1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* Copyright (c) The Exim Maintainers 2020 - 2021 */
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. */
46 function_store_malloc(PCRE2_SIZE size, void * tag)
48 return store_malloc((int)size);
52 function_store_free(void * block, void * tag)
54 /* At least some version of pcre2 pass a null pointer */
55 if (block) store_free(block);
61 /*************************************************
62 * Enums for cmdline interface *
63 *************************************************/
65 enum commandline_info { CMDINFO_NONE=0,
66 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
71 /*************************************************
72 * Compile regular expression and panic on fail *
73 *************************************************/
75 /* This function is called when failure to compile a regular expression leads
76 to a panic exit. In other cases, pcre_compile() is called directly. In many
77 cases where this function is used, the results of the compilation are to be
78 placed in long-lived store, so we temporarily reset the store management
79 functions that PCRE uses if the use_malloc flag is set.
82 pattern the pattern to compile
83 caseless TRUE if caseless matching is required
84 use_malloc TRUE if compile into malloc store
86 Returns: pointer to the compiled pattern
90 regex_must_compile(const uschar * pattern, BOOL caseless, BOOL use_malloc)
93 int options = caseless ? PCRE_COPT|PCRE2_CASELESS : PCRE_COPT;
94 const pcre2_code * yield;
96 pcre2_general_context * gctx;
97 pcre2_compile_context * cctx;
101 gctx = pcre2_general_context_create(function_store_malloc, function_store_free, NULL);
102 cctx = pcre2_compile_context_create(gctx);
107 if (!(yield = pcre2_compile((PCRE2_SPTR)pattern, PCRE2_ZERO_TERMINATED, options,
108 &err, &offset, cctx)))
111 pcre2_get_error_message(err, errbuf, sizeof(errbuf));
112 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
113 "%s at offset %ld while compiling %s", errbuf, (long)offset, pattern);
118 pcre2_compile_context_free(cctx);
119 pcre2_general_context_free(gctx);
128 pcre_gen_ctx = pcre2_general_context_create(function_store_malloc, function_store_free, NULL);
129 pcre_cmp_ctx = pcre2_compile_context_create(pcre_gen_ctx);
130 pcre_mtc_ctx = pcre2_match_context_create(pcre_gen_ctx);
136 /*************************************************
137 * Execute regular expression and set strings *
138 *************************************************/
140 /* This function runs a regular expression match, and sets up the pointers to
141 the matched substrings. The matched strings are copied so the lifetime of
142 the subject is not a problem.
145 re the compiled expression
146 subject the subject string
147 options additional PCRE options
148 setup if < 0 do full setup
149 if >= 0 setup from setup+1 onwards,
150 excluding the full matched string
152 Returns: TRUE if matched, or FALSE
156 regex_match_and_setup(const pcre2_code * re, const uschar * subject, int options, int setup)
158 pcre2_match_data * md = pcre2_match_data_create_from_pattern(re, pcre_gen_ctx);
159 int res = pcre2_match(re, (PCRE2_SPTR)subject, PCRE2_ZERO_TERMINATED, 0,
160 PCRE_EOPT | options, md, pcre_mtc_ctx);
163 if ((yield = (res >= 0)))
165 res = pcre2_get_ovector_count(md);
166 expand_nmax = setup < 0 ? 0 : setup + 1;
167 for (int matchnum = setup < 0 ? 0 : 1; matchnum < res; matchnum++)
170 pcre2_substring_get_bynumber(md, matchnum,
171 (PCRE2_UCHAR **)&expand_nstring[expand_nmax], &len);
172 expand_nlength[expand_nmax++] = (int)len;
176 else if (res != PCRE2_ERROR_NOMATCH) DEBUG(D_any)
179 pcre2_get_error_message(res, errbuf, sizeof(errbuf));
180 debug_printf_indent("pcre2: %s\n", errbuf);
182 pcre2_match_data_free(md);
187 /* Check just for match with regex. Uses the common memory-handling.
191 subject string to be checked
192 slen length of subject; -1 for nul-terminated
193 rptr pointer for matched string, copied, or NULL
195 Return: TRUE for a match.
199 regex_match(const pcre2_code * re, const uschar * subject, int slen, uschar ** rptr)
201 pcre2_match_data * md = pcre2_match_data_create(1, pcre_gen_ctx);
202 int rc = pcre2_match(re, (PCRE2_SPTR)subject,
203 slen >= 0 ? slen : PCRE2_ZERO_TERMINATED,
204 0, PCRE_EOPT, md, pcre_mtc_ctx);
205 PCRE2_SIZE * ovec = pcre2_get_ovector_pointer(md);
209 *rptr = string_copyn(subject + ovec[0], ovec[1] - ovec[0]);
215 /*************************************************
216 * Set up processing details *
217 *************************************************/
219 /* Save a text string for dumping when SIGUSR1 is received.
220 Do checks for overruns.
222 Arguments: format and arguments, as for printf()
227 set_process_info(const char *format, ...)
229 gstring gs = { .size = PROCESS_INFO_SIZE - 2, .ptr = 0, .s = process_info };
234 g = string_fmt_append(&gs, "%5d ", (int)getpid());
236 va_start(ap, format);
237 if (!string_vformat(g, 0, format, ap))
240 g = string_cat(&gs, US"**** string overflowed buffer ****");
242 g = string_catn(g, US"\n", 1);
243 string_from_gstring(g);
244 process_info_len = g->ptr;
245 DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
249 /***********************************************
250 * Handler for SIGTERM *
251 ***********************************************/
254 term_handler(int sig)
260 /***********************************************
261 * Handler for SIGSEGV *
262 ***********************************************/
266 segv_handler(int sig, siginfo_t * info, void * uctx)
268 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (fault address: %p)", info->si_addr);
269 switch (info->si_code)
271 case SEGV_MAPERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_MAPERR"); break;
272 case SEGV_ACCERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_ACCERR"); break;
273 case SEGV_BNDERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_BNDERR"); break;
274 case SEGV_PKUERR: log_write(0, LOG_MAIN|LOG_PANIC, "SEGV_PKUERR"); break;
276 if (US info->si_addr < US 4096)
277 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (null pointer indirection)");
279 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
280 signal(SIGSEGV, SIG_DFL);
285 segv_handler(int sig)
287 log_write(0, LOG_MAIN|LOG_PANIC, "SIGSEGV (maybe attempt to write to immutable memory)");
288 signal(SIGSEGV, SIG_DFL);
294 /*************************************************
295 * Handler for SIGUSR1 *
296 *************************************************/
298 /* SIGUSR1 causes any exim process to write to the process log details of
299 what it is currently doing. It will only be used if the OS is capable of
300 setting up a handler that causes automatic restarting of any system call
301 that is in progress at the time.
303 This function takes care to be signal-safe.
305 Argument: the signal number (SIGUSR1)
310 usr1_handler(int sig)
314 os_restarting_signal(sig, usr1_handler);
316 if (!process_log_path) return;
317 fd = log_open_as_exim(process_log_path);
319 /* If we are neither exim nor root, or if we failed to create the log file,
320 give up. There is not much useful we can do with errors, since we don't want
321 to disrupt whatever is going on outside the signal handler. */
325 (void)write(fd, process_info, process_info_len);
331 /*************************************************
333 *************************************************/
335 /* This handler is enabled most of the time that Exim is running. The handler
336 doesn't actually get used unless alarm() has been called to set a timer, to
337 place a time limit on a system call of some kind. When the handler is run, it
340 There are some other SIGALRM handlers that are used in special cases when more
341 than just a flag setting is required; for example, when reading a message's
342 input. These are normally set up in the code module that uses them, and the
343 SIGALRM handler is reset to this one afterwards.
345 Argument: the signal value (SIGALRM)
350 sigalrm_handler(int sig)
353 os_non_restarting_signal(SIGALRM, sigalrm_handler);
358 /*************************************************
359 * Sleep for a fractional time interval *
360 *************************************************/
362 /* This function is called by millisleep() and exim_wait_tick() to wait for a
363 period of time that may include a fraction of a second. The coding is somewhat
364 tedious. We do not expect setitimer() ever to fail, but if it does, the process
365 will wait for ever, so we panic in this instance. (There was a case of this
366 when a bug in a function that calls milliwait() caused it to pass invalid data.
367 That's when I added the check. :-)
369 We assume it to be not worth sleeping for under 50us; this value will
370 require revisiting as hardware advances. This avoids the issue of
371 a zero-valued timer setting meaning "never fire".
373 Argument: an itimerval structure containing the interval
378 milliwait(struct itimerval *itval)
381 sigset_t old_sigmask;
382 int save_errno = errno;
384 if (itval->it_value.tv_usec < 50 && itval->it_value.tv_sec == 0)
386 (void)sigemptyset(&sigmask); /* Empty mask */
387 (void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
388 (void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
389 if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
390 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
391 "setitimer() failed: %s", strerror(errno));
392 (void)sigfillset(&sigmask); /* All signals */
393 (void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
394 (void)sigsuspend(&sigmask); /* Until SIGALRM */
395 (void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
397 sigalrm_seen = FALSE;
403 /*************************************************
404 * Millisecond sleep function *
405 *************************************************/
407 /* The basic sleep() function has a granularity of 1 second, which is too rough
408 in some cases - for example, when using an increasing delay to slow down
411 Argument: number of millseconds
418 struct itimerval itval = {.it_interval = {.tv_sec = 0, .tv_usec = 0},
419 .it_value = {.tv_sec = msec/1000,
420 .tv_usec = (msec % 1000) * 1000}};
426 /*************************************************
427 * Compare microsecond times *
428 *************************************************/
435 Returns: -1, 0, or +1
439 exim_tvcmp(struct timeval *t1, struct timeval *t2)
441 if (t1->tv_sec > t2->tv_sec) return +1;
442 if (t1->tv_sec < t2->tv_sec) return -1;
443 if (t1->tv_usec > t2->tv_usec) return +1;
444 if (t1->tv_usec < t2->tv_usec) return -1;
451 /*************************************************
452 * Clock tick wait function *
453 *************************************************/
455 #ifdef _POSIX_MONOTONIC_CLOCK
456 # ifdef CLOCK_BOOTTIME
457 # define EXIM_CLOCKTYPE CLOCK_BOOTTIME
459 # define EXIM_CLOCKTYPE CLOCK_MONOTONIC
462 /* Amount EXIM_CLOCK is behind realtime, at startup. */
463 static struct timespec offset_ts;
466 exim_clock_init(void)
469 if (clock_gettime(EXIM_CLOCKTYPE, &offset_ts) != 0) return;
470 (void)gettimeofday(&tv, NULL);
471 offset_ts.tv_sec = tv.tv_sec - offset_ts.tv_sec;
472 offset_ts.tv_nsec = tv.tv_usec * 1000 - offset_ts.tv_nsec;
473 if (offset_ts.tv_nsec >= 0) return;
475 offset_ts.tv_nsec += 1000*1000*1000;
481 exim_gettime(struct timeval * tv)
483 #ifdef _POSIX_MONOTONIC_CLOCK
484 struct timespec now_ts;
486 if (clock_gettime(EXIM_CLOCKTYPE, &now_ts) == 0)
488 now_ts.tv_sec += offset_ts.tv_sec;
489 if ((now_ts.tv_nsec += offset_ts.tv_nsec) >= 1000*1000*1000)
492 now_ts.tv_nsec -= 1000*1000*1000;
494 tv->tv_sec = now_ts.tv_sec;
495 tv->tv_usec = now_ts.tv_nsec / 1000;
499 (void)gettimeofday(tv, NULL);
503 /* Exim uses a time + a pid to generate a unique identifier in two places: its
504 message IDs, and in file names for maildir deliveries. Because some OS now
505 re-use pids within the same second, sub-second times are now being used.
506 However, for absolute certainty, we must ensure the clock has ticked before
507 allowing the relevant process to complete. At the time of implementation of
508 this code (February 2003), the speed of processors is such that the clock will
509 invariably have ticked already by the time a process has done its job. This
510 function prepares for the time when things are faster - and it also copes with
511 clocks that go backwards.
514 prev_tv A timeval which was used to create uniqueness; its usec field
515 has been rounded down to the value of the resolution.
516 We want to be sure the current time is greater than this.
517 On return, updated to current (rounded down).
518 resolution The resolution that was used to divide the microseconds
519 (1 for maildir, larger for message ids)
525 exim_wait_tick(struct timeval * prev_tv, int resolution)
527 struct timeval now_tv;
528 long int now_true_usec;
530 exim_gettime(&now_tv);
531 now_true_usec = now_tv.tv_usec;
532 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
534 while (exim_tvcmp(&now_tv, prev_tv) <= 0)
536 struct itimerval itval;
537 itval.it_interval.tv_sec = 0;
538 itval.it_interval.tv_usec = 0;
539 itval.it_value.tv_sec = prev_tv->tv_sec - now_tv.tv_sec;
540 itval.it_value.tv_usec = prev_tv->tv_usec + resolution - now_true_usec;
542 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
543 negative value for the microseconds is possible only in the case when "now"
544 is more than a second less than "tgt". That means that itval.it_value.tv_sec
545 is greater than zero. The following correction is therefore safe. */
547 if (itval.it_value.tv_usec < 0)
549 itval.it_value.tv_usec += 1000000;
550 itval.it_value.tv_sec -= 1;
553 DEBUG(D_transport|D_receive)
555 if (!f.running_in_test_harness)
557 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
558 prev_tv->tv_sec, (long) prev_tv->tv_usec,
559 now_tv.tv_sec, (long) now_tv.tv_usec);
560 debug_printf("waiting " TIME_T_FMT ".%06lu sec\n",
561 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
567 /* Be prapared to go around if the kernel does not implement subtick
568 granularity (GNU Hurd) */
570 exim_gettime(&now_tv);
571 now_true_usec = now_tv.tv_usec;
572 now_tv.tv_usec = (now_true_usec/resolution) * resolution;
580 /*************************************************
581 * Call fopen() with umask 777 and adjust mode *
582 *************************************************/
584 /* Exim runs with umask(0) so that files created with open() have the mode that
585 is specified in the open() call. However, there are some files, typically in
586 the spool directory, that are created with fopen(). They end up world-writeable
587 if no precautions are taken. Although the spool directory is not accessible to
588 the world, this is an untidiness. So this is a wrapper function for fopen()
589 that sorts out the mode of the created file.
592 filename the file name
593 options the fopen() options
594 mode the required mode
596 Returns: the fopened FILE or NULL
600 modefopen(const uschar *filename, const char *options, mode_t mode)
602 mode_t saved_umask = umask(0777);
603 FILE *f = Ufopen(filename, options);
604 (void)umask(saved_umask);
605 if (f != NULL) (void)fchmod(fileno(f), mode);
610 /*************************************************
611 * Ensure stdin, stdout, and stderr exist *
612 *************************************************/
614 /* Some operating systems grumble if an exec() happens without a standard
615 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
616 file will be opened and will use these fd values, and then some other bit of
617 code will assume, for example, that it can write error messages to stderr.
618 This function ensures that fds 0, 1, and 2 are open if they do not already
619 exist, by connecting them to /dev/null.
621 This function is also used to ensure that std{in,out,err} exist at all times,
622 so that if any library that Exim calls tries to use them, it doesn't crash.
633 for (int i = 0; i <= 2; i++)
635 if (fstat(i, &statbuf) < 0 && errno == EBADF)
637 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
638 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
639 string_open_failed("/dev/null", NULL));
640 if (devnull != i) (void)dup2(devnull, i);
643 if (devnull > 2) (void)close(devnull);
649 /*************************************************
650 * Close unwanted file descriptors for delivery *
651 *************************************************/
653 /* This function is called from a new process that has been forked to deliver
654 an incoming message, either directly, or using exec.
656 We want any smtp input streams to be closed in this new process. However, it
657 has been observed that using fclose() here causes trouble. When reading in -bS
658 input, duplicate copies of messages have been seen. The files will be sharing a
659 file pointer with the parent process, and it seems that fclose() (at least on
660 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
661 least sometimes. Hence we go for closing the underlying file descriptors.
663 If TLS is active, we want to shut down the TLS library, but without molesting
664 the parent's SSL connection.
666 For delivery of a non-SMTP message, we want to close stdin and stdout (and
667 stderr unless debugging) because the calling process might have set them up as
668 pipes and be waiting for them to close before it waits for the submission
669 process to terminate. If they aren't closed, they hold up the calling process
670 until the initial delivery process finishes, which is not what we want.
672 Exception: We do want it for synchronous delivery!
674 And notwithstanding all the above, if D_resolver is set, implying resolver
675 debugging, leave stdout open, because that's where the resolver writes its
678 When we close stderr (which implies we've also closed stdout), we also get rid
679 of any controlling terminal.
691 tls_close(NULL, TLS_NO_SHUTDOWN); /* Shut down the TLS library */
693 (void)close(fileno(smtp_in));
694 (void)close(fileno(smtp_out));
699 (void)close(0); /* stdin */
700 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
701 if (debug_selector == 0) /* stderr */
703 if (!f.synchronous_delivery)
716 /*************************************************
718 *************************************************/
720 /* This function sets a new uid and gid permanently, optionally calling
721 initgroups() to set auxiliary groups. There are some special cases when running
722 Exim in unprivileged modes. In these situations the effective uid will not be
723 root; if we already have the right effective uid/gid, and don't need to
724 initialize any groups, leave things as they are.
729 igflag TRUE if initgroups() wanted
730 msg text to use in debugging output and failure log
732 Returns: nothing; bombs out on failure
736 exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
738 uid_t euid = geteuid();
739 gid_t egid = getegid();
741 if (euid == root_uid || euid != uid || egid != gid || igflag)
743 /* At least one OS returns +1 for initgroups failure, so just check for
748 struct passwd *pw = getpwuid(uid);
750 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
751 "no passwd entry for uid=%ld", (long int)uid);
753 if (initgroups(pw->pw_name, gid) != 0)
754 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
755 (long int)uid, strerror(errno));
758 if (setgid(gid) < 0 || setuid(uid) < 0)
759 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
760 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
763 /* Debugging output included uid/gid and all groups */
767 int group_count, save_errno;
768 gid_t group_list[EXIM_GROUPLIST_SIZE];
769 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
770 (long int)geteuid(), (long int)getegid(), (long int)getpid());
771 group_count = getgroups(nelem(group_list), group_list);
773 debug_printf(" auxiliary group list:");
775 for (int i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
776 else if (group_count < 0)
777 debug_printf(" <error: %s>", strerror(save_errno));
778 else debug_printf(" <none>");
786 /*************************************************
788 *************************************************/
790 /* Exim exits via this function so that it always clears up any open
796 Returns: does not return
805 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
806 ">>>>>>>>>>>>>>>>\n",
807 (int)getpid(), process_purpose, rc);
813 exim_underbar_exit(int rc)
817 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d (%s) terminating with rc=%d "
818 ">>>>>>>>>>>>>>>>\n",
819 (int)getpid(), process_purpose, rc);
825 /* Print error string, then die */
827 exim_fail(const char * fmt, ...)
831 vfprintf(stderr, fmt, ap);
835 /* fail if a length is too long */
837 exim_len_fail_toolong(int itemlen, int maxlen, const char *description)
839 if (itemlen <= maxlen)
841 fprintf(stderr, "exim: length limit exceeded (%d > %d) for: %s\n",
842 itemlen, maxlen, description);
846 /* only pass through the string item back to the caller if it's short enough */
847 static inline const uschar *
848 exim_str_fail_toolong(const uschar *item, int maxlen, const char *description)
850 exim_len_fail_toolong(Ustrlen(item), maxlen, description);
854 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
855 of chown()/fchown(). See src/functions.h for more explanation */
857 exim_chown_failure(int fd, const uschar *name, uid_t owner, gid_t group)
859 int saved_errno = errno; /* from the preceeding chown call */
861 log_write(0, LOG_MAIN|LOG_PANIC,
862 __FILE__ ":%d: chown(%s, %d:%d) failed (%s)."
863 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
864 __LINE__, name?name:US"<unknown>", owner, group, strerror(errno));
866 /* I leave this here, commented, in case the "bug"(?) comes up again.
867 It is not an Exim bug, but we can provide a workaround.
873 if (0 == (fd < 0 ? stat(name, &buf) : fstat(fd, &buf)))
875 if (buf.st_uid == owner && buf.st_gid == group) return 0;
876 log_write(0, LOG_MAIN|LOG_PANIC, "Wrong ownership on %s", name);
878 else log_write(0, LOG_MAIN|LOG_PANIC, "Stat failed on %s: %s", name, strerror(errno));
886 /*************************************************
887 * Extract port from host address *
888 *************************************************/
890 /* Called to extract the port from the values given to -oMa and -oMi.
891 It also checks the syntax of the address, and terminates it before the
892 port data when a port is extracted.
895 address the address, with possible port on the end
897 Returns: the port, or zero if there isn't one
898 bombs out on a syntax error
902 check_port(uschar *address)
904 int port = host_address_extract_port(address);
905 if (string_is_ip_address(address, NULL) == 0)
906 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address);
912 /*************************************************
913 * Test/verify an address *
914 *************************************************/
916 /* This function is called by the -bv and -bt code. It extracts a working
917 address from a full RFC 822 address. This isn't really necessary per se, but it
918 has the effect of collapsing source routes.
922 flags flag bits for verify_address()
923 exit_value to be set for failures
929 test_address(uschar *s, int flags, int *exit_value)
931 int start, end, domain;
932 uschar *parse_error = NULL;
933 uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
937 fprintf(stdout, "syntax error: %s\n", parse_error);
942 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
943 -1, -1, NULL, NULL, NULL);
944 if (rc == FAIL) *exit_value = 2;
945 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
951 /*************************************************
952 * Show supported features *
953 *************************************************/
956 show_db_version(FILE * f)
958 #ifdef DB_VERSION_STRING
961 fprintf(f, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING);
962 fprintf(f, " Runtime: %s\n",
963 db_version(NULL, NULL, NULL));
966 fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
968 #elif defined(BTREEVERSION) && defined(HASHVERSION)
970 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
972 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
975 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
976 fprintf(f, "Probably ndbm\n");
977 #elif defined(USE_TDB)
978 fprintf(f, "Using tdb\n");
981 fprintf(f, "Probably GDBM (native mode)\n");
983 fprintf(f, "Probably GDBM (compatibility mode)\n");
989 /* This function is called for -bV/--version and for -d to output the optional
990 features of the current Exim binary.
992 Arguments: a FILE for printing
997 show_whats_supported(FILE * fp)
999 rmark reset_point = store_mark();
1001 DEBUG(D_any) {} else show_db_version(fp);
1003 g = string_cat(NULL, US"Support for:");
1004 #ifdef SUPPORT_CRYPTEQ
1005 g = string_cat(g, US" crypteq");
1008 g = string_cat(g, US" iconv()");
1011 g = string_cat(g, US" IPv6");
1013 #ifdef HAVE_SETCLASSRESOURCES
1014 g = string_cat(g, US" use_setclassresources");
1017 g = string_cat(g, US" PAM");
1020 g = string_cat(g, US" Perl");
1022 #ifdef EXPAND_DLFUNC
1023 g = string_cat(g, US" Expand_dlfunc");
1025 #ifdef USE_TCP_WRAPPERS
1026 g = string_cat(g, US" TCPwrappers");
1029 g = string_cat(g, US" GnuTLS");
1032 g = string_cat(g, US" OpenSSL");
1034 #ifndef DISABLE_TLS_RESUME
1035 g = string_cat(g, US" TLS_resume");
1037 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
1038 g = string_cat(g, US" translate_ip_address");
1040 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
1041 g = string_cat(g, US" move_frozen_messages");
1043 #ifdef WITH_CONTENT_SCAN
1044 g = string_cat(g, US" Content_Scanning");
1047 g = string_cat(g, US" DANE");
1049 #ifndef DISABLE_DKIM
1050 g = string_cat(g, US" DKIM");
1052 #ifdef SUPPORT_DMARC
1053 g = string_cat(g, US" DMARC");
1055 #ifndef DISABLE_DNSSEC
1056 g = string_cat(g, US" DNSSEC");
1058 #ifndef DISABLE_EVENT
1059 g = string_cat(g, US" Event");
1062 g = string_cat(g, US" I18N");
1064 #ifndef DISABLE_OCSP
1065 g = string_cat(g, US" OCSP");
1067 #ifndef DISABLE_PIPE_CONNECT
1068 g = string_cat(g, US" PIPECONNECT");
1070 #ifndef DISABLE_PRDR
1071 g = string_cat(g, US" PRDR");
1073 #ifdef SUPPORT_PROXY
1074 g = string_cat(g, US" PROXY");
1076 #ifndef DISABLE_QUEUE_RAMP
1077 g = string_cat(g, US" Queue_Ramp");
1079 #ifdef SUPPORT_SOCKS
1080 g = string_cat(g, US" SOCKS");
1083 g = string_cat(g, US" SPF");
1085 #if defined(SUPPORT_SRS)
1086 g = string_cat(g, US" SRS");
1090 if (f.tcp_fastopen_ok) g = string_cat(g, US" TCP_Fast_Open");
1092 #ifdef EXPERIMENTAL_ARC
1093 g = string_cat(g, US" Experimental_ARC");
1095 #ifdef EXPERIMENTAL_BRIGHTMAIL
1096 g = string_cat(g, US" Experimental_Brightmail");
1098 #ifdef EXPERIMENTAL_DCC
1099 g = string_cat(g, US" Experimental_DCC");
1101 #ifdef EXPERIMENTAL_DSN_INFO
1102 g = string_cat(g, US" Experimental_DSN_info");
1104 #ifdef EXPERIMENTAL_ESMTP_LIMITS
1105 g = string_cat(g, US" Experimental_ESMTP_Limits");
1107 #ifdef EXPERIMENTAL_QUEUEFILE
1108 g = string_cat(g, US" Experimental_QUEUEFILE");
1110 #if defined(EXPERIMENTAL_SRS_ALT)
1111 g = string_cat(g, US" Experimental_SRS");
1113 g = string_cat(g, US"\n");
1115 g = string_cat(g, US"Lookups (built-in):");
1116 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
1117 g = string_cat(g, US" lsearch wildlsearch nwildlsearch iplsearch");
1119 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
1120 g = string_cat(g, US" cdb");
1122 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
1123 g = string_cat(g, US" dbm dbmjz dbmnz");
1125 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
1126 g = string_cat(g, US" dnsdb");
1128 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
1129 g = string_cat(g, US" dsearch");
1131 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
1132 g = string_cat(g, US" ibase");
1134 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
1135 g = string_cat(g, US" json");
1137 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
1138 g = string_cat(g, US" ldap ldapdn ldapm");
1141 g = string_cat(g, US" lmdb");
1143 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
1144 g = string_cat(g, US" mysql");
1146 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
1147 g = string_cat(g, US" nis nis0");
1149 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
1150 g = string_cat(g, US" nisplus");
1152 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
1153 g = string_cat(g, US" oracle");
1155 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1156 g = string_cat(g, US" passwd");
1158 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1159 g = string_cat(g, US" pgsql");
1161 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1162 g = string_cat(g, US" redis");
1164 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1165 g = string_cat(g, US" sqlite");
1167 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1168 g = string_cat(g, US" testdb");
1170 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1171 g = string_cat(g, US" whoson");
1173 g = string_cat(g, US"\n");
1175 g = auth_show_supported(g);
1176 g = route_show_supported(g);
1177 g = transport_show_supported(g);
1179 #ifdef WITH_CONTENT_SCAN
1180 g = malware_show_supported(g);
1183 if (fixed_never_users[0] > 0)
1186 g = string_cat(g, US"Fixed never_users: ");
1187 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1188 string_fmt_append(g, "%u:", (unsigned)fixed_never_users[i]);
1189 g = string_fmt_append(g, "%u\n", (unsigned)fixed_never_users[i]);
1192 g = string_fmt_append(g, "Configure owner: %d:%d\n", config_uid, config_gid);
1193 fputs(CS string_from_gstring(g), fp);
1195 fprintf(fp, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
1197 /* Everything else is details which are only worth reporting when debugging.
1198 Perhaps the tls_version_report should move into this too. */
1201 /* clang defines __GNUC__ (at least, for me) so test for it first */
1202 #if defined(__clang__)
1203 fprintf(fp, "Compiler: CLang [%s]\n", __clang_version__);
1204 #elif defined(__GNUC__)
1205 fprintf(fp, "Compiler: GCC [%s]\n",
1209 "? unknown version ?"
1213 fprintf(fp, "Compiler: <unknown>\n");
1216 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1217 fprintf(fp, "Library version: Glibc: Compile: %d.%d\n",
1218 __GLIBC__, __GLIBC_MINOR__);
1219 if (__GLIBC_PREREQ(2, 1))
1220 fprintf(fp, " Runtime: %s\n",
1221 gnu_get_libc_version());
1224 show_db_version(fp);
1227 tls_version_report(fp);
1230 utf8_version_report(fp);
1232 #ifdef SUPPORT_DMARC
1233 dmarc_version_report(fp);
1236 spf_lib_version_report(fp);
1239 for (auth_info * authi = auths_available; *authi->driver_name != '\0'; ++authi)
1240 if (authi->version_report)
1241 (*authi->version_report)(fp);
1243 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1244 characters; unless it's an ancient version of PCRE in which case it
1246 #ifndef PCRE_PRERELEASE
1247 # define PCRE_PRERELEASE
1250 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1253 pcre2_config(PCRE2_CONFIG_VERSION, buf);
1254 fprintf(fp, "Library version: PCRE2: Compile: %d.%d%s\n"
1256 PCRE2_MAJOR, PCRE2_MINOR,
1257 EXPAND_AND_QUOTE(PCRE2_PRERELEASE) "",
1261 #undef EXPAND_AND_QUOTE
1264 for (int i = 0; i < lookup_list_count; i++)
1265 if (lookup_list[i]->version_report)
1266 lookup_list[i]->version_report(fp);
1268 #ifdef WHITELIST_D_MACROS
1269 fprintf(fp, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1271 fprintf(fp, "WHITELIST_D_MACROS unset\n");
1273 #ifdef TRUSTED_CONFIG_LIST
1274 fprintf(fp, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1276 fprintf(fp, "TRUSTED_CONFIG_LIST unset\n");
1280 store_reset(reset_point);
1284 /*************************************************
1285 * Show auxiliary information about Exim *
1286 *************************************************/
1289 show_exim_information(enum commandline_info request, FILE *stream)
1294 fprintf(stream, "Oops, something went wrong.\n");
1298 "The -bI: flag takes a string indicating which information to provide.\n"
1299 "If the string is not recognised, you'll get this help (on stderr).\n"
1301 " exim -bI:help this information\n"
1302 " exim -bI:dscp list of known dscp value keywords\n"
1303 " exim -bI:sieve list of supported sieve extensions\n"
1307 for (const uschar ** pp = exim_sieve_extension_list; *pp; ++pp)
1308 fprintf(stream, "%s\n", *pp);
1311 dscp_list_to_stream(stream);
1317 /*************************************************
1318 * Quote a local part *
1319 *************************************************/
1321 /* This function is used when a sender address or a From: or Sender: header
1322 line is being created from the caller's login, or from an authenticated_id. It
1323 applies appropriate quoting rules for a local part.
1325 Argument: the local part
1326 Returns: the local part, quoted if necessary
1330 local_part_quote(uschar *lpart)
1332 BOOL needs_quote = FALSE;
1335 for (uschar * t = lpart; !needs_quote && *t != 0; t++)
1337 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1338 (*t != '.' || t == lpart || t[1] == 0);
1341 if (!needs_quote) return lpart;
1343 g = string_catn(NULL, US"\"", 1);
1347 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1350 g = string_cat(g, lpart);
1353 g = string_catn(g, lpart, nq - lpart);
1354 g = string_catn(g, US"\\", 1);
1355 g = string_catn(g, nq, 1);
1359 g = string_catn(g, US"\"", 1);
1360 return string_from_gstring(g);
1366 /*************************************************
1367 * Load readline() functions *
1368 *************************************************/
1370 /* This function is called from testing executions that read data from stdin,
1371 but only when running as the calling user. Currently, only -be does this. The
1372 function loads the readline() function library and passes back the functions.
1373 On some systems, it needs the curses library, so load that too, but try without
1374 it if loading fails. All this functionality has to be requested at build time.
1377 fn_readline_ptr pointer to where to put the readline pointer
1378 fn_addhist_ptr pointer to where to put the addhistory function
1380 Returns: the dlopen handle or NULL on failure
1384 set_readline(char * (**fn_readline_ptr)(const char *),
1385 void (**fn_addhist_ptr)(const char *))
1388 void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
1390 dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
1391 if (dlhandle_curses) dlclose(dlhandle_curses);
1395 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1396 * char * readline (const char *prompt);
1397 * void add_history (const char *string);
1399 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1400 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
1403 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1411 /*************************************************
1412 * Get a line from stdin for testing things *
1413 *************************************************/
1415 /* This function is called when running tests that can take a number of lines
1416 of input (for example, -be and -bt). It handles continuations and trailing
1417 spaces. And prompting and a blank line output on eof. If readline() is in use,
1418 the arguments are non-NULL and provide the relevant functions.
1421 fn_readline readline function or NULL
1422 fn_addhist addhist function or NULL
1424 Returns: pointer to dynamic memory, or NULL at end of file
1428 get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
1431 BOOL had_input = FALSE;
1433 if (!fn_readline) { printf("> "); fflush(stdout); }
1435 for (int i = 0;; i++)
1437 uschar buffer[1024];
1441 char *readline_line = NULL;
1444 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1445 if (*readline_line && fn_addhist) fn_addhist(readline_line);
1446 p = US readline_line;
1451 /* readline() not in use */
1454 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break; /*EOF*/
1458 /* Handle the line */
1461 ss = p + Ustrlen(p);
1462 while (ss > p && isspace(ss[-1])) ss--; /* strip trailing newline (and spaces) */
1465 while (p < ss && isspace(*p)) p++; /* strip leading space after cont */
1467 g = string_catn(g, p, ss - p);
1470 if (fn_readline) free(readline_line);
1473 /* g can only be NULL if ss==p */
1474 if (ss == p || g->s[g->ptr-1] != '\\') /* not continuation; done */
1477 --g->ptr; /* drop the \ */
1480 if (had_input) return g ? string_from_gstring(g) : US"";
1487 /*************************************************
1488 * Output usage information for the program *
1489 *************************************************/
1491 /* This function is called when there are no recipients
1492 or a specific --help argument was added.
1495 progname information on what name we were called by
1497 Returns: DOES NOT RETURN
1501 exim_usage(uschar *progname)
1504 /* Handle specific program invocation variants */
1505 if (Ustrcmp(progname, US"-mailq") == 0)
1507 "mailq - list the contents of the mail queue\n\n"
1508 "For a list of options, see the Exim documentation.\n");
1510 /* Generic usage - we output this whatever happens */
1512 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1513 "not directly from a shell command line. Options and/or arguments control\n"
1514 "what it does when called. For a list of options, see the Exim documentation.\n");
1519 /*************************************************
1520 * Validate that the macros given are okay *
1521 *************************************************/
1523 /* Typically, Exim will drop privileges if macros are supplied. In some
1524 cases, we want to not do so.
1526 Arguments: opt_D_used - true if the commandline had a "-D" option
1527 Returns: true if trusted, false otherwise
1531 macros_trusted(BOOL opt_D_used)
1533 #ifdef WHITELIST_D_MACROS
1534 uschar *whitelisted, *end, *p, **whites;
1535 int white_count, i, n;
1537 BOOL prev_char_item, found;
1542 #ifndef WHITELIST_D_MACROS
1546 /* We only trust -D overrides for some invoking users:
1547 root, the exim run-time user, the optional config owner user.
1548 I don't know why config-owner would be needed, but since they can own the
1549 config files anyway, there's no security risk to letting them override -D. */
1550 if ( ! ((real_uid == root_uid)
1551 || (real_uid == exim_uid)
1552 #ifdef CONFIGURE_OWNER
1553 || (real_uid == config_uid)
1557 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1561 /* Get a list of macros which are whitelisted */
1562 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1563 prev_char_item = FALSE;
1565 for (p = whitelisted; *p != '\0'; ++p)
1567 if (*p == ':' || isspace(*p))
1572 prev_char_item = FALSE;
1575 if (!prev_char_item)
1576 prev_char_item = TRUE;
1583 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1584 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1589 if (i == white_count)
1591 while (*p != '\0' && p < end)
1597 /* The list of commandline macros should be very short.
1598 Accept the N*M complexity. */
1599 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1602 for (uschar ** w = whites; *w; ++w)
1603 if (Ustrcmp(*w, m->name) == 0)
1610 if (!m->replacement)
1612 if ((len = m->replen) == 0)
1614 if (!regex_match(regex_whitelisted_macro, m->replacement, len, NULL))
1617 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1623 /*************************************************
1624 * Expansion testing *
1625 *************************************************/
1627 /* Expand and print one item, doing macro-processing.
1630 item line for expansion
1634 expansion_test_line(const uschar * line)
1640 Ustrncpy(big_buffer, line, big_buffer_size);
1641 big_buffer[big_buffer_size-1] = '\0';
1642 len = Ustrlen(big_buffer);
1644 (void) macros_expand(0, &len, &dummy_macexp);
1646 if (isupper(big_buffer[0]))
1648 if (macro_read_assignment(big_buffer))
1649 printf("Defined macro '%s'\n", mlast->name);
1652 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1653 else printf("Failed: %s\n", expand_string_message);
1658 /*************************************************
1659 * Entry point and high-level code *
1660 *************************************************/
1662 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1663 the appropriate action. All the necessary functions are present in the one
1664 binary. I originally thought one should split it up, but it turns out that so
1665 much of the apparatus is needed in each chunk that one might as well just have
1666 it all available all the time, which then makes the coding easier as well.
1669 argc count of entries in argv
1670 argv argument strings, with argv[0] being the program name
1672 Returns: EXIT_SUCCESS if terminated successfully
1673 EXIT_FAILURE otherwise, except when a message has been sent
1674 to the sender, and -oee was given
1678 main(int argc, char **cargv)
1680 uschar **argv = USS cargv;
1681 int arg_receive_timeout = -1;
1682 int arg_smtp_receive_timeout = -1;
1683 int arg_error_handling = error_handling;
1684 int filter_sfd = -1;
1685 int filter_ufd = -1;
1688 int list_queue_option = 0;
1690 int msg_action_arg = -1;
1691 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1692 int queue_only_reason = 0;
1694 int perl_start_option = 0;
1696 int recipients_arg = argc;
1697 int sender_address_domain = 0;
1698 int test_retry_arg = -1;
1699 int test_rewrite_arg = -1;
1700 gid_t original_egid;
1701 BOOL arg_queue_only = FALSE;
1702 BOOL bi_option = FALSE;
1703 BOOL checking = FALSE;
1704 BOOL count_queue = FALSE;
1705 BOOL expansion_test = FALSE;
1706 BOOL extract_recipients = FALSE;
1707 BOOL flag_G = FALSE;
1708 BOOL flag_n = FALSE;
1709 BOOL forced_delivery = FALSE;
1710 BOOL f_end_dot = FALSE;
1711 BOOL deliver_give_up = FALSE;
1712 BOOL list_queue = FALSE;
1713 BOOL list_options = FALSE;
1714 BOOL list_config = FALSE;
1715 BOOL local_queue_only;
1716 BOOL one_msg_action = FALSE;
1717 BOOL opt_D_used = FALSE;
1718 BOOL queue_only_set = FALSE;
1719 BOOL receiving_message = TRUE;
1720 BOOL sender_ident_set = FALSE;
1721 BOOL session_local_queue_only;
1723 BOOL removed_privilege = FALSE;
1724 BOOL usage_wanted = FALSE;
1725 BOOL verify_address_mode = FALSE;
1726 BOOL verify_as_sender = FALSE;
1727 BOOL rcpt_verify_quota = FALSE;
1728 BOOL version_printed = FALSE;
1729 uschar *alias_arg = NULL;
1730 uschar *called_as = US"";
1731 uschar *cmdline_syslog_name = NULL;
1732 uschar *start_queue_run_id = NULL;
1733 uschar *stop_queue_run_id = NULL;
1734 uschar *expansion_test_message = NULL;
1735 const uschar *ftest_domain = NULL;
1736 const uschar *ftest_localpart = NULL;
1737 const uschar *ftest_prefix = NULL;
1738 const uschar *ftest_suffix = NULL;
1739 uschar *log_oneline = NULL;
1740 uschar *malware_test_file = NULL;
1741 uschar *real_sender_address;
1742 uschar *originator_home = US"/";
1746 struct stat statbuf;
1747 pid_t passed_qr_pid = (pid_t)0;
1748 int passed_qr_pipe = -1;
1749 gid_t group_list[EXIM_GROUPLIST_SIZE];
1751 /* For the -bI: flag */
1752 enum commandline_info info_flag = CMDINFO_NONE;
1753 BOOL info_stdout = FALSE;
1755 /* Possible options for -R and -S */
1757 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1759 /* Need to define this in case we need to change the environment in order
1760 to get rid of a bogus time zone. We have to make it char rather than uschar
1761 because some OS define it in /usr/include/unistd.h. */
1763 extern char **environ;
1765 #ifdef MEASURE_TIMING
1766 (void)gettimeofday(×tamp_startup, NULL);
1769 store_init(); /* Initialise the memory allocation susbsystem */
1770 pcre_init(); /* Set up memory handling for pcre */
1772 /* If the Exim user and/or group and/or the configuration file owner/group were
1773 defined by ref:name at build time, we must now find the actual uid/gid values.
1774 This is a feature to make the lives of binary distributors easier. */
1776 #ifdef EXIM_USERNAME
1777 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1780 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1782 /* If ref:name uses a number as the name, route_finduser() returns
1783 TRUE with exim_uid set and pw coerced to NULL. */
1785 exim_gid = pw->pw_gid;
1786 #ifndef EXIM_GROUPNAME
1789 "exim: ref:name should specify a usercode, not a group.\n"
1790 "exim: can't let you get away with it unless you also specify a group.\n");
1794 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1797 #ifdef EXIM_GROUPNAME
1798 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1799 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1802 #ifdef CONFIGURE_OWNERNAME
1803 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1804 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1805 CONFIGURE_OWNERNAME);
1808 /* We default the system_filter_user to be the Exim run-time user, as a
1809 sane non-root value. */
1810 system_filter_uid = exim_uid;
1812 #ifdef CONFIGURE_GROUPNAME
1813 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1814 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1815 CONFIGURE_GROUPNAME);
1818 /* In the Cygwin environment, some initialization used to need doing.
1819 It was fudged in by means of this macro; now no longer but we'll leave
1820 it in case of others. */
1826 /* Check a field which is patched when we are running Exim within its
1827 testing harness; do a fast initial check, and then the whole thing. */
1829 f.running_in_test_harness =
1830 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1831 if (f.running_in_test_harness)
1834 /* Protect against abusive argv[0] */
1835 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1837 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1838 at the start of a program; however, it seems that some environments do not
1839 follow this. A "strange" locale can affect the formatting of timestamps, so we
1842 setlocale(LC_ALL, "C");
1844 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1846 #ifdef _POSIX_MONOTONIC_CLOCK
1850 /* Set up the default handler for timing using alarm(). */
1852 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1854 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1855 because store_malloc writes a log entry on failure. */
1857 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1858 exim_fail("exim: failed to get store for log buffer\n");
1860 /* Initialize the default log options. */
1862 bits_set(log_selector, log_selector_size, log_default);
1864 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1865 NULL when the daemon is run and the file is closed. We have to use this
1866 indirection, because some systems don't allow writing to the variable "stderr".
1869 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1871 /* Ensure there is a big buffer for temporary use in several places. It is put
1872 in malloc store so that it can be freed for enlargement if necessary. */
1874 big_buffer = store_malloc(big_buffer_size);
1876 /* Set up the handler for the data request signal, and set the initial
1877 descriptive text. */
1879 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1880 set_process_info("initializing");
1881 os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
1884 struct sigaction act = { .sa_sigaction = segv_handler, .sa_flags = SA_RESETHAND | SA_SIGINFO };
1885 sigaction(SIGSEGV, &act, NULL);
1888 signal(SIGSEGV, segv_handler); /* log faults */
1891 /* If running in a dockerized environment, the TERM signal is only
1892 delegated to the PID 1 if we request it by setting an signal handler */
1893 if (getpid() == 1) signal(SIGTERM, term_handler);
1895 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1896 in the daemon code. For the rest of Exim's uses, we ignore it. */
1898 signal(SIGHUP, SIG_IGN);
1900 /* We don't want to die on pipe errors as the code is written to handle
1901 the write error instead. */
1903 signal(SIGPIPE, SIG_IGN);
1905 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1906 set to SIG_IGN. This causes subprocesses that complete before the parent
1907 process waits for them not to hang around, so when Exim calls wait(), nothing
1908 is there. The wait() code has been made robust against this, but let's ensure
1909 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1910 ending status. We use sigaction rather than plain signal() on those OS where
1911 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1912 problem on AIX with this.) */
1916 struct sigaction act;
1917 act.sa_handler = SIG_DFL;
1918 sigemptyset(&(act.sa_mask));
1920 sigaction(SIGCHLD, &act, NULL);
1923 signal(SIGCHLD, SIG_DFL);
1926 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1931 /* Set up the version number. Set up the leading 'E' for the external form of
1932 message ids, set the pointer to the internal form, and initialize it to
1933 indicate no message being processed. */
1936 message_id_option[0] = '-';
1937 message_id_external = message_id_option + 1;
1938 message_id_external[0] = 'E';
1939 message_id = message_id_external + 1;
1942 /* Set the umask to zero so that any files Exim creates using open() are
1943 created with the modes that it specifies. NOTE: Files created with fopen() have
1944 a problem, which was not recognized till rather late (February 2006). With this
1945 umask, such files will be world writeable. (They are all content scanning files
1946 in the spool directory, which isn't world-accessible, so this is not a
1947 disaster, but it's untidy.) I don't want to change this overall setting,
1948 however, because it will interact badly with the open() calls. Instead, there's
1949 now a function called modefopen() that fiddles with the umask while calling
1954 /* Precompile the regular expression for matching a message id. Keep this in
1955 step with the code that generates ids in the accept.c module. We need to do
1956 this here, because the -M options check their arguments for syntactic validity
1957 using mac_ismsgid, which uses this. */
1960 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1962 /* Precompile the regular expression that is used for matching an SMTP error
1963 code, possibly extended, at the start of an error message. Note that the
1964 terminating whitespace character is included. */
1967 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1970 #ifdef WHITELIST_D_MACROS
1971 /* Precompile the regular expression used to filter the content of macros
1972 given to -D for permissibility. */
1974 regex_whitelisted_macro =
1975 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1978 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1980 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1981 this seems to be a generally accepted convention, since one finds symbolic
1982 links called "mailq" in standard OS configurations. */
1984 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1985 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1988 receiving_message = FALSE;
1989 called_as = US"-mailq";
1992 /* If the program is called as "rmail" treat it as equivalent to
1993 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1994 i.e. preventing a single dot on a line from terminating the message, and
1995 returning with zero return code, even in cases of error (provided an error
1996 message has been sent). */
1998 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1999 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
2002 called_as = US"-rmail";
2003 errors_sender_rc = EXIT_SUCCESS;
2006 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
2007 this is a smail convention. */
2009 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
2010 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
2012 smtp_input = smtp_batched_input = TRUE;
2013 called_as = US"-rsmtp";
2016 /* If the program is called as "runq" treat it as equivalent to "exim -q";
2017 this is a smail convention. */
2019 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
2020 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
2023 receiving_message = FALSE;
2024 called_as = US"-runq";
2027 /* If the program is called as "newaliases" treat it as equivalent to
2028 "exim -bi"; this is a sendmail convention. */
2030 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
2031 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
2034 receiving_message = FALSE;
2035 called_as = US"-newaliases";
2038 /* Save the original effective uid for a couple of uses later. It should
2039 normally be root, but in some esoteric environments it may not be. */
2041 original_euid = geteuid();
2042 original_egid = getegid();
2044 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
2045 to be the same as the real ones. This makes a difference only if Exim is setuid
2046 (or setgid) to something other than root, which could be the case in some
2047 special configurations. */
2049 real_uid = getuid();
2050 real_gid = getgid();
2052 if (real_uid == root_uid)
2054 if ((rv = setgid(real_gid)))
2055 exim_fail("exim: setgid(%ld) failed: %s\n",
2056 (long int)real_gid, strerror(errno));
2057 if ((rv = setuid(real_uid)))
2058 exim_fail("exim: setuid(%ld) failed: %s\n",
2059 (long int)real_uid, strerror(errno));
2062 /* If neither the original real uid nor the original euid was root, Exim is
2063 running in an unprivileged state. */
2065 unprivileged = (real_uid != root_uid && original_euid != root_uid);
2067 /* For most of the args-parsing we need to use permanent pool memory */
2069 int old_pool = store_pool;
2070 store_pool = POOL_PERM;
2072 /* Scan the program's arguments. Some can be dealt with right away; others are
2073 simply recorded for checking and handling afterwards. Do a high-level switch
2074 on the second character (the one after '-'), to save some effort. */
2076 for (i = 1; i < argc; i++)
2078 BOOL badarg = FALSE;
2079 uschar * arg = argv[i];
2083 /* An argument not starting with '-' is the start of a recipients list;
2084 break out of the options-scanning loop. */
2092 /* An option consisting of -- terminates the options */
2094 if (Ustrcmp(arg, "--") == 0)
2096 recipients_arg = i + 1;
2100 /* Handle flagged options */
2102 switchchar = arg[1];
2105 /* Make all -ex options synonymous with -oex arguments, since that
2106 is assumed by various callers. Also make -qR options synonymous with -R
2107 options, as that seems to be required as well. Allow for -qqR too, and
2108 the same for -S options. */
2110 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2111 Ustrncmp(arg+1, "qR", 2) == 0 ||
2112 Ustrncmp(arg+1, "qS", 2) == 0)
2114 switchchar = arg[2];
2117 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2119 switchchar = arg[3];
2121 f.queue_2stage = TRUE;
2124 /* Make -r synonymous with -f, since it is a documented alias */
2126 else if (arg[1] == 'r') switchchar = 'f';
2128 /* Make -ov synonymous with -v */
2130 else if (Ustrcmp(arg, "-ov") == 0)
2136 /* deal with --option_aliases */
2137 else if (switchchar == '-')
2139 if (Ustrcmp(argrest, "help") == 0)
2141 usage_wanted = TRUE;
2144 else if (Ustrcmp(argrest, "version") == 0)
2151 /* High-level switch on active initial letter */
2156 /* sendmail uses -Ac and -Am to control which .cf file is used;
2159 if (!*argrest) { badarg = TRUE; break; }
2162 BOOL ignore = FALSE;
2167 if (*(argrest + 1) == '\0')
2171 if (!ignore) badarg = TRUE;
2175 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2176 so has no need of it. */
2179 if (!*argrest) i++; /* Skip over the type */
2185 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2189 /* -bd: Run in daemon mode, awaiting SMTP connections.
2190 -bdf: Ditto, but in the foreground.
2193 f.daemon_listen = TRUE;
2194 if (*argrest == 'f') f.background_daemon = FALSE;
2195 else if (*argrest) badarg = TRUE;
2198 /* -be: Run in expansion test mode
2199 -bem: Ditto, but read a message from a file first
2202 expansion_test = checking = TRUE;
2203 if (*argrest == 'm')
2205 if (++i >= argc) { badarg = TRUE; break; }
2206 expansion_test_message = argv[i];
2209 if (*argrest) badarg = TRUE;
2212 /* -bF: Run system filter test */
2214 filter_test |= checking = FTEST_SYSTEM;
2215 if (*argrest) badarg = TRUE;
2216 else if (++i < argc) filter_test_sfile = argv[i];
2217 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2220 /* -bf: Run user filter test
2221 -bfd: Set domain for filter testing
2222 -bfl: Set local part for filter testing
2223 -bfp: Set prefix for filter testing
2224 -bfs: Set suffix for filter testing
2229 filter_test |= checking = FTEST_USER;
2230 if (++i < argc) filter_test_ufile = argv[i];
2231 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2236 exim_fail("exim: string expected after %s\n", arg);
2237 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2238 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2239 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2240 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2245 /* -bh: Host checking - an IP address must follow. */
2247 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2249 if (++i >= argc) { badarg = TRUE; break; }
2250 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2251 host_checking = checking = f.log_testing_mode = TRUE;
2252 f.host_checking_callout = *argrest == 'c';
2253 message_logs = FALSE;
2258 /* -bi: This option is used by sendmail to initialize *the* alias file,
2259 though it has the -oA option to specify a different file. Exim has no
2260 concept of *the* alias file, but since Sun's YP make script calls
2261 sendmail this way, some support must be provided. */
2263 if (!*argrest) bi_option = TRUE;
2267 /* -bI: provide information, of the type to follow after a colon.
2268 This is an Exim flag. */
2270 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2272 uschar *p = argrest+1;
2273 info_flag = CMDINFO_HELP;
2275 if (strcmpic(p, CUS"sieve") == 0)
2277 info_flag = CMDINFO_SIEVE;
2280 else if (strcmpic(p, CUS"dscp") == 0)
2282 info_flag = CMDINFO_DSCP;
2285 else if (strcmpic(p, CUS"help") == 0)
2291 /* -bm: Accept and deliver message - the default option. Reinstate
2292 receiving_message, which got turned off for all -b options.
2293 -bmalware: test the filename given for malware */
2295 if (!*argrest) receiving_message = TRUE;
2296 else if (Ustrcmp(argrest, "alware") == 0)
2298 if (++i >= argc) { badarg = TRUE; break; }
2300 malware_test_file = argv[i];
2305 /* -bnq: For locally originating messages, do not qualify unqualified
2306 addresses. In the envelope, this causes errors; in header lines they
2309 if (Ustrcmp(argrest, "q") == 0)
2311 f.allow_unqualified_sender = FALSE;
2312 f.allow_unqualified_recipient = FALSE;
2317 /* -bpxx: List the contents of the mail queue, in various forms. If
2318 the option is -bpc, just a queue count is needed. Otherwise, if the
2319 first letter after p is r, then order is random. */
2321 if (*argrest == 'c')
2324 if (*++argrest) badarg = TRUE;
2328 if (*argrest == 'r')
2330 list_queue_option = 8;
2333 else list_queue_option = 0;
2337 /* -bp: List the contents of the mail queue, top-level only */
2341 /* -bpu: List the contents of the mail queue, top-level undelivered */
2343 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2345 /* -bpa: List the contents of the mail queue, including all delivered */
2347 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2349 /* Unknown after -bp[r] */
2355 /* -bP: List the configuration variables given as the address list.
2356 Force -v, so configuration errors get displayed. */
2359 /* -bP config: we need to setup here, because later,
2360 when list_options is checked, the config is read already */
2363 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2366 readconf_save_config(version_string);
2370 list_options = TRUE;
2371 debug_selector |= D_v;
2372 debug_file = stderr;
2376 /* -brt: Test retry configuration lookup */
2378 if (Ustrcmp(argrest, "t") == 0)
2381 test_retry_arg = i + 1;
2385 /* -brw: Test rewrite configuration */
2387 else if (Ustrcmp(argrest, "w") == 0)
2390 test_rewrite_arg = i + 1;
2396 /* -bS: Read SMTP commands on standard input, but produce no replies -
2397 all errors are reported by sending messages. */
2400 smtp_input = smtp_batched_input = receiving_message = TRUE;
2404 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2405 on standard output. */
2407 if (!*argrest) smtp_input = receiving_message = TRUE;
2411 /* -bt: address testing mode */
2414 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2418 /* -bv: verify addresses */
2421 verify_address_mode = checking = f.log_testing_mode = TRUE;
2423 /* -bvs: verify sender addresses */
2425 else if (Ustrcmp(argrest, "s") == 0)
2427 verify_address_mode = checking = f.log_testing_mode = TRUE;
2428 verify_as_sender = TRUE;
2433 /* -bV: Print version string and support details */
2437 printf("Exim version %s #%s built %s\n", version_string,
2438 version_cnumber, version_date);
2439 printf("%s\n", CS version_copyright);
2440 version_printed = TRUE;
2441 show_whats_supported(stdout);
2442 f.log_testing_mode = TRUE;
2447 /* -bw: inetd wait mode, accept a listening socket as stdin */
2449 f.inetd_wait_mode = TRUE;
2450 f.background_daemon = FALSE;
2451 f.daemon_listen = TRUE;
2453 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2454 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2465 /* -C: change configuration file list; ignore if it isn't really
2466 a change! Enforce a prefix check if required. */
2470 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2471 if (Ustrcmp(config_main_filelist, argrest) != 0)
2473 #ifdef ALT_CONFIG_PREFIX
2475 int len = Ustrlen(ALT_CONFIG_PREFIX);
2476 const uschar *list = argrest;
2478 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2479 while((filename = string_nextinlist(&list, &sep, big_buffer,
2481 if ( ( Ustrlen(filename) < len
2482 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2483 || Ustrstr(filename, "/../") != NULL
2485 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2487 exim_fail("-C Permission denied\n");
2489 if (real_uid != root_uid)
2491 #ifdef TRUSTED_CONFIG_LIST
2493 if (real_uid != exim_uid
2494 #ifdef CONFIGURE_OWNER
2495 && real_uid != config_uid
2498 f.trusted_config = FALSE;
2501 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2504 struct stat statbuf;
2506 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2507 (statbuf.st_uid != root_uid /* owner not root */
2508 #ifdef CONFIGURE_OWNER
2509 && statbuf.st_uid != config_uid /* owner not the special one */
2512 (statbuf.st_gid != root_gid /* group not root */
2513 #ifdef CONFIGURE_GROUP
2514 && statbuf.st_gid != config_gid /* group not the special one */
2516 && (statbuf.st_mode & 020) != 0 /* group writeable */
2518 (statbuf.st_mode & 2) != 0) /* world writeable */
2520 f.trusted_config = FALSE;
2525 /* Well, the trust list at least is up to scratch... */
2527 uschar *trusted_configs[32];
2530 int old_pool = store_pool;
2531 store_pool = POOL_MAIN;
2533 reset_point = store_mark();
2534 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2536 uschar *start = big_buffer, *nl;
2537 while (*start && isspace(*start))
2541 nl = Ustrchr(start, '\n');
2544 trusted_configs[nr_configs++] = string_copy(start);
2545 if (nr_configs == nelem(trusted_configs))
2553 const uschar *list = argrest;
2555 while (f.trusted_config && (filename = string_nextinlist(&list,
2556 &sep, big_buffer, big_buffer_size)))
2558 for (i=0; i < nr_configs; i++)
2559 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2561 if (i == nr_configs)
2563 f.trusted_config = FALSE;
2568 else /* No valid prefixes found in trust_list file. */
2569 f.trusted_config = FALSE;
2570 store_reset(reset_point);
2571 store_pool = old_pool;
2574 else /* Could not open trust_list file. */
2575 f.trusted_config = FALSE;
2578 /* Not root; don't trust config */
2579 f.trusted_config = FALSE;
2583 config_main_filelist = argrest;
2584 f.config_changed = TRUE;
2589 /* -D: set up a macro definition */
2592 #ifdef DISABLE_D_OPTION
2593 exim_fail("exim: -D is not available in this Exim binary\n");
2599 uschar *s = argrest;
2602 while (isspace(*s)) s++;
2604 if (*s < 'A' || *s > 'Z')
2605 exim_fail("exim: macro name set by -D must start with "
2606 "an upper case letter\n");
2608 while (isalnum(*s) || *s == '_')
2610 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2614 if (ptr == 0) { badarg = TRUE; break; }
2615 while (isspace(*s)) s++;
2618 if (*s++ != '=') { badarg = TRUE; break; }
2619 while (isspace(*s)) s++;
2622 for (m = macros_user; m; m = m->next)
2623 if (Ustrcmp(m->name, name) == 0)
2624 exim_fail("exim: duplicated -D in command line\n");
2626 m = macro_create(name, s, TRUE);
2628 if (clmacro_count >= MAX_CLMACROS)
2629 exim_fail("exim: too many -D options on command line\n");
2630 clmacros[clmacro_count++] =
2631 string_sprintf("-D%s=%s", m->name, m->replacement);
2636 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2637 The latter is now a no-op, retained for compatibility only. If -dd is used,
2638 debugging subprocesses of the daemon is disabled. */
2641 if (Ustrcmp(argrest, "ropcr") == 0)
2643 /* drop_cr = TRUE; */
2646 /* Use an intermediate variable so that we don't set debugging while
2647 decoding the debugging bits. */
2651 unsigned int selector = D_default;
2654 if (*argrest == 'd')
2656 f.debug_daemon = TRUE;
2660 decode_bits(&selector, 1, debug_notall, argrest,
2661 debug_options, debug_options_count, US"debug", 0);
2662 debug_selector = selector;
2667 /* -E: This is a local error message. This option is not intended for
2668 external use at all, but is not restricted to trusted callers because it
2669 does no harm (just suppresses certain error messages) and if Exim is run
2670 not setuid root it won't always be trusted when it generates error
2671 messages using this option. If there is a message id following -E, point
2672 message_reference at it, for logging. */
2675 f.local_error_message = TRUE;
2676 if (mac_ismsgid(argrest)) message_reference = argrest;
2680 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2681 option, so it looks as if historically the -oex options are also callable
2682 without the leading -o. So we have to accept them. Before the switch,
2683 anything starting -oe has been converted to -e. Exim does not support all
2684 of the sendmail error options. */
2687 if (Ustrcmp(argrest, "e") == 0)
2689 arg_error_handling = ERRORS_SENDER;
2690 errors_sender_rc = EXIT_SUCCESS;
2692 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2693 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2694 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2695 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2700 /* -F: Set sender's full name, used instead of the gecos entry from
2701 the password file. Since users can usually alter their gecos entries,
2702 there's no security involved in using this instead. The data can follow
2703 the -F or be in the next argument. */
2707 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2708 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2709 f.sender_name_forced = TRUE;
2713 /* -f: Set sender's address - this value is only actually used if Exim is
2714 run by a trusted user, or if untrusted_set_sender is set and matches the
2715 address, except that the null address can always be set by any user. The
2716 test for this happens later, when the value given here is ignored when not
2717 permitted. For an untrusted user, the actual sender is still put in Sender:
2718 if it doesn't match the From: header (unless no_local_from_check is set).
2719 The data can follow the -f or be in the next argument. The -r switch is an
2720 obsolete form of -f but since there appear to be programs out there that
2721 use anything that sendmail has ever supported, better accept it - the
2722 synonymizing is done before the switch above.
2724 At this stage, we must allow domain literal addresses, because we don't
2725 know what the setting of allow_domain_literals is yet. Ditto for trailing
2726 dots and strip_trailing_dot. */
2730 int dummy_start, dummy_end;
2733 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2734 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2736 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2739 uschar * temp = argrest + Ustrlen(argrest) - 1;
2740 while (temp >= argrest && isspace(*temp)) temp--;
2741 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2742 allow_domain_literals = TRUE;
2743 strip_trailing_dot = TRUE;
2745 allow_utf8_domains = TRUE;
2747 if (!(sender_address = parse_extract_address(argrest, &errmess,
2748 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2749 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2751 sender_address = string_copy_taint(sender_address, TRUE);
2753 message_smtputf8 = string_is_utf8(sender_address);
2754 allow_utf8_domains = FALSE;
2756 allow_domain_literals = FALSE;
2757 strip_trailing_dot = FALSE;
2759 f.sender_address_forced = TRUE;
2763 /* -G: sendmail invocation to specify that it's a gateway submission and
2764 sendmail may complain about problems instead of fixing them.
2765 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2766 not at this time complain about problems. */
2772 /* -h: Set the hop count for an incoming message. Exim does not currently
2773 support this; it always computes it by counting the Received: headers.
2774 To put it in will require a change to the spool header file format. */
2778 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2779 if (!isdigit(*argrest)) badarg = TRUE;
2783 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2784 not to be documented for sendmail but mailx (at least) uses it) */
2787 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2791 /* -L: set the identifier used for syslog; equivalent to setting
2792 syslog_processname in the config file, but needs to be an admin option. */
2796 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2797 if ((sz = Ustrlen(argrest)) > 32)
2798 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2800 exim_fail("exim: the -L syslog name is too short\n");
2801 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2805 receiving_message = FALSE;
2807 /* -MC: continue delivery of another message via an existing open
2808 file descriptor. This option is used for an internal call by the
2809 smtp transport when there is a pending message waiting to go to an
2810 address to which it has got a connection. Five subsequent arguments are
2811 required: transport name, host name, IP address, sequence number, and
2812 message_id. Transports may decline to create new processes if the sequence
2813 number gets too big. The channel is stdin. This (-MC) must be the last
2814 argument. There's a subsequent check that the real-uid is privileged.
2816 If we are running in the test harness. delay for a bit, to let the process
2817 that set this one up complete. This makes for repeatability of the logging,
2820 if (Ustrcmp(argrest, "C") == 0)
2822 union sockaddr_46 interface_sock;
2823 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2826 exim_fail("exim: too many or too few arguments after -MC\n");
2828 if (msg_action_arg >= 0)
2829 exim_fail("exim: incompatible arguments\n");
2831 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2832 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2833 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2834 continue_sequence = Uatoi(argv[++i]);
2835 msg_action = MSG_DELIVER;
2836 msg_action_arg = ++i;
2837 forced_delivery = TRUE;
2838 queue_run_pid = passed_qr_pid;
2839 queue_run_pipe = passed_qr_pipe;
2841 if (!mac_ismsgid(argv[i]))
2842 exim_fail("exim: malformed message id %s after -MC option\n",
2845 /* Set up $sending_ip_address and $sending_port, unless proxied */
2847 if (!continue_proxy_cipher)
2848 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2850 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2853 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2856 testharness_pause_ms(500);
2860 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2864 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2865 precedes -MC (see above). The flag indicates that the host to which
2866 Exim is connected has accepted an AUTH sequence. */
2868 case 'A': f.smtp_authenticated = TRUE; break;
2870 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2871 that exim is connected to supports the esmtp extension DSN */
2873 case 'D': smtp_peer_options |= OPTION_DSN; break;
2875 /* -MCd: for debug, set a process-purpose string */
2877 case 'd': if (++i < argc)
2878 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2882 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2883 from the commandline should be tainted - but we will need an untainted
2884 value for the spoolfile when doing a -odi delivery process. */
2886 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2890 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2892 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2894 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2895 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2896 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2898 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2900 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2905 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2906 it preceded -MC (see above) */
2908 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2910 #ifdef SUPPORT_SOCKS
2911 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2912 case 'p': proxy_session = TRUE;
2915 proxy_local_address = string_copy_taint(argv[i], TRUE);
2918 proxy_local_port = Uatoi(argv[i]);
2921 proxy_external_address = string_copy_taint(argv[i], TRUE);
2924 proxy_external_port = Uatoi(argv[i]);
2930 /* -MCQ: pass on the pid of the queue-running process that started
2931 this chain of deliveries and the fd of its synchronizing pipe; this
2932 is useful only when it precedes -MC (see above) */
2934 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2936 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2940 /* -MCq: do a quota check on the given recipient for the given size
2941 of message. Separate from -MC. */
2942 case 'q': rcpt_verify_quota = TRUE;
2943 if (++i < argc) message_size = Uatoi(argv[i]);
2947 /* -MCS: set the smtp_use_size flag; this is useful only when it
2948 precedes -MC (see above) */
2950 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2953 /* -MCs: used with -MCt; SNI was sent */
2954 /* -MCr: ditto, DANE */
2957 case 's': if (++i < argc)
2959 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2960 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2965 /* -MCt: similar to -MCT below but the connection is still open
2966 via a proxy process which handles the TLS context and coding.
2967 Require three arguments for the proxied local address and port,
2968 and the TLS cipher. */
2970 case 't': if (++i < argc)
2971 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2974 sending_port = (int)(Uatol(argv[i]));
2977 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2981 /* -MCT: set the tls_offered flag; this is useful only when it
2982 precedes -MC (see above). The flag indicates that the host to which
2983 Exim is connected has offered TLS support. */
2985 case 'T': smtp_peer_options |= OPTION_TLS; break;
2988 default: badarg = TRUE; break;
2993 /* -M[x]: various operations on the following list of message ids:
2994 -M deliver the messages, ignoring next retry times and thawing
2995 -Mc deliver the messages, checking next retry times, no thawing
2996 -Mf freeze the messages
2997 -Mg give up on the messages
2998 -Mt thaw the messages
2999 -Mrm remove the messages
3000 In the above cases, this must be the last option. There are also the
3001 following options which are followed by a single message id, and which
3002 act on that message. Some of them use the "recipient" addresses as well.
3003 -Mar add recipient(s)
3004 -MG move to a different queue
3005 -Mmad mark all recipients delivered
3006 -Mmd mark recipients(s) delivered
3008 -Mset load a message for use with -be
3010 -Mvc show copy (of whole message, in RFC 2822 format)
3017 msg_action = MSG_DELIVER;
3018 forced_delivery = f.deliver_force_thaw = TRUE;
3020 else if (Ustrcmp(argrest, "ar") == 0)
3022 msg_action = MSG_ADD_RECIPIENT;
3023 one_msg_action = TRUE;
3025 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
3026 else if (Ustrcmp(argrest, "es") == 0)
3028 msg_action = MSG_EDIT_SENDER;
3029 one_msg_action = TRUE;
3031 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
3032 else if (Ustrcmp(argrest, "g") == 0)
3034 msg_action = MSG_DELIVER;
3035 deliver_give_up = TRUE;
3037 else if (Ustrcmp(argrest, "G") == 0)
3039 msg_action = MSG_SETQUEUE;
3040 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
3042 else if (Ustrcmp(argrest, "mad") == 0)
3044 msg_action = MSG_MARK_ALL_DELIVERED;
3046 else if (Ustrcmp(argrest, "md") == 0)
3048 msg_action = MSG_MARK_DELIVERED;
3049 one_msg_action = TRUE;
3051 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
3052 else if (Ustrcmp(argrest, "set") == 0)
3054 msg_action = MSG_LOAD;
3055 one_msg_action = TRUE;
3057 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
3058 else if (Ustrcmp(argrest, "vb") == 0)
3060 msg_action = MSG_SHOW_BODY;
3061 one_msg_action = TRUE;
3063 else if (Ustrcmp(argrest, "vc") == 0)
3065 msg_action = MSG_SHOW_COPY;
3066 one_msg_action = TRUE;
3068 else if (Ustrcmp(argrest, "vh") == 0)
3070 msg_action = MSG_SHOW_HEADER;
3071 one_msg_action = TRUE;
3073 else if (Ustrcmp(argrest, "vl") == 0)
3075 msg_action = MSG_SHOW_LOG;
3076 one_msg_action = TRUE;
3078 else { badarg = TRUE; break; }
3080 /* All the -Mxx options require at least one message id. */
3082 msg_action_arg = i + 1;
3083 if (msg_action_arg >= argc)
3084 exim_fail("exim: no message ids given after %s option\n", arg);
3086 /* Some require only message ids to follow */
3088 if (!one_msg_action)
3090 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3091 exim_fail("exim: malformed message id %s after %s option\n",
3093 goto END_ARG; /* Remaining args are ids */
3096 /* Others require only one message id, possibly followed by addresses,
3097 which will be handled as normal arguments. */
3101 if (!mac_ismsgid(argv[msg_action_arg]))
3102 exim_fail("exim: malformed message id %s after %s option\n",
3103 argv[msg_action_arg], arg);
3109 /* Some programs seem to call the -om option without the leading o;
3110 for sendmail it askes for "me too". Exim always does this. */
3113 if (*argrest) badarg = TRUE;
3117 /* -N: don't do delivery - a debugging option that stops transports doing
3118 their thing. It implies debugging at the D_v level. */
3123 f.dont_deliver = TRUE;
3124 debug_selector |= D_v;
3125 debug_file = stderr;
3131 /* -n: This means "don't alias" in sendmail, apparently.
3132 For normal invocations, it has no effect.
3133 It may affect some other options. */
3139 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3140 option to the specified value. This form uses long names. We need to handle
3141 -O option=value and -Ooption=value. */
3146 exim_fail("exim: string expected after -O\n");
3152 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3155 if (!*(alias_arg = argrest))
3156 if (i+1 < argc) alias_arg = argv[++i];
3157 else exim_fail("exim: string expected after -oA\n");
3160 /* -oB: Set a connection message max value for remote deliveries */
3163 uschar * p = argrest;
3165 if (i+1 < argc && isdigit((argv[i+1][0])))
3169 connection_max_messages = 1;
3176 exim_fail("exim: number expected after -oB\n");
3177 connection_max_messages = Uatoi(p);
3182 /* -odb: background delivery */
3185 if (Ustrcmp(argrest, "b") == 0)
3187 f.synchronous_delivery = FALSE;
3188 arg_queue_only = FALSE;
3189 queue_only_set = TRUE;
3192 /* -odd: testsuite-only: add no inter-process delays */
3194 else if (Ustrcmp(argrest, "d") == 0)
3195 f.testsuite_delays = FALSE;
3197 /* -odf: foreground delivery (smail-compatible option); same effect as
3198 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3201 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3203 f.synchronous_delivery = TRUE;
3204 arg_queue_only = FALSE;
3205 queue_only_set = TRUE;
3208 /* -odq: queue only */
3210 else if (Ustrcmp(argrest, "q") == 0)
3212 f.synchronous_delivery = FALSE;
3213 arg_queue_only = TRUE;
3214 queue_only_set = TRUE;
3217 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3218 but no remote delivery */
3220 else if (Ustrcmp(argrest, "qs") == 0)
3222 f.queue_smtp = TRUE;
3223 arg_queue_only = FALSE;
3224 queue_only_set = TRUE;
3229 /* -oex: Sendmail error flags. As these are also accepted without the
3230 leading -o prefix, for compatibility with vacation and other callers,
3231 they are handled with -e above. */
3233 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3234 -oitrue: Another sendmail syntax for the same */
3237 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3242 /* -oM*: Set various characteristics for an incoming message; actually
3243 acted on for trusted callers only. */
3248 exim_fail("exim: data expected after -oM%s\n", argrest);
3250 /* -oMa: Set sender host address */
3252 if (Ustrcmp(argrest, "a") == 0)
3253 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3255 /* -oMaa: Set authenticator name */
3257 else if (Ustrcmp(argrest, "aa") == 0)
3258 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3260 /* -oMas: setting authenticated sender */
3262 else if (Ustrcmp(argrest, "as") == 0)
3263 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3265 /* -oMai: setting authenticated id */
3267 else if (Ustrcmp(argrest, "ai") == 0)
3268 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3270 /* -oMi: Set incoming interface address */
3272 else if (Ustrcmp(argrest, "i") == 0)
3273 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3275 /* -oMm: Message reference */
3277 else if (Ustrcmp(argrest, "m") == 0)
3279 if (!mac_ismsgid(argv[i+1]))
3280 exim_fail("-oMm must be a valid message ID\n");
3281 if (!f.trusted_config)
3282 exim_fail("-oMm must be called by a trusted user/config\n");
3283 message_reference = argv[++i];
3286 /* -oMr: Received protocol */
3288 else if (Ustrcmp(argrest, "r") == 0)
3290 if (received_protocol)
3291 exim_fail("received_protocol is set already\n");
3293 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3295 /* -oMs: Set sender host name */
3297 else if (Ustrcmp(argrest, "s") == 0)
3298 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3300 /* -oMt: Set sender ident */
3302 else if (Ustrcmp(argrest, "t") == 0)
3304 sender_ident_set = TRUE;
3305 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3308 /* Else a bad argument */
3315 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3316 seem to call this as -m (undocumented), so that is also accepted (see
3318 /* -oo: An ancient flag for old-style addresses which still seems to
3319 crop up in some calls (see in SCO). */
3323 if (*argrest) badarg = TRUE;
3326 /* -oP <name>: set pid file path for daemon
3327 -oPX: delete pid file of daemon */
3330 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3331 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3332 "(uid=%d euid=%d | %d)\n",
3333 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3334 if (!*argrest) override_pid_file_path = argv[++i];
3335 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3340 /* -or <n>: set timeout for non-SMTP acceptance
3341 -os <n>: set timeout for SMTP acceptance */
3346 int * tp = argrest[-1] == 'r'
3347 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3349 *tp = readconf_readtime(argrest, 0, FALSE);
3350 else if (i+1 < argc)
3351 *tp = readconf_readtime(argv[++i], 0, FALSE);
3354 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3358 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3359 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3362 if (*argrest) badarg = TRUE;
3363 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3366 /* -oY: Override creation of daemon notifier socket */
3369 if (*argrest) badarg = TRUE;
3370 else notifier_socket = NULL;
3373 /* Unknown -o argument */
3381 /* -ps: force Perl startup; -pd force delayed Perl startup */
3385 if (*argrest == 's' && argrest[1] == 0)
3387 perl_start_option = 1;
3390 if (*argrest == 'd' && argrest[1] == 0)
3392 perl_start_option = -1;
3397 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3398 which sets the host protocol and host name */
3401 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3405 uschar * hn = Ustrchr(argrest, ':');
3407 if (received_protocol)
3408 exim_fail("received_protocol is set already\n");
3411 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3414 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3415 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3416 sender_host_name = string_copy_taint(hn + 1, TRUE);
3423 receiving_message = FALSE;
3424 if (queue_interval >= 0)
3425 exim_fail("exim: -q specified more than once\n");
3427 /* -qq...: Do queue runs in a 2-stage manner */
3429 if (*argrest == 'q')
3431 f.queue_2stage = TRUE;
3435 /* -qi...: Do only first (initial) deliveries */
3437 if (*argrest == 'i')
3439 f.queue_run_first_delivery = TRUE;
3443 /* -qf...: Run the queue, forcing deliveries
3444 -qff..: Ditto, forcing thawing as well */
3446 if (*argrest == 'f')
3448 f.queue_run_force = TRUE;
3449 if (*++argrest == 'f')
3451 f.deliver_force_thaw = TRUE;
3456 /* -q[f][f]l...: Run the queue only on local deliveries */
3458 if (*argrest == 'l')
3460 f.queue_run_local = TRUE;
3464 /* -q[f][f][l][G<name>]... Work on the named queue */
3466 if (*argrest == 'G')
3469 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3470 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3471 queue_name = string_copyn(argrest, i);
3473 if (*argrest == '/') argrest++;
3476 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3477 only, optionally named, optionally starting from a given message id. */
3479 if (!(list_queue || count_queue))
3481 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3484 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3485 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3486 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3487 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3490 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3491 forced, optionally local only, optionally named. */
3493 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3495 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3499 case 'R': /* Synonymous with -qR... */
3501 const uschar *tainted_selectstr;
3503 receiving_message = FALSE;
3505 /* -Rf: As -R (below) but force all deliveries,
3506 -Rff: Ditto, but also thaw all frozen messages,
3507 -Rr: String is regex
3508 -Rrf: Regex and force
3509 -Rrff: Regex and force and thaw
3511 in all cases provided there are no further characters in this
3515 for (int i = 0; i < nelem(rsopts); i++)
3516 if (Ustrcmp(argrest, rsopts[i]) == 0)
3518 if (i != 2) f.queue_run_force = TRUE;
3519 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3520 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3521 argrest += Ustrlen(rsopts[i]);
3524 /* -R: Set string to match in addresses for forced queue run to
3525 pick out particular messages. */
3527 /* Avoid attacks from people providing very long strings, and do so before
3530 tainted_selectstr = argrest;
3531 else if (i+1 < argc)
3532 tainted_selectstr = argv[++i];
3534 exim_fail("exim: string expected after -R\n");
3535 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3539 /* -r: an obsolete synonym for -f (see above) */
3542 /* -S: Like -R but works on sender. */
3544 case 'S': /* Synonymous with -qS... */
3546 const uschar *tainted_selectstr;
3548 receiving_message = FALSE;
3550 /* -Sf: As -S (below) but force all deliveries,
3551 -Sff: Ditto, but also thaw all frozen messages,
3552 -Sr: String is regex
3553 -Srf: Regex and force
3554 -Srff: Regex and force and thaw
3556 in all cases provided there are no further characters in this
3560 for (int i = 0; i < nelem(rsopts); i++)
3561 if (Ustrcmp(argrest, rsopts[i]) == 0)
3563 if (i != 2) f.queue_run_force = TRUE;
3564 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3565 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3566 argrest += Ustrlen(rsopts[i]);
3569 /* -S: Set string to match in addresses for forced queue run to
3570 pick out particular messages. */
3573 tainted_selectstr = argrest;
3574 else if (i+1 < argc)
3575 tainted_selectstr = argv[++i];
3577 exim_fail("exim: string expected after -S\n");
3578 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3582 /* -Tqt is an option that is exclusively for use by the testing suite.
3583 It is not recognized in other circumstances. It allows for the setting up
3584 of explicit "queue times" so that various warning/retry things can be
3585 tested. Otherwise variability of clock ticks etc. cause problems. */
3588 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3589 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3594 /* -t: Set flag to extract recipients from body of message. */
3597 if (!*argrest) extract_recipients = TRUE;
3599 /* -ti: Set flag to extract recipients from body of message, and also
3600 specify that dot does not end the message. */
3602 else if (Ustrcmp(argrest, "i") == 0)
3604 extract_recipients = TRUE;
3608 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3611 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3618 /* -U: This means "initial user submission" in sendmail, apparently. The
3619 doc claims that in future sendmail may refuse syntactically invalid
3620 messages instead of fixing them. For the moment, we just ignore it. */
3626 /* -v: verify things - this is a very low-level debugging */
3631 debug_selector |= D_v;
3632 debug_file = stderr;
3638 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3640 The -x flag tells the sendmail command that mail from a local
3641 mail program has National Language Support (NLS) extended characters
3642 in the body of the mail item. The sendmail command can send mail with
3643 extended NLS characters across networks that normally corrupts these
3646 As Exim is 8-bit clean, it just ignores this flag. */
3649 if (*argrest) badarg = TRUE;
3652 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3653 logs to that file. We swallow the parameter and otherwise ignore it. */
3658 exim_fail("exim: string expected after -X\n");
3661 /* -z: a line of text to log */
3666 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3668 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3671 /* All other initial characters are errors */
3676 } /* End of high-level switch statement */
3678 /* Failed to recognize the option, or syntax error */
3681 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3682 "option %s\n", arg);
3686 /* If -R or -S have been specified without -q, assume a single queue run. */
3688 if ( (deliver_selectstring || deliver_selectstring_sender)
3689 && queue_interval < 0)
3694 store_pool = old_pool;
3697 /* If usage_wanted is set we call the usage function - which never returns */
3698 if (usage_wanted) exim_usage(called_as);
3700 /* Arguments have been processed. Check for incompatibilities. */
3701 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3702 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3703 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3704 || filter_test != FTEST_NONE
3705 || msg_action_arg > 0 && !one_msg_action
3707 || ( msg_action_arg > 0
3708 && ( f.daemon_listen || queue_interval > 0 || list_options
3709 || checking && msg_action != MSG_LOAD
3710 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3712 || ( (f.daemon_listen || queue_interval > 0)
3713 && ( sender_address || list_options || list_queue || checking
3716 || f.daemon_listen && queue_interval == 0
3717 || f.inetd_wait_mode && queue_interval >= 0
3719 && ( checking || smtp_input || extract_recipients
3720 || filter_test != FTEST_NONE || bi_option
3722 || ( verify_address_mode
3723 && ( f.address_test_mode || smtp_input || extract_recipients
3724 || filter_test != FTEST_NONE || bi_option
3726 || ( f.address_test_mode
3727 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3731 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3733 || deliver_selectstring && queue_interval < 0
3734 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3736 exim_fail("exim: incompatible command-line options or arguments\n");
3738 /* If debugging is set up, set the file and the file descriptor to pass on to
3739 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3740 to run in the foreground. */
3742 if (debug_selector != 0)
3744 debug_file = stderr;
3745 debug_fd = fileno(debug_file);
3746 f.background_daemon = FALSE;
3747 testharness_pause_ms(100); /* lets caller finish */
3748 if (debug_selector != D_v) /* -v only doesn't show this */
3750 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3751 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3753 if (!version_printed)
3754 show_whats_supported(stderr);
3758 /* When started with root privilege, ensure that the limits on the number of
3759 open files and the number of processes (where that is accessible) are
3760 sufficiently large, or are unset, in case Exim has been called from an
3761 environment where the limits are screwed down. Not all OS have the ability to
3762 change some of these limits. */
3766 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3772 #ifdef RLIMIT_NOFILE
3773 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3775 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3777 rlp.rlim_cur = rlp.rlim_max = 0;
3780 /* I originally chose 1000 as a nice big number that was unlikely to
3781 be exceeded. It turns out that some older OS have a fixed upper limit of
3784 if (rlp.rlim_cur < 1000)
3786 rlp.rlim_cur = rlp.rlim_max = 1000;
3787 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3789 rlp.rlim_cur = rlp.rlim_max = 256;
3790 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3791 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3798 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3800 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3802 rlp.rlim_cur = rlp.rlim_max = 0;
3805 # ifdef RLIM_INFINITY
3806 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3808 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3810 if (rlp.rlim_cur < 1000)
3812 rlp.rlim_cur = rlp.rlim_max = 1000;
3814 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3815 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3821 /* Exim is normally entered as root (but some special configurations are
3822 possible that don't do this). However, it always spins off sub-processes that
3823 set their uid and gid as required for local delivery. We don't want to pass on
3824 any extra groups that root may belong to, so we want to get rid of them all at
3827 We need to obey setgroups() at this stage, before possibly giving up root
3828 privilege for a changed configuration file, but later on we might need to
3829 check on the additional groups for the admin user privilege - can't do that
3830 till after reading the config, which might specify the exim gid. Therefore,
3831 save the group list here first. */
3833 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3834 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3836 /* There is a fundamental difference in some BSD systems in the matter of
3837 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3838 known not to be different. On the "different" systems there is a single group
3839 list, and the first entry in it is the current group. On all other versions of
3840 Unix there is a supplementary group list, which is in *addition* to the current
3841 group. Consequently, to get rid of all extraneous groups on a "standard" system
3842 you pass over 0 groups to setgroups(), while on a "different" system you pass
3843 over a single group - the current group, which is always the first group in the
3844 list. Calling setgroups() with zero groups on a "different" system results in
3845 an error return. The following code should cope with both types of system.
3847 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3848 the "setgroups() with zero groups" - and changes the egid.
3849 Thanks to that we had to stash the original_egid above, for use below
3850 in the call to exim_setugid().
3852 However, if this process isn't running as root, setgroups() can't be used
3853 since you have to be root to run it, even if throwing away groups.
3854 Except, sigh, for Hurd - where you can.
3855 Not being root here happens only in some unusual configurations. */
3858 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3859 && setgroups(0, NULL) != 0
3861 && setgroups(1, group_list) != 0)
3862 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3864 /* If the configuration file name has been altered by an argument on the
3865 command line (either a new file name or a macro definition) and the caller is
3866 not root, or if this is a filter testing run, remove any setuid privilege the
3867 program has and run as the underlying user.
3869 The exim user is locked out of this, which severely restricts the use of -C
3872 Otherwise, set the real ids to the effective values (should be root unless run
3873 from inetd, which it can either be root or the exim uid, if one is configured).
3875 There is a private mechanism for bypassing some of this, in order to make it
3876 possible to test lots of configurations automatically, without having either to
3877 recompile each time, or to patch in an actual configuration file name and other
3878 values (such as the path name). If running in the test harness, pretend that
3879 configuration file changes and macro definitions haven't happened. */
3882 (!f.trusted_config || /* Config changed, or */
3883 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3884 real_uid != root_uid && /* Not root, and */
3885 !f.running_in_test_harness /* Not fudged */
3887 expansion_test /* expansion testing */
3889 filter_test != FTEST_NONE) /* Filter testing */
3891 setgroups(group_count, group_list);
3892 exim_setugid(real_uid, real_gid, FALSE,
3893 US"-C, -D, -be or -bf forces real uid");
3894 removed_privilege = TRUE;
3896 /* In the normal case when Exim is called like this, stderr is available
3897 and should be used for any logging information because attempts to write
3898 to the log will usually fail. To arrange this, we unset really_exim. However,
3899 if no stderr is available there is no point - we might as well have a go
3900 at the log (if it fails, syslog will be written).
3902 Note that if the invoker is Exim, the logs remain available. Messing with
3903 this causes unlogged successful deliveries. */
3905 if (log_stderr && real_uid != exim_uid)
3906 f.really_exim = FALSE;
3909 /* Privilege is to be retained for the moment. It may be dropped later,
3910 depending on the job that this Exim process has been asked to do. For now, set
3911 the real uid to the effective so that subsequent re-execs of Exim are done by a
3915 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3917 /* If testing a filter, open the file(s) now, before wasting time doing other
3918 setups and reading the message. */
3920 if (filter_test & FTEST_SYSTEM)
3921 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3922 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3925 if (filter_test & FTEST_USER)
3926 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3927 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3930 /* Initialise lookup_list
3931 If debugging, already called above via version reporting.
3932 In either case, we initialise the list of available lookups while running
3933 as root. All dynamically modules are loaded from a directory which is
3934 hard-coded into the binary and is code which, if not a module, would be
3935 part of Exim already. Ability to modify the content of the directory
3936 is equivalent to the ability to modify a setuid binary!
3938 This needs to happen before we read the main configuration. */
3941 /*XXX this excrescence could move to the testsuite standard config setup file */
3943 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3946 /* Read the main runtime configuration data; this gives up if there
3947 is a failure. It leaves the configuration file open so that the subsequent
3948 configuration data for delivery can be read if needed.
3950 NOTE: immediately after opening the configuration file we change the working
3951 directory to "/"! Later we change to $spool_directory. We do it there, because
3952 during readconf_main() some expansion takes place already. */
3954 /* Store the initial cwd before we change directories. Can be NULL if the
3955 dir has already been unlinked. */
3956 initial_cwd = os_getcwd(NULL, 0);
3957 if (!initial_cwd && errno)
3958 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3960 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3961 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3964 -be[m] expansion test -
3965 -b[fF] filter test new
3967 -bmalware malware_test_file new
3969 -brw rewrite test new
3971 -bv[s] address verify -
3973 -bP <option> (except -bP config, which sets list_config)
3975 If any of these options is set, we suppress warnings about configuration
3976 issues (currently about tls_advertise_hosts and keep_environment not being
3980 int old_pool = store_pool;
3981 #ifdef MEASURE_TIMING
3982 struct timeval t0, diff;
3983 (void)gettimeofday(&t0, NULL);
3986 store_pool = POOL_CONFIG;
3987 readconf_main(checking || list_options);
3988 store_pool = old_pool;
3990 #ifdef MEASURE_TIMING
3991 report_time_since(&t0, US"readconf_main (delta)");
3995 /* Now in directory "/" */
3997 if (cleanup_environment() == FALSE)
3998 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
4001 /* If an action on specific messages is requested, or if a daemon or queue
4002 runner is being started, we need to know if Exim was called by an admin user.
4003 This is the case if the real user is root or exim, or if the real group is
4004 exim, or if one of the supplementary groups is exim or a group listed in
4005 admin_groups. We don't fail all message actions immediately if not admin_user,
4006 since some actions can be performed by non-admin users. Instead, set admin_user
4007 for later interrogation. */
4009 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
4010 f.admin_user = TRUE;
4012 for (int i = 0; i < group_count && !f.admin_user; i++)
4013 if (group_list[i] == exim_gid)
4014 f.admin_user = TRUE;
4015 else if (admin_groups)
4016 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
4017 if (admin_groups[j] == group_list[i])
4018 f.admin_user = TRUE;
4020 /* Another group of privileged users are the trusted users. These are root,
4021 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
4022 are permitted to specify sender_addresses with -f on the command line, and
4023 other message parameters as well. */
4025 if (real_uid == root_uid || real_uid == exim_uid)
4026 f.trusted_caller = TRUE;
4030 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
4031 if (trusted_users[i] == real_uid)
4032 f.trusted_caller = TRUE;
4035 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
4036 if (trusted_groups[i] == real_gid)
4037 f.trusted_caller = TRUE;
4038 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
4039 if (trusted_groups[i] == group_list[j])
4040 f.trusted_caller = TRUE;
4043 /* At this point, we know if the user is privileged and some command-line
4044 options become possibly impermissible, depending upon the configuration file. */
4046 if (checking && commandline_checks_require_admin && !f.admin_user)
4047 exim_fail("exim: those command-line flags are set to require admin\n");
4049 /* Handle the decoding of logging options. */
4051 decode_bits(log_selector, log_selector_size, log_notall,
4052 log_selector_string, log_options, log_options_count, US"log", 0);
4056 debug_printf("configuration file is %s\n", config_main_filename);
4057 debug_printf("log selectors =");
4058 for (int i = 0; i < log_selector_size; i++)
4059 debug_printf(" %08x", log_selector[i]);
4063 /* If domain literals are not allowed, check the sender address that was
4064 supplied with -f. Ditto for a stripped trailing dot. */
4068 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
4069 exim_fail("exim: bad -f address \"%s\": domain literals not "
4070 "allowed\n", sender_address);
4071 if (f_end_dot && !strip_trailing_dot)
4072 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
4073 "(trailing dot not allowed)\n", sender_address);
4076 /* See if an admin user overrode our logging. */
4078 if (cmdline_syslog_name)
4081 syslog_processname = cmdline_syslog_name;
4082 log_file_path = string_copy(CUS"syslog");
4085 /* not a panic, non-privileged users should not be able to spam paniclog */
4087 "exim: you lack sufficient privilege to specify syslog process name\n");
4089 /* Paranoia check of maximum lengths of certain strings. There is a check
4090 on the length of the log file path in log.c, which will come into effect
4091 if there are any calls to write the log earlier than this. However, if we
4092 get this far but the string is very long, it is better to stop now than to
4093 carry on and (e.g.) receive a message and then have to collapse. The call to
4094 log_write() from here will cause the ultimate panic collapse if the complete
4095 file name exceeds the buffer length. */
4097 if (Ustrlen(log_file_path) > 200)
4098 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4099 "log_file_path is longer than 200 chars: aborting");
4101 if (Ustrlen(pid_file_path) > 200)
4102 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4103 "pid_file_path is longer than 200 chars: aborting");
4105 if (Ustrlen(spool_directory) > 200)
4106 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4107 "spool_directory is longer than 200 chars: aborting");
4109 /* Length check on the process name given to syslog for its TAG field,
4110 which is only permitted to be 32 characters or less. See RFC 3164. */
4112 if (Ustrlen(syslog_processname) > 32)
4113 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4114 "syslog_processname is longer than 32 chars: aborting");
4119 log_write(0, LOG_MAIN, "%s", log_oneline);
4120 return EXIT_SUCCESS;
4123 return EXIT_FAILURE;
4125 /* In some operating systems, the environment variable TMPDIR controls where
4126 temporary files are created; Exim doesn't use these (apart from when delivering
4127 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4128 If TMPDIR is found in the environment, reset it to the value defined in the
4129 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4130 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4131 EXIM_TMPDIR by the build scripts.
4135 if (environ) for (uschar ** p = USS environ; *p; p++)
4136 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4138 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4139 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4141 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4145 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4146 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4147 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4148 called by a user who has set the TZ variable. This then affects the timestamps
4149 in log files and in Received: headers, and any created Date: header lines. The
4150 required timezone is settable in the configuration file, so nothing can be done
4151 about this earlier - but hopefully nothing will normally be logged earlier than
4152 this. We have to make a new environment if TZ is wrong, but don't bother if
4153 timestamps_utc is set, because then all times are in UTC anyway. */
4155 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4156 f.timestamps_utc = TRUE;
4159 uschar *envtz = US getenv("TZ");
4161 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4162 : timezone_string != NULL
4165 uschar **p = USS environ;
4169 if (environ) while (*p++) count++;
4170 if (!envtz) count++;
4171 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4172 if (environ) for (p = USS environ; *p; p++)
4173 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4174 if (timezone_string)
4176 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4177 sprintf(CS *newp++, "TZ=%s", timezone_string);
4182 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4183 tod_stamp(tod_log));
4187 /* Handle the case when we have removed the setuid privilege because of -C or
4188 -D. This means that the caller of Exim was not root.
4190 There is a problem if we were running as the Exim user. The sysadmin may
4191 expect this case to retain privilege because "the binary was called by the
4192 Exim user", but it hasn't, because either the -D option set macros, or the
4193 -C option set a non-trusted configuration file. There are two possibilities:
4195 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4196 to do message deliveries. Thus, the fact that it is running as a
4197 non-privileged user is plausible, and might be wanted in some special
4198 configurations. However, really_exim will have been set false when
4199 privilege was dropped, to stop Exim trying to write to its normal log
4200 files. Therefore, re-enable normal log processing, assuming the sysadmin
4201 has set up the log directory correctly.
4203 (2) If deliver_drop_privilege is not set, the configuration won't work as
4204 apparently intended, and so we log a panic message. In order to retain
4205 root for -C or -D, the caller must either be root or be invoking a
4206 trusted configuration file (when deliver_drop_privilege is false). */
4208 if ( removed_privilege
4209 && (!f.trusted_config || opt_D_used)
4210 && real_uid == exim_uid)
4211 if (deliver_drop_privilege)
4212 f.really_exim = TRUE; /* let logging work normally */
4214 log_write(0, LOG_MAIN|LOG_PANIC,
4215 "exim user lost privilege for using %s option",
4216 f.trusted_config? "-D" : "-C");
4218 /* Start up Perl interpreter if Perl support is configured and there is a
4219 perl_startup option, and the configuration or the command line specifies
4220 initializing starting. Note that the global variables are actually called
4221 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4224 if (perl_start_option != 0)
4225 opt_perl_at_start = (perl_start_option > 0);
4226 if (opt_perl_at_start && opt_perl_startup != NULL)
4229 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4230 if ((errstr = init_perl(opt_perl_startup)))
4231 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4232 opt_perl_started = TRUE;
4234 #endif /* EXIM_PERL */
4236 /* Log the arguments of the call if the configuration file said so. This is
4237 a debugging feature for finding out what arguments certain MUAs actually use.
4238 Don't attempt it if logging is disabled, or if listing variables or if
4239 verifying/testing addresses or expansions. */
4241 if ( (debug_selector & D_any || LOGGING(arguments))
4242 && f.really_exim && !list_options && !checking)
4244 uschar *p = big_buffer;
4245 Ustrcpy(p, US"cwd= (failed)");
4252 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4253 p += Ustrlen(CCS p);
4256 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4258 for (int i = 0; i < argc; i++)
4260 int len = Ustrlen(argv[i]);
4261 const uschar *printing;
4263 if (p + len + 8 >= big_buffer + big_buffer_size)
4265 Ustrcpy(p, US" ...");
4266 log_write(0, LOG_MAIN, "%s", big_buffer);
4267 Ustrcpy(big_buffer, US"...");
4270 printing = string_printing(argv[i]);
4271 if (!*printing) quote = US"\"";
4274 const uschar *pp = printing;
4276 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4278 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4279 (p - big_buffer) - 4), printing, quote);
4282 if (LOGGING(arguments))
4283 log_write(0, LOG_MAIN, "%s", big_buffer);
4285 debug_printf("%s\n", big_buffer);
4288 /* Set the working directory to be the top-level spool directory. We don't rely
4289 on this in the code, which always uses fully qualified names, but it's useful
4290 for core dumps etc. Don't complain if it fails - the spool directory might not
4291 be generally accessible and calls with the -C option (and others) have lost
4292 privilege by now. Before the chdir, we try to ensure that the directory exists.
4295 if (Uchdir(spool_directory) != 0)
4297 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4298 (void) Uchdir(spool_directory);
4301 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4302 alias file. Exim doesn't have such a concept, but this call is screwed into
4303 Sun's YP makefiles. Handle this by calling a configured script, as the real
4304 user who called Exim. The -oA option can be used to pass an argument to the
4309 (void) fclose(config_file);
4310 if (bi_command && *bi_command)
4314 argv[i++] = bi_command;
4315 if (alias_arg) argv[i++] = alias_arg;
4318 setgroups(group_count, group_list);
4319 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4321 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4322 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4324 execv(CS argv[0], (char *const *)argv);
4325 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4329 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4334 /* We moved the admin/trusted check to be immediately after reading the
4335 configuration file. We leave these prints here to ensure that syslog setup,
4336 logfile setup, and so on has already happened. */
4338 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4339 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4341 /* Only an admin user may start the daemon or force a queue run in the default
4342 configuration, but the queue run restriction can be relaxed. Only an admin
4343 user may request that a message be returned to its sender forthwith. Only an
4344 admin user may specify a debug level greater than D_v (because it might show
4345 passwords, etc. in lookup queries). Only an admin user may request a queue
4346 count. Only an admin user can use the test interface to scan for email
4347 (because Exim will be in the spool dir and able to look at mails). */
4351 BOOL debugset = (debug_selector & ~D_v) != 0;
4352 if ( deliver_give_up || f.daemon_listen || malware_test_file
4353 || count_queue && queue_list_requires_admin
4354 || list_queue && queue_list_requires_admin
4355 || queue_interval >= 0 && prod_requires_admin
4356 || queue_name_dest && prod_requires_admin
4357 || debugset && !f.running_in_test_harness
4359 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4362 /* If the real user is not root or the exim uid, the argument for passing
4363 in an open TCP/IP connection for another message is not permitted, nor is
4364 running with the -N option for any delivery action, unless this call to exim is
4365 one that supplied an input message, or we are using a patched exim for
4366 regression testing. */
4368 if ( real_uid != root_uid && real_uid != exim_uid
4369 && ( continue_hostname
4371 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4373 && !f.running_in_test_harness
4375 exim_fail("exim: Permission denied\n");
4377 /* If the caller is not trusted, certain arguments are ignored when running for
4378 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4379 Note that authority for performing certain actions on messages is tested in the
4380 queue_action() function. */
4382 if (!f.trusted_caller && !checking)
4384 sender_host_name = sender_host_address = interface_address =
4385 sender_ident = received_protocol = NULL;
4386 sender_host_port = interface_port = 0;
4387 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4390 /* If a sender host address is set, extract the optional port number off the
4391 end of it and check its syntax. Do the same thing for the interface address.
4392 Exim exits if the syntax is bad. */
4396 if (sender_host_address)
4397 sender_host_port = check_port(sender_host_address);
4398 if (interface_address)
4399 interface_port = check_port(interface_address);
4402 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4405 if (f.trusted_caller)
4407 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4408 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4411 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4414 /* If an SMTP message is being received check to see if the standard input is a
4415 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4416 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4421 union sockaddr_46 inetd_sock;
4422 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4423 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4425 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4426 if (family == AF_INET || family == AF_INET6)
4428 union sockaddr_46 interface_sock;
4429 size = sizeof(interface_sock);
4431 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4432 interface_address = host_ntoa(-1, &interface_sock, NULL,
4435 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4437 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4440 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4441 NULL, &sender_host_port);
4442 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4443 "inetd is not supported when mua_wrapper is set");
4447 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4452 /* If the load average is going to be needed while receiving a message, get it
4453 now for those OS that require the first call to os_getloadavg() to be done as
4454 root. There will be further calls later for each message received. */
4456 #ifdef LOAD_AVG_NEEDS_ROOT
4457 if ( receiving_message
4458 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4459 load_average = OS_GETLOADAVG();
4462 /* The queue_only configuration option can be overridden by -odx on the command
4463 line, except that if queue_only_override is false, queue_only cannot be unset
4464 from the command line. */
4466 if (queue_only_set && (queue_only_override || arg_queue_only))
4467 queue_only = arg_queue_only;
4469 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4472 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4473 if (arg_smtp_receive_timeout >= 0)
4474 smtp_receive_timeout = arg_smtp_receive_timeout;
4476 /* If Exim was started with root privilege, unless we have already removed the
4477 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4478 except when starting the daemon or doing some kind of delivery or address
4479 testing (-bt). These are the only cases when root need to be retained. We run
4480 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4481 retained only for starting the daemon. We always do the initgroups() in this
4482 situation (controlled by the TRUE below), in order to be as close as possible
4483 to the state Exim usually runs in. */
4485 if ( !unprivileged /* originally had root AND */
4486 && !removed_privilege /* still got root AND */
4487 && !f.daemon_listen /* not starting the daemon */
4488 && queue_interval <= 0 /* (either kind of daemon) */
4489 && ( /* AND EITHER */
4490 deliver_drop_privilege /* requested unprivileged */
4492 queue_interval < 0 /* not running the queue */
4493 && ( msg_action_arg < 0 /* and */
4494 || msg_action != MSG_DELIVER /* not delivering */
4496 && (!checking || !f.address_test_mode) /* not address checking */
4497 && !rcpt_verify_quota /* and not quota checking */
4499 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4501 /* When we are retaining a privileged uid, we still change to the exim gid. */
4506 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4507 rv = setgid(exim_gid);
4508 /* Impact of failure is that some stuff might end up with an incorrect group.
4509 We track this for failures from root, since any attempt to change privilege
4510 by root should succeed and failures should be examined. For non-root,
4511 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4512 no need to complain then. */
4514 if (!(unprivileged || removed_privilege))
4515 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4518 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4519 (long int)exim_gid, strerror(errno));
4523 /* Handle a request to scan a file for malware */
4524 if (malware_test_file)
4526 #ifdef WITH_CONTENT_SCAN
4528 set_process_info("scanning file for malware");
4529 if ((result = malware_in_file(malware_test_file)) == FAIL)
4531 printf("No malware found.\n");
4536 printf("Malware lookup returned non-okay/fail: %d\n", result);
4540 printf("Malware found: %s\n", malware_name);
4542 printf("Malware scan detected malware of unknown name.\n");
4544 printf("Malware scanning not enabled at compile time.\n");
4549 /* Handle a request to list the delivery queue */
4553 set_process_info("listing the queue");
4554 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4558 /* Handle a request to count the delivery queue */
4562 set_process_info("counting the queue");
4563 fprintf(stdout, "%u\n", queue_count());
4567 /* Handle actions on specific messages, except for the force delivery and
4568 message load actions, which are done below. Some actions take a whole list of
4569 message ids, which are known to continue up to the end of the arguments. Others
4570 take a single message id and then operate on the recipients list. */
4572 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4574 int yield = EXIT_SUCCESS;
4575 set_process_info("acting on specified messages");
4577 /* ACL definitions may be needed when removing a message (-Mrm) because
4578 event_action gets expanded */
4580 if (msg_action == MSG_REMOVE)
4582 int old_pool = store_pool;
4583 store_pool = POOL_CONFIG;
4585 store_pool = old_pool;
4586 store_writeprotect(POOL_CONFIG);
4589 if (!one_msg_action)
4591 for (i = msg_action_arg; i < argc; i++)
4592 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4593 yield = EXIT_FAILURE;
4596 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4597 default: printf("\n"); break;
4601 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4602 recipients_arg)) yield = EXIT_FAILURE;
4606 /* We used to set up here to skip reading the ACL section, on
4607 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4608 Now, since the intro of the ${acl } expansion, ACL definitions may be
4609 needed in transports so we lost the optimisation. */
4612 int old_pool = store_pool;
4613 #ifdef MEASURE_TIMING
4614 struct timeval t0, diff;
4615 (void)gettimeofday(&t0, NULL);
4618 store_pool = POOL_CONFIG;
4620 store_pool = old_pool;
4622 /* -be can add macro definitions, needing to link to the macro structure
4623 chain. Otherwise, make the memory used for config data readonly. */
4625 if (!expansion_test)
4626 store_writeprotect(POOL_CONFIG);
4628 #ifdef MEASURE_TIMING
4629 report_time_since(&t0, US"readconf_rest (delta)");
4633 /* Handle a request to check quota */
4634 if (rcpt_verify_quota)
4635 if (real_uid != root_uid && real_uid != exim_uid)
4636 exim_fail("exim: Permission denied\n");
4637 else if (recipients_arg >= argc)
4638 exim_fail("exim: missing recipient for quota check\n");
4641 verify_quota(argv[recipients_arg]);
4642 exim_exit(EXIT_SUCCESS);
4645 /* Handle the -brt option. This is for checking out retry configurations.
4646 The next three arguments are a domain name or a complete address, and
4647 optionally two error numbers. All it does is to call the function that
4648 scans the retry configuration data. */
4650 if (test_retry_arg >= 0)
4652 retry_config *yield;
4653 int basic_errno = 0;
4655 const uschar *s1, *s2;
4657 if (test_retry_arg >= argc)
4659 printf("-brt needs a domain or address argument\n");
4660 exim_exit(EXIT_FAILURE);
4662 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4665 /* If the first argument contains no @ and no . it might be a local user
4666 or it might be a single-component name. Treat as a domain. */
4668 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4670 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4671 "being \ntreated as a one-component domain, not as a local part.\n\n",
4675 /* There may be an optional second domain arg. */
4677 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4678 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4680 /* The final arg is an error name */
4682 if (test_retry_arg < argc)
4684 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4686 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4689 printf("%s\n", CS error);
4690 return EXIT_FAILURE;
4693 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4694 code > 100 as an error is for matching codes to the decade. Turn them into
4695 a real error code, off the decade. */
4697 if (basic_errno == ERRNO_MAIL4XX ||
4698 basic_errno == ERRNO_RCPT4XX ||
4699 basic_errno == ERRNO_DATA4XX)
4701 int code = (more_errno >> 8) & 255;
4703 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4704 else if (code > 100)
4705 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4709 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4710 printf("No retry information found\n");
4713 more_errno = yield->more_errno;
4714 printf("Retry rule: %s ", yield->pattern);
4716 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4718 printf("quota%s%s ",
4719 (more_errno > 0)? "_" : "",
4720 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4722 else if (yield->basic_errno == ECONNREFUSED)
4724 printf("refused%s%s ",
4725 (more_errno > 0)? "_" : "",
4726 (more_errno == 'M')? "MX" :
4727 (more_errno == 'A')? "A" : "");
4729 else if (yield->basic_errno == ETIMEDOUT)
4732 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4734 if (more_errno != 0) printf("_%s",
4735 (more_errno == 'M')? "MX" : "A");
4738 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4739 printf("auth_failed ");
4742 for (retry_rule * r = yield->rules; r; r = r->next)
4744 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4745 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4751 printf(",%d.", x/1000);
4765 exim_exit(EXIT_SUCCESS);
4768 /* Handle a request to list one or more configuration options */
4769 /* If -n was set, we suppress some information */
4774 set_process_info("listing variables");
4775 if (recipients_arg >= argc)
4776 fail = !readconf_print(US"all", NULL, flag_n);
4777 else for (i = recipients_arg; i < argc; i++)
4780 (Ustrcmp(argv[i], "router") == 0 ||
4781 Ustrcmp(argv[i], "transport") == 0 ||
4782 Ustrcmp(argv[i], "authenticator") == 0 ||
4783 Ustrcmp(argv[i], "macro") == 0 ||
4784 Ustrcmp(argv[i], "environment") == 0))
4786 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4790 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4792 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4797 set_process_info("listing config");
4798 exim_exit(readconf_print(US"config", NULL, flag_n)
4799 ? EXIT_SUCCESS : EXIT_FAILURE);
4803 /* Initialise subsystems as required. */
4807 /* Handle a request to deliver one or more messages that are already on the
4808 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4809 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4811 Delivery of specific messages is typically used for a small number when
4812 prodding by hand (when the option forced_delivery will be set) or when
4813 re-execing to regain root privilege. Each message delivery must happen in a
4814 separate process, so we fork a process for each one, and run them sequentially
4815 so that debugging output doesn't get intertwined, and to avoid spawning too
4816 many processes if a long list is given. However, don't fork for the last one;
4817 this saves a process in the common case when Exim is called to deliver just one
4820 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4822 if (prod_requires_admin && !f.admin_user)
4824 fprintf(stderr, "exim: Permission denied\n");
4825 exim_exit(EXIT_FAILURE);
4827 set_process_info("delivering specified messages");
4828 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4829 for (i = msg_action_arg; i < argc; i++)
4833 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4834 that runs into a later copy into the untainted global message_id[] */
4835 /*XXX Do we need a length limit check here? */
4837 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4838 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4840 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4841 exim_underbar_exit(EXIT_SUCCESS);
4845 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4847 exim_exit(EXIT_FAILURE);
4851 exim_exit(EXIT_SUCCESS);
4855 /* If only a single queue run is requested, without SMTP listening, we can just
4856 turn into a queue runner, with an optional starting message id. */
4858 if (queue_interval == 0 && !f.daemon_listen)
4860 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4861 start_queue_run_id ? US" starting at " : US"",
4862 start_queue_run_id ? start_queue_run_id: US"",
4863 stop_queue_run_id ? US" stopping at " : US"",
4864 stop_queue_run_id ? stop_queue_run_id : US"");
4866 set_process_info("running the '%s' queue (single queue run)", queue_name);
4868 set_process_info("running the queue (single queue run)");
4869 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4870 exim_exit(EXIT_SUCCESS);
4874 /* Find the login name of the real user running this process. This is always
4875 needed when receiving a message, because it is written into the spool file. It
4876 may also be used to construct a from: or a sender: header, and in this case we
4877 need the user's full name as well, so save a copy of it, checked for RFC822
4878 syntax and munged if necessary, if it hasn't previously been set by the -F
4879 argument. We may try to get the passwd entry more than once, in case NIS or
4880 other delays are in evidence. Save the home directory for use in filter testing
4885 if ((pw = getpwuid(real_uid)) != NULL)
4887 originator_login = string_copy(US pw->pw_name);
4888 originator_home = string_copy(US pw->pw_dir);
4890 /* If user name has not been set by -F, set it from the passwd entry
4891 unless -f has been used to set the sender address by a trusted user. */
4893 if (!originator_name)
4895 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4897 uschar *name = US pw->pw_gecos;
4898 uschar *amp = Ustrchr(name, '&');
4901 /* Most Unix specify that a '&' character in the gecos field is
4902 replaced by a copy of the login name, and some even specify that
4903 the first character should be upper cased, so that's what we do. */
4908 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4909 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4910 buffer[loffset] = toupper(buffer[loffset]);
4914 /* If a pattern for matching the gecos field was supplied, apply
4915 it and then expand the name string. */
4917 if (gecos_pattern && gecos_name)
4919 const pcre2_code *re;
4920 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4922 if (regex_match_and_setup(re, name, 0, -1))
4924 uschar *new_name = expand_string(gecos_name);
4928 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4929 "gecos field \"%s\"\n", new_name, name);
4932 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4933 "\"%s\": %s\n", gecos_name, expand_string_message);
4935 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4936 "gecos field \"%s\"\n", gecos_pattern, name);
4937 store_free((void *)re);
4939 originator_name = string_copy(name);
4942 /* A trusted caller has used -f but not -F */
4944 else originator_name = US"";
4947 /* Break the retry loop */
4952 if (++i > finduser_retries) break;
4956 /* If we cannot get a user login, log the incident and give up, unless the
4957 configuration specifies something to use. When running in the test harness,
4958 any setting of unknown_login overrides the actual name. */
4960 if (!originator_login || f.running_in_test_harness)
4964 originator_login = expand_string(unknown_login);
4965 if (!originator_name && unknown_username)
4966 originator_name = expand_string(unknown_username);
4967 if (!originator_name) originator_name = US"";
4969 if (!originator_login)
4970 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4974 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4977 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4979 /* If a message is created by this call of Exim, the uid/gid of its originator
4980 are those of the caller. These values are overridden if an existing message is
4981 read in from the spool. */
4983 originator_uid = real_uid;
4984 originator_gid = real_gid;
4986 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4987 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4989 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4990 returns. We leave this till here so that the originator_ fields are available
4991 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4994 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4998 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4999 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
5000 "mua_wrapper is set");
5003 # ifndef DISABLE_TLS
5004 /* This also checks that the library linkage is working and we can call
5005 routines in it, so call even if tls_require_ciphers is unset */
5007 # ifdef MEASURE_TIMING
5008 struct timeval t0, diff;
5009 (void)gettimeofday(&t0, NULL);
5011 if (!tls_dropprivs_validate_require_cipher(FALSE))
5013 # ifdef MEASURE_TIMING
5014 report_time_since(&t0, US"validate_ciphers (delta)");
5022 /* If the sender ident has not been set (by a trusted caller) set it to
5023 the caller. This will get overwritten below for an inetd call. If a trusted
5024 caller has set it empty, unset it. */
5026 if (!sender_ident) sender_ident = originator_login;
5027 else if (!*sender_ident) sender_ident = NULL;
5029 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
5030 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
5031 originator_* variables set. */
5033 if (test_rewrite_arg >= 0)
5035 f.really_exim = FALSE;
5036 if (test_rewrite_arg >= argc)
5038 printf("-brw needs an address argument\n");
5039 exim_exit(EXIT_FAILURE);
5041 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
5042 exim_exit(EXIT_SUCCESS);
5045 /* A locally-supplied message is considered to be coming from a local user
5046 unless a trusted caller supplies a sender address with -f, or is passing in the
5047 message via SMTP (inetd invocation or otherwise). */
5049 if ( !sender_address && !smtp_input
5050 || !f.trusted_caller && filter_test == FTEST_NONE)
5052 f.sender_local = TRUE;
5054 /* A trusted caller can supply authenticated_sender and authenticated_id
5055 via -oMas and -oMai and if so, they will already be set. Otherwise, force
5056 defaults except when host checking. */
5058 if (!authenticated_sender && !host_checking)
5059 authenticated_sender = string_sprintf("%s@%s", originator_login,
5060 qualify_domain_sender);
5061 if (!authenticated_id && !host_checking)
5062 authenticated_id = originator_login;
5065 /* Trusted callers are always permitted to specify the sender address.
5066 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
5067 is specified is the empty address. However, if a trusted caller does not
5068 specify a sender address for SMTP input, we leave sender_address unset. This
5069 causes the MAIL commands to be honoured. */
5071 if ( !smtp_input && !sender_address
5072 || !receive_check_set_sender(sender_address))
5074 /* Either the caller is not permitted to set a general sender, or this is
5075 non-SMTP input and the trusted caller has not set a sender. If there is no
5076 sender, or if a sender other than <> is set, override with the originator's
5077 login (which will get qualified below), except when checking things. */
5079 if ( !sender_address /* No sender_address set */
5081 (sender_address[0] != 0 && /* Non-empty sender address, AND */
5082 !checking)) /* Not running tests, including filter tests */
5084 sender_address = originator_login;
5085 f.sender_address_forced = FALSE;
5086 sender_address_domain = 0;
5090 /* Remember whether an untrusted caller set the sender address */
5092 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5094 /* Ensure that the sender address is fully qualified unless it is the empty
5095 address, which indicates an error message, or doesn't exist (root caller, smtp
5096 interface, no -f argument). */
5098 if (sender_address && *sender_address && sender_address_domain == 0)
5099 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5100 qualify_domain_sender);
5102 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5104 /* Handle a request to verify a list of addresses, or test them for delivery.
5105 This must follow the setting of the sender address, since routers can be
5106 predicated upon the sender. If no arguments are given, read addresses from
5107 stdin. Set debug_level to at least D_v to get full output for address testing.
5110 if (verify_address_mode || f.address_test_mode)
5113 int flags = vopt_qualify;
5115 if (verify_address_mode)
5117 if (!verify_as_sender) flags |= vopt_is_recipient;
5118 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5123 flags |= vopt_is_recipient;
5124 debug_selector |= D_v;
5125 debug_file = stderr;
5126 debug_fd = fileno(debug_file);
5127 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5130 if (recipients_arg < argc)
5131 while (recipients_arg < argc)
5133 /* Supplied addresses are tainted since they come from a user */
5134 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5137 BOOL finished = FALSE;
5138 uschar *ss = parse_find_address_end(s, FALSE);
5139 if (*ss == ',') *ss = 0; else finished = TRUE;
5140 test_address(s, flags, &exit_value);
5143 while (*++s == ',' || isspace(*s)) ;
5149 uschar * s = get_stdinput(NULL, NULL);
5151 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5155 exim_exit(exit_value);
5158 /* Handle expansion checking. Either expand items on the command line, or read
5159 from stdin if there aren't any. If -Mset was specified, load the message so
5160 that its variables can be used, but restrict this facility to admin users.
5161 Otherwise, if -bem was used, read a message from stdin. */
5165 dns_init(FALSE, FALSE, FALSE);
5166 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5170 exim_fail("exim: permission denied\n");
5171 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5172 /* Checking the length of the ID is sufficient to validate it.
5173 Get an untainted version so file opens can be done. */
5174 message_id = string_copy_taint(message_id, FALSE);
5176 spoolname = string_sprintf("%s-H", message_id);
5177 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5178 printf ("Failed to load message datafile %s\n", message_id);
5179 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5180 printf ("Failed to load message %s\n", message_id);
5183 /* Read a test message from a file. We fudge it up to be on stdin, saving
5184 stdin itself for later reading of expansion strings. */
5186 else if (expansion_test_message)
5188 int save_stdin = dup(0);
5189 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5191 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5194 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5195 message_ended = END_NOTENDED;
5196 read_message_body(receive_msg(extract_recipients));
5197 message_linecount += body_linecount;
5198 (void)dup2(save_stdin, 0);
5199 (void)close(save_stdin);
5200 clearerr(stdin); /* Required by Darwin */
5203 /* Only admin users may see config-file macros this way */
5205 if (!f.admin_user) macros_user = macros = mlast = NULL;
5207 /* Allow $recipients for this testing */
5209 f.enable_dollar_recipients = TRUE;
5211 /* Expand command line items */
5213 if (recipients_arg < argc)
5214 while (recipients_arg < argc)
5215 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5221 char *(*fn_readline)(const char *) = NULL;
5222 void (*fn_addhist)(const char *) = NULL;
5226 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5229 while (s = get_stdinput(fn_readline, fn_addhist))
5230 expansion_test_line(s);
5233 if (dlhandle) dlclose(dlhandle);
5237 /* The data file will be open after -Mset */
5239 if (deliver_datafile >= 0)
5241 (void)close(deliver_datafile);
5242 deliver_datafile = -1;
5245 exim_exit(EXIT_SUCCESS);
5249 /* The active host name is normally the primary host name, but it can be varied
5250 for hosts that want to play several parts at once. We need to ensure that it is
5251 set for host checking, and for receiving messages. */
5253 smtp_active_hostname = primary_hostname;
5254 if (raw_active_hostname != NULL)
5256 uschar *nah = expand_string(raw_active_hostname);
5259 if (!f.expand_string_forcedfail)
5260 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5261 "(smtp_active_hostname): %s", raw_active_hostname,
5262 expand_string_message);
5264 else if (nah[0] != 0) smtp_active_hostname = nah;
5267 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5268 given IP address so that the blocking and relay configuration can be tested.
5269 Unless a sender_ident was set by -oMt, we discard it (the default is the
5270 caller's login name). An RFC 1413 call is made only if we are running in the
5271 test harness and an incoming interface and both ports are specified, because
5272 there is no TCP/IP call to find the ident for. */
5279 if (!sender_ident_set)
5281 sender_ident = NULL;
5282 if (f.running_in_test_harness && sender_host_port
5283 && interface_address && interface_port)
5284 verify_get_ident(1223); /* note hardwired port number */
5287 /* In case the given address is a non-canonical IPv6 address, canonicalize
5288 it. The code works for both IPv4 and IPv6, as it happens. */
5290 size = host_aton(sender_host_address, x);
5291 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5292 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5294 /* Now set up for testing */
5296 host_build_sender_fullhost();
5300 f.sender_local = FALSE;
5301 f.sender_host_notsocket = TRUE;
5302 debug_file = stderr;
5303 debug_fd = fileno(debug_file);
5304 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5305 "**** but without any ident (RFC 1413) callback.\n"
5306 "**** This is not for real!\n\n",
5307 sender_host_address);
5309 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5310 if (verify_check_host(&hosts_connection_nolog) == OK)
5311 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5312 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5314 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5315 because a log line has already been written for all its failure exists
5316 (usually "connection refused: <reason>") and writing another one is
5317 unnecessary clutter. */
5319 if (smtp_start_session())
5322 for (; (reset_point = store_mark()); store_reset(reset_point))
5324 if (smtp_setup_msg() <= 0) break;
5325 if (!receive_msg(FALSE)) break;
5327 return_path = sender_address = NULL;
5328 dnslist_domain = dnslist_matched = NULL;
5329 #ifndef DISABLE_DKIM
5330 dkim_cur_signer = NULL;
5333 deliver_localpart_orig = NULL;
5334 deliver_domain_orig = NULL;
5335 callout_address = sending_ip_address = NULL;
5336 deliver_localpart_data = deliver_domain_data =
5337 recipient_data = sender_data = NULL;
5338 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5342 exim_exit(EXIT_SUCCESS);
5346 /* Arrange for message reception if recipients or SMTP were specified;
5347 otherwise complain unless a version print (-bV) happened or this is a filter
5348 verification test or info dump.
5349 In the former case, show the configuration file name. */
5351 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5353 if (version_printed)
5355 if (Ustrchr(config_main_filelist, ':'))
5356 printf("Configuration file search path is %s\n", config_main_filelist);
5357 printf("Configuration file is %s\n", config_main_filename);
5358 return EXIT_SUCCESS;
5361 if (info_flag != CMDINFO_NONE)
5363 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5364 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5367 if (filter_test == FTEST_NONE)
5368 exim_usage(called_as);
5372 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5373 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5374 that we are not called from inetd, because that is rejected above. The
5375 following configuration settings are forced here:
5377 (1) Synchronous delivery (-odi)
5378 (2) Errors to stderr (-oep == -oeq)
5379 (3) No parallel remote delivery
5380 (4) Unprivileged delivery
5382 We don't force overall queueing options because there are several of them;
5383 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5384 to override any SMTP queueing. */
5388 f.synchronous_delivery = TRUE;
5389 arg_error_handling = ERRORS_STDERR;
5390 remote_max_parallel = 1;
5391 deliver_drop_privilege = TRUE;
5392 f.queue_smtp = FALSE;
5393 queue_smtp_domains = NULL;
5395 message_utf8_downconvert = -1; /* convert-if-needed */
5400 /* Prepare to accept one or more new messages on the standard input. When a
5401 message has been read, its id is returned in message_id[]. If doing immediate
5402 delivery, we fork a delivery process for each received message, except for the
5403 last one, where we can save a process switch.
5405 It is only in non-smtp mode that error_handling is allowed to be changed from
5406 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5407 sendmail error modes other than -oem ever actually used? Later: yes.) */
5409 if (!smtp_input) error_handling = arg_error_handling;
5411 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5412 logging being sent down the socket and make an identd call to get the
5415 else if (f.is_inetd)
5417 (void)fclose(stderr);
5418 exim_nullstd(); /* Re-open to /dev/null */
5419 verify_get_ident(IDENT_PORT);
5420 host_build_sender_fullhost();
5421 set_process_info("handling incoming connection from %s via inetd",
5425 /* If the sender host address has been set, build sender_fullhost if it hasn't
5426 already been done (which it will have been for inetd). This caters for the
5427 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5428 so that the test for IP options is skipped for -bs input. */
5430 if (sender_host_address && !sender_fullhost)
5432 host_build_sender_fullhost();
5433 set_process_info("handling incoming connection from %s via -oMa",
5435 f.sender_host_notsocket = TRUE;
5438 /* Otherwise, set the sender host as unknown except for inetd calls. This
5439 prevents host checking in the case of -bs not from inetd and also for -bS. */
5441 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5443 /* If stdout does not exist, then dup stdin to stdout. This can happen
5444 if exim is started from inetd. In this case fd 0 will be set to the socket,
5445 but fd 1 will not be set. This also happens for passed SMTP channels. */
5447 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5449 /* Set up the incoming protocol name and the state of the program. Root is
5450 allowed to force received protocol via the -oMr option above. If we have come
5451 via inetd, the process info has already been set up. We don't set
5452 received_protocol here for smtp input, as it varies according to
5453 batch/HELO/EHLO/AUTH/TLS. */
5457 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5458 smtp_batched_input? "batched " : "",
5459 sender_address ? sender_address : originator_login);
5463 int old_pool = store_pool;
5464 store_pool = POOL_PERM;
5465 if (!received_protocol)
5466 received_protocol = string_sprintf("local%s", called_as);
5467 store_pool = old_pool;
5468 set_process_info("accepting a local non-SMTP message from <%s>",
5472 /* Initialize the session_local_queue-only flag (this will be ignored if
5473 mua_wrapper is set) */
5476 session_local_queue_only = queue_only;
5478 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5479 the spool if so configured. On failure, we must not attempt to send an error
5480 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5481 error code is given.) */
5483 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5484 exim_fail("exim: insufficient disk space\n");
5486 /* If this is smtp input of any kind, real or batched, handle the start of the
5489 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5490 because a log line has already been written for all its failure exists
5491 (usually "connection refused: <reason>") and writing another one is
5492 unnecessary clutter. */
5498 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5499 if (verify_check_host(&hosts_connection_nolog) == OK)
5500 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5501 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5502 if (!smtp_start_session())
5505 exim_exit(EXIT_SUCCESS);
5509 /* Otherwise, set up the input size limit here and set no stdin stdio buffer
5510 (we handle buferring so as to have visibility of fill level). */
5514 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5515 if (expand_string_message)
5516 if (thismessage_size_limit == -1)
5517 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5518 "message_size_limit: %s", expand_string_message);
5520 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5521 "message_size_limit: %s", expand_string_message);
5523 setvbuf(stdin, NULL, _IONBF, 0);
5526 /* Loop for several messages when reading SMTP input. If we fork any child
5527 processes, we don't want to wait for them unless synchronous delivery is
5528 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5529 same as SIG_DFL, despite the fact that documentation often lists the default as
5530 "ignore". This is a confusing area. This is what I know:
5532 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5533 processes that complete simply to go away without ever becoming defunct. You
5534 can't then wait for them - but we don't want to wait for them in the
5535 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5536 happen for all OS (e.g. *BSD is different).
5538 But that's not the end of the story. Some (many? all?) systems have the
5539 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5540 has by default, so it seems that the difference is merely one of default
5541 (compare restarting vs non-restarting signals).
5543 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5544 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5545 of the loop below. Paranoia rules.
5547 February 2003: That's *still* not the end of the story. There are now versions
5548 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5549 process then calls waitpid(), a grumble is written to the system log, because
5550 this is logically inconsistent. In other words, it doesn't like the paranoia.
5551 As a consequence of this, the waitpid() below is now excluded if we are sure
5552 that SIG_IGN works. */
5554 if (!f.synchronous_delivery)
5557 struct sigaction act;
5558 act.sa_handler = SIG_IGN;
5559 sigemptyset(&(act.sa_mask));
5560 act.sa_flags = SA_NOCLDWAIT;
5561 sigaction(SIGCHLD, &act, NULL);
5563 signal(SIGCHLD, SIG_IGN);
5567 /* Save the current store pool point, for resetting at the start of
5568 each message, and save the real sender address, if any. */
5570 real_sender_address = sender_address;
5572 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5573 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5576 for (BOOL more = TRUE; more; )
5578 rmark reset_point = store_mark();
5581 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5582 input and build the recipients list, before calling receive_msg() to read the
5583 message proper. Whatever sender address is given in the SMTP transaction is
5584 often ignored for local senders - we use the actual sender, which is normally
5585 either the underlying user running this process or a -f argument provided by
5586 a trusted caller. It is saved in real_sender_address. The test for whether to
5587 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5592 if ((rc = smtp_setup_msg()) > 0)
5594 if (real_sender_address != NULL &&
5595 !receive_check_set_sender(sender_address))
5597 sender_address = raw_sender = real_sender_address;
5598 sender_address_unrewritten = NULL;
5601 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5602 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5603 the very end. The result of the ACL is ignored (as for other non-SMTP
5604 messages). It is run for its potential side effects. */
5606 if (smtp_batched_input && acl_not_smtp_start != NULL)
5608 uschar *user_msg, *log_msg;
5609 f.enable_dollar_recipients = TRUE;
5610 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5611 &user_msg, &log_msg);
5612 f.enable_dollar_recipients = FALSE;
5615 /* Now get the data for the message */
5617 more = receive_msg(extract_recipients);
5620 cancel_cutthrough_connection(TRUE, US"receive dropped");
5621 if (more) goto MORELOOP;
5622 smtp_log_no_mail(); /* Log no mail if configured */
5623 exim_exit(EXIT_FAILURE);
5628 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5629 smtp_log_no_mail(); /* Log no mail if configured */
5630 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5634 /* In the non-SMTP case, we have all the information from the command
5635 line, but must process it in case it is in the more general RFC822
5636 format, and in any case, to detect syntax errors. Also, it appears that
5637 the use of comma-separated lists as single arguments is common, so we
5638 had better support them. */
5643 int count = argc - recipients_arg;
5644 uschar **list = argv + recipients_arg;
5646 /* These options cannot be changed dynamically for non-SMTP messages */
5648 f.active_local_sender_retain = local_sender_retain;
5649 f.active_local_from_check = local_from_check;
5651 /* Save before any rewriting */
5653 raw_sender = string_copy(sender_address);
5655 /* Loop for each argument (supplied by user hence tainted) */
5657 for (int i = 0; i < count; i++)
5659 int start, end, domain;
5661 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5662 * We'll still want to cap it to something, just in case. */
5663 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5665 /* Loop for each comma-separated address */
5669 BOOL finished = FALSE;
5671 uschar *ss = parse_find_address_end(s, FALSE);
5673 if (*ss == ',') *ss = 0; else finished = TRUE;
5675 /* Check max recipients - if -t was used, these aren't recipients */
5677 if (recipients_max > 0 && ++rcount > recipients_max &&
5678 !extract_recipients)
5679 if (error_handling == ERRORS_STDERR)
5681 fprintf(stderr, "exim: too many recipients\n");
5682 exim_exit(EXIT_FAILURE);
5686 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5687 errors_sender_rc : EXIT_FAILURE;
5691 BOOL b = allow_utf8_domains;
5692 allow_utf8_domains = TRUE;
5695 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5699 if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
5700 else allow_utf8_domains = b;
5705 if (domain == 0 && !f.allow_unqualified_recipient)
5708 errmess = US"unqualified recipient address not allowed";
5712 if (error_handling == ERRORS_STDERR)
5714 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5715 string_printing(list[i]), errmess);
5716 exim_exit(EXIT_FAILURE);
5722 eblock.text1 = string_printing(list[i]);
5723 eblock.text2 = errmess;
5725 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5726 errors_sender_rc : EXIT_FAILURE;
5729 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5732 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5736 /* Show the recipients when debugging */
5740 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5741 if (recipients_list)
5743 debug_printf("Recipients:\n");
5744 for (int i = 0; i < recipients_count; i++)
5745 debug_printf(" %s\n", recipients_list[i].address);
5749 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5750 ignored; rejecting here would just add complication, and it can just as
5751 well be done later. Allow $recipients to be visible in the ACL. */
5753 if (acl_not_smtp_start)
5755 uschar *user_msg, *log_msg;
5756 f.enable_dollar_recipients = TRUE;
5757 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5758 &user_msg, &log_msg);
5759 f.enable_dollar_recipients = FALSE;
5762 /* Pause for a while waiting for input. If none received in that time,
5763 close the logfile, if we had one open; then if we wait for a long-running
5764 datasource (months, in one use-case) log rotation will not leave us holding
5767 if (!receive_timeout)
5768 if (poll_one_fd(0, POLLIN, 30*60*1000) == 0) /* 30 minutes */
5771 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5772 will just read the headers for the message, and not write anything onto the
5775 message_ended = END_NOTENDED;
5776 more = receive_msg(extract_recipients);
5778 /* more is always FALSE here (not SMTP message) when reading a message
5779 for real; when reading the headers of a message for filter testing,
5780 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5782 if (!message_id[0]) exim_exit(EXIT_FAILURE);
5783 } /* Non-SMTP message reception */
5785 /* If this is a filter testing run, there are headers in store, but
5786 no message on the spool. Run the filtering code in testing mode, setting
5787 the domain to the qualify domain and the local part to the current user,
5788 unless they have been set by options. The prefix and suffix are left unset
5789 unless specified. The the return path is set to to the sender unless it has
5790 already been set from a return-path header in the message. */
5792 if (filter_test != FTEST_NONE)
5794 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5795 deliver_domain_orig = deliver_domain;
5796 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5797 deliver_localpart_orig = deliver_localpart;
5798 deliver_localpart_prefix = US ftest_prefix;
5799 deliver_localpart_suffix = US ftest_suffix;
5800 deliver_home = originator_home;
5804 printf("Return-path copied from sender\n");
5805 return_path = string_copy(sender_address);
5808 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5809 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5811 receive_add_recipient(
5812 string_sprintf("%s%s%s@%s",
5813 ftest_prefix ? ftest_prefix : US"",
5815 ftest_suffix ? ftest_suffix : US"",
5816 deliver_domain), -1);
5818 printf("Recipient = %s\n", recipients_list[0].address);
5819 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5820 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5822 if (chdir("/")) /* Get away from wherever the user is running this from */
5824 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5825 exim_exit(EXIT_FAILURE);
5828 /* Now we run either a system filter test, or a user filter test, or both.
5829 In the latter case, headers added by the system filter will persist and be
5830 available to the user filter. We need to copy the filter variables
5833 if (filter_test & FTEST_SYSTEM)
5834 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5835 exim_exit(EXIT_FAILURE);
5837 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5839 if (filter_test & FTEST_USER)
5840 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5841 exim_exit(EXIT_FAILURE);
5843 exim_exit(EXIT_SUCCESS);
5846 /* Else act on the result of message reception. We should not get here unless
5847 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5848 will be TRUE. If it is not, check on the number of messages received in this
5851 if ( !session_local_queue_only
5852 && smtp_accept_queue_per_connection > 0
5853 && receive_messagecount > smtp_accept_queue_per_connection)
5855 session_local_queue_only = TRUE;
5856 queue_only_reason = 2;
5859 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5860 and queue_only_load is set, check that the load average is below it. If it is
5861 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5862 default), we put the whole session into queue_only mode. It then remains this
5863 way for any subsequent messages on the same SMTP connection. This is a
5864 deliberate choice; even though the load average may fall, it doesn't seem
5865 right to deliver later messages on the same call when not delivering earlier
5866 ones. However, there are odd cases where this is not wanted, so this can be
5867 changed by setting queue_only_load_latch false. */
5869 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5870 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5872 queue_only_reason = 3;
5873 if (queue_only_load_latch) session_local_queue_only = TRUE;
5876 /* If running as an MUA wrapper, all queueing options and freezing options
5880 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5882 /* Log the queueing here, when it will get a message id attached, but
5883 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5886 if (local_queue_only)
5888 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5889 switch(queue_only_reason)
5892 log_write(L_delay_delivery,
5893 LOG_MAIN, "no immediate delivery: more than %d messages "
5894 "received in one connection", smtp_accept_queue_per_connection);
5898 log_write(L_delay_delivery,
5899 LOG_MAIN, "no immediate delivery: load average %.2f",
5900 (double)load_average/1000.0);
5905 else if (f.queue_only_policy || f.deliver_freeze)
5906 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5908 /* Else do the delivery unless the ACL or local_scan() called for queue only
5909 or froze the message. Always deliver in a separate process. A fork failure is
5910 not a disaster, as the delivery will eventually happen on a subsequent queue
5911 run. The search cache must be tidied before the fork, as the parent will
5912 do it before exiting. The child will trigger a lookup failure and
5913 thereby defer the delivery if it tries to use (for example) a cached ldap
5914 connection that the parent has called unbind on. */
5921 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5924 close_unwanted(); /* Close unwanted file descriptors and TLS */
5925 exim_nullstd(); /* Ensure std{in,out,err} exist */
5927 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5928 mode, deliver_drop_privilege is forced TRUE). */
5930 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5932 delivery_re_exec(CEE_EXEC_EXIT);
5933 /* Control does not return here. */
5936 /* No need to re-exec */
5938 rc = deliver_message(message_id, FALSE, FALSE);
5940 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5941 ? EXIT_SUCCESS : EXIT_FAILURE);
5946 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5947 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5948 "process: %s", strerror(errno));
5952 release_cutthrough_connection(US"msg passed for delivery");
5954 /* In the parent, wait if synchronous delivery is required. This will
5955 always be the case in MUA wrapper mode. */
5957 if (f.synchronous_delivery)
5960 while (wait(&status) != pid);
5961 if ((status & 0x00ff) != 0)
5962 log_write(0, LOG_MAIN|LOG_PANIC,
5963 "process %d crashed with signal %d while delivering %s",
5964 (int)pid, status & 0x00ff, message_id);
5965 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5970 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5971 automatically reaps children (see comments above the loop), clear away any
5972 finished subprocesses here, in case there are lots of messages coming in
5973 from the same source. */
5975 #ifndef SIG_IGN_WORKS
5976 while (waitpid(-1, NULL, WNOHANG) > 0);
5980 return_path = sender_address = NULL;
5981 authenticated_sender = NULL;
5982 deliver_localpart_orig = NULL;
5983 deliver_domain_orig = NULL;
5984 deliver_host = deliver_host_address = NULL;
5985 dnslist_domain = dnslist_matched = NULL;
5986 #ifdef WITH_CONTENT_SCAN
5987 malware_name = NULL;
5989 callout_address = NULL;
5990 sending_ip_address = NULL;
5991 deliver_localpart_data = deliver_domain_data =
5992 recipient_data = sender_data = NULL;
5994 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5996 store_reset(reset_point);
5999 exim_exit(EXIT_SUCCESS); /* Never returns */
6000 return 0; /* To stop compiler warning */