1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void * block) {}
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void * block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 /* Amount CLOCK_MONOTONIC is behind realtime, at startup. */
387 static struct timespec offset_ts;
390 exim_clock_init(void)
393 if (clock_gettime(CLOCK_MONOTONIC, &offset_ts) != 0) return;
394 (void)gettimeofday(&tv, NULL);
395 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
396 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
397 if (offset_ts.tv_nsec >= 0) return;
399 offset_ts.tv_nsec += 1000*1000*1000;
404 /* Exim uses a time + a pid to generate a unique identifier in two places: its
405 message IDs, and in file names for maildir deliveries. Because some OS now
406 re-use pids within the same second, sub-second times are now being used.
407 However, for absolute certainty, we must ensure the clock has ticked before
408 allowing the relevant process to complete. At the time of implementation of
409 this code (February 2003), the speed of processors is such that the clock will
410 invariably have ticked already by the time a process has done its job. This
411 function prepares for the time when things are faster - and it also copes with
412 clocks that go backwards.
415 tgt_tv A timeval which was used to create uniqueness; its usec field
416 has been rounded down to the value of the resolution.
417 We want to be sure the current time is greater than this.
418 resolution The resolution that was used to divide the microseconds
419 (1 for maildir, larger for message ids)
425 exim_wait_tick(struct timeval * tgt_tv, int resolution)
427 struct timeval now_tv;
428 long int now_true_usec;
430 #ifdef _POSIX_MONOTONIC_CLOCK
431 struct timespec now_ts;
433 if (clock_gettime(CLOCK_MONOTONIC, &now_ts) == 0)
435 now_ts.tv_sec += offset_ts.tv_sec;
436 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
439 now_ts.tv_nsec -= 1000*1000*1000;
441 now_tv.tv_sec = now_ts.tv_sec;
442 now_true_usec = (now_ts.tv_nsec / (resolution * 1000)) * resolution;
443 now_tv.tv_usec = now_true_usec;
448 (void)gettimeofday(&now_tv, NULL);
449 now_true_usec = now_tv.tv_usec;
450 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
453 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
455 struct itimerval itval;
456 itval.it_interval.tv_sec = 0;
457 itval.it_interval.tv_usec = 0;
458 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
459 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
461 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
462 negative value for the microseconds is possible only in the case when "now"
463 is more than a second less than "tgt". That means that itval.it_value.tv_sec
464 is greater than zero. The following correction is therefore safe. */
466 if (itval.it_value.tv_usec < 0)
468 itval.it_value.tv_usec += 1000000;
469 itval.it_value.tv_sec -= 1;
472 DEBUG(D_transport|D_receive)
474 if (!f.running_in_test_harness)
476 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
477 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
478 now_tv.tv_sec, (long) now_tv.tv_usec);
479 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
480 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
486 /* Be prapared to go around if the kernel does not implement subtick
487 granularity (GNU Hurd) */
489 (void)gettimeofday(&now_tv, NULL);
490 now_true_usec = now_tv.tv_usec;
491 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
498 /*************************************************
499 * Call fopen() with umask 777 and adjust mode *
500 *************************************************/
502 /* Exim runs with umask(0) so that files created with open() have the mode that
503 is specified in the open() call. However, there are some files, typically in
504 the spool directory, that are created with fopen(). They end up world-writeable
505 if no precautions are taken. Although the spool directory is not accessible to
506 the world, this is an untidiness. So this is a wrapper function for fopen()
507 that sorts out the mode of the created file.
510 filename the file name
511 options the fopen() options
512 mode the required mode
514 Returns: the fopened FILE or NULL
518 modefopen(const uschar *filename, const char *options, mode_t mode)
520 mode_t saved_umask = umask(0777);
521 FILE *f = Ufopen(filename, options);
522 (void)umask(saved_umask);
523 if (f != NULL) (void)fchmod(fileno(f), mode);
528 /*************************************************
529 * Ensure stdin, stdout, and stderr exist *
530 *************************************************/
532 /* Some operating systems grumble if an exec() happens without a standard
533 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
534 file will be opened and will use these fd values, and then some other bit of
535 code will assume, for example, that it can write error messages to stderr.
536 This function ensures that fds 0, 1, and 2 are open if they do not already
537 exist, by connecting them to /dev/null.
539 This function is also used to ensure that std{in,out,err} exist at all times,
540 so that if any library that Exim calls tries to use them, it doesn't crash.
551 for (int i = 0; i <= 2; i++)
553 if (fstat(i, &statbuf) < 0 && errno == EBADF)
555 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
556 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
557 string_open_failed(errno, "/dev/null", NULL));
558 if (devnull != i) (void)dup2(devnull, i);
561 if (devnull > 2) (void)close(devnull);
567 /*************************************************
568 * Close unwanted file descriptors for delivery *
569 *************************************************/
571 /* This function is called from a new process that has been forked to deliver
572 an incoming message, either directly, or using exec.
574 We want any smtp input streams to be closed in this new process. However, it
575 has been observed that using fclose() here causes trouble. When reading in -bS
576 input, duplicate copies of messages have been seen. The files will be sharing a
577 file pointer with the parent process, and it seems that fclose() (at least on
578 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
579 least sometimes. Hence we go for closing the underlying file descriptors.
581 If TLS is active, we want to shut down the TLS library, but without molesting
582 the parent's SSL connection.
584 For delivery of a non-SMTP message, we want to close stdin and stdout (and
585 stderr unless debugging) because the calling process might have set them up as
586 pipes and be waiting for them to close before it waits for the submission
587 process to terminate. If they aren't closed, they hold up the calling process
588 until the initial delivery process finishes, which is not what we want.
590 Exception: We do want it for synchronous delivery!
592 And notwithstanding all the above, if D_resolver is set, implying resolver
593 debugging, leave stdout open, because that's where the resolver writes its
596 When we close stderr (which implies we've also closed stdout), we also get rid
597 of any controlling terminal.
609 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
611 (void)close(fileno(smtp_in));
612 (void)close(fileno(smtp_out));
617 (void)close(0); /* stdin */
618 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
619 if (debug_selector == 0) /* stderr */
621 if (!f.synchronous_delivery)
634 /*************************************************
636 *************************************************/
638 /* This function sets a new uid and gid permanently, optionally calling
639 initgroups() to set auxiliary groups. There are some special cases when running
640 Exim in unprivileged modes. In these situations the effective uid will not be
641 root; if we already have the right effective uid/gid, and don't need to
642 initialize any groups, leave things as they are.
647 igflag TRUE if initgroups() wanted
648 msg text to use in debugging output and failure log
650 Returns: nothing; bombs out on failure
654 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
656 uid_t euid = geteuid();
657 gid_t egid = getegid();
659 if (euid == root_uid || euid != uid || egid != gid || igflag)
661 /* At least one OS returns +1 for initgroups failure, so just check for
666 struct passwd *pw = getpwuid(uid);
668 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
669 "no passwd entry for uid=%ld", (long int)uid);
671 if (initgroups(pw->pw_name, gid) != 0)
672 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
673 (long int)uid, strerror(errno));
676 if (setgid(gid) < 0 || setuid(uid) < 0)
677 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
678 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
681 /* Debugging output included uid/gid and all groups */
685 int group_count, save_errno;
686 gid_t group_list[EXIM_GROUPLIST_SIZE];
687 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
688 (long int)geteuid(), (long int)getegid(), (long int)getpid());
689 group_count = getgroups(nelem(group_list), group_list);
691 debug_printf(" auxiliary group list:");
693 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
694 else if (group_count < 0)
695 debug_printf(" <error: %s>", strerror(save_errno));
696 else debug_printf(" <none>");
704 /*************************************************
706 *************************************************/
708 /* Exim exits via this function so that it always clears up any open
714 Returns: does not return
723 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
724 ">>>>>>>>>>>>>>>>\n",
725 (int)getpid(), process_purpose, rc);
731 exim_underbar_exit(int rc)
735 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
736 ">>>>>>>>>>>>>>>>\n",
737 (int)getpid(), process_purpose, rc);
743 /* Print error string, then die */
745 exim_fail(const char * fmt, ...)
749 vfprintf(stderr, fmt, ap);
753 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
754 of chown()/fchown(). See src/functions.h for more explanation */
756 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
758 int saved_errno = errno; /* from the preceeding chown call */
760 log_write(0, LOG_MAIN|LOG_PANIC,
761 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
762 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
763 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
765 /* I leave this here, commented, in case the "bug"(?) comes up again.
766 It is not an Exim bug, but we can provide a workaround.
772 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
774 if (buf.st_uid == owner && buf.st_gid == group) return 0;
775 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
777 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
785 /*************************************************
786 * Extract port from host address *
787 *************************************************/
789 /* Called to extract the port from the values given to -oMa and -oMi.
790 It also checks the syntax of the address, and terminates it before the
791 port data when a port is extracted.
794 address the address, with possible port on the end
796 Returns: the port, or zero if there isn't one
797 bombs out on a syntax error
801 check_port(uschar *address)
803 int port = host_address_extract_port(address);
804 if (string_is_ip_address(address, NULL) == 0)
805 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
811 /*************************************************
812 * Test/verify an address *
813 *************************************************/
815 /* This function is called by the -bv and -bt code. It extracts a working
816 address from a full RFC 822 address. This isn't really necessary per se, but it
817 has the effect of collapsing source routes.
821 flags flag bits for verify_address()
822 exit_value to be set for failures
828 test_address(uschar *s, int flags, int *exit_value)
830 int start, end, domain;
831 uschar *parse_error = NULL;
832 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
836 fprintf(stdout, "syntax error: %s\n", parse_error);
841 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
842 -1, -1, NULL, NULL, NULL);
843 if (rc == FAIL) *exit_value = 2;
844 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
850 /*************************************************
851 * Show supported features *
852 *************************************************/
855 show_db_version(FILE * f)
857 #ifdef DB_VERSION_STRING
860 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
861 fprintf(f, " Runtime: %s\n",
862 db_version(NULL, NULL, NULL));
865 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
867 #elif defined(BTREEVERSION) && defined(HASHVERSION)
869 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
871 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
874 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
875 fprintf(f, "Probably ndbm\n");
876 #elif defined(USE_TDB)
877 fprintf(f, "Using tdb\n");
880 fprintf(f, "Probably GDBM (native mode)\n");
882 fprintf(f, "Probably GDBM (compatibility mode)\n");
888 /* This function is called for -bV/--version and for -d to output the optional
889 features of the current Exim binary.
891 Arguments: a FILE for printing
896 show_whats_supported(FILE * fp)
898 rmark reset_point = store_mark();
900 DEBUG(D_any) {} else show_db_version(fp);
902 g = string_cat(NULL, US"Support for:");
903 #ifdef SUPPORT_CRYPTEQ
904 g = string_cat(g, US" crypteq");
907 g = string_cat(g, US" iconv()");
910 g = string_cat(g, US" IPv6");
912 #ifdef HAVE_SETCLASSRESOURCES
913 g = string_cat(g, US" use_setclassresources");
916 g = string_cat(g, US" PAM");
919 g = string_cat(g, US" Perl");
922 g = string_cat(g, US" Expand_dlfunc");
924 #ifdef USE_TCP_WRAPPERS
925 g = string_cat(g, US" TCPwrappers");
928 g = string_cat(g, US" GnuTLS");
931 g = string_cat(g, US" OpenSSL");
933 #ifndef DISABLE_TLS_RESUME
934 g = string_cat(g, US" TLS_resume");
936 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
937 g = string_cat(g, US" translate_ip_address");
939 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
940 g = string_cat(g, US" move_frozen_messages");
942 #ifdef WITH_CONTENT_SCAN
943 g = string_cat(g, US" Content_Scanning");
946 g = string_cat(g, US" DANE");
949 g = string_cat(g, US" DKIM");
952 g = string_cat(g, US" DMARC");
954 #ifndef DISABLE_DNSSEC
955 g = string_cat(g, US" DNSSEC");
957 #ifndef DISABLE_EVENT
958 g = string_cat(g, US" Event");
961 g = string_cat(g, US" I18N");
964 g = string_cat(g, US" OCSP");
966 #ifndef DISABLE_PIPE_CONNECT
967 g = string_cat(g, US" PIPE_CONNECT");
970 g = string_cat(g, US" PRDR");
973 g = string_cat(g, US" PROXY");
975 #ifndef DISABLE_QUEUE_RAMP
976 g = string_cat(g, US" Experimental_Queue_Ramp");
979 g = string_cat(g, US" SOCKS");
982 g = string_cat(g, US" SPF");
984 #if defined(SUPPORT_SRS)
985 g = string_cat(g, US" SRS");
989 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
991 #ifdef EXPERIMENTAL_ARC
992 g = string_cat(g, US" Experimental_ARC");
994 #ifdef EXPERIMENTAL_BRIGHTMAIL
995 g = string_cat(g, US" Experimental_Brightmail");
997 #ifdef EXPERIMENTAL_DCC
998 g = string_cat(g, US" Experimental_DCC");
1000 #ifdef EXPERIMENTAL_DSN_INFO
1001 g = string_cat(g, US" Experimental_DSN_info");
1003 #ifdef EXPERIMENTAL_QUEUEFILE
1004 g = string_cat(g, US" Experimental_QUEUEFILE");
1006 #if defined(EXPERIMENTAL_SRS_ALT)
1007 g = string_cat(g, US" Experimental_SRS");
1009 g = string_cat(g, US"\n");
1011 g = string_cat(g, US"Lookups (built-in):");
1012 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1013 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1015 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1016 g = string_cat(g, US" cdb");
1018 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1019 g = string_cat(g, US" dbm dbmjz dbmnz");
1021 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1022 g = string_cat(g, US" dnsdb");
1024 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1025 g = string_cat(g, US" dsearch");
1027 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1028 g = string_cat(g, US" ibase");
1030 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1031 g = string_cat(g, US" json");
1033 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1034 g = string_cat(g, US" ldap ldapdn ldapm");
1037 g = string_cat(g, US" lmdb");
1039 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1040 g = string_cat(g, US" mysql");
1042 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1043 g = string_cat(g, US" nis nis0");
1045 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1046 g = string_cat(g, US" nisplus");
1048 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1049 g = string_cat(g, US" oracle");
1051 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1052 g = string_cat(g, US" passwd");
1054 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1055 g = string_cat(g, US" pgsql");
1057 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1058 g = string_cat(g, US" redis");
1060 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1061 g = string_cat(g, US" sqlite");
1063 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1064 g = string_cat(g, US" testdb");
1066 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1067 g = string_cat(g, US" whoson");
1069 g = string_cat(g, US"\n");
1071 g = auth_show_supported(g);
1072 g = route_show_supported(g);
1073 g = transport_show_supported(g);
1075 #ifdef WITH_CONTENT_SCAN
1076 g = malware_show_supported(g);
1079 if (fixed_never_users[0] > 0)
1082 g = string_cat(g, US"Fixed never_users: ");
1083 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1084 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1085 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1088 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1089 fputs(CS string_from_gstring(g), fp);
1091 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1093 /* Everything else is details which are only worth reporting when debugging.
1094 Perhaps the tls_version_report should move into this too. */
1097 /* clang defines __GNUC__ (at least, for me) so test for it first */
1098 #if defined(__clang__)
1099 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1100 #elif defined(__GNUC__)
1101 fprintf(fp, "Compiler: GCC [%s]\n",
1105 "? unknown version ?"
1109 fprintf(fp, "Compiler: <unknown>\n");
1112 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1113 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1114 __GLIBC__, __GLIBC_MINOR__);
1115 if (__GLIBC_PREREQ(2, 1))
1116 fprintf(fp, " Runtime: %s\n",
1117 gnu_get_libc_version());
1120 show_db_version(fp);
1123 tls_version_report(fp);
1126 utf8_version_report(fp);
1129 spf_lib_version_report(fp);
1132 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1133 if (authi->version_report)
1134 (*authi->version_report)(fp);
1136 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1137 characters; unless it's an ancient version of PCRE in which case it
1139 #ifndef PCRE_PRERELEASE
1140 # define PCRE_PRERELEASE
1143 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1144 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1146 PCRE_MAJOR, PCRE_MINOR,
1147 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1150 #undef EXPAND_AND_QUOTE
1153 for (int i = 0; i < lookup_list_count; i++)
1154 if (lookup_list[i]->version_report)
1155 lookup_list[i]->version_report(fp);
1157 #ifdef WHITELIST_D_MACROS
1158 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1160 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1162 #ifdef TRUSTED_CONFIG_LIST
1163 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1165 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1169 store_reset(reset_point);
1173 /*************************************************
1174 * Show auxiliary information about Exim *
1175 *************************************************/
1178 show_exim_information(enum commandline_info request, FILE *stream)
1183 fprintf(stream, "Oops, something went wrong.\n");
1187 "The -bI: flag takes a string indicating which information to provide.\n"
1188 "If the string is not recognised, you'll get this help (on stderr).\n"
1190 " exim -bI:help this information\n"
1191 " exim -bI:dscp list of known dscp value keywords\n"
1192 " exim -bI:sieve list of supported sieve extensions\n"
1196 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1197 fprintf(stream, "%s\n", *pp);
1200 dscp_list_to_stream(stream);
1206 /*************************************************
1207 * Quote a local part *
1208 *************************************************/
1210 /* This function is used when a sender address or a From: or Sender: header
1211 line is being created from the caller's login, or from an authenticated_id. It
1212 applies appropriate quoting rules for a local part.
1214 Argument: the local part
1215 Returns: the local part, quoted if necessary
1219 local_part_quote(uschar *lpart)
1221 BOOL needs_quote = FALSE;
1224 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1226 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1227 (*t != '.' || t == lpart || t[1] == 0);
1230 if (!needs_quote) return lpart;
1232 g = string_catn(NULL, US"\"", 1);
1236 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1239 g = string_cat(g, lpart);
1242 g = string_catn(g, lpart, nq - lpart);
1243 g = string_catn(g, US"\\", 1);
1244 g = string_catn(g, nq, 1);
1248 g = string_catn(g, US"\"", 1);
1249 return string_from_gstring(g);
1255 /*************************************************
1256 * Load readline() functions *
1257 *************************************************/
1259 /* This function is called from testing executions that read data from stdin,
1260 but only when running as the calling user. Currently, only -be does this. The
1261 function loads the readline() function library and passes back the functions.
1262 On some systems, it needs the curses library, so load that too, but try without
1263 it if loading fails. All this functionality has to be requested at build time.
1266 fn_readline_ptr pointer to where to put the readline pointer
1267 fn_addhist_ptr pointer to where to put the addhistory function
1269 Returns: the dlopen handle or NULL on failure
1273 set_readline(char * (**fn_readline_ptr)(const char *),
1274 void (**fn_addhist_ptr)(const char *))
1277 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1279 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1280 if (dlhandle_curses) dlclose(dlhandle_curses);
1284 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1285 * char * readline (const char *prompt);
1286 * void add_history (const char *string);
1288 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1289 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1292 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1300 /*************************************************
1301 * Get a line from stdin for testing things *
1302 *************************************************/
1304 /* This function is called when running tests that can take a number of lines
1305 of input (for example, -be and -bt). It handles continuations and trailing
1306 spaces. And prompting and a blank line output on eof. If readline() is in use,
1307 the arguments are non-NULL and provide the relevant functions.
1310 fn_readline readline function or NULL
1311 fn_addhist addhist function or NULL
1313 Returns: pointer to dynamic memory, or NULL at end of file
1317 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1321 if (!fn_readline) { printf("> "); fflush(stdout); }
1323 for (int i = 0;; i++)
1325 uschar buffer[1024];
1329 char *readline_line = NULL;
1332 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1333 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1334 p = US readline_line;
1339 /* readline() not in use */
1342 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1346 /* Handle the line */
1348 ss = p + (int)Ustrlen(p);
1349 while (ss > p && isspace(ss[-1])) ss--;
1352 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1354 g = string_catn(g, p, ss - p);
1357 if (fn_readline) free(readline_line);
1360 /* g can only be NULL if ss==p */
1361 if (ss == p || g->s[g->ptr-1] != '\\')
1365 (void) string_from_gstring(g);
1368 if (!g) printf("\n");
1369 return string_from_gstring(g);
1374 /*************************************************
1375 * Output usage information for the program *
1376 *************************************************/
1378 /* This function is called when there are no recipients
1379 or a specific --help argument was added.
1382 progname information on what name we were called by
1384 Returns: DOES NOT RETURN
1388 exim_usage(uschar *progname)
1391 /* Handle specific program invocation variants */
1392 if (Ustrcmp(progname, US"-mailq") == 0)
1394 "mailq - list the contents of the mail queue\n\n"
1395 "For a list of options, see the Exim documentation.\n");
1397 /* Generic usage - we output this whatever happens */
1399 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1400 "not directly from a shell command line. Options and/or arguments control\n"
1401 "what it does when called. For a list of options, see the Exim documentation.\n");
1406 /*************************************************
1407 * Validate that the macros given are okay *
1408 *************************************************/
1410 /* Typically, Exim will drop privileges if macros are supplied. In some
1411 cases, we want to not do so.
1413 Arguments: opt_D_used - true if the commandline had a "-D" option
1414 Returns: true if trusted, false otherwise
1418 macros_trusted(BOOL opt_D_used)
1420 #ifdef WHITELIST_D_MACROS
1421 uschar *whitelisted, *end, *p, **whites;
1422 int white_count, i, n;
1424 BOOL prev_char_item, found;
1429 #ifndef WHITELIST_D_MACROS
1433 /* We only trust -D overrides for some invoking users:
1434 root, the exim run-time user, the optional config owner user.
1435 I don't know why config-owner would be needed, but since they can own the
1436 config files anyway, there's no security risk to letting them override -D. */
1437 if ( ! ((real_uid == root_uid)
1438 || (real_uid == exim_uid)
1439 #ifdef CONFIGURE_OWNER
1440 || (real_uid == config_uid)
1444 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1448 /* Get a list of macros which are whitelisted */
1449 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1450 prev_char_item = FALSE;
1452 for (p = whitelisted; *p != '\0'; ++p)
1454 if (*p == ':' || isspace(*p))
1459 prev_char_item = FALSE;
1462 if (!prev_char_item)
1463 prev_char_item = TRUE;
1470 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1471 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1476 if (i == white_count)
1478 while (*p != '\0' && p < end)
1484 /* The list of commandline macros should be very short.
1485 Accept the N*M complexity. */
1486 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1489 for (uschar ** w = whites; *w; ++w)
1490 if (Ustrcmp(*w, m->name) == 0)
1497 if (!m->replacement)
1499 if ((len = m->replen) == 0)
1501 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1502 0, PCRE_EOPT, NULL, 0);
1505 if (n != PCRE_ERROR_NOMATCH)
1506 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1510 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1516 /*************************************************
1517 * Expansion testing *
1518 *************************************************/
1520 /* Expand and print one item, doing macro-processing.
1523 item line for expansion
1527 expansion_test_line(uschar * line)
1532 Ustrncpy(big_buffer, line, big_buffer_size);
1533 big_buffer[big_buffer_size-1] = '\0';
1534 len = Ustrlen(big_buffer);
1536 (void) macros_expand(0, &len, &dummy_macexp);
1538 if (isupper(big_buffer[0]))
1540 if (macro_read_assignment(big_buffer))
1541 printf("Defined macro '%s'\n", mlast->name);
1544 if ((line = expand_string(big_buffer))) printf("%s\n", CS line);
1545 else printf("Failed: %s\n", expand_string_message);
1550 /*************************************************
1551 * Entry point and high-level code *
1552 *************************************************/
1554 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1555 the appropriate action. All the necessary functions are present in the one
1556 binary. I originally thought one should split it up, but it turns out that so
1557 much of the apparatus is needed in each chunk that one might as well just have
1558 it all available all the time, which then makes the coding easier as well.
1561 argc count of entries in argv
1562 argv argument strings, with argv[0] being the program name
1564 Returns: EXIT_SUCCESS if terminated successfully
1565 EXIT_FAILURE otherwise, except when a message has been sent
1566 to the sender, and -oee was given
1570 main(int argc, char **cargv)
1572 uschar **argv = USS cargv;
1573 int arg_receive_timeout = -1;
1574 int arg_smtp_receive_timeout = -1;
1575 int arg_error_handling = error_handling;
1576 int filter_sfd = -1;
1577 int filter_ufd = -1;
1580 int list_queue_option = 0;
1582 int msg_action_arg = -1;
1583 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1584 int queue_only_reason = 0;
1586 int perl_start_option = 0;
1588 int recipients_arg = argc;
1589 int sender_address_domain = 0;
1590 int test_retry_arg = -1;
1591 int test_rewrite_arg = -1;
1592 gid_t original_egid;
1593 BOOL arg_queue_only = FALSE;
1594 BOOL bi_option = FALSE;
1595 BOOL checking = FALSE;
1596 BOOL count_queue = FALSE;
1597 BOOL expansion_test = FALSE;
1598 BOOL extract_recipients = FALSE;
1599 BOOL flag_G = FALSE;
1600 BOOL flag_n = FALSE;
1601 BOOL forced_delivery = FALSE;
1602 BOOL f_end_dot = FALSE;
1603 BOOL deliver_give_up = FALSE;
1604 BOOL list_queue = FALSE;
1605 BOOL list_options = FALSE;
1606 BOOL list_config = FALSE;
1607 BOOL local_queue_only;
1609 BOOL one_msg_action = FALSE;
1610 BOOL opt_D_used = FALSE;
1611 BOOL queue_only_set = FALSE;
1612 BOOL receiving_message = TRUE;
1613 BOOL sender_ident_set = FALSE;
1614 BOOL session_local_queue_only;
1616 BOOL removed_privilege = FALSE;
1617 BOOL usage_wanted = FALSE;
1618 BOOL verify_address_mode = FALSE;
1619 BOOL verify_as_sender = FALSE;
1620 BOOL rcpt_verify_quota = FALSE;
1621 BOOL version_printed = FALSE;
1622 uschar *alias_arg = NULL;
1623 uschar *called_as = US"";
1624 uschar *cmdline_syslog_name = NULL;
1625 uschar *start_queue_run_id = NULL;
1626 uschar *stop_queue_run_id = NULL;
1627 uschar *expansion_test_message = NULL;
1628 uschar *ftest_domain = NULL;
1629 uschar *ftest_localpart = NULL;
1630 uschar *ftest_prefix = NULL;
1631 uschar *ftest_suffix = NULL;
1632 uschar *log_oneline = NULL;
1633 uschar *malware_test_file = NULL;
1634 uschar *real_sender_address;
1635 uschar *originator_home = US"/";
1639 struct stat statbuf;
1640 pid_t passed_qr_pid = (pid_t)0;
1641 int passed_qr_pipe = -1;
1642 gid_t group_list[EXIM_GROUPLIST_SIZE];
1644 /* For the -bI: flag */
1645 enum commandline_info info_flag = CMDINFO_NONE;
1646 BOOL info_stdout = FALSE;
1648 /* Possible options for -R and -S */
1650 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1652 /* Need to define this in case we need to change the environment in order
1653 to get rid of a bogus time zone. We have to make it char rather than uschar
1654 because some OS define it in /usr/include/unistd.h. */
1656 extern char **environ;
1658 #ifdef MEASURE_TIMING
1659 (void)gettimeofday(×tamp_startup, NULL);
1662 /* If the Exim user and/or group and/or the configuration file owner/group were
1663 defined by ref:name at build time, we must now find the actual uid/gid values.
1664 This is a feature to make the lives of binary distributors easier. */
1666 #ifdef EXIM_USERNAME
1667 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1670 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1672 /* If ref:name uses a number as the name, route_finduser() returns
1673 TRUE with exim_uid set and pw coerced to NULL. */
1675 exim_gid = pw->pw_gid;
1676 #ifndef EXIM_GROUPNAME
1679 "exim: ref:name should specify a usercode, not a group.\n"
1680 "exim: can't let you get away with it unless you also specify a group.\n");
1684 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1687 #ifdef EXIM_GROUPNAME
1688 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1689 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1692 #ifdef CONFIGURE_OWNERNAME
1693 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1694 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1695 CONFIGURE_OWNERNAME);
1698 /* We default the system_filter_user to be the Exim run-time user, as a
1699 sane non-root value. */
1700 system_filter_uid = exim_uid;
1702 #ifdef CONFIGURE_GROUPNAME
1703 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1704 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1705 CONFIGURE_GROUPNAME);
1708 /* In the Cygwin environment, some initialization used to need doing.
1709 It was fudged in by means of this macro; now no longer but we'll leave
1710 it in case of others. */
1716 /* Check a field which is patched when we are running Exim within its
1717 testing harness; do a fast initial check, and then the whole thing. */
1719 f.running_in_test_harness =
1720 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1721 if (f.running_in_test_harness)
1724 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1725 at the start of a program; however, it seems that some environments do not
1726 follow this. A "strange" locale can affect the formatting of timestamps, so we
1729 setlocale(LC_ALL, "C");
1731 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1733 #ifdef _POSIX_MONOTONIC_CLOCK
1737 /* Set up the default handler for timing using alarm(). */
1739 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1741 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1742 because store_malloc writes a log entry on failure. */
1744 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1745 exim_fail("exim: failed to get store for log buffer\n");
1747 /* Initialize the default log options. */
1749 bits_set(log_selector, log_selector_size, log_default);
1751 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1752 NULL when the daemon is run and the file is closed. We have to use this
1753 indirection, because some systems don't allow writing to the variable "stderr".
1756 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1758 /* Arrange for the PCRE regex library to use our store functions. Note that
1759 the normal calls are actually macros that add additional arguments for
1760 debugging purposes so we have to assign specially constructed functions here.
1761 The default is to use store in the stacking pool, but this is overridden in the
1762 regex_must_compile() function. */
1764 pcre_malloc = function_store_get;
1765 pcre_free = function_dummy_free;
1767 /* Ensure there is a big buffer for temporary use in several places. It is put
1768 in malloc store so that it can be freed for enlargement if necessary. */
1770 big_buffer = store_malloc(big_buffer_size);
1772 /* Set up the handler for the data request signal, and set the initial
1773 descriptive text. */
1775 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1776 set_process_info("initializing");
1777 os_restarting_signal(SIGUSR1, usr1_handler);
1779 /* If running in a dockerized environment, the TERM signal is only
1780 delegated to the PID 1 if we request it by setting an signal handler */
1781 if (getpid() == 1) signal(SIGTERM, term_handler);
1783 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1784 in the daemon code. For the rest of Exim's uses, we ignore it. */
1786 signal(SIGHUP, SIG_IGN);
1788 /* We don't want to die on pipe errors as the code is written to handle
1789 the write error instead. */
1791 signal(SIGPIPE, SIG_IGN);
1793 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1794 set to SIG_IGN. This causes subprocesses that complete before the parent
1795 process waits for them not to hang around, so when Exim calls wait(), nothing
1796 is there. The wait() code has been made robust against this, but let's ensure
1797 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1798 ending status. We use sigaction rather than plain signal() on those OS where
1799 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1800 problem on AIX with this.) */
1804 struct sigaction act;
1805 act.sa_handler = SIG_DFL;
1806 sigemptyset(&(act.sa_mask));
1808 sigaction(SIGCHLD, &act, NULL);
1811 signal(SIGCHLD, SIG_DFL);
1814 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1819 /* Set up the version number. Set up the leading 'E' for the external form of
1820 message ids, set the pointer to the internal form, and initialize it to
1821 indicate no message being processed. */
1824 message_id_option[0] = '-';
1825 message_id_external = message_id_option + 1;
1826 message_id_external[0] = 'E';
1827 message_id = message_id_external + 1;
1830 /* Set the umask to zero so that any files Exim creates using open() are
1831 created with the modes that it specifies. NOTE: Files created with fopen() have
1832 a problem, which was not recognized till rather late (February 2006). With this
1833 umask, such files will be world writeable. (They are all content scanning files
1834 in the spool directory, which isn't world-accessible, so this is not a
1835 disaster, but it's untidy.) I don't want to change this overall setting,
1836 however, because it will interact badly with the open() calls. Instead, there's
1837 now a function called modefopen() that fiddles with the umask while calling
1842 /* Precompile the regular expression for matching a message id. Keep this in
1843 step with the code that generates ids in the accept.c module. We need to do
1844 this here, because the -M options check their arguments for syntactic validity
1845 using mac_ismsgid, which uses this. */
1848 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1850 /* Precompile the regular expression that is used for matching an SMTP error
1851 code, possibly extended, at the start of an error message. Note that the
1852 terminating whitespace character is included. */
1855 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1858 #ifdef WHITELIST_D_MACROS
1859 /* Precompile the regular expression used to filter the content of macros
1860 given to -D for permissibility. */
1862 regex_whitelisted_macro =
1863 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1866 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1868 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1869 this seems to be a generally accepted convention, since one finds symbolic
1870 links called "mailq" in standard OS configurations. */
1872 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1873 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1876 receiving_message = FALSE;
1877 called_as = US"-mailq";
1880 /* If the program is called as "rmail" treat it as equivalent to
1881 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1882 i.e. preventing a single dot on a line from terminating the message, and
1883 returning with zero return code, even in cases of error (provided an error
1884 message has been sent). */
1886 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1887 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1890 called_as = US"-rmail";
1891 errors_sender_rc = EXIT_SUCCESS;
1894 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1895 this is a smail convention. */
1897 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1898 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1900 smtp_input = smtp_batched_input = TRUE;
1901 called_as = US"-rsmtp";
1904 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1905 this is a smail convention. */
1907 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1908 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1911 receiving_message = FALSE;
1912 called_as = US"-runq";
1915 /* If the program is called as "newaliases" treat it as equivalent to
1916 "exim -bi"; this is a sendmail convention. */
1918 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1919 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1922 receiving_message = FALSE;
1923 called_as = US"-newaliases";
1926 /* Save the original effective uid for a couple of uses later. It should
1927 normally be root, but in some esoteric environments it may not be. */
1929 original_euid = geteuid();
1930 original_egid = getegid();
1932 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1933 to be the same as the real ones. This makes a difference only if Exim is setuid
1934 (or setgid) to something other than root, which could be the case in some
1935 special configurations. */
1937 real_uid = getuid();
1938 real_gid = getgid();
1940 if (real_uid == root_uid)
1942 if ((rv = setgid(real_gid)))
1943 exim_fail("exim: setgid(%ld) failed: %s\n",
1944 (long int)real_gid, strerror(errno));
1945 if ((rv = setuid(real_uid)))
1946 exim_fail("exim: setuid(%ld) failed: %s\n",
1947 (long int)real_uid, strerror(errno));
1950 /* If neither the original real uid nor the original euid was root, Exim is
1951 running in an unprivileged state. */
1953 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1955 /* For most of the args-parsing we need to use permanent pool memory */
1957 int old_pool = store_pool;
1958 store_pool = POOL_PERM;
1960 /* Scan the program's arguments. Some can be dealt with right away; others are
1961 simply recorded for checking and handling afterwards. Do a high-level switch
1962 on the second character (the one after '-'), to save some effort. */
1964 for (i = 1; i < argc; i++)
1966 BOOL badarg = FALSE;
1967 uschar * arg = argv[i];
1971 /* An argument not starting with '-' is the start of a recipients list;
1972 break out of the options-scanning loop. */
1980 /* An option consisting of -- terminates the options */
1982 if (Ustrcmp(arg, "--") == 0)
1984 recipients_arg = i + 1;
1988 /* Handle flagged options */
1990 switchchar = arg[1];
1993 /* Make all -ex options synonymous with -oex arguments, since that
1994 is assumed by various callers. Also make -qR options synonymous with -R
1995 options, as that seems to be required as well. Allow for -qqR too, and
1996 the same for -S options. */
1998 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1999 Ustrncmp(arg+1, "qR", 2) == 0 ||
2000 Ustrncmp(arg+1, "qS", 2) == 0)
2002 switchchar = arg[2];
2005 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2007 switchchar = arg[3];
2009 f.queue_2stage = TRUE;
2012 /* Make -r synonymous with -f, since it is a documented alias */
2014 else if (arg[1] == 'r') switchchar = 'f';
2016 /* Make -ov synonymous with -v */
2018 else if (Ustrcmp(arg, "-ov") == 0)
2024 /* deal with --option_aliases */
2025 else if (switchchar == '-')
2027 if (Ustrcmp(argrest, "help") == 0)
2029 usage_wanted = TRUE;
2032 else if (Ustrcmp(argrest, "version") == 0)
2039 /* High-level switch on active initial letter */
2044 /* sendmail uses -Ac and -Am to control which .cf file is used;
2047 if (!*argrest) { badarg = TRUE; break; }
2050 BOOL ignore = FALSE;
2055 if (*(argrest + 1) == '\0')
2059 if (!ignore) badarg = TRUE;
2063 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2064 so has no need of it. */
2067 if (!*argrest) i++; /* Skip over the type */
2073 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2077 /* -bd: Run in daemon mode, awaiting SMTP connections.
2078 -bdf: Ditto, but in the foreground.
2081 f.daemon_listen = TRUE;
2082 if (*argrest == 'f') f.background_daemon = FALSE;
2083 else if (*argrest) badarg = TRUE;
2086 /* -be: Run in expansion test mode
2087 -bem: Ditto, but read a message from a file first
2090 expansion_test = checking = TRUE;
2091 if (*argrest == 'm')
2093 if (++i >= argc) { badarg = TRUE; break; }
2094 expansion_test_message = argv[i];
2097 if (*argrest) badarg = TRUE;
2100 /* -bF: Run system filter test */
2102 filter_test |= checking = FTEST_SYSTEM;
2103 if (*argrest) badarg = TRUE;
2104 else if (++i < argc) filter_test_sfile = argv[i];
2105 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2108 /* -bf: Run user filter test
2109 -bfd: Set domain for filter testing
2110 -bfl: Set local part for filter testing
2111 -bfp: Set prefix for filter testing
2112 -bfs: Set suffix for filter testing
2117 filter_test |= checking = FTEST_USER;
2118 if (++i < argc) filter_test_ufile = argv[i];
2119 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2124 exim_fail("exim: string expected after %s\n", arg);
2125 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2126 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2127 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2128 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2133 /* -bh: Host checking - an IP address must follow. */
2135 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2137 if (++i >= argc) { badarg = TRUE; break; }
2138 sender_host_address = string_copy_taint(argv[i], TRUE);
2139 host_checking = checking = f.log_testing_mode = TRUE;
2140 f.host_checking_callout = *argrest == 'c';
2141 message_logs = FALSE;
2146 /* -bi: This option is used by sendmail to initialize *the* alias file,
2147 though it has the -oA option to specify a different file. Exim has no
2148 concept of *the* alias file, but since Sun's YP make script calls
2149 sendmail this way, some support must be provided. */
2151 if (!*argrest) bi_option = TRUE;
2155 /* -bI: provide information, of the type to follow after a colon.
2156 This is an Exim flag. */
2158 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2160 uschar *p = argrest+1;
2161 info_flag = CMDINFO_HELP;
2163 if (strcmpic(p, CUS"sieve") == 0)
2165 info_flag = CMDINFO_SIEVE;
2168 else if (strcmpic(p, CUS"dscp") == 0)
2170 info_flag = CMDINFO_DSCP;
2173 else if (strcmpic(p, CUS"help") == 0)
2179 /* -bm: Accept and deliver message - the default option. Reinstate
2180 receiving_message, which got turned off for all -b options.
2181 -bmalware: test the filename given for malware */
2183 if (!*argrest) receiving_message = TRUE;
2184 else if (Ustrcmp(argrest, "alware") == 0)
2186 if (++i >= argc) { badarg = TRUE; break; }
2188 malware_test_file = argv[i];
2193 /* -bnq: For locally originating messages, do not qualify unqualified
2194 addresses. In the envelope, this causes errors; in header lines they
2197 if (Ustrcmp(argrest, "q") == 0)
2199 f.allow_unqualified_sender = FALSE;
2200 f.allow_unqualified_recipient = FALSE;
2205 /* -bpxx: List the contents of the mail queue, in various forms. If
2206 the option is -bpc, just a queue count is needed. Otherwise, if the
2207 first letter after p is r, then order is random. */
2209 if (*argrest == 'c')
2212 if (*++argrest) badarg = TRUE;
2216 if (*argrest == 'r')
2218 list_queue_option = 8;
2221 else list_queue_option = 0;
2225 /* -bp: List the contents of the mail queue, top-level only */
2229 /* -bpu: List the contents of the mail queue, top-level undelivered */
2231 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2233 /* -bpa: List the contents of the mail queue, including all delivered */
2235 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2237 /* Unknown after -bp[r] */
2243 /* -bP: List the configuration variables given as the address list.
2244 Force -v, so configuration errors get displayed. */
2247 /* -bP config: we need to setup here, because later,
2248 * when list_options is checked, the config is read already */
2251 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2254 readconf_save_config(version_string);
2258 list_options = TRUE;
2259 debug_selector |= D_v;
2260 debug_file = stderr;
2264 /* -brt: Test retry configuration lookup */
2266 if (Ustrcmp(argrest, "t") == 0)
2269 test_retry_arg = i + 1;
2273 /* -brw: Test rewrite configuration */
2275 else if (Ustrcmp(argrest, "w") == 0)
2278 test_rewrite_arg = i + 1;
2284 /* -bS: Read SMTP commands on standard input, but produce no replies -
2285 all errors are reported by sending messages. */
2288 smtp_input = smtp_batched_input = receiving_message = TRUE;
2292 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2293 on standard output. */
2295 if (!*argrest) smtp_input = receiving_message = TRUE;
2299 /* -bt: address testing mode */
2302 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2306 /* -bv: verify addresses */
2309 verify_address_mode = checking = f.log_testing_mode = TRUE;
2311 /* -bvs: verify sender addresses */
2313 else if (Ustrcmp(argrest, "s") == 0)
2315 verify_address_mode = checking = f.log_testing_mode = TRUE;
2316 verify_as_sender = TRUE;
2321 /* -bV: Print version string and support details */
2325 printf("Exim version %s #%s built %s\n", version_string,
2326 version_cnumber, version_date);
2327 printf("%s\n", CS version_copyright);
2328 version_printed = TRUE;
2329 show_whats_supported(stdout);
2330 f.log_testing_mode = TRUE;
2335 /* -bw: inetd wait mode, accept a listening socket as stdin */
2337 f.inetd_wait_mode = TRUE;
2338 f.background_daemon = FALSE;
2339 f.daemon_listen = TRUE;
2341 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2342 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2353 /* -C: change configuration file list; ignore if it isn't really
2354 a change! Enforce a prefix check if required. */
2358 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2359 if (Ustrcmp(config_main_filelist, argrest) != 0)
2361 #ifdef ALT_CONFIG_PREFIX
2363 int len = Ustrlen(ALT_CONFIG_PREFIX);
2364 const uschar *list = argrest;
2366 while((filename = string_nextinlist(&list, &sep, big_buffer,
2368 if ( ( Ustrlen(filename) < len
2369 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2370 || Ustrstr(filename, "/../") != NULL
2372 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2374 exim_fail("-C Permission denied\n");
2376 if (real_uid != root_uid)
2378 #ifdef TRUSTED_CONFIG_LIST
2380 if (real_uid != exim_uid
2381 #ifdef CONFIGURE_OWNER
2382 && real_uid != config_uid
2385 f.trusted_config = FALSE;
2388 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2391 struct stat statbuf;
2393 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2394 (statbuf.st_uid != root_uid /* owner not root */
2395 #ifdef CONFIGURE_OWNER
2396 && statbuf.st_uid != config_uid /* owner not the special one */
2399 (statbuf.st_gid != root_gid /* group not root */
2400 #ifdef CONFIGURE_GROUP
2401 && statbuf.st_gid != config_gid /* group not the special one */
2403 && (statbuf.st_mode & 020) != 0 /* group writeable */
2405 (statbuf.st_mode & 2) != 0) /* world writeable */
2407 f.trusted_config = FALSE;
2412 /* Well, the trust list at least is up to scratch... */
2414 uschar *trusted_configs[32];
2417 int old_pool = store_pool;
2418 store_pool = POOL_MAIN;
2420 reset_point = store_mark();
2421 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2423 uschar *start = big_buffer, *nl;
2424 while (*start && isspace(*start))
2428 nl = Ustrchr(start, '\n');
2431 trusted_configs[nr_configs++] = string_copy(start);
2432 if (nr_configs == nelem(trusted_configs))
2440 const uschar *list = argrest;
2442 while (f.trusted_config && (filename = string_nextinlist(&list,
2443 &sep, big_buffer, big_buffer_size)))
2445 for (i=0; i < nr_configs; i++)
2446 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2448 if (i == nr_configs)
2450 f.trusted_config = FALSE;
2455 else /* No valid prefixes found in trust_list file. */
2456 f.trusted_config = FALSE;
2457 store_reset(reset_point);
2458 store_pool = old_pool;
2461 else /* Could not open trust_list file. */
2462 f.trusted_config = FALSE;
2465 /* Not root; don't trust config */
2466 f.trusted_config = FALSE;
2470 config_main_filelist = argrest;
2471 f.config_changed = TRUE;
2476 /* -D: set up a macro definition */
2479 #ifdef DISABLE_D_OPTION
2480 exim_fail("exim: -D is not available in this Exim binary\n");
2486 uschar *s = argrest;
2489 while (isspace(*s)) s++;
2491 if (*s < 'A' || *s > 'Z')
2492 exim_fail("exim: macro name set by -D must start with "
2493 "an upper case letter\n");
2495 while (isalnum(*s) || *s == '_')
2497 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2501 if (ptr == 0) { badarg = TRUE; break; }
2502 while (isspace(*s)) s++;
2505 if (*s++ != '=') { badarg = TRUE; break; }
2506 while (isspace(*s)) s++;
2509 for (m = macros_user; m; m = m->next)
2510 if (Ustrcmp(m->name, name) == 0)
2511 exim_fail("exim: duplicated -D in command line\n");
2513 m = macro_create(name, s, TRUE);
2515 if (clmacro_count >= MAX_CLMACROS)
2516 exim_fail("exim: too many -D options on command line\n");
2517 clmacros[clmacro_count++] =
2518 string_sprintf("-D%s=%s", m->name, m->replacement);
2523 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2524 The latter is now a no-op, retained for compatibility only. If -dd is used,
2525 debugging subprocesses of the daemon is disabled. */
2528 if (Ustrcmp(argrest, "ropcr") == 0)
2530 /* drop_cr = TRUE; */
2533 /* Use an intermediate variable so that we don't set debugging while
2534 decoding the debugging bits. */
2538 unsigned int selector = D_default;
2541 if (*argrest == 'd')
2543 f.debug_daemon = TRUE;
2547 decode_bits(&selector, 1, debug_notall, argrest,
2548 debug_options, debug_options_count, US"debug", 0);
2549 debug_selector = selector;
2554 /* -E: This is a local error message. This option is not intended for
2555 external use at all, but is not restricted to trusted callers because it
2556 does no harm (just suppresses certain error messages) and if Exim is run
2557 not setuid root it won't always be trusted when it generates error
2558 messages using this option. If there is a message id following -E, point
2559 message_reference at it, for logging. */
2562 f.local_error_message = TRUE;
2563 if (mac_ismsgid(argrest)) message_reference = argrest;
2567 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2568 option, so it looks as if historically the -oex options are also callable
2569 without the leading -o. So we have to accept them. Before the switch,
2570 anything starting -oe has been converted to -e. Exim does not support all
2571 of the sendmail error options. */
2574 if (Ustrcmp(argrest, "e") == 0)
2576 arg_error_handling = ERRORS_SENDER;
2577 errors_sender_rc = EXIT_SUCCESS;
2579 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2580 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2581 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2582 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2587 /* -F: Set sender's full name, used instead of the gecos entry from
2588 the password file. Since users can usually alter their gecos entries,
2589 there's no security involved in using this instead. The data can follow
2590 the -F or be in the next argument. */
2594 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2595 originator_name = string_copy_taint(argrest, TRUE);
2596 f.sender_name_forced = TRUE;
2600 /* -f: Set sender's address - this value is only actually used if Exim is
2601 run by a trusted user, or if untrusted_set_sender is set and matches the
2602 address, except that the null address can always be set by any user. The
2603 test for this happens later, when the value given here is ignored when not
2604 permitted. For an untrusted user, the actual sender is still put in Sender:
2605 if it doesn't match the From: header (unless no_local_from_check is set).
2606 The data can follow the -f or be in the next argument. The -r switch is an
2607 obsolete form of -f but since there appear to be programs out there that
2608 use anything that sendmail has ever supported, better accept it - the
2609 synonymizing is done before the switch above.
2611 At this stage, we must allow domain literal addresses, because we don't
2612 know what the setting of allow_domain_literals is yet. Ditto for trailing
2613 dots and strip_trailing_dot. */
2617 int dummy_start, dummy_end;
2620 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2622 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2625 uschar * temp = argrest + Ustrlen(argrest) - 1;
2626 while (temp >= argrest && isspace(*temp)) temp--;
2627 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2628 allow_domain_literals = TRUE;
2629 strip_trailing_dot = TRUE;
2631 allow_utf8_domains = TRUE;
2633 if (!(sender_address = parse_extract_address(argrest, &errmess,
2634 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2635 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2637 sender_address = string_copy_taint(sender_address, TRUE);
2639 message_smtputf8 = string_is_utf8(sender_address);
2640 allow_utf8_domains = FALSE;
2642 allow_domain_literals = FALSE;
2643 strip_trailing_dot = FALSE;
2645 f.sender_address_forced = TRUE;
2649 /* -G: sendmail invocation to specify that it's a gateway submission and
2650 sendmail may complain about problems instead of fixing them.
2651 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2652 not at this time complain about problems. */
2658 /* -h: Set the hop count for an incoming message. Exim does not currently
2659 support this; it always computes it by counting the Received: headers.
2660 To put it in will require a change to the spool header file format. */
2664 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2665 if (!isdigit(*argrest)) badarg = TRUE;
2669 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2670 not to be documented for sendmail but mailx (at least) uses it) */
2673 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2677 /* -L: set the identifier used for syslog; equivalent to setting
2678 syslog_processname in the config file, but needs to be an admin option. */
2682 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2683 if ((sz = Ustrlen(argrest)) > 32)
2684 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2686 exim_fail("exim: the -L syslog name is too short\n");
2687 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2691 receiving_message = FALSE;
2693 /* -MC: continue delivery of another message via an existing open
2694 file descriptor. This option is used for an internal call by the
2695 smtp transport when there is a pending message waiting to go to an
2696 address to which it has got a connection. Five subsequent arguments are
2697 required: transport name, host name, IP address, sequence number, and
2698 message_id. Transports may decline to create new processes if the sequence
2699 number gets too big. The channel is stdin. This (-MC) must be the last
2700 argument. There's a subsequent check that the real-uid is privileged.
2702 If we are running in the test harness. delay for a bit, to let the process
2703 that set this one up complete. This makes for repeatability of the logging,
2706 if (Ustrcmp(argrest, "C") == 0)
2708 union sockaddr_46 interface_sock;
2709 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2712 exim_fail("exim: too many or too few arguments after -MC\n");
2714 if (msg_action_arg >= 0)
2715 exim_fail("exim: incompatible arguments\n");
2717 continue_transport = string_copy_taint(argv[++i], TRUE);
2718 continue_hostname = string_copy_taint(argv[++i], TRUE);
2719 continue_host_address = string_copy_taint(argv[++i], TRUE);
2720 continue_sequence = Uatoi(argv[++i]);
2721 msg_action = MSG_DELIVER;
2722 msg_action_arg = ++i;
2723 forced_delivery = TRUE;
2724 queue_run_pid = passed_qr_pid;
2725 queue_run_pipe = passed_qr_pipe;
2727 if (!mac_ismsgid(argv[i]))
2728 exim_fail("exim: malformed message id %s after -MC option\n",
2731 /* Set up $sending_ip_address and $sending_port, unless proxied */
2733 if (!continue_proxy_cipher)
2734 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2736 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2739 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2742 testharness_pause_ms(500);
2746 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2750 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2751 precedes -MC (see above). The flag indicates that the host to which
2752 Exim is connected has accepted an AUTH sequence. */
2754 case 'A': f.smtp_authenticated = TRUE; break;
2756 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2757 that exim is connected to supports the esmtp extension DSN */
2759 case 'D': smtp_peer_options |= OPTION_DSN; break;
2761 /* -MCd: for debug, set a process-purpose string */
2763 case 'd': if (++i < argc)
2764 process_purpose = string_copy_taint(argv[i], TRUE);
2768 /* -MCG: set the queue name, to a non-default value */
2770 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2774 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2776 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2778 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2779 it preceded -MC (see above) */
2781 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2783 /* -MCQ: pass on the pid of the queue-running process that started
2784 this chain of deliveries and the fd of its synchronizing pipe; this
2785 is useful only when it precedes -MC (see above) */
2787 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2789 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2793 /* -MCq: do a quota check on the given recipient for the given size
2794 of message. Separate from -MC. */
2795 case 'q': rcpt_verify_quota = TRUE;
2796 if (++i < argc) message_size = Uatoi(argv[i]);
2800 /* -MCS: set the smtp_use_size flag; this is useful only when it
2801 precedes -MC (see above) */
2803 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2806 /* -MCt: similar to -MCT below but the connection is still open
2807 via a proxy process which handles the TLS context and coding.
2808 Require three arguments for the proxied local address and port,
2809 and the TLS cipher. */
2811 case 't': if (++i < argc)
2812 sending_ip_address = string_copy_taint(argv[i], TRUE);
2815 sending_port = (int)(Uatol(argv[i]));
2818 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2822 /* -MCT: set the tls_offered flag; this is useful only when it
2823 precedes -MC (see above). The flag indicates that the host to which
2824 Exim is connected has offered TLS support. */
2826 case 'T': smtp_peer_options |= OPTION_TLS; break;
2829 default: badarg = TRUE; break;
2834 /* -M[x]: various operations on the following list of message ids:
2835 -M deliver the messages, ignoring next retry times and thawing
2836 -Mc deliver the messages, checking next retry times, no thawing
2837 -Mf freeze the messages
2838 -Mg give up on the messages
2839 -Mt thaw the messages
2840 -Mrm remove the messages
2841 In the above cases, this must be the last option. There are also the
2842 following options which are followed by a single message id, and which
2843 act on that message. Some of them use the "recipient" addresses as well.
2844 -Mar add recipient(s)
2845 -Mmad mark all recipients delivered
2846 -Mmd mark recipients(s) delivered
2848 -Mset load a message for use with -be
2850 -Mvc show copy (of whole message, in RFC 2822 format)
2857 msg_action = MSG_DELIVER;
2858 forced_delivery = f.deliver_force_thaw = TRUE;
2860 else if (Ustrcmp(argrest, "ar") == 0)
2862 msg_action = MSG_ADD_RECIPIENT;
2863 one_msg_action = TRUE;
2865 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2866 else if (Ustrcmp(argrest, "es") == 0)
2868 msg_action = MSG_EDIT_SENDER;
2869 one_msg_action = TRUE;
2871 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2872 else if (Ustrcmp(argrest, "g") == 0)
2874 msg_action = MSG_DELIVER;
2875 deliver_give_up = TRUE;
2877 else if (Ustrcmp(argrest, "G") == 0)
2879 msg_action = MSG_SETQUEUE;
2880 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2882 else if (Ustrcmp(argrest, "mad") == 0)
2884 msg_action = MSG_MARK_ALL_DELIVERED;
2886 else if (Ustrcmp(argrest, "md") == 0)
2888 msg_action = MSG_MARK_DELIVERED;
2889 one_msg_action = TRUE;
2891 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2892 else if (Ustrcmp(argrest, "set") == 0)
2894 msg_action = MSG_LOAD;
2895 one_msg_action = TRUE;
2897 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2898 else if (Ustrcmp(argrest, "vb") == 0)
2900 msg_action = MSG_SHOW_BODY;
2901 one_msg_action = TRUE;
2903 else if (Ustrcmp(argrest, "vc") == 0)
2905 msg_action = MSG_SHOW_COPY;
2906 one_msg_action = TRUE;
2908 else if (Ustrcmp(argrest, "vh") == 0)
2910 msg_action = MSG_SHOW_HEADER;
2911 one_msg_action = TRUE;
2913 else if (Ustrcmp(argrest, "vl") == 0)
2915 msg_action = MSG_SHOW_LOG;
2916 one_msg_action = TRUE;
2918 else { badarg = TRUE; break; }
2920 /* All the -Mxx options require at least one message id. */
2922 msg_action_arg = i + 1;
2923 if (msg_action_arg >= argc)
2924 exim_fail("exim: no message ids given after %s option\n", arg);
2926 /* Some require only message ids to follow */
2928 if (!one_msg_action)
2930 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2931 exim_fail("exim: malformed message id %s after %s option\n",
2933 goto END_ARG; /* Remaining args are ids */
2936 /* Others require only one message id, possibly followed by addresses,
2937 which will be handled as normal arguments. */
2941 if (!mac_ismsgid(argv[msg_action_arg]))
2942 exim_fail("exim: malformed message id %s after %s option\n",
2943 argv[msg_action_arg], arg);
2949 /* Some programs seem to call the -om option without the leading o;
2950 for sendmail it askes for "me too". Exim always does this. */
2953 if (*argrest) badarg = TRUE;
2957 /* -N: don't do delivery - a debugging option that stops transports doing
2958 their thing. It implies debugging at the D_v level. */
2963 f.dont_deliver = TRUE;
2964 debug_selector |= D_v;
2965 debug_file = stderr;
2971 /* -n: This means "don't alias" in sendmail, apparently.
2972 For normal invocations, it has no effect.
2973 It may affect some other options. */
2979 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2980 option to the specified value. This form uses long names. We need to handle
2981 -O option=value and -Ooption=value. */
2986 exim_fail("exim: string expected after -O\n");
2992 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2995 if (!*(alias_arg = argrest))
2996 if (i+1 < argc) alias_arg = argv[++i];
2997 else exim_fail("exim: string expected after -oA\n");
3000 /* -oB: Set a connection message max value for remote deliveries */
3003 uschar * p = argrest;
3005 if (i+1 < argc && isdigit((argv[i+1][0])))
3009 connection_max_messages = 1;
3016 exim_fail("exim: number expected after -oB\n");
3017 connection_max_messages = Uatoi(p);
3022 /* -odb: background delivery */
3025 if (Ustrcmp(argrest, "b") == 0)
3027 f.synchronous_delivery = FALSE;
3028 arg_queue_only = FALSE;
3029 queue_only_set = TRUE;
3032 /* -odd: testsuite-only: add no inter-process delays */
3034 else if (Ustrcmp(argrest, "d") == 0)
3035 f.testsuite_delays = FALSE;
3037 /* -odf: foreground delivery (smail-compatible option); same effect as
3038 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3041 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3043 f.synchronous_delivery = TRUE;
3044 arg_queue_only = FALSE;
3045 queue_only_set = TRUE;
3048 /* -odq: queue only */
3050 else if (Ustrcmp(argrest, "q") == 0)
3052 f.synchronous_delivery = FALSE;
3053 arg_queue_only = TRUE;
3054 queue_only_set = TRUE;
3057 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3058 but no remote delivery */
3060 else if (Ustrcmp(argrest, "qs") == 0)
3062 f.queue_smtp = TRUE;
3063 arg_queue_only = FALSE;
3064 queue_only_set = TRUE;
3069 /* -oex: Sendmail error flags. As these are also accepted without the
3070 leading -o prefix, for compatibility with vacation and other callers,
3071 they are handled with -e above. */
3073 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3074 -oitrue: Another sendmail syntax for the same */
3077 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3082 /* -oM*: Set various characteristics for an incoming message; actually
3083 acted on for trusted callers only. */
3088 exim_fail("exim: data expected after -oM%s\n", argrest);
3090 /* -oMa: Set sender host address */
3092 if (Ustrcmp(argrest, "a") == 0)
3093 sender_host_address = string_copy_taint(argv[++i], TRUE);
3095 /* -oMaa: Set authenticator name */
3097 else if (Ustrcmp(argrest, "aa") == 0)
3098 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3100 /* -oMas: setting authenticated sender */
3102 else if (Ustrcmp(argrest, "as") == 0)
3103 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3105 /* -oMai: setting authenticated id */
3107 else if (Ustrcmp(argrest, "ai") == 0)
3108 authenticated_id = string_copy_taint(argv[++i], TRUE);
3110 /* -oMi: Set incoming interface address */
3112 else if (Ustrcmp(argrest, "i") == 0)
3113 interface_address = string_copy_taint(argv[++i], TRUE);
3115 /* -oMm: Message reference */
3117 else if (Ustrcmp(argrest, "m") == 0)
3119 if (!mac_ismsgid(argv[i+1]))
3120 exim_fail("-oMm must be a valid message ID\n");
3121 if (!f.trusted_config)
3122 exim_fail("-oMm must be called by a trusted user/config\n");
3123 message_reference = argv[++i];
3126 /* -oMr: Received protocol */
3128 else if (Ustrcmp(argrest, "r") == 0)
3130 if (received_protocol)
3131 exim_fail("received_protocol is set already\n");
3133 received_protocol = string_copy_taint(argv[++i], TRUE);
3135 /* -oMs: Set sender host name */
3137 else if (Ustrcmp(argrest, "s") == 0)
3138 sender_host_name = string_copy_taint(argv[++i], TRUE);
3140 /* -oMt: Set sender ident */
3142 else if (Ustrcmp(argrest, "t") == 0)
3144 sender_ident_set = TRUE;
3145 sender_ident = string_copy_taint(argv[++i], TRUE);
3148 /* Else a bad argument */
3155 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3156 seem to call this as -m (undocumented), so that is also accepted (see
3158 /* -oo: An ancient flag for old-style addresses which still seems to
3159 crop up in some calls (see in SCO). */
3163 if (*argrest) badarg = TRUE;
3166 /* -oP <name>: set pid file path for daemon
3167 -oPX: delete pid file of daemon */
3170 if (!*argrest) override_pid_file_path = argv[++i];
3171 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3176 /* -or <n>: set timeout for non-SMTP acceptance
3177 -os <n>: set timeout for SMTP acceptance */
3182 int * tp = argrest[-1] == 'r'
3183 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3185 *tp = readconf_readtime(argrest, 0, FALSE);
3186 else if (i+1 < argc)
3187 *tp = readconf_readtime(argv[++i], 0, FALSE);
3190 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3194 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3197 if (*argrest) badarg = TRUE;
3198 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3201 /* Unknown -o argument */
3209 /* -ps: force Perl startup; -pd force delayed Perl startup */
3213 if (*argrest == 's' && argrest[1] == 0)
3215 perl_start_option = 1;
3218 if (*argrest == 'd' && argrest[1] == 0)
3220 perl_start_option = -1;
3225 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3226 which sets the host protocol and host name */
3229 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3233 uschar * hn = Ustrchr(argrest, ':');
3235 if (received_protocol)
3236 exim_fail("received_protocol is set already\n");
3239 received_protocol = string_copy_taint(argrest, TRUE);
3242 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3243 sender_host_name = string_copy_taint(hn + 1, TRUE);
3250 receiving_message = FALSE;
3251 if (queue_interval >= 0)
3252 exim_fail("exim: -q specified more than once\n");
3254 /* -qq...: Do queue runs in a 2-stage manner */
3256 if (*argrest == 'q')
3258 f.queue_2stage = TRUE;
3262 /* -qi...: Do only first (initial) deliveries */
3264 if (*argrest == 'i')
3266 f.queue_run_first_delivery = TRUE;
3270 /* -qf...: Run the queue, forcing deliveries
3271 -qff..: Ditto, forcing thawing as well */
3273 if (*argrest == 'f')
3275 f.queue_run_force = TRUE;
3276 if (*++argrest == 'f')
3278 f.deliver_force_thaw = TRUE;
3283 /* -q[f][f]l...: Run the queue only on local deliveries */
3285 if (*argrest == 'l')
3287 f.queue_run_local = TRUE;
3291 /* -q[f][f][l][G<name>]... Work on the named queue */
3293 if (*argrest == 'G')
3296 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3297 queue_name = string_copyn(argrest, i);
3299 if (*argrest == '/') argrest++;
3302 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3303 only, optionally named, optionally starting from a given message id. */
3305 if (!(list_queue || count_queue))
3307 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3310 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3311 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3312 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3313 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3316 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3317 forced, optionally local only, optionally named. */
3319 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3321 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3325 case 'R': /* Synonymous with -qR... */
3326 receiving_message = FALSE;
3328 /* -Rf: As -R (below) but force all deliveries,
3329 -Rff: Ditto, but also thaw all frozen messages,
3330 -Rr: String is regex
3331 -Rrf: Regex and force
3332 -Rrff: Regex and force and thaw
3334 in all cases provided there are no further characters in this
3338 for (int i = 0; i < nelem(rsopts); i++)
3339 if (Ustrcmp(argrest, rsopts[i]) == 0)
3341 if (i != 2) f.queue_run_force = TRUE;
3342 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3343 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3344 argrest += Ustrlen(rsopts[i]);
3347 /* -R: Set string to match in addresses for forced queue run to
3348 pick out particular messages. */
3351 deliver_selectstring = string_copy_taint(argrest, TRUE);
3352 else if (i+1 < argc)
3353 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3355 exim_fail("exim: string expected after -R\n");
3359 /* -r: an obsolete synonym for -f (see above) */
3362 /* -S: Like -R but works on sender. */
3364 case 'S': /* Synonymous with -qS... */
3365 receiving_message = FALSE;
3367 /* -Sf: As -S (below) but force all deliveries,
3368 -Sff: Ditto, but also thaw all frozen messages,
3369 -Sr: String is regex
3370 -Srf: Regex and force
3371 -Srff: Regex and force and thaw
3373 in all cases provided there are no further characters in this
3377 for (int i = 0; i < nelem(rsopts); i++)
3378 if (Ustrcmp(argrest, rsopts[i]) == 0)
3380 if (i != 2) f.queue_run_force = TRUE;
3381 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3382 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3383 argrest += Ustrlen(rsopts[i]);
3386 /* -S: Set string to match in addresses for forced queue run to
3387 pick out particular messages. */
3390 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3391 else if (i+1 < argc)
3392 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3394 exim_fail("exim: string expected after -S\n");
3397 /* -Tqt is an option that is exclusively for use by the testing suite.
3398 It is not recognized in other circumstances. It allows for the setting up
3399 of explicit "queue times" so that various warning/retry things can be
3400 tested. Otherwise variability of clock ticks etc. cause problems. */
3403 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3404 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3409 /* -t: Set flag to extract recipients from body of message. */
3412 if (!*argrest) extract_recipients = TRUE;
3414 /* -ti: Set flag to extract recipients from body of message, and also
3415 specify that dot does not end the message. */
3417 else if (Ustrcmp(argrest, "i") == 0)
3419 extract_recipients = TRUE;
3423 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3426 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3433 /* -U: This means "initial user submission" in sendmail, apparently. The
3434 doc claims that in future sendmail may refuse syntactically invalid
3435 messages instead of fixing them. For the moment, we just ignore it. */
3441 /* -v: verify things - this is a very low-level debugging */
3446 debug_selector |= D_v;
3447 debug_file = stderr;
3453 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3455 The -x flag tells the sendmail command that mail from a local
3456 mail program has National Language Support (NLS) extended characters
3457 in the body of the mail item. The sendmail command can send mail with
3458 extended NLS characters across networks that normally corrupts these
3461 As Exim is 8-bit clean, it just ignores this flag. */
3464 if (*argrest) badarg = TRUE;
3467 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3468 logs to that file. We swallow the parameter and otherwise ignore it. */
3473 exim_fail("exim: string expected after -X\n");
3479 log_oneline = string_copy_taint(argv[i], TRUE);
3481 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3484 /* All other initial characters are errors */
3489 } /* End of high-level switch statement */
3491 /* Failed to recognize the option, or syntax error */
3494 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3495 "option %s\n", arg);
3499 /* If -R or -S have been specified without -q, assume a single queue run. */
3501 if ( (deliver_selectstring || deliver_selectstring_sender)
3502 && queue_interval < 0)
3507 store_pool = old_pool;
3510 /* If usage_wanted is set we call the usage function - which never returns */
3511 if (usage_wanted) exim_usage(called_as);
3513 /* Arguments have been processed. Check for incompatibilities. */
3514 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3515 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3516 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3517 || filter_test != FTEST_NONE
3518 || msg_action_arg > 0 && !one_msg_action
3520 || ( msg_action_arg > 0
3521 && ( f.daemon_listen || queue_interval > 0 || list_options
3522 || checking && msg_action != MSG_LOAD
3523 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3525 || ( (f.daemon_listen || queue_interval > 0)
3526 && ( sender_address || list_options || list_queue || checking
3529 || f.daemon_listen && queue_interval == 0
3530 || f.inetd_wait_mode && queue_interval >= 0
3532 && ( checking || smtp_input || extract_recipients
3533 || filter_test != FTEST_NONE || bi_option
3535 || ( verify_address_mode
3536 && ( f.address_test_mode || smtp_input || extract_recipients
3537 || filter_test != FTEST_NONE || bi_option
3539 || ( f.address_test_mode
3540 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3544 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3546 || deliver_selectstring && queue_interval < 0
3547 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3549 exim_fail("exim: incompatible command-line options or arguments\n");
3551 /* If debugging is set up, set the file and the file descriptor to pass on to
3552 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3553 to run in the foreground. */
3555 if (debug_selector != 0)
3557 debug_file = stderr;
3558 debug_fd = fileno(debug_file);
3559 f.background_daemon = FALSE;
3560 testharness_pause_ms(100); /* lets caller finish */
3561 if (debug_selector != D_v) /* -v only doesn't show this */
3563 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3564 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3566 if (!version_printed)
3567 show_whats_supported(stderr);
3571 /* When started with root privilege, ensure that the limits on the number of
3572 open files and the number of processes (where that is accessible) are
3573 sufficiently large, or are unset, in case Exim has been called from an
3574 environment where the limits are screwed down. Not all OS have the ability to
3575 change some of these limits. */
3579 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3585 #ifdef RLIMIT_NOFILE
3586 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3588 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3590 rlp.rlim_cur = rlp.rlim_max = 0;
3593 /* I originally chose 1000 as a nice big number that was unlikely to
3594 be exceeded. It turns out that some older OS have a fixed upper limit of
3597 if (rlp.rlim_cur < 1000)
3599 rlp.rlim_cur = rlp.rlim_max = 1000;
3600 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3602 rlp.rlim_cur = rlp.rlim_max = 256;
3603 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3604 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3611 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3613 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3615 rlp.rlim_cur = rlp.rlim_max = 0;
3618 #ifdef RLIM_INFINITY
3619 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3621 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3623 if (rlp.rlim_cur < 1000)
3625 rlp.rlim_cur = rlp.rlim_max = 1000;
3627 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3628 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3634 /* Exim is normally entered as root (but some special configurations are
3635 possible that don't do this). However, it always spins off sub-processes that
3636 set their uid and gid as required for local delivery. We don't want to pass on
3637 any extra groups that root may belong to, so we want to get rid of them all at
3640 We need to obey setgroups() at this stage, before possibly giving up root
3641 privilege for a changed configuration file, but later on we might need to
3642 check on the additional groups for the admin user privilege - can't do that
3643 till after reading the config, which might specify the exim gid. Therefore,
3644 save the group list here first. */
3646 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3647 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3649 /* There is a fundamental difference in some BSD systems in the matter of
3650 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3651 known not to be different. On the "different" systems there is a single group
3652 list, and the first entry in it is the current group. On all other versions of
3653 Unix there is a supplementary group list, which is in *addition* to the current
3654 group. Consequently, to get rid of all extraneous groups on a "standard" system
3655 you pass over 0 groups to setgroups(), while on a "different" system you pass
3656 over a single group - the current group, which is always the first group in the
3657 list. Calling setgroups() with zero groups on a "different" system results in
3658 an error return. The following code should cope with both types of system.
3660 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3661 the "setgroups() with zero groups" - and changes the egid.
3662 Thanks to that we had to stash the original_egid above, for use below
3663 in the call to exim_setugid().
3665 However, if this process isn't running as root, setgroups() can't be used
3666 since you have to be root to run it, even if throwing away groups.
3667 Except, sigh, for Hurd - where you can.
3668 Not being root here happens only in some unusual configurations. */
3671 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3672 && setgroups(0, NULL) != 0
3674 && setgroups(1, group_list) != 0)
3675 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3677 /* If the configuration file name has been altered by an argument on the
3678 command line (either a new file name or a macro definition) and the caller is
3679 not root, or if this is a filter testing run, remove any setuid privilege the
3680 program has and run as the underlying user.
3682 The exim user is locked out of this, which severely restricts the use of -C
3685 Otherwise, set the real ids to the effective values (should be root unless run
3686 from inetd, which it can either be root or the exim uid, if one is configured).
3688 There is a private mechanism for bypassing some of this, in order to make it
3689 possible to test lots of configurations automatically, without having either to
3690 recompile each time, or to patch in an actual configuration file name and other
3691 values (such as the path name). If running in the test harness, pretend that
3692 configuration file changes and macro definitions haven't happened. */
3695 (!f.trusted_config || /* Config changed, or */
3696 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3697 real_uid != root_uid && /* Not root, and */
3698 !f.running_in_test_harness /* Not fudged */
3700 expansion_test /* expansion testing */
3702 filter_test != FTEST_NONE) /* Filter testing */
3704 setgroups(group_count, group_list);
3705 exim_setugid(real_uid, real_gid, FALSE,
3706 US"-C, -D, -be or -bf forces real uid");
3707 removed_privilege = TRUE;
3709 /* In the normal case when Exim is called like this, stderr is available
3710 and should be used for any logging information because attempts to write
3711 to the log will usually fail. To arrange this, we unset really_exim. However,
3712 if no stderr is available there is no point - we might as well have a go
3713 at the log (if it fails, syslog will be written).
3715 Note that if the invoker is Exim, the logs remain available. Messing with
3716 this causes unlogged successful deliveries. */
3718 if (log_stderr && real_uid != exim_uid)
3719 f.really_exim = FALSE;
3722 /* Privilege is to be retained for the moment. It may be dropped later,
3723 depending on the job that this Exim process has been asked to do. For now, set
3724 the real uid to the effective so that subsequent re-execs of Exim are done by a
3728 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3730 /* If testing a filter, open the file(s) now, before wasting time doing other
3731 setups and reading the message. */
3733 if (filter_test & FTEST_SYSTEM)
3734 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3735 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3738 if (filter_test & FTEST_USER)
3739 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3740 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3743 /* Initialise lookup_list
3744 If debugging, already called above via version reporting.
3745 In either case, we initialise the list of available lookups while running
3746 as root. All dynamically modules are loaded from a directory which is
3747 hard-coded into the binary and is code which, if not a module, would be
3748 part of Exim already. Ability to modify the content of the directory
3749 is equivalent to the ability to modify a setuid binary!
3751 This needs to happen before we read the main configuration. */
3755 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3758 /* Read the main runtime configuration data; this gives up if there
3759 is a failure. It leaves the configuration file open so that the subsequent
3760 configuration data for delivery can be read if needed.
3762 NOTE: immediately after opening the configuration file we change the working
3763 directory to "/"! Later we change to $spool_directory. We do it there, because
3764 during readconf_main() some expansion takes place already. */
3766 /* Store the initial cwd before we change directories. Can be NULL if the
3767 dir has already been unlinked. */
3768 initial_cwd = os_getcwd(NULL, 0);
3771 -be[m] expansion test -
3772 -b[fF] filter test new
3774 -bmalware malware_test_file new
3776 -brw rewrite test new
3778 -bv[s] address verify -
3780 -bP <option> (except -bP config, which sets list_config)
3782 If any of these options is set, we suppress warnings about configuration
3783 issues (currently about tls_advertise_hosts and keep_environment not being
3787 #ifdef MEASURE_TIMING
3788 struct timeval t0, diff;
3789 (void)gettimeofday(&t0, NULL);
3792 readconf_main(checking || list_options);
3794 #ifdef MEASURE_TIMING
3795 report_time_since(&t0, US"readconf_main (delta)");
3800 /* Now in directory "/" */
3802 if (cleanup_environment() == FALSE)
3803 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3806 /* If an action on specific messages is requested, or if a daemon or queue
3807 runner is being started, we need to know if Exim was called by an admin user.
3808 This is the case if the real user is root or exim, or if the real group is
3809 exim, or if one of the supplementary groups is exim or a group listed in
3810 admin_groups. We don't fail all message actions immediately if not admin_user,
3811 since some actions can be performed by non-admin users. Instead, set admin_user
3812 for later interrogation. */
3814 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3815 f.admin_user = TRUE;
3817 for (int i = 0; i < group_count && !f.admin_user; i++)
3818 if (group_list[i] == exim_gid)
3819 f.admin_user = TRUE;
3820 else if (admin_groups)
3821 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3822 if (admin_groups[j] == group_list[i])
3823 f.admin_user = TRUE;
3825 /* Another group of privileged users are the trusted users. These are root,
3826 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3827 are permitted to specify sender_addresses with -f on the command line, and
3828 other message parameters as well. */
3830 if (real_uid == root_uid || real_uid == exim_uid)
3831 f.trusted_caller = TRUE;
3835 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3836 if (trusted_users[i] == real_uid)
3837 f.trusted_caller = TRUE;
3840 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3841 if (trusted_groups[i] == real_gid)
3842 f.trusted_caller = TRUE;
3843 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3844 if (trusted_groups[i] == group_list[j])
3845 f.trusted_caller = TRUE;
3848 /* At this point, we know if the user is privileged and some command-line
3849 options become possibly impermissible, depending upon the configuration file. */
3851 if (checking && commandline_checks_require_admin && !f.admin_user)
3852 exim_fail("exim: those command-line flags are set to require admin\n");
3854 /* Handle the decoding of logging options. */
3856 decode_bits(log_selector, log_selector_size, log_notall,
3857 log_selector_string, log_options, log_options_count, US"log", 0);
3861 debug_printf("configuration file is %s\n", config_main_filename);
3862 debug_printf("log selectors =");
3863 for (int i = 0; i < log_selector_size; i++)
3864 debug_printf(" %08x", log_selector[i]);
3868 /* If domain literals are not allowed, check the sender address that was
3869 supplied with -f. Ditto for a stripped trailing dot. */
3873 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3874 exim_fail("exim: bad -f address \"%s\": domain literals not "
3875 "allowed\n", sender_address);
3876 if (f_end_dot && !strip_trailing_dot)
3877 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3878 "(trailing dot not allowed)\n", sender_address);
3881 /* See if an admin user overrode our logging. */
3883 if (cmdline_syslog_name)
3886 syslog_processname = cmdline_syslog_name;
3887 log_file_path = string_copy(CUS"syslog");
3890 /* not a panic, non-privileged users should not be able to spam paniclog */
3892 "exim: you lack sufficient privilege to specify syslog process name\n");
3894 /* Paranoia check of maximum lengths of certain strings. There is a check
3895 on the length of the log file path in log.c, which will come into effect
3896 if there are any calls to write the log earlier than this. However, if we
3897 get this far but the string is very long, it is better to stop now than to
3898 carry on and (e.g.) receive a message and then have to collapse. The call to
3899 log_write() from here will cause the ultimate panic collapse if the complete
3900 file name exceeds the buffer length. */
3902 if (Ustrlen(log_file_path) > 200)
3903 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3904 "log_file_path is longer than 200 chars: aborting");
3906 if (Ustrlen(pid_file_path) > 200)
3907 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3908 "pid_file_path is longer than 200 chars: aborting");
3910 if (Ustrlen(spool_directory) > 200)
3911 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3912 "spool_directory is longer than 200 chars: aborting");
3914 /* Length check on the process name given to syslog for its TAG field,
3915 which is only permitted to be 32 characters or less. See RFC 3164. */
3917 if (Ustrlen(syslog_processname) > 32)
3918 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3919 "syslog_processname is longer than 32 chars: aborting");
3924 log_write(0, LOG_MAIN, "%s", log_oneline);
3925 return EXIT_SUCCESS;
3928 return EXIT_FAILURE;
3930 /* In some operating systems, the environment variable TMPDIR controls where
3931 temporary files are created; Exim doesn't use these (apart from when delivering
3932 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3933 If TMPDIR is found in the environment, reset it to the value defined in the
3934 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3935 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3936 EXIM_TMPDIR by the build scripts.
3940 if (environ) for (uschar ** p = USS environ; *p; p++)
3941 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3943 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3944 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3946 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3950 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3951 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3952 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3953 called by a user who has set the TZ variable. This then affects the timestamps
3954 in log files and in Received: headers, and any created Date: header lines. The
3955 required timezone is settable in the configuration file, so nothing can be done
3956 about this earlier - but hopefully nothing will normally be logged earlier than
3957 this. We have to make a new environment if TZ is wrong, but don't bother if
3958 timestamps_utc is set, because then all times are in UTC anyway. */
3960 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3961 f.timestamps_utc = TRUE;
3964 uschar *envtz = US getenv("TZ");
3966 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3967 : timezone_string != NULL
3970 uschar **p = USS environ;
3974 if (environ) while (*p++) count++;
3975 if (!envtz) count++;
3976 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3977 if (environ) for (p = USS environ; *p; p++)
3978 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3979 if (timezone_string)
3981 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3982 sprintf(CS *newp++, "TZ=%s", timezone_string);
3987 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3988 tod_stamp(tod_log));
3992 /* Handle the case when we have removed the setuid privilege because of -C or
3993 -D. This means that the caller of Exim was not root.
3995 There is a problem if we were running as the Exim user. The sysadmin may
3996 expect this case to retain privilege because "the binary was called by the
3997 Exim user", but it hasn't, because either the -D option set macros, or the
3998 -C option set a non-trusted configuration file. There are two possibilities:
4000 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4001 to do message deliveries. Thus, the fact that it is running as a
4002 non-privileged user is plausible, and might be wanted in some special
4003 configurations. However, really_exim will have been set false when
4004 privilege was dropped, to stop Exim trying to write to its normal log
4005 files. Therefore, re-enable normal log processing, assuming the sysadmin
4006 has set up the log directory correctly.
4008 (2) If deliver_drop_privilege is not set, the configuration won't work as
4009 apparently intended, and so we log a panic message. In order to retain
4010 root for -C or -D, the caller must either be root or be invoking a
4011 trusted configuration file (when deliver_drop_privilege is false). */
4013 if ( removed_privilege
4014 && (!f.trusted_config || opt_D_used)
4015 && real_uid == exim_uid)
4016 if (deliver_drop_privilege)
4017 f.really_exim = TRUE; /* let logging work normally */
4019 log_write(0, LOG_MAIN|LOG_PANIC,
4020 "exim user lost privilege for using %s option",
4021 f.trusted_config? "-D" : "-C");
4023 /* Start up Perl interpreter if Perl support is configured and there is a
4024 perl_startup option, and the configuration or the command line specifies
4025 initializing starting. Note that the global variables are actually called
4026 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4029 if (perl_start_option != 0)
4030 opt_perl_at_start = (perl_start_option > 0);
4031 if (opt_perl_at_start && opt_perl_startup != NULL)
4034 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4035 if ((errstr = init_perl(opt_perl_startup)))
4036 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4037 opt_perl_started = TRUE;
4039 #endif /* EXIM_PERL */
4041 /* Log the arguments of the call if the configuration file said so. This is
4042 a debugging feature for finding out what arguments certain MUAs actually use.
4043 Don't attempt it if logging is disabled, or if listing variables or if
4044 verifying/testing addresses or expansions. */
4046 if ( (debug_selector & D_any || LOGGING(arguments))
4047 && f.really_exim && !list_options && !checking)
4049 uschar *p = big_buffer;
4050 Ustrcpy(p, US"cwd= (failed)");
4056 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4057 p += 4 + Ustrlen(initial_cwd);
4058 /* in case p is near the end and we don't provide enough space for
4059 * string_format to be willing to write. */
4063 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4065 for (int i = 0; i < argc; i++)
4067 int len = Ustrlen(argv[i]);
4068 const uschar *printing;
4070 if (p + len + 8 >= big_buffer + big_buffer_size)
4072 Ustrcpy(p, US" ...");
4073 log_write(0, LOG_MAIN, "%s", big_buffer);
4074 Ustrcpy(big_buffer, US"...");
4077 printing = string_printing(argv[i]);
4078 if (!*printing) quote = US"\"";
4081 const uschar *pp = printing;
4083 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4085 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4086 (p - big_buffer) - 4), printing, quote);
4089 if (LOGGING(arguments))
4090 log_write(0, LOG_MAIN, "%s", big_buffer);
4092 debug_printf("%s\n", big_buffer);
4095 /* Set the working directory to be the top-level spool directory. We don't rely
4096 on this in the code, which always uses fully qualified names, but it's useful
4097 for core dumps etc. Don't complain if it fails - the spool directory might not
4098 be generally accessible and calls with the -C option (and others) have lost
4099 privilege by now. Before the chdir, we try to ensure that the directory exists.
4102 if (Uchdir(spool_directory) != 0)
4104 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4105 (void) Uchdir(spool_directory);
4108 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4109 alias file. Exim doesn't have such a concept, but this call is screwed into
4110 Sun's YP makefiles. Handle this by calling a configured script, as the real
4111 user who called Exim. The -oA option can be used to pass an argument to the
4116 (void) fclose(config_file);
4117 if (bi_command && *bi_command)
4121 argv[i++] = bi_command;
4122 if (alias_arg) argv[i++] = alias_arg;
4125 setgroups(group_count, group_list);
4126 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4128 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4129 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4131 execv(CS argv[0], (char *const *)argv);
4132 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4136 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4141 /* We moved the admin/trusted check to be immediately after reading the
4142 configuration file. We leave these prints here to ensure that syslog setup,
4143 logfile setup, and so on has already happened. */
4145 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4146 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4148 /* Only an admin user may start the daemon or force a queue run in the default
4149 configuration, but the queue run restriction can be relaxed. Only an admin
4150 user may request that a message be returned to its sender forthwith. Only an
4151 admin user may specify a debug level greater than D_v (because it might show
4152 passwords, etc. in lookup queries). Only an admin user may request a queue
4153 count. Only an admin user can use the test interface to scan for email
4154 (because Exim will be in the spool dir and able to look at mails). */
4158 BOOL debugset = (debug_selector & ~D_v) != 0;
4159 if ( deliver_give_up || f.daemon_listen || malware_test_file
4160 || count_queue && queue_list_requires_admin
4161 || list_queue && queue_list_requires_admin
4162 || queue_interval >= 0 && prod_requires_admin
4163 || queue_name_dest && prod_requires_admin
4164 || debugset && !f.running_in_test_harness
4166 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4169 /* If the real user is not root or the exim uid, the argument for passing
4170 in an open TCP/IP connection for another message is not permitted, nor is
4171 running with the -N option for any delivery action, unless this call to exim is
4172 one that supplied an input message, or we are using a patched exim for
4173 regression testing. */
4175 if ( real_uid != root_uid && real_uid != exim_uid
4176 && ( continue_hostname
4178 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4180 && !f.running_in_test_harness
4182 exim_fail("exim: Permission denied\n");
4184 /* If the caller is not trusted, certain arguments are ignored when running for
4185 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4186 Note that authority for performing certain actions on messages is tested in the
4187 queue_action() function. */
4189 if (!f.trusted_caller && !checking)
4191 sender_host_name = sender_host_address = interface_address =
4192 sender_ident = received_protocol = NULL;
4193 sender_host_port = interface_port = 0;
4194 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4197 /* If a sender host address is set, extract the optional port number off the
4198 end of it and check its syntax. Do the same thing for the interface address.
4199 Exim exits if the syntax is bad. */
4203 if (sender_host_address)
4204 sender_host_port = check_port(sender_host_address);
4205 if (interface_address)
4206 interface_port = check_port(interface_address);
4209 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4212 if (f.trusted_caller)
4214 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4215 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4218 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4221 /* If an SMTP message is being received check to see if the standard input is a
4222 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4223 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4228 union sockaddr_46 inetd_sock;
4229 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4230 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4232 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4233 if (family == AF_INET || family == AF_INET6)
4235 union sockaddr_46 interface_sock;
4236 size = sizeof(interface_sock);
4238 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4239 interface_address = host_ntoa(-1, &interface_sock, NULL,
4242 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4244 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4247 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4248 NULL, &sender_host_port);
4249 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4250 "inetd is not supported when mua_wrapper is set");
4254 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4259 /* If the load average is going to be needed while receiving a message, get it
4260 now for those OS that require the first call to os_getloadavg() to be done as
4261 root. There will be further calls later for each message received. */
4263 #ifdef LOAD_AVG_NEEDS_ROOT
4264 if ( receiving_message
4265 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4266 load_average = OS_GETLOADAVG();
4269 /* The queue_only configuration option can be overridden by -odx on the command
4270 line, except that if queue_only_override is false, queue_only cannot be unset
4271 from the command line. */
4273 if (queue_only_set && (queue_only_override || arg_queue_only))
4274 queue_only = arg_queue_only;
4276 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4279 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4280 if (arg_smtp_receive_timeout >= 0)
4281 smtp_receive_timeout = arg_smtp_receive_timeout;
4283 /* If Exim was started with root privilege, unless we have already removed the
4284 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4285 except when starting the daemon or doing some kind of delivery or address
4286 testing (-bt). These are the only cases when root need to be retained. We run
4287 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4288 retained only for starting the daemon. We always do the initgroups() in this
4289 situation (controlled by the TRUE below), in order to be as close as possible
4290 to the state Exim usually runs in. */
4292 if ( !unprivileged /* originally had root AND */
4293 && !removed_privilege /* still got root AND */
4294 && !f.daemon_listen /* not starting the daemon */
4295 && queue_interval <= 0 /* (either kind of daemon) */
4296 && ( /* AND EITHER */
4297 deliver_drop_privilege /* requested unprivileged */
4299 queue_interval < 0 /* not running the queue */
4300 && ( msg_action_arg < 0 /* and */
4301 || msg_action != MSG_DELIVER /* not delivering */
4303 && (!checking || !f.address_test_mode) /* not address checking */
4304 && !rcpt_verify_quota /* and not quota checking */
4306 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4308 /* When we are retaining a privileged uid, we still change to the exim gid. */
4313 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4314 rv = setgid(exim_gid);
4315 /* Impact of failure is that some stuff might end up with an incorrect group.
4316 We track this for failures from root, since any attempt to change privilege
4317 by root should succeed and failures should be examined. For non-root,
4318 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4319 no need to complain then. */
4321 if (!(unprivileged || removed_privilege))
4322 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4325 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4326 (long int)exim_gid, strerror(errno));
4330 /* Handle a request to scan a file for malware */
4331 if (malware_test_file)
4333 #ifdef WITH_CONTENT_SCAN
4335 set_process_info("scanning file for malware");
4336 if ((result = malware_in_file(malware_test_file)) == FAIL)
4338 printf("No malware found.\n");
4343 printf("Malware lookup returned non-okay/fail: %d\n", result);
4347 printf("Malware found: %s\n", malware_name);
4349 printf("Malware scan detected malware of unknown name.\n");
4351 printf("Malware scanning not enabled at compile time.\n");
4356 /* Handle a request to list the delivery queue */
4360 set_process_info("listing the queue");
4361 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4365 /* Handle a request to count the delivery queue */
4369 set_process_info("counting the queue");
4370 fprintf(stdout, "%u\n", queue_count());
4374 /* Handle actions on specific messages, except for the force delivery and
4375 message load actions, which are done below. Some actions take a whole list of
4376 message ids, which are known to continue up to the end of the arguments. Others
4377 take a single message id and then operate on the recipients list. */
4379 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4381 int yield = EXIT_SUCCESS;
4382 set_process_info("acting on specified messages");
4384 /* ACL definitions may be needed when removing a message (-Mrm) because
4385 event_action gets expanded */
4387 if (msg_action == MSG_REMOVE)
4390 if (!one_msg_action)
4392 for (i = msg_action_arg; i < argc; i++)
4393 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4394 yield = EXIT_FAILURE;
4397 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4398 default: printf("\n"); break;
4402 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4403 recipients_arg)) yield = EXIT_FAILURE;
4407 /* We used to set up here to skip reading the ACL section, on
4408 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4409 Now, since the intro of the ${acl } expansion, ACL definitions may be
4410 needed in transports so we lost the optimisation. */
4413 #ifdef MEASURE_TIMING
4414 struct timeval t0, diff;
4415 (void)gettimeofday(&t0, NULL);
4420 #ifdef MEASURE_TIMING
4421 report_time_since(&t0, US"readconf_rest (delta)");
4425 /* Handle a request to check quota */
4426 if (rcpt_verify_quota)
4427 if (real_uid != root_uid && real_uid != exim_uid)
4428 exim_fail("exim: Permission denied\n");
4429 else if (recipients_arg >= argc)
4430 exim_fail("exim: missing recipient for quota check\n");
4433 verify_quota(argv[recipients_arg]);
4434 exim_exit(EXIT_SUCCESS);
4437 /* Handle the -brt option. This is for checking out retry configurations.
4438 The next three arguments are a domain name or a complete address, and
4439 optionally two error numbers. All it does is to call the function that
4440 scans the retry configuration data. */
4442 if (test_retry_arg >= 0)
4444 retry_config *yield;
4445 int basic_errno = 0;
4449 if (test_retry_arg >= argc)
4451 printf("-brt needs a domain or address argument\n");
4452 exim_exit(EXIT_FAILURE);
4454 s1 = argv[test_retry_arg++];
4457 /* If the first argument contains no @ and no . it might be a local user
4458 or it might be a single-component name. Treat as a domain. */
4460 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4462 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4463 "being \ntreated as a one-component domain, not as a local part.\n\n",
4467 /* There may be an optional second domain arg. */
4469 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4470 s2 = argv[test_retry_arg++];
4472 /* The final arg is an error name */
4474 if (test_retry_arg < argc)
4476 uschar *ss = argv[test_retry_arg];
4478 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4481 printf("%s\n", CS error);
4482 return EXIT_FAILURE;
4485 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4486 code > 100 as an error is for matching codes to the decade. Turn them into
4487 a real error code, off the decade. */
4489 if (basic_errno == ERRNO_MAIL4XX ||
4490 basic_errno == ERRNO_RCPT4XX ||
4491 basic_errno == ERRNO_DATA4XX)
4493 int code = (more_errno >> 8) & 255;
4495 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4496 else if (code > 100)
4497 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4501 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4502 printf("No retry information found\n");
4505 more_errno = yield->more_errno;
4506 printf("Retry rule: %s ", yield->pattern);
4508 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4510 printf("quota%s%s ",
4511 (more_errno > 0)? "_" : "",
4512 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4514 else if (yield->basic_errno == ECONNREFUSED)
4516 printf("refused%s%s ",
4517 (more_errno > 0)? "_" : "",
4518 (more_errno == 'M')? "MX" :
4519 (more_errno == 'A')? "A" : "");
4521 else if (yield->basic_errno == ETIMEDOUT)
4524 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4526 if (more_errno != 0) printf("_%s",
4527 (more_errno == 'M')? "MX" : "A");
4530 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4531 printf("auth_failed ");
4534 for (retry_rule * r = yield->rules; r; r = r->next)
4536 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4537 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4543 printf(",%d.", x/1000);
4557 exim_exit(EXIT_SUCCESS);
4560 /* Handle a request to list one or more configuration options */
4561 /* If -n was set, we suppress some information */
4566 set_process_info("listing variables");
4567 if (recipients_arg >= argc)
4568 fail = !readconf_print(US"all", NULL, flag_n);
4569 else for (i = recipients_arg; i < argc; i++)
4572 (Ustrcmp(argv[i], "router") == 0 ||
4573 Ustrcmp(argv[i], "transport") == 0 ||
4574 Ustrcmp(argv[i], "authenticator") == 0 ||
4575 Ustrcmp(argv[i], "macro") == 0 ||
4576 Ustrcmp(argv[i], "environment") == 0))
4578 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4582 fail = !readconf_print(argv[i], NULL, flag_n);
4584 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4589 set_process_info("listing config");
4590 exim_exit(readconf_print(US"config", NULL, flag_n)
4591 ? EXIT_SUCCESS : EXIT_FAILURE);
4595 /* Initialise subsystems as required. */
4599 /* Handle a request to deliver one or more messages that are already on the
4600 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4601 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4603 Delivery of specific messages is typically used for a small number when
4604 prodding by hand (when the option forced_delivery will be set) or when
4605 re-execing to regain root privilege. Each message delivery must happen in a
4606 separate process, so we fork a process for each one, and run them sequentially
4607 so that debugging output doesn't get intertwined, and to avoid spawning too
4608 many processes if a long list is given. However, don't fork for the last one;
4609 this saves a process in the common case when Exim is called to deliver just one
4612 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4614 if (prod_requires_admin && !f.admin_user)
4616 fprintf(stderr, "exim: Permission denied\n");
4617 exim_exit(EXIT_FAILURE);
4619 set_process_info("delivering specified messages");
4620 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4621 for (i = msg_action_arg; i < argc; i++)
4625 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4626 that runs into a later copy into the untainted global message_id[] */
4628 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4629 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4631 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4632 exim_underbar_exit(EXIT_SUCCESS);
4636 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4638 exim_exit(EXIT_FAILURE);
4642 exim_exit(EXIT_SUCCESS);
4646 /* If only a single queue run is requested, without SMTP listening, we can just
4647 turn into a queue runner, with an optional starting message id. */
4649 if (queue_interval == 0 && !f.daemon_listen)
4651 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4652 start_queue_run_id ? US" starting at " : US"",
4653 start_queue_run_id ? start_queue_run_id: US"",
4654 stop_queue_run_id ? US" stopping at " : US"",
4655 stop_queue_run_id ? stop_queue_run_id : US"");
4657 set_process_info("running the '%s' queue (single queue run)", queue_name);
4659 set_process_info("running the queue (single queue run)");
4660 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4661 exim_exit(EXIT_SUCCESS);
4665 /* Find the login name of the real user running this process. This is always
4666 needed when receiving a message, because it is written into the spool file. It
4667 may also be used to construct a from: or a sender: header, and in this case we
4668 need the user's full name as well, so save a copy of it, checked for RFC822
4669 syntax and munged if necessary, if it hasn't previously been set by the -F
4670 argument. We may try to get the passwd entry more than once, in case NIS or
4671 other delays are in evidence. Save the home directory for use in filter testing
4676 if ((pw = getpwuid(real_uid)) != NULL)
4678 originator_login = string_copy(US pw->pw_name);
4679 originator_home = string_copy(US pw->pw_dir);
4681 /* If user name has not been set by -F, set it from the passwd entry
4682 unless -f has been used to set the sender address by a trusted user. */
4684 if (!originator_name)
4686 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4688 uschar *name = US pw->pw_gecos;
4689 uschar *amp = Ustrchr(name, '&');
4692 /* Most Unix specify that a '&' character in the gecos field is
4693 replaced by a copy of the login name, and some even specify that
4694 the first character should be upper cased, so that's what we do. */
4699 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4700 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4701 buffer[loffset] = toupper(buffer[loffset]);
4705 /* If a pattern for matching the gecos field was supplied, apply
4706 it and then expand the name string. */
4708 if (gecos_pattern && gecos_name)
4711 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4713 if (regex_match_and_setup(re, name, 0, -1))
4715 uschar *new_name = expand_string(gecos_name);
4719 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4720 "gecos field \"%s\"\n", new_name, name);
4723 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4724 "\"%s\": %s\n", gecos_name, expand_string_message);
4726 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4727 "gecos field \"%s\"\n", gecos_pattern, name);
4728 store_free((void *)re);
4730 originator_name = string_copy(name);
4733 /* A trusted caller has used -f but not -F */
4735 else originator_name = US"";
4738 /* Break the retry loop */
4743 if (++i > finduser_retries) break;
4747 /* If we cannot get a user login, log the incident and give up, unless the
4748 configuration specifies something to use. When running in the test harness,
4749 any setting of unknown_login overrides the actual name. */
4751 if (originator_login == NULL || f.running_in_test_harness)
4753 if (unknown_login != NULL)
4755 originator_login = expand_string(unknown_login);
4756 if (originator_name == NULL && unknown_username != NULL)
4757 originator_name = expand_string(unknown_username);
4758 if (originator_name == NULL) originator_name = US"";
4760 if (originator_login == NULL)
4761 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4765 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4768 originator_name = string_copy(parse_fix_phrase(originator_name,
4769 Ustrlen(originator_name), big_buffer, big_buffer_size));
4771 /* If a message is created by this call of Exim, the uid/gid of its originator
4772 are those of the caller. These values are overridden if an existing message is
4773 read in from the spool. */
4775 originator_uid = real_uid;
4776 originator_gid = real_gid;
4778 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4779 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4781 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4782 returns. We leave this till here so that the originator_ fields are available
4783 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4786 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4790 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4791 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4792 "mua_wrapper is set");
4795 # ifndef DISABLE_TLS
4796 /* This also checks that the library linkage is working and we can call
4797 routines in it, so call even if tls_require_ciphers is unset */
4799 # ifdef MEASURE_TIMING
4800 struct timeval t0, diff;
4801 (void)gettimeofday(&t0, NULL);
4803 if (!tls_dropprivs_validate_require_cipher(FALSE))
4805 # ifdef MEASURE_TIMING
4806 report_time_since(&t0, US"validate_ciphers (delta)");
4814 /* If the sender ident has not been set (by a trusted caller) set it to
4815 the caller. This will get overwritten below for an inetd call. If a trusted
4816 caller has set it empty, unset it. */
4818 if (!sender_ident) sender_ident = originator_login;
4819 else if (!*sender_ident) sender_ident = NULL;
4821 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4822 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4823 originator_* variables set. */
4825 if (test_rewrite_arg >= 0)
4827 f.really_exim = FALSE;
4828 if (test_rewrite_arg >= argc)
4830 printf("-brw needs an address argument\n");
4831 exim_exit(EXIT_FAILURE);
4833 rewrite_test(argv[test_rewrite_arg]);
4834 exim_exit(EXIT_SUCCESS);
4837 /* A locally-supplied message is considered to be coming from a local user
4838 unless a trusted caller supplies a sender address with -f, or is passing in the
4839 message via SMTP (inetd invocation or otherwise). */
4841 if ( !sender_address && !smtp_input
4842 || !f.trusted_caller && filter_test == FTEST_NONE)
4844 f.sender_local = TRUE;
4846 /* A trusted caller can supply authenticated_sender and authenticated_id
4847 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4848 defaults except when host checking. */
4850 if (!authenticated_sender && !host_checking)
4851 authenticated_sender = string_sprintf("%s@%s", originator_login,
4852 qualify_domain_sender);
4853 if (!authenticated_id && !host_checking)
4854 authenticated_id = originator_login;
4857 /* Trusted callers are always permitted to specify the sender address.
4858 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4859 is specified is the empty address. However, if a trusted caller does not
4860 specify a sender address for SMTP input, we leave sender_address unset. This
4861 causes the MAIL commands to be honoured. */
4863 if ( !smtp_input && !sender_address
4864 || !receive_check_set_sender(sender_address))
4866 /* Either the caller is not permitted to set a general sender, or this is
4867 non-SMTP input and the trusted caller has not set a sender. If there is no
4868 sender, or if a sender other than <> is set, override with the originator's
4869 login (which will get qualified below), except when checking things. */
4871 if ( !sender_address /* No sender_address set */
4873 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4874 !checking)) /* Not running tests, including filter tests */
4876 sender_address = originator_login;
4877 f.sender_address_forced = FALSE;
4878 sender_address_domain = 0;
4882 /* Remember whether an untrusted caller set the sender address */
4884 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4886 /* Ensure that the sender address is fully qualified unless it is the empty
4887 address, which indicates an error message, or doesn't exist (root caller, smtp
4888 interface, no -f argument). */
4890 if (sender_address && *sender_address && sender_address_domain == 0)
4891 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4892 qualify_domain_sender);
4894 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4896 /* Handle a request to verify a list of addresses, or test them for delivery.
4897 This must follow the setting of the sender address, since routers can be
4898 predicated upon the sender. If no arguments are given, read addresses from
4899 stdin. Set debug_level to at least D_v to get full output for address testing.
4902 if (verify_address_mode || f.address_test_mode)
4905 int flags = vopt_qualify;
4907 if (verify_address_mode)
4909 if (!verify_as_sender) flags |= vopt_is_recipient;
4910 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4915 flags |= vopt_is_recipient;
4916 debug_selector |= D_v;
4917 debug_file = stderr;
4918 debug_fd = fileno(debug_file);
4919 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4922 if (recipients_arg < argc)
4923 while (recipients_arg < argc)
4925 /* Supplied addresses are tainted since they come from a user */
4926 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4929 BOOL finished = FALSE;
4930 uschar *ss = parse_find_address_end(s, FALSE);
4931 if (*ss == ',') *ss = 0; else finished = TRUE;
4932 test_address(s, flags, &exit_value);
4935 while (*++s == ',' || isspace(*s)) ;
4941 uschar * s = get_stdinput(NULL, NULL);
4943 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4947 exim_exit(exit_value);
4950 /* Handle expansion checking. Either expand items on the command line, or read
4951 from stdin if there aren't any. If -Mset was specified, load the message so
4952 that its variables can be used, but restrict this facility to admin users.
4953 Otherwise, if -bem was used, read a message from stdin. */
4957 dns_init(FALSE, FALSE, FALSE);
4958 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4960 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4962 exim_fail("exim: permission denied\n");
4963 message_id = argv[msg_action_arg];
4964 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4965 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4966 printf ("Failed to load message datafile %s\n", message_id);
4967 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4968 printf ("Failed to load message %s\n", message_id);
4971 /* Read a test message from a file. We fudge it up to be on stdin, saving
4972 stdin itself for later reading of expansion strings. */
4974 else if (expansion_test_message)
4976 int save_stdin = dup(0);
4977 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4979 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4982 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4983 message_ended = END_NOTENDED;
4984 read_message_body(receive_msg(extract_recipients));
4985 message_linecount += body_linecount;
4986 (void)dup2(save_stdin, 0);
4987 (void)close(save_stdin);
4988 clearerr(stdin); /* Required by Darwin */
4991 /* Only admin users may see config-file macros this way */
4993 if (!f.admin_user) macros_user = macros = mlast = NULL;
4995 /* Allow $recipients for this testing */
4997 f.enable_dollar_recipients = TRUE;
4999 /* Expand command line items */
5001 if (recipients_arg < argc)
5002 while (recipients_arg < argc)
5003 expansion_test_line(argv[recipients_arg++]);
5009 char *(*fn_readline)(const char *) = NULL;
5010 void (*fn_addhist)(const char *) = NULL;
5014 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5017 while (s = get_stdinput(fn_readline, fn_addhist))
5018 expansion_test_line(s);
5021 if (dlhandle) dlclose(dlhandle);
5025 /* The data file will be open after -Mset */
5027 if (deliver_datafile >= 0)
5029 (void)close(deliver_datafile);
5030 deliver_datafile = -1;
5033 exim_exit(EXIT_SUCCESS);
5037 /* The active host name is normally the primary host name, but it can be varied
5038 for hosts that want to play several parts at once. We need to ensure that it is
5039 set for host checking, and for receiving messages. */
5041 smtp_active_hostname = primary_hostname;
5042 if (raw_active_hostname != NULL)
5044 uschar *nah = expand_string(raw_active_hostname);
5047 if (!f.expand_string_forcedfail)
5048 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5049 "(smtp_active_hostname): %s", raw_active_hostname,
5050 expand_string_message);
5052 else if (nah[0] != 0) smtp_active_hostname = nah;
5055 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5056 given IP address so that the blocking and relay configuration can be tested.
5057 Unless a sender_ident was set by -oMt, we discard it (the default is the
5058 caller's login name). An RFC 1413 call is made only if we are running in the
5059 test harness and an incoming interface and both ports are specified, because
5060 there is no TCP/IP call to find the ident for. */
5067 if (!sender_ident_set)
5069 sender_ident = NULL;
5070 if (f.running_in_test_harness && sender_host_port
5071 && interface_address && interface_port)
5072 verify_get_ident(1223); /* note hardwired port number */
5075 /* In case the given address is a non-canonical IPv6 address, canonicalize
5076 it. The code works for both IPv4 and IPv6, as it happens. */
5078 size = host_aton(sender_host_address, x);
5079 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5080 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5082 /* Now set up for testing */
5084 host_build_sender_fullhost();
5088 f.sender_local = FALSE;
5089 f.sender_host_notsocket = TRUE;
5090 debug_file = stderr;
5091 debug_fd = fileno(debug_file);
5092 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5093 "**** but without any ident (RFC 1413) callback.\n"
5094 "**** This is not for real!\n\n",
5095 sender_host_address);
5097 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5098 if (verify_check_host(&hosts_connection_nolog) == OK)
5099 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5100 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5102 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5103 because a log line has already been written for all its failure exists
5104 (usually "connection refused: <reason>") and writing another one is
5105 unnecessary clutter. */
5107 if (smtp_start_session())
5110 for (; (reset_point = store_mark()); store_reset(reset_point))
5112 if (smtp_setup_msg() <= 0) break;
5113 if (!receive_msg(FALSE)) break;
5115 return_path = sender_address = NULL;
5116 dnslist_domain = dnslist_matched = NULL;
5117 #ifndef DISABLE_DKIM
5118 dkim_cur_signer = NULL;
5121 deliver_localpart_orig = NULL;
5122 deliver_domain_orig = NULL;
5123 callout_address = sending_ip_address = NULL;
5124 deliver_localpart_data = deliver_domain_data =
5125 recipient_data = sender_data = NULL;
5126 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5130 exim_exit(EXIT_SUCCESS);
5134 /* Arrange for message reception if recipients or SMTP were specified;
5135 otherwise complain unless a version print (-bV) happened or this is a filter
5136 verification test or info dump.
5137 In the former case, show the configuration file name. */
5139 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5141 if (version_printed)
5143 if (Ustrchr(config_main_filelist, ':'))
5144 printf("Configuration file search path is %s\n", config_main_filelist);
5145 printf("Configuration file is %s\n", config_main_filename);
5146 return EXIT_SUCCESS;
5149 if (info_flag != CMDINFO_NONE)
5151 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5152 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5155 if (filter_test == FTEST_NONE)
5156 exim_usage(called_as);
5160 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5161 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5162 that we are not called from inetd, because that is rejected above. The
5163 following configuration settings are forced here:
5165 (1) Synchronous delivery (-odi)
5166 (2) Errors to stderr (-oep == -oeq)
5167 (3) No parallel remote delivery
5168 (4) Unprivileged delivery
5170 We don't force overall queueing options because there are several of them;
5171 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5172 to override any SMTP queueing. */
5176 f.synchronous_delivery = TRUE;
5177 arg_error_handling = ERRORS_STDERR;
5178 remote_max_parallel = 1;
5179 deliver_drop_privilege = TRUE;
5180 f.queue_smtp = FALSE;
5181 queue_smtp_domains = NULL;
5183 message_utf8_downconvert = -1; /* convert-if-needed */
5188 /* Prepare to accept one or more new messages on the standard input. When a
5189 message has been read, its id is returned in message_id[]. If doing immediate
5190 delivery, we fork a delivery process for each received message, except for the
5191 last one, where we can save a process switch.
5193 It is only in non-smtp mode that error_handling is allowed to be changed from
5194 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5195 sendmail error modes other than -oem ever actually used? Later: yes.) */
5197 if (!smtp_input) error_handling = arg_error_handling;
5199 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5200 logging being sent down the socket and make an identd call to get the
5203 else if (f.is_inetd)
5205 (void)fclose(stderr);
5206 exim_nullstd(); /* Re-open to /dev/null */
5207 verify_get_ident(IDENT_PORT);
5208 host_build_sender_fullhost();
5209 set_process_info("handling incoming connection from %s via inetd",
5213 /* If the sender host address has been set, build sender_fullhost if it hasn't
5214 already been done (which it will have been for inetd). This caters for the
5215 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5216 so that the test for IP options is skipped for -bs input. */
5218 if (sender_host_address && !sender_fullhost)
5220 host_build_sender_fullhost();
5221 set_process_info("handling incoming connection from %s via -oMa",
5223 f.sender_host_notsocket = TRUE;
5226 /* Otherwise, set the sender host as unknown except for inetd calls. This
5227 prevents host checking in the case of -bs not from inetd and also for -bS. */
5229 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5231 /* If stdout does not exist, then dup stdin to stdout. This can happen
5232 if exim is started from inetd. In this case fd 0 will be set to the socket,
5233 but fd 1 will not be set. This also happens for passed SMTP channels. */
5235 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5237 /* Set up the incoming protocol name and the state of the program. Root is
5238 allowed to force received protocol via the -oMr option above. If we have come
5239 via inetd, the process info has already been set up. We don't set
5240 received_protocol here for smtp input, as it varies according to
5241 batch/HELO/EHLO/AUTH/TLS. */
5245 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5246 smtp_batched_input? "batched " : "",
5247 (sender_address!= NULL)? sender_address : originator_login);
5251 int old_pool = store_pool;
5252 store_pool = POOL_PERM;
5253 if (!received_protocol)
5254 received_protocol = string_sprintf("local%s", called_as);
5255 store_pool = old_pool;
5256 set_process_info("accepting a local non-SMTP message from <%s>",
5260 /* Initialize the session_local_queue-only flag (this will be ignored if
5261 mua_wrapper is set) */
5264 session_local_queue_only = queue_only;
5266 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5267 the spool if so configured. On failure, we must not attempt to send an error
5268 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5269 error code is given.) */
5271 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5272 exim_fail("exim: insufficient disk space\n");
5274 /* If this is smtp input of any kind, real or batched, handle the start of the
5277 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5278 because a log line has already been written for all its failure exists
5279 (usually "connection refused: <reason>") and writing another one is
5280 unnecessary clutter. */
5286 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5287 if (verify_check_host(&hosts_connection_nolog) == OK)
5288 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5289 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5290 if (!smtp_start_session())
5293 exim_exit(EXIT_SUCCESS);
5297 /* Otherwise, set up the input size limit here. */
5301 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5302 if (expand_string_message)
5303 if (thismessage_size_limit == -1)
5304 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5305 "message_size_limit: %s", expand_string_message);
5307 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5308 "message_size_limit: %s", expand_string_message);
5311 /* Loop for several messages when reading SMTP input. If we fork any child
5312 processes, we don't want to wait for them unless synchronous delivery is
5313 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5314 same as SIG_DFL, despite the fact that documentation often lists the default as
5315 "ignore". This is a confusing area. This is what I know:
5317 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5318 processes that complete simply to go away without ever becoming defunct. You
5319 can't then wait for them - but we don't want to wait for them in the
5320 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5321 happen for all OS (e.g. *BSD is different).
5323 But that's not the end of the story. Some (many? all?) systems have the
5324 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5325 has by default, so it seems that the difference is merely one of default
5326 (compare restarting vs non-restarting signals).
5328 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5329 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5330 of the loop below. Paranoia rules.
5332 February 2003: That's *still* not the end of the story. There are now versions
5333 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5334 process then calls waitpid(), a grumble is written to the system log, because
5335 this is logically inconsistent. In other words, it doesn't like the paranoia.
5336 As a consequence of this, the waitpid() below is now excluded if we are sure
5337 that SIG_IGN works. */
5339 if (!f.synchronous_delivery)
5342 struct sigaction act;
5343 act.sa_handler = SIG_IGN;
5344 sigemptyset(&(act.sa_mask));
5345 act.sa_flags = SA_NOCLDWAIT;
5346 sigaction(SIGCHLD, &act, NULL);
5348 signal(SIGCHLD, SIG_IGN);
5352 /* Save the current store pool point, for resetting at the start of
5353 each message, and save the real sender address, if any. */
5355 real_sender_address = sender_address;
5357 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5358 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5363 rmark reset_point = store_mark();
5366 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5367 input and build the recipients list, before calling receive_msg() to read the
5368 message proper. Whatever sender address is given in the SMTP transaction is
5369 often ignored for local senders - we use the actual sender, which is normally
5370 either the underlying user running this process or a -f argument provided by
5371 a trusted caller. It is saved in real_sender_address. The test for whether to
5372 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5377 if ((rc = smtp_setup_msg()) > 0)
5379 if (real_sender_address != NULL &&
5380 !receive_check_set_sender(sender_address))
5382 sender_address = raw_sender = real_sender_address;
5383 sender_address_unrewritten = NULL;
5386 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5387 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5388 the very end. The result of the ACL is ignored (as for other non-SMTP
5389 messages). It is run for its potential side effects. */
5391 if (smtp_batched_input && acl_not_smtp_start != NULL)
5393 uschar *user_msg, *log_msg;
5394 f.enable_dollar_recipients = TRUE;
5395 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5396 &user_msg, &log_msg);
5397 f.enable_dollar_recipients = FALSE;
5400 /* Now get the data for the message */
5402 more = receive_msg(extract_recipients);
5403 if (message_id[0] == 0)
5405 cancel_cutthrough_connection(TRUE, US"receive dropped");
5406 if (more) goto moreloop;
5407 smtp_log_no_mail(); /* Log no mail if configured */
5408 exim_exit(EXIT_FAILURE);
5413 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5414 smtp_log_no_mail(); /* Log no mail if configured */
5415 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5419 /* In the non-SMTP case, we have all the information from the command
5420 line, but must process it in case it is in the more general RFC822
5421 format, and in any case, to detect syntax errors. Also, it appears that
5422 the use of comma-separated lists as single arguments is common, so we
5423 had better support them. */
5428 int count = argc - recipients_arg;
5429 uschar **list = argv + recipients_arg;
5431 /* These options cannot be changed dynamically for non-SMTP messages */
5433 f.active_local_sender_retain = local_sender_retain;
5434 f.active_local_from_check = local_from_check;
5436 /* Save before any rewriting */
5438 raw_sender = string_copy(sender_address);
5440 /* Loop for each argument (supplied by user hence tainted) */
5442 for (int i = 0; i < count; i++)
5444 int start, end, domain;
5446 uschar * s = string_copy_taint(list[i], TRUE);
5448 /* Loop for each comma-separated address */
5452 BOOL finished = FALSE;
5454 uschar *ss = parse_find_address_end(s, FALSE);
5456 if (*ss == ',') *ss = 0; else finished = TRUE;
5458 /* Check max recipients - if -t was used, these aren't recipients */
5460 if (recipients_max > 0 && ++rcount > recipients_max &&
5461 !extract_recipients)
5462 if (error_handling == ERRORS_STDERR)
5464 fprintf(stderr, "exim: too many recipients\n");
5465 exim_exit(EXIT_FAILURE);
5469 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5470 errors_sender_rc : EXIT_FAILURE;
5474 BOOL b = allow_utf8_domains;
5475 allow_utf8_domains = TRUE;
5478 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5481 if (string_is_utf8(recipient))
5482 message_smtputf8 = TRUE;
5484 allow_utf8_domains = b;
5487 if (domain == 0 && !f.allow_unqualified_recipient)
5490 errmess = US"unqualified recipient address not allowed";
5494 if (error_handling == ERRORS_STDERR)
5496 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5497 string_printing(list[i]), errmess);
5498 exim_exit(EXIT_FAILURE);
5504 eblock.text1 = string_printing(list[i]);
5505 eblock.text2 = errmess;
5507 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5508 errors_sender_rc : EXIT_FAILURE;
5511 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5514 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5518 /* Show the recipients when debugging */
5522 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5523 if (recipients_list)
5525 debug_printf("Recipients:\n");
5526 for (int i = 0; i < recipients_count; i++)
5527 debug_printf(" %s\n", recipients_list[i].address);
5531 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5532 ignored; rejecting here would just add complication, and it can just as
5533 well be done later. Allow $recipients to be visible in the ACL. */
5535 if (acl_not_smtp_start)
5537 uschar *user_msg, *log_msg;
5538 f.enable_dollar_recipients = TRUE;
5539 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5540 &user_msg, &log_msg);
5541 f.enable_dollar_recipients = FALSE;
5544 /* Pause for a while waiting for input. If none received in that time,
5545 close the logfile, if we had one open; then if we wait for a long-running
5546 datasource (months, in one use-case) log rotation will not leave us holding
5549 if (!receive_timeout)
5551 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5554 FD_ZERO(&r); FD_SET(0, &r);
5555 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5558 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5559 will just read the headers for the message, and not write anything onto the
5562 message_ended = END_NOTENDED;
5563 more = receive_msg(extract_recipients);
5565 /* more is always FALSE here (not SMTP message) when reading a message
5566 for real; when reading the headers of a message for filter testing,
5567 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5569 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5570 } /* Non-SMTP message reception */
5572 /* If this is a filter testing run, there are headers in store, but
5573 no message on the spool. Run the filtering code in testing mode, setting
5574 the domain to the qualify domain and the local part to the current user,
5575 unless they have been set by options. The prefix and suffix are left unset
5576 unless specified. The the return path is set to to the sender unless it has
5577 already been set from a return-path header in the message. */
5579 if (filter_test != FTEST_NONE)
5581 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5582 deliver_domain_orig = deliver_domain;
5583 deliver_localpart = ftest_localpart ? ftest_localpart : originator_login;
5584 deliver_localpart_orig = deliver_localpart;
5585 deliver_localpart_prefix = ftest_prefix;
5586 deliver_localpart_suffix = ftest_suffix;
5587 deliver_home = originator_home;
5591 printf("Return-path copied from sender\n");
5592 return_path = string_copy(sender_address);
5595 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5596 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5598 receive_add_recipient(
5599 string_sprintf("%s%s%s@%s",
5600 ftest_prefix ? ftest_prefix : US"",
5602 ftest_suffix ? ftest_suffix : US"",
5603 deliver_domain), -1);
5605 printf("Recipient = %s\n", recipients_list[0].address);
5606 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5607 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5609 if (chdir("/")) /* Get away from wherever the user is running this from */
5611 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5612 exim_exit(EXIT_FAILURE);
5615 /* Now we run either a system filter test, or a user filter test, or both.
5616 In the latter case, headers added by the system filter will persist and be
5617 available to the user filter. We need to copy the filter variables
5620 if (filter_test & FTEST_SYSTEM)
5621 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5622 exim_exit(EXIT_FAILURE);
5624 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5626 if (filter_test & FTEST_USER)
5627 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5628 exim_exit(EXIT_FAILURE);
5630 exim_exit(EXIT_SUCCESS);
5633 /* Else act on the result of message reception. We should not get here unless
5634 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5635 will be TRUE. If it is not, check on the number of messages received in this
5638 if ( !session_local_queue_only
5639 && smtp_accept_queue_per_connection > 0
5640 && receive_messagecount > smtp_accept_queue_per_connection)
5642 session_local_queue_only = TRUE;
5643 queue_only_reason = 2;
5646 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5647 and queue_only_load is set, check that the load average is below it. If it is
5648 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5649 default), we put the whole session into queue_only mode. It then remains this
5650 way for any subsequent messages on the same SMTP connection. This is a
5651 deliberate choice; even though the load average may fall, it doesn't seem
5652 right to deliver later messages on the same call when not delivering earlier
5653 ones. However, there are odd cases where this is not wanted, so this can be
5654 changed by setting queue_only_load_latch false. */
5656 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5657 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5659 queue_only_reason = 3;
5660 if (queue_only_load_latch) session_local_queue_only = TRUE;
5663 /* If running as an MUA wrapper, all queueing options and freezing options
5667 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5669 /* Log the queueing here, when it will get a message id attached, but
5670 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5673 if (local_queue_only)
5675 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5676 switch(queue_only_reason)
5679 log_write(L_delay_delivery,
5680 LOG_MAIN, "no immediate delivery: more than %d messages "
5681 "received in one connection", smtp_accept_queue_per_connection);
5685 log_write(L_delay_delivery,
5686 LOG_MAIN, "no immediate delivery: load average %.2f",
5687 (double)load_average/1000.0);
5692 else if (f.queue_only_policy || f.deliver_freeze)
5693 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5695 /* Else do the delivery unless the ACL or local_scan() called for queue only
5696 or froze the message. Always deliver in a separate process. A fork failure is
5697 not a disaster, as the delivery will eventually happen on a subsequent queue
5698 run. The search cache must be tidied before the fork, as the parent will
5699 do it before exiting. The child will trigger a lookup failure and
5700 thereby defer the delivery if it tries to use (for example) a cached ldap
5701 connection that the parent has called unbind on. */
5708 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5711 close_unwanted(); /* Close unwanted file descriptors and TLS */
5712 exim_nullstd(); /* Ensure std{in,out,err} exist */
5714 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5715 mode, deliver_drop_privilege is forced TRUE). */
5717 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5719 delivery_re_exec(CEE_EXEC_EXIT);
5720 /* Control does not return here. */
5723 /* No need to re-exec */
5725 rc = deliver_message(message_id, FALSE, FALSE);
5727 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5728 ? EXIT_SUCCESS : EXIT_FAILURE);
5733 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5734 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5735 "process: %s", strerror(errno));
5739 release_cutthrough_connection(US"msg passed for delivery");
5741 /* In the parent, wait if synchronous delivery is required. This will
5742 always be the case in MUA wrapper mode. */
5744 if (f.synchronous_delivery)
5747 while (wait(&status) != pid);
5748 if ((status & 0x00ff) != 0)
5749 log_write(0, LOG_MAIN|LOG_PANIC,
5750 "process %d crashed with signal %d while delivering %s",
5751 (int)pid, status & 0x00ff, message_id);
5752 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5757 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5758 automatically reaps children (see comments above the loop), clear away any
5759 finished subprocesses here, in case there are lots of messages coming in
5760 from the same source. */
5762 #ifndef SIG_IGN_WORKS
5763 while (waitpid(-1, NULL, WNOHANG) > 0);
5767 return_path = sender_address = NULL;
5768 authenticated_sender = NULL;
5769 deliver_localpart_orig = NULL;
5770 deliver_domain_orig = NULL;
5771 deliver_host = deliver_host_address = NULL;
5772 dnslist_domain = dnslist_matched = NULL;
5773 #ifdef WITH_CONTENT_SCAN
5774 malware_name = NULL;
5776 callout_address = NULL;
5777 sending_ip_address = NULL;
5778 deliver_localpart_data = deliver_domain_data =
5779 recipient_data = sender_data = NULL;
5781 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5783 store_reset(reset_point);
5786 exim_exit(EXIT_SUCCESS); /* Never returns */
5787 return 0; /* To stop compiler warning */