1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
30 extern void init_lookup_list(void);
34 /*************************************************
35 * Function interface to store functions *
36 *************************************************/
38 /* We need some real functions to pass to the PCRE regular expression library
39 for store allocation via Exim's store manager. The normal calls are actually
40 macros that pass over location information to make tracing easier. These
41 functions just interface to the standard macro calls. A good compiler will
42 optimize out the tail recursion and so not make them too expensive. There
43 are two sets of functions; one for use when we want to retain the compiled
44 regular expression for a long time; the other for short-term use. */
47 function_store_get(size_t size)
49 /* For now, regard all RE results as potentially tainted. We might need
50 more intelligence on this point. */
51 return store_get((int)size, TRUE);
55 function_dummy_free(void *block) { block = block; }
58 function_store_malloc(size_t size)
60 return store_malloc((int)size);
64 function_store_free(void *block)
72 /*************************************************
73 * Enums for cmdline interface *
74 *************************************************/
76 enum commandline_info { CMDINFO_NONE=0,
77 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
82 /*************************************************
83 * Compile regular expression and panic on fail *
84 *************************************************/
86 /* This function is called when failure to compile a regular expression leads
87 to a panic exit. In other cases, pcre_compile() is called directly. In many
88 cases where this function is used, the results of the compilation are to be
89 placed in long-lived store, so we temporarily reset the store management
90 functions that PCRE uses if the use_malloc flag is set.
93 pattern the pattern to compile
94 caseless TRUE if caseless matching is required
95 use_malloc TRUE if compile into malloc store
97 Returns: pointer to the compiled pattern
101 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
104 int options = PCRE_COPT;
109 pcre_malloc = function_store_malloc;
110 pcre_free = function_store_free;
112 if (caseless) options |= PCRE_CASELESS;
113 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
114 pcre_malloc = function_store_get;
115 pcre_free = function_dummy_free;
117 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
118 "%s at offset %d while compiling %s", error, offset, pattern);
125 /*************************************************
126 * Execute regular expression and set strings *
127 *************************************************/
129 /* This function runs a regular expression match, and sets up the pointers to
130 the matched substrings.
133 re the compiled expression
134 subject the subject string
135 options additional PCRE options
136 setup if < 0 do full setup
137 if >= 0 setup from setup+1 onwards,
138 excluding the full matched string
140 Returns: TRUE or FALSE
144 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
146 int ovector[3*(EXPAND_MAXN+1)];
147 uschar * s = string_copy(subject); /* de-constifying */
148 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
149 PCRE_EOPT | options, ovector, nelem(ovector));
151 if (n == 0) n = EXPAND_MAXN + 1;
154 expand_nmax = setup < 0 ? 0 : setup + 1;
155 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
157 expand_nstring[expand_nmax] = s + ovector[nn];
158 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
168 /*************************************************
169 * Set up processing details *
170 *************************************************/
172 /* Save a text string for dumping when SIGUSR1 is received.
173 Do checks for overruns.
175 Arguments: format and arguments, as for printf()
180 set_process_info(const char *format, ...)
182 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
187 g = string_fmt_append(&gs, "%5d ", (int)getpid());
189 va_start(ap, format);
190 if (!string_vformat(g, 0, format, ap))
193 g = string_cat(&gs, US"**** string overflowed buffer ****");
195 g = string_catn(g, US"\n", 1);
196 string_from_gstring(g);
197 process_info_len = g->ptr;
198 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
202 /***********************************************
203 * Handler for SIGTERM *
204 ***********************************************/
207 term_handler(int sig)
213 /*************************************************
214 * Handler for SIGUSR1 *
215 *************************************************/
217 /* SIGUSR1 causes any exim process to write to the process log details of
218 what it is currently doing. It will only be used if the OS is capable of
219 setting up a handler that causes automatic restarting of any system call
220 that is in progress at the time.
222 This function takes care to be signal-safe.
224 Argument: the signal number (SIGUSR1)
229 usr1_handler(int sig)
233 os_restarting_signal(sig, usr1_handler);
235 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
237 /* If we are already running as the Exim user, try to create it in the
238 current process (assuming spool_directory exists). Otherwise, if we are
239 root, do the creation in an exim:exim subprocess. */
241 int euid = geteuid();
242 if (euid == exim_uid)
243 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
244 else if (euid == root_uid)
245 fd = log_create_as_exim(process_log_path);
248 /* If we are neither exim nor root, or if we failed to create the log file,
249 give up. There is not much useful we can do with errors, since we don't want
250 to disrupt whatever is going on outside the signal handler. */
254 (void)write(fd, process_info, process_info_len);
260 /*************************************************
262 *************************************************/
264 /* This handler is enabled most of the time that Exim is running. The handler
265 doesn't actually get used unless alarm() has been called to set a timer, to
266 place a time limit on a system call of some kind. When the handler is run, it
269 There are some other SIGALRM handlers that are used in special cases when more
270 than just a flag setting is required; for example, when reading a message's
271 input. These are normally set up in the code module that uses them, and the
272 SIGALRM handler is reset to this one afterwards.
274 Argument: the signal value (SIGALRM)
279 sigalrm_handler(int sig)
281 sig = sig; /* Keep picky compilers happy */
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 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
934 g = string_cat(g, US" translate_ip_address");
936 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
937 g = string_cat(g, US" move_frozen_messages");
939 #ifdef WITH_CONTENT_SCAN
940 g = string_cat(g, US" Content_Scanning");
943 g = string_cat(g, US" DANE");
946 g = string_cat(g, US" DKIM");
948 #ifndef DISABLE_DNSSEC
949 g = string_cat(g, US" DNSSEC");
951 #ifndef DISABLE_EVENT
952 g = string_cat(g, US" Event");
955 g = string_cat(g, US" I18N");
958 g = string_cat(g, US" OCSP");
960 #ifndef DISABLE_PIPE_CONNECT
961 g = string_cat(g, US" PIPE_CONNECT");
964 g = string_cat(g, US" PRDR");
967 g = string_cat(g, US" PROXY");
970 g = string_cat(g, US" SOCKS");
973 g = string_cat(g, US" SPF");
976 g = string_cat(g, US" DMARC");
980 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
982 #ifdef EXPERIMENTAL_ARC
983 g = string_cat(g, US" Experimental_ARC");
985 #ifdef EXPERIMENTAL_BRIGHTMAIL
986 g = string_cat(g, US" Experimental_Brightmail");
988 #ifdef EXPERIMENTAL_DCC
989 g = string_cat(g, US" Experimental_DCC");
991 #ifdef EXPERIMENTAL_DSN_INFO
992 g = string_cat(g, US" Experimental_DSN_info");
994 #ifdef EXPERIMENTAL_LMDB
995 g = string_cat(g, US" Experimental_LMDB");
997 #ifdef EXPERIMENTAL_QUEUE_RAMP
998 g = string_cat(g, US" Experimental_Queue_Ramp");
1000 #ifdef EXPERIMENTAL_QUEUEFILE
1001 g = string_cat(g, US" Experimental_QUEUEFILE");
1003 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
1004 g = string_cat(g, US" Experimental_SRS");
1006 #ifdef EXPERIMENTAL_TLS_RESUME
1007 g = string_cat(g, US" Experimental_TLS_resume");
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");
1036 #ifdef EXPERIMENTAL_LMDB
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 version_printed = FALSE;
1621 uschar *alias_arg = NULL;
1622 uschar *called_as = US"";
1623 uschar *cmdline_syslog_name = NULL;
1624 uschar *start_queue_run_id = NULL;
1625 uschar *stop_queue_run_id = NULL;
1626 uschar *expansion_test_message = NULL;
1627 uschar *ftest_domain = NULL;
1628 uschar *ftest_localpart = NULL;
1629 uschar *ftest_prefix = NULL;
1630 uschar *ftest_suffix = NULL;
1631 uschar *log_oneline = NULL;
1632 uschar *malware_test_file = NULL;
1633 uschar *real_sender_address;
1634 uschar *originator_home = US"/";
1638 struct stat statbuf;
1639 pid_t passed_qr_pid = (pid_t)0;
1640 int passed_qr_pipe = -1;
1641 gid_t group_list[EXIM_GROUPLIST_SIZE];
1643 /* For the -bI: flag */
1644 enum commandline_info info_flag = CMDINFO_NONE;
1645 BOOL info_stdout = FALSE;
1647 /* Possible options for -R and -S */
1649 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1651 /* Need to define this in case we need to change the environment in order
1652 to get rid of a bogus time zone. We have to make it char rather than uschar
1653 because some OS define it in /usr/include/unistd.h. */
1655 extern char **environ;
1657 #ifdef MEASURE_TIMING
1658 (void)gettimeofday(×tamp_startup, NULL);
1661 /* If the Exim user and/or group and/or the configuration file owner/group were
1662 defined by ref:name at build time, we must now find the actual uid/gid values.
1663 This is a feature to make the lives of binary distributors easier. */
1665 #ifdef EXIM_USERNAME
1666 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1669 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1671 /* If ref:name uses a number as the name, route_finduser() returns
1672 TRUE with exim_uid set and pw coerced to NULL. */
1674 exim_gid = pw->pw_gid;
1675 #ifndef EXIM_GROUPNAME
1678 "exim: ref:name should specify a usercode, not a group.\n"
1679 "exim: can't let you get away with it unless you also specify a group.\n");
1683 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1686 #ifdef EXIM_GROUPNAME
1687 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1688 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1691 #ifdef CONFIGURE_OWNERNAME
1692 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1693 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1694 CONFIGURE_OWNERNAME);
1697 /* We default the system_filter_user to be the Exim run-time user, as a
1698 sane non-root value. */
1699 system_filter_uid = exim_uid;
1701 #ifdef CONFIGURE_GROUPNAME
1702 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1703 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1704 CONFIGURE_GROUPNAME);
1707 /* In the Cygwin environment, some initialization used to need doing.
1708 It was fudged in by means of this macro; now no longer but we'll leave
1709 it in case of others. */
1715 /* Check a field which is patched when we are running Exim within its
1716 testing harness; do a fast initial check, and then the whole thing. */
1718 f.running_in_test_harness =
1719 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1720 if (f.running_in_test_harness)
1723 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1724 at the start of a program; however, it seems that some environments do not
1725 follow this. A "strange" locale can affect the formatting of timestamps, so we
1728 setlocale(LC_ALL, "C");
1730 /* Get the offset between CLOCK_MONOTONIC and wallclock */
1732 #ifdef _POSIX_MONOTONIC_CLOCK
1736 /* Set up the default handler for timing using alarm(). */
1738 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1740 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1741 because store_malloc writes a log entry on failure. */
1743 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1744 exim_fail("exim: failed to get store for log buffer\n");
1746 /* Initialize the default log options. */
1748 bits_set(log_selector, log_selector_size, log_default);
1750 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1751 NULL when the daemon is run and the file is closed. We have to use this
1752 indirection, because some systems don't allow writing to the variable "stderr".
1755 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1757 /* Arrange for the PCRE regex library to use our store functions. Note that
1758 the normal calls are actually macros that add additional arguments for
1759 debugging purposes so we have to assign specially constructed functions here.
1760 The default is to use store in the stacking pool, but this is overridden in the
1761 regex_must_compile() function. */
1763 pcre_malloc = function_store_get;
1764 pcre_free = function_dummy_free;
1766 /* Ensure there is a big buffer for temporary use in several places. It is put
1767 in malloc store so that it can be freed for enlargement if necessary. */
1769 big_buffer = store_malloc(big_buffer_size);
1771 /* Set up the handler for the data request signal, and set the initial
1772 descriptive text. */
1774 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1775 set_process_info("initializing");
1776 os_restarting_signal(SIGUSR1, usr1_handler);
1778 /* If running in a dockerized environment, the TERM signal is only
1779 delegated to the PID 1 if we request it by setting an signal handler */
1780 if (getpid() == 1) signal(SIGTERM, term_handler);
1782 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1783 in the daemon code. For the rest of Exim's uses, we ignore it. */
1785 signal(SIGHUP, SIG_IGN);
1787 /* We don't want to die on pipe errors as the code is written to handle
1788 the write error instead. */
1790 signal(SIGPIPE, SIG_IGN);
1792 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1793 set to SIG_IGN. This causes subprocesses that complete before the parent
1794 process waits for them not to hang around, so when Exim calls wait(), nothing
1795 is there. The wait() code has been made robust against this, but let's ensure
1796 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1797 ending status. We use sigaction rather than plain signal() on those OS where
1798 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1799 problem on AIX with this.) */
1803 struct sigaction act;
1804 act.sa_handler = SIG_DFL;
1805 sigemptyset(&(act.sa_mask));
1807 sigaction(SIGCHLD, &act, NULL);
1810 signal(SIGCHLD, SIG_DFL);
1813 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1818 /* Set up the version number. Set up the leading 'E' for the external form of
1819 message ids, set the pointer to the internal form, and initialize it to
1820 indicate no message being processed. */
1823 message_id_option[0] = '-';
1824 message_id_external = message_id_option + 1;
1825 message_id_external[0] = 'E';
1826 message_id = message_id_external + 1;
1829 /* Set the umask to zero so that any files Exim creates using open() are
1830 created with the modes that it specifies. NOTE: Files created with fopen() have
1831 a problem, which was not recognized till rather late (February 2006). With this
1832 umask, such files will be world writeable. (They are all content scanning files
1833 in the spool directory, which isn't world-accessible, so this is not a
1834 disaster, but it's untidy.) I don't want to change this overall setting,
1835 however, because it will interact badly with the open() calls. Instead, there's
1836 now a function called modefopen() that fiddles with the umask while calling
1841 /* Precompile the regular expression for matching a message id. Keep this in
1842 step with the code that generates ids in the accept.c module. We need to do
1843 this here, because the -M options check their arguments for syntactic validity
1844 using mac_ismsgid, which uses this. */
1847 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1849 /* Precompile the regular expression that is used for matching an SMTP error
1850 code, possibly extended, at the start of an error message. Note that the
1851 terminating whitespace character is included. */
1854 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1857 #ifdef WHITELIST_D_MACROS
1858 /* Precompile the regular expression used to filter the content of macros
1859 given to -D for permissibility. */
1861 regex_whitelisted_macro =
1862 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1865 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1867 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1868 this seems to be a generally accepted convention, since one finds symbolic
1869 links called "mailq" in standard OS configurations. */
1871 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1872 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1875 receiving_message = FALSE;
1876 called_as = US"-mailq";
1879 /* If the program is called as "rmail" treat it as equivalent to
1880 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1881 i.e. preventing a single dot on a line from terminating the message, and
1882 returning with zero return code, even in cases of error (provided an error
1883 message has been sent). */
1885 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1886 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1889 called_as = US"-rmail";
1890 errors_sender_rc = EXIT_SUCCESS;
1893 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1894 this is a smail convention. */
1896 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1897 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1899 smtp_input = smtp_batched_input = TRUE;
1900 called_as = US"-rsmtp";
1903 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1904 this is a smail convention. */
1906 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1907 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1910 receiving_message = FALSE;
1911 called_as = US"-runq";
1914 /* If the program is called as "newaliases" treat it as equivalent to
1915 "exim -bi"; this is a sendmail convention. */
1917 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1918 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1921 receiving_message = FALSE;
1922 called_as = US"-newaliases";
1925 /* Save the original effective uid for a couple of uses later. It should
1926 normally be root, but in some esoteric environments it may not be. */
1928 original_euid = geteuid();
1929 original_egid = getegid();
1931 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1932 to be the same as the real ones. This makes a difference only if Exim is setuid
1933 (or setgid) to something other than root, which could be the case in some
1934 special configurations. */
1936 real_uid = getuid();
1937 real_gid = getgid();
1939 if (real_uid == root_uid)
1941 if ((rv = setgid(real_gid)))
1942 exim_fail("exim: setgid(%ld) failed: %s\n",
1943 (long int)real_gid, strerror(errno));
1944 if ((rv = setuid(real_uid)))
1945 exim_fail("exim: setuid(%ld) failed: %s\n",
1946 (long int)real_uid, strerror(errno));
1949 /* If neither the original real uid nor the original euid was root, Exim is
1950 running in an unprivileged state. */
1952 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1954 /* For most of the args-parsing we need to use permanent pool memory */
1956 int old_pool = store_pool;
1957 store_pool = POOL_PERM;
1959 /* Scan the program's arguments. Some can be dealt with right away; others are
1960 simply recorded for checking and handling afterwards. Do a high-level switch
1961 on the second character (the one after '-'), to save some effort. */
1963 for (i = 1; i < argc; i++)
1965 BOOL badarg = FALSE;
1966 uschar * arg = argv[i];
1970 /* An argument not starting with '-' is the start of a recipients list;
1971 break out of the options-scanning loop. */
1979 /* An option consisting of -- terminates the options */
1981 if (Ustrcmp(arg, "--") == 0)
1983 recipients_arg = i + 1;
1987 /* Handle flagged options */
1989 switchchar = arg[1];
1992 /* Make all -ex options synonymous with -oex arguments, since that
1993 is assumed by various callers. Also make -qR options synonymous with -R
1994 options, as that seems to be required as well. Allow for -qqR too, and
1995 the same for -S options. */
1997 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1998 Ustrncmp(arg+1, "qR", 2) == 0 ||
1999 Ustrncmp(arg+1, "qS", 2) == 0)
2001 switchchar = arg[2];
2004 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2006 switchchar = arg[3];
2008 f.queue_2stage = TRUE;
2011 /* Make -r synonymous with -f, since it is a documented alias */
2013 else if (arg[1] == 'r') switchchar = 'f';
2015 /* Make -ov synonymous with -v */
2017 else if (Ustrcmp(arg, "-ov") == 0)
2023 /* deal with --option_aliases */
2024 else if (switchchar == '-')
2026 if (Ustrcmp(argrest, "help") == 0)
2028 usage_wanted = TRUE;
2031 else if (Ustrcmp(argrest, "version") == 0)
2038 /* High-level switch on active initial letter */
2043 /* sendmail uses -Ac and -Am to control which .cf file is used;
2046 if (!*argrest) { badarg = TRUE; break; }
2049 BOOL ignore = FALSE;
2054 if (*(argrest + 1) == '\0')
2058 if (!ignore) badarg = TRUE;
2062 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2063 so has no need of it. */
2066 if (!*argrest) i++; /* Skip over the type */
2072 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2076 /* -bd: Run in daemon mode, awaiting SMTP connections.
2077 -bdf: Ditto, but in the foreground.
2080 f.daemon_listen = TRUE;
2081 if (*argrest == 'f') f.background_daemon = FALSE;
2082 else if (*argrest) badarg = TRUE;
2085 /* -be: Run in expansion test mode
2086 -bem: Ditto, but read a message from a file first
2089 expansion_test = checking = TRUE;
2090 if (*argrest == 'm')
2092 if (++i >= argc) { badarg = TRUE; break; }
2093 expansion_test_message = argv[i];
2096 if (*argrest) badarg = TRUE;
2099 /* -bF: Run system filter test */
2101 filter_test |= checking = FTEST_SYSTEM;
2102 if (*argrest) badarg = TRUE;
2103 else if (++i < argc) filter_test_sfile = argv[i];
2104 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2107 /* -bf: Run user filter test
2108 -bfd: Set domain for filter testing
2109 -bfl: Set local part for filter testing
2110 -bfp: Set prefix for filter testing
2111 -bfs: Set suffix for filter testing
2116 filter_test |= checking = FTEST_USER;
2117 if (++i < argc) filter_test_ufile = argv[i];
2118 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2123 exim_fail("exim: string expected after %s\n", arg);
2124 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2125 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2126 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2127 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2132 /* -bh: Host checking - an IP address must follow. */
2134 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2136 if (++i >= argc) { badarg = TRUE; break; }
2137 sender_host_address = string_copy_taint(argv[i], TRUE);
2138 host_checking = checking = f.log_testing_mode = TRUE;
2139 f.host_checking_callout = *argrest == 'c';
2140 message_logs = FALSE;
2145 /* -bi: This option is used by sendmail to initialize *the* alias file,
2146 though it has the -oA option to specify a different file. Exim has no
2147 concept of *the* alias file, but since Sun's YP make script calls
2148 sendmail this way, some support must be provided. */
2150 if (!*++argrest) bi_option = TRUE;
2154 /* -bI: provide information, of the type to follow after a colon.
2155 This is an Exim flag. */
2157 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2159 uschar *p = argrest+1;
2160 info_flag = CMDINFO_HELP;
2162 if (strcmpic(p, CUS"sieve") == 0)
2164 info_flag = CMDINFO_SIEVE;
2167 else if (strcmpic(p, CUS"dscp") == 0)
2169 info_flag = CMDINFO_DSCP;
2172 else if (strcmpic(p, CUS"help") == 0)
2178 /* -bm: Accept and deliver message - the default option. Reinstate
2179 receiving_message, which got turned off for all -b options.
2180 -bmalware: test the filename given for malware */
2182 if (!*argrest) receiving_message = TRUE;
2183 else if (Ustrcmp(argrest, "alware") == 0)
2185 if (++i >= argc) { badarg = TRUE; break; }
2187 malware_test_file = argv[i];
2192 /* -bnq: For locally originating messages, do not qualify unqualified
2193 addresses. In the envelope, this causes errors; in header lines they
2196 if (Ustrcmp(argrest, "q") == 0)
2198 f.allow_unqualified_sender = FALSE;
2199 f.allow_unqualified_recipient = FALSE;
2204 /* -bpxx: List the contents of the mail queue, in various forms. If
2205 the option is -bpc, just a queue count is needed. Otherwise, if the
2206 first letter after p is r, then order is random. */
2208 if (*argrest == 'c')
2211 if (*++argrest) badarg = TRUE;
2215 if (*argrest == 'r')
2217 list_queue_option = 8;
2220 else list_queue_option = 0;
2224 /* -bp: List the contents of the mail queue, top-level only */
2228 /* -bpu: List the contents of the mail queue, top-level undelivered */
2230 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2232 /* -bpa: List the contents of the mail queue, including all delivered */
2234 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2236 /* Unknown after -bp[r] */
2242 /* -bP: List the configuration variables given as the address list.
2243 Force -v, so configuration errors get displayed. */
2246 /* -bP config: we need to setup here, because later,
2247 * when list_options is checked, the config is read already */
2250 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2253 readconf_save_config(version_string);
2257 list_options = TRUE;
2258 debug_selector |= D_v;
2259 debug_file = stderr;
2263 /* -brt: Test retry configuration lookup */
2265 if (Ustrcmp(argrest, "t") == 0)
2268 test_retry_arg = i + 1;
2272 /* -brw: Test rewrite configuration */
2274 else if (Ustrcmp(argrest, "w") == 0)
2277 test_rewrite_arg = i + 1;
2283 /* -bS: Read SMTP commands on standard input, but produce no replies -
2284 all errors are reported by sending messages. */
2287 smtp_input = smtp_batched_input = receiving_message = TRUE;
2291 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2292 on standard output. */
2294 if (!*argrest) smtp_input = receiving_message = TRUE;
2298 /* -bt: address testing mode */
2301 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2305 /* -bv: verify addresses */
2308 verify_address_mode = checking = f.log_testing_mode = TRUE;
2310 /* -bvs: verify sender addresses */
2312 else if (Ustrcmp(argrest, "s") == 0)
2314 verify_address_mode = checking = f.log_testing_mode = TRUE;
2315 verify_as_sender = TRUE;
2320 /* -bV: Print version string and support details */
2324 printf("Exim version %s #%s built %s\n", version_string,
2325 version_cnumber, version_date);
2326 printf("%s\n", CS version_copyright);
2327 version_printed = TRUE;
2328 show_whats_supported(stdout);
2329 f.log_testing_mode = TRUE;
2334 /* -bw: inetd wait mode, accept a listening socket as stdin */
2336 f.inetd_wait_mode = TRUE;
2337 f.background_daemon = FALSE;
2338 f.daemon_listen = TRUE;
2340 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2341 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2352 /* -C: change configuration file list; ignore if it isn't really
2353 a change! Enforce a prefix check if required. */
2357 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2358 if (Ustrcmp(config_main_filelist, argrest) != 0)
2360 #ifdef ALT_CONFIG_PREFIX
2362 int len = Ustrlen(ALT_CONFIG_PREFIX);
2363 const uschar *list = argrest;
2365 while((filename = string_nextinlist(&list, &sep, big_buffer,
2367 if ( ( Ustrlen(filename) < len
2368 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2369 || Ustrstr(filename, "/../") != NULL
2371 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2373 exim_fail("-C Permission denied\n");
2375 if (real_uid != root_uid)
2377 #ifdef TRUSTED_CONFIG_LIST
2379 if (real_uid != exim_uid
2380 #ifdef CONFIGURE_OWNER
2381 && real_uid != config_uid
2384 f.trusted_config = FALSE;
2387 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2390 struct stat statbuf;
2392 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2393 (statbuf.st_uid != root_uid /* owner not root */
2394 #ifdef CONFIGURE_OWNER
2395 && statbuf.st_uid != config_uid /* owner not the special one */
2398 (statbuf.st_gid != root_gid /* group not root */
2399 #ifdef CONFIGURE_GROUP
2400 && statbuf.st_gid != config_gid /* group not the special one */
2402 && (statbuf.st_mode & 020) != 0 /* group writeable */
2404 (statbuf.st_mode & 2) != 0) /* world writeable */
2406 f.trusted_config = FALSE;
2411 /* Well, the trust list at least is up to scratch... */
2413 uschar *trusted_configs[32];
2416 int old_pool = store_pool;
2417 store_pool = POOL_MAIN;
2419 reset_point = store_mark();
2420 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2422 uschar *start = big_buffer, *nl;
2423 while (*start && isspace(*start))
2427 nl = Ustrchr(start, '\n');
2430 trusted_configs[nr_configs++] = string_copy(start);
2431 if (nr_configs == nelem(trusted_configs))
2439 const uschar *list = argrest;
2441 while (f.trusted_config && (filename = string_nextinlist(&list,
2442 &sep, big_buffer, big_buffer_size)))
2444 for (i=0; i < nr_configs; i++)
2445 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2447 if (i == nr_configs)
2449 f.trusted_config = FALSE;
2454 else /* No valid prefixes found in trust_list file. */
2455 f.trusted_config = FALSE;
2456 store_reset(reset_point);
2457 store_pool = old_pool;
2460 else /* Could not open trust_list file. */
2461 f.trusted_config = FALSE;
2464 /* Not root; don't trust config */
2465 f.trusted_config = FALSE;
2469 config_main_filelist = argrest;
2470 f.config_changed = TRUE;
2475 /* -D: set up a macro definition */
2478 #ifdef DISABLE_D_OPTION
2479 exim_fail("exim: -D is not available in this Exim binary\n");
2485 uschar *s = argrest;
2488 while (isspace(*s)) s++;
2490 if (*s < 'A' || *s > 'Z')
2491 exim_fail("exim: macro name set by -D must start with "
2492 "an upper case letter\n");
2494 while (isalnum(*s) || *s == '_')
2496 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2500 if (ptr == 0) { badarg = TRUE; break; }
2501 while (isspace(*s)) s++;
2504 if (*s++ != '=') { badarg = TRUE; break; }
2505 while (isspace(*s)) s++;
2508 for (m = macros_user; m; m = m->next)
2509 if (Ustrcmp(m->name, name) == 0)
2510 exim_fail("exim: duplicated -D in command line\n");
2512 m = macro_create(name, s, TRUE);
2514 if (clmacro_count >= MAX_CLMACROS)
2515 exim_fail("exim: too many -D options on command line\n");
2516 clmacros[clmacro_count++] =
2517 string_sprintf("-D%s=%s", m->name, m->replacement);
2522 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2523 The latter is now a no-op, retained for compatibility only. If -dd is used,
2524 debugging subprocesses of the daemon is disabled. */
2527 if (Ustrcmp(argrest, "ropcr") == 0)
2529 /* drop_cr = TRUE; */
2532 /* Use an intermediate variable so that we don't set debugging while
2533 decoding the debugging bits. */
2537 unsigned int selector = D_default;
2540 if (*argrest == 'd')
2542 f.debug_daemon = TRUE;
2546 decode_bits(&selector, 1, debug_notall, argrest,
2547 debug_options, debug_options_count, US"debug", 0);
2548 debug_selector = selector;
2553 /* -E: This is a local error message. This option is not intended for
2554 external use at all, but is not restricted to trusted callers because it
2555 does no harm (just suppresses certain error messages) and if Exim is run
2556 not setuid root it won't always be trusted when it generates error
2557 messages using this option. If there is a message id following -E, point
2558 message_reference at it, for logging. */
2561 f.local_error_message = TRUE;
2562 if (mac_ismsgid(argrest)) message_reference = argrest;
2566 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2567 option, so it looks as if historically the -oex options are also callable
2568 without the leading -o. So we have to accept them. Before the switch,
2569 anything starting -oe has been converted to -e. Exim does not support all
2570 of the sendmail error options. */
2573 if (Ustrcmp(argrest, "e") == 0)
2575 arg_error_handling = ERRORS_SENDER;
2576 errors_sender_rc = EXIT_SUCCESS;
2578 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2579 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2580 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2581 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2586 /* -F: Set sender's full name, used instead of the gecos entry from
2587 the password file. Since users can usually alter their gecos entries,
2588 there's no security involved in using this instead. The data can follow
2589 the -F or be in the next argument. */
2593 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2594 originator_name = string_copy_taint(argrest, TRUE);
2595 f.sender_name_forced = TRUE;
2599 /* -f: Set sender's address - this value is only actually used if Exim is
2600 run by a trusted user, or if untrusted_set_sender is set and matches the
2601 address, except that the null address can always be set by any user. The
2602 test for this happens later, when the value given here is ignored when not
2603 permitted. For an untrusted user, the actual sender is still put in Sender:
2604 if it doesn't match the From: header (unless no_local_from_check is set).
2605 The data can follow the -f or be in the next argument. The -r switch is an
2606 obsolete form of -f but since there appear to be programs out there that
2607 use anything that sendmail has ever supported, better accept it - the
2608 synonymizing is done before the switch above.
2610 At this stage, we must allow domain literal addresses, because we don't
2611 know what the setting of allow_domain_literals is yet. Ditto for trailing
2612 dots and strip_trailing_dot. */
2616 int dummy_start, dummy_end;
2619 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2621 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2624 uschar * temp = argrest + Ustrlen(argrest) - 1;
2625 while (temp >= argrest && isspace(*temp)) temp--;
2626 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2627 allow_domain_literals = TRUE;
2628 strip_trailing_dot = TRUE;
2630 allow_utf8_domains = TRUE;
2632 if (!(sender_address = parse_extract_address(argrest, &errmess,
2633 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2634 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2636 sender_address = string_copy_taint(sender_address, TRUE);
2638 message_smtputf8 = string_is_utf8(sender_address);
2639 allow_utf8_domains = FALSE;
2641 allow_domain_literals = FALSE;
2642 strip_trailing_dot = FALSE;
2644 f.sender_address_forced = TRUE;
2648 /* -G: sendmail invocation to specify that it's a gateway submission and
2649 sendmail may complain about problems instead of fixing them.
2650 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2651 not at this time complain about problems. */
2657 /* -h: Set the hop count for an incoming message. Exim does not currently
2658 support this; it always computes it by counting the Received: headers.
2659 To put it in will require a change to the spool header file format. */
2663 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2664 if (!isdigit(*argrest)) badarg = TRUE;
2668 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2669 not to be documented for sendmail but mailx (at least) uses it) */
2672 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2676 /* -L: set the identifier used for syslog; equivalent to setting
2677 syslog_processname in the config file, but needs to be an admin option. */
2681 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2682 if ((sz = Ustrlen(argrest)) > 32)
2683 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2685 exim_fail("exim: the -L syslog name is too short\n");
2686 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2690 receiving_message = FALSE;
2692 /* -MC: continue delivery of another message via an existing open
2693 file descriptor. This option is used for an internal call by the
2694 smtp transport when there is a pending message waiting to go to an
2695 address to which it has got a connection. Five subsequent arguments are
2696 required: transport name, host name, IP address, sequence number, and
2697 message_id. Transports may decline to create new processes if the sequence
2698 number gets too big. The channel is stdin. This (-MC) must be the last
2699 argument. There's a subsequent check that the real-uid is privileged.
2701 If we are running in the test harness. delay for a bit, to let the process
2702 that set this one up complete. This makes for repeatability of the logging,
2705 if (Ustrcmp(argrest, "C") == 0)
2707 union sockaddr_46 interface_sock;
2708 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2711 exim_fail("exim: too many or too few arguments after -MC\n");
2713 if (msg_action_arg >= 0)
2714 exim_fail("exim: incompatible arguments\n");
2716 continue_transport = string_copy_taint(argv[++i], TRUE);
2717 continue_hostname = string_copy_taint(argv[++i], TRUE);
2718 continue_host_address = string_copy_taint(argv[++i], TRUE);
2719 continue_sequence = Uatoi(argv[++i]);
2720 msg_action = MSG_DELIVER;
2721 msg_action_arg = ++i;
2722 forced_delivery = TRUE;
2723 queue_run_pid = passed_qr_pid;
2724 queue_run_pipe = passed_qr_pipe;
2726 if (!mac_ismsgid(argv[i]))
2727 exim_fail("exim: malformed message id %s after -MC option\n",
2730 /* Set up $sending_ip_address and $sending_port, unless proxied */
2732 if (!continue_proxy_cipher)
2733 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2735 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2738 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2741 testharness_pause_ms(500);
2745 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2749 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2750 precedes -MC (see above). The flag indicates that the host to which
2751 Exim is connected has accepted an AUTH sequence. */
2753 case 'A': f.smtp_authenticated = TRUE; break;
2755 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2756 that exim is connected to supports the esmtp extension DSN */
2758 case 'D': smtp_peer_options |= OPTION_DSN; break;
2760 /* -MCd: for debug, set a process-purpose string */
2762 case 'd': if (++i < argc)
2763 process_purpose = string_copy_taint(argv[i], TRUE);
2767 /* -MCG: set the queue name, to a non-default value */
2769 case 'G': if (++i < argc) queue_name = string_copy_taint(argv[i], TRUE);
2773 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2775 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2777 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2778 it preceded -MC (see above) */
2780 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2782 /* -MCQ: pass on the pid of the queue-running process that started
2783 this chain of deliveries and the fd of its synchronizing pipe; this
2784 is useful only when it precedes -MC (see above) */
2786 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2788 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2792 /* -MCS: set the smtp_use_size flag; this is useful only when it
2793 precedes -MC (see above) */
2795 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2798 /* -MCt: similar to -MCT below but the connection is still open
2799 via a proxy process which handles the TLS context and coding.
2800 Require three arguments for the proxied local address and port,
2801 and the TLS cipher. */
2803 case 't': if (++i < argc)
2804 sending_ip_address = string_copy_taint(argv[i], TRUE);
2807 sending_port = (int)(Uatol(argv[i]));
2810 continue_proxy_cipher = string_copy_taint(argv[i], TRUE);
2814 /* -MCT: set the tls_offered flag; this is useful only when it
2815 precedes -MC (see above). The flag indicates that the host to which
2816 Exim is connected has offered TLS support. */
2818 case 'T': smtp_peer_options |= OPTION_TLS; break;
2821 default: badarg = TRUE; break;
2826 /* -M[x]: various operations on the following list of message ids:
2827 -M deliver the messages, ignoring next retry times and thawing
2828 -Mc deliver the messages, checking next retry times, no thawing
2829 -Mf freeze the messages
2830 -Mg give up on the messages
2831 -Mt thaw the messages
2832 -Mrm remove the messages
2833 In the above cases, this must be the last option. There are also the
2834 following options which are followed by a single message id, and which
2835 act on that message. Some of them use the "recipient" addresses as well.
2836 -Mar add recipient(s)
2837 -Mmad mark all recipients delivered
2838 -Mmd mark recipients(s) delivered
2840 -Mset load a message for use with -be
2842 -Mvc show copy (of whole message, in RFC 2822 format)
2849 msg_action = MSG_DELIVER;
2850 forced_delivery = f.deliver_force_thaw = TRUE;
2852 else if (Ustrcmp(argrest, "ar") == 0)
2854 msg_action = MSG_ADD_RECIPIENT;
2855 one_msg_action = TRUE;
2857 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2858 else if (Ustrcmp(argrest, "es") == 0)
2860 msg_action = MSG_EDIT_SENDER;
2861 one_msg_action = TRUE;
2863 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2864 else if (Ustrcmp(argrest, "g") == 0)
2866 msg_action = MSG_DELIVER;
2867 deliver_give_up = TRUE;
2869 else if (Ustrcmp(argrest, "G") == 0)
2871 msg_action = MSG_SETQUEUE;
2872 queue_name_dest = string_copy_taint(argv[++i], TRUE);
2874 else if (Ustrcmp(argrest, "mad") == 0)
2876 msg_action = MSG_MARK_ALL_DELIVERED;
2878 else if (Ustrcmp(argrest, "md") == 0)
2880 msg_action = MSG_MARK_DELIVERED;
2881 one_msg_action = TRUE;
2883 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2884 else if (Ustrcmp(argrest, "set") == 0)
2886 msg_action = MSG_LOAD;
2887 one_msg_action = TRUE;
2889 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2890 else if (Ustrcmp(argrest, "vb") == 0)
2892 msg_action = MSG_SHOW_BODY;
2893 one_msg_action = TRUE;
2895 else if (Ustrcmp(argrest, "vc") == 0)
2897 msg_action = MSG_SHOW_COPY;
2898 one_msg_action = TRUE;
2900 else if (Ustrcmp(argrest, "vh") == 0)
2902 msg_action = MSG_SHOW_HEADER;
2903 one_msg_action = TRUE;
2905 else if (Ustrcmp(argrest, "vl") == 0)
2907 msg_action = MSG_SHOW_LOG;
2908 one_msg_action = TRUE;
2910 else { badarg = TRUE; break; }
2912 /* All the -Mxx options require at least one message id. */
2914 msg_action_arg = i + 1;
2915 if (msg_action_arg >= argc)
2916 exim_fail("exim: no message ids given after %s option\n", arg);
2918 /* Some require only message ids to follow */
2920 if (!one_msg_action)
2922 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2923 exim_fail("exim: malformed message id %s after %s option\n",
2925 goto END_ARG; /* Remaining args are ids */
2928 /* Others require only one message id, possibly followed by addresses,
2929 which will be handled as normal arguments. */
2933 if (!mac_ismsgid(argv[msg_action_arg]))
2934 exim_fail("exim: malformed message id %s after %s option\n",
2935 argv[msg_action_arg], arg);
2941 /* Some programs seem to call the -om option without the leading o;
2942 for sendmail it askes for "me too". Exim always does this. */
2945 if (*argrest) badarg = TRUE;
2949 /* -N: don't do delivery - a debugging option that stops transports doing
2950 their thing. It implies debugging at the D_v level. */
2955 f.dont_deliver = TRUE;
2956 debug_selector |= D_v;
2957 debug_file = stderr;
2963 /* -n: This means "don't alias" in sendmail, apparently.
2964 For normal invocations, it has no effect.
2965 It may affect some other options. */
2971 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2972 option to the specified value. This form uses long names. We need to handle
2973 -O option=value and -Ooption=value. */
2978 exim_fail("exim: string expected after -O\n");
2984 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2987 if (!*(alias_arg = argrest))
2988 if (i+1 < argc) alias_arg = argv[++i];
2989 else exim_fail("exim: string expected after -oA\n");
2992 /* -oB: Set a connection message max value for remote deliveries */
2995 uschar * p = argrest;
2997 if (i+1 < argc && isdigit((argv[i+1][0])))
3001 connection_max_messages = 1;
3008 exim_fail("exim: number expected after -oB\n");
3009 connection_max_messages = Uatoi(p);
3014 /* -odb: background delivery */
3017 if (Ustrcmp(argrest, "b") == 0)
3019 f.synchronous_delivery = FALSE;
3020 arg_queue_only = FALSE;
3021 queue_only_set = TRUE;
3024 /* -odd: testsuite-only: add no inter-process delays */
3026 else if (Ustrcmp(argrest, "d") == 0)
3027 f.testsuite_delays = FALSE;
3029 /* -odf: foreground delivery (smail-compatible option); same effect as
3030 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3033 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3035 f.synchronous_delivery = TRUE;
3036 arg_queue_only = FALSE;
3037 queue_only_set = TRUE;
3040 /* -odq: queue only */
3042 else if (Ustrcmp(argrest, "q") == 0)
3044 f.synchronous_delivery = FALSE;
3045 arg_queue_only = TRUE;
3046 queue_only_set = TRUE;
3049 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3050 but no remote delivery */
3052 else if (Ustrcmp(argrest, "qs") == 0)
3054 f.queue_smtp = TRUE;
3055 arg_queue_only = FALSE;
3056 queue_only_set = TRUE;
3061 /* -oex: Sendmail error flags. As these are also accepted without the
3062 leading -o prefix, for compatibility with vacation and other callers,
3063 they are handled with -e above. */
3065 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3066 -oitrue: Another sendmail syntax for the same */
3069 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3074 /* -oM*: Set various characteristics for an incoming message; actually
3075 acted on for trusted callers only. */
3080 exim_fail("exim: data expected after -oM%s\n", argrest);
3082 /* -oMa: Set sender host address */
3084 if (Ustrcmp(argrest, "a") == 0)
3085 sender_host_address = string_copy_taint(argv[++i], TRUE);
3087 /* -oMaa: Set authenticator name */
3089 else if (Ustrcmp(argrest, "aa") == 0)
3090 sender_host_authenticated = string_copy_taint(argv[++i], TRUE);
3092 /* -oMas: setting authenticated sender */
3094 else if (Ustrcmp(argrest, "as") == 0)
3095 authenticated_sender = string_copy_taint(argv[++i], TRUE);
3097 /* -oMai: setting authenticated id */
3099 else if (Ustrcmp(argrest, "ai") == 0)
3100 authenticated_id = string_copy_taint(argv[++i], TRUE);
3102 /* -oMi: Set incoming interface address */
3104 else if (Ustrcmp(argrest, "i") == 0)
3105 interface_address = string_copy_taint(argv[++i], TRUE);
3107 /* -oMm: Message reference */
3109 else if (Ustrcmp(argrest, "m") == 0)
3111 if (!mac_ismsgid(argv[i+1]))
3112 exim_fail("-oMm must be a valid message ID\n");
3113 if (!f.trusted_config)
3114 exim_fail("-oMm must be called by a trusted user/config\n");
3115 message_reference = argv[++i];
3118 /* -oMr: Received protocol */
3120 else if (Ustrcmp(argrest, "r") == 0)
3122 if (received_protocol)
3123 exim_fail("received_protocol is set already\n");
3125 received_protocol = string_copy_taint(argv[++i], TRUE);
3127 /* -oMs: Set sender host name */
3129 else if (Ustrcmp(argrest, "s") == 0)
3130 sender_host_name = string_copy_taint(argv[++i], TRUE);
3132 /* -oMt: Set sender ident */
3134 else if (Ustrcmp(argrest, "t") == 0)
3136 sender_ident_set = TRUE;
3137 sender_ident = string_copy_taint(argv[++i], TRUE);
3140 /* Else a bad argument */
3147 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3148 seem to call this as -m (undocumented), so that is also accepted (see
3150 /* -oo: An ancient flag for old-style addresses which still seems to
3151 crop up in some calls (see in SCO). */
3155 if (*argrest) badarg = TRUE;
3158 /* -oP <name>: set pid file path for daemon
3159 -oPX: delete pid file of daemon */
3162 if (!*argrest) override_pid_file_path = argv[++i];
3163 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3168 /* -or <n>: set timeout for non-SMTP acceptance
3169 -os <n>: set timeout for SMTP acceptance */
3174 int * tp = argrest[-1] == 'r'
3175 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3177 *tp = readconf_readtime(argrest, 0, FALSE);
3178 else if (i+1 < argc)
3179 *tp = readconf_readtime(argv[++i], 0, FALSE);
3182 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3186 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3189 if (*argrest) badarg = TRUE;
3190 else override_local_interfaces = string_copy_taint(argv[++i], TRUE);
3193 /* Unknown -o argument */
3201 /* -ps: force Perl startup; -pd force delayed Perl startup */
3205 if (*argrest == 's' && argrest[1] == 0)
3207 perl_start_option = 1;
3210 if (*argrest == 'd' && argrest[1] == 0)
3212 perl_start_option = -1;
3217 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3218 which sets the host protocol and host name */
3221 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3225 uschar * hn = Ustrchr(argrest, ':');
3227 if (received_protocol)
3228 exim_fail("received_protocol is set already\n");
3231 received_protocol = string_copy_taint(argrest, TRUE);
3234 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3235 sender_host_name = string_copy_taint(hn + 1, TRUE);
3242 receiving_message = FALSE;
3243 if (queue_interval >= 0)
3244 exim_fail("exim: -q specified more than once\n");
3246 /* -qq...: Do queue runs in a 2-stage manner */
3248 if (*argrest == 'q')
3250 f.queue_2stage = TRUE;
3254 /* -qi...: Do only first (initial) deliveries */
3256 if (*argrest == 'i')
3258 f.queue_run_first_delivery = TRUE;
3262 /* -qf...: Run the queue, forcing deliveries
3263 -qff..: Ditto, forcing thawing as well */
3265 if (*argrest == 'f')
3267 f.queue_run_force = TRUE;
3268 if (*++argrest == 'f')
3270 f.deliver_force_thaw = TRUE;
3275 /* -q[f][f]l...: Run the queue only on local deliveries */
3277 if (*argrest == 'l')
3279 f.queue_run_local = TRUE;
3283 /* -q[f][f][l][G<name>]... Work on the named queue */
3285 if (*argrest == 'G')
3288 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3289 queue_name = string_copyn(argrest, i);
3291 if (*argrest == '/') argrest++;
3294 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3295 only, optionally named, optionally starting from a given message id. */
3297 if (!(list_queue || count_queue))
3299 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3302 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3303 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3304 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3305 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3308 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3309 forced, optionally local only, optionally named. */
3311 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3313 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3317 case 'R': /* Synonymous with -qR... */
3318 receiving_message = FALSE;
3320 /* -Rf: As -R (below) but force all deliveries,
3321 -Rff: Ditto, but also thaw all frozen messages,
3322 -Rr: String is regex
3323 -Rrf: Regex and force
3324 -Rrff: Regex and force and thaw
3326 in all cases provided there are no further characters in this
3330 for (int i = 0; i < nelem(rsopts); i++)
3331 if (Ustrcmp(argrest, rsopts[i]) == 0)
3333 if (i != 2) f.queue_run_force = TRUE;
3334 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3335 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3336 argrest += Ustrlen(rsopts[i]);
3339 /* -R: Set string to match in addresses for forced queue run to
3340 pick out particular messages. */
3343 deliver_selectstring = string_copy_taint(argrest, TRUE);
3344 else if (i+1 < argc)
3345 deliver_selectstring = string_copy_taint(argv[++i], TRUE);
3347 exim_fail("exim: string expected after -R\n");
3351 /* -r: an obsolete synonym for -f (see above) */
3354 /* -S: Like -R but works on sender. */
3356 case 'S': /* Synonymous with -qS... */
3357 receiving_message = FALSE;
3359 /* -Sf: As -S (below) but force all deliveries,
3360 -Sff: Ditto, but also thaw all frozen messages,
3361 -Sr: String is regex
3362 -Srf: Regex and force
3363 -Srff: Regex and force and thaw
3365 in all cases provided there are no further characters in this
3369 for (int i = 0; i < nelem(rsopts); i++)
3370 if (Ustrcmp(argrest, rsopts[i]) == 0)
3372 if (i != 2) f.queue_run_force = TRUE;
3373 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3374 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3375 argrest += Ustrlen(rsopts[i]);
3378 /* -S: Set string to match in addresses for forced queue run to
3379 pick out particular messages. */
3382 deliver_selectstring_sender = string_copy_taint(argrest, TRUE);
3383 else if (i+1 < argc)
3384 deliver_selectstring_sender = string_copy_taint(argv[++i], TRUE);
3386 exim_fail("exim: string expected after -S\n");
3389 /* -Tqt is an option that is exclusively for use by the testing suite.
3390 It is not recognized in other circumstances. It allows for the setting up
3391 of explicit "queue times" so that various warning/retry things can be
3392 tested. Otherwise variability of clock ticks etc. cause problems. */
3395 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3396 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3401 /* -t: Set flag to extract recipients from body of message. */
3404 if (!*argrest) extract_recipients = TRUE;
3406 /* -ti: Set flag to extract recipients from body of message, and also
3407 specify that dot does not end the message. */
3409 else if (Ustrcmp(argrest, "i") == 0)
3411 extract_recipients = TRUE;
3415 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3418 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3425 /* -U: This means "initial user submission" in sendmail, apparently. The
3426 doc claims that in future sendmail may refuse syntactically invalid
3427 messages instead of fixing them. For the moment, we just ignore it. */
3433 /* -v: verify things - this is a very low-level debugging */
3438 debug_selector |= D_v;
3439 debug_file = stderr;
3445 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3447 The -x flag tells the sendmail command that mail from a local
3448 mail program has National Language Support (NLS) extended characters
3449 in the body of the mail item. The sendmail command can send mail with
3450 extended NLS characters across networks that normally corrupts these
3453 As Exim is 8-bit clean, it just ignores this flag. */
3456 if (*argrest) badarg = TRUE;
3459 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3460 logs to that file. We swallow the parameter and otherwise ignore it. */
3465 exim_fail("exim: string expected after -X\n");
3471 log_oneline = string_copy_taint(argv[i], TRUE);
3473 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3476 /* All other initial characters are errors */
3481 } /* End of high-level switch statement */
3483 /* Failed to recognize the option, or syntax error */
3486 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3487 "option %s\n", arg);
3491 /* If -R or -S have been specified without -q, assume a single queue run. */
3493 if ( (deliver_selectstring || deliver_selectstring_sender)
3494 && queue_interval < 0)
3499 store_pool = old_pool;
3502 /* If usage_wanted is set we call the usage function - which never returns */
3503 if (usage_wanted) exim_usage(called_as);
3505 /* Arguments have been processed. Check for incompatibilities. */
3507 (smtp_input || extract_recipients || recipients_arg < argc) &&
3508 (f.daemon_listen || queue_interval >= 0 || bi_option ||
3509 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
3510 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
3513 msg_action_arg > 0 &&
3514 (f.daemon_listen || queue_interval > 0 || list_options ||
3515 (checking && msg_action != MSG_LOAD) ||
3516 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
3519 (f.daemon_listen || queue_interval > 0) &&
3520 (sender_address != NULL || list_options || list_queue || checking ||
3524 f.daemon_listen && queue_interval == 0
3527 f.inetd_wait_mode && queue_interval >= 0
3531 (checking || smtp_input || extract_recipients ||
3532 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)
3540 f.address_test_mode && (smtp_input || extract_recipients ||
3541 filter_test != FTEST_NONE || bi_option)
3544 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
3548 deliver_selectstring != NULL && queue_interval < 0
3551 msg_action == MSG_LOAD &&
3552 (!expansion_test || expansion_test_message != NULL)
3555 exim_fail("exim: incompatible command-line options or arguments\n");
3557 /* If debugging is set up, set the file and the file descriptor to pass on to
3558 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3559 to run in the foreground. */
3561 if (debug_selector != 0)
3563 debug_file = stderr;
3564 debug_fd = fileno(debug_file);
3565 f.background_daemon = FALSE;
3566 testharness_pause_ms(100); /* lets caller finish */
3567 if (debug_selector != D_v) /* -v only doesn't show this */
3569 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3570 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3572 if (!version_printed)
3573 show_whats_supported(stderr);
3577 /* When started with root privilege, ensure that the limits on the number of
3578 open files and the number of processes (where that is accessible) are
3579 sufficiently large, or are unset, in case Exim has been called from an
3580 environment where the limits are screwed down. Not all OS have the ability to
3581 change some of these limits. */
3585 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3591 #ifdef RLIMIT_NOFILE
3592 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3594 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3596 rlp.rlim_cur = rlp.rlim_max = 0;
3599 /* I originally chose 1000 as a nice big number that was unlikely to
3600 be exceeded. It turns out that some older OS have a fixed upper limit of
3603 if (rlp.rlim_cur < 1000)
3605 rlp.rlim_cur = rlp.rlim_max = 1000;
3606 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3608 rlp.rlim_cur = rlp.rlim_max = 256;
3609 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3610 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3617 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3619 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3621 rlp.rlim_cur = rlp.rlim_max = 0;
3624 #ifdef RLIM_INFINITY
3625 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3627 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3629 if (rlp.rlim_cur < 1000)
3631 rlp.rlim_cur = rlp.rlim_max = 1000;
3633 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3634 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3640 /* Exim is normally entered as root (but some special configurations are
3641 possible that don't do this). However, it always spins off sub-processes that
3642 set their uid and gid as required for local delivery. We don't want to pass on
3643 any extra groups that root may belong to, so we want to get rid of them all at
3646 We need to obey setgroups() at this stage, before possibly giving up root
3647 privilege for a changed configuration file, but later on we might need to
3648 check on the additional groups for the admin user privilege - can't do that
3649 till after reading the config, which might specify the exim gid. Therefore,
3650 save the group list here first. */
3652 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3653 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3655 /* There is a fundamental difference in some BSD systems in the matter of
3656 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3657 known not to be different. On the "different" systems there is a single group
3658 list, and the first entry in it is the current group. On all other versions of
3659 Unix there is a supplementary group list, which is in *addition* to the current
3660 group. Consequently, to get rid of all extraneous groups on a "standard" system
3661 you pass over 0 groups to setgroups(), while on a "different" system you pass
3662 over a single group - the current group, which is always the first group in the
3663 list. Calling setgroups() with zero groups on a "different" system results in
3664 an error return. The following code should cope with both types of system.
3666 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3667 the "setgroups() with zero groups" - and changes the egid.
3668 Thanks to that we had to stash the original_egid above, for use below
3669 in the call to exim_setugid().
3671 However, if this process isn't running as root, setgroups() can't be used
3672 since you have to be root to run it, even if throwing away groups.
3673 Except, sigh, for Hurd - where you can.
3674 Not being root here happens only in some unusual configurations. */
3677 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3678 && setgroups(0, NULL) != 0
3680 && setgroups(1, group_list) != 0)
3681 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3683 /* If the configuration file name has been altered by an argument on the
3684 command line (either a new file name or a macro definition) and the caller is
3685 not root, or if this is a filter testing run, remove any setuid privilege the
3686 program has and run as the underlying user.
3688 The exim user is locked out of this, which severely restricts the use of -C
3691 Otherwise, set the real ids to the effective values (should be root unless run
3692 from inetd, which it can either be root or the exim uid, if one is configured).
3694 There is a private mechanism for bypassing some of this, in order to make it
3695 possible to test lots of configurations automatically, without having either to
3696 recompile each time, or to patch in an actual configuration file name and other
3697 values (such as the path name). If running in the test harness, pretend that
3698 configuration file changes and macro definitions haven't happened. */
3701 (!f.trusted_config || /* Config changed, or */
3702 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3703 real_uid != root_uid && /* Not root, and */
3704 !f.running_in_test_harness /* Not fudged */
3706 expansion_test /* expansion testing */
3708 filter_test != FTEST_NONE) /* Filter testing */
3710 setgroups(group_count, group_list);
3711 exim_setugid(real_uid, real_gid, FALSE,
3712 US"-C, -D, -be or -bf forces real uid");
3713 removed_privilege = TRUE;
3715 /* In the normal case when Exim is called like this, stderr is available
3716 and should be used for any logging information because attempts to write
3717 to the log will usually fail. To arrange this, we unset really_exim. However,
3718 if no stderr is available there is no point - we might as well have a go
3719 at the log (if it fails, syslog will be written).
3721 Note that if the invoker is Exim, the logs remain available. Messing with
3722 this causes unlogged successful deliveries. */
3724 if (log_stderr && real_uid != exim_uid)
3725 f.really_exim = FALSE;
3728 /* Privilege is to be retained for the moment. It may be dropped later,
3729 depending on the job that this Exim process has been asked to do. For now, set
3730 the real uid to the effective so that subsequent re-execs of Exim are done by a
3734 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3736 /* If testing a filter, open the file(s) now, before wasting time doing other
3737 setups and reading the message. */
3739 if (filter_test & FTEST_SYSTEM)
3740 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3741 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3744 if (filter_test & FTEST_USER)
3745 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3746 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3749 /* Initialise lookup_list
3750 If debugging, already called above via version reporting.
3751 In either case, we initialise the list of available lookups while running
3752 as root. All dynamically modules are loaded from a directory which is
3753 hard-coded into the binary and is code which, if not a module, would be
3754 part of Exim already. Ability to modify the content of the directory
3755 is equivalent to the ability to modify a setuid binary!
3757 This needs to happen before we read the main configuration. */
3761 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3764 /* Read the main runtime configuration data; this gives up if there
3765 is a failure. It leaves the configuration file open so that the subsequent
3766 configuration data for delivery can be read if needed.
3768 NOTE: immediately after opening the configuration file we change the working
3769 directory to "/"! Later we change to $spool_directory. We do it there, because
3770 during readconf_main() some expansion takes place already. */
3772 /* Store the initial cwd before we change directories. Can be NULL if the
3773 dir has already been unlinked. */
3774 initial_cwd = os_getcwd(NULL, 0);
3777 -be[m] expansion test -
3778 -b[fF] filter test new
3780 -bmalware malware_test_file new
3782 -brw rewrite test new
3784 -bv[s] address verify -
3786 -bP <option> (except -bP config, which sets list_config)
3788 If any of these options is set, we suppress warnings about configuration
3789 issues (currently about tls_advertise_hosts and keep_environment not being
3793 #ifdef MEASURE_TIMING
3794 struct timeval t0, diff;
3795 (void)gettimeofday(&t0, NULL);
3798 readconf_main(checking || list_options);
3800 #ifdef MEASURE_TIMING
3801 report_time_since(&t0, US"readconf_main (delta)");
3806 /* Now in directory "/" */
3808 if (cleanup_environment() == FALSE)
3809 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3812 /* If an action on specific messages is requested, or if a daemon or queue
3813 runner is being started, we need to know if Exim was called by an admin user.
3814 This is the case if the real user is root or exim, or if the real group is
3815 exim, or if one of the supplementary groups is exim or a group listed in
3816 admin_groups. We don't fail all message actions immediately if not admin_user,
3817 since some actions can be performed by non-admin users. Instead, set admin_user
3818 for later interrogation. */
3820 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3821 f.admin_user = TRUE;
3823 for (int i = 0; i < group_count && !f.admin_user; i++)
3824 if (group_list[i] == exim_gid)
3825 f.admin_user = TRUE;
3826 else if (admin_groups)
3827 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3828 if (admin_groups[j] == group_list[i])
3829 f.admin_user = TRUE;
3831 /* Another group of privileged users are the trusted users. These are root,
3832 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3833 are permitted to specify sender_addresses with -f on the command line, and
3834 other message parameters as well. */
3836 if (real_uid == root_uid || real_uid == exim_uid)
3837 f.trusted_caller = TRUE;
3841 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3842 if (trusted_users[i] == real_uid)
3843 f.trusted_caller = TRUE;
3846 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3847 if (trusted_groups[i] == real_gid)
3848 f.trusted_caller = TRUE;
3849 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3850 if (trusted_groups[i] == group_list[j])
3851 f.trusted_caller = TRUE;
3854 /* At this point, we know if the user is privileged and some command-line
3855 options become possibly impermissible, depending upon the configuration file. */
3857 if (checking && commandline_checks_require_admin && !f.admin_user)
3858 exim_fail("exim: those command-line flags are set to require admin\n");
3860 /* Handle the decoding of logging options. */
3862 decode_bits(log_selector, log_selector_size, log_notall,
3863 log_selector_string, log_options, log_options_count, US"log", 0);
3867 debug_printf("configuration file is %s\n", config_main_filename);
3868 debug_printf("log selectors =");
3869 for (int i = 0; i < log_selector_size; i++)
3870 debug_printf(" %08x", log_selector[i]);
3874 /* If domain literals are not allowed, check the sender address that was
3875 supplied with -f. Ditto for a stripped trailing dot. */
3879 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3880 exim_fail("exim: bad -f address \"%s\": domain literals not "
3881 "allowed\n", sender_address);
3882 if (f_end_dot && !strip_trailing_dot)
3883 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3884 "(trailing dot not allowed)\n", sender_address);
3887 /* See if an admin user overrode our logging. */
3889 if (cmdline_syslog_name)
3892 syslog_processname = cmdline_syslog_name;
3893 log_file_path = string_copy(CUS"syslog");
3896 /* not a panic, non-privileged users should not be able to spam paniclog */
3898 "exim: you lack sufficient privilege to specify syslog process name\n");
3900 /* Paranoia check of maximum lengths of certain strings. There is a check
3901 on the length of the log file path in log.c, which will come into effect
3902 if there are any calls to write the log earlier than this. However, if we
3903 get this far but the string is very long, it is better to stop now than to
3904 carry on and (e.g.) receive a message and then have to collapse. The call to
3905 log_write() from here will cause the ultimate panic collapse if the complete
3906 file name exceeds the buffer length. */
3908 if (Ustrlen(log_file_path) > 200)
3909 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3910 "log_file_path is longer than 200 chars: aborting");
3912 if (Ustrlen(pid_file_path) > 200)
3913 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3914 "pid_file_path is longer than 200 chars: aborting");
3916 if (Ustrlen(spool_directory) > 200)
3917 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3918 "spool_directory is longer than 200 chars: aborting");
3920 /* Length check on the process name given to syslog for its TAG field,
3921 which is only permitted to be 32 characters or less. See RFC 3164. */
3923 if (Ustrlen(syslog_processname) > 32)
3924 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3925 "syslog_processname is longer than 32 chars: aborting");
3930 log_write(0, LOG_MAIN, "%s", log_oneline);
3931 return EXIT_SUCCESS;
3934 return EXIT_FAILURE;
3936 /* In some operating systems, the environment variable TMPDIR controls where
3937 temporary files are created; Exim doesn't use these (apart from when delivering
3938 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3939 If TMPDIR is found in the environment, reset it to the value defined in the
3940 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3941 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3942 EXIM_TMPDIR by the build scripts.
3946 if (environ) for (uschar ** p = USS environ; *p; p++)
3947 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
3949 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
3950 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
3952 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
3956 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3957 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3958 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3959 called by a user who has set the TZ variable. This then affects the timestamps
3960 in log files and in Received: headers, and any created Date: header lines. The
3961 required timezone is settable in the configuration file, so nothing can be done
3962 about this earlier - but hopefully nothing will normally be logged earlier than
3963 this. We have to make a new environment if TZ is wrong, but don't bother if
3964 timestamps_utc is set, because then all times are in UTC anyway. */
3966 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
3967 f.timestamps_utc = TRUE;
3970 uschar *envtz = US getenv("TZ");
3972 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
3973 : timezone_string != NULL
3976 uschar **p = USS environ;
3980 if (environ) while (*p++) count++;
3981 if (!envtz) count++;
3982 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
3983 if (environ) for (p = USS environ; *p; p++)
3984 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
3985 if (timezone_string)
3987 *newp = store_malloc(Ustrlen(timezone_string) + 4);
3988 sprintf(CS *newp++, "TZ=%s", timezone_string);
3993 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3994 tod_stamp(tod_log));
3998 /* Handle the case when we have removed the setuid privilege because of -C or
3999 -D. This means that the caller of Exim was not root.
4001 There is a problem if we were running as the Exim user. The sysadmin may
4002 expect this case to retain privilege because "the binary was called by the
4003 Exim user", but it hasn't, because either the -D option set macros, or the
4004 -C option set a non-trusted configuration file. There are two possibilities:
4006 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4007 to do message deliveries. Thus, the fact that it is running as a
4008 non-privileged user is plausible, and might be wanted in some special
4009 configurations. However, really_exim will have been set false when
4010 privilege was dropped, to stop Exim trying to write to its normal log
4011 files. Therefore, re-enable normal log processing, assuming the sysadmin
4012 has set up the log directory correctly.
4014 (2) If deliver_drop_privilege is not set, the configuration won't work as
4015 apparently intended, and so we log a panic message. In order to retain
4016 root for -C or -D, the caller must either be root or be invoking a
4017 trusted configuration file (when deliver_drop_privilege is false). */
4019 if ( removed_privilege
4020 && (!f.trusted_config || opt_D_used)
4021 && real_uid == exim_uid)
4022 if (deliver_drop_privilege)
4023 f.really_exim = TRUE; /* let logging work normally */
4025 log_write(0, LOG_MAIN|LOG_PANIC,
4026 "exim user lost privilege for using %s option",
4027 f.trusted_config? "-D" : "-C");
4029 /* Start up Perl interpreter if Perl support is configured and there is a
4030 perl_startup option, and the configuration or the command line specifies
4031 initializing starting. Note that the global variables are actually called
4032 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4035 if (perl_start_option != 0)
4036 opt_perl_at_start = (perl_start_option > 0);
4037 if (opt_perl_at_start && opt_perl_startup != NULL)
4040 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4041 if ((errstr = init_perl(opt_perl_startup)))
4042 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4043 opt_perl_started = TRUE;
4045 #endif /* EXIM_PERL */
4047 /* Log the arguments of the call if the configuration file said so. This is
4048 a debugging feature for finding out what arguments certain MUAs actually use.
4049 Don't attempt it if logging is disabled, or if listing variables or if
4050 verifying/testing addresses or expansions. */
4052 if ( (debug_selector & D_any || LOGGING(arguments))
4053 && f.really_exim && !list_options && !checking)
4055 uschar *p = big_buffer;
4056 Ustrcpy(p, US"cwd= (failed)");
4062 Ustrncpy(p + 4, initial_cwd, big_buffer_size-5);
4063 p += 4 + Ustrlen(initial_cwd);
4064 /* in case p is near the end and we don't provide enough space for
4065 * string_format to be willing to write. */
4069 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4071 for (int i = 0; i < argc; i++)
4073 int len = Ustrlen(argv[i]);
4074 const uschar *printing;
4076 if (p + len + 8 >= big_buffer + big_buffer_size)
4078 Ustrcpy(p, US" ...");
4079 log_write(0, LOG_MAIN, "%s", big_buffer);
4080 Ustrcpy(big_buffer, US"...");
4083 printing = string_printing(argv[i]);
4084 if (!*printing) quote = US"\"";
4087 const uschar *pp = printing;
4089 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4091 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4092 (p - big_buffer) - 4), printing, quote);
4095 if (LOGGING(arguments))
4096 log_write(0, LOG_MAIN, "%s", big_buffer);
4098 debug_printf("%s\n", big_buffer);
4101 /* Set the working directory to be the top-level spool directory. We don't rely
4102 on this in the code, which always uses fully qualified names, but it's useful
4103 for core dumps etc. Don't complain if it fails - the spool directory might not
4104 be generally accessible and calls with the -C option (and others) have lost
4105 privilege by now. Before the chdir, we try to ensure that the directory exists.
4108 if (Uchdir(spool_directory) != 0)
4111 (void)directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4112 dummy = /* quieten compiler */ Uchdir(spool_directory);
4113 dummy = dummy; /* yet more compiler quietening, sigh */
4116 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4117 alias file. Exim doesn't have such a concept, but this call is screwed into
4118 Sun's YP makefiles. Handle this by calling a configured script, as the real
4119 user who called Exim. The -oA option can be used to pass an argument to the
4124 (void)fclose(config_file);
4129 argv[i++] = bi_command;
4130 if (alias_arg) argv[i++] = alias_arg;
4133 setgroups(group_count, group_list);
4134 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4136 DEBUG(D_exec) debug_printf("exec %.256s %.256s\n", argv[0],
4137 argv[1] ? argv[1] : US"");
4139 execv(CS argv[0], (char *const *)argv);
4140 exim_fail("exim: exec failed: %s\n", strerror(errno));
4144 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4149 /* We moved the admin/trusted check to be immediately after reading the
4150 configuration file. We leave these prints here to ensure that syslog setup,
4151 logfile setup, and so on has already happened. */
4153 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4154 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4156 /* Only an admin user may start the daemon or force a queue run in the default
4157 configuration, but the queue run restriction can be relaxed. Only an admin
4158 user may request that a message be returned to its sender forthwith. Only an
4159 admin user may specify a debug level greater than D_v (because it might show
4160 passwords, etc. in lookup queries). Only an admin user may request a queue
4161 count. Only an admin user can use the test interface to scan for email
4162 (because Exim will be in the spool dir and able to look at mails). */
4166 BOOL debugset = (debug_selector & ~D_v) != 0;
4167 if ( deliver_give_up || f.daemon_listen || malware_test_file
4168 || count_queue && queue_list_requires_admin
4169 || list_queue && queue_list_requires_admin
4170 || queue_interval >= 0 && prod_requires_admin
4171 || queue_name_dest && prod_requires_admin
4172 || debugset && !f.running_in_test_harness
4174 exim_fail("exim:%s permission denied\n", debugset? " debugging" : "");
4177 /* If the real user is not root or the exim uid, the argument for passing
4178 in an open TCP/IP connection for another message is not permitted, nor is
4179 running with the -N option for any delivery action, unless this call to exim is
4180 one that supplied an input message, or we are using a patched exim for
4181 regression testing. */
4183 if (real_uid != root_uid && real_uid != exim_uid &&
4184 (continue_hostname != NULL ||
4186 (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4187 )) && !f.running_in_test_harness)
4188 exim_fail("exim: Permission denied\n");
4190 /* If the caller is not trusted, certain arguments are ignored when running for
4191 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4192 Note that authority for performing certain actions on messages is tested in the
4193 queue_action() function. */
4195 if (!f.trusted_caller && !checking)
4197 sender_host_name = sender_host_address = interface_address =
4198 sender_ident = received_protocol = NULL;
4199 sender_host_port = interface_port = 0;
4200 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4203 /* If a sender host address is set, extract the optional port number off the
4204 end of it and check its syntax. Do the same thing for the interface address.
4205 Exim exits if the syntax is bad. */
4209 if (sender_host_address != NULL)
4210 sender_host_port = check_port(sender_host_address);
4211 if (interface_address != NULL)
4212 interface_port = check_port(interface_address);
4215 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4218 if (f.trusted_caller)
4220 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4221 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4224 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4227 /* If an SMTP message is being received check to see if the standard input is a
4228 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4229 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4234 union sockaddr_46 inetd_sock;
4235 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4236 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4238 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4239 if (family == AF_INET || family == AF_INET6)
4241 union sockaddr_46 interface_sock;
4242 size = sizeof(interface_sock);
4244 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4245 interface_address = host_ntoa(-1, &interface_sock, NULL,
4248 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4250 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4253 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4254 NULL, &sender_host_port);
4255 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4256 "inetd is not supported when mua_wrapper is set");
4260 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4265 /* If the load average is going to be needed while receiving a message, get it
4266 now for those OS that require the first call to os_getloadavg() to be done as
4267 root. There will be further calls later for each message received. */
4269 #ifdef LOAD_AVG_NEEDS_ROOT
4270 if ( receiving_message
4271 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4272 load_average = OS_GETLOADAVG();
4275 /* The queue_only configuration option can be overridden by -odx on the command
4276 line, except that if queue_only_override is false, queue_only cannot be unset
4277 from the command line. */
4279 if (queue_only_set && (queue_only_override || arg_queue_only))
4280 queue_only = arg_queue_only;
4282 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4285 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4286 if (arg_smtp_receive_timeout >= 0)
4287 smtp_receive_timeout = arg_smtp_receive_timeout;
4289 /* If Exim was started with root privilege, unless we have already removed the
4290 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4291 except when starting the daemon or doing some kind of delivery or address
4292 testing (-bt). These are the only cases when root need to be retained. We run
4293 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4294 retained only for starting the daemon. We always do the initgroups() in this
4295 situation (controlled by the TRUE below), in order to be as close as possible
4296 to the state Exim usually runs in. */
4298 if (!unprivileged && /* originally had root AND */
4299 !removed_privilege && /* still got root AND */
4300 !f.daemon_listen && /* not starting the daemon */
4301 queue_interval <= 0 && /* (either kind of daemon) */
4303 deliver_drop_privilege || /* requested unprivileged */
4305 queue_interval < 0 && /* not running the queue */
4306 (msg_action_arg < 0 || /* and */
4307 msg_action != MSG_DELIVER) && /* not delivering and */
4308 (!checking || !f.address_test_mode) /* not address checking */
4310 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4312 /* When we are retaining a privileged uid, we still change to the exim gid. */
4317 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4318 rv = setgid(exim_gid);
4319 /* Impact of failure is that some stuff might end up with an incorrect group.
4320 We track this for failures from root, since any attempt to change privilege
4321 by root should succeed and failures should be examined. For non-root,
4322 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4323 no need to complain then. */
4325 if (!(unprivileged || removed_privilege))
4326 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4328 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4329 (long int)exim_gid, strerror(errno));
4332 /* Handle a request to scan a file for malware */
4333 if (malware_test_file)
4335 #ifdef WITH_CONTENT_SCAN
4337 set_process_info("scanning file for malware");
4338 result = malware_in_file(malware_test_file);
4341 printf("No malware found.\n");
4346 printf("Malware lookup returned non-okay/fail: %d\n", result);
4350 printf("Malware found: %s\n", malware_name);
4352 printf("Malware scan detected malware of unknown name.\n");
4354 printf("Malware scanning not enabled at compile time.\n");
4359 /* Handle a request to list the delivery queue */
4363 set_process_info("listing the queue");
4364 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4368 /* Handle a request to count the delivery queue */
4372 set_process_info("counting the queue");
4373 fprintf(stdout, "%u\n", queue_count());
4377 /* Handle actions on specific messages, except for the force delivery and
4378 message load actions, which are done below. Some actions take a whole list of
4379 message ids, which are known to continue up to the end of the arguments. Others
4380 take a single message id and then operate on the recipients list. */
4382 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4384 int yield = EXIT_SUCCESS;
4385 set_process_info("acting on specified messages");
4387 /* ACL definitions may be needed when removing a message (-Mrm) because
4388 event_action gets expanded */
4390 if (msg_action == MSG_REMOVE)
4393 if (!one_msg_action)
4395 for (i = msg_action_arg; i < argc; i++)
4396 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4397 yield = EXIT_FAILURE;
4400 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4401 default: printf("\n"); break;
4405 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4406 recipients_arg)) yield = EXIT_FAILURE;
4410 /* We used to set up here to skip reading the ACL section, on
4411 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4412 Now, since the intro of the ${acl } expansion, ACL definitions may be
4413 needed in transports so we lost the optimisation. */
4416 #ifdef MEASURE_TIMING
4417 struct timeval t0, diff;
4418 (void)gettimeofday(&t0, NULL);
4423 #ifdef MEASURE_TIMING
4424 report_time_since(&t0, US"readconf_rest (delta)");
4428 /* Handle the -brt option. This is for checking out retry configurations.
4429 The next three arguments are a domain name or a complete address, and
4430 optionally two error numbers. All it does is to call the function that
4431 scans the retry configuration data. */
4433 if (test_retry_arg >= 0)
4435 retry_config *yield;
4436 int basic_errno = 0;
4440 if (test_retry_arg >= argc)
4442 printf("-brt needs a domain or address argument\n");
4443 exim_exit(EXIT_FAILURE);
4445 s1 = argv[test_retry_arg++];
4448 /* If the first argument contains no @ and no . it might be a local user
4449 or it might be a single-component name. Treat as a domain. */
4451 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4453 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4454 "being \ntreated as a one-component domain, not as a local part.\n\n",
4458 /* There may be an optional second domain arg. */
4460 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4461 s2 = argv[test_retry_arg++];
4463 /* The final arg is an error name */
4465 if (test_retry_arg < argc)
4467 uschar *ss = argv[test_retry_arg];
4469 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4472 printf("%s\n", CS error);
4473 return EXIT_FAILURE;
4476 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4477 code > 100 as an error is for matching codes to the decade. Turn them into
4478 a real error code, off the decade. */
4480 if (basic_errno == ERRNO_MAIL4XX ||
4481 basic_errno == ERRNO_RCPT4XX ||
4482 basic_errno == ERRNO_DATA4XX)
4484 int code = (more_errno >> 8) & 255;
4486 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4487 else if (code > 100)
4488 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4492 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4493 printf("No retry information found\n");
4496 more_errno = yield->more_errno;
4497 printf("Retry rule: %s ", yield->pattern);
4499 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4501 printf("quota%s%s ",
4502 (more_errno > 0)? "_" : "",
4503 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4505 else if (yield->basic_errno == ECONNREFUSED)
4507 printf("refused%s%s ",
4508 (more_errno > 0)? "_" : "",
4509 (more_errno == 'M')? "MX" :
4510 (more_errno == 'A')? "A" : "");
4512 else if (yield->basic_errno == ETIMEDOUT)
4515 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4517 if (more_errno != 0) printf("_%s",
4518 (more_errno == 'M')? "MX" : "A");
4521 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4522 printf("auth_failed ");
4525 for (retry_rule * r = yield->rules; r; r = r->next)
4527 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4528 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4534 printf(",%d.", x/1000);
4548 exim_exit(EXIT_SUCCESS);
4551 /* Handle a request to list one or more configuration options */
4552 /* If -n was set, we suppress some information */
4557 set_process_info("listing variables");
4558 if (recipients_arg >= argc)
4559 fail = !readconf_print(US"all", NULL, flag_n);
4560 else for (i = recipients_arg; i < argc; i++)
4563 (Ustrcmp(argv[i], "router") == 0 ||
4564 Ustrcmp(argv[i], "transport") == 0 ||
4565 Ustrcmp(argv[i], "authenticator") == 0 ||
4566 Ustrcmp(argv[i], "macro") == 0 ||
4567 Ustrcmp(argv[i], "environment") == 0))
4569 fail |= !readconf_print(argv[i+1], argv[i], flag_n);
4573 fail = !readconf_print(argv[i], NULL, flag_n);
4575 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4580 set_process_info("listing config");
4581 exim_exit(readconf_print(US"config", NULL, flag_n)
4582 ? EXIT_SUCCESS : EXIT_FAILURE);
4586 /* Initialise subsystems as required. */
4590 /* Handle a request to deliver one or more messages that are already on the
4591 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4592 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4594 Delivery of specific messages is typically used for a small number when
4595 prodding by hand (when the option forced_delivery will be set) or when
4596 re-execing to regain root privilege. Each message delivery must happen in a
4597 separate process, so we fork a process for each one, and run them sequentially
4598 so that debugging output doesn't get intertwined, and to avoid spawning too
4599 many processes if a long list is given. However, don't fork for the last one;
4600 this saves a process in the common case when Exim is called to deliver just one
4603 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4605 if (prod_requires_admin && !f.admin_user)
4607 fprintf(stderr, "exim: Permission denied\n");
4608 exim_exit(EXIT_FAILURE);
4610 set_process_info("delivering specified messages");
4611 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4612 for (i = msg_action_arg; i < argc; i++)
4616 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4617 that runs into a later copy into the untainted global message_id[] */
4619 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4620 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4622 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4623 exim_underbar_exit(EXIT_SUCCESS);
4627 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4629 exim_exit(EXIT_FAILURE);
4633 exim_exit(EXIT_SUCCESS);
4637 /* If only a single queue run is requested, without SMTP listening, we can just
4638 turn into a queue runner, with an optional starting message id. */
4640 if (queue_interval == 0 && !f.daemon_listen)
4642 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4643 start_queue_run_id ? US" starting at " : US"",
4644 start_queue_run_id ? start_queue_run_id: US"",
4645 stop_queue_run_id ? US" stopping at " : US"",
4646 stop_queue_run_id ? stop_queue_run_id : US"");
4648 set_process_info("running the '%s' queue (single queue run)", queue_name);
4650 set_process_info("running the queue (single queue run)");
4651 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4652 exim_exit(EXIT_SUCCESS);
4656 /* Find the login name of the real user running this process. This is always
4657 needed when receiving a message, because it is written into the spool file. It
4658 may also be used to construct a from: or a sender: header, and in this case we
4659 need the user's full name as well, so save a copy of it, checked for RFC822
4660 syntax and munged if necessary, if it hasn't previously been set by the -F
4661 argument. We may try to get the passwd entry more than once, in case NIS or
4662 other delays are in evidence. Save the home directory for use in filter testing
4667 if ((pw = getpwuid(real_uid)) != NULL)
4669 originator_login = string_copy(US pw->pw_name);
4670 originator_home = string_copy(US pw->pw_dir);
4672 /* If user name has not been set by -F, set it from the passwd entry
4673 unless -f has been used to set the sender address by a trusted user. */
4675 if (!originator_name)
4677 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4679 uschar *name = US pw->pw_gecos;
4680 uschar *amp = Ustrchr(name, '&');
4683 /* Most Unix specify that a '&' character in the gecos field is
4684 replaced by a copy of the login name, and some even specify that
4685 the first character should be upper cased, so that's what we do. */
4690 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4691 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4692 buffer[loffset] = toupper(buffer[loffset]);
4696 /* If a pattern for matching the gecos field was supplied, apply
4697 it and then expand the name string. */
4699 if (gecos_pattern && gecos_name)
4702 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4704 if (regex_match_and_setup(re, name, 0, -1))
4706 uschar *new_name = expand_string(gecos_name);
4710 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4711 "gecos field \"%s\"\n", new_name, name);
4714 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4715 "\"%s\": %s\n", gecos_name, expand_string_message);
4717 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4718 "gecos field \"%s\"\n", gecos_pattern, name);
4719 store_free((void *)re);
4721 originator_name = string_copy(name);
4724 /* A trusted caller has used -f but not -F */
4726 else originator_name = US"";
4729 /* Break the retry loop */
4734 if (++i > finduser_retries) break;
4738 /* If we cannot get a user login, log the incident and give up, unless the
4739 configuration specifies something to use. When running in the test harness,
4740 any setting of unknown_login overrides the actual name. */
4742 if (originator_login == NULL || f.running_in_test_harness)
4744 if (unknown_login != NULL)
4746 originator_login = expand_string(unknown_login);
4747 if (originator_name == NULL && unknown_username != NULL)
4748 originator_name = expand_string(unknown_username);
4749 if (originator_name == NULL) originator_name = US"";
4751 if (originator_login == NULL)
4752 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4756 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4759 originator_name = string_copy(parse_fix_phrase(originator_name,
4760 Ustrlen(originator_name), big_buffer, big_buffer_size));
4762 /* If a message is created by this call of Exim, the uid/gid of its originator
4763 are those of the caller. These values are overridden if an existing message is
4764 read in from the spool. */
4766 originator_uid = real_uid;
4767 originator_gid = real_gid;
4769 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4770 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4772 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4773 returns. We leave this till here so that the originator_ fields are available
4774 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4777 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4781 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4782 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4783 "mua_wrapper is set");
4786 # ifndef DISABLE_TLS
4787 /* This also checks that the library linkage is working and we can call
4788 routines in it, so call even if tls_require_ciphers is unset */
4790 # ifdef MEASURE_TIMING
4791 struct timeval t0, diff;
4792 (void)gettimeofday(&t0, NULL);
4794 if (!tls_dropprivs_validate_require_cipher(FALSE))
4796 # ifdef MEASURE_TIMING
4797 report_time_since(&t0, US"validate_ciphers (delta)");
4805 /* If the sender ident has not been set (by a trusted caller) set it to
4806 the caller. This will get overwritten below for an inetd call. If a trusted
4807 caller has set it empty, unset it. */
4809 if (!sender_ident) sender_ident = originator_login;
4810 else if (!*sender_ident) sender_ident = NULL;
4812 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4813 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4814 originator_* variables set. */
4816 if (test_rewrite_arg >= 0)
4818 f.really_exim = FALSE;
4819 if (test_rewrite_arg >= argc)
4821 printf("-brw needs an address argument\n");
4822 exim_exit(EXIT_FAILURE);
4824 rewrite_test(argv[test_rewrite_arg]);
4825 exim_exit(EXIT_SUCCESS);
4828 /* A locally-supplied message is considered to be coming from a local user
4829 unless a trusted caller supplies a sender address with -f, or is passing in the
4830 message via SMTP (inetd invocation or otherwise). */
4832 if ( !sender_address && !smtp_input
4833 || !f.trusted_caller && filter_test == FTEST_NONE)
4835 f.sender_local = TRUE;
4837 /* A trusted caller can supply authenticated_sender and authenticated_id
4838 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4839 defaults except when host checking. */
4841 if (!authenticated_sender && !host_checking)
4842 authenticated_sender = string_sprintf("%s@%s", originator_login,
4843 qualify_domain_sender);
4844 if (!authenticated_id && !host_checking)
4845 authenticated_id = originator_login;
4848 /* Trusted callers are always permitted to specify the sender address.
4849 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4850 is specified is the empty address. However, if a trusted caller does not
4851 specify a sender address for SMTP input, we leave sender_address unset. This
4852 causes the MAIL commands to be honoured. */
4854 if ( !smtp_input && !sender_address
4855 || !receive_check_set_sender(sender_address))
4857 /* Either the caller is not permitted to set a general sender, or this is
4858 non-SMTP input and the trusted caller has not set a sender. If there is no
4859 sender, or if a sender other than <> is set, override with the originator's
4860 login (which will get qualified below), except when checking things. */
4862 if (sender_address == NULL /* No sender_address set */
4864 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4865 !checking)) /* Not running tests, including filter tests */
4867 sender_address = originator_login;
4868 f.sender_address_forced = FALSE;
4869 sender_address_domain = 0;
4873 /* Remember whether an untrusted caller set the sender address */
4875 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
4877 /* Ensure that the sender address is fully qualified unless it is the empty
4878 address, which indicates an error message, or doesn't exist (root caller, smtp
4879 interface, no -f argument). */
4881 if (sender_address && *sender_address && sender_address_domain == 0)
4882 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
4883 qualify_domain_sender);
4885 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
4887 /* Handle a request to verify a list of addresses, or test them for delivery.
4888 This must follow the setting of the sender address, since routers can be
4889 predicated upon the sender. If no arguments are given, read addresses from
4890 stdin. Set debug_level to at least D_v to get full output for address testing.
4893 if (verify_address_mode || f.address_test_mode)
4896 int flags = vopt_qualify;
4898 if (verify_address_mode)
4900 if (!verify_as_sender) flags |= vopt_is_recipient;
4901 DEBUG(D_verify) debug_print_ids(US"Verifying:");
4906 flags |= vopt_is_recipient;
4907 debug_selector |= D_v;
4908 debug_file = stderr;
4909 debug_fd = fileno(debug_file);
4910 DEBUG(D_verify) debug_print_ids(US"Address testing:");
4913 if (recipients_arg < argc)
4915 while (recipients_arg < argc)
4917 /* Supplied addresses are tainted since they come from a user */
4918 uschar * s = string_copy_taint(argv[recipients_arg++], TRUE);
4921 BOOL finished = FALSE;
4922 uschar *ss = parse_find_address_end(s, FALSE);
4923 if (*ss == ',') *ss = 0; else finished = TRUE;
4924 test_address(s, flags, &exit_value);
4927 while (*++s == ',' || isspace(*s)) ;
4934 uschar * s = get_stdinput(NULL, NULL);
4936 test_address(string_copy_taint(s, TRUE), flags, &exit_value);
4940 exim_exit(exit_value);
4943 /* Handle expansion checking. Either expand items on the command line, or read
4944 from stdin if there aren't any. If -Mset was specified, load the message so
4945 that its variables can be used, but restrict this facility to admin users.
4946 Otherwise, if -bem was used, read a message from stdin. */
4950 dns_init(FALSE, FALSE, FALSE);
4951 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
4953 uschar spoolname[256]; /* Not big_buffer; used in spool_read_header() */
4955 exim_fail("exim: permission denied\n");
4956 message_id = argv[msg_action_arg];
4957 (void)string_format(spoolname, sizeof(spoolname), "%s-H", message_id);
4958 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
4959 printf ("Failed to load message datafile %s\n", message_id);
4960 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
4961 printf ("Failed to load message %s\n", message_id);
4964 /* Read a test message from a file. We fudge it up to be on stdin, saving
4965 stdin itself for later reading of expansion strings. */
4967 else if (expansion_test_message)
4969 int save_stdin = dup(0);
4970 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
4972 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
4975 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
4976 message_ended = END_NOTENDED;
4977 read_message_body(receive_msg(extract_recipients));
4978 message_linecount += body_linecount;
4979 (void)dup2(save_stdin, 0);
4980 (void)close(save_stdin);
4981 clearerr(stdin); /* Required by Darwin */
4984 /* Only admin users may see config-file macros this way */
4986 if (!f.admin_user) macros_user = macros = mlast = NULL;
4988 /* Allow $recipients for this testing */
4990 f.enable_dollar_recipients = TRUE;
4992 /* Expand command line items */
4994 if (recipients_arg < argc)
4995 while (recipients_arg < argc)
4996 expansion_test_line(argv[recipients_arg++]);
5002 char *(*fn_readline)(const char *) = NULL;
5003 void (*fn_addhist)(const char *) = NULL;
5007 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5010 while (s = get_stdinput(fn_readline, fn_addhist))
5011 expansion_test_line(s);
5014 if (dlhandle) dlclose(dlhandle);
5018 /* The data file will be open after -Mset */
5020 if (deliver_datafile >= 0)
5022 (void)close(deliver_datafile);
5023 deliver_datafile = -1;
5026 exim_exit(EXIT_SUCCESS);
5030 /* The active host name is normally the primary host name, but it can be varied
5031 for hosts that want to play several parts at once. We need to ensure that it is
5032 set for host checking, and for receiving messages. */
5034 smtp_active_hostname = primary_hostname;
5035 if (raw_active_hostname != NULL)
5037 uschar *nah = expand_string(raw_active_hostname);
5040 if (!f.expand_string_forcedfail)
5041 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5042 "(smtp_active_hostname): %s", raw_active_hostname,
5043 expand_string_message);
5045 else if (nah[0] != 0) smtp_active_hostname = nah;
5048 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5049 given IP address so that the blocking and relay configuration can be tested.
5050 Unless a sender_ident was set by -oMt, we discard it (the default is the
5051 caller's login name). An RFC 1413 call is made only if we are running in the
5052 test harness and an incoming interface and both ports are specified, because
5053 there is no TCP/IP call to find the ident for. */
5060 if (!sender_ident_set)
5062 sender_ident = NULL;
5063 if (f.running_in_test_harness && sender_host_port
5064 && interface_address && interface_port)
5065 verify_get_ident(1223); /* note hardwired port number */
5068 /* In case the given address is a non-canonical IPv6 address, canonicalize
5069 it. The code works for both IPv4 and IPv6, as it happens. */
5071 size = host_aton(sender_host_address, x);
5072 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5073 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5075 /* Now set up for testing */
5077 host_build_sender_fullhost();
5081 f.sender_local = FALSE;
5082 f.sender_host_notsocket = TRUE;
5083 debug_file = stderr;
5084 debug_fd = fileno(debug_file);
5085 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5086 "**** but without any ident (RFC 1413) callback.\n"
5087 "**** This is not for real!\n\n",
5088 sender_host_address);
5090 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5091 if (verify_check_host(&hosts_connection_nolog) == OK)
5092 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5093 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5095 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5096 because a log line has already been written for all its failure exists
5097 (usually "connection refused: <reason>") and writing another one is
5098 unnecessary clutter. */
5100 if (smtp_start_session())
5103 for (; (reset_point = store_mark()); store_reset(reset_point))
5105 if (smtp_setup_msg() <= 0) break;
5106 if (!receive_msg(FALSE)) break;
5108 return_path = sender_address = NULL;
5109 dnslist_domain = dnslist_matched = NULL;
5110 #ifndef DISABLE_DKIM
5111 dkim_cur_signer = NULL;
5114 deliver_localpart_orig = NULL;
5115 deliver_domain_orig = NULL;
5116 callout_address = sending_ip_address = NULL;
5117 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5121 exim_exit(EXIT_SUCCESS);
5125 /* Arrange for message reception if recipients or SMTP were specified;
5126 otherwise complain unless a version print (-bV) happened or this is a filter
5127 verification test or info dump.
5128 In the former case, show the configuration file name. */
5130 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5132 if (version_printed)
5134 if (Ustrchr(config_main_filelist, ':'))
5135 printf("Configuration file search path is %s\n", config_main_filelist);
5136 printf("Configuration file is %s\n", config_main_filename);
5137 return EXIT_SUCCESS;
5140 if (info_flag != CMDINFO_NONE)
5142 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5143 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5146 if (filter_test == FTEST_NONE)
5147 exim_usage(called_as);
5151 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5152 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5153 that we are not called from inetd, because that is rejected above. The
5154 following configuration settings are forced here:
5156 (1) Synchronous delivery (-odi)
5157 (2) Errors to stderr (-oep == -oeq)
5158 (3) No parallel remote delivery
5159 (4) Unprivileged delivery
5161 We don't force overall queueing options because there are several of them;
5162 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5163 to override any SMTP queueing. */
5167 f.synchronous_delivery = TRUE;
5168 arg_error_handling = ERRORS_STDERR;
5169 remote_max_parallel = 1;
5170 deliver_drop_privilege = TRUE;
5171 f.queue_smtp = FALSE;
5172 queue_smtp_domains = NULL;
5174 message_utf8_downconvert = -1; /* convert-if-needed */
5179 /* Prepare to accept one or more new messages on the standard input. When a
5180 message has been read, its id is returned in message_id[]. If doing immediate
5181 delivery, we fork a delivery process for each received message, except for the
5182 last one, where we can save a process switch.
5184 It is only in non-smtp mode that error_handling is allowed to be changed from
5185 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5186 sendmail error modes other than -oem ever actually used? Later: yes.) */
5188 if (!smtp_input) error_handling = arg_error_handling;
5190 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5191 logging being sent down the socket and make an identd call to get the
5194 else if (f.is_inetd)
5196 (void)fclose(stderr);
5197 exim_nullstd(); /* Re-open to /dev/null */
5198 verify_get_ident(IDENT_PORT);
5199 host_build_sender_fullhost();
5200 set_process_info("handling incoming connection from %s via inetd",
5204 /* If the sender host address has been set, build sender_fullhost if it hasn't
5205 already been done (which it will have been for inetd). This caters for the
5206 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5207 so that the test for IP options is skipped for -bs input. */
5209 if (sender_host_address && !sender_fullhost)
5211 host_build_sender_fullhost();
5212 set_process_info("handling incoming connection from %s via -oMa",
5214 f.sender_host_notsocket = TRUE;
5217 /* Otherwise, set the sender host as unknown except for inetd calls. This
5218 prevents host checking in the case of -bs not from inetd and also for -bS. */
5220 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5222 /* If stdout does not exist, then dup stdin to stdout. This can happen
5223 if exim is started from inetd. In this case fd 0 will be set to the socket,
5224 but fd 1 will not be set. This also happens for passed SMTP channels. */
5226 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5228 /* Set up the incoming protocol name and the state of the program. Root is
5229 allowed to force received protocol via the -oMr option above. If we have come
5230 via inetd, the process info has already been set up. We don't set
5231 received_protocol here for smtp input, as it varies according to
5232 batch/HELO/EHLO/AUTH/TLS. */
5236 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5237 smtp_batched_input? "batched " : "",
5238 (sender_address!= NULL)? sender_address : originator_login);
5242 int old_pool = store_pool;
5243 store_pool = POOL_PERM;
5244 if (!received_protocol)
5245 received_protocol = string_sprintf("local%s", called_as);
5246 store_pool = old_pool;
5247 set_process_info("accepting a local non-SMTP message from <%s>",
5251 /* Initialize the session_local_queue-only flag (this will be ignored if
5252 mua_wrapper is set) */
5255 session_local_queue_only = queue_only;
5257 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5258 the spool if so configured. On failure, we must not attempt to send an error
5259 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5260 error code is given.) */
5262 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5263 exim_fail("exim: insufficient disk space\n");
5265 /* If this is smtp input of any kind, real or batched, handle the start of the
5268 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5269 because a log line has already been written for all its failure exists
5270 (usually "connection refused: <reason>") and writing another one is
5271 unnecessary clutter. */
5277 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5278 if (verify_check_host(&hosts_connection_nolog) == OK)
5279 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5280 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5281 if (!smtp_start_session())
5284 exim_exit(EXIT_SUCCESS);
5288 /* Otherwise, set up the input size limit here. */
5292 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5293 if (expand_string_message)
5294 if (thismessage_size_limit == -1)
5295 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5296 "message_size_limit: %s", expand_string_message);
5298 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5299 "message_size_limit: %s", expand_string_message);
5302 /* Loop for several messages when reading SMTP input. If we fork any child
5303 processes, we don't want to wait for them unless synchronous delivery is
5304 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5305 same as SIG_DFL, despite the fact that documentation often lists the default as
5306 "ignore". This is a confusing area. This is what I know:
5308 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5309 processes that complete simply to go away without ever becoming defunct. You
5310 can't then wait for them - but we don't want to wait for them in the
5311 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5312 happen for all OS (e.g. *BSD is different).
5314 But that's not the end of the story. Some (many? all?) systems have the
5315 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5316 has by default, so it seems that the difference is merely one of default
5317 (compare restarting vs non-restarting signals).
5319 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5320 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5321 of the loop below. Paranoia rules.
5323 February 2003: That's *still* not the end of the story. There are now versions
5324 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5325 process then calls waitpid(), a grumble is written to the system log, because
5326 this is logically inconsistent. In other words, it doesn't like the paranoia.
5327 As a consequence of this, the waitpid() below is now excluded if we are sure
5328 that SIG_IGN works. */
5330 if (!f.synchronous_delivery)
5333 struct sigaction act;
5334 act.sa_handler = SIG_IGN;
5335 sigemptyset(&(act.sa_mask));
5336 act.sa_flags = SA_NOCLDWAIT;
5337 sigaction(SIGCHLD, &act, NULL);
5339 signal(SIGCHLD, SIG_IGN);
5343 /* Save the current store pool point, for resetting at the start of
5344 each message, and save the real sender address, if any. */
5346 real_sender_address = sender_address;
5348 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5349 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5354 rmark reset_point = store_mark();
5357 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5358 input and build the recipients list, before calling receive_msg() to read the
5359 message proper. Whatever sender address is given in the SMTP transaction is
5360 often ignored for local senders - we use the actual sender, which is normally
5361 either the underlying user running this process or a -f argument provided by
5362 a trusted caller. It is saved in real_sender_address. The test for whether to
5363 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5368 if ((rc = smtp_setup_msg()) > 0)
5370 if (real_sender_address != NULL &&
5371 !receive_check_set_sender(sender_address))
5373 sender_address = raw_sender = real_sender_address;
5374 sender_address_unrewritten = NULL;
5377 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5378 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5379 the very end. The result of the ACL is ignored (as for other non-SMTP
5380 messages). It is run for its potential side effects. */
5382 if (smtp_batched_input && acl_not_smtp_start != NULL)
5384 uschar *user_msg, *log_msg;
5385 f.enable_dollar_recipients = TRUE;
5386 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5387 &user_msg, &log_msg);
5388 f.enable_dollar_recipients = FALSE;
5391 /* Now get the data for the message */
5393 more = receive_msg(extract_recipients);
5394 if (message_id[0] == 0)
5396 cancel_cutthrough_connection(TRUE, US"receive dropped");
5397 if (more) goto moreloop;
5398 smtp_log_no_mail(); /* Log no mail if configured */
5399 exim_exit(EXIT_FAILURE);
5404 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5405 smtp_log_no_mail(); /* Log no mail if configured */
5406 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5410 /* In the non-SMTP case, we have all the information from the command
5411 line, but must process it in case it is in the more general RFC822
5412 format, and in any case, to detect syntax errors. Also, it appears that
5413 the use of comma-separated lists as single arguments is common, so we
5414 had better support them. */
5419 int count = argc - recipients_arg;
5420 uschar **list = argv + recipients_arg;
5422 /* These options cannot be changed dynamically for non-SMTP messages */
5424 f.active_local_sender_retain = local_sender_retain;
5425 f.active_local_from_check = local_from_check;
5427 /* Save before any rewriting */
5429 raw_sender = string_copy(sender_address);
5431 /* Loop for each argument (supplied by user hence tainted) */
5433 for (int i = 0; i < count; i++)
5435 int start, end, domain;
5437 uschar * s = string_copy_taint(list[i], TRUE);
5439 /* Loop for each comma-separated address */
5443 BOOL finished = FALSE;
5445 uschar *ss = parse_find_address_end(s, FALSE);
5447 if (*ss == ',') *ss = 0; else finished = TRUE;
5449 /* Check max recipients - if -t was used, these aren't recipients */
5451 if (recipients_max > 0 && ++rcount > recipients_max &&
5452 !extract_recipients)
5453 if (error_handling == ERRORS_STDERR)
5455 fprintf(stderr, "exim: too many recipients\n");
5456 exim_exit(EXIT_FAILURE);
5460 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5461 errors_sender_rc : EXIT_FAILURE;
5465 BOOL b = allow_utf8_domains;
5466 allow_utf8_domains = TRUE;
5469 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5472 if (string_is_utf8(recipient))
5473 message_smtputf8 = TRUE;
5475 allow_utf8_domains = b;
5478 if (domain == 0 && !f.allow_unqualified_recipient)
5481 errmess = US"unqualified recipient address not allowed";
5485 if (error_handling == ERRORS_STDERR)
5487 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5488 string_printing(list[i]), errmess);
5489 exim_exit(EXIT_FAILURE);
5495 eblock.text1 = string_printing(list[i]);
5496 eblock.text2 = errmess;
5498 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5499 errors_sender_rc : EXIT_FAILURE;
5502 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5505 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5509 /* Show the recipients when debugging */
5513 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5514 if (recipients_list)
5516 debug_printf("Recipients:\n");
5517 for (int i = 0; i < recipients_count; i++)
5518 debug_printf(" %s\n", recipients_list[i].address);
5522 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5523 ignored; rejecting here would just add complication, and it can just as
5524 well be done later. Allow $recipients to be visible in the ACL. */
5526 if (acl_not_smtp_start)
5528 uschar *user_msg, *log_msg;
5529 f.enable_dollar_recipients = TRUE;
5530 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5531 &user_msg, &log_msg);
5532 f.enable_dollar_recipients = FALSE;
5535 /* Pause for a while waiting for input. If none received in that time,
5536 close the logfile, if we had one open; then if we wait for a long-running
5537 datasource (months, in one use-case) log rotation will not leave us holding
5540 if (!receive_timeout)
5542 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5545 FD_ZERO(&r); FD_SET(0, &r);
5546 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5549 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5550 will just read the headers for the message, and not write anything onto the
5553 message_ended = END_NOTENDED;
5554 more = receive_msg(extract_recipients);
5556 /* more is always FALSE here (not SMTP message) when reading a message
5557 for real; when reading the headers of a message for filter testing,
5558 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5560 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5561 } /* Non-SMTP message reception */
5563 /* If this is a filter testing run, there are headers in store, but
5564 no message on the spool. Run the filtering code in testing mode, setting
5565 the domain to the qualify domain and the local part to the current user,
5566 unless they have been set by options. The prefix and suffix are left unset
5567 unless specified. The the return path is set to to the sender unless it has
5568 already been set from a return-path header in the message. */
5570 if (filter_test != FTEST_NONE)
5572 deliver_domain = (ftest_domain != NULL)?
5573 ftest_domain : qualify_domain_recipient;
5574 deliver_domain_orig = deliver_domain;
5575 deliver_localpart = (ftest_localpart != NULL)?
5576 ftest_localpart : originator_login;
5577 deliver_localpart_orig = deliver_localpart;
5578 deliver_localpart_prefix = ftest_prefix;
5579 deliver_localpart_suffix = ftest_suffix;
5580 deliver_home = originator_home;
5582 if (return_path == NULL)
5584 printf("Return-path copied from sender\n");
5585 return_path = string_copy(sender_address);
5588 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5589 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5591 receive_add_recipient(
5592 string_sprintf("%s%s%s@%s",
5593 (ftest_prefix == NULL)? US"" : ftest_prefix,
5595 (ftest_suffix == NULL)? US"" : ftest_suffix,
5596 deliver_domain), -1);
5598 printf("Recipient = %s\n", recipients_list[0].address);
5599 if (ftest_prefix != NULL) printf("Prefix = %s\n", ftest_prefix);
5600 if (ftest_suffix != NULL) printf("Suffix = %s\n", ftest_suffix);
5602 if (chdir("/")) /* Get away from wherever the user is running this from */
5604 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5605 exim_exit(EXIT_FAILURE);
5608 /* Now we run either a system filter test, or a user filter test, or both.
5609 In the latter case, headers added by the system filter will persist and be
5610 available to the user filter. We need to copy the filter variables
5613 if ((filter_test & FTEST_SYSTEM) != 0)
5614 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5615 exim_exit(EXIT_FAILURE);
5617 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5619 if ((filter_test & FTEST_USER) != 0)
5620 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5621 exim_exit(EXIT_FAILURE);
5623 exim_exit(EXIT_SUCCESS);
5626 /* Else act on the result of message reception. We should not get here unless
5627 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5628 will be TRUE. If it is not, check on the number of messages received in this
5631 if (!session_local_queue_only &&
5632 smtp_accept_queue_per_connection > 0 &&
5633 receive_messagecount > smtp_accept_queue_per_connection)
5635 session_local_queue_only = TRUE;
5636 queue_only_reason = 2;
5639 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5640 and queue_only_load is set, check that the load average is below it. If it is
5641 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5642 default), we put the whole session into queue_only mode. It then remains this
5643 way for any subsequent messages on the same SMTP connection. This is a
5644 deliberate choice; even though the load average may fall, it doesn't seem
5645 right to deliver later messages on the same call when not delivering earlier
5646 ones. However, there are odd cases where this is not wanted, so this can be
5647 changed by setting queue_only_load_latch false. */
5649 local_queue_only = session_local_queue_only;
5650 if (!local_queue_only && queue_only_load >= 0)
5652 local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load;
5653 if (local_queue_only)
5655 queue_only_reason = 3;
5656 if (queue_only_load_latch) session_local_queue_only = TRUE;
5660 /* If running as an MUA wrapper, all queueing options and freezing options
5664 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5666 /* Log the queueing here, when it will get a message id attached, but
5667 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5670 if (local_queue_only)
5672 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5673 switch(queue_only_reason)
5676 log_write(L_delay_delivery,
5677 LOG_MAIN, "no immediate delivery: more than %d messages "
5678 "received in one connection", smtp_accept_queue_per_connection);
5682 log_write(L_delay_delivery,
5683 LOG_MAIN, "no immediate delivery: load average %.2f",
5684 (double)load_average/1000.0);
5689 else if (f.queue_only_policy || f.deliver_freeze)
5690 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5692 /* Else do the delivery unless the ACL or local_scan() called for queue only
5693 or froze the message. Always deliver in a separate process. A fork failure is
5694 not a disaster, as the delivery will eventually happen on a subsequent queue
5695 run. The search cache must be tidied before the fork, as the parent will
5696 do it before exiting. The child will trigger a lookup failure and
5697 thereby defer the delivery if it tries to use (for example) a cached ldap
5698 connection that the parent has called unbind on. */
5705 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5708 close_unwanted(); /* Close unwanted file descriptors and TLS */
5709 exim_nullstd(); /* Ensure std{in,out,err} exist */
5711 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5712 mode, deliver_drop_privilege is forced TRUE). */
5714 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5716 delivery_re_exec(CEE_EXEC_EXIT);
5717 /* Control does not return here. */
5720 /* No need to re-exec */
5722 rc = deliver_message(message_id, FALSE, FALSE);
5724 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5725 ? EXIT_SUCCESS : EXIT_FAILURE);
5730 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5731 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5732 "process: %s", strerror(errno));
5736 release_cutthrough_connection(US"msg passed for delivery");
5738 /* In the parent, wait if synchronous delivery is required. This will
5739 always be the case in MUA wrapper mode. */
5741 if (f.synchronous_delivery)
5744 while (wait(&status) != pid);
5745 if ((status & 0x00ff) != 0)
5746 log_write(0, LOG_MAIN|LOG_PANIC,
5747 "process %d crashed with signal %d while delivering %s",
5748 (int)pid, status & 0x00ff, message_id);
5749 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5754 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5755 automatically reaps children (see comments above the loop), clear away any
5756 finished subprocesses here, in case there are lots of messages coming in
5757 from the same source. */
5759 #ifndef SIG_IGN_WORKS
5760 while (waitpid(-1, NULL, WNOHANG) > 0);
5764 return_path = sender_address = NULL;
5765 authenticated_sender = NULL;
5766 deliver_localpart_orig = NULL;
5767 deliver_domain_orig = NULL;
5768 deliver_host = deliver_host_address = NULL;
5769 dnslist_domain = dnslist_matched = NULL;
5770 #ifdef WITH_CONTENT_SCAN
5771 malware_name = NULL;
5773 callout_address = NULL;
5774 sending_ip_address = NULL;
5776 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5778 store_reset(reset_point);
5781 exim_exit(EXIT_SUCCESS); /* Never returns */
5782 return 0; /* To stop compiler warning */