1 /* $Cambridge: exim/src/src/exim.c,v 1.26 2005/08/23 11:25:38 ph10 Exp $ */
3 /*************************************************
4 * Exim - an Internet mail transport agent *
5 *************************************************/
7 /* Copyright (c) University of Cambridge 1995 - 2005 */
8 /* See the file NOTICE for conditions of use and distribution. */
11 /* The main function: entry point, initialization, and high-level control.
12 Also a few functions that don't naturally fit elsewhere. */
19 /*************************************************
20 * Function interface to store functions *
21 *************************************************/
23 /* We need some real functions to pass to the PCRE regular expression library
24 for store allocation via Exim's store manager. The normal calls are actually
25 macros that pass over location information to make tracing easier. These
26 functions just interface to the standard macro calls. A good compiler will
27 optimize out the tail recursion and so not make them too expensive. There
28 are two sets of functions; one for use when we want to retain the compiled
29 regular expression for a long time; the other for short-term use. */
32 function_store_get(size_t size
)
34 return store_get((int)size
);
38 function_dummy_free(void *block
) { block
= block
; }
41 function_store_malloc(size_t size
)
43 return store_malloc((int)size
);
47 function_store_free(void *block
)
55 /*************************************************
56 * Compile regular expression and panic on fail *
57 *************************************************/
59 /* This function is called when failure to compile a regular expression leads
60 to a panic exit. In other cases, pcre_compile() is called directly. In many
61 cases where this function is used, the results of the compilation are to be
62 placed in long-lived store, so we temporarily reset the store management
63 functions that PCRE uses if the use_malloc flag is set.
66 pattern the pattern to compile
67 caseless TRUE if caseless matching is required
68 use_malloc TRUE if compile into malloc store
70 Returns: pointer to the compiled pattern
74 regex_must_compile(uschar
*pattern
, BOOL caseless
, BOOL use_malloc
)
77 int options
= PCRE_COPT
;
82 pcre_malloc
= function_store_malloc
;
83 pcre_free
= function_store_free
;
85 if (caseless
) options
|= PCRE_CASELESS
;
86 yield
= pcre_compile(CS pattern
, options
, (const char **)&error
, &offset
, NULL
);
87 pcre_malloc
= function_store_get
;
88 pcre_free
= function_dummy_free
;
90 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "regular expression error: "
91 "%s at offset %d while compiling %s", error
, offset
, pattern
);
98 /*************************************************
99 * Execute regular expression and set strings *
100 *************************************************/
102 /* This function runs a regular expression match, and sets up the pointers to
103 the matched substrings.
106 re the compiled expression
107 subject the subject string
108 options additional PCRE options
109 setup if < 0 do full setup
110 if >= 0 setup from setup+1 onwards,
111 excluding the full matched string
113 Returns: TRUE or FALSE
117 regex_match_and_setup(const pcre
*re
, uschar
*subject
, int options
, int setup
)
119 int ovector
[3*(EXPAND_MAXN
+1)];
120 int n
= pcre_exec(re
, NULL
, CS subject
, Ustrlen(subject
), 0,
121 PCRE_EOPT
| options
, ovector
, sizeof(ovector
)/sizeof(int));
123 if (n
== 0) n
= EXPAND_MAXN
+ 1;
127 expand_nmax
= (setup
< 0)? 0 : setup
+ 1;
128 for (nn
= (setup
< 0)? 0 : 2; nn
< n
*2; nn
+= 2)
130 expand_nstring
[expand_nmax
] = subject
+ ovector
[nn
];
131 expand_nlength
[expand_nmax
++] = ovector
[nn
+1] - ovector
[nn
];
141 /*************************************************
142 * Handler for SIGUSR1 *
143 *************************************************/
145 /* SIGUSR1 causes any exim process to write to the process log details of
146 what it is currently doing. It will only be used if the OS is capable of
147 setting up a handler that causes automatic restarting of any system call
148 that is in progress at the time.
150 Argument: the signal number (SIGUSR1)
155 usr1_handler(int sig
)
157 sig
= sig
; /* Keep picky compilers happy */
158 log_write(0, LOG_PROCESS
, "%s", process_info
);
160 os_restarting_signal(SIGUSR1
, usr1_handler
);
165 /*************************************************
167 *************************************************/
169 /* This handler is enabled most of the time that Exim is running. The handler
170 doesn't actually get used unless alarm() has been called to set a timer, to
171 place a time limit on a system call of some kind. When the handler is run, it
174 There are some other SIGALRM handlers that are used in special cases when more
175 than just a flag setting is required; for example, when reading a message's
176 input. These are normally set up in the code module that uses them, and the
177 SIGALRM handler is reset to this one afterwards.
179 Argument: the signal value (SIGALRM)
184 sigalrm_handler(int sig
)
186 sig
= sig
; /* Keep picky compilers happy */
188 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
193 /*************************************************
194 * Sleep for a fractional time interval *
195 *************************************************/
197 /* This function is called by millisleep() and exim_wait_tick() to wait for a
198 period of time that may include a fraction of a second. The coding is somewhat
199 tedious. We do not expect setitimer() ever to fail, but if it does, the process
200 will wait for ever, so we panic in this instance. (There was a case of this
201 when a bug in a function that calls milliwait() caused it to pass invalid data.
202 That's when I added the check. :-)
204 Argument: an itimerval structure containing the interval
209 milliwait(struct itimerval
*itval
)
212 sigset_t old_sigmask
;
213 (void)sigemptyset(&sigmask
); /* Empty mask */
214 (void)sigaddset(&sigmask
, SIGALRM
); /* Add SIGALRM */
215 (void)sigprocmask(SIG_BLOCK
, &sigmask
, &old_sigmask
); /* Block SIGALRM */
216 if (setitimer(ITIMER_REAL
, itval
, NULL
) < 0) /* Start timer */
217 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
218 "setitimer() failed: %s", strerror(errno
));
219 (void)sigfillset(&sigmask
); /* All signals */
220 (void)sigdelset(&sigmask
, SIGALRM
); /* Remove SIGALRM */
221 (void)sigsuspend(&sigmask
); /* Until SIGALRM */
222 (void)sigprocmask(SIG_SETMASK
, &old_sigmask
, NULL
); /* Restore mask */
228 /*************************************************
229 * Millisecond sleep function *
230 *************************************************/
232 /* The basic sleep() function has a granularity of 1 second, which is too rough
233 in some cases - for example, when using an increasing delay to slow down
236 Argument: number of millseconds
243 struct itimerval itval
;
244 itval
.it_interval
.tv_sec
= 0;
245 itval
.it_interval
.tv_usec
= 0;
246 itval
.it_value
.tv_sec
= msec
/1000;
247 itval
.it_value
.tv_usec
= (msec
% 1000) * 1000;
253 /*************************************************
254 * Compare microsecond times *
255 *************************************************/
262 Returns: -1, 0, or +1
266 exim_tvcmp(struct timeval
*t1
, struct timeval
*t2
)
268 if (t1
->tv_sec
> t2
->tv_sec
) return +1;
269 if (t1
->tv_sec
< t2
->tv_sec
) return -1;
270 if (t1
->tv_usec
> t2
->tv_usec
) return +1;
271 if (t1
->tv_usec
< t2
->tv_usec
) return -1;
278 /*************************************************
279 * Clock tick wait function *
280 *************************************************/
282 /* Exim uses a time + a pid to generate a unique identifier in two places: its
283 message IDs, and in file names for maildir deliveries. Because some OS now
284 re-use pids within the same second, sub-second times are now being used.
285 However, for absolute certaintly, we must ensure the clock has ticked before
286 allowing the relevant process to complete. At the time of implementation of
287 this code (February 2003), the speed of processors is such that the clock will
288 invariably have ticked already by the time a process has done its job. This
289 function prepares for the time when things are faster - and it also copes with
290 clocks that go backwards.
293 then_tv A timeval which was used to create uniqueness; its usec field
294 has been rounded down to the value of the resolution.
295 We want to be sure the current time is greater than this.
296 resolution The resolution that was used to divide the microseconds
297 (1 for maildir, larger for message ids)
303 exim_wait_tick(struct timeval
*then_tv
, int resolution
)
305 struct timeval now_tv
;
306 long int now_true_usec
;
308 (void)gettimeofday(&now_tv
, NULL
);
309 now_true_usec
= now_tv
.tv_usec
;
310 now_tv
.tv_usec
= (now_true_usec
/resolution
) * resolution
;
312 if (exim_tvcmp(&now_tv
, then_tv
) <= 0)
314 struct itimerval itval
;
315 itval
.it_interval
.tv_sec
= 0;
316 itval
.it_interval
.tv_usec
= 0;
317 itval
.it_value
.tv_sec
= then_tv
->tv_sec
- now_tv
.tv_sec
;
318 itval
.it_value
.tv_usec
= then_tv
->tv_usec
+ resolution
- now_true_usec
;
320 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
321 negative value for the microseconds is possible only in the case when "now"
322 is more than a second less than "then". That means that itval.it_value.tv_sec
323 is greater than zero. The following correction is therefore safe. */
325 if (itval
.it_value
.tv_usec
< 0)
327 itval
.it_value
.tv_usec
+= 1000000;
328 itval
.it_value
.tv_sec
-= 1;
331 DEBUG(D_transport
|D_receive
)
333 if (!running_in_test_harness
)
335 debug_printf("tick check: %lu.%06lu %lu.%06lu\n",
336 then_tv
->tv_sec
, then_tv
->tv_usec
, now_tv
.tv_sec
, now_tv
.tv_usec
);
337 debug_printf("waiting %lu.%06lu\n", itval
.it_value
.tv_sec
,
338 itval
.it_value
.tv_usec
);
349 /*************************************************
350 * Set up processing details *
351 *************************************************/
353 /* Save a text string for dumping when SIGUSR1 is received.
354 Do checks for overruns.
356 Arguments: format and arguments, as for printf()
361 set_process_info(char *format
, ...)
365 sprintf(CS process_info
, "%5d ", (int)getpid());
366 len
= Ustrlen(process_info
);
367 va_start(ap
, format
);
368 if (!string_vformat(process_info
+ len
, PROCESS_INFO_SIZE
- len
, format
, ap
))
369 Ustrcpy(process_info
+ len
, "**** string overflowed buffer ****");
370 DEBUG(D_process_info
) debug_printf("set_process_info: %s\n", process_info
);
378 /*************************************************
379 * Ensure stdin, stdout, and stderr exist *
380 *************************************************/
382 /* Some operating systems grumble if an exec() happens without a standard
383 input, output, and error (fds 0, 1, 2) being defined. The worry is that some
384 file will be opened and will use these fd values, and then some other bit of
385 code will assume, for example, that it can write error messages to stderr.
386 This function ensures that fds 0, 1, and 2 are open if they do not already
387 exist, by connecting them to /dev/null.
389 This function is also used to ensure that std{in,out,err} exist at all times,
390 so that if any library that Exim calls tries to use them, it doesn't crash.
402 for (i
= 0; i
<= 2; i
++)
404 if (fstat(i
, &statbuf
) < 0 && errno
== EBADF
)
406 if (devnull
< 0) devnull
= open("/dev/null", O_RDWR
);
407 if (devnull
< 0) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "%s",
408 string_open_failed(errno
, "/dev/null"));
409 if (devnull
!= i
) (void)dup2(devnull
, i
);
412 if (devnull
> 2) (void)close(devnull
);
418 /*************************************************
419 * Close unwanted file descriptors for delivery *
420 *************************************************/
422 /* This function is called from a new process that has been forked to deliver
423 an incoming message, either directly, or using exec.
425 We want any smtp input streams to be closed in this new process. However, it
426 has been observed that using fclose() here causes trouble. When reading in -bS
427 input, duplicate copies of messages have been seen. The files will be sharing a
428 file pointer with the parent process, and it seems that fclose() (at least on
429 some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
430 least sometimes. Hence we go for closing the underlying file descriptors.
432 If TLS is active, we want to shut down the TLS library, but without molesting
433 the parent's SSL connection.
435 For delivery of a non-SMTP message, we want to close stdin and stdout (and
436 stderr unless debugging) because the calling process might have set them up as
437 pipes and be waiting for them to close before it waits for the submission
438 process to terminate. If they aren't closed, they hold up the calling process
439 until the initial delivery process finishes, which is not what we want.
441 Exception: We do want it for synchronous delivery!
443 And notwithstanding all the above, if D_resolver is set, implying resolver
444 debugging, leave stdout open, because that's where the resolver writes its
447 When we close stderr (which implies we've also closed stdout), we also get rid
448 of any controlling terminal.
460 tls_close(FALSE
); /* Shut down the TLS library */
462 (void)close(fileno(smtp_in
));
463 (void)close(fileno(smtp_out
));
468 (void)close(0); /* stdin */
469 if ((debug_selector
& D_resolver
) == 0) (void)close(1); /* stdout */
470 if (debug_selector
== 0) /* stderr */
472 if (!synchronous_delivery
)
485 /*************************************************
487 *************************************************/
489 /* This function sets a new uid and gid permanently, optionally calling
490 initgroups() to set auxiliary groups. There are some special cases when running
491 Exim in unprivileged modes. In these situations the effective uid will not be
492 root; if we already have the right effective uid/gid, and don't need to
493 initialize any groups, leave things as they are.
498 igflag TRUE if initgroups() wanted
499 msg text to use in debugging output and failure log
501 Returns: nothing; bombs out on failure
505 exim_setugid(uid_t uid
, gid_t gid
, BOOL igflag
, uschar
*msg
)
507 uid_t euid
= geteuid();
508 gid_t egid
= getegid();
510 if (euid
== root_uid
|| euid
!= uid
|| egid
!= gid
|| igflag
)
512 /* At least one OS returns +1 for initgroups failure, so just check for
517 struct passwd
*pw
= getpwuid(uid
);
520 if (initgroups(pw
->pw_name
, gid
) != 0)
521 log_write(0,LOG_MAIN
|LOG_PANIC_DIE
,"initgroups failed for uid=%ld: %s",
522 (long int)uid
, strerror(errno
));
524 else log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "cannot run initgroups(): "
525 "no passwd entry for uid=%ld", (long int)uid
);
528 if (setgid(gid
) < 0 || setuid(uid
) < 0)
530 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "unable to set gid=%ld or uid=%ld "
531 "(euid=%ld): %s", (long int)gid
, (long int)uid
, (long int)euid
, msg
);
535 /* Debugging output included uid/gid and all groups */
540 gid_t group_list
[NGROUPS_MAX
];
541 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg
,
542 (long int)geteuid(), (long int)getegid(), (long int)getpid());
543 group_count
= getgroups(NGROUPS_MAX
, group_list
);
544 debug_printf(" auxiliary group list:");
548 for (i
= 0; i
< group_count
; i
++) debug_printf(" %d", (int)group_list
[i
]);
550 else debug_printf(" <none>");
558 /*************************************************
560 *************************************************/
562 /* Exim exits via this function so that it always clears up any open
568 Returns: does not return
576 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
577 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc
);
584 /*************************************************
585 * Extract port from host address *
586 *************************************************/
588 /* Called to extract the port from the values given to -oMa and -oMi.
589 It also checks the syntax of the address, and terminates it before the
590 port data when a port is extracted.
593 address the address, with possible port on the end
595 Returns: the port, or zero if there isn't one
596 bombs out on a syntax error
600 check_port(uschar
*address
)
602 int port
= host_address_extract_port(address
);
603 if (string_is_ip_address(address
, NULL
) == 0)
605 fprintf(stderr
, "exim abandoned: \"%s\" is not an IP address\n", address
);
613 /*************************************************
614 * Test/verify an address *
615 *************************************************/
617 /* This function is called by the -bv and -bt code. It extracts a working
618 address from a full RFC 822 address. This isn't really necessary per se, but it
619 has the effect of collapsing source routes.
623 flags flag bits for verify_address()
624 exit_value to be set for failures
630 test_address(uschar
*s
, int flags
, int *exit_value
)
632 int start
, end
, domain
;
633 uschar
*parse_error
= NULL
;
634 uschar
*address
= parse_extract_address(s
, &parse_error
, &start
, &end
, &domain
,
638 fprintf(stdout
, "syntax error: %s\n", parse_error
);
643 int rc
= verify_address(deliver_make_addr(address
,TRUE
), stdout
, flags
, -1,
644 -1, -1, NULL
, NULL
, NULL
);
645 if (rc
== FAIL
) *exit_value
= 2;
646 else if (rc
== DEFER
&& *exit_value
== 0) *exit_value
= 1;
652 /*************************************************
653 * Decode bit settings for log/debug *
654 *************************************************/
656 /* This function decodes a string containing bit settings in the form of +name
657 and/or -name sequences, and sets/unsets bits in a bit string accordingly. It
658 also recognizes a numeric setting of the form =<number>, but this is not
659 intended for user use. It's an easy way for Exim to pass the debug settings
660 when it is re-exec'ed.
662 The log options are held in two unsigned ints (because there became too many
663 for one). The top bit in the table means "put in 2nd selector". This does not
664 yet apply to debug options, so the "=" facility sets only the first selector.
666 The "all" selector, which must be equal to 0xffffffff, is recognized specially.
667 It sets all the bits in both selectors. However, there is a facility for then
668 unsetting certain bits, because we want to turn off "memory" in the debug case.
670 A bad value for a debug setting is treated as an unknown option - error message
671 to stderr and die. For log settings, which come from the configuration file,
672 we write to the log on the way out...
675 selector1 address of the first bit string
676 selector2 address of the second bit string, or NULL
677 notall1 bits to exclude from "all" for selector1
678 notall2 bits to exclude from "all" for selector2
679 string the configured string
680 options the table of option names
682 which "log" or "debug"
684 Returns: nothing on success - bomb out on failure
688 decode_bits(unsigned int *selector1
, unsigned int *selector2
, int notall1
,
689 int notall2
, uschar
*string
, bit_table
*options
, int count
, uschar
*which
)
692 if (string
== NULL
) return;
696 char *end
; /* Not uschar */
697 *selector1
= strtoul(CS string
+1, &end
, 0);
698 if (*end
== 0) return;
699 errmsg
= string_sprintf("malformed numeric %s_selector setting: %s", which
,
704 /* Handle symbolic setting */
711 bit_table
*start
, *end
;
713 while (isspace(*string
)) string
++;
714 if (*string
== 0) return;
716 if (*string
!= '+' && *string
!= '-')
718 errmsg
= string_sprintf("malformed %s_selector setting: "
719 "+ or - expected but found \"%s\"", which
, string
);
723 adding
= *string
++ == '+';
725 while (isalnum(*string
) || *string
== '_') string
++;
729 end
= options
+ count
;
733 bit_table
*middle
= start
+ (end
- start
)/2;
734 int c
= Ustrncmp(s
, middle
->name
, len
);
737 if (middle
->name
[len
] != 0) c
= -1; else
739 unsigned int bit
= middle
->bit
;
740 unsigned int *selector
;
742 /* The value with all bits set means "force all bits in both selectors"
743 in the case where two are being handled. However, the top bit in the
744 second selector is never set. When setting, some bits can be excluded.
747 if (bit
== 0xffffffff)
751 *selector1
= 0xffffffff ^ notall1
;
752 if (selector2
!= NULL
) *selector2
= 0x7fffffff ^ notall2
;
757 if (selector2
!= NULL
) *selector2
= 0;
761 /* Otherwise, the 0x80000000 bit means "this value, without the top
762 bit, belongs in the second selector". */
766 if ((bit
& 0x80000000) != 0)
768 selector
= selector2
;
771 else selector
= selector1
;
772 if (adding
) *selector
|= bit
; else *selector
&= ~bit
;
774 break; /* Out of loop to match selector name */
777 if (c
< 0) end
= middle
; else start
= middle
+ 1;
778 } /* Loop to match selector name */
782 errmsg
= string_sprintf("unknown %s_selector setting: %c%.*s", which
,
783 adding
? '+' : '-', len
, s
);
786 } /* Loop for selector names */
788 /* Handle disasters */
791 if (Ustrcmp(which
, "debug") == 0)
793 fprintf(stderr
, "exim: %s\n", errmsg
);
796 else log_write(0, LOG_CONFIG
|LOG_PANIC_DIE
, "%s", errmsg
);
801 /*************************************************
802 * Show supported features *
803 *************************************************/
805 /* This function is called for -bV and for -d to output the optional features
806 of the current Exim binary.
808 Arguments: a FILE for printing
813 show_whats_supported(FILE *f
)
815 #ifdef DB_VERSION_STRING
816 fprintf(f
, "Berkeley DB: %s\n", DB_VERSION_STRING
);
817 #elif defined(BTREEVERSION) && defined(HASHVERSION)
819 fprintf(f
, "Probably Berkeley DB version 1.8x (native mode)\n");
821 fprintf(f
, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
823 #elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
824 fprintf(f
, "Probably ndbm\n");
825 #elif defined(USE_TDB)
826 fprintf(f
, "Using tdb\n");
829 fprintf(f
, "Probably GDBM (native mode)\n");
831 fprintf(f
, "Probably GDBM (compatibility mode)\n");
835 fprintf(f
, "Support for:");
836 #ifdef SUPPORT_CRYPTEQ
837 fprintf(f
, " crypteq");
840 fprintf(f
, " iconv()");
852 fprintf(f
, " Expand_dlfunc");
854 #ifdef USE_TCP_WRAPPERS
855 fprintf(f
, " TCPwrappers");
859 fprintf(f
, " GnuTLS");
861 fprintf(f
, " OpenSSL");
864 #ifdef WITH_CONTENT_SCAN
865 fprintf(f
, " Content_Scanning");
867 #ifdef WITH_OLD_DEMIME
868 fprintf(f
, " Old_Demime");
870 #ifdef EXPERIMENTAL_SPF
871 fprintf(f
, " Experimental_SPF");
873 #ifdef EXPERIMENTAL_SRS
874 fprintf(f
, " Experimental_SRS");
876 #ifdef EXPERIMENTAL_BRIGHTMAIL
877 fprintf(f
, " Experimental_Brightmail");
879 #ifdef EXPERIMENTAL_DOMAINKEYS
880 fprintf(f
, " Experimental_DomainKeys");
884 fprintf(f
, "Lookups:");
885 #ifdef LOOKUP_LSEARCH
886 fprintf(f
, " lsearch wildlsearch nwildlsearch iplsearch");
892 fprintf(f
, " dbm dbmnz");
895 fprintf(f
, " dnsdb");
897 #ifdef LOOKUP_DSEARCH
898 fprintf(f
, " dsearch");
901 fprintf(f
, " ibase");
904 fprintf(f
, " ldap ldapdn ldapm");
907 fprintf(f
, " mysql");
910 fprintf(f
, " nis nis0");
912 #ifdef LOOKUP_NISPLUS
913 fprintf(f
, " nisplus");
916 fprintf(f
, " oracle");
919 fprintf(f
, " passwd");
922 fprintf(f
, " pgsql");
925 fprintf(f
, " sqlite");
928 fprintf(f
, " testdb");
931 fprintf(f
, " whoson");
935 fprintf(f
, "Authenticators:");
937 fprintf(f
, " cram_md5");
939 #ifdef AUTH_CYRUS_SASL
940 fprintf(f
, " cyrus_sasl");
942 #ifdef AUTH_PLAINTEXT
943 fprintf(f
, " plaintext");
950 fprintf(f
, "Routers:");
952 fprintf(f
, " accept");
954 #ifdef ROUTER_DNSLOOKUP
955 fprintf(f
, " dnslookup");
957 #ifdef ROUTER_IPLITERAL
958 fprintf(f
, " ipliteral");
960 #ifdef ROUTER_IPLOOKUP
961 fprintf(f
, " iplookup");
963 #ifdef ROUTER_MANUALROUTE
964 fprintf(f
, " manualroute");
966 #ifdef ROUTER_QUERYPROGRAM
967 fprintf(f
, " queryprogram");
969 #ifdef ROUTER_REDIRECT
970 fprintf(f
, " redirect");
974 fprintf(f
, "Transports:");
975 #ifdef TRANSPORT_APPENDFILE
976 fprintf(f
, " appendfile");
977 #ifdef SUPPORT_MAILDIR
978 fprintf(f
, "/maildir");
980 #ifdef SUPPORT_MAILSTORE
981 fprintf(f
, "/mailstore");
987 #ifdef TRANSPORT_AUTOREPLY
988 fprintf(f
, " autoreply");
990 #ifdef TRANSPORT_LMTP
993 #ifdef TRANSPORT_PIPE
996 #ifdef TRANSPORT_SMTP
1001 if (fixed_never_users
[0] > 0)
1004 fprintf(f
, "Fixed never_users: ");
1005 for (i
= 1; i
<= (int)fixed_never_users
[0] - 1; i
++)
1006 fprintf(f
, "%d:", (unsigned int)fixed_never_users
[i
]);
1007 fprintf(f
, "%d\n", (unsigned int)fixed_never_users
[i
]);
1014 /*************************************************
1015 * Quote a local part *
1016 *************************************************/
1018 /* This function is used when a sender address or a From: or Sender: header
1019 line is being created from the caller's login, or from an authenticated_id. It
1020 applies appropriate quoting rules for a local part.
1022 Argument: the local part
1023 Returns: the local part, quoted if necessary
1027 local_part_quote(uschar
*lpart
)
1029 BOOL needs_quote
= FALSE
;
1034 for (t
= lpart
; !needs_quote
&& *t
!= 0; t
++)
1036 needs_quote
= !isalnum(*t
) && strchr("!#$%&'*+-/=?^_`{|}~", *t
) == NULL
&&
1037 (*t
!= '.' || t
== lpart
|| t
[1] == 0);
1040 if (!needs_quote
) return lpart
;
1043 yield
= string_cat(NULL
, &size
, &ptr
, US
"\"", 1);
1047 uschar
*nq
= US
Ustrpbrk(lpart
, "\\\"");
1050 yield
= string_cat(yield
, &size
, &ptr
, lpart
, Ustrlen(lpart
));
1053 yield
= string_cat(yield
, &size
, &ptr
, lpart
, nq
- lpart
);
1054 yield
= string_cat(yield
, &size
, &ptr
, US
"\\", 1);
1055 yield
= string_cat(yield
, &size
, &ptr
, nq
, 1);
1059 yield
= string_cat(yield
, &size
, &ptr
, US
"\"", 1);
1067 /*************************************************
1068 * Load readline() functions *
1069 *************************************************/
1071 /* This function is called from testing executions that read data from stdin,
1072 but only when running as the calling user. Currently, only -be does this. The
1073 function loads the readline() function library and passes back the functions.
1074 On some systems, it needs the curses library, so load that too, but try without
1075 it if loading fails. All this functionality has to be requested at build time.
1078 fn_readline_ptr pointer to where to put the readline pointer
1079 fn_addhist_ptr pointer to where to put the addhistory function
1081 Returns: the dlopen handle or NULL on failure
1085 set_readline(char * (**fn_readline_ptr
)(char *),
1086 char * (**fn_addhist_ptr
)(char *))
1089 void *dlhandle_curses
= dlopen("libcurses.so", RTLD_GLOBAL
|RTLD_LAZY
);
1091 dlhandle
= dlopen("libreadline.so", RTLD_GLOBAL
|RTLD_NOW
);
1092 if (dlhandle_curses
!= NULL
) dlclose(dlhandle_curses
);
1094 if (dlhandle
!= NULL
)
1096 *fn_readline_ptr
= (char *(*)(char*))dlsym(dlhandle
, "readline");
1097 *fn_addhist_ptr
= (char *(*)(char*))dlsym(dlhandle
, "add_history");
1101 DEBUG(D_any
) debug_printf("failed to load readline: %s\n", dlerror());
1110 /*************************************************
1111 * Get a line from stdin for testing things *
1112 *************************************************/
1114 /* This function is called when running tests that can take a number of lines
1115 of input (for example, -be and -bt). It handles continuations and trailing
1116 spaces. And prompting and a blank line output on eof. If readline() is in use,
1117 the arguments are non-NULL and provide the relevant functions.
1120 fn_readline readline function or NULL
1121 fn_addhist addhist function or NULL
1123 Returns: pointer to dynamic memory, or NULL at end of file
1127 get_stdinput(char *(*fn_readline
)(char *), char *(*fn_addhist
)(char *))
1132 uschar
*yield
= NULL
;
1134 if (fn_readline
== NULL
) printf("> ");
1138 uschar buffer
[1024];
1142 char *readline_line
= NULL
;
1143 if (fn_readline
!= NULL
)
1145 if ((readline_line
= fn_readline((i
> 0)? "":"> ")) == NULL
) break;
1146 if (*readline_line
!= 0 && fn_addhist
!= NULL
) fn_addhist(readline_line
);
1147 p
= US readline_line
;
1152 /* readline() not in use */
1155 if (Ufgets(buffer
, sizeof(buffer
), stdin
) == NULL
) break;
1159 /* Handle the line */
1161 ss
= p
+ (int)Ustrlen(p
);
1162 while (ss
> p
&& isspace(ss
[-1])) ss
--;
1166 while (p
< ss
&& isspace(*p
)) p
++; /* leading space after cont */
1169 yield
= string_cat(yield
, &size
, &ptr
, p
, ss
- p
);
1172 if (fn_readline
!= NULL
) free(readline_line
);
1175 if (ss
== p
|| yield
[ptr
-1] != '\\')
1183 if (yield
== NULL
) printf("\n");
1189 /*************************************************
1190 * Entry point and high-level code *
1191 *************************************************/
1193 /* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1194 the appropriate action. All the necessary functions are present in the one
1195 binary. I originally thought one should split it up, but it turns out that so
1196 much of the apparatus is needed in each chunk that one might as well just have
1197 it all available all the time, which then makes the coding easier as well.
1200 argc count of entries in argv
1201 argv argument strings, with argv[0] being the program name
1203 Returns: EXIT_SUCCESS if terminated successfully
1204 EXIT_FAILURE otherwise, except when a message has been sent
1205 to the sender, and -oee was given
1209 main(int argc
, char **cargv
)
1211 uschar
**argv
= USS cargv
;
1212 int arg_receive_timeout
= -1;
1213 int arg_smtp_receive_timeout
= -1;
1214 int arg_error_handling
= error_handling
;
1215 int filter_sfd
= -1;
1216 int filter_ufd
= -1;
1219 int list_queue_option
= 0;
1221 int msg_action_arg
= -1;
1222 int namelen
= (argv
[0] == NULL
)? 0 : Ustrlen(argv
[0]);
1223 int queue_only_reason
= 0;
1225 int perl_start_option
= 0;
1227 int recipients_arg
= argc
;
1228 int sender_address_domain
= 0;
1229 int test_retry_arg
= -1;
1230 int test_rewrite_arg
= -1;
1231 BOOL arg_queue_only
= FALSE
;
1232 BOOL bi_option
= FALSE
;
1233 BOOL checking
= FALSE
;
1234 BOOL count_queue
= FALSE
;
1235 BOOL expansion_test
= FALSE
;
1236 BOOL extract_recipients
= FALSE
;
1237 BOOL forced_delivery
= FALSE
;
1238 BOOL f_end_dot
= FALSE
;
1239 BOOL deliver_give_up
= FALSE
;
1240 BOOL list_queue
= FALSE
;
1241 BOOL list_options
= FALSE
;
1242 BOOL local_queue_only
;
1244 BOOL one_msg_action
= FALSE
;
1245 BOOL queue_only_set
= FALSE
;
1246 BOOL receiving_message
= TRUE
;
1248 BOOL removed_privilege
= FALSE
;
1249 BOOL verify_address_mode
= FALSE
;
1250 BOOL verify_as_sender
= FALSE
;
1251 BOOL version_printed
= FALSE
;
1252 uschar
*alias_arg
= NULL
;
1253 uschar
*called_as
= US
"";
1254 uschar
*start_queue_run_id
= NULL
;
1255 uschar
*stop_queue_run_id
= NULL
;
1256 uschar
*ftest_domain
= NULL
;
1257 uschar
*ftest_localpart
= NULL
;
1258 uschar
*ftest_prefix
= NULL
;
1259 uschar
*ftest_suffix
= NULL
;
1260 uschar
*real_sender_address
;
1261 uschar
*originator_home
= US
"/";
1265 struct stat statbuf
;
1266 pid_t passed_qr_pid
= (pid_t
)0;
1267 int passed_qr_pipe
= -1;
1268 gid_t group_list
[NGROUPS_MAX
];
1270 /* Possible options for -R and -S */
1272 static uschar
*rsopts
[] = { US
"f", US
"ff", US
"r", US
"rf", US
"rff" };
1274 /* Need to define this in case we need to change the environment in order
1275 to get rid of a bogus time zone. We have to make it char rather than uschar
1276 because some OS define it in /usr/include/unistd.h. */
1278 extern char **environ
;
1280 /* If the Exim user and/or group and/or the configuration file owner/group were
1281 defined by ref:name at build time, we must now find the actual uid/gid values.
1282 This is a feature to make the lives of binary distributors easier. */
1284 #ifdef EXIM_USERNAME
1285 if (route_finduser(US EXIM_USERNAME
, &pw
, &exim_uid
))
1287 exim_gid
= pw
->pw_gid
;
1291 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1297 #ifdef EXIM_GROUPNAME
1298 if (!route_findgroup(US EXIM_GROUPNAME
, &exim_gid
))
1300 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1306 #ifdef CONFIGURE_OWNERNAME
1307 if (!route_finduser(US CONFIGURE_OWNERNAME
, NULL
, &config_uid
))
1309 fprintf(stderr
, "exim: failed to find uid for user name \"%s\"\n",
1310 CONFIGURE_OWNERNAME
);
1315 #ifdef CONFIGURE_GROUPNAME
1316 if (!route_findgroup(US CONFIGURE_GROUPNAME
, &config_gid
))
1318 fprintf(stderr
, "exim: failed to find gid for group name \"%s\"\n",
1319 CONFIGURE_GROUPNAME
);
1324 /* In the Cygwin environment, some initialization needs doing. It is fudged
1325 in by means of this macro. */
1331 /* Check a field which is patched when we are running Exim within its
1332 testing harness; do a fast initial check, and then the whole thing. */
1334 running_in_test_harness
=
1335 *running_status
== '<' && Ustrcmp(running_status
, "<<<testing>>>") == 0;
1337 /* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1338 at the start of a program; however, it seems that some environments do not
1339 follow this. A "strange" locale can affect the formatting of timestamps, so we
1342 setlocale(LC_ALL
, "C");
1344 /* Set up the default handler for timing using alarm(). */
1346 os_non_restarting_signal(SIGALRM
, sigalrm_handler
);
1348 /* Ensure we have a buffer for constructing log entries. Use malloc directly,
1349 because store_malloc writes a log entry on failure. */
1351 log_buffer
= (uschar
*)malloc(LOG_BUFFER_SIZE
);
1352 if (log_buffer
== NULL
)
1354 fprintf(stderr
, "exim: failed to get store for log buffer\n");
1358 /* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1359 NULL when the daemon is run and the file is closed. We have to use this
1360 indirection, because some systems don't allow writing to the variable "stderr".
1363 if (fstat(fileno(stderr
), &statbuf
) >= 0) log_stderr
= stderr
;
1365 /* Arrange for the PCRE regex library to use our store functions. Note that
1366 the normal calls are actually macros that add additional arguments for
1367 debugging purposes so we have to assign specially constructed functions here.
1368 The default is to use store in the stacking pool, but this is overridden in the
1369 regex_must_compile() function. */
1371 pcre_malloc
= function_store_get
;
1372 pcre_free
= function_dummy_free
;
1374 /* Ensure there is a big buffer for temporary use in several places. It is put
1375 in malloc store so that it can be freed for enlargement if necessary. */
1377 big_buffer
= store_malloc(big_buffer_size
);
1379 /* Set up the handler for the data request signal, and set the initial
1380 descriptive text. */
1382 set_process_info("initializing");
1383 os_restarting_signal(SIGUSR1
, usr1_handler
);
1385 /* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1386 in the daemon code. For the rest of Exim's uses, we ignore it. */
1388 signal(SIGHUP
, SIG_IGN
);
1390 /* We don't want to die on pipe errors as the code is written to handle
1391 the write error instead. */
1393 signal(SIGPIPE
, SIG_IGN
);
1395 /* Under some circumstance on some OS, Exim can get called with SIGCHLD
1396 set to SIG_IGN. This causes subprocesses that complete before the parent
1397 process waits for them not to hang around, so when Exim calls wait(), nothing
1398 is there. The wait() code has been made robust against this, but let's ensure
1399 that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1400 ending status. We use sigaction rather than plain signal() on those OS where
1401 SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1402 problem on AIX with this.) */
1406 struct sigaction act
;
1407 act
.sa_handler
= SIG_DFL
;
1408 sigemptyset(&(act
.sa_mask
));
1410 sigaction(SIGCHLD
, &act
, NULL
);
1413 signal(SIGCHLD
, SIG_DFL
);
1416 /* Save the arguments for use if we re-exec exim as a daemon after receiving
1421 /* Set up the version number. Set up the leading 'E' for the external form of
1422 message ids, set the pointer to the internal form, and initialize it to
1423 indicate no message being processed. */
1426 message_id_option
[0] = '-';
1427 message_id_external
= message_id_option
+ 1;
1428 message_id_external
[0] = 'E';
1429 message_id
= message_id_external
+ 1;
1432 /* Set the umask to zero so that any files that Exim creates are created
1433 with the modes that it specifies. */
1437 /* Precompile the regular expression for matching a message id. Keep this in
1438 step with the code that generates ids in the accept.c module. We need to do
1439 this here, because the -M options check their arguments for syntactic validity
1440 using mac_ismsgid, which uses this. */
1443 regex_must_compile(US
"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE
, TRUE
);
1445 /* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1446 this seems to be a generally accepted convention, since one finds symbolic
1447 links called "mailq" in standard OS configurations. */
1449 if ((namelen
== 5 && Ustrcmp(argv
[0], "mailq") == 0) ||
1450 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/mailq", 6) == 0))
1453 receiving_message
= FALSE
;
1454 called_as
= US
"-mailq";
1457 /* If the program is called as "rmail" treat it as equivalent to
1458 "exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1459 i.e. preventing a single dot on a line from terminating the message, and
1460 returning with zero return code, even in cases of error (provided an error
1461 message has been sent). */
1463 if ((namelen
== 5 && Ustrcmp(argv
[0], "rmail") == 0) ||
1464 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rmail", 6) == 0))
1467 called_as
= US
"-rmail";
1468 errors_sender_rc
= EXIT_SUCCESS
;
1471 /* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1472 this is a smail convention. */
1474 if ((namelen
== 5 && Ustrcmp(argv
[0], "rsmtp") == 0) ||
1475 (namelen
> 5 && Ustrncmp(argv
[0] + namelen
- 6, "/rsmtp", 6) == 0))
1477 smtp_input
= smtp_batched_input
= TRUE
;
1478 called_as
= US
"-rsmtp";
1481 /* If the program is called as "runq" treat it as equivalent to "exim -q";
1482 this is a smail convention. */
1484 if ((namelen
== 4 && Ustrcmp(argv
[0], "runq") == 0) ||
1485 (namelen
> 4 && Ustrncmp(argv
[0] + namelen
- 5, "/runq", 5) == 0))
1488 receiving_message
= FALSE
;
1489 called_as
= US
"-runq";
1492 /* If the program is called as "newaliases" treat it as equivalent to
1493 "exim -bi"; this is a sendmail convention. */
1495 if ((namelen
== 10 && Ustrcmp(argv
[0], "newaliases") == 0) ||
1496 (namelen
> 10 && Ustrncmp(argv
[0] + namelen
- 11, "/newaliases", 11) == 0))
1499 receiving_message
= FALSE
;
1500 called_as
= US
"-newaliases";
1503 /* Save the original effective uid for a couple of uses later. It should
1504 normally be root, but in some esoteric environments it may not be. */
1506 original_euid
= geteuid();
1508 /* Get the real uid and gid. If the caller is root, force the effective uid/gid
1509 to be the same as the real ones. This makes a difference only if Exim is setuid
1510 (or setgid) to something other than root, which could be the case in some
1511 special configurations. */
1513 real_uid
= getuid();
1514 real_gid
= getgid();
1516 if (real_uid
== root_uid
)
1522 /* If neither the original real uid nor the original euid was root, Exim is
1523 running in an unprivileged state. */
1525 unprivileged
= (real_uid
!= root_uid
&& original_euid
!= root_uid
);
1527 /* If the first argument is --help, pretend there are no arguments. This will
1528 cause a brief message to be given. */
1530 if (argc
> 1 && Ustrcmp(argv
[1], "--help") == 0) argc
= 1;
1532 /* Scan the program's arguments. Some can be dealt with right away; others are
1533 simply recorded for checking and handling afterwards. Do a high-level switch
1534 on the second character (the one after '-'), to save some effort. */
1536 for (i
= 1; i
< argc
; i
++)
1538 BOOL badarg
= FALSE
;
1539 uschar
*arg
= argv
[i
];
1543 /* An argument not starting with '-' is the start of a recipients list;
1544 break out of the options-scanning loop. */
1552 /* An option consistion of -- terminates the options */
1554 if (Ustrcmp(arg
, "--") == 0)
1556 recipients_arg
= i
+ 1;
1560 /* Handle flagged options */
1562 switchchar
= arg
[1];
1565 /* Make all -ex options synonymous with -oex arguments, since that
1566 is assumed by various callers. Also make -qR options synonymous with -R
1567 options, as that seems to be required as well. Allow for -qqR too, and
1568 the same for -S options. */
1570 if (Ustrncmp(arg
+1, "oe", 2) == 0 ||
1571 Ustrncmp(arg
+1, "qR", 2) == 0 ||
1572 Ustrncmp(arg
+1, "qS", 2) == 0)
1574 switchchar
= arg
[2];
1577 else if (Ustrncmp(arg
+1, "qqR", 3) == 0 || Ustrncmp(arg
+1, "qqS", 3) == 0)
1579 switchchar
= arg
[3];
1581 queue_2stage
= TRUE
;
1584 /* Make -r synonymous with -f, since it is a documented alias */
1586 else if (arg
[1] == 'r') switchchar
= 'f';
1588 /* Make -ov synonymous with -v */
1590 else if (Ustrcmp(arg
, "-ov") == 0)
1596 /* High-level switch on active initial letter */
1600 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1601 so has no need of it. */
1604 if (*argrest
== 0) i
++; /* Skip over the type */
1609 receiving_message
= FALSE
; /* Reset TRUE for -bm, -bS, -bs below */
1611 /* -bd: Run in daemon mode, awaiting SMTP connections.
1612 -bdf: Ditto, but in the foreground.
1615 if (*argrest
== 'd')
1617 daemon_listen
= TRUE
;
1618 if (*(++argrest
) == 'f') background_daemon
= FALSE
;
1619 else if (*argrest
!= 0) { badarg
= TRUE
; break; }
1622 /* -be: Run in expansion test mode */
1624 else if (*argrest
== 'e')
1625 expansion_test
= checking
= TRUE
;
1627 /* -bF: Run system filter test */
1629 else if (*argrest
== 'F')
1631 filter_test
|= FTEST_SYSTEM
;
1632 if (*(++argrest
) != 0) { badarg
= TRUE
; break; }
1633 if (++i
< argc
) filter_test_sfile
= argv
[i
]; else
1635 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
1640 /* -bf: Run user filter test
1641 -bfd: Set domain for filter testing
1642 -bfl: Set local part for filter testing
1643 -bfp: Set prefix for filter testing
1644 -bfs: Set suffix for filter testing
1647 else if (*argrest
== 'f')
1649 if (*(++argrest
) == 0)
1651 filter_test
|= FTEST_USER
;
1652 if (++i
< argc
) filter_test_ufile
= argv
[i
]; else
1654 fprintf(stderr
, "exim: file name expected after %s\n", argv
[i
-1]);
1662 fprintf(stderr
, "exim: string expected after %s\n", arg
);
1665 if (Ustrcmp(argrest
, "d") == 0) ftest_domain
= argv
[i
];
1666 else if (Ustrcmp(argrest
, "l") == 0) ftest_localpart
= argv
[i
];
1667 else if (Ustrcmp(argrest
, "p") == 0) ftest_prefix
= argv
[i
];
1668 else if (Ustrcmp(argrest
, "s") == 0) ftest_suffix
= argv
[i
];
1669 else { badarg
= TRUE
; break; }
1673 /* -bh: Host checking - an IP address must follow. */
1675 else if (Ustrcmp(argrest
, "h") == 0 || Ustrcmp(argrest
, "hc") == 0)
1677 if (++i
>= argc
) { badarg
= TRUE
; break; }
1678 sender_host_address
= argv
[i
];
1679 host_checking
= checking
= log_testing_mode
= TRUE
;
1680 host_checking_callout
= argrest
[1] == 'c';
1683 /* -bi: This option is used by sendmail to initialize *the* alias file,
1684 though it has the -oA option to specify a different file. Exim has no
1685 concept of *the* alias file, but since Sun's YP make script calls
1686 sendmail this way, some support must be provided. */
1688 else if (Ustrcmp(argrest
, "i") == 0) bi_option
= TRUE
;
1690 /* -bm: Accept and deliver message - the default option. Reinstate
1691 receiving_message, which got turned off for all -b options. */
1693 else if (Ustrcmp(argrest
, "m") == 0) receiving_message
= TRUE
;
1695 /* -bnq: For locally originating messages, do not qualify unqualified
1696 addresses. In the envelope, this causes errors; in header lines they
1699 else if (Ustrcmp(argrest
, "nq") == 0)
1701 allow_unqualified_sender
= FALSE
;
1702 allow_unqualified_recipient
= FALSE
;
1705 /* -bpxx: List the contents of the mail queue, in various forms. If
1706 the option is -bpc, just a queue count is needed. Otherwise, if the
1707 first letter after p is r, then order is random. */
1709 else if (*argrest
== 'p')
1711 if (*(++argrest
) == 'c')
1714 if (*(++argrest
) != 0) badarg
= TRUE
;
1718 if (*argrest
== 'r')
1720 list_queue_option
= 8;
1723 else list_queue_option
= 0;
1727 /* -bp: List the contents of the mail queue, top-level only */
1729 if (*argrest
== 0) {}
1731 /* -bpu: List the contents of the mail queue, top-level undelivered */
1733 else if (Ustrcmp(argrest
, "u") == 0) list_queue_option
+= 1;
1735 /* -bpa: List the contents of the mail queue, including all delivered */
1737 else if (Ustrcmp(argrest
, "a") == 0) list_queue_option
+= 2;
1739 /* Unknown after -bp[r] */
1749 /* -bP: List the configuration variables given as the address list.
1750 Force -v, so configuration errors get displayed. */
1752 else if (Ustrcmp(argrest
, "P") == 0)
1754 list_options
= TRUE
;
1755 debug_selector
|= D_v
;
1756 debug_file
= stderr
;
1759 /* -brt: Test retry configuration lookup */
1761 else if (Ustrcmp(argrest
, "rt") == 0)
1763 test_retry_arg
= i
+ 1;
1767 /* -brw: Test rewrite configuration */
1769 else if (Ustrcmp(argrest
, "rw") == 0)
1771 test_rewrite_arg
= i
+ 1;
1775 /* -bS: Read SMTP commands on standard input, but produce no replies -
1776 all errors are reported by sending messages. */
1778 else if (Ustrcmp(argrest
, "S") == 0)
1779 smtp_input
= smtp_batched_input
= receiving_message
= TRUE
;
1781 /* -bs: Read SMTP commands on standard input and produce SMTP replies
1782 on standard output. */
1784 else if (Ustrcmp(argrest
, "s") == 0) smtp_input
= receiving_message
= TRUE
;
1786 /* -bt: address testing mode */
1788 else if (Ustrcmp(argrest
, "t") == 0)
1789 address_test_mode
= checking
= log_testing_mode
= TRUE
;
1791 /* -bv: verify addresses */
1793 else if (Ustrcmp(argrest
, "v") == 0)
1794 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
1796 /* -bvs: verify sender addresses */
1798 else if (Ustrcmp(argrest
, "vs") == 0)
1800 verify_address_mode
= checking
= log_testing_mode
= TRUE
;
1801 verify_as_sender
= TRUE
;
1804 /* -bV: Print version string and support details */
1806 else if (Ustrcmp(argrest
, "V") == 0)
1808 printf("Exim version %s #%s built %s\n", version_string
,
1809 version_cnumber
, version_date
);
1810 printf("%s\n", CS version_copyright
);
1811 version_printed
= TRUE
;
1812 show_whats_supported(stdout
);
1819 /* -C: change configuration file list; ignore if it isn't really
1820 a change! Enforce a prefix check if required. */
1825 if(++i
< argc
) argrest
= argv
[i
]; else
1826 { badarg
= TRUE
; break; }
1828 if (Ustrcmp(config_main_filelist
, argrest
) != 0)
1830 #ifdef ALT_CONFIG_PREFIX
1832 int len
= Ustrlen(ALT_CONFIG_PREFIX
);
1833 uschar
*list
= argrest
;
1835 while((filename
= string_nextinlist(&list
, &sep
, big_buffer
,
1836 big_buffer_size
)) != NULL
)
1838 if ((Ustrlen(filename
) < len
||
1839 Ustrncmp(filename
, ALT_CONFIG_PREFIX
, len
) != 0 ||
1840 Ustrstr(filename
, "/../") != NULL
) &&
1841 (Ustrcmp(filename
, "/dev/null") != 0 || real_uid
!= root_uid
))
1843 fprintf(stderr
, "-C Permission denied\n");
1849 config_main_filelist
= argrest
;
1850 config_changed
= TRUE
;
1855 /* -D: set up a macro definition */
1858 #ifdef DISABLE_D_OPTION
1859 fprintf(stderr
, "exim: -D is not available in this Exim binary\n");
1864 macro_item
*mlast
= NULL
;
1867 uschar
*s
= argrest
;
1869 while (isspace(*s
)) s
++;
1871 if (*s
< 'A' || *s
> 'Z')
1873 fprintf(stderr
, "exim: macro name set by -D must start with "
1874 "an upper case letter\n");
1878 while (isalnum(*s
) || *s
== '_')
1880 if (ptr
< sizeof(name
)-1) name
[ptr
++] = *s
;
1884 if (ptr
== 0) { badarg
= TRUE
; break; }
1885 while (isspace(*s
)) s
++;
1888 if (*s
++ != '=') { badarg
= TRUE
; break; }
1889 while (isspace(*s
)) s
++;
1892 for (m
= macros
; m
!= NULL
; m
= m
->next
)
1894 if (Ustrcmp(m
->name
, name
) == 0)
1896 fprintf(stderr
, "exim: duplicated -D in command line\n");
1902 m
= store_get(sizeof(macro_item
) + Ustrlen(name
));
1904 m
->command_line
= TRUE
;
1905 if (mlast
== NULL
) macros
= m
; else mlast
->next
= m
;
1906 Ustrcpy(m
->name
, name
);
1907 m
->replacement
= string_copy(s
);
1909 if (clmacro_count
>= MAX_CLMACROS
)
1911 fprintf(stderr
, "exim: too many -D options on command line\n");
1914 clmacros
[clmacro_count
++] = string_sprintf("-D%s=%s", m
->name
,
1920 /* -d: Set debug level (see also -v below) or set the drop_cr option.
1921 The latter is now a no-op, retained for compatibility only. If -dd is used,
1922 debugging subprocesses of the daemon is disabled. */
1925 if (Ustrcmp(argrest
, "ropcr") == 0)
1927 /* drop_cr = TRUE; */
1930 /* Use an intermediate variable so that we don't set debugging while
1931 decoding the debugging bits. */
1935 unsigned int selector
= D_default
;
1938 if (*argrest
== 'd')
1940 debug_daemon
= TRUE
;
1944 decode_bits(&selector
, NULL
, D_memory
, 0, argrest
, debug_options
,
1945 debug_options_count
, US
"debug");
1946 debug_selector
= selector
;
1951 /* -E: This is a local error message. This option is not intended for
1952 external use at all, but is not restricted to trusted callers because it
1953 does no harm (just suppresses certain error messages) and if Exim is run
1954 not setuid root it won't always be trusted when it generates error
1955 messages using this option. If there is a message id following -E, point
1956 message_reference at it, for logging. */
1959 local_error_message
= TRUE
;
1960 if (mac_ismsgid(argrest
)) message_reference
= argrest
;
1964 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
1965 option, so it looks as if historically the -oex options are also callable
1966 without the leading -o. So we have to accept them. Before the switch,
1967 anything starting -oe has been converted to -e. Exim does not support all
1968 of the sendmail error options. */
1971 if (Ustrcmp(argrest
, "e") == 0)
1973 arg_error_handling
= ERRORS_SENDER
;
1974 errors_sender_rc
= EXIT_SUCCESS
;
1976 else if (Ustrcmp(argrest
, "m") == 0) arg_error_handling
= ERRORS_SENDER
;
1977 else if (Ustrcmp(argrest
, "p") == 0) arg_error_handling
= ERRORS_STDERR
;
1978 else if (Ustrcmp(argrest
, "q") == 0) arg_error_handling
= ERRORS_STDERR
;
1979 else if (Ustrcmp(argrest
, "w") == 0) arg_error_handling
= ERRORS_SENDER
;
1984 /* -F: Set sender's full name, used instead of the gecos entry from
1985 the password file. Since users can usually alter their gecos entries,
1986 there's no security involved in using this instead. The data can follow
1987 the -F or be in the next argument. */
1992 if(++i
< argc
) argrest
= argv
[i
]; else
1993 { badarg
= TRUE
; break; }
1995 originator_name
= argrest
;
1999 /* -f: Set sender's address - this value is only actually used if Exim is
2000 run by a trusted user, or if untrusted_set_sender is set and matches the
2001 address, except that the null address can always be set by any user. The
2002 test for this happens later, when the value given here is ignored when not
2003 permitted. For an untrusted user, the actual sender is still put in Sender:
2004 if it doesn't match the From: header (unless no_local_from_check is set).
2005 The data can follow the -f or be in the next argument. The -r switch is an
2006 obsolete form of -f but since there appear to be programs out there that
2007 use anything that sendmail has ever supported, better accept it - the
2008 synonymizing is done before the switch above.
2010 At this stage, we must allow domain literal addresses, because we don't
2011 know what the setting of allow_domain_literals is yet. Ditto for trailing
2012 dots and strip_trailing_dot. */
2020 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2021 { badarg
= TRUE
; break; }
2025 sender_address
= string_sprintf(""); /* Ensure writeable memory */
2029 uschar
*temp
= argrest
+ Ustrlen(argrest
) - 1;
2030 while (temp
>= argrest
&& isspace(*temp
)) temp
--;
2031 if (temp
>= argrest
&& *temp
== '.') f_end_dot
= TRUE
;
2032 allow_domain_literals
= TRUE
;
2033 strip_trailing_dot
= TRUE
;
2034 sender_address
= parse_extract_address(argrest
, &errmess
, &start
, &end
,
2035 &sender_address_domain
, TRUE
);
2036 allow_domain_literals
= FALSE
;
2037 strip_trailing_dot
= FALSE
;
2038 if (sender_address
== NULL
)
2040 fprintf(stderr
, "exim: bad -f address \"%s\": %s\n", argrest
, errmess
);
2041 return EXIT_FAILURE
;
2044 sender_address_forced
= TRUE
;
2048 /* This is some Sendmail thing which can be ignored */
2053 /* -h: Set the hop count for an incoming message. Exim does not currently
2054 support this; it always computes it by counting the Received: headers.
2055 To put it in will require a change to the spool header file format. */
2060 if(++i
< argc
) argrest
= argv
[i
]; else
2061 { badarg
= TRUE
; break; }
2063 if (!isdigit(*argrest
)) badarg
= TRUE
;
2067 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2068 not to be documented for sendmail but mailx (at least) uses it) */
2071 if (*argrest
== 0) dot_ends
= FALSE
; else badarg
= TRUE
;
2076 receiving_message
= FALSE
;
2078 /* -MC: continue delivery of another message via an existing open
2079 file descriptor. This option is used for an internal call by the
2080 smtp transport when there is a pending message waiting to go to an
2081 address to which it has got a connection. Five subsequent arguments are
2082 required: transport name, host name, IP address, sequence number, and
2083 message_id. Transports may decline to create new processes if the sequence
2084 number gets too big. The channel is stdin. This (-MC) must be the last
2085 argument. There's a subsequent check that the real-uid is privileged.
2087 If we are running in the test harness. delay for a bit, to let the process
2088 that set this one up complete. This makes for repeatability of the logging,
2091 if (Ustrcmp(argrest
, "C") == 0)
2095 fprintf(stderr
, "exim: too many or too few arguments after -MC\n");
2096 return EXIT_FAILURE
;
2099 if (msg_action_arg
>= 0)
2101 fprintf(stderr
, "exim: incompatible arguments\n");
2102 return EXIT_FAILURE
;
2105 continue_transport
= argv
[++i
];
2106 continue_hostname
= argv
[++i
];
2107 continue_host_address
= argv
[++i
];
2108 continue_sequence
= Uatoi(argv
[++i
]);
2109 msg_action
= MSG_DELIVER
;
2110 msg_action_arg
= ++i
;
2111 forced_delivery
= TRUE
;
2112 queue_run_pid
= passed_qr_pid
;
2113 queue_run_pipe
= passed_qr_pipe
;
2115 if (!mac_ismsgid(argv
[i
]))
2117 fprintf(stderr
, "exim: malformed message id %s after -MC option\n",
2119 return EXIT_FAILURE
;
2122 if (running_in_test_harness
) millisleep(500);
2126 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2127 precedes -MC (see above). The flag indicates that the host to which
2128 Exim is connected has accepted an AUTH sequence. */
2130 else if (Ustrcmp(argrest
, "CA") == 0)
2132 smtp_authenticated
= TRUE
;
2136 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2137 it preceded -MC (see above) */
2139 else if (Ustrcmp(argrest
, "CP") == 0)
2141 smtp_use_pipelining
= TRUE
;
2145 /* -MCQ: pass on the pid of the queue-running process that started
2146 this chain of deliveries and the fd of its synchronizing pipe; this
2147 is useful only when it precedes -MC (see above) */
2149 else if (Ustrcmp(argrest
, "CQ") == 0)
2151 if(++i
< argc
) passed_qr_pid
= (pid_t
)(Uatol(argv
[i
]));
2153 if(++i
< argc
) passed_qr_pipe
= (int)(Uatol(argv
[i
]));
2158 /* -MCS: set the smtp_use_size flag; this is useful only when it
2159 precedes -MC (see above) */
2161 else if (Ustrcmp(argrest
, "CS") == 0)
2163 smtp_use_size
= TRUE
;
2167 /* -MCT: set the tls_offered flag; this is useful only when it
2168 precedes -MC (see above). The flag indicates that the host to which
2169 Exim is connected has offered TLS support. */
2172 else if (Ustrcmp(argrest
, "CT") == 0)
2179 /* -M[x]: various operations on the following list of message ids:
2180 -M deliver the messages, ignoring next retry times and thawing
2181 -Mc deliver the messages, checking next retry times, no thawing
2182 -Mf freeze the messages
2183 -Mg give up on the messages
2184 -Mt thaw the messages
2185 -Mrm remove the messages
2186 In the above cases, this must be the last option. There are also the
2187 following options which are followed by a single message id, and which
2188 act on that message. Some of them use the "recipient" addresses as well.
2189 -Mar add recipient(s)
2190 -Mmad mark all recipients delivered
2191 -Mmd mark recipients(s) delivered
2198 else if (*argrest
== 0)
2200 msg_action
= MSG_DELIVER
;
2201 forced_delivery
= deliver_force_thaw
= TRUE
;
2203 else if (Ustrcmp(argrest
, "ar") == 0)
2205 msg_action
= MSG_ADD_RECIPIENT
;
2206 one_msg_action
= TRUE
;
2208 else if (Ustrcmp(argrest
, "c") == 0) msg_action
= MSG_DELIVER
;
2209 else if (Ustrcmp(argrest
, "es") == 0)
2211 msg_action
= MSG_EDIT_SENDER
;
2212 one_msg_action
= TRUE
;
2214 else if (Ustrcmp(argrest
, "f") == 0) msg_action
= MSG_FREEZE
;
2215 else if (Ustrcmp(argrest
, "g") == 0)
2217 msg_action
= MSG_DELIVER
;
2218 deliver_give_up
= TRUE
;
2220 else if (Ustrcmp(argrest
, "mad") == 0)
2222 msg_action
= MSG_MARK_ALL_DELIVERED
;
2224 else if (Ustrcmp(argrest
, "md") == 0)
2226 msg_action
= MSG_MARK_DELIVERED
;
2227 one_msg_action
= TRUE
;
2229 else if (Ustrcmp(argrest
, "rm") == 0) msg_action
= MSG_REMOVE
;
2230 else if (Ustrcmp(argrest
, "t") == 0) msg_action
= MSG_THAW
;
2231 else if (Ustrcmp(argrest
, "vb") == 0)
2233 msg_action
= MSG_SHOW_BODY
;
2234 one_msg_action
= TRUE
;
2236 else if (Ustrcmp(argrest
, "vh") == 0)
2238 msg_action
= MSG_SHOW_HEADER
;
2239 one_msg_action
= TRUE
;
2241 else if (Ustrcmp(argrest
, "vl") == 0)
2243 msg_action
= MSG_SHOW_LOG
;
2244 one_msg_action
= TRUE
;
2246 else { badarg
= TRUE
; break; }
2248 /* All the -Mxx options require at least one message id. */
2250 msg_action_arg
= i
+ 1;
2251 if (msg_action_arg
>= argc
)
2253 fprintf(stderr
, "exim: no message ids given after %s option\n", arg
);
2254 return EXIT_FAILURE
;
2257 /* Some require only message ids to follow */
2259 if (!one_msg_action
)
2262 for (j
= msg_action_arg
; j
< argc
; j
++) if (!mac_ismsgid(argv
[j
]))
2264 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2266 return EXIT_FAILURE
;
2268 goto END_ARG
; /* Remaining args are ids */
2271 /* Others require only one message id, possibly followed by addresses,
2272 which will be handled as normal arguments. */
2276 if (!mac_ismsgid(argv
[msg_action_arg
]))
2278 fprintf(stderr
, "exim: malformed message id %s after %s option\n",
2279 argv
[msg_action_arg
], arg
);
2280 return EXIT_FAILURE
;
2287 /* Some programs seem to call the -om option without the leading o;
2288 for sendmail it askes for "me too". Exim always does this. */
2291 if (*argrest
!= 0) badarg
= TRUE
;
2295 /* -N: don't do delivery - a debugging option that stops transports doing
2296 their thing. It implies debugging at the D_v level. */
2301 dont_deliver
= TRUE
;
2302 debug_selector
|= D_v
;
2303 debug_file
= stderr
;
2309 /* -n: This means "don't alias" in sendmail, apparently. Just ignore
2315 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2316 option to the specified value. This form uses long names. We need to handle
2317 -O option=value and -Ooption=value. */
2324 fprintf(stderr
, "exim: string expected after -O\n");
2332 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2335 if (*argrest
== 'A')
2337 alias_arg
= argrest
+ 1;
2338 if (alias_arg
[0] == 0)
2340 if (i
+1 < argc
) alias_arg
= argv
[++i
]; else
2342 fprintf(stderr
, "exim: string expected after -oA\n");
2348 /* -oB: Set a connection message max value for remote deliveries */
2350 else if (*argrest
== 'B')
2352 uschar
*p
= argrest
+ 1;
2355 if (i
+1 < argc
&& isdigit((argv
[i
+1][0]))) p
= argv
[++i
]; else
2357 connection_max_messages
= 1;
2366 fprintf(stderr
, "exim: number expected after -oB\n");
2369 connection_max_messages
= Uatoi(p
);
2373 /* -odb: background delivery */
2375 else if (Ustrcmp(argrest
, "db") == 0)
2377 synchronous_delivery
= FALSE
;
2378 arg_queue_only
= FALSE
;
2379 queue_only_set
= TRUE
;
2382 /* -odf: foreground delivery (smail-compatible option); same effect as
2383 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2386 else if (Ustrcmp(argrest
, "df") == 0 || Ustrcmp(argrest
, "di") == 0)
2388 synchronous_delivery
= TRUE
;
2389 arg_queue_only
= FALSE
;
2390 queue_only_set
= TRUE
;
2393 /* -odq: queue only */
2395 else if (Ustrcmp(argrest
, "dq") == 0)
2397 synchronous_delivery
= FALSE
;
2398 arg_queue_only
= TRUE
;
2399 queue_only_set
= TRUE
;
2402 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2403 but no remote delivery */
2405 else if (Ustrcmp(argrest
, "dqs") == 0)
2408 arg_queue_only
= FALSE
;
2409 queue_only_set
= TRUE
;
2412 /* -oex: Sendmail error flags. As these are also accepted without the
2413 leading -o prefix, for compatibility with vacation and other callers,
2414 they are handled with -e above. */
2416 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
2417 -oitrue: Another sendmail syntax for the same */
2419 else if (Ustrcmp(argrest
, "i") == 0 ||
2420 Ustrcmp(argrest
, "itrue") == 0)
2423 /* -oM*: Set various characteristics for an incoming message; actually
2424 acted on for trusted callers only. */
2426 else if (*argrest
== 'M')
2430 fprintf(stderr
, "exim: data expected after -o%s\n", argrest
);
2434 /* -oMa: Set sender host address */
2436 if (Ustrcmp(argrest
, "Ma") == 0) sender_host_address
= argv
[++i
];
2438 /* -oMaa: Set authenticator name */
2440 else if (Ustrcmp(argrest
, "Maa") == 0)
2441 sender_host_authenticated
= argv
[++i
];
2443 /* -oMas: setting authenticated sender */
2445 else if (Ustrcmp(argrest
, "Mas") == 0) authenticated_sender
= argv
[++i
];
2447 /* -oMai: setting authenticated id */
2449 else if (Ustrcmp(argrest
, "Mai") == 0) authenticated_id
= argv
[++i
];
2451 /* -oMi: Set incoming interface address */
2453 else if (Ustrcmp(argrest
, "Mi") == 0) interface_address
= argv
[++i
];
2455 /* -oMr: Received protocol */
2457 else if (Ustrcmp(argrest
, "Mr") == 0) received_protocol
= argv
[++i
];
2459 /* -oMs: Set sender host name */
2461 else if (Ustrcmp(argrest
, "Ms") == 0) sender_host_name
= argv
[++i
];
2463 /* -oMt: Set sender ident */
2465 else if (Ustrcmp(argrest
, "Mt") == 0) sender_ident
= argv
[++i
];
2467 /* Else a bad argument */
2476 /* -om: Me-too flag for aliases. Exim always does this. Some programs
2477 seem to call this as -m (undocumented), so that is also accepted (see
2480 else if (Ustrcmp(argrest
, "m") == 0) {}
2482 /* -oo: An ancient flag for old-style addresses which still seems to
2483 crop up in some calls (see in SCO). */
2485 else if (Ustrcmp(argrest
, "o") == 0) {}
2487 /* -oP <name>: set pid file path for daemon */
2489 else if (Ustrcmp(argrest
, "P") == 0)
2490 override_pid_file_path
= argv
[++i
];
2492 /* -or <n>: set timeout for non-SMTP acceptance
2493 -os <n>: set timeout for SMTP acceptance */
2495 else if (*argrest
== 'r' || *argrest
== 's')
2497 int *tp
= (*argrest
== 'r')?
2498 &arg_receive_timeout
: &arg_smtp_receive_timeout
;
2499 if (argrest
[1] == 0)
2501 if (i
+1 < argc
) *tp
= readconf_readtime(argv
[++i
], 0, FALSE
);
2503 else *tp
= readconf_readtime(argrest
+ 1, 0, FALSE
);
2506 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
2511 /* -oX <list>: Override local_interfaces and/or default daemon ports */
2513 else if (Ustrcmp(argrest
, "X") == 0)
2514 override_local_interfaces
= argv
[++i
];
2516 /* Unknown -o argument */
2522 /* -ps: force Perl startup; -pd force delayed Perl startup */
2526 if (*argrest
== 's' && argrest
[1] == 0)
2528 perl_start_option
= 1;
2531 if (*argrest
== 'd' && argrest
[1] == 0)
2533 perl_start_option
= -1;
2538 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
2539 which sets the host protocol and host name */
2543 if (i
+1 < argc
) argrest
= argv
[++i
]; else
2544 { badarg
= TRUE
; break; }
2549 uschar
*hn
= Ustrchr(argrest
, ':');
2552 received_protocol
= argrest
;
2556 received_protocol
= string_copyn(argrest
, hn
- argrest
);
2557 sender_host_name
= hn
+ 1;
2564 receiving_message
= FALSE
;
2566 /* -qq...: Do queue runs in a 2-stage manner */
2568 if (*argrest
== 'q')
2570 queue_2stage
= TRUE
;
2574 /* -qi...: Do only first (initial) deliveries */
2576 if (*argrest
== 'i')
2578 queue_run_first_delivery
= TRUE
;
2582 /* -qf...: Run the queue, forcing deliveries
2583 -qff..: Ditto, forcing thawing as well */
2585 if (*argrest
== 'f')
2587 queue_run_force
= TRUE
;
2588 if (*(++argrest
) == 'f')
2590 deliver_force_thaw
= TRUE
;
2595 /* -q[f][f]l...: Run the queue only on local deliveries */
2597 if (*argrest
== 'l')
2599 queue_run_local
= TRUE
;
2603 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
2604 optionally starting from a given message id. */
2606 if (*argrest
== 0 &&
2607 (i
+ 1 >= argc
|| argv
[i
+1][0] == '-' || mac_ismsgid(argv
[i
+1])))
2610 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
2611 start_queue_run_id
= argv
[++i
];
2612 if (i
+1 < argc
&& mac_ismsgid(argv
[i
+1]))
2613 stop_queue_run_id
= argv
[++i
];
2616 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
2617 optionally local only. */
2622 queue_interval
= readconf_readtime(argrest
, 0, FALSE
);
2624 queue_interval
= readconf_readtime(argv
[++i
], 0, FALSE
);
2625 if (queue_interval
<= 0)
2627 fprintf(stderr
, "exim: bad time value %s: abandoned\n", argv
[i
]);
2634 case 'R': /* Synonymous with -qR... */
2635 receiving_message
= FALSE
;
2637 /* -Rf: As -R (below) but force all deliveries,
2638 -Rff: Ditto, but also thaw all frozen messages,
2639 -Rr: String is regex
2640 -Rrf: Regex and force
2641 -Rrff: Regex and force and thaw
2643 in all cases provided there are no further characters in this
2649 for (i
= 0; i
< sizeof(rsopts
)/sizeof(uschar
*); i
++)
2651 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
2653 if (i
!= 2) queue_run_force
= TRUE
;
2654 if (i
>= 2) deliver_selectstring_regex
= TRUE
;
2655 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
2656 argrest
+= Ustrlen(rsopts
[i
]);
2661 /* -R: Set string to match in addresses for forced queue run to
2662 pick out particular messages. */
2666 if (i
+1 < argc
) deliver_selectstring
= argv
[++i
]; else
2668 fprintf(stderr
, "exim: string expected after -R\n");
2672 else deliver_selectstring
= argrest
;
2673 if (queue_interval
< 0) queue_interval
= 0;
2677 /* -r: an obsolete synonym for -f (see above) */
2680 /* -S: Like -R but works on sender. */
2682 case 'S': /* Synonymous with -qS... */
2683 receiving_message
= FALSE
;
2685 /* -Sf: As -S (below) but force all deliveries,
2686 -Sff: Ditto, but also thaw all frozen messages,
2687 -Sr: String is regex
2688 -Srf: Regex and force
2689 -Srff: Regex and force and thaw
2691 in all cases provided there are no further characters in this
2697 for (i
= 0; i
< sizeof(rsopts
)/sizeof(uschar
*); i
++)
2699 if (Ustrcmp(argrest
, rsopts
[i
]) == 0)
2701 if (i
!= 2) queue_run_force
= TRUE
;
2702 if (i
>= 2) deliver_selectstring_sender_regex
= TRUE
;
2703 if (i
== 1 || i
== 4) deliver_force_thaw
= TRUE
;
2704 argrest
+= Ustrlen(rsopts
[i
]);
2709 /* -S: Set string to match in addresses for forced queue run to
2710 pick out particular messages. */
2714 if (i
+1 < argc
) deliver_selectstring_sender
= argv
[++i
]; else
2716 fprintf(stderr
, "exim: string expected after -S\n");
2720 else deliver_selectstring_sender
= argrest
;
2721 if (queue_interval
< 0) queue_interval
= 0;
2724 /* -Tqt is an option that is exclusively for use by the testing suite.
2725 It is not recognized in other circumstances. It allows for the setting up
2726 of explicit "queue times" so that various warning/retry things can be
2727 tested. Otherwise variability of clock ticks etc. cause problems. */
2730 if (running_in_test_harness
&& Ustrcmp(argrest
, "qt") == 0)
2731 fudged_queue_times
= argv
[++i
];
2736 /* -t: Set flag to extract recipients from body of message. */
2739 if (*argrest
== 0) extract_recipients
= TRUE
;
2741 /* -ti: Set flag to extract recipients from body of message, and also
2742 specify that dot does not end the message. */
2744 else if (Ustrcmp(argrest
, "i") == 0)
2746 extract_recipients
= TRUE
;
2750 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
2753 else if (Ustrcmp(argrest
, "ls-on-connect") == 0) tls_on_connect
= TRUE
;
2760 /* -U: This means "initial user submission" in sendmail, apparently. The
2761 doc claims that in future sendmail may refuse syntactically invalid
2762 messages instead of fixing them. For the moment, we just ignore it. */
2768 /* -v: verify things - this is a very low-level debugging */
2773 debug_selector
|= D_v
;
2774 debug_file
= stderr
;
2780 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
2782 The -x flag tells the sendmail command that mail from a local
2783 mail program has National Language Support (NLS) extended characters
2784 in the body of the mail item. The sendmail command can send mail with
2785 extended NLS characters across networks that normally corrupts these
2788 As Exim is 8-bit clean, it just ignores this flag. */
2791 if (*argrest
!= 0) badarg
= TRUE
;
2794 /* All other initial characters are errors */
2799 } /* End of high-level switch statement */
2801 /* Failed to recognize the option, or syntax error */
2805 fprintf(stderr
, "exim abandoned: unknown, malformed, or incomplete "
2806 "option %s\n", arg
);
2812 /* Arguments have been processed. Check for incompatibilities. */
2816 (smtp_input
|| extract_recipients
|| recipients_arg
< argc
) &&
2817 (daemon_listen
|| queue_interval
>= 0 || bi_option
||
2818 test_retry_arg
>= 0 || test_rewrite_arg
>= 0 ||
2819 filter_test
!= FTEST_NONE
|| (msg_action_arg
> 0 && !one_msg_action
))
2822 msg_action_arg
> 0 &&
2823 (daemon_listen
|| queue_interval
>= 0 || list_options
|| checking
||
2824 bi_option
|| test_retry_arg
>= 0 || test_rewrite_arg
>= 0)
2827 (daemon_listen
|| queue_interval
>= 0) &&
2828 (sender_address
!= NULL
|| list_options
|| list_queue
|| checking
||
2832 daemon_listen
&& queue_interval
== 0
2836 (checking
|| smtp_input
|| extract_recipients
||
2837 filter_test
!= FTEST_NONE
|| bi_option
)
2840 verify_address_mode
&&
2841 (address_test_mode
|| smtp_input
|| extract_recipients
||
2842 filter_test
!= FTEST_NONE
|| bi_option
)
2845 address_test_mode
&& (smtp_input
|| extract_recipients
||
2846 filter_test
!= FTEST_NONE
|| bi_option
)
2849 smtp_input
&& (sender_address
!= NULL
|| filter_test
!= FTEST_NONE
||
2853 deliver_selectstring
!= NULL
&& queue_interval
< 0
2857 fprintf(stderr
, "exim: incompatible command-line options or arguments\n");
2861 /* If debugging is set up, set the file and the file descriptor to pass on to
2862 child processes. It should, of course, be 2 for stderr. Also, force the daemon
2863 to run in the foreground. */
2865 if (debug_selector
!= 0)
2867 debug_file
= stderr
;
2868 debug_fd
= fileno(debug_file
);
2869 background_daemon
= FALSE
;
2870 if (running_in_test_harness
) millisleep(100); /* lets caller finish */
2871 if (debug_selector
!= D_v
) /* -v only doesn't show this */
2873 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
2874 version_string
, (long int)real_uid
, (long int)real_gid
, (int)getpid(),
2876 show_whats_supported(stderr
);
2880 /* When started with root privilege, ensure that the limits on the number of
2881 open files and the number of processes (where that is accessible) are
2882 sufficiently large, or are unset, in case Exim has been called from an
2883 environment where the limits are screwed down. Not all OS have the ability to
2884 change some of these limits. */
2888 DEBUG(D_any
) debug_print_ids(US
"Exim has no root privilege:");
2894 #ifdef RLIMIT_NOFILE
2895 if (getrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
2897 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NOFILE) failed: %s",
2899 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
2902 /* I originally chose 1000 as a nice big number that was unlikely to
2903 be exceeded. It turns out that some older OS have a fixed upper limit of
2906 if (rlp
.rlim_cur
< 1000)
2908 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
2909 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
2911 rlp
.rlim_cur
= rlp
.rlim_max
= 256;
2912 if (setrlimit(RLIMIT_NOFILE
, &rlp
) < 0)
2913 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NOFILE) failed: %s",
2920 if (getrlimit(RLIMIT_NPROC
, &rlp
) < 0)
2922 log_write(0, LOG_MAIN
|LOG_PANIC
, "getrlimit(RLIMIT_NPROC) failed: %s",
2924 rlp
.rlim_cur
= rlp
.rlim_max
= 0;
2927 #ifdef RLIM_INFINITY
2928 if (rlp
.rlim_cur
!= RLIM_INFINITY
&& rlp
.rlim_cur
< 1000)
2930 rlp
.rlim_cur
= rlp
.rlim_max
= RLIM_INFINITY
;
2932 if (rlp
.rlim_cur
< 1000)
2934 rlp
.rlim_cur
= rlp
.rlim_max
= 1000;
2936 if (setrlimit(RLIMIT_NPROC
, &rlp
) < 0)
2937 log_write(0, LOG_MAIN
|LOG_PANIC
, "setrlimit(RLIMIT_NPROC) failed: %s",
2943 /* Exim is normally entered as root (but some special configurations are
2944 possible that don't do this). However, it always spins off sub-processes that
2945 set their uid and gid as required for local delivery. We don't want to pass on
2946 any extra groups that root may belong to, so we want to get rid of them all at
2949 We need to obey setgroups() at this stage, before possibly giving up root
2950 privilege for a changed configuration file, but later on we might need to
2951 check on the additional groups for the admin user privilege - can't do that
2952 till after reading the config, which might specify the exim gid. Therefore,
2953 save the group list here first. */
2955 group_count
= getgroups(NGROUPS_MAX
, group_list
);
2957 /* There is a fundamental difference in some BSD systems in the matter of
2958 groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
2959 known not to be different. On the "different" systems there is a single group
2960 list, and the first entry in it is the current group. On all other versions of
2961 Unix there is a supplementary group list, which is in *addition* to the current
2962 group. Consequently, to get rid of all extraneous groups on a "standard" system
2963 you pass over 0 groups to setgroups(), while on a "different" system you pass
2964 over a single group - the current group, which is always the first group in the
2965 list. Calling setgroups() with zero groups on a "different" system results in
2966 an error return. The following code should cope with both types of system.
2968 However, if this process isn't running as root, setgroups() can't be used
2969 since you have to be root to run it, even if throwing away groups. Not being
2970 root here happens only in some unusual configurations. We just ignore the
2973 if (setgroups(0, NULL
) != 0)
2975 if (setgroups(1, group_list
) != 0 && !unprivileged
)
2977 fprintf(stderr
, "exim: setgroups() failed: %s\n", strerror(errno
));
2982 /* If the configuration file name has been altered by an argument on the
2983 command line (either a new file name or a macro definition) and the caller is
2984 not root or the exim user, or if this is a filter testing run, remove any
2985 setuid privilege the program has, and run as the underlying user.
2987 If ALT_CONFIG_ROOT_ONLY is defined, the exim user is locked out of this, which
2988 severely restricts the use of -C for some purposes.
2990 Otherwise, set the real ids to the effective values (should be root unless run
2991 from inetd, which it can either be root or the exim uid, if one is configured).
2993 There is a private mechanism for bypassing some of this, in order to make it
2994 possible to test lots of configurations automatically, without having either to
2995 recompile each time, or to patch in an actual configuration file name and other
2996 values (such as the path name). If running in the test harness, pretend that
2997 configuration file changes and macro definitions haven't happened. */
3000 (config_changed
|| macros
!= NULL
) && /* Config changed, and */
3001 real_uid
!= root_uid
&& /* Not root, and */
3002 #ifndef ALT_CONFIG_ROOT_ONLY /* (when not locked out) */
3003 real_uid
!= exim_uid
&& /* Not exim, and */
3005 !running_in_test_harness
/* Not fudged */
3007 expansion_test
/* expansion testing */
3009 filter_test
!= FTEST_NONE
) /* Filter testing */
3011 setgroups(group_count
, group_list
);
3012 exim_setugid(real_uid
, real_gid
, FALSE
,
3013 US
"-C, -D, -be or -bf forces real uid");
3014 removed_privilege
= TRUE
;
3016 /* In the normal case when Exim is called like this, stderr is available
3017 and should be used for any logging information because attempts to write
3018 to the log will usually fail. To arrange this, we unset really_exim. However,
3019 if no stderr is available there is no point - we might as well have a go
3020 at the log (if it fails, syslog will be written). */
3022 if (log_stderr
!= NULL
) really_exim
= FALSE
;
3025 /* Privilege is to be retained for the moment. It may be dropped later,
3026 depending on the job that this Exim process has been asked to do. For now, set
3027 the real uid to the effective so that subsequent re-execs of Exim are done by a
3030 else exim_setugid(geteuid(), getegid(), FALSE
, US
"forcing real = effective");
3032 /* If testing a filter, open the file(s) now, before wasting time doing other
3033 setups and reading the message. */
3035 if ((filter_test
& FTEST_SYSTEM
) != 0)
3037 filter_sfd
= Uopen(filter_test_sfile
, O_RDONLY
, 0);
3040 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_sfile
,
3042 return EXIT_FAILURE
;
3046 if ((filter_test
& FTEST_USER
) != 0)
3048 filter_ufd
= Uopen(filter_test_ufile
, O_RDONLY
, 0);
3051 fprintf(stderr
, "exim: failed to open %s: %s\n", filter_test_ufile
,
3053 return EXIT_FAILURE
;
3057 /* Read the main runtime configuration data; this gives up if there
3058 is a failure. It leaves the configuration file open so that the subsequent
3059 configuration data for delivery can be read if needed. */
3063 /* Handle the decoding of logging options. */
3065 decode_bits(&log_write_selector
, &log_extra_selector
, 0, 0, log_selector_string
,
3066 log_options
, log_options_count
, US
"log");
3070 debug_printf("configuration file is %s\n", config_main_filename
);
3071 debug_printf("log selectors = %08x %08x\n", log_write_selector
,
3072 log_extra_selector
);
3075 /* If domain literals are not allowed, check the sender address that was
3076 supplied with -f. Ditto for a stripped trailing dot. */
3078 if (sender_address
!= NULL
)
3080 if (sender_address
[sender_address_domain
] == '[' && !allow_domain_literals
)
3082 fprintf(stderr
, "exim: bad -f address \"%s\": domain literals not "
3083 "allowed\n", sender_address
);
3084 return EXIT_FAILURE
;
3086 if (f_end_dot
&& !strip_trailing_dot
)
3088 fprintf(stderr
, "exim: bad -f address \"%s.\": domain is malformed "
3089 "(trailing dot not allowed)\n", sender_address
);
3090 return EXIT_FAILURE
;
3094 /* Paranoia check of maximum lengths of certain strings. There is a check
3095 on the length of the log file path in log.c, which will come into effect
3096 if there are any calls to write the log earlier than this. However, if we
3097 get this far but the string is very long, it is better to stop now than to
3098 carry on and (e.g.) receive a message and then have to collapse. The call to
3099 log_write() from here will cause the ultimate panic collapse if the complete
3100 file name exceeds the buffer length. */
3102 if (Ustrlen(log_file_path
) > 200)
3103 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3104 "log_file_path is longer than 200 chars: aborting");
3106 if (Ustrlen(pid_file_path
) > 200)
3107 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3108 "pid_file_path is longer than 200 chars: aborting");
3110 if (Ustrlen(spool_directory
) > 200)
3111 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3112 "spool_directory is longer than 200 chars: aborting");
3114 /* Length check on the process name given to syslog for its TAG field,
3115 which is only permitted to be 32 characters or less. See RFC 3164. */
3117 if (Ustrlen(syslog_processname
) > 32)
3118 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
,
3119 "syslog_processname is longer than 32 chars: aborting");
3121 /* In some operating systems, the environment variable TMPDIR controls where
3122 temporary files are created; Exim doesn't use these (apart from when delivering
3123 to MBX mailboxes), but called libraries such as DBM libraries may require them.
3124 If TMPDIR is found in the environment, reset it to the value defined in the
3125 TMPDIR macro, if this macro is defined. */
3130 for (p
= USS environ
; *p
!= NULL
; p
++)
3132 if (Ustrncmp(*p
, "TMPDIR=", 7) == 0 &&
3133 Ustrcmp(*p
+7, TMPDIR
) != 0)
3135 uschar
*newp
= malloc(Ustrlen(TMPDIR
) + 8);
3136 sprintf(CS newp
, "TMPDIR=%s", TMPDIR
);
3138 DEBUG(D_any
) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR
);
3144 /* Timezone handling. If timezone_string is "utc", set a flag to cause all
3145 timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3146 we may need to get rid of a bogus timezone setting. This can arise when Exim is
3147 called by a user who has set the TZ variable. This then affects the timestamps
3148 in log files and in Received: headers, and any created Date: header lines. The
3149 required timezone is settable in the configuration file, so nothing can be done
3150 about this earlier - but hopefully nothing will normally be logged earlier than
3151 this. We have to make a new environment if TZ is wrong, but don't bother if
3152 timestamps_utc is set, because then all times are in UTC anyway. */
3154 if (timezone_string
!= NULL
&& strcmpic(timezone_string
, US
"UTC") == 0)
3156 timestamps_utc
= TRUE
;
3160 uschar
*envtz
= US
getenv("TZ");
3161 if ((envtz
== NULL
&& timezone_string
!= NULL
) ||
3163 (timezone_string
== NULL
||
3164 Ustrcmp(timezone_string
, envtz
) != 0)))
3166 uschar
**p
= USS environ
;
3170 while (*p
++ != NULL
) count
++;
3171 if (envtz
== NULL
) count
++;
3172 newp
= new = malloc(sizeof(uschar
*) * (count
+ 1));
3173 for (p
= USS environ
; *p
!= NULL
; p
++)
3175 if (Ustrncmp(*p
, "TZ=", 3) == 0) continue;
3178 if (timezone_string
!= NULL
)
3180 *newp
= malloc(Ustrlen(timezone_string
) + 4);
3181 sprintf(CS
*newp
++, "TZ=%s", timezone_string
);
3186 DEBUG(D_any
) debug_printf("Reset TZ to %s: time is %s\n", timezone_string
,
3187 tod_stamp(tod_log
));
3191 /* Handle the case when we have removed the setuid privilege because of -C or
3192 -D. This means that the caller of Exim was not root, and, provided that
3193 ALT_CONFIG_ROOT_ONLY is not defined, was not the Exim user that is built into
3196 If ALT_CONFIG_ROOT_ONLY is not defined, there is a problem if it turns out we
3197 were running as the exim user defined in the configuration file (different to
3198 the one in the binary). The sysadmin may expect this case to retain privilege
3199 because "the binary was called by the Exim user", but it hasn't, because of the
3200 order in which it handles this stuff. There are two possibilities:
3202 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3203 to do message deliveries. Thus, the fact that it is running as a
3204 non-privileged user is plausible, and might be wanted in some special
3205 configurations. However, really_exim will have been set false when
3206 privilege was dropped, to stop Exim trying to write to its normal log
3207 files. Therefore, re-enable normal log processing, assuming the sysadmin
3208 has set up the log directory correctly.
3210 (2) If deliver_drop_privilege is not set, the configuration won't work as
3211 apparently intended, and so we log a panic message. In order to retain
3212 root for -C or -D, the caller must either be root or the Exim user
3213 defined in the binary (when deliver_drop_ privilege is false).
3215 If ALT_CONFIG_ROOT_ONLY is defined, we don't know whether we were called by the
3216 built-in exim user or one defined in the configuration. In either event,
3217 re-enable log processing, assuming the sysadmin knows what they are doing. */
3219 if (removed_privilege
&& (config_changed
|| macros
!= NULL
) &&
3220 real_uid
== exim_uid
)
3222 #ifdef ALT_CONFIG_ROOT_ONLY
3223 really_exim
= TRUE
; /* let logging work normally */
3226 if (deliver_drop_privilege
)
3227 really_exim
= TRUE
; /* let logging work normally */
3229 log_write(0, LOG_MAIN
|LOG_PANIC
,
3230 "exim user (uid=%d) is defined only at runtime; privilege lost for %s",
3231 (int)exim_uid
, config_changed
? "-C" : "-D");
3235 /* Start up Perl interpreter if Perl support is configured and there is a
3236 perl_startup option, and the configuration or the command line specifies
3237 initializing starting. Note that the global variables are actually called
3238 opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3241 if (perl_start_option
!= 0)
3242 opt_perl_at_start
= (perl_start_option
> 0);
3243 if (opt_perl_at_start
&& opt_perl_startup
!= NULL
)
3246 DEBUG(D_any
) debug_printf("Starting Perl interpreter\n");
3247 errstr
= init_perl(opt_perl_startup
);
3250 fprintf(stderr
, "exim: error in perl_startup code: %s\n", errstr
);
3251 return EXIT_FAILURE
;
3253 opt_perl_started
= TRUE
;
3255 #endif /* EXIM_PERL */
3257 /* Log the arguments of the call if the configuration file said so. This is
3258 a debugging feature for finding out what arguments certain MUAs actually use.
3259 Don't attempt it if logging is disabled, or if listing variables or if
3260 verifying/testing addresses or expansions. */
3262 if (((debug_selector
& D_any
) != 0 || (log_extra_selector
& LX_arguments
) != 0)
3263 && really_exim
&& !list_options
&& !checking
)
3266 uschar
*p
= big_buffer
;
3268 (void)getcwd(CS p
+4, big_buffer_size
- 4);
3270 (void)string_format(p
, big_buffer_size
- (p
- big_buffer
), " %d args:", argc
);
3272 for (i
= 0; i
< argc
; i
++)
3274 int len
= Ustrlen(argv
[i
]);
3277 if (p
+ len
+ 8 >= big_buffer
+ big_buffer_size
)
3280 log_write(0, LOG_MAIN
, "%s", big_buffer
);
3281 Ustrcpy(big_buffer
, "...");
3284 printing
= string_printing(argv
[i
]);
3285 if (printing
[0] == 0) quote
= US
"\""; else
3287 uschar
*pp
= printing
;
3289 while (*pp
!= 0) if (isspace(*pp
++)) { quote
= US
"\""; break; }
3291 sprintf(CS p
, " %s%.*s%s", quote
, (int)(big_buffer_size
-
3292 (p
- big_buffer
) - 4), printing
, quote
);
3296 if ((log_extra_selector
& LX_arguments
) != 0)
3297 log_write(0, LOG_MAIN
, "%s", big_buffer
);
3299 debug_printf("%s\n", big_buffer
);
3302 /* Set the working directory to be the top-level spool directory. We don't rely
3303 on this in the code, which always uses fully qualified names, but it's useful
3304 for core dumps etc. Don't complain if it fails - the spool directory might not
3305 be generally accessible and calls with the -C option (and others) have lost
3306 privilege by now. Before the chdir, we try to ensure that the directory exists.
3309 if (Uchdir(spool_directory
) != 0)
3311 (void)directory_make(spool_directory
, US
"", SPOOL_DIRECTORY_MODE
, FALSE
);
3312 (void)Uchdir(spool_directory
);
3315 /* Handle calls with the -bi option. This is a sendmail option to rebuild *the*
3316 alias file. Exim doesn't have such a concept, but this call is screwed into
3317 Sun's YP makefiles. Handle this by calling a configured script, as the real
3318 user who called Exim. The -oA option can be used to pass an argument to the
3323 (void)fclose(config_file
);
3324 if (bi_command
!= NULL
)
3328 argv
[i
++] = bi_command
;
3329 if (alias_arg
!= NULL
) argv
[i
++] = alias_arg
;
3332 setgroups(group_count
, group_list
);
3333 exim_setugid(real_uid
, real_gid
, FALSE
, US
"running bi_command");
3335 DEBUG(D_exec
) debug_printf("exec %.256s %.256s\n", argv
[0],
3336 (argv
[1] == NULL
)? US
"" : argv
[1]);
3338 execv(CS argv
[0], (char *const *)argv
);
3339 fprintf(stderr
, "exim: exec failed: %s\n", strerror(errno
));
3344 DEBUG(D_any
) debug_printf("-bi used but bi_command not set; exiting\n");
3349 /* If an action on specific messages is requested, or if a daemon or queue
3350 runner is being started, we need to know if Exim was called by an admin user.
3351 This is the case if the real user is root or exim, or if the real group is
3352 exim, or if one of the supplementary groups is exim or a group listed in
3353 admin_groups. We don't fail all message actions immediately if not admin_user,
3354 since some actions can be performed by non-admin users. Instead, set admin_user
3355 for later interrogation. */
3357 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| real_gid
== exim_gid
)
3363 for (i
= 0; i
< group_count
; i
++)
3365 if (group_list
[i
] == exim_gid
) admin_user
= TRUE
;
3366 else if (admin_groups
!= NULL
)
3368 for (j
= 1; j
<= (int)(admin_groups
[0]); j
++)
3369 if (admin_groups
[j
] == group_list
[i
])
3370 { admin_user
= TRUE
; break; }
3372 if (admin_user
) break;
3376 /* Another group of privileged users are the trusted users. These are root,
3377 exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3378 are permitted to specify sender_addresses with -f on the command line, and
3379 other message parameters as well. */
3381 if (real_uid
== root_uid
|| real_uid
== exim_uid
)
3382 trusted_caller
= TRUE
;
3387 if (trusted_users
!= NULL
)
3389 for (i
= 1; i
<= (int)(trusted_users
[0]); i
++)
3390 if (trusted_users
[i
] == real_uid
)
3391 { trusted_caller
= TRUE
; break; }
3394 if (!trusted_caller
&& trusted_groups
!= NULL
)
3396 for (i
= 1; i
<= (int)(trusted_groups
[0]); i
++)
3398 if (trusted_groups
[i
] == real_gid
)
3399 trusted_caller
= TRUE
;
3400 else for (j
= 0; j
< group_count
; j
++)
3402 if (trusted_groups
[i
] == group_list
[j
])
3403 { trusted_caller
= TRUE
; break; }
3405 if (trusted_caller
) break;
3410 if (trusted_caller
) DEBUG(D_any
) debug_printf("trusted user\n");
3411 if (admin_user
) DEBUG(D_any
) debug_printf("admin user\n");
3413 /* Only an admin user may start the daemon or force a queue run in the default
3414 configuration, but the queue run restriction can be relaxed. Only an admin
3415 user may request that a message be returned to its sender forthwith. Only an
3416 admin user may specify a debug level greater than D_v (because it might show
3417 passwords, etc. in lookup queries). Only an admin user may request a queue
3422 BOOL debugset
= (debug_selector
& ~D_v
) != 0;
3423 if (deliver_give_up
|| daemon_listen
||
3424 (count_queue
&& queue_list_requires_admin
) ||
3425 (list_queue
&& queue_list_requires_admin
) ||
3426 (queue_interval
>= 0 && prod_requires_admin
) ||
3427 (debugset
&& !running_in_test_harness
))
3429 fprintf(stderr
, "exim:%s permission denied\n", debugset
? " debugging" : "");
3434 /* If the real user is not root or the exim uid, the argument for passing
3435 in an open TCP/IP connection for another message is not permitted, nor is
3436 running with the -N option for any delivery action, unless this call to exim is
3437 one that supplied an input message, or we are using a patched exim for
3438 regression testing. */
3440 if (real_uid
!= root_uid
&& real_uid
!= exim_uid
&&
3441 (continue_hostname
!= NULL
||
3443 (queue_interval
>= 0 || daemon_listen
|| msg_action_arg
> 0)
3444 )) && !running_in_test_harness
)
3446 fprintf(stderr
, "exim: Permission denied\n");
3447 return EXIT_FAILURE
;
3450 /* If the caller is not trusted, certain arguments are ignored when running for
3451 real, but are permitted when checking things (-be, -bv, -bt, -bh, -bf, -bF).
3452 Note that authority for performing certain actions on messages is tested in the
3453 queue_action() function. */
3455 if (!trusted_caller
&& !checking
&& filter_test
== FTEST_NONE
)
3457 sender_host_name
= sender_host_address
= interface_address
=
3458 sender_ident
= received_protocol
= NULL
;
3459 sender_host_port
= interface_port
= 0;
3460 sender_host_authenticated
= authenticated_sender
= authenticated_id
= NULL
;
3463 /* If a sender host address is set, extract the optional port number off the
3464 end of it and check its syntax. Do the same thing for the interface address.
3465 Exim exits if the syntax is bad. */
3469 if (sender_host_address
!= NULL
)
3470 sender_host_port
= check_port(sender_host_address
);
3471 if (interface_address
!= NULL
)
3472 interface_port
= check_port(interface_address
);
3475 /* If an SMTP message is being received check to see if the standard input is a
3476 TCP/IP socket. If it is, we assume that Exim was called from inetd if the
3477 caller is root or the Exim user, or if the port is a privileged one. Otherwise,
3482 union sockaddr_46 inetd_sock
;
3483 EXIM_SOCKLEN_T size
= sizeof(inetd_sock
);
3484 if (getpeername(0, (struct sockaddr
*)(&inetd_sock
), &size
) == 0)
3486 int family
= ((struct sockaddr
*)(&inetd_sock
))->sa_family
;
3487 if (family
== AF_INET
|| family
== AF_INET6
)
3489 union sockaddr_46 interface_sock
;
3490 size
= sizeof(interface_sock
);
3492 if (getsockname(0, (struct sockaddr
*)(&interface_sock
), &size
) == 0)
3493 interface_address
= host_ntoa(-1, &interface_sock
, NULL
,
3496 if (host_is_tls_on_connect_port(interface_port
)) tls_on_connect
= TRUE
;
3498 if (real_uid
== root_uid
|| real_uid
== exim_uid
|| interface_port
< 1024)
3501 sender_host_address
= host_ntoa(-1, (struct sockaddr
*)(&inetd_sock
),
3502 NULL
, &sender_host_port
);
3503 if (mua_wrapper
) log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Input from "
3504 "inetd is not supported when mua_wrapper is set");
3509 "exim: Permission denied (unprivileged user, unprivileged port)\n");
3510 return EXIT_FAILURE
;
3516 /* If the load average is going to be needed while receiving a message, get it
3517 now for those OS that require the first call to os_getloadavg() to be done as
3518 root. There will be further calls later for each message received. */
3520 #ifdef LOAD_AVG_NEEDS_ROOT
3521 if (receiving_message
&&
3522 (queue_only_load
>= 0 ||
3523 (is_inetd
&& smtp_load_reserve
>= 0)
3526 load_average
= os_getloadavg();
3530 /* The queue_only configuration option can be overridden by -odx on the command
3531 line, except that if queue_only_override is false, queue_only cannot be unset
3532 from the command line. */
3534 if (queue_only_set
&& (queue_only_override
|| arg_queue_only
))
3535 queue_only
= arg_queue_only
;
3537 /* The receive_timeout and smtp_receive_timeout options can be overridden by
3540 if (arg_receive_timeout
>= 0) receive_timeout
= arg_receive_timeout
;
3541 if (arg_smtp_receive_timeout
>= 0)
3542 smtp_receive_timeout
= arg_smtp_receive_timeout
;
3544 /* If Exim was started with root privilege, unless we have already removed the
3545 root privilege above as a result of -C, -D, -be, -bf or -bF, remove it now
3546 except when starting the daemon or doing some kind of delivery or address
3547 testing (-bt). These are the only cases when root need to be retained. We run
3548 as exim for -bv and -bh. However, if deliver_drop_privilege is set, root is
3549 retained only for starting the daemon. */
3551 if (!unprivileged
&& /* originally had root AND */
3552 !removed_privilege
&& /* still got root AND */
3553 !daemon_listen
&& /* not starting the daemon */
3554 queue_interval
<= 0 && /* (either kind of daemon) */
3556 deliver_drop_privilege
|| /* requested unprivileged */
3558 queue_interval
< 0 && /* not running the queue */
3559 (msg_action_arg
< 0 || /* and */
3560 msg_action
!= MSG_DELIVER
) && /* not delivering and */
3561 (!checking
|| !address_test_mode
) /* not address checking */
3565 exim_setugid(exim_uid
, exim_gid
, FALSE
, US
"privilege not needed");
3568 /* When we are retaining a privileged uid, we still change to the exim gid. */
3570 else setgid(exim_gid
);
3572 /* Handle a request to list the delivery queue */
3576 set_process_info("listing the queue");
3577 queue_list(list_queue_option
, argv
+ recipients_arg
, argc
- recipients_arg
);
3581 /* Handle a request to count the delivery queue */
3585 set_process_info("counting the queue");
3590 /* Handle actions on specific messages, except for the force delivery action,
3591 which is done below. Some actions take a whole list of message ids, which
3592 are known to continue up to the end of the arguments. Others take a single
3593 message id and then operate on the recipients list. */
3595 if (msg_action_arg
> 0 && msg_action
!= MSG_DELIVER
)
3597 int yield
= EXIT_SUCCESS
;
3598 set_process_info("acting on specified messages");
3600 if (!one_msg_action
)
3602 for (i
= msg_action_arg
; i
< argc
; i
++)
3603 if (!queue_action(argv
[i
], msg_action
, NULL
, 0, 0))
3604 yield
= EXIT_FAILURE
;
3607 else if (!queue_action(argv
[msg_action_arg
], msg_action
, argv
, argc
,
3608 recipients_arg
)) yield
= EXIT_FAILURE
;
3612 /* All the modes below here require the remaining configuration sections
3613 to be read, except that we can skip over the ACL setting when delivering
3614 specific messages, or doing a queue run. (For various testing cases we could
3615 skip too, but as they are rare, it doesn't really matter.) The argument is TRUE
3618 readconf_rest(msg_action_arg
> 0 || (queue_interval
== 0 && !daemon_listen
));
3620 /* The configuration data will have been read into POOL_PERM because we won't
3621 ever want to reset back past it. Change the current pool to POOL_MAIN. In fact,
3622 this is just a bit of pedantic tidiness. It wouldn't really matter if the
3623 configuration were read into POOL_MAIN, because we don't do any resets till
3624 later on. However, it seems right, and it does ensure that both pools get used.
3627 store_pool
= POOL_MAIN
;
3629 /* Handle the -brt option. This is for checking out retry configurations.
3630 The next three arguments are a domain name or a complete address, and
3631 optionally two error numbers. All it does is to call the function that
3632 scans the retry configuration data. */
3634 if (test_retry_arg
>= 0)
3636 retry_config
*yield
;
3637 int basic_errno
= 0;
3641 if (test_retry_arg
>= argc
)
3643 printf("-brt needs a domain or address argument\n");
3644 exim_exit(EXIT_FAILURE
);
3646 s1
= argv
[test_retry_arg
++];
3649 /* If the first argument contains no @ and no . it might be a local user
3650 or it might be a single-component name. Treat as a domain. */
3652 if (Ustrchr(s1
, '@') == NULL
&& Ustrchr(s1
, '.') == NULL
)
3654 printf("Warning: \"%s\" contains no '@' and no '.' characters. It is "
3655 "being \ntreated as a one-component domain, not as a local part.\n\n",
3659 /* There may be an optional second domain arg. */
3661 if (test_retry_arg
< argc
&& Ustrchr(argv
[test_retry_arg
], '.') != NULL
)
3662 s2
= argv
[test_retry_arg
++];
3664 /* The final arg is an error name */
3666 if (test_retry_arg
< argc
)
3668 uschar
*ss
= argv
[test_retry_arg
];
3670 readconf_retry_error(ss
, ss
+ Ustrlen(ss
), &basic_errno
, &more_errno
);
3673 printf("%s\n", CS error
);
3674 return EXIT_FAILURE
;
3677 /* For the rcpt_4xx errors, a value of 255 means "any", and a code > 100 as
3678 an error is for matching codes to the decade. Turn them into a real error
3679 code, off the decade. */
3681 if (basic_errno
== ERRNO_RCPT4XX
)
3683 int code
= (more_errno
>> 8) & 255;
3685 more_errno
= (more_errno
& 0xffff00ff) | (21 << 8);
3686 else if (code
> 100)
3687 more_errno
= (more_errno
& 0xffff00ff) | ((code
- 96) << 8);
3691 yield
= retry_find_config(s1
, s2
, basic_errno
, more_errno
);
3692 if (yield
== NULL
) printf("No retry information found\n"); else
3695 more_errno
= yield
->more_errno
;
3696 printf("Retry rule: %s ", yield
->pattern
);
3698 if (yield
->basic_errno
== ERRNO_EXIMQUOTA
)
3700 printf("quota%s%s ",
3701 (more_errno
> 0)? "_" : "",
3702 (more_errno
> 0)? readconf_printtime(more_errno
) : US
"");
3704 else if (yield
->basic_errno
== ECONNREFUSED
)
3706 printf("refused%s%s ",
3707 (more_errno
> 0)? "_" : "",
3708 (more_errno
== 'M')? "MX" :
3709 (more_errno
== 'A')? "A" : "");
3711 else if (yield
->basic_errno
== ETIMEDOUT
)
3714 if ((more_errno
& RTEF_CTOUT
) != 0) printf("_connect");
3716 if (more_errno
!= 0) printf("_%s",
3717 (more_errno
== 'M')? "MX" : "A");
3720 else if (yield
->basic_errno
== ERRNO_AUTHFAIL
)
3721 printf("auth_failed ");
3724 for (r
= yield
->rules
; r
!= NULL
; r
= r
->next
)
3726 printf("%c,%s", r
->rule
, readconf_printtime(r
->timeout
)); /* Do not */
3727 printf(",%s", readconf_printtime(r
->p1
)); /* amalgamate */
3733 printf(",%d.", x
/1000);
3747 exim_exit(EXIT_SUCCESS
);
3750 /* Handle a request to list one or more configuration options */
3754 set_process_info("listing variables");
3755 if (recipients_arg
>= argc
) readconf_print(US
"all", NULL
);
3756 else for (i
= recipients_arg
; i
< argc
; i
++)
3759 (Ustrcmp(argv
[i
], "router") == 0 ||
3760 Ustrcmp(argv
[i
], "transport") == 0 ||
3761 Ustrcmp(argv
[i
], "authenticator") == 0))
3763 readconf_print(argv
[i
+1], argv
[i
]);
3766 else readconf_print(argv
[i
], NULL
);
3768 exim_exit(EXIT_SUCCESS
);
3772 /* Handle a request to deliver one or more messages that are already on the
3773 queue. Values of msg_action other than MSG_DELIVER are dealt with above. This
3774 is typically used for a small number when prodding by hand (when the option
3775 forced_delivery will be set) or when re-execing to regain root privilege.
3776 Each message delivery must happen in a separate process, so we fork a process
3777 for each one, and run them sequentially so that debugging output doesn't get
3778 intertwined, and to avoid spawning too many processes if a long list is given.
3779 However, don't fork for the last one; this saves a process in the common case
3780 when Exim is called to deliver just one message. */
3782 if (msg_action_arg
> 0)
3784 if (prod_requires_admin
&& !admin_user
)
3786 fprintf(stderr
, "exim: Permission denied\n");
3787 exim_exit(EXIT_FAILURE
);
3789 set_process_info("delivering specified messages");
3790 if (deliver_give_up
) forced_delivery
= deliver_force_thaw
= TRUE
;
3791 for (i
= msg_action_arg
; i
< argc
; i
++)
3796 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
3797 else if ((pid
= fork()) == 0)
3799 (void)deliver_message(argv
[i
], forced_delivery
, deliver_give_up
);
3800 _exit(EXIT_SUCCESS
);
3804 fprintf(stderr
, "failed to fork delivery process for %s: %s\n", argv
[i
],
3806 exim_exit(EXIT_FAILURE
);
3810 exim_exit(EXIT_SUCCESS
);
3814 /* If only a single queue run is requested, without SMTP listening, we can just
3815 turn into a queue runner, with an optional starting message id. */
3817 if (queue_interval
== 0 && !daemon_listen
)
3819 DEBUG(D_queue_run
) debug_printf("Single queue run%s%s%s%s\n",
3820 (start_queue_run_id
== NULL
)? US
"" : US
" starting at ",
3821 (start_queue_run_id
== NULL
)? US
"" : start_queue_run_id
,
3822 (stop_queue_run_id
== NULL
)? US
"" : US
" stopping at ",
3823 (stop_queue_run_id
== NULL
)? US
"" : stop_queue_run_id
);
3824 set_process_info("running the queue (single queue run)");
3825 queue_run(start_queue_run_id
, stop_queue_run_id
, FALSE
);
3826 exim_exit(EXIT_SUCCESS
);
3830 /* Find the login name of the real user running this process. This is always
3831 needed when receiving a message, because it is written into the spool file. It
3832 may also be used to construct a from: or a sender: header, and in this case we
3833 need the user's full name as well, so save a copy of it, checked for RFC822
3834 syntax and munged if necessary, if it hasn't previously been set by the -F
3835 argument. We may try to get the passwd entry more than once, in case NIS or
3836 other delays are in evidence. Save the home directory for use in filter testing
3841 if ((pw
= getpwuid(real_uid
)) != NULL
)
3843 originator_login
= string_copy(US pw
->pw_name
);
3844 originator_home
= string_copy(US pw
->pw_dir
);
3846 /* If user name has not been set by -F, set it from the passwd entry
3847 unless -f has been used to set the sender address by a trusted user. */
3849 if (originator_name
== NULL
)
3851 if (sender_address
== NULL
||
3852 (!trusted_caller
&& filter_test
== FTEST_NONE
))
3854 uschar
*name
= US pw
->pw_gecos
;
3855 uschar
*amp
= Ustrchr(name
, '&');
3858 /* Most Unix specify that a '&' character in the gecos field is
3859 replaced by a copy of the login name, and some even specify that
3860 the first character should be upper cased, so that's what we do. */
3865 string_format(buffer
, sizeof(buffer
), "%.*s%n%s%s",
3866 amp
- name
, name
, &loffset
, originator_login
, amp
+ 1);
3867 buffer
[loffset
] = toupper(buffer
[loffset
]);
3871 /* If a pattern for matching the gecos field was supplied, apply
3872 it and then expand the name string. */
3874 if (gecos_pattern
!= NULL
&& gecos_name
!= NULL
)
3877 re
= regex_must_compile(gecos_pattern
, FALSE
, TRUE
); /* Use malloc */
3879 if (regex_match_and_setup(re
, name
, 0, -1))
3881 uschar
*new_name
= expand_string(gecos_name
);
3883 if (new_name
!= NULL
)
3885 DEBUG(D_receive
) debug_printf("user name \"%s\" extracted from "
3886 "gecos field \"%s\"\n", new_name
, name
);
3889 else DEBUG(D_receive
) debug_printf("failed to expand gecos_name string "
3890 "\"%s\": %s\n", gecos_name
, expand_string_message
);
3892 else DEBUG(D_receive
) debug_printf("gecos_pattern \"%s\" did not match "
3893 "gecos field \"%s\"\n", gecos_pattern
, name
);
3894 store_free((void *)re
);
3896 originator_name
= string_copy(name
);
3899 /* A trusted caller has used -f but not -F */
3901 else originator_name
= US
"";
3904 /* Break the retry loop */
3909 if (++i
> finduser_retries
) break;
3913 /* If we cannot get a user login, log the incident and give up, unless the
3914 configuration specifies something to use. When running in the test harness,
3915 any setting of unknown_login overrides the actual login name. */
3917 if (originator_login
== NULL
|| running_in_test_harness
)
3919 if (unknown_login
!= NULL
)
3921 originator_login
= expand_string(unknown_login
);
3922 if (originator_name
== NULL
&& unknown_username
!= NULL
)
3923 originator_name
= expand_string(unknown_username
);
3924 if (originator_name
== NULL
) originator_name
= US
"";
3926 if (originator_login
== NULL
)
3927 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Failed to get user name for uid %d",
3931 /* Ensure that the user name is in a suitable form for use as a "phrase" in an
3934 originator_name
= string_copy(parse_fix_phrase(originator_name
,
3935 Ustrlen(originator_name
), big_buffer
, big_buffer_size
));
3937 /* If a message is created by this call of Exim, the uid/gid of its originator
3938 are those of the caller. These values are overridden if an existing message is
3939 read in from the spool. */
3941 originator_uid
= real_uid
;
3942 originator_gid
= real_gid
;
3944 DEBUG(D_receive
) debug_printf("originator: uid=%d gid=%d login=%s name=%s\n",
3945 (int)originator_uid
, (int)originator_gid
, originator_login
, originator_name
);
3947 /* Run in daemon and/or queue-running mode. The function daemon_go() never
3948 returns. We leave this till here so that the originator_ fields are available
3949 for incoming messages via the daemon. The daemon cannot be run in mua_wrapper
3952 if (daemon_listen
|| queue_interval
> 0)
3956 fprintf(stderr
, "Daemon cannot be run when mua_wrapper is set\n");
3957 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "Daemon cannot be run when "
3958 "mua_wrapper is set");
3963 /* If the sender ident has not been set (by a trusted caller) set it to
3964 the caller. This will get overwritten below for an inetd call. If a trusted
3965 caller has set it empty, unset it. */
3967 if (sender_ident
== NULL
) sender_ident
= originator_login
;
3968 else if (sender_ident
[0] == 0) sender_ident
= NULL
;
3970 /* Handle the -brw option, which is for checking out rewriting rules. Cause log
3971 writes (on errors) to go to stderr instead. Can't do this earlier, as want the
3972 originator_* variables set. */
3974 if (test_rewrite_arg
>= 0)
3976 really_exim
= FALSE
;
3977 if (test_rewrite_arg
>= argc
)
3979 printf("-brw needs an address argument\n");
3980 exim_exit(EXIT_FAILURE
);
3982 rewrite_test(argv
[test_rewrite_arg
]);
3983 exim_exit(EXIT_SUCCESS
);
3986 /* A locally-supplied message is considered to be coming from a local user
3987 unless a trusted caller supplies a sender address with -f, or is passing in the
3988 message via SMTP (inetd invocation or otherwise). */
3990 if ((sender_address
== NULL
&& !smtp_input
) ||
3991 (!trusted_caller
&& filter_test
== FTEST_NONE
))
3993 sender_local
= TRUE
;
3995 /* A trusted caller can supply authenticated_sender and authenticated_id
3996 via -oMas and -oMai and if so, they will already be set. */
3998 if (authenticated_sender
== NULL
)
3999 authenticated_sender
= string_sprintf("%s@%s", originator_login
,
4000 qualify_domain_sender
);
4001 if (authenticated_id
== NULL
) authenticated_id
= originator_login
;
4004 /* Trusted callers are always permitted to specify the sender address.
4005 Untrusted callers may specify it if it matches untrusted_set_sender, or if what
4006 is specified is the empty address. However, if a trusted caller does not
4007 specify a sender address for SMTP input, we leave sender_address unset. This
4008 causes the MAIL commands to be honoured. */
4010 if ((!smtp_input
&& sender_address
== NULL
) ||
4011 !receive_check_set_sender(sender_address
))
4013 /* Either the caller is not permitted to set a general sender, or this is
4014 non-SMTP input and the trusted caller has not set a sender. If there is no
4015 sender, or if a sender other than <> is set, override with the originator's
4016 login (which will get qualified below), except when checking things. */
4018 if (sender_address
== NULL
/* No sender_address set */
4020 (sender_address
[0] != 0 && /* Non-empty sender address, AND */
4021 !checking
&& /* Not running tests, AND */
4022 filter_test
== FTEST_NONE
)) /* Not testing a filter */
4024 sender_address
= originator_login
;
4025 sender_address_forced
= FALSE
;
4026 sender_address_domain
= 0;
4030 /* Remember whether an untrusted caller set the sender address */
4032 sender_set_untrusted
= sender_address
!= originator_login
&& !trusted_caller
;
4034 /* Ensure that the sender address is fully qualified unless it is the empty
4035 address, which indicates an error message, or doesn't exist (root caller, smtp
4036 interface, no -f argument). */
4038 if (sender_address
!= NULL
&& sender_address
[0] != 0 &&
4039 sender_address_domain
== 0)
4040 sender_address
= string_sprintf("%s@%s", local_part_quote(sender_address
),
4041 qualify_domain_sender
);
4043 DEBUG(D_receive
) debug_printf("sender address = %s\n", sender_address
);
4045 /* Handle a request to verify a list of addresses, or test them for delivery.
4046 This must follow the setting of the sender address, since routers can be
4047 predicated upon the sender. If no arguments are given, read addresses from
4048 stdin. Set debug_level to at least D_v to get full output for address testing.
4051 if (verify_address_mode
|| address_test_mode
)
4054 int flags
= vopt_qualify
;
4056 if (verify_address_mode
)
4058 if (!verify_as_sender
) flags
|= vopt_is_recipient
;
4059 DEBUG(D_verify
) debug_print_ids(US
"Verifying:");
4064 flags
|= vopt_is_recipient
;
4065 debug_selector
|= D_v
;
4066 debug_file
= stderr
;
4067 debug_fd
= fileno(debug_file
);
4068 DEBUG(D_verify
) debug_print_ids(US
"Address testing:");
4071 if (recipients_arg
< argc
)
4073 while (recipients_arg
< argc
)
4075 uschar
*s
= argv
[recipients_arg
++];
4078 BOOL finished
= FALSE
;
4079 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4080 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4081 test_address(s
, flags
, &exit_value
);
4084 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
4091 uschar
*s
= get_stdinput(NULL
, NULL
);
4092 if (s
== NULL
) break;
4093 test_address(s
, flags
, &exit_value
);
4097 exim_exit(exit_value
);
4100 /* Handle expansion checking */
4104 if (recipients_arg
< argc
)
4106 while (recipients_arg
< argc
)
4108 uschar
*s
= argv
[recipients_arg
++];
4109 uschar
*ss
= expand_string(s
);
4111 printf ("Failed: %s\n", expand_string_message
);
4112 else printf("%s\n", CS ss
);
4120 char *(*fn_readline
)(char *) = NULL
;
4121 char *(*fn_addhist
)(char *) = NULL
;
4124 void *dlhandle
= set_readline(&fn_readline
, &fn_addhist
);
4130 uschar
*source
= get_stdinput(fn_readline
, fn_addhist
);
4131 if (source
== NULL
) break;
4132 ss
= expand_string(source
);
4134 printf ("Failed: %s\n", expand_string_message
);
4135 else printf("%s\n", CS ss
);
4139 if (dlhandle
!= NULL
) dlclose(dlhandle
);
4143 exim_exit(EXIT_SUCCESS
);
4147 /* The active host name is normally the primary host name, but it can be varied
4148 for hosts that want to play several parts at once. We need to ensure that it is
4149 set for host checking, and for receiving messages. */
4151 smtp_active_hostname
= primary_hostname
;
4152 if (raw_active_hostname
!= NULL
)
4154 uschar
*nah
= expand_string(raw_active_hostname
);
4157 if (!expand_string_forcedfail
)
4158 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand \"%s\" "
4159 "(smtp_active_hostname): %s", raw_active_hostname
,
4160 expand_string_message
);
4162 else if (nah
[0] != 0) smtp_active_hostname
= nah
;
4165 /* Handle host checking: this facility mocks up an incoming SMTP call from a
4166 given IP address so that the blocking and relay configuration can be tested. An
4167 RFC 1413 call is made only if we are running in the test harness and an
4168 incoming interface and both ports are specified, because there is no TCP/IP
4169 call to find the ident for. */
4176 sender_ident
= NULL
;
4177 if (running_in_test_harness
&& sender_host_port
!= 0 &&
4178 interface_address
!= NULL
&& interface_port
!= 0)
4179 verify_get_ident(1413);
4181 /* In case the given address is a non-canonical IPv6 address, canonicize
4182 it. The code works for both IPv4 and IPv6, as it happens. */
4184 size
= host_aton(sender_host_address
, x
);
4185 sender_host_address
= store_get(48); /* large enough for full IPv6 */
4186 (void)host_nmtoa(size
, x
, -1, sender_host_address
, ':');
4188 /* Now set up for testing */
4190 host_build_sender_fullhost();
4194 sender_local
= FALSE
;
4195 sender_host_notsocket
= TRUE
;
4196 debug_file
= stderr
;
4197 debug_fd
= fileno(debug_file
);
4198 fprintf(stdout
, "\n**** SMTP testing session as if from host %s\n"
4199 "**** but without any ident (RFC 1413) callback.\n"
4200 "**** This is not for real!\n\n",
4201 sender_host_address
);
4203 if (verify_check_host(&hosts_connection_nolog
) == OK
)
4204 log_write_selector
&= ~L_smtp_connection
;
4205 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
4207 if (smtp_start_session())
4209 reset_point
= store_get(0);
4212 store_reset(reset_point
);
4213 if (smtp_setup_msg() <= 0) break;
4214 if (!receive_msg(FALSE
)) break;
4217 exim_exit(EXIT_SUCCESS
);
4221 /* Arrange for message reception if recipients or SMTP were specified;
4222 otherwise complain unless a version print (-bV) happened or this is a filter
4223 verification test. In the former case, show the configuration file name. */
4225 if (recipients_arg
>= argc
&& !extract_recipients
&& !smtp_input
)
4227 if (version_printed
)
4229 printf("Configuration file is %s\n", config_main_filename
);
4230 return EXIT_SUCCESS
;
4232 if (filter_test
== FTEST_NONE
)
4235 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
4236 "not directly from a shell command line. Options and/or arguments control\n"
4237 "what it does when called. For a list of options, see the Exim documentation.\n");
4238 return EXIT_FAILURE
;
4243 /* If mua_wrapper is set, Exim is being used to turn an MUA that submits on the
4244 standard input into an MUA that submits to a smarthost over TCP/IP. We know
4245 that we are not called from inetd, because that is rejected above. The
4246 following configuration settings are forced here:
4248 (1) Synchronous delivery (-odi)
4249 (2) Errors to stderr (-oep == -oeq)
4250 (3) No parallel remote delivery
4251 (4) Unprivileged delivery
4253 We don't force overall queueing options because there are several of them;
4254 instead, queueing is avoided below when mua_wrapper is set. However, we do need
4255 to override any SMTP queueing. */
4259 synchronous_delivery
= TRUE
;
4260 arg_error_handling
= ERRORS_STDERR
;
4261 remote_max_parallel
= 1;
4262 deliver_drop_privilege
= TRUE
;
4264 queue_smtp_domains
= NULL
;
4268 /* Prepare to accept one or more new messages on the standard input. When a
4269 message has been read, its id is returned in message_id[]. If doing immediate
4270 delivery, we fork a delivery process for each received message, except for the
4271 last one, where we can save a process switch.
4273 It is only in non-smtp mode that error_handling is allowed to be changed from
4274 its default of ERRORS_SENDER by argument. (Idle thought: are any of the
4275 sendmail error modes other than -oem ever actually used? Later: yes.) */
4277 if (!smtp_input
) error_handling
= arg_error_handling
;
4279 /* If this is an inetd call, ensure that stderr is closed to prevent panic
4280 logging being sent down the socket and make an identd call to get the
4285 (void)fclose(stderr
);
4286 exim_nullstd(); /* Re-open to /dev/null */
4287 verify_get_ident(IDENT_PORT
);
4288 host_build_sender_fullhost();
4289 set_process_info("handling incoming connection from %s via inetd",
4293 /* If the sender host address has been set, build sender_fullhost if it hasn't
4294 already been done (which it will have been for inetd). This caters for the
4295 case when it is forced by -oMa. However, we must flag that it isn't a socket,
4296 so that the test for IP options is skipped for -bs input. */
4298 if (sender_host_address
!= NULL
&& sender_fullhost
== NULL
)
4300 host_build_sender_fullhost();
4301 set_process_info("handling incoming connection from %s via -oMa",
4303 sender_host_notsocket
= TRUE
;
4306 /* Otherwise, set the sender host as unknown except for inetd calls. This
4307 prevents host checking in the case of -bs not from inetd and also for -bS. */
4309 else if (!is_inetd
) sender_host_unknown
= TRUE
;
4311 /* If stdout does not exist, then dup stdin to stdout. This can happen
4312 if exim is started from inetd. In this case fd 0 will be set to the socket,
4313 but fd 1 will not be set. This also happens for passed SMTP channels. */
4315 if (fstat(1, &statbuf
) < 0) (void)dup2(0, 1);
4317 /* Set up the incoming protocol name and the state of the program. Root
4318 is allowed to force received protocol via the -oMr option above, and if we are
4319 in a non-local SMTP state it means we have come via inetd and the process info
4320 has already been set up. We don't set received_protocol here for smtp input,
4321 as it varies according to batch/HELO/EHLO/AUTH/TLS. */
4325 if (sender_local
) set_process_info("accepting a local SMTP message from <%s>",
4330 if (received_protocol
== NULL
)
4331 received_protocol
= string_sprintf("local%s", called_as
);
4332 set_process_info("accepting a local non-SMTP message from <%s>",
4336 /* Initialize the local_queue-only flag (this will be ignored if mua_wrapper is
4340 local_queue_only
= queue_only
;
4342 /* For non-SMTP and for batched SMTP input, check that there is enough space on
4343 the spool if so configured. On failure, we must not attempt to send an error
4344 message! (For interactive SMTP, the check happens at MAIL FROM and an SMTP
4345 error code is given.) */
4347 if ((!smtp_input
|| smtp_batched_input
) && !receive_check_fs(0))
4349 fprintf(stderr
, "exim: insufficient disk space\n");
4350 return EXIT_FAILURE
;
4353 /* If this is smtp input of any kind, handle the start of the SMTP
4360 if (verify_check_host(&hosts_connection_nolog
) == OK
)
4361 log_write_selector
&= ~L_smtp_connection
;
4362 log_write(L_smtp_connection
, LOG_MAIN
, "%s", smtp_get_connection_info());
4363 if (!smtp_start_session())
4366 exim_exit(EXIT_SUCCESS
);
4370 /* Otherwise, set up the input size limit here */
4374 thismessage_size_limit
= expand_string_integer(message_size_limit
);
4375 if (thismessage_size_limit
< 0)
4377 if (thismessage_size_limit
== -1)
4378 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "failed to expand "
4379 "message_size_limit: %s", expand_string_message
);
4381 log_write(0, LOG_MAIN
|LOG_PANIC_DIE
, "invalid value for "
4382 "message_size_limit: %s", expand_string_message
);
4386 /* Loop for several messages when reading SMTP input. If we fork any child
4387 processes, we don't want to wait for them unless synchronous delivery is
4388 requested, so set SIGCHLD to SIG_IGN in that case. This is not necessarily the
4389 same as SIG_DFL, despite the fact that documentation often lists the default as
4390 "ignore". This is a confusing area. This is what I know:
4392 At least on some systems (e.g. Solaris), just setting SIG_IGN causes child
4393 processes that complete simply to go away without ever becoming defunct. You
4394 can't then wait for them - but we don't want to wait for them in the
4395 non-synchronous delivery case. However, this behaviour of SIG_IGN doesn't
4396 happen for all OS (e.g. *BSD is different).
4398 But that's not the end of the story. Some (many? all?) systems have the
4399 SA_NOCLDWAIT option for sigaction(). This requests the behaviour that Solaris
4400 has by default, so it seems that the difference is merely one of default
4401 (compare restarting vs non-restarting signals).
4403 To cover all cases, Exim sets SIG_IGN with SA_NOCLDWAIT here if it can. If not,
4404 it just sets SIG_IGN. To be on the safe side it also calls waitpid() at the end
4405 of the loop below. Paranoia rules.
4407 February 2003: That's *still* not the end of the story. There are now versions
4408 of Linux (where SIG_IGN does work) that are picky. If, having set SIG_IGN, a
4409 process then calls waitpid(), a grumble is written to the system log, because
4410 this is logically inconsistent. In other words, it doesn't like the paranoia.
4411 As a consequenc of this, the waitpid() below is now excluded if we are sure
4412 that SIG_IGN works. */
4414 if (!synchronous_delivery
)
4417 struct sigaction act
;
4418 act
.sa_handler
= SIG_IGN
;
4419 sigemptyset(&(act
.sa_mask
));
4420 act
.sa_flags
= SA_NOCLDWAIT
;
4421 sigaction(SIGCHLD
, &act
, NULL
);
4423 signal(SIGCHLD
, SIG_IGN
);
4427 /* Save the current store pool point, for resetting at the start of
4428 each message, and save the real sender address, if any. */
4430 reset_point
= store_get(0);
4431 real_sender_address
= sender_address
;
4433 /* Loop to receive messages; receive_msg() returns TRUE if there are more
4434 messages to be read (SMTP input), or FALSE otherwise (not SMTP, or SMTP channel
4439 store_reset(reset_point
);
4442 /* In the SMTP case, we have to handle the initial SMTP input and build the
4443 recipients list, before calling receive_msg() to read the message proper.
4444 Whatever sender address is actually given in the SMTP transaction is
4445 actually ignored for local senders - we use the actual sender, which is
4446 normally either the underlying user running this process or a -f argument
4447 provided by a trusted caller. It is saved in real_sender_address.
4449 However, if this value is NULL, we are dealing with a trusted caller when
4450 -f was not used; in this case, the SMTP sender is allowed to stand.
4452 Also, if untrusted_set_sender is set, we permit sender addresses that match
4453 anything in its list.
4455 The variable raw_sender_address holds the sender address before rewriting. */
4460 if ((rc
= smtp_setup_msg()) > 0)
4462 if (real_sender_address
!= NULL
&&
4463 !receive_check_set_sender(sender_address
))
4465 sender_address
= raw_sender
= real_sender_address
;
4466 sender_address_unrewritten
= NULL
;
4468 more
= receive_msg(extract_recipients
);
4469 if (message_id
[0] == 0)
4472 exim_exit(EXIT_FAILURE
);
4475 else exim_exit((rc
== 0)? EXIT_SUCCESS
: EXIT_FAILURE
);
4478 /* In the non-SMTP case, we have all the information from the command
4479 line, but must process it in case it is in the more general RFC822
4480 format, and in any case, to detect syntax errors. Also, it appears that
4481 the use of comma-separated lists as single arguments is common, so we
4482 had better support them. */
4488 int count
= argc
- recipients_arg
;
4489 uschar
**list
= argv
+ recipients_arg
;
4491 /* These options cannot be changed dynamically for non-SMTP messages */
4493 active_local_sender_retain
= local_sender_retain
;
4494 active_local_from_check
= local_from_check
;
4496 /* Save before any rewriting */
4498 raw_sender
= string_copy(sender_address
);
4500 /* Loop for each argument */
4502 for (i
= 0; i
< count
; i
++)
4504 int start
, end
, domain
;
4506 uschar
*s
= list
[i
];
4508 /* Loop for each comma-separated address */
4512 BOOL finished
= FALSE
;
4514 uschar
*ss
= parse_find_address_end(s
, FALSE
);
4516 if (*ss
== ',') *ss
= 0; else finished
= TRUE
;
4518 /* Check max recipients - if -t was used, these aren't recipients */
4520 if (recipients_max
> 0 && ++rcount
> recipients_max
&&
4521 !extract_recipients
)
4523 if (error_handling
== ERRORS_STDERR
)
4525 fprintf(stderr
, "exim: too many recipients\n");
4526 exim_exit(EXIT_FAILURE
);
4531 moan_to_sender(ERRMESS_TOOMANYRECIP
, NULL
, NULL
, stdin
, TRUE
)?
4532 errors_sender_rc
: EXIT_FAILURE
;
4537 parse_extract_address(s
, &errmess
, &start
, &end
, &domain
, FALSE
);
4539 if (domain
== 0 && !allow_unqualified_recipient
)
4542 errmess
= US
"unqualified recipient address not allowed";
4545 if (recipient
== NULL
)
4547 if (error_handling
== ERRORS_STDERR
)
4549 fprintf(stderr
, "exim: bad recipient address \"%s\": %s\n",
4550 string_printing(list
[i
]), errmess
);
4551 exim_exit(EXIT_FAILURE
);
4557 eblock
.text1
= string_printing(list
[i
]);
4558 eblock
.text2
= errmess
;
4560 moan_to_sender(ERRMESS_BADARGADDRESS
, &eblock
, NULL
, stdin
, TRUE
)?
4561 errors_sender_rc
: EXIT_FAILURE
;
4565 receive_add_recipient(recipient
, -1);
4568 while (*(++s
) != 0 && (*s
== ',' || isspace(*s
)));
4572 /* Show the recipients when debugging */
4577 if (sender_address
!= NULL
) debug_printf("Sender: %s\n", sender_address
);
4578 if (recipients_list
!= NULL
)
4580 debug_printf("Recipients:\n");
4581 for (i
= 0; i
< recipients_count
; i
++)
4582 debug_printf(" %s\n", recipients_list
[i
].address
);
4586 /* Read the data for the message. If filter_test is not FTEST_NONE, this
4587 will just read the headers for the message, and not write anything onto the
4590 message_ended
= END_NOTENDED
;
4591 more
= receive_msg(extract_recipients
);
4593 /* more is always FALSE here (not SMTP message) when reading a message
4594 for real; when reading the headers of a message for filter testing,
4595 it is TRUE if the headers were terminated by '.' and FALSE otherwise. */
4597 if (message_id
[0] == 0) exim_exit(EXIT_FAILURE
);
4598 } /* Non-SMTP message reception */
4600 /* If this is a filter testing run, there are headers in store, but
4601 no message on the spool. Run the filtering code in testing mode, setting
4602 the domain to the qualify domain and the local part to the current user,
4603 unless they have been set by options. The prefix and suffix are left unset
4604 unless specified. The the return path is set to to the sender unless it has
4605 already been set from a return-path header in the message. */
4607 if (filter_test
!= FTEST_NONE
)
4609 deliver_domain
= (ftest_domain
!= NULL
)?
4610 ftest_domain
: qualify_domain_recipient
;
4611 deliver_domain_orig
= deliver_domain
;
4612 deliver_localpart
= (ftest_localpart
!= NULL
)?
4613 ftest_localpart
: originator_login
;
4614 deliver_localpart_orig
= deliver_localpart
;
4615 deliver_localpart_prefix
= ftest_prefix
;
4616 deliver_localpart_suffix
= ftest_suffix
;
4617 deliver_home
= originator_home
;
4619 if (return_path
== NULL
)
4621 printf("Return-path copied from sender\n");
4622 return_path
= string_copy(sender_address
);
4626 printf("Return-path = %s\n", (return_path
[0] == 0)? US
"<>" : return_path
);
4628 printf("Sender = %s\n", (sender_address
[0] == 0)? US
"<>" : sender_address
);
4630 receive_add_recipient(
4631 string_sprintf("%s%s%s@%s",
4632 (ftest_prefix
== NULL
)? US
"" : ftest_prefix
,
4634 (ftest_suffix
== NULL
)? US
"" : ftest_suffix
,
4635 deliver_domain
), -1);
4637 printf("Recipient = %s\n", recipients_list
[0].address
);
4638 if (ftest_prefix
!= NULL
) printf("Prefix = %s\n", ftest_prefix
);
4639 if (ftest_suffix
!= NULL
) printf("Suffix = %s\n", ftest_suffix
);
4641 (void)chdir("/"); /* Get away from wherever the user is running this from */
4643 /* Now we run either a system filter test, or a user filter test, or both.
4644 In the latter case, headers added by the system filter will persist and be
4645 available to the user filter. We need to copy the filter variables
4648 if ((filter_test
& FTEST_SYSTEM
) != 0)
4650 if (!filter_runtest(filter_sfd
, filter_test_sfile
, TRUE
, more
))
4651 exim_exit(EXIT_FAILURE
);
4654 memcpy(filter_sn
, filter_n
, sizeof(filter_sn
));
4656 if ((filter_test
& FTEST_USER
) != 0)
4658 if (!filter_runtest(filter_ufd
, filter_test_ufile
, FALSE
, more
))
4659 exim_exit(EXIT_FAILURE
);
4662 exim_exit(EXIT_SUCCESS
);
4665 /* Else act on the result of message reception. We should not get here unless
4666 message_id[0] is non-zero. If queue_only is set, local_queue_only will be
4667 TRUE. If it is not, check on the number of messages received in this
4668 connection. If that's OK and queue_only_load is set, check that the load
4669 average is below it. If it is not, set local_queue_only TRUE. Note that it
4670 then remains this way for any subsequent messages on the same SMTP connection.
4671 This is a deliberate choice; even though the load average may fall, it
4672 doesn't seem right to deliver later messages on the same call when not
4673 delivering earlier ones. */
4675 if (!local_queue_only
)
4677 if (smtp_accept_queue_per_connection
> 0 &&
4678 receive_messagecount
> smtp_accept_queue_per_connection
)
4680 local_queue_only
= TRUE
;
4681 queue_only_reason
= 2;
4683 else if (queue_only_load
>= 0)
4685 local_queue_only
= (load_average
= os_getloadavg()) > queue_only_load
;
4686 if (local_queue_only
) queue_only_reason
= 3;
4690 /* If running as an MUA wrapper, all queueing options and freezing options
4694 local_queue_only
= queue_only_policy
= deliver_freeze
= FALSE
;
4696 /* Log the queueing here, when it will get a message id attached, but
4697 not if queue_only is set (case 0). Case 1 doesn't happen here (too many
4700 if (local_queue_only
) switch(queue_only_reason
)
4703 log_write(L_delay_delivery
,
4704 LOG_MAIN
, "no immediate delivery: more than %d messages "
4705 "received in one connection", smtp_accept_queue_per_connection
);
4709 log_write(L_delay_delivery
,
4710 LOG_MAIN
, "no immediate delivery: load average %.2f",
4711 (double)load_average
/1000.0);
4715 /* Else do the delivery unless the ACL or local_scan() called for queue only
4716 or froze the message. Always deliver in a separate process. A fork failure is
4717 not a disaster, as the delivery will eventually happen on a subsequent queue
4718 run. The search cache must be tidied before the fork, as the parent will
4719 do it before exiting. The child will trigger a lookup failure and
4720 thereby defer the delivery if it tries to use (for example) a cached ldap
4721 connection that the parent has called unbind on. */
4723 else if (!queue_only_policy
&& !deliver_freeze
)
4728 if ((pid
= fork()) == 0)
4731 close_unwanted(); /* Close unwanted file descriptors and TLS */
4732 exim_nullstd(); /* Ensure std{in,out,err} exist */
4734 /* Occasionally in the test harness we don't have synchronous delivery
4735 set (can happen with bounces). In that case, let the old process finish
4736 before continuing, to keep the debug output the same. */
4738 if (running_in_test_harness
&& !synchronous_delivery
) millisleep(100);
4740 /* Re-exec Exim if we need to regain privilege (note: in mua_wrapper
4741 mode, deliver_drop_privilege is forced TRUE). */
4743 if (geteuid() != root_uid
&& !deliver_drop_privilege
&& !unprivileged
)
4745 (void)child_exec_exim(CEE_EXEC_EXIT
, FALSE
, NULL
, FALSE
, 2, US
"-Mc",
4747 /* Control does not return here. */
4750 /* No need to re-exec */
4752 rc
= deliver_message(message_id
, FALSE
, FALSE
);
4754 _exit((!mua_wrapper
|| rc
== DELIVER_MUA_SUCCEEDED
)?
4755 EXIT_SUCCESS
: EXIT_FAILURE
);
4760 log_write(0, LOG_MAIN
|LOG_PANIC
, "failed to fork automatic delivery "
4761 "process: %s", strerror(errno
));
4764 /* In the parent, wait if synchronous delivery is required. This will
4765 always be the case in MUA wrapper mode. */
4767 else if (synchronous_delivery
)
4770 while (wait(&status
) != pid
);
4771 if ((status
& 0x00ff) != 0)
4772 log_write(0, LOG_MAIN
|LOG_PANIC
,
4773 "process %d crashed with signal %d while delivering %s",
4774 (int)pid
, status
& 0x00ff, message_id
);
4775 if (mua_wrapper
&& (status
& 0xffff) != 0) exim_exit(EXIT_FAILURE
);
4779 /* The loop will repeat if more is TRUE. If we do not know know that the OS
4780 automatically reaps children (see comments above the loop), clear away any
4781 finished subprocesses here, in case there are lots of messages coming in
4782 from the same source. */
4784 #ifndef SIG_IGN_WORKS
4785 while (waitpid(-1, NULL
, WNOHANG
) > 0);
4789 exim_exit(EXIT_SUCCESS
); /* Never returns */
4790 return 0; /* To stop compiler warning */