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 {int dummy = write(fd, process_info, process_info_len); dummy = dummy; }
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_PROXY
851 fprintf(f, " Experimental_Proxy");
853 #ifdef EXPERIMENTAL_EVENT
854 fprintf(f, " Experimental_Event");
856 #ifdef EXPERIMENTAL_REDIS
857 fprintf(f, " Experimental_Redis");
859 #ifdef EXPERIMENTAL_SOCKS
860 fprintf(f, " Experimental_SOCKS");
862 #ifdef EXPERIMENTAL_INTERNATIONAL
863 fprintf(f, " Experimental_International");
867 fprintf(f, "Lookups (built-in):");
868 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
869 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
871 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
874 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
875 fprintf(f, " dbm dbmjz dbmnz");
877 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
878 fprintf(f, " dnsdb");
880 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
881 fprintf(f, " dsearch");
883 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
884 fprintf(f, " ibase");
886 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
887 fprintf(f, " ldap ldapdn ldapm");
889 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
890 fprintf(f, " mysql");
892 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
893 fprintf(f, " nis nis0");
895 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
896 fprintf(f, " nisplus");
898 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
899 fprintf(f, " oracle");
901 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
902 fprintf(f, " passwd");
904 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
905 fprintf(f, " pgsql");
907 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
908 fprintf(f, " sqlite");
910 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
911 fprintf(f, " testdb");
913 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
914 fprintf(f, " whoson");
918 fprintf(f, "Authenticators:");
920 fprintf(f, " cram_md5");
922 #ifdef AUTH_CYRUS_SASL
923 fprintf(f, " cyrus_sasl");
926 fprintf(f, " dovecot");
929 fprintf(f, " gsasl");
931 #ifdef AUTH_HEIMDAL_GSSAPI
932 fprintf(f, " heimdal_gssapi");
934 #ifdef AUTH_PLAINTEXT
935 fprintf(f, " plaintext");
945 fprintf(f, "Routers:");
947 fprintf(f, " accept");
949 #ifdef ROUTER_DNSLOOKUP
950 fprintf(f, " dnslookup");
952 #ifdef ROUTER_IPLITERAL
953 fprintf(f, " ipliteral");
955 #ifdef ROUTER_IPLOOKUP
956 fprintf(f, " iplookup");
958 #ifdef ROUTER_MANUALROUTE
959 fprintf(f, " manualroute");
961 #ifdef ROUTER_QUERYPROGRAM
962 fprintf(f, " queryprogram");
964 #ifdef ROUTER_REDIRECT
965 fprintf(f, " redirect");
969 fprintf(f, "Transports:");
970 #ifdef TRANSPORT_APPENDFILE
971 fprintf(f, " appendfile");
972 #ifdef SUPPORT_MAILDIR
973 fprintf(f, "/maildir");
975 #ifdef SUPPORT_MAILSTORE
976 fprintf(f, "/mailstore");
982 #ifdef TRANSPORT_AUTOREPLY
983 fprintf(f, " autoreply");
985 #ifdef TRANSPORT_LMTP
988 #ifdef TRANSPORT_PIPE
991 #ifdef TRANSPORT_SMTP
996 if (fixed_never_users[0] > 0)
999 fprintf(f, "Fixed never_users: ");
1000 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1001 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1002 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1005 fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1007 /* Everything else is details which are only worth reporting when debugging.
1008 Perhaps the tls_version_report should move into this too. */
1013 /* clang defines __GNUC__ (at least, for me) so test for it first */
1014 #if defined(__clang__)
1015 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1016 #elif defined(__GNUC__)
1017 fprintf(f, "Compiler: GCC [%s]\n",
1021 "? unknown version ?"
1025 fprintf(f, "Compiler: <unknown>\n");
1029 tls_version_report(f);
1031 #ifdef EXPERIMENTAL_INTERNATIONAL
1032 utf8_version_report(f);
1035 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1036 if (authi->version_report)
1037 (*authi->version_report)(f);
1039 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1040 characters; unless it's an ancient version of PCRE in which case it
1042 #ifndef PCRE_PRERELEASE
1043 #define PCRE_PRERELEASE
1046 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1047 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1049 PCRE_MAJOR, PCRE_MINOR,
1050 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1053 #undef EXPAND_AND_QUOTE
1056 for (i = 0; i < lookup_list_count; i++)
1057 if (lookup_list[i]->version_report)
1058 lookup_list[i]->version_report(f);
1060 #ifdef WHITELIST_D_MACROS
1061 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1063 fprintf(f, "WHITELIST_D_MACROS unset\n");
1065 #ifdef TRUSTED_CONFIG_LIST
1066 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1068 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1075 /*************************************************
1076 * Show auxiliary information about Exim *
1077 *************************************************/
1080 show_exim_information(enum commandline_info request, FILE *stream)
1087 fprintf(stream, "Oops, something went wrong.\n");
1091 "The -bI: flag takes a string indicating which information to provide.\n"
1092 "If the string is not recognised, you'll get this help (on stderr).\n"
1094 " exim -bI:help this information\n"
1095 " exim -bI:dscp dscp value keywords known\n"
1096 " exim -bI:sieve list of supported sieve extensions, one per line.\n"
1100 for (pp = exim_sieve_extension_list; *pp; ++pp)
1101 fprintf(stream, "%s\n", *pp);
1104 dscp_list_to_stream(stream);
1110 /*************************************************
1111 * Quote a local part *
1112 *************************************************/
1114 /* This function is used when a sender address or a From: or Sender: header
1115 line is being created from the caller's login, or from an authenticated_id. It
1116 applies appropriate quoting rules for a local part.
1118 Argument: the local part
1119 Returns: the local part, quoted if necessary
1123 local_part_quote(uschar *lpart)
1125 BOOL needs_quote = FALSE;
1130 for (t = lpart; !needs_quote && *t != 0; t++)
1132 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1133 (*t != '.' || t == lpart || t[1] == 0);
1136 if (!needs_quote) return lpart;
1139 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1143 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1146 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1149 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1150 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1151 yield = string_cat(yield, &size, &ptr, nq, 1);
1155 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1163 /*************************************************
1164 * Load readline() functions *
1165 *************************************************/
1167 /* This function is called from testing executions that read data from stdin,
1168 but only when running as the calling user. Currently, only -be does this. The
1169 function loads the readline() function library and passes back the functions.
1170 On some systems, it needs the curses library, so load that too, but try without
1171 it if loading fails. All this functionality has to be requested at build time.
1174 fn_readline_ptr pointer to where to put the readline pointer
1175 fn_addhist_ptr pointer to where to put the addhistory function
1177 Returns: the dlopen handle or NULL on failure
1181 set_readline(char * (**fn_readline_ptr)(const char *),
1182 void (**fn_addhist_ptr)(const char *))
1185 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1187 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1188 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1190 if (dlhandle != NULL)
1192 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1193 * char * readline (const char *prompt);
1194 * void add_history (const char *string);
1196 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1197 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1201 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1210 /*************************************************
1211 * Get a line from stdin for testing things *
1212 *************************************************/
1214 /* This function is called when running tests that can take a number of lines
1215 of input (for example, -be and -bt). It handles continuations and trailing
1216 spaces. And prompting and a blank line output on eof. If readline() is in use,
1217 the arguments are non-NULL and provide the relevant functions.
1220 fn_readline readline function or NULL
1221 fn_addhist addhist function or NULL
1223 Returns: pointer to dynamic memory, or NULL at end of file
1227 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1232 uschar *yield = NULL;
1234 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1238 uschar buffer[1024];
1242 char *readline_line = NULL;
1243 if (fn_readline != NULL)
1245 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1246 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1247 p = US readline_line;
1252 /* readline() not in use */
1255 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1259 /* Handle the line */
1261 ss = p + (int)Ustrlen(p);
1262 while (ss > p && isspace(ss[-1])) ss--;
1266 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1269 yield = string_cat(yield, &size, &ptr, p, ss - p);
1272 if (fn_readline != NULL) free(readline_line);
1275 if (ss == p || yield[ptr-1] != '\\')
1283 if (yield == NULL) printf("\n");
1289 /*************************************************
1290 * Output usage information for the program *
1291 *************************************************/
1293 /* This function is called when there are no recipients
1294 or a specific --help argument was added.
1297 progname information on what name we were called by
1299 Returns: DOES NOT RETURN
1303 exim_usage(uschar *progname)
1306 /* Handle specific program invocation varients */
1307 if (Ustrcmp(progname, US"-mailq") == 0)
1310 "mailq - list the contents of the mail queue\n\n"
1311 "For a list of options, see the Exim documentation.\n");
1315 /* Generic usage - we output this whatever happens */
1317 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1318 "not directly from a shell command line. Options and/or arguments control\n"
1319 "what it does when called. For a list of options, see the Exim documentation.\n");
1326 /*************************************************
1327 * Validate that the macros given are okay *
1328 *************************************************/
1330 /* Typically, Exim will drop privileges if macros are supplied. In some
1331 cases, we want to not do so.
1333 Arguments: none (macros is a global)
1334 Returns: true if trusted, false otherwise
1338 macros_trusted(void)
1340 #ifdef WHITELIST_D_MACROS
1342 uschar *whitelisted, *end, *p, **whites, **w;
1343 int white_count, i, n;
1345 BOOL prev_char_item, found;
1350 #ifndef WHITELIST_D_MACROS
1354 /* We only trust -D overrides for some invoking users:
1355 root, the exim run-time user, the optional config owner user.
1356 I don't know why config-owner would be needed, but since they can own the
1357 config files anyway, there's no security risk to letting them override -D. */
1358 if ( ! ((real_uid == root_uid)
1359 || (real_uid == exim_uid)
1360 #ifdef CONFIGURE_OWNER
1361 || (real_uid == config_uid)
1365 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1369 /* Get a list of macros which are whitelisted */
1370 whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1371 prev_char_item = FALSE;
1373 for (p = whitelisted; *p != '\0'; ++p)
1375 if (*p == ':' || isspace(*p))
1380 prev_char_item = FALSE;
1383 if (!prev_char_item)
1384 prev_char_item = TRUE;
1391 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1392 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1397 if (i == white_count)
1399 while (*p != '\0' && p < end)
1405 /* The list of macros should be very short. Accept the N*M complexity. */
1406 for (m = macros; m != NULL; m = m->next)
1409 for (w = whites; *w; ++w)
1410 if (Ustrcmp(*w, m->name) == 0)
1417 if (m->replacement == NULL)
1419 len = Ustrlen(m->replacement);
1422 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1423 0, PCRE_EOPT, NULL, 0);
1426 if (n != PCRE_ERROR_NOMATCH)
1427 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1431 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1437 /*************************************************
1438 * Entry point and high-level code *
1439 *************************************************/
1441 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1442 the appropriate action. All the necessary functions are present in the one
1443 binary. I originally thought one should split it up, but it turns out that so
1444 much of the apparatus is needed in each chunk that one might as well just have
1445 it all available all the time, which then makes the coding easier as well.
1448 argc count of entries in argv
1449 argv argument strings, with argv[0] being the program name
1451 Returns: EXIT_SUCCESS if terminated successfully
1452 EXIT_FAILURE otherwise, except when a message has been sent
1453 to the sender, and -oee was given
1457 main(int argc, char **cargv)
1459 uschar **argv = USS cargv;
1460 int arg_receive_timeout = -1;
1461 int arg_smtp_receive_timeout = -1;
1462 int arg_error_handling = error_handling;
1463 int filter_sfd = -1;
1464 int filter_ufd = -1;
1467 int list_queue_option = 0;
1469 int msg_action_arg = -1;
1470 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1471 int queue_only_reason = 0;
1473 int perl_start_option = 0;
1475 int recipients_arg = argc;
1476 int sender_address_domain = 0;
1477 int test_retry_arg = -1;
1478 int test_rewrite_arg = -1;
1479 BOOL arg_queue_only = FALSE;
1480 BOOL bi_option = FALSE;
1481 BOOL checking = FALSE;
1482 BOOL count_queue = FALSE;
1483 BOOL expansion_test = FALSE;
1484 BOOL extract_recipients = FALSE;
1485 BOOL flag_G = FALSE;
1486 BOOL flag_n = FALSE;
1487 BOOL forced_delivery = FALSE;
1488 BOOL f_end_dot = FALSE;
1489 BOOL deliver_give_up = FALSE;
1490 BOOL list_queue = FALSE;
1491 BOOL list_options = FALSE;
1492 BOOL local_queue_only;
1494 BOOL one_msg_action = FALSE;
1495 BOOL queue_only_set = FALSE;
1496 BOOL receiving_message = TRUE;
1497 BOOL sender_ident_set = FALSE;
1498 BOOL session_local_queue_only;
1500 BOOL removed_privilege = FALSE;
1501 BOOL usage_wanted = FALSE;
1502 BOOL verify_address_mode = FALSE;
1503 BOOL verify_as_sender = FALSE;
1504 BOOL version_printed = FALSE;
1505 uschar *alias_arg = NULL;
1506 uschar *called_as = US"";
1507 uschar *cmdline_syslog_name = NULL;
1508 uschar *start_queue_run_id = NULL;
1509 uschar *stop_queue_run_id = NULL;
1510 uschar *expansion_test_message = NULL;
1511 uschar *ftest_domain = NULL;
1512 uschar *ftest_localpart = NULL;
1513 uschar *ftest_prefix = NULL;
1514 uschar *ftest_suffix = NULL;
1515 uschar *log_oneline = NULL;
1516 uschar *malware_test_file = NULL;
1517 uschar *real_sender_address;
1518 uschar *originator_home = US"/";
1523 struct stat statbuf;
1524 pid_t passed_qr_pid = (pid_t)0;
1525 int passed_qr_pipe = -1;
1526 gid_t group_list[NGROUPS_MAX];
1528 /* For the -bI: flag */
1529 enum commandline_info info_flag = CMDINFO_NONE;
1530 BOOL info_stdout = FALSE;
1532 /* Possible options for -R and -S */
1534 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1536 /* Need to define this in case we need to change the environment in order
1537 to get rid of a bogus time zone. We have to make it char rather than uschar
1538 because some OS define it in /usr/include/unistd.h. */
1540 extern char **environ;
1542 /* If the Exim user and/or group and/or the configuration file owner/group were
1543 defined by ref:name at build time, we must now find the actual uid/gid values.
1544 This is a feature to make the lives of binary distributors easier. */
1546 #ifdef EXIM_USERNAME
1547 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1551 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1555 /* If ref:name uses a number as the name, route_finduser() returns
1556 TRUE with exim_uid set and pw coerced to NULL. */
1558 exim_gid = pw->pw_gid;
1559 #ifndef EXIM_GROUPNAME
1563 "exim: ref:name should specify a usercode, not a group.\n"
1564 "exim: can't let you get away with it unless you also specify a group.\n");
1571 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1577 #ifdef EXIM_GROUPNAME
1578 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1580 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1586 #ifdef CONFIGURE_OWNERNAME
1587 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1589 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1590 CONFIGURE_OWNERNAME);
1595 /* We default the system_filter_user to be the Exim run-time user, as a
1596 sane non-root value. */
1597 system_filter_uid = exim_uid;
1599 #ifdef CONFIGURE_GROUPNAME
1600 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1602 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1603 CONFIGURE_GROUPNAME);
1608 /* In the Cygwin environment, some initialization needs doing. It is fudged
1609 in by means of this macro. */
1615 /* Check a field which is patched when we are running Exim within its
1616 testing harness; do a fast initial check, and then the whole thing. */
1618 running_in_test_harness =
1619 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1621 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1622 at the start of a program; however, it seems that some environments do not
1623 follow this. A "strange" locale can affect the formatting of timestamps, so we
1626 setlocale(LC_ALL, "C");
1628 /* Set up the default handler for timing using alarm(). */
1630 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1632 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1633 because store_malloc writes a log entry on failure. */
1635 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1636 if (log_buffer == NULL)
1638 fprintf(stderr, "exim: failed to get store for log buffer\n");
1642 /* Initialize the default log options. */
1644 bits_set(log_selector, log_selector_size, log_default);
1646 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1647 NULL when the daemon is run and the file is closed. We have to use this
1648 indirection, because some systems don't allow writing to the variable "stderr".
1651 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1653 /* Arrange for the PCRE regex library to use our store functions. Note that
1654 the normal calls are actually macros that add additional arguments for
1655 debugging purposes so we have to assign specially constructed functions here.
1656 The default is to use store in the stacking pool, but this is overridden in the
1657 regex_must_compile() function. */
1659 pcre_malloc = function_store_get;
1660 pcre_free = function_dummy_free;
1662 /* Ensure there is a big buffer for temporary use in several places. It is put
1663 in malloc store so that it can be freed for enlargement if necessary. */
1665 big_buffer = store_malloc(big_buffer_size);
1667 /* Set up the handler for the data request signal, and set the initial
1668 descriptive text. */
1670 set_process_info("initializing");
1671 os_restarting_signal(SIGUSR1, usr1_handler);
1673 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1674 in the daemon code. For the rest of Exim's uses, we ignore it. */
1676 signal(SIGHUP, SIG_IGN);
1678 /* We don't want to die on pipe errors as the code is written to handle
1679 the write error instead. */
1681 signal(SIGPIPE, SIG_IGN);
1683 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1684 set to SIG_IGN. This causes subprocesses that complete before the parent
1685 process waits for them not to hang around, so when Exim calls wait(), nothing
1686 is there. The wait() code has been made robust against this, but let's ensure
1687 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1688 ending status. We use sigaction rather than plain signal() on those OS where
1689 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1690 problem on AIX with this.) */
1694 struct sigaction act;
1695 act.sa_handler = SIG_DFL;
1696 sigemptyset(&(act.sa_mask));
1698 sigaction(SIGCHLD, &act, NULL);
1701 signal(SIGCHLD, SIG_DFL);
1704 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1709 /* Set up the version number. Set up the leading 'E' for the external form of
1710 message ids, set the pointer to the internal form, and initialize it to
1711 indicate no message being processed. */
1714 message_id_option[0] = '-';
1715 message_id_external = message_id_option + 1;
1716 message_id_external[0] = 'E';
1717 message_id = message_id_external + 1;
1720 /* Set the umask to zero so that any files Exim creates using open() are
1721 created with the modes that it specifies. NOTE: Files created with fopen() have
1722 a problem, which was not recognized till rather late (February 2006). With this
1723 umask, such files will be world writeable. (They are all content scanning files
1724 in the spool directory, which isn't world-accessible, so this is not a
1725 disaster, but it's untidy.) I don't want to change this overall setting,
1726 however, because it will interact badly with the open() calls. Instead, there's
1727 now a function called modefopen() that fiddles with the umask while calling
1732 /* Precompile the regular expression for matching a message id. Keep this in
1733 step with the code that generates ids in the accept.c module. We need to do
1734 this here, because the -M options check their arguments for syntactic validity
1735 using mac_ismsgid, which uses this. */
1738 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1740 /* Precompile the regular expression that is used for matching an SMTP error
1741 code, possibly extended, at the start of an error message. Note that the
1742 terminating whitespace character is included. */
1745 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1748 #ifdef WHITELIST_D_MACROS
1749 /* Precompile the regular expression used to filter the content of macros
1750 given to -D for permissibility. */
1752 regex_whitelisted_macro =
1753 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1756 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1759 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1760 this seems to be a generally accepted convention, since one finds symbolic
1761 links called "mailq" in standard OS configurations. */
1763 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1764 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1767 receiving_message = FALSE;
1768 called_as = US"-mailq";
1771 /* If the program is called as "rmail" treat it as equivalent to
1772 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1773 i.e. preventing a single dot on a line from terminating the message, and
1774 returning with zero return code, even in cases of error (provided an error
1775 message has been sent). */
1777 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1778 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1781 called_as = US"-rmail";
1782 errors_sender_rc = EXIT_SUCCESS;
1785 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1786 this is a smail convention. */
1788 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1789 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1791 smtp_input = smtp_batched_input = TRUE;
1792 called_as = US"-rsmtp";
1795 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1796 this is a smail convention. */
1798 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1799 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1802 receiving_message = FALSE;
1803 called_as = US"-runq";
1806 /* If the program is called as "newaliases" treat it as equivalent to
1807 "exim -bi"; this is a sendmail convention. */
1809 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1810 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1813 receiving_message = FALSE;
1814 called_as = US"-newaliases";
1817 /* Save the original effective uid for a couple of uses later. It should
1818 normally be root, but in some esoteric environments it may not be. */
1820 original_euid = geteuid();
1822 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1823 to be the same as the real ones. This makes a difference only if Exim is setuid
1824 (or setgid) to something other than root, which could be the case in some
1825 special configurations. */
1827 real_uid = getuid();
1828 real_gid = getgid();
1830 if (real_uid == root_uid)
1832 rv = setgid(real_gid);
1835 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1836 (long int)real_gid, strerror(errno));
1839 rv = setuid(real_uid);
1842 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1843 (long int)real_uid, strerror(errno));
1848 /* If neither the original real uid nor the original euid was root, Exim is
1849 running in an unprivileged state. */
1851 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1853 /* Scan the program's arguments. Some can be dealt with right away; others are
1854 simply recorded for checking and handling afterwards. Do a high-level switch
1855 on the second character (the one after '-'), to save some effort. */
1857 for (i = 1; i < argc; i++)
1859 BOOL badarg = FALSE;
1860 uschar *arg = argv[i];
1864 /* An argument not starting with '-' is the start of a recipients list;
1865 break out of the options-scanning loop. */
1873 /* An option consistion of -- terminates the options */
1875 if (Ustrcmp(arg, "--") == 0)
1877 recipients_arg = i + 1;
1881 /* Handle flagged options */
1883 switchchar = arg[1];
1886 /* Make all -ex options synonymous with -oex arguments, since that
1887 is assumed by various callers. Also make -qR options synonymous with -R
1888 options, as that seems to be required as well. Allow for -qqR too, and
1889 the same for -S options. */
1891 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1892 Ustrncmp(arg+1, "qR", 2) == 0 ||
1893 Ustrncmp(arg+1, "qS", 2) == 0)
1895 switchchar = arg[2];
1898 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1900 switchchar = arg[3];
1902 queue_2stage = TRUE;
1905 /* Make -r synonymous with -f, since it is a documented alias */
1907 else if (arg[1] == 'r') switchchar = 'f';
1909 /* Make -ov synonymous with -v */
1911 else if (Ustrcmp(arg, "-ov") == 0)
1917 /* deal with --option_aliases */
1918 else if (switchchar == '-')
1920 if (Ustrcmp(argrest, "help") == 0)
1922 usage_wanted = TRUE;
1925 else if (Ustrcmp(argrest, "version") == 0)
1932 /* High-level switch on active initial letter */
1937 /* sendmail uses -Ac and -Am to control which .cf file is used;
1940 if (*argrest == '\0') { badarg = TRUE; break; }
1943 BOOL ignore = FALSE;
1948 if (*(argrest + 1) == '\0')
1952 if (!ignore) { badarg = TRUE; break; }
1956 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1957 so has no need of it. */
1960 if (*argrest == 0) i++; /* Skip over the type */
1965 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1967 /* -bd: Run in daemon mode, awaiting SMTP connections.
1968 -bdf: Ditto, but in the foreground.
1971 if (*argrest == 'd')
1973 daemon_listen = TRUE;
1974 if (*(++argrest) == 'f') background_daemon = FALSE;
1975 else if (*argrest != 0) { badarg = TRUE; break; }
1978 /* -be: Run in expansion test mode
1979 -bem: Ditto, but read a message from a file first
1982 else if (*argrest == 'e')
1984 expansion_test = checking = TRUE;
1985 if (argrest[1] == 'm')
1987 if (++i >= argc) { badarg = TRUE; break; }
1988 expansion_test_message = argv[i];
1991 if (argrest[1] != 0) { badarg = TRUE; break; }
1994 /* -bF: Run system filter test */
1996 else if (*argrest == 'F')
1998 filter_test |= FTEST_SYSTEM;
1999 if (*(++argrest) != 0) { badarg = TRUE; break; }
2000 if (++i < argc) filter_test_sfile = argv[i]; else
2002 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2007 /* -bf: Run user filter test
2008 -bfd: Set domain for filter testing
2009 -bfl: Set local part for filter testing
2010 -bfp: Set prefix for filter testing
2011 -bfs: Set suffix for filter testing
2014 else if (*argrest == 'f')
2016 if (*(++argrest) == 0)
2018 filter_test |= FTEST_USER;
2019 if (++i < argc) filter_test_ufile = argv[i]; else
2021 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2029 fprintf(stderr, "exim: string expected after %s\n", arg);
2032 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2033 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2034 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2035 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2036 else { badarg = TRUE; break; }
2040 /* -bh: Host checking - an IP address must follow. */
2042 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2044 if (++i >= argc) { badarg = TRUE; break; }
2045 sender_host_address = argv[i];
2046 host_checking = checking = log_testing_mode = TRUE;
2047 host_checking_callout = argrest[1] == 'c';
2050 /* -bi: This option is used by sendmail to initialize *the* alias file,
2051 though it has the -oA option to specify a different file. Exim has no
2052 concept of *the* alias file, but since Sun's YP make script calls
2053 sendmail this way, some support must be provided. */
2055 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2057 /* -bI: provide information, of the type to follow after a colon.
2058 This is an Exim flag. */
2060 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2062 uschar *p = &argrest[2];
2063 info_flag = CMDINFO_HELP;
2066 if (strcmpic(p, CUS"sieve") == 0)
2068 info_flag = CMDINFO_SIEVE;
2071 else if (strcmpic(p, CUS"dscp") == 0)
2073 info_flag = CMDINFO_DSCP;
2076 else if (strcmpic(p, CUS"help") == 0)
2083 /* -bm: Accept and deliver message - the default option. Reinstate
2084 receiving_message, which got turned off for all -b options. */
2086 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2088 /* -bmalware: test the filename given for malware */
2090 else if (Ustrcmp(argrest, "malware") == 0)
2092 if (++i >= argc) { badarg = TRUE; break; }
2093 malware_test_file = argv[i];
2096 /* -bnq: For locally originating messages, do not qualify unqualified
2097 addresses. In the envelope, this causes errors; in header lines they
2100 else if (Ustrcmp(argrest, "nq") == 0)
2102 allow_unqualified_sender = FALSE;
2103 allow_unqualified_recipient = FALSE;
2106 /* -bpxx: List the contents of the mail queue, in various forms. If
2107 the option is -bpc, just a queue count is needed. Otherwise, if the
2108 first letter after p is r, then order is random. */
2110 else if (*argrest == 'p')
2112 if (*(++argrest) == 'c')
2115 if (*(++argrest) != 0) badarg = TRUE;
2119 if (*argrest == 'r')
2121 list_queue_option = 8;
2124 else list_queue_option = 0;
2128 /* -bp: List the contents of the mail queue, top-level only */
2130 if (*argrest == 0) {}
2132 /* -bpu: List the contents of the mail queue, top-level undelivered */
2134 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2136 /* -bpa: List the contents of the mail queue, including all delivered */
2138 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2140 /* Unknown after -bp[r] */
2150 /* -bP: List the configuration variables given as the address list.
2151 Force -v, so configuration errors get displayed. */
2153 else if (Ustrcmp(argrest, "P") == 0)
2155 list_options = TRUE;
2156 debug_selector |= D_v;
2157 debug_file = stderr;
2160 /* -brt: Test retry configuration lookup */
2162 else if (Ustrcmp(argrest, "rt") == 0)
2164 test_retry_arg = i + 1;
2168 /* -brw: Test rewrite configuration */
2170 else if (Ustrcmp(argrest, "rw") == 0)
2172 test_rewrite_arg = i + 1;
2176 /* -bS: Read SMTP commands on standard input, but produce no replies -
2177 all errors are reported by sending messages. */
2179 else if (Ustrcmp(argrest, "S") == 0)
2180 smtp_input = smtp_batched_input = receiving_message = TRUE;
2182 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2183 on standard output. */
2185 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2187 /* -bt: address testing mode */
2189 else if (Ustrcmp(argrest, "t") == 0)
2190 address_test_mode = checking = log_testing_mode = TRUE;
2192 /* -bv: verify addresses */
2194 else if (Ustrcmp(argrest, "v") == 0)
2195 verify_address_mode = checking = log_testing_mode = TRUE;
2197 /* -bvs: verify sender addresses */
2199 else if (Ustrcmp(argrest, "vs") == 0)
2201 verify_address_mode = checking = log_testing_mode = TRUE;
2202 verify_as_sender = TRUE;
2205 /* -bV: Print version string and support details */
2207 else if (Ustrcmp(argrest, "V") == 0)
2209 printf("Exim version %s #%s built %s\n", version_string,
2210 version_cnumber, version_date);
2211 printf("%s\n", CS version_copyright);
2212 version_printed = TRUE;
2213 show_whats_supported(stdout);
2216 /* -bw: inetd wait mode, accept a listening socket as stdin */
2218 else if (*argrest == 'w')
2220 inetd_wait_mode = TRUE;
2221 background_daemon = FALSE;
2222 daemon_listen = TRUE;
2223 if (*(++argrest) != '\0')
2225 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2226 if (inetd_wait_timeout <= 0)
2228 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2238 /* -C: change configuration file list; ignore if it isn't really
2239 a change! Enforce a prefix check if required. */
2244 if(++i < argc) argrest = argv[i]; else
2245 { badarg = TRUE; break; }
2247 if (Ustrcmp(config_main_filelist, argrest) != 0)
2249 #ifdef ALT_CONFIG_PREFIX
2251 int len = Ustrlen(ALT_CONFIG_PREFIX);
2252 uschar *list = argrest;
2254 while((filename = string_nextinlist(&list, &sep, big_buffer,
2255 big_buffer_size)) != NULL)
2257 if ((Ustrlen(filename) < len ||
2258 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2259 Ustrstr(filename, "/../") != NULL) &&
2260 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2262 fprintf(stderr, "-C Permission denied\n");
2267 if (real_uid != root_uid)
2269 #ifdef TRUSTED_CONFIG_LIST
2271 if (real_uid != exim_uid
2272 #ifdef CONFIGURE_OWNER
2273 && real_uid != config_uid
2276 trusted_config = FALSE;
2279 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2282 struct stat statbuf;
2284 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2285 (statbuf.st_uid != root_uid /* owner not root */
2286 #ifdef CONFIGURE_OWNER
2287 && statbuf.st_uid != config_uid /* owner not the special one */
2290 (statbuf.st_gid != root_gid /* group not root */
2291 #ifdef CONFIGURE_GROUP
2292 && statbuf.st_gid != config_gid /* group not the special one */
2294 && (statbuf.st_mode & 020) != 0 /* group writeable */
2296 (statbuf.st_mode & 2) != 0) /* world writeable */
2298 trusted_config = FALSE;
2303 /* Well, the trust list at least is up to scratch... */
2304 void *reset_point = store_get(0);
2305 uschar *trusted_configs[32];
2309 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2311 uschar *start = big_buffer, *nl;
2312 while (*start && isspace(*start))
2316 nl = Ustrchr(start, '\n');
2319 trusted_configs[nr_configs++] = string_copy(start);
2320 if (nr_configs == 32)
2328 const uschar *list = argrest;
2330 while (trusted_config && (filename = string_nextinlist(&list,
2331 &sep, big_buffer, big_buffer_size)) != NULL)
2333 for (i=0; i < nr_configs; i++)
2335 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2338 if (i == nr_configs)
2340 trusted_config = FALSE;
2344 store_reset(reset_point);
2348 /* No valid prefixes found in trust_list file. */
2349 trusted_config = FALSE;
2355 /* Could not open trust_list file. */
2356 trusted_config = FALSE;
2360 /* Not root; don't trust config */
2361 trusted_config = FALSE;
2365 config_main_filelist = argrest;
2366 config_changed = TRUE;
2371 /* -D: set up a macro definition */
2374 #ifdef DISABLE_D_OPTION
2375 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2380 macro_item *mlast = NULL;
2383 uschar *s = argrest;
2385 while (isspace(*s)) s++;
2387 if (*s < 'A' || *s > 'Z')
2389 fprintf(stderr, "exim: macro name set by -D must start with "
2390 "an upper case letter\n");
2394 while (isalnum(*s) || *s == '_')
2396 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2400 if (ptr == 0) { badarg = TRUE; break; }
2401 while (isspace(*s)) s++;
2404 if (*s++ != '=') { badarg = TRUE; break; }
2405 while (isspace(*s)) s++;
2408 for (m = macros; m != NULL; m = m->next)
2410 if (Ustrcmp(m->name, name) == 0)
2412 fprintf(stderr, "exim: duplicated -D in command line\n");
2418 m = store_get(sizeof(macro_item) + Ustrlen(name));
2420 m->command_line = TRUE;
2421 if (mlast == NULL) macros = m; else mlast->next = m;
2422 Ustrcpy(m->name, name);
2423 m->replacement = string_copy(s);
2425 if (clmacro_count >= MAX_CLMACROS)
2427 fprintf(stderr, "exim: too many -D options on command line\n");
2430 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2436 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2437 The latter is now a no-op, retained for compatibility only. If -dd is used,
2438 debugging subprocesses of the daemon is disabled. */
2441 if (Ustrcmp(argrest, "ropcr") == 0)
2443 /* drop_cr = TRUE; */
2446 /* Use an intermediate variable so that we don't set debugging while
2447 decoding the debugging bits. */
2451 unsigned int selector = D_default;
2454 if (*argrest == 'd')
2456 debug_daemon = TRUE;
2460 decode_bits(&selector, 1, debug_notall, argrest,
2461 debug_options, debug_options_count, US"debug", 0);
2462 debug_selector = selector;
2467 /* -E: This is a local error message. This option is not intended for
2468 external use at all, but is not restricted to trusted callers because it
2469 does no harm (just suppresses certain error messages) and if Exim is run
2470 not setuid root it won't always be trusted when it generates error
2471 messages using this option. If there is a message id following -E, point
2472 message_reference at it, for logging. */
2475 local_error_message = TRUE;
2476 if (mac_ismsgid(argrest)) message_reference = argrest;
2480 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2481 option, so it looks as if historically the -oex options are also callable
2482 without the leading -o. So we have to accept them. Before the switch,
2483 anything starting -oe has been converted to -e. Exim does not support all
2484 of the sendmail error options. */
2487 if (Ustrcmp(argrest, "e") == 0)
2489 arg_error_handling = ERRORS_SENDER;
2490 errors_sender_rc = EXIT_SUCCESS;
2492 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2493 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2494 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2495 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2500 /* -F: Set sender's full name, used instead of the gecos entry from
2501 the password file. Since users can usually alter their gecos entries,
2502 there's no security involved in using this instead. The data can follow
2503 the -F or be in the next argument. */
2508 if(++i < argc) argrest = argv[i]; else
2509 { badarg = TRUE; break; }
2511 originator_name = argrest;
2512 sender_name_forced = TRUE;
2516 /* -f: Set sender's address - this value is only actually used if Exim is
2517 run by a trusted user, or if untrusted_set_sender is set and matches the
2518 address, except that the null address can always be set by any user. The
2519 test for this happens later, when the value given here is ignored when not
2520 permitted. For an untrusted user, the actual sender is still put in Sender:
2521 if it doesn't match the From: header (unless no_local_from_check is set).
2522 The data can follow the -f or be in the next argument. The -r switch is an
2523 obsolete form of -f but since there appear to be programs out there that
2524 use anything that sendmail has ever supported, better accept it - the
2525 synonymizing is done before the switch above.
2527 At this stage, we must allow domain literal addresses, because we don't
2528 know what the setting of allow_domain_literals is yet. Ditto for trailing
2529 dots and strip_trailing_dot. */
2533 int dummy_start, dummy_end;
2537 if (i+1 < argc) argrest = argv[++i]; else
2538 { badarg = TRUE; break; }
2541 sender_address = string_sprintf(""); /* Ensure writeable memory */
2544 uschar *temp = argrest + Ustrlen(argrest) - 1;
2545 while (temp >= argrest && isspace(*temp)) temp--;
2546 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2547 allow_domain_literals = TRUE;
2548 strip_trailing_dot = TRUE;
2549 #ifdef EXPERIMENTAL_INTERNATIONAL
2550 allow_utf8_domains = TRUE;
2552 sender_address = parse_extract_address(argrest, &errmess,
2553 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2554 #ifdef EXPERIMENTAL_INTERNATIONAL
2555 message_smtputf8 = string_is_utf8(sender_address);
2556 allow_utf8_domains = FALSE;
2558 allow_domain_literals = FALSE;
2559 strip_trailing_dot = FALSE;
2560 if (sender_address == NULL)
2562 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2563 return EXIT_FAILURE;
2566 sender_address_forced = TRUE;
2570 /* -G: sendmail invocation to specify that it's a gateway submission and
2571 sendmail may complain about problems instead of fixing them.
2572 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2573 not at this time complain about problems. */
2579 /* -h: Set the hop count for an incoming message. Exim does not currently
2580 support this; it always computes it by counting the Received: headers.
2581 To put it in will require a change to the spool header file format. */
2586 if(++i < argc) argrest = argv[i]; else
2587 { badarg = TRUE; break; }
2589 if (!isdigit(*argrest)) badarg = TRUE;
2593 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2594 not to be documented for sendmail but mailx (at least) uses it) */
2597 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2601 /* -L: set the identifier used for syslog; equivalent to setting
2602 syslog_processname in the config file, but needs to be an admin option. */
2605 if (*argrest == '\0')
2607 if(++i < argc) argrest = argv[i]; else
2608 { badarg = TRUE; break; }
2610 sz = Ustrlen(argrest);
2613 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2614 return EXIT_FAILURE;
2618 fprintf(stderr, "exim: the -L syslog name is too short\n");
2619 return EXIT_FAILURE;
2621 cmdline_syslog_name = argrest;
2625 receiving_message = FALSE;
2627 /* -MC: continue delivery of another message via an existing open
2628 file descriptor. This option is used for an internal call by the
2629 smtp transport when there is a pending message waiting to go to an
2630 address to which it has got a connection. Five subsequent arguments are
2631 required: transport name, host name, IP address, sequence number, and
2632 message_id. Transports may decline to create new processes if the sequence
2633 number gets too big. The channel is stdin. This (-MC) must be the last
2634 argument. There's a subsequent check that the real-uid is privileged.
2636 If we are running in the test harness. delay for a bit, to let the process
2637 that set this one up complete. This makes for repeatability of the logging,
2640 if (Ustrcmp(argrest, "C") == 0)
2642 union sockaddr_46 interface_sock;
2643 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2647 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2648 return EXIT_FAILURE;
2651 if (msg_action_arg >= 0)
2653 fprintf(stderr, "exim: incompatible arguments\n");
2654 return EXIT_FAILURE;
2657 continue_transport = argv[++i];
2658 continue_hostname = argv[++i];
2659 continue_host_address = argv[++i];
2660 continue_sequence = Uatoi(argv[++i]);
2661 msg_action = MSG_DELIVER;
2662 msg_action_arg = ++i;
2663 forced_delivery = TRUE;
2664 queue_run_pid = passed_qr_pid;
2665 queue_run_pipe = passed_qr_pipe;
2667 if (!mac_ismsgid(argv[i]))
2669 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2671 return EXIT_FAILURE;
2674 /* Set up $sending_ip_address and $sending_port */
2676 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2678 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2682 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2684 return EXIT_FAILURE;
2687 if (running_in_test_harness) millisleep(500);
2691 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2692 precedes -MC (see above). The flag indicates that the host to which
2693 Exim is connected has accepted an AUTH sequence. */
2695 else if (Ustrcmp(argrest, "CA") == 0)
2697 smtp_authenticated = TRUE;
2701 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2702 that exim is connected to supports the esmtp extension DSN */
2703 else if (Ustrcmp(argrest, "CD") == 0)
2705 smtp_use_dsn = TRUE;
2709 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2710 it preceded -MC (see above) */
2712 else if (Ustrcmp(argrest, "CP") == 0)
2714 smtp_use_pipelining = TRUE;
2718 /* -MCQ: pass on the pid of the queue-running process that started
2719 this chain of deliveries and the fd of its synchronizing pipe; this
2720 is useful only when it precedes -MC (see above) */
2722 else if (Ustrcmp(argrest, "CQ") == 0)
2724 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2726 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2731 /* -MCS: set the smtp_use_size flag; this is useful only when it
2732 precedes -MC (see above) */
2734 else if (Ustrcmp(argrest, "CS") == 0)
2736 smtp_use_size = TRUE;
2740 /* -MCT: set the tls_offered flag; this is useful only when it
2741 precedes -MC (see above). The flag indicates that the host to which
2742 Exim is connected has offered TLS support. */
2745 else if (Ustrcmp(argrest, "CT") == 0)
2752 /* -M[x]: various operations on the following list of message ids:
2753 -M deliver the messages, ignoring next retry times and thawing
2754 -Mc deliver the messages, checking next retry times, no thawing
2755 -Mf freeze the messages
2756 -Mg give up on the messages
2757 -Mt thaw the messages
2758 -Mrm remove the messages
2759 In the above cases, this must be the last option. There are also the
2760 following options which are followed by a single message id, and which
2761 act on that message. Some of them use the "recipient" addresses as well.
2762 -Mar add recipient(s)
2763 -Mmad mark all recipients delivered
2764 -Mmd mark recipients(s) delivered
2766 -Mset load a message for use with -be
2768 -Mvc show copy (of whole message, in RFC 2822 format)
2773 else if (*argrest == 0)
2775 msg_action = MSG_DELIVER;
2776 forced_delivery = deliver_force_thaw = TRUE;
2778 else if (Ustrcmp(argrest, "ar") == 0)
2780 msg_action = MSG_ADD_RECIPIENT;
2781 one_msg_action = TRUE;
2783 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2784 else if (Ustrcmp(argrest, "es") == 0)
2786 msg_action = MSG_EDIT_SENDER;
2787 one_msg_action = TRUE;
2789 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2790 else if (Ustrcmp(argrest, "g") == 0)
2792 msg_action = MSG_DELIVER;
2793 deliver_give_up = TRUE;
2795 else if (Ustrcmp(argrest, "mad") == 0)
2797 msg_action = MSG_MARK_ALL_DELIVERED;
2799 else if (Ustrcmp(argrest, "md") == 0)
2801 msg_action = MSG_MARK_DELIVERED;
2802 one_msg_action = TRUE;
2804 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2805 else if (Ustrcmp(argrest, "set") == 0)
2807 msg_action = MSG_LOAD;
2808 one_msg_action = TRUE;
2810 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2811 else if (Ustrcmp(argrest, "vb") == 0)
2813 msg_action = MSG_SHOW_BODY;
2814 one_msg_action = TRUE;
2816 else if (Ustrcmp(argrest, "vc") == 0)
2818 msg_action = MSG_SHOW_COPY;
2819 one_msg_action = TRUE;
2821 else if (Ustrcmp(argrest, "vh") == 0)
2823 msg_action = MSG_SHOW_HEADER;
2824 one_msg_action = TRUE;
2826 else if (Ustrcmp(argrest, "vl") == 0)
2828 msg_action = MSG_SHOW_LOG;
2829 one_msg_action = TRUE;
2831 else { badarg = TRUE; break; }
2833 /* All the -Mxx options require at least one message id. */
2835 msg_action_arg = i + 1;
2836 if (msg_action_arg >= argc)
2838 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2839 return EXIT_FAILURE;
2842 /* Some require only message ids to follow */
2844 if (!one_msg_action)
2847 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2849 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2851 return EXIT_FAILURE;
2853 goto END_ARG; /* Remaining args are ids */
2856 /* Others require only one message id, possibly followed by addresses,
2857 which will be handled as normal arguments. */
2861 if (!mac_ismsgid(argv[msg_action_arg]))
2863 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2864 argv[msg_action_arg], arg);
2865 return EXIT_FAILURE;
2872 /* Some programs seem to call the -om option without the leading o;
2873 for sendmail it askes for "me too". Exim always does this. */
2876 if (*argrest != 0) badarg = TRUE;
2880 /* -N: don't do delivery - a debugging option that stops transports doing
2881 their thing. It implies debugging at the D_v level. */
2886 dont_deliver = TRUE;
2887 debug_selector |= D_v;
2888 debug_file = stderr;
2894 /* -n: This means "don't alias" in sendmail, apparently.
2895 For normal invocations, it has no effect.
2896 It may affect some other options. */
2902 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2903 option to the specified value. This form uses long names. We need to handle
2904 -O option=value and -Ooption=value. */
2911 fprintf(stderr, "exim: string expected after -O\n");
2919 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2922 if (*argrest == 'A')
2924 alias_arg = argrest + 1;
2925 if (alias_arg[0] == 0)
2927 if (i+1 < argc) alias_arg = argv[++i]; else
2929 fprintf(stderr, "exim: string expected after -oA\n");
2935 /* -oB: Set a connection message max value for remote deliveries */
2937 else if (*argrest == 'B')
2939 uschar *p = argrest + 1;
2942 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2944 connection_max_messages = 1;
2953 fprintf(stderr, "exim: number expected after -oB\n");
2956 connection_max_messages = Uatoi(p);
2960 /* -odb: background delivery */
2962 else if (Ustrcmp(argrest, "db") == 0)
2964 synchronous_delivery = FALSE;
2965 arg_queue_only = FALSE;
2966 queue_only_set = TRUE;
2969 /* -odf: foreground delivery (smail-compatible option); same effect as
2970 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2973 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2975 synchronous_delivery = TRUE;
2976 arg_queue_only = FALSE;
2977 queue_only_set = TRUE;
2980 /* -odq: queue only */
2982 else if (Ustrcmp(argrest, "dq") == 0)
2984 synchronous_delivery = FALSE;
2985 arg_queue_only = TRUE;
2986 queue_only_set = TRUE;
2989 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2990 but no remote delivery */
2992 else if (Ustrcmp(argrest, "dqs") == 0)
2995 arg_queue_only = FALSE;
2996 queue_only_set = TRUE;
2999 /* -oex: Sendmail error flags. As these are also accepted without the
3000 leading -o prefix, for compatibility with vacation and other callers,
3001 they are handled with -e above. */
3003 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3004 -oitrue: Another sendmail syntax for the same */
3006 else if (Ustrcmp(argrest, "i") == 0 ||
3007 Ustrcmp(argrest, "itrue") == 0)
3010 /* -oM*: Set various characteristics for an incoming message; actually
3011 acted on for trusted callers only. */
3013 else if (*argrest == 'M')
3017 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3021 /* -oMa: Set sender host address */
3023 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3025 /* -oMaa: Set authenticator name */
3027 else if (Ustrcmp(argrest, "Maa") == 0)
3028 sender_host_authenticated = argv[++i];
3030 /* -oMas: setting authenticated sender */
3032 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3034 /* -oMai: setting authenticated id */
3036 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3038 /* -oMi: Set incoming interface address */
3040 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3042 /* -oMm: Message reference */
3044 else if (Ustrcmp(argrest, "Mm") == 0)
3046 if (!mac_ismsgid(argv[i+1]))
3048 fprintf(stderr,"-oMm must be a valid message ID\n");
3051 if (!trusted_config)
3053 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3056 message_reference = argv[++i];
3059 /* -oMr: Received protocol */
3061 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3063 /* -oMs: Set sender host name */
3065 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3067 /* -oMt: Set sender ident */
3069 else if (Ustrcmp(argrest, "Mt") == 0)
3071 sender_ident_set = TRUE;
3072 sender_ident = argv[++i];
3075 /* Else a bad argument */
3084 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3085 seem to call this as -m (undocumented), so that is also accepted (see
3088 else if (Ustrcmp(argrest, "m") == 0) {}
3090 /* -oo: An ancient flag for old-style addresses which still seems to
3091 crop up in some calls (see in SCO). */
3093 else if (Ustrcmp(argrest, "o") == 0) {}
3095 /* -oP <name>: set pid file path for daemon */
3097 else if (Ustrcmp(argrest, "P") == 0)
3098 override_pid_file_path = argv[++i];
3100 /* -or <n>: set timeout for non-SMTP acceptance
3101 -os <n>: set timeout for SMTP acceptance */
3103 else if (*argrest == 'r' || *argrest == 's')
3105 int *tp = (*argrest == 'r')?
3106 &arg_receive_timeout : &arg_smtp_receive_timeout;
3107 if (argrest[1] == 0)
3109 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3111 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3114 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3119 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3121 else if (Ustrcmp(argrest, "X") == 0)
3122 override_local_interfaces = argv[++i];
3124 /* Unknown -o argument */
3130 /* -ps: force Perl startup; -pd force delayed Perl startup */
3134 if (*argrest == 's' && argrest[1] == 0)
3136 perl_start_option = 1;
3139 if (*argrest == 'd' && argrest[1] == 0)
3141 perl_start_option = -1;
3146 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3147 which sets the host protocol and host name */
3151 if (i+1 < argc) argrest = argv[++i]; else
3152 { badarg = TRUE; break; }
3157 uschar *hn = Ustrchr(argrest, ':');
3160 received_protocol = argrest;
3164 received_protocol = string_copyn(argrest, hn - argrest);
3165 sender_host_name = hn + 1;
3172 receiving_message = FALSE;
3173 if (queue_interval >= 0)
3175 fprintf(stderr, "exim: -q specified more than once\n");
3179 /* -qq...: Do queue runs in a 2-stage manner */
3181 if (*argrest == 'q')
3183 queue_2stage = TRUE;
3187 /* -qi...: Do only first (initial) deliveries */
3189 if (*argrest == 'i')
3191 queue_run_first_delivery = TRUE;
3195 /* -qf...: Run the queue, forcing deliveries
3196 -qff..: Ditto, forcing thawing as well */
3198 if (*argrest == 'f')
3200 queue_run_force = TRUE;
3201 if (*(++argrest) == 'f')
3203 deliver_force_thaw = TRUE;
3208 /* -q[f][f]l...: Run the queue only on local deliveries */
3210 if (*argrest == 'l')
3212 queue_run_local = TRUE;
3216 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3217 optionally starting from a given message id. */
3219 if (*argrest == 0 &&
3220 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3223 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3224 start_queue_run_id = argv[++i];
3225 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3226 stop_queue_run_id = argv[++i];
3229 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3230 optionally local only. */
3235 queue_interval = readconf_readtime(argrest, 0, FALSE);
3237 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3238 if (queue_interval <= 0)
3240 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3247 case 'R': /* Synonymous with -qR... */
3248 receiving_message = FALSE;
3250 /* -Rf: As -R (below) but force all deliveries,
3251 -Rff: Ditto, but also thaw all frozen messages,
3252 -Rr: String is regex
3253 -Rrf: Regex and force
3254 -Rrff: Regex and force and thaw
3256 in all cases provided there are no further characters in this
3262 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3264 if (Ustrcmp(argrest, rsopts[i]) == 0)
3266 if (i != 2) queue_run_force = TRUE;
3267 if (i >= 2) deliver_selectstring_regex = TRUE;
3268 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3269 argrest += Ustrlen(rsopts[i]);
3274 /* -R: Set string to match in addresses for forced queue run to
3275 pick out particular messages. */
3279 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3281 fprintf(stderr, "exim: string expected after -R\n");
3285 else deliver_selectstring = argrest;
3289 /* -r: an obsolete synonym for -f (see above) */
3292 /* -S: Like -R but works on sender. */
3294 case 'S': /* Synonymous with -qS... */
3295 receiving_message = FALSE;
3297 /* -Sf: As -S (below) but force all deliveries,
3298 -Sff: Ditto, but also thaw all frozen messages,
3299 -Sr: String is regex
3300 -Srf: Regex and force
3301 -Srff: Regex and force and thaw
3303 in all cases provided there are no further characters in this
3309 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3311 if (Ustrcmp(argrest, rsopts[i]) == 0)
3313 if (i != 2) queue_run_force = TRUE;
3314 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3315 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3316 argrest += Ustrlen(rsopts[i]);
3321 /* -S: Set string to match in addresses for forced queue run to
3322 pick out particular messages. */
3326 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3328 fprintf(stderr, "exim: string expected after -S\n");
3332 else deliver_selectstring_sender = argrest;
3335 /* -Tqt is an option that is exclusively for use by the testing suite.
3336 It is not recognized in other circumstances. It allows for the setting up
3337 of explicit "queue times" so that various warning/retry things can be
3338 tested. Otherwise variability of clock ticks etc. cause problems. */
3341 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3342 fudged_queue_times = argv[++i];
3347 /* -t: Set flag to extract recipients from body of message. */
3350 if (*argrest == 0) extract_recipients = TRUE;
3352 /* -ti: Set flag to extract recipients from body of message, and also
3353 specify that dot does not end the message. */
3355 else if (Ustrcmp(argrest, "i") == 0)
3357 extract_recipients = TRUE;
3361 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3364 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3371 /* -U: This means "initial user submission" in sendmail, apparently. The
3372 doc claims that in future sendmail may refuse syntactically invalid
3373 messages instead of fixing them. For the moment, we just ignore it. */
3379 /* -v: verify things - this is a very low-level debugging */
3384 debug_selector |= D_v;
3385 debug_file = stderr;
3391 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3393 The -x flag tells the sendmail command that mail from a local
3394 mail program has National Language Support (NLS) extended characters
3395 in the body of the mail item. The sendmail command can send mail with
3396 extended NLS characters across networks that normally corrupts these
3399 As Exim is 8-bit clean, it just ignores this flag. */
3402 if (*argrest != 0) badarg = TRUE;
3405 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3406 logs to that file. We swallow the parameter and otherwise ignore it. */
3409 if (*argrest == '\0')
3412 fprintf(stderr, "exim: string expected after -X\n");
3418 if (*argrest == '\0')
3419 if (++i < argc) log_oneline = argv[i]; else
3421 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3426 /* All other initial characters are errors */
3431 } /* End of high-level switch statement */
3433 /* Failed to recognize the option, or syntax error */
3437 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3438 "option %s\n", arg);
3444 /* If -R or -S have been specified without -q, assume a single queue run. */
3446 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3447 queue_interval < 0) queue_interval = 0;
3451 /* If usage_wanted is set we call the usage function - which never returns */
3452 if (usage_wanted) exim_usage(called_as);
3454 /* Arguments have been processed. Check for incompatibilities. */
3456 (smtp_input || extract_recipients || recipients_arg < argc) &&
3457 (daemon_listen || queue_interval >= 0 || bi_option ||
3458 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3459 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3462 msg_action_arg > 0 &&
3463 (daemon_listen || queue_interval >= 0 || list_options ||
3464 (checking && msg_action != MSG_LOAD) ||
3465 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3468 (daemon_listen || queue_interval >= 0) &&
3469 (sender_address != NULL || list_options || list_queue || checking ||
3473 daemon_listen && queue_interval == 0
3476 inetd_wait_mode && queue_interval >= 0
3480 (checking || smtp_input || extract_recipients ||
3481 filter_test != FTEST_NONE || bi_option)
3484 verify_address_mode &&
3485 (address_test_mode || smtp_input || extract_recipients ||
3486 filter_test != FTEST_NONE || bi_option)
3489 address_test_mode && (smtp_input || extract_recipients ||
3490 filter_test != FTEST_NONE || bi_option)
3493 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3497 deliver_selectstring != NULL && queue_interval < 0
3500 msg_action == MSG_LOAD &&
3501 (!expansion_test || expansion_test_message != NULL)
3505 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3509 /* If debugging is set up, set the file and the file descriptor to pass on to
3510 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3511 to run in the foreground. */
3513 if (debug_selector != 0)
3515 debug_file = stderr;
3516 debug_fd = fileno(debug_file);
3517 background_daemon = FALSE;
3518 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3519 if (debug_selector != D_v) /* -v only doesn't show this */
3521 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3522 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3524 if (!version_printed)
3525 show_whats_supported(stderr);
3529 /* When started with root privilege, ensure that the limits on the number of
3530 open files and the number of processes (where that is accessible) are
3531 sufficiently large, or are unset, in case Exim has been called from an
3532 environment where the limits are screwed down. Not all OS have the ability to
3533 change some of these limits. */
3537 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3543 #ifdef RLIMIT_NOFILE
3544 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3546 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3548 rlp.rlim_cur = rlp.rlim_max = 0;
3551 /* I originally chose 1000 as a nice big number that was unlikely to
3552 be exceeded. It turns out that some older OS have a fixed upper limit of
3555 if (rlp.rlim_cur < 1000)
3557 rlp.rlim_cur = rlp.rlim_max = 1000;
3558 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3560 rlp.rlim_cur = rlp.rlim_max = 256;
3561 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3562 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3569 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3571 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3573 rlp.rlim_cur = rlp.rlim_max = 0;
3576 #ifdef RLIM_INFINITY
3577 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3579 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3581 if (rlp.rlim_cur < 1000)
3583 rlp.rlim_cur = rlp.rlim_max = 1000;
3585 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3586 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3592 /* Exim is normally entered as root (but some special configurations are
3593 possible that don't do this). However, it always spins off sub-processes that
3594 set their uid and gid as required for local delivery. We don't want to pass on
3595 any extra groups that root may belong to, so we want to get rid of them all at
3598 We need to obey setgroups() at this stage, before possibly giving up root
3599 privilege for a changed configuration file, but later on we might need to
3600 check on the additional groups for the admin user privilege - can't do that
3601 till after reading the config, which might specify the exim gid. Therefore,
3602 save the group list here first. */
3604 group_count = getgroups(NGROUPS_MAX, group_list);
3605 if (group_count < 0)
3607 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3611 /* There is a fundamental difference in some BSD systems in the matter of
3612 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3613 known not to be different. On the "different" systems there is a single group
3614 list, and the first entry in it is the current group. On all other versions of
3615 Unix there is a supplementary group list, which is in *addition* to the current
3616 group. Consequently, to get rid of all extraneous groups on a "standard" system
3617 you pass over 0 groups to setgroups(), while on a "different" system you pass
3618 over a single group - the current group, which is always the first group in the
3619 list. Calling setgroups() with zero groups on a "different" system results in
3620 an error return. The following code should cope with both types of system.
3622 However, if this process isn't running as root, setgroups() can't be used
3623 since you have to be root to run it, even if throwing away groups. Not being
3624 root here happens only in some unusual configurations. We just ignore the
3627 if (setgroups(0, NULL) != 0)
3629 if (setgroups(1, group_list) != 0 && !unprivileged)
3631 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3636 /* If the configuration file name has been altered by an argument on the
3637 command line (either a new file name or a macro definition) and the caller is
3638 not root, or if this is a filter testing run, remove any setuid privilege the
3639 program has and run as the underlying user.
3641 The exim user is locked out of this, which severely restricts the use of -C
3644 Otherwise, set the real ids to the effective values (should be root unless run
3645 from inetd, which it can either be root or the exim uid, if one is configured).
3647 There is a private mechanism for bypassing some of this, in order to make it
3648 possible to test lots of configurations automatically, without having either to
3649 recompile each time, or to patch in an actual configuration file name and other
3650 values (such as the path name). If running in the test harness, pretend that
3651 configuration file changes and macro definitions haven't happened. */
3654 (!trusted_config || /* Config changed, or */
3655 !macros_trusted()) && /* impermissible macros and */
3656 real_uid != root_uid && /* Not root, and */
3657 !running_in_test_harness /* Not fudged */
3659 expansion_test /* expansion testing */
3661 filter_test != FTEST_NONE) /* Filter testing */
3663 setgroups(group_count, group_list);
3664 exim_setugid(real_uid, real_gid, FALSE,
3665 US"-C, -D, -be or -bf forces real uid");
3666 removed_privilege = TRUE;
3668 /* In the normal case when Exim is called like this, stderr is available
3669 and should be used for any logging information because attempts to write
3670 to the log will usually fail. To arrange this, we unset really_exim. However,
3671 if no stderr is available there is no point - we might as well have a go
3672 at the log (if it fails, syslog will be written).
3674 Note that if the invoker is Exim, the logs remain available. Messing with
3675 this causes unlogged successful deliveries. */
3677 if ((log_stderr != NULL) && (real_uid != exim_uid))
3678 really_exim = FALSE;
3681 /* Privilege is to be retained for the moment. It may be dropped later,
3682 depending on the job that this Exim process has been asked to do. For now, set
3683 the real uid to the effective so that subsequent re-execs of Exim are done by a
3686 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3688 /* If testing a filter, open the file(s) now, before wasting time doing other
3689 setups and reading the message. */
3691 if ((filter_test & FTEST_SYSTEM) != 0)
3693 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3696 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3698 return EXIT_FAILURE;
3702 if ((filter_test & FTEST_USER) != 0)
3704 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3707 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3709 return EXIT_FAILURE;
3713 /* Initialise lookup_list
3714 If debugging, already called above via version reporting.
3715 In either case, we initialise the list of available lookups while running
3716 as root. All dynamically modules are loaded from a directory which is
3717 hard-coded into the binary and is code which, if not a module, would be
3718 part of Exim already. Ability to modify the content of the directory
3719 is equivalent to the ability to modify a setuid binary!
3721 This needs to happen before we read the main configuration. */
3724 #ifdef EXPERIMENTAL_INTERNATIONAL
3725 if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3728 /* Read the main runtime configuration data; this gives up if there
3729 is a failure. It leaves the configuration file open so that the subsequent
3730 configuration data for delivery can be read if needed. */
3734 /* If an action on specific messages is requested, or if a daemon or queue
3735 runner is being started, we need to know if Exim was called by an admin user.
3736 This is the case if the real user is root or exim, or if the real group is
3737 exim, or if one of the supplementary groups is exim or a group listed in
3738 admin_groups. We don't fail all message actions immediately if not admin_user,
3739 since some actions can be performed by non-admin users. Instead, set admin_user
3740 for later interrogation. */
3742 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3747 for (i = 0; i < group_count; i++)
3749 if (group_list[i] == exim_gid) admin_user = TRUE;
3750 else if (admin_groups != NULL)
3752 for (j = 1; j <= (int)(admin_groups[0]); j++)
3753 if (admin_groups[j] == group_list[i])
3754 { admin_user = TRUE; break; }
3756 if (admin_user) break;
3760 /* Another group of privileged users are the trusted users. These are root,
3761 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3762 are permitted to specify sender_addresses with -f on the command line, and
3763 other message parameters as well. */
3765 if (real_uid == root_uid || real_uid == exim_uid)
3766 trusted_caller = TRUE;
3771 if (trusted_users != NULL)
3773 for (i = 1; i <= (int)(trusted_users[0]); i++)
3774 if (trusted_users[i] == real_uid)
3775 { trusted_caller = TRUE; break; }
3778 if (!trusted_caller && trusted_groups != NULL)
3780 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3782 if (trusted_groups[i] == real_gid)
3783 trusted_caller = TRUE;
3784 else for (j = 0; j < group_count; j++)
3786 if (trusted_groups[i] == group_list[j])
3787 { trusted_caller = TRUE; break; }
3789 if (trusted_caller) break;
3794 /* Handle the decoding of logging options. */
3796 decode_bits(log_selector, log_selector_size, log_notall,
3797 log_selector_string, log_options, log_options_count, US"log", 0);
3802 debug_printf("configuration file is %s\n", config_main_filename);
3803 debug_printf("log selectors =");
3804 for (i = 0; i < log_selector_size; i++)
3805 debug_printf(" %08x", log_selector[i]);
3809 /* If domain literals are not allowed, check the sender address that was
3810 supplied with -f. Ditto for a stripped trailing dot. */
3812 if (sender_address != NULL)
3814 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3816 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3817 "allowed\n", sender_address);
3818 return EXIT_FAILURE;
3820 if (f_end_dot && !strip_trailing_dot)
3822 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3823 "(trailing dot not allowed)\n", sender_address);
3824 return EXIT_FAILURE;
3828 /* See if an admin user overrode our logging. */
3830 if (cmdline_syslog_name != NULL)
3834 syslog_processname = cmdline_syslog_name;
3835 log_file_path = string_copy(CUS"syslog");
3839 /* not a panic, non-privileged users should not be able to spam paniclog */
3841 "exim: you lack sufficient privilege to specify syslog process name\n");
3842 return EXIT_FAILURE;
3846 /* Paranoia check of maximum lengths of certain strings. There is a check
3847 on the length of the log file path in log.c, which will come into effect
3848 if there are any calls to write the log earlier than this. However, if we
3849 get this far but the string is very long, it is better to stop now than to
3850 carry on and (e.g.) receive a message and then have to collapse. The call to
3851 log_write() from here will cause the ultimate panic collapse if the complete
3852 file name exceeds the buffer length. */
3854 if (Ustrlen(log_file_path) > 200)
3855 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3856 "log_file_path is longer than 200 chars: aborting");
3858 if (Ustrlen(pid_file_path) > 200)
3859 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3860 "pid_file_path is longer than 200 chars: aborting");
3862 if (Ustrlen(spool_directory) > 200)
3863 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3864 "spool_directory is longer than 200 chars: aborting");
3866 /* Length check on the process name given to syslog for its TAG field,
3867 which is only permitted to be 32 characters or less. See RFC 3164. */
3869 if (Ustrlen(syslog_processname) > 32)
3870 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3871 "syslog_processname is longer than 32 chars: aborting");
3877 log_write(0, LOG_MAIN, "%s", log_oneline);
3878 return EXIT_SUCCESS;
3881 return EXIT_FAILURE;
3884 /* In some operating systems, the environment variable TMPDIR controls where
3885 temporary files are created; Exim doesn't use these (apart from when delivering
3886 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3887 If TMPDIR is found in the environment, reset it to the value defined in the
3888 TMPDIR macro, if this macro is defined. */
3893 for (p = USS environ; *p != NULL; p++)
3895 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3896 Ustrcmp(*p+7, TMPDIR) != 0)
3898 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3899 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3901 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3907 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3908 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3909 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3910 called by a user who has set the TZ variable. This then affects the timestamps
3911 in log files and in Received: headers, and any created Date: header lines. The
3912 required timezone is settable in the configuration file, so nothing can be done
3913 about this earlier - but hopefully nothing will normally be logged earlier than
3914 this. We have to make a new environment if TZ is wrong, but don't bother if
3915 timestamps_utc is set, because then all times are in UTC anyway. */
3917 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3919 timestamps_utc = TRUE;
3923 uschar *envtz = US getenv("TZ");
3924 if ((envtz == NULL && timezone_string != NULL) ||
3926 (timezone_string == NULL ||
3927 Ustrcmp(timezone_string, envtz) != 0)))
3929 uschar **p = USS environ;
3933 while (*p++ != NULL) count++;
3934 if (envtz == NULL) count++;
3935 newp = new = malloc(sizeof(uschar *) * (count + 1));
3936 for (p = USS environ; *p != NULL; p++)
3938 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3941 if (timezone_string != NULL)
3943 *newp = malloc(Ustrlen(timezone_string) + 4);
3944 sprintf(CS *newp++, "TZ=%s", timezone_string);
3949 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3950 tod_stamp(tod_log));
3954 /* Handle the case when we have removed the setuid privilege because of -C or
3955 -D. This means that the caller of Exim was not root.
3957 There is a problem if we were running as the Exim user. The sysadmin may
3958 expect this case to retain privilege because "the binary was called by the
3959 Exim user", but it hasn't, because either the -D option set macros, or the
3960 -C option set a non-trusted configuration file. There are two possibilities:
3962 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3963 to do message deliveries. Thus, the fact that it is running as a
3964 non-privileged user is plausible, and might be wanted in some special
3965 configurations. However, really_exim will have been set false when
3966 privilege was dropped, to stop Exim trying to write to its normal log
3967 files. Therefore, re-enable normal log processing, assuming the sysadmin
3968 has set up the log directory correctly.
3970 (2) If deliver_drop_privilege is not set, the configuration won't work as
3971 apparently intended, and so we log a panic message. In order to retain
3972 root for -C or -D, the caller must either be root or be invoking a
3973 trusted configuration file (when deliver_drop_privilege is false). */
3975 if (removed_privilege && (!trusted_config || macros != NULL) &&
3976 real_uid == exim_uid)
3978 if (deliver_drop_privilege)
3979 really_exim = TRUE; /* let logging work normally */
3981 log_write(0, LOG_MAIN|LOG_PANIC,
3982 "exim user lost privilege for using %s option",
3983 trusted_config? "-D" : "-C");
3986 /* Start up Perl interpreter if Perl support is configured and there is a
3987 perl_startup option, and the configuration or the command line specifies
3988 initializing starting. Note that the global variables are actually called
3989 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3992 if (perl_start_option != 0)
3993 opt_perl_at_start = (perl_start_option > 0);
3994 if (opt_perl_at_start && opt_perl_startup != NULL)
3997 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3998 errstr = init_perl(opt_perl_startup);
4001 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
4002 return EXIT_FAILURE;
4004 opt_perl_started = TRUE;
4006 #endif /* EXIM_PERL */
4008 /* Log the arguments of the call if the configuration file said so. This is
4009 a debugging feature for finding out what arguments certain MUAs actually use.
4010 Don't attempt it if logging is disabled, or if listing variables or if
4011 verifying/testing addresses or expansions. */
4013 if (((debug_selector & D_any) != 0 || LOGGING(arguments))
4014 && really_exim && !list_options && !checking)
4017 uschar *p = big_buffer;
4019 Ustrcpy(p, "cwd= (failed)");
4020 dummy = /* quieten compiler */ getcwd(CS p+4, big_buffer_size - 4);
4022 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4024 for (i = 0; i < argc; i++)
4026 int len = Ustrlen(argv[i]);
4027 const uschar *printing;
4029 if (p + len + 8 >= big_buffer + big_buffer_size)
4032 log_write(0, LOG_MAIN, "%s", big_buffer);
4033 Ustrcpy(big_buffer, "...");
4036 printing = string_printing(argv[i]);
4037 if (printing[0] == 0) quote = US"\""; else
4039 const uschar *pp = printing;
4041 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
4043 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4044 (p - big_buffer) - 4), printing, quote);
4048 if (LOGGING(arguments))
4049 log_write(0, LOG_MAIN, "%s", big_buffer);
4051 debug_printf("%s\n", big_buffer);
4054 /* Set the working directory to be the top-level spool directory. We don't rely
4055 on this in the code, which always uses fully qualified names, but it's useful
4056 for core dumps etc. Don't complain if it fails - the spool directory might not
4057 be generally accessible and calls with the -C option (and others) have lost
4058 privilege by now. Before the chdir, we try to ensure that the directory exists.
4061 if (Uchdir(spool_directory) != 0)
4064 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4065 dummy = /* quieten compiler */ Uchdir(spool_directory);
4068 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4069 alias file. Exim doesn't have such a concept, but this call is screwed into
4070 Sun's YP makefiles. Handle this by calling a configured script, as the real
4071 user who called Exim. The -oA option can be used to pass an argument to the
4076 (void)fclose(config_file);
4077 if (bi_command != NULL)
4081 argv[i++] = bi_command;
4082 if (alias_arg != NULL) argv[i++] = alias_arg;
4085 setgroups(group_count, group_list);
4086 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4088 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4089 (argv[1] == NULL)? US"" : argv[1]);
4091 execv(CS argv[0], (char *const *)argv);
4092 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
4097 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4102 /* We moved the admin/trusted check to be immediately after reading the
4103 configuration file. We leave these prints here to ensure that syslog setup,
4104 logfile setup, and so on has already happened. */
4106 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4107 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
4109 /* Only an admin user may start the daemon or force a queue run in the default
4110 configuration, but the queue run restriction can be relaxed. Only an admin
4111 user may request that a message be returned to its sender forthwith. Only an
4112 admin user may specify a debug level greater than D_v (because it might show
4113 passwords, etc. in lookup queries). Only an admin user may request a queue
4114 count. Only an admin user can use the test interface to scan for email
4115 (because Exim will be in the spool dir and able to look at mails). */
4119 BOOL debugset = (debug_selector & ~D_v) != 0;
4120 if (deliver_give_up || daemon_listen || malware_test_file ||
4121 (count_queue && queue_list_requires_admin) ||
4122 (list_queue && queue_list_requires_admin) ||
4123 (queue_interval >= 0 && prod_requires_admin) ||
4124 (debugset && !running_in_test_harness))
4126 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
4131 /* If the real user is not root or the exim uid, the argument for passing
4132 in an open TCP/IP connection for another message is not permitted, nor is
4133 running with the -N option for any delivery action, unless this call to exim is
4134 one that supplied an input message, or we are using a patched exim for
4135 regression testing. */
4137 if (real_uid != root_uid && real_uid != exim_uid &&
4138 (continue_hostname != NULL ||
4140 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
4141 )) && !running_in_test_harness)
4143 fprintf(stderr, "exim: Permission denied\n");
4144 return EXIT_FAILURE;
4147 /* If the caller is not trusted, certain arguments are ignored when running for
4148 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4149 Note that authority for performing certain actions on messages is tested in the
4150 queue_action() function. */
4152 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
4154 sender_host_name = sender_host_address = interface_address =
4155 sender_ident = received_protocol = NULL;
4156 sender_host_port = interface_port = 0;
4157 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4160 /* If a sender host address is set, extract the optional port number off the
4161 end of it and check its syntax. Do the same thing for the interface address.
4162 Exim exits if the syntax is bad. */
4166 if (sender_host_address != NULL)
4167 sender_host_port = check_port(sender_host_address);
4168 if (interface_address != NULL)
4169 interface_port = check_port(interface_address);
4172 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4177 suppress_local_fixups = suppress_local_fixups_default = TRUE;
4178 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4182 fprintf(stderr, "exim: permission denied (-G requires a trusted user)\n");
4183 return EXIT_FAILURE;
4187 /* If an SMTP message is being received check to see if the standard input is a
4188 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4189 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4194 union sockaddr_46 inetd_sock;
4195 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4196 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4198 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4199 if (family == AF_INET || family == AF_INET6)
4201 union sockaddr_46 interface_sock;
4202 size = sizeof(interface_sock);
4204 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4205 interface_address = host_ntoa(-1, &interface_sock, NULL,
4208 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4210 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4213 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4214 NULL, &sender_host_port);
4215 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4216 "inetd is not supported when mua_wrapper is set");
4221 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4222 return EXIT_FAILURE;
4228 /* If the load average is going to be needed while receiving a message, get it
4229 now for those OS that require the first call to os_getloadavg() to be done as
4230 root. There will be further calls later for each message received. */
4232 #ifdef LOAD_AVG_NEEDS_ROOT
4233 if (receiving_message &&
4234 (queue_only_load >= 0 ||
4235 (is_inetd && smtp_load_reserve >= 0)
4238 load_average = OS_GETLOADAVG();
4242 /* The queue_only configuration option can be overridden by -odx on the command
4243 line, except that if queue_only_override is false, queue_only cannot be unset
4244 from the command line. */
4246 if (queue_only_set && (queue_only_override || arg_queue_only))
4247 queue_only = arg_queue_only;
4249 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4252 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4253 if (arg_smtp_receive_timeout >= 0)
4254 smtp_receive_timeout = arg_smtp_receive_timeout;
4256 /* If Exim was started with root privilege, unless we have already removed the
4257 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4258 except when starting the daemon or doing some kind of delivery or address
4259 testing (-bt). These are the only cases when root need to be retained. We run
4260 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4261 retained only for starting the daemon. We always do the initgroups() in this
4262 situation (controlled by the TRUE below), in order to be as close as possible
4263 to the state Exim usually runs in. */
4265 if (!unprivileged && /* originally had root AND */
4266 !removed_privilege && /* still got root AND */
4267 !daemon_listen && /* not starting the daemon */
4268 queue_interval <= 0 && /* (either kind of daemon) */
4270 deliver_drop_privilege || /* requested unprivileged */
4272 queue_interval < 0 && /* not running the queue */
4273 (msg_action_arg < 0 || /* and */
4274 msg_action != MSG_DELIVER) && /* not delivering and */
4275 (!checking || !address_test_mode) /* not address checking */
4279 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4282 /* When we are retaining a privileged uid, we still change to the exim gid. */
4287 rv = setgid(exim_gid);
4288 /* Impact of failure is that some stuff might end up with an incorrect group.
4289 We track this for failures from root, since any attempt to change privilege
4290 by root should succeed and failures should be examined. For non-root,
4291 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4292 no need to complain then. */
4295 if (!(unprivileged || removed_privilege))
4298 "exim: changing group failed: %s\n", strerror(errno));
4302 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4303 (long int)exim_gid, strerror(errno));
4307 /* Handle a request to scan a file for malware */
4308 if (malware_test_file)
4310 #ifdef WITH_CONTENT_SCAN
4312 set_process_info("scanning file for malware");
4313 result = malware_in_file(malware_test_file);
4316 printf("No malware found.\n");
4321 printf("Malware lookup returned non-okay/fail: %d\n", result);
4325 printf("Malware found: %s\n", malware_name);
4327 printf("Malware scan detected malware of unknown name.\n");
4329 printf("Malware scanning not enabled at compile time.\n");
4334 /* Handle a request to list the delivery queue */
4338 set_process_info("listing the queue");
4339 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4343 /* Handle a request to count the delivery queue */
4347 set_process_info("counting the queue");
4352 /* Handle actions on specific messages, except for the force delivery and
4353 message load actions, which are done below. Some actions take a whole list of
4354 message ids, which are known to continue up to the end of the arguments. Others
4355 take a single message id and then operate on the recipients list. */
4357 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4359 int yield = EXIT_SUCCESS;
4360 set_process_info("acting on specified messages");
4362 if (!one_msg_action)
4364 for (i = msg_action_arg; i < argc; i++)
4365 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4366 yield = EXIT_FAILURE;
4369 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4370 recipients_arg)) yield = EXIT_FAILURE;
4374 /* We used to set up here to skip reading the ACL section, on
4375 (msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen)
4376 Now, since the intro of the ${acl } expansion, ACL definitions may be
4377 needed in transports so we lost the optimisation. */
4381 /* The configuration data will have been read into POOL_PERM because we won't
4382 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
4383 this is just a bit of pedantic tidiness. It wouldn't really matter if the
4384 configuration were read into POOL_MAIN, because we don't do any resets till
4385 later on. However, it seems right, and it does ensure that both pools get used.
4388 store_pool = POOL_MAIN;
4390 /* Handle the -brt option. This is for checking out retry configurations.
4391 The next three arguments are a domain name or a complete address, and
4392 optionally two error numbers. All it does is to call the function that
4393 scans the retry configuration data. */
4395 if (test_retry_arg >= 0)
4397 retry_config *yield;
4398 int basic_errno = 0;
4402 if (test_retry_arg >= argc)
4404 printf("-brt needs a domain or address argument\n");
4405 exim_exit(EXIT_FAILURE);
4407 s1 = argv[test_retry_arg++];
4410 /* If the first argument contains no @ and no . it might be a local user
4411 or it might be a single-component name. Treat as a domain. */
4413 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4415 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4416 "being \ntreated as a one-component domain, not as a local part.\n\n",
4420 /* There may be an optional second domain arg. */
4422 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4423 s2 = argv[test_retry_arg++];
4425 /* The final arg is an error name */
4427 if (test_retry_arg < argc)
4429 uschar *ss = argv[test_retry_arg];
4431 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4434 printf("%s\n", CS error);
4435 return EXIT_FAILURE;
4438 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4439 code > 100 as an error is for matching codes to the decade. Turn them into
4440 a real error code, off the decade. */
4442 if (basic_errno == ERRNO_MAIL4XX ||
4443 basic_errno == ERRNO_RCPT4XX ||
4444 basic_errno == ERRNO_DATA4XX)
4446 int code = (more_errno >> 8) & 255;
4448 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4449 else if (code > 100)
4450 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4454 yield = retry_find_config(s1, s2, basic_errno, more_errno);
4455 if (yield == NULL) printf("No retry information found\n"); else
4458 more_errno = yield->more_errno;
4459 printf("Retry rule: %s ", yield->pattern);
4461 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4463 printf("quota%s%s ",
4464 (more_errno > 0)? "_" : "",
4465 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4467 else if (yield->basic_errno == ECONNREFUSED)
4469 printf("refused%s%s ",
4470 (more_errno > 0)? "_" : "",
4471 (more_errno == 'M')? "MX" :
4472 (more_errno == 'A')? "A" : "");
4474 else if (yield->basic_errno == ETIMEDOUT)
4477 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4479 if (more_errno != 0) printf("_%s",
4480 (more_errno == 'M')? "MX" : "A");
4483 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4484 printf("auth_failed ");
4487 for (r = yield->rules; r != NULL; r = r->next)
4489 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4490 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4496 printf(",%d.", x/1000);
4510 exim_exit(EXIT_SUCCESS);
4513 /* Handle a request to list one or more configuration options */
4514 /* If -n was set, we suppress some information */
4518 set_process_info("listing variables");
4519 if (recipients_arg >= argc) readconf_print(US"all", NULL, flag_n);
4520 else for (i = recipients_arg; i < argc; i++)
4523 (Ustrcmp(argv[i], "router") == 0 ||
4524 Ustrcmp(argv[i], "transport") == 0 ||
4525 Ustrcmp(argv[i], "authenticator") == 0 ||
4526 Ustrcmp(argv[i], "macro") == 0))
4528 readconf_print(argv[i+1], argv[i], flag_n);
4531 else readconf_print(argv[i], NULL, flag_n);
4533 exim_exit(EXIT_SUCCESS);
4537 /* Handle a request to deliver one or more messages that are already on the
4538 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4539 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4541 Delivery of specific messages is typically used for a small number when
4542 prodding by hand (when the option forced_delivery will be set) or when
4543 re-execing to regain root privilege. Each message delivery must happen in a
4544 separate process, so we fork a process for each one, and run them sequentially
4545 so that debugging output doesn't get intertwined, and to avoid spawning too
4546 many processes if a long list is given. However, don't fork for the last one;
4547 this saves a process in the common case when Exim is called to deliver just one
4550 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4552 if (prod_requires_admin && !admin_user)
4554 fprintf(stderr, "exim: Permission denied\n");
4555 exim_exit(EXIT_FAILURE);
4557 set_process_info("delivering specified messages");
4558 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
4559 for (i = msg_action_arg; i < argc; i++)
4564 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4565 else if ((pid = fork()) == 0)
4567 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4568 _exit(EXIT_SUCCESS);
4572 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4574 exim_exit(EXIT_FAILURE);
4578 exim_exit(EXIT_SUCCESS);
4582 /* If only a single queue run is requested, without SMTP listening, we can just
4583 turn into a queue runner, with an optional starting message id. */
4585 if (queue_interval == 0 && !daemon_listen)
4587 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4588 (start_queue_run_id == NULL)? US"" : US" starting at ",
4589 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
4590 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
4591 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
4592 set_process_info("running the queue (single queue run)");
4593 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4594 exim_exit(EXIT_SUCCESS);
4598 /* Find the login name of the real user running this process. This is always
4599 needed when receiving a message, because it is written into the spool file. It
4600 may also be used to construct a from: or a sender: header, and in this case we
4601 need the user's full name as well, so save a copy of it, checked for RFC822
4602 syntax and munged if necessary, if it hasn't previously been set by the -F
4603 argument. We may try to get the passwd entry more than once, in case NIS or
4604 other delays are in evidence. Save the home directory for use in filter testing
4609 if ((pw = getpwuid(real_uid)) != NULL)
4611 originator_login = string_copy(US pw->pw_name);
4612 originator_home = string_copy(US pw->pw_dir);
4614 /* If user name has not been set by -F, set it from the passwd entry
4615 unless -f has been used to set the sender address by a trusted user. */
4617 if (originator_name == NULL)
4619 if (sender_address == NULL ||
4620 (!trusted_caller && filter_test == FTEST_NONE))
4622 uschar *name = US pw->pw_gecos;
4623 uschar *amp = Ustrchr(name, '&');
4626 /* Most Unix specify that a '&' character in the gecos field is
4627 replaced by a copy of the login name, and some even specify that
4628 the first character should be upper cased, so that's what we do. */
4633 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4634 amp - name, name, &loffset, originator_login, amp + 1);
4635 buffer[loffset] = toupper(buffer[loffset]);
4639 /* If a pattern for matching the gecos field was supplied, apply
4640 it and then expand the name string. */
4642 if (gecos_pattern != NULL && gecos_name != NULL)
4645 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4647 if (regex_match_and_setup(re, name, 0, -1))
4649 uschar *new_name = expand_string(gecos_name);
4651 if (new_name != NULL)
4653 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4654 "gecos field \"%s\"\n", new_name, name);
4657 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4658 "\"%s\": %s\n", gecos_name, expand_string_message);
4660 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4661 "gecos field \"%s\"\n", gecos_pattern, name);
4662 store_free((void *)re);
4664 originator_name = string_copy(name);
4667 /* A trusted caller has used -f but not -F */
4669 else originator_name = US"";
4672 /* Break the retry loop */
4677 if (++i > finduser_retries) break;
4681 /* If we cannot get a user login, log the incident and give up, unless the
4682 configuration specifies something to use. When running in the test harness,
4683 any setting of unknown_login overrides the actual name. */
4685 if (originator_login == NULL || running_in_test_harness)
4687 if (unknown_login != NULL)
4689 originator_login = expand_string(unknown_login);
4690 if (originator_name == NULL && unknown_username != NULL)
4691 originator_name = expand_string(unknown_username);
4692 if (originator_name == NULL) originator_name = US"";
4694 if (originator_login == NULL)
4695 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4699 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4702 originator_name = string_copy(parse_fix_phrase(originator_name,
4703 Ustrlen(originator_name), big_buffer, big_buffer_size));
4705 /* If a message is created by this call of Exim, the uid/gid of its originator
4706 are those of the caller. These values are overridden if an existing message is
4707 read in from the spool. */
4709 originator_uid = real_uid;
4710 originator_gid = real_gid;
4712 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4713 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4715 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4716 returns. We leave this till here so that the originator_ fields are available
4717 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4720 if (daemon_listen || inetd_wait_mode || queue_interval > 0)
4724 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4725 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4726 "mua_wrapper is set");
4731 /* If the sender ident has not been set (by a trusted caller) set it to
4732 the caller. This will get overwritten below for an inetd call. If a trusted
4733 caller has set it empty, unset it. */
4735 if (sender_ident == NULL) sender_ident = originator_login;
4736 else if (sender_ident[0] == 0) sender_ident = NULL;
4738 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4739 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4740 originator_* variables set. */
4742 if (test_rewrite_arg >= 0)
4744 really_exim = FALSE;
4745 if (test_rewrite_arg >= argc)
4747 printf("-brw needs an address argument\n");
4748 exim_exit(EXIT_FAILURE);
4750 rewrite_test(argv[test_rewrite_arg]);
4751 exim_exit(EXIT_SUCCESS);
4754 /* A locally-supplied message is considered to be coming from a local user
4755 unless a trusted caller supplies a sender address with -f, or is passing in the
4756 message via SMTP (inetd invocation or otherwise). */
4758 if ((sender_address == NULL && !smtp_input) ||
4759 (!trusted_caller && filter_test == FTEST_NONE))
4761 sender_local = TRUE;
4763 /* A trusted caller can supply authenticated_sender and authenticated_id
4764 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4765 defaults except when host checking. */
4767 if (authenticated_sender == NULL && !host_checking)
4768 authenticated_sender = string_sprintf("%s@%s", originator_login,
4769 qualify_domain_sender);
4770 if (authenticated_id == NULL && !host_checking)
4771 authenticated_id = originator_login;
4774 /* Trusted callers are always permitted to specify the sender address.
4775 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4776 is specified is the empty address. However, if a trusted caller does not
4777 specify a sender address for SMTP input, we leave sender_address unset. This
4778 causes the MAIL commands to be honoured. */
4780 if ((!smtp_input && sender_address == NULL) ||
4781 !receive_check_set_sender(sender_address))
4783 /* Either the caller is not permitted to set a general sender, or this is
4784 non-SMTP input and the trusted caller has not set a sender. If there is no
4785 sender, or if a sender other than <> is set, override with the originator's
4786 login (which will get qualified below), except when checking things. */
4788 if (sender_address == NULL /* No sender_address set */
4790 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4791 !checking && /* Not running tests, AND */
4792 filter_test == FTEST_NONE)) /* Not testing a filter */
4794 sender_address = originator_login;
4795 sender_address_forced = FALSE;
4796 sender_address_domain = 0;
4800 /* Remember whether an untrusted caller set the sender address */
4802 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4804 /* Ensure that the sender address is fully qualified unless it is the empty
4805 address, which indicates an error message, or doesn't exist (root caller, smtp
4806 interface, no -f argument). */
4808 if (sender_address != NULL && sender_address[0] != 0 &&
4809 sender_address_domain == 0)
4810 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4811 qualify_domain_sender);
4813 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4815 /* Handle a request to verify a list of addresses, or test them for delivery.
4816 This must follow the setting of the sender address, since routers can be
4817 predicated upon the sender. If no arguments are given, read addresses from
4818 stdin. Set debug_level to at least D_v to get full output for address testing.
4821 if (verify_address_mode || address_test_mode)
4824 int flags = vopt_qualify;
4826 if (verify_address_mode)
4828 if (!verify_as_sender) flags |= vopt_is_recipient;
4829 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4834 flags |= vopt_is_recipient;
4835 debug_selector |= D_v;
4836 debug_file = stderr;
4837 debug_fd = fileno(debug_file);
4838 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4841 if (recipients_arg < argc)
4843 while (recipients_arg < argc)
4845 uschar *s = argv[recipients_arg++];
4848 BOOL finished = FALSE;
4849 uschar *ss = parse_find_address_end(s, FALSE);
4850 if (*ss == ',') *ss = 0; else finished = TRUE;
4851 test_address(s, flags, &exit_value);
4854 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4861 uschar *s = get_stdinput(NULL, NULL);
4862 if (s == NULL) break;
4863 test_address(s, flags, &exit_value);
4867 exim_exit(exit_value);
4870 /* Handle expansion checking. Either expand items on the command line, or read
4871 from stdin if there aren't any. If -Mset was specified, load the message so
4872 that its variables can be used, but restrict this facility to admin users.
4873 Otherwise, if -bem was used, read a message from stdin. */
4877 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4879 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4882 fprintf(stderr, "exim: permission denied\n");
4885 message_id = argv[msg_action_arg];
4886 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4887 if (!spool_open_datafile(message_id))
4888 printf ("Failed to load message datafile %s\n", message_id);
4889 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4890 printf ("Failed to load message %s\n", message_id);
4893 /* Read a test message from a file. We fudge it up to be on stdin, saving
4894 stdin itself for later reading of expansion strings. */
4896 else if (expansion_test_message != NULL)
4898 int save_stdin = dup(0);
4899 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4902 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4904 return EXIT_FAILURE;
4907 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4908 message_ended = END_NOTENDED;
4909 read_message_body(receive_msg(extract_recipients));
4910 message_linecount += body_linecount;
4911 (void)dup2(save_stdin, 0);
4912 (void)close(save_stdin);
4913 clearerr(stdin); /* Required by Darwin */
4916 /* Allow $recipients for this testing */
4918 enable_dollar_recipients = TRUE;
4920 /* Expand command line items */
4922 if (recipients_arg < argc)
4924 while (recipients_arg < argc)
4926 uschar *s = argv[recipients_arg++];
4927 uschar *ss = expand_string(s);
4928 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4929 else printf("%s\n", CS ss);
4937 char *(*fn_readline)(const char *) = NULL;
4938 void (*fn_addhist)(const char *) = NULL;
4941 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4947 uschar *source = get_stdinput(fn_readline, fn_addhist);
4948 if (source == NULL) break;
4949 ss = expand_string(source);
4951 printf ("Failed: %s\n", expand_string_message);
4952 else printf("%s\n", CS ss);
4956 if (dlhandle != NULL) dlclose(dlhandle);
4960 /* The data file will be open after -Mset */
4962 if (deliver_datafile >= 0)
4964 (void)close(deliver_datafile);
4965 deliver_datafile = -1;
4968 exim_exit(EXIT_SUCCESS);
4972 /* The active host name is normally the primary host name, but it can be varied
4973 for hosts that want to play several parts at once. We need to ensure that it is
4974 set for host checking, and for receiving messages. */
4976 smtp_active_hostname = primary_hostname;
4977 if (raw_active_hostname != NULL)
4979 uschar *nah = expand_string(raw_active_hostname);
4982 if (!expand_string_forcedfail)
4983 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4984 "(smtp_active_hostname): %s", raw_active_hostname,
4985 expand_string_message);
4987 else if (nah[0] != 0) smtp_active_hostname = nah;
4990 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4991 given IP address so that the blocking and relay configuration can be tested.
4992 Unless a sender_ident was set by -oMt, we discard it (the default is the
4993 caller's login name). An RFC 1413 call is made only if we are running in the
4994 test harness and an incoming interface and both ports are specified, because
4995 there is no TCP/IP call to find the ident for. */
5002 if (!sender_ident_set)
5004 sender_ident = NULL;
5005 if (running_in_test_harness && sender_host_port != 0 &&
5006 interface_address != NULL && interface_port != 0)
5007 verify_get_ident(1413);
5010 /* In case the given address is a non-canonical IPv6 address, canonicize
5011 it. The code works for both IPv4 and IPv6, as it happens. */
5013 size = host_aton(sender_host_address, x);
5014 sender_host_address = store_get(48); /* large enough for full IPv6 */
5015 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5017 /* Now set up for testing */
5019 host_build_sender_fullhost();
5023 sender_local = FALSE;
5024 sender_host_notsocket = TRUE;
5025 debug_file = stderr;
5026 debug_fd = fileno(debug_file);
5027 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5028 "**** but without any ident (RFC 1413) callback.\n"
5029 "**** This is not for real!\n\n",
5030 sender_host_address);
5032 if (verify_check_host(&hosts_connection_nolog) == OK)
5033 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5034 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5036 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5037 because a log line has already been written for all its failure exists
5038 (usually "connection refused: <reason>") and writing another one is
5039 unnecessary clutter. */
5041 if (smtp_start_session())
5043 reset_point = store_get(0);
5046 store_reset(reset_point);
5047 if (smtp_setup_msg() <= 0) break;
5048 if (!receive_msg(FALSE)) break;
5052 exim_exit(EXIT_SUCCESS);
5056 /* Arrange for message reception if recipients or SMTP were specified;
5057 otherwise complain unless a version print (-bV) happened or this is a filter
5058 verification test or info dump.
5059 In the former case, show the configuration file name. */
5061 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5063 if (version_printed)
5065 printf("Configuration file is %s\n", config_main_filename);
5066 return EXIT_SUCCESS;
5069 if (info_flag != CMDINFO_NONE)
5071 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5072 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5075 if (filter_test == FTEST_NONE)
5076 exim_usage(called_as);
5080 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5081 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5082 that we are not called from inetd, because that is rejected above. The
5083 following configuration settings are forced here:
5085 (1) Synchronous delivery (-odi)
5086 (2) Errors to stderr (-oep == -oeq)
5087 (3) No parallel remote delivery
5088 (4) Unprivileged delivery
5090 We don't force overall queueing options because there are several of them;
5091 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5092 to override any SMTP queueing. */
5096 synchronous_delivery = TRUE;
5097 arg_error_handling = ERRORS_STDERR;
5098 remote_max_parallel = 1;
5099 deliver_drop_privilege = TRUE;
5101 queue_smtp_domains = NULL;
5102 #ifdef EXPERIMENTAL_INTERNATIONAL
5103 message_utf8_downconvert = -1; /* convert-if-needed */
5108 /* Prepare to accept one or more new messages on the standard input. When a
5109 message has been read, its id is returned in message_id[]. If doing immediate
5110 delivery, we fork a delivery process for each received message, except for the
5111 last one, where we can save a process switch.
5113 It is only in non-smtp mode that error_handling is allowed to be changed from
5114 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5115 sendmail error modes other than -oem ever actually used? Later: yes.) */
5117 if (!smtp_input) error_handling = arg_error_handling;
5119 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5120 logging being sent down the socket and make an identd call to get the
5125 (void)fclose(stderr);
5126 exim_nullstd(); /* Re-open to /dev/null */
5127 verify_get_ident(IDENT_PORT);
5128 host_build_sender_fullhost();
5129 set_process_info("handling incoming connection from %s via inetd",
5133 /* If the sender host address has been set, build sender_fullhost if it hasn't
5134 already been done (which it will have been for inetd). This caters for the
5135 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5136 so that the test for IP options is skipped for -bs input. */
5138 if (sender_host_address != NULL && sender_fullhost == NULL)
5140 host_build_sender_fullhost();
5141 set_process_info("handling incoming connection from %s via -oMa",
5143 sender_host_notsocket = TRUE;
5146 /* Otherwise, set the sender host as unknown except for inetd calls. This
5147 prevents host checking in the case of -bs not from inetd and also for -bS. */
5149 else if (!is_inetd) sender_host_unknown = TRUE;
5151 /* If stdout does not exist, then dup stdin to stdout. This can happen
5152 if exim is started from inetd. In this case fd 0 will be set to the socket,
5153 but fd 1 will not be set. This also happens for passed SMTP channels. */
5155 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5157 /* Set up the incoming protocol name and the state of the program. Root is
5158 allowed to force received protocol via the -oMr option above. If we have come
5159 via inetd, the process info has already been set up. We don't set
5160 received_protocol here for smtp input, as it varies according to
5161 batch/HELO/EHLO/AUTH/TLS. */
5165 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5166 smtp_batched_input? "batched " : "",
5167 (sender_address!= NULL)? sender_address : originator_login);
5171 if (received_protocol == NULL)
5172 received_protocol = string_sprintf("local%s", called_as);
5173 set_process_info("accepting a local non-SMTP message from <%s>",
5177 /* Initialize the session_local_queue-only flag (this will be ignored if
5178 mua_wrapper is set) */
5181 session_local_queue_only = queue_only;
5183 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5184 the spool if so configured. On failure, we must not attempt to send an error
5185 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5186 error code is given.) */
5188 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5190 fprintf(stderr, "exim: insufficient disk space\n");
5191 return EXIT_FAILURE;
5194 /* If this is smtp input of any kind, real or batched, handle the start of the
5197 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5198 because a log line has already been written for all its failure exists
5199 (usually "connection refused: <reason>") and writing another one is
5200 unnecessary clutter. */
5206 if (verify_check_host(&hosts_connection_nolog) == OK)
5207 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5208 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5209 if (!smtp_start_session())
5212 exim_exit(EXIT_SUCCESS);
5216 /* Otherwise, set up the input size limit here. */
5220 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5221 if (expand_string_message != NULL)
5223 if (thismessage_size_limit == -1)
5224 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5225 "message_size_limit: %s", expand_string_message);
5227 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5228 "message_size_limit: %s", expand_string_message);
5232 /* Loop for several messages when reading SMTP input. If we fork any child
5233 processes, we don't want to wait for them unless synchronous delivery is
5234 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5235 same as SIG_DFL, despite the fact that documentation often lists the default as
5236 "ignore". This is a confusing area. This is what I know:
5238 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5239 processes that complete simply to go away without ever becoming defunct. You
5240 can't then wait for them - but we don't want to wait for them in the
5241 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5242 happen for all OS (e.g. *BSD is different).
5244 But that's not the end of the story. Some (many? all?) systems have the
5245 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5246 has by default, so it seems that the difference is merely one of default
5247 (compare restarting vs non-restarting signals).
5249 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5250 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5251 of the loop below. Paranoia rules.
5253 February 2003: That's *still* not the end of the story. There are now versions
5254 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5255 process then calls waitpid(), a grumble is written to the system log, because
5256 this is logically inconsistent. In other words, it doesn't like the paranoia.
5257 As a consequenc of this, the waitpid() below is now excluded if we are sure
5258 that SIG_IGN works. */
5260 if (!synchronous_delivery)
5263 struct sigaction act;
5264 act.sa_handler = SIG_IGN;
5265 sigemptyset(&(act.sa_mask));
5266 act.sa_flags = SA_NOCLDWAIT;
5267 sigaction(SIGCHLD, &act, NULL);
5269 signal(SIGCHLD, SIG_IGN);
5273 /* Save the current store pool point, for resetting at the start of
5274 each message, and save the real sender address, if any. */
5276 reset_point = store_get(0);
5277 real_sender_address = sender_address;
5279 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5280 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5285 store_reset(reset_point);
5288 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5289 input and build the recipients list, before calling receive_msg() to read the
5290 message proper. Whatever sender address is given in the SMTP transaction is
5291 often ignored for local senders - we use the actual sender, which is normally
5292 either the underlying user running this process or a -f argument provided by
5293 a trusted caller. It is saved in real_sender_address. The test for whether to
5294 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5299 if ((rc = smtp_setup_msg()) > 0)
5301 if (real_sender_address != NULL &&
5302 !receive_check_set_sender(sender_address))
5304 sender_address = raw_sender = real_sender_address;
5305 sender_address_unrewritten = NULL;
5308 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5309 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5310 the very end. The result of the ACL is ignored (as for other non-SMTP
5311 messages). It is run for its potential side effects. */
5313 if (smtp_batched_input && acl_not_smtp_start != NULL)
5315 uschar *user_msg, *log_msg;
5316 enable_dollar_recipients = TRUE;
5317 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5318 &user_msg, &log_msg);
5319 enable_dollar_recipients = FALSE;
5322 /* Now get the data for the message */
5324 more = receive_msg(extract_recipients);
5325 if (message_id[0] == 0)
5328 smtp_log_no_mail(); /* Log no mail if configured */
5329 exim_exit(EXIT_FAILURE);
5334 smtp_log_no_mail(); /* Log no mail if configured */
5335 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
5339 /* In the non-SMTP case, we have all the information from the command
5340 line, but must process it in case it is in the more general RFC822
5341 format, and in any case, to detect syntax errors. Also, it appears that
5342 the use of comma-separated lists as single arguments is common, so we
5343 had better support them. */
5349 int count = argc - recipients_arg;
5350 uschar **list = argv + recipients_arg;
5352 /* These options cannot be changed dynamically for non-SMTP messages */
5354 active_local_sender_retain = local_sender_retain;
5355 active_local_from_check = local_from_check;
5357 /* Save before any rewriting */
5359 raw_sender = string_copy(sender_address);
5361 /* Loop for each argument */
5363 for (i = 0; i < count; i++)
5365 int start, end, domain;
5367 uschar *s = list[i];
5369 /* Loop for each comma-separated address */
5373 BOOL finished = FALSE;
5375 uschar *ss = parse_find_address_end(s, FALSE);
5377 if (*ss == ',') *ss = 0; else finished = TRUE;
5379 /* Check max recipients - if -t was used, these aren't recipients */
5381 if (recipients_max > 0 && ++rcount > recipients_max &&
5382 !extract_recipients)
5383 if (error_handling == ERRORS_STDERR)
5385 fprintf(stderr, "exim: too many recipients\n");
5386 exim_exit(EXIT_FAILURE);
5391 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5392 errors_sender_rc : EXIT_FAILURE;
5395 #ifdef EXPERIMENTAL_INTERNATIONAL
5397 BOOL b = allow_utf8_domains;
5398 allow_utf8_domains = TRUE;
5401 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5403 #ifdef EXPERIMENTAL_INTERNATIONAL
5404 if (string_is_utf8(recipient))
5405 message_smtputf8 = TRUE;
5407 allow_utf8_domains = b;
5410 if (domain == 0 && !allow_unqualified_recipient)
5413 errmess = US"unqualified recipient address not allowed";
5416 if (recipient == NULL)
5418 if (error_handling == ERRORS_STDERR)
5420 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5421 string_printing(list[i]), errmess);
5422 exim_exit(EXIT_FAILURE);
5428 eblock.text1 = string_printing(list[i]);
5429 eblock.text2 = errmess;
5431 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5432 errors_sender_rc : EXIT_FAILURE;
5436 receive_add_recipient(recipient, -1);
5439 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5443 /* Show the recipients when debugging */
5448 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
5449 if (recipients_list != NULL)
5451 debug_printf("Recipients:\n");
5452 for (i = 0; i < recipients_count; i++)
5453 debug_printf(" %s\n", recipients_list[i].address);
5457 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5458 ignored; rejecting here would just add complication, and it can just as
5459 well be done later. Allow $recipients to be visible in the ACL. */
5461 if (acl_not_smtp_start != NULL)
5463 uschar *user_msg, *log_msg;
5464 enable_dollar_recipients = TRUE;
5465 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5466 &user_msg, &log_msg);
5467 enable_dollar_recipients = FALSE;
5470 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5471 will just read the headers for the message, and not write anything onto the
5474 message_ended = END_NOTENDED;
5475 more = receive_msg(extract_recipients);
5477 /* more is always FALSE here (not SMTP message) when reading a message
5478 for real; when reading the headers of a message for filter testing,
5479 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5481 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5482 } /* Non-SMTP message reception */
5484 /* If this is a filter testing run, there are headers in store, but
5485 no message on the spool. Run the filtering code in testing mode, setting
5486 the domain to the qualify domain and the local part to the current user,
5487 unless they have been set by options. The prefix and suffix are left unset
5488 unless specified. The the return path is set to to the sender unless it has
5489 already been set from a return-path header in the message. */
5491 if (filter_test != FTEST_NONE)
5493 deliver_domain = (ftest_domain != NULL)?
5494 ftest_domain : qualify_domain_recipient;
5495 deliver_domain_orig = deliver_domain;
5496 deliver_localpart = (ftest_localpart != NULL)?
5497 ftest_localpart : originator_login;
5498 deliver_localpart_orig = deliver_localpart;
5499 deliver_localpart_prefix = ftest_prefix;
5500 deliver_localpart_suffix = ftest_suffix;
5501 deliver_home = originator_home;
5503 if (return_path == NULL)
5505 printf("Return-path copied from sender\n");
5506 return_path = string_copy(sender_address);
5509 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5510 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5512 receive_add_recipient(
5513 string_sprintf("%s%s%s@%s",
5514 (ftest_prefix == NULL)? US"" : ftest_prefix,
5516 (ftest_suffix == NULL)? US"" : ftest_suffix,
5517 deliver_domain), -1);
5519 printf("Recipient = %s\n", recipients_list[0].address);
5520 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5521 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5523 if (chdir("/")) /* Get away from wherever the user is running this from */
5525 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5526 exim_exit(EXIT_FAILURE);
5529 /* Now we run either a system filter test, or a user filter test, or both.
5530 In the latter case, headers added by the system filter will persist and be
5531 available to the user filter. We need to copy the filter variables
5534 if ((filter_test & FTEST_SYSTEM) != 0)
5536 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5537 exim_exit(EXIT_FAILURE);
5540 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5542 if ((filter_test & FTEST_USER) != 0)
5544 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5545 exim_exit(EXIT_FAILURE);
5548 exim_exit(EXIT_SUCCESS);
5551 /* Else act on the result of message reception. We should not get here unless
5552 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5553 will be TRUE. If it is not, check on the number of messages received in this
5556 if (!session_local_queue_only &&
5557 smtp_accept_queue_per_connection > 0 &&
5558 receive_messagecount > smtp_accept_queue_per_connection)
5560 session_local_queue_only = TRUE;
5561 queue_only_reason = 2;
5564 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5565 and queue_only_load is set, check that the load average is below it. If it is
5566 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5567 default), we put the whole session into queue_only mode. It then remains this
5568 way for any subsequent messages on the same SMTP connection. This is a
5569 deliberate choice; even though the load average may fall, it doesn't seem
5570 right to deliver later messages on the same call when not delivering earlier
5571 ones. However, there are odd cases where this is not wanted, so this can be
5572 changed by setting queue_only_load_latch false. */
5574 local_queue_only = session_local_queue_only;
5575 if (!local_queue_only && queue_only_load >= 0)
5577 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5578 if (local_queue_only)
5580 queue_only_reason = 3;
5581 if (queue_only_load_latch) session_local_queue_only = TRUE;
5585 /* If running as an MUA wrapper, all queueing options and freezing options
5589 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
5591 /* Log the queueing here, when it will get a message id attached, but
5592 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5595 if (local_queue_only) switch(queue_only_reason)
5598 log_write(L_delay_delivery,
5599 LOG_MAIN, "no immediate delivery: more than %d messages "
5600 "received in one connection", smtp_accept_queue_per_connection);
5604 log_write(L_delay_delivery,
5605 LOG_MAIN, "no immediate delivery: load average %.2f",
5606 (double)load_average/1000.0);
5610 /* Else do the delivery unless the ACL or local_scan() called for queue only
5611 or froze the message. Always deliver in a separate process. A fork failure is
5612 not a disaster, as the delivery will eventually happen on a subsequent queue
5613 run. The search cache must be tidied before the fork, as the parent will
5614 do it before exiting. The child will trigger a lookup failure and
5615 thereby defer the delivery if it tries to use (for example) a cached ldap
5616 connection that the parent has called unbind on. */
5618 else if (!queue_only_policy && !deliver_freeze)
5623 if ((pid = fork()) == 0)
5626 close_unwanted(); /* Close unwanted file descriptors and TLS */
5627 exim_nullstd(); /* Ensure std{in,out,err} exist */
5629 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5630 mode, deliver_drop_privilege is forced TRUE). */
5632 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5634 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
5636 /* Control does not return here. */
5639 /* No need to re-exec */
5641 rc = deliver_message(message_id, FALSE, FALSE);
5643 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
5644 EXIT_SUCCESS : EXIT_FAILURE);
5649 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5650 "process: %s", strerror(errno));
5653 /* In the parent, wait if synchronous delivery is required. This will
5654 always be the case in MUA wrapper mode. */
5656 else if (synchronous_delivery)
5659 while (wait(&status) != pid);
5660 if ((status & 0x00ff) != 0)
5661 log_write(0, LOG_MAIN|LOG_PANIC,
5662 "process %d crashed with signal %d while delivering %s",
5663 (int)pid, status & 0x00ff, message_id);
5664 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5668 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5669 automatically reaps children (see comments above the loop), clear away any
5670 finished subprocesses here, in case there are lots of messages coming in
5671 from the same source. */
5673 #ifndef SIG_IGN_WORKS
5674 while (waitpid(-1, NULL, WNOHANG) > 0);
5678 exim_exit(EXIT_SUCCESS); /* Never returns */
5679 return 0; /* To stop compiler warning */