testcase
[exim.git] / src / src / exim.c
CommitLineData
059ec3d9
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1/*************************************************
2* Exim - an Internet mail transport agent *
3*************************************************/
4
80fea873 5/* Copyright (c) University of Cambridge 1995 - 2016 */
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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
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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 };
98a90c36
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68
69
70
71
72/*************************************************
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73* Compile regular expression and panic on fail *
74*************************************************/
75
76/* This function is called when failure to compile a regular expression leads
77to a panic exit. In other cases, pcre_compile() is called directly. In many
78cases where this function is used, the results of the compilation are to be
79placed in long-lived store, so we temporarily reset the store management
80functions that PCRE uses if the use_malloc flag is set.
81
82Argument:
83 pattern the pattern to compile
84 caseless TRUE if caseless matching is required
85 use_malloc TRUE if compile into malloc store
86
87Returns: pointer to the compiled pattern
88*/
89
90const pcre *
476be7e2 91regex_must_compile(const uschar *pattern, BOOL caseless, BOOL use_malloc)
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92{
93int offset;
94int options = PCRE_COPT;
95const pcre *yield;
96const uschar *error;
97if (use_malloc)
98 {
99 pcre_malloc = function_store_malloc;
100 pcre_free = function_store_free;
101 }
102if (caseless) options |= PCRE_CASELESS;
476be7e2 103yield = pcre_compile(CCS pattern, options, (const char **)&error, &offset, NULL);
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104pcre_malloc = function_store_get;
105pcre_free = function_dummy_free;
106if (yield == NULL)
107 log_write(0, LOG_MAIN|LOG_PANIC_DIE, "regular expression error: "
108 "%s at offset %d while compiling %s", error, offset, pattern);
109return yield;
110}
111
112
113
114
115/*************************************************
116* Execute regular expression and set strings *
117*************************************************/
118
119/* This function runs a regular expression match, and sets up the pointers to
120the matched substrings.
121
122Arguments:
123 re the compiled expression
124 subject the subject string
125 options additional PCRE options
126 setup if < 0 do full setup
127 if >= 0 setup from setup+1 onwards,
128 excluding the full matched string
129
130Returns: TRUE or FALSE
131*/
132
133BOOL
1dc92d5a 134regex_match_and_setup(const pcre *re, const uschar *subject, int options, int setup)
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135{
136int ovector[3*(EXPAND_MAXN+1)];
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137uschar * s = string_copy(subject); /* de-constifying */
138int n = pcre_exec(re, NULL, CS s, Ustrlen(s), 0,
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139 PCRE_EOPT | options, ovector, sizeof(ovector)/sizeof(int));
140BOOL yield = n >= 0;
141if (n == 0) n = EXPAND_MAXN + 1;
142if (yield)
143 {
144 int nn;
145 expand_nmax = (setup < 0)? 0 : setup + 1;
146 for (nn = (setup < 0)? 0 : 2; nn < n*2; nn += 2)
147 {
1dc92d5a 148 expand_nstring[expand_nmax] = s + ovector[nn];
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149 expand_nlength[expand_nmax++] = ovector[nn+1] - ovector[nn];
150 }
151 expand_nmax--;
152 }
153return yield;
154}
155
156
157
158
159/*************************************************
921b12ca
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160* Set up processing details *
161*************************************************/
162
163/* Save a text string for dumping when SIGUSR1 is received.
164Do checks for overruns.
165
166Arguments: format and arguments, as for printf()
167Returns: nothing
168*/
169
170void
171set_process_info(const char *format, ...)
172{
173int len;
174va_list ap;
175sprintf(CS process_info, "%5d ", (int)getpid());
176len = Ustrlen(process_info);
177va_start(ap, format);
178if (!string_vformat(process_info + len, PROCESS_INFO_SIZE - len - 2, format, ap))
179 Ustrcpy(process_info + len, "**** string overflowed buffer ****");
180len = Ustrlen(process_info);
181process_info[len+0] = '\n';
182process_info[len+1] = '\0';
183process_info_len = len + 1;
184DEBUG(D_process_info) debug_printf("set_process_info: %s", process_info);
185va_end(ap);
186}
187
188
189
190
191/*************************************************
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192* Handler for SIGUSR1 *
193*************************************************/
194
195/* SIGUSR1 causes any exim process to write to the process log details of
196what it is currently doing. It will only be used if the OS is capable of
197setting up a handler that causes automatic restarting of any system call
198that is in progress at the time.
199
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200This function takes care to be signal-safe.
201
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202Argument: the signal number (SIGUSR1)
203Returns: nothing
204*/
205
206static void
207usr1_handler(int sig)
208{
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209int fd;
210
211os_restarting_signal(sig, usr1_handler);
212
213fd = Uopen(process_log_path, O_APPEND|O_WRONLY, LOG_MODE);
214if (fd < 0)
215 {
216 /* If we are already running as the Exim user, try to create it in the
217 current process (assuming spool_directory exists). Otherwise, if we are
218 root, do the creation in an exim:exim subprocess. */
219
220 int euid = geteuid();
221 if (euid == exim_uid)
222 fd = Uopen(process_log_path, O_CREAT|O_APPEND|O_WRONLY, LOG_MODE);
223 else if (euid == root_uid)
224 fd = log_create_as_exim(process_log_path);
225 }
226
227/* If we are neither exim nor root, or if we failed to create the log file,
228give up. There is not much useful we can do with errors, since we don't want
229to disrupt whatever is going on outside the signal handler. */
230
231if (fd < 0) return;
232
2f21487f 233(void)write(fd, process_info, process_info_len);
921b12ca 234(void)close(fd);
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235}
236
237
238
239/*************************************************
240* Timeout handler *
241*************************************************/
242
243/* This handler is enabled most of the time that Exim is running. The handler
244doesn't actually get used unless alarm() has been called to set a timer, to
245place a time limit on a system call of some kind. When the handler is run, it
246re-enables itself.
247
248There are some other SIGALRM handlers that are used in special cases when more
249than just a flag setting is required; for example, when reading a message's
250input. These are normally set up in the code module that uses them, and the
251SIGALRM handler is reset to this one afterwards.
252
253Argument: the signal value (SIGALRM)
254Returns: nothing
255*/
256
257void
258sigalrm_handler(int sig)
259{
260sig = sig; /* Keep picky compilers happy */
261sigalrm_seen = TRUE;
262os_non_restarting_signal(SIGALRM, sigalrm_handler);
263}
264
265
266
267/*************************************************
268* Sleep for a fractional time interval *
269*************************************************/
270
271/* This function is called by millisleep() and exim_wait_tick() to wait for a
272period of time that may include a fraction of a second. The coding is somewhat
eb2c0248
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273tedious. We do not expect setitimer() ever to fail, but if it does, the process
274will wait for ever, so we panic in this instance. (There was a case of this
275when a bug in a function that calls milliwait() caused it to pass invalid data.
7086e875 276That's when I added the check. :-)
059ec3d9 277
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278We assume it to be not worth sleeping for under 100us; this value will
279require revisiting as hardware advances. This avoids the issue of
280a zero-valued timer setting meaning "never fire".
281
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282Argument: an itimerval structure containing the interval
283Returns: nothing
284*/
285
286static void
287milliwait(struct itimerval *itval)
288{
289sigset_t sigmask;
290sigset_t old_sigmask;
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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
PH
456if (f != NULL) (void)fchmod(fileno(f), mode);
457return f;
458}
459
460
461
462
463/*************************************************
059ec3d9
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464* Ensure stdin, stdout, and stderr exist *
465*************************************************/
466
467/* Some operating systems grumble if an exec() happens without a standard
468input, output, and error (fds 0, 1, 2) being defined. The worry is that some
469file will be opened and will use these fd values, and then some other bit of
470code will assume, for example, that it can write error messages to stderr.
471This function ensures that fds 0, 1, and 2 are open if they do not already
472exist, by connecting them to /dev/null.
473
474This function is also used to ensure that std{in,out,err} exist at all times,
475so that if any library that Exim calls tries to use them, it doesn't crash.
476
477Arguments: None
478Returns: Nothing
479*/
480
481void
482exim_nullstd(void)
483{
484int i;
485int devnull = -1;
486struct stat statbuf;
487for (i = 0; i <= 2; i++)
488 {
489 if (fstat(i, &statbuf) < 0 && errno == EBADF)
490 {
491 if (devnull < 0) devnull = open("/dev/null", O_RDWR);
492 if (devnull < 0) log_write(0, LOG_MAIN|LOG_PANIC_DIE, "%s",
493 string_open_failed(errno, "/dev/null"));
1fe64dcc 494 if (devnull != i) (void)dup2(devnull, i);
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495 }
496 }
1fe64dcc 497if (devnull > 2) (void)close(devnull);
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498}
499
500
501
502
503/*************************************************
504* Close unwanted file descriptors for delivery *
505*************************************************/
506
507/* This function is called from a new process that has been forked to deliver
508an incoming message, either directly, or using exec.
509
510We want any smtp input streams to be closed in this new process. However, it
511has been observed that using fclose() here causes trouble. When reading in -bS
512input, duplicate copies of messages have been seen. The files will be sharing a
513file pointer with the parent process, and it seems that fclose() (at least on
514some systems - I saw this on Solaris 2.5.1) messes with that file pointer, at
515least sometimes. Hence we go for closing the underlying file descriptors.
516
517If TLS is active, we want to shut down the TLS library, but without molesting
518the parent's SSL connection.
519
520For delivery of a non-SMTP message, we want to close stdin and stdout (and
521stderr unless debugging) because the calling process might have set them up as
522pipes and be waiting for them to close before it waits for the submission
523process to terminate. If they aren't closed, they hold up the calling process
524until the initial delivery process finishes, which is not what we want.
525
526Exception: We do want it for synchronous delivery!
527
528And notwithstanding all the above, if D_resolver is set, implying resolver
529debugging, leave stdout open, because that's where the resolver writes its
530debugging output.
531
532When we close stderr (which implies we've also closed stdout), we also get rid
533of any controlling terminal.
534
535Arguments: None
536Returns: Nothing
537*/
538
539static void
540close_unwanted(void)
541{
542if (smtp_input)
543 {
544 #ifdef SUPPORT_TLS
a400eccf 545 tls_close(TRUE, FALSE); /* Shut down the TLS library */
059ec3d9 546 #endif
1fe64dcc
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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
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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
74f150bf
JH
817#ifndef DISABLE_DKIM
818 fprintf(f, " DKIM");
819#endif
ef1bbb27
HSHR
820#ifndef DISABLE_DNSSEC
821 fprintf(f, " DNSSEC");
822#endif
0cbf2b82
JH
823#ifndef DISABLE_EVENT
824 fprintf(f, " Event");
825#endif
8c5d388a
JH
826#ifdef SUPPORT_I18N
827 fprintf(f, " I18N");
828#endif
74f150bf
JH
829#ifndef DISABLE_OCSP
830 fprintf(f, " OCSP");
831#endif
4d832da1
TL
832#ifndef DISABLE_PRDR
833 fprintf(f, " PRDR");
834#endif
cee5f132
JH
835#ifdef SUPPORT_PROXY
836 fprintf(f, " PROXY");
837#endif
f0989ec0 838#ifdef SUPPORT_SOCKS
74f150bf 839 fprintf(f, " SOCKS");
f2de3a33 840#endif
8523533c
TK
841#ifdef EXPERIMENTAL_SPF
842 fprintf(f, " Experimental_SPF");
843#endif
844#ifdef EXPERIMENTAL_SRS
845 fprintf(f, " Experimental_SRS");
846#endif
847#ifdef EXPERIMENTAL_BRIGHTMAIL
848 fprintf(f, " Experimental_Brightmail");
849#endif
043b1248
JH
850#ifdef EXPERIMENTAL_DANE
851 fprintf(f, " Experimental_DANE");
852#endif
6a8f9482
TK
853#ifdef EXPERIMENTAL_DCC
854 fprintf(f, " Experimental_DCC");
855#endif
4840604e
TL
856#ifdef EXPERIMENTAL_DMARC
857 fprintf(f, " Experimental_DMARC");
858#endif
895fbaf2
JH
859#ifdef EXPERIMENTAL_DSN_INFO
860 fprintf(f, " Experimental_DSN_info");
861#endif
059ec3d9
PH
862fprintf(f, "\n");
863
e6d225ae
DW
864fprintf(f, "Lookups (built-in):");
865#if defined(LOOKUP_LSEARCH) && LOOKUP_LSEARCH!=2
059ec3d9
PH
866 fprintf(f, " lsearch wildlsearch nwildlsearch iplsearch");
867#endif
e6d225ae 868#if defined(LOOKUP_CDB) && LOOKUP_CDB!=2
059ec3d9
PH
869 fprintf(f, " cdb");
870#endif
e6d225ae 871#if defined(LOOKUP_DBM) && LOOKUP_DBM!=2
4a6a987a 872 fprintf(f, " dbm dbmjz dbmnz");
059ec3d9 873#endif
e6d225ae 874#if defined(LOOKUP_DNSDB) && LOOKUP_DNSDB!=2
059ec3d9
PH
875 fprintf(f, " dnsdb");
876#endif
e6d225ae 877#if defined(LOOKUP_DSEARCH) && LOOKUP_DSEARCH!=2
059ec3d9
PH
878 fprintf(f, " dsearch");
879#endif
e6d225ae 880#if defined(LOOKUP_IBASE) && LOOKUP_IBASE!=2
059ec3d9
PH
881 fprintf(f, " ibase");
882#endif
e6d225ae 883#if defined(LOOKUP_LDAP) && LOOKUP_LDAP!=2
059ec3d9
PH
884 fprintf(f, " ldap ldapdn ldapm");
885#endif
e6d225ae 886#if defined(LOOKUP_MYSQL) && LOOKUP_MYSQL!=2
059ec3d9
PH
887 fprintf(f, " mysql");
888#endif
e6d225ae 889#if defined(LOOKUP_NIS) && LOOKUP_NIS!=2
059ec3d9
PH
890 fprintf(f, " nis nis0");
891#endif
e6d225ae 892#if defined(LOOKUP_NISPLUS) && LOOKUP_NISPLUS!=2
059ec3d9
PH
893 fprintf(f, " nisplus");
894#endif
e6d225ae 895#if defined(LOOKUP_ORACLE) && LOOKUP_ORACLE!=2
059ec3d9
PH
896 fprintf(f, " oracle");
897#endif
e6d225ae 898#if defined(LOOKUP_PASSWD) && LOOKUP_PASSWD!=2
059ec3d9
PH
899 fprintf(f, " passwd");
900#endif
e6d225ae 901#if defined(LOOKUP_PGSQL) && LOOKUP_PGSQL!=2
059ec3d9
PH
902 fprintf(f, " pgsql");
903#endif
de78e2d5
JH
904#if defined(LOOKUP_REDIS) && LOOKUP_REDIS!=2
905 fprintf(f, " redis");
906#endif
e6d225ae 907#if defined(LOOKUP_SQLITE) && LOOKUP_SQLITE!=2
13b685f9
PH
908 fprintf(f, " sqlite");
909#endif
e6d225ae 910#if defined(LOOKUP_TESTDB) && LOOKUP_TESTDB!=2
059ec3d9
PH
911 fprintf(f, " testdb");
912#endif
e6d225ae 913#if defined(LOOKUP_WHOSON) && LOOKUP_WHOSON!=2
059ec3d9
PH
914 fprintf(f, " whoson");
915#endif
916fprintf(f, "\n");
917
918fprintf(f, "Authenticators:");
919#ifdef AUTH_CRAM_MD5
920 fprintf(f, " cram_md5");
921#endif
922#ifdef AUTH_CYRUS_SASL
923 fprintf(f, " cyrus_sasl");
924#endif
14aa5a05
PH
925#ifdef AUTH_DOVECOT
926 fprintf(f, " dovecot");
927#endif
44bbabb5
PP
928#ifdef AUTH_GSASL
929 fprintf(f, " gsasl");
930#endif
dde3daac
PP
931#ifdef AUTH_HEIMDAL_GSSAPI
932 fprintf(f, " heimdal_gssapi");
933#endif
059ec3d9
PH
934#ifdef AUTH_PLAINTEXT
935 fprintf(f, " plaintext");
936#endif
937#ifdef AUTH_SPA
938 fprintf(f, " spa");
939#endif
b3ef41c9
JH
940#ifdef AUTH_TLS
941 fprintf(f, " tls");
942#endif
059ec3d9
PH
943fprintf(f, "\n");
944
945fprintf(f, "Routers:");
946#ifdef ROUTER_ACCEPT
947 fprintf(f, " accept");
948#endif
949#ifdef ROUTER_DNSLOOKUP
950 fprintf(f, " dnslookup");
951#endif
952#ifdef ROUTER_IPLITERAL
953 fprintf(f, " ipliteral");
954#endif
955#ifdef ROUTER_IPLOOKUP
956 fprintf(f, " iplookup");
957#endif
958#ifdef ROUTER_MANUALROUTE
959 fprintf(f, " manualroute");
960#endif
961#ifdef ROUTER_QUERYPROGRAM
962 fprintf(f, " queryprogram");
963#endif
964#ifdef ROUTER_REDIRECT
965 fprintf(f, " redirect");
966#endif
967fprintf(f, "\n");
968
969fprintf(f, "Transports:");
970#ifdef TRANSPORT_APPENDFILE
971 fprintf(f, " appendfile");
972 #ifdef SUPPORT_MAILDIR
973 fprintf(f, "/maildir");
974 #endif
975 #ifdef SUPPORT_MAILSTORE
976 fprintf(f, "/mailstore");
977 #endif
978 #ifdef SUPPORT_MBX
979 fprintf(f, "/mbx");
980 #endif
981#endif
982#ifdef TRANSPORT_AUTOREPLY
983 fprintf(f, " autoreply");
984#endif
985#ifdef TRANSPORT_LMTP
986 fprintf(f, " lmtp");
987#endif
988#ifdef TRANSPORT_PIPE
989 fprintf(f, " pipe");
990#endif
991#ifdef TRANSPORT_SMTP
992 fprintf(f, " smtp");
993#endif
994fprintf(f, "\n");
995
996if (fixed_never_users[0] > 0)
997 {
998 int i;
999 fprintf(f, "Fixed never_users: ");
1000 for (i = 1; i <= (int)fixed_never_users[0] - 1; i++)
1001 fprintf(f, "%d:", (unsigned int)fixed_never_users[i]);
1002 fprintf(f, "%d\n", (unsigned int)fixed_never_users[i]);
1003 }
21c28500 1004
73a46702 1005fprintf(f, "Size of off_t: " SIZE_T_FMT "\n", sizeof(off_t));
36f12725 1006
6545de78
PP
1007/* Everything else is details which are only worth reporting when debugging.
1008Perhaps the tls_version_report should move into this too. */
1009DEBUG(D_any) do {
1010
1011 int i;
1012
b3c261f7
PP
1013/* clang defines __GNUC__ (at least, for me) so test for it first */
1014#if defined(__clang__)
1015 fprintf(f, "Compiler: CLang [%s]\n", __clang_version__);
1016#elif defined(__GNUC__)
1017 fprintf(f, "Compiler: GCC [%s]\n",
1018# ifdef __VERSION__
1019 __VERSION__
1020# else
1021 "? unknown version ?"
1022# endif
1023 );
1024#else
1025 fprintf(f, "Compiler: <unknown>\n");
1026#endif
1027
754a0503
PP
1028#ifdef SUPPORT_TLS
1029 tls_version_report(f);
1030#endif
8c5d388a 1031#ifdef SUPPORT_I18N
b04be5e7
JH
1032 utf8_version_report(f);
1033#endif
754a0503 1034
fc362fc5
JH
1035 for (authi = auths_available; *authi->driver_name != '\0'; ++authi)
1036 if (authi->version_report)
44bbabb5 1037 (*authi->version_report)(f);
6545de78 1038
decd95cb 1039 /* PCRE_PRERELEASE is either defined and empty or a bare sequence of
6475bd82
PP
1040 characters; unless it's an ancient version of PCRE in which case it
1041 is not defined. */
1042#ifndef PCRE_PRERELEASE
1043#define PCRE_PRERELEASE
1044#endif
1045#define QUOTE(X) #X
1046#define EXPAND_AND_QUOTE(X) QUOTE(X)
6545de78
PP
1047 fprintf(f, "Library version: PCRE: Compile: %d.%d%s\n"
1048 " Runtime: %s\n",
1049 PCRE_MAJOR, PCRE_MINOR,
6475bd82 1050 EXPAND_AND_QUOTE(PCRE_PRERELEASE) "",
6545de78 1051 pcre_version());
6475bd82
PP
1052#undef QUOTE
1053#undef EXPAND_AND_QUOTE
6545de78
PP
1054
1055 init_lookup_list();
1056 for (i = 0; i < lookup_list_count; i++)
6545de78
PP
1057 if (lookup_list[i]->version_report)
1058 lookup_list[i]->version_report(f);
6545de78 1059
b70d2586
PP
1060#ifdef WHITELIST_D_MACROS
1061 fprintf(f, "WHITELIST_D_MACROS: \"%s\"\n", WHITELIST_D_MACROS);
1062#else
1063 fprintf(f, "WHITELIST_D_MACROS unset\n");
1064#endif
1065#ifdef TRUSTED_CONFIG_LIST
1066 fprintf(f, "TRUSTED_CONFIG_LIST: \"%s\"\n", TRUSTED_CONFIG_LIST);
1067#else
1068 fprintf(f, "TRUSTED_CONFIG_LIST unset\n");
1069#endif
1070
6545de78 1071} while (0);
059ec3d9
PH
1072}
1073
1074
98a90c36
PP
1075/*************************************************
1076* Show auxiliary information about Exim *
1077*************************************************/
1078
1079static void
1080show_exim_information(enum commandline_info request, FILE *stream)
1081{
1082const uschar **pp;
1083
1084switch(request)
1085 {
1086 case CMDINFO_NONE:
1087 fprintf(stream, "Oops, something went wrong.\n");
1088 return;
1089 case CMDINFO_HELP:
1090 fprintf(stream,
1091"The -bI: flag takes a string indicating which information to provide.\n"
1092"If the string is not recognised, you'll get this help (on stderr).\n"
1093"\n"
1094" exim -bI:help this information\n"
36a3ae5f 1095" exim -bI:dscp dscp value keywords known\n"
98a90c36
PP
1096" exim -bI:sieve list of supported sieve extensions, one per line.\n"
1097);
1098 return;
1099 case CMDINFO_SIEVE:
1100 for (pp = exim_sieve_extension_list; *pp; ++pp)
1101 fprintf(stream, "%s\n", *pp);
1102 return;
36a3ae5f
PP
1103 case CMDINFO_DSCP:
1104 dscp_list_to_stream(stream);
1105 return;
98a90c36
PP
1106 }
1107}
059ec3d9
PH
1108
1109
1110/*************************************************
1111* Quote a local part *
1112*************************************************/
1113
1114/* This function is used when a sender address or a From: or Sender: header
1115line is being created from the caller's login, or from an authenticated_id. It
1116applies appropriate quoting rules for a local part.
1117
1118Argument: the local part
1119Returns: the local part, quoted if necessary
1120*/
1121
1122uschar *
1123local_part_quote(uschar *lpart)
1124{
1125BOOL needs_quote = FALSE;
1126int size, ptr;
1127uschar *yield;
1128uschar *t;
1129
1130for (t = lpart; !needs_quote && *t != 0; t++)
1131 {
1132 needs_quote = !isalnum(*t) && strchr("!#$%&'*+-/=?^_`{|}~", *t) == NULL &&
1133 (*t != '.' || t == lpart || t[1] == 0);
1134 }
1135
1136if (!needs_quote) return lpart;
1137
1138size = ptr = 0;
c2f669a4 1139yield = string_catn(NULL, &size, &ptr, US"\"", 1);
059ec3d9
PH
1140
1141for (;;)
1142 {
1143 uschar *nq = US Ustrpbrk(lpart, "\\\"");
1144 if (nq == NULL)
1145 {
c2f669a4 1146 yield = string_cat(yield, &size, &ptr, lpart);
059ec3d9
PH
1147 break;
1148 }
c2f669a4
JH
1149 yield = string_catn(yield, &size, &ptr, lpart, nq - lpart);
1150 yield = string_catn(yield, &size, &ptr, US"\\", 1);
1151 yield = string_catn(yield, &size, &ptr, nq, 1);
059ec3d9
PH
1152 lpart = nq + 1;
1153 }
1154
c2f669a4 1155yield = string_catn(yield, &size, &ptr, US"\"", 1);
059ec3d9
PH
1156yield[ptr] = 0;
1157return yield;
1158}
1159
1160
1161
1162#ifdef USE_READLINE
1163/*************************************************
1164* Load readline() functions *
1165*************************************************/
1166
1167/* This function is called from testing executions that read data from stdin,
1168but only when running as the calling user. Currently, only -be does this. The
1169function loads the readline() function library and passes back the functions.
1170On some systems, it needs the curses library, so load that too, but try without
1171it if loading fails. All this functionality has to be requested at build time.
1172
1173Arguments:
1174 fn_readline_ptr pointer to where to put the readline pointer
1175 fn_addhist_ptr pointer to where to put the addhistory function
1176
1177Returns: the dlopen handle or NULL on failure
1178*/
1179
1180static void *
1ba28e2b
PP
1181set_readline(char * (**fn_readline_ptr)(const char *),
1182 void (**fn_addhist_ptr)(const char *))
059ec3d9
PH
1183{
1184void *dlhandle;
e12f8c32 1185void *dlhandle_curses = dlopen("libcurses." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_LAZY);
059ec3d9 1186
e12f8c32 1187dlhandle = dlopen("libreadline." DYNLIB_FN_EXT, RTLD_GLOBAL|RTLD_NOW);
059ec3d9
PH
1188if (dlhandle_curses != NULL) dlclose(dlhandle_curses);
1189
1190if (dlhandle != NULL)
1191 {
1ba28e2b
PP
1192 /* Checked manual pages; at least in GNU Readline 6.1, the prototypes are:
1193 * char * readline (const char *prompt);
1194 * void add_history (const char *string);
1195 */
1196 *fn_readline_ptr = (char *(*)(const char*))dlsym(dlhandle, "readline");
1197 *fn_addhist_ptr = (void(*)(const char*))dlsym(dlhandle, "add_history");
059ec3d9
PH
1198 }
1199else
1200 {
1201 DEBUG(D_any) debug_printf("failed to load readline: %s\n", dlerror());
1202 }
1203
1204return dlhandle;
1205}
1206#endif
1207
1208
1209
1210/*************************************************
1211* Get a line from stdin for testing things *
1212*************************************************/
1213
1214/* This function is called when running tests that can take a number of lines
1215of input (for example, -be and -bt). It handles continuations and trailing
1216spaces. And prompting and a blank line output on eof. If readline() is in use,
1217the arguments are non-NULL and provide the relevant functions.
1218
1219Arguments:
1220 fn_readline readline function or NULL
1221 fn_addhist addhist function or NULL
1222
1223Returns: pointer to dynamic memory, or NULL at end of file
1224*/
1225
1226static uschar *
1ba28e2b 1227get_stdinput(char *(*fn_readline)(const char *), void(*fn_addhist)(const char *))
059ec3d9
PH
1228{
1229int i;
1230int size = 0;
1231int ptr = 0;
1232uschar *yield = NULL;
1233
328895cc 1234if (fn_readline == NULL) { printf("> "); fflush(stdout); }
059ec3d9
PH
1235
1236for (i = 0;; i++)
1237 {
1238 uschar buffer[1024];
1239 uschar *p, *ss;
1240
1241 #ifdef USE_READLINE
1242 char *readline_line = NULL;
1243 if (fn_readline != NULL)
1244 {
1245 if ((readline_line = fn_readline((i > 0)? "":"> ")) == NULL) break;
1246 if (*readline_line != 0 && fn_addhist != NULL) fn_addhist(readline_line);
1247 p = US readline_line;
1248 }
1249 else
1250 #endif
1251
1252 /* readline() not in use */
1253
1254 {
1255 if (Ufgets(buffer, sizeof(buffer), stdin) == NULL) break;
1256 p = buffer;
1257 }
1258
1259 /* Handle the line */
1260
1261 ss = p + (int)Ustrlen(p);
1262 while (ss > p && isspace(ss[-1])) ss--;
1263
1264 if (i > 0)
1265 {
1266 while (p < ss && isspace(*p)) p++; /* leading space after cont */
1267 }
1268
c2f669a4 1269 yield = string_catn(yield, &size, &ptr, p, ss - p);
059ec3d9
PH
1270
1271 #ifdef USE_READLINE
1272 if (fn_readline != NULL) free(readline_line);
1273 #endif
1274
5f5be492 1275 /* yield can only be NULL if ss==p */
059ec3d9
PH
1276 if (ss == p || yield[ptr-1] != '\\')
1277 {
5f5be492 1278 if (yield) yield[ptr] = 0;
059ec3d9
PH
1279 break;
1280 }
1281 yield[--ptr] = 0;
1282 }
1283
1284if (yield == NULL) printf("\n");
1285return yield;
1286}
1287
1288
1289
1290/*************************************************
81ea09ca
NM
1291* Output usage information for the program *
1292*************************************************/
1293
1294/* This function is called when there are no recipients
1295 or a specific --help argument was added.
1296
1297Arguments:
1298 progname information on what name we were called by
1299
1300Returns: DOES NOT RETURN
1301*/
1302
1303static void
1304exim_usage(uschar *progname)
1305{
1306
1307/* Handle specific program invocation varients */
1308if (Ustrcmp(progname, US"-mailq") == 0)
1309 {
1310 fprintf(stderr,
e765a0f1 1311 "mailq - list the contents of the mail queue\n\n"
81ea09ca
NM
1312 "For a list of options, see the Exim documentation.\n");
1313 exit(EXIT_FAILURE);
1314 }
1315
1316/* Generic usage - we output this whatever happens */
1317fprintf(stderr,
1318 "Exim is a Mail Transfer Agent. It is normally called by Mail User Agents,\n"
1319 "not directly from a shell command line. Options and/or arguments control\n"
1320 "what it does when called. For a list of options, see the Exim documentation.\n");
1321
1322exit(EXIT_FAILURE);
1323}
1324
1325
1326
1327/*************************************************
a7cbbf50
PP
1328* Validate that the macros given are okay *
1329*************************************************/
1330
1331/* Typically, Exim will drop privileges if macros are supplied. In some
1332cases, we want to not do so.
1333
1334Arguments: none (macros is a global)
1335Returns: true if trusted, false otherwise
1336*/
1337
1338static BOOL
1339macros_trusted(void)
1340{
1341#ifdef WHITELIST_D_MACROS
1342macro_item *m;
1343uschar *whitelisted, *end, *p, **whites, **w;
1344int white_count, i, n;
1345size_t len;
1346BOOL prev_char_item, found;
1347#endif
1348
1349if (macros == NULL)
1350 return TRUE;
1351#ifndef WHITELIST_D_MACROS
1352return FALSE;
1353#else
1354
66581d1e
PP
1355/* We only trust -D overrides for some invoking users:
1356root, the exim run-time user, the optional config owner user.
1357I don't know why config-owner would be needed, but since they can own the
1358config files anyway, there's no security risk to letting them override -D. */
1359if ( ! ((real_uid == root_uid)
1360 || (real_uid == exim_uid)
1361#ifdef CONFIGURE_OWNER
1362 || (real_uid == config_uid)
1363#endif
1364 ))
1365 {
1366 debug_printf("macros_trusted rejecting macros for uid %d\n", (int) real_uid);
1367 return FALSE;
1368 }
1369
a7cbbf50
PP
1370/* Get a list of macros which are whitelisted */
1371whitelisted = string_copy_malloc(US WHITELIST_D_MACROS);
1372prev_char_item = FALSE;
1373white_count = 0;
1374for (p = whitelisted; *p != '\0'; ++p)
1375 {
1376 if (*p == ':' || isspace(*p))
1377 {
1378 *p = '\0';
1379 if (prev_char_item)
1380 ++white_count;
1381 prev_char_item = FALSE;
1382 continue;
1383 }
1384 if (!prev_char_item)
1385 prev_char_item = TRUE;
1386 }
1387end = p;
1388if (prev_char_item)
1389 ++white_count;
1390if (!white_count)
1391 return FALSE;
1392whites = store_malloc(sizeof(uschar *) * (white_count+1));
1393for (p = whitelisted, i = 0; (p != end) && (i < white_count); ++p)
1394 {
1395 if (*p != '\0')
1396 {
1397 whites[i++] = p;
1398 if (i == white_count)
1399 break;
1400 while (*p != '\0' && p < end)
1401 ++p;
1402 }
1403 }
1404whites[i] = NULL;
1405
1406/* The list of macros should be very short. Accept the N*M complexity. */
1407for (m = macros; m != NULL; m = m->next)
1408 {
1409 found = FALSE;
1410 for (w = whites; *w; ++w)
1411 if (Ustrcmp(*w, m->name) == 0)
1412 {
1413 found = TRUE;
1414 break;
1415 }
1416 if (!found)
1417 return FALSE;
1418 if (m->replacement == NULL)
1419 continue;
1420 len = Ustrlen(m->replacement);
1421 if (len == 0)
1422 continue;
1423 n = pcre_exec(regex_whitelisted_macro, NULL, CS m->replacement, len,
1424 0, PCRE_EOPT, NULL, 0);
1425 if (n < 0)
1426 {
1427 if (n != PCRE_ERROR_NOMATCH)
1428 debug_printf("macros_trusted checking %s returned %d\n", m->name, n);
1429 return FALSE;
1430 }
1431 }
43236f35 1432DEBUG(D_any) debug_printf("macros_trusted overridden to true by whitelisting\n");
a7cbbf50
PP
1433return TRUE;
1434#endif
1435}
1436
1437
1438/*************************************************
059ec3d9
PH
1439* Entry point and high-level code *
1440*************************************************/
1441
1442/* Entry point for the Exim mailer. Analyse the arguments and arrange to take
1443the appropriate action. All the necessary functions are present in the one
1444binary. I originally thought one should split it up, but it turns out that so
1445much of the apparatus is needed in each chunk that one might as well just have
1446it all available all the time, which then makes the coding easier as well.
1447
1448Arguments:
1449 argc count of entries in argv
1450 argv argument strings, with argv[0] being the program name
1451
1452Returns: EXIT_SUCCESS if terminated successfully
1453 EXIT_FAILURE otherwise, except when a message has been sent
1454 to the sender, and -oee was given
1455*/
1456
1457int
1458main(int argc, char **cargv)
1459{
1460uschar **argv = USS cargv;
1461int arg_receive_timeout = -1;
1462int arg_smtp_receive_timeout = -1;
1463int arg_error_handling = error_handling;
f05da2e8
PH
1464int filter_sfd = -1;
1465int filter_ufd = -1;
059ec3d9 1466int group_count;
1670ef10 1467int i, rv;
059ec3d9
PH
1468int list_queue_option = 0;
1469int msg_action = 0;
1470int msg_action_arg = -1;
1471int namelen = (argv[0] == NULL)? 0 : Ustrlen(argv[0]);
1472int queue_only_reason = 0;
1473#ifdef EXIM_PERL
1474int perl_start_option = 0;
1475#endif
1476int recipients_arg = argc;
1477int sender_address_domain = 0;
1478int test_retry_arg = -1;
1479int test_rewrite_arg = -1;
1480BOOL arg_queue_only = FALSE;
1481BOOL bi_option = FALSE;
1482BOOL checking = FALSE;
1483BOOL count_queue = FALSE;
1484BOOL expansion_test = FALSE;
1485BOOL extract_recipients = FALSE;
f4ee74ac 1486BOOL flag_G = FALSE;
12f69989 1487BOOL flag_n = FALSE;
059ec3d9
PH
1488BOOL forced_delivery = FALSE;
1489BOOL f_end_dot = FALSE;
1490BOOL deliver_give_up = FALSE;
1491BOOL list_queue = FALSE;
1492BOOL list_options = FALSE;
bf3c2c6b 1493BOOL list_config = FALSE;
059ec3d9
PH
1494BOOL local_queue_only;
1495BOOL more = TRUE;
1496BOOL one_msg_action = FALSE;
1497BOOL queue_only_set = FALSE;
1498BOOL receiving_message = TRUE;
33d73e3b 1499BOOL sender_ident_set = FALSE;
8669f003 1500BOOL session_local_queue_only;
059ec3d9
PH
1501BOOL unprivileged;
1502BOOL removed_privilege = FALSE;
81ea09ca 1503BOOL usage_wanted = FALSE;
059ec3d9
PH
1504BOOL verify_address_mode = FALSE;
1505BOOL verify_as_sender = FALSE;
1506BOOL version_printed = FALSE;
1507uschar *alias_arg = NULL;
1508uschar *called_as = US"";
a3fb9793 1509uschar *cmdline_syslog_name = NULL;
059ec3d9
PH
1510uschar *start_queue_run_id = NULL;
1511uschar *stop_queue_run_id = NULL;
328895cc 1512uschar *expansion_test_message = NULL;
059ec3d9
PH
1513uschar *ftest_domain = NULL;
1514uschar *ftest_localpart = NULL;
1515uschar *ftest_prefix = NULL;
1516uschar *ftest_suffix = NULL;
0ad2e0fc 1517uschar *log_oneline = NULL;
8544e77a 1518uschar *malware_test_file = NULL;
059ec3d9
PH
1519uschar *real_sender_address;
1520uschar *originator_home = US"/";
a3fb9793 1521size_t sz;
059ec3d9
PH
1522void *reset_point;
1523
1524struct passwd *pw;
1525struct stat statbuf;
1526pid_t passed_qr_pid = (pid_t)0;
1527int passed_qr_pipe = -1;
1528gid_t group_list[NGROUPS_MAX];
1529
98a90c36
PP
1530/* For the -bI: flag */
1531enum commandline_info info_flag = CMDINFO_NONE;
1532BOOL info_stdout = FALSE;
1533
059ec3d9
PH
1534/* Possible options for -R and -S */
1535
1536static uschar *rsopts[] = { US"f", US"ff", US"r", US"rf", US"rff" };
1537
1538/* Need to define this in case we need to change the environment in order
1539to get rid of a bogus time zone. We have to make it char rather than uschar
1540because some OS define it in /usr/include/unistd.h. */
1541
1542extern char **environ;
1543
35edf2ff 1544/* If the Exim user and/or group and/or the configuration file owner/group were
059ec3d9
PH
1545defined by ref:name at build time, we must now find the actual uid/gid values.
1546This is a feature to make the lives of binary distributors easier. */
1547
1548#ifdef EXIM_USERNAME
1549if (route_finduser(US EXIM_USERNAME, &pw, &exim_uid))
1550 {
10385c15
PP
1551 if (exim_uid == 0)
1552 {
1553 fprintf(stderr, "exim: refusing to run with uid 0 for \"%s\"\n",
1554 EXIM_USERNAME);
1555 exit(EXIT_FAILURE);
1556 }
084c1d8c
PP
1557 /* If ref:name uses a number as the name, route_finduser() returns
1558 TRUE with exim_uid set and pw coerced to NULL. */
1559 if (pw)
1560 exim_gid = pw->pw_gid;
1561#ifndef EXIM_GROUPNAME
1562 else
1563 {
1564 fprintf(stderr,
1565 "exim: ref:name should specify a usercode, not a group.\n"
1566 "exim: can't let you get away with it unless you also specify a group.\n");
1567 exit(EXIT_FAILURE);
1568 }
1569#endif
059ec3d9
PH
1570 }
1571else
1572 {
1573 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1574 EXIM_USERNAME);
1575 exit(EXIT_FAILURE);
1576 }
1577#endif
1578
1579#ifdef EXIM_GROUPNAME
1580if (!route_findgroup(US EXIM_GROUPNAME, &exim_gid))
1581 {
1582 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1583 EXIM_GROUPNAME);
1584 exit(EXIT_FAILURE);
1585 }
1586#endif
1587
1588#ifdef CONFIGURE_OWNERNAME
1589if (!route_finduser(US CONFIGURE_OWNERNAME, NULL, &config_uid))
1590 {
1591 fprintf(stderr, "exim: failed to find uid for user name \"%s\"\n",
1592 CONFIGURE_OWNERNAME);
1593 exit(EXIT_FAILURE);
1594 }
1595#endif
1596
79d4bc3d
PP
1597/* We default the system_filter_user to be the Exim run-time user, as a
1598sane non-root value. */
1599system_filter_uid = exim_uid;
1600
35edf2ff
PH
1601#ifdef CONFIGURE_GROUPNAME
1602if (!route_findgroup(US CONFIGURE_GROUPNAME, &config_gid))
1603 {
1604 fprintf(stderr, "exim: failed to find gid for group name \"%s\"\n",
1605 CONFIGURE_GROUPNAME);
1606 exit(EXIT_FAILURE);
1607 }
1608#endif
1609
92e6a3d9
JH
1610/* In the Cygwin environment, some initialization used to need doing.
1611It was fudged in by means of this macro; now no longer but we'll leave
1612it in case of others. */
059ec3d9
PH
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
059ec3d9
PH
1761/* If the program is called as "mailq" treat it as equivalent to "exim -bp";
1762this seems to be a generally accepted convention, since one finds symbolic
1763links called "mailq" in standard OS configurations. */
1764
1765if ((namelen == 5 && Ustrcmp(argv[0], "mailq") == 0) ||
1766 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/mailq", 6) == 0))
1767 {
1768 list_queue = TRUE;
1769 receiving_message = FALSE;
1770 called_as = US"-mailq";
1771 }
1772
1773/* If the program is called as "rmail" treat it as equivalent to
1774"exim -i -oee", thus allowing UUCP messages to be input using non-SMTP mode,
1775i.e. preventing a single dot on a line from terminating the message, and
1776returning with zero return code, even in cases of error (provided an error
1777message has been sent). */
1778
1779if ((namelen == 5 && Ustrcmp(argv[0], "rmail") == 0) ||
1780 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rmail", 6) == 0))
1781 {
1782 dot_ends = FALSE;
1783 called_as = US"-rmail";
1784 errors_sender_rc = EXIT_SUCCESS;
1785 }
1786
1787/* If the program is called as "rsmtp" treat it as equivalent to "exim -bS";
1788this is a smail convention. */
1789
1790if ((namelen == 5 && Ustrcmp(argv[0], "rsmtp") == 0) ||
1791 (namelen > 5 && Ustrncmp(argv[0] + namelen - 6, "/rsmtp", 6) == 0))
1792 {
1793 smtp_input = smtp_batched_input = TRUE;
1794 called_as = US"-rsmtp";
1795 }
1796
1797/* If the program is called as "runq" treat it as equivalent to "exim -q";
1798this is a smail convention. */
1799
1800if ((namelen == 4 && Ustrcmp(argv[0], "runq") == 0) ||
1801 (namelen > 4 && Ustrncmp(argv[0] + namelen - 5, "/runq", 5) == 0))
1802 {
1803 queue_interval = 0;
1804 receiving_message = FALSE;
1805 called_as = US"-runq";
1806 }
1807
1808/* If the program is called as "newaliases" treat it as equivalent to
1809"exim -bi"; this is a sendmail convention. */
1810
1811if ((namelen == 10 && Ustrcmp(argv[0], "newaliases") == 0) ||
1812 (namelen > 10 && Ustrncmp(argv[0] + namelen - 11, "/newaliases", 11) == 0))
1813 {
1814 bi_option = TRUE;
1815 receiving_message = FALSE;
1816 called_as = US"-newaliases";
1817 }
1818
1819/* Save the original effective uid for a couple of uses later. It should
1820normally be root, but in some esoteric environments it may not be. */
1821
1822original_euid = geteuid();
1823
1824/* Get the real uid and gid. If the caller is root, force the effective uid/gid
1825to be the same as the real ones. This makes a difference only if Exim is setuid
1826(or setgid) to something other than root, which could be the case in some
1827special configurations. */
1828
1829real_uid = getuid();
1830real_gid = getgid();
1831
1832if (real_uid == root_uid)
1833 {
1670ef10
PP
1834 rv = setgid(real_gid);
1835 if (rv)
1836 {
1837 fprintf(stderr, "exim: setgid(%ld) failed: %s\n",
1838 (long int)real_gid, strerror(errno));
1839 exit(EXIT_FAILURE);
1840 }
1841 rv = setuid(real_uid);
1842 if (rv)
1843 {
1844 fprintf(stderr, "exim: setuid(%ld) failed: %s\n",
1845 (long int)real_uid, strerror(errno));
1846 exit(EXIT_FAILURE);
1847 }
059ec3d9
PH
1848 }
1849
1850/* If neither the original real uid nor the original euid was root, Exim is
1851running in an unprivileged state. */
1852
1853unprivileged = (real_uid != root_uid && original_euid != root_uid);
1854
059ec3d9
PH
1855/* Scan the program's arguments. Some can be dealt with right away; others are
1856simply recorded for checking and handling afterwards. Do a high-level switch
1857on the second character (the one after '-'), to save some effort. */
1858
1859for (i = 1; i < argc; i++)
1860 {
1861 BOOL badarg = FALSE;
1862 uschar *arg = argv[i];
1863 uschar *argrest;
1864 int switchchar;
1865
1866 /* An argument not starting with '-' is the start of a recipients list;
1867 break out of the options-scanning loop. */
1868
1869 if (arg[0] != '-')
1870 {
1871 recipients_arg = i;
1872 break;
1873 }
1874
1875 /* An option consistion of -- terminates the options */
1876
1877 if (Ustrcmp(arg, "--") == 0)
1878 {
1879 recipients_arg = i + 1;
1880 break;
1881 }
1882
1883 /* Handle flagged options */
1884
1885 switchchar = arg[1];
1886 argrest = arg+2;
1887
1888 /* Make all -ex options synonymous with -oex arguments, since that
1889 is assumed by various callers. Also make -qR options synonymous with -R
1890 options, as that seems to be required as well. Allow for -qqR too, and
1891 the same for -S options. */
1892
1893 if (Ustrncmp(arg+1, "oe", 2) == 0 ||
1894 Ustrncmp(arg+1, "qR", 2) == 0 ||
1895 Ustrncmp(arg+1, "qS", 2) == 0)
1896 {
1897 switchchar = arg[2];
1898 argrest++;
1899 }
1900 else if (Ustrncmp(arg+1, "qqR", 3) == 0 || Ustrncmp(arg+1, "qqS", 3) == 0)
1901 {
1902 switchchar = arg[3];
1903 argrest += 2;
1904 queue_2stage = TRUE;
1905 }
1906
1907 /* Make -r synonymous with -f, since it is a documented alias */
1908
1909 else if (arg[1] == 'r') switchchar = 'f';
1910
1911 /* Make -ov synonymous with -v */
1912
1913 else if (Ustrcmp(arg, "-ov") == 0)
1914 {
1915 switchchar = 'v';
1916 argrest++;
1917 }
1918
4b2241d2
PP
1919 /* deal with --option_aliases */
1920 else if (switchchar == '-')
1921 {
1922 if (Ustrcmp(argrest, "help") == 0)
1923 {
1924 usage_wanted = TRUE;
1925 break;
1926 }
1927 else if (Ustrcmp(argrest, "version") == 0)
1928 {
1929 switchchar = 'b';
73a46702 1930 argrest = US"V";
4b2241d2
PP
1931 }
1932 }
1933
059ec3d9
PH
1934 /* High-level switch on active initial letter */
1935
1936 switch(switchchar)
1937 {
a3fb9793
PP
1938
1939 /* sendmail uses -Ac and -Am to control which .cf file is used;
1940 we ignore them. */
1941 case 'A':
1942 if (*argrest == '\0') { badarg = TRUE; break; }
1943 else
1944 {
1945 BOOL ignore = FALSE;
1946 switch (*argrest)
1947 {
1948 case 'c':
1949 case 'm':
1950 if (*(argrest + 1) == '\0')
1951 ignore = TRUE;
1952 break;
1953 }
1954 if (!ignore) { badarg = TRUE; break; }
1955 }
1956 break;
1957
059ec3d9
PH
1958 /* -Btype is a sendmail option for 7bit/8bit setting. Exim is 8-bit clean
1959 so has no need of it. */
1960
1961 case 'B':
1962 if (*argrest == 0) i++; /* Skip over the type */
1963 break;
1964
1965
1966 case 'b':
1967 receiving_message = FALSE; /* Reset TRUE for -bm, -bS, -bs below */
1968
1969 /* -bd: Run in daemon mode, awaiting SMTP connections.
1970 -bdf: Ditto, but in the foreground.
1971 */
1972
1973 if (*argrest == 'd')
1974 {
1975 daemon_listen = TRUE;
1976 if (*(++argrest) == 'f') background_daemon = FALSE;
1977 else if (*argrest != 0) { badarg = TRUE; break; }
1978 }
1979
328895cc
PH
1980 /* -be: Run in expansion test mode
1981 -bem: Ditto, but read a message from a file first
1982 */
059ec3d9
PH
1983
1984 else if (*argrest == 'e')
328895cc 1985 {
059ec3d9 1986 expansion_test = checking = TRUE;
328895cc
PH
1987 if (argrest[1] == 'm')
1988 {
1989 if (++i >= argc) { badarg = TRUE; break; }
1990 expansion_test_message = argv[i];
1991 argrest++;
1992 }
1993 if (argrest[1] != 0) { badarg = TRUE; break; }
1994 }
059ec3d9 1995
f05da2e8
PH
1996 /* -bF: Run system filter test */
1997
1998 else if (*argrest == 'F')
1999 {
34e86e20 2000 filter_test |= checking = FTEST_SYSTEM;
f05da2e8
PH
2001 if (*(++argrest) != 0) { badarg = TRUE; break; }
2002 if (++i < argc) filter_test_sfile = argv[i]; else
2003 {
2004 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2005 exit(EXIT_FAILURE);
2006 }
2007 }
2008
2009 /* -bf: Run user filter test
059ec3d9
PH
2010 -bfd: Set domain for filter testing
2011 -bfl: Set local part for filter testing
2012 -bfp: Set prefix for filter testing
2013 -bfs: Set suffix for filter testing
2014 */
2015
f05da2e8 2016 else if (*argrest == 'f')
059ec3d9 2017 {
f05da2e8 2018 if (*(++argrest) == 0)
059ec3d9 2019 {
34e86e20 2020 filter_test |= checking = FTEST_USER;
f05da2e8 2021 if (++i < argc) filter_test_ufile = argv[i]; else
059ec3d9
PH
2022 {
2023 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
2024 exit(EXIT_FAILURE);
2025 }
2026 }
2027 else
2028 {
2029 if (++i >= argc)
2030 {
2031 fprintf(stderr, "exim: string expected after %s\n", arg);
2032 exit(EXIT_FAILURE);
2033 }
2034 if (Ustrcmp(argrest, "d") == 0) ftest_domain = argv[i];
2035 else if (Ustrcmp(argrest, "l") == 0) ftest_localpart = argv[i];
2036 else if (Ustrcmp(argrest, "p") == 0) ftest_prefix = argv[i];
2037 else if (Ustrcmp(argrest, "s") == 0) ftest_suffix = argv[i];
2038 else { badarg = TRUE; break; }
2039 }
2040 }
2041
2042 /* -bh: Host checking - an IP address must follow. */
2043
2044 else if (Ustrcmp(argrest, "h") == 0 || Ustrcmp(argrest, "hc") == 0)
2045 {
2046 if (++i >= argc) { badarg = TRUE; break; }
2047 sender_host_address = argv[i];
2048 host_checking = checking = log_testing_mode = TRUE;
2049 host_checking_callout = argrest[1] == 'c';
2050 }
2051
2052 /* -bi: This option is used by sendmail to initialize *the* alias file,
2053 though it has the -oA option to specify a different file. Exim has no
2054 concept of *the* alias file, but since Sun's YP make script calls
2055 sendmail this way, some support must be provided. */
2056
2057 else if (Ustrcmp(argrest, "i") == 0) bi_option = TRUE;
2058
98a90c36
PP
2059 /* -bI: provide information, of the type to follow after a colon.
2060 This is an Exim flag. */
2061
2062 else if (argrest[0] == 'I' && Ustrlen(argrest) >= 2 && argrest[1] == ':')
2063 {
2064 uschar *p = &argrest[2];
2065 info_flag = CMDINFO_HELP;
2066 if (Ustrlen(p))
2067 {
2068 if (strcmpic(p, CUS"sieve") == 0)
2069 {
2070 info_flag = CMDINFO_SIEVE;
2071 info_stdout = TRUE;
2072 }
36a3ae5f
PP
2073 else if (strcmpic(p, CUS"dscp") == 0)
2074 {
2075 info_flag = CMDINFO_DSCP;
2076 info_stdout = TRUE;
2077 }
98a90c36
PP
2078 else if (strcmpic(p, CUS"help") == 0)
2079 {
2080 info_stdout = TRUE;
2081 }
2082 }
2083 }
2084
059ec3d9
PH
2085 /* -bm: Accept and deliver message - the default option. Reinstate
2086 receiving_message, which got turned off for all -b options. */
2087
2088 else if (Ustrcmp(argrest, "m") == 0) receiving_message = TRUE;
2089
8544e77a
PP
2090 /* -bmalware: test the filename given for malware */
2091
2092 else if (Ustrcmp(argrest, "malware") == 0)
2093 {
2094 if (++i >= argc) { badarg = TRUE; break; }
34e86e20 2095 checking = TRUE;
8544e77a
PP
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 {
bf3c2c6b
HSHR
2158 /* -bP config: we need to setup here, because later,
2159 * when list_options is checked, the config is read already */
2160 if (argv[i+1] && Ustrcmp(argv[i+1], "config") == 0)
2161 {
2162 list_config = TRUE;
2163 readconf_save_config(version_string);
2164 }
2165 else
2166 {
2167 list_options = TRUE;
2168 debug_selector |= D_v;
2169 debug_file = stderr;
2170 }
059ec3d9
PH
2171 }
2172
2173 /* -brt: Test retry configuration lookup */
2174
2175 else if (Ustrcmp(argrest, "rt") == 0)
2176 {
34e86e20 2177 checking = TRUE;
059ec3d9
PH
2178 test_retry_arg = i + 1;
2179 goto END_ARG;
2180 }
2181
2182 /* -brw: Test rewrite configuration */
2183
2184 else if (Ustrcmp(argrest, "rw") == 0)
2185 {
34e86e20 2186 checking = TRUE;
059ec3d9
PH
2187 test_rewrite_arg = i + 1;
2188 goto END_ARG;
2189 }
2190
2191 /* -bS: Read SMTP commands on standard input, but produce no replies -
2192 all errors are reported by sending messages. */
2193
2194 else if (Ustrcmp(argrest, "S") == 0)
2195 smtp_input = smtp_batched_input = receiving_message = TRUE;
2196
2197 /* -bs: Read SMTP commands on standard input and produce SMTP replies
2198 on standard output. */
2199
2200 else if (Ustrcmp(argrest, "s") == 0) smtp_input = receiving_message = TRUE;
2201
2202 /* -bt: address testing mode */
2203
2204 else if (Ustrcmp(argrest, "t") == 0)
2205 address_test_mode = checking = log_testing_mode = TRUE;
2206
2207 /* -bv: verify addresses */
2208
2209 else if (Ustrcmp(argrest, "v") == 0)
2210 verify_address_mode = checking = log_testing_mode = TRUE;
2211
2212 /* -bvs: verify sender addresses */
2213
2214 else if (Ustrcmp(argrest, "vs") == 0)
2215 {
2216 verify_address_mode = checking = log_testing_mode = TRUE;
2217 verify_as_sender = TRUE;
2218 }
2219
2220 /* -bV: Print version string and support details */
2221
2222 else if (Ustrcmp(argrest, "V") == 0)
2223 {
2224 printf("Exim version %s #%s built %s\n", version_string,
2225 version_cnumber, version_date);
2226 printf("%s\n", CS version_copyright);
2227 version_printed = TRUE;
2228 show_whats_supported(stdout);
b25c9675 2229 log_testing_mode = TRUE;
059ec3d9
PH
2230 }
2231
9ee44efb
PP
2232 /* -bw: inetd wait mode, accept a listening socket as stdin */
2233
2234 else if (*argrest == 'w')
2235 {
2236 inetd_wait_mode = TRUE;
2237 background_daemon = FALSE;
2238 daemon_listen = TRUE;
2239 if (*(++argrest) != '\0')
2240 {
2241 inetd_wait_timeout = readconf_readtime(argrest, 0, FALSE);
2242 if (inetd_wait_timeout <= 0)
2243 {
2244 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
2245 exit(EXIT_FAILURE);
2246 }
2247 }
2248 }
2249
059ec3d9
PH
2250 else badarg = TRUE;
2251 break;
2252
2253
2254 /* -C: change configuration file list; ignore if it isn't really
2255 a change! Enforce a prefix check if required. */
2256
2257 case 'C':
2258 if (*argrest == 0)
2259 {
2260 if(++i < argc) argrest = argv[i]; else
2261 { badarg = TRUE; break; }
2262 }
2263 if (Ustrcmp(config_main_filelist, argrest) != 0)
2264 {
2265 #ifdef ALT_CONFIG_PREFIX
2266 int sep = 0;
2267 int len = Ustrlen(ALT_CONFIG_PREFIX);
2268 uschar *list = argrest;
2269 uschar *filename;
2270 while((filename = string_nextinlist(&list, &sep, big_buffer,
2271 big_buffer_size)) != NULL)
2272 {
2273 if ((Ustrlen(filename) < len ||
2274 Ustrncmp(filename, ALT_CONFIG_PREFIX, len) != 0 ||
2275 Ustrstr(filename, "/../") != NULL) &&
2276 (Ustrcmp(filename, "/dev/null") != 0 || real_uid != root_uid))
2277 {
2278 fprintf(stderr, "-C Permission denied\n");
2279 exit(EXIT_FAILURE);
2280 }
2281 }
2282 #endif
261dc43e
DW
2283 if (real_uid != root_uid)
2284 {
90b6341f 2285 #ifdef TRUSTED_CONFIG_LIST
261dc43e 2286
90b6341f
DW
2287 if (real_uid != exim_uid
2288 #ifdef CONFIGURE_OWNER
2289 && real_uid != config_uid
2290 #endif
2291 )
261dc43e
DW
2292 trusted_config = FALSE;
2293 else
2294 {
90b6341f 2295 FILE *trust_list = Ufopen(TRUSTED_CONFIG_LIST, "rb");
261dc43e
DW
2296 if (trust_list)
2297 {
2298 struct stat statbuf;
2299
2300 if (fstat(fileno(trust_list), &statbuf) != 0 ||
2301 (statbuf.st_uid != root_uid /* owner not root */
2302 #ifdef CONFIGURE_OWNER
2303 && statbuf.st_uid != config_uid /* owner not the special one */
2304 #endif
2305 ) || /* or */
2306 (statbuf.st_gid != root_gid /* group not root */
2307 #ifdef CONFIGURE_GROUP
2308 && statbuf.st_gid != config_gid /* group not the special one */
2309 #endif
2310 && (statbuf.st_mode & 020) != 0 /* group writeable */
2311 ) || /* or */
2312 (statbuf.st_mode & 2) != 0) /* world writeable */
2313 {
2314 trusted_config = FALSE;
2315 fclose(trust_list);
2316 }
2317 else
2318 {
2319 /* Well, the trust list at least is up to scratch... */
2320 void *reset_point = store_get(0);
90b6341f
DW
2321 uschar *trusted_configs[32];
2322 int nr_configs = 0;
261dc43e
DW
2323 int i = 0;
2324
2325 while (Ufgets(big_buffer, big_buffer_size, trust_list))
2326 {
2327 uschar *start = big_buffer, *nl;
2328 while (*start && isspace(*start))
2329 start++;
1e83d68b 2330 if (*start != '/')
261dc43e
DW
2331 continue;
2332 nl = Ustrchr(start, '\n');
2333 if (nl)
2334 *nl = 0;
90b6341f
DW
2335 trusted_configs[nr_configs++] = string_copy(start);
2336 if (nr_configs == 32)
261dc43e
DW
2337 break;
2338 }
2339 fclose(trust_list);
2340
90b6341f 2341 if (nr_configs)
261dc43e
DW
2342 {
2343 int sep = 0;
55414b25 2344 const uschar *list = argrest;
261dc43e
DW
2345 uschar *filename;
2346 while (trusted_config && (filename = string_nextinlist(&list,
2347 &sep, big_buffer, big_buffer_size)) != NULL)
2348 {
90b6341f 2349 for (i=0; i < nr_configs; i++)
261dc43e 2350 {
90b6341f 2351 if (Ustrcmp(filename, trusted_configs[i]) == 0)
261dc43e
DW
2352 break;
2353 }
90b6341f 2354 if (i == nr_configs)
261dc43e
DW
2355 {
2356 trusted_config = FALSE;
2357 break;
2358 }
2359 }
1e83d68b 2360 store_reset(reset_point);
261dc43e
DW
2361 }
2362 else
2363 {
2364 /* No valid prefixes found in trust_list file. */
2365 trusted_config = FALSE;
2366 }
2367 }
2368 }
2369 else
2370 {
2371 /* Could not open trust_list file. */
2372 trusted_config = FALSE;
2373 }
2374 }
2375 #else
2376 /* Not root; don't trust config */
2377 trusted_config = FALSE;
2378 #endif
2379 }
059ec3d9
PH
2380
2381 config_main_filelist = argrest;
2382 config_changed = TRUE;
2383 }
2384 break;
2385
2386
2387 /* -D: set up a macro definition */
2388
2389 case 'D':
2390 #ifdef DISABLE_D_OPTION
2391 fprintf(stderr, "exim: -D is not available in this Exim binary\n");
2392 exit(EXIT_FAILURE);
2393 #else
2394 {
2395 int ptr = 0;
2396 macro_item *mlast = NULL;
2397 macro_item *m;
2398 uschar name[24];
2399 uschar *s = argrest;
2400
2401 while (isspace(*s)) s++;
2402
2403 if (*s < 'A' || *s > 'Z')
2404 {
2405 fprintf(stderr, "exim: macro name set by -D must start with "
2406 "an upper case letter\n");
2407 exit(EXIT_FAILURE);
2408 }
2409
2410 while (isalnum(*s) || *s == '_')
2411 {
2412 if (ptr < sizeof(name)-1) name[ptr++] = *s;
2413 s++;
2414 }
2415 name[ptr] = 0;
2416 if (ptr == 0) { badarg = TRUE; break; }
2417 while (isspace(*s)) s++;
2418 if (*s != 0)
2419 {
2420 if (*s++ != '=') { badarg = TRUE; break; }
2421 while (isspace(*s)) s++;
2422 }
2423
2424 for (m = macros; m != NULL; m = m->next)
2425 {
2426 if (Ustrcmp(m->name, name) == 0)
2427 {
2428 fprintf(stderr, "exim: duplicated -D in command line\n");
2429 exit(EXIT_FAILURE);
2430 }
2431 mlast = m;
2432 }
2433
2434 m = store_get(sizeof(macro_item) + Ustrlen(name));
2435 m->next = NULL;
2436 m->command_line = TRUE;
2437 if (mlast == NULL) macros = m; else mlast->next = m;
2438 Ustrcpy(m->name, name);
2439 m->replacement = string_copy(s);
2440
2441 if (clmacro_count >= MAX_CLMACROS)
2442 {
2443 fprintf(stderr, "exim: too many -D options on command line\n");
2444 exit(EXIT_FAILURE);
2445 }
2446 clmacros[clmacro_count++] = string_sprintf("-D%s=%s", m->name,
2447 m->replacement);
2448 }
2449 #endif
2450 break;
2451
2452 /* -d: Set debug level (see also -v below) or set the drop_cr option.
8e669ac1 2453 The latter is now a no-op, retained for compatibility only. If -dd is used,
3d235903 2454 debugging subprocesses of the daemon is disabled. */
059ec3d9
PH
2455
2456 case 'd':
2457 if (Ustrcmp(argrest, "ropcr") == 0)
2458 {
2459 /* drop_cr = TRUE; */
2460 }
2461
2462 /* Use an intermediate variable so that we don't set debugging while
2463 decoding the debugging bits. */
2464
2465 else
2466 {
2467 unsigned int selector = D_default;
2468 debug_selector = 0;
2469 debug_file = NULL;
3d235903
PH
2470 if (*argrest == 'd')
2471 {
2472 debug_daemon = TRUE;
2473 argrest++;
2474 }
059ec3d9 2475 if (*argrest != 0)
6c6d6e48
TF
2476 decode_bits(&selector, 1, debug_notall, argrest,
2477 debug_options, debug_options_count, US"debug", 0);
059ec3d9
PH
2478 debug_selector = selector;
2479 }
2480 break;
2481
2482
2483 /* -E: This is a local error message. This option is not intended for
2484 external use at all, but is not restricted to trusted callers because it
2485 does no harm (just suppresses certain error messages) and if Exim is run
2486 not setuid root it won't always be trusted when it generates error
2487 messages using this option. If there is a message id following -E, point
2488 message_reference at it, for logging. */
2489
2490 case 'E':
2491 local_error_message = TRUE;
2492 if (mac_ismsgid(argrest)) message_reference = argrest;
2493 break;
2494
2495
2496 /* -ex: The vacation program calls sendmail with the undocumented "-eq"
2497 option, so it looks as if historically the -oex options are also callable
2498 without the leading -o. So we have to accept them. Before the switch,
2499 anything starting -oe has been converted to -e. Exim does not support all
2500 of the sendmail error options. */
2501
2502 case 'e':
2503 if (Ustrcmp(argrest, "e") == 0)
2504 {
2505 arg_error_handling = ERRORS_SENDER;
2506 errors_sender_rc = EXIT_SUCCESS;
2507 }
2508 else if (Ustrcmp(argrest, "m") == 0) arg_error_handling = ERRORS_SENDER;
2509 else if (Ustrcmp(argrest, "p") == 0) arg_error_handling = ERRORS_STDERR;
2510 else if (Ustrcmp(argrest, "q") == 0) arg_error_handling = ERRORS_STDERR;
2511 else if (Ustrcmp(argrest, "w") == 0) arg_error_handling = ERRORS_SENDER;
2512 else badarg = TRUE;
2513 break;
2514
2515
2516 /* -F: Set sender's full name, used instead of the gecos entry from
2517 the password file. Since users can usually alter their gecos entries,
2518 there's no security involved in using this instead. The data can follow
2519 the -F or be in the next argument. */
2520
2521 case 'F':
2522 if (*argrest == 0)
2523 {
2524 if(++i < argc) argrest = argv[i]; else
2525 { badarg = TRUE; break; }
2526 }
2527 originator_name = argrest;
2fe1a124 2528 sender_name_forced = TRUE;
059ec3d9
PH
2529 break;
2530
2531
2532 /* -f: Set sender's address - this value is only actually used if Exim is
2533 run by a trusted user, or if untrusted_set_sender is set and matches the
2534 address, except that the null address can always be set by any user. The
2535 test for this happens later, when the value given here is ignored when not
2536 permitted. For an untrusted user, the actual sender is still put in Sender:
2537 if it doesn't match the From: header (unless no_local_from_check is set).
2538 The data can follow the -f or be in the next argument. The -r switch is an
2539 obsolete form of -f but since there appear to be programs out there that
2540 use anything that sendmail has ever supported, better accept it - the
2541 synonymizing is done before the switch above.
2542
2543 At this stage, we must allow domain literal addresses, because we don't
2544 know what the setting of allow_domain_literals is yet. Ditto for trailing
2545 dots and strip_trailing_dot. */
2546
2547 case 'f':
2548 {
250b6871 2549 int dummy_start, dummy_end;
059ec3d9
PH
2550 uschar *errmess;
2551 if (*argrest == 0)
2552 {
2553 if (i+1 < argc) argrest = argv[++i]; else
2554 { badarg = TRUE; break; }
2555 }
2556 if (*argrest == 0)
059ec3d9 2557 sender_address = string_sprintf(""); /* Ensure writeable memory */
059ec3d9
PH
2558 else
2559 {
2560 uschar *temp = argrest + Ustrlen(argrest) - 1;
2561 while (temp >= argrest && isspace(*temp)) temp--;
2562 if (temp >= argrest && *temp == '.') f_end_dot = TRUE;
2563 allow_domain_literals = TRUE;
2564 strip_trailing_dot = TRUE;
8c5d388a 2565#ifdef SUPPORT_I18N
250b6871
JH
2566 allow_utf8_domains = TRUE;
2567#endif
2568 sender_address = parse_extract_address(argrest, &errmess,
2569 &dummy_start, &dummy_end, &sender_address_domain, TRUE);
8c5d388a 2570#ifdef SUPPORT_I18N
250b6871
JH
2571 message_smtputf8 = string_is_utf8(sender_address);
2572 allow_utf8_domains = FALSE;
2573#endif
059ec3d9
PH
2574 allow_domain_literals = FALSE;
2575 strip_trailing_dot = FALSE;
2576 if (sender_address == NULL)
2577 {
2578 fprintf(stderr, "exim: bad -f address \"%s\": %s\n", argrest, errmess);
2579 return EXIT_FAILURE;
2580 }
2581 }
2582 sender_address_forced = TRUE;
2583 }
2584 break;
2585
a3fb9793 2586 /* -G: sendmail invocation to specify that it's a gateway submission and
f4ee74ac
PP
2587 sendmail may complain about problems instead of fixing them.
2588 We make it equivalent to an ACL "control = suppress_local_fixups" and do
2589 not at this time complain about problems. */
059ec3d9
PH
2590
2591 case 'G':
f4ee74ac 2592 flag_G = TRUE;
059ec3d9
PH
2593 break;
2594
2595 /* -h: Set the hop count for an incoming message. Exim does not currently
2596 support this; it always computes it by counting the Received: headers.
2597 To put it in will require a change to the spool header file format. */
2598
2599 case 'h':
2600 if (*argrest == 0)
2601 {
2602 if(++i < argc) argrest = argv[i]; else
2603 { badarg = TRUE; break; }
2604 }
2605 if (!isdigit(*argrest)) badarg = TRUE;
2606 break;
2607
2608
2609 /* -i: Set flag so dot doesn't end non-SMTP input (same as -oi, seems
2610 not to be documented for sendmail but mailx (at least) uses it) */
2611
2612 case 'i':
2613 if (*argrest == 0) dot_ends = FALSE; else badarg = TRUE;
2614 break;
2615
2616
a3fb9793
PP
2617 /* -L: set the identifier used for syslog; equivalent to setting
2618 syslog_processname in the config file, but needs to be an admin option. */
2619
2620 case 'L':
2621 if (*argrest == '\0')
2622 {
2623 if(++i < argc) argrest = argv[i]; else
2624 { badarg = TRUE; break; }
2625 }
2626 sz = Ustrlen(argrest);
2627 if (sz > 32)
2628 {
2629 fprintf(stderr, "exim: the -L syslog name is too long: \"%s\"\n", argrest);
2630 return EXIT_FAILURE;
2631 }
2632 if (sz < 1)
2633 {
2634 fprintf(stderr, "exim: the -L syslog name is too short\n");
2635 return EXIT_FAILURE;
2636 }
2637 cmdline_syslog_name = argrest;
2638 break;
2639
059ec3d9
PH
2640 case 'M':
2641 receiving_message = FALSE;
2642
2643 /* -MC: continue delivery of another message via an existing open
2644 file descriptor. This option is used for an internal call by the
2645 smtp transport when there is a pending message waiting to go to an
2646 address to which it has got a connection. Five subsequent arguments are
2647 required: transport name, host name, IP address, sequence number, and
2648 message_id. Transports may decline to create new processes if the sequence
2649 number gets too big. The channel is stdin. This (-MC) must be the last
2650 argument. There's a subsequent check that the real-uid is privileged.
2651
2652 If we are running in the test harness. delay for a bit, to let the process
2653 that set this one up complete. This makes for repeatability of the logging,
2654 etc. output. */
2655
2656 if (Ustrcmp(argrest, "C") == 0)
2657 {
41c7c167
PH
2658 union sockaddr_46 interface_sock;
2659 EXIM_SOCKLEN_T size = sizeof(interface_sock);
2660
059ec3d9
PH
2661 if (argc != i + 6)
2662 {
2663 fprintf(stderr, "exim: too many or too few arguments after -MC\n");
2664 return EXIT_FAILURE;
2665 }
2666
2667 if (msg_action_arg >= 0)
2668 {
2669 fprintf(stderr, "exim: incompatible arguments\n");
2670 return EXIT_FAILURE;
2671 }
2672
2673 continue_transport = argv[++i];
2674 continue_hostname = argv[++i];
2675 continue_host_address = argv[++i];
2676 continue_sequence = Uatoi(argv[++i]);
2677 msg_action = MSG_DELIVER;
2678 msg_action_arg = ++i;
2679 forced_delivery = TRUE;
2680 queue_run_pid = passed_qr_pid;
2681 queue_run_pipe = passed_qr_pipe;
2682
2683 if (!mac_ismsgid(argv[i]))
2684 {
2685 fprintf(stderr, "exim: malformed message id %s after -MC option\n",
2686 argv[i]);
2687 return EXIT_FAILURE;
2688 }
2689
41c7c167
PH
2690 /* Set up $sending_ip_address and $sending_port */
2691
2692 if (getsockname(fileno(stdin), (struct sockaddr *)(&interface_sock),
2693 &size) == 0)
2694 sending_ip_address = host_ntoa(-1, &interface_sock, NULL,
2695 &sending_port);
2696 else
2697 {
2698 fprintf(stderr, "exim: getsockname() failed after -MC option: %s\n",
2699 strerror(errno));
2700 return EXIT_FAILURE;
2701 }
2702
059ec3d9
PH
2703 if (running_in_test_harness) millisleep(500);
2704 break;
2705 }
2706
2707 /* -MCA: set the smtp_authenticated flag; this is useful only when it
2708 precedes -MC (see above). The flag indicates that the host to which
2709 Exim is connected has accepted an AUTH sequence. */
2710
2711 else if (Ustrcmp(argrest, "CA") == 0)
2712 {
2713 smtp_authenticated = TRUE;
2714 break;
2715 }
2716
6c1c3d1d
WB
2717 /* -MCD: set the smtp_use_dsn flag; this indicates that the host
2718 that exim is connected to supports the esmtp extension DSN */
28b3821f 2719
45500060 2720 else if (Ustrcmp(argrest, "CD") == 0)
6c1c3d1d
WB
2721 {
2722 smtp_use_dsn = TRUE;
2723 break;
2724 }
6c1c3d1d 2725
28b3821f
JH
2726 /* -MCG: set the queue name, to a non-default value
2727
2728 else if (Ustrcmp(argrest, "CG") == 0)
2729 {
2730 if (++i < argc) queue_name = string_copy(argv[i]);
2731 else badarg = TRUE;
2732 break;
2733 }
2734
059ec3d9
PH
2735 /* -MCP: set the smtp_use_pipelining flag; this is useful only when
2736 it preceded -MC (see above) */
2737
2738 else if (Ustrcmp(argrest, "CP") == 0)
2739 {
2740 smtp_use_pipelining = TRUE;
2741 break;
2742 }
2743
2744 /* -MCQ: pass on the pid of the queue-running process that started
2745 this chain of deliveries and the fd of its synchronizing pipe; this
2746 is useful only when it precedes -MC (see above) */
2747
2748 else if (Ustrcmp(argrest, "CQ") == 0)
2749 {
28b3821f 2750 if (++i < argc) passed_qr_pid = (pid_t)(Uatol(argv[i]));
059ec3d9 2751 else badarg = TRUE;
28b3821f 2752 if (++i < argc) passed_qr_pipe = (int)(Uatol(argv[i]));
059ec3d9
PH
2753 else badarg = TRUE;
2754 break;
2755 }
2756
2757 /* -MCS: set the smtp_use_size flag; this is useful only when it
2758 precedes -MC (see above) */
2759
2760 else if (Ustrcmp(argrest, "CS") == 0)
2761 {
2762 smtp_use_size = TRUE;
2763 break;
2764 }
2765
2766 /* -MCT: set the tls_offered flag; this is useful only when it
2767 precedes -MC (see above). The flag indicates that the host to which
2768 Exim is connected has offered TLS support. */
2769
2770 #ifdef SUPPORT_TLS
2771 else if (Ustrcmp(argrest, "CT") == 0)
2772 {
2773 tls_offered = TRUE;
2774 break;
2775 }
2776 #endif
2777
2778 /* -M[x]: various operations on the following list of message ids:
2779 -M deliver the messages, ignoring next retry times and thawing
2780 -Mc deliver the messages, checking next retry times, no thawing
2781 -Mf freeze the messages
2782 -Mg give up on the messages
2783 -Mt thaw the messages
2784 -Mrm remove the messages
2785 In the above cases, this must be the last option. There are also the
2786 following options which are followed by a single message id, and which
2787 act on that message. Some of them use the "recipient" addresses as well.
2788 -Mar add recipient(s)
2789 -Mmad mark all recipients delivered
2790 -Mmd mark recipients(s) delivered
2791 -Mes edit sender
0ef732d9 2792 -Mset load a message for use with -be
059ec3d9 2793 -Mvb show body
a96603a0 2794 -Mvc show copy (of whole message, in RFC 2822 format)
059ec3d9
PH
2795 -Mvh show header
2796 -Mvl show log
2797 */
2798
2799 else if (*argrest == 0)
2800 {
2801 msg_action = MSG_DELIVER;
2802 forced_delivery = deliver_force_thaw = TRUE;
2803 }
2804 else if (Ustrcmp(argrest, "ar") == 0)
2805 {
2806 msg_action = MSG_ADD_RECIPIENT;
2807 one_msg_action = TRUE;
2808 }
2809 else if (Ustrcmp(argrest, "c") == 0) msg_action = MSG_DELIVER;
2810 else if (Ustrcmp(argrest, "es") == 0)
2811 {
2812 msg_action = MSG_EDIT_SENDER;
2813 one_msg_action = TRUE;
2814 }
2815 else if (Ustrcmp(argrest, "f") == 0) msg_action = MSG_FREEZE;
2816 else if (Ustrcmp(argrest, "g") == 0)
2817 {
2818 msg_action = MSG_DELIVER;
2819 deliver_give_up = TRUE;
2820 }
2821 else if (Ustrcmp(argrest, "mad") == 0)
2822 {
2823 msg_action = MSG_MARK_ALL_DELIVERED;
2824 }
2825 else if (Ustrcmp(argrest, "md") == 0)
2826 {
2827 msg_action = MSG_MARK_DELIVERED;
2828 one_msg_action = TRUE;
2829 }
2830 else if (Ustrcmp(argrest, "rm") == 0) msg_action = MSG_REMOVE;
0ef732d9
PH
2831 else if (Ustrcmp(argrest, "set") == 0)
2832 {
2833 msg_action = MSG_LOAD;
2834 one_msg_action = TRUE;
2835 }
059ec3d9
PH
2836 else if (Ustrcmp(argrest, "t") == 0) msg_action = MSG_THAW;
2837 else if (Ustrcmp(argrest, "vb") == 0)
2838 {
2839 msg_action = MSG_SHOW_BODY;
2840 one_msg_action = TRUE;
2841 }
a96603a0
PH
2842 else if (Ustrcmp(argrest, "vc") == 0)
2843 {
2844 msg_action = MSG_SHOW_COPY;
2845 one_msg_action = TRUE;
2846 }
059ec3d9
PH
2847 else if (Ustrcmp(argrest, "vh") == 0)
2848 {
2849 msg_action = MSG_SHOW_HEADER;
2850 one_msg_action = TRUE;
2851 }
2852 else if (Ustrcmp(argrest, "vl") == 0)
2853 {
2854 msg_action = MSG_SHOW_LOG;
2855 one_msg_action = TRUE;
2856 }
2857 else { badarg = TRUE; break; }
2858
2859 /* All the -Mxx options require at least one message id. */
2860
2861 msg_action_arg = i + 1;
2862 if (msg_action_arg >= argc)
2863 {
2864 fprintf(stderr, "exim: no message ids given after %s option\n", arg);
2865 return EXIT_FAILURE;
2866 }
2867
2868 /* Some require only message ids to follow */
2869
2870 if (!one_msg_action)
2871 {
2872 int j;
2873 for (j = msg_action_arg; j < argc; j++) if (!mac_ismsgid(argv[j]))
2874 {
2875 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2876 argv[j], arg);
2877 return EXIT_FAILURE;
2878 }
2879 goto END_ARG; /* Remaining args are ids */
2880 }
2881
2882 /* Others require only one message id, possibly followed by addresses,
2883 which will be handled as normal arguments. */
2884
2885 else
2886 {
2887 if (!mac_ismsgid(argv[msg_action_arg]))
2888 {
2889 fprintf(stderr, "exim: malformed message id %s after %s option\n",
2890 argv[msg_action_arg], arg);
2891 return EXIT_FAILURE;
2892 }
2893 i++;
2894 }
2895 break;
2896
2897
2898 /* Some programs seem to call the -om option without the leading o;
2899 for sendmail it askes for "me too". Exim always does this. */
2900
2901 case 'm':
2902 if (*argrest != 0) badarg = TRUE;
2903 break;
2904
2905
2906 /* -N: don't do delivery - a debugging option that stops transports doing
2907 their thing. It implies debugging at the D_v level. */
2908
2909 case 'N':
2910 if (*argrest == 0)
2911 {
2912 dont_deliver = TRUE;
2913 debug_selector |= D_v;
2914 debug_file = stderr;
2915 }
2916 else badarg = TRUE;
2917 break;
2918
2919
12f69989
PP
2920 /* -n: This means "don't alias" in sendmail, apparently.
2921 For normal invocations, it has no effect.
2922 It may affect some other options. */
059ec3d9
PH
2923
2924 case 'n':
12f69989 2925 flag_n = TRUE;
059ec3d9
PH
2926 break;
2927
2928 /* -O: Just ignore it. In sendmail, apparently -O option=value means set
2929 option to the specified value. This form uses long names. We need to handle
2930 -O option=value and -Ooption=value. */
2931
2932 case 'O':
2933 if (*argrest == 0)
2934 {
2935 if (++i >= argc)
2936 {
2937 fprintf(stderr, "exim: string expected after -O\n");
2938 exit(EXIT_FAILURE);
2939 }
2940 }
2941 break;
2942
2943 case 'o':
2944
2945 /* -oA: Set an argument for the bi command (sendmail's "alternate alias
2946 file" option). */
2947
2948 if (*argrest == 'A')
2949 {
2950 alias_arg = argrest + 1;
2951 if (alias_arg[0] == 0)
2952 {
2953 if (i+1 < argc) alias_arg = argv[++i]; else
2954 {
2955 fprintf(stderr, "exim: string expected after -oA\n");
2956 exit(EXIT_FAILURE);
2957 }
2958 }
2959 }
2960
2961 /* -oB: Set a connection message max value for remote deliveries */
2962
2963 else if (*argrest == 'B')
2964 {
2965 uschar *p = argrest + 1;
2966 if (p[0] == 0)
2967 {
2968 if (i+1 < argc && isdigit((argv[i+1][0]))) p = argv[++i]; else
2969 {
2970 connection_max_messages = 1;
2971 p = NULL;
2972 }
2973 }
2974
2975 if (p != NULL)
2976 {
2977 if (!isdigit(*p))
2978 {
2979 fprintf(stderr, "exim: number expected after -oB\n");
2980 exit(EXIT_FAILURE);
2981 }
2982 connection_max_messages = Uatoi(p);
2983 }
2984 }
2985
2986 /* -odb: background delivery */
2987
2988 else if (Ustrcmp(argrest, "db") == 0)
2989 {
2990 synchronous_delivery = FALSE;
2991 arg_queue_only = FALSE;
2992 queue_only_set = TRUE;
2993 }
2994
2995 /* -odf: foreground delivery (smail-compatible option); same effect as
2996 -odi: interactive (synchronous) delivery (sendmail-compatible option)
2997 */
2998
2999 else if (Ustrcmp(argrest, "df") == 0 || Ustrcmp(argrest, "di") == 0)
3000 {
3001 synchronous_delivery = TRUE;
3002 arg_queue_only = FALSE;
3003 queue_only_set = TRUE;
3004 }
3005
3006 /* -odq: queue only */
3007
3008 else if (Ustrcmp(argrest, "dq") == 0)
3009 {
3010 synchronous_delivery = FALSE;
3011 arg_queue_only = TRUE;
3012 queue_only_set = TRUE;
3013 }
3014
3015 /* -odqs: queue SMTP only - do local deliveries and remote routing,
3016 but no remote delivery */
3017
3018 else if (Ustrcmp(argrest, "dqs") == 0)
3019 {
3020 queue_smtp = TRUE;
3021 arg_queue_only = FALSE;
3022 queue_only_set = TRUE;
3023 }
3024
3025 /* -oex: Sendmail error flags. As these are also accepted without the
3026 leading -o prefix, for compatibility with vacation and other callers,
3027 they are handled with -e above. */
3028
3029 /* -oi: Set flag so dot doesn't end non-SMTP input (same as -i)
3030 -oitrue: Another sendmail syntax for the same */
3031
3032 else if (Ustrcmp(argrest, "i") == 0 ||
3033 Ustrcmp(argrest, "itrue") == 0)
3034 dot_ends = FALSE;
3035
3036 /* -oM*: Set various characteristics for an incoming message; actually
3037 acted on for trusted callers only. */
3038
3039 else if (*argrest == 'M')
3040 {
3041 if (i+1 >= argc)
3042 {
3043 fprintf(stderr, "exim: data expected after -o%s\n", argrest);
3044 exit(EXIT_FAILURE);
3045 }
3046
3047 /* -oMa: Set sender host address */
3048
3049 if (Ustrcmp(argrest, "Ma") == 0) sender_host_address = argv[++i];
3050
3051 /* -oMaa: Set authenticator name */
3052
3053 else if (Ustrcmp(argrest, "Maa") == 0)
3054 sender_host_authenticated = argv[++i];
3055
3056 /* -oMas: setting authenticated sender */
3057
3058 else if (Ustrcmp(argrest, "Mas") == 0) authenticated_sender = argv[++i];
3059
3060 /* -oMai: setting authenticated id */
3061
3062 else if (Ustrcmp(argrest, "Mai") == 0) authenticated_id = argv[++i];
3063
3064 /* -oMi: Set incoming interface address */
3065
3066 else if (Ustrcmp(argrest, "Mi") == 0) interface_address = argv[++i];
3067
d2af03f4
HS
3068 /* -oMm: Message reference */
3069
3070 else if (Ustrcmp(argrest, "Mm") == 0)
3071 {
3072 if (!mac_ismsgid(argv[i+1]))
3073 {
3074 fprintf(stderr,"-oMm must be a valid message ID\n");
3075 exit(EXIT_FAILURE);
3076 }
3077 if (!trusted_config)
3078 {
3079 fprintf(stderr,"-oMm must be called by a trusted user/config\n");
3080 exit(EXIT_FAILURE);
3081 }
3082 message_reference = argv[++i];
3083 }
3084
059ec3d9
PH
3085 /* -oMr: Received protocol */
3086
3087 else if (Ustrcmp(argrest, "Mr") == 0) received_protocol = argv[++i];
3088
3089 /* -oMs: Set sender host name */
3090
3091 else if (Ustrcmp(argrest, "Ms") == 0) sender_host_name = argv[++i];
3092
3093 /* -oMt: Set sender ident */
3094
33d73e3b
PH
3095 else if (Ustrcmp(argrest, "Mt") == 0)
3096 {
3097 sender_ident_set = TRUE;
3098 sender_ident = argv[++i];
3099 }
059ec3d9
PH
3100
3101 /* Else a bad argument */
3102
3103 else
3104 {
3105 badarg = TRUE;
3106 break;
3107 }
3108 }
3109
3110 /* -om: Me-too flag for aliases. Exim always does this. Some programs
3111 seem to call this as -m (undocumented), so that is also accepted (see
3112 above). */
3113
3114 else if (Ustrcmp(argrest, "m") == 0) {}
3115
3116 /* -oo: An ancient flag for old-style addresses which still seems to
3117 crop up in some calls (see in SCO). */
3118
3119 else if (Ustrcmp(argrest, "o") == 0) {}
3120
3121 /* -oP <name>: set pid file path for daemon */
3122
3123 else if (Ustrcmp(argrest, "P") == 0)
3124 override_pid_file_path = argv[++i];
3125
3126 /* -or <n>: set timeout for non-SMTP acceptance
3127 -os <n>: set timeout for SMTP acceptance */
3128
3129 else if (*argrest == 'r' || *argrest == 's')
3130 {
3131 int *tp = (*argrest == 'r')?
3132 &arg_receive_timeout : &arg_smtp_receive_timeout;
3133 if (argrest[1] == 0)
3134 {
3135 if (i+1 < argc) *tp= readconf_readtime(argv[++i], 0, FALSE);
3136 }
3137 else *tp = readconf_readtime(argrest + 1, 0, FALSE);
3138 if (*tp < 0)
3139 {
3140 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3141 exit(EXIT_FAILURE);
3142 }
3143 }
3144
3145 /* -oX <list>: Override local_interfaces and/or default daemon ports */
3146
3147 else if (Ustrcmp(argrest, "X") == 0)
3148 override_local_interfaces = argv[++i];
3149
3150 /* Unknown -o argument */
3151
3152 else badarg = TRUE;
3153 break;
3154
3155
3156 /* -ps: force Perl startup; -pd force delayed Perl startup */
3157
3158 case 'p':
3159 #ifdef EXIM_PERL
3160 if (*argrest == 's' && argrest[1] == 0)
3161 {
3162 perl_start_option = 1;
3163 break;
3164 }
3165 if (*argrest == 'd' && argrest[1] == 0)
3166 {
3167 perl_start_option = -1;
3168 break;
3169 }
3170 #endif
3171
3172 /* -panythingelse is taken as the Sendmail-compatible argument -prval:sval,
3173 which sets the host protocol and host name */
3174
3175 if (*argrest == 0)
3176 {
3177 if (i+1 < argc) argrest = argv[++i]; else
3178 { badarg = TRUE; break; }
3179 }
3180
3181 if (*argrest != 0)
3182 {
3183 uschar *hn = Ustrchr(argrest, ':');
3184 if (hn == NULL)
3185 {
3186 received_protocol = argrest;
3187 }
3188 else
3189 {
3190 received_protocol = string_copyn(argrest, hn - argrest);
3191 sender_host_name = hn + 1;
3192 }
3193 }
3194 break;
3195
3196
3197 case 'q':
3198 receiving_message = FALSE;
3cc66b45
PH
3199 if (queue_interval >= 0)
3200 {
3201 fprintf(stderr, "exim: -q specified more than once\n");
3202 exit(EXIT_FAILURE);
3203 }
059ec3d9
PH
3204
3205 /* -qq...: Do queue runs in a 2-stage manner */
3206
3207 if (*argrest == 'q')
3208 {
3209 queue_2stage = TRUE;
3210 argrest++;
3211 }
3212
3213 /* -qi...: Do only first (initial) deliveries */
3214
3215 if (*argrest == 'i')
3216 {
3217 queue_run_first_delivery = TRUE;
3218 argrest++;
3219 }
3220
3221 /* -qf...: Run the queue, forcing deliveries
3222 -qff..: Ditto, forcing thawing as well */
3223
3224 if (*argrest == 'f')
3225 {
3226 queue_run_force = TRUE;
3227 if (*(++argrest) == 'f')
3228 {
3229 deliver_force_thaw = TRUE;
3230 argrest++;
3231 }
3232 }
3233
3234 /* -q[f][f]l...: Run the queue only on local deliveries */
3235
3236 if (*argrest == 'l')
3237 {
3238 queue_run_local = TRUE;
3239 argrest++;
3240 }
3241
28b3821f
JH
3242 /* -q[f][f][l][G<name>]... Run the named queue */
3243
3244 if (*argrest == 'G')
3245 {
6073ad45 3246 queue_name = string_copy(argrest+1);
28b3821f
JH
3247 do ++argrest; while (*argrest);
3248 }
3249
3250 /* -q[f][f][l][G<name>]: Run the queue, optionally forced, optionally local
3251 only, optionally named, optionally starting from a given message id. */
059ec3d9
PH
3252
3253 if (*argrest == 0 &&
3254 (i + 1 >= argc || argv[i+1][0] == '-' || mac_ismsgid(argv[i+1])))
3255 {
3256 queue_interval = 0;
3257 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3258 start_queue_run_id = argv[++i];
3259 if (i+1 < argc && mac_ismsgid(argv[i+1]))
3260 stop_queue_run_id = argv[++i];
3261 }
3262
3263 /* -q[f][f][l]<n>: Run the queue at regular intervals, optionally forced,
3264 optionally local only. */
3265
3266 else
3267 {
3268 if (*argrest != 0)
3269 queue_interval = readconf_readtime(argrest, 0, FALSE);
3270 else
3271 queue_interval = readconf_readtime(argv[++i], 0, FALSE);
3272 if (queue_interval <= 0)
3273 {
3274 fprintf(stderr, "exim: bad time value %s: abandoned\n", argv[i]);
3275 exit(EXIT_FAILURE);
3276 }
3277 }
3278 break;
3279
3280
3281 case 'R': /* Synonymous with -qR... */
3282 receiving_message = FALSE;
3283
3284 /* -Rf: As -R (below) but force all deliveries,
3285 -Rff: Ditto, but also thaw all frozen messages,
3286 -Rr: String is regex
3287 -Rrf: Regex and force
3288 -Rrff: Regex and force and thaw
3289
3290 in all cases provided there are no further characters in this
3291 argument. */
3292
3293 if (*argrest != 0)
3294 {
3295 int i;
3296 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3297 {
3298 if (Ustrcmp(argrest, rsopts[i]) == 0)
3299 {
3300 if (i != 2) queue_run_force = TRUE;
3301 if (i >= 2) deliver_selectstring_regex = TRUE;
3302 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3303 argrest += Ustrlen(rsopts[i]);
3304 }
3305 }
3306 }
3307
3308 /* -R: Set string to match in addresses for forced queue run to
3309 pick out particular messages. */
3310
3311 if (*argrest == 0)
3312 {
3313 if (i+1 < argc) deliver_selectstring = argv[++i]; else
3314 {
3315 fprintf(stderr, "exim: string expected after -R\n");
3316 exit(EXIT_FAILURE);
3317 }
3318 }
3319 else deliver_selectstring = argrest;
059ec3d9
PH
3320 break;
3321
3322
3323 /* -r: an obsolete synonym for -f (see above) */
3324
3325
3326 /* -S: Like -R but works on sender. */
3327
3328 case 'S': /* Synonymous with -qS... */
3329 receiving_message = FALSE;
3330
3331 /* -Sf: As -S (below) but force all deliveries,
3332 -Sff: Ditto, but also thaw all frozen messages,
3333 -Sr: String is regex
3334 -Srf: Regex and force
3335 -Srff: Regex and force and thaw
3336
3337 in all cases provided there are no further characters in this
3338 argument. */
3339
3340 if (*argrest != 0)
3341 {
3342 int i;
3343 for (i = 0; i < sizeof(rsopts)/sizeof(uschar *); i++)
3344 {
3345 if (Ustrcmp(argrest, rsopts[i]) == 0)
3346 {
3347 if (i != 2) queue_run_force = TRUE;
3348 if (i >= 2) deliver_selectstring_sender_regex = TRUE;
3349 if (i == 1 || i == 4) deliver_force_thaw = TRUE;
3350 argrest += Ustrlen(rsopts[i]);
3351 }
3352 }
3353 }
3354
3355 /* -S: Set string to match in addresses for forced queue run to
3356 pick out particular messages. */
3357
3358 if (*argrest == 0)
3359 {
3360 if (i+1 < argc) deliver_selectstring_sender = argv[++i]; else
3361 {
3362 fprintf(stderr, "exim: string expected after -S\n");
3363 exit(EXIT_FAILURE);
3364 }
3365 }
3366 else deliver_selectstring_sender = argrest;
059ec3d9
PH
3367 break;
3368
3369 /* -Tqt is an option that is exclusively for use by the testing suite.
3370 It is not recognized in other circumstances. It allows for the setting up
3371 of explicit "queue times" so that various warning/retry things can be
3372 tested. Otherwise variability of clock ticks etc. cause problems. */
3373
3374 case 'T':
3375 if (running_in_test_harness && Ustrcmp(argrest, "qt") == 0)
3376 fudged_queue_times = argv[++i];
3377 else badarg = TRUE;
3378 break;
3379
3380
3381 /* -t: Set flag to extract recipients from body of message. */
3382
3383 case 't':
3384 if (*argrest == 0) extract_recipients = TRUE;
3385
3386 /* -ti: Set flag to extract recipients from body of message, and also
3387 specify that dot does not end the message. */
3388
3389 else if (Ustrcmp(argrest, "i") == 0)
3390 {
3391 extract_recipients = TRUE;
3392 dot_ends = FALSE;
3393 }
3394
3395 /* -tls-on-connect: don't wait for STARTTLS (for old clients) */
3396
3397 #ifdef SUPPORT_TLS
817d9f57 3398 else if (Ustrcmp(argrest, "ls-on-connect") == 0) tls_in.on_connect = TRUE;
059ec3d9
PH
3399 #endif
3400
3401 else badarg = TRUE;
3402 break;
3403
3404
3405 /* -U: This means "initial user submission" in sendmail, apparently. The
3406 doc claims that in future sendmail may refuse syntactically invalid
3407 messages instead of fixing them. For the moment, we just ignore it. */
3408
3409 case 'U':
3410 break;
3411
3412
3413 /* -v: verify things - this is a very low-level debugging */
3414
3415 case 'v':
3416 if (*argrest == 0)
3417 {
3418 debug_selector |= D_v;
3419 debug_file = stderr;
3420 }
3421 else badarg = TRUE;
3422 break;
3423
3424
3425 /* -x: AIX uses this to indicate some fancy 8-bit character stuff:
3426
3427 The -x flag tells the sendmail command that mail from a local
3428 mail program has National Language Support (NLS) extended characters
3429 in the body of the mail item. The sendmail command can send mail with
3430 extended NLS characters across networks that normally corrupts these
3431 8-bit characters.
3432
3433 As Exim is 8-bit clean, it just ignores this flag. */
3434
3435 case 'x':
3436 if (*argrest != 0) badarg = TRUE;
3437 break;
3438
a3fb9793
PP
3439 /* -X: in sendmail: takes one parameter, logfile, and sends debugging
3440 logs to that file. We swallow the parameter and otherwise ignore it. */
3441
3442 case 'X':
3443 if (*argrest == '\0')
a3fb9793
PP
3444 if (++i >= argc)
3445 {
3446 fprintf(stderr, "exim: string expected after -X\n");
3447 exit(EXIT_FAILURE);
3448 }
0ad2e0fc
JH
3449 break;
3450
3451 case 'z':
3452 if (*argrest == '\0')
3453 if (++i < argc) log_oneline = argv[i]; else
3454 {
3455 fprintf(stderr, "exim: file name expected after %s\n", argv[i-1]);
3456 exit(EXIT_FAILURE);
3457 }
a3fb9793
PP
3458 break;
3459
059ec3d9
PH
3460 /* All other initial characters are errors */
3461
3462 default:
3463 badarg = TRUE;
3464 break;
3465 } /* End of high-level switch statement */
3466
3467 /* Failed to recognize the option, or syntax error */
3468
3469 if (badarg)
3470 {
3471 fprintf(stderr, "exim abandoned: unknown, malformed, or incomplete "
3472 "option %s\n", arg);
3473 exit(EXIT_FAILURE);
3474 }
3475 }
3476
3477
3cc66b45
PH
3478/* If -R or -S have been specified without -q, assume a single queue run. */
3479
3480if ((deliver_selectstring != NULL || deliver_selectstring_sender != NULL) &&
3481 queue_interval < 0) queue_interval = 0;
3482
3483
059ec3d9 3484END_ARG:
81ea09ca
NM
3485/* If usage_wanted is set we call the usage function - which never returns */
3486if (usage_wanted) exim_usage(called_as);
3487
3488/* Arguments have been processed. Check for incompatibilities. */
059ec3d9
PH
3489if ((
3490 (smtp_input || extract_recipients || recipients_arg < argc) &&
3491 (daemon_listen || queue_interval >= 0 || bi_option ||
3492 test_retry_arg >= 0 || test_rewrite_arg >= 0 ||
f05da2e8 3493 filter_test != FTEST_NONE || (msg_action_arg > 0 && !one_msg_action))
059ec3d9
PH
3494 ) ||
3495 (
3496 msg_action_arg > 0 &&
0ef732d9
PH
3497 (daemon_listen || queue_interval >= 0 || list_options ||
3498 (checking && msg_action != MSG_LOAD) ||
3499 bi_option || test_retry_arg >= 0 || test_rewrite_arg >= 0)
059ec3d9
PH
3500 ) ||
3501 (
3502 (daemon_listen || queue_interval >= 0) &&
3503 (sender_address != NULL || list_options || list_queue || checking ||
0ef732d9 3504 bi_option)
059ec3d9
PH
3505 ) ||
3506 (
3507 daemon_listen && queue_interval == 0
3508 ) ||
3509 (
9ee44efb
PP
3510 inetd_wait_mode && queue_interval >= 0
3511 ) ||
3512 (
059ec3d9
PH
3513 list_options &&
3514 (checking || smtp_input || extract_recipients ||
f05da2e8 3515 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3516 ) ||
3517 (
3518 verify_address_mode &&
3519 (address_test_mode || smtp_input || extract_recipients ||
f05da2e8 3520 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3521 ) ||
3522 (
3523 address_test_mode && (smtp_input || extract_recipients ||
f05da2e8 3524 filter_test != FTEST_NONE || bi_option)
059ec3d9
PH
3525 ) ||
3526 (
f05da2e8 3527 smtp_input && (sender_address != NULL || filter_test != FTEST_NONE ||
059ec3d9
PH
3528 extract_recipients)
3529 ) ||
3530 (
3531 deliver_selectstring != NULL && queue_interval < 0
328895cc
PH
3532 ) ||
3533 (
3534 msg_action == MSG_LOAD &&
3535 (!expansion_test || expansion_test_message != NULL)
059ec3d9
PH
3536 )
3537 )
3538 {
3539 fprintf(stderr, "exim: incompatible command-line options or arguments\n");
3540 exit(EXIT_FAILURE);
3541 }
3542
3543/* If debugging is set up, set the file and the file descriptor to pass on to
3544child processes. It should, of course, be 2 for stderr. Also, force the daemon
3545to run in the foreground. */
3546
3547if (debug_selector != 0)
3548 {
3549 debug_file = stderr;
3550 debug_fd = fileno(debug_file);
3551 background_daemon = FALSE;
3552 if (running_in_test_harness) millisleep(100); /* lets caller finish */
3553 if (debug_selector != D_v) /* -v only doesn't show this */
3554 {
3555 debug_printf("Exim version %s uid=%ld gid=%ld pid=%d D=%x\n",
3556 version_string, (long int)real_uid, (long int)real_gid, (int)getpid(),
3557 debug_selector);
6545de78
PP
3558 if (!version_printed)
3559 show_whats_supported(stderr);
059ec3d9
PH
3560 }
3561 }
3562
3563/* When started with root privilege, ensure that the limits on the number of
3564open files and the number of processes (where that is accessible) are
3565sufficiently large, or are unset, in case Exim has been called from an
3566environment where the limits are screwed down. Not all OS have the ability to
3567change some of these limits. */
3568
3569if (unprivileged)
3570 {
3571 DEBUG(D_any) debug_print_ids(US"Exim has no root privilege:");
3572 }
3573else
3574 {
3575 struct rlimit rlp;
3576
3577 #ifdef RLIMIT_NOFILE
3578 if (getrlimit(RLIMIT_NOFILE, &rlp) < 0)
3579 {
3580 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NOFILE) failed: %s",
3581 strerror(errno));
3582 rlp.rlim_cur = rlp.rlim_max = 0;
3583 }
eb2c0248
PH
3584
3585 /* I originally chose 1000 as a nice big number that was unlikely to
a494b1e1
PH
3586 be exceeded. It turns out that some older OS have a fixed upper limit of
3587 256. */
eb2c0248 3588
059ec3d9
PH
3589 if (rlp.rlim_cur < 1000)
3590 {
3591 rlp.rlim_cur = rlp.rlim_max = 1000;
3592 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
eb2c0248 3593 {
a494b1e1
PH
3594 rlp.rlim_cur = rlp.rlim_max = 256;
3595 if (setrlimit(RLIMIT_NOFILE, &rlp) < 0)
3596 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NOFILE) failed: %s",
3597 strerror(errno));
eb2c0248 3598 }
059ec3d9
PH
3599 }
3600 #endif
3601
3602 #ifdef RLIMIT_NPROC
3603 if (getrlimit(RLIMIT_NPROC, &rlp) < 0)
3604 {
3605 log_write(0, LOG_MAIN|LOG_PANIC, "getrlimit(RLIMIT_NPROC) failed: %s",
3606 strerror(errno));
3607 rlp.rlim_cur = rlp.rlim_max = 0;
3608 }
3609
3610 #ifdef RLIM_INFINITY
3611 if (rlp.rlim_cur != RLIM_INFINITY && rlp.rlim_cur < 1000)
3612 {
3613 rlp.rlim_cur = rlp.rlim_max = RLIM_INFINITY;
3614 #else
3615 if (rlp.rlim_cur < 1000)
3616 {
3617 rlp.rlim_cur = rlp.rlim_max = 1000;
3618 #endif
3619 if (setrlimit(RLIMIT_NPROC, &rlp) < 0)
3620 log_write(0, LOG_MAIN|LOG_PANIC, "setrlimit(RLIMIT_NPROC) failed: %s",
3621 strerror(errno));
3622 }
3623 #endif
3624 }
3625
3626/* Exim is normally entered as root (but some special configurations are
3627possible that don't do this). However, it always spins off sub-processes that
3628set their uid and gid as required for local delivery. We don't want to pass on
3629any extra groups that root may belong to, so we want to get rid of them all at
3630this point.
3631
3632We need to obey setgroups() at this stage, before possibly giving up root
3633privilege for a changed configuration file, but later on we might need to
3634check on the additional groups for the admin user privilege - can't do that
3635till after reading the config, which might specify the exim gid. Therefore,
3636save the group list here first. */
3637
3638group_count = getgroups(NGROUPS_MAX, group_list);
cd59ab18
PP
3639if (group_count < 0)
3640 {
3641 fprintf(stderr, "exim: getgroups() failed: %s\n", strerror(errno));
3642 exit(EXIT_FAILURE);
3643 }
059ec3d9
PH
3644
3645/* There is a fundamental difference in some BSD systems in the matter of
3646groups. FreeBSD and BSDI are known to be different; NetBSD and OpenBSD are
3647known not to be different. On the "different" systems there is a single group
3648list, and the first entry in it is the current group. On all other versions of
3649Unix there is a supplementary group list, which is in *addition* to the current
3650group. Consequently, to get rid of all extraneous groups on a "standard" system
3651you pass over 0 groups to setgroups(), while on a "different" system you pass
3652over a single group - the current group, which is always the first group in the
3653list. Calling setgroups() with zero groups on a "different" system results in
3654an error return. The following code should cope with both types of system.
3655
3656However, if this process isn't running as root, setgroups() can't be used
3657since you have to be root to run it, even if throwing away groups. Not being
3658root here happens only in some unusual configurations. We just ignore the
3659error. */
3660
3661if (setgroups(0, NULL) != 0)
3662 {
3663 if (setgroups(1, group_list) != 0 && !unprivileged)
3664 {
3665 fprintf(stderr, "exim: setgroups() failed: %s\n", strerror(errno));
3666 exit(EXIT_FAILURE);
3667 }
3668 }
3669
3670/* If the configuration file name has been altered by an argument on the
3671command line (either a new file name or a macro definition) and the caller is
cd25e41d
DW
3672not root, or if this is a filter testing run, remove any setuid privilege the
3673program has and run as the underlying user.
059ec3d9 3674
cd25e41d
DW
3675The exim user is locked out of this, which severely restricts the use of -C
3676for some purposes.
059ec3d9
PH
3677
3678Otherwise, set the real ids to the effective values (should be root unless run
3679from inetd, which it can either be root or the exim uid, if one is configured).
3680
3681There is a private mechanism for bypassing some of this, in order to make it
3682possible to test lots of configurations automatically, without having either to
3683recompile each time, or to patch in an actual configuration file name and other
3684values (such as the path name). If running in the test harness, pretend that
3685configuration file changes and macro definitions haven't happened. */
3686
3687if (( /* EITHER */
a7cbbf50
PP
3688 (!trusted_config || /* Config changed, or */
3689 !macros_trusted()) && /* impermissible macros and */
059ec3d9 3690 real_uid != root_uid && /* Not root, and */
059ec3d9
PH
3691 !running_in_test_harness /* Not fudged */
3692 ) || /* OR */
3693 expansion_test /* expansion testing */
3694 || /* OR */
f05da2e8 3695 filter_test != FTEST_NONE) /* Filter testing */
059ec3d9
PH
3696 {
3697 setgroups(group_count, group_list);
3698 exim_setugid(real_uid, real_gid, FALSE,
3699 US"-C, -D, -be or -bf forces real uid");
3700 removed_privilege = TRUE;
3701
3702 /* In the normal case when Exim is called like this, stderr is available
3703 and should be used for any logging information because attempts to write
3704 to the log will usually fail. To arrange this, we unset really_exim. However,
3705 if no stderr is available there is no point - we might as well have a go
b7487bce 3706 at the log (if it fails, syslog will be written).
059ec3d9 3707
b7487bce
PP
3708 Note that if the invoker is Exim, the logs remain available. Messing with
3709 this causes unlogged successful deliveries. */
3710
3711 if ((log_stderr != NULL) && (real_uid != exim_uid))
3712 really_exim = FALSE;
059ec3d9
PH
3713 }
3714
3715/* Privilege is to be retained for the moment. It may be dropped later,
3716depending on the job that this Exim process has been asked to do. For now, set
3717the real uid to the effective so that subsequent re-execs of Exim are done by a
3718privileged user. */
3719
3720else exim_setugid(geteuid(), getegid(), FALSE, US"forcing real = effective");
3721
f05da2e8 3722/* If testing a filter, open the file(s) now, before wasting time doing other
059ec3d9
PH
3723setups and reading the message. */
3724
f05da2e8
PH
3725if ((filter_test & FTEST_SYSTEM) != 0)
3726 {
3727 filter_sfd = Uopen(filter_test_sfile, O_RDONLY, 0);
3728 if (filter_sfd < 0)
3729 {
3730 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_sfile,
3731 strerror(errno));
3732 return EXIT_FAILURE;
3733 }
3734 }
3735
3736if ((filter_test & FTEST_USER) != 0)
059ec3d9 3737 {
f05da2e8
PH
3738 filter_ufd = Uopen(filter_test_ufile, O_RDONLY, 0);
3739 if (filter_ufd < 0)
059ec3d9 3740 {
f05da2e8 3741 fprintf(stderr, "exim: failed to open %s: %s\n", filter_test_ufile,
059ec3d9
PH
3742 strerror(errno));
3743 return EXIT_FAILURE;
3744 }
3745 }
3746
8829633f
PP
3747/* Initialise lookup_list
3748If debugging, already called above via version reporting.
3749In either case, we initialise the list of available lookups while running
3750as root. All dynamically modules are loaded from a directory which is
3751hard-coded into the binary and is code which, if not a module, would be
3752part of Exim already. Ability to modify the content of the directory
3753is equivalent to the ability to modify a setuid binary!
3754
3755This needs to happen before we read the main configuration. */
3756init_lookup_list();
3757
8c5d388a 3758#ifdef SUPPORT_I18N
9d4319df
JH
3759if (running_in_test_harness) smtputf8_advertise_hosts = NULL;
3760#endif
3761
059ec3d9
PH
3762/* Read the main runtime configuration data; this gives up if there
3763is a failure. It leaves the configuration file open so that the subsequent
3de973a2 3764configuration data for delivery can be read if needed.
059ec3d9 3765
3de973a2
HSHR
3766NOTE: immediatly after opening the configuration file we change the working
3767directory to "/"! Later we change to $spool_directory. We do it there, because
3768during readconf_main() some expansion takes place already. */
bc3c7bb7 3769
3615fa9a 3770/* Store the initial cwd before we change directories */
3ae121c9 3771if ((initial_cwd = os_getcwd(NULL, 0)) == NULL)
fae3a611
HSHR
3772 {
3773 perror("exim: can't get the current working directory");
3774 exit(EXIT_FAILURE);
3775 }
3615fa9a 3776
34e86e20
HSHR
3777/* checking:
3778 -be[m] expansion test -
3779 -b[fF] filter test new
3780 -bh[c] host test -
3781 -bmalware malware_test_file new
3782 -brt retry test new
3783 -brw rewrite test new
3784 -bt address test -
3785 -bv[s] address verify -
3786 list_options:
3787 -bP <option> (except -bP config, which sets list_config)
3788
3789If any of these options is set, we suppress warnings about configuration
3790issues (currently about tls_advertise_hosts and keep_environment not being
3791defined) */
3792
3793readconf_main(checking || list_options);
059ec3d9 3794
3de973a2
HSHR
3795/* Now in directory "/" */
3796
bc3c7bb7
HSHR
3797if (cleanup_environment() == FALSE)
3798 log_write(0, LOG_PANIC_DIE, "Can't cleanup environment");
3799
3800
a3fb9793
PP
3801/* If an action on specific messages is requested, or if a daemon or queue
3802runner is being started, we need to know if Exim was called by an admin user.
3803This is the case if the real user is root or exim, or if the real group is
3804exim, or if one of the supplementary groups is exim or a group listed in
3805admin_groups. We don't fail all message actions immediately if not admin_user,
3806since some actions can be performed by non-admin users. Instead, set admin_user
3807for later interrogation. */
3808
3809if (real_uid == root_uid || real_uid == exim_uid || real_gid == exim_gid)
3810 admin_user = TRUE;
3811else
3812 {
3813 int i, j;
3814 for (i = 0; i < group_count; i++)
3815 {
3816 if (group_list[i] == exim_gid) admin_user = TRUE;
3817 else if (admin_groups != NULL)
3818 {
3819 for (j = 1; j <= (int)(admin_groups[0]); j++)
3820 if (admin_groups[j] == group_list[i])
3821 { admin_user = TRUE; break; }
3822 }
3823 if (admin_user) break;
3824 }
3825 }
3826
3827/* Another group of privileged users are the trusted users. These are root,
3828exim, and any caller matching trusted_users or trusted_groups. Trusted callers
3829are permitted to specify sender_addresses with -f on the command line, and
3830other message parameters as well. */
3831
3832if (real_uid == root_uid || real_uid == exim_uid)
3833 trusted_caller = TRUE;
3834else
3835 {
3836 int i, j;
3837
3838 if (trusted_users != NULL)
3839 {
3840 for (i = 1; i <= (int)(trusted_users[0]); i++)
3841 if (trusted_users[i] == real_uid)
3842 { trusted_caller = TRUE; break; }
3843 }
3844
3845 if (!trusted_caller && trusted_groups != NULL)
3846 {
3847 for (i = 1; i <= (int)(trusted_groups[0]); i++)
3848 {
3849 if (trusted_groups[i] == real_gid)
3850 trusted_caller = TRUE;
3851 else for (j = 0; j < group_count; j++)
3852 {
3853 if (trusted_groups[i] == group_list[j])
3854 { trusted_caller = TRUE; break; }
3855 }
3856 if (trusted_caller) break;
3857 }
3858 }
3859 }
3860
059ec3d9
PH
3861/* Handle the decoding of logging options. */
3862
6c6d6e48 3863decode_bits(log_selector, log_selector_size, log_notall,
ed7f7860 3864 log_selector_string, log_options, log_options_count, US"log", 0);
059ec3d9
PH
3865
3866DEBUG(D_any)
3867 {
6c6d6e48 3868 int i;
059ec3d9 3869 debug_printf("configuration file is %s\n", config_main_filename);
6c6d6e48
TF
3870 debug_printf("log selectors =");
3871 for (i = 0; i < log_selector_size; i++)
3872 debug_printf(" %08x", log_selector[i]);
3873 debug_printf("\n");
059ec3d9
PH
3874 }
3875
3876/* If domain literals are not allowed, check the sender address that was
3877supplied with -f. Ditto for a stripped trailing dot. */
3878
3879if (sender_address != NULL)
3880 {
3881 if (sender_address[sender_address_domain] == '[' && !allow_domain_literals)
3882 {
3883 fprintf(stderr, "exim: bad -f address \"%s\": domain literals not "
3884 "allowed\n", sender_address);
3885 return EXIT_FAILURE;
3886 }
3887 if (f_end_dot && !strip_trailing_dot)
3888 {
3889 fprintf(stderr, "exim: bad -f address \"%s.\": domain is malformed "
3890 "(trailing dot not allowed)\n", sender_address);
3891 return EXIT_FAILURE;
3892 }
3893 }
3894
a3fb9793
PP
3895/* See if an admin user overrode our logging. */
3896
3897if (cmdline_syslog_name != NULL)
3898 {
3899 if (admin_user)
3900 {
3901 syslog_processname = cmdline_syslog_name;
3902 log_file_path = string_copy(CUS"syslog");
3903 }
3904 else
3905 {
3906 /* not a panic, non-privileged users should not be able to spam paniclog */
3907 fprintf(stderr,
3908 "exim: you lack sufficient privilege to specify syslog process name\n");
3909 return EXIT_FAILURE;
3910 }
3911 }
3912
059ec3d9
PH
3913/* Paranoia check of maximum lengths of certain strings. There is a check
3914on the length of the log file path in log.c, which will come into effect
3915if there are any calls to write the log earlier than this. However, if we
3916get this far but the string is very long, it is better to stop now than to
3917carry on and (e.g.) receive a message and then have to collapse. The call to
3918log_write() from here will cause the ultimate panic collapse if the complete
3919file name exceeds the buffer length. */
3920
3921if (Ustrlen(log_file_path) > 200)
3922 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3923 "log_file_path is longer than 200 chars: aborting");
3924
3925if (Ustrlen(pid_file_path) > 200)
3926 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3927 "pid_file_path is longer than 200 chars: aborting");
3928
3929if (Ustrlen(spool_directory) > 200)
3930 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3931 "spool_directory is longer than 200 chars: aborting");
3932
3933/* Length check on the process name given to syslog for its TAG field,
3934which is only permitted to be 32 characters or less. See RFC 3164. */
3935
3936if (Ustrlen(syslog_processname) > 32)
3937 log_write(0, LOG_MAIN|LOG_PANIC_DIE,
3938 "syslog_processname is longer than 32 chars: aborting");
3939
0ad2e0fc
JH
3940if (log_oneline)
3941 {
3942 if (admin_user)
3943 {
3944 log_write(0, LOG_MAIN, "%s", log_oneline);
3945 return EXIT_SUCCESS;
3946 }
3947 else
3948 return EXIT_FAILURE;
3949 }
3950
059ec3d9
PH
3951/* In some operating systems, the environment variable TMPDIR controls where
3952temporary files are created; Exim doesn't use these (apart from when delivering
3953to MBX mailboxes), but called libraries such as DBM libraries may require them.
3954If TMPDIR is found in the environment, reset it to the value defined in the
8f3bfb82
HSHR
3955EXIM_TMPDIR macro, if this macro is defined. For backward compatibility this
3956macro may be called TMPDIR in old "Local/Makefile"s. It's converted to
3957EXIM_TMPDIR by the build scripts.
3958*/
059ec3d9 3959
75286da3 3960#ifdef EXIM_TMPDIR
059ec3d9
PH
3961 {
3962 uschar **p;
bc3c7bb7 3963 if (environ) for (p = USS environ; *p != NULL; p++)
059ec3d9
PH
3964 {
3965 if (Ustrncmp(*p, "TMPDIR=", 7) == 0 &&
75286da3 3966 Ustrcmp(*p+7, EXIM_TMPDIR) != 0)
059ec3d9 3967 {
75286da3
AT
3968 uschar *newp = malloc(Ustrlen(EXIM_TMPDIR) + 8);
3969 sprintf(CS newp, "TMPDIR=%s", EXIM_TMPDIR);
059ec3d9 3970 *p = newp;
75286da3 3971 DEBUG(D_any) debug_printf("reset TMPDIR=%s in environment\n", EXIM_TMPDIR);
059ec3d9
PH
3972 }