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_ESMTP_LIMITS
1014 g = string_cat(g, US" Experimental_ESMTP_Limits");
1016 #ifdef EXPERIMENTAL_QUEUEFILE
1017 g = string_cat(g, US" Experimental_QUEUEFILE");
1019 #if defined(EXPERIMENTAL_SRS_ALT)
1020 g = string_cat(g, US" Experimental_SRS");
1022 g = string_cat(g, US"\n");
1024 g = string_cat(g, US"Lookups (built-in):");
1025 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1026 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1028 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1029 g = string_cat(g, US" cdb");
1031 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1032 g = string_cat(g, US" dbm dbmjz dbmnz");
1034 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1035 g = string_cat(g, US" dnsdb");
1037 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1038 g = string_cat(g, US" dsearch");
1040 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1041 g = string_cat(g, US" ibase");
1043 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1044 g = string_cat(g, US" json");
1046 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1047 g = string_cat(g, US" ldap ldapdn ldapm");
1050 g = string_cat(g, US" lmdb");
1052 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1053 g = string_cat(g, US" mysql");
1055 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1056 g = string_cat(g, US" nis nis0");
1058 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1059 g = string_cat(g, US" nisplus");
1061 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1062 g = string_cat(g, US" oracle");
1064 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1065 g = string_cat(g, US" passwd");
1067 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1068 g = string_cat(g, US" pgsql");
1070 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1071 g = string_cat(g, US" redis");
1073 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1074 g = string_cat(g, US" sqlite");
1076 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1077 g = string_cat(g, US" testdb");
1079 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1080 g = string_cat(g, US" whoson");
1082 g = string_cat(g, US"\n");
1084 g = auth_show_supported(g);
1085 g = route_show_supported(g);
1086 g = transport_show_supported(g);
1088 #ifdef WITH_CONTENT_SCAN
1089 g = malware_show_supported(g);
1092 if (fixed_never_users[0] > 0)
1095 g = string_cat(g, US"Fixed never_users: ");
1096 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1097 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1098 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1101 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1102 fputs(CS string_from_gstring(g), fp);
1104 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1106 /* Everything else is details which are only worth reporting when debugging.
1107 Perhaps the tls_version_report should move into this too. */
1110 /* clang defines __GNUC__ (at least, for me) so test for it first */
1111 #if defined(__clang__)
1112 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1113 #elif defined(__GNUC__)
1114 fprintf(fp, "Compiler: GCC [%s]\n",
1118 "? unknown version ?"
1122 fprintf(fp, "Compiler: <unknown>\n");
1125 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1126 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1127 __GLIBC__, __GLIBC_MINOR__);
1128 if (__GLIBC_PREREQ(2, 1))
1129 fprintf(fp, " Runtime: %s\n",
1130 gnu_get_libc_version());
1133 show_db_version(fp);
1136 tls_version_report(fp);
1139 utf8_version_report(fp);
1142 spf_lib_version_report(fp);
1145 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1146 if (authi->version_report)
1147 (*authi->version_report)(fp);
1149 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1150 characters; unless it's an ancient version of PCRE in which case it
1152 #ifndef PCRE_PRERELEASE
1153 # define PCRE_PRERELEASE
1156 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1157 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1159 PCRE_MAJOR, PCRE_MINOR,
1160 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1163 #undef EXPAND_AND_QUOTE
1166 for (int i = 0; i < lookup_list_count; i++)
1167 if (lookup_list[i]->version_report)
1168 lookup_list[i]->version_report(fp);
1170 #ifdef WHITELIST_D_MACROS
1171 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1173 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1175 #ifdef TRUSTED_CONFIG_LIST
1176 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1178 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1182 store_reset(reset_point);
1186 /*************************************************
1187 * Show auxiliary information about Exim *
1188 *************************************************/
1191 show_exim_information(enum commandline_info request, FILE *stream)
1196 fprintf(stream, "Oops, something went wrong.\n");
1200 "The -bI: flag takes a string indicating which information to provide.\n"
1201 "If the string is not recognised, you'll get this help (on stderr).\n"
1203 " exim -bI:help this information\n"
1204 " exim -bI:dscp list of known dscp value keywords\n"
1205 " exim -bI:sieve list of supported sieve extensions\n"
1209 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1210 fprintf(stream, "%s\n", *pp);
1213 dscp_list_to_stream(stream);
1219 /*************************************************
1220 * Quote a local part *
1221 *************************************************/
1223 /* This function is used when a sender address or a From: or Sender: header
1224 line is being created from the caller's login, or from an authenticated_id. It
1225 applies appropriate quoting rules for a local part.
1227 Argument: the local part
1228 Returns: the local part, quoted if necessary
1232 local_part_quote(uschar *lpart)
1234 BOOL needs_quote = FALSE;
1237 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1239 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1240 (*t != '.' || t == lpart || t[1] == 0);
1243 if (!needs_quote) return lpart;
1245 g = string_catn(NULL, US"\"", 1);
1249 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1252 g = string_cat(g, lpart);
1255 g = string_catn(g, lpart, nq - lpart);
1256 g = string_catn(g, US"\\", 1);
1257 g = string_catn(g, nq, 1);
1261 g = string_catn(g, US"\"", 1);
1262 return string_from_gstring(g);
1268 /*************************************************
1269 * Load readline() functions *
1270 *************************************************/
1272 /* This function is called from testing executions that read data from stdin,
1273 but only when running as the calling user. Currently, only -be does this. The
1274 function loads the readline() function library and passes back the functions.
1275 On some systems, it needs the curses library, so load that too, but try without
1276 it if loading fails. All this functionality has to be requested at build time.
1279 fn_readline_ptr pointer to where to put the readline pointer
1280 fn_addhist_ptr pointer to where to put the addhistory function
1282 Returns: the dlopen handle or NULL on failure
1286 set_readline(char * (**fn_readline_ptr)(const char *),
1287 void (**fn_addhist_ptr)(const char *))
1290 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1292 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1293 if (dlhandle_curses) dlclose(dlhandle_curses);
1297 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1298 * char * readline (const char *prompt);
1299 * void add_history (const char *string);
1301 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1302 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1305 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1313 /*************************************************
1314 * Get a line from stdin for testing things *
1315 *************************************************/
1317 /* This function is called when running tests that can take a number of lines
1318 of input (for example, -be and -bt). It handles continuations and trailing
1319 spaces. And prompting and a blank line output on eof. If readline() is in use,
1320 the arguments are non-NULL and provide the relevant functions.
1323 fn_readline readline function or NULL
1324 fn_addhist addhist function or NULL
1326 Returns: pointer to dynamic memory, or NULL at end of file
1330 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1334 if (!fn_readline) { printf("> "); fflush(stdout); }
1336 for (int i = 0;; i++)
1338 uschar buffer[1024];
1342 char *readline_line = NULL;
1345 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1346 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1347 p = US readline_line;
1352 /* readline() not in use */
1355 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1359 /* Handle the line */
1361 ss = p + (int)Ustrlen(p);
1362 while (ss > p && isspace(ss[-1])) ss--;
1365 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1367 g = string_catn(g, p, ss - p);
1370 if (fn_readline) free(readline_line);
1373 /* g can only be NULL if ss==p */
1374 if (ss == p || g->s[g->ptr-1] != '\\')
1378 (void) string_from_gstring(g);
1381 if (!g) printf("\n");
1382 return string_from_gstring(g);
1387 /*************************************************
1388 * Output usage information for the program *
1389 *************************************************/
1391 /* This function is called when there are no recipients
1392 or a specific --help argument was added.
1395 progname information on what name we were called by
1397 Returns: DOES NOT RETURN
1401 exim_usage(uschar *progname)
1404 /* Handle specific program invocation variants */
1405 if (Ustrcmp(progname, US"-mailq") == 0)
1407 "mailq - list the contents of the mail queue\n\n"
1408 "For a list of options, see the Exim documentation.\n");
1410 /* Generic usage - we output this whatever happens */
1412 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1413 "not directly from a shell command line. Options and/or arguments control\n"
1414 "what it does when called. For a list of options, see the Exim documentation.\n");
1419 /*************************************************
1420 * Validate that the macros given are okay *
1421 *************************************************/
1423 /* Typically, Exim will drop privileges if macros are supplied. In some
1424 cases, we want to not do so.
1426 Arguments: opt_D_used - true if the commandline had a "-D" option
1427 Returns: true if trusted, false otherwise
1431 macros_trusted(BOOL opt_D_used)
1433 #ifdef WHITELIST_D_MACROS
1434 uschar *whitelisted, *end, *p, **whites;
1435 int white_count, i, n;
1437 BOOL prev_char_item, found;
1442 #ifndef WHITELIST_D_MACROS
1446 /* We only trust -D overrides for some invoking users:
1447 root, the exim run-time user, the optional config owner user.
1448 I don't know why config-owner would be needed, but since they can own the
1449 config files anyway, there's no security risk to letting them override -D. */
1450 if ( ! ((real_uid == root_uid)
1451 || (real_uid == exim_uid)
1452 #ifdef CONFIGURE_OWNER
1453 || (real_uid == config_uid)
1457 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1461 /* Get a list of macros which are whitelisted */
1462 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1463 prev_char_item = FALSE;
1465 for (p = whitelisted; *p != '\0'; ++p)
1467 if (*p == ':' || isspace(*p))
1472 prev_char_item = FALSE;
1475 if (!prev_char_item)
1476 prev_char_item = TRUE;
1483 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1484 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1489 if (i == white_count)
1491 while (*p != '\0' && p < end)
1497 /* The list of commandline macros should be very short.
1498 Accept the N*M complexity. */
1499 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1502 for (uschar ** w = whites; *w; ++w)
1503 if (Ustrcmp(*w, m->name) == 0)
1510 if (!m->replacement)
1512 if ((len = m->replen) == 0)
1514 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1515 0, PCRE_EOPT, NULL, 0);
1518 if (n != PCRE_ERROR_NOMATCH)
1519 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1523 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1529 /*************************************************
1530 * Expansion testing *
1531 *************************************************/
1533 /* Expand and print one item, doing macro-processing.
1536 item line for expansion
1540 expansion_test_line(uschar * line)
1545 Ustrncpy(big_buffer, line, big_buffer_size);
1546 big_buffer[big_buffer_size-1] = '\0';
1547 len = Ustrlen(big_buffer);
1549 (void) macros_expand(0, &len, &dummy_macexp);
1551 if (isupper(big_buffer[0]))
1553 if (macro_read_assignment(big_buffer))
1554 printf("Defined macro '%s'\n", mlast->name);
1557 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1558 else printf("Failed: %s\n", expand_string_message);
1563 /*************************************************
1564 * Entry point and high-level code *
1565 *************************************************/
1567 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1568 the appropriate action. All the necessary functions are present in the one
1569 binary. I originally thought one should split it up, but it turns out that so
1570 much of the apparatus is needed in each chunk that one might as well just have
1571 it all available all the time, which then makes the coding easier as well.
1574 argc count of entries in argv
1575 argv argument strings, with argv[0] being the program name
1577 Returns: EXIT_SUCCESS if terminated successfully
1578 EXIT_FAILURE otherwise, except when a message has been sent
1579 to the sender, and -oee was given
1583 main(int argc, char **cargv)
1585 uschar **argv = USS cargv;
1586 int arg_receive_timeout = -1;
1587 int arg_smtp_receive_timeout = -1;
1588 int arg_error_handling = error_handling;
1589 int filter_sfd = -1;
1590 int filter_ufd = -1;
1593 int list_queue_option = 0;
1595 int msg_action_arg = -1;
1596 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1597 int queue_only_reason = 0;
1599 int perl_start_option = 0;
1601 int recipients_arg = argc;
1602 int sender_address_domain = 0;
1603 int test_retry_arg = -1;
1604 int test_rewrite_arg = -1;
1605 gid_t original_egid;
1606 BOOL arg_queue_only = FALSE;
1607 BOOL bi_option = FALSE;
1608 BOOL checking = FALSE;
1609 BOOL count_queue = FALSE;
1610 BOOL expansion_test = FALSE;
1611 BOOL extract_recipients = FALSE;
1612 BOOL flag_G = FALSE;
1613 BOOL flag_n = FALSE;
1614 BOOL forced_delivery = FALSE;
1615 BOOL f_end_dot = FALSE;
1616 BOOL deliver_give_up = FALSE;
1617 BOOL list_queue = FALSE;
1618 BOOL list_options = FALSE;
1619 BOOL list_config = FALSE;
1620 BOOL local_queue_only;
1622 BOOL one_msg_action = FALSE;
1623 BOOL opt_D_used = FALSE;
1624 BOOL queue_only_set = FALSE;
1625 BOOL receiving_message = TRUE;
1626 BOOL sender_ident_set = FALSE;
1627 BOOL session_local_queue_only;
1629 BOOL removed_privilege = FALSE;
1630 BOOL usage_wanted = FALSE;
1631 BOOL verify_address_mode = FALSE;
1632 BOOL verify_as_sender = FALSE;
1633 BOOL rcpt_verify_quota = FALSE;
1634 BOOL version_printed = FALSE;
1635 uschar *alias_arg = NULL;
1636 uschar *called_as = US"";
1637 uschar *cmdline_syslog_name = NULL;
1638 uschar *start_queue_run_id = NULL;
1639 uschar *stop_queue_run_id = NULL;
1640 uschar *expansion_test_message = NULL;
1641 uschar *ftest_domain = NULL;
1642 uschar *ftest_localpart = NULL;
1643 uschar *ftest_prefix = NULL;
1644 uschar *ftest_suffix = NULL;
1645 uschar *log_oneline = NULL;
1646 uschar *malware_test_file = NULL;
1647 uschar *real_sender_address;
1648 uschar *originator_home = US"/";
1652 struct stat statbuf;
1653 pid_t passed_qr_pid = (pid_t)0;
1654 int passed_qr_pipe = -1;
1655 gid_t group_list[EXIM_GROUPLIST_SIZE];
1657 /* For the -bI: flag */
1658 enum commandline_info info_flag = CMDINFO_NONE;
1659 BOOL info_stdout = FALSE;
1661 /* Possible options for -R and -S */
1663 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1665 /* Need to define this in case we need to change the environment in order
1666 to get rid of a bogus time zone. We have to make it char rather than uschar
1667 because some OS define it in /usr/include/unistd.h. */
1669 extern char **environ;
1671 #ifdef MEASURE_TIMING
1672 (void)gettimeofday(×tamp_startup, NULL);
1675 store_init(); /* Initialise the memory allocation susbsystem */
1677 /* If the Exim user and/or group and/or the configuration file owner/group were
1678 defined by ref:name at build time, we must now find the actual uid/gid values.
1679 This is a feature to make the lives of binary distributors easier. */
1681 #ifdef EXIM_USERNAME
1682 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1685 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1687 /* If ref:name uses a number as the name, route_finduser() returns
1688 TRUE with exim_uid set and pw coerced to NULL. */
1690 exim_gid = pw->pw_gid;
1691 #ifndef EXIM_GROUPNAME
1694 "exim: ref:name should specify a usercode, not a group.\n"
1695 "exim: can't let you get away with it unless you also specify a group.\n");
1699 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1702 #ifdef EXIM_GROUPNAME
1703 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1704 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1707 #ifdef CONFIGURE_OWNERNAME
1708 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1709 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1710 CONFIGURE_OWNERNAME);
1713 /* We default the system_filter_user to be the Exim run-time user, as a
1714 sane non-root value. */
1715 system_filter_uid = exim_uid;
1717 #ifdef CONFIGURE_GROUPNAME
1718 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1719 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1720 CONFIGURE_GROUPNAME);
1723 /* In the Cygwin environment, some initialization used to need doing.
1724 It was fudged in by means of this macro; now no longer but we'll leave
1725 it in case of others. */
1731 /* Check a field which is patched when we are running Exim within its
1732 testing harness; do a fast initial check, and then the whole thing. */
1734 f.running_in_test_harness =
1735 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1736 if (f.running_in_test_harness)
1739 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1740 at the start of a program; however, it seems that some environments do not
1741 follow this. A "strange" locale can affect the formatting of timestamps, so we
1744 setlocale(LC_ALL, "C");
1746 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1748 #ifdef _POSIX_MONOTONIC_CLOCK
1752 /* Set up the default handler for timing using alarm(). */
1754 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1756 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1757 because store_malloc writes a log entry on failure. */
1759 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1760 exim_fail("exim: failed to get store for log buffer\n");
1762 /* Initialize the default log options. */
1764 bits_set(log_selector, log_selector_size, log_default);
1766 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1767 NULL when the daemon is run and the file is closed. We have to use this
1768 indirection, because some systems don't allow writing to the variable "stderr".
1771 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1773 /* Arrange for the PCRE regex library to use our store functions. Note that
1774 the normal calls are actually macros that add additional arguments for
1775 debugging purposes so we have to assign specially constructed functions here.
1776 The default is to use store in the stacking pool, but this is overridden in the
1777 regex_must_compile() function. */
1779 pcre_malloc = function_store_get;
1780 pcre_free = function_dummy_free;
1782 /* Ensure there is a big buffer for temporary use in several places. It is put
1783 in malloc store so that it can be freed for enlargement if necessary. */
1785 big_buffer = store_malloc(big_buffer_size);
1787 /* Set up the handler for the data request signal, and set the initial
1788 descriptive text. */
1790 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1791 set_process_info("initializing");
1792 os_restarting_signal(SIGUSR1, usr1_handler);
1794 /* If running in a dockerized environment, the TERM signal is only
1795 delegated to the PID 1 if we request it by setting an signal handler */
1796 if (getpid() == 1) signal(SIGTERM, term_handler);
1798 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1799 in the daemon code. For the rest of Exim's uses, we ignore it. */
1801 signal(SIGHUP, SIG_IGN);
1803 /* We don't want to die on pipe errors as the code is written to handle
1804 the write error instead. */
1806 signal(SIGPIPE, SIG_IGN);
1808 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1809 set to SIG_IGN. This causes subprocesses that complete before the parent
1810 process waits for them not to hang around, so when Exim calls wait(), nothing
1811 is there. The wait() code has been made robust against this, but let's ensure
1812 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1813 ending status. We use sigaction rather than plain signal() on those OS where
1814 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1815 problem on AIX with this.) */
1819 struct sigaction act;
1820 act.sa_handler = SIG_DFL;
1821 sigemptyset(&(act.sa_mask));
1823 sigaction(SIGCHLD, &act, NULL);
1826 signal(SIGCHLD, SIG_DFL);
1829 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1834 /* Set up the version number. Set up the leading 'E' for the external form of
1835 message ids, set the pointer to the internal form, and initialize it to
1836 indicate no message being processed. */
1839 message_id_option[0] = '-';
1840 message_id_external = message_id_option + 1;
1841 message_id_external[0] = 'E';
1842 message_id = message_id_external + 1;
1845 /* Set the umask to zero so that any files Exim creates using open() are
1846 created with the modes that it specifies. NOTE: Files created with fopen() have
1847 a problem, which was not recognized till rather late (February 2006). With this
1848 umask, such files will be world writeable. (They are all content scanning files
1849 in the spool directory, which isn't world-accessible, so this is not a
1850 disaster, but it's untidy.) I don't want to change this overall setting,
1851 however, because it will interact badly with the open() calls. Instead, there's
1852 now a function called modefopen() that fiddles with the umask while calling
1857 /* Precompile the regular expression for matching a message id. Keep this in
1858 step with the code that generates ids in the accept.c module. We need to do
1859 this here, because the -M options check their arguments for syntactic validity
1860 using mac_ismsgid, which uses this. */
1863 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1865 /* Precompile the regular expression that is used for matching an SMTP error
1866 code, possibly extended, at the start of an error message. Note that the
1867 terminating whitespace character is included. */
1870 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1873 #ifdef WHITELIST_D_MACROS
1874 /* Precompile the regular expression used to filter the content of macros
1875 given to -D for permissibility. */
1877 regex_whitelisted_macro =
1878 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1881 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1883 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1884 this seems to be a generally accepted convention, since one finds symbolic
1885 links called "mailq" in standard OS configurations. */
1887 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1888 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1891 receiving_message = FALSE;
1892 called_as = US"-mailq";
1895 /* If the program is called as "rmail" treat it as equivalent to
1896 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1897 i.e. preventing a single dot on a line from terminating the message, and
1898 returning with zero return code, even in cases of error (provided an error
1899 message has been sent). */
1901 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1902 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1905 called_as = US"-rmail";
1906 errors_sender_rc = EXIT_SUCCESS;
1909 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1910 this is a smail convention. */
1912 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1913 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1915 smtp_input = smtp_batched_input = TRUE;
1916 called_as = US"-rsmtp";
1919 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1920 this is a smail convention. */
1922 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1923 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1926 receiving_message = FALSE;
1927 called_as = US"-runq";
1930 /* If the program is called as "newaliases" treat it as equivalent to
1931 "exim -bi"; this is a sendmail convention. */
1933 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1934 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1937 receiving_message = FALSE;
1938 called_as = US"-newaliases";
1941 /* Save the original effective uid for a couple of uses later. It should
1942 normally be root, but in some esoteric environments it may not be. */
1944 original_euid = geteuid();
1945 original_egid = getegid();
1947 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1948 to be the same as the real ones. This makes a difference only if Exim is setuid
1949 (or setgid) to something other than root, which could be the case in some
1950 special configurations. */
1952 real_uid = getuid();
1953 real_gid = getgid();
1955 if (real_uid == root_uid)
1957 if ((rv = setgid(real_gid)))
1958 exim_fail("exim: setgid(%ld) failed: %s\n",
1959 (long int)real_gid, strerror(errno));
1960 if ((rv = setuid(real_uid)))
1961 exim_fail("exim: setuid(%ld) failed: %s\n",
1962 (long int)real_uid, strerror(errno));
1965 /* If neither the original real uid nor the original euid was root, Exim is
1966 running in an unprivileged state. */
1968 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1970 /* For most of the args-parsing we need to use permanent pool memory */
1972 int old_pool = store_pool;
1973 store_pool = POOL_PERM;
1975 /* Scan the program's arguments. Some can be dealt with right away; others are
1976 simply recorded for checking and handling afterwards. Do a high-level switch
1977 on the second character (the one after '-'), to save some effort. */
1979 for (i = 1; i < argc; i++)
1981 BOOL badarg = FALSE;
1982 uschar * arg = argv[i];
1986 /* An argument not starting with '-' is the start of a recipients list;
1987 break out of the options-scanning loop. */
1995 /* An option consisting of -- terminates the options */
1997 if (Ustrcmp(arg, "--") == 0)
1999 recipients_arg = i + 1;
2003 /* Handle flagged options */
2005 switchchar = arg[1];
2008 /* Make all -ex options synonymous with -oex arguments, since that
2009 is assumed by various callers. Also make -qR options synonymous with -R
2010 options, as that seems to be required as well. Allow for -qqR too, and
2011 the same for -S options. */
2013 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2014 Ustrncmp(arg+1, "qR", 2) == 0 ||
2015 Ustrncmp(arg+1, "qS", 2) == 0)
2017 switchchar = arg[2];
2020 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2022 switchchar = arg[3];
2024 f.queue_2stage = TRUE;
2027 /* Make -r synonymous with -f, since it is a documented alias */
2029 else if (arg[1] == 'r') switchchar = 'f';
2031 /* Make -ov synonymous with -v */
2033 else if (Ustrcmp(arg, "-ov") == 0)
2039 /* deal with --option_aliases */
2040 else if (switchchar == '-')
2042 if (Ustrcmp(argrest, "help") == 0)
2044 usage_wanted = TRUE;
2047 else if (Ustrcmp(argrest, "version") == 0)
2054 /* High-level switch on active initial letter */
2059 /* sendmail uses -Ac and -Am to control which .cf file is used;
2062 if (!*argrest) { badarg = TRUE; break; }
2065 BOOL ignore = FALSE;
2070 if (*(argrest + 1) == '\0')
2074 if (!ignore) badarg = TRUE;
2078 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2079 so has no need of it. */
2082 if (!*argrest) i++; /* Skip over the type */
2088 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2092 /* -bd: Run in daemon mode, awaiting SMTP connections.
2093 -bdf: Ditto, but in the foreground.
2096 f.daemon_listen = TRUE;
2097 if (*argrest == 'f') f.background_daemon = FALSE;
2098 else if (*argrest) badarg = TRUE;
2101 /* -be: Run in expansion test mode
2102 -bem: Ditto, but read a message from a file first
2105 expansion_test = checking = TRUE;
2106 if (*argrest == 'm')
2108 if (++i >= argc) { badarg = TRUE; break; }
2109 expansion_test_message = argv[i];
2112 if (*argrest) badarg = TRUE;
2115 /* -bF: Run system filter test */
2117 filter_test |= checking = FTEST_SYSTEM;
2118 if (*argrest) badarg = TRUE;
2119 else if (++i < argc) filter_test_sfile = argv[i];
2120 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2123 /* -bf: Run user filter test
2124 -bfd: Set domain for filter testing
2125 -bfl: Set local part for filter testing
2126 -bfp: Set prefix for filter testing
2127 -bfs: Set suffix for filter testing
2132 filter_test |= checking = FTEST_USER;
2133 if (++i < argc) filter_test_ufile = argv[i];
2134 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2139 exim_fail("exim: string expected after %s\n", arg);
2140 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2141 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2142 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2143 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2148 /* -bh: Host checking - an IP address must follow. */
2150 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2152 if (++i >= argc) { badarg = TRUE; break; }
2153 sender_host_address = string_copy_taint(argv[i], TRUE);
2154 host_checking = checking = f.log_testing_mode = TRUE;
2155 f.host_checking_callout = *argrest == 'c';
2156 message_logs = FALSE;
2161 /* -bi: This option is used by sendmail to initialize *the* alias file,
2162 though it has the -oA option to specify a different file. Exim has no
2163 concept of *the* alias file, but since Sun's YP make script calls
2164 sendmail this way, some support must be provided. */
2166 if (!*argrest) bi_option = TRUE;
2170 /* -bI: provide information, of the type to follow after a colon.
2171 This is an Exim flag. */
2173 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2175 uschar *p = argrest+1;
2176 info_flag = CMDINFO_HELP;
2178 if (strcmpic(p, CUS"sieve") == 0)
2180 info_flag = CMDINFO_SIEVE;
2183 else if (strcmpic(p, CUS"dscp") == 0)
2185 info_flag = CMDINFO_DSCP;
2188 else if (strcmpic(p, CUS"help") == 0)
2194 /* -bm: Accept and deliver message - the default option. Reinstate
2195 receiving_message, which got turned off for all -b options.
2196 -bmalware: test the filename given for malware */
2198 if (!*argrest) receiving_message = TRUE;
2199 else if (Ustrcmp(argrest, "alware") == 0)
2201 if (++i >= argc) { badarg = TRUE; break; }
2203 malware_test_file = argv[i];
2208 /* -bnq: For locally originating messages, do not qualify unqualified
2209 addresses. In the envelope, this causes errors; in header lines they
2212 if (Ustrcmp(argrest, "q") == 0)
2214 f.allow_unqualified_sender = FALSE;
2215 f.allow_unqualified_recipient = FALSE;
2220 /* -bpxx: List the contents of the mail queue, in various forms. If
2221 the option is -bpc, just a queue count is needed. Otherwise, if the
2222 first letter after p is r, then order is random. */
2224 if (*argrest == 'c')
2227 if (*++argrest) badarg = TRUE;
2231 if (*argrest == 'r')
2233 list_queue_option = 8;
2236 else list_queue_option = 0;
2240 /* -bp: List the contents of the mail queue, top-level only */
2244 /* -bpu: List the contents of the mail queue, top-level undelivered */
2246 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2248 /* -bpa: List the contents of the mail queue, including all delivered */
2250 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2252 /* Unknown after -bp[r] */
2258 /* -bP: List the configuration variables given as the address list.
2259 Force -v, so configuration errors get displayed. */
2262 /* -bP config: we need to setup here, because later,
2263 when list_options is checked, the config is read already */
2266 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2269 readconf_save_config(version_string);
2273 list_options = TRUE;
2274 debug_selector |= D_v;
2275 debug_file = stderr;
2279 /* -brt: Test retry configuration lookup */
2281 if (Ustrcmp(argrest, "t") == 0)
2284 test_retry_arg = i + 1;
2288 /* -brw: Test rewrite configuration */
2290 else if (Ustrcmp(argrest, "w") == 0)
2293 test_rewrite_arg = i + 1;
2299 /* -bS: Read SMTP commands on standard input, but produce no replies -
2300 all errors are reported by sending messages. */
2303 smtp_input = smtp_batched_input = receiving_message = TRUE;
2307 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2308 on standard output. */
2310 if (!*argrest) smtp_input = receiving_message = TRUE;
2314 /* -bt: address testing mode */
2317 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2321 /* -bv: verify addresses */
2324 verify_address_mode = checking = f.log_testing_mode = TRUE;
2326 /* -bvs: verify sender addresses */
2328 else if (Ustrcmp(argrest, "s") == 0)
2330 verify_address_mode = checking = f.log_testing_mode = TRUE;
2331 verify_as_sender = TRUE;
2336 /* -bV: Print version string and support details */
2340 printf("Exim version %s #%s built %s\n", version_string,
2341 version_cnumber, version_date);
2342 printf("%s\n", CS version_copyright);
2343 version_printed = TRUE;
2344 show_whats_supported(stdout);
2345 f.log_testing_mode = TRUE;
2350 /* -bw: inetd wait mode, accept a listening socket as stdin */
2352 f.inetd_wait_mode = TRUE;
2353 f.background_daemon = FALSE;
2354 f.daemon_listen = TRUE;
2356 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2357 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2368 /* -C: change configuration file list; ignore if it isn't really
2369 a change! Enforce a prefix check if required. */
2373 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2374 if (Ustrcmp(config_main_filelist, argrest) != 0)
2376 #ifdef ALT_CONFIG_PREFIX
2378 int len = Ustrlen(ALT_CONFIG_PREFIX);
2379 const uschar *list = argrest;
2381 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2382 while((filename = string_nextinlist(&list, &sep, big_buffer,
2384 if ( ( Ustrlen(filename) < len
2385 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2386 || Ustrstr(filename, "/../") != NULL
2388 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2390 exim_fail("-C Permission denied\n");
2392 if (real_uid != root_uid)
2394 #ifdef TRUSTED_CONFIG_LIST
2396 if (real_uid != exim_uid
2397 #ifdef CONFIGURE_OWNER
2398 && real_uid != config_uid
2401 f.trusted_config = FALSE;
2404 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2407 struct stat statbuf;
2409 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2410 (statbuf.st_uid != root_uid /* owner not root */
2411 #ifdef CONFIGURE_OWNER
2412 && statbuf.st_uid != config_uid /* owner not the special one */
2415 (statbuf.st_gid != root_gid /* group not root */
2416 #ifdef CONFIGURE_GROUP
2417 && statbuf.st_gid != config_gid /* group not the special one */
2419 && (statbuf.st_mode & 020) != 0 /* group writeable */
2421 (statbuf.st_mode & 2) != 0) /* world writeable */
2423 f.trusted_config = FALSE;
2428 /* Well, the trust list at least is up to scratch... */
2430 uschar *trusted_configs[32];
2433 int old_pool = store_pool;
2434 store_pool = POOL_MAIN;
2436 reset_point = store_mark();
2437 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2439 uschar *start = big_buffer, *nl;
2440 while (*start && isspace(*start))
2444 nl = Ustrchr(start, '\n');
2447 trusted_configs[nr_configs++] = string_copy(start);
2448 if (nr_configs == nelem(trusted_configs))
2456 const uschar *list = argrest;
2458 while (f.trusted_config && (filename = string_nextinlist(&list,
2459 &sep, big_buffer, big_buffer_size)))
2461 for (i=0; i < nr_configs; i++)
2462 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2464 if (i == nr_configs)
2466 f.trusted_config = FALSE;
2471 else /* No valid prefixes found in trust_list file. */
2472 f.trusted_config = FALSE;
2473 store_reset(reset_point);
2474 store_pool = old_pool;
2477 else /* Could not open trust_list file. */
2478 f.trusted_config = FALSE;
2481 /* Not root; don't trust config */
2482 f.trusted_config = FALSE;
2486 config_main_filelist = argrest;
2487 f.config_changed = TRUE;
2492 /* -D: set up a macro definition */
2495 #ifdef DISABLE_D_OPTION
2496 exim_fail("exim: -D is not available in this Exim binary\n");
2502 uschar *s = argrest;
2505 while (isspace(*s)) s++;
2507 if (*s < 'A' || *s > 'Z')
2508 exim_fail("exim: macro name set by -D must start with "
2509 "an upper case letter\n");
2511 while (isalnum(*s) || *s == '_')
2513 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2517 if (ptr == 0) { badarg = TRUE; break; }
2518 while (isspace(*s)) s++;
2521 if (*s++ != '=') { badarg = TRUE; break; }
2522 while (isspace(*s)) s++;
2525 for (m = macros_user; m; m = m->next)
2526 if (Ustrcmp(m->name, name) == 0)
2527 exim_fail("exim: duplicated -D in command line\n");
2529 m = macro_create(name, s, TRUE);
2531 if (clmacro_count >= MAX_CLMACROS)
2532 exim_fail("exim: too many -D options on command line\n");
2533 clmacros[clmacro_count++] =
2534 string_sprintf("-D%s=%s", m->name, m->replacement);
2539 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2540 The latter is now a no-op, retained for compatibility only. If -dd is used,
2541 debugging subprocesses of the daemon is disabled. */
2544 if (Ustrcmp(argrest, "ropcr") == 0)
2546 /* drop_cr = TRUE; */
2549 /* Use an intermediate variable so that we don't set debugging while
2550 decoding the debugging bits. */
2554 unsigned int selector = D_default;
2557 if (*argrest == 'd')
2559 f.debug_daemon = TRUE;
2563 decode_bits(&selector, 1, debug_notall, argrest,
2564 debug_options, debug_options_count, US"debug", 0);
2565 debug_selector = selector;
2570 /* -E: This is a local error message. This option is not intended for
2571 external use at all, but is not restricted to trusted callers because it
2572 does no harm (just suppresses certain error messages) and if Exim is run
2573 not setuid root it won't always be trusted when it generates error
2574 messages using this option. If there is a message id following -E, point
2575 message_reference at it, for logging. */
2578 f.local_error_message = TRUE;
2579 if (mac_ismsgid(argrest)) message_reference = argrest;
2583 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2584 option, so it looks as if historically the -oex options are also callable
2585 without the leading -o. So we have to accept them. Before the switch,
2586 anything starting -oe has been converted to -e. Exim does not support all
2587 of the sendmail error options. */
2590 if (Ustrcmp(argrest, "e") == 0)
2592 arg_error_handling = ERRORS_SENDER;
2593 errors_sender_rc = EXIT_SUCCESS;
2595 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2596 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2597 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2598 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2603 /* -F: Set sender's full name, used instead of the gecos entry from
2604 the password file. Since users can usually alter their gecos entries,
2605 there's no security involved in using this instead. The data can follow
2606 the -F or be in the next argument. */
2610 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2611 originator_name = string_copy_taint(argrest, TRUE);
2612 f.sender_name_forced = TRUE;
2616 /* -f: Set sender's address - this value is only actually used if Exim is
2617 run by a trusted user, or if untrusted_set_sender is set and matches the
2618 address, except that the null address can always be set by any user. The
2619 test for this happens later, when the value given here is ignored when not
2620 permitted. For an untrusted user, the actual sender is still put in Sender:
2621 if it doesn't match the From: header (unless no_local_from_check is set).
2622 The data can follow the -f or be in the next argument. The -r switch is an
2623 obsolete form of -f but since there appear to be programs out there that
2624 use anything that sendmail has ever supported, better accept it - the
2625 synonymizing is done before the switch above.
2627 At this stage, we must allow domain literal addresses, because we don't
2628 know what the setting of allow_domain_literals is yet. Ditto for trailing
2629 dots and strip_trailing_dot. */
2633 int dummy_start, dummy_end;
2636 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2638 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2641 uschar * temp = argrest + Ustrlen(argrest) - 1;
2642 while (temp >= argrest && isspace(*temp)) temp--;
2643 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2644 allow_domain_literals = TRUE;
2645 strip_trailing_dot = TRUE;
2647 allow_utf8_domains = TRUE;
2649 if (!(sender_address = parse_extract_address(argrest, &errmess,
2650 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2651 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2653 sender_address = string_copy_taint(sender_address, TRUE);
2655 message_smtputf8 = string_is_utf8(sender_address);
2656 allow_utf8_domains = FALSE;
2658 allow_domain_literals = FALSE;
2659 strip_trailing_dot = FALSE;
2661 f.sender_address_forced = TRUE;
2665 /* -G: sendmail invocation to specify that it's a gateway submission and
2666 sendmail may complain about problems instead of fixing them.
2667 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2668 not at this time complain about problems. */
2674 /* -h: Set the hop count for an incoming message. Exim does not currently
2675 support this; it always computes it by counting the Received: headers.
2676 To put it in will require a change to the spool header file format. */
2680 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2681 if (!isdigit(*argrest)) badarg = TRUE;
2685 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2686 not to be documented for sendmail but mailx (at least) uses it) */
2689 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2693 /* -L: set the identifier used for syslog; equivalent to setting
2694 syslog_processname in the config file, but needs to be an admin option. */
2698 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2699 if ((sz = Ustrlen(argrest)) > 32)
2700 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2702 exim_fail("exim: the -L syslog name is too short\n");
2703 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2707 receiving_message = FALSE;
2709 /* -MC: continue delivery of another message via an existing open
2710 file descriptor. This option is used for an internal call by the
2711 smtp transport when there is a pending message waiting to go to an
2712 address to which it has got a connection. Five subsequent arguments are
2713 required: transport name, host name, IP address, sequence number, and
2714 message_id. Transports may decline to create new processes if the sequence
2715 number gets too big. The channel is stdin. This (-MC) must be the last
2716 argument. There's a subsequent check that the real-uid is privileged.
2718 If we are running in the test harness. delay for a bit, to let the process
2719 that set this one up complete. This makes for repeatability of the logging,
2722 if (Ustrcmp(argrest, "C") == 0)
2724 union sockaddr_46 interface_sock;
2725 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2728 exim_fail("exim: too many or too few arguments after -MC\n");
2730 if (msg_action_arg >= 0)
2731 exim_fail("exim: incompatible arguments\n");
2733 continue_transport = string_copy_taint(argv[++i], TRUE);
2734 continue_hostname = string_copy_taint(argv[++i], TRUE);
2735 continue_host_address = string_copy_taint(argv[++i], TRUE);
2736 continue_sequence = Uatoi(argv[++i]);
2737 msg_action = MSG_DELIVER;
2738 msg_action_arg = ++i;
2739 forced_delivery = TRUE;
2740 queue_run_pid = passed_qr_pid;
2741 queue_run_pipe = passed_qr_pipe;
2743 if (!mac_ismsgid(argv[i]))
2744 exim_fail("exim: malformed message id %s after -MC option\n",
2747 /* Set up $sending_ip_address and $sending_port, unless proxied */
2749 if (!continue_proxy_cipher)
2750 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2752 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2755 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2758 testharness_pause_ms(500);
2762 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2766 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2767 precedes -MC (see above). The flag indicates that the host to which
2768 Exim is connected has accepted an AUTH sequence. */
2770 case 'A': f.smtp_authenticated = TRUE; break;
2772 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2773 that exim is connected to supports the esmtp extension DSN */
2775 case 'D': smtp_peer_options |= OPTION_DSN; break;
2777 /* -MCd: for debug, set a process-purpose string */
2779 case 'd': if (++i < argc)
2780 process_purpose = string_copy_taint(argv[i], TRUE);
2784 /* -MCG: set the queue name, to a non-default value */
2786 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2790 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2792 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2794 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2795 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2796 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2798 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2800 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2805 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2806 it preceded -MC (see above) */
2808 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2810 #ifdef SUPPORT_SOCKS
2811 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2812 case 'p': proxy_session = TRUE;
2815 proxy_local_address = string_copy_taint(argv[i], TRUE);
2818 proxy_local_port = Uatoi(argv[i]);
2821 proxy_external_address = string_copy_taint(argv[i], TRUE);
2824 proxy_external_port = Uatoi(argv[i]);
2830 /* -MCQ: pass on the pid of the queue-running process that started
2831 this chain of deliveries and the fd of its synchronizing pipe; this
2832 is useful only when it precedes -MC (see above) */
2834 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2836 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2840 /* -MCq: do a quota check on the given recipient for the given size
2841 of message. Separate from -MC. */
2842 case 'q': rcpt_verify_quota = TRUE;
2843 if (++i < argc) message_size = Uatoi(argv[i]);
2847 /* -MCS: set the smtp_use_size flag; this is useful only when it
2848 precedes -MC (see above) */
2850 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2853 /* -MCs: used with -MCt; SNI was sent */
2854 /* -MCr: ditto, DANE */
2857 case 's': if (++i < argc)
2859 continue_proxy_sni = string_copy_taint(argv[i], TRUE);
2860 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2865 /* -MCt: similar to -MCT below but the connection is still open
2866 via a proxy process which handles the TLS context and coding.
2867 Require three arguments for the proxied local address and port,
2868 and the TLS cipher. */
2870 case 't': if (++i < argc)
2871 sending_ip_address = string_copy_taint(argv[i], TRUE);
2874 sending_port = (int)(Uatol(argv[i]));
2877 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2881 /* -MCT: set the tls_offered flag; this is useful only when it
2882 precedes -MC (see above). The flag indicates that the host to which
2883 Exim is connected has offered TLS support. */
2885 case 'T': smtp_peer_options |= OPTION_TLS; break;
2888 default: badarg = TRUE; break;
2893 /* -M[x]: various operations on the following list of message ids:
2894 -M deliver the messages, ignoring next retry times and thawing
2895 -Mc deliver the messages, checking next retry times, no thawing
2896 -Mf freeze the messages
2897 -Mg give up on the messages
2898 -Mt thaw the messages
2899 -Mrm remove the messages
2900 In the above cases, this must be the last option. There are also the
2901 following options which are followed by a single message id, and which
2902 act on that message. Some of them use the "recipient" addresses as well.
2903 -Mar add recipient(s)
2904 -Mmad mark all recipients delivered
2905 -Mmd mark recipients(s) delivered
2907 -Mset load a message for use with -be
2909 -Mvc show copy (of whole message, in RFC 2822 format)
2916 msg_action = MSG_DELIVER;
2917 forced_delivery = f.deliver_force_thaw = TRUE;
2919 else if (Ustrcmp(argrest, "ar") == 0)
2921 msg_action = MSG_ADD_RECIPIENT;
2922 one_msg_action = TRUE;
2924 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2925 else if (Ustrcmp(argrest, "es") == 0)
2927 msg_action = MSG_EDIT_SENDER;
2928 one_msg_action = TRUE;
2930 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2931 else if (Ustrcmp(argrest, "g") == 0)
2933 msg_action = MSG_DELIVER;
2934 deliver_give_up = TRUE;
2936 else if (Ustrcmp(argrest, "G") == 0)
2938 msg_action = MSG_SETQUEUE;
2939 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2941 else if (Ustrcmp(argrest, "mad") == 0)
2943 msg_action = MSG_MARK_ALL_DELIVERED;
2945 else if (Ustrcmp(argrest, "md") == 0)
2947 msg_action = MSG_MARK_DELIVERED;
2948 one_msg_action = TRUE;
2950 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2951 else if (Ustrcmp(argrest, "set") == 0)
2953 msg_action = MSG_LOAD;
2954 one_msg_action = TRUE;
2956 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2957 else if (Ustrcmp(argrest, "vb") == 0)
2959 msg_action = MSG_SHOW_BODY;
2960 one_msg_action = TRUE;
2962 else if (Ustrcmp(argrest, "vc") == 0)
2964 msg_action = MSG_SHOW_COPY;
2965 one_msg_action = TRUE;
2967 else if (Ustrcmp(argrest, "vh") == 0)
2969 msg_action = MSG_SHOW_HEADER;
2970 one_msg_action = TRUE;
2972 else if (Ustrcmp(argrest, "vl") == 0)
2974 msg_action = MSG_SHOW_LOG;
2975 one_msg_action = TRUE;
2977 else { badarg = TRUE; break; }
2979 /* All the -Mxx options require at least one message id. */
2981 msg_action_arg = i + 1;
2982 if (msg_action_arg >= argc)
2983 exim_fail("exim: no message ids given after %s option\n", arg);
2985 /* Some require only message ids to follow */
2987 if (!one_msg_action)
2989 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2990 exim_fail("exim: malformed message id %s after %s option\n",
2992 goto END_ARG; /* Remaining args are ids */
2995 /* Others require only one message id, possibly followed by addresses,
2996 which will be handled as normal arguments. */
3000 if (!mac_ismsgid(argv[msg_action_arg]))
3001 exim_fail("exim: malformed message id %s after %s option\n",
3002 argv[msg_action_arg], arg);
3008 /* Some programs seem to call the -om option without the leading o;
3009 for sendmail it askes for "me too". Exim always does this. */
3012 if (*argrest) badarg = TRUE;
3016 /* -N: don't do delivery - a debugging option that stops transports doing
3017 their thing. It implies debugging at the D_v level. */
3022 f.dont_deliver = TRUE;
3023 debug_selector |= D_v;
3024 debug_file = stderr;
3030 /* -n: This means "don't alias" in sendmail, apparently.
3031 For normal invocations, it has no effect.
3032 It may affect some other options. */
3038 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3039 option to the specified value. This form uses long names. We need to handle
3040 -O option=value and -Ooption=value. */
3045 exim_fail("exim: string expected after -O\n");
3051 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3054 if (!*(alias_arg = argrest))
3055 if (i+1 < argc) alias_arg = argv[++i];
3056 else exim_fail("exim: string expected after -oA\n");
3059 /* -oB: Set a connection message max value for remote deliveries */
3062 uschar * p = argrest;
3064 if (i+1 < argc && isdigit((argv[i+1][0])))
3068 connection_max_messages = 1;
3075 exim_fail("exim: number expected after -oB\n");
3076 connection_max_messages = Uatoi(p);
3081 /* -odb: background delivery */
3084 if (Ustrcmp(argrest, "b") == 0)
3086 f.synchronous_delivery = FALSE;
3087 arg_queue_only = FALSE;
3088 queue_only_set = TRUE;
3091 /* -odd: testsuite-only: add no inter-process delays */
3093 else if (Ustrcmp(argrest, "d") == 0)
3094 f.testsuite_delays = FALSE;
3096 /* -odf: foreground delivery (smail-compatible option); same effect as
3097 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3100 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3102 f.synchronous_delivery = TRUE;
3103 arg_queue_only = FALSE;
3104 queue_only_set = TRUE;
3107 /* -odq: queue only */
3109 else if (Ustrcmp(argrest, "q") == 0)
3111 f.synchronous_delivery = FALSE;
3112 arg_queue_only = TRUE;
3113 queue_only_set = TRUE;
3116 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3117 but no remote delivery */
3119 else if (Ustrcmp(argrest, "qs") == 0)
3121 f.queue_smtp = TRUE;
3122 arg_queue_only = FALSE;
3123 queue_only_set = TRUE;
3128 /* -oex: Sendmail error flags. As these are also accepted without the
3129 leading -o prefix, for compatibility with vacation and other callers,
3130 they are handled with -e above. */
3132 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3133 -oitrue: Another sendmail syntax for the same */
3136 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3141 /* -oM*: Set various characteristics for an incoming message; actually
3142 acted on for trusted callers only. */
3147 exim_fail("exim: data expected after -oM%s\n", argrest);
3149 /* -oMa: Set sender host address */
3151 if (Ustrcmp(argrest, "a") == 0)
3152 sender_host_address = string_copy_taint(argv[++i], TRUE);
3154 /* -oMaa: Set authenticator name */
3156 else if (Ustrcmp(argrest, "aa") == 0)
3157 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3159 /* -oMas: setting authenticated sender */
3161 else if (Ustrcmp(argrest, "as") == 0)
3162 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3164 /* -oMai: setting authenticated id */
3166 else if (Ustrcmp(argrest, "ai") == 0)
3167 authenticated_id = string_copy_taint(argv[++i], TRUE);
3169 /* -oMi: Set incoming interface address */
3171 else if (Ustrcmp(argrest, "i") == 0)
3172 interface_address = string_copy_taint(argv[++i], TRUE);
3174 /* -oMm: Message reference */
3176 else if (Ustrcmp(argrest, "m") == 0)
3178 if (!mac_ismsgid(argv[i+1]))
3179 exim_fail("-oMm must be a valid message ID\n");
3180 if (!f.trusted_config)
3181 exim_fail("-oMm must be called by a trusted user/config\n");
3182 message_reference = argv[++i];
3185 /* -oMr: Received protocol */
3187 else if (Ustrcmp(argrest, "r") == 0)
3189 if (received_protocol)
3190 exim_fail("received_protocol is set already\n");
3192 received_protocol = string_copy_taint(argv[++i], TRUE);
3194 /* -oMs: Set sender host name */
3196 else if (Ustrcmp(argrest, "s") == 0)
3197 sender_host_name = string_copy_taint(argv[++i], TRUE);
3199 /* -oMt: Set sender ident */
3201 else if (Ustrcmp(argrest, "t") == 0)
3203 sender_ident_set = TRUE;
3204 sender_ident = string_copy_taint(argv[++i], TRUE);
3207 /* Else a bad argument */
3214 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3215 seem to call this as -m (undocumented), so that is also accepted (see
3217 /* -oo: An ancient flag for old-style addresses which still seems to
3218 crop up in some calls (see in SCO). */
3222 if (*argrest) badarg = TRUE;
3225 /* -oP <name>: set pid file path for daemon
3226 -oPX: delete pid file of daemon */
3229 if (!*argrest) override_pid_file_path = argv[++i];
3230 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3235 /* -or <n>: set timeout for non-SMTP acceptance
3236 -os <n>: set timeout for SMTP acceptance */
3241 int * tp = argrest[-1] == 'r'
3242 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3244 *tp = readconf_readtime(argrest, 0, FALSE);
3245 else if (i+1 < argc)
3246 *tp = readconf_readtime(argv[++i], 0, FALSE);
3249 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3253 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3256 if (*argrest) badarg = TRUE;
3257 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3260 /* -oY: Override creation of daemon notifier socket */
3263 if (*argrest) badarg = TRUE;
3264 else notifier_socket = NULL;
3267 /* Unknown -o argument */
3275 /* -ps: force Perl startup; -pd force delayed Perl startup */
3279 if (*argrest == 's' && argrest[1] == 0)
3281 perl_start_option = 1;
3284 if (*argrest == 'd' && argrest[1] == 0)
3286 perl_start_option = -1;
3291 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3292 which sets the host protocol and host name */
3295 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3299 uschar * hn = Ustrchr(argrest, ':');
3301 if (received_protocol)
3302 exim_fail("received_protocol is set already\n");
3305 received_protocol = string_copy_taint(argrest, TRUE);
3308 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3309 sender_host_name = string_copy_taint(hn + 1, TRUE);
3316 receiving_message = FALSE;
3317 if (queue_interval >= 0)
3318 exim_fail("exim: -q specified more than once\n");
3320 /* -qq...: Do queue runs in a 2-stage manner */
3322 if (*argrest == 'q')
3324 f.queue_2stage = TRUE;
3328 /* -qi...: Do only first (initial) deliveries */
3330 if (*argrest == 'i')
3332 f.queue_run_first_delivery = TRUE;
3336 /* -qf...: Run the queue, forcing deliveries
3337 -qff..: Ditto, forcing thawing as well */
3339 if (*argrest == 'f')
3341 f.queue_run_force = TRUE;
3342 if (*++argrest == 'f')
3344 f.deliver_force_thaw = TRUE;
3349 /* -q[f][f]l...: Run the queue only on local deliveries */
3351 if (*argrest == 'l')
3353 f.queue_run_local = TRUE;
3357 /* -q[f][f][l][G<name>]... Work on the named queue */
3359 if (*argrest == 'G')
3362 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3363 queue_name = string_copyn(argrest, i);
3365 if (*argrest == '/') argrest++;
3368 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3369 only, optionally named, optionally starting from a given message id. */
3371 if (!(list_queue || count_queue))
3373 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3376 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3377 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3378 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3379 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3382 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3383 forced, optionally local only, optionally named. */
3385 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3387 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3391 case 'R': /* Synonymous with -qR... */
3392 receiving_message = FALSE;
3394 /* -Rf: As -R (below) but force all deliveries,
3395 -Rff: Ditto, but also thaw all frozen messages,
3396 -Rr: String is regex
3397 -Rrf: Regex and force
3398 -Rrff: Regex and force and thaw
3400 in all cases provided there are no further characters in this
3404 for (int i = 0; i < nelem(rsopts); i++)
3405 if (Ustrcmp(argrest, rsopts[i]) == 0)
3407 if (i != 2) f.queue_run_force = TRUE;
3408 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3409 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3410 argrest += Ustrlen(rsopts[i]);
3413 /* -R: Set string to match in addresses for forced queue run to
3414 pick out particular messages. */
3417 deliver_selectstring = string_copy_taint(argrest, TRUE);
3418 else if (i+1 < argc)
3419 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3421 exim_fail("exim: string expected after -R\n");
3425 /* -r: an obsolete synonym for -f (see above) */
3428 /* -S: Like -R but works on sender. */
3430 case 'S': /* Synonymous with -qS... */
3431 receiving_message = FALSE;
3433 /* -Sf: As -S (below) but force all deliveries,
3434 -Sff: Ditto, but also thaw all frozen messages,
3435 -Sr: String is regex
3436 -Srf: Regex and force
3437 -Srff: Regex and force and thaw
3439 in all cases provided there are no further characters in this
3443 for (int i = 0; i < nelem(rsopts); i++)
3444 if (Ustrcmp(argrest, rsopts[i]) == 0)
3446 if (i != 2) f.queue_run_force = TRUE;
3447 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3448 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3449 argrest += Ustrlen(rsopts[i]);
3452 /* -S: Set string to match in addresses for forced queue run to
3453 pick out particular messages. */
3456 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3457 else if (i+1 < argc)
3458 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3460 exim_fail("exim: string expected after -S\n");
3463 /* -Tqt is an option that is exclusively for use by the testing suite.
3464 It is not recognized in other circumstances. It allows for the setting up
3465 of explicit "queue times" so that various warning/retry things can be
3466 tested. Otherwise variability of clock ticks etc. cause problems. */
3469 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3470 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3475 /* -t: Set flag to extract recipients from body of message. */
3478 if (!*argrest) extract_recipients = TRUE;
3480 /* -ti: Set flag to extract recipients from body of message, and also
3481 specify that dot does not end the message. */
3483 else if (Ustrcmp(argrest, "i") == 0)
3485 extract_recipients = TRUE;
3489 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3492 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3499 /* -U: This means "initial user submission" in sendmail, apparently. The
3500 doc claims that in future sendmail may refuse syntactically invalid
3501 messages instead of fixing them. For the moment, we just ignore it. */
3507 /* -v: verify things - this is a very low-level debugging */
3512 debug_selector |= D_v;
3513 debug_file = stderr;
3519 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3521 The -x flag tells the sendmail command that mail from a local
3522 mail program has National Language Support (NLS) extended characters
3523 in the body of the mail item. The sendmail command can send mail with
3524 extended NLS characters across networks that normally corrupts these
3527 As Exim is 8-bit clean, it just ignores this flag. */
3530 if (*argrest) badarg = TRUE;
3533 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3534 logs to that file. We swallow the parameter and otherwise ignore it. */
3539 exim_fail("exim: string expected after -X\n");
3545 log_oneline = string_copy_taint(argv[i], TRUE);
3547 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3550 /* All other initial characters are errors */
3555 } /* End of high-level switch statement */
3557 /* Failed to recognize the option, or syntax error */
3560 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3561 "option %s\n", arg);
3565 /* If -R or -S have been specified without -q, assume a single queue run. */
3567 if ( (deliver_selectstring || deliver_selectstring_sender)
3568 && queue_interval < 0)
3573 store_pool = old_pool;
3576 /* If usage_wanted is set we call the usage function - which never returns */
3577 if (usage_wanted) exim_usage(called_as);
3579 /* Arguments have been processed. Check for incompatibilities. */
3580 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3581 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3582 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3583 || filter_test != FTEST_NONE
3584 || msg_action_arg > 0 && !one_msg_action
3586 || ( msg_action_arg > 0
3587 && ( f.daemon_listen || queue_interval > 0 || list_options
3588 || checking && msg_action != MSG_LOAD
3589 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3591 || ( (f.daemon_listen || queue_interval > 0)
3592 && ( sender_address || list_options || list_queue || checking
3595 || f.daemon_listen && queue_interval == 0
3596 || f.inetd_wait_mode && queue_interval >= 0
3598 && ( checking || smtp_input || extract_recipients
3599 || filter_test != FTEST_NONE || bi_option
3601 || ( verify_address_mode
3602 && ( f.address_test_mode || smtp_input || extract_recipients
3603 || filter_test != FTEST_NONE || bi_option
3605 || ( f.address_test_mode
3606 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3610 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3612 || deliver_selectstring && queue_interval < 0
3613 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3615 exim_fail("exim: incompatible command-line options or arguments\n");
3617 /* If debugging is set up, set the file and the file descriptor to pass on to
3618 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3619 to run in the foreground. */
3621 if (debug_selector != 0)
3623 debug_file = stderr;
3624 debug_fd = fileno(debug_file);
3625 f.background_daemon = FALSE;
3626 testharness_pause_ms(100); /* lets caller finish */
3627 if (debug_selector != D_v) /* -v only doesn't show this */
3629 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3630 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3632 if (!version_printed)
3633 show_whats_supported(stderr);
3637 /* When started with root privilege, ensure that the limits on the number of
3638 open files and the number of processes (where that is accessible) are
3639 sufficiently large, or are unset, in case Exim has been called from an
3640 environment where the limits are screwed down. Not all OS have the ability to
3641 change some of these limits. */
3645 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3651 #ifdef RLIMIT_NOFILE
3652 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3654 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3656 rlp.rlim_cur = rlp.rlim_max = 0;
3659 /* I originally chose 1000 as a nice big number that was unlikely to
3660 be exceeded. It turns out that some older OS have a fixed upper limit of
3663 if (rlp.rlim_cur < 1000)
3665 rlp.rlim_cur = rlp.rlim_max = 1000;
3666 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3668 rlp.rlim_cur = rlp.rlim_max = 256;
3669 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3670 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3677 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3679 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3681 rlp.rlim_cur = rlp.rlim_max = 0;
3684 #ifdef RLIM_INFINITY
3685 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3687 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3689 if (rlp.rlim_cur < 1000)
3691 rlp.rlim_cur = rlp.rlim_max = 1000;
3693 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3694 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3700 /* Exim is normally entered as root (but some special configurations are
3701 possible that don't do this). However, it always spins off sub-processes that
3702 set their uid and gid as required for local delivery. We don't want to pass on
3703 any extra groups that root may belong to, so we want to get rid of them all at
3706 We need to obey setgroups() at this stage, before possibly giving up root
3707 privilege for a changed configuration file, but later on we might need to
3708 check on the additional groups for the admin user privilege - can't do that
3709 till after reading the config, which might specify the exim gid. Therefore,
3710 save the group list here first. */
3712 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3713 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3715 /* There is a fundamental difference in some BSD systems in the matter of
3716 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3717 known not to be different. On the "different" systems there is a single group
3718 list, and the first entry in it is the current group. On all other versions of
3719 Unix there is a supplementary group list, which is in *addition* to the current
3720 group. Consequently, to get rid of all extraneous groups on a "standard" system
3721 you pass over 0 groups to setgroups(), while on a "different" system you pass
3722 over a single group - the current group, which is always the first group in the
3723 list. Calling setgroups() with zero groups on a "different" system results in
3724 an error return. The following code should cope with both types of system.
3726 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3727 the "setgroups() with zero groups" - and changes the egid.
3728 Thanks to that we had to stash the original_egid above, for use below
3729 in the call to exim_setugid().
3731 However, if this process isn't running as root, setgroups() can't be used
3732 since you have to be root to run it, even if throwing away groups.
3733 Except, sigh, for Hurd - where you can.
3734 Not being root here happens only in some unusual configurations. */
3737 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3738 && setgroups(0, NULL) != 0
3740 && setgroups(1, group_list) != 0)
3741 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3743 /* If the configuration file name has been altered by an argument on the
3744 command line (either a new file name or a macro definition) and the caller is
3745 not root, or if this is a filter testing run, remove any setuid privilege the
3746 program has and run as the underlying user.
3748 The exim user is locked out of this, which severely restricts the use of -C
3751 Otherwise, set the real ids to the effective values (should be root unless run
3752 from inetd, which it can either be root or the exim uid, if one is configured).
3754 There is a private mechanism for bypassing some of this, in order to make it
3755 possible to test lots of configurations automatically, without having either to
3756 recompile each time, or to patch in an actual configuration file name and other
3757 values (such as the path name). If running in the test harness, pretend that
3758 configuration file changes and macro definitions haven't happened. */
3761 (!f.trusted_config || /* Config changed, or */
3762 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3763 real_uid != root_uid && /* Not root, and */
3764 !f.running_in_test_harness /* Not fudged */
3766 expansion_test /* expansion testing */
3768 filter_test != FTEST_NONE) /* Filter testing */
3770 setgroups(group_count, group_list);
3771 exim_setugid(real_uid, real_gid, FALSE,
3772 US"-C, -D, -be or -bf forces real uid");
3773 removed_privilege = TRUE;
3775 /* In the normal case when Exim is called like this, stderr is available
3776 and should be used for any logging information because attempts to write
3777 to the log will usually fail. To arrange this, we unset really_exim. However,
3778 if no stderr is available there is no point - we might as well have a go
3779 at the log (if it fails, syslog will be written).
3781 Note that if the invoker is Exim, the logs remain available. Messing with
3782 this causes unlogged successful deliveries. */
3784 if (log_stderr && real_uid != exim_uid)
3785 f.really_exim = FALSE;
3788 /* Privilege is to be retained for the moment. It may be dropped later,
3789 depending on the job that this Exim process has been asked to do. For now, set
3790 the real uid to the effective so that subsequent re-execs of Exim are done by a
3794 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3796 /* If testing a filter, open the file(s) now, before wasting time doing other
3797 setups and reading the message. */
3799 if (filter_test & FTEST_SYSTEM)
3800 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3801 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3804 if (filter_test & FTEST_USER)
3805 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3806 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3809 /* Initialise lookup_list
3810 If debugging, already called above via version reporting.
3811 In either case, we initialise the list of available lookups while running
3812 as root. All dynamically modules are loaded from a directory which is
3813 hard-coded into the binary and is code which, if not a module, would be
3814 part of Exim already. Ability to modify the content of the directory
3815 is equivalent to the ability to modify a setuid binary!
3817 This needs to happen before we read the main configuration. */
3821 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3824 /* Read the main runtime configuration data; this gives up if there
3825 is a failure. It leaves the configuration file open so that the subsequent
3826 configuration data for delivery can be read if needed.
3828 NOTE: immediately after opening the configuration file we change the working
3829 directory to "/"! Later we change to $spool_directory. We do it there, because
3830 during readconf_main() some expansion takes place already. */
3832 /* Store the initial cwd before we change directories. Can be NULL if the
3833 dir has already been unlinked. */
3834 initial_cwd = os_getcwd(NULL, 0);
3837 -be[m] expansion test -
3838 -b[fF] filter test new
3840 -bmalware malware_test_file new
3842 -brw rewrite test new
3844 -bv[s] address verify -
3846 -bP <option> (except -bP config, which sets list_config)
3848 If any of these options is set, we suppress warnings about configuration
3849 issues (currently about tls_advertise_hosts and keep_environment not being
3853 #ifdef MEASURE_TIMING
3854 struct timeval t0, diff;
3855 (void)gettimeofday(&t0, NULL);
3858 readconf_main(checking || list_options);
3860 #ifdef MEASURE_TIMING
3861 report_time_since(&t0, US"readconf_main (delta)");
3866 /* Now in directory "/" */
3868 if (cleanup_environment() == FALSE)
3869 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3872 /* If an action on specific messages is requested, or if a daemon or queue
3873 runner is being started, we need to know if Exim was called by an admin user.
3874 This is the case if the real user is root or exim, or if the real group is
3875 exim, or if one of the supplementary groups is exim or a group listed in
3876 admin_groups. We don't fail all message actions immediately if not admin_user,
3877 since some actions can be performed by non-admin users. Instead, set admin_user
3878 for later interrogation. */
3880 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3881 f.admin_user = TRUE;
3883 for (int i = 0; i < group_count && !f.admin_user; i++)
3884 if (group_list[i] == exim_gid)
3885 f.admin_user = TRUE;
3886 else if (admin_groups)
3887 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3888 if (admin_groups[j] == group_list[i])
3889 f.admin_user = TRUE;
3891 /* Another group of privileged users are the trusted users. These are root,
3892 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3893 are permitted to specify sender_addresses with -f on the command line, and
3894 other message parameters as well. */
3896 if (real_uid == root_uid || real_uid == exim_uid)
3897 f.trusted_caller = TRUE;
3901 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3902 if (trusted_users[i] == real_uid)
3903 f.trusted_caller = TRUE;
3906 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3907 if (trusted_groups[i] == real_gid)
3908 f.trusted_caller = TRUE;
3909 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3910 if (trusted_groups[i] == group_list[j])
3911 f.trusted_caller = TRUE;
3914 /* At this point, we know if the user is privileged and some command-line
3915 options become possibly impermissible, depending upon the configuration file. */
3917 if (checking && commandline_checks_require_admin && !f.admin_user)
3918 exim_fail("exim: those command-line flags are set to require admin\n");
3920 /* Handle the decoding of logging options. */
3922 decode_bits(log_selector, log_selector_size, log_notall,
3923 log_selector_string, log_options, log_options_count, US"log", 0);
3927 debug_printf("configuration file is %s\n", config_main_filename);
3928 debug_printf("log selectors =");
3929 for (int i = 0; i < log_selector_size; i++)
3930 debug_printf(" %08x", log_selector[i]);
3934 /* If domain literals are not allowed, check the sender address that was
3935 supplied with -f. Ditto for a stripped trailing dot. */
3939 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3940 exim_fail("exim: bad -f address \"%s\": domain literals not "
3941 "allowed\n", sender_address);
3942 if (f_end_dot && !strip_trailing_dot)
3943 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3944 "(trailing dot not allowed)\n", sender_address);
3947 /* See if an admin user overrode our logging. */
3949 if (cmdline_syslog_name)
3952 syslog_processname = cmdline_syslog_name;
3953 log_file_path = string_copy(CUS"syslog");
3956 /* not a panic, non-privileged users should not be able to spam paniclog */
3958 "exim: you lack sufficient privilege to specify syslog process name\n");
3960 /* Paranoia check of maximum lengths of certain strings. There is a check
3961 on the length of the log file path in log.c, which will come into effect
3962 if there are any calls to write the log earlier than this. However, if we
3963 get this far but the string is very long, it is better to stop now than to
3964 carry on and (e.g.) receive a message and then have to collapse. The call to
3965 log_write() from here will cause the ultimate panic collapse if the complete
3966 file name exceeds the buffer length. */
3968 if (Ustrlen(log_file_path) > 200)
3969 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3970 "log_file_path is longer than 200 chars: aborting");
3972 if (Ustrlen(pid_file_path) > 200)
3973 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3974 "pid_file_path is longer than 200 chars: aborting");
3976 if (Ustrlen(spool_directory) > 200)
3977 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3978 "spool_directory is longer than 200 chars: aborting");
3980 /* Length check on the process name given to syslog for its TAG field,
3981 which is only permitted to be 32 characters or less. See RFC 3164. */
3983 if (Ustrlen(syslog_processname) > 32)
3984 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3985 "syslog_processname is longer than 32 chars: aborting");
3990 log_write(0, LOG_MAIN, "%s", log_oneline);
3991 return EXIT_SUCCESS;
3994 return EXIT_FAILURE;
3996 /* In some operating systems, the environment variable TMPDIR controls where
3997 temporary files are created; Exim doesn't use these (apart from when delivering
3998 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3999 If TMPDIR is found in the environment, reset it to the value defined in the
4000 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4001 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4002 EXIM_TMPDIR by the build scripts.
4006 if (environ) for (uschar ** p = USS environ; *p; p++)
4007 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4009 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4010 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4012 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4016 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4017 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4018 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4019 called by a user who has set the TZ variable. This then affects the timestamps
4020 in log files and in Received: headers, and any created Date: header lines. The
4021 required timezone is settable in the configuration file, so nothing can be done
4022 about this earlier - but hopefully nothing will normally be logged earlier than
4023 this. We have to make a new environment if TZ is wrong, but don't bother if
4024 timestamps_utc is set, because then all times are in UTC anyway. */
4026 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4027 f.timestamps_utc = TRUE;
4030 uschar *envtz = US getenv("TZ");
4032 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4033 : timezone_string != NULL
4036 uschar **p = USS environ;
4040 if (environ) while (*p++) count++;
4041 if (!envtz) count++;
4042 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4043 if (environ) for (p = USS environ; *p; p++)
4044 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4045 if (timezone_string)
4047 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4048 sprintf(CS *newp++, "TZ=%s", timezone_string);
4053 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4054 tod_stamp(tod_log));
4058 /* Handle the case when we have removed the setuid privilege because of -C or
4059 -D. This means that the caller of Exim was not root.
4061 There is a problem if we were running as the Exim user. The sysadmin may
4062 expect this case to retain privilege because "the binary was called by the
4063 Exim user", but it hasn't, because either the -D option set macros, or the
4064 -C option set a non-trusted configuration file. There are two possibilities:
4066 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4067 to do message deliveries. Thus, the fact that it is running as a
4068 non-privileged user is plausible, and might be wanted in some special
4069 configurations. However, really_exim will have been set false when
4070 privilege was dropped, to stop Exim trying to write to its normal log
4071 files. Therefore, re-enable normal log processing, assuming the sysadmin
4072 has set up the log directory correctly.
4074 (2) If deliver_drop_privilege is not set, the configuration won't work as
4075 apparently intended, and so we log a panic message. In order to retain
4076 root for -C or -D, the caller must either be root or be invoking a
4077 trusted configuration file (when deliver_drop_privilege is false). */
4079 if ( removed_privilege
4080 && (!f.trusted_config || opt_D_used)
4081 && real_uid == exim_uid)
4082 if (deliver_drop_privilege)
4083 f.really_exim = TRUE; /* let logging work normally */
4085 log_write(0, LOG_MAIN|LOG_PANIC,
4086 "exim user lost privilege for using %s option",
4087 f.trusted_config? "-D" : "-C");
4089 /* Start up Perl interpreter if Perl support is configured and there is a
4090 perl_startup option, and the configuration or the command line specifies
4091 initializing starting. Note that the global variables are actually called
4092 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4095 if (perl_start_option != 0)
4096 opt_perl_at_start = (perl_start_option > 0);
4097 if (opt_perl_at_start && opt_perl_startup != NULL)
4100 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4101 if ((errstr = init_perl(opt_perl_startup)))
4102 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4103 opt_perl_started = TRUE;
4105 #endif /* EXIM_PERL */
4107 /* Log the arguments of the call if the configuration file said so. This is
4108 a debugging feature for finding out what arguments certain MUAs actually use.
4109 Don't attempt it if logging is disabled, or if listing variables or if
4110 verifying/testing addresses or expansions. */
4112 if ( (debug_selector & D_any || LOGGING(arguments))
4113 && f.really_exim && !list_options && !checking)
4115 uschar *p = big_buffer;
4116 Ustrcpy(p, US"cwd= (failed)");
4122 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4123 p += 4 + Ustrlen(initial_cwd);
4124 /* in case p is near the end and we don't provide enough space for
4125 * string_format to be willing to write. */
4129 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4131 for (int i = 0; i < argc; i++)
4133 int len = Ustrlen(argv[i]);
4134 const uschar *printing;
4136 if (p + len + 8 >= big_buffer + big_buffer_size)
4138 Ustrcpy(p, US" ...");
4139 log_write(0, LOG_MAIN, "%s", big_buffer);
4140 Ustrcpy(big_buffer, US"...");
4143 printing = string_printing(argv[i]);
4144 if (!*printing) quote = US"\"";
4147 const uschar *pp = printing;
4149 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4151 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4152 (p - big_buffer) - 4), printing, quote);
4155 if (LOGGING(arguments))
4156 log_write(0, LOG_MAIN, "%s", big_buffer);
4158 debug_printf("%s\n", big_buffer);
4161 /* Set the working directory to be the top-level spool directory. We don't rely
4162 on this in the code, which always uses fully qualified names, but it's useful
4163 for core dumps etc. Don't complain if it fails - the spool directory might not
4164 be generally accessible and calls with the -C option (and others) have lost
4165 privilege by now. Before the chdir, we try to ensure that the directory exists.
4168 if (Uchdir(spool_directory) != 0)
4170 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4171 (void) Uchdir(spool_directory);
4174 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4175 alias file. Exim doesn't have such a concept, but this call is screwed into
4176 Sun's YP makefiles. Handle this by calling a configured script, as the real
4177 user who called Exim. The -oA option can be used to pass an argument to the
4182 (void) fclose(config_file);
4183 if (bi_command && *bi_command)
4187 argv[i++] = bi_command;
4188 if (alias_arg) argv[i++] = alias_arg;
4191 setgroups(group_count, group_list);
4192 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4194 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4195 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4197 execv(CS argv[0], (char *const *)argv);
4198 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4202 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4207 /* We moved the admin/trusted check to be immediately after reading the
4208 configuration file. We leave these prints here to ensure that syslog setup,
4209 logfile setup, and so on has already happened. */
4211 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4212 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4214 /* Only an admin user may start the daemon or force a queue run in the default
4215 configuration, but the queue run restriction can be relaxed. Only an admin
4216 user may request that a message be returned to its sender forthwith. Only an
4217 admin user may specify a debug level greater than D_v (because it might show
4218 passwords, etc. in lookup queries). Only an admin user may request a queue
4219 count. Only an admin user can use the test interface to scan for email
4220 (because Exim will be in the spool dir and able to look at mails). */
4224 BOOL debugset = (debug_selector & ~D_v) != 0;
4225 if ( deliver_give_up || f.daemon_listen || malware_test_file
4226 || count_queue && queue_list_requires_admin
4227 || list_queue && queue_list_requires_admin
4228 || queue_interval >= 0 && prod_requires_admin
4229 || queue_name_dest && prod_requires_admin
4230 || debugset && !f.running_in_test_harness
4232 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4235 /* If the real user is not root or the exim uid, the argument for passing
4236 in an open TCP/IP connection for another message is not permitted, nor is
4237 running with the -N option for any delivery action, unless this call to exim is
4238 one that supplied an input message, or we are using a patched exim for
4239 regression testing. */
4241 if ( real_uid != root_uid && real_uid != exim_uid
4242 && ( continue_hostname
4244 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4246 && !f.running_in_test_harness
4248 exim_fail("exim: Permission denied\n");
4250 /* If the caller is not trusted, certain arguments are ignored when running for
4251 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4252 Note that authority for performing certain actions on messages is tested in the
4253 queue_action() function. */
4255 if (!f.trusted_caller && !checking)
4257 sender_host_name = sender_host_address = interface_address =
4258 sender_ident = received_protocol = NULL;
4259 sender_host_port = interface_port = 0;
4260 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4263 /* If a sender host address is set, extract the optional port number off the
4264 end of it and check its syntax. Do the same thing for the interface address.
4265 Exim exits if the syntax is bad. */
4269 if (sender_host_address)
4270 sender_host_port = check_port(sender_host_address);
4271 if (interface_address)
4272 interface_port = check_port(interface_address);
4275 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4278 if (f.trusted_caller)
4280 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4281 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4284 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4287 /* If an SMTP message is being received check to see if the standard input is a
4288 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4289 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4294 union sockaddr_46 inetd_sock;
4295 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4296 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4298 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4299 if (family == AF_INET || family == AF_INET6)
4301 union sockaddr_46 interface_sock;
4302 size = sizeof(interface_sock);
4304 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4305 interface_address = host_ntoa(-1, &interface_sock, NULL,
4308 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4310 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4313 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4314 NULL, &sender_host_port);
4315 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4316 "inetd is not supported when mua_wrapper is set");
4320 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4325 /* If the load average is going to be needed while receiving a message, get it
4326 now for those OS that require the first call to os_getloadavg() to be done as
4327 root. There will be further calls later for each message received. */
4329 #ifdef LOAD_AVG_NEEDS_ROOT
4330 if ( receiving_message
4331 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4332 load_average = OS_GETLOADAVG();
4335 /* The queue_only configuration option can be overridden by -odx on the command
4336 line, except that if queue_only_override is false, queue_only cannot be unset
4337 from the command line. */
4339 if (queue_only_set && (queue_only_override || arg_queue_only))
4340 queue_only = arg_queue_only;
4342 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4345 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4346 if (arg_smtp_receive_timeout >= 0)
4347 smtp_receive_timeout = arg_smtp_receive_timeout;
4349 /* If Exim was started with root privilege, unless we have already removed the
4350 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4351 except when starting the daemon or doing some kind of delivery or address
4352 testing (-bt). These are the only cases when root need to be retained. We run
4353 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4354 retained only for starting the daemon. We always do the initgroups() in this
4355 situation (controlled by the TRUE below), in order to be as close as possible
4356 to the state Exim usually runs in. */
4358 if ( !unprivileged /* originally had root AND */
4359 && !removed_privilege /* still got root AND */
4360 && !f.daemon_listen /* not starting the daemon */
4361 && queue_interval <= 0 /* (either kind of daemon) */
4362 && ( /* AND EITHER */
4363 deliver_drop_privilege /* requested unprivileged */
4365 queue_interval < 0 /* not running the queue */
4366 && ( msg_action_arg < 0 /* and */
4367 || msg_action != MSG_DELIVER /* not delivering */
4369 && (!checking || !f.address_test_mode) /* not address checking */
4370 && !rcpt_verify_quota /* and not quota checking */
4372 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4374 /* When we are retaining a privileged uid, we still change to the exim gid. */
4379 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4380 rv = setgid(exim_gid);
4381 /* Impact of failure is that some stuff might end up with an incorrect group.
4382 We track this for failures from root, since any attempt to change privilege
4383 by root should succeed and failures should be examined. For non-root,
4384 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4385 no need to complain then. */
4387 if (!(unprivileged || removed_privilege))
4388 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4391 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4392 (long int)exim_gid, strerror(errno));
4396 /* Handle a request to scan a file for malware */
4397 if (malware_test_file)
4399 #ifdef WITH_CONTENT_SCAN
4401 set_process_info("scanning file for malware");
4402 if ((result = malware_in_file(malware_test_file)) == FAIL)
4404 printf("No malware found.\n");
4409 printf("Malware lookup returned non-okay/fail: %d\n", result);
4413 printf("Malware found: %s\n", malware_name);
4415 printf("Malware scan detected malware of unknown name.\n");
4417 printf("Malware scanning not enabled at compile time.\n");
4422 /* Handle a request to list the delivery queue */
4426 set_process_info("listing the queue");
4427 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4431 /* Handle a request to count the delivery queue */
4435 set_process_info("counting the queue");
4436 fprintf(stdout, "%u\n", queue_count());
4440 /* Handle actions on specific messages, except for the force delivery and
4441 message load actions, which are done below. Some actions take a whole list of
4442 message ids, which are known to continue up to the end of the arguments. Others
4443 take a single message id and then operate on the recipients list. */
4445 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4447 int yield = EXIT_SUCCESS;
4448 set_process_info("acting on specified messages");
4450 /* ACL definitions may be needed when removing a message (-Mrm) because
4451 event_action gets expanded */
4453 if (msg_action == MSG_REMOVE)
4456 if (!one_msg_action)
4458 for (i = msg_action_arg; i < argc; i++)
4459 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4460 yield = EXIT_FAILURE;
4463 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4464 default: printf("\n"); break;
4468 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4469 recipients_arg)) yield = EXIT_FAILURE;
4473 /* We used to set up here to skip reading the ACL section, on
4474 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4475 Now, since the intro of the ${acl } expansion, ACL definitions may be
4476 needed in transports so we lost the optimisation. */
4479 #ifdef MEASURE_TIMING
4480 struct timeval t0, diff;
4481 (void)gettimeofday(&t0, NULL);
4486 #ifdef MEASURE_TIMING
4487 report_time_since(&t0, US"readconf_rest (delta)");
4491 /* Handle a request to check quota */
4492 if (rcpt_verify_quota)
4493 if (real_uid != root_uid && real_uid != exim_uid)
4494 exim_fail("exim: Permission denied\n");
4495 else if (recipients_arg >= argc)
4496 exim_fail("exim: missing recipient for quota check\n");
4499 verify_quota(argv[recipients_arg]);
4500 exim_exit(EXIT_SUCCESS);
4503 /* Handle the -brt option. This is for checking out retry configurations.
4504 The next three arguments are a domain name or a complete address, and
4505 optionally two error numbers. All it does is to call the function that
4506 scans the retry configuration data. */
4508 if (test_retry_arg >= 0)
4510 retry_config *yield;
4511 int basic_errno = 0;
4515 if (test_retry_arg >= argc)
4517 printf("-brt needs a domain or address argument\n");
4518 exim_exit(EXIT_FAILURE);
4520 s1 = argv[test_retry_arg++];
4523 /* If the first argument contains no @ and no . it might be a local user
4524 or it might be a single-component name. Treat as a domain. */
4526 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4528 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4529 "being \ntreated as a one-component domain, not as a local part.\n\n",
4533 /* There may be an optional second domain arg. */
4535 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4536 s2 = argv[test_retry_arg++];
4538 /* The final arg is an error name */
4540 if (test_retry_arg < argc)
4542 uschar *ss = argv[test_retry_arg];
4544 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4547 printf("%s\n", CS error);
4548 return EXIT_FAILURE;
4551 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4552 code > 100 as an error is for matching codes to the decade. Turn them into
4553 a real error code, off the decade. */
4555 if (basic_errno == ERRNO_MAIL4XX ||
4556 basic_errno == ERRNO_RCPT4XX ||
4557 basic_errno == ERRNO_DATA4XX)
4559 int code = (more_errno >> 8) & 255;
4561 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4562 else if (code > 100)
4563 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4567 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4568 printf("No retry information found\n");
4571 more_errno = yield->more_errno;
4572 printf("Retry rule: %s ", yield->pattern);
4574 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4576 printf("quota%s%s ",
4577 (more_errno > 0)? "_" : "",
4578 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4580 else if (yield->basic_errno == ECONNREFUSED)
4582 printf("refused%s%s ",
4583 (more_errno > 0)? "_" : "",
4584 (more_errno == 'M')? "MX" :
4585 (more_errno == 'A')? "A" : "");
4587 else if (yield->basic_errno == ETIMEDOUT)
4590 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4592 if (more_errno != 0) printf("_%s",
4593 (more_errno == 'M')? "MX" : "A");
4596 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4597 printf("auth_failed ");
4600 for (retry_rule * r = yield->rules; r; r = r->next)
4602 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4603 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4609 printf(",%d.", x/1000);
4623 exim_exit(EXIT_SUCCESS);
4626 /* Handle a request to list one or more configuration options */
4627 /* If -n was set, we suppress some information */
4632 set_process_info("listing variables");
4633 if (recipients_arg >= argc)
4634 fail = !readconf_print(US"all", NULL, flag_n);
4635 else for (i = recipients_arg; i < argc; i++)
4638 (Ustrcmp(argv[i], "router") == 0 ||
4639 Ustrcmp(argv[i], "transport") == 0 ||
4640 Ustrcmp(argv[i], "authenticator") == 0 ||
4641 Ustrcmp(argv[i], "macro") == 0 ||
4642 Ustrcmp(argv[i], "environment") == 0))
4644 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4648 fail = !readconf_print(argv[i], NULL, flag_n);
4650 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4655 set_process_info("listing config");
4656 exim_exit(readconf_print(US"config", NULL, flag_n)
4657 ? EXIT_SUCCESS : EXIT_FAILURE);
4661 /* Initialise subsystems as required. */
4665 /* Handle a request to deliver one or more messages that are already on the
4666 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4667 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4669 Delivery of specific messages is typically used for a small number when
4670 prodding by hand (when the option forced_delivery will be set) or when
4671 re-execing to regain root privilege. Each message delivery must happen in a
4672 separate process, so we fork a process for each one, and run them sequentially
4673 so that debugging output doesn't get intertwined, and to avoid spawning too
4674 many processes if a long list is given. However, don't fork for the last one;
4675 this saves a process in the common case when Exim is called to deliver just one
4678 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4680 if (prod_requires_admin && !f.admin_user)
4682 fprintf(stderr, "exim: Permission denied\n");
4683 exim_exit(EXIT_FAILURE);
4685 set_process_info("delivering specified messages");
4686 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4687 for (i = msg_action_arg; i < argc; i++)
4691 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4692 that runs into a later copy into the untainted global message_id[] */
4694 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4695 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4697 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4698 exim_underbar_exit(EXIT_SUCCESS);
4702 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4704 exim_exit(EXIT_FAILURE);
4708 exim_exit(EXIT_SUCCESS);
4712 /* If only a single queue run is requested, without SMTP listening, we can just
4713 turn into a queue runner, with an optional starting message id. */
4715 if (queue_interval == 0 && !f.daemon_listen)
4717 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4718 start_queue_run_id ? US" starting at " : US"",
4719 start_queue_run_id ? start_queue_run_id: US"",
4720 stop_queue_run_id ? US" stopping at " : US"",
4721 stop_queue_run_id ? stop_queue_run_id : US"");
4723 set_process_info("running the '%s' queue (single queue run)", queue_name);
4725 set_process_info("running the queue (single queue run)");
4726 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4727 exim_exit(EXIT_SUCCESS);
4731 /* Find the login name of the real user running this process. This is always
4732 needed when receiving a message, because it is written into the spool file. It
4733 may also be used to construct a from: or a sender: header, and in this case we
4734 need the user's full name as well, so save a copy of it, checked for RFC822
4735 syntax and munged if necessary, if it hasn't previously been set by the -F
4736 argument. We may try to get the passwd entry more than once, in case NIS or
4737 other delays are in evidence. Save the home directory for use in filter testing
4742 if ((pw = getpwuid(real_uid)) != NULL)
4744 originator_login = string_copy(US pw->pw_name);
4745 originator_home = string_copy(US pw->pw_dir);
4747 /* If user name has not been set by -F, set it from the passwd entry
4748 unless -f has been used to set the sender address by a trusted user. */
4750 if (!originator_name)
4752 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4754 uschar *name = US pw->pw_gecos;
4755 uschar *amp = Ustrchr(name, '&');
4758 /* Most Unix specify that a '&' character in the gecos field is
4759 replaced by a copy of the login name, and some even specify that
4760 the first character should be upper cased, so that's what we do. */
4765 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4766 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4767 buffer[loffset] = toupper(buffer[loffset]);
4771 /* If a pattern for matching the gecos field was supplied, apply
4772 it and then expand the name string. */
4774 if (gecos_pattern && gecos_name)
4777 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4779 if (regex_match_and_setup(re, name, 0, -1))
4781 uschar *new_name = expand_string(gecos_name);
4785 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4786 "gecos field \"%s\"\n", new_name, name);
4789 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4790 "\"%s\": %s\n", gecos_name, expand_string_message);
4792 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4793 "gecos field \"%s\"\n", gecos_pattern, name);
4794 store_free((void *)re);
4796 originator_name = string_copy(name);
4799 /* A trusted caller has used -f but not -F */
4801 else originator_name = US"";
4804 /* Break the retry loop */
4809 if (++i > finduser_retries) break;
4813 /* If we cannot get a user login, log the incident and give up, unless the
4814 configuration specifies something to use. When running in the test harness,
4815 any setting of unknown_login overrides the actual name. */
4817 if (!originator_login || f.running_in_test_harness)
4821 originator_login = expand_string(unknown_login);
4822 if (!originator_name && unknown_username)
4823 originator_name = expand_string(unknown_username);
4824 if (!originator_name) originator_name = US"";
4826 if (!originator_login)
4827 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4831 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4834 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4836 /* If a message is created by this call of Exim, the uid/gid of its originator
4837 are those of the caller. These values are overridden if an existing message is
4838 read in from the spool. */
4840 originator_uid = real_uid;
4841 originator_gid = real_gid;
4843 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4844 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4846 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4847 returns. We leave this till here so that the originator_ fields are available
4848 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4851 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4855 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4856 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4857 "mua_wrapper is set");
4860 # ifndef DISABLE_TLS
4861 /* This also checks that the library linkage is working and we can call
4862 routines in it, so call even if tls_require_ciphers is unset */
4864 # ifdef MEASURE_TIMING
4865 struct timeval t0, diff;
4866 (void)gettimeofday(&t0, NULL);
4868 if (!tls_dropprivs_validate_require_cipher(FALSE))
4870 # ifdef MEASURE_TIMING
4871 report_time_since(&t0, US"validate_ciphers (delta)");
4879 /* If the sender ident has not been set (by a trusted caller) set it to
4880 the caller. This will get overwritten below for an inetd call. If a trusted
4881 caller has set it empty, unset it. */
4883 if (!sender_ident) sender_ident = originator_login;
4884 else if (!*sender_ident) sender_ident = NULL;
4886 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4887 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4888 originator_* variables set. */
4890 if (test_rewrite_arg >= 0)
4892 f.really_exim = FALSE;
4893 if (test_rewrite_arg >= argc)
4895 printf("-brw needs an address argument\n");
4896 exim_exit(EXIT_FAILURE);
4898 rewrite_test(argv[test_rewrite_arg]);
4899 exim_exit(EXIT_SUCCESS);
4902 /* A locally-supplied message is considered to be coming from a local user
4903 unless a trusted caller supplies a sender address with -f, or is passing in the
4904 message via SMTP (inetd invocation or otherwise). */
4906 if ( !sender_address && !smtp_input
4907 || !f.trusted_caller && filter_test == FTEST_NONE)
4909 f.sender_local = TRUE;
4911 /* A trusted caller can supply authenticated_sender and authenticated_id
4912 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4913 defaults except when host checking. */
4915 if (!authenticated_sender && !host_checking)
4916 authenticated_sender = string_sprintf("%s@%s", originator_login,
4917 qualify_domain_sender);
4918 if (!authenticated_id && !host_checking)
4919 authenticated_id = originator_login;
4922 /* Trusted callers are always permitted to specify the sender address.
4923 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4924 is specified is the empty address. However, if a trusted caller does not
4925 specify a sender address for SMTP input, we leave sender_address unset. This
4926 causes the MAIL commands to be honoured. */
4928 if ( !smtp_input && !sender_address
4929 || !receive_check_set_sender(sender_address))
4931 /* Either the caller is not permitted to set a general sender, or this is
4932 non-SMTP input and the trusted caller has not set a sender. If there is no
4933 sender, or if a sender other than <> is set, override with the originator's
4934 login (which will get qualified below), except when checking things. */
4936 if ( !sender_address /* No sender_address set */
4938 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4939 !checking)) /* Not running tests, including filter tests */
4941 sender_address = originator_login;
4942 f.sender_address_forced = FALSE;
4943 sender_address_domain = 0;
4947 /* Remember whether an untrusted caller set the sender address */
4949 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4951 /* Ensure that the sender address is fully qualified unless it is the empty
4952 address, which indicates an error message, or doesn't exist (root caller, smtp
4953 interface, no -f argument). */
4955 if (sender_address && *sender_address && sender_address_domain == 0)
4956 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4957 qualify_domain_sender);
4959 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4961 /* Handle a request to verify a list of addresses, or test them for delivery.
4962 This must follow the setting of the sender address, since routers can be
4963 predicated upon the sender. If no arguments are given, read addresses from
4964 stdin. Set debug_level to at least D_v to get full output for address testing.
4967 if (verify_address_mode || f.address_test_mode)
4970 int flags = vopt_qualify;
4972 if (verify_address_mode)
4974 if (!verify_as_sender) flags |= vopt_is_recipient;
4975 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4980 flags |= vopt_is_recipient;
4981 debug_selector |= D_v;
4982 debug_file = stderr;
4983 debug_fd = fileno(debug_file);
4984 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4987 if (recipients_arg < argc)
4988 while (recipients_arg < argc)
4990 /* Supplied addresses are tainted since they come from a user */
4991 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4994 BOOL finished = FALSE;
4995 uschar *ss = parse_find_address_end(s, FALSE);
4996 if (*ss == ',') *ss = 0; else finished = TRUE;
4997 test_address(s, flags, &exit_value);
5000 while (*++s == ',' || isspace(*s)) ;
5006 uschar * s = get_stdinput(NULL, NULL);
5008 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
5012 exim_exit(exit_value);
5015 /* Handle expansion checking. Either expand items on the command line, or read
5016 from stdin if there aren't any. If -Mset was specified, load the message so
5017 that its variables can be used, but restrict this facility to admin users.
5018 Otherwise, if -bem was used, read a message from stdin. */
5022 dns_init(FALSE, FALSE, FALSE);
5023 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5025 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
5027 exim_fail("exim: permission denied\n");
5028 message_id = argv[msg_action_arg];
5029 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
5030 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5031 printf ("Failed to load message datafile %s\n", message_id);
5032 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5033 printf ("Failed to load message %s\n", message_id);
5036 /* Read a test message from a file. We fudge it up to be on stdin, saving
5037 stdin itself for later reading of expansion strings. */
5039 else if (expansion_test_message)
5041 int save_stdin = dup(0);
5042 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5044 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5047 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5048 message_ended = END_NOTENDED;
5049 read_message_body(receive_msg(extract_recipients));
5050 message_linecount += body_linecount;
5051 (void)dup2(save_stdin, 0);
5052 (void)close(save_stdin);
5053 clearerr(stdin); /* Required by Darwin */
5056 /* Only admin users may see config-file macros this way */
5058 if (!f.admin_user) macros_user = macros = mlast = NULL;
5060 /* Allow $recipients for this testing */
5062 f.enable_dollar_recipients = TRUE;
5064 /* Expand command line items */
5066 if (recipients_arg < argc)
5067 while (recipients_arg < argc)
5068 expansion_test_line(argv[recipients_arg++]);
5074 char *(*fn_readline)(const char *) = NULL;
5075 void (*fn_addhist)(const char *) = NULL;
5079 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5082 while (s = get_stdinput(fn_readline, fn_addhist))
5083 expansion_test_line(s);
5086 if (dlhandle) dlclose(dlhandle);
5090 /* The data file will be open after -Mset */
5092 if (deliver_datafile >= 0)
5094 (void)close(deliver_datafile);
5095 deliver_datafile = -1;
5098 exim_exit(EXIT_SUCCESS);
5102 /* The active host name is normally the primary host name, but it can be varied
5103 for hosts that want to play several parts at once. We need to ensure that it is
5104 set for host checking, and for receiving messages. */
5106 smtp_active_hostname = primary_hostname;
5107 if (raw_active_hostname != NULL)
5109 uschar *nah = expand_string(raw_active_hostname);
5112 if (!f.expand_string_forcedfail)
5113 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5114 "(smtp_active_hostname): %s", raw_active_hostname,
5115 expand_string_message);
5117 else if (nah[0] != 0) smtp_active_hostname = nah;
5120 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5121 given IP address so that the blocking and relay configuration can be tested.
5122 Unless a sender_ident was set by -oMt, we discard it (the default is the
5123 caller's login name). An RFC 1413 call is made only if we are running in the
5124 test harness and an incoming interface and both ports are specified, because
5125 there is no TCP/IP call to find the ident for. */
5132 if (!sender_ident_set)
5134 sender_ident = NULL;
5135 if (f.running_in_test_harness && sender_host_port
5136 && interface_address && interface_port)
5137 verify_get_ident(1223); /* note hardwired port number */
5140 /* In case the given address is a non-canonical IPv6 address, canonicalize
5141 it. The code works for both IPv4 and IPv6, as it happens. */
5143 size = host_aton(sender_host_address, x);
5144 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5145 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5147 /* Now set up for testing */
5149 host_build_sender_fullhost();
5153 f.sender_local = FALSE;
5154 f.sender_host_notsocket = TRUE;
5155 debug_file = stderr;
5156 debug_fd = fileno(debug_file);
5157 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5158 "**** but without any ident (RFC 1413) callback.\n"
5159 "**** This is not for real!\n\n",
5160 sender_host_address);
5162 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5163 if (verify_check_host(&hosts_connection_nolog) == OK)
5164 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5165 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5167 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5168 because a log line has already been written for all its failure exists
5169 (usually "connection refused: <reason>") and writing another one is
5170 unnecessary clutter. */
5172 if (smtp_start_session())
5175 for (; (reset_point = store_mark()); store_reset(reset_point))
5177 if (smtp_setup_msg() <= 0) break;
5178 if (!receive_msg(FALSE)) break;
5180 return_path = sender_address = NULL;
5181 dnslist_domain = dnslist_matched = NULL;
5182 #ifndef DISABLE_DKIM
5183 dkim_cur_signer = NULL;
5186 deliver_localpart_orig = NULL;
5187 deliver_domain_orig = NULL;
5188 callout_address = sending_ip_address = NULL;
5189 deliver_localpart_data = deliver_domain_data =
5190 recipient_data = sender_data = NULL;
5191 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5195 exim_exit(EXIT_SUCCESS);
5199 /* Arrange for message reception if recipients or SMTP were specified;
5200 otherwise complain unless a version print (-bV) happened or this is a filter
5201 verification test or info dump.
5202 In the former case, show the configuration file name. */
5204 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5206 if (version_printed)
5208 if (Ustrchr(config_main_filelist, ':'))
5209 printf("Configuration file search path is %s\n", config_main_filelist);
5210 printf("Configuration file is %s\n", config_main_filename);
5211 return EXIT_SUCCESS;
5214 if (info_flag != CMDINFO_NONE)
5216 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5217 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5220 if (filter_test == FTEST_NONE)
5221 exim_usage(called_as);
5225 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5226 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5227 that we are not called from inetd, because that is rejected above. The
5228 following configuration settings are forced here:
5230 (1) Synchronous delivery (-odi)
5231 (2) Errors to stderr (-oep == -oeq)
5232 (3) No parallel remote delivery
5233 (4) Unprivileged delivery
5235 We don't force overall queueing options because there are several of them;
5236 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5237 to override any SMTP queueing. */
5241 f.synchronous_delivery = TRUE;
5242 arg_error_handling = ERRORS_STDERR;
5243 remote_max_parallel = 1;
5244 deliver_drop_privilege = TRUE;
5245 f.queue_smtp = FALSE;
5246 queue_smtp_domains = NULL;
5248 message_utf8_downconvert = -1; /* convert-if-needed */
5253 /* Prepare to accept one or more new messages on the standard input. When a
5254 message has been read, its id is returned in message_id[]. If doing immediate
5255 delivery, we fork a delivery process for each received message, except for the
5256 last one, where we can save a process switch.
5258 It is only in non-smtp mode that error_handling is allowed to be changed from
5259 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5260 sendmail error modes other than -oem ever actually used? Later: yes.) */
5262 if (!smtp_input) error_handling = arg_error_handling;
5264 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5265 logging being sent down the socket and make an identd call to get the
5268 else if (f.is_inetd)
5270 (void)fclose(stderr);
5271 exim_nullstd(); /* Re-open to /dev/null */
5272 verify_get_ident(IDENT_PORT);
5273 host_build_sender_fullhost();
5274 set_process_info("handling incoming connection from %s via inetd",
5278 /* If the sender host address has been set, build sender_fullhost if it hasn't
5279 already been done (which it will have been for inetd). This caters for the
5280 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5281 so that the test for IP options is skipped for -bs input. */
5283 if (sender_host_address && !sender_fullhost)
5285 host_build_sender_fullhost();
5286 set_process_info("handling incoming connection from %s via -oMa",
5288 f.sender_host_notsocket = TRUE;
5291 /* Otherwise, set the sender host as unknown except for inetd calls. This
5292 prevents host checking in the case of -bs not from inetd and also for -bS. */
5294 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5296 /* If stdout does not exist, then dup stdin to stdout. This can happen
5297 if exim is started from inetd. In this case fd 0 will be set to the socket,
5298 but fd 1 will not be set. This also happens for passed SMTP channels. */
5300 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5302 /* Set up the incoming protocol name and the state of the program. Root is
5303 allowed to force received protocol via the -oMr option above. If we have come
5304 via inetd, the process info has already been set up. We don't set
5305 received_protocol here for smtp input, as it varies according to
5306 batch/HELO/EHLO/AUTH/TLS. */
5310 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5311 smtp_batched_input? "batched " : "",
5312 (sender_address!= NULL)? sender_address : originator_login);
5316 int old_pool = store_pool;
5317 store_pool = POOL_PERM;
5318 if (!received_protocol)
5319 received_protocol = string_sprintf("local%s", called_as);
5320 store_pool = old_pool;
5321 set_process_info("accepting a local non-SMTP message from <%s>",
5325 /* Initialize the session_local_queue-only flag (this will be ignored if
5326 mua_wrapper is set) */
5329 session_local_queue_only = queue_only;
5331 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5332 the spool if so configured. On failure, we must not attempt to send an error
5333 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5334 error code is given.) */
5336 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5337 exim_fail("exim: insufficient disk space\n");
5339 /* If this is smtp input of any kind, real or batched, handle the start of the
5342 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5343 because a log line has already been written for all its failure exists
5344 (usually "connection refused: <reason>") and writing another one is
5345 unnecessary clutter. */
5351 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5352 if (verify_check_host(&hosts_connection_nolog) == OK)
5353 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5354 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5355 if (!smtp_start_session())
5358 exim_exit(EXIT_SUCCESS);
5362 /* Otherwise, set up the input size limit here. */
5366 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5367 if (expand_string_message)
5368 if (thismessage_size_limit == -1)
5369 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5370 "message_size_limit: %s", expand_string_message);
5372 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5373 "message_size_limit: %s", expand_string_message);
5376 /* Loop for several messages when reading SMTP input. If we fork any child
5377 processes, we don't want to wait for them unless synchronous delivery is
5378 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5379 same as SIG_DFL, despite the fact that documentation often lists the default as
5380 "ignore". This is a confusing area. This is what I know:
5382 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5383 processes that complete simply to go away without ever becoming defunct. You
5384 can't then wait for them - but we don't want to wait for them in the
5385 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5386 happen for all OS (e.g. *BSD is different).
5388 But that's not the end of the story. Some (many? all?) systems have the
5389 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5390 has by default, so it seems that the difference is merely one of default
5391 (compare restarting vs non-restarting signals).
5393 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5394 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5395 of the loop below. Paranoia rules.
5397 February 2003: That's *still* not the end of the story. There are now versions
5398 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5399 process then calls waitpid(), a grumble is written to the system log, because
5400 this is logically inconsistent. In other words, it doesn't like the paranoia.
5401 As a consequence of this, the waitpid() below is now excluded if we are sure
5402 that SIG_IGN works. */
5404 if (!f.synchronous_delivery)
5407 struct sigaction act;
5408 act.sa_handler = SIG_IGN;
5409 sigemptyset(&(act.sa_mask));
5410 act.sa_flags = SA_NOCLDWAIT;
5411 sigaction(SIGCHLD, &act, NULL);
5413 signal(SIGCHLD, SIG_IGN);
5417 /* Save the current store pool point, for resetting at the start of
5418 each message, and save the real sender address, if any. */
5420 real_sender_address = sender_address;
5422 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5423 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5428 rmark reset_point = store_mark();
5431 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5432 input and build the recipients list, before calling receive_msg() to read the
5433 message proper. Whatever sender address is given in the SMTP transaction is
5434 often ignored for local senders - we use the actual sender, which is normally
5435 either the underlying user running this process or a -f argument provided by
5436 a trusted caller. It is saved in real_sender_address. The test for whether to
5437 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5442 if ((rc = smtp_setup_msg()) > 0)
5444 if (real_sender_address != NULL &&
5445 !receive_check_set_sender(sender_address))
5447 sender_address = raw_sender = real_sender_address;
5448 sender_address_unrewritten = NULL;
5451 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5452 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5453 the very end. The result of the ACL is ignored (as for other non-SMTP
5454 messages). It is run for its potential side effects. */
5456 if (smtp_batched_input && acl_not_smtp_start != NULL)
5458 uschar *user_msg, *log_msg;
5459 f.enable_dollar_recipients = TRUE;
5460 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5461 &user_msg, &log_msg);
5462 f.enable_dollar_recipients = FALSE;
5465 /* Now get the data for the message */
5467 more = receive_msg(extract_recipients);
5468 if (message_id[0] == 0)
5470 cancel_cutthrough_connection(TRUE, US"receive dropped");
5471 if (more) goto moreloop;
5472 smtp_log_no_mail(); /* Log no mail if configured */
5473 exim_exit(EXIT_FAILURE);
5478 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5479 smtp_log_no_mail(); /* Log no mail if configured */
5480 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5484 /* In the non-SMTP case, we have all the information from the command
5485 line, but must process it in case it is in the more general RFC822
5486 format, and in any case, to detect syntax errors. Also, it appears that
5487 the use of comma-separated lists as single arguments is common, so we
5488 had better support them. */
5493 int count = argc - recipients_arg;
5494 uschar **list = argv + recipients_arg;
5496 /* These options cannot be changed dynamically for non-SMTP messages */
5498 f.active_local_sender_retain = local_sender_retain;
5499 f.active_local_from_check = local_from_check;
5501 /* Save before any rewriting */
5503 raw_sender = string_copy(sender_address);
5505 /* Loop for each argument (supplied by user hence tainted) */
5507 for (int i = 0; i < count; i++)
5509 int start, end, domain;
5511 uschar * s = string_copy_taint(list[i], TRUE);
5513 /* Loop for each comma-separated address */
5517 BOOL finished = FALSE;
5519 uschar *ss = parse_find_address_end(s, FALSE);
5521 if (*ss == ',') *ss = 0; else finished = TRUE;
5523 /* Check max recipients - if -t was used, these aren't recipients */
5525 if (recipients_max > 0 && ++rcount > recipients_max &&
5526 !extract_recipients)
5527 if (error_handling == ERRORS_STDERR)
5529 fprintf(stderr, "exim: too many recipients\n");
5530 exim_exit(EXIT_FAILURE);
5534 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5535 errors_sender_rc : EXIT_FAILURE;
5539 BOOL b = allow_utf8_domains;
5540 allow_utf8_domains = TRUE;
5543 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5546 if (string_is_utf8(recipient))
5547 message_smtputf8 = TRUE;
5549 allow_utf8_domains = b;
5552 if (domain == 0 && !f.allow_unqualified_recipient)
5555 errmess = US"unqualified recipient address not allowed";
5559 if (error_handling == ERRORS_STDERR)
5561 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5562 string_printing(list[i]), errmess);
5563 exim_exit(EXIT_FAILURE);
5569 eblock.text1 = string_printing(list[i]);
5570 eblock.text2 = errmess;
5572 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5573 errors_sender_rc : EXIT_FAILURE;
5576 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5579 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5583 /* Show the recipients when debugging */
5587 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5588 if (recipients_list)
5590 debug_printf("Recipients:\n");
5591 for (int i = 0; i < recipients_count; i++)
5592 debug_printf(" %s\n", recipients_list[i].address);
5596 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5597 ignored; rejecting here would just add complication, and it can just as
5598 well be done later. Allow $recipients to be visible in the ACL. */
5600 if (acl_not_smtp_start)
5602 uschar *user_msg, *log_msg;
5603 f.enable_dollar_recipients = TRUE;
5604 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5605 &user_msg, &log_msg);
5606 f.enable_dollar_recipients = FALSE;
5609 /* Pause for a while waiting for input. If none received in that time,
5610 close the logfile, if we had one open; then if we wait for a long-running
5611 datasource (months, in one use-case) log rotation will not leave us holding
5614 if (!receive_timeout)
5616 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5619 FD_ZERO(&r); FD_SET(0, &r);
5620 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5623 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5624 will just read the headers for the message, and not write anything onto the
5627 message_ended = END_NOTENDED;
5628 more = receive_msg(extract_recipients);
5630 /* more is always FALSE here (not SMTP message) when reading a message
5631 for real; when reading the headers of a message for filter testing,
5632 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5634 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5635 } /* Non-SMTP message reception */
5637 /* If this is a filter testing run, there are headers in store, but
5638 no message on the spool. Run the filtering code in testing mode, setting
5639 the domain to the qualify domain and the local part to the current user,
5640 unless they have been set by options. The prefix and suffix are left unset
5641 unless specified. The the return path is set to to the sender unless it has
5642 already been set from a return-path header in the message. */
5644 if (filter_test != FTEST_NONE)
5646 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5647 deliver_domain_orig = deliver_domain;
5648 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5649 deliver_localpart_orig = deliver_localpart;
5650 deliver_localpart_prefix = ftest_prefix;
5651 deliver_localpart_suffix = ftest_suffix;
5652 deliver_home = originator_home;
5656 printf("Return-path copied from sender\n");
5657 return_path = string_copy(sender_address);
5660 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5661 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5663 receive_add_recipient(
5664 string_sprintf("%s%s%s@%s",
5665 ftest_prefix ? ftest_prefix : US"",
5667 ftest_suffix ? ftest_suffix : US"",
5668 deliver_domain), -1);
5670 printf("Recipient = %s\n", recipients_list[0].address);
5671 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5672 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5674 if (chdir("/")) /* Get away from wherever the user is running this from */
5676 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5677 exim_exit(EXIT_FAILURE);
5680 /* Now we run either a system filter test, or a user filter test, or both.
5681 In the latter case, headers added by the system filter will persist and be
5682 available to the user filter. We need to copy the filter variables
5685 if (filter_test & FTEST_SYSTEM)
5686 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5687 exim_exit(EXIT_FAILURE);
5689 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5691 if (filter_test & FTEST_USER)
5692 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5693 exim_exit(EXIT_FAILURE);
5695 exim_exit(EXIT_SUCCESS);
5698 /* Else act on the result of message reception. We should not get here unless
5699 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5700 will be TRUE. If it is not, check on the number of messages received in this
5703 if ( !session_local_queue_only
5704 && smtp_accept_queue_per_connection > 0
5705 && receive_messagecount > smtp_accept_queue_per_connection)
5707 session_local_queue_only = TRUE;
5708 queue_only_reason = 2;
5711 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5712 and queue_only_load is set, check that the load average is below it. If it is
5713 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5714 default), we put the whole session into queue_only mode. It then remains this
5715 way for any subsequent messages on the same SMTP connection. This is a
5716 deliberate choice; even though the load average may fall, it doesn't seem
5717 right to deliver later messages on the same call when not delivering earlier
5718 ones. However, there are odd cases where this is not wanted, so this can be
5719 changed by setting queue_only_load_latch false. */
5721 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5722 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5724 queue_only_reason = 3;
5725 if (queue_only_load_latch) session_local_queue_only = TRUE;
5728 /* If running as an MUA wrapper, all queueing options and freezing options
5732 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5734 /* Log the queueing here, when it will get a message id attached, but
5735 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5738 if (local_queue_only)
5740 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5741 switch(queue_only_reason)
5744 log_write(L_delay_delivery,
5745 LOG_MAIN, "no immediate delivery: more than %d messages "
5746 "received in one connection", smtp_accept_queue_per_connection);
5750 log_write(L_delay_delivery,
5751 LOG_MAIN, "no immediate delivery: load average %.2f",
5752 (double)load_average/1000.0);
5757 else if (f.queue_only_policy || f.deliver_freeze)
5758 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5760 /* Else do the delivery unless the ACL or local_scan() called for queue only
5761 or froze the message. Always deliver in a separate process. A fork failure is
5762 not a disaster, as the delivery will eventually happen on a subsequent queue
5763 run. The search cache must be tidied before the fork, as the parent will
5764 do it before exiting. The child will trigger a lookup failure and
5765 thereby defer the delivery if it tries to use (for example) a cached ldap
5766 connection that the parent has called unbind on. */
5773 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5776 close_unwanted(); /* Close unwanted file descriptors and TLS */
5777 exim_nullstd(); /* Ensure std{in,out,err} exist */
5779 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5780 mode, deliver_drop_privilege is forced TRUE). */
5782 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5784 delivery_re_exec(CEE_EXEC_EXIT);
5785 /* Control does not return here. */
5788 /* No need to re-exec */
5790 rc = deliver_message(message_id, FALSE, FALSE);
5792 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5793 ? EXIT_SUCCESS : EXIT_FAILURE);
5798 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5799 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5800 "process: %s", strerror(errno));
5804 release_cutthrough_connection(US"msg passed for delivery");
5806 /* In the parent, wait if synchronous delivery is required. This will
5807 always be the case in MUA wrapper mode. */
5809 if (f.synchronous_delivery)
5812 while (wait(&status) != pid);
5813 if ((status & 0x00ff) != 0)
5814 log_write(0, LOG_MAIN|LOG_PANIC,
5815 "process %d crashed with signal %d while delivering %s",
5816 (int)pid, status & 0x00ff, message_id);
5817 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5822 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5823 automatically reaps children (see comments above the loop), clear away any
5824 finished subprocesses here, in case there are lots of messages coming in
5825 from the same source. */
5827 #ifndef SIG_IGN_WORKS
5828 while (waitpid(-1, NULL, WNOHANG) > 0);
5832 return_path = sender_address = NULL;
5833 authenticated_sender = NULL;
5834 deliver_localpart_orig = NULL;
5835 deliver_domain_orig = NULL;
5836 deliver_host = deliver_host_address = NULL;
5837 dnslist_domain = dnslist_matched = NULL;
5838 #ifdef WITH_CONTENT_SCAN
5839 malware_name = NULL;
5841 callout_address = NULL;
5842 sending_ip_address = NULL;
5843 deliver_localpart_data = deliver_domain_data =
5844 recipient_data = sender_data = NULL;
5846 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5848 store_reset(reset_point);
5851 exim_exit(EXIT_SUCCESS); /* Never returns */
5852 return 0; /* To stop compiler warning */