1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void *block) { block = block; }
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void *block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
282 sig = sig; /* Keep picky compilers happy */
284 os_non_restarting_signal(SIGALRM, sigalrm_handler);
289 /*************************************************
290 * Sleep for a fractional time interval *
291 *************************************************/
293 /* This function is called by millisleep() and exim_wait_tick() to wait for a
294 period of time that may include a fraction of a second. The coding is somewhat
295 tedious. We do not expect setitimer() ever to fail, but if it does, the process
296 will wait for ever, so we panic in this instance. (There was a case of this
297 when a bug in a function that calls milliwait() caused it to pass invalid data.
298 That's when I added the check. :-)
300 We assume it to be not worth sleeping for under 50us; this value will
301 require revisiting as hardware advances. This avoids the issue of
302 a zero-valued timer setting meaning "never fire".
304 Argument: an itimerval structure containing the interval
309 milliwait(struct itimerval *itval)
312 sigset_t old_sigmask;
313 int save_errno = errno;
315 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
317 (void)sigemptyset(&sigmask); /* Empty mask */
318 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
319 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
320 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
321 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
322 "setitimer() failed: %s", strerror(errno));
323 (void)sigfillset(&sigmask); /* All signals */
324 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
325 (void)sigsuspend(&sigmask); /* Until SIGALRM */
326 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
328 sigalrm_seen = FALSE;
334 /*************************************************
335 * Millisecond sleep function *
336 *************************************************/
338 /* The basic sleep() function has a granularity of 1 second, which is too rough
339 in some cases - for example, when using an increasing delay to slow down
342 Argument: number of millseconds
349 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
350 .it_value = {.tv_sec = msec/1000,
351 .tv_usec = (msec % 1000) * 1000}};
357 /*************************************************
358 * Compare microsecond times *
359 *************************************************/
366 Returns: -1, 0, or +1
370 exim_tvcmp(struct timeval *t1, struct timeval *t2)
372 if (t1->tv_sec > t2->tv_sec) return +1;
373 if (t1->tv_sec < t2->tv_sec) return -1;
374 if (t1->tv_usec > t2->tv_usec) return +1;
375 if (t1->tv_usec < t2->tv_usec) return -1;
382 /*************************************************
383 * Clock tick wait function *
384 *************************************************/
386 #ifdef _POSIX_MONOTONIC_CLOCK
387 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
388 static struct timespec offset_ts;
391 exim_clock_init(void)
394 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
395 (void)gettimeofday(&tv, NULL);
396 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
397 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
398 if (offset_ts.tv_nsec >= 0) return;
400 offset_ts.tv_nsec += 1000*1000*1000;
405 /* Exim uses a time + a pid to generate a unique identifier in two places: its
406 message IDs, and in file names for maildir deliveries. Because some OS now
407 re-use pids within the same second, sub-second times are now being used.
408 However, for absolute certainty, we must ensure the clock has ticked before
409 allowing the relevant process to complete. At the time of implementation of
410 this code (February 2003), the speed of processors is such that the clock will
411 invariably have ticked already by the time a process has done its job. This
412 function prepares for the time when things are faster - and it also copes with
413 clocks that go backwards.
416 tgt_tv A timeval which was used to create uniqueness; its usec field
417 has been rounded down to the value of the resolution.
418 We want to be sure the current time is greater than this.
419 resolution The resolution that was used to divide the microseconds
420 (1 for maildir, larger for message ids)
426 exim_wait_tick(struct timeval * tgt_tv, int resolution)
428 struct timeval now_tv;
429 long int now_true_usec;
431 #ifdef _POSIX_MONOTONIC_CLOCK
432 struct timespec now_ts;
434 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
436 now_ts.tv_sec += offset_ts.tv_sec;
437 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
440 now_ts.tv_nsec -= 1000*1000*1000;
442 now_tv.tv_sec = now_ts.tv_sec;
443 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
444 now_tv.tv_usec = now_true_usec;
449 (void)gettimeofday(&now_tv, NULL);
450 now_true_usec = now_tv.tv_usec;
451 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
454 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
456 struct itimerval itval;
457 itval.it_interval.tv_sec = 0;
458 itval.it_interval.tv_usec = 0;
459 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
460 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
462 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
463 negative value for the microseconds is possible only in the case when "now"
464 is more than a second less than "tgt". That means that itval.it_value.tv_sec
465 is greater than zero. The following correction is therefore safe. */
467 if (itval.it_value.tv_usec < 0)
469 itval.it_value.tv_usec += 1000000;
470 itval.it_value.tv_sec -= 1;
473 DEBUG(D_transport|D_receive)
475 if (!f.running_in_test_harness)
477 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
478 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
479 now_tv.tv_sec, (long) now_tv.tv_usec);
480 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
481 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
487 /* Be prapared to go around if the kernel does not implement subtick
488 granularity (GNU Hurd) */
490 (void)gettimeofday(&now_tv, NULL);
491 now_true_usec = now_tv.tv_usec;
492 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
499 /*************************************************
500 * Call fopen() with umask 777 and adjust mode *
501 *************************************************/
503 /* Exim runs with umask(0) so that files created with open() have the mode that
504 is specified in the open() call. However, there are some files, typically in
505 the spool directory, that are created with fopen(). They end up world-writeable
506 if no precautions are taken. Although the spool directory is not accessible to
507 the world, this is an untidiness. So this is a wrapper function for fopen()
508 that sorts out the mode of the created file.
511 filename the file name
512 options the fopen() options
513 mode the required mode
515 Returns: the fopened FILE or NULL
519 modefopen(const uschar *filename, const char *options, mode_t mode)
521 mode_t saved_umask = umask(0777);
522 FILE *f = Ufopen(filename, options);
523 (void)umask(saved_umask);
524 if (f != NULL) (void)fchmod(fileno(f), mode);
529 /*************************************************
530 * Ensure stdin, stdout, and stderr exist *
531 *************************************************/
533 /* Some operating systems grumble if an exec() happens without a standard
534 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
535 file will be opened and will use these fd values, and then some other bit of
536 code will assume, for example, that it can write error messages to stderr.
537 This function ensures that fds 0, 1, and 2 are open if they do not already
538 exist, by connecting them to /dev/null.
540 This function is also used to ensure that std{in,out,err} exist at all times,
541 so that if any library that Exim calls tries to use them, it doesn't crash.
552 for (int i = 0; i <= 2; i++)
554 if (fstat(i, &statbuf) < 0 && errno == EBADF)
556 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
557 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
558 string_open_failed(errno, "/dev/null", NULL));
559 if (devnull != i) (void)dup2(devnull, i);
562 if (devnull > 2) (void)close(devnull);
568 /*************************************************
569 * Close unwanted file descriptors for delivery *
570 *************************************************/
572 /* This function is called from a new process that has been forked to deliver
573 an incoming message, either directly, or using exec.
575 We want any smtp input streams to be closed in this new process. However, it
576 has been observed that using fclose() here causes trouble. When reading in -bS
577 input, duplicate copies of messages have been seen. The files will be sharing a
578 file pointer with the parent process, and it seems that fclose() (at least on
579 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
580 least sometimes. Hence we go for closing the underlying file descriptors.
582 If TLS is active, we want to shut down the TLS library, but without molesting
583 the parent's SSL connection.
585 For delivery of a non-SMTP message, we want to close stdin and stdout (and
586 stderr unless debugging) because the calling process might have set them up as
587 pipes and be waiting for them to close before it waits for the submission
588 process to terminate. If they aren't closed, they hold up the calling process
589 until the initial delivery process finishes, which is not what we want.
591 Exception: We do want it for synchronous delivery!
593 And notwithstanding all the above, if D_resolver is set, implying resolver
594 debugging, leave stdout open, because that's where the resolver writes its
597 When we close stderr (which implies we've also closed stdout), we also get rid
598 of any controlling terminal.
610 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
612 (void)close(fileno(smtp_in));
613 (void)close(fileno(smtp_out));
618 (void)close(0); /* stdin */
619 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
620 if (debug_selector == 0) /* stderr */
622 if (!f.synchronous_delivery)
635 /*************************************************
637 *************************************************/
639 /* This function sets a new uid and gid permanently, optionally calling
640 initgroups() to set auxiliary groups. There are some special cases when running
641 Exim in unprivileged modes. In these situations the effective uid will not be
642 root; if we already have the right effective uid/gid, and don't need to
643 initialize any groups, leave things as they are.
648 igflag TRUE if initgroups() wanted
649 msg text to use in debugging output and failure log
651 Returns: nothing; bombs out on failure
655 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
657 uid_t euid = geteuid();
658 gid_t egid = getegid();
660 if (euid == root_uid || euid != uid || egid != gid || igflag)
662 /* At least one OS returns +1 for initgroups failure, so just check for
667 struct passwd *pw = getpwuid(uid);
669 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
670 "no passwd entry for uid=%ld", (long int)uid);
672 if (initgroups(pw->pw_name, gid) != 0)
673 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
674 (long int)uid, strerror(errno));
677 if (setgid(gid) < 0 || setuid(uid) < 0)
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
679 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
682 /* Debugging output included uid/gid and all groups */
686 int group_count, save_errno;
687 gid_t group_list[EXIM_GROUPLIST_SIZE];
688 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
689 (long int)geteuid(), (long int)getegid(), (long int)getpid());
690 group_count = getgroups(nelem(group_list), group_list);
692 debug_printf(" auxiliary group list:");
694 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
695 else if (group_count < 0)
696 debug_printf(" <error: %s>", strerror(save_errno));
697 else debug_printf(" <none>");
705 /*************************************************
707 *************************************************/
709 /* Exim exits via this function so that it always clears up any open
715 Returns: does not return
724 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
725 ">>>>>>>>>>>>>>>>\n",
726 (int)getpid(), process_purpose, rc);
732 exim_underbar_exit(int rc)
736 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
737 ">>>>>>>>>>>>>>>>\n",
738 (int)getpid(), process_purpose, rc);
744 /* Print error string, then die */
746 exim_fail(const char * fmt, ...)
750 vfprintf(stderr, fmt, ap);
754 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
755 of chown()/fchown(). See src/functions.h for more explanation */
757 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
759 int saved_errno = errno; /* from the preceeding chown call */
761 log_write(0, LOG_MAIN|LOG_PANIC,
762 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
763 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
764 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
766 /* I leave this here, commented, in case the "bug"(?) comes up again.
767 It is not an Exim bug, but we can provide a workaround.
773 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
775 if (buf.st_uid == owner && buf.st_gid == group) return 0;
776 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
778 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
786 /*************************************************
787 * Extract port from host address *
788 *************************************************/
790 /* Called to extract the port from the values given to -oMa and -oMi.
791 It also checks the syntax of the address, and terminates it before the
792 port data when a port is extracted.
795 address the address, with possible port on the end
797 Returns: the port, or zero if there isn't one
798 bombs out on a syntax error
802 check_port(uschar *address)
804 int port = host_address_extract_port(address);
805 if (string_is_ip_address(address, NULL) == 0)
806 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
812 /*************************************************
813 * Test/verify an address *
814 *************************************************/
816 /* This function is called by the -bv and -bt code. It extracts a working
817 address from a full RFC 822 address. This isn't really necessary per se, but it
818 has the effect of collapsing source routes.
822 flags flag bits for verify_address()
823 exit_value to be set for failures
829 test_address(uschar *s, int flags, int *exit_value)
831 int start, end, domain;
832 uschar *parse_error = NULL;
833 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
837 fprintf(stdout, "syntax error: %s\n", parse_error);
842 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
843 -1, -1, NULL, NULL, NULL);
844 if (rc == FAIL) *exit_value = 2;
845 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
851 /*************************************************
852 * Show supported features *
853 *************************************************/
856 show_db_version(FILE * f)
858 #ifdef DB_VERSION_STRING
861 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
862 fprintf(f, " Runtime: %s\n",
863 db_version(NULL, NULL, NULL));
866 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
868 #elif defined(BTREEVERSION) && defined(HASHVERSION)
870 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
872 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
875 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
876 fprintf(f, "Probably ndbm\n");
877 #elif defined(USE_TDB)
878 fprintf(f, "Using tdb\n");
881 fprintf(f, "Probably GDBM (native mode)\n");
883 fprintf(f, "Probably GDBM (compatibility mode)\n");
889 /* This function is called for -bV/--version and for -d to output the optional
890 features of the current Exim binary.
892 Arguments: a FILE for printing
897 show_whats_supported(FILE * fp)
899 rmark reset_point = store_mark();
901 DEBUG(D_any) {} else show_db_version(fp);
903 g = string_cat(NULL, US"Support for:");
904 #ifdef SUPPORT_CRYPTEQ
905 g = string_cat(g, US" crypteq");
908 g = string_cat(g, US" iconv()");
911 g = string_cat(g, US" IPv6");
913 #ifdef HAVE_SETCLASSRESOURCES
914 g = string_cat(g, US" use_setclassresources");
917 g = string_cat(g, US" PAM");
920 g = string_cat(g, US" Perl");
923 g = string_cat(g, US" Expand_dlfunc");
925 #ifdef USE_TCP_WRAPPERS
926 g = string_cat(g, US" TCPwrappers");
929 g = string_cat(g, US" GnuTLS");
932 g = string_cat(g, US" OpenSSL");
934 #ifndef DISABLE_TLS_RESUME
935 g = string_cat(g, US" TLS_resume");
937 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
938 g = string_cat(g, US" translate_ip_address");
940 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
941 g = string_cat(g, US" move_frozen_messages");
943 #ifdef WITH_CONTENT_SCAN
944 g = string_cat(g, US" Content_Scanning");
947 g = string_cat(g, US" DANE");
950 g = string_cat(g, US" DKIM");
953 g = string_cat(g, US" DMARC");
955 #ifndef DISABLE_DNSSEC
956 g = string_cat(g, US" DNSSEC");
958 #ifndef DISABLE_EVENT
959 g = string_cat(g, US" Event");
962 g = string_cat(g, US" I18N");
965 g = string_cat(g, US" OCSP");
967 #ifndef DISABLE_PIPE_CONNECT
968 g = string_cat(g, US" PIPE_CONNECT");
971 g = string_cat(g, US" PRDR");
974 g = string_cat(g, US" PROXY");
976 #ifndef DISABLE_QUEUE_RAMP
977 g = string_cat(g, US" Experimental_Queue_Ramp");
980 g = string_cat(g, US" SOCKS");
983 g = string_cat(g, US" SPF");
985 #if defined(SUPPORT_SRS)
986 g = string_cat(g, US" SRS");
990 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
992 #ifdef EXPERIMENTAL_ARC
993 g = string_cat(g, US" Experimental_ARC");
995 #ifdef EXPERIMENTAL_BRIGHTMAIL
996 g = string_cat(g, US" Experimental_Brightmail");
998 #ifdef EXPERIMENTAL_DCC
999 g = string_cat(g, US" Experimental_DCC");
1001 #ifdef EXPERIMENTAL_DSN_INFO
1002 g = string_cat(g, US" Experimental_DSN_info");
1004 #ifdef EXPERIMENTAL_QUEUEFILE
1005 g = string_cat(g, US" Experimental_QUEUEFILE");
1007 #if defined(EXPERIMENTAL_SRS_ALT)
1008 g = string_cat(g, US" Experimental_SRS");
1010 g = string_cat(g, US"\n");
1012 g = string_cat(g, US"Lookups (built-in):");
1013 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1014 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1016 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1017 g = string_cat(g, US" cdb");
1019 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1020 g = string_cat(g, US" dbm dbmjz dbmnz");
1022 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1023 g = string_cat(g, US" dnsdb");
1025 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1026 g = string_cat(g, US" dsearch");
1028 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1029 g = string_cat(g, US" ibase");
1031 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1032 g = string_cat(g, US" json");
1034 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1035 g = string_cat(g, US" ldap ldapdn ldapm");
1038 g = string_cat(g, US" lmdb");
1040 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1041 g = string_cat(g, US" mysql");
1043 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1044 g = string_cat(g, US" nis nis0");
1046 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1047 g = string_cat(g, US" nisplus");
1049 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1050 g = string_cat(g, US" oracle");
1052 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1053 g = string_cat(g, US" passwd");
1055 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1056 g = string_cat(g, US" pgsql");
1058 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1059 g = string_cat(g, US" redis");
1061 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1062 g = string_cat(g, US" sqlite");
1064 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1065 g = string_cat(g, US" testdb");
1067 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1068 g = string_cat(g, US" whoson");
1070 g = string_cat(g, US"\n");
1072 g = auth_show_supported(g);
1073 g = route_show_supported(g);
1074 g = transport_show_supported(g);
1076 #ifdef WITH_CONTENT_SCAN
1077 g = malware_show_supported(g);
1080 if (fixed_never_users[0] > 0)
1083 g = string_cat(g, US"Fixed never_users: ");
1084 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1085 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1086 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1089 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1090 fputs(CS string_from_gstring(g), fp);
1092 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1094 /* Everything else is details which are only worth reporting when debugging.
1095 Perhaps the tls_version_report should move into this too. */
1098 /* clang defines __GNUC__ (at least, for me) so test for it first */
1099 #if defined(__clang__)
1100 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1101 #elif defined(__GNUC__)
1102 fprintf(fp, "Compiler: GCC [%s]\n",
1106 "? unknown version ?"
1110 fprintf(fp, "Compiler: <unknown>\n");
1113 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1114 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1115 __GLIBC__, __GLIBC_MINOR__);
1116 if (__GLIBC_PREREQ(2, 1))
1117 fprintf(fp, " Runtime: %s\n",
1118 gnu_get_libc_version());
1121 show_db_version(fp);
1124 tls_version_report(fp);
1127 utf8_version_report(fp);
1130 spf_lib_version_report(fp);
1133 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1134 if (authi->version_report)
1135 (*authi->version_report)(fp);
1137 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1138 characters; unless it's an ancient version of PCRE in which case it
1140 #ifndef PCRE_PRERELEASE
1141 # define PCRE_PRERELEASE
1144 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1145 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1147 PCRE_MAJOR, PCRE_MINOR,
1148 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1151 #undef EXPAND_AND_QUOTE
1154 for (int i = 0; i < lookup_list_count; i++)
1155 if (lookup_list[i]->version_report)
1156 lookup_list[i]->version_report(fp);
1158 #ifdef WHITELIST_D_MACROS
1159 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1161 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1163 #ifdef TRUSTED_CONFIG_LIST
1164 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1166 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1170 store_reset(reset_point);
1174 /*************************************************
1175 * Show auxiliary information about Exim *
1176 *************************************************/
1179 show_exim_information(enum commandline_info request, FILE *stream)
1184 fprintf(stream, "Oops, something went wrong.\n");
1188 "The -bI: flag takes a string indicating which information to provide.\n"
1189 "If the string is not recognised, you'll get this help (on stderr).\n"
1191 " exim -bI:help this information\n"
1192 " exim -bI:dscp list of known dscp value keywords\n"
1193 " exim -bI:sieve list of supported sieve extensions\n"
1197 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1198 fprintf(stream, "%s\n", *pp);
1201 dscp_list_to_stream(stream);
1207 /*************************************************
1208 * Quote a local part *
1209 *************************************************/
1211 /* This function is used when a sender address or a From: or Sender: header
1212 line is being created from the caller's login, or from an authenticated_id. It
1213 applies appropriate quoting rules for a local part.
1215 Argument: the local part
1216 Returns: the local part, quoted if necessary
1220 local_part_quote(uschar *lpart)
1222 BOOL needs_quote = FALSE;
1225 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1227 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1228 (*t != '.' || t == lpart || t[1] == 0);
1231 if (!needs_quote) return lpart;
1233 g = string_catn(NULL, US"\"", 1);
1237 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1240 g = string_cat(g, lpart);
1243 g = string_catn(g, lpart, nq - lpart);
1244 g = string_catn(g, US"\\", 1);
1245 g = string_catn(g, nq, 1);
1249 g = string_catn(g, US"\"", 1);
1250 return string_from_gstring(g);
1256 /*************************************************
1257 * Load readline() functions *
1258 *************************************************/
1260 /* This function is called from testing executions that read data from stdin,
1261 but only when running as the calling user. Currently, only -be does this. The
1262 function loads the readline() function library and passes back the functions.
1263 On some systems, it needs the curses library, so load that too, but try without
1264 it if loading fails. All this functionality has to be requested at build time.
1267 fn_readline_ptr pointer to where to put the readline pointer
1268 fn_addhist_ptr pointer to where to put the addhistory function
1270 Returns: the dlopen handle or NULL on failure
1274 set_readline(char * (**fn_readline_ptr)(const char *),
1275 void (**fn_addhist_ptr)(const char *))
1278 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1280 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1281 if (dlhandle_curses) dlclose(dlhandle_curses);
1285 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1286 * char * readline (const char *prompt);
1287 * void add_history (const char *string);
1289 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1290 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1293 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1301 /*************************************************
1302 * Get a line from stdin for testing things *
1303 *************************************************/
1305 /* This function is called when running tests that can take a number of lines
1306 of input (for example, -be and -bt). It handles continuations and trailing
1307 spaces. And prompting and a blank line output on eof. If readline() is in use,
1308 the arguments are non-NULL and provide the relevant functions.
1311 fn_readline readline function or NULL
1312 fn_addhist addhist function or NULL
1314 Returns: pointer to dynamic memory, or NULL at end of file
1318 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1322 if (!fn_readline) { printf("> "); fflush(stdout); }
1324 for (int i = 0;; i++)
1326 uschar buffer[1024];
1330 char *readline_line = NULL;
1333 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1334 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1335 p = US readline_line;
1340 /* readline() not in use */
1343 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1347 /* Handle the line */
1349 ss = p + (int)Ustrlen(p);
1350 while (ss > p && isspace(ss[-1])) ss--;
1353 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1355 g = string_catn(g, p, ss - p);
1358 if (fn_readline) free(readline_line);
1361 /* g can only be NULL if ss==p */
1362 if (ss == p || g->s[g->ptr-1] != '\\')
1366 (void) string_from_gstring(g);
1369 if (!g) printf("\n");
1370 return string_from_gstring(g);
1375 /*************************************************
1376 * Output usage information for the program *
1377 *************************************************/
1379 /* This function is called when there are no recipients
1380 or a specific --help argument was added.
1383 progname information on what name we were called by
1385 Returns: DOES NOT RETURN
1389 exim_usage(uschar *progname)
1392 /* Handle specific program invocation variants */
1393 if (Ustrcmp(progname, US"-mailq") == 0)
1395 "mailq - list the contents of the mail queue\n\n"
1396 "For a list of options, see the Exim documentation.\n");
1398 /* Generic usage - we output this whatever happens */
1400 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1401 "not directly from a shell command line. Options and/or arguments control\n"
1402 "what it does when called. For a list of options, see the Exim documentation.\n");
1407 /*************************************************
1408 * Validate that the macros given are okay *
1409 *************************************************/
1411 /* Typically, Exim will drop privileges if macros are supplied. In some
1412 cases, we want to not do so.
1414 Arguments: opt_D_used - true if the commandline had a "-D" option
1415 Returns: true if trusted, false otherwise
1419 macros_trusted(BOOL opt_D_used)
1421 #ifdef WHITELIST_D_MACROS
1422 uschar *whitelisted, *end, *p, **whites;
1423 int white_count, i, n;
1425 BOOL prev_char_item, found;
1430 #ifndef WHITELIST_D_MACROS
1434 /* We only trust -D overrides for some invoking users:
1435 root, the exim run-time user, the optional config owner user.
1436 I don't know why config-owner would be needed, but since they can own the
1437 config files anyway, there's no security risk to letting them override -D. */
1438 if ( ! ((real_uid == root_uid)
1439 || (real_uid == exim_uid)
1440 #ifdef CONFIGURE_OWNER
1441 || (real_uid == config_uid)
1445 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1449 /* Get a list of macros which are whitelisted */
1450 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1451 prev_char_item = FALSE;
1453 for (p = whitelisted; *p != '\0'; ++p)
1455 if (*p == ':' || isspace(*p))
1460 prev_char_item = FALSE;
1463 if (!prev_char_item)
1464 prev_char_item = TRUE;
1471 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1472 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1477 if (i == white_count)
1479 while (*p != '\0' && p < end)
1485 /* The list of commandline macros should be very short.
1486 Accept the N*M complexity. */
1487 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1490 for (uschar ** w = whites; *w; ++w)
1491 if (Ustrcmp(*w, m->name) == 0)
1498 if (!m->replacement)
1500 if ((len = m->replen) == 0)
1502 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1503 0, PCRE_EOPT, NULL, 0);
1506 if (n != PCRE_ERROR_NOMATCH)
1507 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1511 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1517 /*************************************************
1518 * Expansion testing *
1519 *************************************************/
1521 /* Expand and print one item, doing macro-processing.
1524 item line for expansion
1528 expansion_test_line(uschar * line)
1533 Ustrncpy(big_buffer, line, big_buffer_size);
1534 big_buffer[big_buffer_size-1] = '\0';
1535 len = Ustrlen(big_buffer);
1537 (void) macros_expand(0, &len, &dummy_macexp);
1539 if (isupper(big_buffer[0]))
1541 if (macro_read_assignment(big_buffer))
1542 printf("Defined macro '%s'\n", mlast->name);
1545 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1546 else printf("Failed: %s\n", expand_string_message);
1551 /*************************************************
1552 * Entry point and high-level code *
1553 *************************************************/
1555 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1556 the appropriate action. All the necessary functions are present in the one
1557 binary. I originally thought one should split it up, but it turns out that so
1558 much of the apparatus is needed in each chunk that one might as well just have
1559 it all available all the time, which then makes the coding easier as well.
1562 argc count of entries in argv
1563 argv argument strings, with argv[0] being the program name
1565 Returns: EXIT_SUCCESS if terminated successfully
1566 EXIT_FAILURE otherwise, except when a message has been sent
1567 to the sender, and -oee was given
1571 main(int argc, char **cargv)
1573 uschar **argv = USS cargv;
1574 int arg_receive_timeout = -1;
1575 int arg_smtp_receive_timeout = -1;
1576 int arg_error_handling = error_handling;
1577 int filter_sfd = -1;
1578 int filter_ufd = -1;
1581 int list_queue_option = 0;
1583 int msg_action_arg = -1;
1584 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1585 int queue_only_reason = 0;
1587 int perl_start_option = 0;
1589 int recipients_arg = argc;
1590 int sender_address_domain = 0;
1591 int test_retry_arg = -1;
1592 int test_rewrite_arg = -1;
1593 gid_t original_egid;
1594 BOOL arg_queue_only = FALSE;
1595 BOOL bi_option = FALSE;
1596 BOOL checking = FALSE;
1597 BOOL count_queue = FALSE;
1598 BOOL expansion_test = FALSE;
1599 BOOL extract_recipients = FALSE;
1600 BOOL flag_G = FALSE;
1601 BOOL flag_n = FALSE;
1602 BOOL forced_delivery = FALSE;
1603 BOOL f_end_dot = FALSE;
1604 BOOL deliver_give_up = FALSE;
1605 BOOL list_queue = FALSE;
1606 BOOL list_options = FALSE;
1607 BOOL list_config = FALSE;
1608 BOOL local_queue_only;
1610 BOOL one_msg_action = FALSE;
1611 BOOL opt_D_used = FALSE;
1612 BOOL queue_only_set = FALSE;
1613 BOOL receiving_message = TRUE;
1614 BOOL sender_ident_set = FALSE;
1615 BOOL session_local_queue_only;
1617 BOOL removed_privilege = FALSE;
1618 BOOL usage_wanted = FALSE;
1619 BOOL verify_address_mode = FALSE;
1620 BOOL verify_as_sender = FALSE;
1621 BOOL rcpt_verify_quota = FALSE;
1622 BOOL version_printed = FALSE;
1623 uschar *alias_arg = NULL;
1624 uschar *called_as = US"";
1625 uschar *cmdline_syslog_name = NULL;
1626 uschar *start_queue_run_id = NULL;
1627 uschar *stop_queue_run_id = NULL;
1628 uschar *expansion_test_message = NULL;
1629 uschar *ftest_domain = NULL;
1630 uschar *ftest_localpart = NULL;
1631 uschar *ftest_prefix = NULL;
1632 uschar *ftest_suffix = NULL;
1633 uschar *log_oneline = NULL;
1634 uschar *malware_test_file = NULL;
1635 uschar *real_sender_address;
1636 uschar *originator_home = US"/";
1640 struct stat statbuf;
1641 pid_t passed_qr_pid = (pid_t)0;
1642 int passed_qr_pipe = -1;
1643 gid_t group_list[EXIM_GROUPLIST_SIZE];
1645 /* For the -bI: flag */
1646 enum commandline_info info_flag = CMDINFO_NONE;
1647 BOOL info_stdout = FALSE;
1649 /* Possible options for -R and -S */
1651 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1653 /* Need to define this in case we need to change the environment in order
1654 to get rid of a bogus time zone. We have to make it char rather than uschar
1655 because some OS define it in /usr/include/unistd.h. */
1657 extern char **environ;
1659 #ifdef MEASURE_TIMING
1660 (void)gettimeofday(×tamp_startup, NULL);
1663 /* If the Exim user and/or group and/or the configuration file owner/group were
1664 defined by ref:name at build time, we must now find the actual uid/gid values.
1665 This is a feature to make the lives of binary distributors easier. */
1667 #ifdef EXIM_USERNAME
1668 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1671 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1673 /* If ref:name uses a number as the name, route_finduser() returns
1674 TRUE with exim_uid set and pw coerced to NULL. */
1676 exim_gid = pw->pw_gid;
1677 #ifndef EXIM_GROUPNAME
1680 "exim: ref:name should specify a usercode, not a group.\n"
1681 "exim: can't let you get away with it unless you also specify a group.\n");
1685 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1688 #ifdef EXIM_GROUPNAME
1689 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1690 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1693 #ifdef CONFIGURE_OWNERNAME
1694 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1695 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1696 CONFIGURE_OWNERNAME);
1699 /* We default the system_filter_user to be the Exim run-time user, as a
1700 sane non-root value. */
1701 system_filter_uid = exim_uid;
1703 #ifdef CONFIGURE_GROUPNAME
1704 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1705 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1706 CONFIGURE_GROUPNAME);
1709 /* In the Cygwin environment, some initialization used to need doing.
1710 It was fudged in by means of this macro; now no longer but we'll leave
1711 it in case of others. */
1717 /* Check a field which is patched when we are running Exim within its
1718 testing harness; do a fast initial check, and then the whole thing. */
1720 f.running_in_test_harness =
1721 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1722 if (f.running_in_test_harness)
1725 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1726 at the start of a program; however, it seems that some environments do not
1727 follow this. A "strange" locale can affect the formatting of timestamps, so we
1730 setlocale(LC_ALL, "C");
1732 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1734 #ifdef _POSIX_MONOTONIC_CLOCK
1738 /* Set up the default handler for timing using alarm(). */
1740 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1742 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1743 because store_malloc writes a log entry on failure. */
1745 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1746 exim_fail("exim: failed to get store for log buffer\n");
1748 /* Initialize the default log options. */
1750 bits_set(log_selector, log_selector_size, log_default);
1752 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1753 NULL when the daemon is run and the file is closed. We have to use this
1754 indirection, because some systems don't allow writing to the variable "stderr".
1757 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1759 /* Arrange for the PCRE regex library to use our store functions. Note that
1760 the normal calls are actually macros that add additional arguments for
1761 debugging purposes so we have to assign specially constructed functions here.
1762 The default is to use store in the stacking pool, but this is overridden in the
1763 regex_must_compile() function. */
1765 pcre_malloc = function_store_get;
1766 pcre_free = function_dummy_free;
1768 /* Ensure there is a big buffer for temporary use in several places. It is put
1769 in malloc store so that it can be freed for enlargement if necessary. */
1771 big_buffer = store_malloc(big_buffer_size);
1773 /* Set up the handler for the data request signal, and set the initial
1774 descriptive text. */
1776 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1777 set_process_info("initializing");
1778 os_restarting_signal(SIGUSR1, usr1_handler);
1780 /* If running in a dockerized environment, the TERM signal is only
1781 delegated to the PID 1 if we request it by setting an signal handler */
1782 if (getpid() == 1) signal(SIGTERM, term_handler);
1784 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1785 in the daemon code. For the rest of Exim's uses, we ignore it. */
1787 signal(SIGHUP, SIG_IGN);
1789 /* We don't want to die on pipe errors as the code is written to handle
1790 the write error instead. */
1792 signal(SIGPIPE, SIG_IGN);
1794 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1795 set to SIG_IGN. This causes subprocesses that complete before the parent
1796 process waits for them not to hang around, so when Exim calls wait(), nothing
1797 is there. The wait() code has been made robust against this, but let's ensure
1798 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1799 ending status. We use sigaction rather than plain signal() on those OS where
1800 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1801 problem on AIX with this.) */
1805 struct sigaction act;
1806 act.sa_handler = SIG_DFL;
1807 sigemptyset(&(act.sa_mask));
1809 sigaction(SIGCHLD, &act, NULL);
1812 signal(SIGCHLD, SIG_DFL);
1815 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1820 /* Set up the version number. Set up the leading 'E' for the external form of
1821 message ids, set the pointer to the internal form, and initialize it to
1822 indicate no message being processed. */
1825 message_id_option[0] = '-';
1826 message_id_external = message_id_option + 1;
1827 message_id_external[0] = 'E';
1828 message_id = message_id_external + 1;
1831 /* Set the umask to zero so that any files Exim creates using open() are
1832 created with the modes that it specifies. NOTE: Files created with fopen() have
1833 a problem, which was not recognized till rather late (February 2006). With this
1834 umask, such files will be world writeable. (They are all content scanning files
1835 in the spool directory, which isn't world-accessible, so this is not a
1836 disaster, but it's untidy.) I don't want to change this overall setting,
1837 however, because it will interact badly with the open() calls. Instead, there's
1838 now a function called modefopen() that fiddles with the umask while calling
1843 /* Precompile the regular expression for matching a message id. Keep this in
1844 step with the code that generates ids in the accept.c module. We need to do
1845 this here, because the -M options check their arguments for syntactic validity
1846 using mac_ismsgid, which uses this. */
1849 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1851 /* Precompile the regular expression that is used for matching an SMTP error
1852 code, possibly extended, at the start of an error message. Note that the
1853 terminating whitespace character is included. */
1856 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1859 #ifdef WHITELIST_D_MACROS
1860 /* Precompile the regular expression used to filter the content of macros
1861 given to -D for permissibility. */
1863 regex_whitelisted_macro =
1864 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1867 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1869 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1870 this seems to be a generally accepted convention, since one finds symbolic
1871 links called "mailq" in standard OS configurations. */
1873 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1874 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1877 receiving_message = FALSE;
1878 called_as = US"-mailq";
1881 /* If the program is called as "rmail" treat it as equivalent to
1882 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1883 i.e. preventing a single dot on a line from terminating the message, and
1884 returning with zero return code, even in cases of error (provided an error
1885 message has been sent). */
1887 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1888 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1891 called_as = US"-rmail";
1892 errors_sender_rc = EXIT_SUCCESS;
1895 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1896 this is a smail convention. */
1898 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1899 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1901 smtp_input = smtp_batched_input = TRUE;
1902 called_as = US"-rsmtp";
1905 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1906 this is a smail convention. */
1908 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1909 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1912 receiving_message = FALSE;
1913 called_as = US"-runq";
1916 /* If the program is called as "newaliases" treat it as equivalent to
1917 "exim -bi"; this is a sendmail convention. */
1919 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1920 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1923 receiving_message = FALSE;
1924 called_as = US"-newaliases";
1927 /* Save the original effective uid for a couple of uses later. It should
1928 normally be root, but in some esoteric environments it may not be. */
1930 original_euid = geteuid();
1931 original_egid = getegid();
1933 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1934 to be the same as the real ones. This makes a difference only if Exim is setuid
1935 (or setgid) to something other than root, which could be the case in some
1936 special configurations. */
1938 real_uid = getuid();
1939 real_gid = getgid();
1941 if (real_uid == root_uid)
1943 if ((rv = setgid(real_gid)))
1944 exim_fail("exim: setgid(%ld) failed: %s\n",
1945 (long int)real_gid, strerror(errno));
1946 if ((rv = setuid(real_uid)))
1947 exim_fail("exim: setuid(%ld) failed: %s\n",
1948 (long int)real_uid, strerror(errno));
1951 /* If neither the original real uid nor the original euid was root, Exim is
1952 running in an unprivileged state. */
1954 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1956 /* For most of the args-parsing we need to use permanent pool memory */
1958 int old_pool = store_pool;
1959 store_pool = POOL_PERM;
1961 /* Scan the program's arguments. Some can be dealt with right away; others are
1962 simply recorded for checking and handling afterwards. Do a high-level switch
1963 on the second character (the one after '-'), to save some effort. */
1965 for (i = 1; i < argc; i++)
1967 BOOL badarg = FALSE;
1968 uschar * arg = argv[i];
1972 /* An argument not starting with '-' is the start of a recipients list;
1973 break out of the options-scanning loop. */
1981 /* An option consisting of -- terminates the options */
1983 if (Ustrcmp(arg, "--") == 0)
1985 recipients_arg = i + 1;
1989 /* Handle flagged options */
1991 switchchar = arg[1];
1994 /* Make all -ex options synonymous with -oex arguments, since that
1995 is assumed by various callers. Also make -qR options synonymous with -R
1996 options, as that seems to be required as well. Allow for -qqR too, and
1997 the same for -S options. */
1999 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2000 Ustrncmp(arg+1, "qR", 2) == 0 ||
2001 Ustrncmp(arg+1, "qS", 2) == 0)
2003 switchchar = arg[2];
2006 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2008 switchchar = arg[3];
2010 f.queue_2stage = TRUE;
2013 /* Make -r synonymous with -f, since it is a documented alias */
2015 else if (arg[1] == 'r') switchchar = 'f';
2017 /* Make -ov synonymous with -v */
2019 else if (Ustrcmp(arg, "-ov") == 0)
2025 /* deal with --option_aliases */
2026 else if (switchchar == '-')
2028 if (Ustrcmp(argrest, "help") == 0)
2030 usage_wanted = TRUE;
2033 else if (Ustrcmp(argrest, "version") == 0)
2040 /* High-level switch on active initial letter */
2045 /* sendmail uses -Ac and -Am to control which .cf file is used;
2048 if (!*argrest) { badarg = TRUE; break; }
2051 BOOL ignore = FALSE;
2056 if (*(argrest + 1) == '\0')
2060 if (!ignore) badarg = TRUE;
2064 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2065 so has no need of it. */
2068 if (!*argrest) i++; /* Skip over the type */
2074 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2078 /* -bd: Run in daemon mode, awaiting SMTP connections.
2079 -bdf: Ditto, but in the foreground.
2082 f.daemon_listen = TRUE;
2083 if (*argrest == 'f') f.background_daemon = FALSE;
2084 else if (*argrest) badarg = TRUE;
2087 /* -be: Run in expansion test mode
2088 -bem: Ditto, but read a message from a file first
2091 expansion_test = checking = TRUE;
2092 if (*argrest == 'm')
2094 if (++i >= argc) { badarg = TRUE; break; }
2095 expansion_test_message = argv[i];
2098 if (*argrest) badarg = TRUE;
2101 /* -bF: Run system filter test */
2103 filter_test |= checking = FTEST_SYSTEM;
2104 if (*argrest) badarg = TRUE;
2105 else if (++i < argc) filter_test_sfile = argv[i];
2106 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2109 /* -bf: Run user filter test
2110 -bfd: Set domain for filter testing
2111 -bfl: Set local part for filter testing
2112 -bfp: Set prefix for filter testing
2113 -bfs: Set suffix for filter testing
2118 filter_test |= checking = FTEST_USER;
2119 if (++i < argc) filter_test_ufile = argv[i];
2120 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2125 exim_fail("exim: string expected after %s\n", arg);
2126 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2127 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2128 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2129 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2134 /* -bh: Host checking - an IP address must follow. */
2136 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2138 if (++i >= argc) { badarg = TRUE; break; }
2139 sender_host_address = string_copy_taint(argv[i], TRUE);
2140 host_checking = checking = f.log_testing_mode = TRUE;
2141 f.host_checking_callout = *argrest == 'c';
2142 message_logs = FALSE;
2147 /* -bi: This option is used by sendmail to initialize *the* alias file,
2148 though it has the -oA option to specify a different file. Exim has no
2149 concept of *the* alias file, but since Sun's YP make script calls
2150 sendmail this way, some support must be provided. */
2152 if (!*argrest) bi_option = TRUE;
2156 /* -bI: provide information, of the type to follow after a colon.
2157 This is an Exim flag. */
2159 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2161 uschar *p = argrest+1;
2162 info_flag = CMDINFO_HELP;
2164 if (strcmpic(p, CUS"sieve") == 0)
2166 info_flag = CMDINFO_SIEVE;
2169 else if (strcmpic(p, CUS"dscp") == 0)
2171 info_flag = CMDINFO_DSCP;
2174 else if (strcmpic(p, CUS"help") == 0)
2180 /* -bm: Accept and deliver message - the default option. Reinstate
2181 receiving_message, which got turned off for all -b options.
2182 -bmalware: test the filename given for malware */
2184 if (!*argrest) receiving_message = TRUE;
2185 else if (Ustrcmp(argrest, "alware") == 0)
2187 if (++i >= argc) { badarg = TRUE; break; }
2189 malware_test_file = argv[i];
2194 /* -bnq: For locally originating messages, do not qualify unqualified
2195 addresses. In the envelope, this causes errors; in header lines they
2198 if (Ustrcmp(argrest, "q") == 0)
2200 f.allow_unqualified_sender = FALSE;
2201 f.allow_unqualified_recipient = FALSE;
2206 /* -bpxx: List the contents of the mail queue, in various forms. If
2207 the option is -bpc, just a queue count is needed. Otherwise, if the
2208 first letter after p is r, then order is random. */
2210 if (*argrest == 'c')
2213 if (*++argrest) badarg = TRUE;
2217 if (*argrest == 'r')
2219 list_queue_option = 8;
2222 else list_queue_option = 0;
2226 /* -bp: List the contents of the mail queue, top-level only */
2230 /* -bpu: List the contents of the mail queue, top-level undelivered */
2232 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2234 /* -bpa: List the contents of the mail queue, including all delivered */
2236 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2238 /* Unknown after -bp[r] */
2244 /* -bP: List the configuration variables given as the address list.
2245 Force -v, so configuration errors get displayed. */
2248 /* -bP config: we need to setup here, because later,
2249 * when list_options is checked, the config is read already */
2252 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2255 readconf_save_config(version_string);
2259 list_options = TRUE;
2260 debug_selector |= D_v;
2261 debug_file = stderr;
2265 /* -brt: Test retry configuration lookup */
2267 if (Ustrcmp(argrest, "t") == 0)
2270 test_retry_arg = i + 1;
2274 /* -brw: Test rewrite configuration */
2276 else if (Ustrcmp(argrest, "w") == 0)
2279 test_rewrite_arg = i + 1;
2285 /* -bS: Read SMTP commands on standard input, but produce no replies -
2286 all errors are reported by sending messages. */
2289 smtp_input = smtp_batched_input = receiving_message = TRUE;
2293 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2294 on standard output. */
2296 if (!*argrest) smtp_input = receiving_message = TRUE;
2300 /* -bt: address testing mode */
2303 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2307 /* -bv: verify addresses */
2310 verify_address_mode = checking = f.log_testing_mode = TRUE;
2312 /* -bvs: verify sender addresses */
2314 else if (Ustrcmp(argrest, "s") == 0)
2316 verify_address_mode = checking = f.log_testing_mode = TRUE;
2317 verify_as_sender = TRUE;
2322 /* -bV: Print version string and support details */
2326 printf("Exim version %s #%s built %s\n", version_string,
2327 version_cnumber, version_date);
2328 printf("%s\n", CS version_copyright);
2329 version_printed = TRUE;
2330 show_whats_supported(stdout);
2331 f.log_testing_mode = TRUE;
2336 /* -bw: inetd wait mode, accept a listening socket as stdin */
2338 f.inetd_wait_mode = TRUE;
2339 f.background_daemon = FALSE;
2340 f.daemon_listen = TRUE;
2342 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2343 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2354 /* -C: change configuration file list; ignore if it isn't really
2355 a change! Enforce a prefix check if required. */
2359 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2360 if (Ustrcmp(config_main_filelist, argrest) != 0)
2362 #ifdef ALT_CONFIG_PREFIX
2364 int len = Ustrlen(ALT_CONFIG_PREFIX);
2365 const uschar *list = argrest;
2367 while((filename = string_nextinlist(&list, &sep, big_buffer,
2369 if ( ( Ustrlen(filename) < len
2370 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2371 || Ustrstr(filename, "/../") != NULL
2373 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2375 exim_fail("-C Permission denied\n");
2377 if (real_uid != root_uid)
2379 #ifdef TRUSTED_CONFIG_LIST
2381 if (real_uid != exim_uid
2382 #ifdef CONFIGURE_OWNER
2383 && real_uid != config_uid
2386 f.trusted_config = FALSE;
2389 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2392 struct stat statbuf;
2394 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2395 (statbuf.st_uid != root_uid /* owner not root */
2396 #ifdef CONFIGURE_OWNER
2397 && statbuf.st_uid != config_uid /* owner not the special one */
2400 (statbuf.st_gid != root_gid /* group not root */
2401 #ifdef CONFIGURE_GROUP
2402 && statbuf.st_gid != config_gid /* group not the special one */
2404 && (statbuf.st_mode & 020) != 0 /* group writeable */
2406 (statbuf.st_mode & 2) != 0) /* world writeable */
2408 f.trusted_config = FALSE;
2413 /* Well, the trust list at least is up to scratch... */
2415 uschar *trusted_configs[32];
2418 int old_pool = store_pool;
2419 store_pool = POOL_MAIN;
2421 reset_point = store_mark();
2422 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2424 uschar *start = big_buffer, *nl;
2425 while (*start && isspace(*start))
2429 nl = Ustrchr(start, '\n');
2432 trusted_configs[nr_configs++] = string_copy(start);
2433 if (nr_configs == nelem(trusted_configs))
2441 const uschar *list = argrest;
2443 while (f.trusted_config && (filename = string_nextinlist(&list,
2444 &sep, big_buffer, big_buffer_size)))
2446 for (i=0; i < nr_configs; i++)
2447 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2449 if (i == nr_configs)
2451 f.trusted_config = FALSE;
2456 else /* No valid prefixes found in trust_list file. */
2457 f.trusted_config = FALSE;
2458 store_reset(reset_point);
2459 store_pool = old_pool;
2462 else /* Could not open trust_list file. */
2463 f.trusted_config = FALSE;
2466 /* Not root; don't trust config */
2467 f.trusted_config = FALSE;
2471 config_main_filelist = argrest;
2472 f.config_changed = TRUE;
2477 /* -D: set up a macro definition */
2480 #ifdef DISABLE_D_OPTION
2481 exim_fail("exim: -D is not available in this Exim binary\n");
2487 uschar *s = argrest;
2490 while (isspace(*s)) s++;
2492 if (*s < 'A' || *s > 'Z')
2493 exim_fail("exim: macro name set by -D must start with "
2494 "an upper case letter\n");
2496 while (isalnum(*s) || *s == '_')
2498 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2502 if (ptr == 0) { badarg = TRUE; break; }
2503 while (isspace(*s)) s++;
2506 if (*s++ != '=') { badarg = TRUE; break; }
2507 while (isspace(*s)) s++;
2510 for (m = macros_user; m; m = m->next)
2511 if (Ustrcmp(m->name, name) == 0)
2512 exim_fail("exim: duplicated -D in command line\n");
2514 m = macro_create(name, s, TRUE);
2516 if (clmacro_count >= MAX_CLMACROS)
2517 exim_fail("exim: too many -D options on command line\n");
2518 clmacros[clmacro_count++] =
2519 string_sprintf("-D%s=%s", m->name, m->replacement);
2524 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2525 The latter is now a no-op, retained for compatibility only. If -dd is used,
2526 debugging subprocesses of the daemon is disabled. */
2529 if (Ustrcmp(argrest, "ropcr") == 0)
2531 /* drop_cr = TRUE; */
2534 /* Use an intermediate variable so that we don't set debugging while
2535 decoding the debugging bits. */
2539 unsigned int selector = D_default;
2542 if (*argrest == 'd')
2544 f.debug_daemon = TRUE;
2548 decode_bits(&selector, 1, debug_notall, argrest,
2549 debug_options, debug_options_count, US"debug", 0);
2550 debug_selector = selector;
2555 /* -E: This is a local error message. This option is not intended for
2556 external use at all, but is not restricted to trusted callers because it
2557 does no harm (just suppresses certain error messages) and if Exim is run
2558 not setuid root it won't always be trusted when it generates error
2559 messages using this option. If there is a message id following -E, point
2560 message_reference at it, for logging. */
2563 f.local_error_message = TRUE;
2564 if (mac_ismsgid(argrest)) message_reference = argrest;
2568 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2569 option, so it looks as if historically the -oex options are also callable
2570 without the leading -o. So we have to accept them. Before the switch,
2571 anything starting -oe has been converted to -e. Exim does not support all
2572 of the sendmail error options. */
2575 if (Ustrcmp(argrest, "e") == 0)
2577 arg_error_handling = ERRORS_SENDER;
2578 errors_sender_rc = EXIT_SUCCESS;
2580 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2581 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2582 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2583 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2588 /* -F: Set sender's full name, used instead of the gecos entry from
2589 the password file. Since users can usually alter their gecos entries,
2590 there's no security involved in using this instead. The data can follow
2591 the -F or be in the next argument. */
2595 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2596 originator_name = string_copy_taint(argrest, TRUE);
2597 f.sender_name_forced = TRUE;
2601 /* -f: Set sender's address - this value is only actually used if Exim is
2602 run by a trusted user, or if untrusted_set_sender is set and matches the
2603 address, except that the null address can always be set by any user. The
2604 test for this happens later, when the value given here is ignored when not
2605 permitted. For an untrusted user, the actual sender is still put in Sender:
2606 if it doesn't match the From: header (unless no_local_from_check is set).
2607 The data can follow the -f or be in the next argument. The -r switch is an
2608 obsolete form of -f but since there appear to be programs out there that
2609 use anything that sendmail has ever supported, better accept it - the
2610 synonymizing is done before the switch above.
2612 At this stage, we must allow domain literal addresses, because we don't
2613 know what the setting of allow_domain_literals is yet. Ditto for trailing
2614 dots and strip_trailing_dot. */
2618 int dummy_start, dummy_end;
2621 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2623 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2626 uschar * temp = argrest + Ustrlen(argrest) - 1;
2627 while (temp >= argrest && isspace(*temp)) temp--;
2628 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2629 allow_domain_literals = TRUE;
2630 strip_trailing_dot = TRUE;
2632 allow_utf8_domains = TRUE;
2634 if (!(sender_address = parse_extract_address(argrest, &errmess,
2635 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2636 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2638 sender_address = string_copy_taint(sender_address, TRUE);
2640 message_smtputf8 = string_is_utf8(sender_address);
2641 allow_utf8_domains = FALSE;
2643 allow_domain_literals = FALSE;
2644 strip_trailing_dot = FALSE;
2646 f.sender_address_forced = TRUE;
2650 /* -G: sendmail invocation to specify that it's a gateway submission and
2651 sendmail may complain about problems instead of fixing them.
2652 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2653 not at this time complain about problems. */
2659 /* -h: Set the hop count for an incoming message. Exim does not currently
2660 support this; it always computes it by counting the Received: headers.
2661 To put it in will require a change to the spool header file format. */
2665 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2666 if (!isdigit(*argrest)) badarg = TRUE;
2670 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2671 not to be documented for sendmail but mailx (at least) uses it) */
2674 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2678 /* -L: set the identifier used for syslog; equivalent to setting
2679 syslog_processname in the config file, but needs to be an admin option. */
2683 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2684 if ((sz = Ustrlen(argrest)) > 32)
2685 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2687 exim_fail("exim: the -L syslog name is too short\n");
2688 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2692 receiving_message = FALSE;
2694 /* -MC: continue delivery of another message via an existing open
2695 file descriptor. This option is used for an internal call by the
2696 smtp transport when there is a pending message waiting to go to an
2697 address to which it has got a connection. Five subsequent arguments are
2698 required: transport name, host name, IP address, sequence number, and
2699 message_id. Transports may decline to create new processes if the sequence
2700 number gets too big. The channel is stdin. This (-MC) must be the last
2701 argument. There's a subsequent check that the real-uid is privileged.
2703 If we are running in the test harness. delay for a bit, to let the process
2704 that set this one up complete. This makes for repeatability of the logging,
2707 if (Ustrcmp(argrest, "C") == 0)
2709 union sockaddr_46 interface_sock;
2710 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2713 exim_fail("exim: too many or too few arguments after -MC\n");
2715 if (msg_action_arg >= 0)
2716 exim_fail("exim: incompatible arguments\n");
2718 continue_transport = string_copy_taint(argv[++i], TRUE);
2719 continue_hostname = string_copy_taint(argv[++i], TRUE);
2720 continue_host_address = string_copy_taint(argv[++i], TRUE);
2721 continue_sequence = Uatoi(argv[++i]);
2722 msg_action = MSG_DELIVER;
2723 msg_action_arg = ++i;
2724 forced_delivery = TRUE;
2725 queue_run_pid = passed_qr_pid;
2726 queue_run_pipe = passed_qr_pipe;
2728 if (!mac_ismsgid(argv[i]))
2729 exim_fail("exim: malformed message id %s after -MC option\n",
2732 /* Set up $sending_ip_address and $sending_port, unless proxied */
2734 if (!continue_proxy_cipher)
2735 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2737 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2740 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2743 testharness_pause_ms(500);
2747 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2751 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2752 precedes -MC (see above). The flag indicates that the host to which
2753 Exim is connected has accepted an AUTH sequence. */
2755 case 'A': f.smtp_authenticated = TRUE; break;
2757 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2758 that exim is connected to supports the esmtp extension DSN */
2760 case 'D': smtp_peer_options |= OPTION_DSN; break;
2762 /* -MCd: for debug, set a process-purpose string */
2764 case 'd': if (++i < argc)
2765 process_purpose = string_copy_taint(argv[i], TRUE);
2769 /* -MCG: set the queue name, to a non-default value */
2771 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2775 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2777 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2779 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2780 it preceded -MC (see above) */
2782 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2784 /* -MCQ: pass on the pid of the queue-running process that started
2785 this chain of deliveries and the fd of its synchronizing pipe; this
2786 is useful only when it precedes -MC (see above) */
2788 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2790 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2794 /* -MCq: do a quota check on the given recipient for the given size
2795 of message. Separate from -MC. */
2796 case 'q': rcpt_verify_quota = TRUE;
2797 if (++i < argc) message_size = Uatoi(argv[i]);
2801 /* -MCS: set the smtp_use_size flag; this is useful only when it
2802 precedes -MC (see above) */
2804 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2807 /* -MCt: similar to -MCT below but the connection is still open
2808 via a proxy process which handles the TLS context and coding.
2809 Require three arguments for the proxied local address and port,
2810 and the TLS cipher. */
2812 case 't': if (++i < argc)
2813 sending_ip_address = string_copy_taint(argv[i], TRUE);
2816 sending_port = (int)(Uatol(argv[i]));
2819 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2823 /* -MCT: set the tls_offered flag; this is useful only when it
2824 precedes -MC (see above). The flag indicates that the host to which
2825 Exim is connected has offered TLS support. */
2827 case 'T': smtp_peer_options |= OPTION_TLS; break;
2830 default: badarg = TRUE; break;
2835 /* -M[x]: various operations on the following list of message ids:
2836 -M deliver the messages, ignoring next retry times and thawing
2837 -Mc deliver the messages, checking next retry times, no thawing
2838 -Mf freeze the messages
2839 -Mg give up on the messages
2840 -Mt thaw the messages
2841 -Mrm remove the messages
2842 In the above cases, this must be the last option. There are also the
2843 following options which are followed by a single message id, and which
2844 act on that message. Some of them use the "recipient" addresses as well.
2845 -Mar add recipient(s)
2846 -Mmad mark all recipients delivered
2847 -Mmd mark recipients(s) delivered
2849 -Mset load a message for use with -be
2851 -Mvc show copy (of whole message, in RFC 2822 format)
2858 msg_action = MSG_DELIVER;
2859 forced_delivery = f.deliver_force_thaw = TRUE;
2861 else if (Ustrcmp(argrest, "ar") == 0)
2863 msg_action = MSG_ADD_RECIPIENT;
2864 one_msg_action = TRUE;
2866 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2867 else if (Ustrcmp(argrest, "es") == 0)
2869 msg_action = MSG_EDIT_SENDER;
2870 one_msg_action = TRUE;
2872 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2873 else if (Ustrcmp(argrest, "g") == 0)
2875 msg_action = MSG_DELIVER;
2876 deliver_give_up = TRUE;
2878 else if (Ustrcmp(argrest, "G") == 0)
2880 msg_action = MSG_SETQUEUE;
2881 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2883 else if (Ustrcmp(argrest, "mad") == 0)
2885 msg_action = MSG_MARK_ALL_DELIVERED;
2887 else if (Ustrcmp(argrest, "md") == 0)
2889 msg_action = MSG_MARK_DELIVERED;
2890 one_msg_action = TRUE;
2892 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2893 else if (Ustrcmp(argrest, "set") == 0)
2895 msg_action = MSG_LOAD;
2896 one_msg_action = TRUE;
2898 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2899 else if (Ustrcmp(argrest, "vb") == 0)
2901 msg_action = MSG_SHOW_BODY;
2902 one_msg_action = TRUE;
2904 else if (Ustrcmp(argrest, "vc") == 0)
2906 msg_action = MSG_SHOW_COPY;
2907 one_msg_action = TRUE;
2909 else if (Ustrcmp(argrest, "vh") == 0)
2911 msg_action = MSG_SHOW_HEADER;
2912 one_msg_action = TRUE;
2914 else if (Ustrcmp(argrest, "vl") == 0)
2916 msg_action = MSG_SHOW_LOG;
2917 one_msg_action = TRUE;
2919 else { badarg = TRUE; break; }
2921 /* All the -Mxx options require at least one message id. */
2923 msg_action_arg = i + 1;
2924 if (msg_action_arg >= argc)
2925 exim_fail("exim: no message ids given after %s option\n", arg);
2927 /* Some require only message ids to follow */
2929 if (!one_msg_action)
2931 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2932 exim_fail("exim: malformed message id %s after %s option\n",
2934 goto END_ARG; /* Remaining args are ids */
2937 /* Others require only one message id, possibly followed by addresses,
2938 which will be handled as normal arguments. */
2942 if (!mac_ismsgid(argv[msg_action_arg]))
2943 exim_fail("exim: malformed message id %s after %s option\n",
2944 argv[msg_action_arg], arg);
2950 /* Some programs seem to call the -om option without the leading o;
2951 for sendmail it askes for "me too". Exim always does this. */
2954 if (*argrest) badarg = TRUE;
2958 /* -N: don't do delivery - a debugging option that stops transports doing
2959 their thing. It implies debugging at the D_v level. */
2964 f.dont_deliver = TRUE;
2965 debug_selector |= D_v;
2966 debug_file = stderr;
2972 /* -n: This means "don't alias" in sendmail, apparently.
2973 For normal invocations, it has no effect.
2974 It may affect some other options. */
2980 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2981 option to the specified value. This form uses long names. We need to handle
2982 -O option=value and -Ooption=value. */
2987 exim_fail("exim: string expected after -O\n");
2993 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2996 if (!*(alias_arg = argrest))
2997 if (i+1 < argc) alias_arg = argv[++i];
2998 else exim_fail("exim: string expected after -oA\n");
3001 /* -oB: Set a connection message max value for remote deliveries */
3004 uschar * p = argrest;
3006 if (i+1 < argc && isdigit((argv[i+1][0])))
3010 connection_max_messages = 1;
3017 exim_fail("exim: number expected after -oB\n");
3018 connection_max_messages = Uatoi(p);
3023 /* -odb: background delivery */
3026 if (Ustrcmp(argrest, "b") == 0)
3028 f.synchronous_delivery = FALSE;
3029 arg_queue_only = FALSE;
3030 queue_only_set = TRUE;
3033 /* -odd: testsuite-only: add no inter-process delays */
3035 else if (Ustrcmp(argrest, "d") == 0)
3036 f.testsuite_delays = FALSE;
3038 /* -odf: foreground delivery (smail-compatible option); same effect as
3039 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3042 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3044 f.synchronous_delivery = TRUE;
3045 arg_queue_only = FALSE;
3046 queue_only_set = TRUE;
3049 /* -odq: queue only */
3051 else if (Ustrcmp(argrest, "q") == 0)
3053 f.synchronous_delivery = FALSE;
3054 arg_queue_only = TRUE;
3055 queue_only_set = TRUE;
3058 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3059 but no remote delivery */
3061 else if (Ustrcmp(argrest, "qs") == 0)
3063 f.queue_smtp = TRUE;
3064 arg_queue_only = FALSE;
3065 queue_only_set = TRUE;
3070 /* -oex: Sendmail error flags. As these are also accepted without the
3071 leading -o prefix, for compatibility with vacation and other callers,
3072 they are handled with -e above. */
3074 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3075 -oitrue: Another sendmail syntax for the same */
3078 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3083 /* -oM*: Set various characteristics for an incoming message; actually
3084 acted on for trusted callers only. */
3089 exim_fail("exim: data expected after -oM%s\n", argrest);
3091 /* -oMa: Set sender host address */
3093 if (Ustrcmp(argrest, "a") == 0)
3094 sender_host_address = string_copy_taint(argv[++i], TRUE);
3096 /* -oMaa: Set authenticator name */
3098 else if (Ustrcmp(argrest, "aa") == 0)
3099 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3101 /* -oMas: setting authenticated sender */
3103 else if (Ustrcmp(argrest, "as") == 0)
3104 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3106 /* -oMai: setting authenticated id */
3108 else if (Ustrcmp(argrest, "ai") == 0)
3109 authenticated_id = string_copy_taint(argv[++i], TRUE);
3111 /* -oMi: Set incoming interface address */
3113 else if (Ustrcmp(argrest, "i") == 0)
3114 interface_address = string_copy_taint(argv[++i], TRUE);
3116 /* -oMm: Message reference */
3118 else if (Ustrcmp(argrest, "m") == 0)
3120 if (!mac_ismsgid(argv[i+1]))
3121 exim_fail("-oMm must be a valid message ID\n");
3122 if (!f.trusted_config)
3123 exim_fail("-oMm must be called by a trusted user/config\n");
3124 message_reference = argv[++i];
3127 /* -oMr: Received protocol */
3129 else if (Ustrcmp(argrest, "r") == 0)
3131 if (received_protocol)
3132 exim_fail("received_protocol is set already\n");
3134 received_protocol = string_copy_taint(argv[++i], TRUE);
3136 /* -oMs: Set sender host name */
3138 else if (Ustrcmp(argrest, "s") == 0)
3139 sender_host_name = string_copy_taint(argv[++i], TRUE);
3141 /* -oMt: Set sender ident */
3143 else if (Ustrcmp(argrest, "t") == 0)
3145 sender_ident_set = TRUE;
3146 sender_ident = string_copy_taint(argv[++i], TRUE);
3149 /* Else a bad argument */
3156 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3157 seem to call this as -m (undocumented), so that is also accepted (see
3159 /* -oo: An ancient flag for old-style addresses which still seems to
3160 crop up in some calls (see in SCO). */
3164 if (*argrest) badarg = TRUE;
3167 /* -oP <name>: set pid file path for daemon
3168 -oPX: delete pid file of daemon */
3171 if (!*argrest) override_pid_file_path = argv[++i];
3172 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3177 /* -or <n>: set timeout for non-SMTP acceptance
3178 -os <n>: set timeout for SMTP acceptance */
3183 int * tp = argrest[-1] == 'r'
3184 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3186 *tp = readconf_readtime(argrest, 0, FALSE);
3187 else if (i+1 < argc)
3188 *tp = readconf_readtime(argv[++i], 0, FALSE);
3191 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3195 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3198 if (*argrest) badarg = TRUE;
3199 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3202 /* Unknown -o argument */
3210 /* -ps: force Perl startup; -pd force delayed Perl startup */
3214 if (*argrest == 's' && argrest[1] == 0)
3216 perl_start_option = 1;
3219 if (*argrest == 'd' && argrest[1] == 0)
3221 perl_start_option = -1;
3226 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3227 which sets the host protocol and host name */
3230 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3234 uschar * hn = Ustrchr(argrest, ':');
3236 if (received_protocol)
3237 exim_fail("received_protocol is set already\n");
3240 received_protocol = string_copy_taint(argrest, TRUE);
3243 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3244 sender_host_name = string_copy_taint(hn + 1, TRUE);
3251 receiving_message = FALSE;
3252 if (queue_interval >= 0)
3253 exim_fail("exim: -q specified more than once\n");
3255 /* -qq...: Do queue runs in a 2-stage manner */
3257 if (*argrest == 'q')
3259 f.queue_2stage = TRUE;
3263 /* -qi...: Do only first (initial) deliveries */
3265 if (*argrest == 'i')
3267 f.queue_run_first_delivery = TRUE;
3271 /* -qf...: Run the queue, forcing deliveries
3272 -qff..: Ditto, forcing thawing as well */
3274 if (*argrest == 'f')
3276 f.queue_run_force = TRUE;
3277 if (*++argrest == 'f')
3279 f.deliver_force_thaw = TRUE;
3284 /* -q[f][f]l...: Run the queue only on local deliveries */
3286 if (*argrest == 'l')
3288 f.queue_run_local = TRUE;
3292 /* -q[f][f][l][G<name>]... Work on the named queue */
3294 if (*argrest == 'G')
3297 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3298 queue_name = string_copyn(argrest, i);
3300 if (*argrest == '/') argrest++;
3303 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3304 only, optionally named, optionally starting from a given message id. */
3306 if (!(list_queue || count_queue))
3308 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3311 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3312 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3313 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3314 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3317 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3318 forced, optionally local only, optionally named. */
3320 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3322 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3326 case 'R': /* Synonymous with -qR... */
3327 receiving_message = FALSE;
3329 /* -Rf: As -R (below) but force all deliveries,
3330 -Rff: Ditto, but also thaw all frozen messages,
3331 -Rr: String is regex
3332 -Rrf: Regex and force
3333 -Rrff: Regex and force and thaw
3335 in all cases provided there are no further characters in this
3339 for (int i = 0; i < nelem(rsopts); i++)
3340 if (Ustrcmp(argrest, rsopts[i]) == 0)
3342 if (i != 2) f.queue_run_force = TRUE;
3343 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3344 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3345 argrest += Ustrlen(rsopts[i]);
3348 /* -R: Set string to match in addresses for forced queue run to
3349 pick out particular messages. */
3352 deliver_selectstring = string_copy_taint(argrest, TRUE);
3353 else if (i+1 < argc)
3354 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3356 exim_fail("exim: string expected after -R\n");
3360 /* -r: an obsolete synonym for -f (see above) */
3363 /* -S: Like -R but works on sender. */
3365 case 'S': /* Synonymous with -qS... */
3366 receiving_message = FALSE;
3368 /* -Sf: As -S (below) but force all deliveries,
3369 -Sff: Ditto, but also thaw all frozen messages,
3370 -Sr: String is regex
3371 -Srf: Regex and force
3372 -Srff: Regex and force and thaw
3374 in all cases provided there are no further characters in this
3378 for (int i = 0; i < nelem(rsopts); i++)
3379 if (Ustrcmp(argrest, rsopts[i]) == 0)
3381 if (i != 2) f.queue_run_force = TRUE;
3382 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3383 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3384 argrest += Ustrlen(rsopts[i]);
3387 /* -S: Set string to match in addresses for forced queue run to
3388 pick out particular messages. */
3391 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3392 else if (i+1 < argc)
3393 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3395 exim_fail("exim: string expected after -S\n");
3398 /* -Tqt is an option that is exclusively for use by the testing suite.
3399 It is not recognized in other circumstances. It allows for the setting up
3400 of explicit "queue times" so that various warning/retry things can be
3401 tested. Otherwise variability of clock ticks etc. cause problems. */
3404 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3405 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3410 /* -t: Set flag to extract recipients from body of message. */
3413 if (!*argrest) extract_recipients = TRUE;
3415 /* -ti: Set flag to extract recipients from body of message, and also
3416 specify that dot does not end the message. */
3418 else if (Ustrcmp(argrest, "i") == 0)
3420 extract_recipients = TRUE;
3424 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3427 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3434 /* -U: This means "initial user submission" in sendmail, apparently. The
3435 doc claims that in future sendmail may refuse syntactically invalid
3436 messages instead of fixing them. For the moment, we just ignore it. */
3442 /* -v: verify things - this is a very low-level debugging */
3447 debug_selector |= D_v;
3448 debug_file = stderr;
3454 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3456 The -x flag tells the sendmail command that mail from a local
3457 mail program has National Language Support (NLS) extended characters
3458 in the body of the mail item. The sendmail command can send mail with
3459 extended NLS characters across networks that normally corrupts these
3462 As Exim is 8-bit clean, it just ignores this flag. */
3465 if (*argrest) badarg = TRUE;
3468 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3469 logs to that file. We swallow the parameter and otherwise ignore it. */
3474 exim_fail("exim: string expected after -X\n");
3480 log_oneline = string_copy_taint(argv[i], TRUE);
3482 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3485 /* All other initial characters are errors */
3490 } /* End of high-level switch statement */
3492 /* Failed to recognize the option, or syntax error */
3495 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3496 "option %s\n", arg);
3500 /* If -R or -S have been specified without -q, assume a single queue run. */
3502 if ( (deliver_selectstring || deliver_selectstring_sender)
3503 && queue_interval < 0)
3508 store_pool = old_pool;
3511 /* If usage_wanted is set we call the usage function - which never returns */
3512 if (usage_wanted) exim_usage(called_as);
3514 /* Arguments have been processed. Check for incompatibilities. */
3515 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3516 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3517 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3518 || filter_test != FTEST_NONE
3519 || msg_action_arg > 0 && !one_msg_action
3521 || ( msg_action_arg > 0
3522 && ( f.daemon_listen || queue_interval > 0 || list_options
3523 || checking && msg_action != MSG_LOAD
3524 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3526 || ( (f.daemon_listen || queue_interval > 0)
3527 && ( sender_address || list_options || list_queue || checking
3530 || f.daemon_listen && queue_interval == 0
3531 || f.inetd_wait_mode && queue_interval >= 0
3533 && ( checking || smtp_input || extract_recipients
3534 || filter_test != FTEST_NONE || bi_option
3536 || ( verify_address_mode
3537 && ( f.address_test_mode || smtp_input || extract_recipients
3538 || filter_test != FTEST_NONE || bi_option
3540 || ( f.address_test_mode
3541 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3545 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3547 || deliver_selectstring && queue_interval < 0
3548 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3550 exim_fail("exim: incompatible command-line options or arguments\n");
3552 /* If debugging is set up, set the file and the file descriptor to pass on to
3553 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3554 to run in the foreground. */
3556 if (debug_selector != 0)
3558 debug_file = stderr;
3559 debug_fd = fileno(debug_file);
3560 f.background_daemon = FALSE;
3561 testharness_pause_ms(100); /* lets caller finish */
3562 if (debug_selector != D_v) /* -v only doesn't show this */
3564 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3565 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3567 if (!version_printed)
3568 show_whats_supported(stderr);
3572 /* When started with root privilege, ensure that the limits on the number of
3573 open files and the number of processes (where that is accessible) are
3574 sufficiently large, or are unset, in case Exim has been called from an
3575 environment where the limits are screwed down. Not all OS have the ability to
3576 change some of these limits. */
3580 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3586 #ifdef RLIMIT_NOFILE
3587 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3589 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3591 rlp.rlim_cur = rlp.rlim_max = 0;
3594 /* I originally chose 1000 as a nice big number that was unlikely to
3595 be exceeded. It turns out that some older OS have a fixed upper limit of
3598 if (rlp.rlim_cur < 1000)
3600 rlp.rlim_cur = rlp.rlim_max = 1000;
3601 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3603 rlp.rlim_cur = rlp.rlim_max = 256;
3604 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3605 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3612 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3614 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3616 rlp.rlim_cur = rlp.rlim_max = 0;
3619 #ifdef RLIM_INFINITY
3620 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3622 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3624 if (rlp.rlim_cur < 1000)
3626 rlp.rlim_cur = rlp.rlim_max = 1000;
3628 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3629 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3635 /* Exim is normally entered as root (but some special configurations are
3636 possible that don't do this). However, it always spins off sub-processes that
3637 set their uid and gid as required for local delivery. We don't want to pass on
3638 any extra groups that root may belong to, so we want to get rid of them all at
3641 We need to obey setgroups() at this stage, before possibly giving up root
3642 privilege for a changed configuration file, but later on we might need to
3643 check on the additional groups for the admin user privilege - can't do that
3644 till after reading the config, which might specify the exim gid. Therefore,
3645 save the group list here first. */
3647 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3648 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3650 /* There is a fundamental difference in some BSD systems in the matter of
3651 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3652 known not to be different. On the "different" systems there is a single group
3653 list, and the first entry in it is the current group. On all other versions of
3654 Unix there is a supplementary group list, which is in *addition* to the current
3655 group. Consequently, to get rid of all extraneous groups on a "standard" system
3656 you pass over 0 groups to setgroups(), while on a "different" system you pass
3657 over a single group - the current group, which is always the first group in the
3658 list. Calling setgroups() with zero groups on a "different" system results in
3659 an error return. The following code should cope with both types of system.
3661 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3662 the "setgroups() with zero groups" - and changes the egid.
3663 Thanks to that we had to stash the original_egid above, for use below
3664 in the call to exim_setugid().
3666 However, if this process isn't running as root, setgroups() can't be used
3667 since you have to be root to run it, even if throwing away groups.
3668 Except, sigh, for Hurd - where you can.
3669 Not being root here happens only in some unusual configurations. */
3672 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3673 && setgroups(0, NULL) != 0
3675 && setgroups(1, group_list) != 0)
3676 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3678 /* If the configuration file name has been altered by an argument on the
3679 command line (either a new file name or a macro definition) and the caller is
3680 not root, or if this is a filter testing run, remove any setuid privilege the
3681 program has and run as the underlying user.
3683 The exim user is locked out of this, which severely restricts the use of -C
3686 Otherwise, set the real ids to the effective values (should be root unless run
3687 from inetd, which it can either be root or the exim uid, if one is configured).
3689 There is a private mechanism for bypassing some of this, in order to make it
3690 possible to test lots of configurations automatically, without having either to
3691 recompile each time, or to patch in an actual configuration file name and other
3692 values (such as the path name). If running in the test harness, pretend that
3693 configuration file changes and macro definitions haven't happened. */
3696 (!f.trusted_config || /* Config changed, or */
3697 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3698 real_uid != root_uid && /* Not root, and */
3699 !f.running_in_test_harness /* Not fudged */
3701 expansion_test /* expansion testing */
3703 filter_test != FTEST_NONE) /* Filter testing */
3705 setgroups(group_count, group_list);
3706 exim_setugid(real_uid, real_gid, FALSE,
3707 US"-C, -D, -be or -bf forces real uid");
3708 removed_privilege = TRUE;
3710 /* In the normal case when Exim is called like this, stderr is available
3711 and should be used for any logging information because attempts to write
3712 to the log will usually fail. To arrange this, we unset really_exim. However,
3713 if no stderr is available there is no point - we might as well have a go
3714 at the log (if it fails, syslog will be written).
3716 Note that if the invoker is Exim, the logs remain available. Messing with
3717 this causes unlogged successful deliveries. */
3719 if (log_stderr && real_uid != exim_uid)
3720 f.really_exim = FALSE;
3723 /* Privilege is to be retained for the moment. It may be dropped later,
3724 depending on the job that this Exim process has been asked to do. For now, set
3725 the real uid to the effective so that subsequent re-execs of Exim are done by a
3729 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3731 /* If testing a filter, open the file(s) now, before wasting time doing other
3732 setups and reading the message. */
3734 if (filter_test & FTEST_SYSTEM)
3735 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3736 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3739 if (filter_test & FTEST_USER)
3740 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3741 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3744 /* Initialise lookup_list
3745 If debugging, already called above via version reporting.
3746 In either case, we initialise the list of available lookups while running
3747 as root. All dynamically modules are loaded from a directory which is
3748 hard-coded into the binary and is code which, if not a module, would be
3749 part of Exim already. Ability to modify the content of the directory
3750 is equivalent to the ability to modify a setuid binary!
3752 This needs to happen before we read the main configuration. */
3756 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3759 /* Read the main runtime configuration data; this gives up if there
3760 is a failure. It leaves the configuration file open so that the subsequent
3761 configuration data for delivery can be read if needed.
3763 NOTE: immediately after opening the configuration file we change the working
3764 directory to "/"! Later we change to $spool_directory. We do it there, because
3765 during readconf_main() some expansion takes place already. */
3767 /* Store the initial cwd before we change directories. Can be NULL if the
3768 dir has already been unlinked. */
3769 initial_cwd = os_getcwd(NULL, 0);
3772 -be[m] expansion test -
3773 -b[fF] filter test new
3775 -bmalware malware_test_file new
3777 -brw rewrite test new
3779 -bv[s] address verify -
3781 -bP <option> (except -bP config, which sets list_config)
3783 If any of these options is set, we suppress warnings about configuration
3784 issues (currently about tls_advertise_hosts and keep_environment not being
3788 #ifdef MEASURE_TIMING
3789 struct timeval t0, diff;
3790 (void)gettimeofday(&t0, NULL);
3793 readconf_main(checking || list_options);
3795 #ifdef MEASURE_TIMING
3796 report_time_since(&t0, US"readconf_main (delta)");
3801 /* Now in directory "/" */
3803 if (cleanup_environment() == FALSE)
3804 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3807 /* If an action on specific messages is requested, or if a daemon or queue
3808 runner is being started, we need to know if Exim was called by an admin user.
3809 This is the case if the real user is root or exim, or if the real group is
3810 exim, or if one of the supplementary groups is exim or a group listed in
3811 admin_groups. We don't fail all message actions immediately if not admin_user,
3812 since some actions can be performed by non-admin users. Instead, set admin_user
3813 for later interrogation. */
3815 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3816 f.admin_user = TRUE;
3818 for (int i = 0; i < group_count && !f.admin_user; i++)
3819 if (group_list[i] == exim_gid)
3820 f.admin_user = TRUE;
3821 else if (admin_groups)
3822 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3823 if (admin_groups[j] == group_list[i])
3824 f.admin_user = TRUE;
3826 /* Another group of privileged users are the trusted users. These are root,
3827 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3828 are permitted to specify sender_addresses with -f on the command line, and
3829 other message parameters as well. */
3831 if (real_uid == root_uid || real_uid == exim_uid)
3832 f.trusted_caller = TRUE;
3836 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3837 if (trusted_users[i] == real_uid)
3838 f.trusted_caller = TRUE;
3841 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3842 if (trusted_groups[i] == real_gid)
3843 f.trusted_caller = TRUE;
3844 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3845 if (trusted_groups[i] == group_list[j])
3846 f.trusted_caller = TRUE;
3849 /* At this point, we know if the user is privileged and some command-line
3850 options become possibly impermissible, depending upon the configuration file. */
3852 if (checking && commandline_checks_require_admin && !f.admin_user)
3853 exim_fail("exim: those command-line flags are set to require admin\n");
3855 /* Handle the decoding of logging options. */
3857 decode_bits(log_selector, log_selector_size, log_notall,
3858 log_selector_string, log_options, log_options_count, US"log", 0);
3862 debug_printf("configuration file is %s\n", config_main_filename);
3863 debug_printf("log selectors =");
3864 for (int i = 0; i < log_selector_size; i++)
3865 debug_printf(" %08x", log_selector[i]);
3869 /* If domain literals are not allowed, check the sender address that was
3870 supplied with -f. Ditto for a stripped trailing dot. */
3874 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3875 exim_fail("exim: bad -f address \"%s\": domain literals not "
3876 "allowed\n", sender_address);
3877 if (f_end_dot && !strip_trailing_dot)
3878 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3879 "(trailing dot not allowed)\n", sender_address);
3882 /* See if an admin user overrode our logging. */
3884 if (cmdline_syslog_name)
3887 syslog_processname = cmdline_syslog_name;
3888 log_file_path = string_copy(CUS"syslog");
3891 /* not a panic, non-privileged users should not be able to spam paniclog */
3893 "exim: you lack sufficient privilege to specify syslog process name\n");
3895 /* Paranoia check of maximum lengths of certain strings. There is a check
3896 on the length of the log file path in log.c, which will come into effect
3897 if there are any calls to write the log earlier than this. However, if we
3898 get this far but the string is very long, it is better to stop now than to
3899 carry on and (e.g.) receive a message and then have to collapse. The call to
3900 log_write() from here will cause the ultimate panic collapse if the complete
3901 file name exceeds the buffer length. */
3903 if (Ustrlen(log_file_path) > 200)
3904 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3905 "log_file_path is longer than 200 chars: aborting");
3907 if (Ustrlen(pid_file_path) > 200)
3908 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3909 "pid_file_path is longer than 200 chars: aborting");
3911 if (Ustrlen(spool_directory) > 200)
3912 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3913 "spool_directory is longer than 200 chars: aborting");
3915 /* Length check on the process name given to syslog for its TAG field,
3916 which is only permitted to be 32 characters or less. See RFC 3164. */
3918 if (Ustrlen(syslog_processname) > 32)
3919 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3920 "syslog_processname is longer than 32 chars: aborting");
3925 log_write(0, LOG_MAIN, "%s", log_oneline);
3926 return EXIT_SUCCESS;
3929 return EXIT_FAILURE;
3931 /* In some operating systems, the environment variable TMPDIR controls where
3932 temporary files are created; Exim doesn't use these (apart from when delivering
3933 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3934 If TMPDIR is found in the environment, reset it to the value defined in the
3935 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3936 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3937 EXIM_TMPDIR by the build scripts.
3941 if (environ) for (uschar ** p = USS environ; *p; p++)
3942 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3944 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3945 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3947 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3951 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3952 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3953 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3954 called by a user who has set the TZ variable. This then affects the timestamps
3955 in log files and in Received: headers, and any created Date: header lines. The
3956 required timezone is settable in the configuration file, so nothing can be done
3957 about this earlier - but hopefully nothing will normally be logged earlier than
3958 this. We have to make a new environment if TZ is wrong, but don't bother if
3959 timestamps_utc is set, because then all times are in UTC anyway. */
3961 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3962 f.timestamps_utc = TRUE;
3965 uschar *envtz = US getenv("TZ");
3967 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3968 : timezone_string != NULL
3971 uschar **p = USS environ;
3975 if (environ) while (*p++) count++;
3976 if (!envtz) count++;
3977 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3978 if (environ) for (p = USS environ; *p; p++)
3979 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3980 if (timezone_string)
3982 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3983 sprintf(CS *newp++, "TZ=%s", timezone_string);
3988 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3989 tod_stamp(tod_log));
3993 /* Handle the case when we have removed the setuid privilege because of -C or
3994 -D. This means that the caller of Exim was not root.
3996 There is a problem if we were running as the Exim user. The sysadmin may
3997 expect this case to retain privilege because "the binary was called by the
3998 Exim user", but it hasn't, because either the -D option set macros, or the
3999 -C option set a non-trusted configuration file. There are two possibilities:
4001 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4002 to do message deliveries. Thus, the fact that it is running as a
4003 non-privileged user is plausible, and might be wanted in some special
4004 configurations. However, really_exim will have been set false when
4005 privilege was dropped, to stop Exim trying to write to its normal log
4006 files. Therefore, re-enable normal log processing, assuming the sysadmin
4007 has set up the log directory correctly.
4009 (2) If deliver_drop_privilege is not set, the configuration won't work as
4010 apparently intended, and so we log a panic message. In order to retain
4011 root for -C or -D, the caller must either be root or be invoking a
4012 trusted configuration file (when deliver_drop_privilege is false). */
4014 if ( removed_privilege
4015 && (!f.trusted_config || opt_D_used)
4016 && real_uid == exim_uid)
4017 if (deliver_drop_privilege)
4018 f.really_exim = TRUE; /* let logging work normally */
4020 log_write(0, LOG_MAIN|LOG_PANIC,
4021 "exim user lost privilege for using %s option",
4022 f.trusted_config? "-D" : "-C");
4024 /* Start up Perl interpreter if Perl support is configured and there is a
4025 perl_startup option, and the configuration or the command line specifies
4026 initializing starting. Note that the global variables are actually called
4027 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4030 if (perl_start_option != 0)
4031 opt_perl_at_start = (perl_start_option > 0);
4032 if (opt_perl_at_start && opt_perl_startup != NULL)
4035 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4036 if ((errstr = init_perl(opt_perl_startup)))
4037 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4038 opt_perl_started = TRUE;
4040 #endif /* EXIM_PERL */
4042 /* Log the arguments of the call if the configuration file said so. This is
4043 a debugging feature for finding out what arguments certain MUAs actually use.
4044 Don't attempt it if logging is disabled, or if listing variables or if
4045 verifying/testing addresses or expansions. */
4047 if ( (debug_selector & D_any || LOGGING(arguments))
4048 && f.really_exim && !list_options && !checking)
4050 uschar *p = big_buffer;
4051 Ustrcpy(p, US"cwd= (failed)");
4057 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4058 p += 4 + Ustrlen(initial_cwd);
4059 /* in case p is near the end and we don't provide enough space for
4060 * string_format to be willing to write. */
4064 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4066 for (int i = 0; i < argc; i++)
4068 int len = Ustrlen(argv[i]);
4069 const uschar *printing;
4071 if (p + len + 8 >= big_buffer + big_buffer_size)
4073 Ustrcpy(p, US" ...");
4074 log_write(0, LOG_MAIN, "%s", big_buffer);
4075 Ustrcpy(big_buffer, US"...");
4078 printing = string_printing(argv[i]);
4079 if (!*printing) quote = US"\"";
4082 const uschar *pp = printing;
4084 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4086 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4087 (p - big_buffer) - 4), printing, quote);
4090 if (LOGGING(arguments))
4091 log_write(0, LOG_MAIN, "%s", big_buffer);
4093 debug_printf("%s\n", big_buffer);
4096 /* Set the working directory to be the top-level spool directory. We don't rely
4097 on this in the code, which always uses fully qualified names, but it's useful
4098 for core dumps etc. Don't complain if it fails - the spool directory might not
4099 be generally accessible and calls with the -C option (and others) have lost
4100 privilege by now. Before the chdir, we try to ensure that the directory exists.
4103 if (Uchdir(spool_directory) != 0)
4106 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4107 dummy = /* quieten compiler */ Uchdir(spool_directory);
4108 dummy = dummy; /* yet more compiler quietening, sigh */
4111 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4112 alias file. Exim doesn't have such a concept, but this call is screwed into
4113 Sun's YP makefiles. Handle this by calling a configured script, as the real
4114 user who called Exim. The -oA option can be used to pass an argument to the
4119 (void)fclose(config_file);
4120 if (bi_command && *bi_command)
4124 argv[i++] = bi_command;
4125 if (alias_arg) argv[i++] = alias_arg;
4128 setgroups(group_count, group_list);
4129 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4131 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4132 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4134 execv(CS argv[0], (char *const *)argv);
4135 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4139 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4144 /* We moved the admin/trusted check to be immediately after reading the
4145 configuration file. We leave these prints here to ensure that syslog setup,
4146 logfile setup, and so on has already happened. */
4148 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4149 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4151 /* Only an admin user may start the daemon or force a queue run in the default
4152 configuration, but the queue run restriction can be relaxed. Only an admin
4153 user may request that a message be returned to its sender forthwith. Only an
4154 admin user may specify a debug level greater than D_v (because it might show
4155 passwords, etc. in lookup queries). Only an admin user may request a queue
4156 count. Only an admin user can use the test interface to scan for email
4157 (because Exim will be in the spool dir and able to look at mails). */
4161 BOOL debugset = (debug_selector & ~D_v) != 0;
4162 if ( deliver_give_up || f.daemon_listen || malware_test_file
4163 || count_queue && queue_list_requires_admin
4164 || list_queue && queue_list_requires_admin
4165 || queue_interval >= 0 && prod_requires_admin
4166 || queue_name_dest && prod_requires_admin
4167 || debugset && !f.running_in_test_harness
4169 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4172 /* If the real user is not root or the exim uid, the argument for passing
4173 in an open TCP/IP connection for another message is not permitted, nor is
4174 running with the -N option for any delivery action, unless this call to exim is
4175 one that supplied an input message, or we are using a patched exim for
4176 regression testing. */
4178 if ( real_uid != root_uid && real_uid != exim_uid
4179 && ( continue_hostname
4181 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4183 && !f.running_in_test_harness
4185 exim_fail("exim: Permission denied\n");
4187 /* If the caller is not trusted, certain arguments are ignored when running for
4188 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4189 Note that authority for performing certain actions on messages is tested in the
4190 queue_action() function. */
4192 if (!f.trusted_caller && !checking)
4194 sender_host_name = sender_host_address = interface_address =
4195 sender_ident = received_protocol = NULL;
4196 sender_host_port = interface_port = 0;
4197 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4200 /* If a sender host address is set, extract the optional port number off the
4201 end of it and check its syntax. Do the same thing for the interface address.
4202 Exim exits if the syntax is bad. */
4206 if (sender_host_address)
4207 sender_host_port = check_port(sender_host_address);
4208 if (interface_address)
4209 interface_port = check_port(interface_address);
4212 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4215 if (f.trusted_caller)
4217 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4218 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4221 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4224 /* If an SMTP message is being received check to see if the standard input is a
4225 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4226 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4231 union sockaddr_46 inetd_sock;
4232 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4233 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4235 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4236 if (family == AF_INET || family == AF_INET6)
4238 union sockaddr_46 interface_sock;
4239 size = sizeof(interface_sock);
4241 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4242 interface_address = host_ntoa(-1, &interface_sock, NULL,
4245 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4247 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4250 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4251 NULL, &sender_host_port);
4252 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4253 "inetd is not supported when mua_wrapper is set");
4257 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4262 /* If the load average is going to be needed while receiving a message, get it
4263 now for those OS that require the first call to os_getloadavg() to be done as
4264 root. There will be further calls later for each message received. */
4266 #ifdef LOAD_AVG_NEEDS_ROOT
4267 if ( receiving_message
4268 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4269 load_average = OS_GETLOADAVG();
4272 /* The queue_only configuration option can be overridden by -odx on the command
4273 line, except that if queue_only_override is false, queue_only cannot be unset
4274 from the command line. */
4276 if (queue_only_set && (queue_only_override || arg_queue_only))
4277 queue_only = arg_queue_only;
4279 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4282 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4283 if (arg_smtp_receive_timeout >= 0)
4284 smtp_receive_timeout = arg_smtp_receive_timeout;
4286 /* If Exim was started with root privilege, unless we have already removed the
4287 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4288 except when starting the daemon or doing some kind of delivery or address
4289 testing (-bt). These are the only cases when root need to be retained. We run
4290 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4291 retained only for starting the daemon. We always do the initgroups() in this
4292 situation (controlled by the TRUE below), in order to be as close as possible
4293 to the state Exim usually runs in. */
4295 if ( !unprivileged /* originally had root AND */
4296 && !removed_privilege /* still got root AND */
4297 && !f.daemon_listen /* not starting the daemon */
4298 && queue_interval <= 0 /* (either kind of daemon) */
4299 && ( /* AND EITHER */
4300 deliver_drop_privilege /* requested unprivileged */
4302 queue_interval < 0 /* not running the queue */
4303 && ( msg_action_arg < 0 /* and */
4304 || msg_action != MSG_DELIVER /* not delivering */
4306 && (!checking || !f.address_test_mode) /* not address checking */
4307 && !rcpt_verify_quota /* and not quota checking */
4309 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4311 /* When we are retaining a privileged uid, we still change to the exim gid. */
4316 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4317 rv = setgid(exim_gid);
4318 /* Impact of failure is that some stuff might end up with an incorrect group.
4319 We track this for failures from root, since any attempt to change privilege
4320 by root should succeed and failures should be examined. For non-root,
4321 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4322 no need to complain then. */
4324 if (!(unprivileged || removed_privilege))
4325 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4328 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4329 (long int)exim_gid, strerror(errno));
4333 /* Handle a request to scan a file for malware */
4334 if (malware_test_file)
4336 #ifdef WITH_CONTENT_SCAN
4338 set_process_info("scanning file for malware");
4339 if ((result = malware_in_file(malware_test_file)) == FAIL)
4341 printf("No malware found.\n");
4346 printf("Malware lookup returned non-okay/fail: %d\n", result);
4350 printf("Malware found: %s\n", malware_name);
4352 printf("Malware scan detected malware of unknown name.\n");
4354 printf("Malware scanning not enabled at compile time.\n");
4359 /* Handle a request to list the delivery queue */
4363 set_process_info("listing the queue");
4364 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4368 /* Handle a request to count the delivery queue */
4372 set_process_info("counting the queue");
4373 fprintf(stdout, "%u\n", queue_count());
4377 /* Handle actions on specific messages, except for the force delivery and
4378 message load actions, which are done below. Some actions take a whole list of
4379 message ids, which are known to continue up to the end of the arguments. Others
4380 take a single message id and then operate on the recipients list. */
4382 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4384 int yield = EXIT_SUCCESS;
4385 set_process_info("acting on specified messages");
4387 /* ACL definitions may be needed when removing a message (-Mrm) because
4388 event_action gets expanded */
4390 if (msg_action == MSG_REMOVE)
4393 if (!one_msg_action)
4395 for (i = msg_action_arg; i < argc; i++)
4396 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4397 yield = EXIT_FAILURE;
4400 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4401 default: printf("\n"); break;
4405 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4406 recipients_arg)) yield = EXIT_FAILURE;
4410 /* We used to set up here to skip reading the ACL section, on
4411 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4412 Now, since the intro of the ${acl } expansion, ACL definitions may be
4413 needed in transports so we lost the optimisation. */
4416 #ifdef MEASURE_TIMING
4417 struct timeval t0, diff;
4418 (void)gettimeofday(&t0, NULL);
4423 #ifdef MEASURE_TIMING
4424 report_time_since(&t0, US"readconf_rest (delta)");
4428 /* Handle a request to check quota */
4429 if (rcpt_verify_quota)
4430 if (real_uid != root_uid && real_uid != exim_uid)
4431 exim_fail("exim: Permission denied\n");
4432 else if (recipients_arg >= argc)
4433 exim_fail("exim: missing recipient for quota check\n");
4436 verify_quota(argv[recipients_arg]);
4437 exim_exit(EXIT_SUCCESS);
4440 /* Handle the -brt option. This is for checking out retry configurations.
4441 The next three arguments are a domain name or a complete address, and
4442 optionally two error numbers. All it does is to call the function that
4443 scans the retry configuration data. */
4445 if (test_retry_arg >= 0)
4447 retry_config *yield;
4448 int basic_errno = 0;
4452 if (test_retry_arg >= argc)
4454 printf("-brt needs a domain or address argument\n");
4455 exim_exit(EXIT_FAILURE);
4457 s1 = argv[test_retry_arg++];
4460 /* If the first argument contains no @ and no . it might be a local user
4461 or it might be a single-component name. Treat as a domain. */
4463 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4465 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4466 "being \ntreated as a one-component domain, not as a local part.\n\n",
4470 /* There may be an optional second domain arg. */
4472 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4473 s2 = argv[test_retry_arg++];
4475 /* The final arg is an error name */
4477 if (test_retry_arg < argc)
4479 uschar *ss = argv[test_retry_arg];
4481 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4484 printf("%s\n", CS error);
4485 return EXIT_FAILURE;
4488 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4489 code > 100 as an error is for matching codes to the decade. Turn them into
4490 a real error code, off the decade. */
4492 if (basic_errno == ERRNO_MAIL4XX ||
4493 basic_errno == ERRNO_RCPT4XX ||
4494 basic_errno == ERRNO_DATA4XX)
4496 int code = (more_errno >> 8) & 255;
4498 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4499 else if (code > 100)
4500 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4504 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4505 printf("No retry information found\n");
4508 more_errno = yield->more_errno;
4509 printf("Retry rule: %s ", yield->pattern);
4511 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4513 printf("quota%s%s ",
4514 (more_errno > 0)? "_" : "",
4515 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4517 else if (yield->basic_errno == ECONNREFUSED)
4519 printf("refused%s%s ",
4520 (more_errno > 0)? "_" : "",
4521 (more_errno == 'M')? "MX" :
4522 (more_errno == 'A')? "A" : "");
4524 else if (yield->basic_errno == ETIMEDOUT)
4527 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4529 if (more_errno != 0) printf("_%s",
4530 (more_errno == 'M')? "MX" : "A");
4533 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4534 printf("auth_failed ");
4537 for (retry_rule * r = yield->rules; r; r = r->next)
4539 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4540 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4546 printf(",%d.", x/1000);
4560 exim_exit(EXIT_SUCCESS);
4563 /* Handle a request to list one or more configuration options */
4564 /* If -n was set, we suppress some information */
4569 set_process_info("listing variables");
4570 if (recipients_arg >= argc)
4571 fail = !readconf_print(US"all", NULL, flag_n);
4572 else for (i = recipients_arg; i < argc; i++)
4575 (Ustrcmp(argv[i], "router") == 0 ||
4576 Ustrcmp(argv[i], "transport") == 0 ||
4577 Ustrcmp(argv[i], "authenticator") == 0 ||
4578 Ustrcmp(argv[i], "macro") == 0 ||
4579 Ustrcmp(argv[i], "environment") == 0))
4581 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4585 fail = !readconf_print(argv[i], NULL, flag_n);
4587 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4592 set_process_info("listing config");
4593 exim_exit(readconf_print(US"config", NULL, flag_n)
4594 ? EXIT_SUCCESS : EXIT_FAILURE);
4598 /* Initialise subsystems as required. */
4602 /* Handle a request to deliver one or more messages that are already on the
4603 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4604 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4606 Delivery of specific messages is typically used for a small number when
4607 prodding by hand (when the option forced_delivery will be set) or when
4608 re-execing to regain root privilege. Each message delivery must happen in a
4609 separate process, so we fork a process for each one, and run them sequentially
4610 so that debugging output doesn't get intertwined, and to avoid spawning too
4611 many processes if a long list is given. However, don't fork for the last one;
4612 this saves a process in the common case when Exim is called to deliver just one
4615 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4617 if (prod_requires_admin && !f.admin_user)
4619 fprintf(stderr, "exim: Permission denied\n");
4620 exim_exit(EXIT_FAILURE);
4622 set_process_info("delivering specified messages");
4623 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4624 for (i = msg_action_arg; i < argc; i++)
4628 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4629 that runs into a later copy into the untainted global message_id[] */
4631 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4632 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4634 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4635 exim_underbar_exit(EXIT_SUCCESS);
4639 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4641 exim_exit(EXIT_FAILURE);
4645 exim_exit(EXIT_SUCCESS);
4649 /* If only a single queue run is requested, without SMTP listening, we can just
4650 turn into a queue runner, with an optional starting message id. */
4652 if (queue_interval == 0 && !f.daemon_listen)
4654 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4655 start_queue_run_id ? US" starting at " : US"",
4656 start_queue_run_id ? start_queue_run_id: US"",
4657 stop_queue_run_id ? US" stopping at " : US"",
4658 stop_queue_run_id ? stop_queue_run_id : US"");
4660 set_process_info("running the '%s' queue (single queue run)", queue_name);
4662 set_process_info("running the queue (single queue run)");
4663 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4664 exim_exit(EXIT_SUCCESS);
4668 /* Find the login name of the real user running this process. This is always
4669 needed when receiving a message, because it is written into the spool file. It
4670 may also be used to construct a from: or a sender: header, and in this case we
4671 need the user's full name as well, so save a copy of it, checked for RFC822
4672 syntax and munged if necessary, if it hasn't previously been set by the -F
4673 argument. We may try to get the passwd entry more than once, in case NIS or
4674 other delays are in evidence. Save the home directory for use in filter testing
4679 if ((pw = getpwuid(real_uid)) != NULL)
4681 originator_login = string_copy(US pw->pw_name);
4682 originator_home = string_copy(US pw->pw_dir);
4684 /* If user name has not been set by -F, set it from the passwd entry
4685 unless -f has been used to set the sender address by a trusted user. */
4687 if (!originator_name)
4689 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4691 uschar *name = US pw->pw_gecos;
4692 uschar *amp = Ustrchr(name, '&');
4695 /* Most Unix specify that a '&' character in the gecos field is
4696 replaced by a copy of the login name, and some even specify that
4697 the first character should be upper cased, so that's what we do. */
4702 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4703 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4704 buffer[loffset] = toupper(buffer[loffset]);
4708 /* If a pattern for matching the gecos field was supplied, apply
4709 it and then expand the name string. */
4711 if (gecos_pattern && gecos_name)
4714 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4716 if (regex_match_and_setup(re, name, 0, -1))
4718 uschar *new_name = expand_string(gecos_name);
4722 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4723 "gecos field \"%s\"\n", new_name, name);
4726 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4727 "\"%s\": %s\n", gecos_name, expand_string_message);
4729 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4730 "gecos field \"%s\"\n", gecos_pattern, name);
4731 store_free((void *)re);
4733 originator_name = string_copy(name);
4736 /* A trusted caller has used -f but not -F */
4738 else originator_name = US"";
4741 /* Break the retry loop */
4746 if (++i > finduser_retries) break;
4750 /* If we cannot get a user login, log the incident and give up, unless the
4751 configuration specifies something to use. When running in the test harness,
4752 any setting of unknown_login overrides the actual name. */
4754 if (originator_login == NULL || f.running_in_test_harness)
4756 if (unknown_login != NULL)
4758 originator_login = expand_string(unknown_login);
4759 if (originator_name == NULL && unknown_username != NULL)
4760 originator_name = expand_string(unknown_username);
4761 if (originator_name == NULL) originator_name = US"";
4763 if (originator_login == NULL)
4764 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4768 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4771 originator_name = string_copy(parse_fix_phrase(originator_name,
4772 Ustrlen(originator_name), big_buffer, big_buffer_size));
4774 /* If a message is created by this call of Exim, the uid/gid of its originator
4775 are those of the caller. These values are overridden if an existing message is
4776 read in from the spool. */
4778 originator_uid = real_uid;
4779 originator_gid = real_gid;
4781 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4782 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4784 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4785 returns. We leave this till here so that the originator_ fields are available
4786 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4789 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4793 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4794 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4795 "mua_wrapper is set");
4798 # ifndef DISABLE_TLS
4799 /* This also checks that the library linkage is working and we can call
4800 routines in it, so call even if tls_require_ciphers is unset */
4802 # ifdef MEASURE_TIMING
4803 struct timeval t0, diff;
4804 (void)gettimeofday(&t0, NULL);
4806 if (!tls_dropprivs_validate_require_cipher(FALSE))
4808 # ifdef MEASURE_TIMING
4809 report_time_since(&t0, US"validate_ciphers (delta)");
4817 /* If the sender ident has not been set (by a trusted caller) set it to
4818 the caller. This will get overwritten below for an inetd call. If a trusted
4819 caller has set it empty, unset it. */
4821 if (!sender_ident) sender_ident = originator_login;
4822 else if (!*sender_ident) sender_ident = NULL;
4824 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4825 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4826 originator_* variables set. */
4828 if (test_rewrite_arg >= 0)
4830 f.really_exim = FALSE;
4831 if (test_rewrite_arg >= argc)
4833 printf("-brw needs an address argument\n");
4834 exim_exit(EXIT_FAILURE);
4836 rewrite_test(argv[test_rewrite_arg]);
4837 exim_exit(EXIT_SUCCESS);
4840 /* A locally-supplied message is considered to be coming from a local user
4841 unless a trusted caller supplies a sender address with -f, or is passing in the
4842 message via SMTP (inetd invocation or otherwise). */
4844 if ( !sender_address && !smtp_input
4845 || !f.trusted_caller && filter_test == FTEST_NONE)
4847 f.sender_local = TRUE;
4849 /* A trusted caller can supply authenticated_sender and authenticated_id
4850 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4851 defaults except when host checking. */
4853 if (!authenticated_sender && !host_checking)
4854 authenticated_sender = string_sprintf("%s@%s", originator_login,
4855 qualify_domain_sender);
4856 if (!authenticated_id && !host_checking)
4857 authenticated_id = originator_login;
4860 /* Trusted callers are always permitted to specify the sender address.
4861 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4862 is specified is the empty address. However, if a trusted caller does not
4863 specify a sender address for SMTP input, we leave sender_address unset. This
4864 causes the MAIL commands to be honoured. */
4866 if ( !smtp_input && !sender_address
4867 || !receive_check_set_sender(sender_address))
4869 /* Either the caller is not permitted to set a general sender, or this is
4870 non-SMTP input and the trusted caller has not set a sender. If there is no
4871 sender, or if a sender other than <> is set, override with the originator's
4872 login (which will get qualified below), except when checking things. */
4874 if ( !sender_address /* No sender_address set */
4876 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4877 !checking)) /* Not running tests, including filter tests */
4879 sender_address = originator_login;
4880 f.sender_address_forced = FALSE;
4881 sender_address_domain = 0;
4885 /* Remember whether an untrusted caller set the sender address */
4887 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4889 /* Ensure that the sender address is fully qualified unless it is the empty
4890 address, which indicates an error message, or doesn't exist (root caller, smtp
4891 interface, no -f argument). */
4893 if (sender_address && *sender_address && sender_address_domain == 0)
4894 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4895 qualify_domain_sender);
4897 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4899 /* Handle a request to verify a list of addresses, or test them for delivery.
4900 This must follow the setting of the sender address, since routers can be
4901 predicated upon the sender. If no arguments are given, read addresses from
4902 stdin. Set debug_level to at least D_v to get full output for address testing.
4905 if (verify_address_mode || f.address_test_mode)
4908 int flags = vopt_qualify;
4910 if (verify_address_mode)
4912 if (!verify_as_sender) flags |= vopt_is_recipient;
4913 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4918 flags |= vopt_is_recipient;
4919 debug_selector |= D_v;
4920 debug_file = stderr;
4921 debug_fd = fileno(debug_file);
4922 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4925 if (recipients_arg < argc)
4926 while (recipients_arg < argc)
4928 /* Supplied addresses are tainted since they come from a user */
4929 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4932 BOOL finished = FALSE;
4933 uschar *ss = parse_find_address_end(s, FALSE);
4934 if (*ss == ',') *ss = 0; else finished = TRUE;
4935 test_address(s, flags, &exit_value);
4938 while (*++s == ',' || isspace(*s)) ;
4944 uschar * s = get_stdinput(NULL, NULL);
4946 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4950 exim_exit(exit_value);
4953 /* Handle expansion checking. Either expand items on the command line, or read
4954 from stdin if there aren't any. If -Mset was specified, load the message so
4955 that its variables can be used, but restrict this facility to admin users.
4956 Otherwise, if -bem was used, read a message from stdin. */
4960 dns_init(FALSE, FALSE, FALSE);
4961 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4963 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4965 exim_fail("exim: permission denied\n");
4966 message_id = argv[msg_action_arg];
4967 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4968 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4969 printf ("Failed to load message datafile %s\n", message_id);
4970 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4971 printf ("Failed to load message %s\n", message_id);
4974 /* Read a test message from a file. We fudge it up to be on stdin, saving
4975 stdin itself for later reading of expansion strings. */
4977 else if (expansion_test_message)
4979 int save_stdin = dup(0);
4980 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4982 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4985 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4986 message_ended = END_NOTENDED;
4987 read_message_body(receive_msg(extract_recipients));
4988 message_linecount += body_linecount;
4989 (void)dup2(save_stdin, 0);
4990 (void)close(save_stdin);
4991 clearerr(stdin); /* Required by Darwin */
4994 /* Only admin users may see config-file macros this way */
4996 if (!f.admin_user) macros_user = macros = mlast = NULL;
4998 /* Allow $recipients for this testing */
5000 f.enable_dollar_recipients = TRUE;
5002 /* Expand command line items */
5004 if (recipients_arg < argc)
5005 while (recipients_arg < argc)
5006 expansion_test_line(argv[recipients_arg++]);
5012 char *(*fn_readline)(const char *) = NULL;
5013 void (*fn_addhist)(const char *) = NULL;
5017 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5020 while (s = get_stdinput(fn_readline, fn_addhist))
5021 expansion_test_line(s);
5024 if (dlhandle) dlclose(dlhandle);
5028 /* The data file will be open after -Mset */
5030 if (deliver_datafile >= 0)
5032 (void)close(deliver_datafile);
5033 deliver_datafile = -1;
5036 exim_exit(EXIT_SUCCESS);
5040 /* The active host name is normally the primary host name, but it can be varied
5041 for hosts that want to play several parts at once. We need to ensure that it is
5042 set for host checking, and for receiving messages. */
5044 smtp_active_hostname = primary_hostname;
5045 if (raw_active_hostname != NULL)
5047 uschar *nah = expand_string(raw_active_hostname);
5050 if (!f.expand_string_forcedfail)
5051 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5052 "(smtp_active_hostname): %s", raw_active_hostname,
5053 expand_string_message);
5055 else if (nah[0] != 0) smtp_active_hostname = nah;
5058 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5059 given IP address so that the blocking and relay configuration can be tested.
5060 Unless a sender_ident was set by -oMt, we discard it (the default is the
5061 caller's login name). An RFC 1413 call is made only if we are running in the
5062 test harness and an incoming interface and both ports are specified, because
5063 there is no TCP/IP call to find the ident for. */
5070 if (!sender_ident_set)
5072 sender_ident = NULL;
5073 if (f.running_in_test_harness && sender_host_port
5074 && interface_address && interface_port)
5075 verify_get_ident(1223); /* note hardwired port number */
5078 /* In case the given address is a non-canonical IPv6 address, canonicalize
5079 it. The code works for both IPv4 and IPv6, as it happens. */
5081 size = host_aton(sender_host_address, x);
5082 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5083 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5085 /* Now set up for testing */
5087 host_build_sender_fullhost();
5091 f.sender_local = FALSE;
5092 f.sender_host_notsocket = TRUE;
5093 debug_file = stderr;
5094 debug_fd = fileno(debug_file);
5095 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5096 "**** but without any ident (RFC 1413) callback.\n"
5097 "**** This is not for real!\n\n",
5098 sender_host_address);
5100 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5101 if (verify_check_host(&hosts_connection_nolog) == OK)
5102 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5103 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5105 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5106 because a log line has already been written for all its failure exists
5107 (usually "connection refused: <reason>") and writing another one is
5108 unnecessary clutter. */
5110 if (smtp_start_session())
5113 for (; (reset_point = store_mark()); store_reset(reset_point))
5115 if (smtp_setup_msg() <= 0) break;
5116 if (!receive_msg(FALSE)) break;
5118 return_path = sender_address = NULL;
5119 dnslist_domain = dnslist_matched = NULL;
5120 #ifndef DISABLE_DKIM
5121 dkim_cur_signer = NULL;
5124 deliver_localpart_orig = NULL;
5125 deliver_domain_orig = NULL;
5126 callout_address = sending_ip_address = NULL;
5127 deliver_localpart_data = deliver_domain_data =
5128 recipient_data = sender_data = NULL;
5129 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5133 exim_exit(EXIT_SUCCESS);
5137 /* Arrange for message reception if recipients or SMTP were specified;
5138 otherwise complain unless a version print (-bV) happened or this is a filter
5139 verification test or info dump.
5140 In the former case, show the configuration file name. */
5142 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5144 if (version_printed)
5146 if (Ustrchr(config_main_filelist, ':'))
5147 printf("Configuration file search path is %s\n", config_main_filelist);
5148 printf("Configuration file is %s\n", config_main_filename);
5149 return EXIT_SUCCESS;
5152 if (info_flag != CMDINFO_NONE)
5154 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5155 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5158 if (filter_test == FTEST_NONE)
5159 exim_usage(called_as);
5163 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5164 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5165 that we are not called from inetd, because that is rejected above. The
5166 following configuration settings are forced here:
5168 (1) Synchronous delivery (-odi)
5169 (2) Errors to stderr (-oep == -oeq)
5170 (3) No parallel remote delivery
5171 (4) Unprivileged delivery
5173 We don't force overall queueing options because there are several of them;
5174 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5175 to override any SMTP queueing. */
5179 f.synchronous_delivery = TRUE;
5180 arg_error_handling = ERRORS_STDERR;
5181 remote_max_parallel = 1;
5182 deliver_drop_privilege = TRUE;
5183 f.queue_smtp = FALSE;
5184 queue_smtp_domains = NULL;
5186 message_utf8_downconvert = -1; /* convert-if-needed */
5191 /* Prepare to accept one or more new messages on the standard input. When a
5192 message has been read, its id is returned in message_id[]. If doing immediate
5193 delivery, we fork a delivery process for each received message, except for the
5194 last one, where we can save a process switch.
5196 It is only in non-smtp mode that error_handling is allowed to be changed from
5197 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5198 sendmail error modes other than -oem ever actually used? Later: yes.) */
5200 if (!smtp_input) error_handling = arg_error_handling;
5202 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5203 logging being sent down the socket and make an identd call to get the
5206 else if (f.is_inetd)
5208 (void)fclose(stderr);
5209 exim_nullstd(); /* Re-open to /dev/null */
5210 verify_get_ident(IDENT_PORT);
5211 host_build_sender_fullhost();
5212 set_process_info("handling incoming connection from %s via inetd",
5216 /* If the sender host address has been set, build sender_fullhost if it hasn't
5217 already been done (which it will have been for inetd). This caters for the
5218 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5219 so that the test for IP options is skipped for -bs input. */
5221 if (sender_host_address && !sender_fullhost)
5223 host_build_sender_fullhost();
5224 set_process_info("handling incoming connection from %s via -oMa",
5226 f.sender_host_notsocket = TRUE;
5229 /* Otherwise, set the sender host as unknown except for inetd calls. This
5230 prevents host checking in the case of -bs not from inetd and also for -bS. */
5232 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5234 /* If stdout does not exist, then dup stdin to stdout. This can happen
5235 if exim is started from inetd. In this case fd 0 will be set to the socket,
5236 but fd 1 will not be set. This also happens for passed SMTP channels. */
5238 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5240 /* Set up the incoming protocol name and the state of the program. Root is
5241 allowed to force received protocol via the -oMr option above. If we have come
5242 via inetd, the process info has already been set up. We don't set
5243 received_protocol here for smtp input, as it varies according to
5244 batch/HELO/EHLO/AUTH/TLS. */
5248 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5249 smtp_batched_input? "batched " : "",
5250 (sender_address!= NULL)? sender_address : originator_login);
5254 int old_pool = store_pool;
5255 store_pool = POOL_PERM;
5256 if (!received_protocol)
5257 received_protocol = string_sprintf("local%s", called_as);
5258 store_pool = old_pool;
5259 set_process_info("accepting a local non-SMTP message from <%s>",
5263 /* Initialize the session_local_queue-only flag (this will be ignored if
5264 mua_wrapper is set) */
5267 session_local_queue_only = queue_only;
5269 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5270 the spool if so configured. On failure, we must not attempt to send an error
5271 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5272 error code is given.) */
5274 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5275 exim_fail("exim: insufficient disk space\n");
5277 /* If this is smtp input of any kind, real or batched, handle the start of the
5280 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5281 because a log line has already been written for all its failure exists
5282 (usually "connection refused: <reason>") and writing another one is
5283 unnecessary clutter. */
5289 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5290 if (verify_check_host(&hosts_connection_nolog) == OK)
5291 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5292 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5293 if (!smtp_start_session())
5296 exim_exit(EXIT_SUCCESS);
5300 /* Otherwise, set up the input size limit here. */
5304 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5305 if (expand_string_message)
5306 if (thismessage_size_limit == -1)
5307 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5308 "message_size_limit: %s", expand_string_message);
5310 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5311 "message_size_limit: %s", expand_string_message);
5314 /* Loop for several messages when reading SMTP input. If we fork any child
5315 processes, we don't want to wait for them unless synchronous delivery is
5316 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5317 same as SIG_DFL, despite the fact that documentation often lists the default as
5318 "ignore". This is a confusing area. This is what I know:
5320 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5321 processes that complete simply to go away without ever becoming defunct. You
5322 can't then wait for them - but we don't want to wait for them in the
5323 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5324 happen for all OS (e.g. *BSD is different).
5326 But that's not the end of the story. Some (many? all?) systems have the
5327 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5328 has by default, so it seems that the difference is merely one of default
5329 (compare restarting vs non-restarting signals).
5331 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5332 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5333 of the loop below. Paranoia rules.
5335 February 2003: That's *still* not the end of the story. There are now versions
5336 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5337 process then calls waitpid(), a grumble is written to the system log, because
5338 this is logically inconsistent. In other words, it doesn't like the paranoia.
5339 As a consequence of this, the waitpid() below is now excluded if we are sure
5340 that SIG_IGN works. */
5342 if (!f.synchronous_delivery)
5345 struct sigaction act;
5346 act.sa_handler = SIG_IGN;
5347 sigemptyset(&(act.sa_mask));
5348 act.sa_flags = SA_NOCLDWAIT;
5349 sigaction(SIGCHLD, &act, NULL);
5351 signal(SIGCHLD, SIG_IGN);
5355 /* Save the current store pool point, for resetting at the start of
5356 each message, and save the real sender address, if any. */
5358 real_sender_address = sender_address;
5360 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5361 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5366 rmark reset_point = store_mark();
5369 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5370 input and build the recipients list, before calling receive_msg() to read the
5371 message proper. Whatever sender address is given in the SMTP transaction is
5372 often ignored for local senders - we use the actual sender, which is normally
5373 either the underlying user running this process or a -f argument provided by
5374 a trusted caller. It is saved in real_sender_address. The test for whether to
5375 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5380 if ((rc = smtp_setup_msg()) > 0)
5382 if (real_sender_address != NULL &&
5383 !receive_check_set_sender(sender_address))
5385 sender_address = raw_sender = real_sender_address;
5386 sender_address_unrewritten = NULL;
5389 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5390 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5391 the very end. The result of the ACL is ignored (as for other non-SMTP
5392 messages). It is run for its potential side effects. */
5394 if (smtp_batched_input && acl_not_smtp_start != NULL)
5396 uschar *user_msg, *log_msg;
5397 f.enable_dollar_recipients = TRUE;
5398 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5399 &user_msg, &log_msg);
5400 f.enable_dollar_recipients = FALSE;
5403 /* Now get the data for the message */
5405 more = receive_msg(extract_recipients);
5406 if (message_id[0] == 0)
5408 cancel_cutthrough_connection(TRUE, US"receive dropped");
5409 if (more) goto moreloop;
5410 smtp_log_no_mail(); /* Log no mail if configured */
5411 exim_exit(EXIT_FAILURE);
5416 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5417 smtp_log_no_mail(); /* Log no mail if configured */
5418 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5422 /* In the non-SMTP case, we have all the information from the command
5423 line, but must process it in case it is in the more general RFC822
5424 format, and in any case, to detect syntax errors. Also, it appears that
5425 the use of comma-separated lists as single arguments is common, so we
5426 had better support them. */
5431 int count = argc - recipients_arg;
5432 uschar **list = argv + recipients_arg;
5434 /* These options cannot be changed dynamically for non-SMTP messages */
5436 f.active_local_sender_retain = local_sender_retain;
5437 f.active_local_from_check = local_from_check;
5439 /* Save before any rewriting */
5441 raw_sender = string_copy(sender_address);
5443 /* Loop for each argument (supplied by user hence tainted) */
5445 for (int i = 0; i < count; i++)
5447 int start, end, domain;
5449 uschar * s = string_copy_taint(list[i], TRUE);
5451 /* Loop for each comma-separated address */
5455 BOOL finished = FALSE;
5457 uschar *ss = parse_find_address_end(s, FALSE);
5459 if (*ss == ',') *ss = 0; else finished = TRUE;
5461 /* Check max recipients - if -t was used, these aren't recipients */
5463 if (recipients_max > 0 && ++rcount > recipients_max &&
5464 !extract_recipients)
5465 if (error_handling == ERRORS_STDERR)
5467 fprintf(stderr, "exim: too many recipients\n");
5468 exim_exit(EXIT_FAILURE);
5472 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5473 errors_sender_rc : EXIT_FAILURE;
5477 BOOL b = allow_utf8_domains;
5478 allow_utf8_domains = TRUE;
5481 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5484 if (string_is_utf8(recipient))
5485 message_smtputf8 = TRUE;
5487 allow_utf8_domains = b;
5490 if (domain == 0 && !f.allow_unqualified_recipient)
5493 errmess = US"unqualified recipient address not allowed";
5497 if (error_handling == ERRORS_STDERR)
5499 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5500 string_printing(list[i]), errmess);
5501 exim_exit(EXIT_FAILURE);
5507 eblock.text1 = string_printing(list[i]);
5508 eblock.text2 = errmess;
5510 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5511 errors_sender_rc : EXIT_FAILURE;
5514 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5517 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5521 /* Show the recipients when debugging */
5525 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5526 if (recipients_list)
5528 debug_printf("Recipients:\n");
5529 for (int i = 0; i < recipients_count; i++)
5530 debug_printf(" %s\n", recipients_list[i].address);
5534 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5535 ignored; rejecting here would just add complication, and it can just as
5536 well be done later. Allow $recipients to be visible in the ACL. */
5538 if (acl_not_smtp_start)
5540 uschar *user_msg, *log_msg;
5541 f.enable_dollar_recipients = TRUE;
5542 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5543 &user_msg, &log_msg);
5544 f.enable_dollar_recipients = FALSE;
5547 /* Pause for a while waiting for input. If none received in that time,
5548 close the logfile, if we had one open; then if we wait for a long-running
5549 datasource (months, in one use-case) log rotation will not leave us holding
5552 if (!receive_timeout)
5554 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5557 FD_ZERO(&r); FD_SET(0, &r);
5558 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5561 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5562 will just read the headers for the message, and not write anything onto the
5565 message_ended = END_NOTENDED;
5566 more = receive_msg(extract_recipients);
5568 /* more is always FALSE here (not SMTP message) when reading a message
5569 for real; when reading the headers of a message for filter testing,
5570 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5572 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5573 } /* Non-SMTP message reception */
5575 /* If this is a filter testing run, there are headers in store, but
5576 no message on the spool. Run the filtering code in testing mode, setting
5577 the domain to the qualify domain and the local part to the current user,
5578 unless they have been set by options. The prefix and suffix are left unset
5579 unless specified. The the return path is set to to the sender unless it has
5580 already been set from a return-path header in the message. */
5582 if (filter_test != FTEST_NONE)
5584 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5585 deliver_domain_orig = deliver_domain;
5586 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5587 deliver_localpart_orig = deliver_localpart;
5588 deliver_localpart_prefix = ftest_prefix;
5589 deliver_localpart_suffix = ftest_suffix;
5590 deliver_home = originator_home;
5594 printf("Return-path copied from sender\n");
5595 return_path = string_copy(sender_address);
5598 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5599 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5601 receive_add_recipient(
5602 string_sprintf("%s%s%s@%s",
5603 ftest_prefix ? ftest_prefix : US"",
5605 ftest_suffix ? ftest_suffix : US"",
5606 deliver_domain), -1);
5608 printf("Recipient = %s\n", recipients_list[0].address);
5609 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5610 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5612 if (chdir("/")) /* Get away from wherever the user is running this from */
5614 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5615 exim_exit(EXIT_FAILURE);
5618 /* Now we run either a system filter test, or a user filter test, or both.
5619 In the latter case, headers added by the system filter will persist and be
5620 available to the user filter. We need to copy the filter variables
5623 if (filter_test & FTEST_SYSTEM)
5624 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5625 exim_exit(EXIT_FAILURE);
5627 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5629 if (filter_test & FTEST_USER)
5630 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5631 exim_exit(EXIT_FAILURE);
5633 exim_exit(EXIT_SUCCESS);
5636 /* Else act on the result of message reception. We should not get here unless
5637 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5638 will be TRUE. If it is not, check on the number of messages received in this
5641 if ( !session_local_queue_only
5642 && smtp_accept_queue_per_connection > 0
5643 && receive_messagecount > smtp_accept_queue_per_connection)
5645 session_local_queue_only = TRUE;
5646 queue_only_reason = 2;
5649 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5650 and queue_only_load is set, check that the load average is below it. If it is
5651 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5652 default), we put the whole session into queue_only mode. It then remains this
5653 way for any subsequent messages on the same SMTP connection. This is a
5654 deliberate choice; even though the load average may fall, it doesn't seem
5655 right to deliver later messages on the same call when not delivering earlier
5656 ones. However, there are odd cases where this is not wanted, so this can be
5657 changed by setting queue_only_load_latch false. */
5659 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5660 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5662 queue_only_reason = 3;
5663 if (queue_only_load_latch) session_local_queue_only = TRUE;
5666 /* If running as an MUA wrapper, all queueing options and freezing options
5670 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5672 /* Log the queueing here, when it will get a message id attached, but
5673 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5676 if (local_queue_only)
5678 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5679 switch(queue_only_reason)
5682 log_write(L_delay_delivery,
5683 LOG_MAIN, "no immediate delivery: more than %d messages "
5684 "received in one connection", smtp_accept_queue_per_connection);
5688 log_write(L_delay_delivery,
5689 LOG_MAIN, "no immediate delivery: load average %.2f",
5690 (double)load_average/1000.0);
5695 else if (f.queue_only_policy || f.deliver_freeze)
5696 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5698 /* Else do the delivery unless the ACL or local_scan() called for queue only
5699 or froze the message. Always deliver in a separate process. A fork failure is
5700 not a disaster, as the delivery will eventually happen on a subsequent queue
5701 run. The search cache must be tidied before the fork, as the parent will
5702 do it before exiting. The child will trigger a lookup failure and
5703 thereby defer the delivery if it tries to use (for example) a cached ldap
5704 connection that the parent has called unbind on. */
5711 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5714 close_unwanted(); /* Close unwanted file descriptors and TLS */
5715 exim_nullstd(); /* Ensure std{in,out,err} exist */
5717 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5718 mode, deliver_drop_privilege is forced TRUE). */
5720 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5722 delivery_re_exec(CEE_EXEC_EXIT);
5723 /* Control does not return here. */
5726 /* No need to re-exec */
5728 rc = deliver_message(message_id, FALSE, FALSE);
5730 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5731 ? EXIT_SUCCESS : EXIT_FAILURE);
5736 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5737 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5738 "process: %s", strerror(errno));
5742 release_cutthrough_connection(US"msg passed for delivery");
5744 /* In the parent, wait if synchronous delivery is required. This will
5745 always be the case in MUA wrapper mode. */
5747 if (f.synchronous_delivery)
5750 while (wait(&status) != pid);
5751 if ((status & 0x00ff) != 0)
5752 log_write(0, LOG_MAIN|LOG_PANIC,
5753 "process %d crashed with signal %d while delivering %s",
5754 (int)pid, status & 0x00ff, message_id);
5755 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5760 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5761 automatically reaps children (see comments above the loop), clear away any
5762 finished subprocesses here, in case there are lots of messages coming in
5763 from the same source. */
5765 #ifndef SIG_IGN_WORKS
5766 while (waitpid(-1, NULL, WNOHANG) > 0);
5770 return_path = sender_address = NULL;
5771 authenticated_sender = NULL;
5772 deliver_localpart_orig = NULL;
5773 deliver_domain_orig = NULL;
5774 deliver_host = deliver_host_address = NULL;
5775 dnslist_domain = dnslist_matched = NULL;
5776 #ifdef WITH_CONTENT_SCAN
5777 malware_name = NULL;
5779 callout_address = NULL;
5780 sending_ip_address = NULL;
5781 deliver_localpart_data = deliver_domain_data =
5782 recipient_data = sender_data = NULL;
5784 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5786 store_reset(reset_point);
5789 exim_exit(EXIT_SUCCESS); /* Never returns */
5790 return 0; /* To stop compiler warning */