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 };
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:sieve list of supported sieve extensions, one per line.\n"
1051 for (pp = exim_sieve_extension_list; *pp; ++pp)
1052 fprintf(stream, "%s\n", *pp);
1059 /*************************************************
1060 * Quote a local part *
1061 *************************************************/
1063 /* This function is used when a sender address or a From: or Sender: header
1064 line is being created from the caller's login, or from an authenticated_id. It
1065 applies appropriate quoting rules for a local part.
1067 Argument: the local part
1068 Returns: the local part, quoted if necessary
1072 local_part_quote(uschar *lpart)
1074 BOOL needs_quote = FALSE;
1079 for (t = lpart; !needs_quote && *t != 0; t++)
1081 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1082 (*t != '.' || t == lpart || t[1] == 0);
1085 if (!needs_quote) return lpart;
1088 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1092 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1095 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1098 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1099 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1100 yield = string_cat(yield, &size, &ptr, nq, 1);
1104 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1112 /*************************************************
1113 * Load readline() functions *
1114 *************************************************/
1116 /* This function is called from testing executions that read data from stdin,
1117 but only when running as the calling user. Currently, only -be does this. The
1118 function loads the readline() function library and passes back the functions.
1119 On some systems, it needs the curses library, so load that too, but try without
1120 it if loading fails. All this functionality has to be requested at build time.
1123 fn_readline_ptr pointer to where to put the readline pointer
1124 fn_addhist_ptr pointer to where to put the addhistory function
1126 Returns: the dlopen handle or NULL on failure
1130 set_readline(char * (**fn_readline_ptr)(const char *),
1131 void (**fn_addhist_ptr)(const char *))
1134 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1136 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1137 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1139 if (dlhandle != NULL)
1141 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1142 * char * readline (const char *prompt);
1143 * void add_history (const char *string);
1145 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1146 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1150 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1159 /*************************************************
1160 * Get a line from stdin for testing things *
1161 *************************************************/
1163 /* This function is called when running tests that can take a number of lines
1164 of input (for example, -be and -bt). It handles continuations and trailing
1165 spaces. And prompting and a blank line output on eof. If readline() is in use,
1166 the arguments are non-NULL and provide the relevant functions.
1169 fn_readline readline function or NULL
1170 fn_addhist addhist function or NULL
1172 Returns: pointer to dynamic memory, or NULL at end of file
1176 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1181 uschar *yield = NULL;
1183 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1187 uschar buffer[1024];
1191 char *readline_line = NULL;
1192 if (fn_readline != NULL)
1194 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1195 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1196 p = US readline_line;
1201 /* readline() not in use */
1204 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1208 /* Handle the line */
1210 ss = p + (int)Ustrlen(p);
1211 while (ss > p && isspace(ss[-1])) ss--;
1215 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1218 yield = string_cat(yield, &size, &ptr, p, ss - p);
1221 if (fn_readline != NULL) free(readline_line);
1224 if (ss == p || yield[ptr-1] != '\\')
1232 if (yield == NULL) printf("\n");
1238 /*************************************************
1239 * Output usage information for the program *
1240 *************************************************/
1242 /* This function is called when there are no recipients
1243 or a specific --help argument was added.
1246 progname information on what name we were called by
1248 Returns: DOES NOT RETURN
1252 exim_usage(uschar *progname)
1255 /* Handle specific program invocation varients */
1256 if (Ustrcmp(progname, US"-mailq") == 0)
1259 "mailq - list the contents of the mail queue\n\n"
1260 "For a list of options, see the Exim documentation.\n");
1264 /* Generic usage - we output this whatever happens */
1266 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1267 "not directly from a shell command line. Options and/or arguments control\n"
1268 "what it does when called. For a list of options, see the Exim documentation.\n");
1275 /*************************************************
1276 * Validate that the macros given are okay *
1277 *************************************************/
1279 /* Typically, Exim will drop privileges if macros are supplied. In some
1280 cases, we want to not do so.
1282 Arguments: none (macros is a global)
1283 Returns: true if trusted, false otherwise
1287 macros_trusted(void)
1289 #ifdef WHITELIST_D_MACROS
1291 uschar *whitelisted, *end, *p, **whites, **w;
1292 int white_count, i, n;
1294 BOOL prev_char_item, found;
1299 #ifndef WHITELIST_D_MACROS
1303 /* We only trust -D overrides for some invoking users:
1304 root, the exim run-time user, the optional config owner user.
1305 I don't know why config-owner would be needed, but since they can own the
1306 config files anyway, there's no security risk to letting them override -D. */
1307 if ( ! ((real_uid == root_uid)
1308 || (real_uid == exim_uid)
1309 #ifdef CONFIGURE_OWNER
1310 || (real_uid == config_uid)
1314 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1318 /* Get a list of macros which are whitelisted */
1319 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1320 prev_char_item = FALSE;
1322 for (p = whitelisted; *p != '\0'; ++p)
1324 if (*p == ':' || isspace(*p))
1329 prev_char_item = FALSE;
1332 if (!prev_char_item)
1333 prev_char_item = TRUE;
1340 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1341 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1346 if (i == white_count)
1348 while (*p != '\0' && p < end)
1354 /* The list of macros should be very short. Accept the N*M complexity. */
1355 for (m = macros; m != NULL; m = m->next)
1358 for (w = whites; *w; ++w)
1359 if (Ustrcmp(*w, m->name) == 0)
1366 if (m->replacement == NULL)
1368 len = Ustrlen(m->replacement);
1371 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1372 0, PCRE_EOPT, NULL, 0);
1375 if (n != PCRE_ERROR_NOMATCH)
1376 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1380 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1386 /*************************************************
1387 * Entry point and high-level code *
1388 *************************************************/
1390 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1391 the appropriate action. All the necessary functions are present in the one
1392 binary. I originally thought one should split it up, but it turns out that so
1393 much of the apparatus is needed in each chunk that one might as well just have
1394 it all available all the time, which then makes the coding easier as well.
1397 argc count of entries in argv
1398 argv argument strings, with argv[0] being the program name
1400 Returns: EXIT_SUCCESS if terminated successfully
1401 EXIT_FAILURE otherwise, except when a message has been sent
1402 to the sender, and -oee was given
1406 main(int argc, char **cargv)
1408 uschar **argv = USS cargv;
1409 int arg_receive_timeout = -1;
1410 int arg_smtp_receive_timeout = -1;
1411 int arg_error_handling = error_handling;
1412 int filter_sfd = -1;
1413 int filter_ufd = -1;
1416 int list_queue_option = 0;
1418 int msg_action_arg = -1;
1419 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1420 int queue_only_reason = 0;
1422 int perl_start_option = 0;
1424 int recipients_arg = argc;
1425 int sender_address_domain = 0;
1426 int test_retry_arg = -1;
1427 int test_rewrite_arg = -1;
1428 BOOL arg_queue_only = FALSE;
1429 BOOL bi_option = FALSE;
1430 BOOL checking = FALSE;
1431 BOOL count_queue = FALSE;
1432 BOOL expansion_test = FALSE;
1433 BOOL extract_recipients = FALSE;
1434 BOOL forced_delivery = FALSE;
1435 BOOL f_end_dot = FALSE;
1436 BOOL deliver_give_up = FALSE;
1437 BOOL list_queue = FALSE;
1438 BOOL list_options = FALSE;
1439 BOOL local_queue_only;
1441 BOOL one_msg_action = FALSE;
1442 BOOL queue_only_set = FALSE;
1443 BOOL receiving_message = TRUE;
1444 BOOL sender_ident_set = FALSE;
1445 BOOL session_local_queue_only;
1447 BOOL removed_privilege = FALSE;
1448 BOOL usage_wanted = FALSE;
1449 BOOL verify_address_mode = FALSE;
1450 BOOL verify_as_sender = FALSE;
1451 BOOL version_printed = FALSE;
1452 uschar *alias_arg = NULL;
1453 uschar *called_as = US"";
1454 uschar *start_queue_run_id = NULL;
1455 uschar *stop_queue_run_id = NULL;
1456 uschar *expansion_test_message = NULL;
1457 uschar *ftest_domain = NULL;
1458 uschar *ftest_localpart = NULL;
1459 uschar *ftest_prefix = NULL;
1460 uschar *ftest_suffix = NULL;
1461 uschar *malware_test_file = NULL;
1462 uschar *real_sender_address;
1463 uschar *originator_home = US"/";
1467 struct stat statbuf;
1468 pid_t passed_qr_pid = (pid_t)0;
1469 int passed_qr_pipe = -1;
1470 gid_t group_list[NGROUPS_MAX];
1472 /* For the -bI: flag */
1473 enum commandline_info info_flag = CMDINFO_NONE;
1474 BOOL info_stdout = FALSE;
1476 /* Possible options for -R and -S */
1478 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1480 /* Need to define this in case we need to change the environment in order
1481 to get rid of a bogus time zone. We have to make it char rather than uschar
1482 because some OS define it in /usr/include/unistd.h. */
1484 extern char **environ;
1486 /* If the Exim user and/or group and/or the configuration file owner/group were
1487 defined by ref:name at build time, we must now find the actual uid/gid values.
1488 This is a feature to make the lives of binary distributors easier. */
1490 #ifdef EXIM_USERNAME
1491 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1495 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1499 /* If ref:name uses a number as the name, route_finduser() returns
1500 TRUE with exim_uid set and pw coerced to NULL. */
1502 exim_gid = pw->pw_gid;
1503 #ifndef EXIM_GROUPNAME
1507 "exim: ref:name should specify a usercode, not a group.\n"
1508 "exim: can't let you get away with it unless you also specify a group.\n");
1515 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1521 #ifdef EXIM_GROUPNAME
1522 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1524 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1530 #ifdef CONFIGURE_OWNERNAME
1531 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1533 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1534 CONFIGURE_OWNERNAME);
1539 /* We default the system_filter_user to be the Exim run-time user, as a
1540 sane non-root value. */
1541 system_filter_uid = exim_uid;
1543 #ifdef CONFIGURE_GROUPNAME
1544 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1546 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1547 CONFIGURE_GROUPNAME);
1552 /* In the Cygwin environment, some initialization needs doing. It is fudged
1553 in by means of this macro. */
1559 /* Check a field which is patched when we are running Exim within its
1560 testing harness; do a fast initial check, and then the whole thing. */
1562 running_in_test_harness =
1563 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1565 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1566 at the start of a program; however, it seems that some environments do not
1567 follow this. A "strange" locale can affect the formatting of timestamps, so we
1570 setlocale(LC_ALL, "C");
1572 /* Set up the default handler for timing using alarm(). */
1574 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1576 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1577 because store_malloc writes a log entry on failure. */
1579 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1580 if (log_buffer == NULL)
1582 fprintf(stderr, "exim: failed to get store for log buffer\n");
1586 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1587 NULL when the daemon is run and the file is closed. We have to use this
1588 indirection, because some systems don't allow writing to the variable "stderr".
1591 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1593 /* Arrange for the PCRE regex library to use our store functions. Note that
1594 the normal calls are actually macros that add additional arguments for
1595 debugging purposes so we have to assign specially constructed functions here.
1596 The default is to use store in the stacking pool, but this is overridden in the
1597 regex_must_compile() function. */
1599 pcre_malloc = function_store_get;
1600 pcre_free = function_dummy_free;
1602 /* Ensure there is a big buffer for temporary use in several places. It is put
1603 in malloc store so that it can be freed for enlargement if necessary. */
1605 big_buffer = store_malloc(big_buffer_size);
1607 /* Set up the handler for the data request signal, and set the initial
1608 descriptive text. */
1610 set_process_info("initializing");
1611 os_restarting_signal(SIGUSR1, usr1_handler);
1613 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1614 in the daemon code. For the rest of Exim's uses, we ignore it. */
1616 signal(SIGHUP, SIG_IGN);
1618 /* We don't want to die on pipe errors as the code is written to handle
1619 the write error instead. */
1621 signal(SIGPIPE, SIG_IGN);
1623 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1624 set to SIG_IGN. This causes subprocesses that complete before the parent
1625 process waits for them not to hang around, so when Exim calls wait(), nothing
1626 is there. The wait() code has been made robust against this, but let's ensure
1627 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1628 ending status. We use sigaction rather than plain signal() on those OS where
1629 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1630 problem on AIX with this.) */
1634 struct sigaction act;
1635 act.sa_handler = SIG_DFL;
1636 sigemptyset(&(act.sa_mask));
1638 sigaction(SIGCHLD, &act, NULL);
1641 signal(SIGCHLD, SIG_DFL);
1644 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1649 /* Set up the version number. Set up the leading 'E' for the external form of
1650 message ids, set the pointer to the internal form, and initialize it to
1651 indicate no message being processed. */
1654 message_id_option[0] = '-';
1655 message_id_external = message_id_option + 1;
1656 message_id_external[0] = 'E';
1657 message_id = message_id_external + 1;
1660 /* Set the umask to zero so that any files Exim creates using open() are
1661 created with the modes that it specifies. NOTE: Files created with fopen() have
1662 a problem, which was not recognized till rather late (February 2006). With this
1663 umask, such files will be world writeable. (They are all content scanning files
1664 in the spool directory, which isn't world-accessible, so this is not a
1665 disaster, but it's untidy.) I don't want to change this overall setting,
1666 however, because it will interact badly with the open() calls. Instead, there's
1667 now a function called modefopen() that fiddles with the umask while calling
1672 /* Precompile the regular expression for matching a message id. Keep this in
1673 step with the code that generates ids in the accept.c module. We need to do
1674 this here, because the -M options check their arguments for syntactic validity
1675 using mac_ismsgid, which uses this. */
1678 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1680 /* Precompile the regular expression that is used for matching an SMTP error
1681 code, possibly extended, at the start of an error message. Note that the
1682 terminating whitespace character is included. */
1685 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1688 #ifdef WHITELIST_D_MACROS
1689 /* Precompile the regular expression used to filter the content of macros
1690 given to -D for permissibility. */
1692 regex_whitelisted_macro =
1693 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1697 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1698 this seems to be a generally accepted convention, since one finds symbolic
1699 links called "mailq" in standard OS configurations. */
1701 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1702 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1705 receiving_message = FALSE;
1706 called_as = US"-mailq";
1709 /* If the program is called as "rmail" treat it as equivalent to
1710 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1711 i.e. preventing a single dot on a line from terminating the message, and
1712 returning with zero return code, even in cases of error (provided an error
1713 message has been sent). */
1715 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1716 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1719 called_as = US"-rmail";
1720 errors_sender_rc = EXIT_SUCCESS;
1723 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1724 this is a smail convention. */
1726 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1727 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1729 smtp_input = smtp_batched_input = TRUE;
1730 called_as = US"-rsmtp";
1733 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1734 this is a smail convention. */
1736 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1737 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1740 receiving_message = FALSE;
1741 called_as = US"-runq";
1744 /* If the program is called as "newaliases" treat it as equivalent to
1745 "exim -bi"; this is a sendmail convention. */
1747 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1748 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1751 receiving_message = FALSE;
1752 called_as = US"-newaliases";
1755 /* Save the original effective uid for a couple of uses later. It should
1756 normally be root, but in some esoteric environments it may not be. */
1758 original_euid = geteuid();
1760 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1761 to be the same as the real ones. This makes a difference only if Exim is setuid
1762 (or setgid) to something other than root, which could be the case in some
1763 special configurations. */
1765 real_uid = getuid();
1766 real_gid = getgid();
1768 if (real_uid == root_uid)
1770 rv = setgid(real_gid);
1773 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1774 (long int)real_gid, strerror(errno));
1777 rv = setuid(real_uid);
1780 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1781 (long int)real_uid, strerror(errno));
1786 /* If neither the original real uid nor the original euid was root, Exim is
1787 running in an unprivileged state. */
1789 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1791 /* Scan the program's arguments. Some can be dealt with right away; others are
1792 simply recorded for checking and handling afterwards. Do a high-level switch
1793 on the second character (the one after '-'), to save some effort. */
1795 for (i = 1; i < argc; i++)
1797 BOOL badarg = FALSE;
1798 uschar *arg = argv[i];
1802 /* An argument not starting with '-' is the start of a recipients list;
1803 break out of the options-scanning loop. */
1811 /* An option consistion of -- terminates the options */
1813 if (Ustrcmp(arg, "--") == 0)
1815 recipients_arg = i + 1;
1819 /* Handle flagged options */
1821 switchchar = arg[1];
1824 /* Make all -ex options synonymous with -oex arguments, since that
1825 is assumed by various callers. Also make -qR options synonymous with -R
1826 options, as that seems to be required as well. Allow for -qqR too, and
1827 the same for -S options. */
1829 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1830 Ustrncmp(arg+1, "qR", 2) == 0 ||
1831 Ustrncmp(arg+1, "qS", 2) == 0)
1833 switchchar = arg[2];
1836 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1838 switchchar = arg[3];
1840 queue_2stage = TRUE;
1843 /* Make -r synonymous with -f, since it is a documented alias */
1845 else if (arg[1] == 'r') switchchar = 'f';
1847 /* Make -ov synonymous with -v */
1849 else if (Ustrcmp(arg, "-ov") == 0)
1855 /* deal with --option_aliases */
1856 else if (switchchar == '-')
1858 if (Ustrcmp(argrest, "help") == 0)
1860 usage_wanted = TRUE;
1863 else if (Ustrcmp(argrest, "version") == 0)
1870 /* High-level switch on active initial letter */
1874 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1875 so has no need of it. */
1878 if (*argrest == 0) i++; /* Skip over the type */
1883 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1885 /* -bd: Run in daemon mode, awaiting SMTP connections.
1886 -bdf: Ditto, but in the foreground.
1889 if (*argrest == 'd')
1891 daemon_listen = TRUE;
1892 if (*(++argrest) == 'f') background_daemon = FALSE;
1893 else if (*argrest != 0) { badarg = TRUE; break; }
1896 /* -be: Run in expansion test mode
1897 -bem: Ditto, but read a message from a file first
1900 else if (*argrest == 'e')
1902 expansion_test = checking = TRUE;
1903 if (argrest[1] == 'm')
1905 if (++i >= argc) { badarg = TRUE; break; }
1906 expansion_test_message = argv[i];
1909 if (argrest[1] != 0) { badarg = TRUE; break; }
1912 /* -bF: Run system filter test */
1914 else if (*argrest == 'F')
1916 filter_test |= FTEST_SYSTEM;
1917 if (*(++argrest) != 0) { badarg = TRUE; break; }
1918 if (++i < argc) filter_test_sfile = argv[i]; else
1920 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1925 /* -bf: Run user filter test
1926 -bfd: Set domain for filter testing
1927 -bfl: Set local part for filter testing
1928 -bfp: Set prefix for filter testing
1929 -bfs: Set suffix for filter testing
1932 else if (*argrest == 'f')
1934 if (*(++argrest) == 0)
1936 filter_test |= FTEST_USER;
1937 if (++i < argc) filter_test_ufile = argv[i]; else
1939 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1947 fprintf(stderr, "exim: string expected after %s\n", arg);
1950 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1951 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1952 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1953 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1954 else { badarg = TRUE; break; }
1958 /* -bh: Host checking - an IP address must follow. */
1960 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1962 if (++i >= argc) { badarg = TRUE; break; }
1963 sender_host_address = argv[i];
1964 host_checking = checking = log_testing_mode = TRUE;
1965 host_checking_callout = argrest[1] == 'c';
1968 /* -bi: This option is used by sendmail to initialize *the* alias file,
1969 though it has the -oA option to specify a different file. Exim has no
1970 concept of *the* alias file, but since Sun's YP make script calls
1971 sendmail this way, some support must be provided. */
1973 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1975 /* -bI: provide information, of the type to follow after a colon.
1976 This is an Exim flag. */
1978 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
1980 uschar *p = &argrest[2];
1981 info_flag = CMDINFO_HELP;
1984 if (strcmpic(p, CUS"sieve") == 0)
1986 info_flag = CMDINFO_SIEVE;
1989 else if (strcmpic(p, CUS"help") == 0)
1996 /* -bm: Accept and deliver message - the default option. Reinstate
1997 receiving_message, which got turned off for all -b options. */
1999 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2001 /* -bmalware: test the filename given for malware */
2003 else if (Ustrcmp(argrest, "malware") == 0)
2005 if (++i >= argc) { badarg = TRUE; break; }
2006 malware_test_file = argv[i];
2009 /* -bnq: For locally originating messages, do not qualify unqualified
2010 addresses. In the envelope, this causes errors; in header lines they
2013 else if (Ustrcmp(argrest, "nq") == 0)
2015 allow_unqualified_sender = FALSE;
2016 allow_unqualified_recipient = FALSE;
2019 /* -bpxx: List the contents of the mail queue, in various forms. If
2020 the option is -bpc, just a queue count is needed. Otherwise, if the
2021 first letter after p is r, then order is random. */
2023 else if (*argrest == 'p')
2025 if (*(++argrest) == 'c')
2028 if (*(++argrest) != 0) badarg = TRUE;
2032 if (*argrest == 'r')
2034 list_queue_option = 8;
2037 else list_queue_option = 0;
2041 /* -bp: List the contents of the mail queue, top-level only */
2043 if (*argrest == 0) {}
2045 /* -bpu: List the contents of the mail queue, top-level undelivered */
2047 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2049 /* -bpa: List the contents of the mail queue, including all delivered */
2051 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2053 /* Unknown after -bp[r] */
2063 /* -bP: List the configuration variables given as the address list.
2064 Force -v, so configuration errors get displayed. */
2066 else if (Ustrcmp(argrest, "P") == 0)
2068 list_options = TRUE;
2069 debug_selector |= D_v;
2070 debug_file = stderr;
2073 /* -brt: Test retry configuration lookup */
2075 else if (Ustrcmp(argrest, "rt") == 0)
2077 test_retry_arg = i + 1;
2081 /* -brw: Test rewrite configuration */
2083 else if (Ustrcmp(argrest, "rw") == 0)
2085 test_rewrite_arg = i + 1;
2089 /* -bS: Read SMTP commands on standard input, but produce no replies -
2090 all errors are reported by sending messages. */
2092 else if (Ustrcmp(argrest, "S") == 0)
2093 smtp_input = smtp_batched_input = receiving_message = TRUE;
2095 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2096 on standard output. */
2098 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2100 /* -bt: address testing mode */
2102 else if (Ustrcmp(argrest, "t") == 0)
2103 address_test_mode = checking = log_testing_mode = TRUE;
2105 /* -bv: verify addresses */
2107 else if (Ustrcmp(argrest, "v") == 0)
2108 verify_address_mode = checking = log_testing_mode = TRUE;
2110 /* -bvs: verify sender addresses */
2112 else if (Ustrcmp(argrest, "vs") == 0)
2114 verify_address_mode = checking = log_testing_mode = TRUE;
2115 verify_as_sender = TRUE;
2118 /* -bV: Print version string and support details */
2120 else if (Ustrcmp(argrest, "V") == 0)
2122 printf("Exim version %s #%s built %s\n", version_string,
2123 version_cnumber, version_date);
2124 printf("%s\n", CS version_copyright);
2125 version_printed = TRUE;
2126 show_whats_supported(stdout);
2129 /* -bw: inetd wait mode, accept a listening socket as stdin */
2131 else if (*argrest == 'w')
2133 inetd_wait_mode = TRUE;
2134 background_daemon = FALSE;
2135 daemon_listen = TRUE;
2136 if (*(++argrest) != '\0')
2138 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2139 if (inetd_wait_timeout <= 0)
2141 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2151 /* -C: change configuration file list; ignore if it isn't really
2152 a change! Enforce a prefix check if required. */
2157 if(++i < argc) argrest = argv[i]; else
2158 { badarg = TRUE; break; }
2160 if (Ustrcmp(config_main_filelist, argrest) != 0)
2162 #ifdef ALT_CONFIG_PREFIX
2164 int len = Ustrlen(ALT_CONFIG_PREFIX);
2165 uschar *list = argrest;
2167 while((filename = string_nextinlist(&list, &sep, big_buffer,
2168 big_buffer_size)) != NULL)
2170 if ((Ustrlen(filename) < len ||
2171 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2172 Ustrstr(filename, "/../") != NULL) &&
2173 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2175 fprintf(stderr, "-C Permission denied\n");
2180 if (real_uid != root_uid)
2182 #ifdef TRUSTED_CONFIG_LIST
2184 if (real_uid != exim_uid
2185 #ifdef CONFIGURE_OWNER
2186 && real_uid != config_uid
2189 trusted_config = FALSE;
2192 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2195 struct stat statbuf;
2197 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2198 (statbuf.st_uid != root_uid /* owner not root */
2199 #ifdef CONFIGURE_OWNER
2200 && statbuf.st_uid != config_uid /* owner not the special one */
2203 (statbuf.st_gid != root_gid /* group not root */
2204 #ifdef CONFIGURE_GROUP
2205 && statbuf.st_gid != config_gid /* group not the special one */
2207 && (statbuf.st_mode & 020) != 0 /* group writeable */
2209 (statbuf.st_mode & 2) != 0) /* world writeable */
2211 trusted_config = FALSE;
2216 /* Well, the trust list at least is up to scratch... */
2217 void *reset_point = store_get(0);
2218 uschar *trusted_configs[32];
2222 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2224 uschar *start = big_buffer, *nl;
2225 while (*start && isspace(*start))
2229 nl = Ustrchr(start, '\n');
2232 trusted_configs[nr_configs++] = string_copy(start);
2233 if (nr_configs == 32)
2241 uschar *list = argrest;
2243 while (trusted_config && (filename = string_nextinlist(&list,
2244 &sep, big_buffer, big_buffer_size)) != NULL)
2246 for (i=0; i < nr_configs; i++)
2248 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2251 if (i == nr_configs)
2253 trusted_config = FALSE;
2257 store_reset(reset_point);
2261 /* No valid prefixes found in trust_list file. */
2262 trusted_config = FALSE;
2268 /* Could not open trust_list file. */
2269 trusted_config = FALSE;
2273 /* Not root; don't trust config */
2274 trusted_config = FALSE;
2278 config_main_filelist = argrest;
2279 config_changed = TRUE;
2284 /* -D: set up a macro definition */
2287 #ifdef DISABLE_D_OPTION
2288 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2293 macro_item *mlast = NULL;
2296 uschar *s = argrest;
2298 while (isspace(*s)) s++;
2300 if (*s < 'A' || *s > 'Z')
2302 fprintf(stderr, "exim: macro name set by -D must start with "
2303 "an upper case letter\n");
2307 while (isalnum(*s) || *s == '_')
2309 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2313 if (ptr == 0) { badarg = TRUE; break; }
2314 while (isspace(*s)) s++;
2317 if (*s++ != '=') { badarg = TRUE; break; }
2318 while (isspace(*s)) s++;
2321 for (m = macros; m != NULL; m = m->next)
2323 if (Ustrcmp(m->name, name) == 0)
2325 fprintf(stderr, "exim: duplicated -D in command line\n");
2331 m = store_get(sizeof(macro_item) + Ustrlen(name));
2333 m->command_line = TRUE;
2334 if (mlast == NULL) macros = m; else mlast->next = m;
2335 Ustrcpy(m->name, name);
2336 m->replacement = string_copy(s);
2338 if (clmacro_count >= MAX_CLMACROS)
2340 fprintf(stderr, "exim: too many -D options on command line\n");
2343 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2349 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2350 The latter is now a no-op, retained for compatibility only. If -dd is used,
2351 debugging subprocesses of the daemon is disabled. */
2354 if (Ustrcmp(argrest, "ropcr") == 0)
2356 /* drop_cr = TRUE; */
2359 /* Use an intermediate variable so that we don't set debugging while
2360 decoding the debugging bits. */
2364 unsigned int selector = D_default;
2367 if (*argrest == 'd')
2369 debug_daemon = TRUE;
2373 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2374 debug_options_count, US"debug", 0);
2375 debug_selector = selector;
2380 /* -E: This is a local error message. This option is not intended for
2381 external use at all, but is not restricted to trusted callers because it
2382 does no harm (just suppresses certain error messages) and if Exim is run
2383 not setuid root it won't always be trusted when it generates error
2384 messages using this option. If there is a message id following -E, point
2385 message_reference at it, for logging. */
2388 local_error_message = TRUE;
2389 if (mac_ismsgid(argrest)) message_reference = argrest;
2393 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2394 option, so it looks as if historically the -oex options are also callable
2395 without the leading -o. So we have to accept them. Before the switch,
2396 anything starting -oe has been converted to -e. Exim does not support all
2397 of the sendmail error options. */
2400 if (Ustrcmp(argrest, "e") == 0)
2402 arg_error_handling = ERRORS_SENDER;
2403 errors_sender_rc = EXIT_SUCCESS;
2405 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2406 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2407 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2408 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2413 /* -F: Set sender's full name, used instead of the gecos entry from
2414 the password file. Since users can usually alter their gecos entries,
2415 there's no security involved in using this instead. The data can follow
2416 the -F or be in the next argument. */
2421 if(++i < argc) argrest = argv[i]; else
2422 { badarg = TRUE; break; }
2424 originator_name = argrest;
2425 sender_name_forced = TRUE;
2429 /* -f: Set sender's address - this value is only actually used if Exim is
2430 run by a trusted user, or if untrusted_set_sender is set and matches the
2431 address, except that the null address can always be set by any user. The
2432 test for this happens later, when the value given here is ignored when not
2433 permitted. For an untrusted user, the actual sender is still put in Sender:
2434 if it doesn't match the From: header (unless no_local_from_check is set).
2435 The data can follow the -f or be in the next argument. The -r switch is an
2436 obsolete form of -f but since there appear to be programs out there that
2437 use anything that sendmail has ever supported, better accept it - the
2438 synonymizing is done before the switch above.
2440 At this stage, we must allow domain literal addresses, because we don't
2441 know what the setting of allow_domain_literals is yet. Ditto for trailing
2442 dots and strip_trailing_dot. */
2450 if (i+1 < argc) argrest = argv[++i]; else
2451 { badarg = TRUE; break; }
2455 sender_address = string_sprintf(""); /* Ensure writeable memory */
2459 uschar *temp = argrest + Ustrlen(argrest) - 1;
2460 while (temp >= argrest && isspace(*temp)) temp--;
2461 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2462 allow_domain_literals = TRUE;
2463 strip_trailing_dot = TRUE;
2464 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2465 &sender_address_domain, TRUE);
2466 allow_domain_literals = FALSE;
2467 strip_trailing_dot = FALSE;
2468 if (sender_address == NULL)
2470 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2471 return EXIT_FAILURE;
2474 sender_address_forced = TRUE;
2478 /* This is some Sendmail thing which can be ignored */
2483 /* -h: Set the hop count for an incoming message. Exim does not currently
2484 support this; it always computes it by counting the Received: headers.
2485 To put it in will require a change to the spool header file format. */
2490 if(++i < argc) argrest = argv[i]; else
2491 { badarg = TRUE; break; }
2493 if (!isdigit(*argrest)) badarg = TRUE;
2497 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2498 not to be documented for sendmail but mailx (at least) uses it) */
2501 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2506 receiving_message = FALSE;
2508 /* -MC: continue delivery of another message via an existing open
2509 file descriptor. This option is used for an internal call by the
2510 smtp transport when there is a pending message waiting to go to an
2511 address to which it has got a connection. Five subsequent arguments are
2512 required: transport name, host name, IP address, sequence number, and
2513 message_id. Transports may decline to create new processes if the sequence
2514 number gets too big. The channel is stdin. This (-MC) must be the last
2515 argument. There's a subsequent check that the real-uid is privileged.
2517 If we are running in the test harness. delay for a bit, to let the process
2518 that set this one up complete. This makes for repeatability of the logging,
2521 if (Ustrcmp(argrest, "C") == 0)
2523 union sockaddr_46 interface_sock;
2524 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2528 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2529 return EXIT_FAILURE;
2532 if (msg_action_arg >= 0)
2534 fprintf(stderr, "exim: incompatible arguments\n");
2535 return EXIT_FAILURE;
2538 continue_transport = argv[++i];
2539 continue_hostname = argv[++i];
2540 continue_host_address = argv[++i];
2541 continue_sequence = Uatoi(argv[++i]);
2542 msg_action = MSG_DELIVER;
2543 msg_action_arg = ++i;
2544 forced_delivery = TRUE;
2545 queue_run_pid = passed_qr_pid;
2546 queue_run_pipe = passed_qr_pipe;
2548 if (!mac_ismsgid(argv[i]))
2550 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2552 return EXIT_FAILURE;
2555 /* Set up $sending_ip_address and $sending_port */
2557 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2559 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2563 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2565 return EXIT_FAILURE;
2568 if (running_in_test_harness) millisleep(500);
2572 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2573 precedes -MC (see above). The flag indicates that the host to which
2574 Exim is connected has accepted an AUTH sequence. */
2576 else if (Ustrcmp(argrest, "CA") == 0)
2578 smtp_authenticated = TRUE;
2582 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2583 it preceded -MC (see above) */
2585 else if (Ustrcmp(argrest, "CP") == 0)
2587 smtp_use_pipelining = TRUE;
2591 /* -MCQ: pass on the pid of the queue-running process that started
2592 this chain of deliveries and the fd of its synchronizing pipe; this
2593 is useful only when it precedes -MC (see above) */
2595 else if (Ustrcmp(argrest, "CQ") == 0)
2597 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2599 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2604 /* -MCS: set the smtp_use_size flag; this is useful only when it
2605 precedes -MC (see above) */
2607 else if (Ustrcmp(argrest, "CS") == 0)
2609 smtp_use_size = TRUE;
2613 /* -MCT: set the tls_offered flag; this is useful only when it
2614 precedes -MC (see above). The flag indicates that the host to which
2615 Exim is connected has offered TLS support. */
2618 else if (Ustrcmp(argrest, "CT") == 0)
2625 /* -M[x]: various operations on the following list of message ids:
2626 -M deliver the messages, ignoring next retry times and thawing
2627 -Mc deliver the messages, checking next retry times, no thawing
2628 -Mf freeze the messages
2629 -Mg give up on the messages
2630 -Mt thaw the messages
2631 -Mrm remove the messages
2632 In the above cases, this must be the last option. There are also the
2633 following options which are followed by a single message id, and which
2634 act on that message. Some of them use the "recipient" addresses as well.
2635 -Mar add recipient(s)
2636 -Mmad mark all recipients delivered
2637 -Mmd mark recipients(s) delivered
2639 -Mset load a message for use with -be
2641 -Mvc show copy (of whole message, in RFC 2822 format)
2646 else if (*argrest == 0)
2648 msg_action = MSG_DELIVER;
2649 forced_delivery = deliver_force_thaw = TRUE;
2651 else if (Ustrcmp(argrest, "ar") == 0)
2653 msg_action = MSG_ADD_RECIPIENT;
2654 one_msg_action = TRUE;
2656 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2657 else if (Ustrcmp(argrest, "es") == 0)
2659 msg_action = MSG_EDIT_SENDER;
2660 one_msg_action = TRUE;
2662 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2663 else if (Ustrcmp(argrest, "g") == 0)
2665 msg_action = MSG_DELIVER;
2666 deliver_give_up = TRUE;
2668 else if (Ustrcmp(argrest, "mad") == 0)
2670 msg_action = MSG_MARK_ALL_DELIVERED;
2672 else if (Ustrcmp(argrest, "md") == 0)
2674 msg_action = MSG_MARK_DELIVERED;
2675 one_msg_action = TRUE;
2677 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2678 else if (Ustrcmp(argrest, "set") == 0)
2680 msg_action = MSG_LOAD;
2681 one_msg_action = TRUE;
2683 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2684 else if (Ustrcmp(argrest, "vb") == 0)
2686 msg_action = MSG_SHOW_BODY;
2687 one_msg_action = TRUE;
2689 else if (Ustrcmp(argrest, "vc") == 0)
2691 msg_action = MSG_SHOW_COPY;
2692 one_msg_action = TRUE;
2694 else if (Ustrcmp(argrest, "vh") == 0)
2696 msg_action = MSG_SHOW_HEADER;
2697 one_msg_action = TRUE;
2699 else if (Ustrcmp(argrest, "vl") == 0)
2701 msg_action = MSG_SHOW_LOG;
2702 one_msg_action = TRUE;
2704 else { badarg = TRUE; break; }
2706 /* All the -Mxx options require at least one message id. */
2708 msg_action_arg = i + 1;
2709 if (msg_action_arg >= argc)
2711 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2712 return EXIT_FAILURE;
2715 /* Some require only message ids to follow */
2717 if (!one_msg_action)
2720 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2722 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2724 return EXIT_FAILURE;
2726 goto END_ARG; /* Remaining args are ids */
2729 /* Others require only one message id, possibly followed by addresses,
2730 which will be handled as normal arguments. */
2734 if (!mac_ismsgid(argv[msg_action_arg]))
2736 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2737 argv[msg_action_arg], arg);
2738 return EXIT_FAILURE;
2745 /* Some programs seem to call the -om option without the leading o;
2746 for sendmail it askes for "me too". Exim always does this. */
2749 if (*argrest != 0) badarg = TRUE;
2753 /* -N: don't do delivery - a debugging option that stops transports doing
2754 their thing. It implies debugging at the D_v level. */
2759 dont_deliver = TRUE;
2760 debug_selector |= D_v;
2761 debug_file = stderr;
2767 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2773 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2774 option to the specified value. This form uses long names. We need to handle
2775 -O option=value and -Ooption=value. */
2782 fprintf(stderr, "exim: string expected after -O\n");
2790 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2793 if (*argrest == 'A')
2795 alias_arg = argrest + 1;
2796 if (alias_arg[0] == 0)
2798 if (i+1 < argc) alias_arg = argv[++i]; else
2800 fprintf(stderr, "exim: string expected after -oA\n");
2806 /* -oB: Set a connection message max value for remote deliveries */
2808 else if (*argrest == 'B')
2810 uschar *p = argrest + 1;
2813 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2815 connection_max_messages = 1;
2824 fprintf(stderr, "exim: number expected after -oB\n");
2827 connection_max_messages = Uatoi(p);
2831 /* -odb: background delivery */
2833 else if (Ustrcmp(argrest, "db") == 0)
2835 synchronous_delivery = FALSE;
2836 arg_queue_only = FALSE;
2837 queue_only_set = TRUE;
2840 /* -odf: foreground delivery (smail-compatible option); same effect as
2841 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2844 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2846 synchronous_delivery = TRUE;
2847 arg_queue_only = FALSE;
2848 queue_only_set = TRUE;
2851 /* -odq: queue only */
2853 else if (Ustrcmp(argrest, "dq") == 0)
2855 synchronous_delivery = FALSE;
2856 arg_queue_only = TRUE;
2857 queue_only_set = TRUE;
2860 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2861 but no remote delivery */
2863 else if (Ustrcmp(argrest, "dqs") == 0)
2866 arg_queue_only = FALSE;
2867 queue_only_set = TRUE;
2870 /* -oex: Sendmail error flags. As these are also accepted without the
2871 leading -o prefix, for compatibility with vacation and other callers,
2872 they are handled with -e above. */
2874 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2875 -oitrue: Another sendmail syntax for the same */
2877 else if (Ustrcmp(argrest, "i") == 0 ||
2878 Ustrcmp(argrest, "itrue") == 0)
2881 /* -oM*: Set various characteristics for an incoming message; actually
2882 acted on for trusted callers only. */
2884 else if (*argrest == 'M')
2888 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2892 /* -oMa: Set sender host address */
2894 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2896 /* -oMaa: Set authenticator name */
2898 else if (Ustrcmp(argrest, "Maa") == 0)
2899 sender_host_authenticated = argv[++i];
2901 /* -oMas: setting authenticated sender */
2903 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2905 /* -oMai: setting authenticated id */
2907 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2909 /* -oMi: Set incoming interface address */
2911 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2913 /* -oMr: Received protocol */
2915 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2917 /* -oMs: Set sender host name */
2919 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2921 /* -oMt: Set sender ident */
2923 else if (Ustrcmp(argrest, "Mt") == 0)
2925 sender_ident_set = TRUE;
2926 sender_ident = argv[++i];
2929 /* Else a bad argument */
2938 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2939 seem to call this as -m (undocumented), so that is also accepted (see
2942 else if (Ustrcmp(argrest, "m") == 0) {}
2944 /* -oo: An ancient flag for old-style addresses which still seems to
2945 crop up in some calls (see in SCO). */
2947 else if (Ustrcmp(argrest, "o") == 0) {}
2949 /* -oP <name>: set pid file path for daemon */
2951 else if (Ustrcmp(argrest, "P") == 0)
2952 override_pid_file_path = argv[++i];
2954 /* -or <n>: set timeout for non-SMTP acceptance
2955 -os <n>: set timeout for SMTP acceptance */
2957 else if (*argrest == 'r' || *argrest == 's')
2959 int *tp = (*argrest == 'r')?
2960 &arg_receive_timeout : &arg_smtp_receive_timeout;
2961 if (argrest[1] == 0)
2963 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2965 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2968 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2973 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2975 else if (Ustrcmp(argrest, "X") == 0)
2976 override_local_interfaces = argv[++i];
2978 /* Unknown -o argument */
2984 /* -ps: force Perl startup; -pd force delayed Perl startup */
2988 if (*argrest == 's' && argrest[1] == 0)
2990 perl_start_option = 1;
2993 if (*argrest == 'd' && argrest[1] == 0)
2995 perl_start_option = -1;
3000 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3001 which sets the host protocol and host name */
3005 if (i+1 < argc) argrest = argv[++i]; else
3006 { badarg = TRUE; break; }
3011 uschar *hn = Ustrchr(argrest, ':');
3014 received_protocol = argrest;
3018 received_protocol = string_copyn(argrest, hn - argrest);
3019 sender_host_name = hn + 1;
3026 receiving_message = FALSE;
3027 if (queue_interval >= 0)
3029 fprintf(stderr, "exim: -q specified more than once\n");
3033 /* -qq...: Do queue runs in a 2-stage manner */
3035 if (*argrest == 'q')
3037 queue_2stage = TRUE;
3041 /* -qi...: Do only first (initial) deliveries */
3043 if (*argrest == 'i')
3045 queue_run_first_delivery = TRUE;
3049 /* -qf...: Run the queue, forcing deliveries
3050 -qff..: Ditto, forcing thawing as well */
3052 if (*argrest == 'f')
3054 queue_run_force = TRUE;
3055 if (*(++argrest) == 'f')
3057 deliver_force_thaw = TRUE;
3062 /* -q[f][f]l...: Run the queue only on local deliveries */
3064 if (*argrest == 'l')
3066 queue_run_local = TRUE;
3070 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3071 optionally starting from a given message id. */
3073 if (*argrest == 0 &&
3074 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3077 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3078 start_queue_run_id = argv[++i];
3079 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3080 stop_queue_run_id = argv[++i];
3083 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3084 optionally local only. */
3089 queue_interval = readconf_readtime(argrest, 0, FALSE);
3091 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3092 if (queue_interval <= 0)
3094 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3101 case 'R': /* Synonymous with -qR... */
3102 receiving_message = FALSE;
3104 /* -Rf: As -R (below) but force all deliveries,
3105 -Rff: Ditto, but also thaw all frozen messages,
3106 -Rr: String is regex
3107 -Rrf: Regex and force
3108 -Rrff: Regex and force and thaw
3110 in all cases provided there are no further characters in this
3116 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3118 if (Ustrcmp(argrest, rsopts[i]) == 0)
3120 if (i != 2) queue_run_force = TRUE;
3121 if (i >= 2) deliver_selectstring_regex = TRUE;
3122 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3123 argrest += Ustrlen(rsopts[i]);
3128 /* -R: Set string to match in addresses for forced queue run to
3129 pick out particular messages. */
3133 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3135 fprintf(stderr, "exim: string expected after -R\n");
3139 else deliver_selectstring = argrest;
3143 /* -r: an obsolete synonym for -f (see above) */
3146 /* -S: Like -R but works on sender. */
3148 case 'S': /* Synonymous with -qS... */
3149 receiving_message = FALSE;
3151 /* -Sf: As -S (below) but force all deliveries,
3152 -Sff: Ditto, but also thaw all frozen messages,
3153 -Sr: String is regex
3154 -Srf: Regex and force
3155 -Srff: Regex and force and thaw
3157 in all cases provided there are no further characters in this
3163 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3165 if (Ustrcmp(argrest, rsopts[i]) == 0)
3167 if (i != 2) queue_run_force = TRUE;
3168 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3169 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3170 argrest += Ustrlen(rsopts[i]);
3175 /* -S: Set string to match in addresses for forced queue run to
3176 pick out particular messages. */
3180 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3182 fprintf(stderr, "exim: string expected after -S\n");
3186 else deliver_selectstring_sender = argrest;
3189 /* -Tqt is an option that is exclusively for use by the testing suite.
3190 It is not recognized in other circumstances. It allows for the setting up
3191 of explicit "queue times" so that various warning/retry things can be
3192 tested. Otherwise variability of clock ticks etc. cause problems. */
3195 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3196 fudged_queue_times = argv[++i];
3201 /* -t: Set flag to extract recipients from body of message. */
3204 if (*argrest == 0) extract_recipients = TRUE;
3206 /* -ti: Set flag to extract recipients from body of message, and also
3207 specify that dot does not end the message. */
3209 else if (Ustrcmp(argrest, "i") == 0)
3211 extract_recipients = TRUE;
3215 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3218 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3225 /* -U: This means "initial user submission" in sendmail, apparently. The
3226 doc claims that in future sendmail may refuse syntactically invalid
3227 messages instead of fixing them. For the moment, we just ignore it. */
3233 /* -v: verify things - this is a very low-level debugging */
3238 debug_selector |= D_v;
3239 debug_file = stderr;
3245 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3247 The -x flag tells the sendmail command that mail from a local
3248 mail program has National Language Support (NLS) extended characters
3249 in the body of the mail item. The sendmail command can send mail with
3250 extended NLS characters across networks that normally corrupts these
3253 As Exim is 8-bit clean, it just ignores this flag. */
3256 if (*argrest != 0) badarg = TRUE;
3259 /* All other initial characters are errors */
3264 } /* End of high-level switch statement */
3266 /* Failed to recognize the option, or syntax error */
3270 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3271 "option %s\n", arg);
3277 /* If -R or -S have been specified without -q, assume a single queue run. */
3279 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3280 queue_interval < 0) queue_interval = 0;
3284 /* If usage_wanted is set we call the usage function - which never returns */
3285 if (usage_wanted) exim_usage(called_as);
3287 /* Arguments have been processed. Check for incompatibilities. */
3289 (smtp_input || extract_recipients || recipients_arg < argc) &&
3290 (daemon_listen || queue_interval >= 0 || bi_option ||
3291 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3292 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3295 msg_action_arg > 0 &&
3296 (daemon_listen || queue_interval >= 0 || list_options ||
3297 (checking && msg_action != MSG_LOAD) ||
3298 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3301 (daemon_listen || queue_interval >= 0) &&
3302 (sender_address != NULL || list_options || list_queue || checking ||
3306 daemon_listen && queue_interval == 0
3309 inetd_wait_mode && queue_interval >= 0
3313 (checking || smtp_input || extract_recipients ||
3314 filter_test != FTEST_NONE || bi_option)
3317 verify_address_mode &&
3318 (address_test_mode || smtp_input || extract_recipients ||
3319 filter_test != FTEST_NONE || bi_option)
3322 address_test_mode && (smtp_input || extract_recipients ||
3323 filter_test != FTEST_NONE || bi_option)
3326 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3330 deliver_selectstring != NULL && queue_interval < 0
3333 msg_action == MSG_LOAD &&
3334 (!expansion_test || expansion_test_message != NULL)
3338 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3342 /* If debugging is set up, set the file and the file descriptor to pass on to
3343 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3344 to run in the foreground. */
3346 if (debug_selector != 0)
3348 debug_file = stderr;
3349 debug_fd = fileno(debug_file);
3350 background_daemon = FALSE;
3351 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3352 if (debug_selector != D_v) /* -v only doesn't show this */
3354 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3355 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3357 if (!version_printed)
3358 show_whats_supported(stderr);
3362 /* When started with root privilege, ensure that the limits on the number of
3363 open files and the number of processes (where that is accessible) are
3364 sufficiently large, or are unset, in case Exim has been called from an
3365 environment where the limits are screwed down. Not all OS have the ability to
3366 change some of these limits. */
3370 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3376 #ifdef RLIMIT_NOFILE
3377 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3379 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3381 rlp.rlim_cur = rlp.rlim_max = 0;
3384 /* I originally chose 1000 as a nice big number that was unlikely to
3385 be exceeded. It turns out that some older OS have a fixed upper limit of
3388 if (rlp.rlim_cur < 1000)
3390 rlp.rlim_cur = rlp.rlim_max = 1000;
3391 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3393 rlp.rlim_cur = rlp.rlim_max = 256;
3394 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3395 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3402 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3404 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3406 rlp.rlim_cur = rlp.rlim_max = 0;
3409 #ifdef RLIM_INFINITY
3410 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3412 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3414 if (rlp.rlim_cur < 1000)
3416 rlp.rlim_cur = rlp.rlim_max = 1000;
3418 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3419 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3425 /* Exim is normally entered as root (but some special configurations are
3426 possible that don't do this). However, it always spins off sub-processes that
3427 set their uid and gid as required for local delivery. We don't want to pass on
3428 any extra groups that root may belong to, so we want to get rid of them all at
3431 We need to obey setgroups() at this stage, before possibly giving up root
3432 privilege for a changed configuration file, but later on we might need to
3433 check on the additional groups for the admin user privilege - can't do that
3434 till after reading the config, which might specify the exim gid. Therefore,
3435 save the group list here first. */
3437 group_count = getgroups(NGROUPS_MAX, group_list);
3438 if (group_count < 0)
3440 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3444 /* There is a fundamental difference in some BSD systems in the matter of
3445 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3446 known not to be different. On the "different" systems there is a single group
3447 list, and the first entry in it is the current group. On all other versions of
3448 Unix there is a supplementary group list, which is in *addition* to the current
3449 group. Consequently, to get rid of all extraneous groups on a "standard" system
3450 you pass over 0 groups to setgroups(), while on a "different" system you pass
3451 over a single group - the current group, which is always the first group in the
3452 list. Calling setgroups() with zero groups on a "different" system results in
3453 an error return. The following code should cope with both types of system.
3455 However, if this process isn't running as root, setgroups() can't be used
3456 since you have to be root to run it, even if throwing away groups. Not being
3457 root here happens only in some unusual configurations. We just ignore the
3460 if (setgroups(0, NULL) != 0)
3462 if (setgroups(1, group_list) != 0 && !unprivileged)
3464 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3469 /* If the configuration file name has been altered by an argument on the
3470 command line (either a new file name or a macro definition) and the caller is
3471 not root, or if this is a filter testing run, remove any setuid privilege the
3472 program has and run as the underlying user.
3474 The exim user is locked out of this, which severely restricts the use of -C
3477 Otherwise, set the real ids to the effective values (should be root unless run
3478 from inetd, which it can either be root or the exim uid, if one is configured).
3480 There is a private mechanism for bypassing some of this, in order to make it
3481 possible to test lots of configurations automatically, without having either to
3482 recompile each time, or to patch in an actual configuration file name and other
3483 values (such as the path name). If running in the test harness, pretend that
3484 configuration file changes and macro definitions haven't happened. */
3487 (!trusted_config || /* Config changed, or */
3488 !macros_trusted()) && /* impermissible macros and */
3489 real_uid != root_uid && /* Not root, and */
3490 !running_in_test_harness /* Not fudged */
3492 expansion_test /* expansion testing */
3494 filter_test != FTEST_NONE) /* Filter testing */
3496 setgroups(group_count, group_list);
3497 exim_setugid(real_uid, real_gid, FALSE,
3498 US"-C, -D, -be or -bf forces real uid");
3499 removed_privilege = TRUE;
3501 /* In the normal case when Exim is called like this, stderr is available
3502 and should be used for any logging information because attempts to write
3503 to the log will usually fail. To arrange this, we unset really_exim. However,
3504 if no stderr is available there is no point - we might as well have a go
3505 at the log (if it fails, syslog will be written).
3507 Note that if the invoker is Exim, the logs remain available. Messing with
3508 this causes unlogged successful deliveries. */
3510 if ((log_stderr != NULL) && (real_uid != exim_uid))
3511 really_exim = FALSE;
3514 /* Privilege is to be retained for the moment. It may be dropped later,
3515 depending on the job that this Exim process has been asked to do. For now, set
3516 the real uid to the effective so that subsequent re-execs of Exim are done by a
3519 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3521 /* If testing a filter, open the file(s) now, before wasting time doing other
3522 setups and reading the message. */
3524 if ((filter_test & FTEST_SYSTEM) != 0)
3526 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3529 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3531 return EXIT_FAILURE;
3535 if ((filter_test & FTEST_USER) != 0)
3537 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3540 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3542 return EXIT_FAILURE;
3546 /* Initialise lookup_list
3547 If debugging, already called above via version reporting.
3548 In either case, we initialise the list of available lookups while running
3549 as root. All dynamically modules are loaded from a directory which is
3550 hard-coded into the binary and is code which, if not a module, would be
3551 part of Exim already. Ability to modify the content of the directory
3552 is equivalent to the ability to modify a setuid binary!
3554 This needs to happen before we read the main configuration. */
3557 /* Read the main runtime configuration data; this gives up if there
3558 is a failure. It leaves the configuration file open so that the subsequent
3559 configuration data for delivery can be read if needed. */
3563 /* Handle the decoding of logging options. */
3565 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3566 log_selector_string, log_options, log_options_count, US"log", 0);
3570 debug_printf("configuration file is %s\n", config_main_filename);
3571 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3572 log_extra_selector);
3575 /* If domain literals are not allowed, check the sender address that was
3576 supplied with -f. Ditto for a stripped trailing dot. */
3578 if (sender_address != NULL)
3580 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3582 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3583 "allowed\n", sender_address);
3584 return EXIT_FAILURE;
3586 if (f_end_dot && !strip_trailing_dot)
3588 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3589 "(trailing dot not allowed)\n", sender_address);
3590 return EXIT_FAILURE;
3594 /* Paranoia check of maximum lengths of certain strings. There is a check
3595 on the length of the log file path in log.c, which will come into effect
3596 if there are any calls to write the log earlier than this. However, if we
3597 get this far but the string is very long, it is better to stop now than to
3598 carry on and (e.g.) receive a message and then have to collapse. The call to
3599 log_write() from here will cause the ultimate panic collapse if the complete
3600 file name exceeds the buffer length. */
3602 if (Ustrlen(log_file_path) > 200)
3603 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3604 "log_file_path is longer than 200 chars: aborting");
3606 if (Ustrlen(pid_file_path) > 200)
3607 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3608 "pid_file_path is longer than 200 chars: aborting");
3610 if (Ustrlen(spool_directory) > 200)
3611 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3612 "spool_directory is longer than 200 chars: aborting");
3614 /* Length check on the process name given to syslog for its TAG field,
3615 which is only permitted to be 32 characters or less. See RFC 3164. */
3617 if (Ustrlen(syslog_processname) > 32)
3618 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3619 "syslog_processname is longer than 32 chars: aborting");
3621 /* In some operating systems, the environment variable TMPDIR controls where
3622 temporary files are created; Exim doesn't use these (apart from when delivering
3623 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3624 If TMPDIR is found in the environment, reset it to the value defined in the
3625 TMPDIR macro, if this macro is defined. */
3630 for (p = USS environ; *p != NULL; p++)
3632 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3633 Ustrcmp(*p+7, TMPDIR) != 0)
3635 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3636 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3638 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3644 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3645 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3646 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3647 called by a user who has set the TZ variable. This then affects the timestamps
3648 in log files and in Received: headers, and any created Date: header lines. The
3649 required timezone is settable in the configuration file, so nothing can be done
3650 about this earlier - but hopefully nothing will normally be logged earlier than
3651 this. We have to make a new environment if TZ is wrong, but don't bother if
3652 timestamps_utc is set, because then all times are in UTC anyway. */
3654 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3656 timestamps_utc = TRUE;
3660 uschar *envtz = US getenv("TZ");
3661 if ((envtz == NULL && timezone_string != NULL) ||
3663 (timezone_string == NULL ||
3664 Ustrcmp(timezone_string, envtz) != 0)))
3666 uschar **p = USS environ;
3670 while (*p++ != NULL) count++;
3671 if (envtz == NULL) count++;
3672 newp = new = malloc(sizeof(uschar *) * (count + 1));
3673 for (p = USS environ; *p != NULL; p++)
3675 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3678 if (timezone_string != NULL)
3680 *newp = malloc(Ustrlen(timezone_string) + 4);
3681 sprintf(CS *newp++, "TZ=%s", timezone_string);
3686 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3687 tod_stamp(tod_log));
3691 /* Handle the case when we have removed the setuid privilege because of -C or
3692 -D. This means that the caller of Exim was not root.
3694 There is a problem if we were running as the Exim user. The sysadmin may
3695 expect this case to retain privilege because "the binary was called by the
3696 Exim user", but it hasn't, because either the -D option set macros, or the
3697 -C option set a non-trusted configuration file. There are two possibilities:
3699 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3700 to do message deliveries. Thus, the fact that it is running as a
3701 non-privileged user is plausible, and might be wanted in some special
3702 configurations. However, really_exim will have been set false when
3703 privilege was dropped, to stop Exim trying to write to its normal log
3704 files. Therefore, re-enable normal log processing, assuming the sysadmin
3705 has set up the log directory correctly.
3707 (2) If deliver_drop_privilege is not set, the configuration won't work as
3708 apparently intended, and so we log a panic message. In order to retain
3709 root for -C or -D, the caller must either be root or be invoking a
3710 trusted configuration file (when deliver_drop_privilege is false). */
3712 if (removed_privilege && (!trusted_config || macros != NULL) &&
3713 real_uid == exim_uid)
3715 if (deliver_drop_privilege)
3716 really_exim = TRUE; /* let logging work normally */
3718 log_write(0, LOG_MAIN|LOG_PANIC,
3719 "exim user lost privilege for using %s option",
3720 trusted_config? "-D" : "-C");
3723 /* Start up Perl interpreter if Perl support is configured and there is a
3724 perl_startup option, and the configuration or the command line specifies
3725 initializing starting. Note that the global variables are actually called
3726 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3729 if (perl_start_option != 0)
3730 opt_perl_at_start = (perl_start_option > 0);
3731 if (opt_perl_at_start && opt_perl_startup != NULL)
3734 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3735 errstr = init_perl(opt_perl_startup);
3738 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3739 return EXIT_FAILURE;
3741 opt_perl_started = TRUE;
3743 #endif /* EXIM_PERL */
3745 /* Log the arguments of the call if the configuration file said so. This is
3746 a debugging feature for finding out what arguments certain MUAs actually use.
3747 Don't attempt it if logging is disabled, or if listing variables or if
3748 verifying/testing addresses or expansions. */
3750 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3751 && really_exim && !list_options && !checking)
3754 uschar *p = big_buffer;
3756 (void)getcwd(CS p+4, big_buffer_size - 4);
3758 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3760 for (i = 0; i < argc; i++)
3762 int len = Ustrlen(argv[i]);
3765 if (p + len + 8 >= big_buffer + big_buffer_size)
3768 log_write(0, LOG_MAIN, "%s", big_buffer);
3769 Ustrcpy(big_buffer, "...");
3772 printing = string_printing(argv[i]);
3773 if (printing[0] == 0) quote = US"\""; else
3775 uschar *pp = printing;
3777 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3779 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3780 (p - big_buffer) - 4), printing, quote);
3784 if ((log_extra_selector & LX_arguments) != 0)
3785 log_write(0, LOG_MAIN, "%s", big_buffer);
3787 debug_printf("%s\n", big_buffer);
3790 /* Set the working directory to be the top-level spool directory. We don't rely
3791 on this in the code, which always uses fully qualified names, but it's useful
3792 for core dumps etc. Don't complain if it fails - the spool directory might not
3793 be generally accessible and calls with the -C option (and others) have lost
3794 privilege by now. Before the chdir, we try to ensure that the directory exists.
3797 if (Uchdir(spool_directory) != 0)
3799 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3800 (void)Uchdir(spool_directory);
3803 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3804 alias file. Exim doesn't have such a concept, but this call is screwed into
3805 Sun's YP makefiles. Handle this by calling a configured script, as the real
3806 user who called Exim. The -oA option can be used to pass an argument to the
3811 (void)fclose(config_file);
3812 if (bi_command != NULL)
3816 argv[i++] = bi_command;
3817 if (alias_arg != NULL) argv[i++] = alias_arg;
3820 setgroups(group_count, group_list);
3821 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3823 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3824 (argv[1] == NULL)? US"" : argv[1]);
3826 execv(CS argv[0], (char *const *)argv);
3827 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3832 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3837 /* If an action on specific messages is requested, or if a daemon or queue
3838 runner is being started, we need to know if Exim was called by an admin user.
3839 This is the case if the real user is root or exim, or if the real group is
3840 exim, or if one of the supplementary groups is exim or a group listed in
3841 admin_groups. We don't fail all message actions immediately if not admin_user,
3842 since some actions can be performed by non-admin users. Instead, set admin_user
3843 for later interrogation. */
3845 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3850 for (i = 0; i < group_count; i++)
3852 if (group_list[i] == exim_gid) admin_user = TRUE;
3853 else if (admin_groups != NULL)
3855 for (j = 1; j <= (int)(admin_groups[0]); j++)
3856 if (admin_groups[j] == group_list[i])
3857 { admin_user = TRUE; break; }
3859 if (admin_user) break;
3863 /* Another group of privileged users are the trusted users. These are root,
3864 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3865 are permitted to specify sender_addresses with -f on the command line, and
3866 other message parameters as well. */
3868 if (real_uid == root_uid || real_uid == exim_uid)
3869 trusted_caller = TRUE;
3874 if (trusted_users != NULL)
3876 for (i = 1; i <= (int)(trusted_users[0]); i++)
3877 if (trusted_users[i] == real_uid)
3878 { trusted_caller = TRUE; break; }
3881 if (!trusted_caller && trusted_groups != NULL)
3883 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3885 if (trusted_groups[i] == real_gid)
3886 trusted_caller = TRUE;
3887 else for (j = 0; j < group_count; j++)
3889 if (trusted_groups[i] == group_list[j])
3890 { trusted_caller = TRUE; break; }
3892 if (trusted_caller) break;
3897 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3898 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3900 /* Only an admin user may start the daemon or force a queue run in the default
3901 configuration, but the queue run restriction can be relaxed. Only an admin
3902 user may request that a message be returned to its sender forthwith. Only an
3903 admin user may specify a debug level greater than D_v (because it might show
3904 passwords, etc. in lookup queries). Only an admin user may request a queue
3905 count. Only an admin user can use the test interface to scan for email
3906 (because Exim will be in the spool dir and able to look at mails). */
3910 BOOL debugset = (debug_selector & ~D_v) != 0;
3911 if (deliver_give_up || daemon_listen || malware_test_file ||
3912 (count_queue && queue_list_requires_admin) ||
3913 (list_queue && queue_list_requires_admin) ||
3914 (queue_interval >= 0 && prod_requires_admin) ||
3915 (debugset && !running_in_test_harness))
3917 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3922 /* If the real user is not root or the exim uid, the argument for passing
3923 in an open TCP/IP connection for another message is not permitted, nor is
3924 running with the -N option for any delivery action, unless this call to exim is
3925 one that supplied an input message, or we are using a patched exim for
3926 regression testing. */
3928 if (real_uid != root_uid && real_uid != exim_uid &&
3929 (continue_hostname != NULL ||
3931 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3932 )) && !running_in_test_harness)
3934 fprintf(stderr, "exim: Permission denied\n");
3935 return EXIT_FAILURE;
3938 /* If the caller is not trusted, certain arguments are ignored when running for
3939 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3940 Note that authority for performing certain actions on messages is tested in the
3941 queue_action() function. */
3943 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3945 sender_host_name = sender_host_address = interface_address =
3946 sender_ident = received_protocol = NULL;
3947 sender_host_port = interface_port = 0;
3948 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3951 /* If a sender host address is set, extract the optional port number off the
3952 end of it and check its syntax. Do the same thing for the interface address.
3953 Exim exits if the syntax is bad. */
3957 if (sender_host_address != NULL)
3958 sender_host_port = check_port(sender_host_address);
3959 if (interface_address != NULL)
3960 interface_port = check_port(interface_address);
3963 /* If an SMTP message is being received check to see if the standard input is a
3964 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3965 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3970 union sockaddr_46 inetd_sock;
3971 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3972 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3974 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3975 if (family == AF_INET || family == AF_INET6)
3977 union sockaddr_46 interface_sock;
3978 size = sizeof(interface_sock);
3980 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3981 interface_address = host_ntoa(-1, &interface_sock, NULL,
3984 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3986 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3989 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3990 NULL, &sender_host_port);
3991 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3992 "inetd is not supported when mua_wrapper is set");
3997 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3998 return EXIT_FAILURE;
4004 /* If the load average is going to be needed while receiving a message, get it
4005 now for those OS that require the first call to os_getloadavg() to be done as
4006 root. There will be further calls later for each message received. */
4008 #ifdef LOAD_AVG_NEEDS_ROOT
4009 if (receiving_message &&
4010 (queue_only_load >= 0 ||
4011 (is_inetd && smtp_load_reserve >= 0)
4014 load_average = OS_GETLOADAVG();
4018 /* The queue_only configuration option can be overridden by -odx on the command
4019 line, except that if queue_only_override is false, queue_only cannot be unset
4020 from the command line. */
4022 if (queue_only_set && (queue_only_override || arg_queue_only))
4023 queue_only = arg_queue_only;
4025 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4028 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4029 if (arg_smtp_receive_timeout >= 0)
4030 smtp_receive_timeout = arg_smtp_receive_timeout;
4032 /* If Exim was started with root privilege, unless we have already removed the
4033 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4034 except when starting the daemon or doing some kind of delivery or address
4035 testing (-bt). These are the only cases when root need to be retained. We run
4036 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4037 retained only for starting the daemon. We always do the initgroups() in this
4038 situation (controlled by the TRUE below), in order to be as close as possible
4039 to the state Exim usually runs in. */
4041 if (!unprivileged && /* originally had root AND */
4042 !removed_privilege && /* still got root AND */
4043 !daemon_listen && /* not starting the daemon */
4044 queue_interval <= 0 && /* (either kind of daemon) */
4046 deliver_drop_privilege || /* requested unprivileged */
4048 queue_interval < 0 && /* not running the queue */
4049 (msg_action_arg < 0 || /* and */
4050 msg_action != MSG_DELIVER) && /* not delivering and */
4051 (!checking || !address_test_mode) /* not address checking */
4055 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4058 /* When we are retaining a privileged uid, we still change to the exim gid. */
4063 rv = setgid(exim_gid);
4064 /* Impact of failure is that some stuff might end up with an incorrect group.
4065 We track this for failures from root, since any attempt to change privilege
4066 by root should succeed and failures should be examined. For non-root,
4067 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4068 no need to complain then. */
4071 if (!(unprivileged || removed_privilege))
4074 "exim: changing group failed: %s\n", strerror(errno));
4078 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4079 (long int)exim_gid, strerror(errno));
4083 /* Handle a request to scan a file for malware */
4084 if (malware_test_file)
4086 #ifdef WITH_CONTENT_SCAN
4088 set_process_info("scanning file for malware");
4089 result = malware_in_file(malware_test_file);
4092 printf("No malware found.\n");
4097 printf("Malware lookup returned non-okay/fail: %d\n", result);
4101 printf("Malware found: %s\n", malware_name);
4103 printf("Malware scan detected malware of unknown name.\n");
4105 printf("Malware scanning not enabled at compile time.\n");
4110 /* Handle a request to list the delivery queue */
4114 set_process_info("listing the queue");
4115 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4119 /* Handle a request to count the delivery queue */
4123 set_process_info("counting the queue");
4128 /* Handle actions on specific messages, except for the force delivery and
4129 message load actions, which are done below. Some actions take a whole list of
4130 message ids, which are known to continue up to the end of the arguments. Others
4131 take a single message id and then operate on the recipients list. */
4133 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4135 int yield = EXIT_SUCCESS;
4136 set_process_info("acting on specified messages");
4138 if (!one_msg_action)
4140 for (i = msg_action_arg; i < argc; i++)
4141 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4142 yield = EXIT_FAILURE;
4145 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4146 recipients_arg)) yield = EXIT_FAILURE;
4150 /* All the modes below here require the remaining configuration sections
4151 to be read, except that we can skip over the ACL setting when delivering
4152 specific messages, or doing a queue run. (For various testing cases we could
4153 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4156 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4158 /* The configuration data will have been read into POOL_PERM because we won't
4159 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4160 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4161 configuration were read into POOL_MAIN, because we don't do any resets till
4162 later on. However, it seems right, and it does ensure that both pools get used.
4165 store_pool = POOL_MAIN;
4167 /* Handle the -brt option. This is for checking out retry configurations.
4168 The next three arguments are a domain name or a complete address, and
4169 optionally two error numbers. All it does is to call the function that
4170 scans the retry configuration data. */
4172 if (test_retry_arg >= 0)
4174 retry_config *yield;
4175 int basic_errno = 0;
4179 if (test_retry_arg >= argc)
4181 printf("-brt needs a domain or address argument\n");
4182 exim_exit(EXIT_FAILURE);
4184 s1 = argv[test_retry_arg++];
4187 /* If the first argument contains no @ and no . it might be a local user
4188 or it might be a single-component name. Treat as a domain. */
4190 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4192 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4193 "being \ntreated as a one-component domain, not as a local part.\n\n",
4197 /* There may be an optional second domain arg. */
4199 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4200 s2 = argv[test_retry_arg++];
4202 /* The final arg is an error name */
4204 if (test_retry_arg < argc)
4206 uschar *ss = argv[test_retry_arg];
4208 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4211 printf("%s\n", CS error);
4212 return EXIT_FAILURE;
4215 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4216 code > 100 as an error is for matching codes to the decade. Turn them into
4217 a real error code, off the decade. */
4219 if (basic_errno == ERRNO_MAIL4XX ||
4220 basic_errno == ERRNO_RCPT4XX ||
4221 basic_errno == ERRNO_DATA4XX)
4223 int code = (more_errno >> 8) & 255;
4225 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4226 else if (code > 100)
4227 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4231 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4232 if (yield == NULL) printf("No retry information found\n"); else
4235 more_errno = yield->more_errno;
4236 printf("Retry rule: %s ", yield->pattern);
4238 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4240 printf("quota%s%s ",
4241 (more_errno > 0)? "_" : "",
4242 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4244 else if (yield->basic_errno == ECONNREFUSED)
4246 printf("refused%s%s ",
4247 (more_errno > 0)? "_" : "",
4248 (more_errno == 'M')? "MX" :
4249 (more_errno == 'A')? "A" : "");
4251 else if (yield->basic_errno == ETIMEDOUT)
4254 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4256 if (more_errno != 0) printf("_%s",
4257 (more_errno == 'M')? "MX" : "A");
4260 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4261 printf("auth_failed ");
4264 for (r = yield->rules; r != NULL; r = r->next)
4266 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4267 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4273 printf(",%d.", x/1000);
4287 exim_exit(EXIT_SUCCESS);
4290 /* Handle a request to list one or more configuration options */
4294 set_process_info("listing variables");
4295 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4296 else for (i = recipients_arg; i < argc; i++)
4299 (Ustrcmp(argv[i], "router") == 0 ||
4300 Ustrcmp(argv[i], "transport") == 0 ||
4301 Ustrcmp(argv[i], "authenticator") == 0 ||
4302 Ustrcmp(argv[i], "macro") == 0))
4304 readconf_print(argv[i+1], argv[i]);
4307 else readconf_print(argv[i], NULL);
4309 exim_exit(EXIT_SUCCESS);
4313 /* Handle a request to deliver one or more messages that are already on the
4314 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4315 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4317 Delivery of specific messages is typically used for a small number when
4318 prodding by hand (when the option forced_delivery will be set) or when
4319 re-execing to regain root privilege. Each message delivery must happen in a
4320 separate process, so we fork a process for each one, and run them sequentially
4321 so that debugging output doesn't get intertwined, and to avoid spawning too
4322 many processes if a long list is given. However, don't fork for the last one;
4323 this saves a process in the common case when Exim is called to deliver just one
4326 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4328 if (prod_requires_admin && !admin_user)
4330 fprintf(stderr, "exim: Permission denied\n");
4331 exim_exit(EXIT_FAILURE);
4333 set_process_info("delivering specified messages");
4334 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4335 for (i = msg_action_arg; i < argc; i++)
4340 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4341 else if ((pid = fork()) == 0)
4343 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4344 _exit(EXIT_SUCCESS);
4348 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4350 exim_exit(EXIT_FAILURE);
4354 exim_exit(EXIT_SUCCESS);
4358 /* If only a single queue run is requested, without SMTP listening, we can just
4359 turn into a queue runner, with an optional starting message id. */
4361 if (queue_interval == 0 && !daemon_listen)
4363 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4364 (start_queue_run_id == NULL)? US"" : US" starting at ",
4365 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4366 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4367 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4368 set_process_info("running the queue (single queue run)");
4369 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4370 exim_exit(EXIT_SUCCESS);
4374 /* Find the login name of the real user running this process. This is always
4375 needed when receiving a message, because it is written into the spool file. It
4376 may also be used to construct a from: or a sender: header, and in this case we
4377 need the user's full name as well, so save a copy of it, checked for RFC822
4378 syntax and munged if necessary, if it hasn't previously been set by the -F
4379 argument. We may try to get the passwd entry more than once, in case NIS or
4380 other delays are in evidence. Save the home directory for use in filter testing
4385 if ((pw = getpwuid(real_uid)) != NULL)
4387 originator_login = string_copy(US pw->pw_name);
4388 originator_home = string_copy(US pw->pw_dir);
4390 /* If user name has not been set by -F, set it from the passwd entry
4391 unless -f has been used to set the sender address by a trusted user. */
4393 if (originator_name == NULL)
4395 if (sender_address == NULL ||
4396 (!trusted_caller && filter_test == FTEST_NONE))
4398 uschar *name = US pw->pw_gecos;
4399 uschar *amp = Ustrchr(name, '&');
4402 /* Most Unix specify that a '&' character in the gecos field is
4403 replaced by a copy of the login name, and some even specify that
4404 the first character should be upper cased, so that's what we do. */
4409 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4410 amp - name, name, &loffset, originator_login, amp + 1);
4411 buffer[loffset] = toupper(buffer[loffset]);
4415 /* If a pattern for matching the gecos field was supplied, apply
4416 it and then expand the name string. */
4418 if (gecos_pattern != NULL && gecos_name != NULL)
4421 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4423 if (regex_match_and_setup(re, name, 0, -1))
4425 uschar *new_name = expand_string(gecos_name);
4427 if (new_name != NULL)
4429 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4430 "gecos field \"%s\"\n", new_name, name);
4433 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4434 "\"%s\": %s\n", gecos_name, expand_string_message);
4436 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4437 "gecos field \"%s\"\n", gecos_pattern, name);
4438 store_free((void *)re);
4440 originator_name = string_copy(name);
4443 /* A trusted caller has used -f but not -F */
4445 else originator_name = US"";
4448 /* Break the retry loop */
4453 if (++i > finduser_retries) break;
4457 /* If we cannot get a user login, log the incident and give up, unless the
4458 configuration specifies something to use. When running in the test harness,
4459 any setting of unknown_login overrides the actual name. */
4461 if (originator_login == NULL || running_in_test_harness)
4463 if (unknown_login != NULL)
4465 originator_login = expand_string(unknown_login);
4466 if (originator_name == NULL && unknown_username != NULL)
4467 originator_name = expand_string(unknown_username);
4468 if (originator_name == NULL) originator_name = US"";
4470 if (originator_login == NULL)
4471 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4475 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4478 originator_name = string_copy(parse_fix_phrase(originator_name,
4479 Ustrlen(originator_name), big_buffer, big_buffer_size));
4481 /* If a message is created by this call of Exim, the uid/gid of its originator
4482 are those of the caller. These values are overridden if an existing message is
4483 read in from the spool. */
4485 originator_uid = real_uid;
4486 originator_gid = real_gid;
4488 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4489 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4491 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4492 returns. We leave this till here so that the originator_ fields are available
4493 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4496 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4500 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4501 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4502 "mua_wrapper is set");
4507 /* If the sender ident has not been set (by a trusted caller) set it to
4508 the caller. This will get overwritten below for an inetd call. If a trusted
4509 caller has set it empty, unset it. */
4511 if (sender_ident == NULL) sender_ident = originator_login;
4512 else if (sender_ident[0] == 0) sender_ident = NULL;
4514 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4515 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4516 originator_* variables set. */
4518 if (test_rewrite_arg >= 0)
4520 really_exim = FALSE;
4521 if (test_rewrite_arg >= argc)
4523 printf("-brw needs an address argument\n");
4524 exim_exit(EXIT_FAILURE);
4526 rewrite_test(argv[test_rewrite_arg]);
4527 exim_exit(EXIT_SUCCESS);
4530 /* A locally-supplied message is considered to be coming from a local user
4531 unless a trusted caller supplies a sender address with -f, or is passing in the
4532 message via SMTP (inetd invocation or otherwise). */
4534 if ((sender_address == NULL && !smtp_input) ||
4535 (!trusted_caller && filter_test == FTEST_NONE))
4537 sender_local = TRUE;
4539 /* A trusted caller can supply authenticated_sender and authenticated_id
4540 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4541 defaults except when host checking. */
4543 if (authenticated_sender == NULL && !host_checking)
4544 authenticated_sender = string_sprintf("%s@%s", originator_login,
4545 qualify_domain_sender);
4546 if (authenticated_id == NULL && !host_checking)
4547 authenticated_id = originator_login;
4550 /* Trusted callers are always permitted to specify the sender address.
4551 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4552 is specified is the empty address. However, if a trusted caller does not
4553 specify a sender address for SMTP input, we leave sender_address unset. This
4554 causes the MAIL commands to be honoured. */
4556 if ((!smtp_input && sender_address == NULL) ||
4557 !receive_check_set_sender(sender_address))
4559 /* Either the caller is not permitted to set a general sender, or this is
4560 non-SMTP input and the trusted caller has not set a sender. If there is no
4561 sender, or if a sender other than <> is set, override with the originator's
4562 login (which will get qualified below), except when checking things. */
4564 if (sender_address == NULL /* No sender_address set */
4566 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4567 !checking && /* Not running tests, AND */
4568 filter_test == FTEST_NONE)) /* Not testing a filter */
4570 sender_address = originator_login;
4571 sender_address_forced = FALSE;
4572 sender_address_domain = 0;
4576 /* Remember whether an untrusted caller set the sender address */
4578 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4580 /* Ensure that the sender address is fully qualified unless it is the empty
4581 address, which indicates an error message, or doesn't exist (root caller, smtp
4582 interface, no -f argument). */
4584 if (sender_address != NULL && sender_address[0] != 0 &&
4585 sender_address_domain == 0)
4586 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4587 qualify_domain_sender);
4589 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4591 /* Handle a request to verify a list of addresses, or test them for delivery.
4592 This must follow the setting of the sender address, since routers can be
4593 predicated upon the sender. If no arguments are given, read addresses from
4594 stdin. Set debug_level to at least D_v to get full output for address testing.
4597 if (verify_address_mode || address_test_mode)
4600 int flags = vopt_qualify;
4602 if (verify_address_mode)
4604 if (!verify_as_sender) flags |= vopt_is_recipient;
4605 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4610 flags |= vopt_is_recipient;
4611 debug_selector |= D_v;
4612 debug_file = stderr;
4613 debug_fd = fileno(debug_file);
4614 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4617 if (recipients_arg < argc)
4619 while (recipients_arg < argc)
4621 uschar *s = argv[recipients_arg++];
4624 BOOL finished = FALSE;
4625 uschar *ss = parse_find_address_end(s, FALSE);
4626 if (*ss == ',') *ss = 0; else finished = TRUE;
4627 test_address(s, flags, &exit_value);
4630 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4637 uschar *s = get_stdinput(NULL, NULL);
4638 if (s == NULL) break;
4639 test_address(s, flags, &exit_value);
4643 exim_exit(exit_value);
4646 /* Handle expansion checking. Either expand items on the command line, or read
4647 from stdin if there aren't any. If -Mset was specified, load the message so
4648 that its variables can be used, but restrict this facility to admin users.
4649 Otherwise, if -bem was used, read a message from stdin. */
4653 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4655 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4658 fprintf(stderr, "exim: permission denied\n");
4661 message_id = argv[msg_action_arg];
4662 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4663 if (!spool_open_datafile(message_id))
4664 printf ("Failed to load message datafile %s\n", message_id);
4665 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4666 printf ("Failed to load message %s\n", message_id);
4669 /* Read a test message from a file. We fudge it up to be on stdin, saving
4670 stdin itself for later reading of expansion strings. */
4672 else if (expansion_test_message != NULL)
4674 int save_stdin = dup(0);
4675 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4678 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4680 return EXIT_FAILURE;
4683 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4684 message_ended = END_NOTENDED;
4685 read_message_body(receive_msg(extract_recipients));
4686 message_linecount += body_linecount;
4687 (void)dup2(save_stdin, 0);
4688 (void)close(save_stdin);
4689 clearerr(stdin); /* Required by Darwin */
4692 /* Allow $recipients for this testing */
4694 enable_dollar_recipients = TRUE;
4696 /* Expand command line items */
4698 if (recipients_arg < argc)
4700 while (recipients_arg < argc)
4702 uschar *s = argv[recipients_arg++];
4703 uschar *ss = expand_string(s);
4704 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4705 else printf("%s\n", CS ss);
4713 char *(*fn_readline)(const char *) = NULL;
4714 void (*fn_addhist)(const char *) = NULL;
4717 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4723 uschar *source = get_stdinput(fn_readline, fn_addhist);
4724 if (source == NULL) break;
4725 ss = expand_string(source);
4727 printf ("Failed: %s\n", expand_string_message);
4728 else printf("%s\n", CS ss);
4732 if (dlhandle != NULL) dlclose(dlhandle);
4736 /* The data file will be open after -Mset */
4738 if (deliver_datafile >= 0)
4740 (void)close(deliver_datafile);
4741 deliver_datafile = -1;
4744 exim_exit(EXIT_SUCCESS);
4748 /* The active host name is normally the primary host name, but it can be varied
4749 for hosts that want to play several parts at once. We need to ensure that it is
4750 set for host checking, and for receiving messages. */
4752 smtp_active_hostname = primary_hostname;
4753 if (raw_active_hostname != NULL)
4755 uschar *nah = expand_string(raw_active_hostname);
4758 if (!expand_string_forcedfail)
4759 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4760 "(smtp_active_hostname): %s", raw_active_hostname,
4761 expand_string_message);
4763 else if (nah[0] != 0) smtp_active_hostname = nah;
4766 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4767 given IP address so that the blocking and relay configuration can be tested.
4768 Unless a sender_ident was set by -oMt, we discard it (the default is the
4769 caller's login name). An RFC 1413 call is made only if we are running in the
4770 test harness and an incoming interface and both ports are specified, because
4771 there is no TCP/IP call to find the ident for. */
4778 if (!sender_ident_set)
4780 sender_ident = NULL;
4781 if (running_in_test_harness && sender_host_port != 0 &&
4782 interface_address != NULL && interface_port != 0)
4783 verify_get_ident(1413);
4786 /* In case the given address is a non-canonical IPv6 address, canonicize
4787 it. The code works for both IPv4 and IPv6, as it happens. */
4789 size = host_aton(sender_host_address, x);
4790 sender_host_address = store_get(48); /* large enough for full IPv6 */
4791 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4793 /* Now set up for testing */
4795 host_build_sender_fullhost();
4799 sender_local = FALSE;
4800 sender_host_notsocket = TRUE;
4801 debug_file = stderr;
4802 debug_fd = fileno(debug_file);
4803 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4804 "**** but without any ident (RFC 1413) callback.\n"
4805 "**** This is not for real!\n\n",
4806 sender_host_address);
4808 if (verify_check_host(&hosts_connection_nolog) == OK)
4809 log_write_selector &= ~L_smtp_connection;
4810 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4812 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4813 because a log line has already been written for all its failure exists
4814 (usually "connection refused: <reason>") and writing another one is
4815 unnecessary clutter. */
4817 if (smtp_start_session())
4819 reset_point = store_get(0);
4822 store_reset(reset_point);
4823 if (smtp_setup_msg() <= 0) break;
4824 if (!receive_msg(FALSE)) break;
4828 exim_exit(EXIT_SUCCESS);
4832 /* Arrange for message reception if recipients or SMTP were specified;
4833 otherwise complain unless a version print (-bV) happened or this is a filter
4834 verification test or info dump.
4835 In the former case, show the configuration file name. */
4837 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4839 if (version_printed)
4841 printf("Configuration file is %s\n", config_main_filename);
4842 return EXIT_SUCCESS;
4845 if (info_flag != CMDINFO_NONE)
4847 show_exim_information(info_flag, info_stdout ? stdout : stderr);
4848 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
4851 if (filter_test == FTEST_NONE)
4852 exim_usage(called_as);
4856 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4857 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4858 that we are not called from inetd, because that is rejected above. The
4859 following configuration settings are forced here:
4861 (1) Synchronous delivery (-odi)
4862 (2) Errors to stderr (-oep == -oeq)
4863 (3) No parallel remote delivery
4864 (4) Unprivileged delivery
4866 We don't force overall queueing options because there are several of them;
4867 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4868 to override any SMTP queueing. */
4872 synchronous_delivery = TRUE;
4873 arg_error_handling = ERRORS_STDERR;
4874 remote_max_parallel = 1;
4875 deliver_drop_privilege = TRUE;
4877 queue_smtp_domains = NULL;
4881 /* Prepare to accept one or more new messages on the standard input. When a
4882 message has been read, its id is returned in message_id[]. If doing immediate
4883 delivery, we fork a delivery process for each received message, except for the
4884 last one, where we can save a process switch.
4886 It is only in non-smtp mode that error_handling is allowed to be changed from
4887 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4888 sendmail error modes other than -oem ever actually used? Later: yes.) */
4890 if (!smtp_input) error_handling = arg_error_handling;
4892 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4893 logging being sent down the socket and make an identd call to get the
4898 (void)fclose(stderr);
4899 exim_nullstd(); /* Re-open to /dev/null */
4900 verify_get_ident(IDENT_PORT);
4901 host_build_sender_fullhost();
4902 set_process_info("handling incoming connection from %s via inetd",
4906 /* If the sender host address has been set, build sender_fullhost if it hasn't
4907 already been done (which it will have been for inetd). This caters for the
4908 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4909 so that the test for IP options is skipped for -bs input. */
4911 if (sender_host_address != NULL && sender_fullhost == NULL)
4913 host_build_sender_fullhost();
4914 set_process_info("handling incoming connection from %s via -oMa",
4916 sender_host_notsocket = TRUE;
4919 /* Otherwise, set the sender host as unknown except for inetd calls. This
4920 prevents host checking in the case of -bs not from inetd and also for -bS. */
4922 else if (!is_inetd) sender_host_unknown = TRUE;
4924 /* If stdout does not exist, then dup stdin to stdout. This can happen
4925 if exim is started from inetd. In this case fd 0 will be set to the socket,
4926 but fd 1 will not be set. This also happens for passed SMTP channels. */
4928 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4930 /* Set up the incoming protocol name and the state of the program. Root is
4931 allowed to force received protocol via the -oMr option above. If we have come
4932 via inetd, the process info has already been set up. We don't set
4933 received_protocol here for smtp input, as it varies according to
4934 batch/HELO/EHLO/AUTH/TLS. */
4938 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4939 smtp_batched_input? "batched " : "",
4940 (sender_address!= NULL)? sender_address : originator_login);
4944 if (received_protocol == NULL)
4945 received_protocol = string_sprintf("local%s", called_as);
4946 set_process_info("accepting a local non-SMTP message from <%s>",
4950 /* Initialize the session_local_queue-only flag (this will be ignored if
4951 mua_wrapper is set) */
4954 session_local_queue_only = queue_only;
4956 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4957 the spool if so configured. On failure, we must not attempt to send an error
4958 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4959 error code is given.) */
4961 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4963 fprintf(stderr, "exim: insufficient disk space\n");
4964 return EXIT_FAILURE;
4967 /* If this is smtp input of any kind, real or batched, handle the start of the
4970 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4971 because a log line has already been written for all its failure exists
4972 (usually "connection refused: <reason>") and writing another one is
4973 unnecessary clutter. */
4979 if (verify_check_host(&hosts_connection_nolog) == OK)
4980 log_write_selector &= ~L_smtp_connection;
4981 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4982 if (!smtp_start_session())
4985 exim_exit(EXIT_SUCCESS);
4989 /* Otherwise, set up the input size limit here. */
4993 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4994 if (expand_string_message != NULL)
4996 if (thismessage_size_limit == -1)
4997 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4998 "message_size_limit: %s", expand_string_message);
5000 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5001 "message_size_limit: %s", expand_string_message);
5005 /* Loop for several messages when reading SMTP input. If we fork any child
5006 processes, we don't want to wait for them unless synchronous delivery is
5007 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5008 same as SIG_DFL, despite the fact that documentation often lists the default as
5009 "ignore". This is a confusing area. This is what I know:
5011 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5012 processes that complete simply to go away without ever becoming defunct. You
5013 can't then wait for them - but we don't want to wait for them in the
5014 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5015 happen for all OS (e.g. *BSD is different).
5017 But that's not the end of the story. Some (many? all?) systems have the
5018 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5019 has by default, so it seems that the difference is merely one of default
5020 (compare restarting vs non-restarting signals).
5022 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5023 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5024 of the loop below. Paranoia rules.
5026 February 2003: That's *still* not the end of the story. There are now versions
5027 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5028 process then calls waitpid(), a grumble is written to the system log, because
5029 this is logically inconsistent. In other words, it doesn't like the paranoia.
5030 As a consequenc of this, the waitpid() below is now excluded if we are sure
5031 that SIG_IGN works. */
5033 if (!synchronous_delivery)
5036 struct sigaction act;
5037 act.sa_handler = SIG_IGN;
5038 sigemptyset(&(act.sa_mask));
5039 act.sa_flags = SA_NOCLDWAIT;
5040 sigaction(SIGCHLD, &act, NULL);
5042 signal(SIGCHLD, SIG_IGN);
5046 /* Save the current store pool point, for resetting at the start of
5047 each message, and save the real sender address, if any. */
5049 reset_point = store_get(0);
5050 real_sender_address = sender_address;
5052 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5053 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5058 store_reset(reset_point);
5061 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5062 input and build the recipients list, before calling receive_msg() to read the
5063 message proper. Whatever sender address is given in the SMTP transaction is
5064 often ignored for local senders - we use the actual sender, which is normally
5065 either the underlying user running this process or a -f argument provided by
5066 a trusted caller. It is saved in real_sender_address. The test for whether to
5067 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5072 if ((rc = smtp_setup_msg()) > 0)
5074 if (real_sender_address != NULL &&
5075 !receive_check_set_sender(sender_address))
5077 sender_address = raw_sender = real_sender_address;
5078 sender_address_unrewritten = NULL;
5081 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5082 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5083 the very end. The result of the ACL is ignored (as for other non-SMTP
5084 messages). It is run for its potential side effects. */
5086 if (smtp_batched_input && acl_not_smtp_start != NULL)
5088 uschar *user_msg, *log_msg;
5089 enable_dollar_recipients = TRUE;
5090 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5091 &user_msg, &log_msg);
5092 enable_dollar_recipients = FALSE;
5095 /* Now get the data for the message */
5097 more = receive_msg(extract_recipients);
5098 if (message_id[0] == 0)
5101 smtp_log_no_mail(); /* Log no mail if configured */
5102 exim_exit(EXIT_FAILURE);
5107 smtp_log_no_mail(); /* Log no mail if configured */
5108 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5112 /* In the non-SMTP case, we have all the information from the command
5113 line, but must process it in case it is in the more general RFC822
5114 format, and in any case, to detect syntax errors. Also, it appears that
5115 the use of comma-separated lists as single arguments is common, so we
5116 had better support them. */
5122 int count = argc - recipients_arg;
5123 uschar **list = argv + recipients_arg;
5125 /* These options cannot be changed dynamically for non-SMTP messages */
5127 active_local_sender_retain = local_sender_retain;
5128 active_local_from_check = local_from_check;
5130 /* Save before any rewriting */
5132 raw_sender = string_copy(sender_address);
5134 /* Loop for each argument */
5136 for (i = 0; i < count; i++)
5138 int start, end, domain;
5140 uschar *s = list[i];
5142 /* Loop for each comma-separated address */
5146 BOOL finished = FALSE;
5148 uschar *ss = parse_find_address_end(s, FALSE);
5150 if (*ss == ',') *ss = 0; else finished = TRUE;
5152 /* Check max recipients - if -t was used, these aren't recipients */
5154 if (recipients_max > 0 && ++rcount > recipients_max &&
5155 !extract_recipients)
5157 if (error_handling == ERRORS_STDERR)
5159 fprintf(stderr, "exim: too many recipients\n");
5160 exim_exit(EXIT_FAILURE);
5165 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5166 errors_sender_rc : EXIT_FAILURE;
5171 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5173 if (domain == 0 && !allow_unqualified_recipient)
5176 errmess = US"unqualified recipient address not allowed";
5179 if (recipient == NULL)
5181 if (error_handling == ERRORS_STDERR)
5183 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5184 string_printing(list[i]), errmess);
5185 exim_exit(EXIT_FAILURE);
5191 eblock.text1 = string_printing(list[i]);
5192 eblock.text2 = errmess;
5194 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5195 errors_sender_rc : EXIT_FAILURE;
5199 receive_add_recipient(recipient, -1);
5202 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5206 /* Show the recipients when debugging */
5211 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5212 if (recipients_list != NULL)
5214 debug_printf("Recipients:\n");
5215 for (i = 0; i < recipients_count; i++)
5216 debug_printf(" %s\n", recipients_list[i].address);
5220 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5221 ignored; rejecting here would just add complication, and it can just as
5222 well be done later. Allow $recipients to be visible in the ACL. */
5224 if (acl_not_smtp_start != NULL)
5226 uschar *user_msg, *log_msg;
5227 enable_dollar_recipients = TRUE;
5228 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5229 &user_msg, &log_msg);
5230 enable_dollar_recipients = FALSE;
5233 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5234 will just read the headers for the message, and not write anything onto the
5237 message_ended = END_NOTENDED;
5238 more = receive_msg(extract_recipients);
5240 /* more is always FALSE here (not SMTP message) when reading a message
5241 for real; when reading the headers of a message for filter testing,
5242 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5244 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5245 } /* Non-SMTP message reception */
5247 /* If this is a filter testing run, there are headers in store, but
5248 no message on the spool. Run the filtering code in testing mode, setting
5249 the domain to the qualify domain and the local part to the current user,
5250 unless they have been set by options. The prefix and suffix are left unset
5251 unless specified. The the return path is set to to the sender unless it has
5252 already been set from a return-path header in the message. */
5254 if (filter_test != FTEST_NONE)
5256 deliver_domain = (ftest_domain != NULL)?
5257 ftest_domain : qualify_domain_recipient;
5258 deliver_domain_orig = deliver_domain;
5259 deliver_localpart = (ftest_localpart != NULL)?
5260 ftest_localpart : originator_login;
5261 deliver_localpart_orig = deliver_localpart;
5262 deliver_localpart_prefix = ftest_prefix;
5263 deliver_localpart_suffix = ftest_suffix;
5264 deliver_home = originator_home;
5266 if (return_path == NULL)
5268 printf("Return-path copied from sender\n");
5269 return_path = string_copy(sender_address);
5273 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5275 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5277 receive_add_recipient(
5278 string_sprintf("%s%s%s@%s",
5279 (ftest_prefix == NULL)? US"" : ftest_prefix,
5281 (ftest_suffix == NULL)? US"" : ftest_suffix,
5282 deliver_domain), -1);
5284 printf("Recipient = %s\n", recipients_list[0].address);
5285 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5286 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5288 (void)chdir("/"); /* Get away from wherever the user is running this from */
5290 /* Now we run either a system filter test, or a user filter test, or both.
5291 In the latter case, headers added by the system filter will persist and be
5292 available to the user filter. We need to copy the filter variables
5295 if ((filter_test & FTEST_SYSTEM) != 0)
5297 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5298 exim_exit(EXIT_FAILURE);
5301 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5303 if ((filter_test & FTEST_USER) != 0)
5305 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5306 exim_exit(EXIT_FAILURE);
5309 exim_exit(EXIT_SUCCESS);
5312 /* Else act on the result of message reception. We should not get here unless
5313 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5314 will be TRUE. If it is not, check on the number of messages received in this
5317 if (!session_local_queue_only &&
5318 smtp_accept_queue_per_connection > 0 &&
5319 receive_messagecount > smtp_accept_queue_per_connection)
5321 session_local_queue_only = TRUE;
5322 queue_only_reason = 2;
5325 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5326 and queue_only_load is set, check that the load average is below it. If it is
5327 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5328 default), we put the whole session into queue_only mode. It then remains this
5329 way for any subsequent messages on the same SMTP connection. This is a
5330 deliberate choice; even though the load average may fall, it doesn't seem
5331 right to deliver later messages on the same call when not delivering earlier
5332 ones. However, there are odd cases where this is not wanted, so this can be
5333 changed by setting queue_only_load_latch false. */
5335 local_queue_only = session_local_queue_only;
5336 if (!local_queue_only && queue_only_load >= 0)
5338 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5339 if (local_queue_only)
5341 queue_only_reason = 3;
5342 if (queue_only_load_latch) session_local_queue_only = TRUE;
5346 /* If running as an MUA wrapper, all queueing options and freezing options
5350 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5352 /* Log the queueing here, when it will get a message id attached, but
5353 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5356 if (local_queue_only) switch(queue_only_reason)
5359 log_write(L_delay_delivery,
5360 LOG_MAIN, "no immediate delivery: more than %d messages "
5361 "received in one connection", smtp_accept_queue_per_connection);
5365 log_write(L_delay_delivery,
5366 LOG_MAIN, "no immediate delivery: load average %.2f",
5367 (double)load_average/1000.0);
5371 /* Else do the delivery unless the ACL or local_scan() called for queue only
5372 or froze the message. Always deliver in a separate process. A fork failure is
5373 not a disaster, as the delivery will eventually happen on a subsequent queue
5374 run. The search cache must be tidied before the fork, as the parent will
5375 do it before exiting. The child will trigger a lookup failure and
5376 thereby defer the delivery if it tries to use (for example) a cached ldap
5377 connection that the parent has called unbind on. */
5379 else if (!queue_only_policy && !deliver_freeze)
5384 if ((pid = fork()) == 0)
5387 close_unwanted(); /* Close unwanted file descriptors and TLS */
5388 exim_nullstd(); /* Ensure std{in,out,err} exist */
5390 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5391 mode, deliver_drop_privilege is forced TRUE). */
5393 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5395 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5397 /* Control does not return here. */
5400 /* No need to re-exec */
5402 rc = deliver_message(message_id, FALSE, FALSE);
5404 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5405 EXIT_SUCCESS : EXIT_FAILURE);
5410 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5411 "process: %s", strerror(errno));
5414 /* In the parent, wait if synchronous delivery is required. This will
5415 always be the case in MUA wrapper mode. */
5417 else if (synchronous_delivery)
5420 while (wait(&status) != pid);
5421 if ((status & 0x00ff) != 0)
5422 log_write(0, LOG_MAIN|LOG_PANIC,
5423 "process %d crashed with signal %d while delivering %s",
5424 (int)pid, status & 0x00ff, message_id);
5425 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5429 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5430 automatically reaps children (see comments above the loop), clear away any
5431 finished subprocesses here, in case there are lots of messages coming in
5432 from the same source. */
5434 #ifndef SIG_IGN_WORKS
5435 while (waitpid(-1, NULL, WNOHANG) > 0);
5439 exim_exit(EXIT_SUCCESS); /* Never returns */
5440 return 0; /* To stop compiler warning */