1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void * block) {}
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void * block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /***********************************************
215 * Handler for SIGSEGV *
216 ***********************************************/
219 segv_handler(int sig)
221 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
222 signal(SIGSEGV, SIG_DFL);
227 /*************************************************
228 * Handler for SIGUSR1 *
229 *************************************************/
231 /* SIGUSR1 causes any exim process to write to the process log details of
232 what it is currently doing. It will only be used if the OS is capable of
233 setting up a handler that causes automatic restarting of any system call
234 that is in progress at the time.
236 This function takes care to be signal-safe.
238 Argument: the signal number (SIGUSR1)
243 usr1_handler(int sig)
247 os_restarting_signal(sig, usr1_handler);
249 if (!process_log_path) return;
250 fd = log_open_as_exim(process_log_path);
252 /* If we are neither exim nor root, or if we failed to create the log file,
253 give up. There is not much useful we can do with errors, since we don't want
254 to disrupt whatever is going on outside the signal handler. */
258 (void)write(fd, process_info, process_info_len);
264 /*************************************************
266 *************************************************/
268 /* This handler is enabled most of the time that Exim is running. The handler
269 doesn't actually get used unless alarm() has been called to set a timer, to
270 place a time limit on a system call of some kind. When the handler is run, it
273 There are some other SIGALRM handlers that are used in special cases when more
274 than just a flag setting is required; for example, when reading a message's
275 input. These are normally set up in the code module that uses them, and the
276 SIGALRM handler is reset to this one afterwards.
278 Argument: the signal value (SIGALRM)
283 sigalrm_handler(int sig)
286 os_non_restarting_signal(SIGALRM, sigalrm_handler);
291 /*************************************************
292 * Sleep for a fractional time interval *
293 *************************************************/
295 /* This function is called by millisleep() and exim_wait_tick() to wait for a
296 period of time that may include a fraction of a second. The coding is somewhat
297 tedious. We do not expect setitimer() ever to fail, but if it does, the process
298 will wait for ever, so we panic in this instance. (There was a case of this
299 when a bug in a function that calls milliwait() caused it to pass invalid data.
300 That's when I added the check. :-)
302 We assume it to be not worth sleeping for under 50us; this value will
303 require revisiting as hardware advances. This avoids the issue of
304 a zero-valued timer setting meaning "never fire".
306 Argument: an itimerval structure containing the interval
311 milliwait(struct itimerval *itval)
314 sigset_t old_sigmask;
315 int save_errno = errno;
317 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
319 (void)sigemptyset(&sigmask); /* Empty mask */
320 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
321 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
322 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
323 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
324 "setitimer() failed: %s", strerror(errno));
325 (void)sigfillset(&sigmask); /* All signals */
326 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
327 (void)sigsuspend(&sigmask); /* Until SIGALRM */
328 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
330 sigalrm_seen = FALSE;
336 /*************************************************
337 * Millisecond sleep function *
338 *************************************************/
340 /* The basic sleep() function has a granularity of 1 second, which is too rough
341 in some cases - for example, when using an increasing delay to slow down
344 Argument: number of millseconds
351 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
352 .it_value = {.tv_sec = msec/1000,
353 .tv_usec = (msec % 1000) * 1000}};
359 /*************************************************
360 * Compare microsecond times *
361 *************************************************/
368 Returns: -1, 0, or +1
372 exim_tvcmp(struct timeval *t1, struct timeval *t2)
374 if (t1->tv_sec > t2->tv_sec) return +1;
375 if (t1->tv_sec < t2->tv_sec) return -1;
376 if (t1->tv_usec > t2->tv_usec) return +1;
377 if (t1->tv_usec < t2->tv_usec) return -1;
384 /*************************************************
385 * Clock tick wait function *
386 *************************************************/
388 #ifdef _POSIX_MONOTONIC_CLOCK
389 # ifdef CLOCK_BOOTTIME
390 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
392 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
395 /* Amount EXIM_CLOCK is behind realtime, at startup. */
396 static struct timespec offset_ts;
399 exim_clock_init(void)
402 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
403 (void)gettimeofday(&tv, NULL);
404 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
405 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
406 if (offset_ts.tv_nsec >= 0) return;
408 offset_ts.tv_nsec += 1000*1000*1000;
414 exim_gettime(struct timeval * tv)
416 #ifdef _POSIX_MONOTONIC_CLOCK
417 struct timespec now_ts;
419 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
421 now_ts.tv_sec += offset_ts.tv_sec;
422 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
425 now_ts.tv_nsec -= 1000*1000*1000;
427 tv->tv_sec = now_ts.tv_sec;
428 tv->tv_usec = now_ts.tv_nsec / 1000;
432 (void)gettimeofday(tv, NULL);
436 /* Exim uses a time + a pid to generate a unique identifier in two places: its
437 message IDs, and in file names for maildir deliveries. Because some OS now
438 re-use pids within the same second, sub-second times are now being used.
439 However, for absolute certainty, we must ensure the clock has ticked before
440 allowing the relevant process to complete. At the time of implementation of
441 this code (February 2003), the speed of processors is such that the clock will
442 invariably have ticked already by the time a process has done its job. This
443 function prepares for the time when things are faster - and it also copes with
444 clocks that go backwards.
447 prev_tv A timeval which was used to create uniqueness; its usec field
448 has been rounded down to the value of the resolution.
449 We want to be sure the current time is greater than this.
450 On return, updated to current (rounded down).
451 resolution The resolution that was used to divide the microseconds
452 (1 for maildir, larger for message ids)
458 exim_wait_tick(struct timeval * prev_tv, int resolution)
460 struct timeval now_tv;
461 long int now_true_usec;
463 exim_gettime(&now_tv);
464 now_true_usec = now_tv.tv_usec;
465 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
467 while (exim_tvcmp(&now_tv, prev_tv) <= 0)
469 struct itimerval itval;
470 itval.it_interval.tv_sec = 0;
471 itval.it_interval.tv_usec = 0;
472 itval.it_value.tv_sec = prev_tv->tv_sec - now_tv.tv_sec;
473 itval.it_value.tv_usec = prev_tv->tv_usec + resolution - now_true_usec;
475 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
476 negative value for the microseconds is possible only in the case when "now"
477 is more than a second less than "tgt". That means that itval.it_value.tv_sec
478 is greater than zero. The following correction is therefore safe. */
480 if (itval.it_value.tv_usec < 0)
482 itval.it_value.tv_usec += 1000000;
483 itval.it_value.tv_sec -= 1;
486 DEBUG(D_transport|D_receive)
488 if (!f.running_in_test_harness)
490 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
491 prev_tv->tv_sec, (long) prev_tv->tv_usec,
492 now_tv.tv_sec, (long) now_tv.tv_usec);
493 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
494 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
500 /* Be prapared to go around if the kernel does not implement subtick
501 granularity (GNU Hurd) */
503 exim_gettime(&now_tv);
504 now_true_usec = now_tv.tv_usec;
505 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
513 /*************************************************
514 * Call fopen() with umask 777 and adjust mode *
515 *************************************************/
517 /* Exim runs with umask(0) so that files created with open() have the mode that
518 is specified in the open() call. However, there are some files, typically in
519 the spool directory, that are created with fopen(). They end up world-writeable
520 if no precautions are taken. Although the spool directory is not accessible to
521 the world, this is an untidiness. So this is a wrapper function for fopen()
522 that sorts out the mode of the created file.
525 filename the file name
526 options the fopen() options
527 mode the required mode
529 Returns: the fopened FILE or NULL
533 modefopen(const uschar *filename, const char *options, mode_t mode)
535 mode_t saved_umask = umask(0777);
536 FILE *f = Ufopen(filename, options);
537 (void)umask(saved_umask);
538 if (f != NULL) (void)fchmod(fileno(f), mode);
543 /*************************************************
544 * Ensure stdin, stdout, and stderr exist *
545 *************************************************/
547 /* Some operating systems grumble if an exec() happens without a standard
548 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
549 file will be opened and will use these fd values, and then some other bit of
550 code will assume, for example, that it can write error messages to stderr.
551 This function ensures that fds 0, 1, and 2 are open if they do not already
552 exist, by connecting them to /dev/null.
554 This function is also used to ensure that std{in,out,err} exist at all times,
555 so that if any library that Exim calls tries to use them, it doesn't crash.
566 for (int i = 0; i <= 2; i++)
568 if (fstat(i, &statbuf) < 0 && errno == EBADF)
570 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
571 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
572 string_open_failed("/dev/null", NULL));
573 if (devnull != i) (void)dup2(devnull, i);
576 if (devnull > 2) (void)close(devnull);
582 /*************************************************
583 * Close unwanted file descriptors for delivery *
584 *************************************************/
586 /* This function is called from a new process that has been forked to deliver
587 an incoming message, either directly, or using exec.
589 We want any smtp input streams to be closed in this new process. However, it
590 has been observed that using fclose() here causes trouble. When reading in -bS
591 input, duplicate copies of messages have been seen. The files will be sharing a
592 file pointer with the parent process, and it seems that fclose() (at least on
593 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
594 least sometimes. Hence we go for closing the underlying file descriptors.
596 If TLS is active, we want to shut down the TLS library, but without molesting
597 the parent's SSL connection.
599 For delivery of a non-SMTP message, we want to close stdin and stdout (and
600 stderr unless debugging) because the calling process might have set them up as
601 pipes and be waiting for them to close before it waits for the submission
602 process to terminate. If they aren't closed, they hold up the calling process
603 until the initial delivery process finishes, which is not what we want.
605 Exception: We do want it for synchronous delivery!
607 And notwithstanding all the above, if D_resolver is set, implying resolver
608 debugging, leave stdout open, because that's where the resolver writes its
611 When we close stderr (which implies we've also closed stdout), we also get rid
612 of any controlling terminal.
624 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
626 (void)close(fileno(smtp_in));
627 (void)close(fileno(smtp_out));
632 (void)close(0); /* stdin */
633 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
634 if (debug_selector == 0) /* stderr */
636 if (!f.synchronous_delivery)
649 /*************************************************
651 *************************************************/
653 /* This function sets a new uid and gid permanently, optionally calling
654 initgroups() to set auxiliary groups. There are some special cases when running
655 Exim in unprivileged modes. In these situations the effective uid will not be
656 root; if we already have the right effective uid/gid, and don't need to
657 initialize any groups, leave things as they are.
662 igflag TRUE if initgroups() wanted
663 msg text to use in debugging output and failure log
665 Returns: nothing; bombs out on failure
669 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
671 uid_t euid = geteuid();
672 gid_t egid = getegid();
674 if (euid == root_uid || euid != uid || egid != gid || igflag)
676 /* At least one OS returns +1 for initgroups failure, so just check for
681 struct passwd *pw = getpwuid(uid);
683 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
684 "no passwd entry for uid=%ld", (long int)uid);
686 if (initgroups(pw->pw_name, gid) != 0)
687 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
688 (long int)uid, strerror(errno));
691 if (setgid(gid) < 0 || setuid(uid) < 0)
692 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
693 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
696 /* Debugging output included uid/gid and all groups */
700 int group_count, save_errno;
701 gid_t group_list[EXIM_GROUPLIST_SIZE];
702 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
703 (long int)geteuid(), (long int)getegid(), (long int)getpid());
704 group_count = getgroups(nelem(group_list), group_list);
706 debug_printf(" auxiliary group list:");
708 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
709 else if (group_count < 0)
710 debug_printf(" <error: %s>", strerror(save_errno));
711 else debug_printf(" <none>");
719 /*************************************************
721 *************************************************/
723 /* Exim exits via this function so that it always clears up any open
729 Returns: does not return
738 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
739 ">>>>>>>>>>>>>>>>\n",
740 (int)getpid(), process_purpose, rc);
746 exim_underbar_exit(int rc)
750 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
751 ">>>>>>>>>>>>>>>>\n",
752 (int)getpid(), process_purpose, rc);
758 /* Print error string, then die */
760 exim_fail(const char * fmt, ...)
764 vfprintf(stderr, fmt, ap);
768 /* fail if a length is too long */
770 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
772 if (itemlen <= maxlen)
774 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
775 itemlen, maxlen, description);
779 /* only pass through the string item back to the caller if it's short enough */
780 static inline const uschar *
781 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
783 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
787 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
788 of chown()/fchown(). See src/functions.h for more explanation */
790 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
792 int saved_errno = errno; /* from the preceeding chown call */
794 log_write(0, LOG_MAIN|LOG_PANIC,
795 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
796 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
797 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
799 /* I leave this here, commented, in case the "bug"(?) comes up again.
800 It is not an Exim bug, but we can provide a workaround.
806 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
808 if (buf.st_uid == owner && buf.st_gid == group) return 0;
809 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
811 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
819 /*************************************************
820 * Extract port from host address *
821 *************************************************/
823 /* Called to extract the port from the values given to -oMa and -oMi.
824 It also checks the syntax of the address, and terminates it before the
825 port data when a port is extracted.
828 address the address, with possible port on the end
830 Returns: the port, or zero if there isn't one
831 bombs out on a syntax error
835 check_port(uschar *address)
837 int port = host_address_extract_port(address);
838 if (string_is_ip_address(address, NULL) == 0)
839 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
845 /*************************************************
846 * Test/verify an address *
847 *************************************************/
849 /* This function is called by the -bv and -bt code. It extracts a working
850 address from a full RFC 822 address. This isn't really necessary per se, but it
851 has the effect of collapsing source routes.
855 flags flag bits for verify_address()
856 exit_value to be set for failures
862 test_address(uschar *s, int flags, int *exit_value)
864 int start, end, domain;
865 uschar *parse_error = NULL;
866 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
870 fprintf(stdout, "syntax error: %s\n", parse_error);
875 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
876 -1, -1, NULL, NULL, NULL);
877 if (rc == FAIL) *exit_value = 2;
878 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
884 /*************************************************
885 * Show supported features *
886 *************************************************/
889 show_db_version(FILE * f)
891 #ifdef DB_VERSION_STRING
894 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
895 fprintf(f, " Runtime: %s\n",
896 db_version(NULL, NULL, NULL));
899 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
901 #elif defined(BTREEVERSION) && defined(HASHVERSION)
903 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
905 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
908 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
909 fprintf(f, "Probably ndbm\n");
910 #elif defined(USE_TDB)
911 fprintf(f, "Using tdb\n");
914 fprintf(f, "Probably GDBM (native mode)\n");
916 fprintf(f, "Probably GDBM (compatibility mode)\n");
922 /* This function is called for -bV/--version and for -d to output the optional
923 features of the current Exim binary.
925 Arguments: a FILE for printing
930 show_whats_supported(FILE * fp)
932 rmark reset_point = store_mark();
934 DEBUG(D_any) {} else show_db_version(fp);
936 g = string_cat(NULL, US"Support for:");
937 #ifdef SUPPORT_CRYPTEQ
938 g = string_cat(g, US" crypteq");
941 g = string_cat(g, US" iconv()");
944 g = string_cat(g, US" IPv6");
946 #ifdef HAVE_SETCLASSRESOURCES
947 g = string_cat(g, US" use_setclassresources");
950 g = string_cat(g, US" PAM");
953 g = string_cat(g, US" Perl");
956 g = string_cat(g, US" Expand_dlfunc");
958 #ifdef USE_TCP_WRAPPERS
959 g = string_cat(g, US" TCPwrappers");
962 g = string_cat(g, US" GnuTLS");
965 g = string_cat(g, US" OpenSSL");
967 #ifndef DISABLE_TLS_RESUME
968 g = string_cat(g, US" TLS_resume");
970 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
971 g = string_cat(g, US" translate_ip_address");
973 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
974 g = string_cat(g, US" move_frozen_messages");
976 #ifdef WITH_CONTENT_SCAN
977 g = string_cat(g, US" Content_Scanning");
980 g = string_cat(g, US" DANE");
983 g = string_cat(g, US" DKIM");
986 g = string_cat(g, US" DMARC");
988 #ifndef DISABLE_DNSSEC
989 g = string_cat(g, US" DNSSEC");
991 #ifndef DISABLE_EVENT
992 g = string_cat(g, US" Event");
995 g = string_cat(g, US" I18N");
998 g = string_cat(g, US" OCSP");
1000 #ifndef DISABLE_PIPE_CONNECT
1001 g = string_cat(g, US" PIPE_CONNECT");
1003 #ifndef DISABLE_PRDR
1004 g = string_cat(g, US" PRDR");
1006 #ifdef SUPPORT_PROXY
1007 g = string_cat(g, US" PROXY");
1009 #ifndef DISABLE_QUEUE_RAMP
1010 g = string_cat(g, US" Experimental_Queue_Ramp");
1012 #ifdef SUPPORT_SOCKS
1013 g = string_cat(g, US" SOCKS");
1016 g = string_cat(g, US" SPF");
1018 #if defined(SUPPORT_SRS)
1019 g = string_cat(g, US" SRS");
1023 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1025 #ifdef EXPERIMENTAL_ARC
1026 g = string_cat(g, US" Experimental_ARC");
1028 #ifdef EXPERIMENTAL_BRIGHTMAIL
1029 g = string_cat(g, US" Experimental_Brightmail");
1031 #ifdef EXPERIMENTAL_DCC
1032 g = string_cat(g, US" Experimental_DCC");
1034 #ifdef EXPERIMENTAL_DSN_INFO
1035 g = string_cat(g, US" Experimental_DSN_info");
1037 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1038 g = string_cat(g, US" Experimental_ESMTP_Limits");
1040 #ifdef EXPERIMENTAL_QUEUEFILE
1041 g = string_cat(g, US" Experimental_QUEUEFILE");
1043 #if defined(EXPERIMENTAL_SRS_ALT)
1044 g = string_cat(g, US" Experimental_SRS");
1046 g = string_cat(g, US"\n");
1048 g = string_cat(g, US"Lookups (built-in):");
1049 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1050 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1052 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1053 g = string_cat(g, US" cdb");
1055 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1056 g = string_cat(g, US" dbm dbmjz dbmnz");
1058 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1059 g = string_cat(g, US" dnsdb");
1061 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1062 g = string_cat(g, US" dsearch");
1064 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1065 g = string_cat(g, US" ibase");
1067 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1068 g = string_cat(g, US" json");
1070 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1071 g = string_cat(g, US" ldap ldapdn ldapm");
1074 g = string_cat(g, US" lmdb");
1076 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1077 g = string_cat(g, US" mysql");
1079 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1080 g = string_cat(g, US" nis nis0");
1082 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1083 g = string_cat(g, US" nisplus");
1085 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1086 g = string_cat(g, US" oracle");
1088 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1089 g = string_cat(g, US" passwd");
1091 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1092 g = string_cat(g, US" pgsql");
1094 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1095 g = string_cat(g, US" redis");
1097 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1098 g = string_cat(g, US" sqlite");
1100 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1101 g = string_cat(g, US" testdb");
1103 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1104 g = string_cat(g, US" whoson");
1106 g = string_cat(g, US"\n");
1108 g = auth_show_supported(g);
1109 g = route_show_supported(g);
1110 g = transport_show_supported(g);
1112 #ifdef WITH_CONTENT_SCAN
1113 g = malware_show_supported(g);
1116 if (fixed_never_users[0] > 0)
1119 g = string_cat(g, US"Fixed never_users: ");
1120 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1121 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1122 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1125 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1126 fputs(CS string_from_gstring(g), fp);
1128 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1130 /* Everything else is details which are only worth reporting when debugging.
1131 Perhaps the tls_version_report should move into this too. */
1134 /* clang defines __GNUC__ (at least, for me) so test for it first */
1135 #if defined(__clang__)
1136 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1137 #elif defined(__GNUC__)
1138 fprintf(fp, "Compiler: GCC [%s]\n",
1142 "? unknown version ?"
1146 fprintf(fp, "Compiler: <unknown>\n");
1149 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1150 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1151 __GLIBC__, __GLIBC_MINOR__);
1152 if (__GLIBC_PREREQ(2, 1))
1153 fprintf(fp, " Runtime: %s\n",
1154 gnu_get_libc_version());
1157 show_db_version(fp);
1160 tls_version_report(fp);
1163 utf8_version_report(fp);
1165 #ifdef SUPPORT_DMARC
1166 dmarc_version_report(fp);
1169 spf_lib_version_report(fp);
1172 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1173 if (authi->version_report)
1174 (*authi->version_report)(fp);
1176 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1177 characters; unless it's an ancient version of PCRE in which case it
1179 #ifndef PCRE_PRERELEASE
1180 # define PCRE_PRERELEASE
1183 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1184 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1186 PCRE_MAJOR, PCRE_MINOR,
1187 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1190 #undef EXPAND_AND_QUOTE
1193 for (int i = 0; i < lookup_list_count; i++)
1194 if (lookup_list[i]->version_report)
1195 lookup_list[i]->version_report(fp);
1197 #ifdef WHITELIST_D_MACROS
1198 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1200 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1202 #ifdef TRUSTED_CONFIG_LIST
1203 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1205 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1209 store_reset(reset_point);
1213 /*************************************************
1214 * Show auxiliary information about Exim *
1215 *************************************************/
1218 show_exim_information(enum commandline_info request, FILE *stream)
1223 fprintf(stream, "Oops, something went wrong.\n");
1227 "The -bI: flag takes a string indicating which information to provide.\n"
1228 "If the string is not recognised, you'll get this help (on stderr).\n"
1230 " exim -bI:help this information\n"
1231 " exim -bI:dscp list of known dscp value keywords\n"
1232 " exim -bI:sieve list of supported sieve extensions\n"
1236 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1237 fprintf(stream, "%s\n", *pp);
1240 dscp_list_to_stream(stream);
1246 /*************************************************
1247 * Quote a local part *
1248 *************************************************/
1250 /* This function is used when a sender address or a From: or Sender: header
1251 line is being created from the caller's login, or from an authenticated_id. It
1252 applies appropriate quoting rules for a local part.
1254 Argument: the local part
1255 Returns: the local part, quoted if necessary
1259 local_part_quote(uschar *lpart)
1261 BOOL needs_quote = FALSE;
1264 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1266 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1267 (*t != '.' || t == lpart || t[1] == 0);
1270 if (!needs_quote) return lpart;
1272 g = string_catn(NULL, US"\"", 1);
1276 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1279 g = string_cat(g, lpart);
1282 g = string_catn(g, lpart, nq - lpart);
1283 g = string_catn(g, US"\\", 1);
1284 g = string_catn(g, nq, 1);
1288 g = string_catn(g, US"\"", 1);
1289 return string_from_gstring(g);
1295 /*************************************************
1296 * Load readline() functions *
1297 *************************************************/
1299 /* This function is called from testing executions that read data from stdin,
1300 but only when running as the calling user. Currently, only -be does this. The
1301 function loads the readline() function library and passes back the functions.
1302 On some systems, it needs the curses library, so load that too, but try without
1303 it if loading fails. All this functionality has to be requested at build time.
1306 fn_readline_ptr pointer to where to put the readline pointer
1307 fn_addhist_ptr pointer to where to put the addhistory function
1309 Returns: the dlopen handle or NULL on failure
1313 set_readline(char * (**fn_readline_ptr)(const char *),
1314 void (**fn_addhist_ptr)(const char *))
1317 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1319 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1320 if (dlhandle_curses) dlclose(dlhandle_curses);
1324 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1325 * char * readline (const char *prompt);
1326 * void add_history (const char *string);
1328 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1329 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1332 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1340 /*************************************************
1341 * Get a line from stdin for testing things *
1342 *************************************************/
1344 /* This function is called when running tests that can take a number of lines
1345 of input (for example, -be and -bt). It handles continuations and trailing
1346 spaces. And prompting and a blank line output on eof. If readline() is in use,
1347 the arguments are non-NULL and provide the relevant functions.
1350 fn_readline readline function or NULL
1351 fn_addhist addhist function or NULL
1353 Returns: pointer to dynamic memory, or NULL at end of file
1357 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1361 if (!fn_readline) { printf("> "); fflush(stdout); }
1363 for (int i = 0;; i++)
1365 uschar buffer[1024];
1369 char *readline_line = NULL;
1372 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1373 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1374 p = US readline_line;
1379 /* readline() not in use */
1382 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1386 /* Handle the line */
1388 ss = p + (int)Ustrlen(p);
1389 while (ss > p && isspace(ss[-1])) ss--;
1392 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1394 g = string_catn(g, p, ss - p);
1397 if (fn_readline) free(readline_line);
1400 /* g can only be NULL if ss==p */
1401 if (ss == p || g->s[g->ptr-1] != '\\')
1405 (void) string_from_gstring(g);
1408 if (!g) printf("\n");
1409 return string_from_gstring(g);
1414 /*************************************************
1415 * Output usage information for the program *
1416 *************************************************/
1418 /* This function is called when there are no recipients
1419 or a specific --help argument was added.
1422 progname information on what name we were called by
1424 Returns: DOES NOT RETURN
1428 exim_usage(uschar *progname)
1431 /* Handle specific program invocation variants */
1432 if (Ustrcmp(progname, US"-mailq") == 0)
1434 "mailq - list the contents of the mail queue\n\n"
1435 "For a list of options, see the Exim documentation.\n");
1437 /* Generic usage - we output this whatever happens */
1439 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1440 "not directly from a shell command line. Options and/or arguments control\n"
1441 "what it does when called. For a list of options, see the Exim documentation.\n");
1446 /*************************************************
1447 * Validate that the macros given are okay *
1448 *************************************************/
1450 /* Typically, Exim will drop privileges if macros are supplied. In some
1451 cases, we want to not do so.
1453 Arguments: opt_D_used - true if the commandline had a "-D" option
1454 Returns: true if trusted, false otherwise
1458 macros_trusted(BOOL opt_D_used)
1460 #ifdef WHITELIST_D_MACROS
1461 uschar *whitelisted, *end, *p, **whites;
1462 int white_count, i, n;
1464 BOOL prev_char_item, found;
1469 #ifndef WHITELIST_D_MACROS
1473 /* We only trust -D overrides for some invoking users:
1474 root, the exim run-time user, the optional config owner user.
1475 I don't know why config-owner would be needed, but since they can own the
1476 config files anyway, there's no security risk to letting them override -D. */
1477 if ( ! ((real_uid == root_uid)
1478 || (real_uid == exim_uid)
1479 #ifdef CONFIGURE_OWNER
1480 || (real_uid == config_uid)
1484 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1488 /* Get a list of macros which are whitelisted */
1489 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1490 prev_char_item = FALSE;
1492 for (p = whitelisted; *p != '\0'; ++p)
1494 if (*p == ':' || isspace(*p))
1499 prev_char_item = FALSE;
1502 if (!prev_char_item)
1503 prev_char_item = TRUE;
1510 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1511 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1516 if (i == white_count)
1518 while (*p != '\0' && p < end)
1524 /* The list of commandline macros should be very short.
1525 Accept the N*M complexity. */
1526 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1529 for (uschar ** w = whites; *w; ++w)
1530 if (Ustrcmp(*w, m->name) == 0)
1537 if (!m->replacement)
1539 if ((len = m->replen) == 0)
1541 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1542 0, PCRE_EOPT, NULL, 0);
1545 if (n != PCRE_ERROR_NOMATCH)
1546 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1550 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1556 /*************************************************
1557 * Expansion testing *
1558 *************************************************/
1560 /* Expand and print one item, doing macro-processing.
1563 item line for expansion
1567 expansion_test_line(const uschar * line)
1573 Ustrncpy(big_buffer, line, big_buffer_size);
1574 big_buffer[big_buffer_size-1] = '\0';
1575 len = Ustrlen(big_buffer);
1577 (void) macros_expand(0, &len, &dummy_macexp);
1579 if (isupper(big_buffer[0]))
1581 if (macro_read_assignment(big_buffer))
1582 printf("Defined macro '%s'\n", mlast->name);
1585 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1586 else printf("Failed: %s\n", expand_string_message);
1591 /*************************************************
1592 * Entry point and high-level code *
1593 *************************************************/
1595 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1596 the appropriate action. All the necessary functions are present in the one
1597 binary. I originally thought one should split it up, but it turns out that so
1598 much of the apparatus is needed in each chunk that one might as well just have
1599 it all available all the time, which then makes the coding easier as well.
1602 argc count of entries in argv
1603 argv argument strings, with argv[0] being the program name
1605 Returns: EXIT_SUCCESS if terminated successfully
1606 EXIT_FAILURE otherwise, except when a message has been sent
1607 to the sender, and -oee was given
1611 main(int argc, char **cargv)
1613 uschar **argv = USS cargv;
1614 int arg_receive_timeout = -1;
1615 int arg_smtp_receive_timeout = -1;
1616 int arg_error_handling = error_handling;
1617 int filter_sfd = -1;
1618 int filter_ufd = -1;
1621 int list_queue_option = 0;
1623 int msg_action_arg = -1;
1624 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1625 int queue_only_reason = 0;
1627 int perl_start_option = 0;
1629 int recipients_arg = argc;
1630 int sender_address_domain = 0;
1631 int test_retry_arg = -1;
1632 int test_rewrite_arg = -1;
1633 gid_t original_egid;
1634 BOOL arg_queue_only = FALSE;
1635 BOOL bi_option = FALSE;
1636 BOOL checking = FALSE;
1637 BOOL count_queue = FALSE;
1638 BOOL expansion_test = FALSE;
1639 BOOL extract_recipients = FALSE;
1640 BOOL flag_G = FALSE;
1641 BOOL flag_n = FALSE;
1642 BOOL forced_delivery = FALSE;
1643 BOOL f_end_dot = FALSE;
1644 BOOL deliver_give_up = FALSE;
1645 BOOL list_queue = FALSE;
1646 BOOL list_options = FALSE;
1647 BOOL list_config = FALSE;
1648 BOOL local_queue_only;
1649 BOOL one_msg_action = FALSE;
1650 BOOL opt_D_used = FALSE;
1651 BOOL queue_only_set = FALSE;
1652 BOOL receiving_message = TRUE;
1653 BOOL sender_ident_set = FALSE;
1654 BOOL session_local_queue_only;
1656 BOOL removed_privilege = FALSE;
1657 BOOL usage_wanted = FALSE;
1658 BOOL verify_address_mode = FALSE;
1659 BOOL verify_as_sender = FALSE;
1660 BOOL rcpt_verify_quota = FALSE;
1661 BOOL version_printed = FALSE;
1662 uschar *alias_arg = NULL;
1663 uschar *called_as = US"";
1664 uschar *cmdline_syslog_name = NULL;
1665 uschar *start_queue_run_id = NULL;
1666 uschar *stop_queue_run_id = NULL;
1667 uschar *expansion_test_message = NULL;
1668 const uschar *ftest_domain = NULL;
1669 const uschar *ftest_localpart = NULL;
1670 const uschar *ftest_prefix = NULL;
1671 const uschar *ftest_suffix = NULL;
1672 uschar *log_oneline = NULL;
1673 uschar *malware_test_file = NULL;
1674 uschar *real_sender_address;
1675 uschar *originator_home = US"/";
1679 struct stat statbuf;
1680 pid_t passed_qr_pid = (pid_t)0;
1681 int passed_qr_pipe = -1;
1682 gid_t group_list[EXIM_GROUPLIST_SIZE];
1684 /* For the -bI: flag */
1685 enum commandline_info info_flag = CMDINFO_NONE;
1686 BOOL info_stdout = FALSE;
1688 /* Possible options for -R and -S */
1690 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1692 /* Need to define this in case we need to change the environment in order
1693 to get rid of a bogus time zone. We have to make it char rather than uschar
1694 because some OS define it in /usr/include/unistd.h. */
1696 extern char **environ;
1698 #ifdef MEASURE_TIMING
1699 (void)gettimeofday(×tamp_startup, NULL);
1702 store_init(); /* Initialise the memory allocation susbsystem */
1704 /* If the Exim user and/or group and/or the configuration file owner/group were
1705 defined by ref:name at build time, we must now find the actual uid/gid values.
1706 This is a feature to make the lives of binary distributors easier. */
1708 #ifdef EXIM_USERNAME
1709 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1712 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1714 /* If ref:name uses a number as the name, route_finduser() returns
1715 TRUE with exim_uid set and pw coerced to NULL. */
1717 exim_gid = pw->pw_gid;
1718 #ifndef EXIM_GROUPNAME
1721 "exim: ref:name should specify a usercode, not a group.\n"
1722 "exim: can't let you get away with it unless you also specify a group.\n");
1726 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1729 #ifdef EXIM_GROUPNAME
1730 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1731 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1734 #ifdef CONFIGURE_OWNERNAME
1735 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1736 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1737 CONFIGURE_OWNERNAME);
1740 /* We default the system_filter_user to be the Exim run-time user, as a
1741 sane non-root value. */
1742 system_filter_uid = exim_uid;
1744 #ifdef CONFIGURE_GROUPNAME
1745 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1746 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1747 CONFIGURE_GROUPNAME);
1750 /* In the Cygwin environment, some initialization used to need doing.
1751 It was fudged in by means of this macro; now no longer but we'll leave
1752 it in case of others. */
1758 /* Check a field which is patched when we are running Exim within its
1759 testing harness; do a fast initial check, and then the whole thing. */
1761 f.running_in_test_harness =
1762 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1763 if (f.running_in_test_harness)
1766 /* Protect against abusive argv[0] */
1767 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1769 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1770 at the start of a program; however, it seems that some environments do not
1771 follow this. A "strange" locale can affect the formatting of timestamps, so we
1774 setlocale(LC_ALL, "C");
1776 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1778 #ifdef _POSIX_MONOTONIC_CLOCK
1782 /* Set up the default handler for timing using alarm(). */
1784 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1786 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1787 because store_malloc writes a log entry on failure. */
1789 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1790 exim_fail("exim: failed to get store for log buffer\n");
1792 /* Initialize the default log options. */
1794 bits_set(log_selector, log_selector_size, log_default);
1796 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1797 NULL when the daemon is run and the file is closed. We have to use this
1798 indirection, because some systems don't allow writing to the variable "stderr".
1801 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1803 /* Arrange for the PCRE regex library to use our store functions. Note that
1804 the normal calls are actually macros that add additional arguments for
1805 debugging purposes so we have to assign specially constructed functions here.
1806 The default is to use store in the stacking pool, but this is overridden in the
1807 regex_must_compile() function. */
1809 pcre_malloc = function_store_get;
1810 pcre_free = function_dummy_free;
1812 /* Ensure there is a big buffer for temporary use in several places. It is put
1813 in malloc store so that it can be freed for enlargement if necessary. */
1815 big_buffer = store_malloc(big_buffer_size);
1817 /* Set up the handler for the data request signal, and set the initial
1818 descriptive text. */
1820 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1821 set_process_info("initializing");
1822 os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
1823 signal(SIGSEGV, segv_handler); /* log faults */
1825 /* If running in a dockerized environment, the TERM signal is only
1826 delegated to the PID 1 if we request it by setting an signal handler */
1827 if (getpid() == 1) signal(SIGTERM, term_handler);
1829 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1830 in the daemon code. For the rest of Exim's uses, we ignore it. */
1832 signal(SIGHUP, SIG_IGN);
1834 /* We don't want to die on pipe errors as the code is written to handle
1835 the write error instead. */
1837 signal(SIGPIPE, SIG_IGN);
1839 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1840 set to SIG_IGN. This causes subprocesses that complete before the parent
1841 process waits for them not to hang around, so when Exim calls wait(), nothing
1842 is there. The wait() code has been made robust against this, but let's ensure
1843 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1844 ending status. We use sigaction rather than plain signal() on those OS where
1845 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1846 problem on AIX with this.) */
1850 struct sigaction act;
1851 act.sa_handler = SIG_DFL;
1852 sigemptyset(&(act.sa_mask));
1854 sigaction(SIGCHLD, &act, NULL);
1857 signal(SIGCHLD, SIG_DFL);
1860 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1865 /* Set up the version number. Set up the leading 'E' for the external form of
1866 message ids, set the pointer to the internal form, and initialize it to
1867 indicate no message being processed. */
1870 message_id_option[0] = '-';
1871 message_id_external = message_id_option + 1;
1872 message_id_external[0] = 'E';
1873 message_id = message_id_external + 1;
1876 /* Set the umask to zero so that any files Exim creates using open() are
1877 created with the modes that it specifies. NOTE: Files created with fopen() have
1878 a problem, which was not recognized till rather late (February 2006). With this
1879 umask, such files will be world writeable. (They are all content scanning files
1880 in the spool directory, which isn't world-accessible, so this is not a
1881 disaster, but it's untidy.) I don't want to change this overall setting,
1882 however, because it will interact badly with the open() calls. Instead, there's
1883 now a function called modefopen() that fiddles with the umask while calling
1888 /* Precompile the regular expression for matching a message id. Keep this in
1889 step with the code that generates ids in the accept.c module. We need to do
1890 this here, because the -M options check their arguments for syntactic validity
1891 using mac_ismsgid, which uses this. */
1894 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1896 /* Precompile the regular expression that is used for matching an SMTP error
1897 code, possibly extended, at the start of an error message. Note that the
1898 terminating whitespace character is included. */
1901 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1904 #ifdef WHITELIST_D_MACROS
1905 /* Precompile the regular expression used to filter the content of macros
1906 given to -D for permissibility. */
1908 regex_whitelisted_macro =
1909 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1912 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1914 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1915 this seems to be a generally accepted convention, since one finds symbolic
1916 links called "mailq" in standard OS configurations. */
1918 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1919 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1922 receiving_message = FALSE;
1923 called_as = US"-mailq";
1926 /* If the program is called as "rmail" treat it as equivalent to
1927 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1928 i.e. preventing a single dot on a line from terminating the message, and
1929 returning with zero return code, even in cases of error (provided an error
1930 message has been sent). */
1932 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1933 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1936 called_as = US"-rmail";
1937 errors_sender_rc = EXIT_SUCCESS;
1940 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1941 this is a smail convention. */
1943 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1944 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1946 smtp_input = smtp_batched_input = TRUE;
1947 called_as = US"-rsmtp";
1950 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1951 this is a smail convention. */
1953 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1954 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1957 receiving_message = FALSE;
1958 called_as = US"-runq";
1961 /* If the program is called as "newaliases" treat it as equivalent to
1962 "exim -bi"; this is a sendmail convention. */
1964 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1965 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1968 receiving_message = FALSE;
1969 called_as = US"-newaliases";
1972 /* Save the original effective uid for a couple of uses later. It should
1973 normally be root, but in some esoteric environments it may not be. */
1975 original_euid = geteuid();
1976 original_egid = getegid();
1978 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1979 to be the same as the real ones. This makes a difference only if Exim is setuid
1980 (or setgid) to something other than root, which could be the case in some
1981 special configurations. */
1983 real_uid = getuid();
1984 real_gid = getgid();
1986 if (real_uid == root_uid)
1988 if ((rv = setgid(real_gid)))
1989 exim_fail("exim: setgid(%ld) failed: %s\n",
1990 (long int)real_gid, strerror(errno));
1991 if ((rv = setuid(real_uid)))
1992 exim_fail("exim: setuid(%ld) failed: %s\n",
1993 (long int)real_uid, strerror(errno));
1996 /* If neither the original real uid nor the original euid was root, Exim is
1997 running in an unprivileged state. */
1999 unprivileged = (real_uid != root_uid && original_euid != root_uid);
2001 /* For most of the args-parsing we need to use permanent pool memory */
2003 int old_pool = store_pool;
2004 store_pool = POOL_PERM;
2006 /* Scan the program's arguments. Some can be dealt with right away; others are
2007 simply recorded for checking and handling afterwards. Do a high-level switch
2008 on the second character (the one after '-'), to save some effort. */
2010 for (i = 1; i < argc; i++)
2012 BOOL badarg = FALSE;
2013 uschar * arg = argv[i];
2017 /* An argument not starting with '-' is the start of a recipients list;
2018 break out of the options-scanning loop. */
2026 /* An option consisting of -- terminates the options */
2028 if (Ustrcmp(arg, "--") == 0)
2030 recipients_arg = i + 1;
2034 /* Handle flagged options */
2036 switchchar = arg[1];
2039 /* Make all -ex options synonymous with -oex arguments, since that
2040 is assumed by various callers. Also make -qR options synonymous with -R
2041 options, as that seems to be required as well. Allow for -qqR too, and
2042 the same for -S options. */
2044 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2045 Ustrncmp(arg+1, "qR", 2) == 0 ||
2046 Ustrncmp(arg+1, "qS", 2) == 0)
2048 switchchar = arg[2];
2051 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2053 switchchar = arg[3];
2055 f.queue_2stage = TRUE;
2058 /* Make -r synonymous with -f, since it is a documented alias */
2060 else if (arg[1] == 'r') switchchar = 'f';
2062 /* Make -ov synonymous with -v */
2064 else if (Ustrcmp(arg, "-ov") == 0)
2070 /* deal with --option_aliases */
2071 else if (switchchar == '-')
2073 if (Ustrcmp(argrest, "help") == 0)
2075 usage_wanted = TRUE;
2078 else if (Ustrcmp(argrest, "version") == 0)
2085 /* High-level switch on active initial letter */
2090 /* sendmail uses -Ac and -Am to control which .cf file is used;
2093 if (!*argrest) { badarg = TRUE; break; }
2096 BOOL ignore = FALSE;
2101 if (*(argrest + 1) == '\0')
2105 if (!ignore) badarg = TRUE;
2109 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2110 so has no need of it. */
2113 if (!*argrest) i++; /* Skip over the type */
2119 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2123 /* -bd: Run in daemon mode, awaiting SMTP connections.
2124 -bdf: Ditto, but in the foreground.
2127 f.daemon_listen = TRUE;
2128 if (*argrest == 'f') f.background_daemon = FALSE;
2129 else if (*argrest) badarg = TRUE;
2132 /* -be: Run in expansion test mode
2133 -bem: Ditto, but read a message from a file first
2136 expansion_test = checking = TRUE;
2137 if (*argrest == 'm')
2139 if (++i >= argc) { badarg = TRUE; break; }
2140 expansion_test_message = argv[i];
2143 if (*argrest) badarg = TRUE;
2146 /* -bF: Run system filter test */
2148 filter_test |= checking = FTEST_SYSTEM;
2149 if (*argrest) badarg = TRUE;
2150 else if (++i < argc) filter_test_sfile = argv[i];
2151 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2154 /* -bf: Run user filter test
2155 -bfd: Set domain for filter testing
2156 -bfl: Set local part for filter testing
2157 -bfp: Set prefix for filter testing
2158 -bfs: Set suffix for filter testing
2163 filter_test |= checking = FTEST_USER;
2164 if (++i < argc) filter_test_ufile = argv[i];
2165 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2170 exim_fail("exim: string expected after %s\n", arg);
2171 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2172 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2173 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2174 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2179 /* -bh: Host checking - an IP address must follow. */
2181 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2183 if (++i >= argc) { badarg = TRUE; break; }
2184 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2185 host_checking = checking = f.log_testing_mode = TRUE;
2186 f.host_checking_callout = *argrest == 'c';
2187 message_logs = FALSE;
2192 /* -bi: This option is used by sendmail to initialize *the* alias file,
2193 though it has the -oA option to specify a different file. Exim has no
2194 concept of *the* alias file, but since Sun's YP make script calls
2195 sendmail this way, some support must be provided. */
2197 if (!*argrest) bi_option = TRUE;
2201 /* -bI: provide information, of the type to follow after a colon.
2202 This is an Exim flag. */
2204 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2206 uschar *p = argrest+1;
2207 info_flag = CMDINFO_HELP;
2209 if (strcmpic(p, CUS"sieve") == 0)
2211 info_flag = CMDINFO_SIEVE;
2214 else if (strcmpic(p, CUS"dscp") == 0)
2216 info_flag = CMDINFO_DSCP;
2219 else if (strcmpic(p, CUS"help") == 0)
2225 /* -bm: Accept and deliver message - the default option. Reinstate
2226 receiving_message, which got turned off for all -b options.
2227 -bmalware: test the filename given for malware */
2229 if (!*argrest) receiving_message = TRUE;
2230 else if (Ustrcmp(argrest, "alware") == 0)
2232 if (++i >= argc) { badarg = TRUE; break; }
2234 malware_test_file = argv[i];
2239 /* -bnq: For locally originating messages, do not qualify unqualified
2240 addresses. In the envelope, this causes errors; in header lines they
2243 if (Ustrcmp(argrest, "q") == 0)
2245 f.allow_unqualified_sender = FALSE;
2246 f.allow_unqualified_recipient = FALSE;
2251 /* -bpxx: List the contents of the mail queue, in various forms. If
2252 the option is -bpc, just a queue count is needed. Otherwise, if the
2253 first letter after p is r, then order is random. */
2255 if (*argrest == 'c')
2258 if (*++argrest) badarg = TRUE;
2262 if (*argrest == 'r')
2264 list_queue_option = 8;
2267 else list_queue_option = 0;
2271 /* -bp: List the contents of the mail queue, top-level only */
2275 /* -bpu: List the contents of the mail queue, top-level undelivered */
2277 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2279 /* -bpa: List the contents of the mail queue, including all delivered */
2281 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2283 /* Unknown after -bp[r] */
2289 /* -bP: List the configuration variables given as the address list.
2290 Force -v, so configuration errors get displayed. */
2293 /* -bP config: we need to setup here, because later,
2294 when list_options is checked, the config is read already */
2297 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2300 readconf_save_config(version_string);
2304 list_options = TRUE;
2305 debug_selector |= D_v;
2306 debug_file = stderr;
2310 /* -brt: Test retry configuration lookup */
2312 if (Ustrcmp(argrest, "t") == 0)
2315 test_retry_arg = i + 1;
2319 /* -brw: Test rewrite configuration */
2321 else if (Ustrcmp(argrest, "w") == 0)
2324 test_rewrite_arg = i + 1;
2330 /* -bS: Read SMTP commands on standard input, but produce no replies -
2331 all errors are reported by sending messages. */
2334 smtp_input = smtp_batched_input = receiving_message = TRUE;
2338 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2339 on standard output. */
2341 if (!*argrest) smtp_input = receiving_message = TRUE;
2345 /* -bt: address testing mode */
2348 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2352 /* -bv: verify addresses */
2355 verify_address_mode = checking = f.log_testing_mode = TRUE;
2357 /* -bvs: verify sender addresses */
2359 else if (Ustrcmp(argrest, "s") == 0)
2361 verify_address_mode = checking = f.log_testing_mode = TRUE;
2362 verify_as_sender = TRUE;
2367 /* -bV: Print version string and support details */
2371 printf("Exim version %s #%s built %s\n", version_string,
2372 version_cnumber, version_date);
2373 printf("%s\n", CS version_copyright);
2374 version_printed = TRUE;
2375 show_whats_supported(stdout);
2376 f.log_testing_mode = TRUE;
2381 /* -bw: inetd wait mode, accept a listening socket as stdin */
2383 f.inetd_wait_mode = TRUE;
2384 f.background_daemon = FALSE;
2385 f.daemon_listen = TRUE;
2387 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2388 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2399 /* -C: change configuration file list; ignore if it isn't really
2400 a change! Enforce a prefix check if required. */
2404 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2405 if (Ustrcmp(config_main_filelist, argrest) != 0)
2407 #ifdef ALT_CONFIG_PREFIX
2409 int len = Ustrlen(ALT_CONFIG_PREFIX);
2410 const uschar *list = argrest;
2412 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2413 while((filename = string_nextinlist(&list, &sep, big_buffer,
2415 if ( ( Ustrlen(filename) < len
2416 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2417 || Ustrstr(filename, "/../") != NULL
2419 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2421 exim_fail("-C Permission denied\n");
2423 if (real_uid != root_uid)
2425 #ifdef TRUSTED_CONFIG_LIST
2427 if (real_uid != exim_uid
2428 #ifdef CONFIGURE_OWNER
2429 && real_uid != config_uid
2432 f.trusted_config = FALSE;
2435 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2438 struct stat statbuf;
2440 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2441 (statbuf.st_uid != root_uid /* owner not root */
2442 #ifdef CONFIGURE_OWNER
2443 && statbuf.st_uid != config_uid /* owner not the special one */
2446 (statbuf.st_gid != root_gid /* group not root */
2447 #ifdef CONFIGURE_GROUP
2448 && statbuf.st_gid != config_gid /* group not the special one */
2450 && (statbuf.st_mode & 020) != 0 /* group writeable */
2452 (statbuf.st_mode & 2) != 0) /* world writeable */
2454 f.trusted_config = FALSE;
2459 /* Well, the trust list at least is up to scratch... */
2461 uschar *trusted_configs[32];
2464 int old_pool = store_pool;
2465 store_pool = POOL_MAIN;
2467 reset_point = store_mark();
2468 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2470 uschar *start = big_buffer, *nl;
2471 while (*start && isspace(*start))
2475 nl = Ustrchr(start, '\n');
2478 trusted_configs[nr_configs++] = string_copy(start);
2479 if (nr_configs == nelem(trusted_configs))
2487 const uschar *list = argrest;
2489 while (f.trusted_config && (filename = string_nextinlist(&list,
2490 &sep, big_buffer, big_buffer_size)))
2492 for (i=0; i < nr_configs; i++)
2493 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2495 if (i == nr_configs)
2497 f.trusted_config = FALSE;
2502 else /* No valid prefixes found in trust_list file. */
2503 f.trusted_config = FALSE;
2504 store_reset(reset_point);
2505 store_pool = old_pool;
2508 else /* Could not open trust_list file. */
2509 f.trusted_config = FALSE;
2512 /* Not root; don't trust config */
2513 f.trusted_config = FALSE;
2517 config_main_filelist = argrest;
2518 f.config_changed = TRUE;
2523 /* -D: set up a macro definition */
2526 #ifdef DISABLE_D_OPTION
2527 exim_fail("exim: -D is not available in this Exim binary\n");
2533 uschar *s = argrest;
2536 while (isspace(*s)) s++;
2538 if (*s < 'A' || *s > 'Z')
2539 exim_fail("exim: macro name set by -D must start with "
2540 "an upper case letter\n");
2542 while (isalnum(*s) || *s == '_')
2544 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2548 if (ptr == 0) { badarg = TRUE; break; }
2549 while (isspace(*s)) s++;
2552 if (*s++ != '=') { badarg = TRUE; break; }
2553 while (isspace(*s)) s++;
2556 for (m = macros_user; m; m = m->next)
2557 if (Ustrcmp(m->name, name) == 0)
2558 exim_fail("exim: duplicated -D in command line\n");
2560 m = macro_create(name, s, TRUE);
2562 if (clmacro_count >= MAX_CLMACROS)
2563 exim_fail("exim: too many -D options on command line\n");
2564 clmacros[clmacro_count++] =
2565 string_sprintf("-D%s=%s", m->name, m->replacement);
2570 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2571 The latter is now a no-op, retained for compatibility only. If -dd is used,
2572 debugging subprocesses of the daemon is disabled. */
2575 if (Ustrcmp(argrest, "ropcr") == 0)
2577 /* drop_cr = TRUE; */
2580 /* Use an intermediate variable so that we don't set debugging while
2581 decoding the debugging bits. */
2585 unsigned int selector = D_default;
2588 if (*argrest == 'd')
2590 f.debug_daemon = TRUE;
2594 decode_bits(&selector, 1, debug_notall, argrest,
2595 debug_options, debug_options_count, US"debug", 0);
2596 debug_selector = selector;
2601 /* -E: This is a local error message. This option is not intended for
2602 external use at all, but is not restricted to trusted callers because it
2603 does no harm (just suppresses certain error messages) and if Exim is run
2604 not setuid root it won't always be trusted when it generates error
2605 messages using this option. If there is a message id following -E, point
2606 message_reference at it, for logging. */
2609 f.local_error_message = TRUE;
2610 if (mac_ismsgid(argrest)) message_reference = argrest;
2614 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2615 option, so it looks as if historically the -oex options are also callable
2616 without the leading -o. So we have to accept them. Before the switch,
2617 anything starting -oe has been converted to -e. Exim does not support all
2618 of the sendmail error options. */
2621 if (Ustrcmp(argrest, "e") == 0)
2623 arg_error_handling = ERRORS_SENDER;
2624 errors_sender_rc = EXIT_SUCCESS;
2626 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2627 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2628 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2629 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2634 /* -F: Set sender's full name, used instead of the gecos entry from
2635 the password file. Since users can usually alter their gecos entries,
2636 there's no security involved in using this instead. The data can follow
2637 the -F or be in the next argument. */
2641 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2642 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2643 f.sender_name_forced = TRUE;
2647 /* -f: Set sender's address - this value is only actually used if Exim is
2648 run by a trusted user, or if untrusted_set_sender is set and matches the
2649 address, except that the null address can always be set by any user. The
2650 test for this happens later, when the value given here is ignored when not
2651 permitted. For an untrusted user, the actual sender is still put in Sender:
2652 if it doesn't match the From: header (unless no_local_from_check is set).
2653 The data can follow the -f or be in the next argument. The -r switch is an
2654 obsolete form of -f but since there appear to be programs out there that
2655 use anything that sendmail has ever supported, better accept it - the
2656 synonymizing is done before the switch above.
2658 At this stage, we must allow domain literal addresses, because we don't
2659 know what the setting of allow_domain_literals is yet. Ditto for trailing
2660 dots and strip_trailing_dot. */
2664 int dummy_start, dummy_end;
2667 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2668 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2670 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2673 uschar * temp = argrest + Ustrlen(argrest) - 1;
2674 while (temp >= argrest && isspace(*temp)) temp--;
2675 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2676 allow_domain_literals = TRUE;
2677 strip_trailing_dot = TRUE;
2679 allow_utf8_domains = TRUE;
2681 if (!(sender_address = parse_extract_address(argrest, &errmess,
2682 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2683 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2685 sender_address = string_copy_taint(sender_address, TRUE);
2687 message_smtputf8 = string_is_utf8(sender_address);
2688 allow_utf8_domains = FALSE;
2690 allow_domain_literals = FALSE;
2691 strip_trailing_dot = FALSE;
2693 f.sender_address_forced = TRUE;
2697 /* -G: sendmail invocation to specify that it's a gateway submission and
2698 sendmail may complain about problems instead of fixing them.
2699 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2700 not at this time complain about problems. */
2706 /* -h: Set the hop count for an incoming message. Exim does not currently
2707 support this; it always computes it by counting the Received: headers.
2708 To put it in will require a change to the spool header file format. */
2712 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2713 if (!isdigit(*argrest)) badarg = TRUE;
2717 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2718 not to be documented for sendmail but mailx (at least) uses it) */
2721 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2725 /* -L: set the identifier used for syslog; equivalent to setting
2726 syslog_processname in the config file, but needs to be an admin option. */
2730 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2731 if ((sz = Ustrlen(argrest)) > 32)
2732 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2734 exim_fail("exim: the -L syslog name is too short\n");
2735 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2739 receiving_message = FALSE;
2741 /* -MC: continue delivery of another message via an existing open
2742 file descriptor. This option is used for an internal call by the
2743 smtp transport when there is a pending message waiting to go to an
2744 address to which it has got a connection. Five subsequent arguments are
2745 required: transport name, host name, IP address, sequence number, and
2746 message_id. Transports may decline to create new processes if the sequence
2747 number gets too big. The channel is stdin. This (-MC) must be the last
2748 argument. There's a subsequent check that the real-uid is privileged.
2750 If we are running in the test harness. delay for a bit, to let the process
2751 that set this one up complete. This makes for repeatability of the logging,
2754 if (Ustrcmp(argrest, "C") == 0)
2756 union sockaddr_46 interface_sock;
2757 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2760 exim_fail("exim: too many or too few arguments after -MC\n");
2762 if (msg_action_arg >= 0)
2763 exim_fail("exim: incompatible arguments\n");
2765 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2766 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2767 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2768 continue_sequence = Uatoi(argv[++i]);
2769 msg_action = MSG_DELIVER;
2770 msg_action_arg = ++i;
2771 forced_delivery = TRUE;
2772 queue_run_pid = passed_qr_pid;
2773 queue_run_pipe = passed_qr_pipe;
2775 if (!mac_ismsgid(argv[i]))
2776 exim_fail("exim: malformed message id %s after -MC option\n",
2779 /* Set up $sending_ip_address and $sending_port, unless proxied */
2781 if (!continue_proxy_cipher)
2782 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2784 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2787 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2790 testharness_pause_ms(500);
2794 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2798 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2799 precedes -MC (see above). The flag indicates that the host to which
2800 Exim is connected has accepted an AUTH sequence. */
2802 case 'A': f.smtp_authenticated = TRUE; break;
2804 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2805 that exim is connected to supports the esmtp extension DSN */
2807 case 'D': smtp_peer_options |= OPTION_DSN; break;
2809 /* -MCd: for debug, set a process-purpose string */
2811 case 'd': if (++i < argc)
2812 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2816 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2817 from the commandline should be tainted - but we will need an untainted
2818 value for the spoolfile when doing a -odi delivery process. */
2820 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2824 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2826 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2828 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2829 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2830 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2832 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2834 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2839 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2840 it preceded -MC (see above) */
2842 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2844 #ifdef SUPPORT_SOCKS
2845 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2846 case 'p': proxy_session = TRUE;
2849 proxy_local_address = string_copy_taint(argv[i], TRUE);
2852 proxy_local_port = Uatoi(argv[i]);
2855 proxy_external_address = string_copy_taint(argv[i], TRUE);
2858 proxy_external_port = Uatoi(argv[i]);
2864 /* -MCQ: pass on the pid of the queue-running process that started
2865 this chain of deliveries and the fd of its synchronizing pipe; this
2866 is useful only when it precedes -MC (see above) */
2868 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2870 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2874 /* -MCq: do a quota check on the given recipient for the given size
2875 of message. Separate from -MC. */
2876 case 'q': rcpt_verify_quota = TRUE;
2877 if (++i < argc) message_size = Uatoi(argv[i]);
2881 /* -MCS: set the smtp_use_size flag; this is useful only when it
2882 precedes -MC (see above) */
2884 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2887 /* -MCs: used with -MCt; SNI was sent */
2888 /* -MCr: ditto, DANE */
2891 case 's': if (++i < argc)
2893 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2894 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2899 /* -MCt: similar to -MCT below but the connection is still open
2900 via a proxy process which handles the TLS context and coding.
2901 Require three arguments for the proxied local address and port,
2902 and the TLS cipher. */
2904 case 't': if (++i < argc)
2905 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2908 sending_port = (int)(Uatol(argv[i]));
2911 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2915 /* -MCT: set the tls_offered flag; this is useful only when it
2916 precedes -MC (see above). The flag indicates that the host to which
2917 Exim is connected has offered TLS support. */
2919 case 'T': smtp_peer_options |= OPTION_TLS; break;
2922 default: badarg = TRUE; break;
2927 /* -M[x]: various operations on the following list of message ids:
2928 -M deliver the messages, ignoring next retry times and thawing
2929 -Mc deliver the messages, checking next retry times, no thawing
2930 -Mf freeze the messages
2931 -Mg give up on the messages
2932 -Mt thaw the messages
2933 -Mrm remove the messages
2934 In the above cases, this must be the last option. There are also the
2935 following options which are followed by a single message id, and which
2936 act on that message. Some of them use the "recipient" addresses as well.
2937 -Mar add recipient(s)
2938 -MG move to a different queue
2939 -Mmad mark all recipients delivered
2940 -Mmd mark recipients(s) delivered
2942 -Mset load a message for use with -be
2944 -Mvc show copy (of whole message, in RFC 2822 format)
2951 msg_action = MSG_DELIVER;
2952 forced_delivery = f.deliver_force_thaw = TRUE;
2954 else if (Ustrcmp(argrest, "ar") == 0)
2956 msg_action = MSG_ADD_RECIPIENT;
2957 one_msg_action = TRUE;
2959 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2960 else if (Ustrcmp(argrest, "es") == 0)
2962 msg_action = MSG_EDIT_SENDER;
2963 one_msg_action = TRUE;
2965 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2966 else if (Ustrcmp(argrest, "g") == 0)
2968 msg_action = MSG_DELIVER;
2969 deliver_give_up = TRUE;
2971 else if (Ustrcmp(argrest, "G") == 0)
2973 msg_action = MSG_SETQUEUE;
2974 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
2976 else if (Ustrcmp(argrest, "mad") == 0)
2978 msg_action = MSG_MARK_ALL_DELIVERED;
2980 else if (Ustrcmp(argrest, "md") == 0)
2982 msg_action = MSG_MARK_DELIVERED;
2983 one_msg_action = TRUE;
2985 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2986 else if (Ustrcmp(argrest, "set") == 0)
2988 msg_action = MSG_LOAD;
2989 one_msg_action = TRUE;
2991 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2992 else if (Ustrcmp(argrest, "vb") == 0)
2994 msg_action = MSG_SHOW_BODY;
2995 one_msg_action = TRUE;
2997 else if (Ustrcmp(argrest, "vc") == 0)
2999 msg_action = MSG_SHOW_COPY;
3000 one_msg_action = TRUE;
3002 else if (Ustrcmp(argrest, "vh") == 0)
3004 msg_action = MSG_SHOW_HEADER;
3005 one_msg_action = TRUE;
3007 else if (Ustrcmp(argrest, "vl") == 0)
3009 msg_action = MSG_SHOW_LOG;
3010 one_msg_action = TRUE;
3012 else { badarg = TRUE; break; }
3014 /* All the -Mxx options require at least one message id. */
3016 msg_action_arg = i + 1;
3017 if (msg_action_arg >= argc)
3018 exim_fail("exim: no message ids given after %s option\n", arg);
3020 /* Some require only message ids to follow */
3022 if (!one_msg_action)
3024 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3025 exim_fail("exim: malformed message id %s after %s option\n",
3027 goto END_ARG; /* Remaining args are ids */
3030 /* Others require only one message id, possibly followed by addresses,
3031 which will be handled as normal arguments. */
3035 if (!mac_ismsgid(argv[msg_action_arg]))
3036 exim_fail("exim: malformed message id %s after %s option\n",
3037 argv[msg_action_arg], arg);
3043 /* Some programs seem to call the -om option without the leading o;
3044 for sendmail it askes for "me too". Exim always does this. */
3047 if (*argrest) badarg = TRUE;
3051 /* -N: don't do delivery - a debugging option that stops transports doing
3052 their thing. It implies debugging at the D_v level. */
3057 f.dont_deliver = TRUE;
3058 debug_selector |= D_v;
3059 debug_file = stderr;
3065 /* -n: This means "don't alias" in sendmail, apparently.
3066 For normal invocations, it has no effect.
3067 It may affect some other options. */
3073 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3074 option to the specified value. This form uses long names. We need to handle
3075 -O option=value and -Ooption=value. */
3080 exim_fail("exim: string expected after -O\n");
3086 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3089 if (!*(alias_arg = argrest))
3090 if (i+1 < argc) alias_arg = argv[++i];
3091 else exim_fail("exim: string expected after -oA\n");
3094 /* -oB: Set a connection message max value for remote deliveries */
3097 uschar * p = argrest;
3099 if (i+1 < argc && isdigit((argv[i+1][0])))
3103 connection_max_messages = 1;
3110 exim_fail("exim: number expected after -oB\n");
3111 connection_max_messages = Uatoi(p);
3116 /* -odb: background delivery */
3119 if (Ustrcmp(argrest, "b") == 0)
3121 f.synchronous_delivery = FALSE;
3122 arg_queue_only = FALSE;
3123 queue_only_set = TRUE;
3126 /* -odd: testsuite-only: add no inter-process delays */
3128 else if (Ustrcmp(argrest, "d") == 0)
3129 f.testsuite_delays = FALSE;
3131 /* -odf: foreground delivery (smail-compatible option); same effect as
3132 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3135 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3137 f.synchronous_delivery = TRUE;
3138 arg_queue_only = FALSE;
3139 queue_only_set = TRUE;
3142 /* -odq: queue only */
3144 else if (Ustrcmp(argrest, "q") == 0)
3146 f.synchronous_delivery = FALSE;
3147 arg_queue_only = TRUE;
3148 queue_only_set = TRUE;
3151 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3152 but no remote delivery */
3154 else if (Ustrcmp(argrest, "qs") == 0)
3156 f.queue_smtp = TRUE;
3157 arg_queue_only = FALSE;
3158 queue_only_set = TRUE;
3163 /* -oex: Sendmail error flags. As these are also accepted without the
3164 leading -o prefix, for compatibility with vacation and other callers,
3165 they are handled with -e above. */
3167 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3168 -oitrue: Another sendmail syntax for the same */
3171 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3176 /* -oM*: Set various characteristics for an incoming message; actually
3177 acted on for trusted callers only. */
3182 exim_fail("exim: data expected after -oM%s\n", argrest);
3184 /* -oMa: Set sender host address */
3186 if (Ustrcmp(argrest, "a") == 0)
3187 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3189 /* -oMaa: Set authenticator name */
3191 else if (Ustrcmp(argrest, "aa") == 0)
3192 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3194 /* -oMas: setting authenticated sender */
3196 else if (Ustrcmp(argrest, "as") == 0)
3197 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3199 /* -oMai: setting authenticated id */
3201 else if (Ustrcmp(argrest, "ai") == 0)
3202 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3204 /* -oMi: Set incoming interface address */
3206 else if (Ustrcmp(argrest, "i") == 0)
3207 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3209 /* -oMm: Message reference */
3211 else if (Ustrcmp(argrest, "m") == 0)
3213 if (!mac_ismsgid(argv[i+1]))
3214 exim_fail("-oMm must be a valid message ID\n");
3215 if (!f.trusted_config)
3216 exim_fail("-oMm must be called by a trusted user/config\n");
3217 message_reference = argv[++i];
3220 /* -oMr: Received protocol */
3222 else if (Ustrcmp(argrest, "r") == 0)
3224 if (received_protocol)
3225 exim_fail("received_protocol is set already\n");
3227 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3229 /* -oMs: Set sender host name */
3231 else if (Ustrcmp(argrest, "s") == 0)
3232 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3234 /* -oMt: Set sender ident */
3236 else if (Ustrcmp(argrest, "t") == 0)
3238 sender_ident_set = TRUE;
3239 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3242 /* Else a bad argument */
3249 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3250 seem to call this as -m (undocumented), so that is also accepted (see
3252 /* -oo: An ancient flag for old-style addresses which still seems to
3253 crop up in some calls (see in SCO). */
3257 if (*argrest) badarg = TRUE;
3260 /* -oP <name>: set pid file path for daemon
3261 -oPX: delete pid file of daemon */
3264 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3265 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3266 "(uid=%d euid=%d | %d)\n",
3267 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3268 if (!*argrest) override_pid_file_path = argv[++i];
3269 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3274 /* -or <n>: set timeout for non-SMTP acceptance
3275 -os <n>: set timeout for SMTP acceptance */
3280 int * tp = argrest[-1] == 'r'
3281 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3283 *tp = readconf_readtime(argrest, 0, FALSE);
3284 else if (i+1 < argc)
3285 *tp = readconf_readtime(argv[++i], 0, FALSE);
3288 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3292 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3293 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3296 if (*argrest) badarg = TRUE;
3297 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3300 /* -oY: Override creation of daemon notifier socket */
3303 if (*argrest) badarg = TRUE;
3304 else notifier_socket = NULL;
3307 /* Unknown -o argument */
3315 /* -ps: force Perl startup; -pd force delayed Perl startup */
3319 if (*argrest == 's' && argrest[1] == 0)
3321 perl_start_option = 1;
3324 if (*argrest == 'd' && argrest[1] == 0)
3326 perl_start_option = -1;
3331 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3332 which sets the host protocol and host name */
3335 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3339 uschar * hn = Ustrchr(argrest, ':');
3341 if (received_protocol)
3342 exim_fail("received_protocol is set already\n");
3345 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3348 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3349 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3350 sender_host_name = string_copy_taint(hn + 1, TRUE);
3357 receiving_message = FALSE;
3358 if (queue_interval >= 0)
3359 exim_fail("exim: -q specified more than once\n");
3361 /* -qq...: Do queue runs in a 2-stage manner */
3363 if (*argrest == 'q')
3365 f.queue_2stage = TRUE;
3369 /* -qi...: Do only first (initial) deliveries */
3371 if (*argrest == 'i')
3373 f.queue_run_first_delivery = TRUE;
3377 /* -qf...: Run the queue, forcing deliveries
3378 -qff..: Ditto, forcing thawing as well */
3380 if (*argrest == 'f')
3382 f.queue_run_force = TRUE;
3383 if (*++argrest == 'f')
3385 f.deliver_force_thaw = TRUE;
3390 /* -q[f][f]l...: Run the queue only on local deliveries */
3392 if (*argrest == 'l')
3394 f.queue_run_local = TRUE;
3398 /* -q[f][f][l][G<name>]... Work on the named queue */
3400 if (*argrest == 'G')
3403 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3404 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3405 queue_name = string_copyn(argrest, i);
3407 if (*argrest == '/') argrest++;
3410 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3411 only, optionally named, optionally starting from a given message id. */
3413 if (!(list_queue || count_queue))
3415 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3418 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3419 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3420 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3421 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3424 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3425 forced, optionally local only, optionally named. */
3427 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3429 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3433 case 'R': /* Synonymous with -qR... */
3435 const uschar *tainted_selectstr;
3437 receiving_message = FALSE;
3439 /* -Rf: As -R (below) but force all deliveries,
3440 -Rff: Ditto, but also thaw all frozen messages,
3441 -Rr: String is regex
3442 -Rrf: Regex and force
3443 -Rrff: Regex and force and thaw
3445 in all cases provided there are no further characters in this
3449 for (int i = 0; i < nelem(rsopts); i++)
3450 if (Ustrcmp(argrest, rsopts[i]) == 0)
3452 if (i != 2) f.queue_run_force = TRUE;
3453 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3454 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3455 argrest += Ustrlen(rsopts[i]);
3458 /* -R: Set string to match in addresses for forced queue run to
3459 pick out particular messages. */
3461 /* Avoid attacks from people providing very long strings, and do so before
3464 tainted_selectstr = argrest;
3465 else if (i+1 < argc)
3466 tainted_selectstr = argv[++i];
3468 exim_fail("exim: string expected after -R\n");
3469 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3473 /* -r: an obsolete synonym for -f (see above) */
3476 /* -S: Like -R but works on sender. */
3478 case 'S': /* Synonymous with -qS... */
3480 const uschar *tainted_selectstr;
3482 receiving_message = FALSE;
3484 /* -Sf: As -S (below) but force all deliveries,
3485 -Sff: Ditto, but also thaw all frozen messages,
3486 -Sr: String is regex
3487 -Srf: Regex and force
3488 -Srff: Regex and force and thaw
3490 in all cases provided there are no further characters in this
3494 for (int i = 0; i < nelem(rsopts); i++)
3495 if (Ustrcmp(argrest, rsopts[i]) == 0)
3497 if (i != 2) f.queue_run_force = TRUE;
3498 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3499 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3500 argrest += Ustrlen(rsopts[i]);
3503 /* -S: Set string to match in addresses for forced queue run to
3504 pick out particular messages. */
3507 tainted_selectstr = argrest;
3508 else if (i+1 < argc)
3509 tainted_selectstr = argv[++i];
3511 exim_fail("exim: string expected after -S\n");
3512 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3516 /* -Tqt is an option that is exclusively for use by the testing suite.
3517 It is not recognized in other circumstances. It allows for the setting up
3518 of explicit "queue times" so that various warning/retry things can be
3519 tested. Otherwise variability of clock ticks etc. cause problems. */
3522 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3523 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3528 /* -t: Set flag to extract recipients from body of message. */
3531 if (!*argrest) extract_recipients = TRUE;
3533 /* -ti: Set flag to extract recipients from body of message, and also
3534 specify that dot does not end the message. */
3536 else if (Ustrcmp(argrest, "i") == 0)
3538 extract_recipients = TRUE;
3542 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3545 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3552 /* -U: This means "initial user submission" in sendmail, apparently. The
3553 doc claims that in future sendmail may refuse syntactically invalid
3554 messages instead of fixing them. For the moment, we just ignore it. */
3560 /* -v: verify things - this is a very low-level debugging */
3565 debug_selector |= D_v;
3566 debug_file = stderr;
3572 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3574 The -x flag tells the sendmail command that mail from a local
3575 mail program has National Language Support (NLS) extended characters
3576 in the body of the mail item. The sendmail command can send mail with
3577 extended NLS characters across networks that normally corrupts these
3580 As Exim is 8-bit clean, it just ignores this flag. */
3583 if (*argrest) badarg = TRUE;
3586 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3587 logs to that file. We swallow the parameter and otherwise ignore it. */
3592 exim_fail("exim: string expected after -X\n");
3595 /* -z: a line of text to log */
3600 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3602 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3605 /* All other initial characters are errors */
3610 } /* End of high-level switch statement */
3612 /* Failed to recognize the option, or syntax error */
3615 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3616 "option %s\n", arg);
3620 /* If -R or -S have been specified without -q, assume a single queue run. */
3622 if ( (deliver_selectstring || deliver_selectstring_sender)
3623 && queue_interval < 0)
3628 store_pool = old_pool;
3631 /* If usage_wanted is set we call the usage function - which never returns */
3632 if (usage_wanted) exim_usage(called_as);
3634 /* Arguments have been processed. Check for incompatibilities. */
3635 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3636 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3637 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3638 || filter_test != FTEST_NONE
3639 || msg_action_arg > 0 && !one_msg_action
3641 || ( msg_action_arg > 0
3642 && ( f.daemon_listen || queue_interval > 0 || list_options
3643 || checking && msg_action != MSG_LOAD
3644 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3646 || ( (f.daemon_listen || queue_interval > 0)
3647 && ( sender_address || list_options || list_queue || checking
3650 || f.daemon_listen && queue_interval == 0
3651 || f.inetd_wait_mode && queue_interval >= 0
3653 && ( checking || smtp_input || extract_recipients
3654 || filter_test != FTEST_NONE || bi_option
3656 || ( verify_address_mode
3657 && ( f.address_test_mode || smtp_input || extract_recipients
3658 || filter_test != FTEST_NONE || bi_option
3660 || ( f.address_test_mode
3661 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3665 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3667 || deliver_selectstring && queue_interval < 0
3668 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3670 exim_fail("exim: incompatible command-line options or arguments\n");
3672 /* If debugging is set up, set the file and the file descriptor to pass on to
3673 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3674 to run in the foreground. */
3676 if (debug_selector != 0)
3678 debug_file = stderr;
3679 debug_fd = fileno(debug_file);
3680 f.background_daemon = FALSE;
3681 testharness_pause_ms(100); /* lets caller finish */
3682 if (debug_selector != D_v) /* -v only doesn't show this */
3684 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3685 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3687 if (!version_printed)
3688 show_whats_supported(stderr);
3692 /* When started with root privilege, ensure that the limits on the number of
3693 open files and the number of processes (where that is accessible) are
3694 sufficiently large, or are unset, in case Exim has been called from an
3695 environment where the limits are screwed down. Not all OS have the ability to
3696 change some of these limits. */
3700 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3706 #ifdef RLIMIT_NOFILE
3707 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3709 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3711 rlp.rlim_cur = rlp.rlim_max = 0;
3714 /* I originally chose 1000 as a nice big number that was unlikely to
3715 be exceeded. It turns out that some older OS have a fixed upper limit of
3718 if (rlp.rlim_cur < 1000)
3720 rlp.rlim_cur = rlp.rlim_max = 1000;
3721 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3723 rlp.rlim_cur = rlp.rlim_max = 256;
3724 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3725 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3732 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3734 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3736 rlp.rlim_cur = rlp.rlim_max = 0;
3739 # ifdef RLIM_INFINITY
3740 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3742 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3744 if (rlp.rlim_cur < 1000)
3746 rlp.rlim_cur = rlp.rlim_max = 1000;
3748 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3749 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3755 /* Exim is normally entered as root (but some special configurations are
3756 possible that don't do this). However, it always spins off sub-processes that
3757 set their uid and gid as required for local delivery. We don't want to pass on
3758 any extra groups that root may belong to, so we want to get rid of them all at
3761 We need to obey setgroups() at this stage, before possibly giving up root
3762 privilege for a changed configuration file, but later on we might need to
3763 check on the additional groups for the admin user privilege - can't do that
3764 till after reading the config, which might specify the exim gid. Therefore,
3765 save the group list here first. */
3767 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3768 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3770 /* There is a fundamental difference in some BSD systems in the matter of
3771 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3772 known not to be different. On the "different" systems there is a single group
3773 list, and the first entry in it is the current group. On all other versions of
3774 Unix there is a supplementary group list, which is in *addition* to the current
3775 group. Consequently, to get rid of all extraneous groups on a "standard" system
3776 you pass over 0 groups to setgroups(), while on a "different" system you pass
3777 over a single group - the current group, which is always the first group in the
3778 list. Calling setgroups() with zero groups on a "different" system results in
3779 an error return. The following code should cope with both types of system.
3781 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3782 the "setgroups() with zero groups" - and changes the egid.
3783 Thanks to that we had to stash the original_egid above, for use below
3784 in the call to exim_setugid().
3786 However, if this process isn't running as root, setgroups() can't be used
3787 since you have to be root to run it, even if throwing away groups.
3788 Except, sigh, for Hurd - where you can.
3789 Not being root here happens only in some unusual configurations. */
3792 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3793 && setgroups(0, NULL) != 0
3795 && setgroups(1, group_list) != 0)
3796 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3798 /* If the configuration file name has been altered by an argument on the
3799 command line (either a new file name or a macro definition) and the caller is
3800 not root, or if this is a filter testing run, remove any setuid privilege the
3801 program has and run as the underlying user.
3803 The exim user is locked out of this, which severely restricts the use of -C
3806 Otherwise, set the real ids to the effective values (should be root unless run
3807 from inetd, which it can either be root or the exim uid, if one is configured).
3809 There is a private mechanism for bypassing some of this, in order to make it
3810 possible to test lots of configurations automatically, without having either to
3811 recompile each time, or to patch in an actual configuration file name and other
3812 values (such as the path name). If running in the test harness, pretend that
3813 configuration file changes and macro definitions haven't happened. */
3816 (!f.trusted_config || /* Config changed, or */
3817 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3818 real_uid != root_uid && /* Not root, and */
3819 !f.running_in_test_harness /* Not fudged */
3821 expansion_test /* expansion testing */
3823 filter_test != FTEST_NONE) /* Filter testing */
3825 setgroups(group_count, group_list);
3826 exim_setugid(real_uid, real_gid, FALSE,
3827 US"-C, -D, -be or -bf forces real uid");
3828 removed_privilege = TRUE;
3830 /* In the normal case when Exim is called like this, stderr is available
3831 and should be used for any logging information because attempts to write
3832 to the log will usually fail. To arrange this, we unset really_exim. However,
3833 if no stderr is available there is no point - we might as well have a go
3834 at the log (if it fails, syslog will be written).
3836 Note that if the invoker is Exim, the logs remain available. Messing with
3837 this causes unlogged successful deliveries. */
3839 if (log_stderr && real_uid != exim_uid)
3840 f.really_exim = FALSE;
3843 /* Privilege is to be retained for the moment. It may be dropped later,
3844 depending on the job that this Exim process has been asked to do. For now, set
3845 the real uid to the effective so that subsequent re-execs of Exim are done by a
3849 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3851 /* If testing a filter, open the file(s) now, before wasting time doing other
3852 setups and reading the message. */
3854 if (filter_test & FTEST_SYSTEM)
3855 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3856 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3859 if (filter_test & FTEST_USER)
3860 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3861 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3864 /* Initialise lookup_list
3865 If debugging, already called above via version reporting.
3866 In either case, we initialise the list of available lookups while running
3867 as root. All dynamically modules are loaded from a directory which is
3868 hard-coded into the binary and is code which, if not a module, would be
3869 part of Exim already. Ability to modify the content of the directory
3870 is equivalent to the ability to modify a setuid binary!
3872 This needs to happen before we read the main configuration. */
3875 /*XXX this excrescence could move to the testsuite standard config setup file */
3877 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3880 /* Read the main runtime configuration data; this gives up if there
3881 is a failure. It leaves the configuration file open so that the subsequent
3882 configuration data for delivery can be read if needed.
3884 NOTE: immediately after opening the configuration file we change the working
3885 directory to "/"! Later we change to $spool_directory. We do it there, because
3886 during readconf_main() some expansion takes place already. */
3888 /* Store the initial cwd before we change directories. Can be NULL if the
3889 dir has already been unlinked. */
3890 initial_cwd = os_getcwd(NULL, 0);
3891 if (!initial_cwd && errno)
3892 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3894 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3895 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3898 -be[m] expansion test -
3899 -b[fF] filter test new
3901 -bmalware malware_test_file new
3903 -brw rewrite test new
3905 -bv[s] address verify -
3907 -bP <option> (except -bP config, which sets list_config)
3909 If any of these options is set, we suppress warnings about configuration
3910 issues (currently about tls_advertise_hosts and keep_environment not being
3914 int old_pool = store_pool;
3915 #ifdef MEASURE_TIMING
3916 struct timeval t0, diff;
3917 (void)gettimeofday(&t0, NULL);
3920 store_pool = POOL_CONFIG;
3921 readconf_main(checking || list_options);
3922 store_pool = old_pool;
3924 #ifdef MEASURE_TIMING
3925 report_time_since(&t0, US"readconf_main (delta)");
3929 /* Now in directory "/" */
3931 if (cleanup_environment() == FALSE)
3932 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3935 /* If an action on specific messages is requested, or if a daemon or queue
3936 runner is being started, we need to know if Exim was called by an admin user.
3937 This is the case if the real user is root or exim, or if the real group is
3938 exim, or if one of the supplementary groups is exim or a group listed in
3939 admin_groups. We don't fail all message actions immediately if not admin_user,
3940 since some actions can be performed by non-admin users. Instead, set admin_user
3941 for later interrogation. */
3943 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3944 f.admin_user = TRUE;
3946 for (int i = 0; i < group_count && !f.admin_user; i++)
3947 if (group_list[i] == exim_gid)
3948 f.admin_user = TRUE;
3949 else if (admin_groups)
3950 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3951 if (admin_groups[j] == group_list[i])
3952 f.admin_user = TRUE;
3954 /* Another group of privileged users are the trusted users. These are root,
3955 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3956 are permitted to specify sender_addresses with -f on the command line, and
3957 other message parameters as well. */
3959 if (real_uid == root_uid || real_uid == exim_uid)
3960 f.trusted_caller = TRUE;
3964 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3965 if (trusted_users[i] == real_uid)
3966 f.trusted_caller = TRUE;
3969 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3970 if (trusted_groups[i] == real_gid)
3971 f.trusted_caller = TRUE;
3972 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3973 if (trusted_groups[i] == group_list[j])
3974 f.trusted_caller = TRUE;
3977 /* At this point, we know if the user is privileged and some command-line
3978 options become possibly impermissible, depending upon the configuration file. */
3980 if (checking && commandline_checks_require_admin && !f.admin_user)
3981 exim_fail("exim: those command-line flags are set to require admin\n");
3983 /* Handle the decoding of logging options. */
3985 decode_bits(log_selector, log_selector_size, log_notall,
3986 log_selector_string, log_options, log_options_count, US"log", 0);
3990 debug_printf("configuration file is %s\n", config_main_filename);
3991 debug_printf("log selectors =");
3992 for (int i = 0; i < log_selector_size; i++)
3993 debug_printf(" %08x", log_selector[i]);
3997 /* If domain literals are not allowed, check the sender address that was
3998 supplied with -f. Ditto for a stripped trailing dot. */
4002 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
4003 exim_fail("exim: bad -f address \"%s\": domain literals not "
4004 "allowed\n", sender_address);
4005 if (f_end_dot && !strip_trailing_dot)
4006 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
4007 "(trailing dot not allowed)\n", sender_address);
4010 /* See if an admin user overrode our logging. */
4012 if (cmdline_syslog_name)
4015 syslog_processname = cmdline_syslog_name;
4016 log_file_path = string_copy(CUS"syslog");
4019 /* not a panic, non-privileged users should not be able to spam paniclog */
4021 "exim: you lack sufficient privilege to specify syslog process name\n");
4023 /* Paranoia check of maximum lengths of certain strings. There is a check
4024 on the length of the log file path in log.c, which will come into effect
4025 if there are any calls to write the log earlier than this. However, if we
4026 get this far but the string is very long, it is better to stop now than to
4027 carry on and (e.g.) receive a message and then have to collapse. The call to
4028 log_write() from here will cause the ultimate panic collapse if the complete
4029 file name exceeds the buffer length. */
4031 if (Ustrlen(log_file_path) > 200)
4032 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4033 "log_file_path is longer than 200 chars: aborting");
4035 if (Ustrlen(pid_file_path) > 200)
4036 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4037 "pid_file_path is longer than 200 chars: aborting");
4039 if (Ustrlen(spool_directory) > 200)
4040 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4041 "spool_directory is longer than 200 chars: aborting");
4043 /* Length check on the process name given to syslog for its TAG field,
4044 which is only permitted to be 32 characters or less. See RFC 3164. */
4046 if (Ustrlen(syslog_processname) > 32)
4047 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4048 "syslog_processname is longer than 32 chars: aborting");
4053 log_write(0, LOG_MAIN, "%s", log_oneline);
4054 return EXIT_SUCCESS;
4057 return EXIT_FAILURE;
4059 /* In some operating systems, the environment variable TMPDIR controls where
4060 temporary files are created; Exim doesn't use these (apart from when delivering
4061 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4062 If TMPDIR is found in the environment, reset it to the value defined in the
4063 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4064 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4065 EXIM_TMPDIR by the build scripts.
4069 if (environ) for (uschar ** p = USS environ; *p; p++)
4070 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4072 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4073 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4075 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4079 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4080 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4081 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4082 called by a user who has set the TZ variable. This then affects the timestamps
4083 in log files and in Received: headers, and any created Date: header lines. The
4084 required timezone is settable in the configuration file, so nothing can be done
4085 about this earlier - but hopefully nothing will normally be logged earlier than
4086 this. We have to make a new environment if TZ is wrong, but don't bother if
4087 timestamps_utc is set, because then all times are in UTC anyway. */
4089 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4090 f.timestamps_utc = TRUE;
4093 uschar *envtz = US getenv("TZ");
4095 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4096 : timezone_string != NULL
4099 uschar **p = USS environ;
4103 if (environ) while (*p++) count++;
4104 if (!envtz) count++;
4105 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4106 if (environ) for (p = USS environ; *p; p++)
4107 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4108 if (timezone_string)
4110 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4111 sprintf(CS *newp++, "TZ=%s", timezone_string);
4116 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4117 tod_stamp(tod_log));
4121 /* Handle the case when we have removed the setuid privilege because of -C or
4122 -D. This means that the caller of Exim was not root.
4124 There is a problem if we were running as the Exim user. The sysadmin may
4125 expect this case to retain privilege because "the binary was called by the
4126 Exim user", but it hasn't, because either the -D option set macros, or the
4127 -C option set a non-trusted configuration file. There are two possibilities:
4129 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4130 to do message deliveries. Thus, the fact that it is running as a
4131 non-privileged user is plausible, and might be wanted in some special
4132 configurations. However, really_exim will have been set false when
4133 privilege was dropped, to stop Exim trying to write to its normal log
4134 files. Therefore, re-enable normal log processing, assuming the sysadmin
4135 has set up the log directory correctly.
4137 (2) If deliver_drop_privilege is not set, the configuration won't work as
4138 apparently intended, and so we log a panic message. In order to retain
4139 root for -C or -D, the caller must either be root or be invoking a
4140 trusted configuration file (when deliver_drop_privilege is false). */
4142 if ( removed_privilege
4143 && (!f.trusted_config || opt_D_used)
4144 && real_uid == exim_uid)
4145 if (deliver_drop_privilege)
4146 f.really_exim = TRUE; /* let logging work normally */
4148 log_write(0, LOG_MAIN|LOG_PANIC,
4149 "exim user lost privilege for using %s option",
4150 f.trusted_config? "-D" : "-C");
4152 /* Start up Perl interpreter if Perl support is configured and there is a
4153 perl_startup option, and the configuration or the command line specifies
4154 initializing starting. Note that the global variables are actually called
4155 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4158 if (perl_start_option != 0)
4159 opt_perl_at_start = (perl_start_option > 0);
4160 if (opt_perl_at_start && opt_perl_startup != NULL)
4163 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4164 if ((errstr = init_perl(opt_perl_startup)))
4165 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4166 opt_perl_started = TRUE;
4168 #endif /* EXIM_PERL */
4170 /* Log the arguments of the call if the configuration file said so. This is
4171 a debugging feature for finding out what arguments certain MUAs actually use.
4172 Don't attempt it if logging is disabled, or if listing variables or if
4173 verifying/testing addresses or expansions. */
4175 if ( (debug_selector & D_any || LOGGING(arguments))
4176 && f.really_exim && !list_options && !checking)
4178 uschar *p = big_buffer;
4179 Ustrcpy(p, US"cwd= (failed)");
4186 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4187 p += Ustrlen(CCS p);
4190 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4192 for (int i = 0; i < argc; i++)
4194 int len = Ustrlen(argv[i]);
4195 const uschar *printing;
4197 if (p + len + 8 >= big_buffer + big_buffer_size)
4199 Ustrcpy(p, US" ...");
4200 log_write(0, LOG_MAIN, "%s", big_buffer);
4201 Ustrcpy(big_buffer, US"...");
4204 printing = string_printing(argv[i]);
4205 if (!*printing) quote = US"\"";
4208 const uschar *pp = printing;
4210 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4212 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4213 (p - big_buffer) - 4), printing, quote);
4216 if (LOGGING(arguments))
4217 log_write(0, LOG_MAIN, "%s", big_buffer);
4219 debug_printf("%s\n", big_buffer);
4222 /* Set the working directory to be the top-level spool directory. We don't rely
4223 on this in the code, which always uses fully qualified names, but it's useful
4224 for core dumps etc. Don't complain if it fails - the spool directory might not
4225 be generally accessible and calls with the -C option (and others) have lost
4226 privilege by now. Before the chdir, we try to ensure that the directory exists.
4229 if (Uchdir(spool_directory) != 0)
4231 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4232 (void) Uchdir(spool_directory);
4235 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4236 alias file. Exim doesn't have such a concept, but this call is screwed into
4237 Sun's YP makefiles. Handle this by calling a configured script, as the real
4238 user who called Exim. The -oA option can be used to pass an argument to the
4243 (void) fclose(config_file);
4244 if (bi_command && *bi_command)
4248 argv[i++] = bi_command;
4249 if (alias_arg) argv[i++] = alias_arg;
4252 setgroups(group_count, group_list);
4253 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4255 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4256 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4258 execv(CS argv[0], (char *const *)argv);
4259 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4263 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4268 /* We moved the admin/trusted check to be immediately after reading the
4269 configuration file. We leave these prints here to ensure that syslog setup,
4270 logfile setup, and so on has already happened. */
4272 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4273 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4275 /* Only an admin user may start the daemon or force a queue run in the default
4276 configuration, but the queue run restriction can be relaxed. Only an admin
4277 user may request that a message be returned to its sender forthwith. Only an
4278 admin user may specify a debug level greater than D_v (because it might show
4279 passwords, etc. in lookup queries). Only an admin user may request a queue
4280 count. Only an admin user can use the test interface to scan for email
4281 (because Exim will be in the spool dir and able to look at mails). */
4285 BOOL debugset = (debug_selector & ~D_v) != 0;
4286 if ( deliver_give_up || f.daemon_listen || malware_test_file
4287 || count_queue && queue_list_requires_admin
4288 || list_queue && queue_list_requires_admin
4289 || queue_interval >= 0 && prod_requires_admin
4290 || queue_name_dest && prod_requires_admin
4291 || debugset && !f.running_in_test_harness
4293 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4296 /* If the real user is not root or the exim uid, the argument for passing
4297 in an open TCP/IP connection for another message is not permitted, nor is
4298 running with the -N option for any delivery action, unless this call to exim is
4299 one that supplied an input message, or we are using a patched exim for
4300 regression testing. */
4302 if ( real_uid != root_uid && real_uid != exim_uid
4303 && ( continue_hostname
4305 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4307 && !f.running_in_test_harness
4309 exim_fail("exim: Permission denied\n");
4311 /* If the caller is not trusted, certain arguments are ignored when running for
4312 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4313 Note that authority for performing certain actions on messages is tested in the
4314 queue_action() function. */
4316 if (!f.trusted_caller && !checking)
4318 sender_host_name = sender_host_address = interface_address =
4319 sender_ident = received_protocol = NULL;
4320 sender_host_port = interface_port = 0;
4321 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4324 /* If a sender host address is set, extract the optional port number off the
4325 end of it and check its syntax. Do the same thing for the interface address.
4326 Exim exits if the syntax is bad. */
4330 if (sender_host_address)
4331 sender_host_port = check_port(sender_host_address);
4332 if (interface_address)
4333 interface_port = check_port(interface_address);
4336 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4339 if (f.trusted_caller)
4341 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4342 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4345 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4348 /* If an SMTP message is being received check to see if the standard input is a
4349 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4350 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4355 union sockaddr_46 inetd_sock;
4356 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4357 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4359 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4360 if (family == AF_INET || family == AF_INET6)
4362 union sockaddr_46 interface_sock;
4363 size = sizeof(interface_sock);
4365 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4366 interface_address = host_ntoa(-1, &interface_sock, NULL,
4369 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4371 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4374 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4375 NULL, &sender_host_port);
4376 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4377 "inetd is not supported when mua_wrapper is set");
4381 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4386 /* If the load average is going to be needed while receiving a message, get it
4387 now for those OS that require the first call to os_getloadavg() to be done as
4388 root. There will be further calls later for each message received. */
4390 #ifdef LOAD_AVG_NEEDS_ROOT
4391 if ( receiving_message
4392 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4393 load_average = OS_GETLOADAVG();
4396 /* The queue_only configuration option can be overridden by -odx on the command
4397 line, except that if queue_only_override is false, queue_only cannot be unset
4398 from the command line. */
4400 if (queue_only_set && (queue_only_override || arg_queue_only))
4401 queue_only = arg_queue_only;
4403 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4406 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4407 if (arg_smtp_receive_timeout >= 0)
4408 smtp_receive_timeout = arg_smtp_receive_timeout;
4410 /* If Exim was started with root privilege, unless we have already removed the
4411 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4412 except when starting the daemon or doing some kind of delivery or address
4413 testing (-bt). These are the only cases when root need to be retained. We run
4414 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4415 retained only for starting the daemon. We always do the initgroups() in this
4416 situation (controlled by the TRUE below), in order to be as close as possible
4417 to the state Exim usually runs in. */
4419 if ( !unprivileged /* originally had root AND */
4420 && !removed_privilege /* still got root AND */
4421 && !f.daemon_listen /* not starting the daemon */
4422 && queue_interval <= 0 /* (either kind of daemon) */
4423 && ( /* AND EITHER */
4424 deliver_drop_privilege /* requested unprivileged */
4426 queue_interval < 0 /* not running the queue */
4427 && ( msg_action_arg < 0 /* and */
4428 || msg_action != MSG_DELIVER /* not delivering */
4430 && (!checking || !f.address_test_mode) /* not address checking */
4431 && !rcpt_verify_quota /* and not quota checking */
4433 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4435 /* When we are retaining a privileged uid, we still change to the exim gid. */
4440 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4441 rv = setgid(exim_gid);
4442 /* Impact of failure is that some stuff might end up with an incorrect group.
4443 We track this for failures from root, since any attempt to change privilege
4444 by root should succeed and failures should be examined. For non-root,
4445 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4446 no need to complain then. */
4448 if (!(unprivileged || removed_privilege))
4449 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4452 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4453 (long int)exim_gid, strerror(errno));
4457 /* Handle a request to scan a file for malware */
4458 if (malware_test_file)
4460 #ifdef WITH_CONTENT_SCAN
4462 set_process_info("scanning file for malware");
4463 if ((result = malware_in_file(malware_test_file)) == FAIL)
4465 printf("No malware found.\n");
4470 printf("Malware lookup returned non-okay/fail: %d\n", result);
4474 printf("Malware found: %s\n", malware_name);
4476 printf("Malware scan detected malware of unknown name.\n");
4478 printf("Malware scanning not enabled at compile time.\n");
4483 /* Handle a request to list the delivery queue */
4487 set_process_info("listing the queue");
4488 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4492 /* Handle a request to count the delivery queue */
4496 set_process_info("counting the queue");
4497 fprintf(stdout, "%u\n", queue_count());
4501 /* Handle actions on specific messages, except for the force delivery and
4502 message load actions, which are done below. Some actions take a whole list of
4503 message ids, which are known to continue up to the end of the arguments. Others
4504 take a single message id and then operate on the recipients list. */
4506 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4508 int yield = EXIT_SUCCESS;
4509 set_process_info("acting on specified messages");
4511 /* ACL definitions may be needed when removing a message (-Mrm) because
4512 event_action gets expanded */
4514 if (msg_action == MSG_REMOVE)
4516 int old_pool = store_pool;
4517 store_pool = POOL_CONFIG;
4519 store_pool = old_pool;
4520 store_writeprotect(POOL_CONFIG);
4523 if (!one_msg_action)
4525 for (i = msg_action_arg; i < argc; i++)
4526 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4527 yield = EXIT_FAILURE;
4530 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4531 default: printf("\n"); break;
4535 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4536 recipients_arg)) yield = EXIT_FAILURE;
4540 /* We used to set up here to skip reading the ACL section, on
4541 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4542 Now, since the intro of the ${acl } expansion, ACL definitions may be
4543 needed in transports so we lost the optimisation. */
4546 int old_pool = store_pool;
4547 #ifdef MEASURE_TIMING
4548 struct timeval t0, diff;
4549 (void)gettimeofday(&t0, NULL);
4552 store_pool = POOL_CONFIG;
4554 store_pool = old_pool;
4555 store_writeprotect(POOL_CONFIG);
4557 #ifdef MEASURE_TIMING
4558 report_time_since(&t0, US"readconf_rest (delta)");
4562 /* Handle a request to check quota */
4563 if (rcpt_verify_quota)
4564 if (real_uid != root_uid && real_uid != exim_uid)
4565 exim_fail("exim: Permission denied\n");
4566 else if (recipients_arg >= argc)
4567 exim_fail("exim: missing recipient for quota check\n");
4570 verify_quota(argv[recipients_arg]);
4571 exim_exit(EXIT_SUCCESS);
4574 /* Handle the -brt option. This is for checking out retry configurations.
4575 The next three arguments are a domain name or a complete address, and
4576 optionally two error numbers. All it does is to call the function that
4577 scans the retry configuration data. */
4579 if (test_retry_arg >= 0)
4581 retry_config *yield;
4582 int basic_errno = 0;
4584 const uschar *s1, *s2;
4586 if (test_retry_arg >= argc)
4588 printf("-brt needs a domain or address argument\n");
4589 exim_exit(EXIT_FAILURE);
4591 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4594 /* If the first argument contains no @ and no . it might be a local user
4595 or it might be a single-component name. Treat as a domain. */
4597 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4599 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4600 "being \ntreated as a one-component domain, not as a local part.\n\n",
4604 /* There may be an optional second domain arg. */
4606 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4607 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4609 /* The final arg is an error name */
4611 if (test_retry_arg < argc)
4613 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4615 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4618 printf("%s\n", CS error);
4619 return EXIT_FAILURE;
4622 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4623 code > 100 as an error is for matching codes to the decade. Turn them into
4624 a real error code, off the decade. */
4626 if (basic_errno == ERRNO_MAIL4XX ||
4627 basic_errno == ERRNO_RCPT4XX ||
4628 basic_errno == ERRNO_DATA4XX)
4630 int code = (more_errno >> 8) & 255;
4632 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4633 else if (code > 100)
4634 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4638 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4639 printf("No retry information found\n");
4642 more_errno = yield->more_errno;
4643 printf("Retry rule: %s ", yield->pattern);
4645 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4647 printf("quota%s%s ",
4648 (more_errno > 0)? "_" : "",
4649 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4651 else if (yield->basic_errno == ECONNREFUSED)
4653 printf("refused%s%s ",
4654 (more_errno > 0)? "_" : "",
4655 (more_errno == 'M')? "MX" :
4656 (more_errno == 'A')? "A" : "");
4658 else if (yield->basic_errno == ETIMEDOUT)
4661 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4663 if (more_errno != 0) printf("_%s",
4664 (more_errno == 'M')? "MX" : "A");
4667 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4668 printf("auth_failed ");
4671 for (retry_rule * r = yield->rules; r; r = r->next)
4673 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4674 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4680 printf(",%d.", x/1000);
4694 exim_exit(EXIT_SUCCESS);
4697 /* Handle a request to list one or more configuration options */
4698 /* If -n was set, we suppress some information */
4703 set_process_info("listing variables");
4704 if (recipients_arg >= argc)
4705 fail = !readconf_print(US"all", NULL, flag_n);
4706 else for (i = recipients_arg; i < argc; i++)
4709 (Ustrcmp(argv[i], "router") == 0 ||
4710 Ustrcmp(argv[i], "transport") == 0 ||
4711 Ustrcmp(argv[i], "authenticator") == 0 ||
4712 Ustrcmp(argv[i], "macro") == 0 ||
4713 Ustrcmp(argv[i], "environment") == 0))
4715 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4719 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4721 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4726 set_process_info("listing config");
4727 exim_exit(readconf_print(US"config", NULL, flag_n)
4728 ? EXIT_SUCCESS : EXIT_FAILURE);
4732 /* Initialise subsystems as required. */
4736 /* Handle a request to deliver one or more messages that are already on the
4737 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4738 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4740 Delivery of specific messages is typically used for a small number when
4741 prodding by hand (when the option forced_delivery will be set) or when
4742 re-execing to regain root privilege. Each message delivery must happen in a
4743 separate process, so we fork a process for each one, and run them sequentially
4744 so that debugging output doesn't get intertwined, and to avoid spawning too
4745 many processes if a long list is given. However, don't fork for the last one;
4746 this saves a process in the common case when Exim is called to deliver just one
4749 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4751 if (prod_requires_admin && !f.admin_user)
4753 fprintf(stderr, "exim: Permission denied\n");
4754 exim_exit(EXIT_FAILURE);
4756 set_process_info("delivering specified messages");
4757 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4758 for (i = msg_action_arg; i < argc; i++)
4762 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4763 that runs into a later copy into the untainted global message_id[] */
4764 /*XXX Do we need a length limit check here? */
4766 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4767 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4769 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4770 exim_underbar_exit(EXIT_SUCCESS);
4774 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4776 exim_exit(EXIT_FAILURE);
4780 exim_exit(EXIT_SUCCESS);
4784 /* If only a single queue run is requested, without SMTP listening, we can just
4785 turn into a queue runner, with an optional starting message id. */
4787 if (queue_interval == 0 && !f.daemon_listen)
4789 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4790 start_queue_run_id ? US" starting at " : US"",
4791 start_queue_run_id ? start_queue_run_id: US"",
4792 stop_queue_run_id ? US" stopping at " : US"",
4793 stop_queue_run_id ? stop_queue_run_id : US"");
4795 set_process_info("running the '%s' queue (single queue run)", queue_name);
4797 set_process_info("running the queue (single queue run)");
4798 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4799 exim_exit(EXIT_SUCCESS);
4803 /* Find the login name of the real user running this process. This is always
4804 needed when receiving a message, because it is written into the spool file. It
4805 may also be used to construct a from: or a sender: header, and in this case we
4806 need the user's full name as well, so save a copy of it, checked for RFC822
4807 syntax and munged if necessary, if it hasn't previously been set by the -F
4808 argument. We may try to get the passwd entry more than once, in case NIS or
4809 other delays are in evidence. Save the home directory for use in filter testing
4814 if ((pw = getpwuid(real_uid)) != NULL)
4816 originator_login = string_copy(US pw->pw_name);
4817 originator_home = string_copy(US pw->pw_dir);
4819 /* If user name has not been set by -F, set it from the passwd entry
4820 unless -f has been used to set the sender address by a trusted user. */
4822 if (!originator_name)
4824 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4826 uschar *name = US pw->pw_gecos;
4827 uschar *amp = Ustrchr(name, '&');
4830 /* Most Unix specify that a '&' character in the gecos field is
4831 replaced by a copy of the login name, and some even specify that
4832 the first character should be upper cased, so that's what we do. */
4837 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4838 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4839 buffer[loffset] = toupper(buffer[loffset]);
4843 /* If a pattern for matching the gecos field was supplied, apply
4844 it and then expand the name string. */
4846 if (gecos_pattern && gecos_name)
4849 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4851 if (regex_match_and_setup(re, name, 0, -1))
4853 uschar *new_name = expand_string(gecos_name);
4857 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4858 "gecos field \"%s\"\n", new_name, name);
4861 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4862 "\"%s\": %s\n", gecos_name, expand_string_message);
4864 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4865 "gecos field \"%s\"\n", gecos_pattern, name);
4866 store_free((void *)re);
4868 originator_name = string_copy(name);
4871 /* A trusted caller has used -f but not -F */
4873 else originator_name = US"";
4876 /* Break the retry loop */
4881 if (++i > finduser_retries) break;
4885 /* If we cannot get a user login, log the incident and give up, unless the
4886 configuration specifies something to use. When running in the test harness,
4887 any setting of unknown_login overrides the actual name. */
4889 if (!originator_login || f.running_in_test_harness)
4893 originator_login = expand_string(unknown_login);
4894 if (!originator_name && unknown_username)
4895 originator_name = expand_string(unknown_username);
4896 if (!originator_name) originator_name = US"";
4898 if (!originator_login)
4899 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4903 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4906 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4908 /* If a message is created by this call of Exim, the uid/gid of its originator
4909 are those of the caller. These values are overridden if an existing message is
4910 read in from the spool. */
4912 originator_uid = real_uid;
4913 originator_gid = real_gid;
4915 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4916 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4918 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4919 returns. We leave this till here so that the originator_ fields are available
4920 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4923 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4927 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4928 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4929 "mua_wrapper is set");
4932 # ifndef DISABLE_TLS
4933 /* This also checks that the library linkage is working and we can call
4934 routines in it, so call even if tls_require_ciphers is unset */
4936 # ifdef MEASURE_TIMING
4937 struct timeval t0, diff;
4938 (void)gettimeofday(&t0, NULL);
4940 if (!tls_dropprivs_validate_require_cipher(FALSE))
4942 # ifdef MEASURE_TIMING
4943 report_time_since(&t0, US"validate_ciphers (delta)");
4951 /* If the sender ident has not been set (by a trusted caller) set it to
4952 the caller. This will get overwritten below for an inetd call. If a trusted
4953 caller has set it empty, unset it. */
4955 if (!sender_ident) sender_ident = originator_login;
4956 else if (!*sender_ident) sender_ident = NULL;
4958 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4959 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4960 originator_* variables set. */
4962 if (test_rewrite_arg >= 0)
4964 f.really_exim = FALSE;
4965 if (test_rewrite_arg >= argc)
4967 printf("-brw needs an address argument\n");
4968 exim_exit(EXIT_FAILURE);
4970 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
4971 exim_exit(EXIT_SUCCESS);
4974 /* A locally-supplied message is considered to be coming from a local user
4975 unless a trusted caller supplies a sender address with -f, or is passing in the
4976 message via SMTP (inetd invocation or otherwise). */
4978 if ( !sender_address && !smtp_input
4979 || !f.trusted_caller && filter_test == FTEST_NONE)
4981 f.sender_local = TRUE;
4983 /* A trusted caller can supply authenticated_sender and authenticated_id
4984 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4985 defaults except when host checking. */
4987 if (!authenticated_sender && !host_checking)
4988 authenticated_sender = string_sprintf("%s@%s", originator_login,
4989 qualify_domain_sender);
4990 if (!authenticated_id && !host_checking)
4991 authenticated_id = originator_login;
4994 /* Trusted callers are always permitted to specify the sender address.
4995 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4996 is specified is the empty address. However, if a trusted caller does not
4997 specify a sender address for SMTP input, we leave sender_address unset. This
4998 causes the MAIL commands to be honoured. */
5000 if ( !smtp_input && !sender_address
5001 || !receive_check_set_sender(sender_address))
5003 /* Either the caller is not permitted to set a general sender, or this is
5004 non-SMTP input and the trusted caller has not set a sender. If there is no
5005 sender, or if a sender other than <> is set, override with the originator's
5006 login (which will get qualified below), except when checking things. */
5008 if ( !sender_address /* No sender_address set */
5010 (sender_address[0] != 0 && /* Non-empty sender address, AND */
5011 !checking)) /* Not running tests, including filter tests */
5013 sender_address = originator_login;
5014 f.sender_address_forced = FALSE;
5015 sender_address_domain = 0;
5019 /* Remember whether an untrusted caller set the sender address */
5021 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5023 /* Ensure that the sender address is fully qualified unless it is the empty
5024 address, which indicates an error message, or doesn't exist (root caller, smtp
5025 interface, no -f argument). */
5027 if (sender_address && *sender_address && sender_address_domain == 0)
5028 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5029 qualify_domain_sender);
5031 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5033 /* Handle a request to verify a list of addresses, or test them for delivery.
5034 This must follow the setting of the sender address, since routers can be
5035 predicated upon the sender. If no arguments are given, read addresses from
5036 stdin. Set debug_level to at least D_v to get full output for address testing.
5039 if (verify_address_mode || f.address_test_mode)
5042 int flags = vopt_qualify;
5044 if (verify_address_mode)
5046 if (!verify_as_sender) flags |= vopt_is_recipient;
5047 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5052 flags |= vopt_is_recipient;
5053 debug_selector |= D_v;
5054 debug_file = stderr;
5055 debug_fd = fileno(debug_file);
5056 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5059 if (recipients_arg < argc)
5060 while (recipients_arg < argc)
5062 /* Supplied addresses are tainted since they come from a user */
5063 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5066 BOOL finished = FALSE;
5067 uschar *ss = parse_find_address_end(s, FALSE);
5068 if (*ss == ',') *ss = 0; else finished = TRUE;
5069 test_address(s, flags, &exit_value);
5072 while (*++s == ',' || isspace(*s)) ;
5078 uschar * s = get_stdinput(NULL, NULL);
5080 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5084 exim_exit(exit_value);
5087 /* Handle expansion checking. Either expand items on the command line, or read
5088 from stdin if there aren't any. If -Mset was specified, load the message so
5089 that its variables can be used, but restrict this facility to admin users.
5090 Otherwise, if -bem was used, read a message from stdin. */
5094 dns_init(FALSE, FALSE, FALSE);
5095 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5099 exim_fail("exim: permission denied\n");
5100 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5101 /* Checking the length of the ID is sufficient to validate it.
5102 Get an untainted version so file opens can be done. */
5103 message_id = string_copy_taint(message_id, FALSE);
5105 spoolname = string_sprintf("%s-H", message_id);
5106 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5107 printf ("Failed to load message datafile %s\n", message_id);
5108 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5109 printf ("Failed to load message %s\n", message_id);
5112 /* Read a test message from a file. We fudge it up to be on stdin, saving
5113 stdin itself for later reading of expansion strings. */
5115 else if (expansion_test_message)
5117 int save_stdin = dup(0);
5118 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5120 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5123 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5124 message_ended = END_NOTENDED;
5125 read_message_body(receive_msg(extract_recipients));
5126 message_linecount += body_linecount;
5127 (void)dup2(save_stdin, 0);
5128 (void)close(save_stdin);
5129 clearerr(stdin); /* Required by Darwin */
5132 /* Only admin users may see config-file macros this way */
5134 if (!f.admin_user) macros_user = macros = mlast = NULL;
5136 /* Allow $recipients for this testing */
5138 f.enable_dollar_recipients = TRUE;
5140 /* Expand command line items */
5142 if (recipients_arg < argc)
5143 while (recipients_arg < argc)
5144 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5150 char *(*fn_readline)(const char *) = NULL;
5151 void (*fn_addhist)(const char *) = NULL;
5155 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5158 while (s = get_stdinput(fn_readline, fn_addhist))
5159 expansion_test_line(s);
5162 if (dlhandle) dlclose(dlhandle);
5166 /* The data file will be open after -Mset */
5168 if (deliver_datafile >= 0)
5170 (void)close(deliver_datafile);
5171 deliver_datafile = -1;
5174 exim_exit(EXIT_SUCCESS);
5178 /* The active host name is normally the primary host name, but it can be varied
5179 for hosts that want to play several parts at once. We need to ensure that it is
5180 set for host checking, and for receiving messages. */
5182 smtp_active_hostname = primary_hostname;
5183 if (raw_active_hostname != NULL)
5185 uschar *nah = expand_string(raw_active_hostname);
5188 if (!f.expand_string_forcedfail)
5189 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5190 "(smtp_active_hostname): %s", raw_active_hostname,
5191 expand_string_message);
5193 else if (nah[0] != 0) smtp_active_hostname = nah;
5196 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5197 given IP address so that the blocking and relay configuration can be tested.
5198 Unless a sender_ident was set by -oMt, we discard it (the default is the
5199 caller's login name). An RFC 1413 call is made only if we are running in the
5200 test harness and an incoming interface and both ports are specified, because
5201 there is no TCP/IP call to find the ident for. */
5208 if (!sender_ident_set)
5210 sender_ident = NULL;
5211 if (f.running_in_test_harness && sender_host_port
5212 && interface_address && interface_port)
5213 verify_get_ident(1223); /* note hardwired port number */
5216 /* In case the given address is a non-canonical IPv6 address, canonicalize
5217 it. The code works for both IPv4 and IPv6, as it happens. */
5219 size = host_aton(sender_host_address, x);
5220 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5221 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5223 /* Now set up for testing */
5225 host_build_sender_fullhost();
5229 f.sender_local = FALSE;
5230 f.sender_host_notsocket = TRUE;
5231 debug_file = stderr;
5232 debug_fd = fileno(debug_file);
5233 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5234 "**** but without any ident (RFC 1413) callback.\n"
5235 "**** This is not for real!\n\n",
5236 sender_host_address);
5238 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5239 if (verify_check_host(&hosts_connection_nolog) == OK)
5240 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5241 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5243 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5244 because a log line has already been written for all its failure exists
5245 (usually "connection refused: <reason>") and writing another one is
5246 unnecessary clutter. */
5248 if (smtp_start_session())
5251 for (; (reset_point = store_mark()); store_reset(reset_point))
5253 if (smtp_setup_msg() <= 0) break;
5254 if (!receive_msg(FALSE)) break;
5256 return_path = sender_address = NULL;
5257 dnslist_domain = dnslist_matched = NULL;
5258 #ifndef DISABLE_DKIM
5259 dkim_cur_signer = NULL;
5262 deliver_localpart_orig = NULL;
5263 deliver_domain_orig = NULL;
5264 callout_address = sending_ip_address = NULL;
5265 deliver_localpart_data = deliver_domain_data =
5266 recipient_data = sender_data = NULL;
5267 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5271 exim_exit(EXIT_SUCCESS);
5275 /* Arrange for message reception if recipients or SMTP were specified;
5276 otherwise complain unless a version print (-bV) happened or this is a filter
5277 verification test or info dump.
5278 In the former case, show the configuration file name. */
5280 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5282 if (version_printed)
5284 if (Ustrchr(config_main_filelist, ':'))
5285 printf("Configuration file search path is %s\n", config_main_filelist);
5286 printf("Configuration file is %s\n", config_main_filename);
5287 return EXIT_SUCCESS;
5290 if (info_flag != CMDINFO_NONE)
5292 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5293 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5296 if (filter_test == FTEST_NONE)
5297 exim_usage(called_as);
5301 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5302 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5303 that we are not called from inetd, because that is rejected above. The
5304 following configuration settings are forced here:
5306 (1) Synchronous delivery (-odi)
5307 (2) Errors to stderr (-oep == -oeq)
5308 (3) No parallel remote delivery
5309 (4) Unprivileged delivery
5311 We don't force overall queueing options because there are several of them;
5312 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5313 to override any SMTP queueing. */
5317 f.synchronous_delivery = TRUE;
5318 arg_error_handling = ERRORS_STDERR;
5319 remote_max_parallel = 1;
5320 deliver_drop_privilege = TRUE;
5321 f.queue_smtp = FALSE;
5322 queue_smtp_domains = NULL;
5324 message_utf8_downconvert = -1; /* convert-if-needed */
5329 /* Prepare to accept one or more new messages on the standard input. When a
5330 message has been read, its id is returned in message_id[]. If doing immediate
5331 delivery, we fork a delivery process for each received message, except for the
5332 last one, where we can save a process switch.
5334 It is only in non-smtp mode that error_handling is allowed to be changed from
5335 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5336 sendmail error modes other than -oem ever actually used? Later: yes.) */
5338 if (!smtp_input) error_handling = arg_error_handling;
5340 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5341 logging being sent down the socket and make an identd call to get the
5344 else if (f.is_inetd)
5346 (void)fclose(stderr);
5347 exim_nullstd(); /* Re-open to /dev/null */
5348 verify_get_ident(IDENT_PORT);
5349 host_build_sender_fullhost();
5350 set_process_info("handling incoming connection from %s via inetd",
5354 /* If the sender host address has been set, build sender_fullhost if it hasn't
5355 already been done (which it will have been for inetd). This caters for the
5356 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5357 so that the test for IP options is skipped for -bs input. */
5359 if (sender_host_address && !sender_fullhost)
5361 host_build_sender_fullhost();
5362 set_process_info("handling incoming connection from %s via -oMa",
5364 f.sender_host_notsocket = TRUE;
5367 /* Otherwise, set the sender host as unknown except for inetd calls. This
5368 prevents host checking in the case of -bs not from inetd and also for -bS. */
5370 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5372 /* If stdout does not exist, then dup stdin to stdout. This can happen
5373 if exim is started from inetd. In this case fd 0 will be set to the socket,
5374 but fd 1 will not be set. This also happens for passed SMTP channels. */
5376 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5378 /* Set up the incoming protocol name and the state of the program. Root is
5379 allowed to force received protocol via the -oMr option above. If we have come
5380 via inetd, the process info has already been set up. We don't set
5381 received_protocol here for smtp input, as it varies according to
5382 batch/HELO/EHLO/AUTH/TLS. */
5386 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5387 smtp_batched_input? "batched " : "",
5388 (sender_address!= NULL)? sender_address : originator_login);
5392 int old_pool = store_pool;
5393 store_pool = POOL_PERM;
5394 if (!received_protocol)
5395 received_protocol = string_sprintf("local%s", called_as);
5396 store_pool = old_pool;
5397 set_process_info("accepting a local non-SMTP message from <%s>",
5401 /* Initialize the session_local_queue-only flag (this will be ignored if
5402 mua_wrapper is set) */
5405 session_local_queue_only = queue_only;
5407 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5408 the spool if so configured. On failure, we must not attempt to send an error
5409 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5410 error code is given.) */
5412 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5413 exim_fail("exim: insufficient disk space\n");
5415 /* If this is smtp input of any kind, real or batched, handle the start of the
5418 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5419 because a log line has already been written for all its failure exists
5420 (usually "connection refused: <reason>") and writing another one is
5421 unnecessary clutter. */
5427 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5428 if (verify_check_host(&hosts_connection_nolog) == OK)
5429 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5430 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5431 if (!smtp_start_session())
5434 exim_exit(EXIT_SUCCESS);
5438 /* Otherwise, set up the input size limit here. */
5442 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5443 if (expand_string_message)
5444 if (thismessage_size_limit == -1)
5445 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5446 "message_size_limit: %s", expand_string_message);
5448 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5449 "message_size_limit: %s", expand_string_message);
5452 /* Loop for several messages when reading SMTP input. If we fork any child
5453 processes, we don't want to wait for them unless synchronous delivery is
5454 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5455 same as SIG_DFL, despite the fact that documentation often lists the default as
5456 "ignore". This is a confusing area. This is what I know:
5458 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5459 processes that complete simply to go away without ever becoming defunct. You
5460 can't then wait for them - but we don't want to wait for them in the
5461 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5462 happen for all OS (e.g. *BSD is different).
5464 But that's not the end of the story. Some (many? all?) systems have the
5465 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5466 has by default, so it seems that the difference is merely one of default
5467 (compare restarting vs non-restarting signals).
5469 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5470 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5471 of the loop below. Paranoia rules.
5473 February 2003: That's *still* not the end of the story. There are now versions
5474 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5475 process then calls waitpid(), a grumble is written to the system log, because
5476 this is logically inconsistent. In other words, it doesn't like the paranoia.
5477 As a consequence of this, the waitpid() below is now excluded if we are sure
5478 that SIG_IGN works. */
5480 if (!f.synchronous_delivery)
5483 struct sigaction act;
5484 act.sa_handler = SIG_IGN;
5485 sigemptyset(&(act.sa_mask));
5486 act.sa_flags = SA_NOCLDWAIT;
5487 sigaction(SIGCHLD, &act, NULL);
5489 signal(SIGCHLD, SIG_IGN);
5493 /* Save the current store pool point, for resetting at the start of
5494 each message, and save the real sender address, if any. */
5496 real_sender_address = sender_address;
5498 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5499 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5502 for (BOOL more = TRUE; more; )
5504 rmark reset_point = store_mark();
5507 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5508 input and build the recipients list, before calling receive_msg() to read the
5509 message proper. Whatever sender address is given in the SMTP transaction is
5510 often ignored for local senders - we use the actual sender, which is normally
5511 either the underlying user running this process or a -f argument provided by
5512 a trusted caller. It is saved in real_sender_address. The test for whether to
5513 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5518 if ((rc = smtp_setup_msg()) > 0)
5520 if (real_sender_address != NULL &&
5521 !receive_check_set_sender(sender_address))
5523 sender_address = raw_sender = real_sender_address;
5524 sender_address_unrewritten = NULL;
5527 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5528 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5529 the very end. The result of the ACL is ignored (as for other non-SMTP
5530 messages). It is run for its potential side effects. */
5532 if (smtp_batched_input && acl_not_smtp_start != NULL)
5534 uschar *user_msg, *log_msg;
5535 f.enable_dollar_recipients = TRUE;
5536 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5537 &user_msg, &log_msg);
5538 f.enable_dollar_recipients = FALSE;
5541 /* Now get the data for the message */
5543 more = receive_msg(extract_recipients);
5546 cancel_cutthrough_connection(TRUE, US"receive dropped");
5547 if (more) goto MORELOOP;
5548 smtp_log_no_mail(); /* Log no mail if configured */
5549 exim_exit(EXIT_FAILURE);
5554 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5555 smtp_log_no_mail(); /* Log no mail if configured */
5556 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5560 /* In the non-SMTP case, we have all the information from the command
5561 line, but must process it in case it is in the more general RFC822
5562 format, and in any case, to detect syntax errors. Also, it appears that
5563 the use of comma-separated lists as single arguments is common, so we
5564 had better support them. */
5569 int count = argc - recipients_arg;
5570 uschar **list = argv + recipients_arg;
5572 /* These options cannot be changed dynamically for non-SMTP messages */
5574 f.active_local_sender_retain = local_sender_retain;
5575 f.active_local_from_check = local_from_check;
5577 /* Save before any rewriting */
5579 raw_sender = string_copy(sender_address);
5581 /* Loop for each argument (supplied by user hence tainted) */
5583 for (int i = 0; i < count; i++)
5585 int start, end, domain;
5587 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5588 * We'll still want to cap it to something, just in case. */
5589 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5591 /* Loop for each comma-separated address */
5595 BOOL finished = FALSE;
5597 uschar *ss = parse_find_address_end(s, FALSE);
5599 if (*ss == ',') *ss = 0; else finished = TRUE;
5601 /* Check max recipients - if -t was used, these aren't recipients */
5603 if (recipients_max > 0 && ++rcount > recipients_max &&
5604 !extract_recipients)
5605 if (error_handling == ERRORS_STDERR)
5607 fprintf(stderr, "exim: too many recipients\n");
5608 exim_exit(EXIT_FAILURE);
5612 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5613 errors_sender_rc : EXIT_FAILURE;
5617 BOOL b = allow_utf8_domains;
5618 allow_utf8_domains = TRUE;
5621 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5625 if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
5626 else allow_utf8_domains = b;
5631 if (domain == 0 && !f.allow_unqualified_recipient)
5634 errmess = US"unqualified recipient address not allowed";
5638 if (error_handling == ERRORS_STDERR)
5640 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5641 string_printing(list[i]), errmess);
5642 exim_exit(EXIT_FAILURE);
5648 eblock.text1 = string_printing(list[i]);
5649 eblock.text2 = errmess;
5651 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5652 errors_sender_rc : EXIT_FAILURE;
5655 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5658 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5662 /* Show the recipients when debugging */
5666 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5667 if (recipients_list)
5669 debug_printf("Recipients:\n");
5670 for (int i = 0; i < recipients_count; i++)
5671 debug_printf(" %s\n", recipients_list[i].address);
5675 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5676 ignored; rejecting here would just add complication, and it can just as
5677 well be done later. Allow $recipients to be visible in the ACL. */
5679 if (acl_not_smtp_start)
5681 uschar *user_msg, *log_msg;
5682 f.enable_dollar_recipients = TRUE;
5683 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5684 &user_msg, &log_msg);
5685 f.enable_dollar_recipients = FALSE;
5688 /* Pause for a while waiting for input. If none received in that time,
5689 close the logfile, if we had one open; then if we wait for a long-running
5690 datasource (months, in one use-case) log rotation will not leave us holding
5693 if (!receive_timeout)
5695 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5698 FD_ZERO(&r); FD_SET(0, &r);
5699 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5702 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5703 will just read the headers for the message, and not write anything onto the
5706 message_ended = END_NOTENDED;
5707 more = receive_msg(extract_recipients);
5709 /* more is always FALSE here (not SMTP message) when reading a message
5710 for real; when reading the headers of a message for filter testing,
5711 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5713 if (!message_id[0]) exim_exit(EXIT_FAILURE);
5714 } /* Non-SMTP message reception */
5716 /* If this is a filter testing run, there are headers in store, but
5717 no message on the spool. Run the filtering code in testing mode, setting
5718 the domain to the qualify domain and the local part to the current user,
5719 unless they have been set by options. The prefix and suffix are left unset
5720 unless specified. The the return path is set to to the sender unless it has
5721 already been set from a return-path header in the message. */
5723 if (filter_test != FTEST_NONE)
5725 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5726 deliver_domain_orig = deliver_domain;
5727 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5728 deliver_localpart_orig = deliver_localpart;
5729 deliver_localpart_prefix = US ftest_prefix;
5730 deliver_localpart_suffix = US ftest_suffix;
5731 deliver_home = originator_home;
5735 printf("Return-path copied from sender\n");
5736 return_path = string_copy(sender_address);
5739 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5740 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5742 receive_add_recipient(
5743 string_sprintf("%s%s%s@%s",
5744 ftest_prefix ? ftest_prefix : US"",
5746 ftest_suffix ? ftest_suffix : US"",
5747 deliver_domain), -1);
5749 printf("Recipient = %s\n", recipients_list[0].address);
5750 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5751 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5753 if (chdir("/")) /* Get away from wherever the user is running this from */
5755 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5756 exim_exit(EXIT_FAILURE);
5759 /* Now we run either a system filter test, or a user filter test, or both.
5760 In the latter case, headers added by the system filter will persist and be
5761 available to the user filter. We need to copy the filter variables
5764 if (filter_test & FTEST_SYSTEM)
5765 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5766 exim_exit(EXIT_FAILURE);
5768 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5770 if (filter_test & FTEST_USER)
5771 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5772 exim_exit(EXIT_FAILURE);
5774 exim_exit(EXIT_SUCCESS);
5777 /* Else act on the result of message reception. We should not get here unless
5778 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5779 will be TRUE. If it is not, check on the number of messages received in this
5782 if ( !session_local_queue_only
5783 && smtp_accept_queue_per_connection > 0
5784 && receive_messagecount > smtp_accept_queue_per_connection)
5786 session_local_queue_only = TRUE;
5787 queue_only_reason = 2;
5790 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5791 and queue_only_load is set, check that the load average is below it. If it is
5792 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5793 default), we put the whole session into queue_only mode. It then remains this
5794 way for any subsequent messages on the same SMTP connection. This is a
5795 deliberate choice; even though the load average may fall, it doesn't seem
5796 right to deliver later messages on the same call when not delivering earlier
5797 ones. However, there are odd cases where this is not wanted, so this can be
5798 changed by setting queue_only_load_latch false. */
5800 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5801 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5803 queue_only_reason = 3;
5804 if (queue_only_load_latch) session_local_queue_only = TRUE;
5807 /* If running as an MUA wrapper, all queueing options and freezing options
5811 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5813 /* Log the queueing here, when it will get a message id attached, but
5814 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5817 if (local_queue_only)
5819 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5820 switch(queue_only_reason)
5823 log_write(L_delay_delivery,
5824 LOG_MAIN, "no immediate delivery: more than %d messages "
5825 "received in one connection", smtp_accept_queue_per_connection);
5829 log_write(L_delay_delivery,
5830 LOG_MAIN, "no immediate delivery: load average %.2f",
5831 (double)load_average/1000.0);
5836 else if (f.queue_only_policy || f.deliver_freeze)
5837 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5839 /* Else do the delivery unless the ACL or local_scan() called for queue only
5840 or froze the message. Always deliver in a separate process. A fork failure is
5841 not a disaster, as the delivery will eventually happen on a subsequent queue
5842 run. The search cache must be tidied before the fork, as the parent will
5843 do it before exiting. The child will trigger a lookup failure and
5844 thereby defer the delivery if it tries to use (for example) a cached ldap
5845 connection that the parent has called unbind on. */
5852 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5855 close_unwanted(); /* Close unwanted file descriptors and TLS */
5856 exim_nullstd(); /* Ensure std{in,out,err} exist */
5858 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5859 mode, deliver_drop_privilege is forced TRUE). */
5861 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5863 delivery_re_exec(CEE_EXEC_EXIT);
5864 /* Control does not return here. */
5867 /* No need to re-exec */
5869 rc = deliver_message(message_id, FALSE, FALSE);
5871 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5872 ? EXIT_SUCCESS : EXIT_FAILURE);
5877 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5878 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5879 "process: %s", strerror(errno));
5883 release_cutthrough_connection(US"msg passed for delivery");
5885 /* In the parent, wait if synchronous delivery is required. This will
5886 always be the case in MUA wrapper mode. */
5888 if (f.synchronous_delivery)
5891 while (wait(&status) != pid);
5892 if ((status & 0x00ff) != 0)
5893 log_write(0, LOG_MAIN|LOG_PANIC,
5894 "process %d crashed with signal %d while delivering %s",
5895 (int)pid, status & 0x00ff, message_id);
5896 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5901 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5902 automatically reaps children (see comments above the loop), clear away any
5903 finished subprocesses here, in case there are lots of messages coming in
5904 from the same source. */
5906 #ifndef SIG_IGN_WORKS
5907 while (waitpid(-1, NULL, WNOHANG) > 0);
5911 return_path = sender_address = NULL;
5912 authenticated_sender = NULL;
5913 deliver_localpart_orig = NULL;
5914 deliver_domain_orig = NULL;
5915 deliver_host = deliver_host_address = NULL;
5916 dnslist_domain = dnslist_matched = NULL;
5917 #ifdef WITH_CONTENT_SCAN
5918 malware_name = NULL;
5920 callout_address = NULL;
5921 sending_ip_address = NULL;
5922 deliver_localpart_data = deliver_domain_data =
5923 recipient_data = sender_data = NULL;
5925 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5927 store_reset(reset_point);
5930 exim_exit(EXIT_SUCCESS); /* Never returns */
5931 return 0; /* To stop compiler warning */