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) {}
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)
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 # ifdef CLOCK_BOOTTIME
387 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
389 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
392 /* Amount EXIM_CLOCK is behind realtime, at startup. */
393 static struct timespec offset_ts;
396 exim_clock_init(void)
399 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
400 (void)gettimeofday(&tv, NULL);
401 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
402 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
403 if (offset_ts.tv_nsec >= 0) return;
405 offset_ts.tv_nsec += 1000*1000*1000;
411 exim_gettime(struct timeval * tv)
413 #ifdef _POSIX_MONOTONIC_CLOCK
414 struct timespec now_ts;
416 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
418 now_ts.tv_sec += offset_ts.tv_sec;
419 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
422 now_ts.tv_nsec -= 1000*1000*1000;
424 tv->tv_sec = now_ts.tv_sec;
425 tv->tv_usec = now_ts.tv_nsec / 1000;
429 (void)gettimeofday(tv, NULL);
433 /* Exim uses a time + a pid to generate a unique identifier in two places: its
434 message IDs, and in file names for maildir deliveries. Because some OS now
435 re-use pids within the same second, sub-second times are now being used.
436 However, for absolute certainty, we must ensure the clock has ticked before
437 allowing the relevant process to complete. At the time of implementation of
438 this code (February 2003), the speed of processors is such that the clock will
439 invariably have ticked already by the time a process has done its job. This
440 function prepares for the time when things are faster - and it also copes with
441 clocks that go backwards.
444 tgt_tv A timeval which was used to create uniqueness; its usec field
445 has been rounded down to the value of the resolution.
446 We want to be sure the current time is greater than this.
447 resolution The resolution that was used to divide the microseconds
448 (1 for maildir, larger for message ids)
454 exim_wait_tick(struct timeval * tgt_tv, int resolution)
456 struct timeval now_tv;
457 long int now_true_usec;
459 exim_gettime(&now_tv);
460 now_true_usec = now_tv.tv_usec;
461 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
463 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
465 struct itimerval itval;
466 itval.it_interval.tv_sec = 0;
467 itval.it_interval.tv_usec = 0;
468 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
469 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
471 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
472 negative value for the microseconds is possible only in the case when "now"
473 is more than a second less than "tgt". That means that itval.it_value.tv_sec
474 is greater than zero. The following correction is therefore safe. */
476 if (itval.it_value.tv_usec < 0)
478 itval.it_value.tv_usec += 1000000;
479 itval.it_value.tv_sec -= 1;
482 DEBUG(D_transport|D_receive)
484 if (!f.running_in_test_harness)
486 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
487 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
488 now_tv.tv_sec, (long) now_tv.tv_usec);
489 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
490 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
496 /* Be prapared to go around if the kernel does not implement subtick
497 granularity (GNU Hurd) */
499 (void)gettimeofday(&now_tv, NULL);
500 now_true_usec = now_tv.tv_usec;
501 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
508 /*************************************************
509 * Call fopen() with umask 777 and adjust mode *
510 *************************************************/
512 /* Exim runs with umask(0) so that files created with open() have the mode that
513 is specified in the open() call. However, there are some files, typically in
514 the spool directory, that are created with fopen(). They end up world-writeable
515 if no precautions are taken. Although the spool directory is not accessible to
516 the world, this is an untidiness. So this is a wrapper function for fopen()
517 that sorts out the mode of the created file.
520 filename the file name
521 options the fopen() options
522 mode the required mode
524 Returns: the fopened FILE or NULL
528 modefopen(const uschar *filename, const char *options, mode_t mode)
530 mode_t saved_umask = umask(0777);
531 FILE *f = Ufopen(filename, options);
532 (void)umask(saved_umask);
533 if (f != NULL) (void)fchmod(fileno(f), mode);
538 /*************************************************
539 * Ensure stdin, stdout, and stderr exist *
540 *************************************************/
542 /* Some operating systems grumble if an exec() happens without a standard
543 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
544 file will be opened and will use these fd values, and then some other bit of
545 code will assume, for example, that it can write error messages to stderr.
546 This function ensures that fds 0, 1, and 2 are open if they do not already
547 exist, by connecting them to /dev/null.
549 This function is also used to ensure that std{in,out,err} exist at all times,
550 so that if any library that Exim calls tries to use them, it doesn't crash.
561 for (int i = 0; i <= 2; i++)
563 if (fstat(i, &statbuf) < 0 && errno == EBADF)
565 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
566 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
567 string_open_failed("/dev/null", NULL));
568 if (devnull != i) (void)dup2(devnull, i);
571 if (devnull > 2) (void)close(devnull);
577 /*************************************************
578 * Close unwanted file descriptors for delivery *
579 *************************************************/
581 /* This function is called from a new process that has been forked to deliver
582 an incoming message, either directly, or using exec.
584 We want any smtp input streams to be closed in this new process. However, it
585 has been observed that using fclose() here causes trouble. When reading in -bS
586 input, duplicate copies of messages have been seen. The files will be sharing a
587 file pointer with the parent process, and it seems that fclose() (at least on
588 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
589 least sometimes. Hence we go for closing the underlying file descriptors.
591 If TLS is active, we want to shut down the TLS library, but without molesting
592 the parent's SSL connection.
594 For delivery of a non-SMTP message, we want to close stdin and stdout (and
595 stderr unless debugging) because the calling process might have set them up as
596 pipes and be waiting for them to close before it waits for the submission
597 process to terminate. If they aren't closed, they hold up the calling process
598 until the initial delivery process finishes, which is not what we want.
600 Exception: We do want it for synchronous delivery!
602 And notwithstanding all the above, if D_resolver is set, implying resolver
603 debugging, leave stdout open, because that's where the resolver writes its
606 When we close stderr (which implies we've also closed stdout), we also get rid
607 of any controlling terminal.
619 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
621 (void)close(fileno(smtp_in));
622 (void)close(fileno(smtp_out));
627 (void)close(0); /* stdin */
628 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
629 if (debug_selector == 0) /* stderr */
631 if (!f.synchronous_delivery)
644 /*************************************************
646 *************************************************/
648 /* This function sets a new uid and gid permanently, optionally calling
649 initgroups() to set auxiliary groups. There are some special cases when running
650 Exim in unprivileged modes. In these situations the effective uid will not be
651 root; if we already have the right effective uid/gid, and don't need to
652 initialize any groups, leave things as they are.
657 igflag TRUE if initgroups() wanted
658 msg text to use in debugging output and failure log
660 Returns: nothing; bombs out on failure
664 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
666 uid_t euid = geteuid();
667 gid_t egid = getegid();
669 if (euid == root_uid || euid != uid || egid != gid || igflag)
671 /* At least one OS returns +1 for initgroups failure, so just check for
676 struct passwd *pw = getpwuid(uid);
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
679 "no passwd entry for uid=%ld", (long int)uid);
681 if (initgroups(pw->pw_name, gid) != 0)
682 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
683 (long int)uid, strerror(errno));
686 if (setgid(gid) < 0 || setuid(uid) < 0)
687 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
688 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
691 /* Debugging output included uid/gid and all groups */
695 int group_count, save_errno;
696 gid_t group_list[EXIM_GROUPLIST_SIZE];
697 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
698 (long int)geteuid(), (long int)getegid(), (long int)getpid());
699 group_count = getgroups(nelem(group_list), group_list);
701 debug_printf(" auxiliary group list:");
703 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
704 else if (group_count < 0)
705 debug_printf(" <error: %s>", strerror(save_errno));
706 else debug_printf(" <none>");
714 /*************************************************
716 *************************************************/
718 /* Exim exits via this function so that it always clears up any open
724 Returns: does not return
733 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
734 ">>>>>>>>>>>>>>>>\n",
735 (int)getpid(), process_purpose, rc);
741 exim_underbar_exit(int rc)
745 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
746 ">>>>>>>>>>>>>>>>\n",
747 (int)getpid(), process_purpose, rc);
753 /* Print error string, then die */
755 exim_fail(const char * fmt, ...)
759 vfprintf(stderr, fmt, ap);
763 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
764 of chown()/fchown(). See src/functions.h for more explanation */
766 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
768 int saved_errno = errno; /* from the preceeding chown call */
770 log_write(0, LOG_MAIN|LOG_PANIC,
771 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
772 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
773 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
775 /* I leave this here, commented, in case the "bug"(?) comes up again.
776 It is not an Exim bug, but we can provide a workaround.
782 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
784 if (buf.st_uid == owner && buf.st_gid == group) return 0;
785 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
787 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
795 /*************************************************
796 * Extract port from host address *
797 *************************************************/
799 /* Called to extract the port from the values given to -oMa and -oMi.
800 It also checks the syntax of the address, and terminates it before the
801 port data when a port is extracted.
804 address the address, with possible port on the end
806 Returns: the port, or zero if there isn't one
807 bombs out on a syntax error
811 check_port(uschar *address)
813 int port = host_address_extract_port(address);
814 if (string_is_ip_address(address, NULL) == 0)
815 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
821 /*************************************************
822 * Test/verify an address *
823 *************************************************/
825 /* This function is called by the -bv and -bt code. It extracts a working
826 address from a full RFC 822 address. This isn't really necessary per se, but it
827 has the effect of collapsing source routes.
831 flags flag bits for verify_address()
832 exit_value to be set for failures
838 test_address(uschar *s, int flags, int *exit_value)
840 int start, end, domain;
841 uschar *parse_error = NULL;
842 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
846 fprintf(stdout, "syntax error: %s\n", parse_error);
851 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
852 -1, -1, NULL, NULL, NULL);
853 if (rc == FAIL) *exit_value = 2;
854 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
860 /*************************************************
861 * Show supported features *
862 *************************************************/
865 show_db_version(FILE * f)
867 #ifdef DB_VERSION_STRING
870 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
871 fprintf(f, " Runtime: %s\n",
872 db_version(NULL, NULL, NULL));
875 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
877 #elif defined(BTREEVERSION) && defined(HASHVERSION)
879 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
881 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
884 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
885 fprintf(f, "Probably ndbm\n");
886 #elif defined(USE_TDB)
887 fprintf(f, "Using tdb\n");
890 fprintf(f, "Probably GDBM (native mode)\n");
892 fprintf(f, "Probably GDBM (compatibility mode)\n");
898 /* This function is called for -bV/--version and for -d to output the optional
899 features of the current Exim binary.
901 Arguments: a FILE for printing
906 show_whats_supported(FILE * fp)
908 rmark reset_point = store_mark();
910 DEBUG(D_any) {} else show_db_version(fp);
912 g = string_cat(NULL, US"Support for:");
913 #ifdef SUPPORT_CRYPTEQ
914 g = string_cat(g, US" crypteq");
917 g = string_cat(g, US" iconv()");
920 g = string_cat(g, US" IPv6");
922 #ifdef HAVE_SETCLASSRESOURCES
923 g = string_cat(g, US" use_setclassresources");
926 g = string_cat(g, US" PAM");
929 g = string_cat(g, US" Perl");
932 g = string_cat(g, US" Expand_dlfunc");
934 #ifdef USE_TCP_WRAPPERS
935 g = string_cat(g, US" TCPwrappers");
938 g = string_cat(g, US" GnuTLS");
941 g = string_cat(g, US" OpenSSL");
943 #ifndef DISABLE_TLS_RESUME
944 g = string_cat(g, US" TLS_resume");
946 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
947 g = string_cat(g, US" translate_ip_address");
949 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
950 g = string_cat(g, US" move_frozen_messages");
952 #ifdef WITH_CONTENT_SCAN
953 g = string_cat(g, US" Content_Scanning");
956 g = string_cat(g, US" DANE");
959 g = string_cat(g, US" DKIM");
962 g = string_cat(g, US" DMARC");
964 #ifndef DISABLE_DNSSEC
965 g = string_cat(g, US" DNSSEC");
967 #ifndef DISABLE_EVENT
968 g = string_cat(g, US" Event");
971 g = string_cat(g, US" I18N");
974 g = string_cat(g, US" OCSP");
976 #ifndef DISABLE_PIPE_CONNECT
977 g = string_cat(g, US" PIPE_CONNECT");
980 g = string_cat(g, US" PRDR");
983 g = string_cat(g, US" PROXY");
985 #ifndef DISABLE_QUEUE_RAMP
986 g = string_cat(g, US" Experimental_Queue_Ramp");
989 g = string_cat(g, US" SOCKS");
992 g = string_cat(g, US" SPF");
994 #if defined(SUPPORT_SRS)
995 g = string_cat(g, US" SRS");
999 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1001 #ifdef EXPERIMENTAL_ARC
1002 g = string_cat(g, US" Experimental_ARC");
1004 #ifdef EXPERIMENTAL_BRIGHTMAIL
1005 g = string_cat(g, US" Experimental_Brightmail");
1007 #ifdef EXPERIMENTAL_DCC
1008 g = string_cat(g, US" Experimental_DCC");
1010 #ifdef EXPERIMENTAL_DSN_INFO
1011 g = string_cat(g, US" Experimental_DSN_info");
1013 #ifdef EXPERIMENTAL_QUEUEFILE
1014 g = string_cat(g, US" Experimental_QUEUEFILE");
1016 #if defined(EXPERIMENTAL_SRS_ALT)
1017 g = string_cat(g, US" Experimental_SRS");
1019 g = string_cat(g, US"\n");
1021 g = string_cat(g, US"Lookups (built-in):");
1022 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1023 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1025 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1026 g = string_cat(g, US" cdb");
1028 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1029 g = string_cat(g, US" dbm dbmjz dbmnz");
1031 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1032 g = string_cat(g, US" dnsdb");
1034 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1035 g = string_cat(g, US" dsearch");
1037 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1038 g = string_cat(g, US" ibase");
1040 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1041 g = string_cat(g, US" json");
1043 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1044 g = string_cat(g, US" ldap ldapdn ldapm");
1047 g = string_cat(g, US" lmdb");
1049 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1050 g = string_cat(g, US" mysql");
1052 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1053 g = string_cat(g, US" nis nis0");
1055 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1056 g = string_cat(g, US" nisplus");
1058 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1059 g = string_cat(g, US" oracle");
1061 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1062 g = string_cat(g, US" passwd");
1064 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1065 g = string_cat(g, US" pgsql");
1067 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1068 g = string_cat(g, US" redis");
1070 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1071 g = string_cat(g, US" sqlite");
1073 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1074 g = string_cat(g, US" testdb");
1076 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1077 g = string_cat(g, US" whoson");
1079 g = string_cat(g, US"\n");
1081 g = auth_show_supported(g);
1082 g = route_show_supported(g);
1083 g = transport_show_supported(g);
1085 #ifdef WITH_CONTENT_SCAN
1086 g = malware_show_supported(g);
1089 if (fixed_never_users[0] > 0)
1092 g = string_cat(g, US"Fixed never_users: ");
1093 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1094 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1095 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1098 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1099 fputs(CS string_from_gstring(g), fp);
1101 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1103 /* Everything else is details which are only worth reporting when debugging.
1104 Perhaps the tls_version_report should move into this too. */
1107 /* clang defines __GNUC__ (at least, for me) so test for it first */
1108 #if defined(__clang__)
1109 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1110 #elif defined(__GNUC__)
1111 fprintf(fp, "Compiler: GCC [%s]\n",
1115 "? unknown version ?"
1119 fprintf(fp, "Compiler: <unknown>\n");
1122 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1123 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1124 __GLIBC__, __GLIBC_MINOR__);
1125 if (__GLIBC_PREREQ(2, 1))
1126 fprintf(fp, " Runtime: %s\n",
1127 gnu_get_libc_version());
1130 show_db_version(fp);
1133 tls_version_report(fp);
1136 utf8_version_report(fp);
1139 spf_lib_version_report(fp);
1142 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1143 if (authi->version_report)
1144 (*authi->version_report)(fp);
1146 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1147 characters; unless it's an ancient version of PCRE in which case it
1149 #ifndef PCRE_PRERELEASE
1150 # define PCRE_PRERELEASE
1153 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1154 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1156 PCRE_MAJOR, PCRE_MINOR,
1157 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1160 #undef EXPAND_AND_QUOTE
1163 for (int i = 0; i < lookup_list_count; i++)
1164 if (lookup_list[i]->version_report)
1165 lookup_list[i]->version_report(fp);
1167 #ifdef WHITELIST_D_MACROS
1168 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1170 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1172 #ifdef TRUSTED_CONFIG_LIST
1173 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1175 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1179 store_reset(reset_point);
1183 /*************************************************
1184 * Show auxiliary information about Exim *
1185 *************************************************/
1188 show_exim_information(enum commandline_info request, FILE *stream)
1193 fprintf(stream, "Oops, something went wrong.\n");
1197 "The -bI: flag takes a string indicating which information to provide.\n"
1198 "If the string is not recognised, you'll get this help (on stderr).\n"
1200 " exim -bI:help this information\n"
1201 " exim -bI:dscp list of known dscp value keywords\n"
1202 " exim -bI:sieve list of supported sieve extensions\n"
1206 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1207 fprintf(stream, "%s\n", *pp);
1210 dscp_list_to_stream(stream);
1216 /*************************************************
1217 * Quote a local part *
1218 *************************************************/
1220 /* This function is used when a sender address or a From: or Sender: header
1221 line is being created from the caller's login, or from an authenticated_id. It
1222 applies appropriate quoting rules for a local part.
1224 Argument: the local part
1225 Returns: the local part, quoted if necessary
1229 local_part_quote(uschar *lpart)
1231 BOOL needs_quote = FALSE;
1234 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1236 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1237 (*t != '.' || t == lpart || t[1] == 0);
1240 if (!needs_quote) return lpart;
1242 g = string_catn(NULL, US"\"", 1);
1246 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1249 g = string_cat(g, lpart);
1252 g = string_catn(g, lpart, nq - lpart);
1253 g = string_catn(g, US"\\", 1);
1254 g = string_catn(g, nq, 1);
1258 g = string_catn(g, US"\"", 1);
1259 return string_from_gstring(g);
1265 /*************************************************
1266 * Load readline() functions *
1267 *************************************************/
1269 /* This function is called from testing executions that read data from stdin,
1270 but only when running as the calling user. Currently, only -be does this. The
1271 function loads the readline() function library and passes back the functions.
1272 On some systems, it needs the curses library, so load that too, but try without
1273 it if loading fails. All this functionality has to be requested at build time.
1276 fn_readline_ptr pointer to where to put the readline pointer
1277 fn_addhist_ptr pointer to where to put the addhistory function
1279 Returns: the dlopen handle or NULL on failure
1283 set_readline(char * (**fn_readline_ptr)(const char *),
1284 void (**fn_addhist_ptr)(const char *))
1287 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1289 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1290 if (dlhandle_curses) dlclose(dlhandle_curses);
1294 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1295 * char * readline (const char *prompt);
1296 * void add_history (const char *string);
1298 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1299 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1302 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1310 /*************************************************
1311 * Get a line from stdin for testing things *
1312 *************************************************/
1314 /* This function is called when running tests that can take a number of lines
1315 of input (for example, -be and -bt). It handles continuations and trailing
1316 spaces. And prompting and a blank line output on eof. If readline() is in use,
1317 the arguments are non-NULL and provide the relevant functions.
1320 fn_readline readline function or NULL
1321 fn_addhist addhist function or NULL
1323 Returns: pointer to dynamic memory, or NULL at end of file
1327 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1331 if (!fn_readline) { printf("> "); fflush(stdout); }
1333 for (int i = 0;; i++)
1335 uschar buffer[1024];
1339 char *readline_line = NULL;
1342 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1343 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1344 p = US readline_line;
1349 /* readline() not in use */
1352 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1356 /* Handle the line */
1358 ss = p + (int)Ustrlen(p);
1359 while (ss > p && isspace(ss[-1])) ss--;
1362 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1364 g = string_catn(g, p, ss - p);
1367 if (fn_readline) free(readline_line);
1370 /* g can only be NULL if ss==p */
1371 if (ss == p || g->s[g->ptr-1] != '\\')
1375 (void) string_from_gstring(g);
1378 if (!g) printf("\n");
1379 return string_from_gstring(g);
1384 /*************************************************
1385 * Output usage information for the program *
1386 *************************************************/
1388 /* This function is called when there are no recipients
1389 or a specific --help argument was added.
1392 progname information on what name we were called by
1394 Returns: DOES NOT RETURN
1398 exim_usage(uschar *progname)
1401 /* Handle specific program invocation variants */
1402 if (Ustrcmp(progname, US"-mailq") == 0)
1404 "mailq - list the contents of the mail queue\n\n"
1405 "For a list of options, see the Exim documentation.\n");
1407 /* Generic usage - we output this whatever happens */
1409 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1410 "not directly from a shell command line. Options and/or arguments control\n"
1411 "what it does when called. For a list of options, see the Exim documentation.\n");
1416 /*************************************************
1417 * Validate that the macros given are okay *
1418 *************************************************/
1420 /* Typically, Exim will drop privileges if macros are supplied. In some
1421 cases, we want to not do so.
1423 Arguments: opt_D_used - true if the commandline had a "-D" option
1424 Returns: true if trusted, false otherwise
1428 macros_trusted(BOOL opt_D_used)
1430 #ifdef WHITELIST_D_MACROS
1431 uschar *whitelisted, *end, *p, **whites;
1432 int white_count, i, n;
1434 BOOL prev_char_item, found;
1439 #ifndef WHITELIST_D_MACROS
1443 /* We only trust -D overrides for some invoking users:
1444 root, the exim run-time user, the optional config owner user.
1445 I don't know why config-owner would be needed, but since they can own the
1446 config files anyway, there's no security risk to letting them override -D. */
1447 if ( ! ((real_uid == root_uid)
1448 || (real_uid == exim_uid)
1449 #ifdef CONFIGURE_OWNER
1450 || (real_uid == config_uid)
1454 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1458 /* Get a list of macros which are whitelisted */
1459 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1460 prev_char_item = FALSE;
1462 for (p = whitelisted; *p != '\0'; ++p)
1464 if (*p == ':' || isspace(*p))
1469 prev_char_item = FALSE;
1472 if (!prev_char_item)
1473 prev_char_item = TRUE;
1480 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1481 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1486 if (i == white_count)
1488 while (*p != '\0' && p < end)
1494 /* The list of commandline macros should be very short.
1495 Accept the N*M complexity. */
1496 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1499 for (uschar ** w = whites; *w; ++w)
1500 if (Ustrcmp(*w, m->name) == 0)
1507 if (!m->replacement)
1509 if ((len = m->replen) == 0)
1511 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1512 0, PCRE_EOPT, NULL, 0);
1515 if (n != PCRE_ERROR_NOMATCH)
1516 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1520 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1526 /*************************************************
1527 * Expansion testing *
1528 *************************************************/
1530 /* Expand and print one item, doing macro-processing.
1533 item line for expansion
1537 expansion_test_line(uschar * line)
1542 Ustrncpy(big_buffer, line, big_buffer_size);
1543 big_buffer[big_buffer_size-1] = '\0';
1544 len = Ustrlen(big_buffer);
1546 (void) macros_expand(0, &len, &dummy_macexp);
1548 if (isupper(big_buffer[0]))
1550 if (macro_read_assignment(big_buffer))
1551 printf("Defined macro '%s'\n", mlast->name);
1554 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1555 else printf("Failed: %s\n", expand_string_message);
1560 /*************************************************
1561 * Entry point and high-level code *
1562 *************************************************/
1564 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1565 the appropriate action. All the necessary functions are present in the one
1566 binary. I originally thought one should split it up, but it turns out that so
1567 much of the apparatus is needed in each chunk that one might as well just have
1568 it all available all the time, which then makes the coding easier as well.
1571 argc count of entries in argv
1572 argv argument strings, with argv[0] being the program name
1574 Returns: EXIT_SUCCESS if terminated successfully
1575 EXIT_FAILURE otherwise, except when a message has been sent
1576 to the sender, and -oee was given
1580 main(int argc, char **cargv)
1582 uschar **argv = USS cargv;
1583 int arg_receive_timeout = -1;
1584 int arg_smtp_receive_timeout = -1;
1585 int arg_error_handling = error_handling;
1586 int filter_sfd = -1;
1587 int filter_ufd = -1;
1590 int list_queue_option = 0;
1592 int msg_action_arg = -1;
1593 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1594 int queue_only_reason = 0;
1596 int perl_start_option = 0;
1598 int recipients_arg = argc;
1599 int sender_address_domain = 0;
1600 int test_retry_arg = -1;
1601 int test_rewrite_arg = -1;
1602 gid_t original_egid;
1603 BOOL arg_queue_only = FALSE;
1604 BOOL bi_option = FALSE;
1605 BOOL checking = FALSE;
1606 BOOL count_queue = FALSE;
1607 BOOL expansion_test = FALSE;
1608 BOOL extract_recipients = FALSE;
1609 BOOL flag_G = FALSE;
1610 BOOL flag_n = FALSE;
1611 BOOL forced_delivery = FALSE;
1612 BOOL f_end_dot = FALSE;
1613 BOOL deliver_give_up = FALSE;
1614 BOOL list_queue = FALSE;
1615 BOOL list_options = FALSE;
1616 BOOL list_config = FALSE;
1617 BOOL local_queue_only;
1619 BOOL one_msg_action = FALSE;
1620 BOOL opt_D_used = FALSE;
1621 BOOL queue_only_set = FALSE;
1622 BOOL receiving_message = TRUE;
1623 BOOL sender_ident_set = FALSE;
1624 BOOL session_local_queue_only;
1626 BOOL removed_privilege = FALSE;
1627 BOOL usage_wanted = FALSE;
1628 BOOL verify_address_mode = FALSE;
1629 BOOL verify_as_sender = FALSE;
1630 BOOL rcpt_verify_quota = FALSE;
1631 BOOL version_printed = FALSE;
1632 uschar *alias_arg = NULL;
1633 uschar *called_as = US"";
1634 uschar *cmdline_syslog_name = NULL;
1635 uschar *start_queue_run_id = NULL;
1636 uschar *stop_queue_run_id = NULL;
1637 uschar *expansion_test_message = NULL;
1638 uschar *ftest_domain = NULL;
1639 uschar *ftest_localpart = NULL;
1640 uschar *ftest_prefix = NULL;
1641 uschar *ftest_suffix = NULL;
1642 uschar *log_oneline = NULL;
1643 uschar *malware_test_file = NULL;
1644 uschar *real_sender_address;
1645 uschar *originator_home = US"/";
1649 struct stat statbuf;
1650 pid_t passed_qr_pid = (pid_t)0;
1651 int passed_qr_pipe = -1;
1652 gid_t group_list[EXIM_GROUPLIST_SIZE];
1654 /* For the -bI: flag */
1655 enum commandline_info info_flag = CMDINFO_NONE;
1656 BOOL info_stdout = FALSE;
1658 /* Possible options for -R and -S */
1660 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1662 /* Need to define this in case we need to change the environment in order
1663 to get rid of a bogus time zone. We have to make it char rather than uschar
1664 because some OS define it in /usr/include/unistd.h. */
1666 extern char **environ;
1668 #ifdef MEASURE_TIMING
1669 (void)gettimeofday(×tamp_startup, NULL);
1672 store_init(); /* Initialise the memory allocation susbsystem */
1674 /* If the Exim user and/or group and/or the configuration file owner/group were
1675 defined by ref:name at build time, we must now find the actual uid/gid values.
1676 This is a feature to make the lives of binary distributors easier. */
1678 #ifdef EXIM_USERNAME
1679 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1682 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1684 /* If ref:name uses a number as the name, route_finduser() returns
1685 TRUE with exim_uid set and pw coerced to NULL. */
1687 exim_gid = pw->pw_gid;
1688 #ifndef EXIM_GROUPNAME
1691 "exim: ref:name should specify a usercode, not a group.\n"
1692 "exim: can't let you get away with it unless you also specify a group.\n");
1696 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1699 #ifdef EXIM_GROUPNAME
1700 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1701 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1704 #ifdef CONFIGURE_OWNERNAME
1705 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1706 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1707 CONFIGURE_OWNERNAME);
1710 /* We default the system_filter_user to be the Exim run-time user, as a
1711 sane non-root value. */
1712 system_filter_uid = exim_uid;
1714 #ifdef CONFIGURE_GROUPNAME
1715 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1716 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1717 CONFIGURE_GROUPNAME);
1720 /* In the Cygwin environment, some initialization used to need doing.
1721 It was fudged in by means of this macro; now no longer but we'll leave
1722 it in case of others. */
1728 /* Check a field which is patched when we are running Exim within its
1729 testing harness; do a fast initial check, and then the whole thing. */
1731 f.running_in_test_harness =
1732 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1733 if (f.running_in_test_harness)
1736 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1737 at the start of a program; however, it seems that some environments do not
1738 follow this. A "strange" locale can affect the formatting of timestamps, so we
1741 setlocale(LC_ALL, "C");
1743 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1745 #ifdef _POSIX_MONOTONIC_CLOCK
1749 /* Set up the default handler for timing using alarm(). */
1751 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1753 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1754 because store_malloc writes a log entry on failure. */
1756 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1757 exim_fail("exim: failed to get store for log buffer\n");
1759 /* Initialize the default log options. */
1761 bits_set(log_selector, log_selector_size, log_default);
1763 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1764 NULL when the daemon is run and the file is closed. We have to use this
1765 indirection, because some systems don't allow writing to the variable "stderr".
1768 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1770 /* Arrange for the PCRE regex library to use our store functions. Note that
1771 the normal calls are actually macros that add additional arguments for
1772 debugging purposes so we have to assign specially constructed functions here.
1773 The default is to use store in the stacking pool, but this is overridden in the
1774 regex_must_compile() function. */
1776 pcre_malloc = function_store_get;
1777 pcre_free = function_dummy_free;
1779 /* Ensure there is a big buffer for temporary use in several places. It is put
1780 in malloc store so that it can be freed for enlargement if necessary. */
1782 big_buffer = store_malloc(big_buffer_size);
1784 /* Set up the handler for the data request signal, and set the initial
1785 descriptive text. */
1787 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1788 set_process_info("initializing");
1789 os_restarting_signal(SIGUSR1, usr1_handler);
1791 /* If running in a dockerized environment, the TERM signal is only
1792 delegated to the PID 1 if we request it by setting an signal handler */
1793 if (getpid() == 1) signal(SIGTERM, term_handler);
1795 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1796 in the daemon code. For the rest of Exim's uses, we ignore it. */
1798 signal(SIGHUP, SIG_IGN);
1800 /* We don't want to die on pipe errors as the code is written to handle
1801 the write error instead. */
1803 signal(SIGPIPE, SIG_IGN);
1805 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1806 set to SIG_IGN. This causes subprocesses that complete before the parent
1807 process waits for them not to hang around, so when Exim calls wait(), nothing
1808 is there. The wait() code has been made robust against this, but let's ensure
1809 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1810 ending status. We use sigaction rather than plain signal() on those OS where
1811 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1812 problem on AIX with this.) */
1816 struct sigaction act;
1817 act.sa_handler = SIG_DFL;
1818 sigemptyset(&(act.sa_mask));
1820 sigaction(SIGCHLD, &act, NULL);
1823 signal(SIGCHLD, SIG_DFL);
1826 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1831 /* Set up the version number. Set up the leading 'E' for the external form of
1832 message ids, set the pointer to the internal form, and initialize it to
1833 indicate no message being processed. */
1836 message_id_option[0] = '-';
1837 message_id_external = message_id_option + 1;
1838 message_id_external[0] = 'E';
1839 message_id = message_id_external + 1;
1842 /* Set the umask to zero so that any files Exim creates using open() are
1843 created with the modes that it specifies. NOTE: Files created with fopen() have
1844 a problem, which was not recognized till rather late (February 2006). With this
1845 umask, such files will be world writeable. (They are all content scanning files
1846 in the spool directory, which isn't world-accessible, so this is not a
1847 disaster, but it's untidy.) I don't want to change this overall setting,
1848 however, because it will interact badly with the open() calls. Instead, there's
1849 now a function called modefopen() that fiddles with the umask while calling
1854 /* Precompile the regular expression for matching a message id. Keep this in
1855 step with the code that generates ids in the accept.c module. We need to do
1856 this here, because the -M options check their arguments for syntactic validity
1857 using mac_ismsgid, which uses this. */
1860 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1862 /* Precompile the regular expression that is used for matching an SMTP error
1863 code, possibly extended, at the start of an error message. Note that the
1864 terminating whitespace character is included. */
1867 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1870 #ifdef WHITELIST_D_MACROS
1871 /* Precompile the regular expression used to filter the content of macros
1872 given to -D for permissibility. */
1874 regex_whitelisted_macro =
1875 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1878 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1880 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1881 this seems to be a generally accepted convention, since one finds symbolic
1882 links called "mailq" in standard OS configurations. */
1884 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1885 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1888 receiving_message = FALSE;
1889 called_as = US"-mailq";
1892 /* If the program is called as "rmail" treat it as equivalent to
1893 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1894 i.e. preventing a single dot on a line from terminating the message, and
1895 returning with zero return code, even in cases of error (provided an error
1896 message has been sent). */
1898 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1899 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1902 called_as = US"-rmail";
1903 errors_sender_rc = EXIT_SUCCESS;
1906 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1907 this is a smail convention. */
1909 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1910 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1912 smtp_input = smtp_batched_input = TRUE;
1913 called_as = US"-rsmtp";
1916 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1917 this is a smail convention. */
1919 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1920 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1923 receiving_message = FALSE;
1924 called_as = US"-runq";
1927 /* If the program is called as "newaliases" treat it as equivalent to
1928 "exim -bi"; this is a sendmail convention. */
1930 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1931 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1934 receiving_message = FALSE;
1935 called_as = US"-newaliases";
1938 /* Save the original effective uid for a couple of uses later. It should
1939 normally be root, but in some esoteric environments it may not be. */
1941 original_euid = geteuid();
1942 original_egid = getegid();
1944 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1945 to be the same as the real ones. This makes a difference only if Exim is setuid
1946 (or setgid) to something other than root, which could be the case in some
1947 special configurations. */
1949 real_uid = getuid();
1950 real_gid = getgid();
1952 if (real_uid == root_uid)
1954 if ((rv = setgid(real_gid)))
1955 exim_fail("exim: setgid(%ld) failed: %s\n",
1956 (long int)real_gid, strerror(errno));
1957 if ((rv = setuid(real_uid)))
1958 exim_fail("exim: setuid(%ld) failed: %s\n",
1959 (long int)real_uid, strerror(errno));
1962 /* If neither the original real uid nor the original euid was root, Exim is
1963 running in an unprivileged state. */
1965 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1967 /* For most of the args-parsing we need to use permanent pool memory */
1969 int old_pool = store_pool;
1970 store_pool = POOL_PERM;
1972 /* Scan the program's arguments. Some can be dealt with right away; others are
1973 simply recorded for checking and handling afterwards. Do a high-level switch
1974 on the second character (the one after '-'), to save some effort. */
1976 for (i = 1; i < argc; i++)
1978 BOOL badarg = FALSE;
1979 uschar * arg = argv[i];
1983 /* An argument not starting with '-' is the start of a recipients list;
1984 break out of the options-scanning loop. */
1992 /* An option consisting of -- terminates the options */
1994 if (Ustrcmp(arg, "--") == 0)
1996 recipients_arg = i + 1;
2000 /* Handle flagged options */
2002 switchchar = arg[1];
2005 /* Make all -ex options synonymous with -oex arguments, since that
2006 is assumed by various callers. Also make -qR options synonymous with -R
2007 options, as that seems to be required as well. Allow for -qqR too, and
2008 the same for -S options. */
2010 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2011 Ustrncmp(arg+1, "qR", 2) == 0 ||
2012 Ustrncmp(arg+1, "qS", 2) == 0)
2014 switchchar = arg[2];
2017 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2019 switchchar = arg[3];
2021 f.queue_2stage = TRUE;
2024 /* Make -r synonymous with -f, since it is a documented alias */
2026 else if (arg[1] == 'r') switchchar = 'f';
2028 /* Make -ov synonymous with -v */
2030 else if (Ustrcmp(arg, "-ov") == 0)
2036 /* deal with --option_aliases */
2037 else if (switchchar == '-')
2039 if (Ustrcmp(argrest, "help") == 0)
2041 usage_wanted = TRUE;
2044 else if (Ustrcmp(argrest, "version") == 0)
2051 /* High-level switch on active initial letter */
2056 /* sendmail uses -Ac and -Am to control which .cf file is used;
2059 if (!*argrest) { badarg = TRUE; break; }
2062 BOOL ignore = FALSE;
2067 if (*(argrest + 1) == '\0')
2071 if (!ignore) badarg = TRUE;
2075 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2076 so has no need of it. */
2079 if (!*argrest) i++; /* Skip over the type */
2085 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2089 /* -bd: Run in daemon mode, awaiting SMTP connections.
2090 -bdf: Ditto, but in the foreground.
2093 f.daemon_listen = TRUE;
2094 if (*argrest == 'f') f.background_daemon = FALSE;
2095 else if (*argrest) badarg = TRUE;
2098 /* -be: Run in expansion test mode
2099 -bem: Ditto, but read a message from a file first
2102 expansion_test = checking = TRUE;
2103 if (*argrest == 'm')
2105 if (++i >= argc) { badarg = TRUE; break; }
2106 expansion_test_message = argv[i];
2109 if (*argrest) badarg = TRUE;
2112 /* -bF: Run system filter test */
2114 filter_test |= checking = FTEST_SYSTEM;
2115 if (*argrest) badarg = TRUE;
2116 else if (++i < argc) filter_test_sfile = argv[i];
2117 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2120 /* -bf: Run user filter test
2121 -bfd: Set domain for filter testing
2122 -bfl: Set local part for filter testing
2123 -bfp: Set prefix for filter testing
2124 -bfs: Set suffix for filter testing
2129 filter_test |= checking = FTEST_USER;
2130 if (++i < argc) filter_test_ufile = argv[i];
2131 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2136 exim_fail("exim: string expected after %s\n", arg);
2137 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2138 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2139 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2140 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2145 /* -bh: Host checking - an IP address must follow. */
2147 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2149 if (++i >= argc) { badarg = TRUE; break; }
2150 sender_host_address = string_copy_taint(argv[i], TRUE);
2151 host_checking = checking = f.log_testing_mode = TRUE;
2152 f.host_checking_callout = *argrest == 'c';
2153 message_logs = FALSE;
2158 /* -bi: This option is used by sendmail to initialize *the* alias file,
2159 though it has the -oA option to specify a different file. Exim has no
2160 concept of *the* alias file, but since Sun's YP make script calls
2161 sendmail this way, some support must be provided. */
2163 if (!*argrest) bi_option = TRUE;
2167 /* -bI: provide information, of the type to follow after a colon.
2168 This is an Exim flag. */
2170 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2172 uschar *p = argrest+1;
2173 info_flag = CMDINFO_HELP;
2175 if (strcmpic(p, CUS"sieve") == 0)
2177 info_flag = CMDINFO_SIEVE;
2180 else if (strcmpic(p, CUS"dscp") == 0)
2182 info_flag = CMDINFO_DSCP;
2185 else if (strcmpic(p, CUS"help") == 0)
2191 /* -bm: Accept and deliver message - the default option. Reinstate
2192 receiving_message, which got turned off for all -b options.
2193 -bmalware: test the filename given for malware */
2195 if (!*argrest) receiving_message = TRUE;
2196 else if (Ustrcmp(argrest, "alware") == 0)
2198 if (++i >= argc) { badarg = TRUE; break; }
2200 malware_test_file = argv[i];
2205 /* -bnq: For locally originating messages, do not qualify unqualified
2206 addresses. In the envelope, this causes errors; in header lines they
2209 if (Ustrcmp(argrest, "q") == 0)
2211 f.allow_unqualified_sender = FALSE;
2212 f.allow_unqualified_recipient = FALSE;
2217 /* -bpxx: List the contents of the mail queue, in various forms. If
2218 the option is -bpc, just a queue count is needed. Otherwise, if the
2219 first letter after p is r, then order is random. */
2221 if (*argrest == 'c')
2224 if (*++argrest) badarg = TRUE;
2228 if (*argrest == 'r')
2230 list_queue_option = 8;
2233 else list_queue_option = 0;
2237 /* -bp: List the contents of the mail queue, top-level only */
2241 /* -bpu: List the contents of the mail queue, top-level undelivered */
2243 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2245 /* -bpa: List the contents of the mail queue, including all delivered */
2247 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2249 /* Unknown after -bp[r] */
2255 /* -bP: List the configuration variables given as the address list.
2256 Force -v, so configuration errors get displayed. */
2259 /* -bP config: we need to setup here, because later,
2260 * when list_options is checked, the config is read already */
2263 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2266 readconf_save_config(version_string);
2270 list_options = TRUE;
2271 debug_selector |= D_v;
2272 debug_file = stderr;
2276 /* -brt: Test retry configuration lookup */
2278 if (Ustrcmp(argrest, "t") == 0)
2281 test_retry_arg = i + 1;
2285 /* -brw: Test rewrite configuration */
2287 else if (Ustrcmp(argrest, "w") == 0)
2290 test_rewrite_arg = i + 1;
2296 /* -bS: Read SMTP commands on standard input, but produce no replies -
2297 all errors are reported by sending messages. */
2300 smtp_input = smtp_batched_input = receiving_message = TRUE;
2304 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2305 on standard output. */
2307 if (!*argrest) smtp_input = receiving_message = TRUE;
2311 /* -bt: address testing mode */
2314 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2318 /* -bv: verify addresses */
2321 verify_address_mode = checking = f.log_testing_mode = TRUE;
2323 /* -bvs: verify sender addresses */
2325 else if (Ustrcmp(argrest, "s") == 0)
2327 verify_address_mode = checking = f.log_testing_mode = TRUE;
2328 verify_as_sender = TRUE;
2333 /* -bV: Print version string and support details */
2337 printf("Exim version %s #%s built %s\n", version_string,
2338 version_cnumber, version_date);
2339 printf("%s\n", CS version_copyright);
2340 version_printed = TRUE;
2341 show_whats_supported(stdout);
2342 f.log_testing_mode = TRUE;
2347 /* -bw: inetd wait mode, accept a listening socket as stdin */
2349 f.inetd_wait_mode = TRUE;
2350 f.background_daemon = FALSE;
2351 f.daemon_listen = TRUE;
2353 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2354 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2365 /* -C: change configuration file list; ignore if it isn't really
2366 a change! Enforce a prefix check if required. */
2370 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2371 if (Ustrcmp(config_main_filelist, argrest) != 0)
2373 #ifdef ALT_CONFIG_PREFIX
2375 int len = Ustrlen(ALT_CONFIG_PREFIX);
2376 const uschar *list = argrest;
2378 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2379 while((filename = string_nextinlist(&list, &sep, big_buffer,
2381 if ( ( Ustrlen(filename) < len
2382 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2383 || Ustrstr(filename, "/../") != NULL
2385 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2387 exim_fail("-C Permission denied\n");
2389 if (real_uid != root_uid)
2391 #ifdef TRUSTED_CONFIG_LIST
2393 if (real_uid != exim_uid
2394 #ifdef CONFIGURE_OWNER
2395 && real_uid != config_uid
2398 f.trusted_config = FALSE;
2401 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2404 struct stat statbuf;
2406 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2407 (statbuf.st_uid != root_uid /* owner not root */
2408 #ifdef CONFIGURE_OWNER
2409 && statbuf.st_uid != config_uid /* owner not the special one */
2412 (statbuf.st_gid != root_gid /* group not root */
2413 #ifdef CONFIGURE_GROUP
2414 && statbuf.st_gid != config_gid /* group not the special one */
2416 && (statbuf.st_mode & 020) != 0 /* group writeable */
2418 (statbuf.st_mode & 2) != 0) /* world writeable */
2420 f.trusted_config = FALSE;
2425 /* Well, the trust list at least is up to scratch... */
2427 uschar *trusted_configs[32];
2430 int old_pool = store_pool;
2431 store_pool = POOL_MAIN;
2433 reset_point = store_mark();
2434 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2436 uschar *start = big_buffer, *nl;
2437 while (*start && isspace(*start))
2441 nl = Ustrchr(start, '\n');
2444 trusted_configs[nr_configs++] = string_copy(start);
2445 if (nr_configs == nelem(trusted_configs))
2453 const uschar *list = argrest;
2455 while (f.trusted_config && (filename = string_nextinlist(&list,
2456 &sep, big_buffer, big_buffer_size)))
2458 for (i=0; i < nr_configs; i++)
2459 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2461 if (i == nr_configs)
2463 f.trusted_config = FALSE;
2468 else /* No valid prefixes found in trust_list file. */
2469 f.trusted_config = FALSE;
2470 store_reset(reset_point);
2471 store_pool = old_pool;
2474 else /* Could not open trust_list file. */
2475 f.trusted_config = FALSE;
2478 /* Not root; don't trust config */
2479 f.trusted_config = FALSE;
2483 config_main_filelist = argrest;
2484 f.config_changed = TRUE;
2489 /* -D: set up a macro definition */
2492 #ifdef DISABLE_D_OPTION
2493 exim_fail("exim: -D is not available in this Exim binary\n");
2499 uschar *s = argrest;
2502 while (isspace(*s)) s++;
2504 if (*s < 'A' || *s > 'Z')
2505 exim_fail("exim: macro name set by -D must start with "
2506 "an upper case letter\n");
2508 while (isalnum(*s) || *s == '_')
2510 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2514 if (ptr == 0) { badarg = TRUE; break; }
2515 while (isspace(*s)) s++;
2518 if (*s++ != '=') { badarg = TRUE; break; }
2519 while (isspace(*s)) s++;
2522 for (m = macros_user; m; m = m->next)
2523 if (Ustrcmp(m->name, name) == 0)
2524 exim_fail("exim: duplicated -D in command line\n");
2526 m = macro_create(name, s, TRUE);
2528 if (clmacro_count >= MAX_CLMACROS)
2529 exim_fail("exim: too many -D options on command line\n");
2530 clmacros[clmacro_count++] =
2531 string_sprintf("-D%s=%s", m->name, m->replacement);
2536 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2537 The latter is now a no-op, retained for compatibility only. If -dd is used,
2538 debugging subprocesses of the daemon is disabled. */
2541 if (Ustrcmp(argrest, "ropcr") == 0)
2543 /* drop_cr = TRUE; */
2546 /* Use an intermediate variable so that we don't set debugging while
2547 decoding the debugging bits. */
2551 unsigned int selector = D_default;
2554 if (*argrest == 'd')
2556 f.debug_daemon = TRUE;
2560 decode_bits(&selector, 1, debug_notall, argrest,
2561 debug_options, debug_options_count, US"debug", 0);
2562 debug_selector = selector;
2567 /* -E: This is a local error message. This option is not intended for
2568 external use at all, but is not restricted to trusted callers because it
2569 does no harm (just suppresses certain error messages) and if Exim is run
2570 not setuid root it won't always be trusted when it generates error
2571 messages using this option. If there is a message id following -E, point
2572 message_reference at it, for logging. */
2575 f.local_error_message = TRUE;
2576 if (mac_ismsgid(argrest)) message_reference = argrest;
2580 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2581 option, so it looks as if historically the -oex options are also callable
2582 without the leading -o. So we have to accept them. Before the switch,
2583 anything starting -oe has been converted to -e. Exim does not support all
2584 of the sendmail error options. */
2587 if (Ustrcmp(argrest, "e") == 0)
2589 arg_error_handling = ERRORS_SENDER;
2590 errors_sender_rc = EXIT_SUCCESS;
2592 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2593 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2594 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2595 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2600 /* -F: Set sender's full name, used instead of the gecos entry from
2601 the password file. Since users can usually alter their gecos entries,
2602 there's no security involved in using this instead. The data can follow
2603 the -F or be in the next argument. */
2607 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2608 originator_name = string_copy_taint(argrest, TRUE);
2609 f.sender_name_forced = TRUE;
2613 /* -f: Set sender's address - this value is only actually used if Exim is
2614 run by a trusted user, or if untrusted_set_sender is set and matches the
2615 address, except that the null address can always be set by any user. The
2616 test for this happens later, when the value given here is ignored when not
2617 permitted. For an untrusted user, the actual sender is still put in Sender:
2618 if it doesn't match the From: header (unless no_local_from_check is set).
2619 The data can follow the -f or be in the next argument. The -r switch is an
2620 obsolete form of -f but since there appear to be programs out there that
2621 use anything that sendmail has ever supported, better accept it - the
2622 synonymizing is done before the switch above.
2624 At this stage, we must allow domain literal addresses, because we don't
2625 know what the setting of allow_domain_literals is yet. Ditto for trailing
2626 dots and strip_trailing_dot. */
2630 int dummy_start, dummy_end;
2633 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2635 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2638 uschar * temp = argrest + Ustrlen(argrest) - 1;
2639 while (temp >= argrest && isspace(*temp)) temp--;
2640 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2641 allow_domain_literals = TRUE;
2642 strip_trailing_dot = TRUE;
2644 allow_utf8_domains = TRUE;
2646 if (!(sender_address = parse_extract_address(argrest, &errmess,
2647 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2648 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2650 sender_address = string_copy_taint(sender_address, TRUE);
2652 message_smtputf8 = string_is_utf8(sender_address);
2653 allow_utf8_domains = FALSE;
2655 allow_domain_literals = FALSE;
2656 strip_trailing_dot = FALSE;
2658 f.sender_address_forced = TRUE;
2662 /* -G: sendmail invocation to specify that it's a gateway submission and
2663 sendmail may complain about problems instead of fixing them.
2664 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2665 not at this time complain about problems. */
2671 /* -h: Set the hop count for an incoming message. Exim does not currently
2672 support this; it always computes it by counting the Received: headers.
2673 To put it in will require a change to the spool header file format. */
2677 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2678 if (!isdigit(*argrest)) badarg = TRUE;
2682 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2683 not to be documented for sendmail but mailx (at least) uses it) */
2686 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2690 /* -L: set the identifier used for syslog; equivalent to setting
2691 syslog_processname in the config file, but needs to be an admin option. */
2695 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2696 if ((sz = Ustrlen(argrest)) > 32)
2697 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2699 exim_fail("exim: the -L syslog name is too short\n");
2700 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2704 receiving_message = FALSE;
2706 /* -MC: continue delivery of another message via an existing open
2707 file descriptor. This option is used for an internal call by the
2708 smtp transport when there is a pending message waiting to go to an
2709 address to which it has got a connection. Five subsequent arguments are
2710 required: transport name, host name, IP address, sequence number, and
2711 message_id. Transports may decline to create new processes if the sequence
2712 number gets too big. The channel is stdin. This (-MC) must be the last
2713 argument. There's a subsequent check that the real-uid is privileged.
2715 If we are running in the test harness. delay for a bit, to let the process
2716 that set this one up complete. This makes for repeatability of the logging,
2719 if (Ustrcmp(argrest, "C") == 0)
2721 union sockaddr_46 interface_sock;
2722 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2725 exim_fail("exim: too many or too few arguments after -MC\n");
2727 if (msg_action_arg >= 0)
2728 exim_fail("exim: incompatible arguments\n");
2730 continue_transport = string_copy_taint(argv[++i], TRUE);
2731 continue_hostname = string_copy_taint(argv[++i], TRUE);
2732 continue_host_address = string_copy_taint(argv[++i], TRUE);
2733 continue_sequence = Uatoi(argv[++i]);
2734 msg_action = MSG_DELIVER;
2735 msg_action_arg = ++i;
2736 forced_delivery = TRUE;
2737 queue_run_pid = passed_qr_pid;
2738 queue_run_pipe = passed_qr_pipe;
2740 if (!mac_ismsgid(argv[i]))
2741 exim_fail("exim: malformed message id %s after -MC option\n",
2744 /* Set up $sending_ip_address and $sending_port, unless proxied */
2746 if (!continue_proxy_cipher)
2747 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2749 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2752 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2755 testharness_pause_ms(500);
2759 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2763 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2764 precedes -MC (see above). The flag indicates that the host to which
2765 Exim is connected has accepted an AUTH sequence. */
2767 case 'A': f.smtp_authenticated = TRUE; break;
2769 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2770 that exim is connected to supports the esmtp extension DSN */
2772 case 'D': smtp_peer_options |= OPTION_DSN; break;
2774 /* -MCd: for debug, set a process-purpose string */
2776 case 'd': if (++i < argc)
2777 process_purpose = string_copy_taint(argv[i], TRUE);
2781 /* -MCG: set the queue name, to a non-default value */
2783 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2787 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2789 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2791 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2792 it preceded -MC (see above) */
2794 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2796 #ifdef SUPPORT_SOCKS
2797 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2798 case 'p': proxy_session = TRUE;
2801 proxy_local_address = string_copy_taint(argv[i], TRUE);
2804 proxy_local_port = Uatoi(argv[i]);
2807 proxy_external_address = string_copy_taint(argv[i], TRUE);
2810 proxy_external_port = Uatoi(argv[i]);
2816 /* -MCQ: pass on the pid of the queue-running process that started
2817 this chain of deliveries and the fd of its synchronizing pipe; this
2818 is useful only when it precedes -MC (see above) */
2820 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2822 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2826 /* -MCq: do a quota check on the given recipient for the given size
2827 of message. Separate from -MC. */
2828 case 'q': rcpt_verify_quota = TRUE;
2829 if (++i < argc) message_size = Uatoi(argv[i]);
2833 /* -MCS: set the smtp_use_size flag; this is useful only when it
2834 precedes -MC (see above) */
2836 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2839 /* -MCs: used with -MCt; SNI was sent */
2840 /* -MCr: ditto, DANE */
2843 case 's': if (++i < argc)
2845 continue_proxy_sni = string_copy_taint(argv[i], TRUE);
2846 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2851 /* -MCt: similar to -MCT below but the connection is still open
2852 via a proxy process which handles the TLS context and coding.
2853 Require three arguments for the proxied local address and port,
2854 and the TLS cipher. */
2856 case 't': if (++i < argc)
2857 sending_ip_address = string_copy_taint(argv[i], TRUE);
2860 sending_port = (int)(Uatol(argv[i]));
2863 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2867 /* -MCT: set the tls_offered flag; this is useful only when it
2868 precedes -MC (see above). The flag indicates that the host to which
2869 Exim is connected has offered TLS support. */
2871 case 'T': smtp_peer_options |= OPTION_TLS; break;
2874 default: badarg = TRUE; break;
2879 /* -M[x]: various operations on the following list of message ids:
2880 -M deliver the messages, ignoring next retry times and thawing
2881 -Mc deliver the messages, checking next retry times, no thawing
2882 -Mf freeze the messages
2883 -Mg give up on the messages
2884 -Mt thaw the messages
2885 -Mrm remove the messages
2886 In the above cases, this must be the last option. There are also the
2887 following options which are followed by a single message id, and which
2888 act on that message. Some of them use the "recipient" addresses as well.
2889 -Mar add recipient(s)
2890 -Mmad mark all recipients delivered
2891 -Mmd mark recipients(s) delivered
2893 -Mset load a message for use with -be
2895 -Mvc show copy (of whole message, in RFC 2822 format)
2902 msg_action = MSG_DELIVER;
2903 forced_delivery = f.deliver_force_thaw = TRUE;
2905 else if (Ustrcmp(argrest, "ar") == 0)
2907 msg_action = MSG_ADD_RECIPIENT;
2908 one_msg_action = TRUE;
2910 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2911 else if (Ustrcmp(argrest, "es") == 0)
2913 msg_action = MSG_EDIT_SENDER;
2914 one_msg_action = TRUE;
2916 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2917 else if (Ustrcmp(argrest, "g") == 0)
2919 msg_action = MSG_DELIVER;
2920 deliver_give_up = TRUE;
2922 else if (Ustrcmp(argrest, "G") == 0)
2924 msg_action = MSG_SETQUEUE;
2925 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2927 else if (Ustrcmp(argrest, "mad") == 0)
2929 msg_action = MSG_MARK_ALL_DELIVERED;
2931 else if (Ustrcmp(argrest, "md") == 0)
2933 msg_action = MSG_MARK_DELIVERED;
2934 one_msg_action = TRUE;
2936 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2937 else if (Ustrcmp(argrest, "set") == 0)
2939 msg_action = MSG_LOAD;
2940 one_msg_action = TRUE;
2942 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2943 else if (Ustrcmp(argrest, "vb") == 0)
2945 msg_action = MSG_SHOW_BODY;
2946 one_msg_action = TRUE;
2948 else if (Ustrcmp(argrest, "vc") == 0)
2950 msg_action = MSG_SHOW_COPY;
2951 one_msg_action = TRUE;
2953 else if (Ustrcmp(argrest, "vh") == 0)
2955 msg_action = MSG_SHOW_HEADER;
2956 one_msg_action = TRUE;
2958 else if (Ustrcmp(argrest, "vl") == 0)
2960 msg_action = MSG_SHOW_LOG;
2961 one_msg_action = TRUE;
2963 else { badarg = TRUE; break; }
2965 /* All the -Mxx options require at least one message id. */
2967 msg_action_arg = i + 1;
2968 if (msg_action_arg >= argc)
2969 exim_fail("exim: no message ids given after %s option\n", arg);
2971 /* Some require only message ids to follow */
2973 if (!one_msg_action)
2975 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2976 exim_fail("exim: malformed message id %s after %s option\n",
2978 goto END_ARG; /* Remaining args are ids */
2981 /* Others require only one message id, possibly followed by addresses,
2982 which will be handled as normal arguments. */
2986 if (!mac_ismsgid(argv[msg_action_arg]))
2987 exim_fail("exim: malformed message id %s after %s option\n",
2988 argv[msg_action_arg], arg);
2994 /* Some programs seem to call the -om option without the leading o;
2995 for sendmail it askes for "me too". Exim always does this. */
2998 if (*argrest) badarg = TRUE;
3002 /* -N: don't do delivery - a debugging option that stops transports doing
3003 their thing. It implies debugging at the D_v level. */
3008 f.dont_deliver = TRUE;
3009 debug_selector |= D_v;
3010 debug_file = stderr;
3016 /* -n: This means "don't alias" in sendmail, apparently.
3017 For normal invocations, it has no effect.
3018 It may affect some other options. */
3024 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3025 option to the specified value. This form uses long names. We need to handle
3026 -O option=value and -Ooption=value. */
3031 exim_fail("exim: string expected after -O\n");
3037 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3040 if (!*(alias_arg = argrest))
3041 if (i+1 < argc) alias_arg = argv[++i];
3042 else exim_fail("exim: string expected after -oA\n");
3045 /* -oB: Set a connection message max value for remote deliveries */
3048 uschar * p = argrest;
3050 if (i+1 < argc && isdigit((argv[i+1][0])))
3054 connection_max_messages = 1;
3061 exim_fail("exim: number expected after -oB\n");
3062 connection_max_messages = Uatoi(p);
3067 /* -odb: background delivery */
3070 if (Ustrcmp(argrest, "b") == 0)
3072 f.synchronous_delivery = FALSE;
3073 arg_queue_only = FALSE;
3074 queue_only_set = TRUE;
3077 /* -odd: testsuite-only: add no inter-process delays */
3079 else if (Ustrcmp(argrest, "d") == 0)
3080 f.testsuite_delays = FALSE;
3082 /* -odf: foreground delivery (smail-compatible option); same effect as
3083 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3086 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3088 f.synchronous_delivery = TRUE;
3089 arg_queue_only = FALSE;
3090 queue_only_set = TRUE;
3093 /* -odq: queue only */
3095 else if (Ustrcmp(argrest, "q") == 0)
3097 f.synchronous_delivery = FALSE;
3098 arg_queue_only = TRUE;
3099 queue_only_set = TRUE;
3102 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3103 but no remote delivery */
3105 else if (Ustrcmp(argrest, "qs") == 0)
3107 f.queue_smtp = TRUE;
3108 arg_queue_only = FALSE;
3109 queue_only_set = TRUE;
3114 /* -oex: Sendmail error flags. As these are also accepted without the
3115 leading -o prefix, for compatibility with vacation and other callers,
3116 they are handled with -e above. */
3118 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3119 -oitrue: Another sendmail syntax for the same */
3122 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3127 /* -oM*: Set various characteristics for an incoming message; actually
3128 acted on for trusted callers only. */
3133 exim_fail("exim: data expected after -oM%s\n", argrest);
3135 /* -oMa: Set sender host address */
3137 if (Ustrcmp(argrest, "a") == 0)
3138 sender_host_address = string_copy_taint(argv[++i], TRUE);
3140 /* -oMaa: Set authenticator name */
3142 else if (Ustrcmp(argrest, "aa") == 0)
3143 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3145 /* -oMas: setting authenticated sender */
3147 else if (Ustrcmp(argrest, "as") == 0)
3148 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3150 /* -oMai: setting authenticated id */
3152 else if (Ustrcmp(argrest, "ai") == 0)
3153 authenticated_id = string_copy_taint(argv[++i], TRUE);
3155 /* -oMi: Set incoming interface address */
3157 else if (Ustrcmp(argrest, "i") == 0)
3158 interface_address = string_copy_taint(argv[++i], TRUE);
3160 /* -oMm: Message reference */
3162 else if (Ustrcmp(argrest, "m") == 0)
3164 if (!mac_ismsgid(argv[i+1]))
3165 exim_fail("-oMm must be a valid message ID\n");
3166 if (!f.trusted_config)
3167 exim_fail("-oMm must be called by a trusted user/config\n");
3168 message_reference = argv[++i];
3171 /* -oMr: Received protocol */
3173 else if (Ustrcmp(argrest, "r") == 0)
3175 if (received_protocol)
3176 exim_fail("received_protocol is set already\n");
3178 received_protocol = string_copy_taint(argv[++i], TRUE);
3180 /* -oMs: Set sender host name */
3182 else if (Ustrcmp(argrest, "s") == 0)
3183 sender_host_name = string_copy_taint(argv[++i], TRUE);
3185 /* -oMt: Set sender ident */
3187 else if (Ustrcmp(argrest, "t") == 0)
3189 sender_ident_set = TRUE;
3190 sender_ident = string_copy_taint(argv[++i], TRUE);
3193 /* Else a bad argument */
3200 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3201 seem to call this as -m (undocumented), so that is also accepted (see
3203 /* -oo: An ancient flag for old-style addresses which still seems to
3204 crop up in some calls (see in SCO). */
3208 if (*argrest) badarg = TRUE;
3211 /* -oP <name>: set pid file path for daemon
3212 -oPX: delete pid file of daemon */
3215 if (!*argrest) override_pid_file_path = argv[++i];
3216 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3221 /* -or <n>: set timeout for non-SMTP acceptance
3222 -os <n>: set timeout for SMTP acceptance */
3227 int * tp = argrest[-1] == 'r'
3228 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3230 *tp = readconf_readtime(argrest, 0, FALSE);
3231 else if (i+1 < argc)
3232 *tp = readconf_readtime(argv[++i], 0, FALSE);
3235 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3239 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3242 if (*argrest) badarg = TRUE;
3243 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3246 /* -oY: Override creation of daemon notifier socket */
3249 if (*argrest) badarg = TRUE;
3250 else notifier_socket = NULL;
3253 /* Unknown -o argument */
3261 /* -ps: force Perl startup; -pd force delayed Perl startup */
3265 if (*argrest == 's' && argrest[1] == 0)
3267 perl_start_option = 1;
3270 if (*argrest == 'd' && argrest[1] == 0)
3272 perl_start_option = -1;
3277 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3278 which sets the host protocol and host name */
3281 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3285 uschar * hn = Ustrchr(argrest, ':');
3287 if (received_protocol)
3288 exim_fail("received_protocol is set already\n");
3291 received_protocol = string_copy_taint(argrest, TRUE);
3294 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3295 sender_host_name = string_copy_taint(hn + 1, TRUE);
3302 receiving_message = FALSE;
3303 if (queue_interval >= 0)
3304 exim_fail("exim: -q specified more than once\n");
3306 /* -qq...: Do queue runs in a 2-stage manner */
3308 if (*argrest == 'q')
3310 f.queue_2stage = TRUE;
3314 /* -qi...: Do only first (initial) deliveries */
3316 if (*argrest == 'i')
3318 f.queue_run_first_delivery = TRUE;
3322 /* -qf...: Run the queue, forcing deliveries
3323 -qff..: Ditto, forcing thawing as well */
3325 if (*argrest == 'f')
3327 f.queue_run_force = TRUE;
3328 if (*++argrest == 'f')
3330 f.deliver_force_thaw = TRUE;
3335 /* -q[f][f]l...: Run the queue only on local deliveries */
3337 if (*argrest == 'l')
3339 f.queue_run_local = TRUE;
3343 /* -q[f][f][l][G<name>]... Work on the named queue */
3345 if (*argrest == 'G')
3348 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3349 queue_name = string_copyn(argrest, i);
3351 if (*argrest == '/') argrest++;
3354 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3355 only, optionally named, optionally starting from a given message id. */
3357 if (!(list_queue || count_queue))
3359 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3362 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3363 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3364 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3365 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3368 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3369 forced, optionally local only, optionally named. */
3371 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3373 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3377 case 'R': /* Synonymous with -qR... */
3378 receiving_message = FALSE;
3380 /* -Rf: As -R (below) but force all deliveries,
3381 -Rff: Ditto, but also thaw all frozen messages,
3382 -Rr: String is regex
3383 -Rrf: Regex and force
3384 -Rrff: Regex and force and thaw
3386 in all cases provided there are no further characters in this
3390 for (int i = 0; i < nelem(rsopts); i++)
3391 if (Ustrcmp(argrest, rsopts[i]) == 0)
3393 if (i != 2) f.queue_run_force = TRUE;
3394 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3395 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3396 argrest += Ustrlen(rsopts[i]);
3399 /* -R: Set string to match in addresses for forced queue run to
3400 pick out particular messages. */
3403 deliver_selectstring = string_copy_taint(argrest, TRUE);
3404 else if (i+1 < argc)
3405 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3407 exim_fail("exim: string expected after -R\n");
3411 /* -r: an obsolete synonym for -f (see above) */
3414 /* -S: Like -R but works on sender. */
3416 case 'S': /* Synonymous with -qS... */
3417 receiving_message = FALSE;
3419 /* -Sf: As -S (below) but force all deliveries,
3420 -Sff: Ditto, but also thaw all frozen messages,
3421 -Sr: String is regex
3422 -Srf: Regex and force
3423 -Srff: Regex and force and thaw
3425 in all cases provided there are no further characters in this
3429 for (int i = 0; i < nelem(rsopts); i++)
3430 if (Ustrcmp(argrest, rsopts[i]) == 0)
3432 if (i != 2) f.queue_run_force = TRUE;
3433 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3434 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3435 argrest += Ustrlen(rsopts[i]);
3438 /* -S: Set string to match in addresses for forced queue run to
3439 pick out particular messages. */
3442 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3443 else if (i+1 < argc)
3444 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3446 exim_fail("exim: string expected after -S\n");
3449 /* -Tqt is an option that is exclusively for use by the testing suite.
3450 It is not recognized in other circumstances. It allows for the setting up
3451 of explicit "queue times" so that various warning/retry things can be
3452 tested. Otherwise variability of clock ticks etc. cause problems. */
3455 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3456 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3461 /* -t: Set flag to extract recipients from body of message. */
3464 if (!*argrest) extract_recipients = TRUE;
3466 /* -ti: Set flag to extract recipients from body of message, and also
3467 specify that dot does not end the message. */
3469 else if (Ustrcmp(argrest, "i") == 0)
3471 extract_recipients = TRUE;
3475 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3478 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3485 /* -U: This means "initial user submission" in sendmail, apparently. The
3486 doc claims that in future sendmail may refuse syntactically invalid
3487 messages instead of fixing them. For the moment, we just ignore it. */
3493 /* -v: verify things - this is a very low-level debugging */
3498 debug_selector |= D_v;
3499 debug_file = stderr;
3505 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3507 The -x flag tells the sendmail command that mail from a local
3508 mail program has National Language Support (NLS) extended characters
3509 in the body of the mail item. The sendmail command can send mail with
3510 extended NLS characters across networks that normally corrupts these
3513 As Exim is 8-bit clean, it just ignores this flag. */
3516 if (*argrest) badarg = TRUE;
3519 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3520 logs to that file. We swallow the parameter and otherwise ignore it. */
3525 exim_fail("exim: string expected after -X\n");
3531 log_oneline = string_copy_taint(argv[i], TRUE);
3533 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3536 /* All other initial characters are errors */
3541 } /* End of high-level switch statement */
3543 /* Failed to recognize the option, or syntax error */
3546 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3547 "option %s\n", arg);
3551 /* If -R or -S have been specified without -q, assume a single queue run. */
3553 if ( (deliver_selectstring || deliver_selectstring_sender)
3554 && queue_interval < 0)
3559 store_pool = old_pool;
3562 /* If usage_wanted is set we call the usage function - which never returns */
3563 if (usage_wanted) exim_usage(called_as);
3565 /* Arguments have been processed. Check for incompatibilities. */
3566 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3567 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3568 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3569 || filter_test != FTEST_NONE
3570 || msg_action_arg > 0 && !one_msg_action
3572 || ( msg_action_arg > 0
3573 && ( f.daemon_listen || queue_interval > 0 || list_options
3574 || checking && msg_action != MSG_LOAD
3575 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3577 || ( (f.daemon_listen || queue_interval > 0)
3578 && ( sender_address || list_options || list_queue || checking
3581 || f.daemon_listen && queue_interval == 0
3582 || f.inetd_wait_mode && queue_interval >= 0
3584 && ( checking || smtp_input || extract_recipients
3585 || filter_test != FTEST_NONE || bi_option
3587 || ( verify_address_mode
3588 && ( f.address_test_mode || smtp_input || extract_recipients
3589 || filter_test != FTEST_NONE || bi_option
3591 || ( f.address_test_mode
3592 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3596 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3598 || deliver_selectstring && queue_interval < 0
3599 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3601 exim_fail("exim: incompatible command-line options or arguments\n");
3603 /* If debugging is set up, set the file and the file descriptor to pass on to
3604 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3605 to run in the foreground. */
3607 if (debug_selector != 0)
3609 debug_file = stderr;
3610 debug_fd = fileno(debug_file);
3611 f.background_daemon = FALSE;
3612 testharness_pause_ms(100); /* lets caller finish */
3613 if (debug_selector != D_v) /* -v only doesn't show this */
3615 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3616 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3618 if (!version_printed)
3619 show_whats_supported(stderr);
3623 /* When started with root privilege, ensure that the limits on the number of
3624 open files and the number of processes (where that is accessible) are
3625 sufficiently large, or are unset, in case Exim has been called from an
3626 environment where the limits are screwed down. Not all OS have the ability to
3627 change some of these limits. */
3631 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3637 #ifdef RLIMIT_NOFILE
3638 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3640 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3642 rlp.rlim_cur = rlp.rlim_max = 0;
3645 /* I originally chose 1000 as a nice big number that was unlikely to
3646 be exceeded. It turns out that some older OS have a fixed upper limit of
3649 if (rlp.rlim_cur < 1000)
3651 rlp.rlim_cur = rlp.rlim_max = 1000;
3652 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3654 rlp.rlim_cur = rlp.rlim_max = 256;
3655 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3656 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3663 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3665 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3667 rlp.rlim_cur = rlp.rlim_max = 0;
3670 #ifdef RLIM_INFINITY
3671 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3673 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3675 if (rlp.rlim_cur < 1000)
3677 rlp.rlim_cur = rlp.rlim_max = 1000;
3679 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3680 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3686 /* Exim is normally entered as root (but some special configurations are
3687 possible that don't do this). However, it always spins off sub-processes that
3688 set their uid and gid as required for local delivery. We don't want to pass on
3689 any extra groups that root may belong to, so we want to get rid of them all at
3692 We need to obey setgroups() at this stage, before possibly giving up root
3693 privilege for a changed configuration file, but later on we might need to
3694 check on the additional groups for the admin user privilege - can't do that
3695 till after reading the config, which might specify the exim gid. Therefore,
3696 save the group list here first. */
3698 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3699 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3701 /* There is a fundamental difference in some BSD systems in the matter of
3702 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3703 known not to be different. On the "different" systems there is a single group
3704 list, and the first entry in it is the current group. On all other versions of
3705 Unix there is a supplementary group list, which is in *addition* to the current
3706 group. Consequently, to get rid of all extraneous groups on a "standard" system
3707 you pass over 0 groups to setgroups(), while on a "different" system you pass
3708 over a single group - the current group, which is always the first group in the
3709 list. Calling setgroups() with zero groups on a "different" system results in
3710 an error return. The following code should cope with both types of system.
3712 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3713 the "setgroups() with zero groups" - and changes the egid.
3714 Thanks to that we had to stash the original_egid above, for use below
3715 in the call to exim_setugid().
3717 However, if this process isn't running as root, setgroups() can't be used
3718 since you have to be root to run it, even if throwing away groups.
3719 Except, sigh, for Hurd - where you can.
3720 Not being root here happens only in some unusual configurations. */
3723 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3724 && setgroups(0, NULL) != 0
3726 && setgroups(1, group_list) != 0)
3727 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3729 /* If the configuration file name has been altered by an argument on the
3730 command line (either a new file name or a macro definition) and the caller is
3731 not root, or if this is a filter testing run, remove any setuid privilege the
3732 program has and run as the underlying user.
3734 The exim user is locked out of this, which severely restricts the use of -C
3737 Otherwise, set the real ids to the effective values (should be root unless run
3738 from inetd, which it can either be root or the exim uid, if one is configured).
3740 There is a private mechanism for bypassing some of this, in order to make it
3741 possible to test lots of configurations automatically, without having either to
3742 recompile each time, or to patch in an actual configuration file name and other
3743 values (such as the path name). If running in the test harness, pretend that
3744 configuration file changes and macro definitions haven't happened. */
3747 (!f.trusted_config || /* Config changed, or */
3748 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3749 real_uid != root_uid && /* Not root, and */
3750 !f.running_in_test_harness /* Not fudged */
3752 expansion_test /* expansion testing */
3754 filter_test != FTEST_NONE) /* Filter testing */
3756 setgroups(group_count, group_list);
3757 exim_setugid(real_uid, real_gid, FALSE,
3758 US"-C, -D, -be or -bf forces real uid");
3759 removed_privilege = TRUE;
3761 /* In the normal case when Exim is called like this, stderr is available
3762 and should be used for any logging information because attempts to write
3763 to the log will usually fail. To arrange this, we unset really_exim. However,
3764 if no stderr is available there is no point - we might as well have a go
3765 at the log (if it fails, syslog will be written).
3767 Note that if the invoker is Exim, the logs remain available. Messing with
3768 this causes unlogged successful deliveries. */
3770 if (log_stderr && real_uid != exim_uid)
3771 f.really_exim = FALSE;
3774 /* Privilege is to be retained for the moment. It may be dropped later,
3775 depending on the job that this Exim process has been asked to do. For now, set
3776 the real uid to the effective so that subsequent re-execs of Exim are done by a
3780 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3782 /* If testing a filter, open the file(s) now, before wasting time doing other
3783 setups and reading the message. */
3785 if (filter_test & FTEST_SYSTEM)
3786 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3787 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3790 if (filter_test & FTEST_USER)
3791 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3792 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3795 /* Initialise lookup_list
3796 If debugging, already called above via version reporting.
3797 In either case, we initialise the list of available lookups while running
3798 as root. All dynamically modules are loaded from a directory which is
3799 hard-coded into the binary and is code which, if not a module, would be
3800 part of Exim already. Ability to modify the content of the directory
3801 is equivalent to the ability to modify a setuid binary!
3803 This needs to happen before we read the main configuration. */
3807 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3810 /* Read the main runtime configuration data; this gives up if there
3811 is a failure. It leaves the configuration file open so that the subsequent
3812 configuration data for delivery can be read if needed.
3814 NOTE: immediately after opening the configuration file we change the working
3815 directory to "/"! Later we change to $spool_directory. We do it there, because
3816 during readconf_main() some expansion takes place already. */
3818 /* Store the initial cwd before we change directories. Can be NULL if the
3819 dir has already been unlinked. */
3820 initial_cwd = os_getcwd(NULL, 0);
3823 -be[m] expansion test -
3824 -b[fF] filter test new
3826 -bmalware malware_test_file new
3828 -brw rewrite test new
3830 -bv[s] address verify -
3832 -bP <option> (except -bP config, which sets list_config)
3834 If any of these options is set, we suppress warnings about configuration
3835 issues (currently about tls_advertise_hosts and keep_environment not being
3839 #ifdef MEASURE_TIMING
3840 struct timeval t0, diff;
3841 (void)gettimeofday(&t0, NULL);
3844 readconf_main(checking || list_options);
3846 #ifdef MEASURE_TIMING
3847 report_time_since(&t0, US"readconf_main (delta)");
3852 /* Now in directory "/" */
3854 if (cleanup_environment() == FALSE)
3855 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3858 /* If an action on specific messages is requested, or if a daemon or queue
3859 runner is being started, we need to know if Exim was called by an admin user.
3860 This is the case if the real user is root or exim, or if the real group is
3861 exim, or if one of the supplementary groups is exim or a group listed in
3862 admin_groups. We don't fail all message actions immediately if not admin_user,
3863 since some actions can be performed by non-admin users. Instead, set admin_user
3864 for later interrogation. */
3866 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3867 f.admin_user = TRUE;
3869 for (int i = 0; i < group_count && !f.admin_user; i++)
3870 if (group_list[i] == exim_gid)
3871 f.admin_user = TRUE;
3872 else if (admin_groups)
3873 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3874 if (admin_groups[j] == group_list[i])
3875 f.admin_user = TRUE;
3877 /* Another group of privileged users are the trusted users. These are root,
3878 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3879 are permitted to specify sender_addresses with -f on the command line, and
3880 other message parameters as well. */
3882 if (real_uid == root_uid || real_uid == exim_uid)
3883 f.trusted_caller = TRUE;
3887 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3888 if (trusted_users[i] == real_uid)
3889 f.trusted_caller = TRUE;
3892 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3893 if (trusted_groups[i] == real_gid)
3894 f.trusted_caller = TRUE;
3895 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3896 if (trusted_groups[i] == group_list[j])
3897 f.trusted_caller = TRUE;
3900 /* At this point, we know if the user is privileged and some command-line
3901 options become possibly impermissible, depending upon the configuration file. */
3903 if (checking && commandline_checks_require_admin && !f.admin_user)
3904 exim_fail("exim: those command-line flags are set to require admin\n");
3906 /* Handle the decoding of logging options. */
3908 decode_bits(log_selector, log_selector_size, log_notall,
3909 log_selector_string, log_options, log_options_count, US"log", 0);
3913 debug_printf("configuration file is %s\n", config_main_filename);
3914 debug_printf("log selectors =");
3915 for (int i = 0; i < log_selector_size; i++)
3916 debug_printf(" %08x", log_selector[i]);
3920 /* If domain literals are not allowed, check the sender address that was
3921 supplied with -f. Ditto for a stripped trailing dot. */
3925 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3926 exim_fail("exim: bad -f address \"%s\": domain literals not "
3927 "allowed\n", sender_address);
3928 if (f_end_dot && !strip_trailing_dot)
3929 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3930 "(trailing dot not allowed)\n", sender_address);
3933 /* See if an admin user overrode our logging. */
3935 if (cmdline_syslog_name)
3938 syslog_processname = cmdline_syslog_name;
3939 log_file_path = string_copy(CUS"syslog");
3942 /* not a panic, non-privileged users should not be able to spam paniclog */
3944 "exim: you lack sufficient privilege to specify syslog process name\n");
3946 /* Paranoia check of maximum lengths of certain strings. There is a check
3947 on the length of the log file path in log.c, which will come into effect
3948 if there are any calls to write the log earlier than this. However, if we
3949 get this far but the string is very long, it is better to stop now than to
3950 carry on and (e.g.) receive a message and then have to collapse. The call to
3951 log_write() from here will cause the ultimate panic collapse if the complete
3952 file name exceeds the buffer length. */
3954 if (Ustrlen(log_file_path) > 200)
3955 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3956 "log_file_path is longer than 200 chars: aborting");
3958 if (Ustrlen(pid_file_path) > 200)
3959 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3960 "pid_file_path is longer than 200 chars: aborting");
3962 if (Ustrlen(spool_directory) > 200)
3963 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3964 "spool_directory is longer than 200 chars: aborting");
3966 /* Length check on the process name given to syslog for its TAG field,
3967 which is only permitted to be 32 characters or less. See RFC 3164. */
3969 if (Ustrlen(syslog_processname) > 32)
3970 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3971 "syslog_processname is longer than 32 chars: aborting");
3976 log_write(0, LOG_MAIN, "%s", log_oneline);
3977 return EXIT_SUCCESS;
3980 return EXIT_FAILURE;
3982 /* In some operating systems, the environment variable TMPDIR controls where
3983 temporary files are created; Exim doesn't use these (apart from when delivering
3984 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3985 If TMPDIR is found in the environment, reset it to the value defined in the
3986 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3987 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3988 EXIM_TMPDIR by the build scripts.
3992 if (environ) for (uschar ** p = USS environ; *p; p++)
3993 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3995 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3996 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3998 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4002 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4003 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4004 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4005 called by a user who has set the TZ variable. This then affects the timestamps
4006 in log files and in Received: headers, and any created Date: header lines. The
4007 required timezone is settable in the configuration file, so nothing can be done
4008 about this earlier - but hopefully nothing will normally be logged earlier than
4009 this. We have to make a new environment if TZ is wrong, but don't bother if
4010 timestamps_utc is set, because then all times are in UTC anyway. */
4012 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4013 f.timestamps_utc = TRUE;
4016 uschar *envtz = US getenv("TZ");
4018 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4019 : timezone_string != NULL
4022 uschar **p = USS environ;
4026 if (environ) while (*p++) count++;
4027 if (!envtz) count++;
4028 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4029 if (environ) for (p = USS environ; *p; p++)
4030 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4031 if (timezone_string)
4033 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4034 sprintf(CS *newp++, "TZ=%s", timezone_string);
4039 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4040 tod_stamp(tod_log));
4044 /* Handle the case when we have removed the setuid privilege because of -C or
4045 -D. This means that the caller of Exim was not root.
4047 There is a problem if we were running as the Exim user. The sysadmin may
4048 expect this case to retain privilege because "the binary was called by the
4049 Exim user", but it hasn't, because either the -D option set macros, or the
4050 -C option set a non-trusted configuration file. There are two possibilities:
4052 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4053 to do message deliveries. Thus, the fact that it is running as a
4054 non-privileged user is plausible, and might be wanted in some special
4055 configurations. However, really_exim will have been set false when
4056 privilege was dropped, to stop Exim trying to write to its normal log
4057 files. Therefore, re-enable normal log processing, assuming the sysadmin
4058 has set up the log directory correctly.
4060 (2) If deliver_drop_privilege is not set, the configuration won't work as
4061 apparently intended, and so we log a panic message. In order to retain
4062 root for -C or -D, the caller must either be root or be invoking a
4063 trusted configuration file (when deliver_drop_privilege is false). */
4065 if ( removed_privilege
4066 && (!f.trusted_config || opt_D_used)
4067 && real_uid == exim_uid)
4068 if (deliver_drop_privilege)
4069 f.really_exim = TRUE; /* let logging work normally */
4071 log_write(0, LOG_MAIN|LOG_PANIC,
4072 "exim user lost privilege for using %s option",
4073 f.trusted_config? "-D" : "-C");
4075 /* Start up Perl interpreter if Perl support is configured and there is a
4076 perl_startup option, and the configuration or the command line specifies
4077 initializing starting. Note that the global variables are actually called
4078 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4081 if (perl_start_option != 0)
4082 opt_perl_at_start = (perl_start_option > 0);
4083 if (opt_perl_at_start && opt_perl_startup != NULL)
4086 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4087 if ((errstr = init_perl(opt_perl_startup)))
4088 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4089 opt_perl_started = TRUE;
4091 #endif /* EXIM_PERL */
4093 /* Log the arguments of the call if the configuration file said so. This is
4094 a debugging feature for finding out what arguments certain MUAs actually use.
4095 Don't attempt it if logging is disabled, or if listing variables or if
4096 verifying/testing addresses or expansions. */
4098 if ( (debug_selector & D_any || LOGGING(arguments))
4099 && f.really_exim && !list_options && !checking)
4101 uschar *p = big_buffer;
4102 Ustrcpy(p, US"cwd= (failed)");
4108 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4109 p += 4 + Ustrlen(initial_cwd);
4110 /* in case p is near the end and we don't provide enough space for
4111 * string_format to be willing to write. */
4115 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4117 for (int i = 0; i < argc; i++)
4119 int len = Ustrlen(argv[i]);
4120 const uschar *printing;
4122 if (p + len + 8 >= big_buffer + big_buffer_size)
4124 Ustrcpy(p, US" ...");
4125 log_write(0, LOG_MAIN, "%s", big_buffer);
4126 Ustrcpy(big_buffer, US"...");
4129 printing = string_printing(argv[i]);
4130 if (!*printing) quote = US"\"";
4133 const uschar *pp = printing;
4135 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4137 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4138 (p - big_buffer) - 4), printing, quote);
4141 if (LOGGING(arguments))
4142 log_write(0, LOG_MAIN, "%s", big_buffer);
4144 debug_printf("%s\n", big_buffer);
4147 /* Set the working directory to be the top-level spool directory. We don't rely
4148 on this in the code, which always uses fully qualified names, but it's useful
4149 for core dumps etc. Don't complain if it fails - the spool directory might not
4150 be generally accessible and calls with the -C option (and others) have lost
4151 privilege by now. Before the chdir, we try to ensure that the directory exists.
4154 if (Uchdir(spool_directory) != 0)
4156 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4157 (void) Uchdir(spool_directory);
4160 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4161 alias file. Exim doesn't have such a concept, but this call is screwed into
4162 Sun's YP makefiles. Handle this by calling a configured script, as the real
4163 user who called Exim. The -oA option can be used to pass an argument to the
4168 (void) fclose(config_file);
4169 if (bi_command && *bi_command)
4173 argv[i++] = bi_command;
4174 if (alias_arg) argv[i++] = alias_arg;
4177 setgroups(group_count, group_list);
4178 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4180 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4181 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4183 execv(CS argv[0], (char *const *)argv);
4184 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4188 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4193 /* We moved the admin/trusted check to be immediately after reading the
4194 configuration file. We leave these prints here to ensure that syslog setup,
4195 logfile setup, and so on has already happened. */
4197 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4198 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4200 /* Only an admin user may start the daemon or force a queue run in the default
4201 configuration, but the queue run restriction can be relaxed. Only an admin
4202 user may request that a message be returned to its sender forthwith. Only an
4203 admin user may specify a debug level greater than D_v (because it might show
4204 passwords, etc. in lookup queries). Only an admin user may request a queue
4205 count. Only an admin user can use the test interface to scan for email
4206 (because Exim will be in the spool dir and able to look at mails). */
4210 BOOL debugset = (debug_selector & ~D_v) != 0;
4211 if ( deliver_give_up || f.daemon_listen || malware_test_file
4212 || count_queue && queue_list_requires_admin
4213 || list_queue && queue_list_requires_admin
4214 || queue_interval >= 0 && prod_requires_admin
4215 || queue_name_dest && prod_requires_admin
4216 || debugset && !f.running_in_test_harness
4218 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4221 /* If the real user is not root or the exim uid, the argument for passing
4222 in an open TCP/IP connection for another message is not permitted, nor is
4223 running with the -N option for any delivery action, unless this call to exim is
4224 one that supplied an input message, or we are using a patched exim for
4225 regression testing. */
4227 if ( real_uid != root_uid && real_uid != exim_uid
4228 && ( continue_hostname
4230 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4232 && !f.running_in_test_harness
4234 exim_fail("exim: Permission denied\n");
4236 /* If the caller is not trusted, certain arguments are ignored when running for
4237 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4238 Note that authority for performing certain actions on messages is tested in the
4239 queue_action() function. */
4241 if (!f.trusted_caller && !checking)
4243 sender_host_name = sender_host_address = interface_address =
4244 sender_ident = received_protocol = NULL;
4245 sender_host_port = interface_port = 0;
4246 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4249 /* If a sender host address is set, extract the optional port number off the
4250 end of it and check its syntax. Do the same thing for the interface address.
4251 Exim exits if the syntax is bad. */
4255 if (sender_host_address)
4256 sender_host_port = check_port(sender_host_address);
4257 if (interface_address)
4258 interface_port = check_port(interface_address);
4261 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4264 if (f.trusted_caller)
4266 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4267 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4270 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4273 /* If an SMTP message is being received check to see if the standard input is a
4274 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4275 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4280 union sockaddr_46 inetd_sock;
4281 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4282 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4284 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4285 if (family == AF_INET || family == AF_INET6)
4287 union sockaddr_46 interface_sock;
4288 size = sizeof(interface_sock);
4290 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4291 interface_address = host_ntoa(-1, &interface_sock, NULL,
4294 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4296 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4299 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4300 NULL, &sender_host_port);
4301 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4302 "inetd is not supported when mua_wrapper is set");
4306 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4311 /* If the load average is going to be needed while receiving a message, get it
4312 now for those OS that require the first call to os_getloadavg() to be done as
4313 root. There will be further calls later for each message received. */
4315 #ifdef LOAD_AVG_NEEDS_ROOT
4316 if ( receiving_message
4317 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4318 load_average = OS_GETLOADAVG();
4321 /* The queue_only configuration option can be overridden by -odx on the command
4322 line, except that if queue_only_override is false, queue_only cannot be unset
4323 from the command line. */
4325 if (queue_only_set && (queue_only_override || arg_queue_only))
4326 queue_only = arg_queue_only;
4328 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4331 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4332 if (arg_smtp_receive_timeout >= 0)
4333 smtp_receive_timeout = arg_smtp_receive_timeout;
4335 /* If Exim was started with root privilege, unless we have already removed the
4336 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4337 except when starting the daemon or doing some kind of delivery or address
4338 testing (-bt). These are the only cases when root need to be retained. We run
4339 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4340 retained only for starting the daemon. We always do the initgroups() in this
4341 situation (controlled by the TRUE below), in order to be as close as possible
4342 to the state Exim usually runs in. */
4344 if ( !unprivileged /* originally had root AND */
4345 && !removed_privilege /* still got root AND */
4346 && !f.daemon_listen /* not starting the daemon */
4347 && queue_interval <= 0 /* (either kind of daemon) */
4348 && ( /* AND EITHER */
4349 deliver_drop_privilege /* requested unprivileged */
4351 queue_interval < 0 /* not running the queue */
4352 && ( msg_action_arg < 0 /* and */
4353 || msg_action != MSG_DELIVER /* not delivering */
4355 && (!checking || !f.address_test_mode) /* not address checking */
4356 && !rcpt_verify_quota /* and not quota checking */
4358 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4360 /* When we are retaining a privileged uid, we still change to the exim gid. */
4365 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4366 rv = setgid(exim_gid);
4367 /* Impact of failure is that some stuff might end up with an incorrect group.
4368 We track this for failures from root, since any attempt to change privilege
4369 by root should succeed and failures should be examined. For non-root,
4370 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4371 no need to complain then. */
4373 if (!(unprivileged || removed_privilege))
4374 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4377 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4378 (long int)exim_gid, strerror(errno));
4382 /* Handle a request to scan a file for malware */
4383 if (malware_test_file)
4385 #ifdef WITH_CONTENT_SCAN
4387 set_process_info("scanning file for malware");
4388 if ((result = malware_in_file(malware_test_file)) == FAIL)
4390 printf("No malware found.\n");
4395 printf("Malware lookup returned non-okay/fail: %d\n", result);
4399 printf("Malware found: %s\n", malware_name);
4401 printf("Malware scan detected malware of unknown name.\n");
4403 printf("Malware scanning not enabled at compile time.\n");
4408 /* Handle a request to list the delivery queue */
4412 set_process_info("listing the queue");
4413 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4417 /* Handle a request to count the delivery queue */
4421 set_process_info("counting the queue");
4422 fprintf(stdout, "%u\n", queue_count());
4426 /* Handle actions on specific messages, except for the force delivery and
4427 message load actions, which are done below. Some actions take a whole list of
4428 message ids, which are known to continue up to the end of the arguments. Others
4429 take a single message id and then operate on the recipients list. */
4431 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4433 int yield = EXIT_SUCCESS;
4434 set_process_info("acting on specified messages");
4436 /* ACL definitions may be needed when removing a message (-Mrm) because
4437 event_action gets expanded */
4439 if (msg_action == MSG_REMOVE)
4442 if (!one_msg_action)
4444 for (i = msg_action_arg; i < argc; i++)
4445 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4446 yield = EXIT_FAILURE;
4449 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4450 default: printf("\n"); break;
4454 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4455 recipients_arg)) yield = EXIT_FAILURE;
4459 /* We used to set up here to skip reading the ACL section, on
4460 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4461 Now, since the intro of the ${acl } expansion, ACL definitions may be
4462 needed in transports so we lost the optimisation. */
4465 #ifdef MEASURE_TIMING
4466 struct timeval t0, diff;
4467 (void)gettimeofday(&t0, NULL);
4472 #ifdef MEASURE_TIMING
4473 report_time_since(&t0, US"readconf_rest (delta)");
4477 /* Handle a request to check quota */
4478 if (rcpt_verify_quota)
4479 if (real_uid != root_uid && real_uid != exim_uid)
4480 exim_fail("exim: Permission denied\n");
4481 else if (recipients_arg >= argc)
4482 exim_fail("exim: missing recipient for quota check\n");
4485 verify_quota(argv[recipients_arg]);
4486 exim_exit(EXIT_SUCCESS);
4489 /* Handle the -brt option. This is for checking out retry configurations.
4490 The next three arguments are a domain name or a complete address, and
4491 optionally two error numbers. All it does is to call the function that
4492 scans the retry configuration data. */
4494 if (test_retry_arg >= 0)
4496 retry_config *yield;
4497 int basic_errno = 0;
4501 if (test_retry_arg >= argc)
4503 printf("-brt needs a domain or address argument\n");
4504 exim_exit(EXIT_FAILURE);
4506 s1 = argv[test_retry_arg++];
4509 /* If the first argument contains no @ and no . it might be a local user
4510 or it might be a single-component name. Treat as a domain. */
4512 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4514 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4515 "being \ntreated as a one-component domain, not as a local part.\n\n",
4519 /* There may be an optional second domain arg. */
4521 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4522 s2 = argv[test_retry_arg++];
4524 /* The final arg is an error name */
4526 if (test_retry_arg < argc)
4528 uschar *ss = argv[test_retry_arg];
4530 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4533 printf("%s\n", CS error);
4534 return EXIT_FAILURE;
4537 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4538 code > 100 as an error is for matching codes to the decade. Turn them into
4539 a real error code, off the decade. */
4541 if (basic_errno == ERRNO_MAIL4XX ||
4542 basic_errno == ERRNO_RCPT4XX ||
4543 basic_errno == ERRNO_DATA4XX)
4545 int code = (more_errno >> 8) & 255;
4547 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4548 else if (code > 100)
4549 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4553 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4554 printf("No retry information found\n");
4557 more_errno = yield->more_errno;
4558 printf("Retry rule: %s ", yield->pattern);
4560 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4562 printf("quota%s%s ",
4563 (more_errno > 0)? "_" : "",
4564 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4566 else if (yield->basic_errno == ECONNREFUSED)
4568 printf("refused%s%s ",
4569 (more_errno > 0)? "_" : "",
4570 (more_errno == 'M')? "MX" :
4571 (more_errno == 'A')? "A" : "");
4573 else if (yield->basic_errno == ETIMEDOUT)
4576 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4578 if (more_errno != 0) printf("_%s",
4579 (more_errno == 'M')? "MX" : "A");
4582 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4583 printf("auth_failed ");
4586 for (retry_rule * r = yield->rules; r; r = r->next)
4588 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4589 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4595 printf(",%d.", x/1000);
4609 exim_exit(EXIT_SUCCESS);
4612 /* Handle a request to list one or more configuration options */
4613 /* If -n was set, we suppress some information */
4618 set_process_info("listing variables");
4619 if (recipients_arg >= argc)
4620 fail = !readconf_print(US"all", NULL, flag_n);
4621 else for (i = recipients_arg; i < argc; i++)
4624 (Ustrcmp(argv[i], "router") == 0 ||
4625 Ustrcmp(argv[i], "transport") == 0 ||
4626 Ustrcmp(argv[i], "authenticator") == 0 ||
4627 Ustrcmp(argv[i], "macro") == 0 ||
4628 Ustrcmp(argv[i], "environment") == 0))
4630 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4634 fail = !readconf_print(argv[i], NULL, flag_n);
4636 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4641 set_process_info("listing config");
4642 exim_exit(readconf_print(US"config", NULL, flag_n)
4643 ? EXIT_SUCCESS : EXIT_FAILURE);
4647 /* Initialise subsystems as required. */
4651 /* Handle a request to deliver one or more messages that are already on the
4652 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4653 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4655 Delivery of specific messages is typically used for a small number when
4656 prodding by hand (when the option forced_delivery will be set) or when
4657 re-execing to regain root privilege. Each message delivery must happen in a
4658 separate process, so we fork a process for each one, and run them sequentially
4659 so that debugging output doesn't get intertwined, and to avoid spawning too
4660 many processes if a long list is given. However, don't fork for the last one;
4661 this saves a process in the common case when Exim is called to deliver just one
4664 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4666 if (prod_requires_admin && !f.admin_user)
4668 fprintf(stderr, "exim: Permission denied\n");
4669 exim_exit(EXIT_FAILURE);
4671 set_process_info("delivering specified messages");
4672 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4673 for (i = msg_action_arg; i < argc; i++)
4677 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4678 that runs into a later copy into the untainted global message_id[] */
4680 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4681 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4683 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4684 exim_underbar_exit(EXIT_SUCCESS);
4688 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4690 exim_exit(EXIT_FAILURE);
4694 exim_exit(EXIT_SUCCESS);
4698 /* If only a single queue run is requested, without SMTP listening, we can just
4699 turn into a queue runner, with an optional starting message id. */
4701 if (queue_interval == 0 && !f.daemon_listen)
4703 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4704 start_queue_run_id ? US" starting at " : US"",
4705 start_queue_run_id ? start_queue_run_id: US"",
4706 stop_queue_run_id ? US" stopping at " : US"",
4707 stop_queue_run_id ? stop_queue_run_id : US"");
4709 set_process_info("running the '%s' queue (single queue run)", queue_name);
4711 set_process_info("running the queue (single queue run)");
4712 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4713 exim_exit(EXIT_SUCCESS);
4717 /* Find the login name of the real user running this process. This is always
4718 needed when receiving a message, because it is written into the spool file. It
4719 may also be used to construct a from: or a sender: header, and in this case we
4720 need the user's full name as well, so save a copy of it, checked for RFC822
4721 syntax and munged if necessary, if it hasn't previously been set by the -F
4722 argument. We may try to get the passwd entry more than once, in case NIS or
4723 other delays are in evidence. Save the home directory for use in filter testing
4728 if ((pw = getpwuid(real_uid)) != NULL)
4730 originator_login = string_copy(US pw->pw_name);
4731 originator_home = string_copy(US pw->pw_dir);
4733 /* If user name has not been set by -F, set it from the passwd entry
4734 unless -f has been used to set the sender address by a trusted user. */
4736 if (!originator_name)
4738 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4740 uschar *name = US pw->pw_gecos;
4741 uschar *amp = Ustrchr(name, '&');
4744 /* Most Unix specify that a '&' character in the gecos field is
4745 replaced by a copy of the login name, and some even specify that
4746 the first character should be upper cased, so that's what we do. */
4751 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4752 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4753 buffer[loffset] = toupper(buffer[loffset]);
4757 /* If a pattern for matching the gecos field was supplied, apply
4758 it and then expand the name string. */
4760 if (gecos_pattern && gecos_name)
4763 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4765 if (regex_match_and_setup(re, name, 0, -1))
4767 uschar *new_name = expand_string(gecos_name);
4771 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4772 "gecos field \"%s\"\n", new_name, name);
4775 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4776 "\"%s\": %s\n", gecos_name, expand_string_message);
4778 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4779 "gecos field \"%s\"\n", gecos_pattern, name);
4780 store_free((void *)re);
4782 originator_name = string_copy(name);
4785 /* A trusted caller has used -f but not -F */
4787 else originator_name = US"";
4790 /* Break the retry loop */
4795 if (++i > finduser_retries) break;
4799 /* If we cannot get a user login, log the incident and give up, unless the
4800 configuration specifies something to use. When running in the test harness,
4801 any setting of unknown_login overrides the actual name. */
4803 if (!originator_login || f.running_in_test_harness)
4807 originator_login = expand_string(unknown_login);
4808 if (!originator_name && unknown_username)
4809 originator_name = expand_string(unknown_username);
4810 if (!originator_name) originator_name = US"";
4812 if (!originator_login)
4813 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4817 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4820 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4822 /* If a message is created by this call of Exim, the uid/gid of its originator
4823 are those of the caller. These values are overridden if an existing message is
4824 read in from the spool. */
4826 originator_uid = real_uid;
4827 originator_gid = real_gid;
4829 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4830 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4832 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4833 returns. We leave this till here so that the originator_ fields are available
4834 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4837 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4841 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4842 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4843 "mua_wrapper is set");
4846 # ifndef DISABLE_TLS
4847 /* This also checks that the library linkage is working and we can call
4848 routines in it, so call even if tls_require_ciphers is unset */
4850 # ifdef MEASURE_TIMING
4851 struct timeval t0, diff;
4852 (void)gettimeofday(&t0, NULL);
4854 if (!tls_dropprivs_validate_require_cipher(FALSE))
4856 # ifdef MEASURE_TIMING
4857 report_time_since(&t0, US"validate_ciphers (delta)");
4865 /* If the sender ident has not been set (by a trusted caller) set it to
4866 the caller. This will get overwritten below for an inetd call. If a trusted
4867 caller has set it empty, unset it. */
4869 if (!sender_ident) sender_ident = originator_login;
4870 else if (!*sender_ident) sender_ident = NULL;
4872 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4873 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4874 originator_* variables set. */
4876 if (test_rewrite_arg >= 0)
4878 f.really_exim = FALSE;
4879 if (test_rewrite_arg >= argc)
4881 printf("-brw needs an address argument\n");
4882 exim_exit(EXIT_FAILURE);
4884 rewrite_test(argv[test_rewrite_arg]);
4885 exim_exit(EXIT_SUCCESS);
4888 /* A locally-supplied message is considered to be coming from a local user
4889 unless a trusted caller supplies a sender address with -f, or is passing in the
4890 message via SMTP (inetd invocation or otherwise). */
4892 if ( !sender_address && !smtp_input
4893 || !f.trusted_caller && filter_test == FTEST_NONE)
4895 f.sender_local = TRUE;
4897 /* A trusted caller can supply authenticated_sender and authenticated_id
4898 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4899 defaults except when host checking. */
4901 if (!authenticated_sender && !host_checking)
4902 authenticated_sender = string_sprintf("%s@%s", originator_login,
4903 qualify_domain_sender);
4904 if (!authenticated_id && !host_checking)
4905 authenticated_id = originator_login;
4908 /* Trusted callers are always permitted to specify the sender address.
4909 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4910 is specified is the empty address. However, if a trusted caller does not
4911 specify a sender address for SMTP input, we leave sender_address unset. This
4912 causes the MAIL commands to be honoured. */
4914 if ( !smtp_input && !sender_address
4915 || !receive_check_set_sender(sender_address))
4917 /* Either the caller is not permitted to set a general sender, or this is
4918 non-SMTP input and the trusted caller has not set a sender. If there is no
4919 sender, or if a sender other than <> is set, override with the originator's
4920 login (which will get qualified below), except when checking things. */
4922 if ( !sender_address /* No sender_address set */
4924 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4925 !checking)) /* Not running tests, including filter tests */
4927 sender_address = originator_login;
4928 f.sender_address_forced = FALSE;
4929 sender_address_domain = 0;
4933 /* Remember whether an untrusted caller set the sender address */
4935 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4937 /* Ensure that the sender address is fully qualified unless it is the empty
4938 address, which indicates an error message, or doesn't exist (root caller, smtp
4939 interface, no -f argument). */
4941 if (sender_address && *sender_address && sender_address_domain == 0)
4942 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4943 qualify_domain_sender);
4945 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4947 /* Handle a request to verify a list of addresses, or test them for delivery.
4948 This must follow the setting of the sender address, since routers can be
4949 predicated upon the sender. If no arguments are given, read addresses from
4950 stdin. Set debug_level to at least D_v to get full output for address testing.
4953 if (verify_address_mode || f.address_test_mode)
4956 int flags = vopt_qualify;
4958 if (verify_address_mode)
4960 if (!verify_as_sender) flags |= vopt_is_recipient;
4961 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4966 flags |= vopt_is_recipient;
4967 debug_selector |= D_v;
4968 debug_file = stderr;
4969 debug_fd = fileno(debug_file);
4970 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4973 if (recipients_arg < argc)
4974 while (recipients_arg < argc)
4976 /* Supplied addresses are tainted since they come from a user */
4977 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4980 BOOL finished = FALSE;
4981 uschar *ss = parse_find_address_end(s, FALSE);
4982 if (*ss == ',') *ss = 0; else finished = TRUE;
4983 test_address(s, flags, &exit_value);
4986 while (*++s == ',' || isspace(*s)) ;
4992 uschar * s = get_stdinput(NULL, NULL);
4994 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4998 exim_exit(exit_value);
5001 /* Handle expansion checking. Either expand items on the command line, or read
5002 from stdin if there aren't any. If -Mset was specified, load the message so
5003 that its variables can be used, but restrict this facility to admin users.
5004 Otherwise, if -bem was used, read a message from stdin. */
5008 dns_init(FALSE, FALSE, FALSE);
5009 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5011 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
5013 exim_fail("exim: permission denied\n");
5014 message_id = argv[msg_action_arg];
5015 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
5016 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5017 printf ("Failed to load message datafile %s\n", message_id);
5018 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5019 printf ("Failed to load message %s\n", message_id);
5022 /* Read a test message from a file. We fudge it up to be on stdin, saving
5023 stdin itself for later reading of expansion strings. */
5025 else if (expansion_test_message)
5027 int save_stdin = dup(0);
5028 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5030 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5033 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5034 message_ended = END_NOTENDED;
5035 read_message_body(receive_msg(extract_recipients));
5036 message_linecount += body_linecount;
5037 (void)dup2(save_stdin, 0);
5038 (void)close(save_stdin);
5039 clearerr(stdin); /* Required by Darwin */
5042 /* Only admin users may see config-file macros this way */
5044 if (!f.admin_user) macros_user = macros = mlast = NULL;
5046 /* Allow $recipients for this testing */
5048 f.enable_dollar_recipients = TRUE;
5050 /* Expand command line items */
5052 if (recipients_arg < argc)
5053 while (recipients_arg < argc)
5054 expansion_test_line(argv[recipients_arg++]);
5060 char *(*fn_readline)(const char *) = NULL;
5061 void (*fn_addhist)(const char *) = NULL;
5065 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5068 while (s = get_stdinput(fn_readline, fn_addhist))
5069 expansion_test_line(s);
5072 if (dlhandle) dlclose(dlhandle);
5076 /* The data file will be open after -Mset */
5078 if (deliver_datafile >= 0)
5080 (void)close(deliver_datafile);
5081 deliver_datafile = -1;
5084 exim_exit(EXIT_SUCCESS);
5088 /* The active host name is normally the primary host name, but it can be varied
5089 for hosts that want to play several parts at once. We need to ensure that it is
5090 set for host checking, and for receiving messages. */
5092 smtp_active_hostname = primary_hostname;
5093 if (raw_active_hostname != NULL)
5095 uschar *nah = expand_string(raw_active_hostname);
5098 if (!f.expand_string_forcedfail)
5099 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5100 "(smtp_active_hostname): %s", raw_active_hostname,
5101 expand_string_message);
5103 else if (nah[0] != 0) smtp_active_hostname = nah;
5106 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5107 given IP address so that the blocking and relay configuration can be tested.
5108 Unless a sender_ident was set by -oMt, we discard it (the default is the
5109 caller's login name). An RFC 1413 call is made only if we are running in the
5110 test harness and an incoming interface and both ports are specified, because
5111 there is no TCP/IP call to find the ident for. */
5118 if (!sender_ident_set)
5120 sender_ident = NULL;
5121 if (f.running_in_test_harness && sender_host_port
5122 && interface_address && interface_port)
5123 verify_get_ident(1223); /* note hardwired port number */
5126 /* In case the given address is a non-canonical IPv6 address, canonicalize
5127 it. The code works for both IPv4 and IPv6, as it happens. */
5129 size = host_aton(sender_host_address, x);
5130 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5131 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5133 /* Now set up for testing */
5135 host_build_sender_fullhost();
5139 f.sender_local = FALSE;
5140 f.sender_host_notsocket = TRUE;
5141 debug_file = stderr;
5142 debug_fd = fileno(debug_file);
5143 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5144 "**** but without any ident (RFC 1413) callback.\n"
5145 "**** This is not for real!\n\n",
5146 sender_host_address);
5148 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5149 if (verify_check_host(&hosts_connection_nolog) == OK)
5150 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5151 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5153 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5154 because a log line has already been written for all its failure exists
5155 (usually "connection refused: <reason>") and writing another one is
5156 unnecessary clutter. */
5158 if (smtp_start_session())
5161 for (; (reset_point = store_mark()); store_reset(reset_point))
5163 if (smtp_setup_msg() <= 0) break;
5164 if (!receive_msg(FALSE)) break;
5166 return_path = sender_address = NULL;
5167 dnslist_domain = dnslist_matched = NULL;
5168 #ifndef DISABLE_DKIM
5169 dkim_cur_signer = NULL;
5172 deliver_localpart_orig = NULL;
5173 deliver_domain_orig = NULL;
5174 callout_address = sending_ip_address = NULL;
5175 deliver_localpart_data = deliver_domain_data =
5176 recipient_data = sender_data = NULL;
5177 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5181 exim_exit(EXIT_SUCCESS);
5185 /* Arrange for message reception if recipients or SMTP were specified;
5186 otherwise complain unless a version print (-bV) happened or this is a filter
5187 verification test or info dump.
5188 In the former case, show the configuration file name. */
5190 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5192 if (version_printed)
5194 if (Ustrchr(config_main_filelist, ':'))
5195 printf("Configuration file search path is %s\n", config_main_filelist);
5196 printf("Configuration file is %s\n", config_main_filename);
5197 return EXIT_SUCCESS;
5200 if (info_flag != CMDINFO_NONE)
5202 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5203 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5206 if (filter_test == FTEST_NONE)
5207 exim_usage(called_as);
5211 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5212 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5213 that we are not called from inetd, because that is rejected above. The
5214 following configuration settings are forced here:
5216 (1) Synchronous delivery (-odi)
5217 (2) Errors to stderr (-oep == -oeq)
5218 (3) No parallel remote delivery
5219 (4) Unprivileged delivery
5221 We don't force overall queueing options because there are several of them;
5222 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5223 to override any SMTP queueing. */
5227 f.synchronous_delivery = TRUE;
5228 arg_error_handling = ERRORS_STDERR;
5229 remote_max_parallel = 1;
5230 deliver_drop_privilege = TRUE;
5231 f.queue_smtp = FALSE;
5232 queue_smtp_domains = NULL;
5234 message_utf8_downconvert = -1; /* convert-if-needed */
5239 /* Prepare to accept one or more new messages on the standard input. When a
5240 message has been read, its id is returned in message_id[]. If doing immediate
5241 delivery, we fork a delivery process for each received message, except for the
5242 last one, where we can save a process switch.
5244 It is only in non-smtp mode that error_handling is allowed to be changed from
5245 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5246 sendmail error modes other than -oem ever actually used? Later: yes.) */
5248 if (!smtp_input) error_handling = arg_error_handling;
5250 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5251 logging being sent down the socket and make an identd call to get the
5254 else if (f.is_inetd)
5256 (void)fclose(stderr);
5257 exim_nullstd(); /* Re-open to /dev/null */
5258 verify_get_ident(IDENT_PORT);
5259 host_build_sender_fullhost();
5260 set_process_info("handling incoming connection from %s via inetd",
5264 /* If the sender host address has been set, build sender_fullhost if it hasn't
5265 already been done (which it will have been for inetd). This caters for the
5266 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5267 so that the test for IP options is skipped for -bs input. */
5269 if (sender_host_address && !sender_fullhost)
5271 host_build_sender_fullhost();
5272 set_process_info("handling incoming connection from %s via -oMa",
5274 f.sender_host_notsocket = TRUE;
5277 /* Otherwise, set the sender host as unknown except for inetd calls. This
5278 prevents host checking in the case of -bs not from inetd and also for -bS. */
5280 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5282 /* If stdout does not exist, then dup stdin to stdout. This can happen
5283 if exim is started from inetd. In this case fd 0 will be set to the socket,
5284 but fd 1 will not be set. This also happens for passed SMTP channels. */
5286 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5288 /* Set up the incoming protocol name and the state of the program. Root is
5289 allowed to force received protocol via the -oMr option above. If we have come
5290 via inetd, the process info has already been set up. We don't set
5291 received_protocol here for smtp input, as it varies according to
5292 batch/HELO/EHLO/AUTH/TLS. */
5296 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5297 smtp_batched_input? "batched " : "",
5298 (sender_address!= NULL)? sender_address : originator_login);
5302 int old_pool = store_pool;
5303 store_pool = POOL_PERM;
5304 if (!received_protocol)
5305 received_protocol = string_sprintf("local%s", called_as);
5306 store_pool = old_pool;
5307 set_process_info("accepting a local non-SMTP message from <%s>",
5311 /* Initialize the session_local_queue-only flag (this will be ignored if
5312 mua_wrapper is set) */
5315 session_local_queue_only = queue_only;
5317 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5318 the spool if so configured. On failure, we must not attempt to send an error
5319 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5320 error code is given.) */
5322 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5323 exim_fail("exim: insufficient disk space\n");
5325 /* If this is smtp input of any kind, real or batched, handle the start of the
5328 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5329 because a log line has already been written for all its failure exists
5330 (usually "connection refused: <reason>") and writing another one is
5331 unnecessary clutter. */
5337 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5338 if (verify_check_host(&hosts_connection_nolog) == OK)
5339 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5340 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5341 if (!smtp_start_session())
5344 exim_exit(EXIT_SUCCESS);
5348 /* Otherwise, set up the input size limit here. */
5352 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5353 if (expand_string_message)
5354 if (thismessage_size_limit == -1)
5355 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5356 "message_size_limit: %s", expand_string_message);
5358 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5359 "message_size_limit: %s", expand_string_message);
5362 /* Loop for several messages when reading SMTP input. If we fork any child
5363 processes, we don't want to wait for them unless synchronous delivery is
5364 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5365 same as SIG_DFL, despite the fact that documentation often lists the default as
5366 "ignore". This is a confusing area. This is what I know:
5368 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5369 processes that complete simply to go away without ever becoming defunct. You
5370 can't then wait for them - but we don't want to wait for them in the
5371 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5372 happen for all OS (e.g. *BSD is different).
5374 But that's not the end of the story. Some (many? all?) systems have the
5375 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5376 has by default, so it seems that the difference is merely one of default
5377 (compare restarting vs non-restarting signals).
5379 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5380 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5381 of the loop below. Paranoia rules.
5383 February 2003: That's *still* not the end of the story. There are now versions
5384 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5385 process then calls waitpid(), a grumble is written to the system log, because
5386 this is logically inconsistent. In other words, it doesn't like the paranoia.
5387 As a consequence of this, the waitpid() below is now excluded if we are sure
5388 that SIG_IGN works. */
5390 if (!f.synchronous_delivery)
5393 struct sigaction act;
5394 act.sa_handler = SIG_IGN;
5395 sigemptyset(&(act.sa_mask));
5396 act.sa_flags = SA_NOCLDWAIT;
5397 sigaction(SIGCHLD, &act, NULL);
5399 signal(SIGCHLD, SIG_IGN);
5403 /* Save the current store pool point, for resetting at the start of
5404 each message, and save the real sender address, if any. */
5406 real_sender_address = sender_address;
5408 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5409 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5414 rmark reset_point = store_mark();
5417 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5418 input and build the recipients list, before calling receive_msg() to read the
5419 message proper. Whatever sender address is given in the SMTP transaction is
5420 often ignored for local senders - we use the actual sender, which is normally
5421 either the underlying user running this process or a -f argument provided by
5422 a trusted caller. It is saved in real_sender_address. The test for whether to
5423 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5428 if ((rc = smtp_setup_msg()) > 0)
5430 if (real_sender_address != NULL &&
5431 !receive_check_set_sender(sender_address))
5433 sender_address = raw_sender = real_sender_address;
5434 sender_address_unrewritten = NULL;
5437 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5438 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5439 the very end. The result of the ACL is ignored (as for other non-SMTP
5440 messages). It is run for its potential side effects. */
5442 if (smtp_batched_input && acl_not_smtp_start != NULL)
5444 uschar *user_msg, *log_msg;
5445 f.enable_dollar_recipients = TRUE;
5446 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5447 &user_msg, &log_msg);
5448 f.enable_dollar_recipients = FALSE;
5451 /* Now get the data for the message */
5453 more = receive_msg(extract_recipients);
5454 if (message_id[0] == 0)
5456 cancel_cutthrough_connection(TRUE, US"receive dropped");
5457 if (more) goto moreloop;
5458 smtp_log_no_mail(); /* Log no mail if configured */
5459 exim_exit(EXIT_FAILURE);
5464 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5465 smtp_log_no_mail(); /* Log no mail if configured */
5466 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5470 /* In the non-SMTP case, we have all the information from the command
5471 line, but must process it in case it is in the more general RFC822
5472 format, and in any case, to detect syntax errors. Also, it appears that
5473 the use of comma-separated lists as single arguments is common, so we
5474 had better support them. */
5479 int count = argc - recipients_arg;
5480 uschar **list = argv + recipients_arg;
5482 /* These options cannot be changed dynamically for non-SMTP messages */
5484 f.active_local_sender_retain = local_sender_retain;
5485 f.active_local_from_check = local_from_check;
5487 /* Save before any rewriting */
5489 raw_sender = string_copy(sender_address);
5491 /* Loop for each argument (supplied by user hence tainted) */
5493 for (int i = 0; i < count; i++)
5495 int start, end, domain;
5497 uschar * s = string_copy_taint(list[i], TRUE);
5499 /* Loop for each comma-separated address */
5503 BOOL finished = FALSE;
5505 uschar *ss = parse_find_address_end(s, FALSE);
5507 if (*ss == ',') *ss = 0; else finished = TRUE;
5509 /* Check max recipients - if -t was used, these aren't recipients */
5511 if (recipients_max > 0 && ++rcount > recipients_max &&
5512 !extract_recipients)
5513 if (error_handling == ERRORS_STDERR)
5515 fprintf(stderr, "exim: too many recipients\n");
5516 exim_exit(EXIT_FAILURE);
5520 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5521 errors_sender_rc : EXIT_FAILURE;
5525 BOOL b = allow_utf8_domains;
5526 allow_utf8_domains = TRUE;
5529 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5532 if (string_is_utf8(recipient))
5533 message_smtputf8 = TRUE;
5535 allow_utf8_domains = b;
5538 if (domain == 0 && !f.allow_unqualified_recipient)
5541 errmess = US"unqualified recipient address not allowed";
5545 if (error_handling == ERRORS_STDERR)
5547 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5548 string_printing(list[i]), errmess);
5549 exim_exit(EXIT_FAILURE);
5555 eblock.text1 = string_printing(list[i]);
5556 eblock.text2 = errmess;
5558 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5559 errors_sender_rc : EXIT_FAILURE;
5562 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5565 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5569 /* Show the recipients when debugging */
5573 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5574 if (recipients_list)
5576 debug_printf("Recipients:\n");
5577 for (int i = 0; i < recipients_count; i++)
5578 debug_printf(" %s\n", recipients_list[i].address);
5582 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5583 ignored; rejecting here would just add complication, and it can just as
5584 well be done later. Allow $recipients to be visible in the ACL. */
5586 if (acl_not_smtp_start)
5588 uschar *user_msg, *log_msg;
5589 f.enable_dollar_recipients = TRUE;
5590 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5591 &user_msg, &log_msg);
5592 f.enable_dollar_recipients = FALSE;
5595 /* Pause for a while waiting for input. If none received in that time,
5596 close the logfile, if we had one open; then if we wait for a long-running
5597 datasource (months, in one use-case) log rotation will not leave us holding
5600 if (!receive_timeout)
5602 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5605 FD_ZERO(&r); FD_SET(0, &r);
5606 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5609 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5610 will just read the headers for the message, and not write anything onto the
5613 message_ended = END_NOTENDED;
5614 more = receive_msg(extract_recipients);
5616 /* more is always FALSE here (not SMTP message) when reading a message
5617 for real; when reading the headers of a message for filter testing,
5618 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5620 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5621 } /* Non-SMTP message reception */
5623 /* If this is a filter testing run, there are headers in store, but
5624 no message on the spool. Run the filtering code in testing mode, setting
5625 the domain to the qualify domain and the local part to the current user,
5626 unless they have been set by options. The prefix and suffix are left unset
5627 unless specified. The the return path is set to to the sender unless it has
5628 already been set from a return-path header in the message. */
5630 if (filter_test != FTEST_NONE)
5632 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5633 deliver_domain_orig = deliver_domain;
5634 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5635 deliver_localpart_orig = deliver_localpart;
5636 deliver_localpart_prefix = ftest_prefix;
5637 deliver_localpart_suffix = ftest_suffix;
5638 deliver_home = originator_home;
5642 printf("Return-path copied from sender\n");
5643 return_path = string_copy(sender_address);
5646 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5647 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5649 receive_add_recipient(
5650 string_sprintf("%s%s%s@%s",
5651 ftest_prefix ? ftest_prefix : US"",
5653 ftest_suffix ? ftest_suffix : US"",
5654 deliver_domain), -1);
5656 printf("Recipient = %s\n", recipients_list[0].address);
5657 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5658 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5660 if (chdir("/")) /* Get away from wherever the user is running this from */
5662 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5663 exim_exit(EXIT_FAILURE);
5666 /* Now we run either a system filter test, or a user filter test, or both.
5667 In the latter case, headers added by the system filter will persist and be
5668 available to the user filter. We need to copy the filter variables
5671 if (filter_test & FTEST_SYSTEM)
5672 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5673 exim_exit(EXIT_FAILURE);
5675 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5677 if (filter_test & FTEST_USER)
5678 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5679 exim_exit(EXIT_FAILURE);
5681 exim_exit(EXIT_SUCCESS);
5684 /* Else act on the result of message reception. We should not get here unless
5685 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5686 will be TRUE. If it is not, check on the number of messages received in this
5689 if ( !session_local_queue_only
5690 && smtp_accept_queue_per_connection > 0
5691 && receive_messagecount > smtp_accept_queue_per_connection)
5693 session_local_queue_only = TRUE;
5694 queue_only_reason = 2;
5697 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5698 and queue_only_load is set, check that the load average is below it. If it is
5699 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5700 default), we put the whole session into queue_only mode. It then remains this
5701 way for any subsequent messages on the same SMTP connection. This is a
5702 deliberate choice; even though the load average may fall, it doesn't seem
5703 right to deliver later messages on the same call when not delivering earlier
5704 ones. However, there are odd cases where this is not wanted, so this can be
5705 changed by setting queue_only_load_latch false. */
5707 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5708 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5710 queue_only_reason = 3;
5711 if (queue_only_load_latch) session_local_queue_only = TRUE;
5714 /* If running as an MUA wrapper, all queueing options and freezing options
5718 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5720 /* Log the queueing here, when it will get a message id attached, but
5721 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5724 if (local_queue_only)
5726 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5727 switch(queue_only_reason)
5730 log_write(L_delay_delivery,
5731 LOG_MAIN, "no immediate delivery: more than %d messages "
5732 "received in one connection", smtp_accept_queue_per_connection);
5736 log_write(L_delay_delivery,
5737 LOG_MAIN, "no immediate delivery: load average %.2f",
5738 (double)load_average/1000.0);
5743 else if (f.queue_only_policy || f.deliver_freeze)
5744 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5746 /* Else do the delivery unless the ACL or local_scan() called for queue only
5747 or froze the message. Always deliver in a separate process. A fork failure is
5748 not a disaster, as the delivery will eventually happen on a subsequent queue
5749 run. The search cache must be tidied before the fork, as the parent will
5750 do it before exiting. The child will trigger a lookup failure and
5751 thereby defer the delivery if it tries to use (for example) a cached ldap
5752 connection that the parent has called unbind on. */
5759 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5762 close_unwanted(); /* Close unwanted file descriptors and TLS */
5763 exim_nullstd(); /* Ensure std{in,out,err} exist */
5765 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5766 mode, deliver_drop_privilege is forced TRUE). */
5768 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5770 delivery_re_exec(CEE_EXEC_EXIT);
5771 /* Control does not return here. */
5774 /* No need to re-exec */
5776 rc = deliver_message(message_id, FALSE, FALSE);
5778 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5779 ? EXIT_SUCCESS : EXIT_FAILURE);
5784 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5785 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5786 "process: %s", strerror(errno));
5790 release_cutthrough_connection(US"msg passed for delivery");
5792 /* In the parent, wait if synchronous delivery is required. This will
5793 always be the case in MUA wrapper mode. */
5795 if (f.synchronous_delivery)
5798 while (wait(&status) != pid);
5799 if ((status & 0x00ff) != 0)
5800 log_write(0, LOG_MAIN|LOG_PANIC,
5801 "process %d crashed with signal %d while delivering %s",
5802 (int)pid, status & 0x00ff, message_id);
5803 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5808 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5809 automatically reaps children (see comments above the loop), clear away any
5810 finished subprocesses here, in case there are lots of messages coming in
5811 from the same source. */
5813 #ifndef SIG_IGN_WORKS
5814 while (waitpid(-1, NULL, WNOHANG) > 0);
5818 return_path = sender_address = NULL;
5819 authenticated_sender = NULL;
5820 deliver_localpart_orig = NULL;
5821 deliver_domain_orig = NULL;
5822 deliver_host = deliver_host_address = NULL;
5823 dnslist_domain = dnslist_matched = NULL;
5824 #ifdef WITH_CONTENT_SCAN
5825 malware_name = NULL;
5827 callout_address = NULL;
5828 sending_ip_address = NULL;
5829 deliver_localpart_data = deliver_domain_data =
5830 recipient_data = sender_data = NULL;
5832 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5834 store_reset(reset_point);
5837 exim_exit(EXIT_SUCCESS); /* Never returns */
5838 return 0; /* To stop compiler warning */