1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2015 */
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. */
16 # include <gnutls/gnutls.h>
17 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
22 extern void init_lookup_list(void);
26 /*************************************************
27 * Function interface to store functions *
28 *************************************************/
30 /* We need some real functions to pass to the PCRE regular expression library
31 for store allocation via Exim's store manager. The normal calls are actually
32 macros that pass over location information to make tracing easier. These
33 functions just interface to the standard macro calls. A good compiler will
34 optimize out the tail recursion and so not make them too expensive. There
35 are two sets of functions; one for use when we want to retain the compiled
36 regular expression for a long time; the other for short-term use. */
39 function_store_get(size_t size)
41 return store_get((int)size);
45 function_dummy_free(void *block) { block = block; }
48 function_store_malloc(size_t size)
50 return store_malloc((int)size);
54 function_store_free(void *block)
62 /*************************************************
63 * Enums for cmdline interface *
64 *************************************************/
66 enum commandline_info { CMDINFO_NONE=0,
67 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
72 /*************************************************
73 * Compile regular expression and panic on fail *
74 *************************************************/
76 /* This function is called when failure to compile a regular expression leads
77 to a panic exit. In other cases, pcre_compile() is called directly. In many
78 cases where this function is used, the results of the compilation are to be
79 placed in long-lived store, so we temporarily reset the store management
80 functions that PCRE uses if the use_malloc flag is set.
83 pattern the pattern to compile
84 caseless TRUE if caseless matching is required
85 use_malloc TRUE if compile into malloc store
87 Returns: pointer to the compiled pattern
91 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
94 int options = PCRE_COPT;
99 pcre_malloc = function_store_malloc;
100 pcre_free = function_store_free;
102 if (caseless) options |= PCRE_CASELESS;
103 yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
104 pcre_malloc = function_store_get;
105 pcre_free = function_dummy_free;
107 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
108 "%s at offset %d while compiling %s", error, offset, pattern);
115 /*************************************************
116 * Execute regular expression and set strings *
117 *************************************************/
119 /* This function runs a regular expression match, and sets up the pointers to
120 the matched substrings.
123 re the compiled expression
124 subject the subject string
125 options additional PCRE options
126 setup if < 0 do full setup
127 if >= 0 setup from setup+1 onwards,
128 excluding the full matched string
130 Returns: TRUE or FALSE
134 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
136 int ovector[3*(EXPAND_MAXN+1)];
137 uschar * s = string_copy(subject); /* de-constifying */
138 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
139 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
141 if (n == 0) n = EXPAND_MAXN + 1;
145 expand_nmax = (setup < 0)? 0 : setup + 1;
146 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
148 expand_nstring[expand_nmax] = s + ovector[nn];
149 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
159 /*************************************************
160 * Set up processing details *
161 *************************************************/
163 /* Save a text string for dumping when SIGUSR1 is received.
164 Do checks for overruns.
166 Arguments: format and arguments, as for printf()
171 set_process_info(const char *format, ...)
175 sprintf(CS process_info, "%5d ", (int)getpid());
176 len = Ustrlen(process_info);
177 va_start(ap, format);
178 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
179 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
180 len = Ustrlen(process_info);
181 process_info[len+0] = '\n';
182 process_info[len+1] = '\0';
183 process_info_len = len + 1;
184 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
191 /*************************************************
192 * Handler for SIGUSR1 *
193 *************************************************/
195 /* SIGUSR1 causes any exim process to write to the process log details of
196 what it is currently doing. It will only be used if the OS is capable of
197 setting up a handler that causes automatic restarting of any system call
198 that is in progress at the time.
200 This function takes care to be signal-safe.
202 Argument: the signal number (SIGUSR1)
207 usr1_handler(int sig)
211 os_restarting_signal(sig, usr1_handler);
213 fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
216 /* If we are already running as the Exim user, try to create it in the
217 current process (assuming spool_directory exists). Otherwise, if we are
218 root, do the creation in an exim:exim subprocess. */
220 int euid = geteuid();
221 if (euid == exim_uid)
222 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
223 else if (euid == root_uid)
224 fd = log_create_as_exim(process_log_path);
227 /* If we are neither exim nor root, or if we failed to create the log file,
228 give up. There is not much useful we can do with errors, since we don't want
229 to disrupt whatever is going on outside the signal handler. */
233 (void)write(fd, process_info, process_info_len);
239 /*************************************************
241 *************************************************/
243 /* This handler is enabled most of the time that Exim is running. The handler
244 doesn't actually get used unless alarm() has been called to set a timer, to
245 place a time limit on a system call of some kind. When the handler is run, it
248 There are some other SIGALRM handlers that are used in special cases when more
249 than just a flag setting is required; for example, when reading a message's
250 input. These are normally set up in the code module that uses them, and the
251 SIGALRM handler is reset to this one afterwards.
253 Argument: the signal value (SIGALRM)
258 sigalrm_handler(int sig)
260 sig = sig; /* Keep picky compilers happy */
262 os_non_restarting_signal(SIGALRM, sigalrm_handler);
267 /*************************************************
268 * Sleep for a fractional time interval *
269 *************************************************/
271 /* This function is called by millisleep() and exim_wait_tick() to wait for a
272 period of time that may include a fraction of a second. The coding is somewhat
273 tedious. We do not expect setitimer() ever to fail, but if it does, the process
274 will wait for ever, so we panic in this instance. (There was a case of this
275 when a bug in a function that calls milliwait() caused it to pass invalid data.
276 That's when I added the check. :-)
278 We assume it to be not worth sleeping for under 100us; this value will
279 require revisiting as hardware advances. This avoids the issue of
280 a zero-valued timer setting meaning "never fire".
282 Argument: an itimerval structure containing the interval
287 milliwait(struct itimerval *itval)
290 sigset_t old_sigmask;
292 if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
294 (void)sigemptyset(&sigmask); /* Empty mask */
295 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
296 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
297 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
298 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
299 "setitimer() failed: %s", strerror(errno));
300 (void)sigfillset(&sigmask); /* All signals */
301 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
302 (void)sigsuspend(&sigmask); /* Until SIGALRM */
303 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
309 /*************************************************
310 * Millisecond sleep function *
311 *************************************************/
313 /* The basic sleep() function has a granularity of 1 second, which is too rough
314 in some cases - for example, when using an increasing delay to slow down
317 Argument: number of millseconds
324 struct itimerval itval;
325 itval.it_interval.tv_sec = 0;
326 itval.it_interval.tv_usec = 0;
327 itval.it_value.tv_sec = msec/1000;
328 itval.it_value.tv_usec = (msec % 1000) * 1000;
334 /*************************************************
335 * Compare microsecond times *
336 *************************************************/
343 Returns: -1, 0, or +1
347 exim_tvcmp(struct timeval *t1, struct timeval *t2)
349 if (t1->tv_sec > t2->tv_sec) return +1;
350 if (t1->tv_sec < t2->tv_sec) return -1;
351 if (t1->tv_usec > t2->tv_usec) return +1;
352 if (t1->tv_usec < t2->tv_usec) return -1;
359 /*************************************************
360 * Clock tick wait function *
361 *************************************************/
363 /* Exim uses a time + a pid to generate a unique identifier in two places: its
364 message IDs, and in file names for maildir deliveries. Because some OS now
365 re-use pids within the same second, sub-second times are now being used.
366 However, for absolute certaintly, we must ensure the clock has ticked before
367 allowing the relevant process to complete. At the time of implementation of
368 this code (February 2003), the speed of processors is such that the clock will
369 invariably have ticked already by the time a process has done its job. This
370 function prepares for the time when things are faster - and it also copes with
371 clocks that go backwards.
374 then_tv A timeval which was used to create uniqueness; its usec field
375 has been rounded down to the value of the resolution.
376 We want to be sure the current time is greater than this.
377 resolution The resolution that was used to divide the microseconds
378 (1 for maildir, larger for message ids)
384 exim_wait_tick(struct timeval *then_tv, int resolution)
386 struct timeval now_tv;
387 long int now_true_usec;
389 (void)gettimeofday(&now_tv, NULL);
390 now_true_usec = now_tv.tv_usec;
391 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
393 if (exim_tvcmp(&now_tv, then_tv) <= 0)
395 struct itimerval itval;
396 itval.it_interval.tv_sec = 0;
397 itval.it_interval.tv_usec = 0;
398 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
399 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
401 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
402 negative value for the microseconds is possible only in the case when "now"
403 is more than a second less than "then". That means that itval.it_value.tv_sec
404 is greater than zero. The following correction is therefore safe. */
406 if (itval.it_value.tv_usec < 0)
408 itval.it_value.tv_usec += 1000000;
409 itval.it_value.tv_sec -= 1;
412 DEBUG(D_transport|D_receive)
414 if (!running_in_test_harness)
416 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
417 then_tv->tv_sec, (long) then_tv->tv_usec,
418 now_tv.tv_sec, (long) now_tv.tv_usec);
419 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
420 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
431 /*************************************************
432 * Call fopen() with umask 777 and adjust mode *
433 *************************************************/
435 /* Exim runs with umask(0) so that files created with open() have the mode that
436 is specified in the open() call. However, there are some files, typically in
437 the spool directory, that are created with fopen(). They end up world-writeable
438 if no precautions are taken. Although the spool directory is not accessible to
439 the world, this is an untidiness. So this is a wrapper function for fopen()
440 that sorts out the mode of the created file.
443 filename the file name
444 options the fopen() options
445 mode the required mode
447 Returns: the fopened FILE or NULL
451 modefopen(const uschar *filename, const char *options, mode_t mode)
453 mode_t saved_umask = umask(0777);
454 FILE *f = Ufopen(filename, options);
455 (void)umask(saved_umask);
456 if (f != NULL) (void)fchmod(fileno(f), mode);
463 /*************************************************
464 * Ensure stdin, stdout, and stderr exist *
465 *************************************************/
467 /* Some operating systems grumble if an exec() happens without a standard
468 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
469 file will be opened and will use these fd values, and then some other bit of
470 code will assume, for example, that it can write error messages to stderr.
471 This function ensures that fds 0, 1, and 2 are open if they do not already
472 exist, by connecting them to /dev/null.
474 This function is also used to ensure that std{in,out,err} exist at all times,
475 so that if any library that Exim calls tries to use them, it doesn't crash.
487 for (i = 0; i <= 2; i++)
489 if (fstat(i, &statbuf) < 0 && errno == EBADF)
491 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
492 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
493 string_open_failed(errno, "/dev/null"));
494 if (devnull != i) (void)dup2(devnull, i);
497 if (devnull > 2) (void)close(devnull);
503 /*************************************************
504 * Close unwanted file descriptors for delivery *
505 *************************************************/
507 /* This function is called from a new process that has been forked to deliver
508 an incoming message, either directly, or using exec.
510 We want any smtp input streams to be closed in this new process. However, it
511 has been observed that using fclose() here causes trouble. When reading in -bS
512 input, duplicate copies of messages have been seen. The files will be sharing a
513 file pointer with the parent process, and it seems that fclose() (at least on
514 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
515 least sometimes. Hence we go for closing the underlying file descriptors.
517 If TLS is active, we want to shut down the TLS library, but without molesting
518 the parent's SSL connection.
520 For delivery of a non-SMTP message, we want to close stdin and stdout (and
521 stderr unless debugging) because the calling process might have set them up as
522 pipes and be waiting for them to close before it waits for the submission
523 process to terminate. If they aren't closed, they hold up the calling process
524 until the initial delivery process finishes, which is not what we want.
526 Exception: We do want it for synchronous delivery!
528 And notwithstanding all the above, if D_resolver is set, implying resolver
529 debugging, leave stdout open, because that's where the resolver writes its
532 When we close stderr (which implies we've also closed stdout), we also get rid
533 of any controlling terminal.
545 tls_close(TRUE, FALSE); /* Shut down the TLS library */
547 (void)close(fileno(smtp_in));
548 (void)close(fileno(smtp_out));
553 (void)close(0); /* stdin */
554 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
555 if (debug_selector == 0) /* stderr */
557 if (!synchronous_delivery)
570 /*************************************************
572 *************************************************/
574 /* This function sets a new uid and gid permanently, optionally calling
575 initgroups() to set auxiliary groups. There are some special cases when running
576 Exim in unprivileged modes. In these situations the effective uid will not be
577 root; if we already have the right effective uid/gid, and don't need to
578 initialize any groups, leave things as they are.
583 igflag TRUE if initgroups() wanted
584 msg text to use in debugging output and failure log
586 Returns: nothing; bombs out on failure
590 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
592 uid_t euid = geteuid();
593 gid_t egid = getegid();
595 if (euid == root_uid || euid != uid || egid != gid || igflag)
597 /* At least one OS returns +1 for initgroups failure, so just check for
602 struct passwd *pw = getpwuid(uid);
605 if (initgroups(pw->pw_name, gid) != 0)
606 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
607 (long int)uid, strerror(errno));
609 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
610 "no passwd entry for uid=%ld", (long int)uid);
613 if (setgid(gid) < 0 || setuid(uid) < 0)
615 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
616 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
620 /* Debugging output included uid/gid and all groups */
624 int group_count, save_errno;
625 gid_t group_list[NGROUPS_MAX];
626 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
627 (long int)geteuid(), (long int)getegid(), (long int)getpid());
628 group_count = getgroups(NGROUPS_MAX, group_list);
630 debug_printf(" auxiliary group list:");
634 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
636 else if (group_count < 0)
637 debug_printf(" <error: %s>", strerror(save_errno));
638 else debug_printf(" <none>");
646 /*************************************************
648 *************************************************/
650 /* Exim exits via this function so that it always clears up any open
656 Returns: does not return
664 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
665 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
672 /*************************************************
673 * Extract port from host address *
674 *************************************************/
676 /* Called to extract the port from the values given to -oMa and -oMi.
677 It also checks the syntax of the address, and terminates it before the
678 port data when a port is extracted.
681 address the address, with possible port on the end
683 Returns: the port, or zero if there isn't one
684 bombs out on a syntax error
688 check_port(uschar *address)
690 int port = host_address_extract_port(address);
691 if (string_is_ip_address(address, NULL) == 0)
693 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
701 /*************************************************
702 * Test/verify an address *
703 *************************************************/
705 /* This function is called by the -bv and -bt code. It extracts a working
706 address from a full RFC 822 address. This isn't really necessary per se, but it
707 has the effect of collapsing source routes.
711 flags flag bits for verify_address()
712 exit_value to be set for failures
718 test_address(uschar *s, int flags, int *exit_value)
720 int start, end, domain;
721 uschar *parse_error = NULL;
722 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
726 fprintf(stdout, "syntax error: %s\n", parse_error);
731 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
732 -1, -1, NULL, NULL, NULL);
733 if (rc == FAIL) *exit_value = 2;
734 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
740 /*************************************************
741 * Show supported features *
742 *************************************************/
744 /* This function is called for -bV/--version and for -d to output the optional
745 features of the current Exim binary.
747 Arguments: a FILE for printing
752 show_whats_supported(FILE *f)
756 #ifdef DB_VERSION_STRING
757 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
758 #elif defined(BTREEVERSION) && defined(HASHVERSION)
760 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
762 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
764 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
765 fprintf(f, "Probably ndbm\n");
766 #elif defined(USE_TDB)
767 fprintf(f, "Using tdb\n");
770 fprintf(f, "Probably GDBM (native mode)\n");
772 fprintf(f, "Probably GDBM (compatibility mode)\n");
776 fprintf(f, "Support for:");
777 #ifdef SUPPORT_CRYPTEQ
778 fprintf(f, " crypteq");
781 fprintf(f, " iconv()");
786 #ifdef HAVE_SETCLASSRESOURCES
787 fprintf(f, " use_setclassresources");
796 fprintf(f, " Expand_dlfunc");
798 #ifdef USE_TCP_WRAPPERS
799 fprintf(f, " TCPwrappers");
803 fprintf(f, " GnuTLS");
805 fprintf(f, " OpenSSL");
808 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
809 fprintf(f, " translate_ip_address");
811 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
812 fprintf(f, " move_frozen_messages");
814 #ifdef WITH_CONTENT_SCAN
815 fprintf(f, " Content_Scanning");
817 #ifdef WITH_OLD_DEMIME
818 fprintf(f, " Old_Demime");
823 #ifndef DISABLE_DNSSEC
824 fprintf(f, " DNSSEC");
833 fprintf(f, " PROXY");
836 fprintf(f, " SOCKS");
838 #ifdef EXPERIMENTAL_SPF
839 fprintf(f, " Experimental_SPF");
841 #ifdef EXPERIMENTAL_SRS
842 fprintf(f, " Experimental_SRS");
844 #ifdef EXPERIMENTAL_BRIGHTMAIL
845 fprintf(f, " Experimental_Brightmail");
847 #ifdef EXPERIMENTAL_DANE
848 fprintf(f, " Experimental_DANE");
850 #ifdef EXPERIMENTAL_DCC
851 fprintf(f, " Experimental_DCC");
853 #ifdef EXPERIMENTAL_DMARC
854 fprintf(f, " Experimental_DMARC");
856 #ifdef EXPERIMENTAL_DSN_INFO
857 fprintf(f, " Experimental_DSN_info");
859 #ifdef EXPERIMENTAL_INTERNATIONAL
860 fprintf(f, " Experimental_International");
862 #ifdef EXPERIMENTAL_EVENT
863 fprintf(f, " Experimental_Event");
865 #ifdef EXPERIMENTAL_REDIS
866 fprintf(f, " Experimental_Redis");
870 fprintf(f, "Lookups (built-in):");
871 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
872 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
874 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
877 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
878 fprintf(f, " dbm dbmjz dbmnz");
880 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
881 fprintf(f, " dnsdb");
883 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
884 fprintf(f, " dsearch");
886 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
887 fprintf(f, " ibase");
889 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
890 fprintf(f, " ldap ldapdn ldapm");
892 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
893 fprintf(f, " mysql");
895 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
896 fprintf(f, " nis nis0");
898 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
899 fprintf(f, " nisplus");
901 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
902 fprintf(f, " oracle");
904 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
905 fprintf(f, " passwd");
907 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
908 fprintf(f, " pgsql");
910 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
911 fprintf(f, " sqlite");
913 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
914 fprintf(f, " testdb");
916 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
917 fprintf(f, " whoson");
921 fprintf(f, "Authenticators:");
923 fprintf(f, " cram_md5");
925 #ifdef AUTH_CYRUS_SASL
926 fprintf(f, " cyrus_sasl");
929 fprintf(f, " dovecot");
932 fprintf(f, " gsasl");
934 #ifdef AUTH_HEIMDAL_GSSAPI
935 fprintf(f, " heimdal_gssapi");
937 #ifdef AUTH_PLAINTEXT
938 fprintf(f, " plaintext");
948 fprintf(f, "Routers:");
950 fprintf(f, " accept");
952 #ifdef ROUTER_DNSLOOKUP
953 fprintf(f, " dnslookup");
955 #ifdef ROUTER_IPLITERAL
956 fprintf(f, " ipliteral");
958 #ifdef ROUTER_IPLOOKUP
959 fprintf(f, " iplookup");
961 #ifdef ROUTER_MANUALROUTE
962 fprintf(f, " manualroute");
964 #ifdef ROUTER_QUERYPROGRAM
965 fprintf(f, " queryprogram");
967 #ifdef ROUTER_REDIRECT
968 fprintf(f, " redirect");
972 fprintf(f, "Transports:");
973 #ifdef TRANSPORT_APPENDFILE
974 fprintf(f, " appendfile");
975 #ifdef SUPPORT_MAILDIR
976 fprintf(f, "/maildir");
978 #ifdef SUPPORT_MAILSTORE
979 fprintf(f, "/mailstore");
985 #ifdef TRANSPORT_AUTOREPLY
986 fprintf(f, " autoreply");
988 #ifdef TRANSPORT_LMTP
991 #ifdef TRANSPORT_PIPE
994 #ifdef TRANSPORT_SMTP
999 if (fixed_never_users[0] > 0)
1002 fprintf(f, "Fixed never_users: ");
1003 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1004 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1005 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1008 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1010 /* Everything else is details which are only worth reporting when debugging.
1011 Perhaps the tls_version_report should move into this too. */
1016 /* clang defines __GNUC__ (at least, for me) so test for it first */
1017 #if defined(__clang__)
1018 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1019 #elif defined(__GNUC__)
1020 fprintf(f, "Compiler: GCC [%s]\n",
1024 "? unknown version ?"
1028 fprintf(f, "Compiler: <unknown>\n");
1032 tls_version_report(f);
1034 #ifdef EXPERIMENTAL_INTERNATIONAL
1035 utf8_version_report(f);
1038 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1039 if (authi->version_report)
1040 (*authi->version_report)(f);
1042 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1043 characters; unless it's an ancient version of PCRE in which case it
1045 #ifndef PCRE_PRERELEASE
1046 #define PCRE_PRERELEASE
1049 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1050 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1052 PCRE_MAJOR, PCRE_MINOR,
1053 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1056 #undef EXPAND_AND_QUOTE
1059 for (i = 0; i < lookup_list_count; i++)
1060 if (lookup_list[i]->version_report)
1061 lookup_list[i]->version_report(f);
1063 #ifdef WHITELIST_D_MACROS
1064 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1066 fprintf(f, "WHITELIST_D_MACROS unset\n");
1068 #ifdef TRUSTED_CONFIG_LIST
1069 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1071 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1078 /*************************************************
1079 * Show auxiliary information about Exim *
1080 *************************************************/
1083 show_exim_information(enum commandline_info request, FILE *stream)
1090 fprintf(stream, "Oops, something went wrong.\n");
1094 "The -bI: flag takes a string indicating which information to provide.\n"
1095 "If the string is not recognised, you'll get this help (on stderr).\n"
1097 " exim -bI:help this information\n"
1098 " exim -bI:dscp dscp value keywords known\n"
1099 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1103 for (pp = exim_sieve_extension_list; *pp; ++pp)
1104 fprintf(stream, "%s\n", *pp);
1107 dscp_list_to_stream(stream);
1113 /*************************************************
1114 * Quote a local part *
1115 *************************************************/
1117 /* This function is used when a sender address or a From: or Sender: header
1118 line is being created from the caller's login, or from an authenticated_id. It
1119 applies appropriate quoting rules for a local part.
1121 Argument: the local part
1122 Returns: the local part, quoted if necessary
1126 local_part_quote(uschar *lpart)
1128 BOOL needs_quote = FALSE;
1133 for (t = lpart; !needs_quote && *t != 0; t++)
1135 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1136 (*t != '.' || t == lpart || t[1] == 0);
1139 if (!needs_quote) return lpart;
1142 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1146 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1149 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1152 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1153 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1154 yield = string_cat(yield, &size, &ptr, nq, 1);
1158 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1166 /*************************************************
1167 * Load readline() functions *
1168 *************************************************/
1170 /* This function is called from testing executions that read data from stdin,
1171 but only when running as the calling user. Currently, only -be does this. The
1172 function loads the readline() function library and passes back the functions.
1173 On some systems, it needs the curses library, so load that too, but try without
1174 it if loading fails. All this functionality has to be requested at build time.
1177 fn_readline_ptr pointer to where to put the readline pointer
1178 fn_addhist_ptr pointer to where to put the addhistory function
1180 Returns: the dlopen handle or NULL on failure
1184 set_readline(char * (**fn_readline_ptr)(const char *),
1185 void (**fn_addhist_ptr)(const char *))
1188 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1190 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1191 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1193 if (dlhandle != NULL)
1195 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1196 * char * readline (const char *prompt);
1197 * void add_history (const char *string);
1199 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1200 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1204 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1213 /*************************************************
1214 * Get a line from stdin for testing things *
1215 *************************************************/
1217 /* This function is called when running tests that can take a number of lines
1218 of input (for example, -be and -bt). It handles continuations and trailing
1219 spaces. And prompting and a blank line output on eof. If readline() is in use,
1220 the arguments are non-NULL and provide the relevant functions.
1223 fn_readline readline function or NULL
1224 fn_addhist addhist function or NULL
1226 Returns: pointer to dynamic memory, or NULL at end of file
1230 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1235 uschar *yield = NULL;
1237 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1241 uschar buffer[1024];
1245 char *readline_line = NULL;
1246 if (fn_readline != NULL)
1248 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1249 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1250 p = US readline_line;
1255 /* readline() not in use */
1258 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1262 /* Handle the line */
1264 ss = p + (int)Ustrlen(p);
1265 while (ss > p && isspace(ss[-1])) ss--;
1269 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1272 yield = string_cat(yield, &size, &ptr, p, ss - p);
1275 if (fn_readline != NULL) free(readline_line);
1278 if (ss == p || yield[ptr-1] != '\\')
1286 if (yield == NULL) printf("\n");
1292 /*************************************************
1293 * Output usage information for the program *
1294 *************************************************/
1296 /* This function is called when there are no recipients
1297 or a specific --help argument was added.
1300 progname information on what name we were called by
1302 Returns: DOES NOT RETURN
1306 exim_usage(uschar *progname)
1309 /* Handle specific program invocation varients */
1310 if (Ustrcmp(progname, US"-mailq") == 0)
1313 "mailq - list the contents of the mail queue\n\n"
1314 "For a list of options, see the Exim documentation.\n");
1318 /* Generic usage - we output this whatever happens */
1320 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1321 "not directly from a shell command line. Options and/or arguments control\n"
1322 "what it does when called. For a list of options, see the Exim documentation.\n");
1329 /*************************************************
1330 * Validate that the macros given are okay *
1331 *************************************************/
1333 /* Typically, Exim will drop privileges if macros are supplied. In some
1334 cases, we want to not do so.
1336 Arguments: none (macros is a global)
1337 Returns: true if trusted, false otherwise
1341 macros_trusted(void)
1343 #ifdef WHITELIST_D_MACROS
1345 uschar *whitelisted, *end, *p, **whites, **w;
1346 int white_count, i, n;
1348 BOOL prev_char_item, found;
1353 #ifndef WHITELIST_D_MACROS
1357 /* We only trust -D overrides for some invoking users:
1358 root, the exim run-time user, the optional config owner user.
1359 I don't know why config-owner would be needed, but since they can own the
1360 config files anyway, there's no security risk to letting them override -D. */
1361 if ( ! ((real_uid == root_uid)
1362 || (real_uid == exim_uid)
1363 #ifdef CONFIGURE_OWNER
1364 || (real_uid == config_uid)
1368 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1372 /* Get a list of macros which are whitelisted */
1373 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1374 prev_char_item = FALSE;
1376 for (p = whitelisted; *p != '\0'; ++p)
1378 if (*p == ':' || isspace(*p))
1383 prev_char_item = FALSE;
1386 if (!prev_char_item)
1387 prev_char_item = TRUE;
1394 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1395 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1400 if (i == white_count)
1402 while (*p != '\0' && p < end)
1408 /* The list of macros should be very short. Accept the N*M complexity. */
1409 for (m = macros; m != NULL; m = m->next)
1412 for (w = whites; *w; ++w)
1413 if (Ustrcmp(*w, m->name) == 0)
1420 if (m->replacement == NULL)
1422 len = Ustrlen(m->replacement);
1425 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1426 0, PCRE_EOPT, NULL, 0);
1429 if (n != PCRE_ERROR_NOMATCH)
1430 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1434 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1440 /*************************************************
1441 * Entry point and high-level code *
1442 *************************************************/
1444 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1445 the appropriate action. All the necessary functions are present in the one
1446 binary. I originally thought one should split it up, but it turns out that so
1447 much of the apparatus is needed in each chunk that one might as well just have
1448 it all available all the time, which then makes the coding easier as well.
1451 argc count of entries in argv
1452 argv argument strings, with argv[0] being the program name
1454 Returns: EXIT_SUCCESS if terminated successfully
1455 EXIT_FAILURE otherwise, except when a message has been sent
1456 to the sender, and -oee was given
1460 main(int argc, char **cargv)
1462 uschar **argv = USS cargv;
1463 int arg_receive_timeout = -1;
1464 int arg_smtp_receive_timeout = -1;
1465 int arg_error_handling = error_handling;
1466 int filter_sfd = -1;
1467 int filter_ufd = -1;
1470 int list_queue_option = 0;
1472 int msg_action_arg = -1;
1473 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1474 int queue_only_reason = 0;
1476 int perl_start_option = 0;
1478 int recipients_arg = argc;
1479 int sender_address_domain = 0;
1480 int test_retry_arg = -1;
1481 int test_rewrite_arg = -1;
1482 BOOL arg_queue_only = FALSE;
1483 BOOL bi_option = FALSE;
1484 BOOL checking = FALSE;
1485 BOOL count_queue = FALSE;
1486 BOOL expansion_test = FALSE;
1487 BOOL extract_recipients = FALSE;
1488 BOOL flag_G = FALSE;
1489 BOOL flag_n = FALSE;
1490 BOOL forced_delivery = FALSE;
1491 BOOL f_end_dot = FALSE;
1492 BOOL deliver_give_up = FALSE;
1493 BOOL list_queue = FALSE;
1494 BOOL list_options = FALSE;
1495 BOOL list_config = FALSE;
1496 BOOL local_queue_only;
1498 BOOL one_msg_action = FALSE;
1499 BOOL queue_only_set = FALSE;
1500 BOOL receiving_message = TRUE;
1501 BOOL sender_ident_set = FALSE;
1502 BOOL session_local_queue_only;
1504 BOOL removed_privilege = FALSE;
1505 BOOL usage_wanted = FALSE;
1506 BOOL verify_address_mode = FALSE;
1507 BOOL verify_as_sender = FALSE;
1508 BOOL version_printed = FALSE;
1509 uschar *alias_arg = NULL;
1510 uschar *called_as = US"";
1511 uschar *cmdline_syslog_name = NULL;
1512 uschar *start_queue_run_id = NULL;
1513 uschar *stop_queue_run_id = NULL;
1514 uschar *expansion_test_message = NULL;
1515 uschar *ftest_domain = NULL;
1516 uschar *ftest_localpart = NULL;
1517 uschar *ftest_prefix = NULL;
1518 uschar *ftest_suffix = NULL;
1519 uschar *log_oneline = NULL;
1520 uschar *malware_test_file = NULL;
1521 uschar *real_sender_address;
1522 uschar *originator_home = US"/";
1527 struct stat statbuf;
1528 pid_t passed_qr_pid = (pid_t)0;
1529 int passed_qr_pipe = -1;
1530 gid_t group_list[NGROUPS_MAX];
1532 /* For the -bI: flag */
1533 enum commandline_info info_flag = CMDINFO_NONE;
1534 BOOL info_stdout = FALSE;
1536 /* Possible options for -R and -S */
1538 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1540 /* Need to define this in case we need to change the environment in order
1541 to get rid of a bogus time zone. We have to make it char rather than uschar
1542 because some OS define it in /usr/include/unistd.h. */
1544 extern char **environ;
1546 /* If the Exim user and/or group and/or the configuration file owner/group were
1547 defined by ref:name at build time, we must now find the actual uid/gid values.
1548 This is a feature to make the lives of binary distributors easier. */
1550 #ifdef EXIM_USERNAME
1551 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1555 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1559 /* If ref:name uses a number as the name, route_finduser() returns
1560 TRUE with exim_uid set and pw coerced to NULL. */
1562 exim_gid = pw->pw_gid;
1563 #ifndef EXIM_GROUPNAME
1567 "exim: ref:name should specify a usercode, not a group.\n"
1568 "exim: can't let you get away with it unless you also specify a group.\n");
1575 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1581 #ifdef EXIM_GROUPNAME
1582 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1584 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1590 #ifdef CONFIGURE_OWNERNAME
1591 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1593 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1594 CONFIGURE_OWNERNAME);
1599 /* We default the system_filter_user to be the Exim run-time user, as a
1600 sane non-root value. */
1601 system_filter_uid = exim_uid;
1603 #ifdef CONFIGURE_GROUPNAME
1604 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1606 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1607 CONFIGURE_GROUPNAME);
1612 /* In the Cygwin environment, some initialization used to need doing.
1613 It was fudged in by means of this macro; now no longer but we'll leave
1614 it in case of others. */
1620 /* Check a field which is patched when we are running Exim within its
1621 testing harness; do a fast initial check, and then the whole thing. */
1623 running_in_test_harness =
1624 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1626 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1627 at the start of a program; however, it seems that some environments do not
1628 follow this. A "strange" locale can affect the formatting of timestamps, so we
1631 setlocale(LC_ALL, "C");
1633 /* Set up the default handler for timing using alarm(). */
1635 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1637 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1638 because store_malloc writes a log entry on failure. */
1640 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1641 if (log_buffer == NULL)
1643 fprintf(stderr, "exim: failed to get store for log buffer\n");
1647 /* Initialize the default log options. */
1649 bits_set(log_selector, log_selector_size, log_default);
1651 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1652 NULL when the daemon is run and the file is closed. We have to use this
1653 indirection, because some systems don't allow writing to the variable "stderr".
1656 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1658 /* Arrange for the PCRE regex library to use our store functions. Note that
1659 the normal calls are actually macros that add additional arguments for
1660 debugging purposes so we have to assign specially constructed functions here.
1661 The default is to use store in the stacking pool, but this is overridden in the
1662 regex_must_compile() function. */
1664 pcre_malloc = function_store_get;
1665 pcre_free = function_dummy_free;
1667 /* Ensure there is a big buffer for temporary use in several places. It is put
1668 in malloc store so that it can be freed for enlargement if necessary. */
1670 big_buffer = store_malloc(big_buffer_size);
1672 /* Set up the handler for the data request signal, and set the initial
1673 descriptive text. */
1675 set_process_info("initializing");
1676 os_restarting_signal(SIGUSR1, usr1_handler);
1678 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1679 in the daemon code. For the rest of Exim's uses, we ignore it. */
1681 signal(SIGHUP, SIG_IGN);
1683 /* We don't want to die on pipe errors as the code is written to handle
1684 the write error instead. */
1686 signal(SIGPIPE, SIG_IGN);
1688 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1689 set to SIG_IGN. This causes subprocesses that complete before the parent
1690 process waits for them not to hang around, so when Exim calls wait(), nothing
1691 is there. The wait() code has been made robust against this, but let's ensure
1692 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1693 ending status. We use sigaction rather than plain signal() on those OS where
1694 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1695 problem on AIX with this.) */
1699 struct sigaction act;
1700 act.sa_handler = SIG_DFL;
1701 sigemptyset(&(act.sa_mask));
1703 sigaction(SIGCHLD, &act, NULL);
1706 signal(SIGCHLD, SIG_DFL);
1709 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1714 /* Set up the version number. Set up the leading 'E' for the external form of
1715 message ids, set the pointer to the internal form, and initialize it to
1716 indicate no message being processed. */
1719 message_id_option[0] = '-';
1720 message_id_external = message_id_option + 1;
1721 message_id_external[0] = 'E';
1722 message_id = message_id_external + 1;
1725 /* Set the umask to zero so that any files Exim creates using open() are
1726 created with the modes that it specifies. NOTE: Files created with fopen() have
1727 a problem, which was not recognized till rather late (February 2006). With this
1728 umask, such files will be world writeable. (They are all content scanning files
1729 in the spool directory, which isn't world-accessible, so this is not a
1730 disaster, but it's untidy.) I don't want to change this overall setting,
1731 however, because it will interact badly with the open() calls. Instead, there's
1732 now a function called modefopen() that fiddles with the umask while calling
1737 /* Precompile the regular expression for matching a message id. Keep this in
1738 step with the code that generates ids in the accept.c module. We need to do
1739 this here, because the -M options check their arguments for syntactic validity
1740 using mac_ismsgid, which uses this. */
1743 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1745 /* Precompile the regular expression that is used for matching an SMTP error
1746 code, possibly extended, at the start of an error message. Note that the
1747 terminating whitespace character is included. */
1750 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1753 #ifdef WHITELIST_D_MACROS
1754 /* Precompile the regular expression used to filter the content of macros
1755 given to -D for permissibility. */
1757 regex_whitelisted_macro =
1758 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1761 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1764 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1765 this seems to be a generally accepted convention, since one finds symbolic
1766 links called "mailq" in standard OS configurations. */
1768 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1769 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1772 receiving_message = FALSE;
1773 called_as = US"-mailq";
1776 /* If the program is called as "rmail" treat it as equivalent to
1777 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1778 i.e. preventing a single dot on a line from terminating the message, and
1779 returning with zero return code, even in cases of error (provided an error
1780 message has been sent). */
1782 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1783 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1786 called_as = US"-rmail";
1787 errors_sender_rc = EXIT_SUCCESS;
1790 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1791 this is a smail convention. */
1793 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1794 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1796 smtp_input = smtp_batched_input = TRUE;
1797 called_as = US"-rsmtp";
1800 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1801 this is a smail convention. */
1803 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1804 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1807 receiving_message = FALSE;
1808 called_as = US"-runq";
1811 /* If the program is called as "newaliases" treat it as equivalent to
1812 "exim -bi"; this is a sendmail convention. */
1814 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1815 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1818 receiving_message = FALSE;
1819 called_as = US"-newaliases";
1822 /* Save the original effective uid for a couple of uses later. It should
1823 normally be root, but in some esoteric environments it may not be. */
1825 original_euid = geteuid();
1827 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1828 to be the same as the real ones. This makes a difference only if Exim is setuid
1829 (or setgid) to something other than root, which could be the case in some
1830 special configurations. */
1832 real_uid = getuid();
1833 real_gid = getgid();
1835 if (real_uid == root_uid)
1837 rv = setgid(real_gid);
1840 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1841 (long int)real_gid, strerror(errno));
1844 rv = setuid(real_uid);
1847 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1848 (long int)real_uid, strerror(errno));
1853 /* If neither the original real uid nor the original euid was root, Exim is
1854 running in an unprivileged state. */
1856 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1858 /* Scan the program's arguments. Some can be dealt with right away; others are
1859 simply recorded for checking and handling afterwards. Do a high-level switch
1860 on the second character (the one after '-'), to save some effort. */
1862 for (i = 1; i < argc; i++)
1864 BOOL badarg = FALSE;
1865 uschar *arg = argv[i];
1869 /* An argument not starting with '-' is the start of a recipients list;
1870 break out of the options-scanning loop. */
1878 /* An option consistion of -- terminates the options */
1880 if (Ustrcmp(arg, "--") == 0)
1882 recipients_arg = i + 1;
1886 /* Handle flagged options */
1888 switchchar = arg[1];
1891 /* Make all -ex options synonymous with -oex arguments, since that
1892 is assumed by various callers. Also make -qR options synonymous with -R
1893 options, as that seems to be required as well. Allow for -qqR too, and
1894 the same for -S options. */
1896 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1897 Ustrncmp(arg+1, "qR", 2) == 0 ||
1898 Ustrncmp(arg+1, "qS", 2) == 0)
1900 switchchar = arg[2];
1903 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1905 switchchar = arg[3];
1907 queue_2stage = TRUE;
1910 /* Make -r synonymous with -f, since it is a documented alias */
1912 else if (arg[1] == 'r') switchchar = 'f';
1914 /* Make -ov synonymous with -v */
1916 else if (Ustrcmp(arg, "-ov") == 0)
1922 /* deal with --option_aliases */
1923 else if (switchchar == '-')
1925 if (Ustrcmp(argrest, "help") == 0)
1927 usage_wanted = TRUE;
1930 else if (Ustrcmp(argrest, "version") == 0)
1937 /* High-level switch on active initial letter */
1942 /* sendmail uses -Ac and -Am to control which .cf file is used;
1945 if (*argrest == '\0') { badarg = TRUE; break; }
1948 BOOL ignore = FALSE;
1953 if (*(argrest + 1) == '\0')
1957 if (!ignore) { badarg = TRUE; break; }
1961 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1962 so has no need of it. */
1965 if (*argrest == 0) i++; /* Skip over the type */
1970 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1972 /* -bd: Run in daemon mode, awaiting SMTP connections.
1973 -bdf: Ditto, but in the foreground.
1976 if (*argrest == 'd')
1978 daemon_listen = TRUE;
1979 if (*(++argrest) == 'f') background_daemon = FALSE;
1980 else if (*argrest != 0) { badarg = TRUE; break; }
1983 /* -be: Run in expansion test mode
1984 -bem: Ditto, but read a message from a file first
1987 else if (*argrest == 'e')
1989 expansion_test = checking = TRUE;
1990 if (argrest[1] == 'm')
1992 if (++i >= argc) { badarg = TRUE; break; }
1993 expansion_test_message = argv[i];
1996 if (argrest[1] != 0) { badarg = TRUE; break; }
1999 /* -bF: Run system filter test */
2001 else if (*argrest == 'F')
2003 filter_test |= FTEST_SYSTEM;
2004 if (*(++argrest) != 0) { badarg = TRUE; break; }
2005 if (++i < argc) filter_test_sfile = argv[i]; else
2007 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2012 /* -bf: Run user filter test
2013 -bfd: Set domain for filter testing
2014 -bfl: Set local part for filter testing
2015 -bfp: Set prefix for filter testing
2016 -bfs: Set suffix for filter testing
2019 else if (*argrest == 'f')
2021 if (*(++argrest) == 0)
2023 filter_test |= FTEST_USER;
2024 if (++i < argc) filter_test_ufile = argv[i]; else
2026 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2034 fprintf(stderr, "exim: string expected after %s\n", arg);
2037 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2038 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2039 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2040 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2041 else { badarg = TRUE; break; }
2045 /* -bh: Host checking - an IP address must follow. */
2047 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2049 if (++i >= argc) { badarg = TRUE; break; }
2050 sender_host_address = argv[i];
2051 host_checking = checking = log_testing_mode = TRUE;
2052 host_checking_callout = argrest[1] == 'c';
2055 /* -bi: This option is used by sendmail to initialize *the* alias file,
2056 though it has the -oA option to specify a different file. Exim has no
2057 concept of *the* alias file, but since Sun's YP make script calls
2058 sendmail this way, some support must be provided. */
2060 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2062 /* -bI: provide information, of the type to follow after a colon.
2063 This is an Exim flag. */
2065 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2067 uschar *p = &argrest[2];
2068 info_flag = CMDINFO_HELP;
2071 if (strcmpic(p, CUS"sieve") == 0)
2073 info_flag = CMDINFO_SIEVE;
2076 else if (strcmpic(p, CUS"dscp") == 0)
2078 info_flag = CMDINFO_DSCP;
2081 else if (strcmpic(p, CUS"help") == 0)
2088 /* -bm: Accept and deliver message - the default option. Reinstate
2089 receiving_message, which got turned off for all -b options. */
2091 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2093 /* -bmalware: test the filename given for malware */
2095 else if (Ustrcmp(argrest, "malware") == 0)
2097 if (++i >= argc) { badarg = TRUE; break; }
2098 malware_test_file = argv[i];
2101 /* -bnq: For locally originating messages, do not qualify unqualified
2102 addresses. In the envelope, this causes errors; in header lines they
2105 else if (Ustrcmp(argrest, "nq") == 0)
2107 allow_unqualified_sender = FALSE;
2108 allow_unqualified_recipient = FALSE;
2111 /* -bpxx: List the contents of the mail queue, in various forms. If
2112 the option is -bpc, just a queue count is needed. Otherwise, if the
2113 first letter after p is r, then order is random. */
2115 else if (*argrest == 'p')
2117 if (*(++argrest) == 'c')
2120 if (*(++argrest) != 0) badarg = TRUE;
2124 if (*argrest == 'r')
2126 list_queue_option = 8;
2129 else list_queue_option = 0;
2133 /* -bp: List the contents of the mail queue, top-level only */
2135 if (*argrest == 0) {}
2137 /* -bpu: List the contents of the mail queue, top-level undelivered */
2139 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2141 /* -bpa: List the contents of the mail queue, including all delivered */
2143 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2145 /* Unknown after -bp[r] */
2155 /* -bP: List the configuration variables given as the address list.
2156 Force -v, so configuration errors get displayed. */
2158 else if (Ustrcmp(argrest, "P") == 0)
2160 /* -bP config: we need to setup here, because later,
2161 * when list_options is checked, the config is read already */
2162 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2165 readconf_save_config(version_string);
2169 list_options = TRUE;
2170 debug_selector |= D_v;
2171 debug_file = stderr;
2175 /* -brt: Test retry configuration lookup */
2177 else if (Ustrcmp(argrest, "rt") == 0)
2179 test_retry_arg = i + 1;
2183 /* -brw: Test rewrite configuration */
2185 else if (Ustrcmp(argrest, "rw") == 0)
2187 test_rewrite_arg = i + 1;
2191 /* -bS: Read SMTP commands on standard input, but produce no replies -
2192 all errors are reported by sending messages. */
2194 else if (Ustrcmp(argrest, "S") == 0)
2195 smtp_input = smtp_batched_input = receiving_message = TRUE;
2197 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2198 on standard output. */
2200 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2202 /* -bt: address testing mode */
2204 else if (Ustrcmp(argrest, "t") == 0)
2205 address_test_mode = checking = log_testing_mode = TRUE;
2207 /* -bv: verify addresses */
2209 else if (Ustrcmp(argrest, "v") == 0)
2210 verify_address_mode = checking = log_testing_mode = TRUE;
2212 /* -bvs: verify sender addresses */
2214 else if (Ustrcmp(argrest, "vs") == 0)
2216 verify_address_mode = checking = log_testing_mode = TRUE;
2217 verify_as_sender = TRUE;
2220 /* -bV: Print version string and support details */
2222 else if (Ustrcmp(argrest, "V") == 0)
2224 printf("Exim version %s #%s built %s\n", version_string,
2225 version_cnumber, version_date);
2226 printf("%s\n", CS version_copyright);
2227 version_printed = TRUE;
2228 show_whats_supported(stdout);
2231 /* -bw: inetd wait mode, accept a listening socket as stdin */
2233 else if (*argrest == 'w')
2235 inetd_wait_mode = TRUE;
2236 background_daemon = FALSE;
2237 daemon_listen = TRUE;
2238 if (*(++argrest) != '\0')
2240 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2241 if (inetd_wait_timeout <= 0)
2243 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2253 /* -C: change configuration file list; ignore if it isn't really
2254 a change! Enforce a prefix check if required. */
2259 if(++i < argc) argrest = argv[i]; else
2260 { badarg = TRUE; break; }
2262 if (Ustrcmp(config_main_filelist, argrest) != 0)
2264 #ifdef ALT_CONFIG_PREFIX
2266 int len = Ustrlen(ALT_CONFIG_PREFIX);
2267 uschar *list = argrest;
2269 while((filename = string_nextinlist(&list, &sep, big_buffer,
2270 big_buffer_size)) != NULL)
2272 if ((Ustrlen(filename) < len ||
2273 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2274 Ustrstr(filename, "/../") != NULL) &&
2275 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2277 fprintf(stderr, "-C Permission denied\n");
2282 if (real_uid != root_uid)
2284 #ifdef TRUSTED_CONFIG_LIST
2286 if (real_uid != exim_uid
2287 #ifdef CONFIGURE_OWNER
2288 && real_uid != config_uid
2291 trusted_config = FALSE;
2294 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2297 struct stat statbuf;
2299 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2300 (statbuf.st_uid != root_uid /* owner not root */
2301 #ifdef CONFIGURE_OWNER
2302 && statbuf.st_uid != config_uid /* owner not the special one */
2305 (statbuf.st_gid != root_gid /* group not root */
2306 #ifdef CONFIGURE_GROUP
2307 && statbuf.st_gid != config_gid /* group not the special one */
2309 && (statbuf.st_mode & 020) != 0 /* group writeable */
2311 (statbuf.st_mode & 2) != 0) /* world writeable */
2313 trusted_config = FALSE;
2318 /* Well, the trust list at least is up to scratch... */
2319 void *reset_point = store_get(0);
2320 uschar *trusted_configs[32];
2324 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2326 uschar *start = big_buffer, *nl;
2327 while (*start && isspace(*start))
2331 nl = Ustrchr(start, '\n');
2334 trusted_configs[nr_configs++] = string_copy(start);
2335 if (nr_configs == 32)
2343 const uschar *list = argrest;
2345 while (trusted_config && (filename = string_nextinlist(&list,
2346 &sep, big_buffer, big_buffer_size)) != NULL)
2348 for (i=0; i < nr_configs; i++)
2350 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2353 if (i == nr_configs)
2355 trusted_config = FALSE;
2359 store_reset(reset_point);
2363 /* No valid prefixes found in trust_list file. */
2364 trusted_config = FALSE;
2370 /* Could not open trust_list file. */
2371 trusted_config = FALSE;
2375 /* Not root; don't trust config */
2376 trusted_config = FALSE;
2380 config_main_filelist = argrest;
2381 config_changed = TRUE;
2386 /* -D: set up a macro definition */
2389 #ifdef DISABLE_D_OPTION
2390 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2395 macro_item *mlast = NULL;
2398 uschar *s = argrest;
2400 while (isspace(*s)) s++;
2402 if (*s < 'A' || *s > 'Z')
2404 fprintf(stderr, "exim: macro name set by -D must start with "
2405 "an upper case letter\n");
2409 while (isalnum(*s) || *s == '_')
2411 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2415 if (ptr == 0) { badarg = TRUE; break; }
2416 while (isspace(*s)) s++;
2419 if (*s++ != '=') { badarg = TRUE; break; }
2420 while (isspace(*s)) s++;
2423 for (m = macros; m != NULL; m = m->next)
2425 if (Ustrcmp(m->name, name) == 0)
2427 fprintf(stderr, "exim: duplicated -D in command line\n");
2433 m = store_get(sizeof(macro_item) + Ustrlen(name));
2435 m->command_line = TRUE;
2436 if (mlast == NULL) macros = m; else mlast->next = m;
2437 Ustrcpy(m->name, name);
2438 m->replacement = string_copy(s);
2440 if (clmacro_count >= MAX_CLMACROS)
2442 fprintf(stderr, "exim: too many -D options on command line\n");
2445 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2451 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2452 The latter is now a no-op, retained for compatibility only. If -dd is used,
2453 debugging subprocesses of the daemon is disabled. */
2456 if (Ustrcmp(argrest, "ropcr") == 0)
2458 /* drop_cr = TRUE; */
2461 /* Use an intermediate variable so that we don't set debugging while
2462 decoding the debugging bits. */
2466 unsigned int selector = D_default;
2469 if (*argrest == 'd')
2471 debug_daemon = TRUE;
2475 decode_bits(&selector, 1, debug_notall, argrest,
2476 debug_options, debug_options_count, US"debug", 0);
2477 debug_selector = selector;
2482 /* -E: This is a local error message. This option is not intended for
2483 external use at all, but is not restricted to trusted callers because it
2484 does no harm (just suppresses certain error messages) and if Exim is run
2485 not setuid root it won't always be trusted when it generates error
2486 messages using this option. If there is a message id following -E, point
2487 message_reference at it, for logging. */
2490 local_error_message = TRUE;
2491 if (mac_ismsgid(argrest)) message_reference = argrest;
2495 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2496 option, so it looks as if historically the -oex options are also callable
2497 without the leading -o. So we have to accept them. Before the switch,
2498 anything starting -oe has been converted to -e. Exim does not support all
2499 of the sendmail error options. */
2502 if (Ustrcmp(argrest, "e") == 0)
2504 arg_error_handling = ERRORS_SENDER;
2505 errors_sender_rc = EXIT_SUCCESS;
2507 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2508 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2509 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2510 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2515 /* -F: Set sender's full name, used instead of the gecos entry from
2516 the password file. Since users can usually alter their gecos entries,
2517 there's no security involved in using this instead. The data can follow
2518 the -F or be in the next argument. */
2523 if(++i < argc) argrest = argv[i]; else
2524 { badarg = TRUE; break; }
2526 originator_name = argrest;
2527 sender_name_forced = TRUE;
2531 /* -f: Set sender's address - this value is only actually used if Exim is
2532 run by a trusted user, or if untrusted_set_sender is set and matches the
2533 address, except that the null address can always be set by any user. The
2534 test for this happens later, when the value given here is ignored when not
2535 permitted. For an untrusted user, the actual sender is still put in Sender:
2536 if it doesn't match the From: header (unless no_local_from_check is set).
2537 The data can follow the -f or be in the next argument. The -r switch is an
2538 obsolete form of -f but since there appear to be programs out there that
2539 use anything that sendmail has ever supported, better accept it - the
2540 synonymizing is done before the switch above.
2542 At this stage, we must allow domain literal addresses, because we don't
2543 know what the setting of allow_domain_literals is yet. Ditto for trailing
2544 dots and strip_trailing_dot. */
2548 int dummy_start, dummy_end;
2552 if (i+1 < argc) argrest = argv[++i]; else
2553 { badarg = TRUE; break; }
2556 sender_address = string_sprintf(""); /* Ensure writeable memory */
2559 uschar *temp = argrest + Ustrlen(argrest) - 1;
2560 while (temp >= argrest && isspace(*temp)) temp--;
2561 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2562 allow_domain_literals = TRUE;
2563 strip_trailing_dot = TRUE;
2564 #ifdef EXPERIMENTAL_INTERNATIONAL
2565 allow_utf8_domains = TRUE;
2567 sender_address = parse_extract_address(argrest, &errmess,
2568 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2569 #ifdef EXPERIMENTAL_INTERNATIONAL
2570 message_smtputf8 = string_is_utf8(sender_address);
2571 allow_utf8_domains = FALSE;
2573 allow_domain_literals = FALSE;
2574 strip_trailing_dot = FALSE;
2575 if (sender_address == NULL)
2577 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2578 return EXIT_FAILURE;
2581 sender_address_forced = TRUE;
2585 /* -G: sendmail invocation to specify that it's a gateway submission and
2586 sendmail may complain about problems instead of fixing them.
2587 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2588 not at this time complain about problems. */
2594 /* -h: Set the hop count for an incoming message. Exim does not currently
2595 support this; it always computes it by counting the Received: headers.
2596 To put it in will require a change to the spool header file format. */
2601 if(++i < argc) argrest = argv[i]; else
2602 { badarg = TRUE; break; }
2604 if (!isdigit(*argrest)) badarg = TRUE;
2608 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2609 not to be documented for sendmail but mailx (at least) uses it) */
2612 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2616 /* -L: set the identifier used for syslog; equivalent to setting
2617 syslog_processname in the config file, but needs to be an admin option. */
2620 if (*argrest == '\0')
2622 if(++i < argc) argrest = argv[i]; else
2623 { badarg = TRUE; break; }
2625 sz = Ustrlen(argrest);
2628 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2629 return EXIT_FAILURE;
2633 fprintf(stderr, "exim: the -L syslog name is too short\n");
2634 return EXIT_FAILURE;
2636 cmdline_syslog_name = argrest;
2640 receiving_message = FALSE;
2642 /* -MC: continue delivery of another message via an existing open
2643 file descriptor. This option is used for an internal call by the
2644 smtp transport when there is a pending message waiting to go to an
2645 address to which it has got a connection. Five subsequent arguments are
2646 required: transport name, host name, IP address, sequence number, and
2647 message_id. Transports may decline to create new processes if the sequence
2648 number gets too big. The channel is stdin. This (-MC) must be the last
2649 argument. There's a subsequent check that the real-uid is privileged.
2651 If we are running in the test harness. delay for a bit, to let the process
2652 that set this one up complete. This makes for repeatability of the logging,
2655 if (Ustrcmp(argrest, "C") == 0)
2657 union sockaddr_46 interface_sock;
2658 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2662 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2663 return EXIT_FAILURE;
2666 if (msg_action_arg >= 0)
2668 fprintf(stderr, "exim: incompatible arguments\n");
2669 return EXIT_FAILURE;
2672 continue_transport = argv[++i];
2673 continue_hostname = argv[++i];
2674 continue_host_address = argv[++i];
2675 continue_sequence = Uatoi(argv[++i]);
2676 msg_action = MSG_DELIVER;
2677 msg_action_arg = ++i;
2678 forced_delivery = TRUE;
2679 queue_run_pid = passed_qr_pid;
2680 queue_run_pipe = passed_qr_pipe;
2682 if (!mac_ismsgid(argv[i]))
2684 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2686 return EXIT_FAILURE;
2689 /* Set up $sending_ip_address and $sending_port */
2691 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2693 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2697 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2699 return EXIT_FAILURE;
2702 if (running_in_test_harness) millisleep(500);
2706 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2707 precedes -MC (see above). The flag indicates that the host to which
2708 Exim is connected has accepted an AUTH sequence. */
2710 else if (Ustrcmp(argrest, "CA") == 0)
2712 smtp_authenticated = TRUE;
2716 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2717 that exim is connected to supports the esmtp extension DSN */
2718 else if (Ustrcmp(argrest, "CD") == 0)
2720 smtp_use_dsn = TRUE;
2724 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2725 it preceded -MC (see above) */
2727 else if (Ustrcmp(argrest, "CP") == 0)
2729 smtp_use_pipelining = TRUE;
2733 /* -MCQ: pass on the pid of the queue-running process that started
2734 this chain of deliveries and the fd of its synchronizing pipe; this
2735 is useful only when it precedes -MC (see above) */
2737 else if (Ustrcmp(argrest, "CQ") == 0)
2739 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2741 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2746 /* -MCS: set the smtp_use_size flag; this is useful only when it
2747 precedes -MC (see above) */
2749 else if (Ustrcmp(argrest, "CS") == 0)
2751 smtp_use_size = TRUE;
2755 /* -MCT: set the tls_offered flag; this is useful only when it
2756 precedes -MC (see above). The flag indicates that the host to which
2757 Exim is connected has offered TLS support. */
2760 else if (Ustrcmp(argrest, "CT") == 0)
2767 /* -M[x]: various operations on the following list of message ids:
2768 -M deliver the messages, ignoring next retry times and thawing
2769 -Mc deliver the messages, checking next retry times, no thawing
2770 -Mf freeze the messages
2771 -Mg give up on the messages
2772 -Mt thaw the messages
2773 -Mrm remove the messages
2774 In the above cases, this must be the last option. There are also the
2775 following options which are followed by a single message id, and which
2776 act on that message. Some of them use the "recipient" addresses as well.
2777 -Mar add recipient(s)
2778 -Mmad mark all recipients delivered
2779 -Mmd mark recipients(s) delivered
2781 -Mset load a message for use with -be
2783 -Mvc show copy (of whole message, in RFC 2822 format)
2788 else if (*argrest == 0)
2790 msg_action = MSG_DELIVER;
2791 forced_delivery = deliver_force_thaw = TRUE;
2793 else if (Ustrcmp(argrest, "ar") == 0)
2795 msg_action = MSG_ADD_RECIPIENT;
2796 one_msg_action = TRUE;
2798 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2799 else if (Ustrcmp(argrest, "es") == 0)
2801 msg_action = MSG_EDIT_SENDER;
2802 one_msg_action = TRUE;
2804 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2805 else if (Ustrcmp(argrest, "g") == 0)
2807 msg_action = MSG_DELIVER;
2808 deliver_give_up = TRUE;
2810 else if (Ustrcmp(argrest, "mad") == 0)
2812 msg_action = MSG_MARK_ALL_DELIVERED;
2814 else if (Ustrcmp(argrest, "md") == 0)
2816 msg_action = MSG_MARK_DELIVERED;
2817 one_msg_action = TRUE;
2819 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2820 else if (Ustrcmp(argrest, "set") == 0)
2822 msg_action = MSG_LOAD;
2823 one_msg_action = TRUE;
2825 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2826 else if (Ustrcmp(argrest, "vb") == 0)
2828 msg_action = MSG_SHOW_BODY;
2829 one_msg_action = TRUE;
2831 else if (Ustrcmp(argrest, "vc") == 0)
2833 msg_action = MSG_SHOW_COPY;
2834 one_msg_action = TRUE;
2836 else if (Ustrcmp(argrest, "vh") == 0)
2838 msg_action = MSG_SHOW_HEADER;
2839 one_msg_action = TRUE;
2841 else if (Ustrcmp(argrest, "vl") == 0)
2843 msg_action = MSG_SHOW_LOG;
2844 one_msg_action = TRUE;
2846 else { badarg = TRUE; break; }
2848 /* All the -Mxx options require at least one message id. */
2850 msg_action_arg = i + 1;
2851 if (msg_action_arg >= argc)
2853 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2854 return EXIT_FAILURE;
2857 /* Some require only message ids to follow */
2859 if (!one_msg_action)
2862 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2864 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2866 return EXIT_FAILURE;
2868 goto END_ARG; /* Remaining args are ids */
2871 /* Others require only one message id, possibly followed by addresses,
2872 which will be handled as normal arguments. */
2876 if (!mac_ismsgid(argv[msg_action_arg]))
2878 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2879 argv[msg_action_arg], arg);
2880 return EXIT_FAILURE;
2887 /* Some programs seem to call the -om option without the leading o;
2888 for sendmail it askes for "me too". Exim always does this. */
2891 if (*argrest != 0) badarg = TRUE;
2895 /* -N: don't do delivery - a debugging option that stops transports doing
2896 their thing. It implies debugging at the D_v level. */
2901 dont_deliver = TRUE;
2902 debug_selector |= D_v;
2903 debug_file = stderr;
2909 /* -n: This means "don't alias" in sendmail, apparently.
2910 For normal invocations, it has no effect.
2911 It may affect some other options. */
2917 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2918 option to the specified value. This form uses long names. We need to handle
2919 -O option=value and -Ooption=value. */
2926 fprintf(stderr, "exim: string expected after -O\n");
2934 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2937 if (*argrest == 'A')
2939 alias_arg = argrest + 1;
2940 if (alias_arg[0] == 0)
2942 if (i+1 < argc) alias_arg = argv[++i]; else
2944 fprintf(stderr, "exim: string expected after -oA\n");
2950 /* -oB: Set a connection message max value for remote deliveries */
2952 else if (*argrest == 'B')
2954 uschar *p = argrest + 1;
2957 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2959 connection_max_messages = 1;
2968 fprintf(stderr, "exim: number expected after -oB\n");
2971 connection_max_messages = Uatoi(p);
2975 /* -odb: background delivery */
2977 else if (Ustrcmp(argrest, "db") == 0)
2979 synchronous_delivery = FALSE;
2980 arg_queue_only = FALSE;
2981 queue_only_set = TRUE;
2984 /* -odf: foreground delivery (smail-compatible option); same effect as
2985 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2988 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2990 synchronous_delivery = TRUE;
2991 arg_queue_only = FALSE;
2992 queue_only_set = TRUE;
2995 /* -odq: queue only */
2997 else if (Ustrcmp(argrest, "dq") == 0)
2999 synchronous_delivery = FALSE;
3000 arg_queue_only = TRUE;
3001 queue_only_set = TRUE;
3004 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3005 but no remote delivery */
3007 else if (Ustrcmp(argrest, "dqs") == 0)
3010 arg_queue_only = FALSE;
3011 queue_only_set = TRUE;
3014 /* -oex: Sendmail error flags. As these are also accepted without the
3015 leading -o prefix, for compatibility with vacation and other callers,
3016 they are handled with -e above. */
3018 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3019 -oitrue: Another sendmail syntax for the same */
3021 else if (Ustrcmp(argrest, "i") == 0 ||
3022 Ustrcmp(argrest, "itrue") == 0)
3025 /* -oM*: Set various characteristics for an incoming message; actually
3026 acted on for trusted callers only. */
3028 else if (*argrest == 'M')
3032 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3036 /* -oMa: Set sender host address */
3038 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3040 /* -oMaa: Set authenticator name */
3042 else if (Ustrcmp(argrest, "Maa") == 0)
3043 sender_host_authenticated = argv[++i];
3045 /* -oMas: setting authenticated sender */
3047 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3049 /* -oMai: setting authenticated id */
3051 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3053 /* -oMi: Set incoming interface address */
3055 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3057 /* -oMm: Message reference */
3059 else if (Ustrcmp(argrest, "Mm") == 0)
3061 if (!mac_ismsgid(argv[i+1]))
3063 fprintf(stderr,"-oMm must be a valid message ID\n");
3066 if (!trusted_config)
3068 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3071 message_reference = argv[++i];
3074 /* -oMr: Received protocol */
3076 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3078 /* -oMs: Set sender host name */
3080 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3082 /* -oMt: Set sender ident */
3084 else if (Ustrcmp(argrest, "Mt") == 0)
3086 sender_ident_set = TRUE;
3087 sender_ident = argv[++i];
3090 /* Else a bad argument */
3099 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3100 seem to call this as -m (undocumented), so that is also accepted (see
3103 else if (Ustrcmp(argrest, "m") == 0) {}
3105 /* -oo: An ancient flag for old-style addresses which still seems to
3106 crop up in some calls (see in SCO). */
3108 else if (Ustrcmp(argrest, "o") == 0) {}
3110 /* -oP <name>: set pid file path for daemon */
3112 else if (Ustrcmp(argrest, "P") == 0)
3113 override_pid_file_path = argv[++i];
3115 /* -or <n>: set timeout for non-SMTP acceptance
3116 -os <n>: set timeout for SMTP acceptance */
3118 else if (*argrest == 'r' || *argrest == 's')
3120 int *tp = (*argrest == 'r')?
3121 &arg_receive_timeout : &arg_smtp_receive_timeout;
3122 if (argrest[1] == 0)
3124 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3126 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3129 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3134 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3136 else if (Ustrcmp(argrest, "X") == 0)
3137 override_local_interfaces = argv[++i];
3139 /* Unknown -o argument */
3145 /* -ps: force Perl startup; -pd force delayed Perl startup */
3149 if (*argrest == 's' && argrest[1] == 0)
3151 perl_start_option = 1;
3154 if (*argrest == 'd' && argrest[1] == 0)
3156 perl_start_option = -1;
3161 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3162 which sets the host protocol and host name */
3166 if (i+1 < argc) argrest = argv[++i]; else
3167 { badarg = TRUE; break; }
3172 uschar *hn = Ustrchr(argrest, ':');
3175 received_protocol = argrest;
3179 received_protocol = string_copyn(argrest, hn - argrest);
3180 sender_host_name = hn + 1;
3187 receiving_message = FALSE;
3188 if (queue_interval >= 0)
3190 fprintf(stderr, "exim: -q specified more than once\n");
3194 /* -qq...: Do queue runs in a 2-stage manner */
3196 if (*argrest == 'q')
3198 queue_2stage = TRUE;
3202 /* -qi...: Do only first (initial) deliveries */
3204 if (*argrest == 'i')
3206 queue_run_first_delivery = TRUE;
3210 /* -qf...: Run the queue, forcing deliveries
3211 -qff..: Ditto, forcing thawing as well */
3213 if (*argrest == 'f')
3215 queue_run_force = TRUE;
3216 if (*(++argrest) == 'f')
3218 deliver_force_thaw = TRUE;
3223 /* -q[f][f]l...: Run the queue only on local deliveries */
3225 if (*argrest == 'l')
3227 queue_run_local = TRUE;
3231 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3232 optionally starting from a given message id. */
3234 if (*argrest == 0 &&
3235 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3238 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3239 start_queue_run_id = argv[++i];
3240 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3241 stop_queue_run_id = argv[++i];
3244 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3245 optionally local only. */
3250 queue_interval = readconf_readtime(argrest, 0, FALSE);
3252 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3253 if (queue_interval <= 0)
3255 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3262 case 'R': /* Synonymous with -qR... */
3263 receiving_message = FALSE;
3265 /* -Rf: As -R (below) but force all deliveries,
3266 -Rff: Ditto, but also thaw all frozen messages,
3267 -Rr: String is regex
3268 -Rrf: Regex and force
3269 -Rrff: Regex and force and thaw
3271 in all cases provided there are no further characters in this
3277 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3279 if (Ustrcmp(argrest, rsopts[i]) == 0)
3281 if (i != 2) queue_run_force = TRUE;
3282 if (i >= 2) deliver_selectstring_regex = TRUE;
3283 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3284 argrest += Ustrlen(rsopts[i]);
3289 /* -R: Set string to match in addresses for forced queue run to
3290 pick out particular messages. */
3294 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3296 fprintf(stderr, "exim: string expected after -R\n");
3300 else deliver_selectstring = argrest;
3304 /* -r: an obsolete synonym for -f (see above) */
3307 /* -S: Like -R but works on sender. */
3309 case 'S': /* Synonymous with -qS... */
3310 receiving_message = FALSE;
3312 /* -Sf: As -S (below) but force all deliveries,
3313 -Sff: Ditto, but also thaw all frozen messages,
3314 -Sr: String is regex
3315 -Srf: Regex and force
3316 -Srff: Regex and force and thaw
3318 in all cases provided there are no further characters in this
3324 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3326 if (Ustrcmp(argrest, rsopts[i]) == 0)
3328 if (i != 2) queue_run_force = TRUE;
3329 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3330 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3331 argrest += Ustrlen(rsopts[i]);
3336 /* -S: Set string to match in addresses for forced queue run to
3337 pick out particular messages. */
3341 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3343 fprintf(stderr, "exim: string expected after -S\n");
3347 else deliver_selectstring_sender = argrest;
3350 /* -Tqt is an option that is exclusively for use by the testing suite.
3351 It is not recognized in other circumstances. It allows for the setting up
3352 of explicit "queue times" so that various warning/retry things can be
3353 tested. Otherwise variability of clock ticks etc. cause problems. */
3356 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3357 fudged_queue_times = argv[++i];
3362 /* -t: Set flag to extract recipients from body of message. */
3365 if (*argrest == 0) extract_recipients = TRUE;
3367 /* -ti: Set flag to extract recipients from body of message, and also
3368 specify that dot does not end the message. */
3370 else if (Ustrcmp(argrest, "i") == 0)
3372 extract_recipients = TRUE;
3376 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3379 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3386 /* -U: This means "initial user submission" in sendmail, apparently. The
3387 doc claims that in future sendmail may refuse syntactically invalid
3388 messages instead of fixing them. For the moment, we just ignore it. */
3394 /* -v: verify things - this is a very low-level debugging */
3399 debug_selector |= D_v;
3400 debug_file = stderr;
3406 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3408 The -x flag tells the sendmail command that mail from a local
3409 mail program has National Language Support (NLS) extended characters
3410 in the body of the mail item. The sendmail command can send mail with
3411 extended NLS characters across networks that normally corrupts these
3414 As Exim is 8-bit clean, it just ignores this flag. */
3417 if (*argrest != 0) badarg = TRUE;
3420 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3421 logs to that file. We swallow the parameter and otherwise ignore it. */
3424 if (*argrest == '\0')
3427 fprintf(stderr, "exim: string expected after -X\n");
3433 if (*argrest == '\0')
3434 if (++i < argc) log_oneline = argv[i]; else
3436 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3441 /* All other initial characters are errors */
3446 } /* End of high-level switch statement */
3448 /* Failed to recognize the option, or syntax error */
3452 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3453 "option %s\n", arg);
3459 /* If -R or -S have been specified without -q, assume a single queue run. */
3461 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3462 queue_interval < 0) queue_interval = 0;
3466 /* If usage_wanted is set we call the usage function - which never returns */
3467 if (usage_wanted) exim_usage(called_as);
3469 /* Arguments have been processed. Check for incompatibilities. */
3471 (smtp_input || extract_recipients || recipients_arg < argc) &&
3472 (daemon_listen || queue_interval >= 0 || bi_option ||
3473 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3474 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3477 msg_action_arg > 0 &&
3478 (daemon_listen || queue_interval >= 0 || list_options ||
3479 (checking && msg_action != MSG_LOAD) ||
3480 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3483 (daemon_listen || queue_interval >= 0) &&
3484 (sender_address != NULL || list_options || list_queue || checking ||
3488 daemon_listen && queue_interval == 0
3491 inetd_wait_mode && queue_interval >= 0
3495 (checking || smtp_input || extract_recipients ||
3496 filter_test != FTEST_NONE || bi_option)
3499 verify_address_mode &&
3500 (address_test_mode || smtp_input || extract_recipients ||
3501 filter_test != FTEST_NONE || bi_option)
3504 address_test_mode && (smtp_input || extract_recipients ||
3505 filter_test != FTEST_NONE || bi_option)
3508 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3512 deliver_selectstring != NULL && queue_interval < 0
3515 msg_action == MSG_LOAD &&
3516 (!expansion_test || expansion_test_message != NULL)
3520 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3524 /* If debugging is set up, set the file and the file descriptor to pass on to
3525 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3526 to run in the foreground. */
3528 if (debug_selector != 0)
3530 debug_file = stderr;
3531 debug_fd = fileno(debug_file);
3532 background_daemon = FALSE;
3533 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3534 if (debug_selector != D_v) /* -v only doesn't show this */
3536 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3537 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3539 if (!version_printed)
3540 show_whats_supported(stderr);
3544 /* When started with root privilege, ensure that the limits on the number of
3545 open files and the number of processes (where that is accessible) are
3546 sufficiently large, or are unset, in case Exim has been called from an
3547 environment where the limits are screwed down. Not all OS have the ability to
3548 change some of these limits. */
3552 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3558 #ifdef RLIMIT_NOFILE
3559 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3561 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3563 rlp.rlim_cur = rlp.rlim_max = 0;
3566 /* I originally chose 1000 as a nice big number that was unlikely to
3567 be exceeded. It turns out that some older OS have a fixed upper limit of
3570 if (rlp.rlim_cur < 1000)
3572 rlp.rlim_cur = rlp.rlim_max = 1000;
3573 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3575 rlp.rlim_cur = rlp.rlim_max = 256;
3576 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3577 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3584 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3586 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3588 rlp.rlim_cur = rlp.rlim_max = 0;
3591 #ifdef RLIM_INFINITY
3592 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3594 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3596 if (rlp.rlim_cur < 1000)
3598 rlp.rlim_cur = rlp.rlim_max = 1000;
3600 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3601 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3607 /* Exim is normally entered as root (but some special configurations are
3608 possible that don't do this). However, it always spins off sub-processes that
3609 set their uid and gid as required for local delivery. We don't want to pass on
3610 any extra groups that root may belong to, so we want to get rid of them all at
3613 We need to obey setgroups() at this stage, before possibly giving up root
3614 privilege for a changed configuration file, but later on we might need to
3615 check on the additional groups for the admin user privilege - can't do that
3616 till after reading the config, which might specify the exim gid. Therefore,
3617 save the group list here first. */
3619 group_count = getgroups(NGROUPS_MAX, group_list);
3620 if (group_count < 0)
3622 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3626 /* There is a fundamental difference in some BSD systems in the matter of
3627 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3628 known not to be different. On the "different" systems there is a single group
3629 list, and the first entry in it is the current group. On all other versions of
3630 Unix there is a supplementary group list, which is in *addition* to the current
3631 group. Consequently, to get rid of all extraneous groups on a "standard" system
3632 you pass over 0 groups to setgroups(), while on a "different" system you pass
3633 over a single group - the current group, which is always the first group in the
3634 list. Calling setgroups() with zero groups on a "different" system results in
3635 an error return. The following code should cope with both types of system.
3637 However, if this process isn't running as root, setgroups() can't be used
3638 since you have to be root to run it, even if throwing away groups. Not being
3639 root here happens only in some unusual configurations. We just ignore the
3642 if (setgroups(0, NULL) != 0)
3644 if (setgroups(1, group_list) != 0 && !unprivileged)
3646 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3651 /* If the configuration file name has been altered by an argument on the
3652 command line (either a new file name or a macro definition) and the caller is
3653 not root, or if this is a filter testing run, remove any setuid privilege the
3654 program has and run as the underlying user.
3656 The exim user is locked out of this, which severely restricts the use of -C
3659 Otherwise, set the real ids to the effective values (should be root unless run
3660 from inetd, which it can either be root or the exim uid, if one is configured).
3662 There is a private mechanism for bypassing some of this, in order to make it
3663 possible to test lots of configurations automatically, without having either to
3664 recompile each time, or to patch in an actual configuration file name and other
3665 values (such as the path name). If running in the test harness, pretend that
3666 configuration file changes and macro definitions haven't happened. */
3669 (!trusted_config || /* Config changed, or */
3670 !macros_trusted()) && /* impermissible macros and */
3671 real_uid != root_uid && /* Not root, and */
3672 !running_in_test_harness /* Not fudged */
3674 expansion_test /* expansion testing */
3676 filter_test != FTEST_NONE) /* Filter testing */
3678 setgroups(group_count, group_list);
3679 exim_setugid(real_uid, real_gid, FALSE,
3680 US"-C, -D, -be or -bf forces real uid");
3681 removed_privilege = TRUE;
3683 /* In the normal case when Exim is called like this, stderr is available
3684 and should be used for any logging information because attempts to write
3685 to the log will usually fail. To arrange this, we unset really_exim. However,
3686 if no stderr is available there is no point - we might as well have a go
3687 at the log (if it fails, syslog will be written).
3689 Note that if the invoker is Exim, the logs remain available. Messing with
3690 this causes unlogged successful deliveries. */
3692 if ((log_stderr != NULL) && (real_uid != exim_uid))
3693 really_exim = FALSE;
3696 /* Privilege is to be retained for the moment. It may be dropped later,
3697 depending on the job that this Exim process has been asked to do. For now, set
3698 the real uid to the effective so that subsequent re-execs of Exim are done by a
3701 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3703 /* If testing a filter, open the file(s) now, before wasting time doing other
3704 setups and reading the message. */
3706 if ((filter_test & FTEST_SYSTEM) != 0)
3708 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3711 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3713 return EXIT_FAILURE;
3717 if ((filter_test & FTEST_USER) != 0)
3719 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3722 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3724 return EXIT_FAILURE;
3728 /* Initialise lookup_list
3729 If debugging, already called above via version reporting.
3730 In either case, we initialise the list of available lookups while running
3731 as root. All dynamically modules are loaded from a directory which is
3732 hard-coded into the binary and is code which, if not a module, would be
3733 part of Exim already. Ability to modify the content of the directory
3734 is equivalent to the ability to modify a setuid binary!
3736 This needs to happen before we read the main configuration. */
3739 #ifdef EXPERIMENTAL_INTERNATIONAL
3740 if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3743 /* Read the main runtime configuration data; this gives up if there
3744 is a failure. It leaves the configuration file open so that the subsequent
3745 configuration data for delivery can be read if needed. */
3749 /* If an action on specific messages is requested, or if a daemon or queue
3750 runner is being started, we need to know if Exim was called by an admin user.
3751 This is the case if the real user is root or exim, or if the real group is
3752 exim, or if one of the supplementary groups is exim or a group listed in
3753 admin_groups. We don't fail all message actions immediately if not admin_user,
3754 since some actions can be performed by non-admin users. Instead, set admin_user
3755 for later interrogation. */
3757 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3762 for (i = 0; i < group_count; i++)
3764 if (group_list[i] == exim_gid) admin_user = TRUE;
3765 else if (admin_groups != NULL)
3767 for (j = 1; j <= (int)(admin_groups[0]); j++)
3768 if (admin_groups[j] == group_list[i])
3769 { admin_user = TRUE; break; }
3771 if (admin_user) break;
3775 /* Another group of privileged users are the trusted users. These are root,
3776 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3777 are permitted to specify sender_addresses with -f on the command line, and
3778 other message parameters as well. */
3780 if (real_uid == root_uid || real_uid == exim_uid)
3781 trusted_caller = TRUE;
3786 if (trusted_users != NULL)
3788 for (i = 1; i <= (int)(trusted_users[0]); i++)
3789 if (trusted_users[i] == real_uid)
3790 { trusted_caller = TRUE; break; }
3793 if (!trusted_caller && trusted_groups != NULL)
3795 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3797 if (trusted_groups[i] == real_gid)
3798 trusted_caller = TRUE;
3799 else for (j = 0; j < group_count; j++)
3801 if (trusted_groups[i] == group_list[j])
3802 { trusted_caller = TRUE; break; }
3804 if (trusted_caller) break;
3809 /* Handle the decoding of logging options. */
3811 decode_bits(log_selector, log_selector_size, log_notall,
3812 log_selector_string, log_options, log_options_count, US"log", 0);
3817 debug_printf("configuration file is %s\n", config_main_filename);
3818 debug_printf("log selectors =");
3819 for (i = 0; i < log_selector_size; i++)
3820 debug_printf(" %08x", log_selector[i]);
3824 /* If domain literals are not allowed, check the sender address that was
3825 supplied with -f. Ditto for a stripped trailing dot. */
3827 if (sender_address != NULL)
3829 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3831 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3832 "allowed\n", sender_address);
3833 return EXIT_FAILURE;
3835 if (f_end_dot && !strip_trailing_dot)
3837 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3838 "(trailing dot not allowed)\n", sender_address);
3839 return EXIT_FAILURE;
3843 /* See if an admin user overrode our logging. */
3845 if (cmdline_syslog_name != NULL)
3849 syslog_processname = cmdline_syslog_name;
3850 log_file_path = string_copy(CUS"syslog");
3854 /* not a panic, non-privileged users should not be able to spam paniclog */
3856 "exim: you lack sufficient privilege to specify syslog process name\n");
3857 return EXIT_FAILURE;
3861 /* Paranoia check of maximum lengths of certain strings. There is a check
3862 on the length of the log file path in log.c, which will come into effect
3863 if there are any calls to write the log earlier than this. However, if we
3864 get this far but the string is very long, it is better to stop now than to
3865 carry on and (e.g.) receive a message and then have to collapse. The call to
3866 log_write() from here will cause the ultimate panic collapse if the complete
3867 file name exceeds the buffer length. */
3869 if (Ustrlen(log_file_path) > 200)
3870 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3871 "log_file_path is longer than 200 chars: aborting");
3873 if (Ustrlen(pid_file_path) > 200)
3874 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3875 "pid_file_path is longer than 200 chars: aborting");
3877 if (Ustrlen(spool_directory) > 200)
3878 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3879 "spool_directory is longer than 200 chars: aborting");
3881 /* Length check on the process name given to syslog for its TAG field,
3882 which is only permitted to be 32 characters or less. See RFC 3164. */
3884 if (Ustrlen(syslog_processname) > 32)
3885 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3886 "syslog_processname is longer than 32 chars: aborting");
3892 log_write(0, LOG_MAIN, "%s", log_oneline);
3893 return EXIT_SUCCESS;
3896 return EXIT_FAILURE;
3899 /* In some operating systems, the environment variable TMPDIR controls where
3900 temporary files are created; Exim doesn't use these (apart from when delivering
3901 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3902 If TMPDIR is found in the environment, reset it to the value defined in the
3903 TMPDIR macro, if this macro is defined. */
3908 for (p = USS environ; *p != NULL; p++)
3910 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3911 Ustrcmp(*p+7, TMPDIR) != 0)
3913 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3914 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3916 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3922 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3923 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3924 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3925 called by a user who has set the TZ variable. This then affects the timestamps
3926 in log files and in Received: headers, and any created Date: header lines. The
3927 required timezone is settable in the configuration file, so nothing can be done
3928 about this earlier - but hopefully nothing will normally be logged earlier than
3929 this. We have to make a new environment if TZ is wrong, but don't bother if
3930 timestamps_utc is set, because then all times are in UTC anyway. */
3932 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3934 timestamps_utc = TRUE;
3938 uschar *envtz = US getenv("TZ");
3939 if ((envtz == NULL && timezone_string != NULL) ||
3941 (timezone_string == NULL ||
3942 Ustrcmp(timezone_string, envtz) != 0)))
3944 uschar **p = USS environ;
3948 while (*p++ != NULL) count++;
3949 if (envtz == NULL) count++;
3950 newp = new = malloc(sizeof(uschar *) * (count + 1));
3951 for (p = USS environ; *p != NULL; p++)
3953 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3956 if (timezone_string != NULL)
3958 *newp = malloc(Ustrlen(timezone_string) + 4);
3959 sprintf(CS *newp++, "TZ=%s", timezone_string);
3964 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3965 tod_stamp(tod_log));
3969 /* Handle the case when we have removed the setuid privilege because of -C or
3970 -D. This means that the caller of Exim was not root.
3972 There is a problem if we were running as the Exim user. The sysadmin may
3973 expect this case to retain privilege because "the binary was called by the
3974 Exim user", but it hasn't, because either the -D option set macros, or the
3975 -C option set a non-trusted configuration file. There are two possibilities:
3977 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3978 to do message deliveries. Thus, the fact that it is running as a
3979 non-privileged user is plausible, and might be wanted in some special
3980 configurations. However, really_exim will have been set false when
3981 privilege was dropped, to stop Exim trying to write to its normal log
3982 files. Therefore, re-enable normal log processing, assuming the sysadmin
3983 has set up the log directory correctly.
3985 (2) If deliver_drop_privilege is not set, the configuration won't work as
3986 apparently intended, and so we log a panic message. In order to retain
3987 root for -C or -D, the caller must either be root or be invoking a
3988 trusted configuration file (when deliver_drop_privilege is false). */
3990 if (removed_privilege && (!trusted_config || macros != NULL) &&
3991 real_uid == exim_uid)
3993 if (deliver_drop_privilege)
3994 really_exim = TRUE; /* let logging work normally */
3996 log_write(0, LOG_MAIN|LOG_PANIC,
3997 "exim user lost privilege for using %s option",
3998 trusted_config? "-D" : "-C");
4001 /* Start up Perl interpreter if Perl support is configured and there is a
4002 perl_startup option, and the configuration or the command line specifies
4003 initializing starting. Note that the global variables are actually called
4004 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4007 if (perl_start_option != 0)
4008 opt_perl_at_start = (perl_start_option > 0);
4009 if (opt_perl_at_start && opt_perl_startup != NULL)
4012 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4013 errstr = init_perl(opt_perl_startup);
4016 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
4017 return EXIT_FAILURE;
4019 opt_perl_started = TRUE;
4021 #endif /* EXIM_PERL */
4023 /* Log the arguments of the call if the configuration file said so. This is
4024 a debugging feature for finding out what arguments certain MUAs actually use.
4025 Don't attempt it if logging is disabled, or if listing variables or if
4026 verifying/testing addresses or expansions. */
4028 if (((debug_selector & D_any) != 0 || LOGGING(arguments))
4029 && really_exim && !list_options && !checking)
4032 uschar *p = big_buffer;
4034 Ustrcpy(p, "cwd= (failed)");
4035 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
4037 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4039 for (i = 0; i < argc; i++)
4041 int len = Ustrlen(argv[i]);
4042 const uschar *printing;
4044 if (p + len + 8 >= big_buffer + big_buffer_size)
4047 log_write(0, LOG_MAIN, "%s", big_buffer);
4048 Ustrcpy(big_buffer, "...");
4051 printing = string_printing(argv[i]);
4052 if (printing[0] == 0) quote = US"\""; else
4054 const uschar *pp = printing;
4056 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4058 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4059 (p - big_buffer) - 4), printing, quote);
4063 if (LOGGING(arguments))
4064 log_write(0, LOG_MAIN, "%s", big_buffer);
4066 debug_printf("%s\n", big_buffer);
4069 /* Set the working directory to be the top-level spool directory. We don't rely
4070 on this in the code, which always uses fully qualified names, but it's useful
4071 for core dumps etc. Don't complain if it fails - the spool directory might not
4072 be generally accessible and calls with the -C option (and others) have lost
4073 privilege by now. Before the chdir, we try to ensure that the directory exists.
4076 if (Uchdir(spool_directory) != 0)
4079 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4080 dummy = /* quieten compiler */ Uchdir(spool_directory);
4083 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4084 alias file. Exim doesn't have such a concept, but this call is screwed into
4085 Sun's YP makefiles. Handle this by calling a configured script, as the real
4086 user who called Exim. The -oA option can be used to pass an argument to the
4091 (void)fclose(config_file);
4092 if (bi_command != NULL)
4096 argv[i++] = bi_command;
4097 if (alias_arg != NULL) argv[i++] = alias_arg;
4100 setgroups(group_count, group_list);
4101 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4103 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4104 (argv[1] == NULL)? US"" : argv[1]);
4106 execv(CS argv[0], (char *const *)argv);
4107 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
4112 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4117 /* We moved the admin/trusted check to be immediately after reading the
4118 configuration file. We leave these prints here to ensure that syslog setup,
4119 logfile setup, and so on has already happened. */
4121 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4122 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4124 /* Only an admin user may start the daemon or force a queue run in the default
4125 configuration, but the queue run restriction can be relaxed. Only an admin
4126 user may request that a message be returned to its sender forthwith. Only an
4127 admin user may specify a debug level greater than D_v (because it might show
4128 passwords, etc. in lookup queries). Only an admin user may request a queue
4129 count. Only an admin user can use the test interface to scan for email
4130 (because Exim will be in the spool dir and able to look at mails). */
4134 BOOL debugset = (debug_selector & ~D_v) != 0;
4135 if (deliver_give_up || daemon_listen || malware_test_file ||
4136 (count_queue && queue_list_requires_admin) ||
4137 (list_queue && queue_list_requires_admin) ||
4138 (queue_interval >= 0 && prod_requires_admin) ||
4139 (debugset && !running_in_test_harness))
4141 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4146 /* If the real user is not root or the exim uid, the argument for passing
4147 in an open TCP/IP connection for another message is not permitted, nor is
4148 running with the -N option for any delivery action, unless this call to exim is
4149 one that supplied an input message, or we are using a patched exim for
4150 regression testing. */
4152 if (real_uid != root_uid && real_uid != exim_uid &&
4153 (continue_hostname != NULL ||
4155 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4156 )) && !running_in_test_harness)
4158 fprintf(stderr, "exim: Permission denied\n");
4159 return EXIT_FAILURE;
4162 /* If the caller is not trusted, certain arguments are ignored when running for
4163 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4164 Note that authority for performing certain actions on messages is tested in the
4165 queue_action() function. */
4167 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4169 sender_host_name = sender_host_address = interface_address =
4170 sender_ident = received_protocol = NULL;
4171 sender_host_port = interface_port = 0;
4172 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4175 /* If a sender host address is set, extract the optional port number off the
4176 end of it and check its syntax. Do the same thing for the interface address.
4177 Exim exits if the syntax is bad. */
4181 if (sender_host_address != NULL)
4182 sender_host_port = check_port(sender_host_address);
4183 if (interface_address != NULL)
4184 interface_port = check_port(interface_address);
4187 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4192 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4193 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4197 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4198 return EXIT_FAILURE;
4202 /* If an SMTP message is being received check to see if the standard input is a
4203 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4204 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4209 union sockaddr_46 inetd_sock;
4210 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4211 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4213 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4214 if (family == AF_INET || family == AF_INET6)
4216 union sockaddr_46 interface_sock;
4217 size = sizeof(interface_sock);
4219 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4220 interface_address = host_ntoa(-1, &interface_sock, NULL,
4223 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4225 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4228 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4229 NULL, &sender_host_port);
4230 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4231 "inetd is not supported when mua_wrapper is set");
4236 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4237 return EXIT_FAILURE;
4243 /* If the load average is going to be needed while receiving a message, get it
4244 now for those OS that require the first call to os_getloadavg() to be done as
4245 root. There will be further calls later for each message received. */
4247 #ifdef LOAD_AVG_NEEDS_ROOT
4248 if (receiving_message &&
4249 (queue_only_load >= 0 ||
4250 (is_inetd && smtp_load_reserve >= 0)
4253 load_average = OS_GETLOADAVG();
4257 /* The queue_only configuration option can be overridden by -odx on the command
4258 line, except that if queue_only_override is false, queue_only cannot be unset
4259 from the command line. */
4261 if (queue_only_set && (queue_only_override || arg_queue_only))
4262 queue_only = arg_queue_only;
4264 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4267 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4268 if (arg_smtp_receive_timeout >= 0)
4269 smtp_receive_timeout = arg_smtp_receive_timeout;
4271 /* If Exim was started with root privilege, unless we have already removed the
4272 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4273 except when starting the daemon or doing some kind of delivery or address
4274 testing (-bt). These are the only cases when root need to be retained. We run
4275 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4276 retained only for starting the daemon. We always do the initgroups() in this
4277 situation (controlled by the TRUE below), in order to be as close as possible
4278 to the state Exim usually runs in. */
4280 if (!unprivileged && /* originally had root AND */
4281 !removed_privilege && /* still got root AND */
4282 !daemon_listen && /* not starting the daemon */
4283 queue_interval <= 0 && /* (either kind of daemon) */
4285 deliver_drop_privilege || /* requested unprivileged */
4287 queue_interval < 0 && /* not running the queue */
4288 (msg_action_arg < 0 || /* and */
4289 msg_action != MSG_DELIVER) && /* not delivering and */
4290 (!checking || !address_test_mode) /* not address checking */
4294 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4297 /* When we are retaining a privileged uid, we still change to the exim gid. */
4302 rv = setgid(exim_gid);
4303 /* Impact of failure is that some stuff might end up with an incorrect group.
4304 We track this for failures from root, since any attempt to change privilege
4305 by root should succeed and failures should be examined. For non-root,
4306 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4307 no need to complain then. */
4310 if (!(unprivileged || removed_privilege))
4313 "exim: changing group failed: %s\n", strerror(errno));
4317 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4318 (long int)exim_gid, strerror(errno));
4322 /* Handle a request to scan a file for malware */
4323 if (malware_test_file)
4325 #ifdef WITH_CONTENT_SCAN
4327 set_process_info("scanning file for malware");
4328 result = malware_in_file(malware_test_file);
4331 printf("No malware found.\n");
4336 printf("Malware lookup returned non-okay/fail: %d\n", result);
4340 printf("Malware found: %s\n", malware_name);
4342 printf("Malware scan detected malware of unknown name.\n");
4344 printf("Malware scanning not enabled at compile time.\n");
4349 /* Handle a request to list the delivery queue */
4353 set_process_info("listing the queue");
4354 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4358 /* Handle a request to count the delivery queue */
4362 set_process_info("counting the queue");
4367 /* Handle actions on specific messages, except for the force delivery and
4368 message load actions, which are done below. Some actions take a whole list of
4369 message ids, which are known to continue up to the end of the arguments. Others
4370 take a single message id and then operate on the recipients list. */
4372 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4374 int yield = EXIT_SUCCESS;
4375 set_process_info("acting on specified messages");
4377 if (!one_msg_action)
4379 for (i = msg_action_arg; i < argc; i++)
4380 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4381 yield = EXIT_FAILURE;
4384 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4385 recipients_arg)) yield = EXIT_FAILURE;
4389 /* We used to set up here to skip reading the ACL section, on
4390 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4391 Now, since the intro of the ${acl } expansion, ACL definitions may be
4392 needed in transports so we lost the optimisation. */
4396 /* The configuration data will have been read into POOL_PERM because we won't
4397 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4398 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4399 configuration were read into POOL_MAIN, because we don't do any resets till
4400 later on. However, it seems right, and it does ensure that both pools get used.
4403 store_pool = POOL_MAIN;
4405 /* Handle the -brt option. This is for checking out retry configurations.
4406 The next three arguments are a domain name or a complete address, and
4407 optionally two error numbers. All it does is to call the function that
4408 scans the retry configuration data. */
4410 if (test_retry_arg >= 0)
4412 retry_config *yield;
4413 int basic_errno = 0;
4417 if (test_retry_arg >= argc)
4419 printf("-brt needs a domain or address argument\n");
4420 exim_exit(EXIT_FAILURE);
4422 s1 = argv[test_retry_arg++];
4425 /* If the first argument contains no @ and no . it might be a local user
4426 or it might be a single-component name. Treat as a domain. */
4428 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4430 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4431 "being \ntreated as a one-component domain, not as a local part.\n\n",
4435 /* There may be an optional second domain arg. */
4437 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4438 s2 = argv[test_retry_arg++];
4440 /* The final arg is an error name */
4442 if (test_retry_arg < argc)
4444 uschar *ss = argv[test_retry_arg];
4446 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4449 printf("%s\n", CS error);
4450 return EXIT_FAILURE;
4453 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4454 code > 100 as an error is for matching codes to the decade. Turn them into
4455 a real error code, off the decade. */
4457 if (basic_errno == ERRNO_MAIL4XX ||
4458 basic_errno == ERRNO_RCPT4XX ||
4459 basic_errno == ERRNO_DATA4XX)
4461 int code = (more_errno >> 8) & 255;
4463 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4464 else if (code > 100)
4465 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4469 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4470 if (yield == NULL) printf("No retry information found\n"); else
4473 more_errno = yield->more_errno;
4474 printf("Retry rule: %s ", yield->pattern);
4476 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4478 printf("quota%s%s ",
4479 (more_errno > 0)? "_" : "",
4480 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4482 else if (yield->basic_errno == ECONNREFUSED)
4484 printf("refused%s%s ",
4485 (more_errno > 0)? "_" : "",
4486 (more_errno == 'M')? "MX" :
4487 (more_errno == 'A')? "A" : "");
4489 else if (yield->basic_errno == ETIMEDOUT)
4492 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4494 if (more_errno != 0) printf("_%s",
4495 (more_errno == 'M')? "MX" : "A");
4498 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4499 printf("auth_failed ");
4502 for (r = yield->rules; r != NULL; r = r->next)
4504 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4505 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4511 printf(",%d.", x/1000);
4525 exim_exit(EXIT_SUCCESS);
4528 /* Handle a request to list one or more configuration options */
4529 /* If -n was set, we suppress some information */
4533 set_process_info("listing variables");
4534 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4535 else for (i = recipients_arg; i < argc; i++)
4538 (Ustrcmp(argv[i], "router") == 0 ||
4539 Ustrcmp(argv[i], "transport") == 0 ||
4540 Ustrcmp(argv[i], "authenticator") == 0 ||
4541 Ustrcmp(argv[i], "macro") == 0))
4543 readconf_print(argv[i+1], argv[i], flag_n);
4546 else readconf_print(argv[i], NULL, flag_n);
4548 exim_exit(EXIT_SUCCESS);
4553 set_process_info("listing config");
4554 readconf_print(US"config", NULL, FALSE);
4555 exim_exit(EXIT_SUCCESS);
4559 /* Handle a request to deliver one or more messages that are already on the
4560 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4561 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4563 Delivery of specific messages is typically used for a small number when
4564 prodding by hand (when the option forced_delivery will be set) or when
4565 re-execing to regain root privilege. Each message delivery must happen in a
4566 separate process, so we fork a process for each one, and run them sequentially
4567 so that debugging output doesn't get intertwined, and to avoid spawning too
4568 many processes if a long list is given. However, don't fork for the last one;
4569 this saves a process in the common case when Exim is called to deliver just one
4572 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4574 if (prod_requires_admin && !admin_user)
4576 fprintf(stderr, "exim: Permission denied\n");
4577 exim_exit(EXIT_FAILURE);
4579 set_process_info("delivering specified messages");
4580 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4581 for (i = msg_action_arg; i < argc; i++)
4586 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4587 else if ((pid = fork()) == 0)
4589 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4590 _exit(EXIT_SUCCESS);
4594 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4596 exim_exit(EXIT_FAILURE);
4600 exim_exit(EXIT_SUCCESS);
4604 /* If only a single queue run is requested, without SMTP listening, we can just
4605 turn into a queue runner, with an optional starting message id. */
4607 if (queue_interval == 0 && !daemon_listen)
4609 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4610 (start_queue_run_id == NULL)? US"" : US" starting at ",
4611 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4612 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4613 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4614 set_process_info("running the queue (single queue run)");
4615 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4616 exim_exit(EXIT_SUCCESS);
4620 /* Find the login name of the real user running this process. This is always
4621 needed when receiving a message, because it is written into the spool file. It
4622 may also be used to construct a from: or a sender: header, and in this case we
4623 need the user's full name as well, so save a copy of it, checked for RFC822
4624 syntax and munged if necessary, if it hasn't previously been set by the -F
4625 argument. We may try to get the passwd entry more than once, in case NIS or
4626 other delays are in evidence. Save the home directory for use in filter testing
4631 if ((pw = getpwuid(real_uid)) != NULL)
4633 originator_login = string_copy(US pw->pw_name);
4634 originator_home = string_copy(US pw->pw_dir);
4636 /* If user name has not been set by -F, set it from the passwd entry
4637 unless -f has been used to set the sender address by a trusted user. */
4639 if (originator_name == NULL)
4641 if (sender_address == NULL ||
4642 (!trusted_caller && filter_test == FTEST_NONE))
4644 uschar *name = US pw->pw_gecos;
4645 uschar *amp = Ustrchr(name, '&');
4648 /* Most Unix specify that a '&' character in the gecos field is
4649 replaced by a copy of the login name, and some even specify that
4650 the first character should be upper cased, so that's what we do. */
4655 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4656 amp - name, name, &loffset, originator_login, amp + 1);
4657 buffer[loffset] = toupper(buffer[loffset]);
4661 /* If a pattern for matching the gecos field was supplied, apply
4662 it and then expand the name string. */
4664 if (gecos_pattern != NULL && gecos_name != NULL)
4667 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4669 if (regex_match_and_setup(re, name, 0, -1))
4671 uschar *new_name = expand_string(gecos_name);
4673 if (new_name != NULL)
4675 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4676 "gecos field \"%s\"\n", new_name, name);
4679 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4680 "\"%s\": %s\n", gecos_name, expand_string_message);
4682 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4683 "gecos field \"%s\"\n", gecos_pattern, name);
4684 store_free((void *)re);
4686 originator_name = string_copy(name);
4689 /* A trusted caller has used -f but not -F */
4691 else originator_name = US"";
4694 /* Break the retry loop */
4699 if (++i > finduser_retries) break;
4703 /* If we cannot get a user login, log the incident and give up, unless the
4704 configuration specifies something to use. When running in the test harness,
4705 any setting of unknown_login overrides the actual name. */
4707 if (originator_login == NULL || running_in_test_harness)
4709 if (unknown_login != NULL)
4711 originator_login = expand_string(unknown_login);
4712 if (originator_name == NULL && unknown_username != NULL)
4713 originator_name = expand_string(unknown_username);
4714 if (originator_name == NULL) originator_name = US"";
4716 if (originator_login == NULL)
4717 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4721 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4724 originator_name = string_copy(parse_fix_phrase(originator_name,
4725 Ustrlen(originator_name), big_buffer, big_buffer_size));
4727 /* If a message is created by this call of Exim, the uid/gid of its originator
4728 are those of the caller. These values are overridden if an existing message is
4729 read in from the spool. */
4731 originator_uid = real_uid;
4732 originator_gid = real_gid;
4734 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4735 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4737 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4738 returns. We leave this till here so that the originator_ fields are available
4739 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4742 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4746 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4747 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4748 "mua_wrapper is set");
4753 /* If the sender ident has not been set (by a trusted caller) set it to
4754 the caller. This will get overwritten below for an inetd call. If a trusted
4755 caller has set it empty, unset it. */
4757 if (sender_ident == NULL) sender_ident = originator_login;
4758 else if (sender_ident[0] == 0) sender_ident = NULL;
4760 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4761 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4762 originator_* variables set. */
4764 if (test_rewrite_arg >= 0)
4766 really_exim = FALSE;
4767 if (test_rewrite_arg >= argc)
4769 printf("-brw needs an address argument\n");
4770 exim_exit(EXIT_FAILURE);
4772 rewrite_test(argv[test_rewrite_arg]);
4773 exim_exit(EXIT_SUCCESS);
4776 /* A locally-supplied message is considered to be coming from a local user
4777 unless a trusted caller supplies a sender address with -f, or is passing in the
4778 message via SMTP (inetd invocation or otherwise). */
4780 if ((sender_address == NULL && !smtp_input) ||
4781 (!trusted_caller && filter_test == FTEST_NONE))
4783 sender_local = TRUE;
4785 /* A trusted caller can supply authenticated_sender and authenticated_id
4786 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4787 defaults except when host checking. */
4789 if (authenticated_sender == NULL && !host_checking)
4790 authenticated_sender = string_sprintf("%s@%s", originator_login,
4791 qualify_domain_sender);
4792 if (authenticated_id == NULL && !host_checking)
4793 authenticated_id = originator_login;
4796 /* Trusted callers are always permitted to specify the sender address.
4797 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4798 is specified is the empty address. However, if a trusted caller does not
4799 specify a sender address for SMTP input, we leave sender_address unset. This
4800 causes the MAIL commands to be honoured. */
4802 if ((!smtp_input && sender_address == NULL) ||
4803 !receive_check_set_sender(sender_address))
4805 /* Either the caller is not permitted to set a general sender, or this is
4806 non-SMTP input and the trusted caller has not set a sender. If there is no
4807 sender, or if a sender other than <> is set, override with the originator's
4808 login (which will get qualified below), except when checking things. */
4810 if (sender_address == NULL /* No sender_address set */
4812 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4813 !checking && /* Not running tests, AND */
4814 filter_test == FTEST_NONE)) /* Not testing a filter */
4816 sender_address = originator_login;
4817 sender_address_forced = FALSE;
4818 sender_address_domain = 0;
4822 /* Remember whether an untrusted caller set the sender address */
4824 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4826 /* Ensure that the sender address is fully qualified unless it is the empty
4827 address, which indicates an error message, or doesn't exist (root caller, smtp
4828 interface, no -f argument). */
4830 if (sender_address != NULL && sender_address[0] != 0 &&
4831 sender_address_domain == 0)
4832 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4833 qualify_domain_sender);
4835 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4837 /* Handle a request to verify a list of addresses, or test them for delivery.
4838 This must follow the setting of the sender address, since routers can be
4839 predicated upon the sender. If no arguments are given, read addresses from
4840 stdin. Set debug_level to at least D_v to get full output for address testing.
4843 if (verify_address_mode || address_test_mode)
4846 int flags = vopt_qualify;
4848 if (verify_address_mode)
4850 if (!verify_as_sender) flags |= vopt_is_recipient;
4851 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4856 flags |= vopt_is_recipient;
4857 debug_selector |= D_v;
4858 debug_file = stderr;
4859 debug_fd = fileno(debug_file);
4860 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4863 if (recipients_arg < argc)
4865 while (recipients_arg < argc)
4867 uschar *s = argv[recipients_arg++];
4870 BOOL finished = FALSE;
4871 uschar *ss = parse_find_address_end(s, FALSE);
4872 if (*ss == ',') *ss = 0; else finished = TRUE;
4873 test_address(s, flags, &exit_value);
4876 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4883 uschar *s = get_stdinput(NULL, NULL);
4884 if (s == NULL) break;
4885 test_address(s, flags, &exit_value);
4889 exim_exit(exit_value);
4892 /* Handle expansion checking. Either expand items on the command line, or read
4893 from stdin if there aren't any. If -Mset was specified, load the message so
4894 that its variables can be used, but restrict this facility to admin users.
4895 Otherwise, if -bem was used, read a message from stdin. */
4899 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4901 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4904 fprintf(stderr, "exim: permission denied\n");
4907 message_id = argv[msg_action_arg];
4908 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4909 if (!spool_open_datafile(message_id))
4910 printf ("Failed to load message datafile %s\n", message_id);
4911 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4912 printf ("Failed to load message %s\n", message_id);
4915 /* Read a test message from a file. We fudge it up to be on stdin, saving
4916 stdin itself for later reading of expansion strings. */
4918 else if (expansion_test_message != NULL)
4920 int save_stdin = dup(0);
4921 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4924 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4926 return EXIT_FAILURE;
4929 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4930 message_ended = END_NOTENDED;
4931 read_message_body(receive_msg(extract_recipients));
4932 message_linecount += body_linecount;
4933 (void)dup2(save_stdin, 0);
4934 (void)close(save_stdin);
4935 clearerr(stdin); /* Required by Darwin */
4938 /* Allow $recipients for this testing */
4940 enable_dollar_recipients = TRUE;
4942 /* Expand command line items */
4944 if (recipients_arg < argc)
4946 while (recipients_arg < argc)
4948 uschar *s = argv[recipients_arg++];
4949 uschar *ss = expand_string(s);
4950 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4951 else printf("%s\n", CS ss);
4959 char *(*fn_readline)(const char *) = NULL;
4960 void (*fn_addhist)(const char *) = NULL;
4963 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4969 uschar *source = get_stdinput(fn_readline, fn_addhist);
4970 if (source == NULL) break;
4971 ss = expand_string(source);
4973 printf ("Failed: %s\n", expand_string_message);
4974 else printf("%s\n", CS ss);
4978 if (dlhandle != NULL) dlclose(dlhandle);
4982 /* The data file will be open after -Mset */
4984 if (deliver_datafile >= 0)
4986 (void)close(deliver_datafile);
4987 deliver_datafile = -1;
4990 exim_exit(EXIT_SUCCESS);
4994 /* The active host name is normally the primary host name, but it can be varied
4995 for hosts that want to play several parts at once. We need to ensure that it is
4996 set for host checking, and for receiving messages. */
4998 smtp_active_hostname = primary_hostname;
4999 if (raw_active_hostname != NULL)
5001 uschar *nah = expand_string(raw_active_hostname);
5004 if (!expand_string_forcedfail)
5005 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5006 "(smtp_active_hostname): %s", raw_active_hostname,
5007 expand_string_message);
5009 else if (nah[0] != 0) smtp_active_hostname = nah;
5012 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5013 given IP address so that the blocking and relay configuration can be tested.
5014 Unless a sender_ident was set by -oMt, we discard it (the default is the
5015 caller's login name). An RFC 1413 call is made only if we are running in the
5016 test harness and an incoming interface and both ports are specified, because
5017 there is no TCP/IP call to find the ident for. */
5024 if (!sender_ident_set)
5026 sender_ident = NULL;
5027 if (running_in_test_harness && sender_host_port != 0 &&
5028 interface_address != NULL && interface_port != 0)
5029 verify_get_ident(1413);
5032 /* In case the given address is a non-canonical IPv6 address, canonicize
5033 it. The code works for both IPv4 and IPv6, as it happens. */
5035 size = host_aton(sender_host_address, x);
5036 sender_host_address = store_get(48); /* large enough for full IPv6 */
5037 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5039 /* Now set up for testing */
5041 host_build_sender_fullhost();
5045 sender_local = FALSE;
5046 sender_host_notsocket = TRUE;
5047 debug_file = stderr;
5048 debug_fd = fileno(debug_file);
5049 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5050 "**** but without any ident (RFC 1413) callback.\n"
5051 "**** This is not for real!\n\n",
5052 sender_host_address);
5054 if (verify_check_host(&hosts_connection_nolog) == OK)
5055 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5056 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5058 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5059 because a log line has already been written for all its failure exists
5060 (usually "connection refused: <reason>") and writing another one is
5061 unnecessary clutter. */
5063 if (smtp_start_session())
5065 reset_point = store_get(0);
5068 store_reset(reset_point);
5069 if (smtp_setup_msg() <= 0) break;
5070 if (!receive_msg(FALSE)) break;
5074 exim_exit(EXIT_SUCCESS);
5078 /* Arrange for message reception if recipients or SMTP were specified;
5079 otherwise complain unless a version print (-bV) happened or this is a filter
5080 verification test or info dump.
5081 In the former case, show the configuration file name. */
5083 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5085 if (version_printed)
5087 printf("Configuration file is %s\n", config_main_filename);
5088 return EXIT_SUCCESS;
5091 if (info_flag != CMDINFO_NONE)
5093 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5094 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5097 if (filter_test == FTEST_NONE)
5098 exim_usage(called_as);
5102 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5103 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5104 that we are not called from inetd, because that is rejected above. The
5105 following configuration settings are forced here:
5107 (1) Synchronous delivery (-odi)
5108 (2) Errors to stderr (-oep == -oeq)
5109 (3) No parallel remote delivery
5110 (4) Unprivileged delivery
5112 We don't force overall queueing options because there are several of them;
5113 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5114 to override any SMTP queueing. */
5118 synchronous_delivery = TRUE;
5119 arg_error_handling = ERRORS_STDERR;
5120 remote_max_parallel = 1;
5121 deliver_drop_privilege = TRUE;
5123 queue_smtp_domains = NULL;
5124 #ifdef EXPERIMENTAL_INTERNATIONAL
5125 message_utf8_downconvert = -1; /* convert-if-needed */
5130 /* Prepare to accept one or more new messages on the standard input. When a
5131 message has been read, its id is returned in message_id[]. If doing immediate
5132 delivery, we fork a delivery process for each received message, except for the
5133 last one, where we can save a process switch.
5135 It is only in non-smtp mode that error_handling is allowed to be changed from
5136 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5137 sendmail error modes other than -oem ever actually used? Later: yes.) */
5139 if (!smtp_input) error_handling = arg_error_handling;
5141 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5142 logging being sent down the socket and make an identd call to get the
5147 (void)fclose(stderr);
5148 exim_nullstd(); /* Re-open to /dev/null */
5149 verify_get_ident(IDENT_PORT);
5150 host_build_sender_fullhost();
5151 set_process_info("handling incoming connection from %s via inetd",
5155 /* If the sender host address has been set, build sender_fullhost if it hasn't
5156 already been done (which it will have been for inetd). This caters for the
5157 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5158 so that the test for IP options is skipped for -bs input. */
5160 if (sender_host_address != NULL && sender_fullhost == NULL)
5162 host_build_sender_fullhost();
5163 set_process_info("handling incoming connection from %s via -oMa",
5165 sender_host_notsocket = TRUE;
5168 /* Otherwise, set the sender host as unknown except for inetd calls. This
5169 prevents host checking in the case of -bs not from inetd and also for -bS. */
5171 else if (!is_inetd) sender_host_unknown = TRUE;
5173 /* If stdout does not exist, then dup stdin to stdout. This can happen
5174 if exim is started from inetd. In this case fd 0 will be set to the socket,
5175 but fd 1 will not be set. This also happens for passed SMTP channels. */
5177 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5179 /* Set up the incoming protocol name and the state of the program. Root is
5180 allowed to force received protocol via the -oMr option above. If we have come
5181 via inetd, the process info has already been set up. We don't set
5182 received_protocol here for smtp input, as it varies according to
5183 batch/HELO/EHLO/AUTH/TLS. */
5187 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5188 smtp_batched_input? "batched " : "",
5189 (sender_address!= NULL)? sender_address : originator_login);
5193 if (received_protocol == NULL)
5194 received_protocol = string_sprintf("local%s", called_as);
5195 set_process_info("accepting a local non-SMTP message from <%s>",
5199 /* Initialize the session_local_queue-only flag (this will be ignored if
5200 mua_wrapper is set) */
5203 session_local_queue_only = queue_only;
5205 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5206 the spool if so configured. On failure, we must not attempt to send an error
5207 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5208 error code is given.) */
5210 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5212 fprintf(stderr, "exim: insufficient disk space\n");
5213 return EXIT_FAILURE;
5216 /* If this is smtp input of any kind, real or batched, handle the start of the
5219 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5220 because a log line has already been written for all its failure exists
5221 (usually "connection refused: <reason>") and writing another one is
5222 unnecessary clutter. */
5228 if (verify_check_host(&hosts_connection_nolog) == OK)
5229 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5230 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5231 if (!smtp_start_session())
5234 exim_exit(EXIT_SUCCESS);
5238 /* Otherwise, set up the input size limit here. */
5242 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5243 if (expand_string_message != NULL)
5245 if (thismessage_size_limit == -1)
5246 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5247 "message_size_limit: %s", expand_string_message);
5249 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5250 "message_size_limit: %s", expand_string_message);
5254 /* Loop for several messages when reading SMTP input. If we fork any child
5255 processes, we don't want to wait for them unless synchronous delivery is
5256 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5257 same as SIG_DFL, despite the fact that documentation often lists the default as
5258 "ignore". This is a confusing area. This is what I know:
5260 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5261 processes that complete simply to go away without ever becoming defunct. You
5262 can't then wait for them - but we don't want to wait for them in the
5263 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5264 happen for all OS (e.g. *BSD is different).
5266 But that's not the end of the story. Some (many? all?) systems have the
5267 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5268 has by default, so it seems that the difference is merely one of default
5269 (compare restarting vs non-restarting signals).
5271 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5272 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5273 of the loop below. Paranoia rules.
5275 February 2003: That's *still* not the end of the story. There are now versions
5276 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5277 process then calls waitpid(), a grumble is written to the system log, because
5278 this is logically inconsistent. In other words, it doesn't like the paranoia.
5279 As a consequenc of this, the waitpid() below is now excluded if we are sure
5280 that SIG_IGN works. */
5282 if (!synchronous_delivery)
5285 struct sigaction act;
5286 act.sa_handler = SIG_IGN;
5287 sigemptyset(&(act.sa_mask));
5288 act.sa_flags = SA_NOCLDWAIT;
5289 sigaction(SIGCHLD, &act, NULL);
5291 signal(SIGCHLD, SIG_IGN);
5295 /* Save the current store pool point, for resetting at the start of
5296 each message, and save the real sender address, if any. */
5298 reset_point = store_get(0);
5299 real_sender_address = sender_address;
5301 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5302 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5307 store_reset(reset_point);
5310 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5311 input and build the recipients list, before calling receive_msg() to read the
5312 message proper. Whatever sender address is given in the SMTP transaction is
5313 often ignored for local senders - we use the actual sender, which is normally
5314 either the underlying user running this process or a -f argument provided by
5315 a trusted caller. It is saved in real_sender_address. The test for whether to
5316 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5321 if ((rc = smtp_setup_msg()) > 0)
5323 if (real_sender_address != NULL &&
5324 !receive_check_set_sender(sender_address))
5326 sender_address = raw_sender = real_sender_address;
5327 sender_address_unrewritten = NULL;
5330 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5331 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5332 the very end. The result of the ACL is ignored (as for other non-SMTP
5333 messages). It is run for its potential side effects. */
5335 if (smtp_batched_input && acl_not_smtp_start != NULL)
5337 uschar *user_msg, *log_msg;
5338 enable_dollar_recipients = TRUE;
5339 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5340 &user_msg, &log_msg);
5341 enable_dollar_recipients = FALSE;
5344 /* Now get the data for the message */
5346 more = receive_msg(extract_recipients);
5347 if (message_id[0] == 0)
5350 smtp_log_no_mail(); /* Log no mail if configured */
5351 exim_exit(EXIT_FAILURE);
5356 smtp_log_no_mail(); /* Log no mail if configured */
5357 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5361 /* In the non-SMTP case, we have all the information from the command
5362 line, but must process it in case it is in the more general RFC822
5363 format, and in any case, to detect syntax errors. Also, it appears that
5364 the use of comma-separated lists as single arguments is common, so we
5365 had better support them. */
5371 int count = argc - recipients_arg;
5372 uschar **list = argv + recipients_arg;
5374 /* These options cannot be changed dynamically for non-SMTP messages */
5376 active_local_sender_retain = local_sender_retain;
5377 active_local_from_check = local_from_check;
5379 /* Save before any rewriting */
5381 raw_sender = string_copy(sender_address);
5383 /* Loop for each argument */
5385 for (i = 0; i < count; i++)
5387 int start, end, domain;
5389 uschar *s = list[i];
5391 /* Loop for each comma-separated address */
5395 BOOL finished = FALSE;
5397 uschar *ss = parse_find_address_end(s, FALSE);
5399 if (*ss == ',') *ss = 0; else finished = TRUE;
5401 /* Check max recipients - if -t was used, these aren't recipients */
5403 if (recipients_max > 0 && ++rcount > recipients_max &&
5404 !extract_recipients)
5405 if (error_handling == ERRORS_STDERR)
5407 fprintf(stderr, "exim: too many recipients\n");
5408 exim_exit(EXIT_FAILURE);
5413 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5414 errors_sender_rc : EXIT_FAILURE;
5417 #ifdef EXPERIMENTAL_INTERNATIONAL
5419 BOOL b = allow_utf8_domains;
5420 allow_utf8_domains = TRUE;
5423 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5425 #ifdef EXPERIMENTAL_INTERNATIONAL
5426 if (string_is_utf8(recipient))
5427 message_smtputf8 = TRUE;
5429 allow_utf8_domains = b;
5432 if (domain == 0 && !allow_unqualified_recipient)
5435 errmess = US"unqualified recipient address not allowed";
5438 if (recipient == NULL)
5440 if (error_handling == ERRORS_STDERR)
5442 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5443 string_printing(list[i]), errmess);
5444 exim_exit(EXIT_FAILURE);
5450 eblock.text1 = string_printing(list[i]);
5451 eblock.text2 = errmess;
5453 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5454 errors_sender_rc : EXIT_FAILURE;
5458 receive_add_recipient(recipient, -1);
5461 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5465 /* Show the recipients when debugging */
5470 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5471 if (recipients_list != NULL)
5473 debug_printf("Recipients:\n");
5474 for (i = 0; i < recipients_count; i++)
5475 debug_printf(" %s\n", recipients_list[i].address);
5479 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5480 ignored; rejecting here would just add complication, and it can just as
5481 well be done later. Allow $recipients to be visible in the ACL. */
5483 if (acl_not_smtp_start != NULL)
5485 uschar *user_msg, *log_msg;
5486 enable_dollar_recipients = TRUE;
5487 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5488 &user_msg, &log_msg);
5489 enable_dollar_recipients = FALSE;
5492 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5493 will just read the headers for the message, and not write anything onto the
5496 message_ended = END_NOTENDED;
5497 more = receive_msg(extract_recipients);
5499 /* more is always FALSE here (not SMTP message) when reading a message
5500 for real; when reading the headers of a message for filter testing,
5501 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5503 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5504 } /* Non-SMTP message reception */
5506 /* If this is a filter testing run, there are headers in store, but
5507 no message on the spool. Run the filtering code in testing mode, setting
5508 the domain to the qualify domain and the local part to the current user,
5509 unless they have been set by options. The prefix and suffix are left unset
5510 unless specified. The the return path is set to to the sender unless it has
5511 already been set from a return-path header in the message. */
5513 if (filter_test != FTEST_NONE)
5515 deliver_domain = (ftest_domain != NULL)?
5516 ftest_domain : qualify_domain_recipient;
5517 deliver_domain_orig = deliver_domain;
5518 deliver_localpart = (ftest_localpart != NULL)?
5519 ftest_localpart : originator_login;
5520 deliver_localpart_orig = deliver_localpart;
5521 deliver_localpart_prefix = ftest_prefix;
5522 deliver_localpart_suffix = ftest_suffix;
5523 deliver_home = originator_home;
5525 if (return_path == NULL)
5527 printf("Return-path copied from sender\n");
5528 return_path = string_copy(sender_address);
5531 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5532 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5534 receive_add_recipient(
5535 string_sprintf("%s%s%s@%s",
5536 (ftest_prefix == NULL)? US"" : ftest_prefix,
5538 (ftest_suffix == NULL)? US"" : ftest_suffix,
5539 deliver_domain), -1);
5541 printf("Recipient = %s\n", recipients_list[0].address);
5542 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5543 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5545 if (chdir("/")) /* Get away from wherever the user is running this from */
5547 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5548 exim_exit(EXIT_FAILURE);
5551 /* Now we run either a system filter test, or a user filter test, or both.
5552 In the latter case, headers added by the system filter will persist and be
5553 available to the user filter. We need to copy the filter variables
5556 if ((filter_test & FTEST_SYSTEM) != 0)
5558 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5559 exim_exit(EXIT_FAILURE);
5562 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5564 if ((filter_test & FTEST_USER) != 0)
5566 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5567 exim_exit(EXIT_FAILURE);
5570 exim_exit(EXIT_SUCCESS);
5573 /* Else act on the result of message reception. We should not get here unless
5574 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5575 will be TRUE. If it is not, check on the number of messages received in this
5578 if (!session_local_queue_only &&
5579 smtp_accept_queue_per_connection > 0 &&
5580 receive_messagecount > smtp_accept_queue_per_connection)
5582 session_local_queue_only = TRUE;
5583 queue_only_reason = 2;
5586 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5587 and queue_only_load is set, check that the load average is below it. If it is
5588 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5589 default), we put the whole session into queue_only mode. It then remains this
5590 way for any subsequent messages on the same SMTP connection. This is a
5591 deliberate choice; even though the load average may fall, it doesn't seem
5592 right to deliver later messages on the same call when not delivering earlier
5593 ones. However, there are odd cases where this is not wanted, so this can be
5594 changed by setting queue_only_load_latch false. */
5596 local_queue_only = session_local_queue_only;
5597 if (!local_queue_only && queue_only_load >= 0)
5599 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5600 if (local_queue_only)
5602 queue_only_reason = 3;
5603 if (queue_only_load_latch) session_local_queue_only = TRUE;
5607 /* If running as an MUA wrapper, all queueing options and freezing options
5611 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5613 /* Log the queueing here, when it will get a message id attached, but
5614 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5617 if (local_queue_only) switch(queue_only_reason)
5620 log_write(L_delay_delivery,
5621 LOG_MAIN, "no immediate delivery: more than %d messages "
5622 "received in one connection", smtp_accept_queue_per_connection);
5626 log_write(L_delay_delivery,
5627 LOG_MAIN, "no immediate delivery: load average %.2f",
5628 (double)load_average/1000.0);
5632 /* Else do the delivery unless the ACL or local_scan() called for queue only
5633 or froze the message. Always deliver in a separate process. A fork failure is
5634 not a disaster, as the delivery will eventually happen on a subsequent queue
5635 run. The search cache must be tidied before the fork, as the parent will
5636 do it before exiting. The child will trigger a lookup failure and
5637 thereby defer the delivery if it tries to use (for example) a cached ldap
5638 connection that the parent has called unbind on. */
5640 else if (!queue_only_policy && !deliver_freeze)
5645 if ((pid = fork()) == 0)
5648 close_unwanted(); /* Close unwanted file descriptors and TLS */
5649 exim_nullstd(); /* Ensure std{in,out,err} exist */
5651 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5652 mode, deliver_drop_privilege is forced TRUE). */
5654 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5656 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5658 /* Control does not return here. */
5661 /* No need to re-exec */
5663 rc = deliver_message(message_id, FALSE, FALSE);
5665 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5666 EXIT_SUCCESS : EXIT_FAILURE);
5671 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5672 "process: %s", strerror(errno));
5675 /* In the parent, wait if synchronous delivery is required. This will
5676 always be the case in MUA wrapper mode. */
5678 else if (synchronous_delivery)
5681 while (wait(&status) != pid);
5682 if ((status & 0x00ff) != 0)
5683 log_write(0, LOG_MAIN|LOG_PANIC,
5684 "process %d crashed with signal %d while delivering %s",
5685 (int)pid, status & 0x00ff, message_id);
5686 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5690 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5691 automatically reaps children (see comments above the loop), clear away any
5692 finished subprocesses here, in case there are lots of messages coming in
5693 from the same source. */
5695 #ifndef SIG_IGN_WORKS
5696 while (waitpid(-1, NULL, WNOHANG) > 0);
5700 exim_exit(EXIT_SUCCESS); /* Never returns */
5701 return 0; /* To stop compiler warning */