1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 */
7 /* See the file NOTICE for conditions of use and distribution. */
10 /* The main function: entry point, initialization, and high-level control.
11 Also a few functions that don't naturally fit elsewhere. */
16 #if defined(__GLIBC__) && !defined(__UCLIBC__)
17 # include <gnu/libc-version.h>
21 # include <gnutls/gnutls.h>
22 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
31 extern void init_lookup_list(void);
35 /*************************************************
36 * Function interface to store functions *
37 *************************************************/
39 /* We need some real functions to pass to the PCRE regular expression library
40 for store allocation via Exim's store manager. The normal calls are actually
41 macros that pass over location information to make tracing easier. These
42 functions just interface to the standard macro calls. A good compiler will
43 optimize out the tail recursion and so not make them too expensive. There
44 are two sets of functions; one for use when we want to retain the compiled
45 regular expression for a long time; the other for short-term use. */
48 function_store_get(size_t size)
50 /* For now, regard all RE results as potentially tainted. We might need
51 more intelligence on this point. */
52 return store_get((int)size, TRUE);
56 function_dummy_free(void * block) {}
59 function_store_malloc(size_t size)
61 return store_malloc((int)size);
65 function_store_free(void * block)
73 /*************************************************
74 * Enums for cmdline interface *
75 *************************************************/
77 enum commandline_info { CMDINFO_NONE=0,
78 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
83 /*************************************************
84 * Compile regular expression and panic on fail *
85 *************************************************/
87 /* This function is called when failure to compile a regular expression leads
88 to a panic exit. In other cases, pcre_compile() is called directly. In many
89 cases where this function is used, the results of the compilation are to be
90 placed in long-lived store, so we temporarily reset the store management
91 functions that PCRE uses if the use_malloc flag is set.
94 pattern the pattern to compile
95 caseless TRUE if caseless matching is required
96 use_malloc TRUE if compile into malloc store
98 Returns: pointer to the compiled pattern
102 regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
105 int options = PCRE_COPT;
110 pcre_malloc = function_store_malloc;
111 pcre_free = function_store_free;
113 if (caseless) options |= PCRE_CASELESS;
114 yield = pcre_compile(CCS pattern, options, CCSS &error, &offset, NULL);
115 pcre_malloc = function_store_get;
116 pcre_free = function_dummy_free;
118 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
119 "%s at offset %d while compiling %s", error, offset, pattern);
126 /*************************************************
127 * Execute regular expression and set strings *
128 *************************************************/
130 /* This function runs a regular expression match, and sets up the pointers to
131 the matched substrings.
134 re the compiled expression
135 subject the subject string
136 options additional PCRE options
137 setup if < 0 do full setup
138 if >= 0 setup from setup+1 onwards,
139 excluding the full matched string
141 Returns: TRUE or FALSE
145 regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
147 int ovector[3*(EXPAND_MAXN+1)];
148 uschar * s = string_copy(subject); /* de-constifying */
149 int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
150 PCRE_EOPT | options, ovector, nelem(ovector));
152 if (n == 0) n = EXPAND_MAXN + 1;
155 expand_nmax = setup < 0 ? 0 : setup + 1;
156 for (int nn = setup < 0 ? 0 : 2; nn < n*2; nn += 2)
158 expand_nstring[expand_nmax] = s + ovector[nn];
159 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
169 /*************************************************
170 * Set up processing details *
171 *************************************************/
173 /* Save a text string for dumping when SIGUSR1 is received.
174 Do checks for overruns.
176 Arguments: format and arguments, as for printf()
181 set_process_info(const char *format, ...)
183 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
188 g = string_fmt_append(&gs, "%5d ", (int)getpid());
190 va_start(ap, format);
191 if (!string_vformat(g, 0, format, ap))
194 g = string_cat(&gs, US"**** string overflowed buffer ****");
196 g = string_catn(g, US"\n", 1);
197 string_from_gstring(g);
198 process_info_len = g->ptr;
199 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
203 /***********************************************
204 * Handler for SIGTERM *
205 ***********************************************/
208 term_handler(int sig)
214 /*************************************************
215 * Handler for SIGUSR1 *
216 *************************************************/
218 /* SIGUSR1 causes any exim process to write to the process log details of
219 what it is currently doing. It will only be used if the OS is capable of
220 setting up a handler that causes automatic restarting of any system call
221 that is in progress at the time.
223 This function takes care to be signal-safe.
225 Argument: the signal number (SIGUSR1)
230 usr1_handler(int sig)
234 os_restarting_signal(sig, usr1_handler);
236 if ((fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE)) < 0)
238 /* If we are already running as the Exim user, try to create it in the
239 current process (assuming spool_directory exists). Otherwise, if we are
240 root, do the creation in an exim:exim subprocess. */
242 int euid = geteuid();
243 if (euid == exim_uid)
244 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
245 else if (euid == root_uid)
246 fd = log_create_as_exim(process_log_path);
249 /* If we are neither exim nor root, or if we failed to create the log file,
250 give up. There is not much useful we can do with errors, since we don't want
251 to disrupt whatever is going on outside the signal handler. */
255 (void)write(fd, process_info, process_info_len);
261 /*************************************************
263 *************************************************/
265 /* This handler is enabled most of the time that Exim is running. The handler
266 doesn't actually get used unless alarm() has been called to set a timer, to
267 place a time limit on a system call of some kind. When the handler is run, it
270 There are some other SIGALRM handlers that are used in special cases when more
271 than just a flag setting is required; for example, when reading a message's
272 input. These are normally set up in the code module that uses them, and the
273 SIGALRM handler is reset to this one afterwards.
275 Argument: the signal value (SIGALRM)
280 sigalrm_handler(int sig)
283 os_non_restarting_signal(SIGALRM, sigalrm_handler);
288 /*************************************************
289 * Sleep for a fractional time interval *
290 *************************************************/
292 /* This function is called by millisleep() and exim_wait_tick() to wait for a
293 period of time that may include a fraction of a second. The coding is somewhat
294 tedious. We do not expect setitimer() ever to fail, but if it does, the process
295 will wait for ever, so we panic in this instance. (There was a case of this
296 when a bug in a function that calls milliwait() caused it to pass invalid data.
297 That's when I added the check. :-)
299 We assume it to be not worth sleeping for under 50us; this value will
300 require revisiting as hardware advances. This avoids the issue of
301 a zero-valued timer setting meaning "never fire".
303 Argument: an itimerval structure containing the interval
308 milliwait(struct itimerval *itval)
311 sigset_t old_sigmask;
312 int save_errno = errno;
314 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
316 (void)sigemptyset(&sigmask); /* Empty mask */
317 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
318 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
319 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
320 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
321 "setitimer() failed: %s", strerror(errno));
322 (void)sigfillset(&sigmask); /* All signals */
323 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
324 (void)sigsuspend(&sigmask); /* Until SIGALRM */
325 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
327 sigalrm_seen = FALSE;
333 /*************************************************
334 * Millisecond sleep function *
335 *************************************************/
337 /* The basic sleep() function has a granularity of 1 second, which is too rough
338 in some cases - for example, when using an increasing delay to slow down
341 Argument: number of millseconds
348 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
349 .it_value = {.tv_sec = msec/1000,
350 .tv_usec = (msec % 1000) * 1000}};
356 /*************************************************
357 * Compare microsecond times *
358 *************************************************/
365 Returns: -1, 0, or +1
369 exim_tvcmp(struct timeval *t1, struct timeval *t2)
371 if (t1->tv_sec > t2->tv_sec) return +1;
372 if (t1->tv_sec < t2->tv_sec) return -1;
373 if (t1->tv_usec > t2->tv_usec) return +1;
374 if (t1->tv_usec < t2->tv_usec) return -1;
381 /*************************************************
382 * Clock tick wait function *
383 *************************************************/
385 #ifdef _POSIX_MONOTONIC_CLOCK
386 # ifdef CLOCK_BOOTTIME
387 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
389 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
392 /* Amount EXIM_CLOCK is behind realtime, at startup. */
393 static struct timespec offset_ts;
396 exim_clock_init(void)
399 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
400 (void)gettimeofday(&tv, NULL);
401 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
402 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
403 if (offset_ts.tv_nsec >= 0) return;
405 offset_ts.tv_nsec += 1000*1000*1000;
411 exim_gettime(struct timeval * tv)
413 #ifdef _POSIX_MONOTONIC_CLOCK
414 struct timespec now_ts;
416 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
418 now_ts.tv_sec += offset_ts.tv_sec;
419 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
422 now_ts.tv_nsec -= 1000*1000*1000;
424 tv->tv_sec = now_ts.tv_sec;
425 tv->tv_usec = now_ts.tv_nsec / 1000;
429 (void)gettimeofday(tv, NULL);
433 /* Exim uses a time + a pid to generate a unique identifier in two places: its
434 message IDs, and in file names for maildir deliveries. Because some OS now
435 re-use pids within the same second, sub-second times are now being used.
436 However, for absolute certainty, we must ensure the clock has ticked before
437 allowing the relevant process to complete. At the time of implementation of
438 this code (February 2003), the speed of processors is such that the clock will
439 invariably have ticked already by the time a process has done its job. This
440 function prepares for the time when things are faster - and it also copes with
441 clocks that go backwards.
444 tgt_tv A timeval which was used to create uniqueness; its usec field
445 has been rounded down to the value of the resolution.
446 We want to be sure the current time is greater than this.
447 resolution The resolution that was used to divide the microseconds
448 (1 for maildir, larger for message ids)
454 exim_wait_tick(struct timeval * tgt_tv, int resolution)
456 struct timeval now_tv;
457 long int now_true_usec;
459 exim_gettime(&now_tv);
460 now_true_usec = now_tv.tv_usec;
461 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
463 while (exim_tvcmp(&now_tv, tgt_tv) <= 0)
465 struct itimerval itval;
466 itval.it_interval.tv_sec = 0;
467 itval.it_interval.tv_usec = 0;
468 itval.it_value.tv_sec = tgt_tv->tv_sec - now_tv.tv_sec;
469 itval.it_value.tv_usec = tgt_tv->tv_usec + resolution - now_true_usec;
471 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
472 negative value for the microseconds is possible only in the case when "now"
473 is more than a second less than "tgt". That means that itval.it_value.tv_sec
474 is greater than zero. The following correction is therefore safe. */
476 if (itval.it_value.tv_usec < 0)
478 itval.it_value.tv_usec += 1000000;
479 itval.it_value.tv_sec -= 1;
482 DEBUG(D_transport|D_receive)
484 if (!f.running_in_test_harness)
486 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
487 tgt_tv->tv_sec, (long) tgt_tv->tv_usec,
488 now_tv.tv_sec, (long) now_tv.tv_usec);
489 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
490 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
496 /* Be prapared to go around if the kernel does not implement subtick
497 granularity (GNU Hurd) */
499 exim_gettime(&now_tv);
500 now_true_usec = now_tv.tv_usec;
501 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
508 /*************************************************
509 * Call fopen() with umask 777 and adjust mode *
510 *************************************************/
512 /* Exim runs with umask(0) so that files created with open() have the mode that
513 is specified in the open() call. However, there are some files, typically in
514 the spool directory, that are created with fopen(). They end up world-writeable
515 if no precautions are taken. Although the spool directory is not accessible to
516 the world, this is an untidiness. So this is a wrapper function for fopen()
517 that sorts out the mode of the created file.
520 filename the file name
521 options the fopen() options
522 mode the required mode
524 Returns: the fopened FILE or NULL
528 modefopen(const uschar *filename, const char *options, mode_t mode)
530 mode_t saved_umask = umask(0777);
531 FILE *f = Ufopen(filename, options);
532 (void)umask(saved_umask);
533 if (f != NULL) (void)fchmod(fileno(f), mode);
538 /*************************************************
539 * Ensure stdin, stdout, and stderr exist *
540 *************************************************/
542 /* Some operating systems grumble if an exec() happens without a standard
543 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
544 file will be opened and will use these fd values, and then some other bit of
545 code will assume, for example, that it can write error messages to stderr.
546 This function ensures that fds 0, 1, and 2 are open if they do not already
547 exist, by connecting them to /dev/null.
549 This function is also used to ensure that std{in,out,err} exist at all times,
550 so that if any library that Exim calls tries to use them, it doesn't crash.
561 for (int i = 0; i <= 2; i++)
563 if (fstat(i, &statbuf) < 0 && errno == EBADF)
565 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
566 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
567 string_open_failed("/dev/null", NULL));
568 if (devnull != i) (void)dup2(devnull, i);
571 if (devnull > 2) (void)close(devnull);
577 /*************************************************
578 * Close unwanted file descriptors for delivery *
579 *************************************************/
581 /* This function is called from a new process that has been forked to deliver
582 an incoming message, either directly, or using exec.
584 We want any smtp input streams to be closed in this new process. However, it
585 has been observed that using fclose() here causes trouble. When reading in -bS
586 input, duplicate copies of messages have been seen. The files will be sharing a
587 file pointer with the parent process, and it seems that fclose() (at least on
588 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
589 least sometimes. Hence we go for closing the underlying file descriptors.
591 If TLS is active, we want to shut down the TLS library, but without molesting
592 the parent's SSL connection.
594 For delivery of a non-SMTP message, we want to close stdin and stdout (and
595 stderr unless debugging) because the calling process might have set them up as
596 pipes and be waiting for them to close before it waits for the submission
597 process to terminate. If they aren't closed, they hold up the calling process
598 until the initial delivery process finishes, which is not what we want.
600 Exception: We do want it for synchronous delivery!
602 And notwithstanding all the above, if D_resolver is set, implying resolver
603 debugging, leave stdout open, because that's where the resolver writes its
606 When we close stderr (which implies we've also closed stdout), we also get rid
607 of any controlling terminal.
619 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
621 (void)close(fileno(smtp_in));
622 (void)close(fileno(smtp_out));
627 (void)close(0); /* stdin */
628 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
629 if (debug_selector == 0) /* stderr */
631 if (!f.synchronous_delivery)
644 /*************************************************
646 *************************************************/
648 /* This function sets a new uid and gid permanently, optionally calling
649 initgroups() to set auxiliary groups. There are some special cases when running
650 Exim in unprivileged modes. In these situations the effective uid will not be
651 root; if we already have the right effective uid/gid, and don't need to
652 initialize any groups, leave things as they are.
657 igflag TRUE if initgroups() wanted
658 msg text to use in debugging output and failure log
660 Returns: nothing; bombs out on failure
664 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
666 uid_t euid = geteuid();
667 gid_t egid = getegid();
669 if (euid == root_uid || euid != uid || egid != gid || igflag)
671 /* At least one OS returns +1 for initgroups failure, so just check for
676 struct passwd *pw = getpwuid(uid);
678 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
679 "no passwd entry for uid=%ld", (long int)uid);
681 if (initgroups(pw->pw_name, gid) != 0)
682 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
683 (long int)uid, strerror(errno));
686 if (setgid(gid) < 0 || setuid(uid) < 0)
687 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
688 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
691 /* Debugging output included uid/gid and all groups */
695 int group_count, save_errno;
696 gid_t group_list[EXIM_GROUPLIST_SIZE];
697 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
698 (long int)geteuid(), (long int)getegid(), (long int)getpid());
699 group_count = getgroups(nelem(group_list), group_list);
701 debug_printf(" auxiliary group list:");
703 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
704 else if (group_count < 0)
705 debug_printf(" <error: %s>", strerror(save_errno));
706 else debug_printf(" <none>");
714 /*************************************************
716 *************************************************/
718 /* Exim exits via this function so that it always clears up any open
724 Returns: does not return
733 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
734 ">>>>>>>>>>>>>>>>\n",
735 (int)getpid(), process_purpose, rc);
741 exim_underbar_exit(int rc)
745 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
746 ">>>>>>>>>>>>>>>>\n",
747 (int)getpid(), process_purpose, rc);
753 /* Print error string, then die */
755 exim_fail(const char * fmt, ...)
759 vfprintf(stderr, fmt, ap);
763 /* fail if a length is too long */
765 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
767 if (itemlen <= maxlen)
769 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
770 itemlen, maxlen, description);
774 /* only pass through the string item back to the caller if it's short enough */
775 static inline const uschar *
776 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
778 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
782 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
783 of chown()/fchown(). See src/functions.h for more explanation */
785 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
787 int saved_errno = errno; /* from the preceeding chown call */
789 log_write(0, LOG_MAIN|LOG_PANIC,
790 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
791 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
792 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
794 /* I leave this here, commented, in case the "bug"(?) comes up again.
795 It is not an Exim bug, but we can provide a workaround.
801 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
803 if (buf.st_uid == owner && buf.st_gid == group) return 0;
804 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
806 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
814 /*************************************************
815 * Extract port from host address *
816 *************************************************/
818 /* Called to extract the port from the values given to -oMa and -oMi.
819 It also checks the syntax of the address, and terminates it before the
820 port data when a port is extracted.
823 address the address, with possible port on the end
825 Returns: the port, or zero if there isn't one
826 bombs out on a syntax error
830 check_port(uschar *address)
832 int port = host_address_extract_port(address);
833 if (string_is_ip_address(address, NULL) == 0)
834 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
840 /*************************************************
841 * Test/verify an address *
842 *************************************************/
844 /* This function is called by the -bv and -bt code. It extracts a working
845 address from a full RFC 822 address. This isn't really necessary per se, but it
846 has the effect of collapsing source routes.
850 flags flag bits for verify_address()
851 exit_value to be set for failures
857 test_address(uschar *s, int flags, int *exit_value)
859 int start, end, domain;
860 uschar *parse_error = NULL;
861 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
865 fprintf(stdout, "syntax error: %s\n", parse_error);
870 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
871 -1, -1, NULL, NULL, NULL);
872 if (rc == FAIL) *exit_value = 2;
873 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
879 /*************************************************
880 * Show supported features *
881 *************************************************/
884 show_db_version(FILE * f)
886 #ifdef DB_VERSION_STRING
889 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
890 fprintf(f, " Runtime: %s\n",
891 db_version(NULL, NULL, NULL));
894 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
896 #elif defined(BTREEVERSION) && defined(HASHVERSION)
898 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
900 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
903 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
904 fprintf(f, "Probably ndbm\n");
905 #elif defined(USE_TDB)
906 fprintf(f, "Using tdb\n");
909 fprintf(f, "Probably GDBM (native mode)\n");
911 fprintf(f, "Probably GDBM (compatibility mode)\n");
917 /* This function is called for -bV/--version and for -d to output the optional
918 features of the current Exim binary.
920 Arguments: a FILE for printing
925 show_whats_supported(FILE * fp)
927 rmark reset_point = store_mark();
929 DEBUG(D_any) {} else show_db_version(fp);
931 g = string_cat(NULL, US"Support for:");
932 #ifdef SUPPORT_CRYPTEQ
933 g = string_cat(g, US" crypteq");
936 g = string_cat(g, US" iconv()");
939 g = string_cat(g, US" IPv6");
941 #ifdef HAVE_SETCLASSRESOURCES
942 g = string_cat(g, US" use_setclassresources");
945 g = string_cat(g, US" PAM");
948 g = string_cat(g, US" Perl");
951 g = string_cat(g, US" Expand_dlfunc");
953 #ifdef USE_TCP_WRAPPERS
954 g = string_cat(g, US" TCPwrappers");
957 g = string_cat(g, US" GnuTLS");
960 g = string_cat(g, US" OpenSSL");
962 #ifndef DISABLE_TLS_RESUME
963 g = string_cat(g, US" TLS_resume");
965 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
966 g = string_cat(g, US" translate_ip_address");
968 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
969 g = string_cat(g, US" move_frozen_messages");
971 #ifdef WITH_CONTENT_SCAN
972 g = string_cat(g, US" Content_Scanning");
975 g = string_cat(g, US" DANE");
978 g = string_cat(g, US" DKIM");
981 g = string_cat(g, US" DMARC");
983 #ifndef DISABLE_DNSSEC
984 g = string_cat(g, US" DNSSEC");
986 #ifndef DISABLE_EVENT
987 g = string_cat(g, US" Event");
990 g = string_cat(g, US" I18N");
993 g = string_cat(g, US" OCSP");
995 #ifndef DISABLE_PIPE_CONNECT
996 g = string_cat(g, US" PIPE_CONNECT");
999 g = string_cat(g, US" PRDR");
1001 #ifdef SUPPORT_PROXY
1002 g = string_cat(g, US" PROXY");
1004 #ifndef DISABLE_QUEUE_RAMP
1005 g = string_cat(g, US" Experimental_Queue_Ramp");
1007 #ifdef SUPPORT_SOCKS
1008 g = string_cat(g, US" SOCKS");
1011 g = string_cat(g, US" SPF");
1013 #if defined(SUPPORT_SRS)
1014 g = string_cat(g, US" SRS");
1018 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1020 #ifdef EXPERIMENTAL_ARC
1021 g = string_cat(g, US" Experimental_ARC");
1023 #ifdef EXPERIMENTAL_BRIGHTMAIL
1024 g = string_cat(g, US" Experimental_Brightmail");
1026 #ifdef EXPERIMENTAL_DCC
1027 g = string_cat(g, US" Experimental_DCC");
1029 #ifdef EXPERIMENTAL_DSN_INFO
1030 g = string_cat(g, US" Experimental_DSN_info");
1032 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1033 g = string_cat(g, US" Experimental_ESMTP_Limits");
1035 #ifdef EXPERIMENTAL_QUEUEFILE
1036 g = string_cat(g, US" Experimental_QUEUEFILE");
1038 #if defined(EXPERIMENTAL_SRS_ALT)
1039 g = string_cat(g, US" Experimental_SRS");
1041 g = string_cat(g, US"\n");
1043 g = string_cat(g, US"Lookups (built-in):");
1044 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1045 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1047 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1048 g = string_cat(g, US" cdb");
1050 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1051 g = string_cat(g, US" dbm dbmjz dbmnz");
1053 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1054 g = string_cat(g, US" dnsdb");
1056 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1057 g = string_cat(g, US" dsearch");
1059 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1060 g = string_cat(g, US" ibase");
1062 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1063 g = string_cat(g, US" json");
1065 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1066 g = string_cat(g, US" ldap ldapdn ldapm");
1069 g = string_cat(g, US" lmdb");
1071 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1072 g = string_cat(g, US" mysql");
1074 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1075 g = string_cat(g, US" nis nis0");
1077 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1078 g = string_cat(g, US" nisplus");
1080 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1081 g = string_cat(g, US" oracle");
1083 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1084 g = string_cat(g, US" passwd");
1086 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1087 g = string_cat(g, US" pgsql");
1089 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1090 g = string_cat(g, US" redis");
1092 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1093 g = string_cat(g, US" sqlite");
1095 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1096 g = string_cat(g, US" testdb");
1098 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1099 g = string_cat(g, US" whoson");
1101 g = string_cat(g, US"\n");
1103 g = auth_show_supported(g);
1104 g = route_show_supported(g);
1105 g = transport_show_supported(g);
1107 #ifdef WITH_CONTENT_SCAN
1108 g = malware_show_supported(g);
1111 if (fixed_never_users[0] > 0)
1114 g = string_cat(g, US"Fixed never_users: ");
1115 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1116 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1117 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1120 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1121 fputs(CS string_from_gstring(g), fp);
1123 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1125 /* Everything else is details which are only worth reporting when debugging.
1126 Perhaps the tls_version_report should move into this too. */
1129 /* clang defines __GNUC__ (at least, for me) so test for it first */
1130 #if defined(__clang__)
1131 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1132 #elif defined(__GNUC__)
1133 fprintf(fp, "Compiler: GCC [%s]\n",
1137 "? unknown version ?"
1141 fprintf(fp, "Compiler: <unknown>\n");
1144 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1145 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1146 __GLIBC__, __GLIBC_MINOR__);
1147 if (__GLIBC_PREREQ(2, 1))
1148 fprintf(fp, " Runtime: %s\n",
1149 gnu_get_libc_version());
1152 show_db_version(fp);
1155 tls_version_report(fp);
1158 utf8_version_report(fp);
1160 #ifdef SUPPORT_DMARC
1161 dmarc_version_report(fp);
1164 spf_lib_version_report(fp);
1167 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1168 if (authi->version_report)
1169 (*authi->version_report)(fp);
1171 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1172 characters; unless it's an ancient version of PCRE in which case it
1174 #ifndef PCRE_PRERELEASE
1175 # define PCRE_PRERELEASE
1178 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1179 fprintf(fp, "Library version: PCRE: Compile: %d.%d%s\n"
1181 PCRE_MAJOR, PCRE_MINOR,
1182 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
1185 #undef EXPAND_AND_QUOTE
1188 for (int i = 0; i < lookup_list_count; i++)
1189 if (lookup_list[i]->version_report)
1190 lookup_list[i]->version_report(fp);
1192 #ifdef WHITELIST_D_MACROS
1193 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1195 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1197 #ifdef TRUSTED_CONFIG_LIST
1198 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1200 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1204 store_reset(reset_point);
1208 /*************************************************
1209 * Show auxiliary information about Exim *
1210 *************************************************/
1213 show_exim_information(enum commandline_info request, FILE *stream)
1218 fprintf(stream, "Oops, something went wrong.\n");
1222 "The -bI: flag takes a string indicating which information to provide.\n"
1223 "If the string is not recognised, you'll get this help (on stderr).\n"
1225 " exim -bI:help this information\n"
1226 " exim -bI:dscp list of known dscp value keywords\n"
1227 " exim -bI:sieve list of supported sieve extensions\n"
1231 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1232 fprintf(stream, "%s\n", *pp);
1235 dscp_list_to_stream(stream);
1241 /*************************************************
1242 * Quote a local part *
1243 *************************************************/
1245 /* This function is used when a sender address or a From: or Sender: header
1246 line is being created from the caller's login, or from an authenticated_id. It
1247 applies appropriate quoting rules for a local part.
1249 Argument: the local part
1250 Returns: the local part, quoted if necessary
1254 local_part_quote(uschar *lpart)
1256 BOOL needs_quote = FALSE;
1259 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1261 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1262 (*t != '.' || t == lpart || t[1] == 0);
1265 if (!needs_quote) return lpart;
1267 g = string_catn(NULL, US"\"", 1);
1271 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1274 g = string_cat(g, lpart);
1277 g = string_catn(g, lpart, nq - lpart);
1278 g = string_catn(g, US"\\", 1);
1279 g = string_catn(g, nq, 1);
1283 g = string_catn(g, US"\"", 1);
1284 return string_from_gstring(g);
1290 /*************************************************
1291 * Load readline() functions *
1292 *************************************************/
1294 /* This function is called from testing executions that read data from stdin,
1295 but only when running as the calling user. Currently, only -be does this. The
1296 function loads the readline() function library and passes back the functions.
1297 On some systems, it needs the curses library, so load that too, but try without
1298 it if loading fails. All this functionality has to be requested at build time.
1301 fn_readline_ptr pointer to where to put the readline pointer
1302 fn_addhist_ptr pointer to where to put the addhistory function
1304 Returns: the dlopen handle or NULL on failure
1308 set_readline(char * (**fn_readline_ptr)(const char *),
1309 void (**fn_addhist_ptr)(const char *))
1312 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1314 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1315 if (dlhandle_curses) dlclose(dlhandle_curses);
1319 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1320 * char * readline (const char *prompt);
1321 * void add_history (const char *string);
1323 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1324 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1327 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1335 /*************************************************
1336 * Get a line from stdin for testing things *
1337 *************************************************/
1339 /* This function is called when running tests that can take a number of lines
1340 of input (for example, -be and -bt). It handles continuations and trailing
1341 spaces. And prompting and a blank line output on eof. If readline() is in use,
1342 the arguments are non-NULL and provide the relevant functions.
1345 fn_readline readline function or NULL
1346 fn_addhist addhist function or NULL
1348 Returns: pointer to dynamic memory, or NULL at end of file
1352 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1356 if (!fn_readline) { printf("> "); fflush(stdout); }
1358 for (int i = 0;; i++)
1360 uschar buffer[1024];
1364 char *readline_line = NULL;
1367 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1368 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1369 p = US readline_line;
1374 /* readline() not in use */
1377 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1381 /* Handle the line */
1383 ss = p + (int)Ustrlen(p);
1384 while (ss > p && isspace(ss[-1])) ss--;
1387 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1389 g = string_catn(g, p, ss - p);
1392 if (fn_readline) free(readline_line);
1395 /* g can only be NULL if ss==p */
1396 if (ss == p || g->s[g->ptr-1] != '\\')
1400 (void) string_from_gstring(g);
1403 if (!g) printf("\n");
1404 return string_from_gstring(g);
1409 /*************************************************
1410 * Output usage information for the program *
1411 *************************************************/
1413 /* This function is called when there are no recipients
1414 or a specific --help argument was added.
1417 progname information on what name we were called by
1419 Returns: DOES NOT RETURN
1423 exim_usage(uschar *progname)
1426 /* Handle specific program invocation variants */
1427 if (Ustrcmp(progname, US"-mailq") == 0)
1429 "mailq - list the contents of the mail queue\n\n"
1430 "For a list of options, see the Exim documentation.\n");
1432 /* Generic usage - we output this whatever happens */
1434 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1435 "not directly from a shell command line. Options and/or arguments control\n"
1436 "what it does when called. For a list of options, see the Exim documentation.\n");
1441 /*************************************************
1442 * Validate that the macros given are okay *
1443 *************************************************/
1445 /* Typically, Exim will drop privileges if macros are supplied. In some
1446 cases, we want to not do so.
1448 Arguments: opt_D_used - true if the commandline had a "-D" option
1449 Returns: true if trusted, false otherwise
1453 macros_trusted(BOOL opt_D_used)
1455 #ifdef WHITELIST_D_MACROS
1456 uschar *whitelisted, *end, *p, **whites;
1457 int white_count, i, n;
1459 BOOL prev_char_item, found;
1464 #ifndef WHITELIST_D_MACROS
1468 /* We only trust -D overrides for some invoking users:
1469 root, the exim run-time user, the optional config owner user.
1470 I don't know why config-owner would be needed, but since they can own the
1471 config files anyway, there's no security risk to letting them override -D. */
1472 if ( ! ((real_uid == root_uid)
1473 || (real_uid == exim_uid)
1474 #ifdef CONFIGURE_OWNER
1475 || (real_uid == config_uid)
1479 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1483 /* Get a list of macros which are whitelisted */
1484 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1485 prev_char_item = FALSE;
1487 for (p = whitelisted; *p != '\0'; ++p)
1489 if (*p == ':' || isspace(*p))
1494 prev_char_item = FALSE;
1497 if (!prev_char_item)
1498 prev_char_item = TRUE;
1505 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1506 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1511 if (i == white_count)
1513 while (*p != '\0' && p < end)
1519 /* The list of commandline macros should be very short.
1520 Accept the N*M complexity. */
1521 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1524 for (uschar ** w = whites; *w; ++w)
1525 if (Ustrcmp(*w, m->name) == 0)
1532 if (!m->replacement)
1534 if ((len = m->replen) == 0)
1536 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1537 0, PCRE_EOPT, NULL, 0);
1540 if (n != PCRE_ERROR_NOMATCH)
1541 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1545 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1551 /*************************************************
1552 * Expansion testing *
1553 *************************************************/
1555 /* Expand and print one item, doing macro-processing.
1558 item line for expansion
1562 expansion_test_line(const uschar * line)
1568 Ustrncpy(big_buffer, line, big_buffer_size);
1569 big_buffer[big_buffer_size-1] = '\0';
1570 len = Ustrlen(big_buffer);
1572 (void) macros_expand(0, &len, &dummy_macexp);
1574 if (isupper(big_buffer[0]))
1576 if (macro_read_assignment(big_buffer))
1577 printf("Defined macro '%s'\n", mlast->name);
1580 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1581 else printf("Failed: %s\n", expand_string_message);
1586 /*************************************************
1587 * Entry point and high-level code *
1588 *************************************************/
1590 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1591 the appropriate action. All the necessary functions are present in the one
1592 binary. I originally thought one should split it up, but it turns out that so
1593 much of the apparatus is needed in each chunk that one might as well just have
1594 it all available all the time, which then makes the coding easier as well.
1597 argc count of entries in argv
1598 argv argument strings, with argv[0] being the program name
1600 Returns: EXIT_SUCCESS if terminated successfully
1601 EXIT_FAILURE otherwise, except when a message has been sent
1602 to the sender, and -oee was given
1606 main(int argc, char **cargv)
1608 uschar **argv = USS cargv;
1609 int arg_receive_timeout = -1;
1610 int arg_smtp_receive_timeout = -1;
1611 int arg_error_handling = error_handling;
1612 int filter_sfd = -1;
1613 int filter_ufd = -1;
1616 int list_queue_option = 0;
1618 int msg_action_arg = -1;
1619 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1620 int queue_only_reason = 0;
1622 int perl_start_option = 0;
1624 int recipients_arg = argc;
1625 int sender_address_domain = 0;
1626 int test_retry_arg = -1;
1627 int test_rewrite_arg = -1;
1628 gid_t original_egid;
1629 BOOL arg_queue_only = FALSE;
1630 BOOL bi_option = FALSE;
1631 BOOL checking = FALSE;
1632 BOOL count_queue = FALSE;
1633 BOOL expansion_test = FALSE;
1634 BOOL extract_recipients = FALSE;
1635 BOOL flag_G = FALSE;
1636 BOOL flag_n = FALSE;
1637 BOOL forced_delivery = FALSE;
1638 BOOL f_end_dot = FALSE;
1639 BOOL deliver_give_up = FALSE;
1640 BOOL list_queue = FALSE;
1641 BOOL list_options = FALSE;
1642 BOOL list_config = FALSE;
1643 BOOL local_queue_only;
1645 BOOL one_msg_action = FALSE;
1646 BOOL opt_D_used = FALSE;
1647 BOOL queue_only_set = FALSE;
1648 BOOL receiving_message = TRUE;
1649 BOOL sender_ident_set = FALSE;
1650 BOOL session_local_queue_only;
1652 BOOL removed_privilege = FALSE;
1653 BOOL usage_wanted = FALSE;
1654 BOOL verify_address_mode = FALSE;
1655 BOOL verify_as_sender = FALSE;
1656 BOOL rcpt_verify_quota = FALSE;
1657 BOOL version_printed = FALSE;
1658 uschar *alias_arg = NULL;
1659 uschar *called_as = US"";
1660 uschar *cmdline_syslog_name = NULL;
1661 uschar *start_queue_run_id = NULL;
1662 uschar *stop_queue_run_id = NULL;
1663 uschar *expansion_test_message = NULL;
1664 const uschar *ftest_domain = NULL;
1665 const uschar *ftest_localpart = NULL;
1666 const uschar *ftest_prefix = NULL;
1667 const uschar *ftest_suffix = NULL;
1668 uschar *log_oneline = NULL;
1669 uschar *malware_test_file = NULL;
1670 uschar *real_sender_address;
1671 uschar *originator_home = US"/";
1675 struct stat statbuf;
1676 pid_t passed_qr_pid = (pid_t)0;
1677 int passed_qr_pipe = -1;
1678 gid_t group_list[EXIM_GROUPLIST_SIZE];
1680 /* For the -bI: flag */
1681 enum commandline_info info_flag = CMDINFO_NONE;
1682 BOOL info_stdout = FALSE;
1684 /* Possible options for -R and -S */
1686 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1688 /* Need to define this in case we need to change the environment in order
1689 to get rid of a bogus time zone. We have to make it char rather than uschar
1690 because some OS define it in /usr/include/unistd.h. */
1692 extern char **environ;
1694 #ifdef MEASURE_TIMING
1695 (void)gettimeofday(×tamp_startup, NULL);
1698 store_init(); /* Initialise the memory allocation susbsystem */
1700 /* If the Exim user and/or group and/or the configuration file owner/group were
1701 defined by ref:name at build time, we must now find the actual uid/gid values.
1702 This is a feature to make the lives of binary distributors easier. */
1704 #ifdef EXIM_USERNAME
1705 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1708 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1710 /* If ref:name uses a number as the name, route_finduser() returns
1711 TRUE with exim_uid set and pw coerced to NULL. */
1713 exim_gid = pw->pw_gid;
1714 #ifndef EXIM_GROUPNAME
1717 "exim: ref:name should specify a usercode, not a group.\n"
1718 "exim: can't let you get away with it unless you also specify a group.\n");
1722 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1725 #ifdef EXIM_GROUPNAME
1726 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1727 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1730 #ifdef CONFIGURE_OWNERNAME
1731 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1732 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1733 CONFIGURE_OWNERNAME);
1736 /* We default the system_filter_user to be the Exim run-time user, as a
1737 sane non-root value. */
1738 system_filter_uid = exim_uid;
1740 #ifdef CONFIGURE_GROUPNAME
1741 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1742 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1743 CONFIGURE_GROUPNAME);
1746 /* In the Cygwin environment, some initialization used to need doing.
1747 It was fudged in by means of this macro; now no longer but we'll leave
1748 it in case of others. */
1754 /* Check a field which is patched when we are running Exim within its
1755 testing harness; do a fast initial check, and then the whole thing. */
1757 f.running_in_test_harness =
1758 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1759 if (f.running_in_test_harness)
1762 /* Protect against abusive argv[0] */
1763 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1765 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1766 at the start of a program; however, it seems that some environments do not
1767 follow this. A "strange" locale can affect the formatting of timestamps, so we
1770 setlocale(LC_ALL, "C");
1772 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1774 #ifdef _POSIX_MONOTONIC_CLOCK
1778 /* Set up the default handler for timing using alarm(). */
1780 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1782 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1783 because store_malloc writes a log entry on failure. */
1785 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1786 exim_fail("exim: failed to get store for log buffer\n");
1788 /* Initialize the default log options. */
1790 bits_set(log_selector, log_selector_size, log_default);
1792 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1793 NULL when the daemon is run and the file is closed. We have to use this
1794 indirection, because some systems don't allow writing to the variable "stderr".
1797 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1799 /* Arrange for the PCRE regex library to use our store functions. Note that
1800 the normal calls are actually macros that add additional arguments for
1801 debugging purposes so we have to assign specially constructed functions here.
1802 The default is to use store in the stacking pool, but this is overridden in the
1803 regex_must_compile() function. */
1805 pcre_malloc = function_store_get;
1806 pcre_free = function_dummy_free;
1808 /* Ensure there is a big buffer for temporary use in several places. It is put
1809 in malloc store so that it can be freed for enlargement if necessary. */
1811 big_buffer = store_malloc(big_buffer_size);
1813 /* Set up the handler for the data request signal, and set the initial
1814 descriptive text. */
1816 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1817 set_process_info("initializing");
1818 os_restarting_signal(SIGUSR1, usr1_handler);
1820 /* If running in a dockerized environment, the TERM signal is only
1821 delegated to the PID 1 if we request it by setting an signal handler */
1822 if (getpid() == 1) signal(SIGTERM, term_handler);
1824 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1825 in the daemon code. For the rest of Exim's uses, we ignore it. */
1827 signal(SIGHUP, SIG_IGN);
1829 /* We don't want to die on pipe errors as the code is written to handle
1830 the write error instead. */
1832 signal(SIGPIPE, SIG_IGN);
1834 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1835 set to SIG_IGN. This causes subprocesses that complete before the parent
1836 process waits for them not to hang around, so when Exim calls wait(), nothing
1837 is there. The wait() code has been made robust against this, but let's ensure
1838 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1839 ending status. We use sigaction rather than plain signal() on those OS where
1840 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1841 problem on AIX with this.) */
1845 struct sigaction act;
1846 act.sa_handler = SIG_DFL;
1847 sigemptyset(&(act.sa_mask));
1849 sigaction(SIGCHLD, &act, NULL);
1852 signal(SIGCHLD, SIG_DFL);
1855 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1860 /* Set up the version number. Set up the leading 'E' for the external form of
1861 message ids, set the pointer to the internal form, and initialize it to
1862 indicate no message being processed. */
1865 message_id_option[0] = '-';
1866 message_id_external = message_id_option + 1;
1867 message_id_external[0] = 'E';
1868 message_id = message_id_external + 1;
1871 /* Set the umask to zero so that any files Exim creates using open() are
1872 created with the modes that it specifies. NOTE: Files created with fopen() have
1873 a problem, which was not recognized till rather late (February 2006). With this
1874 umask, such files will be world writeable. (They are all content scanning files
1875 in the spool directory, which isn't world-accessible, so this is not a
1876 disaster, but it's untidy.) I don't want to change this overall setting,
1877 however, because it will interact badly with the open() calls. Instead, there's
1878 now a function called modefopen() that fiddles with the umask while calling
1883 /* Precompile the regular expression for matching a message id. Keep this in
1884 step with the code that generates ids in the accept.c module. We need to do
1885 this here, because the -M options check their arguments for syntactic validity
1886 using mac_ismsgid, which uses this. */
1889 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1891 /* Precompile the regular expression that is used for matching an SMTP error
1892 code, possibly extended, at the start of an error message. Note that the
1893 terminating whitespace character is included. */
1896 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1899 #ifdef WHITELIST_D_MACROS
1900 /* Precompile the regular expression used to filter the content of macros
1901 given to -D for permissibility. */
1903 regex_whitelisted_macro =
1904 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1907 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1909 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1910 this seems to be a generally accepted convention, since one finds symbolic
1911 links called "mailq" in standard OS configurations. */
1913 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1914 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1917 receiving_message = FALSE;
1918 called_as = US"-mailq";
1921 /* If the program is called as "rmail" treat it as equivalent to
1922 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1923 i.e. preventing a single dot on a line from terminating the message, and
1924 returning with zero return code, even in cases of error (provided an error
1925 message has been sent). */
1927 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1928 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1931 called_as = US"-rmail";
1932 errors_sender_rc = EXIT_SUCCESS;
1935 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1936 this is a smail convention. */
1938 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1939 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1941 smtp_input = smtp_batched_input = TRUE;
1942 called_as = US"-rsmtp";
1945 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1946 this is a smail convention. */
1948 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1949 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1952 receiving_message = FALSE;
1953 called_as = US"-runq";
1956 /* If the program is called as "newaliases" treat it as equivalent to
1957 "exim -bi"; this is a sendmail convention. */
1959 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1960 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1963 receiving_message = FALSE;
1964 called_as = US"-newaliases";
1967 /* Save the original effective uid for a couple of uses later. It should
1968 normally be root, but in some esoteric environments it may not be. */
1970 original_euid = geteuid();
1971 original_egid = getegid();
1973 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1974 to be the same as the real ones. This makes a difference only if Exim is setuid
1975 (or setgid) to something other than root, which could be the case in some
1976 special configurations. */
1978 real_uid = getuid();
1979 real_gid = getgid();
1981 if (real_uid == root_uid)
1983 if ((rv = setgid(real_gid)))
1984 exim_fail("exim: setgid(%ld) failed: %s\n",
1985 (long int)real_gid, strerror(errno));
1986 if ((rv = setuid(real_uid)))
1987 exim_fail("exim: setuid(%ld) failed: %s\n",
1988 (long int)real_uid, strerror(errno));
1991 /* If neither the original real uid nor the original euid was root, Exim is
1992 running in an unprivileged state. */
1994 unprivileged = (real_uid != root_uid && original_euid != root_uid);
1996 /* For most of the args-parsing we need to use permanent pool memory */
1998 int old_pool = store_pool;
1999 store_pool = POOL_PERM;
2001 /* Scan the program's arguments. Some can be dealt with right away; others are
2002 simply recorded for checking and handling afterwards. Do a high-level switch
2003 on the second character (the one after '-'), to save some effort. */
2005 for (i = 1; i < argc; i++)
2007 BOOL badarg = FALSE;
2008 uschar * arg = argv[i];
2012 /* An argument not starting with '-' is the start of a recipients list;
2013 break out of the options-scanning loop. */
2021 /* An option consisting of -- terminates the options */
2023 if (Ustrcmp(arg, "--") == 0)
2025 recipients_arg = i + 1;
2029 /* Handle flagged options */
2031 switchchar = arg[1];
2034 /* Make all -ex options synonymous with -oex arguments, since that
2035 is assumed by various callers. Also make -qR options synonymous with -R
2036 options, as that seems to be required as well. Allow for -qqR too, and
2037 the same for -S options. */
2039 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2040 Ustrncmp(arg+1, "qR", 2) == 0 ||
2041 Ustrncmp(arg+1, "qS", 2) == 0)
2043 switchchar = arg[2];
2046 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2048 switchchar = arg[3];
2050 f.queue_2stage = TRUE;
2053 /* Make -r synonymous with -f, since it is a documented alias */
2055 else if (arg[1] == 'r') switchchar = 'f';
2057 /* Make -ov synonymous with -v */
2059 else if (Ustrcmp(arg, "-ov") == 0)
2065 /* deal with --option_aliases */
2066 else if (switchchar == '-')
2068 if (Ustrcmp(argrest, "help") == 0)
2070 usage_wanted = TRUE;
2073 else if (Ustrcmp(argrest, "version") == 0)
2080 /* High-level switch on active initial letter */
2085 /* sendmail uses -Ac and -Am to control which .cf file is used;
2088 if (!*argrest) { badarg = TRUE; break; }
2091 BOOL ignore = FALSE;
2096 if (*(argrest + 1) == '\0')
2100 if (!ignore) badarg = TRUE;
2104 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2105 so has no need of it. */
2108 if (!*argrest) i++; /* Skip over the type */
2114 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2118 /* -bd: Run in daemon mode, awaiting SMTP connections.
2119 -bdf: Ditto, but in the foreground.
2122 f.daemon_listen = TRUE;
2123 if (*argrest == 'f') f.background_daemon = FALSE;
2124 else if (*argrest) badarg = TRUE;
2127 /* -be: Run in expansion test mode
2128 -bem: Ditto, but read a message from a file first
2131 expansion_test = checking = TRUE;
2132 if (*argrest == 'm')
2134 if (++i >= argc) { badarg = TRUE; break; }
2135 expansion_test_message = argv[i];
2138 if (*argrest) badarg = TRUE;
2141 /* -bF: Run system filter test */
2143 filter_test |= checking = FTEST_SYSTEM;
2144 if (*argrest) badarg = TRUE;
2145 else if (++i < argc) filter_test_sfile = argv[i];
2146 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2149 /* -bf: Run user filter test
2150 -bfd: Set domain for filter testing
2151 -bfl: Set local part for filter testing
2152 -bfp: Set prefix for filter testing
2153 -bfs: Set suffix for filter testing
2158 filter_test |= checking = FTEST_USER;
2159 if (++i < argc) filter_test_ufile = argv[i];
2160 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2165 exim_fail("exim: string expected after %s\n", arg);
2166 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2167 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2168 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2169 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2174 /* -bh: Host checking - an IP address must follow. */
2176 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2178 if (++i >= argc) { badarg = TRUE; break; }
2179 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2180 host_checking = checking = f.log_testing_mode = TRUE;
2181 f.host_checking_callout = *argrest == 'c';
2182 message_logs = FALSE;
2187 /* -bi: This option is used by sendmail to initialize *the* alias file,
2188 though it has the -oA option to specify a different file. Exim has no
2189 concept of *the* alias file, but since Sun's YP make script calls
2190 sendmail this way, some support must be provided. */
2192 if (!*argrest) bi_option = TRUE;
2196 /* -bI: provide information, of the type to follow after a colon.
2197 This is an Exim flag. */
2199 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2201 uschar *p = argrest+1;
2202 info_flag = CMDINFO_HELP;
2204 if (strcmpic(p, CUS"sieve") == 0)
2206 info_flag = CMDINFO_SIEVE;
2209 else if (strcmpic(p, CUS"dscp") == 0)
2211 info_flag = CMDINFO_DSCP;
2214 else if (strcmpic(p, CUS"help") == 0)
2220 /* -bm: Accept and deliver message - the default option. Reinstate
2221 receiving_message, which got turned off for all -b options.
2222 -bmalware: test the filename given for malware */
2224 if (!*argrest) receiving_message = TRUE;
2225 else if (Ustrcmp(argrest, "alware") == 0)
2227 if (++i >= argc) { badarg = TRUE; break; }
2229 malware_test_file = argv[i];
2234 /* -bnq: For locally originating messages, do not qualify unqualified
2235 addresses. In the envelope, this causes errors; in header lines they
2238 if (Ustrcmp(argrest, "q") == 0)
2240 f.allow_unqualified_sender = FALSE;
2241 f.allow_unqualified_recipient = FALSE;
2246 /* -bpxx: List the contents of the mail queue, in various forms. If
2247 the option is -bpc, just a queue count is needed. Otherwise, if the
2248 first letter after p is r, then order is random. */
2250 if (*argrest == 'c')
2253 if (*++argrest) badarg = TRUE;
2257 if (*argrest == 'r')
2259 list_queue_option = 8;
2262 else list_queue_option = 0;
2266 /* -bp: List the contents of the mail queue, top-level only */
2270 /* -bpu: List the contents of the mail queue, top-level undelivered */
2272 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2274 /* -bpa: List the contents of the mail queue, including all delivered */
2276 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2278 /* Unknown after -bp[r] */
2284 /* -bP: List the configuration variables given as the address list.
2285 Force -v, so configuration errors get displayed. */
2288 /* -bP config: we need to setup here, because later,
2289 when list_options is checked, the config is read already */
2292 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2295 readconf_save_config(version_string);
2299 list_options = TRUE;
2300 debug_selector |= D_v;
2301 debug_file = stderr;
2305 /* -brt: Test retry configuration lookup */
2307 if (Ustrcmp(argrest, "t") == 0)
2310 test_retry_arg = i + 1;
2314 /* -brw: Test rewrite configuration */
2316 else if (Ustrcmp(argrest, "w") == 0)
2319 test_rewrite_arg = i + 1;
2325 /* -bS: Read SMTP commands on standard input, but produce no replies -
2326 all errors are reported by sending messages. */
2329 smtp_input = smtp_batched_input = receiving_message = TRUE;
2333 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2334 on standard output. */
2336 if (!*argrest) smtp_input = receiving_message = TRUE;
2340 /* -bt: address testing mode */
2343 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2347 /* -bv: verify addresses */
2350 verify_address_mode = checking = f.log_testing_mode = TRUE;
2352 /* -bvs: verify sender addresses */
2354 else if (Ustrcmp(argrest, "s") == 0)
2356 verify_address_mode = checking = f.log_testing_mode = TRUE;
2357 verify_as_sender = TRUE;
2362 /* -bV: Print version string and support details */
2366 printf("Exim version %s #%s built %s\n", version_string,
2367 version_cnumber, version_date);
2368 printf("%s\n", CS version_copyright);
2369 version_printed = TRUE;
2370 show_whats_supported(stdout);
2371 f.log_testing_mode = TRUE;
2376 /* -bw: inetd wait mode, accept a listening socket as stdin */
2378 f.inetd_wait_mode = TRUE;
2379 f.background_daemon = FALSE;
2380 f.daemon_listen = TRUE;
2382 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2383 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2394 /* -C: change configuration file list; ignore if it isn't really
2395 a change! Enforce a prefix check if required. */
2399 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2400 if (Ustrcmp(config_main_filelist, argrest) != 0)
2402 #ifdef ALT_CONFIG_PREFIX
2404 int len = Ustrlen(ALT_CONFIG_PREFIX);
2405 const uschar *list = argrest;
2407 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2408 while((filename = string_nextinlist(&list, &sep, big_buffer,
2410 if ( ( Ustrlen(filename) < len
2411 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2412 || Ustrstr(filename, "/../") != NULL
2414 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2416 exim_fail("-C Permission denied\n");
2418 if (real_uid != root_uid)
2420 #ifdef TRUSTED_CONFIG_LIST
2422 if (real_uid != exim_uid
2423 #ifdef CONFIGURE_OWNER
2424 && real_uid != config_uid
2427 f.trusted_config = FALSE;
2430 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2433 struct stat statbuf;
2435 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2436 (statbuf.st_uid != root_uid /* owner not root */
2437 #ifdef CONFIGURE_OWNER
2438 && statbuf.st_uid != config_uid /* owner not the special one */
2441 (statbuf.st_gid != root_gid /* group not root */
2442 #ifdef CONFIGURE_GROUP
2443 && statbuf.st_gid != config_gid /* group not the special one */
2445 && (statbuf.st_mode & 020) != 0 /* group writeable */
2447 (statbuf.st_mode & 2) != 0) /* world writeable */
2449 f.trusted_config = FALSE;
2454 /* Well, the trust list at least is up to scratch... */
2456 uschar *trusted_configs[32];
2459 int old_pool = store_pool;
2460 store_pool = POOL_MAIN;
2462 reset_point = store_mark();
2463 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2465 uschar *start = big_buffer, *nl;
2466 while (*start && isspace(*start))
2470 nl = Ustrchr(start, '\n');
2473 trusted_configs[nr_configs++] = string_copy(start);
2474 if (nr_configs == nelem(trusted_configs))
2482 const uschar *list = argrest;
2484 while (f.trusted_config && (filename = string_nextinlist(&list,
2485 &sep, big_buffer, big_buffer_size)))
2487 for (i=0; i < nr_configs; i++)
2488 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2490 if (i == nr_configs)
2492 f.trusted_config = FALSE;
2497 else /* No valid prefixes found in trust_list file. */
2498 f.trusted_config = FALSE;
2499 store_reset(reset_point);
2500 store_pool = old_pool;
2503 else /* Could not open trust_list file. */
2504 f.trusted_config = FALSE;
2507 /* Not root; don't trust config */
2508 f.trusted_config = FALSE;
2512 config_main_filelist = argrest;
2513 f.config_changed = TRUE;
2518 /* -D: set up a macro definition */
2521 #ifdef DISABLE_D_OPTION
2522 exim_fail("exim: -D is not available in this Exim binary\n");
2528 uschar *s = argrest;
2531 while (isspace(*s)) s++;
2533 if (*s < 'A' || *s > 'Z')
2534 exim_fail("exim: macro name set by -D must start with "
2535 "an upper case letter\n");
2537 while (isalnum(*s) || *s == '_')
2539 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2543 if (ptr == 0) { badarg = TRUE; break; }
2544 while (isspace(*s)) s++;
2547 if (*s++ != '=') { badarg = TRUE; break; }
2548 while (isspace(*s)) s++;
2551 for (m = macros_user; m; m = m->next)
2552 if (Ustrcmp(m->name, name) == 0)
2553 exim_fail("exim: duplicated -D in command line\n");
2555 m = macro_create(name, s, TRUE);
2557 if (clmacro_count >= MAX_CLMACROS)
2558 exim_fail("exim: too many -D options on command line\n");
2559 clmacros[clmacro_count++] =
2560 string_sprintf("-D%s=%s", m->name, m->replacement);
2565 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2566 The latter is now a no-op, retained for compatibility only. If -dd is used,
2567 debugging subprocesses of the daemon is disabled. */
2570 if (Ustrcmp(argrest, "ropcr") == 0)
2572 /* drop_cr = TRUE; */
2575 /* Use an intermediate variable so that we don't set debugging while
2576 decoding the debugging bits. */
2580 unsigned int selector = D_default;
2583 if (*argrest == 'd')
2585 f.debug_daemon = TRUE;
2589 decode_bits(&selector, 1, debug_notall, argrest,
2590 debug_options, debug_options_count, US"debug", 0);
2591 debug_selector = selector;
2596 /* -E: This is a local error message. This option is not intended for
2597 external use at all, but is not restricted to trusted callers because it
2598 does no harm (just suppresses certain error messages) and if Exim is run
2599 not setuid root it won't always be trusted when it generates error
2600 messages using this option. If there is a message id following -E, point
2601 message_reference at it, for logging. */
2604 f.local_error_message = TRUE;
2605 if (mac_ismsgid(argrest)) message_reference = argrest;
2609 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2610 option, so it looks as if historically the -oex options are also callable
2611 without the leading -o. So we have to accept them. Before the switch,
2612 anything starting -oe has been converted to -e. Exim does not support all
2613 of the sendmail error options. */
2616 if (Ustrcmp(argrest, "e") == 0)
2618 arg_error_handling = ERRORS_SENDER;
2619 errors_sender_rc = EXIT_SUCCESS;
2621 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2622 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2623 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2624 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2629 /* -F: Set sender's full name, used instead of the gecos entry from
2630 the password file. Since users can usually alter their gecos entries,
2631 there's no security involved in using this instead. The data can follow
2632 the -F or be in the next argument. */
2636 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2637 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2638 f.sender_name_forced = TRUE;
2642 /* -f: Set sender's address - this value is only actually used if Exim is
2643 run by a trusted user, or if untrusted_set_sender is set and matches the
2644 address, except that the null address can always be set by any user. The
2645 test for this happens later, when the value given here is ignored when not
2646 permitted. For an untrusted user, the actual sender is still put in Sender:
2647 if it doesn't match the From: header (unless no_local_from_check is set).
2648 The data can follow the -f or be in the next argument. The -r switch is an
2649 obsolete form of -f but since there appear to be programs out there that
2650 use anything that sendmail has ever supported, better accept it - the
2651 synonymizing is done before the switch above.
2653 At this stage, we must allow domain literal addresses, because we don't
2654 know what the setting of allow_domain_literals is yet. Ditto for trailing
2655 dots and strip_trailing_dot. */
2659 int dummy_start, dummy_end;
2662 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2663 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2665 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2668 uschar * temp = argrest + Ustrlen(argrest) - 1;
2669 while (temp >= argrest && isspace(*temp)) temp--;
2670 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2671 allow_domain_literals = TRUE;
2672 strip_trailing_dot = TRUE;
2674 allow_utf8_domains = TRUE;
2676 if (!(sender_address = parse_extract_address(argrest, &errmess,
2677 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2678 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2680 sender_address = string_copy_taint(sender_address, TRUE);
2682 message_smtputf8 = string_is_utf8(sender_address);
2683 allow_utf8_domains = FALSE;
2685 allow_domain_literals = FALSE;
2686 strip_trailing_dot = FALSE;
2688 f.sender_address_forced = TRUE;
2692 /* -G: sendmail invocation to specify that it's a gateway submission and
2693 sendmail may complain about problems instead of fixing them.
2694 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2695 not at this time complain about problems. */
2701 /* -h: Set the hop count for an incoming message. Exim does not currently
2702 support this; it always computes it by counting the Received: headers.
2703 To put it in will require a change to the spool header file format. */
2707 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2708 if (!isdigit(*argrest)) badarg = TRUE;
2712 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2713 not to be documented for sendmail but mailx (at least) uses it) */
2716 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2720 /* -L: set the identifier used for syslog; equivalent to setting
2721 syslog_processname in the config file, but needs to be an admin option. */
2725 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2726 if ((sz = Ustrlen(argrest)) > 32)
2727 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2729 exim_fail("exim: the -L syslog name is too short\n");
2730 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2734 receiving_message = FALSE;
2736 /* -MC: continue delivery of another message via an existing open
2737 file descriptor. This option is used for an internal call by the
2738 smtp transport when there is a pending message waiting to go to an
2739 address to which it has got a connection. Five subsequent arguments are
2740 required: transport name, host name, IP address, sequence number, and
2741 message_id. Transports may decline to create new processes if the sequence
2742 number gets too big. The channel is stdin. This (-MC) must be the last
2743 argument. There's a subsequent check that the real-uid is privileged.
2745 If we are running in the test harness. delay for a bit, to let the process
2746 that set this one up complete. This makes for repeatability of the logging,
2749 if (Ustrcmp(argrest, "C") == 0)
2751 union sockaddr_46 interface_sock;
2752 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2755 exim_fail("exim: too many or too few arguments after -MC\n");
2757 if (msg_action_arg >= 0)
2758 exim_fail("exim: incompatible arguments\n");
2760 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2761 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2762 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2763 continue_sequence = Uatoi(argv[++i]);
2764 msg_action = MSG_DELIVER;
2765 msg_action_arg = ++i;
2766 forced_delivery = TRUE;
2767 queue_run_pid = passed_qr_pid;
2768 queue_run_pipe = passed_qr_pipe;
2770 if (!mac_ismsgid(argv[i]))
2771 exim_fail("exim: malformed message id %s after -MC option\n",
2774 /* Set up $sending_ip_address and $sending_port, unless proxied */
2776 if (!continue_proxy_cipher)
2777 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2779 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2782 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2785 testharness_pause_ms(500);
2789 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2793 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2794 precedes -MC (see above). The flag indicates that the host to which
2795 Exim is connected has accepted an AUTH sequence. */
2797 case 'A': f.smtp_authenticated = TRUE; break;
2799 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2800 that exim is connected to supports the esmtp extension DSN */
2802 case 'D': smtp_peer_options |= OPTION_DSN; break;
2804 /* -MCd: for debug, set a process-purpose string */
2806 case 'd': if (++i < argc)
2807 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2811 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2812 from the commandline should be tainted - but we will need an untainted
2813 value for the spoolfile when doing a -odi delivery process. */
2815 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2819 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2821 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2823 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2824 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2825 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2827 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2829 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2834 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2835 it preceded -MC (see above) */
2837 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2839 #ifdef SUPPORT_SOCKS
2840 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2841 case 'p': proxy_session = TRUE;
2844 proxy_local_address = string_copy_taint(argv[i], TRUE);
2847 proxy_local_port = Uatoi(argv[i]);
2850 proxy_external_address = string_copy_taint(argv[i], TRUE);
2853 proxy_external_port = Uatoi(argv[i]);
2859 /* -MCQ: pass on the pid of the queue-running process that started
2860 this chain of deliveries and the fd of its synchronizing pipe; this
2861 is useful only when it precedes -MC (see above) */
2863 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2865 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2869 /* -MCq: do a quota check on the given recipient for the given size
2870 of message. Separate from -MC. */
2871 case 'q': rcpt_verify_quota = TRUE;
2872 if (++i < argc) message_size = Uatoi(argv[i]);
2876 /* -MCS: set the smtp_use_size flag; this is useful only when it
2877 precedes -MC (see above) */
2879 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2882 /* -MCs: used with -MCt; SNI was sent */
2883 /* -MCr: ditto, DANE */
2886 case 's': if (++i < argc)
2888 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2889 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2894 /* -MCt: similar to -MCT below but the connection is still open
2895 via a proxy process which handles the TLS context and coding.
2896 Require three arguments for the proxied local address and port,
2897 and the TLS cipher. */
2899 case 't': if (++i < argc)
2900 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2903 sending_port = (int)(Uatol(argv[i]));
2906 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2910 /* -MCT: set the tls_offered flag; this is useful only when it
2911 precedes -MC (see above). The flag indicates that the host to which
2912 Exim is connected has offered TLS support. */
2914 case 'T': smtp_peer_options |= OPTION_TLS; break;
2917 default: badarg = TRUE; break;
2922 /* -M[x]: various operations on the following list of message ids:
2923 -M deliver the messages, ignoring next retry times and thawing
2924 -Mc deliver the messages, checking next retry times, no thawing
2925 -Mf freeze the messages
2926 -Mg give up on the messages
2927 -Mt thaw the messages
2928 -Mrm remove the messages
2929 In the above cases, this must be the last option. There are also the
2930 following options which are followed by a single message id, and which
2931 act on that message. Some of them use the "recipient" addresses as well.
2932 -Mar add recipient(s)
2933 -MG move to a different queue
2934 -Mmad mark all recipients delivered
2935 -Mmd mark recipients(s) delivered
2937 -Mset load a message for use with -be
2939 -Mvc show copy (of whole message, in RFC 2822 format)
2946 msg_action = MSG_DELIVER;
2947 forced_delivery = f.deliver_force_thaw = TRUE;
2949 else if (Ustrcmp(argrest, "ar") == 0)
2951 msg_action = MSG_ADD_RECIPIENT;
2952 one_msg_action = TRUE;
2954 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2955 else if (Ustrcmp(argrest, "es") == 0)
2957 msg_action = MSG_EDIT_SENDER;
2958 one_msg_action = TRUE;
2960 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2961 else if (Ustrcmp(argrest, "g") == 0)
2963 msg_action = MSG_DELIVER;
2964 deliver_give_up = TRUE;
2966 else if (Ustrcmp(argrest, "G") == 0)
2968 msg_action = MSG_SETQUEUE;
2969 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
2971 else if (Ustrcmp(argrest, "mad") == 0)
2973 msg_action = MSG_MARK_ALL_DELIVERED;
2975 else if (Ustrcmp(argrest, "md") == 0)
2977 msg_action = MSG_MARK_DELIVERED;
2978 one_msg_action = TRUE;
2980 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
2981 else if (Ustrcmp(argrest, "set") == 0)
2983 msg_action = MSG_LOAD;
2984 one_msg_action = TRUE;
2986 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2987 else if (Ustrcmp(argrest, "vb") == 0)
2989 msg_action = MSG_SHOW_BODY;
2990 one_msg_action = TRUE;
2992 else if (Ustrcmp(argrest, "vc") == 0)
2994 msg_action = MSG_SHOW_COPY;
2995 one_msg_action = TRUE;
2997 else if (Ustrcmp(argrest, "vh") == 0)
2999 msg_action = MSG_SHOW_HEADER;
3000 one_msg_action = TRUE;
3002 else if (Ustrcmp(argrest, "vl") == 0)
3004 msg_action = MSG_SHOW_LOG;
3005 one_msg_action = TRUE;
3007 else { badarg = TRUE; break; }
3009 /* All the -Mxx options require at least one message id. */
3011 msg_action_arg = i + 1;
3012 if (msg_action_arg >= argc)
3013 exim_fail("exim: no message ids given after %s option\n", arg);
3015 /* Some require only message ids to follow */
3017 if (!one_msg_action)
3019 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3020 exim_fail("exim: malformed message id %s after %s option\n",
3022 goto END_ARG; /* Remaining args are ids */
3025 /* Others require only one message id, possibly followed by addresses,
3026 which will be handled as normal arguments. */
3030 if (!mac_ismsgid(argv[msg_action_arg]))
3031 exim_fail("exim: malformed message id %s after %s option\n",
3032 argv[msg_action_arg], arg);
3038 /* Some programs seem to call the -om option without the leading o;
3039 for sendmail it askes for "me too". Exim always does this. */
3042 if (*argrest) badarg = TRUE;
3046 /* -N: don't do delivery - a debugging option that stops transports doing
3047 their thing. It implies debugging at the D_v level. */
3052 f.dont_deliver = TRUE;
3053 debug_selector |= D_v;
3054 debug_file = stderr;
3060 /* -n: This means "don't alias" in sendmail, apparently.
3061 For normal invocations, it has no effect.
3062 It may affect some other options. */
3068 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3069 option to the specified value. This form uses long names. We need to handle
3070 -O option=value and -Ooption=value. */
3075 exim_fail("exim: string expected after -O\n");
3081 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3084 if (!*(alias_arg = argrest))
3085 if (i+1 < argc) alias_arg = argv[++i];
3086 else exim_fail("exim: string expected after -oA\n");
3089 /* -oB: Set a connection message max value for remote deliveries */
3092 uschar * p = argrest;
3094 if (i+1 < argc && isdigit((argv[i+1][0])))
3098 connection_max_messages = 1;
3105 exim_fail("exim: number expected after -oB\n");
3106 connection_max_messages = Uatoi(p);
3111 /* -odb: background delivery */
3114 if (Ustrcmp(argrest, "b") == 0)
3116 f.synchronous_delivery = FALSE;
3117 arg_queue_only = FALSE;
3118 queue_only_set = TRUE;
3121 /* -odd: testsuite-only: add no inter-process delays */
3123 else if (Ustrcmp(argrest, "d") == 0)
3124 f.testsuite_delays = FALSE;
3126 /* -odf: foreground delivery (smail-compatible option); same effect as
3127 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3130 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3132 f.synchronous_delivery = TRUE;
3133 arg_queue_only = FALSE;
3134 queue_only_set = TRUE;
3137 /* -odq: queue only */
3139 else if (Ustrcmp(argrest, "q") == 0)
3141 f.synchronous_delivery = FALSE;
3142 arg_queue_only = TRUE;
3143 queue_only_set = TRUE;
3146 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3147 but no remote delivery */
3149 else if (Ustrcmp(argrest, "qs") == 0)
3151 f.queue_smtp = TRUE;
3152 arg_queue_only = FALSE;
3153 queue_only_set = TRUE;
3158 /* -oex: Sendmail error flags. As these are also accepted without the
3159 leading -o prefix, for compatibility with vacation and other callers,
3160 they are handled with -e above. */
3162 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3163 -oitrue: Another sendmail syntax for the same */
3166 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3171 /* -oM*: Set various characteristics for an incoming message; actually
3172 acted on for trusted callers only. */
3177 exim_fail("exim: data expected after -oM%s\n", argrest);
3179 /* -oMa: Set sender host address */
3181 if (Ustrcmp(argrest, "a") == 0)
3182 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3184 /* -oMaa: Set authenticator name */
3186 else if (Ustrcmp(argrest, "aa") == 0)
3187 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3189 /* -oMas: setting authenticated sender */
3191 else if (Ustrcmp(argrest, "as") == 0)
3192 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3194 /* -oMai: setting authenticated id */
3196 else if (Ustrcmp(argrest, "ai") == 0)
3197 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3199 /* -oMi: Set incoming interface address */
3201 else if (Ustrcmp(argrest, "i") == 0)
3202 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3204 /* -oMm: Message reference */
3206 else if (Ustrcmp(argrest, "m") == 0)
3208 if (!mac_ismsgid(argv[i+1]))
3209 exim_fail("-oMm must be a valid message ID\n");
3210 if (!f.trusted_config)
3211 exim_fail("-oMm must be called by a trusted user/config\n");
3212 message_reference = argv[++i];
3215 /* -oMr: Received protocol */
3217 else if (Ustrcmp(argrest, "r") == 0)
3219 if (received_protocol)
3220 exim_fail("received_protocol is set already\n");
3222 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3224 /* -oMs: Set sender host name */
3226 else if (Ustrcmp(argrest, "s") == 0)
3227 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3229 /* -oMt: Set sender ident */
3231 else if (Ustrcmp(argrest, "t") == 0)
3233 sender_ident_set = TRUE;
3234 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3237 /* Else a bad argument */
3244 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3245 seem to call this as -m (undocumented), so that is also accepted (see
3247 /* -oo: An ancient flag for old-style addresses which still seems to
3248 crop up in some calls (see in SCO). */
3252 if (*argrest) badarg = TRUE;
3255 /* -oP <name>: set pid file path for daemon
3256 -oPX: delete pid file of daemon */
3259 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3260 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3261 "(uid=%d euid=%d | %d)\n",
3262 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3263 if (!*argrest) override_pid_file_path = argv[++i];
3264 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3269 /* -or <n>: set timeout for non-SMTP acceptance
3270 -os <n>: set timeout for SMTP acceptance */
3275 int * tp = argrest[-1] == 'r'
3276 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3278 *tp = readconf_readtime(argrest, 0, FALSE);
3279 else if (i+1 < argc)
3280 *tp = readconf_readtime(argv[++i], 0, FALSE);
3283 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3287 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3288 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3291 if (*argrest) badarg = TRUE;
3292 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3295 /* -oY: Override creation of daemon notifier socket */
3298 if (*argrest) badarg = TRUE;
3299 else notifier_socket = NULL;
3302 /* Unknown -o argument */
3310 /* -ps: force Perl startup; -pd force delayed Perl startup */
3314 if (*argrest == 's' && argrest[1] == 0)
3316 perl_start_option = 1;
3319 if (*argrest == 'd' && argrest[1] == 0)
3321 perl_start_option = -1;
3326 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3327 which sets the host protocol and host name */
3330 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3334 uschar * hn = Ustrchr(argrest, ':');
3336 if (received_protocol)
3337 exim_fail("received_protocol is set already\n");
3340 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3343 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3344 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3345 sender_host_name = string_copy_taint(hn + 1, TRUE);
3352 receiving_message = FALSE;
3353 if (queue_interval >= 0)
3354 exim_fail("exim: -q specified more than once\n");
3356 /* -qq...: Do queue runs in a 2-stage manner */
3358 if (*argrest == 'q')
3360 f.queue_2stage = TRUE;
3364 /* -qi...: Do only first (initial) deliveries */
3366 if (*argrest == 'i')
3368 f.queue_run_first_delivery = TRUE;
3372 /* -qf...: Run the queue, forcing deliveries
3373 -qff..: Ditto, forcing thawing as well */
3375 if (*argrest == 'f')
3377 f.queue_run_force = TRUE;
3378 if (*++argrest == 'f')
3380 f.deliver_force_thaw = TRUE;
3385 /* -q[f][f]l...: Run the queue only on local deliveries */
3387 if (*argrest == 'l')
3389 f.queue_run_local = TRUE;
3393 /* -q[f][f][l][G<name>]... Work on the named queue */
3395 if (*argrest == 'G')
3398 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3399 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3400 queue_name = string_copyn(argrest, i);
3402 if (*argrest == '/') argrest++;
3405 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3406 only, optionally named, optionally starting from a given message id. */
3408 if (!(list_queue || count_queue))
3410 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3413 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3414 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3415 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3416 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3419 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3420 forced, optionally local only, optionally named. */
3422 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3424 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3428 case 'R': /* Synonymous with -qR... */
3430 const uschar *tainted_selectstr;
3432 receiving_message = FALSE;
3434 /* -Rf: As -R (below) but force all deliveries,
3435 -Rff: Ditto, but also thaw all frozen messages,
3436 -Rr: String is regex
3437 -Rrf: Regex and force
3438 -Rrff: Regex and force and thaw
3440 in all cases provided there are no further characters in this
3444 for (int i = 0; i < nelem(rsopts); i++)
3445 if (Ustrcmp(argrest, rsopts[i]) == 0)
3447 if (i != 2) f.queue_run_force = TRUE;
3448 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3449 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3450 argrest += Ustrlen(rsopts[i]);
3453 /* -R: Set string to match in addresses for forced queue run to
3454 pick out particular messages. */
3456 /* Avoid attacks from people providing very long strings, and do so before
3459 tainted_selectstr = argrest;
3460 else if (i+1 < argc)
3461 tainted_selectstr = argv[++i];
3463 exim_fail("exim: string expected after -R\n");
3464 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3468 /* -r: an obsolete synonym for -f (see above) */
3471 /* -S: Like -R but works on sender. */
3473 case 'S': /* Synonymous with -qS... */
3475 const uschar *tainted_selectstr;
3477 receiving_message = FALSE;
3479 /* -Sf: As -S (below) but force all deliveries,
3480 -Sff: Ditto, but also thaw all frozen messages,
3481 -Sr: String is regex
3482 -Srf: Regex and force
3483 -Srff: Regex and force and thaw
3485 in all cases provided there are no further characters in this
3489 for (int i = 0; i < nelem(rsopts); i++)
3490 if (Ustrcmp(argrest, rsopts[i]) == 0)
3492 if (i != 2) f.queue_run_force = TRUE;
3493 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3494 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3495 argrest += Ustrlen(rsopts[i]);
3498 /* -S: Set string to match in addresses for forced queue run to
3499 pick out particular messages. */
3502 tainted_selectstr = argrest;
3503 else if (i+1 < argc)
3504 tainted_selectstr = argv[++i];
3506 exim_fail("exim: string expected after -S\n");
3507 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3511 /* -Tqt is an option that is exclusively for use by the testing suite.
3512 It is not recognized in other circumstances. It allows for the setting up
3513 of explicit "queue times" so that various warning/retry things can be
3514 tested. Otherwise variability of clock ticks etc. cause problems. */
3517 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3518 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3523 /* -t: Set flag to extract recipients from body of message. */
3526 if (!*argrest) extract_recipients = TRUE;
3528 /* -ti: Set flag to extract recipients from body of message, and also
3529 specify that dot does not end the message. */
3531 else if (Ustrcmp(argrest, "i") == 0)
3533 extract_recipients = TRUE;
3537 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3540 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3547 /* -U: This means "initial user submission" in sendmail, apparently. The
3548 doc claims that in future sendmail may refuse syntactically invalid
3549 messages instead of fixing them. For the moment, we just ignore it. */
3555 /* -v: verify things - this is a very low-level debugging */
3560 debug_selector |= D_v;
3561 debug_file = stderr;
3567 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3569 The -x flag tells the sendmail command that mail from a local
3570 mail program has National Language Support (NLS) extended characters
3571 in the body of the mail item. The sendmail command can send mail with
3572 extended NLS characters across networks that normally corrupts these
3575 As Exim is 8-bit clean, it just ignores this flag. */
3578 if (*argrest) badarg = TRUE;
3581 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3582 logs to that file. We swallow the parameter and otherwise ignore it. */
3587 exim_fail("exim: string expected after -X\n");
3590 /* -z: a line of text to log */
3595 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3597 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3600 /* All other initial characters are errors */
3605 } /* End of high-level switch statement */
3607 /* Failed to recognize the option, or syntax error */
3610 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3611 "option %s\n", arg);
3615 /* If -R or -S have been specified without -q, assume a single queue run. */
3617 if ( (deliver_selectstring || deliver_selectstring_sender)
3618 && queue_interval < 0)
3623 store_pool = old_pool;
3626 /* If usage_wanted is set we call the usage function - which never returns */
3627 if (usage_wanted) exim_usage(called_as);
3629 /* Arguments have been processed. Check for incompatibilities. */
3630 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3631 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3632 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3633 || filter_test != FTEST_NONE
3634 || msg_action_arg > 0 && !one_msg_action
3636 || ( msg_action_arg > 0
3637 && ( f.daemon_listen || queue_interval > 0 || list_options
3638 || checking && msg_action != MSG_LOAD
3639 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3641 || ( (f.daemon_listen || queue_interval > 0)
3642 && ( sender_address || list_options || list_queue || checking
3645 || f.daemon_listen && queue_interval == 0
3646 || f.inetd_wait_mode && queue_interval >= 0
3648 && ( checking || smtp_input || extract_recipients
3649 || filter_test != FTEST_NONE || bi_option
3651 || ( verify_address_mode
3652 && ( f.address_test_mode || smtp_input || extract_recipients
3653 || filter_test != FTEST_NONE || bi_option
3655 || ( f.address_test_mode
3656 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3660 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3662 || deliver_selectstring && queue_interval < 0
3663 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3665 exim_fail("exim: incompatible command-line options or arguments\n");
3667 /* If debugging is set up, set the file and the file descriptor to pass on to
3668 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3669 to run in the foreground. */
3671 if (debug_selector != 0)
3673 debug_file = stderr;
3674 debug_fd = fileno(debug_file);
3675 f.background_daemon = FALSE;
3676 testharness_pause_ms(100); /* lets caller finish */
3677 if (debug_selector != D_v) /* -v only doesn't show this */
3679 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3680 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3682 if (!version_printed)
3683 show_whats_supported(stderr);
3687 /* When started with root privilege, ensure that the limits on the number of
3688 open files and the number of processes (where that is accessible) are
3689 sufficiently large, or are unset, in case Exim has been called from an
3690 environment where the limits are screwed down. Not all OS have the ability to
3691 change some of these limits. */
3695 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3701 #ifdef RLIMIT_NOFILE
3702 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3704 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3706 rlp.rlim_cur = rlp.rlim_max = 0;
3709 /* I originally chose 1000 as a nice big number that was unlikely to
3710 be exceeded. It turns out that some older OS have a fixed upper limit of
3713 if (rlp.rlim_cur < 1000)
3715 rlp.rlim_cur = rlp.rlim_max = 1000;
3716 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3718 rlp.rlim_cur = rlp.rlim_max = 256;
3719 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3720 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3727 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3729 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3731 rlp.rlim_cur = rlp.rlim_max = 0;
3734 #ifdef RLIM_INFINITY
3735 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3737 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3739 if (rlp.rlim_cur < 1000)
3741 rlp.rlim_cur = rlp.rlim_max = 1000;
3743 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3744 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3750 /* Exim is normally entered as root (but some special configurations are
3751 possible that don't do this). However, it always spins off sub-processes that
3752 set their uid and gid as required for local delivery. We don't want to pass on
3753 any extra groups that root may belong to, so we want to get rid of them all at
3756 We need to obey setgroups() at this stage, before possibly giving up root
3757 privilege for a changed configuration file, but later on we might need to
3758 check on the additional groups for the admin user privilege - can't do that
3759 till after reading the config, which might specify the exim gid. Therefore,
3760 save the group list here first. */
3762 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3763 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3765 /* There is a fundamental difference in some BSD systems in the matter of
3766 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3767 known not to be different. On the "different" systems there is a single group
3768 list, and the first entry in it is the current group. On all other versions of
3769 Unix there is a supplementary group list, which is in *addition* to the current
3770 group. Consequently, to get rid of all extraneous groups on a "standard" system
3771 you pass over 0 groups to setgroups(), while on a "different" system you pass
3772 over a single group - the current group, which is always the first group in the
3773 list. Calling setgroups() with zero groups on a "different" system results in
3774 an error return. The following code should cope with both types of system.
3776 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3777 the "setgroups() with zero groups" - and changes the egid.
3778 Thanks to that we had to stash the original_egid above, for use below
3779 in the call to exim_setugid().
3781 However, if this process isn't running as root, setgroups() can't be used
3782 since you have to be root to run it, even if throwing away groups.
3783 Except, sigh, for Hurd - where you can.
3784 Not being root here happens only in some unusual configurations. */
3787 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3788 && setgroups(0, NULL) != 0
3790 && setgroups(1, group_list) != 0)
3791 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3793 /* If the configuration file name has been altered by an argument on the
3794 command line (either a new file name or a macro definition) and the caller is
3795 not root, or if this is a filter testing run, remove any setuid privilege the
3796 program has and run as the underlying user.
3798 The exim user is locked out of this, which severely restricts the use of -C
3801 Otherwise, set the real ids to the effective values (should be root unless run
3802 from inetd, which it can either be root or the exim uid, if one is configured).
3804 There is a private mechanism for bypassing some of this, in order to make it
3805 possible to test lots of configurations automatically, without having either to
3806 recompile each time, or to patch in an actual configuration file name and other
3807 values (such as the path name). If running in the test harness, pretend that
3808 configuration file changes and macro definitions haven't happened. */
3811 (!f.trusted_config || /* Config changed, or */
3812 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3813 real_uid != root_uid && /* Not root, and */
3814 !f.running_in_test_harness /* Not fudged */
3816 expansion_test /* expansion testing */
3818 filter_test != FTEST_NONE) /* Filter testing */
3820 setgroups(group_count, group_list);
3821 exim_setugid(real_uid, real_gid, FALSE,
3822 US"-C, -D, -be or -bf forces real uid");
3823 removed_privilege = TRUE;
3825 /* In the normal case when Exim is called like this, stderr is available
3826 and should be used for any logging information because attempts to write
3827 to the log will usually fail. To arrange this, we unset really_exim. However,
3828 if no stderr is available there is no point - we might as well have a go
3829 at the log (if it fails, syslog will be written).
3831 Note that if the invoker is Exim, the logs remain available. Messing with
3832 this causes unlogged successful deliveries. */
3834 if (log_stderr && real_uid != exim_uid)
3835 f.really_exim = FALSE;
3838 /* Privilege is to be retained for the moment. It may be dropped later,
3839 depending on the job that this Exim process has been asked to do. For now, set
3840 the real uid to the effective so that subsequent re-execs of Exim are done by a
3844 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3846 /* If testing a filter, open the file(s) now, before wasting time doing other
3847 setups and reading the message. */
3849 if (filter_test & FTEST_SYSTEM)
3850 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3851 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3854 if (filter_test & FTEST_USER)
3855 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3856 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3859 /* Initialise lookup_list
3860 If debugging, already called above via version reporting.
3861 In either case, we initialise the list of available lookups while running
3862 as root. All dynamically modules are loaded from a directory which is
3863 hard-coded into the binary and is code which, if not a module, would be
3864 part of Exim already. Ability to modify the content of the directory
3865 is equivalent to the ability to modify a setuid binary!
3867 This needs to happen before we read the main configuration. */
3871 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3874 /* Read the main runtime configuration data; this gives up if there
3875 is a failure. It leaves the configuration file open so that the subsequent
3876 configuration data for delivery can be read if needed.
3878 NOTE: immediately after opening the configuration file we change the working
3879 directory to "/"! Later we change to $spool_directory. We do it there, because
3880 during readconf_main() some expansion takes place already. */
3882 /* Store the initial cwd before we change directories. Can be NULL if the
3883 dir has already been unlinked. */
3884 initial_cwd = os_getcwd(NULL, 0);
3885 if (!initial_cwd && errno)
3886 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3888 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3889 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3892 -be[m] expansion test -
3893 -b[fF] filter test new
3895 -bmalware malware_test_file new
3897 -brw rewrite test new
3899 -bv[s] address verify -
3901 -bP <option> (except -bP config, which sets list_config)
3903 If any of these options is set, we suppress warnings about configuration
3904 issues (currently about tls_advertise_hosts and keep_environment not being
3908 #ifdef MEASURE_TIMING
3909 struct timeval t0, diff;
3910 (void)gettimeofday(&t0, NULL);
3913 readconf_main(checking || list_options);
3915 #ifdef MEASURE_TIMING
3916 report_time_since(&t0, US"readconf_main (delta)");
3921 /* Now in directory "/" */
3923 if (cleanup_environment() == FALSE)
3924 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3927 /* If an action on specific messages is requested, or if a daemon or queue
3928 runner is being started, we need to know if Exim was called by an admin user.
3929 This is the case if the real user is root or exim, or if the real group is
3930 exim, or if one of the supplementary groups is exim or a group listed in
3931 admin_groups. We don't fail all message actions immediately if not admin_user,
3932 since some actions can be performed by non-admin users. Instead, set admin_user
3933 for later interrogation. */
3935 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3936 f.admin_user = TRUE;
3938 for (int i = 0; i < group_count && !f.admin_user; i++)
3939 if (group_list[i] == exim_gid)
3940 f.admin_user = TRUE;
3941 else if (admin_groups)
3942 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
3943 if (admin_groups[j] == group_list[i])
3944 f.admin_user = TRUE;
3946 /* Another group of privileged users are the trusted users. These are root,
3947 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3948 are permitted to specify sender_addresses with -f on the command line, and
3949 other message parameters as well. */
3951 if (real_uid == root_uid || real_uid == exim_uid)
3952 f.trusted_caller = TRUE;
3956 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
3957 if (trusted_users[i] == real_uid)
3958 f.trusted_caller = TRUE;
3961 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
3962 if (trusted_groups[i] == real_gid)
3963 f.trusted_caller = TRUE;
3964 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
3965 if (trusted_groups[i] == group_list[j])
3966 f.trusted_caller = TRUE;
3969 /* At this point, we know if the user is privileged and some command-line
3970 options become possibly impermissible, depending upon the configuration file. */
3972 if (checking && commandline_checks_require_admin && !f.admin_user)
3973 exim_fail("exim: those command-line flags are set to require admin\n");
3975 /* Handle the decoding of logging options. */
3977 decode_bits(log_selector, log_selector_size, log_notall,
3978 log_selector_string, log_options, log_options_count, US"log", 0);
3982 debug_printf("configuration file is %s\n", config_main_filename);
3983 debug_printf("log selectors =");
3984 for (int i = 0; i < log_selector_size; i++)
3985 debug_printf(" %08x", log_selector[i]);
3989 /* If domain literals are not allowed, check the sender address that was
3990 supplied with -f. Ditto for a stripped trailing dot. */
3994 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3995 exim_fail("exim: bad -f address \"%s\": domain literals not "
3996 "allowed\n", sender_address);
3997 if (f_end_dot && !strip_trailing_dot)
3998 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3999 "(trailing dot not allowed)\n", sender_address);
4002 /* See if an admin user overrode our logging. */
4004 if (cmdline_syslog_name)
4007 syslog_processname = cmdline_syslog_name;
4008 log_file_path = string_copy(CUS"syslog");
4011 /* not a panic, non-privileged users should not be able to spam paniclog */
4013 "exim: you lack sufficient privilege to specify syslog process name\n");
4015 /* Paranoia check of maximum lengths of certain strings. There is a check
4016 on the length of the log file path in log.c, which will come into effect
4017 if there are any calls to write the log earlier than this. However, if we
4018 get this far but the string is very long, it is better to stop now than to
4019 carry on and (e.g.) receive a message and then have to collapse. The call to
4020 log_write() from here will cause the ultimate panic collapse if the complete
4021 file name exceeds the buffer length. */
4023 if (Ustrlen(log_file_path) > 200)
4024 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4025 "log_file_path is longer than 200 chars: aborting");
4027 if (Ustrlen(pid_file_path) > 200)
4028 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4029 "pid_file_path is longer than 200 chars: aborting");
4031 if (Ustrlen(spool_directory) > 200)
4032 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4033 "spool_directory is longer than 200 chars: aborting");
4035 /* Length check on the process name given to syslog for its TAG field,
4036 which is only permitted to be 32 characters or less. See RFC 3164. */
4038 if (Ustrlen(syslog_processname) > 32)
4039 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4040 "syslog_processname is longer than 32 chars: aborting");
4045 log_write(0, LOG_MAIN, "%s", log_oneline);
4046 return EXIT_SUCCESS;
4049 return EXIT_FAILURE;
4051 /* In some operating systems, the environment variable TMPDIR controls where
4052 temporary files are created; Exim doesn't use these (apart from when delivering
4053 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4054 If TMPDIR is found in the environment, reset it to the value defined in the
4055 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4056 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4057 EXIM_TMPDIR by the build scripts.
4061 if (environ) for (uschar ** p = USS environ; *p; p++)
4062 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4064 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4065 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4067 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4071 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4072 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4073 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4074 called by a user who has set the TZ variable. This then affects the timestamps
4075 in log files and in Received: headers, and any created Date: header lines. The
4076 required timezone is settable in the configuration file, so nothing can be done
4077 about this earlier - but hopefully nothing will normally be logged earlier than
4078 this. We have to make a new environment if TZ is wrong, but don't bother if
4079 timestamps_utc is set, because then all times are in UTC anyway. */
4081 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4082 f.timestamps_utc = TRUE;
4085 uschar *envtz = US getenv("TZ");
4087 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4088 : timezone_string != NULL
4091 uschar **p = USS environ;
4095 if (environ) while (*p++) count++;
4096 if (!envtz) count++;
4097 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4098 if (environ) for (p = USS environ; *p; p++)
4099 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4100 if (timezone_string)
4102 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4103 sprintf(CS *newp++, "TZ=%s", timezone_string);
4108 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4109 tod_stamp(tod_log));
4113 /* Handle the case when we have removed the setuid privilege because of -C or
4114 -D. This means that the caller of Exim was not root.
4116 There is a problem if we were running as the Exim user. The sysadmin may
4117 expect this case to retain privilege because "the binary was called by the
4118 Exim user", but it hasn't, because either the -D option set macros, or the
4119 -C option set a non-trusted configuration file. There are two possibilities:
4121 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4122 to do message deliveries. Thus, the fact that it is running as a
4123 non-privileged user is plausible, and might be wanted in some special
4124 configurations. However, really_exim will have been set false when
4125 privilege was dropped, to stop Exim trying to write to its normal log
4126 files. Therefore, re-enable normal log processing, assuming the sysadmin
4127 has set up the log directory correctly.
4129 (2) If deliver_drop_privilege is not set, the configuration won't work as
4130 apparently intended, and so we log a panic message. In order to retain
4131 root for -C or -D, the caller must either be root or be invoking a
4132 trusted configuration file (when deliver_drop_privilege is false). */
4134 if ( removed_privilege
4135 && (!f.trusted_config || opt_D_used)
4136 && real_uid == exim_uid)
4137 if (deliver_drop_privilege)
4138 f.really_exim = TRUE; /* let logging work normally */
4140 log_write(0, LOG_MAIN|LOG_PANIC,
4141 "exim user lost privilege for using %s option",
4142 f.trusted_config? "-D" : "-C");
4144 /* Start up Perl interpreter if Perl support is configured and there is a
4145 perl_startup option, and the configuration or the command line specifies
4146 initializing starting. Note that the global variables are actually called
4147 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4150 if (perl_start_option != 0)
4151 opt_perl_at_start = (perl_start_option > 0);
4152 if (opt_perl_at_start && opt_perl_startup != NULL)
4155 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4156 if ((errstr = init_perl(opt_perl_startup)))
4157 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4158 opt_perl_started = TRUE;
4160 #endif /* EXIM_PERL */
4162 /* Log the arguments of the call if the configuration file said so. This is
4163 a debugging feature for finding out what arguments certain MUAs actually use.
4164 Don't attempt it if logging is disabled, or if listing variables or if
4165 verifying/testing addresses or expansions. */
4167 if ( (debug_selector & D_any || LOGGING(arguments))
4168 && f.really_exim && !list_options && !checking)
4170 uschar *p = big_buffer;
4171 Ustrcpy(p, US"cwd= (failed)");
4178 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4179 p += Ustrlen(CCS p);
4182 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4184 for (int i = 0; i < argc; i++)
4186 int len = Ustrlen(argv[i]);
4187 const uschar *printing;
4189 if (p + len + 8 >= big_buffer + big_buffer_size)
4191 Ustrcpy(p, US" ...");
4192 log_write(0, LOG_MAIN, "%s", big_buffer);
4193 Ustrcpy(big_buffer, US"...");
4196 printing = string_printing(argv[i]);
4197 if (!*printing) quote = US"\"";
4200 const uschar *pp = printing;
4202 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4204 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4205 (p - big_buffer) - 4), printing, quote);
4208 if (LOGGING(arguments))
4209 log_write(0, LOG_MAIN, "%s", big_buffer);
4211 debug_printf("%s\n", big_buffer);
4214 /* Set the working directory to be the top-level spool directory. We don't rely
4215 on this in the code, which always uses fully qualified names, but it's useful
4216 for core dumps etc. Don't complain if it fails - the spool directory might not
4217 be generally accessible and calls with the -C option (and others) have lost
4218 privilege by now. Before the chdir, we try to ensure that the directory exists.
4221 if (Uchdir(spool_directory) != 0)
4223 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4224 (void) Uchdir(spool_directory);
4227 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4228 alias file. Exim doesn't have such a concept, but this call is screwed into
4229 Sun's YP makefiles. Handle this by calling a configured script, as the real
4230 user who called Exim. The -oA option can be used to pass an argument to the
4235 (void) fclose(config_file);
4236 if (bi_command && *bi_command)
4240 argv[i++] = bi_command;
4241 if (alias_arg) argv[i++] = alias_arg;
4244 setgroups(group_count, group_list);
4245 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4247 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4248 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4250 execv(CS argv[0], (char *const *)argv);
4251 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4255 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4260 /* We moved the admin/trusted check to be immediately after reading the
4261 configuration file. We leave these prints here to ensure that syslog setup,
4262 logfile setup, and so on has already happened. */
4264 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4265 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4267 /* Only an admin user may start the daemon or force a queue run in the default
4268 configuration, but the queue run restriction can be relaxed. Only an admin
4269 user may request that a message be returned to its sender forthwith. Only an
4270 admin user may specify a debug level greater than D_v (because it might show
4271 passwords, etc. in lookup queries). Only an admin user may request a queue
4272 count. Only an admin user can use the test interface to scan for email
4273 (because Exim will be in the spool dir and able to look at mails). */
4277 BOOL debugset = (debug_selector & ~D_v) != 0;
4278 if ( deliver_give_up || f.daemon_listen || malware_test_file
4279 || count_queue && queue_list_requires_admin
4280 || list_queue && queue_list_requires_admin
4281 || queue_interval >= 0 && prod_requires_admin
4282 || queue_name_dest && prod_requires_admin
4283 || debugset && !f.running_in_test_harness
4285 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4288 /* If the real user is not root or the exim uid, the argument for passing
4289 in an open TCP/IP connection for another message is not permitted, nor is
4290 running with the -N option for any delivery action, unless this call to exim is
4291 one that supplied an input message, or we are using a patched exim for
4292 regression testing. */
4294 if ( real_uid != root_uid && real_uid != exim_uid
4295 && ( continue_hostname
4297 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4299 && !f.running_in_test_harness
4301 exim_fail("exim: Permission denied\n");
4303 /* If the caller is not trusted, certain arguments are ignored when running for
4304 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4305 Note that authority for performing certain actions on messages is tested in the
4306 queue_action() function. */
4308 if (!f.trusted_caller && !checking)
4310 sender_host_name = sender_host_address = interface_address =
4311 sender_ident = received_protocol = NULL;
4312 sender_host_port = interface_port = 0;
4313 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4316 /* If a sender host address is set, extract the optional port number off the
4317 end of it and check its syntax. Do the same thing for the interface address.
4318 Exim exits if the syntax is bad. */
4322 if (sender_host_address)
4323 sender_host_port = check_port(sender_host_address);
4324 if (interface_address)
4325 interface_port = check_port(interface_address);
4328 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4331 if (f.trusted_caller)
4333 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4334 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4337 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4340 /* If an SMTP message is being received check to see if the standard input is a
4341 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4342 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4347 union sockaddr_46 inetd_sock;
4348 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4349 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4351 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4352 if (family == AF_INET || family == AF_INET6)
4354 union sockaddr_46 interface_sock;
4355 size = sizeof(interface_sock);
4357 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4358 interface_address = host_ntoa(-1, &interface_sock, NULL,
4361 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4363 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4366 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4367 NULL, &sender_host_port);
4368 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4369 "inetd is not supported when mua_wrapper is set");
4373 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4378 /* If the load average is going to be needed while receiving a message, get it
4379 now for those OS that require the first call to os_getloadavg() to be done as
4380 root. There will be further calls later for each message received. */
4382 #ifdef LOAD_AVG_NEEDS_ROOT
4383 if ( receiving_message
4384 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4385 load_average = OS_GETLOADAVG();
4388 /* The queue_only configuration option can be overridden by -odx on the command
4389 line, except that if queue_only_override is false, queue_only cannot be unset
4390 from the command line. */
4392 if (queue_only_set && (queue_only_override || arg_queue_only))
4393 queue_only = arg_queue_only;
4395 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4398 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4399 if (arg_smtp_receive_timeout >= 0)
4400 smtp_receive_timeout = arg_smtp_receive_timeout;
4402 /* If Exim was started with root privilege, unless we have already removed the
4403 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4404 except when starting the daemon or doing some kind of delivery or address
4405 testing (-bt). These are the only cases when root need to be retained. We run
4406 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4407 retained only for starting the daemon. We always do the initgroups() in this
4408 situation (controlled by the TRUE below), in order to be as close as possible
4409 to the state Exim usually runs in. */
4411 if ( !unprivileged /* originally had root AND */
4412 && !removed_privilege /* still got root AND */
4413 && !f.daemon_listen /* not starting the daemon */
4414 && queue_interval <= 0 /* (either kind of daemon) */
4415 && ( /* AND EITHER */
4416 deliver_drop_privilege /* requested unprivileged */
4418 queue_interval < 0 /* not running the queue */
4419 && ( msg_action_arg < 0 /* and */
4420 || msg_action != MSG_DELIVER /* not delivering */
4422 && (!checking || !f.address_test_mode) /* not address checking */
4423 && !rcpt_verify_quota /* and not quota checking */
4425 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4427 /* When we are retaining a privileged uid, we still change to the exim gid. */
4432 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4433 rv = setgid(exim_gid);
4434 /* Impact of failure is that some stuff might end up with an incorrect group.
4435 We track this for failures from root, since any attempt to change privilege
4436 by root should succeed and failures should be examined. For non-root,
4437 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4438 no need to complain then. */
4440 if (!(unprivileged || removed_privilege))
4441 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4444 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4445 (long int)exim_gid, strerror(errno));
4449 /* Handle a request to scan a file for malware */
4450 if (malware_test_file)
4452 #ifdef WITH_CONTENT_SCAN
4454 set_process_info("scanning file for malware");
4455 if ((result = malware_in_file(malware_test_file)) == FAIL)
4457 printf("No malware found.\n");
4462 printf("Malware lookup returned non-okay/fail: %d\n", result);
4466 printf("Malware found: %s\n", malware_name);
4468 printf("Malware scan detected malware of unknown name.\n");
4470 printf("Malware scanning not enabled at compile time.\n");
4475 /* Handle a request to list the delivery queue */
4479 set_process_info("listing the queue");
4480 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4484 /* Handle a request to count the delivery queue */
4488 set_process_info("counting the queue");
4489 fprintf(stdout, "%u\n", queue_count());
4493 /* Handle actions on specific messages, except for the force delivery and
4494 message load actions, which are done below. Some actions take a whole list of
4495 message ids, which are known to continue up to the end of the arguments. Others
4496 take a single message id and then operate on the recipients list. */
4498 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4500 int yield = EXIT_SUCCESS;
4501 set_process_info("acting on specified messages");
4503 /* ACL definitions may be needed when removing a message (-Mrm) because
4504 event_action gets expanded */
4506 if (msg_action == MSG_REMOVE)
4509 if (!one_msg_action)
4511 for (i = msg_action_arg; i < argc; i++)
4512 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4513 yield = EXIT_FAILURE;
4516 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4517 default: printf("\n"); break;
4521 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4522 recipients_arg)) yield = EXIT_FAILURE;
4526 /* We used to set up here to skip reading the ACL section, on
4527 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4528 Now, since the intro of the ${acl } expansion, ACL definitions may be
4529 needed in transports so we lost the optimisation. */
4532 #ifdef MEASURE_TIMING
4533 struct timeval t0, diff;
4534 (void)gettimeofday(&t0, NULL);
4539 #ifdef MEASURE_TIMING
4540 report_time_since(&t0, US"readconf_rest (delta)");
4544 /* Handle a request to check quota */
4545 if (rcpt_verify_quota)
4546 if (real_uid != root_uid && real_uid != exim_uid)
4547 exim_fail("exim: Permission denied\n");
4548 else if (recipients_arg >= argc)
4549 exim_fail("exim: missing recipient for quota check\n");
4552 verify_quota(argv[recipients_arg]);
4553 exim_exit(EXIT_SUCCESS);
4556 /* Handle the -brt option. This is for checking out retry configurations.
4557 The next three arguments are a domain name or a complete address, and
4558 optionally two error numbers. All it does is to call the function that
4559 scans the retry configuration data. */
4561 if (test_retry_arg >= 0)
4563 retry_config *yield;
4564 int basic_errno = 0;
4566 const uschar *s1, *s2;
4568 if (test_retry_arg >= argc)
4570 printf("-brt needs a domain or address argument\n");
4571 exim_exit(EXIT_FAILURE);
4573 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4576 /* If the first argument contains no @ and no . it might be a local user
4577 or it might be a single-component name. Treat as a domain. */
4579 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4581 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4582 "being \ntreated as a one-component domain, not as a local part.\n\n",
4586 /* There may be an optional second domain arg. */
4588 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4589 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4591 /* The final arg is an error name */
4593 if (test_retry_arg < argc)
4595 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4597 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4600 printf("%s\n", CS error);
4601 return EXIT_FAILURE;
4604 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4605 code > 100 as an error is for matching codes to the decade. Turn them into
4606 a real error code, off the decade. */
4608 if (basic_errno == ERRNO_MAIL4XX ||
4609 basic_errno == ERRNO_RCPT4XX ||
4610 basic_errno == ERRNO_DATA4XX)
4612 int code = (more_errno >> 8) & 255;
4614 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4615 else if (code > 100)
4616 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4620 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4621 printf("No retry information found\n");
4624 more_errno = yield->more_errno;
4625 printf("Retry rule: %s ", yield->pattern);
4627 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4629 printf("quota%s%s ",
4630 (more_errno > 0)? "_" : "",
4631 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4633 else if (yield->basic_errno == ECONNREFUSED)
4635 printf("refused%s%s ",
4636 (more_errno > 0)? "_" : "",
4637 (more_errno == 'M')? "MX" :
4638 (more_errno == 'A')? "A" : "");
4640 else if (yield->basic_errno == ETIMEDOUT)
4643 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4645 if (more_errno != 0) printf("_%s",
4646 (more_errno == 'M')? "MX" : "A");
4649 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4650 printf("auth_failed ");
4653 for (retry_rule * r = yield->rules; r; r = r->next)
4655 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4656 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4662 printf(",%d.", x/1000);
4676 exim_exit(EXIT_SUCCESS);
4679 /* Handle a request to list one or more configuration options */
4680 /* If -n was set, we suppress some information */
4685 set_process_info("listing variables");
4686 if (recipients_arg >= argc)
4687 fail = !readconf_print(US"all", NULL, flag_n);
4688 else for (i = recipients_arg; i < argc; i++)
4691 (Ustrcmp(argv[i], "router") == 0 ||
4692 Ustrcmp(argv[i], "transport") == 0 ||
4693 Ustrcmp(argv[i], "authenticator") == 0 ||
4694 Ustrcmp(argv[i], "macro") == 0 ||
4695 Ustrcmp(argv[i], "environment") == 0))
4697 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4701 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4703 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4708 set_process_info("listing config");
4709 exim_exit(readconf_print(US"config", NULL, flag_n)
4710 ? EXIT_SUCCESS : EXIT_FAILURE);
4714 /* Initialise subsystems as required. */
4718 /* Handle a request to deliver one or more messages that are already on the
4719 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4720 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4722 Delivery of specific messages is typically used for a small number when
4723 prodding by hand (when the option forced_delivery will be set) or when
4724 re-execing to regain root privilege. Each message delivery must happen in a
4725 separate process, so we fork a process for each one, and run them sequentially
4726 so that debugging output doesn't get intertwined, and to avoid spawning too
4727 many processes if a long list is given. However, don't fork for the last one;
4728 this saves a process in the common case when Exim is called to deliver just one
4731 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4733 if (prod_requires_admin && !f.admin_user)
4735 fprintf(stderr, "exim: Permission denied\n");
4736 exim_exit(EXIT_FAILURE);
4738 set_process_info("delivering specified messages");
4739 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4740 for (i = msg_action_arg; i < argc; i++)
4744 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4745 that runs into a later copy into the untainted global message_id[] */
4746 /*XXX Do we need a length limit check here? */
4748 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4749 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4751 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4752 exim_underbar_exit(EXIT_SUCCESS);
4756 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4758 exim_exit(EXIT_FAILURE);
4762 exim_exit(EXIT_SUCCESS);
4766 /* If only a single queue run is requested, without SMTP listening, we can just
4767 turn into a queue runner, with an optional starting message id. */
4769 if (queue_interval == 0 && !f.daemon_listen)
4771 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4772 start_queue_run_id ? US" starting at " : US"",
4773 start_queue_run_id ? start_queue_run_id: US"",
4774 stop_queue_run_id ? US" stopping at " : US"",
4775 stop_queue_run_id ? stop_queue_run_id : US"");
4777 set_process_info("running the '%s' queue (single queue run)", queue_name);
4779 set_process_info("running the queue (single queue run)");
4780 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4781 exim_exit(EXIT_SUCCESS);
4785 /* Find the login name of the real user running this process. This is always
4786 needed when receiving a message, because it is written into the spool file. It
4787 may also be used to construct a from: or a sender: header, and in this case we
4788 need the user's full name as well, so save a copy of it, checked for RFC822
4789 syntax and munged if necessary, if it hasn't previously been set by the -F
4790 argument. We may try to get the passwd entry more than once, in case NIS or
4791 other delays are in evidence. Save the home directory for use in filter testing
4796 if ((pw = getpwuid(real_uid)) != NULL)
4798 originator_login = string_copy(US pw->pw_name);
4799 originator_home = string_copy(US pw->pw_dir);
4801 /* If user name has not been set by -F, set it from the passwd entry
4802 unless -f has been used to set the sender address by a trusted user. */
4804 if (!originator_name)
4806 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4808 uschar *name = US pw->pw_gecos;
4809 uschar *amp = Ustrchr(name, '&');
4812 /* Most Unix specify that a '&' character in the gecos field is
4813 replaced by a copy of the login name, and some even specify that
4814 the first character should be upper cased, so that's what we do. */
4819 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4820 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4821 buffer[loffset] = toupper(buffer[loffset]);
4825 /* If a pattern for matching the gecos field was supplied, apply
4826 it and then expand the name string. */
4828 if (gecos_pattern && gecos_name)
4831 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4833 if (regex_match_and_setup(re, name, 0, -1))
4835 uschar *new_name = expand_string(gecos_name);
4839 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4840 "gecos field \"%s\"\n", new_name, name);
4843 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4844 "\"%s\": %s\n", gecos_name, expand_string_message);
4846 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4847 "gecos field \"%s\"\n", gecos_pattern, name);
4848 store_free((void *)re);
4850 originator_name = string_copy(name);
4853 /* A trusted caller has used -f but not -F */
4855 else originator_name = US"";
4858 /* Break the retry loop */
4863 if (++i > finduser_retries) break;
4867 /* If we cannot get a user login, log the incident and give up, unless the
4868 configuration specifies something to use. When running in the test harness,
4869 any setting of unknown_login overrides the actual name. */
4871 if (!originator_login || f.running_in_test_harness)
4875 originator_login = expand_string(unknown_login);
4876 if (!originator_name && unknown_username)
4877 originator_name = expand_string(unknown_username);
4878 if (!originator_name) originator_name = US"";
4880 if (!originator_login)
4881 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4885 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4888 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4890 /* If a message is created by this call of Exim, the uid/gid of its originator
4891 are those of the caller. These values are overridden if an existing message is
4892 read in from the spool. */
4894 originator_uid = real_uid;
4895 originator_gid = real_gid;
4897 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4898 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4900 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4901 returns. We leave this till here so that the originator_ fields are available
4902 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4905 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4909 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4910 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4911 "mua_wrapper is set");
4914 # ifndef DISABLE_TLS
4915 /* This also checks that the library linkage is working and we can call
4916 routines in it, so call even if tls_require_ciphers is unset */
4918 # ifdef MEASURE_TIMING
4919 struct timeval t0, diff;
4920 (void)gettimeofday(&t0, NULL);
4922 if (!tls_dropprivs_validate_require_cipher(FALSE))
4924 # ifdef MEASURE_TIMING
4925 report_time_since(&t0, US"validate_ciphers (delta)");
4933 /* If the sender ident has not been set (by a trusted caller) set it to
4934 the caller. This will get overwritten below for an inetd call. If a trusted
4935 caller has set it empty, unset it. */
4937 if (!sender_ident) sender_ident = originator_login;
4938 else if (!*sender_ident) sender_ident = NULL;
4940 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4941 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4942 originator_* variables set. */
4944 if (test_rewrite_arg >= 0)
4946 f.really_exim = FALSE;
4947 if (test_rewrite_arg >= argc)
4949 printf("-brw needs an address argument\n");
4950 exim_exit(EXIT_FAILURE);
4952 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
4953 exim_exit(EXIT_SUCCESS);
4956 /* A locally-supplied message is considered to be coming from a local user
4957 unless a trusted caller supplies a sender address with -f, or is passing in the
4958 message via SMTP (inetd invocation or otherwise). */
4960 if ( !sender_address && !smtp_input
4961 || !f.trusted_caller && filter_test == FTEST_NONE)
4963 f.sender_local = TRUE;
4965 /* A trusted caller can supply authenticated_sender and authenticated_id
4966 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4967 defaults except when host checking. */
4969 if (!authenticated_sender && !host_checking)
4970 authenticated_sender = string_sprintf("%s@%s", originator_login,
4971 qualify_domain_sender);
4972 if (!authenticated_id && !host_checking)
4973 authenticated_id = originator_login;
4976 /* Trusted callers are always permitted to specify the sender address.
4977 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4978 is specified is the empty address. However, if a trusted caller does not
4979 specify a sender address for SMTP input, we leave sender_address unset. This
4980 causes the MAIL commands to be honoured. */
4982 if ( !smtp_input && !sender_address
4983 || !receive_check_set_sender(sender_address))
4985 /* Either the caller is not permitted to set a general sender, or this is
4986 non-SMTP input and the trusted caller has not set a sender. If there is no
4987 sender, or if a sender other than <> is set, override with the originator's
4988 login (which will get qualified below), except when checking things. */
4990 if ( !sender_address /* No sender_address set */
4992 (sender_address[0] != 0 && /* Non-empty sender address, AND */
4993 !checking)) /* Not running tests, including filter tests */
4995 sender_address = originator_login;
4996 f.sender_address_forced = FALSE;
4997 sender_address_domain = 0;
5001 /* Remember whether an untrusted caller set the sender address */
5003 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5005 /* Ensure that the sender address is fully qualified unless it is the empty
5006 address, which indicates an error message, or doesn't exist (root caller, smtp
5007 interface, no -f argument). */
5009 if (sender_address && *sender_address && sender_address_domain == 0)
5010 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5011 qualify_domain_sender);
5013 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5015 /* Handle a request to verify a list of addresses, or test them for delivery.
5016 This must follow the setting of the sender address, since routers can be
5017 predicated upon the sender. If no arguments are given, read addresses from
5018 stdin. Set debug_level to at least D_v to get full output for address testing.
5021 if (verify_address_mode || f.address_test_mode)
5024 int flags = vopt_qualify;
5026 if (verify_address_mode)
5028 if (!verify_as_sender) flags |= vopt_is_recipient;
5029 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5034 flags |= vopt_is_recipient;
5035 debug_selector |= D_v;
5036 debug_file = stderr;
5037 debug_fd = fileno(debug_file);
5038 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5041 if (recipients_arg < argc)
5042 while (recipients_arg < argc)
5044 /* Supplied addresses are tainted since they come from a user */
5045 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5048 BOOL finished = FALSE;
5049 uschar *ss = parse_find_address_end(s, FALSE);
5050 if (*ss == ',') *ss = 0; else finished = TRUE;
5051 test_address(s, flags, &exit_value);
5054 while (*++s == ',' || isspace(*s)) ;
5060 uschar * s = get_stdinput(NULL, NULL);
5062 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5066 exim_exit(exit_value);
5069 /* Handle expansion checking. Either expand items on the command line, or read
5070 from stdin if there aren't any. If -Mset was specified, load the message so
5071 that its variables can be used, but restrict this facility to admin users.
5072 Otherwise, if -bem was used, read a message from stdin. */
5076 dns_init(FALSE, FALSE, FALSE);
5077 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5081 exim_fail("exim: permission denied\n");
5082 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5083 /* Checking the length of the ID is sufficient to validate it.
5084 Get an untainted version so file opens can be done. */
5085 message_id = string_copy_taint(message_id, FALSE);
5087 spoolname = string_sprintf("%s-H", message_id);
5088 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5089 printf ("Failed to load message datafile %s\n", message_id);
5090 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5091 printf ("Failed to load message %s\n", message_id);
5094 /* Read a test message from a file. We fudge it up to be on stdin, saving
5095 stdin itself for later reading of expansion strings. */
5097 else if (expansion_test_message)
5099 int save_stdin = dup(0);
5100 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5102 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5105 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5106 message_ended = END_NOTENDED;
5107 read_message_body(receive_msg(extract_recipients));
5108 message_linecount += body_linecount;
5109 (void)dup2(save_stdin, 0);
5110 (void)close(save_stdin);
5111 clearerr(stdin); /* Required by Darwin */
5114 /* Only admin users may see config-file macros this way */
5116 if (!f.admin_user) macros_user = macros = mlast = NULL;
5118 /* Allow $recipients for this testing */
5120 f.enable_dollar_recipients = TRUE;
5122 /* Expand command line items */
5124 if (recipients_arg < argc)
5125 while (recipients_arg < argc)
5126 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5132 char *(*fn_readline)(const char *) = NULL;
5133 void (*fn_addhist)(const char *) = NULL;
5137 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5140 while (s = get_stdinput(fn_readline, fn_addhist))
5141 expansion_test_line(s);
5144 if (dlhandle) dlclose(dlhandle);
5148 /* The data file will be open after -Mset */
5150 if (deliver_datafile >= 0)
5152 (void)close(deliver_datafile);
5153 deliver_datafile = -1;
5156 exim_exit(EXIT_SUCCESS);
5160 /* The active host name is normally the primary host name, but it can be varied
5161 for hosts that want to play several parts at once. We need to ensure that it is
5162 set for host checking, and for receiving messages. */
5164 smtp_active_hostname = primary_hostname;
5165 if (raw_active_hostname != NULL)
5167 uschar *nah = expand_string(raw_active_hostname);
5170 if (!f.expand_string_forcedfail)
5171 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5172 "(smtp_active_hostname): %s", raw_active_hostname,
5173 expand_string_message);
5175 else if (nah[0] != 0) smtp_active_hostname = nah;
5178 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5179 given IP address so that the blocking and relay configuration can be tested.
5180 Unless a sender_ident was set by -oMt, we discard it (the default is the
5181 caller's login name). An RFC 1413 call is made only if we are running in the
5182 test harness and an incoming interface and both ports are specified, because
5183 there is no TCP/IP call to find the ident for. */
5190 if (!sender_ident_set)
5192 sender_ident = NULL;
5193 if (f.running_in_test_harness && sender_host_port
5194 && interface_address && interface_port)
5195 verify_get_ident(1223); /* note hardwired port number */
5198 /* In case the given address is a non-canonical IPv6 address, canonicalize
5199 it. The code works for both IPv4 and IPv6, as it happens. */
5201 size = host_aton(sender_host_address, x);
5202 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5203 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5205 /* Now set up for testing */
5207 host_build_sender_fullhost();
5211 f.sender_local = FALSE;
5212 f.sender_host_notsocket = TRUE;
5213 debug_file = stderr;
5214 debug_fd = fileno(debug_file);
5215 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5216 "**** but without any ident (RFC 1413) callback.\n"
5217 "**** This is not for real!\n\n",
5218 sender_host_address);
5220 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5221 if (verify_check_host(&hosts_connection_nolog) == OK)
5222 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5223 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5225 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5226 because a log line has already been written for all its failure exists
5227 (usually "connection refused: <reason>") and writing another one is
5228 unnecessary clutter. */
5230 if (smtp_start_session())
5233 for (; (reset_point = store_mark()); store_reset(reset_point))
5235 if (smtp_setup_msg() <= 0) break;
5236 if (!receive_msg(FALSE)) break;
5238 return_path = sender_address = NULL;
5239 dnslist_domain = dnslist_matched = NULL;
5240 #ifndef DISABLE_DKIM
5241 dkim_cur_signer = NULL;
5244 deliver_localpart_orig = NULL;
5245 deliver_domain_orig = NULL;
5246 callout_address = sending_ip_address = NULL;
5247 deliver_localpart_data = deliver_domain_data =
5248 recipient_data = sender_data = NULL;
5249 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5253 exim_exit(EXIT_SUCCESS);
5257 /* Arrange for message reception if recipients or SMTP were specified;
5258 otherwise complain unless a version print (-bV) happened or this is a filter
5259 verification test or info dump.
5260 In the former case, show the configuration file name. */
5262 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5264 if (version_printed)
5266 if (Ustrchr(config_main_filelist, ':'))
5267 printf("Configuration file search path is %s\n", config_main_filelist);
5268 printf("Configuration file is %s\n", config_main_filename);
5269 return EXIT_SUCCESS;
5272 if (info_flag != CMDINFO_NONE)
5274 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5275 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5278 if (filter_test == FTEST_NONE)
5279 exim_usage(called_as);
5283 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5284 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5285 that we are not called from inetd, because that is rejected above. The
5286 following configuration settings are forced here:
5288 (1) Synchronous delivery (-odi)
5289 (2) Errors to stderr (-oep == -oeq)
5290 (3) No parallel remote delivery
5291 (4) Unprivileged delivery
5293 We don't force overall queueing options because there are several of them;
5294 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5295 to override any SMTP queueing. */
5299 f.synchronous_delivery = TRUE;
5300 arg_error_handling = ERRORS_STDERR;
5301 remote_max_parallel = 1;
5302 deliver_drop_privilege = TRUE;
5303 f.queue_smtp = FALSE;
5304 queue_smtp_domains = NULL;
5306 message_utf8_downconvert = -1; /* convert-if-needed */
5311 /* Prepare to accept one or more new messages on the standard input. When a
5312 message has been read, its id is returned in message_id[]. If doing immediate
5313 delivery, we fork a delivery process for each received message, except for the
5314 last one, where we can save a process switch.
5316 It is only in non-smtp mode that error_handling is allowed to be changed from
5317 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5318 sendmail error modes other than -oem ever actually used? Later: yes.) */
5320 if (!smtp_input) error_handling = arg_error_handling;
5322 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5323 logging being sent down the socket and make an identd call to get the
5326 else if (f.is_inetd)
5328 (void)fclose(stderr);
5329 exim_nullstd(); /* Re-open to /dev/null */
5330 verify_get_ident(IDENT_PORT);
5331 host_build_sender_fullhost();
5332 set_process_info("handling incoming connection from %s via inetd",
5336 /* If the sender host address has been set, build sender_fullhost if it hasn't
5337 already been done (which it will have been for inetd). This caters for the
5338 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5339 so that the test for IP options is skipped for -bs input. */
5341 if (sender_host_address && !sender_fullhost)
5343 host_build_sender_fullhost();
5344 set_process_info("handling incoming connection from %s via -oMa",
5346 f.sender_host_notsocket = TRUE;
5349 /* Otherwise, set the sender host as unknown except for inetd calls. This
5350 prevents host checking in the case of -bs not from inetd and also for -bS. */
5352 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5354 /* If stdout does not exist, then dup stdin to stdout. This can happen
5355 if exim is started from inetd. In this case fd 0 will be set to the socket,
5356 but fd 1 will not be set. This also happens for passed SMTP channels. */
5358 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5360 /* Set up the incoming protocol name and the state of the program. Root is
5361 allowed to force received protocol via the -oMr option above. If we have come
5362 via inetd, the process info has already been set up. We don't set
5363 received_protocol here for smtp input, as it varies according to
5364 batch/HELO/EHLO/AUTH/TLS. */
5368 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5369 smtp_batched_input? "batched " : "",
5370 (sender_address!= NULL)? sender_address : originator_login);
5374 int old_pool = store_pool;
5375 store_pool = POOL_PERM;
5376 if (!received_protocol)
5377 received_protocol = string_sprintf("local%s", called_as);
5378 store_pool = old_pool;
5379 set_process_info("accepting a local non-SMTP message from <%s>",
5383 /* Initialize the session_local_queue-only flag (this will be ignored if
5384 mua_wrapper is set) */
5387 session_local_queue_only = queue_only;
5389 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5390 the spool if so configured. On failure, we must not attempt to send an error
5391 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5392 error code is given.) */
5394 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5395 exim_fail("exim: insufficient disk space\n");
5397 /* If this is smtp input of any kind, real or batched, handle the start of the
5400 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5401 because a log line has already been written for all its failure exists
5402 (usually "connection refused: <reason>") and writing another one is
5403 unnecessary clutter. */
5409 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5410 if (verify_check_host(&hosts_connection_nolog) == OK)
5411 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5412 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5413 if (!smtp_start_session())
5416 exim_exit(EXIT_SUCCESS);
5420 /* Otherwise, set up the input size limit here. */
5424 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5425 if (expand_string_message)
5426 if (thismessage_size_limit == -1)
5427 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5428 "message_size_limit: %s", expand_string_message);
5430 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5431 "message_size_limit: %s", expand_string_message);
5434 /* Loop for several messages when reading SMTP input. If we fork any child
5435 processes, we don't want to wait for them unless synchronous delivery is
5436 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5437 same as SIG_DFL, despite the fact that documentation often lists the default as
5438 "ignore". This is a confusing area. This is what I know:
5440 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5441 processes that complete simply to go away without ever becoming defunct. You
5442 can't then wait for them - but we don't want to wait for them in the
5443 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5444 happen for all OS (e.g. *BSD is different).
5446 But that's not the end of the story. Some (many? all?) systems have the
5447 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5448 has by default, so it seems that the difference is merely one of default
5449 (compare restarting vs non-restarting signals).
5451 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5452 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5453 of the loop below. Paranoia rules.
5455 February 2003: That's *still* not the end of the story. There are now versions
5456 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5457 process then calls waitpid(), a grumble is written to the system log, because
5458 this is logically inconsistent. In other words, it doesn't like the paranoia.
5459 As a consequence of this, the waitpid() below is now excluded if we are sure
5460 that SIG_IGN works. */
5462 if (!f.synchronous_delivery)
5465 struct sigaction act;
5466 act.sa_handler = SIG_IGN;
5467 sigemptyset(&(act.sa_mask));
5468 act.sa_flags = SA_NOCLDWAIT;
5469 sigaction(SIGCHLD, &act, NULL);
5471 signal(SIGCHLD, SIG_IGN);
5475 /* Save the current store pool point, for resetting at the start of
5476 each message, and save the real sender address, if any. */
5478 real_sender_address = sender_address;
5480 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5481 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5486 rmark reset_point = store_mark();
5489 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5490 input and build the recipients list, before calling receive_msg() to read the
5491 message proper. Whatever sender address is given in the SMTP transaction is
5492 often ignored for local senders - we use the actual sender, which is normally
5493 either the underlying user running this process or a -f argument provided by
5494 a trusted caller. It is saved in real_sender_address. The test for whether to
5495 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5500 if ((rc = smtp_setup_msg()) > 0)
5502 if (real_sender_address != NULL &&
5503 !receive_check_set_sender(sender_address))
5505 sender_address = raw_sender = real_sender_address;
5506 sender_address_unrewritten = NULL;
5509 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5510 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5511 the very end. The result of the ACL is ignored (as for other non-SMTP
5512 messages). It is run for its potential side effects. */
5514 if (smtp_batched_input && acl_not_smtp_start != NULL)
5516 uschar *user_msg, *log_msg;
5517 f.enable_dollar_recipients = TRUE;
5518 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5519 &user_msg, &log_msg);
5520 f.enable_dollar_recipients = FALSE;
5523 /* Now get the data for the message */
5525 more = receive_msg(extract_recipients);
5526 if (message_id[0] == 0)
5528 cancel_cutthrough_connection(TRUE, US"receive dropped");
5529 if (more) goto moreloop;
5530 smtp_log_no_mail(); /* Log no mail if configured */
5531 exim_exit(EXIT_FAILURE);
5536 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5537 smtp_log_no_mail(); /* Log no mail if configured */
5538 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5542 /* In the non-SMTP case, we have all the information from the command
5543 line, but must process it in case it is in the more general RFC822
5544 format, and in any case, to detect syntax errors. Also, it appears that
5545 the use of comma-separated lists as single arguments is common, so we
5546 had better support them. */
5551 int count = argc - recipients_arg;
5552 uschar **list = argv + recipients_arg;
5554 /* These options cannot be changed dynamically for non-SMTP messages */
5556 f.active_local_sender_retain = local_sender_retain;
5557 f.active_local_from_check = local_from_check;
5559 /* Save before any rewriting */
5561 raw_sender = string_copy(sender_address);
5563 /* Loop for each argument (supplied by user hence tainted) */
5565 for (int i = 0; i < count; i++)
5567 int start, end, domain;
5569 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5570 * We'll still want to cap it to something, just in case. */
5571 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5573 /* Loop for each comma-separated address */
5577 BOOL finished = FALSE;
5579 uschar *ss = parse_find_address_end(s, FALSE);
5581 if (*ss == ',') *ss = 0; else finished = TRUE;
5583 /* Check max recipients - if -t was used, these aren't recipients */
5585 if (recipients_max > 0 && ++rcount > recipients_max &&
5586 !extract_recipients)
5587 if (error_handling == ERRORS_STDERR)
5589 fprintf(stderr, "exim: too many recipients\n");
5590 exim_exit(EXIT_FAILURE);
5594 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5595 errors_sender_rc : EXIT_FAILURE;
5599 BOOL b = allow_utf8_domains;
5600 allow_utf8_domains = TRUE;
5603 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5606 if (string_is_utf8(recipient))
5607 message_smtputf8 = TRUE;
5609 allow_utf8_domains = b;
5612 if (domain == 0 && !f.allow_unqualified_recipient)
5615 errmess = US"unqualified recipient address not allowed";
5619 if (error_handling == ERRORS_STDERR)
5621 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5622 string_printing(list[i]), errmess);
5623 exim_exit(EXIT_FAILURE);
5629 eblock.text1 = string_printing(list[i]);
5630 eblock.text2 = errmess;
5632 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5633 errors_sender_rc : EXIT_FAILURE;
5636 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5639 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5643 /* Show the recipients when debugging */
5647 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5648 if (recipients_list)
5650 debug_printf("Recipients:\n");
5651 for (int i = 0; i < recipients_count; i++)
5652 debug_printf(" %s\n", recipients_list[i].address);
5656 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5657 ignored; rejecting here would just add complication, and it can just as
5658 well be done later. Allow $recipients to be visible in the ACL. */
5660 if (acl_not_smtp_start)
5662 uschar *user_msg, *log_msg;
5663 f.enable_dollar_recipients = TRUE;
5664 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5665 &user_msg, &log_msg);
5666 f.enable_dollar_recipients = FALSE;
5669 /* Pause for a while waiting for input. If none received in that time,
5670 close the logfile, if we had one open; then if we wait for a long-running
5671 datasource (months, in one use-case) log rotation will not leave us holding
5674 if (!receive_timeout)
5676 struct timeval t = { .tv_sec = 30*60, .tv_usec = 0 }; /* 30 minutes */
5679 FD_ZERO(&r); FD_SET(0, &r);
5680 if (select(1, &r, NULL, NULL, &t) == 0) mainlog_close();
5683 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5684 will just read the headers for the message, and not write anything onto the
5687 message_ended = END_NOTENDED;
5688 more = receive_msg(extract_recipients);
5690 /* more is always FALSE here (not SMTP message) when reading a message
5691 for real; when reading the headers of a message for filter testing,
5692 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5694 if (message_id[0] == 0) exim_exit(EXIT_FAILURE);
5695 } /* Non-SMTP message reception */
5697 /* If this is a filter testing run, there are headers in store, but
5698 no message on the spool. Run the filtering code in testing mode, setting
5699 the domain to the qualify domain and the local part to the current user,
5700 unless they have been set by options. The prefix and suffix are left unset
5701 unless specified. The the return path is set to to the sender unless it has
5702 already been set from a return-path header in the message. */
5704 if (filter_test != FTEST_NONE)
5706 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5707 deliver_domain_orig = deliver_domain;
5708 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5709 deliver_localpart_orig = deliver_localpart;
5710 deliver_localpart_prefix = US ftest_prefix;
5711 deliver_localpart_suffix = US ftest_suffix;
5712 deliver_home = originator_home;
5716 printf("Return-path copied from sender\n");
5717 return_path = string_copy(sender_address);
5720 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5721 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5723 receive_add_recipient(
5724 string_sprintf("%s%s%s@%s",
5725 ftest_prefix ? ftest_prefix : US"",
5727 ftest_suffix ? ftest_suffix : US"",
5728 deliver_domain), -1);
5730 printf("Recipient = %s\n", recipients_list[0].address);
5731 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5732 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5734 if (chdir("/")) /* Get away from wherever the user is running this from */
5736 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5737 exim_exit(EXIT_FAILURE);
5740 /* Now we run either a system filter test, or a user filter test, or both.
5741 In the latter case, headers added by the system filter will persist and be
5742 available to the user filter. We need to copy the filter variables
5745 if (filter_test & FTEST_SYSTEM)
5746 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5747 exim_exit(EXIT_FAILURE);
5749 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5751 if (filter_test & FTEST_USER)
5752 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5753 exim_exit(EXIT_FAILURE);
5755 exim_exit(EXIT_SUCCESS);
5758 /* Else act on the result of message reception. We should not get here unless
5759 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5760 will be TRUE. If it is not, check on the number of messages received in this
5763 if ( !session_local_queue_only
5764 && smtp_accept_queue_per_connection > 0
5765 && receive_messagecount > smtp_accept_queue_per_connection)
5767 session_local_queue_only = TRUE;
5768 queue_only_reason = 2;
5771 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5772 and queue_only_load is set, check that the load average is below it. If it is
5773 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5774 default), we put the whole session into queue_only mode. It then remains this
5775 way for any subsequent messages on the same SMTP connection. This is a
5776 deliberate choice; even though the load average may fall, it doesn't seem
5777 right to deliver later messages on the same call when not delivering earlier
5778 ones. However, there are odd cases where this is not wanted, so this can be
5779 changed by setting queue_only_load_latch false. */
5781 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5782 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5784 queue_only_reason = 3;
5785 if (queue_only_load_latch) session_local_queue_only = TRUE;
5788 /* If running as an MUA wrapper, all queueing options and freezing options
5792 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5794 /* Log the queueing here, when it will get a message id attached, but
5795 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5798 if (local_queue_only)
5800 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5801 switch(queue_only_reason)
5804 log_write(L_delay_delivery,
5805 LOG_MAIN, "no immediate delivery: more than %d messages "
5806 "received in one connection", smtp_accept_queue_per_connection);
5810 log_write(L_delay_delivery,
5811 LOG_MAIN, "no immediate delivery: load average %.2f",
5812 (double)load_average/1000.0);
5817 else if (f.queue_only_policy || f.deliver_freeze)
5818 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5820 /* Else do the delivery unless the ACL or local_scan() called for queue only
5821 or froze the message. Always deliver in a separate process. A fork failure is
5822 not a disaster, as the delivery will eventually happen on a subsequent queue
5823 run. The search cache must be tidied before the fork, as the parent will
5824 do it before exiting. The child will trigger a lookup failure and
5825 thereby defer the delivery if it tries to use (for example) a cached ldap
5826 connection that the parent has called unbind on. */
5833 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5836 close_unwanted(); /* Close unwanted file descriptors and TLS */
5837 exim_nullstd(); /* Ensure std{in,out,err} exist */
5839 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5840 mode, deliver_drop_privilege is forced TRUE). */
5842 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5844 delivery_re_exec(CEE_EXEC_EXIT);
5845 /* Control does not return here. */
5848 /* No need to re-exec */
5850 rc = deliver_message(message_id, FALSE, FALSE);
5852 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5853 ? EXIT_SUCCESS : EXIT_FAILURE);
5858 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5859 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5860 "process: %s", strerror(errno));
5864 release_cutthrough_connection(US"msg passed for delivery");
5866 /* In the parent, wait if synchronous delivery is required. This will
5867 always be the case in MUA wrapper mode. */
5869 if (f.synchronous_delivery)
5872 while (wait(&status) != pid);
5873 if ((status & 0x00ff) != 0)
5874 log_write(0, LOG_MAIN|LOG_PANIC,
5875 "process %d crashed with signal %d while delivering %s",
5876 (int)pid, status & 0x00ff, message_id);
5877 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5882 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5883 automatically reaps children (see comments above the loop), clear away any
5884 finished subprocesses here, in case there are lots of messages coming in
5885 from the same source. */
5887 #ifndef SIG_IGN_WORKS
5888 while (waitpid(-1, NULL, WNOHANG) > 0);
5892 return_path = sender_address = NULL;
5893 authenticated_sender = NULL;
5894 deliver_localpart_orig = NULL;
5895 deliver_domain_orig = NULL;
5896 deliver_host = deliver_host_address = NULL;
5897 dnslist_domain = dnslist_matched = NULL;
5898 #ifdef WITH_CONTENT_SCAN
5899 malware_name = NULL;
5901 callout_address = NULL;
5902 sending_ip_address = NULL;
5903 deliver_localpart_data = deliver_domain_data =
5904 recipient_data = sender_data = NULL;
5906 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5908 store_reset(reset_point);
5911 exim_exit(EXIT_SUCCESS); /* Never returns */
5912 return 0; /* To stop compiler warning */