1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2012 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 extern void init_lookup_list(void);
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * 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 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
980 characters; unless it's an ancient version of PCRE in which case it
982 #ifndef PCRE_PRERELEASE
983 #define PCRE_PRERELEASE
986 #define EXPAND_AND_QUOTE(X) QUOTE(X)
987 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
989 PCRE_MAJOR, PCRE_MINOR,
990 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
993 #undef EXPAND_AND_QUOTE
996 for (i = 0; i < lookup_list_count; i++)
998 if (lookup_list[i]->version_report)
999 lookup_list[i]->version_report(f);
1002 #ifdef WHITELIST_D_MACROS
1003 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1005 fprintf(f, "WHITELIST_D_MACROS unset\n");
1007 #ifdef TRUSTED_CONFIG_LIST
1008 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1010 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1019 /*************************************************
1020 * Quote a local part *
1021 *************************************************/
1023 /* This function is used when a sender address or a From: or Sender: header
1024 line is being created from the caller's login, or from an authenticated_id. It
1025 applies appropriate quoting rules for a local part.
1027 Argument: the local part
1028 Returns: the local part, quoted if necessary
1032 local_part_quote(uschar *lpart)
1034 BOOL needs_quote = FALSE;
1039 for (t = lpart; !needs_quote && *t != 0; t++)
1041 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1042 (*t != '.' || t == lpart || t[1] == 0);
1045 if (!needs_quote) return lpart;
1048 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1052 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1055 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1058 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1059 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1060 yield = string_cat(yield, &size, &ptr, nq, 1);
1064 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1072 /*************************************************
1073 * Load readline() functions *
1074 *************************************************/
1076 /* This function is called from testing executions that read data from stdin,
1077 but only when running as the calling user. Currently, only -be does this. The
1078 function loads the readline() function library and passes back the functions.
1079 On some systems, it needs the curses library, so load that too, but try without
1080 it if loading fails. All this functionality has to be requested at build time.
1083 fn_readline_ptr pointer to where to put the readline pointer
1084 fn_addhist_ptr pointer to where to put the addhistory function
1086 Returns: the dlopen handle or NULL on failure
1090 set_readline(char * (**fn_readline_ptr)(const char *),
1091 void (**fn_addhist_ptr)(const char *))
1094 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1096 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1097 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1099 if (dlhandle != NULL)
1101 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1102 * char * readline (const char *prompt);
1103 * void add_history (const char *string);
1105 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1106 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1110 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1119 /*************************************************
1120 * Get a line from stdin for testing things *
1121 *************************************************/
1123 /* This function is called when running tests that can take a number of lines
1124 of input (for example, -be and -bt). It handles continuations and trailing
1125 spaces. And prompting and a blank line output on eof. If readline() is in use,
1126 the arguments are non-NULL and provide the relevant functions.
1129 fn_readline readline function or NULL
1130 fn_addhist addhist function or NULL
1132 Returns: pointer to dynamic memory, or NULL at end of file
1136 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1141 uschar *yield = NULL;
1143 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1147 uschar buffer[1024];
1151 char *readline_line = NULL;
1152 if (fn_readline != NULL)
1154 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1155 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1156 p = US readline_line;
1161 /* readline() not in use */
1164 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1168 /* Handle the line */
1170 ss = p + (int)Ustrlen(p);
1171 while (ss > p && isspace(ss[-1])) ss--;
1175 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1178 yield = string_cat(yield, &size, &ptr, p, ss - p);
1181 if (fn_readline != NULL) free(readline_line);
1184 if (ss == p || yield[ptr-1] != '\\')
1192 if (yield == NULL) printf("\n");
1198 /*************************************************
1199 * Output usage information for the program *
1200 *************************************************/
1202 /* This function is called when there are no recipients
1203 or a specific --help argument was added.
1206 progname information on what name we were called by
1208 Returns: DOES NOT RETURN
1212 exim_usage(uschar *progname)
1215 /* Handle specific program invocation varients */
1216 if (Ustrcmp(progname, US"-mailq") == 0)
1219 "mailq - list the contents of the mail queue\n\n"
1220 "For a list of options, see the Exim documentation.\n");
1224 /* Generic usage - we output this whatever happens */
1226 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1227 "not directly from a shell command line. Options and/or arguments control\n"
1228 "what it does when called. For a list of options, see the Exim documentation.\n");
1235 /*************************************************
1236 * Validate that the macros given are okay *
1237 *************************************************/
1239 /* Typically, Exim will drop privileges if macros are supplied. In some
1240 cases, we want to not do so.
1242 Arguments: none (macros is a global)
1243 Returns: true if trusted, false otherwise
1247 macros_trusted(void)
1249 #ifdef WHITELIST_D_MACROS
1251 uschar *whitelisted, *end, *p, **whites, **w;
1252 int white_count, i, n;
1254 BOOL prev_char_item, found;
1259 #ifndef WHITELIST_D_MACROS
1263 /* We only trust -D overrides for some invoking users:
1264 root, the exim run-time user, the optional config owner user.
1265 I don't know why config-owner would be needed, but since they can own the
1266 config files anyway, there's no security risk to letting them override -D. */
1267 if ( ! ((real_uid == root_uid)
1268 || (real_uid == exim_uid)
1269 #ifdef CONFIGURE_OWNER
1270 || (real_uid == config_uid)
1274 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1278 /* Get a list of macros which are whitelisted */
1279 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1280 prev_char_item = FALSE;
1282 for (p = whitelisted; *p != '\0'; ++p)
1284 if (*p == ':' || isspace(*p))
1289 prev_char_item = FALSE;
1292 if (!prev_char_item)
1293 prev_char_item = TRUE;
1300 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1301 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1306 if (i == white_count)
1308 while (*p != '\0' && p < end)
1314 /* The list of macros should be very short. Accept the N*M complexity. */
1315 for (m = macros; m != NULL; m = m->next)
1318 for (w = whites; *w; ++w)
1319 if (Ustrcmp(*w, m->name) == 0)
1326 if (m->replacement == NULL)
1328 len = Ustrlen(m->replacement);
1331 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1332 0, PCRE_EOPT, NULL, 0);
1335 if (n != PCRE_ERROR_NOMATCH)
1336 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1340 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1346 /*************************************************
1347 * Entry point and high-level code *
1348 *************************************************/
1350 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1351 the appropriate action. All the necessary functions are present in the one
1352 binary. I originally thought one should split it up, but it turns out that so
1353 much of the apparatus is needed in each chunk that one might as well just have
1354 it all available all the time, which then makes the coding easier as well.
1357 argc count of entries in argv
1358 argv argument strings, with argv[0] being the program name
1360 Returns: EXIT_SUCCESS if terminated successfully
1361 EXIT_FAILURE otherwise, except when a message has been sent
1362 to the sender, and -oee was given
1366 main(int argc, char **cargv)
1368 uschar **argv = USS cargv;
1369 int arg_receive_timeout = -1;
1370 int arg_smtp_receive_timeout = -1;
1371 int arg_error_handling = error_handling;
1372 int filter_sfd = -1;
1373 int filter_ufd = -1;
1376 int list_queue_option = 0;
1378 int msg_action_arg = -1;
1379 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1380 int queue_only_reason = 0;
1382 int perl_start_option = 0;
1384 int recipients_arg = argc;
1385 int sender_address_domain = 0;
1386 int test_retry_arg = -1;
1387 int test_rewrite_arg = -1;
1388 BOOL arg_queue_only = FALSE;
1389 BOOL bi_option = FALSE;
1390 BOOL checking = FALSE;
1391 BOOL count_queue = FALSE;
1392 BOOL expansion_test = FALSE;
1393 BOOL extract_recipients = FALSE;
1394 BOOL forced_delivery = FALSE;
1395 BOOL f_end_dot = FALSE;
1396 BOOL deliver_give_up = FALSE;
1397 BOOL list_queue = FALSE;
1398 BOOL list_options = FALSE;
1399 BOOL local_queue_only;
1401 BOOL one_msg_action = FALSE;
1402 BOOL queue_only_set = FALSE;
1403 BOOL receiving_message = TRUE;
1404 BOOL sender_ident_set = FALSE;
1405 BOOL session_local_queue_only;
1407 BOOL removed_privilege = FALSE;
1408 BOOL usage_wanted = FALSE;
1409 BOOL verify_address_mode = FALSE;
1410 BOOL verify_as_sender = FALSE;
1411 BOOL version_printed = FALSE;
1412 uschar *alias_arg = NULL;
1413 uschar *called_as = US"";
1414 uschar *start_queue_run_id = NULL;
1415 uschar *stop_queue_run_id = NULL;
1416 uschar *expansion_test_message = NULL;
1417 uschar *ftest_domain = NULL;
1418 uschar *ftest_localpart = NULL;
1419 uschar *ftest_prefix = NULL;
1420 uschar *ftest_suffix = NULL;
1421 uschar *malware_test_file = NULL;
1422 uschar *real_sender_address;
1423 uschar *originator_home = US"/";
1427 struct stat statbuf;
1428 pid_t passed_qr_pid = (pid_t)0;
1429 int passed_qr_pipe = -1;
1430 gid_t group_list[NGROUPS_MAX];
1432 /* Possible options for -R and -S */
1434 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1436 /* Need to define this in case we need to change the environment in order
1437 to get rid of a bogus time zone. We have to make it char rather than uschar
1438 because some OS define it in /usr/include/unistd.h. */
1440 extern char **environ;
1442 /* If the Exim user and/or group and/or the configuration file owner/group were
1443 defined by ref:name at build time, we must now find the actual uid/gid values.
1444 This is a feature to make the lives of binary distributors easier. */
1446 #ifdef EXIM_USERNAME
1447 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1451 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1455 /* If ref:name uses a number as the name, route_finduser() returns
1456 TRUE with exim_uid set and pw coerced to NULL. */
1458 exim_gid = pw->pw_gid;
1459 #ifndef EXIM_GROUPNAME
1463 "exim: ref:name should specify a usercode, not a group.\n"
1464 "exim: can't let you get away with it unless you also specify a group.\n");
1471 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1477 #ifdef EXIM_GROUPNAME
1478 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1480 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1486 #ifdef CONFIGURE_OWNERNAME
1487 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1489 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1490 CONFIGURE_OWNERNAME);
1495 /* We default the system_filter_user to be the Exim run-time user, as a
1496 sane non-root value. */
1497 system_filter_uid = exim_uid;
1499 #ifdef CONFIGURE_GROUPNAME
1500 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1502 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1503 CONFIGURE_GROUPNAME);
1508 /* In the Cygwin environment, some initialization needs doing. It is fudged
1509 in by means of this macro. */
1515 /* Check a field which is patched when we are running Exim within its
1516 testing harness; do a fast initial check, and then the whole thing. */
1518 running_in_test_harness =
1519 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1521 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1522 at the start of a program; however, it seems that some environments do not
1523 follow this. A "strange" locale can affect the formatting of timestamps, so we
1526 setlocale(LC_ALL, "C");
1528 /* Set up the default handler for timing using alarm(). */
1530 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1532 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1533 because store_malloc writes a log entry on failure. */
1535 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1536 if (log_buffer == NULL)
1538 fprintf(stderr, "exim: failed to get store for log buffer\n");
1542 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1543 NULL when the daemon is run and the file is closed. We have to use this
1544 indirection, because some systems don't allow writing to the variable "stderr".
1547 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1549 /* Arrange for the PCRE regex library to use our store functions. Note that
1550 the normal calls are actually macros that add additional arguments for
1551 debugging purposes so we have to assign specially constructed functions here.
1552 The default is to use store in the stacking pool, but this is overridden in the
1553 regex_must_compile() function. */
1555 pcre_malloc = function_store_get;
1556 pcre_free = function_dummy_free;
1558 /* Ensure there is a big buffer for temporary use in several places. It is put
1559 in malloc store so that it can be freed for enlargement if necessary. */
1561 big_buffer = store_malloc(big_buffer_size);
1563 /* Set up the handler for the data request signal, and set the initial
1564 descriptive text. */
1566 set_process_info("initializing");
1567 os_restarting_signal(SIGUSR1, usr1_handler);
1569 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1570 in the daemon code. For the rest of Exim's uses, we ignore it. */
1572 signal(SIGHUP, SIG_IGN);
1574 /* We don't want to die on pipe errors as the code is written to handle
1575 the write error instead. */
1577 signal(SIGPIPE, SIG_IGN);
1579 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1580 set to SIG_IGN. This causes subprocesses that complete before the parent
1581 process waits for them not to hang around, so when Exim calls wait(), nothing
1582 is there. The wait() code has been made robust against this, but let's ensure
1583 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1584 ending status. We use sigaction rather than plain signal() on those OS where
1585 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1586 problem on AIX with this.) */
1590 struct sigaction act;
1591 act.sa_handler = SIG_DFL;
1592 sigemptyset(&(act.sa_mask));
1594 sigaction(SIGCHLD, &act, NULL);
1597 signal(SIGCHLD, SIG_DFL);
1600 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1605 /* Set up the version number. Set up the leading 'E' for the external form of
1606 message ids, set the pointer to the internal form, and initialize it to
1607 indicate no message being processed. */
1610 message_id_option[0] = '-';
1611 message_id_external = message_id_option + 1;
1612 message_id_external[0] = 'E';
1613 message_id = message_id_external + 1;
1616 /* Set the umask to zero so that any files Exim creates using open() are
1617 created with the modes that it specifies. NOTE: Files created with fopen() have
1618 a problem, which was not recognized till rather late (February 2006). With this
1619 umask, such files will be world writeable. (They are all content scanning files
1620 in the spool directory, which isn't world-accessible, so this is not a
1621 disaster, but it's untidy.) I don't want to change this overall setting,
1622 however, because it will interact badly with the open() calls. Instead, there's
1623 now a function called modefopen() that fiddles with the umask while calling
1628 /* Precompile the regular expression for matching a message id. Keep this in
1629 step with the code that generates ids in the accept.c module. We need to do
1630 this here, because the -M options check their arguments for syntactic validity
1631 using mac_ismsgid, which uses this. */
1634 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1636 /* Precompile the regular expression that is used for matching an SMTP error
1637 code, possibly extended, at the start of an error message. Note that the
1638 terminating whitespace character is included. */
1641 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1644 #ifdef WHITELIST_D_MACROS
1645 /* Precompile the regular expression used to filter the content of macros
1646 given to -D for permissibility. */
1648 regex_whitelisted_macro =
1649 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1653 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1654 this seems to be a generally accepted convention, since one finds symbolic
1655 links called "mailq" in standard OS configurations. */
1657 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1658 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1661 receiving_message = FALSE;
1662 called_as = US"-mailq";
1665 /* If the program is called as "rmail" treat it as equivalent to
1666 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1667 i.e. preventing a single dot on a line from terminating the message, and
1668 returning with zero return code, even in cases of error (provided an error
1669 message has been sent). */
1671 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1672 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1675 called_as = US"-rmail";
1676 errors_sender_rc = EXIT_SUCCESS;
1679 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1680 this is a smail convention. */
1682 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1683 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1685 smtp_input = smtp_batched_input = TRUE;
1686 called_as = US"-rsmtp";
1689 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1690 this is a smail convention. */
1692 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1693 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1696 receiving_message = FALSE;
1697 called_as = US"-runq";
1700 /* If the program is called as "newaliases" treat it as equivalent to
1701 "exim -bi"; this is a sendmail convention. */
1703 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1704 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1707 receiving_message = FALSE;
1708 called_as = US"-newaliases";
1711 /* Save the original effective uid for a couple of uses later. It should
1712 normally be root, but in some esoteric environments it may not be. */
1714 original_euid = geteuid();
1716 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1717 to be the same as the real ones. This makes a difference only if Exim is setuid
1718 (or setgid) to something other than root, which could be the case in some
1719 special configurations. */
1721 real_uid = getuid();
1722 real_gid = getgid();
1724 if (real_uid == root_uid)
1726 rv = setgid(real_gid);
1729 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1730 (long int)real_gid, strerror(errno));
1733 rv = setuid(real_uid);
1736 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1737 (long int)real_uid, strerror(errno));
1742 /* If neither the original real uid nor the original euid was root, Exim is
1743 running in an unprivileged state. */
1745 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1747 /* Scan the program's arguments. Some can be dealt with right away; others are
1748 simply recorded for checking and handling afterwards. Do a high-level switch
1749 on the second character (the one after '-'), to save some effort. */
1751 for (i = 1; i < argc; i++)
1753 BOOL badarg = FALSE;
1754 uschar *arg = argv[i];
1758 /* An argument not starting with '-' is the start of a recipients list;
1759 break out of the options-scanning loop. */
1767 /* An option consistion of -- terminates the options */
1769 if (Ustrcmp(arg, "--") == 0)
1771 recipients_arg = i + 1;
1775 /* Handle flagged options */
1777 switchchar = arg[1];
1780 /* Make all -ex options synonymous with -oex arguments, since that
1781 is assumed by various callers. Also make -qR options synonymous with -R
1782 options, as that seems to be required as well. Allow for -qqR too, and
1783 the same for -S options. */
1785 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1786 Ustrncmp(arg+1, "qR", 2) == 0 ||
1787 Ustrncmp(arg+1, "qS", 2) == 0)
1789 switchchar = arg[2];
1792 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1794 switchchar = arg[3];
1796 queue_2stage = TRUE;
1799 /* Make -r synonymous with -f, since it is a documented alias */
1801 else if (arg[1] == 'r') switchchar = 'f';
1803 /* Make -ov synonymous with -v */
1805 else if (Ustrcmp(arg, "-ov") == 0)
1811 /* deal with --option_aliases */
1812 else if (switchchar == '-')
1814 if (Ustrcmp(argrest, "help") == 0)
1816 usage_wanted = TRUE;
1819 else if (Ustrcmp(argrest, "version") == 0)
1826 /* High-level switch on active initial letter */
1830 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1831 so has no need of it. */
1834 if (*argrest == 0) i++; /* Skip over the type */
1839 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1841 /* -bd: Run in daemon mode, awaiting SMTP connections.
1842 -bdf: Ditto, but in the foreground.
1845 if (*argrest == 'd')
1847 daemon_listen = TRUE;
1848 if (*(++argrest) == 'f') background_daemon = FALSE;
1849 else if (*argrest != 0) { badarg = TRUE; break; }
1852 /* -be: Run in expansion test mode
1853 -bem: Ditto, but read a message from a file first
1856 else if (*argrest == 'e')
1858 expansion_test = checking = TRUE;
1859 if (argrest[1] == 'm')
1861 if (++i >= argc) { badarg = TRUE; break; }
1862 expansion_test_message = argv[i];
1865 if (argrest[1] != 0) { badarg = TRUE; break; }
1868 /* -bF: Run system filter test */
1870 else if (*argrest == 'F')
1872 filter_test |= FTEST_SYSTEM;
1873 if (*(++argrest) != 0) { badarg = TRUE; break; }
1874 if (++i < argc) filter_test_sfile = argv[i]; else
1876 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1881 /* -bf: Run user filter test
1882 -bfd: Set domain for filter testing
1883 -bfl: Set local part for filter testing
1884 -bfp: Set prefix for filter testing
1885 -bfs: Set suffix for filter testing
1888 else if (*argrest == 'f')
1890 if (*(++argrest) == 0)
1892 filter_test |= FTEST_USER;
1893 if (++i < argc) filter_test_ufile = argv[i]; else
1895 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1903 fprintf(stderr, "exim: string expected after %s\n", arg);
1906 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1907 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1908 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1909 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1910 else { badarg = TRUE; break; }
1914 /* -bh: Host checking - an IP address must follow. */
1916 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1918 if (++i >= argc) { badarg = TRUE; break; }
1919 sender_host_address = argv[i];
1920 host_checking = checking = log_testing_mode = TRUE;
1921 host_checking_callout = argrest[1] == 'c';
1924 /* -bi: This option is used by sendmail to initialize *the* alias file,
1925 though it has the -oA option to specify a different file. Exim has no
1926 concept of *the* alias file, but since Sun's YP make script calls
1927 sendmail this way, some support must be provided. */
1929 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1931 /* -bm: Accept and deliver message - the default option. Reinstate
1932 receiving_message, which got turned off for all -b options. */
1934 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1936 /* -bmalware: test the filename given for malware */
1938 else if (Ustrcmp(argrest, "malware") == 0)
1940 if (++i >= argc) { badarg = TRUE; break; }
1941 malware_test_file = argv[i];
1944 /* -bnq: For locally originating messages, do not qualify unqualified
1945 addresses. In the envelope, this causes errors; in header lines they
1948 else if (Ustrcmp(argrest, "nq") == 0)
1950 allow_unqualified_sender = FALSE;
1951 allow_unqualified_recipient = FALSE;
1954 /* -bpxx: List the contents of the mail queue, in various forms. If
1955 the option is -bpc, just a queue count is needed. Otherwise, if the
1956 first letter after p is r, then order is random. */
1958 else if (*argrest == 'p')
1960 if (*(++argrest) == 'c')
1963 if (*(++argrest) != 0) badarg = TRUE;
1967 if (*argrest == 'r')
1969 list_queue_option = 8;
1972 else list_queue_option = 0;
1976 /* -bp: List the contents of the mail queue, top-level only */
1978 if (*argrest == 0) {}
1980 /* -bpu: List the contents of the mail queue, top-level undelivered */
1982 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1984 /* -bpa: List the contents of the mail queue, including all delivered */
1986 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1988 /* Unknown after -bp[r] */
1998 /* -bP: List the configuration variables given as the address list.
1999 Force -v, so configuration errors get displayed. */
2001 else if (Ustrcmp(argrest, "P") == 0)
2003 list_options = TRUE;
2004 debug_selector |= D_v;
2005 debug_file = stderr;
2008 /* -brt: Test retry configuration lookup */
2010 else if (Ustrcmp(argrest, "rt") == 0)
2012 test_retry_arg = i + 1;
2016 /* -brw: Test rewrite configuration */
2018 else if (Ustrcmp(argrest, "rw") == 0)
2020 test_rewrite_arg = i + 1;
2024 /* -bS: Read SMTP commands on standard input, but produce no replies -
2025 all errors are reported by sending messages. */
2027 else if (Ustrcmp(argrest, "S") == 0)
2028 smtp_input = smtp_batched_input = receiving_message = TRUE;
2030 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2031 on standard output. */
2033 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2035 /* -bt: address testing mode */
2037 else if (Ustrcmp(argrest, "t") == 0)
2038 address_test_mode = checking = log_testing_mode = TRUE;
2040 /* -bv: verify addresses */
2042 else if (Ustrcmp(argrest, "v") == 0)
2043 verify_address_mode = checking = log_testing_mode = TRUE;
2045 /* -bvs: verify sender addresses */
2047 else if (Ustrcmp(argrest, "vs") == 0)
2049 verify_address_mode = checking = log_testing_mode = TRUE;
2050 verify_as_sender = TRUE;
2053 /* -bV: Print version string and support details */
2055 else if (Ustrcmp(argrest, "V") == 0)
2057 printf("Exim version %s #%s built %s\n", version_string,
2058 version_cnumber, version_date);
2059 printf("%s\n", CS version_copyright);
2060 version_printed = TRUE;
2061 show_whats_supported(stdout);
2064 /* -bw: inetd wait mode, accept a listening socket as stdin */
2066 else if (*argrest == 'w')
2068 inetd_wait_mode = TRUE;
2069 background_daemon = FALSE;
2070 daemon_listen = TRUE;
2071 if (*(++argrest) != '\0')
2073 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2074 if (inetd_wait_timeout <= 0)
2076 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2086 /* -C: change configuration file list; ignore if it isn't really
2087 a change! Enforce a prefix check if required. */
2092 if(++i < argc) argrest = argv[i]; else
2093 { badarg = TRUE; break; }
2095 if (Ustrcmp(config_main_filelist, argrest) != 0)
2097 #ifdef ALT_CONFIG_PREFIX
2099 int len = Ustrlen(ALT_CONFIG_PREFIX);
2100 uschar *list = argrest;
2102 while((filename = string_nextinlist(&list, &sep, big_buffer,
2103 big_buffer_size)) != NULL)
2105 if ((Ustrlen(filename) < len ||
2106 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2107 Ustrstr(filename, "/../") != NULL) &&
2108 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2110 fprintf(stderr, "-C Permission denied\n");
2115 if (real_uid != root_uid)
2117 #ifdef TRUSTED_CONFIG_LIST
2119 if (real_uid != exim_uid
2120 #ifdef CONFIGURE_OWNER
2121 && real_uid != config_uid
2124 trusted_config = FALSE;
2127 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2130 struct stat statbuf;
2132 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2133 (statbuf.st_uid != root_uid /* owner not root */
2134 #ifdef CONFIGURE_OWNER
2135 && statbuf.st_uid != config_uid /* owner not the special one */
2138 (statbuf.st_gid != root_gid /* group not root */
2139 #ifdef CONFIGURE_GROUP
2140 && statbuf.st_gid != config_gid /* group not the special one */
2142 && (statbuf.st_mode & 020) != 0 /* group writeable */
2144 (statbuf.st_mode & 2) != 0) /* world writeable */
2146 trusted_config = FALSE;
2151 /* Well, the trust list at least is up to scratch... */
2152 void *reset_point = store_get(0);
2153 uschar *trusted_configs[32];
2157 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2159 uschar *start = big_buffer, *nl;
2160 while (*start && isspace(*start))
2164 nl = Ustrchr(start, '\n');
2167 trusted_configs[nr_configs++] = string_copy(start);
2168 if (nr_configs == 32)
2176 uschar *list = argrest;
2178 while (trusted_config && (filename = string_nextinlist(&list,
2179 &sep, big_buffer, big_buffer_size)) != NULL)
2181 for (i=0; i < nr_configs; i++)
2183 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2186 if (i == nr_configs)
2188 trusted_config = FALSE;
2192 store_reset(reset_point);
2196 /* No valid prefixes found in trust_list file. */
2197 trusted_config = FALSE;
2203 /* Could not open trust_list file. */
2204 trusted_config = FALSE;
2208 /* Not root; don't trust config */
2209 trusted_config = FALSE;
2213 config_main_filelist = argrest;
2214 config_changed = TRUE;
2219 /* -D: set up a macro definition */
2222 #ifdef DISABLE_D_OPTION
2223 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2228 macro_item *mlast = NULL;
2231 uschar *s = argrest;
2233 while (isspace(*s)) s++;
2235 if (*s < 'A' || *s > 'Z')
2237 fprintf(stderr, "exim: macro name set by -D must start with "
2238 "an upper case letter\n");
2242 while (isalnum(*s) || *s == '_')
2244 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2248 if (ptr == 0) { badarg = TRUE; break; }
2249 while (isspace(*s)) s++;
2252 if (*s++ != '=') { badarg = TRUE; break; }
2253 while (isspace(*s)) s++;
2256 for (m = macros; m != NULL; m = m->next)
2258 if (Ustrcmp(m->name, name) == 0)
2260 fprintf(stderr, "exim: duplicated -D in command line\n");
2266 m = store_get(sizeof(macro_item) + Ustrlen(name));
2268 m->command_line = TRUE;
2269 if (mlast == NULL) macros = m; else mlast->next = m;
2270 Ustrcpy(m->name, name);
2271 m->replacement = string_copy(s);
2273 if (clmacro_count >= MAX_CLMACROS)
2275 fprintf(stderr, "exim: too many -D options on command line\n");
2278 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2284 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2285 The latter is now a no-op, retained for compatibility only. If -dd is used,
2286 debugging subprocesses of the daemon is disabled. */
2289 if (Ustrcmp(argrest, "ropcr") == 0)
2291 /* drop_cr = TRUE; */
2294 /* Use an intermediate variable so that we don't set debugging while
2295 decoding the debugging bits. */
2299 unsigned int selector = D_default;
2302 if (*argrest == 'd')
2304 debug_daemon = TRUE;
2308 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2309 debug_options_count, US"debug", 0);
2310 debug_selector = selector;
2315 /* -E: This is a local error message. This option is not intended for
2316 external use at all, but is not restricted to trusted callers because it
2317 does no harm (just suppresses certain error messages) and if Exim is run
2318 not setuid root it won't always be trusted when it generates error
2319 messages using this option. If there is a message id following -E, point
2320 message_reference at it, for logging. */
2323 local_error_message = TRUE;
2324 if (mac_ismsgid(argrest)) message_reference = argrest;
2328 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2329 option, so it looks as if historically the -oex options are also callable
2330 without the leading -o. So we have to accept them. Before the switch,
2331 anything starting -oe has been converted to -e. Exim does not support all
2332 of the sendmail error options. */
2335 if (Ustrcmp(argrest, "e") == 0)
2337 arg_error_handling = ERRORS_SENDER;
2338 errors_sender_rc = EXIT_SUCCESS;
2340 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2341 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2342 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2343 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2348 /* -F: Set sender's full name, used instead of the gecos entry from
2349 the password file. Since users can usually alter their gecos entries,
2350 there's no security involved in using this instead. The data can follow
2351 the -F or be in the next argument. */
2356 if(++i < argc) argrest = argv[i]; else
2357 { badarg = TRUE; break; }
2359 originator_name = argrest;
2360 sender_name_forced = TRUE;
2364 /* -f: Set sender's address - this value is only actually used if Exim is
2365 run by a trusted user, or if untrusted_set_sender is set and matches the
2366 address, except that the null address can always be set by any user. The
2367 test for this happens later, when the value given here is ignored when not
2368 permitted. For an untrusted user, the actual sender is still put in Sender:
2369 if it doesn't match the From: header (unless no_local_from_check is set).
2370 The data can follow the -f or be in the next argument. The -r switch is an
2371 obsolete form of -f but since there appear to be programs out there that
2372 use anything that sendmail has ever supported, better accept it - the
2373 synonymizing is done before the switch above.
2375 At this stage, we must allow domain literal addresses, because we don't
2376 know what the setting of allow_domain_literals is yet. Ditto for trailing
2377 dots and strip_trailing_dot. */
2385 if (i+1 < argc) argrest = argv[++i]; else
2386 { badarg = TRUE; break; }
2390 sender_address = string_sprintf(""); /* Ensure writeable memory */
2394 uschar *temp = argrest + Ustrlen(argrest) - 1;
2395 while (temp >= argrest && isspace(*temp)) temp--;
2396 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2397 allow_domain_literals = TRUE;
2398 strip_trailing_dot = TRUE;
2399 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2400 &sender_address_domain, TRUE);
2401 allow_domain_literals = FALSE;
2402 strip_trailing_dot = FALSE;
2403 if (sender_address == NULL)
2405 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2406 return EXIT_FAILURE;
2409 sender_address_forced = TRUE;
2413 /* This is some Sendmail thing which can be ignored */
2418 /* -h: Set the hop count for an incoming message. Exim does not currently
2419 support this; it always computes it by counting the Received: headers.
2420 To put it in will require a change to the spool header file format. */
2425 if(++i < argc) argrest = argv[i]; else
2426 { badarg = TRUE; break; }
2428 if (!isdigit(*argrest)) badarg = TRUE;
2432 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2433 not to be documented for sendmail but mailx (at least) uses it) */
2436 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2441 receiving_message = FALSE;
2443 /* -MC: continue delivery of another message via an existing open
2444 file descriptor. This option is used for an internal call by the
2445 smtp transport when there is a pending message waiting to go to an
2446 address to which it has got a connection. Five subsequent arguments are
2447 required: transport name, host name, IP address, sequence number, and
2448 message_id. Transports may decline to create new processes if the sequence
2449 number gets too big. The channel is stdin. This (-MC) must be the last
2450 argument. There's a subsequent check that the real-uid is privileged.
2452 If we are running in the test harness. delay for a bit, to let the process
2453 that set this one up complete. This makes for repeatability of the logging,
2456 if (Ustrcmp(argrest, "C") == 0)
2458 union sockaddr_46 interface_sock;
2459 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2463 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2464 return EXIT_FAILURE;
2467 if (msg_action_arg >= 0)
2469 fprintf(stderr, "exim: incompatible arguments\n");
2470 return EXIT_FAILURE;
2473 continue_transport = argv[++i];
2474 continue_hostname = argv[++i];
2475 continue_host_address = argv[++i];
2476 continue_sequence = Uatoi(argv[++i]);
2477 msg_action = MSG_DELIVER;
2478 msg_action_arg = ++i;
2479 forced_delivery = TRUE;
2480 queue_run_pid = passed_qr_pid;
2481 queue_run_pipe = passed_qr_pipe;
2483 if (!mac_ismsgid(argv[i]))
2485 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2487 return EXIT_FAILURE;
2490 /* Set up $sending_ip_address and $sending_port */
2492 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2494 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2498 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2500 return EXIT_FAILURE;
2503 if (running_in_test_harness) millisleep(500);
2507 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2508 precedes -MC (see above). The flag indicates that the host to which
2509 Exim is connected has accepted an AUTH sequence. */
2511 else if (Ustrcmp(argrest, "CA") == 0)
2513 smtp_authenticated = TRUE;
2517 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2518 it preceded -MC (see above) */
2520 else if (Ustrcmp(argrest, "CP") == 0)
2522 smtp_use_pipelining = TRUE;
2526 /* -MCQ: pass on the pid of the queue-running process that started
2527 this chain of deliveries and the fd of its synchronizing pipe; this
2528 is useful only when it precedes -MC (see above) */
2530 else if (Ustrcmp(argrest, "CQ") == 0)
2532 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2534 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2539 /* -MCS: set the smtp_use_size flag; this is useful only when it
2540 precedes -MC (see above) */
2542 else if (Ustrcmp(argrest, "CS") == 0)
2544 smtp_use_size = TRUE;
2548 /* -MCT: set the tls_offered flag; this is useful only when it
2549 precedes -MC (see above). The flag indicates that the host to which
2550 Exim is connected has offered TLS support. */
2553 else if (Ustrcmp(argrest, "CT") == 0)
2560 /* -M[x]: various operations on the following list of message ids:
2561 -M deliver the messages, ignoring next retry times and thawing
2562 -Mc deliver the messages, checking next retry times, no thawing
2563 -Mf freeze the messages
2564 -Mg give up on the messages
2565 -Mt thaw the messages
2566 -Mrm remove the messages
2567 In the above cases, this must be the last option. There are also the
2568 following options which are followed by a single message id, and which
2569 act on that message. Some of them use the "recipient" addresses as well.
2570 -Mar add recipient(s)
2571 -Mmad mark all recipients delivered
2572 -Mmd mark recipients(s) delivered
2574 -Mset load a message for use with -be
2576 -Mvc show copy (of whole message, in RFC 2822 format)
2581 else if (*argrest == 0)
2583 msg_action = MSG_DELIVER;
2584 forced_delivery = deliver_force_thaw = TRUE;
2586 else if (Ustrcmp(argrest, "ar") == 0)
2588 msg_action = MSG_ADD_RECIPIENT;
2589 one_msg_action = TRUE;
2591 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2592 else if (Ustrcmp(argrest, "es") == 0)
2594 msg_action = MSG_EDIT_SENDER;
2595 one_msg_action = TRUE;
2597 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2598 else if (Ustrcmp(argrest, "g") == 0)
2600 msg_action = MSG_DELIVER;
2601 deliver_give_up = TRUE;
2603 else if (Ustrcmp(argrest, "mad") == 0)
2605 msg_action = MSG_MARK_ALL_DELIVERED;
2607 else if (Ustrcmp(argrest, "md") == 0)
2609 msg_action = MSG_MARK_DELIVERED;
2610 one_msg_action = TRUE;
2612 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2613 else if (Ustrcmp(argrest, "set") == 0)
2615 msg_action = MSG_LOAD;
2616 one_msg_action = TRUE;
2618 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2619 else if (Ustrcmp(argrest, "vb") == 0)
2621 msg_action = MSG_SHOW_BODY;
2622 one_msg_action = TRUE;
2624 else if (Ustrcmp(argrest, "vc") == 0)
2626 msg_action = MSG_SHOW_COPY;
2627 one_msg_action = TRUE;
2629 else if (Ustrcmp(argrest, "vh") == 0)
2631 msg_action = MSG_SHOW_HEADER;
2632 one_msg_action = TRUE;
2634 else if (Ustrcmp(argrest, "vl") == 0)
2636 msg_action = MSG_SHOW_LOG;
2637 one_msg_action = TRUE;
2639 else { badarg = TRUE; break; }
2641 /* All the -Mxx options require at least one message id. */
2643 msg_action_arg = i + 1;
2644 if (msg_action_arg >= argc)
2646 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2647 return EXIT_FAILURE;
2650 /* Some require only message ids to follow */
2652 if (!one_msg_action)
2655 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2657 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2659 return EXIT_FAILURE;
2661 goto END_ARG; /* Remaining args are ids */
2664 /* Others require only one message id, possibly followed by addresses,
2665 which will be handled as normal arguments. */
2669 if (!mac_ismsgid(argv[msg_action_arg]))
2671 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2672 argv[msg_action_arg], arg);
2673 return EXIT_FAILURE;
2680 /* Some programs seem to call the -om option without the leading o;
2681 for sendmail it askes for "me too". Exim always does this. */
2684 if (*argrest != 0) badarg = TRUE;
2688 /* -N: don't do delivery - a debugging option that stops transports doing
2689 their thing. It implies debugging at the D_v level. */
2694 dont_deliver = TRUE;
2695 debug_selector |= D_v;
2696 debug_file = stderr;
2702 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2708 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2709 option to the specified value. This form uses long names. We need to handle
2710 -O option=value and -Ooption=value. */
2717 fprintf(stderr, "exim: string expected after -O\n");
2725 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2728 if (*argrest == 'A')
2730 alias_arg = argrest + 1;
2731 if (alias_arg[0] == 0)
2733 if (i+1 < argc) alias_arg = argv[++i]; else
2735 fprintf(stderr, "exim: string expected after -oA\n");
2741 /* -oB: Set a connection message max value for remote deliveries */
2743 else if (*argrest == 'B')
2745 uschar *p = argrest + 1;
2748 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2750 connection_max_messages = 1;
2759 fprintf(stderr, "exim: number expected after -oB\n");
2762 connection_max_messages = Uatoi(p);
2766 /* -odb: background delivery */
2768 else if (Ustrcmp(argrest, "db") == 0)
2770 synchronous_delivery = FALSE;
2771 arg_queue_only = FALSE;
2772 queue_only_set = TRUE;
2775 /* -odf: foreground delivery (smail-compatible option); same effect as
2776 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2779 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2781 synchronous_delivery = TRUE;
2782 arg_queue_only = FALSE;
2783 queue_only_set = TRUE;
2786 /* -odq: queue only */
2788 else if (Ustrcmp(argrest, "dq") == 0)
2790 synchronous_delivery = FALSE;
2791 arg_queue_only = TRUE;
2792 queue_only_set = TRUE;
2795 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2796 but no remote delivery */
2798 else if (Ustrcmp(argrest, "dqs") == 0)
2801 arg_queue_only = FALSE;
2802 queue_only_set = TRUE;
2805 /* -oex: Sendmail error flags. As these are also accepted without the
2806 leading -o prefix, for compatibility with vacation and other callers,
2807 they are handled with -e above. */
2809 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2810 -oitrue: Another sendmail syntax for the same */
2812 else if (Ustrcmp(argrest, "i") == 0 ||
2813 Ustrcmp(argrest, "itrue") == 0)
2816 /* -oM*: Set various characteristics for an incoming message; actually
2817 acted on for trusted callers only. */
2819 else if (*argrest == 'M')
2823 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2827 /* -oMa: Set sender host address */
2829 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2831 /* -oMaa: Set authenticator name */
2833 else if (Ustrcmp(argrest, "Maa") == 0)
2834 sender_host_authenticated = argv[++i];
2836 /* -oMas: setting authenticated sender */
2838 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2840 /* -oMai: setting authenticated id */
2842 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2844 /* -oMi: Set incoming interface address */
2846 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2848 /* -oMr: Received protocol */
2850 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2852 /* -oMs: Set sender host name */
2854 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2856 /* -oMt: Set sender ident */
2858 else if (Ustrcmp(argrest, "Mt") == 0)
2860 sender_ident_set = TRUE;
2861 sender_ident = argv[++i];
2864 /* Else a bad argument */
2873 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2874 seem to call this as -m (undocumented), so that is also accepted (see
2877 else if (Ustrcmp(argrest, "m") == 0) {}
2879 /* -oo: An ancient flag for old-style addresses which still seems to
2880 crop up in some calls (see in SCO). */
2882 else if (Ustrcmp(argrest, "o") == 0) {}
2884 /* -oP <name>: set pid file path for daemon */
2886 else if (Ustrcmp(argrest, "P") == 0)
2887 override_pid_file_path = argv[++i];
2889 /* -or <n>: set timeout for non-SMTP acceptance
2890 -os <n>: set timeout for SMTP acceptance */
2892 else if (*argrest == 'r' || *argrest == 's')
2894 int *tp = (*argrest == 'r')?
2895 &arg_receive_timeout : &arg_smtp_receive_timeout;
2896 if (argrest[1] == 0)
2898 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2900 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2903 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2908 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2910 else if (Ustrcmp(argrest, "X") == 0)
2911 override_local_interfaces = argv[++i];
2913 /* Unknown -o argument */
2919 /* -ps: force Perl startup; -pd force delayed Perl startup */
2923 if (*argrest == 's' && argrest[1] == 0)
2925 perl_start_option = 1;
2928 if (*argrest == 'd' && argrest[1] == 0)
2930 perl_start_option = -1;
2935 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2936 which sets the host protocol and host name */
2940 if (i+1 < argc) argrest = argv[++i]; else
2941 { badarg = TRUE; break; }
2946 uschar *hn = Ustrchr(argrest, ':');
2949 received_protocol = argrest;
2953 received_protocol = string_copyn(argrest, hn - argrest);
2954 sender_host_name = hn + 1;
2961 receiving_message = FALSE;
2962 if (queue_interval >= 0)
2964 fprintf(stderr, "exim: -q specified more than once\n");
2968 /* -qq...: Do queue runs in a 2-stage manner */
2970 if (*argrest == 'q')
2972 queue_2stage = TRUE;
2976 /* -qi...: Do only first (initial) deliveries */
2978 if (*argrest == 'i')
2980 queue_run_first_delivery = TRUE;
2984 /* -qf...: Run the queue, forcing deliveries
2985 -qff..: Ditto, forcing thawing as well */
2987 if (*argrest == 'f')
2989 queue_run_force = TRUE;
2990 if (*(++argrest) == 'f')
2992 deliver_force_thaw = TRUE;
2997 /* -q[f][f]l...: Run the queue only on local deliveries */
2999 if (*argrest == 'l')
3001 queue_run_local = TRUE;
3005 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3006 optionally starting from a given message id. */
3008 if (*argrest == 0 &&
3009 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3012 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3013 start_queue_run_id = argv[++i];
3014 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3015 stop_queue_run_id = argv[++i];
3018 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3019 optionally local only. */
3024 queue_interval = readconf_readtime(argrest, 0, FALSE);
3026 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3027 if (queue_interval <= 0)
3029 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3036 case 'R': /* Synonymous with -qR... */
3037 receiving_message = FALSE;
3039 /* -Rf: As -R (below) but force all deliveries,
3040 -Rff: Ditto, but also thaw all frozen messages,
3041 -Rr: String is regex
3042 -Rrf: Regex and force
3043 -Rrff: Regex and force and thaw
3045 in all cases provided there are no further characters in this
3051 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3053 if (Ustrcmp(argrest, rsopts[i]) == 0)
3055 if (i != 2) queue_run_force = TRUE;
3056 if (i >= 2) deliver_selectstring_regex = TRUE;
3057 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3058 argrest += Ustrlen(rsopts[i]);
3063 /* -R: Set string to match in addresses for forced queue run to
3064 pick out particular messages. */
3068 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3070 fprintf(stderr, "exim: string expected after -R\n");
3074 else deliver_selectstring = argrest;
3078 /* -r: an obsolete synonym for -f (see above) */
3081 /* -S: Like -R but works on sender. */
3083 case 'S': /* Synonymous with -qS... */
3084 receiving_message = FALSE;
3086 /* -Sf: As -S (below) but force all deliveries,
3087 -Sff: Ditto, but also thaw all frozen messages,
3088 -Sr: String is regex
3089 -Srf: Regex and force
3090 -Srff: Regex and force and thaw
3092 in all cases provided there are no further characters in this
3098 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3100 if (Ustrcmp(argrest, rsopts[i]) == 0)
3102 if (i != 2) queue_run_force = TRUE;
3103 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3104 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3105 argrest += Ustrlen(rsopts[i]);
3110 /* -S: Set string to match in addresses for forced queue run to
3111 pick out particular messages. */
3115 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3117 fprintf(stderr, "exim: string expected after -S\n");
3121 else deliver_selectstring_sender = argrest;
3124 /* -Tqt is an option that is exclusively for use by the testing suite.
3125 It is not recognized in other circumstances. It allows for the setting up
3126 of explicit "queue times" so that various warning/retry things can be
3127 tested. Otherwise variability of clock ticks etc. cause problems. */
3130 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3131 fudged_queue_times = argv[++i];
3136 /* -t: Set flag to extract recipients from body of message. */
3139 if (*argrest == 0) extract_recipients = TRUE;
3141 /* -ti: Set flag to extract recipients from body of message, and also
3142 specify that dot does not end the message. */
3144 else if (Ustrcmp(argrest, "i") == 0)
3146 extract_recipients = TRUE;
3150 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3153 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
3160 /* -U: This means "initial user submission" in sendmail, apparently. The
3161 doc claims that in future sendmail may refuse syntactically invalid
3162 messages instead of fixing them. For the moment, we just ignore it. */
3168 /* -v: verify things - this is a very low-level debugging */
3173 debug_selector |= D_v;
3174 debug_file = stderr;
3180 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3182 The -x flag tells the sendmail command that mail from a local
3183 mail program has National Language Support (NLS) extended characters
3184 in the body of the mail item. The sendmail command can send mail with
3185 extended NLS characters across networks that normally corrupts these
3188 As Exim is 8-bit clean, it just ignores this flag. */
3191 if (*argrest != 0) badarg = TRUE;
3194 /* All other initial characters are errors */
3199 } /* End of high-level switch statement */
3201 /* Failed to recognize the option, or syntax error */
3205 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3206 "option %s\n", arg);
3212 /* If -R or -S have been specified without -q, assume a single queue run. */
3214 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3215 queue_interval < 0) queue_interval = 0;
3219 /* If usage_wanted is set we call the usage function - which never returns */
3220 if (usage_wanted) exim_usage(called_as);
3222 /* Arguments have been processed. Check for incompatibilities. */
3224 (smtp_input || extract_recipients || recipients_arg < argc) &&
3225 (daemon_listen || queue_interval >= 0 || bi_option ||
3226 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3227 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3230 msg_action_arg > 0 &&
3231 (daemon_listen || queue_interval >= 0 || list_options ||
3232 (checking && msg_action != MSG_LOAD) ||
3233 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3236 (daemon_listen || queue_interval >= 0) &&
3237 (sender_address != NULL || list_options || list_queue || checking ||
3241 daemon_listen && queue_interval == 0
3244 inetd_wait_mode && queue_interval >= 0
3248 (checking || smtp_input || extract_recipients ||
3249 filter_test != FTEST_NONE || bi_option)
3252 verify_address_mode &&
3253 (address_test_mode || smtp_input || extract_recipients ||
3254 filter_test != FTEST_NONE || bi_option)
3257 address_test_mode && (smtp_input || extract_recipients ||
3258 filter_test != FTEST_NONE || bi_option)
3261 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3265 deliver_selectstring != NULL && queue_interval < 0
3268 msg_action == MSG_LOAD &&
3269 (!expansion_test || expansion_test_message != NULL)
3273 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3277 /* If debugging is set up, set the file and the file descriptor to pass on to
3278 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3279 to run in the foreground. */
3281 if (debug_selector != 0)
3283 debug_file = stderr;
3284 debug_fd = fileno(debug_file);
3285 background_daemon = FALSE;
3286 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3287 if (debug_selector != D_v) /* -v only doesn't show this */
3289 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3290 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3292 if (!version_printed)
3293 show_whats_supported(stderr);
3297 /* When started with root privilege, ensure that the limits on the number of
3298 open files and the number of processes (where that is accessible) are
3299 sufficiently large, or are unset, in case Exim has been called from an
3300 environment where the limits are screwed down. Not all OS have the ability to
3301 change some of these limits. */
3305 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3311 #ifdef RLIMIT_NOFILE
3312 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3314 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3316 rlp.rlim_cur = rlp.rlim_max = 0;
3319 /* I originally chose 1000 as a nice big number that was unlikely to
3320 be exceeded. It turns out that some older OS have a fixed upper limit of
3323 if (rlp.rlim_cur < 1000)
3325 rlp.rlim_cur = rlp.rlim_max = 1000;
3326 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3328 rlp.rlim_cur = rlp.rlim_max = 256;
3329 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3330 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3337 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3339 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3341 rlp.rlim_cur = rlp.rlim_max = 0;
3344 #ifdef RLIM_INFINITY
3345 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3347 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3349 if (rlp.rlim_cur < 1000)
3351 rlp.rlim_cur = rlp.rlim_max = 1000;
3353 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3354 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3360 /* Exim is normally entered as root (but some special configurations are
3361 possible that don't do this). However, it always spins off sub-processes that
3362 set their uid and gid as required for local delivery. We don't want to pass on
3363 any extra groups that root may belong to, so we want to get rid of them all at
3366 We need to obey setgroups() at this stage, before possibly giving up root
3367 privilege for a changed configuration file, but later on we might need to
3368 check on the additional groups for the admin user privilege - can't do that
3369 till after reading the config, which might specify the exim gid. Therefore,
3370 save the group list here first. */
3372 group_count = getgroups(NGROUPS_MAX, group_list);
3373 if (group_count < 0)
3375 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3379 /* There is a fundamental difference in some BSD systems in the matter of
3380 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3381 known not to be different. On the "different" systems there is a single group
3382 list, and the first entry in it is the current group. On all other versions of
3383 Unix there is a supplementary group list, which is in *addition* to the current
3384 group. Consequently, to get rid of all extraneous groups on a "standard" system
3385 you pass over 0 groups to setgroups(), while on a "different" system you pass
3386 over a single group - the current group, which is always the first group in the
3387 list. Calling setgroups() with zero groups on a "different" system results in
3388 an error return. The following code should cope with both types of system.
3390 However, if this process isn't running as root, setgroups() can't be used
3391 since you have to be root to run it, even if throwing away groups. Not being
3392 root here happens only in some unusual configurations. We just ignore the
3395 if (setgroups(0, NULL) != 0)
3397 if (setgroups(1, group_list) != 0 && !unprivileged)
3399 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3404 /* If the configuration file name has been altered by an argument on the
3405 command line (either a new file name or a macro definition) and the caller is
3406 not root, or if this is a filter testing run, remove any setuid privilege the
3407 program has and run as the underlying user.
3409 The exim user is locked out of this, which severely restricts the use of -C
3412 Otherwise, set the real ids to the effective values (should be root unless run
3413 from inetd, which it can either be root or the exim uid, if one is configured).
3415 There is a private mechanism for bypassing some of this, in order to make it
3416 possible to test lots of configurations automatically, without having either to
3417 recompile each time, or to patch in an actual configuration file name and other
3418 values (such as the path name). If running in the test harness, pretend that
3419 configuration file changes and macro definitions haven't happened. */
3422 (!trusted_config || /* Config changed, or */
3423 !macros_trusted()) && /* impermissible macros and */
3424 real_uid != root_uid && /* Not root, and */
3425 !running_in_test_harness /* Not fudged */
3427 expansion_test /* expansion testing */
3429 filter_test != FTEST_NONE) /* Filter testing */
3431 setgroups(group_count, group_list);
3432 exim_setugid(real_uid, real_gid, FALSE,
3433 US"-C, -D, -be or -bf forces real uid");
3434 removed_privilege = TRUE;
3436 /* In the normal case when Exim is called like this, stderr is available
3437 and should be used for any logging information because attempts to write
3438 to the log will usually fail. To arrange this, we unset really_exim. However,
3439 if no stderr is available there is no point - we might as well have a go
3440 at the log (if it fails, syslog will be written).
3442 Note that if the invoker is Exim, the logs remain available. Messing with
3443 this causes unlogged successful deliveries. */
3445 if ((log_stderr != NULL) && (real_uid != exim_uid))
3446 really_exim = FALSE;
3449 /* Privilege is to be retained for the moment. It may be dropped later,
3450 depending on the job that this Exim process has been asked to do. For now, set
3451 the real uid to the effective so that subsequent re-execs of Exim are done by a
3454 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3456 /* If testing a filter, open the file(s) now, before wasting time doing other
3457 setups and reading the message. */
3459 if ((filter_test & FTEST_SYSTEM) != 0)
3461 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3464 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3466 return EXIT_FAILURE;
3470 if ((filter_test & FTEST_USER) != 0)
3472 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3475 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3477 return EXIT_FAILURE;
3481 /* Initialise lookup_list
3482 If debugging, already called above via version reporting.
3483 In either case, we initialise the list of available lookups while running
3484 as root. All dynamically modules are loaded from a directory which is
3485 hard-coded into the binary and is code which, if not a module, would be
3486 part of Exim already. Ability to modify the content of the directory
3487 is equivalent to the ability to modify a setuid binary!
3489 This needs to happen before we read the main configuration. */
3492 /* Read the main runtime configuration data; this gives up if there
3493 is a failure. It leaves the configuration file open so that the subsequent
3494 configuration data for delivery can be read if needed. */
3498 /* Handle the decoding of logging options. */
3500 decode_bits(&log_write_selector, &log_extra_selector, 0, 0,
3501 log_selector_string, log_options, log_options_count, US"log", 0);
3505 debug_printf("configuration file is %s\n", config_main_filename);
3506 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3507 log_extra_selector);
3510 /* If domain literals are not allowed, check the sender address that was
3511 supplied with -f. Ditto for a stripped trailing dot. */
3513 if (sender_address != NULL)
3515 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3517 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3518 "allowed\n", sender_address);
3519 return EXIT_FAILURE;
3521 if (f_end_dot && !strip_trailing_dot)
3523 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3524 "(trailing dot not allowed)\n", sender_address);
3525 return EXIT_FAILURE;
3529 /* Paranoia check of maximum lengths of certain strings. There is a check
3530 on the length of the log file path in log.c, which will come into effect
3531 if there are any calls to write the log earlier than this. However, if we
3532 get this far but the string is very long, it is better to stop now than to
3533 carry on and (e.g.) receive a message and then have to collapse. The call to
3534 log_write() from here will cause the ultimate panic collapse if the complete
3535 file name exceeds the buffer length. */
3537 if (Ustrlen(log_file_path) > 200)
3538 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3539 "log_file_path is longer than 200 chars: aborting");
3541 if (Ustrlen(pid_file_path) > 200)
3542 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3543 "pid_file_path is longer than 200 chars: aborting");
3545 if (Ustrlen(spool_directory) > 200)
3546 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3547 "spool_directory is longer than 200 chars: aborting");
3549 /* Length check on the process name given to syslog for its TAG field,
3550 which is only permitted to be 32 characters or less. See RFC 3164. */
3552 if (Ustrlen(syslog_processname) > 32)
3553 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3554 "syslog_processname is longer than 32 chars: aborting");
3556 /* In some operating systems, the environment variable TMPDIR controls where
3557 temporary files are created; Exim doesn't use these (apart from when delivering
3558 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3559 If TMPDIR is found in the environment, reset it to the value defined in the
3560 TMPDIR macro, if this macro is defined. */
3565 for (p = USS environ; *p != NULL; p++)
3567 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3568 Ustrcmp(*p+7, TMPDIR) != 0)
3570 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3571 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3573 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3579 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3580 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3581 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3582 called by a user who has set the TZ variable. This then affects the timestamps
3583 in log files and in Received: headers, and any created Date: header lines. The
3584 required timezone is settable in the configuration file, so nothing can be done
3585 about this earlier - but hopefully nothing will normally be logged earlier than
3586 this. We have to make a new environment if TZ is wrong, but don't bother if
3587 timestamps_utc is set, because then all times are in UTC anyway. */
3589 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3591 timestamps_utc = TRUE;
3595 uschar *envtz = US getenv("TZ");
3596 if ((envtz == NULL && timezone_string != NULL) ||
3598 (timezone_string == NULL ||
3599 Ustrcmp(timezone_string, envtz) != 0)))
3601 uschar **p = USS environ;
3605 while (*p++ != NULL) count++;
3606 if (envtz == NULL) count++;
3607 newp = new = malloc(sizeof(uschar *) * (count + 1));
3608 for (p = USS environ; *p != NULL; p++)
3610 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3613 if (timezone_string != NULL)
3615 *newp = malloc(Ustrlen(timezone_string) + 4);
3616 sprintf(CS *newp++, "TZ=%s", timezone_string);
3621 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3622 tod_stamp(tod_log));
3626 /* Handle the case when we have removed the setuid privilege because of -C or
3627 -D. This means that the caller of Exim was not root.
3629 There is a problem if we were running as the Exim user. The sysadmin may
3630 expect this case to retain privilege because "the binary was called by the
3631 Exim user", but it hasn't, because either the -D option set macros, or the
3632 -C option set a non-trusted configuration file. There are two possibilities:
3634 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3635 to do message deliveries. Thus, the fact that it is running as a
3636 non-privileged user is plausible, and might be wanted in some special
3637 configurations. However, really_exim will have been set false when
3638 privilege was dropped, to stop Exim trying to write to its normal log
3639 files. Therefore, re-enable normal log processing, assuming the sysadmin
3640 has set up the log directory correctly.
3642 (2) If deliver_drop_privilege is not set, the configuration won't work as
3643 apparently intended, and so we log a panic message. In order to retain
3644 root for -C or -D, the caller must either be root or be invoking a
3645 trusted configuration file (when deliver_drop_privilege is false). */
3647 if (removed_privilege && (!trusted_config || macros != NULL) &&
3648 real_uid == exim_uid)
3650 if (deliver_drop_privilege)
3651 really_exim = TRUE; /* let logging work normally */
3653 log_write(0, LOG_MAIN|LOG_PANIC,
3654 "exim user lost privilege for using %s option",
3655 trusted_config? "-D" : "-C");
3658 /* Start up Perl interpreter if Perl support is configured and there is a
3659 perl_startup option, and the configuration or the command line specifies
3660 initializing starting. Note that the global variables are actually called
3661 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3664 if (perl_start_option != 0)
3665 opt_perl_at_start = (perl_start_option > 0);
3666 if (opt_perl_at_start && opt_perl_startup != NULL)
3669 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3670 errstr = init_perl(opt_perl_startup);
3673 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3674 return EXIT_FAILURE;
3676 opt_perl_started = TRUE;
3678 #endif /* EXIM_PERL */
3680 /* Log the arguments of the call if the configuration file said so. This is
3681 a debugging feature for finding out what arguments certain MUAs actually use.
3682 Don't attempt it if logging is disabled, or if listing variables or if
3683 verifying/testing addresses or expansions. */
3685 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3686 && really_exim && !list_options && !checking)
3689 uschar *p = big_buffer;
3691 (void)getcwd(CS p+4, big_buffer_size - 4);
3693 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3695 for (i = 0; i < argc; i++)
3697 int len = Ustrlen(argv[i]);
3700 if (p + len + 8 >= big_buffer + big_buffer_size)
3703 log_write(0, LOG_MAIN, "%s", big_buffer);
3704 Ustrcpy(big_buffer, "...");
3707 printing = string_printing(argv[i]);
3708 if (printing[0] == 0) quote = US"\""; else
3710 uschar *pp = printing;
3712 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3714 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3715 (p - big_buffer) - 4), printing, quote);
3719 if ((log_extra_selector & LX_arguments) != 0)
3720 log_write(0, LOG_MAIN, "%s", big_buffer);
3722 debug_printf("%s\n", big_buffer);
3725 /* Set the working directory to be the top-level spool directory. We don't rely
3726 on this in the code, which always uses fully qualified names, but it's useful
3727 for core dumps etc. Don't complain if it fails - the spool directory might not
3728 be generally accessible and calls with the -C option (and others) have lost
3729 privilege by now. Before the chdir, we try to ensure that the directory exists.
3732 if (Uchdir(spool_directory) != 0)
3734 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3735 (void)Uchdir(spool_directory);
3738 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3739 alias file. Exim doesn't have such a concept, but this call is screwed into
3740 Sun's YP makefiles. Handle this by calling a configured script, as the real
3741 user who called Exim. The -oA option can be used to pass an argument to the
3746 (void)fclose(config_file);
3747 if (bi_command != NULL)
3751 argv[i++] = bi_command;
3752 if (alias_arg != NULL) argv[i++] = alias_arg;
3755 setgroups(group_count, group_list);
3756 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3758 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3759 (argv[1] == NULL)? US"" : argv[1]);
3761 execv(CS argv[0], (char *const *)argv);
3762 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3767 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3772 /* If an action on specific messages is requested, or if a daemon or queue
3773 runner is being started, we need to know if Exim was called by an admin user.
3774 This is the case if the real user is root or exim, or if the real group is
3775 exim, or if one of the supplementary groups is exim or a group listed in
3776 admin_groups. We don't fail all message actions immediately if not admin_user,
3777 since some actions can be performed by non-admin users. Instead, set admin_user
3778 for later interrogation. */
3780 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3785 for (i = 0; i < group_count; i++)
3787 if (group_list[i] == exim_gid) admin_user = TRUE;
3788 else if (admin_groups != NULL)
3790 for (j = 1; j <= (int)(admin_groups[0]); j++)
3791 if (admin_groups[j] == group_list[i])
3792 { admin_user = TRUE; break; }
3794 if (admin_user) break;
3798 /* Another group of privileged users are the trusted users. These are root,
3799 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3800 are permitted to specify sender_addresses with -f on the command line, and
3801 other message parameters as well. */
3803 if (real_uid == root_uid || real_uid == exim_uid)
3804 trusted_caller = TRUE;
3809 if (trusted_users != NULL)
3811 for (i = 1; i <= (int)(trusted_users[0]); i++)
3812 if (trusted_users[i] == real_uid)
3813 { trusted_caller = TRUE; break; }
3816 if (!trusted_caller && trusted_groups != NULL)
3818 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3820 if (trusted_groups[i] == real_gid)
3821 trusted_caller = TRUE;
3822 else for (j = 0; j < group_count; j++)
3824 if (trusted_groups[i] == group_list[j])
3825 { trusted_caller = TRUE; break; }
3827 if (trusted_caller) break;
3832 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3833 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3835 /* Only an admin user may start the daemon or force a queue run in the default
3836 configuration, but the queue run restriction can be relaxed. Only an admin
3837 user may request that a message be returned to its sender forthwith. Only an
3838 admin user may specify a debug level greater than D_v (because it might show
3839 passwords, etc. in lookup queries). Only an admin user may request a queue
3840 count. Only an admin user can use the test interface to scan for email
3841 (because Exim will be in the spool dir and able to look at mails). */
3845 BOOL debugset = (debug_selector & ~D_v) != 0;
3846 if (deliver_give_up || daemon_listen || malware_test_file ||
3847 (count_queue && queue_list_requires_admin) ||
3848 (list_queue && queue_list_requires_admin) ||
3849 (queue_interval >= 0 && prod_requires_admin) ||
3850 (debugset && !running_in_test_harness))
3852 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3857 /* If the real user is not root or the exim uid, the argument for passing
3858 in an open TCP/IP connection for another message is not permitted, nor is
3859 running with the -N option for any delivery action, unless this call to exim is
3860 one that supplied an input message, or we are using a patched exim for
3861 regression testing. */
3863 if (real_uid != root_uid && real_uid != exim_uid &&
3864 (continue_hostname != NULL ||
3866 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3867 )) && !running_in_test_harness)
3869 fprintf(stderr, "exim: Permission denied\n");
3870 return EXIT_FAILURE;
3873 /* If the caller is not trusted, certain arguments are ignored when running for
3874 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3875 Note that authority for performing certain actions on messages is tested in the
3876 queue_action() function. */
3878 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3880 sender_host_name = sender_host_address = interface_address =
3881 sender_ident = received_protocol = NULL;
3882 sender_host_port = interface_port = 0;
3883 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3886 /* If a sender host address is set, extract the optional port number off the
3887 end of it and check its syntax. Do the same thing for the interface address.
3888 Exim exits if the syntax is bad. */
3892 if (sender_host_address != NULL)
3893 sender_host_port = check_port(sender_host_address);
3894 if (interface_address != NULL)
3895 interface_port = check_port(interface_address);
3898 /* If an SMTP message is being received check to see if the standard input is a
3899 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3900 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3905 union sockaddr_46 inetd_sock;
3906 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3907 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3909 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3910 if (family == AF_INET || family == AF_INET6)
3912 union sockaddr_46 interface_sock;
3913 size = sizeof(interface_sock);
3915 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3916 interface_address = host_ntoa(-1, &interface_sock, NULL,
3919 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3921 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3924 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3925 NULL, &sender_host_port);
3926 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3927 "inetd is not supported when mua_wrapper is set");
3932 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3933 return EXIT_FAILURE;
3939 /* If the load average is going to be needed while receiving a message, get it
3940 now for those OS that require the first call to os_getloadavg() to be done as
3941 root. There will be further calls later for each message received. */
3943 #ifdef LOAD_AVG_NEEDS_ROOT
3944 if (receiving_message &&
3945 (queue_only_load >= 0 ||
3946 (is_inetd && smtp_load_reserve >= 0)
3949 load_average = OS_GETLOADAVG();
3953 /* The queue_only configuration option can be overridden by -odx on the command
3954 line, except that if queue_only_override is false, queue_only cannot be unset
3955 from the command line. */
3957 if (queue_only_set && (queue_only_override || arg_queue_only))
3958 queue_only = arg_queue_only;
3960 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3963 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3964 if (arg_smtp_receive_timeout >= 0)
3965 smtp_receive_timeout = arg_smtp_receive_timeout;
3967 /* If Exim was started with root privilege, unless we have already removed the
3968 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3969 except when starting the daemon or doing some kind of delivery or address
3970 testing (-bt). These are the only cases when root need to be retained. We run
3971 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3972 retained only for starting the daemon. We always do the initgroups() in this
3973 situation (controlled by the TRUE below), in order to be as close as possible
3974 to the state Exim usually runs in. */
3976 if (!unprivileged && /* originally had root AND */
3977 !removed_privilege && /* still got root AND */
3978 !daemon_listen && /* not starting the daemon */
3979 queue_interval <= 0 && /* (either kind of daemon) */
3981 deliver_drop_privilege || /* requested unprivileged */
3983 queue_interval < 0 && /* not running the queue */
3984 (msg_action_arg < 0 || /* and */
3985 msg_action != MSG_DELIVER) && /* not delivering and */
3986 (!checking || !address_test_mode) /* not address checking */
3990 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3993 /* When we are retaining a privileged uid, we still change to the exim gid. */
3998 rv = setgid(exim_gid);
3999 /* Impact of failure is that some stuff might end up with an incorrect group.
4000 We track this for failures from root, since any attempt to change privilege
4001 by root should succeed and failures should be examined. For non-root,
4002 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4003 no need to complain then. */
4006 if (!(unprivileged || removed_privilege))
4009 "exim: changing group failed: %s\n", strerror(errno));
4013 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4014 (long int)exim_gid, strerror(errno));
4018 /* Handle a request to scan a file for malware */
4019 if (malware_test_file)
4021 #ifdef WITH_CONTENT_SCAN
4023 set_process_info("scanning file for malware");
4024 result = malware_in_file(malware_test_file);
4027 printf("No malware found.\n");
4032 printf("Malware lookup returned non-okay/fail: %d\n", result);
4036 printf("Malware found: %s\n", malware_name);
4038 printf("Malware scan detected malware of unknown name.\n");
4040 printf("Malware scanning not enabled at compile time.\n");
4045 /* Handle a request to list the delivery queue */
4049 set_process_info("listing the queue");
4050 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4054 /* Handle a request to count the delivery queue */
4058 set_process_info("counting the queue");
4063 /* Handle actions on specific messages, except for the force delivery and
4064 message load actions, which are done below. Some actions take a whole list of
4065 message ids, which are known to continue up to the end of the arguments. Others
4066 take a single message id and then operate on the recipients list. */
4068 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4070 int yield = EXIT_SUCCESS;
4071 set_process_info("acting on specified messages");
4073 if (!one_msg_action)
4075 for (i = msg_action_arg; i < argc; i++)
4076 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4077 yield = EXIT_FAILURE;
4080 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4081 recipients_arg)) yield = EXIT_FAILURE;
4085 /* All the modes below here require the remaining configuration sections
4086 to be read, except that we can skip over the ACL setting when delivering
4087 specific messages, or doing a queue run. (For various testing cases we could
4088 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
4091 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
4093 /* The configuration data will have been read into POOL_PERM because we won't
4094 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4095 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4096 configuration were read into POOL_MAIN, because we don't do any resets till
4097 later on. However, it seems right, and it does ensure that both pools get used.
4100 store_pool = POOL_MAIN;
4102 /* Handle the -brt option. This is for checking out retry configurations.
4103 The next three arguments are a domain name or a complete address, and
4104 optionally two error numbers. All it does is to call the function that
4105 scans the retry configuration data. */
4107 if (test_retry_arg >= 0)
4109 retry_config *yield;
4110 int basic_errno = 0;
4114 if (test_retry_arg >= argc)
4116 printf("-brt needs a domain or address argument\n");
4117 exim_exit(EXIT_FAILURE);
4119 s1 = argv[test_retry_arg++];
4122 /* If the first argument contains no @ and no . it might be a local user
4123 or it might be a single-component name. Treat as a domain. */
4125 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4127 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4128 "being \ntreated as a one-component domain, not as a local part.\n\n",
4132 /* There may be an optional second domain arg. */
4134 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4135 s2 = argv[test_retry_arg++];
4137 /* The final arg is an error name */
4139 if (test_retry_arg < argc)
4141 uschar *ss = argv[test_retry_arg];
4143 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4146 printf("%s\n", CS error);
4147 return EXIT_FAILURE;
4150 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4151 code > 100 as an error is for matching codes to the decade. Turn them into
4152 a real error code, off the decade. */
4154 if (basic_errno == ERRNO_MAIL4XX ||
4155 basic_errno == ERRNO_RCPT4XX ||
4156 basic_errno == ERRNO_DATA4XX)
4158 int code = (more_errno >> 8) & 255;
4160 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4161 else if (code > 100)
4162 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4166 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4167 if (yield == NULL) printf("No retry information found\n"); else
4170 more_errno = yield->more_errno;
4171 printf("Retry rule: %s ", yield->pattern);
4173 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4175 printf("quota%s%s ",
4176 (more_errno > 0)? "_" : "",
4177 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4179 else if (yield->basic_errno == ECONNREFUSED)
4181 printf("refused%s%s ",
4182 (more_errno > 0)? "_" : "",
4183 (more_errno == 'M')? "MX" :
4184 (more_errno == 'A')? "A" : "");
4186 else if (yield->basic_errno == ETIMEDOUT)
4189 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4191 if (more_errno != 0) printf("_%s",
4192 (more_errno == 'M')? "MX" : "A");
4195 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4196 printf("auth_failed ");
4199 for (r = yield->rules; r != NULL; r = r->next)
4201 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4202 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4208 printf(",%d.", x/1000);
4222 exim_exit(EXIT_SUCCESS);
4225 /* Handle a request to list one or more configuration options */
4229 set_process_info("listing variables");
4230 if (recipients_arg >= argc) readconf_print(US"all", NULL);
4231 else for (i = recipients_arg; i < argc; i++)
4234 (Ustrcmp(argv[i], "router") == 0 ||
4235 Ustrcmp(argv[i], "transport") == 0 ||
4236 Ustrcmp(argv[i], "authenticator") == 0 ||
4237 Ustrcmp(argv[i], "macro") == 0))
4239 readconf_print(argv[i+1], argv[i]);
4242 else readconf_print(argv[i], NULL);
4244 exim_exit(EXIT_SUCCESS);
4248 /* Handle a request to deliver one or more messages that are already on the
4249 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4250 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4252 Delivery of specific messages is typically used for a small number when
4253 prodding by hand (when the option forced_delivery will be set) or when
4254 re-execing to regain root privilege. Each message delivery must happen in a
4255 separate process, so we fork a process for each one, and run them sequentially
4256 so that debugging output doesn't get intertwined, and to avoid spawning too
4257 many processes if a long list is given. However, don't fork for the last one;
4258 this saves a process in the common case when Exim is called to deliver just one
4261 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4263 if (prod_requires_admin && !admin_user)
4265 fprintf(stderr, "exim: Permission denied\n");
4266 exim_exit(EXIT_FAILURE);
4268 set_process_info("delivering specified messages");
4269 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4270 for (i = msg_action_arg; i < argc; i++)
4275 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4276 else if ((pid = fork()) == 0)
4278 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4279 _exit(EXIT_SUCCESS);
4283 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4285 exim_exit(EXIT_FAILURE);
4289 exim_exit(EXIT_SUCCESS);
4293 /* If only a single queue run is requested, without SMTP listening, we can just
4294 turn into a queue runner, with an optional starting message id. */
4296 if (queue_interval == 0 && !daemon_listen)
4298 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4299 (start_queue_run_id == NULL)? US"" : US" starting at ",
4300 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4301 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4302 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4303 set_process_info("running the queue (single queue run)");
4304 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4305 exim_exit(EXIT_SUCCESS);
4309 /* Find the login name of the real user running this process. This is always
4310 needed when receiving a message, because it is written into the spool file. It
4311 may also be used to construct a from: or a sender: header, and in this case we
4312 need the user's full name as well, so save a copy of it, checked for RFC822
4313 syntax and munged if necessary, if it hasn't previously been set by the -F
4314 argument. We may try to get the passwd entry more than once, in case NIS or
4315 other delays are in evidence. Save the home directory for use in filter testing
4320 if ((pw = getpwuid(real_uid)) != NULL)
4322 originator_login = string_copy(US pw->pw_name);
4323 originator_home = string_copy(US pw->pw_dir);
4325 /* If user name has not been set by -F, set it from the passwd entry
4326 unless -f has been used to set the sender address by a trusted user. */
4328 if (originator_name == NULL)
4330 if (sender_address == NULL ||
4331 (!trusted_caller && filter_test == FTEST_NONE))
4333 uschar *name = US pw->pw_gecos;
4334 uschar *amp = Ustrchr(name, '&');
4337 /* Most Unix specify that a '&' character in the gecos field is
4338 replaced by a copy of the login name, and some even specify that
4339 the first character should be upper cased, so that's what we do. */
4344 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4345 amp - name, name, &loffset, originator_login, amp + 1);
4346 buffer[loffset] = toupper(buffer[loffset]);
4350 /* If a pattern for matching the gecos field was supplied, apply
4351 it and then expand the name string. */
4353 if (gecos_pattern != NULL && gecos_name != NULL)
4356 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4358 if (regex_match_and_setup(re, name, 0, -1))
4360 uschar *new_name = expand_string(gecos_name);
4362 if (new_name != NULL)
4364 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4365 "gecos field \"%s\"\n", new_name, name);
4368 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4369 "\"%s\": %s\n", gecos_name, expand_string_message);
4371 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4372 "gecos field \"%s\"\n", gecos_pattern, name);
4373 store_free((void *)re);
4375 originator_name = string_copy(name);
4378 /* A trusted caller has used -f but not -F */
4380 else originator_name = US"";
4383 /* Break the retry loop */
4388 if (++i > finduser_retries) break;
4392 /* If we cannot get a user login, log the incident and give up, unless the
4393 configuration specifies something to use. When running in the test harness,
4394 any setting of unknown_login overrides the actual name. */
4396 if (originator_login == NULL || running_in_test_harness)
4398 if (unknown_login != NULL)
4400 originator_login = expand_string(unknown_login);
4401 if (originator_name == NULL && unknown_username != NULL)
4402 originator_name = expand_string(unknown_username);
4403 if (originator_name == NULL) originator_name = US"";
4405 if (originator_login == NULL)
4406 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4410 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4413 originator_name = string_copy(parse_fix_phrase(originator_name,
4414 Ustrlen(originator_name), big_buffer, big_buffer_size));
4416 /* If a message is created by this call of Exim, the uid/gid of its originator
4417 are those of the caller. These values are overridden if an existing message is
4418 read in from the spool. */
4420 originator_uid = real_uid;
4421 originator_gid = real_gid;
4423 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4424 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4426 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4427 returns. We leave this till here so that the originator_ fields are available
4428 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4431 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4435 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4436 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4437 "mua_wrapper is set");
4442 /* If the sender ident has not been set (by a trusted caller) set it to
4443 the caller. This will get overwritten below for an inetd call. If a trusted
4444 caller has set it empty, unset it. */
4446 if (sender_ident == NULL) sender_ident = originator_login;
4447 else if (sender_ident[0] == 0) sender_ident = NULL;
4449 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4450 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4451 originator_* variables set. */
4453 if (test_rewrite_arg >= 0)
4455 really_exim = FALSE;
4456 if (test_rewrite_arg >= argc)
4458 printf("-brw needs an address argument\n");
4459 exim_exit(EXIT_FAILURE);
4461 rewrite_test(argv[test_rewrite_arg]);
4462 exim_exit(EXIT_SUCCESS);
4465 /* A locally-supplied message is considered to be coming from a local user
4466 unless a trusted caller supplies a sender address with -f, or is passing in the
4467 message via SMTP (inetd invocation or otherwise). */
4469 if ((sender_address == NULL && !smtp_input) ||
4470 (!trusted_caller && filter_test == FTEST_NONE))
4472 sender_local = TRUE;
4474 /* A trusted caller can supply authenticated_sender and authenticated_id
4475 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4476 defaults except when host checking. */
4478 if (authenticated_sender == NULL && !host_checking)
4479 authenticated_sender = string_sprintf("%s@%s", originator_login,
4480 qualify_domain_sender);
4481 if (authenticated_id == NULL && !host_checking)
4482 authenticated_id = originator_login;
4485 /* Trusted callers are always permitted to specify the sender address.
4486 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4487 is specified is the empty address. However, if a trusted caller does not
4488 specify a sender address for SMTP input, we leave sender_address unset. This
4489 causes the MAIL commands to be honoured. */
4491 if ((!smtp_input && sender_address == NULL) ||
4492 !receive_check_set_sender(sender_address))
4494 /* Either the caller is not permitted to set a general sender, or this is
4495 non-SMTP input and the trusted caller has not set a sender. If there is no
4496 sender, or if a sender other than <> is set, override with the originator's
4497 login (which will get qualified below), except when checking things. */
4499 if (sender_address == NULL /* No sender_address set */
4501 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4502 !checking && /* Not running tests, AND */
4503 filter_test == FTEST_NONE)) /* Not testing a filter */
4505 sender_address = originator_login;
4506 sender_address_forced = FALSE;
4507 sender_address_domain = 0;
4511 /* Remember whether an untrusted caller set the sender address */
4513 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4515 /* Ensure that the sender address is fully qualified unless it is the empty
4516 address, which indicates an error message, or doesn't exist (root caller, smtp
4517 interface, no -f argument). */
4519 if (sender_address != NULL && sender_address[0] != 0 &&
4520 sender_address_domain == 0)
4521 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4522 qualify_domain_sender);
4524 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4526 /* Handle a request to verify a list of addresses, or test them for delivery.
4527 This must follow the setting of the sender address, since routers can be
4528 predicated upon the sender. If no arguments are given, read addresses from
4529 stdin. Set debug_level to at least D_v to get full output for address testing.
4532 if (verify_address_mode || address_test_mode)
4535 int flags = vopt_qualify;
4537 if (verify_address_mode)
4539 if (!verify_as_sender) flags |= vopt_is_recipient;
4540 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4545 flags |= vopt_is_recipient;
4546 debug_selector |= D_v;
4547 debug_file = stderr;
4548 debug_fd = fileno(debug_file);
4549 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4552 if (recipients_arg < argc)
4554 while (recipients_arg < argc)
4556 uschar *s = argv[recipients_arg++];
4559 BOOL finished = FALSE;
4560 uschar *ss = parse_find_address_end(s, FALSE);
4561 if (*ss == ',') *ss = 0; else finished = TRUE;
4562 test_address(s, flags, &exit_value);
4565 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4572 uschar *s = get_stdinput(NULL, NULL);
4573 if (s == NULL) break;
4574 test_address(s, flags, &exit_value);
4578 exim_exit(exit_value);
4581 /* Handle expansion checking. Either expand items on the command line, or read
4582 from stdin if there aren't any. If -Mset was specified, load the message so
4583 that its variables can be used, but restrict this facility to admin users.
4584 Otherwise, if -bem was used, read a message from stdin. */
4588 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4590 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4593 fprintf(stderr, "exim: permission denied\n");
4596 message_id = argv[msg_action_arg];
4597 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4598 if (!spool_open_datafile(message_id))
4599 printf ("Failed to load message datafile %s\n", message_id);
4600 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4601 printf ("Failed to load message %s\n", message_id);
4604 /* Read a test message from a file. We fudge it up to be on stdin, saving
4605 stdin itself for later reading of expansion strings. */
4607 else if (expansion_test_message != NULL)
4609 int save_stdin = dup(0);
4610 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4613 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4615 return EXIT_FAILURE;
4618 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4619 message_ended = END_NOTENDED;
4620 read_message_body(receive_msg(extract_recipients));
4621 message_linecount += body_linecount;
4622 (void)dup2(save_stdin, 0);
4623 (void)close(save_stdin);
4624 clearerr(stdin); /* Required by Darwin */
4627 /* Allow $recipients for this testing */
4629 enable_dollar_recipients = TRUE;
4631 /* Expand command line items */
4633 if (recipients_arg < argc)
4635 while (recipients_arg < argc)
4637 uschar *s = argv[recipients_arg++];
4638 uschar *ss = expand_string(s);
4639 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4640 else printf("%s\n", CS ss);
4648 char *(*fn_readline)(const char *) = NULL;
4649 void (*fn_addhist)(const char *) = NULL;
4652 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4658 uschar *source = get_stdinput(fn_readline, fn_addhist);
4659 if (source == NULL) break;
4660 ss = expand_string(source);
4662 printf ("Failed: %s\n", expand_string_message);
4663 else printf("%s\n", CS ss);
4667 if (dlhandle != NULL) dlclose(dlhandle);
4671 /* The data file will be open after -Mset */
4673 if (deliver_datafile >= 0)
4675 (void)close(deliver_datafile);
4676 deliver_datafile = -1;
4679 exim_exit(EXIT_SUCCESS);
4683 /* The active host name is normally the primary host name, but it can be varied
4684 for hosts that want to play several parts at once. We need to ensure that it is
4685 set for host checking, and for receiving messages. */
4687 smtp_active_hostname = primary_hostname;
4688 if (raw_active_hostname != NULL)
4690 uschar *nah = expand_string(raw_active_hostname);
4693 if (!expand_string_forcedfail)
4694 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4695 "(smtp_active_hostname): %s", raw_active_hostname,
4696 expand_string_message);
4698 else if (nah[0] != 0) smtp_active_hostname = nah;
4701 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4702 given IP address so that the blocking and relay configuration can be tested.
4703 Unless a sender_ident was set by -oMt, we discard it (the default is the
4704 caller's login name). An RFC 1413 call is made only if we are running in the
4705 test harness and an incoming interface and both ports are specified, because
4706 there is no TCP/IP call to find the ident for. */
4713 if (!sender_ident_set)
4715 sender_ident = NULL;
4716 if (running_in_test_harness && sender_host_port != 0 &&
4717 interface_address != NULL && interface_port != 0)
4718 verify_get_ident(1413);
4721 /* In case the given address is a non-canonical IPv6 address, canonicize
4722 it. The code works for both IPv4 and IPv6, as it happens. */
4724 size = host_aton(sender_host_address, x);
4725 sender_host_address = store_get(48); /* large enough for full IPv6 */
4726 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4728 /* Now set up for testing */
4730 host_build_sender_fullhost();
4734 sender_local = FALSE;
4735 sender_host_notsocket = TRUE;
4736 debug_file = stderr;
4737 debug_fd = fileno(debug_file);
4738 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4739 "**** but without any ident (RFC 1413) callback.\n"
4740 "**** This is not for real!\n\n",
4741 sender_host_address);
4743 if (verify_check_host(&hosts_connection_nolog) == OK)
4744 log_write_selector &= ~L_smtp_connection;
4745 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4747 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4748 because a log line has already been written for all its failure exists
4749 (usually "connection refused: <reason>") and writing another one is
4750 unnecessary clutter. */
4752 if (smtp_start_session())
4754 reset_point = store_get(0);
4757 store_reset(reset_point);
4758 if (smtp_setup_msg() <= 0) break;
4759 if (!receive_msg(FALSE)) break;
4763 exim_exit(EXIT_SUCCESS);
4767 /* Arrange for message reception if recipients or SMTP were specified;
4768 otherwise complain unless a version print (-bV) happened or this is a filter
4769 verification test. In the former case, show the configuration file name. */
4771 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4773 if (version_printed)
4775 printf("Configuration file is %s\n", config_main_filename);
4776 return EXIT_SUCCESS;
4779 if (filter_test == FTEST_NONE)
4780 exim_usage(called_as);
4784 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4785 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4786 that we are not called from inetd, because that is rejected above. The
4787 following configuration settings are forced here:
4789 (1) Synchronous delivery (-odi)
4790 (2) Errors to stderr (-oep == -oeq)
4791 (3) No parallel remote delivery
4792 (4) Unprivileged delivery
4794 We don't force overall queueing options because there are several of them;
4795 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4796 to override any SMTP queueing. */
4800 synchronous_delivery = TRUE;
4801 arg_error_handling = ERRORS_STDERR;
4802 remote_max_parallel = 1;
4803 deliver_drop_privilege = TRUE;
4805 queue_smtp_domains = NULL;
4809 /* Prepare to accept one or more new messages on the standard input. When a
4810 message has been read, its id is returned in message_id[]. If doing immediate
4811 delivery, we fork a delivery process for each received message, except for the
4812 last one, where we can save a process switch.
4814 It is only in non-smtp mode that error_handling is allowed to be changed from
4815 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4816 sendmail error modes other than -oem ever actually used? Later: yes.) */
4818 if (!smtp_input) error_handling = arg_error_handling;
4820 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4821 logging being sent down the socket and make an identd call to get the
4826 (void)fclose(stderr);
4827 exim_nullstd(); /* Re-open to /dev/null */
4828 verify_get_ident(IDENT_PORT);
4829 host_build_sender_fullhost();
4830 set_process_info("handling incoming connection from %s via inetd",
4834 /* If the sender host address has been set, build sender_fullhost if it hasn't
4835 already been done (which it will have been for inetd). This caters for the
4836 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4837 so that the test for IP options is skipped for -bs input. */
4839 if (sender_host_address != NULL && sender_fullhost == NULL)
4841 host_build_sender_fullhost();
4842 set_process_info("handling incoming connection from %s via -oMa",
4844 sender_host_notsocket = TRUE;
4847 /* Otherwise, set the sender host as unknown except for inetd calls. This
4848 prevents host checking in the case of -bs not from inetd and also for -bS. */
4850 else if (!is_inetd) sender_host_unknown = TRUE;
4852 /* If stdout does not exist, then dup stdin to stdout. This can happen
4853 if exim is started from inetd. In this case fd 0 will be set to the socket,
4854 but fd 1 will not be set. This also happens for passed SMTP channels. */
4856 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4858 /* Set up the incoming protocol name and the state of the program. Root is
4859 allowed to force received protocol via the -oMr option above. If we have come
4860 via inetd, the process info has already been set up. We don't set
4861 received_protocol here for smtp input, as it varies according to
4862 batch/HELO/EHLO/AUTH/TLS. */
4866 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4867 smtp_batched_input? "batched " : "",
4868 (sender_address!= NULL)? sender_address : originator_login);
4872 if (received_protocol == NULL)
4873 received_protocol = string_sprintf("local%s", called_as);
4874 set_process_info("accepting a local non-SMTP message from <%s>",
4878 /* Initialize the session_local_queue-only flag (this will be ignored if
4879 mua_wrapper is set) */
4882 session_local_queue_only = queue_only;
4884 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4885 the spool if so configured. On failure, we must not attempt to send an error
4886 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4887 error code is given.) */
4889 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4891 fprintf(stderr, "exim: insufficient disk space\n");
4892 return EXIT_FAILURE;
4895 /* If this is smtp input of any kind, real or batched, handle the start of the
4898 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4899 because a log line has already been written for all its failure exists
4900 (usually "connection refused: <reason>") and writing another one is
4901 unnecessary clutter. */
4907 if (verify_check_host(&hosts_connection_nolog) == OK)
4908 log_write_selector &= ~L_smtp_connection;
4909 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4910 if (!smtp_start_session())
4913 exim_exit(EXIT_SUCCESS);
4917 /* Otherwise, set up the input size limit here. */
4921 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4922 if (expand_string_message != NULL)
4924 if (thismessage_size_limit == -1)
4925 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4926 "message_size_limit: %s", expand_string_message);
4928 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4929 "message_size_limit: %s", expand_string_message);
4933 /* Loop for several messages when reading SMTP input. If we fork any child
4934 processes, we don't want to wait for them unless synchronous delivery is
4935 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4936 same as SIG_DFL, despite the fact that documentation often lists the default as
4937 "ignore". This is a confusing area. This is what I know:
4939 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4940 processes that complete simply to go away without ever becoming defunct. You
4941 can't then wait for them - but we don't want to wait for them in the
4942 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4943 happen for all OS (e.g. *BSD is different).
4945 But that's not the end of the story. Some (many? all?) systems have the
4946 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4947 has by default, so it seems that the difference is merely one of default
4948 (compare restarting vs non-restarting signals).
4950 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4951 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4952 of the loop below. Paranoia rules.
4954 February 2003: That's *still* not the end of the story. There are now versions
4955 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4956 process then calls waitpid(), a grumble is written to the system log, because
4957 this is logically inconsistent. In other words, it doesn't like the paranoia.
4958 As a consequenc of this, the waitpid() below is now excluded if we are sure
4959 that SIG_IGN works. */
4961 if (!synchronous_delivery)
4964 struct sigaction act;
4965 act.sa_handler = SIG_IGN;
4966 sigemptyset(&(act.sa_mask));
4967 act.sa_flags = SA_NOCLDWAIT;
4968 sigaction(SIGCHLD, &act, NULL);
4970 signal(SIGCHLD, SIG_IGN);
4974 /* Save the current store pool point, for resetting at the start of
4975 each message, and save the real sender address, if any. */
4977 reset_point = store_get(0);
4978 real_sender_address = sender_address;
4980 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4981 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4986 store_reset(reset_point);
4989 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4990 input and build the recipients list, before calling receive_msg() to read the
4991 message proper. Whatever sender address is given in the SMTP transaction is
4992 often ignored for local senders - we use the actual sender, which is normally
4993 either the underlying user running this process or a -f argument provided by
4994 a trusted caller. It is saved in real_sender_address. The test for whether to
4995 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5000 if ((rc = smtp_setup_msg()) > 0)
5002 if (real_sender_address != NULL &&
5003 !receive_check_set_sender(sender_address))
5005 sender_address = raw_sender = real_sender_address;
5006 sender_address_unrewritten = NULL;
5009 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5010 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5011 the very end. The result of the ACL is ignored (as for other non-SMTP
5012 messages). It is run for its potential side effects. */
5014 if (smtp_batched_input && acl_not_smtp_start != NULL)
5016 uschar *user_msg, *log_msg;
5017 enable_dollar_recipients = TRUE;
5018 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5019 &user_msg, &log_msg);
5020 enable_dollar_recipients = FALSE;
5023 /* Now get the data for the message */
5025 more = receive_msg(extract_recipients);
5026 if (message_id[0] == 0)
5029 smtp_log_no_mail(); /* Log no mail if configured */
5030 exim_exit(EXIT_FAILURE);
5035 smtp_log_no_mail(); /* Log no mail if configured */
5036 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5040 /* In the non-SMTP case, we have all the information from the command
5041 line, but must process it in case it is in the more general RFC822
5042 format, and in any case, to detect syntax errors. Also, it appears that
5043 the use of comma-separated lists as single arguments is common, so we
5044 had better support them. */
5050 int count = argc - recipients_arg;
5051 uschar **list = argv + recipients_arg;
5053 /* These options cannot be changed dynamically for non-SMTP messages */
5055 active_local_sender_retain = local_sender_retain;
5056 active_local_from_check = local_from_check;
5058 /* Save before any rewriting */
5060 raw_sender = string_copy(sender_address);
5062 /* Loop for each argument */
5064 for (i = 0; i < count; i++)
5066 int start, end, domain;
5068 uschar *s = list[i];
5070 /* Loop for each comma-separated address */
5074 BOOL finished = FALSE;
5076 uschar *ss = parse_find_address_end(s, FALSE);
5078 if (*ss == ',') *ss = 0; else finished = TRUE;
5080 /* Check max recipients - if -t was used, these aren't recipients */
5082 if (recipients_max > 0 && ++rcount > recipients_max &&
5083 !extract_recipients)
5085 if (error_handling == ERRORS_STDERR)
5087 fprintf(stderr, "exim: too many recipients\n");
5088 exim_exit(EXIT_FAILURE);
5093 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5094 errors_sender_rc : EXIT_FAILURE;
5099 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5101 if (domain == 0 && !allow_unqualified_recipient)
5104 errmess = US"unqualified recipient address not allowed";
5107 if (recipient == NULL)
5109 if (error_handling == ERRORS_STDERR)
5111 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5112 string_printing(list[i]), errmess);
5113 exim_exit(EXIT_FAILURE);
5119 eblock.text1 = string_printing(list[i]);
5120 eblock.text2 = errmess;
5122 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5123 errors_sender_rc : EXIT_FAILURE;
5127 receive_add_recipient(recipient, -1);
5130 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5134 /* Show the recipients when debugging */
5139 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5140 if (recipients_list != NULL)
5142 debug_printf("Recipients:\n");
5143 for (i = 0; i < recipients_count; i++)
5144 debug_printf(" %s\n", recipients_list[i].address);
5148 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5149 ignored; rejecting here would just add complication, and it can just as
5150 well be done later. Allow $recipients to be visible in the ACL. */
5152 if (acl_not_smtp_start != NULL)
5154 uschar *user_msg, *log_msg;
5155 enable_dollar_recipients = TRUE;
5156 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5157 &user_msg, &log_msg);
5158 enable_dollar_recipients = FALSE;
5161 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5162 will just read the headers for the message, and not write anything onto the
5165 message_ended = END_NOTENDED;
5166 more = receive_msg(extract_recipients);
5168 /* more is always FALSE here (not SMTP message) when reading a message
5169 for real; when reading the headers of a message for filter testing,
5170 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5172 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5173 } /* Non-SMTP message reception */
5175 /* If this is a filter testing run, there are headers in store, but
5176 no message on the spool. Run the filtering code in testing mode, setting
5177 the domain to the qualify domain and the local part to the current user,
5178 unless they have been set by options. The prefix and suffix are left unset
5179 unless specified. The the return path is set to to the sender unless it has
5180 already been set from a return-path header in the message. */
5182 if (filter_test != FTEST_NONE)
5184 deliver_domain = (ftest_domain != NULL)?
5185 ftest_domain : qualify_domain_recipient;
5186 deliver_domain_orig = deliver_domain;
5187 deliver_localpart = (ftest_localpart != NULL)?
5188 ftest_localpart : originator_login;
5189 deliver_localpart_orig = deliver_localpart;
5190 deliver_localpart_prefix = ftest_prefix;
5191 deliver_localpart_suffix = ftest_suffix;
5192 deliver_home = originator_home;
5194 if (return_path == NULL)
5196 printf("Return-path copied from sender\n");
5197 return_path = string_copy(sender_address);
5201 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5203 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5205 receive_add_recipient(
5206 string_sprintf("%s%s%s@%s",
5207 (ftest_prefix == NULL)? US"" : ftest_prefix,
5209 (ftest_suffix == NULL)? US"" : ftest_suffix,
5210 deliver_domain), -1);
5212 printf("Recipient = %s\n", recipients_list[0].address);
5213 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5214 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5216 (void)chdir("/"); /* Get away from wherever the user is running this from */
5218 /* Now we run either a system filter test, or a user filter test, or both.
5219 In the latter case, headers added by the system filter will persist and be
5220 available to the user filter. We need to copy the filter variables
5223 if ((filter_test & FTEST_SYSTEM) != 0)
5225 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5226 exim_exit(EXIT_FAILURE);
5229 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5231 if ((filter_test & FTEST_USER) != 0)
5233 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5234 exim_exit(EXIT_FAILURE);
5237 exim_exit(EXIT_SUCCESS);
5240 /* Else act on the result of message reception. We should not get here unless
5241 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5242 will be TRUE. If it is not, check on the number of messages received in this
5245 if (!session_local_queue_only &&
5246 smtp_accept_queue_per_connection > 0 &&
5247 receive_messagecount > smtp_accept_queue_per_connection)
5249 session_local_queue_only = TRUE;
5250 queue_only_reason = 2;
5253 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5254 and queue_only_load is set, check that the load average is below it. If it is
5255 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5256 default), we put the whole session into queue_only mode. It then remains this
5257 way for any subsequent messages on the same SMTP connection. This is a
5258 deliberate choice; even though the load average may fall, it doesn't seem
5259 right to deliver later messages on the same call when not delivering earlier
5260 ones. However, there are odd cases where this is not wanted, so this can be
5261 changed by setting queue_only_load_latch false. */
5263 local_queue_only = session_local_queue_only;
5264 if (!local_queue_only && queue_only_load >= 0)
5266 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5267 if (local_queue_only)
5269 queue_only_reason = 3;
5270 if (queue_only_load_latch) session_local_queue_only = TRUE;
5274 /* If running as an MUA wrapper, all queueing options and freezing options
5278 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5280 /* Log the queueing here, when it will get a message id attached, but
5281 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5284 if (local_queue_only) switch(queue_only_reason)
5287 log_write(L_delay_delivery,
5288 LOG_MAIN, "no immediate delivery: more than %d messages "
5289 "received in one connection", smtp_accept_queue_per_connection);
5293 log_write(L_delay_delivery,
5294 LOG_MAIN, "no immediate delivery: load average %.2f",
5295 (double)load_average/1000.0);
5299 /* Else do the delivery unless the ACL or local_scan() called for queue only
5300 or froze the message. Always deliver in a separate process. A fork failure is
5301 not a disaster, as the delivery will eventually happen on a subsequent queue
5302 run. The search cache must be tidied before the fork, as the parent will
5303 do it before exiting. The child will trigger a lookup failure and
5304 thereby defer the delivery if it tries to use (for example) a cached ldap
5305 connection that the parent has called unbind on. */
5307 else if (!queue_only_policy && !deliver_freeze)
5312 if ((pid = fork()) == 0)
5315 close_unwanted(); /* Close unwanted file descriptors and TLS */
5316 exim_nullstd(); /* Ensure std{in,out,err} exist */
5318 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5319 mode, deliver_drop_privilege is forced TRUE). */
5321 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5323 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5325 /* Control does not return here. */
5328 /* No need to re-exec */
5330 rc = deliver_message(message_id, FALSE, FALSE);
5332 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5333 EXIT_SUCCESS : EXIT_FAILURE);
5338 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5339 "process: %s", strerror(errno));
5342 /* In the parent, wait if synchronous delivery is required. This will
5343 always be the case in MUA wrapper mode. */
5345 else if (synchronous_delivery)
5348 while (wait(&status) != pid);
5349 if ((status & 0x00ff) != 0)
5350 log_write(0, LOG_MAIN|LOG_PANIC,
5351 "process %d crashed with signal %d while delivering %s",
5352 (int)pid, status & 0x00ff, message_id);
5353 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5357 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5358 automatically reaps children (see comments above the loop), clear away any
5359 finished subprocesses here, in case there are lots of messages coming in
5360 from the same source. */
5362 #ifndef SIG_IGN_WORKS
5363 while (waitpid(-1, NULL, WNOHANG) > 0);
5367 exim_exit(EXIT_SUCCESS); /* Never returns */
5368 return 0; /* To stop compiler warning */