arguments are ignored when running for
4034 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4035 Note that authority for performing certain actions on messages is tested in the
4036 queue_action() function. */
4038 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4040 sender_host_name = sender_host_address = interface_address =
4041 sender_ident = received_protocol = NULL;
4042 sender_host_port = interface_port = 0;
4043 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4046 /* If a sender host address is set, extract the optional port number off the
4047 end of it and check its syntax. Do the same thing for the interface address.
4048 Exim exits if the syntax is bad. */
4052 if (sender_host_address != NULL)
4053 sender_host_port = check_port(sender_host_address);
4054 if (interface_address != NULL)
4055 interface_port = check_port(interface_address);
4058 /* If an SMTP message is being received check to see if the standard input is a
4059 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4060 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4065 union sockaddr_46 inetd_sock;
4066 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4067 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4069 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4070 if (family == AF_INET || family == AF_INET6)
4072 union sockaddr_46 interface_sock;
4073 size = sizeof(interface_sock);
4075 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4076 interface_address = host_ntoa(-1, &interface_sock, NULL,
4079 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
4081 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4084 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4085 NULL, &sender_host_port);
4086 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4087 "inetd is not supported when mua_wrapper is set");
4092 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4093 return EXIT_FAILURE;
4099 /* If the load average is going to be needed while receiving a message, get it
4100 now for those OS that require the first call to os_getloadavg() to be done as
4101 root. There will be further calls later for each message received. */
4103 #ifdef LOAD_AVG_NEEDS_ROOT
4104 if (receiving_message &&
4105 (queue_only_load >= 0 ||
4106 (is_inetd && smtp_load_reserve >= 0)
4109 load_average = OS_GETLOADAVG();
4113 /* The queue_only configuration option can be overridden by -odx on the command
4114 line, except that if queue_only_override is false, queue_only cannot be unset
4115 from the command line. */
4117 if (queue_only_set && (queue_only_override || arg_queue_only))
4118 queue_only = arg_queue_only;
4120 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4123 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4124 if (arg_smtp_receive_timeout >= 0)
4125 smtp_receive_timeout = arg_smtp_receive_timeout;
4127 /* If Exim was started with root privilege, unless we have already removed the
4128 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4129 except when starting the daemon or doing some kind of delivery or address
4130 testing (-bt). These are the only cases when root need to be retained. We run
4131 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4132 retained only for starting the daemon. We always do the initgroups() in this
4133 situation (controlled by the TRUE below), in order to be as close as possible
4134 to the state Exim usually runs in. */
4136 if (!unprivileged && /* originally had root AND */
4137 !removed_privilege && /* still got root AND */
4138 !daemon_listen && /* not starting the daemon */
4139 queue_interval <= 0 && /* (either kind of daemon) */
4141 deliver_drop_privilege || /* requested unprivileged */
4143 queue_interval < 0 && /* not running the queue */
4144 (msg_action_arg < 0 || /* and */
4145 msg_action != MSG_DELIVER) && /* not delivering and */
4146 (!checking || !address_test_mode) /* not address checking */
4150 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4153 /* When we are retaining a privileged uid, we still change to the exim gid. */
4158 rv = setgid(exim_gid);
4159 /* Impact of failure is that some stuff might end up with an incorrect group.
4160 We track this for failures from root, since any attempt to change privilege
4161 by root should succeed and failures should be examined. For non-root,
4162 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4163 no need to complain then. */
4166 if (!(unprivileged || removed_privilege))
4169 "exim: changing group failed: %s\n", strerror(errno));
4173 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4174 (long int)exim_gid, strerror(errno));
4178 /* Handle a request to scan a file for malware */
4179 if (malware_test_file)
4181 #ifdef WITH_CONTENT_SCAN
4183 set_process_info("scanning file for malware");
4184 result = malware_in_file(malware_test_file);
4187 printf("No malware found.\n");
4192 printf("Malware lookup returned non-okay/fail: %d\n", result);
4196 printf("Malware found: %s\n", malware_name);
4198 printf("Malware scan detected malware of unknown name.\n");
4200 printf("Malware scanning not enabled at compile time.\n");
4205 /* Handle a request to list the delivery queue */
4209 set_process_info("listing the queue");
4210 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4214 /* Handle a request to count the delivery queue */
4218 set_process_info("counting the queue");
4223 /* Handle actions on specific messages, except for the force delivery and
4224 message load actions, which are done below. Some actions take a whole list of
4225 message ids, which are known to continue up to the end of the arguments. Others
4226 take a single message id and then operate on the recipients list. */
4228 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4230 int yield = EXIT_SUCCESS;
4231 set_process_info("acting on specified messages");
4233 if (!one_msg_action)
4235 for (i = msg_action_arg; i < argc; i++)
4236 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4237 yield = EXIT_FAILURE;
4240 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4241 recipients_arg)) yield = EXIT_FAILURE;
4245 /* All the modes below here require the remaining configuration sections
4246 to be read, except that we can skip over the ACL setting when delivering
4247 specific messages, or doing a queue run. (For various testing cases we could
4248 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4251 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4253 /* The configuration data will have been read into POOL_PERM because we won't
4254 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4255 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4256 configuration were read into POOL_MAIN, because we don't do any resets till
4257 later on. However, it seems right, and it does ensure that both pools get used.
4260 store_pool = POOL_MAIN;
4262 /* Handle the -brt option. This is for checking out retry configurations.
4263 The next three arguments are a domain name or a complete address, and
4264 optionally two error numbers. All it does is to call the function that
4265 scans the retry configuration data. */
4267 if (test_retry_arg >= 0)
4269 retry_config *yield;
4270 int basic_errno = 0;
4274 if (test_retry_arg >= argc)
4276 printf("-brt needs a domain or address argument\n");
4277 exim_exit(EXIT_FAILURE);
4279 s1 = argv[test_retry_arg++];
4282 /* If the first argument contains no @ and no . it might be a local user
4283 or it might be a single-component name. Treat as a domain. */
4285 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4287 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4288 "being \ntreated as a one-component domain, not as a local part.\n\n",
4292 /* There may be an optional second domain arg. */
4294 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4295 s2 = argv[test_retry_arg++];
4297 /* The final arg is an error name */
4299 if (test_retry_arg < argc)
4301 uschar *ss = argv[test_retry_arg];
4303 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4306 printf("%s\n", CS error);
4307 return EXIT_FAILURE;
4310 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4311 code > 100 as an error is for matching codes to the decade. Turn them into
4312 a real error code, off the decade. */
4314 if (basic_errno == ERRNO_MAIL4XX ||
4315 basic_errno == ERRNO_RCPT4XX ||
4316 basic_errno == ERRNO_DATA4XX)
4318 int code = (more_errno >> 8) & 255;
4320 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4321 else if (code > 100)
4322 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4326 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4327 if (yield == NULL) printf("No retry information found\n"); else
4330 more_errno = yield->more_errno;
4331 printf("Retry rule: %s ", yield->pattern);
4333 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4335 printf("quota%s%s ",
4336 (more_errno > 0)? "_" : "",
4337 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4339 else if (yield->basic_errno == ECONNREFUSED)
4341 printf("refused%s%s ",
4342 (more_errno > 0)? "_" : "",
4343 (more_errno == 'M')? "MX" :
4344 (more_errno == 'A')? "A" : "");
4346 else if (yield->basic_errno == ETIMEDOUT)
4349 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4351 if (more_errno != 0) printf("_%s",
4352 (more_errno == 'M')? "MX" : "A");
4355 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4356 printf("auth_failed ");
4359 for (r = yield->rules; r != NULL; r = r->next)
4361 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4362 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4368 printf(",%d.", x/1000);
4382 exim_exit(EXIT_SUCCESS);
4385 /* Handle a request to list one or more configuration options */
4386 /* If -n was set, we suppress some information */
4390 set_process_info("listing variables");
4391 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4392 else for (i = recipients_arg; i < argc; i++)
4395 (Ustrcmp(argv[i], "router") == 0 ||
4396 Ustrcmp(argv[i], "transport") == 0 ||
4397 Ustrcmp(argv[i], "authenticator") == 0 ||
4398 Ustrcmp(argv[i], "macro") == 0))
4400 readconf_print(argv[i+1], argv[i], flag_n);
4403 else readconf_print(argv[i], NULL, flag_n);
4405 exim_exit(EXIT_SUCCESS);
4409 /* Handle a request to deliver one or more messages that are already on the
4410 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4411 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4413 Delivery of specific messages is typically used for a small number when
4414 prodding by hand (when the option forced_delivery will be set) or when
4415 re-execing to regain root privilege. Each message delivery must happen in a
4416 separate process, so we fork a process for each one, and run them sequentially
4417 so that debugging output doesn't get intertwined, and to avoid spawning too
4418 many processes if a long list is given. However, don't fork for the last one;
4419 this saves a process in the common case when Exim is called to deliver just one
4422 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4424 if (prod_requires_admin && !admin_user)
4426 fprintf(stderr, "exim: Permission denied\n");
4427 exim_exit(EXIT_FAILURE);
4429 set_process_info("delivering specified messages");
4430 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4431 for (i = msg_action_arg; i < argc; i++)
4436 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4437 else if ((pid = fork()) == 0)
4439 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4440 _exit(EXIT_SUCCESS);
4444 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4446 exim_exit(EXIT_FAILURE);
4450 exim_exit(EXIT_SUCCESS);
4454 /* If only a single queue run is requested, without SMTP listening, we can just
4455 turn into a queue runner, with an optional starting message id. */
4457 if (queue_interval == 0 && !daemon_listen)
4459 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4460 (start_queue_run_id == NULL)? US"" : US" starting at ",
4461 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4462 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4463 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4464 set_process_info("running the queue (single queue run)");
4465 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4466 exim_exit(EXIT_SUCCESS);
4470 /* Find the login name of the real user running this process. This is always
4471 needed when receiving a message, because it is written into the spool file. It
4472 may also be used to construct a from: or a sender: header, and in this case we
4473 need the user's full name as well, so save a copy of it, checked for RFC822
4474 syntax and munged if necessary, if it hasn't previously been set by the -F
4475 argument. We may try to get the passwd entry more than once, in case NIS or
4476 other delays are in evidence. Save the home directory for use in filter testing
4481 if ((pw = getpwuid(real_uid)) != NULL)
4483 originator_login = string_copy(US pw->pw_name);
4484 originator_home = string_copy(US pw->pw_dir);
4486 /* If user name has not been set by -F, set it from the passwd entry
4487 unless -f has been used to set the sender address by a trusted user. */
4489 if (originator_name == NULL)
4491 if (sender_address == NULL ||
4492 (!trusted_caller && filter_test == FTEST_NONE))
4494 uschar *name = US pw->pw_gecos;
4495 uschar *amp = Ustrchr(name, '&');
4498 /* Most Unix specify that a '&' character in the gecos field is
4499 replaced by a copy of the login name, and some even specify that
4500 the first character should be upper cased, so that's what we do. */
4505 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4506 amp - name, name, &loffset, originator_login, amp + 1);
4507 buffer[loffset] = toupper(buffer[loffset]);
4511 /* If a pattern for matching the gecos field was supplied, apply
4512 it and then expand the name string. */
4514 if (gecos_pattern != NULL && gecos_name != NULL)
4517 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4519 if (regex_match_and_setup(re, name, 0, -1))
4521 uschar *new_name = expand_string(gecos_name);
4523 if (new_name != NULL)
4525 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4526 "gecos field \"%s\"\n", new_name, name);
4529 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4530 "\"%s\": %s\n", gecos_name, expand_string_message);
4532 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4533 "gecos field \"%s\"\n", gecos_pattern, name);
4534 store_free((void *)re);
4536 originator_name = string_copy(name);
4539 /* A trusted caller has used -f but not -F */
4541 else originator_name = US"";
4544 /* Break the retry loop */
4549 if (++i > finduser_retries) break;
4553 /* If we cannot get a user login, log the incident and give up, unless the
4554 configuration specifies something to use. When running in the test harness,
4555 any setting of unknown_login overrides the actual name. */
4557 if (originator_login == NULL || running_in_test_harness)
4559 if (unknown_login != NULL)
4561 originator_login = expand_string(unknown_login);
4562 if (originator_name == NULL && unknown_username != NULL)
4563 originator_name = expand_string(unknown_username);
4564 if (originator_name == NULL) originator_name = US"";
4566 if (originator_login == NULL)
4567 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4571 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4574 originator_name = string_copy(parse_fix_phrase(originator_name,
4575 Ustrlen(originator_name), big_buffer, big_buffer_size));
4577 /* If a message is created by this call of Exim, the uid/gid of its originator
4578 are those of the caller. These values are overridden if an existing message is
4579 read in from the spool. */
4581 originator_uid = real_uid;
4582 originator_gid = real_gid;
4584 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4585 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4587 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4588 returns. We leave this till here so that the originator_ fields are available
4589 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4592 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4596 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4597 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4598 "mua_wrapper is set");
4603 /* If the sender ident has not been set (by a trusted caller) set it to
4604 the caller. This will get overwritten below for an inetd call. If a trusted
4605 caller has set it empty, unset it. */
4607 if (sender_ident == NULL) sender_ident = originator_login;
4608 else if (sender_ident[0] == 0) sender_ident = NULL;
4610 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4611 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4612 originator_* variables set. */
4614 if (test_rewrite_arg >= 0)
4616 really_exim = FALSE;
4617 if (test_rewrite_arg >= argc)
4619 printf("-brw needs an address argument\n");
4620 exim_exit(EXIT_FAILURE);
4622 rewrite_test(argv[test_rewrite_arg]);
4623 exim_exit(EXIT_SUCCESS);
4626 /* A locally-supplied message is considered to be coming from a local user
4627 unless a trusted caller supplies a sender address with -f, or is passing in the
4628 message via SMTP (inetd invocation or otherwise). */
4630 if ((sender_address == NULL && !smtp_input) ||
4631 (!trusted_caller && filter_test == FTEST_NONE))
4633 sender_local = TRUE;
4635 /* A trusted caller can supply authenticated_sender and authenticated_id
4636 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4637 defaults except when host checking. */
4639 if (authenticated_sender == NULL && !host_checking)
4640 authenticated_sender = string_sprintf("%s@%s", originator_login,
4641 qualify_domain_sender);
4642 if (authenticated_id == NULL && !host_checking)
4643 authenticated_id = originator_login;
4646 /* Trusted callers are always permitted to specify the sender address.
4647 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4648 is specified is the empty address. However, if a trusted caller does not
4649 specify a sender address for SMTP input, we leave sender_address unset. This
4650 causes the MAIL commands to be honoured. */
4652 if ((!smtp_input && sender_address == NULL) ||
4653 !receive_check_set_sender(sender_address))
4655 /* Either the caller is not permitted to set a general sender, or this is
4656 non-SMTP input and the trusted caller has not set a sender. If there is no
4657 sender, or if a sender other than <> is set, override with the originator's
4658 login (which will get qualified below), except when checking things. */
4660 if (sender_address == NULL /* No sender_address set */
4662 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4663 !checking && /* Not running tests, AND */
4664 filter_test == FTEST_NONE)) /* Not testing a filter */
4666 sender_address = originator_login;
4667 sender_address_forced = FALSE;
4668 sender_address_domain = 0;
4672 /* Remember whether an untrusted caller set the sender address */
4674 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4676 /* Ensure that the sender address is fully qualified unless it is the empty
4677 address, which indicates an error message, or doesn't exist (root caller, smtp
4678 interface, no -f argument). */
4680 if (sender_address != NULL && sender_address[0] != 0 &&
4681 sender_address_domain == 0)
4682 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4683 qualify_domain_sender);
4685 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4687 /* Handle a request to verify a list of addresses, or test them for delivery.
4688 This must follow the setting of the sender address, since routers can be
4689 predicated upon the sender. If no arguments are given, read addresses from
4690 stdin. Set debug_level to at least D_v to get full output for address testing.
4693 if (verify_address_mode || address_test_mode)
4696 int flags = vopt_qualify;
4698 if (verify_address_mode)
4700 if (!verify_as_sender) flags |= vopt_is_recipient;
4701 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4706 flags |= vopt_is_recipient;
4707 debug_selector |= D_v;
4708 debug_file = stderr;
4709 debug_fd = fileno(debug_file);
4710 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4713 if (recipients_arg < argc)
4715 while (recipients_arg < argc)
4717 uschar *s = argv[recipients_arg++];
4720 BOOL finished = FALSE;
4721 uschar *ss = parse_find_address_end(s, FALSE);
4722 if (*ss == ',') *ss = 0; else finished = TRUE;
4723 test_address(s, flags, &exit_value);
4726 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4733 uschar *s = get_stdinput(NULL, NULL);
4734 if (s == NULL) break;
4735 test_address(s, flags, &exit_value);
4739 exim_exit(exit_value);
4742 /* Handle expansion checking. Either expand items on the command line, or read
4743 from stdin if there aren't any. If -Mset was specified, load the message so
4744 that its variables can be used, but restrict this facility to admin users.
4745 Otherwise, if -bem was used, read a message from stdin. */
4749 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4751 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4754 fprintf(stderr, "exim: permission denied\n");
4757 message_id = argv[msg_action_arg];
4758 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4759 if (!spool_open_datafile(message_id))
4760 printf ("Failed to load message datafile %s\n", message_id);
4761 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4762 printf ("Failed to load message %s\n", message_id);
4765 /* Read a test message from a file. We fudge it up to be on stdin, saving
4766 stdin itself for later reading of expansion strings. */
4768 else if (expansion_test_message != NULL)
4770 int save_stdin = dup(0);
4771 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4774 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4776 return EXIT_FAILURE;
4779 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4780 message_ended = END_NOTENDED;
4781 read_message_body(receive_msg(extract_recipients));
4782 message_linecount += body_linecount;
4783 (void)dup2(save_stdin, 0);
4784 (void)close(save_stdin);
4785 clearerr(stdin); /* Required by Darwin */
4788 /* Allow $recipients for this testing */
4790 enable_dollar_recipients = TRUE;
4792 /* Expand command line items */
4794 if (recipients_arg < argc)
4796 while (recipients_arg < argc)
4798 uschar *s = argv[recipients_arg++];
4799 uschar *ss = expand_string(s);
4800 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4801 else printf("%s\n", CS ss);
4809 char *(*fn_readline)(const char *) = NULL;
4810 void (*fn_addhist)(const char *) = NULL;
4813 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4819 uschar *source = get_stdinput(fn_readline, fn_addhist);
4820 if (source == NULL) break;
4821 ss = expand_string(source);
4823 printf ("Failed: %s\n", expand_string_message);
4824 else printf("%s\n", CS ss);
4828 if (dlhandle != NULL) dlclose(dlhandle);
4832 /* The data file will be open after -Mset */
4834 if (deliver_datafile >= 0)
4836 (void)close(deliver_datafile);
4837 deliver_datafile = -1;
4840 exim_exit(EXIT_SUCCESS);
4844 /* The active host name is normally the primary host name, but it can be varied
4845 for hosts that want to play several parts at once. We need to ensure that it is
4846 set for host checking, and for receiving messages. */
4848 smtp_active_hostname = primary_hostname;
4849 if (raw_active_hostname != NULL)
4851 uschar *nah = expand_string(raw_active_hostname);
4854 if (!expand_string_forcedfail)
4855 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4856 "(smtp_active_hostname): %s", raw_active_hostname,
4857 expand_string_message);
4859 else if (nah[0] != 0) smtp_active_hostname = nah;
4862 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4863 given IP address so that the blocking and relay configuration can be tested.
4864 Unless a sender_ident was set by -oMt, we discard it (the default is the
4865 caller's login name). An RFC 1413 call is made only if we are running in the
4866 test harness and an incoming interface and both ports are specified, because
4867 there is no TCP/IP call to find the ident for. */
4874 if (!sender_ident_set)
4876 sender_ident = NULL;
4877 if (running_in_test_harness && sender_host_port != 0 &&
4878 interface_address != NULL && interface_port != 0)
4879 verify_get_ident(1413);
4882 /* In case the given address is a non-canonical IPv6 address, canonicize
4883 it. The code works for both IPv4 and IPv6, as it happens. */
4885 size = host_aton(sender_host_address, x);
4886 sender_host_address = store_get(48); /* large enough for full IPv6 */
4887 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4889 /* Now set up for testing */
4891 host_build_sender_fullhost();
4895 sender_local = FALSE;
4896 sender_host_notsocket = TRUE;
4897 debug_file = stderr;
4898 debug_fd = fileno(debug_file);
4899 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4900 "**** but without any ident (RFC 1413) callback.\n"
4901 "**** This is not for real!\n\n",
4902 sender_host_address);
4904 if (verify_check_host(&hosts_connection_nolog) == OK)
4905 log_write_selector &= ~L_smtp_connection;
4906 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4908 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4909 because a log line has already been written for all its failure exists
4910 (usually "connection refused: <reason>") and writing another one is
4911 unnecessary clutter. */
4913 if (smtp_start_session())
4915 reset_point = store_get(0);
4918 store_reset(reset_point);
4919 if (smtp_setup_msg() <= 0) break;
4920 if (!receive_msg(FALSE)) break;
4924 exim_exit(EXIT_SUCCESS);
4928 /* Arrange for message reception if recipients or SMTP were specified;
4929 otherwise complain unless a version print (-bV) happened or this is a filter
4930 verification test or info dump.
4931 In the former case, show the configuration file name. */
4933 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4935 if (version_printed)
4937 printf("Configuration file is %s\n", config_main_filename);
4938 return EXIT_SUCCESS;
4941 if (info_flag != CMDINFO_NONE)
4943 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4944 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4947 if (filter_test == FTEST_NONE)
4948 exim_usage(called_as);
4952 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4953 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4954 that we are not called from inetd, because that is rejected above. The
4955 following configuration settings are forced here:
4957 (1) Synchronous delivery (-odi)
4958 (2) Errors to stderr (-oep == -oeq)
4959 (3) No parallel remote delivery
4960 (4) Unprivileged delivery
4962 We don't force overall queueing options because there are several of them;
4963 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4964 to override any SMTP queueing. */
4968 synchronous_delivery = TRUE;
4969 arg_error_handling = ERRORS_STDERR;
4970 remote_max_parallel = 1;
4971 deliver_drop_privilege = TRUE;
4973 queue_smtp_domains = NULL;
4977 /* Prepare to accept one or more new messages on the standard input. When a
4978 message has been read, its id is returned in message_id[]. If doing immediate
4979 delivery, we fork a delivery process for each received message, except for the
4980 last one, where we can save a process switch.
4982 It is only in non-smtp mode that error_handling is allowed to be changed from
4983 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4984 sendmail error modes other than -oem ever actually used? Later: yes.) */
4986 if (!smtp_input) error_handling = arg_error_handling;
4988 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4989 logging being sent down the socket and make an identd call to get the
4994 (void)fclose(stderr);
4995 exim_nullstd(); /* Re-open to /dev/null */
4996 verify_get_ident(IDENT_PORT);
4997 host_build_sender_fullhost();
4998 set_process_info("handling incoming connection from %s via inetd",
5002 /* If the sender host address has been set, build sender_fullhost if it hasn't
5003 already been done (which it will have been for inetd). This caters for the
5004 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5005 so that the test for IP options is skipped for -bs input. */
5007 if (sender_host_address != NULL && sender_fullhost == NULL)
5009 host_build_sender_fullhost();
5010 set_process_info("handling incoming connection from %s via -oMa",
5012 sender_host_notsocket = TRUE;
5015 /* Otherwise, set the sender host as unknown except for inetd calls. This
5016 prevents host checking in the case of -bs not from inetd and also for -bS. */
5018 else if (!is_inetd) sender_host_unknown = TRUE;
5020 /* If stdout does not exist, then dup stdin to stdout. This can happen
5021 if exim is started from inetd. In this case fd 0 will be set to the socket,
5022 but fd 1 will not be set. This also happens for passed SMTP channels. */
5024 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5026 /* Set up the incoming protocol name and the state of the program. Root is
5027 allowed to force received protocol via the -oMr option above. If we have come
5028 via inetd, the process info has already been set up. We don't set
5029 received_protocol here for smtp input, as it varies according to
5030 batch/HELO/EHLO/AUTH/TLS. */
5034 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5035 smtp_batched_input? "batched " : "",
5036 (sender_address!= NULL)? sender_address : originator_login);
5040 if (received_protocol == NULL)
5041 received_protocol = string_sprintf("local%s", called_as);
5042 set_process_info("accepting a local non-SMTP message from <%s>",
5046 /* Initialize the session_local_queue-only flag (this will be ignored if
5047 mua_wrapper is set) */
5050 session_local_queue_only = queue_only;
5052 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5053 the spool if so configured. On failure, we must not attempt to send an error
5054 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5055 error code is given.) */
5057 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5059 fprintf(stderr, "exim: insufficient disk space\n");
5060 return EXIT_FAILURE;
5063 /* If this is smtp input of any kind, real or batched, handle the start of the
5066 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5067 because a log line has already been written for all its failure exists
5068 (usually "connection refused: <reason>") and writing another one is
5069 unnecessary clutter. */
5075 if (verify_check_host(&hosts_connection_nolog) == OK)
5076 log_write_selector &= ~L_smtp_connection;
5077 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5078 if (!smtp_start_session())
5081 exim_exit(EXIT_SUCCESS);
5085 /* Otherwise, set up the input size limit here. */
5089 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5090 if (expand_string_message != NULL)
5092 if (thismessage_size_limit == -1)
5093 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5094 "message_size_limit: %s", expand_string_message);
5096 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5097 "message_size_limit: %s", expand_string_message);
5101 /* Loop for several messages when reading SMTP input. If we fork any child
5102 processes, we don't want to wait for them unless synchronous delivery is
5103 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5104 same as SIG_DFL, despite the fact that documentation often lists the default as
5105 "ignore". This is a confusing area. This is what I know:
5107 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5108 processes that complete simply to go away without ever becoming defunct. You
5109 can't then wait for them - but we don't want to wait for them in the
5110 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5111 happen for all OS (e.g. *BSD is different).
5113 But that's not the end of the story. Some (many? all?) systems have the
5114 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5115 has by default, so it seems that the difference is merely one of default
5116 (compare restarting vs non-restarting signals).
5118 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5119 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5120 of the loop below. Paranoia rules.
5122 February 2003: That's *still* not the end of the story. There are now versions
5123 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5124 process then calls waitpid(), a grumble is written to the system log, because
5125 this is logically inconsistent. In other words, it doesn't like the paranoia.
5126 As a consequenc of this, the waitpid() below is now excluded if we are sure
5127 that SIG_IGN works. */
5129 if (!synchronous_delivery)
5132 struct sigaction act;
5133 act.sa_handler = SIG_IGN;
5134 sigemptyset(&(act.sa_mask));
5135 act.sa_flags = SA_NOCLDWAIT;
5136 sigaction(SIGCHLD, &act, NULL);
5138 signal(SIGCHLD, SIG_IGN);
5142 /* Save the current store pool point, for resetting at the start of
5143 each message, and save the real sender address, if any. */
5145 reset_point = store_get(0);
5146 real_sender_address = sender_address;
5148 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5149 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5154 store_reset(reset_point);
5157 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5158 input and build the recipients list, before calling receive_msg() to read the
5159 message proper. Whatever sender address is given in the SMTP transaction is
5160 often ignored for local senders - we use the actual sender, which is normally
5161 either the underlying user running this process or a -f argument provided by
5162 a trusted caller. It is saved in real_sender_address. The test for whether to
5163 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5168 if ((rc = smtp_setup_msg()) > 0)
5170 if (real_sender_address != NULL &&
5171 !receive_check_set_sender(sender_address))
5173 sender_address = raw_sender = real_sender_address;
5174 sender_address_unrewritten = NULL;
5177 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5178 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5179 the very end. The result of the ACL is ignored (as for other non-SMTP
5180 messages). It is run for its potential side effects. */
5182 if (smtp_batched_input && acl_not_smtp_start != NULL)
5184 uschar *user_msg, *log_msg;
5185 enable_dollar_recipients = TRUE;
5186 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5187 &user_msg, &log_msg);
5188 enable_dollar_recipients = FALSE;
5191 /* Now get the data for the message */
5193 more = receive_msg(extract_recipients);
5194 if (message_id[0] == 0)
5197 smtp_log_no_mail(); /* Log no mail if configured */
5198 exim_exit(EXIT_FAILURE);
5203 smtp_log_no_mail(); /* Log no mail if configured */
5204 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5208 /* In the non-SMTP case, we have all the information from the command
5209 line, but must process it in case it is in the more general RFC822
5210 format, and in any case, to detect syntax errors. Also, it appears that
5211 the use of comma-separated lists as single arguments is common, so we
5212 had better support them. */
5218 int count = argc - recipients_arg;
5219 uschar **list = argv + recipients_arg;
5221 /* These options cannot be changed dynamically for non-SMTP messages */
5223 active_local_sender_retain = local_sender_retain;
5224 active_local_from_check = local_from_check;
5226 /* Save before any rewriting */
5228 raw_sender = string_copy(sender_address);
5230 /* Loop for each argument */
5232 for (i = 0; i < count; i++)
5234 int start, end, domain;
5236 uschar *s = list[i];
5238 /* Loop for each comma-separated address */
5242 BOOL finished = FALSE;
5244 uschar *ss = parse_find_address_end(s, FALSE);
5246 if (*ss == ',') *ss = 0; else finished = TRUE;
5248 /* Check max recipients - if -t was used, these aren't recipients */
5250 if (recipients_max > 0 && ++rcount > recipients_max &&
5251 !extract_recipients)
5253 if (error_handling == ERRORS_STDERR)
5255 fprintf(stderr, "exim: too many recipients\n");
5256 exim_exit(EXIT_FAILURE);
5261 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5262 errors_sender_rc : EXIT_FAILURE;
5267 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5269 if (domain == 0 && !allow_unqualified_recipient)
5272 errmess = US"unqualified recipient address not allowed";
5275 if (recipient == NULL)
5277 if (error_handling == ERRORS_STDERR)
5279 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5280 string_printing(list[i]), errmess);
5281 exim_exit(EXIT_FAILURE);
5287 eblock.text1 = string_printing(list[i]);
5288 eblock.text2 = errmess;
5290 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5291 errors_sender_rc : EXIT_FAILURE;
5295 receive_add_recipient(recipient, -1);
5298 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5302 /* Show the recipients when debugging */
5307 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5308 if (recipients_list != NULL)
5310 debug_printf("Recipients:\n");
5311 for (i = 0; i < recipients_count; i++)
5312 debug_printf(" %s\n", recipients_list[i].address);
5316 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5317 ignored; rejecting here would just add complication, and it can just as
5318 well be done later. Allow $recipients to be visible in the ACL. */
5320 if (acl_not_smtp_start != NULL)
5322 uschar *user_msg, *log_msg;
5323 enable_dollar_recipients = TRUE;
5324 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5325 &user_msg, &log_msg);
5326 enable_dollar_recipients = FALSE;
5329 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5330 will just read the headers for the message, and not write anything onto the
5333 message_ended = END_NOTENDED;
5334 more = receive_msg(extract_recipients);
5336 /* more is always FALSE here (not SMTP message) when reading a message
5337 for real; when reading the headers of a message for filter testing,
5338 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5340 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5341 } /* Non-SMTP message reception */
5343 /* If this is a filter testing run, there are headers in store, but
5344 no message on the spool. Run the filtering code in testing mode, setting
5345 the domain to the qualify domain and the local part to the current user,
5346 unless they have been set by options. The prefix and suffix are left unset
5347 unless specified. The the return path is set to to the sender unless it has
5348 already been set from a return-path header in the message. */
5350 if (filter_test != FTEST_NONE)
5352 deliver_domain = (ftest_domain != NULL)?
5353 ftest_domain : qualify_domain_recipient;
5354 deliver_domain_orig = deliver_domain;
5355 deliver_localpart = (ftest_localpart != NULL)?
5356 ftest_localpart : originator_login;
5357 deliver_localpart_orig = deliver_localpart;
5358 deliver_localpart_prefix = ftest_prefix;
5359 deliver_localpart_suffix = ftest_suffix;
5360 deliver_home = originator_home;
5362 if (return_path == NULL)
5364 printf("Return-path copied from sender\n");
5365 return_path = string_copy(sender_address);
5369 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5371 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5373 receive_add_recipient(
5374 string_sprintf("%s%s%s@%s",
5375 (ftest_prefix == NULL)? US"" : ftest_prefix,
5377 (ftest_suffix == NULL)? US"" : ftest_suffix,
5378 deliver_domain), -1);
5380 printf("Recipient = %s\n", recipients_list[0].address);
5381 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5382 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5384 (void)chdir("/"); /* Get away from wherever the user is running this from */
5386 /* Now we run either a system filter test, or a user filter test, or both.
5387 In the latter case, headers added by the system filter will persist and be
5388 available to the user filter. We need to copy the filter variables
5391 if ((filter_test & FTEST_SYSTEM) != 0)
5393 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5394 exim_exit(EXIT_FAILURE);
5397 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5399 if ((filter_test & FTEST_USER) != 0)
5401 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5402 exim_exit(EXIT_FAILURE);
5405 exim_exit(EXIT_SUCCESS);
5408 /* Else act on the result of message reception. We should not get here unless
5409 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5410 will be TRUE. If it is not, check on the number of messages received in this
5413 if (!session_local_queue_only &&
5414 smtp_accept_queue_per_connection > 0 &&
5415 receive_messagecount > smtp_accept_queue_per_connection)
5417 session_local_queue_only = TRUE;
5418 queue_only_reason = 2;
5421 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5422 and queue_only_load is set, check that the load average is below it. If it is
5423 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5424 default), we put the whole session into queue_only mode. It then remains this
5425 way for any subsequent messages on the same SMTP connection. This is a
5426 deliberate choice; even though the load average may fall, it doesn't seem
5427 right to deliver later messages on the same call when not delivering earlier
5428 ones. However, there are odd cases where this is not wanted, so this can be
5429 changed by setting queue_only_load_latch false. */
5431 local_queue_only = session_local_queue_only;
5432 if (!local_queue_only && queue_only_load >= 0)
5434 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5435 if (local_queue_only)
5437 queue_only_reason = 3;
5438 if (queue_only_load_latch) session_local_queue_only = TRUE;
5442 /* If running as an MUA wrapper, all queueing options and freezing options
5446 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5448 /* Log the queueing here, when it will get a message id attached, but
5449 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5452 if (local_queue_only) switch(queue_only_reason)
5455 log_write(L_delay_delivery,
5456 LOG_MAIN, "no immediate delivery: more than %d messages "
5457 "received in one connection", smtp_accept_queue_per_connection);
5461 log_write(L_delay_delivery,
5462 LOG_MAIN, "no immediate delivery: load average %.2f",
5463 (double)load_average/1000.0);
5467 /* Else do the delivery unless the ACL or local_scan() called for queue only
5468 or froze the message. Always deliver in a separate process. A fork failure is
5469 not a disaster, as the delivery will eventually happen on a subsequent queue
5470 run. The search cache must be tidied before the fork, as the parent will
5471 do it before exiting. The child will trigger a lookup failure and
5472 thereby defer the delivery if it tries to use (for example) a cached ldap
5473 connection that the parent has called unbind on. */
5475 else if (!queue_only_policy && !deliver_freeze)
5480 if ((pid = fork()) == 0)
5483 close_unwanted(); /* Close unwanted file descriptors and TLS */
5484 exim_nullstd(); /* Ensure std{in,out,err} exist */
5486 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5487 mode, deliver_drop_privilege is forced TRUE). */
5489 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5491 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5493 /* Control does not return here. */
5496 /* No need to re-exec */
5498 rc = deliver_message(message_id, FALSE, FALSE);
5500 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5501 EXIT_SUCCESS : EXIT_FAILURE);
5506 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5507 "process: %s", strerror(errno));
5510 /* In the parent, wait if synchronous delivery is required. This will
5511 always be the case in MUA wrapper mode. */
5513 else if (synchronous_delivery)
5516 while (wait(&status) != pid);
5517 if ((status & 0x00ff) != 0)
5518 log_write(0, LOG_MAIN|LOG_PANIC,
5519 "process %d crashed with signal %d while delivering %s",
5520 (int)pid, status & 0x00ff, message_id);
5521 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5525 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5526 automatically reaps children (see comments above the loop), clear away any
5527 finished subprocesses here, in case there are lots of messages coming in
5528 from the same source. */
5530 #ifndef SIG_IGN_WORKS
5531 while (waitpid(-1, NULL, WNOHANG) > 0);
5535 exim_exit(EXIT_SUCCESS); /* Never returns */
5536 return 0; /* To stop compiler warning */