Add support for -bP config
[exim.git] / src / src / exim.c
CommitLineData
059ec3d9
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1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
3386088d 5/* Copyright (c) University of Cambridge 1995 - 2015 */
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6/* See the file NOTICE for conditions of use and distribution. */
7
8
9/* The main function: entry point, initialization, and high-level control.
10Also a few functions that don't naturally fit elsewhere. */
11
12
13#include "exim.h"
14
f797c123
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15#ifdef USE_GNUTLS
16# include <gnutls/gnutls.h>
17# if GNUTLS_VERSION_NUMBER < 0x030103 && !defined(DISABLE_OCSP)
18# define DISABLE_OCSP
19# endif
20#endif
21
6545de78
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22extern void init_lookup_list(void);
23
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24
25
26/*************************************************
27* Function interface to store functions *
28*************************************************/
29
30/* We need some real functions to pass to the PCRE regular expression library
31for store allocation via Exim's store manager. The normal calls are actually
32macros that pass over location information to make tracing easier. These
33functions just interface to the standard macro calls. A good compiler will
34optimize out the tail recursion and so not make them too expensive. There
35are two sets of functions; one for use when we want to retain the compiled
36regular expression for a long time; the other for short-term use. */
37
38static void *
39function_store_get(size_t size)
40{
41return store_get((int)size);
42}
43
44static void
45function_dummy_free(void *block) { block = block; }
46
47static void *
48function_store_malloc(size_t size)
49{
50return store_malloc((int)size);
51}
52
53static void
54function_store_free(void *block)
55{
56store_free(block);
57}
58
59
60
61
62/*************************************************
98a90c36
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63* Enums for cmdline interface *
64*************************************************/
65
66enum commandline_info { CMDINFO_NONE=0,
36a3ae5f 67 CMDINFO_HELP, CMDINFO_SIEVE, CMDINFO_DSCP };
98a90c36
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68
69
70
71
72/*************************************************
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73* Compile regular expression and panic on fail *
74*************************************************/
75
76/* This function is called when failure to compile a regular expression leads
77to a panic exit. In other cases, pcre_compile() is called directly. In many
78cases where this function is used, the results of the compilation are to be
79placed in long-lived store, so we temporarily reset the store management
80functions that PCRE uses if the use_malloc flag is set.
81
82Argument:
83 pattern the pattern to compile
84 caseless TRUE if caseless matching is required
85 use_malloc TRUE if compile into malloc store
86
87Returns: pointer to the compiled pattern
88*/
89
90const pcre *
476be7e2 91regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
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92{
93int offset;
94int options = PCRE_COPT;
95const pcre *yield;
96const uschar *error;
97if (use_malloc)
98 {
99 pcre_malloc = function_store_malloc;
100 pcre_free = function_store_free;
101 }
102if (caseless) options |= PCRE_CASELESS;
476be7e2 103yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
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104pcre_malloc = function_store_get;
105pcre_free = function_dummy_free;
106if (yield == NULL)
107 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
108 "%s at offset %d while compiling %s", error, offset, pattern);
109return yield;
110}
111
112
113
114
115/*************************************************
116* Execute regular expression and set strings *
117*************************************************/
118
119/* This function runs a regular expression match, and sets up the pointers to
120the matched substrings.
121
122Arguments:
123 re the compiled expression
124 subject the subject string
125 options additional PCRE options
126 setup if < 0 do full setup
127 if >= 0 setup from setup+1 onwards,
128 excluding the full matched string
129
130Returns: TRUE or FALSE
131*/
132
133BOOL
1dc92d5a 134regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
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135{
136int ovector[3*(EXPAND_MAXN+1)];
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137uschar * s = string_copy(subject); /* de-constifying */
138int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
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139 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
140BOOL yield = n >= 0;
141if (n == 0) n = EXPAND_MAXN + 1;
142if (yield)
143 {
144 int nn;
145 expand_nmax = (setup < 0)? 0 : setup + 1;
146 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
147 {
1dc92d5a 148 expand_nstring[expand_nmax] = s + ovector[nn];
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149 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
150 }
151 expand_nmax--;
152 }
153return yield;
154}
155
156
157
158
159/*************************************************
921b12ca
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160* Set up processing details *
161*************************************************/
162
163/* Save a text string for dumping when SIGUSR1 is received.
164Do checks for overruns.
165
166Arguments: format and arguments, as for printf()
167Returns: nothing
168*/
169
170void
171set_process_info(const char *format, ...)
172{
173int len;
174va_list ap;
175sprintf(CS process_info, "%5d ", (int)getpid());
176len = Ustrlen(process_info);
177va_start(ap, format);
178if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
179 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
180len = Ustrlen(process_info);
181process_info[len+0] = '\n';
182process_info[len+1] = '\0';
183process_info_len = len + 1;
184DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
185va_end(ap);
186}
187
188
189
190
191/*************************************************
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192* Handler for SIGUSR1 *
193*************************************************/
194
195/* SIGUSR1 causes any exim process to write to the process log details of
196what it is currently doing. It will only be used if the OS is capable of
197setting up a handler that causes automatic restarting of any system call
198that is in progress at the time.
199
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200This function takes care to be signal-safe.
201
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202Argument: the signal number (SIGUSR1)
203Returns: nothing
204*/
205
206static void
207usr1_handler(int sig)
208{
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209int fd;
210
211os_restarting_signal(sig, usr1_handler);
212
213fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
214if (fd < 0)
215 {
216 /* If we are already running as the Exim user, try to create it in the
217 current process (assuming spool_directory exists). Otherwise, if we are
218 root, do the creation in an exim:exim subprocess. */
219
220 int euid = geteuid();
221 if (euid == exim_uid)
222 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
223 else if (euid == root_uid)
224 fd = log_create_as_exim(process_log_path);
225 }
226
227/* If we are neither exim nor root, or if we failed to create the log file,
228give up. There is not much useful we can do with errors, since we don't want
229to disrupt whatever is going on outside the signal handler. */
230
231if (fd < 0) return;
232
2f21487f 233(void)write(fd, process_info, process_info_len);
921b12ca 234(void)close(fd);
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235}
236
237
238
239/*************************************************
240* Timeout handler *
241*************************************************/
242
243/* This handler is enabled most of the time that Exim is running. The handler
244doesn't actually get used unless alarm() has been called to set a timer, to
245place a time limit on a system call of some kind. When the handler is run, it
246re-enables itself.
247
248There are some other SIGALRM handlers that are used in special cases when more
249than just a flag setting is required; for example, when reading a message's
250input. These are normally set up in the code module that uses them, and the
251SIGALRM handler is reset to this one afterwards.
252
253Argument: the signal value (SIGALRM)
254Returns: nothing
255*/
256
257void
258sigalrm_handler(int sig)
259{
260sig = sig; /* Keep picky compilers happy */
261sigalrm_seen = TRUE;
262os_non_restarting_signal(SIGALRM, sigalrm_handler);
263}
264
265
266
267/*************************************************
268* Sleep for a fractional time interval *
269*************************************************/
270
271/* This function is called by millisleep() and exim_wait_tick() to wait for a
272period of time that may include a fraction of a second. The coding is somewhat
eb2c0248
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273tedious. We do not expect setitimer() ever to fail, but if it does, the process
274will wait for ever, so we panic in this instance. (There was a case of this
275when a bug in a function that calls milliwait() caused it to pass invalid data.
7086e875 276That's when I added the check. :-)
059ec3d9 277
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278We assume it to be not worth sleeping for under 100us; this value will
279require revisiting as hardware advances. This avoids the issue of
280a zero-valued timer setting meaning "never fire".
281
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282Argument: an itimerval structure containing the interval
283Returns: nothing
284*/
285
286static void
287milliwait(struct itimerval *itval)
288{
289sigset_t sigmask;
290sigset_t old_sigmask;
0f8ba377
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291
292if (itval->it_value.tv_usec < 100 && itval->it_value.tv_sec == 0)
293 return;
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294(void)sigemptyset(&sigmask); /* Empty mask */
295(void)sigaddset(&sigmask, SIGALRM); /* Add SIGALRM */
296(void)sigprocmask(SIG_BLOCK, &sigmask, &old_sigmask); /* Block SIGALRM */
7086e875 297if (setitimer(ITIMER_REAL, itval, NULL) < 0) /* Start timer */
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298 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
299 "setitimer() failed: %s", strerror(errno));
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300(void)sigfillset(&sigmask); /* All signals */
301(void)sigdelset(&sigmask, SIGALRM); /* Remove SIGALRM */
302(void)sigsuspend(&sigmask); /* Until SIGALRM */
303(void)sigprocmask(SIG_SETMASK, &old_sigmask, NULL); /* Restore mask */
304}
305
306
307
308
309/*************************************************
310* Millisecond sleep function *
311*************************************************/
312
313/* The basic sleep() function has a granularity of 1 second, which is too rough
314in some cases - for example, when using an increasing delay to slow down
315spammers.
316
317Argument: number of millseconds
318Returns: nothing
319*/
320
321void
322millisleep(int msec)
323{
324struct itimerval itval;
325itval.it_interval.tv_sec = 0;
326itval.it_interval.tv_usec = 0;
327itval.it_value.tv_sec = msec/1000;
328itval.it_value.tv_usec = (msec % 1000) * 1000;
329milliwait(&itval);
330}
331
332
333
334/*************************************************
335* Compare microsecond times *
336*************************************************/
337
338/*
339Arguments:
340 tv1 the first time
341 tv2 the second time
342
343Returns: -1, 0, or +1
344*/
345
346int
347exim_tvcmp(struct timeval *t1, struct timeval *t2)
348{
349if (t1->tv_sec > t2->tv_sec) return +1;
350if (t1->tv_sec < t2->tv_sec) return -1;
351if (t1->tv_usec > t2->tv_usec) return +1;
352if (t1->tv_usec < t2->tv_usec) return -1;
353return 0;
354}
355
356
357
358
359/*************************************************
360* Clock tick wait function *
361*************************************************/
362
363/* Exim uses a time + a pid to generate a unique identifier in two places: its
364message IDs, and in file names for maildir deliveries. Because some OS now
365re-use pids within the same second, sub-second times are now being used.
366However, for absolute certaintly, we must ensure the clock has ticked before
367allowing the relevant process to complete. At the time of implementation of
368this code (February 2003), the speed of processors is such that the clock will
369invariably have ticked already by the time a process has done its job. This
370function prepares for the time when things are faster - and it also copes with
371clocks that go backwards.
372
373Arguments:
374 then_tv A timeval which was used to create uniqueness; its usec field
375 has been rounded down to the value of the resolution.
376 We want to be sure the current time is greater than this.
377 resolution The resolution that was used to divide the microseconds
378 (1 for maildir, larger for message ids)
379
380Returns: nothing
381*/
382
383void
384exim_wait_tick(struct timeval *then_tv, int resolution)
385{
386struct timeval now_tv;
387long int now_true_usec;
388
389(void)gettimeofday(&now_tv, NULL);
390now_true_usec = now_tv.tv_usec;
391now_tv.tv_usec = (now_true_usec/resolution) * resolution;
392
393if (exim_tvcmp(&now_tv, then_tv) <= 0)
394 {
395 struct itimerval itval;
396 itval.it_interval.tv_sec = 0;
397 itval.it_interval.tv_usec = 0;
398 itval.it_value.tv_sec = then_tv->tv_sec - now_tv.tv_sec;
399 itval.it_value.tv_usec = then_tv->tv_usec + resolution - now_true_usec;
400
401 /* We know that, overall, "now" is less than or equal to "then". Therefore, a
402 negative value for the microseconds is possible only in the case when "now"
403 is more than a second less than "then". That means that itval.it_value.tv_sec
404 is greater than zero. The following correction is therefore safe. */
405
406 if (itval.it_value.tv_usec < 0)
407 {
408 itval.it_value.tv_usec += 1000000;
409 itval.it_value.tv_sec -= 1;
410 }
411
412 DEBUG(D_transport|D_receive)
413 {
414 if (!running_in_test_harness)
415 {
d0291a0a 416 debug_printf("tick check: " TIME_T_FMT ".%06lu " TIME_T_FMT ".%06lu\n",
7437665e
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417 then_tv->tv_sec, (long) then_tv->tv_usec,
418 now_tv.tv_sec, (long) now_tv.tv_usec);
d0291a0a
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419 debug_printf("waiting " TIME_T_FMT ".%06lu\n",
420 itval.it_value.tv_sec, (long) itval.it_value.tv_usec);
059ec3d9
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421 }
422 }
423
424 milliwait(&itval);
425 }
426}
427
428
429
430
431/*************************************************
2632889e
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432* Call fopen() with umask 777 and adjust mode *
433*************************************************/
434
435/* Exim runs with umask(0) so that files created with open() have the mode that
436is specified in the open() call. However, there are some files, typically in
437the spool directory, that are created with fopen(). They end up world-writeable
438if no precautions are taken. Although the spool directory is not accessible to
439the world, this is an untidiness. So this is a wrapper function for fopen()
440that sorts out the mode of the created file.
441
442Arguments:
443 filename the file name
444 options the fopen() options
445 mode the required mode
446
447Returns: the fopened FILE or NULL
448*/
449
450FILE *
1ba28e2b 451modefopen(const uschar *filename, const char *options, mode_t mode)
2632889e 452{
67d175de
PH
453mode_t saved_umask = umask(0777);
454FILE *f = Ufopen(filename, options);
455(void)umask(saved_umask);
2632889e
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456if (f != NULL) (void)fchmod(fileno(f), mode);
457return f;
458}
459
460
461
462
463/*************************************************
059ec3d9
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464* Ensure stdin, stdout, and stderr exist *
465*************************************************/
466
467/* Some operating systems grumble if an exec() happens without a standard
468input, output, and error (fds 0, 1, 2) being defined. The worry is that some
469file will be opened and will use these fd values, and then some other bit of
470code will assume, for example, that it can write error messages to stderr.
471This function ensures that fds 0, 1, and 2 are open if they do not already
472exist, by connecting them to /dev/null.
473
474This function is also used to ensure that std{in,out,err} exist at all times,
475so that if any library that Exim calls tries to use them, it doesn't crash.
476
477Arguments: None
478Returns: Nothing
479*/
480
481void
482exim_nullstd(void)
483{
484int i;
485int devnull = -1;
486struct stat statbuf;
487for (i = 0; i <= 2; i++)
488 {
489 if (fstat(i, &statbuf) < 0 && errno == EBADF)
490 {
491 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
492 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
493 string_open_failed(errno, "/dev/null"));
1fe64dcc 494 if (devnull != i) (void)dup2(devnull, i);
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495 }
496 }
1fe64dcc 497if (devnull > 2) (void)close(devnull);
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498}
499
500
501
502
503/*************************************************
504* Close unwanted file descriptors for delivery *
505*************************************************/
506
507/* This function is called from a new process that has been forked to deliver
508an incoming message, either directly, or using exec.
509
510We want any smtp input streams to be closed in this new process. However, it
511has been observed that using fclose() here causes trouble. When reading in -bS
512input, duplicate copies of messages have been seen. The files will be sharing a
513file pointer with the parent process, and it seems that fclose() (at least on
514some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
515least sometimes. Hence we go for closing the underlying file descriptors.
516
517If TLS is active, we want to shut down the TLS library, but without molesting
518the parent's SSL connection.
519
520For delivery of a non-SMTP message, we want to close stdin and stdout (and
521stderr unless debugging) because the calling process might have set them up as
522pipes and be waiting for them to close before it waits for the submission
523process to terminate. If they aren't closed, they hold up the calling process
524until the initial delivery process finishes, which is not what we want.
525
526Exception: We do want it for synchronous delivery!
527
528And notwithstanding all the above, if D_resolver is set, implying resolver
529debugging, leave stdout open, because that's where the resolver writes its
530debugging output.
531
532When we close stderr (which implies we've also closed stdout), we also get rid
533of any controlling terminal.
534
535Arguments: None
536Returns: Nothing
537*/
538
539static void
540close_unwanted(void)
541{
542if (smtp_input)
543 {
544 #ifdef SUPPORT_TLS
a400eccf 545 tls_close(TRUE, FALSE); /* Shut down the TLS library */
059ec3d9 546 #endif
1fe64dcc
PH
547 (void)close(fileno(smtp_in));
548 (void)close(fileno(smtp_out));
059ec3d9
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549 smtp_in = NULL;
550 }
551else
552 {
1fe64dcc
PH
553 (void)close(0); /* stdin */
554 if ((debug_selector & D_resolver) == 0) (void)close(1); /* stdout */
555 if (debug_selector == 0) /* stderr */
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556 {
557 if (!synchronous_delivery)
558 {
1fe64dcc 559 (void)close(2);
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560 log_stderr = NULL;
561 }
562 (void)setsid();
563 }
564 }
565}
566
567
568
569
570/*************************************************
571* Set uid and gid *
572*************************************************/
573
574/* This function sets a new uid and gid permanently, optionally calling
575initgroups() to set auxiliary groups. There are some special cases when running
576Exim in unprivileged modes. In these situations the effective uid will not be
577root; if we already have the right effective uid/gid, and don't need to
578initialize any groups, leave things as they are.
579
580Arguments:
581 uid the uid
582 gid the gid
583 igflag TRUE if initgroups() wanted
584 msg text to use in debugging output and failure log
585
586Returns: nothing; bombs out on failure
587*/
588
589void
590exim_setugid(uid_t uid, gid_t gid, BOOL igflag, uschar *msg)
591{
592uid_t euid = geteuid();
593gid_t egid = getegid();
594
595if (euid == root_uid || euid != uid || egid != gid || igflag)
596 {
597 /* At least one OS returns +1 for initgroups failure, so just check for
598 non-zero. */
599
600 if (igflag)
601 {
602 struct passwd *pw = getpwuid(uid);
603 if (pw != NULL)
604 {
605 if (initgroups(pw->pw_name, gid) != 0)
606 log_write(0,LOG_MAIN|LOG_PANIC_DIE,"initgroups failed for uid=%ld: %s",
607 (long int)uid, strerror(errno));
608 }
609 else log_write(0, LOG_MAIN|LOG_PANIC_DIE, "cannot run initgroups(): "
610 "no passwd entry for uid=%ld", (long int)uid);
611 }
612
613 if (setgid(gid) < 0 || setuid(uid) < 0)
614 {
615 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "unable to set gid=%ld or uid=%ld "
616 "(euid=%ld): %s", (long int)gid, (long int)uid, (long int)euid, msg);
617 }
618 }
619
620/* Debugging output included uid/gid and all groups */
621
622DEBUG(D_uid)
623 {
cd59ab18 624 int group_count, save_errno;
059ec3d9
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625 gid_t group_list[NGROUPS_MAX];
626 debug_printf("changed uid/gid: %s\n uid=%ld gid=%ld pid=%ld\n", msg,
627 (long int)geteuid(), (long int)getegid(), (long int)getpid());
628 group_count = getgroups(NGROUPS_MAX, group_list);
cd59ab18 629 save_errno = errno;
059ec3d9
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630 debug_printf(" auxiliary group list:");
631 if (group_count > 0)
632 {
633 int i;
634 for (i = 0; i < group_count; i++) debug_printf(" %d", (int)group_list[i]);
635 }
cd59ab18
PP
636 else if (group_count < 0)
637 debug_printf(" <error: %s>", strerror(save_errno));
059ec3d9
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638 else debug_printf(" <none>");
639 debug_printf("\n");
640 }
641}
642
643
644
645
646/*************************************************
647* Exit point *
648*************************************************/
649
650/* Exim exits via this function so that it always clears up any open
651databases.
652
653Arguments:
654 rc return code
655
656Returns: does not return
657*/
658
659void
660exim_exit(int rc)
661{
662search_tidyup();
663DEBUG(D_any)
664 debug_printf(">>>>>>>>>>>>>>>> Exim pid=%d terminating with rc=%d "
665 ">>>>>>>>>>>>>>>>\n", (int)getpid(), rc);
666exit(rc);
667}
668
669
670
671
672/*************************************************
673* Extract port from host address *
674*************************************************/
675
676/* Called to extract the port from the values given to -oMa and -oMi.
b90c388a
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677It also checks the syntax of the address, and terminates it before the
678port data when a port is extracted.
059ec3d9
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679
680Argument:
681 address the address, with possible port on the end
682
683Returns: the port, or zero if there isn't one
684 bombs out on a syntax error
685*/
686
687static int
688check_port(uschar *address)
689{
7cd1141b 690int port = host_address_extract_port(address);
8e669ac1 691if (string_is_ip_address(address, NULL) == 0)
059ec3d9
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692 {
693 fprintf(stderr, "exim abandoned: \"%s\" is not an IP address\n", address);
694 exit(EXIT_FAILURE);
695 }
696return port;
697}
698
699
700
701/*************************************************
702* Test/verify an address *
703*************************************************/
704
705/* This function is called by the -bv and -bt code. It extracts a working
706address from a full RFC 822 address. This isn't really necessary per se, but it
707has the effect of collapsing source routes.
708
709Arguments:
710 s the address string
711 flags flag bits for verify_address()
712 exit_value to be set for failures
713
a5a28604 714Returns: nothing
059ec3d9
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715*/
716
717static void
718test_address(uschar *s, int flags, int *exit_value)
719{
720int start, end, domain;
721uschar *parse_error = NULL;
722uschar *address = parse_extract_address(s, &parse_error, &start, &end, &domain,
723 FALSE);
724if (address == NULL)
725 {
726 fprintf(stdout, "syntax error: %s\n", parse_error);
727 *exit_value = 2;
728 }
729else
730 {
731 int rc = verify_address(deliver_make_addr(address,TRUE), stdout, flags, -1,
4deaf07d 732 -1, -1, NULL, NULL, NULL);
059ec3d9
PH
733 if (rc == FAIL) *exit_value = 2;
734 else if (rc == DEFER && *exit_value == 0) *exit_value = 1;
735 }
736}
737
738
739
740/*************************************************
059ec3d9
PH
741* Show supported features *
742*************************************************/
743
4b2241d2
PP
744/* This function is called for -bV/--version and for -d to output the optional
745features of the current Exim binary.
059ec3d9
PH
746
747Arguments: a FILE for printing
748Returns: nothing
749*/
750
751static void
752show_whats_supported(FILE *f)
753{
44bbabb5
PP
754 auth_info *authi;
755
059ec3d9
PH
756#ifdef DB_VERSION_STRING
757fprintf(f, "Berkeley DB: %s\n", DB_VERSION_STRING);
758#elif defined(BTREEVERSION) && defined(HASHVERSION)
759 #ifdef USE_DB
760 fprintf(f, "Probably Berkeley DB version 1.8x (native mode)\n");
761 #else
762 fprintf(f, "Probably Berkeley DB version 1.8x (compatibility mode)\n");
763 #endif
764#elif defined(_DBM_RDONLY) || defined(dbm_dirfno)
765fprintf(f, "Probably ndbm\n");
766#elif defined(USE_TDB)
767fprintf(f, "Using tdb\n");
768#else
769 #ifdef USE_GDBM
770 fprintf(f, "Probably GDBM (native mode)\n");
771 #else
772 fprintf(f, "Probably GDBM (compatibility mode)\n");
773 #endif
774#endif
775
776fprintf(f, "Support for:");
9cec981f
PH
777#ifdef SUPPORT_CRYPTEQ
778 fprintf(f, " crypteq");
779#endif
059ec3d9
PH
780#if HAVE_ICONV
781 fprintf(f, " iconv()");
782#endif
783#if HAVE_IPV6
784 fprintf(f, " IPv6");
785#endif
79378e0f
PH
786#ifdef HAVE_SETCLASSRESOURCES
787 fprintf(f, " use_setclassresources");
929ba01c 788#endif
059ec3d9
PH
789#ifdef SUPPORT_PAM
790 fprintf(f, " PAM");
791#endif
792#ifdef EXIM_PERL
793 fprintf(f, " Perl");
794#endif
1a46a8c5
PH
795#ifdef EXPAND_DLFUNC
796 fprintf(f, " Expand_dlfunc");
797#endif
059ec3d9
PH
798#ifdef USE_TCP_WRAPPERS
799 fprintf(f, " TCPwrappers");
800#endif
801#ifdef SUPPORT_TLS
802 #ifdef USE_GNUTLS
803 fprintf(f, " GnuTLS");
804 #else
805 fprintf(f, " OpenSSL");
806 #endif
807#endif
b2f5a032
PH
808#ifdef SUPPORT_TRANSLATE_IP_ADDRESS
809 fprintf(f, " translate_ip_address");
810#endif
f174f16e
PH
811#ifdef SUPPORT_MOVE_FROZEN_MESSAGES
812 fprintf(f, " move_frozen_messages");
813#endif
8523533c
TK
814#ifdef WITH_CONTENT_SCAN
815 fprintf(f, " Content_Scanning");
816#endif
80a47a2c
TK
817#ifndef DISABLE_DKIM
818 fprintf(f, " DKIM");
819#endif
8523533c
TK
820#ifdef WITH_OLD_DEMIME
821 fprintf(f, " Old_Demime");
822#endif
ef1bbb27
HSHR
823#ifndef DISABLE_DNSSEC
824 fprintf(f, " DNSSEC");
825#endif
4d832da1
TL
826#ifndef DISABLE_PRDR
827 fprintf(f, " PRDR");
828#endif
f2de3a33
JH
829#ifndef DISABLE_OCSP
830 fprintf(f, " OCSP");
831#endif
8523533c
TK
832#ifdef EXPERIMENTAL_SPF
833 fprintf(f, " Experimental_SPF");
834#endif
835#ifdef EXPERIMENTAL_SRS
836 fprintf(f, " Experimental_SRS");
837#endif
838#ifdef EXPERIMENTAL_BRIGHTMAIL
839 fprintf(f, " Experimental_Brightmail");
840#endif
043b1248
JH
841#ifdef EXPERIMENTAL_DANE
842 fprintf(f, " Experimental_DANE");
843#endif
6a8f9482
TK
844#ifdef EXPERIMENTAL_DCC
845 fprintf(f, " Experimental_DCC");
846#endif
4840604e
TL
847#ifdef EXPERIMENTAL_DMARC
848 fprintf(f, " Experimental_DMARC");
849#endif
895fbaf2
JH
850#ifdef EXPERIMENTAL_DSN_INFO
851 fprintf(f, " Experimental_DSN_info");
852#endif
853#ifdef EXPERIMENTAL_INTERNATIONAL
854 fprintf(f, " Experimental_International");
855#endif
930407fb
TL
856#ifdef EXPERIMENTAL_PROXY
857 fprintf(f, " Experimental_Proxy");
858#endif
774ef2d7
JH
859#ifdef EXPERIMENTAL_EVENT
860 fprintf(f, " Experimental_Event");
d68218c7 861#endif
9bdd29ad
TL
862#ifdef EXPERIMENTAL_REDIS
863 fprintf(f, " Experimental_Redis");
864#endif
7eb6c37c
JH
865#ifdef EXPERIMENTAL_SOCKS
866 fprintf(f, " Experimental_SOCKS");
867#endif
059ec3d9
PH
868fprintf(f, "\n");
869
e6d225ae
DW
870fprintf(f, "Lookups (built-in):");
871#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
059ec3d9
PH
872 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
873#endif
e6d225ae 874#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
059ec3d9
PH
875 fprintf(f, " cdb");
876#endif
e6d225ae 877#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
4a6a987a 878 fprintf(f, " dbm dbmjz dbmnz");
059ec3d9 879#endif
e6d225ae 880#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
059ec3d9
PH
881 fprintf(f, " dnsdb");
882#endif
e6d225ae 883#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
059ec3d9
PH
884 fprintf(f, " dsearch");
885#endif
e6d225ae 886#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
059ec3d9
PH
887 fprintf(f, " ibase");
888#endif
e6d225ae 889#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
059ec3d9
PH
890 fprintf(f, " ldap ldapdn ldapm");
891#endif
e6d225ae 892#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
059ec3d9
PH
893 fprintf(f, " mysql");
894#endif
e6d225ae 895#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
059ec3d9
PH
896 fprintf(f, " nis nis0");
897#endif
e6d225ae 898#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
059ec3d9
PH
899 fprintf(f, " nisplus");
900#endif
e6d225ae 901#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
059ec3d9
PH
902 fprintf(f, " oracle");
903#endif
e6d225ae 904#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
059ec3d9
PH
905 fprintf(f, " passwd");
906#endif
e6d225ae 907#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
059ec3d9
PH
908 fprintf(f, " pgsql");
909#endif
e6d225ae 910#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
13b685f9
PH
911 fprintf(f, " sqlite");
912#endif
e6d225ae 913#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
059ec3d9
PH
914 fprintf(f, " testdb");
915#endif
e6d225ae 916#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
059ec3d9
PH
917 fprintf(f, " whoson");
918#endif
919fprintf(f, "\n");
920
921fprintf(f, "Authenticators:");
922#ifdef AUTH_CRAM_MD5
923 fprintf(f, " cram_md5");
924#endif
925#ifdef AUTH_CYRUS_SASL
926 fprintf(f, " cyrus_sasl");
927#endif
14aa5a05
PH
928#ifdef AUTH_DOVECOT
929 fprintf(f, " dovecot");
930#endif
44bbabb5
PP
931#ifdef AUTH_GSASL
932 fprintf(f, " gsasl");
933#endif
dde3daac
PP
934#ifdef AUTH_HEIMDAL_GSSAPI
935 fprintf(f, " heimdal_gssapi");
936#endif
059ec3d9
PH
937#ifdef AUTH_PLAINTEXT
938 fprintf(f, " plaintext");
939#endif
940#ifdef AUTH_SPA
941 fprintf(f, " spa");
942#endif
b3ef41c9
JH
943#ifdef AUTH_TLS
944 fprintf(f, " tls");
945#endif
059ec3d9
PH
946fprintf(f, "\n");
947
948fprintf(f, "Routers:");
949#ifdef ROUTER_ACCEPT
950 fprintf(f, " accept");
951#endif
952#ifdef ROUTER_DNSLOOKUP
953 fprintf(f, " dnslookup");
954#endif
955#ifdef ROUTER_IPLITERAL
956 fprintf(f, " ipliteral");
957#endif
958#ifdef ROUTER_IPLOOKUP
959 fprintf(f, " iplookup");
960#endif
961#ifdef ROUTER_MANUALROUTE
962 fprintf(f, " manualroute");
963#endif
964#ifdef ROUTER_QUERYPROGRAM
965 fprintf(f, " queryprogram");
966#endif
967#ifdef ROUTER_REDIRECT
968 fprintf(f, " redirect");
969#endif
970fprintf(f, "\n");
971
972fprintf(f, "Transports:");
973#ifdef TRANSPORT_APPENDFILE
974 fprintf(f, " appendfile");
975 #ifdef SUPPORT_MAILDIR
976 fprintf(f, "/maildir");
977 #endif
978 #ifdef SUPPORT_MAILSTORE
979 fprintf(f, "/mailstore");
980 #endif
981 #ifdef SUPPORT_MBX
982 fprintf(f, "/mbx");
983 #endif
984#endif
985#ifdef TRANSPORT_AUTOREPLY
986 fprintf(f, " autoreply");
987#endif
988#ifdef TRANSPORT_LMTP
989 fprintf(f, " lmtp");
990#endif
991#ifdef TRANSPORT_PIPE
992 fprintf(f, " pipe");
993#endif
994#ifdef TRANSPORT_SMTP
995 fprintf(f, " smtp");
996#endif
997fprintf(f, "\n");
998
999if (fixed_never_users[0] > 0)
1000 {
1001 int i;
1002 fprintf(f, "Fixed never_users: ");
1003 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1004 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1005 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1006 }
21c28500 1007
73a46702 1008fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 1009
6545de78
PP
1010/* Everything else is details which are only worth reporting when debugging.
1011Perhaps the tls_version_report should move into this too. */
1012DEBUG(D_any) do {
1013
1014 int i;
1015
b3c261f7
PP
1016/* clang defines __GNUC__ (at least, for me) so test for it first */
1017#if defined(__clang__)
1018 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1019#elif defined(__GNUC__)
1020 fprintf(f, "Compiler: GCC [%s]\n",
1021# ifdef __VERSION__
1022 __VERSION__
1023# else
1024 "? unknown version ?"
1025# endif
1026 );
1027#else
1028 fprintf(f, "Compiler: <unknown>\n");
1029#endif
1030
754a0503
PP
1031#ifdef SUPPORT_TLS
1032 tls_version_report(f);
1033#endif
b04be5e7
JH
1034#ifdef EXPERIMENTAL_INTERNATIONAL
1035 utf8_version_report(f);
1036#endif
754a0503 1037
fc362fc5
JH
1038 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1039 if (authi->version_report)
44bbabb5 1040 (*authi->version_report)(f);
6545de78 1041
decd95cb 1042 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1043 characters; unless it's an ancient version of PCRE in which case it
1044 is not defined. */
1045#ifndef PCRE_PRERELEASE
1046#define PCRE_PRERELEASE
1047#endif
1048#define QUOTE(X) #X
1049#define EXPAND_AND_QUOTE(X) QUOTE(X)
6545de78
PP
1050 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1051 " Runtime: %s\n",
1052 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1053 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1054 pcre_version());
6475bd82
PP
1055#undef QUOTE
1056#undef EXPAND_AND_QUOTE
6545de78
PP
1057
1058 init_lookup_list();
1059 for (i = 0; i < lookup_list_count; i++)
6545de78
PP
1060 if (lookup_list[i]->version_report)
1061 lookup_list[i]->version_report(f);
6545de78 1062
b70d2586
PP
1063#ifdef WHITELIST_D_MACROS
1064 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1065#else
1066 fprintf(f, "WHITELIST_D_MACROS unset\n");
1067#endif
1068#ifdef TRUSTED_CONFIG_LIST
1069 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1070#else
1071 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1072#endif
1073
6545de78 1074} while (0);
059ec3d9
PH
1075}
1076
1077
98a90c36
PP
1078/*************************************************
1079* Show auxiliary information about Exim *
1080*************************************************/
1081
1082static void
1083show_exim_information(enum commandline_info request, FILE *stream)
1084{
1085const uschar **pp;
1086
1087switch(request)
1088 {
1089 case CMDINFO_NONE:
1090 fprintf(stream, "Oops, something went wrong.\n");
1091 return;
1092 case CMDINFO_HELP:
1093 fprintf(stream,
1094"The -bI: flag takes a string indicating which information to provide.\n"
1095"If the string is not recognised, you'll get this help (on stderr).\n"
1096"\n"
1097" exim -bI:help this information\n"
36a3ae5f 1098" exim -bI:dscp dscp value keywords known\n"
98a90c36
PP
1099" exim -bI:sieve list of supported sieve extensions, one per line.\n"
1100);
1101 return;
1102 case CMDINFO_SIEVE:
1103 for (pp = exim_sieve_extension_list; *pp; ++pp)
1104 fprintf(stream, "%s\n", *pp);
1105 return;
36a3ae5f
PP
1106 case CMDINFO_DSCP:
1107 dscp_list_to_stream(stream);
1108 return;
98a90c36
PP
1109 }
1110}
059ec3d9
PH
1111
1112
1113/*************************************************
1114* Quote a local part *
1115*************************************************/
1116
1117/* This function is used when a sender address or a From: or Sender: header
1118line is being created from the caller's login, or from an authenticated_id. It
1119applies appropriate quoting rules for a local part.
1120
1121Argument: the local part
1122Returns: the local part, quoted if necessary
1123*/
1124
1125uschar *
1126local_part_quote(uschar *lpart)
1127{
1128BOOL needs_quote = FALSE;
1129int size, ptr;
1130uschar *yield;
1131uschar *t;
1132
1133for (t = lpart; !needs_quote && *t != 0; t++)
1134 {
1135 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1136 (*t != '.' || t == lpart || t[1] == 0);
1137 }
1138
1139if (!needs_quote) return lpart;
1140
1141size = ptr = 0;
1142yield = string_cat(NULL, &size, &ptr, US"\"", 1);
1143
1144for (;;)
1145 {
1146 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1147 if (nq == NULL)
1148 {
1149 yield = string_cat(yield, &size, &ptr, lpart, Ustrlen(lpart));
1150 break;
1151 }
1152 yield = string_cat(yield, &size, &ptr, lpart, nq - lpart);
1153 yield = string_cat(yield, &size, &ptr, US"\\", 1);
1154 yield = string_cat(yield, &size, &ptr, nq, 1);
1155 lpart = nq + 1;
1156 }
1157
1158yield = string_cat(yield, &size, &ptr, US"\"", 1);
1159yield[ptr] = 0;
1160return yield;
1161}
1162
1163
1164
1165#ifdef USE_READLINE
1166/*************************************************
1167* Load readline() functions *
1168*************************************************/
1169
1170/* This function is called from testing executions that read data from stdin,
1171but only when running as the calling user. Currently, only -be does this. The
1172function loads the readline() function library and passes back the functions.
1173On some systems, it needs the curses library, so load that too, but try without
1174it if loading fails. All this functionality has to be requested at build time.
1175
1176Arguments:
1177 fn_readline_ptr pointer to where to put the readline pointer
1178 fn_addhist_ptr pointer to where to put the addhistory function
1179
1180Returns: the dlopen handle or NULL on failure
1181*/
1182
1183static void *
1ba28e2b
PP
1184set_readline(char * (**fn_readline_ptr)(const char *),
1185 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1186{
1187void *dlhandle;
e12f8c32 1188void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1189
e12f8c32 1190dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
059ec3d9
PH
1191if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1192
1193if (dlhandle != NULL)
1194 {
1ba28e2b
PP
1195 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1196 * char * readline (const char *prompt);
1197 * void add_history (const char *string);
1198 */
1199 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1200 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1201 }
1202else
1203 {
1204 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1205 }
1206
1207return dlhandle;
1208}
1209#endif
1210
1211
1212
1213/*************************************************
1214* Get a line from stdin for testing things *
1215*************************************************/
1216
1217/* This function is called when running tests that can take a number of lines
1218of input (for example, -be and -bt). It handles continuations and trailing
1219spaces. And prompting and a blank line output on eof. If readline() is in use,
1220the arguments are non-NULL and provide the relevant functions.
1221
1222Arguments:
1223 fn_readline readline function or NULL
1224 fn_addhist addhist function or NULL
1225
1226Returns: pointer to dynamic memory, or NULL at end of file
1227*/
1228
1229static uschar *
1ba28e2b 1230get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9
PH
1231{
1232int i;
1233int size = 0;
1234int ptr = 0;
1235uschar *yield = NULL;
1236
328895cc 1237if (fn_readline == NULL) { printf("> "); fflush(stdout); }
059ec3d9
PH
1238
1239for (i = 0;; i++)
1240 {
1241 uschar buffer[1024];
1242 uschar *p, *ss;
1243
1244 #ifdef USE_READLINE
1245 char *readline_line = NULL;
1246 if (fn_readline != NULL)
1247 {
1248 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1249 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1250 p = US readline_line;
1251 }
1252 else
1253 #endif
1254
1255 /* readline() not in use */
1256
1257 {
1258 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1259 p = buffer;
1260 }
1261
1262 /* Handle the line */
1263
1264 ss = p + (int)Ustrlen(p);
1265 while (ss > p && isspace(ss[-1])) ss--;
1266
1267 if (i > 0)
1268 {
1269 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1270 }
1271
1272 yield = string_cat(yield, &size, &ptr, p, ss - p);
1273
1274 #ifdef USE_READLINE
1275 if (fn_readline != NULL) free(readline_line);
1276 #endif
1277
1278 if (ss == p || yield[ptr-1] != '\\')
1279 {
1280 yield[ptr] = 0;
1281 break;
1282 }
1283 yield[--ptr] = 0;
1284 }
1285
1286if (yield == NULL) printf("\n");
1287return yield;
1288}
1289
1290
1291
1292/*************************************************
81ea09ca
NM
1293* Output usage information for the program *
1294*************************************************/
1295
1296/* This function is called when there are no recipients
1297 or a specific --help argument was added.
1298
1299Arguments:
1300 progname information on what name we were called by
1301
1302Returns: DOES NOT RETURN
1303*/
1304
1305static void
1306exim_usage(uschar *progname)
1307{
1308
1309/* Handle specific program invocation varients */
1310if (Ustrcmp(progname, US"-mailq") == 0)
1311 {
1312 fprintf(stderr,
e765a0f1 1313 "mailq - list the contents of the mail queue\n\n"
81ea09ca
NM
1314 "For a list of options, see the Exim documentation.\n");
1315 exit(EXIT_FAILURE);
1316 }
1317
1318/* Generic usage - we output this whatever happens */
1319fprintf(stderr,
1320 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1321 "not directly from a shell command line. Options and/or arguments control\n"
1322 "what it does when called. For a list of options, see the Exim documentation.\n");
1323
1324exit(EXIT_FAILURE);
1325}
1326
1327
1328
1329/*************************************************
a7cbbf50
PP
1330* Validate that the macros given are okay *
1331*************************************************/
1332
1333/* Typically, Exim will drop privileges if macros are supplied. In some
1334cases, we want to not do so.
1335
1336Arguments: none (macros is a global)
1337Returns: true if trusted, false otherwise
1338*/
1339
1340static BOOL
1341macros_trusted(void)
1342{
1343#ifdef WHITELIST_D_MACROS
1344macro_item *m;
1345uschar *whitelisted, *end, *p, **whites, **w;
1346int white_count, i, n;
1347size_t len;
1348BOOL prev_char_item, found;
1349#endif
1350
1351if (macros == NULL)
1352 return TRUE;
1353#ifndef WHITELIST_D_MACROS
1354return FALSE;
1355#else
1356
66581d1e
PP
1357/* We only trust -D overrides for some invoking users:
1358root, the exim run-time user, the optional config owner user.
1359I don't know why config-owner would be needed, but since they can own the
1360config files anyway, there's no security risk to letting them override -D. */
1361if ( ! ((real_uid == root_uid)
1362 || (real_uid == exim_uid)
1363#ifdef CONFIGURE_OWNER
1364 || (real_uid == config_uid)
1365#endif
1366 ))
1367 {
1368 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1369 return FALSE;
1370 }
1371
a7cbbf50
PP
1372/* Get a list of macros which are whitelisted */
1373whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1374prev_char_item = FALSE;
1375white_count = 0;
1376for (p = whitelisted; *p != '\0'; ++p)
1377 {
1378 if (*p == ':' || isspace(*p))
1379 {
1380 *p = '\0';
1381 if (prev_char_item)
1382 ++white_count;
1383 prev_char_item = FALSE;
1384 continue;
1385 }
1386 if (!prev_char_item)
1387 prev_char_item = TRUE;
1388 }
1389end = p;
1390if (prev_char_item)
1391 ++white_count;
1392if (!white_count)
1393 return FALSE;
1394whites = store_malloc(sizeof(uschar *) * (white_count+1));
1395for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1396 {
1397 if (*p != '\0')
1398 {
1399 whites[i++] = p;
1400 if (i == white_count)
1401 break;
1402 while (*p != '\0' && p < end)
1403 ++p;
1404 }
1405 }
1406whites[i] = NULL;
1407
1408/* The list of macros should be very short. Accept the N*M complexity. */
1409for (m = macros; m != NULL; m = m->next)
1410 {
1411 found = FALSE;
1412 for (w = whites; *w; ++w)
1413 if (Ustrcmp(*w, m->name) == 0)
1414 {
1415 found = TRUE;
1416 break;
1417 }
1418 if (!found)
1419 return FALSE;
1420 if (m->replacement == NULL)
1421 continue;
1422 len = Ustrlen(m->replacement);
1423 if (len == 0)
1424 continue;
1425 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1426 0, PCRE_EOPT, NULL, 0);
1427 if (n < 0)
1428 {
1429 if (n != PCRE_ERROR_NOMATCH)
1430 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1431 return FALSE;
1432 }
1433 }
43236f35 1434DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1435return TRUE;
1436#endif
1437}
1438
1439
1440/*************************************************
059ec3d9
PH
1441* Entry point and high-level code *
1442*************************************************/
1443
1444/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1445the appropriate action. All the necessary functions are present in the one
1446binary. I originally thought one should split it up, but it turns out that so
1447much of the apparatus is needed in each chunk that one might as well just have
1448it all available all the time, which then makes the coding easier as well.
1449
1450Arguments:
1451 argc count of entries in argv
1452 argv argument strings, with argv[0] being the program name
1453
1454Returns: EXIT_SUCCESS if terminated successfully
1455 EXIT_FAILURE otherwise, except when a message has been sent
1456 to the sender, and -oee was given
1457*/
1458
1459int
1460main(int argc, char **cargv)
1461{
1462uschar **argv = USS cargv;
1463int arg_receive_timeout = -1;
1464int arg_smtp_receive_timeout = -1;
1465int arg_error_handling = error_handling;
f05da2e8
PH
1466int filter_sfd = -1;
1467int filter_ufd = -1;
059ec3d9 1468int group_count;
1670ef10 1469int i, rv;
059ec3d9
PH
1470int list_queue_option = 0;
1471int msg_action = 0;
1472int msg_action_arg = -1;
1473int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1474int queue_only_reason = 0;
1475#ifdef EXIM_PERL
1476int perl_start_option = 0;
1477#endif
1478int recipients_arg = argc;
1479int sender_address_domain = 0;
1480int test_retry_arg = -1;
1481int test_rewrite_arg = -1;
1482BOOL arg_queue_only = FALSE;
1483BOOL bi_option = FALSE;
1484BOOL checking = FALSE;
1485BOOL count_queue = FALSE;
1486BOOL expansion_test = FALSE;
1487BOOL extract_recipients = FALSE;
f4ee74ac 1488BOOL flag_G = FALSE;
12f69989 1489BOOL flag_n = FALSE;
059ec3d9
PH
1490BOOL forced_delivery = FALSE;
1491BOOL f_end_dot = FALSE;
1492BOOL deliver_give_up = FALSE;
1493BOOL list_queue = FALSE;
1494BOOL list_options = FALSE;
bf3c2c6b 1495BOOL list_config = FALSE;
059ec3d9
PH
1496BOOL local_queue_only;
1497BOOL more = TRUE;
1498BOOL one_msg_action = FALSE;
1499BOOL queue_only_set = FALSE;
1500BOOL receiving_message = TRUE;
33d73e3b 1501BOOL sender_ident_set = FALSE;
8669f003 1502BOOL session_local_queue_only;
059ec3d9
PH
1503BOOL unprivileged;
1504BOOL removed_privilege = FALSE;
81ea09ca 1505BOOL usage_wanted = FALSE;
059ec3d9
PH
1506BOOL verify_address_mode = FALSE;
1507BOOL verify_as_sender = FALSE;
1508BOOL version_printed = FALSE;
1509uschar *alias_arg = NULL;
1510uschar *called_as = US"";
a3fb9793 1511uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1512uschar *start_queue_run_id = NULL;
1513uschar *stop_queue_run_id = NULL;
328895cc 1514uschar *expansion_test_message = NULL;
059ec3d9
PH
1515uschar *ftest_domain = NULL;
1516uschar *ftest_localpart = NULL;
1517uschar *ftest_prefix = NULL;
1518uschar *ftest_suffix = NULL;
0ad2e0fc 1519uschar *log_oneline = NULL;
8544e77a 1520uschar *malware_test_file = NULL;
059ec3d9
PH
1521uschar *real_sender_address;
1522uschar *originator_home = US"/";
a3fb9793 1523size_t sz;
059ec3d9
PH
1524void *reset_point;
1525
1526struct passwd *pw;
1527struct stat statbuf;
1528pid_t passed_qr_pid = (pid_t)0;
1529int passed_qr_pipe = -1;
1530gid_t group_list[NGROUPS_MAX];
1531
98a90c36
PP
1532/* For the -bI: flag */
1533enum commandline_info info_flag = CMDINFO_NONE;
1534BOOL info_stdout = FALSE;
1535
059ec3d9
PH
1536/* Possible options for -R and -S */
1537
1538static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1539
1540/* Need to define this in case we need to change the environment in order
1541to get rid of a bogus time zone. We have to make it char rather than uschar
1542because some OS define it in /usr/include/unistd.h. */
1543
1544extern char **environ;
1545
35edf2ff 1546/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1547defined by ref:name at build time, we must now find the actual uid/gid values.
1548This is a feature to make the lives of binary distributors easier. */
1549
1550#ifdef EXIM_USERNAME
1551if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1552 {
10385c15
PP
1553 if (exim_uid == 0)
1554 {
1555 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1556 EXIM_USERNAME);
1557 exit(EXIT_FAILURE);
1558 }
084c1d8c
PP
1559 /* If ref:name uses a number as the name, route_finduser() returns
1560 TRUE with exim_uid set and pw coerced to NULL. */
1561 if (pw)
1562 exim_gid = pw->pw_gid;
1563#ifndef EXIM_GROUPNAME
1564 else
1565 {
1566 fprintf(stderr,
1567 "exim: ref:name should specify a usercode, not a group.\n"
1568 "exim: can't let you get away with it unless you also specify a group.\n");
1569 exit(EXIT_FAILURE);
1570 }
1571#endif
059ec3d9
PH
1572 }
1573else
1574 {
1575 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1576 EXIM_USERNAME);
1577 exit(EXIT_FAILURE);
1578 }
1579#endif
1580
1581#ifdef EXIM_GROUPNAME
1582if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1583 {
1584 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1585 EXIM_GROUPNAME);
1586 exit(EXIT_FAILURE);
1587 }
1588#endif
1589
1590#ifdef CONFIGURE_OWNERNAME
1591if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1592 {
1593 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1594 CONFIGURE_OWNERNAME);
1595 exit(EXIT_FAILURE);
1596 }
1597#endif
1598
79d4bc3d
PP
1599/* We default the system_filter_user to be the Exim run-time user, as a
1600sane non-root value. */
1601system_filter_uid = exim_uid;
1602
35edf2ff
PH
1603#ifdef CONFIGURE_GROUPNAME
1604if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1605 {
1606 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1607 CONFIGURE_GROUPNAME);
1608 exit(EXIT_FAILURE);
1609 }
1610#endif
1611
92e6a3d9
JH
1612/* In the Cygwin environment, some initialization used to need doing.
1613It was fudged in by means of this macro; now no longer but we'll leave
1614it in case of others. */
059ec3d9
PH
1615
1616#ifdef OS_INIT
1617OS_INIT
1618#endif
1619
1620/* Check a field which is patched when we are running Exim within its
1621testing harness; do a fast initial check, and then the whole thing. */
1622
1623running_in_test_harness =
1624 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1625
1626/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1627at the start of a program; however, it seems that some environments do not
1628follow this. A "strange" locale can affect the formatting of timestamps, so we
1629make quite sure. */
1630
1631setlocale(LC_ALL, "C");
1632
1633/* Set up the default handler for timing using alarm(). */
1634
1635os_non_restarting_signal(SIGALRM, sigalrm_handler);
1636
1637/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1638because store_malloc writes a log entry on failure. */
1639
1640log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1641if (log_buffer == NULL)
1642 {
1643 fprintf(stderr, "exim: failed to get store for log buffer\n");
1644 exit(EXIT_FAILURE);
1645 }
1646
6c6d6e48
TF
1647/* Initialize the default log options. */
1648
1649bits_set(log_selector, log_selector_size, log_default);
1650
059ec3d9
PH
1651/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1652NULL when the daemon is run and the file is closed. We have to use this
1653indirection, because some systems don't allow writing to the variable "stderr".
1654*/
1655
1656if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1657
1658/* Arrange for the PCRE regex library to use our store functions. Note that
1659the normal calls are actually macros that add additional arguments for
1660debugging purposes so we have to assign specially constructed functions here.
1661The default is to use store in the stacking pool, but this is overridden in the
1662regex_must_compile() function. */
1663
1664pcre_malloc = function_store_get;
1665pcre_free = function_dummy_free;
1666
1667/* Ensure there is a big buffer for temporary use in several places. It is put
1668in malloc store so that it can be freed for enlargement if necessary. */
1669
1670big_buffer = store_malloc(big_buffer_size);
1671
1672/* Set up the handler for the data request signal, and set the initial
1673descriptive text. */
1674
1675set_process_info("initializing");
1676os_restarting_signal(SIGUSR1, usr1_handler);
1677
1678/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1679in the daemon code. For the rest of Exim's uses, we ignore it. */
1680
1681signal(SIGHUP, SIG_IGN);
1682
1683/* We don't want to die on pipe errors as the code is written to handle
1684the write error instead. */
1685
1686signal(SIGPIPE, SIG_IGN);
1687
1688/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1689set to SIG_IGN. This causes subprocesses that complete before the parent
1690process waits for them not to hang around, so when Exim calls wait(), nothing
1691is there. The wait() code has been made robust against this, but let's ensure
1692that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1693ending status. We use sigaction rather than plain signal() on those OS where
1694SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1695problem on AIX with this.) */
1696
1697#ifdef SA_NOCLDWAIT
1698 {
1699 struct sigaction act;
1700 act.sa_handler = SIG_DFL;
1701 sigemptyset(&(act.sa_mask));
1702 act.sa_flags = 0;
1703 sigaction(SIGCHLD, &act, NULL);
1704 }
1705#else
1706signal(SIGCHLD, SIG_DFL);
1707#endif
1708
1709/* Save the arguments for use if we re-exec exim as a daemon after receiving
1710SIGHUP. */
1711
1712sighup_argv = argv;
1713
1714/* Set up the version number. Set up the leading 'E' for the external form of
1715message ids, set the pointer to the internal form, and initialize it to
1716indicate no message being processed. */
1717
1718version_init();
1719message_id_option[0] = '-';
1720message_id_external = message_id_option + 1;
1721message_id_external[0] = 'E';
1722message_id = message_id_external + 1;
1723message_id[0] = 0;
1724
67d175de 1725/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1726created with the modes that it specifies. NOTE: Files created with fopen() have
1727a problem, which was not recognized till rather late (February 2006). With this
1728umask, such files will be world writeable. (They are all content scanning files
1729in the spool directory, which isn't world-accessible, so this is not a
1730disaster, but it's untidy.) I don't want to change this overall setting,
1731however, because it will interact badly with the open() calls. Instead, there's
1732now a function called modefopen() that fiddles with the umask while calling
1733fopen(). */
059ec3d9 1734
67d175de 1735(void)umask(0);
059ec3d9
PH
1736
1737/* Precompile the regular expression for matching a message id. Keep this in
1738step with the code that generates ids in the accept.c module. We need to do
1739this here, because the -M options check their arguments for syntactic validity
1740using mac_ismsgid, which uses this. */
1741
1742regex_ismsgid =
1743 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1744
a5bd321b 1745/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1746code, possibly extended, at the start of an error message. Note that the
1747terminating whitespace character is included. */
a5bd321b
PH
1748
1749regex_smtp_code =
1750 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1751 FALSE, TRUE);
1752
a7cbbf50
PP
1753#ifdef WHITELIST_D_MACROS
1754/* Precompile the regular expression used to filter the content of macros
1755given to -D for permissibility. */
1756
1757regex_whitelisted_macro =
1758 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1759#endif
1760
f38917cc
JH
1761for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1762
a7cbbf50 1763
059ec3d9
PH
1764/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1765this seems to be a generally accepted convention, since one finds symbolic
1766links called "mailq" in standard OS configurations. */
1767
1768if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1769 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1770 {
1771 list_queue = TRUE;
1772 receiving_message = FALSE;
1773 called_as = US"-mailq";
1774 }
1775
1776/* If the program is called as "rmail" treat it as equivalent to
1777"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1778i.e. preventing a single dot on a line from terminating the message, and
1779returning with zero return code, even in cases of error (provided an error
1780message has been sent). */
1781
1782if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1783 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1784 {
1785 dot_ends = FALSE;
1786 called_as = US"-rmail";
1787 errors_sender_rc = EXIT_SUCCESS;
1788 }
1789
1790/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1791this is a smail convention. */
1792
1793if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1794 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1795 {
1796 smtp_input = smtp_batched_input = TRUE;
1797 called_as = US"-rsmtp";
1798 }
1799
1800/* If the program is called as "runq" treat it as equivalent to "exim -q";
1801this is a smail convention. */
1802
1803if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1804 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1805 {
1806 queue_interval = 0;
1807 receiving_message = FALSE;
1808 called_as = US"-runq";
1809 }
1810
1811/* If the program is called as "newaliases" treat it as equivalent to
1812"exim -bi"; this is a sendmail convention. */
1813
1814if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1815 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1816 {
1817 bi_option = TRUE;
1818 receiving_message = FALSE;
1819 called_as = US"-newaliases";
1820 }
1821
1822/* Save the original effective uid for a couple of uses later. It should
1823normally be root, but in some esoteric environments it may not be. */
1824
1825original_euid = geteuid();
1826
1827/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1828to be the same as the real ones. This makes a difference only if Exim is setuid
1829(or setgid) to something other than root, which could be the case in some
1830special configurations. */
1831
1832real_uid = getuid();
1833real_gid = getgid();
1834
1835if (real_uid == root_uid)
1836 {
1670ef10
PP
1837 rv = setgid(real_gid);
1838 if (rv)
1839 {
1840 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1841 (long int)real_gid, strerror(errno));
1842 exit(EXIT_FAILURE);
1843 }
1844 rv = setuid(real_uid);
1845 if (rv)
1846 {
1847 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1848 (long int)real_uid, strerror(errno));
1849 exit(EXIT_FAILURE);
1850 }
059ec3d9
PH
1851 }
1852
1853/* If neither the original real uid nor the original euid was root, Exim is
1854running in an unprivileged state. */
1855
1856unprivileged = (real_uid != root_uid && original_euid != root_uid);
1857
059ec3d9
PH
1858/* Scan the program's arguments. Some can be dealt with right away; others are
1859simply recorded for checking and handling afterwards. Do a high-level switch
1860on the second character (the one after '-'), to save some effort. */
1861
1862for (i = 1; i < argc; i++)
1863 {
1864 BOOL badarg = FALSE;
1865 uschar *arg = argv[i];
1866 uschar *argrest;
1867 int switchchar;
1868
1869 /* An argument not starting with '-' is the start of a recipients list;
1870 break out of the options-scanning loop. */
1871
1872 if (arg[0] != '-')
1873 {
1874 recipients_arg = i;
1875 break;
1876 }
1877
1878 /* An option consistion of -- terminates the options */
1879
1880 if (Ustrcmp(arg, "--") == 0)
1881 {
1882 recipients_arg = i + 1;
1883 break;
1884 }
1885
1886 /* Handle flagged options */
1887
1888 switchchar = arg[1];
1889 argrest = arg+2;
1890
1891 /* Make all -ex options synonymous with -oex arguments, since that
1892 is assumed by various callers. Also make -qR options synonymous with -R
1893 options, as that seems to be required as well. Allow for -qqR too, and
1894 the same for -S options. */
1895
1896 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1897 Ustrncmp(arg+1, "qR", 2) == 0 ||
1898 Ustrncmp(arg+1, "qS", 2) == 0)
1899 {
1900 switchchar = arg[2];
1901 argrest++;
1902 }
1903 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1904 {
1905 switchchar = arg[3];
1906 argrest += 2;
1907 queue_2stage = TRUE;
1908 }
1909
1910 /* Make -r synonymous with -f, since it is a documented alias */
1911
1912 else if (arg[1] == 'r') switchchar = 'f';
1913
1914 /* Make -ov synonymous with -v */
1915
1916 else if (Ustrcmp(arg, "-ov") == 0)
1917 {
1918 switchchar = 'v';
1919 argrest++;
1920 }
1921
4b2241d2
PP
1922 /* deal with --option_aliases */
1923 else if (switchchar == '-')
1924 {
1925 if (Ustrcmp(argrest, "help") == 0)
1926 {
1927 usage_wanted = TRUE;
1928 break;
1929 }
1930 else if (Ustrcmp(argrest, "version") == 0)
1931 {
1932 switchchar = 'b';
73a46702 1933 argrest = US"V";
4b2241d2
PP
1934 }
1935 }
1936
059ec3d9
PH
1937 /* High-level switch on active initial letter */
1938
1939 switch(switchchar)
1940 {
a3fb9793
PP
1941
1942 /* sendmail uses -Ac and -Am to control which .cf file is used;
1943 we ignore them. */
1944 case 'A':
1945 if (*argrest == '\0') { badarg = TRUE; break; }
1946 else
1947 {
1948 BOOL ignore = FALSE;
1949 switch (*argrest)
1950 {
1951 case 'c':
1952 case 'm':
1953 if (*(argrest + 1) == '\0')
1954 ignore = TRUE;
1955 break;
1956 }
1957 if (!ignore) { badarg = TRUE; break; }
1958 }
1959 break;
1960
059ec3d9
PH
1961 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1962 so has no need of it. */
1963
1964 case 'B':
1965 if (*argrest == 0) i++; /* Skip over the type */
1966 break;
1967
1968
1969 case 'b':
1970 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1971
1972 /* -bd: Run in daemon mode, awaiting SMTP connections.
1973 -bdf: Ditto, but in the foreground.
1974 */
1975
1976 if (*argrest == 'd')
1977 {
1978 daemon_listen = TRUE;
1979 if (*(++argrest) == 'f') background_daemon = FALSE;
1980 else if (*argrest != 0) { badarg = TRUE; break; }
1981 }
1982
328895cc
PH
1983 /* -be: Run in expansion test mode
1984 -bem: Ditto, but read a message from a file first
1985 */
059ec3d9
PH
1986
1987 else if (*argrest == 'e')
328895cc 1988 {
059ec3d9 1989 expansion_test = checking = TRUE;
328895cc
PH
1990 if (argrest[1] == 'm')
1991 {
1992 if (++i >= argc) { badarg = TRUE; break; }
1993 expansion_test_message = argv[i];
1994 argrest++;
1995 }
1996 if (argrest[1] != 0) { badarg = TRUE; break; }
1997 }
059ec3d9 1998
f05da2e8
PH
1999 /* -bF: Run system filter test */
2000
2001 else if (*argrest == 'F')
2002 {
2003 filter_test |= FTEST_SYSTEM;
2004 if (*(++argrest) != 0) { badarg = TRUE; break; }
2005 if (++i < argc) filter_test_sfile = argv[i]; else
2006 {
2007 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2008 exit(EXIT_FAILURE);
2009 }
2010 }
2011
2012 /* -bf: Run user filter test
059ec3d9
PH
2013 -bfd: Set domain for filter testing
2014 -bfl: Set local part for filter testing
2015 -bfp: Set prefix for filter testing
2016 -bfs: Set suffix for filter testing
2017 */
2018
f05da2e8 2019 else if (*argrest == 'f')
059ec3d9 2020 {
f05da2e8 2021 if (*(++argrest) == 0)
059ec3d9 2022 {
f05da2e8
PH
2023 filter_test |= FTEST_USER;
2024 if (++i < argc) filter_test_ufile = argv[i]; else
059ec3d9
PH
2025 {
2026 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2027 exit(EXIT_FAILURE);
2028 }
2029 }
2030 else
2031 {
2032 if (++i >= argc)
2033 {
2034 fprintf(stderr, "exim: string expected after %s\n", arg);
2035 exit(EXIT_FAILURE);
2036 }
2037 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2038 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2039 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2040 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2041 else { badarg = TRUE; break; }
2042 }
2043 }
2044
2045 /* -bh: Host checking - an IP address must follow. */
2046
2047 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2048 {
2049 if (++i >= argc) { badarg = TRUE; break; }
2050 sender_host_address = argv[i];
2051 host_checking = checking = log_testing_mode = TRUE;
2052 host_checking_callout = argrest[1] == 'c';
2053 }
2054
2055 /* -bi: This option is used by sendmail to initialize *the* alias file,
2056 though it has the -oA option to specify a different file. Exim has no
2057 concept of *the* alias file, but since Sun's YP make script calls
2058 sendmail this way, some support must be provided. */
2059
2060 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2061
98a90c36
PP
2062 /* -bI: provide information, of the type to follow after a colon.
2063 This is an Exim flag. */
2064
2065 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2066 {
2067 uschar *p = &argrest[2];
2068 info_flag = CMDINFO_HELP;
2069 if (Ustrlen(p))
2070 {
2071 if (strcmpic(p, CUS"sieve") == 0)
2072 {
2073 info_flag = CMDINFO_SIEVE;
2074 info_stdout = TRUE;
2075 }
36a3ae5f
PP
2076 else if (strcmpic(p, CUS"dscp") == 0)
2077 {
2078 info_flag = CMDINFO_DSCP;
2079 info_stdout = TRUE;
2080 }
98a90c36
PP
2081 else if (strcmpic(p, CUS"help") == 0)
2082 {
2083 info_stdout = TRUE;
2084 }
2085 }
2086 }
2087
059ec3d9
PH
2088 /* -bm: Accept and deliver message - the default option. Reinstate
2089 receiving_message, which got turned off for all -b options. */
2090
2091 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2092
8544e77a
PP
2093 /* -bmalware: test the filename given for malware */
2094
2095 else if (Ustrcmp(argrest, "malware") == 0)
2096 {
2097 if (++i >= argc) { badarg = TRUE; break; }
2098 malware_test_file = argv[i];
2099 }
2100
059ec3d9
PH
2101 /* -bnq: For locally originating messages, do not qualify unqualified
2102 addresses. In the envelope, this causes errors; in header lines they
2103 just get left. */
2104
2105 else if (Ustrcmp(argrest, "nq") == 0)
2106 {
2107 allow_unqualified_sender = FALSE;
2108 allow_unqualified_recipient = FALSE;
2109 }
2110
2111 /* -bpxx: List the contents of the mail queue, in various forms. If
2112 the option is -bpc, just a queue count is needed. Otherwise, if the
2113 first letter after p is r, then order is random. */
2114
2115 else if (*argrest == 'p')
2116 {
2117 if (*(++argrest) == 'c')
2118 {
2119 count_queue = TRUE;
2120 if (*(++argrest) != 0) badarg = TRUE;
2121 break;
2122 }
2123
2124 if (*argrest == 'r')
2125 {
2126 list_queue_option = 8;
2127 argrest++;
2128 }
2129 else list_queue_option = 0;
2130
2131 list_queue = TRUE;
2132
2133 /* -bp: List the contents of the mail queue, top-level only */
2134
2135 if (*argrest == 0) {}
2136
2137 /* -bpu: List the contents of the mail queue, top-level undelivered */
2138
2139 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2140
2141 /* -bpa: List the contents of the mail queue, including all delivered */
2142
2143 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2144
2145 /* Unknown after -bp[r] */
2146
2147 else
2148 {
2149 badarg = TRUE;
2150 break;
2151 }
2152 }
2153
2154
2155 /* -bP: List the configuration variables given as the address list.
2156 Force -v, so configuration errors get displayed. */
2157
2158 else if (Ustrcmp(argrest, "P") == 0)
2159 {
bf3c2c6b
HSHR
2160 /* -bP config: we need to setup here, because later,
2161 * when list_options is checked, the config is read already */
2162 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2163 {
2164 list_config = TRUE;
2165 readconf_save_config(version_string);
2166 }
2167 else
2168 {
2169 list_options = TRUE;
2170 debug_selector |= D_v;
2171 debug_file = stderr;
2172 }
059ec3d9
PH
2173 }
2174
2175 /* -brt: Test retry configuration lookup */
2176
2177 else if (Ustrcmp(argrest, "rt") == 0)
2178 {
2179 test_retry_arg = i + 1;
2180 goto END_ARG;
2181 }
2182
2183 /* -brw: Test rewrite configuration */
2184
2185 else if (Ustrcmp(argrest, "rw") == 0)
2186 {
2187 test_rewrite_arg = i + 1;
2188 goto END_ARG;
2189 }
2190
2191 /* -bS: Read SMTP commands on standard input, but produce no replies -
2192 all errors are reported by sending messages. */
2193
2194 else if (Ustrcmp(argrest, "S") == 0)
2195 smtp_input = smtp_batched_input = receiving_message = TRUE;
2196
2197 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2198 on standard output. */
2199
2200 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2201
2202 /* -bt: address testing mode */
2203
2204 else if (Ustrcmp(argrest, "t") == 0)
2205 address_test_mode = checking = log_testing_mode = TRUE;
2206
2207 /* -bv: verify addresses */
2208
2209 else if (Ustrcmp(argrest, "v") == 0)
2210 verify_address_mode = checking = log_testing_mode = TRUE;
2211
2212 /* -bvs: verify sender addresses */
2213
2214 else if (Ustrcmp(argrest, "vs") == 0)
2215 {
2216 verify_address_mode = checking = log_testing_mode = TRUE;
2217 verify_as_sender = TRUE;
2218 }
2219
2220 /* -bV: Print version string and support details */
2221
2222 else if (Ustrcmp(argrest, "V") == 0)
2223 {
2224 printf("Exim version %s #%s built %s\n", version_string,
2225 version_cnumber, version_date);
2226 printf("%s\n", CS version_copyright);
2227 version_printed = TRUE;
2228 show_whats_supported(stdout);
2229 }
2230
9ee44efb
PP
2231 /* -bw: inetd wait mode, accept a listening socket as stdin */
2232
2233 else if (*argrest == 'w')
2234 {
2235 inetd_wait_mode = TRUE;
2236 background_daemon = FALSE;
2237 daemon_listen = TRUE;
2238 if (*(++argrest) != '\0')
2239 {
2240 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2241 if (inetd_wait_timeout <= 0)
2242 {
2243 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2244 exit(EXIT_FAILURE);
2245 }
2246 }
2247 }
2248
059ec3d9
PH
2249 else badarg = TRUE;
2250 break;
2251
2252
2253 /* -C: change configuration file list; ignore if it isn't really
2254 a change! Enforce a prefix check if required. */
2255
2256 case 'C':
2257 if (*argrest == 0)
2258 {
2259 if(++i < argc) argrest = argv[i]; else
2260 { badarg = TRUE; break; }
2261 }
2262 if (Ustrcmp(config_main_filelist, argrest) != 0)
2263 {
2264 #ifdef ALT_CONFIG_PREFIX
2265 int sep = 0;
2266 int len = Ustrlen(ALT_CONFIG_PREFIX);
2267 uschar *list = argrest;
2268 uschar *filename;
2269 while((filename = string_nextinlist(&list, &sep, big_buffer,
2270 big_buffer_size)) != NULL)
2271 {
2272 if ((Ustrlen(filename) < len ||
2273 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2274 Ustrstr(filename, "/../") != NULL) &&
2275 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2276 {
2277 fprintf(stderr, "-C Permission denied\n");
2278 exit(EXIT_FAILURE);
2279 }
2280 }
2281 #endif
261dc43e
DW
2282 if (real_uid != root_uid)
2283 {
90b6341f 2284 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2285
90b6341f
DW
2286 if (real_uid != exim_uid
2287 #ifdef CONFIGURE_OWNER
2288 && real_uid != config_uid
2289 #endif
2290 )
261dc43e
DW
2291 trusted_config = FALSE;
2292 else
2293 {
90b6341f 2294 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2295 if (trust_list)
2296 {
2297 struct stat statbuf;
2298
2299 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2300 (statbuf.st_uid != root_uid /* owner not root */
2301 #ifdef CONFIGURE_OWNER
2302 && statbuf.st_uid != config_uid /* owner not the special one */
2303 #endif
2304 ) || /* or */
2305 (statbuf.st_gid != root_gid /* group not root */
2306 #ifdef CONFIGURE_GROUP
2307 && statbuf.st_gid != config_gid /* group not the special one */
2308 #endif
2309 && (statbuf.st_mode & 020) != 0 /* group writeable */
2310 ) || /* or */
2311 (statbuf.st_mode & 2) != 0) /* world writeable */
2312 {
2313 trusted_config = FALSE;
2314 fclose(trust_list);
2315 }
2316 else
2317 {
2318 /* Well, the trust list at least is up to scratch... */
2319 void *reset_point = store_get(0);
90b6341f
DW
2320 uschar *trusted_configs[32];
2321 int nr_configs = 0;
261dc43e
DW
2322 int i = 0;
2323
2324 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2325 {
2326 uschar *start = big_buffer, *nl;
2327 while (*start && isspace(*start))
2328 start++;
1e83d68b 2329 if (*start != '/')
261dc43e
DW
2330 continue;
2331 nl = Ustrchr(start, '\n');
2332 if (nl)
2333 *nl = 0;
90b6341f
DW
2334 trusted_configs[nr_configs++] = string_copy(start);
2335 if (nr_configs == 32)
261dc43e
DW
2336 break;
2337 }
2338 fclose(trust_list);
2339
90b6341f 2340 if (nr_configs)
261dc43e
DW
2341 {
2342 int sep = 0;
55414b25 2343 const uschar *list = argrest;
261dc43e
DW
2344 uschar *filename;
2345 while (trusted_config && (filename = string_nextinlist(&list,
2346 &sep, big_buffer, big_buffer_size)) != NULL)
2347 {
90b6341f 2348 for (i=0; i < nr_configs; i++)
261dc43e 2349 {
90b6341f 2350 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e
DW
2351 break;
2352 }
90b6341f 2353 if (i == nr_configs)
261dc43e
DW
2354 {
2355 trusted_config = FALSE;
2356 break;
2357 }
2358 }
1e83d68b 2359 store_reset(reset_point);
261dc43e
DW
2360 }
2361 else
2362 {
2363 /* No valid prefixes found in trust_list file. */
2364 trusted_config = FALSE;
2365 }
2366 }
2367 }
2368 else
2369 {
2370 /* Could not open trust_list file. */
2371 trusted_config = FALSE;
2372 }
2373 }
2374 #else
2375 /* Not root; don't trust config */
2376 trusted_config = FALSE;
2377 #endif
2378 }
059ec3d9
PH
2379
2380 config_main_filelist = argrest;
2381 config_changed = TRUE;
2382 }
2383 break;
2384
2385
2386 /* -D: set up a macro definition */
2387
2388 case 'D':
2389 #ifdef DISABLE_D_OPTION
2390 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2391 exit(EXIT_FAILURE);
2392 #else
2393 {
2394 int ptr = 0;
2395 macro_item *mlast = NULL;
2396 macro_item *m;
2397 uschar name[24];
2398 uschar *s = argrest;
2399
2400 while (isspace(*s)) s++;
2401
2402 if (*s < 'A' || *s > 'Z')
2403 {
2404 fprintf(stderr, "exim: macro name set by -D must start with "
2405 "an upper case letter\n");
2406 exit(EXIT_FAILURE);
2407 }
2408
2409 while (isalnum(*s) || *s == '_')
2410 {
2411 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2412 s++;
2413 }
2414 name[ptr] = 0;
2415 if (ptr == 0) { badarg = TRUE; break; }
2416 while (isspace(*s)) s++;
2417 if (*s != 0)
2418 {
2419 if (*s++ != '=') { badarg = TRUE; break; }
2420 while (isspace(*s)) s++;
2421 }
2422
2423 for (m = macros; m != NULL; m = m->next)
2424 {
2425 if (Ustrcmp(m->name, name) == 0)
2426 {
2427 fprintf(stderr, "exim: duplicated -D in command line\n");
2428 exit(EXIT_FAILURE);
2429 }
2430 mlast = m;
2431 }
2432
2433 m = store_get(sizeof(macro_item) + Ustrlen(name));
2434 m->next = NULL;
2435 m->command_line = TRUE;
2436 if (mlast == NULL) macros = m; else mlast->next = m;
2437 Ustrcpy(m->name, name);
2438 m->replacement = string_copy(s);
2439
2440 if (clmacro_count >= MAX_CLMACROS)
2441 {
2442 fprintf(stderr, "exim: too many -D options on command line\n");
2443 exit(EXIT_FAILURE);
2444 }
2445 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2446 m->replacement);
2447 }
2448 #endif
2449 break;
2450
2451 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2452 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2453 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2454
2455 case 'd':
2456 if (Ustrcmp(argrest, "ropcr") == 0)
2457 {
2458 /* drop_cr = TRUE; */
2459 }
2460
2461 /* Use an intermediate variable so that we don't set debugging while
2462 decoding the debugging bits. */
2463
2464 else
2465 {
2466 unsigned int selector = D_default;
2467 debug_selector = 0;
2468 debug_file = NULL;
3d235903
PH
2469 if (*argrest == 'd')
2470 {
2471 debug_daemon = TRUE;
2472 argrest++;
2473 }
059ec3d9 2474 if (*argrest != 0)
6c6d6e48
TF
2475 decode_bits(&selector, 1, debug_notall, argrest,
2476 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2477 debug_selector = selector;
2478 }
2479 break;
2480
2481
2482 /* -E: This is a local error message. This option is not intended for
2483 external use at all, but is not restricted to trusted callers because it
2484 does no harm (just suppresses certain error messages) and if Exim is run
2485 not setuid root it won't always be trusted when it generates error
2486 messages using this option. If there is a message id following -E, point
2487 message_reference at it, for logging. */
2488
2489 case 'E':
2490 local_error_message = TRUE;
2491 if (mac_ismsgid(argrest)) message_reference = argrest;
2492 break;
2493
2494
2495 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2496 option, so it looks as if historically the -oex options are also callable
2497 without the leading -o. So we have to accept them. Before the switch,
2498 anything starting -oe has been converted to -e. Exim does not support all
2499 of the sendmail error options. */
2500
2501 case 'e':
2502 if (Ustrcmp(argrest, "e") == 0)
2503 {
2504 arg_error_handling = ERRORS_SENDER;
2505 errors_sender_rc = EXIT_SUCCESS;
2506 }
2507 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2508 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2509 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2510 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2511 else badarg = TRUE;
2512 break;
2513
2514
2515 /* -F: Set sender's full name, used instead of the gecos entry from
2516 the password file. Since users can usually alter their gecos entries,
2517 there's no security involved in using this instead. The data can follow
2518 the -F or be in the next argument. */
2519
2520 case 'F':
2521 if (*argrest == 0)
2522 {
2523 if(++i < argc) argrest = argv[i]; else
2524 { badarg = TRUE; break; }
2525 }
2526 originator_name = argrest;
2fe1a124 2527 sender_name_forced = TRUE;
059ec3d9
PH
2528 break;
2529
2530
2531 /* -f: Set sender's address - this value is only actually used if Exim is
2532 run by a trusted user, or if untrusted_set_sender is set and matches the
2533 address, except that the null address can always be set by any user. The
2534 test for this happens later, when the value given here is ignored when not
2535 permitted. For an untrusted user, the actual sender is still put in Sender:
2536 if it doesn't match the From: header (unless no_local_from_check is set).
2537 The data can follow the -f or be in the next argument. The -r switch is an
2538 obsolete form of -f but since there appear to be programs out there that
2539 use anything that sendmail has ever supported, better accept it - the
2540 synonymizing is done before the switch above.
2541
2542 At this stage, we must allow domain literal addresses, because we don't
2543 know what the setting of allow_domain_literals is yet. Ditto for trailing
2544 dots and strip_trailing_dot. */
2545
2546 case 'f':
2547 {
250b6871 2548 int dummy_start, dummy_end;
059ec3d9
PH
2549 uschar *errmess;
2550 if (*argrest == 0)
2551 {
2552 if (i+1 < argc) argrest = argv[++i]; else
2553 { badarg = TRUE; break; }
2554 }
2555 if (*argrest == 0)
059ec3d9 2556 sender_address = string_sprintf(""); /* Ensure writeable memory */
059ec3d9
PH
2557 else
2558 {
2559 uschar *temp = argrest + Ustrlen(argrest) - 1;
2560 while (temp >= argrest && isspace(*temp)) temp--;
2561 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2562 allow_domain_literals = TRUE;
2563 strip_trailing_dot = TRUE;
250b6871
JH
2564#ifdef EXPERIMENTAL_INTERNATIONAL
2565 allow_utf8_domains = TRUE;
2566#endif
2567 sender_address = parse_extract_address(argrest, &errmess,
2568 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2569#ifdef EXPERIMENTAL_INTERNATIONAL
2570 message_smtputf8 = string_is_utf8(sender_address);
2571 allow_utf8_domains = FALSE;
2572#endif
059ec3d9
PH
2573 allow_domain_literals = FALSE;
2574 strip_trailing_dot = FALSE;
2575 if (sender_address == NULL)
2576 {
2577 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2578 return EXIT_FAILURE;
2579 }
2580 }
2581 sender_address_forced = TRUE;
2582 }
2583 break;
2584
a3fb9793 2585 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2586 sendmail may complain about problems instead of fixing them.
2587 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2588 not at this time complain about problems. */
059ec3d9
PH
2589
2590 case 'G':
f4ee74ac 2591 flag_G = TRUE;
059ec3d9
PH
2592 break;
2593
2594 /* -h: Set the hop count for an incoming message. Exim does not currently
2595 support this; it always computes it by counting the Received: headers.
2596 To put it in will require a change to the spool header file format. */
2597
2598 case 'h':
2599 if (*argrest == 0)
2600 {
2601 if(++i < argc) argrest = argv[i]; else
2602 { badarg = TRUE; break; }
2603 }
2604 if (!isdigit(*argrest)) badarg = TRUE;
2605 break;
2606
2607
2608 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2609 not to be documented for sendmail but mailx (at least) uses it) */
2610
2611 case 'i':
2612 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2613 break;
2614
2615
a3fb9793
PP
2616 /* -L: set the identifier used for syslog; equivalent to setting
2617 syslog_processname in the config file, but needs to be an admin option. */
2618
2619 case 'L':
2620 if (*argrest == '\0')
2621 {
2622 if(++i < argc) argrest = argv[i]; else
2623 { badarg = TRUE; break; }
2624 }
2625 sz = Ustrlen(argrest);
2626 if (sz > 32)
2627 {
2628 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2629 return EXIT_FAILURE;
2630 }
2631 if (sz < 1)
2632 {
2633 fprintf(stderr, "exim: the -L syslog name is too short\n");
2634 return EXIT_FAILURE;
2635 }
2636 cmdline_syslog_name = argrest;
2637 break;
2638
059ec3d9
PH
2639 case 'M':
2640 receiving_message = FALSE;
2641
2642 /* -MC: continue delivery of another message via an existing open
2643 file descriptor. This option is used for an internal call by the
2644 smtp transport when there is a pending message waiting to go to an
2645 address to which it has got a connection. Five subsequent arguments are
2646 required: transport name, host name, IP address, sequence number, and
2647 message_id. Transports may decline to create new processes if the sequence
2648 number gets too big. The channel is stdin. This (-MC) must be the last
2649 argument. There's a subsequent check that the real-uid is privileged.
2650
2651 If we are running in the test harness. delay for a bit, to let the process
2652 that set this one up complete. This makes for repeatability of the logging,
2653 etc. output. */
2654
2655 if (Ustrcmp(argrest, "C") == 0)
2656 {
41c7c167
PH
2657 union sockaddr_46 interface_sock;
2658 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2659
059ec3d9
PH
2660 if (argc != i + 6)
2661 {
2662 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2663 return EXIT_FAILURE;
2664 }
2665
2666 if (msg_action_arg >= 0)
2667 {
2668 fprintf(stderr, "exim: incompatible arguments\n");
2669 return EXIT_FAILURE;
2670 }
2671
2672 continue_transport = argv[++i];
2673 continue_hostname = argv[++i];
2674 continue_host_address = argv[++i];
2675 continue_sequence = Uatoi(argv[++i]);
2676 msg_action = MSG_DELIVER;
2677 msg_action_arg = ++i;
2678 forced_delivery = TRUE;
2679 queue_run_pid = passed_qr_pid;
2680 queue_run_pipe = passed_qr_pipe;
2681
2682 if (!mac_ismsgid(argv[i]))
2683 {
2684 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2685 argv[i]);
2686 return EXIT_FAILURE;
2687 }
2688
41c7c167
PH
2689 /* Set up $sending_ip_address and $sending_port */
2690
2691 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2692 &size) == 0)
2693 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2694 &sending_port);
2695 else
2696 {
2697 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2698 strerror(errno));
2699 return EXIT_FAILURE;
2700 }
2701
059ec3d9
PH
2702 if (running_in_test_harness) millisleep(500);
2703 break;
2704 }
2705
2706 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2707 precedes -MC (see above). The flag indicates that the host to which
2708 Exim is connected has accepted an AUTH sequence. */
2709
2710 else if (Ustrcmp(argrest, "CA") == 0)
2711 {
2712 smtp_authenticated = TRUE;
2713 break;
2714 }
2715
6c1c3d1d
WB
2716 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2717 that exim is connected to supports the esmtp extension DSN */
45500060 2718 else if (Ustrcmp(argrest, "CD") == 0)
6c1c3d1d
WB
2719 {
2720 smtp_use_dsn = TRUE;
2721 break;
2722 }
6c1c3d1d 2723
059ec3d9
PH
2724 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2725 it preceded -MC (see above) */
2726
2727 else if (Ustrcmp(argrest, "CP") == 0)
2728 {
2729 smtp_use_pipelining = TRUE;
2730 break;
2731 }
2732
2733 /* -MCQ: pass on the pid of the queue-running process that started
2734 this chain of deliveries and the fd of its synchronizing pipe; this
2735 is useful only when it precedes -MC (see above) */
2736
2737 else if (Ustrcmp(argrest, "CQ") == 0)
2738 {
2739 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2740 else badarg = TRUE;
2741 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2742 else badarg = TRUE;
2743 break;
2744 }
2745
2746 /* -MCS: set the smtp_use_size flag; this is useful only when it
2747 precedes -MC (see above) */
2748
2749 else if (Ustrcmp(argrest, "CS") == 0)
2750 {
2751 smtp_use_size = TRUE;
2752 break;
2753 }
2754
2755 /* -MCT: set the tls_offered flag; this is useful only when it
2756 precedes -MC (see above). The flag indicates that the host to which
2757 Exim is connected has offered TLS support. */
2758
2759 #ifdef SUPPORT_TLS
2760 else if (Ustrcmp(argrest, "CT") == 0)
2761 {
2762 tls_offered = TRUE;
2763 break;
2764 }
2765 #endif
2766
2767 /* -M[x]: various operations on the following list of message ids:
2768 -M deliver the messages, ignoring next retry times and thawing
2769 -Mc deliver the messages, checking next retry times, no thawing
2770 -Mf freeze the messages
2771 -Mg give up on the messages
2772 -Mt thaw the messages
2773 -Mrm remove the messages
2774 In the above cases, this must be the last option. There are also the
2775 following options which are followed by a single message id, and which
2776 act on that message. Some of them use the "recipient" addresses as well.
2777 -Mar add recipient(s)
2778 -Mmad mark all recipients delivered
2779 -Mmd mark recipients(s) delivered
2780 -Mes edit sender
0ef732d9 2781 -Mset load a message for use with -be
059ec3d9 2782 -Mvb show body
a96603a0 2783 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2784 -Mvh show header
2785 -Mvl show log
2786 */
2787
2788 else if (*argrest == 0)
2789 {
2790 msg_action = MSG_DELIVER;
2791 forced_delivery = deliver_force_thaw = TRUE;
2792 }
2793 else if (Ustrcmp(argrest, "ar") == 0)
2794 {
2795 msg_action = MSG_ADD_RECIPIENT;
2796 one_msg_action = TRUE;
2797 }
2798 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2799 else if (Ustrcmp(argrest, "es") == 0)
2800 {
2801 msg_action = MSG_EDIT_SENDER;
2802 one_msg_action = TRUE;
2803 }
2804 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2805 else if (Ustrcmp(argrest, "g") == 0)
2806 {
2807 msg_action = MSG_DELIVER;
2808 deliver_give_up = TRUE;
2809 }
2810 else if (Ustrcmp(argrest, "mad") == 0)
2811 {
2812 msg_action = MSG_MARK_ALL_DELIVERED;
2813 }
2814 else if (Ustrcmp(argrest, "md") == 0)
2815 {
2816 msg_action = MSG_MARK_DELIVERED;
2817 one_msg_action = TRUE;
2818 }
2819 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2820 else if (Ustrcmp(argrest, "set") == 0)
2821 {
2822 msg_action = MSG_LOAD;
2823 one_msg_action = TRUE;
2824 }
059ec3d9
PH
2825 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2826 else if (Ustrcmp(argrest, "vb") == 0)
2827 {
2828 msg_action = MSG_SHOW_BODY;
2829 one_msg_action = TRUE;
2830 }
a96603a0
PH
2831 else if (Ustrcmp(argrest, "vc") == 0)
2832 {
2833 msg_action = MSG_SHOW_COPY;
2834 one_msg_action = TRUE;
2835 }
059ec3d9
PH
2836 else if (Ustrcmp(argrest, "vh") == 0)
2837 {
2838 msg_action = MSG_SHOW_HEADER;
2839 one_msg_action = TRUE;
2840 }
2841 else if (Ustrcmp(argrest, "vl") == 0)
2842 {
2843 msg_action = MSG_SHOW_LOG;
2844 one_msg_action = TRUE;
2845 }
2846 else { badarg = TRUE; break; }
2847
2848 /* All the -Mxx options require at least one message id. */
2849
2850 msg_action_arg = i + 1;
2851 if (msg_action_arg >= argc)
2852 {
2853 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2854 return EXIT_FAILURE;
2855 }
2856
2857 /* Some require only message ids to follow */
2858
2859 if (!one_msg_action)
2860 {
2861 int j;
2862 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2863 {
2864 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2865 argv[j], arg);
2866 return EXIT_FAILURE;
2867 }
2868 goto END_ARG; /* Remaining args are ids */
2869 }
2870
2871 /* Others require only one message id, possibly followed by addresses,
2872 which will be handled as normal arguments. */
2873
2874 else
2875 {
2876 if (!mac_ismsgid(argv[msg_action_arg]))
2877 {
2878 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2879 argv[msg_action_arg], arg);
2880 return EXIT_FAILURE;
2881 }
2882 i++;
2883 }
2884 break;
2885
2886
2887 /* Some programs seem to call the -om option without the leading o;
2888 for sendmail it askes for "me too". Exim always does this. */
2889
2890 case 'm':
2891 if (*argrest != 0) badarg = TRUE;
2892 break;
2893
2894
2895 /* -N: don't do delivery - a debugging option that stops transports doing
2896 their thing. It implies debugging at the D_v level. */
2897
2898 case 'N':
2899 if (*argrest == 0)
2900 {
2901 dont_deliver = TRUE;
2902 debug_selector |= D_v;
2903 debug_file = stderr;
2904 }
2905 else badarg = TRUE;
2906 break;
2907
2908
12f69989
PP
2909 /* -n: This means "don't alias" in sendmail, apparently.
2910 For normal invocations, it has no effect.
2911 It may affect some other options. */
059ec3d9
PH
2912
2913 case 'n':
12f69989 2914 flag_n = TRUE;
059ec3d9
PH
2915 break;
2916
2917 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2918 option to the specified value. This form uses long names. We need to handle
2919 -O option=value and -Ooption=value. */
2920
2921 case 'O':
2922 if (*argrest == 0)
2923 {
2924 if (++i >= argc)
2925 {
2926 fprintf(stderr, "exim: string expected after -O\n");
2927 exit(EXIT_FAILURE);
2928 }
2929 }
2930 break;
2931
2932 case 'o':
2933
2934 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2935 file" option). */
2936
2937 if (*argrest == 'A')
2938 {
2939 alias_arg = argrest + 1;
2940 if (alias_arg[0] == 0)
2941 {
2942 if (i+1 < argc) alias_arg = argv[++i]; else
2943 {
2944 fprintf(stderr, "exim: string expected after -oA\n");
2945 exit(EXIT_FAILURE);
2946 }
2947 }
2948 }
2949
2950 /* -oB: Set a connection message max value for remote deliveries */
2951
2952 else if (*argrest == 'B')
2953 {
2954 uschar *p = argrest + 1;
2955 if (p[0] == 0)
2956 {
2957 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2958 {
2959 connection_max_messages = 1;
2960 p = NULL;
2961 }
2962 }
2963
2964 if (p != NULL)
2965 {
2966 if (!isdigit(*p))
2967 {
2968 fprintf(stderr, "exim: number expected after -oB\n");
2969 exit(EXIT_FAILURE);
2970 }
2971 connection_max_messages = Uatoi(p);
2972 }
2973 }
2974
2975 /* -odb: background delivery */
2976
2977 else if (Ustrcmp(argrest, "db") == 0)
2978 {
2979 synchronous_delivery = FALSE;
2980 arg_queue_only = FALSE;
2981 queue_only_set = TRUE;
2982 }
2983
2984 /* -odf: foreground delivery (smail-compatible option); same effect as
2985 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2986 */
2987
2988 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2989 {
2990 synchronous_delivery = TRUE;
2991 arg_queue_only = FALSE;
2992 queue_only_set = TRUE;
2993 }
2994
2995 /* -odq: queue only */
2996
2997 else if (Ustrcmp(argrest, "dq") == 0)
2998 {
2999 synchronous_delivery = FALSE;
3000 arg_queue_only = TRUE;
3001 queue_only_set = TRUE;
3002 }
3003
3004 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3005 but no remote delivery */
3006
3007 else if (Ustrcmp(argrest, "dqs") == 0)
3008 {
3009 queue_smtp = TRUE;
3010 arg_queue_only = FALSE;
3011 queue_only_set = TRUE;
3012 }
3013
3014 /* -oex: Sendmail error flags. As these are also accepted without the
3015 leading -o prefix, for compatibility with vacation and other callers,
3016 they are handled with -e above. */
3017
3018 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3019 -oitrue: Another sendmail syntax for the same */
3020
3021 else if (Ustrcmp(argrest, "i") == 0 ||
3022 Ustrcmp(argrest, "itrue") == 0)
3023 dot_ends = FALSE;
3024
3025 /* -oM*: Set various characteristics for an incoming message; actually
3026 acted on for trusted callers only. */
3027
3028 else if (*argrest == 'M')
3029 {
3030 if (i+1 >= argc)
3031 {
3032 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3033 exit(EXIT_FAILURE);
3034 }
3035
3036 /* -oMa: Set sender host address */
3037
3038 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3039
3040 /* -oMaa: Set authenticator name */
3041
3042 else if (Ustrcmp(argrest, "Maa") == 0)
3043 sender_host_authenticated = argv[++i];
3044
3045 /* -oMas: setting authenticated sender */
3046
3047 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3048
3049 /* -oMai: setting authenticated id */
3050
3051 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3052
3053 /* -oMi: Set incoming interface address */
3054
3055 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3056
d2af03f4
HS
3057 /* -oMm: Message reference */
3058
3059 else if (Ustrcmp(argrest, "Mm") == 0)
3060 {
3061 if (!mac_ismsgid(argv[i+1]))
3062 {
3063 fprintf(stderr,"-oMm must be a valid message ID\n");
3064 exit(EXIT_FAILURE);
3065 }
3066 if (!trusted_config)
3067 {
3068 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3069 exit(EXIT_FAILURE);
3070 }
3071 message_reference = argv[++i];
3072 }
3073
059ec3d9
PH
3074 /* -oMr: Received protocol */
3075
3076 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3077
3078 /* -oMs: Set sender host name */
3079
3080 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3081
3082 /* -oMt: Set sender ident */
3083
33d73e3b
PH
3084 else if (Ustrcmp(argrest, "Mt") == 0)
3085 {
3086 sender_ident_set = TRUE;
3087 sender_ident = argv[++i];
3088 }
059ec3d9
PH
3089
3090 /* Else a bad argument */
3091
3092 else
3093 {
3094 badarg = TRUE;
3095 break;
3096 }
3097 }
3098
3099 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3100 seem to call this as -m (undocumented), so that is also accepted (see
3101 above). */
3102
3103 else if (Ustrcmp(argrest, "m") == 0) {}
3104
3105 /* -oo: An ancient flag for old-style addresses which still seems to
3106 crop up in some calls (see in SCO). */
3107
3108 else if (Ustrcmp(argrest, "o") == 0) {}
3109
3110 /* -oP <name>: set pid file path for daemon */
3111
3112 else if (Ustrcmp(argrest, "P") == 0)
3113 override_pid_file_path = argv[++i];
3114
3115 /* -or <n>: set timeout for non-SMTP acceptance
3116 -os <n>: set timeout for SMTP acceptance */
3117
3118 else if (*argrest == 'r' || *argrest == 's')
3119 {
3120 int *tp = (*argrest == 'r')?
3121 &arg_receive_timeout : &arg_smtp_receive_timeout;
3122 if (argrest[1] == 0)
3123 {
3124 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3125 }
3126 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3127 if (*tp < 0)
3128 {
3129 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3130 exit(EXIT_FAILURE);
3131 }
3132 }
3133
3134 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3135
3136 else if (Ustrcmp(argrest, "X") == 0)
3137 override_local_interfaces = argv[++i];
3138
3139 /* Unknown -o argument */
3140
3141 else badarg = TRUE;
3142 break;
3143
3144
3145 /* -ps: force Perl startup; -pd force delayed Perl startup */
3146
3147 case 'p':
3148 #ifdef EXIM_PERL
3149 if (*argrest == 's' && argrest[1] == 0)
3150 {
3151 perl_start_option = 1;
3152 break;
3153 }
3154 if (*argrest == 'd' && argrest[1] == 0)
3155 {
3156 perl_start_option = -1;
3157 break;
3158 }
3159 #endif
3160
3161 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3162 which sets the host protocol and host name */
3163
3164 if (*argrest == 0)
3165 {
3166 if (i+1 < argc) argrest = argv[++i]; else
3167 { badarg = TRUE; break; }
3168 }
3169
3170 if (*argrest != 0)
3171 {
3172 uschar *hn = Ustrchr(argrest, ':');
3173 if (hn == NULL)
3174 {
3175 received_protocol = argrest;
3176 }
3177 else
3178 {
3179 received_protocol = string_copyn(argrest, hn - argrest);
3180 sender_host_name = hn + 1;
3181 }
3182 }
3183 break;
3184
3185
3186 case 'q':
3187 receiving_message = FALSE;
3cc66b45
PH
3188 if (queue_interval >= 0)
3189 {
3190 fprintf(stderr, "exim: -q specified more than once\n");
3191 exit(EXIT_FAILURE);
3192 }
059ec3d9
PH
3193
3194 /* -qq...: Do queue runs in a 2-stage manner */
3195
3196 if (*argrest == 'q')
3197 {
3198 queue_2stage = TRUE;
3199 argrest++;
3200 }
3201
3202 /* -qi...: Do only first (initial) deliveries */
3203
3204 if (*argrest == 'i')
3205 {
3206 queue_run_first_delivery = TRUE;
3207 argrest++;
3208 }
3209
3210 /* -qf...: Run the queue, forcing deliveries
3211 -qff..: Ditto, forcing thawing as well */
3212
3213 if (*argrest == 'f')
3214 {
3215 queue_run_force = TRUE;
3216 if (*(++argrest) == 'f')
3217 {
3218 deliver_force_thaw = TRUE;
3219 argrest++;
3220 }
3221 }
3222
3223 /* -q[f][f]l...: Run the queue only on local deliveries */
3224
3225 if (*argrest == 'l')
3226 {
3227 queue_run_local = TRUE;
3228 argrest++;
3229 }
3230
3231 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3232 optionally starting from a given message id. */
3233
3234 if (*argrest == 0 &&
3235 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3236 {
3237 queue_interval = 0;
3238 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3239 start_queue_run_id = argv[++i];
3240 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3241 stop_queue_run_id = argv[++i];
3242 }
3243
3244 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3245 optionally local only. */
3246
3247 else
3248 {
3249 if (*argrest != 0)
3250 queue_interval = readconf_readtime(argrest, 0, FALSE);
3251 else
3252 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3253 if (queue_interval <= 0)
3254 {
3255 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3256 exit(EXIT_FAILURE);
3257 }
3258 }
3259 break;
3260
3261
3262 case 'R': /* Synonymous with -qR... */
3263 receiving_message = FALSE;
3264
3265 /* -Rf: As -R (below) but force all deliveries,
3266 -Rff: Ditto, but also thaw all frozen messages,
3267 -Rr: String is regex
3268 -Rrf: Regex and force
3269 -Rrff: Regex and force and thaw
3270
3271 in all cases provided there are no further characters in this
3272 argument. */
3273
3274 if (*argrest != 0)
3275 {
3276 int i;
3277 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3278 {
3279 if (Ustrcmp(argrest, rsopts[i]) == 0)
3280 {
3281 if (i != 2) queue_run_force = TRUE;
3282 if (i >= 2) deliver_selectstring_regex = TRUE;
3283 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3284 argrest += Ustrlen(rsopts[i]);
3285 }
3286 }
3287 }
3288
3289 /* -R: Set string to match in addresses for forced queue run to
3290 pick out particular messages. */
3291
3292 if (*argrest == 0)
3293 {
3294 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3295 {
3296 fprintf(stderr, "exim: string expected after -R\n");
3297 exit(EXIT_FAILURE);
3298 }
3299 }
3300 else deliver_selectstring = argrest;
059ec3d9
PH
3301 break;
3302
3303
3304 /* -r: an obsolete synonym for -f (see above) */
3305
3306
3307 /* -S: Like -R but works on sender. */
3308
3309 case 'S': /* Synonymous with -qS... */
3310 receiving_message = FALSE;
3311
3312 /* -Sf: As -S (below) but force all deliveries,
3313 -Sff: Ditto, but also thaw all frozen messages,
3314 -Sr: String is regex
3315 -Srf: Regex and force
3316 -Srff: Regex and force and thaw
3317
3318 in all cases provided there are no further characters in this
3319 argument. */
3320
3321 if (*argrest != 0)
3322 {
3323 int i;
3324 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3325 {
3326 if (Ustrcmp(argrest, rsopts[i]) == 0)
3327 {
3328 if (i != 2) queue_run_force = TRUE;
3329 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3330 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3331 argrest += Ustrlen(rsopts[i]);
3332 }
3333 }
3334 }
3335
3336 /* -S: Set string to match in addresses for forced queue run to
3337 pick out particular messages. */
3338
3339 if (*argrest == 0)
3340 {
3341 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3342 {
3343 fprintf(stderr, "exim: string expected after -S\n");
3344 exit(EXIT_FAILURE);
3345 }
3346 }
3347 else deliver_selectstring_sender = argrest;
059ec3d9
PH
3348 break;
3349
3350 /* -Tqt is an option that is exclusively for use by the testing suite.
3351 It is not recognized in other circumstances. It allows for the setting up
3352 of explicit "queue times" so that various warning/retry things can be
3353 tested. Otherwise variability of clock ticks etc. cause problems. */
3354
3355 case 'T':
3356 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3357 fudged_queue_times = argv[++i];
3358 else badarg = TRUE;
3359 break;
3360
3361
3362 /* -t: Set flag to extract recipients from body of message. */
3363
3364 case 't':
3365 if (*argrest == 0) extract_recipients = TRUE;
3366
3367 /* -ti: Set flag to extract recipients from body of message, and also
3368 specify that dot does not end the message. */
3369
3370 else if (Ustrcmp(argrest, "i") == 0)
3371 {
3372 extract_recipients = TRUE;
3373 dot_ends = FALSE;
3374 }
3375
3376 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3377
3378 #ifdef SUPPORT_TLS
817d9f57 3379 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3380 #endif
3381
3382 else badarg = TRUE;
3383 break;
3384
3385
3386 /* -U: This means "initial user submission" in sendmail, apparently. The
3387 doc claims that in future sendmail may refuse syntactically invalid
3388 messages instead of fixing them. For the moment, we just ignore it. */
3389
3390 case 'U':
3391 break;
3392
3393
3394 /* -v: verify things - this is a very low-level debugging */
3395
3396 case 'v':
3397 if (*argrest == 0)
3398 {
3399 debug_selector |= D_v;
3400 debug_file = stderr;
3401 }
3402 else badarg = TRUE;
3403 break;
3404
3405
3406 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3407
3408 The -x flag tells the sendmail command that mail from a local
3409 mail program has National Language Support (NLS) extended characters
3410 in the body of the mail item. The sendmail command can send mail with
3411 extended NLS characters across networks that normally corrupts these
3412 8-bit characters.
3413
3414 As Exim is 8-bit clean, it just ignores this flag. */
3415
3416 case 'x':
3417 if (*argrest != 0) badarg = TRUE;
3418 break;
3419
a3fb9793
PP
3420 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3421 logs to that file. We swallow the parameter and otherwise ignore it. */
3422
3423 case 'X':
3424 if (*argrest == '\0')
a3fb9793
PP
3425 if (++i >= argc)
3426 {
3427 fprintf(stderr, "exim: string expected after -X\n");
3428 exit(EXIT_FAILURE);
3429 }
0ad2e0fc
JH
3430 break;
3431
3432 case 'z':
3433 if (*argrest == '\0')
3434 if (++i < argc) log_oneline = argv[i]; else
3435 {
3436 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3437 exit(EXIT_FAILURE);
3438 }
a3fb9793
PP
3439 break;
3440
059ec3d9
PH
3441 /* All other initial characters are errors */
3442
3443 default:
3444 badarg = TRUE;
3445 break;
3446 } /* End of high-level switch statement */
3447
3448 /* Failed to recognize the option, or syntax error */
3449
3450 if (badarg)
3451 {
3452 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3453 "option %s\n", arg);
3454 exit(EXIT_FAILURE);
3455 }
3456 }
3457
3458
3cc66b45
PH
3459/* If -R or -S have been specified without -q, assume a single queue run. */
3460
3461if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3462 queue_interval < 0) queue_interval = 0;
3463
3464
059ec3d9 3465END_ARG:
81ea09ca
NM
3466/* If usage_wanted is set we call the usage function - which never returns */
3467if (usage_wanted) exim_usage(called_as);
3468
3469/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3470if ((
3471 (smtp_input || extract_recipients || recipients_arg < argc) &&
3472 (daemon_listen || queue_interval >= 0 || bi_option ||
3473 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3474 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3475 ) ||
3476 (
3477 msg_action_arg > 0 &&
0ef732d9
PH
3478 (daemon_listen || queue_interval >= 0 || list_options ||
3479 (checking && msg_action != MSG_LOAD) ||
3480 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3481 ) ||
3482 (
3483 (daemon_listen || queue_interval >= 0) &&
3484 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3485 bi_option)
059ec3d9
PH
3486 ) ||
3487 (
3488 daemon_listen && queue_interval == 0
3489 ) ||
3490 (
9ee44efb
PP
3491 inetd_wait_mode && queue_interval >= 0
3492 ) ||
3493 (
059ec3d9
PH
3494 list_options &&
3495 (checking || smtp_input || extract_recipients ||
f05da2e8 3496 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3497 ) ||
3498 (
3499 verify_address_mode &&
3500 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3501 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3502 ) ||
3503 (
3504 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3505 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3506 ) ||
3507 (
f05da2e8 3508 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3509 extract_recipients)
3510 ) ||
3511 (
3512 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3513 ) ||
3514 (
3515 msg_action == MSG_LOAD &&
3516 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3517 )
3518 )
3519 {
3520 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3521 exit(EXIT_FAILURE);
3522 }
3523
3524/* If debugging is set up, set the file and the file descriptor to pass on to
3525child processes. It should, of course, be 2 for stderr. Also, force the daemon
3526to run in the foreground. */
3527
3528if (debug_selector != 0)
3529 {
3530 debug_file = stderr;
3531 debug_fd = fileno(debug_file);
3532 background_daemon = FALSE;
3533 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3534 if (debug_selector != D_v) /* -v only doesn't show this */
3535 {
3536 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3537 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3538 debug_selector);
6545de78
PP
3539 if (!version_printed)
3540 show_whats_supported(stderr);
059ec3d9
PH
3541 }
3542 }
3543
3544/* When started with root privilege, ensure that the limits on the number of
3545open files and the number of processes (where that is accessible) are
3546sufficiently large, or are unset, in case Exim has been called from an
3547environment where the limits are screwed down. Not all OS have the ability to
3548change some of these limits. */
3549
3550if (unprivileged)
3551 {
3552 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3553 }
3554else
3555 {
3556 struct rlimit rlp;
3557
3558 #ifdef RLIMIT_NOFILE
3559 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3560 {
3561 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3562 strerror(errno));
3563 rlp.rlim_cur = rlp.rlim_max = 0;
3564 }
eb2c0248
PH
3565
3566 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3567 be exceeded. It turns out that some older OS have a fixed upper limit of
3568 256. */
eb2c0248 3569
059ec3d9
PH
3570 if (rlp.rlim_cur < 1000)
3571 {
3572 rlp.rlim_cur = rlp.rlim_max = 1000;
3573 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3574 {
a494b1e1
PH
3575 rlp.rlim_cur = rlp.rlim_max = 256;
3576 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3577 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3578 strerror(errno));
eb2c0248 3579 }
059ec3d9
PH
3580 }
3581 #endif
3582
3583 #ifdef RLIMIT_NPROC
3584 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3585 {
3586 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3587 strerror(errno));
3588 rlp.rlim_cur = rlp.rlim_max = 0;
3589 }
3590
3591 #ifdef RLIM_INFINITY
3592 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3593 {
3594 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3595 #else
3596 if (rlp.rlim_cur < 1000)
3597 {
3598 rlp.rlim_cur = rlp.rlim_max = 1000;
3599 #endif
3600 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3601 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3602 strerror(errno));
3603 }
3604 #endif
3605 }
3606
3607/* Exim is normally entered as root (but some special configurations are
3608possible that don't do this). However, it always spins off sub-processes that
3609set their uid and gid as required for local delivery. We don't want to pass on
3610any extra groups that root may belong to, so we want to get rid of them all at
3611this point.
3612
3613We need to obey setgroups() at this stage, before possibly giving up root
3614privilege for a changed configuration file, but later on we might need to
3615check on the additional groups for the admin user privilege - can't do that
3616till after reading the config, which might specify the exim gid. Therefore,
3617save the group list here first. */
3618
3619group_count = getgroups(NGROUPS_MAX, group_list);
cd59ab18
PP
3620if (group_count < 0)
3621 {
3622 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3623 exit(EXIT_FAILURE);
3624 }
059ec3d9
PH
3625
3626/* There is a fundamental difference in some BSD systems in the matter of
3627groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3628known not to be different. On the "different" systems there is a single group
3629list, and the first entry in it is the current group. On all other versions of
3630Unix there is a supplementary group list, which is in *addition* to the current
3631group. Consequently, to get rid of all extraneous groups on a "standard" system
3632you pass over 0 groups to setgroups(), while on a "different" system you pass
3633over a single group - the current group, which is always the first group in the
3634list. Calling setgroups() with zero groups on a "different" system results in
3635an error return. The following code should cope with both types of system.
3636
3637However, if this process isn't running as root, setgroups() can't be used
3638since you have to be root to run it, even if throwing away groups. Not being
3639root here happens only in some unusual configurations. We just ignore the
3640error. */
3641
3642if (setgroups(0, NULL) != 0)
3643 {
3644 if (setgroups(1, group_list) != 0 && !unprivileged)
3645 {
3646 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3647 exit(EXIT_FAILURE);
3648 }
3649 }
3650
3651/* If the configuration file name has been altered by an argument on the
3652command line (either a new file name or a macro definition) and the caller is
cd25e41d
DW
3653not root, or if this is a filter testing run, remove any setuid privilege the
3654program has and run as the underlying user.
059ec3d9 3655
cd25e41d
DW
3656The exim user is locked out of this, which severely restricts the use of -C
3657for some purposes.
059ec3d9
PH
3658
3659Otherwise, set the real ids to the effective values (should be root unless run
3660from inetd, which it can either be root or the exim uid, if one is configured).
3661
3662There is a private mechanism for bypassing some of this, in order to make it
3663possible to test lots of configurations automatically, without having either to
3664recompile each time, or to patch in an actual configuration file name and other
3665values (such as the path name). If running in the test harness, pretend that
3666configuration file changes and macro definitions haven't happened. */
3667
3668if (( /* EITHER */
a7cbbf50
PP
3669 (!trusted_config || /* Config changed, or */
3670 !macros_trusted()) && /* impermissible macros and */
059ec3d9 3671 real_uid != root_uid && /* Not root, and */
059ec3d9
PH
3672 !running_in_test_harness /* Not fudged */
3673 ) || /* OR */
3674 expansion_test /* expansion testing */
3675 || /* OR */
f05da2e8 3676 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3677 {
3678 setgroups(group_count, group_list);
3679 exim_setugid(real_uid, real_gid, FALSE,
3680 US"-C, -D, -be or -bf forces real uid");
3681 removed_privilege = TRUE;
3682
3683 /* In the normal case when Exim is called like this, stderr is available
3684 and should be used for any logging information because attempts to write
3685 to the log will usually fail. To arrange this, we unset really_exim. However,
3686 if no stderr is available there is no point - we might as well have a go
b7487bce 3687 at the log (if it fails, syslog will be written).
059ec3d9 3688
b7487bce
PP
3689 Note that if the invoker is Exim, the logs remain available. Messing with
3690 this causes unlogged successful deliveries. */
3691
3692 if ((log_stderr != NULL) && (real_uid != exim_uid))
3693 really_exim = FALSE;
059ec3d9
PH
3694 }
3695
3696/* Privilege is to be retained for the moment. It may be dropped later,
3697depending on the job that this Exim process has been asked to do. For now, set
3698the real uid to the effective so that subsequent re-execs of Exim are done by a
3699privileged user. */
3700
3701else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3702
f05da2e8 3703/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3704setups and reading the message. */
3705
f05da2e8
PH
3706if ((filter_test & FTEST_SYSTEM) != 0)
3707 {
3708 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3709 if (filter_sfd < 0)
3710 {
3711 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3712 strerror(errno));
3713 return EXIT_FAILURE;
3714 }
3715 }
3716
3717if ((filter_test & FTEST_USER) != 0)
059ec3d9 3718 {
f05da2e8
PH
3719 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3720 if (filter_ufd < 0)
059ec3d9 3721 {
f05da2e8 3722 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3723 strerror(errno));
3724 return EXIT_FAILURE;
3725 }
3726 }
3727
8829633f
PP
3728/* Initialise lookup_list
3729If debugging, already called above via version reporting.
3730In either case, we initialise the list of available lookups while running
3731as root. All dynamically modules are loaded from a directory which is
3732hard-coded into the binary and is code which, if not a module, would be
3733part of Exim already. Ability to modify the content of the directory
3734is equivalent to the ability to modify a setuid binary!
3735
3736This needs to happen before we read the main configuration. */
3737init_lookup_list();
3738
9d4319df
JH
3739#ifdef EXPERIMENTAL_INTERNATIONAL
3740if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3741#endif
3742
059ec3d9
PH
3743/* Read the main runtime configuration data; this gives up if there
3744is a failure. It leaves the configuration file open so that the subsequent
3745configuration data for delivery can be read if needed. */
3746
3747readconf_main();
3748
a3fb9793
PP
3749/* If an action on specific messages is requested, or if a daemon or queue
3750runner is being started, we need to know if Exim was called by an admin user.
3751This is the case if the real user is root or exim, or if the real group is
3752exim, or if one of the supplementary groups is exim or a group listed in
3753admin_groups. We don't fail all message actions immediately if not admin_user,
3754since some actions can be performed by non-admin users. Instead, set admin_user
3755for later interrogation. */
3756
3757if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3758 admin_user = TRUE;
3759else
3760 {
3761 int i, j;
3762 for (i = 0; i < group_count; i++)
3763 {
3764 if (group_list[i] == exim_gid) admin_user = TRUE;
3765 else if (admin_groups != NULL)
3766 {
3767 for (j = 1; j <= (int)(admin_groups[0]); j++)
3768 if (admin_groups[j] == group_list[i])
3769 { admin_user = TRUE; break; }
3770 }
3771 if (admin_user) break;
3772 }
3773 }
3774
3775/* Another group of privileged users are the trusted users. These are root,
3776exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3777are permitted to specify sender_addresses with -f on the command line, and
3778other message parameters as well. */
3779
3780if (real_uid == root_uid || real_uid == exim_uid)
3781 trusted_caller = TRUE;
3782else
3783 {
3784 int i, j;
3785
3786 if (trusted_users != NULL)
3787 {
3788 for (i = 1; i <= (int)(trusted_users[0]); i++)
3789 if (trusted_users[i] == real_uid)
3790 { trusted_caller = TRUE; break; }
3791 }
3792
3793 if (!trusted_caller && trusted_groups != NULL)
3794 {
3795 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3796 {
3797 if (trusted_groups[i] == real_gid)
3798 trusted_caller = TRUE;
3799 else for (j = 0; j < group_count; j++)
3800 {
3801 if (trusted_groups[i] == group_list[j])
3802 { trusted_caller = TRUE; break; }
3803 }
3804 if (trusted_caller) break;
3805 }
3806 }
3807 }
3808
059ec3d9
PH
3809/* Handle the decoding of logging options. */
3810
6c6d6e48 3811decode_bits(log_selector, log_selector_size, log_notall,
ed7f7860 3812 log_selector_string, log_options, log_options_count, US"log", 0);
059ec3d9
PH
3813
3814DEBUG(D_any)
3815 {
6c6d6e48 3816 int i;
059ec3d9 3817 debug_printf("configuration file is %s\n", config_main_filename);
6c6d6e48
TF
3818 debug_printf("log selectors =");
3819 for (i = 0; i < log_selector_size; i++)
3820 debug_printf(" %08x", log_selector[i]);
3821 debug_printf("\n");
059ec3d9
PH
3822 }
3823
3824/* If domain literals are not allowed, check the sender address that was
3825supplied with -f. Ditto for a stripped trailing dot. */
3826
3827if (sender_address != NULL)
3828 {
3829 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3830 {
3831 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3832 "allowed\n", sender_address);
3833 return EXIT_FAILURE;
3834 }
3835 if (f_end_dot && !strip_trailing_dot)
3836 {
3837 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3838 "(trailing dot not allowed)\n", sender_address);
3839 return EXIT_FAILURE;
3840 }
3841 }
3842
a3fb9793
PP
3843/* See if an admin user overrode our logging. */
3844
3845if (cmdline_syslog_name != NULL)
3846 {
3847 if (admin_user)
3848 {
3849 syslog_processname = cmdline_syslog_name;
3850 log_file_path = string_copy(CUS"syslog");
3851 }
3852 else
3853 {
3854 /* not a panic, non-privileged users should not be able to spam paniclog */
3855 fprintf(stderr,
3856 "exim: you lack sufficient privilege to specify syslog process name\n");
3857 return EXIT_FAILURE;
3858 }
3859 }
3860
059ec3d9
PH
3861/* Paranoia check of maximum lengths of certain strings. There is a check
3862on the length of the log file path in log.c, which will come into effect
3863if there are any calls to write the log earlier than this. However, if we
3864get this far but the string is very long, it is better to stop now than to
3865carry on and (e.g.) receive a message and then have to collapse. The call to
3866log_write() from here will cause the ultimate panic collapse if the complete
3867file name exceeds the buffer length. */
3868
3869if (Ustrlen(log_file_path) > 200)
3870 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3871 "log_file_path is longer than 200 chars: aborting");
3872
3873if (Ustrlen(pid_file_path) > 200)
3874 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3875 "pid_file_path is longer than 200 chars: aborting");
3876
3877if (Ustrlen(spool_directory) > 200)
3878 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3879 "spool_directory is longer than 200 chars: aborting");
3880
3881/* Length check on the process name given to syslog for its TAG field,
3882which is only permitted to be 32 characters or less. See RFC 3164. */
3883
3884if (Ustrlen(syslog_processname) > 32)
3885 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3886 "syslog_processname is longer than 32 chars: aborting");
3887
0ad2e0fc
JH
3888if (log_oneline)
3889 {
3890 if (admin_user)
3891 {
3892 log_write(0, LOG_MAIN, "%s", log_oneline);
3893 return EXIT_SUCCESS;
3894 }
3895 else
3896 return EXIT_FAILURE;
3897 }
3898
059ec3d9
PH
3899/* In some operating systems, the environment variable TMPDIR controls where
3900temporary files are created; Exim doesn't use these (apart from when delivering
3901to MBX mailboxes), but called libraries such as DBM libraries may require them.
3902If TMPDIR is found in the environment, reset it to the value defined in the
3903TMPDIR macro, if this macro is defined. */
3904
3905#ifdef TMPDIR
3906 {
3907 uschar **p;
3908 for (p = USS environ; *p != NULL; p++)
3909 {
3910 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3911 Ustrcmp(*p+7, TMPDIR) != 0)
3912 {
3913 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3914 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3915 *p = newp;
3916 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3917 }
3918 }
3919 }
3920#endif
3921
3922/* Timezone handling. If timezone_string is "utc", set a flag to cause all
3923timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3924we may need to get rid of a bogus timezone setting. This can arise when Exim is
3925called by a user who has set the TZ variable. This then affects the timestamps
3926in log files and in Received: headers, and any created Date: header lines. The
3927required timezone is settable in the configuration file, so nothing can be done
3928about this earlier - but hopefully nothing will normally be logged earlier than
3929this. We have to make a new environment if TZ is wrong, but don't bother if
3930timestamps_utc is set, because then all times are in UTC anyway. */
3931
3932if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3933 {
3934 timestamps_utc = TRUE;
3935 }
3936else
3937 {
3938 uschar *envtz = US getenv("TZ");
3939 if ((envtz == NULL && timezone_string != NULL) ||
3940 (envtz != NULL &&
3941 (timezone_string == NULL ||
3942 Ustrcmp(timezone_string, envtz) != 0)))
3943 {
3944 uschar **p = USS environ;
3945 uschar **new;
3946 uschar **newp;
3947 int count = 0;
3948 while (*p++ != NULL) count++;
3949 if (envtz == NULL) count++;
3950 newp = new = malloc(sizeof(uschar *) * (count + 1));
3951 for (p = USS environ; *p != NULL; p++)
3952 {
3953 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3954 *newp++ = *p;
3955 }
3956 if (timezone_string != NULL)
3957 {
3958 *newp = malloc(Ustrlen(timezone_string) + 4);
3959 sprintf(CS *newp++, "TZ=%s", timezone_string);
3960 }
3961 *newp = NULL;
3962 environ = CSS new;
3963 tzset();
3964 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3965 tod_stamp(tod_log));
3966 }
3967 }
3968
3969/* Handle the case when we have removed the setuid privilege because of -C or
cd25e41d 3970-D. This means that the caller of Exim was not root.
059ec3d9 3971
cd25e41d
DW
3972There is a problem if we were running as the Exim user. The sysadmin may
3973expect this case to retain privilege because "the binary was called by the
3974Exim user", but it hasn't, because either the -D option set macros, or the
261dc43e 3975-C option set a non-trusted configuration file. There are two possibilities:
059ec3d9
PH
3976
3977 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3978 to do message deliveries. Thus, the fact that it is running as a
3979 non-privileged user is plausible, and might be wanted in some special
3980 configurations. However, really_exim will have been set false when
3981 privilege was dropped, to stop Exim trying to write to its normal log
3982 files. Therefore, re-enable normal log processing, assuming the sysadmin
3983 has set up the log directory correctly.
3984
3985 (2) If deliver_drop_privilege is not set, the configuration won't work as
3986 apparently intended, and so we log a panic message. In order to retain
261dc43e
DW
3987 root for -C or -D, the caller must either be root or be invoking a
3988 trusted configuration file (when deliver_drop_privilege is false). */
059ec3d9 3989
e2f5dc15 3990if (removed_privilege && (!trusted_config || macros != NULL) &&
059ec3d9
PH
3991 real_uid == exim_uid)
3992 {
059ec3d9
PH
3993 if (deliver_drop_privilege)
3994 really_exim = TRUE; /* let logging work normally */
3995 else
3996 log_write(0, LOG_MAIN|LOG_PANIC,
cd25e41d 3997 "exim user lost privilege for using %s option",
90b6341f 3998 trusted_config? "-D" : "-C");
059ec3d9
PH
3999 }
4000
4001/* Start up Perl interpreter if Perl support is configured and there is a
4002perl_startup option, and the configuration or the command line specifies
4003initializing starting. Note that the global variables are actually called
4004opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
4005
4006#ifdef EXIM_PERL
4007if (perl_start_option != 0)