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 *))
1432 if (!fn_readline) { printf("> "); fflush(stdout); }
1434 for (int i = 0;; i++)
1436 uschar buffer[1024];
1440 char *readline_line = NULL;
1443 if (!(readline_line = fn_readline((i > 0)? "":"> "))) break;
1444 if (*readline_line != 0 && fn_addhist) fn_addhist(readline_line);
1445 p = US readline_line;
1450 /* readline() not in use */
1453 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1457 /* Handle the line */
1459 ss = p + (int)Ustrlen(p);
1460 while (ss > p && isspace(ss[-1])) ss--;
1463 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1465 g = string_catn(g, p, ss - p);
1468 if (fn_readline) free(readline_line);
1471 /* g can only be NULL if ss==p */
1472 if (ss == p || g->s[g->ptr-1] != '\\')
1476 (void) string_from_gstring(g);
1479 if (!g) printf("\n");
1480 return string_from_gstring(g);
1485 /*************************************************
1486 * Output usage information for the program *
1487 *************************************************/
1489 /* This function is called when there are no recipients
1490 or a specific --help argument was added.
1493 progname information on what name we were called by
1495 Returns: DOES NOT RETURN
1499 exim_usage(uschar *progname)
1502 /* Handle specific program invocation variants */
1503 if (Ustrcmp(progname, US"-mailq") == 0)
1505 "mailq - list the contents of the mail queue\n\n"
1506 "For a list of options, see the Exim documentation.\n");
1508 /* Generic usage - we output this whatever happens */
1510 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1511 "not directly from a shell command line. Options and/or arguments control\n"
1512 "what it does when called. For a list of options, see the Exim documentation.\n");
1517 /*************************************************
1518 * Validate that the macros given are okay *
1519 *************************************************/
1521 /* Typically, Exim will drop privileges if macros are supplied. In some
1522 cases, we want to not do so.
1524 Arguments: opt_D_used - true if the commandline had a "-D" option
1525 Returns: true if trusted, false otherwise
1529 macros_trusted(BOOL opt_D_used)
1531 #ifdef WHITELIST_D_MACROS
1532 uschar *whitelisted, *end, *p, **whites;
1533 int white_count, i, n;
1535 BOOL prev_char_item, found;
1540 #ifndef WHITELIST_D_MACROS
1544 /* We only trust -D overrides for some invoking users:
1545 root, the exim run-time user, the optional config owner user.
1546 I don't know why config-owner would be needed, but since they can own the
1547 config files anyway, there's no security risk to letting them override -D. */
1548 if ( ! ((real_uid == root_uid)
1549 || (real_uid == exim_uid)
1550 #ifdef CONFIGURE_OWNER
1551 || (real_uid == config_uid)
1555 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1559 /* Get a list of macros which are whitelisted */
1560 whitelisted = string_copy_perm(US WHITELIST_D_MACROS, FALSE);
1561 prev_char_item = FALSE;
1563 for (p = whitelisted; *p != '\0'; ++p)
1565 if (*p == ':' || isspace(*p))
1570 prev_char_item = FALSE;
1573 if (!prev_char_item)
1574 prev_char_item = TRUE;
1581 whites = store_malloc(sizeof(uschar *) * (white_count+1));
1582 for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1587 if (i == white_count)
1589 while (*p != '\0' && p < end)
1595 /* The list of commandline macros should be very short.
1596 Accept the N*M complexity. */
1597 for (macro_item * m = macros_user; m; m = m->next) if (m->command_line)
1600 for (uschar ** w = whites; *w; ++w)
1601 if (Ustrcmp(*w, m->name) == 0)
1608 if (!m->replacement)
1610 if ((len = m->replen) == 0)
1612 if (!regex_match(regex_whitelisted_macro, m->replacement, len, NULL))
1615 DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
1621 /*************************************************
1622 * Expansion testing *
1623 *************************************************/
1625 /* Expand and print one item, doing macro-processing.
1628 item line for expansion
1632 expansion_test_line(const uschar * line)
1638 Ustrncpy(big_buffer, line, big_buffer_size);
1639 big_buffer[big_buffer_size-1] = '\0';
1640 len = Ustrlen(big_buffer);
1642 (void) macros_expand(0, &len, &dummy_macexp);
1644 if (isupper(big_buffer[0]))
1646 if (macro_read_assignment(big_buffer))
1647 printf("Defined macro '%s'\n", mlast->name);
1650 if ((s = expand_string(big_buffer))) printf("%s\n", CS s);
1651 else printf("Failed: %s\n", expand_string_message);
1656 /*************************************************
1657 * Entry point and high-level code *
1658 *************************************************/
1660 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1661 the appropriate action. All the necessary functions are present in the one
1662 binary. I originally thought one should split it up, but it turns out that so
1663 much of the apparatus is needed in each chunk that one might as well just have
1664 it all available all the time, which then makes the coding easier as well.
1667 argc count of entries in argv
1668 argv argument strings, with argv[0] being the program name
1670 Returns: EXIT_SUCCESS if terminated successfully
1671 EXIT_FAILURE otherwise, except when a message has been sent
1672 to the sender, and -oee was given
1676 main(int argc, char **cargv)
1678 uschar **argv = USS cargv;
1679 int arg_receive_timeout = -1;
1680 int arg_smtp_receive_timeout = -1;
1681 int arg_error_handling = error_handling;
1682 int filter_sfd = -1;
1683 int filter_ufd = -1;
1686 int list_queue_option = 0;
1688 int msg_action_arg = -1;
1689 int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1690 int queue_only_reason = 0;
1692 int perl_start_option = 0;
1694 int recipients_arg = argc;
1695 int sender_address_domain = 0;
1696 int test_retry_arg = -1;
1697 int test_rewrite_arg = -1;
1698 gid_t original_egid;
1699 BOOL arg_queue_only = FALSE;
1700 BOOL bi_option = FALSE;
1701 BOOL checking = FALSE;
1702 BOOL count_queue = FALSE;
1703 BOOL expansion_test = FALSE;
1704 BOOL extract_recipients = FALSE;
1705 BOOL flag_G = FALSE;
1706 BOOL flag_n = FALSE;
1707 BOOL forced_delivery = FALSE;
1708 BOOL f_end_dot = FALSE;
1709 BOOL deliver_give_up = FALSE;
1710 BOOL list_queue = FALSE;
1711 BOOL list_options = FALSE;
1712 BOOL list_config = FALSE;
1713 BOOL local_queue_only;
1714 BOOL one_msg_action = FALSE;
1715 BOOL opt_D_used = FALSE;
1716 BOOL queue_only_set = FALSE;
1717 BOOL receiving_message = TRUE;
1718 BOOL sender_ident_set = FALSE;
1719 BOOL session_local_queue_only;
1721 BOOL removed_privilege = FALSE;
1722 BOOL usage_wanted = FALSE;
1723 BOOL verify_address_mode = FALSE;
1724 BOOL verify_as_sender = FALSE;
1725 BOOL rcpt_verify_quota = FALSE;
1726 BOOL version_printed = FALSE;
1727 uschar *alias_arg = NULL;
1728 uschar *called_as = US"";
1729 uschar *cmdline_syslog_name = NULL;
1730 uschar *start_queue_run_id = NULL;
1731 uschar *stop_queue_run_id = NULL;
1732 uschar *expansion_test_message = NULL;
1733 const uschar *ftest_domain = NULL;
1734 const uschar *ftest_localpart = NULL;
1735 const uschar *ftest_prefix = NULL;
1736 const uschar *ftest_suffix = NULL;
1737 uschar *log_oneline = NULL;
1738 uschar *malware_test_file = NULL;
1739 uschar *real_sender_address;
1740 uschar *originator_home = US"/";
1744 struct stat statbuf;
1745 pid_t passed_qr_pid = (pid_t)0;
1746 int passed_qr_pipe = -1;
1747 gid_t group_list[EXIM_GROUPLIST_SIZE];
1749 /* For the -bI: flag */
1750 enum commandline_info info_flag = CMDINFO_NONE;
1751 BOOL info_stdout = FALSE;
1753 /* Possible options for -R and -S */
1755 static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1757 /* Need to define this in case we need to change the environment in order
1758 to get rid of a bogus time zone. We have to make it char rather than uschar
1759 because some OS define it in /usr/include/unistd.h. */
1761 extern char **environ;
1763 #ifdef MEASURE_TIMING
1764 (void)gettimeofday(×tamp_startup, NULL);
1767 store_init(); /* Initialise the memory allocation susbsystem */
1768 pcre_init(); /* Set up memory handling for pcre */
1770 /* If the Exim user and/or group and/or the configuration file owner/group were
1771 defined by ref:name at build time, we must now find the actual uid/gid values.
1772 This is a feature to make the lives of binary distributors easier. */
1774 #ifdef EXIM_USERNAME
1775 if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1778 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME);
1780 /* If ref:name uses a number as the name, route_finduser() returns
1781 TRUE with exim_uid set and pw coerced to NULL. */
1783 exim_gid = pw->pw_gid;
1784 #ifndef EXIM_GROUPNAME
1787 "exim: ref:name should specify a usercode, not a group.\n"
1788 "exim: can't let you get away with it unless you also specify a group.\n");
1792 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME);
1795 #ifdef EXIM_GROUPNAME
1796 if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1797 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME);
1800 #ifdef CONFIGURE_OWNERNAME
1801 if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1802 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1803 CONFIGURE_OWNERNAME);
1806 /* We default the system_filter_user to be the Exim run-time user, as a
1807 sane non-root value. */
1808 system_filter_uid = exim_uid;
1810 #ifdef CONFIGURE_GROUPNAME
1811 if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1812 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1813 CONFIGURE_GROUPNAME);
1816 /* In the Cygwin environment, some initialization used to need doing.
1817 It was fudged in by means of this macro; now no longer but we'll leave
1818 it in case of others. */
1824 /* Check a field which is patched when we are running Exim within its
1825 testing harness; do a fast initial check, and then the whole thing. */
1827 f.running_in_test_harness =
1828 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1829 if (f.running_in_test_harness)
1832 /* Protect against abusive argv[0] */
1833 exim_str_fail_toolong(argv[0], PATH_MAX, "argv[0]");
1835 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1836 at the start of a program; however, it seems that some environments do not
1837 follow this. A "strange" locale can affect the formatting of timestamps, so we
1840 setlocale(LC_ALL, "C");
1842 /* Get the offset between CLOCK_MONOTONIC/CLOCK_BOOTTIME and wallclock */
1844 #ifdef _POSIX_MONOTONIC_CLOCK
1848 /* Set up the default handler for timing using alarm(). */
1850 os_non_restarting_signal(SIGALRM, sigalrm_handler);
1852 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1853 because store_malloc writes a log entry on failure. */
1855 if (!(log_buffer = US malloc(LOG_BUFFER_SIZE)))
1856 exim_fail("exim: failed to get store for log buffer\n");
1858 /* Initialize the default log options. */
1860 bits_set(log_selector, log_selector_size, log_default);
1862 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1863 NULL when the daemon is run and the file is closed. We have to use this
1864 indirection, because some systems don't allow writing to the variable "stderr".
1867 if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1869 /* Ensure there is a big buffer for temporary use in several places. It is put
1870 in malloc store so that it can be freed for enlargement if necessary. */
1872 big_buffer = store_malloc(big_buffer_size);
1874 /* Set up the handler for the data request signal, and set the initial
1875 descriptive text. */
1877 process_info = store_get(PROCESS_INFO_SIZE, TRUE); /* tainted */
1878 set_process_info("initializing");
1879 os_restarting_signal(SIGUSR1, usr1_handler); /* exiwhat */
1882 struct sigaction act = { .sa_sigaction = segv_handler, .sa_flags = SA_RESETHAND | SA_SIGINFO };
1883 sigaction(SIGSEGV, &act, NULL);
1886 signal(SIGSEGV, segv_handler); /* log faults */
1889 /* If running in a dockerized environment, the TERM signal is only
1890 delegated to the PID 1 if we request it by setting an signal handler */
1891 if (getpid() == 1) signal(SIGTERM, term_handler);
1893 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1894 in the daemon code. For the rest of Exim's uses, we ignore it. */
1896 signal(SIGHUP, SIG_IGN);
1898 /* We don't want to die on pipe errors as the code is written to handle
1899 the write error instead. */
1901 signal(SIGPIPE, SIG_IGN);
1903 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1904 set to SIG_IGN. This causes subprocesses that complete before the parent
1905 process waits for them not to hang around, so when Exim calls wait(), nothing
1906 is there. The wait() code has been made robust against this, but let's ensure
1907 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1908 ending status. We use sigaction rather than plain signal() on those OS where
1909 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1910 problem on AIX with this.) */
1914 struct sigaction act;
1915 act.sa_handler = SIG_DFL;
1916 sigemptyset(&(act.sa_mask));
1918 sigaction(SIGCHLD, &act, NULL);
1921 signal(SIGCHLD, SIG_DFL);
1924 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1929 /* Set up the version number. Set up the leading 'E' for the external form of
1930 message ids, set the pointer to the internal form, and initialize it to
1931 indicate no message being processed. */
1934 message_id_option[0] = '-';
1935 message_id_external = message_id_option + 1;
1936 message_id_external[0] = 'E';
1937 message_id = message_id_external + 1;
1940 /* Set the umask to zero so that any files Exim creates using open() are
1941 created with the modes that it specifies. NOTE: Files created with fopen() have
1942 a problem, which was not recognized till rather late (February 2006). With this
1943 umask, such files will be world writeable. (They are all content scanning files
1944 in the spool directory, which isn't world-accessible, so this is not a
1945 disaster, but it's untidy.) I don't want to change this overall setting,
1946 however, because it will interact badly with the open() calls. Instead, there's
1947 now a function called modefopen() that fiddles with the umask while calling
1952 /* Precompile the regular expression for matching a message id. Keep this in
1953 step with the code that generates ids in the accept.c module. We need to do
1954 this here, because the -M options check their arguments for syntactic validity
1955 using mac_ismsgid, which uses this. */
1958 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1960 /* Precompile the regular expression that is used for matching an SMTP error
1961 code, possibly extended, at the start of an error message. Note that the
1962 terminating whitespace character is included. */
1965 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1968 #ifdef WHITELIST_D_MACROS
1969 /* Precompile the regular expression used to filter the content of macros
1970 given to -D for permissibility. */
1972 regex_whitelisted_macro =
1973 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1976 for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1978 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1979 this seems to be a generally accepted convention, since one finds symbolic
1980 links called "mailq" in standard OS configurations. */
1982 if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1983 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1986 receiving_message = FALSE;
1987 called_as = US"-mailq";
1990 /* If the program is called as "rmail" treat it as equivalent to
1991 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1992 i.e. preventing a single dot on a line from terminating the message, and
1993 returning with zero return code, even in cases of error (provided an error
1994 message has been sent). */
1996 if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1997 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
2000 called_as = US"-rmail";
2001 errors_sender_rc = EXIT_SUCCESS;
2004 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
2005 this is a smail convention. */
2007 if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
2008 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
2010 smtp_input = smtp_batched_input = TRUE;
2011 called_as = US"-rsmtp";
2014 /* If the program is called as "runq" treat it as equivalent to "exim -q";
2015 this is a smail convention. */
2017 if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
2018 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
2021 receiving_message = FALSE;
2022 called_as = US"-runq";
2025 /* If the program is called as "newaliases" treat it as equivalent to
2026 "exim -bi"; this is a sendmail convention. */
2028 if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
2029 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
2032 receiving_message = FALSE;
2033 called_as = US"-newaliases";
2036 /* Save the original effective uid for a couple of uses later. It should
2037 normally be root, but in some esoteric environments it may not be. */
2039 original_euid = geteuid();
2040 original_egid = getegid();
2042 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
2043 to be the same as the real ones. This makes a difference only if Exim is setuid
2044 (or setgid) to something other than root, which could be the case in some
2045 special configurations. */
2047 real_uid = getuid();
2048 real_gid = getgid();
2050 if (real_uid == root_uid)
2052 if ((rv = setgid(real_gid)))
2053 exim_fail("exim: setgid(%ld) failed: %s\n",
2054 (long int)real_gid, strerror(errno));
2055 if ((rv = setuid(real_uid)))
2056 exim_fail("exim: setuid(%ld) failed: %s\n",
2057 (long int)real_uid, strerror(errno));
2060 /* If neither the original real uid nor the original euid was root, Exim is
2061 running in an unprivileged state. */
2063 unprivileged = (real_uid != root_uid && original_euid != root_uid);
2065 /* For most of the args-parsing we need to use permanent pool memory */
2067 int old_pool = store_pool;
2068 store_pool = POOL_PERM;
2070 /* Scan the program's arguments. Some can be dealt with right away; others are
2071 simply recorded for checking and handling afterwards. Do a high-level switch
2072 on the second character (the one after '-'), to save some effort. */
2074 for (i = 1; i < argc; i++)
2076 BOOL badarg = FALSE;
2077 uschar * arg = argv[i];
2081 /* An argument not starting with '-' is the start of a recipients list;
2082 break out of the options-scanning loop. */
2090 /* An option consisting of -- terminates the options */
2092 if (Ustrcmp(arg, "--") == 0)
2094 recipients_arg = i + 1;
2098 /* Handle flagged options */
2100 switchchar = arg[1];
2103 /* Make all -ex options synonymous with -oex arguments, since that
2104 is assumed by various callers. Also make -qR options synonymous with -R
2105 options, as that seems to be required as well. Allow for -qqR too, and
2106 the same for -S options. */
2108 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
2109 Ustrncmp(arg+1, "qR", 2) == 0 ||
2110 Ustrncmp(arg+1, "qS", 2) == 0)
2112 switchchar = arg[2];
2115 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
2117 switchchar = arg[3];
2119 f.queue_2stage = TRUE;
2122 /* Make -r synonymous with -f, since it is a documented alias */
2124 else if (arg[1] == 'r') switchchar = 'f';
2126 /* Make -ov synonymous with -v */
2128 else if (Ustrcmp(arg, "-ov") == 0)
2134 /* deal with --option_aliases */
2135 else if (switchchar == '-')
2137 if (Ustrcmp(argrest, "help") == 0)
2139 usage_wanted = TRUE;
2142 else if (Ustrcmp(argrest, "version") == 0)
2149 /* High-level switch on active initial letter */
2154 /* sendmail uses -Ac and -Am to control which .cf file is used;
2157 if (!*argrest) { badarg = TRUE; break; }
2160 BOOL ignore = FALSE;
2165 if (*(argrest + 1) == '\0')
2169 if (!ignore) badarg = TRUE;
2173 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
2174 so has no need of it. */
2177 if (!*argrest) i++; /* Skip over the type */
2183 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
2187 /* -bd: Run in daemon mode, awaiting SMTP connections.
2188 -bdf: Ditto, but in the foreground.
2191 f.daemon_listen = TRUE;
2192 if (*argrest == 'f') f.background_daemon = FALSE;
2193 else if (*argrest) badarg = TRUE;
2196 /* -be: Run in expansion test mode
2197 -bem: Ditto, but read a message from a file first
2200 expansion_test = checking = TRUE;
2201 if (*argrest == 'm')
2203 if (++i >= argc) { badarg = TRUE; break; }
2204 expansion_test_message = argv[i];
2207 if (*argrest) badarg = TRUE;
2210 /* -bF: Run system filter test */
2212 filter_test |= checking = FTEST_SYSTEM;
2213 if (*argrest) badarg = TRUE;
2214 else if (++i < argc) filter_test_sfile = argv[i];
2215 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2218 /* -bf: Run user filter test
2219 -bfd: Set domain for filter testing
2220 -bfl: Set local part for filter testing
2221 -bfp: Set prefix for filter testing
2222 -bfs: Set suffix for filter testing
2227 filter_test |= checking = FTEST_USER;
2228 if (++i < argc) filter_test_ufile = argv[i];
2229 else exim_fail("exim: file name expected after %s\n", argv[i-1]);
2234 exim_fail("exim: string expected after %s\n", arg);
2235 if (Ustrcmp(argrest, "d") == 0) ftest_domain = exim_str_fail_toolong(argv[i], EXIM_DOMAINNAME_MAX, "-bfd");
2236 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfl");
2237 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfp");
2238 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = exim_str_fail_toolong(argv[i], EXIM_LOCALPART_MAX, "-bfs");
2243 /* -bh: Host checking - an IP address must follow. */
2245 if (!*argrest || Ustrcmp(argrest, "c") == 0)
2247 if (++i >= argc) { badarg = TRUE; break; }
2248 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-bh"), TRUE);
2249 host_checking = checking = f.log_testing_mode = TRUE;
2250 f.host_checking_callout = *argrest == 'c';
2251 message_logs = FALSE;
2256 /* -bi: This option is used by sendmail to initialize *the* alias file,
2257 though it has the -oA option to specify a different file. Exim has no
2258 concept of *the* alias file, but since Sun's YP make script calls
2259 sendmail this way, some support must be provided. */
2261 if (!*argrest) bi_option = TRUE;
2265 /* -bI: provide information, of the type to follow after a colon.
2266 This is an Exim flag. */
2268 if (Ustrlen(argrest) >= 1 && *argrest == ':')
2270 uschar *p = argrest+1;
2271 info_flag = CMDINFO_HELP;
2273 if (strcmpic(p, CUS"sieve") == 0)
2275 info_flag = CMDINFO_SIEVE;
2278 else if (strcmpic(p, CUS"dscp") == 0)
2280 info_flag = CMDINFO_DSCP;
2283 else if (strcmpic(p, CUS"help") == 0)
2289 /* -bm: Accept and deliver message - the default option. Reinstate
2290 receiving_message, which got turned off for all -b options.
2291 -bmalware: test the filename given for malware */
2293 if (!*argrest) receiving_message = TRUE;
2294 else if (Ustrcmp(argrest, "alware") == 0)
2296 if (++i >= argc) { badarg = TRUE; break; }
2298 malware_test_file = argv[i];
2303 /* -bnq: For locally originating messages, do not qualify unqualified
2304 addresses. In the envelope, this causes errors; in header lines they
2307 if (Ustrcmp(argrest, "q") == 0)
2309 f.allow_unqualified_sender = FALSE;
2310 f.allow_unqualified_recipient = FALSE;
2315 /* -bpxx: List the contents of the mail queue, in various forms. If
2316 the option is -bpc, just a queue count is needed. Otherwise, if the
2317 first letter after p is r, then order is random. */
2319 if (*argrest == 'c')
2322 if (*++argrest) badarg = TRUE;
2326 if (*argrest == 'r')
2328 list_queue_option = 8;
2331 else list_queue_option = 0;
2335 /* -bp: List the contents of the mail queue, top-level only */
2339 /* -bpu: List the contents of the mail queue, top-level undelivered */
2341 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2343 /* -bpa: List the contents of the mail queue, including all delivered */
2345 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2347 /* Unknown after -bp[r] */
2353 /* -bP: List the configuration variables given as the address list.
2354 Force -v, so configuration errors get displayed. */
2357 /* -bP config: we need to setup here, because later,
2358 when list_options is checked, the config is read already */
2361 else if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2364 readconf_save_config(version_string);
2368 list_options = TRUE;
2369 debug_selector |= D_v;
2370 debug_file = stderr;
2374 /* -brt: Test retry configuration lookup */
2376 if (Ustrcmp(argrest, "t") == 0)
2379 test_retry_arg = i + 1;
2383 /* -brw: Test rewrite configuration */
2385 else if (Ustrcmp(argrest, "w") == 0)
2388 test_rewrite_arg = i + 1;
2394 /* -bS: Read SMTP commands on standard input, but produce no replies -
2395 all errors are reported by sending messages. */
2398 smtp_input = smtp_batched_input = receiving_message = TRUE;
2402 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2403 on standard output. */
2405 if (!*argrest) smtp_input = receiving_message = TRUE;
2409 /* -bt: address testing mode */
2412 f.address_test_mode = checking = f.log_testing_mode = TRUE;
2416 /* -bv: verify addresses */
2419 verify_address_mode = checking = f.log_testing_mode = TRUE;
2421 /* -bvs: verify sender addresses */
2423 else if (Ustrcmp(argrest, "s") == 0)
2425 verify_address_mode = checking = f.log_testing_mode = TRUE;
2426 verify_as_sender = TRUE;
2431 /* -bV: Print version string and support details */
2435 printf("Exim version %s #%s built %s\n", version_string,
2436 version_cnumber, version_date);
2437 printf("%s\n", CS version_copyright);
2438 version_printed = TRUE;
2439 show_whats_supported(stdout);
2440 f.log_testing_mode = TRUE;
2445 /* -bw: inetd wait mode, accept a listening socket as stdin */
2447 f.inetd_wait_mode = TRUE;
2448 f.background_daemon = FALSE;
2449 f.daemon_listen = TRUE;
2451 if ((inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE)) <= 0)
2452 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
2463 /* -C: change configuration file list; ignore if it isn't really
2464 a change! Enforce a prefix check if required. */
2468 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2469 if (Ustrcmp(config_main_filelist, argrest) != 0)
2471 #ifdef ALT_CONFIG_PREFIX
2473 int len = Ustrlen(ALT_CONFIG_PREFIX);
2474 const uschar *list = argrest;
2476 /* The argv is untainted, so big_buffer (also untainted) is ok to use */
2477 while((filename = string_nextinlist(&list, &sep, big_buffer,
2479 if ( ( Ustrlen(filename) < len
2480 || Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0
2481 || Ustrstr(filename, "/../") != NULL
2483 && (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid)
2485 exim_fail("-C Permission denied\n");
2487 if (real_uid != root_uid)
2489 #ifdef TRUSTED_CONFIG_LIST
2491 if (real_uid != exim_uid
2492 #ifdef CONFIGURE_OWNER
2493 && real_uid != config_uid
2496 f.trusted_config = FALSE;
2499 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
2502 struct stat statbuf;
2504 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2505 (statbuf.st_uid != root_uid /* owner not root */
2506 #ifdef CONFIGURE_OWNER
2507 && statbuf.st_uid != config_uid /* owner not the special one */
2510 (statbuf.st_gid != root_gid /* group not root */
2511 #ifdef CONFIGURE_GROUP
2512 && statbuf.st_gid != config_gid /* group not the special one */
2514 && (statbuf.st_mode & 020) != 0 /* group writeable */
2516 (statbuf.st_mode & 2) != 0) /* world writeable */
2518 f.trusted_config = FALSE;
2523 /* Well, the trust list at least is up to scratch... */
2525 uschar *trusted_configs[32];
2528 int old_pool = store_pool;
2529 store_pool = POOL_MAIN;
2531 reset_point = store_mark();
2532 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2534 uschar *start = big_buffer, *nl;
2535 while (*start && isspace(*start))
2539 nl = Ustrchr(start, '\n');
2542 trusted_configs[nr_configs++] = string_copy(start);
2543 if (nr_configs == nelem(trusted_configs))
2551 const uschar *list = argrest;
2553 while (f.trusted_config && (filename = string_nextinlist(&list,
2554 &sep, big_buffer, big_buffer_size)))
2556 for (i=0; i < nr_configs; i++)
2557 if (Ustrcmp(filename, trusted_configs[i]) == 0)
2559 if (i == nr_configs)
2561 f.trusted_config = FALSE;
2566 else /* No valid prefixes found in trust_list file. */
2567 f.trusted_config = FALSE;
2568 store_reset(reset_point);
2569 store_pool = old_pool;
2572 else /* Could not open trust_list file. */
2573 f.trusted_config = FALSE;
2576 /* Not root; don't trust config */
2577 f.trusted_config = FALSE;
2581 config_main_filelist = argrest;
2582 f.config_changed = TRUE;
2587 /* -D: set up a macro definition */
2590 #ifdef DISABLE_D_OPTION
2591 exim_fail("exim: -D is not available in this Exim binary\n");
2597 uschar *s = argrest;
2600 while (isspace(*s)) s++;
2602 if (*s < 'A' || *s > 'Z')
2603 exim_fail("exim: macro name set by -D must start with "
2604 "an upper case letter\n");
2606 while (isalnum(*s) || *s == '_')
2608 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2612 if (ptr == 0) { badarg = TRUE; break; }
2613 while (isspace(*s)) s++;
2616 if (*s++ != '=') { badarg = TRUE; break; }
2617 while (isspace(*s)) s++;
2620 for (m = macros_user; m; m = m->next)
2621 if (Ustrcmp(m->name, name) == 0)
2622 exim_fail("exim: duplicated -D in command line\n");
2624 m = macro_create(name, s, TRUE);
2626 if (clmacro_count >= MAX_CLMACROS)
2627 exim_fail("exim: too many -D options on command line\n");
2628 clmacros[clmacro_count++] =
2629 string_sprintf("-D%s=%s", m->name, m->replacement);
2634 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2635 The latter is now a no-op, retained for compatibility only. If -dd is used,
2636 debugging subprocesses of the daemon is disabled. */
2639 if (Ustrcmp(argrest, "ropcr") == 0)
2641 /* drop_cr = TRUE; */
2644 /* Use an intermediate variable so that we don't set debugging while
2645 decoding the debugging bits. */
2649 unsigned int selector = D_default;
2652 if (*argrest == 'd')
2654 f.debug_daemon = TRUE;
2658 decode_bits(&selector, 1, debug_notall, argrest,
2659 debug_options, debug_options_count, US"debug", 0);
2660 debug_selector = selector;
2665 /* -E: This is a local error message. This option is not intended for
2666 external use at all, but is not restricted to trusted callers because it
2667 does no harm (just suppresses certain error messages) and if Exim is run
2668 not setuid root it won't always be trusted when it generates error
2669 messages using this option. If there is a message id following -E, point
2670 message_reference at it, for logging. */
2673 f.local_error_message = TRUE;
2674 if (mac_ismsgid(argrest)) message_reference = argrest;
2678 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2679 option, so it looks as if historically the -oex options are also callable
2680 without the leading -o. So we have to accept them. Before the switch,
2681 anything starting -oe has been converted to -e. Exim does not support all
2682 of the sendmail error options. */
2685 if (Ustrcmp(argrest, "e") == 0)
2687 arg_error_handling = ERRORS_SENDER;
2688 errors_sender_rc = EXIT_SUCCESS;
2690 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2691 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2692 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2693 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2698 /* -F: Set sender's full name, used instead of the gecos entry from
2699 the password file. Since users can usually alter their gecos entries,
2700 there's no security involved in using this instead. The data can follow
2701 the -F or be in the next argument. */
2705 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2706 originator_name = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_HUMANNAME_MAX, "-F"), TRUE);
2707 f.sender_name_forced = TRUE;
2711 /* -f: Set sender's address - this value is only actually used if Exim is
2712 run by a trusted user, or if untrusted_set_sender is set and matches the
2713 address, except that the null address can always be set by any user. The
2714 test for this happens later, when the value given here is ignored when not
2715 permitted. For an untrusted user, the actual sender is still put in Sender:
2716 if it doesn't match the From: header (unless no_local_from_check is set).
2717 The data can follow the -f or be in the next argument. The -r switch is an
2718 obsolete form of -f but since there appear to be programs out there that
2719 use anything that sendmail has ever supported, better accept it - the
2720 synonymizing is done before the switch above.
2722 At this stage, we must allow domain literal addresses, because we don't
2723 know what the setting of allow_domain_literals is yet. Ditto for trailing
2724 dots and strip_trailing_dot. */
2728 int dummy_start, dummy_end;
2731 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
2732 (void) exim_str_fail_toolong(argrest, EXIM_DISPLAYMAIL_MAX, "-f");
2734 *(sender_address = store_get(1, FALSE)) = '\0'; /* Ensure writeable memory */
2737 uschar * temp = argrest + Ustrlen(argrest) - 1;
2738 while (temp >= argrest && isspace(*temp)) temp--;
2739 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2740 allow_domain_literals = TRUE;
2741 strip_trailing_dot = TRUE;
2743 allow_utf8_domains = TRUE;
2745 if (!(sender_address = parse_extract_address(argrest, &errmess,
2746 &dummy_start, &dummy_end, &sender_address_domain, TRUE)))
2747 exim_fail("exim: bad -f address \"%s\": %s\n", argrest, errmess);
2749 sender_address = string_copy_taint(sender_address, TRUE);
2751 message_smtputf8 = string_is_utf8(sender_address);
2752 allow_utf8_domains = FALSE;
2754 allow_domain_literals = FALSE;
2755 strip_trailing_dot = FALSE;
2757 f.sender_address_forced = TRUE;
2761 /* -G: sendmail invocation to specify that it's a gateway submission and
2762 sendmail may complain about problems instead of fixing them.
2763 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2764 not at this time complain about problems. */
2770 /* -h: Set the hop count for an incoming message. Exim does not currently
2771 support this; it always computes it by counting the Received: headers.
2772 To put it in will require a change to the spool header file format. */
2776 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2777 if (!isdigit(*argrest)) badarg = TRUE;
2781 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2782 not to be documented for sendmail but mailx (at least) uses it) */
2785 if (!*argrest) f.dot_ends = FALSE; else badarg = TRUE;
2789 /* -L: set the identifier used for syslog; equivalent to setting
2790 syslog_processname in the config file, but needs to be an admin option. */
2794 if (++i < argc) argrest = argv[i]; else { badarg = TRUE; break; }
2795 if ((sz = Ustrlen(argrest)) > 32)
2796 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest);
2798 exim_fail("exim: the -L syslog name is too short\n");
2799 cmdline_syslog_name = string_copy_taint(argrest, TRUE);
2803 receiving_message = FALSE;
2805 /* -MC: continue delivery of another message via an existing open
2806 file descriptor. This option is used for an internal call by the
2807 smtp transport when there is a pending message waiting to go to an
2808 address to which it has got a connection. Five subsequent arguments are
2809 required: transport name, host name, IP address, sequence number, and
2810 message_id. Transports may decline to create new processes if the sequence
2811 number gets too big. The channel is stdin. This (-MC) must be the last
2812 argument. There's a subsequent check that the real-uid is privileged.
2814 If we are running in the test harness. delay for a bit, to let the process
2815 that set this one up complete. This makes for repeatability of the logging,
2818 if (Ustrcmp(argrest, "C") == 0)
2820 union sockaddr_46 interface_sock;
2821 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2824 exim_fail("exim: too many or too few arguments after -MC\n");
2826 if (msg_action_arg >= 0)
2827 exim_fail("exim: incompatible arguments\n");
2829 continue_transport = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-C internal transport"), TRUE);
2830 continue_hostname = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-C internal hostname"), TRUE);
2831 continue_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-C internal hostaddr"), TRUE);
2832 continue_sequence = Uatoi(argv[++i]);
2833 msg_action = MSG_DELIVER;
2834 msg_action_arg = ++i;
2835 forced_delivery = TRUE;
2836 queue_run_pid = passed_qr_pid;
2837 queue_run_pipe = passed_qr_pipe;
2839 if (!mac_ismsgid(argv[i]))
2840 exim_fail("exim: malformed message id %s after -MC option\n",
2843 /* Set up $sending_ip_address and $sending_port, unless proxied */
2845 if (!continue_proxy_cipher)
2846 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2848 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2851 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2854 testharness_pause_ms(500);
2858 else if (*argrest == 'C' && argrest[1] && !argrest[2])
2862 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2863 precedes -MC (see above). The flag indicates that the host to which
2864 Exim is connected has accepted an AUTH sequence. */
2866 case 'A': f.smtp_authenticated = TRUE; break;
2868 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2869 that exim is connected to supports the esmtp extension DSN */
2871 case 'D': smtp_peer_options |= OPTION_DSN; break;
2873 /* -MCd: for debug, set a process-purpose string */
2875 case 'd': if (++i < argc)
2876 process_purpose = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCd"), TRUE);
2880 /* -MCG: set the queue name, to a non-default value. Arguably, anything
2881 from the commandline should be tainted - but we will need an untainted
2882 value for the spoolfile when doing a -odi delivery process. */
2884 case 'G': if (++i < argc) queue_name = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-MCG"), FALSE);
2888 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2890 case 'K': smtp_peer_options |= OPTION_CHUNKING; break;
2892 #ifdef EXPERIMENTAL_ESMTP_LIMITS
2893 /* -MCL: peer used LIMITS RCPTMAX and/or RCPTDOMAINMAX */
2894 case 'L': if (++i < argc) continue_limit_mail = Uatoi(argv[i]);
2896 if (++i < argc) continue_limit_rcpt = Uatoi(argv[i]);
2898 if (++i < argc) continue_limit_rcptdom = Uatoi(argv[i]);
2903 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2904 it preceded -MC (see above) */
2906 case 'P': smtp_peer_options |= OPTION_PIPE; break;
2908 #ifdef SUPPORT_SOCKS
2909 /* -MCp: Socks proxy in use; nearside IP, port, external IP, port */
2910 case 'p': proxy_session = TRUE;
2913 proxy_local_address = string_copy_taint(argv[i], TRUE);
2916 proxy_local_port = Uatoi(argv[i]);
2919 proxy_external_address = string_copy_taint(argv[i], TRUE);
2922 proxy_external_port = Uatoi(argv[i]);
2928 /* -MCQ: pass on the pid of the queue-running process that started
2929 this chain of deliveries and the fd of its synchronizing pipe; this
2930 is useful only when it precedes -MC (see above) */
2932 case 'Q': if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2934 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2938 /* -MCq: do a quota check on the given recipient for the given size
2939 of message. Separate from -MC. */
2940 case 'q': rcpt_verify_quota = TRUE;
2941 if (++i < argc) message_size = Uatoi(argv[i]);
2945 /* -MCS: set the smtp_use_size flag; this is useful only when it
2946 precedes -MC (see above) */
2948 case 'S': smtp_peer_options |= OPTION_SIZE; break;
2951 /* -MCs: used with -MCt; SNI was sent */
2952 /* -MCr: ditto, DANE */
2955 case 's': if (++i < argc)
2957 continue_proxy_sni = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_HOSTNAME_MAX, "-MCr/-MCs"), TRUE);
2958 if (argrest[1] == 'r') continue_proxy_dane = TRUE;
2963 /* -MCt: similar to -MCT below but the connection is still open
2964 via a proxy process which handles the TLS context and coding.
2965 Require three arguments for the proxied local address and port,
2966 and the TLS cipher. */
2968 case 't': if (++i < argc)
2969 sending_ip_address = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_IPADDR_MAX, "-MCt IP"), TRUE);
2972 sending_port = (int)(Uatol(argv[i]));
2975 continue_proxy_cipher = string_copy_taint(exim_str_fail_toolong(argv[i], EXIM_CIPHERNAME_MAX, "-MCt cipher"), TRUE);
2979 /* -MCT: set the tls_offered flag; this is useful only when it
2980 precedes -MC (see above). The flag indicates that the host to which
2981 Exim is connected has offered TLS support. */
2983 case 'T': smtp_peer_options |= OPTION_TLS; break;
2986 default: badarg = TRUE; break;
2991 /* -M[x]: various operations on the following list of message ids:
2992 -M deliver the messages, ignoring next retry times and thawing
2993 -Mc deliver the messages, checking next retry times, no thawing
2994 -Mf freeze the messages
2995 -Mg give up on the messages
2996 -Mt thaw the messages
2997 -Mrm remove the messages
2998 In the above cases, this must be the last option. There are also the
2999 following options which are followed by a single message id, and which
3000 act on that message. Some of them use the "recipient" addresses as well.
3001 -Mar add recipient(s)
3002 -MG move to a different queue
3003 -Mmad mark all recipients delivered
3004 -Mmd mark recipients(s) delivered
3006 -Mset load a message for use with -be
3008 -Mvc show copy (of whole message, in RFC 2822 format)
3015 msg_action = MSG_DELIVER;
3016 forced_delivery = f.deliver_force_thaw = TRUE;
3018 else if (Ustrcmp(argrest, "ar") == 0)
3020 msg_action = MSG_ADD_RECIPIENT;
3021 one_msg_action = TRUE;
3023 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
3024 else if (Ustrcmp(argrest, "es") == 0)
3026 msg_action = MSG_EDIT_SENDER;
3027 one_msg_action = TRUE;
3029 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
3030 else if (Ustrcmp(argrest, "g") == 0)
3032 msg_action = MSG_DELIVER;
3033 deliver_give_up = TRUE;
3035 else if (Ustrcmp(argrest, "G") == 0)
3037 msg_action = MSG_SETQUEUE;
3038 queue_name_dest = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-MG"), TRUE);
3040 else if (Ustrcmp(argrest, "mad") == 0)
3042 msg_action = MSG_MARK_ALL_DELIVERED;
3044 else if (Ustrcmp(argrest, "md") == 0)
3046 msg_action = MSG_MARK_DELIVERED;
3047 one_msg_action = TRUE;
3049 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
3050 else if (Ustrcmp(argrest, "set") == 0)
3052 msg_action = MSG_LOAD;
3053 one_msg_action = TRUE;
3055 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
3056 else if (Ustrcmp(argrest, "vb") == 0)
3058 msg_action = MSG_SHOW_BODY;
3059 one_msg_action = TRUE;
3061 else if (Ustrcmp(argrest, "vc") == 0)
3063 msg_action = MSG_SHOW_COPY;
3064 one_msg_action = TRUE;
3066 else if (Ustrcmp(argrest, "vh") == 0)
3068 msg_action = MSG_SHOW_HEADER;
3069 one_msg_action = TRUE;
3071 else if (Ustrcmp(argrest, "vl") == 0)
3073 msg_action = MSG_SHOW_LOG;
3074 one_msg_action = TRUE;
3076 else { badarg = TRUE; break; }
3078 /* All the -Mxx options require at least one message id. */
3080 msg_action_arg = i + 1;
3081 if (msg_action_arg >= argc)
3082 exim_fail("exim: no message ids given after %s option\n", arg);
3084 /* Some require only message ids to follow */
3086 if (!one_msg_action)
3088 for (int j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
3089 exim_fail("exim: malformed message id %s after %s option\n",
3091 goto END_ARG; /* Remaining args are ids */
3094 /* Others require only one message id, possibly followed by addresses,
3095 which will be handled as normal arguments. */
3099 if (!mac_ismsgid(argv[msg_action_arg]))
3100 exim_fail("exim: malformed message id %s after %s option\n",
3101 argv[msg_action_arg], arg);
3107 /* Some programs seem to call the -om option without the leading o;
3108 for sendmail it askes for "me too". Exim always does this. */
3111 if (*argrest) badarg = TRUE;
3115 /* -N: don't do delivery - a debugging option that stops transports doing
3116 their thing. It implies debugging at the D_v level. */
3121 f.dont_deliver = TRUE;
3122 debug_selector |= D_v;
3123 debug_file = stderr;
3129 /* -n: This means "don't alias" in sendmail, apparently.
3130 For normal invocations, it has no effect.
3131 It may affect some other options. */
3137 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
3138 option to the specified value. This form uses long names. We need to handle
3139 -O option=value and -Ooption=value. */
3144 exim_fail("exim: string expected after -O\n");
3150 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
3153 if (!*(alias_arg = argrest))
3154 if (i+1 < argc) alias_arg = argv[++i];
3155 else exim_fail("exim: string expected after -oA\n");
3158 /* -oB: Set a connection message max value for remote deliveries */
3161 uschar * p = argrest;
3163 if (i+1 < argc && isdigit((argv[i+1][0])))
3167 connection_max_messages = 1;
3174 exim_fail("exim: number expected after -oB\n");
3175 connection_max_messages = Uatoi(p);
3180 /* -odb: background delivery */
3183 if (Ustrcmp(argrest, "b") == 0)
3185 f.synchronous_delivery = FALSE;
3186 arg_queue_only = FALSE;
3187 queue_only_set = TRUE;
3190 /* -odd: testsuite-only: add no inter-process delays */
3192 else if (Ustrcmp(argrest, "d") == 0)
3193 f.testsuite_delays = FALSE;
3195 /* -odf: foreground delivery (smail-compatible option); same effect as
3196 -odi: interactive (synchronous) delivery (sendmail-compatible option)
3199 else if (Ustrcmp(argrest, "f") == 0 || Ustrcmp(argrest, "i") == 0)
3201 f.synchronous_delivery = TRUE;
3202 arg_queue_only = FALSE;
3203 queue_only_set = TRUE;
3206 /* -odq: queue only */
3208 else if (Ustrcmp(argrest, "q") == 0)
3210 f.synchronous_delivery = FALSE;
3211 arg_queue_only = TRUE;
3212 queue_only_set = TRUE;
3215 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3216 but no remote delivery */
3218 else if (Ustrcmp(argrest, "qs") == 0)
3220 f.queue_smtp = TRUE;
3221 arg_queue_only = FALSE;
3222 queue_only_set = TRUE;
3227 /* -oex: Sendmail error flags. As these are also accepted without the
3228 leading -o prefix, for compatibility with vacation and other callers,
3229 they are handled with -e above. */
3231 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3232 -oitrue: Another sendmail syntax for the same */
3235 if (!*argrest || Ustrcmp(argrest, "true") == 0)
3240 /* -oM*: Set various characteristics for an incoming message; actually
3241 acted on for trusted callers only. */
3246 exim_fail("exim: data expected after -oM%s\n", argrest);
3248 /* -oMa: Set sender host address */
3250 if (Ustrcmp(argrest, "a") == 0)
3251 sender_host_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMa"), TRUE);
3253 /* -oMaa: Set authenticator name */
3255 else if (Ustrcmp(argrest, "aa") == 0)
3256 sender_host_authenticated = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMaa"), TRUE);
3258 /* -oMas: setting authenticated sender */
3260 else if (Ustrcmp(argrest, "as") == 0)
3261 authenticated_sender = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3263 /* -oMai: setting authenticated id */
3265 else if (Ustrcmp(argrest, "ai") == 0)
3266 authenticated_id = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_EMAILADDR_MAX, "-oMas"), TRUE);
3268 /* -oMi: Set incoming interface address */
3270 else if (Ustrcmp(argrest, "i") == 0)
3271 interface_address = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IPADDR_MAX, "-oMi"), TRUE);
3273 /* -oMm: Message reference */
3275 else if (Ustrcmp(argrest, "m") == 0)
3277 if (!mac_ismsgid(argv[i+1]))
3278 exim_fail("-oMm must be a valid message ID\n");
3279 if (!f.trusted_config)
3280 exim_fail("-oMm must be called by a trusted user/config\n");
3281 message_reference = argv[++i];
3284 /* -oMr: Received protocol */
3286 else if (Ustrcmp(argrest, "r") == 0)
3288 if (received_protocol)
3289 exim_fail("received_protocol is set already\n");
3291 received_protocol = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_DRIVERNAME_MAX, "-oMr"), TRUE);
3293 /* -oMs: Set sender host name */
3295 else if (Ustrcmp(argrest, "s") == 0)
3296 sender_host_name = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_HOSTNAME_MAX, "-oMs"), TRUE);
3298 /* -oMt: Set sender ident */
3300 else if (Ustrcmp(argrest, "t") == 0)
3302 sender_ident_set = TRUE;
3303 sender_ident = string_copy_taint(exim_str_fail_toolong(argv[++i], EXIM_IDENTUSER_MAX, "-oMt"), TRUE);
3306 /* Else a bad argument */
3313 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3314 seem to call this as -m (undocumented), so that is also accepted (see
3316 /* -oo: An ancient flag for old-style addresses which still seems to
3317 crop up in some calls (see in SCO). */
3321 if (*argrest) badarg = TRUE;
3324 /* -oP <name>: set pid file path for daemon
3325 -oPX: delete pid file of daemon */
3328 if (!f.running_in_test_harness && real_uid != root_uid && real_uid != exim_uid)
3329 exim_fail("exim: only uid=%d or uid=%d can use -oP and -oPX "
3330 "(uid=%d euid=%d | %d)\n",
3331 root_uid, exim_uid, getuid(), geteuid(), real_uid);
3332 if (!*argrest) override_pid_file_path = argv[++i];
3333 else if (Ustrcmp(argrest, "X") == 0) delete_pid_file();
3338 /* -or <n>: set timeout for non-SMTP acceptance
3339 -os <n>: set timeout for SMTP acceptance */
3344 int * tp = argrest[-1] == 'r'
3345 ? &arg_receive_timeout : &arg_smtp_receive_timeout;
3347 *tp = readconf_readtime(argrest, 0, FALSE);
3348 else if (i+1 < argc)
3349 *tp = readconf_readtime(argv[++i], 0, FALSE);
3352 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3356 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3357 /* Limits: Is there a real limit we want here? 1024 is very arbitrary. */
3360 if (*argrest) badarg = TRUE;
3361 else override_local_interfaces = string_copy_taint(exim_str_fail_toolong(argv[++i], 1024, "-oX"), TRUE);
3364 /* -oY: Override creation of daemon notifier socket */
3367 if (*argrest) badarg = TRUE;
3368 else notifier_socket = NULL;
3371 /* Unknown -o argument */
3379 /* -ps: force Perl startup; -pd force delayed Perl startup */
3383 if (*argrest == 's' && argrest[1] == 0)
3385 perl_start_option = 1;
3388 if (*argrest == 'd' && argrest[1] == 0)
3390 perl_start_option = -1;
3395 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3396 which sets the host protocol and host name */
3399 if (i+1 < argc) argrest = argv[++i]; else { badarg = TRUE; break; }
3403 uschar * hn = Ustrchr(argrest, ':');
3405 if (received_protocol)
3406 exim_fail("received_protocol is set already\n");
3409 received_protocol = string_copy_taint(exim_str_fail_toolong(argrest, EXIM_DRIVERNAME_MAX, "-p<protocol>"), TRUE);
3412 (void) exim_str_fail_toolong(argrest, (EXIM_DRIVERNAME_MAX+1+EXIM_HOSTNAME_MAX), "-p<protocol>:<host>");
3413 received_protocol = string_copyn_taint(argrest, hn - argrest, TRUE);
3414 sender_host_name = string_copy_taint(hn + 1, TRUE);
3421 receiving_message = FALSE;
3422 if (queue_interval >= 0)
3423 exim_fail("exim: -q specified more than once\n");
3425 /* -qq...: Do queue runs in a 2-stage manner */
3427 if (*argrest == 'q')
3429 f.queue_2stage = TRUE;
3433 /* -qi...: Do only first (initial) deliveries */
3435 if (*argrest == 'i')
3437 f.queue_run_first_delivery = TRUE;
3441 /* -qf...: Run the queue, forcing deliveries
3442 -qff..: Ditto, forcing thawing as well */
3444 if (*argrest == 'f')
3446 f.queue_run_force = TRUE;
3447 if (*++argrest == 'f')
3449 f.deliver_force_thaw = TRUE;
3454 /* -q[f][f]l...: Run the queue only on local deliveries */
3456 if (*argrest == 'l')
3458 f.queue_run_local = TRUE;
3462 /* -q[f][f][l][G<name>]... Work on the named queue */
3464 if (*argrest == 'G')
3467 for (argrest++, i = 0; argrest[i] && argrest[i] != '/'; ) i++;
3468 exim_len_fail_toolong(i, EXIM_DRIVERNAME_MAX, "-q*G<name>");
3469 queue_name = string_copyn(argrest, i);
3471 if (*argrest == '/') argrest++;
3474 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3475 only, optionally named, optionally starting from a given message id. */
3477 if (!(list_queue || count_queue))
3479 && (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3482 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3483 start_queue_run_id = string_copy_taint(argv[++i], TRUE);
3484 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3485 stop_queue_run_id = string_copy_taint(argv[++i], TRUE);
3488 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3489 forced, optionally local only, optionally named. */
3491 else if ((queue_interval = readconf_readtime(*argrest ? argrest : argv[++i],
3493 exim_fail("exim: bad time value %s: abandoned\n", argv[i]);
3497 case 'R': /* Synonymous with -qR... */
3499 const uschar *tainted_selectstr;
3501 receiving_message = FALSE;
3503 /* -Rf: As -R (below) but force all deliveries,
3504 -Rff: Ditto, but also thaw all frozen messages,
3505 -Rr: String is regex
3506 -Rrf: Regex and force
3507 -Rrff: Regex and force and thaw
3509 in all cases provided there are no further characters in this
3513 for (int i = 0; i < nelem(rsopts); i++)
3514 if (Ustrcmp(argrest, rsopts[i]) == 0)
3516 if (i != 2) f.queue_run_force = TRUE;
3517 if (i >= 2) f.deliver_selectstring_regex = TRUE;
3518 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3519 argrest += Ustrlen(rsopts[i]);
3522 /* -R: Set string to match in addresses for forced queue run to
3523 pick out particular messages. */
3525 /* Avoid attacks from people providing very long strings, and do so before
3528 tainted_selectstr = argrest;
3529 else if (i+1 < argc)
3530 tainted_selectstr = argv[++i];
3532 exim_fail("exim: string expected after -R\n");
3533 deliver_selectstring = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-R"), TRUE);
3537 /* -r: an obsolete synonym for -f (see above) */
3540 /* -S: Like -R but works on sender. */
3542 case 'S': /* Synonymous with -qS... */
3544 const uschar *tainted_selectstr;
3546 receiving_message = FALSE;
3548 /* -Sf: As -S (below) but force all deliveries,
3549 -Sff: Ditto, but also thaw all frozen messages,
3550 -Sr: String is regex
3551 -Srf: Regex and force
3552 -Srff: Regex and force and thaw
3554 in all cases provided there are no further characters in this
3558 for (int i = 0; i < nelem(rsopts); i++)
3559 if (Ustrcmp(argrest, rsopts[i]) == 0)
3561 if (i != 2) f.queue_run_force = TRUE;
3562 if (i >= 2) f.deliver_selectstring_sender_regex = TRUE;
3563 if (i == 1 || i == 4) f.deliver_force_thaw = TRUE;
3564 argrest += Ustrlen(rsopts[i]);
3567 /* -S: Set string to match in addresses for forced queue run to
3568 pick out particular messages. */
3571 tainted_selectstr = argrest;
3572 else if (i+1 < argc)
3573 tainted_selectstr = argv[++i];
3575 exim_fail("exim: string expected after -S\n");
3576 deliver_selectstring_sender = string_copy_taint(exim_str_fail_toolong(tainted_selectstr, EXIM_EMAILADDR_MAX, "-S"), TRUE);
3580 /* -Tqt is an option that is exclusively for use by the testing suite.
3581 It is not recognized in other circumstances. It allows for the setting up
3582 of explicit "queue times" so that various warning/retry things can be
3583 tested. Otherwise variability of clock ticks etc. cause problems. */
3586 if (f.running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3587 fudged_queue_times = string_copy_taint(argv[++i], TRUE);
3592 /* -t: Set flag to extract recipients from body of message. */
3595 if (!*argrest) extract_recipients = TRUE;
3597 /* -ti: Set flag to extract recipients from body of message, and also
3598 specify that dot does not end the message. */
3600 else if (Ustrcmp(argrest, "i") == 0)
3602 extract_recipients = TRUE;
3606 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3609 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
3616 /* -U: This means "initial user submission" in sendmail, apparently. The
3617 doc claims that in future sendmail may refuse syntactically invalid
3618 messages instead of fixing them. For the moment, we just ignore it. */
3624 /* -v: verify things - this is a very low-level debugging */
3629 debug_selector |= D_v;
3630 debug_file = stderr;
3636 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3638 The -x flag tells the sendmail command that mail from a local
3639 mail program has National Language Support (NLS) extended characters
3640 in the body of the mail item. The sendmail command can send mail with
3641 extended NLS characters across networks that normally corrupts these
3644 As Exim is 8-bit clean, it just ignores this flag. */
3647 if (*argrest) badarg = TRUE;
3650 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3651 logs to that file. We swallow the parameter and otherwise ignore it. */
3656 exim_fail("exim: string expected after -X\n");
3659 /* -z: a line of text to log */
3664 log_oneline = string_copy_taint(exim_str_fail_toolong(argv[i], 2048, "-z logtext"), TRUE);
3666 exim_fail("exim: file name expected after %s\n", argv[i-1]);
3669 /* All other initial characters are errors */
3674 } /* End of high-level switch statement */
3676 /* Failed to recognize the option, or syntax error */
3679 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3680 "option %s\n", arg);
3684 /* If -R or -S have been specified without -q, assume a single queue run. */
3686 if ( (deliver_selectstring || deliver_selectstring_sender)
3687 && queue_interval < 0)
3692 store_pool = old_pool;
3695 /* If usage_wanted is set we call the usage function - which never returns */
3696 if (usage_wanted) exim_usage(called_as);
3698 /* Arguments have been processed. Check for incompatibilities. */
3699 if ( ( (smtp_input || extract_recipients || recipients_arg < argc)
3700 && ( f.daemon_listen || queue_interval >= 0 || bi_option
3701 || test_retry_arg >= 0 || test_rewrite_arg >= 0
3702 || filter_test != FTEST_NONE
3703 || msg_action_arg > 0 && !one_msg_action
3705 || ( msg_action_arg > 0
3706 && ( f.daemon_listen || queue_interval > 0 || list_options
3707 || checking && msg_action != MSG_LOAD
3708 || bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0
3710 || ( (f.daemon_listen || queue_interval > 0)
3711 && ( sender_address || list_options || list_queue || checking
3714 || f.daemon_listen && queue_interval == 0
3715 || f.inetd_wait_mode && queue_interval >= 0
3717 && ( checking || smtp_input || extract_recipients
3718 || filter_test != FTEST_NONE || bi_option
3720 || ( verify_address_mode
3721 && ( f.address_test_mode || smtp_input || extract_recipients
3722 || filter_test != FTEST_NONE || bi_option
3724 || ( f.address_test_mode
3725 && ( smtp_input || extract_recipients || filter_test != FTEST_NONE
3729 && (sender_address || filter_test != FTEST_NONE || extract_recipients)
3731 || deliver_selectstring && queue_interval < 0
3732 || msg_action == MSG_LOAD && (!expansion_test || expansion_test_message)
3734 exim_fail("exim: incompatible command-line options or arguments\n");
3736 /* If debugging is set up, set the file and the file descriptor to pass on to
3737 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3738 to run in the foreground. */
3740 if (debug_selector != 0)
3742 debug_file = stderr;
3743 debug_fd = fileno(debug_file);
3744 f.background_daemon = FALSE;
3745 testharness_pause_ms(100); /* lets caller finish */
3746 if (debug_selector != D_v) /* -v only doesn't show this */
3748 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3749 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3751 if (!version_printed)
3752 show_whats_supported(stderr);
3756 /* When started with root privilege, ensure that the limits on the number of
3757 open files and the number of processes (where that is accessible) are
3758 sufficiently large, or are unset, in case Exim has been called from an
3759 environment where the limits are screwed down. Not all OS have the ability to
3760 change some of these limits. */
3764 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3770 #ifdef RLIMIT_NOFILE
3771 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3773 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3775 rlp.rlim_cur = rlp.rlim_max = 0;
3778 /* I originally chose 1000 as a nice big number that was unlikely to
3779 be exceeded. It turns out that some older OS have a fixed upper limit of
3782 if (rlp.rlim_cur < 1000)
3784 rlp.rlim_cur = rlp.rlim_max = 1000;
3785 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3787 rlp.rlim_cur = rlp.rlim_max = 256;
3788 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3789 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3796 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3798 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3800 rlp.rlim_cur = rlp.rlim_max = 0;
3803 # ifdef RLIM_INFINITY
3804 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3806 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3808 if (rlp.rlim_cur < 1000)
3810 rlp.rlim_cur = rlp.rlim_max = 1000;
3812 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3813 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3819 /* Exim is normally entered as root (but some special configurations are
3820 possible that don't do this). However, it always spins off sub-processes that
3821 set their uid and gid as required for local delivery. We don't want to pass on
3822 any extra groups that root may belong to, so we want to get rid of them all at
3825 We need to obey setgroups() at this stage, before possibly giving up root
3826 privilege for a changed configuration file, but later on we might need to
3827 check on the additional groups for the admin user privilege - can't do that
3828 till after reading the config, which might specify the exim gid. Therefore,
3829 save the group list here first. */
3831 if ((group_count = getgroups(nelem(group_list), group_list)) < 0)
3832 exim_fail("exim: getgroups() failed: %s\n", strerror(errno));
3834 /* There is a fundamental difference in some BSD systems in the matter of
3835 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3836 known not to be different. On the "different" systems there is a single group
3837 list, and the first entry in it is the current group. On all other versions of
3838 Unix there is a supplementary group list, which is in *addition* to the current
3839 group. Consequently, to get rid of all extraneous groups on a "standard" system
3840 you pass over 0 groups to setgroups(), while on a "different" system you pass
3841 over a single group - the current group, which is always the first group in the
3842 list. Calling setgroups() with zero groups on a "different" system results in
3843 an error return. The following code should cope with both types of system.
3845 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3846 the "setgroups() with zero groups" - and changes the egid.
3847 Thanks to that we had to stash the original_egid above, for use below
3848 in the call to exim_setugid().
3850 However, if this process isn't running as root, setgroups() can't be used
3851 since you have to be root to run it, even if throwing away groups.
3852 Except, sigh, for Hurd - where you can.
3853 Not being root here happens only in some unusual configurations. */
3856 #ifndef OS_SETGROUPS_ZERO_DROPS_ALL
3857 && setgroups(0, NULL) != 0
3859 && setgroups(1, group_list) != 0)
3860 exim_fail("exim: setgroups() failed: %s\n", strerror(errno));
3862 /* If the configuration file name has been altered by an argument on the
3863 command line (either a new file name or a macro definition) and the caller is
3864 not root, or if this is a filter testing run, remove any setuid privilege the
3865 program has and run as the underlying user.
3867 The exim user is locked out of this, which severely restricts the use of -C
3870 Otherwise, set the real ids to the effective values (should be root unless run
3871 from inetd, which it can either be root or the exim uid, if one is configured).
3873 There is a private mechanism for bypassing some of this, in order to make it
3874 possible to test lots of configurations automatically, without having either to
3875 recompile each time, or to patch in an actual configuration file name and other
3876 values (such as the path name). If running in the test harness, pretend that
3877 configuration file changes and macro definitions haven't happened. */
3880 (!f.trusted_config || /* Config changed, or */
3881 !macros_trusted(opt_D_used)) && /* impermissible macros and */
3882 real_uid != root_uid && /* Not root, and */
3883 !f.running_in_test_harness /* Not fudged */
3885 expansion_test /* expansion testing */
3887 filter_test != FTEST_NONE) /* Filter testing */
3889 setgroups(group_count, group_list);
3890 exim_setugid(real_uid, real_gid, FALSE,
3891 US"-C, -D, -be or -bf forces real uid");
3892 removed_privilege = TRUE;
3894 /* In the normal case when Exim is called like this, stderr is available
3895 and should be used for any logging information because attempts to write
3896 to the log will usually fail. To arrange this, we unset really_exim. However,
3897 if no stderr is available there is no point - we might as well have a go
3898 at the log (if it fails, syslog will be written).
3900 Note that if the invoker is Exim, the logs remain available. Messing with
3901 this causes unlogged successful deliveries. */
3903 if (log_stderr && real_uid != exim_uid)
3904 f.really_exim = FALSE;
3907 /* Privilege is to be retained for the moment. It may be dropped later,
3908 depending on the job that this Exim process has been asked to do. For now, set
3909 the real uid to the effective so that subsequent re-execs of Exim are done by a
3913 exim_setugid(geteuid(), original_egid, FALSE, US"forcing real = effective");
3915 /* If testing a filter, open the file(s) now, before wasting time doing other
3916 setups and reading the message. */
3918 if (filter_test & FTEST_SYSTEM)
3919 if ((filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0)) < 0)
3920 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile,
3923 if (filter_test & FTEST_USER)
3924 if ((filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0)) < 0)
3925 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile,
3928 /* Initialise lookup_list
3929 If debugging, already called above via version reporting.
3930 In either case, we initialise the list of available lookups while running
3931 as root. All dynamically modules are loaded from a directory which is
3932 hard-coded into the binary and is code which, if not a module, would be
3933 part of Exim already. Ability to modify the content of the directory
3934 is equivalent to the ability to modify a setuid binary!
3936 This needs to happen before we read the main configuration. */
3939 /*XXX this excrescence could move to the testsuite standard config setup file */
3941 if (f.running_in_test_harness) smtputf8_advertise_hosts = NULL;
3944 /* Read the main runtime configuration data; this gives up if there
3945 is a failure. It leaves the configuration file open so that the subsequent
3946 configuration data for delivery can be read if needed.
3948 NOTE: immediately after opening the configuration file we change the working
3949 directory to "/"! Later we change to $spool_directory. We do it there, because
3950 during readconf_main() some expansion takes place already. */
3952 /* Store the initial cwd before we change directories. Can be NULL if the
3953 dir has already been unlinked. */
3954 initial_cwd = os_getcwd(NULL, 0);
3955 if (!initial_cwd && errno)
3956 exim_fail("exim: getting initial cwd failed: %s\n", strerror(errno));
3958 if (initial_cwd && (strlen(CCS initial_cwd) >= BIG_BUFFER_SIZE))
3959 exim_fail("exim: initial cwd is far too long (%d)\n", Ustrlen(CCS initial_cwd));
3962 -be[m] expansion test -
3963 -b[fF] filter test new
3965 -bmalware malware_test_file new
3967 -brw rewrite test new
3969 -bv[s] address verify -
3971 -bP <option> (except -bP config, which sets list_config)
3973 If any of these options is set, we suppress warnings about configuration
3974 issues (currently about tls_advertise_hosts and keep_environment not being
3978 int old_pool = store_pool;
3979 #ifdef MEASURE_TIMING
3980 struct timeval t0, diff;
3981 (void)gettimeofday(&t0, NULL);
3984 store_pool = POOL_CONFIG;
3985 readconf_main(checking || list_options);
3986 store_pool = old_pool;
3988 #ifdef MEASURE_TIMING
3989 report_time_since(&t0, US"readconf_main (delta)");
3993 /* Now in directory "/" */
3995 if (cleanup_environment() == FALSE)
3996 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3999 /* If an action on specific messages is requested, or if a daemon or queue
4000 runner is being started, we need to know if Exim was called by an admin user.
4001 This is the case if the real user is root or exim, or if the real group is
4002 exim, or if one of the supplementary groups is exim or a group listed in
4003 admin_groups. We don't fail all message actions immediately if not admin_user,
4004 since some actions can be performed by non-admin users. Instead, set admin_user
4005 for later interrogation. */
4007 if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
4008 f.admin_user = TRUE;
4010 for (int i = 0; i < group_count && !f.admin_user; i++)
4011 if (group_list[i] == exim_gid)
4012 f.admin_user = TRUE;
4013 else if (admin_groups)
4014 for (int j = 1; j <= (int)admin_groups[0] && !f.admin_user; j++)
4015 if (admin_groups[j] == group_list[i])
4016 f.admin_user = TRUE;
4018 /* Another group of privileged users are the trusted users. These are root,
4019 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
4020 are permitted to specify sender_addresses with -f on the command line, and
4021 other message parameters as well. */
4023 if (real_uid == root_uid || real_uid == exim_uid)
4024 f.trusted_caller = TRUE;
4028 for (int i = 1; i <= (int)trusted_users[0] && !f.trusted_caller; i++)
4029 if (trusted_users[i] == real_uid)
4030 f.trusted_caller = TRUE;
4033 for (int i = 1; i <= (int)trusted_groups[0] && !f.trusted_caller; i++)
4034 if (trusted_groups[i] == real_gid)
4035 f.trusted_caller = TRUE;
4036 else for (int j = 0; j < group_count && !f.trusted_caller; j++)
4037 if (trusted_groups[i] == group_list[j])
4038 f.trusted_caller = TRUE;
4041 /* At this point, we know if the user is privileged and some command-line
4042 options become possibly impermissible, depending upon the configuration file. */
4044 if (checking && commandline_checks_require_admin && !f.admin_user)
4045 exim_fail("exim: those command-line flags are set to require admin\n");
4047 /* Handle the decoding of logging options. */
4049 decode_bits(log_selector, log_selector_size, log_notall,
4050 log_selector_string, log_options, log_options_count, US"log", 0);
4054 debug_printf("configuration file is %s\n", config_main_filename);
4055 debug_printf("log selectors =");
4056 for (int i = 0; i < log_selector_size; i++)
4057 debug_printf(" %08x", log_selector[i]);
4061 /* If domain literals are not allowed, check the sender address that was
4062 supplied with -f. Ditto for a stripped trailing dot. */
4066 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
4067 exim_fail("exim: bad -f address \"%s\": domain literals not "
4068 "allowed\n", sender_address);
4069 if (f_end_dot && !strip_trailing_dot)
4070 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
4071 "(trailing dot not allowed)\n", sender_address);
4074 /* See if an admin user overrode our logging. */
4076 if (cmdline_syslog_name)
4079 syslog_processname = cmdline_syslog_name;
4080 log_file_path = string_copy(CUS"syslog");
4083 /* not a panic, non-privileged users should not be able to spam paniclog */
4085 "exim: you lack sufficient privilege to specify syslog process name\n");
4087 /* Paranoia check of maximum lengths of certain strings. There is a check
4088 on the length of the log file path in log.c, which will come into effect
4089 if there are any calls to write the log earlier than this. However, if we
4090 get this far but the string is very long, it is better to stop now than to
4091 carry on and (e.g.) receive a message and then have to collapse. The call to
4092 log_write() from here will cause the ultimate panic collapse if the complete
4093 file name exceeds the buffer length. */
4095 if (Ustrlen(log_file_path) > 200)
4096 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4097 "log_file_path is longer than 200 chars: aborting");
4099 if (Ustrlen(pid_file_path) > 200)
4100 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4101 "pid_file_path is longer than 200 chars: aborting");
4103 if (Ustrlen(spool_directory) > 200)
4104 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4105 "spool_directory is longer than 200 chars: aborting");
4107 /* Length check on the process name given to syslog for its TAG field,
4108 which is only permitted to be 32 characters or less. See RFC 3164. */
4110 if (Ustrlen(syslog_processname) > 32)
4111 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
4112 "syslog_processname is longer than 32 chars: aborting");
4117 log_write(0, LOG_MAIN, "%s", log_oneline);
4118 return EXIT_SUCCESS;
4121 return EXIT_FAILURE;
4123 /* In some operating systems, the environment variable TMPDIR controls where
4124 temporary files are created; Exim doesn't use these (apart from when delivering
4125 to MBX mailboxes), but called libraries such as DBM libraries may require them.
4126 If TMPDIR is found in the environment, reset it to the value defined in the
4127 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
4128 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
4129 EXIM_TMPDIR by the build scripts.
4133 if (environ) for (uschar ** p = USS environ; *p; p++)
4134 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 && Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
4136 uschar * newp = store_malloc(Ustrlen(EXIM_TMPDIR) + 8);
4137 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
4139 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
4143 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
4144 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
4145 we may need to get rid of a bogus timezone setting. This can arise when Exim is
4146 called by a user who has set the TZ variable. This then affects the timestamps
4147 in log files and in Received: headers, and any created Date: header lines. The
4148 required timezone is settable in the configuration file, so nothing can be done
4149 about this earlier - but hopefully nothing will normally be logged earlier than
4150 this. We have to make a new environment if TZ is wrong, but don't bother if
4151 timestamps_utc is set, because then all times are in UTC anyway. */
4153 if (timezone_string && strcmpic(timezone_string, US"UTC") == 0)
4154 f.timestamps_utc = TRUE;
4157 uschar *envtz = US getenv("TZ");
4159 ? !timezone_string || Ustrcmp(timezone_string, envtz) != 0
4160 : timezone_string != NULL
4163 uschar **p = USS environ;
4167 if (environ) while (*p++) count++;
4168 if (!envtz) count++;
4169 newp = new = store_malloc(sizeof(uschar *) * (count + 1));
4170 if (environ) for (p = USS environ; *p; p++)
4171 if (Ustrncmp(*p, "TZ=", 3) != 0) *newp++ = *p;
4172 if (timezone_string)
4174 *newp = store_malloc(Ustrlen(timezone_string) + 4);
4175 sprintf(CS *newp++, "TZ=%s", timezone_string);
4180 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
4181 tod_stamp(tod_log));
4185 /* Handle the case when we have removed the setuid privilege because of -C or
4186 -D. This means that the caller of Exim was not root.
4188 There is a problem if we were running as the Exim user. The sysadmin may
4189 expect this case to retain privilege because "the binary was called by the
4190 Exim user", but it hasn't, because either the -D option set macros, or the
4191 -C option set a non-trusted configuration file. There are two possibilities:
4193 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
4194 to do message deliveries. Thus, the fact that it is running as a
4195 non-privileged user is plausible, and might be wanted in some special
4196 configurations. However, really_exim will have been set false when
4197 privilege was dropped, to stop Exim trying to write to its normal log
4198 files. Therefore, re-enable normal log processing, assuming the sysadmin
4199 has set up the log directory correctly.
4201 (2) If deliver_drop_privilege is not set, the configuration won't work as
4202 apparently intended, and so we log a panic message. In order to retain
4203 root for -C or -D, the caller must either be root or be invoking a
4204 trusted configuration file (when deliver_drop_privilege is false). */
4206 if ( removed_privilege
4207 && (!f.trusted_config || opt_D_used)
4208 && real_uid == exim_uid)
4209 if (deliver_drop_privilege)
4210 f.really_exim = TRUE; /* let logging work normally */
4212 log_write(0, LOG_MAIN|LOG_PANIC,
4213 "exim user lost privilege for using %s option",
4214 f.trusted_config? "-D" : "-C");
4216 /* Start up Perl interpreter if Perl support is configured and there is a
4217 perl_startup option, and the configuration or the command line specifies
4218 initializing starting. Note that the global variables are actually called
4219 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4222 if (perl_start_option != 0)
4223 opt_perl_at_start = (perl_start_option > 0);
4224 if (opt_perl_at_start && opt_perl_startup != NULL)
4227 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4228 if ((errstr = init_perl(opt_perl_startup)))
4229 exim_fail("exim: error in perl_startup code: %s\n", errstr);
4230 opt_perl_started = TRUE;
4232 #endif /* EXIM_PERL */
4234 /* Log the arguments of the call if the configuration file said so. This is
4235 a debugging feature for finding out what arguments certain MUAs actually use.
4236 Don't attempt it if logging is disabled, or if listing variables or if
4237 verifying/testing addresses or expansions. */
4239 if ( (debug_selector & D_any || LOGGING(arguments))
4240 && f.really_exim && !list_options && !checking)
4242 uschar *p = big_buffer;
4243 Ustrcpy(p, US"cwd= (failed)");
4250 snprintf(CS p, big_buffer_size - (p - big_buffer), "%s", CCS initial_cwd);
4251 p += Ustrlen(CCS p);
4254 (void)string_format(p, big_buffer_size - (p - big_buffer), " %d args:", argc);
4256 for (int i = 0; i < argc; i++)
4258 int len = Ustrlen(argv[i]);
4259 const uschar *printing;
4261 if (p + len + 8 >= big_buffer + big_buffer_size)
4263 Ustrcpy(p, US" ...");
4264 log_write(0, LOG_MAIN, "%s", big_buffer);
4265 Ustrcpy(big_buffer, US"...");
4268 printing = string_printing(argv[i]);
4269 if (!*printing) quote = US"\"";
4272 const uschar *pp = printing;
4274 while (*pp) if (isspace(*pp++)) { quote = US"\""; break; }
4276 p += sprintf(CS p, " %s%.*s%s", quote, (int)(big_buffer_size -
4277 (p - big_buffer) - 4), printing, quote);
4280 if (LOGGING(arguments))
4281 log_write(0, LOG_MAIN, "%s", big_buffer);
4283 debug_printf("%s\n", big_buffer);
4286 /* Set the working directory to be the top-level spool directory. We don't rely
4287 on this in the code, which always uses fully qualified names, but it's useful
4288 for core dumps etc. Don't complain if it fails - the spool directory might not
4289 be generally accessible and calls with the -C option (and others) have lost
4290 privilege by now. Before the chdir, we try to ensure that the directory exists.
4293 if (Uchdir(spool_directory) != 0)
4295 (void) directory_make(spool_directory, US"", SPOOL_DIRECTORY_MODE, FALSE);
4296 (void) Uchdir(spool_directory);
4299 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4300 alias file. Exim doesn't have such a concept, but this call is screwed into
4301 Sun's YP makefiles. Handle this by calling a configured script, as the real
4302 user who called Exim. The -oA option can be used to pass an argument to the
4307 (void) fclose(config_file);
4308 if (bi_command && *bi_command)
4312 argv[i++] = bi_command;
4313 if (alias_arg) argv[i++] = alias_arg;
4316 setgroups(group_count, group_list);
4317 exim_setugid(real_uid, real_gid, FALSE, US"running bi_command");
4319 DEBUG(D_exec) debug_printf("exec '%.256s' %s%.256s%s\n", argv[0],
4320 argv[1] ? "'" : "", argv[1] ? argv[1] : US"", argv[1] ? "'" : "");
4322 execv(CS argv[0], (char *const *)argv);
4323 exim_fail("exim: exec '%s' failed: %s\n", argv[0], strerror(errno));
4327 DEBUG(D_any) debug_printf("-bi used but bi_command not set; exiting\n");
4332 /* We moved the admin/trusted check to be immediately after reading the
4333 configuration file. We leave these prints here to ensure that syslog setup,
4334 logfile setup, and so on has already happened. */
4336 if (f.trusted_caller) DEBUG(D_any) debug_printf("trusted user\n");
4337 if (f.admin_user) DEBUG(D_any) debug_printf("admin user\n");
4339 /* Only an admin user may start the daemon or force a queue run in the default
4340 configuration, but the queue run restriction can be relaxed. Only an admin
4341 user may request that a message be returned to its sender forthwith. Only an
4342 admin user may specify a debug level greater than D_v (because it might show
4343 passwords, etc. in lookup queries). Only an admin user may request a queue
4344 count. Only an admin user can use the test interface to scan for email
4345 (because Exim will be in the spool dir and able to look at mails). */
4349 BOOL debugset = (debug_selector & ~D_v) != 0;
4350 if ( deliver_give_up || f.daemon_listen || malware_test_file
4351 || count_queue && queue_list_requires_admin
4352 || list_queue && queue_list_requires_admin
4353 || queue_interval >= 0 && prod_requires_admin
4354 || queue_name_dest && prod_requires_admin
4355 || debugset && !f.running_in_test_harness
4357 exim_fail("exim:%s permission denied\n", debugset ? " debugging" : "");
4360 /* If the real user is not root or the exim uid, the argument for passing
4361 in an open TCP/IP connection for another message is not permitted, nor is
4362 running with the -N option for any delivery action, unless this call to exim is
4363 one that supplied an input message, or we are using a patched exim for
4364 regression testing. */
4366 if ( real_uid != root_uid && real_uid != exim_uid
4367 && ( continue_hostname
4369 && (queue_interval >= 0 || f.daemon_listen || msg_action_arg > 0)
4371 && !f.running_in_test_harness
4373 exim_fail("exim: Permission denied\n");
4375 /* If the caller is not trusted, certain arguments are ignored when running for
4376 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4377 Note that authority for performing certain actions on messages is tested in the
4378 queue_action() function. */
4380 if (!f.trusted_caller && !checking)
4382 sender_host_name = sender_host_address = interface_address =
4383 sender_ident = received_protocol = NULL;
4384 sender_host_port = interface_port = 0;
4385 sender_host_authenticated = authenticated_sender = authenticated_id = NULL;
4388 /* If a sender host address is set, extract the optional port number off the
4389 end of it and check its syntax. Do the same thing for the interface address.
4390 Exim exits if the syntax is bad. */
4394 if (sender_host_address)
4395 sender_host_port = check_port(sender_host_address);
4396 if (interface_address)
4397 interface_port = check_port(interface_address);
4400 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4403 if (f.trusted_caller)
4405 f.suppress_local_fixups = f.suppress_local_fixups_default = TRUE;
4406 DEBUG(D_acl) debug_printf("suppress_local_fixups forced on by -G\n");
4409 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4412 /* If an SMTP message is being received check to see if the standard input is a
4413 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4414 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4419 union sockaddr_46 inetd_sock;
4420 EXIM_SOCKLEN_T size = sizeof(inetd_sock);
4421 if (getpeername(0, (struct sockaddr *)(&inetd_sock), &size) == 0)
4423 int family = ((struct sockaddr *)(&inetd_sock))->sa_family;
4424 if (family == AF_INET || family == AF_INET6)
4426 union sockaddr_46 interface_sock;
4427 size = sizeof(interface_sock);
4429 if (getsockname(0, (struct sockaddr *)(&interface_sock), &size) == 0)
4430 interface_address = host_ntoa(-1, &interface_sock, NULL,
4433 if (host_is_tls_on_connect_port(interface_port)) tls_in.on_connect = TRUE;
4435 if (real_uid == root_uid || real_uid == exim_uid || interface_port < 1024)
4438 sender_host_address = host_ntoa(-1, (struct sockaddr *)(&inetd_sock),
4439 NULL, &sender_host_port);
4440 if (mua_wrapper) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Input from "
4441 "inetd is not supported when mua_wrapper is set");
4445 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4450 /* If the load average is going to be needed while receiving a message, get it
4451 now for those OS that require the first call to os_getloadavg() to be done as
4452 root. There will be further calls later for each message received. */
4454 #ifdef LOAD_AVG_NEEDS_ROOT
4455 if ( receiving_message
4456 && (queue_only_load >= 0 || (f.is_inetd && smtp_load_reserve >= 0)))
4457 load_average = OS_GETLOADAVG();
4460 /* The queue_only configuration option can be overridden by -odx on the command
4461 line, except that if queue_only_override is false, queue_only cannot be unset
4462 from the command line. */
4464 if (queue_only_set && (queue_only_override || arg_queue_only))
4465 queue_only = arg_queue_only;
4467 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4470 if (arg_receive_timeout >= 0) receive_timeout = arg_receive_timeout;
4471 if (arg_smtp_receive_timeout >= 0)
4472 smtp_receive_timeout = arg_smtp_receive_timeout;
4474 /* If Exim was started with root privilege, unless we have already removed the
4475 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4476 except when starting the daemon or doing some kind of delivery or address
4477 testing (-bt). These are the only cases when root need to be retained. We run
4478 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4479 retained only for starting the daemon. We always do the initgroups() in this
4480 situation (controlled by the TRUE below), in order to be as close as possible
4481 to the state Exim usually runs in. */
4483 if ( !unprivileged /* originally had root AND */
4484 && !removed_privilege /* still got root AND */
4485 && !f.daemon_listen /* not starting the daemon */
4486 && queue_interval <= 0 /* (either kind of daemon) */
4487 && ( /* AND EITHER */
4488 deliver_drop_privilege /* requested unprivileged */
4490 queue_interval < 0 /* not running the queue */
4491 && ( msg_action_arg < 0 /* and */
4492 || msg_action != MSG_DELIVER /* not delivering */
4494 && (!checking || !f.address_test_mode) /* not address checking */
4495 && !rcpt_verify_quota /* and not quota checking */
4497 exim_setugid(exim_uid, exim_gid, TRUE, US"privilege not needed");
4499 /* When we are retaining a privileged uid, we still change to the exim gid. */
4504 DEBUG(D_any) debug_printf("dropping to exim gid; retaining priv uid\n");
4505 rv = setgid(exim_gid);
4506 /* Impact of failure is that some stuff might end up with an incorrect group.
4507 We track this for failures from root, since any attempt to change privilege
4508 by root should succeed and failures should be examined. For non-root,
4509 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4510 no need to complain then. */
4512 if (!(unprivileged || removed_privilege))
4513 exim_fail("exim: changing group failed: %s\n", strerror(errno));
4516 DEBUG(D_any) debug_printf("changing group to %ld failed: %s\n",
4517 (long int)exim_gid, strerror(errno));
4521 /* Handle a request to scan a file for malware */
4522 if (malware_test_file)
4524 #ifdef WITH_CONTENT_SCAN
4526 set_process_info("scanning file for malware");
4527 if ((result = malware_in_file(malware_test_file)) == FAIL)
4529 printf("No malware found.\n");
4534 printf("Malware lookup returned non-okay/fail: %d\n", result);
4538 printf("Malware found: %s\n", malware_name);
4540 printf("Malware scan detected malware of unknown name.\n");
4542 printf("Malware scanning not enabled at compile time.\n");
4547 /* Handle a request to list the delivery queue */
4551 set_process_info("listing the queue");
4552 queue_list(list_queue_option, argv + recipients_arg, argc - recipients_arg);
4556 /* Handle a request to count the delivery queue */
4560 set_process_info("counting the queue");
4561 fprintf(stdout, "%u\n", queue_count());
4565 /* Handle actions on specific messages, except for the force delivery and
4566 message load actions, which are done below. Some actions take a whole list of
4567 message ids, which are known to continue up to the end of the arguments. Others
4568 take a single message id and then operate on the recipients list. */
4570 if (msg_action_arg > 0 && msg_action != MSG_DELIVER && msg_action != MSG_LOAD)
4572 int yield = EXIT_SUCCESS;
4573 set_process_info("acting on specified messages");
4575 /* ACL definitions may be needed when removing a message (-Mrm) because
4576 event_action gets expanded */
4578 if (msg_action == MSG_REMOVE)
4580 int old_pool = store_pool;
4581 store_pool = POOL_CONFIG;
4583 store_pool = old_pool;
4584 store_writeprotect(POOL_CONFIG);
4587 if (!one_msg_action)
4589 for (i = msg_action_arg; i < argc; i++)
4590 if (!queue_action(argv[i], msg_action, NULL, 0, 0))
4591 yield = EXIT_FAILURE;
4594 case MSG_REMOVE: case MSG_FREEZE: case MSG_THAW: break;
4595 default: printf("\n"); break;
4599 else if (!queue_action(argv[msg_action_arg], msg_action, argv, argc,
4600 recipients_arg)) yield = EXIT_FAILURE;
4604 /* We used to set up here to skip reading the ACL section, on
4605 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4606 Now, since the intro of the ${acl } expansion, ACL definitions may be
4607 needed in transports so we lost the optimisation. */
4610 int old_pool = store_pool;
4611 #ifdef MEASURE_TIMING
4612 struct timeval t0, diff;
4613 (void)gettimeofday(&t0, NULL);
4616 store_pool = POOL_CONFIG;
4618 store_pool = old_pool;
4620 /* -be can add macro definitions, needing to link to the macro structure
4621 chain. Otherwise, make the memory used for config data readonly. */
4623 if (!expansion_test)
4624 store_writeprotect(POOL_CONFIG);
4626 #ifdef MEASURE_TIMING
4627 report_time_since(&t0, US"readconf_rest (delta)");
4631 /* Handle a request to check quota */
4632 if (rcpt_verify_quota)
4633 if (real_uid != root_uid && real_uid != exim_uid)
4634 exim_fail("exim: Permission denied\n");
4635 else if (recipients_arg >= argc)
4636 exim_fail("exim: missing recipient for quota check\n");
4639 verify_quota(argv[recipients_arg]);
4640 exim_exit(EXIT_SUCCESS);
4643 /* Handle the -brt option. This is for checking out retry configurations.
4644 The next three arguments are a domain name or a complete address, and
4645 optionally two error numbers. All it does is to call the function that
4646 scans the retry configuration data. */
4648 if (test_retry_arg >= 0)
4650 retry_config *yield;
4651 int basic_errno = 0;
4653 const uschar *s1, *s2;
4655 if (test_retry_arg >= argc)
4657 printf("-brt needs a domain or address argument\n");
4658 exim_exit(EXIT_FAILURE);
4660 s1 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_EMAILADDR_MAX, "-brt");
4663 /* If the first argument contains no @ and no . it might be a local user
4664 or it might be a single-component name. Treat as a domain. */
4666 if (Ustrchr(s1, '@') == NULL && Ustrchr(s1, '.') == NULL)
4668 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4669 "being \ntreated as a one-component domain, not as a local part.\n\n",
4673 /* There may be an optional second domain arg. */
4675 if (test_retry_arg < argc && Ustrchr(argv[test_retry_arg], '.') != NULL)
4676 s2 = exim_str_fail_toolong(argv[test_retry_arg++], EXIM_DOMAINNAME_MAX, "-brt 2nd");
4678 /* The final arg is an error name */
4680 if (test_retry_arg < argc)
4682 const uschar *ss = exim_str_fail_toolong(argv[test_retry_arg], EXIM_DRIVERNAME_MAX, "-brt 3rd");
4684 readconf_retry_error(ss, ss + Ustrlen(ss), &basic_errno, &more_errno);
4687 printf("%s\n", CS error);
4688 return EXIT_FAILURE;
4691 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4692 code > 100 as an error is for matching codes to the decade. Turn them into
4693 a real error code, off the decade. */
4695 if (basic_errno == ERRNO_MAIL4XX ||
4696 basic_errno == ERRNO_RCPT4XX ||
4697 basic_errno == ERRNO_DATA4XX)
4699 int code = (more_errno >> 8) & 255;
4701 more_errno = (more_errno & 0xffff00ff) | (21 << 8);
4702 else if (code > 100)
4703 more_errno = (more_errno & 0xffff00ff) | ((code - 96) << 8);
4707 if (!(yield = retry_find_config(s1, s2, basic_errno, more_errno)))
4708 printf("No retry information found\n");
4711 more_errno = yield->more_errno;
4712 printf("Retry rule: %s ", yield->pattern);
4714 if (yield->basic_errno == ERRNO_EXIMQUOTA)
4716 printf("quota%s%s ",
4717 (more_errno > 0)? "_" : "",
4718 (more_errno > 0)? readconf_printtime(more_errno) : US"");
4720 else if (yield->basic_errno == ECONNREFUSED)
4722 printf("refused%s%s ",
4723 (more_errno > 0)? "_" : "",
4724 (more_errno == 'M')? "MX" :
4725 (more_errno == 'A')? "A" : "");
4727 else if (yield->basic_errno == ETIMEDOUT)
4730 if ((more_errno & RTEF_CTOUT) != 0) printf("_connect");
4732 if (more_errno != 0) printf("_%s",
4733 (more_errno == 'M')? "MX" : "A");
4736 else if (yield->basic_errno == ERRNO_AUTHFAIL)
4737 printf("auth_failed ");
4740 for (retry_rule * r = yield->rules; r; r = r->next)
4742 printf("%c,%s", r->rule, readconf_printtime(r->timeout)); /* Do not */
4743 printf(",%s", readconf_printtime(r->p1)); /* amalgamate */
4749 printf(",%d.", x/1000);
4763 exim_exit(EXIT_SUCCESS);
4766 /* Handle a request to list one or more configuration options */
4767 /* If -n was set, we suppress some information */
4772 set_process_info("listing variables");
4773 if (recipients_arg >= argc)
4774 fail = !readconf_print(US"all", NULL, flag_n);
4775 else for (i = recipients_arg; i < argc; i++)
4778 (Ustrcmp(argv[i], "router") == 0 ||
4779 Ustrcmp(argv[i], "transport") == 0 ||
4780 Ustrcmp(argv[i], "authenticator") == 0 ||
4781 Ustrcmp(argv[i], "macro") == 0 ||
4782 Ustrcmp(argv[i], "environment") == 0))
4784 fail |= !readconf_print(exim_str_fail_toolong(argv[i+1], EXIM_DRIVERNAME_MAX, "-bP name"), argv[i], flag_n);
4788 fail = !readconf_print(exim_str_fail_toolong(argv[i], EXIM_DRIVERNAME_MAX, "-bP item"), NULL, flag_n);
4790 exim_exit(fail ? EXIT_FAILURE : EXIT_SUCCESS);
4795 set_process_info("listing config");
4796 exim_exit(readconf_print(US"config", NULL, flag_n)
4797 ? EXIT_SUCCESS : EXIT_FAILURE);
4801 /* Initialise subsystems as required. */
4805 /* Handle a request to deliver one or more messages that are already on the
4806 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4807 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4809 Delivery of specific messages is typically used for a small number when
4810 prodding by hand (when the option forced_delivery will be set) or when
4811 re-execing to regain root privilege. Each message delivery must happen in a
4812 separate process, so we fork a process for each one, and run them sequentially
4813 so that debugging output doesn't get intertwined, and to avoid spawning too
4814 many processes if a long list is given. However, don't fork for the last one;
4815 this saves a process in the common case when Exim is called to deliver just one
4818 if (msg_action_arg > 0 && msg_action != MSG_LOAD)
4820 if (prod_requires_admin && !f.admin_user)
4822 fprintf(stderr, "exim: Permission denied\n");
4823 exim_exit(EXIT_FAILURE);
4825 set_process_info("delivering specified messages");
4826 if (deliver_give_up) forced_delivery = f.deliver_force_thaw = TRUE;
4827 for (i = msg_action_arg; i < argc; i++)
4831 /*XXX This use of argv[i] for msg_id should really be tainted, but doing
4832 that runs into a later copy into the untainted global message_id[] */
4833 /*XXX Do we need a length limit check here? */
4835 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4836 else if ((pid = exim_fork(US"cmdline-delivery")) == 0)
4838 (void)deliver_message(argv[i], forced_delivery, deliver_give_up);
4839 exim_underbar_exit(EXIT_SUCCESS);
4843 fprintf(stderr, "failed to fork delivery process for %s: %s\n", argv[i],
4845 exim_exit(EXIT_FAILURE);
4849 exim_exit(EXIT_SUCCESS);
4853 /* If only a single queue run is requested, without SMTP listening, we can just
4854 turn into a queue runner, with an optional starting message id. */
4856 if (queue_interval == 0 && !f.daemon_listen)
4858 DEBUG(D_queue_run) debug_printf("Single queue run%s%s%s%s\n",
4859 start_queue_run_id ? US" starting at " : US"",
4860 start_queue_run_id ? start_queue_run_id: US"",
4861 stop_queue_run_id ? US" stopping at " : US"",
4862 stop_queue_run_id ? stop_queue_run_id : US"");
4864 set_process_info("running the '%s' queue (single queue run)", queue_name);
4866 set_process_info("running the queue (single queue run)");
4867 queue_run(start_queue_run_id, stop_queue_run_id, FALSE);
4868 exim_exit(EXIT_SUCCESS);
4872 /* Find the login name of the real user running this process. This is always
4873 needed when receiving a message, because it is written into the spool file. It
4874 may also be used to construct a from: or a sender: header, and in this case we
4875 need the user's full name as well, so save a copy of it, checked for RFC822
4876 syntax and munged if necessary, if it hasn't previously been set by the -F
4877 argument. We may try to get the passwd entry more than once, in case NIS or
4878 other delays are in evidence. Save the home directory for use in filter testing
4883 if ((pw = getpwuid(real_uid)) != NULL)
4885 originator_login = string_copy(US pw->pw_name);
4886 originator_home = string_copy(US pw->pw_dir);
4888 /* If user name has not been set by -F, set it from the passwd entry
4889 unless -f has been used to set the sender address by a trusted user. */
4891 if (!originator_name)
4893 if (!sender_address || (!f.trusted_caller && filter_test == FTEST_NONE))
4895 uschar *name = US pw->pw_gecos;
4896 uschar *amp = Ustrchr(name, '&');
4899 /* Most Unix specify that a '&' character in the gecos field is
4900 replaced by a copy of the login name, and some even specify that
4901 the first character should be upper cased, so that's what we do. */
4906 string_format(buffer, sizeof(buffer), "%.*s%n%s%s",
4907 (int)(amp - name), name, &loffset, originator_login, amp + 1);
4908 buffer[loffset] = toupper(buffer[loffset]);
4912 /* If a pattern for matching the gecos field was supplied, apply
4913 it and then expand the name string. */
4915 if (gecos_pattern && gecos_name)
4917 const pcre2_code *re;
4918 re = regex_must_compile(gecos_pattern, FALSE, TRUE); /* Use malloc */
4920 if (regex_match_and_setup(re, name, 0, -1))
4922 uschar *new_name = expand_string(gecos_name);
4926 DEBUG(D_receive) debug_printf("user name \"%s\" extracted from "
4927 "gecos field \"%s\"\n", new_name, name);
4930 else DEBUG(D_receive) debug_printf("failed to expand gecos_name string "
4931 "\"%s\": %s\n", gecos_name, expand_string_message);
4933 else DEBUG(D_receive) debug_printf("gecos_pattern \"%s\" did not match "
4934 "gecos field \"%s\"\n", gecos_pattern, name);
4935 store_free((void *)re);
4937 originator_name = string_copy(name);
4940 /* A trusted caller has used -f but not -F */
4942 else originator_name = US"";
4945 /* Break the retry loop */
4950 if (++i > finduser_retries) break;
4954 /* If we cannot get a user login, log the incident and give up, unless the
4955 configuration specifies something to use. When running in the test harness,
4956 any setting of unknown_login overrides the actual name. */
4958 if (!originator_login || f.running_in_test_harness)
4962 originator_login = expand_string(unknown_login);
4963 if (!originator_name && unknown_username)
4964 originator_name = expand_string(unknown_username);
4965 if (!originator_name) originator_name = US"";
4967 if (!originator_login)
4968 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Failed to get user name for uid %d",
4972 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4975 originator_name = US parse_fix_phrase(originator_name, Ustrlen(originator_name));
4977 /* If a message is created by this call of Exim, the uid/gid of its originator
4978 are those of the caller. These values are overridden if an existing message is
4979 read in from the spool. */
4981 originator_uid = real_uid;
4982 originator_gid = real_gid;
4984 DEBUG(D_receive) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4985 (int)originator_uid, (int)originator_gid, originator_login, originator_name);
4987 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4988 returns. We leave this till here so that the originator_ fields are available
4989 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4992 if (f.daemon_listen || f.inetd_wait_mode || queue_interval > 0)
4996 fprintf(stderr, "Daemon cannot be run when mua_wrapper is set\n");
4997 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "Daemon cannot be run when "
4998 "mua_wrapper is set");
5001 # ifndef DISABLE_TLS
5002 /* This also checks that the library linkage is working and we can call
5003 routines in it, so call even if tls_require_ciphers is unset */
5005 # ifdef MEASURE_TIMING
5006 struct timeval t0, diff;
5007 (void)gettimeofday(&t0, NULL);
5009 if (!tls_dropprivs_validate_require_cipher(FALSE))
5011 # ifdef MEASURE_TIMING
5012 report_time_since(&t0, US"validate_ciphers (delta)");
5020 /* If the sender ident has not been set (by a trusted caller) set it to
5021 the caller. This will get overwritten below for an inetd call. If a trusted
5022 caller has set it empty, unset it. */
5024 if (!sender_ident) sender_ident = originator_login;
5025 else if (!*sender_ident) sender_ident = NULL;
5027 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
5028 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
5029 originator_* variables set. */
5031 if (test_rewrite_arg >= 0)
5033 f.really_exim = FALSE;
5034 if (test_rewrite_arg >= argc)
5036 printf("-brw needs an address argument\n");
5037 exim_exit(EXIT_FAILURE);
5039 rewrite_test(exim_str_fail_toolong(argv[test_rewrite_arg], EXIM_EMAILADDR_MAX, "-brw"));
5040 exim_exit(EXIT_SUCCESS);
5043 /* A locally-supplied message is considered to be coming from a local user
5044 unless a trusted caller supplies a sender address with -f, or is passing in the
5045 message via SMTP (inetd invocation or otherwise). */
5047 if ( !sender_address && !smtp_input
5048 || !f.trusted_caller && filter_test == FTEST_NONE)
5050 f.sender_local = TRUE;
5052 /* A trusted caller can supply authenticated_sender and authenticated_id
5053 via -oMas and -oMai and if so, they will already be set. Otherwise, force
5054 defaults except when host checking. */
5056 if (!authenticated_sender && !host_checking)
5057 authenticated_sender = string_sprintf("%s@%s", originator_login,
5058 qualify_domain_sender);
5059 if (!authenticated_id && !host_checking)
5060 authenticated_id = originator_login;
5063 /* Trusted callers are always permitted to specify the sender address.
5064 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
5065 is specified is the empty address. However, if a trusted caller does not
5066 specify a sender address for SMTP input, we leave sender_address unset. This
5067 causes the MAIL commands to be honoured. */
5069 if ( !smtp_input && !sender_address
5070 || !receive_check_set_sender(sender_address))
5072 /* Either the caller is not permitted to set a general sender, or this is
5073 non-SMTP input and the trusted caller has not set a sender. If there is no
5074 sender, or if a sender other than <> is set, override with the originator's
5075 login (which will get qualified below), except when checking things. */
5077 if ( !sender_address /* No sender_address set */
5079 (sender_address[0] != 0 && /* Non-empty sender address, AND */
5080 !checking)) /* Not running tests, including filter tests */
5082 sender_address = originator_login;
5083 f.sender_address_forced = FALSE;
5084 sender_address_domain = 0;
5088 /* Remember whether an untrusted caller set the sender address */
5090 f.sender_set_untrusted = sender_address != originator_login && !f.trusted_caller;
5092 /* Ensure that the sender address is fully qualified unless it is the empty
5093 address, which indicates an error message, or doesn't exist (root caller, smtp
5094 interface, no -f argument). */
5096 if (sender_address && *sender_address && sender_address_domain == 0)
5097 sender_address = string_sprintf("%s@%s", local_part_quote(sender_address),
5098 qualify_domain_sender);
5100 DEBUG(D_receive) debug_printf("sender address = %s\n", sender_address);
5102 /* Handle a request to verify a list of addresses, or test them for delivery.
5103 This must follow the setting of the sender address, since routers can be
5104 predicated upon the sender. If no arguments are given, read addresses from
5105 stdin. Set debug_level to at least D_v to get full output for address testing.
5108 if (verify_address_mode || f.address_test_mode)
5111 int flags = vopt_qualify;
5113 if (verify_address_mode)
5115 if (!verify_as_sender) flags |= vopt_is_recipient;
5116 DEBUG(D_verify) debug_print_ids(US"Verifying:");
5121 flags |= vopt_is_recipient;
5122 debug_selector |= D_v;
5123 debug_file = stderr;
5124 debug_fd = fileno(debug_file);
5125 DEBUG(D_verify) debug_print_ids(US"Address testing:");
5128 if (recipients_arg < argc)
5129 while (recipients_arg < argc)
5131 /* Supplied addresses are tainted since they come from a user */
5132 uschar * s = string_copy_taint(exim_str_fail_toolong(argv[recipients_arg++], EXIM_DISPLAYMAIL_MAX, "address verification"), TRUE);
5135 BOOL finished = FALSE;
5136 uschar *ss = parse_find_address_end(s, FALSE);
5137 if (*ss == ',') *ss = 0; else finished = TRUE;
5138 test_address(s, flags, &exit_value);
5141 while (*++s == ',' || isspace(*s)) ;
5147 uschar * s = get_stdinput(NULL, NULL);
5149 test_address(string_copy_taint(exim_str_fail_toolong(s, EXIM_DISPLAYMAIL_MAX, "address verification (stdin)"), TRUE), flags, &exit_value);
5153 exim_exit(exit_value);
5156 /* Handle expansion checking. Either expand items on the command line, or read
5157 from stdin if there aren't any. If -Mset was specified, load the message so
5158 that its variables can be used, but restrict this facility to admin users.
5159 Otherwise, if -bem was used, read a message from stdin. */
5163 dns_init(FALSE, FALSE, FALSE);
5164 if (msg_action_arg > 0 && msg_action == MSG_LOAD)
5168 exim_fail("exim: permission denied\n");
5169 message_id = US exim_str_fail_toolong(argv[msg_action_arg], MESSAGE_ID_LENGTH, "message-id");
5170 /* Checking the length of the ID is sufficient to validate it.
5171 Get an untainted version so file opens can be done. */
5172 message_id = string_copy_taint(message_id, FALSE);
5174 spoolname = string_sprintf("%s-H", message_id);
5175 if ((deliver_datafile = spool_open_datafile(message_id)) < 0)
5176 printf ("Failed to load message datafile %s\n", message_id);
5177 if (spool_read_header(spoolname, TRUE, FALSE) != spool_read_OK)
5178 printf ("Failed to load message %s\n", message_id);
5181 /* Read a test message from a file. We fudge it up to be on stdin, saving
5182 stdin itself for later reading of expansion strings. */
5184 else if (expansion_test_message)
5186 int save_stdin = dup(0);
5187 int fd = Uopen(expansion_test_message, O_RDONLY, 0);
5189 exim_fail("exim: failed to open %s: %s\n", expansion_test_message,
5192 filter_test = FTEST_USER; /* Fudge to make it look like filter test */
5193 message_ended = END_NOTENDED;
5194 read_message_body(receive_msg(extract_recipients));
5195 message_linecount += body_linecount;
5196 (void)dup2(save_stdin, 0);
5197 (void)close(save_stdin);
5198 clearerr(stdin); /* Required by Darwin */
5201 /* Only admin users may see config-file macros this way */
5203 if (!f.admin_user) macros_user = macros = mlast = NULL;
5205 /* Allow $recipients for this testing */
5207 f.enable_dollar_recipients = TRUE;
5209 /* Expand command line items */
5211 if (recipients_arg < argc)
5212 while (recipients_arg < argc)
5213 expansion_test_line(exim_str_fail_toolong(argv[recipients_arg++], EXIM_EMAILADDR_MAX, "recipient"));
5219 char *(*fn_readline)(const char *) = NULL;
5220 void (*fn_addhist)(const char *) = NULL;
5224 void *dlhandle = set_readline(&fn_readline, &fn_addhist);
5227 while (s = get_stdinput(fn_readline, fn_addhist))
5228 expansion_test_line(s);
5231 if (dlhandle) dlclose(dlhandle);
5235 /* The data file will be open after -Mset */
5237 if (deliver_datafile >= 0)
5239 (void)close(deliver_datafile);
5240 deliver_datafile = -1;
5243 exim_exit(EXIT_SUCCESS);
5247 /* The active host name is normally the primary host name, but it can be varied
5248 for hosts that want to play several parts at once. We need to ensure that it is
5249 set for host checking, and for receiving messages. */
5251 smtp_active_hostname = primary_hostname;
5252 if (raw_active_hostname != NULL)
5254 uschar *nah = expand_string(raw_active_hostname);
5257 if (!f.expand_string_forcedfail)
5258 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand \"%s\" "
5259 "(smtp_active_hostname): %s", raw_active_hostname,
5260 expand_string_message);
5262 else if (nah[0] != 0) smtp_active_hostname = nah;
5265 /* Handle host checking: this facility mocks up an incoming SMTP call from a
5266 given IP address so that the blocking and relay configuration can be tested.
5267 Unless a sender_ident was set by -oMt, we discard it (the default is the
5268 caller's login name). An RFC 1413 call is made only if we are running in the
5269 test harness and an incoming interface and both ports are specified, because
5270 there is no TCP/IP call to find the ident for. */
5277 if (!sender_ident_set)
5279 sender_ident = NULL;
5280 if (f.running_in_test_harness && sender_host_port
5281 && interface_address && interface_port)
5282 verify_get_ident(1223); /* note hardwired port number */
5285 /* In case the given address is a non-canonical IPv6 address, canonicalize
5286 it. The code works for both IPv4 and IPv6, as it happens. */
5288 size = host_aton(sender_host_address, x);
5289 sender_host_address = store_get(48, FALSE); /* large enough for full IPv6 */
5290 (void)host_nmtoa(size, x, -1, sender_host_address, ':');
5292 /* Now set up for testing */
5294 host_build_sender_fullhost();
5298 f.sender_local = FALSE;
5299 f.sender_host_notsocket = TRUE;
5300 debug_file = stderr;
5301 debug_fd = fileno(debug_file);
5302 fprintf(stdout, "\n**** SMTP testing session as if from host %s\n"
5303 "**** but without any ident (RFC 1413) callback.\n"
5304 "**** This is not for real!\n\n",
5305 sender_host_address);
5307 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5308 if (verify_check_host(&hosts_connection_nolog) == OK)
5309 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5310 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5312 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5313 because a log line has already been written for all its failure exists
5314 (usually "connection refused: <reason>") and writing another one is
5315 unnecessary clutter. */
5317 if (smtp_start_session())
5320 for (; (reset_point = store_mark()); store_reset(reset_point))
5322 if (smtp_setup_msg() <= 0) break;
5323 if (!receive_msg(FALSE)) break;
5325 return_path = sender_address = NULL;
5326 dnslist_domain = dnslist_matched = NULL;
5327 #ifndef DISABLE_DKIM
5328 dkim_cur_signer = NULL;
5331 deliver_localpart_orig = NULL;
5332 deliver_domain_orig = NULL;
5333 callout_address = sending_ip_address = NULL;
5334 deliver_localpart_data = deliver_domain_data =
5335 recipient_data = sender_data = NULL;
5336 sender_rate = sender_rate_limit = sender_rate_period = NULL;
5340 exim_exit(EXIT_SUCCESS);
5344 /* Arrange for message reception if recipients or SMTP were specified;
5345 otherwise complain unless a version print (-bV) happened or this is a filter
5346 verification test or info dump.
5347 In the former case, show the configuration file name. */
5349 if (recipients_arg >= argc && !extract_recipients && !smtp_input)
5351 if (version_printed)
5353 if (Ustrchr(config_main_filelist, ':'))
5354 printf("Configuration file search path is %s\n", config_main_filelist);
5355 printf("Configuration file is %s\n", config_main_filename);
5356 return EXIT_SUCCESS;
5359 if (info_flag != CMDINFO_NONE)
5361 show_exim_information(info_flag, info_stdout ? stdout : stderr);
5362 return info_stdout ? EXIT_SUCCESS : EXIT_FAILURE;
5365 if (filter_test == FTEST_NONE)
5366 exim_usage(called_as);
5370 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5371 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5372 that we are not called from inetd, because that is rejected above. The
5373 following configuration settings are forced here:
5375 (1) Synchronous delivery (-odi)
5376 (2) Errors to stderr (-oep == -oeq)
5377 (3) No parallel remote delivery
5378 (4) Unprivileged delivery
5380 We don't force overall queueing options because there are several of them;
5381 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5382 to override any SMTP queueing. */
5386 f.synchronous_delivery = TRUE;
5387 arg_error_handling = ERRORS_STDERR;
5388 remote_max_parallel = 1;
5389 deliver_drop_privilege = TRUE;
5390 f.queue_smtp = FALSE;
5391 queue_smtp_domains = NULL;
5393 message_utf8_downconvert = -1; /* convert-if-needed */
5398 /* Prepare to accept one or more new messages on the standard input. When a
5399 message has been read, its id is returned in message_id[]. If doing immediate
5400 delivery, we fork a delivery process for each received message, except for the
5401 last one, where we can save a process switch.
5403 It is only in non-smtp mode that error_handling is allowed to be changed from
5404 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5405 sendmail error modes other than -oem ever actually used? Later: yes.) */
5407 if (!smtp_input) error_handling = arg_error_handling;
5409 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5410 logging being sent down the socket and make an identd call to get the
5413 else if (f.is_inetd)
5415 (void)fclose(stderr);
5416 exim_nullstd(); /* Re-open to /dev/null */
5417 verify_get_ident(IDENT_PORT);
5418 host_build_sender_fullhost();
5419 set_process_info("handling incoming connection from %s via inetd",
5423 /* If the sender host address has been set, build sender_fullhost if it hasn't
5424 already been done (which it will have been for inetd). This caters for the
5425 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5426 so that the test for IP options is skipped for -bs input. */
5428 if (sender_host_address && !sender_fullhost)
5430 host_build_sender_fullhost();
5431 set_process_info("handling incoming connection from %s via -oMa",
5433 f.sender_host_notsocket = TRUE;
5436 /* Otherwise, set the sender host as unknown except for inetd calls. This
5437 prevents host checking in the case of -bs not from inetd and also for -bS. */
5439 else if (!f.is_inetd) f.sender_host_unknown = TRUE;
5441 /* If stdout does not exist, then dup stdin to stdout. This can happen
5442 if exim is started from inetd. In this case fd 0 will be set to the socket,
5443 but fd 1 will not be set. This also happens for passed SMTP channels. */
5445 if (fstat(1, &statbuf) < 0) (void)dup2(0, 1);
5447 /* Set up the incoming protocol name and the state of the program. Root is
5448 allowed to force received protocol via the -oMr option above. If we have come
5449 via inetd, the process info has already been set up. We don't set
5450 received_protocol here for smtp input, as it varies according to
5451 batch/HELO/EHLO/AUTH/TLS. */
5455 if (!f.is_inetd) set_process_info("accepting a local %sSMTP message from <%s>",
5456 smtp_batched_input? "batched " : "",
5457 sender_address ? sender_address : originator_login);
5461 int old_pool = store_pool;
5462 store_pool = POOL_PERM;
5463 if (!received_protocol)
5464 received_protocol = string_sprintf("local%s", called_as);
5465 store_pool = old_pool;
5466 set_process_info("accepting a local non-SMTP message from <%s>",
5470 /* Initialize the session_local_queue-only flag (this will be ignored if
5471 mua_wrapper is set) */
5474 session_local_queue_only = queue_only;
5476 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5477 the spool if so configured. On failure, we must not attempt to send an error
5478 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5479 error code is given.) */
5481 if ((!smtp_input || smtp_batched_input) && !receive_check_fs(0))
5482 exim_fail("exim: insufficient disk space\n");
5484 /* If this is smtp input of any kind, real or batched, handle the start of the
5487 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5488 because a log line has already been written for all its failure exists
5489 (usually "connection refused: <reason>") and writing another one is
5490 unnecessary clutter. */
5496 memset(sender_host_cache, 0, sizeof(sender_host_cache));
5497 if (verify_check_host(&hosts_connection_nolog) == OK)
5498 BIT_CLEAR(log_selector, log_selector_size, Li_smtp_connection);
5499 log_write(L_smtp_connection, LOG_MAIN, "%s", smtp_get_connection_info());
5500 if (!smtp_start_session())
5503 exim_exit(EXIT_SUCCESS);
5507 /* Otherwise, set up the input size limit here and set no stdin stdio buffer
5508 (we handle buferring so as to have visibility of fill level). */
5512 thismessage_size_limit = expand_string_integer(message_size_limit, TRUE);
5513 if (expand_string_message)
5514 if (thismessage_size_limit == -1)
5515 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "failed to expand "
5516 "message_size_limit: %s", expand_string_message);
5518 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "invalid value for "
5519 "message_size_limit: %s", expand_string_message);
5521 setvbuf(stdin, NULL, _IONBF, 0);
5524 /* Loop for several messages when reading SMTP input. If we fork any child
5525 processes, we don't want to wait for them unless synchronous delivery is
5526 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5527 same as SIG_DFL, despite the fact that documentation often lists the default as
5528 "ignore". This is a confusing area. This is what I know:
5530 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5531 processes that complete simply to go away without ever becoming defunct. You
5532 can't then wait for them - but we don't want to wait for them in the
5533 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5534 happen for all OS (e.g. *BSD is different).
5536 But that's not the end of the story. Some (many? all?) systems have the
5537 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5538 has by default, so it seems that the difference is merely one of default
5539 (compare restarting vs non-restarting signals).
5541 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5542 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5543 of the loop below. Paranoia rules.
5545 February 2003: That's *still* not the end of the story. There are now versions
5546 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5547 process then calls waitpid(), a grumble is written to the system log, because
5548 this is logically inconsistent. In other words, it doesn't like the paranoia.
5549 As a consequence of this, the waitpid() below is now excluded if we are sure
5550 that SIG_IGN works. */
5552 if (!f.synchronous_delivery)
5555 struct sigaction act;
5556 act.sa_handler = SIG_IGN;
5557 sigemptyset(&(act.sa_mask));
5558 act.sa_flags = SA_NOCLDWAIT;
5559 sigaction(SIGCHLD, &act, NULL);
5561 signal(SIGCHLD, SIG_IGN);
5565 /* Save the current store pool point, for resetting at the start of
5566 each message, and save the real sender address, if any. */
5568 real_sender_address = sender_address;
5570 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5571 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5574 for (BOOL more = TRUE; more; )
5576 rmark reset_point = store_mark();
5579 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5580 input and build the recipients list, before calling receive_msg() to read the
5581 message proper. Whatever sender address is given in the SMTP transaction is
5582 often ignored for local senders - we use the actual sender, which is normally
5583 either the underlying user running this process or a -f argument provided by
5584 a trusted caller. It is saved in real_sender_address. The test for whether to
5585 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5590 if ((rc = smtp_setup_msg()) > 0)
5592 if (real_sender_address != NULL &&
5593 !receive_check_set_sender(sender_address))
5595 sender_address = raw_sender = real_sender_address;
5596 sender_address_unrewritten = NULL;
5599 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5600 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5601 the very end. The result of the ACL is ignored (as for other non-SMTP
5602 messages). It is run for its potential side effects. */
5604 if (smtp_batched_input && acl_not_smtp_start != NULL)
5606 uschar *user_msg, *log_msg;
5607 f.enable_dollar_recipients = TRUE;
5608 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5609 &user_msg, &log_msg);
5610 f.enable_dollar_recipients = FALSE;
5613 /* Now get the data for the message */
5615 more = receive_msg(extract_recipients);
5618 cancel_cutthrough_connection(TRUE, US"receive dropped");
5619 if (more) goto MORELOOP;
5620 smtp_log_no_mail(); /* Log no mail if configured */
5621 exim_exit(EXIT_FAILURE);
5626 cancel_cutthrough_connection(TRUE, US"message setup dropped");
5627 smtp_log_no_mail(); /* Log no mail if configured */
5628 exim_exit(rc ? EXIT_FAILURE : EXIT_SUCCESS);
5632 /* In the non-SMTP case, we have all the information from the command
5633 line, but must process it in case it is in the more general RFC822
5634 format, and in any case, to detect syntax errors. Also, it appears that
5635 the use of comma-separated lists as single arguments is common, so we
5636 had better support them. */
5641 int count = argc - recipients_arg;
5642 uschar **list = argv + recipients_arg;
5644 /* These options cannot be changed dynamically for non-SMTP messages */
5646 f.active_local_sender_retain = local_sender_retain;
5647 f.active_local_from_check = local_from_check;
5649 /* Save before any rewriting */
5651 raw_sender = string_copy(sender_address);
5653 /* Loop for each argument (supplied by user hence tainted) */
5655 for (int i = 0; i < count; i++)
5657 int start, end, domain;
5659 /* There can be multiple addresses, so EXIM_DISPLAYMAIL_MAX (tuned for 1) is too short.
5660 * We'll still want to cap it to something, just in case. */
5661 uschar * s = string_copy_taint(exim_str_fail_toolong(list[i], BIG_BUFFER_SIZE, "address argument"), TRUE);
5663 /* Loop for each comma-separated address */
5667 BOOL finished = FALSE;
5669 uschar *ss = parse_find_address_end(s, FALSE);
5671 if (*ss == ',') *ss = 0; else finished = TRUE;
5673 /* Check max recipients - if -t was used, these aren't recipients */
5675 if (recipients_max > 0 && ++rcount > recipients_max &&
5676 !extract_recipients)
5677 if (error_handling == ERRORS_STDERR)
5679 fprintf(stderr, "exim: too many recipients\n");
5680 exim_exit(EXIT_FAILURE);
5684 moan_to_sender(ERRMESS_TOOMANYRECIP, NULL, NULL, stdin, TRUE)?
5685 errors_sender_rc : EXIT_FAILURE;
5689 BOOL b = allow_utf8_domains;
5690 allow_utf8_domains = TRUE;
5693 parse_extract_address(s, &errmess, &start, &end, &domain, FALSE);
5697 if (string_is_utf8(recipient)) message_smtputf8 = TRUE;
5698 else allow_utf8_domains = b;
5703 if (domain == 0 && !f.allow_unqualified_recipient)
5706 errmess = US"unqualified recipient address not allowed";
5710 if (error_handling == ERRORS_STDERR)
5712 fprintf(stderr, "exim: bad recipient address \"%s\": %s\n",
5713 string_printing(list[i]), errmess);
5714 exim_exit(EXIT_FAILURE);
5720 eblock.text1 = string_printing(list[i]);
5721 eblock.text2 = errmess;
5723 moan_to_sender(ERRMESS_BADARGADDRESS, &eblock, NULL, stdin, TRUE)?
5724 errors_sender_rc : EXIT_FAILURE;
5727 receive_add_recipient(string_copy_taint(recipient, TRUE), -1);
5730 while (*(++s) != 0 && (*s == ',' || isspace(*s)));
5734 /* Show the recipients when debugging */
5738 if (sender_address) debug_printf("Sender: %s\n", sender_address);
5739 if (recipients_list)
5741 debug_printf("Recipients:\n");
5742 for (int i = 0; i < recipients_count; i++)
5743 debug_printf(" %s\n", recipients_list[i].address);
5747 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5748 ignored; rejecting here would just add complication, and it can just as
5749 well be done later. Allow $recipients to be visible in the ACL. */
5751 if (acl_not_smtp_start)
5753 uschar *user_msg, *log_msg;
5754 f.enable_dollar_recipients = TRUE;
5755 (void)acl_check(ACL_WHERE_NOTSMTP_START, NULL, acl_not_smtp_start,
5756 &user_msg, &log_msg);
5757 f.enable_dollar_recipients = FALSE;
5760 /* Pause for a while waiting for input. If none received in that time,
5761 close the logfile, if we had one open; then if we wait for a long-running
5762 datasource (months, in one use-case) log rotation will not leave us holding
5765 if (!receive_timeout)
5766 if (poll_one_fd(0, POLLIN, 30*60*1000) == 0) /* 30 minutes */
5769 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5770 will just read the headers for the message, and not write anything onto the
5773 message_ended = END_NOTENDED;
5774 more = receive_msg(extract_recipients);
5776 /* more is always FALSE here (not SMTP message) when reading a message
5777 for real; when reading the headers of a message for filter testing,
5778 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5780 if (!message_id[0]) exim_exit(EXIT_FAILURE);
5781 } /* Non-SMTP message reception */
5783 /* If this is a filter testing run, there are headers in store, but
5784 no message on the spool. Run the filtering code in testing mode, setting
5785 the domain to the qualify domain and the local part to the current user,
5786 unless they have been set by options. The prefix and suffix are left unset
5787 unless specified. The the return path is set to to the sender unless it has
5788 already been set from a return-path header in the message. */
5790 if (filter_test != FTEST_NONE)
5792 deliver_domain = ftest_domain ? ftest_domain : qualify_domain_recipient;
5793 deliver_domain_orig = deliver_domain;
5794 deliver_localpart = ftest_localpart ? US ftest_localpart : originator_login;
5795 deliver_localpart_orig = deliver_localpart;
5796 deliver_localpart_prefix = US ftest_prefix;
5797 deliver_localpart_suffix = US ftest_suffix;
5798 deliver_home = originator_home;
5802 printf("Return-path copied from sender\n");
5803 return_path = string_copy(sender_address);
5806 printf("Return-path = %s\n", (return_path[0] == 0)? US"<>" : return_path);
5807 printf("Sender = %s\n", (sender_address[0] == 0)? US"<>" : sender_address);
5809 receive_add_recipient(
5810 string_sprintf("%s%s%s@%s",
5811 ftest_prefix ? ftest_prefix : US"",
5813 ftest_suffix ? ftest_suffix : US"",
5814 deliver_domain), -1);
5816 printf("Recipient = %s\n", recipients_list[0].address);
5817 if (ftest_prefix) printf("Prefix = %s\n", ftest_prefix);
5818 if (ftest_suffix) printf("Suffix = %s\n", ftest_suffix);
5820 if (chdir("/")) /* Get away from wherever the user is running this from */
5822 DEBUG(D_receive) debug_printf("chdir(\"/\") failed\n");
5823 exim_exit(EXIT_FAILURE);
5826 /* Now we run either a system filter test, or a user filter test, or both.
5827 In the latter case, headers added by the system filter will persist and be
5828 available to the user filter. We need to copy the filter variables
5831 if (filter_test & FTEST_SYSTEM)
5832 if (!filter_runtest(filter_sfd, filter_test_sfile, TRUE, more))
5833 exim_exit(EXIT_FAILURE);
5835 memcpy(filter_sn, filter_n, sizeof(filter_sn));
5837 if (filter_test & FTEST_USER)
5838 if (!filter_runtest(filter_ufd, filter_test_ufile, FALSE, more))
5839 exim_exit(EXIT_FAILURE);
5841 exim_exit(EXIT_SUCCESS);
5844 /* Else act on the result of message reception. We should not get here unless
5845 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5846 will be TRUE. If it is not, check on the number of messages received in this
5849 if ( !session_local_queue_only
5850 && smtp_accept_queue_per_connection > 0
5851 && receive_messagecount > smtp_accept_queue_per_connection)
5853 session_local_queue_only = TRUE;
5854 queue_only_reason = 2;
5857 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5858 and queue_only_load is set, check that the load average is below it. If it is
5859 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5860 default), we put the whole session into queue_only mode. It then remains this
5861 way for any subsequent messages on the same SMTP connection. This is a
5862 deliberate choice; even though the load average may fall, it doesn't seem
5863 right to deliver later messages on the same call when not delivering earlier
5864 ones. However, there are odd cases where this is not wanted, so this can be
5865 changed by setting queue_only_load_latch false. */
5867 if (!(local_queue_only = session_local_queue_only) && queue_only_load >= 0)
5868 if ((local_queue_only = (load_average = OS_GETLOADAVG()) > queue_only_load))
5870 queue_only_reason = 3;
5871 if (queue_only_load_latch) session_local_queue_only = TRUE;
5874 /* If running as an MUA wrapper, all queueing options and freezing options
5878 local_queue_only = f.queue_only_policy = f.deliver_freeze = FALSE;
5880 /* Log the queueing here, when it will get a message id attached, but
5881 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5884 if (local_queue_only)
5886 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5887 switch(queue_only_reason)
5890 log_write(L_delay_delivery,
5891 LOG_MAIN, "no immediate delivery: more than %d messages "
5892 "received in one connection", smtp_accept_queue_per_connection);
5896 log_write(L_delay_delivery,
5897 LOG_MAIN, "no immediate delivery: load average %.2f",
5898 (double)load_average/1000.0);
5903 else if (f.queue_only_policy || f.deliver_freeze)
5904 cancel_cutthrough_connection(TRUE, US"no delivery; queueing");
5906 /* Else do the delivery unless the ACL or local_scan() called for queue only
5907 or froze the message. Always deliver in a separate process. A fork failure is
5908 not a disaster, as the delivery will eventually happen on a subsequent queue
5909 run. The search cache must be tidied before the fork, as the parent will
5910 do it before exiting. The child will trigger a lookup failure and
5911 thereby defer the delivery if it tries to use (for example) a cached ldap
5912 connection that the parent has called unbind on. */
5919 if ((pid = exim_fork(US"local-accept-delivery")) == 0)
5922 close_unwanted(); /* Close unwanted file descriptors and TLS */
5923 exim_nullstd(); /* Ensure std{in,out,err} exist */
5925 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5926 mode, deliver_drop_privilege is forced TRUE). */
5928 if (geteuid() != root_uid && !deliver_drop_privilege && !unprivileged)
5930 delivery_re_exec(CEE_EXEC_EXIT);
5931 /* Control does not return here. */
5934 /* No need to re-exec */
5936 rc = deliver_message(message_id, FALSE, FALSE);
5938 exim_underbar_exit(!mua_wrapper || rc == DELIVER_MUA_SUCCEEDED
5939 ? EXIT_SUCCESS : EXIT_FAILURE);
5944 cancel_cutthrough_connection(TRUE, US"delivery fork failed");
5945 log_write(0, LOG_MAIN|LOG_PANIC, "failed to fork automatic delivery "
5946 "process: %s", strerror(errno));
5950 release_cutthrough_connection(US"msg passed for delivery");
5952 /* In the parent, wait if synchronous delivery is required. This will
5953 always be the case in MUA wrapper mode. */
5955 if (f.synchronous_delivery)
5958 while (wait(&status) != pid);
5959 if ((status & 0x00ff) != 0)
5960 log_write(0, LOG_MAIN|LOG_PANIC,
5961 "process %d crashed with signal %d while delivering %s",
5962 (int)pid, status & 0x00ff, message_id);
5963 if (mua_wrapper && (status & 0xffff) != 0) exim_exit(EXIT_FAILURE);
5968 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5969 automatically reaps children (see comments above the loop), clear away any
5970 finished subprocesses here, in case there are lots of messages coming in
5971 from the same source. */
5973 #ifndef SIG_IGN_WORKS
5974 while (waitpid(-1, NULL, WNOHANG) > 0);
5978 return_path = sender_address = NULL;
5979 authenticated_sender = NULL;
5980 deliver_localpart_orig = NULL;
5981 deliver_domain_orig = NULL;
5982 deliver_host = deliver_host_address = NULL;
5983 dnslist_domain = dnslist_matched = NULL;
5984 #ifdef WITH_CONTENT_SCAN
5985 malware_name = NULL;
5987 callout_address = NULL;
5988 sending_ip_address = NULL;
5989 deliver_localpart_data = deliver_domain_data =
5990 recipient_data = sender_data = NULL;
5992 for(int i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
5994 store_reset(reset_point);
5997 exim_exit(EXIT_SUCCESS); /* Never returns */
5998 return 0; /* To stop compiler warning */