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");
820 #ifdef WITH_OLD_DEMIME
821 fprintf(f, " Old_Demime");
823 #ifndef DISABLE_DNSSEC
824 fprintf(f, " DNSSEC");
832 #ifdef EXPERIMENTAL_SPF
833 fprintf(f, " Experimental_SPF");
835 #ifdef EXPERIMENTAL_SRS
836 fprintf(f, " Experimental_SRS");
838 #ifdef EXPERIMENTAL_BRIGHTMAIL
839 fprintf(f, " Experimental_Brightmail");
841 #ifdef EXPERIMENTAL_DANE
842 fprintf(f, " Experimental_DANE");
844 #ifdef EXPERIMENTAL_DCC
845 fprintf(f, " Experimental_DCC");
847 #ifdef EXPERIMENTAL_DMARC
848 fprintf(f, " Experimental_DMARC");
850 #ifdef EXPERIMENTAL_DSN_INFO
851 fprintf(f, " Experimental_DSN_info");
853 #ifdef EXPERIMENTAL_INTERNATIONAL
854 fprintf(f, " Experimental_International");
856 #ifdef EXPERIMENTAL_PROXY
857 fprintf(f, " Experimental_Proxy");
859 #ifdef EXPERIMENTAL_EVENT
860 fprintf(f, " Experimental_Event");
862 #ifdef EXPERIMENTAL_REDIS
863 fprintf(f, " Experimental_Redis");
865 #ifdef EXPERIMENTAL_SOCKS
866 fprintf(f, " Experimental_SOCKS");
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 local_queue_only;
1497 BOOL one_msg_action = FALSE;
1498 BOOL queue_only_set = FALSE;
1499 BOOL receiving_message = TRUE;
1500 BOOL sender_ident_set = FALSE;
1501 BOOL session_local_queue_only;
1503 BOOL removed_privilege = FALSE;
1504 BOOL usage_wanted = FALSE;
1505 BOOL verify_address_mode = FALSE;
1506 BOOL verify_as_sender = FALSE;
1507 BOOL version_printed = FALSE;
1508 uschar *alias_arg = NULL;
1509 uschar *called_as = US"";
1510 uschar *cmdline_syslog_name = NULL;
1511 uschar *start_queue_run_id = NULL;
1512 uschar *stop_queue_run_id = NULL;
1513 uschar *expansion_test_message = NULL;
1514 uschar *ftest_domain = NULL;
1515 uschar *ftest_localpart = NULL;
1516 uschar *ftest_prefix = NULL;
1517 uschar *ftest_suffix = NULL;
1518 uschar *log_oneline = NULL;
1519 uschar *malware_test_file = NULL;
1520 uschar *real_sender_address;
1521 uschar *originator_home = US"/";
1526 struct stat statbuf;
1527 pid_t passed_qr_pid = (pid_t)0;
1528 int passed_qr_pipe = -1;
1529 gid_t group_list[NGROUPS_MAX];
1531 /* For the -bI: flag */
1532 enum commandline_info info_flag = CMDINFO_NONE;
1533 BOOL info_stdout = FALSE;
1535 /* Possible options for -R and -S */
1537 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1539 /* Need to define this in case we need to change the environment in order
1540 to get rid of a bogus time zone. We have to make it char rather than uschar
1541 because some OS define it in /usr/include/unistd.h. */
1543 extern char **environ;
1545 /* If the Exim user and/or group and/or the configuration file owner/group were
1546 defined by ref:name at build time, we must now find the actual uid/gid values.
1547 This is a feature to make the lives of binary distributors easier. */
1549 #ifdef EXIM_USERNAME
1550 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1554 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1558 /* If ref:name uses a number as the name, route_finduser() returns
1559 TRUE with exim_uid set and pw coerced to NULL. */
1561 exim_gid = pw->pw_gid;
1562 #ifndef EXIM_GROUPNAME
1566 "exim: ref:name should specify a usercode, not a group.\n"
1567 "exim: can't let you get away with it unless you also specify a group.\n");
1574 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1580 #ifdef EXIM_GROUPNAME
1581 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1583 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1589 #ifdef CONFIGURE_OWNERNAME
1590 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1592 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1593 CONFIGURE_OWNERNAME);
1598 /* We default the system_filter_user to be the Exim run-time user, as a
1599 sane non-root value. */
1600 system_filter_uid = exim_uid;
1602 #ifdef CONFIGURE_GROUPNAME
1603 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1605 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1606 CONFIGURE_GROUPNAME);
1611 /* In the Cygwin environment, some initialization used to need doing.
1612 It was fudged in by means of this macro; now no longer but we'll leave
1613 it in case of others. */
1619 /* Check a field which is patched when we are running Exim within its
1620 testing harness; do a fast initial check, and then the whole thing. */
1622 running_in_test_harness =
1623 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1625 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1626 at the start of a program; however, it seems that some environments do not
1627 follow this. A "strange" locale can affect the formatting of timestamps, so we
1630 setlocale(LC_ALL, "C");
1632 /* Set up the default handler for timing using alarm(). */
1634 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1636 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1637 because store_malloc writes a log entry on failure. */
1639 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1640 if (log_buffer == NULL)
1642 fprintf(stderr, "exim: failed to get store for log buffer\n");
1646 /* Initialize the default log options. */
1648 bits_set(log_selector, log_selector_size, log_default);
1650 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1651 NULL when the daemon is run and the file is closed. We have to use this
1652 indirection, because some systems don't allow writing to the variable "stderr".
1655 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1657 /* Arrange for the PCRE regex library to use our store functions. Note that
1658 the normal calls are actually macros that add additional arguments for
1659 debugging purposes so we have to assign specially constructed functions here.
1660 The default is to use store in the stacking pool, but this is overridden in the
1661 regex_must_compile() function. */
1663 pcre_malloc = function_store_get;
1664 pcre_free = function_dummy_free;
1666 /* Ensure there is a big buffer for temporary use in several places. It is put
1667 in malloc store so that it can be freed for enlargement if necessary. */
1669 big_buffer = store_malloc(big_buffer_size);
1671 /* Set up the handler for the data request signal, and set the initial
1672 descriptive text. */
1674 set_process_info("initializing");
1675 os_restarting_signal(SIGUSR1, usr1_handler);
1677 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1678 in the daemon code. For the rest of Exim's uses, we ignore it. */
1680 signal(SIGHUP, SIG_IGN);
1682 /* We don't want to die on pipe errors as the code is written to handle
1683 the write error instead. */
1685 signal(SIGPIPE, SIG_IGN);
1687 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1688 set to SIG_IGN. This causes subprocesses that complete before the parent
1689 process waits for them not to hang around, so when Exim calls wait(), nothing
1690 is there. The wait() code has been made robust against this, but let's ensure
1691 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1692 ending status. We use sigaction rather than plain signal() on those OS where
1693 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1694 problem on AIX with this.) */
1698 struct sigaction act;
1699 act.sa_handler = SIG_DFL;
1700 sigemptyset(&(act.sa_mask));
1702 sigaction(SIGCHLD, &act, NULL);
1705 signal(SIGCHLD, SIG_DFL);
1708 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1713 /* Set up the version number. Set up the leading 'E' for the external form of
1714 message ids, set the pointer to the internal form, and initialize it to
1715 indicate no message being processed. */
1718 message_id_option[0] = '-';
1719 message_id_external = message_id_option + 1;
1720 message_id_external[0] = 'E';
1721 message_id = message_id_external + 1;
1724 /* Set the umask to zero so that any files Exim creates using open() are
1725 created with the modes that it specifies. NOTE: Files created with fopen() have
1726 a problem, which was not recognized till rather late (February 2006). With this
1727 umask, such files will be world writeable. (They are all content scanning files
1728 in the spool directory, which isn't world-accessible, so this is not a
1729 disaster, but it's untidy.) I don't want to change this overall setting,
1730 however, because it will interact badly with the open() calls. Instead, there's
1731 now a function called modefopen() that fiddles with the umask while calling
1736 /* Precompile the regular expression for matching a message id. Keep this in
1737 step with the code that generates ids in the accept.c module. We need to do
1738 this here, because the -M options check their arguments for syntactic validity
1739 using mac_ismsgid, which uses this. */
1742 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1744 /* Precompile the regular expression that is used for matching an SMTP error
1745 code, possibly extended, at the start of an error message. Note that the
1746 terminating whitespace character is included. */
1749 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1752 #ifdef WHITELIST_D_MACROS
1753 /* Precompile the regular expression used to filter the content of macros
1754 given to -D for permissibility. */
1756 regex_whitelisted_macro =
1757 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1760 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1763 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1764 this seems to be a generally accepted convention, since one finds symbolic
1765 links called "mailq" in standard OS configurations. */
1767 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1768 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1771 receiving_message = FALSE;
1772 called_as = US"-mailq";
1775 /* If the program is called as "rmail" treat it as equivalent to
1776 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1777 i.e. preventing a single dot on a line from terminating the message, and
1778 returning with zero return code, even in cases of error (provided an error
1779 message has been sent). */
1781 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1782 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1785 called_as = US"-rmail";
1786 errors_sender_rc = EXIT_SUCCESS;
1789 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1790 this is a smail convention. */
1792 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1793 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1795 smtp_input = smtp_batched_input = TRUE;
1796 called_as = US"-rsmtp";
1799 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1800 this is a smail convention. */
1802 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1803 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1806 receiving_message = FALSE;
1807 called_as = US"-runq";
1810 /* If the program is called as "newaliases" treat it as equivalent to
1811 "exim -bi"; this is a sendmail convention. */
1813 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1814 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1817 receiving_message = FALSE;
1818 called_as = US"-newaliases";
1821 /* Save the original effective uid for a couple of uses later. It should
1822 normally be root, but in some esoteric environments it may not be. */
1824 original_euid = geteuid();
1826 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1827 to be the same as the real ones. This makes a difference only if Exim is setuid
1828 (or setgid) to something other than root, which could be the case in some
1829 special configurations. */
1831 real_uid = getuid();
1832 real_gid = getgid();
1834 if (real_uid == root_uid)
1836 rv = setgid(real_gid);
1839 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1840 (long int)real_gid, strerror(errno));
1843 rv = setuid(real_uid);
1846 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1847 (long int)real_uid, strerror(errno));
1852 /* If neither the original real uid nor the original euid was root, Exim is
1853 running in an unprivileged state. */
1855 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1857 /* Scan the program's arguments. Some can be dealt with right away; others are
1858 simply recorded for checking and handling afterwards. Do a high-level switch
1859 on the second character (the one after '-'), to save some effort. */
1861 for (i = 1; i < argc; i++)
1863 BOOL badarg = FALSE;
1864 uschar *arg = argv[i];
1868 /* An argument not starting with '-' is the start of a recipients list;
1869 break out of the options-scanning loop. */
1877 /* An option consistion of -- terminates the options */
1879 if (Ustrcmp(arg, "--") == 0)
1881 recipients_arg = i + 1;
1885 /* Handle flagged options */
1887 switchchar = arg[1];
1890 /* Make all -ex options synonymous with -oex arguments, since that
1891 is assumed by various callers. Also make -qR options synonymous with -R
1892 options, as that seems to be required as well. Allow for -qqR too, and
1893 the same for -S options. */
1895 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1896 Ustrncmp(arg+1, "qR", 2) == 0 ||
1897 Ustrncmp(arg+1, "qS", 2) == 0)
1899 switchchar = arg[2];
1902 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1904 switchchar = arg[3];
1906 queue_2stage = TRUE;
1909 /* Make -r synonymous with -f, since it is a documented alias */
1911 else if (arg[1] == 'r') switchchar = 'f';
1913 /* Make -ov synonymous with -v */
1915 else if (Ustrcmp(arg, "-ov") == 0)
1921 /* deal with --option_aliases */
1922 else if (switchchar == '-')
1924 if (Ustrcmp(argrest, "help") == 0)
1926 usage_wanted = TRUE;
1929 else if (Ustrcmp(argrest, "version") == 0)
1936 /* High-level switch on active initial letter */
1941 /* sendmail uses -Ac and -Am to control which .cf file is used;
1944 if (*argrest == '\0') { badarg = TRUE; break; }
1947 BOOL ignore = FALSE;
1952 if (*(argrest + 1) == '\0')
1956 if (!ignore) { badarg = TRUE; break; }
1960 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1961 so has no need of it. */
1964 if (*argrest == 0) i++; /* Skip over the type */
1969 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1971 /* -bd: Run in daemon mode, awaiting SMTP connections.
1972 -bdf: Ditto, but in the foreground.
1975 if (*argrest == 'd')
1977 daemon_listen = TRUE;
1978 if (*(++argrest) == 'f') background_daemon = FALSE;
1979 else if (*argrest != 0) { badarg = TRUE; break; }
1982 /* -be: Run in expansion test mode
1983 -bem: Ditto, but read a message from a file first
1986 else if (*argrest == 'e')
1988 expansion_test = checking = TRUE;
1989 if (argrest[1] == 'm')
1991 if (++i >= argc) { badarg = TRUE; break; }
1992 expansion_test_message = argv[i];
1995 if (argrest[1] != 0) { badarg = TRUE; break; }
1998 /* -bF: Run system filter test */
2000 else if (*argrest == 'F')
2002 filter_test |= FTEST_SYSTEM;
2003 if (*(++argrest) != 0) { badarg = TRUE; break; }
2004 if (++i < argc) filter_test_sfile = argv[i]; else
2006 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2011 /* -bf: Run user filter test
2012 -bfd: Set domain for filter testing
2013 -bfl: Set local part for filter testing
2014 -bfp: Set prefix for filter testing
2015 -bfs: Set suffix for filter testing
2018 else if (*argrest == 'f')
2020 if (*(++argrest) == 0)
2022 filter_test |= FTEST_USER;
2023 if (++i < argc) filter_test_ufile = argv[i]; else
2025 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2033 fprintf(stderr, "exim: string expected after %s\n", arg);
2036 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2037 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2038 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2039 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2040 else { badarg = TRUE; break; }
2044 /* -bh: Host checking - an IP address must follow. */
2046 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2048 if (++i >= argc) { badarg = TRUE; break; }
2049 sender_host_address = argv[i];
2050 host_checking = checking = log_testing_mode = TRUE;
2051 host_checking_callout = argrest[1] == 'c';
2054 /* -bi: This option is used by sendmail to initialize *the* alias file,
2055 though it has the -oA option to specify a different file. Exim has no
2056 concept of *the* alias file, but since Sun's YP make script calls
2057 sendmail this way, some support must be provided. */
2059 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2061 /* -bI: provide information, of the type to follow after a colon.
2062 This is an Exim flag. */
2064 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2066 uschar *p = &argrest[2];
2067 info_flag = CMDINFO_HELP;
2070 if (strcmpic(p, CUS"sieve") == 0)
2072 info_flag = CMDINFO_SIEVE;
2075 else if (strcmpic(p, CUS"dscp") == 0)
2077 info_flag = CMDINFO_DSCP;
2080 else if (strcmpic(p, CUS"help") == 0)
2087 /* -bm: Accept and deliver message - the default option. Reinstate
2088 receiving_message, which got turned off for all -b options. */
2090 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2092 /* -bmalware: test the filename given for malware */
2094 else if (Ustrcmp(argrest, "malware") == 0)
2096 if (++i >= argc) { badarg = TRUE; break; }
2097 malware_test_file = argv[i];
2100 /* -bnq: For locally originating messages, do not qualify unqualified
2101 addresses. In the envelope, this causes errors; in header lines they
2104 else if (Ustrcmp(argrest, "nq") == 0)
2106 allow_unqualified_sender = FALSE;
2107 allow_unqualified_recipient = FALSE;
2110 /* -bpxx: List the contents of the mail queue, in various forms. If
2111 the option is -bpc, just a queue count is needed. Otherwise, if the
2112 first letter after p is r, then order is random. */
2114 else if (*argrest == 'p')
2116 if (*(++argrest) == 'c')
2119 if (*(++argrest) != 0) badarg = TRUE;
2123 if (*argrest == 'r')
2125 list_queue_option = 8;
2128 else list_queue_option = 0;
2132 /* -bp: List the contents of the mail queue, top-level only */
2134 if (*argrest == 0) {}
2136 /* -bpu: List the contents of the mail queue, top-level undelivered */
2138 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2140 /* -bpa: List the contents of the mail queue, including all delivered */
2142 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2144 /* Unknown after -bp[r] */
2154 /* -bP: List the configuration variables given as the address list.
2155 Force -v, so configuration errors get displayed. */
2157 else if (Ustrcmp(argrest, "P") == 0)
2159 list_options = TRUE;
2160 debug_selector |= D_v;
2161 debug_file = stderr;
2164 /* -brt: Test retry configuration lookup */
2166 else if (Ustrcmp(argrest, "rt") == 0)
2168 test_retry_arg = i + 1;
2172 /* -brw: Test rewrite configuration */
2174 else if (Ustrcmp(argrest, "rw") == 0)
2176 test_rewrite_arg = i + 1;
2180 /* -bS: Read SMTP commands on standard input, but produce no replies -
2181 all errors are reported by sending messages. */
2183 else if (Ustrcmp(argrest, "S") == 0)
2184 smtp_input = smtp_batched_input = receiving_message = TRUE;
2186 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2187 on standard output. */
2189 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2191 /* -bt: address testing mode */
2193 else if (Ustrcmp(argrest, "t") == 0)
2194 address_test_mode = checking = log_testing_mode = TRUE;
2196 /* -bv: verify addresses */
2198 else if (Ustrcmp(argrest, "v") == 0)
2199 verify_address_mode = checking = log_testing_mode = TRUE;
2201 /* -bvs: verify sender addresses */
2203 else if (Ustrcmp(argrest, "vs") == 0)
2205 verify_address_mode = checking = log_testing_mode = TRUE;
2206 verify_as_sender = TRUE;
2209 /* -bV: Print version string and support details */
2211 else if (Ustrcmp(argrest, "V") == 0)
2213 printf("Exim version %s #%s built %s\n", version_string,
2214 version_cnumber, version_date);
2215 printf("%s\n", CS version_copyright);
2216 version_printed = TRUE;
2217 show_whats_supported(stdout);
2220 /* -bw: inetd wait mode, accept a listening socket as stdin */
2222 else if (*argrest == 'w')
2224 inetd_wait_mode = TRUE;
2225 background_daemon = FALSE;
2226 daemon_listen = TRUE;
2227 if (*(++argrest) != '\0')
2229 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2230 if (inetd_wait_timeout <= 0)
2232 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2242 /* -C: change configuration file list; ignore if it isn't really
2243 a change! Enforce a prefix check if required. */
2248 if(++i < argc) argrest = argv[i]; else
2249 { badarg = TRUE; break; }
2251 if (Ustrcmp(config_main_filelist, argrest) != 0)
2253 #ifdef ALT_CONFIG_PREFIX
2255 int len = Ustrlen(ALT_CONFIG_PREFIX);
2256 uschar *list = argrest;
2258 while((filename = string_nextinlist(&list, &sep, big_buffer,
2259 big_buffer_size)) != NULL)
2261 if ((Ustrlen(filename) < len ||
2262 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2263 Ustrstr(filename, "/../") != NULL) &&
2264 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2266 fprintf(stderr, "-C Permission denied\n");
2271 if (real_uid != root_uid)
2273 #ifdef TRUSTED_CONFIG_LIST
2275 if (real_uid != exim_uid
2276 #ifdef CONFIGURE_OWNER
2277 && real_uid != config_uid
2280 trusted_config = FALSE;
2283 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2286 struct stat statbuf;
2288 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2289 (statbuf.st_uid != root_uid /* owner not root */
2290 #ifdef CONFIGURE_OWNER
2291 && statbuf.st_uid != config_uid /* owner not the special one */
2294 (statbuf.st_gid != root_gid /* group not root */
2295 #ifdef CONFIGURE_GROUP
2296 && statbuf.st_gid != config_gid /* group not the special one */
2298 && (statbuf.st_mode & 020) != 0 /* group writeable */
2300 (statbuf.st_mode & 2) != 0) /* world writeable */
2302 trusted_config = FALSE;
2307 /* Well, the trust list at least is up to scratch... */
2308 void *reset_point = store_get(0);
2309 uschar *trusted_configs[32];
2313 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2315 uschar *start = big_buffer, *nl;
2316 while (*start && isspace(*start))
2320 nl = Ustrchr(start, '\n');
2323 trusted_configs[nr_configs++] = string_copy(start);
2324 if (nr_configs == 32)
2332 const uschar *list = argrest;
2334 while (trusted_config && (filename = string_nextinlist(&list,
2335 &sep, big_buffer, big_buffer_size)) != NULL)
2337 for (i=0; i < nr_configs; i++)
2339 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2342 if (i == nr_configs)
2344 trusted_config = FALSE;
2348 store_reset(reset_point);
2352 /* No valid prefixes found in trust_list file. */
2353 trusted_config = FALSE;
2359 /* Could not open trust_list file. */
2360 trusted_config = FALSE;
2364 /* Not root; don't trust config */
2365 trusted_config = FALSE;
2369 config_main_filelist = argrest;
2370 config_changed = TRUE;
2375 /* -D: set up a macro definition */
2378 #ifdef DISABLE_D_OPTION
2379 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2384 macro_item *mlast = NULL;
2387 uschar *s = argrest;
2389 while (isspace(*s)) s++;
2391 if (*s < 'A' || *s > 'Z')
2393 fprintf(stderr, "exim: macro name set by -D must start with "
2394 "an upper case letter\n");
2398 while (isalnum(*s) || *s == '_')
2400 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2404 if (ptr == 0) { badarg = TRUE; break; }
2405 while (isspace(*s)) s++;
2408 if (*s++ != '=') { badarg = TRUE; break; }
2409 while (isspace(*s)) s++;
2412 for (m = macros; m != NULL; m = m->next)
2414 if (Ustrcmp(m->name, name) == 0)
2416 fprintf(stderr, "exim: duplicated -D in command line\n");
2422 m = store_get(sizeof(macro_item) + Ustrlen(name));
2424 m->command_line = TRUE;
2425 if (mlast == NULL) macros = m; else mlast->next = m;
2426 Ustrcpy(m->name, name);
2427 m->replacement = string_copy(s);
2429 if (clmacro_count >= MAX_CLMACROS)
2431 fprintf(stderr, "exim: too many -D options on command line\n");
2434 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2440 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2441 The latter is now a no-op, retained for compatibility only. If -dd is used,
2442 debugging subprocesses of the daemon is disabled. */
2445 if (Ustrcmp(argrest, "ropcr") == 0)
2447 /* drop_cr = TRUE; */
2450 /* Use an intermediate variable so that we don't set debugging while
2451 decoding the debugging bits. */
2455 unsigned int selector = D_default;
2458 if (*argrest == 'd')
2460 debug_daemon = TRUE;
2464 decode_bits(&selector, 1, debug_notall, argrest,
2465 debug_options, debug_options_count, US"debug", 0);
2466 debug_selector = selector;
2471 /* -E: This is a local error message. This option is not intended for
2472 external use at all, but is not restricted to trusted callers because it
2473 does no harm (just suppresses certain error messages) and if Exim is run
2474 not setuid root it won't always be trusted when it generates error
2475 messages using this option. If there is a message id following -E, point
2476 message_reference at it, for logging. */
2479 local_error_message = TRUE;
2480 if (mac_ismsgid(argrest)) message_reference = argrest;
2484 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2485 option, so it looks as if historically the -oex options are also callable
2486 without the leading -o. So we have to accept them. Before the switch,
2487 anything starting -oe has been converted to -e. Exim does not support all
2488 of the sendmail error options. */
2491 if (Ustrcmp(argrest, "e") == 0)
2493 arg_error_handling = ERRORS_SENDER;
2494 errors_sender_rc = EXIT_SUCCESS;
2496 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2497 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2498 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2499 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2504 /* -F: Set sender's full name, used instead of the gecos entry from
2505 the password file. Since users can usually alter their gecos entries,
2506 there's no security involved in using this instead. The data can follow
2507 the -F or be in the next argument. */
2512 if(++i < argc) argrest = argv[i]; else
2513 { badarg = TRUE; break; }
2515 originator_name = argrest;
2516 sender_name_forced = TRUE;
2520 /* -f: Set sender's address - this value is only actually used if Exim is
2521 run by a trusted user, or if untrusted_set_sender is set and matches the
2522 address, except that the null address can always be set by any user. The
2523 test for this happens later, when the value given here is ignored when not
2524 permitted. For an untrusted user, the actual sender is still put in Sender:
2525 if it doesn't match the From: header (unless no_local_from_check is set).
2526 The data can follow the -f or be in the next argument. The -r switch is an
2527 obsolete form of -f but since there appear to be programs out there that
2528 use anything that sendmail has ever supported, better accept it - the
2529 synonymizing is done before the switch above.
2531 At this stage, we must allow domain literal addresses, because we don't
2532 know what the setting of allow_domain_literals is yet. Ditto for trailing
2533 dots and strip_trailing_dot. */
2537 int dummy_start, dummy_end;
2541 if (i+1 < argc) argrest = argv[++i]; else
2542 { badarg = TRUE; break; }
2545 sender_address = string_sprintf(""); /* Ensure writeable memory */
2548 uschar *temp = argrest + Ustrlen(argrest) - 1;
2549 while (temp >= argrest && isspace(*temp)) temp--;
2550 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2551 allow_domain_literals = TRUE;
2552 strip_trailing_dot = TRUE;
2553 #ifdef EXPERIMENTAL_INTERNATIONAL
2554 allow_utf8_domains = TRUE;
2556 sender_address = parse_extract_address(argrest, &errmess,
2557 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2558 #ifdef EXPERIMENTAL_INTERNATIONAL
2559 message_smtputf8 = string_is_utf8(sender_address);
2560 allow_utf8_domains = FALSE;
2562 allow_domain_literals = FALSE;
2563 strip_trailing_dot = FALSE;
2564 if (sender_address == NULL)
2566 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2567 return EXIT_FAILURE;
2570 sender_address_forced = TRUE;
2574 /* -G: sendmail invocation to specify that it's a gateway submission and
2575 sendmail may complain about problems instead of fixing them.
2576 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2577 not at this time complain about problems. */
2583 /* -h: Set the hop count for an incoming message. Exim does not currently
2584 support this; it always computes it by counting the Received: headers.
2585 To put it in will require a change to the spool header file format. */
2590 if(++i < argc) argrest = argv[i]; else
2591 { badarg = TRUE; break; }
2593 if (!isdigit(*argrest)) badarg = TRUE;
2597 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2598 not to be documented for sendmail but mailx (at least) uses it) */
2601 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2605 /* -L: set the identifier used for syslog; equivalent to setting
2606 syslog_processname in the config file, but needs to be an admin option. */
2609 if (*argrest == '\0')
2611 if(++i < argc) argrest = argv[i]; else
2612 { badarg = TRUE; break; }
2614 sz = Ustrlen(argrest);
2617 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2618 return EXIT_FAILURE;
2622 fprintf(stderr, "exim: the -L syslog name is too short\n");
2623 return EXIT_FAILURE;
2625 cmdline_syslog_name = argrest;
2629 receiving_message = FALSE;
2631 /* -MC: continue delivery of another message via an existing open
2632 file descriptor. This option is used for an internal call by the
2633 smtp transport when there is a pending message waiting to go to an
2634 address to which it has got a connection. Five subsequent arguments are
2635 required: transport name, host name, IP address, sequence number, and
2636 message_id. Transports may decline to create new processes if the sequence
2637 number gets too big. The channel is stdin. This (-MC) must be the last
2638 argument. There's a subsequent check that the real-uid is privileged.
2640 If we are running in the test harness. delay for a bit, to let the process
2641 that set this one up complete. This makes for repeatability of the logging,
2644 if (Ustrcmp(argrest, "C") == 0)
2646 union sockaddr_46 interface_sock;
2647 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2651 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2652 return EXIT_FAILURE;
2655 if (msg_action_arg >= 0)
2657 fprintf(stderr, "exim: incompatible arguments\n");
2658 return EXIT_FAILURE;
2661 continue_transport = argv[++i];
2662 continue_hostname = argv[++i];
2663 continue_host_address = argv[++i];
2664 continue_sequence = Uatoi(argv[++i]);
2665 msg_action = MSG_DELIVER;
2666 msg_action_arg = ++i;
2667 forced_delivery = TRUE;
2668 queue_run_pid = passed_qr_pid;
2669 queue_run_pipe = passed_qr_pipe;
2671 if (!mac_ismsgid(argv[i]))
2673 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2675 return EXIT_FAILURE;
2678 /* Set up $sending_ip_address and $sending_port */
2680 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2682 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2686 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2688 return EXIT_FAILURE;
2691 if (running_in_test_harness) millisleep(500);
2695 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2696 precedes -MC (see above). The flag indicates that the host to which
2697 Exim is connected has accepted an AUTH sequence. */
2699 else if (Ustrcmp(argrest, "CA") == 0)
2701 smtp_authenticated = TRUE;
2705 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2706 that exim is connected to supports the esmtp extension DSN */
2707 else if (Ustrcmp(argrest, "CD") == 0)
2709 smtp_use_dsn = TRUE;
2713 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2714 it preceded -MC (see above) */
2716 else if (Ustrcmp(argrest, "CP") == 0)
2718 smtp_use_pipelining = TRUE;
2722 /* -MCQ: pass on the pid of the queue-running process that started
2723 this chain of deliveries and the fd of its synchronizing pipe; this
2724 is useful only when it precedes -MC (see above) */
2726 else if (Ustrcmp(argrest, "CQ") == 0)
2728 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2730 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2735 /* -MCS: set the smtp_use_size flag; this is useful only when it
2736 precedes -MC (see above) */
2738 else if (Ustrcmp(argrest, "CS") == 0)
2740 smtp_use_size = TRUE;
2744 /* -MCT: set the tls_offered flag; this is useful only when it
2745 precedes -MC (see above). The flag indicates that the host to which
2746 Exim is connected has offered TLS support. */
2749 else if (Ustrcmp(argrest, "CT") == 0)
2756 /* -M[x]: various operations on the following list of message ids:
2757 -M deliver the messages, ignoring next retry times and thawing
2758 -Mc deliver the messages, checking next retry times, no thawing
2759 -Mf freeze the messages
2760 -Mg give up on the messages
2761 -Mt thaw the messages
2762 -Mrm remove the messages
2763 In the above cases, this must be the last option. There are also the
2764 following options which are followed by a single message id, and which
2765 act on that message. Some of them use the "recipient" addresses as well.
2766 -Mar add recipient(s)
2767 -Mmad mark all recipients delivered
2768 -Mmd mark recipients(s) delivered
2770 -Mset load a message for use with -be
2772 -Mvc show copy (of whole message, in RFC 2822 format)
2777 else if (*argrest == 0)
2779 msg_action = MSG_DELIVER;
2780 forced_delivery = deliver_force_thaw = TRUE;
2782 else if (Ustrcmp(argrest, "ar") == 0)
2784 msg_action = MSG_ADD_RECIPIENT;
2785 one_msg_action = TRUE;
2787 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2788 else if (Ustrcmp(argrest, "es") == 0)
2790 msg_action = MSG_EDIT_SENDER;
2791 one_msg_action = TRUE;
2793 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2794 else if (Ustrcmp(argrest, "g") == 0)
2796 msg_action = MSG_DELIVER;
2797 deliver_give_up = TRUE;
2799 else if (Ustrcmp(argrest, "mad") == 0)
2801 msg_action = MSG_MARK_ALL_DELIVERED;
2803 else if (Ustrcmp(argrest, "md") == 0)
2805 msg_action = MSG_MARK_DELIVERED;
2806 one_msg_action = TRUE;
2808 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2809 else if (Ustrcmp(argrest, "set") == 0)
2811 msg_action = MSG_LOAD;
2812 one_msg_action = TRUE;
2814 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2815 else if (Ustrcmp(argrest, "vb") == 0)
2817 msg_action = MSG_SHOW_BODY;
2818 one_msg_action = TRUE;
2820 else if (Ustrcmp(argrest, "vc") == 0)
2822 msg_action = MSG_SHOW_COPY;
2823 one_msg_action = TRUE;
2825 else if (Ustrcmp(argrest, "vh") == 0)
2827 msg_action = MSG_SHOW_HEADER;
2828 one_msg_action = TRUE;
2830 else if (Ustrcmp(argrest, "vl") == 0)
2832 msg_action = MSG_SHOW_LOG;
2833 one_msg_action = TRUE;
2835 else { badarg = TRUE; break; }
2837 /* All the -Mxx options require at least one message id. */
2839 msg_action_arg = i + 1;
2840 if (msg_action_arg >= argc)
2842 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2843 return EXIT_FAILURE;
2846 /* Some require only message ids to follow */
2848 if (!one_msg_action)
2851 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2853 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2855 return EXIT_FAILURE;
2857 goto END_ARG; /* Remaining args are ids */
2860 /* Others require only one message id, possibly followed by addresses,
2861 which will be handled as normal arguments. */
2865 if (!mac_ismsgid(argv[msg_action_arg]))
2867 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2868 argv[msg_action_arg], arg);
2869 return EXIT_FAILURE;
2876 /* Some programs seem to call the -om option without the leading o;
2877 for sendmail it askes for "me too". Exim always does this. */
2880 if (*argrest != 0) badarg = TRUE;
2884 /* -N: don't do delivery - a debugging option that stops transports doing
2885 their thing. It implies debugging at the D_v level. */
2890 dont_deliver = TRUE;
2891 debug_selector |= D_v;
2892 debug_file = stderr;
2898 /* -n: This means "don't alias" in sendmail, apparently.
2899 For normal invocations, it has no effect.
2900 It may affect some other options. */
2906 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2907 option to the specified value. This form uses long names. We need to handle
2908 -O option=value and -Ooption=value. */
2915 fprintf(stderr, "exim: string expected after -O\n");
2923 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2926 if (*argrest == 'A')
2928 alias_arg = argrest + 1;
2929 if (alias_arg[0] == 0)
2931 if (i+1 < argc) alias_arg = argv[++i]; else
2933 fprintf(stderr, "exim: string expected after -oA\n");
2939 /* -oB: Set a connection message max value for remote deliveries */
2941 else if (*argrest == 'B')
2943 uschar *p = argrest + 1;
2946 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2948 connection_max_messages = 1;
2957 fprintf(stderr, "exim: number expected after -oB\n");
2960 connection_max_messages = Uatoi(p);
2964 /* -odb: background delivery */
2966 else if (Ustrcmp(argrest, "db") == 0)
2968 synchronous_delivery = FALSE;
2969 arg_queue_only = FALSE;
2970 queue_only_set = TRUE;
2973 /* -odf: foreground delivery (smail-compatible option); same effect as
2974 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2977 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2979 synchronous_delivery = TRUE;
2980 arg_queue_only = FALSE;
2981 queue_only_set = TRUE;
2984 /* -odq: queue only */
2986 else if (Ustrcmp(argrest, "dq") == 0)
2988 synchronous_delivery = FALSE;
2989 arg_queue_only = TRUE;
2990 queue_only_set = TRUE;
2993 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2994 but no remote delivery */
2996 else if (Ustrcmp(argrest, "dqs") == 0)
2999 arg_queue_only = FALSE;
3000 queue_only_set = TRUE;
3003 /* -oex: Sendmail error flags. As these are also accepted without the
3004 leading -o prefix, for compatibility with vacation and other callers,
3005 they are handled with -e above. */
3007 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3008 -oitrue: Another sendmail syntax for the same */
3010 else if (Ustrcmp(argrest, "i") == 0 ||
3011 Ustrcmp(argrest, "itrue") == 0)
3014 /* -oM*: Set various characteristics for an incoming message; actually
3015 acted on for trusted callers only. */
3017 else if (*argrest == 'M')
3021 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3025 /* -oMa: Set sender host address */
3027 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3029 /* -oMaa: Set authenticator name */
3031 else if (Ustrcmp(argrest, "Maa") == 0)
3032 sender_host_authenticated = argv[++i];
3034 /* -oMas: setting authenticated sender */
3036 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3038 /* -oMai: setting authenticated id */
3040 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3042 /* -oMi: Set incoming interface address */
3044 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3046 /* -oMm: Message reference */
3048 else if (Ustrcmp(argrest, "Mm") == 0)
3050 if (!mac_ismsgid(argv[i+1]))
3052 fprintf(stderr,"-oMm must be a valid message ID\n");
3055 if (!trusted_config)
3057 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3060 message_reference = argv[++i];
3063 /* -oMr: Received protocol */
3065 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3067 /* -oMs: Set sender host name */
3069 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3071 /* -oMt: Set sender ident */
3073 else if (Ustrcmp(argrest, "Mt") == 0)
3075 sender_ident_set = TRUE;
3076 sender_ident = argv[++i];
3079 /* Else a bad argument */
3088 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3089 seem to call this as -m (undocumented), so that is also accepted (see
3092 else if (Ustrcmp(argrest, "m") == 0) {}
3094 /* -oo: An ancient flag for old-style addresses which still seems to
3095 crop up in some calls (see in SCO). */
3097 else if (Ustrcmp(argrest, "o") == 0) {}
3099 /* -oP <name>: set pid file path for daemon */
3101 else if (Ustrcmp(argrest, "P") == 0)
3102 override_pid_file_path = argv[++i];
3104 /* -or <n>: set timeout for non-SMTP acceptance
3105 -os <n>: set timeout for SMTP acceptance */
3107 else if (*argrest == 'r' || *argrest == 's')
3109 int *tp = (*argrest == 'r')?
3110 &arg_receive_timeout : &arg_smtp_receive_timeout;
3111 if (argrest[1] == 0)
3113 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3115 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3118 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3123 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3125 else if (Ustrcmp(argrest, "X") == 0)
3126 override_local_interfaces = argv[++i];
3128 /* Unknown -o argument */
3134 /* -ps: force Perl startup; -pd force delayed Perl startup */
3138 if (*argrest == 's' && argrest[1] == 0)
3140 perl_start_option = 1;
3143 if (*argrest == 'd' && argrest[1] == 0)
3145 perl_start_option = -1;
3150 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3151 which sets the host protocol and host name */
3155 if (i+1 < argc) argrest = argv[++i]; else
3156 { badarg = TRUE; break; }
3161 uschar *hn = Ustrchr(argrest, ':');
3164 received_protocol = argrest;
3168 received_protocol = string_copyn(argrest, hn - argrest);
3169 sender_host_name = hn + 1;
3176 receiving_message = FALSE;
3177 if (queue_interval >= 0)
3179 fprintf(stderr, "exim: -q specified more than once\n");
3183 /* -qq...: Do queue runs in a 2-stage manner */
3185 if (*argrest == 'q')
3187 queue_2stage = TRUE;
3191 /* -qi...: Do only first (initial) deliveries */
3193 if (*argrest == 'i')
3195 queue_run_first_delivery = TRUE;
3199 /* -qf...: Run the queue, forcing deliveries
3200 -qff..: Ditto, forcing thawing as well */
3202 if (*argrest == 'f')
3204 queue_run_force = TRUE;
3205 if (*(++argrest) == 'f')
3207 deliver_force_thaw = TRUE;
3212 /* -q[f][f]l...: Run the queue only on local deliveries */
3214 if (*argrest == 'l')
3216 queue_run_local = TRUE;
3220 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3221 optionally starting from a given message id. */
3223 if (*argrest == 0 &&
3224 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3227 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3228 start_queue_run_id = argv[++i];
3229 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3230 stop_queue_run_id = argv[++i];
3233 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3234 optionally local only. */
3239 queue_interval = readconf_readtime(argrest, 0, FALSE);
3241 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3242 if (queue_interval <= 0)
3244 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3251 case 'R': /* Synonymous with -qR... */
3252 receiving_message = FALSE;
3254 /* -Rf: As -R (below) but force all deliveries,
3255 -Rff: Ditto, but also thaw all frozen messages,
3256 -Rr: String is regex
3257 -Rrf: Regex and force
3258 -Rrff: Regex and force and thaw
3260 in all cases provided there are no further characters in this
3266 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3268 if (Ustrcmp(argrest, rsopts[i]) == 0)
3270 if (i != 2) queue_run_force = TRUE;
3271 if (i >= 2) deliver_selectstring_regex = TRUE;
3272 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3273 argrest += Ustrlen(rsopts[i]);
3278 /* -R: Set string to match in addresses for forced queue run to
3279 pick out particular messages. */
3283 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3285 fprintf(stderr, "exim: string expected after -R\n");
3289 else deliver_selectstring = argrest;
3293 /* -r: an obsolete synonym for -f (see above) */
3296 /* -S: Like -R but works on sender. */
3298 case 'S': /* Synonymous with -qS... */
3299 receiving_message = FALSE;
3301 /* -Sf: As -S (below) but force all deliveries,
3302 -Sff: Ditto, but also thaw all frozen messages,
3303 -Sr: String is regex
3304 -Srf: Regex and force
3305 -Srff: Regex and force and thaw
3307 in all cases provided there are no further characters in this
3313 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3315 if (Ustrcmp(argrest, rsopts[i]) == 0)
3317 if (i != 2) queue_run_force = TRUE;
3318 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3319 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3320 argrest += Ustrlen(rsopts[i]);
3325 /* -S: Set string to match in addresses for forced queue run to
3326 pick out particular messages. */
3330 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3332 fprintf(stderr, "exim: string expected after -S\n");
3336 else deliver_selectstring_sender = argrest;
3339 /* -Tqt is an option that is exclusively for use by the testing suite.
3340 It is not recognized in other circumstances. It allows for the setting up
3341 of explicit "queue times" so that various warning/retry things can be
3342 tested. Otherwise variability of clock ticks etc. cause problems. */
3345 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3346 fudged_queue_times = argv[++i];
3351 /* -t: Set flag to extract recipients from body of message. */
3354 if (*argrest == 0) extract_recipients = TRUE;
3356 /* -ti: Set flag to extract recipients from body of message, and also
3357 specify that dot does not end the message. */
3359 else if (Ustrcmp(argrest, "i") == 0)
3361 extract_recipients = TRUE;
3365 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3368 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3375 /* -U: This means "initial user submission" in sendmail, apparently. The
3376 doc claims that in future sendmail may refuse syntactically invalid
3377 messages instead of fixing them. For the moment, we just ignore it. */
3383 /* -v: verify things - this is a very low-level debugging */
3388 debug_selector |= D_v;
3389 debug_file = stderr;
3395 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3397 The -x flag tells the sendmail command that mail from a local
3398 mail program has National Language Support (NLS) extended characters
3399 in the body of the mail item. The sendmail command can send mail with
3400 extended NLS characters across networks that normally corrupts these
3403 As Exim is 8-bit clean, it just ignores this flag. */
3406 if (*argrest != 0) badarg = TRUE;
3409 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3410 logs to that file. We swallow the parameter and otherwise ignore it. */
3413 if (*argrest == '\0')
3416 fprintf(stderr, "exim: string expected after -X\n");
3422 if (*argrest == '\0')
3423 if (++i < argc) log_oneline = argv[i]; else
3425 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3430 /* All other initial characters are errors */
3435 } /* End of high-level switch statement */
3437 /* Failed to recognize the option, or syntax error */
3441 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3442 "option %s\n", arg);
3448 /* If -R or -S have been specified without -q, assume a single queue run. */
3450 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3451 queue_interval < 0) queue_interval = 0;
3455 /* If usage_wanted is set we call the usage function - which never returns */
3456 if (usage_wanted) exim_usage(called_as);
3458 /* Arguments have been processed. Check for incompatibilities. */
3460 (smtp_input || extract_recipients || recipients_arg < argc) &&
3461 (daemon_listen || queue_interval >= 0 || bi_option ||
3462 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3463 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3466 msg_action_arg > 0 &&
3467 (daemon_listen || queue_interval >= 0 || list_options ||
3468 (checking && msg_action != MSG_LOAD) ||
3469 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3472 (daemon_listen || queue_interval >= 0) &&
3473 (sender_address != NULL || list_options || list_queue || checking ||
3477 daemon_listen && queue_interval == 0
3480 inetd_wait_mode && queue_interval >= 0
3484 (checking || smtp_input || extract_recipients ||
3485 filter_test != FTEST_NONE || bi_option)
3488 verify_address_mode &&
3489 (address_test_mode || smtp_input || extract_recipients ||
3490 filter_test != FTEST_NONE || bi_option)
3493 address_test_mode && (smtp_input || extract_recipients ||
3494 filter_test != FTEST_NONE || bi_option)
3497 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3501 deliver_selectstring != NULL && queue_interval < 0
3504 msg_action == MSG_LOAD &&
3505 (!expansion_test || expansion_test_message != NULL)
3509 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3513 /* If debugging is set up, set the file and the file descriptor to pass on to
3514 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3515 to run in the foreground. */
3517 if (debug_selector != 0)
3519 debug_file = stderr;
3520 debug_fd = fileno(debug_file);
3521 background_daemon = FALSE;
3522 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3523 if (debug_selector != D_v) /* -v only doesn't show this */
3525 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3526 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3528 if (!version_printed)
3529 show_whats_supported(stderr);
3533 /* When started with root privilege, ensure that the limits on the number of
3534 open files and the number of processes (where that is accessible) are
3535 sufficiently large, or are unset, in case Exim has been called from an
3536 environment where the limits are screwed down. Not all OS have the ability to
3537 change some of these limits. */
3541 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3547 #ifdef RLIMIT_NOFILE
3548 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3550 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3552 rlp.rlim_cur = rlp.rlim_max = 0;
3555 /* I originally chose 1000 as a nice big number that was unlikely to
3556 be exceeded. It turns out that some older OS have a fixed upper limit of
3559 if (rlp.rlim_cur < 1000)
3561 rlp.rlim_cur = rlp.rlim_max = 1000;
3562 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3564 rlp.rlim_cur = rlp.rlim_max = 256;
3565 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3566 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3573 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3575 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3577 rlp.rlim_cur = rlp.rlim_max = 0;
3580 #ifdef RLIM_INFINITY
3581 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3583 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3585 if (rlp.rlim_cur < 1000)
3587 rlp.rlim_cur = rlp.rlim_max = 1000;
3589 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3590 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3596 /* Exim is normally entered as root (but some special configurations are
3597 possible that don't do this). However, it always spins off sub-processes that
3598 set their uid and gid as required for local delivery. We don't want to pass on
3599 any extra groups that root may belong to, so we want to get rid of them all at
3602 We need to obey setgroups() at this stage, before possibly giving up root
3603 privilege for a changed configuration file, but later on we might need to
3604 check on the additional groups for the admin user privilege - can't do that
3605 till after reading the config, which might specify the exim gid. Therefore,
3606 save the group list here first. */
3608 group_count = getgroups(NGROUPS_MAX, group_list);
3609 if (group_count < 0)
3611 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3615 /* There is a fundamental difference in some BSD systems in the matter of
3616 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3617 known not to be different. On the "different" systems there is a single group
3618 list, and the first entry in it is the current group. On all other versions of
3619 Unix there is a supplementary group list, which is in *addition* to the current
3620 group. Consequently, to get rid of all extraneous groups on a "standard" system
3621 you pass over 0 groups to setgroups(), while on a "different" system you pass
3622 over a single group - the current group, which is always the first group in the
3623 list. Calling setgroups() with zero groups on a "different" system results in
3624 an error return. The following code should cope with both types of system.
3626 However, if this process isn't running as root, setgroups() can't be used
3627 since you have to be root to run it, even if throwing away groups. Not being
3628 root here happens only in some unusual configurations. We just ignore the
3631 if (setgroups(0, NULL) != 0)
3633 if (setgroups(1, group_list) != 0 && !unprivileged)
3635 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3640 /* If the configuration file name has been altered by an argument on the
3641 command line (either a new file name or a macro definition) and the caller is
3642 not root, or if this is a filter testing run, remove any setuid privilege the
3643 program has and run as the underlying user.
3645 The exim user is locked out of this, which severely restricts the use of -C
3648 Otherwise, set the real ids to the effective values (should be root unless run
3649 from inetd, which it can either be root or the exim uid, if one is configured).
3651 There is a private mechanism for bypassing some of this, in order to make it
3652 possible to test lots of configurations automatically, without having either to
3653 recompile each time, or to patch in an actual configuration file name and other
3654 values (such as the path name). If running in the test harness, pretend that
3655 configuration file changes and macro definitions haven't happened. */
3658 (!trusted_config || /* Config changed, or */
3659 !macros_trusted()) && /* impermissible macros and */
3660 real_uid != root_uid && /* Not root, and */
3661 !running_in_test_harness /* Not fudged */
3663 expansion_test /* expansion testing */
3665 filter_test != FTEST_NONE) /* Filter testing */
3667 setgroups(group_count, group_list);
3668 exim_setugid(real_uid, real_gid, FALSE,
3669 US"-C, -D, -be or -bf forces real uid");
3670 removed_privilege = TRUE;
3672 /* In the normal case when Exim is called like this, stderr is available
3673 and should be used for any logging information because attempts to write
3674 to the log will usually fail. To arrange this, we unset really_exim. However,
3675 if no stderr is available there is no point - we might as well have a go
3676 at the log (if it fails, syslog will be written).
3678 Note that if the invoker is Exim, the logs remain available. Messing with
3679 this causes unlogged successful deliveries. */
3681 if ((log_stderr != NULL) && (real_uid != exim_uid))
3682 really_exim = FALSE;
3685 /* Privilege is to be retained for the moment. It may be dropped later,
3686 depending on the job that this Exim process has been asked to do. For now, set
3687 the real uid to the effective so that subsequent re-execs of Exim are done by a
3690 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3692 /* If testing a filter, open the file(s) now, before wasting time doing other
3693 setups and reading the message. */
3695 if ((filter_test & FTEST_SYSTEM) != 0)
3697 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3700 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3702 return EXIT_FAILURE;
3706 if ((filter_test & FTEST_USER) != 0)
3708 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3711 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3713 return EXIT_FAILURE;
3717 /* Initialise lookup_list
3718 If debugging, already called above via version reporting.
3719 In either case, we initialise the list of available lookups while running
3720 as root. All dynamically modules are loaded from a directory which is
3721 hard-coded into the binary and is code which, if not a module, would be
3722 part of Exim already. Ability to modify the content of the directory
3723 is equivalent to the ability to modify a setuid binary!
3725 This needs to happen before we read the main configuration. */
3728 #ifdef EXPERIMENTAL_INTERNATIONAL
3729 if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3732 /* Read the main runtime configuration data; this gives up if there
3733 is a failure. It leaves the configuration file open so that the subsequent
3734 configuration data for delivery can be read if needed. */
3738 /* If an action on specific messages is requested, or if a daemon or queue
3739 runner is being started, we need to know if Exim was called by an admin user.
3740 This is the case if the real user is root or exim, or if the real group is
3741 exim, or if one of the supplementary groups is exim or a group listed in
3742 admin_groups. We don't fail all message actions immediately if not admin_user,
3743 since some actions can be performed by non-admin users. Instead, set admin_user
3744 for later interrogation. */
3746 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3751 for (i = 0; i < group_count; i++)
3753 if (group_list[i] == exim_gid) admin_user = TRUE;
3754 else if (admin_groups != NULL)
3756 for (j = 1; j <= (int)(admin_groups[0]); j++)
3757 if (admin_groups[j] == group_list[i])
3758 { admin_user = TRUE; break; }
3760 if (admin_user) break;
3764 /* Another group of privileged users are the trusted users. These are root,
3765 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3766 are permitted to specify sender_addresses with -f on the command line, and
3767 other message parameters as well. */
3769 if (real_uid == root_uid || real_uid == exim_uid)
3770 trusted_caller = TRUE;
3775 if (trusted_users != NULL)
3777 for (i = 1; i <= (int)(trusted_users[0]); i++)
3778 if (trusted_users[i] == real_uid)
3779 { trusted_caller = TRUE; break; }
3782 if (!trusted_caller && trusted_groups != NULL)
3784 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3786 if (trusted_groups[i] == real_gid)
3787 trusted_caller = TRUE;
3788 else for (j = 0; j < group_count; j++)
3790 if (trusted_groups[i] == group_list[j])
3791 { trusted_caller = TRUE; break; }
3793 if (trusted_caller) break;
3798 /* Handle the decoding of logging options. */
3800 decode_bits(log_selector, log_selector_size, log_notall,
3801 log_selector_string, log_options, log_options_count, US"log", 0);
3806 debug_printf("configuration file is %s\n", config_main_filename);
3807 debug_printf("log selectors =");
3808 for (i = 0; i < log_selector_size; i++)
3809 debug_printf(" %08x", log_selector[i]);
3813 /* If domain literals are not allowed, check the sender address that was
3814 supplied with -f. Ditto for a stripped trailing dot. */
3816 if (sender_address != NULL)
3818 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3820 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3821 "allowed\n", sender_address);
3822 return EXIT_FAILURE;
3824 if (f_end_dot && !strip_trailing_dot)
3826 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3827 "(trailing dot not allowed)\n", sender_address);
3828 return EXIT_FAILURE;
3832 /* See if an admin user overrode our logging. */
3834 if (cmdline_syslog_name != NULL)
3838 syslog_processname = cmdline_syslog_name;
3839 log_file_path = string_copy(CUS"syslog");
3843 /* not a panic, non-privileged users should not be able to spam paniclog */
3845 "exim: you lack sufficient privilege to specify syslog process name\n");
3846 return EXIT_FAILURE;
3850 /* Paranoia check of maximum lengths of certain strings. There is a check
3851 on the length of the log file path in log.c, which will come into effect
3852 if there are any calls to write the log earlier than this. However, if we
3853 get this far but the string is very long, it is better to stop now than to
3854 carry on and (e.g.) receive a message and then have to collapse. The call to
3855 log_write() from here will cause the ultimate panic collapse if the complete
3856 file name exceeds the buffer length. */
3858 if (Ustrlen(log_file_path) > 200)
3859 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3860 "log_file_path is longer than 200 chars: aborting");
3862 if (Ustrlen(pid_file_path) > 200)
3863 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3864 "pid_file_path is longer than 200 chars: aborting");
3866 if (Ustrlen(spool_directory) > 200)
3867 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3868 "spool_directory is longer than 200 chars: aborting");
3870 /* Length check on the process name given to syslog for its TAG field,
3871 which is only permitted to be 32 characters or less. See RFC 3164. */
3873 if (Ustrlen(syslog_processname) > 32)
3874 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3875 "syslog_processname is longer than 32 chars: aborting");
3881 log_write(0, LOG_MAIN, "%s", log_oneline);
3882 return EXIT_SUCCESS;
3885 return EXIT_FAILURE;
3888 /* In some operating systems, the environment variable TMPDIR controls where
3889 temporary files are created; Exim doesn't use these (apart from when delivering
3890 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3891 If TMPDIR is found in the environment, reset it to the value defined in the
3892 TMPDIR macro, if this macro is defined. */
3897 for (p = USS environ; *p != NULL; p++)
3899 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3900 Ustrcmp(*p+7, TMPDIR) != 0)
3902 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3903 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3905 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3911 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3912 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3913 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3914 called by a user who has set the TZ variable. This then affects the timestamps
3915 in log files and in Received: headers, and any created Date: header lines. The
3916 required timezone is settable in the configuration file, so nothing can be done
3917 about this earlier - but hopefully nothing will normally be logged earlier than
3918 this. We have to make a new environment if TZ is wrong, but don't bother if
3919 timestamps_utc is set, because then all times are in UTC anyway. */
3921 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3923 timestamps_utc = TRUE;
3927 uschar *envtz = US getenv("TZ");
3928 if ((envtz == NULL && timezone_string != NULL) ||
3930 (timezone_string == NULL ||
3931 Ustrcmp(timezone_string, envtz) != 0)))
3933 uschar **p = USS environ;
3937 while (*p++ != NULL) count++;
3938 if (envtz == NULL) count++;
3939 newp = new = malloc(sizeof(uschar *) * (count + 1));
3940 for (p = USS environ; *p != NULL; p++)
3942 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3945 if (timezone_string != NULL)
3947 *newp = malloc(Ustrlen(timezone_string) + 4);
3948 sprintf(CS *newp++, "TZ=%s", timezone_string);
3953 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3954 tod_stamp(tod_log));
3958 /* Handle the case when we have removed the setuid privilege because of -C or
3959 -D. This means that the caller of Exim was not root.
3961 There is a problem if we were running as the Exim user. The sysadmin may
3962 expect this case to retain privilege because "the binary was called by the
3963 Exim user", but it hasn't, because either the -D option set macros, or the
3964 -C option set a non-trusted configuration file. There are two possibilities:
3966 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3967 to do message deliveries. Thus, the fact that it is running as a
3968 non-privileged user is plausible, and might be wanted in some special
3969 configurations. However, really_exim will have been set false when
3970 privilege was dropped, to stop Exim trying to write to its normal log
3971 files. Therefore, re-enable normal log processing, assuming the sysadmin
3972 has set up the log directory correctly.
3974 (2) If deliver_drop_privilege is not set, the configuration won't work as
3975 apparently intended, and so we log a panic message. In order to retain
3976 root for -C or -D, the caller must either be root or be invoking a
3977 trusted configuration file (when deliver_drop_privilege is false). */
3979 if (removed_privilege && (!trusted_config || macros != NULL) &&
3980 real_uid == exim_uid)
3982 if (deliver_drop_privilege)
3983 really_exim = TRUE; /* let logging work normally */
3985 log_write(0, LOG_MAIN|LOG_PANIC,
3986 "exim user lost privilege for using %s option",
3987 trusted_config? "-D" : "-C");
3990 /* Start up Perl interpreter if Perl support is configured and there is a
3991 perl_startup option, and the configuration or the command line specifies
3992 initializing starting. Note that the global variables are actually called
3993 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3996 if (perl_start_option != 0)
3997 opt_perl_at_start = (perl_start_option > 0);
3998 if (opt_perl_at_start && opt_perl_startup != NULL)
4001 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4002 errstr = init_perl(opt_perl_startup);
4005 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
4006 return EXIT_FAILURE;
4008 opt_perl_started = TRUE;
4010 #endif /* EXIM_PERL */
4012 /* Log the arguments of the call if the configuration file said so. This is
4013 a debugging feature for finding out what arguments certain MUAs actually use.
4014 Don't attempt it if logging is disabled, or if listing variables or if
4015 verifying/testing addresses or expansions. */
4017 if (((debug_selector & D_any) != 0 || LOGGING(arguments))
4018 && really_exim && !list_options && !checking)
4021 uschar *p = big_buffer;
4023 Ustrcpy(p, "cwd= (failed)");
4024 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
4026 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4028 for (i = 0; i < argc; i++)
4030 int len = Ustrlen(argv[i]);
4031 const uschar *printing;
4033 if (p + len + 8 >= big_buffer + big_buffer_size)
4036 log_write(0, LOG_MAIN, "%s", big_buffer);
4037 Ustrcpy(big_buffer, "...");
4040 printing = string_printing(argv[i]);
4041 if (printing[0] == 0) quote = US"\""; else
4043 const uschar *pp = printing;
4045 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4047 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4048 (p - big_buffer) - 4), printing, quote);
4052 if (LOGGING(arguments))
4053 log_write(0, LOG_MAIN, "%s", big_buffer);
4055 debug_printf("%s\n", big_buffer);
4058 /* Set the working directory to be the top-level spool directory. We don't rely
4059 on this in the code, which always uses fully qualified names, but it's useful
4060 for core dumps etc. Don't complain if it fails - the spool directory might not
4061 be generally accessible and calls with the -C option (and others) have lost
4062 privilege by now. Before the chdir, we try to ensure that the directory exists.
4065 if (Uchdir(spool_directory) != 0)
4068 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4069 dummy = /* quieten compiler */ Uchdir(spool_directory);
4072 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4073 alias file. Exim doesn't have such a concept, but this call is screwed into
4074 Sun's YP makefiles. Handle this by calling a configured script, as the real
4075 user who called Exim. The -oA option can be used to pass an argument to the
4080 (void)fclose(config_file);
4081 if (bi_command != NULL)
4085 argv[i++] = bi_command;
4086 if (alias_arg != NULL) argv[i++] = alias_arg;
4089 setgroups(group_count, group_list);
4090 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4092 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4093 (argv[1] == NULL)? US"" : argv[1]);
4095 execv(CS argv[0], (char *const *)argv);
4096 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
4101 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4106 /* We moved the admin/trusted check to be immediately after reading the
4107 configuration file. We leave these prints here to ensure that syslog setup,
4108 logfile setup, and so on has already happened. */
4110 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4111 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4113 /* Only an admin user may start the daemon or force a queue run in the default
4114 configuration, but the queue run restriction can be relaxed. Only an admin
4115 user may request that a message be returned to its sender forthwith. Only an
4116 admin user may specify a debug level greater than D_v (because it might show
4117 passwords, etc. in lookup queries). Only an admin user may request a queue
4118 count. Only an admin user can use the test interface to scan for email
4119 (because Exim will be in the spool dir and able to look at mails). */
4123 BOOL debugset = (debug_selector & ~D_v) != 0;
4124 if (deliver_give_up || daemon_listen || malware_test_file ||
4125 (count_queue && queue_list_requires_admin) ||
4126 (list_queue && queue_list_requires_admin) ||
4127 (queue_interval >= 0 && prod_requires_admin) ||
4128 (debugset && !running_in_test_harness))
4130 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4135 /* If the real user is not root or the exim uid, the argument for passing
4136 in an open TCP/IP connection for another message is not permitted, nor is
4137 running with the -N option for any delivery action, unless this call to exim is
4138 one that supplied an input message, or we are using a patched exim for
4139 regression testing. */
4141 if (real_uid != root_uid && real_uid != exim_uid &&
4142 (continue_hostname != NULL ||
4144 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4145 )) && !running_in_test_harness)
4147 fprintf(stderr, "exim: Permission denied\n");
4148 return EXIT_FAILURE;
4151 /* If the caller is not trusted, certain arguments are ignored when running for
4152 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4153 Note that authority for performing certain actions on messages is tested in the
4154 queue_action() function. */
4156 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4158 sender_host_name = sender_host_address = interface_address =
4159 sender_ident = received_protocol = NULL;
4160 sender_host_port = interface_port = 0;
4161 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4164 /* If a sender host address is set, extract the optional port number off the
4165 end of it and check its syntax. Do the same thing for the interface address.
4166 Exim exits if the syntax is bad. */
4170 if (sender_host_address != NULL)
4171 sender_host_port = check_port(sender_host_address);
4172 if (interface_address != NULL)
4173 interface_port = check_port(interface_address);
4176 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4181 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4182 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4186 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4187 return EXIT_FAILURE;
4191 /* If an SMTP message is being received check to see if the standard input is a
4192 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4193 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4198 union sockaddr_46 inetd_sock;
4199 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4200 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4202 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4203 if (family == AF_INET || family == AF_INET6)
4205 union sockaddr_46 interface_sock;
4206 size = sizeof(interface_sock);
4208 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4209 interface_address = host_ntoa(-1, &interface_sock, NULL,
4212 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4214 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4217 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4218 NULL, &sender_host_port);
4219 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4220 "inetd is not supported when mua_wrapper is set");
4225 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4226 return EXIT_FAILURE;
4232 /* If the load average is going to be needed while receiving a message, get it
4233 now for those OS that require the first call to os_getloadavg() to be done as
4234 root. There will be further calls later for each message received. */
4236 #ifdef LOAD_AVG_NEEDS_ROOT
4237 if (receiving_message &&
4238 (queue_only_load >= 0 ||
4239 (is_inetd && smtp_load_reserve >= 0)
4242 load_average = OS_GETLOADAVG();
4246 /* The queue_only configuration option can be overridden by -odx on the command
4247 line, except that if queue_only_override is false, queue_only cannot be unset
4248 from the command line. */
4250 if (queue_only_set && (queue_only_override || arg_queue_only))
4251 queue_only = arg_queue_only;
4253 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4256 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4257 if (arg_smtp_receive_timeout >= 0)
4258 smtp_receive_timeout = arg_smtp_receive_timeout;
4260 /* If Exim was started with root privilege, unless we have already removed the
4261 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4262 except when starting the daemon or doing some kind of delivery or address
4263 testing (-bt). These are the only cases when root need to be retained. We run
4264 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4265 retained only for starting the daemon. We always do the initgroups() in this
4266 situation (controlled by the TRUE below), in order to be as close as possible
4267 to the state Exim usually runs in. */
4269 if (!unprivileged && /* originally had root AND */
4270 !removed_privilege && /* still got root AND */
4271 !daemon_listen && /* not starting the daemon */
4272 queue_interval <= 0 && /* (either kind of daemon) */
4274 deliver_drop_privilege || /* requested unprivileged */
4276 queue_interval < 0 && /* not running the queue */
4277 (msg_action_arg < 0 || /* and */
4278 msg_action != MSG_DELIVER) && /* not delivering and */
4279 (!checking || !address_test_mode) /* not address checking */
4283 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4286 /* When we are retaining a privileged uid, we still change to the exim gid. */
4291 rv = setgid(exim_gid);
4292 /* Impact of failure is that some stuff might end up with an incorrect group.
4293 We track this for failures from root, since any attempt to change privilege
4294 by root should succeed and failures should be examined. For non-root,
4295 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4296 no need to complain then. */
4299 if (!(unprivileged || removed_privilege))
4302 "exim: changing group failed: %s\n", strerror(errno));
4306 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4307 (long int)exim_gid, strerror(errno));
4311 /* Handle a request to scan a file for malware */
4312 if (malware_test_file)
4314 #ifdef WITH_CONTENT_SCAN
4316 set_process_info("scanning file for malware");
4317 result = malware_in_file(malware_test_file);
4320 printf("No malware found.\n");
4325 printf("Malware lookup returned non-okay/fail: %d\n", result);
4329 printf("Malware found: %s\n", malware_name);
4331 printf("Malware scan detected malware of unknown name.\n");
4333 printf("Malware scanning not enabled at compile time.\n");
4338 /* Handle a request to list the delivery queue */
4342 set_process_info("listing the queue");
4343 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4347 /* Handle a request to count the delivery queue */
4351 set_process_info("counting the queue");
4356 /* Handle actions on specific messages, except for the force delivery and
4357 message load actions, which are done below. Some actions take a whole list of
4358 message ids, which are known to continue up to the end of the arguments. Others
4359 take a single message id and then operate on the recipients list. */
4361 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4363 int yield = EXIT_SUCCESS;
4364 set_process_info("acting on specified messages");
4366 if (!one_msg_action)
4368 for (i = msg_action_arg; i < argc; i++)
4369 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4370 yield = EXIT_FAILURE;
4373 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4374 recipients_arg)) yield = EXIT_FAILURE;
4378 /* We used to set up here to skip reading the ACL section, on
4379 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4380 Now, since the intro of the ${acl } expansion, ACL definitions may be
4381 needed in transports so we lost the optimisation. */
4385 /* The configuration data will have been read into POOL_PERM because we won't
4386 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4387 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4388 configuration were read into POOL_MAIN, because we don't do any resets till
4389 later on. However, it seems right, and it does ensure that both pools get used.
4392 store_pool = POOL_MAIN;
4394 /* Handle the -brt option. This is for checking out retry configurations.
4395 The next three arguments are a domain name or a complete address, and
4396 optionally two error numbers. All it does is to call the function that
4397 scans the retry configuration data. */
4399 if (test_retry_arg >= 0)
4401 retry_config *yield;
4402 int basic_errno = 0;
4406 if (test_retry_arg >= argc)
4408 printf("-brt needs a domain or address argument\n");
4409 exim_exit(EXIT_FAILURE);
4411 s1 = argv[test_retry_arg++];
4414 /* If the first argument contains no @ and no . it might be a local user
4415 or it might be a single-component name. Treat as a domain. */
4417 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4419 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4420 "being \ntreated as a one-component domain, not as a local part.\n\n",
4424 /* There may be an optional second domain arg. */
4426 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4427 s2 = argv[test_retry_arg++];
4429 /* The final arg is an error name */
4431 if (test_retry_arg < argc)
4433 uschar *ss = argv[test_retry_arg];
4435 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4438 printf("%s\n", CS error);
4439 return EXIT_FAILURE;
4442 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4443 code > 100 as an error is for matching codes to the decade. Turn them into
4444 a real error code, off the decade. */
4446 if (basic_errno == ERRNO_MAIL4XX ||
4447 basic_errno == ERRNO_RCPT4XX ||
4448 basic_errno == ERRNO_DATA4XX)
4450 int code = (more_errno >> 8) & 255;
4452 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4453 else if (code > 100)
4454 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4458 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4459 if (yield == NULL) printf("No retry information found\n"); else
4462 more_errno = yield->more_errno;
4463 printf("Retry rule: %s ", yield->pattern);
4465 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4467 printf("quota%s%s ",
4468 (more_errno > 0)? "_" : "",
4469 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4471 else if (yield->basic_errno == ECONNREFUSED)
4473 printf("refused%s%s ",
4474 (more_errno > 0)? "_" : "",
4475 (more_errno == 'M')? "MX" :
4476 (more_errno == 'A')? "A" : "");
4478 else if (yield->basic_errno == ETIMEDOUT)
4481 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4483 if (more_errno != 0) printf("_%s",
4484 (more_errno == 'M')? "MX" : "A");
4487 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4488 printf("auth_failed ");
4491 for (r = yield->rules; r != NULL; r = r->next)
4493 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4494 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4500 printf(",%d.", x/1000);
4514 exim_exit(EXIT_SUCCESS);
4517 /* Handle a request to list one or more configuration options */
4518 /* If -n was set, we suppress some information */
4522 set_process_info("listing variables");
4523 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4524 else for (i = recipients_arg; i < argc; i++)
4527 (Ustrcmp(argv[i], "router") == 0 ||
4528 Ustrcmp(argv[i], "transport") == 0 ||
4529 Ustrcmp(argv[i], "authenticator") == 0 ||
4530 Ustrcmp(argv[i], "macro") == 0))
4532 readconf_print(argv[i+1], argv[i], flag_n);
4535 else readconf_print(argv[i], NULL, flag_n);
4537 exim_exit(EXIT_SUCCESS);
4541 /* Handle a request to deliver one or more messages that are already on the
4542 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4543 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4545 Delivery of specific messages is typically used for a small number when
4546 prodding by hand (when the option forced_delivery will be set) or when
4547 re-execing to regain root privilege. Each message delivery must happen in a
4548 separate process, so we fork a process for each one, and run them sequentially
4549 so that debugging output doesn't get intertwined, and to avoid spawning too
4550 many processes if a long list is given. However, don't fork for the last one;
4551 this saves a process in the common case when Exim is called to deliver just one
4554 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4556 if (prod_requires_admin && !admin_user)
4558 fprintf(stderr, "exim: Permission denied\n");
4559 exim_exit(EXIT_FAILURE);
4561 set_process_info("delivering specified messages");
4562 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4563 for (i = msg_action_arg; i < argc; i++)
4568 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4569 else if ((pid = fork()) == 0)
4571 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4572 _exit(EXIT_SUCCESS);
4576 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4578 exim_exit(EXIT_FAILURE);
4582 exim_exit(EXIT_SUCCESS);
4586 /* If only a single queue run is requested, without SMTP listening, we can just
4587 turn into a queue runner, with an optional starting message id. */
4589 if (queue_interval == 0 && !daemon_listen)
4591 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4592 (start_queue_run_id == NULL)? US"" : US" starting at ",
4593 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4594 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4595 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4596 set_process_info("running the queue (single queue run)");
4597 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4598 exim_exit(EXIT_SUCCESS);
4602 /* Find the login name of the real user running this process. This is always
4603 needed when receiving a message, because it is written into the spool file. It
4604 may also be used to construct a from: or a sender: header, and in this case we
4605 need the user's full name as well, so save a copy of it, checked for RFC822
4606 syntax and munged if necessary, if it hasn't previously been set by the -F
4607 argument. We may try to get the passwd entry more than once, in case NIS or
4608 other delays are in evidence. Save the home directory for use in filter testing
4613 if ((pw = getpwuid(real_uid)) != NULL)
4615 originator_login = string_copy(US pw->pw_name);
4616 originator_home = string_copy(US pw->pw_dir);
4618 /* If user name has not been set by -F, set it from the passwd entry
4619 unless -f has been used to set the sender address by a trusted user. */
4621 if (originator_name == NULL)
4623 if (sender_address == NULL ||
4624 (!trusted_caller && filter_test == FTEST_NONE))
4626 uschar *name = US pw->pw_gecos;
4627 uschar *amp = Ustrchr(name, '&');
4630 /* Most Unix specify that a '&' character in the gecos field is
4631 replaced by a copy of the login name, and some even specify that
4632 the first character should be upper cased, so that's what we do. */
4637 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4638 amp - name, name, &loffset, originator_login, amp + 1);
4639 buffer[loffset] = toupper(buffer[loffset]);
4643 /* If a pattern for matching the gecos field was supplied, apply
4644 it and then expand the name string. */
4646 if (gecos_pattern != NULL && gecos_name != NULL)
4649 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4651 if (regex_match_and_setup(re, name, 0, -1))
4653 uschar *new_name = expand_string(gecos_name);
4655 if (new_name != NULL)
4657 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4658 "gecos field \"%s\"\n", new_name, name);
4661 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4662 "\"%s\": %s\n", gecos_name, expand_string_message);
4664 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4665 "gecos field \"%s\"\n", gecos_pattern, name);
4666 store_free((void *)re);
4668 originator_name = string_copy(name);
4671 /* A trusted caller has used -f but not -F */
4673 else originator_name = US"";
4676 /* Break the retry loop */
4681 if (++i > finduser_retries) break;
4685 /* If we cannot get a user login, log the incident and give up, unless the
4686 configuration specifies something to use. When running in the test harness,
4687 any setting of unknown_login overrides the actual name. */
4689 if (originator_login == NULL || running_in_test_harness)
4691 if (unknown_login != NULL)
4693 originator_login = expand_string(unknown_login);
4694 if (originator_name == NULL && unknown_username != NULL)
4695 originator_name = expand_string(unknown_username);
4696 if (originator_name == NULL) originator_name = US"";
4698 if (originator_login == NULL)
4699 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4703 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4706 originator_name = string_copy(parse_fix_phrase(originator_name,
4707 Ustrlen(originator_name), big_buffer, big_buffer_size));
4709 /* If a message is created by this call of Exim, the uid/gid of its originator
4710 are those of the caller. These values are overridden if an existing message is
4711 read in from the spool. */
4713 originator_uid = real_uid;
4714 originator_gid = real_gid;
4716 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4717 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4719 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4720 returns. We leave this till here so that the originator_ fields are available
4721 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4724 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4728 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4729 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4730 "mua_wrapper is set");
4735 /* If the sender ident has not been set (by a trusted caller) set it to
4736 the caller. This will get overwritten below for an inetd call. If a trusted
4737 caller has set it empty, unset it. */
4739 if (sender_ident == NULL) sender_ident = originator_login;
4740 else if (sender_ident[0] == 0) sender_ident = NULL;
4742 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4743 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4744 originator_* variables set. */
4746 if (test_rewrite_arg >= 0)
4748 really_exim = FALSE;
4749 if (test_rewrite_arg >= argc)
4751 printf("-brw needs an address argument\n");
4752 exim_exit(EXIT_FAILURE);
4754 rewrite_test(argv[test_rewrite_arg]);
4755 exim_exit(EXIT_SUCCESS);
4758 /* A locally-supplied message is considered to be coming from a local user
4759 unless a trusted caller supplies a sender address with -f, or is passing in the
4760 message via SMTP (inetd invocation or otherwise). */
4762 if ((sender_address == NULL && !smtp_input) ||
4763 (!trusted_caller && filter_test == FTEST_NONE))
4765 sender_local = TRUE;
4767 /* A trusted caller can supply authenticated_sender and authenticated_id
4768 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4769 defaults except when host checking. */
4771 if (authenticated_sender == NULL && !host_checking)
4772 authenticated_sender = string_sprintf("%s@%s", originator_login,
4773 qualify_domain_sender);
4774 if (authenticated_id == NULL && !host_checking)
4775 authenticated_id = originator_login;
4778 /* Trusted callers are always permitted to specify the sender address.
4779 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4780 is specified is the empty address. However, if a trusted caller does not
4781 specify a sender address for SMTP input, we leave sender_address unset. This
4782 causes the MAIL commands to be honoured. */
4784 if ((!smtp_input && sender_address == NULL) ||
4785 !receive_check_set_sender(sender_address))
4787 /* Either the caller is not permitted to set a general sender, or this is
4788 non-SMTP input and the trusted caller has not set a sender. If there is no
4789 sender, or if a sender other than <> is set, override with the originator's
4790 login (which will get qualified below), except when checking things. */
4792 if (sender_address == NULL /* No sender_address set */
4794 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4795 !checking && /* Not running tests, AND */
4796 filter_test == FTEST_NONE)) /* Not testing a filter */
4798 sender_address = originator_login;
4799 sender_address_forced = FALSE;
4800 sender_address_domain = 0;
4804 /* Remember whether an untrusted caller set the sender address */
4806 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4808 /* Ensure that the sender address is fully qualified unless it is the empty
4809 address, which indicates an error message, or doesn't exist (root caller, smtp
4810 interface, no -f argument). */
4812 if (sender_address != NULL && sender_address[0] != 0 &&
4813 sender_address_domain == 0)
4814 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4815 qualify_domain_sender);
4817 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4819 /* Handle a request to verify a list of addresses, or test them for delivery.
4820 This must follow the setting of the sender address, since routers can be
4821 predicated upon the sender. If no arguments are given, read addresses from
4822 stdin. Set debug_level to at least D_v to get full output for address testing.
4825 if (verify_address_mode || address_test_mode)
4828 int flags = vopt_qualify;
4830 if (verify_address_mode)
4832 if (!verify_as_sender) flags |= vopt_is_recipient;
4833 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4838 flags |= vopt_is_recipient;
4839 debug_selector |= D_v;
4840 debug_file = stderr;
4841 debug_fd = fileno(debug_file);
4842 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4845 if (recipients_arg < argc)
4847 while (recipients_arg < argc)
4849 uschar *s = argv[recipients_arg++];
4852 BOOL finished = FALSE;
4853 uschar *ss = parse_find_address_end(s, FALSE);
4854 if (*ss == ',') *ss = 0; else finished = TRUE;
4855 test_address(s, flags, &exit_value);
4858 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4865 uschar *s = get_stdinput(NULL, NULL);
4866 if (s == NULL) break;
4867 test_address(s, flags, &exit_value);
4871 exim_exit(exit_value);
4874 /* Handle expansion checking. Either expand items on the command line, or read
4875 from stdin if there aren't any. If -Mset was specified, load the message so
4876 that its variables can be used, but restrict this facility to admin users.
4877 Otherwise, if -bem was used, read a message from stdin. */
4881 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4883 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4886 fprintf(stderr, "exim: permission denied\n");
4889 message_id = argv[msg_action_arg];
4890 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4891 if (!spool_open_datafile(message_id))
4892 printf ("Failed to load message datafile %s\n", message_id);
4893 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4894 printf ("Failed to load message %s\n", message_id);
4897 /* Read a test message from a file. We fudge it up to be on stdin, saving
4898 stdin itself for later reading of expansion strings. */
4900 else if (expansion_test_message != NULL)
4902 int save_stdin = dup(0);
4903 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4906 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4908 return EXIT_FAILURE;
4911 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4912 message_ended = END_NOTENDED;
4913 read_message_body(receive_msg(extract_recipients));
4914 message_linecount += body_linecount;
4915 (void)dup2(save_stdin, 0);
4916 (void)close(save_stdin);
4917 clearerr(stdin); /* Required by Darwin */
4920 /* Allow $recipients for this testing */
4922 enable_dollar_recipients = TRUE;
4924 /* Expand command line items */
4926 if (recipients_arg < argc)
4928 while (recipients_arg < argc)
4930 uschar *s = argv[recipients_arg++];
4931 uschar *ss = expand_string(s);
4932 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4933 else printf("%s\n", CS ss);
4941 char *(*fn_readline)(const char *) = NULL;
4942 void (*fn_addhist)(const char *) = NULL;
4945 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4951 uschar *source = get_stdinput(fn_readline, fn_addhist);
4952 if (source == NULL) break;
4953 ss = expand_string(source);
4955 printf ("Failed: %s\n", expand_string_message);
4956 else printf("%s\n", CS ss);
4960 if (dlhandle != NULL) dlclose(dlhandle);
4964 /* The data file will be open after -Mset */
4966 if (deliver_datafile >= 0)
4968 (void)close(deliver_datafile);
4969 deliver_datafile = -1;
4972 exim_exit(EXIT_SUCCESS);
4976 /* The active host name is normally the primary host name, but it can be varied
4977 for hosts that want to play several parts at once. We need to ensure that it is
4978 set for host checking, and for receiving messages. */
4980 smtp_active_hostname = primary_hostname;
4981 if (raw_active_hostname != NULL)
4983 uschar *nah = expand_string(raw_active_hostname);
4986 if (!expand_string_forcedfail)
4987 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4988 "(smtp_active_hostname): %s", raw_active_hostname,
4989 expand_string_message);
4991 else if (nah[0] != 0) smtp_active_hostname = nah;
4994 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4995 given IP address so that the blocking and relay configuration can be tested.
4996 Unless a sender_ident was set by -oMt, we discard it (the default is the
4997 caller's login name). An RFC 1413 call is made only if we are running in the
4998 test harness and an incoming interface and both ports are specified, because
4999 there is no TCP/IP call to find the ident for. */
5006 if (!sender_ident_set)
5008 sender_ident = NULL;
5009 if (running_in_test_harness && sender_host_port != 0 &&
5010 interface_address != NULL && interface_port != 0)
5011 verify_get_ident(1413);
5014 /* In case the given address is a non-canonical IPv6 address, canonicize
5015 it. The code works for both IPv4 and IPv6, as it happens. */
5017 size = host_aton(sender_host_address, x);
5018 sender_host_address = store_get(48); /* large enough for full IPv6 */
5019 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5021 /* Now set up for testing */
5023 host_build_sender_fullhost();
5027 sender_local = FALSE;
5028 sender_host_notsocket = TRUE;
5029 debug_file = stderr;
5030 debug_fd = fileno(debug_file);
5031 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5032 "**** but without any ident (RFC 1413) callback.\n"
5033 "**** This is not for real!\n\n",
5034 sender_host_address);
5036 if (verify_check_host(&hosts_connection_nolog) == OK)
5037 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5038 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5040 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5041 because a log line has already been written for all its failure exists
5042 (usually "connection refused: <reason>") and writing another one is
5043 unnecessary clutter. */
5045 if (smtp_start_session())
5047 reset_point = store_get(0);
5050 store_reset(reset_point);
5051 if (smtp_setup_msg() <= 0) break;
5052 if (!receive_msg(FALSE)) break;
5056 exim_exit(EXIT_SUCCESS);
5060 /* Arrange for message reception if recipients or SMTP were specified;
5061 otherwise complain unless a version print (-bV) happened or this is a filter
5062 verification test or info dump.
5063 In the former case, show the configuration file name. */
5065 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5067 if (version_printed)
5069 printf("Configuration file is %s\n", config_main_filename);
5070 return EXIT_SUCCESS;
5073 if (info_flag != CMDINFO_NONE)
5075 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5076 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5079 if (filter_test == FTEST_NONE)
5080 exim_usage(called_as);
5084 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5085 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5086 that we are not called from inetd, because that is rejected above. The
5087 following configuration settings are forced here:
5089 (1) Synchronous delivery (-odi)
5090 (2) Errors to stderr (-oep == -oeq)
5091 (3) No parallel remote delivery
5092 (4) Unprivileged delivery
5094 We don't force overall queueing options because there are several of them;
5095 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5096 to override any SMTP queueing. */
5100 synchronous_delivery = TRUE;
5101 arg_error_handling = ERRORS_STDERR;
5102 remote_max_parallel = 1;
5103 deliver_drop_privilege = TRUE;
5105 queue_smtp_domains = NULL;
5106 #ifdef EXPERIMENTAL_INTERNATIONAL
5107 message_utf8_downconvert = -1; /* convert-if-needed */
5112 /* Prepare to accept one or more new messages on the standard input. When a
5113 message has been read, its id is returned in message_id[]. If doing immediate
5114 delivery, we fork a delivery process for each received message, except for the
5115 last one, where we can save a process switch.
5117 It is only in non-smtp mode that error_handling is allowed to be changed from
5118 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5119 sendmail error modes other than -oem ever actually used? Later: yes.) */
5121 if (!smtp_input) error_handling = arg_error_handling;
5123 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5124 logging being sent down the socket and make an identd call to get the
5129 (void)fclose(stderr);
5130 exim_nullstd(); /* Re-open to /dev/null */
5131 verify_get_ident(IDENT_PORT);
5132 host_build_sender_fullhost();
5133 set_process_info("handling incoming connection from %s via inetd",
5137 /* If the sender host address has been set, build sender_fullhost if it hasn't
5138 already been done (which it will have been for inetd). This caters for the
5139 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5140 so that the test for IP options is skipped for -bs input. */
5142 if (sender_host_address != NULL && sender_fullhost == NULL)
5144 host_build_sender_fullhost();
5145 set_process_info("handling incoming connection from %s via -oMa",
5147 sender_host_notsocket = TRUE;
5150 /* Otherwise, set the sender host as unknown except for inetd calls. This
5151 prevents host checking in the case of -bs not from inetd and also for -bS. */
5153 else if (!is_inetd) sender_host_unknown = TRUE;
5155 /* If stdout does not exist, then dup stdin to stdout. This can happen
5156 if exim is started from inetd. In this case fd 0 will be set to the socket,
5157 but fd 1 will not be set. This also happens for passed SMTP channels. */
5159 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5161 /* Set up the incoming protocol name and the state of the program. Root is
5162 allowed to force received protocol via the -oMr option above. If we have come
5163 via inetd, the process info has already been set up. We don't set
5164 received_protocol here for smtp input, as it varies according to
5165 batch/HELO/EHLO/AUTH/TLS. */
5169 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5170 smtp_batched_input? "batched " : "",
5171 (sender_address!= NULL)? sender_address : originator_login);
5175 if (received_protocol == NULL)
5176 received_protocol = string_sprintf("local%s", called_as);
5177 set_process_info("accepting a local non-SMTP message from <%s>",
5181 /* Initialize the session_local_queue-only flag (this will be ignored if
5182 mua_wrapper is set) */
5185 session_local_queue_only = queue_only;
5187 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5188 the spool if so configured. On failure, we must not attempt to send an error
5189 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5190 error code is given.) */
5192 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5194 fprintf(stderr, "exim: insufficient disk space\n");
5195 return EXIT_FAILURE;
5198 /* If this is smtp input of any kind, real or batched, handle the start of the
5201 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5202 because a log line has already been written for all its failure exists
5203 (usually "connection refused: <reason>") and writing another one is
5204 unnecessary clutter. */
5210 if (verify_check_host(&hosts_connection_nolog) == OK)
5211 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5212 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5213 if (!smtp_start_session())
5216 exim_exit(EXIT_SUCCESS);
5220 /* Otherwise, set up the input size limit here. */
5224 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5225 if (expand_string_message != NULL)
5227 if (thismessage_size_limit == -1)
5228 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5229 "message_size_limit: %s", expand_string_message);
5231 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5232 "message_size_limit: %s", expand_string_message);
5236 /* Loop for several messages when reading SMTP input. If we fork any child
5237 processes, we don't want to wait for them unless synchronous delivery is
5238 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5239 same as SIG_DFL, despite the fact that documentation often lists the default as
5240 "ignore". This is a confusing area. This is what I know:
5242 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5243 processes that complete simply to go away without ever becoming defunct. You
5244 can't then wait for them - but we don't want to wait for them in the
5245 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5246 happen for all OS (e.g. *BSD is different).
5248 But that's not the end of the story. Some (many? all?) systems have the
5249 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5250 has by default, so it seems that the difference is merely one of default
5251 (compare restarting vs non-restarting signals).
5253 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5254 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5255 of the loop below. Paranoia rules.
5257 February 2003: That's *still* not the end of the story. There are now versions
5258 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5259 process then calls waitpid(), a grumble is written to the system log, because
5260 this is logically inconsistent. In other words, it doesn't like the paranoia.
5261 As a consequenc of this, the waitpid() below is now excluded if we are sure
5262 that SIG_IGN works. */
5264 if (!synchronous_delivery)
5267 struct sigaction act;
5268 act.sa_handler = SIG_IGN;
5269 sigemptyset(&(act.sa_mask));
5270 act.sa_flags = SA_NOCLDWAIT;
5271 sigaction(SIGCHLD, &act, NULL);
5273 signal(SIGCHLD, SIG_IGN);
5277 /* Save the current store pool point, for resetting at the start of
5278 each message, and save the real sender address, if any. */
5280 reset_point = store_get(0);
5281 real_sender_address = sender_address;
5283 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5284 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5289 store_reset(reset_point);
5292 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5293 input and build the recipients list, before calling receive_msg() to read the
5294 message proper. Whatever sender address is given in the SMTP transaction is
5295 often ignored for local senders - we use the actual sender, which is normally
5296 either the underlying user running this process or a -f argument provided by
5297 a trusted caller. It is saved in real_sender_address. The test for whether to
5298 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5303 if ((rc = smtp_setup_msg()) > 0)
5305 if (real_sender_address != NULL &&
5306 !receive_check_set_sender(sender_address))
5308 sender_address = raw_sender = real_sender_address;
5309 sender_address_unrewritten = NULL;
5312 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5313 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5314 the very end. The result of the ACL is ignored (as for other non-SMTP
5315 messages). It is run for its potential side effects. */
5317 if (smtp_batched_input && acl_not_smtp_start != NULL)
5319 uschar *user_msg, *log_msg;
5320 enable_dollar_recipients = TRUE;
5321 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5322 &user_msg, &log_msg);
5323 enable_dollar_recipients = FALSE;
5326 /* Now get the data for the message */
5328 more = receive_msg(extract_recipients);
5329 if (message_id[0] == 0)
5332 smtp_log_no_mail(); /* Log no mail if configured */
5333 exim_exit(EXIT_FAILURE);
5338 smtp_log_no_mail(); /* Log no mail if configured */
5339 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5343 /* In the non-SMTP case, we have all the information from the command
5344 line, but must process it in case it is in the more general RFC822
5345 format, and in any case, to detect syntax errors. Also, it appears that
5346 the use of comma-separated lists as single arguments is common, so we
5347 had better support them. */
5353 int count = argc - recipients_arg;
5354 uschar **list = argv + recipients_arg;
5356 /* These options cannot be changed dynamically for non-SMTP messages */
5358 active_local_sender_retain = local_sender_retain;
5359 active_local_from_check = local_from_check;
5361 /* Save before any rewriting */
5363 raw_sender = string_copy(sender_address);
5365 /* Loop for each argument */
5367 for (i = 0; i < count; i++)
5369 int start, end, domain;
5371 uschar *s = list[i];
5373 /* Loop for each comma-separated address */
5377 BOOL finished = FALSE;
5379 uschar *ss = parse_find_address_end(s, FALSE);
5381 if (*ss == ',') *ss = 0; else finished = TRUE;
5383 /* Check max recipients - if -t was used, these aren't recipients */
5385 if (recipients_max > 0 && ++rcount > recipients_max &&
5386 !extract_recipients)
5387 if (error_handling == ERRORS_STDERR)
5389 fprintf(stderr, "exim: too many recipients\n");
5390 exim_exit(EXIT_FAILURE);
5395 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5396 errors_sender_rc : EXIT_FAILURE;
5399 #ifdef EXPERIMENTAL_INTERNATIONAL
5401 BOOL b = allow_utf8_domains;
5402 allow_utf8_domains = TRUE;
5405 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5407 #ifdef EXPERIMENTAL_INTERNATIONAL
5408 if (string_is_utf8(recipient))
5409 message_smtputf8 = TRUE;
5411 allow_utf8_domains = b;
5414 if (domain == 0 && !allow_unqualified_recipient)
5417 errmess = US"unqualified recipient address not allowed";
5420 if (recipient == NULL)
5422 if (error_handling == ERRORS_STDERR)
5424 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5425 string_printing(list[i]), errmess);
5426 exim_exit(EXIT_FAILURE);
5432 eblock.text1 = string_printing(list[i]);
5433 eblock.text2 = errmess;
5435 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5436 errors_sender_rc : EXIT_FAILURE;
5440 receive_add_recipient(recipient, -1);
5443 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5447 /* Show the recipients when debugging */
5452 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5453 if (recipients_list != NULL)
5455 debug_printf("Recipients:\n");
5456 for (i = 0; i < recipients_count; i++)
5457 debug_printf(" %s\n", recipients_list[i].address);
5461 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5462 ignored; rejecting here would just add complication, and it can just as
5463 well be done later. Allow $recipients to be visible in the ACL. */
5465 if (acl_not_smtp_start != NULL)
5467 uschar *user_msg, *log_msg;
5468 enable_dollar_recipients = TRUE;
5469 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5470 &user_msg, &log_msg);
5471 enable_dollar_recipients = FALSE;
5474 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5475 will just read the headers for the message, and not write anything onto the
5478 message_ended = END_NOTENDED;
5479 more = receive_msg(extract_recipients);
5481 /* more is always FALSE here (not SMTP message) when reading a message
5482 for real; when reading the headers of a message for filter testing,
5483 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5485 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5486 } /* Non-SMTP message reception */
5488 /* If this is a filter testing run, there are headers in store, but
5489 no message on the spool. Run the filtering code in testing mode, setting
5490 the domain to the qualify domain and the local part to the current user,
5491 unless they have been set by options. The prefix and suffix are left unset
5492 unless specified. The the return path is set to to the sender unless it has
5493 already been set from a return-path header in the message. */
5495 if (filter_test != FTEST_NONE)
5497 deliver_domain = (ftest_domain != NULL)?
5498 ftest_domain : qualify_domain_recipient;
5499 deliver_domain_orig = deliver_domain;
5500 deliver_localpart = (ftest_localpart != NULL)?
5501 ftest_localpart : originator_login;
5502 deliver_localpart_orig = deliver_localpart;
5503 deliver_localpart_prefix = ftest_prefix;
5504 deliver_localpart_suffix = ftest_suffix;
5505 deliver_home = originator_home;
5507 if (return_path == NULL)
5509 printf("Return-path copied from sender\n");
5510 return_path = string_copy(sender_address);
5513 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5514 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5516 receive_add_recipient(
5517 string_sprintf("%s%s%s@%s",
5518 (ftest_prefix == NULL)? US"" : ftest_prefix,
5520 (ftest_suffix == NULL)? US"" : ftest_suffix,
5521 deliver_domain), -1);
5523 printf("Recipient = %s\n", recipients_list[0].address);
5524 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5525 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5527 if (chdir("/")) /* Get away from wherever the user is running this from */
5529 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5530 exim_exit(EXIT_FAILURE);
5533 /* Now we run either a system filter test, or a user filter test, or both.
5534 In the latter case, headers added by the system filter will persist and be
5535 available to the user filter. We need to copy the filter variables
5538 if ((filter_test & FTEST_SYSTEM) != 0)
5540 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5541 exim_exit(EXIT_FAILURE);
5544 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5546 if ((filter_test & FTEST_USER) != 0)
5548 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5549 exim_exit(EXIT_FAILURE);
5552 exim_exit(EXIT_SUCCESS);
5555 /* Else act on the result of message reception. We should not get here unless
5556 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5557 will be TRUE. If it is not, check on the number of messages received in this
5560 if (!session_local_queue_only &&
5561 smtp_accept_queue_per_connection > 0 &&
5562 receive_messagecount > smtp_accept_queue_per_connection)
5564 session_local_queue_only = TRUE;
5565 queue_only_reason = 2;
5568 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5569 and queue_only_load is set, check that the load average is below it. If it is
5570 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5571 default), we put the whole session into queue_only mode. It then remains this
5572 way for any subsequent messages on the same SMTP connection. This is a
5573 deliberate choice; even though the load average may fall, it doesn't seem
5574 right to deliver later messages on the same call when not delivering earlier
5575 ones. However, there are odd cases where this is not wanted, so this can be
5576 changed by setting queue_only_load_latch false. */
5578 local_queue_only = session_local_queue_only;
5579 if (!local_queue_only && queue_only_load >= 0)
5581 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5582 if (local_queue_only)
5584 queue_only_reason = 3;
5585 if (queue_only_load_latch) session_local_queue_only = TRUE;
5589 /* If running as an MUA wrapper, all queueing options and freezing options
5593 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5595 /* Log the queueing here, when it will get a message id attached, but
5596 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5599 if (local_queue_only) switch(queue_only_reason)
5602 log_write(L_delay_delivery,
5603 LOG_MAIN, "no immediate delivery: more than %d messages "
5604 "received in one connection", smtp_accept_queue_per_connection);
5608 log_write(L_delay_delivery,
5609 LOG_MAIN, "no immediate delivery: load average %.2f",
5610 (double)load_average/1000.0);
5614 /* Else do the delivery unless the ACL or local_scan() called for queue only
5615 or froze the message. Always deliver in a separate process. A fork failure is
5616 not a disaster, as the delivery will eventually happen on a subsequent queue
5617 run. The search cache must be tidied before the fork, as the parent will
5618 do it before exiting. The child will trigger a lookup failure and
5619 thereby defer the delivery if it tries to use (for example) a cached ldap
5620 connection that the parent has called unbind on. */
5622 else if (!queue_only_policy && !deliver_freeze)
5627 if ((pid = fork()) == 0)
5630 close_unwanted(); /* Close unwanted file descriptors and TLS */
5631 exim_nullstd(); /* Ensure std{in,out,err} exist */
5633 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5634 mode, deliver_drop_privilege is forced TRUE). */
5636 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5638 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5640 /* Control does not return here. */
5643 /* No need to re-exec */
5645 rc = deliver_message(message_id, FALSE, FALSE);
5647 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5648 EXIT_SUCCESS : EXIT_FAILURE);
5653 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5654 "process: %s", strerror(errno));
5657 /* In the parent, wait if synchronous delivery is required. This will
5658 always be the case in MUA wrapper mode. */
5660 else if (synchronous_delivery)
5663 while (wait(&status) != pid);
5664 if ((status & 0x00ff) != 0)
5665 log_write(0, LOG_MAIN|LOG_PANIC,
5666 "process %d crashed with signal %d while delivering %s",
5667 (int)pid, status & 0x00ff, message_id);
5668 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5672 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5673 automatically reaps children (see comments above the loop), clear away any
5674 finished subprocesses here, in case there are lots of messages coming in
5675 from the same source. */
5677 #ifndef SIG_IGN_WORKS
5678 while (waitpid(-1, NULL, WNOHANG) > 0);
5682 exim_exit(EXIT_SUCCESS); /* Never returns */
5683 return 0; /* To stop compiler warning */