1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2009 */
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 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 int options = PCRE_COPT;
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
123 if (n == 0) n = EXPAND_MAXN + 1;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
141 /*************************************************
142 * Set up processing details *
143 *************************************************/
145 /* Save a text string for dumping when SIGUSR1 is received.
146 Do checks for overruns.
148 Arguments: format and arguments, as for printf()
153 set_process_info(const char *format, ...)
157 sprintf(CS process_info, "%5d ", (int)getpid());
158 len = Ustrlen(process_info);
159 va_start(ap, format);
160 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
161 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
162 len = Ustrlen(process_info);
163 process_info[len+0] = '\n';
164 process_info[len+1] = '\0';
165 process_info_len = len + 1;
166 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
173 /*************************************************
174 * Handler for SIGUSR1 *
175 *************************************************/
177 /* SIGUSR1 causes any exim process to write to the process log details of
178 what it is currently doing. It will only be used if the OS is capable of
179 setting up a handler that causes automatic restarting of any system call
180 that is in progress at the time.
182 This function takes care to be signal-safe.
184 Argument: the signal number (SIGUSR1)
189 usr1_handler(int sig)
193 os_restarting_signal(sig, usr1_handler);
195 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
198 /* If we are already running as the Exim user, try to create it in the
199 current process (assuming spool_directory exists). Otherwise, if we are
200 root, do the creation in an exim:exim subprocess. */
202 int euid = geteuid();
203 if (euid == exim_uid)
204 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
205 else if (euid == root_uid)
206 fd = log_create_as_exim(process_log_path);
209 /* If we are neither exim nor root, or if we failed to create the log file,
210 give up. There is not much useful we can do with errors, since we don't want
211 to disrupt whatever is going on outside the signal handler. */
215 (void)write(fd, process_info, process_info_len);
221 /*************************************************
223 *************************************************/
225 /* This handler is enabled most of the time that Exim is running. The handler
226 doesn't actually get used unless alarm() has been called to set a timer, to
227 place a time limit on a system call of some kind. When the handler is run, it
230 There are some other SIGALRM handlers that are used in special cases when more
231 than just a flag setting is required; for example, when reading a message's
232 input. These are normally set up in the code module that uses them, and the
233 SIGALRM handler is reset to this one afterwards.
235 Argument: the signal value (SIGALRM)
240 sigalrm_handler(int sig)
242 sig = sig; /* Keep picky compilers happy */
244 os_non_restarting_signal(SIGALRM, sigalrm_handler);
249 /*************************************************
250 * Sleep for a fractional time interval *
251 *************************************************/
253 /* This function is called by millisleep() and exim_wait_tick() to wait for a
254 period of time that may include a fraction of a second. The coding is somewhat
255 tedious. We do not expect setitimer() ever to fail, but if it does, the process
256 will wait for ever, so we panic in this instance. (There was a case of this
257 when a bug in a function that calls milliwait() caused it to pass invalid data.
258 That's when I added the check. :-)
260 Argument: an itimerval structure containing the interval
265 milliwait(struct itimerval *itval)
268 sigset_t old_sigmask;
269 (void)sigemptyset(&sigmask); /* Empty mask */
270 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
271 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
272 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
273 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
274 "setitimer() failed: %s", strerror(errno));
275 (void)sigfillset(&sigmask); /* All signals */
276 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
277 (void)sigsuspend(&sigmask); /* Until SIGALRM */
278 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
284 /*************************************************
285 * Millisecond sleep function *
286 *************************************************/
288 /* The basic sleep() function has a granularity of 1 second, which is too rough
289 in some cases - for example, when using an increasing delay to slow down
292 Argument: number of millseconds
299 struct itimerval itval;
300 itval.it_interval.tv_sec = 0;
301 itval.it_interval.tv_usec = 0;
302 itval.it_value.tv_sec = msec/1000;
303 itval.it_value.tv_usec = (msec % 1000) * 1000;
309 /*************************************************
310 * Compare microsecond times *
311 *************************************************/
318 Returns: -1, 0, or +1
322 exim_tvcmp(struct timeval *t1, struct timeval *t2)
324 if (t1->tv_sec > t2->tv_sec) return +1;
325 if (t1->tv_sec < t2->tv_sec) return -1;
326 if (t1->tv_usec > t2->tv_usec) return +1;
327 if (t1->tv_usec < t2->tv_usec) return -1;
334 /*************************************************
335 * Clock tick wait function *
336 *************************************************/
338 /* Exim uses a time + a pid to generate a unique identifier in two places: its
339 message IDs, and in file names for maildir deliveries. Because some OS now
340 re-use pids within the same second, sub-second times are now being used.
341 However, for absolute certaintly, we must ensure the clock has ticked before
342 allowing the relevant process to complete. At the time of implementation of
343 this code (February 2003), the speed of processors is such that the clock will
344 invariably have ticked already by the time a process has done its job. This
345 function prepares for the time when things are faster - and it also copes with
346 clocks that go backwards.
349 then_tv A timeval which was used to create uniqueness; its usec field
350 has been rounded down to the value of the resolution.
351 We want to be sure the current time is greater than this.
352 resolution The resolution that was used to divide the microseconds
353 (1 for maildir, larger for message ids)
359 exim_wait_tick(struct timeval *then_tv, int resolution)
361 struct timeval now_tv;
362 long int now_true_usec;
364 (void)gettimeofday(&now_tv, NULL);
365 now_true_usec = now_tv.tv_usec;
366 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
368 if (exim_tvcmp(&now_tv, then_tv) <= 0)
370 struct itimerval itval;
371 itval.it_interval.tv_sec = 0;
372 itval.it_interval.tv_usec = 0;
373 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
374 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
376 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
377 negative value for the microseconds is possible only in the case when "now"
378 is more than a second less than "then". That means that itval.it_value.tv_sec
379 is greater than zero. The following correction is therefore safe. */
381 if (itval.it_value.tv_usec < 0)
383 itval.it_value.tv_usec += 1000000;
384 itval.it_value.tv_sec -= 1;
387 DEBUG(D_transport|D_receive)
389 if (!running_in_test_harness)
391 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
392 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
393 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
394 itval.it_value.tv_usec);
405 /*************************************************
406 * Call fopen() with umask 777 and adjust mode *
407 *************************************************/
409 /* Exim runs with umask(0) so that files created with open() have the mode that
410 is specified in the open() call. However, there are some files, typically in
411 the spool directory, that are created with fopen(). They end up world-writeable
412 if no precautions are taken. Although the spool directory is not accessible to
413 the world, this is an untidiness. So this is a wrapper function for fopen()
414 that sorts out the mode of the created file.
417 filename the file name
418 options the fopen() options
419 mode the required mode
421 Returns: the fopened FILE or NULL
425 modefopen(const uschar *filename, const char *options, mode_t mode)
427 mode_t saved_umask = umask(0777);
428 FILE *f = Ufopen(filename, options);
429 (void)umask(saved_umask);
430 if (f != NULL) (void)fchmod(fileno(f), mode);
437 /*************************************************
438 * Ensure stdin, stdout, and stderr exist *
439 *************************************************/
441 /* Some operating systems grumble if an exec() happens without a standard
442 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
443 file will be opened and will use these fd values, and then some other bit of
444 code will assume, for example, that it can write error messages to stderr.
445 This function ensures that fds 0, 1, and 2 are open if they do not already
446 exist, by connecting them to /dev/null.
448 This function is also used to ensure that std{in,out,err} exist at all times,
449 so that if any library that Exim calls tries to use them, it doesn't crash.
461 for (i = 0; i <= 2; i++)
463 if (fstat(i, &statbuf) < 0 && errno == EBADF)
465 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
466 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
467 string_open_failed(errno, "/dev/null"));
468 if (devnull != i) (void)dup2(devnull, i);
471 if (devnull > 2) (void)close(devnull);
477 /*************************************************
478 * Close unwanted file descriptors for delivery *
479 *************************************************/
481 /* This function is called from a new process that has been forked to deliver
482 an incoming message, either directly, or using exec.
484 We want any smtp input streams to be closed in this new process. However, it
485 has been observed that using fclose() here causes trouble. When reading in -bS
486 input, duplicate copies of messages have been seen. The files will be sharing a
487 file pointer with the parent process, and it seems that fclose() (at least on
488 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
489 least sometimes. Hence we go for closing the underlying file descriptors.
491 If TLS is active, we want to shut down the TLS library, but without molesting
492 the parent's SSL connection.
494 For delivery of a non-SMTP message, we want to close stdin and stdout (and
495 stderr unless debugging) because the calling process might have set them up as
496 pipes and be waiting for them to close before it waits for the submission
497 process to terminate. If they aren't closed, they hold up the calling process
498 until the initial delivery process finishes, which is not what we want.
500 Exception: We do want it for synchronous delivery!
502 And notwithstanding all the above, if D_resolver is set, implying resolver
503 debugging, leave stdout open, because that's where the resolver writes its
506 When we close stderr (which implies we've also closed stdout), we also get rid
507 of any controlling terminal.
519 tls_close(FALSE); /* Shut down the TLS library */
521 (void)close(fileno(smtp_in));
522 (void)close(fileno(smtp_out));
527 (void)close(0); /* stdin */
528 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
529 if (debug_selector == 0) /* stderr */
531 if (!synchronous_delivery)
544 /*************************************************
546 *************************************************/
548 /* This function sets a new uid and gid permanently, optionally calling
549 initgroups() to set auxiliary groups. There are some special cases when running
550 Exim in unprivileged modes. In these situations the effective uid will not be
551 root; if we already have the right effective uid/gid, and don't need to
552 initialize any groups, leave things as they are.
557 igflag TRUE if initgroups() wanted
558 msg text to use in debugging output and failure log
560 Returns: nothing; bombs out on failure
564 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
566 uid_t euid = geteuid();
567 gid_t egid = getegid();
569 if (euid == root_uid || euid != uid || egid != gid || igflag)
571 /* At least one OS returns +1 for initgroups failure, so just check for
576 struct passwd *pw = getpwuid(uid);
579 if (initgroups(pw->pw_name, gid) != 0)
580 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
581 (long int)uid, strerror(errno));
583 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
584 "no passwd entry for uid=%ld", (long int)uid);
587 if (setgid(gid) < 0 || setuid(uid) < 0)
589 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
590 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
594 /* Debugging output included uid/gid and all groups */
598 int group_count, save_errno;
599 gid_t group_list[NGROUPS_MAX];
600 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
601 (long int)geteuid(), (long int)getegid(), (long int)getpid());
602 group_count = getgroups(NGROUPS_MAX, group_list);
604 debug_printf(" auxiliary group list:");
608 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
610 else if (group_count < 0)
611 debug_printf(" <error: %s>", strerror(save_errno));
612 else debug_printf(" <none>");
620 /*************************************************
622 *************************************************/
624 /* Exim exits via this function so that it always clears up any open
630 Returns: does not return
638 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
639 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
646 /*************************************************
647 * Extract port from host address *
648 *************************************************/
650 /* Called to extract the port from the values given to -oMa and -oMi.
651 It also checks the syntax of the address, and terminates it before the
652 port data when a port is extracted.
655 address the address, with possible port on the end
657 Returns: the port, or zero if there isn't one
658 bombs out on a syntax error
662 check_port(uschar *address)
664 int port = host_address_extract_port(address);
665 if (string_is_ip_address(address, NULL) == 0)
667 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
675 /*************************************************
676 * Test/verify an address *
677 *************************************************/
679 /* This function is called by the -bv and -bt code. It extracts a working
680 address from a full RFC 822 address. This isn't really necessary per se, but it
681 has the effect of collapsing source routes.
685 flags flag bits for verify_address()
686 exit_value to be set for failures
692 test_address(uschar *s, int flags, int *exit_value)
694 int start, end, domain;
695 uschar *parse_error = NULL;
696 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
700 fprintf(stdout, "syntax error: %s\n", parse_error);
705 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
706 -1, -1, NULL, NULL, NULL);
707 if (rc == FAIL) *exit_value = 2;
708 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
714 /*************************************************
715 * Show supported features *
716 *************************************************/
718 /* This function is called for -bV/--version and for -d to output the optional
719 features of the current Exim binary.
721 Arguments: a FILE for printing
726 show_whats_supported(FILE *f)
730 #ifdef DB_VERSION_STRING
731 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
732 #elif defined(BTREEVERSION) && defined(HASHVERSION)
734 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
736 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
738 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
739 fprintf(f, "Probably ndbm\n");
740 #elif defined(USE_TDB)
741 fprintf(f, "Using tdb\n");
744 fprintf(f, "Probably GDBM (native mode)\n");
746 fprintf(f, "Probably GDBM (compatibility mode)\n");
750 fprintf(f, "Support for:");
751 #ifdef SUPPORT_CRYPTEQ
752 fprintf(f, " crypteq");
755 fprintf(f, " iconv()");
760 #ifdef HAVE_SETCLASSRESOURCES
761 fprintf(f, " use_setclassresources");
770 fprintf(f, " Expand_dlfunc");
772 #ifdef USE_TCP_WRAPPERS
773 fprintf(f, " TCPwrappers");
777 fprintf(f, " GnuTLS");
779 fprintf(f, " OpenSSL");
782 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
783 fprintf(f, " translate_ip_address");
785 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
786 fprintf(f, " move_frozen_messages");
788 #ifdef WITH_CONTENT_SCAN
789 fprintf(f, " Content_Scanning");
794 #ifdef WITH_OLD_DEMIME
795 fprintf(f, " Old_Demime");
797 #ifdef EXPERIMENTAL_SPF
798 fprintf(f, " Experimental_SPF");
800 #ifdef EXPERIMENTAL_SRS
801 fprintf(f, " Experimental_SRS");
803 #ifdef EXPERIMENTAL_BRIGHTMAIL
804 fprintf(f, " Experimental_Brightmail");
806 #ifdef EXPERIMENTAL_DCC
807 fprintf(f, " Experimental_DCC");
811 fprintf(f, "Lookups (built-in):");
812 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
813 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
815 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
818 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
819 fprintf(f, " dbm dbmjz dbmnz");
821 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
822 fprintf(f, " dnsdb");
824 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
825 fprintf(f, " dsearch");
827 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
828 fprintf(f, " ibase");
830 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
831 fprintf(f, " ldap ldapdn ldapm");
833 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
834 fprintf(f, " mysql");
836 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
837 fprintf(f, " nis nis0");
839 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
840 fprintf(f, " nisplus");
842 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
843 fprintf(f, " oracle");
845 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
846 fprintf(f, " passwd");
848 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
849 fprintf(f, " pgsql");
851 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
852 fprintf(f, " sqlite");
854 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
855 fprintf(f, " testdb");
857 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
858 fprintf(f, " whoson");
862 fprintf(f, "Authenticators:");
864 fprintf(f, " cram_md5");
866 #ifdef AUTH_CYRUS_SASL
867 fprintf(f, " cyrus_sasl");
870 fprintf(f, " dovecot");
873 fprintf(f, " gsasl");
875 #ifdef AUTH_HEIMDAL_GSSAPI
876 fprintf(f, " heimdal_gssapi");
878 #ifdef AUTH_PLAINTEXT
879 fprintf(f, " plaintext");
886 fprintf(f, "Routers:");
888 fprintf(f, " accept");
890 #ifdef ROUTER_DNSLOOKUP
891 fprintf(f, " dnslookup");
893 #ifdef ROUTER_IPLITERAL
894 fprintf(f, " ipliteral");
896 #ifdef ROUTER_IPLOOKUP
897 fprintf(f, " iplookup");
899 #ifdef ROUTER_MANUALROUTE
900 fprintf(f, " manualroute");
902 #ifdef ROUTER_QUERYPROGRAM
903 fprintf(f, " queryprogram");
905 #ifdef ROUTER_REDIRECT
906 fprintf(f, " redirect");
910 fprintf(f, "Transports:");
911 #ifdef TRANSPORT_APPENDFILE
912 fprintf(f, " appendfile");
913 #ifdef SUPPORT_MAILDIR
914 fprintf(f, "/maildir");
916 #ifdef SUPPORT_MAILSTORE
917 fprintf(f, "/mailstore");
923 #ifdef TRANSPORT_AUTOREPLY
924 fprintf(f, " autoreply");
926 #ifdef TRANSPORT_LMTP
929 #ifdef TRANSPORT_PIPE
932 #ifdef TRANSPORT_SMTP
937 if (fixed_never_users[0] > 0)
940 fprintf(f, "Fixed never_users: ");
941 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
942 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
943 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
946 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
948 /* Everything else is details which are only worth reporting when debugging.
949 Perhaps the tls_version_report should move into this too. */
954 /* clang defines __GNUC__ (at least, for me) so test for it first */
955 #if defined(__clang__)
956 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
957 #elif defined(__GNUC__)
958 fprintf(f, "Compiler: GCC [%s]\n",
962 "? unknown version ?"
966 fprintf(f, "Compiler: <unknown>\n");
970 tls_version_report(f);
973 for (authi = auths_available; *authi->driver_name != '\0'; ++authi) {
974 if (authi->version_report) {
975 (*authi->version_report)(f);
979 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
981 PCRE_MAJOR, PCRE_MINOR,
982 /* PRE_PRERELEASE is either defined and empty or a string.
983 * unless its an ancient version of PCRE in which case it
985 #ifdef PCRE_PRERELEASE
986 # define STRINGIFY(x) #x
987 STRINGIFY(PCRE_PRERELEASE) "",
995 for (i = 0; i < lookup_list_count; i++)
997 if (lookup_list[i]->version_report)
998 lookup_list[i]->version_report(f);
1001 #ifdef WHITELIST_D_MACROS
1002 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1004 fprintf(f, "WHITELIST_D_MACROS unset\n");
1006 #ifdef TRUSTED_CONFIG_LIST
1007 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1009 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1018 /*************************************************
1019 * Quote a local part *
1020 *************************************************/
1022 /* This function is used when a sender address or a From: or Sender: header
1023 line is being created from the caller's login, or from an authenticated_id. It
1024 applies appropriate quoting rules for a local part.
1026 Argument: the local part
1027 Returns: the local part, quoted if necessary
1031 local_part_quote(uschar *lpart)
1033 BOOL needs_quote = FALSE;
1038 for (t = lpart; !needs_quote && *t != 0; t++)
1040 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1041 (*t != '.' || t == lpart || t[1] == 0);
1044 if (!needs_quote) return lpart;
1047 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1051 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1054 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1057 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1058 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1059 yield = string_cat(yield, &size, &ptr, nq, 1);
1063 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1071 /*************************************************
1072 * Load readline() functions *
1073 *************************************************/
1075 /* This function is called from testing executions that read data from stdin,
1076 but only when running as the calling user. Currently, only -be does this. The
1077 function loads the readline() function library and passes back the functions.
1078 On some systems, it needs the curses library, so load that too, but try without
1079 it if loading fails. All this functionality has to be requested at build time.
1082 fn_readline_ptr pointer to where to put the readline pointer
1083 fn_addhist_ptr pointer to where to put the addhistory function
1085 Returns: the dlopen handle or NULL on failure
1089 set_readline(char * (**fn_readline_ptr)(const char *),
1090 void (**fn_addhist_ptr)(const char *))
1093 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1095 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1096 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1098 if (dlhandle != NULL)
1100 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1101 * char * readline (const char *prompt);
1102 * void add_history (const char *string);
1104 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1105 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1109 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1118 /*************************************************
1119 * Get a line from stdin for testing things *
1120 *************************************************/
1122 /* This function is called when running tests that can take a number of lines
1123 of input (for example, -be and -bt). It handles continuations and trailing
1124 spaces. And prompting and a blank line output on eof. If readline() is in use,
1125 the arguments are non-NULL and provide the relevant functions.
1128 fn_readline readline function or NULL
1129 fn_addhist addhist function or NULL
1131 Returns: pointer to dynamic memory, or NULL at end of file
1135 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1140 uschar *yield = NULL;
1142 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1146 uschar buffer[1024];
1150 char *readline_line = NULL;
1151 if (fn_readline != NULL)
1153 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1154 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1155 p = US readline_line;
1160 /* readline() not in use */
1163 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1167 /* Handle the line */
1169 ss = p + (int)Ustrlen(p);
1170 while (ss > p && isspace(ss[-1])) ss--;
1174 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1177 yield = string_cat(yield, &size, &ptr, p, ss - p);
1180 if (fn_readline != NULL) free(readline_line);
1183 if (ss == p || yield[ptr-1] != '\\')
1191 if (yield == NULL) printf("\n");
1197 /*************************************************
1198 * Output usage information for the program *
1199 *************************************************/
1201 /* This function is called when there are no recipients
1202 or a specific --help argument was added.
1205 progname information on what name we were called by
1207 Returns: DOES NOT RETURN
1211 exim_usage(uschar *progname)
1214 /* Handle specific program invocation varients */
1215 if (Ustrcmp(progname, US"-mailq") == 0)
1218 "mailq - list the contents of the mail queue\n\n"
1219 "For a list of options, see the Exim documentation.\n");
1223 /* Generic usage - we output this whatever happens */
1225 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1226 "not directly from a shell command line. Options and/or arguments control\n"
1227 "what it does when called. For a list of options, see the Exim documentation.\n");
1234 /*************************************************
1235 * Validate that the macros given are okay *
1236 *************************************************/
1238 /* Typically, Exim will drop privileges if macros are supplied. In some
1239 cases, we want to not do so.
1241 Arguments: none (macros is a global)
1242 Returns: true if trusted, false otherwise
1246 macros_trusted(void)
1248 #ifdef WHITELIST_D_MACROS
1250 uschar *whitelisted, *end, *p, **whites, **w;
1251 int white_count, i, n;
1253 BOOL prev_char_item, found;
1258 #ifndef WHITELIST_D_MACROS
1262 /* We only trust -D overrides for some invoking users:
1263 root, the exim run-time user, the optional config owner user.
1264 I don't know why config-owner would be needed, but since they can own the
1265 config files anyway, there's no security risk to letting them override -D. */
1266 if ( ! ((real_uid == root_uid)
1267 || (real_uid == exim_uid)
1268 #ifdef CONFIGURE_OWNER
1269 || (real_uid == config_uid)
1273 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1277 /* Get a list of macros which are whitelisted */
1278 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1279 prev_char_item = FALSE;
1281 for (p = whitelisted; *p != '\0'; ++p)
1283 if (*p == ':' || isspace(*p))
1288 prev_char_item = FALSE;
1291 if (!prev_char_item)
1292 prev_char_item = TRUE;
1299 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1300 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1305 if (i == white_count)
1307 while (*p != '\0' && p < end)
1313 /* The list of macros should be very short. Accept the N*M complexity. */
1314 for (m = macros; m != NULL; m = m->next)
1317 for (w = whites; *w; ++w)
1318 if (Ustrcmp(*w, m->name) == 0)
1325 if (m->replacement == NULL)
1327 len = Ustrlen(m->replacement);
1330 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1331 0, PCRE_EOPT, NULL, 0);
1334 if (n != PCRE_ERROR_NOMATCH)
1335 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1339 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1345 /*************************************************
1346 * Entry point and high-level code *
1347 *************************************************/
1349 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1350 the appropriate action. All the necessary functions are present in the one
1351 binary. I originally thought one should split it up, but it turns out that so
1352 much of the apparatus is needed in each chunk that one might as well just have
1353 it all available all the time, which then makes the coding easier as well.
1356 argc count of entries in argv
1357 argv argument strings, with argv[0] being the program name
1359 Returns: EXIT_SUCCESS if terminated successfully
1360 EXIT_FAILURE otherwise, except when a message has been sent
1361 to the sender, and -oee was given
1365 main(int argc, char **cargv)
1367 uschar **argv = USS cargv;
1368 int arg_receive_timeout = -1;
1369 int arg_smtp_receive_timeout = -1;
1370 int arg_error_handling = error_handling;
1371 int filter_sfd = -1;
1372 int filter_ufd = -1;
1375 int list_queue_option = 0;
1377 int msg_action_arg = -1;
1378 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1379 int queue_only_reason = 0;
1381 int perl_start_option = 0;
1383 int recipients_arg = argc;
1384 int sender_address_domain = 0;
1385 int test_retry_arg = -1;
1386 int test_rewrite_arg = -1;
1387 BOOL arg_queue_only = FALSE;
1388 BOOL bi_option = FALSE;
1389 BOOL checking = FALSE;
1390 BOOL count_queue = FALSE;
1391 BOOL expansion_test = FALSE;
1392 BOOL extract_recipients = FALSE;
1393 BOOL forced_delivery = FALSE;
1394 BOOL f_end_dot = FALSE;
1395 BOOL deliver_give_up = FALSE;
1396 BOOL list_queue = FALSE;
1397 BOOL list_options = FALSE;
1398 BOOL local_queue_only;
1400 BOOL one_msg_action = FALSE;
1401 BOOL queue_only_set = FALSE;
1402 BOOL receiving_message = TRUE;
1403 BOOL sender_ident_set = FALSE;
1404 BOOL session_local_queue_only;
1406 BOOL removed_privilege = FALSE;
1407 BOOL usage_wanted = FALSE;
1408 BOOL verify_address_mode = FALSE;
1409 BOOL verify_as_sender = FALSE;
1410 BOOL version_printed = FALSE;
1411 uschar *alias_arg = NULL;
1412 uschar *called_as = US"";
1413 uschar *start_queue_run_id = NULL;
1414 uschar *stop_queue_run_id = NULL;
1415 uschar *expansion_test_message = NULL;
1416 uschar *ftest_domain = NULL;
1417 uschar *ftest_localpart = NULL;
1418 uschar *ftest_prefix = NULL;
1419 uschar *ftest_suffix = NULL;
1420 uschar *malware_test_file = NULL;
1421 uschar *real_sender_address;
1422 uschar *originator_home = US"/";
1426 struct stat statbuf;
1427 pid_t passed_qr_pid = (pid_t)0;
1428 int passed_qr_pipe = -1;
1429 gid_t group_list[NGROUPS_MAX];
1431 /* Possible options for -R and -S */
1433 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1435 /* Need to define this in case we need to change the environment in order
1436 to get rid of a bogus time zone. We have to make it char rather than uschar
1437 because some OS define it in /usr/include/unistd.h. */
1439 extern char **environ;
1441 /* If the Exim user and/or group and/or the configuration file owner/group were
1442 defined by ref:name at build time, we must now find the actual uid/gid values.
1443 This is a feature to make the lives of binary distributors easier. */
1445 #ifdef EXIM_USERNAME
1446 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1450 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1454 /* If ref:name uses a number as the name, route_finduser() returns
1455 TRUE with exim_uid set and pw coerced to NULL. */
1457 exim_gid = pw->pw_gid;
1458 #ifndef EXIM_GROUPNAME
1462 "exim: ref:name should specify a usercode, not a group.\n"
1463 "exim: can't let you get away with it unless you also specify a group.\n");
1470 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1476 #ifdef EXIM_GROUPNAME
1477 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1479 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1485 #ifdef CONFIGURE_OWNERNAME
1486 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1488 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1489 CONFIGURE_OWNERNAME);
1494 /* We default the system_filter_user to be the Exim run-time user, as a
1495 sane non-root value. */
1496 system_filter_uid = exim_uid;
1498 #ifdef CONFIGURE_GROUPNAME
1499 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1501 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1502 CONFIGURE_GROUPNAME);
1507 /* In the Cygwin environment, some initialization needs doing. It is fudged
1508 in by means of this macro. */
1514 /* Check a field which is patched when we are running Exim within its
1515 testing harness; do a fast initial check, and then the whole thing. */
1517 running_in_test_harness =
1518 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1520 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1521 at the start of a program; however, it seems that some environments do not
1522 follow this. A "strange" locale can affect the formatting of timestamps, so we
1525 setlocale(LC_ALL, "C");
1527 /* Set up the default handler for timing using alarm(). */
1529 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1531 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1532 because store_malloc writes a log entry on failure. */
1534 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1535 if (log_buffer == NULL)
1537 fprintf(stderr, "exim: failed to get store for log buffer\n");
1541 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1542 NULL when the daemon is run and the file is closed. We have to use this
1543 indirection, because some systems don't allow writing to the variable "stderr".
1546 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1548 /* Arrange for the PCRE regex library to use our store functions. Note that
1549 the normal calls are actually macros that add additional arguments for
1550 debugging purposes so we have to assign specially constructed functions here.
1551 The default is to use store in the stacking pool, but this is overridden in the
1552 regex_must_compile() function. */
1554 pcre_malloc = function_store_get;
1555 pcre_free = function_dummy_free;
1557 /* Ensure there is a big buffer for temporary use in several places. It is put
1558 in malloc store so that it can be freed for enlargement if necessary. */
1560 big_buffer = store_malloc(big_buffer_size);
1562 /* Set up the handler for the data request signal, and set the initial
1563 descriptive text. */
1565 set_process_info("initializing");
1566 os_restarting_signal(SIGUSR1, usr1_handler);
1568 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1569 in the daemon code. For the rest of Exim's uses, we ignore it. */
1571 signal(SIGHUP, SIG_IGN);
1573 /* We don't want to die on pipe errors as the code is written to handle
1574 the write error instead. */
1576 signal(SIGPIPE, SIG_IGN);
1578 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1579 set to SIG_IGN. This causes subprocesses that complete before the parent
1580 process waits for them not to hang around, so when Exim calls wait(), nothing
1581 is there. The wait() code has been made robust against this, but let's ensure
1582 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1583 ending status. We use sigaction rather than plain signal() on those OS where
1584 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1585 problem on AIX with this.) */
1589 struct sigaction act;
1590 act.sa_handler = SIG_DFL;
1591 sigemptyset(&(act.sa_mask));
1593 sigaction(SIGCHLD, &act, NULL);
1596 signal(SIGCHLD, SIG_DFL);
1599 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1604 /* Set up the version number. Set up the leading 'E' for the external form of
1605 message ids, set the pointer to the internal form, and initialize it to
1606 indicate no message being processed. */
1609 message_id_option[0] = '-';
1610 message_id_external = message_id_option + 1;
1611 message_id_external[0] = 'E';
1612 message_id = message_id_external + 1;
1615 /* Set the umask to zero so that any files Exim creates using open() are
1616 created with the modes that it specifies. NOTE: Files created with fopen() have
1617 a problem, which was not recognized till rather late (February 2006). With this
1618 umask, such files will be world writeable. (They are all content scanning files
1619 in the spool directory, which isn't world-accessible, so this is not a
1620 disaster, but it's untidy.) I don't want to change this overall setting,
1621 however, because it will interact badly with the open() calls. Instead, there's
1622 now a function called modefopen() that fiddles with the umask while calling
1627 /* Precompile the regular expression for matching a message id. Keep this in
1628 step with the code that generates ids in the accept.c module. We need to do
1629 this here, because the -M options check their arguments for syntactic validity
1630 using mac_ismsgid, which uses this. */
1633 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1635 /* Precompile the regular expression that is used for matching an SMTP error
1636 code, possibly extended, at the start of an error message. Note that the
1637 terminating whitespace character is included. */
1640 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1643 #ifdef WHITELIST_D_MACROS
1644 /* Precompile the regular expression used to filter the content of macros
1645 given to -D for permissibility. */
1647 regex_whitelisted_macro =
1648 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1652 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1653 this seems to be a generally accepted convention, since one finds symbolic
1654 links called "mailq" in standard OS configurations. */
1656 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1657 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1660 receiving_message = FALSE;
1661 called_as = US"-mailq";
1664 /* If the program is called as "rmail" treat it as equivalent to
1665 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1666 i.e. preventing a single dot on a line from terminating the message, and
1667 returning with zero return code, even in cases of error (provided an error
1668 message has been sent). */
1670 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1671 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1674 called_as = US"-rmail";
1675 errors_sender_rc = EXIT_SUCCESS;
1678 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1679 this is a smail convention. */
1681 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1682 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1684 smtp_input = smtp_batched_input = TRUE;
1685 called_as = US"-rsmtp";
1688 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1689 this is a smail convention. */
1691 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1692 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1695 receiving_message = FALSE;
1696 called_as = US"-runq";
1699 /* If the program is called as "newaliases" treat it as equivalent to
1700 "exim -bi"; this is a sendmail convention. */
1702 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1703 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1706 receiving_message = FALSE;
1707 called_as = US"-newaliases";
1710 /* Save the original effective uid for a couple of uses later. It should
1711 normally be root, but in some esoteric environments it may not be. */
1713 original_euid = geteuid();
1715 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1716 to be the same as the real ones. This makes a difference only if Exim is setuid
1717 (or setgid) to something other than root, which could be the case in some
1718 special configurations. */
1720 real_uid = getuid();
1721 real_gid = getgid();
1723 if (real_uid == root_uid)
1725 rv = setgid(real_gid);
1728 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1729 (long int)real_gid, strerror(errno));
1732 rv = setuid(real_uid);
1735 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1736 (long int)real_uid, strerror(errno));
1741 /* If neither the original real uid nor the original euid was root, Exim is
1742 running in an unprivileged state. */
1744 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1746 /* Scan the program's arguments. Some can be dealt with right away; others are
1747 simply recorded for checking and handling afterwards. Do a high-level switch
1748 on the second character (the one after '-'), to save some effort. */
1750 for (i = 1; i < argc; i++)
1752 BOOL badarg = FALSE;
1753 uschar *arg = argv[i];
1757 /* An argument not starting with '-' is the start of a recipients list;
1758 break out of the options-scanning loop. */
1766 /* An option consistion of -- terminates the options */
1768 if (Ustrcmp(arg, "--") == 0)
1770 recipients_arg = i + 1;
1774 /* Handle flagged options */
1776 switchchar = arg[1];
1779 /* Make all -ex options synonymous with -oex arguments, since that
1780 is assumed by various callers. Also make -qR options synonymous with -R
1781 options, as that seems to be required as well. Allow for -qqR too, and
1782 the same for -S options. */
1784 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1785 Ustrncmp(arg+1, "qR", 2) == 0 ||
1786 Ustrncmp(arg+1, "qS", 2) == 0)
1788 switchchar = arg[2];
1791 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1793 switchchar = arg[3];
1795 queue_2stage = TRUE;
1798 /* Make -r synonymous with -f, since it is a documented alias */
1800 else if (arg[1] == 'r') switchchar = 'f';
1802 /* Make -ov synonymous with -v */
1804 else if (Ustrcmp(arg, "-ov") == 0)
1810 /* deal with --option_aliases */
1811 else if (switchchar == '-')
1813 if (Ustrcmp(argrest, "help") == 0)
1815 usage_wanted = TRUE;
1818 else if (Ustrcmp(argrest, "version") == 0)
1825 /* High-level switch on active initial letter */
1829 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1830 so has no need of it. */
1833 if (*argrest == 0) i++; /* Skip over the type */
1838 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1840 /* -bd: Run in daemon mode, awaiting SMTP connections.
1841 -bdf: Ditto, but in the foreground.
1844 if (*argrest == 'd')
1846 daemon_listen = TRUE;
1847 if (*(++argrest) == 'f') background_daemon = FALSE;
1848 else if (*argrest != 0) { badarg = TRUE; break; }
1851 /* -be: Run in expansion test mode
1852 -bem: Ditto, but read a message from a file first
1855 else if (*argrest == 'e')
1857 expansion_test = checking = TRUE;
1858 if (argrest[1] == 'm')
1860 if (++i >= argc) { badarg = TRUE; break; }
1861 expansion_test_message = argv[i];
1864 if (argrest[1] != 0) { badarg = TRUE; break; }
1867 /* -bF: Run system filter test */
1869 else if (*argrest == 'F')
1871 filter_test |= FTEST_SYSTEM;
1872 if (*(++argrest) != 0) { badarg = TRUE; break; }
1873 if (++i < argc) filter_test_sfile = argv[i]; else
1875 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1880 /* -bf: Run user filter test
1881 -bfd: Set domain for filter testing
1882 -bfl: Set local part for filter testing
1883 -bfp: Set prefix for filter testing
1884 -bfs: Set suffix for filter testing
1887 else if (*argrest == 'f')
1889 if (*(++argrest) == 0)
1891 filter_test |= FTEST_USER;
1892 if (++i < argc) filter_test_ufile = argv[i]; else
1894 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1902 fprintf(stderr, "exim: string expected after %s\n", arg);
1905 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1906 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1907 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1908 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1909 else { badarg = TRUE; break; }
1913 /* -bh: Host checking - an IP address must follow. */
1915 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1917 if (++i >= argc) { badarg = TRUE; break; }
1918 sender_host_address = argv[i];
1919 host_checking = checking = log_testing_mode = TRUE;
1920 host_checking_callout = argrest[1] == 'c';
1923 /* -bi: This option is used by sendmail to initialize *the* alias file,
1924 though it has the -oA option to specify a different file. Exim has no
1925 concept of *the* alias file, but since Sun's YP make script calls
1926 sendmail this way, some support must be provided. */
1928 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1930 /* -bm: Accept and deliver message - the default option. Reinstate
1931 receiving_message, which got turned off for all -b options. */
1933 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1935 /* -bmalware: test the filename given for malware */
1937 else if (Ustrcmp(argrest, "malware") == 0)
1939 if (++i >= argc) { badarg = TRUE; break; }
1940 malware_test_file = argv[i];
1943 /* -bnq: For locally originating messages, do not qualify unqualified
1944 addresses. In the envelope, this causes errors; in header lines they
1947 else if (Ustrcmp(argrest, "nq") == 0)
1949 allow_unqualified_sender = FALSE;
1950 allow_unqualified_recipient = FALSE;
1953 /* -bpxx: List the contents of the mail queue, in various forms. If
1954 the option is -bpc, just a queue count is needed. Otherwise, if the
1955 first letter after p is r, then order is random. */
1957 else if (*argrest == 'p')
1959 if (*(++argrest) == 'c')
1962 if (*(++argrest) != 0) badarg = TRUE;
1966 if (*argrest == 'r')
1968 list_queue_option = 8;
1971 else list_queue_option = 0;
1975 /* -bp: List the contents of the mail queue, top-level only */
1977 if (*argrest == 0) {}
1979 /* -bpu: List the contents of the mail queue, top-level undelivered */
1981 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1983 /* -bpa: List the contents of the mail queue, including all delivered */
1985 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1987 /* Unknown after -bp[r] */
1997 /* -bP: List the configuration variables given as the address list.
1998 Force -v, so configuration errors get displayed. */
2000 else if (Ustrcmp(argrest, "P") == 0)
2002 list_options = TRUE;
2003 debug_selector |= D_v;
2004 debug_file = stderr;
2007 /* -brt: Test retry configuration lookup */
2009 else if (Ustrcmp(argrest, "rt") == 0)
2011 test_retry_arg = i + 1;
2015 /* -brw: Test rewrite configuration */
2017 else if (Ustrcmp(argrest, "rw") == 0)
2019 test_rewrite_arg = i + 1;
2023 /* -bS: Read SMTP commands on standard input, but produce no replies -
2024 all errors are reported by sending messages. */
2026 else if (Ustrcmp(argrest, "S") == 0)
2027 smtp_input = smtp_batched_input = receiving_message = TRUE;
2029 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2030 on standard output. */
2032 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2034 /* -bt: address testing mode */
2036 else if (Ustrcmp(argrest, "t") == 0)
2037 address_test_mode = checking = log_testing_mode = TRUE;
2039 /* -bv: verify addresses */
2041 else if (Ustrcmp(argrest, "v") == 0)
2042 verify_address_mode = checking = log_testing_mode = TRUE;
2044 /* -bvs: verify sender addresses */
2046 else if (Ustrcmp(argrest, "vs") == 0)
2048 verify_address_mode = checking = log_testing_mode = TRUE;
2049 verify_as_sender = TRUE;
2052 /* -bV: Print version string and support details */
2054 else if (Ustrcmp(argrest, "V") == 0)
2056 printf("Exim version %s #%s built %s\n", version_string,
2057 version_cnumber, version_date);
2058 printf("%s\n", CS version_copyright);
2059 version_printed = TRUE;
2060 show_whats_supported(stdout);
2063 /* -bw: inetd wait mode, accept a listening socket as stdin */
2065 else if (*argrest == 'w')
2067 inetd_wait_mode = TRUE;
2068 background_daemon = FALSE;
2069 daemon_listen = TRUE;
2070 if (*(++argrest) != '\0')
2072 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2073 if (inetd_wait_timeout <= 0)
2075 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2085 /* -C: change configuration file list; ignore if it isn't really
2086 a change! Enforce a prefix check if required. */
2091 if(++i < argc) argrest = argv[i]; else
2092 { badarg = TRUE; break; }
2094 if (Ustrcmp(config_main_filelist, argrest) != 0)
2096 #ifdef ALT_CONFIG_PREFIX
2098 int len = Ustrlen(ALT_CONFIG_PREFIX);
2099 uschar *list = argrest;
2101 while((filename = string_nextinlist(&list, &sep, big_buffer,
2102 big_buffer_size)) != NULL)
2104 if ((Ustrlen(filename) < len ||
2105 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2106 Ustrstr(filename, "/../") != NULL) &&
2107 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2109 fprintf(stderr, "-C Permission denied\n");
2114 if (real_uid != root_uid)
2116 #ifdef TRUSTED_CONFIG_LIST
2118 if (real_uid != exim_uid
2119 #ifdef CONFIGURE_OWNER
2120 && real_uid != config_uid
2123 trusted_config = FALSE;
2126 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2129 struct stat statbuf;
2131 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2132 (statbuf.st_uid != root_uid /* owner not root */
2133 #ifdef CONFIGURE_OWNER
2134 && statbuf.st_uid != config_uid /* owner not the special one */
2137 (statbuf.st_gid != root_gid /* group not root */
2138 #ifdef CONFIGURE_GROUP
2139 && statbuf.st_gid != config_gid /* group not the special one */
2141 && (statbuf.st_mode & 020) != 0 /* group writeable */
2143 (statbuf.st_mode & 2) != 0) /* world writeable */
2145 trusted_config = FALSE;
2150 /* Well, the trust list at least is up to scratch... */
2151 void *reset_point = store_get(0);
2152 uschar *trusted_configs[32];
2156 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2158 uschar *start = big_buffer, *nl;
2159 while (*start && isspace(*start))
2163 nl = Ustrchr(start, '\n');
2166 trusted_configs[nr_configs++] = string_copy(start);
2167 if (nr_configs == 32)
2175 uschar *list = argrest;
2177 while (trusted_config && (filename = string_nextinlist(&list,
2178 &sep, big_buffer, big_buffer_size)) != NULL)
2180 for (i=0; i < nr_configs; i++)
2182 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2185 if (i == nr_configs)
2187 trusted_config = FALSE;
2191 store_reset(reset_point);
2195 /* No valid prefixes found in trust_list file. */
2196 trusted_config = FALSE;
2202 /* Could not open trust_list file. */
2203 trusted_config = FALSE;
2207 /* Not root; don't trust config */
2208 trusted_config = FALSE;
2212 config_main_filelist = argrest;
2213 config_changed = TRUE;
2218 /* -D: set up a macro definition */
2221 #ifdef DISABLE_D_OPTION
2222 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2227 macro_item *mlast = NULL;
2230 uschar *s = argrest;
2232 while (isspace(*s)) s++;
2234 if (*s < 'A' || *s > 'Z')
2236 fprintf(stderr, "exim: macro name set by -D must start with "
2237 "an upper case letter\n");
2241 while (isalnum(*s) || *s == '_')
2243 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2247 if (ptr == 0) { badarg = TRUE; break; }
2248 while (isspace(*s)) s++;
2251 if (*s++ != '=') { badarg = TRUE; break; }
2252 while (isspace(*s)) s++;
2255 for (m = macros; m != NULL; m = m->next)
2257 if (Ustrcmp(m->name, name) == 0)
2259 fprintf(stderr, "exim: duplicated -D in command line\n");
2265 m = store_get(sizeof(macro_item) + Ustrlen(name));
2267 m->command_line = TRUE;
2268 if (mlast == NULL) macros = m; else mlast->next = m;
2269 Ustrcpy(m->name, name);
2270 m->replacement = string_copy(s);
2272 if (clmacro_count >= MAX_CLMACROS)
2274 fprintf(stderr, "exim: too many -D options on command line\n");
2277 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2283 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2284 The latter is now a no-op, retained for compatibility only. If -dd is used,
2285 debugging subprocesses of the daemon is disabled. */
2288 if (Ustrcmp(argrest, "ropcr") == 0)
2290 /* drop_cr = TRUE; */
2293 /* Use an intermediate variable so that we don't set debugging while
2294 decoding the debugging bits. */
2298 unsigned int selector = D_default;
2301 if (*argrest == 'd')
2303 debug_daemon = TRUE;
2307 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2308 debug_options_count, US"debug", 0);
2309 debug_selector = selector;
2314 /* -E: This is a local error message. This option is not intended for
2315 external use at all, but is not restricted to trusted callers because it
2316 does no harm (just suppresses certain error messages) and if Exim is run
2317 not setuid root it won't always be trusted when it generates error
2318 messages using this option. If there is a message id following -E, point
2319 message_reference at it, for logging. */
2322 local_error_message = TRUE;
2323 if (mac_ismsgid(argrest)) message_reference = argrest;
2327 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2328 option, so it looks as if historically the -oex options are also callable
2329 without the leading -o. So we have to accept them. Before the switch,
2330 anything starting -oe has been converted to -e. Exim does not support all
2331 of the sendmail error options. */
2334 if (Ustrcmp(argrest, "e") == 0)
2336 arg_error_handling = ERRORS_SENDER;
2337 errors_sender_rc = EXIT_SUCCESS;
2339 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2340 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2341 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2342 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2347 /* -F: Set sender's full name, used instead of the gecos entry from
2348 the password file. Since users can usually alter their gecos entries,
2349 there's no security involved in using this instead. The data can follow
2350 the -F or be in the next argument. */
2355 if(++i < argc) argrest = argv[i]; else
2356 { badarg = TRUE; break; }
2358 originator_name = argrest;
2359 sender_name_forced = TRUE;
2363 /* -f: Set sender's address - this value is only actually used if Exim is
2364 run by a trusted user, or if untrusted_set_sender is set and matches the
2365 address, except that the null address can always be set by any user. The
2366 test for this happens later, when the value given here is ignored when not
2367 permitted. For an untrusted user, the actual sender is still put in Sender:
2368 if it doesn't match the From: header (unless no_local_from_check is set).
2369 The data can follow the -f or be in the next argument. The -r switch is an
2370 obsolete form of -f but since there appear to be programs out there that
2371 use anything that sendmail has ever supported, better accept it - the
2372 synonymizing is done before the switch above.
2374 At this stage, we must allow domain literal addresses, because we don't
2375 know what the setting of allow_domain_literals is yet. Ditto for trailing
2376 dots and strip_trailing_dot. */
2384 if (i+1 < argc) argrest = argv[++i]; else
2385 { badarg = TRUE; break; }
2389 sender_address = string_sprintf(""); /* Ensure writeable memory */
2393 uschar *temp = argrest + Ustrlen(argrest) - 1;
2394 while (temp >= argrest && isspace(*temp)) temp--;
2395 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2396 allow_domain_literals = TRUE;
2397 strip_trailing_dot = TRUE;
2398 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2399 &sender_address_domain, TRUE);
2400 allow_domain_literals = FALSE;
2401 strip_trailing_dot = FALSE;
2402 if (sender_address == NULL)
2404 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2405 return EXIT_FAILURE;
2408 sender_address_forced = TRUE;
2412 /* This is some Sendmail thing which can be ignored */
2417 /* -h: Set the hop count for an incoming message. Exim does not currently
2418 support this; it always computes it by counting the Received: headers.
2419 To put it in will require a change to the spool header file format. */
2424 if(++i < argc) argrest = argv[i]; else
2425 { badarg = TRUE; break; }
2427 if (!isdigit(*argrest)) badarg = TRUE;
2431 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2432 not to be documented for sendmail but mailx (at least) uses it) */
2435 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2440 receiving_message = FALSE;
2442 /* -MC: continue delivery of another message via an existing open
2443 file descriptor. This option is used for an internal call by the
2444 smtp transport when there is a pending message waiting to go to an
2445 address to which it has got a connection. Five subsequent arguments are
2446 required: transport name, host name, IP address, sequence number, and
2447 message_id. Transports may decline to create new processes if the sequence
2448 number gets too big. The channel is stdin. This (-MC) must be the last
2449 argument. There's a subsequent check that the real-uid is privileged.
2451 If we are running in the test harness. delay for a bit, to let the process
2452 that set this one up complete. This makes for repeatability of the logging,
2455 if (Ustrcmp(argrest, "C") == 0)
2457 union sockaddr_46 interface_sock;
2458 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2462 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2463 return EXIT_FAILURE;
2466 if (msg_action_arg >= 0)
2468 fprintf(stderr, "exim: incompatible arguments\n");
2469 return EXIT_FAILURE;
2472 continue_transport = argv[++i];
2473 continue_hostname = argv[++i];
2474 continue_host_address = argv[++i];
2475 continue_sequence = Uatoi(argv[++i]);
2476 msg_action = MSG_DELIVER;
2477 msg_action_arg = ++i;
2478 forced_delivery = TRUE;
2479 queue_run_pid = passed_qr_pid;
2480 queue_run_pipe = passed_qr_pipe;
2482 if (!mac_ismsgid(argv[i]))
2484 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2486 return EXIT_FAILURE;
2489 /* Set up $sending_ip_address and $sending_port */
2491 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2493 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2497 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2499 return EXIT_FAILURE;
2502 if (running_in_test_harness) millisleep(500);
2506 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2507 precedes -MC (see above). The flag indicates that the host to which
2508 Exim is connected has accepted an AUTH sequence. */
2510 else if (Ustrcmp(argrest, "CA") == 0)
2512 smtp_authenticated = TRUE;
2516 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2517 it preceded -MC (see above) */
2519 else if (Ustrcmp(argrest, "CP") == 0)
2521 smtp_use_pipelining = TRUE;
2525 /* -MCQ: pass on the pid of the queue-running process that started
2526 this chain of deliveries and the fd of its synchronizing pipe; this
2527 is useful only when it precedes -MC (see above) */
2529 else if (Ustrcmp(argrest, "CQ") == 0)
2531 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2533 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2538 /* -MCS: set the smtp_use_size flag; this is useful only when it
2539 precedes -MC (see above) */
2541 else if (Ustrcmp(argrest, "CS") == 0)
2543 smtp_use_size = TRUE;
2547 /* -MCT: set the tls_offered flag; this is useful only when it
2548 precedes -MC (see above). The flag indicates that the host to which
2549 Exim is connected has offered TLS support. */
2552 else if (Ustrcmp(argrest, "CT") == 0)
2559 /* -M[x]: various operations on the following list of message ids:
2560 -M deliver the messages, ignoring next retry times and thawing
2561 -Mc deliver the messages, checking next retry times, no thawing
2562 -Mf freeze the messages
2563 -Mg give up on the messages
2564 -Mt thaw the messages
2565 -Mrm remove the messages
2566 In the above cases, this must be the last option. There are also the
2567 following options which are followed by a single message id, and which
2568 act on that message. Some of them use the "recipient" addresses as well.
2569 -Mar add recipient(s)
2570 -Mmad mark all recipients delivered
2571 -Mmd mark recipients(s) delivered
2573 -Mset load a message for use with -be
2575 -Mvc show copy (of whole message, in RFC 2822 format)
2580 else if (*argrest == 0)
2582 msg_action = MSG_DELIVER;
2583 forced_delivery = deliver_force_thaw = TRUE;
2585 else if (Ustrcmp(argrest, "ar") == 0)
2587 msg_action = MSG_ADD_RECIPIENT;
2588 one_msg_action = TRUE;
2590 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2591 else if (Ustrcmp(argrest, "es") == 0)
2593 msg_action = MSG_EDIT_SENDER;
2594 one_msg_action = TRUE;
2596 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2597 else if (Ustrcmp(argrest, "g") == 0)
2599 msg_action = MSG_DELIVER;
2600 deliver_give_up = TRUE;
2602 else if (Ustrcmp(argrest, "mad") == 0)
2604 msg_action = MSG_MARK_ALL_DELIVERED;
2606 else if (Ustrcmp(argrest, "md") == 0)
2608 msg_action = MSG_MARK_DELIVERED;
2609 one_msg_action = TRUE;
2611 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2612 else if (Ustrcmp(argrest, "set") == 0)
2614 msg_action = MSG_LOAD;
2615 one_msg_action = TRUE;
2617 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2618 else if (Ustrcmp(argrest, "vb") == 0)
2620 msg_action = MSG_SHOW_BODY;
2621 one_msg_action = TRUE;
2623 else if (Ustrcmp(argrest, "vc") == 0)
2625 msg_action = MSG_SHOW_COPY;
2626 one_msg_action = TRUE;
2628 else if (Ustrcmp(argrest, "vh") == 0)
2630 msg_action = MSG_SHOW_HEADER;
2631 one_msg_action = TRUE;
2633 else if (Ustrcmp(argrest, "vl") == 0)
2635 msg_action = MSG_SHOW_LOG;
2636 one_msg_action = TRUE;
2638 else { badarg = TRUE; break; }
2640 /* All the -Mxx options require at least one message id. */
2642 msg_action_arg = i + 1;
2643 if (msg_action_arg >= argc)
2645 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2646 return EXIT_FAILURE;
2649 /* Some require only message ids to follow */
2651 if (!one_msg_action)
2654 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2656 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2658 return EXIT_FAILURE;
2660 goto END_ARG; /* Remaining args are ids */
2663 /* Others require only one message id, possibly followed by addresses,
2664 which will be handled as normal arguments. */
2668 if (!mac_ismsgid(argv[msg_action_arg]))
2670 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2671 argv[msg_action_arg], arg);
2672 return EXIT_FAILURE;
2679 /* Some programs seem to call the -om option without the leading o;
2680 for sendmail it askes for "me too". Exim always does this. */
2683 if (*argrest != 0) badarg = TRUE;
2687 /* -N: don't do delivery - a debugging option that stops transports doing
2688 their thing. It implies debugging at the D_v level. */
2693 dont_deliver = TRUE;
2694 debug_selector |= D_v;
2695 debug_file = stderr;
2701 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2707 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2708 option to the specified value. This form uses long names. We need to handle
2709 -O option=value and -Ooption=value. */
2716 fprintf(stderr, "exim: string expected after -O\n");
2724 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2727 if (*argrest == 'A')
2729 alias_arg = argrest + 1;
2730 if (alias_arg[0] == 0)
2732 if (i+1 < argc) alias_arg = argv[++i]; else
2734 fprintf(stderr, "exim: string expected after -oA\n");
2740 /* -oB: Set a connection message max value for remote deliveries */
2742 else if (*argrest == 'B')
2744 uschar *p = argrest + 1;
2747 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2749 connection_max_messages = 1;
2758 fprintf(stderr, "exim: number expected after -oB\n");
2761 connection_max_messages = Uatoi(p);
2765 /* -odb: background delivery */
2767 else if (Ustrcmp(argrest, "db") == 0)
2769 synchronous_delivery = FALSE;
2770 arg_queue_only = FALSE;
2771 queue_only_set = TRUE;
2774 /* -odf: foreground delivery (smail-compatible option); same effect as
2775 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2778 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2780 synchronous_delivery = TRUE;
2781 arg_queue_only = FALSE;
2782 queue_only_set = TRUE;
2785 /* -odq: queue only */
2787 else if (Ustrcmp(argrest, "dq") == 0)
2789 synchronous_delivery = FALSE;
2790 arg_queue_only = TRUE;
2791 queue_only_set = TRUE;
2794 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2795 but no remote delivery */
2797 else if (Ustrcmp(argrest, "dqs") == 0)
2800 arg_queue_only = FALSE;
2801 queue_only_set = TRUE;
2804 /* -oex: Sendmail error flags. As these are also accepted without the
2805 leading -o prefix, for compatibility with vacation and other callers,
2806 they are handled with -e above. */
2808 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2809 -oitrue: Another sendmail syntax for the same */
2811 else if (Ustrcmp(argrest, "i") == 0 ||
2812 Ustrcmp(argrest, "itrue") == 0)
2815 /* -oM*: Set various characteristics for an incoming message; actually
2816 acted on for trusted callers only. */
2818 else if (*argrest == 'M')
2822 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2826 /* -oMa: Set sender host address */
2828 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2830 /* -oMaa: Set authenticator name */
2832 else if (Ustrcmp(argrest, "Maa") == 0)
2833 sender_host_authenticated = argv[++i];
2835 /* -oMas: setting authenticated sender */
2837 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2839 /* -oMai: setting authenticated id */
2841 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2843 /* -oMi: Set incoming interface address */
2845 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2847 /* -oMr: Received protocol */
2849 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2851 /* -oMs: Set sender host name */
2853 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2855 /* -oMt: Set sender ident */
2857 else if (Ustrcmp(argrest, "Mt") == 0)
2859 sender_ident_set = TRUE;
2860 sender_ident = argv[++i];
2863 /* Else a bad argument */
2872 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2873 seem to call this as -m (undocumented), so that is also accepted (see
2876 else if (Ustrcmp(argrest, "m") == 0) {}
2878 /* -oo: An ancient flag for old-style addresses which still seems to
2879 crop up in some calls (see in SCO). */
2881 else if (Ustrcmp(argrest, "o") == 0) {}
2883 /* -oP <name>: set pid file path for daemon */
2885 else if (Ustrcmp(argrest, "P") == 0)
2886 override_pid_file_path = argv[++i];
2888 /* -or <n>: set timeout for non-SMTP acceptance
2889 -os <n>: set timeout for SMTP acceptance */
2891 else if (*argrest == 'r' || *argrest == 's')
2893 int *tp = (*argrest == 'r')?
2894 &arg_receive_timeout : &arg_smtp_receive_timeout;
2895 if (argrest[1] == 0)
2897 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2899 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2902 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2907 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2909 else if (Ustrcmp(argrest, "X") == 0)
2910 override_local_interfaces = argv[++i];
2912 /* Unknown -o argument */
2918 /* -ps: force Perl startup; -pd force delayed Perl startup */
2922 if (*argrest == 's' && argrest[1] == 0)
2924 perl_start_option = 1;
2927 if (*argrest == 'd' && argrest[1] == 0)
2929 perl_start_option = -1;
2934 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2935 which sets the host protocol and host name */
2939 if (i+1 < argc) argrest = argv[++i]; else
2940 { badarg = TRUE; break; }
2945 uschar *hn = Ustrchr(argrest, ':');
2948 received_protocol = argrest;
2952 received_protocol = string_copyn(argrest, hn - argrest);
2953 sender_host_name = hn + 1;
2960 receiving_message = FALSE;
2961 if (queue_interval >= 0)
2963 fprintf(stderr, "exim: -q specified more than once\n");
2967 /* -qq...: Do queue runs in a 2-stage manner */
2969 if (*argrest == 'q')
2971 queue_2stage = TRUE;
2975 /* -qi...: Do only first (initial) deliveries */
2977 if (*argrest == 'i')
2979 queue_run_first_delivery = TRUE;
2983 /* -qf...: Run the queue, forcing deliveries
2984 -qff..: Ditto, forcing thawing as well */
2986 if (*argrest == 'f')
2988 queue_run_force = TRUE;
2989 if (*(++argrest) == 'f')
2991 deliver_force_thaw = TRUE;
2996 /* -q[f][f]l...: Run the queue only on local deliveries */
2998 if (*argrest == 'l')
3000 queue_run_local = TRUE;
3004 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3005 optionally starting from a given message id. */
3007 if (*argrest == 0 &&
3008 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3011 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3012 start_queue_run_id = argv[++i];
3013 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3014 stop_queue_run_id = argv[++i];
3017 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3018 optionally local only. */
3023 queue_interval = readconf_readtime(argrest, 0, FALSE);
3025 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3026 if (queue_interval <= 0)
3028 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3035 case 'R': /* Synonymous with -qR... */
3036 receiving_message = FALSE;
3038 /* -Rf: As -R (below) but force all deliveries,
3039 -Rff: Ditto, but also thaw all frozen messages,
3040 -Rr: String is regex
3041 -Rrf: Regex and force
3042 -Rrff: Regex and force and thaw
3044 in all cases provided there are no further characters in this
3050 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3052 if (Ustrcmp(argrest, rsopts[i]) == 0)
3054 if (i != 2) queue_run_force = TRUE;
3055 if (i >= 2) deliver_selectstring_regex = TRUE;
3056 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3057 argrest += Ustrlen(rsopts[i]);
3062 /* -R: Set string to match in addresses for forced queue run to
3063 pick out particular messages. */
3067 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3069 fprintf(stderr, "exim: string expected after -R\n");
3073 else deliver_selectstring = argrest;
3077 /* -r: an obsolete synonym for -f (see above) */
3080 /* -S: Like -R but works on sender. */
3082 case 'S': /* Synonymous with -qS... */
3083 receiving_message = FALSE;
3085 /* -Sf: As -S (below) but force all deliveries,
3086 -Sff: Ditto, but also thaw all frozen messages,
3087 -Sr: String is regex
3088 -Srf: Regex and force
3089 -Srff: Regex and force and thaw
3091 in all cases provided there are no further characters in this
3097 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3099 if (Ustrcmp(argrest, rsopts[i]) == 0)
3101 if (i != 2) queue_run_force = TRUE;
3102 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3103 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3104 argrest += Ustrlen(rsopts[i]);
3109 /* -S: Set string to match in addresses for forced queue run to
3110 pick out particular messages. */
3114 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3116 fprintf(stderr, "exim: string expected after -S\n");
3120 else deliver_selectstring_sender = argrest;
3123 /* -Tqt is an option that is exclusively for use by the testing suite.
3124 It is not recognized in other circumstances. It allows for the setting up
3125 of explicit "queue times" so that various warning/retry things can be
3126 tested. Otherwise variability of clock ticks etc. cause problems. */
3129 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3130 fudged_queue_times = argv[++i];
3135 /* -t: Set flag to extract recipients from body of message. */
3138 if (*argrest == 0) extract_recipients = TRUE;
3140 /* -ti: Set flag to extract recipients from body of message, and also
3141 specify that dot does not end the message. */
3143 else if (Ustrcmp(argrest, "i") == 0)
3145 extract_recipients = TRUE;
3149 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3152 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3159 /* -U: This means "initial user submission" in sendmail, apparently. The
3160 doc claims that in future sendmail may refuse syntactically invalid
3161 messages instead of fixing them. For the moment, we just ignore it. */
3167 /* -v: verify things - this is a very low-level debugging */
3172 debug_selector |= D_v;
3173 debug_file = stderr;
3179 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3181 The -x flag tells the sendmail command that mail from a local
3182 mail program has National Language Support (NLS) extended characters
3183 in the body of the mail item. The sendmail command can send mail with
3184 extended NLS characters across networks that normally corrupts these
3187 As Exim is 8-bit clean, it just ignores this flag. */
3190 if (*argrest != 0) badarg = TRUE;
3193 /* All other initial characters are errors */
3198 } /* End of high-level switch statement */
3200 /* Failed to recognize the option, or syntax error */
3204 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3205 "option %s\n", arg);
3211 /* If -R or -S have been specified without -q, assume a single queue run. */
3213 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3214 queue_interval < 0) queue_interval = 0;
3218 /* If usage_wanted is set we call the usage function - which never returns */
3219 if (usage_wanted) exim_usage(called_as);
3221 /* Arguments have been processed. Check for incompatibilities. */
3223 (smtp_input || extract_recipients || recipients_arg < argc) &&
3224 (daemon_listen || queue_interval >= 0 || bi_option ||
3225 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3226 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3229 msg_action_arg > 0 &&
3230 (daemon_listen || queue_interval >= 0 || list_options ||
3231 (checking && msg_action != MSG_LOAD) ||
3232 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3235 (daemon_listen || queue_interval >= 0) &&
3236 (sender_address != NULL || list_options || list_queue || checking ||
3240 daemon_listen && queue_interval == 0
3243 inetd_wait_mode && queue_interval >= 0
3247 (checking || smtp_input || extract_recipients ||
3248 filter_test != FTEST_NONE || bi_option)
3251 verify_address_mode &&
3252 (address_test_mode || smtp_input || extract_recipients ||
3253 filter_test != FTEST_NONE || bi_option)
3256 address_test_mode && (smtp_input || extract_recipients ||
3257 filter_test != FTEST_NONE || bi_option)
3260 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3264 deliver_selectstring != NULL && queue_interval < 0
3267 msg_action == MSG_LOAD &&
3268 (!expansion_test || expansion_test_message != NULL)
3272 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3276 /* If debugging is set up, set the file and the file descriptor to pass on to
3277 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3278 to run in the foreground. */
3280 if (debug_selector != 0)
3282 debug_file = stderr;
3283 debug_fd = fileno(debug_file);
3284 background_daemon = FALSE;
3285 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3286 if (debug_selector != D_v) /* -v only doesn't show this */
3288 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3289 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3291 if (!version_printed)
3292 show_whats_supported(stderr);
3296 /* When started with root privilege, ensure that the limits on the number of
3297 open files and the number of processes (where that is accessible) are
3298 sufficiently large, or are unset, in case Exim has been called from an
3299 environment where the limits are screwed down. Not all OS have the ability to
3300 change some of these limits. */
3304 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3310 #ifdef RLIMIT_NOFILE
3311 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3313 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3315 rlp.rlim_cur = rlp.rlim_max = 0;
3318 /* I originally chose 1000 as a nice big number that was unlikely to
3319 be exceeded. It turns out that some older OS have a fixed upper limit of
3322 if (rlp.rlim_cur < 1000)
3324 rlp.rlim_cur = rlp.rlim_max = 1000;
3325 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3327 rlp.rlim_cur = rlp.rlim_max = 256;
3328 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3329 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3336 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3338 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3340 rlp.rlim_cur = rlp.rlim_max = 0;
3343 #ifdef RLIM_INFINITY
3344 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3346 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3348 if (rlp.rlim_cur < 1000)
3350 rlp.rlim_cur = rlp.rlim_max = 1000;
3352 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3353 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3359 /* Exim is normally entered as root (but some special configurations are
3360 possible that don't do this). However, it always spins off sub-processes that
3361 set their uid and gid as required for local delivery. We don't want to pass on
3362 any extra groups that root may belong to, so we want to get rid of them all at
3365 We need to obey setgroups() at this stage, before possibly giving up root
3366 privilege for a changed configuration file, but later on we might need to
3367 check on the additional groups for the admin user privilege - can't do that
3368 till after reading the config, which might specify the exim gid. Therefore,
3369 save the group list here first. */
3371 group_count = getgroups(NGROUPS_MAX, group_list);
3372 if (group_count < 0)
3374 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3378 /* There is a fundamental difference in some BSD systems in the matter of
3379 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3380 known not to be different. On the "different" systems there is a single group
3381 list, and the first entry in it is the current group. On all other versions of
3382 Unix there is a supplementary group list, which is in *addition* to the current
3383 group. Consequently, to get rid of all extraneous groups on a "standard" system
3384 you pass over 0 groups to setgroups(), while on a "different" system you pass
3385 over a single group - the current group, which is always the first group in the
3386 list. Calling setgroups() with zero groups on a "different" system results in
3387 an error return. The following code should cope with both types of system.
3389 However, if this process isn't running as root, setgroups() can't be used
3390 since you have to be root to run it, even if throwing away groups. Not being
3391 root here happens only in some unusual configurations. We just ignore the
3394 if (setgroups(0, NULL) != 0)
3396 if (setgroups(1, group_list) != 0 && !unprivileged)
3398 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3403 /* If the configuration file name has been altered by an argument on the
3404 command line (either a new file name or a macro definition) and the caller is
3405 not root, or if this is a filter testing run, remove any setuid privilege the
3406 program has and run as the underlying user.
3408 The exim user is locked out of this, which severely restricts the use of -C
3411 Otherwise, set the real ids to the effective values (should be root unless run
3412 from inetd, which it can either be root or the exim uid, if one is configured).
3414 There is a private mechanism for bypassing some of this, in order to make it
3415 possible to test lots of configurations automatically, without having either to
3416 recompile each time, or to patch in an actual configuration file name and other
3417 values (such as the path name). If running in the test harness, pretend that
3418 configuration file changes and macro definitions haven't happened. */
3421 (!trusted_config || /* Config changed, or */
3422 !macros_trusted()) && /* impermissible macros and */
3423 real_uid != root_uid && /* Not root, and */
3424 !running_in_test_harness /* Not fudged */
3426 expansion_test /* expansion testing */
3428 filter_test != FTEST_NONE) /* Filter testing */
3430 setgroups(group_count, group_list);
3431 exim_setugid(real_uid, real_gid, FALSE,
3432 US"-C, -D, -be or -bf forces real uid");
3433 removed_privilege = TRUE;
3435 /* In the normal case when Exim is called like this, stderr is available
3436 and should be used for any logging information because attempts to write
3437 to the log will usually fail. To arrange this, we unset really_exim. However,
3438 if no stderr is available there is no point - we might as well have a go
3439 at the log (if it fails, syslog will be written).
3441 Note that if the invoker is Exim, the logs remain available. Messing with
3442 this causes unlogged successful deliveries. */
3444 if ((log_stderr != NULL) && (real_uid != exim_uid))
3445 really_exim = FALSE;
3448 /* Privilege is to be retained for the moment. It may be dropped later,
3449 depending on the job that this Exim process has been asked to do. For now, set
3450 the real uid to the effective so that subsequent re-execs of Exim are done by a
3453 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3455 /* If testing a filter, open the file(s) now, before wasting time doing other
3456 setups and reading the message. */
3458 if ((filter_test & FTEST_SYSTEM) != 0)
3460 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3463 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3465 return EXIT_FAILURE;
3469 if ((filter_test & FTEST_USER) != 0)
3471 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3474 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3476 return EXIT_FAILURE;
3480 /* Initialise lookup_list
3481 If debugging, already called above via version reporting.
3482 In either case, we initialise the list of available lookups while running
3483 as root. All dynamically modules are loaded from a directory which is
3484 hard-coded into the binary and is code which, if not a module, would be
3485 part of Exim already. Ability to modify the content of the directory
3486 is equivalent to the ability to modify a setuid binary!
3488 This needs to happen before we read the main configuration. */
3491 /* Read the main runtime configuration data; this gives up if there
3492 is a failure. It leaves the configuration file open so that the subsequent
3493 configuration data for delivery can be read if needed. */
3497 /* Handle the decoding of logging options. */
3499 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3500 log_selector_string, log_options, log_options_count, US"log", 0);
3504 debug_printf("configuration file is %s\n", config_main_filename);
3505 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3506 log_extra_selector);
3509 /* If domain literals are not allowed, check the sender address that was
3510 supplied with -f. Ditto for a stripped trailing dot. */
3512 if (sender_address != NULL)
3514 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3516 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3517 "allowed\n", sender_address);
3518 return EXIT_FAILURE;
3520 if (f_end_dot && !strip_trailing_dot)
3522 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3523 "(trailing dot not allowed)\n", sender_address);
3524 return EXIT_FAILURE;
3528 /* Paranoia check of maximum lengths of certain strings. There is a check
3529 on the length of the log file path in log.c, which will come into effect
3530 if there are any calls to write the log earlier than this. However, if we
3531 get this far but the string is very long, it is better to stop now than to
3532 carry on and (e.g.) receive a message and then have to collapse. The call to
3533 log_write() from here will cause the ultimate panic collapse if the complete
3534 file name exceeds the buffer length. */
3536 if (Ustrlen(log_file_path) > 200)
3537 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3538 "log_file_path is longer than 200 chars: aborting");
3540 if (Ustrlen(pid_file_path) > 200)
3541 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3542 "pid_file_path is longer than 200 chars: aborting");
3544 if (Ustrlen(spool_directory) > 200)
3545 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3546 "spool_directory is longer than 200 chars: aborting");
3548 /* Length check on the process name given to syslog for its TAG field,
3549 which is only permitted to be 32 characters or less. See RFC 3164. */
3551 if (Ustrlen(syslog_processname) > 32)
3552 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3553 "syslog_processname is longer than 32 chars: aborting");
3555 /* In some operating systems, the environment variable TMPDIR controls where
3556 temporary files are created; Exim doesn't use these (apart from when delivering
3557 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3558 If TMPDIR is found in the environment, reset it to the value defined in the
3559 TMPDIR macro, if this macro is defined. */
3564 for (p = USS environ; *p != NULL; p++)
3566 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3567 Ustrcmp(*p+7, TMPDIR) != 0)
3569 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3570 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3572 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3578 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3579 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3580 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3581 called by a user who has set the TZ variable. This then affects the timestamps
3582 in log files and in Received: headers, and any created Date: header lines. The
3583 required timezone is settable in the configuration file, so nothing can be done
3584 about this earlier - but hopefully nothing will normally be logged earlier than
3585 this. We have to make a new environment if TZ is wrong, but don't bother if
3586 timestamps_utc is set, because then all times are in UTC anyway. */
3588 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3590 timestamps_utc = TRUE;
3594 uschar *envtz = US getenv("TZ");
3595 if ((envtz == NULL && timezone_string != NULL) ||
3597 (timezone_string == NULL ||
3598 Ustrcmp(timezone_string, envtz) != 0)))
3600 uschar **p = USS environ;
3604 while (*p++ != NULL) count++;
3605 if (envtz == NULL) count++;
3606 newp = new = malloc(sizeof(uschar *) * (count + 1));
3607 for (p = USS environ; *p != NULL; p++)
3609 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3612 if (timezone_string != NULL)
3614 *newp = malloc(Ustrlen(timezone_string) + 4);
3615 sprintf(CS *newp++, "TZ=%s", timezone_string);
3620 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3621 tod_stamp(tod_log));
3625 /* Handle the case when we have removed the setuid privilege because of -C or
3626 -D. This means that the caller of Exim was not root.
3628 There is a problem if we were running as the Exim user. The sysadmin may
3629 expect this case to retain privilege because "the binary was called by the
3630 Exim user", but it hasn't, because either the -D option set macros, or the
3631 -C option set a non-trusted configuration file. There are two possibilities:
3633 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3634 to do message deliveries. Thus, the fact that it is running as a
3635 non-privileged user is plausible, and might be wanted in some special
3636 configurations. However, really_exim will have been set false when
3637 privilege was dropped, to stop Exim trying to write to its normal log
3638 files. Therefore, re-enable normal log processing, assuming the sysadmin
3639 has set up the log directory correctly.
3641 (2) If deliver_drop_privilege is not set, the configuration won't work as
3642 apparently intended, and so we log a panic message. In order to retain
3643 root for -C or -D, the caller must either be root or be invoking a
3644 trusted configuration file (when deliver_drop_privilege is false). */
3646 if (removed_privilege && (!trusted_config || macros != NULL) &&
3647 real_uid == exim_uid)
3649 if (deliver_drop_privilege)
3650 really_exim = TRUE; /* let logging work normally */
3652 log_write(0, LOG_MAIN|LOG_PANIC,
3653 "exim user lost privilege for using %s option",
3654 trusted_config? "-D" : "-C");
3657 /* Start up Perl interpreter if Perl support is configured and there is a
3658 perl_startup option, and the configuration or the command line specifies
3659 initializing starting. Note that the global variables are actually called
3660 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3663 if (perl_start_option != 0)
3664 opt_perl_at_start = (perl_start_option > 0);
3665 if (opt_perl_at_start && opt_perl_startup != NULL)
3668 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3669 errstr = init_perl(opt_perl_startup);
3672 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3673 return EXIT_FAILURE;
3675 opt_perl_started = TRUE;
3677 #endif /* EXIM_PERL */
3679 /* Log the arguments of the call if the configuration file said so. This is
3680 a debugging feature for finding out what arguments certain MUAs actually use.
3681 Don't attempt it if logging is disabled, or if listing variables or if
3682 verifying/testing addresses or expansions. */
3684 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3685 && really_exim && !list_options && !checking)
3688 uschar *p = big_buffer;
3690 (void)getcwd(CS p+4, big_buffer_size - 4);
3692 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3694 for (i = 0; i < argc; i++)
3696 int len = Ustrlen(argv[i]);
3699 if (p + len + 8 >= big_buffer + big_buffer_size)
3702 log_write(0, LOG_MAIN, "%s", big_buffer);
3703 Ustrcpy(big_buffer, "...");
3706 printing = string_printing(argv[i]);
3707 if (printing[0] == 0) quote = US"\""; else
3709 uschar *pp = printing;
3711 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3713 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3714 (p - big_buffer) - 4), printing, quote);
3718 if ((log_extra_selector & LX_arguments) != 0)
3719 log_write(0, LOG_MAIN, "%s", big_buffer);
3721 debug_printf("%s\n", big_buffer);
3724 /* Set the working directory to be the top-level spool directory. We don't rely
3725 on this in the code, which always uses fully qualified names, but it's useful
3726 for core dumps etc. Don't complain if it fails - the spool directory might not
3727 be generally accessible and calls with the -C option (and others) have lost
3728 privilege by now. Before the chdir, we try to ensure that the directory exists.
3731 if (Uchdir(spool_directory) != 0)
3733 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3734 (void)Uchdir(spool_directory);
3737 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3738 alias file. Exim doesn't have such a concept, but this call is screwed into
3739 Sun's YP makefiles. Handle this by calling a configured script, as the real
3740 user who called Exim. The -oA option can be used to pass an argument to the
3745 (void)fclose(config_file);
3746 if (bi_command != NULL)
3750 argv[i++] = bi_command;
3751 if (alias_arg != NULL) argv[i++] = alias_arg;
3754 setgroups(group_count, group_list);
3755 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3757 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3758 (argv[1] == NULL)? US"" : argv[1]);
3760 execv(CS argv[0], (char *const *)argv);
3761 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3766 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3771 /* If an action on specific messages is requested, or if a daemon or queue
3772 runner is being started, we need to know if Exim was called by an admin user.
3773 This is the case if the real user is root or exim, or if the real group is
3774 exim, or if one of the supplementary groups is exim or a group listed in
3775 admin_groups. We don't fail all message actions immediately if not admin_user,
3776 since some actions can be performed by non-admin users. Instead, set admin_user
3777 for later interrogation. */
3779 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3784 for (i = 0; i < group_count; i++)
3786 if (group_list[i] == exim_gid) admin_user = TRUE;
3787 else if (admin_groups != NULL)
3789 for (j = 1; j <= (int)(admin_groups[0]); j++)
3790 if (admin_groups[j] == group_list[i])
3791 { admin_user = TRUE; break; }
3793 if (admin_user) break;
3797 /* Another group of privileged users are the trusted users. These are root,
3798 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3799 are permitted to specify sender_addresses with -f on the command line, and
3800 other message parameters as well. */
3802 if (real_uid == root_uid || real_uid == exim_uid)
3803 trusted_caller = TRUE;
3808 if (trusted_users != NULL)
3810 for (i = 1; i <= (int)(trusted_users[0]); i++)
3811 if (trusted_users[i] == real_uid)
3812 { trusted_caller = TRUE; break; }
3815 if (!trusted_caller && trusted_groups != NULL)
3817 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3819 if (trusted_groups[i] == real_gid)
3820 trusted_caller = TRUE;
3821 else for (j = 0; j < group_count; j++)
3823 if (trusted_groups[i] == group_list[j])
3824 { trusted_caller = TRUE; break; }
3826 if (trusted_caller) break;
3831 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3832 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3834 /* Only an admin user may start the daemon or force a queue run in the default
3835 configuration, but the queue run restriction can be relaxed. Only an admin
3836 user may request that a message be returned to its sender forthwith. Only an
3837 admin user may specify a debug level greater than D_v (because it might show
3838 passwords, etc. in lookup queries). Only an admin user may request a queue
3839 count. Only an admin user can use the test interface to scan for email
3840 (because Exim will be in the spool dir and able to look at mails). */
3844 BOOL debugset = (debug_selector & ~D_v) != 0;
3845 if (deliver_give_up || daemon_listen || malware_test_file ||
3846 (count_queue && queue_list_requires_admin) ||
3847 (list_queue && queue_list_requires_admin) ||
3848 (queue_interval >= 0 && prod_requires_admin) ||
3849 (debugset && !running_in_test_harness))
3851 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3856 /* If the real user is not root or the exim uid, the argument for passing
3857 in an open TCP/IP connection for another message is not permitted, nor is
3858 running with the -N option for any delivery action, unless this call to exim is
3859 one that supplied an input message, or we are using a patched exim for
3860 regression testing. */
3862 if (real_uid != root_uid && real_uid != exim_uid &&
3863 (continue_hostname != NULL ||
3865 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3866 )) && !running_in_test_harness)
3868 fprintf(stderr, "exim: Permission denied\n");
3869 return EXIT_FAILURE;
3872 /* If the caller is not trusted, certain arguments are ignored when running for
3873 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3874 Note that authority for performing certain actions on messages is tested in the
3875 queue_action() function. */
3877 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3879 sender_host_name = sender_host_address = interface_address =
3880 sender_ident = received_protocol = NULL;
3881 sender_host_port = interface_port = 0;
3882 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3885 /* If a sender host address is set, extract the optional port number off the
3886 end of it and check its syntax. Do the same thing for the interface address.
3887 Exim exits if the syntax is bad. */
3891 if (sender_host_address != NULL)
3892 sender_host_port = check_port(sender_host_address);
3893 if (interface_address != NULL)
3894 interface_port = check_port(interface_address);
3897 /* If an SMTP message is being received check to see if the standard input is a
3898 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3899 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3904 union sockaddr_46 inetd_sock;
3905 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3906 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3908 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3909 if (family == AF_INET || family == AF_INET6)
3911 union sockaddr_46 interface_sock;
3912 size = sizeof(interface_sock);
3914 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3915 interface_address = host_ntoa(-1, &interface_sock, NULL,
3918 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3920 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3923 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3924 NULL, &sender_host_port);
3925 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3926 "inetd is not supported when mua_wrapper is set");
3931 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3932 return EXIT_FAILURE;
3938 /* If the load average is going to be needed while receiving a message, get it
3939 now for those OS that require the first call to os_getloadavg() to be done as
3940 root. There will be further calls later for each message received. */
3942 #ifdef LOAD_AVG_NEEDS_ROOT
3943 if (receiving_message &&
3944 (queue_only_load >= 0 ||
3945 (is_inetd && smtp_load_reserve >= 0)
3948 load_average = OS_GETLOADAVG();
3952 /* The queue_only configuration option can be overridden by -odx on the command
3953 line, except that if queue_only_override is false, queue_only cannot be unset
3954 from the command line. */
3956 if (queue_only_set && (queue_only_override || arg_queue_only))
3957 queue_only = arg_queue_only;
3959 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3962 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3963 if (arg_smtp_receive_timeout >= 0)
3964 smtp_receive_timeout = arg_smtp_receive_timeout;
3966 /* If Exim was started with root privilege, unless we have already removed the
3967 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3968 except when starting the daemon or doing some kind of delivery or address
3969 testing (-bt). These are the only cases when root need to be retained. We run
3970 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3971 retained only for starting the daemon. We always do the initgroups() in this
3972 situation (controlled by the TRUE below), in order to be as close as possible
3973 to the state Exim usually runs in. */
3975 if (!unprivileged && /* originally had root AND */
3976 !removed_privilege && /* still got root AND */
3977 !daemon_listen && /* not starting the daemon */
3978 queue_interval <= 0 && /* (either kind of daemon) */
3980 deliver_drop_privilege || /* requested unprivileged */
3982 queue_interval < 0 && /* not running the queue */
3983 (msg_action_arg < 0 || /* and */
3984 msg_action != MSG_DELIVER) && /* not delivering and */
3985 (!checking || !address_test_mode) /* not address checking */
3989 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3992 /* When we are retaining a privileged uid, we still change to the exim gid. */
3997 rv = setgid(exim_gid);
3998 /* Impact of failure is that some stuff might end up with an incorrect group.
3999 We track this for failures from root, since any attempt to change privilege
4000 by root should succeed and failures should be examined. For non-root,
4001 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4002 no need to complain then. */
4005 if (!(unprivileged || removed_privilege))
4008 "exim: changing group failed: %s\n", strerror(errno));
4012 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4013 (long int)exim_gid, strerror(errno));
4017 /* Handle a request to scan a file for malware */
4018 if (malware_test_file)
4020 #ifdef WITH_CONTENT_SCAN
4022 set_process_info("scanning file for malware");
4023 result = malware_in_file(malware_test_file);
4026 printf("No malware found.\n");
4031 printf("Malware lookup returned non-okay/fail: %d\n", result);
4035 printf("Malware found: %s\n", malware_name);
4037 printf("Malware scan detected malware of unknown name.\n");
4039 printf("Malware scanning not enabled at compile time.\n");
4044 /* Handle a request to list the delivery queue */
4048 set_process_info("listing the queue");
4049 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4053 /* Handle a request to count the delivery queue */
4057 set_process_info("counting the queue");
4062 /* Handle actions on specific messages, except for the force delivery and
4063 message load actions, which are done below. Some actions take a whole list of
4064 message ids, which are known to continue up to the end of the arguments. Others
4065 take a single message id and then operate on the recipients list. */
4067 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4069 int yield = EXIT_SUCCESS;
4070 set_process_info("acting on specified messages");
4072 if (!one_msg_action)
4074 for (i = msg_action_arg; i < argc; i++)
4075 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4076 yield = EXIT_FAILURE;
4079 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4080 recipients_arg)) yield = EXIT_FAILURE;
4084 /* All the modes below here require the remaining configuration sections
4085 to be read, except that we can skip over the ACL setting when delivering
4086 specific messages, or doing a queue run. (For various testing cases we could
4087 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4090 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4092 /* The configuration data will have been read into POOL_PERM because we won't
4093 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4094 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4095 configuration were read into POOL_MAIN, because we don't do any resets till
4096 later on. However, it seems right, and it does ensure that both pools get used.
4099 store_pool = POOL_MAIN;
4101 /* Handle the -brt option. This is for checking out retry configurations.
4102 The next three arguments are a domain name or a complete address, and
4103 optionally two error numbers. All it does is to call the function that
4104 scans the retry configuration data. */
4106 if (test_retry_arg >= 0)
4108 retry_config *yield;
4109 int basic_errno = 0;
4113 if (test_retry_arg >= argc)
4115 printf("-brt needs a domain or address argument\n");
4116 exim_exit(EXIT_FAILURE);
4118 s1 = argv[test_retry_arg++];
4121 /* If the first argument contains no @ and no . it might be a local user
4122 or it might be a single-component name. Treat as a domain. */
4124 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4126 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4127 "being \ntreated as a one-component domain, not as a local part.\n\n",
4131 /* There may be an optional second domain arg. */
4133 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4134 s2 = argv[test_retry_arg++];
4136 /* The final arg is an error name */
4138 if (test_retry_arg < argc)
4140 uschar *ss = argv[test_retry_arg];
4142 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4145 printf("%s\n", CS error);
4146 return EXIT_FAILURE;
4149 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4150 code > 100 as an error is for matching codes to the decade. Turn them into
4151 a real error code, off the decade. */
4153 if (basic_errno == ERRNO_MAIL4XX ||
4154 basic_errno == ERRNO_RCPT4XX ||
4155 basic_errno == ERRNO_DATA4XX)
4157 int code = (more_errno >> 8) & 255;
4159 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4160 else if (code > 100)
4161 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4165 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4166 if (yield == NULL) printf("No retry information found\n"); else
4169 more_errno = yield->more_errno;
4170 printf("Retry rule: %s ", yield->pattern);
4172 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4174 printf("quota%s%s ",
4175 (more_errno > 0)? "_" : "",
4176 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4178 else if (yield->basic_errno == ECONNREFUSED)
4180 printf("refused%s%s ",
4181 (more_errno > 0)? "_" : "",
4182 (more_errno == 'M')? "MX" :
4183 (more_errno == 'A')? "A" : "");
4185 else if (yield->basic_errno == ETIMEDOUT)
4188 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4190 if (more_errno != 0) printf("_%s",
4191 (more_errno == 'M')? "MX" : "A");
4194 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4195 printf("auth_failed ");
4198 for (r = yield->rules; r != NULL; r = r->next)
4200 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4201 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4207 printf(",%d.", x/1000);
4221 exim_exit(EXIT_SUCCESS);
4224 /* Handle a request to list one or more configuration options */
4228 set_process_info("listing variables");
4229 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4230 else for (i = recipients_arg; i < argc; i++)
4233 (Ustrcmp(argv[i], "router") == 0 ||
4234 Ustrcmp(argv[i], "transport") == 0 ||
4235 Ustrcmp(argv[i], "authenticator") == 0 ||
4236 Ustrcmp(argv[i], "macro") == 0))
4238 readconf_print(argv[i+1], argv[i]);
4241 else readconf_print(argv[i], NULL);
4243 exim_exit(EXIT_SUCCESS);
4247 /* Handle a request to deliver one or more messages that are already on the
4248 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4249 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4251 Delivery of specific messages is typically used for a small number when
4252 prodding by hand (when the option forced_delivery will be set) or when
4253 re-execing to regain root privilege. Each message delivery must happen in a
4254 separate process, so we fork a process for each one, and run them sequentially
4255 so that debugging output doesn't get intertwined, and to avoid spawning too
4256 many processes if a long list is given. However, don't fork for the last one;
4257 this saves a process in the common case when Exim is called to deliver just one
4260 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4262 if (prod_requires_admin && !admin_user)
4264 fprintf(stderr, "exim: Permission denied\n");
4265 exim_exit(EXIT_FAILURE);
4267 set_process_info("delivering specified messages");
4268 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4269 for (i = msg_action_arg; i < argc; i++)
4274 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4275 else if ((pid = fork()) == 0)
4277 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4278 _exit(EXIT_SUCCESS);
4282 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4284 exim_exit(EXIT_FAILURE);
4288 exim_exit(EXIT_SUCCESS);
4292 /* If only a single queue run is requested, without SMTP listening, we can just
4293 turn into a queue runner, with an optional starting message id. */
4295 if (queue_interval == 0 && !daemon_listen)
4297 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4298 (start_queue_run_id == NULL)? US"" : US" starting at ",
4299 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4300 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4301 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4302 set_process_info("running the queue (single queue run)");
4303 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4304 exim_exit(EXIT_SUCCESS);
4308 /* Find the login name of the real user running this process. This is always
4309 needed when receiving a message, because it is written into the spool file. It
4310 may also be used to construct a from: or a sender: header, and in this case we
4311 need the user's full name as well, so save a copy of it, checked for RFC822
4312 syntax and munged if necessary, if it hasn't previously been set by the -F
4313 argument. We may try to get the passwd entry more than once, in case NIS or
4314 other delays are in evidence. Save the home directory for use in filter testing
4319 if ((pw = getpwuid(real_uid)) != NULL)
4321 originator_login = string_copy(US pw->pw_name);
4322 originator_home = string_copy(US pw->pw_dir);
4324 /* If user name has not been set by -F, set it from the passwd entry
4325 unless -f has been used to set the sender address by a trusted user. */
4327 if (originator_name == NULL)
4329 if (sender_address == NULL ||
4330 (!trusted_caller && filter_test == FTEST_NONE))
4332 uschar *name = US pw->pw_gecos;
4333 uschar *amp = Ustrchr(name, '&');
4336 /* Most Unix specify that a '&' character in the gecos field is
4337 replaced by a copy of the login name, and some even specify that
4338 the first character should be upper cased, so that's what we do. */
4343 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4344 amp - name, name, &loffset, originator_login, amp + 1);
4345 buffer[loffset] = toupper(buffer[loffset]);
4349 /* If a pattern for matching the gecos field was supplied, apply
4350 it and then expand the name string. */
4352 if (gecos_pattern != NULL && gecos_name != NULL)
4355 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4357 if (regex_match_and_setup(re, name, 0, -1))
4359 uschar *new_name = expand_string(gecos_name);
4361 if (new_name != NULL)
4363 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4364 "gecos field \"%s\"\n", new_name, name);
4367 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4368 "\"%s\": %s\n", gecos_name, expand_string_message);
4370 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4371 "gecos field \"%s\"\n", gecos_pattern, name);
4372 store_free((void *)re);
4374 originator_name = string_copy(name);
4377 /* A trusted caller has used -f but not -F */
4379 else originator_name = US"";
4382 /* Break the retry loop */
4387 if (++i > finduser_retries) break;
4391 /* If we cannot get a user login, log the incident and give up, unless the
4392 configuration specifies something to use. When running in the test harness,
4393 any setting of unknown_login overrides the actual name. */
4395 if (originator_login == NULL || running_in_test_harness)
4397 if (unknown_login != NULL)
4399 originator_login = expand_string(unknown_login);
4400 if (originator_name == NULL && unknown_username != NULL)
4401 originator_name = expand_string(unknown_username);
4402 if (originator_name == NULL) originator_name = US"";
4404 if (originator_login == NULL)
4405 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4409 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4412 originator_name = string_copy(parse_fix_phrase(originator_name,
4413 Ustrlen(originator_name), big_buffer, big_buffer_size));
4415 /* If a message is created by this call of Exim, the uid/gid of its originator
4416 are those of the caller. These values are overridden if an existing message is
4417 read in from the spool. */
4419 originator_uid = real_uid;
4420 originator_gid = real_gid;
4422 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4423 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4425 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4426 returns. We leave this till here so that the originator_ fields are available
4427 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4430 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4434 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4435 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4436 "mua_wrapper is set");
4441 /* If the sender ident has not been set (by a trusted caller) set it to
4442 the caller. This will get overwritten below for an inetd call. If a trusted
4443 caller has set it empty, unset it. */
4445 if (sender_ident == NULL) sender_ident = originator_login;
4446 else if (sender_ident[0] == 0) sender_ident = NULL;
4448 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4449 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4450 originator_* variables set. */
4452 if (test_rewrite_arg >= 0)
4454 really_exim = FALSE;
4455 if (test_rewrite_arg >= argc)
4457 printf("-brw needs an address argument\n");
4458 exim_exit(EXIT_FAILURE);
4460 rewrite_test(argv[test_rewrite_arg]);
4461 exim_exit(EXIT_SUCCESS);
4464 /* A locally-supplied message is considered to be coming from a local user
4465 unless a trusted caller supplies a sender address with -f, or is passing in the
4466 message via SMTP (inetd invocation or otherwise). */
4468 if ((sender_address == NULL && !smtp_input) ||
4469 (!trusted_caller && filter_test == FTEST_NONE))
4471 sender_local = TRUE;
4473 /* A trusted caller can supply authenticated_sender and authenticated_id
4474 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4475 defaults except when host checking. */
4477 if (authenticated_sender == NULL && !host_checking)
4478 authenticated_sender = string_sprintf("%s@%s", originator_login,
4479 qualify_domain_sender);
4480 if (authenticated_id == NULL && !host_checking)
4481 authenticated_id = originator_login;
4484 /* Trusted callers are always permitted to specify the sender address.
4485 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4486 is specified is the empty address. However, if a trusted caller does not
4487 specify a sender address for SMTP input, we leave sender_address unset. This
4488 causes the MAIL commands to be honoured. */
4490 if ((!smtp_input && sender_address == NULL) ||
4491 !receive_check_set_sender(sender_address))
4493 /* Either the caller is not permitted to set a general sender, or this is
4494 non-SMTP input and the trusted caller has not set a sender. If there is no
4495 sender, or if a sender other than <> is set, override with the originator's
4496 login (which will get qualified below), except when checking things. */
4498 if (sender_address == NULL /* No sender_address set */
4500 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4501 !checking && /* Not running tests, AND */
4502 filter_test == FTEST_NONE)) /* Not testing a filter */
4504 sender_address = originator_login;
4505 sender_address_forced = FALSE;
4506 sender_address_domain = 0;
4510 /* Remember whether an untrusted caller set the sender address */
4512 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4514 /* Ensure that the sender address is fully qualified unless it is the empty
4515 address, which indicates an error message, or doesn't exist (root caller, smtp
4516 interface, no -f argument). */
4518 if (sender_address != NULL && sender_address[0] != 0 &&
4519 sender_address_domain == 0)
4520 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4521 qualify_domain_sender);
4523 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4525 /* Handle a request to verify a list of addresses, or test them for delivery.
4526 This must follow the setting of the sender address, since routers can be
4527 predicated upon the sender. If no arguments are given, read addresses from
4528 stdin. Set debug_level to at least D_v to get full output for address testing.
4531 if (verify_address_mode || address_test_mode)
4534 int flags = vopt_qualify;
4536 if (verify_address_mode)
4538 if (!verify_as_sender) flags |= vopt_is_recipient;
4539 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4544 flags |= vopt_is_recipient;
4545 debug_selector |= D_v;
4546 debug_file = stderr;
4547 debug_fd = fileno(debug_file);
4548 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4551 if (recipients_arg < argc)
4553 while (recipients_arg < argc)
4555 uschar *s = argv[recipients_arg++];
4558 BOOL finished = FALSE;
4559 uschar *ss = parse_find_address_end(s, FALSE);
4560 if (*ss == ',') *ss = 0; else finished = TRUE;
4561 test_address(s, flags, &exit_value);
4564 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4571 uschar *s = get_stdinput(NULL, NULL);
4572 if (s == NULL) break;
4573 test_address(s, flags, &exit_value);
4577 exim_exit(exit_value);
4580 /* Handle expansion checking. Either expand items on the command line, or read
4581 from stdin if there aren't any. If -Mset was specified, load the message so
4582 that its variables can be used, but restrict this facility to admin users.
4583 Otherwise, if -bem was used, read a message from stdin. */
4587 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4589 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4592 fprintf(stderr, "exim: permission denied\n");
4595 message_id = argv[msg_action_arg];
4596 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4597 if (!spool_open_datafile(message_id))
4598 printf ("Failed to load message datafile %s\n", message_id);
4599 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4600 printf ("Failed to load message %s\n", message_id);
4603 /* Read a test message from a file. We fudge it up to be on stdin, saving
4604 stdin itself for later reading of expansion strings. */
4606 else if (expansion_test_message != NULL)
4608 int save_stdin = dup(0);
4609 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4612 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4614 return EXIT_FAILURE;
4617 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4618 message_ended = END_NOTENDED;
4619 read_message_body(receive_msg(extract_recipients));
4620 message_linecount += body_linecount;
4621 (void)dup2(save_stdin, 0);
4622 (void)close(save_stdin);
4623 clearerr(stdin); /* Required by Darwin */
4626 /* Allow $recipients for this testing */
4628 enable_dollar_recipients = TRUE;
4630 /* Expand command line items */
4632 if (recipients_arg < argc)
4634 while (recipients_arg < argc)
4636 uschar *s = argv[recipients_arg++];
4637 uschar *ss = expand_string(s);
4638 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4639 else printf("%s\n", CS ss);
4647 char *(*fn_readline)(const char *) = NULL;
4648 void (*fn_addhist)(const char *) = NULL;
4651 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4657 uschar *source = get_stdinput(fn_readline, fn_addhist);
4658 if (source == NULL) break;
4659 ss = expand_string(source);
4661 printf ("Failed: %s\n", expand_string_message);
4662 else printf("%s\n", CS ss);
4666 if (dlhandle != NULL) dlclose(dlhandle);
4670 /* The data file will be open after -Mset */
4672 if (deliver_datafile >= 0)
4674 (void)close(deliver_datafile);
4675 deliver_datafile = -1;
4678 exim_exit(EXIT_SUCCESS);
4682 /* The active host name is normally the primary host name, but it can be varied
4683 for hosts that want to play several parts at once. We need to ensure that it is
4684 set for host checking, and for receiving messages. */
4686 smtp_active_hostname = primary_hostname;
4687 if (raw_active_hostname != NULL)
4689 uschar *nah = expand_string(raw_active_hostname);
4692 if (!expand_string_forcedfail)
4693 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4694 "(smtp_active_hostname): %s", raw_active_hostname,
4695 expand_string_message);
4697 else if (nah[0] != 0) smtp_active_hostname = nah;
4700 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4701 given IP address so that the blocking and relay configuration can be tested.
4702 Unless a sender_ident was set by -oMt, we discard it (the default is the
4703 caller's login name). An RFC 1413 call is made only if we are running in the
4704 test harness and an incoming interface and both ports are specified, because
4705 there is no TCP/IP call to find the ident for. */
4712 if (!sender_ident_set)
4714 sender_ident = NULL;
4715 if (running_in_test_harness && sender_host_port != 0 &&
4716 interface_address != NULL && interface_port != 0)
4717 verify_get_ident(1413);
4720 /* In case the given address is a non-canonical IPv6 address, canonicize
4721 it. The code works for both IPv4 and IPv6, as it happens. */
4723 size = host_aton(sender_host_address, x);
4724 sender_host_address = store_get(48); /* large enough for full IPv6 */
4725 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4727 /* Now set up for testing */
4729 host_build_sender_fullhost();
4733 sender_local = FALSE;
4734 sender_host_notsocket = TRUE;
4735 debug_file = stderr;
4736 debug_fd = fileno(debug_file);
4737 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4738 "**** but without any ident (RFC 1413) callback.\n"
4739 "**** This is not for real!\n\n",
4740 sender_host_address);
4742 if (verify_check_host(&hosts_connection_nolog) == OK)
4743 log_write_selector &= ~L_smtp_connection;
4744 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4746 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4747 because a log line has already been written for all its failure exists
4748 (usually "connection refused: <reason>") and writing another one is
4749 unnecessary clutter. */
4751 if (smtp_start_session())
4753 reset_point = store_get(0);
4756 store_reset(reset_point);
4757 if (smtp_setup_msg() <= 0) break;
4758 if (!receive_msg(FALSE)) break;
4762 exim_exit(EXIT_SUCCESS);
4766 /* Arrange for message reception if recipients or SMTP were specified;
4767 otherwise complain unless a version print (-bV) happened or this is a filter
4768 verification test. In the former case, show the configuration file name. */
4770 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4772 if (version_printed)
4774 printf("Configuration file is %s\n", config_main_filename);
4775 return EXIT_SUCCESS;
4778 if (filter_test == FTEST_NONE)
4779 exim_usage(called_as);
4783 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4784 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4785 that we are not called from inetd, because that is rejected above. The
4786 following configuration settings are forced here:
4788 (1) Synchronous delivery (-odi)
4789 (2) Errors to stderr (-oep == -oeq)
4790 (3) No parallel remote delivery
4791 (4) Unprivileged delivery
4793 We don't force overall queueing options because there are several of them;
4794 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4795 to override any SMTP queueing. */
4799 synchronous_delivery = TRUE;
4800 arg_error_handling = ERRORS_STDERR;
4801 remote_max_parallel = 1;
4802 deliver_drop_privilege = TRUE;
4804 queue_smtp_domains = NULL;
4808 /* Prepare to accept one or more new messages on the standard input. When a
4809 message has been read, its id is returned in message_id[]. If doing immediate
4810 delivery, we fork a delivery process for each received message, except for the
4811 last one, where we can save a process switch.
4813 It is only in non-smtp mode that error_handling is allowed to be changed from
4814 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4815 sendmail error modes other than -oem ever actually used? Later: yes.) */
4817 if (!smtp_input) error_handling = arg_error_handling;
4819 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4820 logging being sent down the socket and make an identd call to get the
4825 (void)fclose(stderr);
4826 exim_nullstd(); /* Re-open to /dev/null */
4827 verify_get_ident(IDENT_PORT);
4828 host_build_sender_fullhost();
4829 set_process_info("handling incoming connection from %s via inetd",
4833 /* If the sender host address has been set, build sender_fullhost if it hasn't
4834 already been done (which it will have been for inetd). This caters for the
4835 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4836 so that the test for IP options is skipped for -bs input. */
4838 if (sender_host_address != NULL && sender_fullhost == NULL)
4840 host_build_sender_fullhost();
4841 set_process_info("handling incoming connection from %s via -oMa",
4843 sender_host_notsocket = TRUE;
4846 /* Otherwise, set the sender host as unknown except for inetd calls. This
4847 prevents host checking in the case of -bs not from inetd and also for -bS. */
4849 else if (!is_inetd) sender_host_unknown = TRUE;
4851 /* If stdout does not exist, then dup stdin to stdout. This can happen
4852 if exim is started from inetd. In this case fd 0 will be set to the socket,
4853 but fd 1 will not be set. This also happens for passed SMTP channels. */
4855 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4857 /* Set up the incoming protocol name and the state of the program. Root is
4858 allowed to force received protocol via the -oMr option above. If we have come
4859 via inetd, the process info has already been set up. We don't set
4860 received_protocol here for smtp input, as it varies according to
4861 batch/HELO/EHLO/AUTH/TLS. */
4865 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4866 smtp_batched_input? "batched " : "",
4867 (sender_address!= NULL)? sender_address : originator_login);
4871 if (received_protocol == NULL)
4872 received_protocol = string_sprintf("local%s", called_as);
4873 set_process_info("accepting a local non-SMTP message from <%s>",
4877 /* Initialize the session_local_queue-only flag (this will be ignored if
4878 mua_wrapper is set) */
4881 session_local_queue_only = queue_only;
4883 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4884 the spool if so configured. On failure, we must not attempt to send an error
4885 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4886 error code is given.) */
4888 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4890 fprintf(stderr, "exim: insufficient disk space\n");
4891 return EXIT_FAILURE;
4894 /* If this is smtp input of any kind, real or batched, handle the start of the
4897 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4898 because a log line has already been written for all its failure exists
4899 (usually "connection refused: <reason>") and writing another one is
4900 unnecessary clutter. */
4906 if (verify_check_host(&hosts_connection_nolog) == OK)
4907 log_write_selector &= ~L_smtp_connection;
4908 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4909 if (!smtp_start_session())
4912 exim_exit(EXIT_SUCCESS);
4916 /* Otherwise, set up the input size limit here. */
4920 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4921 if (expand_string_message != NULL)
4923 if (thismessage_size_limit == -1)
4924 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4925 "message_size_limit: %s", expand_string_message);
4927 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4928 "message_size_limit: %s", expand_string_message);
4932 /* Loop for several messages when reading SMTP input. If we fork any child
4933 processes, we don't want to wait for them unless synchronous delivery is
4934 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4935 same as SIG_DFL, despite the fact that documentation often lists the default as
4936 "ignore". This is a confusing area. This is what I know:
4938 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4939 processes that complete simply to go away without ever becoming defunct. You
4940 can't then wait for them - but we don't want to wait for them in the
4941 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4942 happen for all OS (e.g. *BSD is different).
4944 But that's not the end of the story. Some (many? all?) systems have the
4945 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4946 has by default, so it seems that the difference is merely one of default
4947 (compare restarting vs non-restarting signals).
4949 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4950 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4951 of the loop below. Paranoia rules.
4953 February 2003: That's *still* not the end of the story. There are now versions
4954 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4955 process then calls waitpid(), a grumble is written to the system log, because
4956 this is logically inconsistent. In other words, it doesn't like the paranoia.
4957 As a consequenc of this, the waitpid() below is now excluded if we are sure
4958 that SIG_IGN works. */
4960 if (!synchronous_delivery)
4963 struct sigaction act;
4964 act.sa_handler = SIG_IGN;
4965 sigemptyset(&(act.sa_mask));
4966 act.sa_flags = SA_NOCLDWAIT;
4967 sigaction(SIGCHLD, &act, NULL);
4969 signal(SIGCHLD, SIG_IGN);
4973 /* Save the current store pool point, for resetting at the start of
4974 each message, and save the real sender address, if any. */
4976 reset_point = store_get(0);
4977 real_sender_address = sender_address;
4979 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4980 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4985 store_reset(reset_point);
4988 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4989 input and build the recipients list, before calling receive_msg() to read the
4990 message proper. Whatever sender address is given in the SMTP transaction is
4991 often ignored for local senders - we use the actual sender, which is normally
4992 either the underlying user running this process or a -f argument provided by
4993 a trusted caller. It is saved in real_sender_address. The test for whether to
4994 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4999 if ((rc = smtp_setup_msg()) > 0)
5001 if (real_sender_address != NULL &&
5002 !receive_check_set_sender(sender_address))
5004 sender_address = raw_sender = real_sender_address;
5005 sender_address_unrewritten = NULL;
5008 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5009 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5010 the very end. The result of the ACL is ignored (as for other non-SMTP
5011 messages). It is run for its potential side effects. */
5013 if (smtp_batched_input && acl_not_smtp_start != NULL)
5015 uschar *user_msg, *log_msg;
5016 enable_dollar_recipients = TRUE;
5017 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5018 &user_msg, &log_msg);
5019 enable_dollar_recipients = FALSE;
5022 /* Now get the data for the message */
5024 more = receive_msg(extract_recipients);
5025 if (message_id[0] == 0)
5028 smtp_log_no_mail(); /* Log no mail if configured */
5029 exim_exit(EXIT_FAILURE);
5034 smtp_log_no_mail(); /* Log no mail if configured */
5035 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5039 /* In the non-SMTP case, we have all the information from the command
5040 line, but must process it in case it is in the more general RFC822
5041 format, and in any case, to detect syntax errors. Also, it appears that
5042 the use of comma-separated lists as single arguments is common, so we
5043 had better support them. */
5049 int count = argc - recipients_arg;
5050 uschar **list = argv + recipients_arg;
5052 /* These options cannot be changed dynamically for non-SMTP messages */
5054 active_local_sender_retain = local_sender_retain;
5055 active_local_from_check = local_from_check;
5057 /* Save before any rewriting */
5059 raw_sender = string_copy(sender_address);
5061 /* Loop for each argument */
5063 for (i = 0; i < count; i++)
5065 int start, end, domain;
5067 uschar *s = list[i];
5069 /* Loop for each comma-separated address */
5073 BOOL finished = FALSE;
5075 uschar *ss = parse_find_address_end(s, FALSE);
5077 if (*ss == ',') *ss = 0; else finished = TRUE;
5079 /* Check max recipients - if -t was used, these aren't recipients */
5081 if (recipients_max > 0 && ++rcount > recipients_max &&
5082 !extract_recipients)
5084 if (error_handling == ERRORS_STDERR)
5086 fprintf(stderr, "exim: too many recipients\n");
5087 exim_exit(EXIT_FAILURE);
5092 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5093 errors_sender_rc : EXIT_FAILURE;
5098 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5100 if (domain == 0 && !allow_unqualified_recipient)
5103 errmess = US"unqualified recipient address not allowed";
5106 if (recipient == NULL)
5108 if (error_handling == ERRORS_STDERR)
5110 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5111 string_printing(list[i]), errmess);
5112 exim_exit(EXIT_FAILURE);
5118 eblock.text1 = string_printing(list[i]);
5119 eblock.text2 = errmess;
5121 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5122 errors_sender_rc : EXIT_FAILURE;
5126 receive_add_recipient(recipient, -1);
5129 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5133 /* Show the recipients when debugging */
5138 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5139 if (recipients_list != NULL)
5141 debug_printf("Recipients:\n");
5142 for (i = 0; i < recipients_count; i++)
5143 debug_printf(" %s\n", recipients_list[i].address);
5147 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5148 ignored; rejecting here would just add complication, and it can just as
5149 well be done later. Allow $recipients to be visible in the ACL. */
5151 if (acl_not_smtp_start != NULL)
5153 uschar *user_msg, *log_msg;
5154 enable_dollar_recipients = TRUE;
5155 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5156 &user_msg, &log_msg);
5157 enable_dollar_recipients = FALSE;
5160 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5161 will just read the headers for the message, and not write anything onto the
5164 message_ended = END_NOTENDED;
5165 more = receive_msg(extract_recipients);
5167 /* more is always FALSE here (not SMTP message) when reading a message
5168 for real; when reading the headers of a message for filter testing,
5169 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5171 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5172 } /* Non-SMTP message reception */
5174 /* If this is a filter testing run, there are headers in store, but
5175 no message on the spool. Run the filtering code in testing mode, setting
5176 the domain to the qualify domain and the local part to the current user,
5177 unless they have been set by options. The prefix and suffix are left unset
5178 unless specified. The the return path is set to to the sender unless it has
5179 already been set from a return-path header in the message. */
5181 if (filter_test != FTEST_NONE)
5183 deliver_domain = (ftest_domain != NULL)?
5184 ftest_domain : qualify_domain_recipient;
5185 deliver_domain_orig = deliver_domain;
5186 deliver_localpart = (ftest_localpart != NULL)?
5187 ftest_localpart : originator_login;
5188 deliver_localpart_orig = deliver_localpart;
5189 deliver_localpart_prefix = ftest_prefix;
5190 deliver_localpart_suffix = ftest_suffix;
5191 deliver_home = originator_home;
5193 if (return_path == NULL)
5195 printf("Return-path copied from sender\n");
5196 return_path = string_copy(sender_address);
5200 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5202 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5204 receive_add_recipient(
5205 string_sprintf("%s%s%s@%s",
5206 (ftest_prefix == NULL)? US"" : ftest_prefix,
5208 (ftest_suffix == NULL)? US"" : ftest_suffix,
5209 deliver_domain), -1);
5211 printf("Recipient = %s\n", recipients_list[0].address);
5212 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5213 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5215 (void)chdir("/"); /* Get away from wherever the user is running this from */
5217 /* Now we run either a system filter test, or a user filter test, or both.
5218 In the latter case, headers added by the system filter will persist and be
5219 available to the user filter. We need to copy the filter variables
5222 if ((filter_test & FTEST_SYSTEM) != 0)
5224 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5225 exim_exit(EXIT_FAILURE);
5228 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5230 if ((filter_test & FTEST_USER) != 0)
5232 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5233 exim_exit(EXIT_FAILURE);
5236 exim_exit(EXIT_SUCCESS);
5239 /* Else act on the result of message reception. We should not get here unless
5240 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5241 will be TRUE. If it is not, check on the number of messages received in this
5244 if (!session_local_queue_only &&
5245 smtp_accept_queue_per_connection > 0 &&
5246 receive_messagecount > smtp_accept_queue_per_connection)
5248 session_local_queue_only = TRUE;
5249 queue_only_reason = 2;
5252 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5253 and queue_only_load is set, check that the load average is below it. If it is
5254 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5255 default), we put the whole session into queue_only mode. It then remains this
5256 way for any subsequent messages on the same SMTP connection. This is a
5257 deliberate choice; even though the load average may fall, it doesn't seem
5258 right to deliver later messages on the same call when not delivering earlier
5259 ones. However, there are odd cases where this is not wanted, so this can be
5260 changed by setting queue_only_load_latch false. */
5262 local_queue_only = session_local_queue_only;
5263 if (!local_queue_only && queue_only_load >= 0)
5265 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5266 if (local_queue_only)
5268 queue_only_reason = 3;
5269 if (queue_only_load_latch) session_local_queue_only = TRUE;
5273 /* If running as an MUA wrapper, all queueing options and freezing options
5277 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5279 /* Log the queueing here, when it will get a message id attached, but
5280 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5283 if (local_queue_only) switch(queue_only_reason)
5286 log_write(L_delay_delivery,
5287 LOG_MAIN, "no immediate delivery: more than %d messages "
5288 "received in one connection", smtp_accept_queue_per_connection);
5292 log_write(L_delay_delivery,
5293 LOG_MAIN, "no immediate delivery: load average %.2f",
5294 (double)load_average/1000.0);
5298 /* Else do the delivery unless the ACL or local_scan() called for queue only
5299 or froze the message. Always deliver in a separate process. A fork failure is
5300 not a disaster, as the delivery will eventually happen on a subsequent queue
5301 run. The search cache must be tidied before the fork, as the parent will
5302 do it before exiting. The child will trigger a lookup failure and
5303 thereby defer the delivery if it tries to use (for example) a cached ldap
5304 connection that the parent has called unbind on. */
5306 else if (!queue_only_policy && !deliver_freeze)
5311 if ((pid = fork()) == 0)
5314 close_unwanted(); /* Close unwanted file descriptors and TLS */
5315 exim_nullstd(); /* Ensure std{in,out,err} exist */
5317 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5318 mode, deliver_drop_privilege is forced TRUE). */
5320 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5322 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5324 /* Control does not return here. */
5327 /* No need to re-exec */
5329 rc = deliver_message(message_id, FALSE, FALSE);
5331 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5332 EXIT_SUCCESS : EXIT_FAILURE);
5337 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5338 "process: %s", strerror(errno));
5341 /* In the parent, wait if synchronous delivery is required. This will
5342 always be the case in MUA wrapper mode. */
5344 else if (synchronous_delivery)
5347 while (wait(&status) != pid);
5348 if ((status & 0x00ff) != 0)
5349 log_write(0, LOG_MAIN|LOG_PANIC,
5350 "process %d crashed with signal %d while delivering %s",
5351 (int)pid, status & 0x00ff, message_id);
5352 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5356 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5357 automatically reaps children (see comments above the loop), clear away any
5358 finished subprocesses here, in case there are lots of messages coming in
5359 from the same source. */
5361 #ifndef SIG_IGN_WORKS
5362 while (waitpid(-1, NULL, WNOHANG) > 0);
5366 exim_exit(EXIT_SUCCESS); /* Never returns */
5367 return 0; /* To stop compiler warning */