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 exim_gettime(&now_tv);
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);
1141 #ifdef SUPPORT_DMARC
1142 dmarc_version_report(fp);
1145 spf_lib_version_report(fp);
1148 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1149 if (authi->version_report)
1150 (*authi->version_report)(fp);
1152 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1153 characters; unless it's an ancient version of PCRE in which case it
1155 #ifndef PCRE_PRERELEASE
1156 # define PCRE_PRERELEASE
1159 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1160 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1162 PCRE_MAJOR, PCRE_MINOR,
1163 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1166 #undef EXPAND_AND_QUOTE
1169 for (int i = 0; i < lookup_list_count; i++)
1170 if (lookup_list[i]->version_report)
1171 lookup_list[i]->version_report(fp);
1173 #ifdef WHITELIST_D_MACROS
1174 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1176 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1178 #ifdef TRUSTED_CONFIG_LIST
1179 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1181 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1185 store_reset(reset_point);
1189 /*************************************************
1190 * Show auxiliary information about Exim *
1191 *************************************************/
1194 show_exim_information(enum commandline_info request, FILE *stream)
1199 fprintf(stream, "Oops, something went wrong.\n");
1203 "The -bI: flag takes a string indicating which information to provide.\n"
1204 "If the string is not recognised, you'll get this help (on stderr).\n"
1206 " exim -bI:help this information\n"
1207 " exim -bI:dscp list of known dscp value keywords\n"
1208 " exim -bI:sieve list of supported sieve extensions\n"
1212 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1213 fprintf(stream, "%s\n", *pp);
1216 dscp_list_to_stream(stream);
1222 /*************************************************
1223 * Quote a local part *
1224 *************************************************/
1226 /* This function is used when a sender address or a From: or Sender: header
1227 line is being created from the caller's login, or from an authenticated_id. It
1228 applies appropriate quoting rules for a local part.
1230 Argument: the local part
1231 Returns: the local part, quoted if necessary
1235 local_part_quote(uschar *lpart)
1237 BOOL needs_quote = FALSE;
1240 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1242 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1243 (*t != '.' || t == lpart || t[1] == 0);
1246 if (!needs_quote) return lpart;
1248 g = string_catn(NULL, US"\"", 1);
1252 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1255 g = string_cat(g, lpart);
1258 g = string_catn(g, lpart, nq - lpart);
1259 g = string_catn(g, US"\\", 1);
1260 g = string_catn(g, nq, 1);
1264 g = string_catn(g, US"\"", 1);
1265 return string_from_gstring(g);
1271 /*************************************************
1272 * Load readline() functions *
1273 *************************************************/
1275 /* This function is called from testing executions that read data from stdin,
1276 but only when running as the calling user. Currently, only -be does this. The
1277 function loads the readline() function library and passes back the functions.
1278 On some systems, it needs the curses library, so load that too, but try without
1279 it if loading fails. All this functionality has to be requested at build time.
1282 fn_readline_ptr pointer to where to put the readline pointer
1283 fn_addhist_ptr pointer to where to put the addhistory function
1285 Returns: the dlopen handle or NULL on failure
1289 set_readline(char * (**fn_readline_ptr)(const char *),
1290 void (**fn_addhist_ptr)(const char *))
1293 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1295 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1296 if (dlhandle_curses) dlclose(dlhandle_curses);
1300 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1301 * char * readline (const char *prompt);
1302 * void add_history (const char *string);
1304 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1305 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1308 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1316 /*************************************************
1317 * Get a line from stdin for testing things *
1318 *************************************************/
1320 /* This function is called when running tests that can take a number of lines
1321 of input (for example, -be and -bt). It handles continuations and trailing
1322 spaces. And prompting and a blank line output on eof. If readline() is in use,
1323 the arguments are non-NULL and provide the relevant functions.
1326 fn_readline readline function or NULL
1327 fn_addhist addhist function or NULL
1329 Returns: pointer to dynamic memory, or NULL at end of file
1333 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1337 if (!fn_readline) { printf("> "); fflush(stdout); }
1339 for (int i = 0;; i++)
1341 uschar buffer[1024];
1345 char *readline_line = NULL;
1348 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1349 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1350 p = US readline_line;
1355 /* readline() not in use */
1358 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1362 /* Handle the line */
1364 ss = p + (int)Ustrlen(p);
1365 while (ss > p && isspace(ss[-1])) ss--;
1368 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1370 g = string_catn(g, p, ss - p);
1373 if (fn_readline) free(readline_line);
1376 /* g can only be NULL if ss==p */
1377 if (ss == p || g->s[g->ptr-1] != '\\')
1381 (void) string_from_gstring(g);
1384 if (!g) printf("\n");
1385 return string_from_gstring(g);
1390 /*************************************************
1391 * Output usage information for the program *
1392 *************************************************/
1394 /* This function is called when there are no recipients
1395 or a specific --help argument was added.
1398 progname information on what name we were called by
1400 Returns: DOES NOT RETURN
1404 exim_usage(uschar *progname)
1407 /* Handle specific program invocation variants */
1408 if (Ustrcmp(progname, US"-mailq") == 0)
1410 "mailq - list the contents of the mail queue\n\n"
1411 "For a list of options, see the Exim documentation.\n");
1413 /* Generic usage - we output this whatever happens */
1415 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1416 "not directly from a shell command line. Options and/or arguments control\n"
1417 "what it does when called. For a list of options, see the Exim documentation.\n");
1422 /*************************************************
1423 * Validate that the macros given are okay *
1424 *************************************************/
1426 /* Typically, Exim will drop privileges if macros are supplied. In some
1427 cases, we want to not do so.
1429 Arguments: opt_D_used - true if the commandline had a "-D" option
1430 Returns: true if trusted, false otherwise
1434 macros_trusted(BOOL opt_D_used)
1436 #ifdef WHITELIST_D_MACROS
1437 uschar *whitelisted, *end, *p, **whites;
1438 int white_count, i, n;
1440 BOOL prev_char_item, found;
1445 #ifndef WHITELIST_D_MACROS
1449 /* We only trust -D overrides for some invoking users:
1450 root, the exim run-time user, the optional config owner user.
1451 I don't know why config-owner would be needed, but since they can own the
1452 config files anyway, there's no security risk to letting them override -D. */
1453 if ( ! ((real_uid == root_uid)
1454 || (real_uid == exim_uid)
1455 #ifdef CONFIGURE_OWNER
1456 || (real_uid == config_uid)
1460 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1464 /* Get a list of macros which are whitelisted */
1465 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1466 prev_char_item = FALSE;
1468 for (p = whitelisted; *p != '\0'; ++p)
1470 if (*p == ':' || isspace(*p))
1475 prev_char_item = FALSE;
1478 if (!prev_char_item)
1479 prev_char_item = TRUE;
1486 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1487 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1492 if (i == white_count)
1494 while (*p != '\0' && p < end)
1500 /* The list of commandline macros should be very short.
1501 Accept the N*M complexity. */
1502 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1505 for (uschar ** w = whites; *w; ++w)
1506 if (Ustrcmp(*w, m->name) == 0)
1513 if (!m->replacement)
1515 if ((len = m->replen) == 0)
1517 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1518 0, PCRE_EOPT, NULL, 0);
1521 if (n != PCRE_ERROR_NOMATCH)
1522 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1526 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1532 /*************************************************
1533 * Expansion testing *
1534 *************************************************/
1536 /* Expand and print one item, doing macro-processing.
1539 item line for expansion
1543 expansion_test_line(uschar * line)
1548 Ustrncpy(big_buffer, line, big_buffer_size);
1549 big_buffer[big_buffer_size-1] = '\0';
1550 len = Ustrlen(big_buffer);
1552 (void) macros_expand(0, &len, &dummy_macexp);
1554 if (isupper(big_buffer[0]))
1556 if (macro_read_assignment(big_buffer))
1557 printf("Defined macro '%s'\n", mlast->name);
1560 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1561 else printf("Failed: %s\n", expand_string_message);
1566 /*************************************************
1567 * Entry point and high-level code *
1568 *************************************************/
1570 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1571 the appropriate action. All the necessary functions are present in the one
1572 binary. I originally thought one should split it up, but it turns out that so
1573 much of the apparatus is needed in each chunk that one might as well just have
1574 it all available all the time, which then makes the coding easier as well.
1577 argc count of entries in argv
1578 argv argument strings, with argv[0] being the program name
1580 Returns: EXIT_SUCCESS if terminated successfully
1581 EXIT_FAILURE otherwise, except when a message has been sent
1582 to the sender, and -oee was given
1586 main(int argc, char **cargv)
1588 uschar **argv = USS cargv;
1589 int arg_receive_timeout = -1;
1590 int arg_smtp_receive_timeout = -1;
1591 int arg_error_handling = error_handling;
1592 int filter_sfd = -1;
1593 int filter_ufd = -1;
1596 int list_queue_option = 0;
1598 int msg_action_arg = -1;
1599 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1600 int queue_only_reason = 0;
1602 int perl_start_option = 0;
1604 int recipients_arg = argc;
1605 int sender_address_domain = 0;
1606 int test_retry_arg = -1;
1607 int test_rewrite_arg = -1;
1608 gid_t original_egid;
1609 BOOL arg_queue_only = FALSE;
1610 BOOL bi_option = FALSE;
1611 BOOL checking = FALSE;
1612 BOOL count_queue = FALSE;
1613 BOOL expansion_test = FALSE;
1614 BOOL extract_recipients = FALSE;
1615 BOOL flag_G = FALSE;
1616 BOOL flag_n = FALSE;
1617 BOOL forced_delivery = FALSE;
1618 BOOL f_end_dot = FALSE;
1619 BOOL deliver_give_up = FALSE;
1620 BOOL list_queue = FALSE;
1621 BOOL list_options = FALSE;
1622 BOOL list_config = FALSE;
1623 BOOL local_queue_only;
1625 BOOL one_msg_action = FALSE;
1626 BOOL opt_D_used = FALSE;
1627 BOOL queue_only_set = FALSE;
1628 BOOL receiving_message = TRUE;
1629 BOOL sender_ident_set = FALSE;
1630 BOOL session_local_queue_only;
1632 BOOL removed_privilege = FALSE;
1633 BOOL usage_wanted = FALSE;
1634 BOOL verify_address_mode = FALSE;
1635 BOOL verify_as_sender = FALSE;
1636 BOOL rcpt_verify_quota = FALSE;
1637 BOOL version_printed = FALSE;
1638 uschar *alias_arg = NULL;
1639 uschar *called_as = US"";
1640 uschar *cmdline_syslog_name = NULL;
1641 uschar *start_queue_run_id = NULL;
1642 uschar *stop_queue_run_id = NULL;
1643 uschar *expansion_test_message = NULL;
1644 uschar *ftest_domain = NULL;
1645 uschar *ftest_localpart = NULL;
1646 uschar *ftest_prefix = NULL;
1647 uschar *ftest_suffix = NULL;
1648 uschar *log_oneline = NULL;
1649 uschar *malware_test_file = NULL;
1650 uschar *real_sender_address;
1651 uschar *originator_home = US"/";
1655 struct stat statbuf;
1656 pid_t passed_qr_pid = (pid_t)0;
1657 int passed_qr_pipe = -1;
1658 gid_t group_list[EXIM_GROUPLIST_SIZE];
1660 /* For the -bI: flag */
1661 enum commandline_info info_flag = CMDINFO_NONE;
1662 BOOL info_stdout = FALSE;
1664 /* Possible options for -R and -S */
1666 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1668 /* Need to define this in case we need to change the environment in order
1669 to get rid of a bogus time zone. We have to make it char rather than uschar
1670 because some OS define it in /usr/include/unistd.h. */
1672 extern char **environ;
1674 #ifdef MEASURE_TIMING
1675 (void)gettimeofday(×tamp_startup, NULL);
1678 store_init(); /* Initialise the memory allocation susbsystem */
1680 /* If the Exim user and/or group and/or the configuration file owner/group were
1681 defined by ref:name at build time, we must now find the actual uid/gid values.
1682 This is a feature to make the lives of binary distributors easier. */
1684 #ifdef EXIM_USERNAME
1685 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1688 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1690 /* If ref:name uses a number as the name, route_finduser() returns
1691 TRUE with exim_uid set and pw coerced to NULL. */
1693 exim_gid = pw->pw_gid;
1694 #ifndef EXIM_GROUPNAME
1697 "exim: ref:name should specify a usercode, not a group.\n"
1698 "exim: can't let you get away with it unless you also specify a group.\n");
1702 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1705 #ifdef EXIM_GROUPNAME
1706 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1707 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1710 #ifdef CONFIGURE_OWNERNAME
1711 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1712 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1713 CONFIGURE_OWNERNAME);
1716 /* We default the system_filter_user to be the Exim run-time user, as a
1717 sane non-root value. */
1718 system_filter_uid = exim_uid;
1720 #ifdef CONFIGURE_GROUPNAME
1721 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1722 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1723 CONFIGURE_GROUPNAME);
1726 /* In the Cygwin environment, some initialization used to need doing.
1727 It was fudged in by means of this macro; now no longer but we'll leave
1728 it in case of others. */
1734 /* Check a field which is patched when we are running Exim within its
1735 testing harness; do a fast initial check, and then the whole thing. */
1737 f.running_in_test_harness =
1738 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1739 if (f.running_in_test_harness)
1742 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1743 at the start of a program; however, it seems that some environments do not
1744 follow this. A "strange" locale can affect the formatting of timestamps, so we
1747 setlocale(LC_ALL, "C");
1749 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1751 #ifdef _POSIX_MONOTONIC_CLOCK
1755 /* Set up the default handler for timing using alarm(). */
1757 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1759 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1760 because store_malloc writes a log entry on failure. */
1762 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1763 exim_fail("exim: failed to get store for log buffer\n");
1765 /* Initialize the default log options. */
1767 bits_set(log_selector, log_selector_size, log_default);
1769 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1770 NULL when the daemon is run and the file is closed. We have to use this
1771 indirection, because some systems don't allow writing to the variable "stderr".
1774 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1776 /* Arrange for the PCRE regex library to use our store functions. Note that
1777 the normal calls are actually macros that add additional arguments for
1778 debugging purposes so we have to assign specially constructed functions here.
1779 The default is to use store in the stacking pool, but this is overridden in the
1780 regex_must_compile() function. */
1782 pcre_malloc = function_store_get;
1783 pcre_free = function_dummy_free;
1785 /* Ensure there is a big buffer for temporary use in several places. It is put
1786 in malloc store so that it can be freed for enlargement if necessary. */
1788 big_buffer = store_malloc(big_buffer_size);
1790 /* Set up the handler for the data request signal, and set the initial
1791 descriptive text. */
1793 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1794 set_process_info("initializing");
1795 os_restarting_signal(SIGUSR1, usr1_handler);
1797 /* If running in a dockerized environment, the TERM signal is only
1798 delegated to the PID 1 if we request it by setting an signal handler */
1799 if (getpid() == 1) signal(SIGTERM, term_handler);
1801 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1802 in the daemon code. For the rest of Exim's uses, we ignore it. */
1804 signal(SIGHUP, SIG_IGN);
1806 /* We don't want to die on pipe errors as the code is written to handle
1807 the write error instead. */
1809 signal(SIGPIPE, SIG_IGN);
1811 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1812 set to SIG_IGN. This causes subprocesses that complete before the parent
1813 process waits for them not to hang around, so when Exim calls wait(), nothing
1814 is there. The wait() code has been made robust against this, but let's ensure
1815 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1816 ending status. We use sigaction rather than plain signal() on those OS where
1817 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1818 problem on AIX with this.) */
1822 struct sigaction act;
1823 act.sa_handler = SIG_DFL;
1824 sigemptyset(&(act.sa_mask));
1826 sigaction(SIGCHLD, &act, NULL);
1829 signal(SIGCHLD, SIG_DFL);
1832 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1837 /* Set up the version number. Set up the leading 'E' for the external form of
1838 message ids, set the pointer to the internal form, and initialize it to
1839 indicate no message being processed. */
1842 message_id_option[0] = '-';
1843 message_id_external = message_id_option + 1;
1844 message_id_external[0] = 'E';
1845 message_id = message_id_external + 1;
1848 /* Set the umask to zero so that any files Exim creates using open() are
1849 created with the modes that it specifies. NOTE: Files created with fopen() have
1850 a problem, which was not recognized till rather late (February 2006). With this
1851 umask, such files will be world writeable. (They are all content scanning files
1852 in the spool directory, which isn't world-accessible, so this is not a
1853 disaster, but it's untidy.) I don't want to change this overall setting,
1854 however, because it will interact badly with the open() calls. Instead, there's
1855 now a function called modefopen() that fiddles with the umask while calling
1860 /* Precompile the regular expression for matching a message id. Keep this in
1861 step with the code that generates ids in the accept.c module. We need to do
1862 this here, because the -M options check their arguments for syntactic validity
1863 using mac_ismsgid, which uses this. */
1866 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1868 /* Precompile the regular expression that is used for matching an SMTP error
1869 code, possibly extended, at the start of an error message. Note that the
1870 terminating whitespace character is included. */
1873 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1876 #ifdef WHITELIST_D_MACROS
1877 /* Precompile the regular expression used to filter the content of macros
1878 given to -D for permissibility. */
1880 regex_whitelisted_macro =
1881 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1884 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1886 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1887 this seems to be a generally accepted convention, since one finds symbolic
1888 links called "mailq" in standard OS configurations. */
1890 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1891 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1894 receiving_message = FALSE;
1895 called_as = US"-mailq";
1898 /* If the program is called as "rmail" treat it as equivalent to
1899 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1900 i.e. preventing a single dot on a line from terminating the message, and
1901 returning with zero return code, even in cases of error (provided an error
1902 message has been sent). */
1904 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1905 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1908 called_as = US"-rmail";
1909 errors_sender_rc = EXIT_SUCCESS;
1912 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1913 this is a smail convention. */
1915 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1916 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1918 smtp_input = smtp_batched_input = TRUE;
1919 called_as = US"-rsmtp";
1922 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1923 this is a smail convention. */
1925 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1926 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1929 receiving_message = FALSE;
1930 called_as = US"-runq";
1933 /* If the program is called as "newaliases" treat it as equivalent to
1934 "exim -bi"; this is a sendmail convention. */
1936 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1937 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1940 receiving_message = FALSE;
1941 called_as = US"-newaliases";
1944 /* Save the original effective uid for a couple of uses later. It should
1945 normally be root, but in some esoteric environments it may not be. */
1947 original_euid = geteuid();
1948 original_egid = getegid();
1950 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1951 to be the same as the real ones. This makes a difference only if Exim is setuid
1952 (or setgid) to something other than root, which could be the case in some
1953 special configurations. */
1955 real_uid = getuid();
1956 real_gid = getgid();
1958 if (real_uid == root_uid)
1960 if ((rv = setgid(real_gid)))
1961 exim_fail("exim: setgid(%ld) failed: %s\n",
1962 (long int)real_gid, strerror(errno));
1963 if ((rv = setuid(real_uid)))
1964 exim_fail("exim: setuid(%ld) failed: %s\n",
1965 (long int)real_uid, strerror(errno));
1968 /* If neither the original real uid nor the original euid was root, Exim is
1969 running in an unprivileged state. */
1971 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1973 /* For most of the args-parsing we need to use permanent pool memory */
1975 int old_pool = store_pool;
1976 store_pool = POOL_PERM;
1978 /* Scan the program's arguments. Some can be dealt with right away; others are
1979 simply recorded for checking and handling afterwards. Do a high-level switch
1980 on the second character (the one after '-'), to save some effort. */
1982 for (i = 1; i < argc; i++)
1984 BOOL badarg = FALSE;
1985 uschar * arg = argv[i];
1989 /* An argument not starting with '-' is the start of a recipients list;
1990 break out of the options-scanning loop. */
1998 /* An option consisting of -- terminates the options */
2000 if (Ustrcmp(arg, "--") == 0)
2002 recipients_arg = i + 1;
2006 /* Handle flagged options */
2008 switchchar = arg[1];
2011 /* Make all -ex options synonymous with -oex arguments, since that
2012 is assumed by various callers. Also make -qR options synonymous with -R
2013 options, as that seems to be required as well. Allow for -qqR too, and
2014 the same for -S options. */
2016 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2017 Ustrncmp(arg+1, "qR", 2) == 0 ||
2018 Ustrncmp(arg+1, "qS", 2) == 0)
2020 switchchar = arg[2];
2023 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2025 switchchar = arg[3];
2027 f.queue_2stage = TRUE;
2030 /* Make -r synonymous with -f, since it is a documented alias */
2032 else if (arg[1] == 'r') switchchar = 'f';
2034 /* Make -ov synonymous with -v */
2036 else if (Ustrcmp(arg, "-ov") == 0)
2042 /* deal with --option_aliases */
2043 else if (switchchar == '-')
2045 if (Ustrcmp(argrest, "help") == 0)
2047 usage_wanted = TRUE;
2050 else if (Ustrcmp(argrest, "version") == 0)
2057 /* High-level switch on active initial letter */
2062 /* sendmail uses -Ac and -Am to control which .cf file is used;
2065 if (!*argrest) { badarg = TRUE; break; }
2068 BOOL ignore = FALSE;
2073 if (*(argrest + 1) == '\0')
2077 if (!ignore) badarg = TRUE;
2081 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2082 so has no need of it. */
2085 if (!*argrest) i++; /* Skip over the type */
2091 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2095 /* -bd: Run in daemon mode, awaiting SMTP connections.
2096 -bdf: Ditto, but in the foreground.
2099 f.daemon_listen = TRUE;
2100 if (*argrest == 'f') f.background_daemon = FALSE;
2101 else if (*argrest) badarg = TRUE;
2104 /* -be: Run in expansion test mode
2105 -bem: Ditto, but read a message from a file first
2108 expansion_test = checking = TRUE;
2109 if (*argrest == 'm')
2111 if (++i >= argc) { badarg = TRUE; break; }
2112 expansion_test_message = argv[i];
2115 if (*argrest) badarg = TRUE;
2118 /* -bF: Run system filter test */
2120 filter_test |= checking = FTEST_SYSTEM;
2121 if (*argrest) badarg = TRUE;
2122 else if (++i < argc) filter_test_sfile = argv[i];
2123 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2126 /* -bf: Run user filter test
2127 -bfd: Set domain for filter testing
2128 -bfl: Set local part for filter testing
2129 -bfp: Set prefix for filter testing
2130 -bfs: Set suffix for filter testing
2135 filter_test |= checking = FTEST_USER;
2136 if (++i < argc) filter_test_ufile = argv[i];
2137 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2142 exim_fail("exim: string expected after %s\n", arg);
2143 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2144 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2145 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2146 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2151 /* -bh: Host checking - an IP address must follow. */
2153 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2155 if (++i >= argc) { badarg = TRUE; break; }
2156 sender_host_address = string_copy_taint(argv[i], TRUE);
2157 host_checking = checking = f.log_testing_mode = TRUE;
2158 f.host_checking_callout = *argrest == 'c';
2159 message_logs = FALSE;
2164 /* -bi: This option is used by sendmail to initialize *the* alias file,
2165 though it has the -oA option to specify a different file. Exim has no
2166 concept of *the* alias file, but since Sun's YP make script calls
2167 sendmail this way, some support must be provided. */
2169 if (!*argrest) bi_option = TRUE;
2173 /* -bI: provide information, of the type to follow after a colon.
2174 This is an Exim flag. */
2176 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2178 uschar *p = argrest+1;
2179 info_flag = CMDINFO_HELP;
2181 if (strcmpic(p, CUS"sieve") == 0)
2183 info_flag = CMDINFO_SIEVE;
2186 else if (strcmpic(p, CUS"dscp") == 0)
2188 info_flag = CMDINFO_DSCP;
2191 else if (strcmpic(p, CUS"help") == 0)
2197 /* -bm: Accept and deliver message - the default option. Reinstate
2198 receiving_message, which got turned off for all -b options.
2199 -bmalware: test the filename given for malware */
2201 if (!*argrest) receiving_message = TRUE;
2202 else if (Ustrcmp(argrest, "alware") == 0)
2204 if (++i >= argc) { badarg = TRUE; break; }
2206 malware_test_file = argv[i];
2211 /* -bnq: For locally originating messages, do not qualify unqualified
2212 addresses. In the envelope, this causes errors; in header lines they
2215 if (Ustrcmp(argrest, "q") == 0)
2217 f.allow_unqualified_sender = FALSE;
2218 f.allow_unqualified_recipient = FALSE;
2223 /* -bpxx: List the contents of the mail queue, in various forms. If
2224 the option is -bpc, just a queue count is needed. Otherwise, if the
2225 first letter after p is r, then order is random. */
2227 if (*argrest == 'c')
2230 if (*++argrest) badarg = TRUE;
2234 if (*argrest == 'r')
2236 list_queue_option = 8;
2239 else list_queue_option = 0;
2243 /* -bp: List the contents of the mail queue, top-level only */
2247 /* -bpu: List the contents of the mail queue, top-level undelivered */
2249 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2251 /* -bpa: List the contents of the mail queue, including all delivered */
2253 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2255 /* Unknown after -bp[r] */
2261 /* -bP: List the configuration variables given as the address list.
2262 Force -v, so configuration errors get displayed. */
2265 /* -bP config: we need to setup here, because later,
2266 when list_options is checked, the config is read already */
2269 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2272 readconf_save_config(version_string);
2276 list_options = TRUE;
2277 debug_selector |= D_v;
2278 debug_file = stderr;
2282 /* -brt: Test retry configuration lookup */
2284 if (Ustrcmp(argrest, "t") == 0)
2287 test_retry_arg = i + 1;
2291 /* -brw: Test rewrite configuration */
2293 else if (Ustrcmp(argrest, "w") == 0)
2296 test_rewrite_arg = i + 1;
2302 /* -bS: Read SMTP commands on standard input, but produce no replies -
2303 all errors are reported by sending messages. */
2306 smtp_input = smtp_batched_input = receiving_message = TRUE;
2310 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2311 on standard output. */
2313 if (!*argrest) smtp_input = receiving_message = TRUE;
2317 /* -bt: address testing mode */
2320 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2324 /* -bv: verify addresses */
2327 verify_address_mode = checking = f.log_testing_mode = TRUE;
2329 /* -bvs: verify sender addresses */
2331 else if (Ustrcmp(argrest, "s") == 0)
2333 verify_address_mode = checking = f.log_testing_mode = TRUE;
2334 verify_as_sender = TRUE;
2339 /* -bV: Print version string and support details */
2343 printf("Exim version %s #%s built %s\n", version_string,
2344 version_cnumber, version_date);
2345 printf("%s\n", CS version_copyright);
2346 version_printed = TRUE;
2347 show_whats_supported(stdout);
2348 f.log_testing_mode = TRUE;
2353 /* -bw: inetd wait mode, accept a listening socket as stdin */
2355 f.inetd_wait_mode = TRUE;
2356 f.background_daemon = FALSE;
2357 f.daemon_listen = TRUE;
2359 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2360 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2371 /* -C: change configuration file list; ignore if it isn't really
2372 a change! Enforce a prefix check if required. */
2376 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2377 if (Ustrcmp(config_main_filelist, argrest) != 0)
2379 #ifdef ALT_CONFIG_PREFIX
2381 int len = Ustrlen(ALT_CONFIG_PREFIX);
2382 const uschar *list = argrest;
2384 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2385 while((filename = string_nextinlist(&list, &sep, big_buffer,
2387 if ( ( Ustrlen(filename) < len
2388 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2389 || Ustrstr(filename, "/../") != NULL
2391 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2393 exim_fail("-C Permission denied\n");
2395 if (real_uid != root_uid)
2397 #ifdef TRUSTED_CONFIG_LIST
2399 if (real_uid != exim_uid
2400 #ifdef CONFIGURE_OWNER
2401 && real_uid != config_uid
2404 f.trusted_config = FALSE;
2407 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2410 struct stat statbuf;
2412 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2413 (statbuf.st_uid != root_uid /* owner not root */
2414 #ifdef CONFIGURE_OWNER
2415 && statbuf.st_uid != config_uid /* owner not the special one */
2418 (statbuf.st_gid != root_gid /* group not root */
2419 #ifdef CONFIGURE_GROUP
2420 && statbuf.st_gid != config_gid /* group not the special one */
2422 && (statbuf.st_mode & 020) != 0 /* group writeable */
2424 (statbuf.st_mode & 2) != 0) /* world writeable */
2426 f.trusted_config = FALSE;
2431 /* Well, the trust list at least is up to scratch... */
2433 uschar *trusted_configs[32];
2436 int old_pool = store_pool;
2437 store_pool = POOL_MAIN;
2439 reset_point = store_mark();
2440 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2442 uschar *start = big_buffer, *nl;
2443 while (*start && isspace(*start))
2447 nl = Ustrchr(start, '\n');
2450 trusted_configs[nr_configs++] = string_copy(start);
2451 if (nr_configs == nelem(trusted_configs))
2459 const uschar *list = argrest;
2461 while (f.trusted_config && (filename = string_nextinlist(&list,
2462 &sep, big_buffer, big_buffer_size)))
2464 for (i=0; i < nr_configs; i++)
2465 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2467 if (i == nr_configs)
2469 f.trusted_config = FALSE;
2474 else /* No valid prefixes found in trust_list file. */
2475 f.trusted_config = FALSE;
2476 store_reset(reset_point);
2477 store_pool = old_pool;
2480 else /* Could not open trust_list file. */
2481 f.trusted_config = FALSE;
2484 /* Not root; don't trust config */
2485 f.trusted_config = FALSE;
2489 config_main_filelist = argrest;
2490 f.config_changed = TRUE;
2495 /* -D: set up a macro definition */
2498 #ifdef DISABLE_D_OPTION
2499 exim_fail("exim: -D is not available in this Exim binary\n");
2505 uschar *s = argrest;
2508 while (isspace(*s)) s++;
2510 if (*s < 'A' || *s > 'Z')
2511 exim_fail("exim: macro name set by -D must start with "
2512 "an upper case letter\n");
2514 while (isalnum(*s) || *s == '_')
2516 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2520 if (ptr == 0) { badarg = TRUE; break; }
2521 while (isspace(*s)) s++;
2524 if (*s++ != '=') { badarg = TRUE; break; }
2525 while (isspace(*s)) s++;
2528 for (m = macros_user; m; m = m->next)
2529 if (Ustrcmp(m->name, name) == 0)
2530 exim_fail("exim: duplicated -D in command line\n");
2532 m = macro_create(name, s, TRUE);
2534 if (clmacro_count >= MAX_CLMACROS)
2535 exim_fail("exim: too many -D options on command line\n");
2536 clmacros[clmacro_count++] =
2537 string_sprintf("-D%s=%s", m->name, m->replacement);
2542 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2543 The latter is now a no-op, retained for compatibility only. If -dd is used,
2544 debugging subprocesses of the daemon is disabled. */
2547 if (Ustrcmp(argrest, "ropcr") == 0)
2549 /* drop_cr = TRUE; */
2552 /* Use an intermediate variable so that we don't set debugging while
2553 decoding the debugging bits. */
2557 unsigned int selector = D_default;
2560 if (*argrest == 'd')
2562 f.debug_daemon = TRUE;
2566 decode_bits(&selector, 1, debug_notall, argrest,
2567 debug_options, debug_options_count, US"debug", 0);
2568 debug_selector = selector;
2573 /* -E: This is a local error message. This option is not intended for
2574 external use at all, but is not restricted to trusted callers because it
2575 does no harm (just suppresses certain error messages) and if Exim is run
2576 not setuid root it won't always be trusted when it generates error
2577 messages using this option. If there is a message id following -E, point
2578 message_reference at it, for logging. */
2581 f.local_error_message = TRUE;
2582 if (mac_ismsgid(argrest)) message_reference = argrest;
2586 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2587 option, so it looks as if historically the -oex options are also callable
2588 without the leading -o. So we have to accept them. Before the switch,
2589 anything starting -oe has been converted to -e. Exim does not support all
2590 of the sendmail error options. */
2593 if (Ustrcmp(argrest, "e") == 0)
2595 arg_error_handling = ERRORS_SENDER;
2596 errors_sender_rc = EXIT_SUCCESS;
2598 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2599 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2600 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2601 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2606 /* -F: Set sender's full name, used instead of the gecos entry from
2607 the password file. Since users can usually alter their gecos entries,
2608 there's no security involved in using this instead. The data can follow
2609 the -F or be in the next argument. */
2613 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2614 originator_name = string_copy_taint(argrest, TRUE);
2615 f.sender_name_forced = TRUE;
2619 /* -f: Set sender's address - this value is only actually used if Exim is
2620 run by a trusted user, or if untrusted_set_sender is set and matches the
2621 address, except that the null address can always be set by any user. The
2622 test for this happens later, when the value given here is ignored when not
2623 permitted. For an untrusted user, the actual sender is still put in Sender:
2624 if it doesn't match the From: header (unless no_local_from_check is set).
2625 The data can follow the -f or be in the next argument. The -r switch is an
2626 obsolete form of -f but since there appear to be programs out there that
2627 use anything that sendmail has ever supported, better accept it - the
2628 synonymizing is done before the switch above.
2630 At this stage, we must allow domain literal addresses, because we don't
2631 know what the setting of allow_domain_literals is yet. Ditto for trailing
2632 dots and strip_trailing_dot. */
2636 int dummy_start, dummy_end;
2639 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2641 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2644 uschar * temp = argrest + Ustrlen(argrest) - 1;
2645 while (temp >= argrest && isspace(*temp)) temp--;
2646 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2647 allow_domain_literals = TRUE;
2648 strip_trailing_dot = TRUE;
2650 allow_utf8_domains = TRUE;
2652 if (!(sender_address = parse_extract_address(argrest, &errmess,
2653 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2654 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2656 sender_address = string_copy_taint(sender_address, TRUE);
2658 message_smtputf8 = string_is_utf8(sender_address);
2659 allow_utf8_domains = FALSE;
2661 allow_domain_literals = FALSE;
2662 strip_trailing_dot = FALSE;
2664 f.sender_address_forced = TRUE;
2668 /* -G: sendmail invocation to specify that it's a gateway submission and
2669 sendmail may complain about problems instead of fixing them.
2670 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2671 not at this time complain about problems. */
2677 /* -h: Set the hop count for an incoming message. Exim does not currently
2678 support this; it always computes it by counting the Received: headers.
2679 To put it in will require a change to the spool header file format. */
2683 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2684 if (!isdigit(*argrest)) badarg = TRUE;
2688 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2689 not to be documented for sendmail but mailx (at least) uses it) */
2692 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2696 /* -L: set the identifier used for syslog; equivalent to setting
2697 syslog_processname in the config file, but needs to be an admin option. */
2701 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2702 if ((sz = Ustrlen(argrest)) > 32)
2703 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2705 exim_fail("exim: the -L syslog name is too short\n");
2706 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2710 receiving_message = FALSE;
2712 /* -MC: continue delivery of another message via an existing open
2713 file descriptor. This option is used for an internal call by the
2714 smtp transport when there is a pending message waiting to go to an
2715 address to which it has got a connection. Five subsequent arguments are
2716 required: transport name, host name, IP address, sequence number, and
2717 message_id. Transports may decline to create new processes if the sequence
2718 number gets too big. The channel is stdin. This (-MC) must be the last
2719 argument. There's a subsequent check that the real-uid is privileged.
2721 If we are running in the test harness. delay for a bit, to let the process
2722 that set this one up complete. This makes for repeatability of the logging,
2725 if (Ustrcmp(argrest, "C") == 0)
2727 union sockaddr_46 interface_sock;
2728 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2731 exim_fail("exim: too many or too few arguments after -MC\n");
2733 if (msg_action_arg >= 0)
2734 exim_fail("exim: incompatible arguments\n");
2736 continue_transport = string_copy_taint(argv[++i], TRUE);
2737 continue_hostname = string_copy_taint(argv[++i], TRUE);
2738 continue_host_address = string_copy_taint(argv[++i], TRUE);
2739 continue_sequence = Uatoi(argv[++i]);
2740 msg_action = MSG_DELIVER;
2741 msg_action_arg = ++i;
2742 forced_delivery = TRUE;
2743 queue_run_pid = passed_qr_pid;
2744 queue_run_pipe = passed_qr_pipe;
2746 if (!mac_ismsgid(argv[i]))
2747 exim_fail("exim: malformed message id %s after -MC option\n",
2750 /* Set up $sending_ip_address and $sending_port, unless proxied */
2752 if (!continue_proxy_cipher)
2753 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2755 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2758 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2761 testharness_pause_ms(500);
2765 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2769 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2770 precedes -MC (see above). The flag indicates that the host to which
2771 Exim is connected has accepted an AUTH sequence. */
2773 case 'A': f.smtp_authenticated = TRUE; break;
2775 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2776 that exim is connected to supports the esmtp extension DSN */
2778 case 'D': smtp_peer_options |= OPTION_DSN; break;
2780 /* -MCd: for debug, set a process-purpose string */
2782 case 'd': if (++i < argc)
2783 process_purpose = string_copy_taint(argv[i], TRUE);
2787 /* -MCG: set the queue name, to a non-default value */
2789 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2793 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2795 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2797 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2798 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2799 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2801 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2803 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2808 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2809 it preceded -MC (see above) */
2811 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2813 #ifdef SUPPORT_SOCKS
2814 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2815 case 'p': proxy_session = TRUE;
2818 proxy_local_address = string_copy_taint(argv[i], TRUE);
2821 proxy_local_port = Uatoi(argv[i]);
2824 proxy_external_address = string_copy_taint(argv[i], TRUE);
2827 proxy_external_port = Uatoi(argv[i]);
2833 /* -MCQ: pass on the pid of the queue-running process that started
2834 this chain of deliveries and the fd of its synchronizing pipe; this
2835 is useful only when it precedes -MC (see above) */
2837 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2839 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2843 /* -MCq: do a quota check on the given recipient for the given size
2844 of message. Separate from -MC. */
2845 case 'q': rcpt_verify_quota = TRUE;
2846 if (++i < argc) message_size = Uatoi(argv[i]);
2850 /* -MCS: set the smtp_use_size flag; this is useful only when it
2851 precedes -MC (see above) */
2853 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2856 /* -MCs: used with -MCt; SNI was sent */
2857 /* -MCr: ditto, DANE */
2860 case 's': if (++i < argc)
2862 continue_proxy_sni = string_copy_taint(argv[i], TRUE);
2863 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2868 /* -MCt: similar to -MCT below but the connection is still open
2869 via a proxy process which handles the TLS context and coding.
2870 Require three arguments for the proxied local address and port,
2871 and the TLS cipher. */
2873 case 't': if (++i < argc)
2874 sending_ip_address = string_copy_taint(argv[i], TRUE);
2877 sending_port = (int)(Uatol(argv[i]));
2880 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2884 /* -MCT: set the tls_offered flag; this is useful only when it
2885 precedes -MC (see above). The flag indicates that the host to which
2886 Exim is connected has offered TLS support. */
2888 case 'T': smtp_peer_options |= OPTION_TLS; break;
2891 default: badarg = TRUE; break;
2896 /* -M[x]: various operations on the following list of message ids:
2897 -M deliver the messages, ignoring next retry times and thawing
2898 -Mc deliver the messages, checking next retry times, no thawing
2899 -Mf freeze the messages
2900 -Mg give up on the messages
2901 -Mt thaw the messages
2902 -Mrm remove the messages
2903 In the above cases, this must be the last option. There are also the
2904 following options which are followed by a single message id, and which
2905 act on that message. Some of them use the "recipient" addresses as well.
2906 -Mar add recipient(s)
2907 -Mmad mark all recipients delivered
2908 -Mmd mark recipients(s) delivered
2910 -Mset load a message for use with -be
2912 -Mvc show copy (of whole message, in RFC 2822 format)
2919 msg_action = MSG_DELIVER;
2920 forced_delivery = f.deliver_force_thaw = TRUE;
2922 else if (Ustrcmp(argrest, "ar") == 0)
2924 msg_action = MSG_ADD_RECIPIENT;
2925 one_msg_action = TRUE;
2927 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2928 else if (Ustrcmp(argrest, "es") == 0)
2930 msg_action = MSG_EDIT_SENDER;
2931 one_msg_action = TRUE;
2933 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2934 else if (Ustrcmp(argrest, "g") == 0)
2936 msg_action = MSG_DELIVER;
2937 deliver_give_up = TRUE;
2939 else if (Ustrcmp(argrest, "G") == 0)
2941 msg_action = MSG_SETQUEUE;
2942 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2944 else if (Ustrcmp(argrest, "mad") == 0)
2946 msg_action = MSG_MARK_ALL_DELIVERED;
2948 else if (Ustrcmp(argrest, "md") == 0)
2950 msg_action = MSG_MARK_DELIVERED;
2951 one_msg_action = TRUE;
2953 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2954 else if (Ustrcmp(argrest, "set") == 0)
2956 msg_action = MSG_LOAD;
2957 one_msg_action = TRUE;
2959 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2960 else if (Ustrcmp(argrest, "vb") == 0)
2962 msg_action = MSG_SHOW_BODY;
2963 one_msg_action = TRUE;
2965 else if (Ustrcmp(argrest, "vc") == 0)
2967 msg_action = MSG_SHOW_COPY;
2968 one_msg_action = TRUE;
2970 else if (Ustrcmp(argrest, "vh") == 0)
2972 msg_action = MSG_SHOW_HEADER;
2973 one_msg_action = TRUE;
2975 else if (Ustrcmp(argrest, "vl") == 0)
2977 msg_action = MSG_SHOW_LOG;
2978 one_msg_action = TRUE;
2980 else { badarg = TRUE; break; }
2982 /* All the -Mxx options require at least one message id. */
2984 msg_action_arg = i + 1;
2985 if (msg_action_arg >= argc)
2986 exim_fail("exim: no message ids given after %s option\n", arg);
2988 /* Some require only message ids to follow */
2990 if (!one_msg_action)
2992 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2993 exim_fail("exim: malformed message id %s after %s option\n",
2995 goto END_ARG; /* Remaining args are ids */
2998 /* Others require only one message id, possibly followed by addresses,
2999 which will be handled as normal arguments. */
3003 if (!mac_ismsgid(argv[msg_action_arg]))
3004 exim_fail("exim: malformed message id %s after %s option\n",
3005 argv[msg_action_arg], arg);
3011 /* Some programs seem to call the -om option without the leading o;
3012 for sendmail it askes for "me too". Exim always does this. */
3015 if (*argrest) badarg = TRUE;
3019 /* -N: don't do delivery - a debugging option that stops transports doing
3020 their thing. It implies debugging at the D_v level. */
3025 f.dont_deliver = TRUE;
3026 debug_selector |= D_v;
3027 debug_file = stderr;
3033 /* -n: This means "don't alias" in sendmail, apparently.
3034 For normal invocations, it has no effect.
3035 It may affect some other options. */
3041 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3042 option to the specified value. This form uses long names. We need to handle
3043 -O option=value and -Ooption=value. */
3048 exim_fail("exim: string expected after -O\n");
3054 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3057 if (!*(alias_arg = argrest))
3058 if (i+1 < argc) alias_arg = argv[++i];
3059 else exim_fail("exim: string expected after -oA\n");
3062 /* -oB: Set a connection message max value for remote deliveries */
3065 uschar * p = argrest;
3067 if (i+1 < argc && isdigit((argv[i+1][0])))
3071 connection_max_messages = 1;
3078 exim_fail("exim: number expected after -oB\n");
3079 connection_max_messages = Uatoi(p);
3084 /* -odb: background delivery */
3087 if (Ustrcmp(argrest, "b") == 0)
3089 f.synchronous_delivery = FALSE;
3090 arg_queue_only = FALSE;
3091 queue_only_set = TRUE;
3094 /* -odd: testsuite-only: add no inter-process delays */
3096 else if (Ustrcmp(argrest, "d") == 0)
3097 f.testsuite_delays = FALSE;
3099 /* -odf: foreground delivery (smail-compatible option); same effect as
3100 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3103 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3105 f.synchronous_delivery = TRUE;
3106 arg_queue_only = FALSE;
3107 queue_only_set = TRUE;
3110 /* -odq: queue only */
3112 else if (Ustrcmp(argrest, "q") == 0)
3114 f.synchronous_delivery = FALSE;
3115 arg_queue_only = TRUE;
3116 queue_only_set = TRUE;
3119 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3120 but no remote delivery */
3122 else if (Ustrcmp(argrest, "qs") == 0)
3124 f.queue_smtp = TRUE;
3125 arg_queue_only = FALSE;
3126 queue_only_set = TRUE;
3131 /* -oex: Sendmail error flags. As these are also accepted without the
3132 leading -o prefix, for compatibility with vacation and other callers,
3133 they are handled with -e above. */
3135 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3136 -oitrue: Another sendmail syntax for the same */
3139 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3144 /* -oM*: Set various characteristics for an incoming message; actually
3145 acted on for trusted callers only. */
3150 exim_fail("exim: data expected after -oM%s\n", argrest);
3152 /* -oMa: Set sender host address */
3154 if (Ustrcmp(argrest, "a") == 0)
3155 sender_host_address = string_copy_taint(argv[++i], TRUE);
3157 /* -oMaa: Set authenticator name */
3159 else if (Ustrcmp(argrest, "aa") == 0)
3160 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3162 /* -oMas: setting authenticated sender */
3164 else if (Ustrcmp(argrest, "as") == 0)
3165 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3167 /* -oMai: setting authenticated id */
3169 else if (Ustrcmp(argrest, "ai") == 0)
3170 authenticated_id = string_copy_taint(argv[++i], TRUE);
3172 /* -oMi: Set incoming interface address */
3174 else if (Ustrcmp(argrest, "i") == 0)
3175 interface_address = string_copy_taint(argv[++i], TRUE);
3177 /* -oMm: Message reference */
3179 else if (Ustrcmp(argrest, "m") == 0)
3181 if (!mac_ismsgid(argv[i+1]))
3182 exim_fail("-oMm must be a valid message ID\n");
3183 if (!f.trusted_config)
3184 exim_fail("-oMm must be called by a trusted user/config\n");
3185 message_reference = argv[++i];
3188 /* -oMr: Received protocol */
3190 else if (Ustrcmp(argrest, "r") == 0)
3192 if (received_protocol)
3193 exim_fail("received_protocol is set already\n");
3195 received_protocol = string_copy_taint(argv[++i], TRUE);
3197 /* -oMs: Set sender host name */
3199 else if (Ustrcmp(argrest, "s") == 0)
3200 sender_host_name = string_copy_taint(argv[++i], TRUE);
3202 /* -oMt: Set sender ident */
3204 else if (Ustrcmp(argrest, "t") == 0)
3206 sender_ident_set = TRUE;
3207 sender_ident = string_copy_taint(argv[++i], TRUE);
3210 /* Else a bad argument */
3217 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3218 seem to call this as -m (undocumented), so that is also accepted (see
3220 /* -oo: An ancient flag for old-style addresses which still seems to
3221 crop up in some calls (see in SCO). */
3225 if (*argrest) badarg = TRUE;
3228 /* -oP <name>: set pid file path for daemon
3229 -oPX: delete pid file of daemon */
3232 if (!*argrest) override_pid_file_path = argv[++i];
3233 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3238 /* -or <n>: set timeout for non-SMTP acceptance
3239 -os <n>: set timeout for SMTP acceptance */
3244 int * tp = argrest[-1] == 'r'
3245 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3247 *tp = readconf_readtime(argrest, 0, FALSE);
3248 else if (i+1 < argc)
3249 *tp = readconf_readtime(argv[++i], 0, FALSE);
3252 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3256 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3259 if (*argrest) badarg = TRUE;
3260 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3263 /* -oY: Override creation of daemon notifier socket */
3266 if (*argrest) badarg = TRUE;
3267 else notifier_socket = NULL;
3270 /* Unknown -o argument */
3278 /* -ps: force Perl startup; -pd force delayed Perl startup */
3282 if (*argrest == 's' && argrest[1] == 0)
3284 perl_start_option = 1;
3287 if (*argrest == 'd' && argrest[1] == 0)
3289 perl_start_option = -1;
3294 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3295 which sets the host protocol and host name */
3298 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3302 uschar * hn = Ustrchr(argrest, ':');
3304 if (received_protocol)
3305 exim_fail("received_protocol is set already\n");
3308 received_protocol = string_copy_taint(argrest, TRUE);
3311 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3312 sender_host_name = string_copy_taint(hn + 1, TRUE);
3319 receiving_message = FALSE;
3320 if (queue_interval >= 0)
3321 exim_fail("exim: -q specified more than once\n");
3323 /* -qq...: Do queue runs in a 2-stage manner */
3325 if (*argrest == 'q')
3327 f.queue_2stage = TRUE;
3331 /* -qi...: Do only first (initial) deliveries */
3333 if (*argrest == 'i')
3335 f.queue_run_first_delivery = TRUE;
3339 /* -qf...: Run the queue, forcing deliveries
3340 -qff..: Ditto, forcing thawing as well */
3342 if (*argrest == 'f')
3344 f.queue_run_force = TRUE;
3345 if (*++argrest == 'f')
3347 f.deliver_force_thaw = TRUE;
3352 /* -q[f][f]l...: Run the queue only on local deliveries */
3354 if (*argrest == 'l')
3356 f.queue_run_local = TRUE;
3360 /* -q[f][f][l][G<name>]... Work on the named queue */
3362 if (*argrest == 'G')
3365 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3366 queue_name = string_copyn(argrest, i);
3368 if (*argrest == '/') argrest++;
3371 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3372 only, optionally named, optionally starting from a given message id. */
3374 if (!(list_queue || count_queue))
3376 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3379 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3380 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3381 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3382 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3385 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3386 forced, optionally local only, optionally named. */
3388 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3390 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3394 case 'R': /* Synonymous with -qR... */
3395 receiving_message = FALSE;
3397 /* -Rf: As -R (below) but force all deliveries,
3398 -Rff: Ditto, but also thaw all frozen messages,
3399 -Rr: String is regex
3400 -Rrf: Regex and force
3401 -Rrff: Regex and force and thaw
3403 in all cases provided there are no further characters in this
3407 for (int i = 0; i < nelem(rsopts); i++)
3408 if (Ustrcmp(argrest, rsopts[i]) == 0)
3410 if (i != 2) f.queue_run_force = TRUE;
3411 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3412 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3413 argrest += Ustrlen(rsopts[i]);
3416 /* -R: Set string to match in addresses for forced queue run to
3417 pick out particular messages. */
3420 deliver_selectstring = string_copy_taint(argrest, TRUE);
3421 else if (i+1 < argc)
3422 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3424 exim_fail("exim: string expected after -R\n");
3428 /* -r: an obsolete synonym for -f (see above) */
3431 /* -S: Like -R but works on sender. */
3433 case 'S': /* Synonymous with -qS... */
3434 receiving_message = FALSE;
3436 /* -Sf: As -S (below) but force all deliveries,
3437 -Sff: Ditto, but also thaw all frozen messages,
3438 -Sr: String is regex
3439 -Srf: Regex and force
3440 -Srff: Regex and force and thaw
3442 in all cases provided there are no further characters in this
3446 for (int i = 0; i < nelem(rsopts); i++)
3447 if (Ustrcmp(argrest, rsopts[i]) == 0)
3449 if (i != 2) f.queue_run_force = TRUE;
3450 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3451 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3452 argrest += Ustrlen(rsopts[i]);
3455 /* -S: Set string to match in addresses for forced queue run to
3456 pick out particular messages. */
3459 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3460 else if (i+1 < argc)
3461 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3463 exim_fail("exim: string expected after -S\n");
3466 /* -Tqt is an option that is exclusively for use by the testing suite.
3467 It is not recognized in other circumstances. It allows for the setting up
3468 of explicit "queue times" so that various warning/retry things can be
3469 tested. Otherwise variability of clock ticks etc. cause problems. */
3472 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3473 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3478 /* -t: Set flag to extract recipients from body of message. */
3481 if (!*argrest) extract_recipients = TRUE;
3483 /* -ti: Set flag to extract recipients from body of message, and also
3484 specify that dot does not end the message. */
3486 else if (Ustrcmp(argrest, "i") == 0)
3488 extract_recipients = TRUE;
3492 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3495 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3502 /* -U: This means "initial user submission" in sendmail, apparently. The
3503 doc claims that in future sendmail may refuse syntactically invalid
3504 messages instead of fixing them. For the moment, we just ignore it. */
3510 /* -v: verify things - this is a very low-level debugging */
3515 debug_selector |= D_v;
3516 debug_file = stderr;
3522 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3524 The -x flag tells the sendmail command that mail from a local
3525 mail program has National Language Support (NLS) extended characters
3526 in the body of the mail item. The sendmail command can send mail with
3527 extended NLS characters across networks that normally corrupts these
3530 As Exim is 8-bit clean, it just ignores this flag. */
3533 if (*argrest) badarg = TRUE;
3536 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3537 logs to that file. We swallow the parameter and otherwise ignore it. */
3542 exim_fail("exim: string expected after -X\n");
3548 log_oneline = string_copy_taint(argv[i], TRUE);
3550 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3553 /* All other initial characters are errors */
3558 } /* End of high-level switch statement */
3560 /* Failed to recognize the option, or syntax error */
3563 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3564 "option %s\n", arg);
3568 /* If -R or -S have been specified without -q, assume a single queue run. */
3570 if ( (deliver_selectstring || deliver_selectstring_sender)
3571 && queue_interval < 0)
3576 store_pool = old_pool;
3579 /* If usage_wanted is set we call the usage function - which never returns */
3580 if (usage_wanted) exim_usage(called_as);
3582 /* Arguments have been processed. Check for incompatibilities. */
3583 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3584 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3585 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3586 || filter_test != FTEST_NONE
3587 || msg_action_arg > 0 && !one_msg_action
3589 || ( msg_action_arg > 0
3590 && ( f.daemon_listen || queue_interval > 0 || list_options
3591 || checking && msg_action != MSG_LOAD
3592 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3594 || ( (f.daemon_listen || queue_interval > 0)
3595 && ( sender_address || list_options || list_queue || checking
3598 || f.daemon_listen && queue_interval == 0
3599 || f.inetd_wait_mode && queue_interval >= 0
3601 && ( checking || smtp_input || extract_recipients
3602 || filter_test != FTEST_NONE || bi_option
3604 || ( verify_address_mode
3605 && ( f.address_test_mode || smtp_input || extract_recipients
3606 || filter_test != FTEST_NONE || bi_option
3608 || ( f.address_test_mode
3609 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3613 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3615 || deliver_selectstring && queue_interval < 0
3616 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3618 exim_fail("exim: incompatible command-line options or arguments\n");
3620 /* If debugging is set up, set the file and the file descriptor to pass on to
3621 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3622 to run in the foreground. */
3624 if (debug_selector != 0)
3626 debug_file = stderr;
3627 debug_fd = fileno(debug_file);
3628 f.background_daemon = FALSE;
3629 testharness_pause_ms(100); /* lets caller finish */
3630 if (debug_selector != D_v) /* -v only doesn't show this */
3632 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3633 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3635 if (!version_printed)
3636 show_whats_supported(stderr);
3640 /* When started with root privilege, ensure that the limits on the number of
3641 open files and the number of processes (where that is accessible) are
3642 sufficiently large, or are unset, in case Exim has been called from an
3643 environment where the limits are screwed down. Not all OS have the ability to
3644 change some of these limits. */
3648 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3654 #ifdef RLIMIT_NOFILE
3655 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3657 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3659 rlp.rlim_cur = rlp.rlim_max = 0;
3662 /* I originally chose 1000 as a nice big number that was unlikely to
3663 be exceeded. It turns out that some older OS have a fixed upper limit of
3666 if (rlp.rlim_cur < 1000)
3668 rlp.rlim_cur = rlp.rlim_max = 1000;
3669 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3671 rlp.rlim_cur = rlp.rlim_max = 256;
3672 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3673 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3680 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3682 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3684 rlp.rlim_cur = rlp.rlim_max = 0;
3687 #ifdef RLIM_INFINITY
3688 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3690 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3692 if (rlp.rlim_cur < 1000)
3694 rlp.rlim_cur = rlp.rlim_max = 1000;
3696 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3697 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3703 /* Exim is normally entered as root (but some special configurations are
3704 possible that don't do this). However, it always spins off sub-processes that
3705 set their uid and gid as required for local delivery. We don't want to pass on
3706 any extra groups that root may belong to, so we want to get rid of them all at
3709 We need to obey setgroups() at this stage, before possibly giving up root
3710 privilege for a changed configuration file, but later on we might need to
3711 check on the additional groups for the admin user privilege - can't do that
3712 till after reading the config, which might specify the exim gid. Therefore,
3713 save the group list here first. */
3715 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3716 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3718 /* There is a fundamental difference in some BSD systems in the matter of
3719 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3720 known not to be different. On the "different" systems there is a single group
3721 list, and the first entry in it is the current group. On all other versions of
3722 Unix there is a supplementary group list, which is in *addition* to the current
3723 group. Consequently, to get rid of all extraneous groups on a "standard" system
3724 you pass over 0 groups to setgroups(), while on a "different" system you pass
3725 over a single group - the current group, which is always the first group in the
3726 list. Calling setgroups() with zero groups on a "different" system results in
3727 an error return. The following code should cope with both types of system.
3729 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3730 the "setgroups() with zero groups" - and changes the egid.
3731 Thanks to that we had to stash the original_egid above, for use below
3732 in the call to exim_setugid().
3734 However, if this process isn't running as root, setgroups() can't be used
3735 since you have to be root to run it, even if throwing away groups.
3736 Except, sigh, for Hurd - where you can.
3737 Not being root here happens only in some unusual configurations. */
3740 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3741 && setgroups(0, NULL) != 0
3743 && setgroups(1, group_list) != 0)
3744 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3746 /* If the configuration file name has been altered by an argument on the
3747 command line (either a new file name or a macro definition) and the caller is
3748 not root, or if this is a filter testing run, remove any setuid privilege the
3749 program has and run as the underlying user.
3751 The exim user is locked out of this, which severely restricts the use of -C
3754 Otherwise, set the real ids to the effective values (should be root unless run
3755 from inetd, which it can either be root or the exim uid, if one is configured).
3757 There is a private mechanism for bypassing some of this, in order to make it
3758 possible to test lots of configurations automatically, without having either to
3759 recompile each time, or to patch in an actual configuration file name and other
3760 values (such as the path name). If running in the test harness, pretend that
3761 configuration file changes and macro definitions haven't happened. */
3764 (!f.trusted_config || /* Config changed, or */
3765 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3766 real_uid != root_uid && /* Not root, and */
3767 !f.running_in_test_harness /* Not fudged */
3769 expansion_test /* expansion testing */
3771 filter_test != FTEST_NONE) /* Filter testing */
3773 setgroups(group_count, group_list);
3774 exim_setugid(real_uid, real_gid, FALSE,
3775 US"-C, -D, -be or -bf forces real uid");
3776 removed_privilege = TRUE;
3778 /* In the normal case when Exim is called like this, stderr is available
3779 and should be used for any logging information because attempts to write
3780 to the log will usually fail. To arrange this, we unset really_exim. However,
3781 if no stderr is available there is no point - we might as well have a go
3782 at the log (if it fails, syslog will be written).
3784 Note that if the invoker is Exim, the logs remain available. Messing with
3785 this causes unlogged successful deliveries. */
3787 if (log_stderr && real_uid != exim_uid)
3788 f.really_exim = FALSE;
3791 /* Privilege is to be retained for the moment. It may be dropped later,
3792 depending on the job that this Exim process has been asked to do. For now, set
3793 the real uid to the effective so that subsequent re-execs of Exim are done by a
3797 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3799 /* If testing a filter, open the file(s) now, before wasting time doing other
3800 setups and reading the message. */
3802 if (filter_test & FTEST_SYSTEM)
3803 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3804 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3807 if (filter_test & FTEST_USER)
3808 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3809 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3812 /* Initialise lookup_list
3813 If debugging, already called above via version reporting.
3814 In either case, we initialise the list of available lookups while running
3815 as root. All dynamically modules are loaded from a directory which is
3816 hard-coded into the binary and is code which, if not a module, would be
3817 part of Exim already. Ability to modify the content of the directory
3818 is equivalent to the ability to modify a setuid binary!
3820 This needs to happen before we read the main configuration. */
3824 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3827 /* Read the main runtime configuration data; this gives up if there
3828 is a failure. It leaves the configuration file open so that the subsequent
3829 configuration data for delivery can be read if needed.
3831 NOTE: immediately after opening the configuration file we change the working
3832 directory to "/"! Later we change to $spool_directory. We do it there, because
3833 during readconf_main() some expansion takes place already. */
3835 /* Store the initial cwd before we change directories. Can be NULL if the
3836 dir has already been unlinked. */
3837 initial_cwd = os_getcwd(NULL, 0);
3840 -be[m] expansion test -
3841 -b[fF] filter test new
3843 -bmalware malware_test_file new
3845 -brw rewrite test new
3847 -bv[s] address verify -
3849 -bP <option> (except -bP config, which sets list_config)
3851 If any of these options is set, we suppress warnings about configuration
3852 issues (currently about tls_advertise_hosts and keep_environment not being
3856 #ifdef MEASURE_TIMING
3857 struct timeval t0, diff;
3858 (void)gettimeofday(&t0, NULL);
3861 readconf_main(checking || list_options);
3863 #ifdef MEASURE_TIMING
3864 report_time_since(&t0, US"readconf_main (delta)");
3869 /* Now in directory "/" */
3871 if (cleanup_environment() == FALSE)
3872 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3875 /* If an action on specific messages is requested, or if a daemon or queue
3876 runner is being started, we need to know if Exim was called by an admin user.
3877 This is the case if the real user is root or exim, or if the real group is
3878 exim, or if one of the supplementary groups is exim or a group listed in
3879 admin_groups. We don't fail all message actions immediately if not admin_user,
3880 since some actions can be performed by non-admin users. Instead, set admin_user
3881 for later interrogation. */
3883 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3884 f.admin_user = TRUE;
3886 for (int i = 0; i < group_count && !f.admin_user; i++)
3887 if (group_list[i] == exim_gid)
3888 f.admin_user = TRUE;
3889 else if (admin_groups)
3890 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3891 if (admin_groups[j] == group_list[i])
3892 f.admin_user = TRUE;
3894 /* Another group of privileged users are the trusted users. These are root,
3895 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3896 are permitted to specify sender_addresses with -f on the command line, and
3897 other message parameters as well. */
3899 if (real_uid == root_uid || real_uid == exim_uid)
3900 f.trusted_caller = TRUE;
3904 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3905 if (trusted_users[i] == real_uid)
3906 f.trusted_caller = TRUE;
3909 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3910 if (trusted_groups[i] == real_gid)
3911 f.trusted_caller = TRUE;
3912 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3913 if (trusted_groups[i] == group_list[j])
3914 f.trusted_caller = TRUE;
3917 /* At this point, we know if the user is privileged and some command-line
3918 options become possibly impermissible, depending upon the configuration file. */
3920 if (checking && commandline_checks_require_admin && !f.admin_user)
3921 exim_fail("exim: those command-line flags are set to require admin\n");
3923 /* Handle the decoding of logging options. */
3925 decode_bits(log_selector, log_selector_size, log_notall,
3926 log_selector_string, log_options, log_options_count, US"log", 0);
3930 debug_printf("configuration file is %s\n", config_main_filename);
3931 debug_printf("log selectors =");
3932 for (int i = 0; i < log_selector_size; i++)
3933 debug_printf(" %08x", log_selector[i]);
3937 /* If domain literals are not allowed, check the sender address that was
3938 supplied with -f. Ditto for a stripped trailing dot. */
3942 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3943 exim_fail("exim: bad -f address \"%s\": domain literals not "
3944 "allowed\n", sender_address);
3945 if (f_end_dot && !strip_trailing_dot)
3946 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3947 "(trailing dot not allowed)\n", sender_address);
3950 /* See if an admin user overrode our logging. */
3952 if (cmdline_syslog_name)
3955 syslog_processname = cmdline_syslog_name;
3956 log_file_path = string_copy(CUS"syslog");
3959 /* not a panic, non-privileged users should not be able to spam paniclog */
3961 "exim: you lack sufficient privilege to specify syslog process name\n");
3963 /* Paranoia check of maximum lengths of certain strings. There is a check
3964 on the length of the log file path in log.c, which will come into effect
3965 if there are any calls to write the log earlier than this. However, if we
3966 get this far but the string is very long, it is better to stop now than to
3967 carry on and (e.g.) receive a message and then have to collapse. The call to
3968 log_write() from here will cause the ultimate panic collapse if the complete
3969 file name exceeds the buffer length. */
3971 if (Ustrlen(log_file_path) > 200)
3972 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3973 "log_file_path is longer than 200 chars: aborting");
3975 if (Ustrlen(pid_file_path) > 200)
3976 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3977 "pid_file_path is longer than 200 chars: aborting");
3979 if (Ustrlen(spool_directory) > 200)
3980 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3981 "spool_directory is longer than 200 chars: aborting");
3983 /* Length check on the process name given to syslog for its TAG field,
3984 which is only permitted to be 32 characters or less. See RFC 3164. */
3986 if (Ustrlen(syslog_processname) > 32)
3987 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3988 "syslog_processname is longer than 32 chars: aborting");
3993 log_write(0, LOG_MAIN, "%s", log_oneline);
3994 return EXIT_SUCCESS;
3997 return EXIT_FAILURE;
3999 /* In some operating systems, the environment variable TMPDIR controls where
4000 temporary files are created; Exim doesn't use these (apart from when delivering
4001 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4002 If TMPDIR is found in the environment, reset it to the value defined in the
4003 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4004 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4005 EXIM_TMPDIR by the build scripts.
4009 if (environ) for (uschar ** p = USS environ; *p; p++)
4010 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4012 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4013 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4015 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4019 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4020 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4021 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4022 called by a user who has set the TZ variable. This then affects the timestamps
4023 in log files and in Received: headers, and any created Date: header lines. The
4024 required timezone is settable in the configuration file, so nothing can be done
4025 about this earlier - but hopefully nothing will normally be logged earlier than
4026 this. We have to make a new environment if TZ is wrong, but don't bother if
4027 timestamps_utc is set, because then all times are in UTC anyway. */
4029 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4030 f.timestamps_utc = TRUE;
4033 uschar *envtz = US getenv("TZ");
4035 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4036 : timezone_string != NULL
4039 uschar **p = USS environ;
4043 if (environ) while (*p++) count++;
4044 if (!envtz) count++;
4045 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4046 if (environ) for (p = USS environ; *p; p++)
4047 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4048 if (timezone_string)
4050 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4051 sprintf(CS *newp++, "TZ=%s", timezone_string);
4056 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4057 tod_stamp(tod_log));
4061 /* Handle the case when we have removed the setuid privilege because of -C or
4062 -D. This means that the caller of Exim was not root.
4064 There is a problem if we were running as the Exim user. The sysadmin may
4065 expect this case to retain privilege because "the binary was called by the
4066 Exim user", but it hasn't, because either the -D option set macros, or the
4067 -C option set a non-trusted configuration file. There are two possibilities:
4069 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4070 to do message deliveries. Thus, the fact that it is running as a
4071 non-privileged user is plausible, and might be wanted in some special
4072 configurations. However, really_exim will have been set false when
4073 privilege was dropped, to stop Exim trying to write to its normal log
4074 files. Therefore, re-enable normal log processing, assuming the sysadmin
4075 has set up the log directory correctly.
4077 (2) If deliver_drop_privilege is not set, the configuration won't work as
4078 apparently intended, and so we log a panic message. In order to retain
4079 root for -C or -D, the caller must either be root or be invoking a
4080 trusted configuration file (when deliver_drop_privilege is false). */
4082 if ( removed_privilege
4083 && (!f.trusted_config || opt_D_used)
4084 && real_uid == exim_uid)
4085 if (deliver_drop_privilege)
4086 f.really_exim = TRUE; /* let logging work normally */
4088 log_write(0, LOG_MAIN|LOG_PANIC,
4089 "exim user lost privilege for using %s option",
4090 f.trusted_config? "-D" : "-C");
4092 /* Start up Perl interpreter if Perl support is configured and there is a
4093 perl_startup option, and the configuration or the command line specifies
4094 initializing starting. Note that the global variables are actually called
4095 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4098 if (perl_start_option != 0)
4099 opt_perl_at_start = (perl_start_option > 0);
4100 if (opt_perl_at_start && opt_perl_startup != NULL)
4103 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4104 if ((errstr = init_perl(opt_perl_startup)))
4105 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4106 opt_perl_started = TRUE;
4108 #endif /* EXIM_PERL */
4110 /* Log the arguments of the call if the configuration file said so. This is
4111 a debugging feature for finding out what arguments certain MUAs actually use.
4112 Don't attempt it if logging is disabled, or if listing variables or if
4113 verifying/testing addresses or expansions. */
4115 if ( (debug_selector & D_any || LOGGING(arguments))
4116 && f.really_exim && !list_options && !checking)
4118 uschar *p = big_buffer;
4119 Ustrcpy(p, US"cwd= (failed)");
4125 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4126 p += 4 + Ustrlen(initial_cwd);
4127 /* in case p is near the end and we don't provide enough space for
4128 * string_format to be willing to write. */
4132 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4134 for (int i = 0; i < argc; i++)
4136 int len = Ustrlen(argv[i]);
4137 const uschar *printing;
4139 if (p + len + 8 >= big_buffer + big_buffer_size)
4141 Ustrcpy(p, US" ...");
4142 log_write(0, LOG_MAIN, "%s", big_buffer);
4143 Ustrcpy(big_buffer, US"...");
4146 printing = string_printing(argv[i]);
4147 if (!*printing) quote = US"\"";
4150 const uschar *pp = printing;
4152 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4154 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4155 (p - big_buffer) - 4), printing, quote);
4158 if (LOGGING(arguments))
4159 log_write(0, LOG_MAIN, "%s", big_buffer);
4161 debug_printf("%s\n", big_buffer);
4164 /* Set the working directory to be the top-level spool directory. We don't rely
4165 on this in the code, which always uses fully qualified names, but it's useful
4166 for core dumps etc. Don't complain if it fails - the spool directory might not
4167 be generally accessible and calls with the -C option (and others) have lost
4168 privilege by now. Before the chdir, we try to ensure that the directory exists.
4171 if (Uchdir(spool_directory) != 0)
4173 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4174 (void) Uchdir(spool_directory);
4177 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4178 alias file. Exim doesn't have such a concept, but this call is screwed into
4179 Sun's YP makefiles. Handle this by calling a configured script, as the real
4180 user who called Exim. The -oA option can be used to pass an argument to the
4185 (void) fclose(config_file);
4186 if (bi_command && *bi_command)
4190 argv[i++] = bi_command;
4191 if (alias_arg) argv[i++] = alias_arg;
4194 setgroups(group_count, group_list);
4195 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4197 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4198 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4200 execv(CS argv[0], (char *const *)argv);
4201 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4205 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4210 /* We moved the admin/trusted check to be immediately after reading the
4211 configuration file. We leave these prints here to ensure that syslog setup,
4212 logfile setup, and so on has already happened. */
4214 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4215 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4217 /* Only an admin user may start the daemon or force a queue run in the default
4218 configuration, but the queue run restriction can be relaxed. Only an admin
4219 user may request that a message be returned to its sender forthwith. Only an
4220 admin user may specify a debug level greater than D_v (because it might show
4221 passwords, etc. in lookup queries). Only an admin user may request a queue
4222 count. Only an admin user can use the test interface to scan for email
4223 (because Exim will be in the spool dir and able to look at mails). */
4227 BOOL debugset = (debug_selector & ~D_v) != 0;
4228 if ( deliver_give_up || f.daemon_listen || malware_test_file
4229 || count_queue && queue_list_requires_admin
4230 || list_queue && queue_list_requires_admin
4231 || queue_interval >= 0 && prod_requires_admin
4232 || queue_name_dest && prod_requires_admin
4233 || debugset && !f.running_in_test_harness
4235 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4238 /* If the real user is not root or the exim uid, the argument for passing
4239 in an open TCP/IP connection for another message is not permitted, nor is
4240 running with the -N option for any delivery action, unless this call to exim is
4241 one that supplied an input message, or we are using a patched exim for
4242 regression testing. */
4244 if ( real_uid != root_uid && real_uid != exim_uid
4245 && ( continue_hostname
4247 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4249 && !f.running_in_test_harness
4251 exim_fail("exim: Permission denied\n");
4253 /* If the caller is not trusted, certain arguments are ignored when running for
4254 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4255 Note that authority for performing certain actions on messages is tested in the
4256 queue_action() function. */
4258 if (!f.trusted_caller && !checking)
4260 sender_host_name = sender_host_address = interface_address =
4261 sender_ident = received_protocol = NULL;
4262 sender_host_port = interface_port = 0;
4263 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4266 /* If a sender host address is set, extract the optional port number off the
4267 end of it and check its syntax. Do the same thing for the interface address.
4268 Exim exits if the syntax is bad. */
4272 if (sender_host_address)
4273 sender_host_port = check_port(sender_host_address);
4274 if (interface_address)
4275 interface_port = check_port(interface_address);
4278 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4281 if (f.trusted_caller)
4283 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4284 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4287 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4290 /* If an SMTP message is being received check to see if the standard input is a
4291 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4292 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4297 union sockaddr_46 inetd_sock;
4298 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4299 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4301 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4302 if (family == AF_INET || family == AF_INET6)
4304 union sockaddr_46 interface_sock;
4305 size = sizeof(interface_sock);
4307 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4308 interface_address = host_ntoa(-1, &interface_sock, NULL,
4311 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4313 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4316 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4317 NULL, &sender_host_port);
4318 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4319 "inetd is not supported when mua_wrapper is set");
4323 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4328 /* If the load average is going to be needed while receiving a message, get it
4329 now for those OS that require the first call to os_getloadavg() to be done as
4330 root. There will be further calls later for each message received. */
4332 #ifdef LOAD_AVG_NEEDS_ROOT
4333 if ( receiving_message
4334 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4335 load_average = OS_GETLOADAVG();
4338 /* The queue_only configuration option can be overridden by -odx on the command
4339 line, except that if queue_only_override is false, queue_only cannot be unset
4340 from the command line. */
4342 if (queue_only_set && (queue_only_override || arg_queue_only))
4343 queue_only = arg_queue_only;
4345 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4348 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4349 if (arg_smtp_receive_timeout >= 0)
4350 smtp_receive_timeout = arg_smtp_receive_timeout;
4352 /* If Exim was started with root privilege, unless we have already removed the
4353 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4354 except when starting the daemon or doing some kind of delivery or address
4355 testing (-bt). These are the only cases when root need to be retained. We run
4356 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4357 retained only for starting the daemon. We always do the initgroups() in this
4358 situation (controlled by the TRUE below), in order to be as close as possible
4359 to the state Exim usually runs in. */
4361 if ( !unprivileged /* originally had root AND */
4362 && !removed_privilege /* still got root AND */
4363 && !f.daemon_listen /* not starting the daemon */
4364 && queue_interval <= 0 /* (either kind of daemon) */
4365 && ( /* AND EITHER */
4366 deliver_drop_privilege /* requested unprivileged */
4368 queue_interval < 0 /* not running the queue */
4369 && ( msg_action_arg < 0 /* and */
4370 || msg_action != MSG_DELIVER /* not delivering */
4372 && (!checking || !f.address_test_mode) /* not address checking */
4373 && !rcpt_verify_quota /* and not quota checking */
4375 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4377 /* When we are retaining a privileged uid, we still change to the exim gid. */
4382 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4383 rv = setgid(exim_gid);
4384 /* Impact of failure is that some stuff might end up with an incorrect group.
4385 We track this for failures from root, since any attempt to change privilege
4386 by root should succeed and failures should be examined. For non-root,
4387 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4388 no need to complain then. */
4390 if (!(unprivileged || removed_privilege))
4391 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4394 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4395 (long int)exim_gid, strerror(errno));
4399 /* Handle a request to scan a file for malware */
4400 if (malware_test_file)
4402 #ifdef WITH_CONTENT_SCAN
4404 set_process_info("scanning file for malware");
4405 if ((result = malware_in_file(malware_test_file)) == FAIL)
4407 printf("No malware found.\n");
4412 printf("Malware lookup returned non-okay/fail: %d\n", result);
4416 printf("Malware found: %s\n", malware_name);
4418 printf("Malware scan detected malware of unknown name.\n");
4420 printf("Malware scanning not enabled at compile time.\n");
4425 /* Handle a request to list the delivery queue */
4429 set_process_info("listing the queue");
4430 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4434 /* Handle a request to count the delivery queue */
4438 set_process_info("counting the queue");
4439 fprintf(stdout, "%u\n", queue_count());
4443 /* Handle actions on specific messages, except for the force delivery and
4444 message load actions, which are done below. Some actions take a whole list of
4445 message ids, which are known to continue up to the end of the arguments. Others
4446 take a single message id and then operate on the recipients list. */
4448 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4450 int yield = EXIT_SUCCESS;
4451 set_process_info("acting on specified messages");
4453 /* ACL definitions may be needed when removing a message (-Mrm) because
4454 event_action gets expanded */
4456 if (msg_action == MSG_REMOVE)
4459 if (!one_msg_action)
4461 for (i = msg_action_arg; i < argc; i++)
4462 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4463 yield = EXIT_FAILURE;
4466 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4467 default: printf("\n"); break;
4471 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4472 recipients_arg)) yield = EXIT_FAILURE;
4476 /* We used to set up here to skip reading the ACL section, on
4477 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4478 Now, since the intro of the ${acl } expansion, ACL definitions may be
4479 needed in transports so we lost the optimisation. */
4482 #ifdef MEASURE_TIMING
4483 struct timeval t0, diff;
4484 (void)gettimeofday(&t0, NULL);
4489 #ifdef MEASURE_TIMING
4490 report_time_since(&t0, US"readconf_rest (delta)");
4494 /* Handle a request to check quota */
4495 if (rcpt_verify_quota)
4496 if (real_uid != root_uid && real_uid != exim_uid)
4497 exim_fail("exim: Permission denied\n");
4498 else if (recipients_arg >= argc)
4499 exim_fail("exim: missing recipient for quota check\n");
4502 verify_quota(argv[recipients_arg]);
4503 exim_exit(EXIT_SUCCESS);
4506 /* Handle the -brt option. This is for checking out retry configurations.
4507 The next three arguments are a domain name or a complete address, and
4508 optionally two error numbers. All it does is to call the function that
4509 scans the retry configuration data. */
4511 if (test_retry_arg >= 0)
4513 retry_config *yield;
4514 int basic_errno = 0;
4518 if (test_retry_arg >= argc)
4520 printf("-brt needs a domain or address argument\n");
4521 exim_exit(EXIT_FAILURE);
4523 s1 = argv[test_retry_arg++];
4526 /* If the first argument contains no @ and no . it might be a local user
4527 or it might be a single-component name. Treat as a domain. */
4529 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4531 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4532 "being \ntreated as a one-component domain, not as a local part.\n\n",
4536 /* There may be an optional second domain arg. */
4538 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4539 s2 = argv[test_retry_arg++];
4541 /* The final arg is an error name */
4543 if (test_retry_arg < argc)
4545 uschar *ss = argv[test_retry_arg];
4547 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4550 printf("%s\n", CS error);
4551 return EXIT_FAILURE;
4554 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4555 code > 100 as an error is for matching codes to the decade. Turn them into
4556 a real error code, off the decade. */
4558 if (basic_errno == ERRNO_MAIL4XX ||
4559 basic_errno == ERRNO_RCPT4XX ||
4560 basic_errno == ERRNO_DATA4XX)
4562 int code = (more_errno >> 8) & 255;
4564 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4565 else if (code > 100)
4566 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4570 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4571 printf("No retry information found\n");
4574 more_errno = yield->more_errno;
4575 printf("Retry rule: %s ", yield->pattern);
4577 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4579 printf("quota%s%s ",
4580 (more_errno > 0)? "_" : "",
4581 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4583 else if (yield->basic_errno == ECONNREFUSED)
4585 printf("refused%s%s ",
4586 (more_errno > 0)? "_" : "",
4587 (more_errno == 'M')? "MX" :
4588 (more_errno == 'A')? "A" : "");
4590 else if (yield->basic_errno == ETIMEDOUT)
4593 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4595 if (more_errno != 0) printf("_%s",
4596 (more_errno == 'M')? "MX" : "A");
4599 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4600 printf("auth_failed ");
4603 for (retry_rule * r = yield->rules; r; r = r->next)
4605 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4606 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4612 printf(",%d.", x/1000);
4626 exim_exit(EXIT_SUCCESS);
4629 /* Handle a request to list one or more configuration options */
4630 /* If -n was set, we suppress some information */
4635 set_process_info("listing variables");
4636 if (recipients_arg >= argc)
4637 fail = !readconf_print(US"all", NULL, flag_n);
4638 else for (i = recipients_arg; i < argc; i++)
4641 (Ustrcmp(argv[i], "router") == 0 ||
4642 Ustrcmp(argv[i], "transport") == 0 ||
4643 Ustrcmp(argv[i], "authenticator") == 0 ||
4644 Ustrcmp(argv[i], "macro") == 0 ||
4645 Ustrcmp(argv[i], "environment") == 0))
4647 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4651 fail = !readconf_print(argv[i], NULL, flag_n);
4653 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4658 set_process_info("listing config");
4659 exim_exit(readconf_print(US"config", NULL, flag_n)
4660 ? EXIT_SUCCESS : EXIT_FAILURE);
4664 /* Initialise subsystems as required. */
4668 /* Handle a request to deliver one or more messages that are already on the
4669 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4670 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4672 Delivery of specific messages is typically used for a small number when
4673 prodding by hand (when the option forced_delivery will be set) or when
4674 re-execing to regain root privilege. Each message delivery must happen in a
4675 separate process, so we fork a process for each one, and run them sequentially
4676 so that debugging output doesn't get intertwined, and to avoid spawning too
4677 many processes if a long list is given. However, don't fork for the last one;
4678 this saves a process in the common case when Exim is called to deliver just one
4681 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4683 if (prod_requires_admin && !f.admin_user)
4685 fprintf(stderr, "exim: Permission denied\n");
4686 exim_exit(EXIT_FAILURE);
4688 set_process_info("delivering specified messages");
4689 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4690 for (i = msg_action_arg; i < argc; i++)
4694 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4695 that runs into a later copy into the untainted global message_id[] */
4697 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4698 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4700 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4701 exim_underbar_exit(EXIT_SUCCESS);
4705 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4707 exim_exit(EXIT_FAILURE);
4711 exim_exit(EXIT_SUCCESS);
4715 /* If only a single queue run is requested, without SMTP listening, we can just
4716 turn into a queue runner, with an optional starting message id. */
4718 if (queue_interval == 0 && !f.daemon_listen)
4720 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4721 start_queue_run_id ? US" starting at " : US"",
4722 start_queue_run_id ? start_queue_run_id: US"",
4723 stop_queue_run_id ? US" stopping at " : US"",
4724 stop_queue_run_id ? stop_queue_run_id : US"");
4726 set_process_info("running the '%s' queue (single queue run)", queue_name);
4728 set_process_info("running the queue (single queue run)");
4729 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4730 exim_exit(EXIT_SUCCESS);
4734 /* Find the login name of the real user running this process. This is always
4735 needed when receiving a message, because it is written into the spool file. It
4736 may also be used to construct a from: or a sender: header, and in this case we
4737 need the user's full name as well, so save a copy of it, checked for RFC822
4738 syntax and munged if necessary, if it hasn't previously been set by the -F
4739 argument. We may try to get the passwd entry more than once, in case NIS or
4740 other delays are in evidence. Save the home directory for use in filter testing
4745 if ((pw = getpwuid(real_uid)) != NULL)
4747 originator_login = string_copy(US pw->pw_name);
4748 originator_home = string_copy(US pw->pw_dir);
4750 /* If user name has not been set by -F, set it from the passwd entry
4751 unless -f has been used to set the sender address by a trusted user. */
4753 if (!originator_name)
4755 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4757 uschar *name = US pw->pw_gecos;
4758 uschar *amp = Ustrchr(name, '&');
4761 /* Most Unix specify that a '&' character in the gecos field is
4762 replaced by a copy of the login name, and some even specify that
4763 the first character should be upper cased, so that's what we do. */
4768 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4769 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4770 buffer[loffset] = toupper(buffer[loffset]);
4774 /* If a pattern for matching the gecos field was supplied, apply
4775 it and then expand the name string. */
4777 if (gecos_pattern && gecos_name)
4780 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4782 if (regex_match_and_setup(re, name, 0, -1))
4784 uschar *new_name = expand_string(gecos_name);
4788 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4789 "gecos field \"%s\"\n", new_name, name);
4792 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4793 "\"%s\": %s\n", gecos_name, expand_string_message);
4795 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4796 "gecos field \"%s\"\n", gecos_pattern, name);
4797 store_free((void *)re);
4799 originator_name = string_copy(name);
4802 /* A trusted caller has used -f but not -F */
4804 else originator_name = US"";
4807 /* Break the retry loop */
4812 if (++i > finduser_retries) break;
4816 /* If we cannot get a user login, log the incident and give up, unless the
4817 configuration specifies something to use. When running in the test harness,
4818 any setting of unknown_login overrides the actual name. */
4820 if (!originator_login || f.running_in_test_harness)
4824 originator_login = expand_string(unknown_login);
4825 if (!originator_name && unknown_username)
4826 originator_name = expand_string(unknown_username);
4827 if (!originator_name) originator_name = US"";
4829 if (!originator_login)
4830 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4834 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4837 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4839 /* If a message is created by this call of Exim, the uid/gid of its originator
4840 are those of the caller. These values are overridden if an existing message is
4841 read in from the spool. */
4843 originator_uid = real_uid;
4844 originator_gid = real_gid;
4846 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4847 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4849 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4850 returns. We leave this till here so that the originator_ fields are available
4851 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4854 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4858 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4859 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4860 "mua_wrapper is set");
4863 # ifndef DISABLE_TLS
4864 /* This also checks that the library linkage is working and we can call
4865 routines in it, so call even if tls_require_ciphers is unset */
4867 # ifdef MEASURE_TIMING
4868 struct timeval t0, diff;
4869 (void)gettimeofday(&t0, NULL);
4871 if (!tls_dropprivs_validate_require_cipher(FALSE))
4873 # ifdef MEASURE_TIMING
4874 report_time_since(&t0, US"validate_ciphers (delta)");
4882 /* If the sender ident has not been set (by a trusted caller) set it to
4883 the caller. This will get overwritten below for an inetd call. If a trusted
4884 caller has set it empty, unset it. */
4886 if (!sender_ident) sender_ident = originator_login;
4887 else if (!*sender_ident) sender_ident = NULL;
4889 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4890 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4891 originator_* variables set. */
4893 if (test_rewrite_arg >= 0)
4895 f.really_exim = FALSE;
4896 if (test_rewrite_arg >= argc)
4898 printf("-brw needs an address argument\n");
4899 exim_exit(EXIT_FAILURE);
4901 rewrite_test(argv[test_rewrite_arg]);
4902 exim_exit(EXIT_SUCCESS);
4905 /* A locally-supplied message is considered to be coming from a local user
4906 unless a trusted caller supplies a sender address with -f, or is passing in the
4907 message via SMTP (inetd invocation or otherwise). */
4909 if ( !sender_address && !smtp_input
4910 || !f.trusted_caller && filter_test == FTEST_NONE)
4912 f.sender_local = TRUE;
4914 /* A trusted caller can supply authenticated_sender and authenticated_id
4915 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4916 defaults except when host checking. */
4918 if (!authenticated_sender && !host_checking)
4919 authenticated_sender = string_sprintf("%s@%s", originator_login,
4920 qualify_domain_sender);
4921 if (!authenticated_id && !host_checking)
4922 authenticated_id = originator_login;
4925 /* Trusted callers are always permitted to specify the sender address.
4926 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4927 is specified is the empty address. However, if a trusted caller does not
4928 specify a sender address for SMTP input, we leave sender_address unset. This
4929 causes the MAIL commands to be honoured. */
4931 if ( !smtp_input && !sender_address
4932 || !receive_check_set_sender(sender_address))
4934 /* Either the caller is not permitted to set a general sender, or this is
4935 non-SMTP input and the trusted caller has not set a sender. If there is no
4936 sender, or if a sender other than <> is set, override with the originator's
4937 login (which will get qualified below), except when checking things. */
4939 if ( !sender_address /* No sender_address set */
4941 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4942 !checking)) /* Not running tests, including filter tests */
4944 sender_address = originator_login;
4945 f.sender_address_forced = FALSE;
4946 sender_address_domain = 0;
4950 /* Remember whether an untrusted caller set the sender address */
4952 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4954 /* Ensure that the sender address is fully qualified unless it is the empty
4955 address, which indicates an error message, or doesn't exist (root caller, smtp
4956 interface, no -f argument). */
4958 if (sender_address && *sender_address && sender_address_domain == 0)
4959 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4960 qualify_domain_sender);
4962 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4964 /* Handle a request to verify a list of addresses, or test them for delivery.
4965 This must follow the setting of the sender address, since routers can be
4966 predicated upon the sender. If no arguments are given, read addresses from
4967 stdin. Set debug_level to at least D_v to get full output for address testing.
4970 if (verify_address_mode || f.address_test_mode)
4973 int flags = vopt_qualify;
4975 if (verify_address_mode)
4977 if (!verify_as_sender) flags |= vopt_is_recipient;
4978 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4983 flags |= vopt_is_recipient;
4984 debug_selector |= D_v;
4985 debug_file = stderr;
4986 debug_fd = fileno(debug_file);
4987 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4990 if (recipients_arg < argc)
4991 while (recipients_arg < argc)
4993 /* Supplied addresses are tainted since they come from a user */
4994 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4997 BOOL finished = FALSE;
4998 uschar *ss = parse_find_address_end(s, FALSE);
4999 if (*ss == ',') *ss = 0; else finished = TRUE;
5000 test_address(s, flags, &exit_value);
5003 while (*++s == ',' || isspace(*s)) ;
5009 uschar * s = get_stdinput(NULL, NULL);
5011 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
5015 exim_exit(exit_value);
5018 /* Handle expansion checking. Either expand items on the command line, or read
5019 from stdin if there aren't any. If -Mset was specified, load the message so
5020 that its variables can be used, but restrict this facility to admin users.
5021 Otherwise, if -bem was used, read a message from stdin. */
5025 dns_init(FALSE, FALSE, FALSE);
5026 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5028 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
5030 exim_fail("exim: permission denied\n");
5031 message_id = argv[msg_action_arg];
5032 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
5033 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5034 printf ("Failed to load message datafile %s\n", message_id);
5035 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5036 printf ("Failed to load message %s\n", message_id);
5039 /* Read a test message from a file. We fudge it up to be on stdin, saving
5040 stdin itself for later reading of expansion strings. */
5042 else if (expansion_test_message)
5044 int save_stdin = dup(0);
5045 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5047 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5050 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5051 message_ended = END_NOTENDED;
5052 read_message_body(receive_msg(extract_recipients));
5053 message_linecount += body_linecount;
5054 (void)dup2(save_stdin, 0);
5055 (void)close(save_stdin);
5056 clearerr(stdin); /* Required by Darwin */
5059 /* Only admin users may see config-file macros this way */
5061 if (!f.admin_user) macros_user = macros = mlast = NULL;
5063 /* Allow $recipients for this testing */
5065 f.enable_dollar_recipients = TRUE;
5067 /* Expand command line items */
5069 if (recipients_arg < argc)
5070 while (recipients_arg < argc)
5071 expansion_test_line(argv[recipients_arg++]);
5077 char *(*fn_readline)(const char *) = NULL;
5078 void (*fn_addhist)(const char *) = NULL;
5082 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5085 while (s = get_stdinput(fn_readline, fn_addhist))
5086 expansion_test_line(s);
5089 if (dlhandle) dlclose(dlhandle);
5093 /* The data file will be open after -Mset */
5095 if (deliver_datafile >= 0)
5097 (void)close(deliver_datafile);
5098 deliver_datafile = -1;
5101 exim_exit(EXIT_SUCCESS);
5105 /* The active host name is normally the primary host name, but it can be varied
5106 for hosts that want to play several parts at once. We need to ensure that it is
5107 set for host checking, and for receiving messages. */
5109 smtp_active_hostname = primary_hostname;
5110 if (raw_active_hostname != NULL)
5112 uschar *nah = expand_string(raw_active_hostname);
5115 if (!f.expand_string_forcedfail)
5116 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5117 "(smtp_active_hostname): %s", raw_active_hostname,
5118 expand_string_message);
5120 else if (nah[0] != 0) smtp_active_hostname = nah;
5123 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5124 given IP address so that the blocking and relay configuration can be tested.
5125 Unless a sender_ident was set by -oMt, we discard it (the default is the
5126 caller's login name). An RFC 1413 call is made only if we are running in the
5127 test harness and an incoming interface and both ports are specified, because
5128 there is no TCP/IP call to find the ident for. */
5135 if (!sender_ident_set)
5137 sender_ident = NULL;
5138 if (f.running_in_test_harness && sender_host_port
5139 && interface_address && interface_port)
5140 verify_get_ident(1223); /* note hardwired port number */
5143 /* In case the given address is a non-canonical IPv6 address, canonicalize
5144 it. The code works for both IPv4 and IPv6, as it happens. */
5146 size = host_aton(sender_host_address, x);
5147 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5148 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5150 /* Now set up for testing */
5152 host_build_sender_fullhost();
5156 f.sender_local = FALSE;
5157 f.sender_host_notsocket = TRUE;
5158 debug_file = stderr;
5159 debug_fd = fileno(debug_file);
5160 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5161 "**** but without any ident (RFC 1413) callback.\n"
5162 "**** This is not for real!\n\n",
5163 sender_host_address);
5165 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5166 if (verify_check_host(&hosts_connection_nolog) == OK)
5167 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5168 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5170 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5171 because a log line has already been written for all its failure exists
5172 (usually "connection refused: <reason>") and writing another one is
5173 unnecessary clutter. */
5175 if (smtp_start_session())
5178 for (; (reset_point = store_mark()); store_reset(reset_point))
5180 if (smtp_setup_msg() <= 0) break;
5181 if (!receive_msg(FALSE)) break;
5183 return_path = sender_address = NULL;
5184 dnslist_domain = dnslist_matched = NULL;
5185 #ifndef DISABLE_DKIM
5186 dkim_cur_signer = NULL;
5189 deliver_localpart_orig = NULL;
5190 deliver_domain_orig = NULL;
5191 callout_address = sending_ip_address = NULL;
5192 deliver_localpart_data = deliver_domain_data =
5193 recipient_data = sender_data = NULL;
5194 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5198 exim_exit(EXIT_SUCCESS);
5202 /* Arrange for message reception if recipients or SMTP were specified;
5203 otherwise complain unless a version print (-bV) happened or this is a filter
5204 verification test or info dump.
5205 In the former case, show the configuration file name. */
5207 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5209 if (version_printed)
5211 if (Ustrchr(config_main_filelist, ':'))
5212 printf("Configuration file search path is %s\n", config_main_filelist);
5213 printf("Configuration file is %s\n", config_main_filename);
5214 return EXIT_SUCCESS;
5217 if (info_flag != CMDINFO_NONE)
5219 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5220 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5223 if (filter_test == FTEST_NONE)
5224 exim_usage(called_as);
5228 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5229 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5230 that we are not called from inetd, because that is rejected above. The
5231 following configuration settings are forced here:
5233 (1) Synchronous delivery (-odi)
5234 (2) Errors to stderr (-oep == -oeq)
5235 (3) No parallel remote delivery
5236 (4) Unprivileged delivery
5238 We don't force overall queueing options because there are several of them;
5239 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5240 to override any SMTP queueing. */
5244 f.synchronous_delivery = TRUE;
5245 arg_error_handling = ERRORS_STDERR;
5246 remote_max_parallel = 1;
5247 deliver_drop_privilege = TRUE;
5248 f.queue_smtp = FALSE;
5249 queue_smtp_domains = NULL;
5251 message_utf8_downconvert = -1; /* convert-if-needed */
5256 /* Prepare to accept one or more new messages on the standard input. When a
5257 message has been read, its id is returned in message_id[]. If doing immediate
5258 delivery, we fork a delivery process for each received message, except for the
5259 last one, where we can save a process switch.
5261 It is only in non-smtp mode that error_handling is allowed to be changed from
5262 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5263 sendmail error modes other than -oem ever actually used? Later: yes.) */
5265 if (!smtp_input) error_handling = arg_error_handling;
5267 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5268 logging being sent down the socket and make an identd call to get the
5271 else if (f.is_inetd)
5273 (void)fclose(stderr);
5274 exim_nullstd(); /* Re-open to /dev/null */
5275 verify_get_ident(IDENT_PORT);
5276 host_build_sender_fullhost();
5277 set_process_info("handling incoming connection from %s via inetd",
5281 /* If the sender host address has been set, build sender_fullhost if it hasn't
5282 already been done (which it will have been for inetd). This caters for the
5283 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5284 so that the test for IP options is skipped for -bs input. */
5286 if (sender_host_address && !sender_fullhost)
5288 host_build_sender_fullhost();
5289 set_process_info("handling incoming connection from %s via -oMa",
5291 f.sender_host_notsocket = TRUE;
5294 /* Otherwise, set the sender host as unknown except for inetd calls. This
5295 prevents host checking in the case of -bs not from inetd and also for -bS. */
5297 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5299 /* If stdout does not exist, then dup stdin to stdout. This can happen
5300 if exim is started from inetd. In this case fd 0 will be set to the socket,
5301 but fd 1 will not be set. This also happens for passed SMTP channels. */
5303 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5305 /* Set up the incoming protocol name and the state of the program. Root is
5306 allowed to force received protocol via the -oMr option above. If we have come
5307 via inetd, the process info has already been set up. We don't set
5308 received_protocol here for smtp input, as it varies according to
5309 batch/HELO/EHLO/AUTH/TLS. */
5313 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5314 smtp_batched_input? "batched " : "",
5315 (sender_address!= NULL)? sender_address : originator_login);
5319 int old_pool = store_pool;
5320 store_pool = POOL_PERM;
5321 if (!received_protocol)
5322 received_protocol = string_sprintf("local%s", called_as);
5323 store_pool = old_pool;
5324 set_process_info("accepting a local non-SMTP message from <%s>",
5328 /* Initialize the session_local_queue-only flag (this will be ignored if
5329 mua_wrapper is set) */
5332 session_local_queue_only = queue_only;
5334 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5335 the spool if so configured. On failure, we must not attempt to send an error
5336 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5337 error code is given.) */
5339 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5340 exim_fail("exim: insufficient disk space\n");
5342 /* If this is smtp input of any kind, real or batched, handle the start of the
5345 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5346 because a log line has already been written for all its failure exists
5347 (usually "connection refused: <reason>") and writing another one is
5348 unnecessary clutter. */
5354 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5355 if (verify_check_host(&hosts_connection_nolog) == OK)
5356 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5357 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5358 if (!smtp_start_session())
5361 exim_exit(EXIT_SUCCESS);
5365 /* Otherwise, set up the input size limit here. */
5369 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5370 if (expand_string_message)
5371 if (thismessage_size_limit == -1)
5372 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5373 "message_size_limit: %s", expand_string_message);
5375 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5376 "message_size_limit: %s", expand_string_message);
5379 /* Loop for several messages when reading SMTP input. If we fork any child
5380 processes, we don't want to wait for them unless synchronous delivery is
5381 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5382 same as SIG_DFL, despite the fact that documentation often lists the default as
5383 "ignore". This is a confusing area. This is what I know:
5385 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5386 processes that complete simply to go away without ever becoming defunct. You
5387 can't then wait for them - but we don't want to wait for them in the
5388 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5389 happen for all OS (e.g. *BSD is different).
5391 But that's not the end of the story. Some (many? all?) systems have the
5392 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5393 has by default, so it seems that the difference is merely one of default
5394 (compare restarting vs non-restarting signals).
5396 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5397 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5398 of the loop below. Paranoia rules.
5400 February 2003: That's *still* not the end of the story. There are now versions
5401 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5402 process then calls waitpid(), a grumble is written to the system log, because
5403 this is logically inconsistent. In other words, it doesn't like the paranoia.
5404 As a consequence of this, the waitpid() below is now excluded if we are sure
5405 that SIG_IGN works. */
5407 if (!f.synchronous_delivery)
5410 struct sigaction act;
5411 act.sa_handler = SIG_IGN;
5412 sigemptyset(&(act.sa_mask));
5413 act.sa_flags = SA_NOCLDWAIT;
5414 sigaction(SIGCHLD, &act, NULL);
5416 signal(SIGCHLD, SIG_IGN);
5420 /* Save the current store pool point, for resetting at the start of
5421 each message, and save the real sender address, if any. */
5423 real_sender_address = sender_address;
5425 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5426 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5431 rmark reset_point = store_mark();
5434 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5435 input and build the recipients list, before calling receive_msg() to read the
5436 message proper. Whatever sender address is given in the SMTP transaction is
5437 often ignored for local senders - we use the actual sender, which is normally
5438 either the underlying user running this process or a -f argument provided by
5439 a trusted caller. It is saved in real_sender_address. The test for whether to
5440 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5445 if ((rc = smtp_setup_msg()) > 0)
5447 if (real_sender_address != NULL &&
5448 !receive_check_set_sender(sender_address))
5450 sender_address = raw_sender = real_sender_address;
5451 sender_address_unrewritten = NULL;
5454 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5455 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5456 the very end. The result of the ACL is ignored (as for other non-SMTP
5457 messages). It is run for its potential side effects. */
5459 if (smtp_batched_input && acl_not_smtp_start != NULL)
5461 uschar *user_msg, *log_msg;
5462 f.enable_dollar_recipients = TRUE;
5463 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5464 &user_msg, &log_msg);
5465 f.enable_dollar_recipients = FALSE;
5468 /* Now get the data for the message */
5470 more = receive_msg(extract_recipients);
5471 if (message_id[0] == 0)
5473 cancel_cutthrough_connection(TRUE, US"receive dropped");
5474 if (more) goto moreloop;
5475 smtp_log_no_mail(); /* Log no mail if configured */
5476 exim_exit(EXIT_FAILURE);
5481 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5482 smtp_log_no_mail(); /* Log no mail if configured */
5483 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5487 /* In the non-SMTP case, we have all the information from the command
5488 line, but must process it in case it is in the more general RFC822
5489 format, and in any case, to detect syntax errors. Also, it appears that
5490 the use of comma-separated lists as single arguments is common, so we
5491 had better support them. */
5496 int count = argc - recipients_arg;
5497 uschar **list = argv + recipients_arg;
5499 /* These options cannot be changed dynamically for non-SMTP messages */
5501 f.active_local_sender_retain = local_sender_retain;
5502 f.active_local_from_check = local_from_check;
5504 /* Save before any rewriting */
5506 raw_sender = string_copy(sender_address);
5508 /* Loop for each argument (supplied by user hence tainted) */
5510 for (int i = 0; i < count; i++)
5512 int start, end, domain;
5514 uschar * s = string_copy_taint(list[i], TRUE);
5516 /* Loop for each comma-separated address */
5520 BOOL finished = FALSE;
5522 uschar *ss = parse_find_address_end(s, FALSE);
5524 if (*ss == ',') *ss = 0; else finished = TRUE;
5526 /* Check max recipients - if -t was used, these aren't recipients */
5528 if (recipients_max > 0 && ++rcount > recipients_max &&
5529 !extract_recipients)
5530 if (error_handling == ERRORS_STDERR)
5532 fprintf(stderr, "exim: too many recipients\n");
5533 exim_exit(EXIT_FAILURE);
5537 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5538 errors_sender_rc : EXIT_FAILURE;
5542 BOOL b = allow_utf8_domains;
5543 allow_utf8_domains = TRUE;
5546 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5549 if (string_is_utf8(recipient))
5550 message_smtputf8 = TRUE;
5552 allow_utf8_domains = b;
5555 if (domain == 0 && !f.allow_unqualified_recipient)
5558 errmess = US"unqualified recipient address not allowed";
5562 if (error_handling == ERRORS_STDERR)
5564 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5565 string_printing(list[i]), errmess);
5566 exim_exit(EXIT_FAILURE);
5572 eblock.text1 = string_printing(list[i]);
5573 eblock.text2 = errmess;
5575 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5576 errors_sender_rc : EXIT_FAILURE;
5579 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5582 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5586 /* Show the recipients when debugging */
5590 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5591 if (recipients_list)
5593 debug_printf("Recipients:\n");
5594 for (int i = 0; i < recipients_count; i++)
5595 debug_printf(" %s\n", recipients_list[i].address);
5599 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5600 ignored; rejecting here would just add complication, and it can just as
5601 well be done later. Allow $recipients to be visible in the ACL. */
5603 if (acl_not_smtp_start)
5605 uschar *user_msg, *log_msg;
5606 f.enable_dollar_recipients = TRUE;
5607 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5608 &user_msg, &log_msg);
5609 f.enable_dollar_recipients = FALSE;
5612 /* Pause for a while waiting for input. If none received in that time,
5613 close the logfile, if we had one open; then if we wait for a long-running
5614 datasource (months, in one use-case) log rotation will not leave us holding
5617 if (!receive_timeout)
5619 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5622 FD_ZERO(&r); FD_SET(0, &r);
5623 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5626 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5627 will just read the headers for the message, and not write anything onto the
5630 message_ended = END_NOTENDED;
5631 more = receive_msg(extract_recipients);
5633 /* more is always FALSE here (not SMTP message) when reading a message
5634 for real; when reading the headers of a message for filter testing,
5635 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5637 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5638 } /* Non-SMTP message reception */
5640 /* If this is a filter testing run, there are headers in store, but
5641 no message on the spool. Run the filtering code in testing mode, setting
5642 the domain to the qualify domain and the local part to the current user,
5643 unless they have been set by options. The prefix and suffix are left unset
5644 unless specified. The the return path is set to to the sender unless it has
5645 already been set from a return-path header in the message. */
5647 if (filter_test != FTEST_NONE)
5649 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5650 deliver_domain_orig = deliver_domain;
5651 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5652 deliver_localpart_orig = deliver_localpart;
5653 deliver_localpart_prefix = ftest_prefix;
5654 deliver_localpart_suffix = ftest_suffix;
5655 deliver_home = originator_home;
5659 printf("Return-path copied from sender\n");
5660 return_path = string_copy(sender_address);
5663 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5664 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5666 receive_add_recipient(
5667 string_sprintf("%s%s%s@%s",
5668 ftest_prefix ? ftest_prefix : US"",
5670 ftest_suffix ? ftest_suffix : US"",
5671 deliver_domain), -1);
5673 printf("Recipient = %s\n", recipients_list[0].address);
5674 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5675 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5677 if (chdir("/")) /* Get away from wherever the user is running this from */
5679 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5680 exim_exit(EXIT_FAILURE);
5683 /* Now we run either a system filter test, or a user filter test, or both.
5684 In the latter case, headers added by the system filter will persist and be
5685 available to the user filter. We need to copy the filter variables
5688 if (filter_test & FTEST_SYSTEM)
5689 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5690 exim_exit(EXIT_FAILURE);
5692 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5694 if (filter_test & FTEST_USER)
5695 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5696 exim_exit(EXIT_FAILURE);
5698 exim_exit(EXIT_SUCCESS);
5701 /* Else act on the result of message reception. We should not get here unless
5702 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5703 will be TRUE. If it is not, check on the number of messages received in this
5706 if ( !session_local_queue_only
5707 && smtp_accept_queue_per_connection > 0
5708 && receive_messagecount > smtp_accept_queue_per_connection)
5710 session_local_queue_only = TRUE;
5711 queue_only_reason = 2;
5714 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5715 and queue_only_load is set, check that the load average is below it. If it is
5716 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5717 default), we put the whole session into queue_only mode. It then remains this
5718 way for any subsequent messages on the same SMTP connection. This is a
5719 deliberate choice; even though the load average may fall, it doesn't seem
5720 right to deliver later messages on the same call when not delivering earlier
5721 ones. However, there are odd cases where this is not wanted, so this can be
5722 changed by setting queue_only_load_latch false. */
5724 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5725 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5727 queue_only_reason = 3;
5728 if (queue_only_load_latch) session_local_queue_only = TRUE;
5731 /* If running as an MUA wrapper, all queueing options and freezing options
5735 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5737 /* Log the queueing here, when it will get a message id attached, but
5738 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5741 if (local_queue_only)
5743 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5744 switch(queue_only_reason)
5747 log_write(L_delay_delivery,
5748 LOG_MAIN, "no immediate delivery: more than %d messages "
5749 "received in one connection", smtp_accept_queue_per_connection);
5753 log_write(L_delay_delivery,
5754 LOG_MAIN, "no immediate delivery: load average %.2f",
5755 (double)load_average/1000.0);
5760 else if (f.queue_only_policy || f.deliver_freeze)
5761 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5763 /* Else do the delivery unless the ACL or local_scan() called for queue only
5764 or froze the message. Always deliver in a separate process. A fork failure is
5765 not a disaster, as the delivery will eventually happen on a subsequent queue
5766 run. The search cache must be tidied before the fork, as the parent will
5767 do it before exiting. The child will trigger a lookup failure and
5768 thereby defer the delivery if it tries to use (for example) a cached ldap
5769 connection that the parent has called unbind on. */
5776 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5779 close_unwanted(); /* Close unwanted file descriptors and TLS */
5780 exim_nullstd(); /* Ensure std{in,out,err} exist */
5782 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5783 mode, deliver_drop_privilege is forced TRUE). */
5785 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5787 delivery_re_exec(CEE_EXEC_EXIT);
5788 /* Control does not return here. */
5791 /* No need to re-exec */
5793 rc = deliver_message(message_id, FALSE, FALSE);
5795 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5796 ? EXIT_SUCCESS : EXIT_FAILURE);
5801 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5802 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5803 "process: %s", strerror(errno));
5807 release_cutthrough_connection(US"msg passed for delivery");
5809 /* In the parent, wait if synchronous delivery is required. This will
5810 always be the case in MUA wrapper mode. */
5812 if (f.synchronous_delivery)
5815 while (wait(&status) != pid);
5816 if ((status & 0x00ff) != 0)
5817 log_write(0, LOG_MAIN|LOG_PANIC,
5818 "process %d crashed with signal %d while delivering %s",
5819 (int)pid, status & 0x00ff, message_id);
5820 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5825 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5826 automatically reaps children (see comments above the loop), clear away any
5827 finished subprocesses here, in case there are lots of messages coming in
5828 from the same source. */
5830 #ifndef SIG_IGN_WORKS
5831 while (waitpid(-1, NULL, WNOHANG) > 0);
5835 return_path = sender_address = NULL;
5836 authenticated_sender = NULL;
5837 deliver_localpart_orig = NULL;
5838 deliver_domain_orig = NULL;
5839 deliver_host = deliver_host_address = NULL;
5840 dnslist_domain = dnslist_matched = NULL;
5841 #ifdef WITH_CONTENT_SCAN
5842 malware_name = NULL;
5844 callout_address = NULL;
5845 sending_ip_address = NULL;
5846 deliver_localpart_data = deliver_domain_data =
5847 recipient_data = sender_data = NULL;
5849 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5851 store_reset(reset_point);
5854 exim_exit(EXIT_SUCCESS); /* Never returns */
5855 return 0; /* To stop compiler warning */