1 /*************************************************
2 * Exim - an Internet mail transport agent *
3 *************************************************/
5 /* Copyright (c) University of Cambridge 1995 - 2018 */
6 /* See the file NOTICE for conditions of use and distribution. */
9 /* The main function: entry point, initialization, and high-level control.
10 Also a few functions that don't naturally fit elsewhere. */
15 #if defined(__GLIBC__) && !defined(__UCLIBC__)
16 # include <gnu/libc-version.h>
20 # include <gnutls/gnutls.h>
21 # if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
26 extern void init_lookup_list(void);
30 /*************************************************
31 * Function interface to store functions *
32 *************************************************/
34 /* We need some real functions to pass to the PCRE regular expression library
35 for store allocation via Exim's store manager. The normal calls are actually
36 macros that pass over location information to make tracing easier. These
37 functions just interface to the standard macro calls. A good compiler will
38 optimize out the tail recursion and so not make them too expensive. There
39 are two sets of functions; one for use when we want to retain the compiled
40 regular expression for a long time; the other for short-term use. */
43 function_store_get(size_t size
)
45 /* For now, regard all RE results as potentially tainted. We might need
46 more intelligence on this point. */
47 return store_get((int)size
, TRUE
);
51 function_dummy_free(void *block
) { block
= block
; }
54 function_store_malloc(size_t size
)
56 return store_malloc((int)size
);
60 function_store_free(void *block
)
68 /*************************************************
69 * Enums for cmdline interface *
70 *************************************************/
72 enum commandline_info
{ CMDINFO_NONE
=0,
73 CMDINFO_HELP
, CMDINFO_SIEVE
, CMDINFO_DSCP
};
78 /*************************************************
79 * Compile regular expression and panic on fail *
80 *************************************************/
82 /* This function is called when failure to compile a regular expression leads
83 to a panic exit. In other cases, pcre_compile() is called directly. In many
84 cases where this function is used, the results of the compilation are to be
85 placed in long-lived store, so we temporarily reset the store management
86 functions that PCRE uses if the use_malloc flag is set.
89 pattern the pattern to compile
90 caseless TRUE if caseless matching is required
91 use_malloc TRUE if compile into malloc store
93 Returns: pointer to the compiled pattern
97 regex_must_compile(const uschar
*pattern
, BOOL caseless
, BOOL use_malloc
)
100 int options
= PCRE_COPT
;
105 pcre_malloc
= function_store_malloc
;
106 pcre_free
= function_store_free
;
108 if (caseless
) options
|= PCRE_CASELESS
;
109 yield
= pcre_compile(CCS pattern
, options
, (const char **)&error
, &offset
, NULL
);
110 pcre_malloc
= function_store_get
;
111 pcre_free
= function_dummy_free
;
113 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "regular expression error: "
114 "%s at offset %d while compiling %s", error
, offset
, pattern
);
121 /*************************************************
122 * Execute regular expression and set strings *
123 *************************************************/
125 /* This function runs a regular expression match, and sets up the pointers to
126 the matched substrings.
129 re the compiled expression
130 subject the subject string
131 options additional PCRE options
132 setup if < 0 do full setup
133 if >= 0 setup from setup+1 onwards,
134 excluding the full matched string
136 Returns: TRUE or FALSE
140 regex_match_and_setup(const pcre
*re
, const uschar
*subject
, int options
, int setup
)
142 int ovector
[3*(EXPAND_MAXN
+1)];
143 uschar
* s
= string_copy(subject
); /* de-constifying */
144 int n
= pcre_exec(re
, NULL
, CS s
, Ustrlen(s
), 0,
145 PCRE_EOPT
| options
, ovector
, nelem(ovector
));
147 if (n
== 0) n
= EXPAND_MAXN
+ 1;
150 expand_nmax
= setup
< 0 ? 0 : setup
+ 1;
151 for (int nn
= setup
< 0 ? 0 : 2; nn
< n
*2; nn
+= 2)
153 expand_nstring
[expand_nmax
] = s
+ ovector
[nn
];
154 expand_nlength
[expand_nmax
++] = ovector
[nn
+1] - ovector
[nn
];
164 /*************************************************
165 * Set up processing details *
166 *************************************************/
168 /* Save a text string for dumping when SIGUSR1 is received.
169 Do checks for overruns.
171 Arguments: format and arguments, as for printf()
176 set_process_info(const char *format
, ...)
178 gstring gs
= { .size
= PROCESS_INFO_SIZE
- 2, .ptr
= 0, .s
= process_info
};
183 g
= string_fmt_append(&gs
, "%5d ", (int)getpid());
185 va_start(ap
, format
);
186 if (!string_vformat(g
, 0, format
, ap
))
189 g
= string_cat(&gs
, US
"**** string overflowed buffer ****");
191 g
= string_catn(g
, US
"\n", 1);
192 string_from_gstring(g
);
193 process_info_len
= g
->ptr
;
194 DEBUG(D_process_info
) debug_printf("set_process_info: %s", process_info
);
198 /***********************************************
199 * Handler for SIGTERM *
200 ***********************************************/
203 term_handler(int sig
)
209 /*************************************************
210 * Handler for SIGUSR1 *
211 *************************************************/
213 /* SIGUSR1 causes any exim process to write to the process log details of
214 what it is currently doing. It will only be used if the OS is capable of
215 setting up a handler that causes automatic restarting of any system call
216 that is in progress at the time.
218 This function takes care to be signal-safe.
220 Argument: the signal number (SIGUSR1)
225 usr1_handler(int sig
)
229 os_restarting_signal(sig
, usr1_handler
);
231 if ((fd
= Uopen(process_log_path
, O_APPEND
|O_WRONLY
, LOG_MODE
)) < 0)
233 /* If we are already running as the Exim user, try to create it in the
234 current process (assuming spool_directory exists). Otherwise, if we are
235 root, do the creation in an exim:exim subprocess. */
237 int euid
= geteuid();
238 if (euid
== exim_uid
)
239 fd
= Uopen(process_log_path
, O_CREAT
|O_APPEND
|O_WRONLY
, LOG_MODE
);
240 else if (euid
== root_uid
)
241 fd
= log_create_as_exim(process_log_path
);
244 /* If we are neither exim nor root, or if we failed to create the log file,
245 give up. There is not much useful we can do with errors, since we don't want
246 to disrupt whatever is going on outside the signal handler. */
250 (void)write(fd
, process_info
, process_info_len
);
256 /*************************************************
258 *************************************************/
260 /* This handler is enabled most of the time that Exim is running. The handler
261 doesn't actually get used unless alarm() has been called to set a timer, to
262 place a time limit on a system call of some kind. When the handler is run, it
265 There are some other SIGALRM handlers that are used in special cases when more
266 than just a flag setting is required; for example, when reading a message's
267 input. These are normally set up in the code module that uses them, and the
268 SIGALRM handler is reset to this one afterwards.
270 Argument: the signal value (SIGALRM)
275 sigalrm_handler(int sig
)
277 sig
= sig
; /* Keep picky compilers happy */
279 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
284 /*************************************************
285 * Sleep for a fractional time interval *
286 *************************************************/
288 /* This function is called by millisleep() and exim_wait_tick() to wait for a
289 period of time that may include a fraction of a second. The coding is somewhat
290 tedious. We do not expect setitimer() ever to fail, but if it does, the process
291 will wait for ever, so we panic in this instance. (There was a case of this
292 when a bug in a function that calls milliwait() caused it to pass invalid data.
293 That's when I added the check. :-)
295 We assume it to be not worth sleeping for under 100us; this value will
296 require revisiting as hardware advances. This avoids the issue of
297 a zero-valued timer setting meaning "never fire".
299 Argument: an itimerval structure containing the interval
304 milliwait(struct itimerval
*itval
)
307 sigset_t old_sigmask
;
309 if (itval
->it_value
.tv_usec
< 100 && itval
->it_value
.tv_sec
== 0)
311 (void)sigemptyset(&sigmask
); /* Empty mask */
312 (void)sigaddset(&sigmask
, SIGALRM
); /* Add SIGALRM */
313 (void)sigprocmask(SIG_BLOCK
, &sigmask
, &old_sigmask
); /* Block SIGALRM */
314 if (setitimer(ITIMER_REAL
, itval
, NULL
) < 0) /* Start timer */
315 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
316 "setitimer() failed: %s", strerror(errno
));
317 (void)sigfillset(&sigmask
); /* All signals */
318 (void)sigdelset(&sigmask
, SIGALRM
); /* Remove SIGALRM */
319 (void)sigsuspend(&sigmask
); /* Until SIGALRM */
320 (void)sigprocmask(SIG_SETMASK
, &old_sigmask
, NULL
); /* Restore mask */
326 /*************************************************
327 * Millisecond sleep function *
328 *************************************************/
330 /* The basic sleep() function has a granularity of 1 second, which is too rough
331 in some cases - for example, when using an increasing delay to slow down
334 Argument: number of millseconds
341 struct itimerval itval
;
342 itval
.it_interval
.tv_sec
= 0;
343 itval
.it_interval
.tv_usec
= 0;
344 itval
.it_value
.tv_sec
= msec
/1000;
345 itval
.it_value
.tv_usec
= (msec
% 1000) * 1000;
351 /*************************************************
352 * Compare microsecond times *
353 *************************************************/
360 Returns: -1, 0, or +1
364 exim_tvcmp(struct timeval
*t1
, struct timeval
*t2
)
366 if (t1
->tv_sec
> t2
->tv_sec
) return +1;
367 if (t1
->tv_sec
< t2
->tv_sec
) return -1;
368 if (t1
->tv_usec
> t2
->tv_usec
) return +1;
369 if (t1
->tv_usec
< t2
->tv_usec
) return -1;
376 /*************************************************
377 * Clock tick wait function *
378 *************************************************/
380 /* Exim uses a time + a pid to generate a unique identifier in two places: its
381 message IDs, and in file names for maildir deliveries. Because some OS now
382 re-use pids within the same second, sub-second times are now being used.
383 However, for absolute certainty, we must ensure the clock has ticked before
384 allowing the relevant process to complete. At the time of implementation of
385 this code (February 2003), the speed of processors is such that the clock will
386 invariably have ticked already by the time a process has done its job. This
387 function prepares for the time when things are faster - and it also copes with
388 clocks that go backwards.
391 then_tv A timeval which was used to create uniqueness; its usec field
392 has been rounded down to the value of the resolution.
393 We want to be sure the current time is greater than this.
394 resolution The resolution that was used to divide the microseconds
395 (1 for maildir, larger for message ids)
401 exim_wait_tick(struct timeval
*then_tv
, int resolution
)
403 struct timeval now_tv
;
404 long int now_true_usec
;
406 (void)gettimeofday(&now_tv
, NULL
);
407 now_true_usec
= now_tv
.tv_usec
;
408 now_tv
.tv_usec
= (now_true_usec
/resolution
) * resolution
;
410 while (exim_tvcmp(&now_tv
, then_tv
) <= 0)
412 struct itimerval itval
;
413 itval
.it_interval
.tv_sec
= 0;
414 itval
.it_interval
.tv_usec
= 0;
415 itval
.it_value
.tv_sec
= then_tv
->tv_sec
- now_tv
.tv_sec
;
416 itval
.it_value
.tv_usec
= then_tv
->tv_usec
+ resolution
- now_true_usec
;
418 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
419 negative value for the microseconds is possible only in the case when "now"
420 is more than a second less than "then". That means that itval.it_value.tv_sec
421 is greater than zero. The following correction is therefore safe. */
423 if (itval
.it_value
.tv_usec
< 0)
425 itval
.it_value
.tv_usec
+= 1000000;
426 itval
.it_value
.tv_sec
-= 1;
429 DEBUG(D_transport
|D_receive
)
431 if (!f
.running_in_test_harness
)
433 debug_printf("tick check: " TIME_T_FMT
".%06lu " TIME_T_FMT
".%06lu\n",
434 then_tv
->tv_sec
, (long) then_tv
->tv_usec
,
435 now_tv
.tv_sec
, (long) now_tv
.tv_usec
);
436 debug_printf("waiting " TIME_T_FMT
".%06lu\n",
437 itval
.it_value
.tv_sec
, (long) itval
.it_value
.tv_usec
);
443 /* Be prapared to go around if the kernel does not implement subtick
444 granularity (GNU Hurd) */
446 (void)gettimeofday(&now_tv
, NULL
);
447 now_true_usec
= now_tv
.tv_usec
;
448 now_tv
.tv_usec
= (now_true_usec
/resolution
) * resolution
;
455 /*************************************************
456 * Call fopen() with umask 777 and adjust mode *
457 *************************************************/
459 /* Exim runs with umask(0) so that files created with open() have the mode that
460 is specified in the open() call. However, there are some files, typically in
461 the spool directory, that are created with fopen(). They end up world-writeable
462 if no precautions are taken. Although the spool directory is not accessible to
463 the world, this is an untidiness. So this is a wrapper function for fopen()
464 that sorts out the mode of the created file.
467 filename the file name
468 options the fopen() options
469 mode the required mode
471 Returns: the fopened FILE or NULL
475 modefopen(const uschar
*filename
, const char *options
, mode_t mode
)
477 mode_t saved_umask
= umask(0777);
478 FILE *f
= Ufopen(filename
, options
);
479 (void)umask(saved_umask
);
480 if (f
!= NULL
) (void)fchmod(fileno(f
), mode
);
485 /*************************************************
486 * Ensure stdin, stdout, and stderr exist *
487 *************************************************/
489 /* Some operating systems grumble if an exec() happens without a standard
490 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
491 file will be opened and will use these fd values, and then some other bit of
492 code will assume, for example, that it can write error messages to stderr.
493 This function ensures that fds 0, 1, and 2 are open if they do not already
494 exist, by connecting them to /dev/null.
496 This function is also used to ensure that std{in,out,err} exist at all times,
497 so that if any library that Exim calls tries to use them, it doesn't crash.
508 for (int i
= 0; i
<= 2; i
++)
510 if (fstat(i
, &statbuf
) < 0 && errno
== EBADF
)
512 if (devnull
< 0) devnull
= open("/dev/null", O_RDWR
);
513 if (devnull
< 0) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "%s",
514 string_open_failed(errno
, "/dev/null", NULL
));
515 if (devnull
!= i
) (void)dup2(devnull
, i
);
518 if (devnull
> 2) (void)close(devnull
);
524 /*************************************************
525 * Close unwanted file descriptors for delivery *
526 *************************************************/
528 /* This function is called from a new process that has been forked to deliver
529 an incoming message, either directly, or using exec.
531 We want any smtp input streams to be closed in this new process. However, it
532 has been observed that using fclose() here causes trouble. When reading in -bS
533 input, duplicate copies of messages have been seen. The files will be sharing a
534 file pointer with the parent process, and it seems that fclose() (at least on
535 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
536 least sometimes. Hence we go for closing the underlying file descriptors.
538 If TLS is active, we want to shut down the TLS library, but without molesting
539 the parent's SSL connection.
541 For delivery of a non-SMTP message, we want to close stdin and stdout (and
542 stderr unless debugging) because the calling process might have set them up as
543 pipes and be waiting for them to close before it waits for the submission
544 process to terminate. If they aren't closed, they hold up the calling process
545 until the initial delivery process finishes, which is not what we want.
547 Exception: We do want it for synchronous delivery!
549 And notwithstanding all the above, if D_resolver is set, implying resolver
550 debugging, leave stdout open, because that's where the resolver writes its
553 When we close stderr (which implies we've also closed stdout), we also get rid
554 of any controlling terminal.
566 tls_close(NULL
, TLS_NO_SHUTDOWN
); /* Shut down the TLS library */
568 (void)close(fileno(smtp_in
));
569 (void)close(fileno(smtp_out
));
574 (void)close(0); /* stdin */
575 if ((debug_selector
& D_resolver
) == 0) (void)close(1); /* stdout */
576 if (debug_selector
== 0) /* stderr */
578 if (!f
.synchronous_delivery
)
591 /*************************************************
593 *************************************************/
595 /* This function sets a new uid and gid permanently, optionally calling
596 initgroups() to set auxiliary groups. There are some special cases when running
597 Exim in unprivileged modes. In these situations the effective uid will not be
598 root; if we already have the right effective uid/gid, and don't need to
599 initialize any groups, leave things as they are.
604 igflag TRUE if initgroups() wanted
605 msg text to use in debugging output and failure log
607 Returns: nothing; bombs out on failure
611 exim_setugid(uid_t uid
, gid_t gid
, BOOL igflag
, uschar
*msg
)
613 uid_t euid
= geteuid();
614 gid_t egid
= getegid();
616 if (euid
== root_uid
|| euid
!= uid
|| egid
!= gid
|| igflag
)
618 /* At least one OS returns +1 for initgroups failure, so just check for
623 struct passwd
*pw
= getpwuid(uid
);
625 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "cannot run initgroups(): "
626 "no passwd entry for uid=%ld", (long int)uid
);
628 if (initgroups(pw
->pw_name
, gid
) != 0)
629 log_write(0,LOG_MAIN
|LOG_PANIC_DIE
,"initgroups failed for uid=%ld: %s",
630 (long int)uid
, strerror(errno
));
633 if (setgid(gid
) < 0 || setuid(uid
) < 0)
634 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "unable to set gid=%ld or uid=%ld "
635 "(euid=%ld): %s", (long int)gid
, (long int)uid
, (long int)euid
, msg
);
638 /* Debugging output included uid/gid and all groups */
642 int group_count
, save_errno
;
643 gid_t group_list
[EXIM_GROUPLIST_SIZE
];
644 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg
,
645 (long int)geteuid(), (long int)getegid(), (long int)getpid());
646 group_count
= getgroups(nelem(group_list
), group_list
);
648 debug_printf(" auxiliary group list:");
650 for (int i
= 0; i
< group_count
; i
++) debug_printf(" %d", (int)group_list
[i
]);
651 else if (group_count
< 0)
652 debug_printf(" <error: %s>", strerror(save_errno
));
653 else debug_printf(" <none>");
661 /*************************************************
663 *************************************************/
665 /* Exim exits via this function so that it always clears up any open
671 Returns: does not return
675 exim_exit(int rc
, const uschar
* process
)
680 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d %s%s%sterminating with rc=%d "
681 ">>>>>>>>>>>>>>>>\n", (int)getpid(),
682 process
? "(" : "", process
, process
? ") " : "", rc
);
688 exim_underbar_exit(int rc
)
696 /* Print error string, then die */
698 exim_fail(const char * fmt
, ...)
702 vfprintf(stderr
, fmt
, ap
);
706 /* exim_chown_failure() called from exim_chown()/exim_fchown() on failure
707 of chown()/fchown(). See src/functions.h for more explanation */
709 exim_chown_failure(int fd
, const uschar
*name
, uid_t owner
, gid_t group
)
711 int saved_errno
= errno
; /* from the preceeding chown call */
713 log_write(0, LOG_MAIN
|LOG_PANIC
,
714 __FILE__
":%d: chown(%s, %d:%d) failed (%s)."
715 " Please contact the authors and refer to https://bugs.exim.org/show_bug.cgi?id=2391",
716 __LINE__
, name
?name
:US
"<unknown>", owner
, group
, strerror(errno
));
718 /* I leave this here, commented, in case the "bug"(?) comes up again.
719 It is not an Exim bug, but we can provide a workaround.
725 if (0 == (fd
< 0 ? stat(name
, &buf
) : fstat(fd
, &buf
)))
727 if (buf
.st_uid
== owner
&& buf
.st_gid
== group
) return 0;
728 log_write(0, LOG_MAIN
|LOG_PANIC
, "Wrong ownership on %s", name
);
730 else log_write(0, LOG_MAIN
|LOG_PANIC
, "Stat failed on %s: %s", name
, strerror(errno
));
738 /*************************************************
739 * Extract port from host address *
740 *************************************************/
742 /* Called to extract the port from the values given to -oMa and -oMi.
743 It also checks the syntax of the address, and terminates it before the
744 port data when a port is extracted.
747 address the address, with possible port on the end
749 Returns: the port, or zero if there isn't one
750 bombs out on a syntax error
754 check_port(uschar
*address
)
756 int port
= host_address_extract_port(address
);
757 if (string_is_ip_address(address
, NULL
) == 0)
758 exim_fail("exim abandoned: \"%s\" is not an IP address\n", address
);
764 /*************************************************
765 * Test/verify an address *
766 *************************************************/
768 /* This function is called by the -bv and -bt code. It extracts a working
769 address from a full RFC 822 address. This isn't really necessary per se, but it
770 has the effect of collapsing source routes.
774 flags flag bits for verify_address()
775 exit_value to be set for failures
781 test_address(uschar
*s
, int flags
, int *exit_value
)
783 int start
, end
, domain
;
784 uschar
*parse_error
= NULL
;
785 uschar
*address
= parse_extract_address(s
, &parse_error
, &start
, &end
, &domain
,
789 fprintf(stdout
, "syntax error: %s\n", parse_error
);
794 int rc
= verify_address(deliver_make_addr(address
,TRUE
), stdout
, flags
, -1,
795 -1, -1, NULL
, NULL
, NULL
);
796 if (rc
== FAIL
) *exit_value
= 2;
797 else if (rc
== DEFER
&& *exit_value
== 0) *exit_value
= 1;
803 /*************************************************
804 * Show supported features *
805 *************************************************/
808 show_db_version(FILE * f
)
810 #ifdef DB_VERSION_STRING
813 fprintf(f
, "Library version: BDB: Compile: %s\n", DB_VERSION_STRING
);
814 fprintf(f
, " Runtime: %s\n",
815 db_version(NULL
, NULL
, NULL
));
818 fprintf(f
, "Berkeley DB: %s\n", DB_VERSION_STRING
);
820 #elif defined(BTREEVERSION) && defined(HASHVERSION)
822 fprintf(f
, "Probably Berkeley DB version 1.8x (native mode)\n");
824 fprintf(f
, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
827 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
828 fprintf(f
, "Probably ndbm\n");
829 #elif defined(USE_TDB)
830 fprintf(f
, "Using tdb\n");
833 fprintf(f
, "Probably GDBM (native mode)\n");
835 fprintf(f
, "Probably GDBM (compatibility mode)\n");
841 /* This function is called for -bV/--version and for -d to output the optional
842 features of the current Exim binary.
844 Arguments: a FILE for printing
849 show_whats_supported(FILE * fp
)
851 DEBUG(D_any
) {} else show_db_version(fp
);
853 fprintf(fp
, "Support for:");
854 #ifdef SUPPORT_CRYPTEQ
855 fprintf(fp
, " crypteq");
858 fprintf(fp
, " iconv()");
861 fprintf(fp
, " IPv6");
863 #ifdef HAVE_SETCLASSRESOURCES
864 fprintf(fp
, " use_setclassresources");
870 fprintf(fp
, " Perl");
873 fprintf(fp
, " Expand_dlfunc");
875 #ifdef USE_TCP_WRAPPERS
876 fprintf(fp
, " TCPwrappers");
879 fprintf(fp
, " GnuTLS");
882 fprintf(fp
, " OpenSSL");
884 #ifdef SUPPORT_TRANSLATE_IP_ADDRESS
885 fprintf(fp
, " translate_ip_address");
887 #ifdef SUPPORT_MOVE_FROZEN_MESSAGES
888 fprintf(fp
, " move_frozen_messages");
890 #ifdef WITH_CONTENT_SCAN
891 fprintf(fp
, " Content_Scanning");
894 fprintf(fp
, " DANE");
897 fprintf(fp
, " DKIM");
899 #ifndef DISABLE_DNSSEC
900 fprintf(fp
, " DNSSEC");
902 #ifndef DISABLE_EVENT
903 fprintf(fp
, " Event");
906 fprintf(fp
, " I18N");
909 fprintf(fp
, " OCSP");
911 #ifndef DISABLE_PIPE_CONNECT
912 fprintf(fp
, " PIPE_CONNECT");
915 fprintf(fp
, " PRDR");
918 fprintf(fp
, " PROXY");
921 fprintf(fp
, " SOCKS");
927 fprintf(fp
, " DMARC");
931 if (f
.tcp_fastopen_ok
) fprintf(fp
, " TCP_Fast_Open");
933 #ifdef EXPERIMENTAL_LMDB
934 fprintf(fp
, " Experimental_LMDB");
936 #ifdef EXPERIMENTAL_QUEUEFILE
937 fprintf(fp
, " Experimental_QUEUEFILE");
939 #if defined(EXPERIMENTAL_SRS) || defined(EXPERIMENTAL_SRS_NATIVE)
940 fprintf(fp
, " Experimental_SRS");
942 #ifdef EXPERIMENTAL_ARC
943 fprintf(fp
, " Experimental_ARC");
945 #ifdef EXPERIMENTAL_BRIGHTMAIL
946 fprintf(fp
, " Experimental_Brightmail");
948 #ifdef EXPERIMENTAL_DCC
949 fprintf(fp
, " Experimental_DCC");
951 #ifdef EXPERIMENTAL_DSN_INFO
952 fprintf(fp
, " Experimental_DSN_info");
954 #ifdef EXPERIMENTAL_TLS_RESUME
955 fprintf(fp
, " Experimental_TLS_resume");
959 fprintf(fp
, "Lookups (built-in):");
960 #if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
961 fprintf(fp
, " lsearch wildlsearch nwildlsearch iplsearch");
963 #if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
966 #if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
967 fprintf(fp
, " dbm dbmjz dbmnz");
969 #if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
970 fprintf(fp
, " dnsdb");
972 #if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
973 fprintf(fp
, " dsearch");
975 #if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
976 fprintf(fp
, " ibase");
978 #if defined(LOOKUP_JSON) && LOOKUP_JSON!=2
979 fprintf(fp
, " json");
981 #if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
982 fprintf(fp
, " ldap ldapdn ldapm");
984 #ifdef EXPERIMENTAL_LMDB
985 fprintf(fp
, " lmdb");
987 #if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
988 fprintf(fp
, " mysql");
990 #if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
991 fprintf(fp
, " nis nis0");
993 #if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
994 fprintf(fp
, " nisplus");
996 #if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
997 fprintf(fp
, " oracle");
999 #if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
1000 fprintf(fp
, " passwd");
1002 #if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
1003 fprintf(fp
, " pgsql");
1005 #if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
1006 fprintf(fp
, " redis");
1008 #if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
1009 fprintf(fp
, " sqlite");
1011 #if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
1012 fprintf(fp
, " testdb");
1014 #if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
1015 fprintf(fp
, " whoson");
1019 auth_show_supported(fp
);
1020 route_show_supported(fp
);
1021 transport_show_supported(fp
);
1023 #ifdef WITH_CONTENT_SCAN
1024 malware_show_supported(fp
);
1027 if (fixed_never_users
[0] > 0)
1030 fprintf(fp
, "Fixed never_users: ");
1031 for (i
= 1; i
<= (int)fixed_never_users
[0] - 1; i
++)
1032 fprintf(fp
, "%d:", (unsigned int)fixed_never_users
[i
]);
1033 fprintf(fp
, "%d\n", (unsigned int)fixed_never_users
[i
]);
1036 fprintf(fp
, "Configure owner: %d:%d\n", config_uid
, config_gid
);
1038 fprintf(fp
, "Size of off_t: " SIZE_T_FMT
"\n", sizeof(off_t
));
1040 /* Everything else is details which are only worth reporting when debugging.
1041 Perhaps the tls_version_report should move into this too. */
1044 /* clang defines __GNUC__ (at least, for me) so test for it first */
1045 #if defined(__clang__)
1046 fprintf(fp
, "Compiler: CLang [%s]\n", __clang_version__
);
1047 #elif defined(__GNUC__)
1048 fprintf(fp
, "Compiler: GCC [%s]\n",
1052 "? unknown version ?"
1056 fprintf(fp
, "Compiler: <unknown>\n");
1059 #if defined(__GLIBC__) && !defined(__UCLIBC__)
1060 fprintf(fp
, "Library version: Glibc: Compile: %d.%d\n",
1061 __GLIBC__
, __GLIBC_MINOR__
);
1062 if (__GLIBC_PREREQ(2, 1))
1063 fprintf(fp
, " Runtime: %s\n",
1064 gnu_get_libc_version());
1067 show_db_version(fp
);
1070 tls_version_report(fp
);
1073 utf8_version_report(fp
);
1076 for (auth_info
* authi
= auths_available
; *authi
->driver_name
!= '\0'; ++authi
)
1077 if (authi
->version_report
)
1078 (*authi
->version_report
)(fp
);
1080 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
1081 characters; unless it's an ancient version of PCRE in which case it
1083 #ifndef PCRE_PRERELEASE
1084 # define PCRE_PRERELEASE
1087 #define EXPAND_AND_QUOTE(X) QUOTE(X)
1088 fprintf(fp
, "Library version: PCRE: Compile: %d.%d%s\n"
1090 PCRE_MAJOR
, PCRE_MINOR
,
1091 EXPAND_AND_QUOTE(PCRE_PRERELEASE
) "",
1094 #undef EXPAND_AND_QUOTE
1097 for (int i
= 0; i
< lookup_list_count
; i
++)
1098 if (lookup_list
[i
]->version_report
)
1099 lookup_list
[i
]->version_report(fp
);
1101 #ifdef WHITELIST_D_MACROS
1102 fprintf(fp
, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS
);
1104 fprintf(fp
, "WHITELIST_D_MACROS unset\n");
1106 #ifdef TRUSTED_CONFIG_LIST
1107 fprintf(fp
, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST
);
1109 fprintf(fp
, "TRUSTED_CONFIG_LIST unset\n");
1116 /*************************************************
1117 * Show auxiliary information about Exim *
1118 *************************************************/
1121 show_exim_information(enum commandline_info request
, FILE *stream
)
1126 fprintf(stream
, "Oops, something went wrong.\n");
1130 "The -bI: flag takes a string indicating which information to provide.\n"
1131 "If the string is not recognised, you'll get this help (on stderr).\n"
1133 " exim -bI:help this information\n"
1134 " exim -bI:dscp list of known dscp value keywords\n"
1135 " exim -bI:sieve list of supported sieve extensions\n"
1139 for (const uschar
** pp
= exim_sieve_extension_list
; *pp
; ++pp
)
1140 fprintf(stream
, "%s\n", *pp
);
1143 dscp_list_to_stream(stream
);
1149 /*************************************************
1150 * Quote a local part *
1151 *************************************************/
1153 /* This function is used when a sender address or a From: or Sender: header
1154 line is being created from the caller's login, or from an authenticated_id. It
1155 applies appropriate quoting rules for a local part.
1157 Argument: the local part
1158 Returns: the local part, quoted if necessary
1162 local_part_quote(uschar
*lpart
)
1164 BOOL needs_quote
= FALSE
;
1167 for (uschar
* t
= lpart
; !needs_quote
&& *t
!= 0; t
++)
1169 needs_quote
= !isalnum(*t
) && strchr("!#$%&'*+-/=?^_`{|}~", *t
) == NULL
&&
1170 (*t
!= '.' || t
== lpart
|| t
[1] == 0);
1173 if (!needs_quote
) return lpart
;
1175 g
= string_catn(NULL
, US
"\"", 1);
1179 uschar
*nq
= US
Ustrpbrk(lpart
, "\\\"");
1182 g
= string_cat(g
, lpart
);
1185 g
= string_catn(g
, lpart
, nq
- lpart
);
1186 g
= string_catn(g
, US
"\\", 1);
1187 g
= string_catn(g
, nq
, 1);
1191 g
= string_catn(g
, US
"\"", 1);
1192 return string_from_gstring(g
);
1198 /*************************************************
1199 * Load readline() functions *
1200 *************************************************/
1202 /* This function is called from testing executions that read data from stdin,
1203 but only when running as the calling user. Currently, only -be does this. The
1204 function loads the readline() function library and passes back the functions.
1205 On some systems, it needs the curses library, so load that too, but try without
1206 it if loading fails. All this functionality has to be requested at build time.
1209 fn_readline_ptr pointer to where to put the readline pointer
1210 fn_addhist_ptr pointer to where to put the addhistory function
1212 Returns: the dlopen handle or NULL on failure
1216 set_readline(char * (**fn_readline_ptr
)(const char *),
1217 void (**fn_addhist_ptr
)(const char *))
1220 void *dlhandle_curses
= dlopen("libcurses." DYNLIB_FN_EXT
, RTLD_GLOBAL
|RTLD_LAZY
);
1222 dlhandle
= dlopen("libreadline." DYNLIB_FN_EXT
, RTLD_GLOBAL
|RTLD_NOW
);
1223 if (dlhandle_curses
!= NULL
) dlclose(dlhandle_curses
);
1225 if (dlhandle
!= NULL
)
1227 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1228 * char * readline (const char *prompt);
1229 * void add_history (const char *string);
1231 *fn_readline_ptr
= (char *(*)(const char*))dlsym(dlhandle
, "readline");
1232 *fn_addhist_ptr
= (void(*)(const char*))dlsym(dlhandle
, "add_history");
1236 DEBUG(D_any
) debug_printf("failed to load readline: %s\n", dlerror());
1245 /*************************************************
1246 * Get a line from stdin for testing things *
1247 *************************************************/
1249 /* This function is called when running tests that can take a number of lines
1250 of input (for example, -be and -bt). It handles continuations and trailing
1251 spaces. And prompting and a blank line output on eof. If readline() is in use,
1252 the arguments are non-NULL and provide the relevant functions.
1255 fn_readline readline function or NULL
1256 fn_addhist addhist function or NULL
1258 Returns: pointer to dynamic memory, or NULL at end of file
1262 get_stdinput(char *(*fn_readline
)(const char *), void(*fn_addhist
)(const char *))
1266 if (!fn_readline
) { printf("> "); fflush(stdout
); }
1268 for (int i
= 0;; i
++)
1270 uschar buffer
[1024];
1274 char *readline_line
= NULL
;
1277 if (!(readline_line
= fn_readline((i
> 0)? "":"> "))) break;
1278 if (*readline_line
!= 0 && fn_addhist
) fn_addhist(readline_line
);
1279 p
= US readline_line
;
1284 /* readline() not in use */
1287 if (Ufgets(buffer
, sizeof(buffer
), stdin
) == NULL
) break;
1291 /* Handle the line */
1293 ss
= p
+ (int)Ustrlen(p
);
1294 while (ss
> p
&& isspace(ss
[-1])) ss
--;
1297 while (p
< ss
&& isspace(*p
)) p
++; /* leading space after cont */
1299 g
= string_catn(g
, p
, ss
- p
);
1302 if (fn_readline
) free(readline_line
);
1305 /* g can only be NULL if ss==p */
1306 if (ss
== p
|| g
->s
[g
->ptr
-1] != '\\')
1310 (void) string_from_gstring(g
);
1313 if (!g
) printf("\n");
1314 return string_from_gstring(g
);
1319 /*************************************************
1320 * Output usage information for the program *
1321 *************************************************/
1323 /* This function is called when there are no recipients
1324 or a specific --help argument was added.
1327 progname information on what name we were called by
1329 Returns: DOES NOT RETURN
1333 exim_usage(uschar
*progname
)
1336 /* Handle specific program invocation variants */
1337 if (Ustrcmp(progname
, US
"-mailq") == 0)
1339 "mailq - list the contents of the mail queue\n\n"
1340 "For a list of options, see the Exim documentation.\n");
1342 /* Generic usage - we output this whatever happens */
1344 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1345 "not directly from a shell command line. Options and/or arguments control\n"
1346 "what it does when called. For a list of options, see the Exim documentation.\n");
1351 /*************************************************
1352 * Validate that the macros given are okay *
1353 *************************************************/
1355 /* Typically, Exim will drop privileges if macros are supplied. In some
1356 cases, we want to not do so.
1358 Arguments: opt_D_used - true if the commandline had a "-D" option
1359 Returns: true if trusted, false otherwise
1363 macros_trusted(BOOL opt_D_used
)
1365 #ifdef WHITELIST_D_MACROS
1366 uschar
*whitelisted
, *end
, *p
, **whites
;
1367 int white_count
, i
, n
;
1369 BOOL prev_char_item
, found
;
1374 #ifndef WHITELIST_D_MACROS
1378 /* We only trust -D overrides for some invoking users:
1379 root, the exim run-time user, the optional config owner user.
1380 I don't know why config-owner would be needed, but since they can own the
1381 config files anyway, there's no security risk to letting them override -D. */
1382 if ( ! ((real_uid
== root_uid
)
1383 || (real_uid
== exim_uid
)
1384 #ifdef CONFIGURE_OWNER
1385 || (real_uid
== config_uid
)
1389 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid
);
1393 /* Get a list of macros which are whitelisted */
1394 whitelisted
= string_copy_perm(US WHITELIST_D_MACROS
, FALSE
);
1395 prev_char_item
= FALSE
;
1397 for (p
= whitelisted
; *p
!= '\0'; ++p
)
1399 if (*p
== ':' || isspace(*p
))
1404 prev_char_item
= FALSE
;
1407 if (!prev_char_item
)
1408 prev_char_item
= TRUE
;
1415 whites
= store_malloc(sizeof(uschar
*) * (white_count
+1));
1416 for (p
= whitelisted
, i
= 0; (p
!= end
) && (i
< white_count
); ++p
)
1421 if (i
== white_count
)
1423 while (*p
!= '\0' && p
< end
)
1429 /* The list of commandline macros should be very short.
1430 Accept the N*M complexity. */
1431 for (macro_item
* m
= macros_user
; m
; m
= m
->next
) if (m
->command_line
)
1434 for (uschar
** w
= whites
; *w
; ++w
)
1435 if (Ustrcmp(*w
, m
->name
) == 0)
1442 if (!m
->replacement
)
1444 if ((len
= m
->replen
) == 0)
1446 n
= pcre_exec(regex_whitelisted_macro
, NULL
, CS m
->replacement
, len
,
1447 0, PCRE_EOPT
, NULL
, 0);
1450 if (n
!= PCRE_ERROR_NOMATCH
)
1451 debug_printf("macros_trusted checking %s returned %d\n", m
->name
, n
);
1455 DEBUG(D_any
) debug_printf("macros_trusted overridden to true by whitelisting\n");
1461 /*************************************************
1462 * Expansion testing *
1463 *************************************************/
1465 /* Expand and print one item, doing macro-processing.
1468 item line for expansion
1472 expansion_test_line(uschar
* line
)
1477 Ustrncpy(big_buffer
, line
, big_buffer_size
);
1478 big_buffer
[big_buffer_size
-1] = '\0';
1479 len
= Ustrlen(big_buffer
);
1481 (void) macros_expand(0, &len
, &dummy_macexp
);
1483 if (isupper(big_buffer
[0]))
1485 if (macro_read_assignment(big_buffer
))
1486 printf("Defined macro '%s'\n", mlast
->name
);
1489 if ((line
= expand_string(big_buffer
))) printf("%s\n", CS line
);
1490 else printf("Failed: %s\n", expand_string_message
);
1495 /*************************************************
1496 * Entry point and high-level code *
1497 *************************************************/
1499 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1500 the appropriate action. All the necessary functions are present in the one
1501 binary. I originally thought one should split it up, but it turns out that so
1502 much of the apparatus is needed in each chunk that one might as well just have
1503 it all available all the time, which then makes the coding easier as well.
1506 argc count of entries in argv
1507 argv argument strings, with argv[0] being the program name
1509 Returns: EXIT_SUCCESS if terminated successfully
1510 EXIT_FAILURE otherwise, except when a message has been sent
1511 to the sender, and -oee was given
1515 main(int argc
, char **cargv
)
1517 uschar
**argv
= USS cargv
;
1518 int arg_receive_timeout
= -1;
1519 int arg_smtp_receive_timeout
= -1;
1520 int arg_error_handling
= error_handling
;
1521 int filter_sfd
= -1;
1522 int filter_ufd
= -1;
1525 int list_queue_option
= 0;
1527 int msg_action_arg
= -1;
1528 int namelen
= (argv
[0] == NULL
)? 0 : Ustrlen(argv
[0]);
1529 int queue_only_reason
= 0;
1531 int perl_start_option
= 0;
1533 int recipients_arg
= argc
;
1534 int sender_address_domain
= 0;
1535 int test_retry_arg
= -1;
1536 int test_rewrite_arg
= -1;
1537 gid_t original_egid
;
1538 BOOL arg_queue_only
= FALSE
;
1539 BOOL bi_option
= FALSE
;
1540 BOOL checking
= FALSE
;
1541 BOOL count_queue
= FALSE
;
1542 BOOL expansion_test
= FALSE
;
1543 BOOL extract_recipients
= FALSE
;
1544 BOOL flag_G
= FALSE
;
1545 BOOL flag_n
= FALSE
;
1546 BOOL forced_delivery
= FALSE
;
1547 BOOL f_end_dot
= FALSE
;
1548 BOOL deliver_give_up
= FALSE
;
1549 BOOL list_queue
= FALSE
;
1550 BOOL list_options
= FALSE
;
1551 BOOL list_config
= FALSE
;
1552 BOOL local_queue_only
;
1554 BOOL one_msg_action
= FALSE
;
1555 BOOL opt_D_used
= FALSE
;
1556 BOOL queue_only_set
= FALSE
;
1557 BOOL receiving_message
= TRUE
;
1558 BOOL sender_ident_set
= FALSE
;
1559 BOOL session_local_queue_only
;
1561 BOOL removed_privilege
= FALSE
;
1562 BOOL usage_wanted
= FALSE
;
1563 BOOL verify_address_mode
= FALSE
;
1564 BOOL verify_as_sender
= FALSE
;
1565 BOOL version_printed
= FALSE
;
1566 uschar
*alias_arg
= NULL
;
1567 uschar
*called_as
= US
"";
1568 uschar
*cmdline_syslog_name
= NULL
;
1569 uschar
*start_queue_run_id
= NULL
;
1570 uschar
*stop_queue_run_id
= NULL
;
1571 uschar
*expansion_test_message
= NULL
;
1572 uschar
*ftest_domain
= NULL
;
1573 uschar
*ftest_localpart
= NULL
;
1574 uschar
*ftest_prefix
= NULL
;
1575 uschar
*ftest_suffix
= NULL
;
1576 uschar
*log_oneline
= NULL
;
1577 uschar
*malware_test_file
= NULL
;
1578 uschar
*real_sender_address
;
1579 uschar
*originator_home
= US
"/";
1584 struct stat statbuf
;
1585 pid_t passed_qr_pid
= (pid_t
)0;
1586 int passed_qr_pipe
= -1;
1587 gid_t group_list
[EXIM_GROUPLIST_SIZE
];
1589 /* For the -bI: flag */
1590 enum commandline_info info_flag
= CMDINFO_NONE
;
1591 BOOL info_stdout
= FALSE
;
1593 /* Possible options for -R and -S */
1595 static uschar
*rsopts
[] = { US
"f", US
"ff", US
"r", US
"rf", US
"rff" };
1597 /* Need to define this in case we need to change the environment in order
1598 to get rid of a bogus time zone. We have to make it char rather than uschar
1599 because some OS define it in /usr/include/unistd.h. */
1601 extern char **environ
;
1603 #ifdef MEASURE_TIMING
1604 (void)gettimeofday(×tamp_startup
, NULL
);
1607 /* If the Exim user and/or group and/or the configuration file owner/group were
1608 defined by ref:name at build time, we must now find the actual uid/gid values.
1609 This is a feature to make the lives of binary distributors easier. */
1611 #ifdef EXIM_USERNAME
1612 if (route_finduser(US EXIM_USERNAME
, &pw
, &exim_uid
))
1615 exim_fail("exim: refusing to run with uid 0 for \"%s\"\n", EXIM_USERNAME
);
1617 /* If ref:name uses a number as the name, route_finduser() returns
1618 TRUE with exim_uid set and pw coerced to NULL. */
1620 exim_gid
= pw
->pw_gid
;
1621 #ifndef EXIM_GROUPNAME
1624 "exim: ref:name should specify a usercode, not a group.\n"
1625 "exim: can't let you get away with it unless you also specify a group.\n");
1629 exim_fail("exim: failed to find uid for user name \"%s\"\n", EXIM_USERNAME
);
1632 #ifdef EXIM_GROUPNAME
1633 if (!route_findgroup(US EXIM_GROUPNAME
, &exim_gid
))
1634 exim_fail("exim: failed to find gid for group name \"%s\"\n", EXIM_GROUPNAME
);
1637 #ifdef CONFIGURE_OWNERNAME
1638 if (!route_finduser(US CONFIGURE_OWNERNAME
, NULL
, &config_uid
))
1639 exim_fail("exim: failed to find uid for user name \"%s\"\n",
1640 CONFIGURE_OWNERNAME
);
1643 /* We default the system_filter_user to be the Exim run-time user, as a
1644 sane non-root value. */
1645 system_filter_uid
= exim_uid
;
1647 #ifdef CONFIGURE_GROUPNAME
1648 if (!route_findgroup(US CONFIGURE_GROUPNAME
, &config_gid
))
1649 exim_fail("exim: failed to find gid for group name \"%s\"\n",
1650 CONFIGURE_GROUPNAME
);
1653 /* In the Cygwin environment, some initialization used to need doing.
1654 It was fudged in by means of this macro; now no longer but we'll leave
1655 it in case of others. */
1661 /* Check a field which is patched when we are running Exim within its
1662 testing harness; do a fast initial check, and then the whole thing. */
1664 f
.running_in_test_harness
=
1665 *running_status
== '<' && Ustrcmp(running_status
, "<<<testing>>>") == 0;
1666 if (f
.running_in_test_harness
)
1669 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1670 at the start of a program; however, it seems that some environments do not
1671 follow this. A "strange" locale can affect the formatting of timestamps, so we
1674 setlocale(LC_ALL
, "C");
1676 /* Set up the default handler for timing using alarm(). */
1678 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
1680 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1681 because store_malloc writes a log entry on failure. */
1683 if (!(log_buffer
= US
malloc(LOG_BUFFER_SIZE
)))
1684 exim_fail("exim: failed to get store for log buffer\n");
1686 /* Initialize the default log options. */
1688 bits_set(log_selector
, log_selector_size
, log_default
);
1690 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1691 NULL when the daemon is run and the file is closed. We have to use this
1692 indirection, because some systems don't allow writing to the variable "stderr".
1695 if (fstat(fileno(stderr
), &statbuf
) >= 0) log_stderr
= stderr
;
1697 /* Arrange for the PCRE regex library to use our store functions. Note that
1698 the normal calls are actually macros that add additional arguments for
1699 debugging purposes so we have to assign specially constructed functions here.
1700 The default is to use store in the stacking pool, but this is overridden in the
1701 regex_must_compile() function. */
1703 pcre_malloc
= function_store_get
;
1704 pcre_free
= function_dummy_free
;
1706 /* Ensure there is a big buffer for temporary use in several places. It is put
1707 in malloc store so that it can be freed for enlargement if necessary. */
1709 big_buffer
= store_malloc(big_buffer_size
);
1711 /* Set up the handler for the data request signal, and set the initial
1712 descriptive text. */
1714 process_info
= store_get(PROCESS_INFO_SIZE
, TRUE
); /* tainted */
1715 set_process_info("initializing");
1716 os_restarting_signal(SIGUSR1
, usr1_handler
);
1718 /* If running in a dockerized environment, the TERM signal is only
1719 delegated to the PID 1 if we request it by setting an signal handler */
1720 if (getpid() == 1) signal(SIGTERM
, term_handler
);
1722 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1723 in the daemon code. For the rest of Exim's uses, we ignore it. */
1725 signal(SIGHUP
, SIG_IGN
);
1727 /* We don't want to die on pipe errors as the code is written to handle
1728 the write error instead. */
1730 signal(SIGPIPE
, SIG_IGN
);
1732 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1733 set to SIG_IGN. This causes subprocesses that complete before the parent
1734 process waits for them not to hang around, so when Exim calls wait(), nothing
1735 is there. The wait() code has been made robust against this, but let's ensure
1736 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1737 ending status. We use sigaction rather than plain signal() on those OS where
1738 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1739 problem on AIX with this.) */
1743 struct sigaction act
;
1744 act
.sa_handler
= SIG_DFL
;
1745 sigemptyset(&(act
.sa_mask
));
1747 sigaction(SIGCHLD
, &act
, NULL
);
1750 signal(SIGCHLD
, SIG_DFL
);
1753 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1758 /* Set up the version number. Set up the leading 'E' for the external form of
1759 message ids, set the pointer to the internal form, and initialize it to
1760 indicate no message being processed. */
1763 message_id_option
[0] = '-';
1764 message_id_external
= message_id_option
+ 1;
1765 message_id_external
[0] = 'E';
1766 message_id
= message_id_external
+ 1;
1769 /* Set the umask to zero so that any files Exim creates using open() are
1770 created with the modes that it specifies. NOTE: Files created with fopen() have
1771 a problem, which was not recognized till rather late (February 2006). With this
1772 umask, such files will be world writeable. (They are all content scanning files
1773 in the spool directory, which isn't world-accessible, so this is not a
1774 disaster, but it's untidy.) I don't want to change this overall setting,
1775 however, because it will interact badly with the open() calls. Instead, there's
1776 now a function called modefopen() that fiddles with the umask while calling
1781 /* Precompile the regular expression for matching a message id. Keep this in
1782 step with the code that generates ids in the accept.c module. We need to do
1783 this here, because the -M options check their arguments for syntactic validity
1784 using mac_ismsgid, which uses this. */
1787 regex_must_compile(US
"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE
, TRUE
);
1789 /* Precompile the regular expression that is used for matching an SMTP error
1790 code, possibly extended, at the start of an error message. Note that the
1791 terminating whitespace character is included. */
1794 regex_must_compile(US
"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1797 #ifdef WHITELIST_D_MACROS
1798 /* Precompile the regular expression used to filter the content of macros
1799 given to -D for permissibility. */
1801 regex_whitelisted_macro
=
1802 regex_must_compile(US
"^[A-Za-z0-9_/.-]*$", FALSE
, TRUE
);
1805 for (i
= 0; i
< REGEX_VARS
; i
++) regex_vars
[i
] = NULL
;
1807 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1808 this seems to be a generally accepted convention, since one finds symbolic
1809 links called "mailq" in standard OS configurations. */
1811 if ((namelen
== 5 && Ustrcmp(argv
[0], "mailq") == 0) ||
1812 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/mailq", 6) == 0))
1815 receiving_message
= FALSE
;
1816 called_as
= US
"-mailq";
1819 /* If the program is called as "rmail" treat it as equivalent to
1820 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1821 i.e. preventing a single dot on a line from terminating the message, and
1822 returning with zero return code, even in cases of error (provided an error
1823 message has been sent). */
1825 if ((namelen
== 5 && Ustrcmp(argv
[0], "rmail") == 0) ||
1826 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rmail", 6) == 0))
1829 called_as
= US
"-rmail";
1830 errors_sender_rc
= EXIT_SUCCESS
;
1833 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1834 this is a smail convention. */
1836 if ((namelen
== 5 && Ustrcmp(argv
[0], "rsmtp") == 0) ||
1837 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rsmtp", 6) == 0))
1839 smtp_input
= smtp_batched_input
= TRUE
;
1840 called_as
= US
"-rsmtp";
1843 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1844 this is a smail convention. */
1846 if ((namelen
== 4 && Ustrcmp(argv
[0], "runq") == 0) ||
1847 (namelen
> 4 && Ustrncmp(argv
[0] + namelen
- 5, "/runq", 5) == 0))
1850 receiving_message
= FALSE
;
1851 called_as
= US
"-runq";
1854 /* If the program is called as "newaliases" treat it as equivalent to
1855 "exim -bi"; this is a sendmail convention. */
1857 if ((namelen
== 10 && Ustrcmp(argv
[0], "newaliases") == 0) ||
1858 (namelen
> 10 && Ustrncmp(argv
[0] + namelen
- 11, "/newaliases", 11) == 0))
1861 receiving_message
= FALSE
;
1862 called_as
= US
"-newaliases";
1865 /* Save the original effective uid for a couple of uses later. It should
1866 normally be root, but in some esoteric environments it may not be. */
1868 original_euid
= geteuid();
1869 original_egid
= getegid();
1871 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1872 to be the same as the real ones. This makes a difference only if Exim is setuid
1873 (or setgid) to something other than root, which could be the case in some
1874 special configurations. */
1876 real_uid
= getuid();
1877 real_gid
= getgid();
1879 if (real_uid
== root_uid
)
1881 if ((rv
= setgid(real_gid
)))
1882 exim_fail("exim: setgid(%ld) failed: %s\n",
1883 (long int)real_gid
, strerror(errno
));
1884 if ((rv
= setuid(real_uid
)))
1885 exim_fail("exim: setuid(%ld) failed: %s\n",
1886 (long int)real_uid
, strerror(errno
));
1889 /* If neither the original real uid nor the original euid was root, Exim is
1890 running in an unprivileged state. */
1892 unprivileged
= (real_uid
!= root_uid
&& original_euid
!= root_uid
);
1894 /* Scan the program's arguments. Some can be dealt with right away; others are
1895 simply recorded for checking and handling afterwards. Do a high-level switch
1896 on the second character (the one after '-'), to save some effort. */
1898 for (i
= 1; i
< argc
; i
++)
1900 BOOL badarg
= FALSE
;
1901 uschar
*arg
= argv
[i
];
1905 /* An argument not starting with '-' is the start of a recipients list;
1906 break out of the options-scanning loop. */
1914 /* An option consisting of -- terminates the options */
1916 if (Ustrcmp(arg
, "--") == 0)
1918 recipients_arg
= i
+ 1;
1922 /* Handle flagged options */
1924 switchchar
= arg
[1];
1927 /* Make all -ex options synonymous with -oex arguments, since that
1928 is assumed by various callers. Also make -qR options synonymous with -R
1929 options, as that seems to be required as well. Allow for -qqR too, and
1930 the same for -S options. */
1932 if (Ustrncmp(arg
+1, "oe", 2) == 0 ||
1933 Ustrncmp(arg
+1, "qR", 2) == 0 ||
1934 Ustrncmp(arg
+1, "qS", 2) == 0)
1936 switchchar
= arg
[2];
1939 else if (Ustrncmp(arg
+1, "qqR", 3) == 0 || Ustrncmp(arg
+1, "qqS", 3) == 0)
1941 switchchar
= arg
[3];
1943 f
.queue_2stage
= TRUE
;
1946 /* Make -r synonymous with -f, since it is a documented alias */
1948 else if (arg
[1] == 'r') switchchar
= 'f';
1950 /* Make -ov synonymous with -v */
1952 else if (Ustrcmp(arg
, "-ov") == 0)
1958 /* deal with --option_aliases */
1959 else if (switchchar
== '-')
1961 if (Ustrcmp(argrest
, "help") == 0)
1963 usage_wanted
= TRUE
;
1966 else if (Ustrcmp(argrest
, "version") == 0)
1973 /* High-level switch on active initial letter */
1978 /* sendmail uses -Ac and -Am to control which .cf file is used;
1981 if (*argrest
== '\0') { badarg
= TRUE
; break; }
1984 BOOL ignore
= FALSE
;
1989 if (*(argrest
+ 1) == '\0')
1993 if (!ignore
) { badarg
= TRUE
; break; }
1997 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1998 so has no need of it. */
2001 if (*argrest
== 0) i
++; /* Skip over the type */
2006 receiving_message
= FALSE
; /* Reset TRUE for -bm, -bS, -bs below */
2008 /* -bd: Run in daemon mode, awaiting SMTP connections.
2009 -bdf: Ditto, but in the foreground.
2012 if (*argrest
== 'd')
2014 f
.daemon_listen
= TRUE
;
2015 if (*(++argrest
) == 'f') f
.background_daemon
= FALSE
;
2016 else if (*argrest
!= 0) { badarg
= TRUE
; break; }
2019 /* -be: Run in expansion test mode
2020 -bem: Ditto, but read a message from a file first
2023 else if (*argrest
== 'e')
2025 expansion_test
= checking
= TRUE
;
2026 if (argrest
[1] == 'm')
2028 if (++i
>= argc
) { badarg
= TRUE
; break; }
2029 expansion_test_message
= argv
[i
];
2032 if (argrest
[1] != 0) { badarg
= TRUE
; break; }
2035 /* -bF: Run system filter test */
2037 else if (*argrest
== 'F')
2039 filter_test
|= checking
= FTEST_SYSTEM
;
2040 if (*(++argrest
) != 0) { badarg
= TRUE
; break; }
2041 if (++i
< argc
) filter_test_sfile
= argv
[i
]; else
2042 exim_fail("exim: file name expected after %s\n", argv
[i
-1]);
2045 /* -bf: Run user filter test
2046 -bfd: Set domain for filter testing
2047 -bfl: Set local part for filter testing
2048 -bfp: Set prefix for filter testing
2049 -bfs: Set suffix for filter testing
2052 else if (*argrest
== 'f')
2054 if (*(++argrest
) == 0)
2056 filter_test
|= checking
= FTEST_USER
;
2057 if (++i
< argc
) filter_test_ufile
= argv
[i
]; else
2058 exim_fail("exim: file name expected after %s\n", argv
[i
-1]);
2063 exim_fail("exim: string expected after %s\n", arg
);
2064 if (Ustrcmp(argrest
, "d") == 0) ftest_domain
= argv
[i
];
2065 else if (Ustrcmp(argrest
, "l") == 0) ftest_localpart
= argv
[i
];
2066 else if (Ustrcmp(argrest
, "p") == 0) ftest_prefix
= argv
[i
];
2067 else if (Ustrcmp(argrest
, "s") == 0) ftest_suffix
= argv
[i
];
2068 else { badarg
= TRUE
; break; }
2072 /* -bh: Host checking - an IP address must follow. */
2074 else if (Ustrcmp(argrest
, "h") == 0 || Ustrcmp(argrest
, "hc") == 0)
2076 if (++i
>= argc
) { badarg
= TRUE
; break; }
2077 sender_host_address
= argv
[i
];
2078 host_checking
= checking
= f
.log_testing_mode
= TRUE
;
2079 f
.host_checking_callout
= argrest
[1] == 'c';
2080 message_logs
= FALSE
;
2083 /* -bi: This option is used by sendmail to initialize *the* alias file,
2084 though it has the -oA option to specify a different file. Exim has no
2085 concept of *the* alias file, but since Sun's YP make script calls
2086 sendmail this way, some support must be provided. */
2088 else if (Ustrcmp(argrest
, "i") == 0) bi_option
= TRUE
;
2090 /* -bI: provide information, of the type to follow after a colon.
2091 This is an Exim flag. */
2093 else if (argrest
[0] == 'I' && Ustrlen(argrest
) >= 2 && argrest
[1] == ':')
2095 uschar
*p
= &argrest
[2];
2096 info_flag
= CMDINFO_HELP
;
2099 if (strcmpic(p
, CUS
"sieve") == 0)
2101 info_flag
= CMDINFO_SIEVE
;
2104 else if (strcmpic(p
, CUS
"dscp") == 0)
2106 info_flag
= CMDINFO_DSCP
;
2109 else if (strcmpic(p
, CUS
"help") == 0)
2116 /* -bm: Accept and deliver message - the default option. Reinstate
2117 receiving_message, which got turned off for all -b options. */
2119 else if (Ustrcmp(argrest
, "m") == 0) receiving_message
= TRUE
;
2121 /* -bmalware: test the filename given for malware */
2123 else if (Ustrcmp(argrest
, "malware") == 0)
2125 if (++i
>= argc
) { badarg
= TRUE
; break; }
2127 malware_test_file
= argv
[i
];
2130 /* -bnq: For locally originating messages, do not qualify unqualified
2131 addresses. In the envelope, this causes errors; in header lines they
2134 else if (Ustrcmp(argrest
, "nq") == 0)
2136 f
.allow_unqualified_sender
= FALSE
;
2137 f
.allow_unqualified_recipient
= FALSE
;
2140 /* -bpxx: List the contents of the mail queue, in various forms. If
2141 the option is -bpc, just a queue count is needed. Otherwise, if the
2142 first letter after p is r, then order is random. */
2144 else if (*argrest
== 'p')
2146 if (*(++argrest
) == 'c')
2149 if (*(++argrest
) != 0) badarg
= TRUE
;
2153 if (*argrest
== 'r')
2155 list_queue_option
= 8;
2158 else list_queue_option
= 0;
2162 /* -bp: List the contents of the mail queue, top-level only */
2164 if (*argrest
== 0) {}
2166 /* -bpu: List the contents of the mail queue, top-level undelivered */
2168 else if (Ustrcmp(argrest
, "u") == 0) list_queue_option
+= 1;
2170 /* -bpa: List the contents of the mail queue, including all delivered */
2172 else if (Ustrcmp(argrest
, "a") == 0) list_queue_option
+= 2;
2174 /* Unknown after -bp[r] */
2184 /* -bP: List the configuration variables given as the address list.
2185 Force -v, so configuration errors get displayed. */
2187 else if (Ustrcmp(argrest
, "P") == 0)
2189 /* -bP config: we need to setup here, because later,
2190 * when list_options is checked, the config is read already */
2191 if (argv
[i
+1] && Ustrcmp(argv
[i
+1], "config") == 0)
2194 readconf_save_config(version_string
);
2198 list_options
= TRUE
;
2199 debug_selector
|= D_v
;
2200 debug_file
= stderr
;
2204 /* -brt: Test retry configuration lookup */
2206 else if (Ustrcmp(argrest
, "rt") == 0)
2209 test_retry_arg
= i
+ 1;
2213 /* -brw: Test rewrite configuration */
2215 else if (Ustrcmp(argrest
, "rw") == 0)
2218 test_rewrite_arg
= i
+ 1;
2222 /* -bS: Read SMTP commands on standard input, but produce no replies -
2223 all errors are reported by sending messages. */
2225 else if (Ustrcmp(argrest
, "S") == 0)
2226 smtp_input
= smtp_batched_input
= receiving_message
= TRUE
;
2228 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2229 on standard output. */
2231 else if (Ustrcmp(argrest
, "s") == 0) smtp_input
= receiving_message
= TRUE
;
2233 /* -bt: address testing mode */
2235 else if (Ustrcmp(argrest
, "t") == 0)
2236 f
.address_test_mode
= checking
= f
.log_testing_mode
= TRUE
;
2238 /* -bv: verify addresses */
2240 else if (Ustrcmp(argrest
, "v") == 0)
2241 verify_address_mode
= checking
= f
.log_testing_mode
= TRUE
;
2243 /* -bvs: verify sender addresses */
2245 else if (Ustrcmp(argrest
, "vs") == 0)
2247 verify_address_mode
= checking
= f
.log_testing_mode
= TRUE
;
2248 verify_as_sender
= TRUE
;
2251 /* -bV: Print version string and support details */
2253 else if (Ustrcmp(argrest
, "V") == 0)
2255 printf("Exim version %s #%s built %s\n", version_string
,
2256 version_cnumber
, version_date
);
2257 printf("%s\n", CS version_copyright
);
2258 version_printed
= TRUE
;
2259 show_whats_supported(stdout
);
2260 f
.log_testing_mode
= TRUE
;
2263 /* -bw: inetd wait mode, accept a listening socket as stdin */
2265 else if (*argrest
== 'w')
2267 f
.inetd_wait_mode
= TRUE
;
2268 f
.background_daemon
= FALSE
;
2269 f
.daemon_listen
= TRUE
;
2270 if (*(++argrest
) != '\0')
2271 if ((inetd_wait_timeout
= readconf_readtime(argrest
, 0, FALSE
)) <= 0)
2272 exim_fail("exim: bad time value %s: abandoned\n", argv
[i
]);
2279 /* -C: change configuration file list; ignore if it isn't really
2280 a change! Enforce a prefix check if required. */
2285 if(++i
< argc
) argrest
= argv
[i
]; else
2286 { badarg
= TRUE
; break; }
2288 if (Ustrcmp(config_main_filelist
, argrest
) != 0)
2290 #ifdef ALT_CONFIG_PREFIX
2292 int len
= Ustrlen(ALT_CONFIG_PREFIX
);
2293 const uschar
*list
= argrest
;
2295 while((filename
= string_nextinlist(&list
, &sep
, big_buffer
,
2296 big_buffer_size
)) != NULL
)
2298 if ((Ustrlen(filename
) < len
||
2299 Ustrncmp(filename
, ALT_CONFIG_PREFIX
, len
) != 0 ||
2300 Ustrstr(filename
, "/../") != NULL
) &&
2301 (Ustrcmp(filename
, "/dev/null") != 0 || real_uid
!= root_uid
))
2302 exim_fail("-C Permission denied\n");
2305 if (real_uid
!= root_uid
)
2307 #ifdef TRUSTED_CONFIG_LIST
2309 if (real_uid
!= exim_uid
2310 #ifdef CONFIGURE_OWNER
2311 && real_uid
!= config_uid
2314 f
.trusted_config
= FALSE
;
2317 FILE *trust_list
= Ufopen(TRUSTED_CONFIG_LIST
, "rb");
2320 struct stat statbuf
;
2322 if (fstat(fileno(trust_list
), &statbuf
) != 0 ||
2323 (statbuf
.st_uid
!= root_uid
/* owner not root */
2324 #ifdef CONFIGURE_OWNER
2325 && statbuf
.st_uid
!= config_uid
/* owner not the special one */
2328 (statbuf
.st_gid
!= root_gid
/* group not root */
2329 #ifdef CONFIGURE_GROUP
2330 && statbuf
.st_gid
!= config_gid
/* group not the special one */
2332 && (statbuf
.st_mode
& 020) != 0 /* group writeable */
2334 (statbuf
.st_mode
& 2) != 0) /* world writeable */
2336 f
.trusted_config
= FALSE
;
2341 /* Well, the trust list at least is up to scratch... */
2342 rmark reset_point
= store_mark();
2343 uschar
*trusted_configs
[32];
2347 while (Ufgets(big_buffer
, big_buffer_size
, trust_list
))
2349 uschar
*start
= big_buffer
, *nl
;
2350 while (*start
&& isspace(*start
))
2354 nl
= Ustrchr(start
, '\n');
2357 trusted_configs
[nr_configs
++] = string_copy(start
);
2358 if (nr_configs
== 32)
2366 const uschar
*list
= argrest
;
2368 while (f
.trusted_config
&& (filename
= string_nextinlist(&list
,
2369 &sep
, big_buffer
, big_buffer_size
)) != NULL
)
2371 for (i
=0; i
< nr_configs
; i
++)
2372 if (Ustrcmp(filename
, trusted_configs
[i
]) == 0)
2374 if (i
== nr_configs
)
2376 f
.trusted_config
= FALSE
;
2381 else /* No valid prefixes found in trust_list file. */
2382 f
.trusted_config
= FALSE
;
2383 store_reset(reset_point
);
2386 else /* Could not open trust_list file. */
2387 f
.trusted_config
= FALSE
;
2390 /* Not root; don't trust config */
2391 f
.trusted_config
= FALSE
;
2395 config_main_filelist
= argrest
;
2396 f
.config_changed
= TRUE
;
2401 /* -D: set up a macro definition */
2404 #ifdef DISABLE_D_OPTION
2405 exim_fail("exim: -D is not available in this Exim binary\n");
2411 uschar
*s
= argrest
;
2414 while (isspace(*s
)) s
++;
2416 if (*s
< 'A' || *s
> 'Z')
2417 exim_fail("exim: macro name set by -D must start with "
2418 "an upper case letter\n");
2420 while (isalnum(*s
) || *s
== '_')
2422 if (ptr
< sizeof(name
)-1) name
[ptr
++] = *s
;
2426 if (ptr
== 0) { badarg
= TRUE
; break; }
2427 while (isspace(*s
)) s
++;
2430 if (*s
++ != '=') { badarg
= TRUE
; break; }
2431 while (isspace(*s
)) s
++;
2434 for (m
= macros_user
; m
; m
= m
->next
)
2435 if (Ustrcmp(m
->name
, name
) == 0)
2436 exim_fail("exim: duplicated -D in command line\n");
2438 m
= macro_create(name
, s
, TRUE
);
2440 if (clmacro_count
>= MAX_CLMACROS
)
2441 exim_fail("exim: too many -D options on command line\n");
2442 clmacros
[clmacro_count
++] =
2443 string_sprintf("-D%s=%s", m
->name
, m
->replacement
);
2448 /* -d: Set debug level (see also -v below) or set the drop_cr option.
2449 The latter is now a no-op, retained for compatibility only. If -dd is used,
2450 debugging subprocesses of the daemon is disabled. */
2453 if (Ustrcmp(argrest
, "ropcr") == 0)
2455 /* drop_cr = TRUE; */
2458 /* Use an intermediate variable so that we don't set debugging while
2459 decoding the debugging bits. */
2463 unsigned int selector
= D_default
;
2466 if (*argrest
== 'd')
2468 f
.debug_daemon
= TRUE
;
2472 decode_bits(&selector
, 1, debug_notall
, argrest
,
2473 debug_options
, debug_options_count
, US
"debug", 0);
2474 debug_selector
= selector
;
2479 /* -E: This is a local error message. This option is not intended for
2480 external use at all, but is not restricted to trusted callers because it
2481 does no harm (just suppresses certain error messages) and if Exim is run
2482 not setuid root it won't always be trusted when it generates error
2483 messages using this option. If there is a message id following -E, point
2484 message_reference at it, for logging. */
2487 f
.local_error_message
= TRUE
;
2488 if (mac_ismsgid(argrest
)) message_reference
= argrest
;
2492 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2493 option, so it looks as if historically the -oex options are also callable
2494 without the leading -o. So we have to accept them. Before the switch,
2495 anything starting -oe has been converted to -e. Exim does not support all
2496 of the sendmail error options. */
2499 if (Ustrcmp(argrest
, "e") == 0)
2501 arg_error_handling
= ERRORS_SENDER
;
2502 errors_sender_rc
= EXIT_SUCCESS
;
2504 else if (Ustrcmp(argrest
, "m") == 0) arg_error_handling
= ERRORS_SENDER
;
2505 else if (Ustrcmp(argrest
, "p") == 0) arg_error_handling
= ERRORS_STDERR
;
2506 else if (Ustrcmp(argrest
, "q") == 0) arg_error_handling
= ERRORS_STDERR
;
2507 else if (Ustrcmp(argrest
, "w") == 0) arg_error_handling
= ERRORS_SENDER
;
2512 /* -F: Set sender's full name, used instead of the gecos entry from
2513 the password file. Since users can usually alter their gecos entries,
2514 there's no security involved in using this instead. The data can follow
2515 the -F or be in the next argument. */
2520 if(++i
< argc
) argrest
= argv
[i
]; else
2521 { badarg
= TRUE
; break; }
2523 originator_name
= argrest
;
2524 f
.sender_name_forced
= TRUE
;
2528 /* -f: Set sender's address - this value is only actually used if Exim is
2529 run by a trusted user, or if untrusted_set_sender is set and matches the
2530 address, except that the null address can always be set by any user. The
2531 test for this happens later, when the value given here is ignored when not
2532 permitted. For an untrusted user, the actual sender is still put in Sender:
2533 if it doesn't match the From: header (unless no_local_from_check is set).
2534 The data can follow the -f or be in the next argument. The -r switch is an
2535 obsolete form of -f but since there appear to be programs out there that
2536 use anything that sendmail has ever supported, better accept it - the
2537 synonymizing is done before the switch above.
2539 At this stage, we must allow domain literal addresses, because we don't
2540 know what the setting of allow_domain_literals is yet. Ditto for trailing
2541 dots and strip_trailing_dot. */
2545 int dummy_start
, dummy_end
;
2549 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2550 { badarg
= TRUE
; break; }
2553 *(sender_address
= store_get(1, FALSE
)) = '\0'; /* Ensure writeable memory */
2556 uschar
*temp
= argrest
+ Ustrlen(argrest
) - 1;
2557 while (temp
>= argrest
&& isspace(*temp
)) temp
--;
2558 if (temp
>= argrest
&& *temp
== '.') f_end_dot
= TRUE
;
2559 allow_domain_literals
= TRUE
;
2560 strip_trailing_dot
= TRUE
;
2562 allow_utf8_domains
= TRUE
;
2564 sender_address
= parse_extract_address(argrest
, &errmess
,
2565 &dummy_start
, &dummy_end
, &sender_address_domain
, TRUE
);
2566 sender_address
= string_copy_taint(sender_address
, TRUE
);
2568 message_smtputf8
= string_is_utf8(sender_address
);
2569 allow_utf8_domains
= FALSE
;
2571 allow_domain_literals
= FALSE
;
2572 strip_trailing_dot
= FALSE
;
2573 if (!sender_address
)
2574 exim_fail("exim: bad -f address \"%s\": %s\n", argrest
, errmess
);
2576 f
.sender_address_forced
= TRUE
;
2580 /* -G: sendmail invocation to specify that it's a gateway submission and
2581 sendmail may complain about problems instead of fixing them.
2582 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2583 not at this time complain about problems. */
2589 /* -h: Set the hop count for an incoming message. Exim does not currently
2590 support this; it always computes it by counting the Received: headers.
2591 To put it in will require a change to the spool header file format. */
2596 if(++i
< argc
) argrest
= argv
[i
]; else
2597 { badarg
= TRUE
; break; }
2599 if (!isdigit(*argrest
)) badarg
= TRUE
;
2603 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2604 not to be documented for sendmail but mailx (at least) uses it) */
2607 if (*argrest
== 0) f
.dot_ends
= FALSE
; else badarg
= TRUE
;
2611 /* -L: set the identifier used for syslog; equivalent to setting
2612 syslog_processname in the config file, but needs to be an admin option. */
2615 if (*argrest
== '\0')
2617 if(++i
< argc
) argrest
= argv
[i
]; else
2618 { badarg
= TRUE
; break; }
2620 if ((sz
= Ustrlen(argrest
)) > 32)
2621 exim_fail("exim: the -L syslog name is too long: \"%s\"\n", argrest
);
2623 exim_fail("exim: the -L syslog name is too short\n");
2624 cmdline_syslog_name
= argrest
;
2628 receiving_message
= FALSE
;
2630 /* -MC: continue delivery of another message via an existing open
2631 file descriptor. This option is used for an internal call by the
2632 smtp transport when there is a pending message waiting to go to an
2633 address to which it has got a connection. Five subsequent arguments are
2634 required: transport name, host name, IP address, sequence number, and
2635 message_id. Transports may decline to create new processes if the sequence
2636 number gets too big. The channel is stdin. This (-MC) must be the last
2637 argument. There's a subsequent check that the real-uid is privileged.
2639 If we are running in the test harness. delay for a bit, to let the process
2640 that set this one up complete. This makes for repeatability of the logging,
2643 if (Ustrcmp(argrest
, "C") == 0)
2645 union sockaddr_46 interface_sock
;
2646 EXIM_SOCKLEN_T size
= sizeof(interface_sock
);
2649 exim_fail("exim: too many or too few arguments after -MC\n");
2651 if (msg_action_arg
>= 0)
2652 exim_fail("exim: incompatible arguments\n");
2654 continue_transport
= argv
[++i
];
2655 continue_hostname
= argv
[++i
];
2656 continue_host_address
= argv
[++i
];
2657 continue_sequence
= Uatoi(argv
[++i
]);
2658 msg_action
= MSG_DELIVER
;
2659 msg_action_arg
= ++i
;
2660 forced_delivery
= TRUE
;
2661 queue_run_pid
= passed_qr_pid
;
2662 queue_run_pipe
= passed_qr_pipe
;
2664 if (!mac_ismsgid(argv
[i
]))
2665 exim_fail("exim: malformed message id %s after -MC option\n",
2668 /* Set up $sending_ip_address and $sending_port, unless proxied */
2670 if (!continue_proxy_cipher
)
2671 if (getsockname(fileno(stdin
), (struct sockaddr
*)(&interface_sock
),
2673 sending_ip_address
= host_ntoa(-1, &interface_sock
, NULL
,
2676 exim_fail("exim: getsockname() failed after -MC option: %s\n",
2679 testharness_pause_ms(500);
2683 else if (*argrest
== 'C' && argrest
[1] && !argrest
[2])
2687 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2688 precedes -MC (see above). The flag indicates that the host to which
2689 Exim is connected has accepted an AUTH sequence. */
2691 case 'A': f
.smtp_authenticated
= TRUE
; break;
2693 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2694 that exim is connected to supports the esmtp extension DSN */
2696 case 'D': smtp_peer_options
|= OPTION_DSN
; break;
2698 /* -MCG: set the queue name, to a non-default value */
2700 case 'G': if (++i
< argc
) queue_name
= string_copy(argv
[i
]);
2704 /* -MCK: the peer offered CHUNKING. Must precede -MC */
2706 case 'K': smtp_peer_options
|= OPTION_CHUNKING
; break;
2708 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2709 it preceded -MC (see above) */
2711 case 'P': smtp_peer_options
|= OPTION_PIPE
; break;
2713 /* -MCQ: pass on the pid of the queue-running process that started
2714 this chain of deliveries and the fd of its synchronizing pipe; this
2715 is useful only when it precedes -MC (see above) */
2717 case 'Q': if (++i
< argc
) passed_qr_pid
= (pid_t
)(Uatol(argv
[i
]));
2719 if (++i
< argc
) passed_qr_pipe
= (int)(Uatol(argv
[i
]));
2723 /* -MCS: set the smtp_use_size flag; this is useful only when it
2724 precedes -MC (see above) */
2726 case 'S': smtp_peer_options
|= OPTION_SIZE
; break;
2729 /* -MCt: similar to -MCT below but the connection is still open
2730 via a proxy process which handles the TLS context and coding.
2731 Require three arguments for the proxied local address and port,
2732 and the TLS cipher. */
2734 case 't': if (++i
< argc
) sending_ip_address
= argv
[i
];
2736 if (++i
< argc
) sending_port
= (int)(Uatol(argv
[i
]));
2738 if (++i
< argc
) continue_proxy_cipher
= argv
[i
];
2742 /* -MCT: set the tls_offered flag; this is useful only when it
2743 precedes -MC (see above). The flag indicates that the host to which
2744 Exim is connected has offered TLS support. */
2746 case 'T': smtp_peer_options
|= OPTION_TLS
; break;
2749 default: badarg
= TRUE
; break;
2754 /* -M[x]: various operations on the following list of message ids:
2755 -M deliver the messages, ignoring next retry times and thawing
2756 -Mc deliver the messages, checking next retry times, no thawing
2757 -Mf freeze the messages
2758 -Mg give up on the messages
2759 -Mt thaw the messages
2760 -Mrm remove the messages
2761 In the above cases, this must be the last option. There are also the
2762 following options which are followed by a single message id, and which
2763 act on that message. Some of them use the "recipient" addresses as well.
2764 -Mar add recipient(s)
2765 -Mmad mark all recipients delivered
2766 -Mmd mark recipients(s) delivered
2768 -Mset load a message for use with -be
2770 -Mvc show copy (of whole message, in RFC 2822 format)
2775 else if (*argrest
== 0)
2777 msg_action
= MSG_DELIVER
;
2778 forced_delivery
= f
.deliver_force_thaw
= TRUE
;
2780 else if (Ustrcmp(argrest
, "ar") == 0)
2782 msg_action
= MSG_ADD_RECIPIENT
;
2783 one_msg_action
= TRUE
;
2785 else if (Ustrcmp(argrest
, "c") == 0) msg_action
= MSG_DELIVER
;
2786 else if (Ustrcmp(argrest
, "es") == 0)
2788 msg_action
= MSG_EDIT_SENDER
;
2789 one_msg_action
= TRUE
;
2791 else if (Ustrcmp(argrest
, "f") == 0) msg_action
= MSG_FREEZE
;
2792 else if (Ustrcmp(argrest
, "g") == 0)
2794 msg_action
= MSG_DELIVER
;
2795 deliver_give_up
= TRUE
;
2797 else if (Ustrcmp(argrest
, "G") == 0)
2799 msg_action
= MSG_SETQUEUE
;
2800 queue_name_dest
= argv
[++i
];
2802 else if (Ustrcmp(argrest
, "mad") == 0)
2804 msg_action
= MSG_MARK_ALL_DELIVERED
;
2806 else if (Ustrcmp(argrest
, "md") == 0)
2808 msg_action
= MSG_MARK_DELIVERED
;
2809 one_msg_action
= TRUE
;
2811 else if (Ustrcmp(argrest
, "rm") == 0) msg_action
= MSG_REMOVE
;
2812 else if (Ustrcmp(argrest
, "set") == 0)
2814 msg_action
= MSG_LOAD
;
2815 one_msg_action
= TRUE
;
2817 else if (Ustrcmp(argrest
, "t") == 0) msg_action
= MSG_THAW
;
2818 else if (Ustrcmp(argrest
, "vb") == 0)
2820 msg_action
= MSG_SHOW_BODY
;
2821 one_msg_action
= TRUE
;
2823 else if (Ustrcmp(argrest
, "vc") == 0)
2825 msg_action
= MSG_SHOW_COPY
;
2826 one_msg_action
= TRUE
;
2828 else if (Ustrcmp(argrest
, "vh") == 0)
2830 msg_action
= MSG_SHOW_HEADER
;
2831 one_msg_action
= TRUE
;
2833 else if (Ustrcmp(argrest
, "vl") == 0)
2835 msg_action
= MSG_SHOW_LOG
;
2836 one_msg_action
= TRUE
;
2838 else { badarg
= TRUE
; break; }
2840 /* All the -Mxx options require at least one message id. */
2842 msg_action_arg
= i
+ 1;
2843 if (msg_action_arg
>= argc
)
2844 exim_fail("exim: no message ids given after %s option\n", arg
);
2846 /* Some require only message ids to follow */
2848 if (!one_msg_action
)
2850 for (int j
= msg_action_arg
; j
< argc
; j
++) if (!mac_ismsgid(argv
[j
]))
2851 exim_fail("exim: malformed message id %s after %s option\n",
2853 goto END_ARG
; /* Remaining args are ids */
2856 /* Others require only one message id, possibly followed by addresses,
2857 which will be handled as normal arguments. */
2861 if (!mac_ismsgid(argv
[msg_action_arg
]))
2862 exim_fail("exim: malformed message id %s after %s option\n",
2863 argv
[msg_action_arg
], arg
);
2869 /* Some programs seem to call the -om option without the leading o;
2870 for sendmail it askes for "me too". Exim always does this. */
2873 if (*argrest
!= 0) badarg
= TRUE
;
2877 /* -N: don't do delivery - a debugging option that stops transports doing
2878 their thing. It implies debugging at the D_v level. */
2883 f
.dont_deliver
= TRUE
;
2884 debug_selector
|= D_v
;
2885 debug_file
= stderr
;
2891 /* -n: This means "don't alias" in sendmail, apparently.
2892 For normal invocations, it has no effect.
2893 It may affect some other options. */
2899 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2900 option to the specified value. This form uses long names. We need to handle
2901 -O option=value and -Ooption=value. */
2907 exim_fail("exim: string expected after -O\n");
2913 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2916 if (*argrest
== 'A')
2918 alias_arg
= argrest
+ 1;
2919 if (alias_arg
[0] == 0)
2921 if (i
+1 < argc
) alias_arg
= argv
[++i
]; else
2922 exim_fail("exim: string expected after -oA\n");
2926 /* -oB: Set a connection message max value for remote deliveries */
2928 else if (*argrest
== 'B')
2930 uschar
*p
= argrest
+ 1;
2933 if (i
+1 < argc
&& isdigit((argv
[i
+1][0]))) p
= argv
[++i
]; else
2935 connection_max_messages
= 1;
2943 exim_fail("exim: number expected after -oB\n");
2944 connection_max_messages
= Uatoi(p
);
2948 /* -odb: background delivery */
2950 else if (Ustrcmp(argrest
, "db") == 0)
2952 f
.synchronous_delivery
= FALSE
;
2953 arg_queue_only
= FALSE
;
2954 queue_only_set
= TRUE
;
2957 /* -odf: foreground delivery (smail-compatible option); same effect as
2958 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2961 else if (Ustrcmp(argrest
, "df") == 0 || Ustrcmp(argrest
, "di") == 0)
2963 f
.synchronous_delivery
= TRUE
;
2964 arg_queue_only
= FALSE
;
2965 queue_only_set
= TRUE
;
2968 /* -odq: queue only */
2970 else if (Ustrcmp(argrest
, "dq") == 0)
2972 f
.synchronous_delivery
= FALSE
;
2973 arg_queue_only
= TRUE
;
2974 queue_only_set
= TRUE
;
2977 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2978 but no remote delivery */
2980 else if (Ustrcmp(argrest
, "dqs") == 0)
2982 f
.queue_smtp
= TRUE
;
2983 arg_queue_only
= FALSE
;
2984 queue_only_set
= TRUE
;
2987 /* -oex: Sendmail error flags. As these are also accepted without the
2988 leading -o prefix, for compatibility with vacation and other callers,
2989 they are handled with -e above. */
2991 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2992 -oitrue: Another sendmail syntax for the same */
2994 else if (Ustrcmp(argrest
, "i") == 0 ||
2995 Ustrcmp(argrest
, "itrue") == 0)
2998 /* -oM*: Set various characteristics for an incoming message; actually
2999 acted on for trusted callers only. */
3001 else if (*argrest
== 'M')
3004 exim_fail("exim: data expected after -o%s\n", argrest
);
3006 /* -oMa: Set sender host address */
3008 if (Ustrcmp(argrest
, "Ma") == 0) sender_host_address
= argv
[++i
];
3010 /* -oMaa: Set authenticator name */
3012 else if (Ustrcmp(argrest
, "Maa") == 0)
3013 sender_host_authenticated
= argv
[++i
];
3015 /* -oMas: setting authenticated sender */
3017 else if (Ustrcmp(argrest
, "Mas") == 0)
3018 authenticated_sender
= string_copy_taint(argv
[++i
], TRUE
);
3020 /* -oMai: setting authenticated id */
3022 else if (Ustrcmp(argrest
, "Mai") == 0)
3023 authenticated_id
= string_copy_taint(argv
[++i
], TRUE
);
3025 /* -oMi: Set incoming interface address */
3027 else if (Ustrcmp(argrest
, "Mi") == 0) interface_address
= argv
[++i
];
3029 /* -oMm: Message reference */
3031 else if (Ustrcmp(argrest
, "Mm") == 0)
3033 if (!mac_ismsgid(argv
[i
+1]))
3034 exim_fail("-oMm must be a valid message ID\n");
3035 if (!f
.trusted_config
)
3036 exim_fail("-oMm must be called by a trusted user/config\n");
3037 message_reference
= argv
[++i
];
3040 /* -oMr: Received protocol */
3042 else if (Ustrcmp(argrest
, "Mr") == 0)
3044 if (received_protocol
)
3045 exim_fail("received_protocol is set already\n");
3047 received_protocol
= argv
[++i
];
3049 /* -oMs: Set sender host name */
3051 else if (Ustrcmp(argrest
, "Ms") == 0)
3052 sender_host_name
= string_copy_taint(argv
[++i
], TRUE
);
3054 /* -oMt: Set sender ident */
3056 else if (Ustrcmp(argrest
, "Mt") == 0)
3058 sender_ident_set
= TRUE
;
3059 sender_ident
= argv
[++i
];
3062 /* Else a bad argument */
3071 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3072 seem to call this as -m (undocumented), so that is also accepted (see
3075 else if (Ustrcmp(argrest
, "m") == 0) {}
3077 /* -oo: An ancient flag for old-style addresses which still seems to
3078 crop up in some calls (see in SCO). */
3080 else if (Ustrcmp(argrest
, "o") == 0) {}
3082 /* -oP <name>: set pid file path for daemon
3083 -oPX: delete pid file of daemon */
3085 else if (Ustrcmp(argrest
, "P") == 0)
3086 override_pid_file_path
= argv
[++i
];
3088 else if (Ustrcmp(argrest
, "PX") == 0)
3091 /* -or <n>: set timeout for non-SMTP acceptance
3092 -os <n>: set timeout for SMTP acceptance */
3094 else if (*argrest
== 'r' || *argrest
== 's')
3096 int *tp
= (*argrest
== 'r')?
3097 &arg_receive_timeout
: &arg_smtp_receive_timeout
;
3098 if (argrest
[1] == 0)
3100 if (i
+1 < argc
) *tp
= readconf_readtime(argv
[++i
], 0, FALSE
);
3102 else *tp
= readconf_readtime(argrest
+ 1, 0, FALSE
);
3104 exim_fail("exim: bad time value %s: abandoned\n", argv
[i
]);
3107 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3109 else if (Ustrcmp(argrest
, "X") == 0)
3110 override_local_interfaces
= argv
[++i
];
3112 /* Unknown -o argument */
3118 /* -ps: force Perl startup; -pd force delayed Perl startup */
3122 if (*argrest
== 's' && argrest
[1] == 0)
3124 perl_start_option
= 1;
3127 if (*argrest
== 'd' && argrest
[1] == 0)
3129 perl_start_option
= -1;
3134 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3135 which sets the host protocol and host name */
3139 argrest
= argv
[++i
];
3141 { badarg
= TRUE
; break; }
3147 if (received_protocol
)
3148 exim_fail("received_protocol is set already\n");
3150 hn
= Ustrchr(argrest
, ':');
3152 received_protocol
= argrest
;
3155 int old_pool
= store_pool
;
3156 store_pool
= POOL_PERM
;
3157 received_protocol
= string_copyn(argrest
, hn
- argrest
);
3158 store_pool
= old_pool
;
3159 sender_host_name
= hn
+ 1;
3166 receiving_message
= FALSE
;
3167 if (queue_interval
>= 0)
3168 exim_fail("exim: -q specified more than once\n");
3170 /* -qq...: Do queue runs in a 2-stage manner */
3172 if (*argrest
== 'q')
3174 f
.queue_2stage
= TRUE
;
3178 /* -qi...: Do only first (initial) deliveries */
3180 if (*argrest
== 'i')
3182 f
.queue_run_first_delivery
= TRUE
;
3186 /* -qf...: Run the queue, forcing deliveries
3187 -qff..: Ditto, forcing thawing as well */
3189 if (*argrest
== 'f')
3191 f
.queue_run_force
= TRUE
;
3192 if (*++argrest
== 'f')
3194 f
.deliver_force_thaw
= TRUE
;
3199 /* -q[f][f]l...: Run the queue only on local deliveries */
3201 if (*argrest
== 'l')
3203 f
.queue_run_local
= TRUE
;
3207 /* -q[f][f][l][G<name>]... Work on the named queue */
3209 if (*argrest
== 'G')
3212 for (argrest
++, i
= 0; argrest
[i
] && argrest
[i
] != '/'; ) i
++;
3213 queue_name
= string_copyn(argrest
, i
);
3215 if (*argrest
== '/') argrest
++;
3218 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3219 only, optionally named, optionally starting from a given message id. */
3221 if (!(list_queue
|| count_queue
))
3223 && (i
+ 1 >= argc
|| argv
[i
+1][0] == '-' || mac_ismsgid(argv
[i
+1])))
3226 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
3227 start_queue_run_id
= argv
[++i
];
3228 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
3229 stop_queue_run_id
= argv
[++i
];
3232 /* -q[f][f][l][G<name>/]<n>: Run the queue at regular intervals, optionally
3233 forced, optionally local only, optionally named. */
3235 else if ((queue_interval
= readconf_readtime(*argrest
? argrest
: argv
[++i
],
3237 exim_fail("exim: bad time value %s: abandoned\n", argv
[i
]);
3241 case 'R': /* Synonymous with -qR... */
3242 receiving_message
= FALSE
;
3244 /* -Rf: As -R (below) but force all deliveries,
3245 -Rff: Ditto, but also thaw all frozen messages,
3246 -Rr: String is regex
3247 -Rrf: Regex and force
3248 -Rrff: Regex and force and thaw
3250 in all cases provided there are no further characters in this
3254 for (int i
= 0; i
< nelem(rsopts
); i
++)
3255 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
3257 if (i
!= 2) f
.queue_run_force
= TRUE
;
3258 if (i
>= 2) f
.deliver_selectstring_regex
= TRUE
;
3259 if (i
== 1 || i
== 4) f
.deliver_force_thaw
= TRUE
;
3260 argrest
+= Ustrlen(rsopts
[i
]);
3263 /* -R: Set string to match in addresses for forced queue run to
3264 pick out particular messages. */
3267 deliver_selectstring
= argrest
;
3268 else if (i
+1 < argc
)
3269 deliver_selectstring
= argv
[++i
];
3271 exim_fail("exim: string expected after -R\n");
3275 /* -r: an obsolete synonym for -f (see above) */
3278 /* -S: Like -R but works on sender. */
3280 case 'S': /* Synonymous with -qS... */
3281 receiving_message
= FALSE
;
3283 /* -Sf: As -S (below) but force all deliveries,
3284 -Sff: Ditto, but also thaw all frozen messages,
3285 -Sr: String is regex
3286 -Srf: Regex and force
3287 -Srff: Regex and force and thaw
3289 in all cases provided there are no further characters in this
3293 for (int i
= 0; i
< nelem(rsopts
); i
++)
3294 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
3296 if (i
!= 2) f
.queue_run_force
= TRUE
;
3297 if (i
>= 2) f
.deliver_selectstring_sender_regex
= TRUE
;
3298 if (i
== 1 || i
== 4) f
.deliver_force_thaw
= TRUE
;
3299 argrest
+= Ustrlen(rsopts
[i
]);
3302 /* -S: Set string to match in addresses for forced queue run to
3303 pick out particular messages. */
3306 deliver_selectstring_sender
= argrest
;
3307 else if (i
+1 < argc
)
3308 deliver_selectstring_sender
= argv
[++i
];
3310 exim_fail("exim: string expected after -S\n");
3313 /* -Tqt is an option that is exclusively for use by the testing suite.
3314 It is not recognized in other circumstances. It allows for the setting up
3315 of explicit "queue times" so that various warning/retry things can be
3316 tested. Otherwise variability of clock ticks etc. cause problems. */
3319 if (f
.running_in_test_harness
&& Ustrcmp(argrest
, "qt") == 0)
3320 fudged_queue_times
= argv
[++i
];
3325 /* -t: Set flag to extract recipients from body of message. */
3328 if (*argrest
== 0) extract_recipients
= TRUE
;
3330 /* -ti: Set flag to extract recipients from body of message, and also
3331 specify that dot does not end the message. */
3333 else if (Ustrcmp(argrest
, "i") == 0)
3335 extract_recipients
= TRUE
;
3339 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3342 else if (Ustrcmp(argrest
, "ls-on-connect") == 0) tls_in
.on_connect
= TRUE
;
3349 /* -U: This means "initial user submission" in sendmail, apparently. The
3350 doc claims that in future sendmail may refuse syntactically invalid
3351 messages instead of fixing them. For the moment, we just ignore it. */
3357 /* -v: verify things - this is a very low-level debugging */
3362 debug_selector
|= D_v
;
3363 debug_file
= stderr
;
3369 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3371 The -x flag tells the sendmail command that mail from a local
3372 mail program has National Language Support (NLS) extended characters
3373 in the body of the mail item. The sendmail command can send mail with
3374 extended NLS characters across networks that normally corrupts these
3377 As Exim is 8-bit clean, it just ignores this flag. */
3380 if (*argrest
!= 0) badarg
= TRUE
;
3383 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3384 logs to that file. We swallow the parameter and otherwise ignore it. */
3387 if (*argrest
== '\0')
3389 exim_fail("exim: string expected after -X\n");
3393 if (*argrest
== '\0')
3395 log_oneline
= argv
[i
];
3397 exim_fail("exim: file name expected after %s\n", argv
[i
-1]);
3400 /* All other initial characters are errors */
3405 } /* End of high-level switch statement */
3407 /* Failed to recognize the option, or syntax error */
3410 exim_fail("exim abandoned: unknown, malformed, or incomplete "
3411 "option %s\n", arg
);
3415 /* If -R or -S have been specified without -q, assume a single queue run. */
3417 if ( (deliver_selectstring
|| deliver_selectstring_sender
)
3418 && queue_interval
< 0)
3423 /* If usage_wanted is set we call the usage function - which never returns */
3424 if (usage_wanted
) exim_usage(called_as
);
3426 /* Arguments have been processed. Check for incompatibilities. */
3428 (smtp_input
|| extract_recipients
|| recipients_arg
< argc
) &&
3429 (f
.daemon_listen
|| queue_interval
>= 0 || bi_option
||
3430 test_retry_arg
>= 0 || test_rewrite_arg
>= 0 ||
3431 filter_test
!= FTEST_NONE
|| (msg_action_arg
> 0 && !one_msg_action
))
3434 msg_action_arg
> 0 &&
3435 (f
.daemon_listen
|| queue_interval
> 0 || list_options
||
3436 (checking
&& msg_action
!= MSG_LOAD
) ||
3437 bi_option
|| test_retry_arg
>= 0 || test_rewrite_arg
>= 0)
3440 (f
.daemon_listen
|| queue_interval
> 0) &&
3441 (sender_address
!= NULL
|| list_options
|| list_queue
|| checking
||
3445 f
.daemon_listen
&& queue_interval
== 0
3448 f
.inetd_wait_mode
&& queue_interval
>= 0
3452 (checking
|| smtp_input
|| extract_recipients
||
3453 filter_test
!= FTEST_NONE
|| bi_option
)
3456 verify_address_mode
&&
3457 (f
.address_test_mode
|| smtp_input
|| extract_recipients
||
3458 filter_test
!= FTEST_NONE
|| bi_option
)
3461 f
.address_test_mode
&& (smtp_input
|| extract_recipients
||
3462 filter_test
!= FTEST_NONE
|| bi_option
)
3465 smtp_input
&& (sender_address
!= NULL
|| filter_test
!= FTEST_NONE
||
3469 deliver_selectstring
!= NULL
&& queue_interval
< 0
3472 msg_action
== MSG_LOAD
&&
3473 (!expansion_test
|| expansion_test_message
!= NULL
)
3476 exim_fail("exim: incompatible command-line options or arguments\n");
3478 /* If debugging is set up, set the file and the file descriptor to pass on to
3479 child processes. It should, of course, be 2 for stderr. Also, force the daemon
3480 to run in the foreground. */
3482 if (debug_selector
!= 0)
3484 debug_file
= stderr
;
3485 debug_fd
= fileno(debug_file
);
3486 f
.background_daemon
= FALSE
;
3487 testharness_pause_ms(100); /* lets caller finish */
3488 if (debug_selector
!= D_v
) /* -v only doesn't show this */
3490 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3491 version_string
, (long int)real_uid
, (long int)real_gid
, (int)getpid(),
3493 if (!version_printed
)
3494 show_whats_supported(stderr
);
3498 /* When started with root privilege, ensure that the limits on the number of
3499 open files and the number of processes (where that is accessible) are
3500 sufficiently large, or are unset, in case Exim has been called from an
3501 environment where the limits are screwed down. Not all OS have the ability to
3502 change some of these limits. */
3506 DEBUG(D_any
) debug_print_ids(US
"Exim has no root privilege:");
3512 #ifdef RLIMIT_NOFILE
3513 if (getrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3515 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NOFILE) failed: %s",
3517 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3520 /* I originally chose 1000 as a nice big number that was unlikely to
3521 be exceeded. It turns out that some older OS have a fixed upper limit of
3524 if (rlp
.rlim_cur
< 1000)
3526 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3527 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3529 rlp
.rlim_cur
= rlp
.rlim_max
= 256;
3530 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
3531 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NOFILE) failed: %s",
3538 if (getrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3540 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NPROC) failed: %s",
3542 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
3545 #ifdef RLIM_INFINITY
3546 if (rlp
.rlim_cur
!= RLIM_INFINITY
&& rlp
.rlim_cur
< 1000)
3548 rlp
.rlim_cur
= rlp
.rlim_max
= RLIM_INFINITY
;
3550 if (rlp
.rlim_cur
< 1000)
3552 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
3554 if (setrlimit(RLIMIT_NPROC
, &rlp
) < 0)
3555 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NPROC) failed: %s",
3561 /* Exim is normally entered as root (but some special configurations are
3562 possible that don't do this). However, it always spins off sub-processes that
3563 set their uid and gid as required for local delivery. We don't want to pass on
3564 any extra groups that root may belong to, so we want to get rid of them all at
3567 We need to obey setgroups() at this stage, before possibly giving up root
3568 privilege for a changed configuration file, but later on we might need to
3569 check on the additional groups for the admin user privilege - can't do that
3570 till after reading the config, which might specify the exim gid. Therefore,
3571 save the group list here first. */
3573 if ((group_count
= getgroups(nelem(group_list
), group_list
)) < 0)
3574 exim_fail("exim: getgroups() failed: %s\n", strerror(errno
));
3576 /* There is a fundamental difference in some BSD systems in the matter of
3577 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3578 known not to be different. On the "different" systems there is a single group
3579 list, and the first entry in it is the current group. On all other versions of
3580 Unix there is a supplementary group list, which is in *addition* to the current
3581 group. Consequently, to get rid of all extraneous groups on a "standard" system
3582 you pass over 0 groups to setgroups(), while on a "different" system you pass
3583 over a single group - the current group, which is always the first group in the
3584 list. Calling setgroups() with zero groups on a "different" system results in
3585 an error return. The following code should cope with both types of system.
3587 Unfortunately, recent MacOS, which should be a FreeBSD, "helpfully" succeeds
3588 the "setgroups() with zero groups" - and changes the egid.
3589 Thanks to that we had to stash the original_egid above, for use below
3590 in the call to exim_setugid().
3592 However, if this process isn't running as root, setgroups() can't be used
3593 since you have to be root to run it, even if throwing away groups. Not being
3594 root here happens only in some unusual configurations. We just ignore the
3597 if (setgroups(0, NULL
) != 0 && setgroups(1, group_list
) != 0 && !unprivileged
)
3598 exim_fail("exim: setgroups() failed: %s\n", strerror(errno
));
3600 /* If the configuration file name has been altered by an argument on the
3601 command line (either a new file name or a macro definition) and the caller is
3602 not root, or if this is a filter testing run, remove any setuid privilege the
3603 program has and run as the underlying user.
3605 The exim user is locked out of this, which severely restricts the use of -C
3608 Otherwise, set the real ids to the effective values (should be root unless run
3609 from inetd, which it can either be root or the exim uid, if one is configured).
3611 There is a private mechanism for bypassing some of this, in order to make it
3612 possible to test lots of configurations automatically, without having either to
3613 recompile each time, or to patch in an actual configuration file name and other
3614 values (such as the path name). If running in the test harness, pretend that
3615 configuration file changes and macro definitions haven't happened. */
3618 (!f
.trusted_config
|| /* Config changed, or */
3619 !macros_trusted(opt_D_used
)) && /* impermissible macros and */
3620 real_uid
!= root_uid
&& /* Not root, and */
3621 !f
.running_in_test_harness
/* Not fudged */
3623 expansion_test
/* expansion testing */
3625 filter_test
!= FTEST_NONE
) /* Filter testing */
3627 setgroups(group_count
, group_list
);
3628 exim_setugid(real_uid
, real_gid
, FALSE
,
3629 US
"-C, -D, -be or -bf forces real uid");
3630 removed_privilege
= TRUE
;
3632 /* In the normal case when Exim is called like this, stderr is available
3633 and should be used for any logging information because attempts to write
3634 to the log will usually fail. To arrange this, we unset really_exim. However,
3635 if no stderr is available there is no point - we might as well have a go
3636 at the log (if it fails, syslog will be written).
3638 Note that if the invoker is Exim, the logs remain available. Messing with
3639 this causes unlogged successful deliveries. */
3641 if (log_stderr
&& real_uid
!= exim_uid
)
3642 f
.really_exim
= FALSE
;
3645 /* Privilege is to be retained for the moment. It may be dropped later,
3646 depending on the job that this Exim process has been asked to do. For now, set
3647 the real uid to the effective so that subsequent re-execs of Exim are done by a
3651 exim_setugid(geteuid(), original_egid
, FALSE
, US
"forcing real = effective");
3653 /* If testing a filter, open the file(s) now, before wasting time doing other
3654 setups and reading the message. */
3656 if (filter_test
& FTEST_SYSTEM
)
3657 if ((filter_sfd
= Uopen(filter_test_sfile
, O_RDONLY
, 0)) < 0)
3658 exim_fail("exim: failed to open %s: %s\n", filter_test_sfile
,
3661 if (filter_test
& FTEST_USER
)
3662 if ((filter_ufd
= Uopen(filter_test_ufile
, O_RDONLY
, 0)) < 0)
3663 exim_fail("exim: failed to open %s: %s\n", filter_test_ufile
,
3666 /* Initialise lookup_list
3667 If debugging, already called above via version reporting.
3668 In either case, we initialise the list of available lookups while running
3669 as root. All dynamically modules are loaded from a directory which is
3670 hard-coded into the binary and is code which, if not a module, would be
3671 part of Exim already. Ability to modify the content of the directory
3672 is equivalent to the ability to modify a setuid binary!
3674 This needs to happen before we read the main configuration. */
3678 if (f
.running_in_test_harness
) smtputf8_advertise_hosts
= NULL
;
3681 /* Read the main runtime configuration data; this gives up if there
3682 is a failure. It leaves the configuration file open so that the subsequent
3683 configuration data for delivery can be read if needed.
3685 NOTE: immediately after opening the configuration file we change the working
3686 directory to "/"! Later we change to $spool_directory. We do it there, because
3687 during readconf_main() some expansion takes place already. */
3689 /* Store the initial cwd before we change directories. Can be NULL if the
3690 dir has already been unlinked. */
3691 initial_cwd
= os_getcwd(NULL
, 0);
3694 -be[m] expansion test -
3695 -b[fF] filter test new
3697 -bmalware malware_test_file new
3699 -brw rewrite test new
3701 -bv[s] address verify -
3703 -bP <option> (except -bP config, which sets list_config)
3705 If any of these options is set, we suppress warnings about configuration
3706 issues (currently about tls_advertise_hosts and keep_environment not being
3710 #ifdef MEASURE_TIMING
3711 struct timeval t0
, diff
;
3712 (void)gettimeofday(&t0
, NULL
);
3715 readconf_main(checking
|| list_options
);
3717 #ifdef MEASURE_TIMING
3718 report_time_since(&t0
, US
"readconf_main (delta)");
3723 /* Now in directory "/" */
3725 if (cleanup_environment() == FALSE
)
3726 log_write(0, LOG_PANIC_DIE
, "Can't cleanup environment");
3729 /* If an action on specific messages is requested, or if a daemon or queue
3730 runner is being started, we need to know if Exim was called by an admin user.
3731 This is the case if the real user is root or exim, or if the real group is
3732 exim, or if one of the supplementary groups is exim or a group listed in
3733 admin_groups. We don't fail all message actions immediately if not admin_user,
3734 since some actions can be performed by non-admin users. Instead, set admin_user
3735 for later interrogation. */
3737 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| real_gid
== exim_gid
)
3738 f
.admin_user
= TRUE
;
3740 for (int i
= 0; i
< group_count
&& !f
.admin_user
; i
++)
3741 if (group_list
[i
] == exim_gid
)
3742 f
.admin_user
= TRUE
;
3743 else if (admin_groups
)
3744 for (int j
= 1; j
<= (int)admin_groups
[0] && !f
.admin_user
; j
++)
3745 if (admin_groups
[j
] == group_list
[i
])
3746 f
.admin_user
= TRUE
;
3748 /* Another group of privileged users are the trusted users. These are root,
3749 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3750 are permitted to specify sender_addresses with -f on the command line, and
3751 other message parameters as well. */
3753 if (real_uid
== root_uid
|| real_uid
== exim_uid
)
3754 f
.trusted_caller
= TRUE
;
3758 for (int i
= 1; i
<= (int)trusted_users
[0] && !f
.trusted_caller
; i
++)
3759 if (trusted_users
[i
] == real_uid
)
3760 f
.trusted_caller
= TRUE
;
3763 for (int i
= 1; i
<= (int)trusted_groups
[0] && !f
.trusted_caller
; i
++)
3764 if (trusted_groups
[i
] == real_gid
)
3765 f
.trusted_caller
= TRUE
;
3766 else for (int j
= 0; j
< group_count
&& !f
.trusted_caller
; j
++)
3767 if (trusted_groups
[i
] == group_list
[j
])
3768 f
.trusted_caller
= TRUE
;
3771 /* At this point, we know if the user is privileged and some command-line
3772 options become possibly impermissible, depending upon the configuration file. */
3774 if (checking
&& commandline_checks_require_admin
&& !f
.admin_user
)
3775 exim_fail("exim: those command-line flags are set to require admin\n");
3777 /* Handle the decoding of logging options. */
3779 decode_bits(log_selector
, log_selector_size
, log_notall
,
3780 log_selector_string
, log_options
, log_options_count
, US
"log", 0);
3784 debug_printf("configuration file is %s\n", config_main_filename
);
3785 debug_printf("log selectors =");
3786 for (int i
= 0; i
< log_selector_size
; i
++)
3787 debug_printf(" %08x", log_selector
[i
]);
3791 /* If domain literals are not allowed, check the sender address that was
3792 supplied with -f. Ditto for a stripped trailing dot. */
3796 if (sender_address
[sender_address_domain
] == '[' && !allow_domain_literals
)
3797 exim_fail("exim: bad -f address \"%s\": domain literals not "
3798 "allowed\n", sender_address
);
3799 if (f_end_dot
&& !strip_trailing_dot
)
3800 exim_fail("exim: bad -f address \"%s.\": domain is malformed "
3801 "(trailing dot not allowed)\n", sender_address
);
3804 /* See if an admin user overrode our logging. */
3806 if (cmdline_syslog_name
)
3809 syslog_processname
= cmdline_syslog_name
;
3810 log_file_path
= string_copy(CUS
"syslog");
3813 /* not a panic, non-privileged users should not be able to spam paniclog */
3815 "exim: you lack sufficient privilege to specify syslog process name\n");
3817 /* Paranoia check of maximum lengths of certain strings. There is a check
3818 on the length of the log file path in log.c, which will come into effect
3819 if there are any calls to write the log earlier than this. However, if we
3820 get this far but the string is very long, it is better to stop now than to
3821 carry on and (e.g.) receive a message and then have to collapse. The call to
3822 log_write() from here will cause the ultimate panic collapse if the complete
3823 file name exceeds the buffer length. */
3825 if (Ustrlen(log_file_path
) > 200)
3826 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3827 "log_file_path is longer than 200 chars: aborting");
3829 if (Ustrlen(pid_file_path
) > 200)
3830 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3831 "pid_file_path is longer than 200 chars: aborting");
3833 if (Ustrlen(spool_directory
) > 200)
3834 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3835 "spool_directory is longer than 200 chars: aborting");
3837 /* Length check on the process name given to syslog for its TAG field,
3838 which is only permitted to be 32 characters or less. See RFC 3164. */
3840 if (Ustrlen(syslog_processname
) > 32)
3841 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3842 "syslog_processname is longer than 32 chars: aborting");
3847 log_write(0, LOG_MAIN
, "%s", log_oneline
);
3848 return EXIT_SUCCESS
;
3851 return EXIT_FAILURE
;
3853 /* In some operating systems, the environment variable TMPDIR controls where
3854 temporary files are created; Exim doesn't use these (apart from when delivering
3855 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3856 If TMPDIR is found in the environment, reset it to the value defined in the
3857 EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3858 macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3859 EXIM_TMPDIR by the build scripts.
3863 if (environ
) for (uschar
** p
= USS environ
; *p
; p
++)
3864 if (Ustrncmp(*p
, "TMPDIR=", 7) == 0 && Ustrcmp(*p
+7, EXIM_TMPDIR
) != 0)
3866 uschar
* newp
= store_malloc(Ustrlen(EXIM_TMPDIR
) + 8);
3867 sprintf(CS newp
, "TMPDIR=%s", EXIM_TMPDIR
);
3869 DEBUG(D_any
) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR
);
3873 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3874 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3875 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3876 called by a user who has set the TZ variable. This then affects the timestamps
3877 in log files and in Received: headers, and any created Date: header lines. The
3878 required timezone is settable in the configuration file, so nothing can be done
3879 about this earlier - but hopefully nothing will normally be logged earlier than
3880 this. We have to make a new environment if TZ is wrong, but don't bother if
3881 timestamps_utc is set, because then all times are in UTC anyway. */
3883 if (timezone_string
&& strcmpic(timezone_string
, US
"UTC") == 0)
3884 f
.timestamps_utc
= TRUE
;
3887 uschar
*envtz
= US
getenv("TZ");
3889 ? !timezone_string
|| Ustrcmp(timezone_string
, envtz
) != 0
3890 : timezone_string
!= NULL
3893 uschar
**p
= USS environ
;
3897 if (environ
) while (*p
++) count
++;
3898 if (!envtz
) count
++;
3899 newp
= new = store_malloc(sizeof(uschar
*) * (count
+ 1));
3900 if (environ
) for (p
= USS environ
; *p
; p
++)
3901 if (Ustrncmp(*p
, "TZ=", 3) != 0) *newp
++ = *p
;
3902 if (timezone_string
)
3904 *newp
= store_malloc(Ustrlen(timezone_string
) + 4);
3905 sprintf(CS
*newp
++, "TZ=%s", timezone_string
);
3910 DEBUG(D_any
) debug_printf("Reset TZ to %s: time is %s\n", timezone_string
,
3911 tod_stamp(tod_log
));
3915 /* Handle the case when we have removed the setuid privilege because of -C or
3916 -D. This means that the caller of Exim was not root.
3918 There is a problem if we were running as the Exim user. The sysadmin may
3919 expect this case to retain privilege because "the binary was called by the
3920 Exim user", but it hasn't, because either the -D option set macros, or the
3921 -C option set a non-trusted configuration file. There are two possibilities:
3923 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3924 to do message deliveries. Thus, the fact that it is running as a
3925 non-privileged user is plausible, and might be wanted in some special
3926 configurations. However, really_exim will have been set false when
3927 privilege was dropped, to stop Exim trying to write to its normal log
3928 files. Therefore, re-enable normal log processing, assuming the sysadmin
3929 has set up the log directory correctly.
3931 (2) If deliver_drop_privilege is not set, the configuration won't work as
3932 apparently intended, and so we log a panic message. In order to retain
3933 root for -C or -D, the caller must either be root or be invoking a
3934 trusted configuration file (when deliver_drop_privilege is false). */
3936 if ( removed_privilege
3937 && (!f
.trusted_config
|| opt_D_used
)
3938 && real_uid
== exim_uid
)
3939 if (deliver_drop_privilege
)
3940 f
.really_exim
= TRUE
; /* let logging work normally */
3942 log_write(0, LOG_MAIN
|LOG_PANIC
,
3943 "exim user lost privilege for using %s option",
3944 f
.trusted_config
? "-D" : "-C");
3946 /* Start up Perl interpreter if Perl support is configured and there is a
3947 perl_startup option, and the configuration or the command line specifies
3948 initializing starting. Note that the global variables are actually called
3949 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3952 if (perl_start_option
!= 0)
3953 opt_perl_at_start
= (perl_start_option
> 0);
3954 if (opt_perl_at_start
&& opt_perl_startup
!= NULL
)
3957 DEBUG(D_any
) debug_printf("Starting Perl interpreter\n");
3958 if ((errstr
= init_perl(opt_perl_startup
)))
3959 exim_fail("exim: error in perl_startup code: %s\n", errstr
);
3960 opt_perl_started
= TRUE
;
3962 #endif /* EXIM_PERL */
3964 /* Log the arguments of the call if the configuration file said so. This is
3965 a debugging feature for finding out what arguments certain MUAs actually use.
3966 Don't attempt it if logging is disabled, or if listing variables or if
3967 verifying/testing addresses or expansions. */
3969 if ( (debug_selector
& D_any
|| LOGGING(arguments
))
3970 && f
.really_exim
&& !list_options
&& !checking
)
3972 uschar
*p
= big_buffer
;
3973 Ustrcpy(p
, US
"cwd= (failed)");
3979 Ustrncpy(p
+ 4, initial_cwd
, big_buffer_size
-5);
3980 p
+= 4 + Ustrlen(initial_cwd
);
3981 /* in case p is near the end and we don't provide enough space for
3982 * string_format to be willing to write. */
3986 (void)string_format(p
, big_buffer_size
- (p
- big_buffer
), " %d args:", argc
);
3988 for (int i
= 0; i
< argc
; i
++)
3990 int len
= Ustrlen(argv
[i
]);
3991 const uschar
*printing
;
3993 if (p
+ len
+ 8 >= big_buffer
+ big_buffer_size
)
3995 Ustrcpy(p
, US
" ...");
3996 log_write(0, LOG_MAIN
, "%s", big_buffer
);
3997 Ustrcpy(big_buffer
, US
"...");
4000 printing
= string_printing(argv
[i
]);
4001 if (printing
[0] == 0) quote
= US
"\""; else
4003 const uschar
*pp
= printing
;
4005 while (*pp
!= 0) if (isspace(*pp
++)) { quote
= US
"\""; break; }
4007 p
+= sprintf(CS p
, " %s%.*s%s", quote
, (int)(big_buffer_size
-
4008 (p
- big_buffer
) - 4), printing
, quote
);
4011 if (LOGGING(arguments
))
4012 log_write(0, LOG_MAIN
, "%s", big_buffer
);
4014 debug_printf("%s\n", big_buffer
);
4017 /* Set the working directory to be the top-level spool directory. We don't rely
4018 on this in the code, which always uses fully qualified names, but it's useful
4019 for core dumps etc. Don't complain if it fails - the spool directory might not
4020 be generally accessible and calls with the -C option (and others) have lost
4021 privilege by now. Before the chdir, we try to ensure that the directory exists.
4024 if (Uchdir(spool_directory
) != 0)
4027 (void)directory_make(spool_directory
, US
"", SPOOL_DIRECTORY_MODE
, FALSE
);
4028 dummy
= /* quieten compiler */ Uchdir(spool_directory
);
4029 dummy
= dummy
; /* yet more compiler quietening, sigh */
4032 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
4033 alias file. Exim doesn't have such a concept, but this call is screwed into
4034 Sun's YP makefiles. Handle this by calling a configured script, as the real
4035 user who called Exim. The -oA option can be used to pass an argument to the
4040 (void)fclose(config_file
);
4041 if (bi_command
!= NULL
)
4045 argv
[i
++] = bi_command
;
4046 if (alias_arg
!= NULL
) argv
[i
++] = alias_arg
;
4049 setgroups(group_count
, group_list
);
4050 exim_setugid(real_uid
, real_gid
, FALSE
, US
"running bi_command");
4052 DEBUG(D_exec
) debug_printf("exec %.256s %.256s\n", argv
[0],
4053 (argv
[1] == NULL
)? US
"" : argv
[1]);
4055 execv(CS argv
[0], (char *const *)argv
);
4056 exim_fail("exim: exec failed: %s\n", strerror(errno
));
4060 DEBUG(D_any
) debug_printf("-bi used but bi_command not set; exiting\n");
4065 /* We moved the admin/trusted check to be immediately after reading the
4066 configuration file. We leave these prints here to ensure that syslog setup,
4067 logfile setup, and so on has already happened. */
4069 if (f
.trusted_caller
) DEBUG(D_any
) debug_printf("trusted user\n");
4070 if (f
.admin_user
) DEBUG(D_any
) debug_printf("admin user\n");
4072 /* Only an admin user may start the daemon or force a queue run in the default
4073 configuration, but the queue run restriction can be relaxed. Only an admin
4074 user may request that a message be returned to its sender forthwith. Only an
4075 admin user may specify a debug level greater than D_v (because it might show
4076 passwords, etc. in lookup queries). Only an admin user may request a queue
4077 count. Only an admin user can use the test interface to scan for email
4078 (because Exim will be in the spool dir and able to look at mails). */
4082 BOOL debugset
= (debug_selector
& ~D_v
) != 0;
4083 if ( deliver_give_up
|| f
.daemon_listen
|| malware_test_file
4084 || count_queue
&& queue_list_requires_admin
4085 || list_queue
&& queue_list_requires_admin
4086 || queue_interval
>= 0 && prod_requires_admin
4087 || queue_name_dest
&& prod_requires_admin
4088 || debugset
&& !f
.running_in_test_harness
4090 exim_fail("exim:%s permission denied\n", debugset
? " debugging" : "");
4093 /* If the real user is not root or the exim uid, the argument for passing
4094 in an open TCP/IP connection for another message is not permitted, nor is
4095 running with the -N option for any delivery action, unless this call to exim is
4096 one that supplied an input message, or we are using a patched exim for
4097 regression testing. */
4099 if (real_uid
!= root_uid
&& real_uid
!= exim_uid
&&
4100 (continue_hostname
!= NULL
||
4102 (queue_interval
>= 0 || f
.daemon_listen
|| msg_action_arg
> 0)
4103 )) && !f
.running_in_test_harness
)
4104 exim_fail("exim: Permission denied\n");
4106 /* If the caller is not trusted, certain arguments are ignored when running for
4107 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
4108 Note that authority for performing certain actions on messages is tested in the
4109 queue_action() function. */
4111 if (!f
.trusted_caller
&& !checking
)
4113 sender_host_name
= sender_host_address
= interface_address
=
4114 sender_ident
= received_protocol
= NULL
;
4115 sender_host_port
= interface_port
= 0;
4116 sender_host_authenticated
= authenticated_sender
= authenticated_id
= NULL
;
4119 /* If a sender host address is set, extract the optional port number off the
4120 end of it and check its syntax. Do the same thing for the interface address.
4121 Exim exits if the syntax is bad. */
4125 if (sender_host_address
!= NULL
)
4126 sender_host_port
= check_port(sender_host_address
);
4127 if (interface_address
!= NULL
)
4128 interface_port
= check_port(interface_address
);
4131 /* If the caller is trusted, then they can use -G to suppress_local_fixups. */
4134 if (f
.trusted_caller
)
4136 f
.suppress_local_fixups
= f
.suppress_local_fixups_default
= TRUE
;
4137 DEBUG(D_acl
) debug_printf("suppress_local_fixups forced on by -G\n");
4140 exim_fail("exim: permission denied (-G requires a trusted user)\n");
4143 /* If an SMTP message is being received check to see if the standard input is a
4144 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
4145 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
4150 union sockaddr_46 inetd_sock
;
4151 EXIM_SOCKLEN_T size
= sizeof(inetd_sock
);
4152 if (getpeername(0, (struct sockaddr
*)(&inetd_sock
), &size
) == 0)
4154 int family
= ((struct sockaddr
*)(&inetd_sock
))->sa_family
;
4155 if (family
== AF_INET
|| family
== AF_INET6
)
4157 union sockaddr_46 interface_sock
;
4158 size
= sizeof(interface_sock
);
4160 if (getsockname(0, (struct sockaddr
*)(&interface_sock
), &size
) == 0)
4161 interface_address
= host_ntoa(-1, &interface_sock
, NULL
,
4164 if (host_is_tls_on_connect_port(interface_port
)) tls_in
.on_connect
= TRUE
;
4166 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| interface_port
< 1024)
4169 sender_host_address
= host_ntoa(-1, (struct sockaddr
*)(&inetd_sock
),
4170 NULL
, &sender_host_port
);
4171 if (mua_wrapper
) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Input from "
4172 "inetd is not supported when mua_wrapper is set");
4176 "exim: Permission denied (unprivileged user, unprivileged port)\n");
4181 /* If the load average is going to be needed while receiving a message, get it
4182 now for those OS that require the first call to os_getloadavg() to be done as
4183 root. There will be further calls later for each message received. */
4185 #ifdef LOAD_AVG_NEEDS_ROOT
4186 if ( receiving_message
4187 && (queue_only_load
>= 0 || (f
.is_inetd
&& smtp_load_reserve
>= 0)))
4188 load_average
= OS_GETLOADAVG();
4191 /* The queue_only configuration option can be overridden by -odx on the command
4192 line, except that if queue_only_override is false, queue_only cannot be unset
4193 from the command line. */
4195 if (queue_only_set
&& (queue_only_override
|| arg_queue_only
))
4196 queue_only
= arg_queue_only
;
4198 /* The receive_timeout and smtp_receive_timeout options can be overridden by
4201 if (arg_receive_timeout
>= 0) receive_timeout
= arg_receive_timeout
;
4202 if (arg_smtp_receive_timeout
>= 0)
4203 smtp_receive_timeout
= arg_smtp_receive_timeout
;
4205 /* If Exim was started with root privilege, unless we have already removed the
4206 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
4207 except when starting the daemon or doing some kind of delivery or address
4208 testing (-bt). These are the only cases when root need to be retained. We run
4209 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
4210 retained only for starting the daemon. We always do the initgroups() in this
4211 situation (controlled by the TRUE below), in order to be as close as possible
4212 to the state Exim usually runs in. */
4214 if (!unprivileged
&& /* originally had root AND */
4215 !removed_privilege
&& /* still got root AND */
4216 !f
.daemon_listen
&& /* not starting the daemon */
4217 queue_interval
<= 0 && /* (either kind of daemon) */
4219 deliver_drop_privilege
|| /* requested unprivileged */
4221 queue_interval
< 0 && /* not running the queue */
4222 (msg_action_arg
< 0 || /* and */
4223 msg_action
!= MSG_DELIVER
) && /* not delivering and */
4224 (!checking
|| !f
.address_test_mode
) /* not address checking */
4226 exim_setugid(exim_uid
, exim_gid
, TRUE
, US
"privilege not needed");
4228 /* When we are retaining a privileged uid, we still change to the exim gid. */
4233 DEBUG(D_any
) debug_printf("dropping to exim gid; retaining priv uid\n");
4234 rv
= setgid(exim_gid
);
4235 /* Impact of failure is that some stuff might end up with an incorrect group.
4236 We track this for failures from root, since any attempt to change privilege
4237 by root should succeed and failures should be examined. For non-root,
4238 there's no security risk. For me, it's { exim -bV } on a just-built binary,
4239 no need to complain then. */
4241 if (!(unprivileged
|| removed_privilege
))
4242 exim_fail("exim: changing group failed: %s\n", strerror(errno
));
4244 DEBUG(D_any
) debug_printf("changing group to %ld failed: %s\n",
4245 (long int)exim_gid
, strerror(errno
));
4248 /* Handle a request to scan a file for malware */
4249 if (malware_test_file
)
4251 #ifdef WITH_CONTENT_SCAN
4253 set_process_info("scanning file for malware");
4254 result
= malware_in_file(malware_test_file
);
4257 printf("No malware found.\n");
4262 printf("Malware lookup returned non-okay/fail: %d\n", result
);
4266 printf("Malware found: %s\n", malware_name
);
4268 printf("Malware scan detected malware of unknown name.\n");
4270 printf("Malware scanning not enabled at compile time.\n");
4275 /* Handle a request to list the delivery queue */
4279 set_process_info("listing the queue");
4280 queue_list(list_queue_option
, argv
+ recipients_arg
, argc
- recipients_arg
);
4284 /* Handle a request to count the delivery queue */
4288 set_process_info("counting the queue");
4293 /* Handle actions on specific messages, except for the force delivery and
4294 message load actions, which are done below. Some actions take a whole list of
4295 message ids, which are known to continue up to the end of the arguments. Others
4296 take a single message id and then operate on the recipients list. */
4298 if (msg_action_arg
> 0 && msg_action
!= MSG_DELIVER
&& msg_action
!= MSG_LOAD
)
4300 int yield
= EXIT_SUCCESS
;
4301 set_process_info("acting on specified messages");
4303 /* ACL definitions may be needed when removing a message (-Mrm) because
4304 event_action gets expanded */
4306 if (msg_action
== MSG_REMOVE
)
4309 if (!one_msg_action
)
4311 for (i
= msg_action_arg
; i
< argc
; i
++)
4312 if (!queue_action(argv
[i
], msg_action
, NULL
, 0, 0))
4313 yield
= EXIT_FAILURE
;
4316 case MSG_REMOVE
: MSG_DELETE
: case MSG_FREEZE
: case MSG_THAW
: break;
4317 default: printf("\n"); break;
4321 else if (!queue_action(argv
[msg_action_arg
], msg_action
, argv
, argc
,
4322 recipients_arg
)) yield
= EXIT_FAILURE
;
4326 /* We used to set up here to skip reading the ACL section, on
4327 (msg_action_arg > 0 || (queue_interval == 0 && !f.daemon_listen)
4328 Now, since the intro of the ${acl } expansion, ACL definitions may be
4329 needed in transports so we lost the optimisation. */
4332 #ifdef MEASURE_TIMING
4333 struct timeval t0
, diff
;
4334 (void)gettimeofday(&t0
, NULL
);
4339 #ifdef MEASURE_TIMING
4340 report_time_since(&t0
, US
"readconf_rest (delta)");
4344 /* Handle the -brt option. This is for checking out retry configurations.
4345 The next three arguments are a domain name or a complete address, and
4346 optionally two error numbers. All it does is to call the function that
4347 scans the retry configuration data. */
4349 if (test_retry_arg
>= 0)
4351 retry_config
*yield
;
4352 int basic_errno
= 0;
4356 if (test_retry_arg
>= argc
)
4358 printf("-brt needs a domain or address argument\n");
4359 exim_exit(EXIT_FAILURE
, US
"main");
4361 s1
= argv
[test_retry_arg
++];
4364 /* If the first argument contains no @ and no . it might be a local user
4365 or it might be a single-component name. Treat as a domain. */
4367 if (Ustrchr(s1
, '@') == NULL
&& Ustrchr(s1
, '.') == NULL
)
4369 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
4370 "being \ntreated as a one-component domain, not as a local part.\n\n",
4374 /* There may be an optional second domain arg. */
4376 if (test_retry_arg
< argc
&& Ustrchr(argv
[test_retry_arg
], '.') != NULL
)
4377 s2
= argv
[test_retry_arg
++];
4379 /* The final arg is an error name */
4381 if (test_retry_arg
< argc
)
4383 uschar
*ss
= argv
[test_retry_arg
];
4385 readconf_retry_error(ss
, ss
+ Ustrlen(ss
), &basic_errno
, &more_errno
);
4388 printf("%s\n", CS error
);
4389 return EXIT_FAILURE
;
4392 /* For the {MAIL,RCPT,DATA}_4xx errors, a value of 255 means "any", and a
4393 code > 100 as an error is for matching codes to the decade. Turn them into
4394 a real error code, off the decade. */
4396 if (basic_errno
== ERRNO_MAIL4XX
||
4397 basic_errno
== ERRNO_RCPT4XX
||
4398 basic_errno
== ERRNO_DATA4XX
)
4400 int code
= (more_errno
>> 8) & 255;
4402 more_errno
= (more_errno
& 0xffff00ff) | (21 << 8);
4403 else if (code
> 100)
4404 more_errno
= (more_errno
& 0xffff00ff) | ((code
- 96) << 8);
4408 if (!(yield
= retry_find_config(s1
, s2
, basic_errno
, more_errno
)))
4409 printf("No retry information found\n");
4412 more_errno
= yield
->more_errno
;
4413 printf("Retry rule: %s ", yield
->pattern
);
4415 if (yield
->basic_errno
== ERRNO_EXIMQUOTA
)
4417 printf("quota%s%s ",
4418 (more_errno
> 0)? "_" : "",
4419 (more_errno
> 0)? readconf_printtime(more_errno
) : US
"");
4421 else if (yield
->basic_errno
== ECONNREFUSED
)
4423 printf("refused%s%s ",
4424 (more_errno
> 0)? "_" : "",
4425 (more_errno
== 'M')? "MX" :
4426 (more_errno
== 'A')? "A" : "");
4428 else if (yield
->basic_errno
== ETIMEDOUT
)
4431 if ((more_errno
& RTEF_CTOUT
) != 0) printf("_connect");
4433 if (more_errno
!= 0) printf("_%s",
4434 (more_errno
== 'M')? "MX" : "A");
4437 else if (yield
->basic_errno
== ERRNO_AUTHFAIL
)
4438 printf("auth_failed ");
4441 for (retry_rule
* r
= yield
->rules
; r
; r
= r
->next
)
4443 printf("%c,%s", r
->rule
, readconf_printtime(r
->timeout
)); /* Do not */
4444 printf(",%s", readconf_printtime(r
->p1
)); /* amalgamate */
4450 printf(",%d.", x
/1000);
4464 exim_exit(EXIT_SUCCESS
, US
"main");
4467 /* Handle a request to list one or more configuration options */
4468 /* If -n was set, we suppress some information */
4473 set_process_info("listing variables");
4474 if (recipients_arg
>= argc
)
4475 fail
= !readconf_print(US
"all", NULL
, flag_n
);
4476 else for (i
= recipients_arg
; i
< argc
; i
++)
4479 (Ustrcmp(argv
[i
], "router") == 0 ||
4480 Ustrcmp(argv
[i
], "transport") == 0 ||
4481 Ustrcmp(argv
[i
], "authenticator") == 0 ||
4482 Ustrcmp(argv
[i
], "macro") == 0 ||
4483 Ustrcmp(argv
[i
], "environment") == 0))
4485 fail
|= !readconf_print(argv
[i
+1], argv
[i
], flag_n
);
4489 fail
= !readconf_print(argv
[i
], NULL
, flag_n
);
4491 exim_exit(fail
? EXIT_FAILURE
: EXIT_SUCCESS
, US
"main");
4496 set_process_info("listing config");
4497 exim_exit(readconf_print(US
"config", NULL
, flag_n
)
4498 ? EXIT_SUCCESS
: EXIT_FAILURE
, US
"main");
4502 /* Initialise subsystems as required. */
4506 /* Handle a request to deliver one or more messages that are already on the
4507 queue. Values of msg_action other than MSG_DELIVER and MSG_LOAD are dealt with
4508 above. MSG_LOAD is handled with -be (which is the only time it applies) below.
4510 Delivery of specific messages is typically used for a small number when
4511 prodding by hand (when the option forced_delivery will be set) or when
4512 re-execing to regain root privilege. Each message delivery must happen in a
4513 separate process, so we fork a process for each one, and run them sequentially
4514 so that debugging output doesn't get intertwined, and to avoid spawning too
4515 many processes if a long list is given. However, don't fork for the last one;
4516 this saves a process in the common case when Exim is called to deliver just one
4519 if (msg_action_arg
> 0 && msg_action
!= MSG_LOAD
)
4521 if (prod_requires_admin
&& !f
.admin_user
)
4523 fprintf(stderr
, "exim: Permission denied\n");
4524 exim_exit(EXIT_FAILURE
, US
"main");
4526 set_process_info("delivering specified messages");
4527 if (deliver_give_up
) forced_delivery
= f
.deliver_force_thaw
= TRUE
;
4528 for (i
= msg_action_arg
; i
< argc
; i
++)
4533 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
4534 else if ((pid
= fork()) == 0)
4536 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
4537 exim_underbar_exit(EXIT_SUCCESS
);
4541 fprintf(stderr
, "failed to fork delivery process for %s: %s\n", argv
[i
],
4543 exim_exit(EXIT_FAILURE
, US
"main");
4547 exim_exit(EXIT_SUCCESS
, US
"main");
4551 /* If only a single queue run is requested, without SMTP listening, we can just
4552 turn into a queue runner, with an optional starting message id. */
4554 if (queue_interval
== 0 && !f
.daemon_listen
)
4556 DEBUG(D_queue_run
) debug_printf("Single queue run%s%s%s%s\n",
4557 (start_queue_run_id
== NULL
)? US
"" : US
" starting at ",
4558 (start_queue_run_id
== NULL
)? US
"" : start_queue_run_id
,
4559 (stop_queue_run_id
== NULL
)? US
"" : US
" stopping at ",
4560 (stop_queue_run_id
== NULL
)? US
"" : stop_queue_run_id
);
4562 set_process_info("running the '%s' queue (single queue run)", queue_name
);
4564 set_process_info("running the queue (single queue run)");
4565 queue_run(start_queue_run_id
, stop_queue_run_id
, FALSE
);
4566 exim_exit(EXIT_SUCCESS
, US
"main");
4570 /* Find the login name of the real user running this process. This is always
4571 needed when receiving a message, because it is written into the spool file. It
4572 may also be used to construct a from: or a sender: header, and in this case we
4573 need the user's full name as well, so save a copy of it, checked for RFC822
4574 syntax and munged if necessary, if it hasn't previously been set by the -F
4575 argument. We may try to get the passwd entry more than once, in case NIS or
4576 other delays are in evidence. Save the home directory for use in filter testing
4581 if ((pw
= getpwuid(real_uid
)) != NULL
)
4583 originator_login
= string_copy(US pw
->pw_name
);
4584 originator_home
= string_copy(US pw
->pw_dir
);
4586 /* If user name has not been set by -F, set it from the passwd entry
4587 unless -f has been used to set the sender address by a trusted user. */
4589 if (!originator_name
)
4591 if (!sender_address
|| (!f
.trusted_caller
&& filter_test
== FTEST_NONE
))
4593 uschar
*name
= US pw
->pw_gecos
;
4594 uschar
*amp
= Ustrchr(name
, '&');
4597 /* Most Unix specify that a '&' character in the gecos field is
4598 replaced by a copy of the login name, and some even specify that
4599 the first character should be upper cased, so that's what we do. */
4604 string_format(buffer
, sizeof(buffer
), "%.*s%n%s%s",
4605 (int)(amp
- name
), name
, &loffset
, originator_login
, amp
+ 1);
4606 buffer
[loffset
] = toupper(buffer
[loffset
]);
4610 /* If a pattern for matching the gecos field was supplied, apply
4611 it and then expand the name string. */
4613 if (gecos_pattern
&& gecos_name
)
4616 re
= regex_must_compile(gecos_pattern
, FALSE
, TRUE
); /* Use malloc */
4618 if (regex_match_and_setup(re
, name
, 0, -1))
4620 uschar
*new_name
= expand_string(gecos_name
);
4624 DEBUG(D_receive
) debug_printf("user name \"%s\" extracted from "
4625 "gecos field \"%s\"\n", new_name
, name
);
4628 else DEBUG(D_receive
) debug_printf("failed to expand gecos_name string "
4629 "\"%s\": %s\n", gecos_name
, expand_string_message
);
4631 else DEBUG(D_receive
) debug_printf("gecos_pattern \"%s\" did not match "
4632 "gecos field \"%s\"\n", gecos_pattern
, name
);
4633 store_free((void *)re
);
4635 originator_name
= string_copy(name
);
4638 /* A trusted caller has used -f but not -F */
4640 else originator_name
= US
"";
4643 /* Break the retry loop */
4648 if (++i
> finduser_retries
) break;
4652 /* If we cannot get a user login, log the incident and give up, unless the
4653 configuration specifies something to use. When running in the test harness,
4654 any setting of unknown_login overrides the actual name. */
4656 if (originator_login
== NULL
|| f
.running_in_test_harness
)
4658 if (unknown_login
!= NULL
)
4660 originator_login
= expand_string(unknown_login
);
4661 if (originator_name
== NULL
&& unknown_username
!= NULL
)
4662 originator_name
= expand_string(unknown_username
);
4663 if (originator_name
== NULL
) originator_name
= US
"";
4665 if (originator_login
== NULL
)
4666 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed to get user name for uid %d",
4670 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
4673 originator_name
= string_copy(parse_fix_phrase(originator_name
,
4674 Ustrlen(originator_name
), big_buffer
, big_buffer_size
));
4676 /* If a message is created by this call of Exim, the uid/gid of its originator
4677 are those of the caller. These values are overridden if an existing message is
4678 read in from the spool. */
4680 originator_uid
= real_uid
;
4681 originator_gid
= real_gid
;
4683 DEBUG(D_receive
) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
4684 (int)originator_uid
, (int)originator_gid
, originator_login
, originator_name
);
4686 /* Run in daemon and/or queue-running mode. The function daemon_go() never
4687 returns. We leave this till here so that the originator_ fields are available
4688 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
4691 if (f
.daemon_listen
|| f
.inetd_wait_mode
|| queue_interval
> 0)
4695 fprintf(stderr
, "Daemon cannot be run when mua_wrapper is set\n");
4696 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Daemon cannot be run when "
4697 "mua_wrapper is set");
4700 # ifndef DISABLE_TLS
4701 /* This also checks that the library linkage is working and we can call
4702 routines in it, so call even if tls_require_ciphers is unset */
4704 # ifdef MEASURE_TIMING
4705 struct timeval t0
, diff
;
4706 (void)gettimeofday(&t0
, NULL
);
4708 if (!tls_dropprivs_validate_require_cipher(FALSE
))
4710 # ifdef MEASURE_TIMING
4711 report_time_since(&t0
, US
"validate_ciphers (delta)");
4719 /* If the sender ident has not been set (by a trusted caller) set it to
4720 the caller. This will get overwritten below for an inetd call. If a trusted
4721 caller has set it empty, unset it. */
4723 if (!sender_ident
) sender_ident
= originator_login
;
4724 else if (!*sender_ident
) sender_ident
= NULL
;
4726 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
4727 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
4728 originator_* variables set. */
4730 if (test_rewrite_arg
>= 0)
4732 f
.really_exim
= FALSE
;
4733 if (test_rewrite_arg
>= argc
)
4735 printf("-brw needs an address argument\n");
4736 exim_exit(EXIT_FAILURE
, US
"main");
4738 rewrite_test(argv
[test_rewrite_arg
]);
4739 exim_exit(EXIT_SUCCESS
, US
"main");
4742 /* A locally-supplied message is considered to be coming from a local user
4743 unless a trusted caller supplies a sender address with -f, or is passing in the
4744 message via SMTP (inetd invocation or otherwise). */
4746 if ( !sender_address
&& !smtp_input
4747 || !f
.trusted_caller
&& filter_test
== FTEST_NONE
)
4749 f
.sender_local
= TRUE
;
4751 /* A trusted caller can supply authenticated_sender and authenticated_id
4752 via -oMas and -oMai and if so, they will already be set. Otherwise, force
4753 defaults except when host checking. */
4755 if (!authenticated_sender
&& !host_checking
)
4756 authenticated_sender
= string_sprintf("%s@%s", originator_login
,
4757 qualify_domain_sender
);
4758 if (!authenticated_id
&& !host_checking
)
4759 authenticated_id
= originator_login
;
4762 /* Trusted callers are always permitted to specify the sender address.
4763 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4764 is specified is the empty address. However, if a trusted caller does not
4765 specify a sender address for SMTP input, we leave sender_address unset. This
4766 causes the MAIL commands to be honoured. */
4768 if ( !smtp_input
&& !sender_address
4769 || !receive_check_set_sender(sender_address
))
4771 /* Either the caller is not permitted to set a general sender, or this is
4772 non-SMTP input and the trusted caller has not set a sender. If there is no
4773 sender, or if a sender other than <> is set, override with the originator's
4774 login (which will get qualified below), except when checking things. */
4776 if (sender_address
== NULL
/* No sender_address set */
4778 (sender_address
[0] != 0 && /* Non-empty sender address, AND */
4779 !checking
)) /* Not running tests, including filter tests */
4781 sender_address
= originator_login
;
4782 f
.sender_address_forced
= FALSE
;
4783 sender_address_domain
= 0;
4787 /* Remember whether an untrusted caller set the sender address */
4789 f
.sender_set_untrusted
= sender_address
!= originator_login
&& !f
.trusted_caller
;
4791 /* Ensure that the sender address is fully qualified unless it is the empty
4792 address, which indicates an error message, or doesn't exist (root caller, smtp
4793 interface, no -f argument). */
4795 if (sender_address
&& *sender_address
&& sender_address_domain
== 0)
4796 sender_address
= string_sprintf("%s@%s", local_part_quote(sender_address
),
4797 qualify_domain_sender
);
4799 DEBUG(D_receive
) debug_printf("sender address = %s\n", sender_address
);
4801 /* Handle a request to verify a list of addresses, or test them for delivery.
4802 This must follow the setting of the sender address, since routers can be
4803 predicated upon the sender. If no arguments are given, read addresses from
4804 stdin. Set debug_level to at least D_v to get full output for address testing.
4807 if (verify_address_mode
|| f
.address_test_mode
)
4810 int flags
= vopt_qualify
;
4812 if (verify_address_mode
)
4814 if (!verify_as_sender
) flags
|= vopt_is_recipient
;
4815 DEBUG(D_verify
) debug_print_ids(US
"Verifying:");
4820 flags
|= vopt_is_recipient
;
4821 debug_selector
|= D_v
;
4822 debug_file
= stderr
;
4823 debug_fd
= fileno(debug_file
);
4824 DEBUG(D_verify
) debug_print_ids(US
"Address testing:");
4827 if (recipients_arg
< argc
)
4829 while (recipients_arg
< argc
)
4831 /* Supplied addresses are tainted since they come from a user */
4832 uschar
* s
= string_copy_taint(argv
[recipients_arg
++], TRUE
);
4835 BOOL finished
= FALSE
;
4836 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4837 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4838 test_address(s
, flags
, &exit_value
);
4841 while (*++s
== ',' || isspace(*s
)) ;
4848 uschar
* s
= get_stdinput(NULL
, NULL
);
4850 test_address(string_copy_taint(s
, TRUE
), flags
, &exit_value
);
4854 exim_exit(exit_value
, US
"main");
4857 /* Handle expansion checking. Either expand items on the command line, or read
4858 from stdin if there aren't any. If -Mset was specified, load the message so
4859 that its variables can be used, but restrict this facility to admin users.
4860 Otherwise, if -bem was used, read a message from stdin. */
4864 dns_init(FALSE
, FALSE
, FALSE
);
4865 if (msg_action_arg
> 0 && msg_action
== MSG_LOAD
)
4867 uschar spoolname
[256]; /* Not big_buffer; used in spool_read_header() */
4869 exim_fail("exim: permission denied\n");
4870 message_id
= argv
[msg_action_arg
];
4871 (void)string_format(spoolname
, sizeof(spoolname
), "%s-H", message_id
);
4872 if ((deliver_datafile
= spool_open_datafile(message_id
)) < 0)
4873 printf ("Failed to load message datafile %s\n", message_id
);
4874 if (spool_read_header(spoolname
, TRUE
, FALSE
) != spool_read_OK
)
4875 printf ("Failed to load message %s\n", message_id
);
4878 /* Read a test message from a file. We fudge it up to be on stdin, saving
4879 stdin itself for later reading of expansion strings. */
4881 else if (expansion_test_message
)
4883 int save_stdin
= dup(0);
4884 int fd
= Uopen(expansion_test_message
, O_RDONLY
, 0);
4886 exim_fail("exim: failed to open %s: %s\n", expansion_test_message
,
4889 filter_test
= FTEST_USER
; /* Fudge to make it look like filter test */
4890 message_ended
= END_NOTENDED
;
4891 read_message_body(receive_msg(extract_recipients
));
4892 message_linecount
+= body_linecount
;
4893 (void)dup2(save_stdin
, 0);
4894 (void)close(save_stdin
);
4895 clearerr(stdin
); /* Required by Darwin */
4898 /* Only admin users may see config-file macros this way */
4900 if (!f
.admin_user
) macros_user
= macros
= mlast
= NULL
;
4902 /* Allow $recipients for this testing */
4904 f
.enable_dollar_recipients
= TRUE
;
4906 /* Expand command line items */
4908 if (recipients_arg
< argc
)
4909 while (recipients_arg
< argc
)
4910 expansion_test_line(argv
[recipients_arg
++]);
4916 char *(*fn_readline
)(const char *) = NULL
;
4917 void (*fn_addhist
)(const char *) = NULL
;
4921 void *dlhandle
= set_readline(&fn_readline
, &fn_addhist
);
4924 while (s
= get_stdinput(fn_readline
, fn_addhist
))
4925 expansion_test_line(s
);
4928 if (dlhandle
) dlclose(dlhandle
);
4932 /* The data file will be open after -Mset */
4934 if (deliver_datafile
>= 0)
4936 (void)close(deliver_datafile
);
4937 deliver_datafile
= -1;
4940 exim_exit(EXIT_SUCCESS
, US
"main: expansion test");
4944 /* The active host name is normally the primary host name, but it can be varied
4945 for hosts that want to play several parts at once. We need to ensure that it is
4946 set for host checking, and for receiving messages. */
4948 smtp_active_hostname
= primary_hostname
;
4949 if (raw_active_hostname
!= NULL
)
4951 uschar
*nah
= expand_string(raw_active_hostname
);
4954 if (!f
.expand_string_forcedfail
)
4955 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand \"%s\" "
4956 "(smtp_active_hostname): %s", raw_active_hostname
,
4957 expand_string_message
);
4959 else if (nah
[0] != 0) smtp_active_hostname
= nah
;
4962 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4963 given IP address so that the blocking and relay configuration can be tested.
4964 Unless a sender_ident was set by -oMt, we discard it (the default is the
4965 caller's login name). An RFC 1413 call is made only if we are running in the
4966 test harness and an incoming interface and both ports are specified, because
4967 there is no TCP/IP call to find the ident for. */
4974 if (!sender_ident_set
)
4976 sender_ident
= NULL
;
4977 if (f
.running_in_test_harness
&& sender_host_port
!= 0 &&
4978 interface_address
!= NULL
&& interface_port
!= 0)
4979 verify_get_ident(1413);
4982 /* In case the given address is a non-canonical IPv6 address, canonicalize
4983 it. The code works for both IPv4 and IPv6, as it happens. */
4985 size
= host_aton(sender_host_address
, x
);
4986 sender_host_address
= store_get(48, FALSE
); /* large enough for full IPv6 */
4987 (void)host_nmtoa(size
, x
, -1, sender_host_address
, ':');
4989 /* Now set up for testing */
4991 host_build_sender_fullhost();
4995 f
.sender_local
= FALSE
;
4996 f
.sender_host_notsocket
= TRUE
;
4997 debug_file
= stderr
;
4998 debug_fd
= fileno(debug_file
);
4999 fprintf(stdout
, "\n**** SMTP testing session as if from host %s\n"
5000 "**** but without any ident (RFC 1413) callback.\n"
5001 "**** This is not for real!\n\n",
5002 sender_host_address
);
5004 memset(sender_host_cache
, 0, sizeof(sender_host_cache
));
5005 if (verify_check_host(&hosts_connection_nolog
) == OK
)
5006 BIT_CLEAR(log_selector
, log_selector_size
, Li_smtp_connection
);
5007 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
5009 /* NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5010 because a log line has already been written for all its failure exists
5011 (usually "connection refused: <reason>") and writing another one is
5012 unnecessary clutter. */
5014 if (smtp_start_session())
5016 for (; (reset_point
= store_mark()); store_reset(reset_point
))
5018 if (smtp_setup_msg() <= 0) break;
5019 if (!receive_msg(FALSE
)) break;
5021 return_path
= sender_address
= NULL
;
5022 dnslist_domain
= dnslist_matched
= NULL
;
5023 #ifndef DISABLE_DKIM
5024 dkim_cur_signer
= NULL
;
5027 deliver_localpart_orig
= NULL
;
5028 deliver_domain_orig
= NULL
;
5029 callout_address
= sending_ip_address
= NULL
;
5030 sender_rate
= sender_rate_limit
= sender_rate_period
= NULL
;
5034 exim_exit(EXIT_SUCCESS
, US
"main");
5038 /* Arrange for message reception if recipients or SMTP were specified;
5039 otherwise complain unless a version print (-bV) happened or this is a filter
5040 verification test or info dump.
5041 In the former case, show the configuration file name. */
5043 if (recipients_arg
>= argc
&& !extract_recipients
&& !smtp_input
)
5045 if (version_printed
)
5047 if (Ustrchr(config_main_filelist
, ':'))
5048 printf("Configuration file search path is %s\n", config_main_filelist
);
5049 printf("Configuration file is %s\n", config_main_filename
);
5050 return EXIT_SUCCESS
;
5053 if (info_flag
!= CMDINFO_NONE
)
5055 show_exim_information(info_flag
, info_stdout
? stdout
: stderr
);
5056 return info_stdout
? EXIT_SUCCESS
: EXIT_FAILURE
;
5059 if (filter_test
== FTEST_NONE
)
5060 exim_usage(called_as
);
5064 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
5065 standard input into an MUA that submits to a smarthost over TCP/IP. We know
5066 that we are not called from inetd, because that is rejected above. The
5067 following configuration settings are forced here:
5069 (1) Synchronous delivery (-odi)
5070 (2) Errors to stderr (-oep == -oeq)
5071 (3) No parallel remote delivery
5072 (4) Unprivileged delivery
5074 We don't force overall queueing options because there are several of them;
5075 instead, queueing is avoided below when mua_wrapper is set. However, we do need
5076 to override any SMTP queueing. */
5080 f
.synchronous_delivery
= TRUE
;
5081 arg_error_handling
= ERRORS_STDERR
;
5082 remote_max_parallel
= 1;
5083 deliver_drop_privilege
= TRUE
;
5084 f
.queue_smtp
= FALSE
;
5085 queue_smtp_domains
= NULL
;
5087 message_utf8_downconvert
= -1; /* convert-if-needed */
5092 /* Prepare to accept one or more new messages on the standard input. When a
5093 message has been read, its id is returned in message_id[]. If doing immediate
5094 delivery, we fork a delivery process for each received message, except for the
5095 last one, where we can save a process switch.
5097 It is only in non-smtp mode that error_handling is allowed to be changed from
5098 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
5099 sendmail error modes other than -oem ever actually used? Later: yes.) */
5101 if (!smtp_input
) error_handling
= arg_error_handling
;
5103 /* If this is an inetd call, ensure that stderr is closed to prevent panic
5104 logging being sent down the socket and make an identd call to get the
5107 else if (f
.is_inetd
)
5109 (void)fclose(stderr
);
5110 exim_nullstd(); /* Re-open to /dev/null */
5111 verify_get_ident(IDENT_PORT
);
5112 host_build_sender_fullhost();
5113 set_process_info("handling incoming connection from %s via inetd",
5117 /* If the sender host address has been set, build sender_fullhost if it hasn't
5118 already been done (which it will have been for inetd). This caters for the
5119 case when it is forced by -oMa. However, we must flag that it isn't a socket,
5120 so that the test for IP options is skipped for -bs input. */
5122 if (sender_host_address
&& !sender_fullhost
)
5124 host_build_sender_fullhost();
5125 set_process_info("handling incoming connection from %s via -oMa",
5127 f
.sender_host_notsocket
= TRUE
;
5130 /* Otherwise, set the sender host as unknown except for inetd calls. This
5131 prevents host checking in the case of -bs not from inetd and also for -bS. */
5133 else if (!f
.is_inetd
) f
.sender_host_unknown
= TRUE
;
5135 /* If stdout does not exist, then dup stdin to stdout. This can happen
5136 if exim is started from inetd. In this case fd 0 will be set to the socket,
5137 but fd 1 will not be set. This also happens for passed SMTP channels. */
5139 if (fstat(1, &statbuf
) < 0) (void)dup2(0, 1);
5141 /* Set up the incoming protocol name and the state of the program. Root is
5142 allowed to force received protocol via the -oMr option above. If we have come
5143 via inetd, the process info has already been set up. We don't set
5144 received_protocol here for smtp input, as it varies according to
5145 batch/HELO/EHLO/AUTH/TLS. */
5149 if (!f
.is_inetd
) set_process_info("accepting a local %sSMTP message from <%s>",
5150 smtp_batched_input
? "batched " : "",
5151 (sender_address
!= NULL
)? sender_address
: originator_login
);
5155 int old_pool
= store_pool
;
5156 store_pool
= POOL_PERM
;
5157 if (!received_protocol
)
5158 received_protocol
= string_sprintf("local%s", called_as
);
5159 store_pool
= old_pool
;
5160 set_process_info("accepting a local non-SMTP message from <%s>",
5164 /* Initialize the session_local_queue-only flag (this will be ignored if
5165 mua_wrapper is set) */
5168 session_local_queue_only
= queue_only
;
5170 /* For non-SMTP and for batched SMTP input, check that there is enough space on
5171 the spool if so configured. On failure, we must not attempt to send an error
5172 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
5173 error code is given.) */
5175 if ((!smtp_input
|| smtp_batched_input
) && !receive_check_fs(0))
5176 exim_fail("exim: insufficient disk space\n");
5178 /* If this is smtp input of any kind, real or batched, handle the start of the
5181 NOTE: We do *not* call smtp_log_no_mail() if smtp_start_session() fails,
5182 because a log line has already been written for all its failure exists
5183 (usually "connection refused: <reason>") and writing another one is
5184 unnecessary clutter. */
5190 memset(sender_host_cache
, 0, sizeof(sender_host_cache
));
5191 if (verify_check_host(&hosts_connection_nolog
) == OK
)
5192 BIT_CLEAR(log_selector
, log_selector_size
, Li_smtp_connection
);
5193 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
5194 if (!smtp_start_session())
5197 exim_exit(EXIT_SUCCESS
, US
"smtp_start toplevel");
5201 /* Otherwise, set up the input size limit here. */
5205 thismessage_size_limit
= expand_string_integer(message_size_limit
, TRUE
);
5206 if (expand_string_message
)
5207 if (thismessage_size_limit
== -1)
5208 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand "
5209 "message_size_limit: %s", expand_string_message
);
5211 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "invalid value for "
5212 "message_size_limit: %s", expand_string_message
);
5215 /* Loop for several messages when reading SMTP input. If we fork any child
5216 processes, we don't want to wait for them unless synchronous delivery is
5217 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
5218 same as SIG_DFL, despite the fact that documentation often lists the default as
5219 "ignore". This is a confusing area. This is what I know:
5221 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
5222 processes that complete simply to go away without ever becoming defunct. You
5223 can't then wait for them - but we don't want to wait for them in the
5224 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
5225 happen for all OS (e.g. *BSD is different).
5227 But that's not the end of the story. Some (many? all?) systems have the
5228 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
5229 has by default, so it seems that the difference is merely one of default
5230 (compare restarting vs non-restarting signals).
5232 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
5233 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
5234 of the loop below. Paranoia rules.
5236 February 2003: That's *still* not the end of the story. There are now versions
5237 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
5238 process then calls waitpid(), a grumble is written to the system log, because
5239 this is logically inconsistent. In other words, it doesn't like the paranoia.
5240 As a consequence of this, the waitpid() below is now excluded if we are sure
5241 that SIG_IGN works. */
5243 if (!f
.synchronous_delivery
)
5246 struct sigaction act
;
5247 act
.sa_handler
= SIG_IGN
;
5248 sigemptyset(&(act
.sa_mask
));
5249 act
.sa_flags
= SA_NOCLDWAIT
;
5250 sigaction(SIGCHLD
, &act
, NULL
);
5252 signal(SIGCHLD
, SIG_IGN
);
5256 /* Save the current store pool point, for resetting at the start of
5257 each message, and save the real sender address, if any. */
5259 real_sender_address
= sender_address
;
5261 /* Loop to receive messages; receive_msg() returns TRUE if there are more
5262 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
5267 reset_point
= store_mark();
5270 /* Handle the SMTP case; call smtp_setup_mst() to deal with the initial SMTP
5271 input and build the recipients list, before calling receive_msg() to read the
5272 message proper. Whatever sender address is given in the SMTP transaction is
5273 often ignored for local senders - we use the actual sender, which is normally
5274 either the underlying user running this process or a -f argument provided by
5275 a trusted caller. It is saved in real_sender_address. The test for whether to
5276 accept the SMTP sender is encapsulated in receive_check_set_sender(). */
5281 if ((rc
= smtp_setup_msg()) > 0)
5283 if (real_sender_address
!= NULL
&&
5284 !receive_check_set_sender(sender_address
))
5286 sender_address
= raw_sender
= real_sender_address
;
5287 sender_address_unrewritten
= NULL
;
5290 /* For batched SMTP, we have to run the acl_not_smtp_start ACL, since it
5291 isn't really SMTP, so no other ACL will run until the acl_not_smtp one at
5292 the very end. The result of the ACL is ignored (as for other non-SMTP
5293 messages). It is run for its potential side effects. */
5295 if (smtp_batched_input
&& acl_not_smtp_start
!= NULL
)
5297 uschar
*user_msg
, *log_msg
;
5298 f
.enable_dollar_recipients
= TRUE
;
5299 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
5300 &user_msg
, &log_msg
);
5301 f
.enable_dollar_recipients
= FALSE
;
5304 /* Now get the data for the message */
5306 more
= receive_msg(extract_recipients
);
5307 if (message_id
[0] == 0)
5309 cancel_cutthrough_connection(TRUE
, US
"receive dropped");
5310 if (more
) goto moreloop
;
5311 smtp_log_no_mail(); /* Log no mail if configured */
5312 exim_exit(EXIT_FAILURE
, US
"receive toplevel");
5317 cancel_cutthrough_connection(TRUE
, US
"message setup dropped");
5318 smtp_log_no_mail(); /* Log no mail if configured */
5319 exim_exit(rc
? EXIT_FAILURE
: EXIT_SUCCESS
, US
"msg setup toplevel");
5323 /* In the non-SMTP case, we have all the information from the command
5324 line, but must process it in case it is in the more general RFC822
5325 format, and in any case, to detect syntax errors. Also, it appears that
5326 the use of comma-separated lists as single arguments is common, so we
5327 had better support them. */
5332 int count
= argc
- recipients_arg
;
5333 uschar
**list
= argv
+ recipients_arg
;
5335 /* These options cannot be changed dynamically for non-SMTP messages */
5337 f
.active_local_sender_retain
= local_sender_retain
;
5338 f
.active_local_from_check
= local_from_check
;
5340 /* Save before any rewriting */
5342 raw_sender
= string_copy(sender_address
);
5344 /* Loop for each argument (supplied by user hence tainted) */
5346 for (int i
= 0; i
< count
; i
++)
5348 int start
, end
, domain
;
5350 uschar
* s
= string_copy_taint(list
[i
], TRUE
);
5352 /* Loop for each comma-separated address */
5356 BOOL finished
= FALSE
;
5358 uschar
*ss
= parse_find_address_end(s
, FALSE
);
5360 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
5362 /* Check max recipients - if -t was used, these aren't recipients */
5364 if (recipients_max
> 0 && ++rcount
> recipients_max
&&
5365 !extract_recipients
)
5366 if (error_handling
== ERRORS_STDERR
)
5368 fprintf(stderr
, "exim: too many recipients\n");
5369 exim_exit(EXIT_FAILURE
, US
"main");
5373 moan_to_sender(ERRMESS_TOOMANYRECIP
, NULL
, NULL
, stdin
, TRUE
)?
5374 errors_sender_rc
: EXIT_FAILURE
;
5378 BOOL b
= allow_utf8_domains
;
5379 allow_utf8_domains
= TRUE
;
5382 parse_extract_address(s
, &errmess
, &start
, &end
, &domain
, FALSE
);
5385 if (string_is_utf8(recipient
))
5386 message_smtputf8
= TRUE
;
5388 allow_utf8_domains
= b
;
5391 if (domain
== 0 && !f
.allow_unqualified_recipient
)
5394 errmess
= US
"unqualified recipient address not allowed";
5397 if (recipient
== NULL
)
5399 if (error_handling
== ERRORS_STDERR
)
5401 fprintf(stderr
, "exim: bad recipient address \"%s\": %s\n",
5402 string_printing(list
[i
]), errmess
);
5403 exim_exit(EXIT_FAILURE
, US
"main");
5409 eblock
.text1
= string_printing(list
[i
]);
5410 eblock
.text2
= errmess
;
5412 moan_to_sender(ERRMESS_BADARGADDRESS
, &eblock
, NULL
, stdin
, TRUE
)?
5413 errors_sender_rc
: EXIT_FAILURE
;
5417 receive_add_recipient(string_copy_taint(recipient
, TRUE
), -1);
5420 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
5424 /* Show the recipients when debugging */
5428 if (sender_address
!= NULL
) debug_printf("Sender: %s\n", sender_address
);
5429 if (recipients_list
!= NULL
)
5431 debug_printf("Recipients:\n");
5432 for (int i
= 0; i
< recipients_count
; i
++)
5433 debug_printf(" %s\n", recipients_list
[i
].address
);
5437 /* Run the acl_not_smtp_start ACL if required. The result of the ACL is
5438 ignored; rejecting here would just add complication, and it can just as
5439 well be done later. Allow $recipients to be visible in the ACL. */
5441 if (acl_not_smtp_start
)
5443 uschar
*user_msg
, *log_msg
;
5444 f
.enable_dollar_recipients
= TRUE
;
5445 (void)acl_check(ACL_WHERE_NOTSMTP_START
, NULL
, acl_not_smtp_start
,
5446 &user_msg
, &log_msg
);
5447 f
.enable_dollar_recipients
= FALSE
;
5450 /* Pause for a while waiting for input. If none received in that time,
5451 close the logfile, if we had one open; then if we wait for a long-running
5452 datasource (months, in one use-case) log rotation will not leave us holding
5455 if (!receive_timeout
)
5457 struct timeval t
= { .tv_sec
= 30*60, .tv_usec
= 0 }; /* 30 minutes */
5460 FD_ZERO(&r
); FD_SET(0, &r
);
5461 if (select(1, &r
, NULL
, NULL
, &t
) == 0) mainlog_close();
5464 /* Read the data for the message. If filter_test is not FTEST_NONE, this
5465 will just read the headers for the message, and not write anything onto the
5468 message_ended
= END_NOTENDED
;
5469 more
= receive_msg(extract_recipients
);
5471 /* more is always FALSE here (not SMTP message) when reading a message
5472 for real; when reading the headers of a message for filter testing,
5473 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
5475 if (message_id
[0] == 0) exim_exit(EXIT_FAILURE
, US
"main");
5476 } /* Non-SMTP message reception */
5478 /* If this is a filter testing run, there are headers in store, but
5479 no message on the spool. Run the filtering code in testing mode, setting
5480 the domain to the qualify domain and the local part to the current user,
5481 unless they have been set by options. The prefix and suffix are left unset
5482 unless specified. The the return path is set to to the sender unless it has
5483 already been set from a return-path header in the message. */
5485 if (filter_test
!= FTEST_NONE
)
5487 deliver_domain
= (ftest_domain
!= NULL
)?
5488 ftest_domain
: qualify_domain_recipient
;
5489 deliver_domain_orig
= deliver_domain
;
5490 deliver_localpart
= (ftest_localpart
!= NULL
)?
5491 ftest_localpart
: originator_login
;
5492 deliver_localpart_orig
= deliver_localpart
;
5493 deliver_localpart_prefix
= ftest_prefix
;
5494 deliver_localpart_suffix
= ftest_suffix
;
5495 deliver_home
= originator_home
;
5497 if (return_path
== NULL
)
5499 printf("Return-path copied from sender\n");
5500 return_path
= string_copy(sender_address
);
5503 printf("Return-path = %s\n", (return_path
[0] == 0)? US
"<>" : return_path
);
5504 printf("Sender = %s\n", (sender_address
[0] == 0)? US
"<>" : sender_address
);
5506 receive_add_recipient(
5507 string_sprintf("%s%s%s@%s",
5508 (ftest_prefix
== NULL
)? US
"" : ftest_prefix
,
5510 (ftest_suffix
== NULL
)? US
"" : ftest_suffix
,
5511 deliver_domain
), -1);
5513 printf("Recipient = %s\n", recipients_list
[0].address
);
5514 if (ftest_prefix
!= NULL
) printf("Prefix = %s\n", ftest_prefix
);
5515 if (ftest_suffix
!= NULL
) printf("Suffix = %s\n", ftest_suffix
);
5517 if (chdir("/")) /* Get away from wherever the user is running this from */
5519 DEBUG(D_receive
) debug_printf("chdir(\"/\") failed\n");
5520 exim_exit(EXIT_FAILURE
, US
"main");
5523 /* Now we run either a system filter test, or a user filter test, or both.
5524 In the latter case, headers added by the system filter will persist and be
5525 available to the user filter. We need to copy the filter variables
5528 if ((filter_test
& FTEST_SYSTEM
) != 0)
5529 if (!filter_runtest(filter_sfd
, filter_test_sfile
, TRUE
, more
))
5530 exim_exit(EXIT_FAILURE
, US
"main");
5532 memcpy(filter_sn
, filter_n
, sizeof(filter_sn
));
5534 if ((filter_test
& FTEST_USER
) != 0)
5535 if (!filter_runtest(filter_ufd
, filter_test_ufile
, FALSE
, more
))
5536 exim_exit(EXIT_FAILURE
, US
"main");
5538 exim_exit(EXIT_SUCCESS
, US
"main");
5541 /* Else act on the result of message reception. We should not get here unless
5542 message_id[0] is non-zero. If queue_only is set, session_local_queue_only
5543 will be TRUE. If it is not, check on the number of messages received in this
5546 if (!session_local_queue_only
&&
5547 smtp_accept_queue_per_connection
> 0 &&
5548 receive_messagecount
> smtp_accept_queue_per_connection
)
5550 session_local_queue_only
= TRUE
;
5551 queue_only_reason
= 2;
5554 /* Initialize local_queue_only from session_local_queue_only. If it is false,
5555 and queue_only_load is set, check that the load average is below it. If it is
5556 not, set local_queue_only TRUE. If queue_only_load_latch is true (the
5557 default), we put the whole session into queue_only mode. It then remains this
5558 way for any subsequent messages on the same SMTP connection. This is a
5559 deliberate choice; even though the load average may fall, it doesn't seem
5560 right to deliver later messages on the same call when not delivering earlier
5561 ones. However, there are odd cases where this is not wanted, so this can be
5562 changed by setting queue_only_load_latch false. */
5564 local_queue_only
= session_local_queue_only
;
5565 if (!local_queue_only
&& queue_only_load
>= 0)
5567 local_queue_only
= (load_average
= OS_GETLOADAVG()) > queue_only_load
;
5568 if (local_queue_only
)
5570 queue_only_reason
= 3;
5571 if (queue_only_load_latch
) session_local_queue_only
= TRUE
;
5575 /* If running as an MUA wrapper, all queueing options and freezing options
5579 local_queue_only
= f
.queue_only_policy
= f
.deliver_freeze
= FALSE
;
5581 /* Log the queueing here, when it will get a message id attached, but
5582 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
5585 if (local_queue_only
)
5587 cancel_cutthrough_connection(TRUE
, US
"no delivery; queueing");
5588 switch(queue_only_reason
)
5591 log_write(L_delay_delivery
,
5592 LOG_MAIN
, "no immediate delivery: more than %d messages "
5593 "received in one connection", smtp_accept_queue_per_connection
);
5597 log_write(L_delay_delivery
,
5598 LOG_MAIN
, "no immediate delivery: load average %.2f",
5599 (double)load_average
/1000.0);
5604 else if (f
.queue_only_policy
|| f
.deliver_freeze
)
5605 cancel_cutthrough_connection(TRUE
, US
"no delivery; queueing");
5607 /* Else do the delivery unless the ACL or local_scan() called for queue only
5608 or froze the message. Always deliver in a separate process. A fork failure is
5609 not a disaster, as the delivery will eventually happen on a subsequent queue
5610 run. The search cache must be tidied before the fork, as the parent will
5611 do it before exiting. The child will trigger a lookup failure and
5612 thereby defer the delivery if it tries to use (for example) a cached ldap
5613 connection that the parent has called unbind on. */
5620 if ((pid
= fork()) == 0)
5623 close_unwanted(); /* Close unwanted file descriptors and TLS */
5624 exim_nullstd(); /* Ensure std{in,out,err} exist */
5626 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
5627 mode, deliver_drop_privilege is forced TRUE). */
5629 if (geteuid() != root_uid
&& !deliver_drop_privilege
&& !unprivileged
)
5631 delivery_re_exec(CEE_EXEC_EXIT
);
5632 /* Control does not return here. */
5635 /* No need to re-exec */
5637 rc
= deliver_message(message_id
, FALSE
, FALSE
);
5639 exim_underbar_exit(!mua_wrapper
|| rc
== DELIVER_MUA_SUCCEEDED
5640 ? EXIT_SUCCESS
: EXIT_FAILURE
);
5645 cancel_cutthrough_connection(TRUE
, US
"delivery fork failed");
5646 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to fork automatic delivery "
5647 "process: %s", strerror(errno
));
5651 release_cutthrough_connection(US
"msg passed for delivery");
5653 /* In the parent, wait if synchronous delivery is required. This will
5654 always be the case in MUA wrapper mode. */
5656 if (f
.synchronous_delivery
)
5659 while (wait(&status
) != pid
);
5660 if ((status
& 0x00ff) != 0)
5661 log_write(0, LOG_MAIN
|LOG_PANIC
,
5662 "process %d crashed with signal %d while delivering %s",
5663 (int)pid
, status
& 0x00ff, message_id
);
5664 if (mua_wrapper
&& (status
& 0xffff) != 0) exim_exit(EXIT_FAILURE
, US
"main");
5669 /* The loop will repeat if more is TRUE. If we do not know know that the OS
5670 automatically reaps children (see comments above the loop), clear away any
5671 finished subprocesses here, in case there are lots of messages coming in
5672 from the same source. */
5674 #ifndef SIG_IGN_WORKS
5675 while (waitpid(-1, NULL
, WNOHANG
) > 0);
5679 return_path
= sender_address
= NULL
;
5680 authenticated_sender
= NULL
;
5681 deliver_localpart_orig
= NULL
;
5682 deliver_domain_orig
= NULL
;
5683 deliver_host
= deliver_host_address
= NULL
;
5684 dnslist_domain
= dnslist_matched
= NULL
;
5685 #ifdef WITH_CONTENT_SCAN
5686 malware_name
= NULL
;
5688 callout_address
= NULL
;
5689 sending_ip_address
= NULL
;
5691 for(int i
= 0; i
< REGEX_VARS
; i
++) regex_vars
[i
] = NULL
;
5693 store_reset(reset_point
);
5696 exim_exit(EXIT_SUCCESS
, US
"main"); /* Never returns */
5697 return 0; /* To stop compiler warning */