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);
2067 /* -C: change configuration file list; ignore if it isn't really
2068 a change! Enforce a prefix check if required. */
2073 if(++i < argc) argrest = argv[i]; else
2074 { badarg = TRUE; break; }
2076 if (Ustrcmp(config_main_filelist, argrest) != 0)
2078 #ifdef ALT_CONFIG_PREFIX
2080 int len = Ustrlen(ALT_CONFIG_PREFIX);
2081 uschar *list = argrest;
2083 while((filename = string_nextinlist(&list, &sep, big_buffer,
2084 big_buffer_size)) != NULL)
2086 if ((Ustrlen(filename) < len ||
2087 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2088 Ustrstr(filename, "/../") != NULL) &&
2089 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2091 fprintf(stderr, "-C Permission denied\n");
2096 if (real_uid != root_uid)
2098 #ifdef TRUSTED_CONFIG_LIST
2100 if (real_uid != exim_uid
2101 #ifdef CONFIGURE_OWNER
2102 && real_uid != config_uid
2105 trusted_config = FALSE;
2108 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2111 struct stat statbuf;
2113 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2114 (statbuf.st_uid != root_uid /* owner not root */
2115 #ifdef CONFIGURE_OWNER
2116 && statbuf.st_uid != config_uid /* owner not the special one */
2119 (statbuf.st_gid != root_gid /* group not root */
2120 #ifdef CONFIGURE_GROUP
2121 && statbuf.st_gid != config_gid /* group not the special one */
2123 && (statbuf.st_mode & 020) != 0 /* group writeable */
2125 (statbuf.st_mode & 2) != 0) /* world writeable */
2127 trusted_config = FALSE;
2132 /* Well, the trust list at least is up to scratch... */
2133 void *reset_point = store_get(0);
2134 uschar *trusted_configs[32];
2138 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2140 uschar *start = big_buffer, *nl;
2141 while (*start && isspace(*start))
2145 nl = Ustrchr(start, '\n');
2148 trusted_configs[nr_configs++] = string_copy(start);
2149 if (nr_configs == 32)
2157 uschar *list = argrest;
2159 while (trusted_config && (filename = string_nextinlist(&list,
2160 &sep, big_buffer, big_buffer_size)) != NULL)
2162 for (i=0; i < nr_configs; i++)
2164 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2167 if (i == nr_configs)
2169 trusted_config = FALSE;
2173 store_reset(reset_point);
2177 /* No valid prefixes found in trust_list file. */
2178 trusted_config = FALSE;
2184 /* Could not open trust_list file. */
2185 trusted_config = FALSE;
2189 /* Not root; don't trust config */
2190 trusted_config = FALSE;
2194 config_main_filelist = argrest;
2195 config_changed = TRUE;
2200 /* -D: set up a macro definition */
2203 #ifdef DISABLE_D_OPTION
2204 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2209 macro_item *mlast = NULL;
2212 uschar *s = argrest;
2214 while (isspace(*s)) s++;
2216 if (*s < 'A' || *s > 'Z')
2218 fprintf(stderr, "exim: macro name set by -D must start with "
2219 "an upper case letter\n");
2223 while (isalnum(*s) || *s == '_')
2225 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2229 if (ptr == 0) { badarg = TRUE; break; }
2230 while (isspace(*s)) s++;
2233 if (*s++ != '=') { badarg = TRUE; break; }
2234 while (isspace(*s)) s++;
2237 for (m = macros; m != NULL; m = m->next)
2239 if (Ustrcmp(m->name, name) == 0)
2241 fprintf(stderr, "exim: duplicated -D in command line\n");
2247 m = store_get(sizeof(macro_item) + Ustrlen(name));
2249 m->command_line = TRUE;
2250 if (mlast == NULL) macros = m; else mlast->next = m;
2251 Ustrcpy(m->name, name);
2252 m->replacement = string_copy(s);
2254 if (clmacro_count >= MAX_CLMACROS)
2256 fprintf(stderr, "exim: too many -D options on command line\n");
2259 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2265 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2266 The latter is now a no-op, retained for compatibility only. If -dd is used,
2267 debugging subprocesses of the daemon is disabled. */
2270 if (Ustrcmp(argrest, "ropcr") == 0)
2272 /* drop_cr = TRUE; */
2275 /* Use an intermediate variable so that we don't set debugging while
2276 decoding the debugging bits. */
2280 unsigned int selector = D_default;
2283 if (*argrest == 'd')
2285 debug_daemon = TRUE;
2289 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2290 debug_options_count, US"debug", 0);
2291 debug_selector = selector;
2296 /* -E: This is a local error message. This option is not intended for
2297 external use at all, but is not restricted to trusted callers because it
2298 does no harm (just suppresses certain error messages) and if Exim is run
2299 not setuid root it won't always be trusted when it generates error
2300 messages using this option. If there is a message id following -E, point
2301 message_reference at it, for logging. */
2304 local_error_message = TRUE;
2305 if (mac_ismsgid(argrest)) message_reference = argrest;
2309 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2310 option, so it looks as if historically the -oex options are also callable
2311 without the leading -o. So we have to accept them. Before the switch,
2312 anything starting -oe has been converted to -e. Exim does not support all
2313 of the sendmail error options. */
2316 if (Ustrcmp(argrest, "e") == 0)
2318 arg_error_handling = ERRORS_SENDER;
2319 errors_sender_rc = EXIT_SUCCESS;
2321 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2322 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2323 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2324 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2329 /* -F: Set sender's full name, used instead of the gecos entry from
2330 the password file. Since users can usually alter their gecos entries,
2331 there's no security involved in using this instead. The data can follow
2332 the -F or be in the next argument. */
2337 if(++i < argc) argrest = argv[i]; else
2338 { badarg = TRUE; break; }
2340 originator_name = argrest;
2341 sender_name_forced = TRUE;
2345 /* -f: Set sender's address - this value is only actually used if Exim is
2346 run by a trusted user, or if untrusted_set_sender is set and matches the
2347 address, except that the null address can always be set by any user. The
2348 test for this happens later, when the value given here is ignored when not
2349 permitted. For an untrusted user, the actual sender is still put in Sender:
2350 if it doesn't match the From: header (unless no_local_from_check is set).
2351 The data can follow the -f or be in the next argument. The -r switch is an
2352 obsolete form of -f but since there appear to be programs out there that
2353 use anything that sendmail has ever supported, better accept it - the
2354 synonymizing is done before the switch above.
2356 At this stage, we must allow domain literal addresses, because we don't
2357 know what the setting of allow_domain_literals is yet. Ditto for trailing
2358 dots and strip_trailing_dot. */
2366 if (i+1 < argc) argrest = argv[++i]; else
2367 { badarg = TRUE; break; }
2371 sender_address = string_sprintf(""); /* Ensure writeable memory */
2375 uschar *temp = argrest + Ustrlen(argrest) - 1;
2376 while (temp >= argrest && isspace(*temp)) temp--;
2377 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2378 allow_domain_literals = TRUE;
2379 strip_trailing_dot = TRUE;
2380 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2381 &sender_address_domain, TRUE);
2382 allow_domain_literals = FALSE;
2383 strip_trailing_dot = FALSE;
2384 if (sender_address == NULL)
2386 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2387 return EXIT_FAILURE;
2390 sender_address_forced = TRUE;
2394 /* This is some Sendmail thing which can be ignored */
2399 /* -h: Set the hop count for an incoming message. Exim does not currently
2400 support this; it always computes it by counting the Received: headers.
2401 To put it in will require a change to the spool header file format. */
2406 if(++i < argc) argrest = argv[i]; else
2407 { badarg = TRUE; break; }
2409 if (!isdigit(*argrest)) badarg = TRUE;
2413 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2414 not to be documented for sendmail but mailx (at least) uses it) */
2417 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2422 receiving_message = FALSE;
2424 /* -MC: continue delivery of another message via an existing open
2425 file descriptor. This option is used for an internal call by the
2426 smtp transport when there is a pending message waiting to go to an
2427 address to which it has got a connection. Five subsequent arguments are
2428 required: transport name, host name, IP address, sequence number, and
2429 message_id. Transports may decline to create new processes if the sequence
2430 number gets too big. The channel is stdin. This (-MC) must be the last
2431 argument. There's a subsequent check that the real-uid is privileged.
2433 If we are running in the test harness. delay for a bit, to let the process
2434 that set this one up complete. This makes for repeatability of the logging,
2437 if (Ustrcmp(argrest, "C") == 0)
2439 union sockaddr_46 interface_sock;
2440 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2444 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2445 return EXIT_FAILURE;
2448 if (msg_action_arg >= 0)
2450 fprintf(stderr, "exim: incompatible arguments\n");
2451 return EXIT_FAILURE;
2454 continue_transport = argv[++i];
2455 continue_hostname = argv[++i];
2456 continue_host_address = argv[++i];
2457 continue_sequence = Uatoi(argv[++i]);
2458 msg_action = MSG_DELIVER;
2459 msg_action_arg = ++i;
2460 forced_delivery = TRUE;
2461 queue_run_pid = passed_qr_pid;
2462 queue_run_pipe = passed_qr_pipe;
2464 if (!mac_ismsgid(argv[i]))
2466 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2468 return EXIT_FAILURE;
2471 /* Set up $sending_ip_address and $sending_port */
2473 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2475 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2479 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2481 return EXIT_FAILURE;
2484 if (running_in_test_harness) millisleep(500);
2488 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2489 precedes -MC (see above). The flag indicates that the host to which
2490 Exim is connected has accepted an AUTH sequence. */
2492 else if (Ustrcmp(argrest, "CA") == 0)
2494 smtp_authenticated = TRUE;
2498 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2499 it preceded -MC (see above) */
2501 else if (Ustrcmp(argrest, "CP") == 0)
2503 smtp_use_pipelining = TRUE;
2507 /* -MCQ: pass on the pid of the queue-running process that started
2508 this chain of deliveries and the fd of its synchronizing pipe; this
2509 is useful only when it precedes -MC (see above) */
2511 else if (Ustrcmp(argrest, "CQ") == 0)
2513 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2515 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2520 /* -MCS: set the smtp_use_size flag; this is useful only when it
2521 precedes -MC (see above) */
2523 else if (Ustrcmp(argrest, "CS") == 0)
2525 smtp_use_size = TRUE;
2529 /* -MCT: set the tls_offered flag; this is useful only when it
2530 precedes -MC (see above). The flag indicates that the host to which
2531 Exim is connected has offered TLS support. */
2534 else if (Ustrcmp(argrest, "CT") == 0)
2541 /* -M[x]: various operations on the following list of message ids:
2542 -M deliver the messages, ignoring next retry times and thawing
2543 -Mc deliver the messages, checking next retry times, no thawing
2544 -Mf freeze the messages
2545 -Mg give up on the messages
2546 -Mt thaw the messages
2547 -Mrm remove the messages
2548 In the above cases, this must be the last option. There are also the
2549 following options which are followed by a single message id, and which
2550 act on that message. Some of them use the "recipient" addresses as well.
2551 -Mar add recipient(s)
2552 -Mmad mark all recipients delivered
2553 -Mmd mark recipients(s) delivered
2555 -Mset load a message for use with -be
2557 -Mvc show copy (of whole message, in RFC 2822 format)
2562 else if (*argrest == 0)
2564 msg_action = MSG_DELIVER;
2565 forced_delivery = deliver_force_thaw = TRUE;
2567 else if (Ustrcmp(argrest, "ar") == 0)
2569 msg_action = MSG_ADD_RECIPIENT;
2570 one_msg_action = TRUE;
2572 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2573 else if (Ustrcmp(argrest, "es") == 0)
2575 msg_action = MSG_EDIT_SENDER;
2576 one_msg_action = TRUE;
2578 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2579 else if (Ustrcmp(argrest, "g") == 0)
2581 msg_action = MSG_DELIVER;
2582 deliver_give_up = TRUE;
2584 else if (Ustrcmp(argrest, "mad") == 0)
2586 msg_action = MSG_MARK_ALL_DELIVERED;
2588 else if (Ustrcmp(argrest, "md") == 0)
2590 msg_action = MSG_MARK_DELIVERED;
2591 one_msg_action = TRUE;
2593 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2594 else if (Ustrcmp(argrest, "set") == 0)
2596 msg_action = MSG_LOAD;
2597 one_msg_action = TRUE;
2599 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2600 else if (Ustrcmp(argrest, "vb") == 0)
2602 msg_action = MSG_SHOW_BODY;
2603 one_msg_action = TRUE;
2605 else if (Ustrcmp(argrest, "vc") == 0)
2607 msg_action = MSG_SHOW_COPY;
2608 one_msg_action = TRUE;
2610 else if (Ustrcmp(argrest, "vh") == 0)
2612 msg_action = MSG_SHOW_HEADER;
2613 one_msg_action = TRUE;
2615 else if (Ustrcmp(argrest, "vl") == 0)
2617 msg_action = MSG_SHOW_LOG;
2618 one_msg_action = TRUE;
2620 else { badarg = TRUE; break; }
2622 /* All the -Mxx options require at least one message id. */
2624 msg_action_arg = i + 1;
2625 if (msg_action_arg >= argc)
2627 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2628 return EXIT_FAILURE;
2631 /* Some require only message ids to follow */
2633 if (!one_msg_action)
2636 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2638 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2640 return EXIT_FAILURE;
2642 goto END_ARG; /* Remaining args are ids */
2645 /* Others require only one message id, possibly followed by addresses,
2646 which will be handled as normal arguments. */
2650 if (!mac_ismsgid(argv[msg_action_arg]))
2652 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2653 argv[msg_action_arg], arg);
2654 return EXIT_FAILURE;
2661 /* Some programs seem to call the -om option without the leading o;
2662 for sendmail it askes for "me too". Exim always does this. */
2665 if (*argrest != 0) badarg = TRUE;
2669 /* -N: don't do delivery - a debugging option that stops transports doing
2670 their thing. It implies debugging at the D_v level. */
2675 dont_deliver = TRUE;
2676 debug_selector |= D_v;
2677 debug_file = stderr;
2683 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2689 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2690 option to the specified value. This form uses long names. We need to handle
2691 -O option=value and -Ooption=value. */
2698 fprintf(stderr, "exim: string expected after -O\n");
2706 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2709 if (*argrest == 'A')
2711 alias_arg = argrest + 1;
2712 if (alias_arg[0] == 0)
2714 if (i+1 < argc) alias_arg = argv[++i]; else
2716 fprintf(stderr, "exim: string expected after -oA\n");
2722 /* -oB: Set a connection message max value for remote deliveries */
2724 else if (*argrest == 'B')
2726 uschar *p = argrest + 1;
2729 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2731 connection_max_messages = 1;
2740 fprintf(stderr, "exim: number expected after -oB\n");
2743 connection_max_messages = Uatoi(p);
2747 /* -odb: background delivery */
2749 else if (Ustrcmp(argrest, "db") == 0)
2751 synchronous_delivery = FALSE;
2752 arg_queue_only = FALSE;
2753 queue_only_set = TRUE;
2756 /* -odf: foreground delivery (smail-compatible option); same effect as
2757 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2760 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2762 synchronous_delivery = TRUE;
2763 arg_queue_only = FALSE;
2764 queue_only_set = TRUE;
2767 /* -odq: queue only */
2769 else if (Ustrcmp(argrest, "dq") == 0)
2771 synchronous_delivery = FALSE;
2772 arg_queue_only = TRUE;
2773 queue_only_set = TRUE;
2776 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2777 but no remote delivery */
2779 else if (Ustrcmp(argrest, "dqs") == 0)
2782 arg_queue_only = FALSE;
2783 queue_only_set = TRUE;
2786 /* -oex: Sendmail error flags. As these are also accepted without the
2787 leading -o prefix, for compatibility with vacation and other callers,
2788 they are handled with -e above. */
2790 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2791 -oitrue: Another sendmail syntax for the same */
2793 else if (Ustrcmp(argrest, "i") == 0 ||
2794 Ustrcmp(argrest, "itrue") == 0)
2797 /* -oM*: Set various characteristics for an incoming message; actually
2798 acted on for trusted callers only. */
2800 else if (*argrest == 'M')
2804 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2808 /* -oMa: Set sender host address */
2810 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2812 /* -oMaa: Set authenticator name */
2814 else if (Ustrcmp(argrest, "Maa") == 0)
2815 sender_host_authenticated = argv[++i];
2817 /* -oMas: setting authenticated sender */
2819 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2821 /* -oMai: setting authenticated id */
2823 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2825 /* -oMi: Set incoming interface address */
2827 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2829 /* -oMr: Received protocol */
2831 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2833 /* -oMs: Set sender host name */
2835 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2837 /* -oMt: Set sender ident */
2839 else if (Ustrcmp(argrest, "Mt") == 0)
2841 sender_ident_set = TRUE;
2842 sender_ident = argv[++i];
2845 /* Else a bad argument */
2854 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2855 seem to call this as -m (undocumented), so that is also accepted (see
2858 else if (Ustrcmp(argrest, "m") == 0) {}
2860 /* -oo: An ancient flag for old-style addresses which still seems to
2861 crop up in some calls (see in SCO). */
2863 else if (Ustrcmp(argrest, "o") == 0) {}
2865 /* -oP <name>: set pid file path for daemon */
2867 else if (Ustrcmp(argrest, "P") == 0)
2868 override_pid_file_path = argv[++i];
2870 /* -or <n>: set timeout for non-SMTP acceptance
2871 -os <n>: set timeout for SMTP acceptance */
2873 else if (*argrest == 'r' || *argrest == 's')
2875 int *tp = (*argrest == 'r')?
2876 &arg_receive_timeout : &arg_smtp_receive_timeout;
2877 if (argrest[1] == 0)
2879 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2881 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2884 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2889 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2891 else if (Ustrcmp(argrest, "X") == 0)
2892 override_local_interfaces = argv[++i];
2894 /* Unknown -o argument */
2900 /* -ps: force Perl startup; -pd force delayed Perl startup */
2904 if (*argrest == 's' && argrest[1] == 0)
2906 perl_start_option = 1;
2909 if (*argrest == 'd' && argrest[1] == 0)
2911 perl_start_option = -1;
2916 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2917 which sets the host protocol and host name */
2921 if (i+1 < argc) argrest = argv[++i]; else
2922 { badarg = TRUE; break; }
2927 uschar *hn = Ustrchr(argrest, ':');
2930 received_protocol = argrest;
2934 received_protocol = string_copyn(argrest, hn - argrest);
2935 sender_host_name = hn + 1;
2942 receiving_message = FALSE;
2943 if (queue_interval >= 0)
2945 fprintf(stderr, "exim: -q specified more than once\n");
2949 /* -qq...: Do queue runs in a 2-stage manner */
2951 if (*argrest == 'q')
2953 queue_2stage = TRUE;
2957 /* -qi...: Do only first (initial) deliveries */
2959 if (*argrest == 'i')
2961 queue_run_first_delivery = TRUE;
2965 /* -qf...: Run the queue, forcing deliveries
2966 -qff..: Ditto, forcing thawing as well */
2968 if (*argrest == 'f')
2970 queue_run_force = TRUE;
2971 if (*(++argrest) == 'f')
2973 deliver_force_thaw = TRUE;
2978 /* -q[f][f]l...: Run the queue only on local deliveries */
2980 if (*argrest == 'l')
2982 queue_run_local = TRUE;
2986 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2987 optionally starting from a given message id. */
2989 if (*argrest == 0 &&
2990 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2993 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2994 start_queue_run_id = argv[++i];
2995 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2996 stop_queue_run_id = argv[++i];
2999 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3000 optionally local only. */
3005 queue_interval = readconf_readtime(argrest, 0, FALSE);
3007 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3008 if (queue_interval <= 0)
3010 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3017 case 'R': /* Synonymous with -qR... */
3018 receiving_message = FALSE;
3020 /* -Rf: As -R (below) but force all deliveries,
3021 -Rff: Ditto, but also thaw all frozen messages,
3022 -Rr: String is regex
3023 -Rrf: Regex and force
3024 -Rrff: Regex and force and thaw
3026 in all cases provided there are no further characters in this
3032 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3034 if (Ustrcmp(argrest, rsopts[i]) == 0)
3036 if (i != 2) queue_run_force = TRUE;
3037 if (i >= 2) deliver_selectstring_regex = TRUE;
3038 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3039 argrest += Ustrlen(rsopts[i]);
3044 /* -R: Set string to match in addresses for forced queue run to
3045 pick out particular messages. */
3049 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3051 fprintf(stderr, "exim: string expected after -R\n");
3055 else deliver_selectstring = argrest;
3059 /* -r: an obsolete synonym for -f (see above) */
3062 /* -S: Like -R but works on sender. */
3064 case 'S': /* Synonymous with -qS... */
3065 receiving_message = FALSE;
3067 /* -Sf: As -S (below) but force all deliveries,
3068 -Sff: Ditto, but also thaw all frozen messages,
3069 -Sr: String is regex
3070 -Srf: Regex and force
3071 -Srff: Regex and force and thaw
3073 in all cases provided there are no further characters in this
3079 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3081 if (Ustrcmp(argrest, rsopts[i]) == 0)
3083 if (i != 2) queue_run_force = TRUE;
3084 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3085 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3086 argrest += Ustrlen(rsopts[i]);
3091 /* -S: Set string to match in addresses for forced queue run to
3092 pick out particular messages. */
3096 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3098 fprintf(stderr, "exim: string expected after -S\n");
3102 else deliver_selectstring_sender = argrest;
3105 /* -Tqt is an option that is exclusively for use by the testing suite.
3106 It is not recognized in other circumstances. It allows for the setting up
3107 of explicit "queue times" so that various warning/retry things can be
3108 tested. Otherwise variability of clock ticks etc. cause problems. */
3111 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3112 fudged_queue_times = argv[++i];
3117 /* -t: Set flag to extract recipients from body of message. */
3120 if (*argrest == 0) extract_recipients = TRUE;
3122 /* -ti: Set flag to extract recipients from body of message, and also
3123 specify that dot does not end the message. */
3125 else if (Ustrcmp(argrest, "i") == 0)
3127 extract_recipients = TRUE;
3131 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3134 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3141 /* -U: This means "initial user submission" in sendmail, apparently. The
3142 doc claims that in future sendmail may refuse syntactically invalid
3143 messages instead of fixing them. For the moment, we just ignore it. */
3149 /* -v: verify things - this is a very low-level debugging */
3154 debug_selector |= D_v;
3155 debug_file = stderr;
3161 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3163 The -x flag tells the sendmail command that mail from a local
3164 mail program has National Language Support (NLS) extended characters
3165 in the body of the mail item. The sendmail command can send mail with
3166 extended NLS characters across networks that normally corrupts these
3169 As Exim is 8-bit clean, it just ignores this flag. */
3172 if (*argrest != 0) badarg = TRUE;
3175 /* All other initial characters are errors */
3180 } /* End of high-level switch statement */
3182 /* Failed to recognize the option, or syntax error */
3186 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3187 "option %s\n", arg);
3193 /* If -R or -S have been specified without -q, assume a single queue run. */
3195 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3196 queue_interval < 0) queue_interval = 0;
3200 /* If usage_wanted is set we call the usage function - which never returns */
3201 if (usage_wanted) exim_usage(called_as);
3203 /* Arguments have been processed. Check for incompatibilities. */
3205 (smtp_input || extract_recipients || recipients_arg < argc) &&
3206 (daemon_listen || queue_interval >= 0 || bi_option ||
3207 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3208 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3211 msg_action_arg > 0 &&
3212 (daemon_listen || queue_interval >= 0 || list_options ||
3213 (checking && msg_action != MSG_LOAD) ||
3214 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3217 (daemon_listen || queue_interval >= 0) &&
3218 (sender_address != NULL || list_options || list_queue || checking ||
3222 daemon_listen && queue_interval == 0
3226 (checking || smtp_input || extract_recipients ||
3227 filter_test != FTEST_NONE || bi_option)
3230 verify_address_mode &&
3231 (address_test_mode || smtp_input || extract_recipients ||
3232 filter_test != FTEST_NONE || bi_option)
3235 address_test_mode && (smtp_input || extract_recipients ||
3236 filter_test != FTEST_NONE || bi_option)
3239 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3243 deliver_selectstring != NULL && queue_interval < 0
3246 msg_action == MSG_LOAD &&
3247 (!expansion_test || expansion_test_message != NULL)
3251 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3255 /* If debugging is set up, set the file and the file descriptor to pass on to
3256 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3257 to run in the foreground. */
3259 if (debug_selector != 0)
3261 debug_file = stderr;
3262 debug_fd = fileno(debug_file);
3263 background_daemon = FALSE;
3264 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3265 if (debug_selector != D_v) /* -v only doesn't show this */
3267 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3268 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3270 if (!version_printed)
3271 show_whats_supported(stderr);
3275 /* When started with root privilege, ensure that the limits on the number of
3276 open files and the number of processes (where that is accessible) are
3277 sufficiently large, or are unset, in case Exim has been called from an
3278 environment where the limits are screwed down. Not all OS have the ability to
3279 change some of these limits. */
3283 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3289 #ifdef RLIMIT_NOFILE
3290 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3292 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3294 rlp.rlim_cur = rlp.rlim_max = 0;
3297 /* I originally chose 1000 as a nice big number that was unlikely to
3298 be exceeded. It turns out that some older OS have a fixed upper limit of
3301 if (rlp.rlim_cur < 1000)
3303 rlp.rlim_cur = rlp.rlim_max = 1000;
3304 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3306 rlp.rlim_cur = rlp.rlim_max = 256;
3307 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3308 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3315 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3317 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3319 rlp.rlim_cur = rlp.rlim_max = 0;
3322 #ifdef RLIM_INFINITY
3323 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3325 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3327 if (rlp.rlim_cur < 1000)
3329 rlp.rlim_cur = rlp.rlim_max = 1000;
3331 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3332 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3338 /* Exim is normally entered as root (but some special configurations are
3339 possible that don't do this). However, it always spins off sub-processes that
3340 set their uid and gid as required for local delivery. We don't want to pass on
3341 any extra groups that root may belong to, so we want to get rid of them all at
3344 We need to obey setgroups() at this stage, before possibly giving up root
3345 privilege for a changed configuration file, but later on we might need to
3346 check on the additional groups for the admin user privilege - can't do that
3347 till after reading the config, which might specify the exim gid. Therefore,
3348 save the group list here first. */
3350 group_count = getgroups(NGROUPS_MAX, group_list);
3351 if (group_count < 0)
3353 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3357 /* There is a fundamental difference in some BSD systems in the matter of
3358 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3359 known not to be different. On the "different" systems there is a single group
3360 list, and the first entry in it is the current group. On all other versions of
3361 Unix there is a supplementary group list, which is in *addition* to the current
3362 group. Consequently, to get rid of all extraneous groups on a "standard" system
3363 you pass over 0 groups to setgroups(), while on a "different" system you pass
3364 over a single group - the current group, which is always the first group in the
3365 list. Calling setgroups() with zero groups on a "different" system results in
3366 an error return. The following code should cope with both types of system.
3368 However, if this process isn't running as root, setgroups() can't be used
3369 since you have to be root to run it, even if throwing away groups. Not being
3370 root here happens only in some unusual configurations. We just ignore the
3373 if (setgroups(0, NULL) != 0)
3375 if (setgroups(1, group_list) != 0 && !unprivileged)
3377 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3382 /* If the configuration file name has been altered by an argument on the
3383 command line (either a new file name or a macro definition) and the caller is
3384 not root, or if this is a filter testing run, remove any setuid privilege the
3385 program has and run as the underlying user.
3387 The exim user is locked out of this, which severely restricts the use of -C
3390 Otherwise, set the real ids to the effective values (should be root unless run
3391 from inetd, which it can either be root or the exim uid, if one is configured).
3393 There is a private mechanism for bypassing some of this, in order to make it
3394 possible to test lots of configurations automatically, without having either to
3395 recompile each time, or to patch in an actual configuration file name and other
3396 values (such as the path name). If running in the test harness, pretend that
3397 configuration file changes and macro definitions haven't happened. */
3400 (!trusted_config || /* Config changed, or */
3401 !macros_trusted()) && /* impermissible macros and */
3402 real_uid != root_uid && /* Not root, and */
3403 !running_in_test_harness /* Not fudged */
3405 expansion_test /* expansion testing */
3407 filter_test != FTEST_NONE) /* Filter testing */
3409 setgroups(group_count, group_list);
3410 exim_setugid(real_uid, real_gid, FALSE,
3411 US"-C, -D, -be or -bf forces real uid");
3412 removed_privilege = TRUE;
3414 /* In the normal case when Exim is called like this, stderr is available
3415 and should be used for any logging information because attempts to write
3416 to the log will usually fail. To arrange this, we unset really_exim. However,
3417 if no stderr is available there is no point - we might as well have a go
3418 at the log (if it fails, syslog will be written).
3420 Note that if the invoker is Exim, the logs remain available. Messing with
3421 this causes unlogged successful deliveries. */
3423 if ((log_stderr != NULL) && (real_uid != exim_uid))
3424 really_exim = FALSE;
3427 /* Privilege is to be retained for the moment. It may be dropped later,
3428 depending on the job that this Exim process has been asked to do. For now, set
3429 the real uid to the effective so that subsequent re-execs of Exim are done by a
3432 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3434 /* If testing a filter, open the file(s) now, before wasting time doing other
3435 setups and reading the message. */
3437 if ((filter_test & FTEST_SYSTEM) != 0)
3439 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3442 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3444 return EXIT_FAILURE;
3448 if ((filter_test & FTEST_USER) != 0)
3450 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3453 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3455 return EXIT_FAILURE;
3459 /* Initialise lookup_list
3460 If debugging, already called above via version reporting.
3461 In either case, we initialise the list of available lookups while running
3462 as root. All dynamically modules are loaded from a directory which is
3463 hard-coded into the binary and is code which, if not a module, would be
3464 part of Exim already. Ability to modify the content of the directory
3465 is equivalent to the ability to modify a setuid binary!
3467 This needs to happen before we read the main configuration. */
3470 /* Read the main runtime configuration data; this gives up if there
3471 is a failure. It leaves the configuration file open so that the subsequent
3472 configuration data for delivery can be read if needed. */
3476 /* Handle the decoding of logging options. */
3478 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3479 log_selector_string, log_options, log_options_count, US"log", 0);
3483 debug_printf("configuration file is %s\n", config_main_filename);
3484 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3485 log_extra_selector);
3488 /* If domain literals are not allowed, check the sender address that was
3489 supplied with -f. Ditto for a stripped trailing dot. */
3491 if (sender_address != NULL)
3493 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3495 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3496 "allowed\n", sender_address);
3497 return EXIT_FAILURE;
3499 if (f_end_dot && !strip_trailing_dot)
3501 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3502 "(trailing dot not allowed)\n", sender_address);
3503 return EXIT_FAILURE;
3507 /* Paranoia check of maximum lengths of certain strings. There is a check
3508 on the length of the log file path in log.c, which will come into effect
3509 if there are any calls to write the log earlier than this. However, if we
3510 get this far but the string is very long, it is better to stop now than to
3511 carry on and (e.g.) receive a message and then have to collapse. The call to
3512 log_write() from here will cause the ultimate panic collapse if the complete
3513 file name exceeds the buffer length. */
3515 if (Ustrlen(log_file_path) > 200)
3516 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3517 "log_file_path is longer than 200 chars: aborting");
3519 if (Ustrlen(pid_file_path) > 200)
3520 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3521 "pid_file_path is longer than 200 chars: aborting");
3523 if (Ustrlen(spool_directory) > 200)
3524 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3525 "spool_directory is longer than 200 chars: aborting");
3527 /* Length check on the process name given to syslog for its TAG field,
3528 which is only permitted to be 32 characters or less. See RFC 3164. */
3530 if (Ustrlen(syslog_processname) > 32)
3531 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3532 "syslog_processname is longer than 32 chars: aborting");
3534 /* In some operating systems, the environment variable TMPDIR controls where
3535 temporary files are created; Exim doesn't use these (apart from when delivering
3536 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3537 If TMPDIR is found in the environment, reset it to the value defined in the
3538 TMPDIR macro, if this macro is defined. */
3543 for (p = USS environ; *p != NULL; p++)
3545 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3546 Ustrcmp(*p+7, TMPDIR) != 0)
3548 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3549 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3551 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3557 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3558 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3559 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3560 called by a user who has set the TZ variable. This then affects the timestamps
3561 in log files and in Received: headers, and any created Date: header lines. The
3562 required timezone is settable in the configuration file, so nothing can be done
3563 about this earlier - but hopefully nothing will normally be logged earlier than
3564 this. We have to make a new environment if TZ is wrong, but don't bother if
3565 timestamps_utc is set, because then all times are in UTC anyway. */
3567 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3569 timestamps_utc = TRUE;
3573 uschar *envtz = US getenv("TZ");
3574 if ((envtz == NULL && timezone_string != NULL) ||
3576 (timezone_string == NULL ||
3577 Ustrcmp(timezone_string, envtz) != 0)))
3579 uschar **p = USS environ;
3583 while (*p++ != NULL) count++;
3584 if (envtz == NULL) count++;
3585 newp = new = malloc(sizeof(uschar *) * (count + 1));
3586 for (p = USS environ; *p != NULL; p++)
3588 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3591 if (timezone_string != NULL)
3593 *newp = malloc(Ustrlen(timezone_string) + 4);
3594 sprintf(CS *newp++, "TZ=%s", timezone_string);
3599 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3600 tod_stamp(tod_log));
3604 /* Handle the case when we have removed the setuid privilege because of -C or
3605 -D. This means that the caller of Exim was not root.
3607 There is a problem if we were running as the Exim user. The sysadmin may
3608 expect this case to retain privilege because "the binary was called by the
3609 Exim user", but it hasn't, because either the -D option set macros, or the
3610 -C option set a non-trusted configuration file. There are two possibilities:
3612 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3613 to do message deliveries. Thus, the fact that it is running as a
3614 non-privileged user is plausible, and might be wanted in some special
3615 configurations. However, really_exim will have been set false when
3616 privilege was dropped, to stop Exim trying to write to its normal log
3617 files. Therefore, re-enable normal log processing, assuming the sysadmin
3618 has set up the log directory correctly.
3620 (2) If deliver_drop_privilege is not set, the configuration won't work as
3621 apparently intended, and so we log a panic message. In order to retain
3622 root for -C or -D, the caller must either be root or be invoking a
3623 trusted configuration file (when deliver_drop_privilege is false). */
3625 if (removed_privilege && (!trusted_config || macros != NULL) &&
3626 real_uid == exim_uid)
3628 if (deliver_drop_privilege)
3629 really_exim = TRUE; /* let logging work normally */
3631 log_write(0, LOG_MAIN|LOG_PANIC,
3632 "exim user lost privilege for using %s option",
3633 trusted_config? "-D" : "-C");
3636 /* Start up Perl interpreter if Perl support is configured and there is a
3637 perl_startup option, and the configuration or the command line specifies
3638 initializing starting. Note that the global variables are actually called
3639 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3642 if (perl_start_option != 0)
3643 opt_perl_at_start = (perl_start_option > 0);
3644 if (opt_perl_at_start && opt_perl_startup != NULL)
3647 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3648 errstr = init_perl(opt_perl_startup);
3651 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3652 return EXIT_FAILURE;
3654 opt_perl_started = TRUE;
3656 #endif /* EXIM_PERL */
3658 /* Log the arguments of the call if the configuration file said so. This is
3659 a debugging feature for finding out what arguments certain MUAs actually use.
3660 Don't attempt it if logging is disabled, or if listing variables or if
3661 verifying/testing addresses or expansions. */
3663 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3664 && really_exim && !list_options && !checking)
3667 uschar *p = big_buffer;
3669 (void)getcwd(CS p+4, big_buffer_size - 4);
3671 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3673 for (i = 0; i < argc; i++)
3675 int len = Ustrlen(argv[i]);
3678 if (p + len + 8 >= big_buffer + big_buffer_size)
3681 log_write(0, LOG_MAIN, "%s", big_buffer);
3682 Ustrcpy(big_buffer, "...");
3685 printing = string_printing(argv[i]);
3686 if (printing[0] == 0) quote = US"\""; else
3688 uschar *pp = printing;
3690 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3692 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3693 (p - big_buffer) - 4), printing, quote);
3697 if ((log_extra_selector & LX_arguments) != 0)
3698 log_write(0, LOG_MAIN, "%s", big_buffer);
3700 debug_printf("%s\n", big_buffer);
3703 /* Set the working directory to be the top-level spool directory. We don't rely
3704 on this in the code, which always uses fully qualified names, but it's useful
3705 for core dumps etc. Don't complain if it fails - the spool directory might not
3706 be generally accessible and calls with the -C option (and others) have lost
3707 privilege by now. Before the chdir, we try to ensure that the directory exists.
3710 if (Uchdir(spool_directory) != 0)
3712 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3713 (void)Uchdir(spool_directory);
3716 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3717 alias file. Exim doesn't have such a concept, but this call is screwed into
3718 Sun's YP makefiles. Handle this by calling a configured script, as the real
3719 user who called Exim. The -oA option can be used to pass an argument to the
3724 (void)fclose(config_file);
3725 if (bi_command != NULL)
3729 argv[i++] = bi_command;
3730 if (alias_arg != NULL) argv[i++] = alias_arg;
3733 setgroups(group_count, group_list);
3734 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3736 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3737 (argv[1] == NULL)? US"" : argv[1]);
3739 execv(CS argv[0], (char *const *)argv);
3740 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3745 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3750 /* If an action on specific messages is requested, or if a daemon or queue
3751 runner is being started, we need to know if Exim was called by an admin user.
3752 This is the case if the real user is root or exim, or if the real group is
3753 exim, or if one of the supplementary groups is exim or a group listed in
3754 admin_groups. We don't fail all message actions immediately if not admin_user,
3755 since some actions can be performed by non-admin users. Instead, set admin_user
3756 for later interrogation. */
3758 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3763 for (i = 0; i < group_count; i++)
3765 if (group_list[i] == exim_gid) admin_user = TRUE;
3766 else if (admin_groups != NULL)
3768 for (j = 1; j <= (int)(admin_groups[0]); j++)
3769 if (admin_groups[j] == group_list[i])
3770 { admin_user = TRUE; break; }
3772 if (admin_user) break;
3776 /* Another group of privileged users are the trusted users. These are root,
3777 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3778 are permitted to specify sender_addresses with -f on the command line, and
3779 other message parameters as well. */
3781 if (real_uid == root_uid || real_uid == exim_uid)
3782 trusted_caller = TRUE;
3787 if (trusted_users != NULL)
3789 for (i = 1; i <= (int)(trusted_users[0]); i++)
3790 if (trusted_users[i] == real_uid)
3791 { trusted_caller = TRUE; break; }
3794 if (!trusted_caller && trusted_groups != NULL)
3796 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3798 if (trusted_groups[i] == real_gid)
3799 trusted_caller = TRUE;
3800 else for (j = 0; j < group_count; j++)
3802 if (trusted_groups[i] == group_list[j])
3803 { trusted_caller = TRUE; break; }
3805 if (trusted_caller) break;
3810 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3811 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3813 /* Only an admin user may start the daemon or force a queue run in the default
3814 configuration, but the queue run restriction can be relaxed. Only an admin
3815 user may request that a message be returned to its sender forthwith. Only an
3816 admin user may specify a debug level greater than D_v (because it might show
3817 passwords, etc. in lookup queries). Only an admin user may request a queue
3818 count. Only an admin user can use the test interface to scan for email
3819 (because Exim will be in the spool dir and able to look at mails). */
3823 BOOL debugset = (debug_selector & ~D_v) != 0;
3824 if (deliver_give_up || daemon_listen || malware_test_file ||
3825 (count_queue && queue_list_requires_admin) ||
3826 (list_queue && queue_list_requires_admin) ||
3827 (queue_interval >= 0 && prod_requires_admin) ||
3828 (debugset && !running_in_test_harness))
3830 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3835 /* If the real user is not root or the exim uid, the argument for passing
3836 in an open TCP/IP connection for another message is not permitted, nor is
3837 running with the -N option for any delivery action, unless this call to exim is
3838 one that supplied an input message, or we are using a patched exim for
3839 regression testing. */
3841 if (real_uid != root_uid && real_uid != exim_uid &&
3842 (continue_hostname != NULL ||
3844 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3845 )) && !running_in_test_harness)
3847 fprintf(stderr, "exim: Permission denied\n");
3848 return EXIT_FAILURE;
3851 /* If the caller is not trusted, certain arguments are ignored when running for
3852 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3853 Note that authority for performing certain actions on messages is tested in the
3854 queue_action() function. */
3856 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3858 sender_host_name = sender_host_address = interface_address =
3859 sender_ident = received_protocol = NULL;
3860 sender_host_port = interface_port = 0;
3861 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3864 /* If a sender host address is set, extract the optional port number off the
3865 end of it and check its syntax. Do the same thing for the interface address.
3866 Exim exits if the syntax is bad. */
3870 if (sender_host_address != NULL)
3871 sender_host_port = check_port(sender_host_address);
3872 if (interface_address != NULL)
3873 interface_port = check_port(interface_address);
3876 /* If an SMTP message is being received check to see if the standard input is a
3877 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3878 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3883 union sockaddr_46 inetd_sock;
3884 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3885 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3887 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3888 if (family == AF_INET || family == AF_INET6)
3890 union sockaddr_46 interface_sock;
3891 size = sizeof(interface_sock);
3893 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3894 interface_address = host_ntoa(-1, &interface_sock, NULL,
3897 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3899 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3902 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3903 NULL, &sender_host_port);
3904 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3905 "inetd is not supported when mua_wrapper is set");
3910 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3911 return EXIT_FAILURE;
3917 /* If the load average is going to be needed while receiving a message, get it
3918 now for those OS that require the first call to os_getloadavg() to be done as
3919 root. There will be further calls later for each message received. */
3921 #ifdef LOAD_AVG_NEEDS_ROOT
3922 if (receiving_message &&
3923 (queue_only_load >= 0 ||
3924 (is_inetd && smtp_load_reserve >= 0)
3927 load_average = OS_GETLOADAVG();
3931 /* The queue_only configuration option can be overridden by -odx on the command
3932 line, except that if queue_only_override is false, queue_only cannot be unset
3933 from the command line. */
3935 if (queue_only_set && (queue_only_override || arg_queue_only))
3936 queue_only = arg_queue_only;
3938 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3941 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3942 if (arg_smtp_receive_timeout >= 0)
3943 smtp_receive_timeout = arg_smtp_receive_timeout;
3945 /* If Exim was started with root privilege, unless we have already removed the
3946 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3947 except when starting the daemon or doing some kind of delivery or address
3948 testing (-bt). These are the only cases when root need to be retained. We run
3949 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3950 retained only for starting the daemon. We always do the initgroups() in this
3951 situation (controlled by the TRUE below), in order to be as close as possible
3952 to the state Exim usually runs in. */
3954 if (!unprivileged && /* originally had root AND */
3955 !removed_privilege && /* still got root AND */
3956 !daemon_listen && /* not starting the daemon */
3957 queue_interval <= 0 && /* (either kind of daemon) */
3959 deliver_drop_privilege || /* requested unprivileged */
3961 queue_interval < 0 && /* not running the queue */
3962 (msg_action_arg < 0 || /* and */
3963 msg_action != MSG_DELIVER) && /* not delivering and */
3964 (!checking || !address_test_mode) /* not address checking */
3968 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3971 /* When we are retaining a privileged uid, we still change to the exim gid. */
3976 rv = setgid(exim_gid);
3977 /* Impact of failure is that some stuff might end up with an incorrect group.
3978 We track this for failures from root, since any attempt to change privilege
3979 by root should succeed and failures should be examined. For non-root,
3980 there's no security risk. For me, it's { exim -bV } on a just-built binary,
3981 no need to complain then. */
3984 if (!(unprivileged || removed_privilege))
3987 "exim: changing group failed: %s\n", strerror(errno));
3991 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
3992 (long int)exim_gid, strerror(errno));
3996 /* Handle a request to scan a file for malware */
3997 if (malware_test_file)
3999 #ifdef WITH_CONTENT_SCAN
4001 set_process_info("scanning file for malware");
4002 result = malware_in_file(malware_test_file);
4005 printf("No malware found.\n");
4010 printf("Malware lookup returned non-okay/fail: %d\n", result);
4014 printf("Malware found: %s\n", malware_name);
4016 printf("Malware scan detected malware of unknown name.\n");
4018 printf("Malware scanning not enabled at compile time.\n");
4023 /* Handle a request to list the delivery queue */
4027 set_process_info("listing the queue");
4028 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4032 /* Handle a request to count the delivery queue */
4036 set_process_info("counting the queue");
4041 /* Handle actions on specific messages, except for the force delivery and
4042 message load actions, which are done below. Some actions take a whole list of
4043 message ids, which are known to continue up to the end of the arguments. Others
4044 take a single message id and then operate on the recipients list. */
4046 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4048 int yield = EXIT_SUCCESS;
4049 set_process_info("acting on specified messages");
4051 if (!one_msg_action)
4053 for (i = msg_action_arg; i < argc; i++)
4054 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4055 yield = EXIT_FAILURE;
4058 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4059 recipients_arg)) yield = EXIT_FAILURE;
4063 /* All the modes below here require the remaining configuration sections
4064 to be read, except that we can skip over the ACL setting when delivering
4065 specific messages, or doing a queue run. (For various testing cases we could
4066 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4069 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4071 /* The configuration data will have been read into POOL_PERM because we won't
4072 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4073 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4074 configuration were read into POOL_MAIN, because we don't do any resets till
4075 later on. However, it seems right, and it does ensure that both pools get used.
4078 store_pool = POOL_MAIN;
4080 /* Handle the -brt option. This is for checking out retry configurations.
4081 The next three arguments are a domain name or a complete address, and
4082 optionally two error numbers. All it does is to call the function that
4083 scans the retry configuration data. */
4085 if (test_retry_arg >= 0)
4087 retry_config *yield;
4088 int basic_errno = 0;
4092 if (test_retry_arg >= argc)
4094 printf("-brt needs a domain or address argument\n");
4095 exim_exit(EXIT_FAILURE);
4097 s1 = argv[test_retry_arg++];
4100 /* If the first argument contains no @ and no . it might be a local user
4101 or it might be a single-component name. Treat as a domain. */
4103 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4105 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4106 "being \ntreated as a one-component domain, not as a local part.\n\n",
4110 /* There may be an optional second domain arg. */
4112 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4113 s2 = argv[test_retry_arg++];
4115 /* The final arg is an error name */
4117 if (test_retry_arg < argc)
4119 uschar *ss = argv[test_retry_arg];
4121 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4124 printf("%s\n", CS error);
4125 return EXIT_FAILURE;
4128 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4129 code > 100 as an error is for matching codes to the decade. Turn them into
4130 a real error code, off the decade. */
4132 if (basic_errno == ERRNO_MAIL4XX ||
4133 basic_errno == ERRNO_RCPT4XX ||
4134 basic_errno == ERRNO_DATA4XX)
4136 int code = (more_errno >> 8) & 255;
4138 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4139 else if (code > 100)
4140 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4144 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4145 if (yield == NULL) printf("No retry information found\n"); else
4148 more_errno = yield->more_errno;
4149 printf("Retry rule: %s ", yield->pattern);
4151 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4153 printf("quota%s%s ",
4154 (more_errno > 0)? "_" : "",
4155 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4157 else if (yield->basic_errno == ECONNREFUSED)
4159 printf("refused%s%s ",
4160 (more_errno > 0)? "_" : "",
4161 (more_errno == 'M')? "MX" :
4162 (more_errno == 'A')? "A" : "");
4164 else if (yield->basic_errno == ETIMEDOUT)
4167 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4169 if (more_errno != 0) printf("_%s",
4170 (more_errno == 'M')? "MX" : "A");
4173 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4174 printf("auth_failed ");
4177 for (r = yield->rules; r != NULL; r = r->next)
4179 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4180 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4186 printf(",%d.", x/1000);
4200 exim_exit(EXIT_SUCCESS);
4203 /* Handle a request to list one or more configuration options */
4207 set_process_info("listing variables");
4208 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4209 else for (i = recipients_arg; i < argc; i++)
4212 (Ustrcmp(argv[i], "router") == 0 ||
4213 Ustrcmp(argv[i], "transport") == 0 ||
4214 Ustrcmp(argv[i], "authenticator") == 0 ||
4215 Ustrcmp(argv[i], "macro") == 0))
4217 readconf_print(argv[i+1], argv[i]);
4220 else readconf_print(argv[i], NULL);
4222 exim_exit(EXIT_SUCCESS);
4226 /* Handle a request to deliver one or more messages that are already on the
4227 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4228 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4230 Delivery of specific messages is typically used for a small number when
4231 prodding by hand (when the option forced_delivery will be set) or when
4232 re-execing to regain root privilege. Each message delivery must happen in a
4233 separate process, so we fork a process for each one, and run them sequentially
4234 so that debugging output doesn't get intertwined, and to avoid spawning too
4235 many processes if a long list is given. However, don't fork for the last one;
4236 this saves a process in the common case when Exim is called to deliver just one
4239 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4241 if (prod_requires_admin && !admin_user)
4243 fprintf(stderr, "exim: Permission denied\n");
4244 exim_exit(EXIT_FAILURE);
4246 set_process_info("delivering specified messages");
4247 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4248 for (i = msg_action_arg; i < argc; i++)
4253 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4254 else if ((pid = fork()) == 0)
4256 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4257 _exit(EXIT_SUCCESS);
4261 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4263 exim_exit(EXIT_FAILURE);
4267 exim_exit(EXIT_SUCCESS);
4271 /* If only a single queue run is requested, without SMTP listening, we can just
4272 turn into a queue runner, with an optional starting message id. */
4274 if (queue_interval == 0 && !daemon_listen)
4276 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4277 (start_queue_run_id == NULL)? US"" : US" starting at ",
4278 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4279 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4280 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4281 set_process_info("running the queue (single queue run)");
4282 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4283 exim_exit(EXIT_SUCCESS);
4287 /* Find the login name of the real user running this process. This is always
4288 needed when receiving a message, because it is written into the spool file. It
4289 may also be used to construct a from: or a sender: header, and in this case we
4290 need the user's full name as well, so save a copy of it, checked for RFC822
4291 syntax and munged if necessary, if it hasn't previously been set by the -F
4292 argument. We may try to get the passwd entry more than once, in case NIS or
4293 other delays are in evidence. Save the home directory for use in filter testing
4298 if ((pw = getpwuid(real_uid)) != NULL)
4300 originator_login = string_copy(US pw->pw_name);
4301 originator_home = string_copy(US pw->pw_dir);
4303 /* If user name has not been set by -F, set it from the passwd entry
4304 unless -f has been used to set the sender address by a trusted user. */
4306 if (originator_name == NULL)
4308 if (sender_address == NULL ||
4309 (!trusted_caller && filter_test == FTEST_NONE))
4311 uschar *name = US pw->pw_gecos;
4312 uschar *amp = Ustrchr(name, '&');
4315 /* Most Unix specify that a '&' character in the gecos field is
4316 replaced by a copy of the login name, and some even specify that
4317 the first character should be upper cased, so that's what we do. */
4322 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4323 amp - name, name, &loffset, originator_login, amp + 1);
4324 buffer[loffset] = toupper(buffer[loffset]);
4328 /* If a pattern for matching the gecos field was supplied, apply
4329 it and then expand the name string. */
4331 if (gecos_pattern != NULL && gecos_name != NULL)
4334 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4336 if (regex_match_and_setup(re, name, 0, -1))
4338 uschar *new_name = expand_string(gecos_name);
4340 if (new_name != NULL)
4342 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4343 "gecos field \"%s\"\n", new_name, name);
4346 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4347 "\"%s\": %s\n", gecos_name, expand_string_message);
4349 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4350 "gecos field \"%s\"\n", gecos_pattern, name);
4351 store_free((void *)re);
4353 originator_name = string_copy(name);
4356 /* A trusted caller has used -f but not -F */
4358 else originator_name = US"";
4361 /* Break the retry loop */
4366 if (++i > finduser_retries) break;
4370 /* If we cannot get a user login, log the incident and give up, unless the
4371 configuration specifies something to use. When running in the test harness,
4372 any setting of unknown_login overrides the actual name. */
4374 if (originator_login == NULL || running_in_test_harness)
4376 if (unknown_login != NULL)
4378 originator_login = expand_string(unknown_login);
4379 if (originator_name == NULL && unknown_username != NULL)
4380 originator_name = expand_string(unknown_username);
4381 if (originator_name == NULL) originator_name = US"";
4383 if (originator_login == NULL)
4384 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4388 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4391 originator_name = string_copy(parse_fix_phrase(originator_name,
4392 Ustrlen(originator_name), big_buffer, big_buffer_size));
4394 /* If a message is created by this call of Exim, the uid/gid of its originator
4395 are those of the caller. These values are overridden if an existing message is
4396 read in from the spool. */
4398 originator_uid = real_uid;
4399 originator_gid = real_gid;
4401 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4402 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4404 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4405 returns. We leave this till here so that the originator_ fields are available
4406 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4409 if (daemon_listen || queue_interval > 0)
4413 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4414 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4415 "mua_wrapper is set");
4420 /* If the sender ident has not been set (by a trusted caller) set it to
4421 the caller. This will get overwritten below for an inetd call. If a trusted
4422 caller has set it empty, unset it. */
4424 if (sender_ident == NULL) sender_ident = originator_login;
4425 else if (sender_ident[0] == 0) sender_ident = NULL;
4427 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4428 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4429 originator_* variables set. */
4431 if (test_rewrite_arg >= 0)
4433 really_exim = FALSE;
4434 if (test_rewrite_arg >= argc)
4436 printf("-brw needs an address argument\n");
4437 exim_exit(EXIT_FAILURE);
4439 rewrite_test(argv[test_rewrite_arg]);
4440 exim_exit(EXIT_SUCCESS);
4443 /* A locally-supplied message is considered to be coming from a local user
4444 unless a trusted caller supplies a sender address with -f, or is passing in the
4445 message via SMTP (inetd invocation or otherwise). */
4447 if ((sender_address == NULL && !smtp_input) ||
4448 (!trusted_caller && filter_test == FTEST_NONE))
4450 sender_local = TRUE;
4452 /* A trusted caller can supply authenticated_sender and authenticated_id
4453 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4454 defaults except when host checking. */
4456 if (authenticated_sender == NULL && !host_checking)
4457 authenticated_sender = string_sprintf("%s@%s", originator_login,
4458 qualify_domain_sender);
4459 if (authenticated_id == NULL && !host_checking)
4460 authenticated_id = originator_login;
4463 /* Trusted callers are always permitted to specify the sender address.
4464 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4465 is specified is the empty address. However, if a trusted caller does not
4466 specify a sender address for SMTP input, we leave sender_address unset. This
4467 causes the MAIL commands to be honoured. */
4469 if ((!smtp_input && sender_address == NULL) ||
4470 !receive_check_set_sender(sender_address))
4472 /* Either the caller is not permitted to set a general sender, or this is
4473 non-SMTP input and the trusted caller has not set a sender. If there is no
4474 sender, or if a sender other than <> is set, override with the originator's
4475 login (which will get qualified below), except when checking things. */
4477 if (sender_address == NULL /* No sender_address set */
4479 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4480 !checking && /* Not running tests, AND */
4481 filter_test == FTEST_NONE)) /* Not testing a filter */
4483 sender_address = originator_login;
4484 sender_address_forced = FALSE;
4485 sender_address_domain = 0;
4489 /* Remember whether an untrusted caller set the sender address */
4491 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4493 /* Ensure that the sender address is fully qualified unless it is the empty
4494 address, which indicates an error message, or doesn't exist (root caller, smtp
4495 interface, no -f argument). */
4497 if (sender_address != NULL && sender_address[0] != 0 &&
4498 sender_address_domain == 0)
4499 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4500 qualify_domain_sender);
4502 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4504 /* Handle a request to verify a list of addresses, or test them for delivery.
4505 This must follow the setting of the sender address, since routers can be
4506 predicated upon the sender. If no arguments are given, read addresses from
4507 stdin. Set debug_level to at least D_v to get full output for address testing.
4510 if (verify_address_mode || address_test_mode)
4513 int flags = vopt_qualify;
4515 if (verify_address_mode)
4517 if (!verify_as_sender) flags |= vopt_is_recipient;
4518 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4523 flags |= vopt_is_recipient;
4524 debug_selector |= D_v;
4525 debug_file = stderr;
4526 debug_fd = fileno(debug_file);
4527 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4530 if (recipients_arg < argc)
4532 while (recipients_arg < argc)
4534 uschar *s = argv[recipients_arg++];
4537 BOOL finished = FALSE;
4538 uschar *ss = parse_find_address_end(s, FALSE);
4539 if (*ss == ',') *ss = 0; else finished = TRUE;
4540 test_address(s, flags, &exit_value);
4543 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4550 uschar *s = get_stdinput(NULL, NULL);
4551 if (s == NULL) break;
4552 test_address(s, flags, &exit_value);
4556 exim_exit(exit_value);
4559 /* Handle expansion checking. Either expand items on the command line, or read
4560 from stdin if there aren't any. If -Mset was specified, load the message so
4561 that its variables can be used, but restrict this facility to admin users.
4562 Otherwise, if -bem was used, read a message from stdin. */
4566 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4568 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4571 fprintf(stderr, "exim: permission denied\n");
4574 message_id = argv[msg_action_arg];
4575 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4576 if (!spool_open_datafile(message_id))
4577 printf ("Failed to load message datafile %s\n", message_id);
4578 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4579 printf ("Failed to load message %s\n", message_id);
4582 /* Read a test message from a file. We fudge it up to be on stdin, saving
4583 stdin itself for later reading of expansion strings. */
4585 else if (expansion_test_message != NULL)
4587 int save_stdin = dup(0);
4588 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4591 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4593 return EXIT_FAILURE;
4596 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4597 message_ended = END_NOTENDED;
4598 read_message_body(receive_msg(extract_recipients));
4599 message_linecount += body_linecount;
4600 (void)dup2(save_stdin, 0);
4601 (void)close(save_stdin);
4602 clearerr(stdin); /* Required by Darwin */
4605 /* Allow $recipients for this testing */
4607 enable_dollar_recipients = TRUE;
4609 /* Expand command line items */
4611 if (recipients_arg < argc)
4613 while (recipients_arg < argc)
4615 uschar *s = argv[recipients_arg++];
4616 uschar *ss = expand_string(s);
4617 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4618 else printf("%s\n", CS ss);
4626 char *(*fn_readline)(const char *) = NULL;
4627 void (*fn_addhist)(const char *) = NULL;
4630 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4636 uschar *source = get_stdinput(fn_readline, fn_addhist);
4637 if (source == NULL) break;
4638 ss = expand_string(source);
4640 printf ("Failed: %s\n", expand_string_message);
4641 else printf("%s\n", CS ss);
4645 if (dlhandle != NULL) dlclose(dlhandle);
4649 /* The data file will be open after -Mset */
4651 if (deliver_datafile >= 0)
4653 (void)close(deliver_datafile);
4654 deliver_datafile = -1;
4657 exim_exit(EXIT_SUCCESS);
4661 /* The active host name is normally the primary host name, but it can be varied
4662 for hosts that want to play several parts at once. We need to ensure that it is
4663 set for host checking, and for receiving messages. */
4665 smtp_active_hostname = primary_hostname;
4666 if (raw_active_hostname != NULL)
4668 uschar *nah = expand_string(raw_active_hostname);
4671 if (!expand_string_forcedfail)
4672 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4673 "(smtp_active_hostname): %s", raw_active_hostname,
4674 expand_string_message);
4676 else if (nah[0] != 0) smtp_active_hostname = nah;
4679 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4680 given IP address so that the blocking and relay configuration can be tested.
4681 Unless a sender_ident was set by -oMt, we discard it (the default is the
4682 caller's login name). An RFC 1413 call is made only if we are running in the
4683 test harness and an incoming interface and both ports are specified, because
4684 there is no TCP/IP call to find the ident for. */
4691 if (!sender_ident_set)
4693 sender_ident = NULL;
4694 if (running_in_test_harness && sender_host_port != 0 &&
4695 interface_address != NULL && interface_port != 0)
4696 verify_get_ident(1413);
4699 /* In case the given address is a non-canonical IPv6 address, canonicize
4700 it. The code works for both IPv4 and IPv6, as it happens. */
4702 size = host_aton(sender_host_address, x);
4703 sender_host_address = store_get(48); /* large enough for full IPv6 */
4704 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4706 /* Now set up for testing */
4708 host_build_sender_fullhost();
4712 sender_local = FALSE;
4713 sender_host_notsocket = TRUE;
4714 debug_file = stderr;
4715 debug_fd = fileno(debug_file);
4716 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4717 "**** but without any ident (RFC 1413) callback.\n"
4718 "**** This is not for real!\n\n",
4719 sender_host_address);
4721 if (verify_check_host(&hosts_connection_nolog) == OK)
4722 log_write_selector &= ~L_smtp_connection;
4723 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4725 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4726 because a log line has already been written for all its failure exists
4727 (usually "connection refused: <reason>") and writing another one is
4728 unnecessary clutter. */
4730 if (smtp_start_session())
4732 reset_point = store_get(0);
4735 store_reset(reset_point);
4736 if (smtp_setup_msg() <= 0) break;
4737 if (!receive_msg(FALSE)) break;
4741 exim_exit(EXIT_SUCCESS);
4745 /* Arrange for message reception if recipients or SMTP were specified;
4746 otherwise complain unless a version print (-bV) happened or this is a filter
4747 verification test. In the former case, show the configuration file name. */
4749 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4751 if (version_printed)
4753 printf("Configuration file is %s\n", config_main_filename);
4754 return EXIT_SUCCESS;
4757 if (filter_test == FTEST_NONE)
4758 exim_usage(called_as);
4762 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4763 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4764 that we are not called from inetd, because that is rejected above. The
4765 following configuration settings are forced here:
4767 (1) Synchronous delivery (-odi)
4768 (2) Errors to stderr (-oep == -oeq)
4769 (3) No parallel remote delivery
4770 (4) Unprivileged delivery
4772 We don't force overall queueing options because there are several of them;
4773 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4774 to override any SMTP queueing. */
4778 synchronous_delivery = TRUE;
4779 arg_error_handling = ERRORS_STDERR;
4780 remote_max_parallel = 1;
4781 deliver_drop_privilege = TRUE;
4783 queue_smtp_domains = NULL;
4787 /* Prepare to accept one or more new messages on the standard input. When a
4788 message has been read, its id is returned in message_id[]. If doing immediate
4789 delivery, we fork a delivery process for each received message, except for the
4790 last one, where we can save a process switch.
4792 It is only in non-smtp mode that error_handling is allowed to be changed from
4793 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4794 sendmail error modes other than -oem ever actually used? Later: yes.) */
4796 if (!smtp_input) error_handling = arg_error_handling;
4798 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4799 logging being sent down the socket and make an identd call to get the
4804 (void)fclose(stderr);
4805 exim_nullstd(); /* Re-open to /dev/null */
4806 verify_get_ident(IDENT_PORT);
4807 host_build_sender_fullhost();
4808 set_process_info("handling incoming connection from %s via inetd",
4812 /* If the sender host address has been set, build sender_fullhost if it hasn't
4813 already been done (which it will have been for inetd). This caters for the
4814 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4815 so that the test for IP options is skipped for -bs input. */
4817 if (sender_host_address != NULL && sender_fullhost == NULL)
4819 host_build_sender_fullhost();
4820 set_process_info("handling incoming connection from %s via -oMa",
4822 sender_host_notsocket = TRUE;
4825 /* Otherwise, set the sender host as unknown except for inetd calls. This
4826 prevents host checking in the case of -bs not from inetd and also for -bS. */
4828 else if (!is_inetd) sender_host_unknown = TRUE;
4830 /* If stdout does not exist, then dup stdin to stdout. This can happen
4831 if exim is started from inetd. In this case fd 0 will be set to the socket,
4832 but fd 1 will not be set. This also happens for passed SMTP channels. */
4834 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4836 /* Set up the incoming protocol name and the state of the program. Root is
4837 allowed to force received protocol via the -oMr option above. If we have come
4838 via inetd, the process info has already been set up. We don't set
4839 received_protocol here for smtp input, as it varies according to
4840 batch/HELO/EHLO/AUTH/TLS. */
4844 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4845 smtp_batched_input? "batched " : "",
4846 (sender_address!= NULL)? sender_address : originator_login);
4850 if (received_protocol == NULL)
4851 received_protocol = string_sprintf("local%s", called_as);
4852 set_process_info("accepting a local non-SMTP message from <%s>",
4856 /* Initialize the session_local_queue-only flag (this will be ignored if
4857 mua_wrapper is set) */
4860 session_local_queue_only = queue_only;
4862 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4863 the spool if so configured. On failure, we must not attempt to send an error
4864 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4865 error code is given.) */
4867 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4869 fprintf(stderr, "exim: insufficient disk space\n");
4870 return EXIT_FAILURE;
4873 /* If this is smtp input of any kind, real or batched, handle the start of the
4876 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4877 because a log line has already been written for all its failure exists
4878 (usually "connection refused: <reason>") and writing another one is
4879 unnecessary clutter. */
4885 if (verify_check_host(&hosts_connection_nolog) == OK)
4886 log_write_selector &= ~L_smtp_connection;
4887 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4888 if (!smtp_start_session())
4891 exim_exit(EXIT_SUCCESS);
4895 /* Otherwise, set up the input size limit here. */
4899 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4900 if (expand_string_message != NULL)
4902 if (thismessage_size_limit == -1)
4903 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4904 "message_size_limit: %s", expand_string_message);
4906 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4907 "message_size_limit: %s", expand_string_message);
4911 /* Loop for several messages when reading SMTP input. If we fork any child
4912 processes, we don't want to wait for them unless synchronous delivery is
4913 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4914 same as SIG_DFL, despite the fact that documentation often lists the default as
4915 "ignore". This is a confusing area. This is what I know:
4917 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4918 processes that complete simply to go away without ever becoming defunct. You
4919 can't then wait for them - but we don't want to wait for them in the
4920 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4921 happen for all OS (e.g. *BSD is different).
4923 But that's not the end of the story. Some (many? all?) systems have the
4924 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4925 has by default, so it seems that the difference is merely one of default
4926 (compare restarting vs non-restarting signals).
4928 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4929 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4930 of the loop below. Paranoia rules.
4932 February 2003: That's *still* not the end of the story. There are now versions
4933 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4934 process then calls waitpid(), a grumble is written to the system log, because
4935 this is logically inconsistent. In other words, it doesn't like the paranoia.
4936 As a consequenc of this, the waitpid() below is now excluded if we are sure
4937 that SIG_IGN works. */
4939 if (!synchronous_delivery)
4942 struct sigaction act;
4943 act.sa_handler = SIG_IGN;
4944 sigemptyset(&(act.sa_mask));
4945 act.sa_flags = SA_NOCLDWAIT;
4946 sigaction(SIGCHLD, &act, NULL);
4948 signal(SIGCHLD, SIG_IGN);
4952 /* Save the current store pool point, for resetting at the start of
4953 each message, and save the real sender address, if any. */
4955 reset_point = store_get(0);
4956 real_sender_address = sender_address;
4958 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4959 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4964 store_reset(reset_point);
4967 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4968 input and build the recipients list, before calling receive_msg() to read the
4969 message proper. Whatever sender address is given in the SMTP transaction is
4970 often ignored for local senders - we use the actual sender, which is normally
4971 either the underlying user running this process or a -f argument provided by
4972 a trusted caller. It is saved in real_sender_address. The test for whether to
4973 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4978 if ((rc = smtp_setup_msg()) > 0)
4980 if (real_sender_address != NULL &&
4981 !receive_check_set_sender(sender_address))
4983 sender_address = raw_sender = real_sender_address;
4984 sender_address_unrewritten = NULL;
4987 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4988 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4989 the very end. The result of the ACL is ignored (as for other non-SMTP
4990 messages). It is run for its potential side effects. */
4992 if (smtp_batched_input && acl_not_smtp_start != NULL)
4994 uschar *user_msg, *log_msg;
4995 enable_dollar_recipients = TRUE;
4996 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4997 &user_msg, &log_msg);
4998 enable_dollar_recipients = FALSE;
5001 /* Now get the data for the message */
5003 more = receive_msg(extract_recipients);
5004 if (message_id[0] == 0)
5007 smtp_log_no_mail(); /* Log no mail if configured */
5008 exim_exit(EXIT_FAILURE);
5013 smtp_log_no_mail(); /* Log no mail if configured */
5014 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5018 /* In the non-SMTP case, we have all the information from the command
5019 line, but must process it in case it is in the more general RFC822
5020 format, and in any case, to detect syntax errors. Also, it appears that
5021 the use of comma-separated lists as single arguments is common, so we
5022 had better support them. */
5028 int count = argc - recipients_arg;
5029 uschar **list = argv + recipients_arg;
5031 /* These options cannot be changed dynamically for non-SMTP messages */
5033 active_local_sender_retain = local_sender_retain;
5034 active_local_from_check = local_from_check;
5036 /* Save before any rewriting */
5038 raw_sender = string_copy(sender_address);
5040 /* Loop for each argument */
5042 for (i = 0; i < count; i++)
5044 int start, end, domain;
5046 uschar *s = list[i];
5048 /* Loop for each comma-separated address */
5052 BOOL finished = FALSE;
5054 uschar *ss = parse_find_address_end(s, FALSE);
5056 if (*ss == ',') *ss = 0; else finished = TRUE;
5058 /* Check max recipients - if -t was used, these aren't recipients */
5060 if (recipients_max > 0 && ++rcount > recipients_max &&
5061 !extract_recipients)
5063 if (error_handling == ERRORS_STDERR)
5065 fprintf(stderr, "exim: too many recipients\n");
5066 exim_exit(EXIT_FAILURE);
5071 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5072 errors_sender_rc : EXIT_FAILURE;
5077 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5079 if (domain == 0 && !allow_unqualified_recipient)
5082 errmess = US"unqualified recipient address not allowed";
5085 if (recipient == NULL)
5087 if (error_handling == ERRORS_STDERR)
5089 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5090 string_printing(list[i]), errmess);
5091 exim_exit(EXIT_FAILURE);
5097 eblock.text1 = string_printing(list[i]);
5098 eblock.text2 = errmess;
5100 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5101 errors_sender_rc : EXIT_FAILURE;
5105 receive_add_recipient(recipient, -1);
5108 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5112 /* Show the recipients when debugging */
5117 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5118 if (recipients_list != NULL)
5120 debug_printf("Recipients:\n");
5121 for (i = 0; i < recipients_count; i++)
5122 debug_printf(" %s\n", recipients_list[i].address);
5126 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5127 ignored; rejecting here would just add complication, and it can just as
5128 well be done later. Allow $recipients to be visible in the ACL. */
5130 if (acl_not_smtp_start != NULL)
5132 uschar *user_msg, *log_msg;
5133 enable_dollar_recipients = TRUE;
5134 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5135 &user_msg, &log_msg);
5136 enable_dollar_recipients = FALSE;
5139 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5140 will just read the headers for the message, and not write anything onto the
5143 message_ended = END_NOTENDED;
5144 more = receive_msg(extract_recipients);
5146 /* more is always FALSE here (not SMTP message) when reading a message
5147 for real; when reading the headers of a message for filter testing,
5148 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5150 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5151 } /* Non-SMTP message reception */
5153 /* If this is a filter testing run, there are headers in store, but
5154 no message on the spool. Run the filtering code in testing mode, setting
5155 the domain to the qualify domain and the local part to the current user,
5156 unless they have been set by options. The prefix and suffix are left unset
5157 unless specified. The the return path is set to to the sender unless it has
5158 already been set from a return-path header in the message. */
5160 if (filter_test != FTEST_NONE)
5162 deliver_domain = (ftest_domain != NULL)?
5163 ftest_domain : qualify_domain_recipient;
5164 deliver_domain_orig = deliver_domain;
5165 deliver_localpart = (ftest_localpart != NULL)?
5166 ftest_localpart : originator_login;
5167 deliver_localpart_orig = deliver_localpart;
5168 deliver_localpart_prefix = ftest_prefix;
5169 deliver_localpart_suffix = ftest_suffix;
5170 deliver_home = originator_home;
5172 if (return_path == NULL)
5174 printf("Return-path copied from sender\n");
5175 return_path = string_copy(sender_address);
5179 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5181 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5183 receive_add_recipient(
5184 string_sprintf("%s%s%s@%s",
5185 (ftest_prefix == NULL)? US"" : ftest_prefix,
5187 (ftest_suffix == NULL)? US"" : ftest_suffix,
5188 deliver_domain), -1);
5190 printf("Recipient = %s\n", recipients_list[0].address);
5191 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5192 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5194 (void)chdir("/"); /* Get away from wherever the user is running this from */
5196 /* Now we run either a system filter test, or a user filter test, or both.
5197 In the latter case, headers added by the system filter will persist and be
5198 available to the user filter. We need to copy the filter variables
5201 if ((filter_test & FTEST_SYSTEM) != 0)
5203 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5204 exim_exit(EXIT_FAILURE);
5207 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5209 if ((filter_test & FTEST_USER) != 0)
5211 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5212 exim_exit(EXIT_FAILURE);
5215 exim_exit(EXIT_SUCCESS);
5218 /* Else act on the result of message reception. We should not get here unless
5219 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5220 will be TRUE. If it is not, check on the number of messages received in this
5223 if (!session_local_queue_only &&
5224 smtp_accept_queue_per_connection > 0 &&
5225 receive_messagecount > smtp_accept_queue_per_connection)
5227 session_local_queue_only = TRUE;
5228 queue_only_reason = 2;
5231 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5232 and queue_only_load is set, check that the load average is below it. If it is
5233 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5234 default), we put the whole session into queue_only mode. It then remains this
5235 way for any subsequent messages on the same SMTP connection. This is a
5236 deliberate choice; even though the load average may fall, it doesn't seem
5237 right to deliver later messages on the same call when not delivering earlier
5238 ones. However, there are odd cases where this is not wanted, so this can be
5239 changed by setting queue_only_load_latch false. */
5241 local_queue_only = session_local_queue_only;
5242 if (!local_queue_only && queue_only_load >= 0)
5244 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5245 if (local_queue_only)
5247 queue_only_reason = 3;
5248 if (queue_only_load_latch) session_local_queue_only = TRUE;
5252 /* If running as an MUA wrapper, all queueing options and freezing options
5256 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5258 /* Log the queueing here, when it will get a message id attached, but
5259 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5262 if (local_queue_only) switch(queue_only_reason)
5265 log_write(L_delay_delivery,
5266 LOG_MAIN, "no immediate delivery: more than %d messages "
5267 "received in one connection", smtp_accept_queue_per_connection);
5271 log_write(L_delay_delivery,
5272 LOG_MAIN, "no immediate delivery: load average %.2f",
5273 (double)load_average/1000.0);
5277 /* Else do the delivery unless the ACL or local_scan() called for queue only
5278 or froze the message. Always deliver in a separate process. A fork failure is
5279 not a disaster, as the delivery will eventually happen on a subsequent queue
5280 run. The search cache must be tidied before the fork, as the parent will
5281 do it before exiting. The child will trigger a lookup failure and
5282 thereby defer the delivery if it tries to use (for example) a cached ldap
5283 connection that the parent has called unbind on. */
5285 else if (!queue_only_policy && !deliver_freeze)
5290 if ((pid = fork()) == 0)
5293 close_unwanted(); /* Close unwanted file descriptors and TLS */
5294 exim_nullstd(); /* Ensure std{in,out,err} exist */
5296 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5297 mode, deliver_drop_privilege is forced TRUE). */
5299 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5301 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5303 /* Control does not return here. */
5306 /* No need to re-exec */
5308 rc = deliver_message(message_id, FALSE, FALSE);
5310 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5311 EXIT_SUCCESS : EXIT_FAILURE);
5316 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5317 "process: %s", strerror(errno));
5320 /* In the parent, wait if synchronous delivery is required. This will
5321 always be the case in MUA wrapper mode. */
5323 else if (synchronous_delivery)
5326 while (wait(&status) != pid);
5327 if ((status & 0x00ff) != 0)
5328 log_write(0, LOG_MAIN|LOG_PANIC,
5329 "process %d crashed with signal %d while delivering %s",
5330 (int)pid, status & 0x00ff, message_id);
5331 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5335 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5336 automatically reaps children (see comments above the loop), clear away any
5337 finished subprocesses here, in case there are lots of messages coming in
5338 from the same source. */
5340 #ifndef SIG_IGN_WORKS
5341 while (waitpid(-1, NULL, WNOHANG) > 0);
5345 exim_exit(EXIT_SUCCESS); /* Never returns */
5346 return 0; /* To stop compiler warning */