1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void *block) { block = block; }
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void *block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
282 sig = sig; /* Keep picky compilers happy */
284 os_non_restarting_signal(SIGALRM, sigalrm_handler);
289 /*************************************************
290 * Sleep for a fractional time interval *
291 *************************************************/
293 /* This function is called by millisleep() and exim_wait_tick() to wait for a
294 period of time that may include a fraction of a second. The coding is somewhat
295 tedious. We do not expect setitimer() ever to fail, but if it does, the process
296 will wait for ever, so we panic in this instance. (There was a case of this
297 when a bug in a function that calls milliwait() caused it to pass invalid data.
298 That's when I added the check. :-)
300 We assume it to be not worth sleeping for under 50us; this value will
301 require revisiting as hardware advances. This avoids the issue of
302 a zero-valued timer setting meaning "never fire".
304 Argument: an itimerval structure containing the interval
309 milliwait(struct itimerval *itval)
312 sigset_t old_sigmask;
313 int save_errno = errno;
315 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
317 (void)sigemptyset(&sigmask); /* Empty mask */
318 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
319 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
320 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
321 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
322 "setitimer() failed: %s", strerror(errno));
323 (void)sigfillset(&sigmask); /* All signals */
324 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
325 (void)sigsuspend(&sigmask); /* Until SIGALRM */
326 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
328 sigalrm_seen = FALSE;
334 /*************************************************
335 * Millisecond sleep function *
336 *************************************************/
338 /* The basic sleep() function has a granularity of 1 second, which is too rough
339 in some cases - for example, when using an increasing delay to slow down
342 Argument: number of millseconds
349 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
350 .it_value = {.tv_sec = msec/1000,
351 .tv_usec = (msec % 1000) * 1000}};
357 /*************************************************
358 * Compare microsecond times *
359 *************************************************/
366 Returns: -1, 0, or +1
370 exim_tvcmp(struct timeval *t1, struct timeval *t2)
372 if (t1->tv_sec > t2->tv_sec) return +1;
373 if (t1->tv_sec < t2->tv_sec) return -1;
374 if (t1->tv_usec > t2->tv_usec) return +1;
375 if (t1->tv_usec < t2->tv_usec) return -1;
382 /*************************************************
383 * Clock tick wait function *
384 *************************************************/
386 #ifdef _POSIX_MONOTONIC_CLOCK
387 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
388 static struct timespec offset_ts;
391 exim_clock_init(void)
394 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
395 (void)gettimeofday(&tv, NULL);
396 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
397 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
398 if (offset_ts.tv_nsec >= 0) return;
400 offset_ts.tv_nsec += 1000*1000*1000;
405 /* Exim uses a time + a pid to generate a unique identifier in two places: its
406 message IDs, and in file names for maildir deliveries. Because some OS now
407 re-use pids within the same second, sub-second times are now being used.
408 However, for absolute certainty, we must ensure the clock has ticked before
409 allowing the relevant process to complete. At the time of implementation of
410 this code (February 2003), the speed of processors is such that the clock will
411 invariably have ticked already by the time a process has done its job. This
412 function prepares for the time when things are faster - and it also copes with
413 clocks that go backwards.
416 tgt_tv A timeval which was used to create uniqueness; its usec field
417 has been rounded down to the value of the resolution.
418 We want to be sure the current time is greater than this.
419 resolution The resolution that was used to divide the microseconds
420 (1 for maildir, larger for message ids)
426 exim_wait_tick(struct timeval * tgt_tv, int resolution)
428 struct timeval now_tv;
429 long int now_true_usec;
431 #ifdef _POSIX_MONOTONIC_CLOCK
432 struct timespec now_ts;
434 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
436 now_ts.tv_sec += offset_ts.tv_sec;
437 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
440 now_ts.tv_nsec -= 1000*1000*1000;
442 now_tv.tv_sec = now_ts.tv_sec;
443 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
444 now_tv.tv_usec = now_true_usec;
449 (void)gettimeofday(&now_tv, NULL);
450 now_true_usec = now_tv.tv_usec;
451 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
454 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
456 struct itimerval itval;
457 itval.it_interval.tv_sec = 0;
458 itval.it_interval.tv_usec = 0;
459 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
460 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
462 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
463 negative value for the microseconds is possible only in the case when "now"
464 is more than a second less than "tgt". That means that itval.it_value.tv_sec
465 is greater than zero. The following correction is therefore safe. */
467 if (itval.it_value.tv_usec < 0)
469 itval.it_value.tv_usec += 1000000;
470 itval.it_value.tv_sec -= 1;
473 DEBUG(D_transport|D_receive)
475 if (!f.running_in_test_harness)
477 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
478 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
479 now_tv.tv_sec, (long) now_tv.tv_usec);
480 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
481 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
487 /* Be prapared to go around if the kernel does not implement subtick
488 granularity (GNU Hurd) */
490 (void)gettimeofday(&now_tv, NULL);
491 now_true_usec = now_tv.tv_usec;
492 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
499 /*************************************************
500 * Call fopen() with umask 777 and adjust mode *
501 *************************************************/
503 /* Exim runs with umask(0) so that files created with open() have the mode that
504 is specified in the open() call. However, there are some files, typically in
505 the spool directory, that are created with fopen(). They end up world-writeable
506 if no precautions are taken. Although the spool directory is not accessible to
507 the world, this is an untidiness. So this is a wrapper function for fopen()
508 that sorts out the mode of the created file.
511 filename the file name
512 options the fopen() options
513 mode the required mode
515 Returns: the fopened FILE or NULL
519 modefopen(const uschar *filename, const char *options, mode_t mode)
521 mode_t saved_umask = umask(0777);
522 FILE *f = Ufopen(filename, options);
523 (void)umask(saved_umask);
524 if (f != NULL) (void)fchmod(fileno(f), mode);
529 /*************************************************
530 * Ensure stdin, stdout, and stderr exist *
531 *************************************************/
533 /* Some operating systems grumble if an exec() happens without a standard
534 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
535 file will be opened and will use these fd values, and then some other bit of
536 code will assume, for example, that it can write error messages to stderr.
537 This function ensures that fds 0, 1, and 2 are open if they do not already
538 exist, by connecting them to /dev/null.
540 This function is also used to ensure that std{in,out,err} exist at all times,
541 so that if any library that Exim calls tries to use them, it doesn't crash.
552 for (int i = 0; i <= 2; i++)
554 if (fstat(i, &statbuf) < 0 && errno == EBADF)
556 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
557 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
558 string_open_failed(errno, "/dev/null", NULL));
559 if (devnull != i) (void)dup2(devnull, i);
562 if (devnull > 2) (void)close(devnull);
568 /*************************************************
569 * Close unwanted file descriptors for delivery *
570 *************************************************/
572 /* This function is called from a new process that has been forked to deliver
573 an incoming message, either directly, or using exec.
575 We want any smtp input streams to be closed in this new process. However, it
576 has been observed that using fclose() here causes trouble. When reading in -bS
577 input, duplicate copies of messages have been seen. The files will be sharing a
578 file pointer with the parent process, and it seems that fclose() (at least on
579 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
580 least sometimes. Hence we go for closing the underlying file descriptors.
582 If TLS is active, we want to shut down the TLS library, but without molesting
583 the parent's SSL connection.
585 For delivery of a non-SMTP message, we want to close stdin and stdout (and
586 stderr unless debugging) because the calling process might have set them up as
587 pipes and be waiting for them to close before it waits for the submission
588 process to terminate. If they aren't closed, they hold up the calling process
589 until the initial delivery process finishes, which is not what we want.
591 Exception: We do want it for synchronous delivery!
593 And notwithstanding all the above, if D_resolver is set, implying resolver
594 debugging, leave stdout open, because that's where the resolver writes its
597 When we close stderr (which implies we've also closed stdout), we also get rid
598 of any controlling terminal.
610 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
612 (void)close(fileno(smtp_in));
613 (void)close(fileno(smtp_out));
618 (void)close(0); /* stdin */
619 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
620 if (debug_selector == 0) /* stderr */
622 if (!f.synchronous_delivery)
635 /*************************************************
637 *************************************************/
639 /* This function sets a new uid and gid permanently, optionally calling
640 initgroups() to set auxiliary groups. There are some special cases when running
641 Exim in unprivileged modes. In these situations the effective uid will not be
642 root; if we already have the right effective uid/gid, and don't need to
643 initialize any groups, leave things as they are.
648 igflag TRUE if initgroups() wanted
649 msg text to use in debugging output and failure log
651 Returns: nothing; bombs out on failure
655 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
657 uid_t euid = geteuid();
658 gid_t egid = getegid();
660 if (euid == root_uid || euid != uid || egid != gid || igflag)
662 /* At least one OS returns +1 for initgroups failure, so just check for
667 struct passwd *pw = getpwuid(uid);
669 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
670 "no passwd entry for uid=%ld", (long int)uid);
672 if (initgroups(pw->pw_name, gid) != 0)
673 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
674 (long int)uid, strerror(errno));
677 if (setgid(gid) < 0 || setuid(uid) < 0)
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
679 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
682 /* Debugging output included uid/gid and all groups */
686 int group_count, save_errno;
687 gid_t group_list[EXIM_GROUPLIST_SIZE];
688 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
689 (long int)geteuid(), (long int)getegid(), (long int)getpid());
690 group_count = getgroups(nelem(group_list), group_list);
692 debug_printf(" auxiliary group list:");
694 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
695 else if (group_count < 0)
696 debug_printf(" <error: %s>", strerror(save_errno));
697 else debug_printf(" <none>");
705 /*************************************************
707 *************************************************/
709 /* Exim exits via this function so that it always clears up any open
715 Returns: does not return
724 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
725 ">>>>>>>>>>>>>>>>\n",
726 (int)getpid(), process_purpose, rc);
732 exim_underbar_exit(int rc)
736 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
737 ">>>>>>>>>>>>>>>>\n",
738 (int)getpid(), process_purpose, rc);
744 /* Print error string, then die */
746 exim_fail(const char * fmt, ...)
750 vfprintf(stderr, fmt, ap);
754 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
755 of chown()/fchown(). See src/functions.h for more explanation */
757 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
759 int saved_errno = errno; /* from the preceeding chown call */
761 log_write(0, LOG_MAIN|LOG_PANIC,
762 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
763 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
764 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
766 /* I leave this here, commented, in case the "bug"(?) comes up again.
767 It is not an Exim bug, but we can provide a workaround.
773 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
775 if (buf.st_uid == owner && buf.st_gid == group) return 0;
776 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
778 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
786 /*************************************************
787 * Extract port from host address *
788 *************************************************/
790 /* Called to extract the port from the values given to -oMa and -oMi.
791 It also checks the syntax of the address, and terminates it before the
792 port data when a port is extracted.
795 address the address, with possible port on the end
797 Returns: the port, or zero if there isn't one
798 bombs out on a syntax error
802 check_port(uschar *address)
804 int port = host_address_extract_port(address);
805 if (string_is_ip_address(address, NULL) == 0)
806 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
812 /*************************************************
813 * Test/verify an address *
814 *************************************************/
816 /* This function is called by the -bv and -bt code. It extracts a working
817 address from a full RFC 822 address. This isn't really necessary per se, but it
818 has the effect of collapsing source routes.
822 flags flag bits for verify_address()
823 exit_value to be set for failures
829 test_address(uschar *s, int flags, int *exit_value)
831 int start, end, domain;
832 uschar *parse_error = NULL;
833 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
837 fprintf(stdout, "syntax error: %s\n", parse_error);
842 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
843 -1, -1, NULL, NULL, NULL);
844 if (rc == FAIL) *exit_value = 2;
845 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
851 /*************************************************
852 * Show supported features *
853 *************************************************/
856 show_db_version(FILE * f)
858 #ifdef DB_VERSION_STRING
861 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
862 fprintf(f, " Runtime: %s\n",
863 db_version(NULL, NULL, NULL));
866 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
868 #elif defined(BTREEVERSION) && defined(HASHVERSION)
870 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
872 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
875 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
876 fprintf(f, "Probably ndbm\n");
877 #elif defined(USE_TDB)
878 fprintf(f, "Using tdb\n");
881 fprintf(f, "Probably GDBM (native mode)\n");
883 fprintf(f, "Probably GDBM (compatibility mode)\n");
889 /* This function is called for -bV/--version and for -d to output the optional
890 features of the current Exim binary.
892 Arguments: a FILE for printing
897 show_whats_supported(FILE * fp)
899 rmark reset_point = store_mark();
901 DEBUG(D_any) {} else show_db_version(fp);
903 g = string_cat(NULL, US"Support for:");
904 #ifdef SUPPORT_CRYPTEQ
905 g = string_cat(g, US" crypteq");
908 g = string_cat(g, US" iconv()");
911 g = string_cat(g, US" IPv6");
913 #ifdef HAVE_SETCLASSRESOURCES
914 g = string_cat(g, US" use_setclassresources");
917 g = string_cat(g, US" PAM");
920 g = string_cat(g, US" Perl");
923 g = string_cat(g, US" Expand_dlfunc");
925 #ifdef USE_TCP_WRAPPERS
926 g = string_cat(g, US" TCPwrappers");
929 g = string_cat(g, US" GnuTLS");
932 g = string_cat(g, US" OpenSSL");
934 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
935 g = string_cat(g, US" translate_ip_address");
937 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
938 g = string_cat(g, US" move_frozen_messages");
940 #ifdef WITH_CONTENT_SCAN
941 g = string_cat(g, US" Content_Scanning");
944 g = string_cat(g, US" DANE");
947 g = string_cat(g, US" DKIM");
949 #ifndef DISABLE_DNSSEC
950 g = string_cat(g, US" DNSSEC");
952 #ifndef DISABLE_EVENT
953 g = string_cat(g, US" Event");
956 g = string_cat(g, US" I18N");
959 g = string_cat(g, US" OCSP");
961 #ifndef DISABLE_PIPE_CONNECT
962 g = string_cat(g, US" PIPE_CONNECT");
965 g = string_cat(g, US" PRDR");
968 g = string_cat(g, US" PROXY");
971 g = string_cat(g, US" SOCKS");
974 g = string_cat(g, US" SPF");
977 g = string_cat(g, US" DMARC");
981 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
983 #ifdef EXPERIMENTAL_ARC
984 g = string_cat(g, US" Experimental_ARC");
986 #ifdef EXPERIMENTAL_BRIGHTMAIL
987 g = string_cat(g, US" Experimental_Brightmail");
989 #ifdef EXPERIMENTAL_DCC
990 g = string_cat(g, US" Experimental_DCC");
992 #ifdef EXPERIMENTAL_DSN_INFO
993 g = string_cat(g, US" Experimental_DSN_info");
995 #ifdef EXPERIMENTAL_LMDB
996 g = string_cat(g, US" Experimental_LMDB");
998 #ifdef EXPERIMENTAL_QUEUE_RAMP
999 g = string_cat(g, US" Experimental_Queue_Ramp");
1001 #ifdef EXPERIMENTAL_QUEUEFILE
1002 g = string_cat(g, US" Experimental_QUEUEFILE");
1004 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1005 g = string_cat(g, US" Experimental_SRS");
1007 #ifdef EXPERIMENTAL_TLS_RESUME
1008 g = string_cat(g, US" Experimental_TLS_resume");
1010 g = string_cat(g, US"\n");
1012 g = string_cat(g, US"Lookups (built-in):");
1013 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1014 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1016 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1017 g = string_cat(g, US" cdb");
1019 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1020 g = string_cat(g, US" dbm dbmjz dbmnz");
1022 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1023 g = string_cat(g, US" dnsdb");
1025 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1026 g = string_cat(g, US" dsearch");
1028 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1029 g = string_cat(g, US" ibase");
1031 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1032 g = string_cat(g, US" json");
1034 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1035 g = string_cat(g, US" ldap ldapdn ldapm");
1037 #ifdef EXPERIMENTAL_LMDB
1038 g = string_cat(g, US" lmdb");
1040 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1041 g = string_cat(g, US" mysql");
1043 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1044 g = string_cat(g, US" nis nis0");
1046 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1047 g = string_cat(g, US" nisplus");
1049 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1050 g = string_cat(g, US" oracle");
1052 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1053 g = string_cat(g, US" passwd");
1055 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1056 g = string_cat(g, US" pgsql");
1058 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1059 g = string_cat(g, US" redis");
1061 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1062 g = string_cat(g, US" sqlite");
1064 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1065 g = string_cat(g, US" testdb");
1067 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1068 g = string_cat(g, US" whoson");
1070 g = string_cat(g, US"\n");
1072 g = auth_show_supported(g);
1073 g = route_show_supported(g);
1074 g = transport_show_supported(g);
1076 #ifdef WITH_CONTENT_SCAN
1077 g = malware_show_supported(g);
1080 if (fixed_never_users[0] > 0)
1083 g = string_cat(g, US"Fixed never_users: ");
1084 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1085 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1086 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1089 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1090 fputs(CS string_from_gstring(g), fp);
1092 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1094 /* Everything else is details which are only worth reporting when debugging.
1095 Perhaps the tls_version_report should move into this too. */
1098 /* clang defines __GNUC__ (at least, for me) so test for it first */
1099 #if defined(__clang__)
1100 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1101 #elif defined(__GNUC__)
1102 fprintf(fp, "Compiler: GCC [%s]\n",
1106 "? unknown version ?"
1110 fprintf(fp, "Compiler: <unknown>\n");
1113 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1114 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1115 __GLIBC__, __GLIBC_MINOR__);
1116 if (__GLIBC_PREREQ(2, 1))
1117 fprintf(fp, " Runtime: %s\n",
1118 gnu_get_libc_version());
1121 show_db_version(fp);
1124 tls_version_report(fp);
1127 utf8_version_report(fp);
1130 spf_lib_version_report(fp);
1133 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1134 if (authi->version_report)
1135 (*authi->version_report)(fp);
1137 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1138 characters; unless it's an ancient version of PCRE in which case it
1140 #ifndef PCRE_PRERELEASE
1141 # define PCRE_PRERELEASE
1144 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1145 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1147 PCRE_MAJOR, PCRE_MINOR,
1148 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1151 #undef EXPAND_AND_QUOTE
1154 for (int i = 0; i < lookup_list_count; i++)
1155 if (lookup_list[i]->version_report)
1156 lookup_list[i]->version_report(fp);
1158 #ifdef WHITELIST_D_MACROS
1159 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1161 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1163 #ifdef TRUSTED_CONFIG_LIST
1164 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1166 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1170 store_reset(reset_point);
1174 /*************************************************
1175 * Show auxiliary information about Exim *
1176 *************************************************/
1179 show_exim_information(enum commandline_info request, FILE *stream)
1184 fprintf(stream, "Oops, something went wrong.\n");
1188 "The -bI: flag takes a string indicating which information to provide.\n"
1189 "If the string is not recognised, you'll get this help (on stderr).\n"
1191 " exim -bI:help this information\n"
1192 " exim -bI:dscp list of known dscp value keywords\n"
1193 " exim -bI:sieve list of supported sieve extensions\n"
1197 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1198 fprintf(stream, "%s\n", *pp);
1201 dscp_list_to_stream(stream);
1207 /*************************************************
1208 * Quote a local part *
1209 *************************************************/
1211 /* This function is used when a sender address or a From: or Sender: header
1212 line is being created from the caller's login, or from an authenticated_id. It
1213 applies appropriate quoting rules for a local part.
1215 Argument: the local part
1216 Returns: the local part, quoted if necessary
1220 local_part_quote(uschar *lpart)
1222 BOOL needs_quote = FALSE;
1225 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1227 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1228 (*t != '.' || t == lpart || t[1] == 0);
1231 if (!needs_quote) return lpart;
1233 g = string_catn(NULL, US"\"", 1);
1237 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1240 g = string_cat(g, lpart);
1243 g = string_catn(g, lpart, nq - lpart);
1244 g = string_catn(g, US"\\", 1);
1245 g = string_catn(g, nq, 1);
1249 g = string_catn(g, US"\"", 1);
1250 return string_from_gstring(g);
1256 /*************************************************
1257 * Load readline() functions *
1258 *************************************************/
1260 /* This function is called from testing executions that read data from stdin,
1261 but only when running as the calling user. Currently, only -be does this. The
1262 function loads the readline() function library and passes back the functions.
1263 On some systems, it needs the curses library, so load that too, but try without
1264 it if loading fails. All this functionality has to be requested at build time.
1267 fn_readline_ptr pointer to where to put the readline pointer
1268 fn_addhist_ptr pointer to where to put the addhistory function
1270 Returns: the dlopen handle or NULL on failure
1274 set_readline(char * (**fn_readline_ptr)(const char *),
1275 void (**fn_addhist_ptr)(const char *))
1278 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1280 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1281 if (dlhandle_curses) dlclose(dlhandle_curses);
1285 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1286 * char * readline (const char *prompt);
1287 * void add_history (const char *string);
1289 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1290 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1293 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1301 /*************************************************
1302 * Get a line from stdin for testing things *
1303 *************************************************/
1305 /* This function is called when running tests that can take a number of lines
1306 of input (for example, -be and -bt). It handles continuations and trailing
1307 spaces. And prompting and a blank line output on eof. If readline() is in use,
1308 the arguments are non-NULL and provide the relevant functions.
1311 fn_readline readline function or NULL
1312 fn_addhist addhist function or NULL
1314 Returns: pointer to dynamic memory, or NULL at end of file
1318 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1322 if (!fn_readline) { printf("> "); fflush(stdout); }
1324 for (int i = 0;; i++)
1326 uschar buffer[1024];
1330 char *readline_line = NULL;
1333 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1334 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1335 p = US readline_line;
1340 /* readline() not in use */
1343 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1347 /* Handle the line */
1349 ss = p + (int)Ustrlen(p);
1350 while (ss > p && isspace(ss[-1])) ss--;
1353 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1355 g = string_catn(g, p, ss - p);
1358 if (fn_readline) free(readline_line);
1361 /* g can only be NULL if ss==p */
1362 if (ss == p || g->s[g->ptr-1] != '\\')
1366 (void) string_from_gstring(g);
1369 if (!g) printf("\n");
1370 return string_from_gstring(g);
1375 /*************************************************
1376 * Output usage information for the program *
1377 *************************************************/
1379 /* This function is called when there are no recipients
1380 or a specific --help argument was added.
1383 progname information on what name we were called by
1385 Returns: DOES NOT RETURN
1389 exim_usage(uschar *progname)
1392 /* Handle specific program invocation variants */
1393 if (Ustrcmp(progname, US"-mailq") == 0)
1395 "mailq - list the contents of the mail queue\n\n"
1396 "For a list of options, see the Exim documentation.\n");
1398 /* Generic usage - we output this whatever happens */
1400 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1401 "not directly from a shell command line. Options and/or arguments control\n"
1402 "what it does when called. For a list of options, see the Exim documentation.\n");
1407 /*************************************************
1408 * Validate that the macros given are okay *
1409 *************************************************/
1411 /* Typically, Exim will drop privileges if macros are supplied. In some
1412 cases, we want to not do so.
1414 Arguments: opt_D_used - true if the commandline had a "-D" option
1415 Returns: true if trusted, false otherwise
1419 macros_trusted(BOOL opt_D_used)
1421 #ifdef WHITELIST_D_MACROS
1422 uschar *whitelisted, *end, *p, **whites;
1423 int white_count, i, n;
1425 BOOL prev_char_item, found;
1430 #ifndef WHITELIST_D_MACROS
1434 /* We only trust -D overrides for some invoking users:
1435 root, the exim run-time user, the optional config owner user.
1436 I don't know why config-owner would be needed, but since they can own the
1437 config files anyway, there's no security risk to letting them override -D. */
1438 if ( ! ((real_uid == root_uid)
1439 || (real_uid == exim_uid)
1440 #ifdef CONFIGURE_OWNER
1441 || (real_uid == config_uid)
1445 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1449 /* Get a list of macros which are whitelisted */
1450 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1451 prev_char_item = FALSE;
1453 for (p = whitelisted; *p != '\0'; ++p)
1455 if (*p == ':' || isspace(*p))
1460 prev_char_item = FALSE;
1463 if (!prev_char_item)
1464 prev_char_item = TRUE;
1471 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1472 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1477 if (i == white_count)
1479 while (*p != '\0' && p < end)
1485 /* The list of commandline macros should be very short.
1486 Accept the N*M complexity. */
1487 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1490 for (uschar ** w = whites; *w; ++w)
1491 if (Ustrcmp(*w, m->name) == 0)
1498 if (!m->replacement)
1500 if ((len = m->replen) == 0)
1502 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1503 0, PCRE_EOPT, NULL, 0);
1506 if (n != PCRE_ERROR_NOMATCH)
1507 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1511 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1517 /*************************************************
1518 * Expansion testing *
1519 *************************************************/
1521 /* Expand and print one item, doing macro-processing.
1524 item line for expansion
1528 expansion_test_line(uschar * line)
1533 Ustrncpy(big_buffer, line, big_buffer_size);
1534 big_buffer[big_buffer_size-1] = '\0';
1535 len = Ustrlen(big_buffer);
1537 (void) macros_expand(0, &len, &dummy_macexp);
1539 if (isupper(big_buffer[0]))
1541 if (macro_read_assignment(big_buffer))
1542 printf("Defined macro '%s'\n", mlast->name);
1545 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1546 else printf("Failed: %s\n", expand_string_message);
1551 /*************************************************
1552 * Entry point and high-level code *
1553 *************************************************/
1555 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1556 the appropriate action. All the necessary functions are present in the one
1557 binary. I originally thought one should split it up, but it turns out that so
1558 much of the apparatus is needed in each chunk that one might as well just have
1559 it all available all the time, which then makes the coding easier as well.
1562 argc count of entries in argv
1563 argv argument strings, with argv[0] being the program name
1565 Returns: EXIT_SUCCESS if terminated successfully
1566 EXIT_FAILURE otherwise, except when a message has been sent
1567 to the sender, and -oee was given
1571 main(int argc, char **cargv)
1573 uschar **argv = USS cargv;
1574 int arg_receive_timeout = -1;
1575 int arg_smtp_receive_timeout = -1;
1576 int arg_error_handling = error_handling;
1577 int filter_sfd = -1;
1578 int filter_ufd = -1;
1581 int list_queue_option = 0;
1583 int msg_action_arg = -1;
1584 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1585 int queue_only_reason = 0;
1587 int perl_start_option = 0;
1589 int recipients_arg = argc;
1590 int sender_address_domain = 0;
1591 int test_retry_arg = -1;
1592 int test_rewrite_arg = -1;
1593 gid_t original_egid;
1594 BOOL arg_queue_only = FALSE;
1595 BOOL bi_option = FALSE;
1596 BOOL checking = FALSE;
1597 BOOL count_queue = FALSE;
1598 BOOL expansion_test = FALSE;
1599 BOOL extract_recipients = FALSE;
1600 BOOL flag_G = FALSE;
1601 BOOL flag_n = FALSE;
1602 BOOL forced_delivery = FALSE;
1603 BOOL f_end_dot = FALSE;
1604 BOOL deliver_give_up = FALSE;
1605 BOOL list_queue = FALSE;
1606 BOOL list_options = FALSE;
1607 BOOL list_config = FALSE;
1608 BOOL local_queue_only;
1610 BOOL one_msg_action = FALSE;
1611 BOOL opt_D_used = FALSE;
1612 BOOL queue_only_set = FALSE;
1613 BOOL receiving_message = TRUE;
1614 BOOL sender_ident_set = FALSE;
1615 BOOL session_local_queue_only;
1617 BOOL removed_privilege = FALSE;
1618 BOOL usage_wanted = FALSE;
1619 BOOL verify_address_mode = FALSE;
1620 BOOL verify_as_sender = FALSE;
1621 BOOL version_printed = FALSE;
1622 uschar *alias_arg = NULL;
1623 uschar *called_as = US"";
1624 uschar *cmdline_syslog_name = NULL;
1625 uschar *start_queue_run_id = NULL;
1626 uschar *stop_queue_run_id = NULL;
1627 uschar *expansion_test_message = NULL;
1628 uschar *ftest_domain = NULL;
1629 uschar *ftest_localpart = NULL;
1630 uschar *ftest_prefix = NULL;
1631 uschar *ftest_suffix = NULL;
1632 uschar *log_oneline = NULL;
1633 uschar *malware_test_file = NULL;
1634 uschar *real_sender_address;
1635 uschar *originator_home = US"/";
1639 struct stat statbuf;
1640 pid_t passed_qr_pid = (pid_t)0;
1641 int passed_qr_pipe = -1;
1642 gid_t group_list[EXIM_GROUPLIST_SIZE];
1644 /* For the -bI: flag */
1645 enum commandline_info info_flag = CMDINFO_NONE;
1646 BOOL info_stdout = FALSE;
1648 /* Possible options for -R and -S */
1650 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1652 /* Need to define this in case we need to change the environment in order
1653 to get rid of a bogus time zone. We have to make it char rather than uschar
1654 because some OS define it in /usr/include/unistd.h. */
1656 extern char **environ;
1658 #ifdef MEASURE_TIMING
1659 (void)gettimeofday(×tamp_startup, NULL);
1662 /* If the Exim user and/or group and/or the configuration file owner/group were
1663 defined by ref:name at build time, we must now find the actual uid/gid values.
1664 This is a feature to make the lives of binary distributors easier. */
1666 #ifdef EXIM_USERNAME
1667 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1670 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1672 /* If ref:name uses a number as the name, route_finduser() returns
1673 TRUE with exim_uid set and pw coerced to NULL. */
1675 exim_gid = pw->pw_gid;
1676 #ifndef EXIM_GROUPNAME
1679 "exim: ref:name should specify a usercode, not a group.\n"
1680 "exim: can't let you get away with it unless you also specify a group.\n");
1684 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1687 #ifdef EXIM_GROUPNAME
1688 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1689 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1692 #ifdef CONFIGURE_OWNERNAME
1693 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1694 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1695 CONFIGURE_OWNERNAME);
1698 /* We default the system_filter_user to be the Exim run-time user, as a
1699 sane non-root value. */
1700 system_filter_uid = exim_uid;
1702 #ifdef CONFIGURE_GROUPNAME
1703 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1704 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1705 CONFIGURE_GROUPNAME);
1708 /* In the Cygwin environment, some initialization used to need doing.
1709 It was fudged in by means of this macro; now no longer but we'll leave
1710 it in case of others. */
1716 /* Check a field which is patched when we are running Exim within its
1717 testing harness; do a fast initial check, and then the whole thing. */
1719 f.running_in_test_harness =
1720 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1721 if (f.running_in_test_harness)
1724 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1725 at the start of a program; however, it seems that some environments do not
1726 follow this. A "strange" locale can affect the formatting of timestamps, so we
1729 setlocale(LC_ALL, "C");
1731 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1733 #ifdef _POSIX_MONOTONIC_CLOCK
1737 /* Set up the default handler for timing using alarm(). */
1739 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1741 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1742 because store_malloc writes a log entry on failure. */
1744 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1745 exim_fail("exim: failed to get store for log buffer\n");
1747 /* Initialize the default log options. */
1749 bits_set(log_selector, log_selector_size, log_default);
1751 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1752 NULL when the daemon is run and the file is closed. We have to use this
1753 indirection, because some systems don't allow writing to the variable "stderr".
1756 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1758 /* Arrange for the PCRE regex library to use our store functions. Note that
1759 the normal calls are actually macros that add additional arguments for
1760 debugging purposes so we have to assign specially constructed functions here.
1761 The default is to use store in the stacking pool, but this is overridden in the
1762 regex_must_compile() function. */
1764 pcre_malloc = function_store_get;
1765 pcre_free = function_dummy_free;
1767 /* Ensure there is a big buffer for temporary use in several places. It is put
1768 in malloc store so that it can be freed for enlargement if necessary. */
1770 big_buffer = store_malloc(big_buffer_size);
1772 /* Set up the handler for the data request signal, and set the initial
1773 descriptive text. */
1775 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1776 set_process_info("initializing");
1777 os_restarting_signal(SIGUSR1, usr1_handler);
1779 /* If running in a dockerized environment, the TERM signal is only
1780 delegated to the PID 1 if we request it by setting an signal handler */
1781 if (getpid() == 1) signal(SIGTERM, term_handler);
1783 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1784 in the daemon code. For the rest of Exim's uses, we ignore it. */
1786 signal(SIGHUP, SIG_IGN);
1788 /* We don't want to die on pipe errors as the code is written to handle
1789 the write error instead. */
1791 signal(SIGPIPE, SIG_IGN);
1793 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1794 set to SIG_IGN. This causes subprocesses that complete before the parent
1795 process waits for them not to hang around, so when Exim calls wait(), nothing
1796 is there. The wait() code has been made robust against this, but let's ensure
1797 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1798 ending status. We use sigaction rather than plain signal() on those OS where
1799 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1800 problem on AIX with this.) */
1804 struct sigaction act;
1805 act.sa_handler = SIG_DFL;
1806 sigemptyset(&(act.sa_mask));
1808 sigaction(SIGCHLD, &act, NULL);
1811 signal(SIGCHLD, SIG_DFL);
1814 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1819 /* Set up the version number. Set up the leading 'E' for the external form of
1820 message ids, set the pointer to the internal form, and initialize it to
1821 indicate no message being processed. */
1824 message_id_option[0] = '-';
1825 message_id_external = message_id_option + 1;
1826 message_id_external[0] = 'E';
1827 message_id = message_id_external + 1;
1830 /* Set the umask to zero so that any files Exim creates using open() are
1831 created with the modes that it specifies. NOTE: Files created with fopen() have
1832 a problem, which was not recognized till rather late (February 2006). With this
1833 umask, such files will be world writeable. (They are all content scanning files
1834 in the spool directory, which isn't world-accessible, so this is not a
1835 disaster, but it's untidy.) I don't want to change this overall setting,
1836 however, because it will interact badly with the open() calls. Instead, there's
1837 now a function called modefopen() that fiddles with the umask while calling
1842 /* Precompile the regular expression for matching a message id. Keep this in
1843 step with the code that generates ids in the accept.c module. We need to do
1844 this here, because the -M options check their arguments for syntactic validity
1845 using mac_ismsgid, which uses this. */
1848 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1850 /* Precompile the regular expression that is used for matching an SMTP error
1851 code, possibly extended, at the start of an error message. Note that the
1852 terminating whitespace character is included. */
1855 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1858 #ifdef WHITELIST_D_MACROS
1859 /* Precompile the regular expression used to filter the content of macros
1860 given to -D for permissibility. */
1862 regex_whitelisted_macro =
1863 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1866 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1868 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1869 this seems to be a generally accepted convention, since one finds symbolic
1870 links called "mailq" in standard OS configurations. */
1872 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1873 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1876 receiving_message = FALSE;
1877 called_as = US"-mailq";
1880 /* If the program is called as "rmail" treat it as equivalent to
1881 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1882 i.e. preventing a single dot on a line from terminating the message, and
1883 returning with zero return code, even in cases of error (provided an error
1884 message has been sent). */
1886 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1887 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1890 called_as = US"-rmail";
1891 errors_sender_rc = EXIT_SUCCESS;
1894 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1895 this is a smail convention. */
1897 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1898 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1900 smtp_input = smtp_batched_input = TRUE;
1901 called_as = US"-rsmtp";
1904 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1905 this is a smail convention. */
1907 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1908 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1911 receiving_message = FALSE;
1912 called_as = US"-runq";
1915 /* If the program is called as "newaliases" treat it as equivalent to
1916 "exim -bi"; this is a sendmail convention. */
1918 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1919 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1922 receiving_message = FALSE;
1923 called_as = US"-newaliases";
1926 /* Save the original effective uid for a couple of uses later. It should
1927 normally be root, but in some esoteric environments it may not be. */
1929 original_euid = geteuid();
1930 original_egid = getegid();
1932 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1933 to be the same as the real ones. This makes a difference only if Exim is setuid
1934 (or setgid) to something other than root, which could be the case in some
1935 special configurations. */
1937 real_uid = getuid();
1938 real_gid = getgid();
1940 if (real_uid == root_uid)
1942 if ((rv = setgid(real_gid)))
1943 exim_fail("exim: setgid(%ld) failed: %s\n",
1944 (long int)real_gid, strerror(errno));
1945 if ((rv = setuid(real_uid)))
1946 exim_fail("exim: setuid(%ld) failed: %s\n",
1947 (long int)real_uid, strerror(errno));
1950 /* If neither the original real uid nor the original euid was root, Exim is
1951 running in an unprivileged state. */
1953 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1955 /* For most of the args-parsing we need to use permanent pool memory */
1957 int old_pool = store_pool;
1958 store_pool = POOL_PERM;
1960 /* Scan the program's arguments. Some can be dealt with right away; others are
1961 simply recorded for checking and handling afterwards. Do a high-level switch
1962 on the second character (the one after '-'), to save some effort. */
1964 for (i = 1; i < argc; i++)
1966 BOOL badarg = FALSE;
1967 uschar * arg = argv[i];
1971 /* An argument not starting with '-' is the start of a recipients list;
1972 break out of the options-scanning loop. */
1980 /* An option consisting of -- terminates the options */
1982 if (Ustrcmp(arg, "--") == 0)
1984 recipients_arg = i + 1;
1988 /* Handle flagged options */
1990 switchchar = arg[1];
1993 /* Make all -ex options synonymous with -oex arguments, since that
1994 is assumed by various callers. Also make -qR options synonymous with -R
1995 options, as that seems to be required as well. Allow for -qqR too, and
1996 the same for -S options. */
1998 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1999 Ustrncmp(arg+1, "qR", 2) == 0 ||
2000 Ustrncmp(arg+1, "qS", 2) == 0)
2002 switchchar = arg[2];
2005 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2007 switchchar = arg[3];
2009 f.queue_2stage = TRUE;
2012 /* Make -r synonymous with -f, since it is a documented alias */
2014 else if (arg[1] == 'r') switchchar = 'f';
2016 /* Make -ov synonymous with -v */
2018 else if (Ustrcmp(arg, "-ov") == 0)
2024 /* deal with --option_aliases */
2025 else if (switchchar == '-')
2027 if (Ustrcmp(argrest, "help") == 0)
2029 usage_wanted = TRUE;
2032 else if (Ustrcmp(argrest, "version") == 0)
2039 /* High-level switch on active initial letter */
2044 /* sendmail uses -Ac and -Am to control which .cf file is used;
2047 if (!*argrest) { badarg = TRUE; break; }
2050 BOOL ignore = FALSE;
2055 if (*(argrest + 1) == '\0')
2059 if (!ignore) badarg = TRUE;
2063 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2064 so has no need of it. */
2067 if (!*argrest) i++; /* Skip over the type */
2073 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2077 /* -bd: Run in daemon mode, awaiting SMTP connections.
2078 -bdf: Ditto, but in the foreground.
2081 f.daemon_listen = TRUE;
2082 if (*argrest == 'f') f.background_daemon = FALSE;
2083 else if (*argrest) badarg = TRUE;
2086 /* -be: Run in expansion test mode
2087 -bem: Ditto, but read a message from a file first
2090 expansion_test = checking = TRUE;
2091 if (*argrest == 'm')
2093 if (++i >= argc) { badarg = TRUE; break; }
2094 expansion_test_message = argv[i];
2097 if (*argrest) badarg = TRUE;
2100 /* -bF: Run system filter test */
2102 filter_test |= checking = FTEST_SYSTEM;
2103 if (*argrest) badarg = TRUE;
2104 else if (++i < argc) filter_test_sfile = argv[i];
2105 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2108 /* -bf: Run user filter test
2109 -bfd: Set domain for filter testing
2110 -bfl: Set local part for filter testing
2111 -bfp: Set prefix for filter testing
2112 -bfs: Set suffix for filter testing
2117 filter_test |= checking = FTEST_USER;
2118 if (++i < argc) filter_test_ufile = argv[i];
2119 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2124 exim_fail("exim: string expected after %s\n", arg);
2125 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2126 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2127 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2128 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2133 /* -bh: Host checking - an IP address must follow. */
2135 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2137 if (++i >= argc) { badarg = TRUE; break; }
2138 sender_host_address = string_copy_taint(argv[i], TRUE);
2139 host_checking = checking = f.log_testing_mode = TRUE;
2140 f.host_checking_callout = *argrest == 'c';
2141 message_logs = FALSE;
2146 /* -bi: This option is used by sendmail to initialize *the* alias file,
2147 though it has the -oA option to specify a different file. Exim has no
2148 concept of *the* alias file, but since Sun's YP make script calls
2149 sendmail this way, some support must be provided. */
2151 if (!*++argrest) bi_option = TRUE;
2155 /* -bI: provide information, of the type to follow after a colon.
2156 This is an Exim flag. */
2158 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2160 uschar *p = argrest+1;
2161 info_flag = CMDINFO_HELP;
2163 if (strcmpic(p, CUS"sieve") == 0)
2165 info_flag = CMDINFO_SIEVE;
2168 else if (strcmpic(p, CUS"dscp") == 0)
2170 info_flag = CMDINFO_DSCP;
2173 else if (strcmpic(p, CUS"help") == 0)
2179 /* -bm: Accept and deliver message - the default option. Reinstate
2180 receiving_message, which got turned off for all -b options.
2181 -bmalware: test the filename given for malware */
2183 if (!*argrest) receiving_message = TRUE;
2184 else if (Ustrcmp(argrest, "alware") == 0)
2186 if (++i >= argc) { badarg = TRUE; break; }
2188 malware_test_file = argv[i];
2193 /* -bnq: For locally originating messages, do not qualify unqualified
2194 addresses. In the envelope, this causes errors; in header lines they
2197 if (Ustrcmp(argrest, "q") == 0)
2199 f.allow_unqualified_sender = FALSE;
2200 f.allow_unqualified_recipient = FALSE;
2205 /* -bpxx: List the contents of the mail queue, in various forms. If
2206 the option is -bpc, just a queue count is needed. Otherwise, if the
2207 first letter after p is r, then order is random. */
2209 if (*argrest == 'c')
2212 if (*++argrest) badarg = TRUE;
2216 if (*argrest == 'r')
2218 list_queue_option = 8;
2221 else list_queue_option = 0;
2225 /* -bp: List the contents of the mail queue, top-level only */
2229 /* -bpu: List the contents of the mail queue, top-level undelivered */
2231 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2233 /* -bpa: List the contents of the mail queue, including all delivered */
2235 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2237 /* Unknown after -bp[r] */
2243 /* -bP: List the configuration variables given as the address list.
2244 Force -v, so configuration errors get displayed. */
2247 /* -bP config: we need to setup here, because later,
2248 * when list_options is checked, the config is read already */
2251 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2254 readconf_save_config(version_string);
2258 list_options = TRUE;
2259 debug_selector |= D_v;
2260 debug_file = stderr;
2264 /* -brt: Test retry configuration lookup */
2266 if (Ustrcmp(argrest, "t") == 0)
2269 test_retry_arg = i + 1;
2273 /* -brw: Test rewrite configuration */
2275 else if (Ustrcmp(argrest, "w") == 0)
2278 test_rewrite_arg = i + 1;
2284 /* -bS: Read SMTP commands on standard input, but produce no replies -
2285 all errors are reported by sending messages. */
2288 smtp_input = smtp_batched_input = receiving_message = TRUE;
2292 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2293 on standard output. */
2295 if (!*argrest) smtp_input = receiving_message = TRUE;
2299 /* -bt: address testing mode */
2302 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2306 /* -bv: verify addresses */
2309 verify_address_mode = checking = f.log_testing_mode = TRUE;
2311 /* -bvs: verify sender addresses */
2313 else if (Ustrcmp(argrest, "s") == 0)
2315 verify_address_mode = checking = f.log_testing_mode = TRUE;
2316 verify_as_sender = TRUE;
2321 /* -bV: Print version string and support details */
2325 printf("Exim version %s #%s built %s\n", version_string,
2326 version_cnumber, version_date);
2327 printf("%s\n", CS version_copyright);
2328 version_printed = TRUE;
2329 show_whats_supported(stdout);
2330 f.log_testing_mode = TRUE;
2335 /* -bw: inetd wait mode, accept a listening socket as stdin */
2337 f.inetd_wait_mode = TRUE;
2338 f.background_daemon = FALSE;
2339 f.daemon_listen = TRUE;
2341 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2342 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2353 /* -C: change configuration file list; ignore if it isn't really
2354 a change! Enforce a prefix check if required. */
2358 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2359 if (Ustrcmp(config_main_filelist, argrest) != 0)
2361 #ifdef ALT_CONFIG_PREFIX
2363 int len = Ustrlen(ALT_CONFIG_PREFIX);
2364 const uschar *list = argrest;
2366 while((filename = string_nextinlist(&list, &sep, big_buffer,
2368 if ( ( Ustrlen(filename) < len
2369 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2370 || Ustrstr(filename, "/../") != NULL
2372 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2374 exim_fail("-C Permission denied\n");
2376 if (real_uid != root_uid)
2378 #ifdef TRUSTED_CONFIG_LIST
2380 if (real_uid != exim_uid
2381 #ifdef CONFIGURE_OWNER
2382 && real_uid != config_uid
2385 f.trusted_config = FALSE;
2388 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2391 struct stat statbuf;
2393 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2394 (statbuf.st_uid != root_uid /* owner not root */
2395 #ifdef CONFIGURE_OWNER
2396 && statbuf.st_uid != config_uid /* owner not the special one */
2399 (statbuf.st_gid != root_gid /* group not root */
2400 #ifdef CONFIGURE_GROUP
2401 && statbuf.st_gid != config_gid /* group not the special one */
2403 && (statbuf.st_mode & 020) != 0 /* group writeable */
2405 (statbuf.st_mode & 2) != 0) /* world writeable */
2407 f.trusted_config = FALSE;
2412 /* Well, the trust list at least is up to scratch... */
2414 uschar *trusted_configs[32];
2417 int old_pool = store_pool;
2418 store_pool = POOL_MAIN;
2420 reset_point = store_mark();
2421 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2423 uschar *start = big_buffer, *nl;
2424 while (*start && isspace(*start))
2428 nl = Ustrchr(start, '\n');
2431 trusted_configs[nr_configs++] = string_copy(start);
2432 if (nr_configs == nelem(trusted_configs))
2440 const uschar *list = argrest;
2442 while (f.trusted_config && (filename = string_nextinlist(&list,
2443 &sep, big_buffer, big_buffer_size)))
2445 for (i=0; i < nr_configs; i++)
2446 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2448 if (i == nr_configs)
2450 f.trusted_config = FALSE;
2455 else /* No valid prefixes found in trust_list file. */
2456 f.trusted_config = FALSE;
2457 store_reset(reset_point);
2458 store_pool = old_pool;
2461 else /* Could not open trust_list file. */
2462 f.trusted_config = FALSE;
2465 /* Not root; don't trust config */
2466 f.trusted_config = FALSE;
2470 config_main_filelist = argrest;
2471 f.config_changed = TRUE;
2476 /* -D: set up a macro definition */
2479 #ifdef DISABLE_D_OPTION
2480 exim_fail("exim: -D is not available in this Exim binary\n");
2486 uschar *s = argrest;
2489 while (isspace(*s)) s++;
2491 if (*s < 'A' || *s > 'Z')
2492 exim_fail("exim: macro name set by -D must start with "
2493 "an upper case letter\n");
2495 while (isalnum(*s) || *s == '_')
2497 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2501 if (ptr == 0) { badarg = TRUE; break; }
2502 while (isspace(*s)) s++;
2505 if (*s++ != '=') { badarg = TRUE; break; }
2506 while (isspace(*s)) s++;
2509 for (m = macros_user; m; m = m->next)
2510 if (Ustrcmp(m->name, name) == 0)
2511 exim_fail("exim: duplicated -D in command line\n");
2513 m = macro_create(name, s, TRUE);
2515 if (clmacro_count >= MAX_CLMACROS)
2516 exim_fail("exim: too many -D options on command line\n");
2517 clmacros[clmacro_count++] =
2518 string_sprintf("-D%s=%s", m->name, m->replacement);
2523 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2524 The latter is now a no-op, retained for compatibility only. If -dd is used,
2525 debugging subprocesses of the daemon is disabled. */
2528 if (Ustrcmp(argrest, "ropcr") == 0)
2530 /* drop_cr = TRUE; */
2533 /* Use an intermediate variable so that we don't set debugging while
2534 decoding the debugging bits. */
2538 unsigned int selector = D_default;
2541 if (*argrest == 'd')
2543 f.debug_daemon = TRUE;
2547 decode_bits(&selector, 1, debug_notall, argrest,
2548 debug_options, debug_options_count, US"debug", 0);
2549 debug_selector = selector;
2554 /* -E: This is a local error message. This option is not intended for
2555 external use at all, but is not restricted to trusted callers because it
2556 does no harm (just suppresses certain error messages) and if Exim is run
2557 not setuid root it won't always be trusted when it generates error
2558 messages using this option. If there is a message id following -E, point
2559 message_reference at it, for logging. */
2562 f.local_error_message = TRUE;
2563 if (mac_ismsgid(argrest)) message_reference = argrest;
2567 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2568 option, so it looks as if historically the -oex options are also callable
2569 without the leading -o. So we have to accept them. Before the switch,
2570 anything starting -oe has been converted to -e. Exim does not support all
2571 of the sendmail error options. */
2574 if (Ustrcmp(argrest, "e") == 0)
2576 arg_error_handling = ERRORS_SENDER;
2577 errors_sender_rc = EXIT_SUCCESS;
2579 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2580 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2581 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2582 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2587 /* -F: Set sender's full name, used instead of the gecos entry from
2588 the password file. Since users can usually alter their gecos entries,
2589 there's no security involved in using this instead. The data can follow
2590 the -F or be in the next argument. */
2594 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2595 originator_name = string_copy_taint(argrest, TRUE);
2596 f.sender_name_forced = TRUE;
2600 /* -f: Set sender's address - this value is only actually used if Exim is
2601 run by a trusted user, or if untrusted_set_sender is set and matches the
2602 address, except that the null address can always be set by any user. The
2603 test for this happens later, when the value given here is ignored when not
2604 permitted. For an untrusted user, the actual sender is still put in Sender:
2605 if it doesn't match the From: header (unless no_local_from_check is set).
2606 The data can follow the -f or be in the next argument. The -r switch is an
2607 obsolete form of -f but since there appear to be programs out there that
2608 use anything that sendmail has ever supported, better accept it - the
2609 synonymizing is done before the switch above.
2611 At this stage, we must allow domain literal addresses, because we don't
2612 know what the setting of allow_domain_literals is yet. Ditto for trailing
2613 dots and strip_trailing_dot. */
2617 int dummy_start, dummy_end;
2620 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2622 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2625 uschar * temp = argrest + Ustrlen(argrest) - 1;
2626 while (temp >= argrest && isspace(*temp)) temp--;
2627 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2628 allow_domain_literals = TRUE;
2629 strip_trailing_dot = TRUE;
2631 allow_utf8_domains = TRUE;
2633 if (!(sender_address = parse_extract_address(argrest, &errmess,
2634 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2635 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2637 sender_address = string_copy_taint(sender_address, TRUE);
2639 message_smtputf8 = string_is_utf8(sender_address);
2640 allow_utf8_domains = FALSE;
2642 allow_domain_literals = FALSE;
2643 strip_trailing_dot = FALSE;
2645 f.sender_address_forced = TRUE;
2649 /* -G: sendmail invocation to specify that it's a gateway submission and
2650 sendmail may complain about problems instead of fixing them.
2651 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2652 not at this time complain about problems. */
2658 /* -h: Set the hop count for an incoming message. Exim does not currently
2659 support this; it always computes it by counting the Received: headers.
2660 To put it in will require a change to the spool header file format. */
2664 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2665 if (!isdigit(*argrest)) badarg = TRUE;
2669 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2670 not to be documented for sendmail but mailx (at least) uses it) */
2673 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2677 /* -L: set the identifier used for syslog; equivalent to setting
2678 syslog_processname in the config file, but needs to be an admin option. */
2682 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2683 if ((sz = Ustrlen(argrest)) > 32)
2684 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2686 exim_fail("exim: the -L syslog name is too short\n");
2687 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2691 receiving_message = FALSE;
2693 /* -MC: continue delivery of another message via an existing open
2694 file descriptor. This option is used for an internal call by the
2695 smtp transport when there is a pending message waiting to go to an
2696 address to which it has got a connection. Five subsequent arguments are
2697 required: transport name, host name, IP address, sequence number, and
2698 message_id. Transports may decline to create new processes if the sequence
2699 number gets too big. The channel is stdin. This (-MC) must be the last
2700 argument. There's a subsequent check that the real-uid is privileged.
2702 If we are running in the test harness. delay for a bit, to let the process
2703 that set this one up complete. This makes for repeatability of the logging,
2706 if (Ustrcmp(argrest, "C") == 0)
2708 union sockaddr_46 interface_sock;
2709 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2712 exim_fail("exim: too many or too few arguments after -MC\n");
2714 if (msg_action_arg >= 0)
2715 exim_fail("exim: incompatible arguments\n");
2717 continue_transport = string_copy_taint(argv[++i], TRUE);
2718 continue_hostname = string_copy_taint(argv[++i], TRUE);
2719 continue_host_address = string_copy_taint(argv[++i], TRUE);
2720 continue_sequence = Uatoi(argv[++i]);
2721 msg_action = MSG_DELIVER;
2722 msg_action_arg = ++i;
2723 forced_delivery = TRUE;
2724 queue_run_pid = passed_qr_pid;
2725 queue_run_pipe = passed_qr_pipe;
2727 if (!mac_ismsgid(argv[i]))
2728 exim_fail("exim: malformed message id %s after -MC option\n",
2731 /* Set up $sending_ip_address and $sending_port, unless proxied */
2733 if (!continue_proxy_cipher)
2734 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2736 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2739 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2742 testharness_pause_ms(500);
2746 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2750 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2751 precedes -MC (see above). The flag indicates that the host to which
2752 Exim is connected has accepted an AUTH sequence. */
2754 case 'A': f.smtp_authenticated = TRUE; break;
2756 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2757 that exim is connected to supports the esmtp extension DSN */
2759 case 'D': smtp_peer_options |= OPTION_DSN; break;
2761 /* -MCd: for debug, set a process-purpose string */
2763 case 'd': if (++i < argc)
2764 process_purpose = string_copy_taint(argv[i], TRUE);
2768 /* -MCG: set the queue name, to a non-default value */
2770 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2774 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2776 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2778 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2779 it preceded -MC (see above) */
2781 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2783 /* -MCQ: pass on the pid of the queue-running process that started
2784 this chain of deliveries and the fd of its synchronizing pipe; this
2785 is useful only when it precedes -MC (see above) */
2787 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2789 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2793 /* -MCS: set the smtp_use_size flag; this is useful only when it
2794 precedes -MC (see above) */
2796 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2799 /* -MCt: similar to -MCT below but the connection is still open
2800 via a proxy process which handles the TLS context and coding.
2801 Require three arguments for the proxied local address and port,
2802 and the TLS cipher. */
2804 case 't': if (++i < argc)
2805 sending_ip_address = string_copy_taint(argv[i], TRUE);
2808 sending_port = (int)(Uatol(argv[i]));
2811 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2815 /* -MCT: set the tls_offered flag; this is useful only when it
2816 precedes -MC (see above). The flag indicates that the host to which
2817 Exim is connected has offered TLS support. */
2819 case 'T': smtp_peer_options |= OPTION_TLS; break;
2822 default: badarg = TRUE; break;
2827 /* -M[x]: various operations on the following list of message ids:
2828 -M deliver the messages, ignoring next retry times and thawing
2829 -Mc deliver the messages, checking next retry times, no thawing
2830 -Mf freeze the messages
2831 -Mg give up on the messages
2832 -Mt thaw the messages
2833 -Mrm remove the messages
2834 In the above cases, this must be the last option. There are also the
2835 following options which are followed by a single message id, and which
2836 act on that message. Some of them use the "recipient" addresses as well.
2837 -Mar add recipient(s)
2838 -Mmad mark all recipients delivered
2839 -Mmd mark recipients(s) delivered
2841 -Mset load a message for use with -be
2843 -Mvc show copy (of whole message, in RFC 2822 format)
2850 msg_action = MSG_DELIVER;
2851 forced_delivery = f.deliver_force_thaw = TRUE;
2853 else if (Ustrcmp(argrest, "ar") == 0)
2855 msg_action = MSG_ADD_RECIPIENT;
2856 one_msg_action = TRUE;
2858 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2859 else if (Ustrcmp(argrest, "es") == 0)
2861 msg_action = MSG_EDIT_SENDER;
2862 one_msg_action = TRUE;
2864 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2865 else if (Ustrcmp(argrest, "g") == 0)
2867 msg_action = MSG_DELIVER;
2868 deliver_give_up = TRUE;
2870 else if (Ustrcmp(argrest, "G") == 0)
2872 msg_action = MSG_SETQUEUE;
2873 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2875 else if (Ustrcmp(argrest, "mad") == 0)
2877 msg_action = MSG_MARK_ALL_DELIVERED;
2879 else if (Ustrcmp(argrest, "md") == 0)
2881 msg_action = MSG_MARK_DELIVERED;
2882 one_msg_action = TRUE;
2884 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2885 else if (Ustrcmp(argrest, "set") == 0)
2887 msg_action = MSG_LOAD;
2888 one_msg_action = TRUE;
2890 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2891 else if (Ustrcmp(argrest, "vb") == 0)
2893 msg_action = MSG_SHOW_BODY;
2894 one_msg_action = TRUE;
2896 else if (Ustrcmp(argrest, "vc") == 0)
2898 msg_action = MSG_SHOW_COPY;
2899 one_msg_action = TRUE;
2901 else if (Ustrcmp(argrest, "vh") == 0)
2903 msg_action = MSG_SHOW_HEADER;
2904 one_msg_action = TRUE;
2906 else if (Ustrcmp(argrest, "vl") == 0)
2908 msg_action = MSG_SHOW_LOG;
2909 one_msg_action = TRUE;
2911 else { badarg = TRUE; break; }
2913 /* All the -Mxx options require at least one message id. */
2915 msg_action_arg = i + 1;
2916 if (msg_action_arg >= argc)
2917 exim_fail("exim: no message ids given after %s option\n", arg);
2919 /* Some require only message ids to follow */
2921 if (!one_msg_action)
2923 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2924 exim_fail("exim: malformed message id %s after %s option\n",
2926 goto END_ARG; /* Remaining args are ids */
2929 /* Others require only one message id, possibly followed by addresses,
2930 which will be handled as normal arguments. */
2934 if (!mac_ismsgid(argv[msg_action_arg]))
2935 exim_fail("exim: malformed message id %s after %s option\n",
2936 argv[msg_action_arg], arg);
2942 /* Some programs seem to call the -om option without the leading o;
2943 for sendmail it askes for "me too". Exim always does this. */
2946 if (*argrest) badarg = TRUE;
2950 /* -N: don't do delivery - a debugging option that stops transports doing
2951 their thing. It implies debugging at the D_v level. */
2956 f.dont_deliver = TRUE;
2957 debug_selector |= D_v;
2958 debug_file = stderr;
2964 /* -n: This means "don't alias" in sendmail, apparently.
2965 For normal invocations, it has no effect.
2966 It may affect some other options. */
2972 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2973 option to the specified value. This form uses long names. We need to handle
2974 -O option=value and -Ooption=value. */
2979 exim_fail("exim: string expected after -O\n");
2985 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2988 if (!*(alias_arg = argrest))
2989 if (i+1 < argc) alias_arg = argv[++i];
2990 else exim_fail("exim: string expected after -oA\n");
2993 /* -oB: Set a connection message max value for remote deliveries */
2996 uschar * p = argrest;
2998 if (i+1 < argc && isdigit((argv[i+1][0])))
3002 connection_max_messages = 1;
3009 exim_fail("exim: number expected after -oB\n");
3010 connection_max_messages = Uatoi(p);
3015 /* -odb: background delivery */
3018 if (Ustrcmp(argrest, "b") == 0)
3020 f.synchronous_delivery = FALSE;
3021 arg_queue_only = FALSE;
3022 queue_only_set = TRUE;
3025 /* -odd: testsuite-only: add no inter-process delays */
3027 else if (Ustrcmp(argrest, "d") == 0)
3028 f.testsuite_delays = FALSE;
3030 /* -odf: foreground delivery (smail-compatible option); same effect as
3031 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3034 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3036 f.synchronous_delivery = TRUE;
3037 arg_queue_only = FALSE;
3038 queue_only_set = TRUE;
3041 /* -odq: queue only */
3043 else if (Ustrcmp(argrest, "q") == 0)
3045 f.synchronous_delivery = FALSE;
3046 arg_queue_only = TRUE;
3047 queue_only_set = TRUE;
3050 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3051 but no remote delivery */
3053 else if (Ustrcmp(argrest, "qs") == 0)
3055 f.queue_smtp = TRUE;
3056 arg_queue_only = FALSE;
3057 queue_only_set = TRUE;
3062 /* -oex: Sendmail error flags. As these are also accepted without the
3063 leading -o prefix, for compatibility with vacation and other callers,
3064 they are handled with -e above. */
3066 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3067 -oitrue: Another sendmail syntax for the same */
3070 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3075 /* -oM*: Set various characteristics for an incoming message; actually
3076 acted on for trusted callers only. */
3081 exim_fail("exim: data expected after -oM%s\n", argrest);
3083 /* -oMa: Set sender host address */
3085 if (Ustrcmp(argrest, "a") == 0)
3086 sender_host_address = string_copy_taint(argv[++i], TRUE);
3088 /* -oMaa: Set authenticator name */
3090 else if (Ustrcmp(argrest, "aa") == 0)
3091 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3093 /* -oMas: setting authenticated sender */
3095 else if (Ustrcmp(argrest, "as") == 0)
3096 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3098 /* -oMai: setting authenticated id */
3100 else if (Ustrcmp(argrest, "ai") == 0)
3101 authenticated_id = string_copy_taint(argv[++i], TRUE);
3103 /* -oMi: Set incoming interface address */
3105 else if (Ustrcmp(argrest, "i") == 0)
3106 interface_address = string_copy_taint(argv[++i], TRUE);
3108 /* -oMm: Message reference */
3110 else if (Ustrcmp(argrest, "m") == 0)
3112 if (!mac_ismsgid(argv[i+1]))
3113 exim_fail("-oMm must be a valid message ID\n");
3114 if (!f.trusted_config)
3115 exim_fail("-oMm must be called by a trusted user/config\n");
3116 message_reference = argv[++i];
3119 /* -oMr: Received protocol */
3121 else if (Ustrcmp(argrest, "r") == 0)
3123 if (received_protocol)
3124 exim_fail("received_protocol is set already\n");
3126 received_protocol = string_copy_taint(argv[++i], TRUE);
3128 /* -oMs: Set sender host name */
3130 else if (Ustrcmp(argrest, "s") == 0)
3131 sender_host_name = string_copy_taint(argv[++i], TRUE);
3133 /* -oMt: Set sender ident */
3135 else if (Ustrcmp(argrest, "t") == 0)
3137 sender_ident_set = TRUE;
3138 sender_ident = string_copy_taint(argv[++i], TRUE);
3141 /* Else a bad argument */
3148 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3149 seem to call this as -m (undocumented), so that is also accepted (see
3151 /* -oo: An ancient flag for old-style addresses which still seems to
3152 crop up in some calls (see in SCO). */
3156 if (*argrest) badarg = TRUE;
3159 /* -oP <name>: set pid file path for daemon
3160 -oPX: delete pid file of daemon */
3163 if (!*argrest) override_pid_file_path = argv[++i];
3164 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3169 /* -or <n>: set timeout for non-SMTP acceptance
3170 -os <n>: set timeout for SMTP acceptance */
3175 int * tp = argrest[-1] == 'r'
3176 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3178 *tp = readconf_readtime(argrest, 0, FALSE);
3179 else if (i+1 < argc)
3180 *tp = readconf_readtime(argv[++i], 0, FALSE);
3183 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3187 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3190 if (*argrest) badarg = TRUE;
3191 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3194 /* Unknown -o argument */
3202 /* -ps: force Perl startup; -pd force delayed Perl startup */
3206 if (*argrest == 's' && argrest[1] == 0)
3208 perl_start_option = 1;
3211 if (*argrest == 'd' && argrest[1] == 0)
3213 perl_start_option = -1;
3218 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3219 which sets the host protocol and host name */
3222 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3226 uschar * hn = Ustrchr(argrest, ':');
3228 if (received_protocol)
3229 exim_fail("received_protocol is set already\n");
3232 received_protocol = string_copy_taint(argrest, TRUE);
3235 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3236 sender_host_name = string_copy_taint(hn + 1, TRUE);
3243 receiving_message = FALSE;
3244 if (queue_interval >= 0)
3245 exim_fail("exim: -q specified more than once\n");
3247 /* -qq...: Do queue runs in a 2-stage manner */
3249 if (*argrest == 'q')
3251 f.queue_2stage = TRUE;
3255 /* -qi...: Do only first (initial) deliveries */
3257 if (*argrest == 'i')
3259 f.queue_run_first_delivery = TRUE;
3263 /* -qf...: Run the queue, forcing deliveries
3264 -qff..: Ditto, forcing thawing as well */
3266 if (*argrest == 'f')
3268 f.queue_run_force = TRUE;
3269 if (*++argrest == 'f')
3271 f.deliver_force_thaw = TRUE;
3276 /* -q[f][f]l...: Run the queue only on local deliveries */
3278 if (*argrest == 'l')
3280 f.queue_run_local = TRUE;
3284 /* -q[f][f][l][G<name>]... Work on the named queue */
3286 if (*argrest == 'G')
3289 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3290 queue_name = string_copyn(argrest, i);
3292 if (*argrest == '/') argrest++;
3295 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3296 only, optionally named, optionally starting from a given message id. */
3298 if (!(list_queue || count_queue))
3300 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3303 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3304 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3305 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3306 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3309 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3310 forced, optionally local only, optionally named. */
3312 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3314 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3318 case 'R': /* Synonymous with -qR... */
3319 receiving_message = FALSE;
3321 /* -Rf: As -R (below) but force all deliveries,
3322 -Rff: Ditto, but also thaw all frozen messages,
3323 -Rr: String is regex
3324 -Rrf: Regex and force
3325 -Rrff: Regex and force and thaw
3327 in all cases provided there are no further characters in this
3331 for (int i = 0; i < nelem(rsopts); i++)
3332 if (Ustrcmp(argrest, rsopts[i]) == 0)
3334 if (i != 2) f.queue_run_force = TRUE;
3335 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3336 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3337 argrest += Ustrlen(rsopts[i]);
3340 /* -R: Set string to match in addresses for forced queue run to
3341 pick out particular messages. */
3344 deliver_selectstring = string_copy_taint(argrest, TRUE);
3345 else if (i+1 < argc)
3346 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3348 exim_fail("exim: string expected after -R\n");
3352 /* -r: an obsolete synonym for -f (see above) */
3355 /* -S: Like -R but works on sender. */
3357 case 'S': /* Synonymous with -qS... */
3358 receiving_message = FALSE;
3360 /* -Sf: As -S (below) but force all deliveries,
3361 -Sff: Ditto, but also thaw all frozen messages,
3362 -Sr: String is regex
3363 -Srf: Regex and force
3364 -Srff: Regex and force and thaw
3366 in all cases provided there are no further characters in this
3370 for (int i = 0; i < nelem(rsopts); i++)
3371 if (Ustrcmp(argrest, rsopts[i]) == 0)
3373 if (i != 2) f.queue_run_force = TRUE;
3374 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3375 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3376 argrest += Ustrlen(rsopts[i]);
3379 /* -S: Set string to match in addresses for forced queue run to
3380 pick out particular messages. */
3383 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3384 else if (i+1 < argc)
3385 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3387 exim_fail("exim: string expected after -S\n");
3390 /* -Tqt is an option that is exclusively for use by the testing suite.
3391 It is not recognized in other circumstances. It allows for the setting up
3392 of explicit "queue times" so that various warning/retry things can be
3393 tested. Otherwise variability of clock ticks etc. cause problems. */
3396 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3397 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3402 /* -t: Set flag to extract recipients from body of message. */
3405 if (!*argrest) extract_recipients = TRUE;
3407 /* -ti: Set flag to extract recipients from body of message, and also
3408 specify that dot does not end the message. */
3410 else if (Ustrcmp(argrest, "i") == 0)
3412 extract_recipients = TRUE;
3416 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3419 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3426 /* -U: This means "initial user submission" in sendmail, apparently. The
3427 doc claims that in future sendmail may refuse syntactically invalid
3428 messages instead of fixing them. For the moment, we just ignore it. */
3434 /* -v: verify things - this is a very low-level debugging */
3439 debug_selector |= D_v;
3440 debug_file = stderr;
3446 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3448 The -x flag tells the sendmail command that mail from a local
3449 mail program has National Language Support (NLS) extended characters
3450 in the body of the mail item. The sendmail command can send mail with
3451 extended NLS characters across networks that normally corrupts these
3454 As Exim is 8-bit clean, it just ignores this flag. */
3457 if (*argrest) badarg = TRUE;
3460 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3461 logs to that file. We swallow the parameter and otherwise ignore it. */
3466 exim_fail("exim: string expected after -X\n");
3472 log_oneline = string_copy_taint(argv[i], TRUE);
3474 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3477 /* All other initial characters are errors */
3482 } /* End of high-level switch statement */
3484 /* Failed to recognize the option, or syntax error */
3487 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3488 "option %s\n", arg);
3492 /* If -R or -S have been specified without -q, assume a single queue run. */
3494 if ( (deliver_selectstring || deliver_selectstring_sender)
3495 && queue_interval < 0)
3500 store_pool = old_pool;
3503 /* If usage_wanted is set we call the usage function - which never returns */
3504 if (usage_wanted) exim_usage(called_as);
3506 /* Arguments have been processed. Check for incompatibilities. */
3508 (smtp_input || extract_recipients || recipients_arg < argc) &&
3509 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3510 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3511 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3514 msg_action_arg > 0 &&
3515 (f.daemon_listen || queue_interval > 0 || list_options ||
3516 (checking && msg_action != MSG_LOAD) ||
3517 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3520 (f.daemon_listen || queue_interval > 0) &&
3521 (sender_address != NULL || list_options || list_queue || checking ||
3525 f.daemon_listen && queue_interval == 0
3528 f.inetd_wait_mode && queue_interval >= 0
3532 (checking || smtp_input || extract_recipients ||
3533 filter_test != FTEST_NONE || bi_option)
3536 verify_address_mode &&
3537 (f.address_test_mode || smtp_input || extract_recipients ||
3538 filter_test != FTEST_NONE || bi_option)
3541 f.address_test_mode && (smtp_input || extract_recipients ||
3542 filter_test != FTEST_NONE || bi_option)
3545 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3549 deliver_selectstring != NULL && queue_interval < 0
3552 msg_action == MSG_LOAD &&
3553 (!expansion_test || expansion_test_message != NULL)
3556 exim_fail("exim: incompatible command-line options or arguments\n");
3558 /* If debugging is set up, set the file and the file descriptor to pass on to
3559 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3560 to run in the foreground. */
3562 if (debug_selector != 0)
3564 debug_file = stderr;
3565 debug_fd = fileno(debug_file);
3566 f.background_daemon = FALSE;
3567 testharness_pause_ms(100); /* lets caller finish */
3568 if (debug_selector != D_v) /* -v only doesn't show this */
3570 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3571 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3573 if (!version_printed)
3574 show_whats_supported(stderr);
3578 /* When started with root privilege, ensure that the limits on the number of
3579 open files and the number of processes (where that is accessible) are
3580 sufficiently large, or are unset, in case Exim has been called from an
3581 environment where the limits are screwed down. Not all OS have the ability to
3582 change some of these limits. */
3586 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3592 #ifdef RLIMIT_NOFILE
3593 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3595 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3597 rlp.rlim_cur = rlp.rlim_max = 0;
3600 /* I originally chose 1000 as a nice big number that was unlikely to
3601 be exceeded. It turns out that some older OS have a fixed upper limit of
3604 if (rlp.rlim_cur < 1000)
3606 rlp.rlim_cur = rlp.rlim_max = 1000;
3607 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3609 rlp.rlim_cur = rlp.rlim_max = 256;
3610 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3611 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3618 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3620 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3622 rlp.rlim_cur = rlp.rlim_max = 0;
3625 #ifdef RLIM_INFINITY
3626 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3628 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3630 if (rlp.rlim_cur < 1000)
3632 rlp.rlim_cur = rlp.rlim_max = 1000;
3634 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3635 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3641 /* Exim is normally entered as root (but some special configurations are
3642 possible that don't do this). However, it always spins off sub-processes that
3643 set their uid and gid as required for local delivery. We don't want to pass on
3644 any extra groups that root may belong to, so we want to get rid of them all at
3647 We need to obey setgroups() at this stage, before possibly giving up root
3648 privilege for a changed configuration file, but later on we might need to
3649 check on the additional groups for the admin user privilege - can't do that
3650 till after reading the config, which might specify the exim gid. Therefore,
3651 save the group list here first. */
3653 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3654 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3656 /* There is a fundamental difference in some BSD systems in the matter of
3657 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3658 known not to be different. On the "different" systems there is a single group
3659 list, and the first entry in it is the current group. On all other versions of
3660 Unix there is a supplementary group list, which is in *addition* to the current
3661 group. Consequently, to get rid of all extraneous groups on a "standard" system
3662 you pass over 0 groups to setgroups(), while on a "different" system you pass
3663 over a single group - the current group, which is always the first group in the
3664 list. Calling setgroups() with zero groups on a "different" system results in
3665 an error return. The following code should cope with both types of system.
3667 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3668 the "setgroups() with zero groups" - and changes the egid.
3669 Thanks to that we had to stash the original_egid above, for use below
3670 in the call to exim_setugid().
3672 However, if this process isn't running as root, setgroups() can't be used
3673 since you have to be root to run it, even if throwing away groups.
3674 Except, sigh, for Hurd - where you can.
3675 Not being root here happens only in some unusual configurations. */
3678 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3679 && setgroups(0, NULL) != 0
3681 && setgroups(1, group_list) != 0)
3682 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3684 /* If the configuration file name has been altered by an argument on the
3685 command line (either a new file name or a macro definition) and the caller is
3686 not root, or if this is a filter testing run, remove any setuid privilege the
3687 program has and run as the underlying user.
3689 The exim user is locked out of this, which severely restricts the use of -C
3692 Otherwise, set the real ids to the effective values (should be root unless run
3693 from inetd, which it can either be root or the exim uid, if one is configured).
3695 There is a private mechanism for bypassing some of this, in order to make it
3696 possible to test lots of configurations automatically, without having either to
3697 recompile each time, or to patch in an actual configuration file name and other
3698 values (such as the path name). If running in the test harness, pretend that
3699 configuration file changes and macro definitions haven't happened. */
3702 (!f.trusted_config || /* Config changed, or */
3703 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3704 real_uid != root_uid && /* Not root, and */
3705 !f.running_in_test_harness /* Not fudged */
3707 expansion_test /* expansion testing */
3709 filter_test != FTEST_NONE) /* Filter testing */
3711 setgroups(group_count, group_list);
3712 exim_setugid(real_uid, real_gid, FALSE,
3713 US"-C, -D, -be or -bf forces real uid");
3714 removed_privilege = TRUE;
3716 /* In the normal case when Exim is called like this, stderr is available
3717 and should be used for any logging information because attempts to write
3718 to the log will usually fail. To arrange this, we unset really_exim. However,
3719 if no stderr is available there is no point - we might as well have a go
3720 at the log (if it fails, syslog will be written).
3722 Note that if the invoker is Exim, the logs remain available. Messing with
3723 this causes unlogged successful deliveries. */
3725 if (log_stderr && real_uid != exim_uid)
3726 f.really_exim = FALSE;
3729 /* Privilege is to be retained for the moment. It may be dropped later,
3730 depending on the job that this Exim process has been asked to do. For now, set
3731 the real uid to the effective so that subsequent re-execs of Exim are done by a
3735 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3737 /* If testing a filter, open the file(s) now, before wasting time doing other
3738 setups and reading the message. */
3740 if (filter_test & FTEST_SYSTEM)
3741 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3742 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3745 if (filter_test & FTEST_USER)
3746 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3747 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3750 /* Initialise lookup_list
3751 If debugging, already called above via version reporting.
3752 In either case, we initialise the list of available lookups while running
3753 as root. All dynamically modules are loaded from a directory which is
3754 hard-coded into the binary and is code which, if not a module, would be
3755 part of Exim already. Ability to modify the content of the directory
3756 is equivalent to the ability to modify a setuid binary!
3758 This needs to happen before we read the main configuration. */
3762 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3765 /* Read the main runtime configuration data; this gives up if there
3766 is a failure. It leaves the configuration file open so that the subsequent
3767 configuration data for delivery can be read if needed.
3769 NOTE: immediately after opening the configuration file we change the working
3770 directory to "/"! Later we change to $spool_directory. We do it there, because
3771 during readconf_main() some expansion takes place already. */
3773 /* Store the initial cwd before we change directories. Can be NULL if the
3774 dir has already been unlinked. */
3775 initial_cwd = os_getcwd(NULL, 0);
3778 -be[m] expansion test -
3779 -b[fF] filter test new
3781 -bmalware malware_test_file new
3783 -brw rewrite test new
3785 -bv[s] address verify -
3787 -bP <option> (except -bP config, which sets list_config)
3789 If any of these options is set, we suppress warnings about configuration
3790 issues (currently about tls_advertise_hosts and keep_environment not being
3794 #ifdef MEASURE_TIMING
3795 struct timeval t0, diff;
3796 (void)gettimeofday(&t0, NULL);
3799 readconf_main(checking || list_options);
3801 #ifdef MEASURE_TIMING
3802 report_time_since(&t0, US"readconf_main (delta)");
3807 /* Now in directory "/" */
3809 if (cleanup_environment() == FALSE)
3810 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3813 /* If an action on specific messages is requested, or if a daemon or queue
3814 runner is being started, we need to know if Exim was called by an admin user.
3815 This is the case if the real user is root or exim, or if the real group is
3816 exim, or if one of the supplementary groups is exim or a group listed in
3817 admin_groups. We don't fail all message actions immediately if not admin_user,
3818 since some actions can be performed by non-admin users. Instead, set admin_user
3819 for later interrogation. */
3821 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3822 f.admin_user = TRUE;
3824 for (int i = 0; i < group_count && !f.admin_user; i++)
3825 if (group_list[i] == exim_gid)
3826 f.admin_user = TRUE;
3827 else if (admin_groups)
3828 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3829 if (admin_groups[j] == group_list[i])
3830 f.admin_user = TRUE;
3832 /* Another group of privileged users are the trusted users. These are root,
3833 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3834 are permitted to specify sender_addresses with -f on the command line, and
3835 other message parameters as well. */
3837 if (real_uid == root_uid || real_uid == exim_uid)
3838 f.trusted_caller = TRUE;
3842 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3843 if (trusted_users[i] == real_uid)
3844 f.trusted_caller = TRUE;
3847 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3848 if (trusted_groups[i] == real_gid)
3849 f.trusted_caller = TRUE;
3850 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3851 if (trusted_groups[i] == group_list[j])
3852 f.trusted_caller = TRUE;
3855 /* At this point, we know if the user is privileged and some command-line
3856 options become possibly impermissible, depending upon the configuration file. */
3858 if (checking && commandline_checks_require_admin && !f.admin_user)
3859 exim_fail("exim: those command-line flags are set to require admin\n");
3861 /* Handle the decoding of logging options. */
3863 decode_bits(log_selector, log_selector_size, log_notall,
3864 log_selector_string, log_options, log_options_count, US"log", 0);
3868 debug_printf("configuration file is %s\n", config_main_filename);
3869 debug_printf("log selectors =");
3870 for (int i = 0; i < log_selector_size; i++)
3871 debug_printf(" %08x", log_selector[i]);
3875 /* If domain literals are not allowed, check the sender address that was
3876 supplied with -f. Ditto for a stripped trailing dot. */
3880 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3881 exim_fail("exim: bad -f address \"%s\": domain literals not "
3882 "allowed\n", sender_address);
3883 if (f_end_dot && !strip_trailing_dot)
3884 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3885 "(trailing dot not allowed)\n", sender_address);
3888 /* See if an admin user overrode our logging. */
3890 if (cmdline_syslog_name)
3893 syslog_processname = cmdline_syslog_name;
3894 log_file_path = string_copy(CUS"syslog");
3897 /* not a panic, non-privileged users should not be able to spam paniclog */
3899 "exim: you lack sufficient privilege to specify syslog process name\n");
3901 /* Paranoia check of maximum lengths of certain strings. There is a check
3902 on the length of the log file path in log.c, which will come into effect
3903 if there are any calls to write the log earlier than this. However, if we
3904 get this far but the string is very long, it is better to stop now than to
3905 carry on and (e.g.) receive a message and then have to collapse. The call to
3906 log_write() from here will cause the ultimate panic collapse if the complete
3907 file name exceeds the buffer length. */
3909 if (Ustrlen(log_file_path) > 200)
3910 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3911 "log_file_path is longer than 200 chars: aborting");
3913 if (Ustrlen(pid_file_path) > 200)
3914 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3915 "pid_file_path is longer than 200 chars: aborting");
3917 if (Ustrlen(spool_directory) > 200)
3918 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3919 "spool_directory is longer than 200 chars: aborting");
3921 /* Length check on the process name given to syslog for its TAG field,
3922 which is only permitted to be 32 characters or less. See RFC 3164. */
3924 if (Ustrlen(syslog_processname) > 32)
3925 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3926 "syslog_processname is longer than 32 chars: aborting");
3931 log_write(0, LOG_MAIN, "%s", log_oneline);
3932 return EXIT_SUCCESS;
3935 return EXIT_FAILURE;
3937 /* In some operating systems, the environment variable TMPDIR controls where
3938 temporary files are created; Exim doesn't use these (apart from when delivering
3939 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3940 If TMPDIR is found in the environment, reset it to the value defined in the
3941 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3942 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3943 EXIM_TMPDIR by the build scripts.
3947 if (environ) for (uschar ** p = USS environ; *p; p++)
3948 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3950 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3951 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3953 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3957 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3958 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3959 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3960 called by a user who has set the TZ variable. This then affects the timestamps
3961 in log files and in Received: headers, and any created Date: header lines. The
3962 required timezone is settable in the configuration file, so nothing can be done
3963 about this earlier - but hopefully nothing will normally be logged earlier than
3964 this. We have to make a new environment if TZ is wrong, but don't bother if
3965 timestamps_utc is set, because then all times are in UTC anyway. */
3967 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3968 f.timestamps_utc = TRUE;
3971 uschar *envtz = US getenv("TZ");
3973 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3974 : timezone_string != NULL
3977 uschar **p = USS environ;
3981 if (environ) while (*p++) count++;
3982 if (!envtz) count++;
3983 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3984 if (environ) for (p = USS environ; *p; p++)
3985 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3986 if (timezone_string)
3988 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3989 sprintf(CS *newp++, "TZ=%s", timezone_string);
3994 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3995 tod_stamp(tod_log));
3999 /* Handle the case when we have removed the setuid privilege because of -C or
4000 -D. This means that the caller of Exim was not root.
4002 There is a problem if we were running as the Exim user. The sysadmin may
4003 expect this case to retain privilege because "the binary was called by the
4004 Exim user", but it hasn't, because either the -D option set macros, or the
4005 -C option set a non-trusted configuration file. There are two possibilities:
4007 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4008 to do message deliveries. Thus, the fact that it is running as a
4009 non-privileged user is plausible, and might be wanted in some special
4010 configurations. However, really_exim will have been set false when
4011 privilege was dropped, to stop Exim trying to write to its normal log
4012 files. Therefore, re-enable normal log processing, assuming the sysadmin
4013 has set up the log directory correctly.
4015 (2) If deliver_drop_privilege is not set, the configuration won't work as
4016 apparently intended, and so we log a panic message. In order to retain
4017 root for -C or -D, the caller must either be root or be invoking a
4018 trusted configuration file (when deliver_drop_privilege is false). */
4020 if ( removed_privilege
4021 && (!f.trusted_config || opt_D_used)
4022 && real_uid == exim_uid)
4023 if (deliver_drop_privilege)
4024 f.really_exim = TRUE; /* let logging work normally */
4026 log_write(0, LOG_MAIN|LOG_PANIC,
4027 "exim user lost privilege for using %s option",
4028 f.trusted_config? "-D" : "-C");
4030 /* Start up Perl interpreter if Perl support is configured and there is a
4031 perl_startup option, and the configuration or the command line specifies
4032 initializing starting. Note that the global variables are actually called
4033 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4036 if (perl_start_option != 0)
4037 opt_perl_at_start = (perl_start_option > 0);
4038 if (opt_perl_at_start && opt_perl_startup != NULL)
4041 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4042 if ((errstr = init_perl(opt_perl_startup)))
4043 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4044 opt_perl_started = TRUE;
4046 #endif /* EXIM_PERL */
4048 /* Log the arguments of the call if the configuration file said so. This is
4049 a debugging feature for finding out what arguments certain MUAs actually use.
4050 Don't attempt it if logging is disabled, or if listing variables or if
4051 verifying/testing addresses or expansions. */
4053 if ( (debug_selector & D_any || LOGGING(arguments))
4054 && f.really_exim && !list_options && !checking)
4056 uschar *p = big_buffer;
4057 Ustrcpy(p, US"cwd= (failed)");
4063 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4064 p += 4 + Ustrlen(initial_cwd);
4065 /* in case p is near the end and we don't provide enough space for
4066 * string_format to be willing to write. */
4070 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4072 for (int i = 0; i < argc; i++)
4074 int len = Ustrlen(argv[i]);
4075 const uschar *printing;
4077 if (p + len + 8 >= big_buffer + big_buffer_size)
4079 Ustrcpy(p, US" ...");
4080 log_write(0, LOG_MAIN, "%s", big_buffer);
4081 Ustrcpy(big_buffer, US"...");
4084 printing = string_printing(argv[i]);
4085 if (!*printing) quote = US"\"";
4088 const uschar *pp = printing;
4090 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4092 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4093 (p - big_buffer) - 4), printing, quote);
4096 if (LOGGING(arguments))
4097 log_write(0, LOG_MAIN, "%s", big_buffer);
4099 debug_printf("%s\n", big_buffer);
4102 /* Set the working directory to be the top-level spool directory. We don't rely
4103 on this in the code, which always uses fully qualified names, but it's useful
4104 for core dumps etc. Don't complain if it fails - the spool directory might not
4105 be generally accessible and calls with the -C option (and others) have lost
4106 privilege by now. Before the chdir, we try to ensure that the directory exists.
4109 if (Uchdir(spool_directory) != 0)
4112 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4113 dummy = /* quieten compiler */ Uchdir(spool_directory);
4114 dummy = dummy; /* yet more compiler quietening, sigh */
4117 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4118 alias file. Exim doesn't have such a concept, but this call is screwed into
4119 Sun's YP makefiles. Handle this by calling a configured script, as the real
4120 user who called Exim. The -oA option can be used to pass an argument to the
4125 (void)fclose(config_file);
4130 argv[i++] = bi_command;
4131 if (alias_arg) argv[i++] = alias_arg;
4134 setgroups(group_count, group_list);
4135 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4137 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4138 argv[1] ? argv[1] : US"");
4140 execv(CS argv[0], (char *const *)argv);
4141 exim_fail("exim: exec failed: %s\n", strerror(errno));
4145 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4150 /* We moved the admin/trusted check to be immediately after reading the
4151 configuration file. We leave these prints here to ensure that syslog setup,
4152 logfile setup, and so on has already happened. */
4154 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4155 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4157 /* Only an admin user may start the daemon or force a queue run in the default
4158 configuration, but the queue run restriction can be relaxed. Only an admin
4159 user may request that a message be returned to its sender forthwith. Only an
4160 admin user may specify a debug level greater than D_v (because it might show
4161 passwords, etc. in lookup queries). Only an admin user may request a queue
4162 count. Only an admin user can use the test interface to scan for email
4163 (because Exim will be in the spool dir and able to look at mails). */
4167 BOOL debugset = (debug_selector & ~D_v) != 0;
4168 if ( deliver_give_up || f.daemon_listen || malware_test_file
4169 || count_queue && queue_list_requires_admin
4170 || list_queue && queue_list_requires_admin
4171 || queue_interval >= 0 && prod_requires_admin
4172 || queue_name_dest && prod_requires_admin
4173 || debugset && !f.running_in_test_harness
4175 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4178 /* If the real user is not root or the exim uid, the argument for passing
4179 in an open TCP/IP connection for another message is not permitted, nor is
4180 running with the -N option for any delivery action, unless this call to exim is
4181 one that supplied an input message, or we are using a patched exim for
4182 regression testing. */
4184 if (real_uid != root_uid && real_uid != exim_uid &&
4185 (continue_hostname != NULL ||
4187 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4188 )) && !f.running_in_test_harness)
4189 exim_fail("exim: Permission denied\n");
4191 /* If the caller is not trusted, certain arguments are ignored when running for
4192 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4193 Note that authority for performing certain actions on messages is tested in the
4194 queue_action() function. */
4196 if (!f.trusted_caller && !checking)
4198 sender_host_name = sender_host_address = interface_address =
4199 sender_ident = received_protocol = NULL;
4200 sender_host_port = interface_port = 0;
4201 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4204 /* If a sender host address is set, extract the optional port number off the
4205 end of it and check its syntax. Do the same thing for the interface address.
4206 Exim exits if the syntax is bad. */
4210 if (sender_host_address != NULL)
4211 sender_host_port = check_port(sender_host_address);
4212 if (interface_address != NULL)
4213 interface_port = check_port(interface_address);
4216 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4219 if (f.trusted_caller)
4221 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4222 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4225 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4228 /* If an SMTP message is being received check to see if the standard input is a
4229 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4230 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4235 union sockaddr_46 inetd_sock;
4236 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4237 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4239 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4240 if (family == AF_INET || family == AF_INET6)
4242 union sockaddr_46 interface_sock;
4243 size = sizeof(interface_sock);
4245 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4246 interface_address = host_ntoa(-1, &interface_sock, NULL,
4249 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4251 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4254 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4255 NULL, &sender_host_port);
4256 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4257 "inetd is not supported when mua_wrapper is set");
4261 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4266 /* If the load average is going to be needed while receiving a message, get it
4267 now for those OS that require the first call to os_getloadavg() to be done as
4268 root. There will be further calls later for each message received. */
4270 #ifdef LOAD_AVG_NEEDS_ROOT
4271 if ( receiving_message
4272 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4273 load_average = OS_GETLOADAVG();
4276 /* The queue_only configuration option can be overridden by -odx on the command
4277 line, except that if queue_only_override is false, queue_only cannot be unset
4278 from the command line. */
4280 if (queue_only_set && (queue_only_override || arg_queue_only))
4281 queue_only = arg_queue_only;
4283 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4286 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4287 if (arg_smtp_receive_timeout >= 0)
4288 smtp_receive_timeout = arg_smtp_receive_timeout;
4290 /* If Exim was started with root privilege, unless we have already removed the
4291 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4292 except when starting the daemon or doing some kind of delivery or address
4293 testing (-bt). These are the only cases when root need to be retained. We run
4294 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4295 retained only for starting the daemon. We always do the initgroups() in this
4296 situation (controlled by the TRUE below), in order to be as close as possible
4297 to the state Exim usually runs in. */
4299 if (!unprivileged && /* originally had root AND */
4300 !removed_privilege && /* still got root AND */
4301 !f.daemon_listen && /* not starting the daemon */
4302 queue_interval <= 0 && /* (either kind of daemon) */
4304 deliver_drop_privilege || /* requested unprivileged */
4306 queue_interval < 0 && /* not running the queue */
4307 (msg_action_arg < 0 || /* and */
4308 msg_action != MSG_DELIVER) && /* not delivering and */
4309 (!checking || !f.address_test_mode) /* not address checking */
4311 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4313 /* When we are retaining a privileged uid, we still change to the exim gid. */
4318 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4319 rv = setgid(exim_gid);
4320 /* Impact of failure is that some stuff might end up with an incorrect group.
4321 We track this for failures from root, since any attempt to change privilege
4322 by root should succeed and failures should be examined. For non-root,
4323 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4324 no need to complain then. */
4326 if (!(unprivileged || removed_privilege))
4327 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4329 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4330 (long int)exim_gid, strerror(errno));
4333 /* Handle a request to scan a file for malware */
4334 if (malware_test_file)
4336 #ifdef WITH_CONTENT_SCAN
4338 set_process_info("scanning file for malware");
4339 result = malware_in_file(malware_test_file);
4342 printf("No malware found.\n");
4347 printf("Malware lookup returned non-okay/fail: %d\n", result);
4351 printf("Malware found: %s\n", malware_name);
4353 printf("Malware scan detected malware of unknown name.\n");
4355 printf("Malware scanning not enabled at compile time.\n");
4360 /* Handle a request to list the delivery queue */
4364 set_process_info("listing the queue");
4365 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4369 /* Handle a request to count the delivery queue */
4373 set_process_info("counting the queue");
4374 fprintf(stdout, "%u\n", queue_count());
4378 /* Handle actions on specific messages, except for the force delivery and
4379 message load actions, which are done below. Some actions take a whole list of
4380 message ids, which are known to continue up to the end of the arguments. Others
4381 take a single message id and then operate on the recipients list. */
4383 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4385 int yield = EXIT_SUCCESS;
4386 set_process_info("acting on specified messages");
4388 /* ACL definitions may be needed when removing a message (-Mrm) because
4389 event_action gets expanded */
4391 if (msg_action == MSG_REMOVE)
4394 if (!one_msg_action)
4396 for (i = msg_action_arg; i < argc; i++)
4397 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4398 yield = EXIT_FAILURE;
4401 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4402 default: printf("\n"); break;
4406 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4407 recipients_arg)) yield = EXIT_FAILURE;
4411 /* We used to set up here to skip reading the ACL section, on
4412 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4413 Now, since the intro of the ${acl } expansion, ACL definitions may be
4414 needed in transports so we lost the optimisation. */
4417 #ifdef MEASURE_TIMING
4418 struct timeval t0, diff;
4419 (void)gettimeofday(&t0, NULL);
4424 #ifdef MEASURE_TIMING
4425 report_time_since(&t0, US"readconf_rest (delta)");
4429 /* Handle the -brt option. This is for checking out retry configurations.
4430 The next three arguments are a domain name or a complete address, and
4431 optionally two error numbers. All it does is to call the function that
4432 scans the retry configuration data. */
4434 if (test_retry_arg >= 0)
4436 retry_config *yield;
4437 int basic_errno = 0;
4441 if (test_retry_arg >= argc)
4443 printf("-brt needs a domain or address argument\n");
4444 exim_exit(EXIT_FAILURE);
4446 s1 = argv[test_retry_arg++];
4449 /* If the first argument contains no @ and no . it might be a local user
4450 or it might be a single-component name. Treat as a domain. */
4452 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4454 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4455 "being \ntreated as a one-component domain, not as a local part.\n\n",
4459 /* There may be an optional second domain arg. */
4461 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4462 s2 = argv[test_retry_arg++];
4464 /* The final arg is an error name */
4466 if (test_retry_arg < argc)
4468 uschar *ss = argv[test_retry_arg];
4470 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4473 printf("%s\n", CS error);
4474 return EXIT_FAILURE;
4477 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4478 code > 100 as an error is for matching codes to the decade. Turn them into
4479 a real error code, off the decade. */
4481 if (basic_errno == ERRNO_MAIL4XX ||
4482 basic_errno == ERRNO_RCPT4XX ||
4483 basic_errno == ERRNO_DATA4XX)
4485 int code = (more_errno >> 8) & 255;
4487 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4488 else if (code > 100)
4489 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4493 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4494 printf("No retry information found\n");
4497 more_errno = yield->more_errno;
4498 printf("Retry rule: %s ", yield->pattern);
4500 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4502 printf("quota%s%s ",
4503 (more_errno > 0)? "_" : "",
4504 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4506 else if (yield->basic_errno == ECONNREFUSED)
4508 printf("refused%s%s ",
4509 (more_errno > 0)? "_" : "",
4510 (more_errno == 'M')? "MX" :
4511 (more_errno == 'A')? "A" : "");
4513 else if (yield->basic_errno == ETIMEDOUT)
4516 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4518 if (more_errno != 0) printf("_%s",
4519 (more_errno == 'M')? "MX" : "A");
4522 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4523 printf("auth_failed ");
4526 for (retry_rule * r = yield->rules; r; r = r->next)
4528 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4529 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4535 printf(",%d.", x/1000);
4549 exim_exit(EXIT_SUCCESS);
4552 /* Handle a request to list one or more configuration options */
4553 /* If -n was set, we suppress some information */
4558 set_process_info("listing variables");
4559 if (recipients_arg >= argc)
4560 fail = !readconf_print(US"all", NULL, flag_n);
4561 else for (i = recipients_arg; i < argc; i++)
4564 (Ustrcmp(argv[i], "router") == 0 ||
4565 Ustrcmp(argv[i], "transport") == 0 ||
4566 Ustrcmp(argv[i], "authenticator") == 0 ||
4567 Ustrcmp(argv[i], "macro") == 0 ||
4568 Ustrcmp(argv[i], "environment") == 0))
4570 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4574 fail = !readconf_print(argv[i], NULL, flag_n);
4576 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4581 set_process_info("listing config");
4582 exim_exit(readconf_print(US"config", NULL, flag_n)
4583 ? EXIT_SUCCESS : EXIT_FAILURE);
4587 /* Initialise subsystems as required. */
4591 /* Handle a request to deliver one or more messages that are already on the
4592 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4593 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4595 Delivery of specific messages is typically used for a small number when
4596 prodding by hand (when the option forced_delivery will be set) or when
4597 re-execing to regain root privilege. Each message delivery must happen in a
4598 separate process, so we fork a process for each one, and run them sequentially
4599 so that debugging output doesn't get intertwined, and to avoid spawning too
4600 many processes if a long list is given. However, don't fork for the last one;
4601 this saves a process in the common case when Exim is called to deliver just one
4604 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4606 if (prod_requires_admin && !f.admin_user)
4608 fprintf(stderr, "exim: Permission denied\n");
4609 exim_exit(EXIT_FAILURE);
4611 set_process_info("delivering specified messages");
4612 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4613 for (i = msg_action_arg; i < argc; i++)
4617 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4618 that runs into a later copy into the untainted global message_id[] */
4620 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4621 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4623 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4624 exim_underbar_exit(EXIT_SUCCESS);
4628 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4630 exim_exit(EXIT_FAILURE);
4634 exim_exit(EXIT_SUCCESS);
4638 /* If only a single queue run is requested, without SMTP listening, we can just
4639 turn into a queue runner, with an optional starting message id. */
4641 if (queue_interval == 0 && !f.daemon_listen)
4643 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4644 start_queue_run_id ? US" starting at " : US"",
4645 start_queue_run_id ? start_queue_run_id: US"",
4646 stop_queue_run_id ? US" stopping at " : US"",
4647 stop_queue_run_id ? stop_queue_run_id : US"");
4649 set_process_info("running the '%s' queue (single queue run)", queue_name);
4651 set_process_info("running the queue (single queue run)");
4652 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4653 exim_exit(EXIT_SUCCESS);
4657 /* Find the login name of the real user running this process. This is always
4658 needed when receiving a message, because it is written into the spool file. It
4659 may also be used to construct a from: or a sender: header, and in this case we
4660 need the user's full name as well, so save a copy of it, checked for RFC822
4661 syntax and munged if necessary, if it hasn't previously been set by the -F
4662 argument. We may try to get the passwd entry more than once, in case NIS or
4663 other delays are in evidence. Save the home directory for use in filter testing
4668 if ((pw = getpwuid(real_uid)) != NULL)
4670 originator_login = string_copy(US pw->pw_name);
4671 originator_home = string_copy(US pw->pw_dir);
4673 /* If user name has not been set by -F, set it from the passwd entry
4674 unless -f has been used to set the sender address by a trusted user. */
4676 if (!originator_name)
4678 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4680 uschar *name = US pw->pw_gecos;
4681 uschar *amp = Ustrchr(name, '&');
4684 /* Most Unix specify that a '&' character in the gecos field is
4685 replaced by a copy of the login name, and some even specify that
4686 the first character should be upper cased, so that's what we do. */
4691 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4692 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4693 buffer[loffset] = toupper(buffer[loffset]);
4697 /* If a pattern for matching the gecos field was supplied, apply
4698 it and then expand the name string. */
4700 if (gecos_pattern && gecos_name)
4703 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4705 if (regex_match_and_setup(re, name, 0, -1))
4707 uschar *new_name = expand_string(gecos_name);
4711 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4712 "gecos field \"%s\"\n", new_name, name);
4715 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4716 "\"%s\": %s\n", gecos_name, expand_string_message);
4718 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4719 "gecos field \"%s\"\n", gecos_pattern, name);
4720 store_free((void *)re);
4722 originator_name = string_copy(name);
4725 /* A trusted caller has used -f but not -F */
4727 else originator_name = US"";
4730 /* Break the retry loop */
4735 if (++i > finduser_retries) break;
4739 /* If we cannot get a user login, log the incident and give up, unless the
4740 configuration specifies something to use. When running in the test harness,
4741 any setting of unknown_login overrides the actual name. */
4743 if (originator_login == NULL || f.running_in_test_harness)
4745 if (unknown_login != NULL)
4747 originator_login = expand_string(unknown_login);
4748 if (originator_name == NULL && unknown_username != NULL)
4749 originator_name = expand_string(unknown_username);
4750 if (originator_name == NULL) originator_name = US"";
4752 if (originator_login == NULL)
4753 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4757 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4760 originator_name = string_copy(parse_fix_phrase(originator_name,
4761 Ustrlen(originator_name), big_buffer, big_buffer_size));
4763 /* If a message is created by this call of Exim, the uid/gid of its originator
4764 are those of the caller. These values are overridden if an existing message is
4765 read in from the spool. */
4767 originator_uid = real_uid;
4768 originator_gid = real_gid;
4770 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4771 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4773 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4774 returns. We leave this till here so that the originator_ fields are available
4775 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4778 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4782 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4783 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4784 "mua_wrapper is set");
4787 # ifndef DISABLE_TLS
4788 /* This also checks that the library linkage is working and we can call
4789 routines in it, so call even if tls_require_ciphers is unset */
4791 # ifdef MEASURE_TIMING
4792 struct timeval t0, diff;
4793 (void)gettimeofday(&t0, NULL);
4795 if (!tls_dropprivs_validate_require_cipher(FALSE))
4797 # ifdef MEASURE_TIMING
4798 report_time_since(&t0, US"validate_ciphers (delta)");
4806 /* If the sender ident has not been set (by a trusted caller) set it to
4807 the caller. This will get overwritten below for an inetd call. If a trusted
4808 caller has set it empty, unset it. */
4810 if (!sender_ident) sender_ident = originator_login;
4811 else if (!*sender_ident) sender_ident = NULL;
4813 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4814 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4815 originator_* variables set. */
4817 if (test_rewrite_arg >= 0)
4819 f.really_exim = FALSE;
4820 if (test_rewrite_arg >= argc)
4822 printf("-brw needs an address argument\n");
4823 exim_exit(EXIT_FAILURE);
4825 rewrite_test(argv[test_rewrite_arg]);
4826 exim_exit(EXIT_SUCCESS);
4829 /* A locally-supplied message is considered to be coming from a local user
4830 unless a trusted caller supplies a sender address with -f, or is passing in the
4831 message via SMTP (inetd invocation or otherwise). */
4833 if ( !sender_address && !smtp_input
4834 || !f.trusted_caller && filter_test == FTEST_NONE)
4836 f.sender_local = TRUE;
4838 /* A trusted caller can supply authenticated_sender and authenticated_id
4839 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4840 defaults except when host checking. */
4842 if (!authenticated_sender && !host_checking)
4843 authenticated_sender = string_sprintf("%s@%s", originator_login,
4844 qualify_domain_sender);
4845 if (!authenticated_id && !host_checking)
4846 authenticated_id = originator_login;
4849 /* Trusted callers are always permitted to specify the sender address.
4850 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4851 is specified is the empty address. However, if a trusted caller does not
4852 specify a sender address for SMTP input, we leave sender_address unset. This
4853 causes the MAIL commands to be honoured. */
4855 if ( !smtp_input && !sender_address
4856 || !receive_check_set_sender(sender_address))
4858 /* Either the caller is not permitted to set a general sender, or this is
4859 non-SMTP input and the trusted caller has not set a sender. If there is no
4860 sender, or if a sender other than <> is set, override with the originator's
4861 login (which will get qualified below), except when checking things. */
4863 if (sender_address == NULL /* No sender_address set */
4865 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4866 !checking)) /* Not running tests, including filter tests */
4868 sender_address = originator_login;
4869 f.sender_address_forced = FALSE;
4870 sender_address_domain = 0;
4874 /* Remember whether an untrusted caller set the sender address */
4876 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4878 /* Ensure that the sender address is fully qualified unless it is the empty
4879 address, which indicates an error message, or doesn't exist (root caller, smtp
4880 interface, no -f argument). */
4882 if (sender_address && *sender_address && sender_address_domain == 0)
4883 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4884 qualify_domain_sender);
4886 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4888 /* Handle a request to verify a list of addresses, or test them for delivery.
4889 This must follow the setting of the sender address, since routers can be
4890 predicated upon the sender. If no arguments are given, read addresses from
4891 stdin. Set debug_level to at least D_v to get full output for address testing.
4894 if (verify_address_mode || f.address_test_mode)
4897 int flags = vopt_qualify;
4899 if (verify_address_mode)
4901 if (!verify_as_sender) flags |= vopt_is_recipient;
4902 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4907 flags |= vopt_is_recipient;
4908 debug_selector |= D_v;
4909 debug_file = stderr;
4910 debug_fd = fileno(debug_file);
4911 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4914 if (recipients_arg < argc)
4916 while (recipients_arg < argc)
4918 /* Supplied addresses are tainted since they come from a user */
4919 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4922 BOOL finished = FALSE;
4923 uschar *ss = parse_find_address_end(s, FALSE);
4924 if (*ss == ',') *ss = 0; else finished = TRUE;
4925 test_address(s, flags, &exit_value);
4928 while (*++s == ',' || isspace(*s)) ;
4935 uschar * s = get_stdinput(NULL, NULL);
4937 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4941 exim_exit(exit_value);
4944 /* Handle expansion checking. Either expand items on the command line, or read
4945 from stdin if there aren't any. If -Mset was specified, load the message so
4946 that its variables can be used, but restrict this facility to admin users.
4947 Otherwise, if -bem was used, read a message from stdin. */
4951 dns_init(FALSE, FALSE, FALSE);
4952 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4954 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4956 exim_fail("exim: permission denied\n");
4957 message_id = argv[msg_action_arg];
4958 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4959 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4960 printf ("Failed to load message datafile %s\n", message_id);
4961 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4962 printf ("Failed to load message %s\n", message_id);
4965 /* Read a test message from a file. We fudge it up to be on stdin, saving
4966 stdin itself for later reading of expansion strings. */
4968 else if (expansion_test_message)
4970 int save_stdin = dup(0);
4971 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4973 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4976 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4977 message_ended = END_NOTENDED;
4978 read_message_body(receive_msg(extract_recipients));
4979 message_linecount += body_linecount;
4980 (void)dup2(save_stdin, 0);
4981 (void)close(save_stdin);
4982 clearerr(stdin); /* Required by Darwin */
4985 /* Only admin users may see config-file macros this way */
4987 if (!f.admin_user) macros_user = macros = mlast = NULL;
4989 /* Allow $recipients for this testing */
4991 f.enable_dollar_recipients = TRUE;
4993 /* Expand command line items */
4995 if (recipients_arg < argc)
4996 while (recipients_arg < argc)
4997 expansion_test_line(argv[recipients_arg++]);
5003 char *(*fn_readline)(const char *) = NULL;
5004 void (*fn_addhist)(const char *) = NULL;
5008 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5011 while (s = get_stdinput(fn_readline, fn_addhist))
5012 expansion_test_line(s);
5015 if (dlhandle) dlclose(dlhandle);
5019 /* The data file will be open after -Mset */
5021 if (deliver_datafile >= 0)
5023 (void)close(deliver_datafile);
5024 deliver_datafile = -1;
5027 exim_exit(EXIT_SUCCESS);
5031 /* The active host name is normally the primary host name, but it can be varied
5032 for hosts that want to play several parts at once. We need to ensure that it is
5033 set for host checking, and for receiving messages. */
5035 smtp_active_hostname = primary_hostname;
5036 if (raw_active_hostname != NULL)
5038 uschar *nah = expand_string(raw_active_hostname);
5041 if (!f.expand_string_forcedfail)
5042 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5043 "(smtp_active_hostname): %s", raw_active_hostname,
5044 expand_string_message);
5046 else if (nah[0] != 0) smtp_active_hostname = nah;
5049 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5050 given IP address so that the blocking and relay configuration can be tested.
5051 Unless a sender_ident was set by -oMt, we discard it (the default is the
5052 caller's login name). An RFC 1413 call is made only if we are running in the
5053 test harness and an incoming interface and both ports are specified, because
5054 there is no TCP/IP call to find the ident for. */
5061 if (!sender_ident_set)
5063 sender_ident = NULL;
5064 if (f.running_in_test_harness && sender_host_port
5065 && interface_address && interface_port)
5066 verify_get_ident(1223); /* note hardwired port number */
5069 /* In case the given address is a non-canonical IPv6 address, canonicalize
5070 it. The code works for both IPv4 and IPv6, as it happens. */
5072 size = host_aton(sender_host_address, x);
5073 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5074 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5076 /* Now set up for testing */
5078 host_build_sender_fullhost();
5082 f.sender_local = FALSE;
5083 f.sender_host_notsocket = TRUE;
5084 debug_file = stderr;
5085 debug_fd = fileno(debug_file);
5086 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5087 "**** but without any ident (RFC 1413) callback.\n"
5088 "**** This is not for real!\n\n",
5089 sender_host_address);
5091 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5092 if (verify_check_host(&hosts_connection_nolog) == OK)
5093 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5094 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5096 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5097 because a log line has already been written for all its failure exists
5098 (usually "connection refused: <reason>") and writing another one is
5099 unnecessary clutter. */
5101 if (smtp_start_session())
5104 for (; (reset_point = store_mark()); store_reset(reset_point))
5106 if (smtp_setup_msg() <= 0) break;
5107 if (!receive_msg(FALSE)) break;
5109 return_path = sender_address = NULL;
5110 dnslist_domain = dnslist_matched = NULL;
5111 #ifndef DISABLE_DKIM
5112 dkim_cur_signer = NULL;
5115 deliver_localpart_orig = NULL;
5116 deliver_domain_orig = NULL;
5117 callout_address = sending_ip_address = NULL;
5118 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5122 exim_exit(EXIT_SUCCESS);
5126 /* Arrange for message reception if recipients or SMTP were specified;
5127 otherwise complain unless a version print (-bV) happened or this is a filter
5128 verification test or info dump.
5129 In the former case, show the configuration file name. */
5131 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5133 if (version_printed)
5135 if (Ustrchr(config_main_filelist, ':'))
5136 printf("Configuration file search path is %s\n", config_main_filelist);
5137 printf("Configuration file is %s\n", config_main_filename);
5138 return EXIT_SUCCESS;
5141 if (info_flag != CMDINFO_NONE)
5143 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5144 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5147 if (filter_test == FTEST_NONE)
5148 exim_usage(called_as);
5152 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5153 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5154 that we are not called from inetd, because that is rejected above. The
5155 following configuration settings are forced here:
5157 (1) Synchronous delivery (-odi)
5158 (2) Errors to stderr (-oep == -oeq)
5159 (3) No parallel remote delivery
5160 (4) Unprivileged delivery
5162 We don't force overall queueing options because there are several of them;
5163 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5164 to override any SMTP queueing. */
5168 f.synchronous_delivery = TRUE;
5169 arg_error_handling = ERRORS_STDERR;
5170 remote_max_parallel = 1;
5171 deliver_drop_privilege = TRUE;
5172 f.queue_smtp = FALSE;
5173 queue_smtp_domains = NULL;
5175 message_utf8_downconvert = -1; /* convert-if-needed */
5180 /* Prepare to accept one or more new messages on the standard input. When a
5181 message has been read, its id is returned in message_id[]. If doing immediate
5182 delivery, we fork a delivery process for each received message, except for the
5183 last one, where we can save a process switch.
5185 It is only in non-smtp mode that error_handling is allowed to be changed from
5186 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5187 sendmail error modes other than -oem ever actually used? Later: yes.) */
5189 if (!smtp_input) error_handling = arg_error_handling;
5191 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5192 logging being sent down the socket and make an identd call to get the
5195 else if (f.is_inetd)
5197 (void)fclose(stderr);
5198 exim_nullstd(); /* Re-open to /dev/null */
5199 verify_get_ident(IDENT_PORT);
5200 host_build_sender_fullhost();
5201 set_process_info("handling incoming connection from %s via inetd",
5205 /* If the sender host address has been set, build sender_fullhost if it hasn't
5206 already been done (which it will have been for inetd). This caters for the
5207 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5208 so that the test for IP options is skipped for -bs input. */
5210 if (sender_host_address && !sender_fullhost)
5212 host_build_sender_fullhost();
5213 set_process_info("handling incoming connection from %s via -oMa",
5215 f.sender_host_notsocket = TRUE;
5218 /* Otherwise, set the sender host as unknown except for inetd calls. This
5219 prevents host checking in the case of -bs not from inetd and also for -bS. */
5221 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5223 /* If stdout does not exist, then dup stdin to stdout. This can happen
5224 if exim is started from inetd. In this case fd 0 will be set to the socket,
5225 but fd 1 will not be set. This also happens for passed SMTP channels. */
5227 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5229 /* Set up the incoming protocol name and the state of the program. Root is
5230 allowed to force received protocol via the -oMr option above. If we have come
5231 via inetd, the process info has already been set up. We don't set
5232 received_protocol here for smtp input, as it varies according to
5233 batch/HELO/EHLO/AUTH/TLS. */
5237 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5238 smtp_batched_input? "batched " : "",
5239 (sender_address!= NULL)? sender_address : originator_login);
5243 int old_pool = store_pool;
5244 store_pool = POOL_PERM;
5245 if (!received_protocol)
5246 received_protocol = string_sprintf("local%s", called_as);
5247 store_pool = old_pool;
5248 set_process_info("accepting a local non-SMTP message from <%s>",
5252 /* Initialize the session_local_queue-only flag (this will be ignored if
5253 mua_wrapper is set) */
5256 session_local_queue_only = queue_only;
5258 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5259 the spool if so configured. On failure, we must not attempt to send an error
5260 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5261 error code is given.) */
5263 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5264 exim_fail("exim: insufficient disk space\n");
5266 /* If this is smtp input of any kind, real or batched, handle the start of the
5269 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5270 because a log line has already been written for all its failure exists
5271 (usually "connection refused: <reason>") and writing another one is
5272 unnecessary clutter. */
5278 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5279 if (verify_check_host(&hosts_connection_nolog) == OK)
5280 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5281 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5282 if (!smtp_start_session())
5285 exim_exit(EXIT_SUCCESS);
5289 /* Otherwise, set up the input size limit here. */
5293 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5294 if (expand_string_message)
5295 if (thismessage_size_limit == -1)
5296 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5297 "message_size_limit: %s", expand_string_message);
5299 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5300 "message_size_limit: %s", expand_string_message);
5303 /* Loop for several messages when reading SMTP input. If we fork any child
5304 processes, we don't want to wait for them unless synchronous delivery is
5305 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5306 same as SIG_DFL, despite the fact that documentation often lists the default as
5307 "ignore". This is a confusing area. This is what I know:
5309 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5310 processes that complete simply to go away without ever becoming defunct. You
5311 can't then wait for them - but we don't want to wait for them in the
5312 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5313 happen for all OS (e.g. *BSD is different).
5315 But that's not the end of the story. Some (many? all?) systems have the
5316 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5317 has by default, so it seems that the difference is merely one of default
5318 (compare restarting vs non-restarting signals).
5320 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5321 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5322 of the loop below. Paranoia rules.
5324 February 2003: That's *still* not the end of the story. There are now versions
5325 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5326 process then calls waitpid(), a grumble is written to the system log, because
5327 this is logically inconsistent. In other words, it doesn't like the paranoia.
5328 As a consequence of this, the waitpid() below is now excluded if we are sure
5329 that SIG_IGN works. */
5331 if (!f.synchronous_delivery)
5334 struct sigaction act;
5335 act.sa_handler = SIG_IGN;
5336 sigemptyset(&(act.sa_mask));
5337 act.sa_flags = SA_NOCLDWAIT;
5338 sigaction(SIGCHLD, &act, NULL);
5340 signal(SIGCHLD, SIG_IGN);
5344 /* Save the current store pool point, for resetting at the start of
5345 each message, and save the real sender address, if any. */
5347 real_sender_address = sender_address;
5349 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5350 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5355 rmark reset_point = store_mark();
5358 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5359 input and build the recipients list, before calling receive_msg() to read the
5360 message proper. Whatever sender address is given in the SMTP transaction is
5361 often ignored for local senders - we use the actual sender, which is normally
5362 either the underlying user running this process or a -f argument provided by
5363 a trusted caller. It is saved in real_sender_address. The test for whether to
5364 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5369 if ((rc = smtp_setup_msg()) > 0)
5371 if (real_sender_address != NULL &&
5372 !receive_check_set_sender(sender_address))
5374 sender_address = raw_sender = real_sender_address;
5375 sender_address_unrewritten = NULL;
5378 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5379 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5380 the very end. The result of the ACL is ignored (as for other non-SMTP
5381 messages). It is run for its potential side effects. */
5383 if (smtp_batched_input && acl_not_smtp_start != NULL)
5385 uschar *user_msg, *log_msg;
5386 f.enable_dollar_recipients = TRUE;
5387 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5388 &user_msg, &log_msg);
5389 f.enable_dollar_recipients = FALSE;
5392 /* Now get the data for the message */
5394 more = receive_msg(extract_recipients);
5395 if (message_id[0] == 0)
5397 cancel_cutthrough_connection(TRUE, US"receive dropped");
5398 if (more) goto moreloop;
5399 smtp_log_no_mail(); /* Log no mail if configured */
5400 exim_exit(EXIT_FAILURE);
5405 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5406 smtp_log_no_mail(); /* Log no mail if configured */
5407 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5411 /* In the non-SMTP case, we have all the information from the command
5412 line, but must process it in case it is in the more general RFC822
5413 format, and in any case, to detect syntax errors. Also, it appears that
5414 the use of comma-separated lists as single arguments is common, so we
5415 had better support them. */
5420 int count = argc - recipients_arg;
5421 uschar **list = argv + recipients_arg;
5423 /* These options cannot be changed dynamically for non-SMTP messages */
5425 f.active_local_sender_retain = local_sender_retain;
5426 f.active_local_from_check = local_from_check;
5428 /* Save before any rewriting */
5430 raw_sender = string_copy(sender_address);
5432 /* Loop for each argument (supplied by user hence tainted) */
5434 for (int i = 0; i < count; i++)
5436 int start, end, domain;
5438 uschar * s = string_copy_taint(list[i], TRUE);
5440 /* Loop for each comma-separated address */
5444 BOOL finished = FALSE;
5446 uschar *ss = parse_find_address_end(s, FALSE);
5448 if (*ss == ',') *ss = 0; else finished = TRUE;
5450 /* Check max recipients - if -t was used, these aren't recipients */
5452 if (recipients_max > 0 && ++rcount > recipients_max &&
5453 !extract_recipients)
5454 if (error_handling == ERRORS_STDERR)
5456 fprintf(stderr, "exim: too many recipients\n");
5457 exim_exit(EXIT_FAILURE);
5461 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5462 errors_sender_rc : EXIT_FAILURE;
5466 BOOL b = allow_utf8_domains;
5467 allow_utf8_domains = TRUE;
5470 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5473 if (string_is_utf8(recipient))
5474 message_smtputf8 = TRUE;
5476 allow_utf8_domains = b;
5479 if (domain == 0 && !f.allow_unqualified_recipient)
5482 errmess = US"unqualified recipient address not allowed";
5486 if (error_handling == ERRORS_STDERR)
5488 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5489 string_printing(list[i]), errmess);
5490 exim_exit(EXIT_FAILURE);
5496 eblock.text1 = string_printing(list[i]);
5497 eblock.text2 = errmess;
5499 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5500 errors_sender_rc : EXIT_FAILURE;
5503 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5506 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5510 /* Show the recipients when debugging */
5514 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5515 if (recipients_list)
5517 debug_printf("Recipients:\n");
5518 for (int i = 0; i < recipients_count; i++)
5519 debug_printf(" %s\n", recipients_list[i].address);
5523 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5524 ignored; rejecting here would just add complication, and it can just as
5525 well be done later. Allow $recipients to be visible in the ACL. */
5527 if (acl_not_smtp_start)
5529 uschar *user_msg, *log_msg;
5530 f.enable_dollar_recipients = TRUE;
5531 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5532 &user_msg, &log_msg);
5533 f.enable_dollar_recipients = FALSE;
5536 /* Pause for a while waiting for input. If none received in that time,
5537 close the logfile, if we had one open; then if we wait for a long-running
5538 datasource (months, in one use-case) log rotation will not leave us holding
5541 if (!receive_timeout)
5543 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5546 FD_ZERO(&r); FD_SET(0, &r);
5547 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5550 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5551 will just read the headers for the message, and not write anything onto the
5554 message_ended = END_NOTENDED;
5555 more = receive_msg(extract_recipients);
5557 /* more is always FALSE here (not SMTP message) when reading a message
5558 for real; when reading the headers of a message for filter testing,
5559 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5561 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5562 } /* Non-SMTP message reception */
5564 /* If this is a filter testing run, there are headers in store, but
5565 no message on the spool. Run the filtering code in testing mode, setting
5566 the domain to the qualify domain and the local part to the current user,
5567 unless they have been set by options. The prefix and suffix are left unset
5568 unless specified. The the return path is set to to the sender unless it has
5569 already been set from a return-path header in the message. */
5571 if (filter_test != FTEST_NONE)
5573 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5574 deliver_domain_orig = deliver_domain;
5575 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5576 deliver_localpart_orig = deliver_localpart;
5577 deliver_localpart_prefix = ftest_prefix;
5578 deliver_localpart_suffix = ftest_suffix;
5579 deliver_home = originator_home;
5583 printf("Return-path copied from sender\n");
5584 return_path = string_copy(sender_address);
5587 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5588 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5590 receive_add_recipient(
5591 string_sprintf("%s%s%s@%s",
5592 ftest_prefix ? ftest_prefix : US"",
5594 ftest_suffix ? ftest_suffix : US"",
5595 deliver_domain), -1);
5597 printf("Recipient = %s\n", recipients_list[0].address);
5598 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5599 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5601 if (chdir("/")) /* Get away from wherever the user is running this from */
5603 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5604 exim_exit(EXIT_FAILURE);
5607 /* Now we run either a system filter test, or a user filter test, or both.
5608 In the latter case, headers added by the system filter will persist and be
5609 available to the user filter. We need to copy the filter variables
5612 if (filter_test & FTEST_SYSTEM)
5613 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5614 exim_exit(EXIT_FAILURE);
5616 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5618 if (filter_test & FTEST_USER)
5619 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5620 exim_exit(EXIT_FAILURE);
5622 exim_exit(EXIT_SUCCESS);
5625 /* Else act on the result of message reception. We should not get here unless
5626 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5627 will be TRUE. If it is not, check on the number of messages received in this
5630 if ( !session_local_queue_only
5631 && smtp_accept_queue_per_connection > 0
5632 && receive_messagecount > smtp_accept_queue_per_connection)
5634 session_local_queue_only = TRUE;
5635 queue_only_reason = 2;
5638 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5639 and queue_only_load is set, check that the load average is below it. If it is
5640 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5641 default), we put the whole session into queue_only mode. It then remains this
5642 way for any subsequent messages on the same SMTP connection. This is a
5643 deliberate choice; even though the load average may fall, it doesn't seem
5644 right to deliver later messages on the same call when not delivering earlier
5645 ones. However, there are odd cases where this is not wanted, so this can be
5646 changed by setting queue_only_load_latch false. */
5648 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5649 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5651 queue_only_reason = 3;
5652 if (queue_only_load_latch) session_local_queue_only = TRUE;
5655 /* If running as an MUA wrapper, all queueing options and freezing options
5659 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5661 /* Log the queueing here, when it will get a message id attached, but
5662 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5665 if (local_queue_only)
5667 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5668 switch(queue_only_reason)
5671 log_write(L_delay_delivery,
5672 LOG_MAIN, "no immediate delivery: more than %d messages "
5673 "received in one connection", smtp_accept_queue_per_connection);
5677 log_write(L_delay_delivery,
5678 LOG_MAIN, "no immediate delivery: load average %.2f",
5679 (double)load_average/1000.0);
5684 else if (f.queue_only_policy || f.deliver_freeze)
5685 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5687 /* Else do the delivery unless the ACL or local_scan() called for queue only
5688 or froze the message. Always deliver in a separate process. A fork failure is
5689 not a disaster, as the delivery will eventually happen on a subsequent queue
5690 run. The search cache must be tidied before the fork, as the parent will
5691 do it before exiting. The child will trigger a lookup failure and
5692 thereby defer the delivery if it tries to use (for example) a cached ldap
5693 connection that the parent has called unbind on. */
5700 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5703 close_unwanted(); /* Close unwanted file descriptors and TLS */
5704 exim_nullstd(); /* Ensure std{in,out,err} exist */
5706 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5707 mode, deliver_drop_privilege is forced TRUE). */
5709 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5711 delivery_re_exec(CEE_EXEC_EXIT);
5712 /* Control does not return here. */
5715 /* No need to re-exec */
5717 rc = deliver_message(message_id, FALSE, FALSE);
5719 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5720 ? EXIT_SUCCESS : EXIT_FAILURE);
5725 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5726 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5727 "process: %s", strerror(errno));
5731 release_cutthrough_connection(US"msg passed for delivery");
5733 /* In the parent, wait if synchronous delivery is required. This will
5734 always be the case in MUA wrapper mode. */
5736 if (f.synchronous_delivery)
5739 while (wait(&status) != pid);
5740 if ((status & 0x00ff) != 0)
5741 log_write(0, LOG_MAIN|LOG_PANIC,
5742 "process %d crashed with signal %d while delivering %s",
5743 (int)pid, status & 0x00ff, message_id);
5744 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5749 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5750 automatically reaps children (see comments above the loop), clear away any
5751 finished subprocesses here, in case there are lots of messages coming in
5752 from the same source. */
5754 #ifndef SIG_IGN_WORKS
5755 while (waitpid(-1, NULL, WNOHANG) > 0);
5759 return_path = sender_address = NULL;
5760 authenticated_sender = NULL;
5761 deliver_localpart_orig = NULL;
5762 deliver_domain_orig = NULL;
5763 deliver_host = deliver_host_address = NULL;
5764 dnslist_domain = dnslist_matched = NULL;
5765 #ifdef WITH_CONTENT_SCAN
5766 malware_name = NULL;
5768 callout_address = NULL;
5769 sending_ip_address = NULL;
5771 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5773 store_reset(reset_point);
5776 exim_exit(EXIT_SUCCESS); /* Never returns */
5777 return 0; /* To stop compiler warning */