1 /* $Cambridge: exim/src/src/exim.c,v 1.15 2005/03/08 15:32:02 tom Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2005 */
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 * Ensure stdin, stdout, and stderr exist *
380 *************************************************/
382 /* Some operating systems grumble if an exec() happens without a standard
383 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
384 file will be opened and will use these fd values, and then some other bit of
385 code will assume, for example, that it can write error messages to stderr.
386 This function ensures that fds 0, 1, and 2 are open if they do not already
387 exist, by connecting them to /dev/null.
389 This function is also used to ensure that std{in,out,err} exist at all times,
390 so that if any library that Exim calls tries to use them, it doesn't crash.
402 for (i = 0; i <= 2; i++)
404 if (fstat(i, &statbuf) < 0 && errno == EBADF)
406 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
407 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
408 string_open_failed(errno, "/dev/null"));
409 if (devnull != i) dup2(devnull, i);
412 if (devnull > 2) close(devnull);
418 /*************************************************
419 * Close unwanted file descriptors for delivery *
420 *************************************************/
422 /* This function is called from a new process that has been forked to deliver
423 an incoming message, either directly, or using exec.
425 We want any smtp input streams to be closed in this new process. However, it
426 has been observed that using fclose() here causes trouble. When reading in -bS
427 input, duplicate copies of messages have been seen. The files will be sharing a
428 file pointer with the parent process, and it seems that fclose() (at least on
429 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
430 least sometimes. Hence we go for closing the underlying file descriptors.
432 If TLS is active, we want to shut down the TLS library, but without molesting
433 the parent's SSL connection.
435 For delivery of a non-SMTP message, we want to close stdin and stdout (and
436 stderr unless debugging) because the calling process might have set them up as
437 pipes and be waiting for them to close before it waits for the submission
438 process to terminate. If they aren't closed, they hold up the calling process
439 until the initial delivery process finishes, which is not what we want.
441 Exception: We do want it for synchronous delivery!
443 And notwithstanding all the above, if D_resolver is set, implying resolver
444 debugging, leave stdout open, because that's where the resolver writes its
447 When we close stderr (which implies we've also closed stdout), we also get rid
448 of any controlling terminal.
460 tls_close(FALSE); /* Shut down the TLS library */
462 close(fileno(smtp_in));
463 close(fileno(smtp_out));
468 close(0); /* stdin */
469 if ((debug_selector & D_resolver) == 0) close(1); /* stdout */
470 if (debug_selector == 0) /* stderr */
472 if (!synchronous_delivery)
485 /*************************************************
487 *************************************************/
489 /* This function sets a new uid and gid permanently, optionally calling
490 initgroups() to set auxiliary groups. There are some special cases when running
491 Exim in unprivileged modes. In these situations the effective uid will not be
492 root; if we already have the right effective uid/gid, and don't need to
493 initialize any groups, leave things as they are.
498 igflag TRUE if initgroups() wanted
499 msg text to use in debugging output and failure log
501 Returns: nothing; bombs out on failure
505 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
507 uid_t euid = geteuid();
508 gid_t egid = getegid();
510 if (euid == root_uid || euid != uid || egid != gid || igflag)
512 /* At least one OS returns +1 for initgroups failure, so just check for
517 struct passwd *pw = getpwuid(uid);
520 if (initgroups(pw->pw_name, gid) != 0)
521 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
522 (long int)uid, strerror(errno));
524 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
525 "no passwd entry for uid=%ld", (long int)uid);
528 if (setgid(gid) < 0 || setuid(uid) < 0)
530 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
531 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
535 /* Debugging output included uid/gid and all groups */
540 gid_t group_list[NGROUPS_MAX];
541 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
542 (long int)geteuid(), (long int)getegid(), (long int)getpid());
543 group_count = getgroups(NGROUPS_MAX, group_list);
544 debug_printf(" auxiliary group list:");
548 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
550 else debug_printf(" <none>");
558 /*************************************************
560 *************************************************/
562 /* Exim exits via this function so that it always clears up any open
568 Returns: does not return
576 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
577 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
584 /*************************************************
585 * Extract port from host address *
586 *************************************************/
588 /* Called to extract the port from the values given to -oMa and -oMi.
589 It also checks the syntax of the address.
592 address the address, with possible port on the end
594 Returns: the port, or zero if there isn't one
595 bombs out on a syntax error
599 check_port(uschar *address)
601 int port = host_extract_port(address);
602 if (string_is_ip_address(address, NULL) == 0)
604 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
612 /*************************************************
613 * Test/verify an address *
614 *************************************************/
616 /* This function is called by the -bv and -bt code. It extracts a working
617 address from a full RFC 822 address. This isn't really necessary per se, but it
618 has the effect of collapsing source routes.
622 flags flag bits for verify_address()
623 exit_value to be set for failures
629 test_address(uschar *s, int flags, int *exit_value)
631 int start, end, domain;
632 uschar *parse_error = NULL;
633 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
637 fprintf(stdout, "syntax error: %s\n", parse_error);
642 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
643 -1, -1, NULL, NULL, NULL);
644 if (rc == FAIL) *exit_value = 2;
645 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
651 /*************************************************
652 * Decode bit settings for log/debug *
653 *************************************************/
655 /* This function decodes a string containing bit settings in the form of +name
656 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
657 also recognizes a numeric setting of the form =<number>, but this is not
658 intended for user use. It's an easy way for Exim to pass the debug settings
659 when it is re-exec'ed.
661 The log options are held in two unsigned ints (because there became too many
662 for one). The top bit in the table means "put in 2nd selector". This does not
663 yet apply to debug options, so the "=" facility sets only the first selector.
665 A bad value for a debug setting is treated as an unknown option - error message
666 to stderr and die. For log settings, which come from the configuration file,
667 we write to the log on the way out...
670 selector1 address of the first bit string
671 selector2 address of the second bit string, or NULL
672 string the configured string
673 options the table of option names
675 which "log" or "debug"
677 Returns: nothing on success - bomb out on failure
681 decode_bits(unsigned int *selector1, unsigned int *selector2, uschar *string,
682 bit_table *options, int count, uschar *which)
685 if (string == NULL) return;
689 char *end; /* Not uschar */
690 *selector1 = strtoul(CS string+1, &end, 0);
691 if (*end == 0) return;
692 errmsg = string_sprintf("malformed numeric %s_selector setting: %s", which,
697 /* Handle symbolic setting */
704 bit_table *start, *end;
706 while (isspace(*string)) string++;
707 if (*string == 0) return;
709 if (*string != '+' && *string != '-')
711 errmsg = string_sprintf("malformed %s_selector setting: "
712 "+ or - expected but found \"%s\"", which, string);
716 adding = *string++ == '+';
718 while (isalnum(*string) || *string == '_') string++;
722 end = options + count;
726 bit_table *middle = start + (end - start)/2;
727 int c = Ustrncmp(s, middle->name, len);
730 if (middle->name[len] != 0) c = -1; else
732 unsigned int bit = middle->bit;
733 unsigned int *selector;
735 /* The value with all bits set means "set all bits in both selectors"
736 in the case where two are being handled. However, the top bit in the
737 second selector is never set. */
739 if (bit == 0xffffffff)
741 *selector1 = adding? bit : 0;
742 if (selector2 != NULL) *selector2 = adding? 0x7fffffff : 0;
745 /* Otherwise, the 0x80000000 bit means "this value, without the top
746 bit, belongs in the second selector". */
750 if ((bit & 0x80000000) != 0)
752 selector = selector2;
755 else selector = selector1;
756 if (adding) *selector |= bit; else *selector &= ~bit;
758 break; /* Out of loop to match selector name */
761 if (c < 0) end = middle; else start = middle + 1;
762 } /* Loop to match selector name */
766 errmsg = string_sprintf("unknown %s_selector setting: %c%.*s", which,
767 adding? '+' : '-', len, s);
770 } /* Loop for selector names */
772 /* Handle disasters */
775 if (Ustrcmp(which, "debug") == 0)
777 fprintf(stderr, "exim: %s\n", errmsg);
780 else log_write(0, LOG_CONFIG|LOG_PANIC_DIE, "%s", errmsg);
785 /*************************************************
786 * Show supported features *
787 *************************************************/
789 /* This function is called for -bV and for -d to output the optional features
790 of the current Exim binary.
792 Arguments: a FILE for printing
797 show_whats_supported(FILE *f)
799 #ifdef DB_VERSION_STRING
800 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
801 #elif defined(BTREEVERSION) && defined(HASHVERSION)
803 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
805 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
807 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
808 fprintf(f, "Probably ndbm\n");
809 #elif defined(USE_TDB)
810 fprintf(f, "Using tdb\n");
813 fprintf(f, "Probably GDBM (native mode)\n");
815 fprintf(f, "Probably GDBM (compatibility mode)\n");
819 fprintf(f, "Support for:");
821 fprintf(f, " iconv()");
832 #ifdef USE_TCP_WRAPPERS
833 fprintf(f, " TCPwrappers");
837 fprintf(f, " GnuTLS");
839 fprintf(f, " OpenSSL");
842 #ifdef WITH_CONTENT_SCAN
843 fprintf(f, " Content_Scanning");
845 #ifdef WITH_OLD_DEMIME
846 fprintf(f, " Old_Demime");
848 #ifdef EXPERIMENTAL_SPF
849 fprintf(f, " Experimental_SPF");
851 #ifdef EXPERIMENTAL_SRS
852 fprintf(f, " Experimental_SRS");
854 #ifdef EXPERIMENTAL_BRIGHTMAIL
855 fprintf(f, " Experimental_Brightmail");
857 #ifdef EXPERIMENTAL_DOMAINKEYS
858 fprintf(f, " Experimental_DomainKeys");
862 fprintf(f, "Lookups:");
863 #ifdef LOOKUP_LSEARCH
864 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
870 fprintf(f, " dbm dbmnz");
873 fprintf(f, " dnsdb");
875 #ifdef LOOKUP_DSEARCH
876 fprintf(f, " dsearch");
879 fprintf(f, " ibase");
882 fprintf(f, " ldap ldapdn ldapm");
885 fprintf(f, " mysql");
888 fprintf(f, " nis nis0");
890 #ifdef LOOKUP_NISPLUS
891 fprintf(f, " nisplus");
894 fprintf(f, " oracle");
897 fprintf(f, " passwd");
900 fprintf(f, " pgsql");
903 fprintf(f, " testdb");
906 fprintf(f, " whoson");
910 fprintf(f, "Authenticators:");
912 fprintf(f, " cram_md5");
914 #ifdef AUTH_CYRUS_SASL
915 fprintf(f, " cyrus_sasl");
917 #ifdef AUTH_PLAINTEXT
918 fprintf(f, " plaintext");
925 fprintf(f, "Routers:");
927 fprintf(f, " accept");
929 #ifdef ROUTER_DNSLOOKUP
930 fprintf(f, " dnslookup");
932 #ifdef ROUTER_IPLITERAL
933 fprintf(f, " ipliteral");
935 #ifdef ROUTER_IPLOOKUP
936 fprintf(f, " iplookup");
938 #ifdef ROUTER_MANUALROUTE
939 fprintf(f, " manualroute");
941 #ifdef ROUTER_QUERYPROGRAM
942 fprintf(f, " queryprogram");
944 #ifdef ROUTER_REDIRECT
945 fprintf(f, " redirect");
949 fprintf(f, "Transports:");
950 #ifdef TRANSPORT_APPENDFILE
951 fprintf(f, " appendfile");
952 #ifdef SUPPORT_MAILDIR
953 fprintf(f, "/maildir");
955 #ifdef SUPPORT_MAILSTORE
956 fprintf(f, "/mailstore");
962 #ifdef TRANSPORT_AUTOREPLY
963 fprintf(f, " autoreply");
965 #ifdef TRANSPORT_LMTP
968 #ifdef TRANSPORT_PIPE
971 #ifdef TRANSPORT_SMTP
976 if (fixed_never_users[0] > 0)
979 fprintf(f, "Fixed never_users: ");
980 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
981 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
982 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
989 /*************************************************
990 * Quote a local part *
991 *************************************************/
993 /* This function is used when a sender address or a From: or Sender: header
994 line is being created from the caller's login, or from an authenticated_id. It
995 applies appropriate quoting rules for a local part.
997 Argument: the local part
998 Returns: the local part, quoted if necessary
1002 local_part_quote(uschar *lpart)
1004 BOOL needs_quote = FALSE;
1009 for (t = lpart; !needs_quote && *t != 0; t++)
1011 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1012 (*t != '.' || t == lpart || t[1] == 0);
1015 if (!needs_quote) return lpart;
1018 yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1022 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1025 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1028 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1029 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1030 yield = string_cat(yield, &size, &ptr, nq, 1);
1034 yield = string_cat(yield, &size, &ptr, US"\"", 1);
1042 /*************************************************
1043 * Load readline() functions *
1044 *************************************************/
1046 /* This function is called from testing executions that read data from stdin,
1047 but only when running as the calling user. Currently, only -be does this. The
1048 function loads the readline() function library and passes back the functions.
1049 On some systems, it needs the curses library, so load that too, but try without
1050 it if loading fails. All this functionality has to be requested at build time.
1053 fn_readline_ptr pointer to where to put the readline pointer
1054 fn_addhist_ptr pointer to where to put the addhistory function
1056 Returns: the dlopen handle or NULL on failure
1060 set_readline(char * (**fn_readline_ptr)(char *),
1061 char * (**fn_addhist_ptr)(char *))
1064 void *dlhandle_curses = dlopen("libcurses.so", RTLD_GLOBAL|RTLD_LAZY);
1066 dlhandle = dlopen("libreadline.so", RTLD_GLOBAL|RTLD_NOW);
1067 if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1069 if (dlhandle != NULL)
1071 *fn_readline_ptr = (char *(*)(char*))dlsym(dlhandle, "readline");
1072 *fn_addhist_ptr = (char *(*)(char*))dlsym(dlhandle, "add_history");
1076 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1085 /*************************************************
1086 * Get a line from stdin for testing things *
1087 *************************************************/
1089 /* This function is called when running tests that can take a number of lines
1090 of input (for example, -be and -bt). It handles continuations and trailing
1091 spaces. And prompting and a blank line output on eof. If readline() is in use,
1092 the arguments are non-NULL and provide the relevant functions.
1095 fn_readline readline function or NULL
1096 fn_addhist addhist function or NULL
1098 Returns: pointer to dynamic memory, or NULL at end of file
1102 get_stdinput(char *(*fn_readline)(char *), char *(*fn_addhist)(char *))
1107 uschar *yield = NULL;
1109 if (fn_readline == NULL) printf("> ");
1113 uschar buffer[1024];
1117 char *readline_line = NULL;
1118 if (fn_readline != NULL)
1120 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1121 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1122 p = US readline_line;
1127 /* readline() not in use */
1130 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1134 /* Handle the line */
1136 ss = p + (int)Ustrlen(p);
1137 while (ss > p && isspace(ss[-1])) ss--;
1141 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1144 yield = string_cat(yield, &size, &ptr, p, ss - p);
1147 if (fn_readline != NULL) free(readline_line);
1150 if (ss == p || yield[ptr-1] != '\\')
1158 if (yield == NULL) printf("\n");
1164 /*************************************************
1165 * Entry point and high-level code *
1166 *************************************************/
1168 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1169 the appropriate action. All the necessary functions are present in the one
1170 binary. I originally thought one should split it up, but it turns out that so
1171 much of the apparatus is needed in each chunk that one might as well just have
1172 it all available all the time, which then makes the coding easier as well.
1175 argc count of entries in argv
1176 argv argument strings, with argv[0] being the program name
1178 Returns: EXIT_SUCCESS if terminated successfully
1179 EXIT_FAILURE otherwise, except when a message has been sent
1180 to the sender, and -oee was given
1184 main(int argc, char **cargv)
1186 uschar **argv = USS cargv;
1187 int arg_receive_timeout = -1;
1188 int arg_smtp_receive_timeout = -1;
1189 int arg_error_handling = error_handling;
1190 int filter_sfd = -1;
1191 int filter_ufd = -1;
1194 int list_queue_option = 0;
1196 int msg_action_arg = -1;
1197 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1198 int queue_only_reason = 0;
1200 int perl_start_option = 0;
1202 int recipients_arg = argc;
1203 int sender_address_domain = 0;
1204 int test_retry_arg = -1;
1205 int test_rewrite_arg = -1;
1206 BOOL arg_queue_only = FALSE;
1207 BOOL bi_option = FALSE;
1208 BOOL checking = FALSE;
1209 BOOL count_queue = FALSE;
1210 BOOL expansion_test = FALSE;
1211 BOOL extract_recipients = FALSE;
1212 BOOL forced_delivery = FALSE;
1213 BOOL f_end_dot = FALSE;
1214 BOOL deliver_give_up = FALSE;
1215 BOOL list_queue = FALSE;
1216 BOOL list_options = FALSE;
1217 BOOL local_queue_only;
1219 BOOL one_msg_action = FALSE;
1220 BOOL queue_only_set = FALSE;
1221 BOOL receiving_message = TRUE;
1223 BOOL removed_privilege = FALSE;
1224 BOOL verify_address_mode = FALSE;
1225 BOOL verify_as_sender = FALSE;
1226 BOOL version_printed = FALSE;
1227 uschar *alias_arg = NULL;
1228 uschar *called_as = US"";
1229 uschar *start_queue_run_id = NULL;
1230 uschar *stop_queue_run_id = NULL;
1231 uschar *ftest_domain = NULL;
1232 uschar *ftest_localpart = NULL;
1233 uschar *ftest_prefix = NULL;
1234 uschar *ftest_suffix = NULL;
1235 uschar *real_sender_address;
1236 uschar *originator_home = US"/";
1240 struct stat statbuf;
1241 pid_t passed_qr_pid = (pid_t)0;
1242 int passed_qr_pipe = -1;
1243 gid_t group_list[NGROUPS_MAX];
1245 /* Possible options for -R and -S */
1247 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1249 /* Need to define this in case we need to change the environment in order
1250 to get rid of a bogus time zone. We have to make it char rather than uschar
1251 because some OS define it in /usr/include/unistd.h. */
1253 extern char **environ;
1255 /* If the Exim user and/or group and/or the configuration file owner/group were
1256 defined by ref:name at build time, we must now find the actual uid/gid values.
1257 This is a feature to make the lives of binary distributors easier. */
1259 #ifdef EXIM_USERNAME
1260 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1262 exim_gid = pw->pw_gid;
1266 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1272 #ifdef EXIM_GROUPNAME
1273 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1275 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1281 #ifdef CONFIGURE_OWNERNAME
1282 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1284 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1285 CONFIGURE_OWNERNAME);
1290 #ifdef CONFIGURE_GROUPNAME
1291 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1293 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1294 CONFIGURE_GROUPNAME);
1299 /* In the Cygwin environment, some initialization needs doing. It is fudged
1300 in by means of this macro. */
1306 /* Check a field which is patched when we are running Exim within its
1307 testing harness; do a fast initial check, and then the whole thing. */
1309 running_in_test_harness =
1310 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1312 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1313 at the start of a program; however, it seems that some environments do not
1314 follow this. A "strange" locale can affect the formatting of timestamps, so we
1317 setlocale(LC_ALL, "C");
1319 /* Set up the default handler for timing using alarm(). */
1321 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1323 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1324 because store_malloc writes a log entry on failure. */
1326 log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1327 if (log_buffer == NULL)
1329 fprintf(stderr, "exim: failed to get store for log buffer\n");
1333 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1334 NULL when the daemon is run and the file is closed. We have to use this
1335 indirection, because some systems don't allow writing to the variable "stderr".
1338 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1340 /* Arrange for the PCRE regex library to use our store functions. Note that
1341 the normal calls are actually macros that add additional arguments for
1342 debugging purposes so we have to assign specially constructed functions here.
1343 The default is to use store in the stacking pool, but this is overridden in the
1344 regex_must_compile() function. */
1346 pcre_malloc = function_store_get;
1347 pcre_free = function_dummy_free;
1349 /* Ensure there is a big buffer for temporary use in several places. It is put
1350 in malloc store so that it can be freed for enlargement if necessary. */
1352 big_buffer = store_malloc(big_buffer_size);
1354 /* Set up the handler for the data request signal, and set the initial
1355 descriptive text. */
1357 set_process_info("initializing");
1358 os_restarting_signal(SIGUSR1, usr1_handler);
1360 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1361 in the daemon code. For the rest of Exim's uses, we ignore it. */
1363 signal(SIGHUP, SIG_IGN);
1365 /* We don't want to die on pipe errors as the code is written to handle
1366 the write error instead. */
1368 signal(SIGPIPE, SIG_IGN);
1370 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1371 set to SIG_IGN. This causes subprocesses that complete before the parent
1372 process waits for them not to hang around, so when Exim calls wait(), nothing
1373 is there. The wait() code has been made robust against this, but let's ensure
1374 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1375 ending status. We use sigaction rather than plain signal() on those OS where
1376 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1377 problem on AIX with this.) */
1381 struct sigaction act;
1382 act.sa_handler = SIG_DFL;
1383 sigemptyset(&(act.sa_mask));
1385 sigaction(SIGCHLD, &act, NULL);
1388 signal(SIGCHLD, SIG_DFL);
1391 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1396 /* Set up the version number. Set up the leading 'E' for the external form of
1397 message ids, set the pointer to the internal form, and initialize it to
1398 indicate no message being processed. */
1401 message_id_option[0] = '-';
1402 message_id_external = message_id_option + 1;
1403 message_id_external[0] = 'E';
1404 message_id = message_id_external + 1;
1407 /* Set the umask to zero so that any files that Exim creates are created
1408 with the modes that it specifies. */
1412 /* Precompile the regular expression for matching a message id. Keep this in
1413 step with the code that generates ids in the accept.c module. We need to do
1414 this here, because the -M options check their arguments for syntactic validity
1415 using mac_ismsgid, which uses this. */
1418 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1420 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1421 this seems to be a generally accepted convention, since one finds symbolic
1422 links called "mailq" in standard OS configurations. */
1424 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1425 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1428 receiving_message = FALSE;
1429 called_as = US"-mailq";
1432 /* If the program is called as "rmail" treat it as equivalent to
1433 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1434 i.e. preventing a single dot on a line from terminating the message, and
1435 returning with zero return code, even in cases of error (provided an error
1436 message has been sent). */
1438 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1439 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1442 called_as = US"-rmail";
1443 errors_sender_rc = EXIT_SUCCESS;
1446 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1447 this is a smail convention. */
1449 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1450 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1452 smtp_input = smtp_batched_input = TRUE;
1453 called_as = US"-rsmtp";
1456 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1457 this is a smail convention. */
1459 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1460 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1463 receiving_message = FALSE;
1464 called_as = US"-runq";
1467 /* If the program is called as "newaliases" treat it as equivalent to
1468 "exim -bi"; this is a sendmail convention. */
1470 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1471 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1474 receiving_message = FALSE;
1475 called_as = US"-newaliases";
1478 /* Save the original effective uid for a couple of uses later. It should
1479 normally be root, but in some esoteric environments it may not be. */
1481 original_euid = geteuid();
1483 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1484 to be the same as the real ones. This makes a difference only if Exim is setuid
1485 (or setgid) to something other than root, which could be the case in some
1486 special configurations. */
1488 real_uid = getuid();
1489 real_gid = getgid();
1491 if (real_uid == root_uid)
1497 /* If neither the original real uid nor the original euid was root, Exim is
1498 running in an unprivileged state. */
1500 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1502 /* If the first argument is --help, pretend there are no arguments. This will
1503 cause a brief message to be given. */
1505 if (argc > 1 && Ustrcmp(argv[1], "--help") == 0) argc = 1;
1507 /* Scan the program's arguments. Some can be dealt with right away; others are
1508 simply recorded for checking and handling afterwards. Do a high-level switch
1509 on the second character (the one after '-'), to save some effort. */
1511 for (i = 1; i < argc; i++)
1513 BOOL badarg = FALSE;
1514 uschar *arg = argv[i];
1518 /* An argument not starting with '-' is the start of a recipients list;
1519 break out of the options-scanning loop. */
1527 /* An option consistion of -- terminates the options */
1529 if (Ustrcmp(arg, "--") == 0)
1531 recipients_arg = i + 1;
1535 /* Handle flagged options */
1537 switchchar = arg[1];
1540 /* Make all -ex options synonymous with -oex arguments, since that
1541 is assumed by various callers. Also make -qR options synonymous with -R
1542 options, as that seems to be required as well. Allow for -qqR too, and
1543 the same for -S options. */
1545 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1546 Ustrncmp(arg+1, "qR", 2) == 0 ||
1547 Ustrncmp(arg+1, "qS", 2) == 0)
1549 switchchar = arg[2];
1552 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1554 switchchar = arg[3];
1556 queue_2stage = TRUE;
1559 /* Make -r synonymous with -f, since it is a documented alias */
1561 else if (arg[1] == 'r') switchchar = 'f';
1563 /* Make -ov synonymous with -v */
1565 else if (Ustrcmp(arg, "-ov") == 0)
1571 /* High-level switch on active initial letter */
1575 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1576 so has no need of it. */
1579 if (*argrest == 0) i++; /* Skip over the type */
1584 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1586 /* -bd: Run in daemon mode, awaiting SMTP connections.
1587 -bdf: Ditto, but in the foreground.
1590 if (*argrest == 'd')
1592 daemon_listen = TRUE;
1593 if (*(++argrest) == 'f') background_daemon = FALSE;
1594 else if (*argrest != 0) { badarg = TRUE; break; }
1597 /* -be: Run in expansion test mode */
1599 else if (*argrest == 'e')
1600 expansion_test = checking = TRUE;
1602 /* -bF: Run system filter test */
1604 else if (*argrest == 'F')
1606 filter_test |= FTEST_SYSTEM;
1607 if (*(++argrest) != 0) { badarg = TRUE; break; }
1608 if (++i < argc) filter_test_sfile = argv[i]; else
1610 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1615 /* -bf: Run user filter test
1616 -bfd: Set domain for filter testing
1617 -bfl: Set local part for filter testing
1618 -bfp: Set prefix for filter testing
1619 -bfs: Set suffix for filter testing
1622 else if (*argrest == 'f')
1624 if (*(++argrest) == 0)
1626 filter_test |= FTEST_USER;
1627 if (++i < argc) filter_test_ufile = argv[i]; else
1629 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
1637 fprintf(stderr, "exim: string expected after %s\n", arg);
1640 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
1641 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
1642 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
1643 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
1644 else { badarg = TRUE; break; }
1648 /* -bh: Host checking - an IP address must follow. */
1650 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
1652 if (++i >= argc) { badarg = TRUE; break; }
1653 sender_host_address = argv[i];
1654 host_checking = checking = log_testing_mode = TRUE;
1655 host_checking_callout = argrest[1] == 'c';
1658 /* -bi: This option is used by sendmail to initialize *the* alias file,
1659 though it has the -oA option to specify a different file. Exim has no
1660 concept of *the* alias file, but since Sun's YP make script calls
1661 sendmail this way, some support must be provided. */
1663 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
1665 /* -bm: Accept and deliver message - the default option. Reinstate
1666 receiving_message, which got turned off for all -b options. */
1668 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
1670 /* -bnq: For locally originating messages, do not qualify unqualified
1671 addresses. In the envelope, this causes errors; in header lines they
1674 else if (Ustrcmp(argrest, "nq") == 0)
1676 allow_unqualified_sender = FALSE;
1677 allow_unqualified_recipient = FALSE;
1680 /* -bpxx: List the contents of the mail queue, in various forms. If
1681 the option is -bpc, just a queue count is needed. Otherwise, if the
1682 first letter after p is r, then order is random. */
1684 else if (*argrest == 'p')
1686 if (*(++argrest) == 'c')
1689 if (*(++argrest) != 0) badarg = TRUE;
1693 if (*argrest == 'r')
1695 list_queue_option = 8;
1698 else list_queue_option = 0;
1702 /* -bp: List the contents of the mail queue, top-level only */
1704 if (*argrest == 0) {}
1706 /* -bpu: List the contents of the mail queue, top-level undelivered */
1708 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
1710 /* -bpa: List the contents of the mail queue, including all delivered */
1712 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
1714 /* Unknown after -bp[r] */
1724 /* -bP: List the configuration variables given as the address list.
1725 Force -v, so configuration errors get displayed. */
1727 else if (Ustrcmp(argrest, "P") == 0)
1729 list_options = TRUE;
1730 debug_selector |= D_v;
1731 debug_file = stderr;
1734 /* -brt: Test retry configuration lookup */
1736 else if (Ustrcmp(argrest, "rt") == 0)
1738 test_retry_arg = i + 1;
1742 /* -brw: Test rewrite configuration */
1744 else if (Ustrcmp(argrest, "rw") == 0)
1746 test_rewrite_arg = i + 1;
1750 /* -bS: Read SMTP commands on standard input, but produce no replies -
1751 all errors are reported by sending messages. */
1753 else if (Ustrcmp(argrest, "S") == 0)
1754 smtp_input = smtp_batched_input = receiving_message = TRUE;
1756 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1757 on standard output. */
1759 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
1761 /* -bt: address testing mode */
1763 else if (Ustrcmp(argrest, "t") == 0)
1764 address_test_mode = checking = log_testing_mode = TRUE;
1766 /* -bv: verify addresses */
1768 else if (Ustrcmp(argrest, "v") == 0)
1769 verify_address_mode = checking = log_testing_mode = TRUE;
1771 /* -bvs: verify sender addresses */
1773 else if (Ustrcmp(argrest, "vs") == 0)
1775 verify_address_mode = checking = log_testing_mode = TRUE;
1776 verify_as_sender = TRUE;
1779 /* -bV: Print version string and support details */
1781 else if (Ustrcmp(argrest, "V") == 0)
1783 printf("Exim version %s #%s built %s\n", version_string,
1784 version_cnumber, version_date);
1785 printf("%s\n", CS version_copyright);
1786 version_printed = TRUE;
1787 show_whats_supported(stdout);
1794 /* -C: change configuration file list; ignore if it isn't really
1795 a change! Enforce a prefix check if required. */
1800 if(++i < argc) argrest = argv[i]; else
1801 { badarg = TRUE; break; }
1803 if (Ustrcmp(config_main_filelist, argrest) != 0)
1805 #ifdef ALT_CONFIG_PREFIX
1807 int len = Ustrlen(ALT_CONFIG_PREFIX);
1808 uschar *list = argrest;
1810 while((filename = string_nextinlist(&list, &sep, big_buffer,
1811 big_buffer_size)) != NULL)
1813 if ((Ustrlen(filename) < len ||
1814 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
1815 Ustrstr(filename, "/../") != NULL) &&
1816 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
1818 fprintf(stderr, "-C Permission denied\n");
1824 config_main_filelist = argrest;
1825 config_changed = TRUE;
1830 /* -D: set up a macro definition */
1833 #ifdef DISABLE_D_OPTION
1834 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
1839 macro_item *mlast = NULL;
1842 uschar *s = argrest;
1844 while (isspace(*s)) s++;
1846 if (*s < 'A' || *s > 'Z')
1848 fprintf(stderr, "exim: macro name set by -D must start with "
1849 "an upper case letter\n");
1853 while (isalnum(*s) || *s == '_')
1855 if (ptr < sizeof(name)-1) name[ptr++] = *s;
1859 if (ptr == 0) { badarg = TRUE; break; }
1860 while (isspace(*s)) s++;
1863 if (*s++ != '=') { badarg = TRUE; break; }
1864 while (isspace(*s)) s++;
1867 for (m = macros; m != NULL; m = m->next)
1869 if (Ustrcmp(m->name, name) == 0)
1871 fprintf(stderr, "exim: duplicated -D in command line\n");
1877 m = store_get(sizeof(macro_item) + Ustrlen(name));
1879 m->command_line = TRUE;
1880 if (mlast == NULL) macros = m; else mlast->next = m;
1881 Ustrcpy(m->name, name);
1882 m->replacement = string_copy(s);
1884 if (clmacro_count >= MAX_CLMACROS)
1886 fprintf(stderr, "exim: too many -D options on command line\n");
1889 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
1895 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1896 The latter is now a no-op, retained for compatibility only. If -dd is used,
1897 debugging subprocesses of the daemon is disabled. */
1900 if (Ustrcmp(argrest, "ropcr") == 0)
1902 /* drop_cr = TRUE; */
1905 /* Use an intermediate variable so that we don't set debugging while
1906 decoding the debugging bits. */
1910 unsigned int selector = D_default;
1913 if (*argrest == 'd')
1915 debug_daemon = TRUE;
1919 decode_bits(&selector, NULL, argrest, debug_options,
1920 debug_options_count, US"debug");
1921 debug_selector = selector;
1926 /* -E: This is a local error message. This option is not intended for
1927 external use at all, but is not restricted to trusted callers because it
1928 does no harm (just suppresses certain error messages) and if Exim is run
1929 not setuid root it won't always be trusted when it generates error
1930 messages using this option. If there is a message id following -E, point
1931 message_reference at it, for logging. */
1934 local_error_message = TRUE;
1935 if (mac_ismsgid(argrest)) message_reference = argrest;
1939 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1940 option, so it looks as if historically the -oex options are also callable
1941 without the leading -o. So we have to accept them. Before the switch,
1942 anything starting -oe has been converted to -e. Exim does not support all
1943 of the sendmail error options. */
1946 if (Ustrcmp(argrest, "e") == 0)
1948 arg_error_handling = ERRORS_SENDER;
1949 errors_sender_rc = EXIT_SUCCESS;
1951 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
1952 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
1953 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
1954 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
1959 /* -F: Set sender's full name, used instead of the gecos entry from
1960 the password file. Since users can usually alter their gecos entries,
1961 there's no security involved in using this instead. The data can follow
1962 the -F or be in the next argument. */
1967 if(++i < argc) argrest = argv[i]; else
1968 { badarg = TRUE; break; }
1970 originator_name = argrest;
1974 /* -f: Set sender's address - this value is only actually used if Exim is
1975 run by a trusted user, or if untrusted_set_sender is set and matches the
1976 address, except that the null address can always be set by any user. The
1977 test for this happens later, when the value given here is ignored when not
1978 permitted. For an untrusted user, the actual sender is still put in Sender:
1979 if it doesn't match the From: header (unless no_local_from_check is set).
1980 The data can follow the -f or be in the next argument. The -r switch is an
1981 obsolete form of -f but since there appear to be programs out there that
1982 use anything that sendmail has ever supported, better accept it - the
1983 synonymizing is done before the switch above.
1985 At this stage, we must allow domain literal addresses, because we don't
1986 know what the setting of allow_domain_literals is yet. Ditto for trailing
1987 dots and strip_trailing_dot. */
1995 if (i+1 < argc) argrest = argv[++i]; else
1996 { badarg = TRUE; break; }
2000 sender_address = string_sprintf(""); /* Ensure writeable memory */
2004 uschar *temp = argrest + Ustrlen(argrest) - 1;
2005 while (temp >= argrest && isspace(*temp)) temp--;
2006 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2007 allow_domain_literals = TRUE;
2008 strip_trailing_dot = TRUE;
2009 sender_address = parse_extract_address(argrest, &errmess, &start, &end,
2010 &sender_address_domain, TRUE);
2011 allow_domain_literals = FALSE;
2012 strip_trailing_dot = FALSE;
2013 if (sender_address == NULL)
2015 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2016 return EXIT_FAILURE;
2019 sender_address_forced = TRUE;
2023 /* This is some Sendmail thing which can be ignored */
2028 /* -h: Set the hop count for an incoming message. Exim does not currently
2029 support this; it always computes it by counting the Received: headers.
2030 To put it in will require a change to the spool header file format. */
2035 if(++i < argc) argrest = argv[i]; else
2036 { badarg = TRUE; break; }
2038 if (!isdigit(*argrest)) badarg = TRUE;
2042 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2043 not to be documented for sendmail but mailx (at least) uses it) */
2046 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2051 receiving_message = FALSE;
2053 /* -MC: continue delivery of another message via an existing open
2054 file descriptor. This option is used for an internal call by the
2055 smtp transport when there is a pending message waiting to go to an
2056 address to which it has got a connection. Five subsequent arguments are
2057 required: transport name, host name, IP address, sequence number, and
2058 message_id. Transports may decline to create new processes if the sequence
2059 number gets too big. The channel is stdin. This (-MC) must be the last
2060 argument. There's a subsequent check that the real-uid is privileged.
2062 If we are running in the test harness. delay for a bit, to let the process
2063 that set this one up complete. This makes for repeatability of the logging,
2066 if (Ustrcmp(argrest, "C") == 0)
2070 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2071 return EXIT_FAILURE;
2074 if (msg_action_arg >= 0)
2076 fprintf(stderr, "exim: incompatible arguments\n");
2077 return EXIT_FAILURE;
2080 continue_transport = argv[++i];
2081 continue_hostname = argv[++i];
2082 continue_host_address = argv[++i];
2083 continue_sequence = Uatoi(argv[++i]);
2084 msg_action = MSG_DELIVER;
2085 msg_action_arg = ++i;
2086 forced_delivery = TRUE;
2087 queue_run_pid = passed_qr_pid;
2088 queue_run_pipe = passed_qr_pipe;
2090 if (!mac_ismsgid(argv[i]))
2092 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2094 return EXIT_FAILURE;
2097 if (running_in_test_harness) millisleep(500);
2101 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2102 precedes -MC (see above). The flag indicates that the host to which
2103 Exim is connected has accepted an AUTH sequence. */
2105 else if (Ustrcmp(argrest, "CA") == 0)
2107 smtp_authenticated = TRUE;
2111 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2112 it preceded -MC (see above) */
2114 else if (Ustrcmp(argrest, "CP") == 0)
2116 smtp_use_pipelining = TRUE;
2120 /* -MCQ: pass on the pid of the queue-running process that started
2121 this chain of deliveries and the fd of its synchronizing pipe; this
2122 is useful only when it precedes -MC (see above) */
2124 else if (Ustrcmp(argrest, "CQ") == 0)
2126 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2128 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2133 /* -MCS: set the smtp_use_size flag; this is useful only when it
2134 precedes -MC (see above) */
2136 else if (Ustrcmp(argrest, "CS") == 0)
2138 smtp_use_size = TRUE;
2142 /* -MCT: set the tls_offered flag; this is useful only when it
2143 precedes -MC (see above). The flag indicates that the host to which
2144 Exim is connected has offered TLS support. */
2147 else if (Ustrcmp(argrest, "CT") == 0)
2154 /* -M[x]: various operations on the following list of message ids:
2155 -M deliver the messages, ignoring next retry times and thawing
2156 -Mc deliver the messages, checking next retry times, no thawing
2157 -Mf freeze the messages
2158 -Mg give up on the messages
2159 -Mt thaw the messages
2160 -Mrm remove the messages
2161 In the above cases, this must be the last option. There are also the
2162 following options which are followed by a single message id, and which
2163 act on that message. Some of them use the "recipient" addresses as well.
2164 -Mar add recipient(s)
2165 -Mmad mark all recipients delivered
2166 -Mmd mark recipients(s) delivered
2173 else if (*argrest == 0)
2175 msg_action = MSG_DELIVER;
2176 forced_delivery = deliver_force_thaw = TRUE;
2178 else if (Ustrcmp(argrest, "ar") == 0)
2180 msg_action = MSG_ADD_RECIPIENT;
2181 one_msg_action = TRUE;
2183 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2184 else if (Ustrcmp(argrest, "es") == 0)
2186 msg_action = MSG_EDIT_SENDER;
2187 one_msg_action = TRUE;
2189 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2190 else if (Ustrcmp(argrest, "g") == 0)
2192 msg_action = MSG_DELIVER;
2193 deliver_give_up = TRUE;
2195 else if (Ustrcmp(argrest, "mad") == 0)
2197 msg_action = MSG_MARK_ALL_DELIVERED;
2199 else if (Ustrcmp(argrest, "md") == 0)
2201 msg_action = MSG_MARK_DELIVERED;
2202 one_msg_action = TRUE;
2204 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2205 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2206 else if (Ustrcmp(argrest, "vb") == 0)
2208 msg_action = MSG_SHOW_BODY;
2209 one_msg_action = TRUE;
2211 else if (Ustrcmp(argrest, "vh") == 0)
2213 msg_action = MSG_SHOW_HEADER;
2214 one_msg_action = TRUE;
2216 else if (Ustrcmp(argrest, "vl") == 0)
2218 msg_action = MSG_SHOW_LOG;
2219 one_msg_action = TRUE;
2221 else { badarg = TRUE; break; }
2223 /* All the -Mxx options require at least one message id. */
2225 msg_action_arg = i + 1;
2226 if (msg_action_arg >= argc)
2228 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2229 return EXIT_FAILURE;
2232 /* Some require only message ids to follow */
2234 if (!one_msg_action)
2237 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2239 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2241 return EXIT_FAILURE;
2243 goto END_ARG; /* Remaining args are ids */
2246 /* Others require only one message id, possibly followed by addresses,
2247 which will be handled as normal arguments. */
2251 if (!mac_ismsgid(argv[msg_action_arg]))
2253 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2254 argv[msg_action_arg], arg);
2255 return EXIT_FAILURE;
2262 /* Some programs seem to call the -om option without the leading o;
2263 for sendmail it askes for "me too". Exim always does this. */
2266 if (*argrest != 0) badarg = TRUE;
2270 /* -N: don't do delivery - a debugging option that stops transports doing
2271 their thing. It implies debugging at the D_v level. */
2276 dont_deliver = TRUE;
2277 debug_selector |= D_v;
2278 debug_file = stderr;
2284 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2290 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2291 option to the specified value. This form uses long names. We need to handle
2292 -O option=value and -Ooption=value. */
2299 fprintf(stderr, "exim: string expected after -O\n");
2307 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2310 if (*argrest == 'A')
2312 alias_arg = argrest + 1;
2313 if (alias_arg[0] == 0)
2315 if (i+1 < argc) alias_arg = argv[++i]; else
2317 fprintf(stderr, "exim: string expected after -oA\n");
2323 /* -oB: Set a connection message max value for remote deliveries */
2325 else if (*argrest == 'B')
2327 uschar *p = argrest + 1;
2330 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2332 connection_max_messages = 1;
2341 fprintf(stderr, "exim: number expected after -oB\n");
2344 connection_max_messages = Uatoi(p);
2348 /* -odb: background delivery */
2350 else if (Ustrcmp(argrest, "db") == 0)
2352 synchronous_delivery = FALSE;
2353 arg_queue_only = FALSE;
2354 queue_only_set = TRUE;
2357 /* -odf: foreground delivery (smail-compatible option); same effect as
2358 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2361 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2363 synchronous_delivery = TRUE;
2364 arg_queue_only = FALSE;
2365 queue_only_set = TRUE;
2368 /* -odq: queue only */
2370 else if (Ustrcmp(argrest, "dq") == 0)
2372 synchronous_delivery = FALSE;
2373 arg_queue_only = TRUE;
2374 queue_only_set = TRUE;
2377 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2378 but no remote delivery */
2380 else if (Ustrcmp(argrest, "dqs") == 0)
2383 arg_queue_only = FALSE;
2384 queue_only_set = TRUE;
2387 /* -oex: Sendmail error flags. As these are also accepted without the
2388 leading -o prefix, for compatibility with vacation and other callers,
2389 they are handled with -e above. */
2391 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2392 -oitrue: Another sendmail syntax for the same */
2394 else if (Ustrcmp(argrest, "i") == 0 ||
2395 Ustrcmp(argrest, "itrue") == 0)
2398 /* -oM*: Set various characteristics for an incoming message; actually
2399 acted on for trusted callers only. */
2401 else if (*argrest == 'M')
2405 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
2409 /* -oMa: Set sender host address */
2411 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
2413 /* -oMaa: Set authenticator name */
2415 else if (Ustrcmp(argrest, "Maa") == 0)
2416 sender_host_authenticated = argv[++i];
2418 /* -oMas: setting authenticated sender */
2420 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
2422 /* -oMai: setting authenticated id */
2424 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
2426 /* -oMi: Set incoming interface address */
2428 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
2430 /* -oMr: Received protocol */
2432 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
2434 /* -oMs: Set sender host name */
2436 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
2438 /* -oMt: Set sender ident */
2440 else if (Ustrcmp(argrest, "Mt") == 0) sender_ident = argv[++i];
2442 /* Else a bad argument */
2451 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2452 seem to call this as -m (undocumented), so that is also accepted (see
2455 else if (Ustrcmp(argrest, "m") == 0) {}
2457 /* -oo: An ancient flag for old-style addresses which still seems to
2458 crop up in some calls (see in SCO). */
2460 else if (Ustrcmp(argrest, "o") == 0) {}
2462 /* -oP <name>: set pid file path for daemon */
2464 else if (Ustrcmp(argrest, "P") == 0)
2465 override_pid_file_path = argv[++i];
2467 /* -or <n>: set timeout for non-SMTP acceptance
2468 -os <n>: set timeout for SMTP acceptance */
2470 else if (*argrest == 'r' || *argrest == 's')
2472 int *tp = (*argrest == 'r')?
2473 &arg_receive_timeout : &arg_smtp_receive_timeout;
2474 if (argrest[1] == 0)
2476 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
2478 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
2481 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2486 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2488 else if (Ustrcmp(argrest, "X") == 0)
2489 override_local_interfaces = argv[++i];
2491 /* Unknown -o argument */
2497 /* -ps: force Perl startup; -pd force delayed Perl startup */
2501 if (*argrest == 's' && argrest[1] == 0)
2503 perl_start_option = 1;
2506 if (*argrest == 'd' && argrest[1] == 0)
2508 perl_start_option = -1;
2513 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2514 which sets the host protocol and host name */
2518 if (i+1 < argc) argrest = argv[++i]; else
2519 { badarg = TRUE; break; }
2524 uschar *hn = Ustrchr(argrest, ':');
2527 received_protocol = argrest;
2531 received_protocol = string_copyn(argrest, hn - argrest);
2532 sender_host_name = hn + 1;
2539 receiving_message = FALSE;
2541 /* -qq...: Do queue runs in a 2-stage manner */
2543 if (*argrest == 'q')
2545 queue_2stage = TRUE;
2549 /* -qi...: Do only first (initial) deliveries */
2551 if (*argrest == 'i')
2553 queue_run_first_delivery = TRUE;
2557 /* -qf...: Run the queue, forcing deliveries
2558 -qff..: Ditto, forcing thawing as well */
2560 if (*argrest == 'f')
2562 queue_run_force = TRUE;
2563 if (*(++argrest) == 'f')
2565 deliver_force_thaw = TRUE;
2570 /* -q[f][f]l...: Run the queue only on local deliveries */
2572 if (*argrest == 'l')
2574 queue_run_local = TRUE;
2578 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2579 optionally starting from a given message id. */
2581 if (*argrest == 0 &&
2582 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
2585 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2586 start_queue_run_id = argv[++i];
2587 if (i+1 < argc && mac_ismsgid(argv[i+1]))
2588 stop_queue_run_id = argv[++i];
2591 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2592 optionally local only. */
2597 queue_interval = readconf_readtime(argrest, 0, FALSE);
2599 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
2600 if (queue_interval <= 0)
2602 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2609 case 'R': /* Synonymous with -qR... */
2610 receiving_message = FALSE;
2612 /* -Rf: As -R (below) but force all deliveries,
2613 -Rff: Ditto, but also thaw all frozen messages,
2614 -Rr: String is regex
2615 -Rrf: Regex and force
2616 -Rrff: Regex and force and thaw
2618 in all cases provided there are no further characters in this
2624 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2626 if (Ustrcmp(argrest, rsopts[i]) == 0)
2628 if (i != 2) queue_run_force = TRUE;
2629 if (i >= 2) deliver_selectstring_regex = TRUE;
2630 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2631 argrest += Ustrlen(rsopts[i]);
2636 /* -R: Set string to match in addresses for forced queue run to
2637 pick out particular messages. */
2641 if (i+1 < argc) deliver_selectstring = argv[++i]; else
2643 fprintf(stderr, "exim: string expected after -R\n");
2647 else deliver_selectstring = argrest;
2648 if (queue_interval < 0) queue_interval = 0;
2652 /* -r: an obsolete synonym for -f (see above) */
2655 /* -S: Like -R but works on sender. */
2657 case 'S': /* Synonymous with -qS... */
2658 receiving_message = FALSE;
2660 /* -Sf: As -S (below) but force all deliveries,
2661 -Sff: Ditto, but also thaw all frozen messages,
2662 -Sr: String is regex
2663 -Srf: Regex and force
2664 -Srff: Regex and force and thaw
2666 in all cases provided there are no further characters in this
2672 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
2674 if (Ustrcmp(argrest, rsopts[i]) == 0)
2676 if (i != 2) queue_run_force = TRUE;
2677 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
2678 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
2679 argrest += Ustrlen(rsopts[i]);
2684 /* -S: Set string to match in addresses for forced queue run to
2685 pick out particular messages. */
2689 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
2691 fprintf(stderr, "exim: string expected after -S\n");
2695 else deliver_selectstring_sender = argrest;
2696 if (queue_interval < 0) queue_interval = 0;
2699 /* -Tqt is an option that is exclusively for use by the testing suite.
2700 It is not recognized in other circumstances. It allows for the setting up
2701 of explicit "queue times" so that various warning/retry things can be
2702 tested. Otherwise variability of clock ticks etc. cause problems. */
2705 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
2706 fudged_queue_times = argv[++i];
2711 /* -t: Set flag to extract recipients from body of message. */
2714 if (*argrest == 0) extract_recipients = TRUE;
2716 /* -ti: Set flag to extract recipients from body of message, and also
2717 specify that dot does not end the message. */
2719 else if (Ustrcmp(argrest, "i") == 0)
2721 extract_recipients = TRUE;
2725 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2728 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_on_connect = TRUE;
2735 /* -U: This means "initial user submission" in sendmail, apparently. The
2736 doc claims that in future sendmail may refuse syntactically invalid
2737 messages instead of fixing them. For the moment, we just ignore it. */
2743 /* -v: verify things - this is a very low-level debugging */
2748 debug_selector |= D_v;
2749 debug_file = stderr;
2755 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2757 The -x flag tells the sendmail command that mail from a local
2758 mail program has National Language Support (NLS) extended characters
2759 in the body of the mail item. The sendmail command can send mail with
2760 extended NLS characters across networks that normally corrupts these
2763 As Exim is 8-bit clean, it just ignores this flag. */
2766 if (*argrest != 0) badarg = TRUE;
2769 /* All other initial characters are errors */
2774 } /* End of high-level switch statement */
2776 /* Failed to recognize the option, or syntax error */
2780 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
2781 "option %s\n", arg);
2787 /* Arguments have been processed. Check for incompatibilities. */
2791 (smtp_input || extract_recipients || recipients_arg < argc) &&
2792 (daemon_listen || queue_interval >= 0 || bi_option ||
2793 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
2794 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
2797 msg_action_arg > 0 &&
2798 (daemon_listen || queue_interval >= 0 || list_options || checking ||
2799 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
2802 (daemon_listen || queue_interval >= 0) &&
2803 (sender_address != NULL || list_options || list_queue || checking ||
2807 daemon_listen && queue_interval == 0
2811 (checking || smtp_input || extract_recipients ||
2812 filter_test != FTEST_NONE || bi_option)
2815 verify_address_mode &&
2816 (address_test_mode || smtp_input || extract_recipients ||
2817 filter_test != FTEST_NONE || bi_option)
2820 address_test_mode && (smtp_input || extract_recipients ||
2821 filter_test != FTEST_NONE || bi_option)
2824 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
2828 deliver_selectstring != NULL && queue_interval < 0
2832 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
2836 /* If debugging is set up, set the file and the file descriptor to pass on to
2837 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2838 to run in the foreground. */
2840 if (debug_selector != 0)
2842 debug_file = stderr;
2843 debug_fd = fileno(debug_file);
2844 background_daemon = FALSE;
2845 if (running_in_test_harness) millisleep(100); /* lets caller finish */
2846 if (debug_selector != D_v) /* -v only doesn't show this */
2848 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2849 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
2851 show_whats_supported(stderr);
2855 /* When started with root privilege, ensure that the limits on the number of
2856 open files and the number of processes (where that is accessible) are
2857 sufficiently large, or are unset, in case Exim has been called from an
2858 environment where the limits are screwed down. Not all OS have the ability to
2859 change some of these limits. */
2863 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
2869 #ifdef RLIMIT_NOFILE
2870 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
2872 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
2874 rlp.rlim_cur = rlp.rlim_max = 0;
2877 /* I originally chose 1000 as a nice big number that was unlikely to
2878 be exceeded. It turns out that some older OS have a fixed upper limit of
2881 if (rlp.rlim_cur < 1000)
2883 rlp.rlim_cur = rlp.rlim_max = 1000;
2884 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2886 rlp.rlim_cur = rlp.rlim_max = 256;
2887 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
2888 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
2895 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
2897 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
2899 rlp.rlim_cur = rlp.rlim_max = 0;
2902 #ifdef RLIM_INFINITY
2903 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
2905 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
2907 if (rlp.rlim_cur < 1000)
2909 rlp.rlim_cur = rlp.rlim_max = 1000;
2911 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
2912 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
2918 /* Exim is normally entered as root (but some special configurations are
2919 possible that don't do this). However, it always spins off sub-processes that
2920 set their uid and gid as required for local delivery. We don't want to pass on
2921 any extra groups that root may belong to, so we want to get rid of them all at
2924 We need to obey setgroups() at this stage, before possibly giving up root
2925 privilege for a changed configuration file, but later on we might need to
2926 check on the additional groups for the admin user privilege - can't do that
2927 till after reading the config, which might specify the exim gid. Therefore,
2928 save the group list here first. */
2930 group_count = getgroups(NGROUPS_MAX, group_list);
2932 /* There is a fundamental difference in some BSD systems in the matter of
2933 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2934 known not to be different. On the "different" systems there is a single group
2935 list, and the first entry in it is the current group. On all other versions of
2936 Unix there is a supplementary group list, which is in *addition* to the current
2937 group. Consequently, to get rid of all extraneous groups on a "standard" system
2938 you pass over 0 groups to setgroups(), while on a "different" system you pass
2939 over a single group - the current group, which is always the first group in the
2940 list. Calling setgroups() with zero groups on a "different" system results in
2941 an error return. The following code should cope with both types of system.
2943 However, if this process isn't running as root, setgroups() can't be used
2944 since you have to be root to run it, even if throwing away groups. Not being
2945 root here happens only in some unusual configurations. We just ignore the
2948 if (setgroups(0, NULL) != 0)
2950 if (setgroups(1, group_list) != 0 && !unprivileged)
2952 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
2957 /* If the configuration file name has been altered by an argument on the
2958 command line (either a new file name or a macro definition) and the caller is
2959 not root or the exim user, or if this is a filter testing run, remove any
2960 setuid privilege the program has, and run as the underlying user.
2962 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
2963 severely restricts the use of -C for some purposes.
2965 Otherwise, set the real ids to the effective values (should be root unless run
2966 from inetd, which it can either be root or the exim uid, if one is configured).
2968 There is a private mechanism for bypassing some of this, in order to make it
2969 possible to test lots of configurations automatically, without having either to
2970 recompile each time, or to patch in an actual configuration file name and other
2971 values (such as the path name). If running in the test harness, pretend that
2972 configuration file changes and macro definitions haven't happened. */
2975 (config_changed || macros != NULL) && /* Config changed, and */
2976 real_uid != root_uid && /* Not root, and */
2977 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
2978 real_uid != exim_uid && /* Not exim, and */
2980 !running_in_test_harness /* Not fudged */
2982 expansion_test /* expansion testing */
2984 filter_test != FTEST_NONE) /* Filter testing */
2986 setgroups(group_count, group_list);
2987 exim_setugid(real_uid, real_gid, FALSE,
2988 US"-C, -D, -be or -bf forces real uid");
2989 removed_privilege = TRUE;
2991 /* In the normal case when Exim is called like this, stderr is available
2992 and should be used for any logging information because attempts to write
2993 to the log will usually fail. To arrange this, we unset really_exim. However,
2994 if no stderr is available there is no point - we might as well have a go
2995 at the log (if it fails, syslog will be written). */
2997 if (log_stderr != NULL) really_exim = FALSE;
3000 /* Privilege is to be retained for the moment. It may be dropped later,
3001 depending on the job that this Exim process has been asked to do. For now, set
3002 the real uid to the effective so that subsequent re-execs of Exim are done by a
3005 else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3007 /* If testing a filter, open the file(s) now, before wasting time doing other
3008 setups and reading the message. */
3010 if ((filter_test & FTEST_SYSTEM) != 0)
3012 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3015 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3017 return EXIT_FAILURE;
3021 if ((filter_test & FTEST_USER) != 0)
3023 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3026 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
3028 return EXIT_FAILURE;
3032 /* Read the main runtime configuration data; this gives up if there
3033 is a failure. It leaves the configuration file open so that the subsequent
3034 configuration data for delivery can be read if needed. */
3038 /* Handle the decoding of logging options. */
3040 decode_bits(&log_write_selector, &log_extra_selector, log_selector_string,
3041 log_options, log_options_count, US"log");
3045 debug_printf("configuration file is %s\n", config_main_filename);
3046 debug_printf("log selectors = %08x %08x\n", log_write_selector,
3047 log_extra_selector);
3050 /* If domain literals are not allowed, check the sender address that was
3051 supplied with -f. Ditto for a stripped trailing dot. */
3053 if (sender_address != NULL)
3055 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3057 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3058 "allowed\n", sender_address);
3059 return EXIT_FAILURE;
3061 if (f_end_dot && !strip_trailing_dot)
3063 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3064 "(trailing dot not allowed)\n", sender_address);
3065 return EXIT_FAILURE;
3069 /* Paranoia check of maximum lengths of certain strings. There is a check
3070 on the length of the log file path in log.c, which will come into effect
3071 if there are any calls to write the log earlier than this. However, if we
3072 get this far but the string is very long, it is better to stop now than to
3073 carry on and (e.g.) receive a message and then have to collapse. The call to
3074 log_write() from here will cause the ultimate panic collapse if the complete
3075 file name exceeds the buffer length. */
3077 if (Ustrlen(log_file_path) > 200)
3078 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3079 "log_file_path is longer than 200 chars: aborting");
3081 if (Ustrlen(pid_file_path) > 200)
3082 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3083 "pid_file_path is longer than 200 chars: aborting");
3085 if (Ustrlen(spool_directory) > 200)
3086 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3087 "spool_directory is longer than 200 chars: aborting");
3089 /* Length check on the process name given to syslog for its TAG field,
3090 which is only permitted to be 32 characters or less. See RFC 3164. */
3092 if (Ustrlen(syslog_processname) > 32)
3093 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3094 "syslog_processname is longer than 32 chars: aborting");
3096 /* In some operating systems, the environment variable TMPDIR controls where
3097 temporary files are created; Exim doesn't use these (apart from when delivering
3098 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3099 If TMPDIR is found in the environment, reset it to the value defined in the
3100 TMPDIR macro, if this macro is defined. */
3105 for (p = USS environ; *p != NULL; p++)
3107 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3108 Ustrcmp(*p+7, TMPDIR) != 0)
3110 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3111 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3113 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3119 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3120 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3121 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3122 called by a user who has set the TZ variable. This then affects the timestamps
3123 in log files and in Received: headers, and any created Date: header lines. The
3124 required timezone is settable in the configuration file, so nothing can be done
3125 about this earlier - but hopefully nothing will normally be logged earlier than
3126 this. We have to make a new environment if TZ is wrong, but don't bother if
3127 timestamps_utc is set, because then all times are in UTC anyway. */
3129 if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3131 timestamps_utc = TRUE;
3135 uschar *envtz = US getenv("TZ");
3136 if ((envtz == NULL && timezone_string != NULL) ||
3138 (timezone_string == NULL ||
3139 Ustrcmp(timezone_string, envtz) != 0)))
3141 uschar **p = USS environ;
3145 while (*p++ != NULL) count++;
3146 if (envtz == NULL) count++;
3147 newp = new = malloc(sizeof(uschar *) * (count + 1));
3148 for (p = USS environ; *p != NULL; p++)
3150 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3153 if (timezone_string != NULL)
3155 *newp = malloc(Ustrlen(timezone_string) + 4);
3156 sprintf(CS *newp++, "TZ=%s", timezone_string);
3161 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3162 tod_stamp(tod_log));
3166 /* Handle the case when we have removed the setuid privilege because of -C or
3167 -D. This means that the caller of Exim was not root, and, provided that
3168 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3171 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3172 were running as the exim user defined in the configuration file (different to
3173 the one in the binary). The sysadmin may expect this case to retain privilege
3174 because "the binary was called by the Exim user", but it hasn't, because of the
3175 order in which it handles this stuff. There are two possibilities:
3177 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3178 to do message deliveries. Thus, the fact that it is running as a
3179 non-privileged user is plausible, and might be wanted in some special
3180 configurations. However, really_exim will have been set false when
3181 privilege was dropped, to stop Exim trying to write to its normal log
3182 files. Therefore, re-enable normal log processing, assuming the sysadmin
3183 has set up the log directory correctly.
3185 (2) If deliver_drop_privilege is not set, the configuration won't work as
3186 apparently intended, and so we log a panic message. In order to retain
3187 root for -C or -D, the caller must either be root or the Exim user
3188 defined in the binary (when deliver_drop_ privilege is false).
3190 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3191 built-in exim user or one defined in the configuration. In either event,
3192 re-enable log processing, assuming the sysadmin knows what they are doing. */
3194 if (removed_privilege && (config_changed || macros != NULL) &&
3195 real_uid == exim_uid)
3197 #ifdef ALT_CONFIG_ROOT_ONLY
3198 really_exim = TRUE; /* let logging work normally */
3201 if (deliver_drop_privilege)
3202 really_exim = TRUE; /* let logging work normally */
3204 log_write(0, LOG_MAIN|LOG_PANIC,
3205 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3206 (int)exim_uid, config_changed? "-C" : "-D");
3210 /* Start up Perl interpreter if Perl support is configured and there is a
3211 perl_startup option, and the configuration or the command line specifies
3212 initializing starting. Note that the global variables are actually called
3213 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3216 if (perl_start_option != 0)
3217 opt_perl_at_start = (perl_start_option > 0);
3218 if (opt_perl_at_start && opt_perl_startup != NULL)
3221 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
3222 errstr = init_perl(opt_perl_startup);
3225 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
3226 return EXIT_FAILURE;
3228 opt_perl_started = TRUE;
3230 #endif /* EXIM_PERL */
3232 /* Log the arguments of the call if the configuration file said so. This is
3233 a debugging feature for finding out what arguments certain MUAs actually use.
3234 Don't attempt it if logging is disabled, or if listing variables or if
3235 verifying/testing addresses or expansions. */
3237 if ((log_extra_selector & LX_arguments) != 0 && really_exim
3238 && !list_options && !checking)
3241 uschar *p = big_buffer;
3243 (void)getcwd(CS p+4, big_buffer_size - 4);
3245 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
3247 for (i = 0; i < argc; i++)
3249 int len = Ustrlen(argv[i]);
3252 if (p + len + 8 >= big_buffer + big_buffer_size)
3255 log_write(0, LOG_MAIN, "%s", big_buffer);
3256 Ustrcpy(big_buffer, "...");
3259 printing = string_printing(argv[i]);
3260 if (printing[0] == 0) quote = US"\""; else
3262 uschar *pp = printing;
3264 while (*pp != 0) if (isspace(*pp++)) { quote = US"\""; break; }
3266 sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
3267 (p - big_buffer) - 4), printing, quote);
3270 log_write(0, LOG_MAIN, "%s", big_buffer);
3273 /* Set the working directory to be the top-level spool directory. We don't rely
3274 on this in the code, which always uses fully qualified names, but it's useful
3275 for core dumps etc. Don't complain if it fails - the spool directory might not
3276 be generally accessible and calls with the -C option (and others) have lost
3277 privilege by now. */
3279 if (Uchdir(spool_directory) != 0)
3281 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, TRUE);
3282 (void)Uchdir(spool_directory);
3285 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3286 alias file. Exim doesn't have such a concept, but this call is screwed into
3287 Sun's YP makefiles. Handle this by calling a configured script, as the real
3288 user who called Exim. The -oA option can be used to pass an argument to the
3293 fclose(config_file);
3294 if (bi_command != NULL)
3298 argv[i++] = bi_command;
3299 if (alias_arg != NULL) argv[i++] = alias_arg;
3302 setgroups(group_count, group_list);
3303 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
3305 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
3306 (argv[1] == NULL)? US"" : argv[1]);
3308 execv(CS argv[0], (char *const *)argv);
3309 fprintf(stderr, "exim: exec failed: %s\n", strerror(errno));
3314 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
3319 /* If an action on specific messages is requested, or if a daemon or queue
3320 runner is being started, we need to know if Exim was called by an admin user.
3321 This is the case if the real user is root or exim, or if the real group is
3322 exim, or if one of the supplementary groups is exim or a group listed in
3323 admin_groups. We don't fail all message actions immediately if not admin_user,
3324 since some actions can be performed by non-admin users. Instead, set admin_user
3325 for later interrogation. */
3327 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3333 for (i = 0; i < group_count; i++)
3335 if (group_list[i] == exim_gid) admin_user = TRUE;
3336 else if (admin_groups != NULL)
3338 for (j = 1; j <= (int)(admin_groups[0]); j++)
3339 if (admin_groups[j] == group_list[i])
3340 { admin_user = TRUE; break; }
3342 if (admin_user) break;
3346 /* Another group of privileged users are the trusted users. These are root,
3347 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3348 are permitted to specify sender_addresses with -f on the command line, and
3349 other message parameters as well. */
3351 if (real_uid == root_uid || real_uid == exim_uid)
3352 trusted_caller = TRUE;
3357 if (trusted_users != NULL)
3359 for (i = 1; i <= (int)(trusted_users[0]); i++)
3360 if (trusted_users[i] == real_uid)
3361 { trusted_caller = TRUE; break; }
3364 if (!trusted_caller && trusted_groups != NULL)
3366 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3368 if (trusted_groups[i] == real_gid)
3369 trusted_caller = TRUE;
3370 else for (j = 0; j < group_count; j++)
3372 if (trusted_groups[i] == group_list[j])
3373 { trusted_caller = TRUE; break; }
3375 if (trusted_caller) break;
3380 if (trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
3381 if (admin_user) DEBUG(D_any) debug_printf("admin user\n");
3383 /* Only an admin user may start the daemon or force a queue run in the default
3384 configuration, but the queue run restriction can be relaxed. Only an admin
3385 user may request that a message be returned to its sender forthwith. Only an
3386 admin user may specify a debug level greater than D_v (because it might show
3387 passwords, etc. in lookup queries). Only an admin user may request a queue
3392 BOOL debugset = (debug_selector & ~D_v) != 0;
3393 if (deliver_give_up || daemon_listen ||
3394 (count_queue && queue_list_requires_admin) ||
3395 (list_queue && queue_list_requires_admin) ||
3396 (queue_interval >= 0 && prod_requires_admin) ||
3397 (debugset && !running_in_test_harness))
3399 fprintf(stderr, "exim:%s permission denied\n", debugset? " debugging" : "");
3404 /* If the real user is not root or the exim uid, the argument for passing
3405 in an open TCP/IP connection for another message is not permitted, nor is
3406 running with the -N option for any delivery action, unless this call to exim is
3407 one that supplied an input message, or we are using a patched exim for
3408 regression testing. */
3410 if (real_uid != root_uid && real_uid != exim_uid &&
3411 (continue_hostname != NULL ||
3413 (queue_interval >= 0 || daemon_listen || msg_action_arg > 0)
3414 )) && !running_in_test_harness)
3416 fprintf(stderr, "exim: Permission denied\n");
3417 return EXIT_FAILURE;
3420 /* If the caller is not trusted, certain arguments are ignored when running for
3421 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3422 Note that authority for performing certain actions on messages is tested in the
3423 queue_action() function. */
3425 if (!trusted_caller && !checking && filter_test == FTEST_NONE)
3427 sender_host_name = sender_host_address = interface_address =
3428 sender_ident = received_protocol = NULL;
3429 sender_host_port = interface_port = 0;
3430 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
3433 /* If a sender host address is set, extract the optional port number off the
3434 end of it and check its syntax. Do the same thing for the interface address.
3435 Exim exits if the syntax is bad. */
3439 if (sender_host_address != NULL)
3440 sender_host_port = check_port(sender_host_address);
3441 if (interface_address != NULL)
3442 interface_port = check_port(interface_address);
3445 /* If an SMTP message is being received check to see if the standard input is a
3446 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3447 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3452 union sockaddr_46 inetd_sock;
3453 SOCKLEN_T size = sizeof(inetd_sock);
3454 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
3456 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
3457 if (family == AF_INET || family == AF_INET6)
3459 union sockaddr_46 interface_sock;
3460 size = sizeof(interface_sock);
3462 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
3463 interface_address = host_ntoa(-1, &interface_sock, NULL,
3466 if (host_is_tls_on_connect_port(interface_port)) tls_on_connect = TRUE;
3468 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
3471 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
3472 NULL, &sender_host_port);
3473 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
3474 "inetd is not supported when mua_wrapper is set");
3479 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3480 return EXIT_FAILURE;
3486 /* If the load average is going to be needed while receiving a message, get it
3487 now for those OS that require the first call to os_getloadavg() to be done as
3488 root. There will be further calls later for each message received. */
3490 #ifdef LOAD_AVG_NEEDS_ROOT
3491 if (receiving_message &&
3492 (queue_only_load >= 0 ||
3493 (is_inetd && smtp_load_reserve >= 0)
3496 load_average = os_getloadavg();
3500 /* The queue_only configuration option can be overridden by -odx on the command
3501 line, except that if queue_only_override is false, queue_only cannot be unset
3502 from the command line. */
3504 if (queue_only_set && (queue_only_override || arg_queue_only))
3505 queue_only = arg_queue_only;
3507 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3510 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
3511 if (arg_smtp_receive_timeout >= 0)
3512 smtp_receive_timeout = arg_smtp_receive_timeout;
3514 /* If Exim was started with root privilege, unless we have already removed the
3515 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3516 except when starting the daemon or doing some kind of delivery or address
3517 testing (-bt). These are the only cases when root need to be retained. We run
3518 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3519 retained only for starting the daemon. */
3521 if (!unprivileged && /* originally had root AND */
3522 !removed_privilege && /* still got root AND */
3523 !daemon_listen && /* not starting the daemon */
3524 queue_interval <= 0 && /* (either kind of daemon) */
3526 deliver_drop_privilege || /* requested unprivileged */
3528 queue_interval < 0 && /* not running the queue */
3529 (msg_action_arg < 0 || /* and */
3530 msg_action != MSG_DELIVER) && /* not delivering and */
3531 (!checking || !address_test_mode) /* not address checking */
3535 exim_setugid(exim_uid, exim_gid, FALSE, US"privilege not needed");
3538 /* When we are retaining a privileged uid, we still change to the exim gid. */
3540 else setgid(exim_gid);
3542 /* Handle a request to list the delivery queue */
3546 set_process_info("listing the queue");
3547 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
3551 /* Handle a request to count the delivery queue */
3555 set_process_info("counting the queue");
3560 /* Handle actions on specific messages, except for the force delivery action,
3561 which is done below. Some actions take a whole list of message ids, which
3562 are known to continue up to the end of the arguments. Others take a single
3563 message id and then operate on the recipients list. */
3565 if (msg_action_arg > 0 && msg_action != MSG_DELIVER)
3567 int yield = EXIT_SUCCESS;
3568 set_process_info("acting on specified messages");
3570 if (!one_msg_action)
3572 for (i = msg_action_arg; i < argc; i++)
3573 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
3574 yield = EXIT_FAILURE;
3577 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
3578 recipients_arg)) yield = EXIT_FAILURE;
3582 /* All the modes below here require the remaining configuration sections
3583 to be read, except that we can skip over the ACL setting when delivering
3584 specific messages, or doing a queue run. (For various testing cases we could
3585 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3588 readconf_rest(msg_action_arg > 0 || (queue_interval == 0 && !daemon_listen));
3590 /* The configuration data will have been read into POOL_PERM because we won't
3591 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3592 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3593 configuration were read into POOL_MAIN, because we don't do any resets till
3594 later on. However, it seems right, and it does ensure that both pools get used.
3597 store_pool = POOL_MAIN;
3599 /* Handle the -brt option. This is for checking out retry configurations.
3600 The next three arguments are a domain name or a complete address, and
3601 optionally two error numbers. All it does is to call the function that
3602 scans the retry configuration data. */
3604 if (test_retry_arg >= 0)
3606 retry_config *yield;
3607 int basic_errno = 0;
3611 if (test_retry_arg >= argc)
3613 printf("-brt needs a domain or address argument\n");
3614 exim_exit(EXIT_FAILURE);
3616 s1 = argv[test_retry_arg++];
3619 /* If the first argument contains no @ and no . it might be a local user
3620 or it might be a single-component name. Treat as a domain. */
3622 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
3624 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3625 "being \ntreated as a one-component domain, not as a local part.\n\n",
3629 /* There may be an optional second domain arg. */
3631 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
3632 s2 = argv[test_retry_arg++];
3634 /* The final arg is an error name */
3636 if (test_retry_arg < argc)
3638 uschar *ss = argv[test_retry_arg];
3640 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
3643 printf("%s\n", CS error);
3644 return EXIT_FAILURE;
3647 /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as
3648 an error is for matching codes to the decade. Turn them into a real error
3649 code, off the decade. */
3651 if (basic_errno == ERRNO_RCPT4XX)
3653 int code = (more_errno >> 8) & 255;
3655 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
3656 else if (code > 100)
3657 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
3661 yield = retry_find_config(s1, s2, basic_errno, more_errno);
3662 if (yield == NULL) printf("No retry information found\n"); else
3665 more_errno = yield->more_errno;
3666 printf("Retry rule: %s ", yield->pattern);
3668 if (yield->basic_errno == ERRNO_EXIMQUOTA)
3670 printf("quota%s%s ",
3671 (more_errno > 0)? "_" : "",
3672 (more_errno > 0)? readconf_printtime(more_errno) : US"");
3674 else if (yield->basic_errno == ECONNREFUSED)
3676 printf("refused%s%s ",
3677 (more_errno > 0)? "_" : "",
3678 (more_errno == 'M')? "MX" :
3679 (more_errno == 'A')? "A" : "");
3681 else if (yield->basic_errno == ETIMEDOUT)
3684 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
3686 if (more_errno != 0) printf("_%s",
3687 (more_errno == 'M')? "MX" : "A");
3690 else if (yield->basic_errno == ERRNO_AUTHFAIL)
3691 printf("auth_failed ");
3694 for (r = yield->rules; r != NULL; r = r->next)
3696 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
3697 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
3703 printf(",%d.", x/1000);
3717 exim_exit(EXIT_SUCCESS);
3720 /* Handle a request to list one or more configuration options */
3724 set_process_info("listing variables");
3725 if (recipients_arg >= argc) readconf_print(US"all", NULL);
3726 else for (i = recipients_arg; i < argc; i++)
3729 (Ustrcmp(argv[i], "router") == 0 ||
3730 Ustrcmp(argv[i], "transport") == 0 ||
3731 Ustrcmp(argv[i], "authenticator") == 0))
3733 readconf_print(argv[i+1], argv[i]);
3736 else readconf_print(argv[i], NULL);
3738 exim_exit(EXIT_SUCCESS);
3742 /* Handle a request to deliver one or more messages that are already on the
3743 queue. Values of msg_action other than MSG_DELIVER are dealt with above. This
3744 is typically used for a small number when prodding by hand (when the option
3745 forced_delivery will be set) or when re-execing to regain root privilege.
3746 Each message delivery must happen in a separate process, so we fork a process
3747 for each one, and run them sequentially so that debugging output doesn't get
3748 intertwined, and to avoid spawning too many processes if a long list is given.
3749 However, don't fork for the last one; this saves a process in the common case
3750 when Exim is called to deliver just one message. */
3752 if (msg_action_arg > 0)
3754 if (prod_requires_admin && !admin_user)
3756 fprintf(stderr, "exim: Permission denied\n");
3757 exim_exit(EXIT_FAILURE);
3759 set_process_info("delivering specified messages");
3760 if (deliver_give_up) forced_delivery = deliver_force_thaw = TRUE;
3761 for (i = msg_action_arg; i < argc; i++)
3766 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3767 else if ((pid = fork()) == 0)
3769 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
3770 _exit(EXIT_SUCCESS);
3774 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
3776 exim_exit(EXIT_FAILURE);
3780 exim_exit(EXIT_SUCCESS);
3784 /* If only a single queue run is requested, without SMTP listening, we can just
3785 turn into a queue runner, with an optional starting message id. */
3787 if (queue_interval == 0 && !daemon_listen)
3789 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
3790 (start_queue_run_id == NULL)? US"" : US" starting at ",
3791 (start_queue_run_id == NULL)? US"" : start_queue_run_id,
3792 (stop_queue_run_id == NULL)? US"" : US" stopping at ",
3793 (stop_queue_run_id == NULL)? US"" : stop_queue_run_id);
3794 set_process_info("running the queue (single queue run)");
3795 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
3796 exim_exit(EXIT_SUCCESS);
3800 /* Find the login name of the real user running this process. This is always
3801 needed when receiving a message, because it is written into the spool file. It
3802 may also be used to construct a from: or a sender: header, and in this case we
3803 need the user's full name as well, so save a copy of it, checked for RFC822
3804 syntax and munged if necessary, if it hasn't previously been set by the -F
3805 argument. We may try to get the passwd entry more than once, in case NIS or
3806 other delays are in evidence. Save the home directory for use in filter testing
3811 if ((pw = getpwuid(real_uid)) != NULL)
3813 originator_login = string_copy(US pw->pw_name);
3814 originator_home = string_copy(US pw->pw_dir);
3816 /* If user name has not been set by -F, set it from the passwd entry
3817 unless -f has been used to set the sender address by a trusted user. */
3819 if (originator_name == NULL)
3821 if (sender_address == NULL ||
3822 (!trusted_caller && filter_test == FTEST_NONE))
3824 uschar *name = US pw->pw_gecos;
3825 uschar *amp = Ustrchr(name, '&');
3828 /* Most Unix specify that a '&' character in the gecos field is
3829 replaced by a copy of the login name, and some even specify that
3830 the first character should be upper cased, so that's what we do. */
3835 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
3836 amp - name, name, &loffset, originator_login, amp + 1);
3837 buffer[loffset] = toupper(buffer[loffset]);
3841 /* If a pattern for matching the gecos field was supplied, apply
3842 it and then expand the name string. */
3844 if (gecos_pattern != NULL && gecos_name != NULL)
3847 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
3849 if (regex_match_and_setup(re, name, 0, -1))
3851 uschar *new_name = expand_string(gecos_name);
3853 if (new_name != NULL)
3855 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
3856 "gecos field \"%s\"\n", new_name, name);
3859 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
3860 "\"%s\": %s\n", gecos_name, expand_string_message);
3862 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
3863 "gecos field \"%s\"\n", gecos_pattern, name);
3864 store_free((void *)re);
3866 originator_name = string_copy(name);
3869 /* A trusted caller has used -f but not -F */
3871 else originator_name = US"";
3874 /* Break the retry loop */
3879 if (++i > finduser_retries) break;
3883 /* If we cannot get a user login, log the incident and give up, unless the
3884 configuration specifies something to use. When running in the test harness,
3885 any setting of unknown_login overrides the actual login name. */
3887 if (originator_login == NULL || running_in_test_harness)
3889 if (unknown_login != NULL)
3891 originator_login = expand_string(unknown_login);
3892 if (originator_name == NULL && unknown_username != NULL)
3893 originator_name = expand_string(unknown_username);
3894 if (originator_name == NULL) originator_name = US"";
3896 if (originator_login == NULL)
3897 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
3901 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
3904 originator_name = string_copy(parse_fix_phrase(originator_name,
3905 Ustrlen(originator_name), big_buffer, big_buffer_size));
3907 /* If a message is created by this call of Exim, the uid/gid of its originator
3908 are those of the caller. These values are overridden if an existing message is
3909 read in from the spool. */
3911 originator_uid = real_uid;
3912 originator_gid = real_gid;
3914 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
3915 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
3917 /* Run in daemon and/or queue-running mode. The function daemon_go() never
3918 returns. We leave this till here so that the originator_ fields are available
3919 for incoming messages via the daemon. */
3921 if (daemon_listen || queue_interval > 0)
3923 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be "
3924 "run when mua_wrapper is set");
3928 /* If the sender ident has not been set (by a trusted caller) set it to
3929 the caller. This will get overwritten below for an inetd call. If a trusted
3930 caller has set it empty, unset it. */
3932 if (sender_ident == NULL) sender_ident = originator_login;
3933 else if (sender_ident[0] == 0) sender_ident = NULL;
3935 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
3936 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
3937 originator_* variables set. */
3939 if (test_rewrite_arg >= 0)
3941 really_exim = FALSE;
3942 if (test_rewrite_arg >= argc)
3944 printf("-brw needs an address argument\n");
3945 exim_exit(EXIT_FAILURE);
3947 rewrite_test(argv[test_rewrite_arg]);
3948 exim_exit(EXIT_SUCCESS);
3951 /* A locally-supplied message is considered to be coming from a local user
3952 unless a trusted caller supplies a sender address with -f, or is passing in the
3953 message via SMTP (inetd invocation or otherwise). */
3955 if ((sender_address == NULL && !smtp_input) ||
3956 (!trusted_caller && filter_test == FTEST_NONE))
3958 sender_local = TRUE;
3960 /* A trusted caller can supply authenticated_sender and authenticated_id
3961 via -oMas and -oMai and if so, they will already be set. */
3963 if (authenticated_sender == NULL)
3964 authenticated_sender = string_sprintf("%s@%s", originator_login,
3965 qualify_domain_sender);
3966 if (authenticated_id == NULL) authenticated_id = originator_login;
3969 /* Trusted callers are always permitted to specify the sender address.
3970 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
3971 is specified is the empty address. However, if a trusted caller does not
3972 specify a sender address for SMTP input, we leave sender_address unset. This
3973 causes the MAIL commands to be honoured. */
3975 if ((!smtp_input && sender_address == NULL) ||
3976 !receive_check_set_sender(sender_address))
3978 /* Either the caller is not permitted to set a general sender, or this is
3979 non-SMTP input and the trusted caller has not set a sender. If there is no
3980 sender, or if a sender other than <> is set, override with the originator's
3981 login (which will get qualified below), except when checking things. */
3983 if (sender_address == NULL /* No sender_address set */
3985 (sender_address[0] != 0 && /* Non-empty sender address, AND */
3986 !checking && /* Not running tests, AND */
3987 filter_test == FTEST_NONE)) /* Not testing a filter */
3989 sender_address = originator_login;
3990 sender_address_forced = FALSE;
3991 sender_address_domain = 0;
3995 /* Remember whether an untrusted caller set the sender address */
3997 sender_set_untrusted = sender_address != originator_login && !trusted_caller;
3999 /* Ensure that the sender address is fully qualified unless it is the empty
4000 address, which indicates an error message, or doesn't exist (root caller, smtp
4001 interface, no -f argument). */
4003 if (sender_address != NULL && sender_address[0] != 0 &&
4004 sender_address_domain == 0)
4005 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4006 qualify_domain_sender);
4008 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4010 /* Handle a request to verify a list of addresses, or test them for delivery.
4011 This must follow the setting of the sender address, since routers can be
4012 predicated upon the sender. If no arguments are given, read addresses from
4013 stdin. Set debug_level to at least D_v to get full output for address testing.
4016 if (verify_address_mode || address_test_mode)
4019 int flags = vopt_qualify;
4021 if (verify_address_mode)
4023 if (!verify_as_sender) flags |= vopt_is_recipient;
4024 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4029 flags |= vopt_is_recipient;
4030 debug_selector |= D_v;
4031 debug_file = stderr;
4032 debug_fd = fileno(debug_file);
4033 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4036 if (recipients_arg < argc)
4038 while (recipients_arg < argc)
4040 uschar *s = argv[recipients_arg++];
4043 BOOL finished = FALSE;
4044 uschar *ss = parse_find_address_end(s, FALSE);
4045 if (*ss == ',') *ss = 0; else finished = TRUE;
4046 test_address(s, flags, &exit_value);
4049 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4056 uschar *s = get_stdinput(NULL, NULL);
4057 if (s == NULL) break;
4058 test_address(s, flags, &exit_value);
4062 exim_exit(exit_value);
4065 /* Handle expansion checking */
4069 if (recipients_arg < argc)
4071 while (recipients_arg < argc)
4073 uschar *s = argv[recipients_arg++];
4074 uschar *ss = expand_string(s);
4076 printf ("Failed: %s\n", expand_string_message);
4077 else printf("%s\n", CS ss);
4085 char *(*fn_readline)(char *) = NULL;
4086 char *(*fn_addhist)(char *) = NULL;
4089 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4095 uschar *source = get_stdinput(fn_readline, fn_addhist);
4096 if (source == NULL) break;
4097 ss = expand_string(source);
4099 printf ("Failed: %s\n", expand_string_message);
4100 else printf("%s\n", CS ss);
4104 if (dlhandle != NULL) dlclose(dlhandle);
4108 exim_exit(EXIT_SUCCESS);
4112 /* The active host name is normally the primary host name, but it can be varied
4113 for hosts that want to play several parts at once. We need to ensure that it is
4114 set for host checking, and for receiving messages. */
4116 smtp_active_hostname = primary_hostname;
4117 if (raw_active_hostname != NULL)
4119 uschar *nah = expand_string(raw_active_hostname);
4122 if (!expand_string_forcedfail)
4123 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
4124 "(smtp_active_hostname): %s", raw_active_hostname,
4125 expand_string_message);
4127 else if (nah[0] != 0) smtp_active_hostname = nah;
4130 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4131 given IP address so that the blocking and relay configuration can be tested. An
4132 RFC 1413 call is made only if we are running in the test harness and an
4133 incoming interface and both ports are specified, because there is no TCP/IP
4134 call to find the ident for. */
4141 sender_ident = NULL;
4142 if (running_in_test_harness && sender_host_port != 0 &&
4143 interface_address != NULL && interface_port != 0)
4144 verify_get_ident(1413);
4146 /* In case the given address is a non-canonical IPv6 address, canonicize
4147 it. The code works for both IPv4 and IPv6, as it happens. */
4149 size = host_aton(sender_host_address, x);
4150 sender_host_address = store_get(48); /* large enough for full IPv6 */
4151 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
4153 /* Now set up for testing */
4155 host_build_sender_fullhost();
4159 sender_local = FALSE;
4160 sender_host_notsocket = TRUE;
4161 debug_file = stderr;
4162 debug_fd = fileno(debug_file);
4163 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
4164 "**** but without any ident (RFC 1413) callback.\n"
4165 "**** This is not for real!\n\n",
4166 sender_host_address);
4168 if (verify_check_host(&hosts_connection_nolog) == OK)
4169 log_write_selector &= ~L_smtp_connection;
4170 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4172 if (smtp_start_session())
4174 reset_point = store_get(0);
4177 store_reset(reset_point);
4178 if (smtp_setup_msg() <= 0) break;
4179 if (!receive_msg(FALSE)) break;
4182 exim_exit(EXIT_SUCCESS);
4186 /* Arrange for message reception if recipients or SMTP were specified;
4187 otherwise complain unless a version print (-bV) happened or this is a filter
4188 verification test. In the former case, show the configuration file name. */
4190 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
4192 if (version_printed)
4194 printf("Configuration file is %s\n", config_main_filename);
4195 return EXIT_SUCCESS;
4197 if (filter_test == FTEST_NONE)
4200 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4201 "not directly from a shell command line. Options and/or arguments control\n"
4202 "what it does when called. For a list of options, see the Exim documentation.\n");
4203 return EXIT_FAILURE;
4208 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4209 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4210 that we are not called from inetd, because that is rejected above. The
4211 following configuration settings are forced here:
4213 (1) Synchronous delivery (-odi)
4214 (2) Errors to stderr (-oep == -oeq)
4215 (3) No parallel remote delivery
4216 (4) Unprivileged delivery
4218 We don't force overall queueing options because there are several of them;
4219 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4220 to override any SMTP queueing. */
4224 synchronous_delivery = TRUE;
4225 arg_error_handling = ERRORS_STDERR;
4226 remote_max_parallel = 1;
4227 deliver_drop_privilege = TRUE;
4229 queue_smtp_domains = NULL;
4233 /* Prepare to accept one or more new messages on the standard input. When a
4234 message has been read, its id is returned in message_id[]. If doing immediate
4235 delivery, we fork a delivery process for each received message, except for the
4236 last one, where we can save a process switch.
4238 It is only in non-smtp mode that error_handling is allowed to be changed from
4239 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4240 sendmail error modes other than -oem ever actually used? Later: yes.) */
4242 if (!smtp_input) error_handling = arg_error_handling;
4244 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4245 logging being sent down the socket and make an identd call to get the
4251 exim_nullstd(); /* Re-open to /dev/null */
4252 verify_get_ident(IDENT_PORT);
4253 host_build_sender_fullhost();
4254 set_process_info("handling incoming connection from %s via inetd",
4258 /* If the sender host address has been set, build sender_fullhost if it hasn't
4259 already been done (which it will have been for inetd). This caters for the
4260 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4261 so that the test for IP options is skipped for -bs input. */
4263 if (sender_host_address != NULL && sender_fullhost == NULL)
4265 host_build_sender_fullhost();
4266 set_process_info("handling incoming connection from %s via -oMa",
4268 sender_host_notsocket = TRUE;
4271 /* Otherwise, set the sender host as unknown except for inetd calls. This
4272 prevents host checking in the case of -bs not from inetd and also for -bS. */
4274 else if (!is_inetd) sender_host_unknown = TRUE;
4276 /* If stdout does not exist, then dup stdin to stdout. This can happen
4277 if exim is started from inetd. In this case fd 0 will be set to the socket,
4278 but fd 1 will not be set. This also happens for passed SMTP channels. */
4280 if (fstat(1, &statbuf) < 0) dup2(0, 1);
4282 /* Set up the incoming protocol name and the state of the program. Root
4283 is allowed to force received protocol via the -oMr option above, and if we are
4284 in a non-local SMTP state it means we have come via inetd and the process info
4285 has already been set up. We don't set received_protocol here for smtp input,
4286 as it varies according to batch/HELO/EHLO/AUTH/TLS. */
4290 if (sender_local) set_process_info("accepting a local SMTP message from <%s>",
4295 if (received_protocol == NULL)
4296 received_protocol = string_sprintf("local%s", called_as);
4297 set_process_info("accepting a local non-SMTP message from <%s>",
4301 /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is
4305 local_queue_only = queue_only;
4307 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4308 the spool if so configured. On failure, we must not attempt to send an error
4309 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4310 error code is given.) */
4312 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
4314 fprintf(stderr, "exim: insufficient disk space\n");
4315 return EXIT_FAILURE;
4318 /* If this is smtp input of any kind, handle the start of the SMTP
4325 if (verify_check_host(&hosts_connection_nolog) == OK)
4326 log_write_selector &= ~L_smtp_connection;
4327 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
4328 if (!smtp_start_session())
4331 exim_exit(EXIT_SUCCESS);
4335 /* Otherwise, set up the input size limit here */
4339 thismessage_size_limit = expand_string_integer(message_size_limit);
4340 if (thismessage_size_limit < 0)
4342 if (thismessage_size_limit == -1)
4343 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
4344 "message_size_limit: %s", expand_string_message);
4346 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
4347 "message_size_limit: %s", expand_string_message);
4351 /* Loop for several messages when reading SMTP input. If we fork any child
4352 processes, we don't want to wait for them unless synchronous delivery is
4353 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4354 same as SIG_DFL, despite the fact that documentation often lists the default as
4355 "ignore". This is a confusing area. This is what I know:
4357 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4358 processes that complete simply to go away without ever becoming defunct. You
4359 can't then wait for them - but we don't want to wait for them in the
4360 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4361 happen for all OS (e.g. *BSD is different).
4363 But that's not the end of the story. Some (many? all?) systems have the
4364 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4365 has by default, so it seems that the difference is merely one of default
4366 (compare restarting vs non-restarting signals).
4368 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4369 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4370 of the loop below. Paranoia rules.
4372 February 2003: That's *still* not the end of the story. There are now versions
4373 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4374 process then calls waitpid(), a grumble is written to the system log, because
4375 this is logically inconsistent. In other words, it doesn't like the paranoia.
4376 As a consequenc of this, the waitpid() below is now excluded if we are sure
4377 that SIG_IGN works. */
4379 if (!synchronous_delivery)
4382 struct sigaction act;
4383 act.sa_handler = SIG_IGN;
4384 sigemptyset(&(act.sa_mask));
4385 act.sa_flags = SA_NOCLDWAIT;
4386 sigaction(SIGCHLD, &act, NULL);
4388 signal(SIGCHLD, SIG_IGN);
4392 /* Save the current store pool point, for resetting at the start of
4393 each message, and save the real sender address, if any. */
4395 reset_point = store_get(0);
4396 real_sender_address = sender_address;
4398 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4399 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4404 store_reset(reset_point);
4407 /* In the SMTP case, we have to handle the initial SMTP input and build the
4408 recipients list, before calling receive_msg() to read the message proper.
4409 Whatever sender address is actually given in the SMTP transaction is
4410 actually ignored for local senders - we use the actual sender, which is
4411 normally either the underlying user running this process or a -f argument
4412 provided by a trusted caller. It is saved in real_sender_address.
4414 However, if this value is NULL, we are dealing with a trusted caller when
4415 -f was not used; in this case, the SMTP sender is allowed to stand.
4417 Also, if untrusted_set_sender is set, we permit sender addresses that match
4418 anything in its list.
4420 The variable raw_sender_address holds the sender address before rewriting. */
4425 if ((rc = smtp_setup_msg()) > 0)
4427 if (real_sender_address != NULL &&
4428 !receive_check_set_sender(sender_address))
4430 sender_address = raw_sender = real_sender_address;
4431 sender_address_unrewritten = NULL;
4433 more = receive_msg(extract_recipients);
4434 if (message_id[0] == 0)
4437 exim_exit(EXIT_FAILURE);
4440 else exim_exit((rc == 0)? EXIT_SUCCESS : EXIT_FAILURE);
4443 /* In the non-SMTP case, we have all the information from the command
4444 line, but must process it in case it is in the more general RFC822
4445 format, and in any case, to detect syntax errors. Also, it appears that
4446 the use of comma-separated lists as single arguments is common, so we
4447 had better support them. */
4453 int count = argc - recipients_arg;
4454 uschar **list = argv + recipients_arg;
4456 /* These options cannot be changed dynamically for non-SMTP messages */
4458 active_local_sender_retain = local_sender_retain;
4459 active_local_from_check = local_from_check;
4461 /* Save before any rewriting */
4463 raw_sender = string_copy(sender_address);
4465 /* Loop for each argument */
4467 for (i = 0; i < count; i++)
4469 int start, end, domain;
4471 uschar *s = list[i];
4473 /* Loop for each comma-separated address */
4477 BOOL finished = FALSE;
4479 uschar *ss = parse_find_address_end(s, FALSE);
4481 if (*ss == ',') *ss = 0; else finished = TRUE;
4483 /* Check max recipients - if -t was used, these aren't recipients */
4485 if (recipients_max > 0 && ++rcount > recipients_max &&
4486 !extract_recipients)
4488 if (error_handling == ERRORS_STDERR)
4490 fprintf(stderr, "exim: too many recipients\n");
4491 exim_exit(EXIT_FAILURE);
4496 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
4497 errors_sender_rc : EXIT_FAILURE;
4502 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
4504 if (domain == 0 && !allow_unqualified_recipient)
4507 errmess = US"unqualified recipient address not allowed";
4510 if (recipient == NULL)
4512 if (error_handling == ERRORS_STDERR)
4514 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
4515 string_printing(list[i]), errmess);
4516 exim_exit(EXIT_FAILURE);
4522 eblock.text1 = string_printing(list[i]);
4523 eblock.text2 = errmess;
4525 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
4526 errors_sender_rc : EXIT_FAILURE;
4530 receive_add_recipient(recipient, -1);
4533 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
4537 /* Show the recipients when debugging */
4542 if (sender_address != NULL) debug_printf("Sender: %s\n", sender_address);
4543 if (recipients_list != NULL)
4545 debug_printf("Recipients:\n");
4546 for (i = 0; i < recipients_count; i++)
4547 debug_printf(" %s\n", recipients_list[i].address);
4551 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4552 will just read the headers for the message, and not write anything onto the
4555 message_ended = END_NOTENDED;
4556 more = receive_msg(extract_recipients);
4558 /* more is always FALSE here (not SMTP message) when reading a message
4559 for real; when reading the headers of a message for filter testing,
4560 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4562 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
4563 } /* Non-SMTP message reception */
4565 /* If this is a filter testing run, there are headers in store, but
4566 no message on the spool. Run the filtering code in testing mode, setting
4567 the domain to the qualify domain and the local part to the current user,
4568 unless they have been set by options. The prefix and suffix are left unset
4569 unless specified. The the return path is set to to the sender unless it has
4570 already been set from a return-path header in the message. */
4572 if (filter_test != FTEST_NONE)
4574 deliver_domain = (ftest_domain != NULL)?
4575 ftest_domain : qualify_domain_recipient;
4576 deliver_domain_orig = deliver_domain;
4577 deliver_localpart = (ftest_localpart != NULL)?
4578 ftest_localpart : originator_login;
4579 deliver_localpart_orig = deliver_localpart;
4580 deliver_localpart_prefix = ftest_prefix;
4581 deliver_localpart_suffix = ftest_suffix;
4582 deliver_home = originator_home;
4584 if (return_path == NULL)
4586 printf("Return-path copied from sender\n");
4587 return_path = string_copy(sender_address);
4591 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
4593 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
4595 receive_add_recipient(
4596 string_sprintf("%s%s%s@%s",
4597 (ftest_prefix == NULL)? US"" : ftest_prefix,
4599 (ftest_suffix == NULL)? US"" : ftest_suffix,
4600 deliver_domain), -1);
4602 printf("Recipient = %s\n", recipients_list[0].address);
4603 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
4604 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
4606 chdir("/"); /* Get away from wherever the user is running this from */
4608 /* Now we run either a system filter test, or a user filter test, or both.
4609 In the latter case, headers added by the system filter will persist and be
4610 available to the user filter. We need to copy the filter variables
4613 if ((filter_test & FTEST_SYSTEM) != 0)
4615 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
4616 exim_exit(EXIT_FAILURE);
4619 memcpy(filter_sn, filter_n, sizeof(filter_sn));
4621 if ((filter_test & FTEST_USER) != 0)
4623 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
4624 exim_exit(EXIT_FAILURE);
4627 exim_exit(EXIT_SUCCESS);
4630 /* Else act on the result of message reception. We should not get here unless
4631 message_id[0] is non-zero. If queue_only is set, local_queue_only will be
4632 TRUE. If it is not, check on the number of messages received in this
4633 connection. If that's OK and queue_only_load is set, check that the load
4634 average is below it. If it is not, set local_queue_only TRUE. Note that it
4635 then remains this way for any subsequent messages on the same SMTP connection.
4636 This is a deliberate choice; even though the load average may fall, it
4637 doesn't seem right to deliver later messages on the same call when not
4638 delivering earlier ones. */
4640 if (!local_queue_only)
4642 if (smtp_accept_queue_per_connection > 0 &&
4643 receive_messagecount > smtp_accept_queue_per_connection)
4645 local_queue_only = TRUE;
4646 queue_only_reason = 2;
4648 else if (queue_only_load >= 0)
4650 local_queue_only = (load_average = os_getloadavg()) > queue_only_load;
4651 if (local_queue_only) queue_only_reason = 3;
4655 /* If running as an MUA wrapper, all queueing options and freezing options
4659 local_queue_only = queue_only_policy = deliver_freeze = FALSE;
4661 /* Log the queueing here, when it will get a message id attached, but
4662 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4665 if (local_queue_only) switch(queue_only_reason)
4668 log_write(L_delay_delivery,
4669 LOG_MAIN, "no immediate delivery: more than %d messages "
4670 "received in one connection", smtp_accept_queue_per_connection);
4674 log_write(L_delay_delivery,
4675 LOG_MAIN, "no immediate delivery: load average %.2f",
4676 (double)load_average/1000.0);
4680 /* Else do the delivery unless the ACL or local_scan() called for queue only
4681 or froze the message. Always deliver in a separate process. A fork failure is
4682 not a disaster, as the delivery will eventually happen on a subsequent queue
4683 run. The search cache must be tidied before the fork, as the parent will
4684 do it before exiting. The child will trigger a lookup failure and
4685 thereby defer the delivery if it tries to use (for example) a cached ldap
4686 connection that the parent has called unbind on. */
4688 else if (!queue_only_policy && !deliver_freeze)
4693 if ((pid = fork()) == 0)
4696 close_unwanted(); /* Close unwanted file descriptors and TLS */
4697 exim_nullstd(); /* Ensure std{in,out,err} exist */
4699 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
4700 mode, deliver_drop_privilege is forced TRUE). */
4702 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
4704 (void)child_exec_exim(CEE_EXEC_EXIT, FALSE, NULL, FALSE, 2, US"-Mc",
4706 /* Control does not return here. */
4709 /* No need to re-exec */
4711 rc = deliver_message(message_id, FALSE, FALSE);
4713 _exit((!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED)?
4714 EXIT_SUCCESS : EXIT_FAILURE);
4719 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
4720 "process: %s", strerror(errno));
4723 /* In the parent, wait if synchronous delivery is required. This will
4724 always be the case in MUA wrapper mode. */
4726 else if (synchronous_delivery)
4729 while (wait(&status) != pid);
4730 if ((status & 0x00ff) != 0)
4731 log_write(0, LOG_MAIN|LOG_PANIC,
4732 "process %d crashed with signal %d while delivering %s",
4733 (int)pid, status & 0x00ff, message_id);
4734 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
4738 /* The loop will repeat if more is TRUE. If we do not know know that the OS
4739 automatically reaps children (see comments above the loop), clear away any
4740 finished subprocesses here, in case there are lots of messages coming in
4741 from the same source. */
4743 #ifndef SIG_IGN_WORKS
4744 while (waitpid(-1, NULL, WNOHANG) > 0);
4748 exim_exit(EXIT_SUCCESS); /* Never returns */
4749 return 0; /* To stop compiler warning */