Add the Exim version to process info (exiwhat)
[exim.git] / src / src / exim.c
CommitLineData
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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
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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 };
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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
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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);
059ec3d9
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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;
1495BOOL local_queue_only;
1496BOOL more = TRUE;
1497BOOL one_msg_action = FALSE;
1498BOOL queue_only_set = FALSE;
1499BOOL receiving_message = TRUE;
33d73e3b 1500BOOL sender_ident_set = FALSE;
8669f003 1501BOOL session_local_queue_only;
059ec3d9
PH
1502BOOL unprivileged;
1503BOOL removed_privilege = FALSE;
81ea09ca 1504BOOL usage_wanted = FALSE;
059ec3d9
PH
1505BOOL verify_address_mode = FALSE;
1506BOOL verify_as_sender = FALSE;
1507BOOL version_printed = FALSE;
1508uschar *alias_arg = NULL;
1509uschar *called_as = US"";
a3fb9793 1510uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1511uschar *start_queue_run_id = NULL;
1512uschar *stop_queue_run_id = NULL;
328895cc 1513uschar *expansion_test_message = NULL;
059ec3d9
PH
1514uschar *ftest_domain = NULL;
1515uschar *ftest_localpart = NULL;
1516uschar *ftest_prefix = NULL;
1517uschar *ftest_suffix = NULL;
0ad2e0fc 1518uschar *log_oneline = NULL;
8544e77a 1519uschar *malware_test_file = NULL;
059ec3d9
PH
1520uschar *real_sender_address;
1521uschar *originator_home = US"/";
a3fb9793 1522size_t sz;
059ec3d9
PH
1523void *reset_point;
1524
1525struct passwd *pw;
1526struct stat statbuf;
1527pid_t passed_qr_pid = (pid_t)0;
1528int passed_qr_pipe = -1;
1529gid_t group_list[NGROUPS_MAX];
1530
98a90c36
PP
1531/* For the -bI: flag */
1532enum commandline_info info_flag = CMDINFO_NONE;
1533BOOL info_stdout = FALSE;
1534
059ec3d9
PH
1535/* Possible options for -R and -S */
1536
1537static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1538
1539/* Need to define this in case we need to change the environment in order
1540to get rid of a bogus time zone. We have to make it char rather than uschar
1541because some OS define it in /usr/include/unistd.h. */
1542
1543extern char **environ;
1544
35edf2ff 1545/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1546defined by ref:name at build time, we must now find the actual uid/gid values.
1547This is a feature to make the lives of binary distributors easier. */
1548
1549#ifdef EXIM_USERNAME
1550if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1551 {
10385c15
PP
1552 if (exim_uid == 0)
1553 {
1554 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1555 EXIM_USERNAME);
1556 exit(EXIT_FAILURE);
1557 }
084c1d8c
PP
1558 /* If ref:name uses a number as the name, route_finduser() returns
1559 TRUE with exim_uid set and pw coerced to NULL. */
1560 if (pw)
1561 exim_gid = pw->pw_gid;
1562#ifndef EXIM_GROUPNAME
1563 else
1564 {
1565 fprintf(stderr,
1566 "exim: ref:name should specify a usercode, not a group.\n"
1567 "exim: can't let you get away with it unless you also specify a group.\n");
1568 exit(EXIT_FAILURE);
1569 }
1570#endif
059ec3d9
PH
1571 }
1572else
1573 {
1574 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1575 EXIM_USERNAME);
1576 exit(EXIT_FAILURE);
1577 }
1578#endif
1579
1580#ifdef EXIM_GROUPNAME
1581if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1582 {
1583 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1584 EXIM_GROUPNAME);
1585 exit(EXIT_FAILURE);
1586 }
1587#endif
1588
1589#ifdef CONFIGURE_OWNERNAME
1590if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1591 {
1592 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1593 CONFIGURE_OWNERNAME);
1594 exit(EXIT_FAILURE);
1595 }
1596#endif
1597
79d4bc3d
PP
1598/* We default the system_filter_user to be the Exim run-time user, as a
1599sane non-root value. */
1600system_filter_uid = exim_uid;
1601
35edf2ff
PH
1602#ifdef CONFIGURE_GROUPNAME
1603if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1604 {
1605 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1606 CONFIGURE_GROUPNAME);
1607 exit(EXIT_FAILURE);
1608 }
1609#endif
1610
059ec3d9
PH
1611/* In the Cygwin environment, some initialization needs doing. It is fudged
1612in by means of this macro. */
1613
1614#ifdef OS_INIT
1615OS_INIT
1616#endif
1617
1618/* Check a field which is patched when we are running Exim within its
1619testing harness; do a fast initial check, and then the whole thing. */
1620
1621running_in_test_harness =
1622 *running_status == '<' && Ustrcmp(running_status, "<<<testing>>>") == 0;
1623
1624/* The C standard says that the equivalent of setlocale(LC_ALL, "C") is obeyed
1625at the start of a program; however, it seems that some environments do not
1626follow this. A "strange" locale can affect the formatting of timestamps, so we
1627make quite sure. */
1628
1629setlocale(LC_ALL, "C");
1630
1631/* Set up the default handler for timing using alarm(). */
1632
1633os_non_restarting_signal(SIGALRM, sigalrm_handler);
1634
1635/* Ensure we have a buffer for constructing log entries. Use malloc directly,
1636because store_malloc writes a log entry on failure. */
1637
1638log_buffer = (uschar *)malloc(LOG_BUFFER_SIZE);
1639if (log_buffer == NULL)
1640 {
1641 fprintf(stderr, "exim: failed to get store for log buffer\n");
1642 exit(EXIT_FAILURE);
1643 }
1644
6c6d6e48
TF
1645/* Initialize the default log options. */
1646
1647bits_set(log_selector, log_selector_size, log_default);
1648
059ec3d9
PH
1649/* Set log_stderr to stderr, provided that stderr exists. This gets reset to
1650NULL when the daemon is run and the file is closed. We have to use this
1651indirection, because some systems don't allow writing to the variable "stderr".
1652*/
1653
1654if (fstat(fileno(stderr), &statbuf) >= 0) log_stderr = stderr;
1655
1656/* Arrange for the PCRE regex library to use our store functions. Note that
1657the normal calls are actually macros that add additional arguments for
1658debugging purposes so we have to assign specially constructed functions here.
1659The default is to use store in the stacking pool, but this is overridden in the
1660regex_must_compile() function. */
1661
1662pcre_malloc = function_store_get;
1663pcre_free = function_dummy_free;
1664
1665/* Ensure there is a big buffer for temporary use in several places. It is put
1666in malloc store so that it can be freed for enlargement if necessary. */
1667
1668big_buffer = store_malloc(big_buffer_size);
1669
1670/* Set up the handler for the data request signal, and set the initial
1671descriptive text. */
1672
1673set_process_info("initializing");
1674os_restarting_signal(SIGUSR1, usr1_handler);
1675
1676/* SIGHUP is used to get the daemon to reconfigure. It gets set as appropriate
1677in the daemon code. For the rest of Exim's uses, we ignore it. */
1678
1679signal(SIGHUP, SIG_IGN);
1680
1681/* We don't want to die on pipe errors as the code is written to handle
1682the write error instead. */
1683
1684signal(SIGPIPE, SIG_IGN);
1685
1686/* Under some circumstance on some OS, Exim can get called with SIGCHLD
1687set to SIG_IGN. This causes subprocesses that complete before the parent
1688process waits for them not to hang around, so when Exim calls wait(), nothing
1689is there. The wait() code has been made robust against this, but let's ensure
1690that SIGCHLD is set to SIG_DFL, because it's tidier to wait and get a process
1691ending status. We use sigaction rather than plain signal() on those OS where
1692SA_NOCLDWAIT exists, because we want to be sure it is turned off. (There was a
1693problem on AIX with this.) */
1694
1695#ifdef SA_NOCLDWAIT
1696 {
1697 struct sigaction act;
1698 act.sa_handler = SIG_DFL;
1699 sigemptyset(&(act.sa_mask));
1700 act.sa_flags = 0;
1701 sigaction(SIGCHLD, &act, NULL);
1702 }
1703#else
1704signal(SIGCHLD, SIG_DFL);
1705#endif
1706
1707/* Save the arguments for use if we re-exec exim as a daemon after receiving
1708SIGHUP. */
1709
1710sighup_argv = argv;
1711
1712/* Set up the version number. Set up the leading 'E' for the external form of
1713message ids, set the pointer to the internal form, and initialize it to
1714indicate no message being processed. */
1715
1716version_init();
1717message_id_option[0] = '-';
1718message_id_external = message_id_option + 1;
1719message_id_external[0] = 'E';
1720message_id = message_id_external + 1;
1721message_id[0] = 0;
1722
67d175de 1723/* Set the umask to zero so that any files Exim creates using open() are
2632889e
PH
1724created with the modes that it specifies. NOTE: Files created with fopen() have
1725a problem, which was not recognized till rather late (February 2006). With this
1726umask, such files will be world writeable. (They are all content scanning files
1727in the spool directory, which isn't world-accessible, so this is not a
1728disaster, but it's untidy.) I don't want to change this overall setting,
1729however, because it will interact badly with the open() calls. Instead, there's
1730now a function called modefopen() that fiddles with the umask while calling
1731fopen(). */
059ec3d9 1732
67d175de 1733(void)umask(0);
059ec3d9
PH
1734
1735/* Precompile the regular expression for matching a message id. Keep this in
1736step with the code that generates ids in the accept.c module. We need to do
1737this here, because the -M options check their arguments for syntactic validity
1738using mac_ismsgid, which uses this. */
1739
1740regex_ismsgid =
1741 regex_must_compile(US"^(?:[^\\W_]{6}-){2}[^\\W_]{2}$", FALSE, TRUE);
1742
a5bd321b 1743/* Precompile the regular expression that is used for matching an SMTP error
d6a96edc
PH
1744code, possibly extended, at the start of an error message. Note that the
1745terminating whitespace character is included. */
a5bd321b
PH
1746
1747regex_smtp_code =
1748 regex_must_compile(US"^\\d\\d\\d\\s(?:\\d\\.\\d\\d?\\d?\\.\\d\\d?\\d?\\s)?",
1749 FALSE, TRUE);
1750
a7cbbf50
PP
1751#ifdef WHITELIST_D_MACROS
1752/* Precompile the regular expression used to filter the content of macros
1753given to -D for permissibility. */
1754
1755regex_whitelisted_macro =
1756 regex_must_compile(US"^[A-Za-z0-9_/.-]*$", FALSE, TRUE);
1757#endif
1758
f38917cc
JH
1759for (i = 0; i < REGEX_VARS; i++) regex_vars[i] = NULL;
1760
a7cbbf50 1761
059ec3d9
PH
1762/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1763this seems to be a generally accepted convention, since one finds symbolic
1764links called "mailq" in standard OS configurations. */
1765
1766if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1767 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1768 {
1769 list_queue = TRUE;
1770 receiving_message = FALSE;
1771 called_as = US"-mailq";
1772 }
1773
1774/* If the program is called as "rmail" treat it as equivalent to
1775"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1776i.e. preventing a single dot on a line from terminating the message, and
1777returning with zero return code, even in cases of error (provided an error
1778message has been sent). */
1779
1780if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1781 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1782 {
1783 dot_ends = FALSE;
1784 called_as = US"-rmail";
1785 errors_sender_rc = EXIT_SUCCESS;
1786 }
1787
1788/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1789this is a smail convention. */
1790
1791if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1792 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1793 {
1794 smtp_input = smtp_batched_input = TRUE;
1795 called_as = US"-rsmtp";
1796 }
1797
1798/* If the program is called as "runq" treat it as equivalent to "exim -q";
1799this is a smail convention. */
1800
1801if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1802 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1803 {
1804 queue_interval = 0;
1805 receiving_message = FALSE;
1806 called_as = US"-runq";
1807 }
1808
1809/* If the program is called as "newaliases" treat it as equivalent to
1810"exim -bi"; this is a sendmail convention. */
1811
1812if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1813 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1814 {
1815 bi_option = TRUE;
1816 receiving_message = FALSE;
1817 called_as = US"-newaliases";
1818 }
1819
1820/* Save the original effective uid for a couple of uses later. It should
1821normally be root, but in some esoteric environments it may not be. */
1822
1823original_euid = geteuid();
1824
1825/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1826to be the same as the real ones. This makes a difference only if Exim is setuid
1827(or setgid) to something other than root, which could be the case in some
1828special configurations. */
1829
1830real_uid = getuid();
1831real_gid = getgid();
1832
1833if (real_uid == root_uid)
1834 {
1670ef10
PP
1835 rv = setgid(real_gid);
1836 if (rv)
1837 {
1838 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1839 (long int)real_gid, strerror(errno));
1840 exit(EXIT_FAILURE);
1841 }
1842 rv = setuid(real_uid);
1843 if (rv)
1844 {
1845 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1846 (long int)real_uid, strerror(errno));
1847 exit(EXIT_FAILURE);
1848 }
059ec3d9
PH
1849 }
1850
1851/* If neither the original real uid nor the original euid was root, Exim is
1852running in an unprivileged state. */
1853
1854unprivileged = (real_uid != root_uid && original_euid != root_uid);
1855
059ec3d9
PH
1856/* Scan the program's arguments. Some can be dealt with right away; others are
1857simply recorded for checking and handling afterwards. Do a high-level switch
1858on the second character (the one after '-'), to save some effort. */
1859
1860for (i = 1; i < argc; i++)
1861 {
1862 BOOL badarg = FALSE;
1863 uschar *arg = argv[i];
1864 uschar *argrest;
1865 int switchchar;
1866
1867 /* An argument not starting with '-' is the start of a recipients list;
1868 break out of the options-scanning loop. */
1869
1870 if (arg[0] != '-')
1871 {
1872 recipients_arg = i;
1873 break;
1874 }
1875
1876 /* An option consistion of -- terminates the options */
1877
1878 if (Ustrcmp(arg, "--") == 0)
1879 {
1880 recipients_arg = i + 1;
1881 break;
1882 }
1883
1884 /* Handle flagged options */
1885
1886 switchchar = arg[1];
1887 argrest = arg+2;
1888
1889 /* Make all -ex options synonymous with -oex arguments, since that
1890 is assumed by various callers. Also make -qR options synonymous with -R
1891 options, as that seems to be required as well. Allow for -qqR too, and
1892 the same for -S options. */
1893
1894 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1895 Ustrncmp(arg+1, "qR", 2) == 0 ||
1896 Ustrncmp(arg+1, "qS", 2) == 0)
1897 {
1898 switchchar = arg[2];
1899 argrest++;
1900 }
1901 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1902 {
1903 switchchar = arg[3];
1904 argrest += 2;
1905 queue_2stage = TRUE;
1906 }
1907
1908 /* Make -r synonymous with -f, since it is a documented alias */
1909
1910 else if (arg[1] == 'r') switchchar = 'f';
1911
1912 /* Make -ov synonymous with -v */
1913
1914 else if (Ustrcmp(arg, "-ov") == 0)
1915 {
1916 switchchar = 'v';
1917 argrest++;
1918 }
1919
4b2241d2
PP
1920 /* deal with --option_aliases */
1921 else if (switchchar == '-')
1922 {
1923 if (Ustrcmp(argrest, "help") == 0)
1924 {
1925 usage_wanted = TRUE;
1926 break;
1927 }
1928 else if (Ustrcmp(argrest, "version") == 0)
1929 {
1930 switchchar = 'b';
73a46702 1931 argrest = US"V";
4b2241d2
PP
1932 }
1933 }
1934
059ec3d9
PH
1935 /* High-level switch on active initial letter */
1936
1937 switch(switchchar)
1938 {
a3fb9793
PP
1939
1940 /* sendmail uses -Ac and -Am to control which .cf file is used;
1941 we ignore them. */
1942 case 'A':
1943 if (*argrest == '\0') { badarg = TRUE; break; }
1944 else
1945 {
1946 BOOL ignore = FALSE;
1947 switch (*argrest)
1948 {
1949 case 'c':
1950 case 'm':
1951 if (*(argrest + 1) == '\0')
1952 ignore = TRUE;
1953 break;
1954 }
1955 if (!ignore) { badarg = TRUE; break; }
1956 }
1957 break;
1958
059ec3d9
PH
1959 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1960 so has no need of it. */
1961
1962 case 'B':
1963 if (*argrest == 0) i++; /* Skip over the type */
1964 break;
1965
1966
1967 case 'b':
1968 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1969
1970 /* -bd: Run in daemon mode, awaiting SMTP connections.
1971 -bdf: Ditto, but in the foreground.
1972 */
1973
1974 if (*argrest == 'd')
1975 {
1976 daemon_listen = TRUE;
1977 if (*(++argrest) == 'f') background_daemon = FALSE;
1978 else if (*argrest != 0) { badarg = TRUE; break; }
1979 }
1980
328895cc
PH
1981 /* -be: Run in expansion test mode
1982 -bem: Ditto, but read a message from a file first
1983 */
059ec3d9
PH
1984
1985 else if (*argrest == 'e')
328895cc 1986 {
059ec3d9 1987 expansion_test = checking = TRUE;
328895cc
PH
1988 if (argrest[1] == 'm')
1989 {
1990 if (++i >= argc) { badarg = TRUE; break; }
1991 expansion_test_message = argv[i];
1992 argrest++;
1993 }
1994 if (argrest[1] != 0) { badarg = TRUE; break; }
1995 }
059ec3d9 1996
f05da2e8
PH
1997 /* -bF: Run system filter test */
1998
1999 else if (*argrest == 'F')
2000 {
2001 filter_test |= FTEST_SYSTEM;
2002 if (*(++argrest) != 0) { badarg = TRUE; break; }
2003 if (++i < argc) filter_test_sfile = argv[i]; else
2004 {
2005 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2006 exit(EXIT_FAILURE);
2007 }
2008 }
2009
2010 /* -bf: Run user filter test
059ec3d9
PH
2011 -bfd: Set domain for filter testing
2012 -bfl: Set local part for filter testing
2013 -bfp: Set prefix for filter testing
2014 -bfs: Set suffix for filter testing
2015 */
2016
f05da2e8 2017 else if (*argrest == 'f')
059ec3d9 2018 {
f05da2e8 2019 if (*(++argrest) == 0)
059ec3d9 2020 {
f05da2e8
PH
2021 filter_test |= FTEST_USER;
2022 if (++i < argc) filter_test_ufile = argv[i]; else
059ec3d9
PH
2023 {
2024 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2025 exit(EXIT_FAILURE);
2026 }
2027 }
2028 else
2029 {
2030 if (++i >= argc)
2031 {
2032 fprintf(stderr, "exim: string expected after %s\n", arg);
2033 exit(EXIT_FAILURE);
2034 }
2035 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2036 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2037 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2038 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2039 else { badarg = TRUE; break; }
2040 }
2041 }
2042
2043 /* -bh: Host checking - an IP address must follow. */
2044
2045 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2046 {
2047 if (++i >= argc) { badarg = TRUE; break; }
2048 sender_host_address = argv[i];
2049 host_checking = checking = log_testing_mode = TRUE;
2050 host_checking_callout = argrest[1] == 'c';
2051 }
2052
2053 /* -bi: This option is used by sendmail to initialize *the* alias file,
2054 though it has the -oA option to specify a different file. Exim has no
2055 concept of *the* alias file, but since Sun's YP make script calls
2056 sendmail this way, some support must be provided. */
2057
2058 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2059
98a90c36
PP
2060 /* -bI: provide information, of the type to follow after a colon.
2061 This is an Exim flag. */
2062
2063 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2064 {
2065 uschar *p = &argrest[2];
2066 info_flag = CMDINFO_HELP;
2067 if (Ustrlen(p))
2068 {
2069 if (strcmpic(p, CUS"sieve") == 0)
2070 {
2071 info_flag = CMDINFO_SIEVE;
2072 info_stdout = TRUE;
2073 }
36a3ae5f
PP
2074 else if (strcmpic(p, CUS"dscp") == 0)
2075 {
2076 info_flag = CMDINFO_DSCP;
2077 info_stdout = TRUE;
2078 }
98a90c36
PP
2079 else if (strcmpic(p, CUS"help") == 0)
2080 {
2081 info_stdout = TRUE;
2082 }
2083 }
2084 }
2085
059ec3d9
PH
2086 /* -bm: Accept and deliver message - the default option. Reinstate
2087 receiving_message, which got turned off for all -b options. */
2088
2089 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2090
8544e77a
PP
2091 /* -bmalware: test the filename given for malware */
2092
2093 else if (Ustrcmp(argrest, "malware") == 0)
2094 {
2095 if (++i >= argc) { badarg = TRUE; break; }
2096 malware_test_file = argv[i];
2097 }
2098
059ec3d9
PH
2099 /* -bnq: For locally originating messages, do not qualify unqualified
2100 addresses. In the envelope, this causes errors; in header lines they
2101 just get left. */
2102
2103 else if (Ustrcmp(argrest, "nq") == 0)
2104 {
2105 allow_unqualified_sender = FALSE;
2106 allow_unqualified_recipient = FALSE;
2107 }
2108
2109 /* -bpxx: List the contents of the mail queue, in various forms. If
2110 the option is -bpc, just a queue count is needed. Otherwise, if the
2111 first letter after p is r, then order is random. */
2112
2113 else if (*argrest == 'p')
2114 {
2115 if (*(++argrest) == 'c')
2116 {
2117 count_queue = TRUE;
2118 if (*(++argrest) != 0) badarg = TRUE;
2119 break;
2120 }
2121
2122 if (*argrest == 'r')
2123 {
2124 list_queue_option = 8;
2125 argrest++;
2126 }
2127 else list_queue_option = 0;
2128
2129 list_queue = TRUE;
2130
2131 /* -bp: List the contents of the mail queue, top-level only */
2132
2133 if (*argrest == 0) {}
2134
2135 /* -bpu: List the contents of the mail queue, top-level undelivered */
2136
2137 else if (Ustrcmp(argrest, "u") == 0) list_queue_option += 1;
2138
2139 /* -bpa: List the contents of the mail queue, including all delivered */
2140
2141 else if (Ustrcmp(argrest, "a") == 0) list_queue_option += 2;
2142
2143 /* Unknown after -bp[r] */
2144
2145 else
2146 {
2147 badarg = TRUE;
2148 break;
2149 }
2150 }
2151
2152
2153 /* -bP: List the configuration variables given as the address list.
2154 Force -v, so configuration errors get displayed. */
2155
2156 else if (Ustrcmp(argrest, "P") == 0)
2157 {
2158 list_options = TRUE;
2159 debug_selector |= D_v;
2160 debug_file = stderr;
2161 }
2162
2163 /* -brt: Test retry configuration lookup */
2164
2165 else if (Ustrcmp(argrest, "rt") == 0)
2166 {
2167 test_retry_arg = i + 1;
2168 goto END_ARG;
2169 }
2170
2171 /* -brw: Test rewrite configuration */
2172
2173 else if (Ustrcmp(argrest, "rw") == 0)
2174 {
2175 test_rewrite_arg = i + 1;
2176 goto END_ARG;
2177 }
2178
2179 /* -bS: Read SMTP commands on standard input, but produce no replies -
2180 all errors are reported by sending messages. */
2181
2182 else if (Ustrcmp(argrest, "S") == 0)
2183 smtp_input = smtp_batched_input = receiving_message = TRUE;
2184
2185 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2186 on standard output. */
2187
2188 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2189
2190 /* -bt: address testing mode */
2191
2192 else if (Ustrcmp(argrest, "t") == 0)
2193 address_test_mode = checking = log_testing_mode = TRUE;
2194
2195 /* -bv: verify addresses */
2196
2197 else if (Ustrcmp(argrest, "v") == 0)
2198 verify_address_mode = checking = log_testing_mode = TRUE;
2199
2200 /* -bvs: verify sender addresses */
2201
2202 else if (Ustrcmp(argrest, "vs") == 0)
2203 {
2204 verify_address_mode = checking = log_testing_mode = TRUE;
2205 verify_as_sender = TRUE;
2206 }
2207
2208 /* -bV: Print version string and support details */
2209
2210 else if (Ustrcmp(argrest, "V") == 0)
2211 {
2212 printf("Exim version %s #%s built %s\n", version_string,
2213 version_cnumber, version_date);
2214 printf("%s\n", CS version_copyright);
2215 version_printed = TRUE;
2216 show_whats_supported(stdout);
2217 }
2218
9ee44efb
PP
2219 /* -bw: inetd wait mode, accept a listening socket as stdin */
2220
2221 else if (*argrest == 'w')
2222 {
2223 inetd_wait_mode = TRUE;
2224 background_daemon = FALSE;
2225 daemon_listen = TRUE;
2226 if (*(++argrest) != '\0')
2227 {
2228 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2229 if (inetd_wait_timeout <= 0)
2230 {
2231 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2232 exit(EXIT_FAILURE);
2233 }
2234 }
2235 }
2236
059ec3d9
PH
2237 else badarg = TRUE;
2238 break;
2239
2240
2241 /* -C: change configuration file list; ignore if it isn't really
2242 a change! Enforce a prefix check if required. */
2243
2244 case 'C':
2245 if (*argrest == 0)
2246 {
2247 if(++i < argc) argrest = argv[i]; else
2248 { badarg = TRUE; break; }
2249 }
2250 if (Ustrcmp(config_main_filelist, argrest) != 0)
2251 {
2252 #ifdef ALT_CONFIG_PREFIX
2253 int sep = 0;
2254 int len = Ustrlen(ALT_CONFIG_PREFIX);
2255 uschar *list = argrest;
2256 uschar *filename;
2257 while((filename = string_nextinlist(&list, &sep, big_buffer,
2258 big_buffer_size)) != NULL)
2259 {
2260 if ((Ustrlen(filename) < len ||
2261 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2262 Ustrstr(filename, "/../") != NULL) &&
2263 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2264 {
2265 fprintf(stderr, "-C Permission denied\n");
2266 exit(EXIT_FAILURE);
2267 }
2268 }
2269 #endif
261dc43e
DW
2270 if (real_uid != root_uid)
2271 {
90b6341f 2272 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2273
90b6341f
DW
2274 if (real_uid != exim_uid
2275 #ifdef CONFIGURE_OWNER
2276 && real_uid != config_uid
2277 #endif
2278 )
261dc43e
DW
2279 trusted_config = FALSE;
2280 else
2281 {
90b6341f 2282 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2283 if (trust_list)
2284 {
2285 struct stat statbuf;
2286
2287 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2288 (statbuf.st_uid != root_uid /* owner not root */
2289 #ifdef CONFIGURE_OWNER
2290 && statbuf.st_uid != config_uid /* owner not the special one */
2291 #endif
2292 ) || /* or */
2293 (statbuf.st_gid != root_gid /* group not root */
2294 #ifdef CONFIGURE_GROUP
2295 && statbuf.st_gid != config_gid /* group not the special one */
2296 #endif
2297 && (statbuf.st_mode & 020) != 0 /* group writeable */
2298 ) || /* or */
2299 (statbuf.st_mode & 2) != 0) /* world writeable */
2300 {
2301 trusted_config = FALSE;
2302 fclose(trust_list);
2303 }
2304 else
2305 {
2306 /* Well, the trust list at least is up to scratch... */
2307 void *reset_point = store_get(0);
90b6341f
DW
2308 uschar *trusted_configs[32];
2309 int nr_configs = 0;
261dc43e
DW
2310 int i = 0;
2311
2312 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2313 {
2314 uschar *start = big_buffer, *nl;
2315 while (*start && isspace(*start))
2316 start++;
1e83d68b 2317 if (*start != '/')
261dc43e
DW
2318 continue;
2319 nl = Ustrchr(start, '\n');
2320 if (nl)
2321 *nl = 0;
90b6341f
DW
2322 trusted_configs[nr_configs++] = string_copy(start);
2323 if (nr_configs == 32)
261dc43e
DW
2324 break;
2325 }
2326 fclose(trust_list);
2327
90b6341f 2328 if (nr_configs)
261dc43e
DW
2329 {
2330 int sep = 0;
55414b25 2331 const uschar *list = argrest;
261dc43e
DW
2332 uschar *filename;
2333 while (trusted_config && (filename = string_nextinlist(&list,
2334 &sep, big_buffer, big_buffer_size)) != NULL)
2335 {
90b6341f 2336 for (i=0; i < nr_configs; i++)
261dc43e 2337 {
90b6341f 2338 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e
DW
2339 break;
2340 }
90b6341f 2341 if (i == nr_configs)
261dc43e
DW
2342 {
2343 trusted_config = FALSE;
2344 break;
2345 }
2346 }
1e83d68b 2347 store_reset(reset_point);
261dc43e
DW
2348 }
2349 else
2350 {
2351 /* No valid prefixes found in trust_list file. */
2352 trusted_config = FALSE;
2353 }
2354 }
2355 }
2356 else
2357 {
2358 /* Could not open trust_list file. */
2359 trusted_config = FALSE;
2360 }
2361 }
2362 #else
2363 /* Not root; don't trust config */
2364 trusted_config = FALSE;
2365 #endif
2366 }
059ec3d9
PH
2367
2368 config_main_filelist = argrest;
2369 config_changed = TRUE;
2370 }
2371 break;
2372
2373
2374 /* -D: set up a macro definition */
2375
2376 case 'D':
2377 #ifdef DISABLE_D_OPTION
2378 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2379 exit(EXIT_FAILURE);
2380 #else
2381 {
2382 int ptr = 0;
2383 macro_item *mlast = NULL;
2384 macro_item *m;
2385 uschar name[24];
2386 uschar *s = argrest;
2387
2388 while (isspace(*s)) s++;
2389
2390 if (*s < 'A' || *s > 'Z')
2391 {
2392 fprintf(stderr, "exim: macro name set by -D must start with "
2393 "an upper case letter\n");
2394 exit(EXIT_FAILURE);
2395 }
2396
2397 while (isalnum(*s) || *s == '_')
2398 {
2399 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2400 s++;
2401 }
2402 name[ptr] = 0;
2403 if (ptr == 0) { badarg = TRUE; break; }
2404 while (isspace(*s)) s++;
2405 if (*s != 0)
2406 {
2407 if (*s++ != '=') { badarg = TRUE; break; }
2408 while (isspace(*s)) s++;
2409 }
2410
2411 for (m = macros; m != NULL; m = m->next)
2412 {
2413 if (Ustrcmp(m->name, name) == 0)
2414 {
2415 fprintf(stderr, "exim: duplicated -D in command line\n");
2416 exit(EXIT_FAILURE);
2417 }
2418 mlast = m;
2419 }
2420
2421 m = store_get(sizeof(macro_item) + Ustrlen(name));
2422 m->next = NULL;
2423 m->command_line = TRUE;
2424 if (mlast == NULL) macros = m; else mlast->next = m;
2425 Ustrcpy(m->name, name);
2426 m->replacement = string_copy(s);
2427
2428 if (clmacro_count >= MAX_CLMACROS)
2429 {
2430 fprintf(stderr, "exim: too many -D options on command line\n");
2431 exit(EXIT_FAILURE);
2432 }
2433 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2434 m->replacement);
2435 }
2436 #endif
2437 break;
2438
2439 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2440 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2441 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2442
2443 case 'd':
2444 if (Ustrcmp(argrest, "ropcr") == 0)
2445 {
2446 /* drop_cr = TRUE; */
2447 }
2448
2449 /* Use an intermediate variable so that we don't set debugging while
2450 decoding the debugging bits. */
2451
2452 else
2453 {
2454 unsigned int selector = D_default;
2455 debug_selector = 0;
2456 debug_file = NULL;
3d235903
PH
2457 if (*argrest == 'd')
2458 {
2459 debug_daemon = TRUE;
2460 argrest++;
2461 }
059ec3d9 2462 if (*argrest != 0)
6c6d6e48
TF
2463 decode_bits(&selector, 1, debug_notall, argrest,
2464 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2465 debug_selector = selector;
2466 }
2467 break;
2468
2469
2470 /* -E: This is a local error message. This option is not intended for
2471 external use at all, but is not restricted to trusted callers because it
2472 does no harm (just suppresses certain error messages) and if Exim is run
2473 not setuid root it won't always be trusted when it generates error
2474 messages using this option. If there is a message id following -E, point
2475 message_reference at it, for logging. */
2476
2477 case 'E':
2478 local_error_message = TRUE;
2479 if (mac_ismsgid(argrest)) message_reference = argrest;
2480 break;
2481
2482
2483 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2484 option, so it looks as if historically the -oex options are also callable
2485 without the leading -o. So we have to accept them. Before the switch,
2486 anything starting -oe has been converted to -e. Exim does not support all
2487 of the sendmail error options. */
2488
2489 case 'e':
2490 if (Ustrcmp(argrest, "e") == 0)
2491 {
2492 arg_error_handling = ERRORS_SENDER;
2493 errors_sender_rc = EXIT_SUCCESS;
2494 }
2495 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2496 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2497 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2498 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2499 else badarg = TRUE;
2500 break;
2501
2502
2503 /* -F: Set sender's full name, used instead of the gecos entry from
2504 the password file. Since users can usually alter their gecos entries,
2505 there's no security involved in using this instead. The data can follow
2506 the -F or be in the next argument. */
2507
2508 case 'F':
2509 if (*argrest == 0)
2510 {
2511 if(++i < argc) argrest = argv[i]; else
2512 { badarg = TRUE; break; }
2513 }
2514 originator_name = argrest;
2fe1a124 2515 sender_name_forced = TRUE;
059ec3d9
PH
2516 break;
2517
2518
2519 /* -f: Set sender's address - this value is only actually used if Exim is
2520 run by a trusted user, or if untrusted_set_sender is set and matches the
2521 address, except that the null address can always be set by any user. The
2522 test for this happens later, when the value given here is ignored when not
2523 permitted. For an untrusted user, the actual sender is still put in Sender:
2524 if it doesn't match the From: header (unless no_local_from_check is set).
2525 The data can follow the -f or be in the next argument. The -r switch is an
2526 obsolete form of -f but since there appear to be programs out there that
2527 use anything that sendmail has ever supported, better accept it - the
2528 synonymizing is done before the switch above.
2529
2530 At this stage, we must allow domain literal addresses, because we don't
2531 know what the setting of allow_domain_literals is yet. Ditto for trailing
2532 dots and strip_trailing_dot. */
2533
2534 case 'f':
2535 {
250b6871 2536 int dummy_start, dummy_end;
059ec3d9
PH
2537 uschar *errmess;
2538 if (*argrest == 0)
2539 {
2540 if (i+1 < argc) argrest = argv[++i]; else
2541 { badarg = TRUE; break; }
2542 }
2543 if (*argrest == 0)
059ec3d9 2544 sender_address = string_sprintf(""); /* Ensure writeable memory */
059ec3d9
PH
2545 else
2546 {
2547 uschar *temp = argrest + Ustrlen(argrest) - 1;
2548 while (temp >= argrest && isspace(*temp)) temp--;
2549 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2550 allow_domain_literals = TRUE;
2551 strip_trailing_dot = TRUE;
250b6871
JH
2552#ifdef EXPERIMENTAL_INTERNATIONAL
2553 allow_utf8_domains = TRUE;
2554#endif
2555 sender_address = parse_extract_address(argrest, &errmess,
2556 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
2557#ifdef EXPERIMENTAL_INTERNATIONAL
2558 message_smtputf8 = string_is_utf8(sender_address);
2559 allow_utf8_domains = FALSE;
2560#endif
059ec3d9
PH
2561 allow_domain_literals = FALSE;
2562 strip_trailing_dot = FALSE;
2563 if (sender_address == NULL)
2564 {
2565 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2566 return EXIT_FAILURE;
2567 }
2568 }
2569 sender_address_forced = TRUE;
2570 }
2571 break;
2572
a3fb9793 2573 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2574 sendmail may complain about problems instead of fixing them.
2575 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2576 not at this time complain about problems. */
059ec3d9
PH
2577
2578 case 'G':
f4ee74ac 2579 flag_G = TRUE;
059ec3d9
PH
2580 break;
2581
2582 /* -h: Set the hop count for an incoming message. Exim does not currently
2583 support this; it always computes it by counting the Received: headers.
2584 To put it in will require a change to the spool header file format. */
2585
2586 case 'h':
2587 if (*argrest == 0)
2588 {
2589 if(++i < argc) argrest = argv[i]; else
2590 { badarg = TRUE; break; }
2591 }
2592 if (!isdigit(*argrest)) badarg = TRUE;
2593 break;
2594
2595
2596 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2597 not to be documented for sendmail but mailx (at least) uses it) */
2598
2599 case 'i':
2600 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2601 break;
2602
2603
a3fb9793
PP
2604 /* -L: set the identifier used for syslog; equivalent to setting
2605 syslog_processname in the config file, but needs to be an admin option. */
2606
2607 case 'L':
2608 if (*argrest == '\0')
2609 {
2610 if(++i < argc) argrest = argv[i]; else
2611 { badarg = TRUE; break; }
2612 }
2613 sz = Ustrlen(argrest);
2614 if (sz > 32)
2615 {
2616 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2617 return EXIT_FAILURE;
2618 }
2619 if (sz < 1)
2620 {
2621 fprintf(stderr, "exim: the -L syslog name is too short\n");
2622 return EXIT_FAILURE;
2623 }
2624 cmdline_syslog_name = argrest;
2625 break;
2626
059ec3d9
PH
2627 case 'M':
2628 receiving_message = FALSE;
2629
2630 /* -MC: continue delivery of another message via an existing open
2631 file descriptor. This option is used for an internal call by the
2632 smtp transport when there is a pending message waiting to go to an
2633 address to which it has got a connection. Five subsequent arguments are
2634 required: transport name, host name, IP address, sequence number, and
2635 message_id. Transports may decline to create new processes if the sequence
2636 number gets too big. The channel is stdin. This (-MC) must be the last
2637 argument. There's a subsequent check that the real-uid is privileged.
2638
2639 If we are running in the test harness. delay for a bit, to let the process
2640 that set this one up complete. This makes for repeatability of the logging,
2641 etc. output. */
2642
2643 if (Ustrcmp(argrest, "C") == 0)
2644 {
41c7c167
PH
2645 union sockaddr_46 interface_sock;
2646 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2647
059ec3d9
PH
2648 if (argc != i + 6)
2649 {
2650 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2651 return EXIT_FAILURE;
2652 }
2653
2654 if (msg_action_arg >= 0)
2655 {
2656 fprintf(stderr, "exim: incompatible arguments\n");
2657 return EXIT_FAILURE;
2658 }
2659
2660 continue_transport = argv[++i];
2661 continue_hostname = argv[++i];
2662 continue_host_address = argv[++i];
2663 continue_sequence = Uatoi(argv[++i]);
2664 msg_action = MSG_DELIVER;
2665 msg_action_arg = ++i;
2666 forced_delivery = TRUE;
2667 queue_run_pid = passed_qr_pid;
2668 queue_run_pipe = passed_qr_pipe;
2669
2670 if (!mac_ismsgid(argv[i]))
2671 {
2672 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2673 argv[i]);
2674 return EXIT_FAILURE;
2675 }
2676
41c7c167
PH
2677 /* Set up $sending_ip_address and $sending_port */
2678
2679 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2680 &size) == 0)
2681 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2682 &sending_port);
2683 else
2684 {
2685 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2686 strerror(errno));
2687 return EXIT_FAILURE;
2688 }
2689
059ec3d9
PH
2690 if (running_in_test_harness) millisleep(500);
2691 break;
2692 }
2693
2694 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2695 precedes -MC (see above). The flag indicates that the host to which
2696 Exim is connected has accepted an AUTH sequence. */
2697
2698 else if (Ustrcmp(argrest, "CA") == 0)
2699 {
2700 smtp_authenticated = TRUE;
2701 break;
2702 }
2703
6c1c3d1d
WB
2704 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2705 that exim is connected to supports the esmtp extension DSN */
45500060 2706 else if (Ustrcmp(argrest, "CD") == 0)
6c1c3d1d
WB
2707 {
2708 smtp_use_dsn = TRUE;
2709 break;
2710 }
6c1c3d1d 2711
059ec3d9
PH
2712 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2713 it preceded -MC (see above) */
2714
2715 else if (Ustrcmp(argrest, "CP") == 0)
2716 {
2717 smtp_use_pipelining = TRUE;
2718 break;
2719 }
2720
2721 /* -MCQ: pass on the pid of the queue-running process that started
2722 this chain of deliveries and the fd of its synchronizing pipe; this
2723 is useful only when it precedes -MC (see above) */
2724
2725 else if (Ustrcmp(argrest, "CQ") == 0)
2726 {
2727 if(++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
2728 else badarg = TRUE;
2729 if(++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
2730 else badarg = TRUE;
2731 break;
2732 }
2733
2734 /* -MCS: set the smtp_use_size flag; this is useful only when it
2735 precedes -MC (see above) */
2736
2737 else if (Ustrcmp(argrest, "CS") == 0)
2738 {
2739 smtp_use_size = TRUE;
2740 break;
2741 }
2742
2743 /* -MCT: set the tls_offered flag; this is useful only when it
2744 precedes -MC (see above). The flag indicates that the host to which
2745 Exim is connected has offered TLS support. */
2746
2747 #ifdef SUPPORT_TLS
2748 else if (Ustrcmp(argrest, "CT") == 0)
2749 {
2750 tls_offered = TRUE;
2751 break;
2752 }
2753 #endif
2754
2755 /* -M[x]: various operations on the following list of message ids:
2756 -M deliver the messages, ignoring next retry times and thawing
2757 -Mc deliver the messages, checking next retry times, no thawing
2758 -Mf freeze the messages
2759 -Mg give up on the messages
2760 -Mt thaw the messages
2761 -Mrm remove the messages
2762 In the above cases, this must be the last option. There are also the
2763 following options which are followed by a single message id, and which
2764 act on that message. Some of them use the "recipient" addresses as well.
2765 -Mar add recipient(s)
2766 -Mmad mark all recipients delivered
2767 -Mmd mark recipients(s) delivered
2768 -Mes edit sender
0ef732d9 2769 -Mset load a message for use with -be
059ec3d9 2770 -Mvb show body
a96603a0 2771 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2772 -Mvh show header
2773 -Mvl show log
2774 */
2775
2776 else if (*argrest == 0)
2777 {
2778 msg_action = MSG_DELIVER;
2779 forced_delivery = deliver_force_thaw = TRUE;
2780 }
2781 else if (Ustrcmp(argrest, "ar") == 0)
2782 {
2783 msg_action = MSG_ADD_RECIPIENT;
2784 one_msg_action = TRUE;
2785 }
2786 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2787 else if (Ustrcmp(argrest, "es") == 0)
2788 {
2789 msg_action = MSG_EDIT_SENDER;
2790 one_msg_action = TRUE;
2791 }
2792 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2793 else if (Ustrcmp(argrest, "g") == 0)
2794 {
2795 msg_action = MSG_DELIVER;
2796 deliver_give_up = TRUE;
2797 }
2798 else if (Ustrcmp(argrest, "mad") == 0)
2799 {
2800 msg_action = MSG_MARK_ALL_DELIVERED;
2801 }
2802 else if (Ustrcmp(argrest, "md") == 0)
2803 {
2804 msg_action = MSG_MARK_DELIVERED;
2805 one_msg_action = TRUE;
2806 }
2807 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2808 else if (Ustrcmp(argrest, "set") == 0)
2809 {
2810 msg_action = MSG_LOAD;
2811 one_msg_action = TRUE;
2812 }
059ec3d9
PH
2813 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2814 else if (Ustrcmp(argrest, "vb") == 0)
2815 {
2816 msg_action = MSG_SHOW_BODY;
2817 one_msg_action = TRUE;
2818 }
a96603a0
PH
2819 else if (Ustrcmp(argrest, "vc") == 0)
2820 {
2821 msg_action = MSG_SHOW_COPY;
2822 one_msg_action = TRUE;
2823 }
059ec3d9
PH
2824 else if (Ustrcmp(argrest, "vh") == 0)
2825 {
2826 msg_action = MSG_SHOW_HEADER;
2827 one_msg_action = TRUE;
2828 }
2829 else if (Ustrcmp(argrest, "vl") == 0)
2830 {
2831 msg_action = MSG_SHOW_LOG;
2832 one_msg_action = TRUE;
2833 }
2834 else { badarg = TRUE; break; }
2835
2836 /* All the -Mxx options require at least one message id. */
2837
2838 msg_action_arg = i + 1;
2839 if (msg_action_arg >= argc)
2840 {
2841 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2842 return EXIT_FAILURE;
2843 }
2844
2845 /* Some require only message ids to follow */
2846
2847 if (!one_msg_action)
2848 {
2849 int j;
2850 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2851 {
2852 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2853 argv[j], arg);
2854 return EXIT_FAILURE;
2855 }
2856 goto END_ARG; /* Remaining args are ids */
2857 }
2858
2859 /* Others require only one message id, possibly followed by addresses,
2860 which will be handled as normal arguments. */
2861
2862 else
2863 {
2864 if (!mac_ismsgid(argv[msg_action_arg]))
2865 {
2866 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2867 argv[msg_action_arg], arg);
2868 return EXIT_FAILURE;
2869 }
2870 i++;
2871 }
2872 break;
2873
2874
2875 /* Some programs seem to call the -om option without the leading o;
2876 for sendmail it askes for "me too". Exim always does this. */
2877
2878 case 'm':
2879 if (*argrest != 0) badarg = TRUE;
2880 break;
2881
2882
2883 /* -N: don't do delivery - a debugging option that stops transports doing
2884 their thing. It implies debugging at the D_v level. */
2885
2886 case 'N':
2887 if (*argrest == 0)
2888 {
2889 dont_deliver = TRUE;
2890 debug_selector |= D_v;
2891 debug_file = stderr;
2892 }
2893 else badarg = TRUE;
2894 break;
2895
2896
12f69989
PP
2897 /* -n: This means "don't alias" in sendmail, apparently.
2898 For normal invocations, it has no effect.
2899 It may affect some other options. */
059ec3d9
PH
2900
2901 case 'n':
12f69989 2902 flag_n = TRUE;
059ec3d9
PH
2903 break;
2904
2905 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2906 option to the specified value. This form uses long names. We need to handle
2907 -O option=value and -Ooption=value. */
2908
2909 case 'O':
2910 if (*argrest == 0)
2911 {
2912 if (++i >= argc)
2913 {
2914 fprintf(stderr, "exim: string expected after -O\n");
2915 exit(EXIT_FAILURE);
2916 }
2917 }
2918 break;
2919
2920 case 'o':
2921
2922 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2923 file" option). */
2924
2925 if (*argrest == 'A')
2926 {
2927 alias_arg = argrest + 1;
2928 if (alias_arg[0] == 0)
2929 {
2930 if (i+1 < argc) alias_arg = argv[++i]; else
2931 {
2932 fprintf(stderr, "exim: string expected after -oA\n");
2933 exit(EXIT_FAILURE);
2934 }
2935 }
2936 }
2937
2938 /* -oB: Set a connection message max value for remote deliveries */
2939
2940 else if (*argrest == 'B')
2941 {
2942 uschar *p = argrest + 1;
2943 if (p[0] == 0)
2944 {
2945 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2946 {
2947 connection_max_messages = 1;
2948 p = NULL;
2949 }
2950 }
2951
2952 if (p != NULL)
2953 {
2954 if (!isdigit(*p))
2955 {
2956 fprintf(stderr, "exim: number expected after -oB\n");
2957 exit(EXIT_FAILURE);
2958 }
2959 connection_max_messages = Uatoi(p);
2960 }
2961 }
2962
2963 /* -odb: background delivery */
2964
2965 else if (Ustrcmp(argrest, "db") == 0)
2966 {
2967 synchronous_delivery = FALSE;
2968 arg_queue_only = FALSE;
2969 queue_only_set = TRUE;
2970 }
2971
2972 /* -odf: foreground delivery (smail-compatible option); same effect as
2973 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2974 */
2975
2976 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
2977 {
2978 synchronous_delivery = TRUE;
2979 arg_queue_only = FALSE;
2980 queue_only_set = TRUE;
2981 }
2982
2983 /* -odq: queue only */
2984
2985 else if (Ustrcmp(argrest, "dq") == 0)
2986 {
2987 synchronous_delivery = FALSE;
2988 arg_queue_only = TRUE;
2989 queue_only_set = TRUE;
2990 }
2991
2992 /* -odqs: queue SMTP only - do local deliveries and remote routing,
2993 but no remote delivery */
2994
2995 else if (Ustrcmp(argrest, "dqs") == 0)
2996 {
2997 queue_smtp = TRUE;
2998 arg_queue_only = FALSE;
2999 queue_only_set = TRUE;
3000 }
3001
3002 /* -oex: Sendmail error flags. As these are also accepted without the
3003 leading -o prefix, for compatibility with vacation and other callers,
3004 they are handled with -e above. */
3005
3006 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3007 -oitrue: Another sendmail syntax for the same */
3008
3009 else if (Ustrcmp(argrest, "i") == 0 ||
3010 Ustrcmp(argrest, "itrue") == 0)
3011 dot_ends = FALSE;
3012
3013 /* -oM*: Set various characteristics for an incoming message; actually
3014 acted on for trusted callers only. */
3015
3016 else if (*argrest == 'M')
3017 {
3018 if (i+1 >= argc)
3019 {
3020 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3021 exit(EXIT_FAILURE);
3022 }
3023
3024 /* -oMa: Set sender host address */
3025
3026 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3027
3028 /* -oMaa: Set authenticator name */
3029
3030 else if (Ustrcmp(argrest, "Maa") == 0)
3031 sender_host_authenticated = argv[++i];
3032
3033 /* -oMas: setting authenticated sender */
3034
3035 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3036
3037 /* -oMai: setting authenticated id */
3038
3039 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3040
3041 /* -oMi: Set incoming interface address */
3042
3043 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3044
d2af03f4
HS
3045 /* -oMm: Message reference */
3046
3047 else if (Ustrcmp(argrest, "Mm") == 0)
3048 {
3049 if (!mac_ismsgid(argv[i+1]))
3050 {
3051 fprintf(stderr,"-oMm must be a valid message ID\n");
3052 exit(EXIT_FAILURE);
3053 }
3054 if (!trusted_config)
3055 {
3056 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3057 exit(EXIT_FAILURE);
3058 }
3059 message_reference = argv[++i];
3060 }
3061
059ec3d9
PH
3062 /* -oMr: Received protocol */
3063
3064 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3065
3066 /* -oMs: Set sender host name */
3067
3068 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3069
3070 /* -oMt: Set sender ident */
3071
33d73e3b
PH
3072 else if (Ustrcmp(argrest, "Mt") == 0)
3073 {
3074 sender_ident_set = TRUE;
3075 sender_ident = argv[++i];
3076 }
059ec3d9
PH
3077
3078 /* Else a bad argument */
3079
3080 else
3081 {
3082 badarg = TRUE;
3083 break;
3084 }
3085 }
3086
3087 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3088 seem to call this as -m (undocumented), so that is also accepted (see
3089 above). */
3090
3091 else if (Ustrcmp(argrest, "m") == 0) {}
3092
3093 /* -oo: An ancient flag for old-style addresses which still seems to
3094 crop up in some calls (see in SCO). */
3095
3096 else if (Ustrcmp(argrest, "o") == 0) {}
3097
3098 /* -oP <name>: set pid file path for daemon */
3099
3100 else if (Ustrcmp(argrest, "P") == 0)
3101 override_pid_file_path = argv[++i];
3102
3103 /* -or <n>: set timeout for non-SMTP acceptance
3104 -os <n>: set timeout for SMTP acceptance */
3105
3106 else if (*argrest == 'r' || *argrest == 's')
3107 {
3108 int *tp = (*argrest == 'r')?
3109 &arg_receive_timeout : &arg_smtp_receive_timeout;
3110 if (argrest[1] == 0)
3111 {
3112 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3113 }
3114 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3115 if (*tp < 0)
3116 {
3117 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3118 exit(EXIT_FAILURE);
3119 }
3120 }
3121
3122 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3123
3124 else if (Ustrcmp(argrest, "X") == 0)
3125 override_local_interfaces = argv[++i];
3126
3127 /* Unknown -o argument */
3128
3129 else badarg = TRUE;
3130 break;
3131
3132
3133 /* -ps: force Perl startup; -pd force delayed Perl startup */
3134
3135 case 'p':
3136 #ifdef EXIM_PERL
3137 if (*argrest == 's' && argrest[1] == 0)
3138 {
3139 perl_start_option = 1;
3140 break;
3141 }
3142 if (*argrest == 'd' && argrest[1] == 0)
3143 {
3144 perl_start_option = -1;
3145 break;
3146 }
3147 #endif
3148
3149 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3150 which sets the host protocol and host name */
3151
3152 if (*argrest == 0)
3153 {
3154 if (i+1 < argc) argrest = argv[++i]; else
3155 { badarg = TRUE; break; }
3156 }
3157
3158 if (*argrest != 0)
3159 {
3160 uschar *hn = Ustrchr(argrest, ':');
3161 if (hn == NULL)
3162 {
3163 received_protocol = argrest;
3164 }
3165 else
3166 {
3167 received_protocol = string_copyn(argrest, hn - argrest);
3168 sender_host_name = hn + 1;
3169 }
3170 }
3171 break;
3172
3173
3174 case 'q':
3175 receiving_message = FALSE;
3cc66b45
PH
3176 if (queue_interval >= 0)
3177 {
3178 fprintf(stderr, "exim: -q specified more than once\n");
3179 exit(EXIT_FAILURE);
3180 }
059ec3d9
PH
3181
3182 /* -qq...: Do queue runs in a 2-stage manner */
3183
3184 if (*argrest == 'q')
3185 {
3186 queue_2stage = TRUE;
3187 argrest++;
3188 }
3189
3190 /* -qi...: Do only first (initial) deliveries */
3191
3192 if (*argrest == 'i')
3193 {
3194 queue_run_first_delivery = TRUE;
3195 argrest++;
3196 }
3197
3198 /* -qf...: Run the queue, forcing deliveries
3199 -qff..: Ditto, forcing thawing as well */
3200
3201 if (*argrest == 'f')
3202 {
3203 queue_run_force = TRUE;
3204 if (*(++argrest) == 'f')
3205 {
3206 deliver_force_thaw = TRUE;
3207 argrest++;
3208 }
3209 }
3210
3211 /* -q[f][f]l...: Run the queue only on local deliveries */
3212
3213 if (*argrest == 'l')
3214 {
3215 queue_run_local = TRUE;
3216 argrest++;
3217 }
3218
3219 /* -q[f][f][l]: Run the queue, optionally forced, optionally local only,
3220 optionally starting from a given message id. */
3221
3222 if (*argrest == 0 &&
3223 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3224 {
3225 queue_interval = 0;
3226 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3227 start_queue_run_id = argv[++i];
3228 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3229 stop_queue_run_id = argv[++i];
3230 }
3231
3232 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3233 optionally local only. */
3234
3235 else
3236 {
3237 if (*argrest != 0)
3238 queue_interval = readconf_readtime(argrest, 0, FALSE);
3239 else
3240 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3241 if (queue_interval <= 0)
3242 {
3243 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3244 exit(EXIT_FAILURE);
3245 }
3246 }
3247 break;
3248
3249
3250 case 'R': /* Synonymous with -qR... */
3251 receiving_message = FALSE;
3252
3253 /* -Rf: As -R (below) but force all deliveries,
3254 -Rff: Ditto, but also thaw all frozen messages,
3255 -Rr: String is regex
3256 -Rrf: Regex and force
3257 -Rrff: Regex and force and thaw
3258
3259 in all cases provided there are no further characters in this
3260 argument. */
3261
3262 if (*argrest != 0)
3263 {
3264 int i;
3265 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3266 {
3267 if (Ustrcmp(argrest, rsopts[i]) == 0)
3268 {
3269 if (i != 2) queue_run_force = TRUE;
3270 if (i >= 2) deliver_selectstring_regex = TRUE;
3271 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3272 argrest += Ustrlen(rsopts[i]);
3273 }
3274 }
3275 }
3276
3277 /* -R: Set string to match in addresses for forced queue run to
3278 pick out particular messages. */
3279
3280 if (*argrest == 0)
3281 {
3282 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3283 {
3284 fprintf(stderr, "exim: string expected after -R\n");
3285 exit(EXIT_FAILURE);
3286 }
3287 }
3288 else deliver_selectstring = argrest;
059ec3d9
PH
3289 break;
3290
3291
3292 /* -r: an obsolete synonym for -f (see above) */
3293
3294
3295 /* -S: Like -R but works on sender. */
3296
3297 case 'S': /* Synonymous with -qS... */
3298 receiving_message = FALSE;
3299
3300 /* -Sf: As -S (below) but force all deliveries,
3301 -Sff: Ditto, but also thaw all frozen messages,
3302 -Sr: String is regex
3303 -Srf: Regex and force
3304 -Srff: Regex and force and thaw
3305
3306 in all cases provided there are no further characters in this
3307 argument. */
3308
3309 if (*argrest != 0)
3310 {
3311 int i;
3312 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3313 {
3314 if (Ustrcmp(argrest, rsopts[i]) == 0)
3315 {
3316 if (i != 2) queue_run_force = TRUE;
3317 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3318 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3319 argrest += Ustrlen(rsopts[i]);
3320 }
3321 }
3322 }
3323
3324 /* -S: Set string to match in addresses for forced queue run to
3325 pick out particular messages. */
3326
3327 if (*argrest == 0)
3328 {
3329 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3330 {
3331 fprintf(stderr, "exim: string expected after -S\n");
3332 exit(EXIT_FAILURE);
3333 }
3334 }
3335 else deliver_selectstring_sender = argrest;
059ec3d9
PH
3336 break;
3337
3338 /* -Tqt is an option that is exclusively for use by the testing suite.
3339 It is not recognized in other circumstances. It allows for the setting up
3340 of explicit "queue times" so that various warning/retry things can be
3341 tested. Otherwise variability of clock ticks etc. cause problems. */
3342
3343 case 'T':
3344 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3345 fudged_queue_times = argv[++i];
3346 else badarg = TRUE;
3347 break;
3348
3349
3350 /* -t: Set flag to extract recipients from body of message. */
3351
3352 case 't':
3353 if (*argrest == 0) extract_recipients = TRUE;
3354
3355 /* -ti: Set flag to extract recipients from body of message, and also
3356 specify that dot does not end the message. */
3357
3358 else if (Ustrcmp(argrest, "i") == 0)
3359 {
3360 extract_recipients = TRUE;
3361 dot_ends = FALSE;
3362 }
3363
3364 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3365
3366 #ifdef SUPPORT_TLS
817d9f57 3367 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3368 #endif
3369
3370 else badarg = TRUE;
3371 break;
3372
3373
3374 /* -U: This means "initial user submission" in sendmail, apparently. The
3375 doc claims that in future sendmail may refuse syntactically invalid
3376 messages instead of fixing them. For the moment, we just ignore it. */
3377
3378 case 'U':
3379 break;
3380
3381
3382 /* -v: verify things - this is a very low-level debugging */
3383
3384 case 'v':
3385 if (*argrest == 0)
3386 {
3387 debug_selector |= D_v;
3388 debug_file = stderr;
3389 }
3390 else badarg = TRUE;
3391 break;
3392
3393
3394 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3395
3396 The -x flag tells the sendmail command that mail from a local
3397 mail program has National Language Support (NLS) extended characters
3398 in the body of the mail item. The sendmail command can send mail with
3399 extended NLS characters across networks that normally corrupts these
3400 8-bit characters.
3401
3402 As Exim is 8-bit clean, it just ignores this flag. */
3403
3404 case 'x':
3405 if (*argrest != 0) badarg = TRUE;
3406 break;
3407
a3fb9793
PP
3408 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3409 logs to that file. We swallow the parameter and otherwise ignore it. */
3410
3411 case 'X':
3412 if (*argrest == '\0')
a3fb9793
PP
3413 if (++i >= argc)
3414 {
3415 fprintf(stderr, "exim: string expected after -X\n");
3416 exit(EXIT_FAILURE);
3417 }
0ad2e0fc
JH
3418 break;
3419
3420 case 'z':
3421 if (*argrest == '\0')
3422 if (++i < argc) log_oneline = argv[i]; else
3423 {
3424 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3425 exit(EXIT_FAILURE);
3426 }
a3fb9793
PP
3427 break;
3428
059ec3d9
PH
3429 /* All other initial characters are errors */
3430
3431 default:
3432 badarg = TRUE;
3433 break;
3434 } /* End of high-level switch statement */
3435
3436 /* Failed to recognize the option, or syntax error */
3437
3438 if (badarg)
3439 {
3440 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3441 "option %s\n", arg);
3442 exit(EXIT_FAILURE);
3443 }
3444 }
3445
3446
3cc66b45
PH
3447/* If -R or -S have been specified without -q, assume a single queue run. */
3448
3449if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3450 queue_interval < 0) queue_interval = 0;
3451
3452
059ec3d9 3453END_ARG:
81ea09ca
NM
3454/* If usage_wanted is set we call the usage function - which never returns */
3455if (usage_wanted) exim_usage(called_as);
3456
3457/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3458if ((
3459 (smtp_input || extract_recipients || recipients_arg < argc) &&
3460 (daemon_listen || queue_interval >= 0 || bi_option ||
3461 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3462 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3463 ) ||
3464 (
3465 msg_action_arg > 0 &&
0ef732d9
PH
3466 (daemon_listen || queue_interval >= 0 || list_options ||
3467 (checking && msg_action != MSG_LOAD) ||
3468 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3469 ) ||
3470 (
3471 (daemon_listen || queue_interval >= 0) &&
3472 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3473 bi_option)
059ec3d9
PH
3474 ) ||
3475 (
3476 daemon_listen && queue_interval == 0
3477 ) ||
3478 (
9ee44efb
PP
3479 inetd_wait_mode && queue_interval >= 0
3480 ) ||
3481 (
059ec3d9
PH
3482 list_options &&
3483 (checking || smtp_input || extract_recipients ||
f05da2e8 3484 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3485 ) ||
3486 (
3487 verify_address_mode &&
3488 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3489 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3490 ) ||
3491 (
3492 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3493 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3494 ) ||
3495 (
f05da2e8 3496 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3497 extract_recipients)
3498 ) ||
3499 (
3500 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3501 ) ||
3502 (
3503 msg_action == MSG_LOAD &&
3504 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3505 )
3506 )
3507 {
3508 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3509 exit(EXIT_FAILURE);
3510 }
3511
3512/* If debugging is set up, set the file and the file descriptor to pass on to
3513child processes. It should, of course, be 2 for stderr. Also, force the daemon
3514to run in the foreground. */
3515
3516if (debug_selector != 0)
3517 {
3518 debug_file = stderr;
3519 debug_fd = fileno(debug_file);
3520 background_daemon = FALSE;
3521 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3522 if (debug_selector != D_v) /* -v only doesn't show this */
3523 {
3524 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3525 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3526 debug_selector);
6545de78
PP
3527 if (!version_printed)
3528 show_whats_supported(stderr);
059ec3d9
PH
3529 }
3530 }
3531
3532/* When started with root privilege, ensure that the limits on the number of
3533open files and the number of processes (where that is accessible) are
3534sufficiently large, or are unset, in case Exim has been called from an
3535environment where the limits are screwed down. Not all OS have the ability to
3536change some of these limits. */
3537
3538if (unprivileged)
3539 {
3540 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3541 }
3542else
3543 {
3544 struct rlimit rlp;
3545
3546 #ifdef RLIMIT_NOFILE
3547 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3548 {
3549 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3550 strerror(errno));
3551 rlp.rlim_cur = rlp.rlim_max = 0;
3552 }
eb2c0248
PH
3553
3554 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3555 be exceeded. It turns out that some older OS have a fixed upper limit of
3556 256. */
eb2c0248 3557
059ec3d9
PH
3558 if (rlp.rlim_cur < 1000)
3559 {
3560 rlp.rlim_cur = rlp.rlim_max = 1000;
3561 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3562 {
a494b1e1
PH
3563 rlp.rlim_cur = rlp.rlim_max = 256;
3564 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3565 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3566 strerror(errno));
eb2c0248 3567 }
059ec3d9
PH
3568 }
3569 #endif
3570
3571 #ifdef RLIMIT_NPROC
3572 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3573 {
3574 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3575 strerror(errno));
3576 rlp.rlim_cur = rlp.rlim_max = 0;
3577 }
3578
3579 #ifdef RLIM_INFINITY
3580 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3581 {
3582 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3583 #else
3584 if (rlp.rlim_cur < 1000)
3585 {
3586 rlp.rlim_cur = rlp.rlim_max = 1000;
3587 #endif
3588 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3589 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3590 strerror(errno));
3591 }
3592 #endif
3593 }
3594
3595/* Exim is normally entered as root (but some special configurations are
3596possible that don't do this). However, it always spins off sub-processes that
3597set their uid and gid as required for local delivery. We don't want to pass on
3598any extra groups that root may belong to, so we want to get rid of them all at
3599this point.
3600
3601We need to obey setgroups() at this stage, before possibly giving up root
3602privilege for a changed configuration file, but later on we might need to
3603check on the additional groups for the admin user privilege - can't do that
3604till after reading the config, which might specify the exim gid. Therefore,
3605save the group list here first. */
3606
3607group_count = getgroups(NGROUPS_MAX, group_list);
cd59ab18
PP
3608if (group_count < 0)
3609 {
3610 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3611 exit(EXIT_FAILURE);
3612 }
059ec3d9
PH
3613
3614/* There is a fundamental difference in some BSD systems in the matter of
3615groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3616known not to be different. On the "different" systems there is a single group
3617list, and the first entry in it is the current group. On all other versions of
3618Unix there is a supplementary group list, which is in *addition* to the current
3619group. Consequently, to get rid of all extraneous groups on a "standard" system
3620you pass over 0 groups to setgroups(), while on a "different" system you pass
3621over a single group - the current group, which is always the first group in the
3622list. Calling setgroups() with zero groups on a "different" system results in
3623an error return. The following code should cope with both types of system.
3624
3625However, if this process isn't running as root, setgroups() can't be used
3626since you have to be root to run it, even if throwing away groups. Not being
3627root here happens only in some unusual configurations. We just ignore the
3628error. */
3629
3630if (setgroups(0, NULL) != 0)
3631 {
3632 if (setgroups(1, group_list) != 0 && !unprivileged)
3633 {
3634 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3635 exit(EXIT_FAILURE);
3636 }
3637 }
3638
3639/* If the configuration file name has been altered by an argument on the
3640command line (either a new file name or a macro definition) and the caller is
cd25e41d
DW
3641not root, or if this is a filter testing run, remove any setuid privilege the
3642program has and run as the underlying user.
059ec3d9 3643
cd25e41d
DW
3644The exim user is locked out of this, which severely restricts the use of -C
3645for some purposes.
059ec3d9
PH
3646
3647Otherwise, set the real ids to the effective values (should be root unless run
3648from inetd, which it can either be root or the exim uid, if one is configured).
3649
3650There is a private mechanism for bypassing some of this, in order to make it
3651possible to test lots of configurations automatically, without having either to
3652recompile each time, or to patch in an actual configuration file name and other
3653values (such as the path name). If running in the test harness, pretend that
3654configuration file changes and macro definitions haven't happened. */
3655
3656if (( /* EITHER */
a7cbbf50
PP
3657 (!trusted_config || /* Config changed, or */
3658 !macros_trusted()) && /* impermissible macros and */
059ec3d9 3659 real_uid != root_uid && /* Not root, and */
059ec3d9
PH
3660 !running_in_test_harness /* Not fudged */
3661 ) || /* OR */
3662 expansion_test /* expansion testing */
3663 || /* OR */
f05da2e8 3664 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3665 {
3666 setgroups(group_count, group_list);
3667 exim_setugid(real_uid, real_gid, FALSE,
3668 US"-C, -D, -be or -bf forces real uid");
3669 removed_privilege = TRUE;
3670
3671 /* In the normal case when Exim is called like this, stderr is available
3672 and should be used for any logging information because attempts to write
3673 to the log will usually fail. To arrange this, we unset really_exim. However,
3674 if no stderr is available there is no point - we might as well have a go
b7487bce 3675 at the log (if it fails, syslog will be written).
059ec3d9 3676
b7487bce
PP
3677 Note that if the invoker is Exim, the logs remain available. Messing with
3678 this causes unlogged successful deliveries. */
3679
3680 if ((log_stderr != NULL) && (real_uid != exim_uid))
3681 really_exim = FALSE;
059ec3d9
PH
3682 }
3683
3684/* Privilege is to be retained for the moment. It may be dropped later,
3685depending on the job that this Exim process has been asked to do. For now, set
3686the real uid to the effective so that subsequent re-execs of Exim are done by a
3687privileged user. */
3688
3689else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3690
f05da2e8 3691/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3692setups and reading the message. */
3693
f05da2e8
PH
3694if ((filter_test & FTEST_SYSTEM) != 0)
3695 {
3696 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3697 if (filter_sfd < 0)
3698 {
3699 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3700 strerror(errno));
3701 return EXIT_FAILURE;
3702 }
3703 }
3704
3705if ((filter_test & FTEST_USER) != 0)
059ec3d9 3706 {
f05da2e8
PH
3707 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3708 if (filter_ufd < 0)
059ec3d9 3709 {
f05da2e8 3710 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3711 strerror(errno));
3712 return EXIT_FAILURE;
3713 }
3714 }
3715
8829633f
PP
3716/* Initialise lookup_list
3717If debugging, already called above via version reporting.
3718In either case, we initialise the list of available lookups while running
3719as root. All dynamically modules are loaded from a directory which is
3720hard-coded into the binary and is code which, if not a module, would be
3721part of Exim already. Ability to modify the content of the directory
3722is equivalent to the ability to modify a setuid binary!
3723
3724This needs to happen before we read the main configuration. */
3725init_lookup_list();
3726
9d4319df
JH
3727#ifdef EXPERIMENTAL_INTERNATIONAL
3728if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3729#endif
3730
059ec3d9
PH
3731/* Read the main runtime configuration data; this gives up if there
3732is a failure. It leaves the configuration file open so that the subsequent
3733configuration data for delivery can be read if needed. */
3734
3735readconf_main();
3736
a3fb9793
PP
3737/* If an action on specific messages is requested, or if a daemon or queue
3738runner is being started, we need to know if Exim was called by an admin user.
3739This is the case if the real user is root or exim, or if the real group is
3740exim, or if one of the supplementary groups is exim or a group listed in
3741admin_groups. We don't fail all message actions immediately if not admin_user,
3742since some actions can be performed by non-admin users. Instead, set admin_user
3743for later interrogation. */
3744
3745if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3746 admin_user = TRUE;
3747else
3748 {
3749 int i, j;
3750 for (i = 0; i < group_count; i++)
3751 {
3752 if (group_list[i] == exim_gid) admin_user = TRUE;
3753 else if (admin_groups != NULL)
3754 {
3755 for (j = 1; j <= (int)(admin_groups[0]); j++)
3756 if (admin_groups[j] == group_list[i])
3757 { admin_user = TRUE; break; }
3758 }
3759 if (admin_user) break;
3760 }
3761 }
3762
3763/* Another group of privileged users are the trusted users. These are root,
3764exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3765are permitted to specify sender_addresses with -f on the command line, and
3766other message parameters as well. */
3767
3768if (real_uid == root_uid || real_uid == exim_uid)
3769 trusted_caller = TRUE;
3770else
3771 {
3772 int i, j;
3773
3774 if (trusted_users != NULL)
3775 {
3776 for (i = 1; i <= (int)(trusted_users[0]); i++)
3777 if (trusted_users[i] == real_uid)
3778 { trusted_caller = TRUE; break; }
3779 }
3780
3781 if (!trusted_caller && trusted_groups != NULL)
3782 {
3783 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3784 {
3785 if (trusted_groups[i] == real_gid)
3786 trusted_caller = TRUE;
3787 else for (j = 0; j < group_count; j++)
3788 {
3789 if (trusted_groups[i] == group_list[j])
3790 { trusted_caller = TRUE; break; }
3791 }
3792 if (trusted_caller) break;
3793 }
3794 }
3795 }
3796
059ec3d9
PH
3797/* Handle the decoding of logging options. */
3798
6c6d6e48 3799decode_bits(log_selector, log_selector_size, log_notall,
ed7f7860 3800 log_selector_string, log_options, log_options_count, US"log", 0);
059ec3d9
PH
3801
3802DEBUG(D_any)
3803 {
6c6d6e48 3804 int i;
059ec3d9 3805 debug_printf("configuration file is %s\n", config_main_filename);
6c6d6e48
TF
3806 debug_printf("log selectors =");
3807 for (i = 0; i < log_selector_size; i++)
3808 debug_printf(" %08x", log_selector[i]);
3809 debug_printf("\n");
059ec3d9
PH
3810 }
3811
3812/* If domain literals are not allowed, check the sender address that was
3813supplied with -f. Ditto for a stripped trailing dot. */
3814
3815if (sender_address != NULL)
3816 {
3817 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3818 {
3819 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3820 "allowed\n", sender_address);
3821 return EXIT_FAILURE;
3822 }
3823 if (f_end_dot && !strip_trailing_dot)
3824 {
3825 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3826 "(trailing dot not allowed)\n", sender_address);
3827 return EXIT_FAILURE;
3828 }
3829 }
3830
a3fb9793
PP
3831/* See if an admin user overrode our logging. */
3832
3833if (cmdline_syslog_name != NULL)
3834 {
3835 if (admin_user)
3836 {
3837 syslog_processname = cmdline_syslog_name;
3838 log_file_path = string_copy(CUS"syslog");
3839 }
3840 else
3841 {
3842 /* not a panic, non-privileged users should not be able to spam paniclog */
3843 fprintf(stderr,
3844 "exim: you lack sufficient privilege to specify syslog process name\n");
3845 return EXIT_FAILURE;
3846 }
3847 }
3848
059ec3d9
PH
3849/* Paranoia check of maximum lengths of certain strings. There is a check
3850on the length of the log file path in log.c, which will come into effect
3851if there are any calls to write the log earlier than this. However, if we
3852get this far but the string is very long, it is better to stop now than to
3853carry on and (e.g.) receive a message and then have to collapse. The call to
3854log_write() from here will cause the ultimate panic collapse if the complete
3855file name exceeds the buffer length. */
3856
3857if (Ustrlen(log_file_path) > 200)
3858 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3859 "log_file_path is longer than 200 chars: aborting");
3860
3861if (Ustrlen(pid_file_path) > 200)
3862 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3863 "pid_file_path is longer than 200 chars: aborting");
3864
3865if (Ustrlen(spool_directory) > 200)
3866 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3867 "spool_directory is longer than 200 chars: aborting");
3868
3869/* Length check on the process name given to syslog for its TAG field,
3870which is only permitted to be 32 characters or less. See RFC 3164. */
3871
3872if (Ustrlen(syslog_processname) > 32)
3873 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3874 "syslog_processname is longer than 32 chars: aborting");
3875
0ad2e0fc
JH
3876if (log_oneline)
3877 {
3878 if (admin_user)
3879 {
3880 log_write(0, LOG_MAIN, "%s", log_oneline);
3881 return EXIT_SUCCESS;
3882 }
3883 else
3884 return EXIT_FAILURE;
3885 }
3886
059ec3d9
PH
3887/* In some operating systems, the environment variable TMPDIR controls where
3888temporary files are created; Exim doesn't use these (apart from when delivering
3889to MBX mailboxes), but called libraries such as DBM libraries may require them.
3890If TMPDIR is found in the environment, reset it to the value defined in the
3891TMPDIR macro, if this macro is defined. */
3892
3893#ifdef TMPDIR
3894 {
3895 uschar **p;
3896 for (p = USS environ; *p != NULL; p++)
3897 {
3898 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
3899 Ustrcmp(*p+7, TMPDIR) != 0)
3900 {
3901 uschar *newp = malloc(Ustrlen(TMPDIR) + 8);
3902 sprintf(CS newp, "TMPDIR=%s", TMPDIR);
3903 *p = newp;
3904 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", TMPDIR);
3905 }
3906 }
3907 }
3908#endif
3909
3910/* Timezone handling. If timezone_string is "utc", set a flag to cause all
3911timestamps to be in UTC (gmtime() is used instead of localtime()). Otherwise,
3912we may need to get rid of a bogus timezone setting. This can arise when Exim is
3913called by a user who has set the TZ variable. This then affects the timestamps
3914in log files and in Received: headers, and any created Date: header lines. The
3915required timezone is settable in the configuration file, so nothing can be done
3916about this earlier - but hopefully nothing will normally be logged earlier than
3917this. We have to make a new environment if TZ is wrong, but don't bother if
3918timestamps_utc is set, because then all times are in UTC anyway. */
3919
3920if (timezone_string != NULL && strcmpic(timezone_string, US"UTC") == 0)
3921 {
3922 timestamps_utc = TRUE;
3923 }
3924else
3925 {
3926 uschar *envtz = US getenv("TZ");
3927 if ((envtz == NULL && timezone_string != NULL) ||
3928 (envtz != NULL &&
3929 (timezone_string == NULL ||
3930 Ustrcmp(timezone_string, envtz) != 0)))
3931 {
3932 uschar **p = USS environ;
3933 uschar **new;
3934 uschar **newp;
3935 int count = 0;
3936 while (*p++ != NULL) count++;
3937 if (envtz == NULL) count++;
3938 newp = new = malloc(sizeof(uschar *) * (count + 1));
3939 for (p = USS environ; *p != NULL; p++)
3940 {
3941 if (Ustrncmp(*p, "TZ=", 3) == 0) continue;
3942 *newp++ = *p;
3943 }
3944 if (timezone_string != NULL)
3945 {
3946 *newp = malloc(Ustrlen(timezone_string) + 4);
3947 sprintf(CS *newp++, "TZ=%s", timezone_string);
3948 }
3949 *newp = NULL;
3950 environ = CSS new;
3951 tzset();
3952 DEBUG(D_any) debug_printf("Reset TZ to %s: time is %s\n", timezone_string,
3953 tod_stamp(tod_log));
3954 }
3955 }
3956
3957/* Handle the case when we have removed the setuid privilege because of -C or
cd25e41d 3958-D. This means that the caller of Exim was not root.
059ec3d9 3959
cd25e41d
DW
3960There is a problem if we were running as the Exim user. The sysadmin may
3961expect this case to retain privilege because "the binary was called by the
3962Exim user", but it hasn't, because either the -D option set macros, or the
261dc43e 3963-C option set a non-trusted configuration file. There are two possibilities:
059ec3d9
PH
3964
3965 (1) If deliver_drop_privilege is set, Exim is not going to re-exec in order
3966 to do message deliveries. Thus, the fact that it is running as a
3967 non-privileged user is plausible, and might be wanted in some special
3968 configurations. However, really_exim will have been set false when
3969 privilege was dropped, to stop Exim trying to write to its normal log
3970 files. Therefore, re-enable normal log processing, assuming the sysadmin
3971 has set up the log directory correctly.
3972
3973 (2) If deliver_drop_privilege is not set, the configuration won't work as
3974 apparently intended, and so we log a panic message. In order to retain
261dc43e
DW
3975 root for -C or -D, the caller must either be root or be invoking a
3976 trusted configuration file (when deliver_drop_privilege is false). */
059ec3d9 3977
e2f5dc15 3978if (removed_privilege && (!trusted_config || macros != NULL) &&
059ec3d9
PH
3979 real_uid == exim_uid)
3980 {
059ec3d9
PH
3981 if (deliver_drop_privilege)
3982 really_exim = TRUE; /* let logging work normally */
3983 else
3984 log_write(0, LOG_MAIN|LOG_PANIC,
cd25e41d 3985 "exim user lost privilege for using %s option",
90b6341f 3986 trusted_config? "-D" : "-C");
059ec3d9
PH
3987 }
3988
3989/* Start up Perl interpreter if Perl support is configured and there is a
3990perl_startup option, and the configuration or the command line specifies
3991initializing starting. Note that the global variables are actually called
3992opt_perl_xxx to avoid clashing with perl's namespace (perl_*). */
3993
3994#ifdef EXIM_PERL
3995if (perl_start_option != 0)
3996 opt_perl_at_start = (perl_start_option > 0);
3997if (opt_perl_at_start && opt_perl_startup != NULL)
3998 {
3999 uschar *errstr;
4000 DEBUG(D_any) debug_printf("Starting Perl interpreter\n");
4001 errstr = init_perl(opt_perl_startup);
4002 if (errstr != NULL)
4003 {
4004 fprintf(stderr, "exim: error in perl_startup code: %s\n", errstr);
4005 return EXIT_FAILURE;
4006 }
4007 opt_perl_started = TRUE;
4008 }