1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
30 extern void init_lookup_list(void);
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
47 function_store_get(size_t size)
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
55 function_dummy_free(void *block) { block = block; }
58 function_store_malloc(size_t size)
60 return store_malloc((int)size);
64 function_store_free(void *block)
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
97 Returns: pointer to the compiled pattern
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
104 int options = PCRE_COPT;
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
140 Returns: TRUE or FALSE
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
151 if (n == 0) n = EXPAND_MAXN + 1;
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
175 Arguments: format and arguments, as for printf()
180 set_process_info(const char *format, ...)
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
207 term_handler(int sig)
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
222 This function takes care to be signal-safe.
224 Argument: the signal number (SIGUSR1)
229 usr1_handler(int sig)
233 os_restarting_signal(sig, usr1_handler);
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
254 (void)write(fd, process_info, process_info_len);
260 /*************************************************
262 *************************************************/
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
274 Argument: the signal value (SIGALRM)
279 sigalrm_handler(int sig)
281 sig = sig; /* Keep picky compilers happy */
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval;
349 itval.it_interval.tv_sec = 0;
350 itval.it_interval.tv_usec = 0;
351 itval.it_value.tv_sec = msec/1000;
352 itval.it_value.tv_usec = (msec % 1000) * 1000;
358 /*************************************************
359 * Compare microsecond times *
360 *************************************************/
367 Returns: -1, 0, or +1
371 exim_tvcmp(struct timeval *t1, struct timeval *t2)
373 if (t1->tv_sec > t2->tv_sec) return +1;
374 if (t1->tv_sec < t2->tv_sec) return -1;
375 if (t1->tv_usec > t2->tv_usec) return +1;
376 if (t1->tv_usec < t2->tv_usec) return -1;
383 /*************************************************
384 * Clock tick wait function *
385 *************************************************/
387 #ifdef _POSIX_MONOTONIC_CLOCK
388 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
389 static struct timespec offset_ts;
392 exim_clock_init(void)
395 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
396 (void)gettimeofday(&tv, NULL);
397 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
398 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
399 if (offset_ts.tv_nsec >= 0) return;
401 offset_ts.tv_nsec += 1000*1000*1000;
406 /* Exim uses a time + a pid to generate a unique identifier in two places: its
407 message IDs, and in file names for maildir deliveries. Because some OS now
408 re-use pids within the same second, sub-second times are now being used.
409 However, for absolute certainty, we must ensure the clock has ticked before
410 allowing the relevant process to complete. At the time of implementation of
411 this code (February 2003), the speed of processors is such that the clock will
412 invariably have ticked already by the time a process has done its job. This
413 function prepares for the time when things are faster - and it also copes with
414 clocks that go backwards.
417 tgt_tv A timeval which was used to create uniqueness; its usec field
418 has been rounded down to the value of the resolution.
419 We want to be sure the current time is greater than this.
420 resolution The resolution that was used to divide the microseconds
421 (1 for maildir, larger for message ids)
427 exim_wait_tick(struct timeval * tgt_tv, int resolution)
429 struct timeval now_tv;
430 long int now_true_usec;
432 #ifdef _POSIX_MONOTONIC_CLOCK
433 struct timespec now_ts;
435 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
437 now_ts.tv_sec += offset_ts.tv_sec;
438 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
441 now_ts.tv_nsec -= 1000*1000*1000;
443 now_tv.tv_sec = now_ts.tv_sec;
444 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
445 now_tv.tv_usec = now_true_usec;
450 (void)gettimeofday(&now_tv, NULL);
451 now_true_usec = now_tv.tv_usec;
452 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
455 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
457 struct itimerval itval;
458 itval.it_interval.tv_sec = 0;
459 itval.it_interval.tv_usec = 0;
460 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
461 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
463 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
464 negative value for the microseconds is possible only in the case when "now"
465 is more than a second less than "tgt". That means that itval.it_value.tv_sec
466 is greater than zero. The following correction is therefore safe. */
468 if (itval.it_value.tv_usec < 0)
470 itval.it_value.tv_usec += 1000000;
471 itval.it_value.tv_sec -= 1;
474 DEBUG(D_transport|D_receive)
476 if (!f.running_in_test_harness)
478 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
479 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
480 now_tv.tv_sec, (long) now_tv.tv_usec);
481 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
482 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
488 /* Be prapared to go around if the kernel does not implement subtick
489 granularity (GNU Hurd) */
491 (void)gettimeofday(&now_tv, NULL);
492 now_true_usec = now_tv.tv_usec;
493 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
500 /*************************************************
501 * Call fopen() with umask 777 and adjust mode *
502 *************************************************/
504 /* Exim runs with umask(0) so that files created with open() have the mode that
505 is specified in the open() call. However, there are some files, typically in
506 the spool directory, that are created with fopen(). They end up world-writeable
507 if no precautions are taken. Although the spool directory is not accessible to
508 the world, this is an untidiness. So this is a wrapper function for fopen()
509 that sorts out the mode of the created file.
512 filename the file name
513 options the fopen() options
514 mode the required mode
516 Returns: the fopened FILE or NULL
520 modefopen(const uschar *filename, const char *options, mode_t mode)
522 mode_t saved_umask = umask(0777);
523 FILE *f = Ufopen(filename, options);
524 (void)umask(saved_umask);
525 if (f != NULL) (void)fchmod(fileno(f), mode);
530 /*************************************************
531 * Ensure stdin, stdout, and stderr exist *
532 *************************************************/
534 /* Some operating systems grumble if an exec() happens without a standard
535 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
536 file will be opened and will use these fd values, and then some other bit of
537 code will assume, for example, that it can write error messages to stderr.
538 This function ensures that fds 0, 1, and 2 are open if they do not already
539 exist, by connecting them to /dev/null.
541 This function is also used to ensure that std{in,out,err} exist at all times,
542 so that if any library that Exim calls tries to use them, it doesn't crash.
553 for (int i = 0; i <= 2; i++)
555 if (fstat(i, &statbuf) < 0 && errno == EBADF)
557 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
558 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
559 string_open_failed(errno, "/dev/null", NULL));
560 if (devnull != i) (void)dup2(devnull, i);
563 if (devnull > 2) (void)close(devnull);
569 /*************************************************
570 * Close unwanted file descriptors for delivery *
571 *************************************************/
573 /* This function is called from a new process that has been forked to deliver
574 an incoming message, either directly, or using exec.
576 We want any smtp input streams to be closed in this new process. However, it
577 has been observed that using fclose() here causes trouble. When reading in -bS
578 input, duplicate copies of messages have been seen. The files will be sharing a
579 file pointer with the parent process, and it seems that fclose() (at least on
580 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
581 least sometimes. Hence we go for closing the underlying file descriptors.
583 If TLS is active, we want to shut down the TLS library, but without molesting
584 the parent's SSL connection.
586 For delivery of a non-SMTP message, we want to close stdin and stdout (and
587 stderr unless debugging) because the calling process might have set them up as
588 pipes and be waiting for them to close before it waits for the submission
589 process to terminate. If they aren't closed, they hold up the calling process
590 until the initial delivery process finishes, which is not what we want.
592 Exception: We do want it for synchronous delivery!
594 And notwithstanding all the above, if D_resolver is set, implying resolver
595 debugging, leave stdout open, because that's where the resolver writes its
598 When we close stderr (which implies we've also closed stdout), we also get rid
599 of any controlling terminal.
611 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
613 (void)close(fileno(smtp_in));
614 (void)close(fileno(smtp_out));
619 (void)close(0); /* stdin */
620 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
621 if (debug_selector == 0) /* stderr */
623 if (!f.synchronous_delivery)
636 /*************************************************
638 *************************************************/
640 /* This function sets a new uid and gid permanently, optionally calling
641 initgroups() to set auxiliary groups. There are some special cases when running
642 Exim in unprivileged modes. In these situations the effective uid will not be
643 root; if we already have the right effective uid/gid, and don't need to
644 initialize any groups, leave things as they are.
649 igflag TRUE if initgroups() wanted
650 msg text to use in debugging output and failure log
652 Returns: nothing; bombs out on failure
656 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
658 uid_t euid = geteuid();
659 gid_t egid = getegid();
661 if (euid == root_uid || euid != uid || egid != gid || igflag)
663 /* At least one OS returns +1 for initgroups failure, so just check for
668 struct passwd *pw = getpwuid(uid);
670 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
671 "no passwd entry for uid=%ld", (long int)uid);
673 if (initgroups(pw->pw_name, gid) != 0)
674 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
675 (long int)uid, strerror(errno));
678 if (setgid(gid) < 0 || setuid(uid) < 0)
679 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
680 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
683 /* Debugging output included uid/gid and all groups */
687 int group_count, save_errno;
688 gid_t group_list[EXIM_GROUPLIST_SIZE];
689 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
690 (long int)geteuid(), (long int)getegid(), (long int)getpid());
691 group_count = getgroups(nelem(group_list), group_list);
693 debug_printf(" auxiliary group list:");
695 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
696 else if (group_count < 0)
697 debug_printf(" <error: %s>", strerror(save_errno));
698 else debug_printf(" <none>");
706 /*************************************************
708 *************************************************/
710 /* Exim exits via this function so that it always clears up any open
716 Returns: does not return
720 exim_exit(int rc, const uschar * process)
725 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
726 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
727 process ? "(" : "", process, process ? ") " : "", rc);
733 exim_underbar_exit(int rc, const uschar * process)
737 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
738 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
739 process ? "(" : "", process, process ? ") " : "", rc);
745 /* Print error string, then die */
747 exim_fail(const char * fmt, ...)
751 vfprintf(stderr, fmt, ap);
755 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
756 of chown()/fchown(). See src/functions.h for more explanation */
758 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
760 int saved_errno = errno; /* from the preceeding chown call */
762 log_write(0, LOG_MAIN|LOG_PANIC,
763 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
764 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
765 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
767 /* I leave this here, commented, in case the "bug"(?) comes up again.
768 It is not an Exim bug, but we can provide a workaround.
774 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
776 if (buf.st_uid == owner && buf.st_gid == group) return 0;
777 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
779 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
787 /*************************************************
788 * Extract port from host address *
789 *************************************************/
791 /* Called to extract the port from the values given to -oMa and -oMi.
792 It also checks the syntax of the address, and terminates it before the
793 port data when a port is extracted.
796 address the address, with possible port on the end
798 Returns: the port, or zero if there isn't one
799 bombs out on a syntax error
803 check_port(uschar *address)
805 int port = host_address_extract_port(address);
806 if (string_is_ip_address(address, NULL) == 0)
807 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
813 /*************************************************
814 * Test/verify an address *
815 *************************************************/
817 /* This function is called by the -bv and -bt code. It extracts a working
818 address from a full RFC 822 address. This isn't really necessary per se, but it
819 has the effect of collapsing source routes.
823 flags flag bits for verify_address()
824 exit_value to be set for failures
830 test_address(uschar *s, int flags, int *exit_value)
832 int start, end, domain;
833 uschar *parse_error = NULL;
834 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
838 fprintf(stdout, "syntax error: %s\n", parse_error);
843 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
844 -1, -1, NULL, NULL, NULL);
845 if (rc == FAIL) *exit_value = 2;
846 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
852 /*************************************************
853 * Show supported features *
854 *************************************************/
857 show_db_version(FILE * f)
859 #ifdef DB_VERSION_STRING
862 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
863 fprintf(f, " Runtime: %s\n",
864 db_version(NULL, NULL, NULL));
867 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
869 #elif defined(BTREEVERSION) && defined(HASHVERSION)
871 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
873 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
876 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
877 fprintf(f, "Probably ndbm\n");
878 #elif defined(USE_TDB)
879 fprintf(f, "Using tdb\n");
882 fprintf(f, "Probably GDBM (native mode)\n");
884 fprintf(f, "Probably GDBM (compatibility mode)\n");
890 /* This function is called for -bV/--version and for -d to output the optional
891 features of the current Exim binary.
893 Arguments: a FILE for printing
898 show_whats_supported(FILE * fp)
900 DEBUG(D_any) {} else show_db_version(fp);
902 fprintf(fp, "Support for:");
903 #ifdef SUPPORT_CRYPTEQ
904 fprintf(fp, " crypteq");
907 fprintf(fp, " iconv()");
910 fprintf(fp, " IPv6");
912 #ifdef HAVE_SETCLASSRESOURCES
913 fprintf(fp, " use_setclassresources");
919 fprintf(fp, " Perl");
922 fprintf(fp, " Expand_dlfunc");
924 #ifdef USE_TCP_WRAPPERS
925 fprintf(fp, " TCPwrappers");
928 fprintf(fp, " GnuTLS");
931 fprintf(fp, " OpenSSL");
933 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
934 fprintf(fp, " translate_ip_address");
936 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
937 fprintf(fp, " move_frozen_messages");
939 #ifdef WITH_CONTENT_SCAN
940 fprintf(fp, " Content_Scanning");
943 fprintf(fp, " DANE");
946 fprintf(fp, " DKIM");
948 #ifndef DISABLE_DNSSEC
949 fprintf(fp, " DNSSEC");
951 #ifndef DISABLE_EVENT
952 fprintf(fp, " Event");
955 fprintf(fp, " I18N");
958 fprintf(fp, " OCSP");
960 #ifndef DISABLE_PIPE_CONNECT
961 fprintf(fp, " PIPE_CONNECT");
964 fprintf(fp, " PRDR");
967 fprintf(fp, " PROXY");
970 fprintf(fp, " SOCKS");
976 fprintf(fp, " DMARC");
980 if (f.tcp_fastopen_ok) fprintf(fp, " TCP_Fast_Open");
982 #ifdef EXPERIMENTAL_ARC
983 fprintf(fp, " Experimental_ARC");
985 #ifdef EXPERIMENTAL_BRIGHTMAIL
986 fprintf(fp, " Experimental_Brightmail");
988 #ifdef EXPERIMENTAL_DCC
989 fprintf(fp, " Experimental_DCC");
991 #ifdef EXPERIMENTAL_DSN_INFO
992 fprintf(fp, " Experimental_DSN_info");
994 #ifdef EXPERIMENTAL_LMDB
995 fprintf(fp, " Experimental_LMDB");
997 #ifdef EXPERIMENTAL_QUEUE_RAMP
998 fprintf(fp, " Experimental_Queue_Ramp");
1000 #ifdef EXPERIMENTAL_QUEUEFILE
1001 fprintf(fp, " Experimental_QUEUEFILE");
1003 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1004 fprintf(fp, " Experimental_SRS");
1006 #ifdef EXPERIMENTAL_TLS_RESUME
1007 fprintf(fp, " Experimental_TLS_resume");
1011 fprintf(fp, "Lookups (built-in):");
1012 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1013 fprintf(fp, " lsearch wildlsearch nwildlsearch iplsearch");
1015 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1016 fprintf(fp, " cdb");
1018 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1019 fprintf(fp, " dbm dbmjz dbmnz");
1021 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1022 fprintf(fp, " dnsdb");
1024 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1025 fprintf(fp, " dsearch");
1027 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1028 fprintf(fp, " ibase");
1030 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1031 fprintf(fp, " json");
1033 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1034 fprintf(fp, " ldap ldapdn ldapm");
1036 #ifdef EXPERIMENTAL_LMDB
1037 fprintf(fp, " lmdb");
1039 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1040 fprintf(fp, " mysql");
1042 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1043 fprintf(fp, " nis nis0");
1045 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1046 fprintf(fp, " nisplus");
1048 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1049 fprintf(fp, " oracle");
1051 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1052 fprintf(fp, " passwd");
1054 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1055 fprintf(fp, " pgsql");
1057 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1058 fprintf(fp, " redis");
1060 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1061 fprintf(fp, " sqlite");
1063 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1064 fprintf(fp, " testdb");
1066 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1067 fprintf(fp, " whoson");
1071 auth_show_supported(fp);
1072 route_show_supported(fp);
1073 transport_show_supported(fp);
1075 #ifdef WITH_CONTENT_SCAN
1076 malware_show_supported(fp);
1079 if (fixed_never_users[0] > 0)
1082 fprintf(fp, "Fixed never_users: ");
1083 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1084 fprintf(fp, "%d:", (unsigned int)fixed_never_users[i]);
1085 fprintf(fp, "%d\n", (unsigned int)fixed_never_users[i]);
1088 fprintf(fp, "Configure owner: %d:%d\n", config_uid, config_gid);
1090 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1092 /* Everything else is details which are only worth reporting when debugging.
1093 Perhaps the tls_version_report should move into this too. */
1096 /* clang defines __GNUC__ (at least, for me) so test for it first */
1097 #if defined(__clang__)
1098 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1099 #elif defined(__GNUC__)
1100 fprintf(fp, "Compiler: GCC [%s]\n",
1104 "? unknown version ?"
1108 fprintf(fp, "Compiler: <unknown>\n");
1111 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1112 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1113 __GLIBC__, __GLIBC_MINOR__);
1114 if (__GLIBC_PREREQ(2, 1))
1115 fprintf(fp, " Runtime: %s\n",
1116 gnu_get_libc_version());
1119 show_db_version(fp);
1122 tls_version_report(fp);
1125 utf8_version_report(fp);
1128 spf_lib_version_report(fp);
1131 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1132 if (authi->version_report)
1133 (*authi->version_report)(fp);
1135 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1136 characters; unless it's an ancient version of PCRE in which case it
1138 #ifndef PCRE_PRERELEASE
1139 # define PCRE_PRERELEASE
1142 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1143 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1145 PCRE_MAJOR, PCRE_MINOR,
1146 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1149 #undef EXPAND_AND_QUOTE
1152 for (int i = 0; i < lookup_list_count; i++)
1153 if (lookup_list[i]->version_report)
1154 lookup_list[i]->version_report(fp);
1156 #ifdef WHITELIST_D_MACROS
1157 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1159 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1161 #ifdef TRUSTED_CONFIG_LIST
1162 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1164 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1171 /*************************************************
1172 * Show auxiliary information about Exim *
1173 *************************************************/
1176 show_exim_information(enum commandline_info request, FILE *stream)
1181 fprintf(stream, "Oops, something went wrong.\n");
1185 "The -bI: flag takes a string indicating which information to provide.\n"
1186 "If the string is not recognised, you'll get this help (on stderr).\n"
1188 " exim -bI:help this information\n"
1189 " exim -bI:dscp list of known dscp value keywords\n"
1190 " exim -bI:sieve list of supported sieve extensions\n"
1194 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1195 fprintf(stream, "%s\n", *pp);
1198 dscp_list_to_stream(stream);
1204 /*************************************************
1205 * Quote a local part *
1206 *************************************************/
1208 /* This function is used when a sender address or a From: or Sender: header
1209 line is being created from the caller's login, or from an authenticated_id. It
1210 applies appropriate quoting rules for a local part.
1212 Argument: the local part
1213 Returns: the local part, quoted if necessary
1217 local_part_quote(uschar *lpart)
1219 BOOL needs_quote = FALSE;
1222 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1224 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1225 (*t != '.' || t == lpart || t[1] == 0);
1228 if (!needs_quote) return lpart;
1230 g = string_catn(NULL, US"\"", 1);
1234 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1237 g = string_cat(g, lpart);
1240 g = string_catn(g, lpart, nq - lpart);
1241 g = string_catn(g, US"\\", 1);
1242 g = string_catn(g, nq, 1);
1246 g = string_catn(g, US"\"", 1);
1247 return string_from_gstring(g);
1253 /*************************************************
1254 * Load readline() functions *
1255 *************************************************/
1257 /* This function is called from testing executions that read data from stdin,
1258 but only when running as the calling user. Currently, only -be does this. The
1259 function loads the readline() function library and passes back the functions.
1260 On some systems, it needs the curses library, so load that too, but try without
1261 it if loading fails. All this functionality has to be requested at build time.
1264 fn_readline_ptr pointer to where to put the readline pointer
1265 fn_addhist_ptr pointer to where to put the addhistory function
1267 Returns: the dlopen handle or NULL on failure
1271 set_readline(char * (**fn_readline_ptr)(const char *),
1272 void (**fn_addhist_ptr)(const char *))
1275 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1277 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1278 if (dlhandle_curses) dlclose(dlhandle_curses);
1282 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1283 * char * readline (const char *prompt);
1284 * void add_history (const char *string);
1286 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1287 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1290 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1298 /*************************************************
1299 * Get a line from stdin for testing things *
1300 *************************************************/
1302 /* This function is called when running tests that can take a number of lines
1303 of input (for example, -be and -bt). It handles continuations and trailing
1304 spaces. And prompting and a blank line output on eof. If readline() is in use,
1305 the arguments are non-NULL and provide the relevant functions.
1308 fn_readline readline function or NULL
1309 fn_addhist addhist function or NULL
1311 Returns: pointer to dynamic memory, or NULL at end of file
1315 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1319 if (!fn_readline) { printf("> "); fflush(stdout); }
1321 for (int i = 0;; i++)
1323 uschar buffer[1024];
1327 char *readline_line = NULL;
1330 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1331 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1332 p = US readline_line;
1337 /* readline() not in use */
1340 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1344 /* Handle the line */
1346 ss = p + (int)Ustrlen(p);
1347 while (ss > p && isspace(ss[-1])) ss--;
1350 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1352 g = string_catn(g, p, ss - p);
1355 if (fn_readline) free(readline_line);
1358 /* g can only be NULL if ss==p */
1359 if (ss == p || g->s[g->ptr-1] != '\\')
1363 (void) string_from_gstring(g);
1366 if (!g) printf("\n");
1367 return string_from_gstring(g);
1372 /*************************************************
1373 * Output usage information for the program *
1374 *************************************************/
1376 /* This function is called when there are no recipients
1377 or a specific --help argument was added.
1380 progname information on what name we were called by
1382 Returns: DOES NOT RETURN
1386 exim_usage(uschar *progname)
1389 /* Handle specific program invocation variants */
1390 if (Ustrcmp(progname, US"-mailq") == 0)
1392 "mailq - list the contents of the mail queue\n\n"
1393 "For a list of options, see the Exim documentation.\n");
1395 /* Generic usage - we output this whatever happens */
1397 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1398 "not directly from a shell command line. Options and/or arguments control\n"
1399 "what it does when called. For a list of options, see the Exim documentation.\n");
1404 /*************************************************
1405 * Validate that the macros given are okay *
1406 *************************************************/
1408 /* Typically, Exim will drop privileges if macros are supplied. In some
1409 cases, we want to not do so.
1411 Arguments: opt_D_used - true if the commandline had a "-D" option
1412 Returns: true if trusted, false otherwise
1416 macros_trusted(BOOL opt_D_used)
1418 #ifdef WHITELIST_D_MACROS
1419 uschar *whitelisted, *end, *p, **whites;
1420 int white_count, i, n;
1422 BOOL prev_char_item, found;
1427 #ifndef WHITELIST_D_MACROS
1431 /* We only trust -D overrides for some invoking users:
1432 root, the exim run-time user, the optional config owner user.
1433 I don't know why config-owner would be needed, but since they can own the
1434 config files anyway, there's no security risk to letting them override -D. */
1435 if ( ! ((real_uid == root_uid)
1436 || (real_uid == exim_uid)
1437 #ifdef CONFIGURE_OWNER
1438 || (real_uid == config_uid)
1442 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1446 /* Get a list of macros which are whitelisted */
1447 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1448 prev_char_item = FALSE;
1450 for (p = whitelisted; *p != '\0'; ++p)
1452 if (*p == ':' || isspace(*p))
1457 prev_char_item = FALSE;
1460 if (!prev_char_item)
1461 prev_char_item = TRUE;
1468 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1469 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1474 if (i == white_count)
1476 while (*p != '\0' && p < end)
1482 /* The list of commandline macros should be very short.
1483 Accept the N*M complexity. */
1484 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1487 for (uschar ** w = whites; *w; ++w)
1488 if (Ustrcmp(*w, m->name) == 0)
1495 if (!m->replacement)
1497 if ((len = m->replen) == 0)
1499 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1500 0, PCRE_EOPT, NULL, 0);
1503 if (n != PCRE_ERROR_NOMATCH)
1504 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1508 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1514 /*************************************************
1515 * Expansion testing *
1516 *************************************************/
1518 /* Expand and print one item, doing macro-processing.
1521 item line for expansion
1525 expansion_test_line(uschar * line)
1530 Ustrncpy(big_buffer, line, big_buffer_size);
1531 big_buffer[big_buffer_size-1] = '\0';
1532 len = Ustrlen(big_buffer);
1534 (void) macros_expand(0, &len, &dummy_macexp);
1536 if (isupper(big_buffer[0]))
1538 if (macro_read_assignment(big_buffer))
1539 printf("Defined macro '%s'\n", mlast->name);
1542 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1543 else printf("Failed: %s\n", expand_string_message);
1548 /*************************************************
1549 * Entry point and high-level code *
1550 *************************************************/
1552 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1553 the appropriate action. All the necessary functions are present in the one
1554 binary. I originally thought one should split it up, but it turns out that so
1555 much of the apparatus is needed in each chunk that one might as well just have
1556 it all available all the time, which then makes the coding easier as well.
1559 argc count of entries in argv
1560 argv argument strings, with argv[0] being the program name
1562 Returns: EXIT_SUCCESS if terminated successfully
1563 EXIT_FAILURE otherwise, except when a message has been sent
1564 to the sender, and -oee was given
1568 main(int argc, char **cargv)
1570 uschar **argv = USS cargv;
1571 int arg_receive_timeout = -1;
1572 int arg_smtp_receive_timeout = -1;
1573 int arg_error_handling = error_handling;
1574 int filter_sfd = -1;
1575 int filter_ufd = -1;
1578 int list_queue_option = 0;
1580 int msg_action_arg = -1;
1581 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1582 int queue_only_reason = 0;
1584 int perl_start_option = 0;
1586 int recipients_arg = argc;
1587 int sender_address_domain = 0;
1588 int test_retry_arg = -1;
1589 int test_rewrite_arg = -1;
1590 gid_t original_egid;
1591 BOOL arg_queue_only = FALSE;
1592 BOOL bi_option = FALSE;
1593 BOOL checking = FALSE;
1594 BOOL count_queue = FALSE;
1595 BOOL expansion_test = FALSE;
1596 BOOL extract_recipients = FALSE;
1597 BOOL flag_G = FALSE;
1598 BOOL flag_n = FALSE;
1599 BOOL forced_delivery = FALSE;
1600 BOOL f_end_dot = FALSE;
1601 BOOL deliver_give_up = FALSE;
1602 BOOL list_queue = FALSE;
1603 BOOL list_options = FALSE;
1604 BOOL list_config = FALSE;
1605 BOOL local_queue_only;
1607 BOOL one_msg_action = FALSE;
1608 BOOL opt_D_used = FALSE;
1609 BOOL queue_only_set = FALSE;
1610 BOOL receiving_message = TRUE;
1611 BOOL sender_ident_set = FALSE;
1612 BOOL session_local_queue_only;
1614 BOOL removed_privilege = FALSE;
1615 BOOL usage_wanted = FALSE;
1616 BOOL verify_address_mode = FALSE;
1617 BOOL verify_as_sender = FALSE;
1618 BOOL version_printed = FALSE;
1619 uschar *alias_arg = NULL;
1620 uschar *called_as = US"";
1621 uschar *cmdline_syslog_name = NULL;
1622 uschar *start_queue_run_id = NULL;
1623 uschar *stop_queue_run_id = NULL;
1624 uschar *expansion_test_message = NULL;
1625 uschar *ftest_domain = NULL;
1626 uschar *ftest_localpart = NULL;
1627 uschar *ftest_prefix = NULL;
1628 uschar *ftest_suffix = NULL;
1629 uschar *log_oneline = NULL;
1630 uschar *malware_test_file = NULL;
1631 uschar *real_sender_address;
1632 uschar *originator_home = US"/";
1637 struct stat statbuf;
1638 pid_t passed_qr_pid = (pid_t)0;
1639 int passed_qr_pipe = -1;
1640 gid_t group_list[EXIM_GROUPLIST_SIZE];
1642 /* For the -bI: flag */
1643 enum commandline_info info_flag = CMDINFO_NONE;
1644 BOOL info_stdout = FALSE;
1646 /* Possible options for -R and -S */
1648 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1650 /* Need to define this in case we need to change the environment in order
1651 to get rid of a bogus time zone. We have to make it char rather than uschar
1652 because some OS define it in /usr/include/unistd.h. */
1654 extern char **environ;
1656 #ifdef MEASURE_TIMING
1657 (void)gettimeofday(×tamp_startup, NULL);
1660 /* If the Exim user and/or group and/or the configuration file owner/group were
1661 defined by ref:name at build time, we must now find the actual uid/gid values.
1662 This is a feature to make the lives of binary distributors easier. */
1664 #ifdef EXIM_USERNAME
1665 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1668 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1670 /* If ref:name uses a number as the name, route_finduser() returns
1671 TRUE with exim_uid set and pw coerced to NULL. */
1673 exim_gid = pw->pw_gid;
1674 #ifndef EXIM_GROUPNAME
1677 "exim: ref:name should specify a usercode, not a group.\n"
1678 "exim: can't let you get away with it unless you also specify a group.\n");
1682 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1685 #ifdef EXIM_GROUPNAME
1686 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1687 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1690 #ifdef CONFIGURE_OWNERNAME
1691 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1692 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1693 CONFIGURE_OWNERNAME);
1696 /* We default the system_filter_user to be the Exim run-time user, as a
1697 sane non-root value. */
1698 system_filter_uid = exim_uid;
1700 #ifdef CONFIGURE_GROUPNAME
1701 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1702 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1703 CONFIGURE_GROUPNAME);
1706 /* In the Cygwin environment, some initialization used to need doing.
1707 It was fudged in by means of this macro; now no longer but we'll leave
1708 it in case of others. */
1714 /* Check a field which is patched when we are running Exim within its
1715 testing harness; do a fast initial check, and then the whole thing. */
1717 f.running_in_test_harness =
1718 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1719 if (f.running_in_test_harness)
1722 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1723 at the start of a program; however, it seems that some environments do not
1724 follow this. A "strange" locale can affect the formatting of timestamps, so we
1727 setlocale(LC_ALL, "C");
1729 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1731 #ifdef _POSIX_MONOTONIC_CLOCK
1735 /* Set up the default handler for timing using alarm(). */
1737 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1739 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1740 because store_malloc writes a log entry on failure. */
1742 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1743 exim_fail("exim: failed to get store for log buffer\n");
1745 /* Initialize the default log options. */
1747 bits_set(log_selector, log_selector_size, log_default);
1749 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1750 NULL when the daemon is run and the file is closed. We have to use this
1751 indirection, because some systems don't allow writing to the variable "stderr".
1754 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1756 /* Arrange for the PCRE regex library to use our store functions. Note that
1757 the normal calls are actually macros that add additional arguments for
1758 debugging purposes so we have to assign specially constructed functions here.
1759 The default is to use store in the stacking pool, but this is overridden in the
1760 regex_must_compile() function. */
1762 pcre_malloc = function_store_get;
1763 pcre_free = function_dummy_free;
1765 /* Ensure there is a big buffer for temporary use in several places. It is put
1766 in malloc store so that it can be freed for enlargement if necessary. */
1768 big_buffer = store_malloc(big_buffer_size);
1770 /* Set up the handler for the data request signal, and set the initial
1771 descriptive text. */
1773 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1774 set_process_info("initializing");
1775 os_restarting_signal(SIGUSR1, usr1_handler);
1777 /* If running in a dockerized environment, the TERM signal is only
1778 delegated to the PID 1 if we request it by setting an signal handler */
1779 if (getpid() == 1) signal(SIGTERM, term_handler);
1781 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1782 in the daemon code. For the rest of Exim's uses, we ignore it. */
1784 signal(SIGHUP, SIG_IGN);
1786 /* We don't want to die on pipe errors as the code is written to handle
1787 the write error instead. */
1789 signal(SIGPIPE, SIG_IGN);
1791 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1792 set to SIG_IGN. This causes subprocesses that complete before the parent
1793 process waits for them not to hang around, so when Exim calls wait(), nothing
1794 is there. The wait() code has been made robust against this, but let's ensure
1795 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1796 ending status. We use sigaction rather than plain signal() on those OS where
1797 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1798 problem on AIX with this.) */
1802 struct sigaction act;
1803 act.sa_handler = SIG_DFL;
1804 sigemptyset(&(act.sa_mask));
1806 sigaction(SIGCHLD, &act, NULL);
1809 signal(SIGCHLD, SIG_DFL);
1812 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1817 /* Set up the version number. Set up the leading 'E' for the external form of
1818 message ids, set the pointer to the internal form, and initialize it to
1819 indicate no message being processed. */
1822 message_id_option[0] = '-';
1823 message_id_external = message_id_option + 1;
1824 message_id_external[0] = 'E';
1825 message_id = message_id_external + 1;
1828 /* Set the umask to zero so that any files Exim creates using open() are
1829 created with the modes that it specifies. NOTE: Files created with fopen() have
1830 a problem, which was not recognized till rather late (February 2006). With this
1831 umask, such files will be world writeable. (They are all content scanning files
1832 in the spool directory, which isn't world-accessible, so this is not a
1833 disaster, but it's untidy.) I don't want to change this overall setting,
1834 however, because it will interact badly with the open() calls. Instead, there's
1835 now a function called modefopen() that fiddles with the umask while calling
1840 /* Precompile the regular expression for matching a message id. Keep this in
1841 step with the code that generates ids in the accept.c module. We need to do
1842 this here, because the -M options check their arguments for syntactic validity
1843 using mac_ismsgid, which uses this. */
1846 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1848 /* Precompile the regular expression that is used for matching an SMTP error
1849 code, possibly extended, at the start of an error message. Note that the
1850 terminating whitespace character is included. */
1853 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1856 #ifdef WHITELIST_D_MACROS
1857 /* Precompile the regular expression used to filter the content of macros
1858 given to -D for permissibility. */
1860 regex_whitelisted_macro =
1861 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1864 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1866 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1867 this seems to be a generally accepted convention, since one finds symbolic
1868 links called "mailq" in standard OS configurations. */
1870 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1871 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1874 receiving_message = FALSE;
1875 called_as = US"-mailq";
1878 /* If the program is called as "rmail" treat it as equivalent to
1879 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1880 i.e. preventing a single dot on a line from terminating the message, and
1881 returning with zero return code, even in cases of error (provided an error
1882 message has been sent). */
1884 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1885 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1888 called_as = US"-rmail";
1889 errors_sender_rc = EXIT_SUCCESS;
1892 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1893 this is a smail convention. */
1895 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1896 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1898 smtp_input = smtp_batched_input = TRUE;
1899 called_as = US"-rsmtp";
1902 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1903 this is a smail convention. */
1905 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1906 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1909 receiving_message = FALSE;
1910 called_as = US"-runq";
1913 /* If the program is called as "newaliases" treat it as equivalent to
1914 "exim -bi"; this is a sendmail convention. */
1916 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1917 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1920 receiving_message = FALSE;
1921 called_as = US"-newaliases";
1924 /* Save the original effective uid for a couple of uses later. It should
1925 normally be root, but in some esoteric environments it may not be. */
1927 original_euid = geteuid();
1928 original_egid = getegid();
1930 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1931 to be the same as the real ones. This makes a difference only if Exim is setuid
1932 (or setgid) to something other than root, which could be the case in some
1933 special configurations. */
1935 real_uid = getuid();
1936 real_gid = getgid();
1938 if (real_uid == root_uid)
1940 if ((rv = setgid(real_gid)))
1941 exim_fail("exim: setgid(%ld) failed: %s\n",
1942 (long int)real_gid, strerror(errno));
1943 if ((rv = setuid(real_uid)))
1944 exim_fail("exim: setuid(%ld) failed: %s\n",
1945 (long int)real_uid, strerror(errno));
1948 /* If neither the original real uid nor the original euid was root, Exim is
1949 running in an unprivileged state. */
1951 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1953 /* Scan the program's arguments. Some can be dealt with right away; others are
1954 simply recorded for checking and handling afterwards. Do a high-level switch
1955 on the second character (the one after '-'), to save some effort. */
1957 for (i = 1; i < argc; i++)
1959 BOOL badarg = FALSE;
1960 uschar * arg = argv[i];
1964 /* An argument not starting with '-' is the start of a recipients list;
1965 break out of the options-scanning loop. */
1973 /* An option consisting of -- terminates the options */
1975 if (Ustrcmp(arg, "--") == 0)
1977 recipients_arg = i + 1;
1981 /* Handle flagged options */
1983 switchchar = arg[1];
1986 /* Make all -ex options synonymous with -oex arguments, since that
1987 is assumed by various callers. Also make -qR options synonymous with -R
1988 options, as that seems to be required as well. Allow for -qqR too, and
1989 the same for -S options. */
1991 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1992 Ustrncmp(arg+1, "qR", 2) == 0 ||
1993 Ustrncmp(arg+1, "qS", 2) == 0)
1995 switchchar = arg[2];
1998 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2000 switchchar = arg[3];
2002 f.queue_2stage = TRUE;
2005 /* Make -r synonymous with -f, since it is a documented alias */
2007 else if (arg[1] == 'r') switchchar = 'f';
2009 /* Make -ov synonymous with -v */
2011 else if (Ustrcmp(arg, "-ov") == 0)
2017 /* deal with --option_aliases */
2018 else if (switchchar == '-')
2020 if (Ustrcmp(argrest, "help") == 0)
2022 usage_wanted = TRUE;
2025 else if (Ustrcmp(argrest, "version") == 0)
2032 /* High-level switch on active initial letter */
2037 /* sendmail uses -Ac and -Am to control which .cf file is used;
2040 if (!*argrest) { badarg = TRUE; break; }
2043 BOOL ignore = FALSE;
2048 if (*(argrest + 1) == '\0')
2052 if (!ignore) badarg = TRUE;
2056 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2057 so has no need of it. */
2060 if (!*argrest) i++; /* Skip over the type */
2066 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2070 /* -bd: Run in daemon mode, awaiting SMTP connections.
2071 -bdf: Ditto, but in the foreground.
2074 f.daemon_listen = TRUE;
2075 if (*argrest == 'f') f.background_daemon = FALSE;
2076 else if (*argrest) badarg = TRUE;
2079 /* -be: Run in expansion test mode
2080 -bem: Ditto, but read a message from a file first
2083 expansion_test = checking = TRUE;
2084 if (*argrest == 'm')
2086 if (++i >= argc) { badarg = TRUE; break; }
2087 expansion_test_message = argv[i];
2090 if (*argrest) badarg = TRUE;
2093 /* -bF: Run system filter test */
2095 filter_test |= checking = FTEST_SYSTEM;
2096 if (*argrest) badarg = TRUE;
2097 else if (++i < argc) filter_test_sfile = argv[i];
2098 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2101 /* -bf: Run user filter test
2102 -bfd: Set domain for filter testing
2103 -bfl: Set local part for filter testing
2104 -bfp: Set prefix for filter testing
2105 -bfs: Set suffix for filter testing
2110 filter_test |= checking = FTEST_USER;
2111 if (++i < argc) filter_test_ufile = argv[i];
2112 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2117 exim_fail("exim: string expected after %s\n", arg);
2118 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2119 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2120 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2121 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2126 /* -bh: Host checking - an IP address must follow. */
2128 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2130 if (++i >= argc) { badarg = TRUE; break; }
2131 sender_host_address = string_copy_taint(argv[i], TRUE);
2132 host_checking = checking = f.log_testing_mode = TRUE;
2133 f.host_checking_callout = *argrest == 'c';
2134 message_logs = FALSE;
2139 /* -bi: This option is used by sendmail to initialize *the* alias file,
2140 though it has the -oA option to specify a different file. Exim has no
2141 concept of *the* alias file, but since Sun's YP make script calls
2142 sendmail this way, some support must be provided. */
2144 if (!*++argrest) bi_option = TRUE;
2148 /* -bI: provide information, of the type to follow after a colon.
2149 This is an Exim flag. */
2151 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2153 uschar *p = argrest+1;
2154 info_flag = CMDINFO_HELP;
2156 if (strcmpic(p, CUS"sieve") == 0)
2158 info_flag = CMDINFO_SIEVE;
2161 else if (strcmpic(p, CUS"dscp") == 0)
2163 info_flag = CMDINFO_DSCP;
2166 else if (strcmpic(p, CUS"help") == 0)
2172 /* -bm: Accept and deliver message - the default option. Reinstate
2173 receiving_message, which got turned off for all -b options.
2174 -bmalware: test the filename given for malware */
2176 if (!*argrest) receiving_message = TRUE;
2177 else if (Ustrcmp(argrest, "alware") == 0)
2179 if (++i >= argc) { badarg = TRUE; break; }
2181 malware_test_file = argv[i];
2186 /* -bnq: For locally originating messages, do not qualify unqualified
2187 addresses. In the envelope, this causes errors; in header lines they
2190 if (Ustrcmp(argrest, "q") == 0)
2192 f.allow_unqualified_sender = FALSE;
2193 f.allow_unqualified_recipient = FALSE;
2198 /* -bpxx: List the contents of the mail queue, in various forms. If
2199 the option is -bpc, just a queue count is needed. Otherwise, if the
2200 first letter after p is r, then order is random. */
2202 if (*argrest == 'c')
2205 if (*++argrest) badarg = TRUE;
2209 if (*argrest == 'r')
2211 list_queue_option = 8;
2214 else list_queue_option = 0;
2218 /* -bp: List the contents of the mail queue, top-level only */
2222 /* -bpu: List the contents of the mail queue, top-level undelivered */
2224 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2226 /* -bpa: List the contents of the mail queue, including all delivered */
2228 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2230 /* Unknown after -bp[r] */
2236 /* -bP: List the configuration variables given as the address list.
2237 Force -v, so configuration errors get displayed. */
2240 /* -bP config: we need to setup here, because later,
2241 * when list_options is checked, the config is read already */
2244 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2247 readconf_save_config(version_string);
2251 list_options = TRUE;
2252 debug_selector |= D_v;
2253 debug_file = stderr;
2257 /* -brt: Test retry configuration lookup */
2259 if (Ustrcmp(argrest, "t") == 0)
2262 test_retry_arg = i + 1;
2266 /* -brw: Test rewrite configuration */
2268 else if (Ustrcmp(argrest, "w") == 0)
2271 test_rewrite_arg = i + 1;
2277 /* -bS: Read SMTP commands on standard input, but produce no replies -
2278 all errors are reported by sending messages. */
2281 smtp_input = smtp_batched_input = receiving_message = TRUE;
2285 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2286 on standard output. */
2288 if (!*argrest) smtp_input = receiving_message = TRUE;
2292 /* -bt: address testing mode */
2295 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2299 /* -bv: verify addresses */
2302 verify_address_mode = checking = f.log_testing_mode = TRUE;
2304 /* -bvs: verify sender addresses */
2306 else if (Ustrcmp(argrest, "s") == 0)
2308 verify_address_mode = checking = f.log_testing_mode = TRUE;
2309 verify_as_sender = TRUE;
2314 /* -bV: Print version string and support details */
2318 printf("Exim version %s #%s built %s\n", version_string,
2319 version_cnumber, version_date);
2320 printf("%s\n", CS version_copyright);
2321 version_printed = TRUE;
2322 show_whats_supported(stdout);
2323 f.log_testing_mode = TRUE;
2328 /* -bw: inetd wait mode, accept a listening socket as stdin */
2330 f.inetd_wait_mode = TRUE;
2331 f.background_daemon = FALSE;
2332 f.daemon_listen = TRUE;
2334 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2335 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2346 /* -C: change configuration file list; ignore if it isn't really
2347 a change! Enforce a prefix check if required. */
2351 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2352 if (Ustrcmp(config_main_filelist, argrest) != 0)
2354 #ifdef ALT_CONFIG_PREFIX
2356 int len = Ustrlen(ALT_CONFIG_PREFIX);
2357 const uschar *list = argrest;
2359 while((filename = string_nextinlist(&list, &sep, big_buffer,
2361 if ( ( Ustrlen(filename) < len
2362 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2363 || Ustrstr(filename, "/../") != NULL
2365 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2367 exim_fail("-C Permission denied\n");
2369 if (real_uid != root_uid)
2371 #ifdef TRUSTED_CONFIG_LIST
2373 if (real_uid != exim_uid
2374 #ifdef CONFIGURE_OWNER
2375 && real_uid != config_uid
2378 f.trusted_config = FALSE;
2381 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2384 struct stat statbuf;
2386 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2387 (statbuf.st_uid != root_uid /* owner not root */
2388 #ifdef CONFIGURE_OWNER
2389 && statbuf.st_uid != config_uid /* owner not the special one */
2392 (statbuf.st_gid != root_gid /* group not root */
2393 #ifdef CONFIGURE_GROUP
2394 && statbuf.st_gid != config_gid /* group not the special one */
2396 && (statbuf.st_mode & 020) != 0 /* group writeable */
2398 (statbuf.st_mode & 2) != 0) /* world writeable */
2400 f.trusted_config = FALSE;
2405 /* Well, the trust list at least is up to scratch... */
2406 rmark reset_point = store_mark();
2407 uschar *trusted_configs[32];
2411 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2413 uschar *start = big_buffer, *nl;
2414 while (*start && isspace(*start))
2418 nl = Ustrchr(start, '\n');
2421 trusted_configs[nr_configs++] = string_copy(start);
2422 if (nr_configs == nelem(trusted_configs))
2430 const uschar *list = argrest;
2432 while (f.trusted_config && (filename = string_nextinlist(&list,
2433 &sep, big_buffer, big_buffer_size)))
2435 for (i=0; i < nr_configs; i++)
2436 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2438 if (i == nr_configs)
2440 f.trusted_config = FALSE;
2445 else /* No valid prefixes found in trust_list file. */
2446 f.trusted_config = FALSE;
2447 store_reset(reset_point);
2450 else /* Could not open trust_list file. */
2451 f.trusted_config = FALSE;
2454 /* Not root; don't trust config */
2455 f.trusted_config = FALSE;
2459 config_main_filelist = argrest;
2460 f.config_changed = TRUE;
2465 /* -D: set up a macro definition */
2468 #ifdef DISABLE_D_OPTION
2469 exim_fail("exim: -D is not available in this Exim binary\n");
2475 uschar *s = argrest;
2478 while (isspace(*s)) s++;
2480 if (*s < 'A' || *s > 'Z')
2481 exim_fail("exim: macro name set by -D must start with "
2482 "an upper case letter\n");
2484 while (isalnum(*s) || *s == '_')
2486 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2490 if (ptr == 0) { badarg = TRUE; break; }
2491 while (isspace(*s)) s++;
2494 if (*s++ != '=') { badarg = TRUE; break; }
2495 while (isspace(*s)) s++;
2498 for (m = macros_user; m; m = m->next)
2499 if (Ustrcmp(m->name, name) == 0)
2500 exim_fail("exim: duplicated -D in command line\n");
2502 m = macro_create(name, s, TRUE);
2504 if (clmacro_count >= MAX_CLMACROS)
2505 exim_fail("exim: too many -D options on command line\n");
2506 clmacros[clmacro_count++] =
2507 string_sprintf("-D%s=%s", m->name, m->replacement);
2512 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2513 The latter is now a no-op, retained for compatibility only. If -dd is used,
2514 debugging subprocesses of the daemon is disabled. */
2517 if (Ustrcmp(argrest, "ropcr") == 0)
2519 /* drop_cr = TRUE; */
2522 /* Use an intermediate variable so that we don't set debugging while
2523 decoding the debugging bits. */
2527 unsigned int selector = D_default;
2530 if (*argrest == 'd')
2532 f.debug_daemon = TRUE;
2536 decode_bits(&selector, 1, debug_notall, argrest,
2537 debug_options, debug_options_count, US"debug", 0);
2538 debug_selector = selector;
2543 /* -E: This is a local error message. This option is not intended for
2544 external use at all, but is not restricted to trusted callers because it
2545 does no harm (just suppresses certain error messages) and if Exim is run
2546 not setuid root it won't always be trusted when it generates error
2547 messages using this option. If there is a message id following -E, point
2548 message_reference at it, for logging. */
2551 f.local_error_message = TRUE;
2552 if (mac_ismsgid(argrest)) message_reference = argrest;
2556 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2557 option, so it looks as if historically the -oex options are also callable
2558 without the leading -o. So we have to accept them. Before the switch,
2559 anything starting -oe has been converted to -e. Exim does not support all
2560 of the sendmail error options. */
2563 if (Ustrcmp(argrest, "e") == 0)
2565 arg_error_handling = ERRORS_SENDER;
2566 errors_sender_rc = EXIT_SUCCESS;
2568 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2569 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2570 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2571 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2576 /* -F: Set sender's full name, used instead of the gecos entry from
2577 the password file. Since users can usually alter their gecos entries,
2578 there's no security involved in using this instead. The data can follow
2579 the -F or be in the next argument. */
2583 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2584 originator_name = string_copy_taint(argrest, TRUE);
2585 f.sender_name_forced = TRUE;
2589 /* -f: Set sender's address - this value is only actually used if Exim is
2590 run by a trusted user, or if untrusted_set_sender is set and matches the
2591 address, except that the null address can always be set by any user. The
2592 test for this happens later, when the value given here is ignored when not
2593 permitted. For an untrusted user, the actual sender is still put in Sender:
2594 if it doesn't match the From: header (unless no_local_from_check is set).
2595 The data can follow the -f or be in the next argument. The -r switch is an
2596 obsolete form of -f but since there appear to be programs out there that
2597 use anything that sendmail has ever supported, better accept it - the
2598 synonymizing is done before the switch above.
2600 At this stage, we must allow domain literal addresses, because we don't
2601 know what the setting of allow_domain_literals is yet. Ditto for trailing
2602 dots and strip_trailing_dot. */
2606 int dummy_start, dummy_end;
2609 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2611 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2614 uschar * temp = argrest + Ustrlen(argrest) - 1;
2615 while (temp >= argrest && isspace(*temp)) temp--;
2616 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2617 allow_domain_literals = TRUE;
2618 strip_trailing_dot = TRUE;
2620 allow_utf8_domains = TRUE;
2622 if (!(sender_address = parse_extract_address(argrest, &errmess,
2623 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2624 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2626 sender_address = string_copy_taint(sender_address, TRUE);
2628 message_smtputf8 = string_is_utf8(sender_address);
2629 allow_utf8_domains = FALSE;
2631 allow_domain_literals = FALSE;
2632 strip_trailing_dot = FALSE;
2634 f.sender_address_forced = TRUE;
2638 /* -G: sendmail invocation to specify that it's a gateway submission and
2639 sendmail may complain about problems instead of fixing them.
2640 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2641 not at this time complain about problems. */
2647 /* -h: Set the hop count for an incoming message. Exim does not currently
2648 support this; it always computes it by counting the Received: headers.
2649 To put it in will require a change to the spool header file format. */
2653 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2654 if (!isdigit(*argrest)) badarg = TRUE;
2658 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2659 not to be documented for sendmail but mailx (at least) uses it) */
2662 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2666 /* -L: set the identifier used for syslog; equivalent to setting
2667 syslog_processname in the config file, but needs to be an admin option. */
2671 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2672 if ((sz = Ustrlen(argrest)) > 32)
2673 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2675 exim_fail("exim: the -L syslog name is too short\n");
2676 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2680 receiving_message = FALSE;
2682 /* -MC: continue delivery of another message via an existing open
2683 file descriptor. This option is used for an internal call by the
2684 smtp transport when there is a pending message waiting to go to an
2685 address to which it has got a connection. Five subsequent arguments are
2686 required: transport name, host name, IP address, sequence number, and
2687 message_id. Transports may decline to create new processes if the sequence
2688 number gets too big. The channel is stdin. This (-MC) must be the last
2689 argument. There's a subsequent check that the real-uid is privileged.
2691 If we are running in the test harness. delay for a bit, to let the process
2692 that set this one up complete. This makes for repeatability of the logging,
2695 if (Ustrcmp(argrest, "C") == 0)
2697 union sockaddr_46 interface_sock;
2698 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2701 exim_fail("exim: too many or too few arguments after -MC\n");
2703 if (msg_action_arg >= 0)
2704 exim_fail("exim: incompatible arguments\n");
2706 continue_transport = string_copy_taint(argv[++i], TRUE);
2707 continue_hostname = string_copy_taint(argv[++i], TRUE);
2708 continue_host_address = string_copy_taint(argv[++i], TRUE);
2709 continue_sequence = Uatoi(argv[++i]);
2710 msg_action = MSG_DELIVER;
2711 msg_action_arg = ++i;
2712 forced_delivery = TRUE;
2713 queue_run_pid = passed_qr_pid;
2714 queue_run_pipe = passed_qr_pipe;
2716 if (!mac_ismsgid(argv[i]))
2717 exim_fail("exim: malformed message id %s after -MC option\n",
2720 /* Set up $sending_ip_address and $sending_port, unless proxied */
2722 if (!continue_proxy_cipher)
2723 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2725 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2728 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2731 testharness_pause_ms(500);
2735 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2739 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2740 precedes -MC (see above). The flag indicates that the host to which
2741 Exim is connected has accepted an AUTH sequence. */
2743 case 'A': f.smtp_authenticated = TRUE; break;
2745 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2746 that exim is connected to supports the esmtp extension DSN */
2748 case 'D': smtp_peer_options |= OPTION_DSN; break;
2750 /* -MCG: set the queue name, to a non-default value */
2752 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2756 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2758 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2760 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2761 it preceded -MC (see above) */
2763 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2765 /* -MCQ: pass on the pid of the queue-running process that started
2766 this chain of deliveries and the fd of its synchronizing pipe; this
2767 is useful only when it precedes -MC (see above) */
2769 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2771 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2775 /* -MCS: set the smtp_use_size flag; this is useful only when it
2776 precedes -MC (see above) */
2778 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2781 /* -MCt: similar to -MCT below but the connection is still open
2782 via a proxy process which handles the TLS context and coding.
2783 Require three arguments for the proxied local address and port,
2784 and the TLS cipher. */
2786 case 't': if (++i < argc)
2787 sending_ip_address = string_copy_taint(argv[i], TRUE);
2790 sending_port = (int)(Uatol(argv[i]));
2793 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2797 /* -MCT: set the tls_offered flag; this is useful only when it
2798 precedes -MC (see above). The flag indicates that the host to which
2799 Exim is connected has offered TLS support. */
2801 case 'T': smtp_peer_options |= OPTION_TLS; break;
2804 default: badarg = TRUE; break;
2809 /* -M[x]: various operations on the following list of message ids:
2810 -M deliver the messages, ignoring next retry times and thawing
2811 -Mc deliver the messages, checking next retry times, no thawing
2812 -Mf freeze the messages
2813 -Mg give up on the messages
2814 -Mt thaw the messages
2815 -Mrm remove the messages
2816 In the above cases, this must be the last option. There are also the
2817 following options which are followed by a single message id, and which
2818 act on that message. Some of them use the "recipient" addresses as well.
2819 -Mar add recipient(s)
2820 -Mmad mark all recipients delivered
2821 -Mmd mark recipients(s) delivered
2823 -Mset load a message for use with -be
2825 -Mvc show copy (of whole message, in RFC 2822 format)
2832 msg_action = MSG_DELIVER;
2833 forced_delivery = f.deliver_force_thaw = TRUE;
2835 else if (Ustrcmp(argrest, "ar") == 0)
2837 msg_action = MSG_ADD_RECIPIENT;
2838 one_msg_action = TRUE;
2840 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2841 else if (Ustrcmp(argrest, "es") == 0)
2843 msg_action = MSG_EDIT_SENDER;
2844 one_msg_action = TRUE;
2846 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2847 else if (Ustrcmp(argrest, "g") == 0)
2849 msg_action = MSG_DELIVER;
2850 deliver_give_up = TRUE;
2852 else if (Ustrcmp(argrest, "G") == 0)
2854 msg_action = MSG_SETQUEUE;
2855 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2857 else if (Ustrcmp(argrest, "mad") == 0)
2859 msg_action = MSG_MARK_ALL_DELIVERED;
2861 else if (Ustrcmp(argrest, "md") == 0)
2863 msg_action = MSG_MARK_DELIVERED;
2864 one_msg_action = TRUE;
2866 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2867 else if (Ustrcmp(argrest, "set") == 0)
2869 msg_action = MSG_LOAD;
2870 one_msg_action = TRUE;
2872 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2873 else if (Ustrcmp(argrest, "vb") == 0)
2875 msg_action = MSG_SHOW_BODY;
2876 one_msg_action = TRUE;
2878 else if (Ustrcmp(argrest, "vc") == 0)
2880 msg_action = MSG_SHOW_COPY;
2881 one_msg_action = TRUE;
2883 else if (Ustrcmp(argrest, "vh") == 0)
2885 msg_action = MSG_SHOW_HEADER;
2886 one_msg_action = TRUE;
2888 else if (Ustrcmp(argrest, "vl") == 0)
2890 msg_action = MSG_SHOW_LOG;
2891 one_msg_action = TRUE;
2893 else { badarg = TRUE; break; }
2895 /* All the -Mxx options require at least one message id. */
2897 msg_action_arg = i + 1;
2898 if (msg_action_arg >= argc)
2899 exim_fail("exim: no message ids given after %s option\n", arg);
2901 /* Some require only message ids to follow */
2903 if (!one_msg_action)
2905 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2906 exim_fail("exim: malformed message id %s after %s option\n",
2908 goto END_ARG; /* Remaining args are ids */
2911 /* Others require only one message id, possibly followed by addresses,
2912 which will be handled as normal arguments. */
2916 if (!mac_ismsgid(argv[msg_action_arg]))
2917 exim_fail("exim: malformed message id %s after %s option\n",
2918 argv[msg_action_arg], arg);
2924 /* Some programs seem to call the -om option without the leading o;
2925 for sendmail it askes for "me too". Exim always does this. */
2928 if (*argrest) badarg = TRUE;
2932 /* -N: don't do delivery - a debugging option that stops transports doing
2933 their thing. It implies debugging at the D_v level. */
2938 f.dont_deliver = TRUE;
2939 debug_selector |= D_v;
2940 debug_file = stderr;
2946 /* -n: This means "don't alias" in sendmail, apparently.
2947 For normal invocations, it has no effect.
2948 It may affect some other options. */
2954 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2955 option to the specified value. This form uses long names. We need to handle
2956 -O option=value and -Ooption=value. */
2961 exim_fail("exim: string expected after -O\n");
2967 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2970 if (!*(alias_arg = argrest))
2971 if (i+1 < argc) alias_arg = argv[++i];
2972 else exim_fail("exim: string expected after -oA\n");
2975 /* -oB: Set a connection message max value for remote deliveries */
2978 uschar * p = argrest;
2980 if (i+1 < argc && isdigit((argv[i+1][0])))
2984 connection_max_messages = 1;
2991 exim_fail("exim: number expected after -oB\n");
2992 connection_max_messages = Uatoi(p);
2997 /* -odb: background delivery */
3000 if (Ustrcmp(argrest, "b") == 0)
3002 f.synchronous_delivery = FALSE;
3003 arg_queue_only = FALSE;
3004 queue_only_set = TRUE;
3007 /* -odd: testsuite-only: add no inter-process delays */
3009 else if (Ustrcmp(argrest, "d") == 0)
3010 f.testsuite_delays = FALSE;
3012 /* -odf: foreground delivery (smail-compatible option); same effect as
3013 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3016 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3018 f.synchronous_delivery = TRUE;
3019 arg_queue_only = FALSE;
3020 queue_only_set = TRUE;
3023 /* -odq: queue only */
3025 else if (Ustrcmp(argrest, "q") == 0)
3027 f.synchronous_delivery = FALSE;
3028 arg_queue_only = TRUE;
3029 queue_only_set = TRUE;
3032 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3033 but no remote delivery */
3035 else if (Ustrcmp(argrest, "qs") == 0)
3037 f.queue_smtp = TRUE;
3038 arg_queue_only = FALSE;
3039 queue_only_set = TRUE;
3044 /* -oex: Sendmail error flags. As these are also accepted without the
3045 leading -o prefix, for compatibility with vacation and other callers,
3046 they are handled with -e above. */
3048 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3049 -oitrue: Another sendmail syntax for the same */
3052 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3057 /* -oM*: Set various characteristics for an incoming message; actually
3058 acted on for trusted callers only. */
3063 exim_fail("exim: data expected after -oM%s\n", argrest);
3065 /* -oMa: Set sender host address */
3067 if (Ustrcmp(argrest, "a") == 0)
3068 sender_host_address = string_copy_taint(argv[++i], TRUE);
3070 /* -oMaa: Set authenticator name */
3072 else if (Ustrcmp(argrest, "aa") == 0)
3073 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3075 /* -oMas: setting authenticated sender */
3077 else if (Ustrcmp(argrest, "as") == 0)
3078 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3080 /* -oMai: setting authenticated id */
3082 else if (Ustrcmp(argrest, "ai") == 0)
3083 authenticated_id = string_copy_taint(argv[++i], TRUE);
3085 /* -oMi: Set incoming interface address */
3087 else if (Ustrcmp(argrest, "i") == 0)
3088 interface_address = string_copy_taint(argv[++i], TRUE);
3090 /* -oMm: Message reference */
3092 else if (Ustrcmp(argrest, "m") == 0)
3094 if (!mac_ismsgid(argv[i+1]))
3095 exim_fail("-oMm must be a valid message ID\n");
3096 if (!f.trusted_config)
3097 exim_fail("-oMm must be called by a trusted user/config\n");
3098 message_reference = argv[++i];
3101 /* -oMr: Received protocol */
3103 else if (Ustrcmp(argrest, "r") == 0)
3105 if (received_protocol)
3106 exim_fail("received_protocol is set already\n");
3108 received_protocol = string_copy_taint(argv[++i], TRUE);
3110 /* -oMs: Set sender host name */
3112 else if (Ustrcmp(argrest, "s") == 0)
3113 sender_host_name = string_copy_taint(argv[++i], TRUE);
3115 /* -oMt: Set sender ident */
3117 else if (Ustrcmp(argrest, "t") == 0)
3119 sender_ident_set = TRUE;
3120 sender_ident = string_copy_taint(argv[++i], TRUE);
3123 /* Else a bad argument */
3130 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3131 seem to call this as -m (undocumented), so that is also accepted (see
3133 /* -oo: An ancient flag for old-style addresses which still seems to
3134 crop up in some calls (see in SCO). */
3138 if (*argrest) badarg = TRUE;
3141 /* -oP <name>: set pid file path for daemon
3142 -oPX: delete pid file of daemon */
3145 if (!*argrest) override_pid_file_path = argv[++i];
3146 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3151 /* -or <n>: set timeout for non-SMTP acceptance
3152 -os <n>: set timeout for SMTP acceptance */
3157 int * tp = argrest[-1] == 'r'
3158 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3160 *tp = readconf_readtime(argrest, 0, FALSE);
3161 else if (i+1 < argc)
3162 *tp = readconf_readtime(argv[++i], 0, FALSE);
3165 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3169 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3172 if (*argrest) badarg = TRUE;
3173 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3176 /* Unknown -o argument */
3184 /* -ps: force Perl startup; -pd force delayed Perl startup */
3188 if (*argrest == 's' && argrest[1] == 0)
3190 perl_start_option = 1;
3193 if (*argrest == 'd' && argrest[1] == 0)
3195 perl_start_option = -1;
3200 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3201 which sets the host protocol and host name */
3204 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3210 if (received_protocol)
3211 exim_fail("received_protocol is set already\n");
3213 hn = Ustrchr(argrest, ':');
3215 received_protocol = string_copy_taint(argrest, TRUE);
3218 int old_pool = store_pool;
3219 store_pool = POOL_PERM;
3220 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3221 store_pool = old_pool;
3222 sender_host_name = string_copy_taint(hn + 1, TRUE);
3229 receiving_message = FALSE;
3230 if (queue_interval >= 0)
3231 exim_fail("exim: -q specified more than once\n");
3233 /* -qq...: Do queue runs in a 2-stage manner */
3235 if (*argrest == 'q')
3237 f.queue_2stage = TRUE;
3241 /* -qi...: Do only first (initial) deliveries */
3243 if (*argrest == 'i')
3245 f.queue_run_first_delivery = TRUE;
3249 /* -qf...: Run the queue, forcing deliveries
3250 -qff..: Ditto, forcing thawing as well */
3252 if (*argrest == 'f')
3254 f.queue_run_force = TRUE;
3255 if (*++argrest == 'f')
3257 f.deliver_force_thaw = TRUE;
3262 /* -q[f][f]l...: Run the queue only on local deliveries */
3264 if (*argrest == 'l')
3266 f.queue_run_local = TRUE;
3270 /* -q[f][f][l][G<name>]... Work on the named queue */
3272 if (*argrest == 'G')
3275 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3276 queue_name = string_copyn(argrest, i);
3278 if (*argrest == '/') argrest++;
3281 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3282 only, optionally named, optionally starting from a given message id. */
3284 if (!(list_queue || count_queue))
3286 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3289 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3290 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3291 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3292 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3295 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3296 forced, optionally local only, optionally named. */
3298 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3300 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3304 case 'R': /* Synonymous with -qR... */
3305 receiving_message = FALSE;
3307 /* -Rf: As -R (below) but force all deliveries,
3308 -Rff: Ditto, but also thaw all frozen messages,
3309 -Rr: String is regex
3310 -Rrf: Regex and force
3311 -Rrff: Regex and force and thaw
3313 in all cases provided there are no further characters in this
3317 for (int i = 0; i < nelem(rsopts); i++)
3318 if (Ustrcmp(argrest, rsopts[i]) == 0)
3320 if (i != 2) f.queue_run_force = TRUE;
3321 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3322 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3323 argrest += Ustrlen(rsopts[i]);
3326 /* -R: Set string to match in addresses for forced queue run to
3327 pick out particular messages. */
3330 deliver_selectstring = string_copy_taint(argrest, TRUE);
3331 else if (i+1 < argc)
3332 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3334 exim_fail("exim: string expected after -R\n");
3338 /* -r: an obsolete synonym for -f (see above) */
3341 /* -S: Like -R but works on sender. */
3343 case 'S': /* Synonymous with -qS... */
3344 receiving_message = FALSE;
3346 /* -Sf: As -S (below) but force all deliveries,
3347 -Sff: Ditto, but also thaw all frozen messages,
3348 -Sr: String is regex
3349 -Srf: Regex and force
3350 -Srff: Regex and force and thaw
3352 in all cases provided there are no further characters in this
3356 for (int i = 0; i < nelem(rsopts); i++)
3357 if (Ustrcmp(argrest, rsopts[i]) == 0)
3359 if (i != 2) f.queue_run_force = TRUE;
3360 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3361 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3362 argrest += Ustrlen(rsopts[i]);
3365 /* -S: Set string to match in addresses for forced queue run to
3366 pick out particular messages. */
3369 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3370 else if (i+1 < argc)
3371 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3373 exim_fail("exim: string expected after -S\n");
3376 /* -Tqt is an option that is exclusively for use by the testing suite.
3377 It is not recognized in other circumstances. It allows for the setting up
3378 of explicit "queue times" so that various warning/retry things can be
3379 tested. Otherwise variability of clock ticks etc. cause problems. */
3382 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3383 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3388 /* -t: Set flag to extract recipients from body of message. */
3391 if (!*argrest) extract_recipients = TRUE;
3393 /* -ti: Set flag to extract recipients from body of message, and also
3394 specify that dot does not end the message. */
3396 else if (Ustrcmp(argrest, "i") == 0)
3398 extract_recipients = TRUE;
3402 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3405 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3412 /* -U: This means "initial user submission" in sendmail, apparently. The
3413 doc claims that in future sendmail may refuse syntactically invalid
3414 messages instead of fixing them. For the moment, we just ignore it. */
3420 /* -v: verify things - this is a very low-level debugging */
3425 debug_selector |= D_v;
3426 debug_file = stderr;
3432 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3434 The -x flag tells the sendmail command that mail from a local
3435 mail program has National Language Support (NLS) extended characters
3436 in the body of the mail item. The sendmail command can send mail with
3437 extended NLS characters across networks that normally corrupts these
3440 As Exim is 8-bit clean, it just ignores this flag. */
3443 if (*argrest) badarg = TRUE;
3446 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3447 logs to that file. We swallow the parameter and otherwise ignore it. */
3452 exim_fail("exim: string expected after -X\n");
3458 log_oneline = string_copy_taint(argv[i], TRUE);
3460 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3463 /* All other initial characters are errors */
3468 } /* End of high-level switch statement */
3470 /* Failed to recognize the option, or syntax error */
3473 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3474 "option %s\n", arg);
3478 /* If -R or -S have been specified without -q, assume a single queue run. */
3480 if ( (deliver_selectstring || deliver_selectstring_sender)
3481 && queue_interval < 0)
3486 /* If usage_wanted is set we call the usage function - which never returns */
3487 if (usage_wanted) exim_usage(called_as);
3489 /* Arguments have been processed. Check for incompatibilities. */
3491 (smtp_input || extract_recipients || recipients_arg < argc) &&
3492 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3493 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3494 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3497 msg_action_arg > 0 &&
3498 (f.daemon_listen || queue_interval > 0 || list_options ||
3499 (checking && msg_action != MSG_LOAD) ||
3500 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3503 (f.daemon_listen || queue_interval > 0) &&
3504 (sender_address != NULL || list_options || list_queue || checking ||
3508 f.daemon_listen && queue_interval == 0
3511 f.inetd_wait_mode && queue_interval >= 0
3515 (checking || smtp_input || extract_recipients ||
3516 filter_test != FTEST_NONE || bi_option)
3519 verify_address_mode &&
3520 (f.address_test_mode || smtp_input || extract_recipients ||
3521 filter_test != FTEST_NONE || bi_option)
3524 f.address_test_mode && (smtp_input || extract_recipients ||
3525 filter_test != FTEST_NONE || bi_option)
3528 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3532 deliver_selectstring != NULL && queue_interval < 0
3535 msg_action == MSG_LOAD &&
3536 (!expansion_test || expansion_test_message != NULL)
3539 exim_fail("exim: incompatible command-line options or arguments\n");
3541 /* If debugging is set up, set the file and the file descriptor to pass on to
3542 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3543 to run in the foreground. */
3545 if (debug_selector != 0)
3547 debug_file = stderr;
3548 debug_fd = fileno(debug_file);
3549 f.background_daemon = FALSE;
3550 testharness_pause_ms(100); /* lets caller finish */
3551 if (debug_selector != D_v) /* -v only doesn't show this */
3553 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3554 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3556 if (!version_printed)
3557 show_whats_supported(stderr);
3561 /* When started with root privilege, ensure that the limits on the number of
3562 open files and the number of processes (where that is accessible) are
3563 sufficiently large, or are unset, in case Exim has been called from an
3564 environment where the limits are screwed down. Not all OS have the ability to
3565 change some of these limits. */
3569 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3575 #ifdef RLIMIT_NOFILE
3576 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3578 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3580 rlp.rlim_cur = rlp.rlim_max = 0;
3583 /* I originally chose 1000 as a nice big number that was unlikely to
3584 be exceeded. It turns out that some older OS have a fixed upper limit of
3587 if (rlp.rlim_cur < 1000)
3589 rlp.rlim_cur = rlp.rlim_max = 1000;
3590 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3592 rlp.rlim_cur = rlp.rlim_max = 256;
3593 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3594 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3601 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3603 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3605 rlp.rlim_cur = rlp.rlim_max = 0;
3608 #ifdef RLIM_INFINITY
3609 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3611 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3613 if (rlp.rlim_cur < 1000)
3615 rlp.rlim_cur = rlp.rlim_max = 1000;
3617 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3618 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3624 /* Exim is normally entered as root (but some special configurations are
3625 possible that don't do this). However, it always spins off sub-processes that
3626 set their uid and gid as required for local delivery. We don't want to pass on
3627 any extra groups that root may belong to, so we want to get rid of them all at
3630 We need to obey setgroups() at this stage, before possibly giving up root
3631 privilege for a changed configuration file, but later on we might need to
3632 check on the additional groups for the admin user privilege - can't do that
3633 till after reading the config, which might specify the exim gid. Therefore,
3634 save the group list here first. */
3636 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3637 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3639 /* There is a fundamental difference in some BSD systems in the matter of
3640 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3641 known not to be different. On the "different" systems there is a single group
3642 list, and the first entry in it is the current group. On all other versions of
3643 Unix there is a supplementary group list, which is in *addition* to the current
3644 group. Consequently, to get rid of all extraneous groups on a "standard" system
3645 you pass over 0 groups to setgroups(), while on a "different" system you pass
3646 over a single group - the current group, which is always the first group in the
3647 list. Calling setgroups() with zero groups on a "different" system results in
3648 an error return. The following code should cope with both types of system.
3650 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3651 the "setgroups() with zero groups" - and changes the egid.
3652 Thanks to that we had to stash the original_egid above, for use below
3653 in the call to exim_setugid().
3655 However, if this process isn't running as root, setgroups() can't be used
3656 since you have to be root to run it, even if throwing away groups.
3657 Except, sigh, for Hurd - where you can.
3658 Not being root here happens only in some unusual configurations. */
3661 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3662 && setgroups(0, NULL) != 0
3664 && setgroups(1, group_list) != 0)
3665 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3667 /* If the configuration file name has been altered by an argument on the
3668 command line (either a new file name or a macro definition) and the caller is
3669 not root, or if this is a filter testing run, remove any setuid privilege the
3670 program has and run as the underlying user.
3672 The exim user is locked out of this, which severely restricts the use of -C
3675 Otherwise, set the real ids to the effective values (should be root unless run
3676 from inetd, which it can either be root or the exim uid, if one is configured).
3678 There is a private mechanism for bypassing some of this, in order to make it
3679 possible to test lots of configurations automatically, without having either to
3680 recompile each time, or to patch in an actual configuration file name and other
3681 values (such as the path name). If running in the test harness, pretend that
3682 configuration file changes and macro definitions haven't happened. */
3685 (!f.trusted_config || /* Config changed, or */
3686 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3687 real_uid != root_uid && /* Not root, and */
3688 !f.running_in_test_harness /* Not fudged */
3690 expansion_test /* expansion testing */
3692 filter_test != FTEST_NONE) /* Filter testing */
3694 setgroups(group_count, group_list);
3695 exim_setugid(real_uid, real_gid, FALSE,
3696 US"-C, -D, -be or -bf forces real uid");
3697 removed_privilege = TRUE;
3699 /* In the normal case when Exim is called like this, stderr is available
3700 and should be used for any logging information because attempts to write
3701 to the log will usually fail. To arrange this, we unset really_exim. However,
3702 if no stderr is available there is no point - we might as well have a go
3703 at the log (if it fails, syslog will be written).
3705 Note that if the invoker is Exim, the logs remain available. Messing with
3706 this causes unlogged successful deliveries. */
3708 if (log_stderr && real_uid != exim_uid)
3709 f.really_exim = FALSE;
3712 /* Privilege is to be retained for the moment. It may be dropped later,
3713 depending on the job that this Exim process has been asked to do. For now, set
3714 the real uid to the effective so that subsequent re-execs of Exim are done by a
3718 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3720 /* If testing a filter, open the file(s) now, before wasting time doing other
3721 setups and reading the message. */
3723 if (filter_test & FTEST_SYSTEM)
3724 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3725 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3728 if (filter_test & FTEST_USER)
3729 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3730 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3733 /* Initialise lookup_list
3734 If debugging, already called above via version reporting.
3735 In either case, we initialise the list of available lookups while running
3736 as root. All dynamically modules are loaded from a directory which is
3737 hard-coded into the binary and is code which, if not a module, would be
3738 part of Exim already. Ability to modify the content of the directory
3739 is equivalent to the ability to modify a setuid binary!
3741 This needs to happen before we read the main configuration. */
3745 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3748 /* Read the main runtime configuration data; this gives up if there
3749 is a failure. It leaves the configuration file open so that the subsequent
3750 configuration data for delivery can be read if needed.
3752 NOTE: immediately after opening the configuration file we change the working
3753 directory to "/"! Later we change to $spool_directory. We do it there, because
3754 during readconf_main() some expansion takes place already. */
3756 /* Store the initial cwd before we change directories. Can be NULL if the
3757 dir has already been unlinked. */
3758 initial_cwd = os_getcwd(NULL, 0);
3761 -be[m] expansion test -
3762 -b[fF] filter test new
3764 -bmalware malware_test_file new
3766 -brw rewrite test new
3768 -bv[s] address verify -
3770 -bP <option> (except -bP config, which sets list_config)
3772 If any of these options is set, we suppress warnings about configuration
3773 issues (currently about tls_advertise_hosts and keep_environment not being
3777 #ifdef MEASURE_TIMING
3778 struct timeval t0, diff;
3779 (void)gettimeofday(&t0, NULL);
3782 readconf_main(checking || list_options);
3784 #ifdef MEASURE_TIMING
3785 report_time_since(&t0, US"readconf_main (delta)");
3790 /* Now in directory "/" */
3792 if (cleanup_environment() == FALSE)
3793 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3796 /* If an action on specific messages is requested, or if a daemon or queue
3797 runner is being started, we need to know if Exim was called by an admin user.
3798 This is the case if the real user is root or exim, or if the real group is
3799 exim, or if one of the supplementary groups is exim or a group listed in
3800 admin_groups. We don't fail all message actions immediately if not admin_user,
3801 since some actions can be performed by non-admin users. Instead, set admin_user
3802 for later interrogation. */
3804 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3805 f.admin_user = TRUE;
3807 for (int i = 0; i < group_count && !f.admin_user; i++)
3808 if (group_list[i] == exim_gid)
3809 f.admin_user = TRUE;
3810 else if (admin_groups)
3811 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3812 if (admin_groups[j] == group_list[i])
3813 f.admin_user = TRUE;
3815 /* Another group of privileged users are the trusted users. These are root,
3816 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3817 are permitted to specify sender_addresses with -f on the command line, and
3818 other message parameters as well. */
3820 if (real_uid == root_uid || real_uid == exim_uid)
3821 f.trusted_caller = TRUE;
3825 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3826 if (trusted_users[i] == real_uid)
3827 f.trusted_caller = TRUE;
3830 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3831 if (trusted_groups[i] == real_gid)
3832 f.trusted_caller = TRUE;
3833 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3834 if (trusted_groups[i] == group_list[j])
3835 f.trusted_caller = TRUE;
3838 /* At this point, we know if the user is privileged and some command-line
3839 options become possibly impermissible, depending upon the configuration file. */
3841 if (checking && commandline_checks_require_admin && !f.admin_user)
3842 exim_fail("exim: those command-line flags are set to require admin\n");
3844 /* Handle the decoding of logging options. */
3846 decode_bits(log_selector, log_selector_size, log_notall,
3847 log_selector_string, log_options, log_options_count, US"log", 0);
3851 debug_printf("configuration file is %s\n", config_main_filename);
3852 debug_printf("log selectors =");
3853 for (int i = 0; i < log_selector_size; i++)
3854 debug_printf(" %08x", log_selector[i]);
3858 /* If domain literals are not allowed, check the sender address that was
3859 supplied with -f. Ditto for a stripped trailing dot. */
3863 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3864 exim_fail("exim: bad -f address \"%s\": domain literals not "
3865 "allowed\n", sender_address);
3866 if (f_end_dot && !strip_trailing_dot)
3867 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3868 "(trailing dot not allowed)\n", sender_address);
3871 /* See if an admin user overrode our logging. */
3873 if (cmdline_syslog_name)
3876 syslog_processname = cmdline_syslog_name;
3877 log_file_path = string_copy(CUS"syslog");
3880 /* not a panic, non-privileged users should not be able to spam paniclog */
3882 "exim: you lack sufficient privilege to specify syslog process name\n");
3884 /* Paranoia check of maximum lengths of certain strings. There is a check
3885 on the length of the log file path in log.c, which will come into effect
3886 if there are any calls to write the log earlier than this. However, if we
3887 get this far but the string is very long, it is better to stop now than to
3888 carry on and (e.g.) receive a message and then have to collapse. The call to
3889 log_write() from here will cause the ultimate panic collapse if the complete
3890 file name exceeds the buffer length. */
3892 if (Ustrlen(log_file_path) > 200)
3893 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3894 "log_file_path is longer than 200 chars: aborting");
3896 if (Ustrlen(pid_file_path) > 200)
3897 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3898 "pid_file_path is longer than 200 chars: aborting");
3900 if (Ustrlen(spool_directory) > 200)
3901 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3902 "spool_directory is longer than 200 chars: aborting");
3904 /* Length check on the process name given to syslog for its TAG field,
3905 which is only permitted to be 32 characters or less. See RFC 3164. */
3907 if (Ustrlen(syslog_processname) > 32)
3908 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3909 "syslog_processname is longer than 32 chars: aborting");
3914 log_write(0, LOG_MAIN, "%s", log_oneline);
3915 return EXIT_SUCCESS;
3918 return EXIT_FAILURE;
3920 /* In some operating systems, the environment variable TMPDIR controls where
3921 temporary files are created; Exim doesn't use these (apart from when delivering
3922 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3923 If TMPDIR is found in the environment, reset it to the value defined in the
3924 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3925 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3926 EXIM_TMPDIR by the build scripts.
3930 if (environ) for (uschar ** p = USS environ; *p; p++)
3931 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3933 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3934 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3936 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3940 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3941 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3942 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3943 called by a user who has set the TZ variable. This then affects the timestamps
3944 in log files and in Received: headers, and any created Date: header lines. The
3945 required timezone is settable in the configuration file, so nothing can be done
3946 about this earlier - but hopefully nothing will normally be logged earlier than
3947 this. We have to make a new environment if TZ is wrong, but don't bother if
3948 timestamps_utc is set, because then all times are in UTC anyway. */
3950 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3951 f.timestamps_utc = TRUE;
3954 uschar *envtz = US getenv("TZ");
3956 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3957 : timezone_string != NULL
3960 uschar **p = USS environ;
3964 if (environ) while (*p++) count++;
3965 if (!envtz) count++;
3966 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3967 if (environ) for (p = USS environ; *p; p++)
3968 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3969 if (timezone_string)
3971 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3972 sprintf(CS *newp++, "TZ=%s", timezone_string);
3977 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3978 tod_stamp(tod_log));
3982 /* Handle the case when we have removed the setuid privilege because of -C or
3983 -D. This means that the caller of Exim was not root.
3985 There is a problem if we were running as the Exim user. The sysadmin may
3986 expect this case to retain privilege because "the binary was called by the
3987 Exim user", but it hasn't, because either the -D option set macros, or the
3988 -C option set a non-trusted configuration file. There are two possibilities:
3990 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3991 to do message deliveries. Thus, the fact that it is running as a
3992 non-privileged user is plausible, and might be wanted in some special
3993 configurations. However, really_exim will have been set false when
3994 privilege was dropped, to stop Exim trying to write to its normal log
3995 files. Therefore, re-enable normal log processing, assuming the sysadmin
3996 has set up the log directory correctly.
3998 (2) If deliver_drop_privilege is not set, the configuration won't work as
3999 apparently intended, and so we log a panic message. In order to retain
4000 root for -C or -D, the caller must either be root or be invoking a
4001 trusted configuration file (when deliver_drop_privilege is false). */
4003 if ( removed_privilege
4004 && (!f.trusted_config || opt_D_used)
4005 && real_uid == exim_uid)
4006 if (deliver_drop_privilege)
4007 f.really_exim = TRUE; /* let logging work normally */
4009 log_write(0, LOG_MAIN|LOG_PANIC,
4010 "exim user lost privilege for using %s option",
4011 f.trusted_config? "-D" : "-C");
4013 /* Start up Perl interpreter if Perl support is configured and there is a
4014 perl_startup option, and the configuration or the command line specifies
4015 initializing starting. Note that the global variables are actually called
4016 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4019 if (perl_start_option != 0)
4020 opt_perl_at_start = (perl_start_option > 0);
4021 if (opt_perl_at_start && opt_perl_startup != NULL)
4024 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4025 if ((errstr = init_perl(opt_perl_startup)))
4026 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4027 opt_perl_started = TRUE;
4029 #endif /* EXIM_PERL */
4031 /* Log the arguments of the call if the configuration file said so. This is
4032 a debugging feature for finding out what arguments certain MUAs actually use.
4033 Don't attempt it if logging is disabled, or if listing variables or if
4034 verifying/testing addresses or expansions. */
4036 if ( (debug_selector & D_any || LOGGING(arguments))
4037 && f.really_exim && !list_options && !checking)
4039 uschar *p = big_buffer;
4040 Ustrcpy(p, US"cwd= (failed)");
4046 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4047 p += 4 + Ustrlen(initial_cwd);
4048 /* in case p is near the end and we don't provide enough space for
4049 * string_format to be willing to write. */
4053 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4055 for (int i = 0; i < argc; i++)
4057 int len = Ustrlen(argv[i]);
4058 const uschar *printing;
4060 if (p + len + 8 >= big_buffer + big_buffer_size)
4062 Ustrcpy(p, US" ...");
4063 log_write(0, LOG_MAIN, "%s", big_buffer);
4064 Ustrcpy(big_buffer, US"...");
4067 printing = string_printing(argv[i]);
4068 if (!*printing) quote = US"\"";
4071 const uschar *pp = printing;
4073 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4075 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4076 (p - big_buffer) - 4), printing, quote);
4079 if (LOGGING(arguments))
4080 log_write(0, LOG_MAIN, "%s", big_buffer);
4082 debug_printf("%s\n", big_buffer);
4085 /* Set the working directory to be the top-level spool directory. We don't rely
4086 on this in the code, which always uses fully qualified names, but it's useful
4087 for core dumps etc. Don't complain if it fails - the spool directory might not
4088 be generally accessible and calls with the -C option (and others) have lost
4089 privilege by now. Before the chdir, we try to ensure that the directory exists.
4092 if (Uchdir(spool_directory) != 0)
4095 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4096 dummy = /* quieten compiler */ Uchdir(spool_directory);
4097 dummy = dummy; /* yet more compiler quietening, sigh */
4100 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4101 alias file. Exim doesn't have such a concept, but this call is screwed into
4102 Sun's YP makefiles. Handle this by calling a configured script, as the real
4103 user who called Exim. The -oA option can be used to pass an argument to the
4108 (void)fclose(config_file);
4113 argv[i++] = bi_command;
4114 if (alias_arg) argv[i++] = alias_arg;
4117 setgroups(group_count, group_list);
4118 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4120 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4121 argv[1] ? argv[1] : US"");
4123 execv(CS argv[0], (char *const *)argv);
4124 exim_fail("exim: exec failed: %s\n", strerror(errno));
4128 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4133 /* We moved the admin/trusted check to be immediately after reading the
4134 configuration file. We leave these prints here to ensure that syslog setup,
4135 logfile setup, and so on has already happened. */
4137 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4138 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4140 /* Only an admin user may start the daemon or force a queue run in the default
4141 configuration, but the queue run restriction can be relaxed. Only an admin
4142 user may request that a message be returned to its sender forthwith. Only an
4143 admin user may specify a debug level greater than D_v (because it might show
4144 passwords, etc. in lookup queries). Only an admin user may request a queue
4145 count. Only an admin user can use the test interface to scan for email
4146 (because Exim will be in the spool dir and able to look at mails). */
4150 BOOL debugset = (debug_selector & ~D_v) != 0;
4151 if ( deliver_give_up || f.daemon_listen || malware_test_file
4152 || count_queue && queue_list_requires_admin
4153 || list_queue && queue_list_requires_admin
4154 || queue_interval >= 0 && prod_requires_admin
4155 || queue_name_dest && prod_requires_admin
4156 || debugset && !f.running_in_test_harness
4158 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4161 /* If the real user is not root or the exim uid, the argument for passing
4162 in an open TCP/IP connection for another message is not permitted, nor is
4163 running with the -N option for any delivery action, unless this call to exim is
4164 one that supplied an input message, or we are using a patched exim for
4165 regression testing. */
4167 if (real_uid != root_uid && real_uid != exim_uid &&
4168 (continue_hostname != NULL ||
4170 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4171 )) && !f.running_in_test_harness)
4172 exim_fail("exim: Permission denied\n");
4174 /* If the caller is not trusted, certain arguments are ignored when running for
4175 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4176 Note that authority for performing certain actions on messages is tested in the
4177 queue_action() function. */
4179 if (!f.trusted_caller && !checking)
4181 sender_host_name = sender_host_address = interface_address =
4182 sender_ident = received_protocol = NULL;
4183 sender_host_port = interface_port = 0;
4184 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4187 /* If a sender host address is set, extract the optional port number off the
4188 end of it and check its syntax. Do the same thing for the interface address.
4189 Exim exits if the syntax is bad. */
4193 if (sender_host_address != NULL)
4194 sender_host_port = check_port(sender_host_address);
4195 if (interface_address != NULL)
4196 interface_port = check_port(interface_address);
4199 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4202 if (f.trusted_caller)
4204 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4205 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4208 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4211 /* If an SMTP message is being received check to see if the standard input is a
4212 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4213 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4218 union sockaddr_46 inetd_sock;
4219 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4220 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4222 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4223 if (family == AF_INET || family == AF_INET6)
4225 union sockaddr_46 interface_sock;
4226 size = sizeof(interface_sock);
4228 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4229 interface_address = host_ntoa(-1, &interface_sock, NULL,
4232 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4234 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4237 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4238 NULL, &sender_host_port);
4239 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4240 "inetd is not supported when mua_wrapper is set");
4244 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4249 /* If the load average is going to be needed while receiving a message, get it
4250 now for those OS that require the first call to os_getloadavg() to be done as
4251 root. There will be further calls later for each message received. */
4253 #ifdef LOAD_AVG_NEEDS_ROOT
4254 if ( receiving_message
4255 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4256 load_average = OS_GETLOADAVG();
4259 /* The queue_only configuration option can be overridden by -odx on the command
4260 line, except that if queue_only_override is false, queue_only cannot be unset
4261 from the command line. */
4263 if (queue_only_set && (queue_only_override || arg_queue_only))
4264 queue_only = arg_queue_only;
4266 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4269 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4270 if (arg_smtp_receive_timeout >= 0)
4271 smtp_receive_timeout = arg_smtp_receive_timeout;
4273 /* If Exim was started with root privilege, unless we have already removed the
4274 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4275 except when starting the daemon or doing some kind of delivery or address
4276 testing (-bt). These are the only cases when root need to be retained. We run
4277 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4278 retained only for starting the daemon. We always do the initgroups() in this
4279 situation (controlled by the TRUE below), in order to be as close as possible
4280 to the state Exim usually runs in. */
4282 if (!unprivileged && /* originally had root AND */
4283 !removed_privilege && /* still got root AND */
4284 !f.daemon_listen && /* not starting the daemon */
4285 queue_interval <= 0 && /* (either kind of daemon) */
4287 deliver_drop_privilege || /* requested unprivileged */
4289 queue_interval < 0 && /* not running the queue */
4290 (msg_action_arg < 0 || /* and */
4291 msg_action != MSG_DELIVER) && /* not delivering and */
4292 (!checking || !f.address_test_mode) /* not address checking */
4294 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4296 /* When we are retaining a privileged uid, we still change to the exim gid. */
4301 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4302 rv = setgid(exim_gid);
4303 /* Impact of failure is that some stuff might end up with an incorrect group.
4304 We track this for failures from root, since any attempt to change privilege
4305 by root should succeed and failures should be examined. For non-root,
4306 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4307 no need to complain then. */
4309 if (!(unprivileged || removed_privilege))
4310 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4312 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4313 (long int)exim_gid, strerror(errno));
4316 /* Handle a request to scan a file for malware */
4317 if (malware_test_file)
4319 #ifdef WITH_CONTENT_SCAN
4321 set_process_info("scanning file for malware");
4322 result = malware_in_file(malware_test_file);
4325 printf("No malware found.\n");
4330 printf("Malware lookup returned non-okay/fail: %d\n", result);
4334 printf("Malware found: %s\n", malware_name);
4336 printf("Malware scan detected malware of unknown name.\n");
4338 printf("Malware scanning not enabled at compile time.\n");
4343 /* Handle a request to list the delivery queue */
4347 set_process_info("listing the queue");
4348 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4352 /* Handle a request to count the delivery queue */
4356 set_process_info("counting the queue");
4357 fprintf(stdout, "%u\n", queue_count());
4361 /* Handle actions on specific messages, except for the force delivery and
4362 message load actions, which are done below. Some actions take a whole list of
4363 message ids, which are known to continue up to the end of the arguments. Others
4364 take a single message id and then operate on the recipients list. */
4366 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4368 int yield = EXIT_SUCCESS;
4369 set_process_info("acting on specified messages");
4371 /* ACL definitions may be needed when removing a message (-Mrm) because
4372 event_action gets expanded */
4374 if (msg_action == MSG_REMOVE)
4377 if (!one_msg_action)
4379 for (i = msg_action_arg; i < argc; i++)
4380 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4381 yield = EXIT_FAILURE;
4384 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4385 default: printf("\n"); break;
4389 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4390 recipients_arg)) yield = EXIT_FAILURE;
4394 /* We used to set up here to skip reading the ACL section, on
4395 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4396 Now, since the intro of the ${acl } expansion, ACL definitions may be
4397 needed in transports so we lost the optimisation. */
4400 #ifdef MEASURE_TIMING
4401 struct timeval t0, diff;
4402 (void)gettimeofday(&t0, NULL);
4407 #ifdef MEASURE_TIMING
4408 report_time_since(&t0, US"readconf_rest (delta)");
4412 /* Handle the -brt option. This is for checking out retry configurations.
4413 The next three arguments are a domain name or a complete address, and
4414 optionally two error numbers. All it does is to call the function that
4415 scans the retry configuration data. */
4417 if (test_retry_arg >= 0)
4419 retry_config *yield;
4420 int basic_errno = 0;
4424 if (test_retry_arg >= argc)
4426 printf("-brt needs a domain or address argument\n");
4427 exim_exit(EXIT_FAILURE, US"main");
4429 s1 = argv[test_retry_arg++];
4432 /* If the first argument contains no @ and no . it might be a local user
4433 or it might be a single-component name. Treat as a domain. */
4435 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4437 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4438 "being \ntreated as a one-component domain, not as a local part.\n\n",
4442 /* There may be an optional second domain arg. */
4444 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4445 s2 = argv[test_retry_arg++];
4447 /* The final arg is an error name */
4449 if (test_retry_arg < argc)
4451 uschar *ss = argv[test_retry_arg];
4453 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4456 printf("%s\n", CS error);
4457 return EXIT_FAILURE;
4460 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4461 code > 100 as an error is for matching codes to the decade. Turn them into
4462 a real error code, off the decade. */
4464 if (basic_errno == ERRNO_MAIL4XX ||
4465 basic_errno == ERRNO_RCPT4XX ||
4466 basic_errno == ERRNO_DATA4XX)
4468 int code = (more_errno >> 8) & 255;
4470 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4471 else if (code > 100)
4472 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4476 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4477 printf("No retry information found\n");
4480 more_errno = yield->more_errno;
4481 printf("Retry rule: %s ", yield->pattern);
4483 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4485 printf("quota%s%s ",
4486 (more_errno > 0)? "_" : "",
4487 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4489 else if (yield->basic_errno == ECONNREFUSED)
4491 printf("refused%s%s ",
4492 (more_errno > 0)? "_" : "",
4493 (more_errno == 'M')? "MX" :
4494 (more_errno == 'A')? "A" : "");
4496 else if (yield->basic_errno == ETIMEDOUT)
4499 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4501 if (more_errno != 0) printf("_%s",
4502 (more_errno == 'M')? "MX" : "A");
4505 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4506 printf("auth_failed ");
4509 for (retry_rule * r = yield->rules; r; r = r->next)
4511 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4512 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4518 printf(",%d.", x/1000);
4532 exim_exit(EXIT_SUCCESS, US"main");
4535 /* Handle a request to list one or more configuration options */
4536 /* If -n was set, we suppress some information */
4541 set_process_info("listing variables");
4542 if (recipients_arg >= argc)
4543 fail = !readconf_print(US"all", NULL, flag_n);
4544 else for (i = recipients_arg; i < argc; i++)
4547 (Ustrcmp(argv[i], "router") == 0 ||
4548 Ustrcmp(argv[i], "transport") == 0 ||
4549 Ustrcmp(argv[i], "authenticator") == 0 ||
4550 Ustrcmp(argv[i], "macro") == 0 ||
4551 Ustrcmp(argv[i], "environment") == 0))
4553 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4557 fail = !readconf_print(argv[i], NULL, flag_n);
4559 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS, US"main");
4564 set_process_info("listing config");
4565 exim_exit(readconf_print(US"config", NULL, flag_n)
4566 ? EXIT_SUCCESS : EXIT_FAILURE, US"main");
4570 /* Initialise subsystems as required. */
4574 /* Handle a request to deliver one or more messages that are already on the
4575 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4576 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4578 Delivery of specific messages is typically used for a small number when
4579 prodding by hand (when the option forced_delivery will be set) or when
4580 re-execing to regain root privilege. Each message delivery must happen in a
4581 separate process, so we fork a process for each one, and run them sequentially
4582 so that debugging output doesn't get intertwined, and to avoid spawning too
4583 many processes if a long list is given. However, don't fork for the last one;
4584 this saves a process in the common case when Exim is called to deliver just one
4587 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4589 if (prod_requires_admin && !f.admin_user)
4591 fprintf(stderr, "exim: Permission denied\n");
4592 exim_exit(EXIT_FAILURE, US"main");
4594 set_process_info("delivering specified messages");
4595 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4596 for (i = msg_action_arg; i < argc; i++)
4600 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4601 that runs into a later copy into the untainted global message_id[] */
4603 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4604 else if ((pid = fork()) == 0)
4606 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4607 exim_underbar_exit(EXIT_SUCCESS, US"cmdline-delivery");
4611 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4613 exim_exit(EXIT_FAILURE, US"main");
4617 exim_exit(EXIT_SUCCESS, US"main");
4621 /* If only a single queue run is requested, without SMTP listening, we can just
4622 turn into a queue runner, with an optional starting message id. */
4624 if (queue_interval == 0 && !f.daemon_listen)
4626 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4627 start_queue_run_id ? US" starting at " : US"",
4628 start_queue_run_id ? start_queue_run_id: US"",
4629 stop_queue_run_id ? US" stopping at " : US"",
4630 stop_queue_run_id ? stop_queue_run_id : US"");
4632 set_process_info("running the '%s' queue (single queue run)", queue_name);
4634 set_process_info("running the queue (single queue run)");
4635 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4636 exim_exit(EXIT_SUCCESS, US"main");
4640 /* Find the login name of the real user running this process. This is always
4641 needed when receiving a message, because it is written into the spool file. It
4642 may also be used to construct a from: or a sender: header, and in this case we
4643 need the user's full name as well, so save a copy of it, checked for RFC822
4644 syntax and munged if necessary, if it hasn't previously been set by the -F
4645 argument. We may try to get the passwd entry more than once, in case NIS or
4646 other delays are in evidence. Save the home directory for use in filter testing
4651 if ((pw = getpwuid(real_uid)) != NULL)
4653 originator_login = string_copy(US pw->pw_name);
4654 originator_home = string_copy(US pw->pw_dir);
4656 /* If user name has not been set by -F, set it from the passwd entry
4657 unless -f has been used to set the sender address by a trusted user. */
4659 if (!originator_name)
4661 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4663 uschar *name = US pw->pw_gecos;
4664 uschar *amp = Ustrchr(name, '&');
4667 /* Most Unix specify that a '&' character in the gecos field is
4668 replaced by a copy of the login name, and some even specify that
4669 the first character should be upper cased, so that's what we do. */
4674 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4675 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4676 buffer[loffset] = toupper(buffer[loffset]);
4680 /* If a pattern for matching the gecos field was supplied, apply
4681 it and then expand the name string. */
4683 if (gecos_pattern && gecos_name)
4686 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4688 if (regex_match_and_setup(re, name, 0, -1))
4690 uschar *new_name = expand_string(gecos_name);
4694 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4695 "gecos field \"%s\"\n", new_name, name);
4698 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4699 "\"%s\": %s\n", gecos_name, expand_string_message);
4701 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4702 "gecos field \"%s\"\n", gecos_pattern, name);
4703 store_free((void *)re);
4705 originator_name = string_copy(name);
4708 /* A trusted caller has used -f but not -F */
4710 else originator_name = US"";
4713 /* Break the retry loop */
4718 if (++i > finduser_retries) break;
4722 /* If we cannot get a user login, log the incident and give up, unless the
4723 configuration specifies something to use. When running in the test harness,
4724 any setting of unknown_login overrides the actual name. */
4726 if (originator_login == NULL || f.running_in_test_harness)
4728 if (unknown_login != NULL)
4730 originator_login = expand_string(unknown_login);
4731 if (originator_name == NULL && unknown_username != NULL)
4732 originator_name = expand_string(unknown_username);
4733 if (originator_name == NULL) originator_name = US"";
4735 if (originator_login == NULL)
4736 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4740 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4743 originator_name = string_copy(parse_fix_phrase(originator_name,
4744 Ustrlen(originator_name), big_buffer, big_buffer_size));
4746 /* If a message is created by this call of Exim, the uid/gid of its originator
4747 are those of the caller. These values are overridden if an existing message is
4748 read in from the spool. */
4750 originator_uid = real_uid;
4751 originator_gid = real_gid;
4753 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4754 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4756 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4757 returns. We leave this till here so that the originator_ fields are available
4758 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4761 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4765 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4766 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4767 "mua_wrapper is set");
4770 # ifndef DISABLE_TLS
4771 /* This also checks that the library linkage is working and we can call
4772 routines in it, so call even if tls_require_ciphers is unset */
4774 # ifdef MEASURE_TIMING
4775 struct timeval t0, diff;
4776 (void)gettimeofday(&t0, NULL);
4778 if (!tls_dropprivs_validate_require_cipher(FALSE))
4780 # ifdef MEASURE_TIMING
4781 report_time_since(&t0, US"validate_ciphers (delta)");
4789 /* If the sender ident has not been set (by a trusted caller) set it to
4790 the caller. This will get overwritten below for an inetd call. If a trusted
4791 caller has set it empty, unset it. */
4793 if (!sender_ident) sender_ident = originator_login;
4794 else if (!*sender_ident) sender_ident = NULL;
4796 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4797 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4798 originator_* variables set. */
4800 if (test_rewrite_arg >= 0)
4802 f.really_exim = FALSE;
4803 if (test_rewrite_arg >= argc)
4805 printf("-brw needs an address argument\n");
4806 exim_exit(EXIT_FAILURE, US"main");
4808 rewrite_test(argv[test_rewrite_arg]);
4809 exim_exit(EXIT_SUCCESS, US"main");
4812 /* A locally-supplied message is considered to be coming from a local user
4813 unless a trusted caller supplies a sender address with -f, or is passing in the
4814 message via SMTP (inetd invocation or otherwise). */
4816 if ( !sender_address && !smtp_input
4817 || !f.trusted_caller && filter_test == FTEST_NONE)
4819 f.sender_local = TRUE;
4821 /* A trusted caller can supply authenticated_sender and authenticated_id
4822 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4823 defaults except when host checking. */
4825 if (!authenticated_sender && !host_checking)
4826 authenticated_sender = string_sprintf("%s@%s", originator_login,
4827 qualify_domain_sender);
4828 if (!authenticated_id && !host_checking)
4829 authenticated_id = originator_login;
4832 /* Trusted callers are always permitted to specify the sender address.
4833 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4834 is specified is the empty address. However, if a trusted caller does not
4835 specify a sender address for SMTP input, we leave sender_address unset. This
4836 causes the MAIL commands to be honoured. */
4838 if ( !smtp_input && !sender_address
4839 || !receive_check_set_sender(sender_address))
4841 /* Either the caller is not permitted to set a general sender, or this is
4842 non-SMTP input and the trusted caller has not set a sender. If there is no
4843 sender, or if a sender other than <> is set, override with the originator's
4844 login (which will get qualified below), except when checking things. */
4846 if (sender_address == NULL /* No sender_address set */
4848 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4849 !checking)) /* Not running tests, including filter tests */
4851 sender_address = originator_login;
4852 f.sender_address_forced = FALSE;
4853 sender_address_domain = 0;
4857 /* Remember whether an untrusted caller set the sender address */
4859 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4861 /* Ensure that the sender address is fully qualified unless it is the empty
4862 address, which indicates an error message, or doesn't exist (root caller, smtp
4863 interface, no -f argument). */
4865 if (sender_address && *sender_address && sender_address_domain == 0)
4866 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4867 qualify_domain_sender);
4869 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4871 /* Handle a request to verify a list of addresses, or test them for delivery.
4872 This must follow the setting of the sender address, since routers can be
4873 predicated upon the sender. If no arguments are given, read addresses from
4874 stdin. Set debug_level to at least D_v to get full output for address testing.
4877 if (verify_address_mode || f.address_test_mode)
4880 int flags = vopt_qualify;
4882 if (verify_address_mode)
4884 if (!verify_as_sender) flags |= vopt_is_recipient;
4885 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4890 flags |= vopt_is_recipient;
4891 debug_selector |= D_v;
4892 debug_file = stderr;
4893 debug_fd = fileno(debug_file);
4894 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4897 if (recipients_arg < argc)
4899 while (recipients_arg < argc)
4901 /* Supplied addresses are tainted since they come from a user */
4902 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4905 BOOL finished = FALSE;
4906 uschar *ss = parse_find_address_end(s, FALSE);
4907 if (*ss == ',') *ss = 0; else finished = TRUE;
4908 test_address(s, flags, &exit_value);
4911 while (*++s == ',' || isspace(*s)) ;
4918 uschar * s = get_stdinput(NULL, NULL);
4920 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4924 exim_exit(exit_value, US"main");
4927 /* Handle expansion checking. Either expand items on the command line, or read
4928 from stdin if there aren't any. If -Mset was specified, load the message so
4929 that its variables can be used, but restrict this facility to admin users.
4930 Otherwise, if -bem was used, read a message from stdin. */
4934 dns_init(FALSE, FALSE, FALSE);
4935 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4937 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4939 exim_fail("exim: permission denied\n");
4940 message_id = argv[msg_action_arg];
4941 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4942 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4943 printf ("Failed to load message datafile %s\n", message_id);
4944 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4945 printf ("Failed to load message %s\n", message_id);
4948 /* Read a test message from a file. We fudge it up to be on stdin, saving
4949 stdin itself for later reading of expansion strings. */
4951 else if (expansion_test_message)
4953 int save_stdin = dup(0);
4954 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4956 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4959 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4960 message_ended = END_NOTENDED;
4961 read_message_body(receive_msg(extract_recipients));
4962 message_linecount += body_linecount;
4963 (void)dup2(save_stdin, 0);
4964 (void)close(save_stdin);
4965 clearerr(stdin); /* Required by Darwin */
4968 /* Only admin users may see config-file macros this way */
4970 if (!f.admin_user) macros_user = macros = mlast = NULL;
4972 /* Allow $recipients for this testing */
4974 f.enable_dollar_recipients = TRUE;
4976 /* Expand command line items */
4978 if (recipients_arg < argc)
4979 while (recipients_arg < argc)
4980 expansion_test_line(argv[recipients_arg++]);
4986 char *(*fn_readline)(const char *) = NULL;
4987 void (*fn_addhist)(const char *) = NULL;
4991 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
4994 while (s = get_stdinput(fn_readline, fn_addhist))
4995 expansion_test_line(s);
4998 if (dlhandle) dlclose(dlhandle);
5002 /* The data file will be open after -Mset */
5004 if (deliver_datafile >= 0)
5006 (void)close(deliver_datafile);
5007 deliver_datafile = -1;
5010 exim_exit(EXIT_SUCCESS, US"main: expansion test");
5014 /* The active host name is normally the primary host name, but it can be varied
5015 for hosts that want to play several parts at once. We need to ensure that it is
5016 set for host checking, and for receiving messages. */
5018 smtp_active_hostname = primary_hostname;
5019 if (raw_active_hostname != NULL)
5021 uschar *nah = expand_string(raw_active_hostname);
5024 if (!f.expand_string_forcedfail)
5025 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5026 "(smtp_active_hostname): %s", raw_active_hostname,
5027 expand_string_message);
5029 else if (nah[0] != 0) smtp_active_hostname = nah;
5032 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5033 given IP address so that the blocking and relay configuration can be tested.
5034 Unless a sender_ident was set by -oMt, we discard it (the default is the
5035 caller's login name). An RFC 1413 call is made only if we are running in the
5036 test harness and an incoming interface and both ports are specified, because
5037 there is no TCP/IP call to find the ident for. */
5044 if (!sender_ident_set)
5046 sender_ident = NULL;
5047 if (f.running_in_test_harness && sender_host_port
5048 && interface_address && interface_port)
5049 verify_get_ident(1223); /* note hardwired port number */
5052 /* In case the given address is a non-canonical IPv6 address, canonicalize
5053 it. The code works for both IPv4 and IPv6, as it happens. */
5055 size = host_aton(sender_host_address, x);
5056 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5057 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5059 /* Now set up for testing */
5061 host_build_sender_fullhost();
5065 f.sender_local = FALSE;
5066 f.sender_host_notsocket = TRUE;
5067 debug_file = stderr;
5068 debug_fd = fileno(debug_file);
5069 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5070 "**** but without any ident (RFC 1413) callback.\n"
5071 "**** This is not for real!\n\n",
5072 sender_host_address);
5074 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5075 if (verify_check_host(&hosts_connection_nolog) == OK)
5076 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5077 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5079 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5080 because a log line has already been written for all its failure exists
5081 (usually "connection refused: <reason>") and writing another one is
5082 unnecessary clutter. */
5084 if (smtp_start_session())
5086 for (; (reset_point = store_mark()); store_reset(reset_point))
5088 if (smtp_setup_msg() <= 0) break;
5089 if (!receive_msg(FALSE)) break;
5091 return_path = sender_address = NULL;
5092 dnslist_domain = dnslist_matched = NULL;
5093 #ifndef DISABLE_DKIM
5094 dkim_cur_signer = NULL;
5097 deliver_localpart_orig = NULL;
5098 deliver_domain_orig = NULL;
5099 callout_address = sending_ip_address = NULL;
5100 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5104 exim_exit(EXIT_SUCCESS, US"main");
5108 /* Arrange for message reception if recipients or SMTP were specified;
5109 otherwise complain unless a version print (-bV) happened or this is a filter
5110 verification test or info dump.
5111 In the former case, show the configuration file name. */
5113 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5115 if (version_printed)
5117 if (Ustrchr(config_main_filelist, ':'))
5118 printf("Configuration file search path is %s\n", config_main_filelist);
5119 printf("Configuration file is %s\n", config_main_filename);
5120 return EXIT_SUCCESS;
5123 if (info_flag != CMDINFO_NONE)
5125 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5126 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5129 if (filter_test == FTEST_NONE)
5130 exim_usage(called_as);
5134 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5135 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5136 that we are not called from inetd, because that is rejected above. The
5137 following configuration settings are forced here:
5139 (1) Synchronous delivery (-odi)
5140 (2) Errors to stderr (-oep == -oeq)
5141 (3) No parallel remote delivery
5142 (4) Unprivileged delivery
5144 We don't force overall queueing options because there are several of them;
5145 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5146 to override any SMTP queueing. */
5150 f.synchronous_delivery = TRUE;
5151 arg_error_handling = ERRORS_STDERR;
5152 remote_max_parallel = 1;
5153 deliver_drop_privilege = TRUE;
5154 f.queue_smtp = FALSE;
5155 queue_smtp_domains = NULL;
5157 message_utf8_downconvert = -1; /* convert-if-needed */
5162 /* Prepare to accept one or more new messages on the standard input. When a
5163 message has been read, its id is returned in message_id[]. If doing immediate
5164 delivery, we fork a delivery process for each received message, except for the
5165 last one, where we can save a process switch.
5167 It is only in non-smtp mode that error_handling is allowed to be changed from
5168 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5169 sendmail error modes other than -oem ever actually used? Later: yes.) */
5171 if (!smtp_input) error_handling = arg_error_handling;
5173 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5174 logging being sent down the socket and make an identd call to get the
5177 else if (f.is_inetd)
5179 (void)fclose(stderr);
5180 exim_nullstd(); /* Re-open to /dev/null */
5181 verify_get_ident(IDENT_PORT);
5182 host_build_sender_fullhost();
5183 set_process_info("handling incoming connection from %s via inetd",
5187 /* If the sender host address has been set, build sender_fullhost if it hasn't
5188 already been done (which it will have been for inetd). This caters for the
5189 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5190 so that the test for IP options is skipped for -bs input. */
5192 if (sender_host_address && !sender_fullhost)
5194 host_build_sender_fullhost();
5195 set_process_info("handling incoming connection from %s via -oMa",
5197 f.sender_host_notsocket = TRUE;
5200 /* Otherwise, set the sender host as unknown except for inetd calls. This
5201 prevents host checking in the case of -bs not from inetd and also for -bS. */
5203 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5205 /* If stdout does not exist, then dup stdin to stdout. This can happen
5206 if exim is started from inetd. In this case fd 0 will be set to the socket,
5207 but fd 1 will not be set. This also happens for passed SMTP channels. */
5209 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5211 /* Set up the incoming protocol name and the state of the program. Root is
5212 allowed to force received protocol via the -oMr option above. If we have come
5213 via inetd, the process info has already been set up. We don't set
5214 received_protocol here for smtp input, as it varies according to
5215 batch/HELO/EHLO/AUTH/TLS. */
5219 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5220 smtp_batched_input? "batched " : "",
5221 (sender_address!= NULL)? sender_address : originator_login);
5225 int old_pool = store_pool;
5226 store_pool = POOL_PERM;
5227 if (!received_protocol)
5228 received_protocol = string_sprintf("local%s", called_as);
5229 store_pool = old_pool;
5230 set_process_info("accepting a local non-SMTP message from <%s>",
5234 /* Initialize the session_local_queue-only flag (this will be ignored if
5235 mua_wrapper is set) */
5238 session_local_queue_only = queue_only;
5240 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5241 the spool if so configured. On failure, we must not attempt to send an error
5242 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5243 error code is given.) */
5245 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5246 exim_fail("exim: insufficient disk space\n");
5248 /* If this is smtp input of any kind, real or batched, handle the start of the
5251 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5252 because a log line has already been written for all its failure exists
5253 (usually "connection refused: <reason>") and writing another one is
5254 unnecessary clutter. */
5260 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5261 if (verify_check_host(&hosts_connection_nolog) == OK)
5262 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5263 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5264 if (!smtp_start_session())
5267 exim_exit(EXIT_SUCCESS, US"smtp_start toplevel");
5271 /* Otherwise, set up the input size limit here. */
5275 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5276 if (expand_string_message)
5277 if (thismessage_size_limit == -1)
5278 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5279 "message_size_limit: %s", expand_string_message);
5281 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5282 "message_size_limit: %s", expand_string_message);
5285 /* Loop for several messages when reading SMTP input. If we fork any child
5286 processes, we don't want to wait for them unless synchronous delivery is
5287 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5288 same as SIG_DFL, despite the fact that documentation often lists the default as
5289 "ignore". This is a confusing area. This is what I know:
5291 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5292 processes that complete simply to go away without ever becoming defunct. You
5293 can't then wait for them - but we don't want to wait for them in the
5294 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5295 happen for all OS (e.g. *BSD is different).
5297 But that's not the end of the story. Some (many? all?) systems have the
5298 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5299 has by default, so it seems that the difference is merely one of default
5300 (compare restarting vs non-restarting signals).
5302 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5303 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5304 of the loop below. Paranoia rules.
5306 February 2003: That's *still* not the end of the story. There are now versions
5307 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5308 process then calls waitpid(), a grumble is written to the system log, because
5309 this is logically inconsistent. In other words, it doesn't like the paranoia.
5310 As a consequence of this, the waitpid() below is now excluded if we are sure
5311 that SIG_IGN works. */
5313 if (!f.synchronous_delivery)
5316 struct sigaction act;
5317 act.sa_handler = SIG_IGN;
5318 sigemptyset(&(act.sa_mask));
5319 act.sa_flags = SA_NOCLDWAIT;
5320 sigaction(SIGCHLD, &act, NULL);
5322 signal(SIGCHLD, SIG_IGN);
5326 /* Save the current store pool point, for resetting at the start of
5327 each message, and save the real sender address, if any. */
5329 real_sender_address = sender_address;
5331 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5332 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5337 reset_point = store_mark();
5340 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5341 input and build the recipients list, before calling receive_msg() to read the
5342 message proper. Whatever sender address is given in the SMTP transaction is
5343 often ignored for local senders - we use the actual sender, which is normally
5344 either the underlying user running this process or a -f argument provided by
5345 a trusted caller. It is saved in real_sender_address. The test for whether to
5346 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5351 if ((rc = smtp_setup_msg()) > 0)
5353 if (real_sender_address != NULL &&
5354 !receive_check_set_sender(sender_address))
5356 sender_address = raw_sender = real_sender_address;
5357 sender_address_unrewritten = NULL;
5360 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5361 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5362 the very end. The result of the ACL is ignored (as for other non-SMTP
5363 messages). It is run for its potential side effects. */
5365 if (smtp_batched_input && acl_not_smtp_start != NULL)
5367 uschar *user_msg, *log_msg;
5368 f.enable_dollar_recipients = TRUE;
5369 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5370 &user_msg, &log_msg);
5371 f.enable_dollar_recipients = FALSE;
5374 /* Now get the data for the message */
5376 more = receive_msg(extract_recipients);
5377 if (message_id[0] == 0)
5379 cancel_cutthrough_connection(TRUE, US"receive dropped");
5380 if (more) goto moreloop;
5381 smtp_log_no_mail(); /* Log no mail if configured */
5382 exim_exit(EXIT_FAILURE, US"receive toplevel");
5387 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5388 smtp_log_no_mail(); /* Log no mail if configured */
5389 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS, US"msg setup toplevel");
5393 /* In the non-SMTP case, we have all the information from the command
5394 line, but must process it in case it is in the more general RFC822
5395 format, and in any case, to detect syntax errors. Also, it appears that
5396 the use of comma-separated lists as single arguments is common, so we
5397 had better support them. */
5402 int count = argc - recipients_arg;
5403 uschar **list = argv + recipients_arg;
5405 /* These options cannot be changed dynamically for non-SMTP messages */
5407 f.active_local_sender_retain = local_sender_retain;
5408 f.active_local_from_check = local_from_check;
5410 /* Save before any rewriting */
5412 raw_sender = string_copy(sender_address);
5414 /* Loop for each argument (supplied by user hence tainted) */
5416 for (int i = 0; i < count; i++)
5418 int start, end, domain;
5420 uschar * s = string_copy_taint(list[i], TRUE);
5422 /* Loop for each comma-separated address */
5426 BOOL finished = FALSE;
5428 uschar *ss = parse_find_address_end(s, FALSE);
5430 if (*ss == ',') *ss = 0; else finished = TRUE;
5432 /* Check max recipients - if -t was used, these aren't recipients */
5434 if (recipients_max > 0 && ++rcount > recipients_max &&
5435 !extract_recipients)
5436 if (error_handling == ERRORS_STDERR)
5438 fprintf(stderr, "exim: too many recipients\n");
5439 exim_exit(EXIT_FAILURE, US"main");
5443 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5444 errors_sender_rc : EXIT_FAILURE;
5448 BOOL b = allow_utf8_domains;
5449 allow_utf8_domains = TRUE;
5452 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5455 if (string_is_utf8(recipient))
5456 message_smtputf8 = TRUE;
5458 allow_utf8_domains = b;
5461 if (domain == 0 && !f.allow_unqualified_recipient)
5464 errmess = US"unqualified recipient address not allowed";
5468 if (error_handling == ERRORS_STDERR)
5470 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5471 string_printing(list[i]), errmess);
5472 exim_exit(EXIT_FAILURE, US"main");
5478 eblock.text1 = string_printing(list[i]);
5479 eblock.text2 = errmess;
5481 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5482 errors_sender_rc : EXIT_FAILURE;
5485 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5488 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5492 /* Show the recipients when debugging */
5496 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5497 if (recipients_list)
5499 debug_printf("Recipients:\n");
5500 for (int i = 0; i < recipients_count; i++)
5501 debug_printf(" %s\n", recipients_list[i].address);
5505 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5506 ignored; rejecting here would just add complication, and it can just as
5507 well be done later. Allow $recipients to be visible in the ACL. */
5509 if (acl_not_smtp_start)
5511 uschar *user_msg, *log_msg;
5512 f.enable_dollar_recipients = TRUE;
5513 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5514 &user_msg, &log_msg);
5515 f.enable_dollar_recipients = FALSE;
5518 /* Pause for a while waiting for input. If none received in that time,
5519 close the logfile, if we had one open; then if we wait for a long-running
5520 datasource (months, in one use-case) log rotation will not leave us holding
5523 if (!receive_timeout)
5525 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5528 FD_ZERO(&r); FD_SET(0, &r);
5529 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5532 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5533 will just read the headers for the message, and not write anything onto the
5536 message_ended = END_NOTENDED;
5537 more = receive_msg(extract_recipients);
5539 /* more is always FALSE here (not SMTP message) when reading a message
5540 for real; when reading the headers of a message for filter testing,
5541 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5543 if (message_id[0] == 0) exim_exit(EXIT_FAILURE, US"main");
5544 } /* Non-SMTP message reception */
5546 /* If this is a filter testing run, there are headers in store, but
5547 no message on the spool. Run the filtering code in testing mode, setting
5548 the domain to the qualify domain and the local part to the current user,
5549 unless they have been set by options. The prefix and suffix are left unset
5550 unless specified. The the return path is set to to the sender unless it has
5551 already been set from a return-path header in the message. */
5553 if (filter_test != FTEST_NONE)
5555 deliver_domain = (ftest_domain != NULL)?
5556 ftest_domain : qualify_domain_recipient;
5557 deliver_domain_orig = deliver_domain;
5558 deliver_localpart = (ftest_localpart != NULL)?
5559 ftest_localpart : originator_login;
5560 deliver_localpart_orig = deliver_localpart;
5561 deliver_localpart_prefix = ftest_prefix;
5562 deliver_localpart_suffix = ftest_suffix;
5563 deliver_home = originator_home;
5565 if (return_path == NULL)
5567 printf("Return-path copied from sender\n");
5568 return_path = string_copy(sender_address);
5571 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5572 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5574 receive_add_recipient(
5575 string_sprintf("%s%s%s@%s",
5576 (ftest_prefix == NULL)? US"" : ftest_prefix,
5578 (ftest_suffix == NULL)? US"" : ftest_suffix,
5579 deliver_domain), -1);
5581 printf("Recipient = %s\n", recipients_list[0].address);
5582 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5583 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5585 if (chdir("/")) /* Get away from wherever the user is running this from */
5587 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5588 exim_exit(EXIT_FAILURE, US"main");
5591 /* Now we run either a system filter test, or a user filter test, or both.
5592 In the latter case, headers added by the system filter will persist and be
5593 available to the user filter. We need to copy the filter variables
5596 if ((filter_test & FTEST_SYSTEM) != 0)
5597 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5598 exim_exit(EXIT_FAILURE, US"main");
5600 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5602 if ((filter_test & FTEST_USER) != 0)
5603 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5604 exim_exit(EXIT_FAILURE, US"main");
5606 exim_exit(EXIT_SUCCESS, US"main");
5609 /* Else act on the result of message reception. We should not get here unless
5610 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5611 will be TRUE. If it is not, check on the number of messages received in this
5614 if (!session_local_queue_only &&
5615 smtp_accept_queue_per_connection > 0 &&
5616 receive_messagecount > smtp_accept_queue_per_connection)
5618 session_local_queue_only = TRUE;
5619 queue_only_reason = 2;
5622 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5623 and queue_only_load is set, check that the load average is below it. If it is
5624 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5625 default), we put the whole session into queue_only mode. It then remains this
5626 way for any subsequent messages on the same SMTP connection. This is a
5627 deliberate choice; even though the load average may fall, it doesn't seem
5628 right to deliver later messages on the same call when not delivering earlier
5629 ones. However, there are odd cases where this is not wanted, so this can be
5630 changed by setting queue_only_load_latch false. */
5632 local_queue_only = session_local_queue_only;
5633 if (!local_queue_only && queue_only_load >= 0)
5635 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5636 if (local_queue_only)
5638 queue_only_reason = 3;
5639 if (queue_only_load_latch) session_local_queue_only = TRUE;
5643 /* If running as an MUA wrapper, all queueing options and freezing options
5647 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5649 /* Log the queueing here, when it will get a message id attached, but
5650 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5653 if (local_queue_only)
5655 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5656 switch(queue_only_reason)
5659 log_write(L_delay_delivery,
5660 LOG_MAIN, "no immediate delivery: more than %d messages "
5661 "received in one connection", smtp_accept_queue_per_connection);
5665 log_write(L_delay_delivery,
5666 LOG_MAIN, "no immediate delivery: load average %.2f",
5667 (double)load_average/1000.0);
5672 else if (f.queue_only_policy || f.deliver_freeze)
5673 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5675 /* Else do the delivery unless the ACL or local_scan() called for queue only
5676 or froze the message. Always deliver in a separate process. A fork failure is
5677 not a disaster, as the delivery will eventually happen on a subsequent queue
5678 run. The search cache must be tidied before the fork, as the parent will
5679 do it before exiting. The child will trigger a lookup failure and
5680 thereby defer the delivery if it tries to use (for example) a cached ldap
5681 connection that the parent has called unbind on. */
5688 if ((pid = fork()) == 0)
5691 close_unwanted(); /* Close unwanted file descriptors and TLS */
5692 exim_nullstd(); /* Ensure std{in,out,err} exist */
5694 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5695 mode, deliver_drop_privilege is forced TRUE). */
5697 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5699 delivery_re_exec(CEE_EXEC_EXIT);
5700 /* Control does not return here. */
5703 /* No need to re-exec */
5705 rc = deliver_message(message_id, FALSE, FALSE);
5707 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5708 ? EXIT_SUCCESS : EXIT_FAILURE, US"cmdline-delivery");
5713 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5714 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5715 "process: %s", strerror(errno));
5719 release_cutthrough_connection(US"msg passed for delivery");
5721 /* In the parent, wait if synchronous delivery is required. This will
5722 always be the case in MUA wrapper mode. */
5724 if (f.synchronous_delivery)
5727 while (wait(&status) != pid);
5728 if ((status & 0x00ff) != 0)
5729 log_write(0, LOG_MAIN|LOG_PANIC,
5730 "process %d crashed with signal %d while delivering %s",
5731 (int)pid, status & 0x00ff, message_id);
5732 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE, US"main");
5737 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5738 automatically reaps children (see comments above the loop), clear away any
5739 finished subprocesses here, in case there are lots of messages coming in
5740 from the same source. */
5742 #ifndef SIG_IGN_WORKS
5743 while (waitpid(-1, NULL, WNOHANG) > 0);
5747 return_path = sender_address = NULL;
5748 authenticated_sender = NULL;
5749 deliver_localpart_orig = NULL;
5750 deliver_domain_orig = NULL;
5751 deliver_host = deliver_host_address = NULL;
5752 dnslist_domain = dnslist_matched = NULL;
5753 #ifdef WITH_CONTENT_SCAN
5754 malware_name = NULL;
5756 callout_address = NULL;
5757 sending_ip_address = NULL;
5759 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5761 store_reset(reset_point);
5764 exim_exit(EXIT_SUCCESS, US"main"); /* Never returns */
5765 return 0; /* To stop compiler warning */