1 /* $Cambridge: exim/src/src/exim.c,v 1.55 2007/01/30 15:10:59 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2007 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size)
34 return store_get((int)size);
38 function_dummy_free(void *block) { block = block; }
41 function_store_malloc(size_t size)
43 return store_malloc((int)size);
47 function_store_free(void *block)
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar *pattern, BOOL caseless, BOOL use_malloc)
77 int options = PCRE_COPT;
82 pcre_malloc = function_store_malloc;
83 pcre_free = function_store_free;
85 if (caseless) options |= PCRE_CASELESS;
86 yield = pcre_compile(CS pattern, options, (const char **)&error, &offset, NULL);
87 pcre_malloc = function_store_get;
88 pcre_free = function_dummy_free;
90 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
91 "%s at offset %d while compiling %s", error, offset, pattern);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre *re, uschar *subject, int options, int setup)
119 int ovector[3*(EXPAND_MAXN+1)];
120 int n = pcre_exec(re, NULL, CS subject, Ustrlen(subject), 0,
121 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
123 if (n == 0) n = EXPAND_MAXN + 1;
127 expand_nmax = (setup < 0)? 0 : setup + 1;
128 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
130 expand_nstring[expand_nmax] = subject + ovector[nn];
131 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
150 Argument: the signal number (SIGUSR1)
155 usr1_handler(int sig)
157 sig = sig; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS, "%s", process_info);
160 os_restarting_signal(SIGUSR1, usr1_handler);
165 /*************************************************
167 *************************************************/
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
179 Argument: the signal value (SIGALRM)
184 sigalrm_handler(int sig)
186 sig = sig; /* Keep picky compilers happy */
188 os_non_restarting_signal(SIGALRM, sigalrm_handler);
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
204 Argument: an itimerval structure containing the interval
209 milliwait(struct itimerval *itval)
212 sigset_t old_sigmask;
213 (void)sigemptyset(&sigmask); /* Empty mask */
214 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
217 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
218 "setitimer() failed: %s", strerror(errno));
219 (void)sigfillset(&sigmask); /* All signals */
220 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
236 Argument: number of millseconds
243 struct itimerval itval;
244 itval.it_interval.tv_sec = 0;
245 itval.it_interval.tv_usec = 0;
246 itval.it_value.tv_sec = msec/1000;
247 itval.it_value.tv_usec = (msec % 1000) * 1000;
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
262 Returns: -1, 0, or +1
266 exim_tvcmp(struct timeval *t1, struct timeval *t2)
268 if (t1->tv_sec > t2->tv_sec) return +1;
269 if (t1->tv_sec < t2->tv_sec) return -1;
270 if (t1->tv_usec > t2->tv_usec) return +1;
271 if (t1->tv_usec < t2->tv_usec) return -1;
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
303 exim_wait_tick(struct timeval *then_tv, int resolution)
305 struct timeval now_tv;
306 long int now_true_usec;
308 (void)gettimeofday(&now_tv, NULL);
309 now_true_usec = now_tv.tv_usec;
310 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
312 if (exim_tvcmp(&now_tv, then_tv) <= 0)
314 struct itimerval itval;
315 itval.it_interval.tv_sec = 0;
316 itval.it_interval.tv_usec = 0;
317 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
318 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
325 if (itval.it_value.tv_usec < 0)
327 itval.it_value.tv_usec += 1000000;
328 itval.it_value.tv_sec -= 1;
331 DEBUG(D_transport|D_receive)
333 if (!running_in_test_harness)
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv->tv_sec, then_tv->tv_usec, now_tv.tv_sec, now_tv.tv_usec);
337 debug_printf("waiting %lu.%06lu\n", itval.it_value.tv_sec,
338 itval.it_value.tv_usec);
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
356 Arguments: format and arguments, as for printf()
361 set_process_info(char *format, ...)
365 sprintf(CS process_info, "%5d ", (int)getpid());
366 len = Ustrlen(process_info);
367 va_start(ap, format);
368 if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len, format, ap))
369 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
370 DEBUG(D_process_info) debug_printf("set_process_info: %s\n", process_info);
378 /*************************************************
379 * Call fopen() with umask 777 and adjust mode *
380 *************************************************/
382 /* Exim runs with umask(0) so that files created with open() have the mode that
383 is specified in the open() call. However, there are some files, typically in
384 the spool directory, that are created with fopen(). They end up world-writeable
385 if no precautions are taken. Although the spool directory is not accessible to
386 the world, this is an untidiness. So this is a wrapper function for fopen()
387 that sorts out the mode of the created file.
390 filename the file name
391 options the fopen() options
392 mode the required mode
394 Returns: the fopened FILE or NULL
398 modefopen(uschar *filename, char *options, mode_t mode)
400 mode_t saved_umask = umask(0777);
401 FILE *f = Ufopen(filename, options);
402 (void)umask(saved_umask);
403 if (f != NULL) (void)fchmod(fileno(f), mode);
410 /*************************************************
411 * Ensure stdin, stdout, and stderr exist *
412 *************************************************/
414 /* Some operating systems grumble if an exec() happens without a standard
415 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
416 file will be opened and will use these fd values, and then some other bit of
417 code will assume, for example, that it can write error messages to stderr.
418 This function ensures that fds 0, 1, and 2 are open if they do not already
419 exist, by connecting them to /dev/null.
421 This function is also used to ensure that std{in,out,err} exist at all times,
422 so that if any library that Exim calls tries to use them, it doesn't crash.
434 for (i = 0; i <= 2; i++)
436 if (fstat(i, &statbuf) < 0 && errno == EBADF)
438 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
439 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
440 string_open_failed(errno, "/dev/null"));
441 if (devnull != i) (void)dup2(devnull, i);
444 if (devnull > 2) (void)close(devnull);
450 /*************************************************
451 * Close unwanted file descriptors for delivery *
452 *************************************************/
454 /* This function is called from a new process that has been forked to deliver
455 an incoming message, either directly, or using exec.
457 We want any smtp input streams to be closed in this new process. However, it
458 has been observed that using fclose() here causes trouble. When reading in -bS
459 input, duplicate copies of messages have been seen. The files will be sharing a
460 file pointer with the parent process, and it seems that fclose() (at least on
461 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
462 least sometimes. Hence we go for closing the underlying file descriptors.
464 If TLS is active, we want to shut down the TLS library, but without molesting
465 the parent's SSL connection.
467 For delivery of a non-SMTP message, we want to close stdin and stdout (and
468 stderr unless debugging) because the calling process might have set them up as
469 pipes and be waiting for them to close before it waits for the submission
470 process to terminate. If they aren't closed, they hold up the calling process
471 until the initial delivery process finishes, which is not what we want.
473 Exception: We do want it for synchronous delivery!
475 And notwithstanding all the above, if D_resolver is set, implying resolver
476 debugging, leave stdout open, because that's where the resolver writes its
479 When we close stderr (which implies we've also closed stdout), we also get rid
480 of any controlling terminal.
492 tls_close(FALSE); /* Shut down the TLS library */
494 (void)close(fileno(smtp_in));
495 (void)close(fileno(smtp_out));
500 (void)close(0); /* stdin */
501 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
502 if (debug_selector == 0) /* stderr */
504 if (!synchronous_delivery)
517 /*************************************************
519 *************************************************/
521 /* This function sets a new uid and gid permanently, optionally calling
522 initgroups() to set auxiliary groups. There are some special cases when running
523 Exim in unprivileged modes. In these situations the effective uid will not be
524 root; if we already have the right effective uid/gid, and don't need to
525 initialize any groups, leave things as they are.
530 igflag TRUE if initgroups() wanted
531 msg text to use in debugging output and failure log
533 Returns: nothing; bombs out on failure
537 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
539 uid_t euid = geteuid();
540 gid_t egid = getegid();
542 if (euid == root_uid || euid != uid || egid != gid || igflag)
544 /* At least one OS returns +1 for initgroups failure, so just check for
549 struct passwd *pw = getpwuid(uid);
552 if (initgroups(pw->pw_name, gid) != 0)
553 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
554 (long int)uid, strerror(errno));
556 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
557 "no passwd entry for uid=%ld", (long int)uid);
560 if (setgid(gid) < 0 || setuid(uid) < 0)
562 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
563 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
567 /* Debugging output included uid/gid and all groups */
572 gid_t group_list[NGROUPS_MAX];
573 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
574 (long int)geteuid(), (long int)getegid(), (long int)getpid());
575 group_count = getgroups(NGROUPS_MAX, group_list);
576 debug_printf(" auxiliary group list:");
580 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
582 else debug_printf(" <none>");
590 /*************************************************
592 *************************************************/
594 /* Exim exits via this function so that it always clears up any open
600 Returns: does not return
608 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
609 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
616 /*************************************************
617 * Extract port from host address *
618 *************************************************/
620 /* Called to extract the port from the values given to -oMa and -oMi.
621 It also checks the syntax of the address, and terminates it before the
622 port data when a port is extracted.
625 address the address, with possible port on the end
627 Returns: the port, or zero if there isn't one
628 bombs out on a syntax error
632 check_port(uschar *address)
634 int port = host_address_extract_port(address);
635 if (string_is_ip_address(address, NULL) == 0)
637 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
645 /*************************************************
646 * Test/verify an address *
647 *************************************************/
649 /* This function is called by the -bv and -bt code. It extracts a working
650 address from a full RFC 822 address. This isn't really necessary per se, but it
651 has the effect of collapsing source routes.
655 flags flag bits for verify_address()
656 exit_value to be set for failures
662 test_address(uschar *s, int flags, int *exit_value)
664 int start, end, domain;
665 uschar *parse_error = NULL;
666 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
670 fprintf(stdout, "syntax error: %s\n", parse_error);
675 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
676 -1, -1, NULL, NULL, NULL);
677 if (rc == FAIL) *exit_value = 2;
678 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
684 /*************************************************
685 * Decode bit settings for log/debug *
686 *************************************************/
688 /* This function decodes a string containing bit settings in the form of +name
689 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
690 also recognizes a numeric setting of the form =<number>, but this is not
691 intended for user use. It's an easy way for Exim to pass the debug settings
692 when it is re-exec'ed.
694 The log options are held in two unsigned ints (because there became too many
695 for one). The top bit in the table means "put in 2nd selector". This does not
696 yet apply to debug options, so the "=" facility sets only the first selector.
698 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
699 It sets all the bits in both selectors. However, there is a facility for then
700 unsetting certain bits, because we want to turn off "memory" in the debug case.
702 A bad value for a debug setting is treated as an unknown option - error message
703 to stderr and die. For log settings, which come from the configuration file,
704 we write to the log on the way out...
707 selector1 address of the first bit string
708 selector2 address of the second bit string, or NULL
709 notall1 bits to exclude from "all" for selector1
710 notall2 bits to exclude from "all" for selector2
711 string the configured string
712 options the table of option names
714 which "log" or "debug"
716 Returns: nothing on success - bomb out on failure
720 decode_bits(unsigned int *selector1, unsigned int *selector2, int notall1,
721 int notall2, uschar *string, bit_table *options, int count, uschar *which)
724 if (string == NULL) return;
728 char *end; /* Not uschar */
729 *selector1 = strtoul(CS string+1, &end, 0);
730 if (*end == 0) return;
731 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
736 /* Handle symbolic setting */
743 bit_table *start, *end;
745 while (isspace(*string)) string++;
746 if (*string == 0) return;
748 if (*string != '+' && *string != '-')
750 errmsg = string_sprintf("malformed %s_selector setting: "
751 "+ or - expected but found \"%s\"", which, string);
755 adding = *string++ == '+';
757 while (isalnum(*string) || *string == '_') string++;
761 end = options + count;
765 bit_table *middle = start + (end - start)/2;
766 int c = Ustrncmp(s, middle->name, len);
769 if (middle->name[len] != 0) c = -1; else
771 unsigned int bit = middle->bit;
772 unsigned int *selector;
774 /* The value with all bits set means "force all bits in both selectors"
775 in the case where two are being handled. However, the top bit in the
776 second selector is never set. When setting, some bits can be excluded.
779 if (bit == 0xffffffff)
783 *selector1 = 0xffffffff ^ notall1;
784 if (selector2 != NULL) *selector2 = 0x7fffffff ^ notall2;
789 if (selector2 != NULL) *selector2 = 0;
793 /* Otherwise, the 0x80000000 bit means "this value, without the top
794 bit, belongs in the second selector". */
798 if ((bit & 0x80000000) != 0)
800 selector = selector2;
803 else selector = selector1;
804 if (adding) *selector |= bit; else *selector &= ~bit;
806 break; /* Out of loop to match selector name */
809 if (c < 0) end = middle; else start = middle + 1;
810 } /* Loop to match selector name */
814 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
815 adding? '+' : '-', len, s);
818 } /* Loop for selector names */
820 /* Handle disasters */
823 if (Ustrcmp(which, "debug") == 0)
825 fprintf(stderr, "exim: %s\n", errmsg);
828 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
833 /*************************************************
834 * Show supported features *
835 *************************************************/
837 /* This function is called for -bV and for -d to output the optional features
838 of the current Exim binary.
840 Arguments: a FILE for printing
845 show_whats_supported(FILE *f)
847 #ifdef DB_VERSION_STRING
848 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
849 #elif defined(BTREEVERSION) && defined(HASHVERSION)
851 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
853 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
855 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
856 fprintf(f, "Probably ndbm\n");
857 #elif defined(USE_TDB)
858 fprintf(f, "Using tdb\n");
861 fprintf(f, "Probably GDBM (native mode)\n");
863 fprintf(f, "Probably GDBM (compatibility mode)\n");
867 fprintf(f, "Support for:");
868 #ifdef SUPPORT_CRYPTEQ
869 fprintf(f, " crypteq");
872 fprintf(f, " iconv()");
877 #ifdef HAVE_SETCLASSRESOURCES
878 fprintf(f, " use_setclassresources");
887 fprintf(f, " Expand_dlfunc");
889 #ifdef USE_TCP_WRAPPERS
890 fprintf(f, " TCPwrappers");
894 fprintf(f, " GnuTLS");
896 fprintf(f, " OpenSSL");
899 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
900 fprintf(f, " translate_ip_address");
902 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
903 fprintf(f, " move_frozen_messages");
905 #ifdef WITH_CONTENT_SCAN
906 fprintf(f, " Content_Scanning");
908 #ifdef WITH_OLD_DEMIME
909 fprintf(f, " Old_Demime");
911 #ifdef EXPERIMENTAL_SPF
912 fprintf(f, " Experimental_SPF");
914 #ifdef EXPERIMENTAL_SRS
915 fprintf(f, " Experimental_SRS");
917 #ifdef EXPERIMENTAL_BRIGHTMAIL
918 fprintf(f, " Experimental_Brightmail");
920 #ifdef EXPERIMENTAL_DOMAINKEYS
921 fprintf(f, " Experimental_DomainKeys");
925 fprintf(f, "Lookups:");
926 #ifdef LOOKUP_LSEARCH
927 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
933 fprintf(f, " dbm dbmnz");
936 fprintf(f, " dnsdb");
938 #ifdef LOOKUP_DSEARCH
939 fprintf(f, " dsearch");
942 fprintf(f, " ibase");
945 fprintf(f, " ldap ldapdn ldapm");
948 fprintf(f, " mysql");
951 fprintf(f, " nis nis0");
953 #ifdef LOOKUP_NISPLUS
954 fprintf(f, " nisplus");
957 fprintf(f, " oracle");
960 fprintf(f, " passwd");
963 fprintf(f, " pgsql");
966 fprintf(f, " sqlite");
969 fprintf(f, " testdb");
972 fprintf(f, " whoson");
976 fprintf(f, "Authenticators:");
978 fprintf(f, " cram_md5");
980 #ifdef AUTH_CYRUS_SASL
981 fprintf(f, " cyrus_sasl");
984 fprintf(f, " dovecot");
986 #ifdef AUTH_PLAINTEXT
987 fprintf(f, " plaintext");
994 fprintf(f, "Routers:");
996 fprintf(f, " accept");
998 #ifdef ROUTER_DNSLOOKUP
999 fprintf(f, " dnslookup");
1001 #ifdef ROUTER_IPLITERAL
1002 fprintf(f, " ipliteral");
1004 #ifdef ROUTER_IPLOOKUP
1005 fprintf(f, " iplookup");
1007 #ifdef ROUTER_MANUALROUTE
1008 fprintf(f, " manualroute");
1010 #ifdef ROUTER_QUERYPROGRAM
1011 fprintf(f, " queryprogram");
1013 #ifdef ROUTER_REDIRECT
1014 fprintf(f, " redirect");
1018 fprintf(f, "Transports:");
1019 #ifdef TRANSPORT_APPENDFILE
1020 fprintf(f, " appendfile");
1021 #ifdef SUPPORT_MAILDIR
1022 fprintf(f, "/maildir");
1024 #ifdef SUPPORT_MAILSTORE
1025 fprintf(f, "/mailstore");
1031 #ifdef TRANSPORT_AUTOREPLY
1032 fprintf(f, " autoreply");
1034 #ifdef TRANSPORT_LMTP
1035 fprintf(f, " lmtp");
1037 #ifdef TRANSPORT_PIPE
1038 fprintf(f, " pipe");
1040 #ifdef TRANSPORT_SMTP
1041 fprintf(f, " smtp");
1045 if (fixed_never_users[0] > 0)
1048 fprintf(f, "Fixed never_users: ");
1049 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1050 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1051 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1054 fprintf(f, "Size of off_t: %d\n", sizeof(off_t));
1060 /*************************************************
1061 * Quote a local part *
1062 *************************************************/
1064 /* This function is used when a sender address or a From: or Sender: header
1065 line is being created from the caller's login, or from an authenticated_id. It
1066 applies appropriate quoting rules for a local part.
1068 Argument: the local part
1069 Returns: the local part, quoted if necessary
1073 local_part_quote(uschar *lpart)
1075 BOOL needs_quote = FALSE;
1080 for (t = lpart; !needs_quote && *t != 0; t++)
1082 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1083 (*t != '.' || t == lpart || t[1] == 0);
1086 if (!needs_quote) return lpart;
1089 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1093 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1096 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1099 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1100 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1101 yield = string_cat(yield, &size, &ptr, nq, 1);
1105 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1113 /*************************************************
1114 * Load readline() functions *
1115 *************************************************/
1117 /* This function is called from testing executions that read data from stdin,
1118 but only when running as the calling user. Currently, only -be does this. The
1119 function loads the readline() function library and passes back the functions.
1120 On some systems, it needs the curses library, so load that too, but try without
1121 it if loading fails. All this functionality has to be requested at build time.
1124 fn_readline_ptr pointer to where to put the readline pointer
1125 fn_addhist_ptr pointer to where to put the addhistory function
1127 Returns: the dlopen handle or NULL on failure
1131 set_readline(char * (**fn_readline_ptr)(char *),
1132 char * (**fn_addhist_ptr)(char *))
1135 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1137 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1138 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1140 if (dlhandle != NULL)
1142 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1143 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1147 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1156 /*************************************************
1157 * Get a line from stdin for testing things *
1158 *************************************************/
1160 /* This function is called when running tests that can take a number of lines
1161 of input (for example, -be and -bt). It handles continuations and trailing
1162 spaces. And prompting and a blank line output on eof. If readline() is in use,
1163 the arguments are non-NULL and provide the relevant functions.
1166 fn_readline readline function or NULL
1167 fn_addhist addhist function or NULL
1169 Returns: pointer to dynamic memory, or NULL at end of file
1173 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1178 uschar *yield = NULL;
1180 if (fn_readline == NULL) { printf("> "); fflush(stdout); }
1184 uschar buffer[1024];
1188 char *readline_line = NULL;
1189 if (fn_readline != NULL)
1191 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1192 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1193 p = US readline_line;
1198 /* readline() not in use */
1201 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1205 /* Handle the line */
1207 ss = p + (int)Ustrlen(p);
1208 while (ss > p && isspace(ss[-1])) ss--;
1212 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1215 yield = string_cat(yield, &size, &ptr, p, ss - p);
1218 if (fn_readline != NULL) free(readline_line);
1221 if (ss == p || yield[ptr-1] != '\\')
1229 if (yield == NULL) printf("\n");
1235 /*************************************************
1236 * Entry point and high-level code *
1237 *************************************************/
1239 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1240 the appropriate action. All the necessary functions are present in the one
1241 binary. I originally thought one should split it up, but it turns out that so
1242 much of the apparatus is needed in each chunk that one might as well just have
1243 it all available all the time, which then makes the coding easier as well.
1246 argc count of entries in argv
1247 argv argument strings, with argv[0] being the program name
1249 Returns: EXIT_SUCCESS if terminated successfully
1250 EXIT_FAILURE otherwise, except when a message has been sent
1251 to the sender, and -oee was given
1255 main(int argc, char **cargv)
1257 uschar **argv = USS cargv;
1258 int arg_receive_timeout = -1;
1259 int arg_smtp_receive_timeout = -1;
1260 int arg_error_handling = error_handling;
1261 int filter_sfd = -1;
1262 int filter_ufd = -1;
1265 int list_queue_option = 0;
1267 int msg_action_arg = -1;
1268 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1269 int queue_only_reason = 0;
1271 int perl_start_option = 0;
1273 int recipients_arg = argc;
1274 int sender_address_domain = 0;
1275 int test_retry_arg = -1;
1276 int test_rewrite_arg = -1;
1277 BOOL arg_queue_only = FALSE;
1278 BOOL bi_option = FALSE;
1279 BOOL checking = FALSE;
1280 BOOL count_queue = FALSE;
1281 BOOL expansion_test = FALSE;
1282 BOOL extract_recipients = FALSE;
1283 BOOL forced_delivery = FALSE;
1284 BOOL f_end_dot = FALSE;
1285 BOOL deliver_give_up = FALSE;
1286 BOOL list_queue = FALSE;
1287 BOOL list_options = FALSE;
1288 BOOL local_queue_only;
1290 BOOL one_msg_action = FALSE;
1291 BOOL queue_only_set = FALSE;
1292 BOOL receiving_message = TRUE;
1293 BOOL sender_ident_set = FALSE;
1295 BOOL removed_privilege = FALSE;
1296 BOOL verify_address_mode = FALSE;
1297 BOOL verify_as_sender = FALSE;
1298 BOOL version_printed = FALSE;
1299 uschar *alias_arg = NULL;
1300 uschar *called_as = US"";
1301 uschar *start_queue_run_id = NULL;
1302 uschar *stop_queue_run_id = NULL;
1303 uschar *expansion_test_message = NULL;
1304 uschar *ftest_domain = NULL;
1305 uschar *ftest_localpart = NULL;
1306 uschar *ftest_prefix = NULL;
1307 uschar *ftest_suffix = NULL;
1308 uschar *real_sender_address;
1309 uschar *originator_home = US"/";
1313 struct stat statbuf;
1314 pid_t passed_qr_pid = (pid_t)0;
1315 int passed_qr_pipe = -1;
1316 gid_t group_list[NGROUPS_MAX];
1318 /* Possible options for -R and -S */
1320 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1322 /* Need to define this in case we need to change the environment in order
1323 to get rid of a bogus time zone. We have to make it char rather than uschar
1324 because some OS define it in /usr/include/unistd.h. */
1326 extern char **environ;
1328 /* If the Exim user and/or group and/or the configuration file owner/group were
1329 defined by ref:name at build time, we must now find the actual uid/gid values.
1330 This is a feature to make the lives of binary distributors easier. */
1332 #ifdef EXIM_USERNAME
1333 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1335 exim_gid = pw->pw_gid;
1339 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1345 #ifdef EXIM_GROUPNAME
1346 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1348 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1354 #ifdef CONFIGURE_OWNERNAME
1355 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1357 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1358 CONFIGURE_OWNERNAME);
1363 #ifdef CONFIGURE_GROUPNAME
1364 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1366 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1367 CONFIGURE_GROUPNAME);
1372 /* In the Cygwin environment, some initialization needs doing. It is fudged
1373 in by means of this macro. */
1379 /* Check a field which is patched when we are running Exim within its
1380 testing harness; do a fast initial check, and then the whole thing. */
1382 running_in_test_harness =
1383 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1385 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1386 at the start of a program; however, it seems that some environments do not
1387 follow this. A "strange" locale can affect the formatting of timestamps, so we
1390 setlocale(LC_ALL, "C");
1392 /* Set up the default handler for timing using alarm(). */
1394 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1396 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1397 because store_malloc writes a log entry on failure. */
1399 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1400 if (log_buffer == NULL)
1402 fprintf(stderr, "exim: failed to get store for log buffer\n");
1406 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1407 NULL when the daemon is run and the file is closed. We have to use this
1408 indirection, because some systems don't allow writing to the variable "stderr".
1411 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1413 /* Arrange for the PCRE regex library to use our store functions. Note that
1414 the normal calls are actually macros that add additional arguments for
1415 debugging purposes so we have to assign specially constructed functions here.
1416 The default is to use store in the stacking pool, but this is overridden in the
1417 regex_must_compile() function. */
1419 pcre_malloc = function_store_get;
1420 pcre_free = function_dummy_free;
1422 /* Ensure there is a big buffer for temporary use in several places. It is put
1423 in malloc store so that it can be freed for enlargement if necessary. */
1425 big_buffer = store_malloc(big_buffer_size);
1427 /* Set up the handler for the data request signal, and set the initial
1428 descriptive text. */
1430 set_process_info("initializing");
1431 os_restarting_signal(SIGUSR1, usr1_handler);
1433 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1434 in the daemon code. For the rest of Exim's uses, we ignore it. */
1436 signal(SIGHUP, SIG_IGN);
1438 /* We don't want to die on pipe errors as the code is written to handle
1439 the write error instead. */
1441 signal(SIGPIPE, SIG_IGN);
1443 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1444 set to SIG_IGN. This causes subprocesses that complete before the parent
1445 process waits for them not to hang around, so when Exim calls wait(), nothing
1446 is there. The wait() code has been made robust against this, but let's ensure
1447 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1448 ending status. We use sigaction rather than plain signal() on those OS where
1449 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1450 problem on AIX with this.) */
1454 struct sigaction act;
1455 act.sa_handler = SIG_DFL;
1456 sigemptyset(&(act.sa_mask));
1458 sigaction(SIGCHLD, &act, NULL);
1461 signal(SIGCHLD, SIG_DFL);
1464 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1469 /* Set up the version number. Set up the leading 'E' for the external form of
1470 message ids, set the pointer to the internal form, and initialize it to
1471 indicate no message being processed. */
1474 message_id_option[0] = '-';
1475 message_id_external = message_id_option + 1;
1476 message_id_external[0] = 'E';
1477 message_id = message_id_external + 1;
1480 /* Set the umask to zero so that any files Exim creates using open() are
1481 created with the modes that it specifies. NOTE: Files created with fopen() have
1482 a problem, which was not recognized till rather late (February 2006). With this
1483 umask, such files will be world writeable. (They are all content scanning files
1484 in the spool directory, which isn't world-accessible, so this is not a
1485 disaster, but it's untidy.) I don't want to change this overall setting,
1486 however, because it will interact badly with the open() calls. Instead, there's
1487 now a function called modefopen() that fiddles with the umask while calling
1492 /* Precompile the regular expression for matching a message id. Keep this in
1493 step with the code that generates ids in the accept.c module. We need to do
1494 this here, because the -M options check their arguments for syntactic validity
1495 using mac_ismsgid, which uses this. */
1498 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1500 /* Precompile the regular expression that is used for matching an SMTP error
1501 code, possibly extended, at the start of an error message. Note that the
1502 terminating whitespace character is included. */
1505 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1508 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1509 this seems to be a generally accepted convention, since one finds symbolic
1510 links called "mailq" in standard OS configurations. */
1512 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1513 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1516 receiving_message = FALSE;
1517 called_as = US"-mailq";
1520 /* If the program is called as "rmail" treat it as equivalent to
1521 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1522 i.e. preventing a single dot on a line from terminating the message, and
1523 returning with zero return code, even in cases of error (provided an error
1524 message has been sent). */
1526 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1527 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1530 called_as = US"-rmail";
1531 errors_sender_rc = EXIT_SUCCESS;
1534 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1535 this is a smail convention. */
1537 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1538 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1540 smtp_input = smtp_batched_input = TRUE;
1541 called_as = US"-rsmtp";
1544 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1545 this is a smail convention. */
1547 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1548 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1551 receiving_message = FALSE;
1552 called_as = US"-runq";
1555 /* If the program is called as "newaliases" treat it as equivalent to
1556 "exim -bi"; this is a sendmail convention. */
1558 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1559 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1562 receiving_message = FALSE;
1563 called_as = US"-newaliases";
1566 /* Save the original effective uid for a couple of uses later. It should
1567 normally be root, but in some esoteric environments it may not be. */
1569 original_euid = geteuid();
1571 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1572 to be the same as the real ones. This makes a difference only if Exim is setuid
1573 (or setgid) to something other than root, which could be the case in some
1574 special configurations. */
1576 real_uid = getuid();
1577 real_gid = getgid();
1579 if (real_uid == root_uid)
1585 /* If neither the original real uid nor the original euid was root, Exim is
1586 running in an unprivileged state. */
1588 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1590 /* If the first argument is --help, pretend there are no arguments. This will
1591 cause a brief message to be given. */
1593 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1595 /* Scan the program's arguments. Some can be dealt with right away; others are
1596 simply recorded for checking and handling afterwards. Do a high-level switch
1597 on the second character (the one after '-'), to save some effort. */
1599 for (i = 1; i < argc; i++)
1601 BOOL badarg = FALSE;
1602 uschar *arg = argv[i];
1606 /* An argument not starting with '-' is the start of a recipients list;
1607 break out of the options-scanning loop. */
1615 /* An option consistion of -- terminates the options */
1617 if (Ustrcmp(arg, "--") == 0)
1619 recipients_arg = i + 1;
1623 /* Handle flagged options */
1625 switchchar = arg[1];
1628 /* Make all -ex options synonymous with -oex arguments, since that
1629 is assumed by various callers. Also make -qR options synonymous with -R
1630 options, as that seems to be required as well. Allow for -qqR too, and
1631 the same for -S options. */
1633 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1634 Ustrncmp(arg+1, "qR", 2) == 0 ||
1635 Ustrncmp(arg+1, "qS", 2) == 0)
1637 switchchar = arg[2];
1640 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1642 switchchar = arg[3];
1644 queue_2stage = TRUE;
1647 /* Make -r synonymous with -f, since it is a documented alias */
1649 else if (arg[1] == 'r') switchchar = 'f';
1651 /* Make -ov synonymous with -v */
1653 else if (Ustrcmp(arg, "-ov") == 0)
1659 /* High-level switch on active initial letter */
1663 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1664 so has no need of it. */
1667 if (*argrest == 0) i++; /* Skip over the type */
1672 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1674 /* -bd: Run in daemon mode, awaiting SMTP connections.
1675 -bdf: Ditto, but in the foreground.
1678 if (*argrest == 'd')
1680 daemon_listen = TRUE;
1681 if (*(++argrest) == 'f') background_daemon = FALSE;
1682 else if (*argrest != 0) { badarg = TRUE; break; }
1685 /* -be: Run in expansion test mode
1686 -bem: Ditto, but read a message from a file first
1689 else if (*argrest == 'e')
1691 expansion_test = checking = TRUE;
1692 if (argrest[1] == 'm')
1694 if (++i >= argc) { badarg = TRUE; break; }
1695 expansion_test_message = argv[i];
1698 if (argrest[1] != 0) { badarg = TRUE; break; }
1701 /* -bF: Run system filter test */
1703 else if (*argrest == 'F')
1705 filter_test |= FTEST_SYSTEM;
1706 if (*(++argrest) != 0) { badarg = TRUE; break; }
1707 if (++i < argc) filter_test_sfile = argv[i]; else
1709 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1714 /* -bf: Run user filter test
1715 -bfd: Set domain for filter testing
1716 -bfl: Set local part for filter testing
1717 -bfp: Set prefix for filter testing
1718 -bfs: Set suffix for filter testing
1721 else if (*argrest == 'f')
1723 if (*(++argrest) == 0)
1725 filter_test |= FTEST_USER;
1726 if (++i < argc) filter_test_ufile = argv[i]; else
1728 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1736 fprintf(stderr, "exim: string expected after %s\n", arg);
1739 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1740 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1741 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1742 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1743 else { badarg = TRUE; break; }
1747 /* -bh: Host checking - an IP address must follow. */
1749 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1751 if (++i >= argc) { badarg = TRUE; break; }
1752 sender_host_address = argv[i];
1753 host_checking = checking = log_testing_mode = TRUE;
1754 host_checking_callout = argrest[1] == 'c';
1757 /* -bi: This option is used by sendmail to initialize *the* alias file,
1758 though it has the -oA option to specify a different file. Exim has no
1759 concept of *the* alias file, but since Sun's YP make script calls
1760 sendmail this way, some support must be provided. */
1762 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1764 /* -bm: Accept and deliver message - the default option. Reinstate
1765 receiving_message, which got turned off for all -b options. */
1767 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1769 /* -bnq: For locally originating messages, do not qualify unqualified
1770 addresses. In the envelope, this causes errors; in header lines they
1773 else if (Ustrcmp(argrest, "nq") == 0)
1775 allow_unqualified_sender = FALSE;
1776 allow_unqualified_recipient = FALSE;
1779 /* -bpxx: List the contents of the mail queue, in various forms. If
1780 the option is -bpc, just a queue count is needed. Otherwise, if the
1781 first letter after p is r, then order is random. */
1783 else if (*argrest == 'p')
1785 if (*(++argrest) == 'c')
1788 if (*(++argrest) != 0) badarg = TRUE;
1792 if (*argrest == 'r')
1794 list_queue_option = 8;
1797 else list_queue_option = 0;
1801 /* -bp: List the contents of the mail queue, top-level only */
1803 if (*argrest == 0) {}
1805 /* -bpu: List the contents of the mail queue, top-level undelivered */
1807 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1809 /* -bpa: List the contents of the mail queue, including all delivered */
1811 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1813 /* Unknown after -bp[r] */
1823 /* -bP: List the configuration variables given as the address list.
1824 Force -v, so configuration errors get displayed. */
1826 else if (Ustrcmp(argrest, "P") == 0)
1828 list_options = TRUE;
1829 debug_selector |= D_v;
1830 debug_file = stderr;
1833 /* -brt: Test retry configuration lookup */
1835 else if (Ustrcmp(argrest, "rt") == 0)
1837 test_retry_arg = i + 1;
1841 /* -brw: Test rewrite configuration */
1843 else if (Ustrcmp(argrest, "rw") == 0)
1845 test_rewrite_arg = i + 1;
1849 /* -bS: Read SMTP commands on standard input, but produce no replies -
1850 all errors are reported by sending messages. */
1852 else if (Ustrcmp(argrest, "S") == 0)
1853 smtp_input = smtp_batched_input = receiving_message = TRUE;
1855 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1856 on standard output. */
1858 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1860 /* -bt: address testing mode */
1862 else if (Ustrcmp(argrest, "t") == 0)
1863 address_test_mode = checking = log_testing_mode = TRUE;
1865 /* -bv: verify addresses */
1867 else if (Ustrcmp(argrest, "v") == 0)
1868 verify_address_mode = checking = log_testing_mode = TRUE;
1870 /* -bvs: verify sender addresses */
1872 else if (Ustrcmp(argrest, "vs") == 0)
1874 verify_address_mode = checking = log_testing_mode = TRUE;
1875 verify_as_sender = TRUE;
1878 /* -bV: Print version string and support details */
1880 else if (Ustrcmp(argrest, "V") == 0)
1882 printf("Exim version %s #%s built %s\n", version_string,
1883 version_cnumber, version_date);
1884 printf("%s\n", CS version_copyright);
1885 version_printed = TRUE;
1886 show_whats_supported(stdout);
1893 /* -C: change configuration file list; ignore if it isn't really
1894 a change! Enforce a prefix check if required. */
1899 if(++i < argc) argrest = argv[i]; else
1900 { badarg = TRUE; break; }
1902 if (Ustrcmp(config_main_filelist, argrest) != 0)
1904 #ifdef ALT_CONFIG_PREFIX
1906 int len = Ustrlen(ALT_CONFIG_PREFIX);
1907 uschar *list = argrest;
1909 while((filename = string_nextinlist(&list, &sep, big_buffer,
1910 big_buffer_size)) != NULL)
1912 if ((Ustrlen(filename) < len ||
1913 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1914 Ustrstr(filename, "/../") != NULL) &&
1915 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1917 fprintf(stderr, "-C Permission denied\n");
1923 config_main_filelist = argrest;
1924 config_changed = TRUE;
1929 /* -D: set up a macro definition */
1932 #ifdef DISABLE_D_OPTION
1933 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1938 macro_item *mlast = NULL;
1941 uschar *s = argrest;
1943 while (isspace(*s)) s++;
1945 if (*s < 'A' || *s > 'Z')
1947 fprintf(stderr, "exim: macro name set by -D must start with "
1948 "an upper case letter\n");
1952 while (isalnum(*s) || *s == '_')
1954 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1958 if (ptr == 0) { badarg = TRUE; break; }
1959 while (isspace(*s)) s++;
1962 if (*s++ != '=') { badarg = TRUE; break; }
1963 while (isspace(*s)) s++;
1966 for (m = macros; m != NULL; m = m->next)
1968 if (Ustrcmp(m->name, name) == 0)
1970 fprintf(stderr, "exim: duplicated -D in command line\n");
1976 m = store_get(sizeof(macro_item) + Ustrlen(name));
1978 m->command_line = TRUE;
1979 if (mlast == NULL) macros = m; else mlast->next = m;
1980 Ustrcpy(m->name, name);
1981 m->replacement = string_copy(s);
1983 if (clmacro_count >= MAX_CLMACROS)
1985 fprintf(stderr, "exim: too many -D options on command line\n");
1988 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1994 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1995 The latter is now a no-op, retained for compatibility only. If -dd is used,
1996 debugging subprocesses of the daemon is disabled. */
1999 if (Ustrcmp(argrest, "ropcr") == 0)
2001 /* drop_cr = TRUE; */
2004 /* Use an intermediate variable so that we don't set debugging while
2005 decoding the debugging bits. */
2009 unsigned int selector = D_default;
2012 if (*argrest == 'd')
2014 debug_daemon = TRUE;
2018 decode_bits(&selector, NULL, D_memory, 0, argrest, debug_options,
2019 debug_options_count, US"debug");
2020 debug_selector = selector;
2025 /* -E: This is a local error message. This option is not intended for
2026 external use at all, but is not restricted to trusted callers because it
2027 does no harm (just suppresses certain error messages) and if Exim is run
2028 not setuid root it won't always be trusted when it generates error
2029 messages using this option. If there is a message id following -E, point
2030 message_reference at it, for logging. */
2033 local_error_message = TRUE;
2034 if (mac_ismsgid(argrest)) message_reference = argrest;
2038 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2039 option, so it looks as if historically the -oex options are also callable
2040 without the leading -o. So we have to accept them. Before the switch,
2041 anything starting -oe has been converted to -e. Exim does not support all
2042 of the sendmail error options. */
2045 if (Ustrcmp(argrest, "e") == 0)
2047 arg_error_handling = ERRORS_SENDER;
2048 errors_sender_rc = EXIT_SUCCESS;
2050 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2051 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2052 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2053 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2058 /* -F: Set sender's full name, used instead of the gecos entry from
2059 the password file. Since users can usually alter their gecos entries,
2060 there's no security involved in using this instead. The data can follow
2061 the -F or be in the next argument. */
2066 if(++i < argc) argrest = argv[i]; else
2067 { badarg = TRUE; break; }
2069 originator_name = argrest;
2070 sender_name_forced = TRUE;
2074 /* -f: Set sender's address - this value is only actually used if Exim is
2075 run by a trusted user, or if untrusted_set_sender is set and matches the
2076 address, except that the null address can always be set by any user. The
2077 test for this happens later, when the value given here is ignored when not
2078 permitted. For an untrusted user, the actual sender is still put in Sender:
2079 if it doesn't match the From: header (unless no_local_from_check is set).
2080 The data can follow the -f or be in the next argument. The -r switch is an
2081 obsolete form of -f but since there appear to be programs out there that
2082 use anything that sendmail has ever supported, better accept it - the
2083 synonymizing is done before the switch above.
2085 At this stage, we must allow domain literal addresses, because we don't
2086 know what the setting of allow_domain_literals is yet. Ditto for trailing
2087 dots and strip_trailing_dot. */
2095 if (i+1 < argc) argrest = argv[++i]; else
2096 { badarg = TRUE; break; }
2100 sender_address = string_sprintf(""); /* Ensure writeable memory */
2104 uschar *temp = argrest + Ustrlen(argrest) - 1;
2105 while (temp >= argrest && isspace(*temp)) temp--;
2106 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2107 allow_domain_literals = TRUE;
2108 strip_trailing_dot = TRUE;
2109 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2110 &sender_address_domain, TRUE);
2111 allow_domain_literals = FALSE;
2112 strip_trailing_dot = FALSE;
2113 if (sender_address == NULL)
2115 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2116 return EXIT_FAILURE;
2119 sender_address_forced = TRUE;
2123 /* This is some Sendmail thing which can be ignored */
2128 /* -h: Set the hop count for an incoming message. Exim does not currently
2129 support this; it always computes it by counting the Received: headers.
2130 To put it in will require a change to the spool header file format. */
2135 if(++i < argc) argrest = argv[i]; else
2136 { badarg = TRUE; break; }
2138 if (!isdigit(*argrest)) badarg = TRUE;
2142 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2143 not to be documented for sendmail but mailx (at least) uses it) */
2146 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2151 receiving_message = FALSE;
2153 /* -MC: continue delivery of another message via an existing open
2154 file descriptor. This option is used for an internal call by the
2155 smtp transport when there is a pending message waiting to go to an
2156 address to which it has got a connection. Five subsequent arguments are
2157 required: transport name, host name, IP address, sequence number, and
2158 message_id. Transports may decline to create new processes if the sequence
2159 number gets too big. The channel is stdin. This (-MC) must be the last
2160 argument. There's a subsequent check that the real-uid is privileged.
2162 If we are running in the test harness. delay for a bit, to let the process
2163 that set this one up complete. This makes for repeatability of the logging,
2166 if (Ustrcmp(argrest, "C") == 0)
2168 union sockaddr_46 interface_sock;
2169 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2173 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2174 return EXIT_FAILURE;
2177 if (msg_action_arg >= 0)
2179 fprintf(stderr, "exim: incompatible arguments\n");
2180 return EXIT_FAILURE;
2183 continue_transport = argv[++i];
2184 continue_hostname = argv[++i];
2185 continue_host_address = argv[++i];
2186 continue_sequence = Uatoi(argv[++i]);
2187 msg_action = MSG_DELIVER;
2188 msg_action_arg = ++i;
2189 forced_delivery = TRUE;
2190 queue_run_pid = passed_qr_pid;
2191 queue_run_pipe = passed_qr_pipe;
2193 if (!mac_ismsgid(argv[i]))
2195 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2197 return EXIT_FAILURE;
2200 /* Set up $sending_ip_address and $sending_port */
2202 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2204 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2208 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2210 return EXIT_FAILURE;
2213 if (running_in_test_harness) millisleep(500);
2217 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2218 precedes -MC (see above). The flag indicates that the host to which
2219 Exim is connected has accepted an AUTH sequence. */
2221 else if (Ustrcmp(argrest, "CA") == 0)
2223 smtp_authenticated = TRUE;
2227 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2228 it preceded -MC (see above) */
2230 else if (Ustrcmp(argrest, "CP") == 0)
2232 smtp_use_pipelining = TRUE;
2236 /* -MCQ: pass on the pid of the queue-running process that started
2237 this chain of deliveries and the fd of its synchronizing pipe; this
2238 is useful only when it precedes -MC (see above) */
2240 else if (Ustrcmp(argrest, "CQ") == 0)
2242 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2244 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2249 /* -MCS: set the smtp_use_size flag; this is useful only when it
2250 precedes -MC (see above) */
2252 else if (Ustrcmp(argrest, "CS") == 0)
2254 smtp_use_size = TRUE;
2258 /* -MCT: set the tls_offered flag; this is useful only when it
2259 precedes -MC (see above). The flag indicates that the host to which
2260 Exim is connected has offered TLS support. */
2263 else if (Ustrcmp(argrest, "CT") == 0)
2270 /* -M[x]: various operations on the following list of message ids:
2271 -M deliver the messages, ignoring next retry times and thawing
2272 -Mc deliver the messages, checking next retry times, no thawing
2273 -Mf freeze the messages
2274 -Mg give up on the messages
2275 -Mt thaw the messages
2276 -Mrm remove the messages
2277 In the above cases, this must be the last option. There are also the
2278 following options which are followed by a single message id, and which
2279 act on that message. Some of them use the "recipient" addresses as well.
2280 -Mar add recipient(s)
2281 -Mmad mark all recipients delivered
2282 -Mmd mark recipients(s) delivered
2284 -Mset load a message for use with -be
2290 else if (*argrest == 0)
2292 msg_action = MSG_DELIVER;
2293 forced_delivery = deliver_force_thaw = TRUE;
2295 else if (Ustrcmp(argrest, "ar") == 0)
2297 msg_action = MSG_ADD_RECIPIENT;
2298 one_msg_action = TRUE;
2300 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2301 else if (Ustrcmp(argrest, "es") == 0)
2303 msg_action = MSG_EDIT_SENDER;
2304 one_msg_action = TRUE;
2306 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2307 else if (Ustrcmp(argrest, "g") == 0)
2309 msg_action = MSG_DELIVER;
2310 deliver_give_up = TRUE;
2312 else if (Ustrcmp(argrest, "mad") == 0)
2314 msg_action = MSG_MARK_ALL_DELIVERED;
2316 else if (Ustrcmp(argrest, "md") == 0)
2318 msg_action = MSG_MARK_DELIVERED;
2319 one_msg_action = TRUE;
2321 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2322 else if (Ustrcmp(argrest, "set") == 0)
2324 msg_action = MSG_LOAD;
2325 one_msg_action = TRUE;
2327 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2328 else if (Ustrcmp(argrest, "vb") == 0)
2330 msg_action = MSG_SHOW_BODY;
2331 one_msg_action = TRUE;
2333 else if (Ustrcmp(argrest, "vh") == 0)
2335 msg_action = MSG_SHOW_HEADER;
2336 one_msg_action = TRUE;
2338 else if (Ustrcmp(argrest, "vl") == 0)
2340 msg_action = MSG_SHOW_LOG;
2341 one_msg_action = TRUE;
2343 else { badarg = TRUE; break; }
2345 /* All the -Mxx options require at least one message id. */
2347 msg_action_arg = i + 1;
2348 if (msg_action_arg >= argc)
2350 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2351 return EXIT_FAILURE;
2354 /* Some require only message ids to follow */
2356 if (!one_msg_action)
2359 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2361 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2363 return EXIT_FAILURE;
2365 goto END_ARG; /* Remaining args are ids */
2368 /* Others require only one message id, possibly followed by addresses,
2369 which will be handled as normal arguments. */
2373 if (!mac_ismsgid(argv[msg_action_arg]))
2375 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2376 argv[msg_action_arg], arg);
2377 return EXIT_FAILURE;
2384 /* Some programs seem to call the -om option without the leading o;
2385 for sendmail it askes for "me too". Exim always does this. */
2388 if (*argrest != 0) badarg = TRUE;
2392 /* -N: don't do delivery - a debugging option that stops transports doing
2393 their thing. It implies debugging at the D_v level. */
2398 dont_deliver = TRUE;
2399 debug_selector |= D_v;
2400 debug_file = stderr;
2406 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2412 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2413 option to the specified value. This form uses long names. We need to handle
2414 -O option=value and -Ooption=value. */
2421 fprintf(stderr, "exim: string expected after -O\n");
2429 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2432 if (*argrest == 'A')
2434 alias_arg = argrest + 1;
2435 if (alias_arg[0] == 0)
2437 if (i+1 < argc) alias_arg = argv[++i]; else
2439 fprintf(stderr, "exim: string expected after -oA\n");
2445 /* -oB: Set a connection message max value for remote deliveries */
2447 else if (*argrest == 'B')
2449 uschar *p = argrest + 1;
2452 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2454 connection_max_messages = 1;
2463 fprintf(stderr, "exim: number expected after -oB\n");
2466 connection_max_messages = Uatoi(p);
2470 /* -odb: background delivery */
2472 else if (Ustrcmp(argrest, "db") == 0)
2474 synchronous_delivery = FALSE;
2475 arg_queue_only = FALSE;
2476 queue_only_set = TRUE;
2479 /* -odf: foreground delivery (smail-compatible option); same effect as
2480 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2483 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2485 synchronous_delivery = TRUE;
2486 arg_queue_only = FALSE;
2487 queue_only_set = TRUE;
2490 /* -odq: queue only */
2492 else if (Ustrcmp(argrest, "dq") == 0)
2494 synchronous_delivery = FALSE;
2495 arg_queue_only = TRUE;
2496 queue_only_set = TRUE;
2499 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2500 but no remote delivery */
2502 else if (Ustrcmp(argrest, "dqs") == 0)
2505 arg_queue_only = FALSE;
2506 queue_only_set = TRUE;
2509 /* -oex: Sendmail error flags. As these are also accepted without the
2510 leading -o prefix, for compatibility with vacation and other callers,
2511 they are handled with -e above. */
2513 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2514 -oitrue: Another sendmail syntax for the same */
2516 else if (Ustrcmp(argrest, "i") == 0 ||
2517 Ustrcmp(argrest, "itrue") == 0)
2520 /* -oM*: Set various characteristics for an incoming message; actually
2521 acted on for trusted callers only. */
2523 else if (*argrest == 'M')
2527 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2531 /* -oMa: Set sender host address */
2533 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2535 /* -oMaa: Set authenticator name */
2537 else if (Ustrcmp(argrest, "Maa") == 0)
2538 sender_host_authenticated = argv[++i];
2540 /* -oMas: setting authenticated sender */
2542 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2544 /* -oMai: setting authenticated id */
2546 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2548 /* -oMi: Set incoming interface address */
2550 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2552 /* -oMr: Received protocol */
2554 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2556 /* -oMs: Set sender host name */
2558 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2560 /* -oMt: Set sender ident */
2562 else if (Ustrcmp(argrest, "Mt") == 0)
2564 sender_ident_set = TRUE;
2565 sender_ident = argv[++i];
2568 /* Else a bad argument */
2577 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2578 seem to call this as -m (undocumented), so that is also accepted (see
2581 else if (Ustrcmp(argrest, "m") == 0) {}
2583 /* -oo: An ancient flag for old-style addresses which still seems to
2584 crop up in some calls (see in SCO). */
2586 else if (Ustrcmp(argrest, "o") == 0) {}
2588 /* -oP <name>: set pid file path for daemon */
2590 else if (Ustrcmp(argrest, "P") == 0)
2591 override_pid_file_path = argv[++i];
2593 /* -or <n>: set timeout for non-SMTP acceptance
2594 -os <n>: set timeout for SMTP acceptance */
2596 else if (*argrest == 'r' || *argrest == 's')
2598 int *tp = (*argrest == 'r')?
2599 &arg_receive_timeout : &arg_smtp_receive_timeout;
2600 if (argrest[1] == 0)
2602 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2604 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2607 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2612 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2614 else if (Ustrcmp(argrest, "X") == 0)
2615 override_local_interfaces = argv[++i];
2617 /* Unknown -o argument */
2623 /* -ps: force Perl startup; -pd force delayed Perl startup */
2627 if (*argrest == 's' && argrest[1] == 0)
2629 perl_start_option = 1;
2632 if (*argrest == 'd' && argrest[1] == 0)
2634 perl_start_option = -1;
2639 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2640 which sets the host protocol and host name */
2644 if (i+1 < argc) argrest = argv[++i]; else
2645 { badarg = TRUE; break; }
2650 uschar *hn = Ustrchr(argrest, ':');
2653 received_protocol = argrest;
2657 received_protocol = string_copyn(argrest, hn - argrest);
2658 sender_host_name = hn + 1;
2665 receiving_message = FALSE;
2666 if (queue_interval >= 0)
2668 fprintf(stderr, "exim: -q specified more than once\n");
2672 /* -qq...: Do queue runs in a 2-stage manner */
2674 if (*argrest == 'q')
2676 queue_2stage = TRUE;
2680 /* -qi...: Do only first (initial) deliveries */
2682 if (*argrest == 'i')
2684 queue_run_first_delivery = TRUE;
2688 /* -qf...: Run the queue, forcing deliveries
2689 -qff..: Ditto, forcing thawing as well */
2691 if (*argrest == 'f')
2693 queue_run_force = TRUE;
2694 if (*(++argrest) == 'f')
2696 deliver_force_thaw = TRUE;
2701 /* -q[f][f]l...: Run the queue only on local deliveries */
2703 if (*argrest == 'l')
2705 queue_run_local = TRUE;
2709 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2710 optionally starting from a given message id. */
2712 if (*argrest == 0 &&
2713 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2716 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2717 start_queue_run_id = argv[++i];
2718 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2719 stop_queue_run_id = argv[++i];
2722 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2723 optionally local only. */
2728 queue_interval = readconf_readtime(argrest, 0, FALSE);
2730 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2731 if (queue_interval <= 0)
2733 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2740 case 'R': /* Synonymous with -qR... */
2741 receiving_message = FALSE;
2743 /* -Rf: As -R (below) but force all deliveries,
2744 -Rff: Ditto, but also thaw all frozen messages,
2745 -Rr: String is regex
2746 -Rrf: Regex and force
2747 -Rrff: Regex and force and thaw
2749 in all cases provided there are no further characters in this
2755 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2757 if (Ustrcmp(argrest, rsopts[i]) == 0)
2759 if (i != 2) queue_run_force = TRUE;
2760 if (i >= 2) deliver_selectstring_regex = TRUE;
2761 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2762 argrest += Ustrlen(rsopts[i]);
2767 /* -R: Set string to match in addresses for forced queue run to
2768 pick out particular messages. */
2772 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2774 fprintf(stderr, "exim: string expected after -R\n");
2778 else deliver_selectstring = argrest;
2782 /* -r: an obsolete synonym for -f (see above) */
2785 /* -S: Like -R but works on sender. */
2787 case 'S': /* Synonymous with -qS... */
2788 receiving_message = FALSE;
2790 /* -Sf: As -S (below) but force all deliveries,
2791 -Sff: Ditto, but also thaw all frozen messages,
2792 -Sr: String is regex
2793 -Srf: Regex and force
2794 -Srff: Regex and force and thaw
2796 in all cases provided there are no further characters in this
2802 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2804 if (Ustrcmp(argrest, rsopts[i]) == 0)
2806 if (i != 2) queue_run_force = TRUE;
2807 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2808 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2809 argrest += Ustrlen(rsopts[i]);
2814 /* -S: Set string to match in addresses for forced queue run to
2815 pick out particular messages. */
2819 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2821 fprintf(stderr, "exim: string expected after -S\n");
2825 else deliver_selectstring_sender = argrest;
2828 /* -Tqt is an option that is exclusively for use by the testing suite.
2829 It is not recognized in other circumstances. It allows for the setting up
2830 of explicit "queue times" so that various warning/retry things can be
2831 tested. Otherwise variability of clock ticks etc. cause problems. */
2834 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2835 fudged_queue_times = argv[++i];
2840 /* -t: Set flag to extract recipients from body of message. */
2843 if (*argrest == 0) extract_recipients = TRUE;
2845 /* -ti: Set flag to extract recipients from body of message, and also
2846 specify that dot does not end the message. */
2848 else if (Ustrcmp(argrest, "i") == 0)
2850 extract_recipients = TRUE;
2854 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2857 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2864 /* -U: This means "initial user submission" in sendmail, apparently. The
2865 doc claims that in future sendmail may refuse syntactically invalid
2866 messages instead of fixing them. For the moment, we just ignore it. */
2872 /* -v: verify things - this is a very low-level debugging */
2877 debug_selector |= D_v;
2878 debug_file = stderr;
2884 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2886 The -x flag tells the sendmail command that mail from a local
2887 mail program has National Language Support (NLS) extended characters
2888 in the body of the mail item. The sendmail command can send mail with
2889 extended NLS characters across networks that normally corrupts these
2892 As Exim is 8-bit clean, it just ignores this flag. */
2895 if (*argrest != 0) badarg = TRUE;
2898 /* All other initial characters are errors */
2903 } /* End of high-level switch statement */
2905 /* Failed to recognize the option, or syntax error */
2909 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2910 "option %s\n", arg);
2916 /* If -R or -S have been specified without -q, assume a single queue run. */
2918 if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
2919 queue_interval < 0) queue_interval = 0;
2922 /* Arguments have been processed. Check for incompatibilities. */
2926 (smtp_input || extract_recipients || recipients_arg < argc) &&
2927 (daemon_listen || queue_interval >= 0 || bi_option ||
2928 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2929 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2932 msg_action_arg > 0 &&
2933 (daemon_listen || queue_interval >= 0 || list_options ||
2934 (checking && msg_action != MSG_LOAD) ||
2935 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2938 (daemon_listen || queue_interval >= 0) &&
2939 (sender_address != NULL || list_options || list_queue || checking ||
2943 daemon_listen && queue_interval == 0
2947 (checking || smtp_input || extract_recipients ||
2948 filter_test != FTEST_NONE || bi_option)
2951 verify_address_mode &&
2952 (address_test_mode || smtp_input || extract_recipients ||
2953 filter_test != FTEST_NONE || bi_option)
2956 address_test_mode && (smtp_input || extract_recipients ||
2957 filter_test != FTEST_NONE || bi_option)
2960 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
2964 deliver_selectstring != NULL && queue_interval < 0
2967 msg_action == MSG_LOAD &&
2968 (!expansion_test || expansion_test_message != NULL)
2972 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2976 /* If debugging is set up, set the file and the file descriptor to pass on to
2977 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2978 to run in the foreground. */
2980 if (debug_selector != 0)
2982 debug_file = stderr;
2983 debug_fd = fileno(debug_file);
2984 background_daemon = FALSE;
2985 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2986 if (debug_selector != D_v) /* -v only doesn't show this */
2988 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2989 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2991 show_whats_supported(stderr);
2995 /* When started with root privilege, ensure that the limits on the number of
2996 open files and the number of processes (where that is accessible) are
2997 sufficiently large, or are unset, in case Exim has been called from an
2998 environment where the limits are screwed down. Not all OS have the ability to
2999 change some of these limits. */
3003 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3009 #ifdef RLIMIT_NOFILE
3010 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3012 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3014 rlp.rlim_cur = rlp.rlim_max = 0;
3017 /* I originally chose 1000 as a nice big number that was unlikely to
3018 be exceeded. It turns out that some older OS have a fixed upper limit of
3021 if (rlp.rlim_cur < 1000)
3023 rlp.rlim_cur = rlp.rlim_max = 1000;
3024 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3026 rlp.rlim_cur = rlp.rlim_max = 256;
3027 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3028 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3035 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3037 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3039 rlp.rlim_cur = rlp.rlim_max = 0;
3042 #ifdef RLIM_INFINITY
3043 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3045 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3047 if (rlp.rlim_cur < 1000)
3049 rlp.rlim_cur = rlp.rlim_max = 1000;
3051 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3052 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3058 /* Exim is normally entered as root (but some special configurations are
3059 possible that don't do this). However, it always spins off sub-processes that
3060 set their uid and gid as required for local delivery. We don't want to pass on
3061 any extra groups that root may belong to, so we want to get rid of them all at
3064 We need to obey setgroups() at this stage, before possibly giving up root
3065 privilege for a changed configuration file, but later on we might need to
3066 check on the additional groups for the admin user privilege - can't do that
3067 till after reading the config, which might specify the exim gid. Therefore,
3068 save the group list here first. */
3070 group_count = getgroups(NGROUPS_MAX, group_list);
3072 /* There is a fundamental difference in some BSD systems in the matter of
3073 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3074 known not to be different. On the "different" systems there is a single group
3075 list, and the first entry in it is the current group. On all other versions of
3076 Unix there is a supplementary group list, which is in *addition* to the current
3077 group. Consequently, to get rid of all extraneous groups on a "standard" system
3078 you pass over 0 groups to setgroups(), while on a "different" system you pass
3079 over a single group - the current group, which is always the first group in the
3080 list. Calling setgroups() with zero groups on a "different" system results in
3081 an error return. The following code should cope with both types of system.
3083 However, if this process isn't running as root, setgroups() can't be used
3084 since you have to be root to run it, even if throwing away groups. Not being
3085 root here happens only in some unusual configurations. We just ignore the
3088 if (setgroups(0, NULL) != 0)
3090 if (setgroups(1, group_list) != 0 && !unprivileged)
3092 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3097 /* If the configuration file name has been altered by an argument on the
3098 command line (either a new file name or a macro definition) and the caller is
3099 not root or the exim user, or if this is a filter testing run, remove any
3100 setuid privilege the program has, and run as the underlying user.
3102 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
3103 severely restricts the use of -C for some purposes.
3105 Otherwise, set the real ids to the effective values (should be root unless run
3106 from inetd, which it can either be root or the exim uid, if one is configured).
3108 There is a private mechanism for bypassing some of this, in order to make it
3109 possible to test lots of configurations automatically, without having either to
3110 recompile each time, or to patch in an actual configuration file name and other
3111 values (such as the path name). If running in the test harness, pretend that
3112 configuration file changes and macro definitions haven't happened. */
3115 (config_changed || macros != NULL) && /* Config changed, and */
3116 real_uid != root_uid && /* Not root, and */
3117 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3118 real_uid != exim_uid && /* Not exim, and */
3120 !running_in_test_harness /* Not fudged */
3122 expansion_test /* expansion testing */
3124 filter_test != FTEST_NONE) /* Filter testing */
3126 setgroups(group_count, group_list);
3127 exim_setugid(real_uid, real_gid, FALSE,
3128 US"-C, -D, -be or -bf forces real uid");
3129 removed_privilege = TRUE;
3131 /* In the normal case when Exim is called like this, stderr is available
3132 and should be used for any logging information because attempts to write
3133 to the log will usually fail. To arrange this, we unset really_exim. However,
3134 if no stderr is available there is no point - we might as well have a go
3135 at the log (if it fails, syslog will be written). */
3137 if (log_stderr != NULL) really_exim = FALSE;
3140 /* Privilege is to be retained for the moment. It may be dropped later,
3141 depending on the job that this Exim process has been asked to do. For now, set
3142 the real uid to the effective so that subsequent re-execs of Exim are done by a
3145 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3147 /* If testing a filter, open the file(s) now, before wasting time doing other
3148 setups and reading the message. */
3150 if ((filter_test & FTEST_SYSTEM) != 0)
3152 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3155 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3157 return EXIT_FAILURE;
3161 if ((filter_test & FTEST_USER) != 0)
3163 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3166 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3168 return EXIT_FAILURE;
3172 /* Read the main runtime configuration data; this gives up if there
3173 is a failure. It leaves the configuration file open so that the subsequent
3174 configuration data for delivery can be read if needed. */
3178 /* Handle the decoding of logging options. */
3180 decode_bits(&log_write_selector, &log_extra_selector, 0, 0, log_selector_string,
3181 log_options, log_options_count, US"log");
3185 debug_printf("configuration file is %s\n", config_main_filename);
3186 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3187 log_extra_selector);
3190 /* If domain literals are not allowed, check the sender address that was
3191 supplied with -f. Ditto for a stripped trailing dot. */
3193 if (sender_address != NULL)
3195 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3197 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3198 "allowed\n", sender_address);
3199 return EXIT_FAILURE;
3201 if (f_end_dot && !strip_trailing_dot)
3203 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3204 "(trailing dot not allowed)\n", sender_address);
3205 return EXIT_FAILURE;
3209 /* Paranoia check of maximum lengths of certain strings. There is a check
3210 on the length of the log file path in log.c, which will come into effect
3211 if there are any calls to write the log earlier than this. However, if we
3212 get this far but the string is very long, it is better to stop now than to
3213 carry on and (e.g.) receive a message and then have to collapse. The call to
3214 log_write() from here will cause the ultimate panic collapse if the complete
3215 file name exceeds the buffer length. */
3217 if (Ustrlen(log_file_path) > 200)
3218 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3219 "log_file_path is longer than 200 chars: aborting");
3221 if (Ustrlen(pid_file_path) > 200)
3222 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3223 "pid_file_path is longer than 200 chars: aborting");
3225 if (Ustrlen(spool_directory) > 200)
3226 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3227 "spool_directory is longer than 200 chars: aborting");
3229 /* Length check on the process name given to syslog for its TAG field,
3230 which is only permitted to be 32 characters or less. See RFC 3164. */
3232 if (Ustrlen(syslog_processname) > 32)
3233 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3234 "syslog_processname is longer than 32 chars: aborting");
3236 /* In some operating systems, the environment variable TMPDIR controls where
3237 temporary files are created; Exim doesn't use these (apart from when delivering
3238 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3239 If TMPDIR is found in the environment, reset it to the value defined in the
3240 TMPDIR macro, if this macro is defined. */
3245 for (p = USS environ; *p != NULL; p++)
3247 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3248 Ustrcmp(*p+7, TMPDIR) != 0)
3250 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3251 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3253 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3259 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3260 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3261 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3262 called by a user who has set the TZ variable. This then affects the timestamps
3263 in log files and in Received: headers, and any created Date: header lines. The
3264 required timezone is settable in the configuration file, so nothing can be done
3265 about this earlier - but hopefully nothing will normally be logged earlier than
3266 this. We have to make a new environment if TZ is wrong, but don't bother if
3267 timestamps_utc is set, because then all times are in UTC anyway. */
3269 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3271 timestamps_utc = TRUE;
3275 uschar *envtz = US getenv("TZ");
3276 if ((envtz == NULL && timezone_string != NULL) ||
3278 (timezone_string == NULL ||
3279 Ustrcmp(timezone_string, envtz) != 0)))
3281 uschar **p = USS environ;
3285 while (*p++ != NULL) count++;
3286 if (envtz == NULL) count++;
3287 newp = new = malloc(sizeof(uschar *) * (count + 1));
3288 for (p = USS environ; *p != NULL; p++)
3290 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3293 if (timezone_string != NULL)
3295 *newp = malloc(Ustrlen(timezone_string) + 4);
3296 sprintf(CS *newp++, "TZ=%s", timezone_string);
3301 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3302 tod_stamp(tod_log));
3306 /* Handle the case when we have removed the setuid privilege because of -C or
3307 -D. This means that the caller of Exim was not root, and, provided that
3308 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3311 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3312 were running as the exim user defined in the configuration file (different to
3313 the one in the binary). The sysadmin may expect this case to retain privilege
3314 because "the binary was called by the Exim user", but it hasn't, because of the
3315 order in which it handles this stuff. There are two possibilities:
3317 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3318 to do message deliveries. Thus, the fact that it is running as a
3319 non-privileged user is plausible, and might be wanted in some special
3320 configurations. However, really_exim will have been set false when
3321 privilege was dropped, to stop Exim trying to write to its normal log
3322 files. Therefore, re-enable normal log processing, assuming the sysadmin
3323 has set up the log directory correctly.
3325 (2) If deliver_drop_privilege is not set, the configuration won't work as
3326 apparently intended, and so we log a panic message. In order to retain
3327 root for -C or -D, the caller must either be root or the Exim user
3328 defined in the binary (when deliver_drop_ privilege is false).
3330 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3331 built-in exim user or one defined in the configuration. In either event,
3332 re-enable log processing, assuming the sysadmin knows what they are doing. */
3334 if (removed_privilege && (config_changed || macros != NULL) &&
3335 real_uid == exim_uid)
3337 #ifdef ALT_CONFIG_ROOT_ONLY
3338 really_exim = TRUE; /* let logging work normally */
3341 if (deliver_drop_privilege)
3342 really_exim = TRUE; /* let logging work normally */
3344 log_write(0, LOG_MAIN|LOG_PANIC,
3345 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3346 (int)exim_uid, config_changed? "-C" : "-D");
3350 /* Start up Perl interpreter if Perl support is configured and there is a
3351 perl_startup option, and the configuration or the command line specifies
3352 initializing starting. Note that the global variables are actually called
3353 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3356 if (perl_start_option != 0)
3357 opt_perl_at_start = (perl_start_option > 0);
3358 if (opt_perl_at_start && opt_perl_startup != NULL)
3361 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3362 errstr = init_perl(opt_perl_startup);
3365 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3366 return EXIT_FAILURE;
3368 opt_perl_started = TRUE;
3370 #endif /* EXIM_PERL */
3372 /* Log the arguments of the call if the configuration file said so. This is
3373 a debugging feature for finding out what arguments certain MUAs actually use.
3374 Don't attempt it if logging is disabled, or if listing variables or if
3375 verifying/testing addresses or expansions. */
3377 if (((debug_selector & D_any) != 0 || (log_extra_selector & LX_arguments) != 0)
3378 && really_exim && !list_options && !checking)
3381 uschar *p = big_buffer;
3383 (void)getcwd(CS p+4, big_buffer_size - 4);
3385 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3387 for (i = 0; i < argc; i++)
3389 int len = Ustrlen(argv[i]);
3392 if (p + len + 8 >= big_buffer + big_buffer_size)
3395 log_write(0, LOG_MAIN, "%s", big_buffer);
3396 Ustrcpy(big_buffer, "...");
3399 printing = string_printing(argv[i]);
3400 if (printing[0] == 0) quote = US"\""; else
3402 uschar *pp = printing;
3404 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3406 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3407 (p - big_buffer) - 4), printing, quote);
3411 if ((log_extra_selector & LX_arguments) != 0)
3412 log_write(0, LOG_MAIN, "%s", big_buffer);
3414 debug_printf("%s\n", big_buffer);
3417 /* Set the working directory to be the top-level spool directory. We don't rely
3418 on this in the code, which always uses fully qualified names, but it's useful
3419 for core dumps etc. Don't complain if it fails - the spool directory might not
3420 be generally accessible and calls with the -C option (and others) have lost
3421 privilege by now. Before the chdir, we try to ensure that the directory exists.
3424 if (Uchdir(spool_directory) != 0)
3426 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
3427 (void)Uchdir(spool_directory);
3430 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3431 alias file. Exim doesn't have such a concept, but this call is screwed into
3432 Sun's YP makefiles. Handle this by calling a configured script, as the real
3433 user who called Exim. The -oA option can be used to pass an argument to the
3438 (void)fclose(config_file);
3439 if (bi_command != NULL)
3443 argv[i++] = bi_command;
3444 if (alias_arg != NULL) argv[i++] = alias_arg;
3447 setgroups(group_count, group_list);
3448 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3450 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3451 (argv[1] == NULL)? US"" : argv[1]);
3453 execv(CS argv[0], (char *const *)argv);
3454 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3459 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3464 /* If an action on specific messages is requested, or if a daemon or queue
3465 runner is being started, we need to know if Exim was called by an admin user.
3466 This is the case if the real user is root or exim, or if the real group is
3467 exim, or if one of the supplementary groups is exim or a group listed in
3468 admin_groups. We don't fail all message actions immediately if not admin_user,
3469 since some actions can be performed by non-admin users. Instead, set admin_user
3470 for later interrogation. */
3472 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3478 for (i = 0; i < group_count; i++)
3480 if (group_list[i] == exim_gid) admin_user = TRUE;
3481 else if (admin_groups != NULL)
3483 for (j = 1; j <= (int)(admin_groups[0]); j++)
3484 if (admin_groups[j] == group_list[i])
3485 { admin_user = TRUE; break; }
3487 if (admin_user) break;
3491 /* Another group of privileged users are the trusted users. These are root,
3492 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3493 are permitted to specify sender_addresses with -f on the command line, and
3494 other message parameters as well. */
3496 if (real_uid == root_uid || real_uid == exim_uid)
3497 trusted_caller = TRUE;
3502 if (trusted_users != NULL)
3504 for (i = 1; i <= (int)(trusted_users[0]); i++)
3505 if (trusted_users[i] == real_uid)
3506 { trusted_caller = TRUE; break; }
3509 if (!trusted_caller && trusted_groups != NULL)
3511 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3513 if (trusted_groups[i] == real_gid)
3514 trusted_caller = TRUE;
3515 else for (j = 0; j < group_count; j++)
3517 if (trusted_groups[i] == group_list[j])
3518 { trusted_caller = TRUE; break; }
3520 if (trusted_caller) break;
3525 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3526 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3528 /* Only an admin user may start the daemon or force a queue run in the default
3529 configuration, but the queue run restriction can be relaxed. Only an admin
3530 user may request that a message be returned to its sender forthwith. Only an
3531 admin user may specify a debug level greater than D_v (because it might show
3532 passwords, etc. in lookup queries). Only an admin user may request a queue
3537 BOOL debugset = (debug_selector & ~D_v) != 0;
3538 if (deliver_give_up || daemon_listen ||
3539 (count_queue && queue_list_requires_admin) ||
3540 (list_queue && queue_list_requires_admin) ||
3541 (queue_interval >= 0 && prod_requires_admin) ||
3542 (debugset && !running_in_test_harness))
3544 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3549 /* If the real user is not root or the exim uid, the argument for passing
3550 in an open TCP/IP connection for another message is not permitted, nor is
3551 running with the -N option for any delivery action, unless this call to exim is
3552 one that supplied an input message, or we are using a patched exim for
3553 regression testing. */
3555 if (real_uid != root_uid && real_uid != exim_uid &&
3556 (continue_hostname != NULL ||
3558 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3559 )) && !running_in_test_harness)
3561 fprintf(stderr, "exim: Permission denied\n");
3562 return EXIT_FAILURE;
3565 /* If the caller is not trusted, certain arguments are ignored when running for
3566 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3567 Note that authority for performing certain actions on messages is tested in the
3568 queue_action() function. */
3570 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3572 sender_host_name = sender_host_address = interface_address =
3573 sender_ident = received_protocol = NULL;
3574 sender_host_port = interface_port = 0;
3575 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3578 /* If a sender host address is set, extract the optional port number off the
3579 end of it and check its syntax. Do the same thing for the interface address.
3580 Exim exits if the syntax is bad. */
3584 if (sender_host_address != NULL)
3585 sender_host_port = check_port(sender_host_address);
3586 if (interface_address != NULL)
3587 interface_port = check_port(interface_address);
3590 /* If an SMTP message is being received check to see if the standard input is a
3591 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3592 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3597 union sockaddr_46 inetd_sock;
3598 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
3599 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3601 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3602 if (family == AF_INET || family == AF_INET6)
3604 union sockaddr_46 interface_sock;
3605 size = sizeof(interface_sock);
3607 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3608 interface_address = host_ntoa(-1, &interface_sock, NULL,
3611 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3613 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3616 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3617 NULL, &sender_host_port);
3618 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3619 "inetd is not supported when mua_wrapper is set");
3624 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3625 return EXIT_FAILURE;
3631 /* If the load average is going to be needed while receiving a message, get it
3632 now for those OS that require the first call to os_getloadavg() to be done as
3633 root. There will be further calls later for each message received. */
3635 #ifdef LOAD_AVG_NEEDS_ROOT
3636 if (receiving_message &&
3637 (queue_only_load >= 0 ||
3638 (is_inetd && smtp_load_reserve >= 0)
3641 load_average = os_getloadavg();
3645 /* The queue_only configuration option can be overridden by -odx on the command
3646 line, except that if queue_only_override is false, queue_only cannot be unset
3647 from the command line. */
3649 if (queue_only_set && (queue_only_override || arg_queue_only))
3650 queue_only = arg_queue_only;
3652 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3655 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3656 if (arg_smtp_receive_timeout >= 0)
3657 smtp_receive_timeout = arg_smtp_receive_timeout;
3659 /* If Exim was started with root privilege, unless we have already removed the
3660 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3661 except when starting the daemon or doing some kind of delivery or address
3662 testing (-bt). These are the only cases when root need to be retained. We run
3663 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3664 retained only for starting the daemon. We always do the initgroups() in this
3665 situation (controlled by the TRUE below), in order to be as close as possible
3666 to the state Exim usually runs in. */
3668 if (!unprivileged && /* originally had root AND */
3669 !removed_privilege && /* still got root AND */
3670 !daemon_listen && /* not starting the daemon */
3671 queue_interval <= 0 && /* (either kind of daemon) */
3673 deliver_drop_privilege || /* requested unprivileged */
3675 queue_interval < 0 && /* not running the queue */
3676 (msg_action_arg < 0 || /* and */
3677 msg_action != MSG_DELIVER) && /* not delivering and */
3678 (!checking || !address_test_mode) /* not address checking */
3682 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
3685 /* When we are retaining a privileged uid, we still change to the exim gid. */
3687 else setgid(exim_gid);
3689 /* Handle a request to list the delivery queue */
3693 set_process_info("listing the queue");
3694 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3698 /* Handle a request to count the delivery queue */
3702 set_process_info("counting the queue");
3707 /* Handle actions on specific messages, except for the force delivery and
3708 message load actions, which are done below. Some actions take a whole list of
3709 message ids, which are known to continue up to the end of the arguments. Others
3710 take a single message id and then operate on the recipients list. */
3712 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
3714 int yield = EXIT_SUCCESS;
3715 set_process_info("acting on specified messages");
3717 if (!one_msg_action)
3719 for (i = msg_action_arg; i < argc; i++)
3720 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3721 yield = EXIT_FAILURE;
3724 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3725 recipients_arg)) yield = EXIT_FAILURE;
3729 /* All the modes below here require the remaining configuration sections
3730 to be read, except that we can skip over the ACL setting when delivering
3731 specific messages, or doing a queue run. (For various testing cases we could
3732 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3735 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3737 /* The configuration data will have been read into POOL_PERM because we won't
3738 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3739 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3740 configuration were read into POOL_MAIN, because we don't do any resets till
3741 later on. However, it seems right, and it does ensure that both pools get used.
3744 store_pool = POOL_MAIN;
3746 /* Handle the -brt option. This is for checking out retry configurations.
3747 The next three arguments are a domain name or a complete address, and
3748 optionally two error numbers. All it does is to call the function that
3749 scans the retry configuration data. */
3751 if (test_retry_arg >= 0)
3753 retry_config *yield;
3754 int basic_errno = 0;
3758 if (test_retry_arg >= argc)
3760 printf("-brt needs a domain or address argument\n");
3761 exim_exit(EXIT_FAILURE);
3763 s1 = argv[test_retry_arg++];
3766 /* If the first argument contains no @ and no . it might be a local user
3767 or it might be a single-component name. Treat as a domain. */
3769 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3771 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3772 "being \ntreated as a one-component domain, not as a local part.\n\n",
3776 /* There may be an optional second domain arg. */
3778 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3779 s2 = argv[test_retry_arg++];
3781 /* The final arg is an error name */
3783 if (test_retry_arg < argc)
3785 uschar *ss = argv[test_retry_arg];
3787 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3790 printf("%s\n", CS error);
3791 return EXIT_FAILURE;
3794 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
3795 code > 100 as an error is for matching codes to the decade. Turn them into
3796 a real error code, off the decade. */
3798 if (basic_errno == ERRNO_MAIL4XX ||
3799 basic_errno == ERRNO_RCPT4XX ||
3800 basic_errno == ERRNO_DATA4XX)
3802 int code = (more_errno >> 8) & 255;
3804 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3805 else if (code > 100)
3806 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3810 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3811 if (yield == NULL) printf("No retry information found\n"); else
3814 more_errno = yield->more_errno;
3815 printf("Retry rule: %s ", yield->pattern);
3817 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3819 printf("quota%s%s ",
3820 (more_errno > 0)? "_" : "",
3821 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3823 else if (yield->basic_errno == ECONNREFUSED)
3825 printf("refused%s%s ",
3826 (more_errno > 0)? "_" : "",
3827 (more_errno == 'M')? "MX" :
3828 (more_errno == 'A')? "A" : "");
3830 else if (yield->basic_errno == ETIMEDOUT)
3833 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3835 if (more_errno != 0) printf("_%s",
3836 (more_errno == 'M')? "MX" : "A");
3839 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3840 printf("auth_failed ");
3843 for (r = yield->rules; r != NULL; r = r->next)
3845 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3846 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3852 printf(",%d.", x/1000);
3866 exim_exit(EXIT_SUCCESS);
3869 /* Handle a request to list one or more configuration options */
3873 set_process_info("listing variables");
3874 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3875 else for (i = recipients_arg; i < argc; i++)
3878 (Ustrcmp(argv[i], "router") == 0 ||
3879 Ustrcmp(argv[i], "transport") == 0 ||
3880 Ustrcmp(argv[i], "authenticator") == 0))
3882 readconf_print(argv[i+1], argv[i]);
3885 else readconf_print(argv[i], NULL);
3887 exim_exit(EXIT_SUCCESS);
3891 /* Handle a request to deliver one or more messages that are already on the
3892 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
3893 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
3895 Delivery of specific messages is typically used for a small number when
3896 prodding by hand (when the option forced_delivery will be set) or when
3897 re-execing to regain root privilege. Each message delivery must happen in a
3898 separate process, so we fork a process for each one, and run them sequentially
3899 so that debugging output doesn't get intertwined, and to avoid spawning too
3900 many processes if a long list is given. However, don't fork for the last one;
3901 this saves a process in the common case when Exim is called to deliver just one
3904 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
3906 if (prod_requires_admin && !admin_user)
3908 fprintf(stderr, "exim: Permission denied\n");
3909 exim_exit(EXIT_FAILURE);
3911 set_process_info("delivering specified messages");
3912 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3913 for (i = msg_action_arg; i < argc; i++)
3918 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3919 else if ((pid = fork()) == 0)
3921 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3922 _exit(EXIT_SUCCESS);
3926 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3928 exim_exit(EXIT_FAILURE);
3932 exim_exit(EXIT_SUCCESS);
3936 /* If only a single queue run is requested, without SMTP listening, we can just
3937 turn into a queue runner, with an optional starting message id. */
3939 if (queue_interval == 0 && !daemon_listen)
3941 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3942 (start_queue_run_id == NULL)? US"" : US" starting at ",
3943 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3944 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3945 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3946 set_process_info("running the queue (single queue run)");
3947 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3948 exim_exit(EXIT_SUCCESS);
3952 /* Find the login name of the real user running this process. This is always
3953 needed when receiving a message, because it is written into the spool file. It
3954 may also be used to construct a from: or a sender: header, and in this case we
3955 need the user's full name as well, so save a copy of it, checked for RFC822
3956 syntax and munged if necessary, if it hasn't previously been set by the -F
3957 argument. We may try to get the passwd entry more than once, in case NIS or
3958 other delays are in evidence. Save the home directory for use in filter testing
3963 if ((pw = getpwuid(real_uid)) != NULL)
3965 originator_login = string_copy(US pw->pw_name);
3966 originator_home = string_copy(US pw->pw_dir);
3968 /* If user name has not been set by -F, set it from the passwd entry
3969 unless -f has been used to set the sender address by a trusted user. */
3971 if (originator_name == NULL)
3973 if (sender_address == NULL ||
3974 (!trusted_caller && filter_test == FTEST_NONE))
3976 uschar *name = US pw->pw_gecos;
3977 uschar *amp = Ustrchr(name, '&');
3980 /* Most Unix specify that a '&' character in the gecos field is
3981 replaced by a copy of the login name, and some even specify that
3982 the first character should be upper cased, so that's what we do. */
3987 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3988 amp - name, name, &loffset, originator_login, amp + 1);
3989 buffer[loffset] = toupper(buffer[loffset]);
3993 /* If a pattern for matching the gecos field was supplied, apply
3994 it and then expand the name string. */
3996 if (gecos_pattern != NULL && gecos_name != NULL)
3999 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4001 if (regex_match_and_setup(re, name, 0, -1))
4003 uschar *new_name = expand_string(gecos_name);
4005 if (new_name != NULL)
4007 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4008 "gecos field \"%s\"\n", new_name, name);
4011 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4012 "\"%s\": %s\n", gecos_name, expand_string_message);
4014 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4015 "gecos field \"%s\"\n", gecos_pattern, name);
4016 store_free((void *)re);
4018 originator_name = string_copy(name);
4021 /* A trusted caller has used -f but not -F */
4023 else originator_name = US"";
4026 /* Break the retry loop */
4031 if (++i > finduser_retries) break;
4035 /* If we cannot get a user login, log the incident and give up, unless the
4036 configuration specifies something to use. When running in the test harness,
4037 any setting of unknown_login overrides the actual name. */
4039 if (originator_login == NULL || running_in_test_harness)
4041 if (unknown_login != NULL)
4043 originator_login = expand_string(unknown_login);
4044 if (originator_name == NULL && unknown_username != NULL)
4045 originator_name = expand_string(unknown_username);
4046 if (originator_name == NULL) originator_name = US"";
4048 if (originator_login == NULL)
4049 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4053 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4056 originator_name = string_copy(parse_fix_phrase(originator_name,
4057 Ustrlen(originator_name), big_buffer, big_buffer_size));
4059 /* If a message is created by this call of Exim, the uid/gid of its originator
4060 are those of the caller. These values are overridden if an existing message is
4061 read in from the spool. */
4063 originator_uid = real_uid;
4064 originator_gid = real_gid;
4066 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4067 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4069 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4070 returns. We leave this till here so that the originator_ fields are available
4071 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4074 if (daemon_listen || queue_interval > 0)
4078 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4079 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4080 "mua_wrapper is set");
4085 /* If the sender ident has not been set (by a trusted caller) set it to
4086 the caller. This will get overwritten below for an inetd call. If a trusted
4087 caller has set it empty, unset it. */
4089 if (sender_ident == NULL) sender_ident = originator_login;
4090 else if (sender_ident[0] == 0) sender_ident = NULL;
4092 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4093 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4094 originator_* variables set. */
4096 if (test_rewrite_arg >= 0)
4098 really_exim = FALSE;
4099 if (test_rewrite_arg >= argc)
4101 printf("-brw needs an address argument\n");
4102 exim_exit(EXIT_FAILURE);
4104 rewrite_test(argv[test_rewrite_arg]);
4105 exim_exit(EXIT_SUCCESS);
4108 /* A locally-supplied message is considered to be coming from a local user
4109 unless a trusted caller supplies a sender address with -f, or is passing in the
4110 message via SMTP (inetd invocation or otherwise). */
4112 if ((sender_address == NULL && !smtp_input) ||
4113 (!trusted_caller && filter_test == FTEST_NONE))
4115 sender_local = TRUE;
4117 /* A trusted caller can supply authenticated_sender and authenticated_id
4118 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4119 defaults except when host checking. */
4121 if (authenticated_sender == NULL && !host_checking)
4122 authenticated_sender = string_sprintf("%s@%s", originator_login,
4123 qualify_domain_sender);
4124 if (authenticated_id == NULL && !host_checking)
4125 authenticated_id = originator_login;
4128 /* Trusted callers are always permitted to specify the sender address.
4129 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4130 is specified is the empty address. However, if a trusted caller does not
4131 specify a sender address for SMTP input, we leave sender_address unset. This
4132 causes the MAIL commands to be honoured. */
4134 if ((!smtp_input && sender_address == NULL) ||
4135 !receive_check_set_sender(sender_address))
4137 /* Either the caller is not permitted to set a general sender, or this is
4138 non-SMTP input and the trusted caller has not set a sender. If there is no
4139 sender, or if a sender other than <> is set, override with the originator's
4140 login (which will get qualified below), except when checking things. */
4142 if (sender_address == NULL /* No sender_address set */
4144 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4145 !checking && /* Not running tests, AND */
4146 filter_test == FTEST_NONE)) /* Not testing a filter */
4148 sender_address = originator_login;
4149 sender_address_forced = FALSE;
4150 sender_address_domain = 0;
4154 /* Remember whether an untrusted caller set the sender address */
4156 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
4158 /* Ensure that the sender address is fully qualified unless it is the empty
4159 address, which indicates an error message, or doesn't exist (root caller, smtp
4160 interface, no -f argument). */
4162 if (sender_address != NULL && sender_address[0] != 0 &&
4163 sender_address_domain == 0)
4164 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4165 qualify_domain_sender);
4167 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4169 /* Handle a request to verify a list of addresses, or test them for delivery.
4170 This must follow the setting of the sender address, since routers can be
4171 predicated upon the sender. If no arguments are given, read addresses from
4172 stdin. Set debug_level to at least D_v to get full output for address testing.
4175 if (verify_address_mode || address_test_mode)
4178 int flags = vopt_qualify;
4180 if (verify_address_mode)
4182 if (!verify_as_sender) flags |= vopt_is_recipient;
4183 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4188 flags |= vopt_is_recipient;
4189 debug_selector |= D_v;
4190 debug_file = stderr;
4191 debug_fd = fileno(debug_file);
4192 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4195 if (recipients_arg < argc)
4197 while (recipients_arg < argc)
4199 uschar *s = argv[recipients_arg++];
4202 BOOL finished = FALSE;
4203 uschar *ss = parse_find_address_end(s, FALSE);
4204 if (*ss == ',') *ss = 0; else finished = TRUE;
4205 test_address(s, flags, &exit_value);
4208 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4215 uschar *s = get_stdinput(NULL, NULL);
4216 if (s == NULL) break;
4217 test_address(s, flags, &exit_value);
4221 exim_exit(exit_value);
4224 /* Handle expansion checking. Either expand items on the command line, or read
4225 from stdin if there aren't any. If -Mset was specified, load the message so
4226 that its variables can be used, but restrict this facility to admin users.
4227 Otherwise, if -bem was used, read a message from stdin. */
4231 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4233 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4236 fprintf(stderr, "exim: permission denied\n");
4239 message_id = argv[msg_action_arg];
4240 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4241 if (!spool_open_datafile(message_id))
4242 printf ("Failed to load message datafile %s\n", message_id);
4243 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4244 printf ("Failed to load message %s\n", message_id);
4247 /* Read a test message from a file. We fudge it up to be on stdin, saving
4248 stdin itself for later reading of expansion strings. */
4250 else if (expansion_test_message != NULL)
4252 int save_stdin = dup(0);
4253 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4256 fprintf(stderr, "exim: failed to open %s: %s\n", expansion_test_message,
4258 return EXIT_FAILURE;
4261 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4262 message_ended = END_NOTENDED;
4263 read_message_body(receive_msg(extract_recipients));
4264 message_linecount += body_linecount;
4265 (void)dup2(save_stdin, 0);
4266 (void)close(save_stdin);
4267 clearerr(stdin); /* Required by Darwin */
4270 /* Allow $recipients for this testing */
4272 enable_dollar_recipients = TRUE;
4274 /* Expand command line items */
4276 if (recipients_arg < argc)
4278 while (recipients_arg < argc)
4280 uschar *s = argv[recipients_arg++];
4281 uschar *ss = expand_string(s);
4282 if (ss == NULL) printf ("Failed: %s\n", expand_string_message);
4283 else printf("%s\n", CS ss);
4291 char *(*fn_readline)(char *) = NULL;
4292 char *(*fn_addhist)(char *) = NULL;
4295 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4301 uschar *source = get_stdinput(fn_readline, fn_addhist);
4302 if (source == NULL) break;
4303 ss = expand_string(source);
4305 printf ("Failed: %s\n", expand_string_message);
4306 else printf("%s\n", CS ss);
4310 if (dlhandle != NULL) dlclose(dlhandle);
4314 /* The data file will be open after -Mset */
4316 if (deliver_datafile >= 0)
4318 (void)close(deliver_datafile);
4319 deliver_datafile = -1;
4322 exim_exit(EXIT_SUCCESS);
4326 /* The active host name is normally the primary host name, but it can be varied
4327 for hosts that want to play several parts at once. We need to ensure that it is
4328 set for host checking, and for receiving messages. */
4330 smtp_active_hostname = primary_hostname;
4331 if (raw_active_hostname != NULL)
4333 uschar *nah = expand_string(raw_active_hostname);
4336 if (!expand_string_forcedfail)
4337 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4338 "(smtp_active_hostname): %s", raw_active_hostname,
4339 expand_string_message);
4341 else if (nah[0] != 0) smtp_active_hostname = nah;
4344 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4345 given IP address so that the blocking and relay configuration can be tested.
4346 Unless a sender_ident was set by -oMt, we discard it (the default is the
4347 caller's login name). An RFC 1413 call is made only if we are running in the
4348 test harness and an incoming interface and both ports are specified, because
4349 there is no TCP/IP call to find the ident for. */
4356 if (!sender_ident_set)
4358 sender_ident = NULL;
4359 if (running_in_test_harness && sender_host_port != 0 &&
4360 interface_address != NULL && interface_port != 0)
4361 verify_get_ident(1413);
4364 /* In case the given address is a non-canonical IPv6 address, canonicize
4365 it. The code works for both IPv4 and IPv6, as it happens. */
4367 size = host_aton(sender_host_address, x);
4368 sender_host_address = store_get(48); /* large enough for full IPv6 */
4369 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4371 /* Now set up for testing */
4373 host_build_sender_fullhost();
4377 sender_local = FALSE;
4378 sender_host_notsocket = TRUE;
4379 debug_file = stderr;
4380 debug_fd = fileno(debug_file);
4381 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4382 "**** but without any ident (RFC 1413) callback.\n"
4383 "**** This is not for real!\n\n",
4384 sender_host_address);
4386 if (verify_check_host(&hosts_connection_nolog) == OK)
4387 log_write_selector &= ~L_smtp_connection;
4388 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4390 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4391 because a log line has already been written for all its failure exists
4392 (usually "connection refused: <reason>") and writing another one is
4393 unnecessary clutter. */
4395 if (smtp_start_session())
4397 reset_point = store_get(0);
4400 store_reset(reset_point);
4401 if (smtp_setup_msg() <= 0) break;
4402 if (!receive_msg(FALSE)) break;
4406 exim_exit(EXIT_SUCCESS);
4410 /* Arrange for message reception if recipients or SMTP were specified;
4411 otherwise complain unless a version print (-bV) happened or this is a filter
4412 verification test. In the former case, show the configuration file name. */
4414 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4416 if (version_printed)
4418 printf("Configuration file is %s\n", config_main_filename);
4419 return EXIT_SUCCESS;
4421 if (filter_test == FTEST_NONE)
4424 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4425 "not directly from a shell command line. Options and/or arguments control\n"
4426 "what it does when called. For a list of options, see the Exim documentation.\n");
4427 return EXIT_FAILURE;
4432 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4433 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4434 that we are not called from inetd, because that is rejected above. The
4435 following configuration settings are forced here:
4437 (1) Synchronous delivery (-odi)
4438 (2) Errors to stderr (-oep == -oeq)
4439 (3) No parallel remote delivery
4440 (4) Unprivileged delivery
4442 We don't force overall queueing options because there are several of them;
4443 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4444 to override any SMTP queueing. */
4448 synchronous_delivery = TRUE;
4449 arg_error_handling = ERRORS_STDERR;
4450 remote_max_parallel = 1;
4451 deliver_drop_privilege = TRUE;
4453 queue_smtp_domains = NULL;
4457 /* Prepare to accept one or more new messages on the standard input. When a
4458 message has been read, its id is returned in message_id[]. If doing immediate
4459 delivery, we fork a delivery process for each received message, except for the
4460 last one, where we can save a process switch.
4462 It is only in non-smtp mode that error_handling is allowed to be changed from
4463 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4464 sendmail error modes other than -oem ever actually used? Later: yes.) */
4466 if (!smtp_input) error_handling = arg_error_handling;
4468 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4469 logging being sent down the socket and make an identd call to get the
4474 (void)fclose(stderr);
4475 exim_nullstd(); /* Re-open to /dev/null */
4476 verify_get_ident(IDENT_PORT);
4477 host_build_sender_fullhost();
4478 set_process_info("handling incoming connection from %s via inetd",
4482 /* If the sender host address has been set, build sender_fullhost if it hasn't
4483 already been done (which it will have been for inetd). This caters for the
4484 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4485 so that the test for IP options is skipped for -bs input. */
4487 if (sender_host_address != NULL && sender_fullhost == NULL)
4489 host_build_sender_fullhost();
4490 set_process_info("handling incoming connection from %s via -oMa",
4492 sender_host_notsocket = TRUE;
4495 /* Otherwise, set the sender host as unknown except for inetd calls. This
4496 prevents host checking in the case of -bs not from inetd and also for -bS. */
4498 else if (!is_inetd) sender_host_unknown = TRUE;
4500 /* If stdout does not exist, then dup stdin to stdout. This can happen
4501 if exim is started from inetd. In this case fd 0 will be set to the socket,
4502 but fd 1 will not be set. This also happens for passed SMTP channels. */
4504 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
4506 /* Set up the incoming protocol name and the state of the program. Root is
4507 allowed to force received protocol via the -oMr option above. If we have come
4508 via inetd, the process info has already been set up. We don't set
4509 received_protocol here for smtp input, as it varies according to
4510 batch/HELO/EHLO/AUTH/TLS. */
4514 if (!is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
4515 smtp_batched_input? "batched " : "",
4516 (sender_address!= NULL)? sender_address : originator_login);
4520 if (received_protocol == NULL)
4521 received_protocol = string_sprintf("local%s", called_as);
4522 set_process_info("accepting a local non-SMTP message from <%s>",
4526 /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is
4530 local_queue_only = queue_only;
4532 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4533 the spool if so configured. On failure, we must not attempt to send an error
4534 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4535 error code is given.) */
4537 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4539 fprintf(stderr, "exim: insufficient disk space\n");
4540 return EXIT_FAILURE;
4543 /* If this is smtp input of any kind, real or batched, handle the start of the
4546 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
4547 because a log line has already been written for all its failure exists
4548 (usually "connection refused: <reason>") and writing another one is
4549 unnecessary clutter. */
4555 if (verify_check_host(&hosts_connection_nolog) == OK)
4556 log_write_selector &= ~L_smtp_connection;
4557 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4558 if (!smtp_start_session())
4561 exim_exit(EXIT_SUCCESS);
4565 /* Otherwise, set up the input size limit here. */
4569 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
4570 if (expand_string_message != NULL)
4572 if (thismessage_size_limit == -1)
4573 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4574 "message_size_limit: %s", expand_string_message);
4576 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4577 "message_size_limit: %s", expand_string_message);
4581 /* Loop for several messages when reading SMTP input. If we fork any child
4582 processes, we don't want to wait for them unless synchronous delivery is
4583 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4584 same as SIG_DFL, despite the fact that documentation often lists the default as
4585 "ignore". This is a confusing area. This is what I know:
4587 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4588 processes that complete simply to go away without ever becoming defunct. You
4589 can't then wait for them - but we don't want to wait for them in the
4590 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4591 happen for all OS (e.g. *BSD is different).
4593 But that's not the end of the story. Some (many? all?) systems have the
4594 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4595 has by default, so it seems that the difference is merely one of default
4596 (compare restarting vs non-restarting signals).
4598 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4599 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4600 of the loop below. Paranoia rules.
4602 February 2003: That's *still* not the end of the story. There are now versions
4603 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4604 process then calls waitpid(), a grumble is written to the system log, because
4605 this is logically inconsistent. In other words, it doesn't like the paranoia.
4606 As a consequenc of this, the waitpid() below is now excluded if we are sure
4607 that SIG_IGN works. */
4609 if (!synchronous_delivery)
4612 struct sigaction act;
4613 act.sa_handler = SIG_IGN;
4614 sigemptyset(&(act.sa_mask));
4615 act.sa_flags = SA_NOCLDWAIT;
4616 sigaction(SIGCHLD, &act, NULL);
4618 signal(SIGCHLD, SIG_IGN);
4622 /* Save the current store pool point, for resetting at the start of
4623 each message, and save the real sender address, if any. */
4625 reset_point = store_get(0);
4626 real_sender_address = sender_address;
4628 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4629 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4634 store_reset(reset_point);
4637 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
4638 input and build the recipients list, before calling receive_msg() to read the
4639 message proper. Whatever sender address is given in the SMTP transaction is
4640 often ignored for local senders - we use the actual sender, which is normally
4641 either the underlying user running this process or a -f argument provided by
4642 a trusted caller. It is saved in real_sender_address. The test for whether to
4643 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
4648 if ((rc = smtp_setup_msg()) > 0)
4650 if (real_sender_address != NULL &&
4651 !receive_check_set_sender(sender_address))
4653 sender_address = raw_sender = real_sender_address;
4654 sender_address_unrewritten = NULL;
4657 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
4658 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
4659 the very end. The result of the ACL is ignored (as for other non-SMTP
4660 messages). It is run for its potential side effects. */
4662 if (smtp_batched_input && acl_not_smtp_start != NULL)
4664 uschar *user_msg, *log_msg;
4665 enable_dollar_recipients = TRUE;
4666 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4667 &user_msg, &log_msg);
4668 enable_dollar_recipients = FALSE;
4671 /* Now get the data for the message */
4673 more = receive_msg(extract_recipients);
4674 if (message_id[0] == 0)
4677 smtp_log_no_mail(); /* Log no mail if configured */
4678 exim_exit(EXIT_FAILURE);
4683 smtp_log_no_mail(); /* Log no mail if configured */
4684 exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4688 /* In the non-SMTP case, we have all the information from the command
4689 line, but must process it in case it is in the more general RFC822
4690 format, and in any case, to detect syntax errors. Also, it appears that
4691 the use of comma-separated lists as single arguments is common, so we
4692 had better support them. */
4698 int count = argc - recipients_arg;
4699 uschar **list = argv + recipients_arg;
4701 /* These options cannot be changed dynamically for non-SMTP messages */
4703 active_local_sender_retain = local_sender_retain;
4704 active_local_from_check = local_from_check;
4706 /* Save before any rewriting */
4708 raw_sender = string_copy(sender_address);
4710 /* Loop for each argument */
4712 for (i = 0; i < count; i++)
4714 int start, end, domain;
4716 uschar *s = list[i];
4718 /* Loop for each comma-separated address */
4722 BOOL finished = FALSE;
4724 uschar *ss = parse_find_address_end(s, FALSE);
4726 if (*ss == ',') *ss = 0; else finished = TRUE;
4728 /* Check max recipients - if -t was used, these aren't recipients */
4730 if (recipients_max > 0 && ++rcount > recipients_max &&
4731 !extract_recipients)
4733 if (error_handling == ERRORS_STDERR)
4735 fprintf(stderr, "exim: too many recipients\n");
4736 exim_exit(EXIT_FAILURE);
4741 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4742 errors_sender_rc : EXIT_FAILURE;
4747 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4749 if (domain == 0 && !allow_unqualified_recipient)
4752 errmess = US"unqualified recipient address not allowed";
4755 if (recipient == NULL)
4757 if (error_handling == ERRORS_STDERR)
4759 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4760 string_printing(list[i]), errmess);
4761 exim_exit(EXIT_FAILURE);
4767 eblock.text1 = string_printing(list[i]);
4768 eblock.text2 = errmess;
4770 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4771 errors_sender_rc : EXIT_FAILURE;
4775 receive_add_recipient(recipient, -1);
4778 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4782 /* Show the recipients when debugging */
4787 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4788 if (recipients_list != NULL)
4790 debug_printf("Recipients:\n");
4791 for (i = 0; i < recipients_count; i++)
4792 debug_printf(" %s\n", recipients_list[i].address);
4796 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
4797 ignored; rejecting here would just add complication, and it can just as
4798 well be done later. Allow $recipients to be visible in the ACL. */
4800 if (acl_not_smtp_start != NULL)
4802 uschar *user_msg, *log_msg;
4803 enable_dollar_recipients = TRUE;
4804 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
4805 &user_msg, &log_msg);
4806 enable_dollar_recipients = FALSE;
4809 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4810 will just read the headers for the message, and not write anything onto the
4813 message_ended = END_NOTENDED;
4814 more = receive_msg(extract_recipients);
4816 /* more is always FALSE here (not SMTP message) when reading a message
4817 for real; when reading the headers of a message for filter testing,
4818 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4820 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4821 } /* Non-SMTP message reception */
4823 /* If this is a filter testing run, there are headers in store, but
4824 no message on the spool. Run the filtering code in testing mode, setting
4825 the domain to the qualify domain and the local part to the current user,
4826 unless they have been set by options. The prefix and suffix are left unset
4827 unless specified. The the return path is set to to the sender unless it has
4828 already been set from a return-path header in the message. */
4830 if (filter_test != FTEST_NONE)
4832 deliver_domain = (ftest_domain != NULL)?
4833 ftest_domain : qualify_domain_recipient;
4834 deliver_domain_orig = deliver_domain;
4835 deliver_localpart = (ftest_localpart != NULL)?
4836 ftest_localpart : originator_login;
4837 deliver_localpart_orig = deliver_localpart;
4838 deliver_localpart_prefix = ftest_prefix;
4839 deliver_localpart_suffix = ftest_suffix;
4840 deliver_home = originator_home;
4842 if (return_path == NULL)
4844 printf("Return-path copied from sender\n");
4845 return_path = string_copy(sender_address);
4849 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4851 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4853 receive_add_recipient(
4854 string_sprintf("%s%s%s@%s",
4855 (ftest_prefix == NULL)? US"" : ftest_prefix,
4857 (ftest_suffix == NULL)? US"" : ftest_suffix,
4858 deliver_domain), -1);
4860 printf("Recipient = %s\n", recipients_list[0].address);
4861 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4862 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4864 (void)chdir("/"); /* Get away from wherever the user is running this from */
4866 /* Now we run either a system filter test, or a user filter test, or both.
4867 In the latter case, headers added by the system filter will persist and be
4868 available to the user filter. We need to copy the filter variables
4871 if ((filter_test & FTEST_SYSTEM) != 0)
4873 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4874 exim_exit(EXIT_FAILURE);
4877 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4879 if ((filter_test & FTEST_USER) != 0)
4881 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4882 exim_exit(EXIT_FAILURE);
4885 exim_exit(EXIT_SUCCESS);
4888 /* Else act on the result of message reception. We should not get here unless
4889 message_id[0] is non-zero. If queue_only is set, local_queue_only will be
4890 TRUE. If it is not, check on the number of messages received in this
4891 connection. If that's OK and queue_only_load is set, check that the load
4892 average is below it. If it is not, set local_queue_only TRUE. Note that it
4893 then remains this way for any subsequent messages on the same SMTP connection.
4894 This is a deliberate choice; even though the load average may fall, it
4895 doesn't seem right to deliver later messages on the same call when not
4896 delivering earlier ones. */
4898 if (!local_queue_only)
4900 if (smtp_accept_queue_per_connection > 0 &&
4901 receive_messagecount > smtp_accept_queue_per_connection)
4903 local_queue_only = TRUE;
4904 queue_only_reason = 2;
4906 else if (queue_only_load >= 0)
4908 local_queue_only = (load_average = os_getloadavg()) > queue_only_load;
4909 if (local_queue_only) queue_only_reason = 3;
4913 /* If running as an MUA wrapper, all queueing options and freezing options
4917 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4919 /* Log the queueing here, when it will get a message id attached, but
4920 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4923 if (local_queue_only) switch(queue_only_reason)
4926 log_write(L_delay_delivery,
4927 LOG_MAIN, "no immediate delivery: more than %d messages "
4928 "received in one connection", smtp_accept_queue_per_connection);
4932 log_write(L_delay_delivery,
4933 LOG_MAIN, "no immediate delivery: load average %.2f",
4934 (double)load_average/1000.0);
4938 /* Else do the delivery unless the ACL or local_scan() called for queue only
4939 or froze the message. Always deliver in a separate process. A fork failure is
4940 not a disaster, as the delivery will eventually happen on a subsequent queue
4941 run. The search cache must be tidied before the fork, as the parent will
4942 do it before exiting. The child will trigger a lookup failure and
4943 thereby defer the delivery if it tries to use (for example) a cached ldap
4944 connection that the parent has called unbind on. */
4946 else if (!queue_only_policy && !deliver_freeze)
4951 if ((pid = fork()) == 0)
4954 close_unwanted(); /* Close unwanted file descriptors and TLS */
4955 exim_nullstd(); /* Ensure std{in,out,err} exist */
4957 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
4958 mode, deliver_drop_privilege is forced TRUE). */
4960 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
4962 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
4964 /* Control does not return here. */
4967 /* No need to re-exec */
4969 rc = deliver_message(message_id, FALSE, FALSE);
4971 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
4972 EXIT_SUCCESS : EXIT_FAILURE);
4977 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
4978 "process: %s", strerror(errno));
4981 /* In the parent, wait if synchronous delivery is required. This will
4982 always be the case in MUA wrapper mode. */
4984 else if (synchronous_delivery)
4987 while (wait(&status) != pid);
4988 if ((status & 0x00ff) != 0)
4989 log_write(0, LOG_MAIN|LOG_PANIC,
4990 "process %d crashed with signal %d while delivering %s",
4991 (int)pid, status & 0x00ff, message_id);
4992 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
4996 /* The loop will repeat if more is TRUE. If we do not know know that the OS
4997 automatically reaps children (see comments above the loop), clear away any
4998 finished subprocesses here, in case there are lots of messages coming in
4999 from the same source. */
5001 #ifndef SIG_IGN_WORKS
5002 while (waitpid(-1, NULL, WNOHANG) > 0);
5006 exim_exit(EXIT_SUCCESS); /* Never returns */
5007 return 0; /* To stop compiler warning */