1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void *block) { block = block; }
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void *block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
282 sig = sig; /* Keep picky compilers happy */
284 os_non_restarting_signal(SIGALRM, sigalrm_handler);
289 /*************************************************
290 * Sleep for a fractional time interval *
291 *************************************************/
293 /* This function is called by millisleep() and exim_wait_tick() to wait for a
294 period of time that may include a fraction of a second. The coding is somewhat
295 tedious. We do not expect setitimer() ever to fail, but if it does, the process
296 will wait for ever, so we panic in this instance. (There was a case of this
297 when a bug in a function that calls milliwait() caused it to pass invalid data.
298 That's when I added the check. :-)
300 We assume it to be not worth sleeping for under 50us; this value will
301 require revisiting as hardware advances. This avoids the issue of
302 a zero-valued timer setting meaning "never fire".
304 Argument: an itimerval structure containing the interval
309 milliwait(struct itimerval *itval)
312 sigset_t old_sigmask;
313 int save_errno = errno;
315 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
317 (void)sigemptyset(&sigmask); /* Empty mask */
318 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
319 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
320 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
321 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
322 "setitimer() failed: %s", strerror(errno));
323 (void)sigfillset(&sigmask); /* All signals */
324 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
325 (void)sigsuspend(&sigmask); /* Until SIGALRM */
326 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
328 sigalrm_seen = FALSE;
334 /*************************************************
335 * Millisecond sleep function *
336 *************************************************/
338 /* The basic sleep() function has a granularity of 1 second, which is too rough
339 in some cases - for example, when using an increasing delay to slow down
342 Argument: number of millseconds
349 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
350 .it_value = {.tv_sec = msec/1000,
351 .tv_usec = (msec % 1000) * 1000}};
357 /*************************************************
358 * Compare microsecond times *
359 *************************************************/
366 Returns: -1, 0, or +1
370 exim_tvcmp(struct timeval *t1, struct timeval *t2)
372 if (t1->tv_sec > t2->tv_sec) return +1;
373 if (t1->tv_sec < t2->tv_sec) return -1;
374 if (t1->tv_usec > t2->tv_usec) return +1;
375 if (t1->tv_usec < t2->tv_usec) return -1;
382 /*************************************************
383 * Clock tick wait function *
384 *************************************************/
386 #ifdef _POSIX_MONOTONIC_CLOCK
387 # ifdef CLOCK_BOOTTIME
388 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
390 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
393 /* Amount EXIM_CLOCK is behind realtime, at startup. */
394 static struct timespec offset_ts;
397 exim_clock_init(void)
400 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
401 (void)gettimeofday(&tv, NULL);
402 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
403 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
404 if (offset_ts.tv_nsec >= 0) return;
406 offset_ts.tv_nsec += 1000*1000*1000;
412 exim_gettime(struct timeval * tv)
414 #ifdef _POSIX_MONOTONIC_CLOCK
415 struct timespec now_ts;
417 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
419 now_ts.tv_sec += offset_ts.tv_sec;
420 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
423 now_ts.tv_nsec -= 1000*1000*1000;
425 tv->tv_sec = now_ts.tv_sec;
426 tv->tv_usec = now_ts.tv_nsec / 1000;
430 (void)gettimeofday(tv, NULL);
434 /* Exim uses a time + a pid to generate a unique identifier in two places: its
435 message IDs, and in file names for maildir deliveries. Because some OS now
436 re-use pids within the same second, sub-second times are now being used.
437 However, for absolute certainty, we must ensure the clock has ticked before
438 allowing the relevant process to complete. At the time of implementation of
439 this code (February 2003), the speed of processors is such that the clock will
440 invariably have ticked already by the time a process has done its job. This
441 function prepares for the time when things are faster - and it also copes with
442 clocks that go backwards.
445 tgt_tv A timeval which was used to create uniqueness; its usec field
446 has been rounded down to the value of the resolution.
447 We want to be sure the current time is greater than this.
448 resolution The resolution that was used to divide the microseconds
449 (1 for maildir, larger for message ids)
455 exim_wait_tick(struct timeval * tgt_tv, int resolution)
457 struct timeval now_tv;
458 long int now_true_usec;
460 exim_gettime(&now_tv);
461 now_true_usec = now_tv.tv_usec;
462 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
464 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
466 struct itimerval itval;
467 itval.it_interval.tv_sec = 0;
468 itval.it_interval.tv_usec = 0;
469 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
470 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
472 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
473 negative value for the microseconds is possible only in the case when "now"
474 is more than a second less than "tgt". That means that itval.it_value.tv_sec
475 is greater than zero. The following correction is therefore safe. */
477 if (itval.it_value.tv_usec < 0)
479 itval.it_value.tv_usec += 1000000;
480 itval.it_value.tv_sec -= 1;
483 DEBUG(D_transport|D_receive)
485 if (!f.running_in_test_harness)
487 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
488 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
489 now_tv.tv_sec, (long) now_tv.tv_usec);
490 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
491 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
497 /* Be prapared to go around if the kernel does not implement subtick
498 granularity (GNU Hurd) */
500 (void)gettimeofday(&now_tv, NULL);
501 now_true_usec = now_tv.tv_usec;
502 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
509 /*************************************************
510 * Call fopen() with umask 777 and adjust mode *
511 *************************************************/
513 /* Exim runs with umask(0) so that files created with open() have the mode that
514 is specified in the open() call. However, there are some files, typically in
515 the spool directory, that are created with fopen(). They end up world-writeable
516 if no precautions are taken. Although the spool directory is not accessible to
517 the world, this is an untidiness. So this is a wrapper function for fopen()
518 that sorts out the mode of the created file.
521 filename the file name
522 options the fopen() options
523 mode the required mode
525 Returns: the fopened FILE or NULL
529 modefopen(const uschar *filename, const char *options, mode_t mode)
531 mode_t saved_umask = umask(0777);
532 FILE *f = Ufopen(filename, options);
533 (void)umask(saved_umask);
534 if (f != NULL) (void)fchmod(fileno(f), mode);
539 /*************************************************
540 * Ensure stdin, stdout, and stderr exist *
541 *************************************************/
543 /* Some operating systems grumble if an exec() happens without a standard
544 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
545 file will be opened and will use these fd values, and then some other bit of
546 code will assume, for example, that it can write error messages to stderr.
547 This function ensures that fds 0, 1, and 2 are open if they do not already
548 exist, by connecting them to /dev/null.
550 This function is also used to ensure that std{in,out,err} exist at all times,
551 so that if any library that Exim calls tries to use them, it doesn't crash.
562 for (int i = 0; i <= 2; i++)
564 if (fstat(i, &statbuf) < 0 && errno == EBADF)
566 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
567 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
568 string_open_failed(errno, "/dev/null", NULL));
569 if (devnull != i) (void)dup2(devnull, i);
572 if (devnull > 2) (void)close(devnull);
578 /*************************************************
579 * Close unwanted file descriptors for delivery *
580 *************************************************/
582 /* This function is called from a new process that has been forked to deliver
583 an incoming message, either directly, or using exec.
585 We want any smtp input streams to be closed in this new process. However, it
586 has been observed that using fclose() here causes trouble. When reading in -bS
587 input, duplicate copies of messages have been seen. The files will be sharing a
588 file pointer with the parent process, and it seems that fclose() (at least on
589 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
590 least sometimes. Hence we go for closing the underlying file descriptors.
592 If TLS is active, we want to shut down the TLS library, but without molesting
593 the parent's SSL connection.
595 For delivery of a non-SMTP message, we want to close stdin and stdout (and
596 stderr unless debugging) because the calling process might have set them up as
597 pipes and be waiting for them to close before it waits for the submission
598 process to terminate. If they aren't closed, they hold up the calling process
599 until the initial delivery process finishes, which is not what we want.
601 Exception: We do want it for synchronous delivery!
603 And notwithstanding all the above, if D_resolver is set, implying resolver
604 debugging, leave stdout open, because that's where the resolver writes its
607 When we close stderr (which implies we've also closed stdout), we also get rid
608 of any controlling terminal.
620 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
622 (void)close(fileno(smtp_in));
623 (void)close(fileno(smtp_out));
628 (void)close(0); /* stdin */
629 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
630 if (debug_selector == 0) /* stderr */
632 if (!f.synchronous_delivery)
645 /*************************************************
647 *************************************************/
649 /* This function sets a new uid and gid permanently, optionally calling
650 initgroups() to set auxiliary groups. There are some special cases when running
651 Exim in unprivileged modes. In these situations the effective uid will not be
652 root; if we already have the right effective uid/gid, and don't need to
653 initialize any groups, leave things as they are.
658 igflag TRUE if initgroups() wanted
659 msg text to use in debugging output and failure log
661 Returns: nothing; bombs out on failure
665 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
667 uid_t euid = geteuid();
668 gid_t egid = getegid();
670 if (euid == root_uid || euid != uid || egid != gid || igflag)
672 /* At least one OS returns +1 for initgroups failure, so just check for
677 struct passwd *pw = getpwuid(uid);
679 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
680 "no passwd entry for uid=%ld", (long int)uid);
682 if (initgroups(pw->pw_name, gid) != 0)
683 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
684 (long int)uid, strerror(errno));
687 if (setgid(gid) < 0 || setuid(uid) < 0)
688 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
689 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
692 /* Debugging output included uid/gid and all groups */
696 int group_count, save_errno;
697 gid_t group_list[EXIM_GROUPLIST_SIZE];
698 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
699 (long int)geteuid(), (long int)getegid(), (long int)getpid());
700 group_count = getgroups(nelem(group_list), group_list);
702 debug_printf(" auxiliary group list:");
704 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
705 else if (group_count < 0)
706 debug_printf(" <error: %s>", strerror(save_errno));
707 else debug_printf(" <none>");
715 /*************************************************
717 *************************************************/
719 /* Exim exits via this function so that it always clears up any open
725 Returns: does not return
734 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
735 ">>>>>>>>>>>>>>>>\n",
736 (int)getpid(), process_purpose, rc);
742 exim_underbar_exit(int rc)
746 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
747 ">>>>>>>>>>>>>>>>\n",
748 (int)getpid(), process_purpose, rc);
754 /* Print error string, then die */
756 exim_fail(const char * fmt, ...)
760 vfprintf(stderr, fmt, ap);
764 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
765 of chown()/fchown(). See src/functions.h for more explanation */
767 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
769 int saved_errno = errno; /* from the preceeding chown call */
771 log_write(0, LOG_MAIN|LOG_PANIC,
772 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
773 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
774 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
776 /* I leave this here, commented, in case the "bug"(?) comes up again.
777 It is not an Exim bug, but we can provide a workaround.
783 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
785 if (buf.st_uid == owner && buf.st_gid == group) return 0;
786 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
788 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
796 /*************************************************
797 * Extract port from host address *
798 *************************************************/
800 /* Called to extract the port from the values given to -oMa and -oMi.
801 It also checks the syntax of the address, and terminates it before the
802 port data when a port is extracted.
805 address the address, with possible port on the end
807 Returns: the port, or zero if there isn't one
808 bombs out on a syntax error
812 check_port(uschar *address)
814 int port = host_address_extract_port(address);
815 if (string_is_ip_address(address, NULL) == 0)
816 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
822 /*************************************************
823 * Test/verify an address *
824 *************************************************/
826 /* This function is called by the -bv and -bt code. It extracts a working
827 address from a full RFC 822 address. This isn't really necessary per se, but it
828 has the effect of collapsing source routes.
832 flags flag bits for verify_address()
833 exit_value to be set for failures
839 test_address(uschar *s, int flags, int *exit_value)
841 int start, end, domain;
842 uschar *parse_error = NULL;
843 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
847 fprintf(stdout, "syntax error: %s\n", parse_error);
852 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
853 -1, -1, NULL, NULL, NULL);
854 if (rc == FAIL) *exit_value = 2;
855 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
861 /*************************************************
862 * Show supported features *
863 *************************************************/
866 show_db_version(FILE * f)
868 #ifdef DB_VERSION_STRING
871 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
872 fprintf(f, " Runtime: %s\n",
873 db_version(NULL, NULL, NULL));
876 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
878 #elif defined(BTREEVERSION) && defined(HASHVERSION)
880 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
882 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
885 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
886 fprintf(f, "Probably ndbm\n");
887 #elif defined(USE_TDB)
888 fprintf(f, "Using tdb\n");
891 fprintf(f, "Probably GDBM (native mode)\n");
893 fprintf(f, "Probably GDBM (compatibility mode)\n");
899 /* This function is called for -bV/--version and for -d to output the optional
900 features of the current Exim binary.
902 Arguments: a FILE for printing
907 show_whats_supported(FILE * fp)
909 rmark reset_point = store_mark();
911 DEBUG(D_any) {} else show_db_version(fp);
913 g = string_cat(NULL, US"Support for:");
914 #ifdef SUPPORT_CRYPTEQ
915 g = string_cat(g, US" crypteq");
918 g = string_cat(g, US" iconv()");
921 g = string_cat(g, US" IPv6");
923 #ifdef HAVE_SETCLASSRESOURCES
924 g = string_cat(g, US" use_setclassresources");
927 g = string_cat(g, US" PAM");
930 g = string_cat(g, US" Perl");
933 g = string_cat(g, US" Expand_dlfunc");
935 #ifdef USE_TCP_WRAPPERS
936 g = string_cat(g, US" TCPwrappers");
939 g = string_cat(g, US" GnuTLS");
942 g = string_cat(g, US" OpenSSL");
944 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
945 g = string_cat(g, US" translate_ip_address");
947 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
948 g = string_cat(g, US" move_frozen_messages");
950 #ifdef WITH_CONTENT_SCAN
951 g = string_cat(g, US" Content_Scanning");
954 g = string_cat(g, US" DANE");
957 g = string_cat(g, US" DKIM");
959 #ifndef DISABLE_DNSSEC
960 g = string_cat(g, US" DNSSEC");
962 #ifndef DISABLE_EVENT
963 g = string_cat(g, US" Event");
966 g = string_cat(g, US" I18N");
969 g = string_cat(g, US" OCSP");
971 #ifndef DISABLE_PIPE_CONNECT
972 g = string_cat(g, US" PIPE_CONNECT");
975 g = string_cat(g, US" PRDR");
978 g = string_cat(g, US" PROXY");
981 g = string_cat(g, US" SOCKS");
984 g = string_cat(g, US" SPF");
987 g = string_cat(g, US" DMARC");
991 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
993 #ifdef EXPERIMENTAL_ARC
994 g = string_cat(g, US" Experimental_ARC");
996 #ifdef EXPERIMENTAL_BRIGHTMAIL
997 g = string_cat(g, US" Experimental_Brightmail");
999 #ifdef EXPERIMENTAL_DCC
1000 g = string_cat(g, US" Experimental_DCC");
1002 #ifdef EXPERIMENTAL_DSN_INFO
1003 g = string_cat(g, US" Experimental_DSN_info");
1005 #ifdef EXPERIMENTAL_LMDB
1006 g = string_cat(g, US" Experimental_LMDB");
1008 #ifdef EXPERIMENTAL_QUEUE_RAMP
1009 g = string_cat(g, US" Experimental_Queue_Ramp");
1011 #ifdef EXPERIMENTAL_QUEUEFILE
1012 g = string_cat(g, US" Experimental_QUEUEFILE");
1014 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1015 g = string_cat(g, US" Experimental_SRS");
1017 #ifdef EXPERIMENTAL_TLS_RESUME
1018 g = string_cat(g, US" Experimental_TLS_resume");
1020 g = string_cat(g, US"\n");
1022 g = string_cat(g, US"Lookups (built-in):");
1023 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1024 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1026 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1027 g = string_cat(g, US" cdb");
1029 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1030 g = string_cat(g, US" dbm dbmjz dbmnz");
1032 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1033 g = string_cat(g, US" dnsdb");
1035 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1036 g = string_cat(g, US" dsearch");
1038 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1039 g = string_cat(g, US" ibase");
1041 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1042 g = string_cat(g, US" json");
1044 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1045 g = string_cat(g, US" ldap ldapdn ldapm");
1047 #ifdef EXPERIMENTAL_LMDB
1048 g = string_cat(g, US" lmdb");
1050 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1051 g = string_cat(g, US" mysql");
1053 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1054 g = string_cat(g, US" nis nis0");
1056 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1057 g = string_cat(g, US" nisplus");
1059 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1060 g = string_cat(g, US" oracle");
1062 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1063 g = string_cat(g, US" passwd");
1065 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1066 g = string_cat(g, US" pgsql");
1068 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1069 g = string_cat(g, US" redis");
1071 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1072 g = string_cat(g, US" sqlite");
1074 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1075 g = string_cat(g, US" testdb");
1077 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1078 g = string_cat(g, US" whoson");
1080 g = string_cat(g, US"\n");
1082 g = auth_show_supported(g);
1083 g = route_show_supported(g);
1084 g = transport_show_supported(g);
1086 #ifdef WITH_CONTENT_SCAN
1087 g = malware_show_supported(g);
1090 if (fixed_never_users[0] > 0)
1093 g = string_cat(g, US"Fixed never_users: ");
1094 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1095 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1096 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1099 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1100 fputs(CS string_from_gstring(g), fp);
1102 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1104 /* Everything else is details which are only worth reporting when debugging.
1105 Perhaps the tls_version_report should move into this too. */
1108 /* clang defines __GNUC__ (at least, for me) so test for it first */
1109 #if defined(__clang__)
1110 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1111 #elif defined(__GNUC__)
1112 fprintf(fp, "Compiler: GCC [%s]\n",
1116 "? unknown version ?"
1120 fprintf(fp, "Compiler: <unknown>\n");
1123 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1124 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1125 __GLIBC__, __GLIBC_MINOR__);
1126 if (__GLIBC_PREREQ(2, 1))
1127 fprintf(fp, " Runtime: %s\n",
1128 gnu_get_libc_version());
1131 show_db_version(fp);
1134 tls_version_report(fp);
1137 utf8_version_report(fp);
1140 spf_lib_version_report(fp);
1143 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1144 if (authi->version_report)
1145 (*authi->version_report)(fp);
1147 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1148 characters; unless it's an ancient version of PCRE in which case it
1150 #ifndef PCRE_PRERELEASE
1151 # define PCRE_PRERELEASE
1154 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1155 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1157 PCRE_MAJOR, PCRE_MINOR,
1158 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1161 #undef EXPAND_AND_QUOTE
1164 for (int i = 0; i < lookup_list_count; i++)
1165 if (lookup_list[i]->version_report)
1166 lookup_list[i]->version_report(fp);
1168 #ifdef WHITELIST_D_MACROS
1169 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1171 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1173 #ifdef TRUSTED_CONFIG_LIST
1174 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1176 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1180 store_reset(reset_point);
1184 /*************************************************
1185 * Show auxiliary information about Exim *
1186 *************************************************/
1189 show_exim_information(enum commandline_info request, FILE *stream)
1194 fprintf(stream, "Oops, something went wrong.\n");
1198 "The -bI: flag takes a string indicating which information to provide.\n"
1199 "If the string is not recognised, you'll get this help (on stderr).\n"
1201 " exim -bI:help this information\n"
1202 " exim -bI:dscp list of known dscp value keywords\n"
1203 " exim -bI:sieve list of supported sieve extensions\n"
1207 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1208 fprintf(stream, "%s\n", *pp);
1211 dscp_list_to_stream(stream);
1217 /*************************************************
1218 * Quote a local part *
1219 *************************************************/
1221 /* This function is used when a sender address or a From: or Sender: header
1222 line is being created from the caller's login, or from an authenticated_id. It
1223 applies appropriate quoting rules for a local part.
1225 Argument: the local part
1226 Returns: the local part, quoted if necessary
1230 local_part_quote(uschar *lpart)
1232 BOOL needs_quote = FALSE;
1235 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1237 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1238 (*t != '.' || t == lpart || t[1] == 0);
1241 if (!needs_quote) return lpart;
1243 g = string_catn(NULL, US"\"", 1);
1247 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1250 g = string_cat(g, lpart);
1253 g = string_catn(g, lpart, nq - lpart);
1254 g = string_catn(g, US"\\", 1);
1255 g = string_catn(g, nq, 1);
1259 g = string_catn(g, US"\"", 1);
1260 return string_from_gstring(g);
1266 /*************************************************
1267 * Load readline() functions *
1268 *************************************************/
1270 /* This function is called from testing executions that read data from stdin,
1271 but only when running as the calling user. Currently, only -be does this. The
1272 function loads the readline() function library and passes back the functions.
1273 On some systems, it needs the curses library, so load that too, but try without
1274 it if loading fails. All this functionality has to be requested at build time.
1277 fn_readline_ptr pointer to where to put the readline pointer
1278 fn_addhist_ptr pointer to where to put the addhistory function
1280 Returns: the dlopen handle or NULL on failure
1284 set_readline(char * (**fn_readline_ptr)(const char *),
1285 void (**fn_addhist_ptr)(const char *))
1288 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1290 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1291 if (dlhandle_curses) dlclose(dlhandle_curses);
1295 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1296 * char * readline (const char *prompt);
1297 * void add_history (const char *string);
1299 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1300 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1303 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1311 /*************************************************
1312 * Get a line from stdin for testing things *
1313 *************************************************/
1315 /* This function is called when running tests that can take a number of lines
1316 of input (for example, -be and -bt). It handles continuations and trailing
1317 spaces. And prompting and a blank line output on eof. If readline() is in use,
1318 the arguments are non-NULL and provide the relevant functions.
1321 fn_readline readline function or NULL
1322 fn_addhist addhist function or NULL
1324 Returns: pointer to dynamic memory, or NULL at end of file
1328 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1332 if (!fn_readline) { printf("> "); fflush(stdout); }
1334 for (int i = 0;; i++)
1336 uschar buffer[1024];
1340 char *readline_line = NULL;
1343 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1344 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1345 p = US readline_line;
1350 /* readline() not in use */
1353 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1357 /* Handle the line */
1359 ss = p + (int)Ustrlen(p);
1360 while (ss > p && isspace(ss[-1])) ss--;
1363 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1365 g = string_catn(g, p, ss - p);
1368 if (fn_readline) free(readline_line);
1371 /* g can only be NULL if ss==p */
1372 if (ss == p || g->s[g->ptr-1] != '\\')
1376 (void) string_from_gstring(g);
1379 if (!g) printf("\n");
1380 return string_from_gstring(g);
1385 /*************************************************
1386 * Output usage information for the program *
1387 *************************************************/
1389 /* This function is called when there are no recipients
1390 or a specific --help argument was added.
1393 progname information on what name we were called by
1395 Returns: DOES NOT RETURN
1399 exim_usage(uschar *progname)
1402 /* Handle specific program invocation variants */
1403 if (Ustrcmp(progname, US"-mailq") == 0)
1405 "mailq - list the contents of the mail queue\n\n"
1406 "For a list of options, see the Exim documentation.\n");
1408 /* Generic usage - we output this whatever happens */
1410 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1411 "not directly from a shell command line. Options and/or arguments control\n"
1412 "what it does when called. For a list of options, see the Exim documentation.\n");
1417 /*************************************************
1418 * Validate that the macros given are okay *
1419 *************************************************/
1421 /* Typically, Exim will drop privileges if macros are supplied. In some
1422 cases, we want to not do so.
1424 Arguments: opt_D_used - true if the commandline had a "-D" option
1425 Returns: true if trusted, false otherwise
1429 macros_trusted(BOOL opt_D_used)
1431 #ifdef WHITELIST_D_MACROS
1432 uschar *whitelisted, *end, *p, **whites;
1433 int white_count, i, n;
1435 BOOL prev_char_item, found;
1440 #ifndef WHITELIST_D_MACROS
1444 /* We only trust -D overrides for some invoking users:
1445 root, the exim run-time user, the optional config owner user.
1446 I don't know why config-owner would be needed, but since they can own the
1447 config files anyway, there's no security risk to letting them override -D. */
1448 if ( ! ((real_uid == root_uid)
1449 || (real_uid == exim_uid)
1450 #ifdef CONFIGURE_OWNER
1451 || (real_uid == config_uid)
1455 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1459 /* Get a list of macros which are whitelisted */
1460 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1461 prev_char_item = FALSE;
1463 for (p = whitelisted; *p != '\0'; ++p)
1465 if (*p == ':' || isspace(*p))
1470 prev_char_item = FALSE;
1473 if (!prev_char_item)
1474 prev_char_item = TRUE;
1481 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1482 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1487 if (i == white_count)
1489 while (*p != '\0' && p < end)
1495 /* The list of commandline macros should be very short.
1496 Accept the N*M complexity. */
1497 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1500 for (uschar ** w = whites; *w; ++w)
1501 if (Ustrcmp(*w, m->name) == 0)
1508 if (!m->replacement)
1510 if ((len = m->replen) == 0)
1512 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1513 0, PCRE_EOPT, NULL, 0);
1516 if (n != PCRE_ERROR_NOMATCH)
1517 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1521 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1527 /*************************************************
1528 * Expansion testing *
1529 *************************************************/
1531 /* Expand and print one item, doing macro-processing.
1534 item line for expansion
1538 expansion_test_line(uschar * line)
1543 Ustrncpy(big_buffer, line, big_buffer_size);
1544 big_buffer[big_buffer_size-1] = '\0';
1545 len = Ustrlen(big_buffer);
1547 (void) macros_expand(0, &len, &dummy_macexp);
1549 if (isupper(big_buffer[0]))
1551 if (macro_read_assignment(big_buffer))
1552 printf("Defined macro '%s'\n", mlast->name);
1555 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1556 else printf("Failed: %s\n", expand_string_message);
1561 /*************************************************
1562 * Entry point and high-level code *
1563 *************************************************/
1565 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1566 the appropriate action. All the necessary functions are present in the one
1567 binary. I originally thought one should split it up, but it turns out that so
1568 much of the apparatus is needed in each chunk that one might as well just have
1569 it all available all the time, which then makes the coding easier as well.
1572 argc count of entries in argv
1573 argv argument strings, with argv[0] being the program name
1575 Returns: EXIT_SUCCESS if terminated successfully
1576 EXIT_FAILURE otherwise, except when a message has been sent
1577 to the sender, and -oee was given
1581 main(int argc, char **cargv)
1583 uschar **argv = USS cargv;
1584 int arg_receive_timeout = -1;
1585 int arg_smtp_receive_timeout = -1;
1586 int arg_error_handling = error_handling;
1587 int filter_sfd = -1;
1588 int filter_ufd = -1;
1591 int list_queue_option = 0;
1593 int msg_action_arg = -1;
1594 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1595 int queue_only_reason = 0;
1597 int perl_start_option = 0;
1599 int recipients_arg = argc;
1600 int sender_address_domain = 0;
1601 int test_retry_arg = -1;
1602 int test_rewrite_arg = -1;
1603 gid_t original_egid;
1604 BOOL arg_queue_only = FALSE;
1605 BOOL bi_option = FALSE;
1606 BOOL checking = FALSE;
1607 BOOL count_queue = FALSE;
1608 BOOL expansion_test = FALSE;
1609 BOOL extract_recipients = FALSE;
1610 BOOL flag_G = FALSE;
1611 BOOL flag_n = FALSE;
1612 BOOL forced_delivery = FALSE;
1613 BOOL f_end_dot = FALSE;
1614 BOOL deliver_give_up = FALSE;
1615 BOOL list_queue = FALSE;
1616 BOOL list_options = FALSE;
1617 BOOL list_config = FALSE;
1618 BOOL local_queue_only;
1620 BOOL one_msg_action = FALSE;
1621 BOOL opt_D_used = FALSE;
1622 BOOL queue_only_set = FALSE;
1623 BOOL receiving_message = TRUE;
1624 BOOL sender_ident_set = FALSE;
1625 BOOL session_local_queue_only;
1627 BOOL removed_privilege = FALSE;
1628 BOOL usage_wanted = FALSE;
1629 BOOL verify_address_mode = FALSE;
1630 BOOL verify_as_sender = FALSE;
1631 BOOL version_printed = FALSE;
1632 uschar *alias_arg = NULL;
1633 uschar *called_as = US"";
1634 uschar *cmdline_syslog_name = NULL;
1635 uschar *start_queue_run_id = NULL;
1636 uschar *stop_queue_run_id = NULL;
1637 uschar *expansion_test_message = NULL;
1638 uschar *ftest_domain = NULL;
1639 uschar *ftest_localpart = NULL;
1640 uschar *ftest_prefix = NULL;
1641 uschar *ftest_suffix = NULL;
1642 uschar *log_oneline = NULL;
1643 uschar *malware_test_file = NULL;
1644 uschar *real_sender_address;
1645 uschar *originator_home = US"/";
1649 struct stat statbuf;
1650 pid_t passed_qr_pid = (pid_t)0;
1651 int passed_qr_pipe = -1;
1652 gid_t group_list[EXIM_GROUPLIST_SIZE];
1654 /* For the -bI: flag */
1655 enum commandline_info info_flag = CMDINFO_NONE;
1656 BOOL info_stdout = FALSE;
1658 /* Possible options for -R and -S */
1660 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1662 /* Need to define this in case we need to change the environment in order
1663 to get rid of a bogus time zone. We have to make it char rather than uschar
1664 because some OS define it in /usr/include/unistd.h. */
1666 extern char **environ;
1668 #ifdef MEASURE_TIMING
1669 (void)gettimeofday(×tamp_startup, NULL);
1672 /* If the Exim user and/or group and/or the configuration file owner/group were
1673 defined by ref:name at build time, we must now find the actual uid/gid values.
1674 This is a feature to make the lives of binary distributors easier. */
1676 #ifdef EXIM_USERNAME
1677 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1680 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1682 /* If ref:name uses a number as the name, route_finduser() returns
1683 TRUE with exim_uid set and pw coerced to NULL. */
1685 exim_gid = pw->pw_gid;
1686 #ifndef EXIM_GROUPNAME
1689 "exim: ref:name should specify a usercode, not a group.\n"
1690 "exim: can't let you get away with it unless you also specify a group.\n");
1694 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1697 #ifdef EXIM_GROUPNAME
1698 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1699 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1702 #ifdef CONFIGURE_OWNERNAME
1703 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1704 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1705 CONFIGURE_OWNERNAME);
1708 /* We default the system_filter_user to be the Exim run-time user, as a
1709 sane non-root value. */
1710 system_filter_uid = exim_uid;
1712 #ifdef CONFIGURE_GROUPNAME
1713 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1714 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1715 CONFIGURE_GROUPNAME);
1718 /* In the Cygwin environment, some initialization used to need doing.
1719 It was fudged in by means of this macro; now no longer but we'll leave
1720 it in case of others. */
1726 /* Check a field which is patched when we are running Exim within its
1727 testing harness; do a fast initial check, and then the whole thing. */
1729 f.running_in_test_harness =
1730 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1731 if (f.running_in_test_harness)
1734 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1735 at the start of a program; however, it seems that some environments do not
1736 follow this. A "strange" locale can affect the formatting of timestamps, so we
1739 setlocale(LC_ALL, "C");
1741 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1743 #ifdef _POSIX_MONOTONIC_CLOCK
1747 /* Set up the default handler for timing using alarm(). */
1749 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1751 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1752 because store_malloc writes a log entry on failure. */
1754 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1755 exim_fail("exim: failed to get store for log buffer\n");
1757 /* Initialize the default log options. */
1759 bits_set(log_selector, log_selector_size, log_default);
1761 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1762 NULL when the daemon is run and the file is closed. We have to use this
1763 indirection, because some systems don't allow writing to the variable "stderr".
1766 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1768 /* Arrange for the PCRE regex library to use our store functions. Note that
1769 the normal calls are actually macros that add additional arguments for
1770 debugging purposes so we have to assign specially constructed functions here.
1771 The default is to use store in the stacking pool, but this is overridden in the
1772 regex_must_compile() function. */
1774 pcre_malloc = function_store_get;
1775 pcre_free = function_dummy_free;
1777 /* Ensure there is a big buffer for temporary use in several places. It is put
1778 in malloc store so that it can be freed for enlargement if necessary. */
1780 big_buffer = store_malloc(big_buffer_size);
1782 /* Set up the handler for the data request signal, and set the initial
1783 descriptive text. */
1785 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1786 set_process_info("initializing");
1787 os_restarting_signal(SIGUSR1, usr1_handler);
1789 /* If running in a dockerized environment, the TERM signal is only
1790 delegated to the PID 1 if we request it by setting an signal handler */
1791 if (getpid() == 1) signal(SIGTERM, term_handler);
1793 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1794 in the daemon code. For the rest of Exim's uses, we ignore it. */
1796 signal(SIGHUP, SIG_IGN);
1798 /* We don't want to die on pipe errors as the code is written to handle
1799 the write error instead. */
1801 signal(SIGPIPE, SIG_IGN);
1803 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1804 set to SIG_IGN. This causes subprocesses that complete before the parent
1805 process waits for them not to hang around, so when Exim calls wait(), nothing
1806 is there. The wait() code has been made robust against this, but let's ensure
1807 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1808 ending status. We use sigaction rather than plain signal() on those OS where
1809 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1810 problem on AIX with this.) */
1814 struct sigaction act;
1815 act.sa_handler = SIG_DFL;
1816 sigemptyset(&(act.sa_mask));
1818 sigaction(SIGCHLD, &act, NULL);
1821 signal(SIGCHLD, SIG_DFL);
1824 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1829 /* Set up the version number. Set up the leading 'E' for the external form of
1830 message ids, set the pointer to the internal form, and initialize it to
1831 indicate no message being processed. */
1834 message_id_option[0] = '-';
1835 message_id_external = message_id_option + 1;
1836 message_id_external[0] = 'E';
1837 message_id = message_id_external + 1;
1840 /* Set the umask to zero so that any files Exim creates using open() are
1841 created with the modes that it specifies. NOTE: Files created with fopen() have
1842 a problem, which was not recognized till rather late (February 2006). With this
1843 umask, such files will be world writeable. (They are all content scanning files
1844 in the spool directory, which isn't world-accessible, so this is not a
1845 disaster, but it's untidy.) I don't want to change this overall setting,
1846 however, because it will interact badly with the open() calls. Instead, there's
1847 now a function called modefopen() that fiddles with the umask while calling
1852 /* Precompile the regular expression for matching a message id. Keep this in
1853 step with the code that generates ids in the accept.c module. We need to do
1854 this here, because the -M options check their arguments for syntactic validity
1855 using mac_ismsgid, which uses this. */
1858 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1860 /* Precompile the regular expression that is used for matching an SMTP error
1861 code, possibly extended, at the start of an error message. Note that the
1862 terminating whitespace character is included. */
1865 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1868 #ifdef WHITELIST_D_MACROS
1869 /* Precompile the regular expression used to filter the content of macros
1870 given to -D for permissibility. */
1872 regex_whitelisted_macro =
1873 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1876 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1878 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1879 this seems to be a generally accepted convention, since one finds symbolic
1880 links called "mailq" in standard OS configurations. */
1882 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1883 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1886 receiving_message = FALSE;
1887 called_as = US"-mailq";
1890 /* If the program is called as "rmail" treat it as equivalent to
1891 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1892 i.e. preventing a single dot on a line from terminating the message, and
1893 returning with zero return code, even in cases of error (provided an error
1894 message has been sent). */
1896 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1897 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1900 called_as = US"-rmail";
1901 errors_sender_rc = EXIT_SUCCESS;
1904 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1905 this is a smail convention. */
1907 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1908 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1910 smtp_input = smtp_batched_input = TRUE;
1911 called_as = US"-rsmtp";
1914 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1915 this is a smail convention. */
1917 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1918 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1921 receiving_message = FALSE;
1922 called_as = US"-runq";
1925 /* If the program is called as "newaliases" treat it as equivalent to
1926 "exim -bi"; this is a sendmail convention. */
1928 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1929 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1932 receiving_message = FALSE;
1933 called_as = US"-newaliases";
1936 /* Save the original effective uid for a couple of uses later. It should
1937 normally be root, but in some esoteric environments it may not be. */
1939 original_euid = geteuid();
1940 original_egid = getegid();
1942 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1943 to be the same as the real ones. This makes a difference only if Exim is setuid
1944 (or setgid) to something other than root, which could be the case in some
1945 special configurations. */
1947 real_uid = getuid();
1948 real_gid = getgid();
1950 if (real_uid == root_uid)
1952 if ((rv = setgid(real_gid)))
1953 exim_fail("exim: setgid(%ld) failed: %s\n",
1954 (long int)real_gid, strerror(errno));
1955 if ((rv = setuid(real_uid)))
1956 exim_fail("exim: setuid(%ld) failed: %s\n",
1957 (long int)real_uid, strerror(errno));
1960 /* If neither the original real uid nor the original euid was root, Exim is
1961 running in an unprivileged state. */
1963 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1965 /* For most of the args-parsing we need to use permanent pool memory */
1967 int old_pool = store_pool;
1968 store_pool = POOL_PERM;
1970 /* Scan the program's arguments. Some can be dealt with right away; others are
1971 simply recorded for checking and handling afterwards. Do a high-level switch
1972 on the second character (the one after '-'), to save some effort. */
1974 for (i = 1; i < argc; i++)
1976 BOOL badarg = FALSE;
1977 uschar * arg = argv[i];
1981 /* An argument not starting with '-' is the start of a recipients list;
1982 break out of the options-scanning loop. */
1990 /* An option consisting of -- terminates the options */
1992 if (Ustrcmp(arg, "--") == 0)
1994 recipients_arg = i + 1;
1998 /* Handle flagged options */
2000 switchchar = arg[1];
2003 /* Make all -ex options synonymous with -oex arguments, since that
2004 is assumed by various callers. Also make -qR options synonymous with -R
2005 options, as that seems to be required as well. Allow for -qqR too, and
2006 the same for -S options. */
2008 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2009 Ustrncmp(arg+1, "qR", 2) == 0 ||
2010 Ustrncmp(arg+1, "qS", 2) == 0)
2012 switchchar = arg[2];
2015 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2017 switchchar = arg[3];
2019 f.queue_2stage = TRUE;
2022 /* Make -r synonymous with -f, since it is a documented alias */
2024 else if (arg[1] == 'r') switchchar = 'f';
2026 /* Make -ov synonymous with -v */
2028 else if (Ustrcmp(arg, "-ov") == 0)
2034 /* deal with --option_aliases */
2035 else if (switchchar == '-')
2037 if (Ustrcmp(argrest, "help") == 0)
2039 usage_wanted = TRUE;
2042 else if (Ustrcmp(argrest, "version") == 0)
2049 /* High-level switch on active initial letter */
2054 /* sendmail uses -Ac and -Am to control which .cf file is used;
2057 if (!*argrest) { badarg = TRUE; break; }
2060 BOOL ignore = FALSE;
2065 if (*(argrest + 1) == '\0')
2069 if (!ignore) badarg = TRUE;
2073 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2074 so has no need of it. */
2077 if (!*argrest) i++; /* Skip over the type */
2083 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2087 /* -bd: Run in daemon mode, awaiting SMTP connections.
2088 -bdf: Ditto, but in the foreground.
2091 f.daemon_listen = TRUE;
2092 if (*argrest == 'f') f.background_daemon = FALSE;
2093 else if (*argrest) badarg = TRUE;
2096 /* -be: Run in expansion test mode
2097 -bem: Ditto, but read a message from a file first
2100 expansion_test = checking = TRUE;
2101 if (*argrest == 'm')
2103 if (++i >= argc) { badarg = TRUE; break; }
2104 expansion_test_message = argv[i];
2107 if (*argrest) badarg = TRUE;
2110 /* -bF: Run system filter test */
2112 filter_test |= checking = FTEST_SYSTEM;
2113 if (*argrest) badarg = TRUE;
2114 else if (++i < argc) filter_test_sfile = argv[i];
2115 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2118 /* -bf: Run user filter test
2119 -bfd: Set domain for filter testing
2120 -bfl: Set local part for filter testing
2121 -bfp: Set prefix for filter testing
2122 -bfs: Set suffix for filter testing
2127 filter_test |= checking = FTEST_USER;
2128 if (++i < argc) filter_test_ufile = argv[i];
2129 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2134 exim_fail("exim: string expected after %s\n", arg);
2135 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2136 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2137 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2138 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2143 /* -bh: Host checking - an IP address must follow. */
2145 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2147 if (++i >= argc) { badarg = TRUE; break; }
2148 sender_host_address = string_copy_taint(argv[i], TRUE);
2149 host_checking = checking = f.log_testing_mode = TRUE;
2150 f.host_checking_callout = *argrest == 'c';
2151 message_logs = FALSE;
2156 /* -bi: This option is used by sendmail to initialize *the* alias file,
2157 though it has the -oA option to specify a different file. Exim has no
2158 concept of *the* alias file, but since Sun's YP make script calls
2159 sendmail this way, some support must be provided. */
2161 if (!*argrest) bi_option = TRUE;
2165 /* -bI: provide information, of the type to follow after a colon.
2166 This is an Exim flag. */
2168 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2170 uschar *p = argrest+1;
2171 info_flag = CMDINFO_HELP;
2173 if (strcmpic(p, CUS"sieve") == 0)
2175 info_flag = CMDINFO_SIEVE;
2178 else if (strcmpic(p, CUS"dscp") == 0)
2180 info_flag = CMDINFO_DSCP;
2183 else if (strcmpic(p, CUS"help") == 0)
2189 /* -bm: Accept and deliver message - the default option. Reinstate
2190 receiving_message, which got turned off for all -b options.
2191 -bmalware: test the filename given for malware */
2193 if (!*argrest) receiving_message = TRUE;
2194 else if (Ustrcmp(argrest, "alware") == 0)
2196 if (++i >= argc) { badarg = TRUE; break; }
2198 malware_test_file = argv[i];
2203 /* -bnq: For locally originating messages, do not qualify unqualified
2204 addresses. In the envelope, this causes errors; in header lines they
2207 if (Ustrcmp(argrest, "q") == 0)
2209 f.allow_unqualified_sender = FALSE;
2210 f.allow_unqualified_recipient = FALSE;
2215 /* -bpxx: List the contents of the mail queue, in various forms. If
2216 the option is -bpc, just a queue count is needed. Otherwise, if the
2217 first letter after p is r, then order is random. */
2219 if (*argrest == 'c')
2222 if (*++argrest) badarg = TRUE;
2226 if (*argrest == 'r')
2228 list_queue_option = 8;
2231 else list_queue_option = 0;
2235 /* -bp: List the contents of the mail queue, top-level only */
2239 /* -bpu: List the contents of the mail queue, top-level undelivered */
2241 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2243 /* -bpa: List the contents of the mail queue, including all delivered */
2245 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2247 /* Unknown after -bp[r] */
2253 /* -bP: List the configuration variables given as the address list.
2254 Force -v, so configuration errors get displayed. */
2257 /* -bP config: we need to setup here, because later,
2258 * when list_options is checked, the config is read already */
2261 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2264 readconf_save_config(version_string);
2268 list_options = TRUE;
2269 debug_selector |= D_v;
2270 debug_file = stderr;
2274 /* -brt: Test retry configuration lookup */
2276 if (Ustrcmp(argrest, "t") == 0)
2279 test_retry_arg = i + 1;
2283 /* -brw: Test rewrite configuration */
2285 else if (Ustrcmp(argrest, "w") == 0)
2288 test_rewrite_arg = i + 1;
2294 /* -bS: Read SMTP commands on standard input, but produce no replies -
2295 all errors are reported by sending messages. */
2298 smtp_input = smtp_batched_input = receiving_message = TRUE;
2302 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2303 on standard output. */
2305 if (!*argrest) smtp_input = receiving_message = TRUE;
2309 /* -bt: address testing mode */
2312 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2316 /* -bv: verify addresses */
2319 verify_address_mode = checking = f.log_testing_mode = TRUE;
2321 /* -bvs: verify sender addresses */
2323 else if (Ustrcmp(argrest, "s") == 0)
2325 verify_address_mode = checking = f.log_testing_mode = TRUE;
2326 verify_as_sender = TRUE;
2331 /* -bV: Print version string and support details */
2335 printf("Exim version %s #%s built %s\n", version_string,
2336 version_cnumber, version_date);
2337 printf("%s\n", CS version_copyright);
2338 version_printed = TRUE;
2339 show_whats_supported(stdout);
2340 f.log_testing_mode = TRUE;
2345 /* -bw: inetd wait mode, accept a listening socket as stdin */
2347 f.inetd_wait_mode = TRUE;
2348 f.background_daemon = FALSE;
2349 f.daemon_listen = TRUE;
2351 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2352 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2363 /* -C: change configuration file list; ignore if it isn't really
2364 a change! Enforce a prefix check if required. */
2368 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2369 if (Ustrcmp(config_main_filelist, argrest) != 0)
2371 #ifdef ALT_CONFIG_PREFIX
2373 int len = Ustrlen(ALT_CONFIG_PREFIX);
2374 const uschar *list = argrest;
2376 while((filename = string_nextinlist(&list, &sep, big_buffer,
2378 if ( ( Ustrlen(filename) < len
2379 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2380 || Ustrstr(filename, "/../") != NULL
2382 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2384 exim_fail("-C Permission denied\n");
2386 if (real_uid != root_uid)
2388 #ifdef TRUSTED_CONFIG_LIST
2390 if (real_uid != exim_uid
2391 #ifdef CONFIGURE_OWNER
2392 && real_uid != config_uid
2395 f.trusted_config = FALSE;
2398 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2401 struct stat statbuf;
2403 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2404 (statbuf.st_uid != root_uid /* owner not root */
2405 #ifdef CONFIGURE_OWNER
2406 && statbuf.st_uid != config_uid /* owner not the special one */
2409 (statbuf.st_gid != root_gid /* group not root */
2410 #ifdef CONFIGURE_GROUP
2411 && statbuf.st_gid != config_gid /* group not the special one */
2413 && (statbuf.st_mode & 020) != 0 /* group writeable */
2415 (statbuf.st_mode & 2) != 0) /* world writeable */
2417 f.trusted_config = FALSE;
2422 /* Well, the trust list at least is up to scratch... */
2424 uschar *trusted_configs[32];
2427 int old_pool = store_pool;
2428 store_pool = POOL_MAIN;
2430 reset_point = store_mark();
2431 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2433 uschar *start = big_buffer, *nl;
2434 while (*start && isspace(*start))
2438 nl = Ustrchr(start, '\n');
2441 trusted_configs[nr_configs++] = string_copy(start);
2442 if (nr_configs == nelem(trusted_configs))
2450 const uschar *list = argrest;
2452 while (f.trusted_config && (filename = string_nextinlist(&list,
2453 &sep, big_buffer, big_buffer_size)))
2455 for (i=0; i < nr_configs; i++)
2456 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2458 if (i == nr_configs)
2460 f.trusted_config = FALSE;
2465 else /* No valid prefixes found in trust_list file. */
2466 f.trusted_config = FALSE;
2467 store_reset(reset_point);
2468 store_pool = old_pool;
2471 else /* Could not open trust_list file. */
2472 f.trusted_config = FALSE;
2475 /* Not root; don't trust config */
2476 f.trusted_config = FALSE;
2480 config_main_filelist = argrest;
2481 f.config_changed = TRUE;
2486 /* -D: set up a macro definition */
2489 #ifdef DISABLE_D_OPTION
2490 exim_fail("exim: -D is not available in this Exim binary\n");
2496 uschar *s = argrest;
2499 while (isspace(*s)) s++;
2501 if (*s < 'A' || *s > 'Z')
2502 exim_fail("exim: macro name set by -D must start with "
2503 "an upper case letter\n");
2505 while (isalnum(*s) || *s == '_')
2507 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2511 if (ptr == 0) { badarg = TRUE; break; }
2512 while (isspace(*s)) s++;
2515 if (*s++ != '=') { badarg = TRUE; break; }
2516 while (isspace(*s)) s++;
2519 for (m = macros_user; m; m = m->next)
2520 if (Ustrcmp(m->name, name) == 0)
2521 exim_fail("exim: duplicated -D in command line\n");
2523 m = macro_create(name, s, TRUE);
2525 if (clmacro_count >= MAX_CLMACROS)
2526 exim_fail("exim: too many -D options on command line\n");
2527 clmacros[clmacro_count++] =
2528 string_sprintf("-D%s=%s", m->name, m->replacement);
2533 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2534 The latter is now a no-op, retained for compatibility only. If -dd is used,
2535 debugging subprocesses of the daemon is disabled. */
2538 if (Ustrcmp(argrest, "ropcr") == 0)
2540 /* drop_cr = TRUE; */
2543 /* Use an intermediate variable so that we don't set debugging while
2544 decoding the debugging bits. */
2548 unsigned int selector = D_default;
2551 if (*argrest == 'd')
2553 f.debug_daemon = TRUE;
2557 decode_bits(&selector, 1, debug_notall, argrest,
2558 debug_options, debug_options_count, US"debug", 0);
2559 debug_selector = selector;
2564 /* -E: This is a local error message. This option is not intended for
2565 external use at all, but is not restricted to trusted callers because it
2566 does no harm (just suppresses certain error messages) and if Exim is run
2567 not setuid root it won't always be trusted when it generates error
2568 messages using this option. If there is a message id following -E, point
2569 message_reference at it, for logging. */
2572 f.local_error_message = TRUE;
2573 if (mac_ismsgid(argrest)) message_reference = argrest;
2577 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2578 option, so it looks as if historically the -oex options are also callable
2579 without the leading -o. So we have to accept them. Before the switch,
2580 anything starting -oe has been converted to -e. Exim does not support all
2581 of the sendmail error options. */
2584 if (Ustrcmp(argrest, "e") == 0)
2586 arg_error_handling = ERRORS_SENDER;
2587 errors_sender_rc = EXIT_SUCCESS;
2589 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2590 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2591 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2592 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2597 /* -F: Set sender's full name, used instead of the gecos entry from
2598 the password file. Since users can usually alter their gecos entries,
2599 there's no security involved in using this instead. The data can follow
2600 the -F or be in the next argument. */
2604 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2605 originator_name = string_copy_taint(argrest, TRUE);
2606 f.sender_name_forced = TRUE;
2610 /* -f: Set sender's address - this value is only actually used if Exim is
2611 run by a trusted user, or if untrusted_set_sender is set and matches the
2612 address, except that the null address can always be set by any user. The
2613 test for this happens later, when the value given here is ignored when not
2614 permitted. For an untrusted user, the actual sender is still put in Sender:
2615 if it doesn't match the From: header (unless no_local_from_check is set).
2616 The data can follow the -f or be in the next argument. The -r switch is an
2617 obsolete form of -f but since there appear to be programs out there that
2618 use anything that sendmail has ever supported, better accept it - the
2619 synonymizing is done before the switch above.
2621 At this stage, we must allow domain literal addresses, because we don't
2622 know what the setting of allow_domain_literals is yet. Ditto for trailing
2623 dots and strip_trailing_dot. */
2627 int dummy_start, dummy_end;
2630 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2632 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2635 uschar * temp = argrest + Ustrlen(argrest) - 1;
2636 while (temp >= argrest && isspace(*temp)) temp--;
2637 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2638 allow_domain_literals = TRUE;
2639 strip_trailing_dot = TRUE;
2641 allow_utf8_domains = TRUE;
2643 if (!(sender_address = parse_extract_address(argrest, &errmess,
2644 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2645 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2647 sender_address = string_copy_taint(sender_address, TRUE);
2649 message_smtputf8 = string_is_utf8(sender_address);
2650 allow_utf8_domains = FALSE;
2652 allow_domain_literals = FALSE;
2653 strip_trailing_dot = FALSE;
2655 f.sender_address_forced = TRUE;
2659 /* -G: sendmail invocation to specify that it's a gateway submission and
2660 sendmail may complain about problems instead of fixing them.
2661 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2662 not at this time complain about problems. */
2668 /* -h: Set the hop count for an incoming message. Exim does not currently
2669 support this; it always computes it by counting the Received: headers.
2670 To put it in will require a change to the spool header file format. */
2674 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2675 if (!isdigit(*argrest)) badarg = TRUE;
2679 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2680 not to be documented for sendmail but mailx (at least) uses it) */
2683 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2687 /* -L: set the identifier used for syslog; equivalent to setting
2688 syslog_processname in the config file, but needs to be an admin option. */
2692 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2693 if ((sz = Ustrlen(argrest)) > 32)
2694 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2696 exim_fail("exim: the -L syslog name is too short\n");
2697 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2701 receiving_message = FALSE;
2703 /* -MC: continue delivery of another message via an existing open
2704 file descriptor. This option is used for an internal call by the
2705 smtp transport when there is a pending message waiting to go to an
2706 address to which it has got a connection. Five subsequent arguments are
2707 required: transport name, host name, IP address, sequence number, and
2708 message_id. Transports may decline to create new processes if the sequence
2709 number gets too big. The channel is stdin. This (-MC) must be the last
2710 argument. There's a subsequent check that the real-uid is privileged.
2712 If we are running in the test harness. delay for a bit, to let the process
2713 that set this one up complete. This makes for repeatability of the logging,
2716 if (Ustrcmp(argrest, "C") == 0)
2718 union sockaddr_46 interface_sock;
2719 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2722 exim_fail("exim: too many or too few arguments after -MC\n");
2724 if (msg_action_arg >= 0)
2725 exim_fail("exim: incompatible arguments\n");
2727 continue_transport = string_copy_taint(argv[++i], TRUE);
2728 continue_hostname = string_copy_taint(argv[++i], TRUE);
2729 continue_host_address = string_copy_taint(argv[++i], TRUE);
2730 continue_sequence = Uatoi(argv[++i]);
2731 msg_action = MSG_DELIVER;
2732 msg_action_arg = ++i;
2733 forced_delivery = TRUE;
2734 queue_run_pid = passed_qr_pid;
2735 queue_run_pipe = passed_qr_pipe;
2737 if (!mac_ismsgid(argv[i]))
2738 exim_fail("exim: malformed message id %s after -MC option\n",
2741 /* Set up $sending_ip_address and $sending_port, unless proxied */
2743 if (!continue_proxy_cipher)
2744 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2746 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2749 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2752 testharness_pause_ms(500);
2756 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2760 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2761 precedes -MC (see above). The flag indicates that the host to which
2762 Exim is connected has accepted an AUTH sequence. */
2764 case 'A': f.smtp_authenticated = TRUE; break;
2766 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2767 that exim is connected to supports the esmtp extension DSN */
2769 case 'D': smtp_peer_options |= OPTION_DSN; break;
2771 /* -MCd: for debug, set a process-purpose string */
2773 case 'd': if (++i < argc)
2774 process_purpose = string_copy_taint(argv[i], TRUE);
2778 /* -MCG: set the queue name, to a non-default value */
2780 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2784 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2786 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2788 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2789 it preceded -MC (see above) */
2791 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2793 /* -MCQ: pass on the pid of the queue-running process that started
2794 this chain of deliveries and the fd of its synchronizing pipe; this
2795 is useful only when it precedes -MC (see above) */
2797 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2799 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2803 /* -MCS: set the smtp_use_size flag; this is useful only when it
2804 precedes -MC (see above) */
2806 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2809 /* -MCs: used with -MCt; SNI was sent */
2810 /* -MCr: ditto, DANE */
2813 case 's': if (++i < argc)
2815 continue_proxy_sni = string_copy_taint(argv[i], TRUE);
2816 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2821 /* -MCt: similar to -MCT below but the connection is still open
2822 via a proxy process which handles the TLS context and coding.
2823 Require three arguments for the proxied local address and port,
2824 and the TLS cipher. */
2826 case 't': if (++i < argc)
2827 sending_ip_address = string_copy_taint(argv[i], TRUE);
2830 sending_port = (int)(Uatol(argv[i]));
2833 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2837 /* -MCT: set the tls_offered flag; this is useful only when it
2838 precedes -MC (see above). The flag indicates that the host to which
2839 Exim is connected has offered TLS support. */
2841 case 'T': smtp_peer_options |= OPTION_TLS; break;
2844 default: badarg = TRUE; break;
2849 /* -M[x]: various operations on the following list of message ids:
2850 -M deliver the messages, ignoring next retry times and thawing
2851 -Mc deliver the messages, checking next retry times, no thawing
2852 -Mf freeze the messages
2853 -Mg give up on the messages
2854 -Mt thaw the messages
2855 -Mrm remove the messages
2856 In the above cases, this must be the last option. There are also the
2857 following options which are followed by a single message id, and which
2858 act on that message. Some of them use the "recipient" addresses as well.
2859 -Mar add recipient(s)
2860 -Mmad mark all recipients delivered
2861 -Mmd mark recipients(s) delivered
2863 -Mset load a message for use with -be
2865 -Mvc show copy (of whole message, in RFC 2822 format)
2872 msg_action = MSG_DELIVER;
2873 forced_delivery = f.deliver_force_thaw = TRUE;
2875 else if (Ustrcmp(argrest, "ar") == 0)
2877 msg_action = MSG_ADD_RECIPIENT;
2878 one_msg_action = TRUE;
2880 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2881 else if (Ustrcmp(argrest, "es") == 0)
2883 msg_action = MSG_EDIT_SENDER;
2884 one_msg_action = TRUE;
2886 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2887 else if (Ustrcmp(argrest, "g") == 0)
2889 msg_action = MSG_DELIVER;
2890 deliver_give_up = TRUE;
2892 else if (Ustrcmp(argrest, "G") == 0)
2894 msg_action = MSG_SETQUEUE;
2895 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2897 else if (Ustrcmp(argrest, "mad") == 0)
2899 msg_action = MSG_MARK_ALL_DELIVERED;
2901 else if (Ustrcmp(argrest, "md") == 0)
2903 msg_action = MSG_MARK_DELIVERED;
2904 one_msg_action = TRUE;
2906 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2907 else if (Ustrcmp(argrest, "set") == 0)
2909 msg_action = MSG_LOAD;
2910 one_msg_action = TRUE;
2912 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2913 else if (Ustrcmp(argrest, "vb") == 0)
2915 msg_action = MSG_SHOW_BODY;
2916 one_msg_action = TRUE;
2918 else if (Ustrcmp(argrest, "vc") == 0)
2920 msg_action = MSG_SHOW_COPY;
2921 one_msg_action = TRUE;
2923 else if (Ustrcmp(argrest, "vh") == 0)
2925 msg_action = MSG_SHOW_HEADER;
2926 one_msg_action = TRUE;
2928 else if (Ustrcmp(argrest, "vl") == 0)
2930 msg_action = MSG_SHOW_LOG;
2931 one_msg_action = TRUE;
2933 else { badarg = TRUE; break; }
2935 /* All the -Mxx options require at least one message id. */
2937 msg_action_arg = i + 1;
2938 if (msg_action_arg >= argc)
2939 exim_fail("exim: no message ids given after %s option\n", arg);
2941 /* Some require only message ids to follow */
2943 if (!one_msg_action)
2945 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2946 exim_fail("exim: malformed message id %s after %s option\n",
2948 goto END_ARG; /* Remaining args are ids */
2951 /* Others require only one message id, possibly followed by addresses,
2952 which will be handled as normal arguments. */
2956 if (!mac_ismsgid(argv[msg_action_arg]))
2957 exim_fail("exim: malformed message id %s after %s option\n",
2958 argv[msg_action_arg], arg);
2964 /* Some programs seem to call the -om option without the leading o;
2965 for sendmail it askes for "me too". Exim always does this. */
2968 if (*argrest) badarg = TRUE;
2972 /* -N: don't do delivery - a debugging option that stops transports doing
2973 their thing. It implies debugging at the D_v level. */
2978 f.dont_deliver = TRUE;
2979 debug_selector |= D_v;
2980 debug_file = stderr;
2986 /* -n: This means "don't alias" in sendmail, apparently.
2987 For normal invocations, it has no effect.
2988 It may affect some other options. */
2994 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2995 option to the specified value. This form uses long names. We need to handle
2996 -O option=value and -Ooption=value. */
3001 exim_fail("exim: string expected after -O\n");
3007 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3010 if (!*(alias_arg = argrest))
3011 if (i+1 < argc) alias_arg = argv[++i];
3012 else exim_fail("exim: string expected after -oA\n");
3015 /* -oB: Set a connection message max value for remote deliveries */
3018 uschar * p = argrest;
3020 if (i+1 < argc && isdigit((argv[i+1][0])))
3024 connection_max_messages = 1;
3031 exim_fail("exim: number expected after -oB\n");
3032 connection_max_messages = Uatoi(p);
3037 /* -odb: background delivery */
3040 if (Ustrcmp(argrest, "b") == 0)
3042 f.synchronous_delivery = FALSE;
3043 arg_queue_only = FALSE;
3044 queue_only_set = TRUE;
3047 /* -odd: testsuite-only: add no inter-process delays */
3049 else if (Ustrcmp(argrest, "d") == 0)
3050 f.testsuite_delays = FALSE;
3052 /* -odf: foreground delivery (smail-compatible option); same effect as
3053 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3056 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3058 f.synchronous_delivery = TRUE;
3059 arg_queue_only = FALSE;
3060 queue_only_set = TRUE;
3063 /* -odq: queue only */
3065 else if (Ustrcmp(argrest, "q") == 0)
3067 f.synchronous_delivery = FALSE;
3068 arg_queue_only = TRUE;
3069 queue_only_set = TRUE;
3072 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3073 but no remote delivery */
3075 else if (Ustrcmp(argrest, "qs") == 0)
3077 f.queue_smtp = TRUE;
3078 arg_queue_only = FALSE;
3079 queue_only_set = TRUE;
3084 /* -oex: Sendmail error flags. As these are also accepted without the
3085 leading -o prefix, for compatibility with vacation and other callers,
3086 they are handled with -e above. */
3088 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3089 -oitrue: Another sendmail syntax for the same */
3092 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3097 /* -oM*: Set various characteristics for an incoming message; actually
3098 acted on for trusted callers only. */
3103 exim_fail("exim: data expected after -oM%s\n", argrest);
3105 /* -oMa: Set sender host address */
3107 if (Ustrcmp(argrest, "a") == 0)
3108 sender_host_address = string_copy_taint(argv[++i], TRUE);
3110 /* -oMaa: Set authenticator name */
3112 else if (Ustrcmp(argrest, "aa") == 0)
3113 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3115 /* -oMas: setting authenticated sender */
3117 else if (Ustrcmp(argrest, "as") == 0)
3118 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3120 /* -oMai: setting authenticated id */
3122 else if (Ustrcmp(argrest, "ai") == 0)
3123 authenticated_id = string_copy_taint(argv[++i], TRUE);
3125 /* -oMi: Set incoming interface address */
3127 else if (Ustrcmp(argrest, "i") == 0)
3128 interface_address = string_copy_taint(argv[++i], TRUE);
3130 /* -oMm: Message reference */
3132 else if (Ustrcmp(argrest, "m") == 0)
3134 if (!mac_ismsgid(argv[i+1]))
3135 exim_fail("-oMm must be a valid message ID\n");
3136 if (!f.trusted_config)
3137 exim_fail("-oMm must be called by a trusted user/config\n");
3138 message_reference = argv[++i];
3141 /* -oMr: Received protocol */
3143 else if (Ustrcmp(argrest, "r") == 0)
3145 if (received_protocol)
3146 exim_fail("received_protocol is set already\n");
3148 received_protocol = string_copy_taint(argv[++i], TRUE);
3150 /* -oMs: Set sender host name */
3152 else if (Ustrcmp(argrest, "s") == 0)
3153 sender_host_name = string_copy_taint(argv[++i], TRUE);
3155 /* -oMt: Set sender ident */
3157 else if (Ustrcmp(argrest, "t") == 0)
3159 sender_ident_set = TRUE;
3160 sender_ident = string_copy_taint(argv[++i], TRUE);
3163 /* Else a bad argument */
3170 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3171 seem to call this as -m (undocumented), so that is also accepted (see
3173 /* -oo: An ancient flag for old-style addresses which still seems to
3174 crop up in some calls (see in SCO). */
3178 if (*argrest) badarg = TRUE;
3181 /* -oP <name>: set pid file path for daemon
3182 -oPX: delete pid file of daemon */
3185 if (!*argrest) override_pid_file_path = argv[++i];
3186 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3191 /* -or <n>: set timeout for non-SMTP acceptance
3192 -os <n>: set timeout for SMTP acceptance */
3197 int * tp = argrest[-1] == 'r'
3198 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3200 *tp = readconf_readtime(argrest, 0, FALSE);
3201 else if (i+1 < argc)
3202 *tp = readconf_readtime(argv[++i], 0, FALSE);
3205 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3209 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3212 if (*argrest) badarg = TRUE;
3213 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3216 /* Unknown -o argument */
3224 /* -ps: force Perl startup; -pd force delayed Perl startup */
3228 if (*argrest == 's' && argrest[1] == 0)
3230 perl_start_option = 1;
3233 if (*argrest == 'd' && argrest[1] == 0)
3235 perl_start_option = -1;
3240 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3241 which sets the host protocol and host name */
3244 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3248 uschar * hn = Ustrchr(argrest, ':');
3250 if (received_protocol)
3251 exim_fail("received_protocol is set already\n");
3254 received_protocol = string_copy_taint(argrest, TRUE);
3257 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3258 sender_host_name = string_copy_taint(hn + 1, TRUE);
3265 receiving_message = FALSE;
3266 if (queue_interval >= 0)
3267 exim_fail("exim: -q specified more than once\n");
3269 /* -qq...: Do queue runs in a 2-stage manner */
3271 if (*argrest == 'q')
3273 f.queue_2stage = TRUE;
3277 /* -qi...: Do only first (initial) deliveries */
3279 if (*argrest == 'i')
3281 f.queue_run_first_delivery = TRUE;
3285 /* -qf...: Run the queue, forcing deliveries
3286 -qff..: Ditto, forcing thawing as well */
3288 if (*argrest == 'f')
3290 f.queue_run_force = TRUE;
3291 if (*++argrest == 'f')
3293 f.deliver_force_thaw = TRUE;
3298 /* -q[f][f]l...: Run the queue only on local deliveries */
3300 if (*argrest == 'l')
3302 f.queue_run_local = TRUE;
3306 /* -q[f][f][l][G<name>]... Work on the named queue */
3308 if (*argrest == 'G')
3311 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3312 queue_name = string_copyn(argrest, i);
3314 if (*argrest == '/') argrest++;
3317 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3318 only, optionally named, optionally starting from a given message id. */
3320 if (!(list_queue || count_queue))
3322 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3325 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3326 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3327 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3328 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3331 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3332 forced, optionally local only, optionally named. */
3334 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3336 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3340 case 'R': /* Synonymous with -qR... */
3341 receiving_message = FALSE;
3343 /* -Rf: As -R (below) but force all deliveries,
3344 -Rff: Ditto, but also thaw all frozen messages,
3345 -Rr: String is regex
3346 -Rrf: Regex and force
3347 -Rrff: Regex and force and thaw
3349 in all cases provided there are no further characters in this
3353 for (int i = 0; i < nelem(rsopts); i++)
3354 if (Ustrcmp(argrest, rsopts[i]) == 0)
3356 if (i != 2) f.queue_run_force = TRUE;
3357 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3358 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3359 argrest += Ustrlen(rsopts[i]);
3362 /* -R: Set string to match in addresses for forced queue run to
3363 pick out particular messages. */
3366 deliver_selectstring = string_copy_taint(argrest, TRUE);
3367 else if (i+1 < argc)
3368 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3370 exim_fail("exim: string expected after -R\n");
3374 /* -r: an obsolete synonym for -f (see above) */
3377 /* -S: Like -R but works on sender. */
3379 case 'S': /* Synonymous with -qS... */
3380 receiving_message = FALSE;
3382 /* -Sf: As -S (below) but force all deliveries,
3383 -Sff: Ditto, but also thaw all frozen messages,
3384 -Sr: String is regex
3385 -Srf: Regex and force
3386 -Srff: Regex and force and thaw
3388 in all cases provided there are no further characters in this
3392 for (int i = 0; i < nelem(rsopts); i++)
3393 if (Ustrcmp(argrest, rsopts[i]) == 0)
3395 if (i != 2) f.queue_run_force = TRUE;
3396 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3397 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3398 argrest += Ustrlen(rsopts[i]);
3401 /* -S: Set string to match in addresses for forced queue run to
3402 pick out particular messages. */
3405 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3406 else if (i+1 < argc)
3407 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3409 exim_fail("exim: string expected after -S\n");
3412 /* -Tqt is an option that is exclusively for use by the testing suite.
3413 It is not recognized in other circumstances. It allows for the setting up
3414 of explicit "queue times" so that various warning/retry things can be
3415 tested. Otherwise variability of clock ticks etc. cause problems. */
3418 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3419 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3424 /* -t: Set flag to extract recipients from body of message. */
3427 if (!*argrest) extract_recipients = TRUE;
3429 /* -ti: Set flag to extract recipients from body of message, and also
3430 specify that dot does not end the message. */
3432 else if (Ustrcmp(argrest, "i") == 0)
3434 extract_recipients = TRUE;
3438 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3441 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3448 /* -U: This means "initial user submission" in sendmail, apparently. The
3449 doc claims that in future sendmail may refuse syntactically invalid
3450 messages instead of fixing them. For the moment, we just ignore it. */
3456 /* -v: verify things - this is a very low-level debugging */
3461 debug_selector |= D_v;
3462 debug_file = stderr;
3468 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3470 The -x flag tells the sendmail command that mail from a local
3471 mail program has National Language Support (NLS) extended characters
3472 in the body of the mail item. The sendmail command can send mail with
3473 extended NLS characters across networks that normally corrupts these
3476 As Exim is 8-bit clean, it just ignores this flag. */
3479 if (*argrest) badarg = TRUE;
3482 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3483 logs to that file. We swallow the parameter and otherwise ignore it. */
3488 exim_fail("exim: string expected after -X\n");
3494 log_oneline = string_copy_taint(argv[i], TRUE);
3496 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3499 /* All other initial characters are errors */
3504 } /* End of high-level switch statement */
3506 /* Failed to recognize the option, or syntax error */
3509 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3510 "option %s\n", arg);
3514 /* If -R or -S have been specified without -q, assume a single queue run. */
3516 if ( (deliver_selectstring || deliver_selectstring_sender)
3517 && queue_interval < 0)
3522 store_pool = old_pool;
3525 /* If usage_wanted is set we call the usage function - which never returns */
3526 if (usage_wanted) exim_usage(called_as);
3528 /* Arguments have been processed. Check for incompatibilities. */
3530 (smtp_input || extract_recipients || recipients_arg < argc) &&
3531 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3532 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3533 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3536 msg_action_arg > 0 &&
3537 (f.daemon_listen || queue_interval > 0 || list_options ||
3538 (checking && msg_action != MSG_LOAD) ||
3539 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3542 (f.daemon_listen || queue_interval > 0) &&
3543 (sender_address != NULL || list_options || list_queue || checking ||
3547 f.daemon_listen && queue_interval == 0
3550 f.inetd_wait_mode && queue_interval >= 0
3554 (checking || smtp_input || extract_recipients ||
3555 filter_test != FTEST_NONE || bi_option)
3558 verify_address_mode &&
3559 (f.address_test_mode || smtp_input || extract_recipients ||
3560 filter_test != FTEST_NONE || bi_option)
3563 f.address_test_mode && (smtp_input || extract_recipients ||
3564 filter_test != FTEST_NONE || bi_option)
3567 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3571 deliver_selectstring != NULL && queue_interval < 0
3574 msg_action == MSG_LOAD &&
3575 (!expansion_test || expansion_test_message != NULL)
3578 exim_fail("exim: incompatible command-line options or arguments\n");
3580 /* If debugging is set up, set the file and the file descriptor to pass on to
3581 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3582 to run in the foreground. */
3584 if (debug_selector != 0)
3586 debug_file = stderr;
3587 debug_fd = fileno(debug_file);
3588 f.background_daemon = FALSE;
3589 testharness_pause_ms(100); /* lets caller finish */
3590 if (debug_selector != D_v) /* -v only doesn't show this */
3592 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3593 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3595 if (!version_printed)
3596 show_whats_supported(stderr);
3600 /* When started with root privilege, ensure that the limits on the number of
3601 open files and the number of processes (where that is accessible) are
3602 sufficiently large, or are unset, in case Exim has been called from an
3603 environment where the limits are screwed down. Not all OS have the ability to
3604 change some of these limits. */
3608 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3614 #ifdef RLIMIT_NOFILE
3615 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3617 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3619 rlp.rlim_cur = rlp.rlim_max = 0;
3622 /* I originally chose 1000 as a nice big number that was unlikely to
3623 be exceeded. It turns out that some older OS have a fixed upper limit of
3626 if (rlp.rlim_cur < 1000)
3628 rlp.rlim_cur = rlp.rlim_max = 1000;
3629 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3631 rlp.rlim_cur = rlp.rlim_max = 256;
3632 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3633 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3640 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3642 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3644 rlp.rlim_cur = rlp.rlim_max = 0;
3647 #ifdef RLIM_INFINITY
3648 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3650 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3652 if (rlp.rlim_cur < 1000)
3654 rlp.rlim_cur = rlp.rlim_max = 1000;
3656 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3657 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3663 /* Exim is normally entered as root (but some special configurations are
3664 possible that don't do this). However, it always spins off sub-processes that
3665 set their uid and gid as required for local delivery. We don't want to pass on
3666 any extra groups that root may belong to, so we want to get rid of them all at
3669 We need to obey setgroups() at this stage, before possibly giving up root
3670 privilege for a changed configuration file, but later on we might need to
3671 check on the additional groups for the admin user privilege - can't do that
3672 till after reading the config, which might specify the exim gid. Therefore,
3673 save the group list here first. */
3675 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3676 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3678 /* There is a fundamental difference in some BSD systems in the matter of
3679 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3680 known not to be different. On the "different" systems there is a single group
3681 list, and the first entry in it is the current group. On all other versions of
3682 Unix there is a supplementary group list, which is in *addition* to the current
3683 group. Consequently, to get rid of all extraneous groups on a "standard" system
3684 you pass over 0 groups to setgroups(), while on a "different" system you pass
3685 over a single group - the current group, which is always the first group in the
3686 list. Calling setgroups() with zero groups on a "different" system results in
3687 an error return. The following code should cope with both types of system.
3689 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3690 the "setgroups() with zero groups" - and changes the egid.
3691 Thanks to that we had to stash the original_egid above, for use below
3692 in the call to exim_setugid().
3694 However, if this process isn't running as root, setgroups() can't be used
3695 since you have to be root to run it, even if throwing away groups.
3696 Except, sigh, for Hurd - where you can.
3697 Not being root here happens only in some unusual configurations. */
3700 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3701 && setgroups(0, NULL) != 0
3703 && setgroups(1, group_list) != 0)
3704 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3706 /* If the configuration file name has been altered by an argument on the
3707 command line (either a new file name or a macro definition) and the caller is
3708 not root, or if this is a filter testing run, remove any setuid privilege the
3709 program has and run as the underlying user.
3711 The exim user is locked out of this, which severely restricts the use of -C
3714 Otherwise, set the real ids to the effective values (should be root unless run
3715 from inetd, which it can either be root or the exim uid, if one is configured).
3717 There is a private mechanism for bypassing some of this, in order to make it
3718 possible to test lots of configurations automatically, without having either to
3719 recompile each time, or to patch in an actual configuration file name and other
3720 values (such as the path name). If running in the test harness, pretend that
3721 configuration file changes and macro definitions haven't happened. */
3724 (!f.trusted_config || /* Config changed, or */
3725 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3726 real_uid != root_uid && /* Not root, and */
3727 !f.running_in_test_harness /* Not fudged */
3729 expansion_test /* expansion testing */
3731 filter_test != FTEST_NONE) /* Filter testing */
3733 setgroups(group_count, group_list);
3734 exim_setugid(real_uid, real_gid, FALSE,
3735 US"-C, -D, -be or -bf forces real uid");
3736 removed_privilege = TRUE;
3738 /* In the normal case when Exim is called like this, stderr is available
3739 and should be used for any logging information because attempts to write
3740 to the log will usually fail. To arrange this, we unset really_exim. However,
3741 if no stderr is available there is no point - we might as well have a go
3742 at the log (if it fails, syslog will be written).
3744 Note that if the invoker is Exim, the logs remain available. Messing with
3745 this causes unlogged successful deliveries. */
3747 if (log_stderr && real_uid != exim_uid)
3748 f.really_exim = FALSE;
3751 /* Privilege is to be retained for the moment. It may be dropped later,
3752 depending on the job that this Exim process has been asked to do. For now, set
3753 the real uid to the effective so that subsequent re-execs of Exim are done by a
3757 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3759 /* If testing a filter, open the file(s) now, before wasting time doing other
3760 setups and reading the message. */
3762 if (filter_test & FTEST_SYSTEM)
3763 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3764 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3767 if (filter_test & FTEST_USER)
3768 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3769 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3772 /* Initialise lookup_list
3773 If debugging, already called above via version reporting.
3774 In either case, we initialise the list of available lookups while running
3775 as root. All dynamically modules are loaded from a directory which is
3776 hard-coded into the binary and is code which, if not a module, would be
3777 part of Exim already. Ability to modify the content of the directory
3778 is equivalent to the ability to modify a setuid binary!
3780 This needs to happen before we read the main configuration. */
3784 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3787 /* Read the main runtime configuration data; this gives up if there
3788 is a failure. It leaves the configuration file open so that the subsequent
3789 configuration data for delivery can be read if needed.
3791 NOTE: immediately after opening the configuration file we change the working
3792 directory to "/"! Later we change to $spool_directory. We do it there, because
3793 during readconf_main() some expansion takes place already. */
3795 /* Store the initial cwd before we change directories. Can be NULL if the
3796 dir has already been unlinked. */
3797 initial_cwd = os_getcwd(NULL, 0);
3800 -be[m] expansion test -
3801 -b[fF] filter test new
3803 -bmalware malware_test_file new
3805 -brw rewrite test new
3807 -bv[s] address verify -
3809 -bP <option> (except -bP config, which sets list_config)
3811 If any of these options is set, we suppress warnings about configuration
3812 issues (currently about tls_advertise_hosts and keep_environment not being
3816 #ifdef MEASURE_TIMING
3817 struct timeval t0, diff;
3818 (void)gettimeofday(&t0, NULL);
3821 readconf_main(checking || list_options);
3823 #ifdef MEASURE_TIMING
3824 report_time_since(&t0, US"readconf_main (delta)");
3829 /* Now in directory "/" */
3831 if (cleanup_environment() == FALSE)
3832 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3835 /* If an action on specific messages is requested, or if a daemon or queue
3836 runner is being started, we need to know if Exim was called by an admin user.
3837 This is the case if the real user is root or exim, or if the real group is
3838 exim, or if one of the supplementary groups is exim or a group listed in
3839 admin_groups. We don't fail all message actions immediately if not admin_user,
3840 since some actions can be performed by non-admin users. Instead, set admin_user
3841 for later interrogation. */
3843 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3844 f.admin_user = TRUE;
3846 for (int i = 0; i < group_count && !f.admin_user; i++)
3847 if (group_list[i] == exim_gid)
3848 f.admin_user = TRUE;
3849 else if (admin_groups)
3850 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3851 if (admin_groups[j] == group_list[i])
3852 f.admin_user = TRUE;
3854 /* Another group of privileged users are the trusted users. These are root,
3855 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3856 are permitted to specify sender_addresses with -f on the command line, and
3857 other message parameters as well. */
3859 if (real_uid == root_uid || real_uid == exim_uid)
3860 f.trusted_caller = TRUE;
3864 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3865 if (trusted_users[i] == real_uid)
3866 f.trusted_caller = TRUE;
3869 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3870 if (trusted_groups[i] == real_gid)
3871 f.trusted_caller = TRUE;
3872 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3873 if (trusted_groups[i] == group_list[j])
3874 f.trusted_caller = TRUE;
3877 /* At this point, we know if the user is privileged and some command-line
3878 options become possibly impermissible, depending upon the configuration file. */
3880 if (checking && commandline_checks_require_admin && !f.admin_user)
3881 exim_fail("exim: those command-line flags are set to require admin\n");
3883 /* Handle the decoding of logging options. */
3885 decode_bits(log_selector, log_selector_size, log_notall,
3886 log_selector_string, log_options, log_options_count, US"log", 0);
3890 debug_printf("configuration file is %s\n", config_main_filename);
3891 debug_printf("log selectors =");
3892 for (int i = 0; i < log_selector_size; i++)
3893 debug_printf(" %08x", log_selector[i]);
3897 /* If domain literals are not allowed, check the sender address that was
3898 supplied with -f. Ditto for a stripped trailing dot. */
3902 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3903 exim_fail("exim: bad -f address \"%s\": domain literals not "
3904 "allowed\n", sender_address);
3905 if (f_end_dot && !strip_trailing_dot)
3906 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3907 "(trailing dot not allowed)\n", sender_address);
3910 /* See if an admin user overrode our logging. */
3912 if (cmdline_syslog_name)
3915 syslog_processname = cmdline_syslog_name;
3916 log_file_path = string_copy(CUS"syslog");
3919 /* not a panic, non-privileged users should not be able to spam paniclog */
3921 "exim: you lack sufficient privilege to specify syslog process name\n");
3923 /* Paranoia check of maximum lengths of certain strings. There is a check
3924 on the length of the log file path in log.c, which will come into effect
3925 if there are any calls to write the log earlier than this. However, if we
3926 get this far but the string is very long, it is better to stop now than to
3927 carry on and (e.g.) receive a message and then have to collapse. The call to
3928 log_write() from here will cause the ultimate panic collapse if the complete
3929 file name exceeds the buffer length. */
3931 if (Ustrlen(log_file_path) > 200)
3932 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3933 "log_file_path is longer than 200 chars: aborting");
3935 if (Ustrlen(pid_file_path) > 200)
3936 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3937 "pid_file_path is longer than 200 chars: aborting");
3939 if (Ustrlen(spool_directory) > 200)
3940 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3941 "spool_directory is longer than 200 chars: aborting");
3943 /* Length check on the process name given to syslog for its TAG field,
3944 which is only permitted to be 32 characters or less. See RFC 3164. */
3946 if (Ustrlen(syslog_processname) > 32)
3947 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3948 "syslog_processname is longer than 32 chars: aborting");
3953 log_write(0, LOG_MAIN, "%s", log_oneline);
3954 return EXIT_SUCCESS;
3957 return EXIT_FAILURE;
3959 /* In some operating systems, the environment variable TMPDIR controls where
3960 temporary files are created; Exim doesn't use these (apart from when delivering
3961 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3962 If TMPDIR is found in the environment, reset it to the value defined in the
3963 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3964 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3965 EXIM_TMPDIR by the build scripts.
3969 if (environ) for (uschar ** p = USS environ; *p; p++)
3970 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3972 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3973 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3975 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3979 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3980 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3981 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3982 called by a user who has set the TZ variable. This then affects the timestamps
3983 in log files and in Received: headers, and any created Date: header lines. The
3984 required timezone is settable in the configuration file, so nothing can be done
3985 about this earlier - but hopefully nothing will normally be logged earlier than
3986 this. We have to make a new environment if TZ is wrong, but don't bother if
3987 timestamps_utc is set, because then all times are in UTC anyway. */
3989 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3990 f.timestamps_utc = TRUE;
3993 uschar *envtz = US getenv("TZ");
3995 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3996 : timezone_string != NULL
3999 uschar **p = USS environ;
4003 if (environ) while (*p++) count++;
4004 if (!envtz) count++;
4005 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4006 if (environ) for (p = USS environ; *p; p++)
4007 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4008 if (timezone_string)
4010 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4011 sprintf(CS *newp++, "TZ=%s", timezone_string);
4016 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4017 tod_stamp(tod_log));
4021 /* Handle the case when we have removed the setuid privilege because of -C or
4022 -D. This means that the caller of Exim was not root.
4024 There is a problem if we were running as the Exim user. The sysadmin may
4025 expect this case to retain privilege because "the binary was called by the
4026 Exim user", but it hasn't, because either the -D option set macros, or the
4027 -C option set a non-trusted configuration file. There are two possibilities:
4029 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4030 to do message deliveries. Thus, the fact that it is running as a
4031 non-privileged user is plausible, and might be wanted in some special
4032 configurations. However, really_exim will have been set false when
4033 privilege was dropped, to stop Exim trying to write to its normal log
4034 files. Therefore, re-enable normal log processing, assuming the sysadmin
4035 has set up the log directory correctly.
4037 (2) If deliver_drop_privilege is not set, the configuration won't work as
4038 apparently intended, and so we log a panic message. In order to retain
4039 root for -C or -D, the caller must either be root or be invoking a
4040 trusted configuration file (when deliver_drop_privilege is false). */
4042 if ( removed_privilege
4043 && (!f.trusted_config || opt_D_used)
4044 && real_uid == exim_uid)
4045 if (deliver_drop_privilege)
4046 f.really_exim = TRUE; /* let logging work normally */
4048 log_write(0, LOG_MAIN|LOG_PANIC,
4049 "exim user lost privilege for using %s option",
4050 f.trusted_config? "-D" : "-C");
4052 /* Start up Perl interpreter if Perl support is configured and there is a
4053 perl_startup option, and the configuration or the command line specifies
4054 initializing starting. Note that the global variables are actually called
4055 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4058 if (perl_start_option != 0)
4059 opt_perl_at_start = (perl_start_option > 0);
4060 if (opt_perl_at_start && opt_perl_startup != NULL)
4063 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4064 if ((errstr = init_perl(opt_perl_startup)))
4065 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4066 opt_perl_started = TRUE;
4068 #endif /* EXIM_PERL */
4070 /* Log the arguments of the call if the configuration file said so. This is
4071 a debugging feature for finding out what arguments certain MUAs actually use.
4072 Don't attempt it if logging is disabled, or if listing variables or if
4073 verifying/testing addresses or expansions. */
4075 if ( (debug_selector & D_any || LOGGING(arguments))
4076 && f.really_exim && !list_options && !checking)
4078 uschar *p = big_buffer;
4079 Ustrcpy(p, US"cwd= (failed)");
4085 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4086 p += 4 + Ustrlen(initial_cwd);
4087 /* in case p is near the end and we don't provide enough space for
4088 * string_format to be willing to write. */
4092 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4094 for (int i = 0; i < argc; i++)
4096 int len = Ustrlen(argv[i]);
4097 const uschar *printing;
4099 if (p + len + 8 >= big_buffer + big_buffer_size)
4101 Ustrcpy(p, US" ...");
4102 log_write(0, LOG_MAIN, "%s", big_buffer);
4103 Ustrcpy(big_buffer, US"...");
4106 printing = string_printing(argv[i]);
4107 if (!*printing) quote = US"\"";
4110 const uschar *pp = printing;
4112 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4114 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4115 (p - big_buffer) - 4), printing, quote);
4118 if (LOGGING(arguments))
4119 log_write(0, LOG_MAIN, "%s", big_buffer);
4121 debug_printf("%s\n", big_buffer);
4124 /* Set the working directory to be the top-level spool directory. We don't rely
4125 on this in the code, which always uses fully qualified names, but it's useful
4126 for core dumps etc. Don't complain if it fails - the spool directory might not
4127 be generally accessible and calls with the -C option (and others) have lost
4128 privilege by now. Before the chdir, we try to ensure that the directory exists.
4131 if (Uchdir(spool_directory) != 0)
4134 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4135 dummy = /* quieten compiler */ Uchdir(spool_directory);
4136 dummy = dummy; /* yet more compiler quietening, sigh */
4139 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4140 alias file. Exim doesn't have such a concept, but this call is screwed into
4141 Sun's YP makefiles. Handle this by calling a configured script, as the real
4142 user who called Exim. The -oA option can be used to pass an argument to the
4147 (void)fclose(config_file);
4152 argv[i++] = bi_command;
4153 if (alias_arg) argv[i++] = alias_arg;
4156 setgroups(group_count, group_list);
4157 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4159 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4160 argv[1] ? argv[1] : US"");
4162 execv(CS argv[0], (char *const *)argv);
4163 exim_fail("exim: exec failed: %s\n", strerror(errno));
4167 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4172 /* We moved the admin/trusted check to be immediately after reading the
4173 configuration file. We leave these prints here to ensure that syslog setup,
4174 logfile setup, and so on has already happened. */
4176 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4177 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4179 /* Only an admin user may start the daemon or force a queue run in the default
4180 configuration, but the queue run restriction can be relaxed. Only an admin
4181 user may request that a message be returned to its sender forthwith. Only an
4182 admin user may specify a debug level greater than D_v (because it might show
4183 passwords, etc. in lookup queries). Only an admin user may request a queue
4184 count. Only an admin user can use the test interface to scan for email
4185 (because Exim will be in the spool dir and able to look at mails). */
4189 BOOL debugset = (debug_selector & ~D_v) != 0;
4190 if ( deliver_give_up || f.daemon_listen || malware_test_file
4191 || count_queue && queue_list_requires_admin
4192 || list_queue && queue_list_requires_admin
4193 || queue_interval >= 0 && prod_requires_admin
4194 || queue_name_dest && prod_requires_admin
4195 || debugset && !f.running_in_test_harness
4197 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4200 /* If the real user is not root or the exim uid, the argument for passing
4201 in an open TCP/IP connection for another message is not permitted, nor is
4202 running with the -N option for any delivery action, unless this call to exim is
4203 one that supplied an input message, or we are using a patched exim for
4204 regression testing. */
4206 if (real_uid != root_uid && real_uid != exim_uid &&
4207 (continue_hostname != NULL ||
4209 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4210 )) && !f.running_in_test_harness)
4211 exim_fail("exim: Permission denied\n");
4213 /* If the caller is not trusted, certain arguments are ignored when running for
4214 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4215 Note that authority for performing certain actions on messages is tested in the
4216 queue_action() function. */
4218 if (!f.trusted_caller && !checking)
4220 sender_host_name = sender_host_address = interface_address =
4221 sender_ident = received_protocol = NULL;
4222 sender_host_port = interface_port = 0;
4223 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4226 /* If a sender host address is set, extract the optional port number off the
4227 end of it and check its syntax. Do the same thing for the interface address.
4228 Exim exits if the syntax is bad. */
4232 if (sender_host_address != NULL)
4233 sender_host_port = check_port(sender_host_address);
4234 if (interface_address != NULL)
4235 interface_port = check_port(interface_address);
4238 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4241 if (f.trusted_caller)
4243 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4244 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4247 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4250 /* If an SMTP message is being received check to see if the standard input is a
4251 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4252 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4257 union sockaddr_46 inetd_sock;
4258 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4259 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4261 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4262 if (family == AF_INET || family == AF_INET6)
4264 union sockaddr_46 interface_sock;
4265 size = sizeof(interface_sock);
4267 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4268 interface_address = host_ntoa(-1, &interface_sock, NULL,
4271 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4273 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4276 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4277 NULL, &sender_host_port);
4278 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4279 "inetd is not supported when mua_wrapper is set");
4283 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4288 /* If the load average is going to be needed while receiving a message, get it
4289 now for those OS that require the first call to os_getloadavg() to be done as
4290 root. There will be further calls later for each message received. */
4292 #ifdef LOAD_AVG_NEEDS_ROOT
4293 if ( receiving_message
4294 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4295 load_average = OS_GETLOADAVG();
4298 /* The queue_only configuration option can be overridden by -odx on the command
4299 line, except that if queue_only_override is false, queue_only cannot be unset
4300 from the command line. */
4302 if (queue_only_set && (queue_only_override || arg_queue_only))
4303 queue_only = arg_queue_only;
4305 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4308 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4309 if (arg_smtp_receive_timeout >= 0)
4310 smtp_receive_timeout = arg_smtp_receive_timeout;
4312 /* If Exim was started with root privilege, unless we have already removed the
4313 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4314 except when starting the daemon or doing some kind of delivery or address
4315 testing (-bt). These are the only cases when root need to be retained. We run
4316 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4317 retained only for starting the daemon. We always do the initgroups() in this
4318 situation (controlled by the TRUE below), in order to be as close as possible
4319 to the state Exim usually runs in. */
4321 if (!unprivileged && /* originally had root AND */
4322 !removed_privilege && /* still got root AND */
4323 !f.daemon_listen && /* not starting the daemon */
4324 queue_interval <= 0 && /* (either kind of daemon) */
4326 deliver_drop_privilege || /* requested unprivileged */
4328 queue_interval < 0 && /* not running the queue */
4329 (msg_action_arg < 0 || /* and */
4330 msg_action != MSG_DELIVER) && /* not delivering and */
4331 (!checking || !f.address_test_mode) /* not address checking */
4333 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4335 /* When we are retaining a privileged uid, we still change to the exim gid. */
4340 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4341 rv = setgid(exim_gid);
4342 /* Impact of failure is that some stuff might end up with an incorrect group.
4343 We track this for failures from root, since any attempt to change privilege
4344 by root should succeed and failures should be examined. For non-root,
4345 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4346 no need to complain then. */
4348 if (!(unprivileged || removed_privilege))
4349 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4352 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4353 (long int)exim_gid, strerror(errno));
4357 /* Handle a request to scan a file for malware */
4358 if (malware_test_file)
4360 #ifdef WITH_CONTENT_SCAN
4362 set_process_info("scanning file for malware");
4363 result = malware_in_file(malware_test_file);
4366 printf("No malware found.\n");
4371 printf("Malware lookup returned non-okay/fail: %d\n", result);
4375 printf("Malware found: %s\n", malware_name);
4377 printf("Malware scan detected malware of unknown name.\n");
4379 printf("Malware scanning not enabled at compile time.\n");
4384 /* Handle a request to list the delivery queue */
4388 set_process_info("listing the queue");
4389 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4393 /* Handle a request to count the delivery queue */
4397 set_process_info("counting the queue");
4398 fprintf(stdout, "%u\n", queue_count());
4402 /* Handle actions on specific messages, except for the force delivery and
4403 message load actions, which are done below. Some actions take a whole list of
4404 message ids, which are known to continue up to the end of the arguments. Others
4405 take a single message id and then operate on the recipients list. */
4407 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4409 int yield = EXIT_SUCCESS;
4410 set_process_info("acting on specified messages");
4412 /* ACL definitions may be needed when removing a message (-Mrm) because
4413 event_action gets expanded */
4415 if (msg_action == MSG_REMOVE)
4418 if (!one_msg_action)
4420 for (i = msg_action_arg; i < argc; i++)
4421 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4422 yield = EXIT_FAILURE;
4425 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4426 default: printf("\n"); break;
4430 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4431 recipients_arg)) yield = EXIT_FAILURE;
4435 /* We used to set up here to skip reading the ACL section, on
4436 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4437 Now, since the intro of the ${acl } expansion, ACL definitions may be
4438 needed in transports so we lost the optimisation. */
4441 #ifdef MEASURE_TIMING
4442 struct timeval t0, diff;
4443 (void)gettimeofday(&t0, NULL);
4448 #ifdef MEASURE_TIMING
4449 report_time_since(&t0, US"readconf_rest (delta)");
4453 /* Handle the -brt option. This is for checking out retry configurations.
4454 The next three arguments are a domain name or a complete address, and
4455 optionally two error numbers. All it does is to call the function that
4456 scans the retry configuration data. */
4458 if (test_retry_arg >= 0)
4460 retry_config *yield;
4461 int basic_errno = 0;
4465 if (test_retry_arg >= argc)
4467 printf("-brt needs a domain or address argument\n");
4468 exim_exit(EXIT_FAILURE);
4470 s1 = argv[test_retry_arg++];
4473 /* If the first argument contains no @ and no . it might be a local user
4474 or it might be a single-component name. Treat as a domain. */
4476 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4478 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4479 "being \ntreated as a one-component domain, not as a local part.\n\n",
4483 /* There may be an optional second domain arg. */
4485 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4486 s2 = argv[test_retry_arg++];
4488 /* The final arg is an error name */
4490 if (test_retry_arg < argc)
4492 uschar *ss = argv[test_retry_arg];
4494 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4497 printf("%s\n", CS error);
4498 return EXIT_FAILURE;
4501 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4502 code > 100 as an error is for matching codes to the decade. Turn them into
4503 a real error code, off the decade. */
4505 if (basic_errno == ERRNO_MAIL4XX ||
4506 basic_errno == ERRNO_RCPT4XX ||
4507 basic_errno == ERRNO_DATA4XX)
4509 int code = (more_errno >> 8) & 255;
4511 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4512 else if (code > 100)
4513 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4517 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4518 printf("No retry information found\n");
4521 more_errno = yield->more_errno;
4522 printf("Retry rule: %s ", yield->pattern);
4524 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4526 printf("quota%s%s ",
4527 (more_errno > 0)? "_" : "",
4528 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4530 else if (yield->basic_errno == ECONNREFUSED)
4532 printf("refused%s%s ",
4533 (more_errno > 0)? "_" : "",
4534 (more_errno == 'M')? "MX" :
4535 (more_errno == 'A')? "A" : "");
4537 else if (yield->basic_errno == ETIMEDOUT)
4540 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4542 if (more_errno != 0) printf("_%s",
4543 (more_errno == 'M')? "MX" : "A");
4546 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4547 printf("auth_failed ");
4550 for (retry_rule * r = yield->rules; r; r = r->next)
4552 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4553 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4559 printf(",%d.", x/1000);
4573 exim_exit(EXIT_SUCCESS);
4576 /* Handle a request to list one or more configuration options */
4577 /* If -n was set, we suppress some information */
4582 set_process_info("listing variables");
4583 if (recipients_arg >= argc)
4584 fail = !readconf_print(US"all", NULL, flag_n);
4585 else for (i = recipients_arg; i < argc; i++)
4588 (Ustrcmp(argv[i], "router") == 0 ||
4589 Ustrcmp(argv[i], "transport") == 0 ||
4590 Ustrcmp(argv[i], "authenticator") == 0 ||
4591 Ustrcmp(argv[i], "macro") == 0 ||
4592 Ustrcmp(argv[i], "environment") == 0))
4594 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4598 fail = !readconf_print(argv[i], NULL, flag_n);
4600 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4605 set_process_info("listing config");
4606 exim_exit(readconf_print(US"config", NULL, flag_n)
4607 ? EXIT_SUCCESS : EXIT_FAILURE);
4611 /* Initialise subsystems as required. */
4615 /* Handle a request to deliver one or more messages that are already on the
4616 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4617 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4619 Delivery of specific messages is typically used for a small number when
4620 prodding by hand (when the option forced_delivery will be set) or when
4621 re-execing to regain root privilege. Each message delivery must happen in a
4622 separate process, so we fork a process for each one, and run them sequentially
4623 so that debugging output doesn't get intertwined, and to avoid spawning too
4624 many processes if a long list is given. However, don't fork for the last one;
4625 this saves a process in the common case when Exim is called to deliver just one
4628 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4630 if (prod_requires_admin && !f.admin_user)
4632 fprintf(stderr, "exim: Permission denied\n");
4633 exim_exit(EXIT_FAILURE);
4635 set_process_info("delivering specified messages");
4636 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4637 for (i = msg_action_arg; i < argc; i++)
4641 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4642 that runs into a later copy into the untainted global message_id[] */
4644 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4645 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4647 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4648 exim_underbar_exit(EXIT_SUCCESS);
4652 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4654 exim_exit(EXIT_FAILURE);
4658 exim_exit(EXIT_SUCCESS);
4662 /* If only a single queue run is requested, without SMTP listening, we can just
4663 turn into a queue runner, with an optional starting message id. */
4665 if (queue_interval == 0 && !f.daemon_listen)
4667 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4668 start_queue_run_id ? US" starting at " : US"",
4669 start_queue_run_id ? start_queue_run_id: US"",
4670 stop_queue_run_id ? US" stopping at " : US"",
4671 stop_queue_run_id ? stop_queue_run_id : US"");
4673 set_process_info("running the '%s' queue (single queue run)", queue_name);
4675 set_process_info("running the queue (single queue run)");
4676 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4677 exim_exit(EXIT_SUCCESS);
4681 /* Find the login name of the real user running this process. This is always
4682 needed when receiving a message, because it is written into the spool file. It
4683 may also be used to construct a from: or a sender: header, and in this case we
4684 need the user's full name as well, so save a copy of it, checked for RFC822
4685 syntax and munged if necessary, if it hasn't previously been set by the -F
4686 argument. We may try to get the passwd entry more than once, in case NIS or
4687 other delays are in evidence. Save the home directory for use in filter testing
4692 if ((pw = getpwuid(real_uid)) != NULL)
4694 originator_login = string_copy(US pw->pw_name);
4695 originator_home = string_copy(US pw->pw_dir);
4697 /* If user name has not been set by -F, set it from the passwd entry
4698 unless -f has been used to set the sender address by a trusted user. */
4700 if (!originator_name)
4702 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4704 uschar *name = US pw->pw_gecos;
4705 uschar *amp = Ustrchr(name, '&');
4708 /* Most Unix specify that a '&' character in the gecos field is
4709 replaced by a copy of the login name, and some even specify that
4710 the first character should be upper cased, so that's what we do. */
4715 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4716 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4717 buffer[loffset] = toupper(buffer[loffset]);
4721 /* If a pattern for matching the gecos field was supplied, apply
4722 it and then expand the name string. */
4724 if (gecos_pattern && gecos_name)
4727 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4729 if (regex_match_and_setup(re, name, 0, -1))
4731 uschar *new_name = expand_string(gecos_name);
4735 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4736 "gecos field \"%s\"\n", new_name, name);
4739 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4740 "\"%s\": %s\n", gecos_name, expand_string_message);
4742 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4743 "gecos field \"%s\"\n", gecos_pattern, name);
4744 store_free((void *)re);
4746 originator_name = string_copy(name);
4749 /* A trusted caller has used -f but not -F */
4751 else originator_name = US"";
4754 /* Break the retry loop */
4759 if (++i > finduser_retries) break;
4763 /* If we cannot get a user login, log the incident and give up, unless the
4764 configuration specifies something to use. When running in the test harness,
4765 any setting of unknown_login overrides the actual name. */
4767 if (originator_login == NULL || f.running_in_test_harness)
4769 if (unknown_login != NULL)
4771 originator_login = expand_string(unknown_login);
4772 if (originator_name == NULL && unknown_username != NULL)
4773 originator_name = expand_string(unknown_username);
4774 if (originator_name == NULL) originator_name = US"";
4776 if (originator_login == NULL)
4777 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4781 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4784 originator_name = parse_fix_phrase(originator_name, Ustrlen(originator_name));
4786 /* If a message is created by this call of Exim, the uid/gid of its originator
4787 are those of the caller. These values are overridden if an existing message is
4788 read in from the spool. */
4790 originator_uid = real_uid;
4791 originator_gid = real_gid;
4793 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4794 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4796 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4797 returns. We leave this till here so that the originator_ fields are available
4798 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4801 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4805 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4806 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4807 "mua_wrapper is set");
4810 # ifndef DISABLE_TLS
4811 /* This also checks that the library linkage is working and we can call
4812 routines in it, so call even if tls_require_ciphers is unset */
4814 # ifdef MEASURE_TIMING
4815 struct timeval t0, diff;
4816 (void)gettimeofday(&t0, NULL);
4818 if (!tls_dropprivs_validate_require_cipher(FALSE))
4820 # ifdef MEASURE_TIMING
4821 report_time_since(&t0, US"validate_ciphers (delta)");
4829 /* If the sender ident has not been set (by a trusted caller) set it to
4830 the caller. This will get overwritten below for an inetd call. If a trusted
4831 caller has set it empty, unset it. */
4833 if (!sender_ident) sender_ident = originator_login;
4834 else if (!*sender_ident) sender_ident = NULL;
4836 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4837 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4838 originator_* variables set. */
4840 if (test_rewrite_arg >= 0)
4842 f.really_exim = FALSE;
4843 if (test_rewrite_arg >= argc)
4845 printf("-brw needs an address argument\n");
4846 exim_exit(EXIT_FAILURE);
4848 rewrite_test(argv[test_rewrite_arg]);
4849 exim_exit(EXIT_SUCCESS);
4852 /* A locally-supplied message is considered to be coming from a local user
4853 unless a trusted caller supplies a sender address with -f, or is passing in the
4854 message via SMTP (inetd invocation or otherwise). */
4856 if ( !sender_address && !smtp_input
4857 || !f.trusted_caller && filter_test == FTEST_NONE)
4859 f.sender_local = TRUE;
4861 /* A trusted caller can supply authenticated_sender and authenticated_id
4862 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4863 defaults except when host checking. */
4865 if (!authenticated_sender && !host_checking)
4866 authenticated_sender = string_sprintf("%s@%s", originator_login,
4867 qualify_domain_sender);
4868 if (!authenticated_id && !host_checking)
4869 authenticated_id = originator_login;
4872 /* Trusted callers are always permitted to specify the sender address.
4873 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4874 is specified is the empty address. However, if a trusted caller does not
4875 specify a sender address for SMTP input, we leave sender_address unset. This
4876 causes the MAIL commands to be honoured. */
4878 if ( !smtp_input && !sender_address
4879 || !receive_check_set_sender(sender_address))
4881 /* Either the caller is not permitted to set a general sender, or this is
4882 non-SMTP input and the trusted caller has not set a sender. If there is no
4883 sender, or if a sender other than <> is set, override with the originator's
4884 login (which will get qualified below), except when checking things. */
4886 if (sender_address == NULL /* No sender_address set */
4888 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4889 !checking)) /* Not running tests, including filter tests */
4891 sender_address = originator_login;
4892 f.sender_address_forced = FALSE;
4893 sender_address_domain = 0;
4897 /* Remember whether an untrusted caller set the sender address */
4899 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4901 /* Ensure that the sender address is fully qualified unless it is the empty
4902 address, which indicates an error message, or doesn't exist (root caller, smtp
4903 interface, no -f argument). */
4905 if (sender_address && *sender_address && sender_address_domain == 0)
4906 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4907 qualify_domain_sender);
4909 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4911 /* Handle a request to verify a list of addresses, or test them for delivery.
4912 This must follow the setting of the sender address, since routers can be
4913 predicated upon the sender. If no arguments are given, read addresses from
4914 stdin. Set debug_level to at least D_v to get full output for address testing.
4917 if (verify_address_mode || f.address_test_mode)
4920 int flags = vopt_qualify;
4922 if (verify_address_mode)
4924 if (!verify_as_sender) flags |= vopt_is_recipient;
4925 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4930 flags |= vopt_is_recipient;
4931 debug_selector |= D_v;
4932 debug_file = stderr;
4933 debug_fd = fileno(debug_file);
4934 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4937 if (recipients_arg < argc)
4939 while (recipients_arg < argc)
4941 /* Supplied addresses are tainted since they come from a user */
4942 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4945 BOOL finished = FALSE;
4946 uschar *ss = parse_find_address_end(s, FALSE);
4947 if (*ss == ',') *ss = 0; else finished = TRUE;
4948 test_address(s, flags, &exit_value);
4951 while (*++s == ',' || isspace(*s)) ;
4958 uschar * s = get_stdinput(NULL, NULL);
4960 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4964 exim_exit(exit_value);
4967 /* Handle expansion checking. Either expand items on the command line, or read
4968 from stdin if there aren't any. If -Mset was specified, load the message so
4969 that its variables can be used, but restrict this facility to admin users.
4970 Otherwise, if -bem was used, read a message from stdin. */
4974 dns_init(FALSE, FALSE, FALSE);
4975 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4977 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4979 exim_fail("exim: permission denied\n");
4980 message_id = argv[msg_action_arg];
4981 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4982 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4983 printf ("Failed to load message datafile %s\n", message_id);
4984 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4985 printf ("Failed to load message %s\n", message_id);
4988 /* Read a test message from a file. We fudge it up to be on stdin, saving
4989 stdin itself for later reading of expansion strings. */
4991 else if (expansion_test_message)
4993 int save_stdin = dup(0);
4994 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4996 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4999 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5000 message_ended = END_NOTENDED;
5001 read_message_body(receive_msg(extract_recipients));
5002 message_linecount += body_linecount;
5003 (void)dup2(save_stdin, 0);
5004 (void)close(save_stdin);
5005 clearerr(stdin); /* Required by Darwin */
5008 /* Only admin users may see config-file macros this way */
5010 if (!f.admin_user) macros_user = macros = mlast = NULL;
5012 /* Allow $recipients for this testing */
5014 f.enable_dollar_recipients = TRUE;
5016 /* Expand command line items */
5018 if (recipients_arg < argc)
5019 while (recipients_arg < argc)
5020 expansion_test_line(argv[recipients_arg++]);
5026 char *(*fn_readline)(const char *) = NULL;
5027 void (*fn_addhist)(const char *) = NULL;
5031 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5034 while (s = get_stdinput(fn_readline, fn_addhist))
5035 expansion_test_line(s);
5038 if (dlhandle) dlclose(dlhandle);
5042 /* The data file will be open after -Mset */
5044 if (deliver_datafile >= 0)
5046 (void)close(deliver_datafile);
5047 deliver_datafile = -1;
5050 exim_exit(EXIT_SUCCESS);
5054 /* The active host name is normally the primary host name, but it can be varied
5055 for hosts that want to play several parts at once. We need to ensure that it is
5056 set for host checking, and for receiving messages. */
5058 smtp_active_hostname = primary_hostname;
5059 if (raw_active_hostname != NULL)
5061 uschar *nah = expand_string(raw_active_hostname);
5064 if (!f.expand_string_forcedfail)
5065 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5066 "(smtp_active_hostname): %s", raw_active_hostname,
5067 expand_string_message);
5069 else if (nah[0] != 0) smtp_active_hostname = nah;
5072 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5073 given IP address so that the blocking and relay configuration can be tested.
5074 Unless a sender_ident was set by -oMt, we discard it (the default is the
5075 caller's login name). An RFC 1413 call is made only if we are running in the
5076 test harness and an incoming interface and both ports are specified, because
5077 there is no TCP/IP call to find the ident for. */
5084 if (!sender_ident_set)
5086 sender_ident = NULL;
5087 if (f.running_in_test_harness && sender_host_port
5088 && interface_address && interface_port)
5089 verify_get_ident(1223); /* note hardwired port number */
5092 /* In case the given address is a non-canonical IPv6 address, canonicalize
5093 it. The code works for both IPv4 and IPv6, as it happens. */
5095 size = host_aton(sender_host_address, x);
5096 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5097 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5099 /* Now set up for testing */
5101 host_build_sender_fullhost();
5105 f.sender_local = FALSE;
5106 f.sender_host_notsocket = TRUE;
5107 debug_file = stderr;
5108 debug_fd = fileno(debug_file);
5109 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5110 "**** but without any ident (RFC 1413) callback.\n"
5111 "**** This is not for real!\n\n",
5112 sender_host_address);
5114 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5115 if (verify_check_host(&hosts_connection_nolog) == OK)
5116 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5117 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5119 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5120 because a log line has already been written for all its failure exists
5121 (usually "connection refused: <reason>") and writing another one is
5122 unnecessary clutter. */
5124 if (smtp_start_session())
5127 for (; (reset_point = store_mark()); store_reset(reset_point))
5129 if (smtp_setup_msg() <= 0) break;
5130 if (!receive_msg(FALSE)) break;
5132 return_path = sender_address = NULL;
5133 dnslist_domain = dnslist_matched = NULL;
5134 #ifndef DISABLE_DKIM
5135 dkim_cur_signer = NULL;
5138 deliver_localpart_orig = NULL;
5139 deliver_domain_orig = NULL;
5140 callout_address = sending_ip_address = NULL;
5141 deliver_localpart_data = deliver_domain_data =
5142 recipient_data = sender_data = NULL;
5143 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5147 exim_exit(EXIT_SUCCESS);
5151 /* Arrange for message reception if recipients or SMTP were specified;
5152 otherwise complain unless a version print (-bV) happened or this is a filter
5153 verification test or info dump.
5154 In the former case, show the configuration file name. */
5156 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5158 if (version_printed)
5160 if (Ustrchr(config_main_filelist, ':'))
5161 printf("Configuration file search path is %s\n", config_main_filelist);
5162 printf("Configuration file is %s\n", config_main_filename);
5163 return EXIT_SUCCESS;
5166 if (info_flag != CMDINFO_NONE)
5168 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5169 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5172 if (filter_test == FTEST_NONE)
5173 exim_usage(called_as);
5177 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5178 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5179 that we are not called from inetd, because that is rejected above. The
5180 following configuration settings are forced here:
5182 (1) Synchronous delivery (-odi)
5183 (2) Errors to stderr (-oep == -oeq)
5184 (3) No parallel remote delivery
5185 (4) Unprivileged delivery
5187 We don't force overall queueing options because there are several of them;
5188 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5189 to override any SMTP queueing. */
5193 f.synchronous_delivery = TRUE;
5194 arg_error_handling = ERRORS_STDERR;
5195 remote_max_parallel = 1;
5196 deliver_drop_privilege = TRUE;
5197 f.queue_smtp = FALSE;
5198 queue_smtp_domains = NULL;
5200 message_utf8_downconvert = -1; /* convert-if-needed */
5205 /* Prepare to accept one or more new messages on the standard input. When a
5206 message has been read, its id is returned in message_id[]. If doing immediate
5207 delivery, we fork a delivery process for each received message, except for the
5208 last one, where we can save a process switch.
5210 It is only in non-smtp mode that error_handling is allowed to be changed from
5211 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5212 sendmail error modes other than -oem ever actually used? Later: yes.) */
5214 if (!smtp_input) error_handling = arg_error_handling;
5216 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5217 logging being sent down the socket and make an identd call to get the
5220 else if (f.is_inetd)
5222 (void)fclose(stderr);
5223 exim_nullstd(); /* Re-open to /dev/null */
5224 verify_get_ident(IDENT_PORT);
5225 host_build_sender_fullhost();
5226 set_process_info("handling incoming connection from %s via inetd",
5230 /* If the sender host address has been set, build sender_fullhost if it hasn't
5231 already been done (which it will have been for inetd). This caters for the
5232 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5233 so that the test for IP options is skipped for -bs input. */
5235 if (sender_host_address && !sender_fullhost)
5237 host_build_sender_fullhost();
5238 set_process_info("handling incoming connection from %s via -oMa",
5240 f.sender_host_notsocket = TRUE;
5243 /* Otherwise, set the sender host as unknown except for inetd calls. This
5244 prevents host checking in the case of -bs not from inetd and also for -bS. */
5246 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5248 /* If stdout does not exist, then dup stdin to stdout. This can happen
5249 if exim is started from inetd. In this case fd 0 will be set to the socket,
5250 but fd 1 will not be set. This also happens for passed SMTP channels. */
5252 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5254 /* Set up the incoming protocol name and the state of the program. Root is
5255 allowed to force received protocol via the -oMr option above. If we have come
5256 via inetd, the process info has already been set up. We don't set
5257 received_protocol here for smtp input, as it varies according to
5258 batch/HELO/EHLO/AUTH/TLS. */
5262 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5263 smtp_batched_input? "batched " : "",
5264 (sender_address!= NULL)? sender_address : originator_login);
5268 int old_pool = store_pool;
5269 store_pool = POOL_PERM;
5270 if (!received_protocol)
5271 received_protocol = string_sprintf("local%s", called_as);
5272 store_pool = old_pool;
5273 set_process_info("accepting a local non-SMTP message from <%s>",
5277 /* Initialize the session_local_queue-only flag (this will be ignored if
5278 mua_wrapper is set) */
5281 session_local_queue_only = queue_only;
5283 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5284 the spool if so configured. On failure, we must not attempt to send an error
5285 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5286 error code is given.) */
5288 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5289 exim_fail("exim: insufficient disk space\n");
5291 /* If this is smtp input of any kind, real or batched, handle the start of the
5294 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5295 because a log line has already been written for all its failure exists
5296 (usually "connection refused: <reason>") and writing another one is
5297 unnecessary clutter. */
5303 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5304 if (verify_check_host(&hosts_connection_nolog) == OK)
5305 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5306 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5307 if (!smtp_start_session())
5310 exim_exit(EXIT_SUCCESS);
5314 /* Otherwise, set up the input size limit here. */
5318 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5319 if (expand_string_message)
5320 if (thismessage_size_limit == -1)
5321 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5322 "message_size_limit: %s", expand_string_message);
5324 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5325 "message_size_limit: %s", expand_string_message);
5328 /* Loop for several messages when reading SMTP input. If we fork any child
5329 processes, we don't want to wait for them unless synchronous delivery is
5330 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5331 same as SIG_DFL, despite the fact that documentation often lists the default as
5332 "ignore". This is a confusing area. This is what I know:
5334 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5335 processes that complete simply to go away without ever becoming defunct. You
5336 can't then wait for them - but we don't want to wait for them in the
5337 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5338 happen for all OS (e.g. *BSD is different).
5340 But that's not the end of the story. Some (many? all?) systems have the
5341 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5342 has by default, so it seems that the difference is merely one of default
5343 (compare restarting vs non-restarting signals).
5345 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5346 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5347 of the loop below. Paranoia rules.
5349 February 2003: That's *still* not the end of the story. There are now versions
5350 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5351 process then calls waitpid(), a grumble is written to the system log, because
5352 this is logically inconsistent. In other words, it doesn't like the paranoia.
5353 As a consequence of this, the waitpid() below is now excluded if we are sure
5354 that SIG_IGN works. */
5356 if (!f.synchronous_delivery)
5359 struct sigaction act;
5360 act.sa_handler = SIG_IGN;
5361 sigemptyset(&(act.sa_mask));
5362 act.sa_flags = SA_NOCLDWAIT;
5363 sigaction(SIGCHLD, &act, NULL);
5365 signal(SIGCHLD, SIG_IGN);
5369 /* Save the current store pool point, for resetting at the start of
5370 each message, and save the real sender address, if any. */
5372 real_sender_address = sender_address;
5374 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5375 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5380 rmark reset_point = store_mark();
5383 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5384 input and build the recipients list, before calling receive_msg() to read the
5385 message proper. Whatever sender address is given in the SMTP transaction is
5386 often ignored for local senders - we use the actual sender, which is normally
5387 either the underlying user running this process or a -f argument provided by
5388 a trusted caller. It is saved in real_sender_address. The test for whether to
5389 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5394 if ((rc = smtp_setup_msg()) > 0)
5396 if (real_sender_address != NULL &&
5397 !receive_check_set_sender(sender_address))
5399 sender_address = raw_sender = real_sender_address;
5400 sender_address_unrewritten = NULL;
5403 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5404 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5405 the very end. The result of the ACL is ignored (as for other non-SMTP
5406 messages). It is run for its potential side effects. */
5408 if (smtp_batched_input && acl_not_smtp_start != NULL)
5410 uschar *user_msg, *log_msg;
5411 f.enable_dollar_recipients = TRUE;
5412 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5413 &user_msg, &log_msg);
5414 f.enable_dollar_recipients = FALSE;
5417 /* Now get the data for the message */
5419 more = receive_msg(extract_recipients);
5420 if (message_id[0] == 0)
5422 cancel_cutthrough_connection(TRUE, US"receive dropped");
5423 if (more) goto moreloop;
5424 smtp_log_no_mail(); /* Log no mail if configured */
5425 exim_exit(EXIT_FAILURE);
5430 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5431 smtp_log_no_mail(); /* Log no mail if configured */
5432 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5436 /* In the non-SMTP case, we have all the information from the command
5437 line, but must process it in case it is in the more general RFC822
5438 format, and in any case, to detect syntax errors. Also, it appears that
5439 the use of comma-separated lists as single arguments is common, so we
5440 had better support them. */
5445 int count = argc - recipients_arg;
5446 uschar **list = argv + recipients_arg;
5448 /* These options cannot be changed dynamically for non-SMTP messages */
5450 f.active_local_sender_retain = local_sender_retain;
5451 f.active_local_from_check = local_from_check;
5453 /* Save before any rewriting */
5455 raw_sender = string_copy(sender_address);
5457 /* Loop for each argument (supplied by user hence tainted) */
5459 for (int i = 0; i < count; i++)
5461 int start, end, domain;
5463 uschar * s = string_copy_taint(list[i], TRUE);
5465 /* Loop for each comma-separated address */
5469 BOOL finished = FALSE;
5471 uschar *ss = parse_find_address_end(s, FALSE);
5473 if (*ss == ',') *ss = 0; else finished = TRUE;
5475 /* Check max recipients - if -t was used, these aren't recipients */
5477 if (recipients_max > 0 && ++rcount > recipients_max &&
5478 !extract_recipients)
5479 if (error_handling == ERRORS_STDERR)
5481 fprintf(stderr, "exim: too many recipients\n");
5482 exim_exit(EXIT_FAILURE);
5486 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5487 errors_sender_rc : EXIT_FAILURE;
5491 BOOL b = allow_utf8_domains;
5492 allow_utf8_domains = TRUE;
5495 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5498 if (string_is_utf8(recipient))
5499 message_smtputf8 = TRUE;
5501 allow_utf8_domains = b;
5504 if (domain == 0 && !f.allow_unqualified_recipient)
5507 errmess = US"unqualified recipient address not allowed";
5511 if (error_handling == ERRORS_STDERR)
5513 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5514 string_printing(list[i]), errmess);
5515 exim_exit(EXIT_FAILURE);
5521 eblock.text1 = string_printing(list[i]);
5522 eblock.text2 = errmess;
5524 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5525 errors_sender_rc : EXIT_FAILURE;
5528 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5531 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5535 /* Show the recipients when debugging */
5539 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5540 if (recipients_list)
5542 debug_printf("Recipients:\n");
5543 for (int i = 0; i < recipients_count; i++)
5544 debug_printf(" %s\n", recipients_list[i].address);
5548 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5549 ignored; rejecting here would just add complication, and it can just as
5550 well be done later. Allow $recipients to be visible in the ACL. */
5552 if (acl_not_smtp_start)
5554 uschar *user_msg, *log_msg;
5555 f.enable_dollar_recipients = TRUE;
5556 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5557 &user_msg, &log_msg);
5558 f.enable_dollar_recipients = FALSE;
5561 /* Pause for a while waiting for input. If none received in that time,
5562 close the logfile, if we had one open; then if we wait for a long-running
5563 datasource (months, in one use-case) log rotation will not leave us holding
5566 if (!receive_timeout)
5568 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5571 FD_ZERO(&r); FD_SET(0, &r);
5572 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5575 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5576 will just read the headers for the message, and not write anything onto the
5579 message_ended = END_NOTENDED;
5580 more = receive_msg(extract_recipients);
5582 /* more is always FALSE here (not SMTP message) when reading a message
5583 for real; when reading the headers of a message for filter testing,
5584 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5586 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5587 } /* Non-SMTP message reception */
5589 /* If this is a filter testing run, there are headers in store, but
5590 no message on the spool. Run the filtering code in testing mode, setting
5591 the domain to the qualify domain and the local part to the current user,
5592 unless they have been set by options. The prefix and suffix are left unset
5593 unless specified. The the return path is set to to the sender unless it has
5594 already been set from a return-path header in the message. */
5596 if (filter_test != FTEST_NONE)
5598 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5599 deliver_domain_orig = deliver_domain;
5600 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5601 deliver_localpart_orig = deliver_localpart;
5602 deliver_localpart_prefix = ftest_prefix;
5603 deliver_localpart_suffix = ftest_suffix;
5604 deliver_home = originator_home;
5608 printf("Return-path copied from sender\n");
5609 return_path = string_copy(sender_address);
5612 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5613 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5615 receive_add_recipient(
5616 string_sprintf("%s%s%s@%s",
5617 ftest_prefix ? ftest_prefix : US"",
5619 ftest_suffix ? ftest_suffix : US"",
5620 deliver_domain), -1);
5622 printf("Recipient = %s\n", recipients_list[0].address);
5623 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5624 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5626 if (chdir("/")) /* Get away from wherever the user is running this from */
5628 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5629 exim_exit(EXIT_FAILURE);
5632 /* Now we run either a system filter test, or a user filter test, or both.
5633 In the latter case, headers added by the system filter will persist and be
5634 available to the user filter. We need to copy the filter variables
5637 if (filter_test & FTEST_SYSTEM)
5638 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5639 exim_exit(EXIT_FAILURE);
5641 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5643 if (filter_test & FTEST_USER)
5644 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5645 exim_exit(EXIT_FAILURE);
5647 exim_exit(EXIT_SUCCESS);
5650 /* Else act on the result of message reception. We should not get here unless
5651 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5652 will be TRUE. If it is not, check on the number of messages received in this
5655 if ( !session_local_queue_only
5656 && smtp_accept_queue_per_connection > 0
5657 && receive_messagecount > smtp_accept_queue_per_connection)
5659 session_local_queue_only = TRUE;
5660 queue_only_reason = 2;
5663 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5664 and queue_only_load is set, check that the load average is below it. If it is
5665 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5666 default), we put the whole session into queue_only mode. It then remains this
5667 way for any subsequent messages on the same SMTP connection. This is a
5668 deliberate choice; even though the load average may fall, it doesn't seem
5669 right to deliver later messages on the same call when not delivering earlier
5670 ones. However, there are odd cases where this is not wanted, so this can be
5671 changed by setting queue_only_load_latch false. */
5673 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5674 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5676 queue_only_reason = 3;
5677 if (queue_only_load_latch) session_local_queue_only = TRUE;
5680 /* If running as an MUA wrapper, all queueing options and freezing options
5684 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5686 /* Log the queueing here, when it will get a message id attached, but
5687 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5690 if (local_queue_only)
5692 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5693 switch(queue_only_reason)
5696 log_write(L_delay_delivery,
5697 LOG_MAIN, "no immediate delivery: more than %d messages "
5698 "received in one connection", smtp_accept_queue_per_connection);
5702 log_write(L_delay_delivery,
5703 LOG_MAIN, "no immediate delivery: load average %.2f",
5704 (double)load_average/1000.0);
5709 else if (f.queue_only_policy || f.deliver_freeze)
5710 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5712 /* Else do the delivery unless the ACL or local_scan() called for queue only
5713 or froze the message. Always deliver in a separate process. A fork failure is
5714 not a disaster, as the delivery will eventually happen on a subsequent queue
5715 run. The search cache must be tidied before the fork, as the parent will
5716 do it before exiting. The child will trigger a lookup failure and
5717 thereby defer the delivery if it tries to use (for example) a cached ldap
5718 connection that the parent has called unbind on. */
5725 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5728 close_unwanted(); /* Close unwanted file descriptors and TLS */
5729 exim_nullstd(); /* Ensure std{in,out,err} exist */
5731 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5732 mode, deliver_drop_privilege is forced TRUE). */
5734 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5736 delivery_re_exec(CEE_EXEC_EXIT);
5737 /* Control does not return here. */
5740 /* No need to re-exec */
5742 rc = deliver_message(message_id, FALSE, FALSE);
5744 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5745 ? EXIT_SUCCESS : EXIT_FAILURE);
5750 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5751 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5752 "process: %s", strerror(errno));
5756 release_cutthrough_connection(US"msg passed for delivery");
5758 /* In the parent, wait if synchronous delivery is required. This will
5759 always be the case in MUA wrapper mode. */
5761 if (f.synchronous_delivery)
5764 while (wait(&status) != pid);
5765 if ((status & 0x00ff) != 0)
5766 log_write(0, LOG_MAIN|LOG_PANIC,
5767 "process %d crashed with signal %d while delivering %s",
5768 (int)pid, status & 0x00ff, message_id);
5769 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5774 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5775 automatically reaps children (see comments above the loop), clear away any
5776 finished subprocesses here, in case there are lots of messages coming in
5777 from the same source. */
5779 #ifndef SIG_IGN_WORKS
5780 while (waitpid(-1, NULL, WNOHANG) > 0);
5784 return_path = sender_address = NULL;
5785 authenticated_sender = NULL;
5786 deliver_localpart_orig = NULL;
5787 deliver_domain_orig = NULL;
5788 deliver_host = deliver_host_address = NULL;
5789 dnslist_domain = dnslist_matched = NULL;
5790 #ifdef WITH_CONTENT_SCAN
5791 malware_name = NULL;
5793 callout_address = NULL;
5794 sending_ip_address = NULL;
5795 deliver_localpart_data = deliver_domain_data =
5796 recipient_data = sender_data = NULL;
5798 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5800 store_reset(reset_point);
5803 exim_exit(EXIT_SUCCESS); /* Never returns */
5804 return 0; /* To stop compiler warning */